JPS6246195A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To permit to secure brazing material uniformly and connect an end plate to a mounting plate surely by a method wherein the end plate as well as the mounting plate are equipped with closely contacting surface and non- contacting surface while the positioning means of the mounting plate is provided on the non-contacting surface. CONSTITUTION:A plurality of stages of tube element and fin are provided alternately in parallel and the end plates are provided at both ends of the stages while outlet and inlet pipes are attached to said end plate through the mounting plate to integrate them. The integrated components are heated in a furnace and are brazed by the melting of the brazing material. Upon brazing, the engaging holes 28a, 28b for positioning of the connecting section 22b of the end plate 4 and the protuberances 33a, 33b for positioning of the mounting plate 30 are on the non-contacting surface, therefore, the flatness of closely contacting surfaces 25a, 25b, 31a, 31b, which are contacting with each other, may be maintained in high. As a result, the brazing material between contacting surfaces may be secured uniformly and sure brazing may be effected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a stacked heat exchanger, and particularly aims at improving the connection of inlet and outlet pipes.

(Prior Art) Conventionally, as shown in FIG. 7, an inlet/outlet pipe provided in a laminated heat exchanger is constructed by fitting an end of the inlet/outlet pipe 37 into a connecting hole 34 of a mounting plate 30. This mounting plate 30 was positioned and joined to the end plate 4 provided at the lower end of one side of the laminated heat exchanger, and was brazed by furnace brazing.

The mounting plate 30 and the end plate 4 are positioned by dowels 41a formed on the mounting plate 30 side.

41b is a fitting hole 40a formed in the end plate 4.

40b.

(Problem to be Solved by the Invention) By the way, in order to reliably join the mounting plate 30 to the end plate 4, the end plate 4 and the mounting plate 3 must be
The flatness of the adhesion surface 27.31 of the end plate 4 or the mounting plate 30 is increased,
During furnace brazing, it is necessary to spread it evenly over both contact surfaces 27 and 31.

However, in conventional joining, the mounting plate 30
A dowel 41a for positioning is provided on the contact surface 31 of the dowel 41a.

41b, and the fitting surface 27 of the end plate 4 has fitting holes 40a, 40b, especially the dowels 4 of the mounting plate 30.
Since 1a and 41b were formed by press working, it was difficult to achieve flatness in the vicinity of the dowels 41a and 41b.

As a result, the degree of adhesion of the adhering surfaces became weak, and during furnace brazing, the brazing material was shifted to one side and parts of the brazing material were broken, resulting in poor bonding of the mounting plate 30 and leakage of refrigerant.

Therefore, in this invention, the flatness of the contact surface between the end plate and the mounting plate is improved, so that the brazing metal can be evenly and evenly secured, and the end plate and the mounting plate can be reliably joined. It is intended to.

(Means for solving the problem) However, the gist of this invention is as follows. In a stacked heat exchanger in which tube elements and fins are alternately arranged in multiple stages, end plates are provided at both ends thereof, and inlet/outlet pipes are attached to the end plates by attachment plates, what are the end plates and the attachment plates? , a contact surface and a non-contact surface are provided, and a positioning means for positioning the mounting plate is provided on the non-contact surface.

(Function) Therefore, since the mounting plate positioning means is provided on the non-contact surface of the end plate and the mounting plate,
The flatness of the contact surface is maintained high without being affected by the distortion that occurs during processing, and the brazing metal can be evenly distributed over the entire contact surface.

It is possible to achieve the above purpose.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, the stacked heat exchanger has tube elements 1.2 and fins 3 stacked in multiple stages alternately, and end plates 4 (only one is shown) arranged on the outside of both ends. It is what it is.

The forming plates 5 and 6 constituting the tube elements 1 and 2 adopt a four-pass method, and have slightly different shapes for the left and right halves.

The 4-bus type heat exchanger has a refrigerant passage as described in the invention shown in Japanese Utility Model Application Publication No. 60-82170 previously submitted by the applicant, and has a refrigerant inlet as described below. Holes 27a, 27b and a refrigerant outlet hole are formed adjacent to end plate 4.

The molded plate 5 used for the left half has shallow recesses 7a and 7b in the center and deep recesses 8a and 8 provided on both sides of the molded plate 5.
a, a projecting wall 9 formed in the longitudinal direction that defines the shallow recesses 7a, 7b and the deep recesses 8a, 8b at the center and rear portions, respectively, and a communicating hole 10 formed in the deep recesses 8a, 8b. The tube element 1 is formed by abutting the molded plates 5, 5 at their joint surfaces, and the tube element 1 has two refrigerant passages 11a in the center.

11b is formed, and the tank 12a communicates with the respective refrigerant passages 11a and llb on both sides thereof.

12b are formed.

The molding plate 6 used for the right half has shallow recesses 13a and 13b in the center and deep recesses 14 provided on both sides.
a, 14 a, and this deep recess 14a.

14b and the shallow recess 13a.

13b and deep recesses 14a and 14b, respectively, are formed in the longitudinal direction with a protruding wall 15 forming a front part and a rear part, but the height of the protruding wall 15 is formed to be lower in the lower part. The molded plates 6.6 are butted together at their joint surfaces to form the tube element 2, which has two refrigerant passages 17a, 17b formed in the center and a tank 18 on both sides. It is formed.

