Variable suction device for an A/C compressor to improve nvh by varying the suction inlet flow area

摘要

A variable displacement compressor for an air conditioning system includes a suction throttle valve. The suction throttle valve includes a housing with a cavity formed therein. A first piston reciprocatingly disposed in the cavity is configured to cause a variable restriction of a flow of refrigerant through a suction inlet formed in the housing. The suction inlet provides fluid communication between a suction port and the cavity formed in the housing. The refrigerant flows through the suction port in a direction that is not parallel to a direction the piston reciprocates within the cavity. The suction throttle valve is configured to increase the restriction in the suction inlet when a crankcase pressure associated with the variable displacement compression is increased relative to an external suction pressure of the refrigerant entering the suction throttle valve.

主权项

1. A suction throttle valve for a variable displacement compressor having a compressor housing including a crankcase chamber and a suction chamber formed therein, the suction throttle valve comprising:
a valve housing with a cavity formed therein, the valve housing including a suction inlet formed therein; a suction port extending laterally from the valve housing, wherein the suction inlet provides fluid communication between the suction port and the cavity formed in the valve housing; a first piston reciprocatingly disposed in the cavity, wherein the first piston is configured to cause a variable restriction of the suction inlet as the first piston reciprocates within the cavity of the valve housing; and a partition dividing the cavity into a first chamber and a second chamber and dividing the suction inlet into a first suction inlet and a second suction inlet, wherein a first fluid flowing through the suction port flows in a direction that is not parallel to a direction the first piston reciprocates in the cavity of the valve housing.