WO2014041772A1

WO2014041772A1 - Heat exchanger

Info

Publication number: WO2014041772A1
Application number: PCT/JP2013/005280
Authority: WO
Inventors: 長屋　誠一; 健吾文; 直久石坂; 一雄亀井; 則昌馬場; 章太茶谷
Original assignee: 株式会社デンソー
Priority date: 2012-09-13
Filing date: 2013-09-05
Publication date: 2014-03-20
Also published as: JP2014055737A

Abstract

A heat exchanger is provided with at least two heat exchange units (48, 49) that are disposed in series with respect to the flow direction of an external fluid. The at least two heat exchange units (48, 49) each have core parts (480, 490) and tank parts (41, 43). A communication part (70) causes a heat medium to flow from the one tank part (41), of the tank parts (41, 43) that are adjacent to each other in the flow direction of the external fluid, into the other tank part (43). In the other tank part (43), an overlapping part (600), which is a portion overlapping the communication part (70) when seen from the flow direction of the external fluid, has rigidity increasing parts (80-82, 6d) for making the rigidity of the overlapping part (600) higher than the rigidity of other portions of the other tank part (43).

Description

Heat exchanger

Cross-reference of related applications

This disclosure is based on Japanese Patent Application No. 2012-201446 filed on September 13, 2012, the contents of which are incorporated herein by reference.

This disclosure relates to a heat exchanger that performs heat exchange between an external fluid flowing outside and a heat medium.

Conventionally, a first heat exchanger and a second heat exchanger including a core portion formed by stacking a plurality of tubes and a pair of tank portions connected to both ends of the plurality of tubes are arranged in series in the air flow direction. The structure which connects one tank part in each heat exchange part via a pair of communicating part is known (for example, refer patent document 1).

JP 2001-108392 A

By the way, in the heat exchanger described in Patent Document 1, since the flow passage cross-sectional area of the communication portion is smaller than the flow passage cross-sectional area of the tank portion, the flow velocity of the refrigerant passing through the communication portion is the flow velocity of the refrigerant flowing through the tank portion. Will be faster. Therefore, the impact sound when the refrigerant that has passed through the communication portion collides with the side surface of the tank portion increases, and the refrigerant passage sound in the heat exchanger increases.

This indication aims at providing the heat exchanger which can reduce the passage sound of the heat carrier which distribute | circulates an inside in view of the said point.

In order to achieve the above object, the heat exchanger includes at least two heat exchange units arranged in series with respect to the flow direction of the external fluid, and each of the at least two heat exchange units includes a plurality of heat medium flows. A core portion formed by stacking tubes, a tank portion that is connected to at least one end of the plurality of tubes and collects or distributes the heat medium flowing through the plurality of tubes; A communication portion for allowing a heat medium to flow from one tank portion to the other tank portion among the tank portions adjacent to each other in the fluid flow direction, and when viewed from the flow direction of the external fluid in the other tank portion, The superposition | polymerization part which is a superposition | polymerization part has a rigidity increase part for making the rigidity of the said superposition | polymerization part higher than the rigidity of the other part of the other tank part.

According to this, the rigidity of the overlapping portion can be increased by providing the rigidity increasing portion in the overlapping portion of the other tank portion. And since the superposition | polymerization part of the other tank part is a site | part which the heat medium which passed the communication part collides, the heat medium which passed the communication part collided with the superposition | polymerization part by making the rigidity of the said superposition | polymerization part high. It is possible to reduce the level of the heat medium collision sound and shift the frequency of the heat medium collision sound to a higher frequency. Thereby, since the heat medium impact noise can be reduced, it is possible to reduce the heat medium passing sound in the heat exchanger.

