JPS635187A - Closed motor compressor - Google Patents

Abstract

PURPOSE:To reduce pressure pulsation due to motion of a suction lead to enable smooth motion of the suction lead, and to reduce noise, by arranging the first stage of a suction muffler having two muffler chambers, on the line of motion of a piston. CONSTITUTION:A suction muffler device 18 is divided in its inside by a partition plate 18 into two sections, that is, first and second muffler chambers 18b, 18a are defined therein. The first muffler 18a is communicated with a compressing chamber 21 formed therein with a suction lead, through a concave part passage hole 18 in the muffler chamber fitted in a coolant suction port 20a formed in the valve plate. In this arrangement, since the first muffler chamber 18b is arranged on the line of motion of a piston 23 in the compressor, pressure pulsation by the suction lead may be relaxed, thereby the motion of the suction lead may be made to be smooth and noise of the compressor may be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hermetic electric compressor used in refrigerators and the like, and particularly to a suction muffler device thereof.

BACKGROUND ART In recent years, there has been a demand for higher efficiency compressors for hermetic electric compressors (hereinafter referred to as compressors) from the standpoint of improving energy efficiency. Furthermore, in the suction muffler of a compressor, plastic materials with high heat insulation properties are being used for the purpose of improving the volumetric efficiency of the compressor.

An example of a conventional suction muffler device for a hermetic electric compressor will be described below with reference to the drawings.

FIG. 3 is a sectional view showing the structure of a conventional compressor, and FIG. 4 is a partial sectional view of a cylinder head portion of the conventional compressor.

In the figure, 1 is a closed container, 14 is an electric element, and 15 is a compression element. 9 is the motor rotor part, and the crankshaft 1
Rotate o. 7 is a casing, and a motor stator part 8
Then, the cylinder 5 is fixed.

6 is a piston of a compression element. 3 is the cylinder head,
4 is a valve plate. 2 is a suction muffler made of plastic material, 11 is a cylinder head 3.
This is a bolt that fixes the pulp plate 4.

In FIG. 4, 2a is a muffler refrigerant passage, 4a is a refrigerant suction port, 12 is a suction lead, 13 is a discharge lead, and 5a is a compression chamber.

In FIG. 4, the refrigerant passes through the suction muffler 2 and the muffler refrigerant passage 2a, and is led to the compression chamber 5a.

Problems to be Solved by the Invention However, in this method of sucking refrigerant from the suction muffler 2 through the entire muffler refrigerant passage 2a, there is an adiabatic effect. However, in the passage 2a in contact with the compression chamber 6a, there is no buffering effect on pressure pulsations caused by the movement of the suction reed 12.
As a result, the passage 2a prevented smooth movement of the suction reed, resulting in an increase in input to the compressor and an increase in noise.

The present invention solves these conventional problems and provides a suction muffler device that allows the suction lead to move in a circular motion, thereby increasing the efficiency and reducing noise of the compressor. .

Means for Solving the Problems In order to solve the above problems, the suction muffler device for a compressor of the present invention includes a first muffler chamber made of a heat insulating material such as plastic and partitioned by a partition plate having a refrigerant passage. and second
a muffler chamber, and a muffler chamber convex passage hole whose one end communicates with the first muffler chamber and whose other end communicates with a compression chamber constituting a compression element, and the first muffler chamber is located on the piston motion line. It consists of a structure that

According to the present invention, with the above-described configuration, pressure pulsations caused by the movement of the suction reed can be alleviated by the first muffler chamber located on the piston movement line, and as a result, the suction reed moves smoothly, It is possible to increase the efficiency of the compressor and reduce the noise of the kiln.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. Since everything other than the suction muffler device is the same as the conventional example, detailed explanation will be omitted.

FIG. 1 is a sectional view of the compressor of the present invention, and FIG. 2 is a partial sectional view of the cylinder head.

In Fig. 1, 16 is an electric element, 1 is a compression element, 2 is
2. is a closed container, 19 is a pulp plate, and 20 is a cylinder head. Reference numeral 18 denotes a suction 77 device of the present invention, which is divided into upper and lower halves by a partition plate 18e, and has a second muffler chamber 18.
a, a first muffler chamber 18b is formed.

In FIG. 2, the refrigerant gas sucked into the suction muffler device 18 leaks to the second muffler chamber 18a formed in the suction muffler device 18, and the refrigerant gas leaks to the cylinder head 20 and the partition plate 18e. , a muffler chamber convex passage hole 1s that engages with a refrigerant suction port 20a provided in the pulp plate 19
d is introduced into the compression amount 21. Further, the length of the muffler chamber convex passage hole 18d can be made equal to or less than the fitting dimension by locating the first muffler chamber 18b on the piston/motion line.

Effects of the Invention As described above, according to the suction muffler device of the present invention, the following effects can be obtained.

(1) By locating the first muffler chamber on the piston motion line, the muffler chamber convex passage hole connecting the compression chamber and the first muffler chamber becomes shorter. Therefore, pressure pulsations caused by the movement of the suction reed are alleviated by the first muffler chamber, allowing smooth movement of the suction reed, making it possible to improve the efficiency of the compressor and reduce noise. Taking a 200W class compressor as an example,
Compared to the conventional model, input 3% reduction, 600) (z noise 2
dB reduction is now possible.

<2) Since the suction muffler is made of plastic material, the insulation effect of the suction refrigerant gas increases, improving volumetric efficiency.

[Brief explanation of the drawing]

3 is a sectional view of a conventional compressor, and FIG. 4 is a sectional view of a suction muffler device of a conventional compressor. 16... Electric element, 17... Compression element, 18... Suction 77 device, 1B &...
・Second muffler room, 18c... Refrigerant passage, 1st b
...First muffler room, 18e...Partition plate, 18d...Muffler room convex passage hole, 21...
...Compression chamber, 2201660. Airtight container, 23...
piston. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] The suction muffler device consists of a sealed container, an electric element housed in the sealed container, a compression element, and a suction muffler device made of a heat insulating material such as plastic. The first muffler chamber has a first muffler chamber and a second muffler chamber, and a muffler chamber convex passage hole whose one end communicates with the first muffler chamber and whose other end communicates with the compression chamber constituting the compression element, and the first muffler chamber is a hermetic electric compressor located on the line of piston motion.