Rotary compressor

Abstract

A rotary compressor includes a cylinder 30, an eccentric portion 31a of a shaft 31 disposed in the cylinder 30, and a piston 32 which is fitted into the eccentric portion 31a. A columnar groove 32a is formed in the piston 32, and angle of an arc of the groove 32a is greater than 180°. The rotary compressor further includes a piston 32 inserted into a slot formed in the cylinder 30, a slot 30b formed in the cylinder 30, and the groove 32a formed in the piston 32, and a columnar portion 33a having a columnar portion 33a on its one end. A compression chamber 39 is formed between the cylinder 30 and the piston 32, the columnar portion 33a is swingably fitted into the groove 32a, and the vane 33 reciprocates in the slot 30b as the shaft 31 rotates. The compression chamber 39 is divided into a high pressure-side space 39b and a low pressure-side space 39a by the vane 33. The groove 32a formed in the piston 32 is formed into a columnar shape, the groove 32a has the arc and an angle of the arc is greater than 180°. A fictitious extension La of the arc is located inside of the outer periphery fictitious line Lb of the piston 32. Gas and oil are less prone to leak from the high pressure-side space 39b to the low pressure-side space 39a of the compression chamber 39.

Description

Technical field [0001] The present invention relates to a rotary compressor provided with a blade having a cylindrical portion inserted into an opening formed in a cylinder, whereby a compression chamber is partitioned into a high-pressure side space and a low-pressure side space by the blades. Background technique [0002] At present, in refrigeration equipment or air-conditioning equipment, the following compressor is used, that is, the gas refrigerant evaporated by the suction evaporator is compressed to the necessary pressure in order to condense the sucked gas refrigerant, and the high temperature is sent to the refrigerant circuit High-pressure gas refrigerant. As one of such compressors, a rotary piston type rotary compressor (hereinafter referred to as a rotary compressor) is known. [0003] Picture 10 This is a partial longitudinal sectional view showing an example of a conventional rotary compressor. In addition, Picture 11 for Picture 10 A cross-sectional view along p...

AI Technical Summary

Problems solved by technology

[0016] However, Figure 12 In the swing piston type rotary compressor shown, a gap must be provided in the swing part of the piston 132 and the vane 133. Therefore, compared with the above-mentioned rotary compressor, gas or lubricating oil can easily flow from the high-pressure side of the compression chamber through the gap in the swing part. Space leakage into low pressure side space

As a result, in the conventional oscillating piston type rotary compressor, there is a problem that the compression loss increases and the efficiency of the compressor decreases.

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