发明申请
- 专利标题： Cooling fan
- 专利标题（中）： 冷风扇
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申请号： US11953725申请日： 2007-12-10
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公开(公告)号： US20090081038A1公开(公告)日： 2009-03-26
- 发明人: Ching-Bai Hwang , Zhi-Hui Zhao , Jie Zhang
- 申请人： Ching-Bai Hwang , Zhi-Hui Zhao , Jie Zhang
- 申请人地址： CN Shenzhen City
- 专利权人： Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.
- 当前专利权人： Fu Zhun Precision Industry (Shen Zhen) Co., Ltd.
- 当前专利权人地址： CN Shenzhen City
- 优先权： CN200710077336.8 20070921
- 主分类号： F04D29/54
- IPC分类号： F04D29/54
摘要：
A cooling fan includes a frame (100) and an impeller (200) with blades (240) disposed in the frame (100). The frame (100) has a base (140) and a sidewall (160) extending from a periphery of the base (140) with an air outlet (180) defined therein. The base (140) has an air inlet (142) and a vent hole (148) defined therein. The vent hole (148) is near the air outlet (180) and between tip portions of the blades (240) and the sidewall (160). In a preferred embodiment, the base (140) has a supporting portion (144) disposed in the air inlet (142). Two ribs (146) extend from a periphery of the supporting portion (144) towards the base (140). One of the ribs (146) is arranged adjacent to the air outlet (180) and has a changeable width which is gradually increased along a direction from the supporting portion (144) to the base (140).
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