JP2009216287A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger can reduce manufacturing costs and weight. <P>SOLUTION: A condenser as the heat exchanger includes a pair of header tanks 2 composed of a material having a brazing filler metal layer on its outer face, a plurality of flat heat exchange tubes 4 disposed between both header tanks 2 and brazed to the header tanks 2, 3 at both end portions, and corrugated fins respectively disposed between the adjacent heat exchange tubes 4 and brazed to the heat exchange tubes 4. The heat exchange tube 4 has upper and lower walls and two sidewalls 15 disposed over both side edges of the upper and lower walls, and is formed by bending a metal blank sheet. The rear sidewall 15 is formed by combining a plurality of sidewall forming portions 19, 22 integrally molded, to side edge portions of the upper and lower walls. The third sidewall forming portion 22 at the outermost side is removed at a part between a brazing portion at a side closest to the header tank 2 among the plurality of brazing portions of the heat exchange tube 4 and the corrugated fins, and the header tank 2 to form a removed section 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger, and more particularly, to a heat exchanger used as a condenser, an evaporator, a heater core, an automobile oil cooler, an automobile radiator, and the like of a car air conditioner.

  In this specification, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  For example, as a heat exchanger used in a condenser of a car air conditioner of a vehicle, a pair of header tanks formed of a material having a brazing filler metal layer on the outer surface and arranged at intervals from each other, A plurality of flat heat exchange tubes that are spaced in the length direction of the header tank and arranged in the width direction in the ventilation direction, and whose both ends are brazed to the header tank, and the width of the heat exchange tube in the ventilation direction And a corrugated fin that is disposed between adjacent heat exchange pipes and brazed to the heat exchange pipes is widely used.

  The heat exchanger tube of the heat exchanger is required not only to have excellent heat exchange efficiency but also to have pressure resistance because a high-pressure gas refrigerant is introduced into the heat exchanger tube. Moreover, in order to reduce the size of the condenser, it is required that the tube wall of the heat exchange tube is thin and the tube height is low.

  As a heat exchanging tube excellent in heat exchanging efficiency used for the above-mentioned condenser, the present applicant has previously made two pairs of two flat walls provided across a pair of flat walls facing each other and both side edges of both flat walls. And the first side wall is formed by combining a plurality of side wall forming portions integrally formed on the side edges of the two flat walls, and the second side wall is formed integrally with the two flat walls. The first side wall is formed at the side edge of the first flat wall and protrudes toward the second flat wall, and the first side wall forming part is located at the middle of the height of the first side wall; A second side wall forming portion that is formed on the side edge of the flat wall and protrudes toward the first flat wall side, and whose tip is located at the middle of the height of the first side wall and is abutted against the tip of the first side wall forming portion And the first flat side wall of the first side wall forming part formed on the outer side in the width direction of the heat exchange tube. A third side wall forming portion protruding toward the second flat wall side and having a front end engaged with a side edge portion of the outer surface of the second flat wall, the front end portions of the first and second side wall forming portions; The heat exchange pipe | tube with which the outer surface of the 2nd side wall formation part and the 3rd side wall formation part and the 3rd side wall formation part and the side edge part of the 2nd flat wall were brazed was proposed (refer patent document 1).

  The heat exchange tube described in Patent Document 1 is composed of a single metal plate as a whole, two flat wall forming portions, a connecting portion that integrally connects both flat wall forming portions and forms a second side wall, The first and second side wall forming portions provided on the side edge opposite to the connecting portion in the flat wall forming portion so as to protrude from the flat wall forming portion, and the connecting portion in the first flat wall forming portion. A plate for manufacturing a heat exchange tube provided with an extension for a third side wall forming part provided by extending the opposite side edge is bent into a hairpin shape on both sides of the connecting part, and the first and first A second side wall forming part is abutted with each other; a third side wall forming part extension part is bent so as to cover the outer surfaces of the first and second side wall forming parts to form a third side wall forming part; Engage the tip of the side wall forming part with the side edge of the outer surface of the second flat wall forming part Making the bent body, and the first side wall forming portion and the second side wall forming portion of the bent body, the first and second side wall forming portions and the third side wall forming portion, and the third side wall forming portion and the second flat wall. It is manufactured by simultaneously brazing the forming part. The heat exchange tube of Patent Document 1 is provided with the first side wall forming portion and the second side wall forming portion, and the first and second side wall forming portions in the bent body described above, simultaneously with brazing of other components at the time of manufacturing the heat exchanger. And the third side wall forming part, and the third side wall forming part and the second flat wall forming part are simultaneously brazed. And in the manufactured heat exchange pipe, it consists of a brazing part between the 2nd flat wall which consists of a 2nd flat wall formation part, and the front-end | tip part of the 3rd side wall formation part in a 1st side wall, and is length direction There will be a seam that extends.

