Variable displacement scroll compressor

Abstract

A stationary base plate includes a sub-bypass hole, which communicates between a suction chamber and a first compression chamber, and a main bypass hole, which communicates between the suction chamber and a second compression chamber. A rotational center of the orbiting scroll and the sub-bypass hole are located along a first imaginary line. The rotational center of the orbiting scroll is also located along a second imaginary line, which is perpendicular to the first imaginary line. The main bypass hole opens at a location of the stationary base plate, which is on a side of the second imaginary line where the sub-bypass hole is located, so that timing of communicating between the suction chamber and the first compression chamber with each other is deviated from timing of communicating between the suction chamber and the second compression chamber with each other.

Description

technical field

[0001] The invention relates to a variable displacement scroll compressor. Background technique

[0002] For the scroll compressor known in the prior art, the fixed scroll and the movable scroll are in contact with each other, and the refrigerant flows in the two closed spaces (compression chambers) respectively defined by the above fixed scroll and movable scroll. ) are compressed. In this scroll compressor, the movable scroll rotates a plurality of times (for example, twice) relative to the fixed scroll so that refrigerant sucked into each compression chamber is compressed. The compression of the refrigerant in the scroll compressor is more moderate compared to the piston compressor, so the leakage of refrigerant from each compression chamber is less in the scroll compressor.

[0003] One known such scroll compressor is a variable displacement scroll compressor (for example, see JPS59-028083A, corresponding to US4505651A). In known variable displacement ...

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