Air-conditioning apparatus having heat source unit and plural in

Details Air-conditioning apparatus having heat source unit and plural in Air-conditioning apparatus having heat source unit and plural in

1993-01-14

1993-12-28

Wayner, William E.

Refrigeration

Automatic control

Of external fluid or means

62197, 62505, F25B 3100

Patent

active

052728854

ABSTRACT:
There is provided an air-conditioning apparatus. A cooling bypass extends from a pipe portion between a water heat exchanger and indoor heat exchangers of a refrigerating cycle to a low-pressure-side pipe portion of the refrigerating cycle. The cooling bypass is provided with a flow control valve. A discharged-refrigerant temperature Td and sucked-refrigerant temperature Ts of a compressor are sensed, and the opening degree of the flow control valve is zone-controlled in accordance with temperature Td or temperature Ts. When the sucked-refrigerant temperature Ts exceeds a predetermined value despite the zone-control, the opening degree of the flow control valve is controlled and increased. By this control, the amount of refrigerant flowing through the cooling bypass increases, and the refrigerant cooling effect on the low pressure side is enhanced.

REFERENCES:
patent: 4878355 (1989-11-01), Beckey et al.
patent: 5052189 (1991-10-01), Aklike

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