Invention Grant
- Patent Title: Fan unit and electronic apparatus and method of controlling the same
- Patent Title (中): 风扇单元及电子设备及其控制方法
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Application No.: US12230995Application Date: 2008-09-09
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Publication No.: US07930071B2Publication Date: 2011-04-19
- Inventor: Masatoshi Nishizawa , Tomoki Harada , Goro Nakagai , Toyohiro Kato
- Applicant: Masatoshi Nishizawa , Tomoki Harada , Goro Nakagai , Toyohiro Kato
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Main IPC: G05D13/00
- IPC: G05D13/00
Abstract:
The inventors have revealed that the actual rotation speed of the rotor in a fan structured as a centrifugal fan exceeds the designated rotation speed if the ventilation opening of the centrifugal fan is occluded. If a larger amount of dust accumulates at the ventilation opening of the centrifugal fan, for example, the actual rotation speed of the rotor in the centrifugal fan exceeds the designated rotation speed by a predetermined deviation. The accumulation of dust at the ventilation opening can in this manner be observed in a facilitated manner. The occlusion of the ventilation opening can thus be detected.
Public/Granted literature
- US20090009967A1 Fan unit and electronic apparatus and method of controlling the same Public/Granted day:2009-01-08
Information query
