JP4946962B2 - Heat exchanger and manufacturing method thereof - Google Patents

Description

  The present invention relates to a heat exchanger including a first plate-like member that forms part of a tubular part such as a cap, and a second plate-like member such as a bracket joined to the outer surface thereof, and a method for manufacturing the same.

In the heat exchanger described in Patent Document 1, a bracket is fixed to one end of a tubular part. Patent Document 1 discloses that the bracket is inserted into a tubular part and temporarily fixed (temporarily fixed), and then brazed and joined.
JP 2000-227297 A

  Further, as a temporary fixing method before joining the cap and the bracket, for example, a method of temporarily fixing the cap and the bracket by providing holes in both the cap and the bracket and inserting rivets into both holes can be considered. .

  However, both of the above two methods are not preferable because a hole is provided in a member constituting the tubular part, and this causes a leakage failure of the heat exchange fluid flowing in the tubular part.

  Also, as in the latter method, using a third part such as a rivet increases the number of parts and complicates the assembly. Therefore, the latter method is not preferable from the viewpoint of easy assembly.

  In view of the above, the present invention provides a first plate-like member that forms part of a tubular part without providing a hole in the plate-like member that forms part of the tubular part, and without using a third part. It aims at providing the structure and method which can temporarily fix the 2nd plate-shaped member joined to the 1st plate-shaped member.

  In order to achieve the above object, according to the first aspect of the present invention, the first plate member (17) is formed integrally with the first plate member (17), and the second plate member (18). A claw portion (33a, 33b) having a length that the tip reaches on the second surface opposite to the first surface to be joined to the first plate-like member, and the tip side of the claw portion (33a, 33b) Are provided with deformed portions (36a, 36b) deformed on the second surface, and the first plate member (17) and the second plate member (18) are deformed portions (36a, 36b). It is characterized by being joined in an engaged state.

  According to this, since the first plate member (17) and the second plate member (18) are engaged with each other by the claw portion provided integrally with the first plate member, a part of the tubular part is attached. The first plate member and the second plate member can be temporarily fixed without providing a hole in the first plate member and without using the third component.

  Furthermore, in invention of Claim 2, a 2nd plate-shaped member (18) is a shape along the external shape of a nail | claw part (33a, 33b), Comprising: From the edge part of a 2nd plate-shaped member (18). It has a recess (46) recessed inward or a hole (47) that penetrates the second plate member (18), and the claw portions (33a, 33b) are located in the recess (46) or hole (47). It is characterized by having. Thereby, compared with the case where a recessed part (46) or a hole (47) is not provided, the position shift of the 1st plate-shaped member and the 2nd plate-shaped member at the time of joining can be prevented.

  Furthermore, in the invention according to claim 3, the recess (46) or the hole (47) has a width dimension equivalent to the outer dimension of the claw part (33a, 33b) and a width dimension of the nail. The heat exchanger according to claim 2, further comprising a portion (47b) larger than an outer dimension of the portion (33a, 33b). According to this, since the concave portion or the hole portion is provided with a portion whose width dimension is larger than the outer dimension of the claw portion, the claw portion can be easily inserted into the concave portion or the hole portion during assembly.

  In the invention according to claim 4, the first plate member (17) is formed integrally with the first plate member (17), and is joined to the first plate member of the second plate member (18). There are claw portions (33a, 33b) of a length that the tip reaches on the second surface opposite to the first surface, and a first plate-like member (33a, 33b) is provided on the tip side of the claw portions (33a, 33b). 17 is provided with hook portions (71a, 71b) shaped to be hooked on the second plate member (18) in the direction away from the second plate member (18), and the first plate member (17). And the second plate-like member (18) are characterized by being joined in a state of being engaged by the catch portions (71a, 71b). This also achieves the same effect as that of the first aspect of the invention.

  In the invention according to claim 5, the first plate member (17) has a convex portion formed integrally with the first plate member (17), and the second plate member (18). Has a press-fit portion into which the convex shape portion is press-fitted, and the first plate-like member (17) and the second plate-like member (18) are in a state in which the convex shape portion and the press-fit portion are fitted. It is characterized by being joined. This also achieves the same effect as that of the first aspect of the invention.

  Specifically, as shown in claim 6, the first plate-like member is a cap (17) that closes the opening of the tubular part (14), and the second plate-like member is on the other side of the heat exchanger. It is a bracket (18) for attaching to a structure.

  In the invention according to claim 7, the bracket (18) is a flat plate in which a joint portion (18a) to be joined to the cap (17) and an attachment hole (41) for attachment to the counterpart structure are formed. A mounting portion (18b) having a shape, and the mounting portion (18b) has a quadrilateral shape substantially orthogonal to the core surface of the heat exchange core portion (13), and a direction substantially orthogonal to the core surface. One of the two sides (44, 45) facing each other is inclined with respect to the core surface. According to this, when the whole heat exchanger is brazed integrally with the core surface of the heat exchange core portion being horizontal, the heat exchanger is installed with the inclined side of the mounting portion of the bracket facing down. Thus, it is possible to flow the molten brazing material to the lower side of both end portions of the inclined side during brazing, and it is possible to prevent the brazing material from accumulating on the side that is the lowermost end of the attachment portion.

