Scroll compressor

Abstract

Subject of the present invention is to provide a vortex compressor, which can inhibit by setting the overflow valve pressure of valve gear body pressure into the cause of fixed vortex plate deformation, and the inhibition caused by collision of retainer and valve pressure deformation of the body or a collision. Fixed vortex dish with overflow valve device, the pressure of compression chamber rises above to set pressure, open flow so that the compression chamber and pressure chamber connected from the overflow valve device is connected the overflow of the compression chamber and jet pressure chamber flow, overflow valve open and close the overflow flow, configuration between the relief valve and the retainer and the elasticity of the overflow valve is given according to the pressure of the valve pressure, limiting valve pressure of the moving range of retainer, the overflow valve closed state of the overflow mouth and open the overflow state of flow in any conditions, all press pressure the valve pressure by elastic body pressure against the retaining ring.

Description

Technical field [0001] The present invention relates to a scroll compressor used in refrigeration and air conditioning equipment and the like. Background technique [0002] Scroll compressors used in indoor air conditioners and the like are used under a wide range of operating conditions, so it is inevitable to operate in a state of overcompression of refrigerant gas or liquid compression of refrigerant and refrigerating machine oil. Therefore, a scroll compressor with a structure that can withstand the above-mentioned situation is required. [0003] Patent Document 1 discloses a conventional scroll compressor that prevents overcompression or liquid compression. Hereinafter, the scroll compressor of Patent Document 1 will be described. A discharge pressure chamber is formed in a closed container having a suction port and a discharge port. The electric motor and the compression mechanism are housed in the discharge pressure chamber. In the compression mechanism, a fixed scroll h...

AI Technical Summary

Problems solved by technology

[0013] In the relief valve device of the scroll compressor disclosed in Patent Document 1, since the bush is press-fitted into the bush press-fitting portion, compressive stress is generated on the fixed scroll, and deformation of the fixed scroll toward the wrap side occurs. , has issues with reliability and performance

In addition, the pressing force of the spring varies due to variations in the depth accuracy of the bushing press-fitting part, and variations in the positional accuracy of the bushing press-fitting.

Therefore, the pressure at which the relief valve opens has a large deviation, and it is difficult to obtain a stable relief valve function in batch production

[0014] In the relief valve device of the scroll compressor disclosed in Patent Document 2, since the valve pressing body is free when the relief valve closes the relief flow path, vertical movement of the valve pressing body at the guide portion is likely to occur.

As a result, there is a collision sound between the retainer and the valve pressing body, and there is also a problem that the retainer or the valve pressing body is deformed due to the collision, resulting in insufficient strength and reduced reliability.

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