JP2014173747A - Complex type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a complex type heat exchanger capable of efficiently cooling a high electrical current type appliance while cooling air-conditioning coolant before the same flowing into an air-cooled condenser.SOLUTION: A complex type heat exchanger 1 comprises: a sub-radiator 20 which cools cooling water passing through a high electrical current type appliance 3; an air-cooled condenser 40 which cools an air-conditioning coolant different from the cooling water; and a water-cooled condenser 30 which exchanges heat between the cooling water and the air-conditioning coolant. The sub-radiator 20 has a first heat exchange section 20A and a second heat exchange section 20B. The cooling water cooled by the first exchange section 20A exchanges the heat with the air-conditioning coolant in the water-cooled condenser 30. The cooling water which exchanges the heat inside the water-cooled condenser 30 exchanges the heat in the second heat exchange section 20B. Then the cooling water which exchanges the heat in the second heat exchange section 20B is used for cooling the high electrical current type appliance 3.

Description

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

  Conventionally, composite heat exchangers mounted on automobiles include main radiators that cool engine cooling water, and water cooling for heavy electrical equipment mounted on vehicles (such as on-board electrical equipment such as electric drive sources and inverters). 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. 14 (see, for example, Patent Document 1). As shown in FIG. 14, the water-cooled condenser 110 uses the water-cooling cooling water heat-exchanged by the sub-radiator 120 to flow out the sub-radiator 120 in order 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 a first heat exchanger that cools a first refrigerant that passes through a high-power device, a second heat exchanger that cools a second refrigerant different from the first refrigerant, A combined heat exchanger comprising a third heat exchanger for exchanging heat between the first refrigerant and the second refrigerant, wherein the first refrigerant cooled by the first heat exchanging section is the third heat The first refrigerant that exchanges heat with the second refrigerant in the exchanger and exchanges heat with the third heat exchanger exchanges heat with the second heat exchange unit, and exchanges heat with the second heat exchange unit. The gist of the first refrigerant is used for cooling in-vehicle devices.

  As another feature, the first heat exchange unit is provided above or below the second heat exchange unit, and the first refrigerant cooled by the first heat exchange unit is the third heat exchanger. It is preferable to flow into the second heat exchange section via

  As another feature, the second heat exchanger is disposed adjacent to the second heat exchange unit, and the first refrigerant passing through the second heat exchange unit passes through the second heat exchanger. It is preferable to flow in the same direction as the second refrigerant.

  As another feature, the second heat exchanger is disposed adjacent to the first heat exchange unit, and is disposed at a position away from the second heat exchanger with the first heat exchange unit interposed therebetween. It is preferable.

  As another feature, the first heat exchange part is provided on the upper side or the lower side of the second heat exchange part, and the first heat exchanger is provided on the side where the first refrigerant flows in and out. An inflow / outflow tank; and a U-turn tank that allows the first refrigerant that has flowed out of the first heat exchange section to flow into the second heat exchange section, and the third heat exchanger is disposed in the U-turn tank. It is preferable to be provided.

  As another feature, the apparatus further includes a fourth heat exchanger provided on the downstream side of the cooling air passing through the first heat exchanger and the second heat exchanger, and the width of the fourth heat exchanger is It is preferable that the width is equal to the width of the first heat exchanger and the second heat exchanger.

  As another feature, the first inflow side tank of the first heat exchanger and the second inflow / outflow tank of the second heat exchanger are adjacent to the fourth inflow side tank of the fourth heat exchanger. The first outflow side tank of the first heat exchanger and the second turn tank of the second heat exchanger are arranged close to the fourth outflow side tank of the fourth heat exchanger. It is preferable to do.

  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.

