JP5719820B2 - Plate heat exchanger - Google Patents

Description

  The present invention relates to a plate heat exchanger having a plurality of heat transfer plates.

  Conventionally, a brazing-type plate heat exchanger has been provided as one of the plate heat exchangers. In this type of plate heat exchanger, a plurality of stacked heat transfer plates are integrated by brazing, and as shown in FIG. 10, the first space A through which the first fluid flows and the second fluid are circulated. While the second space B to be circulated is alternately formed with the heat transfer plates 2 and 3 as a boundary, the first inflow path R1 and the first outflow path R2 communicating only with the first space A are formed. A second inflow path R3 and a second outflow path R4 communicating only with the second space B are formed.

  Accordingly, each of the plurality of heat transfer plates 2 and 3 is a heat transfer portion 20 and 30 having a first surface F1 and a second surface F2 opposite to the first surface F1, as shown in FIG. The heat transfer section 20 that defines the first space A on one surface of the F1 or the second surface F2 and defines the second space B on the other surface of the first surface F1 or the second surface F2. 30.

  The heat transfer parts 20 and 30 have a plurality of concave lines and convex lines (not numbered) on each of the first surface F1 and the second surface F2, and at least four openings 22a, 22b, 22c, 22d, and 32a. , 32b, 32c, 32d (see FIG. 10). In the following description, two of the four openings 22a, 22b, 32a, and 32b are referred to as first openings, and the remaining two openings 22c, 22d, 32c, and 32d are referred to as first openings. Let it be the second opening.

  Each of the plurality of heat transfer plates 2... 3, as shown in FIG. 11A, is in a stacked state and is one of the two heat transfer plates 2 and 3 adjacent on both sides. , 3 of the first openings 22a, 32a (22b, 32b) and the peripheral parts 23a, 33a (23b, 33b) of the first openings 22a, 32a, (22b, 32b). 11), as shown in FIG. 11B, around the second openings 22c, 32c, (22d, 32d) of the other heat transfer plate 2, 3 of the two heat transfer plates 2, 3 adjacent to each other The peripheral portions 23c and 33c (23d and 33d) of the second openings 22c and 32c (22d and 32d) are brought into close contact with the portions 23c and 33c (23d and 33d). Further, each of the plurality of heat transfer plates 2... 3 crosses its own ridge with the ridges of the adjacent heat transfer plates 2 and 3.

  Accordingly, the plurality of heat transfer plates 2... 3 are brazed in a stacked state, and the peripheral portions 23a and 33a of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d that are in close contact with each other. , 23b, 33b, 23c, 33c, 23d, 33d are sealed, and the protruding ridges that have crossed each other are also connected. As a result, the first inflow path R1, the first space A, and the first outflow path R2 are formed as the distribution paths for distributing the first fluid, and the second inflow path R3 as the distribution path for distributing the second fluid. The second space B and the second outflow path R4 are formed.

  By the way, in order to allow the flow of the fluid, as shown in FIG. 11, the peripheral portions 23a, 33a, 23b, 33b of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d in the heat transfer portions 20, 30 are provided. , 23c, 33c, 23d, 33d, the surface opposite to the surface to be brazed (the surface in close contact with the adjacent heat transfer plates 2, 3) is separated from the opposed heat transfer portions 20, 30, and the first space A Alternatively, a space continuous with either one of the second spaces B is defined. Therefore, when the pressure of the supplied fluid (first fluid, second fluid) acts, the inflow channel (first inflow channel R1, second inflow channel R3) or the outflow channel (first outflow channel R2, second outflow channel). R4) is formed by connecting the ridges adjacent to the peripheral portions 23a, 32a, 23b, 33b, 23c, 33c, 23d, 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d. There is a possibility that a bending action occurs in the portion and the portion is damaged.

  In view of such a situation, as shown in FIGS. 12A and 12B, the heat transfer plates 2 and 3 adjacent to each other around the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d and 32d of the heat transfer plates 2 and 3 are provided. There has been proposed a structure in which support portions 26 and 36 bulged toward the surface are formed (see, for example, Patent Document 1).

  In such a plate heat exchanger 1, one of the two heat transfer plates 2 and 3 that are adjacent to each other in a stacked state has a first opening 22a as shown in FIG. 13A. As shown in FIG. 13B, a support portion 26 is formed that includes the edge that defines (22b) and partially bulges the peripheral portion 23a (23b) toward the second surface F2 side of the heat transfer portion 20. A support portion 26 is formed that includes an edge that defines the second opening 22c (22d) and has the peripheral portion 23c (23d) partially bulged toward the first surface F1 side of the heat transfer portion 20. On the other hand, as shown in FIG. 13A, the first opening 32a (32b) is formed in the other heat transfer plate 3 of the two heat transfer plates 2 and 3 that are adjacent to each other in the stacked state. A support portion 36 is formed in which the peripheral portion 33a (33b) is partially expanded to the first surface F1 side of the heat transfer portion 30 including the defining edge, and as shown in FIG. 13B, the second opening 32c is formed. A support portion 36 is formed in which the peripheral portion 33c (33d) is partially expanded toward the second surface F2 side of the heat transfer portion 30 including the edge defining (32d).

  Each of the plurality of heat transfer plates 2, 3, and the like is stacked on the support portions 26 and 36 of the adjacent heat transfer plates 2, 3, and so on, as shown in FIGS. 13A and 13B. The support portions 26 and 36 are brought into close contact with each other. The support portions 26 and 36 are connected to each other by brazing, so that the peripheral portions 23a and 33a (23b and 33b) of the first openings 22a and 32a (22b and 32b) and the second openings 22c and 32c (22d) are connected. , 32d) is supported by the support portions 26, 36 of the adjacent heat transfer plates 2, 3 in the peripheral portions 23c, 33c (23d, 33d).

  Thereby, even if the fluid pressure of the fluid flowing through the first space A or the second space B acts, it is difficult for a bending action with the intersection of the ridges to cross each other to occur, and the first openings 22a and 32a. , 22b, 32b and the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d in the vicinity of each of the second openings 22c, 22d, 32c, 32d.

  By the way, as described above, when the opposing support portions (top portions) 26 and 36 are connected to each other, each support portion 26 and 36 exists in a space formed between the adjacent heat transfer plates 2 and 3. Further, together with the support portions 26, 36 on the opposite side of the connected support portions 26, 36, an inflow path (first inflow path R1, second inflow path R3) or an outflow path (first outflow path R2, second outflow path R4). ) Is formed to open the pocket P. Therefore, the supplied fluid enters the pocket P in the vicinity of the inflow channels R1 and R3, and the fluid from the upstream side flows around the support portions 26 and 36 in the vicinity of the outflow channels R2 and R4.

  Therefore, in the plate heat exchanger 1 having the above-described configuration, the flow of fluid is inhibited by the support portions 26 and 36, so that the pressure loss increases and the flow rate of the fluid in the first space A and the second space B decreases. As a result, the heat exchange efficiency decreases. Further, since the pocket P is a dead-end space, if the fluid pressure is high, the pressure in the pocket P increases, and the support portions 26 and 36 or the vicinity thereof may be damaged.

  In order to solve such a problem, as shown in FIG. 14, it opens in the direction corresponding to the flow of fluid, and the first surface F1 side and the second surface of the heat transfer plate at the boundary between the support portions 26 and 36 and the periphery. There is provided a plate heat exchanger 1 in which open portions 26a and 36a communicating with the F2 side are formed (see, for example, Patent Document 2).

  According to the plate heat exchanger 1, the support portions 26 and 36 are connected to the top portions of the support portions 26 and 36 of the adjacent heat transfer plates 2 and 3, and the top portions of the support portions 26 and 36 are connected to each other. A tunnel penetrating in the flow direction of the fluid is formed together with the support portions 26 and 36 on the opposite side to 36. Accordingly, the fluid flow is smooth in the vicinity of any of the inflow channels R1, R3 and the outflow channels R2, R4. Thereby, it can suppress that a pressure loss becomes high, and can obtain a required heat exchange performance as a result (for example, refer patent document 2).

Special table 2011-516816 gazette Special table 2012-512380 gazette

  By the way, as described above, when the open portions 26a and 36a are provided at the boundaries between the support portions 26 and 36 and the periphery, the support portions 26 and 36 each have a distal end and a proximal end as shown in FIG. A pair of legs 260, 260, 360, 360, spaced in the circumferential direction of the openings 22a, 32a, 22c, 32c, 22b, 32b, 22d, 32d forming the inflow channels R1, R3 or the outflow channels R2, R4 And a pair of legs 260, 260, 360, 360 having base ends connected to the periphery of the openings 22a, 32a, 22c, 32c, 22b, 32b, 22d, 32d, and the support portions 26, 36. The bridging portions 261 and 361 that constitute the tops of the pair of leg portions 260, 260, 360, and 360 are connected to each other.

  Therefore, as described above, when the support portions 26 and 36 of the adjacent heat transfer plates 2 and 3 are connected to each other, the respective leg portions 260 and 360 of the connected support portions 26 and 36 are stacked on the heat transfer plates 2 and 3. It will be in a state aligned in the direction. That is, only the leg portions 260 and 360 of the support portions 26 and 36 of any one of the adjacent heat transfer plates 2 and 3 exist in the cross section of each portion in the stacking direction of the heat transfer plates 2 and 3.

  Therefore, when the fluid pressure tries to separate the adjacent heat transfer plates 2 and 3, the tensile force acting on the support portions 26 and 36 connected to each other is supported by the support of the adjacent heat transfer plates 2 and 3. It does not disperse | distribute to each of the leg parts 260 and 360 of the parts 26 and 36, but acts on these support parts 26 and 36 (leg parts 260 and 360) in a row. That is, only the cross-section of the leg portions 260 and 360 of either one of the adjacent heat transfer plates 2 and 3 is in a state equivalent to resisting the tensile force. Therefore, in order to obtain sufficient rigidity, the number of support portions 26 (leg portions 260, 360) provided on each of the heat transfer plates 2 and 3 must be increased. , 3 (the leg portions 260, 360 and the top portions 260, 360 constituting the support portions 26, 36) are increased, and the flow of fluid is hindered.

