JP2012088011A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which facilitates the manufacture of a header of a bisected structure, does not require excessive equipment, thereby enabling the manufacturing cost thereof to be reduced.SOLUTION: The heat exchanger has a number of heat exchange tubes arranged side by side between a pair of cylindrical headers. In the heat exchanger, each header includes a semi-cylindrical first header member 11 in which a large number of heat exchange tube insertion holes 13 for inserting end parts of heat exchange tubes thereinto are disposed along the length direction and a semi-cylindrical second header member which is combined with the first header member 11 to constitute the header, a caulking part 15 is disposed on either side of the first header member 11 and the second header member and is caulked to the other side of both header members, wherein the caulking part 15 has a width W1 of a base part 15A smaller than the width W2 of the top end part 15B.

Description

  The present invention relates to a heat exchanger in which a large number of heat exchange tubes are arranged in parallel between a pair of cylindrical headers arranged at predetermined intervals.

  Conventionally, in a vehicle air conditioner, a so-called parallel flow type heat exchanger in which a large number of heat exchange tubes are arranged in parallel between a pair of cylindrical headers arranged at predetermined intervals is condensed. Used in the vessel. In such a heat exchanger, there is one in which a pair of cylindrical headers has a two-part structure. The header of the two-part structure is coupled to a semi-cylindrical first header member (header plate) in which a large number of tube insertion holes for inserting end portions of the heat exchange tubes are provided along the length direction. A semi-cylindrical second header member (tank plate) is provided, and either the first header member or the second header member is provided with a crimping portion that is crimped to the other side. (For example, see Patent Documents 1-3).

  The header is temporarily fixed by crimping the two divided members at the crimping portion. A large number of heat exchange tubes are assembled to this, and corrugated fins are further arranged between the heat exchange tubes, and side plates are fixed to both sides of the heat exchange tubes, whereby a heat exchanger is temporarily assembled. In this heat exchanger, each member is made of an aluminum alloy, and a brazing material is clad on a required member. Therefore, the heat exchanger temporarily assembled as described above is put into a furnace, and a predetermined temperature is set. It is designed to be brazed together by heating. Moreover, the crimping | crimped part provided in one header member is made into the bending piece or nail | claw piece by which the width | variety was made substantially constant, as patent document 1-3 shows.

JP-A-8-29089 JP 2002-181485 A JP 2005-273957 A

  However, in the conventional heat exchanger, the width of the bent piece or claw piece constituting the crimped portion of the header having a two-part structure is substantially constant. For this reason, if it is going to press-fit two members which comprise the header of a division | segmentation structure firmly, the width | variety of a crimping part must be enlarged, and excessive force will be needed when crimping. As a result, it is difficult to manufacture the header, and excessive equipment is required for caulking, resulting in increased manufacturing costs of the header and the heat exchanger.

  The present invention has been made in view of such circumstances, and facilitates the manufacture of a header having a two-part structure, and does not require excessive equipment, and can reduce the manufacturing cost. The purpose is to provide.

In order to solve the above-described problems, the heat exchanger of the present invention employs the following means.
That is, the heat exchanger according to the present invention is a heat exchanger in which a large number of heat exchange tubes are arranged in parallel between a pair of cylindrical headers arranged at predetermined intervals. A semi-cylindrical first header member in which a large number of heat exchange tube insertion holes for inserting the end portions are provided along the length direction, and a semi-cylindrical shape coupled to the first header member to constitute the header And a caulking portion that is caulked to the other side is provided on one of the first header member and the second header member, and the caulking portion has a width of a root portion. It is characterized by being made smaller than the width of the tip.

  According to the present invention, a pair of cylindrical headers arranged at a predetermined interval is a semi-cylindrical shape in which a large number of heat exchange tube insertion holes for inserting end portions of the heat exchange tubes are provided along the length direction. The first header member and a semi-cylindrical second header member coupled to the first header member to form a header, on one side of the first header member or the second header member, on the other side A caulking portion to be caulked is provided, and the caulking portion has a base portion whose width is smaller than the width of the tip portion, so that the first header member or the second header member constituting the header of the divided structure When one of the two is crimped to the other side, since the width of the root portion is reduced, the force necessary to crimp the crimped portion can be reduced and the crimping can be facilitated. Moreover, since the width | variety at the front-end | tip part side of the crimping part is made wider than the width | variety of a base part, while it can fully receive the force which the 1st and 2nd header members try to separate, The part can be easily caulked (easily bent). Accordingly, it is possible to easily manufacture a header having a divided structure, and it is possible to reduce the manufacturing cost of the header and the heat exchanger without requiring excessive equipment. In addition, the pressure resistance of the divided structure header can be increased.

