JPH03175190A - Rotary compressor - Google Patents

Abstract

PURPOSE:To obtain a rotary compressor having little noise even at starting by buryingly providing a permanent magnet in the proximity of the extreme end of a vane to be hard to separate the extreme end of the vane from a roller piston. CONSTITUTION:A permanent magnet 13 is buried in the proximity of the extreme end of a vane 8. By this constitution, due to effect of the magnetic force of the permanent magnet 13 and the pressure of a spring 11, the vane 8 can be hard to separate from a roller piston 6 even at starting. Consequently, a rotary compressor having little noise even at starting can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to rotary compressors for refrigerators, vending machines, etc.

BACKGROUND OF THE INVENTION In recent years, rotary compressors are required not only to improve efficiency but also to reduce noise.

The configuration of the conventional example will be explained below with reference to FIGS. 2 and 3.

2 and 3 show a rotary compressor shown in Japanese Patent Application Laid-Open No. 64-807883. In FIG. , and a compression device driven by a motor. In the compression device, a roller piston 6 fitted to an eccentric portion 6 of a shaft 4 rotates within a cylinder 7 due to rotation of the shaft eccentric portion 6, and the inside of the cylinder is partitioned by vanes 8 that are pressed against the roller piston 6. As a result, the gas inhaled through the suction pipe 9 is released from the inside of the closed container 1, and then is discharged from the discharge pipe 10.

In FIG. 3, the page 78 is pressed against the roller piston 6 by the spring 11 and gas back pressure 12.

Problems to be Solved by the Invention However, with the above configuration, the vane is pressed against the roller piston only by the pressure of the spring because no gas back pressure is applied to the vane at the time of startup. However, there were problems such as the problem of easy operation and generation of noise.

Means for Solving the Problem In order to solve this problem, the present invention has a configuration in which a permanent magnet is buried near the vane tip.

Function The present invention has a structure with an earthen floor, so that a magnetic force acts between the roller piston and the vane tip, making it difficult for the vane tip to separate from the roller piston even during startup.

EXAMPLE Hereinafter, a rotary compressor according to an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

In Figure 1, 8 is a vane, and a permanent magnet 1 is placed near the tip.
3 are buried.

In the above configuration, due to the effect of the magnetic force of the permanent magnet 13 and the suppressing effect of the spring 11, the vane 8
can be made more difficult to separate than the roller piston 6.

Therefore, it is possible to provide a rotary compressor with low noise even during startup.

As described above, the present invention provides a rotary compressor that generates less noise even when starting up, since the vane tips are difficult to separate from the roller piston by embedding permanent magnets near the vane tips. can do.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the rotary compressor of the present invention. 1...Airtight container, 2...Stator, 3.
...Rotor, 4...Shaft, 6...
...Roller piston, 7...Cylinder, 8.
...Vane, 13...Permanent magnet.

Claims (1)

[Claims] A motor having a stator and a rotor is housed in a sealed container, a shaft rotated by the motor, a cylinder forming a compression chamber, a roller piston inscribed in the compression chamber and rotating eccentrically, and a roller piston whose tip is a roller. 1. A rotary compressor comprising a compression device comprising a vane that is in pressure contact with a piston and partitions the compression chamber into high and low pressure sides, and a permanent magnet is embedded near the tip of the vane.