JPS6126632Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to the improvement of a noise reduction device for a compressor, and in particular,
The present invention relates to a silencer for a compressor equipped with a suction silencer made of synthetic resin.

(B) Prior Art Conventionally, in this type of silencer for a compressor, there is one in which a suction silencer is made of synthetic resin, as described in Japanese Utility Model Application Laid-open No. 49-87106. This synthetic resin suction muffler is lighter than metal ones, and has excellent heat insulation properties, which minimizes the heating of the suction gas flowing inside the muffler, allowing it to flow densely into the cylinder. Since it can supply gas, it is known that it is suitable for compressors in terms of refrigeration capacity. In addition, in this type of compressor, in order to make the compression elements such as the cylinder and motor case as compact as possible, the muffler is placed on the side of the cylinder where there is a relatively empty space, and the muffler is connected to the inside of the cylinder. There is a type in which these are connected by a U-shaped or L-shaped communicating tube. Therefore, the inventor of the present invention has created a suction muffler in which a U-shaped or L-shaped communicating pipe is integrally formed with synthetic resin, which can achieve both of the above-mentioned advantages and can be handled as a single component. We devised a configuration in which it is placed on the side of the cylinder.

(c) Problems to be solved by the invention However, according to the above configuration, the communicating pipe is formed in a U-shape or L-shape, so when this communicating pipe is formed integrally with the muffler, the following steps must be taken. There are problems as explained and improvement measures are required. First, when molding such a silencer, there are two methods: one method is to butt each container body, which is divided into a part that includes a communicating tube and a part that does not, and a method that matches each container body that is divided by a plane that includes the axis of the communicating tube. One possible method is to butt their bodies against each other. However, according to the former method, the shape of the communicating tube is U-shaped or L-shaped, so the mold for molding has a complicated structure, making it troublesome to manufacture. Although this is easier, there is a problem in that the communicating tube is also divided, resulting in poor sealing performance at the abutting portions of the tubes.

The idea was to create a suction pipe made of synthetic resin that does not complicate the structure of the molding die, making manufacturing troublesome, or deteriorating the sealing performance at the butt part of the communicating pipe. The purpose is to provide a silencer.

(d) Means for solving the problem The present invention consists of a compression element and an electric element housed in a sealed case, and a U-shaped or L-shaped communication pipe made of synthetic resin on the side of the cylinder of the compression element. A silencer for a compressor is provided with a suction silencer integrally formed with a cylinder, and the tip of this communication pipe is inserted into a suction hole of an end plate that closes the opening of the cylinder.
The suction muffler is formed by butting together vessel bodies that are divided along a plane that includes the axis of the communication pipe,
The communication pipe is configured to be press-fitted into the suction hole.

(e) Function The compressor muffling device of the present invention has the above-mentioned configuration, and even if the communicating pipe is U-shaped or L-shaped, the suction muffler having the communicating pipe integrally is manufactured by a simple split mold. This makes it easy to form, and the communicating tube is press-fitted into the suction hole of the end plate.
The adhesion at the abutting portion of the tubes can be improved, and the sealing performance at the abutting portion will not be deteriorated.

(f) Examples Examples of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a hermetic compressor in which a compression element 2 and an electric element 3 are suspended and housed in a hermetic container 4. The compression element 2 includes a motor case 6 with a cylinder 5
, a piston 7 that slides inside the cylinder, a cylinder head 12 that is attached to close the inside of the cylinder 5 and has a valve plate 10 that has a suction valve 8 and a discharge valve 9, and a discharge chamber 11.
It is composed of. 13 is a separate discharge muffler communicating with the cylinder head 12.

Reference numeral 14 denotes a separate type suction silencer made of synthetic resin that is fixed to the motor case 6 with bolts 15. The suction port 16, the locking portion 17, and the communication pipe 18 are integrally formed.

Note that the communication pipe 18 is formed in a U-shape,
Since it is directly connected by press-fitting to a suction hole 19 formed in the valve plate 10, the inside of the cylinder 5 and the suction muffler 14 are brought into direct communication.

In the compressor muffling device configured in this way, the molded surface of the suction muffler 14 is a plane that includes the axis of the communicating pipe 18, so that the shape of the communicating pipe is U.
Even if the shape is in the form of a letter, it can be easily punched out using a small number of molds, and the suction muffler 14 and the communication pipe 18 can be easily formed integrally.

Furthermore, since the communication pipe 18 is directly connected to the suction hole 19 bored in the valve plate 10 by press fitting, it is possible to improve the adhesion of the communication pipe at the abutting part, and the sealing performance at the abutting part can be improved. In addition, the suction gas passing through the communication pipe is not thermally affected by the discharge chamber 11 side of the cylinder head 12, and the ability of the synthetic resin suction muffler 14 can be fully demonstrated.

(g) Effects of the invention As described above, this invention consists of a compression element and an electric element housed in a sealed case, and a U-shaped or L-shaped communication pipe made of synthetic resin on the side of the cylinder of the compression element. In a silencer for a compressor, an integrally formed suction muffler is provided, and the tip of the communicating pipe is inserted into a suction hole of an end plate that closes the opening of the cylinder. It is formed by butting together the bodies that are divided along the containing plane, and the communication pipe is press-fitted into the suction hole. While achieving both the conventional conveniences of supplying as low temperature gas as possible to the cylinder to improve refrigeration capacity and placing the muffler on the side of the cylinder to make the compression element more compact, The communication pipe is integrally formed into one component, which improves the workability of assembling the silencer, and even if the communication pipe is curved like a U-shape, it can be easily cut out using a small number of molds. , it becomes easy to integrally form the suction muffler and the communication pipe. In addition, the communication pipe, which is divided along a plane that includes the axis, is inserted into the suction hole by press-fitting with the respective divided surfaces abutting each other, so that the respective divided surfaces can be brought into close contact and there is no gap between the butted parts. It never happens.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view of a compressor showing an embodiment of the present invention, A and B of Fig. 2 are a front view and a sectional view at the A-A section of a suction muffler showing an embodiment of the present invention;
FIG. 3 is a plan view of essential parts showing an embodiment of the present invention. 1... Hermetic compressor, 2... Compression element, 3...
Electric element, 4... Airtight container, 5... Cylinder, 1
0... Valve plate, 14... Suction muffler, 1
8...Communication pipe, 19...Suction hole.

Claims (1)

[Scope of utility model registration request] A compression element and an electric element are housed in a sealed case, and a suction muffler is provided on the side of the cylinder of the compression element, with a U-shaped or L-shaped communication pipe integrally formed of synthetic resin, and a suction muffler is provided on the side of the cylinder of the compression element. the tip,
In a compressor muffler inserted into a suction hole of an end plate that closes an opening of a cylinder, the suction muffler is formed by abutting a container body divided by a plane including the axis of a communicating pipe. A silencer for a compressor, characterized in that the communication pipe is press-fitted into the suction hole.