JP2014238214A - Combined heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined heat exchanger capable of improving layout performance, reducing an arrangement space (attachment space), and facilitating attachment to a vehicle body.SOLUTION: A second heat exchanger 21 and a third heat exchanger 31 are arranged in upper and lower sides on the same surface in a vertical direction, respectively. A lower side of the second heat exchanger 21 located on the upper side is coupled to an upper side of the third heat exchanger 31 located on the lower side to constitute a coupled heat exchanger B. The coupled heat exchanger B is arranged upstream of a first heat exchanger 11 in a cold air flow direction and attached integrally to the first heat exchanger 11.

Description

  The present invention relates to a composite heat exchanger mounted on a vehicle, for example, and more particularly to a composite heat exchanger with improved layout.

  As a combined heat exchanger mounted on an automobile, a first heat exchanger that exchanges heat between cooling water (first refrigerant) that cools the engine and cooling air, and a high-powered device (electric) that is mounted on the vehicle A second heat exchanger for exchanging heat between cooling water (second refrigerant) and cooling air for cooling a drive source and an on-vehicle electric device such as an inverter, an air conditioning refrigerant (third refrigerant), and cooling air And a third heat exchanger that exchanges heat between the two (for example, see Patent Document 1).

JP 2006-021749 A

  In the above-described conventional composite heat exchanger, each heat exchanger is individually attached to a vehicle, so that the arrangement space (attachment space) is widened and the attachment structure is complicated.

  The present invention has been made in order to eliminate the above-described disadvantages, and is a composite type that can improve layout and can reduce the arrangement space (mounting space) and can be easily mounted on the vehicle body. Provide heat exchanger.

  The composite heat exchanger of the present invention is characterized by a first heat exchanger that exchanges heat between the first refrigerant and the cooling air, and a second heat exchanger that exchanges heat between the second refrigerant and the cooling air. And a third heat exchanger that exchanges heat between the third refrigerant and the cooling air, wherein the second heat exchanger and the third heat exchanger are arranged in a vertical direction. The lower side of the heat exchanger located on the upper and lower side of the same plane and the upper side of the heat exchanger located on the lower side are connected to form a connected heat exchanger, and the connected heat exchanger is The first heat exchanger is disposed upstream of the cooling air and is integrally attached to the first heat exchanger.

  As another feature, the first heat exchanger has a first upper tank and a first lower tank above and below the first core portion, and the second heat exchanger is located on the left and right sides of the second core portion. A second left tank and a second right tank; the third heat exchanger includes a third left tank and a third right tank on the left and right of the third core portion; The second left tank and the second right tank are attached to the first upper tank or the first lower tank, and the third left tank and the third right tank are the first lower tank or the first tank. It is attached to the upper tank.

  As another feature, each of the first upper tank and the first lower tank has a plurality of engaged portions, and the second left tank and the second right tank have the engaged portions. A second engaging portion corresponding to a joint portion is provided, and a third engaging portion corresponding to the engaged portion is provided in the third left tank and the second right tank, and the second, The connection heat exchanger is attached to the first heat exchanger by engaging a third engagement portion with the engaged portion.

  As another feature, the first upper tank and the first lower tank are made of resin, and the plurality of engaged portions are integrally formed with the first upper tank and the first lower tank. It is characterized by.

  As another feature, the second left tank and the second right tank are made of resin, and the second engaging portion is integrally formed with the second left tank and the second right tank. To do.

  As another feature, a fourth heat exchanger is provided in the second left tank or the second right tank, and the fourth heat exchanger includes the second refrigerant before flowing into the second core portion. The third refrigerant that exchanges heat with the third refrigerant and flows out of the fourth heat exchanger flows into the third heat exchanger.

  As another feature, the second refrigerant inlet portion of the second heat exchanger and the third refrigerant inlet portion of the third heat exchanger are arranged on the same left and right sides.

  According to the composite heat exchanger of the present invention, the connected heat exchanger in which the second heat exchanger and the third heat exchanger are connected in the up-down position is integrally attached to the first heat exchanger. Therefore, the layout is improved, the arrangement space (mounting space) can be narrowed, and the mounting to the vehicle body can be easily performed.

