JP2015010792A - Combined heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined heat exchanger capable of keeping a cooling effective area and improving cooling efficiency while arranging a first heat exchanger.SOLUTION: A combined heat exchanger 1 comprises: a first heat exchanger 3 implementing heat exchange between a first refrigerant and a second refrigerant; a second heat exchanger 5 implementing heat exchange between the first refrigerant and cooling air; a third heat exchanger 7 implementing heat exchange between the second refrigerant and the cooling air; and a fourth heat exchanger 9 arranged downstream of the second heat exchanger 5 and the third heat exchanger 7 in a cooling air flow direction. The fourth heat exchanger 9 includes: a heat exchange unit 11; and a pair of tank portions 13 and 15 located on the right and left sides of this heat exchange unit 11, respectively. The first heat exchanger 3 is arranged in the fourth heat exchanger 9 side and arranged in an arrangement area of one tank portion 13 of the fourth heat exchanger 9 in a front view in the cooling air flow direction.

Description

  The present invention relates to a composite heat exchanger applied to a vehicle.

  Conventionally, as a composite heat exchanger, a first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant, and the first refrigerant that flows out of the first heat exchanger and the cooling air are used. 2. Description of the Related Art A known heat exchanger includes a second heat exchanger that exchanges heat, and a third heat exchanger that exchanges heat between the second refrigerant and cooling air and flows the second refrigerant into the first heat exchanger. (For example, refer to Patent Document 1).

  In this composite heat exchanger, the second heat exchanger and the third heat exchanger are disposed adjacent to each other in the vertical direction, and the second heat exchanger and the third heat exchanger are arranged on one side in the left-right direction. The 1st heat exchanger is attached ranging over the 2nd heat exchanger and the 3rd heat exchanger so that 2 heat exchanger and the 3rd heat exchanger may be connected and fixed.

JP 2012-83014 A

  By the way, the composite heat exchanger like the above-mentioned patent document 1 is a cooling of the 2nd heat exchanger and the 3rd heat exchanger in addition to the 1st heat exchanger, the 2nd heat exchanger, and the 3rd heat exchanger. A fourth heat exchanger is disposed on the downstream side of the wind and exchanges heat between the cooling air and the third refrigerant.

  The fourth heat exchanger has a vertical size substantially equal to a size in which the second heat exchanger and the third heat exchanger are arranged adjacent to each other in the vertical direction, and the horizontal size is the second size. The size of the heat exchanger and the third heat exchanger is set substantially equal to the size in the left-right direction.

  Such a composite heat exchanger has a limited space in the vehicle. For this reason, when the first heat exchanger is attached to one side in the left-right direction of the second heat exchanger and the third heat exchanger as in the composite heat exchanger of Patent Document 1, the first heat exchanger Therefore, it is necessary to reduce the size in the left-right direction of the second heat exchanger and the third heat exchanger. In addition, the fourth heat exchanger located on the downstream side of the cooling air of the second heat exchanger and the third heat exchanger also needs to be reduced in size in the left-right direction.

  When the size in the left-right direction of the composite heat exchanger is reduced in this way, the second heat exchanger, the third heat exchanger, and the fourth heat exchanger that exchange heat between the cooling air and the refrigerant are cooled. There is a possibility that the effective area is also narrowed and cannot be efficiently cooled.

  Therefore, an object of the present invention is to provide a composite heat exchanger that can maintain a cooling effective area while arranging the first heat exchanger and can improve cooling efficiency.

  In the first aspect of the present invention, heat is generated between the first heat exchanger that exchanges heat between the first refrigerant and the second refrigerant, and the first refrigerant that flows out of the first heat exchanger and the cooling air. A second heat exchanger to be exchanged, a third heat exchanger for exchanging heat between the second refrigerant and the cooling air, and flowing the second refrigerant to the first heat exchanger, and the second heat exchange And a fourth heat exchanger disposed on the downstream side of the cooling air and the fourth heat exchanger for exchanging heat between the cooling air and the third refrigerant, The fourth heat exchanger has a heat exchange part and a pair of tank parts located on the left and right sides of the heat exchange part, and the first heat exchanger is disposed on the fourth heat exchanger side. And arranged in an arrangement region of one tank portion of the fourth heat exchanger in a front view from the flow direction of the cooling air.

