JP2013002772A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably braze an end of an end plate to an outer surface of a header tank without increasing the equipment cost and the man-hours, and to firmly connect the end plate and the header tank.SOLUTION: The heat exchanger 1 includes a core 10 having a tube 11 and a fin 12 alternately arranged, the header tank 20 connected to an end of the tube 11, and the end plate 40 disposed on the outer end of the arrangement direction of the tube 11 and the fin 12 of the core 10. A brazing part 44 extended to the header tank side compared to the core 10 and formed in such a manner of coming into contact with the outer surface of the header tank and brazed to the outer surface, and a bead 46 reinforcing the brazing part 44 are provided on the end plate 40.

Description

  The present invention relates to a heat exchanger used in, for example, a vehicle air conditioner and the like, and particularly belongs to the technical field of a structure in which an end plate is brazed to a header tank.

  Conventionally, as this type of heat exchanger, a core configured by alternately arranging a plurality of tubes and fins, a header tank provided at an end portion of the core tube to which the tube is connected, and a core tube And an end plate provided at the outer end in the arrangement direction of the fins are known (see Patent Documents 1 to 3).

  In Patent Document 1, the end plate is formed in a substantially U-shaped cross section having a pair of side plate portions. The end portions of the pair of side plate portions are formed so as to sandwich the header tank in the radial direction, and each is brazed to the outer surface of the header tank.

  In Patent Document 2, the end portion of the end plate has a bifurcated shape, and the bifurcated portion is brazed to the outer surface of the header tank with the header tank sandwiched in the radial direction.

  In Patent Document 3, as in Patent Document 1, both side plate portions of the end plate having a substantially U-shaped cross section are spot welded to the outer surface of the header tank and brazed.

  By brazing the end portion of the end plate to the outer surface of the header tank as in Patent Documents 1 to 3, it becomes possible to firmly join the end plate and the header tank, and the rigidity of the heat exchanger as a whole is increased. It can be improved.

JP 2008-304168 A JP 2002-213892 A JP 2002-323297 A

  By the way, when manufacturing the heat exchangers of Patent Documents 1 and 2, the header tank is sandwiched in the radial direction at the end of the end plate, and in this state, it is carried into a brazing furnace. At this time, since the end plate is heated until it reaches the melting temperature of the brazing material, the strength decreases, and the end plate may be deformed away from the outer surface of the header tank. In particular, when the posture of the heat exchanger in the furnace is such that one side plate portion of the end plate is positioned below the header tank, the side plate portion is directed downward (header by the influence of gravity). It tends to deform in the direction away from the outer surface of the tank. If the side plate portion of the end plate is separated from the header tank, a brazing failure between the end plate and the header tank occurs.

  Therefore, it can be considered that the side plate portion of the end plate is spot-welded to the header tank before being transferred into the furnace as in Patent Document 3.

  However, spot welding requires a welding facility, which increases the equipment cost and increases the number of steps.

  The present invention has been made in view of the above points, and the object of the present invention is to reliably braze the end portion of the end plate to the outer surface of the header tank without causing an increase in equipment cost and an increase in man-hours. The purpose is to firmly connect the end plate and the header tank.

  In order to achieve the above object, in the present invention, the end plate is provided with a reinforcing structure.

  According to a first aspect of the present invention, there is provided a core in which tubes and fins are alternately arranged, a header tank provided at a tube end portion of the core and connected to the tube end portion, and an outside of the core tube and fin arrangement direction. In the heat exchanger provided with an end plate provided at an end, the end plate extends to the header tank side from the core and is formed so as to contact the outer surface of the header tank. A brazed part to be brazed and a reinforcing part for reinforcing the brazed part are provided.

  According to this configuration, since the brazed portion of the end plate is reinforced by the reinforcing portion, deformation of the brazed portion is suppressed when heated in the brazing furnace. This allows the brazed part to remain in contact with the outer surface of the header tank, thus ensuring that the end plate is brazed to the outer surface of the header tank.

  Further, the rigidity of the end plate itself is increased by the reinforcing portion.

  According to a second aspect, in the first aspect, the end plate is attached with a fixing member for fixing the heat exchanger to the vehicle.

  According to this configuration, since the end plate of the heat exchanger is fixed to the vehicle via the fixing member, a large force is applied to the end plate. In this case, since the end plate is reinforced by the reinforcing portion and securely brazed to the header tank, and the rigidity of the end plate is increased, the deformation of the end plate can be reduced.

