JP5713040B2 - Combined heat exchanger - Google Patents

Description

  The present invention relates to a composite heat exchanger mounted on an automobile.

  Conventionally, composite heat exchangers installed in automobiles include main radiators that cool engine cooling water, and water cooling for heavy electrical equipment (such as electric drive sources and in-vehicle electrical equipment such as inverters) installed in vehicles. A sub-radiator for cooling the cooling water, a water-cooling condenser for exchanging heat between the water-cooling cooling water flowing out from the sub-radiator and the air-conditioning refrigerant, and an air-cooling condenser for cooling the air-conditioning refrigerant flowing out from the water-cooling condenser There is something with.

  An example of a water-cooled condenser used in this type of composite heat exchanger will be described with reference to FIG. 13 (see, for example, Patent Document 1). As shown in FIG. 13, the water-cooled condenser 110 uses the water-cooling cooling water heat-exchanged by the sub-radiator 120 to cool the air-conditioning refrigerant before flowing into the air-cooled condenser 130. It is provided on the side tank side.

  Specifically, the water-cooling cooling water cooled by the sub-radiator 120 exchanges heat with the air-conditioning refrigerant before flowing into the air-cooling condenser 130, and then flows into the high-voltage equipment 140. On the other hand, the air-conditioning refrigerant circulating in the refrigeration cycle first flows into the water-cooled condenser 110 from the compressor and then flows out into the air-cooled condenser 130. Thereby, the air-conditioning refrigerant until it flows into the air-cooling condenser 130 can be efficiently cooled.

JP 2010-127508 A

  However, in the conventional combined heat exchanger 100 described above, the water-cooling cooling water that has been cooled by passing through the sub-radiator 120 can cool the high-temperature and high-pressure air-conditioning refrigerant before flowing into the air-cooling condenser 130. Heat exchange with the air conditioning refrigerant causes the temperature to rise. For this reason, there is a possibility that the water-cooling cooling water whose temperature has risen flows into the high-power equipment 140 and the high-power equipment cannot be efficiently cooled.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a composite heat exchanger that can efficiently cool high-voltage equipment while cooling the air-conditioning refrigerant before flowing into the air-cooled condenser. With the goal.

In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that the first heat exchanger that cools the first refrigerant that passes through the high-voltage equipment, the upper side or the lower side of the first heat exchanger, A combined heat exchanger comprising a second heat exchanger that cools different second refrigerants, and a third heat exchanger that exchanges heat between the first refrigerant and the second refrigerant, wherein the first heat exchange The first refrigerant cooled by the cooler passes through the high-power equipment, passes through the third heat exchanger, flows into the first heat exchanger, and is cooled by the third heat exchanger. The second refrigerant further includes a fourth heat exchanger provided on the downstream side of the cooling air flowing into the second heat exchanger and passing through the first heat exchanger and the second heat exchanger, The fourth inflow side tank of the fourth heat exchanger includes a first inflow side tank of the first heat exchanger and a second inflow side of the second heat exchanger. An inflow / outflow tank is fixed in close proximity, and a fourth outflow side tank of the fourth heat exchanger includes a first outflow side tank of the first heat exchanger and a second turn of the second heat exchanger. It is characterized in that the tank is fixed in close proximity .

As another feature, the width of the fourth heat exchanger is preferably equal to the width of the first heat exchanger and the second heat exchanger.
As another feature, it is preferable that the first refrigerant passing through the first heat exchanger flows in the same direction as the second refrigerant passing through the second heat exchanger.

  As another feature, the first heat exchanger and the second heat exchanger each have a fixed portion, and the fourth heat exchanger has a fixed portion to which the respective fixed portions are fixed. Is preferred.

  As another feature, it is preferable that the third heat exchanger is provided in a first inflow side tank of the first heat exchanger.

  As another feature, the refrigerant inlet of the first heat exchanger, the refrigerant inlet of the second heat exchanger, and the refrigerant inlet of the fourth heat exchanger are on the same side with respect to the core portion of the fourth heat exchanger. It is preferable to arrange in.

  According to the characteristics of the present invention, since the first refrigerant cooled by the first heat exchanger flows directly to the high voltage equipment, the high voltage equipment can be efficiently cooled. In addition, the second refrigerant can be cooled by the first refrigerant before flowing into the first heat exchanger. As described above, the high-voltage equipment can be efficiently cooled while cooling the air-conditioning refrigerant before flowing into the air-cooled condenser.

