JP2015158302A - Combined heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined heat exchanger in which a second heat exchanger and a third heat exchanger are disposed upstream of a first heat exchanger, capable of improving the cooling performance of one of the second heat exchanger and the third heat exchanger.SOLUTION: According to the present invention, the combined heat exchanger comprises: the first heat exchanger implementing heat exchange with air; the second heat exchanger disposed at a position upstream of the first heat exchanger and implementing heat exchange with the air; and the third heat exchanger disposed at a position that is upstream of the first exchanger and that does not overlap the position of the second heat exchanger and implementing heat exchange with the air, the first to third heat exchangers each including a plurality of tubes disposed to be spaced apart and corrugated fins provided between the adjacent tubes, the first to third heat exchangers each implementing heat exchange between the air passing through the heat exchanger and each refrigerant flowing in the tubes, a fin interval of the first heat exchanger in a region facing the second heat exchanger being set different from a fin interval of the first heat exchanger in a region facing the third heat exchanger.

Description

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

  Various composite heat exchangers have been proposed in the past as shown in FIGS.

  As shown in FIG. 6, the cooling cycle 100 in which the composite heat exchanger is used includes an engine E that is a driving source of the vehicle, a driving circuit 101 that controls driving of an electronic device and the like disposed in the vehicle, and cooling of the refrigerant. And a first pump P1 and a second pump P2 that drive circulation of the refrigerant.

  As shown in FIG. 7, the heat exchanger 102 includes a main radiator 103 that cools the engine E, a sub-radiator 105 that cools the drive circuit 101, and a condenser 104 that cools the refrigerant.

  The main radiator 103 includes a pair of left and right tanks 106, a plurality of tubes (not shown) that connect the tanks 106, and fins that are arranged between the tubes. 106a and the refrigerant | coolant exit part 106b are provided.

  The sub-radiator 105 is disposed on the upstream side of the cooling air of the main radiator 103, and includes a pair of tanks 112, tubes 113, and fins 114 in the same manner as the main radiator 103. Each of the pair of tanks 112 has a refrigerant inlet. A portion 112a and a refrigerant outlet portion 112b are provided.

  The capacitor 104 is disposed on the upstream side of the cooling air of the main radiator 103 and is disposed in parallel with the sub radiator 105. Similarly to the main radiator 103 and the sub radiator 105, the condenser 104 also includes a pair of tanks 109, tubes 110, and fins 111. The pair of tanks 109 has a refrigerant inlet 109a and a refrigerant outlet, respectively. 109b.

  In the cooling cycle 100 using such a composite heat exchanger, when the first pump P1 is driven, the refrigerant through the engine E flows into the one tank 106 from the refrigerant inlet 106a of the main radiator 103, and passes through the tube. Then, the refrigerant flows into the other tank 106, the refrigerant from the other tank 106 via the refrigerant outlet 106b flows into the first pump P1, and the refrigerant circulates between the engine E and the main radiator 103. Further, when the refrigerant flows through the tube of the main radiator 103, the refrigerant is cooled by exchanging heat with the cooling air.

  Further, when the second pump P2 is driven, the refrigerant through the drive circuit 101 flows into the one tank 112 from the refrigerant inlet 112a of the sub radiator 105, and the refrigerant flows into the other tank 112 through the tube 113. The refrigerant from the other tank 112 via the refrigerant outlet 112b flows into the second pump P2, and the refrigerant circulates between the drive circuit 101 and the sub radiator 105.

  Further, the refrigerant compressed by a compressor (not shown) flows into one tank 109 from the refrigerant inlet 109a of the condenser 104, flows into the other tank 109 via the tube 110, and flows from the other tank 109 to the refrigerant outlet. The refrigerant flows to an evaporator (not shown) via 109b. Further, when the refrigerant flows through the tube 110, the refrigerant flowing in the condenser 104 is cooled by exchanging heat with the cooling air.

  In addition, as disclosed in Patent Document 2, the composite heat exchanger 102 mounted on the hybrid vehicle has more parts mounted on the vehicle than the conventional automobile, and thus saves space in the heat exchanger. Therefore, an air conditioning condenser and a sub-radiator are arranged on the upstream side of the cooling air of the main radiator.

JP 2004-262330 A JP 2006-21749 A

  In the conventional composite heat exchanger 102, the condenser 104 and the sub-radiator 105 are arranged in parallel, and are arranged vertically so as to have an area substantially equal to that of the main radiator 103.

  However, there is a case where it is desired to improve the cooling performance of one of the capacitor 104 and the sub radiator 105. For example, since a large number of electrical products are mounted on a vehicle when mounted on a hybrid vehicle, the driving circuit needs to be cooled more than before, and the high cooling performance of the sub-radiator 105 through which the refrigerant that cools the driving circuit flows. There was a problem that was required.

