The ice-tube mechanism is the evaporator, which is composed of many vertical parallel pipes. The diffuser at the top of the evaporator spreads the water evenly over each steel pipe in a spiral way. The excess water is collected from the bottom water tanks and pumped back into the evaporator.
The outer space of the steel pipe has refrigerant flowing and heat exchange with the water in the tube, and the inland waters cools down gradually. When the thickness of Guan Bing reaches the desired value, the water automatically stops flowing. Refrigerant heat enters the evaporator and causes the tube ice to melt off. When the tube ice falls, the ice cutter runs, cut the tube ice into the set size.