JP2006170525A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange capable of easily reducing stress generated in a tube in regard to a heat exchanger with a tank comprising two bent metal plate materials. <P>SOLUTION: The heat exchanger has the tank 140 extending in a laminated direction of a plurality of tubes 110, connected to longitudinal ends of the tubes 110, and with an internal space 145 communicated with tube 110 interiors. The tank 140 is formed by mutually soldering a first plate member 140A formed by bending the metal plate material and provided with a core plate part 141 connected to the tubes, and mutually facing side wall parts 142, and a second plate member 140B formed by bending the metal plate material, and provided with an opposing wall part 143 facing the core plate part 141, and mutually facing cap parts 144. A cross sectional shape of the core plate part 141 orthogonal to the laminated direction protrudes in a longitudinal direction of the tube 110, and toward an outer side the tank 140. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanger, and more particularly, to a heat exchanger made of two metal plates in which a tank communicating with a plurality of tubes is bent.

  As a conventional heat exchanger, for example, the one shown in Patent Document 1 is known. The tank of this heat exchanger is formed of a tank body (first member) bent from a metal plate material and a tube plate (second member). The tank body is formed such that a pair of side wall portions are opposed to each other through the groove bottom portion, and the tube plate is formed by providing closed end portions bent at substantially right angles at both ends in the longitudinal direction. .

A groove bottom latching portion folded back to the inner surface side is provided at both longitudinal ends of the groove bottom portion of the tank body, and a side wall latching portion folded back to the inner surface side is provided at the leading edge of the pair of side wall portions. It has been. And the tip of the closed end of the tube plate is locked to the groove bottom locking part, and both side edges of the tube plate are locked to the side wall locking part, and the tank body and the tube plate are brazed. Yes. A large number of tube insertion holes are provided in the tube plate, and a large number of tubes are inserted and connected thereto by brazing. As a result, it is possible to provide a heat exchanger (tank) that is easy to assemble, has high reliability in the joint, and is low in cost. It is described that the tube insertion hole may be provided on the first member side.
JP 2001-12891 A

  However, since the tank of the heat exchanger uses a simple bending process of a metal plate material, it forms an elongated rectangular parallelepiped (six surfaces are flat). Further, when the second member is a tube plate, the closed end is formed by bending, and therefore the surface to which the tube is brazed is limited to a simple flat surface.

  Here, in the heat exchanger, for example, a difference in thermal expansion between the side plate and the tube as a strength member disposed outside the many tubes (outside in the tube stacking direction) or a temperature difference between the internal fluids. Stress is generated in the tube (brazed portion with the tube plate) due to a difference in thermal expansion between the tubes due to (temperature variation).

  If the surface to which the tube is brazed is a flat surface as described above, stress tends to concentrate on the longitudinal end portion side of the flat tube cross section. There is a risk of leakage.

  In view of the above problems, an object of the present invention is to provide a heat exchanger that can easily reduce stress generated in a tube in a case where a tank is made of two bent metal plates.

  In order to achieve the above object, the present invention employs the following technical means.

  In the first aspect of the present invention, a plurality of stacked tubes (110) and a plurality of tubes (110) extending in the stacking direction are connected to the longitudinal ends of the tubes (110), and the internal space (145). In the heat exchanger having a tank (140) communicating with the inside of the tube (110), the tank (140) includes a core plate portion (141) to which the tube (110) is connected by bending a metal plate material, and A first plate member (140A) provided with opposing side wall portions (142A) extending so as to sandwich the internal space (145) from two sides along the stacking direction of the core plate portion (141), and the metal plate material is bent. The internal wall (145) and the opposing wall (143) facing the core plate (141) across the internal space (145) and the two sides on the stacking direction end side of the opposing wall (143) The second plate member (140B) provided with a cap portion (144) extending so as to sandwich (145) is brazed to each other, and is orthogonal to the stacking direction of the core plate portion (141). The cross-sectional shape is formed so as to protrude in the longitudinal direction of the tube (110) and outside the tank (140).

  Thereby, compared with the case where a core plate part (141) is a plane, the brazing area of a tube (110) and a core plate part (141) can be increased, and thermal expansion of a tube (110) is carried out. Since stress concentration caused by the acting force (F) accompanying the difference can be eliminated, the stress generated in the tube (110) can be reduced.

