- 學位論文
應用田口法於恆溫冷凍系統之參數分析與設計
Parameter Analysis and Design for Stable Temperature Controlled Refrigerators by Taguchi Method
摘要
由於工業的發達，使得馬達普及率大幅地提升，而近年來馬達的用電量也幾乎占了全國百分之七十以上。夏天的民生用電量中，冷凍空調系統用電量占最大部分。伴隨著經濟成長，國民生活水準提升，對於冷凍空調系統的需求也成長快速，但環保意識抬頭，要每年大量擴充發電設備以因應用電量的快速成長是非常不容易的。因此，開發高效率冷凍空調系統即是改善台灣目前用電需求的首要課題。 本文選用冷凍系統中之冰箱作為研究對象，並搭配田口方法來控制變頻壓縮機運轉及調整風門大小以達到恆溫效果。其中，冰箱系統主要包含壓縮機、冷凍室風扇、風道閥門、溫度，配合田口方法進行實驗分析與系統參數設計，本實驗設計田口方法之控制因子為冷凍室風扇、風道閥門、溫度感測器擺放位置及冷藏室開啟時間，利用變頻控制壓縮機馬達運轉，且控制冷藏室風扇轉速及風道閥門調節冷氣流量，並測試溫度感測器擺放位置及冰箱冷藏室開啟時間長短對系統的影響，依照所採用直交表中各因子之不同水準進行實驗，並依實驗結果統計分析各因子對於冷卻效果之影響，以作為日後變頻冰箱恆溫控制之參數設計依據，進而達到恆溫控制之目的。 本文係利用冰箱系統進行田口方法實驗參數設計，可減少實驗次數及找出各因子對於系統之影響，並藉由參數分析來設計適當的控制系統。
並列摘要
As a result of industry developed, causes the motor popular rate to promote largely. The recent years motor's power consumption of the motor has nearly occupied the whole country power consumption above 70%.The electricity power used for the refrigerators and air-condition systems occupied the most major part in the summer livelihood of the people uses electricity power. As the economic enlarging and the national living standard improving, the requirement of the refrigerators and air-condition devices are increasing quickly. However, it is not easy to expand the power station every year because the environmental consciousness is been noticed. Therefore, the primary topic of improving the power factor to reduce the power consumption demand is to develop a high-efficiency frozen air-condition system. This article selects the refrigerator as the test experiment. Our research project is the refrigerator of the air-condition system. We use the Taguchi Method to control the inverter compressor and damper to form the stable-temperature control system. The refrigerator system mainly contains the compressor, the refrigerating room ventilator, the damper, and the temperature sensor. We used the Taguchi methods to test the system and to analyze system characteristics and to design the control parameters by the experiment result. The speed of cooling room fans, the opening rate of damper, the temperature sensor position and the cold room opening time are chosen as the control factors. We used different rotating speed to operate the compressor motor and cooling room fan and controlled the cool airflow by the damper opening rate as shown in the orthogonal arrays to find the influences of these factors by the time for the system reaching a stable-temperature result. This article is carries on the Taguchi method to design the experiment for the refrigerator system. It shown the testing sequence would be reduced, the influences of different factors were also been found and we could design the control system by the system parametric analysis.