  According to a third invention, in the first or second invention, the end plate includes a bottom plate portion extending along an outer end portion of the core, and first and second side plate portions rising from both side edges of the bottom plate portion. The brazed portion is provided on the first and second side plate portions, and the reinforcing portion is constituted by a bead press-formed on the first and second side plate portions. It is characterized by being.

  According to this configuration, when the end plate is press-molded, the reinforcing portion can be obtained together, so that an increase in the number of steps due to the provision of the reinforcing portion can be avoided.

  According to a fourth aspect, in the third aspect, the bottom plate portion of the end plate is inserted into the header tank and brazed to the header tank.

  According to this configuration, the end plate and the header tank are more firmly coupled.

  According to a fifth invention, in any one of the first to fourth inventions, the header tank has a cylindrical shape extending in an arrangement direction of the tubes and fins, and the brazing portion extends along an outer surface of the header tank. A side portion extending in a circumferential direction to a portion corresponding to the central axis of the header tank, and an extension portion connected to the side portion and extending linearly to the opposite side of the header tank from the core side. It is characterized by this.

  According to this configuration, it is possible to braze the portion along the brazed portion over a wide range up to a portion corresponding to the central axis on the outer surface of the header tank. For example, when a manufacturing error occurs in the header tank or the end plate, the extension portion is connected to the side portion, so that the extension portion can be brought into contact with the outer surface of the header tank and brazed.

  A sixth invention is characterized in that, in any one of the first to fifth inventions, a brazing material is clad on an outer surface of the header tank or a contact surface of the end plate with the header tank. It is.

  According to this configuration, the end plate and the header tank are securely brazed.

  According to the first invention, since the reinforcing portion for reinforcing the brazing portion of the end plate is provided, the deformation of the brazing portion heated in the brazing furnace without performing spot welding of the brazing portion. Can be suppressed. Accordingly, the end plate can be securely brazed to the outer surface of the header tank without causing an increase in equipment cost and an increase in man-hours, and the end plate and the header tank can be firmly coupled.

  According to the second invention, since the end plate is fixed to the vehicle, the effect of the present invention that the end plate and the header tank can be firmly coupled can be made particularly remarkable.

  According to the third invention, when the end plate having the bottom plate portion and the first and second side plate portions is press-molded, the reinforcing portion can be molded together. Thereby, a reinforcement part can be provided in low cost.

  According to the fourth invention, since the bottom plate portion of the end plate is inserted into the header tank and brazed, the end plate and the header tank can be more firmly coupled.

  According to the fifth invention, since the brazed portion of the end plate has the side portion extending along the outer surface of the header tank and the extension portion extending continuously from the side portion, there is a manufacturing error in each part. Even if it occurs, the brazing area between the brazed portion and the header tank can be sufficiently secured.

  According to the sixth invention, since the brazing material is clad on the outer surface of the header tank or the contact surface of the end plate with the header tank, both can be brazed reliably.

It is a front view of the heat exchanger concerning an embodiment. It is a front view which expands and shows the upper left part of a heat exchanger. It is the III-III sectional view taken on the line in FIG. It is a side view of an upper end plate. It is sectional drawing in the VV line of FIG. It is sectional drawing in the VI-VI line of FIG. FIG. 6 is a view corresponding to FIG. 3 according to Modification 1 of the embodiment. It is FIG. 2 equivalent view concerning the modification 1 of embodiment. FIG. 6 is a view corresponding to FIG. 3 according to a second modification of the embodiment. FIG. 9 is a view corresponding to FIG. 2 according to a second modification of the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a heat exchanger 1 according to an embodiment of the present invention. The heat exchanger 1 is a refrigerant condenser that constitutes one element of a refrigeration cycle of a vehicle air conditioner mounted on an automobile. The heat exchanger 1 is mounted in an engine room provided in the front part of the vehicle.

  The heat exchanger 1 includes a core 10, left and right header tanks 20 and 30, and upper and lower end plates 40 and 50. The core 10 is formed by alternately arranging a large number of tubes 11 and fins 12 in the vertical direction. The tube 11 is a so-called flat tube that extends long in the left-right direction of the vehicle and has a long cross-sectional shape in the flow direction of external air. The fins 12 are corrugated fins that are continuous in the left-right direction of the vehicle when viewed from the flow direction of the external air. The dimension of the fin 12 in the vehicle left-right direction is set shorter than the dimension of the tube 11 in the same direction, and both ends of the tube 11 in the vehicle left-right direction protrude from both ends of the fin 12 in the left-right direction.