  Therefore, in view of such circumstances, the present invention is a plate-type heat whose rigidity around the opening of the heat transfer plate forming at least one of the inflow path and the outflow path is enhanced while ensuring a smooth flow of fluid. It is an object to provide an exchanger.

  The plate heat exchanger according to the present invention is a heat transfer part in which a plurality of concave and convex stripes are formed on both the front and back surfaces, and has a plurality of heat transfer parts having heat transfer parts provided with openings at least at four locations. A plurality of heat transfer plates stacked so as to overlap the respective heat transfer portions, and a first space through which the first fluid flows through each heat transfer portion as a boundary; In addition to the alternate formation of the second space through which the two fluids are circulated, each of the two openings out of the four places is connected in the stacking direction of the heat transfer plates and communicates only with the first space. A first inflow path and a first outflow path are formed, and the second two inflow paths and the second inflow paths each of the remaining two openings out of the four positions are connected to the second space in the stacking direction of the heat transfer plates. In a plate heat exchanger with two outflow channels Each of the heat transfer plates adjacent to each other in the stacked state has a corresponding opening forming at least one of the first inflow path, the second inflow path, the first outflow path, and the second outflow path. The peripheral portion of the heat transfer portion is formed on one surface side of the heat transfer portion, while forming a convex surface on the other surface side, and at the boundary with the surrounding peripheral portion One or more support portions are provided that form an open portion that penetrates one surface side and the other surface side of the heat transfer portion, and the peripheral portion of the opening of each heat transfer plate is adjacent to two adjacent heat transfer plates on both sides. A space continuous with either the first space or the second space is formed between the peripheral portion of the opening of any one of the heat plates and the support portion of each heat transfer plate is provided on both sides. Of one of the two adjacent heat transfer plates. A concave non-formation position or support portion of the support portion in the side portion, characterized in that it is brazed to the concave surface of the non-formation position or support portion of the support portion in the space.

  According to the plate heat exchanger according to the present invention, the support portion of each heat transfer plate is a support portion in the peripheral portion of the opening of one of the two heat transfer plates adjacent on both sides. In the non-formation position or the concave surface of the support part, and brazed to the non-formation position of the support part in the space or the concave surface of the support part, support in one of the adjacent heat transfer plates The portion is connected to the peripheral portion of the opening of the other heat transfer plate, and the support portion in the other heat transfer plate of the adjacent heat transfer plates is connected to the peripheral portion of the opening of the one heat transfer plate.

  As a result, the peripheral portions of the openings of the adjacent heat transfer plates support each other via the support portion, and even if fluid pressure acts, the bending action using the portion where the ridges intersect each other as a fulcrum is performed. It becomes difficult to occur.

  Moreover, in the plate-type heat exchanger having the above-described configuration, each support portion of the adjacent heat transfer plate is a space continuous with the first space or the second space (inlet or outlet in the first space or the second space). Aligned around the opening. As a result, the force (the pulling force acting on the support portion) that causes the fluid pressure to act to separate the adjacent heat transfer plates is dispersed in the respective support portions of the adjacent heat transfer plates. That is, it opposes a pulling force at each support portion of adjacent heat transfer plates. Thereby, even if it does not increase the number of the support parts provided in each heat-transfer plate, required and sufficient rigidity can be acquired.

  The support portion forms a convex surface on one side of the heat transfer portion, while forming a concave surface on the other surface side, and one of the heat transfer portions at the boundary with the surrounding peripheral portion. An open portion that penetrates the surface side and the other surface side is formed. Therefore, the support portion of each heat transfer plate is the non-formation position of the support portion or the concave surface of the support portion in the peripheral portion of the opening of one of the two heat transfer plates adjacent on both sides. Then, the first space or the first space or at least one of the support portions aligned in the circumferential direction of the opening and the open portion by brazing to the non-formation position of the support portion in the space or the concave surface of the support portion. Fluid distribution to the second space is ensured.

  As one aspect of the present invention, the support portion is a pair of leg portions arranged at intervals in the circumferential direction of the opening, and is on one surface side of the proximal end and the heat transfer portion connected to the surrounding peripheral portion Or a pair of legs having tips extending to the other surface, the tips of the pair of legs are connected directly or indirectly, and at least the tips of the legs are not formed on the support portion or You may braze to the concave surface of a support part. If it does in this way, even if it is a single support part, a pair of legs can counter a pulling force. In addition, since a space continuous with the open portion is formed between the pair of leg portions, it is possible to ensure a smooth flow of fluid.

  In this case, the support portion may further include a bridging portion that connects the tips of the pair of leg portions, and the bridging portion may be brazed to a non-formation position of the support portion or a concave surface of the support portion. If it does in this way, the joint area of the support part with respect to the other heat-transfer plate can be enlarged, and the connection strength in the peripheral part of the opening of an adjacent heat-transfer plate can be raised. Further, the ends of the pair of leg portions are arranged with a gap in the presence of the bridging portion. Accordingly, it is possible to widen the space that is continuous with the open portion and is formed between the pair of leg portions, and to ensure smooth fluid flow.

  In these cases, it is preferable that the support portion is arranged with its leg portion spaced apart from the leg portion of the support portion of the counterpart heat transfer plate in the circumferential direction of the opening. If it does in this way, space will be formed between the leg parts of each support part of an adjacent heat exchanger plate. Thereby, since not only an open part but the leg part of each support part of adjacent heat exchanger plates communicates with respect to the 1st space or the 2nd space, smooth circulation of fluid can be secured.

  As another aspect of the present invention, the support portion is provided in a peripheral portion of an opening that forms at least one of the first inflow passage and the second inflow passage, and is at least one of the first inflow passage and the second inflow passage. It is preferable that the opening is formed in a predetermined region facing the opening that forms at least one of the first outflow path and the second outflow path. In this way, the rigidity of the peripheral portion of the opening that is greatly affected by the fluid pressure is increased. Moreover, the smooth distribution of the fluid is ensured by the open part formed by the support part.

  As another aspect of the present invention, a plurality of support portions may be provided at intervals in the circumferential direction of the opening. If it does in this way, the peripheral parts of the opening of an adjacent heat-transfer plate will mutually support at several places via a several support part. Thereby, necessary and sufficient rigidity can be obtained around the opening.

  As described above, according to the present invention, it is possible to increase the rigidity around the opening of the heat transfer plate forming at least one of the inflow path and the outflow path while ensuring a smooth flow of the fluid. The effects can be achieved.

FIG. 1 is a schematic exploded perspective view of a plate heat exchanger according to an embodiment of the present invention. FIG. 2 is a plan view of a heat transfer plate constituting the plate heat exchanger according to the embodiment, and FIG. 2A is a view of one heat transfer plate (first heat transfer plate) of adjacent heat transfer plates. FIG. 2B is a front view of the first heat transfer plate shown in FIG. 2A. FIG. 3 is a plan view of a heat transfer plate constituting the plate heat exchanger according to the embodiment, and FIG. 3A is a view of the other heat transfer plate (second heat transfer plate) of adjacent heat transfer plates. FIG. 3B is a front view of the second heat transfer plate shown in FIG. 3A. FIG. 4 is a partially enlarged cross-sectional view of the plate heat exchanger according to the embodiment, and is a partially enlarged cross-sectional view including a first inflow path (first outflow path). FIG. 5 is a partial enlarged cross-sectional view of the plate heat exchanger according to the embodiment, and is a partial enlarged cross-sectional view including a second inflow path (second outflow path). FIG. 6 is a partially enlarged view of a heat transfer plate constituting the plate heat exchanger according to the embodiment, and FIG. 6A is a partially enlarged view around the first opening in the first heat transfer plate. 6B is a cross-sectional view taken along the line II in FIG. 6A, FIG. 6C is a partially enlarged view around the second opening in the first heat transfer plate, and FIG. 6D is a cross-sectional view taken along the line II-II in FIG. FIG. 7 is a partially enlarged view of a heat transfer plate constituting the plate heat exchanger according to the embodiment, and FIG. 7A is a partially enlarged view around the first opening in the second heat transfer plate. 7B is a cross-sectional view taken along the line III-III in FIG. 7A, FIG. 7C is a partially enlarged view around the second opening in the second heat transfer plate, and FIG. 7D is a cross-sectional view taken along the line IV-IV in FIG. FIG. 8 is a plan view of a heat transfer plate constituting a plate heat exchanger according to another embodiment of the present invention, and FIG. 8A shows one heat transfer plate (first heat transfer plate) of adjacent heat transfer plates. 8B is a rear view of the first heat transfer plate shown in FIG. 8A. FIG. 9 is a plan view of a heat transfer plate (a heat transfer plate combined with the heat transfer plate shown in FIG. 8) constituting a plate heat exchanger according to another embodiment, and FIG. 9A shows adjacent heat transfer plates. FIG. 9B is a front view of the other heat transfer plate (second heat transfer plate) of the plate, and FIG. 9B is a rear view of the second heat transfer plate shown in FIG. 9A. FIG. 10 is a schematic exploded perspective view of a conventional plate heat exchanger. 11 is a partial enlarged cross-sectional view of the plate heat exchanger shown in FIG. 10, FIG. 11A is a partial enlarged cross-sectional view including a first inflow path (first outflow path), and FIG. It is a partial expanded sectional view including an inflow channel (second outflow channel). FIG. 12 is a schematic partial enlarged view of a heat transfer plate constituting a conventional improved plate heat exchanger. FIG. 12A is a diagram of one surface side around an opening forming an inflow path (outflow path). FIG. 12B is a schematic partial enlarged plan view, and FIG. 12B is a rear view of the portion shown in FIG. 12A. FIG. 13 is a partial cross-sectional view of a conventional improved plate heat exchanger, FIG. 13A is a partially enlarged cross-sectional view including a first inflow path (first outflow path), and FIG. 13B is a second cross-sectional view. It is a partial expanded sectional view including an inflow channel (second outflow channel). 14 is a partial cross-sectional view of an improved plate heat exchanger according to another conventional embodiment, and FIG. 14A is a partial enlarged cross-sectional view including a first inflow path (first outflow path), and FIG. These are the partial expanded sectional views containing a 2nd inflow path (2nd outflow path). FIG. 15 is an enlarged view of a main part of the plate heat exchanger shown in FIG.

