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US 2010/0074784 A1Published application
Scroll compressor
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsYoshiyuki Kimata, Yoshiaki Miyamoto, Hajime Sato, Taichi Tateishi
Life of this patent
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Abstract
A scroll compressor (CP) in which the cylinder oil circulation rate of lubricant is optimized during the operation to improve the compression efficiency is provided. In the scroll compressor (CP) having a stepped shape, the cylinder oil circulation rate of lubricant taken into the scroll compressor (CP) and circulated together with refrigerant is set to fall within the range from 1% or more to 10% or less.
Claims3
A scroll compressor comprising:
- a fixed scroll which has a spiral wall formed upright on one side face of an end plate;
- and an orbiting scroll which has a spiral wall formed upright on one side face of an end plate and which is supported, when the walls are engaged, so as to allow orbital revolving motion thereof while preventing rotation thereof, the one side face of the end plate of at least one of the fixed scroll and the orbiting scroll being provided with a step part formed to be higher at a center portion and lower at an outer end along a spiral of the wall, an upper edge of the wall of the other one of the fixed scroll and the orbiting scroll being divided into a plurality of portions whose height is low at a center portion of a spiral and is high at an outer end of the spiral, to form a stepped shape corresponding to the step part provided on the end plate,
- wherein a cylinder oil circulation rate of lubricant taken into the scroll compressor and circulated together with refrigerant is set to fall within the range from 1% or more to 10% or less.
Dependencies are inferred from the claim text.