JP6308115B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger.

  A heat exchanger that includes a tube and a header tank and is compatible with two heat exchange systems is known (see, for example, Patent Document 1 below). The heat exchanger described in Patent Document 1 below is provided with a tube group corresponding to the first heat exchange system and a tube group corresponding to the second heat exchange system, and the inside of the header tank so as to correspond to each. The space is partitioned by a partition wall.

JP 2012-215366 A

  In the above-described conventional technology, a space serving as the first tank chamber corresponding to the first heat exchange system and a space serving as the second tank chamber corresponding to the second heat exchange system are formed in the tank body constituting the header tank. In addition, a space serving as an intermediate chamber corresponding to a so-called dummy tube in which no fluid flows between them is formed. The plurality of tubes forming the first heat exchange system, the plurality of tubes forming the second heat exchange system, and the dummy tube are attached to the core plate. A packing is disposed between the core plate and the tank body, and a header tank is configured by compressing the packing by caulking the core plate and joining the core plate and the tank body.

By the way, the packing corresponds to the first tank chamber and is formed to surround the outer periphery (
Hereinafter, referred to as the first portion), a portion formed so as to surround the outer periphery of the second tank chamber (hereinafter referred to as the second portion), and a portion connecting these portions (hereinafter referred to as the connecting portion). And). In the above-described conventional technology, these portions are formed with the same thickness, and as a whole have a ladder shape (see FIG. 5 of Patent Document 1).

  In the above conventional technique, since the packing is integrally formed in a ladder shape, it is sufficient to provide a single positioning step when being arranged between the tank body and the core plate, and each part is separately molded. It is easier to assemble than if However, in addition to the first and second portions of the packing, the connecting portion has a structure in which a reaction force is applied when the core plate is crimped.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a heat exchanger in which a plurality of chambers are provided in a header tank, and to caulk a core plate without sacrificing ease of assembly. It aims at providing the heat exchanger which can reduce the force which is required.

  In order to solve the above problems, a heat exchanger according to the present invention includes a core portion (40) having a plurality of tubes (411, 421, 431) through which fluid flows, and both longitudinal ends of the plurality of tubes. And a pair of header tanks (10A, 10B) provided to communicate with the plurality of tubes. The header tank includes a core plate (30) to which the plurality of tubes are joined, a tank body (20Aa, 20Ba) that forms a tank internal space together with the core plate, and a space between the core plate and the tank body. And a seal member (50, 50D) which is disposed in the upper surface of the core plate and is held tightly by caulking the claws (311, 331) of the core plate. The tank body is provided with the first inner wall (212c) and the second inner wall (222c), so that the tank inner space includes the first tank inner space (21Aa, 21Ba) and the second tank inner space (22Aa). 22Ba) and a third tank inner space (23a) formed between the first tank inner space and the second tank inner space where no fluid flows. The seal member includes an outer wall (212a, 212b) of the tank body that defines the first tank inner space, a first seal portion (51) sandwiched between the first inner wall and the core plate, A second seal portion (52) sandwiched between the outer wall (222a, 222b) and the second inner wall of the tank body defining the second tank inner space and the core plate; and the first seal portion. And a connecting portion (53, 53D, 53M) connecting the second seal portion, and the compression rate of the connecting portion is based on the compression rate of the first seal portion and the compression rate of the second seal portion. Is also configured to be low.

  According to the present invention, since the compression rate of the first seal part and the compression rate of the second seal part are configured to be higher than the compression rate of the connection part, the space into which water enters when the core plate is caulked. The water tightness of the first tank inner space and the second tank inner space can be reliably ensured. The compression rate of the connecting portion is configured so that the compression rate of the first seal portion and the compression rate of the second seal portion are lower than the compression rate of the connecting portion, so that the compression rate of the connecting portion is low. The force can be reduced.

  According to the present invention, there is provided a heat exchanger in which a plurality of chambers are provided in a header tank, which can reduce the force required for caulking the core plate without sacrificing ease of assembly. can do.