  Hereinafter, a plate heat exchanger according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  First, the outline | summary of the plate type heat exchanger which concerns on this embodiment is demonstrated. As shown in FIG. 1, the plate heat exchanger includes a plurality of heat transfer plates 2 and 3. The plate heat exchanger 1 is brazed in a state where a plurality of heat transfer plates 2 and 3 are laminated, so that a first space A in which the first fluid is circulated and a second space B in which the second fluid is circulated. Are formed alternately with the heat transfer plates 2 and 3 as a boundary, and a first inflow path R1 and a first outflow path R2 communicating only with the first space A are formed, and only the second space B is formed. A second inflow channel R3 and a second outflow channel R4 are formed.

  As shown in FIGS. 2 and 3, each of the plurality of heat transfer plates 2 and 3 is a heat transfer section 20 or 30 having a first surface F1 and a second surface F2 opposite to the first surface F1, and the first surface F1. Alternatively, the first space A is defined by any one surface of the second surface F2, and the heat transfer sections 20, 30 are defined by the other surface of the first surface F1 or the second surface F2. Is provided. And this kind of heat-transfer plate 2 and 3 is further provided with the annular parts 21 and 31 extended in the direction which cross | intersects with respect to this heat-transfer part 20 and 30 from the outer periphery perimeter of the heat-transfer part 20 and 30. .

  The heat transfer parts 20 and 30 have a plurality of concave lines and convex lines (not numbered) on each of the first surface F1 and the second surface F2, and at least four openings 22a, 22b, 22c, 22d, and 32a. , 32b, 32c, 32d. Of the four openings 22a, 22b, 22c, 22d, 32a, 32b, 32c, and 32d, the two openings (hereinafter, these two openings are referred to as first openings) 22a, 32a, 22b, and 32b, It is a hole for forming the first inflow path R1 and the first outflow path R2, and the remaining two openings (hereinafter referred to as four openings 22a, 22b, 22c, 22d, 32a, 32b, 32c, 32d) 22c, 32c, 22d, and 32d are holes for forming a second inflow path R3 and a second outflow path R4.

  Accordingly, the peripheral portions 23a, 33a, 23b, and 33b of the first openings 22a, 32a, 22b, and 32b are displaced to either the first surface F1 or the second surface F2, and the second openings 22c. , 22d, 32c, 32d, the peripheral portions 23c, 33c, 23d, 33d are either the first surface F1 or the second surface F2 (the peripheral portions 23c of the first openings 22a, 32a, 22b, 32b, 33c, 23d and 33d).

  2A and 3A, peripheral portions 23a, 23b, 33c, and openings 22a, 22b, 32c, and 32d (first openings 22a and 22b in FIG. 2A and second openings 32c and 32d in FIG. 3A). 33d is hatched to express that the portion is displaced to the near side (first surface side) and the openings 22c, 22d, 32a, 32b (in FIG. 2A, the second openings 22c, 22d, FIG. In 3A, the peripheral portions 23c, 23d, 33a, 33b of the first openings 32a, 32b) are not hatched, and the portion is displaced to the back side (second surface side). . 2B and 3B, peripheral portions 23c, 23d, 33a of the openings 22c, 22d, 32a, and 32b (second openings 22c and 22d in FIG. 2B and the first openings 32a and 32b in FIG. 3B). 33b is hatched to express that the portion is displaced to the near side (second surface side), and the openings 22a, 22b, 32c, 32d (in FIG. 2B, the first openings 22a, 22b, FIG. 3B). 2 represents that the peripheral portions 23a, 23b, 33c, and 33d of the second openings 32c and 32d) are not hatched, and the portions are displaced to the back side (first surface side).

  Accordingly, each of the plurality of heat transfer plates 2 and 3 is in a stacked state, as shown in FIGS. 4 and 5, and heat transfer is performed on one of the two heat transfer plates 2 and 3 adjacent on both sides. The peripheral portions 23a, 33a, 22b and 33b of the first openings 22a, 32a, 22b and 32b of the plates 2 and 3 are in close contact with the peripheral portions 23a, 33a, 23b and 33b of the first openings 22a, 32a, 22b and 32b. (See FIG. 4), the peripheral portions 23c, 33c, 23d of the second openings 22c, 32c, 22d, 32d of the other heat transfer plate 2, 3 of the two heat transfer plates 2, 3 adjacent on both sides. , 33d are brought into close contact with the peripheral portions 23c, 33c, 23d, 33d of their second openings 22c, 32c, 22d, 32d (see FIG. 5).

  In addition, each of the plurality of heat transfer plates 2 and 3 is stacked, and the first openings 22a of the other heat transfer plates 2 and 3 of the two heat transfer plates 2 and 3 adjacent to each other on both sides. The first space A is spaced apart from the peripheral portions 23a, 33a, 23b, 33b of its own first openings 22a, 32a, 22b, 32b with respect to the peripheral portions 23a, 33a, 23b, 33b of 32a, 22b, 32b. A continuous space is formed (see FIG. 4), and peripheral portions of the second openings 22c, 32c, 22d, and 32d of one of the two heat transfer plates 2 and 3 adjacent to each other on both sides 23c, 33c, 23d, and 33d form a space that is continuous with the second space B at a distance from the peripheral portions 23c, 33c, 23d, and 33d of the second openings 22c, 32c, 22d, and 32d. (See FIG. 5).

  Each of the plurality of heat transfer plates 2 and 3 is adjacent to each other while fitting the annular portions 21 and 31 of the adjacent heat transfer plates 2 and 3 and the annular portions 21 and 31 thereof in a stacked state. The ridges of the heat transfer plates 2 and 3 are cross-abutted with the ridges of the heat transfer portions 20 and 30.

  In the present embodiment, each of the plurality of heat transfer plates 2 and 3 has openings 23a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, Support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d obtained by extruding 33d are provided.

  The support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are on the surface of either one of the heat transfer portions 20 and 30 (the surface of either the first surface F1 or the second surface F2). While forming a convex surface, a concave surface is formed on the other surface (the other surface of the first surface F1 or the second surface F2). Further, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are heat transfer portions 20, 30 at the boundaries with the surrounding peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d. Opening portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d penetrating one surface side and the other surface side are formed.

  That is, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are peripheral portions 23a, 33a, and 23b that are peripheral in the radial direction of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d. , 33b, 23c, 33c, 23d, and 33d are extruded to one of the first surface F1 and the second surface F2 of the heat transfer sections 20 and 30 in a partially divided state. The support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are the peripheral portions 23a, 33a of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d of the counterpart heat transfer plates 2, 3. , 23b, 33b, 23c, 33c, 23d, 33d, the positions where the support portions 24a, 24b, 24c, 24d, 34a, 34b are not formed or the concave surfaces of the support portions 34c, 34d, and adjacent heat transfer plates 2, 3 Are in contact with the non-formation positions of the support portions 24a, 24b, 24c, 24d, 34a, 34b or the concave surfaces of the support portions 34c, 34d.

  The plurality of heat transfer plates 2 and 3 are in contact with each other in a stacked state (for example, the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d, and the annular portions 21, 31). The support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d and the other heat transfer portions 20, 30) are brazed and integrated.

  The outline of the plate heat exchanger 1 according to the present embodiment is as described above. Hereinafter, based on the above description, the plate heat exchanger 1 according to the present embodiment will be described in more detail.

  As shown in FIGS. 2 and 3, the plate heat exchanger 1 of the present embodiment includes two types of heat transfer plates (hereinafter, one heat transfer plate and the first heat transfer plate 2 as heat transfer plates 2 and 3). The other heat transfer plate is referred to as a second heat transfer plate 3).

  The first heat transfer plate 2 and the second heat transfer plate 3 are formed by press-molding a metal plate, and both include heat transfer portions 20 and 30 and annular portions 21 and 31.

  As shown in FIG. 2, the heat transfer section 20 of the first heat transfer plate 2 is formed in a rectangular shape in plan view, and has a plurality of ridges and protrusions (not numbered) on the first surface F1 and the second surface F2. Have. The concave stripe and the convex stripe extend in the intersecting direction with respect to the center line extending in the longitudinal direction of the heat transfer portions 20 and 30. Note that the concave stripes and convex stripes shown in FIG. 2 are formed so as to be symmetrically arranged in a region on one end side and a region on the other end side in the short direction perpendicular to the longitudinal direction with respect to the center line. In some cases, the ridges and ridges in the region on one end side in the direction orthogonal to the longitudinal direction are formed continuously with the ridges and ridges in the region on the other end side. That is, the arrangement and pitch of the grooves and protrusions are changed according to various conditions such as the type of fluid to be circulated and the heat exchange efficiency.

  And the heat-transfer part 20 of the 1st heat-transfer plate 2 is provided with opening 22a, 22b, 22c, 22d in four places. That is, in the heat transfer section 20 of the first heat transfer plate 2, the first openings 22a and 22b are provided at two locations, and the second openings 22c and 22d are provided at the other two locations. The arrangement of the first openings 22a, 22b and the second openings 22c, 22d is set in accordance with the arrangement of the first inflow path R1, the first outflow path R2, the second inflow path R3, and the second outflow path R4. That is, the arrangement of the first openings 22a and 22b and the second openings 22c and 22d is determined according to the flow mode of the fluid in the first space A and the second space B.

  In this embodiment, in order to form a trapezoidal flow in each of the first space A and the second space B as the concave stripes and the convex stripes are in the above-described manner, in the heat transfer section 20 of the first heat transfer plate 2. The first openings 22a and 22b are provided at one end side in the short direction at both ends in the longitudinal direction, and the second openings 22c and 22d are provided at the other end side in the short direction at both ends in the longitudinal direction. Is provided.