  According to the feature of the present invention, since the first refrigerant cooled in the second heat exchange part of the first heat exchanger flows directly to the high-power equipment, the high-power equipment can be efficiently cooled. Further, the second refrigerant can also be cooled by the first refrigerant cooled by the first heat exchange part of 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 U-turn tank of the sub-radiator and the inflow side tank of the air-cooled condenser according to the present embodiment. FIG. 7 is a perspective view showing the vicinity of the U-turn tank of the sub-radiator and the inflow side tank of the air-cooled condenser according to the present embodiment. 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 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 a composite heat exchange according to the present embodiment. It is a schematic diagram which shows the flow of the cooling water for water cooling of an apparatus, and the refrigerant | coolant for an air conditioning. Fig.11 (a) is a graph which shows the temperature condition of the cooling water for water cooling of the composite heat exchanger which concerns on a comparative example, FIG.11 (b) is for water cooling of the composite heat exchanger which concerns on this embodiment. It is a graph which shows the temperature condition of a cooling water. FIG. 12 is a schematic view seen from the plane (upper surface) of the composite heat exchanger according to the present embodiment. FIG. 13 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 1 according to the modified example. FIG. 14 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 to 7 are views showing the vicinity of the U-turn tank 23 of the sub-radiator 20 according to the present 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. In the composite heat exchanger 1, water-cooling cooling water as a first refrigerant for cooling the high-powered equipment 3 such as an electric drive source and an in-vehicle electric device such as an inverter is different from the water-cooling cooling water. The air-conditioning refrigerant is heat-exchanged, 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 and outflow side tank 13) (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 cooling water for water cooling for the high-powered 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 first heat exchange unit 20A and a second heat exchange unit 20B. Also, a plurality of sub-radio tubes 21 that exchange heat with the cooling air that flows through the outside through which the cooling water for water cooling passes, and sub-radio tanks (hereinafter referred to as inflows) to which both ends of the plurality of sub-radio tubes 21 are connected. An outflow tank 22 and a U-turn tank 23).

  The first heat exchange unit 20 </ b> A constitutes an upper region of the plurality of sub-radio tubes 21. As shown in FIG. 3, the cooling water for water cooling that passes through the first heat exchange unit 20 </ b> A flows from the inflow / outflow tank 22 toward the U-turn tank 23. The cooling water for water cooling cooled by the first heat exchange unit 20 </ b> A exchanges heat with the water cooling condenser 30 in the U-turn tank 23.

  The second heat exchange unit 20B is provided on the lower side of the first heat exchange unit 20A, and constitutes a lower region of the plurality of sub-radio tubes 21. As shown in FIG. 3, the cooling water for water cooling that passes through the second heat exchange unit 20 </ b> B flows from the U-turn tank 23 toward the inflow / outflow tank 22. The cooling water for water cooling cooled by the second heat exchange unit 20B is used for the high-voltage equipment 3.

  The inflow / outflow tank 22 and the U-turn tank 23 are provided with substantially L-shaped fixing claws 22f and 23f as fixing portions. The inflow / outflow tank 22 is provided on the side where the cooling water for water cooling flows in and out, and an inflow portion 22in where the cooling water for water cooling flows in and an outflow portion 22out where the cooling water for water cooling flows out are formed. Yes.

  The U-turn tank 23 causes the cooling water for water cooling that has flowed out of the first heat exchange unit 20A to flow into the second heat exchange unit 20B. As shown in FIG. 4, the U-turn tank 23 is provided with a storage chamber 23 </ b> A having a rectangular cross section in which the water-cooled condenser 30 is stored. 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-cooled condenser 30 performs heat exchange between the water-cooled cooling water cooled by the first heat exchange unit 20 </ b> A and the air-conditioning refrigerant before flowing into the air-cooled condenser 40. As shown in FIG. 4, the water-cooled condenser 30 is accommodated in the U-turn tank 23 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 (second heat exchange unit 20 </ b> B). The air-cooling condenser 40 is disposed adjacent to the lower side of the second heat exchange unit 20B on the substantially same plane as the sub-radiator 20 along a direction orthogonal to the flow of the 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 and a liquid side tank 43).

  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 into which air-conditioning refrigerant before heat exchange with the air-cooling condenser 40 flows, and an outflow portion 42B into which air-conditioning refrigerant after heat exchange with the air-cooling condenser 40 flows out. 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 U-turn 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 U-turn 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 U-turn tank 23. A sealing plate 35 is disposed above the O-ring 34.