  The invention according to claim 8 is the tubular part (14) constituting the flow path of the heat exchange fluid flowing in the heat exchange core part (13), and the first plate member (a part of the tubular part (14)). 17) In the manufacturing method of a heat exchanger provided with the 2nd plate-shaped member (18) joined to the outer surface, the process of preparing a 1st plate-shaped member (17) and a 2nd plate-shaped member (18), The assembling step for assembling the first plate-like member (17) and the second plate-like member (18), and the joining for joining the first plate-like member (17) and the second plate-like member (18) after assembling. And has the following features.

  That is, in the step of preparing the first plate member (17) and the second plate member (18), the first plate member (17) is formed integrally with the first plate member (17). When the second plate-like member (18) and the second plate-like member (18) are assembled, the tip is on the second surface of the second plate-like member (18) opposite to the first surface that contacts the first plate-like member (17). The first and second claw portions (33a, 33b) have a length that can be reached, and the first and second claw portions (33a, 33b) are end portions of the first plate-like member (17), and A first plate-like member (17) arranged at an opposing position is prepared. The assembling step includes an overlapping step of overlapping the first plate-like member (17) and the second plate-like member (18), and a second surface of the second plate-like member (18) after the overlapping step. An engagement step of engaging the first plate member (17) and the second plate member (18) by deforming the tip portions of the first and second claw portions (33a, 33b) existing above. And have. Moreover, a joining process joins in the state which installed the 1st plate-shaped member (17) and the 2nd plate-shaped member (18) by making the arrangement direction of a 1st, 2nd nail | claw part (33a, 33b) into an up-down direction. To do.

  According to this, since the first plate member (17) and the second plate member (18) are engaged with each other by the claw portion provided integrally with the first plate member, a part of the tubular part is attached. The first plate member and the second plate member can be temporarily fixed without providing a hole in the first plate member and without using the third component.

  Furthermore, in the invention according to claim 9, the assembling step is one of the first and second claw portions (33a, 33b) located on the lower side in the joining step between the overlapping step and the engaging step. (33a) is characterized by having a step of bringing the end of the second plate-like member (18) closer. Thereby, position shift with the 1st plate-like member (17) and the 2nd plate-like member (18) in a joining process can be controlled.

  Furthermore, in the invention according to claim 10, the step of preparing the first plate member (17) and the second plate member (18) includes a metal plate material having a brazing material layer on the surface and a uniform plate thickness. After the step of forming the first plate member (17) having a predetermined shape having the first and second claw portions (33a, 33b) and the step of forming the first plate member (17), By pressing one of the first and second claw portions (33a, 33b) (33a), the thickness of one of the first and second claw portions (33a, 33b) is reduced to the first plate shape. And a step of making the member (17) thinner than the plate thickness of portions other than the first and second claw portions (33a, 33b) of the member (17). According to this, at the time of joining by brazing, the outflow amount of the brazing material can be reduced, and the movement of the bracket held by the first and second claw portions in the direction of gravity can be suppressed. A positional deviation between the plate-like member (17) and the second plate-like member (18) can be suppressed.

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

(First embodiment)
In FIG. 1, the front view of the heat exchanger in 1st Embodiment of this invention is shown. The up, down, left, and right arrows in FIG. 1 indicate the up, down, left, and right directions in the vehicle mounted state. In this embodiment, the heat exchanger of the present invention is applied to a condenser 10.

  The condenser 10 of the present embodiment is a so-called subcool condenser that exchanges heat between the refrigerant and air and cools it to a supercooling region, and as shown in FIG. 1, as shown in FIG. 1, a heat exchange core section composed of a plurality of tubes 11 and fins 12. 13, first and second header tanks 14 and 15 that are assembled and arranged at both left and right ends of the heat exchange core 13, and a liquid receiver that is disposed outside the second header tank 15 (opposite to the core 13). A modulator 16, a cap 17 provided at the upper end of the first header tank 14, and a bracket 18 joined to the cap 17. Each component of the condenser 10 is made of a metal such as aluminum or an aluminum alloy.

  The tube 11 is a flat tube through which a refrigerant flows. A plurality of tubes 11 are arranged in parallel in the vertical direction so that the major axis direction thereof coincides with the air flow direction (perpendicular to the paper surface) and the longitudinal direction thereof coincides with the horizontal direction. ing. The fins 12 are formed in a wave shape and are joined to both flat surfaces of the tubes 11 between the plurality of tubes 11, and the fins 12 increase the heat transfer area with the air to heat the heat medium and the air. Promoting exchanges.

  Moreover, the 1st side plate 19 is arrange | positioned above the tube 11 located in the uppermost part, and the 2nd side plate 20 is arrange | positioned under the tube 11 located in the lowest part.

  The first and second header tanks 14 and 15 are tubular parts, and are perpendicular to the longitudinal direction of the tube 11 at the longitudinal end portions (left and right end portions in FIG. 1) of the tube 11 (vertical direction in FIG. 1). ) To communicate with the plurality of tubes 11. As the first and second header tanks 14 and 15, for example, a structure having a core plate into which the tube 11 is inserted and joined, and a tank main body portion that constitutes a tank internal space together with the core plate, or an extrusion molding is used. What was formed in the cylindrical shape is employable.

