JPH11294989A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the assembling work of tubes while decreasing the number of components by eliminating a plate constructing a tank. SOLUTION: Bulge parts 31 of specified area are formed at specified positions at the opposite ends of each tube 3 and stacked to constitute a closed plate constructing tanks 2a, 2b. This structure eliminates the need of an independent plate and since the bulge parts 31 are integrated with tubes 3, alignment thereof can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a heat exchanger used for a radiator, a condenser or the like.

[0002]

2. Description of the Related Art Generally, a heat exchanger used for a radiator or the like includes a pair of tanks which are erected at a predetermined interval as disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 51-119652. The fins include tubes that are stacked along the tank and communicate between the tanks, and are formed by brazing at least the fins and the tubes. Also, recently, all parts, for example, parts constituting a tank, etc. are made of aluminum alloy so that they can be integrally brazed in a furnace.

[0003]

However, among the components constituting the tank, those located on the tube side are those that close the tube side of the tank and into which the tube is inserted and fixed. A plate having a plurality of insertion holes is used. This plate is preferably manufactured integrally with the other part constituting the tank, but is formed as a separate member to facilitate the formation of the tube insertion hole. Further, in the heat exchanger having the above-described configuration, at the time of temporary assembly, it is necessary to perform a positioning operation between the tube inserted into the insertion hole formed in the plate and the tank. Occurs.

[0004] Therefore, an object of the present invention is to provide a heat exchanger that eliminates the plate constituting the tank, reduces the number of parts, and facilitates the work of assembling the tubes.

[0005]

Therefore, a heat exchanger according to the present invention comprises an aluminum alloy, a pair of tanks erected at predetermined intervals, and an aluminum alloy coated with a brazing material. In a heat exchanger composed of a plurality of tubes communicating between a pair of tanks and fins made of an aluminum alloy and interposed between the tubes, at least a predetermined area around both ends of the tubes at predetermined positions. A substantially rectangular bulge portion having
The tank is constituted by a tank member having a substantially U-shaped cross section in which both ends in the longitudinal direction are closed, and a closing plate portion for closing a tube-side opening portion of the tank member, and the closing plate portion is laminated. In that it consists of a bulge of a tube.

Therefore, according to the present invention, bulges having a predetermined area are formed at predetermined positions on both ends of each tube so as to protrude, and the bulges are laminated to form a closing plate forming a tank. Therefore, it is not necessary to specially manufacture the plate, and since the bulge portion is integrated with the tube, the positioning between the tank and the tube can be easily performed, thereby achieving the above object.

Further, in the present invention, both ends in the longitudinal direction of the closing plate may be abutted and joined to grooves formed inside a tube side opening of the tank member. Further, the tank member may be abutted and joined to an end of the tube-side opening portion of the tank member. Thereby, the positioning between the tube and the tank can be more easily performed.

Further, in the present invention, of the plurality of tubes to be laminated, a portion located at a distal end side from a bulge portion of a tube at a predetermined position is brought into contact with and joined to the entire inner peripheral wall of the tank. It is preferable that a partition wall portion that divides the inner space be formed, and that the partition wall portion have an opening that communicates one of the tank space divided by the partition wall portion and the inside of the tube. By arranging a tube having a partition wall at one end at a predetermined position, the inside of the tank can be partitioned into a predetermined space, so that a plurality of heat exchanger paths can be easily formed. is there.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

A heat exchanger 1 shown in FIG. 1 is formed of an aluminum alloy, and is used for a radiator and a condenser. A pair of tanks 2a and 2b are provided at a predetermined interval. And a plurality of tubes 3 stacked along the tanks 2a and 2b and communicating between the tanks 2a and 2b, and corrugated fins 4 interposed between the tubes 3. Both ends of the tube 3 and the fin 4 in the stacking direction are:
It is clamped and fixed by the side plate 5. The tank 2a is provided with an inflow pipe 10 into which the heat exchange medium flows, and the tank 2b is provided with an outflow pipe 11 from which the heat exchanger flows. Thereby, the inflow pipe 10
Heat exchange medium (refrigerant in the case of a condenser, engine cooling water in the case of a radiator) flowing through the tube 3 from the tank 2a to the tube 2b, and the outflow pipe 1
The tube 3 is sent to the next step.
When passing through the fins 4, the heat of the heat exchange medium is released to the air passing through the fins 4 via the fins 4.

As shown in FIG. 2, the tanks 2a and 2b include a tank member 20 having a U-shaped cross section,
And a closing plate portion 21 that closes an opening along the longitudinal direction of the zero. In this embodiment, the openings at both ends in the longitudinal direction of the tanks 2a and 2b are closed by the side plates 5.

