Teach You How To Identify The Cold Storage Inferior Refrigerant Resolution Method

- Apr 30, 2019-

Teach you how to identify the cold storage inferior refrigerant resolution method

The use of inferior refrigerant in the cold storage installation process will not only affect the system performance and stability, but also cause damage to system components and compressors. Refrigeration experts have many years of practical experience to teach you how to identify inferior refrigerants:

  First, "price resolution"

  Refrigerants, whether through the formal channels to purchase refrigerants produced by regular manufacturers, such as refrigerants whose prices are significantly lower than the market price, should be highly vigilant.

  Second, "device testing"

  If you have test conditions, it is recommended to check the purity and acidity of the refrigerant before using it. It is not recommended for refrigerants whose test results are significantly lower than the industry standard. Note: The purity of qualified R22 refrigerant should be greater than 99% (high-quality refrigerant purity is greater than 99.8%), and acidity (in terms of HCL) should be less than 0.0001.

  Third, "simple check"

  If you do not have refrigerant detection conditions, it is recommended to perform a simple check before using the refrigerant. The simple check method can be: [1] Invert the refrigerant tank and release a small amount of refrigerant onto a piece of white paper. There are obvious impurities or liquid water on the white paper, indicating that the refrigerant quality is not good, it is not recommended; [2] Connect the pressure gauge to test the refrigerant bottle pressure, compare the refrigerant temperature and pressure characteristics table, check whether the pressure inside the bottle is normal. Range of values, such as significant pressure anomalies, is not recommended. And when the refrigerant is used halfway, the pressure inside the bottle can be tested again. For the single component refrigerant of R22, the pressure of the two measuring bottles should be very close, but for the inferior refrigerant, usually mixed with various components, the bottle After the use of the internal refrigerant, the bottle pressure will usually vary greatly due to the change of the composition ratio. If such a phenomenon occurs, it is recommended to immediately deactivate the refrigerant and discharge the refrigerant that has been charged into the system to avoid Pollution system.

  Fourth, "system debugging"

  In the system commissioning operation phase, if the following anomalies are found: [1] the system cooling capacity is obviously insufficient and the refrigerant is not concerned about other refrigerants; [2] the system dryer filter or expansion valve is blocked and blocked. When the material is yellow-brown waxy or black sludge-like foreign matter, attention should be paid to the refrigerant; [3] high and low pressure or temperature abnormality occurs during system operation, or the system equilibrium pressure is abnormal when the machine is stopped (can refer to the refrigerant temperature and pressure characteristics table) ), pay attention to the refrigerant. When these anomalies occur, it is recommended to extract refrigerant from the system for purity testing to check for the risk of inferior refrigerants. During this time, it is recommended to vent the compressor side refrigerant or to release the system-wide refrigerant to avoid potentially inferior refrigerant contact with the compressor and damage the compressor.

  Once a unit component or compressor failure is discovered due to chemical contamination caused by inferior refrigerants, the unit that used the same source of refrigerant at that site (even if the unit is still functioning properly) will need to be replaced with refrigerant. Because the effects of hazardous chemicals in inferior refrigerants are sometimes slow, they can cause system failure after a long period of use.