  The cap 17 closes the opening at the end of the first header tank 14 and forms a part of a tubular part. The bracket 18 is connected to a counterpart structure such as a vehicle body, a radiator, and a refrigerant pipe. This is for fixing to the condenser 10. With this bracket 18, the condenser 10 is attached to the vehicle body, the condenser 10 is fastened to the radiator, or the refrigerant pipe is fixed to the condenser 10. A cap (not shown) is provided at both ends or one end of the second header tank 15, and a bracket (not shown) is also provided at the second header tank 15 or the liquid receiver 16.

  Here, FIG. 2A shows an enlarged view of the region A1 in FIG. 1, and FIG. 2B shows a top view of the region A1 portion in FIG. 1 viewed from the upper side in FIG. 3 is a side view of the region A1 portion in FIG. 1 as viewed from the left side in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 (a), (b), and (c) show a first side view, a top view, and a second side view of only the cap 17 in FIG. 1, and FIGS. ) And (c) respectively show a first side view, a top view, and a second side view of only the bracket 18 in FIG. In addition, the cap 17 shown in FIG. 5 has shown the state before an assembly | attachment.

  The cap 17 is, for example, a metal material processed into a flat plate shape. As shown in FIGS. 2A and 2B, the cap 17 is a portion facing the first header tank 14, and a side portion. And a portion 17 b facing the plate 19.

  As shown in FIG. 2A, the surface (lower surface) of the cap portion 17a on the first header tank 14 side is joined to the first header tank 14, and the surface (upper surface) of the cap portion 17a on the bracket 18 side. It is joined to the bracket 18. Therefore, the cap part 17 a is a cap side joint part joined to the first header tank 14.

  As shown in FIGS. 2A, 2B, 5A, and 5B, the cap portion 17a includes a convex portion 31 that protrudes toward the first header tank 14 and a peripheral portion 32 in the vicinity thereof. And have. The convex-shaped part 31 is formed when the part corresponding to the convex-shaped part 31 is dented among the surfaces on the opposite side to the 1st header tank 14 side of the cap part 17a. The convex portion 31 is fitted into the upper end opening of the first header tank 14. The peripheral portion 32 has a flat plate shape and is a joint portion between the first header tank 14 and the bracket 18.

  As shown in FIGS. 2A and 6A, the bracket 18 is a part other than the flat joint portion 18 a joined to the cap 17 and the joint portion 41 and is attached to the mating structure. And a flat mounting portion 18b. The joining portion 18 a is substantially orthogonal to the longitudinal direction of the first header tank 14, and the attachment portion 18 b is substantially parallel to the longitudinal direction of the first header tank 14 and substantially orthogonal to the longitudinal direction of the tube 11. Yes.

  As shown in FIGS. 2B and 6B, the joining portion 18a is, for example, substantially rectangular and has a width equal to or larger than that of the cap portion 17a.

  As shown in FIGS. 3 and 6C, the attachment portion 18 b is provided with an attachment hole 41 into which a screw for attaching to the counterpart structure is inserted. The mounting portion 18b has, for example, a substantially trapezoidal shape, and a pair of sides 42 and 43 that face each other in the vertical direction in the drawing, that is, the longitudinal direction of the first header tank 14, are parallel to each other, That is, the pair of sides 44 and 45 facing in the direction perpendicular to the core surface of the heat exchange core portion 13 are not parallel, and one side 44 is parallel to the longitudinal direction of the first header tank 14. The other side 45 is inclined with respect to the longitudinal direction of the first header tank 14. The oblique side 45 becomes the lowermost end (bottom side) of the attachment portion 18b when the assembled condenser 10 is installed in the furnace.

  As for the positional relationship between the bracket 18 and the cap 17, as shown in FIG. 2B, the position of one end (upper end in the figure) of the joint 18 a of the bracket 18 and one end (upper end in the figure) of the cap 17. The position coincides with the vertical direction in FIG. 2B, that is, in the direction perpendicular to the core surface of the heat exchange core portion 13. This is because when the assembled condenser 10 is installed in the furnace, the side where one end of the bracket 18 and one end of the cap 17 are aligned is set as the lower side.

  The cap 17 has seven claw portions for fixing when the condenser 10 is assembled. The first and second claw portions 33a and 33b are for fixing the cap 17 and the bracket 18, and the third, fourth and fifth claw portions 34a, 34b and 34c are the cap 17 and the first header. The sixth and seventh claw portions 35 a and 35 b are for fixing the cap 17 and the side plate 19.

  The first and second claw portions 33a and 33b are formed in the cap portion 17a in the vertical direction of FIGS. 2B and 5B, that is, in a direction substantially orthogonal to the core surface of the heat exchange core portion 13 (FIG. 1). Are arranged at both ends in the direction perpendicular to the paper surface). The core surface is a surface of the heat exchange core portion 13 and means a plane including the longitudinal direction of the tube 11 and the stacking direction of the plurality of tubes 11.

  As shown in FIGS. 2B and 3, the first and second claw portions 33 a and 33 b extend from the upper side in the drawing, that is, from the cap 17 to the bracket 18 side. As shown in FIGS. 5A and 5C, the first and second claw portions 33a and 33b have a rectangular parallelepiped shape that is long in a direction substantially orthogonal to the cap portion 17a of the cap 17 in a state before assembly. It has become.