  In addition, in the core plate part (141), the cross-sectional shape orthogonal to the stacking direction of the tubes (110) protrudes outside the tank (140) in the longitudinal direction of the tubes (110). The tank (140) can be formed only by aligning the outline line of the cap part (144) to be the projecting part, and the bending process of both plate members (140A, 140B) is not complicated.

  The invention according to claim 2 is characterized in that the second plate member (140B) is provided with at least one rib (143a, 143b).

  Accordingly, the rigidity of the second plate member (140B) can be increased, and deformation when the second plate member (140B) is assembled to the first plate member (140A) to form the tank (140) can be prevented. Therefore, the clearance gap between both plate members (140A, 140B) can be reduced, and the stable brazing can be performed.

  In addition, after being formed as the tank (140), the ribs (143a, 143b) serve as reinforcing ribs in the second plate member (140B), so that the pressure resistance strength of the tank (140) can be improved. .

  The ribs (143a, 143b) are preferably projected toward the internal space (145) as in the third aspect of the invention. As a result, it is possible to prevent the outline of the tank (140) from becoming large, so that mountability is not deteriorated.

  The invention according to claim 4 is characterized in that the side wall part (142) is provided with a joining groove part (142a) into which the end part (144a) side of the opposing cap part (144) is inserted.

  As a result, since the second plate member (140B) can be assembled to the first plate member (140A) using the joining groove portion (142a) as a guide, the assemblability of both plate members (140A, 140B) is improved. it can.

  Further, when the two plate members (140A, 140B) are brazed, the joining groove (142a) serves as a brazing reservoir, so that the brazing between the side wall (142) and the cap (144) can be improved. it can.

  In the invention according to claim 5, the side wall part (142) is provided with the first slit part (142b) into which the end part (144a) side of the opposing cap part (144) is inserted, and the end part (144a). Is characterized by projecting from the outer surface of the side wall (142).

  As a result, the second slit member (140B) can be assembled to the first plate member (140A) using the first slit portion (142b) as a guide, so that the assemblability of both plate members (140A, 140B) can be increased. Can be improved.

  Further, when the two plate members (140A, 140B) are brazed, the side wall portion (142) and the cap portion (144) intersect with each other, and the two plate members (140A, 140B) are mutually connected as compared with the case of butting. The number of contact points can be increased. Therefore, since the fillet at the time of brazing becomes easy to be formed, the brazing property between the side wall portion (142) and the cap portion (144) can be improved.

  In the invention according to claim 6, the second slit portion (144b) into which the opposite wall portion (143) side of the side wall portion (142) is inserted is provided on the side wall portion (142) side of the cap portion (144). It is characterized by that.

  Thereby, since the position of the side wall part (142) can be restrained with respect to the cap part (144), the clearance gap between a side wall part (142) and a cap part (144) is reduced, and both (142, 144). It is possible to improve the brazing property.

  In the invention according to claim 7, the first bent portion (144c) is bent at the outer peripheral edge of the cap portion (144) so as to be in contact with at least one of the core plate portion (141) and the side wall portion (142). ) Is formed.

  As a result, the first bent portion (144c) serves as a soldering allowance for the core plate portion (141) and the side wall portion (142), and the brazing area can be increased. Therefore, the core plate portion (141) and the side wall portion ( 142) and the cap part (144) can be improved in brazing.

  According to the eighth aspect of the present invention, the second bent portion (143c) bent so as to contact the side wall portion (142) is formed at the end portion on the side wall portion (142) side of the opposing wall portion (143). It is characterized by that.

  As a result, the second bent portion (143c) becomes a brazing allowance for the side wall portion (142), and the brazing area can be increased, so that the brazing property between the side wall portion (142) and the opposing wall portion (143) is achieved. Can be improved.

  In the invention according to claim 9, the core plate portion (141) is provided with a through hole (141b) through which at least a part of the end portion (144d) of the facing cap portion (144) passes. It is said.

  Thereby, compared with the case where a core plate part (141) and a cap part (144) are faced together, since the clearance gap between both (141, 144) can be reduced, a core plate part (141) and a cap part It is possible to improve the brazing property with (144).

  In the invention according to the ninth aspect, as in the invention according to the tenth aspect, it is preferable to form a burring (141c) in the through hole (141b), and to increase the brazing area. The brazing property between the core plate part (141) and the cap part (144) can be improved.

