JP2018151075A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which inhibits corrosion of a core plate by liquid existing at an exterior part and having corrosiveness to inhibit fluid leakage in a header tank.SOLUTION: A first seal part 231 of a seal member 23 is sandwiched in an elastically deformed state between a bottom wall part 212a of a housing groove part 212 of a core plate 21 and a bottom surface 221a of a flange part 221 of a tank body part 22. Further, a second seal part 232 of the seal member 23 is sandwiched in an elastically deformed state between an outer wall part 212b of the housing groove part 212 of the core plate 21 and a side surface 221c of the flange part 221 of the tank body 22. A structure can inhibit liquid having corrosiveness from entering to a bottom wall part 212a side of the housing groove part 212 from a gap between the outer wall part 212b of the housing groove part 212 and the side surface 221c of the flange part 221.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a heat exchanger, and is suitable for a radiator that cools cooling water of a water-cooled internal combustion engine.

  Conventionally, a heat exchanger includes a core portion configured by alternately laminating a plurality of tubes and a plurality of corrugated fins, a header tank that is joined to an end portion in a longitudinal direction of the tube, and communicates with the tube. . The header tank includes a core plate into which tubes are inserted and joined, and a tank main body portion that is fixed to the core plate and forms an internal space of the header tank together with the core plate. The core plate has a flat surface on the inner side of the header tank, a tube joint portion provided with a tube insertion hole into which a plurality of tubes are inserted, and a groove portion provided outside the tube joint portion to receive the end of the tank main body portion. Is provided.

  In this type of heat exchanger, a configuration is known in which a seal member (gasket) is disposed in the groove portion of the core plate, and the seal member is sandwiched between the bottom portion of the groove portion and the end portion of the tank body portion (for example, Patent Document 1). Thereby, the sealing property in the header tank is ensured.

US Pat. No. 5,997,546

  By the way, the present inventors have investigated and investigated the presence or absence of fluid leakage in the header tank in the heat exchanger in which the seal member is held between the bottom of the groove of the core plate and the end of the tank body. As a result, a slight spillage of fluid may occur in the header tank.

  On the other hand, when the present inventors investigated the heat exchanger in which the bleeding leak occurred, in the corresponding heat exchanger, the bottom portion of the groove portion of the core plate was corroded. And it became clear that the fluid inside the header tank leaked by forming a minute gap between the bottom of the groove of the core plate and the seal member due to this corrosion.

  Therefore, the present inventors have studied in detail the corrosion factors at the bottom of the groove portion of the core plate in order to solve the problem of fluid leakage in the header tank. As a result, the corrosive liquid existing outside the heat exchanger enters and stays in the bottom of the core plate groove from the gap formed between the core plate groove and the end of the header tank. Was found to be the cause.

  An object of this invention is to provide the heat exchanger which suppresses the corrosion of the core plate by the corrosive liquid which exists outside, and can suppress the leakage of the fluid in a header tank in view of the said point.

  The invention according to claim 1 is arranged at a core portion (10) in which a plurality of tubes (11) through which a fluid flows is laminated, and an end portion in a longitudinal direction of the tube, and extends along the lamination direction of the tubes. A heat exchanger including a header tank (20, 30) communicating with a plurality of tubes is intended.

In order to achieve the above object, in the invention described in claim 1,
The header tank
A core plate (21) in which a plurality of tubes are joined in a state where the longitudinal ends of the tubes are inserted into the plurality of tube insertion holes (211a);
A tank body (22) that is fixed to the core plate and forms a tank internal space (20b) that communicates with the plurality of tubes together with the core plate;
A seal member (23) that is sandwiched between the tank body and the core plate and suppresses leakage of fluid from the tank internal space,
The core plate
A tube joint (211) in which a plurality of tube insertion holes are formed;
Surrounding the outside of the tube joint portion, the front end portion (221) of the tank main body portion, and an annular accommodating groove portion (212) for accommodating the seal member,
The housing groove portion is formed on the bottom wall portion (212a) that forms a housing space (21a) for housing the seal member between the opposing surface facing the core plate at the front end portion of the tank main body portion, and on the outer peripheral side of the bottom wall portion. Having an upright outer wall (212b);
The seal member is sandwiched between the bottom wall portion and the bottom surface (221a) facing the bottom wall portion at the tip end portion of the tank main body portion, and the side surface facing the side wall portion at the outer wall portion and the tip end portion of the tank main body portion. (221c).

