e cooling temperature uniformity: stainless steel body air drawn by a vacuum pump, the vacuum dwindling food surface water evaporation, rapid cooling temperature, while the degree of vacuum in the vacuum chamber (pressure) is the same everywhere, so the food inside and outside temperature uniformity;
3. To avoid environmental pollution for food again: After the completion of vacuum cooling，in the housing complex pressure feed gas, which air is filtered gas that is free of dust suspended matter