JP6666704B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger used as, for example, a condenser of a vehicle air conditioner.

  Conventionally, as this type of heat exchanger, a pair of headers arranged at intervals in the radial direction, a plurality of flat tubes arranged at intervals in the axial direction of the header, each tube And a heat transfer fin provided between the heat exchangers, and a heat medium is circulated between the headers through the tubes to exchange heat between air flowing outside the tubes and the heat medium in the tubes. Such is known.

  Further, in the heat exchanger, reinforcing members having a U-shaped cross section extending along the tubes are provided at both ends in the arrangement direction of the tubes, and the reinforcing members are combined for mounting the heat exchanger in the engine room of the vehicle. A resin bracket is attached (for example, see Patent Document 1).

Japanese Patent No. 4389793

  In the heat exchanger, a metal header, a tube, a heat transfer fin, and a reinforcing member are integrally brazed in a furnace. However, since the bracket is made of synthetic resin, the bracket is attached to the reinforcing member after brazing. As a method of attaching the bracket to the reinforcing member, there is a method of fixing the bracket to the reinforcing member by using another component such as a bolt or a rivet. However, this increases the number of components and complicates the attaching operation. Therefore, in the heat exchanger, the bracket is fixed to the reinforcing member by press-fitting a protrusion integrally formed on the bracket into a hole of the reinforcing member.

  Since this mounting structure does not require the use of bolts or rivets, there are advantages that the number of parts can be reduced and the mounting operation can be easily performed. However, in this mounting structure, a plurality of claw portions for retaining are formed on the peripheral surface of the protrusion of the bracket, and the claw is press-fitted into the hole of the reinforcing member while elastically deforming the claw. However, there has been a problem that the shape of the bracket becomes complicated and resin molding of the bracket becomes difficult.

  The present invention has been made in view of the above problems, and an object of the present invention is to easily attach a bracket to a reinforcing member without using a separate part, and to provide a structure of a bracket for attaching to the reinforcing member. It is to provide a heat exchanger that can be simplified.

The present invention, in order to achieve the above object, in a heat exchanger including a metal heat exchanger body and a synthetic resin bracket attached to the heat exchanger body, provided in the heat exchanger body , A reinforcing member having a U-shaped cross section to which the bracket is attached is provided at both ends in the longitudinal direction, the reinforcing member includes a bottom surface portion and a pair of side surface portions, and the longitudinal end portions of each side surface portion are opposed to each other with a space therebetween. A pair of mounting pieces are provided, each mounting piece extending from one end in the longitudinal direction of the side surface toward the other end in the longitudinal direction, and from the upper end in the height direction of the side surface. The bracket is formed with a second notch extending toward the bottom surface side, and the bracket is provided with a fixing portion disposed between the mounting pieces, and each mounting piece is bent inward in the facing direction. By locking to the fixed part, The movement of the fixing portion with respect to the extending direction of the mounting piece is restricted by the mounting pieces, the width direction portion of each mounting piece are bent in opposite directions inward than the other part, fixed with respect to the width direction of the mounting piece The movement of the part is regulated by a part of the width direction of each mounting piece.

  Thereby, by bending each mounting piece inward in the opposite direction and locking each mounting piece to the fixing part, the movement of the fixing part with respect to the extending direction of each mounting piece is regulated by each mounting piece. The bracket is attached to the heat exchanger by caulking each attachment piece without using separate parts such as rivets and rivets.

  ADVANTAGE OF THE INVENTION According to this invention, since a bracket can be easily attached to a heat exchanger by caulking of each attachment piece without using separate parts, such as a bolt and a rivet, the number of parts can be reduced and cost reduction can be achieved. In addition to this, the mounting structure of the bracket can be simplified.

