Supply and recovery device

The utility model discloses a supply and recovery device. The device comprises an air compressor, a liquid storage tank and a disinfection tank which are sequentially connected, the bottom of the disinfection tank is higher than the top of the liquid storage tank, the liquid storage tank is provided with a disinfectant flowing pipe, an air pipe connector and a disinfectant connector, one end of the disinfectant flowing pipe is arranged at the low liquid level position in the liquid storage tank, and the other end of the disinfectant flowing pipe is communicated to the bottom of the disinfection tank through the disinfectant connector and a first switch valve. An air inlet pipeline is arranged between the air compressor and the air pipe connector, a three-way valve is arranged on the air inlet pipeline, a second connector and a third connector of the three-way valve are communicated with the air pipe connector and the air outlet end of the air compressor respectively, and a first connector is connected with an