the legendary and high-tech refrigeration compressors
Friday, June 10th, 2011
Refrigeration compressors refer to the compressing refrigeration compressor.For its conditions of use and compressed medium is different,it is different from general air compressor. refrigeration compressors are similar to air compressor.It also can be divided into several different forms of centrifugal such as piston, screw etc.,Refrigeration compressor is one of the most important part in compressing refrigeration equipment.There are two kinds of refrigerators,one is water-cooled and the other is air-cooled.And the refrigeration effect of water cooled is good.but it need cooling water.The air-cooled one is flexible and convenient which is suitable for water-deficient area.
The sublimation efficiency of frozen samples depends on several factors.The most important one is the drought head between frozen products and accumulator.The most effective freeze-drying occurred in sample which could take the highest temperature while still remain frozen.Meanwhile the temperature of collector and system in the vacuum can achieve and maitain minimum value.The change of drying time depend on the eutectic temperature of freeze-drying material.For the vast majority of biological materials,the temperature is below 0℃ while sometimes may below -40℃.
I would like to take this opportunity to give you some advices toward the selection of lubricating oil for refrigeration compressors.In consideration of the special job nature of refrigiration compressor,some cooresponding requirements are pointed out according to lubrication medium.Therefore,people developed a special freezer lubricating oil.When you choose lubricating oil,you should comprehensively analyze and compare according to the refrigeration compressor's type, the type of refrigerant it used, evaporation temperature and the specific working conditions(speed , load, working environment, etc.) in order to ensure the specifications or brand of lubricating oil.
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