JPS59157461A - Manufacture of pressure vessel for air cooling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure vessel for a cooling system, such as a receiver tank attached between a condenser and a pressure reducing valve to store liquid refrigerant, or a receiver tank attached between an evaporator and a compressor to store gaseous refrigerant. This relates to a method for manufacturing an accumulator that sucks refrigerant into a compressor.Each part constituting the pressure vessel is made of aluminum or an aluminum alloy, and the joining method for the upper cylinder, joint members, and refrigerant is improved, especially in the vicinity of the joint members. This allows the outlet pipe and inlet pipe to be joined at the same time.

As shown in FIG. 1, a conventional pressure vessel for a cooling device, such as an accumulator, has an upper cylinder 1 made of cold forged or molten aluminum material and has a communication hole 1a.

1b, and the upper tube 2 is formed by pressing a thin plate of aluminum material into a cylindrical shape with a bottom. Communication hole 1a of upper cylinder 1.

A refrigerant outlet pipe 3 and an inlet pipe 4 made of an aluminum material are respectively joined to the refrigerant pipe 1b, and the joints are made at the stepped portions 3a for positioning both pipe numbers.

4a is formed, and after both tubes are fitted into the communication holes 1a, lb, the opening ends 3b, 4b are expanded and fixed to the upper tube 1. The upper cylinder 1 to which the outlet pipe 3 and the inlet pipe 4 are fixed is fitted into the upper cylinder 2, and the fitting part is welded with tungsten inert gas (T''IG?9 contact) to complete the accumulator. It is necessary that the expanded tube portion is securely fixed, and that the respective directions of the U-shaped outlet tube 3 and the L-shaped artificial tube 4 are maintained in predetermined directions.

However, in such a manufacturing method, the expanded tube portion is rapidly heated due to the extremely high temperature heat generated during TIG welding of the upper tube 1 and the upper tube 2 being transferred through the upper tube 1. The expansion and contraction due to heat causes the aluminum to become brittle. Coupled with the fact that the elastic modulus of aluminum is originally small due to the characteristics of aluminum, the tube expansion nozzle of the tube expansion section is weak. For this reason, the vibrations received when the pressure vessel is in use may cause the expansion section to become loose, or the outlet pipe 3 or the inlet pipe 4 may become loose.
It had the disadvantage that it could fall off.

Therefore, in order to eliminate the above-mentioned drawbacks, this invention uses a thin plate crimped with brazing material to manufacture the upper tube, eliminates the expansion of the outlet and inlet tubes, performs furnace brazing, and Another object of the present invention is to provide a method for manufacturing a pressure vessel for a cooling device, which can securely fix an inlet pipe and prevent the outlet pipe and the inlet pipe from loosening or coming off. However, the gist of the present invention is that the 'F! i. Press a plate to form an upper cylinder including a through hole having a cylindrical portion extending inward, and insert a refrigerant outlet pipe and an inlet pipe made of aluminum material from the inside of the through hole. At the same time, a joint member made of aluminum material is seated on the outer part of the through hole,
Thereafter, the assembly including the upper cylinder, the joint member, the outlet pipe, and the inlet pipe is heated in a furnace, and the joint member, the outlet pipe, and the inlet pipe are brazed to the upper cylinder with the brazing material of the upper cylinder. It involves processes. Therefore, unlike in the past, the outlet pipe and the first inlet pipe are not expanded and joined to the upper cylinder, but are firmly fixed by brazing, which makes it possible to achieve the above-mentioned problems. .

Examples of this invention will be described below with reference to the drawings.

In FIGS. 2 and 3, the upper cylinder I is formed by pressing a thin plate of aluminum material with a brazing filler metal (brazing seam) crimped onto one side, and a cylindrical portion 6 extending inward during the processing. Through holes 5a and 5b are formed.

