JP2008261550A - Heat exchanger and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a decline in durability of a radiator 1 itself. <P>SOLUTION: In the radiator 1, a side wall part 52a (52b) of a core plate 50a has a groove part 520a (520b) serving as a bending base point. Due to this structure, it is unnecessary to make the strength of a bending part 521 of the core plate 50a fragile. Thus, even when the internal pressure in a tank inner space 50c of a header tank 5a (5b) is increased so as to apply pressure in a direction intersecting with a tube longitudinal direction to a tank main body 50b and so as to apply stress from an end part corner part 600a of the tank main body 50b to the bending part 521 of the core plate 50a indicated by the arrow Yb, decline in the strength of the bending part 521 can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger having a header tank and a manufacturing method thereof.

  Conventionally, a heat exchanger includes a plurality of tubes and a header tank communicating with each of the plurality of tubes. The header tank is formed by joining a tank body formed in a semi-cylindrical shape and a plurality of tubes. And a core plate fitted to the tank body (see, for example, Patent Document 1).

  In this, the core plate includes a bottom surface portion that is disposed so as to cover the internal space of the tank body, a side wall portion that protrudes from the bottom surface portion and is disposed outside the end portion of the bottom surface portion of the tank body, and the side wall. And a claw portion that is bent from the portion and fits the core plate and the tank body.

Here, a portion of the core plate that is bent between the side wall portion and the claw portion (hereinafter referred to as a bent portion) is thinner than the other portions in comparison with the thickness. For this reason, the bending rigidity of a nail | claw part becomes small and a nail | claw part can be bent with comparatively small force.
JP 2002-286396 A

  When the present inventor diligently studied the above-described heat exchanger, when the internal pressure of the header tank increases, as shown by the arrow Ya in FIG. 15, the direction in which the tank body 50b is inclined in the tube longitudinal direction. Pressure is applied. For this reason, stress is applied to the bent portion 521 of the core plate 50a from the end corner portion 600a of the tank body 50b as indicated by an arrow Yb in FIG.

  Therefore, when the internal pressure of the header tank repeatedly increases, stress is repeatedly applied from the end corner portion 600a of the tank body 50b to the bent portion 521 of the core plate 50a. For this reason, as described above, if the thickness of the bent portion 521 is reduced, the strength of the bent portion 521 is reduced, leading to a decrease in the durability of the core plate and a decrease in the durability of the heat exchanger itself. .

  An object of this invention is to provide the heat exchanger which suppressed the fall of durability in view of the said point.

  In order to achieve the above object, in the present invention, a plurality of tubes (2) through which fluid flows, and header tanks (5a, 5b) arranged in the longitudinal direction of the tubes and communicating with each of the plurality of tubes, The header tank includes a tank body (50b) formed in a semi-cylindrical shape, and a core plate (50a) to which a plurality of tubes are joined and fixed to the tank body. The bottom plate (51) formed so as to cover the internal space of the tank main body, the side wall (52a, 52b) disposed outside the tank main body, and the core plate are fixed to the tank main body. A heat exchanger manufacturing method comprising a claw portion (53a, 53b) that is formed so as to be bent with respect to the side wall portion and that locks the tank main body. An arrangement step (S130) of arranging the tank main body with respect to the core plate so as to cover the internal space of the main body, and a claw portion side of the side wall portion after the arrangement step, with a bending base point provided on the side wall portion as a base point And a fixing step (S140) of fixing the tank main body and the core plate by locking with the claw portion by bending.

  Therefore, since the claw part side of the side wall part is bent with the bending base point provided on the side wall part as a base point, it is not necessary to make the bent part (the part between the claw part and the side wall part) of the core plate weak. For this reason, even if the internal pressure of a header tank rises and force is applied to the bending part of a core plate from a tank main body, it can suppress that the intensity | strength of a bending part falls. For this reason, the fall of durability of a core plate and by extension, the fall of durability of heat exchanger itself can be controlled.

  The present invention includes a seal coating curing step (S120) of applying and curing a liquid or gel-like sealing material to one of the tank body and the core plate before the arranging step, The tank body is placed in a state in which the core plate and the tank body are in close contact with each other due to the adhesiveness of the cured sealing material and elastically deformed to seal between the core plate and the tank body. The second feature is that it is arranged with respect to the core plate.

