Refrigeration – Automatic control – Refrigeration producer
Patent
1987-02-17
1988-04-19
Wayner, William E.
Refrigeration
Automatic control
Refrigeration producer
417 45, F25B 100
Patent
active
047381183
ABSTRACT:
An air conditioner having a heat exchange cycle which includes at least a compressor motor that is driven by an inverting apparatus at a variable speed, an indoor heat exchanger and an outdoor heat exchanger is provided. This air conditioner comprises a memory for storing a plurality of voltage to frequency ratio pattern data that is predetermined in accordance with different load states of the compressor motor for control of the inverting apparatus, a load state detector which is coupled at a predetermined position in the air conditioner and detects a variation in load of the compressor motor with respect to a plurality of predetermined states, a selector which receives the result of detection by the load state detector and supplies a pattern selection signal to selectively read out a voltage to frequency ratio pattern data corresponding to this detection result to the memory, and a controller which receives the voltage to frequency ratio pattern data read out selectively from the memory in response to the pattern selection signal and supplies a predetermined control output corresponding to the load variation to the inverting apparatus.
REFERENCES:
patent: 4259845 (1981-04-01), Norbeck
patent: 4407139 (1983-10-01), Ide et al.
patent: 4417193 (1983-11-01), Hirata
patent: 4488100 (1984-12-01), Fudii et al.
Kabushiki Kaisha Toshiba
Wayner William E.
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