WO2016104068A1

WO2016104068A1 - Heat exchanger

Info

Publication number: WO2016104068A1
Application number: PCT/JP2015/083697
Authority: WO
Inventors: 浩隆門; 金子　智; 祐介飯野
Original assignee: サンデンホールディングス株式会社
Priority date: 2014-12-26
Filing date: 2015-12-01
Publication date: 2016-06-30
Also published as: JP6465651B2; CN107110620A; DE112015005788T5; JP2016125671A

Abstract

[Problem] To provide a heat exchanger configured so as to make the temperature of discharge air more uniform. [Solution] A heat exchanger (1) is formed by stacking two or more heat exchange modules (2) in the air flow direction (X), the two or more heat exchange modules (2) allowing a refrigerant to flow therethrough. Each of the heat exchange modules is provided with: a pair of upper and lower header tanks (4, 6) arranged so as to be vertically separated from each other; and a plurality of tubes (8) extending parallelly between the upper and lower header tanks and each having opposite ends connected to the insides, respectively, of the upper and lower header tanks. The plurality of tubes forms a core (12) for exchanging heat between the refrigerant and air flow. Each of the heat exchange modules at least includes: a flow dividing module (30) which partitions the core into a plurality of paths, divides, within the header tanks, the flow of the refrigerant, and has a divided-flow core section (38) through which the divided flows of the refrigerant flow; and a flow combining module (32) for combining, within the header tanks, the flows of the refrigerant, which have flowed through the divided-flow core section, and causing the combined flows of the refrigerant to flow to the core. The flow dividing module is located downwind of the flow combining module in the air flow direction.

Description

Heat exchanger

The present invention relates to a heat exchanger, and more particularly to a heat exchanger suitable as an evaporator used in a refrigerant circuit of a vehicle air conditioner.

Patent Documents

1 and 2 disclose heat exchangers formed by overlapping two or three heat exchange modules in which a refrigerant flows in the ventilation direction. Each heat exchange module includes a pair of upper and lower header tanks that are spaced apart from each other, and a plurality of tubes that extend in parallel between the upper and lower header tanks and both ends communicate with each other inside the upper and lower header tanks, The plurality of tubes form a core that performs heat exchange between the refrigerant and the ventilation.

JP-A-6-194001 JP-A-8-233406

Each of the conventional heat exchangers has a core that divides the core into a tube group (hereinafter referred to as a path) composed of a plurality of tubes, divides the refrigerant in the header tank, and distributes the divided refrigerant. By configuring the heat exchange module with the diversion module, the temperature of the air blown out through the heat exchanger is made uniform.
However, each of the conventional heat exchangers described above has special considerations regarding the detailed path allocation configuration of the shunt module, the path allocation configuration of the heat exchange modules other than the shunt module, and the arrangement of the heat exchange modules including the shunt module in the ventilation direction. However, there is still a problem in order to reduce the variation in the temperature of the blown air in the heat exchanger and achieve a more uniform blown air temperature.

This invention is made | formed in view of such a subject, The place made into the objective is to provide the heat exchanger which can implement | achieve further equalization of blowing air temperature.

In order to achieve the above object, the heat exchanger of the present invention is a heat exchanger formed by stacking two or more heat exchange modules in which the refrigerant flows in the ventilation direction, and each heat exchange module is spaced apart vertically. A pair of upper and lower header tanks, and a plurality of tubes extending in parallel between the upper and lower header tanks and having both ends communicating with the inside of the upper and lower header tanks, respectively. Each of the heat exchange modules is divided into a plurality of paths, the refrigerant is divided in a header tank, and a branch module having a branch core portion through which the divided refrigerant flows, and And a merging module that circulates the refrigerant that has flowed through the diverting core unit in the header tank and distributes it to the core, and the diverting module is positioned leeward in the ventilation direction than the merging module. It is.

Preferably, the shunt core portion is positioned at a position that is symmetrical with respect to the center in the longitudinal direction of the upper and lower header tanks.
Preferably, the merge module is formed in one pass that does not divide the core.
Preferably, each heat exchange module includes three or more modules including a diversion and merging module, and a pre-division module that is positioned downstream of the diversion module and flows before the diversion of the refrigerant that circulates through the diversion module. The module before diversion is formed by one pass that does not divide the core.

