JPH03258981A - Sealed type electric compressor - Google Patents

Abstract

PURPOSE:To improve working property and reduce the stress of an inlet muffler by fixing the communicating pipe of a synthetic resin inlet muffler and an oil capillary through a steel band having spring property. CONSTITUTION:A coolant gas is introduced into a synthetic resin inlet muffler 8 through an inlet pipe 5, a spring 7, and an inserting pipe 6, passed through a communicating pipe 8a and sucked into a cylinder 4 from an inlet hole 3b. After the inlet muffler 8 is inserted o an inserting hole above a cylinder head, an oil capillary 11 is inserted to a through hole 8b, and the inlet muffler 8 and the oil capillary 11 are simultaneously fixed through a steel band 12 having spring property by two fixing bolts 13. The steel band 12 having property serves as a valve seat. Hence, working property can be improved, and the stress of the inlet muffler can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic electric compressor used in refrigerators, air conditioners, etc.

Conventional technology In recent years, closed-type dynamic compressors (hereinafter referred to as compressors) are required to be highly energy efficient, and it is already known that synthetic resin suction mufflers are generally suitable for direct suction systems. ing.

An example of the above-mentioned conventional compression (Japanese Unexamined Patent Publication No. 160570/1982) will be described below with reference to the drawings.

4 and 6 show the conventional pressure is'e. 6
0 is an airtight container, 51 is a compression element elastically supported within the airtight container 60, and 52 is an electric element disposed above the compression element 61. Reference numeral 63 denotes a suction muffler, 64 a cylinder head, 56 a communication pipe having a stringed-out part, and 66 a spring washer.The suction muffler 63 is fixed by press-fitting the communication pipe 66 into the cylinder head 64 via the spring washer 66. ing. 67 is an insertion tube inserted into the suction muffler 63. 58 is a pulp plate, 59 is a suction hole provided in the pulp plate 68, and 60 is a cylinder. 61 is a lubricating oil, and 62 is an oil capillary that supplies the lubricating oil 61 to the circular portion of the cylinder head 64, which is press-fitted into the cylinder head 54.

The operation of the compressor configured as above will be explained below.

First, refrigerant gas is sucked into the compression element 51 driven by the electric element 62 from an external cooling path (not shown) through the insertion pipe 67 and into the suction muffler 53179. This refrigerant gas is led into the p-cylinder head 54 through the communication pipe 65 and then into the cylinder 60 through the suction hole 59.

Problems to be Solved by the Invention However, in a configuration such as an upper rudder, an oil capillary 62. The communication pipes 56yk are press-fitted individually, resulting in poor workability, and the communication pipe 66 press-fitted into the cylinder head 64 is structurally made of metal, so heat transfer is good. Gas,
It is heated and expanded by the high-temperature cylinder head 64, making it difficult to improve volumetric efficiency.

In addition, when the communication pipe 66 is made of synthetic resin, the heat transfer is
Since the refrigerant gas sucked in through the communication pipe 66 is not heated at all, the volumetric efficiency is improved, but in general, the refrigerant and S resins are weak against stress, so installation becomes complicated. Was.

In view of the above-mentioned problems, the present invention provides a compressor that improves workability, reduces the stress during installation when the communicating pipe is made of synthetic black fat, and is securely fixed.

Means for Solving the Problems In order to solve the above-mentioned problems, the compressor of the present invention has a cylinder head provided with an insertion hole in a compression element constituting the compressor, and a cylinder head inserted so as to communicate with the insertion hole. A suction muffler is constructed by compressing a synthetic resin suction muffler having a communicating pipe, an oil capillary whose one end is immersed in the lubricating oil reservoir housing and whose other end is open to the synthetic resin suction muffler circle, and a fixing seat. The steel strip has a washer portion that fixes the communication pipe and the oil capillary, and a spring portion that presses the oil capillary.

According to the above-described structure, the present invention inserts the synthetic resin suction muffler into the insertion hole of the cylinder head, then attaches the oil capillary to the synthetic resin suction muffler, and connects the synthetic resin suction muffler and the oil capillary to the spring part. Since it can be fixed through the steel strip that has the muffler, work efficiency is improved, and since the steel strip that has spring properties acts as a washer, there is less stress on the synthetic resin suction muffler, and the reliability of the synthetic resin can be improved. .

