Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1984-06-11
1985-12-10
Tanner, Harry
Refrigeration
With indicator or tester
Operatively correlated with automatic control
62230, 361 22, F25B 4900
Patent
active
045571147
ABSTRACT:
In an air conditioner separated into an indoor unit and an outdoor unit, a control circuit comprises a three-phase power source connected in common to the indoor and outdoor units, and a signal line led out from two phases of the power source. A contact of an electromagnetic relay energizing a compressor of the air conditioner is connected on the portion of the signal line in the indoor unit in series with a current sensor sensing the current flowing through the signal line, and a contact of a protective relay protecting the compressor is connected on the portion of the signal line in the outdoor unit in series with the electromagnetic relay. A first controller is disposed in the indoor unit for controlling on-off of the relay contact of the electromagnetic relay, and a second controller is disposed in the outdoor unit for energizing the protective relay contact thereby controlling on-off of the compressor.
REFERENCES:
patent: 4307775 (1981-12-01), Saunders et al.
patent: 4449375 (1984-05-01), Briccetti
patent: 4463571 (1984-08-01), Wiggs
Kato Takashi
Sato Keiji
Yoshikawa Tomio
Yoshioka Kazuo
Hitachi , Ltd.
Tanner Harry
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