The tube 3 is made of a clad material in which a brazing material is clad. As shown in FIGS. 2 and 3, a bulge portion protrudingly formed on the tube periphery at a position having a predetermined distance L1 from both ends thereof. 31.

The bulge portion 31 is formed by bulging. Specifically, the bulge portion is formed by temporarily enlarging the tip of the tube using a mold and then reducing the tip so as to leave the enlarged portion. It is.

The bulge portion 31 formed as described above
At the time of laminating the tubes 3, the step 2 formed along the longitudinal direction of the tube-side opening of the tank member 20.
The bulge portion 31 is fixed to the stepped portion 2 by being fixed to the stepped portion 2.
2 can accurately set the tube insertion dimension L1 with respect to the dimension L in the tube insertion direction of the internal space 23 of the tanks 2a and 2b, so that the tank internal space 23 can be set appropriately. It is.

Further, since the bulge portion 31 can be easily assembled to the tank member 20 and the operation of inserting the tube into the insertion hole is eliminated, the operation of temporarily assembling the heat exchanger 1 can be simplified. is there.

Hereinafter, other embodiments of the present invention will be described. The same portions or portions exhibiting the same effects are denoted by the same reference numerals, and description thereof will be omitted. In the second embodiment shown in FIG. 4, the tube 3 is connected to the bulge portion 31 of the tube 3 and the both side edges 33 of the distal end portion 32.
And the inner side surface 24 of the tank member 20 is abutted and joined. As a result, the mechanical strength of the tube end can be improved, so that breakage or the like due to a moment acting on the tube is reliably prevented.

The third embodiment shown in FIG. 5 and FIG.
The bulge portion 31 is brought into contact with and joined to the tube-side tip portion 25 of the tank member 20. Since the step 22 described above need not be formed, the tank member 20 can be easily formed. can do. However, since it is necessary to position the tube 3 in the short direction, both side edges 33 of the portion 32 located on the distal end side from the bulge portion 31 of the tube 3 as in the above-described second embodiment are connected to the tank 3. It is preferable that positioning in the short direction can also be performed as a contact with the inner side surface 24 of the member 20.

A heat exchanger 1A shown in FIG. 7 is made of an aluminum alloy and is used for a radiator or a condenser, similarly to the above-described heat exchanger 1, and is used at a predetermined interval. A pair of tanks 2a,
2b and a plurality of tubes 3 stacked along the tanks 2a and 2b and communicating between the tanks 2a and 2b.
And a corrugated fin 4 interposed between the tubes 3. Both ends of the tube 3 and the fin 4 in the stacking direction are sandwiched and fixed by a side plate 5. The tank 2a is provided with an inflow pipe 10 into which the heat exchange medium flows.
Is provided with an outflow pipe 11 from which the heat exchanger flows out. In this embodiment, the tube 3 may be any of the tubes shown in FIGS. 3, 4, and 6.

The tank 2a is divided into first and third tank interior spaces 13a and 13c by a partition wall portion 12a, and the tank 2b is further divided by a partition wall portion 12b.
(It is divided into second and fourth tank spaces 13b and 13d. The first tank space 13a communicates with the inflow pipe 10 and the fourth tank space 13d communicates with the outflow pipe 11. This allows the inflow port 10
Heat exchange medium flowing from the first tank space 13a
Through the tube 3 to the second tank space 13b, from the second tank space 13b to the third tank space 13c through the tube 3 and further to the third tank space 13c. A one-and-a-half reciprocating pass (three passes) from the tube 3 to the fourth in-tank space 13d via the tube 3 is sent out from the outflow pipe 11 to the next step.

In the heat exchanger 1A having the above-described structure, the partition walls 12a and 12b are shown in FIGS. 8 to 10, and a portion of the tube 3A on the tip side from the bulge portion 31 is connected to the tube of the tank member 20. Confronting side (inner confronting side)
26 and the space 23 inside the tanks 2a and 2b.
Is divided into first and third in-tank spaces 13a and 13c and second and fourth in-tank spaces 13b and 13d.
Reference numerals 4 and 35 are abutted and joined to the inner side surfaces 24 and 26 of the tank member 20. The partition walls 12a and 12b are formed with an opening 50 that communicates with the inside of the tube 3A and one of the tank spaces divided by the partition walls 12a and 12b, so that one of the tank spaces communicates with the tube 3. It is something like that. Tube end 3
5 and the inner confronting surface 26 of the tank member 20 are abutted and joined, so that the pressure applied to the partition walls 12a and 12b can be held by the bulge 31 and the tube tip peripheral edges 34 and 35.

