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Current controlling apparatus and method for air conditioning apparatus

  • US 5,209,075 A
  • Filed: 11/15/1991
  • Issued: 05/11/1993
  • Est. Priority Date: 11/20/1990
  • Status: Expired due to Term
First Claim
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1. A current control apparatus for use in an air conditioning apparatus separated into an indoor device and an outdoor device and providing a heating operation and a cooling operation, said current control apparatus comprising:

  • rectifying means for rectifying alternating current power to pulsating direct current power;

    inverter means for converting the pulsating direct current power output of the rectifying portion into three phase alternating current power, said inverter means comprising plural transistors;

    base drive means for supplying a control signal to bases of the transistors;

    total current detection means for detecting current by a current transformer mounted between a source of the alternating power and the rectifying means and outputting the detected total current value;

    peak current detection means for detecting peak current flowing in a shunt resistor mounted between the rectifying means and the inverter means and outputting the detected peak current value;

    temperature sensing means for sensing at least indoor and outdoor temperature, indoor and outdoor piping temperature and compressor discharging gas temperature and outputting the above sensed data;

    microprocessor means for outputting a control signal to the base drive means which is obtained by processing the temperature data received from the temperature sensing means and the current data received from the total current detection means and the peak current detection means, said microprocessor means comprising an indoor microprocessor and an outdoor microprocessor; and

    interface means for connecting the outdoor microprocessor and the indoor microprocessor.

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