| 摘要 |
WOBBLE PLATE TYPE COMPRESSOR WITH VARIABLE DISPLACEMENT MECHANISM A refrigerant compressor including a compressor housing having a cylinder block is disclosed. A plurality of cylinders are formed around the periphery of the cylinder block and a piston slidably fitted within each of the cylinders. The pistons are reciprocated by a drive mechanism. A crank chamber is formed between the cylinder block and a front end plate of the compressor housing. A drive mechanism includes a drive shaft, a rotor disposed on said drive shaft, a slant plate with an adjustable slant angle disposed adjacent the rotor, and a wobble plate disposed adjacent the slant plate. Rotation of the drive shaft causes rotation of the rotor and the slant plate,resulting in nutational motion of the wobble plate to reciprocate the pistons within their cylinders. The slant angle of the slant plate changes in response to a change of pressure in the crank chamber to change the capacity of the compressor. The compressor housing includes a rear end plate with suction and discharge chambers. A passageway links the suction chamber and the crank chamber and is controlled by a control mechanism. The control mechanism includes a first control valve element which controls the opening and closing of one end of the passageway responsive to the pressure in the suction chamber and a second valve control element which controls the opening and closing of the other end of the passageway in response to a pressure difference between the suction and discharge chambers. The second valve control element opens the passageway, linking the first control valve element to the suction chamber when the difference in pressure between the discharge chamber and the suction chamber becomes greater than a predetermined value. In a second embodiment, the first valve control element is responsive to a change in pressure in the crank chamber.
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