It is a block diagram of the refrigerating cycle apparatus which comprises the vehicle air conditioner in 1st Embodiment. It is a perspective view which shows the evaporator which concerns on 1st Embodiment. It is a disassembled perspective view which shows the communicating part vicinity of the evaporator which concerns on 1st Embodiment. It is a perspective view which shows the evaporator which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the communicating part vicinity of the evaporator which concerns on 3rd Embodiment. It is a disassembled perspective view which shows the communicating part vicinity of the evaporator which concerns on 4th Embodiment. It is a disassembled perspective view which shows the communication part vicinity of the evaporator which concerns on other embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
A first embodiment of the present disclosure will be described with reference to FIGS. In this embodiment, the heat exchanger of this indication is applied to the evaporator 40 in the refrigerating cycle apparatus 1 which comprises a vehicle air conditioner. In FIG. 3, for clarity of illustration, illustration of a portion constituting the first tank portion 41 in the tank forming member 6b described later is omitted. The same applies to the following drawings.

FIG. 1 shows the configuration of the refrigeration cycle apparatus that constitutes the vehicle air conditioner according to the first embodiment of the present disclosure. The refrigeration cycle apparatus 1 constituting this air conditioner includes a compressor 10, a radiator 20, a decompressor 30, and an evaporator 40. These components are connected in an annular shape by piping and constitute a refrigerant circulation path.

The compressor 10 is driven by an internal combustion engine (or an electric motor or the like) that is a power source 2 for traveling the vehicle. When the power source 2 stops, the compressor 10 also stops. The compressor 10 sucks the refrigerant from the evaporator 40, compresses it, and discharges it to the radiator 20. The radiator 20 cools the high-temperature refrigerant. The radiator 20 is also called a condenser. The decompressor 30 decompresses the refrigerant cooled by the radiator 20.

The evaporator 40 performs heat exchange between the blown air blown by a blower (not shown) and the refrigerant decompressed by the decompressor 30, evaporates the refrigerant, and sends the blown air blown into the vehicle interior. Cooling. Therefore, the blown air in the present embodiment corresponds to “external fluid”, and the refrigerant in the present embodiment corresponds to “heat medium”.

2 and 3, the evaporator 40 has a first heat exchange section 48 and a second heat exchange section 49 arranged in two layers. And the 2nd heat exchange part 49 is arrange | positioned at the blowing air flow upstream, and the 1st heat exchange part 48 is arrange | positioned at the blowing air flow downstream.

Specifically, the evaporator 40 has a refrigerant passage member branched into a plurality. The refrigerant passage member is provided by a metal passage member such as aluminum. The refrigerant passage member is provided by first to fourth tank portions 41 to 44 positioned in a set, and tubes 45 as a plurality of refrigerant tubes connecting the tank portions 41 to 44. The first and second

heat exchange parts

48 and 49 have core parts 480 and 490 formed by stacking tubes 45, respectively.

The first tank part 41 and the second tank part 42 form a pair and are arranged in parallel with a predetermined distance from each other. The third tank portion 43 and the fourth tank portion 44 also form a set, and are arranged in parallel at a predetermined distance from each other. A plurality of tubes 45 are arranged at equal intervals between the first tank portion 41 and the second tank portion 42. Each tube 45 communicates with the

corresponding tank portion

41, 42 at its end. A first heat exchanging portion 48 is formed by the first tank portion 41, the second tank portion 42, and a plurality of tubes 45 arranged therebetween.

A plurality of tubes 45 are arranged at equal intervals between the third tank portion 43 and the fourth tank portion 44. Each tube 45 communicates with the

corresponding tank portion

43, 44 at its end. A second heat exchanging portion 49 is formed by the third tank portion 43, the fourth tank portion 44, and the plurality of tubes 45 arranged therebetween.

A joint 50 in which a refrigerant inlet 50a is formed is provided at one end of the first tank portion 41 in the stacking direction of the tubes 45. The inside of the first tank portion 41 is partitioned into a first partition and a second partition by a partition plate 51 provided substantially at the center in the stacking direction of the tubes 45. Correspondingly, the plurality of tubes 45 are divided into a first group and a second group.