  Thus, if the sealing member is configured to be sandwiched between the bottom wall portion in the housing groove portion of the core plate and the bottom surface at the tip portion of the tank main body portion, the tank internal space in the header tank can be sealed.

  In addition, in the heat exchanger of the present invention, the seal member is sandwiched between the outer wall portion in the housing groove portion of the core plate and the side surface in the tip portion of the tank main body portion. For this reason, it can suppress that the liquid which has corrosivity from the exterior of a heat exchanger penetrate | invades between the bottom wall part of the accommodating groove part of a core plate, and a sealing member.

  Therefore, it is possible to suppress the core plate from being corroded by the corrosive liquid existing outside the heat exchanger, and to suppress the fluid leakage in the header tank.

  In addition, the code | symbol in the parenthesis of each means described in this column and the claim shows an example of a correspondence relationship with the specific means described in the embodiment described later.

It is a typical front view of the radiator concerning a 1st embodiment. It is a section perspective view of the important section containing the header tank of the radiator concerning a 1st embodiment. It is a front view of the core plate simple substance of the radiator concerning a 1st embodiment. It is a bottom view of the core plate simple substance of the radiator concerning a 1st embodiment. It is sectional drawing when the principal part containing the header tank of the radiator which concerns on 1st Embodiment is cut | disconnected along the tube longitudinal direction. It is sectional drawing at the time of cut | disconnecting the principal part containing the header tank of the radiator which concerns on 1st Embodiment along a tube lamination direction. It is sectional drawing for demonstrating the flow of the liquid in the outer side of the header tank of the radiator which concerns on a comparative example. It is sectional drawing for demonstrating the flow of the liquid in the outer side of the header tank of the radiator which concerns on 1st Embodiment. It is sectional drawing when the principal part containing the header tank of the radiator which concerns on 2nd Embodiment is cut | disconnected along the tube longitudinal direction. It is sectional drawing for demonstrating the flow of the liquid in the outer side of the header tank of the radiator which concerns on 2nd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in each of the following embodiments, parts that are the same as or equivalent to the matters described in the preceding embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

  Moreover, in each embodiment, when only a part of the component is described, the component described in the preceding embodiment can be applied to the other part of the component.

  The following embodiments can be partially combined with each other even if they are not particularly specified as long as they do not cause any trouble in the combination.

(First embodiment)
This embodiment will be described with reference to FIGS. In this embodiment, the heat exchanger according to the present invention is applied to a radiator that is mounted on a vehicle and cools a fluid (for example, cooling water) to be cooled by heat exchange with outside air (outside air). Yes. Specifically, in the present embodiment, the heat exchanger according to the present invention is arranged in a space on the front side of the vehicle, and cools the cooling water of a water-cooled internal combustion engine (not shown) with the outside air to cool it. This is applied to the radiator 1.

  First, the basic configuration of the radiator 1 of the present embodiment will be described with reference to FIG. As shown in FIG. 1, the radiator 1 of this embodiment is comprised with the downflow type heat exchanger which flows a cooling water along an up-down direction. The radiator 1 includes a core portion 10 that is a heat radiating portion that exchanges heat between cooling water of the internal combustion engine and outside air. The core part 10 is configured by a laminated body in which a plurality of tubes 11 and fins 12 are alternately laminated along the horizontal direction. Hereinafter, in the present embodiment, the stacking direction of the tubes 11 and the fins 12 is referred to as a tube stacking direction YD. The tube stacking direction YD is a direction extending along the horizontal direction.

  Each tube 11 is formed therein with a flow path through which cooling water of an internal combustion engine (not shown) flows. Each tube 11 of the present embodiment is configured in a flat shape so that its longitudinal direction extends along the vertical direction, and the direction of the long diameter in its cross section extends along the direction of circulation of outside air.

  Here, the flat shape refers to an elliptical shape composed of a curved shape obtained by combining an arc portion having a large curvature radius and an arc portion having a small curvature radius, an oval shape comprising a shape obtained by combining an arc portion and a flat portion, and the like. It is included. In the present embodiment, for convenience of explanation, the longitudinal direction of the tube 11 is referred to as a tube longitudinal direction XD, and the direction orthogonal to the tube longitudinal direction XD and the tube stacking direction YD is referred to as a tube width direction ZD. The tube width direction ZD is a direction that coincides with the direction of the long diameter of the tube 11.