  Therefore, when the claw part side of the side wall part is bent, even if a load is applied to the sealing material from the claw part, the sealing material can be hardly twisted or the position of the sealing material can hardly be shifted.

  In the present invention, the third feature is that the bending base point is weaker in strength than other portions other than the bending base point.

  Therefore, the nail | claw part side of a side wall part can be bent easily. Specifically, the bending base point may be configured by arranging a plurality of holes, and the bending base point may be configured by a groove.

  In the present invention, the bottom surface portion of the core plate is a plate-like member formed in a rectangular shape, and the side wall portion protrudes from the bottom surface portion toward the tank body and extends in the longitudinal direction of the bottom surface portion. The claw part is formed so as to extend in the longitudinal direction of the bottom surface part of the bottom surface part.

  Therefore, since the strength of the claw portion itself can be increased, even when the internal pressure of the internal space of the tank body rises and a force is applied to the claw portion, the claw portion is hardly deformed.

  The fifth feature of the present invention is that the tank body has a contact portion (600) that comes into contact with the bending base point of the core plate from the inside.

  Therefore, since the nail | claw part side of a side wall part can be bend | folded by using a contact part as a fulcrum, the nail | claw part side of a side wall part can be bent easily.

  In the present invention, the contact portion of the tank main body protrudes toward the bending base point of the core plate, and a part of the contact portion protrudes toward the bottom surface of the core plate. This is the sixth feature.

  Therefore, the contact portion of the tank body can be reliably brought into contact with the bending base point of the core plate.

  In the present invention, the bottom surface of the core plate is provided with a plurality of holes (56) into which a plurality of tubes are respectively fitted, and at the bottom of the core plate, between the two holes, A seventh feature is that a projection (71) formed so as to protrude in the longitudinal direction of the tube and on the opposite side of the tank body is provided.

  Therefore, the strength of the bottom surface portion of the core plate can be increased. Therefore, when the tank body and the core plate are fixed by the locking by the claw portion, even if a force is applied from the claw portion to the bottom surface portion of the core plate, Deformation of the bottom surface of the plate can be suppressed.

  The eighth feature of the present invention is that the width of the protrusion is longer than the width of the tube.

  Therefore, the strength of the bottom surface portion of the core plate can be further increased. Here, the “width dimension of the protrusion and the tube” is a dimension in a direction perpendicular to the longitudinal direction of the tube.

  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 an automobile. 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 and cools engine cooling water with air sucked from (or blown out) 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 brazing 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 fins 3 according to this embodiment, corrugated fins that are roller-shaped in a wave shape as viewed from the direction of flow with the cooling air are 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 end portion of the core portion 4, 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 tanks 5a and 5b are located at both ends in the longitudinal direction of the tube 2 and extend in a direction orthogonal to the longitudinal direction of the tube 2 to communicate with each tube 2. In this embodiment, the header tank 5a is an engine The header tank 5b collects the engine cooling water cooled (ie, heat exchanged) by the core portion 4 from each tube 2 and supplies it to the engine. It is something to return.

  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 2′-2 ′ of FIG. 1, FIG. 3 is a perspective view showing an intermediate portion 3 ′ (and a space inside the tank) of the header tank 5a in FIG. 1, and FIG. FIG. 5 is an enlarged perspective view of the end 5 ′ of the header tank 5a of FIG.

  As shown in FIG. 2 (or FIG. 3), the header tank 5a has a core plate 50a and a tank body 50b that forms a tank internal space 50c together with the core plate 50a.

  The tank main body 50b is made of a resin material, and as shown in FIG. 3, the tank main body 50b forms a tank inner space 50c and is formed in a semi-cylindrical shape extending in the direction in which the tubes 2 are arranged. As shown in FIG. 5, side wall portions 500 are provided at both end portions in the longitudinal direction of the tank body 50b.

  In addition, as shown in FIG. 2, a protruding end 600 is formed in the tube longitudinal direction of the tank body 50b, and the protruding end 600 is perpendicular to the tube longitudinal direction (ie, It is formed in an annular shape so as to protrude in the tank longitudinal direction and the tank short direction and surround the tank internal space 50c.