1 is a perspective view showing a composite heat exchanger according to a first embodiment of the present invention. It is a perspective view showing a sub radiator before connection and an air cooling capacitor. It is a perspective view which shows a connection heat exchanger and a main radiator. It is a reverse view which shows the downstream of a main radiator. It is explanatory drawing for attaching a connection heat exchanger to a main radiator. It is a perspective view which shows a connection heat exchanger and a main radiator of the composite-type heat exchanger which is 2nd Example of this invention. It is a perspective view which shows a connection heat exchanger and a main radiator of the composite heat exchanger which is 3rd Example of this invention. It is a perspective view which shows a connection heat exchanger and a main radiator of the composite heat exchanger which is 4th Example of this invention. 1 is a configuration diagram of a vehicle heat exchange system to which a composite heat exchanger of the present invention is applied.

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

  A vehicle heat exchange system 1 to which the composite heat exchanger of the present invention is applied includes a main radiator (first heat exchanger) 11, a sub-radiator (second heat exchanger) 21, as shown in FIG. 9. The air-cooled condenser (third heat exchanger) 31 and the water-cooled condenser (fourth heat exchanger) 41 are provided.

  The main radiator 11 is disposed on the upstream side of the cooling air from the motor fan 2.

  The main radiator 11 cools cooling water (first refrigerant) that cools the engine 3.

  Cooling water for cooling the engine 3 is circulated by the pump 4.

  The sub radiator 21 is disposed on the upstream side of the cooling air with respect to the main radiator 11.

  The sub-radiator 21 cools cooling water (second refrigerant) that cools the high-voltage equipment 5 (on-vehicle electrical equipment such as an electric drive source and an inverter).

  The sub-radiator 21 does not necessarily need to cool the cooling water that cools the high-voltage equipment 5, and may cool the cooling water (second refrigerant) that cools the water-cooled charge air cooler (water-cooled CAC).

  Cooling water that cools the high-voltage equipment 5 is circulated by the pump 6.

  The air cooling condenser 31 is disposed upstream of the cooling air with respect to the main radiator 11.

  The air-cooling condenser 31 cools the air-conditioning refrigerant (third refrigerant).

  The water cooling condenser 41 cools the air conditioning refrigerant (third refrigerant).

  The air-cooled condenser 31 and the air-cooled condenser 41 are connected in series in the refrigeration cycle with the water-cooled condenser 41 as the upstream.

  The air-conditioning refrigerant that has been brought to high temperature and high pressure by the compressor (compressor) of the refrigeration cycle first flows into the water-cooled condenser 41 and then flows out into the air-cooled condenser 31.

  A composite heat exchanger according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 3, the main radiator 11 includes a horizontally long core portion (first core portion) 12, an upper tank (first upper tank) 13 provided above and below the core 12 portion, And a tank (first lower tank) 14.

  The upper tank 13 is made of resin, and a plurality of locking claws (engaged portions) 13a, for example, two on the upstream side (windward side, front side) are integrally formed, and the refrigerant inlet portion (first The refrigerant inlet portion 13b is provided by integral molding so as to protrude downstream (leeward side, rearward), extends upward (upward), and is provided with a plate-like air guide 13c integrally formed in the left-right direction. ing.

  Thereby, the cooling air which does not go through the connection heat exchanger B mentioned later from a vehicle front opening can be guide | induced to the main radiator 11 effectively.

  The lower tank 14 is made of resin, and a plurality of locking pieces (engaged portions) 14a having locking holes, for example, two on the left and right sides of the upstream side are integrally formed, and a refrigerant outlet portion (first A refrigerant outlet portion 14b (see FIG. 4) is provided by integral molding so as to protrude downstream, extends to the upstream side, and has a plate-like air guide 14c integrally formed in the left-right direction.

  And the plate-shaped air guide 15a, 15b extended in the up-down direction is provided in the right-and-left end of the core part 12 toward the connection heat exchanger B side mentioned later.

  The main radiator 11 includes a core 12 in a process in which the refrigerant flowing from the refrigerant inlet 13b of the upper tank 13 flows out of the refrigerant outlet 14b after flowing into the upper tank 13, the core 12, and the lower tank 14. The heat exchange is performed between the refrigerant and the cooling air.

  As shown in FIG. 2, the sub-radiator 21 includes a horizontally-long rectangular core part (second core part) 22, a left tank (second left tank) 23 provided on the left and right sides of the core 22 part, and a right tank. (Second right tank) 24.

