Environmental control system
AssigneeCarrier Corporation
InventorsJunqiang Fan, Futao Zhao, Stevo Mijanovic, Rajendra K. Shah
Life of this patent
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Abstract
An environmental control system is provided and includes equipment to generate an environmental control effect, a damper associated with a zone to control a portion of the environmental control effect permitted to affect the zone by assuming one of various damper positions and a capacity controller operably coupled to the equipment and the damper to control operation of the equipment and to adjust the damper to assume the one of the various damper positions based on a demand of the zone and a capacity of the equipment.
Claims12
A method of operating a capacity controller in a multi-zone environmental control system, comprising:
- converting zone demands for an environmental control effect of each zone of a plurality of zones into a demand signal and an available capacity signal;
- controlling an operational speed of equipment to provide the environmental control effect based on the demand signal;
- and
- adjusting each damper of a plurality of dampers respectively associated with each of the plurality of zones to assume in accordance corresponding ones of various damper positions based on the demand signal and the available capacity signal.
A method of operating an environmental control system, comprising:
- generating an environmental control effect through equipment;
- associating a damper with a zone to control a portion of the environmental control effect to thereby affect the zone by assuming one of various damper positions;
- and
- controlling operations of the equipment and adjusting the damper to assume the one of the various damper positions in accordance with an anti-windup structure and based on a demand and a noise limit of the zone and on a capacity limit of the equipment,
- wherein the method further comprising configuring the anti-windup structure to:
- multiply and divide an available capacity output from the equipment by a portion of total zone demand for each zone and a desired capacity, respectively, to obtain a first result,
- subtract a zone demand representation of a difference between a set point and an actual temperature from the first result to obtain a second result, and
- feed the second result into a control algorithm for controlling the equipment and the damper.
Dependencies are inferred from the claim text.