Front view of a heat exchanger showing a first embodiment of the present invention Main part front view of heat exchanger Principal part perspective view of reinforcing member Side view of main parts of reinforcement member Main part plan view of reinforcement member Front view of reinforcement member Plan view showing a flat reinforcing member Front view of bracket Side view of bracket AA line arrow direction sectional view BB line arrow direction sectional view C-C line arrow direction sectional view Enlarged side view of mounting piece and fixing part Main part exploded front view of heat exchanger Front sectional view of mounting piece and fixing part Front sectional view of mounting piece and fixing part Front sectional view of mounting piece and fixing part Front sectional view of mounting piece and fixing part Enlarged side view of mounting piece and fixing part Enlarged side view of mounting piece and fixing part Plane sectional view of mounting piece and fixing part Plane sectional view of mounting piece and fixing part Front sectional view of a mounting piece and a fixing portion showing a second embodiment of the present invention. Perspective view of a main part of a reinforcing member showing a third embodiment of the present invention. Perspective view of a main part of a reinforcing member showing a fourth embodiment of the present invention. A perspective view of a main part of a reinforcing member showing a fifth embodiment of the present invention. Perspective view of a main part of a reinforcing member showing a sixth embodiment of the present invention. Perspective view of a main part of a reinforcing member showing a seventh embodiment of the present invention.

  FIGS. 1 to 22 show a first embodiment of the present invention, and show, for example, a heat exchanger used as a radiator (condenser) of a vehicle air conditioner.

  In the heat exchanger of the present embodiment, the heat exchanger body 1 is arranged with a pair of cylindrical headers 10 arranged at intervals in the radial direction and at intervals in the axial direction of the headers 10, A plurality of flat tubes 20 each having both ends connected to each header 10, heat transfer fins 30 provided on both sides in the thickness direction of each tube 20, and reinforcing members provided on both sides in the arrangement direction of tubes 20 40, and brackets 50 are respectively attached to the upper end and lower end of each header 10.

  Each header 10 is made of a member formed of a metal such as aluminum in a cylindrical shape. A plurality of connection holes 11 to which the ends of the tubes 20 are connected are formed on the side surface (peripheral wall surface) of the header 10. It is provided at equal intervals in the direction. Both ends of each header 10 in the axial direction are closed by lid members 12 respectively. Further, although not shown, one header 10 is connected to an inflow pipe through which the heat medium flows, and the other header 10 is connected to an outflow pipe through which the heat medium flows out.

  Each tube 20 is made of a metal such as aluminum, and is formed in a flat shape in which the dimension in the thickness direction is smaller than the dimension in the width direction. In the tube 20, a plurality of coolant circulation holes (not shown) forming a flow path of the heat medium are provided at equal intervals in the width direction of the tube 20.

  The heat transfer fins 30 are made of a member in which a metal plate such as aluminum is formed in a corrugated shape, and are disposed between the tubes 20. The heat transfer fins 30 are also arranged between the uppermost tube 20 and the reinforcing member 40 and between the lowermost tube 20 and the reinforcing member 40.

  The reinforcing member 40 is made of metal such as aluminum, and is formed to extend in the longitudinal direction of the tube 20. The reinforcing member 40 includes a bottom surface portion 41 and a pair of side surface portions 42, and has a U-shaped cross section. Tip portions 41a (both longitudinal ends) of the bottom portion 41 extend longer than the side portions 42, and the tip portions 41a are inserted into holes (not shown) provided on the side surfaces of the header 10, respectively. ing. At both ends in the longitudinal direction of the reinforcing member 40, mounting portions 43 for mounting the bracket 50 are provided, and the mounting portions 43 include a pair of opposed mounting pieces 43a formed on each side surface portion 42. The mounting piece 43a has a first cutout portion 42a extending from one longitudinal end of the side surface portion 42 toward the other longitudinal end, and a second cutout portion extending from the upper end of the side surface portion 42 in the height direction toward the bottom surface portion 41. , And extends in the height direction of the side surface portion 42. The edge of the first notch 42a has a first edge 42a-1 extending obliquely from the bottom 41 to the height direction of the side 42, and a second edge extending parallel to the bottom 41. And a part 42a-2. As shown in FIG. 7, the reinforcing member 40 is formed in a U-shaped cross section by bending a flat plate member 40 'provided with the notches 42a and 42b. At this time, since the first edge portion 42a-1 of the first notch portion 42a is inclined with respect to the height direction of the side surface portion 42, the width dimension W1 between the outer side surfaces of each side surface portion 42 is set to the bottom surface. The portion 41 is bent so as to be equal to the width dimension W2 of the distal end portion 41a. That is, as shown by the broken line in FIG. 7, the portion corresponding to the first edge 42 a-1 is obliquely bent inward in the width direction of the bottom surface portion 41, so that the other portion has the side surface 42. It is bent by the thickness of the part 42 at the position inside the width direction of the bottom part 41 (for example, see Japanese Patent No. 56661578).

