Hard floor nozzle for vacuum-cleaning and wiping of hard floor, has control unit permitting or preventing supply of liquid to wiper depending on operation of nozzle during operation process of suction of low pressure

摘要

The nozzle has a liquid supply device for a wiper, and a control unit (135) permitting or preventing the supply of liquid to the wiper depending on the operation of the nozzle during operation process of suction of low pressure. The control unit is a valve (136) for opening and closing a supply pipe of the liquid supply device. The valve is arranged on the supply pipe that connects a fluid tank and a pump. The valve has a housing container (140), which is divided into two control unit chambers (141, 142) by a control unit membrane (139) in an air-proof manner.