FIGS. 11 to 14 show modified examples of the partition walls 12a and 12b. FIG.
The second embodiment of the partition wall shown in FIG.
The side of the bulge 31 side is formed in a circular shape.
4 and 26, the partition wall portions 12a, 1
2b and the holding force against the pressure applied by the heat exchange medium in the tank space is improved.

In the third embodiment of the partition wall shown in FIG. 12, the opening 50B is formed so as to be shifted from the tube end 35 by a predetermined position so that the tube end 35 is not cut out. The mechanical strength of the tube end 35 is improved. In this embodiment, the opening 50C has a rectangular shape.

In the fourth embodiment of the partition wall shown in FIG. 13, the opening 50C is formed in a circular shape. Therefore, the strength of the partition walls 12a and 12b can be further improved as compared with the case of a rectangular shape.

Further, in the fifth embodiment of the partition wall shown in FIG. 14, the opening 50D is formed in an oval shape, and the effect of the fourth embodiment shown in FIG. 13 is maintained. In addition, the opening area is ensured.

According to the above configuration, the tank is divided by the partition wall unit integrated with the tube.
By simply interposing the tube 3A having the partition wall portion at a predetermined position when stacking the tubes, a heat exchanger having a plurality of passes can be constituted without providing a special partition wall. Note that the partition wall portion 1 shown in FIGS.
In the heat exchanger using the tubes 2a and 12b, the ordinary tubes may be any of the tubes shown in FIGS. 3, 4, and 6.

[0026]

As described above, according to the present invention, a bulge portion is formed on a tube, and the bulge portion is laminated to constitute a part of the tank. A plate in which an insertion hole is formed can be deleted, and the tube can be positioned only by joining the bulge part to other parts constituting the tank, so that the number of parts and the number of work steps can be reduced. It is.

Further, by providing a tube in which the partition wall is integrally formed, the space in the tank can be divided simply by disposing the tube having the partition wall at a predetermined position when the tubes are stacked. Therefore, a plurality of paths can be easily set.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a one-pass heat exchanger according to an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing a mounted state of a tank and a tube according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged sectional view showing a mounted state of a tank and a tube according to the first embodiment of the present invention.

FIG. 4 is a partially enlarged sectional view showing a mounted state of a tank and a tube according to a second embodiment of the present invention.

FIG. 5 is a partially enlarged perspective view showing a mounted state of a tank and a tube according to a third embodiment of the present invention.

FIG. 6 is a partially enlarged sectional view showing a mounted state of a tank and a tube according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram showing a configuration of a three-pass heat exchanger according to the embodiment of the present invention.

FIG. 8 is a partially enlarged sectional view showing a mounted state of a tube having a partition wall and a tank.

FIG. 9 is a partially enlarged cross-sectional view showing a state near a partition wall.

FIG. 10 is a partially enlarged perspective view showing the first embodiment of the partition wall.

FIG. 11 is a partially enlarged perspective view showing a second embodiment of the partition wall.

FIG. 12 is a partially enlarged perspective view showing a third embodiment of a partition wall portion.

FIG. 13 is a partially enlarged perspective view showing a fourth embodiment of a partition wall portion.

FIG. 14 is a partially enlarged perspective view showing a fifth embodiment of the partition wall.

[Explanation of symbols]

 1, 1A Heat exchanger 2a, 2b Tank 3, 3A tube 4 Fin 12a, 12b Partition wall 20 Tank member 31 Bulge 50, 50A, 50B, 50C, 50D Opening

Claims (4)

[Claims] 1. A pair of tanks made of an aluminum alloy and erected at predetermined intervals, a plurality of tubes made of an aluminum alloy coated with a brazing material, and communicating between the pair of tanks, And a fin interposed between the tubes, wherein at least a substantially rectangular bulge portion having a predetermined area is protrudingly formed at predetermined positions around both ends of the tube. The tank is constituted by a tank member having a substantially U-shaped cross section in which both ends in the longitudinal direction are closed, and a closing plate portion for closing a tube-side opening portion of the tank member, wherein the closing plate portion is laminated. A heat exchanger comprising a tube bulge. 2. The container according to claim 1, wherein both ends in the longitudinal direction of the closing plate portion are in contact with grooves formed inside a tube-side opening portion of the tank member. Heat exchanger. 3. The heat exchanger according to claim 1, wherein both ends of the closing plate portion along the longitudinal direction are abutted and joined to ends of a tube-side opening portion of the tank member. 4. The plurality of tubes to be stacked,
The portion of the tube located at a predetermined position from the bulge portion to the distal end side forms a partition wall portion that abuts and joins the entire tank inner peripheral wall to divide the tank internal space, and the partition wall portion is 4. The heat exchanger according to claim 1, further comprising an opening communicating with one of the inner space of the tank divided by the partition wall and the inside of the tube.