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Fan coil prediction control method

A technology of predictive control and fan coil unit, which is applied in the direction of machinery and equipment, can solve the problems of difficult to achieve constant temperature indoors, difficult to experience comfort, constant indoor air environment, etc., to achieve low model requirements, good adjustment effect, simple strategy Effect

Active Publication Date: 2019-11-05
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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Embodiment 1

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

[0055]S1, establish a prediction model, and use the prediction model to model and predict the dynamic process of indoor temperature; 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), supply air temperature X 3 (k), indoor temperature X 4 (k), blower control quantity U fan , valve control quantity 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 current control state of the fan coil system. The obtained room temperature value is used to compare and adjust with the room temperature...

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Abstract

The invention provides a fan coil prediction control method. The fan coil prediction control method comprises the following steps that S1, a prediction model is established, and an indoor temperaturedynamic process is modeled and predicted by using the prediction model; S2, a prediction controller is realized by adopting a three-layer feedforward neural network, an indoor temperature value at thecurrent moment and an indoor temperature set value at the next moment are used as input of a neural network controller, output of the neural network controller is the control amount capable of adjusting the indoor temperature, the neural network controller is subjected to online rolling optimization by adopting a variational method, the optimization objective can make the optimal objective function to be optimal, and therefore the optimal control amount is obtained; S3, the indoor temperature is adjusted according to the value of the optimal control amount obtained after optimization. According to the fan coil prediction control method, the optimal control amount is obtained through predictive control rolling optimization to adjust the indoor temperature, due to the fact that factors suchas temperature error and energy consumption are comprehensively considered by the optimal objective function, the system has the energy-saving effect while the system enable the indoor temperature and the set value to be consistent.

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 Applications(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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