EXTERNAL ROTOR BRUSHLESS DC MOTOR DRIVEN EXHAUST FAN
First Claim
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1. An external rotor brushless DC motor driven exhaust fan, comprising:
- a housing defined with an axial inner space with its open side facing downward and a vent located above the inner space, in a predetermined portion of the housing being formed an exhaust hole in communication with the vent;
a cover detachably assembled to the open side of the housing for sealing the open side of the housing, in each side of a rectangular guiding frame of the cover being defined an air guiding hole;
an external rotor brushless DC motor disposed at the vent and provided with a turbo fan;
a LED illumination device disposed in a space defined between the housing and the cover and electrically connected to the external rotor brushless DC motor;
when the external rotor brushless DC motor is turned on, it will rotate the turbo fan so as to suck air of room via the air guiding hole and then discharge it out of the room, meanwhile, the LED illumination device is turned on to illuminate the room.
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Abstract
An external rotor brushless DC motor driven exhaust fan is provided with an external rotor brushless DC motor and a LED illumination device in its inner space. The uses of the external rotor brushless DC motor and the low voltage driven LED illumination device enable the exhaust fan to have the functions of air exhausting and illumination, and to reduce the power consumption and noise. On top of that, the reduction in power consumption of the external rotor brushless DC motor can lower the carbon emission of the exhaust fan, so the exhaust fan is not only environmentally friendly but also energy saving.
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Citations
10 Claims
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1. An external rotor brushless DC motor driven exhaust fan, comprising:
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a housing defined with an axial inner space with its open side facing downward and a vent located above the inner space, in a predetermined portion of the housing being formed an exhaust hole in communication with the vent; a cover detachably assembled to the open side of the housing for sealing the open side of the housing, in each side of a rectangular guiding frame of the cover being defined an air guiding hole; an external rotor brushless DC motor disposed at the vent and provided with a turbo fan; a LED illumination device disposed in a space defined between the housing and the cover and electrically connected to the external rotor brushless DC motor; when the external rotor brushless DC motor is turned on, it will rotate the turbo fan so as to suck air of room via the air guiding hole and then discharge it out of the room, meanwhile, the LED illumination device is turned on to illuminate the room. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification