A milk cooling tank is a large-scale refrigeration unit designed specifically for cooling and storing fresh milk. It typically comprises components such as a stainless-steel tank body, a refrigeration system, an agitation system, and a control system. Its core functions are primarily twofold:

Rapid Cooling

Freshly milked milk has a relatively high temperature-generally around 35°C to 40°C-which creates an ideal environment for bacterial proliferation. Milk cooling tanks can rapidly lower the milk's temperature to 4°C or below. This quick cooling inhibits bacterial growth and reproduction within a short timeframe, thereby maximizing the preservation of the milk's nutritional content and freshness. For instance, promptly transferring milk to a cooling tank after milking effectively controls bacterial counts from the outset, laying a solid foundation for subsequent processing and transportation.

Constant-Temperature Storage

Following the cooling process, the tank maintains the milk at a stable, optimal temperature-usually between 2°C and 4°C. This function ensures that the milk's quality remains unaffected by temperature fluctuations while it awaits transport or further processing. Whether in the heat of summer or the cold of winter, the tank utilizes its integrated refrigeration system and thermal insulation structure to maintain a constant internal temperature, acting as a "fortress of freshness" that safeguards the quality of the milk.