JP2005257168A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress tank deformation in a recessed part 224 vicinity due to an internal pressure in a heat exchanger formed with the recessed part 224 for avoiding interference with another apparatus 3. <P>SOLUTION: The heat exchanger is composed such that by extending the recessed part 224 to a position deviated three millimeters or more toward a core plate 21 side than a portion B most nearest to a side wall surface 222 in the other apparatus 3, a range of the recessed part 224 is enlarged, a deforming direction cross sectional secondary moment of the recessed part 224 is increased, rigidity is improved, and the tank deformation in the recessed part 224 vicinity due to the internal pressure is suppressed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger, and is suitable for a radiator that cools cooling water by exchanging heat between cooling water and air of a water-cooled internal combustion engine.

  As shown in FIGS. 4 and 5, the conventional radiator includes a tank 2 communicating with a plurality of tubes 1, and the tank 2 is bonded to the core plate 21 to which the tubes 1 are bonded and the core plate 21 to be cooled. It has a tank body 22 that forms a tank space 23 filled with water.

  When another device 3 (capacitor pressure switch in the example of FIG. 5) is disposed near the tank 2 of the radiator, a portion of the tank 2 facing the other device 3 is partially recessed to form a recess 224. By doing so, interference with other devices 3 is avoided. More specifically, the gap is about 2 mm between the side wall surface 222 of the tank 2 and the other device 3 (the other device 3—the shortest distance between the side wall surface 222 of the tank 2).

  However, in such a structure, there is a problem that tank deformation (here, warpage of the side wall surface 222 is a main deformation) easily occurs. More specifically, there is a problem that the tank deformation near the concave portion 224 is large and leakage from the caulked portion of the core plate 21 occurs. Incidentally, this deformation is a deformation in the vertical direction X of the side wall surface 222 due to an internal pressure generated by the flow of cooling water in the tank 2 acting in a direction perpendicular to the inner wall of the tank.

  In view of the above points, an object of the present invention is to suppress tank deformation near a recess due to internal pressure.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of tubes (1) through which a fluid flows and a longitudinal direction end of the tube (1) are positioned on the longitudinal end side of the tube (1). The tank (2) includes a core plate (21) and a core plate (21) to which the tube (1) is joined. And a tank body (22) that forms a tank space (23) filled with fluid. The tank body (22) has a rectangular parallelepiped shape with one surface opened, and an open surface. The core plate (21) is joined to the opposite surface (221) facing the core plate (21) and the side wall surface (222) connecting the core plate (21) and the opposite surface (221). Other equipment located in the vicinity 3) In order to avoid interference with 3), the concave portion (224) recessed toward the tank space (23) is a heat exchanger formed on the side of the side wall surface (222) close to the facing surface (221). The concave portion (224) extends to a position shifted by 3 mm or more toward the core plate (21) side from the portion (B) closest to the side wall surface (222) in the device (3). To do.

  According to this, the range of the recess is expanded, the deformation second-order moment in the deformation direction of the recess is increased, the rigidity is improved, and the tank deformation near the recess due to the internal pressure is suppressed.

  As in the invention described in claim 2, from the position (B) closest to the side wall surface (222) in the other device (3), to a position shifted by 5 mm or more toward the core plate (21) side, The recess (224) may be extended. Moreover, you may extend a recessed part (224) to the vicinity of a core plate (21) like invention of Claim 3.

  In the invention according to claim 4, the recess height (h) from the side wall surface (222) to the tank space (23) side in the recess (224) is 1.1 times or more the plate thickness of the side wall surface (222). It is characterized by being. According to this, the effect of the invention of claim 1 can be surely obtained.

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

  An embodiment of the present invention will be described. In this embodiment, the heat exchanger according to the present invention is applied to a radiator that cools cooling water of a water-cooled engine (internal combustion engine) that is a driving source for vehicle travel. 1 is a perspective view of a main part of a heat exchanger according to an embodiment, FIG. 2 is a cross-sectional view of a section A of the heat exchanger shown in FIG. 1, and FIG. 3 is a schematic perspective view of a tank side wall surface.

  As shown in FIG. 1 and FIG. 2, the heat exchanger has a large number of tubes 1 through which cooling water flows, and distributes and supplies cooling water to each tube 1 or finishes heat exchange with air and then each tube. 1 and a tank 2 that collects and collects the cooling water flowing out from the tank 1.

The tube 1 is made of aluminum and has a flat cross-sectional shape.
One tank 2 is provided at each end in the longitudinal direction of the tube 1 and extends in a direction perpendicular to the longitudinal direction of the tube to communicate with each tube 1.