Preferably, a refrigerant inlet pipe and an outlet pipe for the heat exchanger are further provided, and both the inlet pipe and the outlet pipe are connected to either one of the upper and lower header tanks.
Preferably, each heat exchange module is stacked in an odd number in the ventilation direction.
Preferably, the upper and lower header tanks form an upper header tank coupling body and a lower header tank coupling body by front and rear header tanks arranged in the ventilation direction, and at least one of the upper and lower header tank coupling bodies is disposed inside the front and rear header tanks. A partition plate that communicates with each other and forms a refrigerant flow path between the heat exchange modules, and a partition plate that divides the header tank by at least one of the left and right sides of the communication portion, and divides the core into a plurality of parts to flow the refrigerant. The diversion and merging module is formed by arranging the communication part and the partition plate.

Preferably, the diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank and a descending path flowing from the upper header tank to the lower header tank, and the ascending path is When the header tank of the merging module communicates with the header tank via the plurality of communication portions, the ascending path in the diversion module has a larger number than the descending path. On the other hand, when the descending path communicates with the header tank of the merging module via the plurality of communicating portions, the descending path in the diversion module has a larger number than the ascending path.

Preferably, the diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank and a descending path flowing from the upper header tank to the lower header tank, and the ascending path is When communicating with the header tank of the merging module via the one communicating portion, the number of ascending paths in the diversion module is one. On the other hand, when the descending path is communicated with the header tank of the merging module via the one communicating portion, the number of descending paths in the diversion module is one.

According to the heat exchanger of the present invention, the blown air temperature can be further uniformized.

It is a perspective view of the heat exchanger which concerns on one Embodiment of this invention. It is a front view of the heat exchanger shown in FIG. FIG. 3 is an enlarged view of a region S shown in FIG. 2. FIG. 3 is a perspective view in which a part of the lower header tank coupling body shown in FIG. 2 is enlarged from below. It is the side view seen from the ventilation direction of the communicating member shown in FIG. It is a schematic diagram which shows the pass division of the heat exchanger which concerns on 1st Embodiment of this invention for every (a) pre-division module, (b) diversion module, and (c) merge module from the downwind. It is the photograph which looked at the blowing air temperature made uniform by the pass division structure of FIG. 6 from the back surface of the heat exchanger. It is a schematic diagram which shows the pass division of the heat exchanger which concerns on 2nd Embodiment of this invention for every (a) pre-division module, (b) diversion module, and (c) merge module from the downwind. It is a schematic diagram which shows the pass division of the heat exchanger which concerns on 3rd Embodiment of this invention for every (a) diversion module, (b) confluence module, and (c) module after confluence from the downwind. It is a mimetic diagram showing pass division of a heat exchanger concerning a 4th embodiment of the present invention for every (a) branch module, (b) merge module, and (c) post-merging module from the downwind. It is a mimetic diagram showing pass division of a heat exchanger concerning a 5th embodiment of the present invention for every (a) pre-division module, (b) diversion module, and (c) merge module from the downwind. It is a mimetic diagram showing pass division of a heat exchanger concerning a 6th embodiment of the present invention for every (a) pre-division module, (b) diversion module, and (c) merge module in order from the downwind. It is a mimetic diagram showing pass division of a heat exchanger concerning a 7th embodiment of the present invention for every (a) 1st diversion module, (b) 2nd diversion module, and (c) merge module in order from the downwind. It is a mimetic diagram showing pass division of a heat exchanger concerning an 8th embodiment of the present invention for every (a) 1st diversion module, (b) 2nd diversion module, and (c) merge module in order from the downwind.

Hereinafter, the heat exchanger 1 which concerns on one Embodiment of this invention is demonstrated with reference to drawings.
FIG. 1 shows a perspective view of the heat exchanger 1, and FIG. 2 shows a front view of the heat exchanger 1. The heat exchanger 1 forms, for example, a refrigeration cycle of a vehicle air conditioner, is incorporated in a refrigerant circuit in which high-pressure carbon dioxide refrigerant circulates, and is used as an evaporator during operation of the vehicle air conditioner.