  In the invention of claim 11, the core plate portion (141) is formed with a window portion (141 d), and the cap portion (144) has a convex shape and a root portion on the core plate portion (141) side. After the protruding portion (144f) is provided on the side and inserted into the window portion (141d), the protruding protrusion (144e) is engaged with the outer surface of the core plate portion (141) by the protruding portion (144f). It is characterized by being formed.

  Accordingly, the core plate portion (141) and the cap portion (144) are simply inserted into the window portion (144d), that is, without applying a large load to the core plate portion (141). Therefore, the brazing between the core plate part (141) and the cap part (144) can be improved.

  In the invention described in claim 12, a concave fitting groove (148) is formed at the end of one of the first plate member (140A) and the second plate member (140B) (140A). On the other end (140B), an engaging claw portion (149) is formed which is fitted in the fitting groove portion (148) and the tip portion engages with the outer surface of one (140A). It is a feature.

  Thereby, the clearance gap between the first plate member (140A) and the second plate member (140B) can be reduced by the fitting groove portion (148) and the engaging claw portion (149). Thus, stable brazing can be ensured.

  In addition, the fitting groove part (148) and the engaging claw part (149) according to the twelfth aspect are the same as the fitting window part (148a) and the fitting convex part (149a) as in the invention according to the thirteenth aspect. Even if it replaces with), the same effect can be acquired.

  Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 is a front view showing the overall structure of the radiator 100, FIG. 2 is a plan view of the first plate member 140A constituting the tank 140, (b) is a front view, and (c) is (b). 3) is a side view from the A direction, FIG. 3 is a plan view of the second plate member 140B constituting the tank 140, (b) is a front view, and (c) is a view from the B direction of (b). 4 is a perspective view showing a method of combining the first plate member 140A and the second plate member 140B. FIG. 5 is a view showing the first plate member 140A and the second plate member 140B assembled and joined together. FIG. 6 is a cross-sectional view showing a brazed portion 150 between the tube 110 and the core plate portion 141.

  1st Embodiment shall be applied to the radiator 100 which cools the cooling water of a vehicle engine as a heat exchanger of this invention. Here, each member (detailed description below) such as the tube 110, the fin 120, the side plate 130, the tank 140 and the like constituting the radiator 100 is made of aluminum or an aluminum alloy, and a contact portion or a fitting portion between the members. Is an aluminum radiator brazed together. In FIG. 1, only a part of the tubes 110 and the fins 120 are illustrated.

  As shown in FIG. 1, the radiator 100 of the present embodiment is a so-called cross flow type in which the tubes 110 are arranged in the horizontal direction, and mainly includes a core portion 101 and a pair of tanks 140.

  The core part 101 is a reinforcing member in which a tube 110 having a flat cross section and fins 120 having a corrugated shape are alternately stacked, and the outermost fin 120 in the stacking direction is further outwardly formed in a U-shaped cross section. The side plate 130 is provided and serves as a portion (heat dissipating part) for cooling the cooling water.

  The tank 140 is an elongated container body and is arranged so that the longitudinal direction thereof is the stacking direction of the tubes 110. The tank 140 forms a pair and is connected to both longitudinal ends of the tube 110 and the side plate 130, and the inside of the tube 110 and the internal space 145 of the tank 140 communicate with each other.

  In addition, an inlet pipe 146 is provided on the upper side of one of the tanks 140 (left side in FIG. 1), and cooling water flows from the inlet pipe 146 into the internal space 145 of the tank 140. Further, an outlet pipe 147 is provided on the lower side of the other tank 140 (on the right side in FIG. 1) so that the cooling water in the internal space 145 of the tank 140 flows out from the outlet pipe 147.

  Each tank 140 includes a first plate member 140A and a second plate member 140B.

  As shown in FIG. 2, the first plate member 140A is formed by bending one metal plate (corresponding to the metal plate material in the present invention), and the plurality of tubes 110 and the side plates 130 are connected. A core plate part 141 having a hole part 141a, and a pair of side wall parts 142 erected from two sides along the longitudinal direction (left-right direction in FIG. 2) of the core plate part 141. As a characteristic part of the present invention, in the core plate part 141, a cross-sectional shape perpendicular to the longitudinal direction (FIG. 2C) is formed so as to protrude outward in the longitudinal direction of the tube 110 and the tank 140. is doing. In this embodiment, the protruding shape is a trapezoidal shape, and the hole 141a is provided so as to cover three sides of the trapezoidal shape.