  The left tank 23 is made of resin, and an engaging claw (second engaging portion) 23 a that engages with the left engaging claw 13 a of the upper tank 13 of the main radiator 11 is integrally formed on the left tank 23. The connecting bracket having a mounting hole 23d, which is integrally formed on the side surface facing the upper end of the left tank 23 or the core portion 22 and extends downward from the lower end, for example, the refrigerant inlet portion (second refrigerant inlet portion) 23b. 23c is provided by integral molding.

  The right tank 24 is made of resin, and an engagement claw (second engagement portion) 24 a that engages with the right engagement claw 13 a of the upper tank 13 of the main radiator 11 is integrally formed on the right tank 24. The refrigerant outlet portion (second refrigerant outlet portion) 24b is integrally formed on, for example, the upper end or the side surface of the right tank 24, and the connection bracket 24c having a mounting hole 24d extending downward from the lower end is integrally formed. It has been.

  A water-cooled condenser 41 is accommodated in the left tank 23.

  The sub-radiator 21 is configured so that the refrigerant flowing from the refrigerant inlet 23b of the left tank 23 flows into the left tank 23, the core 22 and the right tank 24, and then flows out of the refrigerant outlet 24b. Heat exchange is performed between the refrigerant and the cooling air.

  In the left tank 23, heat exchange is performed between the second refrigerant before flowing into the core portion 22 and the third refrigerant flowing into the water-cooled condenser 41.

  Of course, if necessary, the cooling water (second refrigerant) of the sub-radiator 21 may flow in a direction opposite to the above direction.

  For example, the cooling water of the sub-radiator 21 may flow from the refrigerant outlet portion 24b, and after flowing through the core portion 22, may flow out of the refrigerant inlet portion 23b.

  In this case, the water-cooled condenser 41 is cooled by the cooling water after being cooled by the core portion 22 of the sub-radiator 21.

  Further, the refrigerant inlet portion of the water-cooled condenser 41 in this embodiment can be provided at the upper end or the side surface of the left tank 23, and similarly, the refrigerant outlet portion of the water-cooled condenser 41 is provided at the side surface or lower end of the right tank 23. Can do.

  As shown in FIG. 2, the air-cooled condenser 31 includes a horizontally long core portion (third core portion) 32 and inflow / outflow tanks (left tank, third left tank) provided on the left and right sides of the core 32 portion. 33, an outflow / inflow tank (right tank, third right tank) 34.

  The core part 32 is vertically divided into an upper core part 32a and a lower core part 32b.

  The inflow / outflow tank 33 is divided into upper and lower portions corresponding to the upper core portion 32a and the lower core portion 32b, and an inflow portion (third refrigerant inlet portion) 33a located on the upper side and an outflow located on the lower side. Part (third refrigerant outlet part) 33b.

  An engagement piece (third engagement portion) 33c that engages with the left engagement piece 14a of the lower tank 14 of the main radiator 11 is in a bracket manner at the lower end of the inflow / outflow tank 33 (outflow portion 33b). Is provided.

  When the air-cooled condenser 31 and the sub-radiator 21 are fixed, the connection is made by tightening a screw or the like passed through a mounting hole 23 d provided in the connection bracket 23 c provided in the left tank 23 of the sub-radiator 21 to the inflow / outflow tank 33. The bracket 23 c is fixed to the inflow / outflow tank 33.

  Of course, in order to better fix the air-cooling condenser 31 and the sub-radiator 21, the connection bracket 23c is provided on both the windward side and the leeward side of the inflow / outflow tank 33 of the air-cooling condenser 31, and is attached from both the windward side and the leeward side. A screw or the like passing through the hole 23d may be crimped to the inflow / outflow tank 33.

  The outflow / inflow tank 34 has an outflow portion 34a located on the upper side and an inflow portion 34b located on the lower side, which are divided into upper and lower portions corresponding to the upper core portion 32a and the lower core portion 32b.

  An engagement piece (third engagement portion) 34c that engages with the right engagement piece 14a of the lower tank 14 of the main radiator 11 is provided in a bracket manner at the lower end of the outflow / inflow tank 34 (inflow portion 34b). It has been.