  In the state where the cap 17 and the bracket 18 are joined, as shown in FIGS. 2B and 4, the first claw portion 33 a is formed in the recess 46 provided at the end of the joint portion 18 a of the bracket 18. The second claw portion 33b is inserted into a hole 47 provided near the center of the joint portion 18a of the bracket 18, and the tip portions 36a, 36b of the first and second claw portions 33a, 33b face each other. Folded to the side and crimped.

  These front end portions 36a and 36b are located on the second surface of the bracket 18 opposite to the first surface on the cap 17 side, and are parallel to the surface of the bracket 18 (joint portion 18a). These front end portions 36a, 36b constitute deformed portions of the first and second claw portions. When the deforming portions 36a and 36b of the first and second claw portions 33a and 33b are hooked on the bracket 18, the bracket 18 is positioned and engaged with the cap 17 so as not to move in all directions. This engaged state has a strength necessary for temporarily fixing (temporarily fixing) the cap 17 and the bracket 18 in a manufacturing process to be described later, and a strength that prevents the bracket 18 from falling off the cap 17. In this manner, the cap 17 and the bracket 18 are brazed and fixed firmly with the first and second claw portions 33a and 33b engaged with each other.

  Here, the recess 46 and the hole 47 provided in the bracket 18 will be described. As shown in FIGS. 5B and 6B, the recess 46 corresponds to the first claw 33 a of the cap 17. It is a portion that is disposed at a position and is recessed from the end of the joint surface 18a of the bracket 18 toward the center. The recess 46 has a shape along the outer shape of the first claw portion 33a, and the width 46a of the recess 46 is substantially equal to the width 37 of the first claw portion 33a. The hole 47 is disposed at a position corresponding to the second claw portion 33 b of the cap 17. The hole 47 has an opening width 47a on the opposite concave portion 46 side substantially equal to the width 38 of the second claw portion 33b, and the opening width 47b on the side away from the concave portion 46 has a width 38 of the second claw portion 33b. Is bigger than. The hole 47 of this embodiment has a tapered shape in which the opening width gradually increases as the distance from the recess 46 increases. The width and the opening width here are dimensions in a direction parallel to the longitudinal direction of the tube 11. Since the first and second claw portions 33a and 33b are positioned by the concave portion 46 and the hole portion 47, the cap 17 and the bracket 18 are particularly arranged in the left-right direction in FIG. 11 is positioned so as not to move in a direction parallel to the longitudinal direction.

  On the other hand, the third, fourth, and fifth claw portions 34a, 34b, and 34c and the sixth and seventh claw portions 35a and 35b are shown in FIGS. 2 (a), 3, 5 (a), and (c). As described above, the first and second claw portions 33a and 33b extend on the opposite side, that is, on the first header tank 14 side. Although not shown in the third, fourth, and fifth claw portions 34a, 34b, and 34c and the sixth and seventh claw portions 35a and 35b, the cap 17 is connected to the first header tank 14 and the side by bending the tip side. The cap 17 is engaged with the plate 19, and the cap 17 is brazed to the first header tank 14 and the side plate 19 in this state. In addition, the 3rd nail | claw part 34a is provided in the edge of the hole provided in the part 17b facing the side plate 19, as shown in FIG.2 (b) and FIG.5 (b).

  As shown in FIG. 1, a refrigerant inlet portion 21 is provided at the upper end portion of the first header tank 14, and a refrigerant outlet portion 22 is provided at the lower end portion of the first header tank 14. A partition plate 23 is disposed at a lower position in the first header tank 14. A partition plate 24 is disposed in the second header tank 15 at the same height as the partition plate 23 of the first header tank 14.

  Of the heat exchange core part 13, the part above the partition plates 23, 24 of the first and second header tanks 14, 15 causes the gas-phase refrigerant flowing from the refrigerant inlet part 21 and air to exchange heat, The condensing part 25 which condenses a refrigerant | coolant is comprised. A portion of the heat exchange core portion 13 below the condensing portion 25 constitutes a supercooling portion 26 that cools the liquid phase refrigerant by exchanging heat between the liquid phase refrigerant and air. Thus, the heat exchange core part 13 is a part which performs heat exchange between the refrigerant | coolant as a heat exchange fluid, and air.

  The liquid receiver 16 separates the gas-phase refrigerant and the liquid-phase refrigerant and accumulates the liquid-phase refrigerant, and has a substantially cylindrical shape extending in the vertical direction.

  In the condenser 10 having the above-described configuration, the refrigerant flows as follows. That is, the gas-phase refrigerant that has flowed from the refrigerant inlet 21 into the upper space of the first header tank 14 flows in one direction from the first header tank 14 side to the second header tank 15 side through the condensing unit 25 and the air. Heat exchanges and condenses. The refrigerant condensed in the condensing unit 25 collects in the space above the second header tank 15 and then flows into the liquid receiver 16 as indicated by an arrow a. The liquid phase refrigerant accumulated in the liquid receiver 16 flows into the lower space of the second header tank 15 as indicated by the arrow b, and moves the supercooling portion 26 from the second header tank 15 side to the first header tank 14 side. It flows in one direction and is cooled by exchanging heat with air. The refrigerant cooled by the supercooling unit 26 flows out from the refrigerant outlet unit 22 after gathering in the lower space of the first header tank 14.