FIG. 1 is an overall perspective view showing a composite heat exchanger according to the present embodiment. FIG. 2 is a front view showing the composite heat exchanger according to the present embodiment. FIG. 3 is a configuration diagram illustrating a heat exchange system to which the composite heat exchanger according to the present embodiment is applied. FIG. 4 is an exploded perspective view showing the inflow side tank and the water-cooled condenser of the sub-radiator according to the present embodiment. FIG. 5 is an enlarged exploded perspective view showing the water-cooled condenser according to the present embodiment. FIG. 6 is a cross-sectional view showing the vicinity of the inflow side tank of the sub-radiator according to the present embodiment and the inflow side tank of the air cooling condenser. FIG. 7 is a perspective view showing the vicinity of the inflow side tank of the sub-radiator according to the present embodiment and the inflow side tank of the air-cooled condenser. Fig.8 (a) is a perspective view which shows the assembly process of the composite heat exchanger which concerns on this embodiment, FIG.8 (b) is the side view. FIG. 9A is a perspective view showing the composite heat exchanger according to the present embodiment after assembly, and FIG. 9B is a side view thereof. FIG. 10A is a schematic diagram showing the flow of the cooling water for water cooling and the refrigerant for air conditioning of the composite heat exchanger according to the comparative example, and FIG. 10B is the composite heat exchanger according to the comparative example. It is a schematic diagram which shows the temperature of the cooling water for water cooling, and the refrigerant | coolant for an air conditioning. Fig.11 (a) is a schematic diagram which shows the flow of the cooling water for water cooling and the refrigerant | coolant for an air conditioning of the composite heat exchanger which concerns on this embodiment, FIG.11 (b) is the composite heat | fever which concerns on this embodiment. It is a schematic diagram which shows the temperature of the cooling water for water cooling of an exchanger, and the refrigerant | coolant for an air conditioning. FIG. 12A is a graph showing a temperature state of cooling water for water cooling of the composite heat exchanger according to the comparative example, and FIG. 12B is for water cooling of the composite heat exchanger according to the present embodiment. It is a graph which shows the temperature condition of a cooling water. FIG. 13 is a configuration diagram showing a part of a heat exchange system to which a composite heat exchanger according to the background art is applied.

  Next, an embodiment of a composite heat exchanger according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(Configuration of combined heat exchanger)
First, the configuration of the composite heat exchanger 1 according to the present embodiment will be described with reference to the drawings. FIG. 1 is an overall perspective view showing a composite heat exchanger 1 according to the present embodiment. FIG. 2 is a front view showing the composite heat exchanger 1 according to the present embodiment. FIG. 3 is a configuration diagram showing a heat exchange system to which the composite heat exchanger 1 according to the present embodiment is applied. 4-7 is a figure which shows the vicinity of the outflow side tank 22 of the sub radiator 20 which concerns on this embodiment. Note that the composite heat exchanger 1 is used for a hybrid electric vehicle (HEV) equipped with an electric drive source or other electric equipment, for example, an in-vehicle equipment such as an inverter, in addition to an engine. .

  The composite heat exchanger 1 includes a main radiator 10 (see FIGS. 3, 8, and 9) as a fourth heat exchanger, a sub-radiator 20 as a first heat exchanger, and water cooling as a third heat exchanger. A condenser 30 and an air-cooled condenser 40 as a second heat exchanger are provided. The composite heat exchanger 1 cools the evaporator unlike the water-cooling cooling water and the water-cooling cooling water as the first refrigerant that cools the high-powered equipment 3 such as the electric drive source and the in-vehicle electric equipment such as the inverter. Heat exchange is performed with the air-conditioning refrigerant as the second refrigerant, and the heat-exchanged first refrigerant is caused to flow into the sub-radiator 20, and the heat-exchanged air-conditioning refrigerant is caused to flow into the air-cooling condenser 40.