  In this composite heat exchanger, the first heat exchanger is arranged on the fourth heat exchanger side, and in the arrangement region of one tank portion of the fourth heat exchanger in a front view from the flow direction of the cooling air. Since it is arrange | positioned, it can suppress that a 1st heat exchanger overhangs from the one side of the left-right direction of a 2nd heat exchanger, a 3rd heat exchanger, and a 4th heat exchanger.

  Therefore, the composite heat exchanger can be arranged in the arrangement space of the vehicle without downsizing the heat exchange parts of the second heat exchanger, the third heat exchanger, and the fourth heat exchanger in the left-right direction. In addition, the effective cooling area can be secured and the cooling efficiency can be improved.

  Therefore, in such a composite heat exchanger, the cooling effective area can be maintained while arranging the first heat exchanger, and the cooling efficiency can be improved.

  Invention of Claim 2 is a composite type heat exchanger of Claim 1, Comprising: The avoidance part which avoids interference with a said 1st heat exchanger in one tank part of a said 4th heat exchanger Is provided.

  In this composite heat exchanger, since an avoidance part for avoiding interference with the first heat exchanger is provided in one tank part of the fourth heat exchanger, the heat exchange part of the fourth heat exchanger is affected. Without providing the first heat exchanger.

  Invention of Claim 3 is a composite-type heat exchanger of Claim 2, Comprising: A said 1st heat exchanger is located in the downstream of the said cooling air from one tank part of the said 4th heat exchanger. The avoidance unit includes a first communication unit that communicates the first refrigerant between the first heat exchanger and the second heat exchanger, the first heat exchanger, and the third heat exchanger. And interference with at least one of the second communicating portions with which the second refrigerant communicates.

  In the composite heat exchanger, the avoiding unit includes a first communication unit in which the first refrigerant communicates between the first heat exchanger and the second heat exchanger, a first heat exchanger, and a third heat exchanger. By avoiding interference with at least one of the second communication portions communicating with the second refrigerant between the two, the avoidance shape of the avoidance portion can be reduced, and by providing the avoidance portion The influence on one tank part of a 4th heat exchanger can be suppressed to the minimum.

  Invention of Claim 4 is a composite-type heat exchanger of any one of Claim 1 thru | or 3, Comprising: One tank part of the said 4th heat exchanger is cooled by the said heat exchange part. The third refrigerant is flowed in.

  In this composite heat exchanger, the third refrigerant cooled by the heat exchange part flows into one tank part of the fourth heat exchanger, and therefore is disposed in the vicinity of one tank part of the fourth heat exchanger. The first heat exchanger does not receive heat from the high-temperature third refrigerant, and the durability of the first heat exchanger can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the composite heat exchanger which can hold | maintain an effective cooling area and can improve cooling efficiency can be provided, arrange | positioning a 1st heat exchanger.

1 is a schematic view of a vehicle heat exchange system to which a composite heat exchanger according to an embodiment of the present invention is applied. It is a perspective view when arrange | positioning the 1st heat exchanger of the composite heat exchanger which concerns on 1st Embodiment of this invention. 1 is a perspective view of a composite heat exchanger according to a first embodiment of the present invention. 1 is a top view of a composite heat exchanger according to a first embodiment of the present invention. 1 is a side view of a composite heat exchanger according to a first embodiment of the present invention. It is a perspective view of the composite heat exchanger which concerns on 2nd Embodiment of this invention. It is a top view of the composite heat exchanger which concerns on 2nd Embodiment of this invention. It is a side view of the composite heat exchanger which concerns on 2nd Embodiment of this invention. It is a side view which shows the other example of the composite heat exchanger which concerns on 2nd Embodiment of this invention.