  Further, in fixing the air-cooling condenser 31 and the sub-radiator 21, a screw or the like passed through a mounting hole 24 d provided in the connection bracket 24 c provided in the right tank 24 of the sub-radiator 21 is provided from the upstream side of the cooling air, or The connecting bracket 24 c is fixed to the outflow / inflow tank 34 by crimping the outflow / inflow tank 34 from both the upstream side and the downstream side.

  The outflow / inflow tank 34 is connected to the outflow portion 34a and the inflow portion 34b with a liquid tank 61 (see FIG. 3) for gas-liquid separation of the refrigerant.

  The liquid tank 61 is attached to the connection bracket 24 c of the sub radiator 21, but may be attached to the outflow / inflow tank 34 of the air cooling condenser 31.

  In the air-cooled condenser 31, the refrigerant flowing from the inflow portion 33 a of the outflow inflow tank 33 through the water-cooled condenser 41 flows to the upper core portion 32 a, the outflow portion 34 a of the outflow inflow tank 34, and the liquid tank 61. In the core part 32 (upper core part 32a, lower core part 32b) in the process of flowing out from the inflow part 34b via the lower core part 32b from the inflow part 34b after the gas-liquid separation in the refrigerant and cooling air Exchange heat with.

  Next, the assembly of the composite heat exchanger A will be described.

  First, as shown in FIG. 2, for example, as shown in FIG. 2, the sub radiator 21 and the air cooling condenser 31 are positioned on the upper side of the same plane in the vertical direction, and the air cooling condenser 31 is positioned on the lower side.

  And the sub radiator 21 and the air-cooling capacitor | condenser 31 are connected using the attachment holes 23d and 24d of a connection bracket 23c, 24c, a volt | bolt, etc. FIG.

  In this case, as described above, the tanks 33 and 34 of the air-cooled condenser 31 may be fixed by caulking on one side, or may be fixed by caulking both sides, but other fixing methods are used instead of caulking. May be.

  Then, as shown in FIG. 3, the water-cooled condenser 41 and the inflow portion 33 a of the air-cooled condenser 31 are connected by a pipe 51 to further fix the sub-radiator 21 and the air-cooled condenser 31.

  The sub-radiator 21 and the air-cooled condenser 31 fixed as described above are referred to as a connected heat exchanger B, and are positioned on the upstream side of the cooling air with respect to the main radiator 11, and as shown in FIG. The engaging piece 34c is engaged with the right engaging piece 14a, the engaging claw 23a is engaged with the left engaging claw 13a, and the engaging claw 24a is engaged with the left engaging piece 14a. When the coupled heat exchanger B (sub-radiator 21 and air-cooled condenser 31) is integrally attached to the main radiator 11 by engaging with the right latching claw 13a, a composite heat exchanger A shown in FIG. 1 is obtained. .

  The composite heat exchanger A assembled in this way is attached to the vehicle body using, for example, an attachment bracket provided on the main radiator 11 (not shown).

  According to the first embodiment of the present invention, the connection heat exchanger B composed of the sub radiator 21 and the air cooling condenser 31 is integrally attached to the main radiator 11, so that the layout is improved and the arrangement space (installation space) is improved. ) Becomes narrower and can be easily attached to the vehicle body.

  Further, the left and right tanks 23 and 24 of the sub-radiator 21 are attached to the upper tank 13 of the main radiator 11, and the inflow / outflow tank 33 and the outflow / inflow tank 34 of the air cooling condenser 31 are attached to the lower tank 14 of the main radiator 11. Since the connected heat exchanger B is attached to the main radiator 11, that is, since the sub-radiator 21 and the air cooling condenser 31 are integrally attached to the main radiator 11, the layout is improved and the arrangement space (installation space) is narrow. At the same time, it can be easily attached to the vehicle body.

  Further, by engaging the engaging claws 23a and 24a of the sub radiator 21 and the engaging pieces 33c and 34c of the air-cooling condenser 31 with the engaging claws 13a and the engaging pieces 14a of the main radiator 11, the coupled heat exchanger B is connected. Since it can attach to the main radiator 11, attachment of the connection heat exchanger B to the main radiator 11 can be performed easily.

  Further, the upper tank 13 and the lower tank 14 of the main radiator 11 are made of resin, and the locking claws 13a, the locking pieces 14a, and the air guides 13c, 14c are integrally formed with the upper tank 13 and the lower tank 14. The upper tank 13, the lower tank 14, the locking claw 13a, the locking piece 14a, and the air guides 13c, 14c can be molded at once, and the locking claw 13a, the locking piece 14a, and the air guides 13c, 14c are manufactured separately. The manufacturing process is simplified.

