Water level detection control (see the relevant application) circuit and the operating method of the present application is applied to the drainage pump, has been submitted to the Chinese Patent Office on December 27, 2013, application Ser. No. 201310739790.0, entitled 'drainage It claims the benefit of priority of the Chinese patent application that applies water level detection control circuit and its method of operation to 'to the pump, which is incorporated all of its contents in the present application by reference

摘要

power supply unit, to provide a water level detection control circuit and its method of operation to apply to the drainage pump, including the detection unit and the water pump unit. Power supply unit is used to power the detection unit and the water pump unit. The detection unit includes a sensor unit and the comparison unit, the sensor unit is used for the water level position periodically detected in the drainage pump. Comparing unit generates a driving signal according to the comparison result of the first threshold value which is preset sensed value corresponding to the water level position to the detection unit. Water pump unit receives a drive signal from the detection unit, is used to operate the drainage pump at a preset time period. Water level detection control circuit to be applied to the drainage pump of the present invention is capable of preventing the liquid surface waves, the structure is liable to simple assembly of, has the feature that a good reliability, and drain pump mounted in the drain pump It can be formed on the integrated structure. .FIELD 1