EXAMPLE A compressor according to an example of the present invention will be described below with reference to the drawings. Fig. 1 is an exploded perspective view of the main parts of a compressor according to an embodiment of the present invention, Fig. 2 is a front view of the main parts of Fig. 1, and Fig. 3 is a sectional view of the main parts taken along line A-A in Fig. 1. It is a diagram.

In the figure, 1 is an electric element, 2 is a compression element, 3 is a cylinder head constituting the compression element 2, and 3a is an insertion hole 3.
b is a suction hole, 4 is a cylinder, 6 is a suction pipe, 6 is an insertion pipe,
Reference numeral 7 denotes an insertion tube 6f: an elastically supporting spring, and 8 an absorption muffler made of resin, into which the insertion tube 6 is inserted. 8a is a communication pipe integrally molded with the synthetic resin suction muffler 8, 8b is a through hole, and 8C is a fixing seat formed on the communication pipe 8a.

9 is a screw hole for fixing the synthetic resin suction muffler provided in the cylinder head 3; 10 is a lubricating oil; 11 is an oil capillary with one end immersed in the lubricating oil 10; 12 is a steel strip having spring properties; 12a is a spring portion that presses the oil capillary 11, 12b is a washer portion, and 13 is a fixing bolt. The synthetic resin suction muffler 8 is inserted into the insertion hole 31 above the cylinder head 3! After inserting the oil capillary 11 into the through hole 8b, the other end of the oil capillary 11 is inserted into the through hole 8b, and the synthetic resin suction muffler 8 and the oil capillary 11
At the same time, it is fixed to the fixing screw hole 9 with the fixing bolt 13 via the steel strip 12 having spring properties.

In the above configuration, the refrigerant gas taken from the cooling device (not shown) passes through the suction pipe 5, the spring 7, and the insertion pipe 6, is guided to the synthetic resin suction muffler 8, and is suctioned through the communication pipe 8a. It is sucked into the cylinder 4 through the hole 3b. After inserting the synthetic resin suction muffler 8 into the insertion hole 3a above the cylinder head 3, insert the oil capillary 11 into the through hole 8b, and connect the synthetic resin suction muffler 8 and oil capillary 11 with a steel strip 12 having spring properties. Since the two fixing ports 13 can be used to fix the muffler 8 at the same time, workability is improved, and since the steel strip 12 with spring properties acts as a washer, less stress is applied to the synthetic resin suction muffler 8, and the synthetic resin Reliability can be improved.

Effects of the Invention As described above, the compressor of the present invention improves workability because the communication pipe of the synthetic resin suction muffler and the oil capillary can be fixed via a steel strip having spring properties. Since the band acts as a washer, it can be fixed to the synthetic resin suction muffler without applying stress to the housing, and since the fixing seat provided on the communication pipe is pressed by the washer,
This prevents looseness in the circumferential direction of the communication pipe, and therefore allows the communication pipe to be molded from synthetic resin, suppressing thermal heat and expansion of the refrigerant gas, improving volumetric efficiency, and improving performance as a compressor.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main parts of a pressure cat press machine according to an embodiment of the present invention, Fig. 2 is a front view of the main parts of Fig. 1, and Fig. 3 is a diagram taken along line A-A in Fig. 1. FIG. 4 is a front view of essential parts of a conventional compressor, and FIG. 6 is a sectional view of essential parts taken along line BB in FIG. 4. 1... Electric element, 2... Compression element, 3
...Cylinder head, 3a...Insertion hole, 8...Synthetic resin suction muffler, 8a...
...Communication pipe, 8C...Fixing seat, 10...
... Lubricating oil, 11 ... Oil capillary,
12... Steel strip, 12 &... Spring part, 1
2b...Washer part.

Claims (1)

[Claims] a cylinder head in which an elastically supported compression element and an electric element are arranged in a closed container, and an insertion hole is provided in the compression element;
A synthetic resin suction muffler having a communication pipe inserted into the insertion hole, a fixing seat provided on the communication pipe, one end opening into a lubricating oil reservoir, and the other end opening into the synthetic resin suction muffler. A steel strip having an open oil capillary, a washer portion that presses the fixing seat to fix the communication pipe of the suction muffler and the oil capillary, and a spring portion that presses the oil capillary. Features: Hermetic electric compressor.