  In the description of the embodiment, the left side of the vehicle is simply referred to as “left”, and the right side of the vehicle is simply referred to as “right”.

  Both the tube 11 and the fin 12 are made of an aluminum alloy. The outer surface of a member constituting one of the tube 11 and the fin 12 is clad with a brazing material, and the tube 11 and the fin 12 are integrated by brazing adjacent fins 12 on the upper and lower surfaces of the tube 11, respectively. Has been. Fins 12 are located at both upper and lower ends of the core 10.

  As shown in FIG. 2, the left header tank 20 includes a tank body 21 formed in a cylindrical shape extending in the arrangement direction (vertical direction) of the tubes 11 and fins 12 of the core 10, and upper and lower end openings of the tank body 21. And caps 22 and 22 for closing the parts. The outer diameter of the left header tank 20 is set larger than the dimension of the core 10 in the direction of external air flow.

  The tank body 21 and the cap 22 are made of an aluminum alloy. A brazing material is clad on the outer surface of the member constituting the tank body 21. The cap 22 is brazed to the tank body 21.

  The vertical dimension of the tank main body 21 is set longer than the vertical dimension of the core 10, the upper part of the tank main body 21 protrudes upward from the upper end of the core 10, and the lower part of the tank main body 21 is lower than the lower end of the core 10. Also protrudes downward.

  A tube insertion hole (not shown) into which the left end portion of the tube 11 is inserted is formed on the core 10 side of the tank body 21 corresponding to the interval between the tubes 11. The left end portion of the tube 11 is brazed to the peripheral edge portion of the tube insertion hole while being inserted into the tube insertion hole.

  An end plate insertion hole 21b (shown in FIG. 2) into which the bottom plate portion 41 of the upper end plate 40 is inserted is formed above the tube insertion hole of the tank main body 21, although details will be described later. The end plate insertion hole 21 b is formed in a slit shape extending in the circumferential direction of the tank body 21.

  Further, an end plate insertion hole (not shown) into which a bottom plate portion (not shown) of the lower end plate 50 is inserted is formed on the lower side of the tank main body 21 in the same manner as the upper side.

  As shown in FIG. 1, the right header tank 30 also has a tank body 31 and caps 32, 32, similar to the left header tank 20. A partition plate 33 is provided near the center of the right header tank 30 in the vertical direction. The partition plate 33 is for dividing the internal space of the right header tank 30 into two in the vertical direction.

  An introduction side connection block 34 having a refrigerant introduction hole (not shown) for introducing refrigerant into the heat exchanger 1 is attached to the upper side of the tank body 31. In addition, a discharge side connection block 35 having a refrigerant discharge hole (not shown) for discharging the refrigerant flowing through the inside of the heat exchanger 1 is provided below the tank body 31. Refrigerant piping (not shown) in the engine room is connected to the introduction side connection block 34 and the discharge side connection block 35. Therefore, after the refrigerant flowing in from the introduction side connection block 34 flows through the tube 11 above the partition plate 33 to the left and flows into the left header tank 20, the tube 11 below the partition plate 33 flows to the right. Then, it flows into the right header tank 30 and is then discharged from the discharge side connection block 35.

  The upper end plate 40 is disposed on the upper side of the fin 12 positioned at the upper end portion of the core 10 and extends in the left-right direction similarly to the tube 11. The lower end plate 50 is disposed below the fins 12 located at the lower end of the core 10 and extends in the same manner as the upper end plate 40. That is, the end plates 40 and 50 are provided at the outer end portions in the arrangement direction of the tubes 11 and the fins 12 of the core 10.

  The upper and lower end plates 40 and 50 are the same, and are used by being inverted upside down in this embodiment. Hereinafter, the structure of the upper end plate 40 will be mainly described in detail.

  The upper end plate 40 is a press-formed product formed by press-molding a single plate made of an aluminum alloy. The thickness of the plate material constituting the upper end plate 40 is set to be thicker than the thickness of the plate material constituting the tube 11 or the fin 12.

  2 and 3, the upper end plate 40 includes a bottom plate portion 41 extending in the left-right direction along the fins 12 at the upper end of the core 10, and both side edges of the bottom plate portion 41 (both sides in the direction of external air flow). First and second side plate portions 42 and 43 extending upward from the edge portion, respectively, and have a substantially U-shaped cross section that opens upward as a whole. The dimension of the bottom plate portion 41 in the external air flow direction is set to be substantially the same as the dimension of the core 10 in the same direction, and is shorter than the outer diameter of the left header tank 20 as shown in FIG. Further, the bottom surface of the bottom plate portion 41 is brazed to the fin 12 at the upper end portion of the core 10.

