Method for changing lubricant types in refrigeration or air cond

Details Method for changing lubricant types in refrigeration or air cond Method for changing lubricant types in refrigeration or air cond

1996-07-23

1997-10-21

Sollecito, John M.

Refrigeration

Processes

Lubricant handling

62303, F25B 4302

Patent

active

056784120

ABSTRACT:
The present invention includes a method for changing lubricant types in closed cooling systems such as refrigeration, air-conditioning machinery, and the like. The present invention is also applicable to heat pumps. The method of the present invention may be used on such systems that comprise one or more compressors, one or more evaporators, and one or more condensers. The method of the present invention allows the original compressor lubricant to be drained and replaced with a new lubricant; typically a lubricant of a different type than the original lubricant. Through use of the method of the present invention, all accessible points in the system (i.e., the compressor, the high side oil separator, if so equipped, and the accumulator, if so equipped, etc.) may be drained of the original lubricant and recharged with a new lubricant. After this is done, the original lubricant may still remain in the evaporator, condenser, and/or associated fluid lines.

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