Abstract: An automatic cleaning and spraying device includes a mixer connected in series with a gas pipeline of the spraying device. A cleaning liquid (such as a solvent) introduced by the mixer is guided to a controlled cleaning liquid valve installed at the front end of the cleaning liquid pipeline, so that the cleaning liquid can be mixed with a gas, and then the mixed liquid and gas flow towards a spray valve and an atomizer. During a normal spray operation, only the pressurized gas valve and spray valve are turned on for the actual spray operation. After a specific period of operation, the cleaning liquid valve may be controlled automatically to input the cleaning liquid to the mixer and then to the spray valve and atomizer in order to clean the surrounding and inner wall of the spray outlet and achieve the effect of cleaning the spraying device automatically.

Abstract: A liquid mixture supplying device is provided for mixing a liquid mixture of a liquid and a powder and supplying the liquid mixture to a spray valve for spraying. The device has a structural design consisting of a containing vessel, a driving device, a dip tube and a scraper. The containing vessel is provided for storing the liquid mixture, and the driving device drives the containing vessel to rotate while a scraper disposed on a side of a dip tube is being used for distributing the liquid mixture. The containing vessel is installed in a tiltable external cavity, and a flow barrier is formed on an inner wall of the containing vessel, and the driving device drives the containing vessel to move by a magnetic force or a transmission shaft, so as to achieve the effect of uniform mixing.