  The left end portion of the upper end plate 40 is formed with a cut portion 45 for separating the left end portions of the first and second side plate portions 42 and 43 from the bottom plate portion 41. A notch (not shown) is similarly formed at the right end of the upper end plate 40. The left and right end portions of the bottom plate portion 41 are inserted into the end plate insertion holes 21b of the left and right header tanks 20 and 30, and are brazed to the peripheral portions of the end plate insertion holes 21b.

  A first brazing portion 44 that is brazed to the outer surface of the left header tank 20 is provided at the left end portion of the first side plate portion 42 of the upper end plate 40. The first brazing portion 44 extends from the core 10 toward the left header tank 20 and is formed so as to contact the outer surface of the left header tank 20. The first brazing part 44 is separated from the bottom plate part 41, and as shown in FIG. 3, a bent part 44 a bent in a direction away from the second side plate part 43 in the thickness direction, and the outer surface of the left header tank 20 And an arcuate portion 44b that extends in the circumferential direction and is curved in an arc shape. The arc-shaped portion 44b is continuous with the bent portion 44a.

  The arc-shaped portion 44 b is separated from the second side plate portion 43 in the thickness direction as compared with the middle portion in the left-right direction of the first side plate portion 42. The left end portion of the first arc-shaped portion 44b is a central portion in the left-right direction on the outer surface of the header tank 20 when the left header tank 20 is viewed from the air flow direction (a portion corresponding to the central axis Z of the header tank 20). Is located.

  The first side plate portion 42 of the upper end plate 40 is provided with a first bead (reinforcing portion) 46 for reinforcing the first brazing portion 44. The first bead 46 is obtained by molding a part of the first side plate portion 42 so as to protrude in a direction away from the outer surface of the left header tank 20 in the thickness direction of the first side plate portion 42. In the embodiment, the bottom plate portion 41 and the first and second side plate portions 42 and 43 of the upper end plate 40 are formed simultaneously with the press molding.

  The first bead 46 may be press-molded at a timing different from the press molding of the bottom plate portion 41 and the first and second side plate portions 42 and 43.

  As shown in FIG. 2, the first bead 46 is located in the center in the vertical direction of the first side plate portion 42, and the first side plate portion 42 is shifted from the first brazing portion 44 to the left and right sides of the first side plate portion 42. It is formed over a part of the middle portion in the direction. As shown in FIG. 3, the protruding height of the first bead 46 is set to be highest at the central portion in the vertical direction and lower toward the upper side and the lower side, and to the left end of the first bead 46. It is set lower as it goes to the right end. Therefore, the longitudinal cross section of the first bead 46 has a mountain shape. Further, the vertical dimension of the first bead 46 is shorter toward the left side and shorter toward the right side.

  Thus, by forming the 1st bead 46 from the 1st brazing part 44 to the intermediate part of the 1st side plate part 42, the 1st bead 46 will function as a rib, and the 1st brazing part Thus, the rigidity of the upper end plate 40 is also increased.

  As shown in FIG. 3, a second brazed portion 47 and a second bead 48 similar to the first brazed portion 44 are also provided at the left end portion of the second side plate portion 43. That is, the second brazing part 47 is formed so as to contact the outer surface of the left header tank 20 from the side opposite to the first brazing part 47. The second brazing portion 47 has a bent portion 47a and an arcuate portion 47b.

  The first brazing part 44 and the second brazing part 47 are located so as to sandwich the left header tank 20 in the radial direction.

  Further, as shown in FIG. 1, the first brazing portion 44 and the first bead 46 are provided at the right end portion of the first side plate portion 42 as well as the left end portion. A second brazing part and a second bead are also provided at the right end of the part 43.

  The lower end plate 50 also includes a first side plate portion 52 and a second side plate portion (only the first side plate portion 52 is shown in FIG. 1). A first brazing portion 54 and a first bead portion 56 are provided at both left and right end portions of the first side plate portion 52. Although not shown, the second side plate portion includes a second brazing portion and a second brazing portion. Two bead portions are provided.

  Brackets (fixing members) B are attached to the left and right sides of the upper and lower end plates 40 and 50, respectively. The bracket B is made of a metal plate, and is fixed to the end plates 40 and 50 by a fastening member. The bracket B is for attaching the heat exchanger 1 to a member on the vehicle side. The bracket B may be made of resin.

