Drainage pump detection circuit and control method

The invention discloses a discharge pump detection circuit and a control method, and the discharge pump detection circuit comprises a preset power input end, an MCU and a drive detection module. The MCU comprises a first level output pin and a voltage detection pin; and the driving detection module is an access composed of a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a sampling resistor, an MOS transistor and a first diode. The drainage pump control method comprises the steps that the drainage pump detection circuit serves as an execution carrier, the voltages at the two ends of a sampling resistor connected with the drainage pump are detected at a preset time interval, and a real-time voltage value is obtained; the real-time voltage value is compared with a preset first threshold value and a preset second threshold value to obtain the working state of the clean discharge pump. According to the discharge pump detection circuit and the control method provided by the invention, whether the discharge pump has empty pumping can be automatically judged, and timely control is carried out to reduce noise; and meanwhile, fault alarming is carried out in time when the drainage pump is blocked.