HVAC system and control method thereof
AssigneeCarrier Corporation
InventorsYuHui Kuang, QiaoHui Shi
Life of this patent
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Abstract
The present application discloses a control method for an HVAC system in a relatively large spatial place and the HVAC system. The HVAC system comprises an air handling unit, and the air handling unit is provided with a valve through which a fluid medium passes and a fan; and the method comprises: monitoring a return air temperature of air circulated back to the air handling unit; providing a return air temperature setpoint of the HVAC system; and performing decoupling adjustment on one of the fan and the valve, and then adjusting the other of the fan and the valve so that the return air temperature is close to the return air temperature setpoint. According to the present application, the HVAC system can operate in a steady and energy-saving way.
Claims8
A control method for an HVAC system in a relatively large spatial place, wherein the HVAC system comprises an air handling unit, and the air handling unit is provided with a valve through which a fluid medium passes and a fan;
- and the method comprises:
- monitoring a return air temperature of air circulated back to the air handling unit;
- providing a return air temperature setpoint of the HVAC system;
- and
- performing decoupling adjustment on one of the fan and the valve, and then adjusting the other of the fan and the valve so that the return air temperature is close to the return air temperature setpoint;
- wherein opening degree adjustment of the valve is determined based on a supply air temperature of air leaving the air handling unit and a supply air temperature setpoint of the HVAC system;
- wherein adjustment on the fan and the valve comprises:
- increasing a speed of the fan after increasing the opening degree of the valve to a maximum value;
- and
- decreasing the opening degree of the valve after decreasing a speed of the fan to a minimum value.
Dependencies are inferred from the claim text.