  In this embodiment, in order to form a trapezoidal flow in the first space A and the second space B, the first openings 22a and 22b and the second openings 22c and 22d are arranged as described above. When the oblique flow is formed in the first space A and the second space B, one of the first openings 22b is arranged at one end side in the longitudinal direction and at one end side in the short direction, The other first opening 22b is disposed on the other end side in the longitudinal direction and on the other end side in the lateral direction. On the other hand, one second opening 22c is provided at the other end side in the longitudinal direction and at the other end side in the short side direction, and the other second opening 22d is provided at one end side in the longitudinal direction. It is provided on one end side in the short direction.

  In the heat transfer portion 20 of the first heat transfer plate 2, the peripheral portions 23a and 23b of the first openings 22a and 22b and the peripheral portions 23c and 23d of the second openings 22c and 22d are formed flat. And the peripheral parts 23a and 23b of the first openings 22a and 22b are displaced to the first surface F1 side of the heat transfer part 20, and the peripheral parts 23c and 23d of the second openings 22c and 22d are the first parts of the heat transfer part 20. It is displaced to the second surface F2.

  The first heat transfer plate 2 includes a support portion 24a formed by extruding a peripheral portion 23a of one first opening 22a that forms the first inflow passage R1, and one second opening 22c that forms the second inflow passage R3. And a support portion 24c formed by extruding the peripheral portion 23c. In addition, the first heat transfer plate 2 according to this embodiment includes a support portion 24b formed by extruding the peripheral portion 23b of the other first opening 22b that forms the first outflow passage R2, and the other portion that forms the second outflow passage R4. And a support portion 24d obtained by extruding the peripheral portion 23d of the second opening 22d. That is, the first heat transfer plate 2 according to the present embodiment includes four peripheral portions 23a, 23b, and 22a, 22b, 22c, and 22d (first openings 22a and 22b and second openings 22c and 22d). Support portions 24a, 24b, 24c, and 24d are provided for 23c and 23d.

  In the first heat transfer plate 2, support portions (hereinafter referred to as first support portions) 24a and 24b formed in the peripheral portions 23a and 23b of the first openings 22a and 22b are formed as shown in FIGS. 6A and 6B. By being pushed out to the second surface F2 side, a concave surface is formed on the first surface F1 side and a convex surface is formed on the second surface F2 side. The first support portions 24a and 24b form open portions 25a and 25b that penetrate the first surface F1 side and the second surface F2 side of the heat transfer portion 20 at the boundary with the surrounding peripheral portions 23a and 23b. ing.

  4, FIG. 6A, FIG. 6B, FIG. 7A, and FIG. 7B show the periphery of one of the first openings 22a and 32a, but the first openings 22a, 22b, 32a, and 32b at two locations are illustrated. Since the periphery of each has a configuration common to each other, the reference numeral indicating the configuration around the other first opening 22b, 32b is assigned to the reference numeral indicating the configuration around the first opening 22a, 32a. These figures are also shown in parallel, and are also used as drawings for illustrating the periphery of the other first openings 22b and 32b. 5, 6C, 6D, 7C, and 7D show the periphery of one of the second openings 22c and 32c, but the second openings 22c, 22d, 32c, and 32d at two locations are illustrated. Since the periphery of each has a configuration common to each other, the reference numeral indicating the configuration around the other second openings 22d and 32d is assigned to the reference numeral indicating the configuration around the other second openings 22c and 32c. These figures are also shown in parallel, and are also used as drawings for illustrating the periphery of the other second openings 22d and 32d.

  In the present embodiment, the open portions 25a and 25b are partially formed around the peripheral portions 23a and 23b of the first openings 22a and 22b of the heat transfer plate 2 (heat transfer portion 20) in order to form the first support portions 24a and 24b. In the extrusion molding (press molding), it is a boundary between the region to be the first support portions 24a and 24b and the peripheral portions 23a and 23b in the periphery thereof, and the radial direction of the first openings 22a and 22b. The boundary extending in the direction intersecting with is partially expanded and pushed apart.

  In the first heat transfer plate 2 of the present embodiment, a plurality of peripheral portions 23a and 23b of the first openings 22a and 22b are spaced apart in the circumferential direction of the first openings 22a and 22b as shown in FIG. First support portions 24a and 24b are provided.

  The plurality of first support portions 24a formed around one first opening 22a that forms the first inflow path R1 is a counterpart first opening (the first outflow path R2 in the peripheral portion 23a of the first opening 22a). Preferably, the first opening 22a is formed in a predetermined region (for example, an arcuate region) on the side of the other first opening 22b. In the present embodiment, the first opening 22a is included so as to include the region. It is arranged all around. Further, the plurality of first support portions 24b formed around the other first opening 22b forming the first outflow path R2 is a counterpart first opening (first first) in the peripheral portion 23b of the other first opening 22b. One first opening forming the inflow channel R1) is preferably formed in a predetermined region (arc-shaped region) on the side of 22a. In the present embodiment, the other first opening is included so as to include the region. It is arrange | positioned throughout the circumference | surroundings of 22b.

  In contrast, in the first heat transfer plate 2 of the present embodiment, support portions (hereinafter referred to as second support portions) 24c and 24d formed on the peripheral portions 23c and 23d of the second openings 22c and 22d are shown in FIG. And as shown to FIG. 6D, while being extruded to the 2nd surface F2 side, while forming the concave surface in the 1st surface F1 side, the convex surface is formed in the 2nd surface F2 side. The second support portions 24c and 24d form open portions 25c and 25d that penetrate the first surface F1 side and the second surface F2 side of the heat transfer portion 20 at the boundary with the surrounding peripheral portions 23c and 23d. ing.

  In the present embodiment, the open portions 25c and 25d arranged around the second openings 22c and 22d also have the second heat transfer plate 2 (heat transfer portion 20) in order to form the second support portions 24c and 24d. When the peripheral portions 23c and 23d of the two openings 22c and 22d are partially extruded (press-molded), the region that becomes the second support portions 24c and 24d and the peripheral portions 23c and 23d in the vicinity thereof The boundary, which extends in the direction intersecting with the radial direction of the second openings 22c and 22d, is formed by being partially divided and expanded.

  In the first heat transfer plate 2 according to the present embodiment, a plurality of peripheral portions 23c, 23d of the second openings 22c, 22d are spaced apart in the circumferential direction of the second openings 22c, 22d as shown in FIG. Second support portions 24c and 24d are provided.

  The plurality of second support portions 24c formed around one second opening 22c that forms the second inflow path R3 is a second opening (second outflow) on the other side in the peripheral portion 23c of the one second opening 22c. Preferably, the second opening 22c is formed in a predetermined region (arc-shaped region) on the side of the other second opening 22d that forms the path R4. In this embodiment, the second opening 22c includes the second region. It is arranged all around.

  The plurality of second support portions 24d formed around the other second opening 22d that forms the second outflow path R4 is the other second opening (the second opening) in the peripheral portion 23d of the other second opening 22d. The second inflow path R3 is preferably formed in a predetermined region (arc-shaped region) on the side of the second opening 22c. In the present embodiment, the other second opening is included so as to include the region. Arranged in the entire area around the opening 22c.

  In the present embodiment, the first support portions 24a, 24b and the second support portions 24c, 24d are spaced apart from each other in the circumferential direction of the openings 22a, 22b, 22c, 22d, as shown in FIGS. 6B and 6D. A pair of arranged leg portions 240a, 240b, 240c, 240d extending to the base end connected to the surrounding peripheral portions 23a, 23b, 23c, 23d and the second surface F2 side of the heat transfer portions 20, 30. A pair of leg portions 240a, 240b, 240c, and 240d having distal ends are provided. The tips of the pair of leg portions 240a, 240b, 240c, 240d are directly or indirectly connected. In the present embodiment, the support portions 24a, 24b, 24c, and 24d further include bridging portions 241a, 241b, 241c, and 241d that connect the tips of the pair of leg portions 240a, 240b, 240c, and 240d.

  In the first support portions 24a and 24b, the pair of leg portions 240a and 240b are arranged at intervals in the circumferential direction of the first openings 22a and 22b, and extend outward from the second surface F2 of the heat transfer portion 20. It is inclined toward the other leg 240a, 240b while taking out. On the other hand, in the second support portions 24c and 24d, the pair of leg portions 240c and 240d are arranged at intervals in the circumferential direction of the second openings 22c and 22d, and are outside from the second surface F2 of the heat transfer portion 20. It inclines toward the leg part 240c, 240d of the other party.

  Thereby, in each of 1st support part 24a, 24b and 2nd support part 24c, 24d, as for a pair of leg part 240a, 240b, 240c, 240d, the space | interval of front-end | tips rather than the space | interval of mutual base ends. It is inclined to narrow. That is, the support portions 24 a, 24 b, 24 c, and 24 d in the first heat transfer plate 2 are formed in a trapezoidal shape that tapers outward from the heat transfer portion 20.

  As shown in FIG. 3, the heat transfer section 30 of the second heat transfer plate 3 is formed in a rectangular shape in plan view, and has a plurality of ridges and protrusions (not numbered) on the first surface F1 and the second surface F2. Have. The ridges and ridges of the second heat transfer plate 3 extend in the intersecting direction with respect to the center line extending in the longitudinal direction of the heat transfer section 30, but the ridges intersect with the ridges of the first heat transfer plate 2. It inclines in the reverse direction with respect to the concave strip and convex strip of the 1st heat exchanger plate 2 so that it may collide. In addition, also about the groove and the protrusion of the 2nd heat-transfer plate 3, the groove and protrusion in the area | region of the one end side of the direction orthogonal to a longitudinal direction are continuous with the groove and protrusion in the area | region of the other end side. Sometimes formed. That is, the arrangement and pitch of the grooves and protrusions are changed according to various conditions such as the type of fluid to be circulated and the heat exchange efficiency.

