JP2008057850A - Manufacturing method of heat exchanger, and heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat exchanger capable of preventing liquid leakage. <P>SOLUTION: A liquid or gel-like seal material 54 is applied to sealing faces 53 of headers 5a, 5b before fastening tank main bodies 50b and core plates 50a, and then the seal material 54 is hardened by irradiation of ultraviolet ray. The core plate 50a and the tank main body 50b are fastened in a state of sealing up between a sealing face 51c of the core plate 50a and the sealing face 53 of the tank main body 50b by the seal material 54. As the core plate 50a and the tank main body 50b are sealed up by the seal material 54 when the core plate 50a and the tank main body 50b are fastened, the leakage of engine cooling water can be prevented beforehand. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a heat exchanger and a manufactured heat exchanger.

  In the conventional heat exchanger, a plurality of tubes through which fluid flows, heat exchange fins joined to the outer surface of the tubes, and a first fluid that communicates with each of the plurality of tubes and divides the fluid into the plurality of tubes. And a second header tank that communicates with each of the plurality of tubes and collects fluid from the plurality of tubes (see, for example, Patent Document 1).

  In this structure, each of the first and second header tanks includes a core plate to which a tube is joined, and a tank body that forms a tank internal space together with the core plate.

  Here, in the process of manufacturing the first and second header tanks, the core plate, the tank main body, and the packing member are separately prepared, and rubber or the like is provided between the seal surface of the tank main body and the seal surface of the core plate. The core plate and the tank body are fastened in a state where the packing member made of the elastic body is sandwiched.

Therefore, the seal member seals between the seal surface of the tank body and the seal surface of the core plate, thereby preventing fluid from leaking from the space in the tank.
JP-A-3-138116

  In the above heat exchanger, an elastic body such as rubber is used as the packing member. Therefore, when the core plate and the tank body are fastened, the packing member may be elastically deformed and twisted or misaligned. is there. In this case, a minute gap is formed between the sealing surface of the tank body and the sealing surface of the core plate, so that fluid may leak from the space in the tank.

  An object of this invention is to provide the manufacturing method of the heat exchanger which prevented the fluid leak in view of the said point.

  In order to achieve the above object, in the present invention, a liquid or gel sealing material is applied to the sealing surface of the tank body and cured, and the cured sealing material adheres to the sealing surface of the tank body due to adhesiveness. In addition, the core plate and the tank main body are fastened in a state where the seal material is elastically deformed to seal between the seal surface of the core plate and the tank main body seal surface.

  Thereby, when fastening between the core plate and the tank body, the seal material can be sealed between the seal surface of the core plate and the tank body seal surface without causing twisting and displacement, Fluid leakage can be prevented.

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

(First embodiment)
1 to 4 show a first embodiment in which a heat exchanger according to the present invention is applied to a radiator 1 of a vehicle air conditioner. FIG. 1 is a front view of the radiator 1 of the present embodiment as viewed from the air flow direction.

  The radiator 1 of the present embodiment is a heat exchanger that is disposed in an engine room of an automobile and cools engine cooling water with blown air blown from a blower.

  As shown in FIG. 1, the radiator 1 includes a plurality of tubes 2, fins 3, side plates 4a and 4b, and header tanks 5a and 5b.

  The plurality of tubes 2 are flat tubes through which engine coolant flowing out from the engine flows, and these tubes 2 are made of a light metal having a high thermal conductivity such as an aluminum alloy. In the present embodiment, as a member constituting the tube 2, a clad material whose front surface (or back surface) is coated with a filler material is used.

  The fins 3 are joined to the outer surface of the tube 2 to increase the heat transfer area with the cooling air and promote heat exchange between the air and the engine coolant. As the fin 3 according to the present embodiment, a corrugated fin that is roller-shaped in a wave shape as viewed from the flow direction with the cooling air is employed. The fins 3 together with the plurality of tubes 2 constitute a substantially rectangular core portion 4 that cools the engine coolant.

  The side plates 4 a and 4 b are arranged so as to sandwich the core portion 4 from the up and down direction in FIG. 1 and extend in a direction parallel to the longitudinal direction of the tube 2 to reinforce the core portion 4. The side plates 4a and 4b are made of a light metal such as an aluminum alloy.

