Hvac system, control method for hvac system, and computer-readable storage medium

Abstract

This application provides an HVAC system, a control method for an HVAC system, and a computer-readable storage medium. The HVAC system includes a chiller/heat pump unit, an air handling unit and a controller. The chiller/heat pump unit provides working fluid. The air handling unit is provided with a heat exchanger, air is blown indoors after exchanging heat with the working fluid flowing through the heat exchanger, and the air handling unit adjusts the supply air temperature based on a temperature setpoint. The controller is configured to acquire an expected emission level of an energy source powering the HVAC system and adjust the temperature setpoint based on the expected emission level.

What is claimed is: 
     
         1 . An HVAC system, comprising:
 a chiller or heat pump unit providing working fluid;   an air handling unit with a heat exchanger, air being blown indoors after exchanging heat with the working fluid flowing through the heat exchanger, and the air handling unit adjusting a supply air temperature based on a temperature setpoint; and   a controller configured to acquire an expected emission level of an energy source powering the HVAC system and adjust the temperature setpoint based on the expected emission level.   
     
     
         2 . The HVAC system according to  claim 1 , wherein the controller is configured to adjust the temperature setpoint in a manner that reduces the input power of the HVAC system when the expected emission level rises. 
     
     
         3 . The HVAC system according to  claim 2 , wherein
 when the expected emission level indicates that the energy source will become relatively dirtier,   the temperature setpoint is increased for a period of time in cooling mode, and   decreased for a period of time in heating mode.   
     
     
         4 . The HVAC system according to  claim 1 , wherein the controller is configured to adjust the temperature setpoint in a manner that increases the input power of the HVAC system when the expected emission level falls. 
     
     
         5 . The HVAC system according to  claim 4 , wherein
 when the expected emission level indicates that the energy source will become relatively cleaner,   the temperature setpoint is decreased for a period of time in cooling mode, and   increased for a period of time in heating mode.   
     
     
         6 . The HVAC system according to  claim 3 , wherein the magnitude of the rise or fall in the temperature setpoint exceeds the magnitude of change that is needed at the moment. 
     
     
         7 . The HVAC system according to  claim 1 , wherein the controller is also configured to acquire at least one parameter associated with thermal comfort, assess whether at least one parameter meets a preset constraint, and based on the assessment, decide whether to adjust the temperature setpoint based on the expected emission level. 
     
     
         8 . A control method for an HVAC system, wherein
 the HVAC system comprises:   a chiller or heat pump unit providing working fluid; and   an air handling unit with a heat exchanger, air being blown indoors after exchanging heat with the working fluid flowing through the heat exchanger, and the air handling unit adjusting a supply air temperature based on a temperature setpoint;   the control method comprises the following steps:   acquiring an expected emission level of an energy source powering the HVAC system; and   adjusting the temperature setpoint based on the expected emission level.   
     
     
         9 . The control method for an HVAC system according to  claim 8 , further comprising:
 in response to the step of adjusting the temperature setpoint based on the expected emission level, adjusting a flow rate or supply temperature of the working fluid.   
     
     
         10 . The control method for an HVAC system according to  claim 9 , wherein
 the air handling unit also comprises an external air inlet and a recirculated air inlet, a first damper is installed at the external air inlet, and a second damper is installed at the recirculated air inlet; and   the control method further comprises the following step:   in response to the step of adjusting the temperature setpoint based on the expected emission level, adjusting an opening degree of the first damper and/or the second damper.   
     
     
         11 . The control method for an HVAC system according to  claim 8 , wherein
 in the step of adjusting the temperature setpoint based on the expected emission level,   the input power of the HVAC system is reduced when the expected emission level rises, and   the input power of the HVAC system is increased when the expected emission level falls.   
     
     
         12 . The control method for an HVAC system according to  claim 8 , wherein
 in the step of adjusting the temperature setpoint based on the expected emission level,   when the expected emission level indicates that the energy source will become relatively dirtier, the temperature setpoint is increased for a period of time in cooling mode, and decreased for a period of time in heating mode; and   when the expected emission level indicates that the energy source will become relatively cleaner, the temperature setpoint is decreased for a period of time in cooling mode, and increased for a period of time in heating mode.   
     
     
         13 . The control method for an HVAC system according to  claim 8 , wherein
 in the step of adjusting the temperature setpoint based on the expected emission level, the magnitude of the rise/fall in the temperature setpoint exceeds the magnitude of change that is needed at the moment.   
     
     
         14 . The control method for an HVAC system according to  claim 8 , further comprising:
 acquiring at least one parameter associated with thermal comfort, assessing whether at least one parameter meets a preset constraint, and based on the assessment, deciding whether to execute the step of adjusting the temperature setpoint based on the expected emission level.   
     
     
         15 . The control method for an HVAC system according to  claim 14 , wherein
 at least one parameter comprises a difference between an actual temperature inside a building and a desired temperature inside the building;   the preset constraint is that the difference is greater than a threshold;   when the difference is greater than the threshold, the step of adjusting the temperature setpoint based on the expected emission level is not executed; and   when the difference is less than the threshold, the step of adjusting the temperature setpoint based on the expected emission level is executed.   
     
     
         16 . A computer-readable storage medium storing processor-readable instructions, wherein the processor-readable instructions, when executed by a processor, realize the control method for an HVAC system according to  claim 8 .