  Furthermore, the heat exchanger according to the present invention is characterized in that, in the heat exchanger described above, the caulking portion has a width on the tip end side that is at least twice the width of the root portion.

  According to the present invention, since the caulking portion is at least twice as wide as the width of the root portion, the force required to caulk the caulking portion and the first and second header members The holding force can be set appropriately so that they are not separated from each other. In other words, if you try to reduce the caulking force, the holding force will become too weak, and if you try to increase the holding force, the caulking force will become too large. Can be made. Therefore, it is possible to facilitate the manufacture of a header having a divided structure and to ensure good quality as a heat exchanger.

  Furthermore, the heat exchanger according to the present invention is the heat exchanger according to any one of the above-described heat exchangers, wherein the caulking portion has both half-cylindrical longitudinal end edges of either the first header member or the second header member. Staggeredly arranged at predetermined intervals in the part.

  According to the present invention, the caulking portions are staggered at predetermined intervals at the half-cylindrical longitudinal end portions of either the first header member or the second header member. When punching one of the first header member and the second header member on which the caulking portion is provided, the caulking portion is arranged in a staggered manner so that the punching interval between the members is reduced, and the header is accordingly increased. The punching loss of the material can be reduced. Therefore, the amount of header material used can be reduced, and the cost can be reduced.

  According to the present invention, when one of the first header member or the second header member constituting the header of the divided structure is caulked to the other side, the width of the root portion is reduced, so that the caulking portion is caulked. The force required to do this can be reduced and caulking can be facilitated. Moreover, since the width | variety at the front-end | tip part side of the crimping part is made wider than the width | variety of a base part, while it can fully receive the force which the 1st and 2nd header members try to separate, Since the portion can be easily caulked (easily bent), it is possible to easily manufacture a header having a divided structure, and it is possible to reduce the manufacturing cost of the header and the heat exchanger without requiring excessive equipment. it can. In addition, the pressure resistance of the divided structure header can be increased.

It is a perspective view of the heat exchanger which concerns on 1st Embodiment of this invention. It is the perspective view which expanded a part of header part of the heat exchanger shown in FIG. It is a side view of a part of header of the heat exchanger shown in FIG. It is the top view which looked at the header shown in FIG. 3 from upper direction. It is a side view of the 1st header member which comprises the header shown in FIG. It is a block diagram (A) and (B) which show the state of the die-cutting at the time of punching out the 1st header member in which the caulking part of the heat exchanger which concerns on 2nd Embodiment of this invention is provided.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 shows a perspective view of the heat exchanger according to the first embodiment of the present invention, and FIG. 2 shows an enlarged perspective view of a part of the header portion.
As shown in FIG. 1, the heat exchanger 1 includes a pair (two pairs) of cylindrical headers 2 and 3, a large number of heat exchange tubes 4 having a flat cross-sectional shape, and a corrugate that is bent into a corrugated shape. The fins 5, the side plates 6 and 7 provided on both sides of the laminated heat exchange tubes 4 and the corrugated fins 5, the refrigerant inlet flange 8 and the refrigerant outlet flange 9 provided on one header 2, And a receiver 10 provided on the other header 3.

  This heat exchanger 1 is used as a condenser in a vehicle air conditioner, and each of the above members is made of an aluminum alloy. The pair of headers 2 and 3 are cylindrical bodies that are arranged at predetermined intervals and sealed at both ends, and a large number of heat exchange tube insertion holes 13 are provided at predetermined intervals on opposite sides. Yes. Between the pair of headers 2 and 3, a plurality of heat exchange tubes 4 having a flat cross-sectional shape are disposed in parallel to each other in the horizontal direction. The heat exchange tube 4 has a large number of flow paths 4 </ b> A inside, and both ends thereof are inserted into heat exchange tube insertion holes 13 provided on the side surfaces of the headers 2 and 3. Corrugated fins 5 that are bent into a corrugated shape are disposed between the plurality of heat exchange tubes 4.

  Side plates 6 and 7 are disposed on both sides of the core portion constituted by a large number of laminated heat exchange tubes 4 and corrugated fins 5, and are fixed so as to sandwich the corrugated fins 5 from both sides. A refrigerant inlet flange 8 is provided in the upper part of one header 2 so as to communicate with the inside, and a refrigerant outlet flange 9 is provided in the lower part so as to communicate with the inside. At an appropriate position, at least one set of partition plates (not shown) is provided. The other header 3 is integrally provided with a receiver 10 having a required volume so as to allow the refrigerant to enter and exit from the interior.

