A predictive control method for fan coil units

A technology of predictive control and fan coil unit, applied in mechanical equipment and other directions, can solve the problems of indoor temperature being difficult to reach a constant temperature, difficult to experience comfort, and constant temperature indoor air environment. It achieves low model requirements, good adjustment effect, and simple strategy. Effect

Active Publication Date: 2021-05-07
广州市特沃能源管理有限公司
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Problems solved by technology

The fan coil unit is controlled by a controller installed indoors. The existing control methods all use PID control. It is difficult for the indoor temperature to achieve a constant temperature effect, making it difficult for users to experience a comfortable and constant temperature indoor air environment when using it.

Method used

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  • A predictive control method for fan coil units
  • A predictive control method for fan coil units
  • A predictive control method for fan coil units

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Embodiment 1

[0054] This embodiment provides a fan coil predictive control method, such as Figure 1-4 shown, which includes the following steps:

[0055]S1, establish a prediction model, use the prediction model to model and predict the indoor temperature dynamic process; the prediction model of this embodiment adopts the BP neural network prediction model, see figure 2 , whose input parameters include: outdoor solar radiation intensity X 1 (k), outdoor temperature X 2 (k), air supply temperature X 3 (k), indoor temperature X 4 (k), blower control volume U fan , Valve control volume U valve ; The output parameter is the indoor temperature X at the next moment 4 (k+1); where k is the current moment, and k+1 represents the next moment; predict the next moment (that is, the future output value) through the prediction model, and obtain the fan coil system under the current control state, will The obtained indoor temperature value is used to compare and adjust with the indoor temperatu...

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Abstract

The invention provides a fan coil predictive control method, which includes: S1, establishing a predictive model, and using the predictive model to model and predict the dynamic process of indoor temperature; S2, the predictive controller is realized by using a three-layer feedforward neural network, The indoor temperature value at the current moment and the set value of the indoor temperature at the next moment are used as the input of the neural network controller; the output of the neural network controller is the control quantity that can adjust the indoor temperature; the variational method is used to control the neural network controller Carry out online rolling optimization, and the optimization goal is to make the optimization objective function the best, so as to obtain the best control quantity; S3, adjust the indoor temperature according to the value of the best control quantity obtained after optimization. The present invention adjusts the indoor temperature by obtaining the optimal control amount through predictive control rolling optimization; since the optimization objective function comprehensively considers the two factors of temperature error and energy consumption, the system can keep the indoor temperature up to the set value while also It has the effect of saving energy.

Description

technical field [0001] The invention relates to the technical field of fan coil control, in particular to a predictive control method for a fan coil system. Background technique [0002] The fan coil unit is the terminal product of the air conditioning system. It is composed of a small fan, a DC brushless motor and an air heat exchanger. The tubes are then cooled (heated) to keep the room temperature constant. The fan coil unit is controlled by a controller installed indoors. The existing control methods all use PID control. It is difficult for the indoor temperature to achieve a constant temperature effect, making it difficult for users to experience a comfortable and constant temperature indoor air environment when using it. [0003] Therefore, how to provide a fan coil control method capable of maintaining indoor temperature or humidity within a certain range and creating an indoor air environment suitable for human comfort has become a problem to be solved in the indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/63
CPCF24F11/63
Inventor 魏东何友全
Owner 广州市特沃能源管理有限公司
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