JP2019190685A - Cooling unit - Google Patents

Abstract

To improve heat exchange efficiency of two heat exchangers arranged serially in an air circulation direction in a cooling unit.SOLUTION: A cooling unit 10 has a pair of first and second heat exchangers 16, 18 which conducts heat exchange between a medium circulating therein and air. In an engine room 14 of a vehicle 12, the first heat exchanger 16 and the second heat exchanger 18 are serially arranged in a cross direction of the vehicle 12 and the first heat exchanger 16 is disposed at a front side of the vehicle 12 relative to the second heat exchanger 18. The first and second heat exchangers 16, 18 are separated in a direction orthogonal to an air circulation direction and include: first and second condenser parts 32, 52 in which a refrigerant circulates; and first and second radiator parts 34, 54 in which a coolant circulates. The first condenser part 32 and the second condenser part 52 are connected through a first connection pipe 64 so that the refrigerant can circulate. The first radiator part 34 and the second radiator part 54 are connected through a second connection pipe 66 so that the coolant can circulate.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cooling unit that is arranged in an engine room of a vehicle and cools a medium circulating inside by exchanging heat with air.

  Conventionally, as disclosed in Patent Literature 1, in a vehicle engine room, a refrigerant radiator and a radiator are provided to be arranged in front and rear at a position on the front side of the vehicle, and are incorporated in a common front end panel. Thus, a cooling unit that is integrally assembled is known. The refrigerant radiator of this cooling unit is a heat exchanger that exchanges heat between the refrigerant circulating inside and the air. The radiator is provided on the rear side of the vehicle with respect to the refrigerant radiator, and the cooling water of the engine is inside. It is a heat exchanger that circulates in the air and exchanges heat with air.

  When the vehicle travels, the air taken into the engine compartment from the front of the vehicle passes through the refrigerant radiator to exchange heat with the refrigerant, thereby cooling the refrigerant. By passing through the radiator provided in, the heat exchange is performed with the cooling water to cool the cooling water.

JP2015-81705A

  However, in the cooling system according to Patent Document 1 described above, the air that has been heat-exchanged by the refrigerant radiator and heated is supplied to the radiator disposed on the downstream side, so that the heat exchange efficiency in the radiator decreases. There is a problem that it ends up.

  Moreover, it is difficult to prevent recirculation air flowing between the two heat exchangers because the refrigerant radiator and the radiator are different in size, and a part of the air heated through the radiator is The heat exchange efficiency is further lowered by wrapping from the upper and lower ends of the radiator to the upstream side and passing through the radiator again.

  The present invention has been made in view of the above-described problems, and provides a cooling unit capable of improving the heat exchange efficiency of two heat exchangers arranged in series along the air flow direction. For the purpose.

In order to achieve the above object, an aspect of the present invention includes a pair of first and second heat exchangers that perform heat exchange between a medium circulating inside and air, and the first in a vehicle engine room. The heat exchanger and the second heat exchanger are serially arranged along the front-rear direction of the vehicle, and the first heat exchanger is a cooling unit disposed on the front side of the vehicle with respect to the second heat exchanger,
The first and second heat exchangers are separated in a direction orthogonal to the air flow direction, and include a first heat exchange unit through which the first medium circulates and a second heat exchange unit through which the second medium circulates. With each
The first heat exchange units are connected to each other through the first connection unit so that the first medium can be distributed, and the second heat exchange units are connected to each other through the second connection unit so that the second medium can be distributed. .

  According to the present invention, a pair of first and second heat exchangers arranged in series along the air flow direction is a first medium in which the first medium circulates in a direction orthogonal to the air flow direction. The heat exchange unit and the second heat exchange unit through which the second medium circulates are separated, and one first heat exchange unit and the other first heat exchange unit are connected to each other through the first connection unit. The medium is connected so as to be able to circulate, and the second heat exchange part is connected to the second medium via the second connection part so as to be able to circulate.

