Counting the three major elements of the refrigerant in the high and low temperature test chamber

For equipment such as high and low temperature test chambers that require low temperature testing, it is clear that the low temperature is accomplished by the compressor. If the test chamber is to be at a temperature below room temperature, a compressor must be provided. However, the cooling effect depends on the good or bad cooling effect of the compressor, and the good and bad of the compressor and the length of the service life are all inseparable from the refrigerant. So how do we choose the right refrigerant to ensure the cooling effect of the compressor?
1. First, the temperature of the refrigeration should be considered: Since many high and low temperature test chamber manufacturers can now do the temperature test of -80 °C, the requirements for the refrigerant are higher, and the high temperature is selected according to the temperature of the refrigerant and the cooling conditions. Low pressure), medium temperature (medium pressure), low temperature (high pressure) refrigerant. The standard evaporation temperature of the normally selected refrigerant is 10 ° C below the refrigeration temperature. The choice of refrigerant should also consider the cooling conditions of the refrigeration unit, the use environment, etc., and the condensing pressure during operation should not exceed the specified value of the safe use conditions of the compressor.
2. Secondly, the nature of the refrigerant should be considered: some industries with national regulations must use non-toxic, non-polluting, safe and safe refrigerants, depending on the thermal, physical and chemical properties of the refrigerant. Refrigerant, non-explosive, non-combustible refrigerant; the choice of refrigerant should be good heat transfer, low resistance, and good compatibility with materials used in refrigeration systems.
3. Most importantly, considering environmental protection requirements, refrigerants that comply with national environmental regulations must be selected.
The above three aspects are factors that should be considered when selecting a suitable refrigerant for the high and low temperature test chamber. However, the test box manufacturers generally provide the refrigerant for the customer. However, we also need to consider the choice of refrigerant when the refrigerant leaks and the refrigerant is replaced.