  Specifically, as shown in FIG. 3, the main radiator 10 cools engine coolant for the engine 2 circulated by the pump 5. The main radiator 10 is provided on the downstream side of the cooling air passing through the sub radiator 20 and the air cooling condenser 40 and on the upstream side of the cooling air of the motor fan 4. The main radiator 10 includes a plurality of radiator tubes 11 that exchange heat with cooling air that passes through and flows outside the engine cooling water, and a radiator tank (hereinafter referred to as a radiator tank) that is connected to both ends of the plurality of radiator tubes 11. Inflow side tank 12 (fourth inflow side tank) and outflow side tank 13 (fourth outflow side tank)) (see FIGS. 8 and 9). The width of the main radiator 10 is almost the same as the width of the sub radiator 20 and the air-cooled condenser 40 (see FIGS. 8 and 9).

  The sub-radiator 20 cools the cooling water for water cooling for the high-voltage equipment 3 (such as an electric drive source and an in-vehicle electric equipment such as an inverter) circulated by the pump 6. Note that the sub-radiator 20 does not necessarily need to be the high-power system device 3 such as an electric drive source or an in-vehicle electric device such as an inverter, and may cool a refrigerant used for a water-cooled charge air cooler (water-cooled CAC), for example.

  As shown in FIGS. 1 to 3, the sub-radiator 20 is disposed on the upstream surface side of the cooling air of the main radiator 10 and in the upper region. The sub-radiator 20 includes a plurality of sub-radio tubes 21 that exchange heat with cooling air that passes through the outside of the water-cooling cooling water, and sub-radius tanks that are connected to both ends of the sub-radio tubes 21. Hereinafter, an inflow side tank 23 (first inflow side tank) and an outflow side tank 22 (first outflow side tank) are provided.

  The inflow side tank 23 and the outflow side tank 22 are provided with substantially L-shaped fixing claws 23f and 22f as fixing portions. The inflow side tank 23 is formed with an inflow portion 23in (coolant inlet) into which the cooling water for water cooling flows. On the other hand, the outflow side tank 22 is formed with an outflow portion 22out through which cooling water for water cooling flows out.

  As shown in FIG. 4, the inflow side tank 23 is provided with an accommodating chamber 23 </ b> A having a rectangular cross section in which the water-cooled condenser 30 is accommodated. In the present embodiment, the storage chamber 23A has been described as having a rectangular cross-sectional shape. However, the present invention is not limited to this, and for example, a circular shape may be used, and the shape may be arbitrarily set.

  An upper insertion opening 23A1 through which the water-cooled condenser 30 is inserted is provided above the accommodation chamber 23A. As shown in FIGS. 4 to 6, a step portion 23 </ b> B in which an O-ring 34 (to be described later) of the water-cooled condenser 30 is disposed is formed on the periphery of the upper insertion opening 23 </ b> A <b> 1. A mounting portion 23T to which a cap 36 (to be described later) of the water-cooled condenser 30 is mounted is provided around the upper insertion opening 23A1. The mounting portion 23T is provided with a guide portion 23C that guides the rotation of a cap 36 (to be described later) of the water-cooled condenser 30 to the lock position.

  A lower support opening 23A2 formed at a position facing the upper insertion opening 23A1 is provided below the accommodation chamber 23A. The lower support opening 23A2 is formed by a cylindrical tube portion, and a refrigerant outflow portion 38, which will be described later, of the water-cooled condenser 30 is inserted therein.

  The water cooling condenser 30 performs heat exchange between the water cooling cooling water before flowing into the sub-radiator 20 and the air conditioning refrigerant before flowing into the air cooling condenser 40. As shown in FIG. 4, the water-cooled condenser 30 is accommodated in the outflow side tank 22 of the sub-radiator 20, and the water-cooled condenser 30 and the air-cooled condenser 40 are connected in series in the refrigeration cycle with the water-cooled condenser 30 upstream. Yes. Details of the water-cooled condenser 30 will be described later.

  The air-cooled condenser 40 cools the air-conditioning refrigerant that flows out of the water-cooled condenser 30. As shown in FIGS. 1 to 3, the air-cooling condenser 40 is disposed on the upstream surface side of the cooling air of the main radiator 10 and in the lower region of the sub-radiator 20. The air-cooling condenser 40 is disposed on substantially the same plane as the sub-radiator 20 along a direction orthogonal to the flow of cooling air. The air-cooling condenser 40 includes an air-cooling tube 41 that exchanges heat with cooling air that passes through the outside of the air-conditioning refrigerant and an air-cooling tank (hereinafter referred to as an inflow / outflow tank) to which both ends of the air-cooling tube 41 are connected. 42 (second inflow / outflow tank) and liquid side tank 43 (second turn tank)).