  And the heat-transfer part 30 of the 2nd heat-transfer plate 3 is provided with opening 32a, 32b, 32c, 32d in four places. That is, in the heat transfer section 30 of the second heat transfer plate 3, the first openings 32a and 32b are provided at two locations, and the second openings 32c and 32d are provided at the other two locations.

  More specifically, in the heat transfer section 30 of the second heat transfer plate 3, the first openings 32 a and 32 b are provided on one end side in the short direction of each of the both ends in the longitudinal direction, and both ends in the longitudinal direction. The second openings 32c and 32d are provided on the other end side in the short direction in each of the above. That is, the first openings 32a and 32b and the second openings 32c and 32d of the second heat transfer plate 3 correspond to the arrangement of the first openings 22a and 22b and the second openings 22c and 22d of the first heat transfer plate 2. Yes.

  In the heat transfer section 30 of the second heat transfer plate 3, the peripheral portions 33a and 33b of the first openings 32a and 32b and the peripheral portions 33c and 33d of the second openings 32c and 32d are formed flat. Then, the peripheral portions 33a and 33b of the first openings 32a and 32b are displaced to the second surface F2 side of the heat transfer unit 30, and the peripheral portions 33c and 33d of the second openings 32c and 32d are the first portions of the heat transfer unit 30. It is displaced to the first surface F1 side.

  The second heat transfer plate 3 includes a support portion 34a formed by extruding a peripheral portion 33a of one first opening 32a that forms the first inflow passage R1, and one second opening 32c that forms the second inflow passage R3. And a support portion 34c formed by extruding the peripheral portion 33c. Further, the second heat transfer plate 3 according to the present embodiment includes a support portion 34b formed by extruding the peripheral portion 33b of the other first opening 32b forming the first outflow passage R2, and the other forming the second outflow passage R4. And a support portion 34d obtained by extruding the peripheral portion 33d of the second opening 32d. That is, the second heat transfer plate 3 according to the present embodiment includes the peripheral portions 33a, 33b, and four peripheral openings 33a, 32b, 32c, and 32d (first openings 32a and 32b and second openings 32c and 32d). Support portions 34a, 34b, 34c, and 34d are provided for 33c and 33d.

  In the second heat transfer plate 3, support portions (hereinafter referred to as third support portions) 34a and 34b formed in the peripheral portions 33a and 33b of the first openings 32a and 32b are formed as shown in FIGS. 7A and 7B. By being pushed out to the one surface F1 side, a concave surface is formed on the second surface F2 side and a convex surface is formed on the first surface F1 side. The third support portions 34a and 34b form open portions 35a and 35b that penetrate the first surface F1 side and the second surface F2 side of the heat transfer unit 30 at the boundary with the surrounding peripheral portions 33a and 33b. ing.

  In the present embodiment, the open portions 35a and 35b formed by the third support portions 34a and 34b are the first openings 32a of the heat transfer plate 3 (heat transfer portion 30) so as to form the third support portions 34a and 34b. When the peripheral portions 33a and 33b of the parts 32b are partially extruded (press-molded), the boundary between the region to be the third support portions 34a and 34b and the peripheral portions 33a and 33b in the vicinity thereof. The boundary extending in the direction intersecting with the radial direction of the first openings 32a and 32b is formed by being partially divided and expanded.

  In the second heat transfer plate 3 of the present embodiment, the peripheral portions 33a and 33b of the first openings 32a and 32b are provided with a plurality of spaces at intervals in the circumferential direction of the first openings 32a and 32b as shown in FIG. Third support portions 34a and 34b are provided.

  The third support portions 34 a and 34 b are disposed so as to be positioned between the plurality of first support portions 24 a and 24 b formed on the first heat transfer plate 2. In the present embodiment, the third support portions 34a, 34b are not in contact with the first support portions 24a, 24b of the first heat transfer plate 2, and the heat transfer portion 20 (first opening 22a) of the first heat transfer plate 2. , 22b and the peripheral portions 23a, 23b).

  In the second heat transfer plate 3, the plurality of third support portions 34a formed around one first opening 32a that forms the first inflow path R1 is the second of the counterparts in the peripheral portion 33a of the first opening 32a. One opening (the other first opening forming the first outflow path R2) 32b is disposed over the entire area around one first opening 32a so as to include a predetermined area (arc-shaped area) on the side. Further, the plurality of third support portions 34b formed around the other first opening 32b forming the first outflow path R2 is the other first opening (the first opening) in the peripheral portion 33b of the other first opening 32b. The first opening 32b is disposed around the other first opening 32b so as to include a predetermined area (arc-shaped area) on the side of the first opening 32a that forms the inflow path R1.

  In contrast, in the second heat transfer plate 3 of the present embodiment, support portions (hereinafter referred to as fourth support portions) 34c and 34d formed on the peripheral portions 33c and 33d of the second openings 32c and 32d are shown in FIG. And as shown to FIG. 7D, while being extruded to the 2nd surface F2 side, while forming the concave surface in the 1st surface F1 side, the convex surface is formed in the 2nd surface F2 side. The fourth support portions 34c and 34d form open portions 35c and 35d that penetrate the first surface F1 side and the second surface F2 side of the heat transfer section 30 at the boundary with the surrounding peripheral portions 33c and 33d. ing.

  In the present embodiment, the second support portions 34c and 34d formed by the fourth support portions 34c and 34d also have the second heat transfer plate 3 (heat transfer portion 30) in order to form the fourth support portions 34c and 34d. When the peripheral portions 33c and 33d of the openings 32c and 32d are partially extrusion-molded (press-molded), at the boundary between the region to be the fourth support portions 34c and 34d and the peripheral portions 33c and 33d in the vicinity thereof. And the boundary extended in the direction which cross | intersects with respect to the radial direction of 2nd opening 32c, 32d is formed by being partly parted and expanded.

  In the second heat transfer plate 3 of the present embodiment, the peripheral portions 33c and 33d of the second openings 32c and 32d have a plurality of spaces spaced apart in the circumferential direction of the second openings 32c and 32d, as shown in FIG. Fourth support portions 34c and 34d are provided. Each of the plurality of fourth support portions 34 c and 34 d is disposed at a position overlapping with each of the plurality of second support portions 24 c and 24 d formed on the first heat transfer plate 2. More specifically, each of the plurality of fourth support portions 34c and 34d is disposed at a position where the second support portion 24c of the first heat transfer plate 2 can be inserted into its concave surface.

  Accordingly, in the second heat transfer plate 3, the fourth support portion 34c formed around the one second opening 32c forming the second inflow passage R3 is opposite to the other side in the peripheral portion 33c of the one second opening 32c. It arrange | positions in the predetermined area | region (arc-shaped area | region) in the 2nd opening (other 2nd opening which forms 2nd outflow path R4) 32d side. In the present embodiment, a plurality of fourth support portions 34c are arranged on the entire periphery of one second opening 32c so as to include a predetermined region. The fourth support portion 34d formed around the other second opening 32d forming the second outflow path R4 is a second opening (second inflow) on the other side in the peripheral portion 33d of the other second opening 32d. One of the second openings forming the path R3 is disposed in a predetermined area (arc-shaped area) on the side of 32c. In the present embodiment, a plurality of fourth support portions 34d are arranged in the entire area around the other second opening 32d so as to include a predetermined region.

  In the present embodiment, the third support portions 34a, 34b and the fourth support portions 34c, 34d are spaced apart from each other in the circumferential direction of the openings 32a, 32b, 32c, 32d, as shown in FIGS. 7B and 7D. A pair of arranged leg portions 340a, 340b, 340c, 340d, the proximal end connected to the surrounding peripheral portions 33a, 33b, 33c, 33d and the first surface F1 side or the second surface of the heat transfer section 30 A pair of leg portions 340a, 340b, 340c, and 340d having tips extending to the F2 side are provided.

  That is, the third support portions 34a and 34b include a pair of leg portions 340a and 340b having tips that extend to the first surface F1 side of the heat transfer portion 30, and the fourth support portions 34c and 34d are heat transfer portions. 30 includes a pair of leg portions 340c and 340d having tips extending to the second surface F2 side. And the front-end | tip of a pair of leg part 340a, 340b, 340c, 340d is connected directly or indirectly. In the present embodiment, the support portions 34a, 34b, 34c, and 34d further include bridging portions 341a, 341b, 341c, and 341d in which the tips of the pair of leg portions 340a, 340b, 340c, and 340d are connected to each other.

  In the third support portions 34 a and 34 b of the second heat transfer plate 3, the pair of leg portions 340 a and 340 b are arranged at intervals in the circumferential direction of the first openings 32 a and 32 b, and the first surface of the heat transfer portion 30. It is inclined toward the other leg 340a, 340b while extending outward from F1. On the other hand, in the fourth support portions 34c and 34d, the pair of leg portions 340c and 340d are arranged at intervals in the circumferential direction of the second openings 22c and 22d, and are outward from the second surface F2 of the heat transfer portion 20. It inclines toward the other leg 340c, 340d while extending toward.

  Thereby, in each of 3rd support part 34a, 34b and 4th support part 34c, 34d, a pair of leg part 340a, 340b, 340c, 340d has the space | interval of front-end | tips rather than the space | interval of mutual base ends. It is inclined to narrow. That is, each of the third support portions 34 a and 34 b and the fourth support portions 34 c and 34 d is formed in a trapezoidal shape that tapers outward from the heat transfer portion 30.

  In the present embodiment, in the fourth support portions 34c and 34d, the distance between the pair of leg portions 340c and 340d is wider than the distance between the pair of leg portions 240c and 240d of the second support portions 24c and 24d. . Thus, the leg portions 240c and 240d of the second support portions 24c and 24d and the fourth support portions 34c and 34d are arranged in a state where the second support portions 24c and 24d are disposed in the concave surfaces of the fourth support portions 34c and 34d. The leg portions 340c and 340d are configured to be spaced apart from each other.