The refrigerant is supplied to the first section of the first tank unit 41. The refrigerant is distributed from the first section to the plurality of tubes 45 belonging to the first group. The refrigerant flows into the second tank portion 42 through the first group and is collected. The refrigerant is distributed again from the second tank portion 42 to the plurality of tubes 45 belonging to the second group. The refrigerant flows into the second section of the first tank portion 41 through the second group. Thus, in the 1st heat exchange part 48, the flow path which flows a refrigerant | coolant in a U shape is formed.

The refrigerant outlet 50b of the joint 50 is connected to one end of the third tank portion 43 in the stacking direction of the tubes 45. The inside of the third tank portion 43 is partitioned into a first partition and a second partition by a partition plate 52 provided at substantially the center in the stacking direction of the tubes 45. Correspondingly, the plurality of tubes 45 are divided into a first group and a second group. The first section of the third tank portion 43 is adjacent to the second section of the first tank portion 41. The first compartment of the third tank portion 43 and the second compartment of the first tank portion 41 are communicated via the communication portion 70. The detailed configuration of the communication unit 70 will be described later.

The refrigerant flows from the second section of the first tank section 41 into the first section of the third tank section 43 via the communication section 70. The refrigerant is distributed from the first section to the plurality of tubes 45 belonging to the first group. The refrigerant flows into the fourth tank portion 44 through the first group and is collected. The refrigerant is distributed again from the fourth tank portion 44 to the plurality of tubes 45 belonging to the second group. The refrigerant flows into the second section of the third tank portion 43 through the second group. Thus, also in the 2nd heat exchange part 49, the flow path which flows a refrigerant | coolant in a U shape is formed. The refrigerant in the second section of the third tank portion 43 flows out from the refrigerant outlet and flows toward the compressor 10.

In FIG. 2, the plurality of tubes 45 are arranged at substantially constant intervals. A plurality of gaps are formed between the plurality of tubes 45. A plurality of fins 46 for increasing the contact area with the air supplied to the passenger compartment are disposed in the plurality of gaps.

The tube 45 is a multi-hole tube formed in a flat shape and having a plurality of refrigerant passages therein. The tube 45 can be obtained by, for example, an extrusion method. The plurality of refrigerant passages extend along the longitudinal direction of the tube 45 and open at both ends of the tube 45. The plurality of tubes 45 are arranged in a row. In each row, the plurality of tubes 45 are arranged such that their main surfaces (flat surfaces) face each other.

The fins 46 are joined to two adjacent tubes 45 by a brazing material. The fin 46 is formed by bending a metal plate such as thin aluminum into a wave shape, and includes an armor window-like louver (not shown).

In the present embodiment, the first tank portion 41 and the third tank portion 43 are integrally formed, and the second tank portion 42 and the fourth tank portion 44 are integrally formed. Hereinafter, the unit in which the first tank unit 41 and the third tank unit 43 are integrated is referred to as a first header tank 61, and the unit in which the second tank unit 43 and the fourth tank unit 44 are integrated is a second one. It is called a header tank 62.

As shown in FIG. 3, each of the

header tanks

61 and 62 has a header plate 6a and a tank forming member 6b to which both tubes 45 arranged in two rows in the flow direction of the blown air are fixed. The tank forming member 6b is fixed to the header plate 6a, thereby forming a space in which the refrigerant flows. Specifically, the tank forming member 6b is formed in a double mountain shape (W shape) when viewed from the longitudinal direction by pressing a flat metal.

The first tank portion 41 and the third tank portion 43 are partitioned by joining the two mountain-shaped central portions of the tank forming member 6b of the first header tank 61 to the header plate 6a. Also, the second tank portion 42 and the fourth tank portion 44 are partitioned by joining the two mountain-shaped central portions of the tank forming member 6b of the second header tank 62 to the header plate 6a (see FIG. 2). ). Moreover, the communication part 70 is comprised by forming the some clearance gap 6c between the center part of the double mountain shape of the tank formation member 6b, and the header plate 6a.