  Therefore, even when the two first and second heat exchangers are arranged in series in the air flow direction, the first heat exchange unit for cooling the first medium and the second medium for cooling the second medium Since the second heat exchange units can be arranged in series along the flow direction, air can be passed through the first and second heat exchange units along the flow direction to exchange heat with the medium. it can.

  As a result, since the heat exchange between the first medium and the second medium can be performed uniformly, the heat exchange efficiency of both can be made uniform, and the refrigerant radiator is provided on the front side in the air flow direction. The heat exchange efficiency in the cooling unit can be improved as compared with the conventional cooling unit in which the radiator is disposed on the rear side.

  According to the present invention, the following effects can be obtained.

  That is, a set of first and second heat exchangers arranged in series along the air flow direction, and a first heat exchange unit in which the first medium circulates in a direction orthogonal to the air flow direction, The second medium circulates to the second heat exchanging part, and the first medium exchanges between the first heat exchanging part and the other first heat exchanging part via the first connecting part. The second medium is connected to the second heat exchange part and the other second heat exchange part via the second connection part so that the second medium can flow freely, thereby cooling the first medium. The first heat exchanging part and the second heat exchanging part for cooling the second medium can be arranged in series along the circulation direction, and accordingly, the first and the second heat exchange parts are arranged along the circulation direction. Heat can be exchanged with the medium by allowing air to pass through each of the two heat exchange units.

  As a result, since the heat exchange efficiency between the first medium and the second medium can be made uniform by uniformly performing the heat exchange between the first medium and the second medium, a refrigerant radiator is disposed on the front side in the air flow direction. Compared with the conventional cooling unit in which the radiator is arranged on the rear side, even when the two first and second heat exchangers are arranged in series, the heat exchange efficiency in the cooling unit can be increased.

It is a schematic block diagram which shows the engine room vicinity of the vehicle to which the cooling unit which concerns on embodiment of this invention was applied. 2A is a front view of the cooling unit shown in FIG. 1, and FIG. 2B is a plan view of the cooling unit shown in FIG. 2A. 3A to 3D are schematic side views showing cooling units according to first to fourth modifications.

  Preferred embodiments of the cooling unit according to the present invention will be described below and described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a cooling unit according to an embodiment of the present invention.

  As shown in FIG. 1, the cooling unit 10 is provided in an engine room 14 provided in front of the vehicle 12, and includes a first heat exchanger 16 provided on the front side (in the direction of arrow A <b> 1), and the first heat exchanger 16. The second heat exchanger 18 is arranged on the rear side (in the direction of arrow A2) of the heat exchanger 16 and spaced apart by a predetermined distance. The fan 20 is further rearward (in the direction of arrow A2) of the second heat exchanger 18. Are placed close together. The fan 20 is connected to a controller (not shown) via a lead wire, and is driven and controlled by a control signal from the controller.

  In other words, the first heat exchanger 16 is disposed on the upstream side (arrow A1 direction) to which traveling wind (air) is supplied when the vehicle 12 is traveling, and the second heat exchanger 18 is downstream (arrow A2). Direction) and arranged in series.

  As shown in FIGS. 1 to 2B, the first heat exchanger 16 is provided at both ends along the width direction (the arrow B direction in FIGS. 2A and 2B) and the vertical direction (the directions of the arrows C <b> 1 and C <b> 2). A pair of first and second upstream tanks 22, 24 extending along the width direction, and a plurality of tubes 26 extending along the width direction and connecting the first upstream tank 22 and the second upstream tank 24. And a plurality of fins 28 provided between adjacent tubes 26 and bent in a wave shape.

  The first heat exchanger 16 includes a first heat exchange unit 30 including a plurality of tubes 26 and fins 28 arranged side by side so as to be adjacent to each other in the vertical direction (the directions of arrows C1 and C2). ing. The first heat exchanging unit 30 is provided upward (in the direction of arrow C1) from the center along the vertical direction, and is provided in the downward direction (in the direction of arrow C2) from the center. And a first radiator 34 through which cooling water (medium) circulates. That is, the first condenser part 32 and the first radiator part 34 are formed with substantially the same area so as to have substantially the same height in the vertical direction of the first heat exchanger 16.