  The bracket 50 is made of a synthetic resin molded product, and is attached to each of the upper and lower ends of each header 10 of the heat exchanger at four locations. The bracket 50 includes a bracket body 51 formed so as to cover the end of the header 10 and the end of the reinforcing member 40, and a mounting portion 52 provided integrally on the upper surface of the bracket body 51 in the drawing. The bracket body 51 is formed to be substantially L-shaped from the end of the reinforcing member 40 to the end of the header 10, and has a cross-section capable of engaging with the end of the reinforcing member 40 and the end of the header 10. It is formed in a U-shape. That is, the bracket main body 51 includes an upper wall portion 51a that covers an end portion of the header 10 and an end portion of the reinforcing member 40 in the drawing and a pair of upper wall portions 51a that cover both sides of the end portion of the header 10 and the end portion of the reinforcing member 40. Of the header 10 and a back wall 51c that covers the back side (left side in the figure) of the header 10. Each side wall 51b is provided with an opening 51d. In the bracket main body 51, a fixing portion 53 to which the mounting portion 43 of the reinforcing member 40 is fixed, an engaging portion 54 that engages between the side surfaces 42 of the reinforcing member 40, and abuts on the outer peripheral surface of the header 10. A plurality of abutting portions 55 are provided, and each mounting piece 43a of the reinforcing member 40 is fixed to the fixing portion 53 by caulking. The fixing portion 53 is formed in a block shape extending in the longitudinal direction of the bracket main body 51 (longitudinal direction of the reinforcing member 40), and is provided integrally with the upper wall portion 51a at the longitudinal center of the bracket main body 51. The fixing portion 53 has a substantially triangular cross-section in which both side surfaces are inclined inward in the width direction from below to above, and is inserted between the mounting pieces 43a. As shown in FIG. 13, the fixing portion 53 is formed such that one end in the longitudinal direction of the bracket body 51 is shorter than one end in the width direction (the left-right direction in the drawing) of each mounting piece 43a. One end 43a-1 (a part in the width direction) of the width direction 43a is opposed via a portion S where the fixing portion 53 does not exist. Openings 51d of each side wall 51b are arranged on both sides of the fixing portion 53, and a jig for caulking can be inserted from each opening 51d. The engaging portion 54 is formed in a block shape extending in the longitudinal direction of the reinforcing member 40, and is provided integrally with the upper wall portion 51 a at one longitudinal end of the bracket body 51. A plurality of protrusions 54 a extending in the vertical direction are provided at both sides in the width direction of the engaging portion 54 at intervals in the longitudinal direction of the bracket main body 51, and the engaging portion 54 is provided between the side surfaces 42 of the reinforcing member 40. , Each ridge 54 a is pressed against the inner surface of each side surface 42. Each contact portion 55 is protruded from each of the side wall portion 51b, the back wall portion 51c, and the fixing portion 53, and comes into contact with the outer peripheral surface of the header 10 from four locations in the circumferential direction.

  When manufacturing the heat exchanger configured as described above, each header 10, each tube 20, each heat transfer fin 30, and each reinforcement member 40 are temporarily assembled, and these are brazed in a furnace. An exchanger is formed. Next, brackets 50 are respectively attached to the upper end and the lower end of each header 10 in the heat exchanger. At this time, as shown in FIG. 14, when the bracket body 51 is engaged with the end of the header 10 and the end of the reinforcing member 40 from above and below in the figure, the engaging portions 54 of the bracket body 51 The bracket 50 is press-fitted between the portions 42 and the bracket 50 is temporarily held by the reinforcing member 40. The end of the header 10 is arranged between the contact portions 55 of the bracket body 51, and the header 10 is positioned in the radial direction by contact with the contact portions 55. Further, as shown in FIGS. 15 and 21, the fixing portion 53 of the bracket main body 51 is disposed between the mounting pieces 43 a of the reinforcing member 40.