The tank forming member 6 b has reinforcing ribs 6 d that protrude toward the outside of the

header tanks

61 and 62 in order to increase the strength of the

header tanks

61 and 62. The reinforcing rib 6d is formed so as to extend along the direction of air flow. A plurality of reinforcing ribs 6d are provided side by side in the longitudinal direction of the header tanks 61 and 62 (the stacking direction of the tubes 45).

Near the communicating portion 70 of the tank forming member 6b of the first header tank 61, that is, the portion that overlaps with the communicating portion 70 when viewed from the direction of the blown air in the tank forming member 6b of the first header tank 61 (hereinafter referred to as polymerization). The portion 600) is provided with a plurality of dimples 81 as projections protruding inward of the header tank 61. The plurality of dimples 81 are disposed between adjacent reinforcing ribs 6 d in the tank forming member 6 b of the first header tank 61.

According to this embodiment, by providing the plurality of dimples 81 in the overlapping portion 600 of the first header tank 61, the rigidity of the overlapping portion 600 can be increased. Therefore, the dimple 81 in the present embodiment constitutes a “rigidity increasing portion”.

And since the superposition | polymerization part 600 of the part which forms the 3rd tank part 43 in the 1st header tank 61 is a site | part which the refrigerant | coolant which passed the communication part 70 collides, by making the rigidity of the said superposition | polymerization part 600 high, While reducing the level of the refrigerant | coolant collision sound at the time of the refrigerant | coolant which passed the communication part 70 colliding with the superposition | polymerization part 600, the frequency of a refrigerant | coolant collision sound can be shifted to a higher frequency. Thereby, since a refrigerant | coolant collision noise can be aimed at, the refrigerant | coolant passage sound of the evaporator 40 can be reduced.

Furthermore, in this embodiment, the dimple 81 is formed by projecting a part of the tank forming member 6b to the inside of the header tank 61. That is, it can be said that the dimple 81 is a high-rigidity part whose rigidity is made higher than that of other parts by deforming the shape of the tank forming member 6b itself in the overlapping part 600. That is, the dimple 81 in the present embodiment constitutes a “high rigidity portion”.

Therefore, according to the present embodiment, since it is not necessary to provide a separate member from the tank forming member 6b in order to increase the rigidity of the overlapping portion 600, an increase in the number of parts can be prevented. Further, since it is not necessary to increase the plate thickness of the tank forming member 6b in order to increase the rigidity of the overlapping portion 600, it is possible to prevent an increase in material cost.

The dimple 81 may be formed so as to protrude to the outside of the header tank 61, but it is desirable to form the dimple 81 so as to protrude to the inside of the header tank 61 as in the present embodiment.

(Second Embodiment)
Next, a second embodiment of the present disclosure will be described based on FIG. The second embodiment is different from the first embodiment in the arrangement of the reinforcing ribs 6d.

As shown in FIG. 4, in the overlapping portion 600 in the tank forming member 6 b of the first header tank 61, the interval between the adjacent reinforcing ribs 6 d is compared with other portions in the tank forming member 6 b of the first header tank 61. Is shorter.

According to this, the rigidity of the overlapping portion 600 can be increased. Therefore, the reinforcing rib 6d provided in the overlapping portion 600 in the present embodiment and having a short distance between adjacent portions constitutes a “rigidity increasing portion”.

Further, the reinforcing rib 6d is formed by projecting a part of the tank forming member 6b to the outside of the header tank 61. In other words, the reinforcing rib 6d formed in the overlapping portion 600 and having a short distance between adjacent portions is a high-rigidity portion whose rigidity is higher than that of other portions by deforming the shape of the tank forming member 6b itself in the overlapping portion 600. It can be said. That is, the reinforcing rib 6d formed in the overlapping portion 600 in the present embodiment and having a short distance between adjacent portions constitutes a “highly rigid portion”. Therefore, according to the present embodiment, it is possible to obtain the same effect as that of the first embodiment.