  The first and second upstream tanks 22 and 24 are each divided into two by partition plates 36a and 36b (see FIG. 2A) provided in the center along the vertical direction, and the partition plates 36a and 36b. The first space 38 that communicates with the tube 26 of the first capacitor portion 32 (in the direction of arrow C1), and communicates with the tube 26 of the first radiator section 34 (under the direction of arrow C2) below the partition plates 36a and 36b. And a second space portion 40. That is, the first and second upstream tanks 22 and 24 are supplied with the refrigerant in the first space 38 and supplied with the cooling water in the second space 40.

  The first upstream tank 22 includes a refrigerant discharge portion 42 that is connected to the first space portion 38 and discharges refrigerant, and a cooling water discharge portion 44 that is connected to the second space portion 40 and discharges cooling water. The refrigerant discharge part 42 is connected to an evaporator (not shown) of a vehicle air conditioner (not shown) via a pipe (not shown), and the cooling water discharge part 44 is connected to the engine via a pipe (not shown). It is connected to the cooling passage.

  The second heat exchanger 18 is formed in substantially the same shape as the first heat exchanger 16 described above, and is provided at both ends along the width direction (arrow B direction) and along the vertical direction (arrow C1, C2 direction). A pair of first and second downstream tanks 46, 48, a plurality of tubes 26 extending in the width direction and connecting the first downstream tank 46 and the second downstream tank 48, And a plurality of fins 28 provided between adjacent tubes 26 and bent in a wave shape. That is, the first and second heat exchangers 16 and 18 are used such that the plurality of tubes 26 extend in a substantially horizontal direction (arrow B direction).

  Similar to the first heat exchanger 16, the second heat exchanger 18 includes a second heat exchange unit 50 including a plurality of tubes 26 and fins 28 arranged side by side so as to be adjacent to each other in the vertical direction. have.

  The second heat exchanging part 50 is provided above the center along the vertical direction (in the direction of the arrow C1) and the second condenser part 52 in which the refrigerant circulates, and below the center (in the direction of the arrow C2) and provided with cooling water. The second radiator 54 is configured to circulate. The second condenser part 52 and the second radiator part 54 are formed with substantially the same area so as to have substantially the same height in the vertical direction of the second heat exchanger 18.

  That is, as shown in FIG. 1, the second condenser part 52 faces the first condenser part 32 of the first heat exchanger 16 in the air flow direction (arrow A2 direction) which is the front-rear direction of the vehicle 12. And the second radiator portion 54 is disposed so as to face the first radiator portion 34 of the first heat exchanger 16. The first capacitor portion 32 and the second capacitor portion 52, and the first radiator portion 34 and the second radiator portion 54 are formed so as to have substantially the same area.

  The first and second downstream tanks 46 and 48 are each divided into two by partition plates 36a and 36b provided in the center along the vertical direction, and above the partition plates 36a and 36b (arrow C1). Direction) and a fourth space portion that communicates with the tube 26 of the second radiator portion 54 and that is below the partition plates 36a and 36b (in the direction of arrow C2). 58.

  The first downstream tank 46 is connected to the third space 56 and supplied with a coolant, and the coolant supply unit 62 is connected to the fourth space 58 and supplied with cooling water. The refrigerant supply unit 60 is connected to a compressor (not shown) via a pipe (not shown), and the cooling water supply part 62 is connected to a cooling passage of the engine via a pipe (not shown). Yes.

  That is, the first and second downstream tanks 46 and 48 are supplied with the refrigerant to the third space 56 and supplied with the cooling water to the fourth space 58.