  In other words, the protruding end portion 600 protrudes from the inside with respect to the groove portion 520a (520b) of the side wall portion 52a (52b) of the core plate 50a, and a part of the contact portion is a bottom surface portion of the core plate 50a. It protrudes toward 51 and is formed so as to come into contact with the groove 520a (520b) of the side wall 52a (52b) from the inside.

  The axial direction of the tank main body 50b coincides with the arrangement direction of the tubes 2 described later, and hereinafter, the axial direction of the tank main body 50b is simply referred to as a tank longitudinal direction. A direction perpendicular to the longitudinal direction of the tube 2 and perpendicular to the longitudinal direction of the tank is referred to as a tank short direction.

  The core plate 50a is made of an aluminum alloy, and the core plate 50a includes a bottom surface portion 51 and side wall portions 52a and 52b as shown in FIG. The bottom surface portion 51 is a rectangular plate member extending in the tank longitudinal direction, and is disposed so as to cover the tank internal space 50c of the tank body 50b.

  The side wall parts 52a and 52b are respectively arranged on both sides in the tank lateral direction with respect to the bottom surface part 51, and the side wall parts 52a are arranged on the outer side of the left protruding end part 600 in FIG. The side wall 52b is disposed outside the right protruding end 600 in FIG. 2 of the tank body 50b. The side wall portions 52a and 52b each extend in the tube longitudinal direction along the outer wall of the protruding end portion 600.

  The side wall portions 52a and 52b are provided with groove portions 520a and 520b, and the groove portions 520a and 520b are formed in the tank longitudinal direction. The groove portions 520a and 520b are weaker than the other portions of the side wall portions 52a and 52b, and the groove portions 520a and 520b have bending base points when the side wall portions 52a and 52b are bent, as will be described later. Constitute.

  The core plate 50a is provided with fitting claws 53a and 53b, and the fitting claws 53a and 53b are formed so as to protrude from the side walls 52a and 52b to the tank body 50b side. Here, the fitting claw portion 53a (53b) is formed so as to extend over the tank longitudinal direction along the side wall portion 52a (52b).

  Further, the core plate 50a includes side wall portions 52c and 52d and fitting claw portions 53c and 53d as shown in FIG. 5 (the side wall portion 52d and the fitting claw portion 53d are omitted). .

  The side wall portion 52 c is disposed on one end side in the tank longitudinal direction with respect to the bottom surface portion 51, and the side wall portion 52 d is disposed on the other end side in the tank longitudinal direction with respect to the bottom surface portion 51. The side wall portions 52c and 52d are disposed outside the protruding end portion 600 of the tank body 50b.

  The side wall portions 52c and 52d are formed so as to extend from the bottom surface portion 51 to the tank main body side (specifically, the tube longitudinal direction). The fitting claws 53c and 53d are formed so as to protrude from the side walls 52c and 52d toward the tank body 50b.

  6A is a front view of the core plate 50a alone viewed from the longitudinal direction of the tube 2, FIG. 6B is a right side view of the core plate 50a, and FIG. 7 is 7′-7 ′ in FIG. 5A. A cross-sectional view is shown.

  As shown in FIG. 6A, the bottom surface portion 51 is provided with a plurality of projections 70, and each of the plurality of projections 70 is connected to an in-tank space 50c (FIG. 6) from an annular flat surface portion 57 described later. (A) It is formed so as to protrude toward the front side of the middle sheet. The plurality of protrusions 70 are arranged in the tank longitudinal direction, and each of the plurality of protrusions 70 is provided with a through hole 56. The plurality of through holes 56 are provided for joining the plurality of tubes 2 and the side plates 4a and 4b, as shown in FIGS.

  As shown in FIG. 6A, the bottom surface portion 51 is provided with a plurality of protrusions 71, and the plurality of protrusions 71 are respectively disposed between the two protrusions 70. Each of the plurality of protrusions 71 is formed so as to protrude from an annular flat portion 57 described later to the side opposite to the tank internal space 50c (that is, the header tank 5b side) with respect to the tube longitudinal direction.

  Here, the tank width direction dimension W2 (see FIG. 11) of the plurality of protrusions 71 is set to be longer than the tank width direction dimension W1 of the tube 2, respectively. The plurality of protrusions 71 and the plurality of protrusions 70 are each formed by pressing.