  The inflow / outflow tank 42 and the liquid side tank 43 are provided with substantially L-shaped fixing claws 42f and 43f as fixing portions. The inflow / outflow tank 42 has an inflow portion 42A (refrigerant inlet) into which air-conditioning refrigerant before heat exchange with the air-cooling condenser 40 flows, and an outflow from which air-conditioning refrigerant after heat exchange with the air-cooling condenser 40 flows out. A portion 42B is formed.

  The inflow portion 42 </ b> A and the outflow portion 42 </ b> B are provided at positions separated from the longitudinal direction of the inflow / outflow tank 42. A relay pipe 50 communicating with the inflow / outflow tank 42 is connected to the inflow portion 42A (see FIGS. 1 to 2 and FIG. 7). One end of the relay pipe 50 is connected to a later-described refrigerant outflow portion 38 of the water-cooled condenser 30, and the other end of the relay pipe 50 is connected to the inflow / outflow tank 42.

  At the side of the liquid side tank 43, a liquid tank 60 for separating the air-conditioning refrigerant into gas and liquid is provided (FIGS. 1 and 2). The liquid refrigerant (air conditioning refrigerant) flowing out from the liquid tank 60 passes through the lower region of the air cooling tube 41 and flows out from the outflow portion 42B.

(Configuration of water-cooled condenser)
Next, the configuration of the above-described water-cooled condenser 30 will be described with reference to FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, the water-cooled condenser 30 inserted from the upper insertion opening 23A1 has a position between the upper insertion opening 23A1 and a position of the lower support opening 23A2 different from the upper insertion opening 23A1. It is fixed to the inflow side tank 23 at two places.

  Specifically, the water-cooled condenser 30 includes a plurality of water-cooled tubes 31, a pair of water-cooled tanks 32 and 33, an O-ring 34, a disk-shaped sealing plate 35, a cap 36, a pair of refrigerant inflow portions 37, and A refrigerant outlet 38 and two shaft seals 39 are provided.

  Each water cooling tube 31 exchanges heat between the air-conditioning refrigerant passing through the inside and the water-cooling cooling water passing through the inflow side tank 23 on the outside thereof. Each water cooling tube 31 is provided between a pair of water cooling tanks 32 and 33. Each water cooling tube 31 is formed by extrusion molding.

  The water cooling tanks 32 and 33 are connected to both ends of each water cooling tube 31, respectively. The water cooling tanks 32 and 33 are mounted on the inner plates 32A and 33A in which fitting holes 32A1 and 33A1 into which both ends of the water cooling tubes 31 are fitted, and the inner plates 32A and 33A, respectively, and the air conditioning refrigerant passes therethrough. It is comprised by the outer side plates 32B and 33B in which possible refrigerant | coolant passage parts 32B1 and 33B1 were formed.

  The O-ring 34 is disposed in a step portion 23 </ b> B (see FIGS. 5 to 7) formed on the upper surface of the inflow side tank 23. A sealing plate 35 is disposed above the O-ring 34.

  The sealing plate 35 contacts the periphery of the upper insertion opening 23A1 of the inflow side tank 23 on the upper side of the O-ring 34 and closes the upper insertion opening 23A1, thereby allowing water cooling cooling water to pass through the inflow side tank 23. Prevents the outflow. The sealing plate 35 is provided with a refrigerant passage hole 35A that is fixed to the refrigerant inflow portion 37 and through which the air conditioning refrigerant passes, and a bead portion 35B that protrudes toward the cap 36 and extends along the circumferential direction. A cap 36 is mounted on the upper surface of the inflow side tank 23 so as to press the sealing plate 35 toward the O-ring 34.

  The cap 36 has a claw portion 36 </ b> A that rotates along the guide portion 23 </ b> C (see FIGS. 5 and 6) formed on the outer peripheral surface of the upper portion of the inflow side tank 23 and is locked at the lock position. The cap 36 is attached to the inflow side tank 23 to fix the water-cooled condenser 30 to the inflow side tank 23.

  The refrigerant inflow portion 37 and the refrigerant outflow portion 38 are fixed to the water cooling tanks 32 and 33, respectively, and are provided at positions (upper surface and lower surface) of the inflow side tank 23 facing each other.