(Third embodiment)
Next, a third embodiment of the present disclosure will be described based on FIG. The third embodiment is different from the first embodiment in that ribs are provided.

As shown in FIG. 5, the overlapping portion 600 of the tank forming member 6 b of the first header tank 61 is provided with a rib 80 as a protruding portion that protrudes to the inside of the header tank 61. The rib 80 of the present embodiment is formed so as to extend in the stacking direction of the tubes 45. The rib 80 is a substantially central portion of the first header tank 61 that forms the first tank portion 41 in the blowing air flow direction and a portion of the first header tank 61 that forms the third tank portion 43. Each is formed at a substantially central portion in the air flow direction.

According to the present embodiment, the rigidity of the overlapping portion 600 can be increased by providing the overlapping portion 600 of the first header tank 61 with the rib 80 extending in the longitudinal direction of the first header tank 61. Therefore, the rib 80 in the present embodiment constitutes a “rigidity increasing portion”.

Further, in the present embodiment, the rib 80 is formed by bending a part of the tank forming member 6 b so as to protrude to the inside of the header tank 61. That is, it can be said that the rib 80 is a high-rigidity part whose rigidity is made higher than that of other parts by deforming the shape of the tank forming member 6b itself in the overlapping part 600. That is, the rib 80 in the present embodiment constitutes a “high rigidity portion”. Therefore, according to the present embodiment, it is possible to obtain the same effect as that of the first embodiment.

(Fourth embodiment)
Next, a fourth embodiment of the present disclosure will be described based on FIG. The fourth embodiment is different from the first embodiment in that a reinforcing plate is provided in the first header tank.

As shown in FIG. 6, a reinforcing plate 82 as a reinforcing member for increasing the strength of the first header tank 61 is provided on the outer surface of the overlapping portion 600 in the tank forming member 6 b of the first header tank 61. . The reinforcing plate 82 is formed so as to cover the top 61b of the tank forming member 6b (the part farthest from the tube 45).

More specifically, the reinforcing plate member 82 has an arcuate cross section viewed from the longitudinal direction of the first header tank 61, and is formed along the outer surface of the tank forming member 6b. The reinforcing plate 82 is joined in surface contact with the outer surface of the tank forming member 6b.

According to this, the rigidity of the overlapping portion 600 can be increased. Therefore, the reinforcing plate 82 in the present embodiment constitutes a “rigidity increasing portion”. Therefore, according to the present embodiment, it is possible to obtain the same effect as that of the first embodiment.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be variously modified as follows without departing from the spirit of the present disclosure. Further, the means disclosed in each of the above embodiments may be appropriately combined within a practicable range.

In the above embodiment, the example in which the rib 80, the dimple 81, the reinforcing plate 82, and the like are employed as the rigidity increasing portion has been described, but the rigidity increasing portion is not limited thereto. For example, as the rigidity increasing portion, a configuration is adopted in which the overlapping portion 600 of the first header tank 61 is made thicker at least one of the header plate 6a and the tank forming member 6b than other portions of the first header tank 61. May be.

In the embodiment described above, the overlapping portions 600 of the portion forming the first tank portion 41 and the portion forming the third tank portion 43 in the tank forming member 6b of the first header tank 61 have the rib 80, the dimple 81, and the like. Although the example which provided the rigidity increase part was demonstrated, not only this but a rigidity increase part may be provided only in the site | part which comprises the 3rd tank part 43 in the tank formation member 6b of the 1st header tank 61.

In the third embodiment, the example in which the rib 80 is formed so as to extend in the stacking direction of the tubes 45 has been described. However, the present invention is not limited thereto, and the rib 80 is formed so as to extend in a direction inclined with respect to the flow direction of the blowing air. May be.

