JP2000220990A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger of high quality for improving brazing properties by easily, effectively temporarily fastening fluid exit/entrance parts formed at a tank to a fluid supply/exhaust tube, while improving a working efficiency of the temporarily fastening in the case of brazing the both. SOLUTION: In the heat exchanger comprising fluid exit/entrance parts 9, 10 formed at a heat exchanger body side, and fluid supply and exhaust tubes 11, 12 connected by engaging the exit/entrance parts, protruding strips 14, 20 protruding toward radial outside are formed at ones of the parts and the tubes, and recess strips 16, 22 capable of being engaged with the protrusion strips are formed at the others.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger which is brazed together in a state where members are temporarily assembled.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a heat exchanger used for a vehicle air conditioner or the like, for example, members constituting the heat exchanger are temporarily assembled (assembled state), and the temporarily assembled heat exchanger is assembled. Are collectively brazed in a furnace. In such a method, it is necessary to perform brazing while accurately maintaining the positional relationship between the members during brazing.

For example, when brazing a fluid inlet / outlet portion of a tank portion on a heat exchanger main body side and a fluid supply / discharge pipe connected to the fluid inlet / outlet portion, both are temporarily fixed by, for example, MIG welding. Or temporary fixing using a fixing jig. However, since the temporary fixing method as described above is complicated, the work efficiency for the temporary fixing may be significantly reduced.

For this reason, for example, Japanese Utility Model Application Laid-Open No. 4-12297.
In Japanese Patent Publication No. 9 (KOKAI), a locking recess is formed in a part of the fluid supply / discharge pipe, and both ends are temporarily fixed by caulking the ends of the fluid port on the heat exchanger body side toward the locking recess. However, the proposal still has a problem that a caulking step is necessarily required.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to significantly improve the working efficiency in temporarily fixing a fluid inlet / outlet portion and a fluid supply / drain pipe, and to temporarily and securely fix both of them. An object of the present invention is to provide a high-quality heat exchanger with improved attachment properties.

[0006]

In order to solve the above-mentioned problems, a heat exchanger according to the present invention is connected to a fluid inlet / outlet portion formed on a heat exchanger body side via a fitting to the fluid outlet / inlet portion. And a fluid supply / discharge pipe, wherein at least one of the fluid inlet / outlet portion and the fluid supply / discharge pipe has a ridge protruding radially outward, and the other has the ridge. And a concave strip which can be fitted to the groove.

In the present invention, the fluid inlet / outlet portion and the fluid supply / discharge pipe can be reliably temporarily fixed only by fitting the convex ridge into the concave ridge. By crimping, a stronger temporary fixing structure can be formed. In addition, if a concave portion that is recessed radially inward is formed in a part of the convex streak forming portion and the concave streak forming portion is swaged toward the concave portion, a more rigid temporary fixing structure can be formed. .

Further, if the above-mentioned convex and concave ridges are formed so as to extend in the respective axial directions of the fluid inlet / outlet portion and the fluid supply / discharge tube, the fitting and connection of the fluid supply / exhaust tube to the fluid inlet / outlet portion are possible. In addition, the convex ridge can be easily fitted into the concave ridge, and the working efficiency at the time of temporary fixing can be further improved.

The above-mentioned concave streak can be easily formed by, for example, pipe expansion.

In the heat exchanger as described above, one of the fluid inlet / outlet portion and the fluid supply / discharge pipe is formed with a ridge projecting radially outward, and the other is fitted with the ridge. Since the recesses that can be combined are formed, simply connecting the fluid inlet / outlet portion and the fluid supply / drain tube allows the concave and convex ridges to be easily fitted, and temporarily connects the fluid inlet / outlet portion and the fluid supply / discharge tube. Can be fixed. Therefore, a strong temporary fixing structure can be easily and reliably formed while improving the working efficiency, so that a high-quality heat exchanger with improved brazing properties can be obtained.

Further, in the present invention, the fluid inlet / outlet portion and the fluid supply / discharge pipe can be reliably temporarily fixed by fitting the convex ridge and the concave ridge. By caulking the forming portion to the ridge forming portion, the temporary fixing strength can be further increased. In this case, if a concave portion is formed in a part of the ridge forming portion and a part of the concave ridge forming portion is swaged toward the concave portion, the temporary fixing strength can be further improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the heat exchanger of the present invention will be described below with reference to the drawings. FIG.
4 to 4 show a heat exchanger according to one embodiment of the present invention. In the figure, reference numeral 1 denotes a heat exchanger body. The heat exchanger body 1 has a core portion in which a plurality of tubes 2 and fins 3 are alternately stacked, and side plates 4 and 5 are provided at both ends of the core portion. Also,
A flow path for a fluid (for example, a refrigerant) is formed in the tube 2, and the tanks 7 and 8 forming the tank unit 6 are communicated via the tube 2.

The tank 6, more specifically the tank 8 forming the tank 6, has a fluid inlet 9 and a fluid outlet 10.
Are formed. A fluid supply pipe 11 is connected to the fluid inlet 9, and a fluid discharge pipe 12 is connected to the fluid outlet 10.