  A fitting groove portion (hereinafter referred to as a groove portion) 148 formed in a concave shape is formed at the longitudinal direction end portion of the core plate portion 141 and the standing direction end portion of the side wall portion 142 (the upper end portion in FIG. 2B). The engaging claw portion 149 of the second plate member 140B, which will be described later, is fitted.

  The second plate member 140B is formed by bending one metal plate (corresponding to the metal plate material in the present invention) as shown in FIG. The opposing wall part 143 which opposes on both sides of the internal space 145, and a pair of cap parts 144 erected from two sides on the end part side in the longitudinal direction (left and right direction in FIG. 3) of the opposing wall part 142.

  The cap portion 144 is a portion forming a so-called end cap that closes the longitudinal end portion of the elongated container formed by the core plate portion 141, the pair of side wall portions 142, and the opposing wall portion 143.

  The two side portions along the longitudinal direction of the opposing wall portion 143 and the end portion in the standing direction of the cap portion 144 (the lower end portion in FIG. 3B) are groove portions of the first plate member 140A when the tank 140 is used. Engagement claw portions (hereinafter referred to as claw portions) 149 that engage with 148 and engage with the side wall portion 142 and the outer surface of the core plate portion 141 are formed.

  Next, a method for forming the tank 140 will be described. First, as shown in FIG. 4, the tube 110 of the core portion 101 temporarily fixed and the end portion in the longitudinal direction of the side plate 130 are inserted into the hole portion 141a of the first plate member 140A. Then, the second plate member 140B is combined with the first plate member 140A from the upper side in FIG. 4, and the claw portion 149 of the second plate member 140B is fitted into the groove portion 148 of the first plate member 140A. At this time, the outer peripheral end portion (the end surface serving as the plate thickness portion) of the second plate member 140B is all in contact with the inner surface of the first plate member 140A.

  Note that, before assembling the second plate member 140B to the first plate member 140A, the tube opening may be performed in order to bring the longitudinal end of the tube 110 into close contact with the core plate portion 141.

  When the first plate member 140A and the second plate member 140B are combined, as shown in FIG. 5, the front end side portion of the claw portion 149 of the second plate member 140B is bent and engaged with the outer surface of the first plate member 140. The two plate members 140A and 140B are temporarily fixed to each other.

  Then, the assembly of both plate members 140A and 140B (the assembly as the tank 140) and each member constituting the core part 101 are simultaneously heated, and the surface of each member (the surface of the part required for brazing) The radiator 100 having the tank 140 is formed by brazing integrally with a brazing material (for example, clad).

  In the radiator 100 thus formed, the cooling water from the vehicle engine flows through the core portion 101 (tube 110) and is cooled by heat exchange with the cooling air flowing outside the core portion 101.

  By the way, as explained in the section of the above problem, when the radiator 100 is operated, the tube 110 and the side plate 130 or the tube 110 (the core plate portion 141 shown in FIG. Stress is generated in the brazing portion 150). And if the core plate part 141 to which the tube 110 is brazed is a flat surface, the stress tends to concentrate on the end part in the longitudinal direction of the flat tube cross section.

  In the present invention, the cross-sectional shape orthogonal to the longitudinal direction (tube stacking direction) of the core plate portion 141 is configured to protrude in the longitudinal direction of the tube 110 and to the outside of the tank 140. Therefore, the core plate portion 141 is flat. Compared with a certain case, the brazing area of the brazing portion 150 can be increased, and stress concentration caused by the acting force F due to the difference in thermal expansion of the tube 110 can be eliminated. Stress can be reduced.

  In addition, since the projecting portion is provided in the core plate portion 141 as described above, it can be formed as the tank 140 only by aligning the outer shape line of the cap portion 144 on the mating side with the projecting portion. The folding process of 140A and 140B is not complicated.

  Further, when the tank 140 is formed, the groove 148 and the claw portion 149 can reduce the gap in the brazed joint portion between the first plate member 140A and the second plate member 140B, so that the soldering is surely stable. Adhesion can be ensured. In addition, about the setting position of the groove part 148 and the nail | claw part 149, you may make it provide the groove part 148 in the 2nd plate member 140B side, and provide the nail | claw part 149 in the 1st plate member 140A side.