  As a result, the refrigerant that has flowed into the header 2 from the refrigerant inlet flange 8 as indicated by the solid line arrow is circulated toward the header 3 through the plurality of heat exchange tubes 4 partitioned by the partition plate. After the U-turn is made, the heat exchange tube 4 is again circulated toward the header 2. During this time, the refrigerant that has been heat-exchanged with the air and condensed is discharged from the refrigerant outlet flange 9 through the header 2 as indicated by a solid line arrow. Further, a part of the condensed refrigerant is stored in the receiver 10 so that the flow rate is adjusted.

  The refrigerant inlet / outlet flanges 8 and 9 are both provided in one header 2, but may be dispersedly installed in the pair of headers 2 and 3, and the partition plate not shown is a refrigerant. As described above, when the U-turn is circulated only once, only one set needs to be provided in one header. However, when the U-turn is circulated a plurality of times, U A plurality of sets may be provided according to the number of turns. Furthermore, when the refrigerant is circulated by making a U-turn a plurality of times, it is desirable to install a partition plate at a position where the number of heat exchange tubes 4 gradually decreases from the inlet side to the outlet side.

  The headers 2 and 3, the heat exchange tubes 4, the corrugated fins 5, the side plates 6 and 7, the refrigerant inlet / outlet flanges 8 and 9, and the receiver 10 are all made of an aluminum alloy, and a required member is a brazing material. A clad material is used, and these members are temporarily assembled as described above, and then each member is integrally coupled by brazing in a furnace. Then, a refrigerant pipe (not shown) is connected to the refrigerant inlet / outlet flanges 8 and 9 provided in the header 2 so that a refrigeration cycle is configured.

  Further, the pair of cylindrical headers 2 and 3 are two-part headers as shown in FIGS. The headers 2 and 3 each have a semi-cylindrical first header member (header plate) 11 in which a large number of heat exchange tube insertion holes 13 into which end portions of the heat exchange tubes 4 are inserted are provided along the length direction. And a semi-cylindrical second header member (tank plate) 12 constituting the headers 2 and 3 by being coupled to the first header member 11. The first header member 11 and the second header member 12 are made by punching a plate material made of aluminum alloy having a predetermined thickness clad with a brazing material, and molding it into a semi-cylindrical body having a U-shaped cross section, The both end edges 12A in the longitudinal direction of the second header member 12 are fitted inside the both end edges 11A in the longitudinal direction of the first header member 11 so that the header space 14 is formed.

  In either of the first header member 11 and the second header member 12, in the present embodiment, at both end edges 11 </ b> A in the longitudinal direction of the first header member 11, as shown in FIG. 3 and FIG. Thus, the caulking portion 15 is integrally stamped and formed. After the second header member 12 is fitted to the first header member 11 as described above, the crimping portion 15 is moved from the two-dot chain line position to the position indicated by the solid line as shown in FIG. 12 is configured to be crimped to be crimped to the outer surface.

  Further, as shown in FIG. 5, the caulking portion 15 is formed of a bent piece having a T shape in which the width W1 of the root portion 15A is smaller than the width W2 of the tip portion 15B (W1 <W2). . Incidentally, the width W2 of the tip portion 15B is at least twice as wide as the width W1 of the root portion 15A. Note that the root portion 15A and the tip portion 15B are parallel quadrilateral shapes, but the shapes may be modified into various shapes within a range in which the relationship of the width dimension of W1 <W2 is maintained. .

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The headers 2 and 3 having a two-part structure in the heat exchanger 1 are coupled to the first header member 11 having a semi-cylindrical shape having a heat exchange tube insertion hole 13 and the first header member 11. The second header member (tank plate) 12 having a semi-cylindrical shape is provided, and crimped portions 15 provided on both end edge portions 11A of the first header member 11 are formed on the outer surface of the second header member 12. They are integrated by crimping so as to be crimped, and are joined by brazing. As shown in FIG. 4, the caulking portion 15 is caulked so as to hold the outer surface of the second header member 12 from both sides so that both members 11, 12 can receive the force to be separated. It has become.

