Refrigeration – Automatic control – Refrigeration producer
Patent
1999-01-21
2000-04-25
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
622284, 318803, F25B 4902
Patent
active
060530022
ABSTRACT:
There is provided a controlling apparatus for an air conditioner, which comprises: an inverter circuit for feeding as an output a pseudo-sine wave from a switching signal obtained by comparison between a modulated wave and a carrier wave; a refrigeration cycle device which has a compressor driven by the pseudo-sine wave from the inverter circuit so that the modulated wave is adjusted according to a load of an air conditioner; and a correction device for correcting an amplitude of the modulated wave into a smaller one at a predetermined time when a rated voltage of the power source from the inverter circuit is larger than a rated voltage by a first predetermined value, and correcting the modulated wave into a larger one at a predetermined time when a rated voltage of the power source from the inverter circuit is smaller than the rated voltage by a second predetermined value. The predetermined time is elongated as the difference between the aforementioned power source voltage and the rated voltage becomes larger, so that shutdown of the compressor is restricted at the voltage variation of the power source.
REFERENCES:
patent: 5199274 (1993-04-01), Yoshida et al.
patent: 5209075 (1993-05-01), Kim
patent: 5493868 (1996-02-01), Kikuiri et al.
patent: 5560218 (1996-10-01), Jang
Ishihara Manabu
Isobe Tomonori
Kawabe Eiji
Matsumoto Kouichi
Matsumoto Satoshi
Sanyo Electric Co,. Ltd.
Tanner Harry B.
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