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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 connection with the building thermal environment, and cannot meet the demand for real-time temperature control
However, this system has the following defects: the temperature field distribution control is too complicated, easily affected by indoor personnel activities, which increases the calculation burden of equipment, increases the pressure and cost of equipment, and is not applicable to the temperature control of multi-connected air conditioners in residential villas
[0008] In general, the existing control methods for multi-connected air-conditioning units need to be further improved in terms of real-time performance, accuracy and applicability

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

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Embodiment 1

[0061] A control method for multi-connected air-conditioning units based on digital twin technology, which is controlled in units of functional areas, and the control of each functional area includes:

[0062] Heat flow calculation step: obtain indoor measurement data at a given moment, and use the resistance-capacitance model of the functional area to calculate the indoor air heat flow at the corresponding moment, which is recorded as the actual heat flow; indoor measurement data includes wall temperature, indoor air temperature and indoor temperature. Regenerator temperature;

[0063] The first prediction step: Calculate the actual heat flow at each time in the n-1 moments before the given time respectively, obtain the time series of heat flow, and input it into the trained time series prediction model, and obtain the indoor air heat flow at the given time The predicted value is recorded as the first predicted heat flow;

[0064] The second prediction step: obtain the indoo...

Embodiment 2

[0088] A multi-connected 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 indoor measurement data at a given time, and use the resistance-capacity model of the functional area to calculate the indoor air heat flow at the corresponding time, which is recorded as the actual heat flow; the indoor measurement data includes wall temperature, indoor air temperature and the temperature of the indoor heat storage body;

[0091] The first prediction module is used to calculate the actual heat flow at each time in the n-1 moments before the given time, obtain the heat flow time series, and input it to the trained time series prediction model to obtain the indoor air at the gi...

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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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