  In the caulking portion 15, the width W1 of the root portion 15A is smaller than the width W2 on the tip portion 15B side. For this reason, when the second header member 12 is caulked with respect to the first header member 11 constituting the headers 2 and 3, it is possible to reduce the force required for the caulking portion 15 to be caulked and to facilitate caulking. Become. Further, since the width W2 of the distal end portion 15B of the caulking portion 15 is wider than the width W1 of the root portion 15A, the force for separating the first header member 11 and the second header member 12 from each other is sufficiently received. While being able to stop, the crimping part 15 can be easily crimped (it is easy to bend).

  As a result, it is possible to easily manufacture the headers 2 and 3 having a two-part structure, and it is possible to reduce the manufacturing costs of the headers 2 and 3 and the heat exchanger 1 without requiring excessive equipment. Further, the pressure resistance of the divided structure headers 2 and 3 can be improved.

  Further, the caulking portion 15 has a width W2 on the tip portion 15B side that is at least twice as large as the width W1 of the root portion 15A. Thereby, the force required to crimp the crimping portion 15 and the force to hold the first and second header members 11 and 12 so as not to be separated from each other can be set appropriately. In other words, in the conventional caulking part where the width is constant, the problem that the holding force becomes too weak when trying to reduce the caulking force, and the caulking force becomes too large when trying to increase the holding force is derived. On the other hand, it is possible to set each force properly to achieve both. For this reason, it is possible to facilitate the manufacture of the headers 2 and 3 having a divided structure and to ensure good quality of the heat exchanger 1.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
This embodiment is different from the first embodiment described above in that the caulking portions 15 are staggered. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In the present embodiment, the caulking portions 15 provided at predetermined intervals on both edge portions 11A of the first header member 11 are configured in a staggered arrangement. In this way, by arranging the crimping portions 15 in a staggered arrangement, as shown in FIG. 6B, when the headers 2 and 3 are formed, the punching interval when punching the first header member 11 from the header material is reduced. It can be made smaller.

  That is, when the first header member 11 is punched from the header material, if the crimped portions 15 of the both end edge portions 11A of the first header member 11 are provided at the same position, as shown in FIG. It is necessary to widen the punching interval L1 so that the caulking portions 15 of the adjacent first header members 11 do not overlap each other. However, by arranging the crimping portions 15 of the both end edge portions 11A in a staggered arrangement, as shown in FIG. 6B, the position of the crimping portion 15 is shifted in the length direction, so the punching interval L2 is reduced. Thus, the first header member 11 can be punched out.

  For this reason, the punching interval of the first header member 11 can be reduced by the difference (L1-L2), and the punching loss of the header material is reduced by an amount corresponding to the dimensional difference of (L1-L2). be able to. Therefore, the amount of header material used can be reduced, and the cost can be reduced.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the caulking portion 15 is provided on the first header member 11 side constituting the headers 2 and 3, and the caulking portion 15 is caulked with respect to the outer surface of the second header member 12. However, conversely, a similar caulking portion may be provided on the second header member 12 side so as to caulk to the outer surface of the first header member 11.

  Further, the fitting structure between the first header member 11 and the second header member 12 is not limited to the structure of the above embodiment, and for example, both the members 11 and 12 are provided with flanges and the flanges are fitted to each other. It is good also as a method to do. Further, in the second embodiment, the embodiment in which the crimping portions 15 are arranged in a staggered manner has been described. However, the present invention includes a configuration in which the crimping portions 15 are arranged at the same position as shown in FIG. Needless to say.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 3 Header 4 Heat exchange tube 11 1st header member 11A Both-ends edge part 12 2nd header member 12A Both-ends edge part 13 Heat exchange tube insertion hole 15 Caulking part 15A Root part 15B Tip part W1 Width of root part W2 Tip width

Claims (3)

In a heat exchanger in which a large number of heat exchange tubes are arranged in parallel between a pair of cylindrical headers arranged at a predetermined interval,
The header is coupled to the first header member having a semi-cylindrical shape having a plurality of heat exchange tube insertion holes for inserting end portions of the heat exchange tubes along the length direction, and the first header member. A semi-cylindrical second header member constituting the header,
Either one of the first header member or the second header member is provided with a crimping portion that is crimped to the other side,
The caulking portion has a root portion whose width is smaller than that of the tip portion.   2. The heat exchanger according to claim 1, wherein the caulking portion has a width on the tip end side that is at least twice the width of the root portion. The said crimping | crimped part is staggeredly arranged by the predetermined space | interval in the both-ends edge part of the longitudinal direction of either one of the said 1st header member or the said 2nd header member. Or the heat exchanger of 2.

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