Wendell C Olsen

US Patent:

57201846, Feb 24, 1998

Filed:

Jan 17, 1995

Appl. No.:

8/373372

Inventors:

Wendell C. Olsen - Canby OR

Assignee:

Endeavor Enterprises, Inc. - Canby OR

International Classification:

F25B 4500

US Classification:

62292

Abstract:

A machine and co-operating apparatus with method to variably adjust delivery pressure reducing apparatus to complement removal of the different types of refrigerant from disabled refrigeration units in liquid or vapor form. Recovery tank, and system are vacumn evacuated by recovery system condensing unit before recovery is started by freeze chilling recovery tank removably enclosed within separate refrigerant supplied refrigeration unit evaporator cabinet to establish wide temperature difference between disabled refrigeration unit, and recovery tank utilizing co-operating pressure reducing apparatus to enable cool low pressure flow of liquid refrigerant to said tank. Same apparatus allows disabled refrigeration unit's supply pressure of refrigerant to remain stabilized throughout recovery procedure. Said pressure maintenance prevents freezing of water cooled condensers and chiller evaporators. Same pressure reducing apparatus control of supply pressure liquid refrigerant enables vaporized cooling with re-liquification upon entry to refrigerant conduit, and apparatus supplying refrigerant to recovery tank, Machine and co-operating apparatus further configured to access refrigerant vapor from same supply pressure controlling apparatus to supply machine's recovery system condenser unit that condenses vapor to a liquid.