| 摘要 |
A water server includes a pump (41) which can lift water in an exchangeable raw water container (20) into a water storage tank (30) in a casing (10). The water server further includes a water level sensor (60) in the form of a float sensor capable of detecting the upper limit and the lower limit of the water level in the water storage tank. The water server further includes a controller (70) adapted to activate the pump (41) upon receiving a sensor input indicative of detection of the lower limit (Step S2), and deactivate the pump (41) upon receiving sensor input indicative of detection of the upper limit (Steps S3 and S5). The controller (70) is further adapted to measure the time elapsed since the pump was activated (Step S2), and deactivate the pump (41) when the time elapsed reaches a predetermined time at which the water level exceeds the upper limit and at which water in the water storage tank (30) has not yet overflown the water storage tank (30) (Steps S4 and S5), thereby preventing overflow of the tank. When the pump (41) is deactivated, the controller (70) resets the input data from the water level sensor (60) (Step S6) instead of locking the pump (41). |
