| 摘要 |
PROBLEM TO BE SOLVED: To provide an air supply device for supplying high pressure air by switching into a plurality of supply passages using a passage switching valve to provide constitution technology of the passage switching valve having high reliability. SOLUTION: In the passage switching valve 220 of a blower, a valve element 234 is driven by a solenoid mechanism 236 having alternate current and is abutted on a first valve seat 240 communicating with a first supply passage 218. The valve element 234 is driven by a spring 238 and is abutted on the first valve seat 240 communicating with a second supply passage 219. The first valve seat 240 is provided with a thin-walled piece 242a protruding by opposing to the valve element 234 and having a membrane type seal shape on a first face 242. This thin-walled piece 242a lets elastic repulsion force in the direction different from the direction of moving of the valve element 234 act for the valve element 234 when the valve element is abutted to suppress elastic repulsion force of the first valve seat 240 acting on the valve element 234 to proper level. COPYRIGHT: (C)2005,JPO&NCIPI |
