Patent ID: 6739847
Filing Date: 2004-05-25
Classification: F04C,F16K,Y10T

Abstract:
A check valve with a silencing structure for one-way movement of a high pressure refrigerant from a low-pressure chamber to a high-pressure chamber comprising:a) a shielding seat having a vent hole with a curved lead angle, the vent hole located in the low-pressure chamber; b) a valve cock cover connected to the shielding seat and having a valve cock trepan boring and a press guide hole, the press guide hole located in the high-pressure chamber; c) at least one blast groove located between the shielding seat and the valve cock cover; and d) a valve cock in the valve cock trepan boring and movable between an open position and a closed position, whereby: i) in the open position the valve cock is moved into the valve cock trepan boring by the high-pressure refrigerant flowing into the low-pressure chamber, such that refrigerant flows from the low-pressure chamber through the vent hole and the at least one blast groove into the high pressure chamber; and ii) in the closed position, when the high-pressure refrigerant flow is stopped, the valve cock is moved out of the valve cock trepan boring to seal against the shielding seat by high-pressure refrigerant in the high-pressure chamber, such that high-pressure refrigerant is prevented from flowing into the low-pressure chamber from the high-pressure chamber.