Cavity cooling device of vacuum coating machine with improved structure

The invention is suitable for the technical field of coating machine auxiliary equipment and provides a cavity cooling device of a vacuum coating machine with an improved structure, comprising a coating machine cavity body, a heat conduction sleeve sleeved on the outer surface of the coating machine cavity body and a radiating water pipe helically adhered to the heat conduction sleeve; a water collecting circular slot is arranged at the lower end of the radiating water pipe; the right end of the water collecting slot is connected with a water pump and a refrigerating machine; the upper end ofthe radiating water pipe is provided with a water inlet circular slot; the right end of the water inlet circular slot is connected with the water pump by a water return pipe; the left end of the waterinlet circular slot is provided with a water inlet; the joint of the right end of the water inlet circular slot and the water pump is provided with a water outlet; the water pump and the refrigerating machine are connected wi