空氣源熱泵熱水器控制系統(tǒng)的設計
發(fā)布時間：2018-10-16 10:23
【摘要】：在環(huán)境問題與能源危機日益嚴重的今天,空氣源熱泵熱水器以其節(jié)能、環(huán)保的特點在熱水器行業(yè)受到越來越多認可,從而在近年得到迅速發(fā)展。 空氣源熱泵熱水器是一種使用熱泵技術,將環(huán)境空氣中蘊藏的低溫熱量用來制取熱水的裝置,通過熱泵工質的熱力循環(huán)間接加熱制取熱水,能夠做到水電分離,大幅降低了觸電事故。當然,為了能夠充分發(fā)揮空氣源熱泵熱水器節(jié)能、環(huán)保、安全的優(yōu)勢是離不開設計合理的熱泵控制系統(tǒng)的支持。只有在熱泵控制系統(tǒng)的智能調控下,才能保證整個空氣源熱泵熱水器穩(wěn)定、可靠地運行。本文主要研究空氣源熱泵熱水器的電控系統(tǒng)。 首先,本文分析了空氣源熱泵熱水器工作原理,主要包括熱泵系統(tǒng)制熱過程以及室外蒸發(fā)器結霜時的除霜控制流程。闡述了熱泵工質的選用要求和目前廣泛使用的R22的特性。同時對實驗熱泵裝置的壓縮機、冷凝器、蒸發(fā)器、風機、熱力膨脹閥等主要組成部件在熱泵系統(tǒng)中的作用以及三相壓縮機變頻調速的原理作詳細說明。并在此基礎上對實驗熱泵系統(tǒng)中需要控制的對象進行分類總結。考慮成本因素依然是制約空氣源熱泵熱水器普及的主要原因,本文提出了以單片機作為控制芯片,配以三相SPWM波形發(fā)生器與智能功率模塊相結合的電控系統(tǒng)。 其次,分析控制系統(tǒng)工作原理以及實驗熱泵裝置所需要達到基本目標,給出控制系統(tǒng)的硬件原理圖SCH設計、PCB設計和程序軟件設計。熱泵控制系統(tǒng)硬件電路主要包括直流供電電路、SPWM波型發(fā)生器電路、智能功率模塊電路、水位信號電路、溫度采集電路、按鍵電路和外部中斷保護電路等。系統(tǒng)控制程序主要包括溫度采集子程序、溫度設定子程序、SM2001波形發(fā)生器控制子程序、溫度PID控制子程序、除霜控制子程序等。同時對實驗空氣源熱泵熱水器裝置的主要部件,如壓縮機、風機、循環(huán)水泵的電氣接線方式給出說明。 最后,本文將所設計的空氣源熱泵熱水器電控系統(tǒng)與實驗空氣源熱泵熱水器裝置進行整合調試,以驗證控制系統(tǒng)的可行性。系統(tǒng)測試中闡述了制熱溫度系統(tǒng)中運用經驗法PID參數(shù)整定的一般過程,并對系統(tǒng)水溫可能出現(xiàn)振蕩的原因進行預判。通過測試驗了證本文所設計的控制系統(tǒng)能夠保障實驗熱泵裝置穩(wěn)定運行,達到了預期的設計要求。
[Abstract]:With the increasingly serious environmental problems and energy crisis, air source heat pump water heaters have been more and more recognized in the water heater industry for their energy saving and environmental protection characteristics, which have been developed rapidly in recent years. Air source heat pump water heater is a device that uses heat pump technology to make hot water by using the low temperature heat stored in the ambient air, and indirectly heating the heat pump working fluid to make hot water, which can achieve the separation of water and electricity. Electric shock accidents have been significantly reduced. Of course, in order to give full play to the air source heat pump water heater energy-saving, environmental protection, safety advantage is inseparable from the design of a reasonable heat pump control system support. Only under the intelligent control of the heat pump control system can the whole air source heat pump water heater operate stably and reliably. This paper mainly studies the electric control system of air source heat pump water heater. Firstly, the working principle of air source heat pump water heater is analyzed, which includes heat pump system heating process and defrosting control process when outdoor evaporator frosts. The selection requirements of heat pump working fluids and the characteristics of the widely used R 22 are described. At the same time, the function of compressor, condenser, evaporator, fan and thermal expansion valve of experimental heat pump device in heat pump system and the principle of frequency conversion speed regulation of three-phase compressor are explained in detail. On this basis, the experimental heat pump system need to control the object classification and summary. Considering the cost factor is still the main reason of restricting the popularity of air-source heat pump water heater, this paper proposes an electronic control system which uses single-chip microcomputer as control chip and combines three-phase SPWM waveform generator with intelligent power module. Secondly, the working principle of the control system and the basic goal of the experimental heat pump device are analyzed. The hardware schematic diagram SCH design, PCB design and program software design of the control system are given. The hardware circuit of heat pump control system mainly includes DC power supply circuit, SPWM wave generator circuit, intelligent power module circuit, water level signal circuit, temperature acquisition circuit, key circuit and external interrupt protection circuit. The system control program mainly includes temperature acquisition subroutine, temperature setting subroutine, SM2001 waveform generator control subroutine, temperature PID control subroutine, defrosting control subroutine and so on. At the same time, the main parts of experimental air source heat pump water heater, such as compressor, fan and circulating water pump, are explained. Finally, the electronic control system of the air source heat pump water heater is integrated with the experimental air source heat pump water heater to verify the feasibility of the control system. In the system test, the general process of PID parameter setting using empirical method in the heating temperature system is expounded, and the reason for the possible oscillation of the water temperature of the system is forecasted. The experimental results show that the control system designed in this paper can ensure the stable operation of the experimental heat pump device and meet the expected design requirements.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU822
