An Integrated Product Design and Development Study of Cooling Fan for Personal Computer

• Main Authors: Chi-Hung Lo, 羅際鋐
• Other Authors: 陳文亮
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/97217648989335146396

碩士 === 樹德科技大學 === 應用設計研究所 === 94 === In recent years, the electronic equipment is continuously developing in shrinking its size and turning high performance. This trend urges the thermal management of electronics device to become gradually important. Furthermore, for the coming age of digital world, the issues such as saving time expenses of product development, raising the quality of product, lower cost of the manufacturing are all seen as the key competitive advantages for most hi- production and hi-plus-extra-value manufacturing industries. Therefore, in this study, we firstly try to understand the technical characteristics and patent layout of computer cooling fan through the design and analysis of its patent map, so that we can establish a technology development strategy for computer cooling fans. Secondly, forward and reverse engineering and experimental measurement are utilized to reconstruction generate the three-dimensional blade for the cooling fan. They can be transformed into NC code by a CAD/CAM system and accelerate the CNC manufacture for a prototype. Besides, to ensure the reliability of experiments, we carry out the performance tests according to the AMCA 210-85 test chamber, and obtain the performance curves of flow rate, static pressure and efficiency for the cooling fan. Furthermore, we try to discuss the transformation of fans during the course from the mould development to the plastic ejection by the CAE analysis software and Taguchi method. Besides, most of the industrial designers base their designs on a black box pattern. Attentions were paid to the development of the appearance, but factors like component relationship, assembly efficiency, and manufacture procedures may be ignored. As a result, we propose a mechanical component design method (MCDM) and list its rules here. It is explained by practical design cases, in order to demonstrate the properties and applicability of the new method. Here are our conclusions: (1) making patent map and analysis on it is a good ways for understand up-to-date technologies and performance of the cooling fans. (2) Reverse engineering can not only accelerate the development, but also reduce the requirement for experiences. (3) A seal ring is added to the vane. It is shown that the seal effect in the medium section is better than that in the upper section. The difference is 24.98% for the flow rate and 10.68% for the static pressure. (4) From the impacts on warp of products, we find out the best parameter combinations and minimum production warp. (5) The shell of cooling fan is redesigned by MCDM, in order to get a new type and avoid patent infringement.