JPS6148208U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is an embodiment of a conventional water supply off/delay system,
FIG. 3 shows an example of a conventional on-delay system, and FIG. 4 shows an example of a conventional three-position water supply system. 1 is the boiler, 2 is the water surface control box, 3 is the upper detector, 4 is the middle detector, 5 is the lower detector, 6
is a controller, 7 is a water supply pump, 8 is a check valve, 9 is a combustion device, 10 is a blow valve, and 11 is a water level detector.

Claims (1)

[Scope of claim for utility model registration] Water level control box 2 communicating with boiler 1
, inside the water level control box, a higher level detector 3, a middle level detector 4, and a lower level detector 5 detect the water level of the boiler in stages; a water supply pump receiving a water level detection signal from the higher level detector 3; It outputs a stop signal and a combustion start signal, receives the water level undetectable signal from the intermediate detector 4 and outputs a water pump operation signal, and the set time _t1 elapses at the receiver of the water level undetectable signal. If the water level in the boiler does not return to the water level detection position of the middle level detector or higher at this point, a combustion stop signal is output, and a combustion stop signal is also output in response to the water level detection impossible signal from the lower position detector 5. A water supply control device comprising a controller 6.