  First, a vehicle heat exchange system to which the composite heat exchanger according to the present embodiment is applied will be described with reference to FIG.

  As shown in FIG. 1, the vehicle heat exchange system includes a water-cooled condenser 3 as a first heat exchanger that exchanges heat between an A / C refrigerant that is a first refrigerant and cooling water that is a second refrigerant. An air-cooling condenser 5 as a second heat exchanger that cools the A / C refrigerant that is the first refrigerant of the indoor unit 201 such as an air conditioner in the vehicle interior, and cooling water that is the second refrigerant of the electric system component 203 such as a motor or an inverter. The sub-radiator 7 as a third heat exchanger that cools the engine and the main radiator 9 as a fourth heat exchanger that cools the cooling water that is the third refrigerant of the engine 205 are provided.

  The main radiator 9 is disposed on the upstream side of the cooling air flow of the fan & shroud 49. The main radiator 9 has a plurality of tubes (not shown) through which cooling water for the engine 205 circulated by a pump (not shown) flows, and exchanges heat with the cooling air flowing outside the tubes. Do.

  The sub radiator 7 is arranged on the upstream side of the cooling air flow of the main radiator 9 and is arranged in the upper half region of the main radiator 9. This sub radiator 7 has a plurality of tubes (not shown) through which cooling water for electric system parts 203 such as a motor and an inverter circulated by the electric water pump 207 flows, and cooling air flowing outside the tubes. Heat exchange between.

  The air-cooling condenser 5 is disposed on the upstream side of the cooling air flow of the main radiator 9 and is disposed in the lower half region of the main radiator 9. This air-cooled condenser 5 has a plurality of tubes (not shown) through which an A / C refrigerant for an indoor unit 201 such as an air conditioner inside the vehicle flows, and performs heat exchange with cooling air flowing outside the tubes. .

  The water-cooled condenser 3 is connected in series in a refrigeration cycle disposed upstream of the air-cooled condenser 5. The A / C refrigerant, which is the first refrigerant that has been made high temperature and high pressure by the compressor 209 of the refrigeration cycle, flows into the water-cooled condenser 3 and flows out to the air-cooled condenser 5 through the water-cooled condenser 3.

  On the other hand, the cooling water, which is the second refrigerant cooled by the sub-radiator 7, flows into the water-cooled condenser 3, exchanges heat with the A / C refrigerant, and then flows out to the electric system component 203.

  The sub-radiator 7 in such a vehicle heat exchanging system mainly cools the water-cooled condenser 3 when the performance of the air-cooled condenser 5 such as idling is severe, and the traveling load in which the electric system parts 203 such as a motor and an inverter generate large heat. In a high state, the electric system component 203 is mainly cooled, and heat is always radiated efficiently. Thereby, the sub radiator 7 and the air cooling capacitor 5 can be reduced in size, and the sub radiator 7 and the air cooling capacitor 5 can be arranged on the same plane in the vertical direction.

  The switching of the cooling target by the sub radiator 7 is automatically performed according to the temperature relationship between the A / C refrigerant that is the first refrigerant and the cooling water that is the second refrigerant, and does not require a switching valve or the like. It has a configuration.

  In the vehicle heat exchange system configured as described above, the sub-radiator 7 and the air cooling condenser 5 are arranged on the same plane in the vertical direction on the upstream side of the cooling air flow of the main radiator 9, thereby reducing the cooling air flow. On the other hand, the sub radiator 7, the air cooling condenser 5, and the main radiator 9 are not arranged in three rows, and a decrease in the wind speed and an increase in temperature of the cooling air can be prevented.

  Next, the composite heat exchanger according to the embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
The first embodiment will be described with reference to FIGS.

