How to identify the authenticity of chlorodifluoromethane r-22 refrigerant?

　　Chlorodifluoromethane r-22 refrigerant is used as a refrigerant for industrial, commercial, household, and other air-conditioning systems; it can also be used as a pesticide, aerosol propellant for spray paint and fire extinguishing agent, and is also a basic raw material for the production of fluorine-containing polymer compounds.

　　How to identify low-quality chlorodifluoromethane r-22 refrigerant, first of all, when choosing a refrigerant, you must choose a brand refrigerant. For other refrigerants, we can use the following methods to make a simple judgment:

　　Method 1: Turn the refrigerant tank upside down and release a small amount of refrigerant onto a piece of white paper. If there are obvious impurities or liquid water on the white paper, it means that the quality of the refrigerant is not good and it is not recommended to use it;

　　Method 2: Connect the pressure gauge to test the refrigerant bottle pressure, and compare the refrigerant temperature and pressure characteristic table to check whether the pressure in the bottle is within the normal range. If the pressure is abnormal, it is not recommended to use it.

　　Method 3. When the refrigerant is half used, the pressure in the bottle can be tested again. For a single-component refrigerant such as chlorodifluoromethane r-22, the two measured bottle pressure values ​​should be very close, but for inferior refrigerants, usually mixed with There are many kinds of components. After the refrigerant in the bottle is used, the bottle pressure will usually be quite different due to the change in the composition ratio. The agent is drained cleanly to avoid contamination of the system.

　　Method 4: During the system debugging and running phase, if the following abnormal phenomena are found

　　1) When the refrigeration capacity of the system is insufficient and no other abnormality is found after inspection, you need to pay attention to the refrigerant; 2) When the filter or expansion valve of the system dryer is blocked, and the blockage is a yellow-brown wax-like or black sludge-like foreign matter Refrigerant needs to be concerned;

　　3) If the high and low-pressure pressure or temperature is abnormal during the system operation, or the system balance pressure is abnormal in the shutdown state (refer to the refrigerant temperature and pressure characteristic table), you need to pay attention to the refrigerant.

　　When these abnormal phenomena occur, it is recommended to extract the refrigerant from the system for purity testing to check the risk of inferior refrigerant.

　　During this period, it is recommended that the compressor side refrigerant be evacuated or the whole system refrigerant should be released to avoid potentially poor quality refrigerant coming into contact with the compressor and damaging the compressor.