Structure for sensing refrigerant flow rate in a compressor

摘要

A structure for sensing refrigerant flow rate in a compressor (10). The structure includes a passage forming member, a restriction hole (38), a differential pressure-type flow rate sensor (49), and a partition plate. The compressor (10) includes a housing connected to an external refrigerant circuit (42) via a refrigerant passage (50). The passage forming member is connected to an outer surface of the housing and forms a part of the refrigerant passage (50). The restriction hole (38) divides the refrigerant passage (50) into an upstream passage (39) and a downstream passage. The sensor (49) is provided in the passage forming member and picks up a pressure in the upstream passage (39) and a pressure in the downstream passage to sense flow rate of refrigerant in the refrigerant passage (50). The upstream passage (39) is formed in either the housing or the passage forming member. The structure further comprises a partition plate disposed between the housing and the passage forming member. The restriction hole (38) is formed in the partition plate to extend through the partition plate.