JPH10318631A - Manufacturing method for liquid receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and to reduce costs by providing a bottom part that blocks one end of a cylindrical case and a lid part where refrigerant inlet and outlet are formed, and by engaging one end to the refrigerant outlet of the lid part for mounting a suction pipe with a metal filter. SOLUTION: When a liquid receiver 1 that temporally stores a liquid refrigerant is manufactured, one end of a refrigerant suction pipe 5 is fit and secured to a refrigerant outlet 7 of a lid part 4 while a filter 6 is engaged and fixed to the other part of the refrigerant suction pipe 5. At this time, for example, a ring being made of brazing materials lies between one end of the refrigerant suction pipe 5 and the refrigerant outlet 7, and the ring and other part are brazed in one piece on brazing in a furnace. Then, the lid part 4 where the refrigerant suction pipe 5 is secured and a bottom part 3 are mounted to the opening parts of one and the other ends of a cylindrical case 2, respectively, and are brazed in the furnace. After that, a desiccant 9 being put into a bag in a stick shape is inserted from a refrigerant inlet 8 into an equipment body for receiving liquid for completing the liquid receiver 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid receiver which is provided downstream of a condenser of a vehicle air conditioner and temporarily stores a liquid refrigerant.

[0002]

2. Description of the Related Art As a conventional liquid receiver, for example, Japanese Unexamined Patent Publication No.
No. 249550 discloses a tank 1 having an open upper end and a filter locking portion 4 at an intermediate position in the height direction.
Refrigerant suction pipe 2 which is disposed at the center of the tank 1
A receiving member 24 having a through hole 27 for sucking refrigerant and attached to a lower end portion of the suction pipe 23 and abutting against a bottom central portion 22 of the tank 1 to support the suction pipe 23 at the center of the tank; , A desiccant 30 is filled therein, and the
A filter portion 40 supported on the filter locking portion 4 and held in the tank 1; a refrigerant inlet 32 and a refrigerant outlet 33;
And an upper end of the tank 1 having a center joint port 34 which communicates with the outlet and is inserted into the upper end of the suction pipe 23 and which is provided with a sealing member for hermetically sealing the upper end of the suction pipe 32 at the joint. And a header 31 fitted and fixed in the opening.

[0003]

However, in the above cited reference, it is necessary to weld the joint between the header 3 and the tank 1 after each part is mounted on the tank, which requires a lot of man-hours. In addition, in order to produce a large amount by brazing in a furnace, the desiccant contained therein and the heat resistance of the filter have been a problem.

[0004] Therefore, an object of the present invention is to provide a method of manufacturing a liquid receiver that enables mass production of the liquid receiver.

[0005]

Accordingly, the present invention provides a cylindrical case, a bottom for closing one end of the case, a lid formed with a refrigerant inlet and a refrigerant outlet, and one end of the lid. And a suction pipe fitted with a metal filter and brazed together in a furnace,
The present invention resides in that a desiccant is inserted from the refrigerant inlet (Claim 1).

Accordingly, the filter is made of metal, the suction pipe to which the filter is fixed is fitted to the refrigerant outlet, and the cylindrical case is formed by the lid fitted with the suction pipe and the bottom. By closing both open ends and brazing in a furnace, and then inserting a desiccant from the refrigerant inlet of the lid, a liquid receiver can be formed, thereby enabling mass production.

In the present invention, the desiccant may be formed in a bar shape after being packed in a bag. The desiccant particles may be packed in a bag, and then the opening may be closed and stored in the case (claim 3). Thereby, since the insertion of the desiccant can be automated, mass production of the liquid receiver becomes possible, and the production efficiency is improved.

[0008]

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

In the first embodiment shown in FIGS. 1 and 2, a liquid receiver 1 includes a cylindrical case 2, a bottom 3 for closing a lower end opening of the cylindrical case 2, and the cylindrical case 2. 2, a lid 4 having a refrigerant outlet 7 and a refrigerant inlet 8 formed therein, a refrigerant suction pipe 5 having one end fitted to the refrigerant outlet 7, and a refrigerant suction pipe 5. And a desiccant 9 contained in the liquid receiver 1.