(Second Embodiment)
A second embodiment of the present invention is shown in FIGS. In the second embodiment, ribs 143a and 143b are provided on the second plate member 140B with respect to the first embodiment.

  Specifically, a rib 143a extending in the longitudinal direction is provided on the opposing wall portion 143 of the second plate member 140B, and a rib 143b extending in the standing direction is provided on the cap portion 144. Both ribs 143a and 143b project to the inner space 145 side when the tank 140 is formed (recessed to the inner space 145 side when viewed from the outside of the tank 140).

  As a result, the rigidity of the second plate member 140B can be increased, and deformation when the second plate member 140B is assembled to the first plate member 140A to form the tank 140 can be prevented, so both plate members 140A, 140B can be prevented. Stable brazing can be achieved by reducing the gap between them.

  Further, after the formation of the tank 140, the ribs 143a and 143b serve as reinforcing ribs in the second plate member 140B, so that the pressure resistance of the tank 140 can be improved.

  Further, since the ribs 143a and 143b protrude toward the internal space 145, the outline of the tank 140 can be prevented from becoming large, and the mounting property on the vehicle is not deteriorated.

  Further, in order to engage the claw portion 149 with the side wall portion 142 of the first plate member 140A, for example, as shown in FIG. 8, when using a tool such as pliers or pliers, the rib 143a is attached to one side of the tool. It can be used as a positioning part for blades.

  In the present embodiment, the rib 143a is provided on the elongated opposing wall 143, which is particularly effective. The rib 143b is abolished in accordance with the gap between the plate members 140A and 140B when the tank 140 is formed. May be.

  Further, the ribs 143a and 143b may protrude to the outside of the tank 140 if there is a margin in mounting on the vehicle.

(Third embodiment)
A third embodiment of the present invention is shown in FIGS. The third embodiment is obtained by changing the joining shape of the side wall portion 142 and the cap portion 144 (Modification 1) with respect to the first embodiment.

  Here, a bonding groove 142a that is recessed from the inner space 145 side to the outer side is provided in a portion corresponding to the cap portion 144 of the side wall portion 142 of the first plate member 140A, and the width dimension of the cap portion 144 is further changed to the opposing wall portion. It is made larger than the width dimension of 143. That is, the position of the end portion 144a of the cap portion 144 is moved toward the side wall portion 142 by an amount corresponding to the depth of the joining groove portion 142a.

  When the tank 140 is formed, the second plate member 140B is assembled to the first plate member 140A so that the end portion 144a of the cap portion 144 slides in the joining groove portion 142a.

  Accordingly, the second plate member 140B can be assembled to the first plate member 140A using the joining groove 142a as a guide, so that the assemblability of both the plate members 140A and 140B can be improved.

  Further, when the two plate members 140A and 140B are brazed, the joining groove 142a becomes a brazing reservoir portion, so that the brazing performance between the side wall portion 142 and the cap portion 144 can be improved.

(Fourth embodiment)
A fourth embodiment of the present invention is shown in FIGS. The fourth embodiment is obtained by changing the joining shape of the side wall part 142 and the cap part 144 (Modification 2) with respect to the first embodiment.

  Here, a slit portion (corresponding to the first slit portion in the present invention) 142b having a width corresponding to the plate thickness of the second plate member 140B is provided in a portion corresponding to the cap portion 144 of the side wall portion 142 of the first plate member 140A. Furthermore, the width dimension of the cap part 144 is made larger than the width dimension of the opposing wall part 143. In other words, the cap 144 is moved to a position where the end 144 a of the cap 144 protrudes from the outer surface of the side wall 142.

  When the tank 140 is formed, the second plate member 140B is assembled to the first plate member 140A so that the end portion 144a of the cap portion 144 slides in the slit portion 142b.

  Accordingly, the second plate member 140B can be assembled to the first plate member 140A using the slit portion 142b as a guide, so that the assemblability of both the plate members 140A and 140B can be improved.

  Further, when brazing the two plate members 140A and 140B, the side wall portion 142 and the cap portion 144 intersect with each other, and the number of locations where the two plate members 140A and 140B are in contact with each other may be increased as compared with the case of the butting. it can. Therefore, since the fillet at the time of brazing becomes easy to be formed, the brazing property between the side wall part 142 and the cap part 144 can be improved. Specifically, for example, assuming that a brazing material is provided on the outer surfaces of both plate members 140A and 140B, the fillet at the time of brazing is a slit portion 142b of a, b, and c in FIG. Formed in three places.