  The header tank 5 is located at both ends of the tube 2 in the longitudinal direction, extends in a direction orthogonal to the longitudinal direction of the tube 2 and communicates with each tube 2. In the present embodiment, the header tank 5a on the left side in FIG. 1 distributes the high-temperature engine coolant that has flowed out of the engine to each tube 2. The header tank 5 b on the right side in FIG. 1 distributes the engine coolant that has been cooled (ie, heat exchanged) by the core 4. It is recovered from the tube 2 and returned to the engine.

  Here, the introduction pipe 6a is connected to the engine cooling water outflow side of the engine, and the outlet pipe 6b is connected to the engine cooling water inflow side of the engine.

  The header tanks 5a and 5b have substantially the same structure (except for the pipes 6a and 6b). Hereinafter, the structure of the header tank 5a will be described as a representative example.

  2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged cross-sectional view showing the internal structure of the portion B in FIG.

  As shown in FIG. 2, the header tank 5a has a core plate 50a and a tank body 50b that constitutes a tank internal space 50c together with the core plate 50a.

  The core plate 50a is a substantially rectangular plate member made of an aluminum alloy, and the core plate 50a is provided with each through hole 56, as shown in FIG. Tube 2 (two tubes are shown in the figure) and side plates 4a and 4b (the side plate 4b is omitted in the figure) are penetrated.

  As shown in FIGS. 3 and 4, the core plate 50a is provided with a plurality of fastening claws 51a. The plurality of caulking claws 51a surround the core plate 50a as shown in FIG. Are arranged like so. Each caulking claw 51a is used to fasten between the core plate 50a and the tank body 50b as will be described later. FIG. 4 shows a state in which the tank body 50 b is removed from the radiator 1.

  Here, on the inner side of each caulking claw 51a in the core plate 50a, as shown in FIG. 3, as shown in FIGS. 2 and 3, a U-shaped groove 51b having a cross-section that sandwiches the end 52 of the tank body 50b. Is formed. The U-shaped cross section 51b is formed in an annular shape along the outer periphery of the core plate 50a, and a seal surface 51c is formed at the bottom of the groove 51b.

  In addition, the board | plate material which comprises the core plate 50a uses the clad material which coat | covered the filler material on the surface where a tube is inserted, and the board | plate material which comprises side plate 4a, 4b is melted on the surface which touches a tube A clad material coated with a material is used.

  The tank body 50b is made of a resin material, and is formed in a U-shaped cross section having a recess that constitutes the tank internal space 50c. The end 52 of the tank body 50b is formed in an annular shape so as to surround the tank internal space 50c, and the end 52 of the tank body 50b is formed so as to protrude outward as shown in FIG. . A seal surface 53 is formed on the distal end side of the end portion 52 of the tank body 50b.

  An annular sealing material 54 is provided between the sealing surface 53 of the tank main body 50b and the sealing surface 51c of the core plate 50a, and the sealing material 54 seals between the sealing surfaces 53 and 51b and closes the inside of the tank. The engine coolant is prevented from leaking from the space 50c.

  Here, as the sealing material 54 of this embodiment, an ultraviolet curable resin such as an acrylic resin is used, and as the sealing material 54, a resin material having a small deterioration with respect to the antifreeze contained in the engine coolant is particularly preferable. . The sealing material 54 is not limited to an ultraviolet curable resin, and a thermosetting resin that is cured by heat can be used.

  Next, a method for manufacturing the radiator 1 according to this embodiment will be described.

  First, a plurality of tubes 2, a core plate 50a, fins 3, and side plates 4a and 4b are prepared.

  Next, after the fins 3 are loaded between the plurality of tubes 2 arranged at predetermined intervals and the core portion 4 is temporarily assembled, each tube 2 and each of the tubes 2 are inserted into the through holes of the core plate 50a of the header tank 5a. The side plates 4a and 4b are inserted.

  Next, the inner diameter of one end portion of the tube 2 in the longitudinal direction (that is, a portion of the tube 2 that reaches the portion corresponding to the tank internal space 50c through the core plate 50a) is enlarged, and the tube 2 is The tube 2 and the core plate 50a are temporarily fixed by expanding the tube.

  Next, the tubes 2 and the side plates 4a and 4b are inserted into the through holes 56 of the core plate 50a of the header tank 5b. Accordingly, the inner diameter of the other end portion in the longitudinal direction of the tube 2 is enlarged, and the tube 2 is expanded to temporarily fix each tube 2 and the core plate 50a of the header tank 5b.

  As a result, the temporary fixing (temporary assembly) of the core plates 50a, the tubes 2, the fins 3, and the side plates 4a and 4b of the header tanks 5a and 5b is completed, and this state is held by the jig and is kept in the furnace. As shown in FIG. 4, the core portion 4 (that is, the tube 2 and the fin 3), the side plates 4a and 4b, and the core plate 50a are integrally joined by brazing.

  Next, as shown in FIG. 5A, an injector 60 filled with a gel (or liquid) sealant 54 and a tank body 50b of the header tank 5a are prepared, and the tank body of the header tank 5a is prepared. A gel-like sealing material 54 extruded from an injector (injector) 60 is applied on the upper side of the sealing surface 53 of 50b. When the sealing material 54 is applied, the cross-sectional shape of the gel-like sealing material 54 is convex upward (on the opposite side to the sealing surface 53).

  In other words, the sealing material 54 is applied to the sealing surface 53 so that the cross-sectional shape of the gel-like sealing material 54 protrudes upward.

  Here, since the seal surface 53 is formed in an annular shape as described above, a wrap portion 73 where the application start position 70 and the application end position 71 of the seal material 54 overlap is provided as shown in FIGS. . 6 is a view schematically showing the seal surface 53 of the tank body 50b, and FIG. 7 is an enlarged view of the wrap portion 73 of the seal material 54 applied to the seal surface 53. As shown in FIG.

  Here, the wrap portion 73 is disposed on the straight portion 80 extending linearly in the annular seal surface 53. Further, the gel-like sealing material 54 injected from the injector 60 is also applied to the sealing surface 53 of the header tank 5b (application process).

  Thereafter, the gel-like sealing material 54 applied to the tank main bodies 50b of the header tanks 5a and 5b is irradiated with ultraviolet rays to be cured (see FIG. 5B: ultraviolet irradiation step).

  Next, the sealing material 54 applied to the tank body 50b of the header tank 5a is brought into close contact with the sealing surface 51c of the core plate 50a (see FIG. 5 (c)), and further, the caulking claws 51a are caulked. The main body 50b and the core plate 50a are fastened (see FIG. 5D: fastening process). Here, among the caulking claws 51 a of the header tank 5 a, at least one caulking claw 51 a is overlapped with the wrap portion 73. Thereby, manufacture of the header tank 5a is completed.

  Similarly, the sealing material 54 applied to the tank body 50b of the header tank 5b is brought into close contact with the sealing surface 51c of the core plate 50a, and the caulking claws 51a are further crimped to fasten the tank body 50b and the core plate 50a. (Fastening process). Here, among the caulking claws 51 a of the header tank 5 b, at least one caulking claw 51 a is overlapped with the wrap portion 73. Thereby, manufacture of the header tank 5b is completed.

  In the present embodiment described above, before the tank body 50b and the core plate 50a are fastened, the liquid or gel seal material 54 is applied to the seal surfaces 53 of the header tanks 5a and 5b, and then the seal material 54 is applied. Cured by UV irradiation.

  Here, the cured sealing material 54 has adhesiveness to the applied tank side, and does not cause twisting or displacement after application.

  The core plate 50a and the tank main body 50b are fastened in a state where the seal surface 51c of the core plate 50a and the seal surface 53 of the tank main body 50b are sealed with this sealant.

  Therefore, when the core plate 50a and the tank main body 50b are fastened, the seal surface 51c of the core plate 50a and the seal surface 53 of the tank main body 50b can be hermetically sealed. Can be prevented.

  Here, since the cured sealing material 54 has adhesion to the tank side as described above, the cured sealing material 54 is placed on the sealing surfaces 53 of the header tanks 5a and 5b. Even if it is turned upside down, the sealing material 54 is in close contact with the sealing surface 53 of the header tanks 5a and 5b without leaving.

  Therefore, the header tanks 5a and 5b can be directed in a free direction in a state where the sealing material 54 is cured. For this reason, after applying the sealing material 54 to the respective tank main bodies 50b of the header tanks 5a and 5b and curing, the respective tank main bodies 50b can be simultaneously fastened to the respective core plates 50a. Become.

  In the present embodiment, since the liquid or gel seal material 54 is applied to the tank body 50b to form a seal shape, it is not necessary to prepare the seal material 54 in advance for each header tank having a different shape.

