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MULTIPLE ZONE CONTROL SYSTEM WITH PRIORITY OF SERVICE

  • US 3,724,534 A
  • Filed: 11/26/1971
  • Issued: 04/03/1973
  • Est. Priority Date: 11/26/1971
  • Status: Expired due to Term
First Claim
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1. A multiple zone temperature control system having a priority of service capability comprising:

  • heating and cooling means connected to supply heating and cooling to a plurality of zones;

    a plurality of temperature measuring means, one in each zone, a scanning means having a plurality of inputs connected to said temperature measuring means operable to sequentially pass signals therefrom indicative of whether each temperature measuring means is calling for heating or cooling, the particular temperature measuring means located in priority areas being connected to more than one of said plurality of inputs;

    summing means connected to said scanning means operable to produce an output signal indicative of the algebraic sum of the number of inputs connected to temperature measuring means calling for one of the states of heating or cooling; and

    control means connected to said summing means and said heating and cooling means operable to vary the heating and cooling means in response to the sum from said summing means.

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