Scroll compressor

Abstract

The present invention provides a scroll fluid machine, which comprises a stationary scroll fixed to a housing and an orbiting scroll that turns with a driving shaft. The stationary scroll comprises a stationary end plate having inner and outer stationary wraps and the orbiting scroll comprises an orbiting end plate having inner and outer orbiting wraps. Rotation of the orbiting scroll allows the inner and outer stationary wraps to engage with the inner and outer orbiting wraps respectively to form inner and outer volume-variable chambers. The two chambers have substantially the same compression ratio, so that substantially-equal low pressure gases are produced.

Description

technical field [0001] The present invention relates to a scroll type fluid machine capable of generating a large amount of gas at relatively low pressure. Background technique [0002] In a scroll fluid machine including a scroll compressor and a scroll decompressor, the volume of the sealed cavity gradually decreases from the beginning end of the scroll rotating on the outer periphery to the end end near the center, Thereby compressing the gas drawn from the periphery and expelling it near the center, or decompressing the gas drawn from the center and expelling it from the periphery. [0003] Such a known scroll type fluid machine is used at medium or high pressure to produce compressed gas at a relatively high pressure or to achieve effective decompression. [0004] However, in order to transfer powder such as flour, it is impossible in such a scroll type fluid machine to obtain a large amount of compressed gas at a low pressure of, for example, about 0.2 to 0.3 MPa. In...

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Problems solved by technology

However, the center of the orbiting scroll does not play the role of output, which is inefficient and uneconomical

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