  The fins 12 are members that increase the heat transfer area with the outside air and promote heat exchange between the outside air and the cooling water. The fins 12 of the present embodiment are formed in a corrugated shape and are joined to the flat surfaces on both sides of the tube 11.

  Each tube 11 and each fin 12 of the present embodiment are made of a metal (for example, an aluminum alloy) excellent in thermal conductivity, corrosion resistance, and the like. In the radiator 1 of the present embodiment, each tube 11, fins 12, a core plate 21 to be described later, and a side plate 40 to be described later are integrally brazed and joined by a brazing material coated at a predetermined position of each member.

  A pair of header tanks 20 and 30 extending in the tube stacking direction YD and having a space formed therein are disposed at both ends of each tube 11 in the tube longitudinal direction XD. Each header tank 20 and 30 is joined in a state in which the end portion of each tube 11 in the tube longitudinal direction XD is inserted into a tube insertion hole 211a of the core plate 21 described later. The internal passage in each tube 11 communicates with a tank internal space 20 b formed inside each header tank 20, 30.

  Of the pair of header tanks 20, 30, one header tank constitutes an inlet side tank 20 that distributes and supplies high-temperature cooling water flowing out from the internal combustion engine to each tube 11. The inlet side tank 20 is provided with an inlet pipe 20a connected to the outlet side of the cooling water of the internal combustion engine via a hose (not shown).

  Of the pair of header tanks 20, 30, the other header tank constitutes an outlet side tank 30 that collects and collects cooling water cooled by heat exchange with the outside air in the core portion 10. The outlet side tank 30 is provided with an outlet pipe 30a connected to the cooling water inlet side of the internal combustion engine via a hose (not shown).

  Side plates 40 that reinforce the core portion 10 are disposed at both ends of the core portion 10 in the tube stacking direction YD. The side plate 40 extends along the tube longitudinal direction XD, and both ends thereof are connected to the header tanks 20 and 30. The side plate 40 of the present embodiment is made of a metal such as an aluminum alloy.

  Next, the detailed structure of each header tank 20, 30 will be described with reference to FIGS. As shown in FIG. 2, each header tank 20, 30 is a tank body that forms a tank internal space 20 b of each header tank 20, 30 together with the core plate 21 and the core plate 21 joined in a state where the tube 11 is inserted. A portion 22 and a seal member 23 are provided.

  In this embodiment, in a state where the seal member 23 is sandwiched between the core plate 21 and the tank main body 22, the tank main body is plastically deformed so as to press a protruding piece 213 of the core plate 21 described later against the tank main body 22. The portion 22 is caulked and fixed to the core plate 21.

  The core plate 21 of the present embodiment is made of a metal (for example, an aluminum alloy) excellent in thermal conductivity, corrosion resistance, and the like. As shown in FIGS. 3 and 4, the core plate 21 houses a tube joint portion 211 that joins the tube 11, and a flange portion 221 and a seal member 23 of the tank main body portion 22, which will be described later, around the tube joint portion 211. An annular housing groove 212 is provided.

  As shown in FIGS. 4 and 5, the housing groove 212 has three wall surfaces and is configured in a U shape. That is, the housing groove 212 is a bottom wall 212a extending in the tube width direction ZD when viewed from the tube stacking direction YD, and an outer wall 212b that is bent in an L shape from the bottom wall 212a and extends in the tube longitudinal direction XD. And an inner wall portion 212c.

  An accommodating space 21a for accommodating the seal member 23 is formed between each of the wall portions 212a to 212c and a facing surface of the flange portion 221 of the tank main body portion 22 described later that faces the core plate 21.

  The outer side wall portion 212b is a wall portion erected on the outer peripheral side of the bottom wall portion 212a. Further, the inner wall portion 212c is a wall portion erected on the inner peripheral side of the bottom wall portion 212a. A plurality of caulking protruding pieces 213 are formed at the end of the outer wall 212b of the housing groove 212 as shown in FIG.

  As shown in FIGS. 4 and 5, the tube joining portion 211 has a plurality of tube insertion holes 211a for brazing and joining in the state in which the end portions of the tube longitudinal direction XD in each tube 11 are inserted. Are arranged at predetermined intervals.

