Refrigerant purifying device and purifying method

Abstract

The invention discloses a refrigerant purifying device and a refrigerant purifying method. The method comprises the following steps: exhausting air or other gases in a container; placing a recycled refrigerant in the container; standing the container in a constant-temperature environment; if a pressure value of the container is greater than a theoretical pressure value of the refrigerant under the ambient temperature, indicating that the refrigerant is mixed with the air; opening an exhaust valve, releasing part gas in the container, and closing the exhaust valve when the detected container pressure is equal to the theoretical pressure value; vaporizing the refrigerant in the container, separating the vaporized refrigerant from various impurities, drying, and filtering; during a vaporizing process, when the detected pressure value in the container is lower than the theoretical pressure value, indicating that the volatilizing of the refrigerant is completed; opening a blow-down valve to discharge the various of impurities. The invention also provides the refrigerant purifying device. Through the refrigerant purifying device and the refrigerant purifying method, on one hand, the recovery rate of the refrigerant can be improved; on the other hand, the impurities can be removed thoroughly, and the refrigerant cannot be lost, so that materials are saved, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to refrigerant recycling technology, in particular to a refrigerant purification device and purification method. Background technique [0002] When the refrigeration unit is scrapped, maintained or has an accident, it is often necessary to recover the refrigerant. However, the recovered refrigerant will bring the following problems: [0003] 1. The recovered refrigerant usually contains grease or other liquids, which affects heat transfer and makes the heat conversion efficiency low; [0004] 2. The recovered refrigerant usually contains mechanical impurities, which can block the expansion valve, unit filter, or even damage the compressor; [0005] 3. The recovered refrigerant usually contains moisture, which may cause ice blockage, or block the expansion valve, unit filter, etc., or even [0006] Refrigerant reacts to produce acidic substances and corrodes the unit; [0007] 4. The recovered refrigerant usually contains air, ...

AI Technical Summary

Problems solved by technology

[0003] 1. The recovered refrigerant usually contains grease or other liquids, which affects heat transfer and makes the heat conversion efficiency low;

[0004] 2. The recovered refrigerant usually contains mechanical impurities, which can block the expansion valve, unit filter, or even damage the compressor;

[0005] 3. The recovered refrigerant usually contains moisture, which may cause ice blockage, or block the expansion valve, unit filter, etc., or even

[0006] Refrigerant reacts to produce acidic substances and corrodes the unit;

[0007] 4. The recovered refrigerant usually contains air, which will cause the evaporator and condenser to fail to work normally and reduce efficiency, and even

[0008] Unit overpressure leads to other accidents

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