  And the plate type heat exchanger 1 which concerns on this embodiment is so that the heat-transfer part 30 of the 2nd heat-transfer plate 3 may overlap with the heat-transfer part 20 of the 1st heat-transfer plate 2, as shown in FIG.4 and FIG.5. In addition, the first heat transfer plate 2 and the second heat transfer plate 3 are alternately stacked. In this state, the annular portion 21 of the first heat transfer plate 2 and the annular portion 31 of the second heat transfer plate 3 are fitted, and the ridges of the first heat transfer plate 2 (heat transfer portion 20) and the second The protrusions of the heat transfer plate 3 (heat transfer section 30) are in a state of crossing each other. Further, the peripheral portions 23a, 23b, 33a, 33b of the first openings 22a, 22b, 32a, 32b of the adjacent heat transfer plates 2, 3 (first heat transfer plate 2, second heat transfer plate 3) are in close contact with each other. At the same time, the peripheral portions 23c, 23d, 33c, 33d of the second openings 22c, 22d, 32c, 32d of the adjacent heat transfer plates 2, 3 (first heat transfer plate 2, second heat transfer plate 3) are in close contact with each other. .

  This will be described more specifically. As shown in FIG. 4, the peripheral portions 23 a and 23 b of the first openings 22 a and 22 b of the first heat transfer plate 2 are the first heat transfer plates 3 stacked on the first surface F1 side of the heat transfer portion 20. As shown in FIG. 5, the peripheral portions 23c and 23d of the second openings 22c and 22d of the first heat transfer plate 2 are in close contact with the peripheral portions 33a and 33b of the openings 32a and 32b. Close contact with the peripheral portions 33c and 33d of the second openings 32c and 32d of the second heat transfer plate 3 stacked on the side.

  In addition to this, as shown in FIG. 4, the first support portions 24 a and 24 b of the first heat transfer plate 2 are the second heat transfer plates 3 stacked on the second surface F <b> 2 side of the heat transfer portions 20 and 30. The peripheral portions 33a and 33b of the openings 32a and 32b are supported. In the present embodiment, the third support portions 34 a and 34 b of the second heat transfer plate 3 are positioned in the circumferential direction of the first openings 22 a and 22 b with respect to the first support portions 24 a and 24 b of the first heat transfer plate 2. They are offset. Thereby, around the first openings 32a and 32b of the second heat transfer plate 3, the first support portions 24a and 24b are located between the third support portions 34a, 34a, 34b, and 34b (the peripheral portions 33a, 33b) and the third support portions 34a, 34b are in close contact with the heat transfer portion 20 (peripheral portions 23a, 23b) between the first support portions 24a, 24a, 24b, 24b.

  That is, in the present embodiment, the first heat transfer plate 2 and the second heat transfer plate 3 are arranged around the first openings 22a, 32a, 22b, 32b, the first support portions 24a, 24b and the third support portions 34a, By projecting 34b in the opposite direction, the first support portions 24a and 24b and the third support portion are formed in a space formed mutually (a space continuous with the first space A (a space that serves as an inlet or an outlet of the first space A)). 34a and 34b are extended, and these are brought into close contact with the counterpart heat transfer sections 20 and 30 (non-formation positions of the support sections 24a, 24b, 34a and 34b).

  In this embodiment, since each of the first support portions 24a, 24b and the third support portions 34a, 34b includes the bridging portions 240a, 340a, 240b, 340b, the first support portions 24a, 24b and the third support portions 34a, The respective bridging portions 240a, 340a, 240b, 340b of 34b are in close contact with the peripheral portions 23a, 23b, 33a, 33b (non-formation positions of the support portions 24a, 24b, 34a, 34b) of the counterpart heat transfer portions 20, 30. .

  Moreover, in this embodiment, the space | interval of 1st support part 24a, 24b is set wider than the space | interval of a pair of leg part 340a, 340b in 3rd support part 34a, 34b. Accordingly, the leg portions 240a and 240b of the first support portions 24a and 24b and the leg portions 340a and 340b of the third support portions 34a and 34b are arranged at intervals in the circumferential direction of the openings 22a, 22b, 32a, and 32b. Is done. Accordingly, a space formed between the leg portions 240a and 240b of the first support portions 24a and 24b and the leg portions 340a and 340b of the third support portions 34a and 34b, and an open portion formed by the first support portions 24a and 24b. Open portions 35a, 35b formed by 25a, 25b and third support portions 34a, 34b are aligned in a line around the openings 22a, 22b, 32a, 32b.

  Further, as described above, when the first heat transfer plate 2 and the second heat transfer plate 3 are laminated, the second support portions 24c and 24d of the first heat transfer plate 2 are heated as shown in FIG. The peripheral portions 33c and 33d of the second openings 32c and 32d of the second heat transfer plate 3 stacked on the first surface F1 side of the portion 20 are supported. In the present embodiment, the fourth support portions 34c and 34d are disposed at positions overlapping the second support portions 24c and 24d. Thereby, around the second openings 32c and 32d, the second support portions 24c and 24d and the concave surfaces of the fourth support portions 34c and 34d (peripheral portions 33c and 33d of the heat transfer portion 30) are in close contact with each other. Further, the fourth support portions 34c and 34d have second openings 32c of the first heat transfer plate 2 adjacent to the first heat transfer plate 2 on the opposite side to the first heat transfer plate 2 in which the second support portions 24c and 24d are in close contact with the concave surfaces. Close to the peripheral portions 23c and 23d of 32d.

  That is, in the present embodiment, the first heat transfer plate 2 and the second heat transfer plate 3 are arranged around the second openings 22c, 32c, 22d, and 32d, the second support portions 24c and 24d, and the fourth support portions 34c and 34d. Projecting in the same direction, the space formed by the second heat transfer plate 3 (second heat transfer plate 3 to be brazed) and another first heat transfer plate 2 (continuous to the second space B). The second support portions 24c and 24d and the fourth support portions 34c and 34d are extended in a space (a space that serves as an inlet or an outlet of the second space B) and are in close contact with the counterpart heat transfer portions 20 and 30.

  In the present embodiment, since the second support portions 24c, 24d and the fourth support portions 34c, 34d include the bridging portions 240c, 340c, 240d, 340d, the second support portions 24c, 24d, and the fourth support portions 34c, The respective bridge portions 240c, 340c, 240d, and 340d of 34d are in close contact with the peripheral portions 23c, 23d, 33c, and 33d of the counterpart heat transfer portions 20 and 30.

  In the present embodiment, the interval between the pair of leg portions 340c, 340d of the fourth support portions 34c, 34d is set wider than the interval between the pair of leg portions 240c, 240d in the second support portions 24c, 24d. Is done. Accordingly, the leg portions 240c and 240d of the second support portions 24c and 24d and the leg portions 340c and 340d of the fourth support portions 34c and 34d are spaced apart in the circumferential direction of the openings 22c, 22d, 32c, and 32d. Be placed. Accordingly, a space formed between the leg portions 240c and 240d of the second support portions 24c and 24d and the leg portions 340c and 340d of the fourth support portions 34c and 34d, and an open portion formed by the second support portions 24c and 24d. Open portions 35c and 35d formed by 25c and 25d and the fourth support portions 34c and 34d are aligned in a line around the openings 22a, 22b, 32a and 32b.

  In this state, the plurality of heat transfer plates 2 and 3 (first heat transfer plate 2 and second heat transfer plate 3) are integrated by brazing. Thereby, between the annular portions 21 and 31 of the adjacent heat transfer plates 2 and 3, between the peripheral portions 23a, 33a, 23b and 33b of the first openings 22a, 22b, 32a and 32b, and the second openings 22c, 22d and 32c, The peripheral portions 23c, 33c, 23d, and 33d of 32d are sealed, and the contact surfaces of the contact points of the intersecting ridges are connected to each other. In addition, the bridging portions 241a, 341a, 241b, 341b, 241c, 341c, 241d, 341d of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are connected to the other heat transfer portions 20, 30. The

  Accordingly, as shown in FIG. 1, the first space A through which the first fluid flows and the second space B through which the second fluid flows are alternately formed with the heat transfer plates 2 and 3 as a boundary. The first openings 22a, 32a, 22b, 32b are connected in the stacking direction of the heat transfer plates 2, 3 to form the first inflow path R1 and the first outflow path R2 that communicate only with the first space A, and the first A second inflow path R3 and a second outflow path R4 are formed in which the two openings 22c, 32c, 22d, and 32d are continuous in the stacking direction of the heat transfer plates 2 and 3 and communicate only with the second space B. Although not particularly mentioned in the above description, this type of plate heat exchanger 1 includes a pair of frame plates 4 and 5 sandwiching a plurality of stacked heat transfer plates 2 and 3 and brazed. Thus, the pair of frame plates 4 and 5 are also integrated with the heat transfer plates 2 and 3.

  In the plate heat exchanger 1 configured as described above, the first fluid is supplied to the first inflow passage R1 and the second fluid is supplied to the second inflow passage R3. Then, the first fluid flows through the first space A toward the first outflow path R2, and the second fluid flows through the second space B toward the second outflow path R4. As a result, the plate heat exchanger 1 having the above configuration transfers heat between the first fluid flowing through the adjacent first space A and the second fluid flowing through the second space B across the heat transfer plates 2 and 3. Heat is exchanged with each other via the plates 2 and 3.