  Next, a method for manufacturing the condenser 10 having the above-described configuration will be described.

  First, the tube 11, the fin 12, the first and second header tanks 14 and 15, the liquid receiver 16, the cap 17, the bracket 18, and the like, which are the respective components of the condenser 10, are manufactured. Among these, the cap 17 and the bracket 18 are manufactured by, for example, press molding or the like. The cap 17 and the bracket 18 are made of an aluminum alloy having a three-layer material structure in which a brazing material is clad on both sides. The bracket 18 is preferably made of an aluminum alloy containing Mg in the core material because high strength is required. In the present embodiment, the aluminum alloy plate constituting the bracket 17 is made of the core material portion. In order to prevent Mg from having an adverse effect during brazing, a three-layer structure in which a brazing material is clad on both sides is used to prevent Mg from scattering.

  And after assembling each component of the condenser 10, each component is temporarily fixed. Thereafter, the assembled condenser 10 is placed in the furnace with the back side of the condenser 10 shown in FIG. 1 as the lower side, that is, the direction substantially perpendicular to the core surface of the heat exchange core portion 13 as the vertical direction. The condenser 10 is integrally brazed by installing and heat-treating.

  Here, a temporary fixing method of the cap 17 and the bracket 18 will be described. 7A to 7C show the temporary fixing steps. FIG. 8 shows a cross-sectional view of the cap 17 and the bracket 18 in a temporarily fixed state. The vertical direction in FIG. 8 coincides with the vertical direction at the time of brazing, and FIG. 8 is shown upside down with respect to FIG.

  First, the cap 17 and the bracket 18 are assembled. At this time, the first and second claw portions 33a and 33b (see FIG. 5) of the cap 17 are aligned with the concave portion 46 and the hole portion 47 (see FIG. 6) of the bracket 18, and the cap 17 (cap portion 17a). And the bracket 18 are overlapped.

  Then, as shown in FIG. 7 (a), the lower end of the first and second claw portions 33a and 33b is in a lower position, that is, the end portion of the bracket 18 is brought into contact with the first claw portion 33a. Let

  Next, as shown in FIG. 7B, the caulking punch 51 is pressed against the tip portions 36a, 36b of the first and second claw portions 33a, 33b extending linearly in the left-right direction in the drawing, 36a and 36b are bent inward. At this time, the pressing direction of the caulking punch 51 is a direction substantially parallel to the bracket 18 and a direction substantially perpendicular to the first and second claw portions 33a and 33b.

  Next, as shown in FIG. 7C, the caulking punch 52 is pressed against the distal end portions 36a and 36b of the first and second claw portions 33a and 33b in the downward direction in the drawing, and the distal end portions 36a and 36b are moved. Crush. At this time, the pressing direction of the caulking punch 52 is a direction substantially perpendicular to the bracket 18.

  In this way, as shown in FIG. 8, with the bracket 18 being brought close to the first claw portion 33a which is the lower side in the brazing position among the first and second claw portions 33a and 33b, The bracket 18 is fixed by caulking. Thereby, after the cap 17 and the bracket 18 are assembled, the cap 17 and the bracket 18 can be held before brazing and during brazing. As shown in FIG. 8, the cap 17 and the bracket 18 are made of an aluminum alloy in which brazing materials 62, 63, 65, 66 are clad on both surfaces of the core materials 61, 64 as described above.

  Here, a cross-sectional view of the cap 17 and the bracket 18 when the process shown in FIG. 7 (a) is omitted and temporarily fixed is shown in FIG. 9 (a), and the cap 17 when brazed in that state A cross-sectional view of the bracket 18 is shown in FIG.

  As shown in FIG. 9 (a), the process shown in FIG. 7 (a) is omitted, and the bracket 18 is simply moved to the first claw portion 33a as shown in FIGS. 7 (b) and 7 (c). It is also possible to caulk the first and second claw portions 33a and 33b. In this case, as shown in FIG. 9B, the positional displacement between the cap 17 and the bracket 18 after brazing is as follows. May occur.

  The reason why this positional deviation occurs will be described. FIG. 10 shows an enlarged view around the first and second claw portions 33a and 33b in FIG. 9A, and FIG. 11 shows an enlarged view around the first and second claw portions 33a and 33b in FIG. . In the case where the bracket 18 is not aligned, as shown in FIGS. 9A and 10 in the state after crimping, the first claw portion 33a located on the lower side of the first and second claw portions 33a and 33b. A gap is created between the bracket 18 and the bracket 18. For this reason, when the brazing materials 62, 63, 65, 66 on the surfaces of the cap 17 and the bracket 18 are melted, the bracket 18 (core material 64) is lowered by gravity as shown by the downward arrow in FIG. Since the support portion of the bracket 18 in the second claw portion 33b (the point at which force is applied to the second claw portion 33b) is displaced from the root side to the tip side of the second claw portion 33b, the second claw portion 33b is held. The force is reduced, and the second claw portion 33b is pushed and spread over the bracket 18 as shown by the horizontal arrow in FIG. 10, causing a positional deviation between the cap 17 and the bracket 18.