  If the bracket B is made of an aluminum alloy, it may be brazed to the upper and lower end plates 40, 50. 2 and 3, the bracket B is omitted.

  Next, the manufacturing point of the heat exchanger 1 configured as described above will be described. First, the tube 11 and the fins 12 are alternately arranged to constitute the core 10, and the upper and lower end plates 40 and 50 are arranged on the outer end portion of the core 10, and the tubes 11, the fins 12 and the end plates 40, 50 is bound by a binding member such as a wire.

  Thereafter, the end portions of the tubes 11 of the core 10 are inserted into the tube insertion holes of the left and right header tanks 20 and 30, and the bottom plate portions 41 of the end plates 40 and 50 are inserted into the end plates of the left and right header tanks 20 and 30, respectively. The header tanks 20 and 30 are integrated with the core 10 and the end plates 40 and 50 by being inserted into the holes 21b. In this state, as shown in FIG. 3, the first brazing part 44 and the second brazing part 47 on the left side of the upper end plate 40 sandwich the left header tank 20 in the radial direction. The first brazing part and the second brazing part sandwich the right header tank 30 in the radial direction. Similarly, the lower end plate 50 also sandwiches the right header tank 30 while the first and second brazing portions sandwich the left header tank 20.

  Thereafter, the core 10, the header tanks 20 and 30, and the end plates 40 and 50 are transported into a brazing furnace.

  Each member is heated in the furnace, and the brazing material clad on each member is melted. At this time, the strength of the upper and lower end plates 40, 50 may be reduced due to the influence of heat, but the first beads 46, 56 and the second beads 48 are provided on these end plates 40, 50. Since the strength of the first brazing portions 44 and 54 and the second brazing portion 47 is increased, the first brazing portions 44 and 54 and the second brazing portion 47 are provided on the outer surfaces of the left and right header tanks 20 and 30. It is suppressed that it deform | transforms away from. Therefore, the 1st brazing parts 44 and 54 and the 2nd brazing part 47 can be made to contact | adhere to the outer surface of the left side and right side header tanks 20 and 30, and it can braze reliably.

  As described above, according to the heat exchanger 1 of this embodiment, the first bead that reinforces the first brazing portions 44 and 54 and the second brazing portion 47 of the upper and lower end plates 40 and 50. Since the 46 and 56 and the second bead 48 are provided, the first brazing heated in the brazing furnace without performing spot welding of the first brazing portions 44 and 54 and the second brazing portion 47. Deformation of the brazing portions 44 and 54 and the second brazing portion 47 can be suppressed. Accordingly, the end portions of the upper and lower end plates 40, 50 can be securely brazed to the outer surfaces of the left and right header tanks 20, 30 without causing an increase in equipment costs and an increase in man-hours. The end plates 40, 50 and the left and right header tanks 20, 30 can be firmly coupled.

  Further, in the present embodiment, when the heat exchanger 1 is fixed to the vehicle, the bracket B is attached to the upper and lower end plates 40, 50 and fixed via the bracket B. The side end plates 40 and 50 are subjected to a force due to vehicle vibration or the like. In this case, as described above, the upper and lower end plates 40, 50 are firmly coupled to the left and right header tanks 20, 30 to improve the rigidity of the end plates 40, 50. 50 deformation and breakage can be reduced.

  Further, when the upper and lower end plates 40, 50 are press-molded, the first beads 46, 56 and the second beads 48 can be molded together. Thereby, the 1st and 2nd beads 46 and 47 can be provided at low cost.

  In addition, since the bottom plate portions 41 of the upper and lower end plates 40, 50 are inserted into the left and right header tanks 20, 30 and brazed, the end plates 40, 50 and the header tanks 20, 30 are more connected. It is possible to bond more firmly.

  Further, since the brazing material is clad on the outer surfaces of the left and right header tanks 20 and 30, the upper and lower end plates 40 and 50 and the left and right header tanks 20 and 30 can be brazed reliably.

  Note that the shape of the first and second beads 46 and 48 is not limited to the above-described shape. For example, from the vicinity of the lower end portion of the side plate portion 42 to the upper end portion as in Modification 1 shown in FIGS. 7 and 8. You may form over. In this modified example 1, since the vertical dimension of the first bead 46 can be ensured long, the reinforcing effect is further enhanced.