(Fifth embodiment)
A fifth embodiment of the present invention is shown in FIGS. The fifth embodiment is obtained by changing the joining shape of the side wall part 142 and the cap part 144 (Modification 3) with respect to the first embodiment.

  Here, the side wall 142 side of the cap part 144 is opened from the core plate part 141 side and has a width corresponding to the thickness of the first plate member 140A, and the opposite wall part 143 side of the side wall part 142 is An inserted slit portion (corresponding to the second slit portion in the present invention) 144b is provided.

  When the tank 140 is formed, the second plate member 140B is assembled to the first plate member 140A so that the opposite wall portion 143 side end portions of the both side wall portions 142 slide within the slit portion 144b of the cap portion 144.

  Thereby, since the 2nd plate member 140B can be assembled | attached to the 1st plate member 140A, using the slit part 144b as a guide, the assembly | attachment property of both plate members 140A and 140B can be improved.

  Moreover, since the position of the side wall part 142 can be restrained with respect to the cap part 144, the clearance gap between the side wall part 142 and the cap part 144 can be reduced, and the brazing property between both 142 and 144 can be improved. .

  Note that the length of the slit portion 144b (the length of the cap portion 144 in the standing direction) may be determined according to the size of the gap formed between the side wall portion 142 and the cap portion 144.

(Sixth embodiment)
A sixth embodiment of the present invention is shown in FIG. The sixth embodiment is obtained by changing the joining shape of the side wall part 142 and the cap part 144 (Modification 4) with respect to the first embodiment.

  Here, a bent portion (corresponding to the first bent portion in the present invention) 144c that comes into contact with the inner surface of the core plate portion 141 and the side wall portion 142 is provided on the outer peripheral edge portion of the cap portion 144 of the first plate member 140A. ing.

  Accordingly, when the two plate members 140A and 140B are brazed, the bent portion 144c becomes a brazing allowance for the core plate portion 141 and the side wall portion 142, and the brazing area can be increased. The brazing property between the portion 142 and the cap portion 144 can be improved.

  Note that the bent portion 144c may be provided so as to be in contact with at least one of the core plate portion 141 and the side wall portion 142 in accordance with the brazability between the side wall portion 142 and the cap portion 144. That is, the bent portion 144c is not limited to the entire area of the outer peripheral edge portion of the cap portion 144, and may be provided partially.

  In addition, as shown in FIG. 17, a bent portion (corresponding to the second bent portion in the present invention) 143 c that comes into contact with the inner side surface of the side wall portion 142 is provided at the end of the facing wall portion 143 on the side wall portion 142 side. May be. Thereby, the brazing property of the side wall part 142 and the opposing wall part 143 can be improved. Further, as the second plate member 140B, in addition to the claw portion 149, the bent portion 143c is taken as a meat portion, so that the yield can be improved.

  The bent portions 144c and 143c may be in contact with the outer surfaces of the core plate portion 141 and the side wall portion 142.

(Seventh embodiment)
A seventh embodiment of the present invention is shown in FIGS. The seventh embodiment is obtained by changing the joining shape of the core plate part 141 and the cap part 144 to the first embodiment (Modification 5).

  Here, through-holes 141b (two) having a width corresponding to the plate thickness of the second plate member 140B are provided on the slope of the trapezoidal shape of the core plate portion 141, and the end portion of the cap portion 144 in the standing direction The 144d side is rectangular. When the second plate member 140B is assembled to the first plate member 140A, the corner portion of the end portion 144d of the cap portion 144 (at least a part of the end portion 144d) penetrates into the through hole 141b. .

  Thereby, compared with the case where the core plate part 141 and the cap part 144 are faced together, the gap between both the parts 141 and 144 can be reduced, so that the brazing property between the core plate part 141 and the cap part 144 is improved. can do.

  In addition, with respect to the seventh embodiment, as shown in FIGS. 20 to 22, the through hole 141 b (one) extends over the entire core plate portion 141, and a burring 141 c is formed around the through hole 141 b. In addition, the entire end portion 144d of the cap portion 144 may pass through the through hole 141b.

  Thereby, the brazing area can be increased and the brazing performance between the core plate portion 141 and the cap portion 144 can be further improved. Note that the direction of the burring 141c may be opposite to that of FIG. 22 depending on the insertion property of the end 144d into the through hole 141b.

