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Electric power supply apparatus of air condition control machine

  • US 5,390,506 A
  • Filed: 07/30/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 12/09/1991
  • Status: Expired due to Term
First Claim
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1. In an air conditioning control machine in which a plurality of air conditioning control units are connected to a single controller through wirings and air conditioning operation is controlled by sending and receiving a control signal between the controller and the air conditioning control unit, an electric power supply apparatus of the air conditioning control machine including said air conditioning control units comprising:

  • number memory means for previously storing different specific numbers in each air conditioning control unit;

    power supply means for supplying electric power;

    power supply judging means for detecting whether another air conditioning control unit is supplying electric power to the controller by monitoring the wirings;

    power control means for determining to not supply electric power to the controller when the power supply judging means detects that the controller receives power;

    timing means for setting a power supply time based on the specific number; and

    power supply determining means for determining to supply electric power to the controller when the power supply judging means detects that the controller receives no power at the power supply time and for controlling the power supply means to supply power to the controller.

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