  Further, since the liquid or gel-like sealing material 54 is applied to the tank body 50b to form a seal shape, even if the seal surface 53 of the tank body 50b has a complicated shape, it follows the complicated seal surface 53. Thus, the sealing material 54 can be easily applied.

  In the present embodiment, a wrap portion 73 where the application start position 70 and the application end position 71 of the seal material 54 overlap is provided, and the wrap portion 73 is disposed on the straight portion 80 of the annular seal surface 53.

  Furthermore, there is a concern that the wrap portion 73 has a gap between the application start position 70 and the application end position 71 and may lead to leakage of engine cooling water. It is easier to apply the sealing material 54 than the corner (curved portion), and it is easy to manage the shape of the sealing material 54. Therefore, by arranging the annular seal surface 53 in the straight portion 80, the generation of the gap can be suppressed and the occurrence of leakage of engine cooling water can be prevented.

  Here, since the caulking claw 51a is caulked in a state of overlapping the wrap portion 73, pressure can be applied from the caulking claw 51a to the wrap portion 73 (sealing material 54) via the end portion 52 of the tank body 50b. . For this reason, generation | occurrence | production of the clearance gap in the lap | wrap part 73 can be suppressed, and since the sealing material 54 can be closely_contact | adhered with respect to the sealing surface 51c of the core plate 50a and the sealing surface 53 of the tank main body 50b, more powerful engine The occurrence of cooling water leakage can be prevented.

  Further, since the sealing material 54 of the present embodiment is applied so as to protrude upward, the cured sealing material 54 is easily compressed, and the compression rate is easily secured. Therefore, the seal surface 51c of the core plate 50a and the seal surface 53 of the tank body 50b can be satisfactorily adhered.

(Second Embodiment)
In the second embodiment, as shown in FIG. 8, a groove (specifically, a semicircular cross section) is provided on the seal surface 53 of the tank body 50b, and the sealing material 54 is applied so as to fill the groove. Accordingly, the cured sealing material 54 can be hardly separated from the sealing surface 53, and thus the positional deviation of the sealing material 54 can be reliably prevented.

  In the above-described second embodiment, the example in which the groove portion has a semicircular cross section on the seal surface 53 of the tank body 50b has been described. However, the present invention is not limited thereto, and the groove may have various shapes such as a triangular cross section. .

(Third embodiment)
In the second embodiment, as shown in FIG. 9, a minute unevenness is provided on the sealing surface of the tank body 50b, and the sealing material 54 is applied so as to fill the unevenness. Thereby, since the sealing material 54 is engaged with the unevenness, the positional deviation of the sealing material 54 can be reliably prevented.

(Fourth embodiment)
In the first to third embodiments described above, the description has been given of the case where one tank space is configured in the header tank 5a. Instead, in the fourth embodiment, two header tanks 5a are provided in the header tank 5a. Configure the tank space.

  In the header tank 5a of the present embodiment, as shown in FIG. 10, a partition wall 6c that separates the two tank inner spaces 60a and 60b is provided in the tank body 50b. For this reason, the sealing surface 53 of the tank main body 50b of this embodiment is formed also in the end surface of the division wall 6c other than the cyclic | annular sealing surface 53, as shown in FIG.

  For this reason, the sealing material 54 is applied so as to surround the tank internal spaces 60 a and 60 b along the seal surface 53. In addition, since processes, such as application | coating of the sealing material 54 and hardening, are the same as that of the above-mentioned 1st Embodiment, description is abbreviate | omitted.

  In this embodiment, the header tank 5a is provided with an introduction pipe 6a and a lead-out pipe 6b. The header tank 5b is not provided with pipes 6a and 6b.

  In the radiator 1 of the present embodiment configured as described above, in the header tank 5a, the engine coolant flowing into the tank internal space 60a from the introduction pipe 6a is distributed to each tube 2 of the upper core 40a in FIG. After cooling by each tube 2, it flows into the header tank 5b.

  Thereafter, the water is distributed from the header tank 5b to each tube 2 of the lower core 40b in the drawing, and flows into the tank internal space 60b of the header tank 5a after being cooled by each tube 2. Thereafter, the engine returns from the outlet pipe 6b to the engine.

(Other embodiments)
In the above-described fourth embodiment, the two tank internal spaces are configured in the header tank 5a. However, the present invention is not limited to this, and three or more tank internal spaces may be configured.

