Inferior refrigerants will affect the operating performance and stability of the system, and will even cause damage to system components and compressors. There are several ways to identify whether it is inferior 1234yf refrigerant:
1. Connect the pressure gauge to the test. If the measured pressure value is lower than the corresponding saturated pressure value at the ambient temperature by more than 2kg/f, it can be judged that the refrigerant is a substandard product, and its use is prohibited! For example: the ambient temperature is 20 degrees, the measured pressure value is 7.1kg/f, which is far lower than the saturation pressure value 13.5kg/f that the refrigerant at this temperature should reach, then the refrigerant can be judged as a substandard product. 2. Foam detection method, foam detection method is useful for refrigerants containing chloromethane and other corrosive gases, and the corrosion degree of foam is related to the content of chloromethane. The higher the content, the more obvious the effect, and the lower the content, the The effect is less obvious.
3. 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. In addition, whether the refrigerant can be purchased through formal channels, such as the refrigerant whose price is significantly lower than the market price, should be highly vigilant. 4. If you have testing conditions, it is recommended to check the purity and acidity of the refrigerant before using it. It is not recommended to use the refrigerant whose test result is obviously lower than the industry standard. Note: The purity of qualified R22 refrigerant should be greater than 99% (the purity of good refrigerant should be greater than 99.8%), and the acidity should be less than 0.0001. 5. During the commissioning and operation stage of the system, no other abnormal conditions were found after inspection, and the refrigeration capacity was insufficient; the dryer or expansion valve was blocked, and the blockage was a yellow-brown wax-like or black sludge-like foreign matter, etc., it is recommended to extract refrigeration from the system Purity testing of refrigerants to check for the danger of defective refrigerants.
Shenyang Zhongda Huanxin Refrigeration Technology Co., Ltd.