  And when supplying a 1st fluid or a 2nd fluid, although the fluid pressure (supply pressure) of the fluid may be set to high pressure, the plate type heat exchanger 1 concerning this embodiment is shown in FIG. As shown in FIG. 5, each of the first support portions 24a and 24b, the second support portions 24c and 24d, the third support portions 34a and 34b, and the fourth support portions 34c and 34d is adjacent to each other on both sides. Peripheral portions 23a, 33a, 23b, 33b, 23c, 33c of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d of any one of the heat transfer plates 2, 3 , 23d, 33d is a non-forming position between the support portions 24a, 24b, 24c, 24d, 32a, 32b or a concave surface of the support portions 34c, 34d, and is a space (a space continuous with the first space A, a second space B Continuous with Between the support portions 24a, 24b, 24c, 24d, 32a and 32b, or the concave portions of the support portions 34c and 34d. The support portions 24a, 24b, 24c, 24d in one heat transfer plate 2 are connected to the peripheral portions 33a, 33b, 33c, 33d of the openings 32a, 32b, 32c, 32d of the other heat transfer plate 3 and are adjacent to each other. The support portions 34 a, 34 b, 34 c, 34 c of the other heat transfer plate 3 among the heat transfer plates 2, 3 are connected to the peripheral portions 23 a, 23 b, 23 c, 23 d of the opening of the one heat transfer plate 2.

  Accordingly, the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d of the adjacent heat transfer plates 2 and 3 are supported by each other. 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d support each other, and even if fluid pressure is applied, a bending action with the ridge as a fulcrum is unlikely to occur. Become. Therefore, the damage in the vicinity of the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d of the first openings 22a, 32a, 22b, and 32b and the second openings 22c, 32c, 22d, and 32d is suppressed. Can do.

  Further, in the plate heat exchanger 1 of the present embodiment, adjacent heat transfer plates in a space (inlet or outlet in the first space A or the second space B) that is continuous with the first space A or the second space B. The second and third support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are aligned in the circumferential direction around the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d. .

  As a result, a force that causes fluid pressure to act to separate the adjacent heat transfer plates 2 and 3 (tensile force acting on the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d). Are dispersed in the respective support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d of the adjacent heat transfer plates 2, 3. That is, the supporting portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d of the adjacent heat transfer plates 2 and 3 are opposed to the tensile force. Thereby, even if it does not increase the number of support parts 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d provided in each heat-transfer plate 2, 3, required and sufficient rigidity can be acquired.

  And support part 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d forms a convex surface in the any one surface F1, F2 side of the heat-transfer parts 20 and 30, while the other surface F1. , F2 side is formed with a concave surface, and the first surface F1 side and the second surface F2 of the heat transfer portions 20, 30 at the boundary with the surrounding peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d. Opening portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d that penetrate the side are formed. Accordingly, the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d are arranged in the circumferential direction between the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d, and the open portions 25a, The flow of fluid to the first space A or the second space B is ensured by 35a, 25b, 35b, 25c, 35c, 25d, and 35d.

  And support part 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d is a pair of space | interval arrange | positioned at intervals in the circumferential direction of opening 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d. Legs 240a, 340a, 240b, 340b, 240c, 340c, 240d, 340d, proximal ends and heat transfer portions connected to surrounding peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d 20. A pair of leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, 340d having tips extending to the first surface F1 side or the second surface F2 side of 20, 30, and the pair of leg portions 240a. , 340a, 240b, 340b, 240c, 340c, 240d, 340d are directly or indirectly connected to each other. The front ends of the leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, 340d are between the support portions 24a, 24b, 24c, 24d, 34a, 34b (support portions 24a, 24b, 24c, 24d, 34a, 34b), or the concave surfaces of the support portions 34c and 34d.

  Accordingly, the pair of legs 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d counteract the tensile force even though the single support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are used. Can do. In addition, a space is formed between the pair of leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d so as to be continuous with the open portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d. It is also possible to ensure a smooth flow of fluid.

  In the present embodiment, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d connect the tips of the pair of leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d. The bridge portions 241a, 341a, 241b, 341b, 241c, 341c, 241d, 341d are further provided, and the bridge portions 241a, 341a, 241b, 341b, 241c, 341c, 241d, 341d are supported portions 24a, 24b, 24c, 24d. , 34a, 34b or brazed surfaces of the support portions 34c, 34d.

  Therefore, the joint area of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d with respect to the counterpart heat transfer plates 2, 3 can be increased, and the openings 22a, 32a, 22b of the adjacent heat transfer plates 2, 3 can be obtained. , 32b, 22c, 32c, 22d, and 32d, the connection strength between the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d can be increased.

  In addition, the ends of the pair of leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d are arranged at intervals with the presence of the bridging portions 241a, 341a, 241b, 341b, 241c, 341c, 241d, and 341d Is done. Therefore, it is a space continuous with the open portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d, and is formed between the pair of leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d. Space can be expanded, and smooth fluid flow can be ensured.

  In particular, in the present embodiment, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d have their legs 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d heat-transferred to each other. Openings 22a, 32a, 22b with respect to the leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, 340d of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d of the plates 2, 3 It arrange | positions at intervals in the circumferential direction of 32b, 22c, 32c, 22d, and 32d.

  Thereby, the leg parts 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d of the support parts 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d in the adjacent heat transfer plates 2 and 3 are in close contact with each other. The leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d of the adjacent heat transfer plates 2 and 3 are not provided. It arrange | positions at intervals in the circumferential direction of opening 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d. As a result, not only the open portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d but also the support portions 24a, 34a, 24b, 34b, 24c, 34c, and 24d of the adjacent heat transfer plates 2 and 3, respectively. , 34d communicate with the first space A or the second space B between the leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d, so that smooth fluid flow can be ensured.

  The support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are provided in the peripheral portions 23a, 33a, 23b, and 33b of the openings 22a, 32a, 22b, and 32b that form the inflow channels R1, R3. The openings 22c, 32c, 22d, and 32d on the other side of the openings 22a, 32a, 22b, and 32b that form the inflow paths R1 and R3, and the openings 22c, 32c, 22d, and 32d that form the outflow paths R2 and R4 It is formed in a predetermined area facing the surface. Accordingly, the rigidity of the peripheral portions 23a, 33a, 23b, and 33b of the openings 22a, 32a, 22b, and 32b that are greatly affected by the fluid pressure is increased. In addition, smooth fluid flow is ensured by the open portions 25a, 35a, 25b, and 35b formed by the support portions 22a, 32a, 22b, and 32b.

  And the support parts 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are the peripheral parts 23a, 33a, 23b, 23c, 33c of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d. , 23d, 33d, a plurality of openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d are provided at intervals in the circumferential direction, so that the openings 22a, 32a, The peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d of 22b, 32b, 22c, 32c, 22d, 32d are a plurality of support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d. Support each other at a plurality of locations via Thereby, necessary and sufficient rigidity is obtained around the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d.

  As described above, the plate-type heat exchanger 1 according to the present embodiment has openings of the heat transfer plates 2 and 3 that form the inflow paths R1 and R3 and the outflow paths R2 and R4 while ensuring a smooth flow of fluid. The excellent effect that the rigidity around 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d can be enhanced can be achieved.

  In addition, this invention is not limited to the said embodiment, Of course, it can add suitably in the range which does not deviate from the summary of this invention.

  In the above embodiment, the peripheral portions 23a, 33a of the four openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d provided in the heat transfer portions 20, 30 of the plurality of heat transfer plates 2, 3 The support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are formed on the respective portions 23b, 33b, 23c, 33c, 23d, and 33d, but are not limited thereto. For example, only the support portion 24a is provided only in the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d where the fluid pressure is greatly affected. , 34a, 24b, 34b, 24c, 34c, 24d, 34d may be formed.

  Moreover, in the said embodiment, although opening 22a, 22b, 22c, 22d, 32a, 32b, 32c, 32d was provided in four places of the heat-transfer parts 20 and 30 of the heat-transfer plates 2 and 3, it is not limited to this. . For example, openings may be provided at five or more locations of the heat transfer portions 20 and 30 of the heat transfer plates 2 and 3, and at least one of the first inflow passage R1 and the second inflow passage R3 may be formed two or more. Good. In this case as well, the support portion may be formed in the periphery of each opening, but the openings 22a, 32a, and 22b that form the inflow paths R1, R3 or the outflow paths R2, R4 through which the fluid having a high fluid pressure flows. , 32b, 22c, 32c, 22d, and 32d, the supporting portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are formed only on the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d. May be. In other words, the support portion may be formed around the periphery of at least one of the four or more openings provided in the heat transfer portions 20 and 30 according to the fluid supply pressure.

  In the said embodiment, although support part 24a, 24b, 24c, 24d, 34a, 34b, 34c, 34d was equipped with bridge | crosslinking part 240a, 240b, 240c, 240d, 340a, 340b, 340c, 340d, it is not limited to this. For example, the support portions 24a, 24b, 24c, 24d, 34a, 34b, 34c, 34d include a pair of leg portions 240a, 240b, 240c, 240d, 340a, 340b, 340c, 340d, and the pair of leg portions 240a, The tips of 240b, 240c, 240d, 340a, 340b, 340c, and 340d may be directly connected to each other. Even in this case, the support portions 24a, 24b, 24c, 24d, 34a, 34b, 34c, and 34d are provided with the tips of the pair of leg portions 240a, 240b, 240c, 240d, 340a, 340b, 340c, and 340d connected to each other. On the heat transfer parts 20 and 30 on the mating side (between the support parts 24a, 24b, 24c, 24d, 34a, 34b, 34c and 34d, the concave surfaces of the support parts 24a, 24b, 24c, 24d, 34a, 34b, 34c and 34d) It may be brazed by contact.

  In the said embodiment, although support part 24a, 24b, 24c, 24d, 34a, 34b, 34c, 34d was formed in trapezoid shape, it is not limited to this. For example, the support portions 24a, 24b, 24c, 24d, 34a, 34b, 34c, and 34d may be formed in an arc shape. Even in this case, the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d of the heat transfer portions 20 and 30 that are opposed to each other by the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d. The peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d will support each other, and the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are peripheral portions. The fluid flow is ensured by the open portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d formed between 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d.

  In the above-described embodiment, the openings 22a, 32a, 22b, and the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d Although a plurality of support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are formed on the entire circumference around 32b, 22c, 32c, 22d, and 32d, the present invention is not limited to this. For example, as shown in FIGS. 8 and 9, the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d are opened with respect to the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d. A plurality of support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d may be formed at intervals in the circumferential direction of 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d.

