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Central air-conditioning electrostatic precipitation variable voltage fuzzy control device and control method

An electrostatic precipitator and fuzzy control technology, applied in the control input involving air characteristics, space heating and ventilation control input, air conditioning system, etc. The dust removal voltage and voltage control method are advanced and reasonable, and the effect of reducing the ozone concentration at the outlet

Active Publication Date: 2019-03-29
中天绿地环保科技(西安)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Electrostatic dust removal technology is an effective means to remove PM2.5 and other harmful particles in the air. In recent years, people have paid more and more attention to it. However, due to the immature technology, there are many disadvantages when using it.
In particular, the dust removal voltage of electrostatic precipitators for air conditioners is mostly selected based on experience, and the voltage value is fixed and will not change with the change of operating conditions. Spark discharge, corona occlusion, and ozone exceeding the standard are likely to occur during work, which reduces the actual use. Effect

Method used

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  • Central air-conditioning electrostatic precipitation variable voltage fuzzy control device and control method
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Embodiment 1

[0091] The present invention is composed of six modules including a power supply module I, a controller and upper computer module II, an indoor environment monitoring module III, a frequency conversion fan module IV, a high-voltage electrostatic dust removal module V and an air supply parameter monitoring module VI. Power module Ⅰ is composed of 220V / 380V AC power supply and switching power supply; controller and host computer module Ⅱ is composed of Siemens PLC controller and KingView host computer; indoor environment monitoring module Ⅲ is composed of ozone sensor, CO 2 sensor and indoor PM2.5 sensor; frequency conversion fan module IV is composed of frequency converter and frequency conversion fan; high-voltage electrostatic precipitator module V is composed of adjustable high-voltage power supply and electrostatic precipitator; air supply parameter monitoring module VI is composed of PM2.5 sensor before dust removal , PM2.5 sensor, temperature and humidity sensor, and wind ...

Embodiment 2

[0097] Under normal circumstances, the central air-conditioning fresh air system, on the one hand, changes the fresh air flow by changing the fan speed through the frequency conversion fan, so as to achieve the purpose of controlling the carbon dioxide concentration in the building. The control target of the carbon dioxide concentration is below 800PPM; on the other hand, by adjusting The voltage of the electrostatic precipitator is used to achieve the purpose of controlling the PM2.5 concentration at the outlet of the electrostatic precipitator, and the control target of the PM2.5 concentration at the outlet of the electrostatic precipitator is below 50PPM.

[0098] In a certain case, when the frequency of the fan is 35Hz, the indoor carbon dioxide concentration is 1100PPM. At this time, the concentration of carbon dioxide exceeds the standard. In order to control the concentration of carbon dioxide below 800PPM, the frequency of the fan is increased to 45Hz. The carbon dioxide...

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Abstract

The invention discloses a central air-conditioning electrostatic precipitation variable voltage fuzzy control device and control method. The method comprises the steps that the indoor PM2.5 concentration value is collected; the PM2.5 concentration preset value is compared with the collected indoor PM2.5 concentration value, calculation is carried out to obtain the PM2.5 concentration deviation, and calculation is carried out to obtain the deviation change rate; the PM2.5 concentration deviation and the deviation change rate obtained in the step 2 are used as the input of a PM2.5 fuzzy controller, and the electrostatic precipitating voltage is used as the output of the PM2.5 fuzzy controller; and input fuzzification is firstly carried out in the PM2.5 fuzzy controller, the voltage fuzzy output is obtained through fuzzy adjudication, and then defuzzification is carried out to obtain the actual output of the electrostatic precipitating voltage. By means of the central air-conditioning electrostatic precipitation variable voltage fuzzy control device and control method, the voltage change can be controlled along with the working condition, the problems of spark discharge, corona occlusion and ozone standard exceeding can be eliminated, and the actual use effect is improved.

Description

technical field [0001] The invention belongs to the technical field of electrostatic dust removal for air intake of central air conditioners, and in particular relates to a fuzzy control device and control method for variable voltage of electrostatic dust removal of central air conditioners. Background technique [0002] At present, my country's economy is in a period of extensive and high-speed growth. The excessive emission of factory exhaust gas, the increase of vehicle exhaust, the burning of rural straw and coal-fired heating in winter have led to the increasingly serious problem of smog in our country. An important indicator to measure the severity of smog is the concentration of PM2.5 particulate matter in the air. PM2.5 particulate matter refers to dust particles with a particle size less than or equal to 2.5 μm. In winter, the outdoor PM2.5 concentration in major cities often exceeds the table. Citizens must wear masks when traveling. Short-term exposure to severe s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F3/16F24F11/61F24F11/64F24F11/77F24F110/10F24F110/20F24F110/30F24F110/64F24F110/70F24F110/74
CPCF24F11/61F24F11/64F24F11/77F24F2110/10F24F2110/20F24F2110/30F24F2110/64F24F2110/70F24F2110/74F24F8/10F24F8/192Y02B30/70
Inventor 王军乔亦凡刘铭
Owner 中天绿地环保科技(西安)有限公司