By the way, in the bending body mentioned above for manufacturing the heat exchange tube of patent document 1, it is in the length direction of a bending body between the front-end | tip part of a 3rd side wall formation part, and the outer surface of a 2nd flat wall formation part. There will be a stretch seam. In addition, this seam may be a shallow groove shape. Therefore, when manufacturing the heat exchanger, the molten brazing filler metal melted from the header tank body material flows along the seam due to the capillary phenomenon, and is bent along the contact portion between the bent body and the corrugated fin. It flows in the width direction of the body. As a result, it is necessary to increase the amount of brazing filler metal covering the outer surface of the header tank body material, which increases the material cost, and consequently increases the manufacturing cost of the heat exchanger and increases the weight of the heat exchanger. There is a problem.
JP 2006-78163 A

  An object of the present invention is to provide a heat exchanger that can solve the above-described problems and can reduce manufacturing costs and weight.

  In order to achieve the above object, the present invention comprises the following aspects.

  1) A pair of header tanks formed of a material having a brazing filler metal layer on the outer surface and spaced apart from each other, and a distance in the length direction of the header tank and a width direction between the header tanks. Corrugated fins that are arranged in the direction of ventilation and that are brazed to the heat exchange pipes between the flat heat exchange pipes that are brazed to the header tank at both ends and adjacent heat exchange pipes The heat exchange tube has a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls and bends the metal base plate And one side wall is formed by combining a plurality of side wall forming portions formed integrally with the side edges of both flat walls, and the outermost side wall forming portion is formed integrally with one flat wall. Beyond Parts is a heat exchanger that is engaged with the one side edge portion of the outer surface of the other flat wall, the heat exchanger at least a portion of the outermost side wall forming portion of the heat exchange tubes are removed.

  2) The removal part of the outermost side wall forming part in the heat exchange pipe is formed between the brazing part on the most header tank side and the header tank among the brazing parts at a plurality of locations of the heat exchange pipe and the corrugated fin. The heat exchanger as described in 1) above.

  3) When the dimension in the length direction of the heat exchange tube in the removal portion of the outermost side wall forming portion of the heat exchange tube is L1 mm and the thickness of the outermost side wall forming portion is tmm, the above 2) satisfying the relationship 2t ≦ L1 The described heat exchanger.

  4) The outermost side wall forming part in the heat exchange pipe is a part of the heat exchange pipe from the part between the brazing part on the header tank side and the header tank among the brazed parts of the heat exchange pipe and the corrugated fin. The heat exchanger as described in 1) above, wherein a removal part is formed by removing all the ends.

  5) The distance between the inner end in the length direction of the heat exchange pipe and the header tank in the removal part of the outermost side wall forming part of the heat exchange pipe is L2 mm, the thickness of the outermost side wall forming part is tmm, the outer surface of the header tank and the heat 4. The heat exchanger as described in 4) above, wherein the length in the length direction of the heat exchange pipe in the fillet formed between the exchange pipes is amm and satisfies the relationship t + a ≦ L2.

  6) The first side wall of the heat exchange tube is formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls, and the second side wall is also formed integrally with both flat walls, Two flat wall forming parts, a connecting part that integrally connects both flat wall forming parts and forms a second side wall, and a side wall provided on a side edge of the two flat wall forming parts opposite to the connecting part A plurality of side wall forming parts after obtaining a bent body by bending a plate for manufacturing a heat exchange pipe having a forming part into a hairpin shape at a connecting part and caulking all side wall forming parts in combination The heat exchange pipe is made by brazing, and at least a part of the outermost side wall forming part among the plurality of side wall forming parts forming the first side wall of the heat exchange pipe is removed 1) To 5).

  7) The first side wall of the heat exchange tube is integrally formed at the edge of each flat wall opposite to the second side wall so as to protrude toward the other flat wall, and the tips are brazed together. The first and second side wall forming portions are formed integrally with the outer side in the width direction of the heat exchange tube than the first and second side wall forming portions of either one of the flat walls, and the first and second side wall forming portions are formed. The first end is brazed to an inclined surface inclined toward the one flat wall toward the outer side in the width direction of the heat exchange tube at the side edge of the other flat wall outer surface. The heat exchanger as described in 6) above, wherein the heat exchanger comprises three side wall forming portions, and at least a part of the third side wall forming portion is removed.

