Refrigeration – Processes – Lubricant handling
Patent
1996-06-24
1998-04-14
Sollecito, John M.
Refrigeration
Processes
Lubricant handling
62 85, 62303, F25B 4302
Patent
active
057379297
ABSTRACT:
Method and apparatus are disclosed for separting a refrigerant from oil and/or impurities contained in components of a compressor cooling system. When retrofitting a compressor cooling system using a CFC refrigerant into use of a chloride HFC refrigerant, the mineral oil mixed into the CFC refrigerant has to be seperated. It is thereby a problem that the oil is spread in all the components of the system and that existing cleansing technique is not efficient, since it does not cleanse all the components as the technique used involves that some of the components are by-passed. According to the invention these problems are solved by temporarily connecting an oil removal device in series with the compressor cooling system without having to by-pass any components. The compressor cooling system is filled with refrigerant, e.g. R134a. When starting the system the oil and/or impurities are carried with the refrigerant, as during normal service, but is separated from the system when the refrigerant, oil and/or the impurities reach the separation tank (3) of the device. The oil and/or impurities are thereby accumulated in the oil tank (12) of the device. The oil tank (12) may be heated in order to ensure that the refrigerant will not condense and be collected in the oil tank (12). The oil removal device may be connected into several systems for cleaning cycles before removing accumulated oil from the oil separation device of this invention. Thus, an inspection glass 10 permits visual checking of the oil level.
REFERENCES:
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patent: 3777509 (1973-12-01), Muench
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patent: 5231843 (1993-08-01), Keltner
patent: 5247812 (1993-09-01), Keltner
Henriksson Morgan
Siosteen Arvo
Brown Laurence R.
Cool Engineering
Sollecito John M.
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