  So, in this invention, in the composite heat exchanger which has arrange | positioned the 2nd heat exchanger and the 3rd heat exchanger in the cooling wind upstream of the 1st heat exchanger, either of a 2nd heat exchanger and a 3rd heat exchanger. It aims at providing the composite heat exchanger which can improve one cooling performance.

  In order to solve the above-described problems, in the present invention, the first heat exchanger 2 that exchanges heat with air, and the upstream position of the first heat exchanger 2 in the air flow direction, Between the second heat exchanger 4 for exchanging heat between the first heat exchanger 2 and the first heat exchanger 2 at a position upstream of the second heat exchanger 4 in the air flow direction. And a third heat exchanger 3 that performs heat exchange in the first to third heat exchangers 2, 3, and 4. 15 and 21 and corrugated fins 11, 17, 23 provided between the adjacent tubes 9, 15, 21, the air passing through the first to third heat exchangers 2, 3, 4 and the tubes 9, Heat exchange is performed with each of the refrigerants flowing through the insides of the first and second refrigerants 21, 21. A fin spacing of the heat exchanger 2, characterized in that made different from the first fin spacing of the heat exchanger 2 in the region facing the third heat exchanger 3. In addition, the distance between the fins 11 </ b> A in the region A of the first heat exchanger 2 facing the second heat exchanger 4 is the fin in the region B of the first heat exchanger 2 facing the third heat exchanger 3. It is characterized by being larger than the interval of 11B. Further, the distance between the fins 11 </ b> B in the region B of the first heat exchanger 2 facing the third heat exchanger 3 is such that the fins in the region A of the first heat exchanger 2 facing the second heat exchanger 4. It is characterized by being larger than the interval of 11A. In addition, the first to third heat exchangers 2, 3, 4 have a pair of tanks 7, 13, 19 at both ends of the tubes 9, 15, 21, respectively, and the pair of tanks 7, 13, 19 Have substantially the same width. Furthermore, the pair of tanks 13 and 19 of the second heat exchanger 4 and the third heat exchanger 3 are fixed to the tank of the first heat exchanger 2. Furthermore, the first heat exchanger (2) is a main radiator that cools engine coolant, the second heat exchanger (4) is a condenser, and the third heat exchanger (3) is A sub-radiator for cooling the on-vehicle electronic component cooling water.

  According to the present invention, in the region where the fin interval of the first heat exchanger 2 is widened, the air resistance passing through the composite heat exchanger 1 is small, so the second heat exchanger or the second heat exchanger disposed in that region The cooling performance of the three heat exchanger can be improved.

It is a disassembled perspective view of the composite heat exchanger of this invention. It is a disassembled front view of the main radiator of this invention. It is a front side perspective view of the composite heat exchanger of this invention. It is a back side perspective view of the compound heat exchanger of this invention. It is a schematic side view of the composite heat exchanger of this invention. It is the schematic of the cooling cycle using the conventional composite heat exchanger. It is a perspective view of the conventional composite heat exchanger.

  Hereinafter, embodiments and modifications of the present invention will be described in detail with reference to FIGS.

Embodiment
As shown in FIGS. 1 to 5, the composite heat exchanger 1 used in the cooling cycle includes a main radiator 2, a condenser 3 disposed on the cooling air upstream side of the main radiator 2, and the cooling air upstream side of the main radiator 2. And a sub-radiator 4 disposed above the capacitor 3.

  As shown in FIG. 2, the main radiator 2 includes a pair of tanks 7, a plurality of tubes 9 connecting the pair of tanks 7, and fins 11 (11 </ b> A and 11 </ b> B) disposed between the plurality of tubes 9. I have.

  The pair of tanks 7 are disposed in the left-right direction with respect to the cooling air blowing direction. The tank 7 on one side of the pair of tanks 7 is formed with a refrigerant inlet portion 7a, and the tank 7 on the other side is formed. A refrigerant outlet portion 7b is formed.

  The fin 11 (11A, 11B) is formed in a wave shape between the tubes 9. As shown in FIG. 1, the corrugated fin interval (hereinafter referred to as “fin pitch”) is different between the A region and the B region, and the fin pitch P2 of the fin 11A in the A region is the fin of the fin 11B in the B region. The width of the waveform is formed wider than the pitch P1.

  A fin pitch similar to that used in the conventional main radiator is applied to the fin 11B in the region B. The fin 11A in the region A only needs to be wider than the fin pitch in the region B. The design can be changed as appropriate.

