| 摘要 |
PROBLEM TO BE SOLVED: To naturally easily discharge water in a water supply route when a pump is stopped by providing a bypass pipeline branched from the midway of a route of a vertically downward of a discharging pipeline and opened at its end. SOLUTION: An open end 29 of a terminating end of a bypass pipeline 30 is sufficiently higher upward in height from a connector of a bypass pipeline 30. For example, the end 29 is provided to be opened to the atmosphere at a position higher by (h) from a water level L when a water supply tank 27 is fully filled. Accordingly, when a pump is operated so that water in the tank 27 is supplied to an icemaking tray 22, water from the open end 29 is not leaked. When the pump 26 is stopped, external air flows into the pipeline 30 from the end 29 so that residual waters in the pipeline 30 and the pipeline 28 flow into the tray 22. Meanwhile, residual waters in the pump 26 and a suction pipeline 24 are recovered to the tank 27.
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