  The bottom surface portion 51 is provided with an annular flat surface portion (seal surface) 57, and the annular flat surface portion 57 is annular so as to surround a plurality of through holes 56 as indicated by a chain line arrow E in FIG. It is formed. The plate material constituting the core plate 50a uses a clad material in which the surface into which the tube is inserted is coated with the brazing material, and the plate material constituting the side plates 4a and 4b is coated with the brazing material on the surface in contact with the fins 3. The clad material is used.

  The sealing material 54 is elastically deformed and sandwiched between the annular flat surface portion 57 of the bottom surface portion 51 of the core plate 50a and the protruding end portion 600 of the tank body 50b. The space between the annular flat surface portion 57 and the projecting end portion 600 is sealed while being in close contact with the flat surface portion 57. For this reason, the engine coolant is prevented from leaking from the tank internal space 50c.

  In the present embodiment, the sealing material 54 is obtained by curing a liquid or gel sealing material. As the sealing material, for example, an acrylic resin that is cured by ultraviolet rays is used. In particular, the sealing material 54 is preferably a resin that is less deteriorated than the antifreeze. 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, the manufacturing method of the radiator 1 which concerns on this embodiment is demonstrated with reference to FIGS. FIG. 8 shows the flow of the manufacturing process of the radiator 1.

  First, a plurality of tubes 2, a core plate 50a, fins 3, and side plates 4a and 4b are prepared. At this time, the core plate 50a is prepared in a state where the claw portions 525a and 525b of the side walls 52a and 52b are spread outward.

  The core part 4 is assembled (S100). Specifically, 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 core hole 4 is inserted into each through hole 56 of the core plate 50a of the header tank 5a. The tube 2 and the side plates 4a and 4b are inserted.

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

  Next, each tube 2 and the side plates 4a and 4b are inserted into the respective through holes 56 (see FIG. 6) 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. 9, the tube 2, the fin 3, the side plates 4a and 4b, and the core plates 50a of the header tanks 5a and 5b are integrally joined by brazing (S110).

  Next, as shown in FIG. 10, a liquid (or gel-like) sealing material is applied to the annular flat surface portion 57 of the core plate 50a, and the applied gel-like sealing material 54 is irradiated with ultraviolet rays. And cured (S120).

  Proceeding to the next tank arrangement step (S130), the tank main body 50b is arranged on the core plate 50a, and the inner space 50c of the tank main body 50b is covered by the bottom surface portion 51 of the core plate 50a.

  At this time, the claw part side 525a (525b) side of the side wall parts 52a, 52b of the core plate 50a is spread outward as shown in FIG. 9, and the fitting claw parts 53a, 53b are respectively The side walls 52a and 52b are bent at an angle of about 90 °.

  Next, the process proceeds to a bending step (S140), where the side wall portions 52a and 52b are pressed against the claw portion side 525a (525b) side as shown by the arrow F in FIG. 10 and the groove portions 520a and 520b are used as bending base points. The claw portion side 525a (525b) side of 52a and 52b is bent to the tank body 50b side. That is, the groove part 520a (520b) is plastically deformed, and the claw part side 525a (525b) side is bent to the tank body 50b side.

  Along with this, the side walls 52a and 52b have a shape extending in the direction perpendicular to the bottom surface 51 (that is, the longitudinal direction of the tube), and the claw portions 53a and 53b of the side walls 52a and 52b The protruding end 600 is locked.

  That is, as shown in FIG. 11, the tank body 50b and the core plate 50a are caulked and fixed by sandwiching the protruding end portion 600 and the sealing material 54 between the claw portion 53a (53b) and the bottom surface portion 51.

  On the other hand, the side walls 52c and 52d have a shape extending in advance in the direction orthogonal to the bottom surface 51 (that is, the tube longitudinal direction), and the fitting claws 53c and 53d are connected to the side walls 52c and 52d. Are bent toward the tank body 50b. Thereby, the protruding end portion 600 of the tank body 50b is locked by the fitting claws 53c and 53d.

  That is, the tank main body 50b and the core plate 50a are caulked and fixed by sandwiching the protruding end portion 600 and the sealing material 54 between the claw portion 53c (53d) and the bottom surface portion 51.

  In the present embodiment described above, the groove portion 520a (520b) is provided in the side wall portion 52a (52b) of the core plate 50a, and the groove portion 520a (520b) is used as a bending base point. Therefore, the strength of the bent portion 521 of the core plate 50a is increased. There is no need to make it vulnerable.