  According to the heat exchanger of 1) above, since at least a part of the outermost side wall forming part of the heat exchange pipe is removed, the outermost side wall forming part is formed in the removed part of the outermost side wall forming part. There is no seam formed by the engagement of the tip of the outermost side wall forming portion with the other flat wall that is not, and the bent body for manufacturing a heat exchange tube formed by bending the metal base plate In the removed portion of the outermost side wall forming portion, there is no seam forming the seam portion. Therefore, the material for forming the header tank at the time of manufacturing the heat exchange pipe from the bent body obtained by bending the metal base plate at the time of manufacturing the heat exchanger, and at the same time brazing the header tank, the manufactured heat exchange pipe and the corrugated fin Even if the molten brazing filler metal melted out of the metal flows along the seam forming the seam portion in the bent body by capillary action, the capillary phenomenon disappears in the removed portion of the outermost side wall forming portion, and the molten brazing material flows. Is stopped. As a result, the amount of brazing material covering the outer surface of the material forming the header tank of the heat exchanger can be reduced, the material cost can be reduced, the manufacturing cost of the heat exchanger can be reduced, and the weight can be reduced. Can be achieved.

  According to the heat exchanger of the above 2), the heat exchanger tube is manufactured from the bent body obtained by bending the metal base plate at the time of manufacturing the heat exchanger, and the header tank, the manufactured heat exchanger tube and the corrugated fin are collectively brazed. At the time of attaching, it is possible to minimize the length of the flow along the seam of the bent body of the molten brazing material melted from the material forming the header tank, and the molten solder melted from the material forming the header tank. It is possible to reliably prevent the material from flowing in the width direction of the bent body along the contact portion between the bent body forming the heat exchange tube and the corrugated fin.

  According to the heat exchanger of the above 3), the heat exchanger tube is manufactured from the bent body obtained by bending the metal base plate at the time of manufacturing the heat exchanger, and the header tank, the manufactured heat exchanger tube and the corrugated fin are collectively brazed. At the time of attachment, the flow along the seam of the bent body of the molten brazing material melted out from the material forming the header tank can be effectively stopped.

  According to the heat exchanger of the above 4), the heat exchanger tube is manufactured from a bent body obtained by bending the metal base plate at the time of manufacturing the heat exchanger, and the header tank, the manufactured heat exchanger tube and the corrugated fin are collectively brazed. At the time of attaching, it is possible to minimize the length of the flow along the seam of the bent body of the molten brazing material melted from the material forming the header tank, and the molten solder melted from the material forming the header tank. It is possible to reliably prevent the material from flowing in the width direction of the bent body along the contact portion between the bent body forming the heat exchange tube and the corrugated fin.

  According to the heat exchanger of the above 5), the heat exchanger tube is manufactured from the bent body obtained by bending the metal base plate at the time of manufacturing the heat exchanger, and the header tank, the manufactured heat exchanger tube and the corrugated fin are collectively brazed. At the time of attachment, the flow along the seam of the bent body of the molten brazing material melted out from the material forming the header tank can be effectively stopped.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger according to the present invention is applied to a condenser of a car air conditioner using a chlorofluorocarbon refrigerant.

  In the following description, the top and bottom, left and right in FIG. 1 are referred to as top and bottom and left and right, and the downstream side in the ventilation direction (the direction indicated by the arrow X in FIG. 1, the right side in FIGS. 3 and 4) is the front and the opposite side. Let's call it after.

Embodiment 1
This embodiment is shown in FIGS. In addition, in FIGS. 1-7 which show the capacitor | condenser of Embodiment 1, illustration of the brazing material of all the brazing parts is abbreviate | omitted.

  FIG. 1 shows the overall configuration of a car air conditioner capacitor to which a heat exchanger according to the present invention is applied, and FIGS. 8 and 9 show a method for manufacturing a heat exchange tube used for a capacitor.

