How to choose the cooling fan spacing during cold storage construction

The air cooler is an evaporator commonly used in ice machines and cold storage, and its selection directly affects the efficiency of the refrigeration system. Air coolers are known to use different fin spacings depending on the desired ambient temperature. Our common ice making machine have 4mm, 4.5mm, 6-8mm, 10mm, 12mm fin spacing, as well as front and rear variable blade spacing. The fin spacing is small, suitable for high temperature environments; the lower the cold storage temperature, the larger the fin spacing required.

YT-E-007 2.5L Electric AC 220-240V Portable Ice Maker


If the selection is unreasonable, the fins will quickly frost, which will quickly block the air passage, the cold storage is difficult to cool down, and the compressor efficiency cannot be used, resulting in an increase in the cooling power consumption of the system. According to cold storage engineering experience, generally 0℃-20℃ environment, such as workshop air conditioner, shady warehouse, cold storage hall, fresh-keeping warehouse, air-conditioning warehouse, maturing warehouse, etc., choose 4mm or 4.5mm air cooler with asphalt; -16℃~-25 ℃ environment, such as low-temperature freezer, low-temperature logistics warehouse, use the air cooler with the plate spacing of 6mm-8mm; for the quick-freezing warehouse of -25℃~-35℃, generally choose the air cooler with the plate spacing of 10mm and 12mm.

If the humidity is high, the variable fin spacing cooling fan will be selected, and the fin spacing on the air inlet side can reach 16mm. However, there are also some occasions where the fin spacing of the air cooler cannot be selected only based on the temperature, such as rapid pre-cooling of meat and vegetables, acid discharge, etc. Although the temperature of the cold storage is generally set above 0 °C, due to the high incoming temperature, the temperature is lowered, the speed of the goods is fast, and the humidity is high. If the air cooler with a plate spacing of 4mm or 4.5mm is used, it is not suitable.

Air coolers with a sheet spacing of 8mm or even 10mm must be used. There are also fresh-keeping warehouses similar to the storage of fruits and vegetables such as garlic and apples. The suitable storage temperature is generally -2°C. For such fresh-keeping or air-conditioned warehouses where the storage temperature is lower than 0°C, cold air with a spacing of not less than 8mm is also required. So as not to block the air duct due to rapid frost formation and increase power consumption.