It is a perspective view which shows the external appearance of the heat exchanger which concerns on embodiment of this invention. It is a disassembled perspective view which expands and shows a part of heat exchanger shown in FIG. It is a figure which expands and shows a part of heat exchanger shown in FIG. It is sectional drawing which shows the IV-IV cross section of FIG. It is sectional drawing which shows the VV cross section of FIG. It is sectional drawing which shows the VI-VI cross section of FIG. FIG. 7 is a first modification of the present embodiment, and is a cross-sectional view showing a cross section corresponding to the portion shown in FIG. It is a figure which shows the 2nd modification of this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  The configuration of the heat exchanger HE according to the present embodiment will be described with reference to FIGS. 1 and 2. The heat exchanger HE is used as a radiator of a hybrid vehicle. The heat exchanger HE functionally includes a first heat exchanger HE1 and a second heat exchanger HE2. The first heat exchanger HE1 is configured as a radiator for engine cooling water. The second heat exchanger HE2 is configured as a radiator for electric system cooling water.

  The heat exchanger HE includes a header tank 10 </ b> A, a header tank 10 </ b> B, and a heat exchange unit 40 in terms of component configuration. The header tank 10 </ b> A and the header tank 10 </ b> B are arranged so as to sandwich the heat exchange unit 40. Subsequently, the component configuration of the heat exchanger HE will be described.

  The header tank 10 </ b> A includes a header tank component 20 </ b> A and a core plate 30. The header tank component 20A is a box-shaped component that is open on one side. The header tank part 20A and the core plate 30 are joined by disposing the core plate 30 on the opened surface and bending the claws of the core plate 30 to cause plastic deformation.

  The header tank component 20A is, for example, a resin molded product formed by filling a mold with a resin containing fibers obtained by adding glass fibers as a reinforcing material to a polyamide resin. In order to ensure high thermal conductivity, the core plate 30 is preferably manufactured from aluminum having high thermal conductivity, for example.

  A plurality of first tubes 411, second tubes 421, and third tubes 431 are brazed and joined to the core plate 30 at their longitudinal ends. Further, between the first tube 411 and the first tube 411, between the second tube 421 and the second tube 421, between the third tube 431 and the third tube 431, between the first tube 411 and the third tube 431. The cooling fin 401 is provided between the second tube 421 and the third tube 431.

  The core plate 30 includes a first plate portion 31, a second plate portion 32, and a third plate portion 33. The third plate portion 33 is disposed between the first plate portion 31 and the second plate portion 32. The core plate 30 is a plate-like member in which a first plate portion 31, a second plate portion 32, and a third plate portion 33 are integrally formed, and includes a first tube 411, a second tube 421, and A predetermined opening is provided so that the third tube 431 can be fixed through. The first tube 411 is joined to the first plate portion 31. The second tube 421 is joined to the second plate portion 32. The third tube 431 is joined to the third plate portion 33.

  The 1st tube 411, the 2nd tube 421, the 3rd tube 431, and the cooling fin 401 comprise the heat exchange part 40 (core part). The first tube 411, the second tube 421, the third tube 431, and the cooling fin 401 are preferably manufactured from, for example, aluminum having high thermal conductivity in order to ensure high thermal conductivity.

  The heat exchange unit 40 includes a first heat exchange unit 41, a second heat exchange unit 42, and a thermal strain relaxation unit 43. The plurality of first tubes 411 and the cooling fins 401 arranged between the plurality of first tubes 411 constitute the first heat exchange unit 41. The plurality of second tubes 421 and the cooling fins 401 disposed between the plurality of second tubes 421 constitute a second heat exchange unit 42. The plurality of third tubes 431 and the cooling fins 401 arranged between the plurality of third tubes 431 constitute a thermal strain relaxation portion 43.

  The header tank component 20A includes a component main body 20Aa (tank main body) and a seal member 50. The component main body 20Aa includes a first partition portion 21A, a second partition portion 22A, and a third partition portion 23. The third partition 23 is disposed between the first partition 21A and the second partition 22A. The first partition portion 21A, the second partition portion 22A, and the third partition portion 23 are substantially box-shaped portions opened in the same direction.

  21 A of 1st division parts are obstruct | occluded by the 1st plate part 31, and the 1st tank space 21Aa which stores engine cooling water temporarily inside is formed. The first partition 21 </ b> A is provided with an inflow port 24 </ b> A near the end opposite to the third partition 23. The engine coolant flowing in from the inflow port 24A is temporarily stored in the first tank inner space 21Aa. The engine coolant temporarily stored in the first tank inner space 21Aa is divided into a plurality of first tubes 411 and flows out, and flows through the first tubes 411.

