A kind of frequency conversion air supply control method of air conditioning system

Abstract

The invention relates to a frequency conversion and air supplying control method used for an industrial combined type high-power air conditioner system. According to the frequency conversion and air supplying control method of the air conditioner system, in terms of the cold and hot load requirements in a control area, the frequency of a fan is adjusted in real time, on-demand air supplying is realized, energy consumption is reduced, and meanwhile the control accuracy can be improved. The frequency conversion and air supplying control method comprises the following steps that whether the frequency conversion fan operates or not is judged, and if the frequency conversion fan does not operate, a frequency output value being P=0 is sent to a frequency converter; if the frequency conversion fan operates, the apertures and weight coefficients relative to the following valves, namely a table cold valve, a heating valve and a humidification valve are calculated correspondingly; according to the apertures and the weight coefficients, a frequency adjustment cardinal number B is calculated; according to the difference between an air supplying temperature and a set temperature, a frequency adjustment gain coefficient C is calculated; and according to the frequency adjustment cardinal number B and the frequency adjustment gain coefficient C, the frequency output value is calculated, and the frequency output value P is sent to the frequency converter to control the frequency conversion fan to convert frequency. The control method can quickly and accurately realize on-demand supplying of the air supplying amount according to the change of temperature and humidity loads, and energy saving and consumption reduction are achieved.

Description

technical field [0001] The invention relates to a frequency conversion air supply control method used in an industrial combined high-power air-conditioning system. Background technique [0002] In the industrial combined high-power air conditioning system, the maximum frequency of the fan is designed according to the maximum load demand of the system. However, the air conditioner does not need to run at the highest frequency of the fan most of the time during operation, so it is necessary to make the fan run at a more optimal frequency through precise control to achieve energy saving and consumption reduction. Especially in the tobacco system, the power consumption of the air conditioner basically accounts for more than 70% of the total power consumption. However, in the prior art, the frequency control of industrial combined high-power air-conditioning fans is generally fixed and set according to seasons, for example, it always operates above 48HZ in summer, 45-48HZ in win...

AI Technical Summary

Problems solved by technology

At present, the control of the air supply volume of the fan is carried out by using the difference between the air supply temperature and the set temperature as a single variable. low precision

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