Apparatus and method for controlling the opening of a valve in a heating ventilation and air conditioning system
An air-conditioning system and control device technology, applied in air-conditioning systems, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve the energy flow measurement of undisclosed heat exchangers, undisclosed flow meters, undetermined energy flow Mass flow function correlation and other issues
Active Publication Date: 2015-12-16
BELIMO HOLDING AG
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- Application Information
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Problems solved by technology
No flow meter is disclosed, nor is the measurement of the energy flow through the heat exchanger, nor is the energy flow determined as a function of the mass flow of the heating or cooling medium, although the temperature difference between the supply and return temperatures is used for control Dependency, also did not use the gradient of such energy flow / mass flow function as a control parameter
Method used
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Embodiment Construction
[0031] exist figure 1 In , reference numeral 100 designates an HVAC system having a fluid circuit 101 comprising a pump 3, a valve 10, a heat exchanger 2 (such as a heat exchanger for heating or cooling a room), and Another heat exchanger optionally in the form of a cooler 5 . The valve 10 is provided with an actuator 1 , such as an electric motor, for opening and closing the valve 10 and thus using different positions of the valve 10 to control the flow through the fluid circuit 101 . Additionally, the pump(s) 3 themselves can vary the flow through the fluid circuit 101 . As schematically shown, the HVAC system 100 also includes a building control system 4 connected to a valve 10 or an actuator 11 , respectively. Those skilled in the art will understand that the depiction of the HVAC system 100 is very simplified and that the HVAC system 100 may comprise a plurality of fluid circuits 101, in each case one or more pumps 3, valves 19, heat exchangers 2 and possibly Selected...
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To control the opening of the valve (10) in the HVAC system (100) to regulate the fluid flow through the heat exchanger (2) of the HVAC system (100) φ ， And the amount E of energy exchanged by the heat exchanger (2) is adjusted to determine the energy per unit flow gradient (A), and the opening of the valve (10) is controlled according to the energy per unit flow gradient (A). The energy per unit flow gradient (A) is determined by measuring the flow through the valve (10) at successive time points φ1 , φ2 , to determine the amount of energy exchanged by the heat exchanger (2) at these time points E1 , E2 , and according to the traffic φ1 , φ2 and the energy exchanged E1 , E2 to calculate the energy per unit flow gradient (B). The energy per unit flow gradient (A) can be dynamically determined and used as a basis for setting the slope threshold of the heat energy exchanger (2), so that there is no need to store a fixed threshold.
Description
technical field [0001] The present invention relates to apparatus and methods for controlling the opening of valves in heating ventilation and air conditioning (HVAC) systems. In particular, the present invention relates to a method and control apparatus for controlling the opening of a valve in an HVAC system to regulate fluid flow through a heat exchanger of the HVAC system and thereby adjust the amount of energy exchanged by the heat exchanger. Background technique [0002] By adjusting the flow of fluid through a heat exchanger of an HVAC system, the amount of energy exchanged by the heat exchanger can be adjusted, for example, the amount of energy delivered by the heat exchanger to heat or cool a room in a building can be adjusted, or the The amount of energy drawn by the cooler for cooling purposes. When fluid delivery through a fluid circuit of an HVAC system is driven by one or more pumps, flow is typically adjusted by varying the opening or position of a valve, for...
Claims
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IPC IPC(8): F24F3/06F24F11/00F24D19/10
CPCF24F3/06F24F11/83F24F11/74F24F11/84
Inventor M.图伊拉尔德J.S.阿当斯
Owner BELIMO HOLDING AG