Refrigeration – Automatic control – Selective heating or cooling
Patent
1991-04-18
1992-10-20
Wayner, William E.
Refrigeration
Automatic control
Selective heating or cooling
F25B 1300
Patent
active
051560143
ABSTRACT:
An air conditioning apparatus comprising: a single heat source device including a compressor, a reversing valve, an outdoor heat exchanger and an accumulator; a plurality of indoor units including indoor heat exchangers and first flow controllers; a first main pipe and a second main pipe for connecting between the heat source device and the indoor units; a first branch joint which can selectively connect one end of the indoor heat exchanger of each indor unit to either one of the first main pipe and the second main pipe; a second branch joint which is connected to the other end of the indoor heat exchanger of each indoor unit through the first flow controllers, and which is also connected to the second main pipe through a second flow controller; the first branch joint and the second branch joint being connected together through the second flow controller; the second branch joint being connected to the first main pipe through a fourth flow controller; a junction device which includes the first branch joint, the second flow controller, the fourth flow controller and the second branch joint, and which is interposed between the heat source device and the indoor units; and the first main pipe having a greater diameter than the second main pipe; and a switching valve arrangement which can be arranged between the first main pipe and the second main pipe in the heat source device to switch the first main pipe and the second main pipe to a low pressure side and to a high pressure side, respectively.
REFERENCES:
patent: 4760707 (1988-08-01), Dennis et al.
patent: 5040376 (1991-08-01), Ueno
patent: 5063752 (1991-11-01), Nakamura et al.
patent: 5065588 (1991-11-01), Nakayama et al.
Kasai Tomohiko
Nakamura Takashi
Takata Shigeo
Tani Hidekazu
Mitsubishi Denki & Kabushiki Kaisha
Wayner William E.
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