直接制冷系统 direct refrigeration system
直接膨胀供液制冷系统 refrigeration system with supply liqiud direct expansion
重力供液制冷系统 refrigeration system with supply liquid refrigerant for the evaporator by gravity
液泵供液制冷系统 refrigeration system with supply liquid refrigerant for evaporator by liquid pump
间接制冷系统 indirect refrigeration system
融霜系统 defrosting system
热气融霜系统 defrosting system by superheated vapour
电热融霜系统 eletrothermal defrosting system