In the liquid receiver 1 having the above-described structure, first, a filter 6 formed by a metal wire mesh is fitted to one end of the refrigerant suction pipe 5. At this time, the connection portion 24 between the refrigerant suction pipe 5 and the filter 6 is fixed by caulking. Next, the other end of the refrigerant suction pipe 5 having one end to which the filter 6 is fixed is fitted to the refrigerant outlet 7 of the lid 4. The connection 23 between the other end of the refrigerant suction pipe 5 and the refrigerant outlet 7 may be engaged by screwing or the like,
A ring made of a brazing material may be interposed between the other end of the refrigerant suction pipe 5 and the refrigerant outlet 7 so as to be brazed integrally with other parts during brazing in a furnace described below. It is.

Then, the lid 4 to which the refrigerant suction pipe 5 is fixed or temporarily assembled is assembled to one end opening of the cylindrical case 2, and the bottom 3 is assembled to the other end opening of the cylindrical case 2. And brazing in a furnace. The cylindrical case 2 is formed by forming a brazing sheet coated with a brazing material into a cylinder by roller molding and cutting the brazing sheet at a predetermined length. As a result, the joint 20 between the cylindrical case 2 and the bottom 3 and the joint 21 between the cylindrical case 2 and the lid 4 are joined by the brazing material to form the liquid receiver main body. Alternatively, the cylindrical case 2 may be formed of a normal plate material, and a brazing material may be disposed at the joints 20 and 21.

In the first embodiment, the desiccant is packaged in a stick shape having a smaller diameter than the refrigerant inlet 8, and the desiccant passes through the refrigerant inlet 8 of the receiver main body. And a liquid receiver 1 is formed therein. Thereby, as shown in FIG. 2, the liquid receiver 1 in which the desiccant 9 is stored in the liquid refrigerant 10 is configured.

In the second embodiment shown in FIGS. 3 and 4, since the structure and the forming method of the liquid receiver main body are the same as those of the first embodiment, the same reference numerals are used for the description. Is omitted.

In the second embodiment, the granular desiccant 1
The bag 2 is packed in a bag 11 inserted from the refrigerant inlet 8 into the main body of the receiver through an opening 13 of the bag 11 via a funnel-shaped device 13. Then, the opening 14 of the bag portion 11 is closed by the closing means 15 and dropped into the main body of the liquid receiver to obtain the liquid receiver 1 shown in FIG. In this case, the bag 11
Is formed of a synthetic fiber formed in a mesh shape. As the closing means, a string made of synthetic fiber or a metal ring can be considered.

[0015]

As described above, according to the present invention, the filter mounted on the refrigerant suction pipe is made of metal, and the cylindrical case, the lid, the bottom, and the refrigerant suction mounted on the lid are provided. Pipes and brazing are integrated in a furnace, and then a desiccant is inserted, which can improve production efficiency and enable mass production because the cylindrical case can be formed from plate material. It is what becomes. Thereby, cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a process of inserting a desiccant in a liquid receiver according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid receiver according to the first embodiment of the present invention.

FIG. 3 is an explanatory cross-sectional view showing a process of inserting a desiccant in a liquid receiver according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a liquid receiver according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid receiver 2 Cylindrical case 3 Bottom part 4 Cover part 5 Refrigerant suction pipe 6 Filter 7 Refrigerant outlet 8 Refrigerant inlet 9 Desiccant 10 Liquid refrigerant 11 Bag part 12 Desiccant

Claims (3)

[Claims] 1. A cylindrical case, a bottom for closing one end of the case, a lid formed with a refrigerant inlet and a refrigerant outlet, and one end fitted to the refrigerant outlet of the lid, A method for manufacturing a liquid receiver, comprising: brazing a suction pipe having a metal filter together with a suction pipe in a furnace; and inserting a desiccant from the refrigerant inlet. 2. The method for manufacturing a liquid receiver according to claim 1, wherein the desiccant is formed into a rod after being packed in a bag. 3. The desiccant is inserted into the bag after the bag portion is inserted into the coolant inlet, and the desiccant particles are packed into the bag from the opening portion of the bag portion, and then the opening portion is closed and stored in the case. A method for manufacturing a liquid receiver.