  1 to 3, a capacitor for a car air conditioner (1) includes a pair of aluminum header tanks (2) (3) extending in the vertical direction and spaced apart in the left-right direction, and both header tanks ( 2) A plurality of aluminum flat-shaped heats with the width direction facing the ventilation direction between (3) and spaced apart in the vertical direction, and both ends brazed to both header tanks (2) (3) Aluminum corrugated fin brazed to the heat exchange pipe (4) between the exchange pipe (4) and the adjacent heat exchange pipes (4) and outside the heat exchange pipes (4) at both upper and lower ends (5) and an aluminum side plate (6) disposed outside the corrugated fins (5) at both upper and lower ends and brazed to the corrugated fins (5).

  The left header tank (2) is divided into two upper and lower header parts (2a) and (2b) by a partition member (7) above the central part in the height direction, and the right header tank (3) is The upper and lower header parts (3a) and (3b) are partitioned by a partition member (7) below the central part. A fluid inlet (not shown) is formed in the upper header portion (2a) of the left header tank (2), and an inlet member (8) having a fluid inflow path (8a) leading to the fluid inlet is connected to the upper header portion (2a). It is attached. In addition, a fluid outlet (not shown) is formed in the lower header portion (3b) of the right header tank (3), and an outlet member (9) having a fluid outflow passage (9a) communicating with the fluid outlet is provided in the lower header portion (3b). It is brazed.

  The left and right header tanks (2) and (3) are made of an aluminum pipe having a brazing filler metal layer on at least the outer surface, for example, a base plate made of an aluminum brazing sheet having a brazing filler metal layer on both sides is formed into a cylindrical shape, and both side edges Is composed of brazed pipes that are partially overlapped and brazed to each other, and have a plurality of pipe insertion holes (10) that are long in the front-rear direction, and a header tank body (11) at both ends of the header tank body (11). It consists of an aluminum closing member (12) that is brazed to close the opening at both ends.

  As shown in detail in FIG. 4 and FIG. 5, the heat exchange pipe (4) is made of aluminum and has flat upper and lower walls (13), (14) (a pair of flat walls) facing each other and having the same thickness. And a rear side wall formed by combining a plurality of side wall forming portions integrally formed on the rear side edge portions of the upper and lower walls (13) and (14) and straddling the rear side edges of the upper and lower walls (13) and (14). (15) (first side wall) and front side wall (16) (second side wall) straddling the front edges of the upper and lower walls (13) and (14) and integrally formed with the upper and lower walls (13) and (14) A plurality of reinforcing walls (17) extending between the side walls (15), (16) across the upper and lower walls (13), (14) and spaced apart from each other and extending in the longitudinal direction, And a plurality of fluid passages (18) arranged in parallel. Although not shown in the figure, all the reinforcing walls (17) are provided with a plurality of communication holes through which the adjacent fluid passages (18) pass so as to form a staggered arrangement as viewed from above. Yes.

  The rear side wall (15) is formed integrally with the first side wall forming part (19) formed integrally with the upper wall (13) (first flat wall) and the lower wall (14) (second flat wall). The second side wall forming part (21) and the third side wall forming part (22) (outermost side wall forming part) are combined and brazed.

  The first side wall forming portion (19) is integrally formed in a downward projecting manner on the rear edge of the upper wall (13). The second side wall forming part (21) is integrally formed on the rear edge of the lower wall (14) so as to protrude upward, and the first side wall forming part (21) is in a state where the front end is abutted with the front end of the first side wall forming part (19). The side wall forming part (19) is brazed. The tip portions of the first and second side wall forming portions (19) and (21) are butted against each other. That is, the tip end portion of the first side wall forming portion (19) of the upper wall (13) is shaped such that the rear half portion is cut off, and the second side wall forming portion (21) of the lower wall (14). The front end of the first side wall is shaped such that the front half is cut off, and the protrusion (19a) of the first side wall forming part (19) is in the cut out part (21b) of the second side wall forming part (21). The projecting portion (21a) of the second side wall forming portion (21) is fitted into the notched portion (19b) of the first side wall forming portion (19).

  The third side wall forming part (22) is integrally formed on the rear edge of the upper wall (13) in a downward projecting manner on the rear side of the second side wall forming part (21), and is formed as a first and second side wall. Formed along the outer surface of the forming portion (19) (21), the tip thereof is formed on the inclined surface (23) formed at the rear edge of the outer surface of the lower wall (14) and inclined upward toward the rear. In an engaged state, it is brazed to the entire outer surface of the first and second side wall forming portions (19) and (21) and the inclined surface (23) of the upper wall (13). And on the lower surface of the heat exchange pipe (4) to which the corrugated fin (5) is brazed, the tip of the third side wall forming part (22) and the inclination direction of the inclined surface (23) of the upper wall (13) A seam portion (24) formed between the upper end portion and formed by a brazing portion extending in the length direction of the heat exchange pipe (4) exists over the entire length. Note that the seam portion (24) may have a shallow groove shape.

