| 摘要 |
PURPOSE:To supply a certain quantity of water without subjecting a tank or the like to a specific work, by providing an integrate flow rate display device to detect the quantity of hot water in a boiler. CONSTITUTION:When a boiler body 1 detects that a hot water supply cock 4 is opened to start the supply of hot water, it fires a burner to heat water supplied from a pipe 2 so that hot water discharged from the hot water supply cock 4 has a prescribed temperature. A flow rate sensor 5 provided in the pipe 2 outputs the pulse train signal having a frequency proportional to the flow rate of water, and it is supplied to a flow rate integrate display circuit 6. The flow rate integrate display circuit 6 consists of a monostable multivibrator, an F/V converter, a V/I converter, an integrating circuit, a comparator, and a display device to display the fact that the integrte flow rate reaches a certain value. Thus, it is detected easily that a certain quantity of water is supplied. |
