An air conditioning is the domestic refrigeration industry well-known professional equipment manufacturers and large refrigeration systems integrators, cymbals, environmental technology (Shanghai) co., LTD., with constant temperature and humidity equipments, the purpose is to solve the high humidity in cold storage and the quality of the materials have an effect in cold storage, at the same time in the lower humidity can reduce customer operation load of cold storage refrigeration system, which can better reduce operating costs; Save more resources for customers.