Refrigerant recovery device

Abstract

A refrigerant recovery device comprises a compressor 1 which draws in chlorofluorocarbons gas. Chlorofluorocarbons gas that has increased pressure and temperature by being discharged from the compressor 1 is conducted through a heat exchange device 2 to become liquid refrigerant. The liquid refrigerant is conducted by a liquid pipe 13 to a refrigerant recovery tank 7. Gas of the refrigerant inside the refrigerant recovery tank 7 is conducted to the compressor 1 by a gas pipe 21. The heat exchange device 2 comprises the first helical piping 3 formed by winding a small diameter heat transfer pipe, a large diameter tube 5 with a cross-sectional area larger than the previous heat transfer pipe and the second helical, small-diameter piping 4 with a structure similar to the first helical small-diameter piping 3, these elements being connected in serial as a single unit, or alternatively the heat exchange device comprises two or more single units connected together. The liquid pipe 13 comprises a solenoid valve 6 that is controlled by a pressure sensor 14 to open at a preset upper value and to close at a preset lower value. The gas pipe 12 comprises a solenoid valve 22 that is controlled by a pressure sensor 24 to open at a preset upper value and to close at a preset lower value. The present invention provides a refrigerant recovery device that is cheap, compact and is portable and easy to operate for inexpensively recovering chlorofluorocarbons.

Description

technical field [0001] The present invention relates to a refrigerant recovery device for economically and effectively recovering Freon gas, which is a main component of refrigerant used in air compressors for automobiles, houses, etc., and other equipment. Background technique [0002] It is well known that if Freon gas is released into the atmosphere, it will have a bad impact on the earth's environment. Therefore, taking the case of discarded automobiles as an example, in order to reuse Flon gas without releasing it into the atmosphere, it is common to recover Flon gas from the refrigerant line. In the past, in order to recover Freon gas, it was extracted from the recovered refrigerant system and sent in liquid form to recovery containers such as high-pressure gas cylinders. At this time, compressors and condensers are indispensable components in the recovery device. [0003] As mentioned above, the conventional recovery device must have a large-scale heat exchanger—a cr...

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Problems solved by technology

[0003] As mentioned above, the conventional recovery device must have a large-scale heat exchanger—a cross-fin-shaped condenser, so it becomes a large-scale equipment. In addition, because the operation cost is also high, the recovery cost of Freon gas increases. becomes a difficulty

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