  The sealing plate 35 is on the upper side of the O-ring 34 and abuts the periphery of the upper insertion opening 23A1 of the U-turn tank 23 to close the upper insertion opening 23A1, thereby allowing water cooling cooling water to pass through the U-turn 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 attached to the upper surface of the U-turn 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 a guide portion 23 </ b> C (see FIGS. 5 and 6) formed on the outer peripheral surface of the upper portion of the U-turn tank 23 and is locked at the lock position. The cap 36 is attached to the U-turn tank 23 to fix the water-cooled condenser 30 to the U-turn 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 U-turn 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 of a cylindrical tube portion, and is disposed on the inner periphery of the cylindrical lower support opening 23A2 in the U-turn 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 U-turn 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.

When the assembly 70 is assembled to the main radiator 10, as shown in FIGS. 8 and 9, the inflow / outflow tank 22 of the sub radiator 20 and the air cooling are provided on the inflow side tank 12 side where the inflow portion 12A of the main radiator 10 is provided. The inflow / outflow tank 42 of the condenser 40 is fixed in proximity, and the U-turn tank 23 of the sub-radiator 20 and the liquid side tank 43 of the air-cooling condenser 40 are fixed in proximity to the outflow side tank 13 side of the main radiator 10. That is, the inflow portion 22 in of the inflow / outflow tank 22 of the sub radiator 20, the inflow portion 42 A of the inflow / outflow tank 42 of the air cooling condenser 40, and the inflow portion 12 A of the inflow side tank 12 of the main radiator 10 are the core portion of the main radiator 10. It is arrange | positioned on the same side with respect to (center part).

  The fixing 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 are fixed to the inflow / outflow tank 22 and the U-turn tank 23, respectively. The claws 22f and 23f 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. Specifically, the cooling water for water cooling for cooling the high-voltage equipment 3 is circulated in the order of the first heat exchange unit 20A, the water cooling condenser 30 and the second heat exchange unit 20B. That is, the cooling water for water cooling cooled by the first heat exchange unit 20A exchanges heat with the refrigerant for air conditioning in the water cooling condenser 30, and the cooling water for water cooling exchanged in the water cooling condenser 30 becomes the second heat exchange part. The water-cooling cooling water that has been heat-exchanged at 20B and heat-exchanged by the second heat-exchange unit 20B is used for cooling the high-voltage equipment 3 as the in-vehicle equipment.

  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. 10 and 11. Fig.10 (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 100 which concerns on a comparative example, FIG.10 (b) is the composite heat based on this embodiment. It is a schematic diagram which shows the flow of the cooling water for water cooling of the exchanger 1, and the refrigerant | coolant for an air conditioning. Fig.11 (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.11 (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. 11, 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 a simple outflow side tank of the sub-radiator 120 (see FIG. 14). 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 FIG. 10A, in the composite heat exchanger 100 according to the comparative example, the cooling water for water cooling that passes through the sub-radiator flows in a different direction from the refrigerant for air conditioning that passes through the air cooling condenser 40. 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. 11A, the cooling water for cooling water (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 FIG. 10B, in the composite heat exchanger 1, the cooling water for water cooling that passes through the second heat exchange unit 20 </ b> B disposed on the upper side of the air cooling condenser 40 is the air cooling condenser 40. It flows in the same direction as the air-conditioning refrigerant that passes through. In this case, the water-cooling cooling water cooled by the second heat exchange unit 20B is separated from the high-temperature and high-pressure air-conditioning refrigerant before being cooled by the air-cooling condenser 40, so that the temperature is less likely to rise than the comparative example.

  In addition, as shown in FIG. 11 (b), the cooling water for water cooling (water temperature “1.75” at point c) cooled by the first heat exchange unit 20 </ b> A increases in temperature by passing through the water cooling condenser 30. To do. This water-cooling cooling water having the increased temperature (water temperature “3.25” at point d) is cooled by the second heat exchange unit 20B. This cooled cooling water for water cooling (water temperature “2.25” at point e) flows into the high-voltage equipment 3 in a state where the water temperature is lower than the water temperature “4.25” at point b. . 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 cooled by the second heat exchange unit 20B of the sub-radiator 20 flows directly to the high-voltage equipment 3, so that the high-voltage equipment 3 can be efficiently cooled. In addition, the air-conditioning refrigerant can also be cooled by the water-cooling cooling water cooled by the first heat exchange unit 20A of the sub-radiator 20. 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 first heat exchange unit 20A and the second heat exchange unit are provided by providing the first heat exchange unit 20A on the upper side of the second heat exchange unit 20B (that is, provided on one sub-radiator 20). Compared with the case where each of 20B is an independent individual sub-radiator, the layout is excellent.