  Moreover, you may provide the extension part 44c extended from the circular arc-shaped part 44b in the 1st brazing part 44 like the modification 2 shown in FIG.9 and FIG.10. The extension portion 44c is connected to the left end portion of the arc-shaped portion 44b and extends linearly to the side (left side) opposite to the core 10 in the header tank 20. The extension portion 44c extends linearly to the left side from the portion corresponding to the central axis Z on the outer surface of the left header tank 20, and therefore, the extension portion 44c moves away from the outer surface of the left header tank 20 toward the left end of the extension portion 44c. Will go. Similarly, the second brazing part 47 may be provided with an extension part 47c.

  In the second modification, for example, even if a manufacturing error occurs in the left header tank 20 or the upper end plate 40 and the left header tank 20 is shifted to the left side from the normal position, the extension 44c is provided. The extension portion 44c can be brought into contact with the outer surface of the header tank 20, and a wide contact area between the first brazing portion 44 and the header tank 20 can be secured. The length A of the extension 44c can be set arbitrarily, but for example, it may be secured about 1/10 of the outer diameter of the header tank 20.

  In the above embodiment, the upper and lower end plates 40, 50 are clad with the brazing material, but this is not limiting, and the members constituting the left and right header tanks 20, 30 are clad with the brazing material. Also good. In this case, the brazing material is positioned on the outer surfaces of the left and right header tanks 20 and 30.

  Moreover, although the said embodiment demonstrated the case where this invention was applied to the refrigerant condenser of the vehicle air conditioner, this invention can be applied to the various heat exchangers which have an end plate besides for vehicles. it can.

  In the above embodiment, one bead 46, 47 is provided on each of the first and second side plate portions 42, 43 of the upper and lower end plates 40, 50. However, the beads 46, 47 provided on each of the first and second side plate portions 42, 43 are provided. The number of may be two or more.

  In the above embodiment, the bracket B is attached to the upper and lower end plates 40, 50. However, the bracket B may be omitted.

 In the above embodiment, the end plates 40 and 50 are arranged so as to extend in the left-right direction. However, the present invention is not limited thereto, and the tubes 11 and the fins 12 of the core 10 are arranged so as to extend in the up-down direction. After the header tanks 20 and 30 are disposed above and below the core 10, the end plates 40 and 50 may be disposed so as to extend in the vertical direction.

  Moreover, in the said embodiment, although bead 46,56,48 is made into the reinforcement part, it is not restricted to this, For example, you may make the thick part thicker than the other site | part as a reinforcement part.

  As described above, the heat exchanger according to the present invention can be applied to, for example, a refrigerant condenser of a vehicle air conditioner.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 10 Core 11 Tube 12 Fin 20, 30 Header tank 40, 50 End plate 41 Bottom plate part 42, 43 Side plate part 44 Brazing part 44a Bending part 44b Arc-shaped part 44c Extension part 46 Bead (reinforcement part)
B Bracket (fixing member)

Claims (6)

A core in which tubes and fins are alternately arranged;
A header tank provided at the tube end of the core and connected to the tube end;
In the heat exchanger provided with an end plate provided in the arrangement direction outer end of the tube of the core and the fin,
The end plate extends to the header tank side from the core, is formed so as to contact the outer surface of the header tank, and is brazed to the outer surface, and the reinforcement for reinforcing the brazed portion And a heat exchanger. The heat exchanger according to claim 1,
A heat exchanger, wherein a fixing member for fixing the heat exchanger to the vehicle is attached to the end plate. The heat exchanger according to claim 1 or 2,
The end plate is a press-molded product including a bottom plate portion extending along an outer end portion of the core, and first and second side plate portions rising from both side edge portions of the bottom plate portion,
The brazing part is provided on the first and second side plate parts, and the reinforcing part is constituted by a bead press-formed on the first and second side plate parts. Exchanger. The heat exchanger according to claim 3,
A heat exchanger, wherein a bottom plate portion of the end plate is inserted into the header tank and brazed to the header tank. The heat exchanger according to any one of claims 1 to 4,
The header tank has a cylindrical shape extending in the arrangement direction of the tubes and fins,
The brazing portion extends along the outer surface of the header tank in a circumferential direction to a portion corresponding to the central axis of the header tank, and is connected to the side portion, and is opposite to the core side in the header tank. And a linearly extending extension. The heat exchanger according to any one of claims 1 to 5,
A heat exchanger, wherein a brazing material is clad on an outer surface of the header tank or a contact surface of the end plate with the header tank.

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