  Further, the left tank 23 and the right tank 24 of the sub-radiator 21 are made of resin, and the engaging claws 23a and 24a and the connecting brackets 23c and 24c are integrally formed with the left tank 23 and the right tank 24. The right tank 24, the engaging claws 23a, 24a and the connecting brackets 23c, 24c can be molded at a time, and the engaging claws 23a, 24a and the connecting brackets 23c, 24c are manufactured separately, and it is not necessary to attach them separately. The process becomes simple.

  Further, a water-cooled condenser 41 is provided in the left tank 23 of the sub-radiator 21, and between the second refrigerant flowing in the left tank 23 (before entering the core portion 22) and the third refrigerant flowing in the water-cooled condenser 41. Since the third refrigerant flowing out from the water-cooled condenser 41 is caused to flow into the air-cooled condenser 31, the third refrigerant is cooled by the second refrigerant, so that the air-cooled condenser 31 efficiently cools the third refrigerant. can do.

  In addition, since the refrigerant inlet 23b of the sub radiator 21 and the inflow / outflow tank 33 (inflow portion 33a) of the air cooling condenser 31 are arranged on the same side in the left-right direction, that is, the refrigerant flow direction of the sub radiator 21 and air cooling. Since the flow direction of the refrigerant in the condenser 31 is the same, the heat effect between the sub-radiator 21 and the air-cooled condenser 31 can be minimized.

  Further, since the air guides 13a, 13b, 15a, 15b are provided, the cooling air can be efficiently guided to the main radiator 11 and the like, and the refrigerant can be efficiently cooled by the main radiator 11 and the like.

  A composite heat exchanger according to a second embodiment of the present invention will be described with reference to FIG.

  A difference between the composite heat exchanger A of the second embodiment and the composite heat exchanger A of the first embodiment is that, as shown in FIG. 6, the sub-radiator 21 has a horizontally long rectangular core portion (second (Core part) 22 and a left tank (second left tank) 25 and a right tank (second right tank) 24 provided on the left and right sides of the core 22 part.

  The left tank 25 is made of resin, and an engaging claw (second engaging portion) 25 a that engages with the left engaging claw 13 a of the upper tank 13 of the main radiator 11 is integrally formed with the left tank 25. A mounting hole (not shown) is provided, and the refrigerant inlet portion (second refrigerant inlet portion) 25b is integrally formed, for example, on the upper surface of the left tank 25 or the side surface facing the core portion 22 and extends downward from the lower end. ) Having a connecting bracket 25c.

  A water-cooled condenser is not accommodated in the left tank 25.

  The main radiator 11 and the air cooling condenser 31 are configured in the same manner as the main radiator 11 and the air cooling condenser 31 of the first embodiment.

  Therefore, the coupled heat exchanger B can be assembled as described in the first embodiment, and a combined heat exchanger A can be obtained by attaching the coupled heat exchanger B to the main radiator 11. .

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

  A composite heat exchanger A according to a third embodiment of the present invention will be described with reference to FIG.

  The composite heat exchanger A according to the third embodiment is different from the composite heat exchanger A according to the first embodiment in that the main radiator 11 has a horizontally long core (the first portion shown in FIG. 7). A core part) 12, a left tank (first left tank) 16 and a right tank (first right tank) 17 provided on the left and right sides of the core 12 part.

  The left tank 16 is made of resin, a locking claw (engaged portion) 16a is integrally formed on the upstream side, and a refrigerant inlet portion (first refrigerant inlet portion) 16b is on the downstream side of the cooling air. It is provided by integral molding so as to protrude, and of course, it may be provided so as to protrude to the side surface.

  A locking piece (engaged portion) 16c having a locking hole is integrally formed on the lower side of the left tank 16 on the upstream side of the cooling air, and extends to the upstream side of the cooling air and extends in the vertical direction. A plate-like air guide 16 d is provided in the left tank 16 by integral molding.

  The right tank 17 is made of resin, a locking claw (engaged portion) 17a is integrally formed on the upstream side, and a refrigerant outlet portion (first refrigerant outlet portion) 17b is on the downstream side of the cooling air. It is provided by integral molding so as to protrude, and of course, it may be provided so as to protrude to the side surface.

