JPS6151230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid receiver for a refrigeration system, and more particularly to a liquid receiver that allows the state of a refrigerant to be observed through a sight glass suitable for an air conditioner for an automobile.

An improved version of the conventional sight glass body is known, for example, as shown in FIG. 1 of Japanese Unexamined Patent Publication No. 54-57258. According to the above-mentioned conventional examples, the pipe body to which the sight glass and refrigerant inlet/outlet joint are attached and fixed is mostly formed by cutting a bar material.
Not only is the weight heavier than necessary, but there is a high possibility that chips generated during cutting will remain.In particular, these chips will enter the equipment along with the refrigerant, resulting in clogging of pipes or hindering the operation of pipes, etc. .

Moreover, since only the bending board is made of steel,
Welding work is required to connect it to the pipe body,
Due to the weight of the head, stresses such as vibrations are concentrated on the joint, and there remains the problem of damage.

On the other hand, Japanese Utility Model Application Publication No. 51-152153 discloses installing a joint for a refrigerant discharge port and a joint for attaching auxiliary equipment on the sight glass body, but in addition to the above problem, the joint seat must be cut into a flat surface. The structure is completely unsuitable for mass production. Also, no consideration is given to compatibility of auxiliary equipment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid receiver for a refrigeration system equipped with a sight glass body that is lightweight, highly reliable, and allows for compatible attachment of auxiliary equipment.

In the present invention, a cylindrical protrusion is formed integrally with an upper bending plate made of a steel plate, a sight glass holder is fixed on the upper surface of the cylindrical protrusion, and a joint for a refrigerant discharge port is airtightly fixed on one of the surrounding planes. , the auxiliary joint seat is fixed to the other side of the peripheral plane, and the refrigerant passage pipe is further fixed to the inner peripheral end of the opening via a bush.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. In the figure, a cylindrical body 1 made of steel plate
connects both ends to the lower bending board 2 and the upper bending board 3.
The middle part is partitioned by upper and lower strainers 5 and 6 filled with desiccant 4.
The strainers 5 and 6 have the function of removing moisture, dust, etc. from the refrigerant. Furthermore, a joint 7 for introducing refrigerant is connected and fixed to the side surface of the main body 1, and strainers 5 and 6 are connected to the center of the main body 1.
A refrigerant passage pipe 8 is disposed to penetrate through the refrigerant passage pipe 8.

The upper bending plate 3 is formed by drawing a single steel plate to integrally form a cylindrical protrusion 9 on the upper side.
A holder 12 of a sight glass 11 is airtightly fixed to the mounting hole 10 on the upper surface of the cylindrical protrusion 9 through a brazing material, and the surrounding area is, for example, rectangular as shown in FIG. 9c and 9d are formed, and a refrigerant discharge joint 13 is formed on this plane 9a.
As above, they are airtightly fixed via brazing material. Further, joint seats 14 each having an internal diameter thread of the same size are fixed airtightly to the other plane, and a fusible plug 15, a pressure switch 16, and a safety valve 17 are connected to the cylindrical protrusion through a ring. The sight glass 11 is heated and welded to the sight glass holder 12 on the upper surface of the sight glass 8 at a temperature lower than the brazing welding temperature. Furthermore, the upper bending plate 3 is fitted to the upper end of the main body 1, the upper end of the pipe 8 is fitted to the metal bushing 18, and the upper end is fitted and fixed inside the pipe bushing insertion part 19 which is the lower part of the cylindrical projection. are doing. The desiccant 4 is inserted from below the main body 1 after installing a strainer 5 and is held by a strainer 6. Of course, the strainers 5 and 6 are passed through the pipe 8 and positioned relative to each other. and,
The upper and lower cover plates 2 and 3 are simultaneously welded to the upper and lower ends of the main body 1.

With this structure, the refrigerant cooled by the cooler is received from the joint 7, moisture etc. are removed by the strainers 5 and 6, and then sent out from the joint 14 through the pipe 8 from the bottom of the main body. At this time, the normal state is that the refrigerant is sent out in a liquid phase, but this situation is observed through the sight glass 11 that seals the upper end of the refrigerant passage 20. That is, the liquid receiver separates the refrigerant into gas and liquid, stores excess refrigerant, and removes moisture, thereby allowing the refrigeration cycle to operate smoothly.

In the above embodiment, the sight glass holder 12 is directly attached to the upper surface of the cylindrical protrusion 9 of the upper bending plate 3.
Since the joint 13 can be attached to one side of the peripheral plane, there is no need to attach an exaggerated sight glass body as in the conventional case. This greatly reduces the cutting process, making it possible to manufacture the liquid receiver at low cost, and also helping to reduce the weight of the liquid receiver. Therefore, even if vibrations are applied to the cylindrical protrusion, there is no need to worry about the weld coming off from the cover plate.

Furthermore, in the liquid receiver of the present invention, the upper bending plate, the sight glass holder, the joint mounting part, and the joint seat mounting part can be manufactured at low cost by press working, and the cylindrical protrusion is provided with flat parts on four sides. By installing dexterous joint seats and standardizing the auxiliary equipment mounting screws to the ○ ring seal type, you can freely install auxiliary equipment such as fusible plugs, pressure switches, or safety valves anywhere on the flat surface. This has the advantage that it can be attached to.

As described above, according to the present invention, a cylindrical portion having at least two or more flat surfaces is integrally formed on the cylindrical projection portion of the upper bending plate made of a steel plate, and the auxiliary equipment joint seat is fixed to the flat surface together with the exit side passage joint. death,
Furthermore, the mounting screws for the auxiliary joint seat are unified to ensure compatibility when installing auxiliary equipment, making it lightweight and highly reliable, and equipped with a sight glass body that allows you to freely choose the mounting direction of auxiliary equipment. A liquid receiver for a refrigeration system can be easily provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the entirety of a liquid receiver according to an embodiment of the present invention, and FIG. 2 is a top view of FIG. 1. 1...Main body, 2...Lower bending plate, 3...Upper bending plate, 8...Pipe, 9...Cylindrical projection, 9a
~9d... Plan view, 15... Fusible plug (auxiliary device), 1
7... Safety valve (auxiliary equipment), 18... Metal bushing.

Claims (1)

[Claims] 1. In a liquid receiver for a refrigeration system, an outlet-side refrigerant passage is formed in the upper part of the liquid receiver body through an upper bending plate, and the refrigerant flowing through the passage can be directly viewed through a sight glass. A sight glass holder is formed from a steel plate integrally formed with a central cylindrical projection having at least two peripheral surfaces as flat surfaces, and a sight glass is fixed on the upper surface of the cylindrical projection, and on one surface of the flat surface is a sight glass holder. Joints for refrigerant discharge ports are each airtightly fixed, a joint seat for auxiliary equipment is formed on the other surface of the plane, and a removable auxiliary equipment joint seat is formed, and a refrigerant passage pipe is further secured to the inner peripheral end of the opening via a bush. A liquid receiver for a refrigeration device characterized by: