Document Type and Number:
Japanese Patent JPH0341737
Kind Code:
B2
Abstract:
PURPOSE:To conduct water level detection at a spot outside of a bath room and make it possible to adjust set water level covering a wide range by using a semiconductor pressure sensor and storing in a memory its value when a set output and the sensor output coincide with each other. CONSTITUTION:A solenoid valve 17 for automatic hot water supply and a solenoid valve 22 are opened and a pump 7 is operated to supply hot water by a passage from an outgoing pipe 5 to a bath tub 4 through a heat exchanger 3 for bath. To a diffusion type semiconductor pressure water level sensor 9 the pressure caused by the water level of a bath tub 4 is added, and its output is compared with an output value corresponding to a set water level set arbitrarily between the lowest water level and the full water level by means of a comparator. When an output over an output value is detected, a solenoid valve 17 for automatic hot water supply and a solenoid valve 22 are closed to stop the pump 7. It is, therefore, possible to supply hot water automatically to a bath tub 4 that is located remote from a desired water level. Further, even if air is mixed in the piping at the outset, the water level can be stopped exactly at a desired water level.
Application Number:
JP16893686A
Publication Date:
June 25, 1991
Filing Date:
July 15, 1986
Export Citation:
International Classes:
A47K3/00; E03C1/05; F24H1/00; G05D9/12
Next Patent: JPH0341738