Mopping module and cleaning head

A cleaning head, comprising:

• a mopping module, comprising:
• a water tank, provided with at least one water tank hole at a bottom of the water tank, wherein the water tank hole communicates with an interior of the water tank;
• a mopping cloth, provided outside the bottom of the water tank;
• and
• a water amount control mechanism, comprising a knob and a water control tray, configured to adjust an amount of water flowing from the water tank to the mopping cloth through the water tank hole by controlling cooperation of the water control tray and the water tank hole via the knob, wherein the knob comprises a knob upper-cover, a knob screw, and a knob rod which are fixedly connected in sequence, and the knob upper-cover is provided on an upper surface of the water tank, the knob rod is rotatably penetrated into the water tank, the knob rod comprises a step-shaped columnar rod body with a smaller-diameter upper portion and a larger-diameter lower portion, and the water control tray is integrally provided outside a lower end of the knob rod;
• and
• a vacuum cleaner module, detachably engaged with the mopping module;
• wherein the vacuum cleaner module is engaged with the mopping module through a mounting portion provided on the mopping module, a bottom surface of the mopping module is in contact with a ground to be cleaned, and a bottom surface of the vacuum cleaner module is separated from the ground to be cleaned.