How to distinguish the quality of refrigerant in cold storage construction

The refrigerant is an important factor that affects the temperature of the cold storage, and it is especially important to choose a good refrigerant. So how to distinguish the quality of refrigerant in cold storage construction?

The refrigerant is the blood of the compressor. The purity of the refrigerant is particularly important for the cold storage refrigeration equipment. The most obvious phenomenon is: the cold storage filled with high-purity refrigerant, the cooling effect is obvious, the temperature drops quickly, and the cooling capacity Large; low-purity refrigerants not only fail to reach the desired temperature drop, but also damage the compressor. Whether to purchase refrigerants produced by regular manufacturers through formal channels, such as refrigerants whose prices are significantly lower than the market prices, should arouse a high degree of vigilance.

If you do not have the refrigerant detection conditions, it is recommended to perform a simple inspection before using the refrigerant. The simple inspection method can be:

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 refrigerant is of poor quality and is not recommended.

Connect the pressure gauge to test the pressure of the refrigerant bottle, and check whether the pressure in the bottle is within the normal range by comparing it with the refrigerant temperature and pressure characteristic table. If the pressure is obviously abnormal, it is not recommended. And when the refrigerant is half used, the pressure in the bottle can be tested again. For a single-component refrigerant such as R22, the two measured bottle pressure values ​​should be very close, but for inferior refrigerants, multiple components are usually mixed. After the internal refrigerant is used, due to the change of the composition ratio, the bottle pressure usually has a big difference. If such a phenomenon is encountered, it is recommended to stop the refrigerant immediately and discharge the refrigerant that has been charged into the system to avoid it. Pollution system.