Intelligent dual-mode electric floor brush

An intelligent dual-mode electric floor brush, comprising a control circuit (100) and a floor brush motor (300), wherein the control circuit (100) is connected between a power supply (200) and the floor brush motor (300) to control a work voltage at the floor brush motor (300), and the control circuit (100) comprises:

• a conversion unit (11) that is connected to an output end of the power supply (200) and an input end of the floor brush motor (300) and converts a first voltage of the power supply (200) to a second voltage;
• a sampling unit (13) connected to an output end of the floor brush motor (300), so as to generate a sampled voltage according to a sampled current at the floor brush motor (300);
• a comparison unit (14) connected to the sampling unit (13), wherein the comparison unit (14) is configured to generate a reference voltage and compare the reference voltage with the sampled voltage to generate a switch voltage;
• and
• a switch unit (12) that is connected to the comparison unit (14), the power supply (200), the conversion unit (11), and the floor brush motor (300) and transmits the first voltage or the second voltage to the floor brush motor (300) according to a state of the switch voltage.