  The reinforcing wall (17) is a reinforcing wall projection (25) (26) integrally formed in a raised shape below the upper wall (13) and a reinforcing wall integrally formed in a raised shape above the lower wall (14). The projecting ridges (27) and (28) are formed by brazing the tips with each other being butted together. On the upper wall (13) and lower wall (14), two types of reinforcing wall projections (25) (26) and (27) (28) with different thicknesses are formed alternately in the front-rear direction. The thick reinforcing wall ridges (25) on the upper wall (13) and the thin reinforcing wall ridges (28) on the lower wall (14) are brazed, and the upper wall (13) The thin reinforcing wall projection (26) and the thick reinforcing wall projection (27) on the lower wall (14) are brazed. Hereinafter, the thick reinforcing wall ridges (25) and (27) on both the upper and lower walls (13) and (14) are referred to as first reinforcing wall ridges, respectively, and the thin reinforcing wall ridges (26) ( 28) shall be called the second reinforcing wall projections. The first reinforcing wall projections (25) and (27) of the upper and lower walls (13) and (14) are respectively extended in the length direction thereof and the second reinforcing wall of the other wall (14) and (13). Concave grooves (29) and (31) into which the tips of the convex protrusions (28) and (26) are fitted are formed over the entire length. And the front-end | tip part of the 2nd reinforcement wall protruding item | line (28) of a lower wall (14) is in a lower wall (in the groove | channel (29) of the protruding item | line (25) of the 1st reinforcement wall member of an upper wall (13). 14) In the state where the tip of the second reinforcing wall projection (26) of the upper wall (13) is press-fitted into the groove (31) of the first reinforcing wall projection (27) of 14), both reinforcements Wall ridges (25) (28) and (26) (27) are brazed.

  As shown in detail in FIGS. 6 and 7, the left and right ends of the heat exchange pipe (4) are pipe insertion holes (10) formed in the header tank bodies (11) of the left and right header tanks (2) and (3). ) Is brazed to the header tank body (11) of both header tanks (2) and (3). And at least one part of the 3rd side wall formation part (22) of a heat exchange pipe (4) is removed, and the removal part (30) is formed. Here, the third side wall forming portion (22) is provided at the left and right ends (most on the header tank (2) (3) side) of the brazed portions of the heat exchange pipe (4) and the corrugated fin (5). It is formed between the brazing part (5a) and both header tanks (2) (3). Further, the length in the length direction of the heat exchange pipe (4) in the removal part (30) of the third side wall forming part (22) of the heat exchange pipe (4) is L1 mm, and the thickness of the third side wall forming part (22) is set. When tmm is satisfied, it is preferable that the relationship 2t ≦ L1 is satisfied.

  The capacitor (1) is manufactured by the method described below.

  First, a pair of aluminum header tank body material having at least a brazing filler metal layer on the outer surface, a closing member (12), a plurality of aluminum corrugated fins (5), an aluminum side plate (6), an inlet member (8), And an outlet member (9). A plurality of pipe insertion holes (10) are formed in the header tank body material.

  Further, a bent body (40A) for making the heat exchange pipe (4) is obtained by the method described below using the plate (40) for producing the heat exchange pipe shown in FIG.

  The plate for heat exchange pipe production (40) is formed by rolling a rolling base plate made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the upper and lower walls (13) (14). Flat upper wall forming part (41) (flat wall forming part) and lower wall forming part (42) (flat wall forming part) having the same width and the same thickness as each other, and upper and lower wall forming part (41) (42) The connecting part (43) that connects the two together and forms the front side wall (16), and the side opposite to the connecting part (43) in the upper wall forming part (41) and the lower wall forming part (42) First and second side wall forming portions (19) and (21) which are integrally formed in a raised shape above the side edges of the first side wall and form a rear side wall (15), and a connecting portion (43) in the upper wall forming portion (41). Is the third side wall forming part extension (44) formed by extending the opposite side edge outward in the front-rear direction, and the upper wall forming part (41) and the lower wall forming part (42), respectively. Predetermined intervals in the direction And a plurality of first and second reinforcing wall projections (25), (26), (27) and (28) integrally formed in an upwardly protruding shape, and the first wall forming portion (41) has a first Reinforcement wall ridges (25) and lower wall formation part (42) second reinforcement wall ridges (28), and lower wall formation part (42) first reinforcement wall ridges (27) and upper wall The second reinforcing wall ridges (26) of the forming part (41) are in positions that are symmetric in the front-rear direction with respect to the center line in the front-rear direction of the connection part (43).

