| 摘要 |
PURPOSE:To control the temperature of mixed water with rapid response and with a high accuracy, by controlling the temperature of water by an electric means through detection of the temperature of mixed water while keeping the pressure on a water feeding side and that on a hot-water feeding side equal to each other. CONSTITUTION:With opening of a hot-water supply cock, only cold water on the side of a water feed pipe 10 is supplied at first. However, when a differential pressure is produced on the opposite sides of an orifice 31, a shift 38 of a flow detector 32 is moved upward, so that a switch contact 39 is opened and the state for full closing of a control valve 15 is cancelled. Then, the temperature of water in a mixing pipe 13 is detected by a temperature detector 29 and compared with a setting temperature. Here, if it is lower than the setting temperature, the control valve 15 is moved in its opening direction. Further, pressure change on the upstream side of the control valve 15 is transmitted to a pressure chamber 6 in a pressure control valve 1 via a pressure transmitting pipe 16, and the pressure control valve 1 operates to shift its control valve body 8 such that pressure in the pressure chamber 6 and that in a pressure chamber 5 are kept substantially equal to each other. |