  Here, as shown in FIGS. 16 and 22, a jig for caulking (not shown) is inserted from each opening 51d of the bracket body 51, and each mounting piece 43a is pressed inward in the width direction by the jig. Each mounting piece 43a is bent toward the fixing portion 53 and fixed to the fixing portion 53. At this time, since each mounting piece 43a is bent inward from the base end side in the height direction along the inclined surface of the fixing part 53, the movement of the fixing part 53 in the extending direction of each mounting piece 43a is It is regulated by the mounting piece 43a. In this case, for example, even when the bracket 50 is incompletely inserted into the heat exchanger body 1 and the position of the fixing portion 53 with respect to each mounting piece 43a is shifted upward, the bent mounting pieces 43a are fixed to the fixing portion 53. The fixing portion 53 is guided downward by abutting on the inclined surface, so that each mounting piece 43a and the fixing portion 53 are always fixed at the same position in the vertical direction. Further, even when the bracket 50 is completely inserted into the heat exchanger main body 1 side, when the fixing position of the fixing portion 53 with respect to each mounting piece 43a is shifted upward due to dimensional error or the like as shown in FIG. When each mounting piece 43a is locked closer to the lower end of the inclined surface of the fixing portion 53 than the position in FIG. 16, and the fixing position of the fixing portion 53 with respect to each mounting piece 43a is shifted downward as shown in FIG. Each of the mounting pieces 43a is locked closer to the upper end of the inclined surface of the fixing portion 53 than the position in FIG.

  Further, since one end 43a-1 in the width direction of each mounting piece 43a is opposed via the portion S where the fixing portion 53 does not exist, when each mounting piece 43a is bent toward the fixing portion 53 by caulking, FIG. As shown in the figure, one end 43a-1 in the width direction of each mounting piece 43a is bent by a portion S where the fixing portion 53 does not exist inward in the width direction from the other portion by α. Thereby, one end side 43a-1 in the width direction of each mounting piece 43a is locked to the end of the fixing portion 53 from the width direction of each mounting piece 43a, and the movement of each mounting piece 43a in the width direction is caused by each mounting piece 43a. Is regulated by one end side 43a-1 in the width direction. At this time, if the fixing position of the fixing portion 53 with respect to each mounting piece 43a is shifted to one side in the width direction of each mounting piece 43a due to a dimensional error or the like as shown in FIG. 19, one end in the width direction of each mounting piece 43a. 43 is bent from the end of the fixing portion 53 at a position farther from one end in the width direction of each mounting piece 43a than the position in FIG. 13, and the fixing position of the fixing portion 53 to each mounting piece 43a is changed as shown in FIG. If the mounting piece 43a is shifted to the other side in the width direction, the one end 43a-1 in the width direction of each mounting piece 43a is positioned closer to one end in the width direction of each mounting piece 43a than the position in FIG. Bend from the end.

  As described above, according to the present embodiment, the metal heat exchanger main body 1 to which the synthetic resin bracket 50 is mounted is provided with the pair of mounting pieces 43a extending so as to face each other at an interval. The fixing portion 53 on the bracket 50 side is disposed between the mounting pieces 43a, and each mounting piece 43a is bent inward in the facing direction to lock each mounting piece 43a to the fixing portion 53, thereby securing each mounting piece 43a. Since the movement of the fixing portion 53 in the extending direction is restricted by the mounting pieces 43a, the bracket 50 is easily mounted on the heat exchanger by caulking the mounting pieces 43a without using another component such as a bolt or a rivet. be able to. Thus, the number of components can be reduced, so that the cost can be reduced and the mounting structure of the bracket 50 can be simplified.

  In addition, by bending one end 43a-1 (a part in the width direction) of each mounting piece 43a in the width direction inward from the other part in the facing direction, the movement of the fixing portion 53 in the width direction of each mounting piece 43a can be changed by each mounting. Since the restriction is made by the one end 43a-1 in the width direction of the piece 43a, the bracket 50 can be securely fixed not only in the extending direction of each mounting piece 43a but also in the width direction of each mounting piece 43a. it can. Accordingly, even when the vibration or impact is easily applied, such as a radiator of a vehicle air conditioner arranged in an engine room, the caulking portion does not easily become loose, and the mounting of the bracket 50 is not performed. Strength can be increased.