  Of the brazed portions of the heat exchange pipe (4) and the corrugated fin (5) in the third side wall forming portion extension (44), the brazed portions (5a) at both the left and right ends and both header tanks (2) A portion to be positioned between (3) is removed over a predetermined length to form a removal portion (30).

  An inclined surface (23) inclined upward in the width direction outward is formed at the edge of the lower surface of the lower wall forming portion (42) on the second side wall forming portion (21) side. The first and second side wall forming portions (19) and (21) of the upper and lower wall forming portions (41) and (42) are respectively provided with a protruding portion (19a) (21a) and a notch portion (19b) (21b) at the tip portion. A projecting part (19a) of the first side wall forming part (19) of the upper wall forming part (41) and a notch part (21b) of the second side wall forming part (21) of the lower wall forming part (42). ), And a cutout portion (19b) of the first side wall forming portion (19) of the upper wall forming portion (41) and a protruding portion (21a) of the second side wall forming portion (21) of the lower wall forming portion (42) Are symmetric with respect to the center line in the width direction of the connecting portion (43). A concave groove (29) into which the second reinforcing wall protrusion (28) of the lower wall forming part (42) is press-fitted into the front end surface of the first reinforcing wall protrusion (25) of the upper wall forming part (41). A recessed groove (2) in which the second reinforcing wall ridge (26) of the upper wall forming portion (41) is press-fitted into the tip surface of the first reinforcing wall ridge (27) of the lower wall forming portion (42). 31) is formed.

  In addition, by rolling a rolling base plate made of an aluminum brazing sheet provided with a brazing material layer on both sides, an upper wall forming part (41), a lower wall forming part (42), a connecting part (43), a first and a second The second side wall forming portions (19), (21), the third side wall forming portion extension (44), and the reinforcing wall ridges (25) (26) (27) (28) are integrally formed. The entire side except for the side surface of the second side wall forming portion (22) of the lower wall forming portion (42) and the tip end surface of the third side wall forming portion extension (44) is covered with a brazing material layer.

  Further, in the above, the rolling base plate is composed of an aluminum brazing sheet provided with a brazing material layer on both sides, but is not limited thereto, and the brazing material is formed on one side of a core material made of an Al-Mn alloy. It may be made of an aluminum brazing sheet provided with a layer and provided with a sacrificial corrosion layer made of an Al—Zn alloy on the other surface. In this case, the brazing material layer surface is the surface on which the first and second side wall forming portions (19), (21) and the reinforcing wall projections (25), (26), (27), (28) are formed.

  Then, as shown in FIG. 9, the plate (40) for manufacturing the heat exchange tube is sequentially bent on the left and right sides of the connecting portion (43) by roll forming (see FIG. 9 (a)), and finally. Folded into a hairpin shape to fit the protrusions (19a) and (21a) of the first and second side wall forming portions (19) and (21) with the notch portions (21b) and (19b), and the convexity for the second reinforcing wall The tips of the strips (26) and (28) are press-fitted into the concave grooves (31) and (29) of the first reinforcing wall projections (27) and (25).

  Next, the third side wall forming portion extension 44 is bent so that it extends along the outer surfaces of the first and second side wall forming portions 19, 21, and the tip portion thereof is the upper wall forming portion 22. The third side wall forming portion (22) is made to engage with the inclined surface (23) of the first to obtain a bent body (40A) (see FIG. 9 (b)). Here, in the bent body (40A), the distal end portion of the third sidewall forming portion (22) and the outer surface of the lower wall forming portion (42), that is, the distal end portion and the inclined surface (23) of the third sidewall forming portion (22). A seam (45) extending in the length direction of the bent body (40A) exists between the upper end portion in the inclination direction.

  Next, a pair of header tank body materials are arranged at intervals, and closing members (12) are arranged at both ends of both header tank body materials. Further, the folded bodies (40A) and the fins (5) are alternately arranged, and both ends of the folded body (40A) are inserted into the pipe insertion holes (10) of the header tank body material. At this time, the removal part (30) of the third side wall forming part (22) of the bent body (40A) is the most header tank body material among the contact parts of the bent body (40A) and the corrugated fin (5). It is located between the contact part on the side and both header tank body materials.

