It will been discussed that the influence of increasing the pressure of cooling medium on the weight loss in the process of cooling and freezing of food.
本文探讨了在食品的冷却与冻结过程中，提高冷却介质的压力对食品干耗的影响。
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Because pore medium is filled with water at first, the process of oil and gas migration is that the oil and gas is continually refilled and water escaped under differential pressure.
Gas or liquid pressuremedium can be introduced into the use process, which is suitable for various kinds of heat exchangers with different media types.