As shown in FIG. 1 and FIG. 2, the heat exchanger 1 has three heats of an upwind (front side) module 2A, a central module 2B, and a downwind (rear side) module 2C in order from the upwind of the ventilation A indicated by the arrows. The exchange module 2 is formed so as to overlap in the ventilation direction X. Ventilation A is vehicle interior air (inside air) or vehicle interior air (outside air).

FIG. 3 is an enlarged view of the region S in FIG. As shown in FIGS. 2 and 3, each heat exchange module 2 includes a pair of upper header tank 4 and lower header tank 6 that are spaced apart from each other in the vertical direction, and the upper and

lower header tanks

4, 6 are parallel to each other. A plurality of flat tubes 8 that extend and have both ends communicating with the inside of the upper and

lower header tanks

4 and 6 are provided. The upper and

lower header tanks

4 and 6 are formed in a cylindrical shape (round pipe shape) having the same diameter.

Both ends of each tube 8 are joined to the upper and

lower header tanks

4 and 6 by brazing, and corrugated fins 10 are arranged between the tubes 8. Each fin 10 is joined to the flat surface of the tube 8 which opposes by brazing, and the ventilation flow path of the ventilation A in the heat exchange module 2 is formed.

The heat exchange module 2 has tubes 8 and fins 10 arranged alternately in the horizontal direction to form a core 12 that performs heat exchange between the refrigerant and the ventilation A. That is, the windward module 12A, the central module 2B, and the leeward module 2C are formed with the windward core 12A, the central core 12B, and the leeward core 12C, respectively. The left and right side surfaces of these cores 12 are each covered and protected by a single side plate 14.

As shown in FIG. 1, the open ends of the upper header tanks 4 A, 4 B, 4 C adjacent to the ventilation direction X of the different heat exchange modules 2 are integrated with each other. The upper header tank connecting body 4U is formed by closing the lid member 16 and connecting the

upper header tanks

4A, 4B, 4C. A refrigerant inlet pipe 18 and an outlet pipe 20 are connected to one of the lid members 16. The inlet pipe 18 communicates with the leeward upper header tank 4C, and the outlet pipe 20 communicates with the leeward upper header tank 4A.

On the other hand, the opening ends of the

lower header tanks

6A, 6B, and 6C on the windward (front side), center, and leeward (rear side) adjacent to each other in the ventilation direction X of the different heat exchange modules 2 are respectively closed with an integral lid member 22. As a result, a lower header tank connecting body 6L connecting the

lower header tanks

6A, 6B, 6C is formed. With the formation of the upper and lower

header tank connectors

4U and 6L, the cores 12, and thus the heat exchange modules 2 are connected.

FIG. 4 is a perspective view in which a part of the lower header tank coupling body 6L is enlarged from below. As shown in FIG. 4, a communication member (communication portion) 24 is disposed between the

lower header tanks

6A, 6B, 6C along the longitudinal direction Y of the lower header tank coupling body 6L. The communication member 24 communicates with the inside of each of the lower header tanks (front and rear header tanks) 6 before and after the communication member 24, and the refrigerant flow path from the leeward core 12C to the central core 12B and from the central core 12B to the windward core 12A. Is forming.

FIG. 5 is a side view of the communication member 24 viewed from the ventilation direction X. As shown in FIG. 5, the communication member 24 includes a long plate portion 24 a extending in the longitudinal direction Y, and a communication tube 24 b protruding in pairs from both side surfaces of the long plate portion 24 a with the long plate portion 24 a interposed therebetween. ing. A plurality of communication pipes 24b are arranged along the longitudinal direction Y.

Further, as shown in FIG. 4, a partition plate 26 is provided in the lower header tank 6B at a position that becomes a boundary between different communication members 24. The partition plate 26 is inserted into an insertion hole (not shown) formed on the bottom surface of the lower header tank 6B, and joined to the lower header tank 6B by brazing from the outside of the lower header tank 6B. The partition plate 26 is disposed in order to partition the inside of the lower header tank 6 with at least one of the left and right sides of the communication member 24 and to divide the core 12 into a plurality of paths and to flow the refrigerant.

As described above, the communication member 24 and the partition plate 26 are appropriately disposed in the lower header tank connecting body 6L, whereby the counter flow type refrigerant longitudinal flow in which each core 12 is divided and the refrigerant is sequentially flowed is converted into the heat exchanger 1. Can be realized. Thus, efficient heat exchange can be performed between the ventilation A that is passed through each core 12 and the refrigerant that flows through each of the cores 12 that are divided by pass.

