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The defense date of the thesis is 2009-07-28
The current date is 2019-05-24
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URN etd-0727109-171611 Statistics This thesis had been viewed 2286 times. Download 10 times. Author Bo-Min Shih Author's Email Address No Public. Department Mechanical Engineering Year 2008 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 64 Title Design and Fabrication of a Cold Therapeutic Product by Thermoelectric Effect Keyword seebeck effect cold therapy thermoelectric cooler temperature control temperature control thermoelectric cooler cold therapy seebeck effect Abstract The cold therapy is often used to bring down a fever and to cure sports injuries. Most of the ice packs, bought from the market, are restrained by the time duration because the cold water or phase change material in ice pack can sustain within half hour when leaving the refrigerator. Before cold therapy, the ice packs must be stored in the refrigerator for at least an hour for the next therapy which is not convenient at all. Also, the inappropriate temperature span during the cold therapy is often the main cause of skin frostbite, nerve paralysis and other secondary injuries. In this study aims to develop a new cooler device which used thermo-electric cooler (TEC).And the temperature is control by a LM358 comparator, when water temperature is higher than target temperature , the comparator will instruct relay turn on TEC until water temperature is lower than target and then relay turn off TEC. This is the way to maintain the constant temperature. The continuous electricity supply helps the water pack to maintain the constant temperature all the time, not as a general bag only enough to maintain the 10-20 minutes. The baby is not suitable for taking antipyretic with a fever, they can use this device to bring down a fever, the cold pack doesn’t need to replace in the whole night. And the temperature control prevents secondary injuries from cold therapy.
Without external thermal load, this cooler demonstrates that the water in ice pack takes within 16 minutes to lower the fluid temperature from 24℃ to 18℃,When the external thermal load is 5 Watts, this system takes only 22 minutes to do so. Therefore, this TEC is in a more convenient way and has broad applications than the common ice packs.
Advisor Committee Hong-Sen Kou - advisor
Ji-Jen Lee - advisor
C.Y.Shieh - co-chair
I.S.Tsai - co-chair
Files Date of Defense 2009-07-07 Date of Submission 2009-07-28