| 摘要 |
PURPOSE:To prevent an overflow of poured water through an overflow port from occurring even where the vertical spacing between the water level in a bathtub or the like and a hopper is small, by providing a hopper with a water pouring port at an upper part thereof, a discharging port at the lower end thereof and an overflow port at a side wall thereof, and disposing at the water pouring port a nozzle designed to form a minute gap between an upper inner peripheral surface thereof at an inlet and the peripheral surface of the pouring port. CONSTITUTION:When pouring flow rate is zero, the water level in a bath hot water supplying pipe 9B is equal to that in a bathtub 5, whereas when water is poured, the water level in the pipe 9B becomes higher than that in the bathtub due to the pipe passage resistances of the pipe 9B, a bath heat exchanger 3 and a circulating pipe 4 which constitute a passage on the downstream side of a hopper 11. This rise in the water level is more conspicuous as the pouring flow rate is higher. When the pouring flow rate is high, it exceeds the flow rate of water fed downward through a nozzle outlet port 18, a nozzle 16 is filled up with hot water, and an overflow of hot water occurs through a gap 21 and a slit hole 23 into a discharging port 13. However, since the gap 21 is minute, the overflow quantity is restricted, the pressure inside the nozzle 16 is increased, and the discharge pressure at the nozzle outlet port 18 is increased, whereby the water level in the pipe 9 is forcibly lowered, and the water level can be prevented from being raised. |
