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Air conditioner

  • US 20030097853A1
  • Filed: 11/26/2002
  • Published: 05/29/2003
  • Est. Priority Date: 11/27/2001
  • Status: Active Grant
First Claim
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1. An air conditioner for air conditioning the Interior of a compartment, comprising:

  • a variable displacement compressor, wherein the compressor compresses refrigerant gas and changes the displacement;

    an electric motor for driving the compressor;

    a motor controller for rotating the motor at a constant reference speed;

    a detection device for detecting information related to the thermal load on the air conditioner;

    a current sensor for detecting the value of current supplied to the electric motor; and

    a controller for controlling the compressor based on the detected thermal load information and the detected current value, wherein the controller;

    computes a target torque of the compressor based on the thermal load information;

    computes a target currant value to be supplied to the electric motor in accordance with the computed target torque; and

    controls the displacement of the compressor such that the detected current value matches the target currant value.

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