  The core plate 21 of the present embodiment is configured by connecting the tube joint portion 211 and the inner wall portion 212c of the housing groove portion 212. Thereby, as for the core plate 21, the site | part between the tube junction part 211 and the bottom wall part 212a of the accommodation groove part 212 becomes a stepped shape.

  Next, the tank body 22 will be described. The tank body 22 of the present embodiment is formed of a resin such as glass reinforced polyamide reinforced with glass fibers. In the tank main body portion 22 of the present embodiment, a flange portion 221 having a larger thickness than other portions is provided at a tip portion close to the core plate 21.

  The flange portion 221 is formed in a size that can be accommodated in the accommodation groove portion 212. The flange portion 221 has a bottom surface 221 a that faces the bottom wall portion 212 a of the housing groove portion 212, and a side surface 221 c that faces the outer wall portion 212 b of the housing groove portion 212.

  The bottom surface 221a of the flange portion 221 of the present embodiment is provided with a protruding portion 221b that protrudes toward the bottom wall portion 212a side of the housing groove portion 212. The protrusion 221b is provided to stabilize the position and the like of the first seal portion 231 when pressing a first seal portion 231 of a seal member 23 described later against the bottom wall portion 212a side of the housing groove portion 212.

  The flange portion 221 is configured such that the bottom surface 221a of the flange portion 221 and the bottom wall portion 212a of the accommodation groove portion 212 are separated from each other, and the side surface 221c of the flange portion 221 and the outer wall portion 212b of the accommodation groove portion 212 are separated from each other. 212. Thereby, an accommodation space 21 a for accommodating the seal member 23 is formed between the flange portion 221 and the accommodation groove portion 212.

  Next, the seal member 23 will be described. The seal member 23 of the present embodiment includes a first seal portion 231 and a second seal portion 232 that are configured by separate members. Each of the seal portions 231 and 232 is formed in an annular shape so as to be accommodated in the accommodation groove portion 212. Each of the seal portions 231 and 232 is made of elastically deformable rubber. In addition, what is necessary is just to form each seal | sticker part 231 and 232 by silicon rubber or EPDM (ethylene propylene diene rubber), for example.

  The first seal portion 231 of this embodiment is provided to seal the tank internal space 20b of the header tanks 20 and 30. The first seal portion 231 of the present embodiment is sandwiched between the bottom wall portion 212a of the housing groove portion 212 and the bottom surface 221a of the flange portion 221 in an elastically deformed state.

  The second seal portion 232 of the present embodiment is provided to prevent the corrosive liquid from entering the space between the housing groove portion 212 and the first seal portion 231 from the outside of the radiator. The first seal portion 231 of the present embodiment is sandwiched between the outer wall portion 212b of the housing groove portion 212 and the side surface 221c of the flange portion 221 in an elastically deformed state.

  Next, the outline of the manufacturing method of the radiator 1 provided with the said structure is demonstrated. First, each part which comprises the radiator 1 is prepared (preparation process). This preparation step includes a step of forming the core plate 21 having the tube joint portion 211, the housing groove portion 212, and the protruding piece 213.

  Then, the core part 10 etc. are temporarily assembled by assembling | attaching the tube 11, the fin 12, and the side plate 40 which were prepared at the preparation process on the workbench in the tube lamination direction YD (temporary assembly process).

  Then, after the core plate 21 in which the tube insertion hole 211a is formed is assembled to the core portion 10, the state of being assembled by a jig such as a wire is held. By placing the assembly in a state where the core plate 21 is assembled to the core part 10 in a heated furnace, the elements of the core plate 21 and the core part 10 are joined by brazing (brazing joining process). .

  After the brazing joining process is completed, the flange portion 221 and the seal member 23 of the tank main body portion 22 are accommodated in the accommodation groove portion 212 of the core plate 21. Specifically, the first seal portion 231 is disposed on the bottom wall portion 212a of the housing groove portion 212, and the flange portion 221 and the housing groove portion 212 are wound around the side surface 221c of the flange portion 221 with the second seal portion 232 wound around the side surface 221c. The seal member 23 is accommodated.

  Then, in a state in which the flange portion 221 and the seal member 23 are accommodated in the accommodation groove portion 212, the tank main body portion 22 is caulked against the core plate 21 by plastically deforming the protruding pieces 213 of the core plate 21 by pressing or the like. Fix it.