  On the other hand, when the bracket 18 is offset in the process shown in FIG. 7A as in the present embodiment, the brazing materials 62, 63, 65, 66 are as shown by the broken lines in FIG. Since the amount of lowering of the bracket 18 (core material 64) can be reduced even when melted, the positional deviation between the cap 17 and the bracket 18 during brazing can be suppressed.

  Furthermore, in this embodiment, as shown in FIG. 8, the thickness of the first and second claw portions 33a and 33b is set to the joint portion 17a (the portion of the cap 17 excluding the first and second claw portions 33a and 33b). It is thinner than the plate thickness. This is realized, for example, by pressing only the first and second claw portions 33a and 33b against the cap 17 having the same plate thickness as a whole. In this way, in this embodiment, the brazing filler metal layers 62 and 63 of the first claw portion 33a are made thinner than the brazing filler metal layers 62 and 63 of the joint portion 17a, so that the amount of brazing filler metal flowing out during brazing can be reduced. Can be kept to a minimum. As a result, the amount by which the bracket 18 is lowered can be reduced, and the positional deviation between the cap 17 and the bracket 18 during brazing can be suppressed.

  As described above, in the present embodiment, since the cap 17 is provided with the first and second claw portions 33a and 33b, the third component described in the column of the problem to be solved by the invention can be omitted. Since no hole is formed in the cap 17, it is possible to avoid the leakage of the refrigerant flowing in the first header tank 14.

  In the present embodiment, the hole 47 provided in the bracket 18 has an opening width 47a on the side of the facing recess 46 that is substantially equal to the width 38 of the second claw portion 33b, and on the side away from the recess 46. The opening width 47b has a taper shape larger than the width 38 of the second claw portion 33b.

  Here, the shape of the hole 47 may be a rectangular shape having a uniform dimension in the longitudinal direction of the tube 11 and substantially the same as the width 38 of the second claw portion 33b. Since the opening width 47b on the side away from 46 is larger than the width 38 of the second claw portion 33b, the second claw portion 33b can be easily inserted into the hole portion 47 when the cap 17 and the bracket 18 are assembled. . In the present embodiment, only the hole 47 has a tapered shape, but the recessed portion 46 may have a similar tapered shape.

  Further, in the present embodiment, the shape of the mounting portion 18b of the bracket 18 is substantially set so that the lowermost side of the mounting portion 18b of the bracket 18 is inclined rather than horizontal when the condenser 10 is integrally brazed. One side 45 of the trapezoid, that is, the two sides 44 and 45 facing each other in the direction substantially orthogonal to the core surface of the mounting portion 18 b of the bracket 18 is inclined with respect to the longitudinal direction of the first header tank 14.

  Here, in the posture when the condenser 10 is integrally brazed, when the side that is the lowermost end of the mounting portion 18b of the bracket 18 is horizontal, the molten brazing material collects around the side that becomes the lowermost end of the mounting portion 18b. End up. In this case, there arises a problem that the accumulated brazing material interferes with a fastening member such as a bolt or a washer attached to the attachment hole 41.

  On the other hand, according to the present embodiment, since the side that is the lowermost end of the attachment portion 18b is inclined, when the brazing material is melted, it melts to the lower side of both ends of the inclined side. It is possible to flow the brazing filler metal, and it is possible to prevent excess brazing filler metal from remaining on the side 45 which is the lowermost end of the mounting portion 18b.

(Second Embodiment)
FIG. 12 shows a part of the temporary fixing process of the cap 17 and the bracket 18 in the present embodiment. In the first embodiment, in the temporary fixing step of the cap 17 and the bracket 18, the bending step of the first and second claw portions 33a shown in FIG. 7B and the tip portions 36a and 36b shown in FIG. However, in this embodiment, these steps are performed simultaneously.

  Specifically, as shown in FIG. 12, the pressing direction of the caulking punch 53 against the first and second claw portions 33 a and 33 b is inclined in the vertical and horizontal directions in the drawing, that is, oblique to the bracket 18. The direction. In this way, it is also possible to simultaneously bend and crush the tip portions 36a and 36b of the first and second claw portions 33a.

(Third embodiment)
In FIG. 13, sectional drawing of the cap 17 and the bracket 18 in this embodiment is shown. FIG. 13 corresponds to a sectional view taken along line IV-IV in FIG.

  In the first embodiment, the deformed portions 36a and 36b are provided at the tips of the first and second claw portions 33a and 33b. However, in the present embodiment, as shown in FIG. 13, the first and second claw portions 33a. , 33b are provided with catch portions 71a and 71b. The hook portions 71a and 71b have a shape protruding in a direction intersecting the extending direction of the first and second claw portions 33a and 33b, and the ends of the first and second claw portions 33a and 33b are bent after assembly. It is not formed, but is formed when the cap part is manufactured.

  When the cap 17 (cap portion 17 a) and the bracket 18 are overlapped, the hook portions 71 a and 71 b are hooked on the bracket 18 in the direction in which the cap 17 is separated from the bracket 18. Are engaged.

