Multi-room type air conditioner

Details Multi-room type air conditioner Multi-room type air conditioner

1984-12-17

1987-02-24

Tanner, Harry

Refrigeration

Automatic control

Selective heating or cooling

62200, 62225, F25B 1300

Patent

active

046447563

ABSTRACT:
A multi-room type air-conditioner includes an outdoor unit and a plurality of indoor units connected thereto and is capable of providing cooling and hearing by change-over of a 4-way valve. A plurality of motorized valves are provided on each liquid line of the outdoor unit, respectively in order to control superheat of low pressure gaseous refrigerant at the use-side heat exchanger outlet of each indoor unit in cooling and also to control sub-cool of high pressure liquid refrigerant at the heat exchanger outlet in heating. The motorized valve is completely closed in cooling mode for the non-operating indoor unit and the motorized valve for the non-operating indoor unit is controlled in the heating mode to have a small opening so that no liquid refrigerant accumulation takes place in the non-operating indoor unit.

REFERENCES:
patent: 4307576 (1981-12-01), Takano et al.
patent: 4375753 (1983-03-01), Imasu et al.
patent: 4393662 (1983-07-01), Dirth
patent: 4510767 (1985-04-01), Komatsu et al.

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