| 摘要 |
PROBLEM TO BE SOLVED: To prevent a valve housing from being damaged by the freezing of water remaining in a communicating line after the stop of water supply in a water supply valve device wherein a first solenoid valve 12<SB>1</SB>on the inflow port side and a second solenoid valve 12<SB>2</SB>on the outflow port side are arranged in a valve housing 11 having an inflow port 111 and an outflow port 112, and both the first and second solenoid valves are connected in series through the communicating line 113 in the valve housing. SOLUTION: A valve seat 121 of the second solenoid valve 12<SB>2</SB>is located vertically below an vertically uppermost part of the communicating line 113. The volume of a portion located vertically above the valve seat 121 of the second solenoid valve 12<SB>2</SB>, of the communicating line 113 is preferably set to be 10% or higher of the total volume of the communicating line 113. Further, the second solenoid valve 12<SB>2</SB>is closed after the closure of the first solenoid valve 12<SB>1</SB>at the stop of water supply. COPYRIGHT: (C)2008,JPO&INPIT
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