  Subsequently, the manufacturing of the radiator 1 is completed through an inspection process for performing a leakage inspection, a dimension inspection, and the like. In the leakage inspection or the like, it is confirmed whether or not there is a brazing defect or a caulking defect at the joint portion of the radiator 1.

  The radiator 1 of the present embodiment described above has the following effects by having the above-described configuration. In the radiator 1 of the present embodiment, the first seal portion 231 of the seal member 23 is elastically deformed between the bottom wall portion 212a of the housing groove portion 212 of the core plate 21 and the bottom surface 221a of the flange portion 221 of the tank main body portion 22. It is configured to be held in a state. Thereby, the tank internal space 20b of each header tank 20 and 30 can be sealed.

  Here, FIG. 7 shows a configuration in which only the first seal portion 231 of the seal member 23 is disposed between the bottom wall portion 212a of the housing groove portion 212 and the side surface 221c of the flange portion 221 (hereinafter referred to as a comparative example). It is sectional drawing which shows the principal part.

  In the configuration according to the comparative example, the first seal portion 231 seals the tank internal space 20 b of each header tank 20, 30, thereby suppressing leakage of cooling water from the header tanks 20, 30.

  However, in the configuration according to the comparative example, the corrosive liquid (for example, seawater or acid rain) from the outside, as indicated by the arrows in FIG. 7, the side surfaces of the outer wall portion 212 b of the housing groove portion 212 and the flange portion 221. It penetrates into the bottom wall 212a side of the housing groove 212 from the gap C with respect to 221c.

  And if the liquid which has corrosivity accumulates in the bottom wall part 212a of the accommodation groove part 212, the site | part which contact | connects the 1st seal | sticker part 231 in the bottom wall part 212a will corrode. Due to this corrosion, a minute gap is formed between the bottom wall portion 212 a and the first seal portion 231, so that the cooling water may slightly leak from the header tanks 20 and 30.

  On the other hand, in the radiator 1 of the present embodiment, the second seal portion of the seal member 23 is provided between the outer wall portion 212b of the housing groove portion 212 of the core plate 21 and the side surface 221c of the flange portion 221 of the tank main body portion 22. 232 is held in an elastically deformed state.

  According to this, as shown in FIG. 8, the gap C between the outer wall portion 212 b of the housing groove portion 212 and the side surface 221 c of the flange portion 221 is closed by the second seal portion 232. For this reason, it can suppress that the liquid which has corrosivity penetrate | invades into the bottom wall part 212a side of the accommodation groove part 212 from the clearance gap C of the outer side wall part 212b of the accommodation groove part 212, and the side surface 221c of the flange part 221. .

  Therefore, according to the radiator 1 of the present embodiment, it is possible to suppress the corrosion of the core plate 21 due to the corrosive liquid existing outside the radiator 1 and to suppress the leakage of the fluid in the header tanks 20 and 30.

  In this embodiment, each seal part 231 and 232 which constitute seal member 23 is constituted by another member. According to this, each seal part 231 and 232 can be provided in arbitrary positions, and the freedom degree of design can be ensured.

  Here, the radiator that is mounted on the vehicle and cools the fluid flowing in the tube 11 in the core portion 10 by exchanging heat with the outside air is cooled with the outside air by a corrosive liquid (for example, seawater or acid rain). Easy to flow in. For this reason, as in the present embodiment, it is particularly desirable to use a structure that suppresses the entry of the corrosive liquid into the bottom wall portion 212a of the storage groove 212 as in the present embodiment.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the single sealing member 23 is configured to suppress the penetration of the corrosive liquid into the bottom wall 212a side of the storage groove 212.

  As shown in FIG. 9, in the seal member 23 of the present embodiment, a first seal portion 23a and a second seal portion 23b are connected via a connecting portion 23c. Each of the seal portions 23a and 23b and the connecting portion 23c are integrally formed by injection molding or the like.

  Here, if the thickness of the connecting portion 23c is larger than the thickness of each of the seal portions 23a and 23b, there is a concern that the gap between the housing groove portion 212 and the flange portion 221 is sealed at an unintended position. For this reason, it is desirable to make the thickness of the connection part 23c smaller than the thickness of each seal part 23a, 23b.

