PURPOSE: To perform a displacement control while preventing working fluid from being heated, by both providing an oil pump in the shaft of a swash plate type compressor and operating this oil pump with its delivery pressure acting on the other end of a sleeve urging its one end by a spring and connecting with a tilt plate.
CONSTITUTION: If the pressure in a suction pressure chamber 45 decreases while a swash plate type compressor is in operation, a diaphragm 41 in a displacement control valve extends by action of a spring 46, and a valve unit 40 is detected from a valve seat 39. In this way, delivery oil of an oil pump 28, formed on a driving shaft 5, is allowed to flow into a pressure chamber 13 through a small hole 38, valve hole and an oil passage 32. The pressure chamber 13 is both arranged on the driving shaft and formed in a rotary part 8 by a flange 11a in one end side of a sleeve 11 connected with a tilt turning lever 18 of a swash plate 16, and the pressure chamber, if its pressure increases to a high level, decreases a tilt angle of the swash plate by moving the sleeve leftward.
JPH09105378 | VARIABLE DISPLACEMENT TYPE COMPRESSOR |
JP3412263 | REFRIGERATING CIRCUIT |
JP3282457 | SINGLE HEAD PISTON-TYPE COMPRESSOR |
TAKAGI MASASHI
MATSUOKA AKIO