  Specifically, the refrigerant inflow portion 37 is an inlet through which the air-conditioning refrigerant flows into the water-cooled condenser 30, and is fixed to the upper outer plate 32B (the peripheral surface of the refrigerant passage portion 32B1) with the sealing plate 35 interposed therebetween. The Then, one side (upper side) of the water cooling condenser 30 provided with the refrigerant inflow portion 37 and the water cooling tank 32 described above is fixed at the position of the upper insertion opening 23A1, and the refrigerant inflow portion 37 is fixed to the upper insertion opening 23A1. Exposed outside.

  On the other hand, the refrigerant outflow portion 38 is an outlet through which the air-conditioning refrigerant flows out to the water-cooled condenser 30, and is fixed to the lower outer plate 33B (the peripheral surface of the refrigerant passage portion 33B1). The refrigerant outflow portion 38 is formed by a cylindrical tube portion, and is disposed on the inner periphery of the cylindrical lower support opening portion 23 </ b> A <b> 2 in the inflow side tank 23 of the sub radiator 20. The other side (lower side) of the water cooling condenser 30 provided with the refrigerant outflow portion 38 and the above-described water cooling tank 33 is fixed at a position of the lower support opening 23A2 different from the upper insertion opening 23A1. The portion 38 is exposed to the outside of the lower support opening 23A2. The exposed refrigerant outflow portion 38 is connected to an inflow / outflow tank 42 through a relay pipe 50.

  A shaft seal groove 38A into which the shaft seal 39 is inserted is formed on the outer periphery of the refrigerant outflow portion 38. The refrigerant outflow portion 38 is inserted into and supported by the lower support opening 23A2.

  The shaft seal 39 is inserted into the shaft seal groove 38A of the refrigerant outflow portion 38, so that the outer periphery of the lower support opening 23A2 and the lower support are supported with the refrigerant outflow portion 38 penetrating through the lower support opening 23A2. It is interposed between the inner periphery of the opening 23A2.

(Assembly of combined heat exchanger)
Next, the assembly of the composite heat exchanger 1 described above will be described with reference to FIGS. Fig.8 (a) is a perspective view which shows the assembly process of the composite heat exchanger 1 which concerns on this embodiment, FIG.8 (b) is the side view. FIG. 9A is a perspective view showing the assembled heat exchanger 1 according to the present embodiment after assembly, and FIG. 9B is a side view thereof.

  First, the water-cooled condenser 30 is accommodated in the inflow side tank 23 of the sub-radiator 20, and the air-cooled condenser 40 is attached to the lower side of the sub-radiator 20 to obtain an assembly 70. Then, as shown in FIGS. 8 and 9, the assembly 70 is mounted on the main radiator 10.

  Here, when the assembly 70 is assembled to the main radiator 10, as shown in FIGS. 8 and 9, the sub-radiator 20 is provided on the inflow side tank 12 side where the inflow portion 12 A (refrigerant inlet) of the main radiator 10 is provided. The inflow side tank 23 and the inflow / outflow tank 42 of the air-cooling condenser 40 are fixed close to each other, and the outflow side tank 22 of the sub radiator 20 and the liquid side tank 43 of the air cooling condenser 40 are disposed on the outflow side tank 13 side of the main radiator 10. Fix in close proximity. That is, the inflow portion 23in in the inflow side tank 23 of the sub-radiator 20, the inflow portion 42A in the inflow / outflow tank 42 of the air cooling condenser 40, and the inflow portion 12A in the inflow side tank 12 of the main radiator 10 are the core portion of the main radiator 10 ( It is arranged on the same side with respect to the central portion.

  At this time, the fixing portions formed in the inflow side tank 23 and the outflow side tank 22 on the fixed portions 12a and 13a (see FIG. 8) provided in the inflow side tank 12 and the outflow side tank 13 of the main radiator 10 respectively. The claws 23f and 22f and the fixing claws 42f and 43f formed in the inflow / outflow tank 42 and the liquid side tank 43 are inserted. As a result, the assembly 70 is mounted on the main radiator 10 and the assembly of the composite heat exchanger 1 is completed.

(Refrigerant flow)
Next, the flow of each refrigerant in the composite heat exchanger 1 described above will be described with reference to FIG.