  In addition, a first connection pipe (first connection portion) 64 that connects the third space 56 of the second downstream tank 48 and the first space 38 of the second upstream tank 24, and the second downstream tank The 48th 4th space part 58 and the 2nd connection piping (2nd connection part) 66 which connects the 2nd space part 40 of the 2nd upstream tank 24 are provided.

  The first and second connection pipes 64 and 66 are provided substantially horizontally so as to connect the outer sides of the second upstream tank 24 and the second downstream tank 48, and the first connection pipe 64 includes a first connection pipe 64 and 66. The refrigerant flows from the second heat exchanger 18 to the first heat exchanger 16, and the cooling water flows from the second heat exchanger 18 to the first heat exchanger 16 through the second connection pipe 66.

  As described above, the refrigerant and the cooling water are respectively supplied to the second heat exchanger 18 provided on the downstream side in the air flow direction, and then upstream (arrows) through the first and second connection pipes 64 and 66. Are supplied to the first heat exchangers 16 arranged in the A1 direction).

  The first condenser section 32 and the first radiator section 34 in the first heat exchanger 16 and the second condenser section 52 and the second radiator section 54 in the second heat exchanger 18 are divided approximately equally at the center in the vertical direction. However, the present invention is not limited to the case.

  Further, as shown in FIG. 1, a pair of first and second heat exchangers 16, 18 is set so as to straddle the first heat exchanger 16 and the second heat exchanger 18. The first heat exchanger 16 and the second heat exchanger 18 are provided by the shield plates 68a and 68b that extend along the front-rear direction of the vehicle 12 (arrows A1 and A2 directions). The space between is covered.

  The cooling unit 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effects thereof will be described.

  First, the refrigerant heat-exchanged in a vehicle air-conditioning system (not shown) is supplied from the refrigerant supply unit 60 to the first downstream tank 46 of the second heat exchanger 18 through piping, and at the same time is cooled from an engine (not shown). Water is supplied from the cooling water supply unit 62 to the first downstream tank 46 through a pipe.

  Then, the refrigerant flows from the third space portion 56 of the first downstream tank 46 to the second downstream tank 48 along the plurality of tubes 26 constituting the second condenser portion 52 in the second heat exchanger 18, By flowing into the third space portion 56 of the second downstream tank 48, heat exchange is performed between the air passing through the second condenser portion 52 and the refrigerant in the tube 26. Accordingly, the cooled refrigerant flows from the second downstream tank 48 through the first connection pipe 64 to the first space 38 of the second upstream tank 24 in the first heat exchanger 16.

  On the other hand, the cooling water flows from the fourth space 58 of the first downstream tank 46 in the second heat exchanger 18 to the second downstream tank 48 side along the plurality of tubes 26 constituting the second radiator 54. By flowing and flowing into the fourth space 58 of the second downstream tank 48, heat exchange is performed between the air passing through the second radiator 54 and the cooling water in the tube 26. Thereby, the cooled cooling water flows from the second downstream tank 48 through the second connection pipe 66 to the second space 40 of the second upstream tank 24 in the first heat exchanger 16.

  And the refrigerant | coolant supplied to the 2nd upstream tank 24 of the 1st heat exchanger 16 passes along the several tube 26 which comprises the 1st capacitor | condenser part 32 from the 1st space part 38, and a 1st upstream tank By flowing to the side 22, the air passing through the first condenser portion 32 and the refrigerant in the tube 26 are heat-exchanged to further cool the refrigerant, and to the first space 38 of the first upstream tank 22. After being supplied, the refrigerant is discharged from the refrigerant discharge portion 42 to the outside.

  On the other hand, the cooling water supplied to the second upstream tank 24 of the first heat exchanger 16 flows from the second space portion 40 along the plurality of tubes 26 constituting the first radiator portion 34 to the first upstream side. By flowing to the tank 22 side, the air passing through the first radiator section 34 and the cooling water in the tube 26 are heat-exchanged to further cool the cooling water, and the second space of the first upstream tank 22 is cooled. After being supplied to the unit 40, it is discharged from the cooling water discharge unit 44 to the outside.

