It is well known that kitchen grease has high adhesion and it is difficult to clear and clean ordinary water. The 'hot dry cleaning' technology is based on the principle that the condensed oil stain will melt and liquefy when exposed to high temperature. A layer of adhesive safety silicone heater pad is added on the surface of the hood of the range hood. The silicone heater pad sheet is a flexible heating element. Thin, fast heating, no space occupation) When the surface of the volute is heated to a safe temperature (60°-65°) by heating the electric heating sheet, the stubborn grease will be cracked and melted from the deep layer to the surface layer; and then the centrifugal force is rotated by the wind wheel. Oil particles, oil stains, etc. drip along the volute wall and the edge of the wind wheel and automatically flow into the oil cup. Under the action of high temperature radiation of 65 °C for 10 minutes and high-speed centrifugal force, the grease is completely liquefied and then taken out and dried. One button can ensure the inside of the machine is clean and dry, and the safety of the family is guaranteed.