A refrigerant compressor with mechanism for adjusting the capacity of the compressor.

摘要

A reciprocating piston type refrigerant compressor (1) is disclosed which includes a compressor housing (10) having a cylinder block (101) provided with a plurality of cylinders (23) and a crank chamber (13) adjacent the cylinder block (101). A piston (21) slides within each cylinder (23) and is reciprocated by a wobble plate (17) driven by a cam rotor (14). A drive shaft (12) is connected to the cam rotor (14) to drive the cam rotor. A front end plate (11) is disposed on an opening of the crank chamber (13); the front end plate (11) rotatably supports the drive shaft (12). A rear end plate (25) is fixed on the opposite end of the compressor housing (10) together with a valve plate (24) which includes a suction chamber (35) and a discharge chamber (36). The rear end plate (25) is provided with a plurality of dead space chambers (42), each of which is connected with one of the cylinders (23) through a hole (44) formed through the valve plate (24). A valve (45) is slidably disposed within the dead space chamber (42) to control the opening and closing of the hole (44) in the valve plate (24). The valve (45) is controlled by a valve control device (51, 53, 54, 55) supported by the rear end plate (25). The valve control device is responsive to the environment to adjust the capacity of the compressor (1) by controlling the operation of the valves (45).