Data processing: generic control systems or specific application – Specific application – apparatus or process – Specific application of speed responsive control system
Reexamination Certificate
2011-04-19
2011-04-19
Decady, Albert (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Specific application of speed responsive control system
Reexamination Certificate
active
07930071
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.
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Harada Tomoki
Kato Toyohiro
Nakagai Goro
Nishizawa Masatoshi
De'cady Albert
Fujitsu Limited
Fujitsu Patent Center
Rapp Chad
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