  22 A of 2nd division parts are obstruct | occluded by the 2nd plate part 32, and 2nd tank inner space 22Aa which stores an electrical system cooling water temporarily is formed in an inside. An inlet 25A is provided in the second partition 22A. The electric system coolant flowing in from the inflow port 25A is temporarily stored in the second tank space 22Aa. The electrical cooling water temporarily stored in the second tank internal space 22Aa is divided into a plurality of second tubes 421 and flows out, and flows through the second tubes 421.

  The third partition 23 is closed by the third plate portion 33, and a third tank space 23a in which no cooling water is stored is formed. The third tube 431 provided continuously with the third plate portion 33 functions as a dummy tube through which cooling water does not flow.

  As described above, cooling water having different temperatures flows through the first tube 411 in the first heat exchange unit 41 and the second tube 421 in the second heat exchange unit 42. Therefore, when the first tube 411 and the second tube 421 are provided adjacent to each other, the tube may be distorted due to a temperature difference. Therefore, as a measure against thermal distortion of the tube, the cooling water is not circulated through the third tube 431 but functions as the thermal strain relaxation unit 43.

  Next, the header tank 10B will be described. The header tank 10B includes a header tank component 20B and a core plate 30. As for the header tank component 20B, a portion different from the header tank component 20A will be described.

  The header tank component 20B includes a component main body 20Ba (tank main body) and a seal member 50. The component main body 20Ba includes a first partition portion 21B, a second partition portion 22B, and a third partition portion 23. The 3rd division part 23 is arrange | positioned between the 1st division part 21B and the 2nd division part 22B. The first partition part 21B, the second partition part 22B, and the third partition part 23 are substantially box-shaped parts opened in the same direction.

  The first partition portion 21B is closed by the first plate portion 31, and a first tank inner space 21Ba for temporarily storing engine cooling water is formed therein. The first partition portion 21B is provided with an outlet 24B in the vicinity of the end portion on the third partition portion 23 side. Engine cooling water flows from the plurality of first tubes 411 into the first tank inner space 21Ba. The engine coolant that has flowed from the plurality of first tubes 411 is temporarily stored in the first tank inner space 21Ba. The engine cooling water temporarily stored in the first tank inner space 21Ba flows out from the outlet 24B. The engine coolant that has flowed out of the outlet 24B circulates and cools the engine (not shown) and returns to the inlet 24A.

  The second partition portion 22B is closed by the second plate portion 32, and a second tank inner space 22Ba for temporarily storing electric cooling water is formed therein. The second partition 22B is provided with an outlet 25B. Electric system cooling water flows from the plurality of second tubes 421 into the second tank inner space 22Ba. The electric system coolant flowing in from the plurality of second tubes 421 is temporarily stored in the second tank internal space 22Ba. The electrical cooling water temporarily stored in the second tank inner space 22Ba flows out from the outlet 25B. The electrical cooling water flowing out from the outlet 25B circulates and cools an electrical system such as an electric motor or an inverter, and returns to the inlet 25A.

  As described above, the first partition part 21A, the first plate part 31 covering the part, the first heat exchange part including the first tube 411 and the cooling fin 401, the first partition part 21B, and the first part covering the part. The 1 plate part 31 comprises 1st heat exchanger HE1. Also, the second partition part 22A, the second plate part 32 covering the part, the second heat exchange part including the second tube 421 and the cooling fin 401, the second partition part 22B, and the second plate part covering the part 32 comprises 2nd heat exchanger HE2.

  Next, the mutual relationship between the component main body 20Ba, the core plate 30, and the seal member 50 will be described. In the following description, the header tank 10B side will be described as an example, but the same mutual relationship is configured on the header tank 10A side. FIG. 2 shows the component main body 20Ba and the seal member 50 separately for convenience of explanation, but actually the seal member 50 is integrally formed with the component main body 20Ba to constitute the header tank component 20B. doing.