Furthermore, in the present embodiment, the variation in the temperature of the air blown through the heat exchanger 1 is reduced by considering the path split configuration of the heat exchange module 2 and the arrangement of the heat exchange modules 2 in the ventilation direction X. In addition, the air temperature can be made even more uniform. Hereinafter, the path allocation configuration of each embodiment applied to the heat exchanger 1 will be described.

<First Embodiment>
Drawing 6 is a mimetic diagram showing the pass division of heat exchanger 1 concerning a 1st embodiment of the present invention. As shown in FIG. 6, the heat exchange module 2 of the present embodiment includes, from the leeward, three heat exchange modules 2 including (a) the pre-division module 28, (b) the diversion module 30, and (c) the merge module 32. It is configured.

The pre-split module 28 is the leeward (rear) module 2C, and is positioned leeward in the ventilation direction X with respect to the shunt module 30. The pre-division module 28 includes a leeward core 12C and upper and

lower header tanks

4C and 6C. The leeward core 12C is formed in one pass that is not divided. A communication member 24A communicates with the center in the longitudinal direction of the lower header tank 6C, and an inlet pipe 18 is connected to the upper header tank 4C. The refrigerant that has flowed into the upper header tank 4C from the inlet pipe 18 flows down the leeward core 12C, flows into the lower header tank 6C, and flows into the diversion module 30 via the communication member 24A provided in the lower header tank 6C. The That is, the refrigerant before diversion of the refrigerant flowing through the diversion module 30 flows through the pre-division module 28.

The diversion module 30 is the central module 2 B and is positioned leeward in the ventilation direction X from the merging module 32. The diversion module 30 has a central core 12B and upper and

lower header tanks

4B and 6B. In the lower header tank 6B, two partition plates 26 are arranged in the longitudinal direction, and each partition plate 26 divides the center and left and right spaces in the lower header tank 6B.

On the other hand, the central core 12B is divided into three paths, a central rising path that communicates with the central space in the lower header tank 6B, and a left and right downward path that communicates with the left and right spaces, respectively. A portion 38 is formed.
Each of the diversion core portions 38 is positioned at a position that is symmetrical with respect to the center in the longitudinal direction of the upper and

lower header tanks

4B and 6B.

The communication member 24A described above is communicated with the central space in the lower header tank 6B, and the

communication members

24B and 24B forming the refrigerant flow paths toward the merge module 32 are respectively provided in the left and right spaces in the lower header tank 6B. It is communicated. The refrigerant that has flowed up from the central space of the lower header tank 6B, which is a rising path, flows into the upper header tank 4B, and the refrigerant that has been divided into the left and right in the upper header tank 4B is the left and right downward paths. After flowing down the diversion core portion 38 and flowing into the left and right spaces in the lower header tank 6B, the flow flows into the merge module 32 via the

communication members

24B and 24B.

The confluence module 32 is the windward module 2A, and has the windward core 12A and the upper and

lower header tanks

4A and 6A. The windward core 12A is formed in one pass that is not divided. The

communication members

24B and 24B described above are communicated with the left and right sides of the lower header tank 6A in the longitudinal direction, respectively, and the outlet pipe 20 is connected to the upper header tank 4A. After flowing through the diversion core portion 38, which is the lowering path of the diversion module, the refrigerant that has flowed into the lower header tank 6A via the

communication members

24B and 24B is merged in the lower header tank 6A and ascends the upwind core 12A. , Flows into the upper header tank 4A and flows out from the outlet pipe 20.

As described above, in the heat exchanger 1 of the present embodiment, the diversion module 30 is positioned leeward in the ventilation direction X with respect to the merging module 32 and positioned upstream of the merging module 32 in terms of refrigerant flow. The refrigerant having a lower heat load flows than the refrigerant flowing through the merge module 32. On the other hand, the refrigerant having a higher heat load flows through the merge module 32 as compared with the diversion module 30.