  Accordingly, the internal pressure of the tank internal space 50c of the header tank 5a (5b) is increased, and pressure is applied to the tank body 50b in the direction intersecting the tube longitudinal direction as shown by the arrow Ya in FIG. As described above, even if stress is applied to the bent portion 521 of the core plate 50a from the end corner portion 600a of the tank main body 50b, it is possible to suppress the strength of the bent portion 521 from decreasing. For this reason, the fall of durability of core plate 50a and by extension, the fall of durability of radiator 1 itself can be controlled.

  In the present embodiment, the groove portion 520a (520b) is provided in the side wall portion 52a (52b) of the core plate 50a, and the groove portion 520a (520b) is used as a bending base point. Therefore, the claw portion side 525a of the side wall portion 52a (52b) The (525b) side can be easily bent.

  Further, in the present embodiment, the projecting end portion 600 is formed so as to come into contact with the groove portion 520a (520b) of the side wall portion 52a (52b) of the core plate 50a from the inside. Therefore, when the claw portion side 525a (525b) side of the side wall portion 52a (52b) is bent, the protruding end portion 600 contacts the inside of the groove portion 520a (520b), and thus the claw portion of the side wall portion 52a (52b). The side 525a (525b) side can be reliably bent.

  Here, the protruding end portion 600 protrudes toward the side wall portion 52a (52b) of the core plate 50a, and a part of the contact portion is formed to protrude toward the bottom surface portion of the core plate. Therefore, the projecting end portion 600 easily comes into contact with the groove portion 520a (520b) of the side wall portion 52a (52b) of the core plate 50a from the inside.

  Further, when the claw portion side 525a (525b) side of the side wall portion 52a (52b) is bent, a load is applied to the bottom surface portion 51 of the core plate 50a, and if the bottom surface portion 51 is deformed and twisted, a load is applied to the tube 2. There is a possibility of deformation.

  On the other hand, in the present embodiment, since the plurality of protrusions 71 are provided on the bottom surface portion 51 to increase the bending rigidity of the bottom surface portion 51, the bottom surface portion 51 is deformed even when a load is applied to the bottom surface portion 51. It becomes difficult to do.

  In particular, in this embodiment, since the width dimension W2 of the protrusion 71 is set longer than the width dimension W1 of the tube 2, the bending rigidity of the bottom surface part 51 can be further increased.

  In the present embodiment, the width dimension of the protrusion 71 and the tube 2 is a dimension in a direction perpendicular to the tube longitudinal direction and perpendicular to the tank longitudinal direction (that is, the tank lateral direction dimension). is there.

  In the present embodiment, the sealing material 54 is obtained by curing a liquid or gel sealing material, and the sealing material 54 is in close contact with the annular flat surface portion 57 of the bottom surface portion 51 of the core plate 50a.

  Therefore, when the claw portion side 525a (525b) side of the side wall portion 52a (52b) is bent, even if a load is applied to the sealing material 54 from the fitting claw portions 53a and 53b via the protruding end portion 600, the seal It is possible to make it difficult for the material 54 to be twisted and for the position of the sealing material 54 to be displaced. For this reason, it is possible to prevent leakage of engine cooling water.

  In the present embodiment, the fitting claws 53a and 53b are formed so as to extend along the side wall 52a (52b) in the tank longitudinal direction. Therefore, since the strength of the fitting claws 53a and 53b itself can be increased, even if the internal pressure of the internal space 50c of the tank body 50b rises and a force is applied to the fitting claws 53a and 53b, the fitting claws The parts 53a and 53b are not easily deformed.

(Second Embodiment)
In the second embodiment, as shown in FIG. 12, the core plate 50a is provided with a groove portion 800 formed so as to accommodate the sealing material 54 with the annular flat surface portion 57 as a bottom surface.

  An outline of assembly in this case will be described.

  First, as shown in FIG. 13, the sealing material 54 is arranged on the annular flat surface portion 57 of the core plate 50a. A rubber material is used as the sealing material 54 of the second embodiment.

  Next, as shown in FIG. 14, the tank body 50b is disposed on the core plate 50a, and the inner space 50c of the tank body 50b is covered with the bottom surface portion 51 of the core plate 50a.

