CONTROLLING AIR TEMPERATURES OF HVAC UNITS
First Claim
1. A method for controlling an environmental maintenance system having a plurality of environmental maintenance units, the method comprising:
- receiving a first measure of an operational parameter of a first environmental maintenance unit of the plurality of environmental maintenance units, wherein the first environmental maintenance unit is configured to;
compute a first temperature difference between an air temperature and a first temperature setpoint; and
use the first temperature difference to determine an operational level for the operational parameter for the first environmental maintenance unit;
comparing the first measure to a first operational setpoint to obtain a first operational difference;
determining, with a processor, a first adjustment of the first temperature setpoint based on the first operational difference; and
sending the first adjustment to the first environmental maintenance unit.
1 Assignment
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Accused Products
Abstract
Systems and methods of stabilizing HVAC systems with multiple HVAC units configured to control return air temperature or discharge air temperature are provided. HVAC units that are controlled by the return air temperature compare the return air temperature to a setpoint that determines whether the HVAC unit'"'"'s operation increases, decreases, or stays the same. By adjusting the setpoint of an HVAC unit based on certain criteria (e.g., a desired operational effort of an HVAC unit) the system can be stabilized. A temperature setpoint reset (TSPR) system can be included in each HVAC unit that resets the temperature setpoint (TSP) of the HVAC unit so that the HVAC unit operates within a desired operational effort (e.g. compressor speed or valve position). A master feedback loop and optimizer loop may be implemented to further control the behavior of the HVAC system.
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Citations
21 Claims
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1. A method for controlling an environmental maintenance system having a plurality of environmental maintenance units, the method comprising:
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receiving a first measure of an operational parameter of a first environmental maintenance unit of the plurality of environmental maintenance units, wherein the first environmental maintenance unit is configured to; compute a first temperature difference between an air temperature and a first temperature setpoint; and use the first temperature difference to determine an operational level for the operational parameter for the first environmental maintenance unit; comparing the first measure to a first operational setpoint to obtain a first operational difference; determining, with a processor, a first adjustment of the first temperature setpoint based on the first operational difference; and sending the first adjustment to the first environmental maintenance unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer product comprising a non-transitory computer readable medium storing a plurality of instructions that when executed control a computer system to control an environmental maintenance system having a plurality of environmental maintenance units, the instructions comprising:
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receiving a first measure of an operational parameter of a first environmental maintenance unit of the plurality of environmental maintenance units, wherein the first environmental maintenance unit is configured to; determine a first temperature difference between the air temperature and a first temperature setpoint; and use the first temperature difference to determine an operational level for the operational parameter for the first environmental maintenance unit; comparing the first measure to a first operational setpoint to obtain a first operational difference; determining a first adjustment of the first temperature setpoint based on the first operational difference; and sending the first adjustment to the first environmental maintenance unit.
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15. A system for controlling an environmental maintenance system having a plurality of environmental maintenance units, the system comprising:
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a first input for receiving an operational effort of a first environmental maintenance unit; a second input for receiving an operational effort setpoint; control circuitry coupled with the first and second inputs, the control circuitry configured to calculate; a change value using a difference between the operational effort and the operational effort setpoint; and determine a temperature setpoint adjustment by adding the change value and a temperature value; an output for sending a temperature setpoint adjustment to the first environmental maintenance unit. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification