Method of returning refrigerator oil of air conditioner

Details Method of returning refrigerator oil of air conditioner Method of returning refrigerator oil of air conditioner

1997-11-21

1999-10-19

Sollecito, John M.

Refrigeration

Processes

Lubricant handling

62192, 62468, F25B 4302

Patent

active

059669470

ABSTRACT:
An air conditioner has an outdoor unit and a plurality of room units supplied with a refrigerant from the outdoor unit. The outdoor unit and the room units are connected by a plurality of refrigerant pipes. In a recovery operation for returning refrigerator oil from the room units, the refrigerant pipes and the like to the outdoor unit, the plurality of room units are divided into a plurality of room unit groups, and the recovery operation of the refrigerant is carried out for each of the room unit groups.

REFERENCES:
patent: 5361595 (1994-11-01), Shimura et al.

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