SCROLL-TYPE COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a scroll-type compressor capable of reducing noises in a specific frequency range generated when using a mixed refrigerant.SOLUTION: The scroll-type compressor comprises: a revolving scroll 30 rotatably coupled with an eccentric pin of a main shaft; and a stationary scroll 20 forming a compression chamber opposed to the revolving scroll 30 to compress a refrigerant, and having an emission port 23 emitting the compressed refrigerant to a high-pressure chamber on an end plate. The emission port 23 comprises: an upstream port part 23A communicated with the compression chamber and having an opening area A1; and a downstream port part 23B communicated with the upstream port part 23A having an opening area A2 larger than the opening area A1 of the upstream port part 23A. A node of a vibration mode is generated at a boundary between the upstream port part 23A and the downstream port part 23B.