What effect does refrigerant purity have on the system?

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 has obvious cooling effect, and the temperature drops quickly. , The refrigeration capacity is large; the low-purity refrigerant not only fails to reach the desired temperature drop, but also damages the compressor. So what are the negative effects of low refrigerant purity?

1. High moisture and high acidity will severely corrode the internal piping system of the compressor, causing blockage inside the compressor and shortening the service life of the compressor.

2. It is easy to leak, there is no fluorine in the refrigeration system, the compressor has been idling, the operating temperature is high, and the parts are worn out, which will also shorten the service life of the compressor.

3. Increase the operating load of the compressor, increase the power consumption, and increase the expenditure.

4. Some low-quality refrigerants are even mixed with a lot of flammable and explosive gases, which seriously affect people's lives and property safety.

5. The cooling effect is poor, and problems are frequent. Although the inferior quality refrigerant will temporarily feel cool, the temperature is always difficult to drop, and the expected cooling effect cannot be achieved.

6. Freon in the refrigerant, once leaked, it will destroy the ozone layer and cause great harm to the atmosphere on which humans depend.

Refrigerants have made a great contribution to changing the living environment of human beings, but people’s understanding of refrigerants is still at a preliminary stage, thinking that only the refrigerant for refrigeration is enough. In fact, it is not the case that the original refrigerants from large manufacturers are strictly controlled by the sample inspection, the purity inspection equipment is sophisticated, and the quality is guaranteed. However, some small distributors, driven by huge profits, subpackage the refrigerant produced by the original factory and sell it. The refrigerant equipment for the subpackage is simple and cannot control the contact space between the refrigerant and the air, which easily leads to the air content in the refrigerant. Exceeding the standard, there is too much water, and the phenomenon of ice blocking occurs after charging the refrigeration equipment. If there is a problem with the refrigeration equipment and the compressor is damaged, then it is really not worth the loss.

Inferior refrigerants will affect the performance and stability of the system, and more seriously will cause damage to the system components and compressors. The following methods can be used to identify whether it is a low-quality refrigerant:

1. Whether to purchase a refrigerant produced by a regular manufacturer through a regular channel, such as a refrigeration whose price is significantly lower than the market price It should arouse a high degree of vigilance.

2. If you have the test 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 results are significantly lower than the industry standard .

3. 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:

[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 indicates that the quality of the refrigerant is not good. It is not recommended to use;

[2] 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, such as 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 u200bu200bshould be very close, but for inferior refrigerants, multiple components are usually mixed. After the internal refrigerant is used, the bottle pressure usually varies greatly due to the change of the composition ratio. 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.

4. During the system debugging and operation stage, if the following abnormal phenomena are found:

1) The system's cooling capacity is obviously insufficient and After inspection, no other abnormalities are found, the refrigerant needs to be paid attention to;

2) The system dryer filter or expansion valve is clogged, and the clogging is yellow-brown waxy or black Pay attention to refrigerant when sludge-like foreign matter;

3) Abnormal high and low pressure or temperature occurs during system operation, or abnormal system balance pressure during shutdown (can be compared with refrigeration Temperature and pressure characteristics table), the refrigerant needs to be paid attention to. When these abnormal phenomena occur, it is recommended to extract refrigerant from the system for purity testing to troubleshoot the risk of inferior refrigerant. During this period, it is recommended to empty the refrigerant on the compressor side or release the refrigerant from the entire system to avoid potential inferior refrigerant from contacting the compressor and damaging the compressor.

Once it is found that the unit components or the compressor are malfunctioning due to chemical pollution caused by inferior refrigerant, then the unit that used the same source of refrigerant in the site (even if the unit is still normal Work) also need to replace the refrigerant. Because the influence of harmful chemical components in low-quality refrigerants is sometimes slow, it may cause system failure after a long period of use.

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