In the fourth embodiment, the example in which the reinforcing plate 82 is formed so as to cover the top portion 61b of the tank forming member 6b has been described, but the arrangement of the reinforcing plate 82 is not limited to this. For example, as shown in FIG. 7, the reinforcing plate member 82 is made of two

side surface portions

62b and 63b (the portion closest to the header plate 6a than the top portion 61b and not joined to the header plate 6a). ) May be arranged so as to cover the side surface portion 63b side not facing the first tank portion 41.

In the above-described embodiment, the example in which the reinforcing rib 6d is formed in a straight line extending in the blowing air flow direction has been described, but the shape of the reinforcing rib 6d is not limited thereto. For example, the reinforcing rib 6d may be formed so as to extend in a direction inclined with respect to the stacking direction of the tubes 45, or may be formed in a circular shape or a polygonal shape.

In the above embodiment, the first tank portion 41 and the third tank portion 43 are integrally formed, and the second tank portion 42 and the fourth tank portion 44 are integrally formed. However, the present invention is not limited thereto. Instead, the first to fourth tank portions 41 to 44 may be configured as separate bodies.

In the above embodiment, the example in which the tank portions 41 to 44 are provided at both ends in the longitudinal direction of the tube 45 has been described. However, the present invention is not limited to this, and the refrigerant flow makes a U-turn at one end in the longitudinal direction of the tube 45. A tube may be adopted and a tank part may be provided only at the other end in the longitudinal direction of the tube.

In the above embodiment, the example in which the heat exchanger of the present disclosure is applied to the evaporator 40 has been described. However, the present disclosure can be applied to other heat exchangers such as a radiator and a refrigerant radiator (refrigerant condenser). is there.

Claims

A heat exchanger that exchanges heat between an external fluid flowing outside and a heat medium,
Comprising at least two heat exchange parts (48, 49) arranged in series with respect to the flow direction of the external fluid,
Each of the at least two heat exchange parts (48, 49)
A core portion (480, 490) configured by laminating a plurality of tubes (45) through which the heat medium flows;
A tank section (41 to 44) connected to at least one end of the plurality of tubes (45) and collecting or distributing the heat medium flowing through the plurality of tubes (45);
Furthermore, a communication part (70) for allowing the heat medium to flow from one tank part (41) to the other tank part (43) among the tank parts (41, 43) adjacent in the flow direction of the external fluid. With
In the other tank part (43), the overlapping part (600), which is a part overlapping with the communicating part (70) when viewed from the flow direction of the external fluid, has a rigidity of the overlapping part (600). A heat exchanger having a rigidity increasing portion (80 to 82, 6d) for making it higher than the rigidity of other portions of the other tank portion (43).
The rigidity increasing part is a high rigidity part (80, 81, 6d) whose rigidity is higher than that of the other part by changing the shape of the other tank part (43) itself in the overlapping part (600). The heat exchanger according to claim 1.
The high-rigidity portion is a protrusion (80, 81) provided in the overlapping portion (600) of the other tank portion (43) and protruding inward or outward of the other tank portion (43). The heat exchanger according to claim 2.
The heat exchanger according to claim 3, wherein the protrusion is a rib (80) extending in a direction intersecting with a flow direction of the external fluid.
A plurality of reinforcing ribs (6d) projecting inward or outward of the other tank portion (43) are arranged in the other tank portion (43) in the longitudinal direction of the other tank portion (43). Provided,
The high-rigidity portion is configured by making the interval between the adjacent reinforcing ribs (6d) in the overlapping portion (600) shorter than the interval between the adjacent reinforcing ribs (6d) in the other portion. The heat exchanger according to claim 2.
The heat exchanger according to claim 5, wherein the reinforcing rib (6d) extends in a direction intersecting the stacking direction of the tubes (45).
The rigidity increasing portion is a reinforcing member (82) for increasing the strength of the other tank portion (43) provided in the overlapping portion (600) of the other tank portion (43). The heat exchanger according to 1.