  In the present embodiment, the hook portions 71a and 71b are provided in advance at the tips of the first and second claw portions 33a and 33b, so that when the cap 17 and the bracket 18 are overlapped, the first and second claw portions 33a. , 33b, and the temporary fixing of the cap 17 and the bracket 18 is completed without deforming the tip of 33b. Thereby, according to this embodiment, since the caulking process which deform | transforms the front end side of the 1st, 2nd nail | claw part 33a, 33b is unnecessary, an assembly process is simplified compared with 1st, 2nd embodiment. it can.

(Fourth embodiment)
In each of the above-described embodiments, as a temporary fixing structure between the cap 17 and the bracket 18, a structure in which the first and second claw portions 33 a and 33 b provided on the cap 17 are hooked on the bracket 18 is employed. Instead of the second claw portions 33a and 33b, a structure may be adopted in which a convex portion is provided on the cap 17, a press-fit portion into which the convex portion is press-fitted is provided on the bracket 18, and both are fitted.

  As a method of forming the convex portion provided on the cap 17, as in the first and second claw portions 33 a and 33 b described above, the plate material is processed so as to extend from the cap 17 toward the bracket 18, A method in which a part of the surface is recessed and a part of the other surface is inflated can be employed.

  On the other hand, the press-fit portion provided in the bracket 18 is a shape corresponding to the convex portion of the cap 17 and is a through hole penetrating the bracket 18 or a concave portion not penetrating. The through hole or the concave portion is slightly smaller than the convex portion of the cap 17 so that the convex portion of the cap 17 is press-fitted and fitted.

  In the present embodiment, the cap 17 and the bracket 18 are joined with the convex portion of the cap 17 pressed into the press-fit portion of the bracket 18 so that the convex portion is tightly fitted to the press-fit portion. ing.

  According to this, when the cap 17 and the bracket 18 are assembled, the cap 17 and the bracket 18 can be temporarily fixed only by press-fitting the convex shape portion, and the caulking process is not required. Compared with, the assembly process can be simplified.

(Other embodiments)
(1) In the first embodiment, as shown in FIG. 2 (b), the hole portion 47 into which the second claw portion 33b is inserted is provided in the bracket 18, but the hole portion 47 is not necessarily provided. . For example, if the joint 18a of the bracket 18 has a shape equivalent to the cap 17a of the cap 17, a recess equivalent to the recess 46 that receives the first claw 33a may be provided instead of the hole 47. Moreover, you may abbreviate | omit a recessed part.

  (2) In the first embodiment, the first and second claw portions 33a and 33b are provided on the cap 17 for temporarily fixing the cap 17 and the bracket 18. However, in terms of simply temporarily fixing, The number of claw portions may be one or three or more.

  (3) In each of the above embodiments, as a method for joining the cap 17 and the bracket 18, it is desired to employ integrated brazing that brazes the entire condenser 10 at one time. A method of brazing 17 and the bracket 18 may be employed, for example, torch brazing. Moreover, you may employ | adopt other joining methods, such as not only brazing but welding.

  (4) In each of the above-described embodiments, the joining between the cap 17 and the bracket 18 has been described. However, the present invention can also be applied to joining between other members. As members other than the cap 17, for example, the first and second header tanks 14, 15 in the case where the first and second header tanks 14, 15 are configured by joining ends of a plurality of plate-like members. The plate-shaped member (1st plate-shaped member) which comprises is mentioned. In short, the present invention can be applied to the joining of the first plate-like member forming a part of the tubular part and the second plate-like member joined to the outer surface of the first plate-like member.

It is a front view of the condenser 10 in 1st Embodiment of this invention. (A) is an enlarged view of region A1 in FIG. 1, and (b) is a top view of region A1. It is a side view when the area | region A1 part in FIG. 1 is seen from the left side in FIG. It is the IV-IV sectional view taken on the line in FIG. (A), (b), (c) is respectively the 1st side view of the cap 17 in FIG. 1, a top view, and a 2nd side view. (A), (b), (c) is respectively the 1st side view of the bracket 18 in FIG. 1, a top view, and a 2nd side view. FIG. 6 is a cross-sectional view showing a temporary fixing process between the cap 17 and the bracket 18. It is sectional drawing of the cap 17 and the bracket 18 of the state temporarily fixed. 7A is a cross-sectional view of the cap 17 and the bracket 18 after temporary fixing when the step shown in FIG. 7A is omitted, and FIG. 7B is a cross-sectional view of the cap 17 when brazed in that state. FIG. FIG. 10 is an enlarged view of the vicinity of the first and second claw portions 33a and 33b in FIG. FIG. 9 is an enlarged view of the vicinity of first and second claw portions 33a and 33b in FIG. It is sectional drawing which shows a part of temporary fix | stop process of the cap 17 and the bracket 18 in 2nd Embodiment. It is sectional drawing of the cap 17 and the bracket 18 in 3rd Embodiment.