  As shown in FIG. 3, the water-cooling cooling water for cooling the high-voltage equipment 3 is cooled by the sub-radiator 20. The water-cooling cooling water cooled by the sub-radiator 20 passes through the high-voltage equipment 3, passes through the water-cooling condenser 30, and flows into the sub-radiator 20 to be cooled.

  On the other hand, the high-temperature and high-pressure air-conditioning refrigerant by the compressor (compressor) 8 in the refrigeration cycle first flows into the water-cooled condenser 30 and is heat-exchanged with the water-cooled cooling water to be cooled. After that, the air-conditioning refrigerant cooled by the water-cooled condenser 30 flows into the air-cooled condenser 40, and heat exchange is performed by the air-cooled condenser 40, and then flows out to the evaporator.

(Comparison evaluation)
Next, comparative evaluation between the composite heat exchanger 100 as a comparative example and the composite heat exchanger 1 of the present embodiment described above will be described with reference to FIGS. FIG. 10A is a schematic diagram showing the flow of the cooling water for water cooling and the air conditioning refrigerant of the composite heat exchanger 100 according to the comparative example, and FIG. 10B is the composite heat exchange according to the comparative example. It is a schematic diagram which shows the temperature of the cooling water for water cooling of the container 100, and the refrigerant | coolant for an air conditioning. Fig.11 (a) is a schematic diagram which shows the flow of the cooling water for water cooling and the refrigerant | coolant for an air conditioning of the composite heat exchanger 1 which concerns on this embodiment, FIG.11 (b) is the composite_type | mold which concerns on this embodiment. It is a schematic diagram which shows the temperature of the cooling water for water cooling of the heat exchanger 1, and the refrigerant | coolant for an air conditioning.

  Fig.12 (a) is a graph which shows the temperature condition of the cooling water for water cooling of the composite heat exchanger 100 which concerns on a comparative example, FIG.12 (b) is the composite heat exchanger 1 which concerns on this embodiment. It is a graph which shows the temperature condition of the cooling water for water cooling. In addition, about the cooling water temperature of the graph of FIG. 12, the mere value as a standard is shown and, of course, it differs from actual temperature.

  Here, when the composite heat exchanger 100 according to the comparative example and the composite heat exchanger 1 according to the present embodiment are compared, the flow of the cooling water for water cooling that has passed through the water cooling condenser is different. Specifically, in the composite heat exchanger 100 according to the comparative example, the water-cooled condenser 110 is provided in the outflow side tank of the sub radiator 120 (see FIG. 13). Then, the water cooling water cooled by the sub-radiator 120 passes through the water cooling condenser 110 and then flows into the high voltage equipment 140. On the other hand, the air-conditioning refrigerant from the compressor flows into the water-cooled condenser 110 and is cooled by heat exchange with the water-cooled cooling water, and then flows into the air-cooled condenser 130.

  As shown in FIGS. 10A and 10B, in the composite heat exchanger 100 according to the comparative example, the water-cooling cooling water that passes through the sub-radiator flows in a different direction from the air-conditioning refrigerant that passes through the air-cooling condenser 40. ing. In this case, the water-cooling cooling water cooled by the sub-radiator 20 is close to the air-conditioning refrigerant before being cooled by the air-cooling condenser, so that the temperature is likely to rise.

  In addition, as shown in FIG. 12A, the cooling water for water cooling (water temperature “3” at point a) cooled by the sub-radiator 20 is a high-temperature and high-pressure refrigerant by a compressor (compressor) 8. When the water-cooled condenser 30 passes through, the temperature rises. The cooling water for water cooling (the water temperature at point b “4.25”) that has risen in temperature flows into the high-voltage equipment 3.

  On the other hand, as shown in FIGS. 11A and 11B, in the composite heat exchanger 1, the cooling water for water cooling that passes through the sub-radiator 20 has the same direction as the refrigerant for air conditioning that passes through the air cooling condenser 40. Is flowing. In this case, the water-cooling cooling water cooled by the sub radiator 20 is separated from the high-temperature and high-pressure air-conditioning refrigerant before being cooled by the air-cooling condenser 40, and therefore, the temperature is less likely to rise than the comparative example.

  In addition, as shown in FIG. 12B, the water cooling water cooled by the sub-radiator 20 (the water temperature “3” at the point c) is compared with the water temperature “4.25” at the point b, It flows into the high-voltage equipment 3 in a state where the water temperature is low. Even in this case, the air-conditioning refrigerant before being cooled by the air-cooled condenser 40 can be cooled by passing through the water-cooled condenser 30.

