Patent ID: 11913698

Abstract:
A self-pressure-relief air distribution mechanism includes an air distribution valve (6) where a rear face of the air distribution valve (6) is divided into a high-pressure face (66) and a low-pressure face (65), each hermetically separated by a third sealing ring (b3) that seals the air distribution valve (6) and a cover (2). A low-pressure passage (22) of the cover (2) can communicate with the rear face of the air distribution valve (6) via a pressure-relief hole (61), to guide a low-pressure airflow in the cover (2) to the rear face of the air distribution valve (6). A cryogenic refrigerator includes the self-pressure-relief air distribution mechanism. With the provision of the pressure-relief hole (61) and the third sealing ring (b3), the self-pressure-relief air distribution mechanism has a reduced pressure receiving area, thereby reducing a positive acting force and reducing wear.