- 學位論文
以致冷晶片模擬電漿聚合膜上結霜與除霜的型態
Study of the Frosting/Defrosting Behaviors on the Plasma Polymerized Films with a Thermoelectric Cooler
摘要
電漿鍍膜技術隨著科技的進步已日漸成熟，而被廣泛的討論與應用，亦同時致冷晶片是一種新型的小型冷卻器有著重量輕、反應時間快的優點，在近年來常常被使用在解決高科技設備的散熱問題。由於冷凍系統中的蒸發器會發生結霜的問題而影響冷凍能力甚鉅，因此吾人使用電漿鍍膜的方法來改善此一問題，除了能減緩結霜的發生並且能提升除霜的能力。 本文係使用致冷晶片控制溫度以模擬蒸發器表面結霜與除霜的狀況，並觀察有鍍膜與無鍍膜試片的表面，在結霜時的界面狀態以及除霜時的效果，發現電漿疏水膜對材料表面結霜於除霜的影響，從實驗照片結果得知，經過電漿疏水鍍膜處理過的試片表面在進行結霜步驟時水滴的成長速率慢，而除霜時電漿疏水膜可以有效的減少水滴的殘留量。水滴的凝結速率慢即可以延後結霜產生的時間，除霜時水滴殘留在試片上的量少將可減少材料腐蝕的情形。
並列摘要
Adapting with the progressed science, the plasma deposition of thin film has been well-developed, it have been extensively discussed and applied since recent years. The Thermo-Electric Cooler is a new kind of micro-cooler. It has the advantages of light weight and fast response. It is widely used to improve the heat exchange problem on the High-Tech equipment. Because the frosting problem will occur on the evaporator surface in the refrigeration system, it will obviously reduce the heat exchange performance. We utilize the plasma coating technology to effectively retard frosting process and to increase the defrosting efficiency. By controlling the temperature of the thermoelectric cooler, we can simulate the frosting and the defrosting circumstance on the evaporator surface. To observe the micro structure of frosting condition and the defrosting resultant on the coated and un-coated test sample. Finally, we discuss the affection of plasma polymerized film on the test sample in the frosting and defrosting state. It can be found in the experiment photo that when the coated test sample to carry out the frosting procedure, the droplet condensation is slow. The plasma polymerized film can efficiently reduce droplet retained on the coated test sample. Slow droplet formation rate can prolong the frosting occur. The less droplet retained on the test sample the fewer erosion will arise on test sample.