(Action / Effect)
In the present embodiment described above, the cooling water for water cooling that has been cooled by the sub-radiator 20 flows directly to the high-voltage equipment 3, so that the high-voltage equipment 3 can be efficiently cooled. Further, the air-conditioning refrigerant can also be cooled by the water-cooling cooling water before flowing into the air-cooling condenser 40. As described above, the high-voltage equipment 3 can be efficiently cooled while cooling the air-conditioning refrigerant before flowing into the air-cooling condenser 40.

  In the present embodiment, the cooling water for water cooling that passes through the sub-radiator 20 flows in the same direction as the refrigerant for air conditioning that passes through the air-cooling condenser 40, so that the mutual heat effects of the cooling water for water cooling and the refrigerant for air conditioning are reduced. It can be made as small as possible, and the high-voltage equipment 3 can be cooled more efficiently.

  In the present embodiment, the width of the main radiator 10 is substantially equal to the widths of the sub-radiator 20 and the air-cooled condenser 40, and the water-cooled condenser 30 is provided in the inflow side tank 23 of the sub-radiator 20, thereby improving the layout. Excellent.

  In this embodiment, the inflow side tank 23 of the sub-radiator 20 and the inflow / outflow tank 42 of the air cooling condenser 40 are arranged close to the inflow side tank 12 side of the main radiator 10, and are disposed on the outflow side tank 13 side of the main radiator 10. The outflow side tank 22 of the sub-radiator 20 and the liquid side tank 43 of the air cooling condenser 40 are arranged close to each other. Thereby, the mutual heat influence of the engine cooling water, the water cooling cooling water, and the air conditioning refrigerant can be reduced as much as possible, and the heat exchange efficiency of the sub-radiator 20 can be further increased.

  In particular, the inflow portion 23in in the inflow side tank 23 of the sub-radiator 20, the inflow portion 42A in the inflow / outflow tank 42 of the air cooling condenser 40 and the inflow portion 12A in the inflow side tank 12 of the main radiator 10 are the core portion of the main radiator 10 ( It is arranged on the same side with respect to the central portion. Thereby, the mutual heat influence of the engine cooling water, the water cooling cooling water, and the air conditioning refrigerant can be reduced as much as possible, and the heat exchange efficiency of the main radiator 10, the sub radiator 20, and the air cooling condenser 40 can be further increased.

  In the present embodiment, fixing claws 23f and 22f are formed on the inflow side tank 23 and the outflow side tank 22, and fixing claws 42f and 43f are formed on the inflow / outflow tank 42 and the liquid side tank 43, respectively. Fixed portions 12 a and 13 a to be fixed are provided in each of the inflow side tank 12 and the outflow side tank 13 of the main radiator 10. Thus, the assembly 70 (the sub-radiator 20, the water-cooled condenser 30 and the air-cooled condenser 40) can be easily assembled to the main radiator 10 only by inserting the fixing claws 23f, 22f, 42f and 43f into the fixed parts 12a and 13a. This improves the layout.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. Specifically, the composite heat exchanger 1 has been described as being used for a hybrid electric vehicle (HEV) in which an electric drive source or other electric device, for example, a high-power device such as an inverter, is mounted in addition to the engine. However, the present invention is not limited to this, and may be another automobile (for example, an electric car (EV)).

  In addition, the sub radiator 20 and the air cooling condenser 40 have been described as being disposed on substantially the same plane along the direction orthogonal to the flow of the cooling air, but the present invention is not limited to this, and is slightly shifted. It may be arranged.

  Moreover, although the sub radiator 20 was demonstrated as what is arrange | positioned above the air-cooling capacitor | condenser 40, it is not limited to this, The air-cooling capacitor | condenser 40 may be arrange | positioned above the sub-radiator 20. FIG.

  Moreover, although the cooling water for water cooling which passes the sub radiator 20 demonstrated as what flows in the same direction as the refrigerant | coolant for air conditioning which passes the air-cooling condenser 40, it is not limited to this, The air conditioning which passes the air-cooling condenser 40 It may flow in a different direction from the refrigerant for use.

