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The difference of display cooler refrigeration system
author: supermarket refrigerated showcase category: walk-in display coolers Views: 519Time: 2016-08-22
The difference of display cooler refrigeration system
①Compressor comparison R12 and R600a compressors both use mineral oil, but the R600a display cooler compressor cylinder is about 70% larger than the R12 compressor cylinder. In addition to using vinegar oil, R134a has higher performance than R12 compressor in other aspects.
② Dry filter comparison R600a must use HX-9 dry filter, R134a must use HX-7 or HX-9 dry filter, and R12 uses ordinary HX-5 dry filter. In addition to the different drying capacity, the three models have different molecular sieve diameters.
③Compared with the capillary of the R600a system, the capillary of the R600a system is slightly shorter than that of the R12 system, and the capillary of the R134a system is slightly longer than that of the R12 system.
④ Comparison of evaporator condenser system R600a, R134a and R12 system are basically the same.
⑤The amount of refrigerant R600a is about 30%-40% of R12, and R134a is 10%-15% higher than R12.
electrical system differences R134a and R12 electrical system are basically the same, R600a electrical system uses explosion-proof type, overload protector is built-in (closed), must use PTC starter to prevent sparks. Because in the event of a leak in the weld near the compressor, it is very likely that the surrounding air will reach an explosive concentration above. And the starter and thermostat should have explosion-proof function, that is, there is a yellow flame warning sign d on the nameplate. The replacement of display cooler refrigerants has different requirements on the system due to different refrigerants. Since various refrigerants are easily available at present, it is best to use the original refrigerant. But for remote areas, it is sometimes difficult to purchase the same type of refrigerant. LR12 refrigerant and mixed refrigerant can be substituted for each other, and other refrigerants cannot be substituted for each other in principle.
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