(Eighth embodiment)
An eighth embodiment of the present invention is shown in FIGS. The eighth embodiment is obtained by changing the joining shape of the core plate part 141 and the cap part 144 to the first embodiment (Modification 6).

  Here, a window portion 141d is formed in the core plate portion 141, and an engaging convex portion 144e having a convex shape is provided on the end portion 144d (core plate portion 141 side) in the standing direction of the cap portion 144. Yes.

  The engagement convex portion 144e is formed with a neck portion 144g corresponding to the window portion 141d at the base portion and an overhanging portion 144f that is wider than the neck portion 144g at the tip side.

  When the second plate member 140B is assembled to the first plate member 140A, the engaging convex portion 144e is inserted into the window portion 141d so that the overhanging portion 144f engages with the outer surface of the core plate portion 141. ing.

  Accordingly, the core plate is not inserted into the window plate 144d by simply inserting the engaging convex portion 144e, that is, by bending the claw portion 149 as in the first embodiment, without applying a large load to the core plate portion 141. Since the gap between the portion 141 and the cap portion 144 can be reduced, the brazing property between the core plate portion 141 and the cap portion 144 can be improved.

(Other embodiments)
In contrast to the above embodiments, the groove 148 and the claw 149 for temporarily fixing the two plate members 140A and 140B when the tank 140 is assembled are shown in FIG. 25 and FIG. Then, the fitting window 148a provided on the second plate member 140B) and the fitting convex portion 149a provided on the other plate member (here, the first plate member 140A) may be changed. In this case, both the plate members 140A and 140B are temporarily fixed by inserting (fitting) the fitting convex portion 149a into the fitting window portion 148a.

  Further, the protruding shape of the core plate portion 141 toward the tube 110 is not limited to a trapezoidal shape, and may be an arc shape.

  In the above embodiments, the radiator 100 is made of aluminum, but may be made of other metals. For example, the plate member constituting the tank may be a stainless steel plate having a copper brazing material clad on the surface thereof.

  Moreover, although each said embodiment demonstrated as what was applied to the radiator 100 as a heat exchanger, you may apply to another heat exchanger (for example, a condenser, an evaporator, an intercooler, etc.).

It is a front view which shows the whole structure of the radiator (heat exchanger) in 1st Embodiment. (A) which shows the 1st plate member which comprises the tank in 1st Embodiment is a top view, (b) is a front view, (c) is a side view from the A direction of (b). (A) which shows the 2nd plate member which comprises the tank in 1st Embodiment is a top view, (b) is a front view, (c) is a side view from the B direction of (b). It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 1st Embodiment. It is a perspective view showing the state where the 1st plate member and the 2nd plate member in a 1st embodiment were assembled and joined mutually. It is sectional drawing which shows the brazing part of the tube and core plate part in 1st Embodiment. (A) which shows the 2nd plate member which comprises the tank in 2nd Embodiment is a top view, (b) is a front view, (c) is a side view from the C direction of (b). It is sectional drawing which shows the engagement method to the side wall part of the nail | claw part in 2nd Embodiment. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 3rd Embodiment. It is an arrow view from the D direction in FIG. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 4th Embodiment. It is a perspective view showing the state where the 1st plate member and the 2nd plate member in a 4th embodiment were assembled and joined mutually. It is an arrow view from the E direction in FIG. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 5th Embodiment. It is a perspective view showing the state where the 1st plate member and the 2nd plate member in a 5th embodiment were assembled and joined mutually. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 6th Embodiment. It is a perspective view which shows the 2nd plate member in the modification of 6th Embodiment. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 7th Embodiment. It is a perspective view showing the state where the 1st plate member and the 2nd plate member in a 7th embodiment were assembled and joined mutually. It is a perspective view showing the combination method of the 1st plate member and the 2nd plate member in the modification of a 7th embodiment. It is a perspective view showing the state where the 1st plate member and the 2nd plate member in the modification of a 7th embodiment were assembled and joined mutually. It is sectional drawing which shows the GG part in FIG. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in 8th Embodiment. It is an arrow view from the H direction in FIG. It is a perspective view which shows the combination method of the 1st plate member and 2nd plate member in other embodiment. It is sectional drawing which shows the state which the 1st plate member and 2nd plate member in other embodiment were assembled | attached, and were mutually joined.