  The tank 2 includes an aluminum core plate 21 into which the tube 1 is inserted and fixed, and a resin tank body 22 that forms a tank space 23 in the tank 2 together with the core plate 21.

  The tank body 22 has a rectangular parallelepiped shape with one surface opened, and the core plate 21 is fixed to the opened surface by caulking. The tank body 22 includes a facing surface 221 that faces the core plate 21, and a side wall surface 222 that connects the core plate 21 and the facing surface 221. Further, a large number of ribs 223 are formed on the opposing surface 221 and the side wall surface 222.

  A condenser pressure switch 3 constituting a refrigeration cycle is disposed in the vicinity of the tank 2 of the heat exchanger. In order to avoid interference with the pressure switch 3, a concave portion 224 recessed toward the tank space 23 is provided on the side. The wall 222 is formed on the side close to the facing surface 221. The pressure switch 3 corresponds to another device of the present invention.

  The recess 224 extends toward the core plate 21 starting from the opposing surface 221. More specifically, the recess 224 is closer to the core plate 21 than the portion B closest to the side wall surface 222 in the pressure switch 3. It extends to a position shifted by 3 mm or more.

  Desirably, the recess 224 extends to a position shifted by 5 mm or more from the portion B closest to the side wall surface 222 in the pressure switch 3, and more desirably, the recess 224 extends to the vicinity of the core plate 21. It should be extended.

  Further, as shown in FIG. 3, the height h of the recess 224 from the side wall surface 222 to the tank space 23 side is 1.1 times or more the plate thickness of the side wall surface 222.

  The heat exchanger having the above configuration can increase the strength by providing the recess 224. As shown in FIG. 3, the tank material thickness Y with respect to the deformation direction X is partially increased by providing the recess 224. As a result, the second moment in the deformation direction of the recess 224 is increased and the rigidity is improved. It is to do.

  Stress analysis and the like of the heat exchanger of the present embodiment configured as described above and a conventional heat exchanger were performed by FEM (finite element analysis). When the deformation amount of the core plate 21 is compared with the deformation amount of the core plate 21, the deformation amount of the core plate 21 is compared. As a result, in the heat exchanger of the present embodiment, the maximum deformation amount of the core plate is reduced by 23% at the maximum.

(Other embodiments)
In the said embodiment, although the heat exchanger which concerns on this invention was used for the radiator for water-cooled internal combustion engines, this invention is applicable also to the heat exchanger of another use.

It is a perspective view of the principal part of the heat exchanger which concerns on one Embodiment of this invention. It is sectional drawing of the principal part of the heat exchanger of FIG. It is a typical perspective view of a tank side wall surface. It is a perspective view of the principal part of the conventional heat exchanger. It is sectional drawing of the principal part of the conventional heat exchanger.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tube, 2 ... Tank, 3 ... Pressure switch (other apparatus), 21 ... Core plate, 22 ... Tank main body, 23 ... Tank space, 221 ... Opposite surface, 222 ... Side wall surface, 224 ... Recessed part.

Claims (4)

A plurality of tubes (1) through which fluid flows;
A tank (2) located on the longitudinal end of the tube (1), extending in a direction perpendicular to the longitudinal direction of the tube (1) and communicating with the plurality of tubes (1);
The tank (2) includes a core plate (21) to which the tube (1) is joined, and a tank body (22) that is joined to the core plate (21) to form a tank space (23) that is filled with fluid. Configured with
The tank body (22) has a rectangular parallelepiped shape with one surface opened, and the core plate (21) is joined to the opened surface, and the opposing surface (221) facing the core plate (21). And a side wall surface (222) connecting the core plate (21) and the facing surface (221),
In order to avoid interference with other equipment (3) located in the vicinity, the concave portion (224) recessed toward the tank space (23) side is closer to the opposite surface (221) on the side wall surface (222). Formed heat exchanger, comprising:
The concave portion (224) extends to a position shifted by 3 mm or more toward the core plate (21) side from the portion (B) closest to the side wall surface (222) in the other device (3). A heat exchanger. The concave portion (224) extends to a position shifted by 5 mm or more toward the core plate (21) side from the portion (B) closest to the side wall surface (222) in the other device (3). The heat exchanger according to claim 1, wherein: The heat exchanger according to claim 1 or 2, wherein the recess (224) extends to the vicinity of the core plate (21). The recess height (h) from the side wall surface (222) to the tank space (23) side in the recess (224) is 1.1 times or more the plate thickness of the side wall surface (222). The heat exchanger according to any one of claims 1 to 3.

Images