  The composite heat exchanger 1 according to the present embodiment flows out of a first heat exchanger (water-cooled condenser) 3 that exchanges heat between the first refrigerant and the second refrigerant, and the first heat exchanger 3. Heat exchange is performed between the second heat exchanger (air-cooled condenser) 5 that exchanges heat between the first refrigerant and the cooling air, and the second refrigerant and cooling air, and the second refrigerant flows out to the first heat exchanger 3. A third heat exchanger (sub-radiator) 7, a second heat exchanger 5 and a third heat exchanger 7 arranged on the downstream side of the cooling air to exchange heat between the cooling air and the third refrigerant. A heat exchanger (main radiator) 9 is provided.

  The fourth heat exchanger 9 includes a heat exchange part 11 and a pair of tank parts 13 and 15 located on the left and right sides of the heat exchange part 11.

  The first heat exchanger 3 is arranged on the fourth heat exchanger 9 side, and is arranged in an arrangement region of one tank portion 13 of the fourth heat exchanger 9 in a front view from the cooling air flow direction. Has been.

  Further, one tank portion 13 of the fourth heat exchanger 9 is provided with an avoidance portion 17 that avoids interference with the first heat exchanger 3.

  Further, the third refrigerant cooled by the heat exchange unit 11 flows into one tank unit 13 of the fourth heat exchanger 9.

  As shown in FIGS. 2 to 5, the first heat exchanger 3 includes a first refrigerant in a plurality of plates (not shown), a plurality of spacers (not shown), a plurality of inner fins (not shown), and the like. Is divided into a flow path through which the second refrigerant flows and a flow path through which the second refrigerant flows. In addition, the contact surface of each member which comprises the 1st heat exchanger 3 is brazed.

  The first heat exchanger 3 is in communication with a flow path through which the first refrigerant flows and flows in the first refrigerant, and a first refrigerant inlet portion 19 through which the first refrigerant flows, and a flow path through which the first refrigerant flows. The first refrigerant outlet portion 21 that flows out, the second refrigerant inlet portion 23 that communicates with the flow path through which the second refrigerant flows and the second refrigerant flows in, and the second refrigerant that communicates with the flow path through which the second refrigerant flows. The 2nd refrigerant | coolant exit part 25 made to flow out is provided.

  The first refrigerant inlet portion 19 is provided toward the downstream side of the cooling air flow (fourth heat exchanger 9 side), and the compressor outlet portion 27 connected to the compressor 209 (see FIG. 1) side is connected to the first refrigerant inlet portion 19. An A / C refrigerant that is a first refrigerant having a high pressure is caused to flow into the first heat exchanger 3.

  The first refrigerant outlet 21 is provided via a pipe arranged toward the downstream side of the cooling air flow (the fourth heat exchanger 9 side), and the refrigerant inlet provided in the second heat exchanger 5 The A / C refrigerant that is the first refrigerant that is connected to 29 and flows through the flow path in the first heat exchanger 3 is caused to flow out to the second heat exchanger 5.

  The 2nd refrigerant | coolant inlet part 23 is provided toward the upstream (3rd heat exchanger 7 side) of a cooling wind flow, is connected to the refrigerant | coolant outlet part 31 provided in the 3rd heat exchanger 7, and is 3rd heat | fever. Cooling water that is the second refrigerant flowing through the exchanger 7 is caused to flow into the first heat exchanger 3.

  The second refrigerant outlet portion 25 is provided toward the downstream side of the cooling air flow (the fourth heat exchanger 9 side), and is connected to the electric component 203 (see FIG. 1) side. The cooling water that is the second refrigerant flowing through the flow path in the first heat exchanger 3 is caused to flow out to the electrical system component 203 side.

  Such a 1st heat exchanger 3 performs heat exchange between the 1st refrigerant | coolant flowed in and the 2nd refrigerant | coolant, the 1st refrigerant | coolant is flowed out to the 2nd heat exchanger 5, and a 2nd refrigerant | coolant is made to flow out. It flows out to the electric system part 203 side.