本文編號：2274060
[Abstract]:With the increasingly serious environmental problems and energy crisis, air source heat pump water heaters have been more and more recognized in the water heater industry for their energy saving and environmental protection characteristics, which have been developed rapidly in recent years. Air source heat pump water heater is a device that uses heat pump technology to make hot water by using the low temperature heat stored in the ambient air, and indirectly heating the heat pump working fluid to make hot water, which can achieve the separation of water and electricity. Electric shock accidents have been significantly reduced. Of course, in order to give full play to the air source heat pump water heater energy-saving, environmental protection, safety advantage is inseparable from the design of a reasonable heat pump control system support. Only under the intelligent control of the heat pump control system can the whole air source heat pump water heater operate stably and reliably. This paper mainly studies the electric control system of air source heat pump water heater. Firstly, the working principle of air source heat pump water heater is analyzed, which includes heat pump system heating process and defrosting control process when outdoor evaporator frosts. The selection requirements of heat pump working fluids and the characteristics of the widely used R 22 are described. At the same time, the function of compressor, condenser, evaporator, fan and thermal expansion valve of experimental heat pump device in heat pump system and the principle of frequency conversion speed regulation of three-phase compressor are explained in detail. On this basis, the experimental heat pump system need to control the object classification and summary. Considering the cost factor is still the main reason of restricting the popularity of air-source heat pump water heater, this paper proposes an electronic control system which uses single-chip microcomputer as control chip and combines three-phase SPWM waveform generator with intelligent power module. Secondly, the working principle of the control system and the basic goal of the experimental heat pump device are analyzed. The hardware schematic diagram SCH design, PCB design and program software design of the control system are given. The hardware circuit of heat pump control system mainly includes DC power supply circuit, SPWM wave generator circuit, intelligent power module circuit, water level signal circuit, temperature acquisition circuit, key circuit and external interrupt protection circuit. The system control program mainly includes temperature acquisition subroutine, temperature setting subroutine, SM2001 waveform generator control subroutine, temperature PID control subroutine, defrosting control subroutine and so on. At the same time, the main parts of experimental air source heat pump water heater, such as compressor, fan and circulating water pump, are explained. Finally, the electronic control system of the air source heat pump water heater is integrated with the experimental air source heat pump water heater to verify the feasibility of the control system. In the system test, the general process of PID parameter setting using empirical method in the heating temperature system is expounded, and the reason for the possible oscillation of the water temperature of the system is forecasted. The experimental results show that the control system designed in this paper can ensure the stable operation of the experimental heat pump device and meet the expected design requirements.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU822
【參考文獻】
相關期刊論文 前10條
1 于學忠,馬勤紅;交/直流接觸器的選型與使用[J];電工技術雜志;2003年07期
2 黃桂梅;劉永立;曲衛(wèi)冬;;基于DS18B20與AVR單片機的測溫技術[J];儀器儀表用戶;2010年01期
3 秦富友;王三保;王培萍;李偉然;賈現(xiàn)偉;;光管和外螺紋管換熱器的換熱性能比較[J];化學工程與裝備;2008年01期
4 張良俊;吳靜怡;王如竹;陳鋼;;熱力膨脹閥在空氣源熱泵熱水器系統(tǒng)中穩(wěn)定特性的實驗研究[J];工程熱物理學報;2006年S1期
5 陳嘉澍;陳姝;卓獻榮;王端陽;徐娓;;R22和R134a應用于家用熱泵熱水器實驗性能研究[J];廣東化工;2006年06期
6 劉良德;;空氣源熱泵熱水器控制系統(tǒng)的設計[J];廣東技術師范學院學報;2005年06期
7 趙東升;范長征;;基于漏電保護器的研究及選型應用[J];硅谷;2013年15期
8 黃遜青;;家用電器低碳化技術——系統(tǒng)篇[J];電器;2012年08期
9 顏詩敏;姜周曙;黃國輝;;基于S3F9488單片機的熱泵熱水器控制器[J];機電工程;2009年02期
10 張華俊;陳偉;李勇;;空氣源熱泵熱水器研究與發(fā)展前景[J];中國建設信息供熱制冷;2007年08期
相關碩士學位論文 前1條
1 侯艷輝;中高溫熱泵熱水裝置的研究[D];天津科技大學;2009年
，本文編號：2274060
本文鏈接：http://sikaile.net/guanlilunwen/chengjian/2274060.html