  A locking piece (engaged portion) 17c having a locking hole is integrally formed on the lower side of the right side tank 17 on the upstream side of the cooling air, and extends to the upstream side and extends in the vertical direction. An air guide 17d is provided by integral molding.

  And, at the upper and lower ends of the core portion 12, a plate-like air guide 18a extending upward and extending in the left-right direction, and a plate-like air guide 18b extending in the left-right direction while extending upstream (windward, forward). And are provided.

  The air guides 16d and 17d are preferably wider than the width of the coupled heat exchanger B toward the coupled heat exchanger B side.

  The main radiator 11 is configured so that the refrigerant flowing from the refrigerant inlet portion 16b of the left tank 16 flows into the left tank 16, the core portion 12, and the right tank 17, and then flows out from the outlet portion 17b with the refrigerant. The heat exchange is performed between the refrigerant and the cooling air.

  The sub radiator 21, the air cooling condenser 31, the water cooling condenser 41, and the connection heat exchanger B are configured and arranged in the same manner as in the first embodiment.

  Therefore, the coupled heat exchanger B can be assembled as described in the first embodiment, and a combined heat exchanger A can be obtained by attaching the coupled heat exchanger B to the main radiator 11. .

  According to the third embodiment, the left and right tanks 23 and 24 of the sub radiator 21 are attached to the left and right tanks 16 and 17 of the main radiator 11, and the inflow / outflow tank 33 and the outflow / inflow tank 34 of the air-cooling condenser 31 are installed. Since the connected heat exchanger B is attached to the main radiator 11 by being attached to the left and right tanks 16 and 17 of the main radiator 11, that is, the sub-radiator 21 and the air cooling condenser 31 are integrally attached to the main radiator 11. The layout is improved, the arrangement space (attachment space) is reduced, and attachment to the vehicle body can be easily performed.

  Further, the engaging claw 23a, 24a of the sub radiator 21 and the engaging pieces 33c, 34c of the air cooling condenser 31 are engaged with the engaging claws 16a, 17a, the engaging pieces 16c, 17c of the main radiator 11, thereby connecting heat. Since the exchanger B can be attached to the main radiator 11, the connection heat exchanger B can be easily attached to the main radiator 11.

  Further, the left tank 16 and the right tank 17 of the main radiator 11 are made of resin, and the locking claws 16a and 17a, the locking pieces 16c and 17c, and the air guides 16d and 17d are integrally formed with the left tank 16 and the right tank 17. Therefore, the left tank 16, the right tank 17, the locking claws 16a and 17a, the locking pieces 16c and 17c and the air guides 16d and 17d can be molded at one time, and the locking claws 16a and 17a and the locking pieces 16c and 17c are formed. In addition, since the air guides 16d and 17d need not be manufactured separately or attached separately, the manufacturing process is simplified.

  Further, the left tank 23 and the right tank 24 of the sub-radiator 21 are made of resin, and the engaging claws 23a and 24a and the connecting brackets 23c and 24c are integrally formed with the left tank 23 and the right tank 24. The right tank 24, the engaging claws 23a, 24a and the connecting brackets 23c, 24c can be molded at a time, and the engaging claws 23a, 24a and the connecting brackets 23c, 24c are manufactured separately, and it is not necessary to attach them separately. The process becomes simple.

  Further, a water-cooled condenser 41 is provided in the left tank 23 of the sub-radiator 21, and between the second refrigerant flowing in the left tank 23 (before entering the core portion 22) and the third refrigerant flowing in the water-cooled condenser 41. Since the third refrigerant flowing out from the water-cooled condenser 41 is caused to flow into the air-cooled condenser 31, the third refrigerant is cooled by the second refrigerant, so that the air-cooled condenser 31 efficiently cools the third refrigerant. can do.

  Further, since the refrigerant inlet portion 16b of the main radiator 21 and the refrigerant inlet portion 23b of the sub radiator 21 are arranged on the same side in the left-right direction, that is, the refrigerant flow direction of the main radiator 11 and the refrigerant flow of the sub radiator 21 Since the flow direction is the same, the heat effect of the main radiator 11 and the sub radiator 21 can be minimized.