As shown in FIG. 4, the end plate 4 has a flat portion 2.
0, and a joint portion 22a that has stepped portions 21a and 21b at its upper and lower ends and is bent toward the tank side.

22b, and the upper joint part 22a has a protrusion 23 in the longitudinal direction in the center, and reinforcing protrusions 2 on both sides of the protrusion 23.
4 and 24 are formed.

In addition, the joint portion 22b on the lower side has two contact surfaces 25a, 25b that protrude toward the opposite side of the tank, and the contact surfaces 25a, 2
A non-adhering surface 26 with a step is formed between and around the adhering surface toward the tank side from the adhering surface.6 Note that the adhering surfaces 25a and 25b are.

The shape is almost the same as that of the deep recesses 14a and 14b of the molded plate 6, and a fitting relationship is obtained.

Coolant inlet holes 27a, 27b are formed in the center of the contact surfaces 25a, 25b, and
, 2Sb on the non-adhering surface 26.

Fitting holes 2 for positioning the two upper and lower mounting plates 30
8a and 28b are formed.

The mounting plate 30 is also shown in FIGS. 5 and 6, and has a protrusion in the center of the oval-shaped flat plate that protrudes toward the side opposite to the end plate, and has a contact surface 31a.

31b and a non-contact surface 32, and on the non-contact surface 32, positioning protrusions 33a and 33b are vertically formed by cutting and raising the upper and lower ends of the contact surface 32 on the end plate side.

Further, the contact surfaces 31a and 31b have connection holes 34a,
34b is formed and a flange 3 is formed around the hole.
5a and 35b are formed.

The inlet vibe 37a and the outlet vibe 37b are connected to the connection hole 3.
4a and 34b and are brazed. In addition,
The above-mentioned laminated heat exchanger is integrally brazed in a furnace, and includes a molded plate 5°6, an end plate 4,
The mounting plate 30 is made of a so-called clad material whose surface is clad with a brazing material.

In the above configuration, to manufacture a laminated heat exchanger,
First, the molded plates 5 and 6 are joined together. A large number of tube elements 1 and 2 are formed, these tube elements 1 and 2 are stacked with fins 3 interposed in between, end plates 4 are arranged at both ends and fixed with a jig, and a mounting plate 30 is attached to its protrusion 33a. , 33b are fitted into the fitting holes 28a, 28b formed in the end plate 4 and attached to the end plate 4, and furthermore, the inlet vibrator 37a is attached to the end plate 4.
, the outlet vibrator 37b and the connecting hole 34a, respectively.

34b and fixed with a jig to be integrated.

This integrated product is heated in a furnace to melt the brazing material on the surface and perform brazing.

During this brazing, the joint portion 22b of the end plate 4 and the mounting plate 30 are inserted into the fitting holes 28a, 2 which are aligned.
8b, a contact surface 25a on which the protrusions 33a and 33b come into close contact,
25b and 31a, non-adhering surface 26.3 not present in 31b
2 and contacting contact surfaces 25a, 25b and 31a,
The flatness of 31b can be maintained at a high level. As a result, the brazing material on the adhesion surface can be evenly and uniformly secured.

In this example, there are two contact surfaces on the end plate side and two on the mounting plate side, but unlike this example, when only one inlet/outlet pipe is installed,
Naturally, there is only one contact surface.

(Effects of the Invention) As described above, according to the present invention, since the positioning means is provided on the non-contact surface of the end plate and the mounting plate, it is less affected by the distortion that occurs during processing, and the close contact The flatness of the surface is maintained high, and the brazing metal can be evenly applied to the entire contact surface, allowing reliable brazing of the end plate and the mounting plate.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same as above, FIG. FIG. 5 is a front view showing a mounting plate used in an embodiment of the present invention, FIG. 6 is a cross-sectional view of the same, and FIG. 7 is a perspective view showing the prior art. 1...Tube element, 2...Tube element, 3...Fin, 4...End plate, 25
a, 25b...Adhesive surface, 30-...Mounting plate, 3
1a, 31b...close contact surface, 37a...entrance vibe,
37b...exit vibe. jit Figure In2 Figure #i4 Figure 5 Figure 6 Figure 7

Claims (4)

[Claims] 1. In a stacked heat exchanger in which tube elements and fins are alternately arranged in multiple stages, end plates are provided at both ends thereof, and inlet/outlet pipes are attached to the end plates by attachment plates, the end plates and the attachment plates are A laminated heat exchanger comprising a contact surface and a non-contact surface, and a positioning means for positioning a mounting plate on the non-contact surface. 2. 2. The stacked heat exchanger according to claim 1, wherein the positioning means comprises a protrusion formed on the mounting plate and a fitting hole formed on the end plate into which the protrusion is inserted. 3. The protrusions on the mounting plate. The laminated heat exchanger according to claim 2, characterized in that the non-adhering surface is formed with a step difference relative to the adhering surface. 4. 3. The laminated heat exchanger according to claim 2, wherein the fitting hole of the mounting plate is formed on the non-adhering surface with a step difference from the adhering surface.