| 摘要 |
PURPOSE:To contrive to highly efficiently heat a bath by a structure wherein the center contact point of a three step switch is connected with the lower left contact point of a float switch, the left contact point of the three step switch is connected with the left contact point of a water pressure switch and the right contact point of the three step switch is connected with the lower contact point of another water pressure switch. CONSTITUTION:When the water level in a bathtub lowers, the left and right contact points of a float switch 6 are closed, resulting in ringing a bel through lead wires 43 and 45 so as to alarm waterless-heating. When a three step switch 40 is closed and a laundry faucet 14 and an outdoor faucet 15 are open, the water pressure in a hot water feed pipe 16 lowers, resulting in lowering the piece of a water pressure switch 13 so as to close the left and right contact points of the switch in order to rotate the driving gear 18 of a gear pump by means of the restoring force of a tension spring 29 or the force of a motor M through lead wires 53 and 54, the closed upper and lower contact points of a water pressure switch 19, lead wires 56 and 48 and the piece of a spring switch 49 and consequently to send the hot water in a bathtub to a pipe 20, the hot water feed pipe and discharge outside from the respective faucets. When the respective faucets are closed, the water pressure in the hot water feed pipe rises, resulting in opening the left and right contact points of the switch 13 so as to cut off the power fed to the lead wire 54 and those which follow in order to stop the rotation of the driving gear 18 of the pump and to stop the feeding of hot water. |
