The WZXS integral direct-cooling type refrigerating tanks are mostly used as milk cooling tanks, or for different liquid material storage, such small-scale milk collection stations, dairy processing plants, slaughtering factories, food industry and medicine. They are made out of tank body, blender, refrigerating unit and electric control. The tank body is made out of SUS304/316 stainless steel with a high-quality polish that offers dust and corrosion resistance. The tank body also contains a heat preservation layer, that is filled by hard foam plastics of low heat-conducting efficient and is very lightweight.