Fan and electronic device equipped with the same

A fan comprising:

• an impeller having a plurality of propeller-shaped blades;
• a motor configured to rotate the impeller;
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end;
• and
• an air flow guiding plate partially blocking an opening on the second end of the air duct,
• wherein the blades are closer to the air flow guiding plate than the air duct,
• the air flow guiding plate has an inclined inner edge portion which inclines to approach a rotation axis of the impeller as the air flow guiding plate separates from an exhaust side of the blades in a rotation axis direction of the impeller,
• a chamfered portion which inclines corresponding to an inclination of the inclined inner edge portion is disposed on the blades in a position facing an inner surface of the inclined inner edge portion, and
• the air flow guiding plate and the blades are disposed such that a gap between the air flow guiding plate and the blades is smallest between the inclined inner edge portion and the chamfered portion.

A fan comprising:

• an impeller having a plurality of propeller-shaped blades;
• a motor configured to rotate the impeller;
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end;
• and
• an air flow guiding plate partially blocking an opening on the second end of the air duct, wherein
• the blades are closer to the air flow guiding plate than the air duct,
• the impeller has a substantially cylindrical hub, the blades being attached on a side surface of the hub, and
• a portion of the impeller on an exhaust outlet side further comprises a disc attached centered on a rotation axis of the impeller, a diameter of the disc being larger than an outer diameter of the hub and smaller than an outermost diameter of the rotation trajectory of the blades.

An electronic device comprising:

• a first wall which is an outer wall of the electronic device;
• a second wall facing the first wall;
• a fan disposed inside the first wall and having an exhaust portion, the exhaust portion of the fan being disposed adjacent the first wall, and a suction portion of the fan being disposed adjacent the second wall;
• and
• a circuit board arranged so as to be cooled by the fan, and being disposed laterally to a clearance between the second wall and the suction portion of the fan,
• wherein the fan comprises
• an impeller having a plurality of propeller-shaped blades,
• a motor configured to rotate the impeller,
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end,
• an air flow guiding plate partially blocking an opening on the second end of the air duct,
• a motor-base configured to support the motor, and
• a plurality of connecting strips configured to connect and fix the motor-base to the air flow guiding plate, and wherein
• the motor-base and the connecting strips are disposed on a suction inlet side of the fan.

An electronic device comprising:

• a first wall which is an outer wall of the electronic device;
• a second wall facing the first wall;
• a fan disposed inside the first wall and having an exhaust portion, the exhaust portion of the fan being disposed adjacent the first wall, and a suction portion of the fan being disposed adjacent the second wall;
• and
• a circuit board arranged so as to be cooled by the fan, and being disposed lateral to a clearance between the second wall and the suction portion of the fan,
• the fan comprising
• an impeller having a plurality of propeller-shaped blades,
• a motor configured to rotate the impeller,
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end, and
• an air flow guiding plate partially blocking an opening disposed on the second end of the air duct, the air flow guiding plate having an inclined inner edge portion which inclines to approach a rotation axis of the impeller as the air flow guiding plate separates from an exhaust side of the blades in a rotation axis direction of the impeller, wherein
• the fan is configured to inhale heat from the circuit board via an outer side of the inclined air flow guiding plate.

An electronic device comprising:

• a first wall which is an outer wall of the electronic device;
• a second wall facing the first wall;
• a fan disposed inside the first wall, and having an exhaust portion, the exhaust portion of the fan being disposed adjacent the first wall, and a suction portion of the fan being disposed adjacent the second wall;
• and
• a circuit board arranged so as to be cooled by the fan, and being disposed lateral to a clearance between the second wall and the suction portion of the fan,
• the fan comprising
• an impeller having a plurality of propeller-shaped blades,
• a motor configured to rotate the impeller,
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end, and
• an air flow guiding plate partially blocking an opening on the second end of the air duct, wherein
• the fan is configured to inhale heat from the circuit board via an outer side of the inclined air flow guiding plate.

A fan comprising:

• an impeller having a plurality of propeller-shaped blades,
• a motor configured to rotate the impeller,
• an air duct having a first end, a second end, and an exhaust outlet, the exhaust outlet being larger than an outer diameter of a rotation trajectory of the blades of the impeller on the first end, the air duct having an inclined inner edge portion which inclines to approach a rotation axis of the impeller as the air duct separates from an exhaust side of the fan, and
• an air flow guiding plate partially blocking an opening on the second end of the air duct, wherein
• the fan is configured to guide air in an outer surface side of the air duct to a suction portion of the fan via an outer surface of the air flow guiding plate.