Explanation of symbols

17 Cap 18 Bracket 33a First claw part 33b Second claw part 36a Deformation part 36b Deformation part

Claims (10)

A tubular part (14) constituting a flow path of a heat exchange fluid flowing in the heat exchange core (13);
A heat exchanger comprising a second plate member (18) joined to an outer surface of a first plate member (17) forming a part of the tubular part (14);
The first plate-like member (17) is formed integrally with the first plate-like member (17) and is joined to the first plate-like member of the second plate-like member (18). A claw portion (33a, 33b) of a length that the tip reaches on the second surface opposite to
Deformed portions (36a, 36b) deformed on the second surface are provided on the tip side of the claw portions (33a, 33b),
The heat exchanger according to claim 1, wherein the first plate member (17) and the second plate member (18) are joined in a state of being engaged by the deforming portions (36a, 36b). The second plate-like member (18) has a shape along the outer shape of the claw portions (33a, 33b), and is a recess (46) recessed inward from the end of the second plate-like member (18). Or it has a hole (47) that penetrates the second plate-like member (18),
The heat exchanger according to claim 1, wherein the claw portions (33a, 33b) are located in the concave portion (46) or the hole portion (47).   The concave portion (46) or the hole portion (47) has a width dimension equal to the outer dimension of the claw portion (33a, 33b) and a width dimension of the claw portion (33a, 33b). The heat exchanger according to claim 2, wherein the heat exchanger has a portion (47 b) larger than the outer dimension. A tubular part (14) constituting a flow path of a heat exchange fluid flowing in the heat exchange core (13);
A heat exchanger comprising a second plate member (18) joined to an outer surface of a first plate member (17) forming a part of the tubular part (14);
The first plate-like member (17) is formed integrally with the first plate-like member (17), and the first surface of the second plate-like member (18) joined to the first plate-like member. It has a claw portion (33a, 33b) of a length that the tip reaches on the second surface on the opposite side,
The first plate member (17) is caught on the second plate member (18) in the direction away from the second plate member (18) on the tip side of the claw portions (33a, 33b). Shaped hooks (71a, 71b) are provided,
The heat exchanger according to claim 1, wherein the first plate member (17) and the second plate member (18) are joined in a state of being engaged by the catch portions (71a, 71b). A tubular part (14) constituting a flow path of a heat exchange fluid flowing in the heat exchange core (13);
A heat exchanger comprising a second plate member (18) joined to an outer surface of a first plate member (17) forming a part of the tubular part (14);
The first plate member (17) has a convex portion formed integrally with the first plate member (17),
The second plate member (18) has a press-fit portion into which the convex portion is press-fitted,
The first plate member (17) and the second plate member (18) are joined in a state where the convex portion and the press-fit portion are fitted to each other. . The first plate-like member is a cap (17) that closes an opening of the tubular part (14),
The heat exchanger according to any one of claims 1 to 5, wherein the second plate-shaped member is a bracket (18) for attaching the heat exchanger to a counterpart structure. The bracket (18) includes a joint portion (18a) joined to the cap (17), and a flat plate-like attachment portion (18b) formed with attachment holes (41) for attachment to the counterpart structure. Have
The mounting portion (18b) has a quadrangular shape that is substantially orthogonal to the core surface of the heat exchange core portion (13), and two sides (44, 45) that face each other in a direction substantially orthogonal to the core surface. The heat exchanger according to claim 6, wherein one of the two is inclined with respect to the core surface. The tubular part (14) constituting the flow path of the heat exchange fluid flowing in the heat exchange core (13) and the outer surface of the first plate member (17) forming a part of the tubular part (14) are joined. In the manufacturing method of a heat exchanger provided with a 2nd plate-shaped member (18),
Preparing the first plate-like member (17) and the second plate-like member (18);
An assembly step of assembling the first plate-like member (17) and the second plate-like member (18);
A joining step of joining the first plate member (17) and the second plate member (18) after assembly;
In the step of preparing the first plate member (17) and the second plate member (18), the first plate member (17) is formed integrally with the first plate member (17). 17) and the second plate-like member (18) are assembled on the second plate-like member (18) opposite to the first surface that contacts the first plate-like member (17). The first and second claw portions (33a, 33b) having a length that the tip reaches on the two surfaces are provided, and the first and second claw portions (33a, 33b) are the first plate-like member (17). And preparing the first plate-like member (17) disposed at positions facing each other,
In the assembly process,
An overlapping step of overlapping the first plate member (17) and the second plate member (18);
After the overlapping step, the first and second claw portions (33a, 33b) existing on the second surface of the second plate member (18) are deformed to deform the first portion. An engagement step of engaging the plate-like member (17) with the second plate-like member (18),
In the joining step, the first plate-like member (17) and the second plate-like member (18) are installed with the arrangement direction of the first and second claw portions (33a, 33b) as the vertical direction. A method of manufacturing a heat exchanger, characterized by joining at a temperature.   The assembling step is performed between the first and second claw portions (33a, 33b) between the overlapping step and the engaging step with respect to the one (33a) positioned below in the joining step. The method for manufacturing a heat exchanger according to claim 8, further comprising a step of bringing the end of the second plate-like member (18) closer. The step of preparing the first plate-like member (17) and the second plate-like member (18)
A step of forming the first plate-like member (17) having a predetermined shape having the first and second claw portions (33a, 33b) using a metal plate having a brazing material layer on the surface and a uniform plate thickness. When,
After the step of forming the first plate-like member (17), the first and second claw portions are formed by pressing the one of the first and second claw portions (33a, 33b). The thickness of the one (33a) of (33a, 33b) is made thinner than the thickness of the first plate-like member (17) other than the first and second claw portions (33a, 33b). The method for manufacturing a heat exchanger according to claim 8 or 9, characterized by comprising:

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