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經營性冷藏庫的作用，本身就是為市場經濟服務的．其功能也應隨著市場結構的變化而變化。冷庫制冷系統運行中。
The effect of cold storage for commercial purposes is itself in the service of the market economy. Its function should also changes with the change of market structure. In the operation of the cold storage refrigeration system.
由于冷庫內的空氣具有一定濕度，且庫房中制冷設備蒸發器表面溫度通常低于庫內空氣的露點溫度，所以當空氣流過蒸發器表面時就會析出凝結水并結霜。
Because the air has a certain degree of humidity inside the refrigerator, and refrigeration equipment in air Chambers evaporator surface temperature is usually lower than the dew point temperature, so when precipitation occurs when air flows through the evaporator surface water and frost.
尤其在冷藏果蔬產品時，由于庫內空氣要求含濕量很高，又需要定時補充定量的室外空氣換氣，結霜更為嚴重.通常在空氣相對濕度大50%，溫度在一1—7℃ 左右時最容易結霜，而空氣干球溫度在一5—5℃范圍，相對濕度 ≥85%時則結霜最為嚴重。
Especially in the frozen fruit and vegetable products, moisture content is very high because of the rolls air requirement, and need regular supplement quantitative outdoor air ventilation, frost is more serious. Usually the air relative humidity 50%, temperature in a 1-7 ℃ or so the easiest way to frost, and the air dry bulb temperature in a range of 5-5 ℃, relative humidity of 85% or higher, frost is most serious.