  The A region is a region facing a sub radiator 4 described later, and the B region is a region facing a capacitor 3 described later.

  The condenser 3 disposed on the upstream side of the cooling air of the main radiator 2 includes a pair of tanks 13, a plurality of tubes 15 connecting the pair of tanks 13, and a waveform disposed so as to be stacked between the plurality of tubes 15. Fin 17.

  The pair of tanks 13 of the condenser 3 are respectively formed with a refrigerant inlet and a refrigerant outlet (not shown).

  The sub-radiator 4 disposed on the cooling air upstream side of the main radiator 2 and above the condenser 3 includes a pair of tanks 19, a plurality of tubes 21 connecting the pair of tanks 19, and a plurality of tubes 21. And corrugated fins 23 arranged so as to be stacked on each other. The tank 19 on one side of the pair of tanks 19 is formed with a refrigerant inlet 19a, and the tank 19 on the other side is formed with a refrigerant outlet 19b.

  The connecting bracket 6 is fixed by bolts so as to connect the tank 13 of the capacitor 3, the sub-radiator 4 and the tank 19, and is liquid so as to straddle between the tank 13 of the capacitor 3 and the tank 19 of the sub-radiator 4. The tank 5 is fixed.

  Next, cooling of the refrigerant flowing in the composite heat exchanger 1 of the present embodiment will be described.

  Refrigerant through an engine or the like (not shown) flows into the tank 7 on one side from the refrigerant inlet 7 a and flows into the tank 7 on the other side from the tank 7 through the tube 9. The refrigerant flowing into the tank 7 on the other side flows from the refrigerant outlet portion 7b to an engine or the like (not shown).

  Refrigerant compressed by a compressor (not shown) flows into a tank 13 on one side from a refrigerant inlet (not shown), and flows into the tank 13 on the other side from the tank 13 via a tube 15. The refrigerant flowing into the tank 13 on the other side flows from the refrigerant outlet (not shown) to the evaporator (not shown) via the liquid tank 5.

  Refrigerant through a drive circuit (not shown) flows into the tank 19 on one side from the refrigerant inlet 19a and flows into the tank 19 on the other side from the tank 19 through the tube 21. The refrigerant flowing into the tank 19 on the other side flows from the refrigerant outlet portion 19b to a drive circuit (not shown).

  When the refrigerant flows through the tubes 9, 15, and 21 of the main radiator 2, the condenser 3, and the sub-radiator 4, the cooling air is supplied to the tubes 9, 15, and 21 and the fins 11, 17, and 23 as shown in FIG. By passing through, heat exchange is performed between the refrigerant flowing in the tubes 9, 15, and 21 and the cooling air, thereby cooling the refrigerant.

  According to the present embodiment, the interval between the waveforms of the fins 11 </ b> A in the A region facing the sub radiator 4 of the main radiator 2 is made larger than the B region facing the capacitor 3 of the main radiator 2. Since the ventilation resistance of the cooling air passing through the region A is reduced, the wind speed of the cooling air passing through the sub radiator 4 is increased.

  That is, heat exchange between the refrigerant flowing in the sub radiator 4 and the cooling air is promoted, and the refrigerant flowing in the sub radiator 4 can be sufficiently cooled, so that the cooling performance can be improved. The fin pitch P2 of the main radiator 2 is wider than the fin pitch P1, but the cooling air passing through the sub-radiator 4 is faster than the conventional heat exchanger due to the reduction in ventilation resistance. As a result, the cooling performance can be ensured comparable to the conventional one without reducing the amount of heat radiation in the sub radiator 4.

  Furthermore, the tank 7 of the main radiator 2 and the tanks 13 and 19 of the sub-radiator 4 and the condenser 3 are fixed, so that the layout can be improved, and further, when the composite heat exchanger 1 is attached to the vehicle. Fixing is easy.

  In the present embodiment, the sub radiator 4 and the condenser 3 are described in the vertical direction (top and bottom direction) with respect to the cooling air blowing direction. They may be arranged in a direction (perpendicular to the vertical direction). When the sub radiator and the capacitor are arranged in the left-right direction, the fin pitch of the main radiator region facing the sub radiator may be increased as in the present embodiment.

  Further, a water-cooled condenser may be arranged in the tank 19 of the sub radiator 4, and the refrigerant can be cooled more effectively by arranging the water-cooled condenser in the tank 19.

[Modification]
In the embodiment described above, in order to improve the cooling performance of the sub radiator 4, the fin pitch of the main radiator 2 facing the sub radiator 4 is widened. However, in this modification, the cooling performance of the capacitor 3 can be improved. it can. That is, in order to improve the cooling performance of the capacitor 3, the fin pitch of the main radiator 2 facing the capacitor 3 may be formed wide.