  The second heat exchanger 5 is arranged on the upstream side of the cooling air flow of the fourth heat exchanger 9 and is located in the lower half region of the fourth heat exchanger 9 in a front view from the cooling air flow direction. Has been placed.

  The second heat exchanger 5 includes a second heat exchange part (not shown) in which a plurality of tubes (not shown) are arranged in a short direction (vertical direction), and a longitudinal direction of the second heat exchange part. (Left-right direction) It has a pair of 2nd tank part 33 (The other 2nd tank part is not shown in figure) which was located in both sides and the edge part of the some tube was connected.

  The second heat exchanger 5 includes a pair of second tank portions 33 that are divided into two heat exchange portions up and down by a separator (not shown), and the first refrigerant flows into one of the second tank portions 33. This is a two-pass heat exchanger provided with an inlet 29 and a refrigerant outlet 35 for allowing the first refrigerant to flow out.

  In such a second heat exchanger 5, the first refrigerant outlet portion 21 of the first heat exchanger 3 is connected to the refrigerant inlet portion 29 so that the first refrigerant flows in, and the first refrigerant is supplied to the second heat exchange portion. The indoor unit inlet 37 connected to the indoor unit 201 (see FIG. 1) side is connected to the refrigerant outlet 35 to exchange heat with the cooling air, and the first refrigerant is introduced to the indoor unit 201 side. Spill.

  The third heat exchanger 7 is arranged on the upstream side of the cooling air flow of the fourth heat exchanger 9 and is arranged in the upper half region of the fourth heat exchanger 9 in a front view from the cooling air flow direction. Has been.

  The third heat exchanger 7 includes a third heat exchange unit 39 in which a plurality of tubes (not shown) are arranged in a short direction (vertical direction), and a longitudinal direction (left and right) of the third heat exchange unit 39. (Direction) It has a pair of 3rd tank parts 41 and 43 which were located in both sides and the edge part of the some tube was connected.

  The third heat exchanger 7 includes an electrical system component outlet (not shown) connected to the electrical system component 203 (see FIG. 1) side of the other third tank unit 43 of the pair of third tank units 41 and 43. ) Are connected to each other, and a one-pass heat exchanger provided with a refrigerant inlet portion (not shown) through which the second refrigerant flows in and a refrigerant outlet portion 31 through which the second refrigerant flows out into one third tank portion 41; It has become.

  In such a third heat exchanger 7, the second refrigerant flows into the refrigerant inlet portion from the electric system component 203 side, and the second refrigerant flows through the third heat exchange portion 39 to exchange heat with the cooling air. The second refrigerant inlet portion 23 of the first heat exchanger 3 is connected to the refrigerant outlet portion 31 so that the second refrigerant flows out to the first heat exchanger 3.

  The fourth heat exchanger 9 is disposed on the downstream side of the cooling air flow of the second heat exchanger 5 and the third heat exchanger 7, and the second heat exchanger 5 in a front view from the flow direction of the cooling air. And the third heat exchanger 7 are arranged in a region aligned in the vertical direction.

  The fourth heat exchanger 9 includes a heat exchange section 11 in which a plurality of tubes (not shown) are arranged in the short direction (vertical direction), and both sides of the heat exchange section 11 in the longitudinal direction (left and right direction). It has a pair of tank parts 13 and 15 which are located and the edge part of the some tube was connected.

  The fourth heat exchanger 9 is a third refrigerant in which an engine outlet portion (not shown) connected to the engine 205 (see FIG. 1) is connected to the other tank portion 15 of the pair of tank portions 13 and 15. This is a one-pass heat exchanger provided with a third refrigerant inlet portion 45 through which cooling water flows and a third refrigerant outlet portion 47 through which the third refrigerant flows out into one tank portion 13.

