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Controlling air temperatures of HVAC units

  • US 9,822,989 B2
  • Filed: 12/07/2012
  • Issued: 11/21/2017
  • Est. Priority Date: 12/12/2011
  • Status: Active Grant
First Claim
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1. A method for controlling an environmental maintenance system having a plurality of environmental maintenance units and at least one Temperature Set Point Reset (TSPR) system, the method comprising:

  • receiving, at a first TSPR system from a first environmental maintenance unit of the plurality of environmental maintenance units, a first measure of an operational parameter of the first environmental maintenance unit, wherein the first environmental maintenance unit is configured to;

    compute a first temperature difference between an air temperature and a first temperature setpoint;

    use the first temperature difference to determine an operational level for controlling of a particular actuator of the first environmental maintenance unit, wherein the operational level is an input command to change the operational parameter of the particular actuator, andsend the determined operational level for the operational parameter as the first measure for the operational parameter to the first TSPR system;

    comparing, at the first TSPR system, the first measure of the operational parameter to a first operational setpoint of the first environmental maintenance unit to obtain a first operational difference;

    determining, with a processor of the first TSPR system, a first adjustment of the first temperature setpoint of the first environmental maintenance unit based on the first operational difference; and

    sending the first adjustment to the first environmental maintenance unit, thereby controlling the first environmental maintenance unit based on the first adjustment.

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