| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressure control valve preventing icing of the surroundings of a valve when opening degree of the pressure control valve is small. <P>SOLUTION: A valve 31 of the pressure control valve 24 is constructed of a plane portion 31b having nearly identical outline to the inner circumference of a housing 30 and a spherical portion 31a slide-contacting the housing 30. On downstream side of the valve 31, the housing 30 is separated into a communicating portion 40 and a second chamber 39, and a straightening portion 32 where the inner wall edge slide-contacting the valve 31 slide-contacts the spherical portion 31a is provided. Then, when the inclined angle of the valve 31 is small, the inner wall edge of the second chamber 39 contacts the spherical portion 31a and the second chamber 39 is closed, thereby, air is flowed only in the first communicating portion 40. <P>COPYRIGHT: (C)2008,JPO&INPIT |
