Refrigeration – Automatic control – Of external fluid or means
Patent
1980-12-31
1983-01-04
Wayner, William E.
Refrigeration
Automatic control
Of external fluid or means
236 75, 251129, 307252B, F25D 1704, G05D 1500
Patent
active
043666787
ABSTRACT:
A temperature control apparatus for use in a refrigerating machine, wherein an a.c. control element and the solenoid coil of a holding type solenoid are connected in series in an a.c. power circuit, the holding type solenoid serving to actuate a damper for opening and closing the outlet for ejecting cooled air into the refrigerating chamber, and also a temperature sensor for detecting the temperature in the refrigerating chamber and a triggering circuit for triggering the a.c. control element are provided in the a.c. power circuit. The triggering circuit supplies a trigger signal to the control electrode of the a.c. control element at a predetermined period in synchronism with the phase of the current from the a.c. power source in response to the output of the temperature sensor, so that the solenoid coil is energized to drive the damper.
REFERENCES:
patent: 3893307 (1975-07-01), Jacobs
patent: 4158164 (1979-06-01), Nutz
patent: 4265394 (1981-05-01), Nagel
Fujimoto Ryoichi
Nagoya Yosinari
Nozaki Koichi
Shirakata Terukazu
Yamaguchi Kazuyoshi
Hitachi , Ltd.
Wayner William E.
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