Selection of cooling fan blade spacing: as the evaporator commonly used in refrigeration system, the selection of cooling fan blade spacing directly affects the efficiency of refrigeration system.As is known to all, different fin spacing is adopted for the cooling fan according to the required ambient temperature.Our common cold fan, fin spacing is 4mm, 4.5mm, 6-8mm, 12mm, 18mm, and back and forth variable blade spacing.Fin spacing is small, suitable for high temperature environment;The lower the temperature of the cold storage, the greater the distance between the required fins.If the selection is not reasonable, the frosting speed of the fin is fast, and the air passage will be blocked soon. It is difficult for the cold storage to cool down, and the efficiency of the compressor cannot be brought into play, resulting in an increase in the power consumption of the refrigeration system.According to engineering experience, the general environment of 0 ℃ ~ 20 ℃, such as workshop air conditioning, a cool library, cold storage hall, fresh, and controlling, ripening library, etc., choose piece of air cooler for 4 mm or 4.5 mm;- 16 ℃ to 25 ℃ environment, such as low temperature refrigeration and low temperature logistics base, choose piece of air cooler for 6 mm to 8 mm;25 ℃ ~ 35 ℃ - frozen library, generally selected from 10 mm and 12 mm of cooling fan, if the goods is frozen humidity is big, will choose to change from the cooling fan, into the wind side fin spacing can reach 18 mm.

But there are some occasions, it is not simple to choose according to the temperature of air cooler fin spacing, such as meat, vegetables, fast precooling, PaiSuan, although cold room temperature usually set at 0 ℃ above, because of the high temperature, cooling speed, humidity is big, the goods if you choose from 4 mm or 4.5 mm air cooler, is not appropriate, must use piece from 8 mm even 10 mm air cooler.

There are similar to the storage of fresh garlic, apples and other fruits and vegetables, appropriate storage temperature is in commonly - 2 ℃, as the storage temperature is lower than 0 ℃ preservation or controlling, also need to choose piece from the cooling fan is not less than 6 mm, to avoid rapid frosting cause air duct blockage, increase power consumption.