  In other words, according to the present modification, the wind speed of the cooling air passing through the region of the main radiator 2 facing the condenser 3 can be increased, so that the refrigerant flowing through the condenser 3 is cooled by the cooling air passing through the condenser 3. It can be cooled sufficiently.

1 Combined heat exchanger 2 1st heat exchanger (main radiator)
3 Third heat exchanger (condenser)
4 Second heat exchanger (sub-radiator)

In order to solve the above problems, the present invention, a main radiator 2 for exchanging heat between the air and the engine cooling water is arranged upstream position in the air flow direction of the main radiator 2, the air-vehicle electronic The sub-radiator 4 that exchanges heat with the component coolant and the upstream position of the main radiator 2 in the air flow direction are arranged at positions that do not overlap the sub-radiator 4 and exchange heat with air. A composite heat exchanger 1 including a condenser 3 , wherein the main radiator 2, the condenser 3, and the sub-radiator 4 include a plurality of tubes 9, 15, and 21 arranged at intervals, and the adjacent tubes with fins 11,17,23 waveform provided between the 9,15,21, the main radiator 2 passes through the condenser 3 and the sub-radiator 4 Perform each heat exchange between the refrigerant flowing in the the air tube 9,15,21, fin spacing 11A of the main radiator 2 in the area A opposed to the sub-radiator 4 is opposed to the capacitor 3 The distance between the fins 11B in the region B of the main radiator 2 is larger . The front Symbol main radiator 2, the condenser 3 and the sub-radiator 4 has a respective pair of tanks 7,13,19 both ends of the tube 9,15,21, a pair of the tank 7,13,19 Have substantially the same width. Furthermore, a pair of tanks 13, 19 of the sub-radiator 4 and the capacitor 3, characterized in that fixed to the tank of the main radiator 2.

According to the present invention, in the region where the fin interval of the main radiator 2 is widened, the air resistance passing through the composite heat exchanger 1 becomes small, so that the cooling performance of the sub radiator 4 arranged in that region is improved. Can do.

Claims (6)

A first heat exchanger (2) for exchanging heat with air;
A second heat exchanger (4) disposed at an upstream position in the air flow direction of the first heat exchanger (2) and exchanging heat with air;
A third heat exchanger (positioned upstream of the first heat exchanger (2) in the air flow direction so as not to overlap the second heat exchanger (4) and exchanging heat with air. 3) a composite heat exchanger (1) comprising:
The first to third heat exchangers (2, 3, 4) include a plurality of tubes (9, 15, 21) arranged at intervals,
Corrugated fins (11, 17, 23) provided between the adjacent tubes (9, 15, 21),
Heat exchange is performed between the air passing through the first to third heat exchangers (2, 3, 4) and the refrigerant flowing through the tubes (9, 15, 21), respectively.
The fin interval of the first heat exchanger (2) in the region facing the second heat exchanger (4) and the first heat exchanger (2 in the region facing the third heat exchanger (3). The composite heat exchanger (1) characterized in that the fin interval is different. A composite heat exchanger (1) according to claim 1,
The space | interval of the fin (11A) of the area | region (A) of the said 1st heat exchanger (2) facing the said 2nd heat exchanger (4) is 1st heat which faces the said 3rd heat exchanger (3). A composite heat exchanger (1) characterized in that it is larger than the distance between the fins (11B) in the region (B) of the exchanger (2). A composite heat exchanger (1) according to claim 1,
The space | interval of the fin (11B) of the area | region (B) of the said 1st heat exchanger (2) which opposes the said 3rd heat exchanger (3) is 1st heat which opposes the said 2nd heat exchanger (4). A composite heat exchanger (1) characterized in that it is larger than the spacing of the fins (11A) in the region (A) of the exchanger (2). A composite heat exchanger (1) according to any one of claims 1 to 3,
The first to third heat exchangers (2, 3, 4) have a pair of tanks (7, 13, 19) at both ends of the tubes (9, 15, 21), respectively. , 13, 19) are combined heat exchangers (1), characterized by having substantially the same width. It is a composite heat exchanger (1) as described in any one of Claims 1-4, Comprising:
The pair of tanks (13, 19) of the second heat exchanger (4) and the third heat exchanger (3) are fixed to the tank of the first heat exchanger (2). Composite heat exchanger (1). A composite heat exchanger (1) according to any one of claims 1 to 5,
The first heat exchanger (2) is a main radiator that cools engine coolant.
The second heat exchanger (4) is a condenser;
The composite heat exchanger (1), wherein the third heat exchanger (3) is a sub-radiator for cooling the on-vehicle electronic component cooling water.

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