The invention provides a compressor that can reduce occurrence of vibration and noise due to self-induced vibration of an suction valve at the time of a low flow rate surely with an inexpensive structure. In the compressor according to the invention, an opening regulating valve 40 provided in a refrigerant suction channel 13 c to a cylinder 11 a is formed by an elastically deformable spiral member 41 , and intervals of spiral portions 41 a of the spiral member 41 are changed according to a flow rate of a refrigerant, whereby an opening of the channel 13 c is regulated. Thus, it is possible to reduce occurrence of vibration and noise due to self-induced vibration of an suction valve 14 c at the time of a low flow rate surely, and it is possible to simplify a structure of the opening regulating valve 40.
1. A compressor that includes a cylinder, the cylinder comprising:
a refrigerant inlet and a refrigerant outlet at one end,
a cylinder head comprising a refrigerant suction chamber in fluid communication with a refrigerant inlet and a refrigerant discharge chamber in fluid communication with a refrigerant outlet,
a piston reciprocating in the cylinder,
an suction valve provided in the refrigerant inlet,
a discharge valve provided in the refrigerant outlet; and
an opening regulating valve positioned in a refrigerant channel and selectively in fluid communication with one of the refrigerant suction chamber or the refrigerant discharge chamber, the opening regulating valve comprising:
an elastically deformable spiral member; and
a blocking member configured to block an end side of the spiral member,
wherein diameters of the spiral member are formed uniformly from the end side to an opposite end side, and wherein the blocking member comprises a tubular member and an opening formed therethrough in the center of the blocking member, configured to allow a refrigerant to flow, and is configured to regulate an opening of the channel by changing intervals among spiral portions of the spiral member according to a flow rate of the refrigerant.