  The first partition portion 21B has side walls 212a and 212b (outer walls) in the longitudinal direction and side walls 212c (first inner walls) in the short direction. The side wall 212a and the side wall 212b are disposed to face each other. The side wall 212a and the side wall 212b are connected to each other while curving each other at the bottom portion opposite to the opening side to which the seal member 50 is bonded. The side wall 212c is arranged opposite to the other side wall (not shown in FIG. 2) in the lateral direction. The longitudinal side walls 212a and 212b, the short side wall 212c, and a side wall (not shown) form a peripheral wall surface and a bottom surface of the recess that constitutes the first tank inner space 21Ba.

  The second partition portion 22B has side walls 222a and 222b (outer walls) in the longitudinal direction and side walls 222c (second inner walls) in the short direction. The side wall 222a and the side wall 222b are disposed to face each other. The side wall 222a and the side wall 222b are connected to each other while curving each other at the bottom portion opposite to the opening side to which the seal member 50 is bonded. The side wall 222c is disposed to face the other side wall (not shown in FIG. 2) in the lateral direction. The longitudinal side walls 222a and 222b, the short side wall 222c, and a side wall (not shown) form a peripheral wall surface and a bottom surface of the recess that constitutes the second tank internal space 22Ba.

  The third partition 23 has side walls 231a, 231b, 212c, and 222c. The side wall 231a and the side wall 231b are disposed to face each other. The side wall 231a is disposed so as to linearly connect the side wall 212a and the side wall 222a. The side wall 231b is disposed so as to linearly connect the side wall 212b and the side wall 222b. The side wall 222c is a wall that shares the upper part with the second partition part 22B, and is a wall that partitions the second partition part 22B and the third partition part 23. The side wall 212c is a wall that shares the upper part with the first partition part 21B, and is a wall that partitions the first partition part 21B and the third partition part 23.

  The third partition 23 has a bottom wall 233. The bottom wall 233 is disposed at a predetermined distance from the upper ends of the side walls 231a, 231b, 212c, and 222c. This predetermined distance is a distance set to such an extent that it does not interfere with the third tube 431 entering the third partition part 23.

  The seal member 50 includes a first seal portion 51, a second seal portion 52, and a connecting portion 53. The first seal portion 51 includes seal portions 512a, 512b, and 512c that are tightly bonded to the upper ends of the side walls 212a, 212b, and 212c that constitute the first partition portion 21B. The second seal portion 52 has seal portions 522a, 522b, and 522c that are tightly joined to the upper ends of the side walls 222a, 222b, and 222c that constitute the second partition portion 22B.

  The connecting portion 53 includes seal portions 531a and 531b that are in close contact with the upper ends of the side walls 231a and 231b constituting the third partition portion 23.

  The seal member 50 is intimately joined to the upper end surface of each side wall of the component main body 20Ba, so that the seal member 50 is interposed between the component main body 20Ba and the core plate 30, and the first tank internal space 21Ba, the second tank internal space 22Ba, A three-tank space 23a is formed.

  3A is a side view in which the vicinity of the third partition 23 of the header tank 10B is enlarged, and FIG. 3B is a plan view in which the vicinity of the third partition 23 of the header tank 10B is enlarged. is there. As shown in FIG. 3, the thickness of the connecting portion 53 is configured to be thinner than the thickness of the first seal portion 51 and the thickness of the second seal portion 52.

  As shown in FIG. 4, the first seal portion 51 is sandwiched between the first plate portion 31 of the core plate 30 and the first partition portion 21 </ b> B, and the claw 311 provided on the first plate portion 31 has a claw 311. It is compressed by caulking. As shown in FIG. 5, the seal portion 512c is sandwiched between the first plate portion 31 of the core plate 30 and the first partition portion 21B, and the claws 311 provided on the first plate portion 31 are caulked. It is compressed by that.

  On the other hand, as shown in FIG. 6, the connecting portion 53 is sandwiched between the third plate portion 33 of the core plate 30 and the third partition portion 23, and the claws 331 provided on the third plate portion 33 are Although it is caulked, a gap g is formed.

  With this configuration, the first seal portion 51 and the second seal portion 52 of the seal member 50 are sandwiched and compressed between the core plate 30 and the component main body 20Ba, so that the first tank inner space 21Ba. And it is comprised so that water may not leak from 2nd tank inner space 22Ba. In addition, since the gap g is formed, if water leaks from the first tank inner space 21Ba and the second tank inner space 22Ba, water flows out from the gap g. There is no need to provide.

