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Supermarket refrigerated showcase Alternative methods between refrigerants
Supermarket refrigerated showcase Alternative methods between refrigerants
At present, there are household supermarket refrigerated showcases in the society. The main refrigerants used are R12, mixed refrigerants, R134a and R600a, etc. The main characteristic parameters of the four refrigerants are quite different, and the requirements for the refrigeration system are also different.
In principle, supermarket refrigerated showcase can only be filled with the same refrigerant as the original model. However, due to conditions, some places cannot buy R600a or R134a refrigerants. Supermarket refrigerated showcase can only be replaced with R12 refrigerants if there are problems. In accordance with the requirements of local environmental protection departments, R12 refrigerants will be banned in the future. When using fluorine-free refrigerant instead. Therefore, this article mainly introduces the methods and techniques of replacing refrigerants and modifying the system.
Differences between fluorine and non-fluorine systems
supermarket refrigerated showcase Recognition of the use of refrigerants Due to the large differences in the characteristics of R12, mixed refrigerants, R134a, R600a and other refrigerants, the design of the corresponding refrigeration systems is also different . If you do not pay attention to the distinction during maintenance, the lighter ones may cause the performance of the system to decline, and the more serious ones will cause the compressor to return poorly, capillary clogging and other failures, which will seriously affect the use and life of the supermarket refrigerated showcase. Therefore, the refrigerant category should be distinguished before starting maintenance.
①Check the refrigerant and charge amount column on the back nameplate of the supermarket refrigerated showcase, generally marked with the refrigerant type and charge amount, this is the main basis for identifying the refrigerant type used in the supermarket refrigerated showcase;
②check the compressor housing The nameplate is generally marked with the refrigerant model and rated value. For example, R600a compressors are marked with R600a and yellow flame flammable signs;
③Check the supermarket refrigerated showcase model and identify it according to the instructions provided by Gongguang. If you add HC, it generally represents use R600a refrigerant.
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