JPH01371A - Hermetic electric compressor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a method in which refrigerant gas is ignited through a suction pipe through a suction muffler.
This relates to a hermetic electric compressor with a structure that leads directly to a cylinder.

Conventional technology In recent years, there has been a demand for hermetic electric compressors (hereinafter referred to as compressors) with high energy efficiency, and it is already known that synthetic resin is generally suitable for the suction muffler in the direct suction 7 system. It is being

An example of the conventional compression source mentioned above will be described below with reference to the drawings. FIGS. 2 and 3 show a conventional compressor.

In FIG. 2, 1 is a closed case of the compressor. Reference numeral 2 denotes an electric element, which is composed of a stator 3, a rotor, and a crankshaft (not shown below) directly fixed to the rotor. A compression element 4 is composed of a cylinder head 6, a cylinder, a piston, and a connecting rod (not shown below) connected to the eccentric portion of the crankshaft.

This compression element 4 is elastically supported within the closed case 1 by a spring 6.

Reference numeral 7 designates a suction gas introduction path, which includes a suction pipe 8 fixed to the sealed case 1 and rising upward from inside, a close coil spring 9 whose lower end is press-fitted into the suction pipe 8, and an upper end of the close coil spring 9. Insertion tube 10. It is composed of a suction muffler 11 into which the insertion tube 1o is inserted, and a communication portion 12.

FIG. 3 shows a side sectional view of the muffler 11, and the communication portion 12 is connected to the suction hole 1 of the cylinder head 5.
Connect 3. The suction hole 13 is connected to the pulp plate 14.
It is made to face the suction port 16 of.

16 is a discharge chamber, 17 is a suction valve reed for opening and closing the suction port 16 provided in the pulp plate 14, 18 is a cylinder, and 19 is a piston inserted into the cylinder 18.

The operation of the conventional compressor configured as described above will be described below. When the electric element 2 is activated, the piston 19 reciprocates within the cylinder 18 to suck in, compress, and discharge refrigerant gas.

At this time, the suction gas is sucked into the cylinder 18 after passing through the suction pipe 8, the tight coil spring 9, the insertion pipe 10, the suction muffler 11, and the communication part 12. Electric element 2 and compression element 4
isolated from the heat generated by the

Therefore, the suction gas is sucked into the cylinder 18 without being exposed to the high temperature atmosphere.

Problems to be Solved by the Invention However, with the above configuration, although it is possible to increase calories due to the heat insulating effect, there is almost no effect of buffering pressure vibrations caused by the movement of the suction lead 17. This hinders smooth movement, and as a result, efficiency cannot be sufficiently improved, and vibrations and noise are increased.

In view of the above drawbacks, the present invention provides a compressor with high efficiency, low noise production, and low vibration by fully utilizing the characteristics of a direct-coupled suction muffler.

Means for Solving the Problems In order to solve the above problems, the compressor of the present invention provides a low pressure chamber near the compression chamber of the cylinder, and communicates the low pressure chamber with the suction muffler near the suction port of the pulp plate. They are communicated through holes.

Effects According to the present invention, the pressure pulsations caused by the movement of the suction lead are buffered by the low pressure chamber provided immediately in front of the suction lead, allowing smooth movement of the suction lead.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

In the drawings, components given the same numbers as those in the conventional example have the same configurations as those in the conventional example, so detailed explanations will be omitted.

The cylinder 18 forms a recess 18a that is open toward the pulp plate 14, and forms a low-pressure chamber together with the pulp plate 14. The low pressure chamber 18a is communicated with the communication hole 20 between the suction hole 13 of the cylinder head 6 and the communication portion 12 of the suction 77. It is desirable that the volume of the low pressure chamber 18a is at least 0.5 times the cylinder volume.

Further, the suction hole 13 of the cylinder head 6 is arranged to face the suction port 15 of the pulp plate 14.

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

The return refrigerant is supplied through a suction pipe 8, a coil spring 9, a contact pipe, a reading pipe 10,
O is sucked into the cylinder 18 through the suction muffler 11 and the communication part 12 and through the low pressure chamber 18 &.By providing the low pressure chamber 18a near the suction port 16 of the pulp plate 14, pressure pulsations caused by the suction lead 17 are buffered. This allows the suction lead 17 to move smoothly.

Furthermore, since pressure pulsations are alleviated, pressure pulsations within the muffler and in the piping section in front of the muffler are reduced.

As described above, according to this embodiment, the suction muffler 11 and the suction hole 13 of the cylinder head 6 are communicated with each other, the suction hole 13 of the cylinder 6 is made to face the suction port 16 of the pulp plate 14, and the suction hole 13 of the cylinder head 6 is made to face the suction port 16 of the pulp plate 14. A concave-shaped low pressure chamber 18a is provided, and the low pressure chamber 1 is connected to the low pressure chamber 18a through the communication hole 20.
By communicating the suction muffler 8a with the suction muffler, it is possible to reduce noise and vibration caused by pressure pulsations and improve efficiency.

Effects of the Invention As described above, the present invention provides a low pressure chamber near the compression chamber of the cylinder, and communicates the cooling muffler with the low pressure chamber through a communication hole provided near the suction port of the pulp plate, thereby eliminating pressure pulsations. It is possible to reduce noise and vibration and improve efficiency.

[Brief explanation of drawings]

Fig. 1 is an enlarged sectional view of the main parts of a hermetic compressor according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts of a conventional hermetic electric compressor, and Fig. 3 is an enlarged sectional view of the main parts of a conventional hermetic compressor. FIG. 1... Sealed case, 2... Electric element,
4... Compression element, 6... Cylinder head, 11... Suction muffler, 12... Communication portion, 13... Suction hole, 14...Pulp plate, 15...Suction port, 18...
・Cylinder, 18a...Low pressure chamber, 2o...
・Conduction hole. Name of agent: Patent attorney Toshio Nakao and one other person II
-°-Balding muff 14- Pallab head 15''-Balting port 18-Cylinder excitation...-Low pressure chamber 20-Conducting hole Fig. 1 Fig. 2 Fig. 3

Claims (1)

[Claims] An electric element and a compression element in a sealed case, a cylinder forming a compression chamber, a pulp plate closing the cylinder, and a suction muffler intermittently communicating with the inside of the cylinder via a suction port provided in the pulp plate. A closed electric motor, characterized in that a low pressure chamber is provided near the compression chamber of the cylinder, and the suction muffler and the low pressure chamber are communicated through a communication hole provided near the suction port of the pulp plate. compressor.