PRESSURE CONTROL VALVE AND SCROLL COMPRESSOR

摘要

A pressure control valve (100, 200) comprises a valve seat (140, 160) in which is formed a valve hole (142, 162), a first valve sheet member (110, 210) which covers the valve hole and is provided with a fluid passage (118, 218) thereon, and a second valve sheet member (120, 220) which is provided between the valve seat and the first valve sheet member and covers the fluid passage. Wherein, given that the direction directed from the second valve sheet member to the first valve sheet member is a first direction, when the pressure difference across two sides of the first valve sheet member and the second valve sheet member is directed to the first direction and is greater than or equal to a first preset value, the first valve sheet member is opened; when the pressure difference is directed to a second direction opposite to the first direction and is greater than or equal to a second preset value, the second valve sheet member is opened. Also disclosed is a scroll compressor comprising the pressure control valve. Also disclosed is a scroll compressor comprising a throttle valve for preventing or weakening the return flow from the back-pressure chamber to the pressure chamber.

主权项

1. A pressure control valve, comprising:
a valve seat, in which a valve hole is formed; a first valve disc member, which is configured to shield the valve hole and in which a fluid passage is formed; and a second valve disc member, which is arranged between the valve seat and the first valve disc member and is configured to shield the fluid passage, wherein assuming that a direction directed from the second valve disc member to the first valve disc member is a first direction, when a pressure difference across the first valve disc member and the second valve disc member is directed to the first direction and is greater than or equal to a first predetermined value, the first valve disc member is opened so as to allow fluid to flow through the pressure control valve; and when the pressure difference across the first valve disc member and the second valve disc member is directed to a second direction opposite to the first direction and is greater than or equal to a second predetermined value, the second valve disc member is opened so as to allow fluid to flow through the pressure control valve.