Continuous fan control in a multi-zone HVAC system
First Claim
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1. An HVAC system comprising:
- a temperature changing component;
a first duct system which communicates airflow between said temperature changing component and a first zone, said first duct system defining a first volume;
a second duct system which communicates airflow between said temperature changing component and a second zone, said second duct system defining a second volume; and
a system control which independently controls a system airflow to deliver a first continuous zone airflow to said first zone and a second continuous zone airflow to said second zone in response to a relative volume difference between said first volume and said second volume.
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Abstract
A multi-zoned HVAC system includes a control for independently determining the amount of airflow delivered to each zone within the HVAC system. The control determines nominal zone airflow and continuous fan airflow levels for each zone based upon a user selected fan airflow level and the relative size of each zone in the HVAC system. The control determines the desired system airflow for the entire system once the continuous fan airflow levels for each zone are determined. The HVAC system provides a continuous fan airflow to each zone independently of the continuous fan airflow delivered to any other zone and irrespective of the relative size difference of the zones.
60 Citations
26 Claims
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1. An HVAC system comprising:
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a temperature changing component; a first duct system which communicates airflow between said temperature changing component and a first zone, said first duct system defining a first volume; a second duct system which communicates airflow between said temperature changing component and a second zone, said second duct system defining a second volume; and a system control which independently controls a system airflow to deliver a first continuous zone airflow to said first zone and a second continuous zone airflow to said second zone in response to a relative volume difference between said first volume and said second volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a continuous zone airflow to a multiple of zones comprising the steps of:
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(1) determining a system airflow; and (2) determining a first zone airflow to a first zone and a second zone airflow to a second zone from the system airflow in response to a relative volume difference between the first zone and the second zone. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of supplying a continuous zone airflow to a multiple of zones comprising the steps of:
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(1) determining a first zone airflow for a first zone and a second zone airflow for a second zone in response to a relative volume difference between a first volume of the first zone and a second volume of the second zone; and (2) supplying a first continuous zone airflow for the first zone and a second continuous zone airflow for the second zone by adjusting the first zone airflow for the first zone by a first proportionality constant and the second zone airflow for the second zone by a second proportionality constant. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method of supplying a continuous zone airflow to a multiple of zones comprising the steps of:
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(1) determining a nominal system airflow; (2) determining a relative size of a first zone and a second zone; (3) calculating a nominal zone airflow in response to the nominal system airflow and the relative zone size of the first zone and the second zone; (4) delivering the continuous zone airflow of the first zone independently of the continuous zone airflow of the second zone in response to the nominal zone airflow and a user selected fan airflow level selected for each of the first zone and the second zone. - View Dependent Claims (24, 25, 26)
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Specification