  In such a fourth heat exchanger 9, the third refrigerant flows into the third refrigerant inlet 45 from the engine 205, and the third refrigerant flows through the heat exchange unit 11 to exchange heat with the cooling air. Then, an engine inlet (not shown) connected to the engine 205 is connected to the third refrigerant outlet 47 so that the third refrigerant flows out to the engine 205.

  In such a composite heat exchanger 1, the first heat exchanger 3 is disposed on the fourth heat exchanger 9 side, and one side of the fourth heat exchanger 9 in a front view from the flow direction of the cooling air. It is arranged in the arrangement area of the tank part 13. In one tank portion 13 of the fourth heat exchanger 9 in the arrangement region of the first heat exchanger 3, an avoiding portion 17 for avoiding interference with the first heat exchanger 3 is provided.

  The avoidance part 17 is formed in an inclined shape that tapers so as to avoid interference with the first heat exchanger 3 from the lower side to the upper side of one tank part 13. By providing the avoidance portion 17 in this way, the first heat exchanger 3 and the one tank portion 13 do not interfere with each other, and one tank of the fourth heat exchanger 9 in the front view from the flow direction of the cooling air. The first heat exchanger 3 can be arranged in the arrangement region of the part 13.

  In addition, by arranging the first heat exchanger 3 in the avoidance unit 17, the first heat exchanger 3 does not greatly protrude from one side in the left-right direction of the composite heat exchanger 1, and the existing heat exchanger 3 The composite heat exchanger 1 can be arranged in the arrangement space, and the layout of the vehicle is not impaired. Furthermore, the refrigerant pipes of the first heat exchanger 3, the second heat exchanger 5, the third heat exchanger 7, and the fourth heat exchanger 9 can be connected to a fan with a relatively large space. It can be arranged on the shroud 49 side (downstream side of the cooling air), and the layout of the vehicle can be improved.

  In such a composite heat exchanger 1, the first heat exchanger 3 is disposed on the fourth heat exchanger 9 side, and one of the fourth heat exchangers 9 in a front view from the flow direction of the cooling air. Since it is arrange | positioned at the arrangement | positioning area | region of the tank part 13, the 1st heat exchanger 3 protrudes from the one side of the left-right direction of the 2nd heat exchanger 5, the 3rd heat exchanger 7, and the 4th heat exchanger 9. Can be suppressed.

  Therefore, the composite heat exchanger 1 can be used as a vehicle arrangement space without downsizing the heat exchanger 11 of the second heat exchanger 5, the third heat exchanger 7, and the fourth heat exchanger 9 in the left-right direction. The cooling effective area can be ensured and the cooling efficiency can be improved.

  Therefore, in such a composite heat exchanger 1, the cooling effective area can be maintained while disposing the first heat exchanger 3, and the cooling efficiency can be improved.

  Moreover, since the avoidance part 17 which avoids interference with the 1st heat exchanger 3 is provided in one tank part 13 of the 4th heat exchanger 9, the heat exchange part 11 of the 4th heat exchanger 9 is provided. The first heat exchanger 3 can be arranged without affecting the above.

  Further, since the third refrigerant cooled by the heat exchange unit 11 flows into one tank portion 13 of the fourth heat exchanger 9, it is disposed in the vicinity of the one tank portion 13 of the fourth heat exchanger 9. Thus, the first heat exchanger 3 does not receive heat from the high-temperature third refrigerant, and the durability of the first heat exchanger 3 can be improved. In addition, the first heat exchanger 3 is not involved in the inflow of the third refrigerant, and the avoidance portion 17 is provided in the fourth heat exchanger 9 without impairing the heat exchange performance of the fourth heat exchanger 9. Can do.

(Second Embodiment)
A second embodiment will be described with reference to FIGS.

  In the composite heat exchanger 101 according to the present embodiment, the first heat exchanger 3 is positioned on the downstream side of the cooling air from the one tank portion 13 of the fourth heat exchanger 9, and the avoiding portion 103 is Interference with the second communication portion 105 through which the second refrigerant communicates between the first heat exchanger 3 and the third heat exchanger 7 is avoided.

