| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water filling control device in which hot water between an electromagnetic valve and a filter can also be easily drained.SOLUTION: An electromagnetic valve is provided in a hot water supply passage for connecting a hot water supply device and a bathtub, and a filter for removing a foreign substance is provided at an upstream of the electromagnetic valve, and a check valve is provided at a downstream of the electromagnetic valve. Between the electromagnetic valve and the check valve, an atmosphere releasing valve which opens by detecting pressure drop of clean water is connected. Furthermore, between the electromagnetic valve and the filter, a negative pressure releasing valve which opens by a negative pressure is connected. Thereby, the atmosphere releasing valve opens just by draining the inside of the passage for supplying the clean water to the hot water supply device, so that hot water between the check valve and the electromagnetic valve is drained. Also, when the hot water in the hot water supply passage from the hot water supply device is drained, the negative pressure generating between the electromagnetic valve and the filter is released by the negative pressure releasing valve, so that the hot water between the electromagnetic valve and the filter also comes to pass through the filter, and the hot water between the electromagnetic valve and the filter can be drained, too. |