That is, after the refrigerant is diverted in the diversion module 30 in which the refrigerant having a low heat load circulates, the refrigerant is merged in the merge module 32 in which the refrigerant having a high heat load circulates. Considering the characteristics of the refrigerant different for each heat exchange module 2, the heat exchanger 1 is obtained by ventilating the merge module 32, the diversion module 30, and the pre-division module 28 in this order and exchanging heat with the ventilation A in stages. It is possible to reduce the variation in the blown air temperature and to make the blown air temperature more uniform.

Specifically, as is apparent from the blown air temperature seen from the back surface of the heat exchanger 1 in FIG. 7, a high-temperature portion 40 that is substantially symmetric is formed on the top of the heat exchanger 1. A low temperature portion 42 having no temperature unevenness is also formed in the lower portion of 1. Actually, in the heat exchanger 1 of the present embodiment, it has been experimentally found that the difference between the maximum temperature and the minimum temperature of the blown air temperature is reduced from about 1/3 to about 1/4 of the conventional temperature.

Further, since each of the diversion core portions 38 is positioned at a symmetrical position with respect to the center in the longitudinal direction of the upper and

lower header tanks

4B and 6B, the blown air temperature can be further uniformized. Specifically, by forming the diversion core portion 38 that becomes an ascending path in the central region of the central core 12B, and by forming the diversion core portion 38 that becomes a descending path in a region that occupies the same area across the ascent path, Heat exchange with the ventilation A in the diversion module 30 can be performed as much as possible without temperature unevenness.

Further, by forming the confluence module 32 in one pass without dividing it by the upwind core 12A, the pressure loss of the refrigerant immediately before flowing out of the heat exchanger 1 can be reduced as much as possible. Therefore, the heat exchanger 1 and the vehicle The thermal efficiency of the refrigerant circuit of the air conditioner for a vehicle can be further increased.

Further, the pre-division module 28 is formed in one pass without dividing the leeward core 12C. Since the leeward core 12C is likely to affect the temperature of the finally blown-out air, the airflow temperature can be made more uniform by forming this in one pass.
Further, by connecting the inlet pipe 18 and the outlet pipe 20 to the

upper header tanks

4C and 4A, respectively, the space for installing the heat exchanger 1 can be saved.

In addition, by stacking two or more odd numbers (three in this embodiment) in the ventilation direction of each heat exchange module 2, both the inlet pipe 18 and the outlet pipe 20 are either one of the upper and lower header tanks. Can be reliably arranged.
Further, the diversion core portion 38 in the diversion module 30 of this embodiment is classified into an ascending path flowing from the lower header tank 6B to the upper header tank 4B and a descending path flowing from the upper header tank 4B to the lower header tank 6B. The number of descending paths (down arrow in FIG. 6B: 2) is larger than the number of up paths (up arrow in FIG. 6B: 1).

As in this embodiment, when the descending path of the ascending and descending paths is communicated with the lower header tank 6A of the merging module 32 via the plurality of communicating members 24B, the number of descending paths is greater than the ascending path. By being large, the refrigerant from the diversion module 30 can be circulated to the one-pass confluence module 32 by the two communication members 24B that are larger than the one communication member 24A. Therefore, compared with the case where the diversion and merging

modules

30 and 32 are communicated with one communication member 24A, the refrigerant can flow through each tube 8 of the merging module 32 evenly. Can be made more uniform.

Although the description of the first embodiment of the present invention has been completed above, the present invention is not limited to the first embodiment, and various modifications can be made without departing from the spirit of the present invention. Specifically, it is possible to perform the pass allocation of each embodiment shown below on the heat exchanger 1.

Second Embodiment
For example, as shown in FIG. 8, the number of the communication members 24 (24A, 24B) and the partition plates 26, and the number of the flow dividing core portions 38 constituting the flow dividing module 30, are compared with the case of the first embodiment (FIG. 6). And can be increased.

<Third Embodiment>
Further, as shown in FIG. 9, the communication member 24 (24 A, 24 B) and the partition plate 26 may be appropriately disposed, and the connection portion of the inlet pipe 18 may be changed so that the pre-division module 28 is not formed. it can. In this case, the leeward module 2C is used as the diversion module 30, the central module 2B is used as the merging module 32, and the one-path upwind module 2A having no path split on the upwind is formed as the post-merging module 44. May be.