  At this time, one end 43a-1 in the width direction of each attachment piece 43a is bent inward in the opposite direction from the other end of each attachment piece 43a from the end of the fixing part 53. Even when the fixing position is shifted in the width direction of each mounting piece 43a, one end 43a-1 in the width direction of each mounting piece 43a is always bent from the end of the fixing part 53, and the fixing part with respect to the width direction of each mounting piece 43a. Each mounting piece 43a can be securely locked to the fixing portion 53 regardless of the displacement of the position 53.

  In addition, the fixing portion 53 is formed so that the width decreases from the base end side in the extending direction of each mounting piece 43a toward the distal end side, and the distal end side in the extending direction of each mounting piece 43a is located inside the base end side in the facing direction. And is locked to the fixing portion 53. Therefore, even when the fixing position of the fixing portion 53 with respect to each mounting piece 43a is shifted in the extending direction of each mounting piece 43a, each mounting piece 43a is always It is bent inward in the opposing direction along the inclined surface, and each mounting piece 43a can be securely locked to the fixing part 53 regardless of the positional deviation of the fixing part 53 with respect to the extending direction of each mounting piece 43a.

  Further, the heat exchanger of the present embodiment includes a reinforcing member 40 having a substantially U-shaped cross section including a bottom surface portion 41 and a pair of side surface portions 42, and each mounting piece 43 a is formed on each side surface portion 42 of the reinforcing member 40. Therefore, there is an advantage that a dedicated mounting member for providing each mounting piece 43a is not required, and the number of parts is not increased.

  Further, since the fixing portion 53 is formed in a substantially triangular cross section in which the width decreases from the base end side in the extending direction of each mounting piece 43a toward the distal end side, the distal end side of each mounting piece 43a is positioned from the base end side. Can also be bent inward in the facing direction, and the fixing portion 53 can be firmly fixed in the extending direction of each mounting piece 43a.

  Further, the bracket body 51 of the bracket 50 is formed so as to cover the reinforcing member 40, and the bracket body 51 is provided with an opening 51d through which a jig for pressing and bending each of the mounting pieces 43a can be inserted from the outside. Therefore, each mounting piece 43a and the fixing portion 53 can be protected from the outside by the bracket body 51 without exposing the entire mounting piece 43a to the outside.

  Further, the reinforcing member 40 is formed such that the longitudinal end portion 41 a of the bottom surface portion 41 extends longer than each side surface portion 42, and the width dimension between the outer surfaces of each side surface portion 42 is the bottom surface portion 41. Each side surface portion 42 is bent with respect to the bottom surface portion 41 so as to be equal to the width dimension of the tip portion 41a of the bottom surface portion. Therefore, even when each of the side surface portions 42 is formed by bending a plate-shaped member, the bottom surface portion 41 is formed. The width dimension of the distal end portion 41a is not reduced, and a sufficient bonding area between the distal end portion 41a and the heat transfer fin 30 can be ensured. Accordingly, even when an external force is applied to the tip 41a of the bottom portion 41 when bending each attachment piece 43a, the joint between the tip 41a of the bottom portion 41 and the heat transfer fin 30 is not easily separated. There is an advantage.

  In the above-described embodiment, the fixing portion 53 is formed to have a substantially triangular cross section so that the width of the fixing portion 53 decreases from the base end side in the extending direction of each mounting piece 43a toward the front end side. Although shown in FIG. 23, as in the fixing portion 56 shown in the second embodiment of FIG. 23, the lower end of both side surfaces may be formed in a substantially inverted T-shaped cross section projecting to both sides.

  Further, the reinforcing member 40 is not limited to the one shown in the first embodiment, but may have another shape as shown in FIGS.

  For example, as in the third embodiment shown in FIG. 24, an L-shaped notch 42c may be provided instead of the second notch 42b in the first embodiment. This makes it possible to easily bend the one end 43a-1 in the width direction of each mounting piece 43a.

  Also, as in the fourth embodiment shown in FIG. 25, notches 42d are respectively formed on both sides in the width direction of the tip portion 41a of the bottom portion 41, instead of the first notches 42a of the first embodiment. It may be provided. Thereby, similarly to the first embodiment, each side surface portion 42 can be bent at a width equal to that of the bottom surface portion 41.

