臺灣博碩士論文加值系統

本論文試圖從多角度的方式來探討變頻冷氣之冷凍循環與溫度控制系統的架構，並試作一單純的變頻溫控系統。
冷氣系統的壓縮機控制方式從早期的定頻控制方式進入了變頻控制，因此，為配合壓縮機轉速變化後冷凝器散熱速率隨之變化的情形，散熱風扇之轉速控制亦從定轉速改為三段或四段不等的轉速，甚至有使用DC無刷馬達作風扇馬達以作更多段或轉速高低差異極大的風扇速度控制。
在冷凍循環方面，變成變頻的冷凍系統後，系統中單位時間內的冷媒循環量也隨之變化，因此傳統冷媒過熱度控制常用的毛細管或膨脹閥將無法在變動的操作環境中維持適當的過熱度，因此在冷媒過熱度控制上有朝著電子式膨脹閥發展的趨勢。

This article discusses the refrigerant cycle of an inverter’s airconditioner and the Temperature control system in multi viewpoint. And, make a simple inverter temperature control system.
The control method of airconditioner’s compressor is changing from constant speed control into inverter control. The speed of compressor change, the heat transfer rate of condenser change. So the fan speed controlling of the condenser cooling need more speed’s variation. Even the using of DC brushless motor became popular because of that the DC brushless motor could change its speed in very large range.
In refrigerant cycle, the compressor speed change, the quantity of refrigerant cycle rate change, too. We couldn’t control the refrigerant system at a proper overheat state if we just only use the capillary tube or expansion valve. So, there is a trend that the overheat control for a refrigerant cycle forward to electronic expansion valve.

Chapter 1 Introduction
1-1 Why Inverter Airconditioner …………………………... 3
1-2 Airconditioner’s Basic Cycle ………………………….. 5
1-3 Inverter’s Airconditioner’s Cycle ……………………… 6
1-4 Inverter’s HeatpumpAirconditioner ……………………..7
1-5 Usage of Electronic Expansion Valve …………………...9
Chapter 2 Making and Getting Inverter
2-1 Making Inverter
2-1-1 Inverter’s Architecture ……………………….11
2-1-2 Control Program ……………………………..13
2-1-3 Operation Test ……………………………….14
2-2 Getting Inverter ……………………………………...15
Chapter 3 Making Airconditioner’s Controlling System
3-1 Controlling System’s Architecture …………………..17
3-2 Selection of Microcontroller ………………………...18
3-3 Temperature Sensor’s Circuit ………………………..19
3-4 Relay Driving Interface ………………………………21
3-5 UART Interface ………………………………………23
Chapter 4 Room Temperature Control for Inverter’s Airconditioner
4-1 Introduction …………………………………………..24
4-2 Common Method of Temperature Control
4-2-1 On-Off Control …………………...…………...24
4-2-2 Proportional Control ………………………….27
4-2-3 Proportional Integrate Control ………………..27
4-2-4 Proportional Integrate Differential Control …..28
4-3 Multi-Frequency Control
4-3-1 Introduction …………………………………..28
4-3-2 Controlling Method …………………………..30
4-3-3 Multi-Frequency Control -- Experiment 1 ……31
4-3-4 Multi-Frequency Control -- Experiment 2 ……37
Chapter 5 Conclusion ……………………………………………….40
Reference ……………………………………………………………….41

1. J.P. Holman, 「Heat Transfer」 , McGraw-Hill Inc. ,1992
2. Wilbert F. Stoecker, Jerold W. Jones 著，「冷凍與空調」蘇金佳 譯, McGraw-Hill Inc. 1998
3. Stephen J. Chapman 著，「電機機械基本原理」，陳秋麟 譯，東華書局，民國84年
4. 許守平 著，「冷凍空調原理與工程(上/下)」，全華圖書，民國83年
5. 長竹 和夫 著，「家電用 モ－タ‧インバ－タ技術」，日刊工業新聞社，2000年
6. 吳榮豪，「變頻冷氣機的系統模擬和設計」，交通大學 碩士論文
7. Gene F. Franklin 著，「自動控制系統─動態系統回饋控制」陳志信、蕭名宏 譯，高立圖書有限公司，民國77年
8. Kevin M. Passino、Stephen Yurkovich，「Fuzzy Control」Addison Wesley Longman, Inc. 1998
9. Michael J. Moran、Howard N. Shapiro 著「Fundamentals of Engineering Thermodynamics」，John Wiley & Sons,Inc.，1993
10. 見城尚志 著，「變頻器實用電路設計與驅動軟體」，許溢适 譯，文笙書局，民國85年
11. 見城尚志 著，「變頻器的實用設計」，許溢适 譯，文笙書局，民國84年