Patent ID: 6783332
Filing Date: 2004-08-31
Classification: F04B,Y10T

Abstract:
A controlled valve for controlling the displacement of a variable displacement compressor that is incorporated in a refrigerator circuit, wherein the compressor includes a control pressure chamber, and the displacement of the compressor varies in accordance with the pressure in the control pressure chamber, the control valve comprising:a first valve body for varying a valve opening to adjust the pressure in the control pressure chamber; a pressure sensing member, which is displaced in accordance with the pressure in the refrigerant circuit to move the first valve body such that the displacement of the compressor is controlled to cancel the fluctuation of the pressure in the refrigerant circuit; an actuator for urging the pressure sensing member by a force that corresponds to an external command to determine a target value of the pressure in the refrigerant circuit; and a second valve body, which is operably coupled to the pressure sensing member, wherein the second valve body adjusts the opening degree of a refrigerant passage, which forms a part of the refrigerant circuit, in accordance with the displacement of the pressure sensing member.