  Further, as in the fifth embodiment shown in FIG. 26, instead of the first cutout portion 42a of the first embodiment, each side surface portion 42 extends linearly along the longitudinal direction of the bottom surface portion 41. The notch 42e may be provided.

  Further, as in the sixth embodiment shown in FIG. 27, the notch 42e may not be provided in the fifth embodiment.

  Further, as in the seventh embodiment shown in FIG. 28, in the sixth embodiment, a notch 42f bent in an L-shape may be provided instead of the second notch 42b. .

  DESCRIPTION OF SYMBOLS 1 ... Heat exchanger main body, 10 ... Header, 20 ... Tube, 30 ... Heat transfer fin, 40 ... Reinforcement member, 41 ... Bottom part, 42 ... Side part, 43a ... Mounting piece, 43a-1 ... One end side in the width direction, 50: bracket, 51: bracket body, 51d: opening, 53, 56: fixing part.

Claims (6)

In a heat exchanger including a metal heat exchanger body and a synthetic resin bracket attached to the heat exchanger body,
The heat exchanger body includes a reinforcing member having a U-shaped cross section to which the bracket is attached at both ends in the longitudinal direction,
The reinforcing member includes a bottom surface portion and a pair of side surface portions, and a pair of mounting pieces extending so as to face each other at intervals are provided at both longitudinal end portions of each side surface portion ,
Each mounting piece has a first notch extending from one longitudinal end to the other longitudinal end of the side surface, and a second notch extending from the upper end in the height direction of the side surface toward the bottom surface. Formed between
The bracket is provided with a fixing portion disposed between the mounting pieces,
Each mounting piece is bent inward in the facing direction and locked to the fixing portion, so that the movement of the fixing portion in the extending direction of each mounting piece is regulated by each mounting piece ,
It is characterized in that a part of each mounting piece in the width direction is bent inward in the opposite direction from the other part, and the movement of the fixing portion in the width direction of each mounting piece is regulated by the part of each mounting piece in the width direction. And heat exchanger. The heat exchanger of claim 1, wherein said width direction portion of each mounting piece are bent in the opposite direction inside than the rest of the mounting piece from the end of the fixed part. In a heat exchanger including a metal heat exchanger body and a synthetic resin bracket attached to the heat exchanger body,
The heat exchanger body includes a reinforcing member having a U-shaped cross section to which the bracket is attached at both ends in the longitudinal direction,
The reinforcing member includes a bottom surface portion and a pair of side surface portions, and a pair of mounting pieces extending so as to face each other at intervals are provided at both longitudinal end portions of each side surface portion ,
Each mounting piece has a first notch extending from one longitudinal end to the other longitudinal end of the side surface, and a second notch extending from the upper end in the height direction of the side surface toward the bottom surface. Formed between
The bracket is provided with a fixing portion disposed between the mounting pieces,
Each mounting piece is bent inward in the facing direction and locked to the fixing portion, so that the movement of the fixing portion in the extending direction of each mounting piece is regulated by each mounting piece,
The fixing portion is formed so that the width decreases from the base end side of the extending direction of each mounting piece toward the distal end side,
A heat exchanger, wherein the distal end side of each mounting piece in the extending direction is bent inward in the opposite direction from the base end side and is locked to the fixed portion. The heat exchanger body has a pair of cylindrical headers arranged at intervals in the radial direction, and is arranged at intervals in the axial direction of the headers, and has a flat shape having both ends connected to each header. With a plurality of tubes ,
The heat exchanger according to claim 1, 2 or 3 , wherein the reinforcing members are arranged on both sides in the arrangement direction of the tubes, respectively, and are formed to extend in the longitudinal direction of the tubes. The bracket has a bracket main body formed to cover each side surface of the reinforcing member, and the bracket main body has an opening through which a jig for pressing and bending each of the mounting pieces can be inserted from the outside. The heat exchanger according to claim 4, wherein: The reinforcing member is formed so that the longitudinal end of the bottom portion extends longer than each side portion, and the width between the outer surfaces of each side portion is the same as the width of the tip of the bottom portion. The heat exchanger according to claim 4 or 5 , wherein each side portion is bent with respect to the bottom portion so as to be the same.

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