Further, in the case of the present embodiment, unlike the case of the first embodiment (FIG. 6), the diversion core part 38 in the diversion module 30 has the number of rising paths (upward arrows in FIG. 9A: two). Is less than the number of descending paths (down arrow in FIG. 9A: one). However, when the ascending path of the ascending and descending paths communicates with the upper header tank 6B of the merging module 32 via the plurality of communicating members 24A as in the case of the present embodiment, the ascending path is more than the descending path. When the number is large, the refrigerant from the diversion module 30 can be circulated to the one-pass merge module 32 by the two communication members 24A that are larger than the one communication member 24B. Therefore, compared with the case where the diversion and merging

modules

30 and 32 are communicated with one communication member 24B, the refrigerant can flow through each tube 8 of the merging module 32 evenly. Can be made more uniform.

<Fourth embodiment>
Further, as shown in FIG. 10, the number of the communication members 24 (24A, 24B) and the partition plates 26, and the number of the diversion core portions 38 constituting the diversion module 30 are compared with the case of the third embodiment (FIG. 9). And can be increased. In this case, the inlet pipe 18 is a branched pipe branched into three, but even in this case, the temperature of the blown air of the heat exchanger 1 can be made uniform at least as compared with the prior art. .

<Fifth Embodiment>
Further, as shown in FIG. 11, unlike the case of the first embodiment (FIG. 6), a diversion core portion 38 that becomes a descending path is formed in the central region of the central core 12B, and the diversion core portion 38 that becomes an ascending path is formed. It is also possible to form it in a region that occupies substantially the same area of the central core 12B with the shunt core portion 38 serving as a downward path interposed therebetween.

In the present embodiment, the number of descending paths in the diversion module 30 is one and the number of ascent paths is two. The rising path of the rising and lowering paths is communicated with the upper header tank 6A of the merge module 32 via one communication member 24B. As described above, since the number of the descending paths of the diversion module 30 communicating with one communication member 24B is one, the increase in the refrigerant flow velocity due to the narrowing of the refrigerant flow area causes the increase in the refrigerant flow rate in the upper header tank 6A. Since the refrigerant spreads in the lateral direction and becomes easy to flow, the refrigerant can flow evenly through the tubes 8 of the merge module 32 as compared with the case where the diversion and merge

modules

30 and 32 are communicated by the two communication members 24A. Therefore, it is possible to make the blown air temperature of the heat exchanger 1 more uniform.

<Sixth Embodiment>
In addition, as shown in FIG. 12, the number and arrangement of the communication members 24 (24A, 24B) and the partition plates 26 are changed, and as a result, the number of flow dividing core portions 38 constituting the flow dividing module 30 is changed to the case of the fifth embodiment ( It is possible to increase compared to FIG.

<Seventh embodiment>
Further, as shown in FIG. 13, the number of the communication members 24 (24 A, 24 B, 24 C, 24 D), the number of the partition plates 26, the arrangement, and the connection location of the inlet pipe 18 are adjusted. By adjusting the number 38, the leeward module 2C and the central module 2B can be used as the first diversion module 30A and the second diversion module 30B, respectively. In this case, the one-pass pre-division module 28 is not formed, and the refrigerant flows in both the ascending path and the descending path from the first diversion module 30A toward the second diversion module 30B. Even in this case, the blown air temperature of the heat exchanger 1 can be made uniform at least as compared with the conventional case.

<Eighth Embodiment>
As shown in FIG. 14, the number of communication members (24A, 24B, 24C, 24D) and partition plates 26 is changed, and as a result, the number of flow dividing core portions 38 constituting the first and second

flow dividing modules

30A, 30B is changed to the first. It is possible to increase compared to the case of the seventh embodiment (FIG. 13).
Furthermore, the heat exchanger 1 of each of the above embodiments is formed by superimposing three heat exchange modules 2 in the ventilation direction X. However, if the heat exchanger 1 has at least one branching and merging

module

30, 32 each, A heat exchanger in which two exchange modules 2 are stacked may be used, or may be applied to a heat exchanger in which four or more heat exchange modules 2 are stacked.

In the heat exchanger 1 of each of the above embodiments, both the inlet pipe 18 and the outlet pipe 20 are connected to the upper header tank 4, but not limited to this, at least the inlet pipe 18 and the outlet pipe 20 are at least. Either one may be connected to the lower header tank 6. Even in this case, the blown air temperature of the heat exchanger 1 can be made uniform at least as compared with the conventional case.