  The same components as those in the first embodiment are denoted by the same reference numerals, and the description of the configuration and functions will be omitted with reference to the first embodiment. The effect achieved is the same.

  As shown in FIGS. 6-8, the 1st heat exchanger 3 is arrange | positioned at the fan & shroud 49 side located in the downstream of a cooling air rather than the one tank part 13 of the 4th heat exchanger 9. FIG. The first heat exchanger 3 includes a second communication portion in which a second refrigerant inlet portion 23 (see FIG. 2) and a refrigerant outlet portion 31 (see FIG. 2) provided in the third heat exchanger 7 are pipes. 105 is connected through the third heat exchanger 7 so that the cooling water as the second refrigerant can flow into the first heat exchanger 3.

  One tank portion 13 of the fourth heat exchanger 9 where the second communication portion 105 that connects the first heat exchanger 3 and the third heat exchanger 7 is located has interference with the second communication portion 105. An avoidance unit 103 for avoiding is provided.

  The avoidance part 103 is formed so as to chamfer the corner of one tank part 13. By providing the avoidance part 103 in this way, the second communication part 105 that is a pipe and the one tank part 13 do not interfere with each other, and the fourth heat exchanger 9 in the front view from the flow direction of the cooling air is provided. The first heat exchanger 3 can be arranged in the arrangement region of the one tank portion 13.

  In addition, the first heat exchanger 3 is arranged on the fan & shroud 49 side having a relatively large arrangement space on the downstream side of the cooling air from the one tank portion 13 of the fourth heat exchanger 9 to provide the second communication. By disposing the part 105 in the avoidance part 103, it is possible to further suppress the first heat exchanger 3 from projecting from one side in the left-right direction of the composite heat exchanger 101. For this reason, it is possible to more effectively utilize the arrangement space of the existing composite heat exchanger of the vehicle, to secure a cooling effective area and improve the cooling efficiency, and to further improve the layout of the vehicle.

  In such a composite heat exchanger 101, the avoidance unit 103 avoids interference with the second communication unit 105 where the second refrigerant communicates between the first heat exchanger 3 and the third heat exchanger 7. The avoidance shape of the avoidance unit 103 can be reduced, and the influence on the one tank unit 13 of the fourth heat exchanger 9 due to the provision of the avoidance unit 103 can be minimized.

  As shown in FIG. 9, in addition to the avoidance unit 103 that avoids interference with the second communication unit 105 through which the second refrigerant communicates between the first heat exchanger 3 and the third heat exchanger 7, You may provide the avoidance part 103 which avoids interference with the 1st communication part 107 with which a 1st refrigerant | coolant communicates between the 1st heat exchanger 3 and the 2nd heat exchanger 5. FIG.

  Specifically, the first communication portion 107 includes a portion where an A / C refrigerant as the first refrigerant flows out provided in the first heat exchanger 3 and a refrigerant inlet portion 29 provided in the second heat exchanger 7. (Here, the first refrigerant outlet portion 21) is connected to form a pipe that allows the first refrigerant to flow from the first heat exchanger 3 to the second heat exchanger 5.

  The avoidance portion 103 that avoids interference with the first communication portion 107 is formed in a concave shape at the center of one tank portion 13. By providing the avoidance portion 103 in this way, the first communication portion 107 that is a pipe and the one tank portion 13 do not interfere with each other, and the fourth heat exchanger 9 is viewed from the front in the cooling air flow direction. In addition to the first heat exchanger 3, piping connected to the first heat exchanger 3 can also be arranged in the arrangement region of the one tank portion 13.

  Therefore, the first heat exchanger 3 does not protrude from one side in the left-right direction of the composite heat exchanger 101, and the effective space for cooling can be increased by effectively using the arrangement space of the existing composite heat exchanger of the vehicle. As a result, the cooling efficiency can be improved and the layout of the vehicle can be further improved.