  Further, the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d are provided with a plurality of support portions 24a, 34a, 24b, 34b, 24c. , 34c, 24d, and 34d are formed, for example, on the peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d. One support part 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d may be formed.

  In this case, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are the peripheral portions of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d of the adjacent heat transfer plates 2, 3. 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d support positions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d non-formation positions (openings 22a, 32a, 22b, 32b, 22c, 32c , 22d, 32d in the circumferential direction of the counterpart support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d), or the counterpart support portions 24a, 34a, 24b, 34b, 24c, 34c. 24d and 34d may be brazed.

  In these cases, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are formed as openings 22a, 32a, and 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d. 22b, 32b, 22c, 32c, 22d, 32d peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d, and the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d Are preferably formed in a predetermined area (arc-shaped area) on the side of the other openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d.

  That is, since the fluid flows between the two openings (inflow paths R1, R3, outflow paths R2, R4), the fluid pressure of the fluid flowing through one of the openings (inflow paths R1, R3) is the counterpart opening. It acts greatly on the (outflow passage R2, R4) side. Therefore, the support portion is formed in a predetermined region (arc-shaped region) around the opening in which the support portion is formed and on the opening side (the downstream side in the fluid flow direction) of the opening. Thus, bending of the peripheral portion of the opening due to the action of fluid pressure can be reliably suppressed.

  In the above embodiment, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d are opened from the edges (inner peripheral edges) of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, 32d. 32a, 22b, 32b, 22c, 32c, 22d, 32d is partially divided with respect to the surrounding peripheral parts 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d at one place at a predetermined distance in the radial direction Between the edges (inner peripheral edges) of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d and the dividing positions (opening portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d). Although formed by being extruded, it is not limited to this. For example, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are openings 22a, 22b, and 22c from the edges (inner peripheral edges) of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d. , 22d, 32a, 32b, 32c, 32d are partially divided with respect to the surrounding peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, 33d at two locations separated by a predetermined distance in the radial direction. By being pushed out between the divided positions, the opening portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, and 35d are provided on both sides of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d. It may be formed.

  Further, the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, and 34d are opened from the edges (inner peripheral edges) of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d to the openings 22a, 32a, and 22b. 32b, 22c, 32c, 22d, and 32d are partially divided with respect to the surrounding peripheral portions 23a, 33a, 23b, 33b, 23c, 33c, 23d, and 33d at three or more locations that are separated by a predetermined distance in the radial direction. Between the edges of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d and the dividing position on the side of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d, and two other places Are pushed out in the radial direction of the openings 22a, 32a, 22b, 32b, 22c, 32c, 22d, and 32d. It may be on the form. In these cases also, two or more support portions 24a, 34a, 24b, 34b, 24c, 34c, 24d, 34d arranged in the radial direction are grouped into a set of openings 22a, 32a, 22b, 32b, A plurality of sets may be provided at intervals in the circumferential direction of 22c, 32c, 22d, and 32d.

  Needless to say, in order to reliably block the first space A and the second space B, the formation positions of the open portions 25a, 35a, 25b, 35b, 25c, 35c, 25d, 35d (peripheral portions 23a, 33a). , 23b, 33b, 23c, 33c, 23d, and 33d) is set within a range where the adjacent heat transfer plates 2 and 3 are brazed closely (position where the periphery is brazed). Of course.

  In the above embodiment, the first openings 22a, 32a, 22b, 32b and the second openings 22c, 32c, 22d, 32d are arranged so as to form a trapezoidal flow in the first space A and the second space B. It is not limited to this. For example, the first openings 22a, 32a, 22b, 32b and the second openings 22c, 32c, 22d, 32d may be arranged so as to form an oblique flow in the first space A and the second space B. In this case, the two first openings 22a, 32a, 22b, and 32b are arranged at diagonal positions of the heat transfer sections 20 and 30, and the two second openings 22c, 32c, 22d, and 32d are connected to the heat transfer section 20, It may be arranged at 30 different diagonal positions.

  In the above embodiment, the support portions 24a, 34a, 24b, and 34b around the first openings 22a, 32a, 22b, and 32b (extrusion mode) are changed to the support portions 24c and 34c around the second openings 22c, 32c, 22d, and 32d. , 24d, and 34d (extrusion mode), but is not limited thereto. For example, the support portions 24a, 34a, 24b, and 34b around the first openings 22a, 32a, 22b, and 32b (extrusion mode) may be changed to support portions 24c, 34c, 24d, and the like around the second openings 22c, 32c, 22d, and 32d. You may employ | adopt for the form (extrusion aspect) of 34d. Further, the support portions 24c, 34c, 24d, and 34d around the second openings 22c, 32c, 22d, and 32d (extrusion mode) are changed to support portions 24a, 34a, 24b around the first openings 22a, 32a, 22b, and 32b. You may employ | adopt for the form (extruding aspect) of 34b. However, since the surfaces for bringing the heat transfer plates 2 and 3 into close contact with each other around the first openings 22a, 32a, 22b, and 32b and around the second openings 22c, 32c, 22d, and 32d, as described above, the support portion 24a , 24b, 24c, 24c, 34a, 34b, 34c, 35d, it is needless to say that the first heat transfer plate 2 and the second heat transfer plate 3 are switched in form.

  In the above embodiment, the leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24c, and 35d of the adjacent heat transfer plates 2 and 3 are mutually connected. However, the present invention is not limited to this. For example, the leg portions 240a, 340a, 240b, 340b, 240c, 340c, 240d, and 340d of the support portions 24a, 34a, 24b, 34b, 24c, 34c, 24c, and 35d of the adjacent heat transfer plates 2 and 3 are in close contact with each other. May be.

  In the above embodiment, the pair of frame plates 4 and 5 are provided. However, the frame plates 4 and 5 may be provided as necessary.

  DESCRIPTION OF SYMBOLS 1 ... Plate type heat exchanger, 2 ... 1st heat transfer plate (heat transfer plate), 3 ... 2nd heat transfer plate (heat transfer plate), 4, 5 ... Frame plate, 20, 30 ... Heat transfer part, 21 , 31 ... annular portion, 22a, 22b, 32a, 32b ... first opening (opening), 22c, 22d, 32c, 32d ... second opening (opening), 23a, 23b, 23c, 23d, 33a, 33b, 33c, 33d ... peripheral part, 24a, 24b ... first support part (support part), 24c, 24d ... second support part (support part), 34a, 34b ... third support part (support part), 34c, 34d ... fourth Support part (support part), 25a, 25b, 25c, 25d, 35a, 35b, 35c, 35d ... open part, 240a, 240b, 240c, 240d, 340a, 340b, 340c, 340d ... leg part, 241a, 241b 241c, 241d, 341a, 341b, 341c, 341d ... Bridged portion, A ... first space, B ... second space, F1 ... first surface, F2 ... second surface, R1 ... first inflow channel (inflow channel) , R2 ... first outflow path (outflow path), R3 ... second inflow path (inflow path), R4 ... second outflow path (outflow path)

Claims (6)

  A heat transfer section in which a plurality of ridges and ridges are formed on both the front and back surfaces, and includes a plurality of heat transfer plates having heat transfer sections provided with openings at least at four locations, and each heat transfer section is stacked. The first space through which the first fluid is circulated and the second space through which the second fluid is circulated alternately by each heat transfer section by brazing in a state where a plurality of heat transfer plates are laminated so as to match In addition, the first inflow passage and the first outflow passage in which each of the two openings out of the four places are connected to the first space continuously in the stacking direction of the heat transfer plates are formed. In addition, the plate-type heat exchange in which each of the remaining two openings of the four places is formed in a second inflow path and a second outflow path that communicate with only the second space in the stacking direction of the heat transfer plates. Next to each other in a stacked state Each of the heat plates is a support part that extrudes the peripheral part of the corresponding opening that forms at least one of the first inflow path, the second inflow path, the first outflow path, and the second outflow path. In addition, a convex surface is formed on one surface side of the heat transfer portion, while a concave surface is formed on the other surface side, and one surface side and the other of the heat transfer portion at the boundary with the surrounding peripheral portion One or more support portions that form an open portion that penetrates the surface of the heat transfer plate, and the peripheral portion of the opening of each heat transfer plate is one of the two heat transfer plates adjacent on both sides. A space continuous with either the first space or the second space is formed between the peripheral portion of the opening of the heat plate, and the support portion of each heat transfer plate is formed by the two heat transfer plates adjacent on both sides. The non-formation position of the support portion or the peripheral portion of the opening of one of the heat transfer plates A concave support section, plate heat exchanger, characterized in that it is brazed to the concave surface of the non-formation position or support portion of the support portion in the space.   The support part is a pair of leg parts arranged at intervals in the circumferential direction of the opening, and extends to one surface side or the other surface side of the proximal end and the heat transfer part connected to the peripheral part of the periphery. A pair of leg portions having distal ends, the distal ends of the pair of leg portions are directly or indirectly connected, and at least the distal end side of the leg portions is brazed to the non-formation position of the support portion or the concave surface of the support portion The plate heat exchanger according to claim 1.   The plate-type heat according to claim 2, wherein the support portion further includes a bridging portion that connects the tips of the pair of leg portions, and the bridging portion is brazed to a non-forming position of the support portion or a concave surface of the support portion. Exchanger.   The plate-type heat exchanger according to claim 2 or 3, wherein the support portion is arranged with a space in the circumferential direction of the opening with respect to the leg portion of the support portion of the counterpart heat transfer plate. .   The support portion is provided in a peripheral portion of the opening that forms at least one of the first inflow passage and the second inflow passage, and is a counterpart of the opening that forms at least one of the first inflow passage and the second inflow passage. The plate-type heat exchanger according to any one of claims 1 to 4, wherein the plate-type heat exchanger is formed in a predetermined region that is an opening and faces an opening that forms at least one of the first outflow path and the second outflow path. .   The plate-type heat exchanger according to any one of claims 1 to 5, wherein a plurality of support portions are provided at intervals in the circumferential direction of the opening.

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