  Further, a side plate (6) is disposed outside the corrugated fins (5) at both ends, and an inlet member (8) and an outlet member (9) are further disposed. Thereafter, these are heated to a predetermined temperature, the tip portions of the first and second side wall forming portions (19) and (21) are brazed to each other, and the third side wall forming portion (24) is fixed to the first and second side portions. The rear side wall (15) is formed by brazing the outer surface of the side wall forming portions (19) and (21) and the inclined surface (23) of the upper wall (13). Further, the reinforcing wall (17) is formed by brazing the tip portions of both reinforcing wall projections (25) (28) and (26) (27) using the brazing material layer, and the connecting portion The front wall (16) is formed by (43), the upper wall (13) is formed by the upper wall forming portion (41), and the lower wall (14) is formed by the lower wall forming portion (42). (4) is manufactured. At the same time, the header tank body (11) is manufactured from the header tank body material, and the header tank (2) (3) is manufactured by the header tank body (11) and the closing member (12). 4) and header tank (2) (3), heat exchange pipe (4) and corrugated fin (5), corrugated fin (5) and side plate (6), and header tank (2) (3) and inlet member ( 8) Braze (9) and the outlet member simultaneously. Thus, the capacitor (1) is manufactured.

  Since the removal part (30) is formed in the third side wall forming part (22) of the heat exchange pipe (4) when all the components are brazed at the time of manufacturing the capacitor (1) described above, the header tank Even if the molten brazing material melted from the main body material flows along the seam (45) due to the capillary phenomenon, the capillary phenomenon disappears in the removal part (30), and the inner side in the left-right direction than the removal part (30). The flow of the molten brazing material is stopped. Therefore, the molten brazing material is prevented from flowing along the contact portion between the heat exchange pipe (4) and the corrugated fin (5). As a result, it becomes possible to reduce the amount of brazing material covering the outer surface of the material forming the header tank (2) (3), the material cost can be reduced, and the manufacturing cost of the capacitor (1) can be reduced. At the same time, the weight of the capacitor (1) can be reduced.

Embodiment 2
This embodiment is shown in FIG. 10 and FIG.

  10 and 11 show the main part of the capacitor of the second embodiment.

  In the case of the capacitor shown in FIGS. 10 and 11, the third side wall forming part (22) of the heat exchange pipe (4) is a brazing part of a plurality of places of the heat exchange pipe (4) and the corrugated fin (5). It is removed from the part between the brazed part of the left and right ends (most header tank (2) (3) side) and the outer surface of the header tank body (11) of both header tanks (2) and (3) from the left and right ends, Thereby, the removal part (50) is formed. The length of the pipe insertion hole (51) formed in the header tank body (11) of both header tank bodies (2) and (3) is determined by the removal part (50) of the heat exchange pipe (4). It is equal to the width of the formed part. Reference numeral (F) denotes a fillet formed between the outer surface of the header tank body (11) of the header tanks (2) and (3) and the heat exchange pipe (4). The illustration of the brazing material other than the fillet (F) is omitted.

  Here, the distance between the left and right inner ends of the removal portion (50) of the third side wall forming portion (22) of the heat exchange pipe (4) and the outer surface of the header tank body (11) is L2 mm, and the third side wall forming portion ( 22) The thickness of tmm, the heat exchange pipe (4) in the fillet (F) formed between the outer surface of the header tank body (11) of the header tank (2) (3) and the heat exchange pipe (4) When the dimension in the length direction is amm, it is preferable that the relationship t + a ≦ L2 is satisfied.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole perspective view which shows Embodiment 1 of the capacitor | condenser to which the heat exchanger of this invention is applied. It is a horizontal sectional view which expands and shows the portion of the left header tank of the capacitor of FIG. It is the sectional view on the AA line of FIG. FIG. 2 is an enlarged vertical sectional view showing a portion of a heat exchange tube of the capacitor in FIG. 1. It is a principal part enlarged view of the heat exchange pipe | tube of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is the BB sectional view taken on the line of FIG. It is a front view of the plate for a heat exchange tube manufacturing used for manufacturing the heat exchange tube of the capacitor | condenser of FIG. It is a figure which shows a part of process of manufacturing the heat exchange pipe | tube of the capacitor | condenser of FIG. It is a figure equivalent to FIG. 6 which shows the principal part of Embodiment 2 of the capacitor | condenser to which the heat exchanger of this invention is applied. It is a figure equivalent to FIG. 3 which shows the principal part of Embodiment 2 of the capacitor | condenser to which the heat exchanger of this invention is applied.

