Multi-system air-conditioning machine in which outdoor unit is c

Details Multi-system air-conditioning machine in which outdoor unit is c Multi-system air-conditioning machine in which outdoor unit is c

1991-10-25

1992-11-10

Wayner, William E.

Refrigeration

Automatic control

Diverse, cascade or compound refrigeration-producing system

62204, 62217, F25B 700

Patent

active

051613883

ABSTRACT:
Electric expansion valves are provided midway along liquid-side pipes connected to indoor units. Electric flow control valves are provided midway along gas-side pipes connected to the indoor units. The indoor units detect air-conditioning loads, and a capability of a compressor is controlled in accordance with the sum of the air-conditioning loads. At the same time, the opening degrees of the flow control valves are controlled in accordance with the individual air-conditioning loads of the indoor units. In the heating operation mode, a high-pressure-side pressure of a refrigeration cycle is detected. When the high-pressure-side pressure becomes a preset value or more, an expansion valve and a flow control valve corresponding to an indoor unit whose operation is stopped are opened to predetermined opening degrees.

REFERENCES:
patent: 4720982 (1988-01-01), Shimizu et al.
patent: 4771610 (1988-09-01), Nakashima et al.
patent: 4926653 (1990-05-01), Masuda et al.

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