  In the first to fourth embodiments described above, an example in which the gel-like sealing material 54 applied to the tank body 50b is cured after the application has been described, but instead, the gel is applied to the tank body 50b. The sealing material 54 in the shape (or liquid) may be applied and cured at the same time. In this case, an ultraviolet curable resin that is cured by ultraviolet rays may be used as the sealing material 54, and the sealing material 54 may be applied while irradiating the sealing material 54 with ultraviolet rays. Further, when using a thermosetting resin, the sealing material 54 is applied while applying heat to the sealing material 54.

  In the above-described first to fourth embodiments, the example in which the heat exchanger according to the present invention is applied to the radiator has been described. Further, the present invention may be applied to various heat exchangers such as a heater core unit and an evaporator. Here, the fluid flowing in the heat exchanger is not limited to engine cooling water, and a refrigerant or the like can be used.

It is a figure which shows the structure of 1st Embodiment of the radiator which concerns on this invention. It is AA sectional drawing of FIG. It is an expanded sectional view of B section in FIG. It is a figure which shows the state which removed the tank main body from the radiator of FIG. It is a figure for demonstrating the assembly of the header tank of the radiator of FIG. It is a figure which shows the sealing surface of the header tank of FIG. FIG. 7 is an enlarged view of a portion C in FIG. 6. It is a figure which shows a part of tank main body and sealing material of 2nd Embodiment of this invention. It is a figure which shows a part of tank main body and sealing material of 3rd Embodiment of this invention. It is a figure which shows the structure of 4th Embodiment of the radiator which concerns on this invention. It is a figure which shows the sealing surface of the header tank of FIG.

Explanation of symbols

2 ... tube, 3 ... fin, 4a, 4b ... side plate,
5a, 5b ... header tank, 50b ... tank body,
50a ... Core plate, 51c, 53 ... Sealing surface, 54 ... Sealing material.

Claims (30)

Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
In the method of manufacturing a heat exchanger, the header tank includes a core plate to which the tube is joined, and a tank main body that forms a space in the tank together with the core plate.
Applying or curing a liquid or gel sealing material to the sealing surface of the tank body,
In a state where the cured sealing material is in close contact with the sealing surface of the tank body due to adhesiveness, and the sealing material is elastically deformed to seal between the sealing surface of the core plate and the tank body sealing surface, A method of manufacturing a heat exchanger, wherein the core plate and the tank body are fastened. Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
In the method of manufacturing a heat exchanger, the header tank includes a core plate to which the tube is joined, and a tank body having a partition wall that partitions a plurality of tank internal spaces together with the core plate. ,
Applying and curing the liquid or gel-like sealing material so as to surround the space in each tank with respect to the sealing surface of the tank body,
In a state where the cured sealing material is in close contact with the sealing surface of the tank body due to adhesiveness, and the sealing material is elastically deformed to seal between the sealing surface of the core plate and the tank body sealing surface, A method of manufacturing a heat exchanger, wherein the core plate and the tank body are fastened. The method for manufacturing a heat exchanger according to claim 1 or 2, wherein the applied sealing material is cured after the sealing material is applied to the sealing surface of the tank body. 3. The method of manufacturing a heat exchanger according to claim 1, wherein the sealing material is cured simultaneously with the application of the sealing material to the sealing surface of the tank body. The heat exchanger according to any one of claims 1 to 4, wherein the sealing material is applied on a side opposite to the sealing surface of the tank body so that a cross-sectional shape of the sealing material is a convex shape. Manufacturing method. 6. The method of manufacturing a heat exchanger according to claim 5, wherein the sealing material is applied so as to have a substantially semicircular cross section as the convex shape. The method for manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the sealing material is applied so as to fill the unevenness with respect to a sealing surface having unevenness in the tank body. The method for manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the sealing material is applied so as to fill the groove with respect to a sealing surface having the groove in the tank body. The sealing material is applied so as to fill the semicircular groove section with respect to a sealing surface having a semicircular groove section in the tank body. Method of manufacturing a heat exchanger. The method for manufacturing a heat exchanger according to any one of claims 1 to 9, wherein the core plate and the tank body are fastened by caulking. The heat exchanger according to any one of claims 1 to 10, wherein the core plate and the tank main body are fastened by caulking a caulking claw of the core plate to the tank main body. Production method. 12. The method of manufacturing a heat exchanger according to claim 11, wherein one or more lap portions where the application start position and the application end position of the sealing material overlap are formed on the tank body. The heat exchanger according to claim 12, wherein the sealing material is applied to the sealing surface so as to form the wrap portion in a straight portion extending linearly among the sealing surfaces of the tank body. Production method. The method for manufacturing a heat exchanger according to claim 12 or 13, wherein the caulking claws are caulked in a state of overlapping with the wrap portion. The method for manufacturing a heat exchanger according to any one of claims 1 to 14, wherein the liquid or gel sealant is cured by ultraviolet rays. The method for manufacturing a heat exchanger according to any one of claims 1 to 15, wherein the liquid or gel sealant is cured by heat. Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank is configured to include a core plate to which the tube is joined, and a tank body that is fastened to the core plate and forms a tank internal space together with the core plate.
In the heat exchanger comprising a seal portion disposed between the seal surface of the tank body and the seal surface of the core plate to prevent leakage of the fluid,
The seal portion is a liquid or gel sealant applied to the tank body, which is cured after the application, and is elastically deformed between the seal surface of the tank body and the seal surface of the core plate. A heat exchanger characterized by sealing. Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a core plate to which the tube is joined, and a tank body that is fastened to the core plate and forms a tank internal space together with the core plate.
In the heat exchanger comprising a seal portion disposed between the seal surface of the tank body and the seal surface of the core plate to prevent leakage of the fluid,
The seal portion is a liquid or gel sealant applied to the tank body, which is cured simultaneously with the application, and is elastically deformed to form a seal surface of the tank body and a seal surface of the core plate. A heat exchanger characterized by hermetically sealing the gap. Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a core plate to which the tube is joined, and a tank body that is fastened to the core plate and forms a tank internal space together with the core plate.
The tank body is provided with a partition wall for partitioning the space in the tank into a plurality of closed spaces,
In the heat exchanger comprising a seal portion disposed between the seal surface of the tank body and the seal surface of the core plate to prevent leakage of the fluid,
The seal portion is a liquid or gel sealant applied so as to surround the plurality of closed spaces with respect to the tank body, and is cured after the application, and is elastically deformed to seal the tank body seal surface. And a heat exchanger that seals between the sealing surfaces of the core plate. Multiple tubes through which fluid flows;
A fin joined to the outer surface of the tube to facilitate heat exchange;
A header tank disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a core plate to which the tube is joined, and a tank body that is fastened to the core plate and forms a tank internal space together with the core plate.
The tank body is provided with a partition wall that partitions the tank space into a plurality of closed spaces,
In the heat exchanger comprising a seal portion disposed between the seal surface of the tank body and the seal surface of the core plate to prevent leakage of the fluid,
The seal portion is a liquid or gel seal material applied to the tank body so as to surround the plurality of closed spaces, and is cured simultaneously with the application, and is elastically deformed to seal the tank body. A heat exchanger characterized by sealing between a surface and a sealing surface of the core plate. The heat exchange according to any one of claims 17 to 19, wherein the sealing material is applied on the opposite side of the sealing surface of the tank body so that the cross-sectional shape of the sealing material is a convex shape. vessel. The method for manufacturing a heat exchanger according to claim 21, wherein the sealing material is applied so as to have a substantially semicircular cross section as the convex shape. The heat exchanger according to any one of claims 17 to 22, wherein the sealing material is applied so as to fill the unevenness on a sealing surface having unevenness in the tank body. The heat exchanger according to any one of claims 17 to 22, wherein the sealing material is applied so as to fill the groove with respect to a sealing surface having a groove in the tank body. 23. The sealant according to any one of claims 17 to 22, wherein the sealing material is applied so as to fill the semicircular groove section with respect to a seal surface having a semicircular groove section in the tank body. The described heat exchanger. The heat exchanger according to any one of claims 17 to 25, wherein the core plate and the tank body are fastened by caulking. 27. The heat exchanger according to any one of claims 17 to 26, wherein the core plate and the tank body are fastened by crimping caulking claws of the core plate to the tank body. . 28. The heat exchanger according to claim 27, wherein at least one lap portion where the application start position and the application end position of the sealing material overlap each other is formed on the tank body. 29. The heat exchanger according to claim 28, wherein the sealing material is applied to the sealing surface so as to form the wrap portion in a straight portion extending linearly of the sealing surface of the tank body. Manufacturing method. 30. The heat exchanger according to claim 28 or 29, wherein the caulking claw is caulked in a state of overlapping the wrap portion.

Images