  In the composite heat exchanger according to the embodiment of the present invention, the second heat exchanger, the third heat exchanger, and the fourth heat exchanger are one-pass and two-pass heat exchangers. However, it is not limited thereto, and for example, a 3-pass heat exchanger may be used.

  In addition, although the 2nd heat exchanger and the 3rd heat exchanger have a heat exchange part and a pair of tank parts, it is not restricted to this but does not have a pair of tank parts, and a heat exchange part The heat exchanger may be a system in which the ends of the tubes are communicated with each other.

  Further, the second heat exchanger is disposed on the lower side and the third heat exchanger is disposed on the upper side. However, the present invention is not limited to this, and the second heat exchanger is disposed on the upper side, and the third heat exchanger is disposed on the upper side. If the second heat exchanger, the third heat exchanger, and the fourth heat exchanger are arranged in two rows with respect to the cooling air flow, such as being arranged on the lower side, the second heat exchanger and The arrangement with the third heat exchanger may be any form.

  In addition, a fixing means or the like may be provided in the first heat exchanger, and the second heat exchanger and the third heat exchanger may be firmly connected and fixed via the first heat exchanger.

  Furthermore, the shape of the avoiding portion is not limited to the inclined shape, the chamfered shape, and the concave shape, and any shape that can avoid interference with the first heat exchanger or the communication portion, such as an L shape, is possible. Such a shape may be used.

1,101 ... Composite heat exchanger 3 ... First heat exchanger (water-cooled condenser)
5 ... Second heat exchanger (air-cooled condenser)
7 ... Third heat exchanger (sub-radiator)
9 ... 4th heat exchanger (main radiator)
DESCRIPTION OF SYMBOLS 11 ... Heat exchange part 13, 15 ... Tank part 17, 103 ... Avoidance part 105 ... 2nd communication part 107 ... 1st communication part

Claims (4)

Heat exchange is performed between the first heat exchanger (3) that exchanges heat between the first refrigerant and the second refrigerant, and the first refrigerant that flows out of the first heat exchanger (3) and the cooling air. A second heat exchanger (5) and a third heat exchanger (7) that exchanges heat between the second refrigerant and the cooling air and flows the second refrigerant into the first heat exchanger (3). And a fourth heat exchanger that is arranged downstream of the cooling air of the second heat exchanger (5) and the third heat exchanger (7) and exchanges heat between the cooling air and the third refrigerant. (9) a composite heat exchanger (1, 101) comprising:
The fourth heat exchanger (9) has a heat exchange part (11) and a pair of tank parts (13, 15) located on both sides of the heat exchange part (11) in the third refrigerant flow direction. And
The first heat exchanger (3) is arranged on the fourth heat exchanger (9) side, and one of the fourth heat exchangers (9) in a front view from the flow direction of the cooling air. The composite heat exchanger (1, 101), which is arranged in an arrangement region of the tank section (13). The composite heat exchanger (1, 101) according to claim 1,
One tank portion (13) of the fourth heat exchanger (9) is provided with an avoidance portion (17, 103) for avoiding interference with the first heat exchanger (3). A combined heat exchanger (1, 101). The composite heat exchanger (1, 101) according to claim 2,
The first heat exchanger (3) is located on the downstream side of the cooling air from one tank portion (13) of the fourth heat exchanger (9),
The avoidance part (103) includes a first communication part (107) through which the first refrigerant communicates between the first heat exchanger (3) and the second heat exchanger (5), and the first Interference with at least one of the communication parts (105) between which the second refrigerant communicates between the heat exchanger (3) and the third heat exchanger (7) is avoided. A composite heat exchanger (101) characterized in that. The composite heat exchanger (1, 101) according to any one of claims 1 to 3,
The composite heat exchanger (3), wherein the third refrigerant cooled by the heat exchange part (11) flows into one tank part (13) of the fourth heat exchanger (9). 1,101).

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