  Since the third tank space 23a is a space that does not allow water to enter, there is no problem in terms of the function of the heat exchanger even when the connecting portion 53 is not compressed. The gist of the present embodiment is to secure the necessary water tightness while reducing the caulking force by lowering the compression rate of the connecting portion 53 than the compression rates of the first seal portion 51 and the second seal portion 52. Therefore, the present invention is not limited to the mode in which the gap g is formed. For example, as shown in FIG. 7, although the gap g is not formed, the connecting portion 53M that contacts the third plate portion 33 is formed so as to be lower than the compression ratio of the first seal portion 51 and the second seal portion 52. It is also a preferred embodiment.

  In the embodiment described above, the seal member 50 is formed integrally with the component main body 20Ba, and the cross-sectional shape thereof is a convex shape that tapers off as the distance from the component main body 20Ba increases. This is intended to ensure that when the seal member 50 is compressed, a load is reliably applied to the convex tip, and the seal member is compressed and adhered. Therefore, the convex shape only needs to be formed at least in the first seal portion 51 and the second seal portion 52, and the connecting portion 53 does not necessarily have a convex shape. Therefore, as shown in FIG. 8, in the case of a seal member 50D in which the seal member 50 is formed separately, the connecting portion 53D only needs to connect the first seal portion 51 and the second seal portion 52 and is illustrated. It is also preferable to adopt such a flat plate form.

  In the above-described embodiment and its modifications, both focus on reducing the thickness of the connecting portions 53 and 53D in the seal member 50 as compared with others, but from the viewpoint of reducing the compression rate of the connecting portions, Narrowing the width of the connecting portion is also a preferred mode.

10A, 10B: Header tanks 20Aa, 20Ba: Parts main body (tank main body)
21Aa, 21Ba: first tank space 22Aa, 22Ba: second tank space 23a: third tank space 30: core plate 40: heat exchange part (core part)
50, 50D: Seal member 51: First seal part 52: Second seal part 53, 53D, 53M: Connection part 212a, 212b: Side wall (outer wall)
212c: Side wall (first inner wall)
222a, 222b: Side walls (outer walls)
222c: Side wall (second inner wall)
311, 331: claw 411: first tube 421: second tube 431: third tube

Claims (4)

A heat exchanger,
A core (40) having a plurality of tubes (411, 421, 431) through which fluid flows;
A pair of header tanks (10A, 10B) provided to communicate with the plurality of tubes on both ends in the longitudinal direction of the plurality of tubes,
The header tank includes a core plate (30) to which the plurality of tubes are joined, a tank body (20Aa, 20Ba) that forms a tank internal space together with the core plate, and a space between the core plate and the tank body. And a seal member (50, 50D) that is arranged and held in contact by caulking the claws (311, 331) of the core plate,
The tank body is provided with the first inner wall (212c) and the second inner wall (222c), so that the tank inner space includes the first tank inner space (21Aa, 21Ba) and the second tank inner space (22Aa). 22Ba) and a third tank inner space (23a) that is formed between the first tank inner space and the second tank inner space and does not flow a fluid,
The sealing member is
A first seal portion (51) sandwiched between the outer wall (212a, 212b) and the first inner wall of the tank body defining the first tank inner space and the core plate;
A second seal portion (52) sandwiched between the outer wall (222a, 222b) and the second inner wall of the tank body defining the second tank inner space, and the core plate;
A connecting portion (53, 53D, 53M) for connecting the first seal portion and the second seal portion;
The heat exchanger is configured such that a compression rate of the connecting portion is lower than a compression rate of the first seal portion and a compression rate of the second seal portion.   In the direction in which the claws of the core plate are caulked, the thickness of the connecting portion (53, 53D) is configured to be thinner than the thickness of the first seal portion and the thickness of the second seal portion. The heat exchanger according to claim 1.   The heat exchanger according to claim 2, wherein a gap is formed between the core plate and the connecting portion.   The said sealing member (50) is integrally shape | molded with the said tank main body, The cross-sectional shape is formed in the convex shape which tapes off as it leaves | separates from the said tank main body, The Claim 1 characterized by the above-mentioned. Heat exchanger.

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