Device having an efficient heat radiation casing
AssigneeNEC Corporation
InventorTakashi Oyamada
Life of this patent
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Abstract
A communication device for use in a base station of a portable telephone system has a radiation section including a spiral projection formed on an external surface of a casing to define a spiral air passage on the casing, a fan disposed on the casing inside a central space of the spiral passage, and a motor disposed inside the casing to drive the fan through a shaft penetrating the wall of the casing. A spiral air flow generated by the fan functions for efficient heat radiation through the casing. The spiral projection is formed by drawing the wall of the casing.
Claims4
An apparatus comprising a casing having an external surface, a spiral projection formed on said external surface to form a spiral air passage on said external surface, said spiral air passage including a central space, an inner air inlet portion communicated with said central space and an outer air outlet portion for discharging air from the spiral air passage, and a fan disposed in said central space.
Dependencies are inferred from the claim text.