At this time, the brazing material is formed inside the bottomed cylinder. The upper cylinder 2 is also formed into a cylindrical shape with a bottom by pressing a thin plate of aluminum material. The open end 2a of the upper cylinder 2 is slightly enlarged so as to fit on the outside of the upper cylinder 1. The joint members 6a, 6b are also formed from aluminum material,
One front end 7 is a stepped portion having an outer diameter approximately the same as the diameter of the through holes 5a, 5b for positioning when fitting into the through holes 5a, 5b. The refrigerant outlet pipe 3 and inlet pipe 4 are also made of aluminum material,
Through hole 5a.

The stepped portion 3a is used for positioning when inserted into the portion 5b.

4a is formed.

When manufacturing the accumulator, the through hole 5a of the upper cylinder 1 is
, 5b are fitted into the refrigerant outlet pipe 3 and inlet pipe 4 from the inside direction until the respective step portions 3a and 4a abut the edges of the through holes 5a and 5b, and from the outside direction of the upper cylinder l, the joint member 6a,
The opening end 7 of the joint member 6b is inserted into the through holes 5a and 5b to complete the joint member 6. The end surfaces 8 of a and 6b are seated on the outer part of the upper cylinder 1. Then, the upper cylinder 1 is further fitted into the open end 2a of the upper cylinder 2. When these assemblies are heated in a furnace, the brazing filler metal crimped to the outer surface of the upper cylinder 1 melts, as shown by B in FIG.
and between the cylindrical portion 6 of the through hole 5a+5b and the outlet pipe 3. A fillet is formed around the outer periphery of the inlet pipe 4 and its vicinity, and both pipes and the joint member are brazed to the upper cylinder. At the same time, the opening @2a of the upper cylinder 2 and the fitting portion of the upper cylinder 1 are also brazed.

In addition, when connecting the upper cylinder to the upper cylinder, if the drying material is stored in the upper cylinder and cannot withstand the heat in the furnace, connect the joint member, outlet pipe, and inlet pipe to the upper cylinder in the furnace. , the upper cylinder and the upper cylinder may be welded together by IG welding.

Although the accumulator was described in this embodiment,
A receiver tank having a similar configuration can also be manufactured using exactly the same method.

As described above, the pressure vessel of the present invention is formed by pressing a thin plate made of aluminum material with a brazing material crimped onto one surface to form an upper cylinder including a through hole having a cylindrical portion. Inserting the outlet pipe and the artificial pipe inside the hole,
Connected to the outside part of the through hole.

The hand member is seated, heated in an oven, and bonded to the upper cylinder using brazing material, which eliminates the need to connect the outlet and inlet pipes to the communication holes in the upper cylinder by expanding the pipes as in the past. First, loosening due to heat processing and coming off due to vibration can be reliably prevented, and the lack of function as a pressure vessel and shortening of product life can be avoided. Furthermore, manufacturing costs can be reduced by eliminating processing steps.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional pressure vessel, FIG. 2 is a sectional view of a pressure vessel according to the present invention, and FIG. 3 is an enlarged view of essential parts of the present invention. 1...-upper cylinder, 2... upper cylinder, 3... outlet pipe, 4...
... Artificial tube, 5a, 5b... Through hole, 6... Cylindrical part,
6a, 6b... joint members.

Claims (1)

[Claims] An upper cylinder 1 including through holes 5a, 5b having a cylindrical portion 6 extending inward is formed by pressing a thin plate made of aluminum material with a brazing material crimped on one surface, and the through holes 5a,
A refrigerant outlet pipe 3 and an inlet pipe 4 made of aluminum material are fitted from the inside of the jb, and the through holes 5a, 5b are inserted.
Joint members 6a, 6 made of aluminum material are provided on the outer side of the
b is seated, and then the upper cylinder 1, the joint members 5a, 5b
, the assembly having the outlet pipe 3 and the artificial pipe 4 is heated in a furnace, and the joint members 6a, 6b, the outlet pipe 3 and the inlet pipe 4 are soldered to the upper cylinder 1 with the brazing material of the upper cylinder 1. 1. A method of manufacturing a pressure vessel for a cooling device, the method comprising the step of attaching.