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介紹冷庫除霜的四種常用的方法
Introduce the four common methods in defrosting the refrigerator
1、超聲波除霜是節能明顯的除霜方法，應進一步研究超聲波發生器的布置規律，提高除霜徹底程度，以便工程應用。
1, ultrasonic defrost is evidently energy-saving defrosting method, should be further studied the layout of ultrasonic generator, increase the degree of defrost completely, so that the engineering application.
2、適用于小型系統的熱氣除霜，系統和控制方法簡單，除霜速度快、均勻且安全，應進一步擴大應用范圍。醫藥冷庫
2, suitable for hot gas defrosting of small systems, systems and control method is simple, fast defrost, uniform and safe, should further expand the application range.
3、氣動除霜特別適用于需要頻繁除霜的制冷系統，雖然需要增加專用氣源和空氣處理設備，只要利用率較高經濟性會很好。
3, pneumatic defrosting is particularly suited to need frequent defrosting refrigeration system, although the need to increase the special air supply and air handling equipment, as long as the higher utilization efficiency will be very good.
4、液體冷媒除霜，制冷過程和除霜過程同時進行，在除霜期間沒有附加能耗，冰霜冷量用于過冷膨脹閥前的液體制冷劑，提高制冷效率使得庫溫能夠得到基本保持，液體冷媒溫度在常溫范圍之內，融霜期間蒸發器溫升小，對蒸發器傳熱的惡化作用不大。缺點是系統復雜控制繁瑣。

4, liquid refrigerant defrosting, refrigeration and defrosting process simultaneously, no additional energy consumption during defrosting, frost cold quantity used in supercooled liquid refrigerant before expansion valve, improve the efficiency of refrigeration makes library can get basic to keep warm, liquid refrigerant temperature in normal temperature range, evaporator temperature rise during the defrosting, the deterioration of heat transfer of evaporator. The disadvantage is the complex control system trival.

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