  At this time, the claw part side 525a (525b) side of the side wall parts 52a and 52b of the core plate 50a is spread outward, and the fitting claw parts 53a and 53b are respectively in contact with the side wall parts 52a and 52b. And bent at an angle of about 90 °.

  Next, the side wall portions 52a and 52b are pressed against the claw portion side 525a (525b) side as shown by the arrow Fa in FIG. 14, and the claw portion side 525a of the side wall portions 52a and 52b with the groove portions 520a and 520b as bending base points. The (525b) side is bent to the tank body 50b side.

  Accordingly, the protruding end portion 600 of the tank body 50b is locked by the claw portions 53a and 53b of the side wall portions 52a and 52b. That is, the tank main body 50b and the core plate 50a are caulked and fixed by sandwiching the protruding end portion 600 and the sealing material 54 between the claw portion 53a (53b) and the bottom surface portion 51.

(Other embodiments)
In the above-described first embodiment, the example in which the groove portion 520a (520b) is provided as the bending base point on the side wall portion 52a (52b) of the core plate 50a has been described. 520a (520b) may be provided.

  In the first embodiment described above, an example in which the groove portion 520a (520b) is provided as a bending base point on the side wall portion 52a (52b) of the core plate 50a to weaken the strength is not limited thereto. It is not necessary to weaken the strength as a bending base point of the side wall 52a (52b).

  In the first embodiment described above, the example in which the groove portion 520a (520b) is provided as the bending base point on the side wall portion 52a (52b) of the core plate 50a has been described, but the present invention is not limited thereto, and the side wall portion 52a (52b) of the core plate 50a. ) May be configured to have a single hole or a plurality of holes. Moreover, you may make it comprise a some groove part side by side.

  In the first embodiment described above, the example in which the sealing material is applied to the annular flat surface portion 57 of the core plate 50a has been described. Instead, the sealing material is applied to the protruding end portion 600 of the tank body 50b. May be applied.

  In each of the above-described embodiments, the example in which the sealing material 54 is cured after being applied to the core plate 50a has been described. Instead, the sealing material 54 is cured simultaneously with the application to the core plate 50a. Also good.

  In this case, while applying the sealing material 54 to the core plate 50a, the sealing material 54 is irradiated with ultraviolet rays.

  The sealing material 54 may be applied to the core plate 50a at the same time as applying the heat to the sealing material 54 to be cured.

  In each of the above-described embodiments, the example in which the liquid or gel-like sealing material 54 is applied to the core plate 50a in the heat exchanger that brazes the plurality of tubes 2 to the core plate 50a has been described. Not limited to this, in a heat exchanger for joining a plurality of tubes 2 to the core plate 50a by a method other than brazing (for example, thermosetting resin), a liquid or gel-like sealing material 54 is provided on the sealing surface 51c of the core plate 50a. You may make it apply | coat.

  In each of the above-described embodiments, an example in which the heat exchanger according to the present invention is applied to a radiator has been described. If present, the present invention may be applied to various heat exchangers such as an evaporator and a heater core unit. In this case, fluid other than engine coolant may be used as the fluid.

It is a figure which shows the structure of 1st Embodiment of the radiator which concerns on this invention. It is 2'-2 'sectional drawing of FIG. FIG. 3 is an enlarged perspective view of a 3 ′ portion in FIG. 1. FIG. 4 is an enlarged view of a 4 ′ portion in FIG. 3. It is an expansion perspective view of 5 'part of FIG. It is a top view of the core plate of FIG. It is 7'-7 'sectional drawing in FIG. It is a flowchart which shows the manufacturing process of the radiator of FIG. It is a figure which shows the assembly | attachment procedure of the header tank of FIG. It is a figure which shows the assembly | attachment procedure of the header tank of FIG. It is a figure which shows the assembly | attachment procedure of the header tank of FIG. It is a figure which shows the structure of 2nd Embodiment of the radiator which concerns on this invention. It is a figure which shows the assembly | attachment procedure of the header tank of the above-mentioned 2nd Embodiment. It is a figure which shows the assembly | attachment procedure of the header tank of the above-mentioned 2nd Embodiment. It is a figure for demonstrating the problem of the header tank of the conventional radiator.