  In particular, since the inflow portion 22in and the outflow portion 22out are formed in the inflow / outflow tank 22, as shown in FIG. 12, the high-voltage equipment 3 (for example, an electric drive source and others) is provided on the inflow / outflow tank 22 side. Electrical equipment such as an inverter) and a pump 6 can be provided. For this reason, compared with the case where the outflow part 22out is provided in the tank on the side where the water-cooled condenser 30 is provided, the pipe (dotted line portion in FIG. 12) becomes unnecessary.

  In the present embodiment, the cooling water for water cooling passing through the second heat exchange unit 20B disposed on the upper side of the air cooling condenser 40 flows in the same direction as the refrigerant for air conditioning passing through the air cooling condenser 40, thereby cooling the water cooling. The mutual heat influence of water and the air-conditioning refrigerant can be reduced as much 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 width of the sub-radiator 20 and the air-cooled condenser 40, and the water-cooled condenser 30 is provided in the U-turn tank 23 of the sub-radiator 20, thereby improving the layout. Excellent.

  In the present embodiment, the inflow side tank 12 of the main radiator 10 is disposed close to the U-turn tank 23 of the sub radiator 20 and the inflow / outflow tank 42 of the air cooling condenser 40, and the outflow side tank 13 of the main radiator 10 is disposed in the sub radiator. The inflow / outflow tank 20 and the liquid side tank 43 of the air-cooled condenser 40 are arranged in the vicinity. 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 22 in of the inflow / outflow tank 22 of the sub radiator 20, the inflow portion 42 A of the inflow / outflow tank 42 of the air cooling condenser 40, and the inflow portion 12 A of the inflow side tank 12 of the main radiator 10 are the core portion of the main radiator 10. Are arranged on the same side. 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 22f and 23f are formed in the inflow / outflow tank 22 and the U-turn tank 23, and fixing claws 42f and 43f are formed in the inflow / outflow tank 42 and the liquid side tank 43. Are fixed to the inflow side tank 12 and the outflow side tank 13 of the main radiator 10, respectively. 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 22f, 23f, 42f, and 43f into the fixed parts 12a and 13a. This improves the layout.

(Example of change)
Next, a modified example of the composite heat exchanger 1 according to the above-described embodiment will be described with reference to the drawings. FIG. 13 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 1 according to the modified example. In addition, the same code | symbol is attached | subjected to the same part as the composite heat exchanger 1 which concerns on embodiment mentioned above, and a different part is mainly demonstrated.

  In the above-described embodiment, the air-cooling condenser 40 is disposed adjacent to the lower side of the second heat exchange unit 20B, and the water-cooling cooling water that passes through the second heat exchange unit 20B passes through the air-cooling condenser 40. They are flowing in the same direction.

  On the other hand, in the modified example, as shown in FIG. 13, the second heat exchange unit 20B is disposed adjacent to the upper side of the first heat exchange unit 20A, and the air-cooled condenser is disposed below the first heat exchange unit 20A. 40 are arranged adjacent to each other. That is, the second heat exchange unit 20B is arranged at a position away from the air-cooled condenser 40 with the first heat exchange unit 20A interposed therebetween. Even in this case, the cooling water for water cooling that passes through the second heat exchange unit 20B flows in the same direction as the refrigerant for air conditioning that passes through the air cooling condenser 40.

  In such a modified example, the cooling water for water cooling cooled by the second heat exchange unit 20B flows through a position away from the air cooling condenser 40 (high-temperature high-pressure air-conditioning refrigerant), so that the water-cooling cooling water or the air-conditioning refrigerant And the mutual heat influence can be reduced as much as possible, and the heat exchange efficiency of the second heat exchange unit 20B can be further increased.