  Further, since the inflow / outflow tank 33 (inflow portion 33a) of the air cooling condenser 31 is arranged on the same side in the left-right direction as the refrigerant inlet portion 16b of the main radiator 11 and the refrigerant inlet portion 23b of the sub radiator 21, that is, the main radiator. 11, the refrigerant flow direction of the sub-radiator 21, and the refrigerant flow direction of the air-cooling condenser 31 are the same direction, so that the thermal effects of the main radiator 11, the sub-radiator 21, and the air-cooling condenser 31 are minimized. be able to.

  Further, since the air guides 16d, 17d, 18a and 18b are provided, the cooling air can be guided to the main radiator 11 and the like, and the refrigerant can be efficiently cooled by the main radiator 11 and the like.

  A composite heat exchanger A according to a fourth embodiment of the present invention will be described with reference to FIG.

  The combined heat exchanger A of the fourth embodiment is different from the combined heat exchanger A of the third embodiment in that the connected heat exchanger B is the connected heat exchanger B of the second embodiment.

  Therefore, the coupled heat exchanger B can be assembled as described in the third embodiment, and a combined heat exchanger A can be obtained by attaching the coupled heat exchanger B to the main radiator 11. .

  According to the fourth embodiment, the same effect as that of the third embodiment can be obtained.

  In the above embodiment, the air guides 13c and 14c are provided integrally with the upper and lower tanks 13 and 14, and the air guides 16d and 17d are provided integrally with the left and right tanks 16 and 17, respectively. The air guide may be separate from the upper and lower tanks 13 and 14 and the left and right tanks 16 and 17.

  Moreover, although the example of the connection heat exchanger B which has arrange | positioned the sub radiator 21 on the upper side and has arrange | positioned the air-cooling condenser 31 to the lower side was shown, the connection heat which has arrange | positioned the sub radiator on the lower side and has arranged the air-cooling condenser on the upper side It may be an exchanger.

  In this case, the air-cooled condenser arranged on the upper side is provided with the third left tank and the third right tank on the left and right sides of the core part in order to suppress the thermal influence with the sub radiator, and the refrigerant is the third left tank, the core part, 3 It is desirable to flow to the right tank.

  Moreover, although the to-be-engaged part was made into locking claw 13a, 16a, 17a or locking piece 14a, 16c, 17c, and the engaging part was made into engaging claw 23a, 24a or engaging piece 33c, 34c, the example was shown. The engaging claw (engaged portion) may be engaged with an engaging rod (engaging portion) or an engaging bracket (engaging portion).

  Moreover, although the example which provided the water cooling condenser 41 in the left side tank 23 of the sub radiator 21 was shown, you may provide a water cooling condenser in the right side tank of a sub radiator.

  In the third and fourth embodiments, the sub-radiator 21 and the air-cooled condenser 31 are connected to the main radiator 11 after forming the connected heat exchanger B. However, the sub-radiator 21 and the air-cooled condenser 31 are connected to the heat exchanger. The sub-radiator 21 and the air-cooled condenser 31 may be separately attached to the main radiator 11 by the locking members such as the locking claws or the engagement pieces described above without using the device B.

A Combined heat exchanger B Linked heat exchanger 11 Main radiator (first heat exchanger)
12 Core part (first core part)
13 Upper tank (first upper tank)
13a Locking claw (engaged part)
13b Refrigerant inlet (first refrigerant inlet)
13c Air guide 14 Lower tank (first lower tank)
14a Locking piece (engaged part)
14b Refrigerant outlet (first refrigerant outlet)
14c Air guide 15a Air guide 15d Air guide 16 Left tank (first left tank)
16a Locking claw (engaged part)
16b Refrigerant inlet (first refrigerant inlet)
16c Locking piece (engaged part)
16d Air guide 17 Right tank (first right tank)
17a Locking claw (engaged part)
17b Refrigerant outlet (first refrigerant outlet)
17c Locking piece (engaged part)
17d Air guide 18a Air guide 18b Air guide 21 Sub-radiator (second heat exchanger)
22 Core part (second core part)
23 Left tank (second left tank)
23a engagement claw (second engagement portion)
23b Refrigerant inlet (second refrigerant inlet)
23c Connecting bracket 23d Mounting hole 24 Right tank (second right tank)
24a engaging claw (second engaging portion)
24b Refrigerant outlet (second refrigerant outlet)
24c Connecting bracket 24d Mounting hole 25 Left tank (second left tank)
25a engaging claw (second engaging portion)
25b Refrigerant inlet (second refrigerant inlet)
25c Connecting bracket 31 Air-cooled condenser (third heat exchanger)
32 Core part (third core part)
32a Upper core portion 32b Lower core portion 33 Inflow / outflow tank (left tank, third left tank)
33a Inflow part (third refrigerant inlet part)
33b Outflow part (third refrigerant outlet part)
33c engagement piece (3rd engagement part)
34 Outflow inflow tank (Right side tank, 3rd right side tank)
34a Outflow part 34b Inflow part 34c Engagement piece (3rd engagement part)
41 Water-cooled condenser (4th heat exchanger)
51 Piping 61 Liquid tank