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 (14)

A plurality of tubes (2) through which fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape, and a core plate (50a) to which the plurality of tubes are joined and fixed to the tank body,
The core plate includes a bottom surface portion (51) formed so as to cover the internal space of the tank body, and side wall portions (52a, 52b) disposed outside the tank body,
A heat provided with claw portions (53a, 53b) formed to be bent with respect to the side wall portion before the core plate is fixed to the tank main body, and for locking the tank main body. A method of manufacturing an exchanger,
An arrangement step (S130) of arranging the tank body with respect to the core plate so as to cover the internal space of the tank body with the bottom surface portion;
After this arrangement step, the tank body and the core plate are fixed by being locked by the claw part by bending the claw part side of the side wall part from the bending base point provided on the side wall part. Step (S140);
A method for producing a heat exchanger, comprising: Before the placing step, there is a seal coating curing step (S120) for applying and curing a liquid or gel-like sealing material to one of the tank body and the core plate,
In the state in which the arrangement step is performed in a state where the core plate and the tank main body are hermetically sealed by tightly contacting one of the core plate and the tank main body due to the adhesiveness of the cured sealing material, The method for manufacturing a heat exchanger according to claim 1, wherein a tank body is disposed with respect to the core plate. A plurality of tubes (2) through which fluid flows;
A header tank (5a, 5b) disposed in the longitudinal direction of the tube and communicating with each of the plurality of tubes;
The header tank includes a tank body (50b) formed in a semi-cylindrical shape, and a core plate (50a) to which the plurality of tubes are joined and fitted to the tank body,
The core plate includes a bottom surface portion (51) formed so as to cover the internal space of the tank body, and side wall portions (52a, 52b) disposed outside the tank body,
A heat exchanger comprising claw portions (53a, 53b) formed so as to be bent with respect to the side wall portion before the core plate is fixed to the tank body, and locking the tank body. Because
The tank main body and the core plate are fixed by locking by the claw portion by bending the claw portion side of the side wall portion to the tank main body side with the bending base point provided on the side wall portion as a base point. It is comprised, The heat exchanger characterized by the above-mentioned. The heat exchanger according to claim 3, wherein the bending base point provided on the side wall portion is weaker in strength than other portions other than the bending base point. The heat exchanger according to claim 4, wherein the bending base point is configured by arranging a plurality of holes. The heat exchanger according to claim 4, wherein the bending base point is configured by a groove. The bottom portion of the core plate is a plate-like member formed in a rectangular shape,
The side wall portion is formed so as to protrude from the bottom surface portion to the tank body side and extend over the longitudinal direction of the bottom surface portion,
The heat exchanger according to any one of claims 3 to 6, wherein the claw portion is formed to extend in a longitudinal direction of the bottom surface portion. The heat exchanger according to any one of claims 3 to 6, wherein the tank body has a contact portion (600) that contacts the bending base point of the core plate from the inside. A contact portion of the tank body protrudes toward the bending base point of the core plate, and a part of the contact portion of the tank body protrudes toward a bottom surface portion of the core plate. The heat exchanger according to claim 8. The bottom surface of the core plate is provided with a plurality of holes (56) into which the plurality of tubes are respectively fitted.
Protrusions (71) formed so as to protrude in the longitudinal direction of the tube and on the opposite side with respect to the tank body are provided in the bottom surface of the core plate between the two holes, respectively. The heat exchanger according to claim 3, wherein the heat exchanger is a heat exchanger. The heat exchanger according to claim 10, wherein a width dimension of the protrusion is longer than a width dimension of the tube. In the tank body, the bottom surface side end (600) on the bottom surface side of the core plate is formed so as to surround the internal space of the tank body,
The bottom surface of the core plate has a sealing surface (57) provided so as to surround the plurality of tubes,
A sealing material (54) which elastically deforms and seals between the bottom surface side end and the sealing surface between the bottom surface side end of the tank body and the bottom surface sealing surface of the core plate. The heat exchanger according to claim 3, wherein the heat exchanger is disposed. 2. The sealing material according to claim 1, wherein a liquid sealing material is applied to one of the bottom surface side end portion of the tank body and the sealing surface of the core plate and cured. The heat exchanger according to any one of 3 to 12. The heat exchanger according to any one of claims 3 to 13, wherein the core plate is provided with a groove (800) formed so as to receive the sealing material with the sealing surface as a bottom surface. .

Images