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Controller for air conditioning or heating system

  • US 4,433,809 A
  • Filed: 09/11/1981
  • Issued: 02/28/1984
  • Est. Priority Date: 03/12/1980
  • Status: Expired due to Fees
First Claim
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1. A control for heating an air conditioning and/or heating system in a region, comprising in combination:

  • first means for establishing electrical signals corresponding to an upper and lower temperature of a first temperature range;

    second means for establishing electrical signals corresponding to an upper and lower temperature of a second temperature range;

    timer means for providing periodic outputs during a given operating cycle;

    third means for providing a presence signal upon detecting a person inhabiting the region;

    means connecting said timer means to said third means for actuating said third means at a selected one of said periodic outputs of a given operating cycle of said timer means;

    said third means providing said presence signal for the remainder of said operating cycle upon detecting a person inhabiting the region; and

    fourth means connected to said first, second and third means for controlling the system in accordance with said first temperature range upon a presence signal from said third means and for controlling the system in accordance with said second temperature range upon a lack of a presence signal from said third means.

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