Claims (7)

A first heat exchanger (11) that exchanges heat between the first refrigerant and cooling air, a second heat exchanger (21) that exchanges heat between the second refrigerant and cooling air, and a third refrigerant In the composite heat exchanger (A) including the third heat exchanger (31) for exchanging heat with the cooling air,
The second heat exchanger (21) and the third heat exchanger (31) are arranged above and below the same plane in the vertical direction and are located below and below the heat exchanger (21) located on the upper side. And the upper side of the heat exchanger (31) located in is connected to the connected heat exchanger (B),
The connected heat exchanger (B) is disposed on the upstream side of the cooling air from the first heat exchanger (11) and is integrally attached to the first heat exchanger (11).
A composite heat exchanger (A) characterized by the above. In the combined heat exchanger (A) according to claim 1,
The first heat exchanger (11) has a first upper tank (13) and a first lower tank (14) above and below the first core part (12),
The second heat exchanger (21) has a second left tank (23, 25) and a second right tank (24) on the left and right of the second core part (22),
The third heat exchanger (31) has a third left tank (33) and a third right tank (34) on the left and right of the third core part (32),
In the coupled heat exchanger (B), the second left tank (23, 25) and the second right tank (24) are attached to the first upper tank (13) or the first lower tank (14). The third left tank (33) and the third right tank (34) are attached to the first lower tank (14) or the first upper tank (13),
A composite heat exchanger (A) characterized by the above. In the combined heat exchanger (A) according to claim 2,
The first upper tank (13) and the first lower tank (14) are each provided with a plurality of engaged portions (13a, 14a),
The second left tank (23, 25) and the second right tank (24) are provided with second engaging portions (23a, 24a, 25a) corresponding to the engaged portions (13a, 14a). And
The third left tank (33) and the second right tank (34) are provided with third engaging portions (33a, 34a) corresponding to the engaged portions (13a, 14a),
By engaging the second and third engaging portions (23a, 24a, 25a, 33a, 34a) with the engaged portions (13a, 14a), the coupled heat exchanger (B) is allowed to perform the first heat. Attached to the exchanger (11),
A composite heat exchanger (A) characterized by the above. In the combined heat exchanger (A) according to claim 3,
The first upper tank (13) and the first lower tank (14) are made of resin,
The plurality of engaged portions (13a, 14a) are integrally formed with the first upper tank (13) and the first lower tank (14).
A composite heat exchanger (A) characterized by the above. In the combined heat exchanger (A) according to claim 3 or 4,
The second left tank (23, 25) and the second right tank (24) are made of resin,
The second engaging portions (23a, 24a, 25a) are integrally formed with the second left tank (23, 25) and the second right tank (24).
A composite heat exchanger (A) characterized by the above. In the composite heat exchanger (A) according to any one of claims 1 to 5,
A fourth heat exchanger (41) is provided in the second left tank (23) or the second right tank (24),
The fourth heat exchanger (41) performs heat exchange between the second refrigerant and the third refrigerant before flowing into the second core part (22),
The third refrigerant flowing out from the fourth heat exchanger (41) flows into the third heat exchanger (31).
A composite heat exchanger (A) characterized by the above. In the composite heat exchanger (A) according to any one of claims 1 to 6,
The second refrigerant inlet portion (23b, 25b) of the second heat exchanger (21) and the third refrigerant inlet portion (33a) of the third heat exchanger (31) are arranged on the same left and right sides. Yes,
A composite heat exchanger (A) characterized by the above.

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