  As described above, in the present embodiment, in the cooling unit 10 having the first and second heat exchangers 16 and 18 arranged in series along the air flow direction, the first upstream side in the air flow direction is the first. 1 heat exchanger 16 is disposed, a second heat exchanger 18 having substantially the same shape is disposed downstream of the first heat exchanger 16, and the first and second heat exchangers 16, 18 include The first and second capacitor parts 32 and 52 in which the refrigerant circulates are provided on the upper side along the vertical direction (arrow C1 direction), respectively, and the lower side (arrow C2) of the first and second capacitor parts 32 and 52 are provided. First and second radiators 34 and 54 that circulate cooling water in the direction), and the first condenser part 32 and the second condenser part 52 are connected by a first connection pipe 64, and the first radiator part 34 and The second radiator 54 and the second They are connected by a connecting pipe 66.

  Thus, even when the two first and second heat exchangers 16 and 18 are arranged in the air flow direction, the first and second condenser portions 32 and 52 for cooling the refrigerant and the cooling water are cooled. Since the first and second radiator parts 34 and 54 can be arranged in series along the flow direction, the first and second capacitor parts 32 and 52 and the first and second radiator parts 34 and 54 On the other hand, heat can be exchanged by allowing air to pass evenly.

  As a result, the first and second condenser portions 32 and 52 that perform heat exchange of the refrigerant as compared with the conventional cooling unit in which the refrigerant radiator is arranged on the front side and the radiator is arranged on the rear side in the air flow direction. The heat exchange efficiency in the cooling unit 10 can be improved by making the heat exchange efficiencies of the first and second radiator sections 34 and 54 that perform heat exchange with the cooling water equal.

  In addition, the first heat exchanger 16 provided on the upstream side and the second heat exchanger 18 provided on the downstream side have substantially the same shape, so that the upper end and the lower end thereof are a pair of shielding plates 68a and 68b, respectively. The air heated by passing through the second heat exchanger 18 on the downstream side again flows as a recirculation air from between the second heat exchanger 18 and the first heat exchanger 16. It is prevented from being taken into the second heat exchanger 18. Therefore, it is possible to avoid a decrease in heat exchange efficiency due to the recirculation air being taken into the second heat exchanger 18 and to increase the heat exchange efficiency in the cooling unit 10.

  Further, in the first and second heat exchangers 16 and 18, the first and second condenser parts 32 and 52 and the first and second radiator parts 34 and 54 divided in the vertical direction (arrow C1 and C2 direction) By changing the area ratio, the heat exchange performance of the refrigerant and the cooling water can be freely adjusted.

  Furthermore, the refrigerant and the cooling water are supplied to the second heat exchanger 18 disposed on the downstream side, and are circulated to the first heat exchanger 16 disposed on the upstream side, so that the vehicle is not illustrated. Refrigerant and cooling water heated by an air conditioner or an engine are circulated first to the second heat exchanger 18 on the downstream side through which air whose temperature has increased compared to the first heat exchanger 16 passes, It is possible to cool the refrigerant and cooling water in advance, and then circulate to the first heat exchanger 16 through which air having a temperature lower than that of the second heat exchanger 18 passes to cool the refrigerant and cooling water more efficiently. Become. Therefore, the heat exchange efficiency in the cooling unit 10 can be further improved.

  In the cooling unit 10 described above, a case where the tubes 26 in the first and second heat exchangers 16 and 18 are arranged and used so as to extend along the horizontal direction (width direction, arrow B direction) will be described. However, the present invention is not limited to this, and the tube 26 extends in the vertical direction (arrow C1, C2 direction), and the first and second upstream tanks 22, 24 extend in the horizontal direction (arrow B direction). You may arrange | position and use so that it may extend.

  In addition, the first and second heat exchangers 16 and 18 are not limited to the case where the first and second heat exchangers 16 and 18 are configured separately from each other in the same shape as described above. It may be integrally formed by brazing or the like.