  Other configurations are the same as those of the first embodiment. In the present embodiment, the second seal portion 23b of the seal member 23 is sandwiched between the outer wall portion 212b of the housing groove portion 212 and the side surface 221c of the flange portion 221. For this reason, similarly to the first embodiment, the corrosion of the core plate 21 due to the corrosive liquid existing outside the radiator 1 can be suppressed, and the fluid leakage in the header tanks 20 and 30 can be suppressed.

  Moreover, in this embodiment, the 1st seal part 23a and the 2nd seal part 23b are comprised with the single member. For this reason, the radiator 1 which can suppress the corrosion of the core plate 21 by the liquid which has the corrosiveness which exists outside with a simple structure without increasing the number of parts is realizable.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, In the range described in the claim, it can change suitably. For example, various modifications are possible as follows.

  (1) In the above-described embodiments, the example in which the radiator 1 is configured by a downflow type heat exchanger that flows cooling water along the vertical direction has been described. However, the present invention is not limited to this. The radiator 1 may be configured by, for example, a cross-flow heat exchanger that flows cooling water along the horizontal direction.

  (2) In each of the above-described embodiments, the example in which the heat exchanger of the present invention is applied to the vehicle radiator 1 has been described, but the present invention is not limited to this. The heat exchanger of the present invention may be applied to an outdoor heat exchanger of a refrigeration cycle for a vehicle, or may be applied to a radiator such as a stationary refrigerator used for other than a vehicle.

  (3) In the above-described embodiment, the elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Needless to say.

  (4) In the above-mentioned embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly indicated that it is essential and clearly in a specific number in principle. It is not limited to the specific number except in a limited case.

  (5) In the above-described embodiment, when referring to the shape, positional relationship, etc. of the component, etc., unless otherwise specified, the shape is limited to a specific shape, positional relationship, etc. in principle. The positional relationship is not limited.

21 Core plate 211 Tube joint 211a Tube insertion hole 212 Housing groove 212a Bottom wall 212b Outer wall 22 Tank body 221 Flange (front end of tank body)
221a Bottom 221c Side 23 Seal member

Claims (4)

A core portion (10) in which a plurality of tubes (11) through which fluid flows are laminated;
A header tank (20, 30) disposed at an end of the tube in the longitudinal direction, extending along the stacking direction of the tubes and communicating with the plurality of tubes;
The header tank is
A core plate (21) to which the plurality of tubes are joined in a state where the longitudinal ends of the tubes are inserted into the plurality of tube insertion holes (211a);
A tank body (22) fixed to the core plate and forming a tank internal space (20b) communicating with the plurality of tubes together with the core plate;
A seal member (23) that is sandwiched between the tank body and the core plate and suppresses leakage of fluid from the tank internal space,
The core plate is
A tube joint portion (211) in which the plurality of tube insertion holes are formed;
Surrounding the outside of the tube joint, and having a tip (221) of the tank body and an annular receiving groove (212) for receiving the seal member,
The housing groove portion includes a bottom wall portion (212a) that forms a housing space (21a) for housing the seal member between a front surface of the tank main body portion facing the core plate, and the bottom wall portion. An outer wall portion (212b) erected on the outer peripheral side of the portion,
The seal member is sandwiched between the bottom wall portion and a bottom surface (221a) facing the bottom wall portion at the front end portion of the tank main body portion, and at the outer wall portion and the front end portion of the tank main body portion. The heat exchanger is sandwiched between a side surface (221c) facing the side wall portion. The sealing member is
A first seal portion (231) sandwiched between the bottom wall portion and a bottom surface of the front end portion of the tank body portion facing the bottom wall portion;
A second seal portion (232) sandwiched between the side wall portion and a side surface of the front end portion of the tank body portion facing the side wall portion;
The heat exchanger according to claim 1, wherein the first seal part and the second seal part are configured as separate members. The sealing member is
A first seal portion (23a) sandwiched between the bottom wall portion and a bottom surface of the front end portion of the tank body portion facing the bottom wall portion;
A second seal portion (23b) sandwiched between the side wall portion and a side surface of the front end portion of the tank body portion facing the side wall portion;
The heat exchanger according to claim 1, wherein the first seal part and the second seal part are formed of a single member. Consists of a radiator mounted on the vehicle,
The said core part comprises the thermal radiation part which heat-exchanges the fluid which flows through the inside of these tubes with the air outside a vehicle compartment, and cools it, The structure of any one of Claim 1 thru | or 3 characterized by the above-mentioned. Heat exchanger.

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