Birch, Stewart, Kolasch & Birch, LLP
Horizontal step scroll compressor with bypass ports
Provided is a horizontal step scroll compressor with which liquid compression can be effectively prevented even when starting up from a liquid migration state in which liquid refrigerant has migrated into the compressor while operation of the compressor is stopped. In this horizontal step scroll compressor, bypass ports, which divert pressure into a discharge chamber when the pressure in a pair of compression chambers reaches or exceeds a set pressure at an intermediate compression position between a suction cutoff position and the position communicating with a discharge port, are provided along the spiral direction of spiral wraps. Among these bypass ports, the opening area of the bypass ports that open into the first compression chamber, which includes the step parts in the gravity direction when a step part and a step part, and a step part and a step part, begin to engage each other, is greater than the opening area of the bypass port, which opens to the second compression chamber forming a pair with the first compression chamber.
MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
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Takahide Hisao Toshiyuki Hajime
Ito Mizuno Goto Sato