  Further, like the cooling unit 10 described above, the first condenser section 32 and the first radiator section 34 in the first heat exchanger 16, and the second condenser section 52 and the second radiator section 54 in the second heat exchanger 18 are: The present invention is not limited to the case where they are formed so as to face the air flow direction and have substantially the same area.

  For example, in the cooling unit 80 according to the first modification shown in FIG. 3A, the first condenser part 84 in the first heat exchanger 82 is formed larger than the first radiator part 86, and the vertical direction (arrow C1, C2 direction). The first capacitor portion 84 is formed in substantially the same area as the second capacitor portion 90 of the second heat exchanger 88. The two first and second heat exchange paths P1 and P2 are divided into two.

  In the cooling unit 80, the first condenser part 84 includes a first heat exchange path P1 provided above the first radiator part 86 in the vertical direction and a second heat exchange provided above the first heat exchange path P1. The second upstream tank 24 and the second downstream tank 48 that are configured by the path P2 and connected to the second heat exchange path P2 are connected by a first connection pipe 64.

  Further, the first and second upstream tanks 22 and 24 are respectively divided into 3 by partition plates (not shown) corresponding to the first and second heat exchange paths P1 and P2 and the first radiator 86, respectively. It is divided.

  Then, the refrigerant circulated through the second heat exchanger 88 flows from the second downstream tank 48 to the second upstream tank 24 of the first heat exchanger 16 through the first connection pipe 64, and the first condenser unit 84. After flowing to the first upstream tank 22 through the tube 26 of the second heat exchange path P2, it flows again to the second upstream tank 24 through the tube 26 of the first heat exchange path P1. During this time, heat exchange is performed between the air and the refrigerant to cool the refrigerant. And it is discharged | emitted from the refrigerant | coolant discharge part 42 connected to the 2nd upstream tank 24 to the exterior.

  Thus, in the cooling unit 80 described above, in the first and second heat exchangers 82 and 88, the first and second condenser parts 84 and 90 are larger in area than the first and second radiator parts 86 and 54. By comprising, the refrigerant | coolant which circulates through the 1st and 2nd capacitor | condenser parts 84 and 90 can be cooled more efficiently compared with cooling water, Therefore The heat exchange efficiency of this refrigerant | coolant can be improved. Furthermore, it is possible to further increase the cooling efficiency of the refrigerant by configuring the first condenser unit 84 from the two heat exchange paths P1 and P2.

  Further, in the cooling unit 100 according to the second modification shown in FIG. 3B, in the first heat exchanger 102, the first radiator section 104 is upward (arrow C1 direction), and the first condenser section 106 is downward (arrow C2 direction). In the second heat exchanger 108, the second condenser unit 110 is disposed upward (in the direction of arrow C1), and the second radiator unit 112 is disposed downward (in the direction of arrow C2). In addition, the first radiator section 104 and the second capacitor section 110 disposed above are formed with the same size, and the first capacitor section 106 and the second radiator section 112 disposed below are formed with the same size. is doing.

  In other words, the first capacitor unit 106 and the second capacitor unit 110, and the first radiator unit 104 and the second radiator unit 112 are arranged alternately.

  Further, the first connection pipe 114 that connects the first capacitor section 106 and the second capacitor section 110 is connected obliquely, and the second connection pipe 116 that connects the first radiator section 104 and the second radiator section 112 is the above-mentioned The first connection pipe 114 is connected obliquely so as to intersect.

  Further, in the cooling unit 120 according to the third modified example shown in FIG. 3C, in the first heat exchanger 122, the first radiator portion 124 is disposed upward (in the direction of arrow C1), and the two heat exchange paths P1, P2 are arranged. The first capacitor portion 126 having a position is arranged to be downward (in the direction of arrow C2).

  On the other hand, in the second heat exchanger 128, the second condenser section 130 having the two heat exchange paths P1 and P2 is upward (in the direction of arrow C1), and the second radiator section 132 is downward (in the direction of arrow C2). The heat exchange path P2 in the second capacitor unit 130 and the heat exchange path P1 in the first capacitor unit 126 are arranged to face each other, and are connected to each other by the first connection pipe 134.

