Control apparatus for multi-air-conditioner system

Details Control apparatus for multi-air-conditioner system Control apparatus for multi-air-conditioner system

1989-05-31

1990-06-12

Wayner, William E.

Refrigeration

Processes

Lubricant handling

62192, 62231, F25B 4302

Patent

active

049322150

ABSTRACT:
A control apparatus for a multi-air-conditioner system provided with a freezing cycle wherein refrigerant is supplied from a common outdoor unit to a plurality of indoor units via respective control valves. In order for a compressor to recover refrigerant and oil contained therein remaining in an indoor unit under interception, the control valve of the indoor unit under interception is opened cyclically to a degree of opening corresponding to the rated capacity of the indoor unit for the predetermined time while circulating the refrigerant cyclically for a predetermined time to the indoor unit.

REFERENCES:
patent: 4697431 (1987-10-01), Alsenz

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