Moreover, although the refrigerant | coolant used for the heat exchanger 1 of each said embodiment is a carbon dioxide refrigerant | coolant, you may use another refrigerant | coolant and the shape of the upper and

lower header tanks

4 and 6 is not limited to a round pipe shape. Of course.

1 Heat exchanger 2 Heat exchange module 4

Upper header tank

4A, 4B, 4C Upper header tank (front and rear header tanks)
4U Upper header tank assembly 6

Lower header tank

6A, 6B, 6C Lower header tank (front and rear header tanks)
6L Lower header tank assembly 8 Tube 12 Core 18 Inlet pipe 20 Outlet pipe 24 Communication member (communication part)
26 Partition plate 30 Split module 32 Merge module 38 Split core

Claims

A heat exchanger formed by stacking two or more heat exchange modules in which the refrigerant flows in the ventilation direction,
Each of the heat exchange modules includes a pair of upper and lower header tanks that are spaced apart from each other, and a plurality of tubes that extend in parallel between the upper and lower header tanks and that have both ends communicating with the inside of the upper and lower header tanks. With
The plurality of tubes form a core that performs heat exchange between the refrigerant and the ventilation,
Each of the heat exchange modules includes
Dividing the core into a plurality of paths, diverting the refrigerant in the header tank, and a diversion module having a diversion core portion through which the diverted refrigerant circulates;
A merging module for merging the refrigerant that has circulated through the diversion core part in the header tank and circulated through the core;
The said diversion module is a heat exchanger located in the lee of the said ventilation direction rather than the said confluence | merging module.
The heat exchanger according to claim 1, wherein the diversion core part is positioned at a position that is symmetrical with respect to a center in a longitudinal direction of the upper and lower header tanks.
The heat exchanger according to claim 1 or 2, wherein the merging module is formed by one pass that does not divide the core.
Each of the heat exchange modules is
The diversion and merging module;
The three or more heat exchange modules including a pre-division module in which the refrigerant before the diversion of the refrigerant flowing through the diversion module is positioned leeward in the ventilation direction than the diversion module,
The heat exchanger according to any one of claims 1 to 3, wherein the pre-division module is formed by one pass that does not divide the core.
Further comprising an inlet pipe and an outlet pipe for the refrigerant to the heat exchanger;
The heat exchanger according to any one of claims 1 to 4, wherein the inlet pipe and the outlet pipe are both connected to one of the upper and lower header tanks.
The heat exchanger according to any one of claims 1 to 5, wherein each of the heat exchange modules is stacked in an odd number in the ventilation direction.
The upper and lower header tanks form an upper header tank coupling body and a lower header tank coupling body by the header tanks before and after being arranged in the ventilation direction,
At least one of the upper and lower header tank connections communicates with the inside of the front and rear header tanks, and forms a refrigerant flow path between the heat exchange modules. At least one of the left and right sides of the communication part Partitioning the inside of the header tank at one side, and having a partition plate that divides the core into a plurality of parts and flows a refrigerant,
The heat exchanger according to any one of claims 1 to 6, wherein the branch flow and the merge module are formed by arranging the communication portion and the partition plate.
The diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank, and a descending path flowing from the upper header tank to the lower header tank,
The heat according to claim 7, wherein when the rising path communicates with the header tank of the merging module via the plurality of communication portions, the rising path in the diversion module has a larger number than the descending path. Exchanger.
The diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank, and a descending path flowing from the upper header tank to the lower header tank,
The heat according to claim 7, wherein when the descending path communicates with the header tank of the merging module via the plurality of communicating portions, the descending path in the diversion module has a larger number than the ascending path. Exchanger.
The diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank, and a descending path flowing from the upper header tank to the lower header tank,
The heat exchanger according to claim 7, wherein when the rising path communicates with the header tank of the merging module via one communication portion, the number of the rising paths in the diversion module is one.
The diversion core part in the diversion module is classified into an ascending path flowing from the lower header tank to the upper header tank, and a descending path flowing from the upper header tank to the lower header tank,
The heat exchanger according to claim 7, wherein when the descending path communicates with the header tank of the merging module via the one communication portion, the number of the descending paths in the diversion module is one.