  Further, a second connection in which the first radiator portion 124 provided at the uppermost position in the first heat exchanger 122 and the second radiator portion 132 provided at the lowermost position in the second heat exchanger 128 are provided obliquely. The pipes 136 are connected.

  Further, in the cooling unit 140 according to the fourth modification shown in FIG. 3D, in the first and second heat exchangers 142 and 144, the first and second capacitor portions 146 and 148 are respectively upward (in the direction of the arrow C1). The first and second radiator sections 150 and 152 are disposed below (in the direction of arrow C2), and the second upstream tank 24 and the second tank 24 are connected to the first and second radiator sections 150 and 152, respectively. The difference from the cooling unit 10 according to the present embodiment is that the cooling water is directly supplied to the two downstream tanks 48.

  That is, in the cooling units 10, 80, 100, 120, 140, the first heat exchangers 16, 82, 102, 122, 142 arranged in series along the air flow direction (arrow A2 direction) and the second heat Refrigerant and cooling water are supplied to the second heat exchangers 18, 88, 108, 128, and 144 at least on the downstream side of the exchangers 18, 88, 108, 128, and 144, and the first connection pipes 64, 114, and 134 are supplied. And circulate to the first heat exchangers 16, 82, 102, 122, 142 side through the second connection pipes 66, 116, 136, and the second heat pipes 16, 82, 102, 122, 142 and the second heat exchangers If the condenser unit and the radiator unit are arranged in the vertical direction of the heat exchangers 18, 88, 108, 128, and 144, the arrangement and the like are not particularly limited.

  In addition, the cooling unit according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

10, 80, 100, 120, 140 ... Cooling units 16, 82, 102, 122, 142 ... First heat exchangers 18, 88, 108, 128, 144 ... Second heat exchanger 22 ... First upstream tank 24 ... 2nd upstream side tank 26 ... Tube 28 ... Fin 32, 84, 106, 126, 146 ... 1st capacitor | condenser part 34, 86, 104, 124, 150 ... 1st radiator part 46 ... 1st downstream side tank 48 ... 1st 2 downstream tanks 52, 90, 110, 130, 148 ... second capacitor parts 54, 112, 132, 152 ... second radiator parts 64, 114, 134 ... first connection pipes 66, 116, 136 ... second connection pipes 68a, 68b ... shielding plate

Claims (4)

It has a pair of first and second heat exchangers for exchanging heat between the medium circulating inside and the air, and the first heat exchanger and the second heat exchanger are installed in the vehicle in an engine room of the vehicle. The cooling unit is arranged in series along the front-rear direction of the vehicle, and the first heat exchanger is disposed on the front side of the vehicle with respect to the second heat exchanger,
The first and second heat exchangers are separated in a direction orthogonal to the air flow direction, and a first heat exchanging part for circulating the first medium, and a second heat exchanging part for circulating the second medium, Each with
The first heat exchange sections are connected to each other through the first connection section so that the first medium can be circulated, and the second heat exchange sections are connected to each other through the second connection section. Connected to the cooling unit. The cooling unit according to claim 1, wherein
A cooling unit in which the first heat exchanging unit is a condenser and the first medium is a refrigerant, the second heat exchanging unit is a radiator, and the second medium is cooling water for cooling the engine. . The cooling unit according to claim 1 or 2,
The first heat exchanger and the second heat exchanger are formed in substantially the same shape, and the first heat exchange is provided at an end of the first and second heat exchangers perpendicular to the air flow direction. A cooling unit provided with a shielding plate that covers a space between the heat exchanger and the second heat exchanger. The cooling unit according to any one of claims 1 to 3,
A cooling unit in which at least one of the first and second heat exchange units has a plurality of heat exchange paths in a direction orthogonal to the air flow direction.

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