  Further, the third heat exchanger has been described as being the water-cooled condenser 30, but is not limited thereto, and may be a water-cooled condenser or an oil cooler other than the embodiment. That is, it goes without saying that the water-cooled condenser 30 described in the embodiment is merely an example. For example, the water-cooled tube 31 does not necessarily have to be formed by extrusion molding, and an inner fin tube or a tube having a refrigerant passage. Or a tube.

  Moreover, although the water-cooled condenser 30 was demonstrated as what is accommodated in the inflow side tank 23 of the sub-radiator 20, it is not limited to this, You may attach to the circumference | surroundings of the inflow side tank 23. .

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 ... Composite type heat exchanger 3 ... Strong electric equipment 10 ... Main radiator (4th heat exchanger)
12 ... Inflow side tank (4th inflow side tank)
12A ... Inflow part 13 ... Outflow side tank (4th outflow side tank)
12a, 13a ... Fixed portion 20 ... Sub-radiator (first heat exchanger)
22 ... Outflow side tank (first outflow side tank)
23. Inflow side tank (first inflow side tank)
23 in. Inflow part (refrigerant entrance)
23f, 22f ... Claw for fixing (fixing part)
30 ... Water-cooled condenser (third heat exchanger)
40 ... Air-cooled condenser (second heat exchanger)
42 ... Inflow / outflow tank (second inflow / outflow tank)
42A ... Inflow part (refrigerant entrance)
43 ... Liquid side tank (2nd turn tank)
42f, 43f ... Claw for fixing (fixing part)
50 ... Relay piping 60 ... Liquid tank 70 ... Assembly

Claims (6)

A first heat exchanger (20) that cools the first refrigerant that passes through the high-power system device (3), and a first heat exchanger (20) that is disposed above or below the first heat exchanger (20) and that is different from the first refrigerant. 2 is a composite heat exchanger (1) comprising a second heat exchanger (40) for cooling the refrigerant and a third heat exchanger (30) for exchanging heat between the first refrigerant and the second refrigerant. And
The first refrigerant cooled by the first heat exchanger (20) passes through the high-voltage equipment (3) and then passes through the third heat exchanger (30) to pass through the first heat exchanger. Flow into
The second refrigerant cooled by the third heat exchanger (30) flows into the second heat exchanger (40) ,
A fourth heat exchanger (10) provided downstream of the cooling air passing through the first heat exchanger (20) and the second heat exchanger (40);
The fourth inflow side tank (12) of the fourth heat exchanger (10) includes the first inflow side tank (23) of the first heat exchanger (20) and the second heat exchanger (40). The second inflow / outflow tank (42) in close proximity,
The fourth outflow side tank (13) of the fourth heat exchanger (10) includes a first outflow side tank (22) of the first heat exchanger (20) and the second heat exchanger (40). A combined heat exchanger (1) characterized in that the second turn tank (43) is fixed in close proximity . A composite heat exchanger (1) according to claim 1,
The width of the fourth heat exchanger (10), said first heat exchanger (20) and a composite type heat exchanger, characterized in width equal der Rukoto of the second heat exchanger (40) ( 1). A composite heat exchanger (1) according to claim 1 or claim 2,
It said first heat exchanger (20) the first refrigerant passing through the composite heat exchanger according to claim flows Rukoto the second refrigerant in the same direction passing through the second heat exchanger (40) (1). A claim 1 compound type heat exchanger according to claim 3 (1),
Before Symbol first heat exchanger (20)及 beauty the second heat exchanger (40), possess the fixed part (22f, 23f, 42f, 43f) and,
The fourth heat exchanger (10), the respective fixing portions (22f, 23f, 42f, 43f) is a composite type heat exchanger, characterized in Rukoto of having a fixed portion (12a, 13a) which are respectively fixed Vessel (1). A claim 1 compound type heat exchanger according to claim 4 (1),
It said third heat exchanger (30), the composite heat exchanger according to claim Rukoto provided in the first inlet-side tank (23) in said first heat exchanger (20) (1). A composite heat exchanger (1) according to any one of claims 1 to 5,
Refrigerant inlet before Symbol first heat exchanger (20) (23in), a refrigerant inlet (12A) of the refrigerant inlet of the second heat exchanger (40) (42A) and said fourth heat exchanger (10), composite type heat exchanger, characterized that you placed on the same side of the core portion of the fourth heat exchanger (10) (1).

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