Device structure for automatically opening and closing wastewater tank valve of cleaning machine

A device structure for automatically opening and closing a wastewater tank valve of a cleaning machine, comprising a cleaning machine body (1), wherein a water-air separation chamber (2) is provided at a top of the cleaning machine body (1), a sewage tank (3) is detachably mounted at a bottom of the cleaning machine body (1), one end of the water-air separation chamber (2) is connected to a water drawing pipe and the other end of the water-air separation chamber (2) is connected to a main motor (4) having a suction function, a drain port (201) is provided at a bottom end of the water-air separation chamber (2), a wastewater tank inlet (301) is provided at a top end of the wastewater tank (3), and the drain port (201) is communicated with the wastewater tank inlet (301);

• and the wastewater tank inlet (301) is cooperated with a water closing valve (5), the water closing valve (5) is connected to a drive device which is capable of driving the water closing valve (5) to open and close the wastewater tank inlet (301), the drive device is connected to a main control board (6) with wires, and the main motor (4) is connected to the main control board (6) with wires.