▎ 摘　　要

NOVELTY - The utility model claims a metal closed circulating cold water device for heat treatment, comprising a cold water tank, the cold water tank is provided with a water chamber, the water chamber outer layer is provided with a cooling cavity, the cooling cavity is filled with graphene sponge; two sides of the cold water tank are provided with a refrigerator through bolt; two sides of the cooling cavity corresponding to the refrigerator are provided with a cooling pipe; one side top of the cold water tank is provided with a temperature sensor through a bolt; one side of the top of the cold water tank bolt is provided with a water pump A, the top of the cold water tank is located at one side of the water pump A through the opening is connected with a water outlet hose; the top of the water outlet hose is connected with a water outlet connecting pipe; the other side bolt of the top of the cold water tank is provided with a water pump B. The utility model has good cooling effect; the cooling temperature has a certain heat preservation maintainability, so as to greatly save the energy and improve the environment-friendly property; it is suitable for being widely popularized and used.