(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 1st heat exchange part 20A was demonstrated as what is provided in the upper side or the lower side of the 2nd heat exchange part 20B (in the embodiment, it is the lower side in a modification), it is not limited to this. Each may be a separate body. That is, the first heat exchange unit 20A and the second heat exchange unit 20B may be individual sub-radiators including a tube and a pair of tanks.

  Moreover, although the cooling water for water cooling which passes the 2nd heat exchange part 20B demonstrated as what flows in the same direction as the air-conditioning refrigerant | coolant which passes the air-cooling condenser 40, it is not limited to this, The air-cooling condenser 40 is used. It may flow in a direction different from the air conditioning refrigerant that passes therethrough.

  Moreover, although the 1st heat exchange part 20A and the 2nd heat exchange part 20B were demonstrated as what is each provided, it is not limited to this, It may be provided with two or more by turns ( That is, it may be two passes or more (a plurality of turns).

  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 U-turn tank 23 of the sub-radiator 20, it is not limited to this, You may attach to the circumference | surroundings of the U-turn 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.

1 ... Composite heat exchanger 3 ... Strong electrical equipment (on-vehicle equipment)
10 ... Main radiator (4th heat exchanger)
20 ... Sub-radiator (first heat exchanger)
20A ... 1st heat exchange part 20B ... 2nd heat exchange part 21 ... Subradio tube 22 ... Tank for inflow / outflow 23 ... U turn tank 30 ... Water-cooled condenser (3rd heat exchanger)
40 ... Air-cooled condenser (second heat exchanger)
50 ... Relay piping 60 ... Liquid tank 70 ... Assembly

Claims (8)

Heating the first heat exchanger (20) for cooling the first refrigerant, the second heat exchanger (40) for cooling a second refrigerant different from the first refrigerant, the first refrigerant and the second refrigerant. A combined heat exchanger (1) comprising a third heat exchanger (30) to be exchanged,
The first heat exchanger (20) includes a first heat exchange part (20A) and a second heat exchange part (20B),
The first refrigerant cooled by the first heat exchange unit (20A) exchanges heat with the second refrigerant in the third heat exchanger (30), and in the third heat exchanger (30). The heat exchanged first refrigerant exchanges heat in the second heat exchange part (20B), and the first refrigerant exchanged heat by the second heat exchange part (20B) is used for cooling the in-vehicle device. A combined heat exchanger (1). A composite heat exchanger (1) according to claim 1,
The first heat exchange part (20A) is provided above or below the second heat exchange part (20B),
The first refrigerant cooled by the first heat exchange unit (20A) flows into the second heat exchange unit (20B) via the third heat exchanger (30). Mold heat exchanger (1). A composite heat exchanger (1) according to claim 2,
The second heat exchanger (40) is disposed adjacent to the second heat exchange part (20B),
The composite heat exchanger (1), wherein the first refrigerant passing through the second heat exchange part (20B) flows in the same direction as the second refrigerant passing through the second heat exchanger (40). 1). A composite heat exchanger (1) according to claim 2,
The second heat exchanger (40) is disposed adjacent to the first heat exchange part (20A) and sandwiches the first heat exchange part (20A) with the second heat exchanger (40). A composite heat exchanger (1) characterized in that it is disposed at a distant position. A composite heat exchanger (1) according to any one of claims 1 to 4,
The first heat exchange part (20A) is provided above or below the second heat exchange part (20B),
The first heat exchanger includes an inflow / outflow tank (22) provided on the inflow and outflow side of the first refrigerant, and the first refrigerant that has flowed out of the first heat exchange section (20A). 2 U-turn tank (23) that flows into the heat exchanger (20B),
The composite heat exchanger (1), wherein the third heat exchanger (30) is provided in the U-turn tank (23). A composite heat exchanger (1) according to claim 1 or 5, wherein
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 width of the fourth heat exchanger (10) is equal to the width of the first heat exchanger (20) and the second heat exchanger (40). ). A composite heat exchanger (1) according to claim 6,
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 6 or claim 7,
The first heat exchanger (20) and the second heat exchanger (40) each have a fixing portion (22f, 23f, 42f, 43f),
The fourth heat exchanger (10) has a fixed part (12a, 13a) to which the fixing parts (22f, 23f, 42f, 43f) are fixed, respectively. 1).

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