How to Chose Suitable Fin Space for A Cold Room Air Cooler??

As the evaporator commonly used in refrigeration system, the selection of air cooler is appropriate or not, which directly affects the efficiency of refrigeration system.  As is known to all, the air cooler will use different fin spacing according to the different cold room temperature required. 

The common air cooler fin spacing is 4mm, 4.5mm, 6-9mm, 10mm, 12mm, and mixing fin spacing in from and back. Smaller fin spacing is suitable for high temperature cold storage;  The lower the temperature of the cold storage, the greater the fin spacing required.  If the selection is not reasonable, fin frost speed is fast, will soon block the channel of the wind, cold storage cooling is difficult, the efficiency of the compressor can not play out, resulting in an increase in the power consumption of the refrigeration system.  

According to the engineering experience, generally 0℃-20℃ cold room, such as workshop air conditioning, cool storage, cold storage hall, fresh storage, air conditioning storage, ripen storage, etc., choose 4mm or 4.5mm fin spacing air cooler;  -16℃~-25℃ cold storage , such as low temperature refrigeration, low temperature logistics warehouse, choose 6mm-9mm fin spacing air cooler;  -25℃~-35℃ fast freezing or Quick-frozen storage , generally choose 10mm and 12mm fin spacing air cooler, the humidity of quick-frozen goods is large, will choose the variable fin spacing air cooler, the air inlet side fin spacing can reach 16mm. 

But there are some occasions, is not simply according to the temperature to choose the air cooler fin spacing, such as meat, vegetables, fast precooling, acid discharge, although the cold room temperature is generally set above 0℃, because of the goods high primary temperature, fast cooling speed, the high humidity ;if choose 4mm or 4.5mm fin distance air cooler, it is not appropriate,  must use of 8mm or even 10mm fin spacing air cooler.  

There are similar to the storage of garlic, apples and other fruits and vegetables, the appropriate storage temperature is generally -2℃, like this storage temperature is lower than 0℃ preservation or air-conditioned cold storage, also need to choose the air cooler with fin distance not less than 8mm, in order to avoid rapid frosting caused by air channel blockage, increased power consumption.