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.
Claims18
An environmental control system, comprising:
- 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 in accordance with an anti-windup structure and based on a demand and a noise limit of the zone and an equipment capacity limit,
- the anti-windup structure being configured 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 PI controller with a control algorithm for controlling the equipment and the damper.
A multi-zone environmental control system, comprising:
- equipment to generate an environmental control effect;
- a plurality of dampers respectively associated with a plurality of zones to each control a portion of the environmental control effect permitted to affect the corresponding one of the plurality of zones by assuming corresponding ones of various damper positions;
- and
- a capacity controller operably coupled to the equipment and the plurality of dampers to control operation of the equipment, the capacity controller including a plurality of zone controllers to adjust each of the dampers to assume the corresponding ones of the various damper positions in accordance with an anti-windup structure and based on a demand and a noise limit of the corresponding one of the plurality of zones and equipment capacity limits,
- the anti-windup structure being configured 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 of each zone from the first result to obtain a second result, and
- feed the second result into a PI controller with a control algorithm for controlling the equipment and each of the dampers.
Dependencies are inferred from the claim text.