Explanation of symbols

100 radiator (heat exchanger)
DESCRIPTION OF SYMBOLS 110 Tube 140 Tank 140A 1st plate member 140B 2nd plate member 141 Core plate part 141b Through-hole 141c Burring 141d Window part 142 Side wall part 142a Joining groove part (1st slit part)
142b Slit part 143 Opposite wall part 143a Rib 143b Rib 143c Bending part (2nd bending part)
144 Cap part 144a End part 144b Slit part (2nd slit part)
144c Bent part (first bent part)
144d End portion 144e Engaging convex portion 144f Overhang portion 145 Internal space 148 Fitting groove portion 148a Fitting window portion 149 Engaging claw portion 149a Fitting convex portion

Claims (13)

A plurality of stacked tubes (110);
A tank (140) extending in the stacking direction of the plurality of tubes (110), connected to a longitudinal end of the tubes (110), and having an internal space (145) communicating with the tubes (110). In the heat exchanger,
The tank (140) includes a core plate part (141) to which the tube (110) is connected by bending a metal plate, and the inner side from two sides along the stacking direction of the core plate part (141). A first plate member (140A) provided with a side wall (142) facing and extending so as to sandwich the space (145);
The metal plate is bent, the opposing wall portion (143) facing the core plate portion (141) across the internal space (145), and 2 on the end side in the stacking direction of the opposing wall portion (143). A second plate member (140B) provided with a cap portion (144) facing and extending from one side to sandwich the internal space (145) is formed by brazing with each other,
A heat exchange characterized in that a cross-sectional shape perpendicular to the laminating direction of the core plate portion (141) is formed so as to protrude in the longitudinal direction of the tube (110) and outside the tank (140). vessel.   The heat exchanger according to claim 1, wherein the second plate member (140B) is provided with at least one rib (143a, 143b).   The heat exchanger according to claim 2, wherein the ribs (143a, 143b) protrude toward the internal space (145).   The said side wall part (142) is provided with the joining groove part (142a) by which the edge part (144a) side of the said cap part (144) which opposes is provided, The any one of Claims 1-3 The heat exchanger as described in any one. The side wall portion (142) is provided with a first slit portion (142b) into which the end portion (144a) side of the opposed cap portion (144) is inserted,
The said end part (144a) protrudes rather than the outer surface of the said side wall part (142), The heat exchanger as described in any one of Claims 1-3 characterized by the above-mentioned.   A second slit portion (144b) into which the opposite wall portion (143) side of the side wall portion (142) is inserted is provided on the side wall portion (142) side of the cap portion (144). The heat exchanger according to any one of claims 1 to 3.   A first bent portion (144c) that is bent so as to contact at least one of the core plate portion (141) and the side wall portion (142) is formed on the outer peripheral edge portion of the cap portion (144). The heat exchanger according to any one of claims 1 to 3, characterized in that:   A second bent portion (143c) that is bent so as to come into contact with the side wall portion (142) is formed at an end portion of the opposing wall portion (143) on the side wall portion (142) side. The heat exchanger according to any one of claims 1 to 7.   The said core plate part (141) is provided with the through-hole (141b) which at least one part of the edge part (144d) of the said cap part (144) which opposes penetrates. Item 9. The heat exchanger according to any one of items 8.   The heat exchanger according to claim 9, wherein a burring (141c) is formed in the through hole (141b). In the core plate part (141), a window part (141d) is formed,
The cap portion (144) has a convex shape on the core plate portion (141) side and a protruding portion (144f) provided on the base portion side, and is inserted into the window portion (141d). The engagement convex part (144e) engaged with the outer surface of the core plate part (141) is formed by the overhang part (144f). Heat exchanger. A concave fitting groove (148) is formed at the end of one of the first plate member (140A) and the second plate member (140B) (140A),
At the end of the other (140B), an engaging claw (149) is formed that fits into the fitting groove (148) and whose tip engages with the outer surface of the one (140A). The heat exchanger according to any one of claims 1 to 11, wherein: A fitting window portion (148a) is formed at the end of one of the first plate member (140A) and the second plate member (140B) (140B),
The fitting convex part (149a) fitted in the said fitting window part (148a) was formed in the edge part of the other (140A), The any one of Claims 1-11 characterized by the above-mentioned. The heat exchanger according to one.

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