Multi-split air conditioning unit control method and control system based on digital twinning technology

A multi-connected air conditioner and unit control technology, which is applied to air conditioning systems, heating and ventilation control systems, and control inputs related to air characteristics, can solve the problems of low applicability of multi-connected air conditioners, ventilation volume, and refrigerant flow rate. Problems such as complex control and real-time temperature control can not meet the demand, so as to avoid equipment pressure and control cost, realize control accuracy and real-time performance, increase equipment pressure and control cost

Active Publication Date: 2021-12-07
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The regulation of this control logic only takes the change of temperature and humidity as the response variable, so in order to quickly adjust the indoor temperature and humidity to the set value in a short period of time, the energy cost is often ignored; when there are multiple Different functional areas, and each functional area has different optimal temperature and humidity requirements, the regulation of ventilation and refrigerant flow in each space will be more complicated
However, this method has the following defects: the temperature adjustment logic is only established based on the device side, lacks dynamic correspondence and

Method used

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  • Multi-split air conditioning unit control method and control system based on digital twinning technology
  • Multi-split air conditioning unit control method and control system based on digital twinning technology
  • Multi-split air conditioning unit control method and control system based on digital twinning technology

Examples

Experimental program
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Example Embodiment

[0060] Example 1:

[0061] Multi-split air conditioning unit based on the digital control method of a twin technology to function as the unit is controlled, and control for each ribbon comprising:

[0062] Thermal flow calculation step: obtains the indoor measurement data at a given time, and utilizes the internal air heat flow of the corresponding time to calculate the internal air flow of the corresponding time, it is recorded as the actual heat flow; the indoor measurement data includes wall temperature, indoor air temperature and indoor Regenerative temperature;

[0063] The first prediction step: separately calculates the actual thermal flow of each time in the n-1 time before the given time, obtains the heat flow timing sequence, and inputs to the trained timing prediction model to obtain a given time of the indoor air heat flow The predicted value is recorded as the first predicted heat flow;

[0064] A second prediction step: measurement data are acquired for each time poi...

Example Embodiment

[0087] Example 2:

[0088] Multiple machine air conditioning unit control system based on digital twin technology, such as image 3 As shown, including: user layer and device layer;

[0089] The user layer includes: heat flow calculation module, first prediction module, second prediction module, linear fitting module, and target prediction module;

[0090] The heat flow calculation module is used to obtain the indoor measurement data of a given time, and utilize the indoor air flow of the corresponding time, which is used to calculate the internal air flow of the corresponding time, which is recorded as the actual heat flow; the indoor measurement data includes a wall temperature, indoor air temperature And indoor heat storage temperature;

[0091] The first prediction module is configured to calculate the actual thermal flow of each time in the n-1 time before the given time, obtain the heat flow timing sequence, and input to the trained timing prediction model to obtain an indoor...

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Abstract

The invention discloses a multi-split air conditioning unit control method and control system based on a digital twinning technology, and belongs to the field of heating and ventilation air conditioners. The method comprises the following steps: obtaining indoor measurement data at the given moment, and calculating the actual heat flow through a resistance-capacitance model of a functional area; calculating the actual heat flow at n-1 moments before the given moment and inputting the actual heat flow into time sequence prediction models to obtain a first predicted heat flow; obtaining indoor measurement data at n-1 moments before the given moment respectively and inputting the indoor measurement data into the three time sequence prediction models respectively to obtain indoor measurement data prediction values, and calculating a second prediction heat flow by using a resistance-capacitance model; for the given moment and n-1 moments before the given moment, linearly fitting the actual heat flow according to the two predicted heat flows to obtain a fitting function; and calculating a heat flow predicted value according to the two predicted heat flows at the target moment and the fitting function at the previous moment, and controlling an air conditioning unit in the functional area according to the heat flow predicted value. The real-time performance, the accuracy and the applicability of control over the multi-split air conditioning unit can be improved.

Description

technical field [0001] The invention belongs to the field of heating, ventilating and air-conditioning, and more specifically relates to a control method and a control system for a multi-connected air-conditioning unit based on digital twin technology. Background technique [0002] The current refrigeration and air-conditioning system realizes regional temperature adjustment by cooling or warming up the space as a whole, so as to meet the comfort requirements of indoor occupants. But this temperature regulation logic is usually implemented by feedback regulation triggered by the difference between the set temperature and humidity and the indoor greenhouse temperature detected by the sensor. However, this control logic has two shortcomings: [0003] (1) This control logic is a hysteresis control logic. In other words, the adjustment action of the air conditioning system always lags behind the changes in environmental conditions. Only when the indoor thermal environment has c...

Claims

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Application Information

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IPC IPC(8): F24F5/00F24F11/61F24F11/64F24F11/88F24F110/12F24F110/10
CPCF24F5/0017F24F5/0046F24F11/61F24F11/64F24F11/88F24F2110/12F24F2110/10F24F2005/0064Y02E60/14
Inventor 陈焕新周镇新李昱瑾韩林志苟伟
Owner HUAZHONG UNIV OF SCI & TECH
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