Explanation of symbols

(1): Capacitor (heat exchanger)
(2) (3): Header tank
(4): Heat exchange pipe
(5): Corrugated fin
(5a): Brazing part
(13): Upper wall (flat wall)
(14): Lower wall (flat wall)
(15): Rear side wall (first side wall)
(16): Front side wall (second side wall)
(19): First side wall forming part
(21): Second side wall forming part
(22): Third side wall forming part
(23): Inclined surface
(30) (50): Removal part
(40): Plate for heat exchanger tube production
(40A): Folded body
(41): Upper wall forming part
(42): Lower wall forming part
(43): Connection part

Claims (7)

A pair of header tanks formed of a material having a brazing filler metal layer on the outer surface and spaced apart from each other, and a distance in the length direction of the header tank between the header tanks and a ventilation direction in the width direction A plurality of flat heat exchange pipes that are disposed toward the opposite ends and brazed to the header tank, and corrugated fins that are disposed between adjacent heat exchange pipes and brazed to the heat exchange pipes. The heat exchange tube has a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls, and is formed by bending a metal base plate And one side wall is formed by combining a plurality of side wall forming portions integrally formed on the side edges of both flat walls, and the outermost side wall forming portion is formed integrally with one flat wall and its tip There a heat exchanger which is engaged with the one side edge portion of the outer surface of the other flat wall, the heat exchanger at least a portion of the outermost side wall forming portion of the heat exchange tubes are removed. The removal part of the outermost side wall forming part in the heat exchange pipe is formed between the brazing part on the most header tank side and the header tank among the brazing parts at a plurality of locations of the heat exchange pipe and the corrugated fin. Item 2. The heat exchanger according to Item 1. 3. The relationship according to claim 2, wherein the dimension of the heat exchange tube in the length direction in the removed portion of the outermost side wall forming portion of the heat exchange tube is L1 mm and the thickness of the outermost side wall forming portion is tmm. Heat exchanger. The outermost side wall forming part in the heat exchange pipe extends from the part between the brazing part on the most header tank side and the header tank to the both ends of the heat exchange pipe among the brazed parts at a plurality of positions of the heat exchange pipe and the corrugated fin. The heat exchanger according to claim 1, wherein a removal portion is formed by removing all of them. The distance between the inner end in the length direction of the heat exchange pipe and the header tank in the removal part of the outermost side wall forming part of the heat exchange pipe is L2 mm, the thickness of the outermost side wall forming part is tmm, the outer surface of the header tank and the heat exchange pipe 5. The heat exchanger according to claim 4, wherein a length in the length direction of the heat exchange pipe in the fillet formed between the first and second fillets satisfies a relationship of t + a ≦ L2. The first side wall of the heat exchange pipe is formed by combining a plurality of side wall forming parts integrally formed on the side edges of both flat walls, and the second side wall is also formed integrally with both flat walls. A flat wall forming part, a connecting part that integrally connects the two flat wall forming parts and forms the second side wall, and a side wall forming part that is provided on the side edge of the two flat wall forming parts opposite to the connecting part. After the plate-like body for manufacturing a heat exchange tube is bent into a hairpin shape at the connecting portion, and all the side wall forming portions are combined and caulked to obtain a bent body, the plurality of side wall forming portions are brazed. The heat exchange pipe is made by attaching | subjecting, At least one part of the outermost side wall formation part is removed among the several side wall formation parts which form the 1st side wall of a heat exchange pipe. The heat exchanger in any one of. A first side wall of the heat exchange pipe is integrally formed at the edge of each flat wall opposite to the second side wall so as to protrude toward the other flat wall, and the tips are brazed to each other. The first and second side wall forming portions are integrally formed on the outer side in the width direction of the heat exchange tube with respect to the first and second side wall forming portions of either one of the flat walls, and the first and second side wall forming portions A third side wall brazed to the outer surface and brazed to an inclined surface inclined to the one flat wall side toward the outer side in the width direction of the heat exchange tube at the side edge of the outer surface of the other flat wall The heat exchanger according to claim 6, comprising a forming portion, wherein at least a part of the third side wall forming portion is removed.

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