The fluid inlet portion 9 is provided with ridges 13 and 14 projecting radially outward of the fluid inlet portion 9. In addition, concave portions 15 and 16 are formed in a part of the ridges 13 and 14 so as to be depressed inward in the radial direction. Also, at the end of the fluid supply pipe 11 connected to the fluid inlet portion 9 via fitting, concave ridges 17 and 18 which can be fitted to the convex ridges 13 and 14 are provided.
Are formed. The concave streaks 17 and 18 are connected to the fluid supply pipe 11.
Is formed by expanding the end of the tube. In this embodiment, as shown in FIGS.
14, the concave strips 17 and 18 are connected to the fluid inlet 9 and the fluid supply pipe 1
1 in the axial direction.

Further, similarly to the fluid inlet portion 9, the fluid outlet portion 10 is formed with ridges 19 and 20 and a concave ridge 2122. Further, similarly to the fluid supply pipe 11, the ridge 19, the fluid discharge pipe 12 connected to the fluid outlet section 10 via the fitting are provided.
The recesses 23 and 24 that can be fitted to the recess 20 are formed.

The heat exchanger 1 according to this embodiment is temporarily fixed as described below, and each member is brazed. First, each member constituting the heat exchanger body 1 is temporarily fixed. The fluid inlet 9 (fluid outlet 10)
A fluid supply pipe 11 (fluid discharge pipe 12) is fitted to the. At this time, the ridges 13 and 14 (the ridges 19 and 20) and the
18 (concave stripes 23, 24) extend in the axial direction of the fluid inlet 9 (fluid outlet 10) and the fluid inlet pipe 11 (fluid outlet 12), so that the fluid inlet 9 (fluid outlet 10). By simply inserting the fluid supply pipe 11 (fluid discharge pipe 12) into the ridges 13 and 14 (the ridges 19 and 20), the concave ridge 1 is formed.
7, 18 (concave stripes 23, 24) are fitted, and the fluid inlet 9
(Fluid outlet 10) and fluid inlet pipe 11 (fluid outlet pipe 1)
2) is temporarily fixed. In the present embodiment, the outer edge of the fluid inlet 9 (fluid outlet 10) is provided at the outer edge of the recess 25 with which the pipe end of the fluid inlet pipe 11 (fluid outlet pipe 12) engages.
6 (recesses 27 and 28) are formed.

Further, in the present embodiment, after the fluid inlet 9 (fluid outlet 10) and the fluid supply pipe 11 (fluid discharge pipe 12) are temporarily fixed, the ridges 17, 18 (the ridges 23,
24) is swaged by the ridges 13 and 14 (the ridges 19 and 20). Specifically, the concave strips 17, 18
Some of the (concave ridges 23, 24) are convex ridges 13, 14 (convex ridges 1).
9, 20) formed in the recesses 15, 16 (the recesses 21, 2).
2) It is crimped toward the side. Therefore, the movement of the fluid supply pipe 11 (fluid discharge pipe 12) in the removal direction (the direction opposite to the arrow in FIG. 4) is restricted, and a more rigid temporary fixing structure is formed.

In this embodiment, the tank 6
Ridges 13 and 14 on the fluid inlet 9 (fluid outlet 10) on the side
(Convex ridges 19, 20) are formed, and concave ridges 17, 18 (Concave ridges 23, 24) are formed on the fluid supply pipe 11 (Fluid discharge pipe 12), but concave ridges are formed on the fluid port side. However, it is also possible to form a ridge on the fluid supply / discharge pipe side.

[0019]

As described above, when the heat exchanger of the present invention is used, a ridge is formed on one of the fluid inlet / outlet portion and the fluid supply / discharge pipe, and the other can be fitted with the ridge. Since the concave grooves are formed, it is possible to satisfactorily braze the two members firmly and securely by merely fitting the fluid supply and discharge pipes to the fluid inlet / outlet portions.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a connection part between a fluid inlet / outlet part and a fluid supply / discharge pipe of the heat exchanger of FIG.

FIG. 3 is a perspective view of a pipe end of a fluid supply / discharge pipe of the heat exchanger of FIG. 1;

FIG. 4 is an exploded sectional view of a connection portion between a fluid inlet / outlet portion and a fluid supply / discharge pipe of the heat exchanger of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger main body 2 Tube 3 Fin 4, 5 Side plate 6 Tank part 7, 8 Tank 9 Fluid inlet part 10 Fluid outlet part 11 Fluid supply pipe 12 Fluid discharge pipe 13, 14, 19, 20 Convex stripes 15, 16, 21, 22 recess 17, 17, 23, 24 recess 25, 26, 27, 28 recess

Claims (6)

[Claims] 1. A heat exchanger having a fluid inlet / outlet formed on a heat exchanger body side and a fluid supply / discharge pipe connected to the fluid inlet / outlet via a fitting. A heat exchanger, characterized in that one of the supply and discharge pipes has a ridge protruding radially outward, and the other has a ridge that can be fitted to the ridge. 2. The heat exchanger according to claim 1, wherein said concave streak forming portion is caulked to said convex streak forming portion. 3. A concave portion which is depressed radially inward in a part of the convex streak forming portion, and a part of the concave streak forming portion is caulked toward the concave portion side. 2 heat exchanger. 4. The heat exchanger according to claim 1, wherein the ridges and the valleys extend in respective axial directions of a fluid inlet / outlet portion and a fluid supply / discharge pipe. 5. The method according to claim 1, wherein the concave streak is formed by expansion.
The heat exchanger according to claim 1. 6. The heat exchanger according to claim 1, wherein the fluid port is formed in a tank of the heat exchanger.