| CPC F04D 25/08 (2013.01) [F04D 25/0673 (2013.01); F04D 29/522 (2013.01)] | 10 Claims |
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1. A high-speed neck fan, comprising a hanging piece (1) and a fan body (2) connected to an end portion of the hanging piece (1), wherein the fan body (2) comprises a shell (22); an air duct (221) and a coordination base (222) are formed on the shell (22); the coordination base (222) is connected to one side of a periphery of the air duct (221); the air duct and the coordination base are in a stacked state on a radial cross section of the air duct; one end of the air duct (221) is an air inlet (223), and the other end is an air outlet (224); an air-driving fan blade group (23) is arranged in the air duct (221); and the air-driving fan blade group (23) guides an air flow located at the air inlet (223) to pass through the air duct (221) and then be blown out from the air outlet (224) in an accelerated manner;
wherein a motor base (241) is coaxially arranged in the air duct (221); a portion of a circumferential wall surface of the motor base (241) extends towards an inner wall of the air duct (221) to form booster blades (242); the booster blades (242) are arranged on one side of the air-driving fan blade group (23) facing the air outlet (224); the air-driving fan blade group (23) comprises a rotating seat (231) and air-driving blades (232) uniformly arranged on a peripheral wall surface of the rotating seat (231); rectifier blades (254) are arranged on sides of the booster blades (242) away from the air-driving fan blade group (23); the booster blades (242) achieves air-cutting boosting on an air flow conveyed by the air-driving blades (232); and the rectifier blades (254) guide the boosted air flow output from the booster blades (242), so that the boosted air flow is blown outwards in a direction parallel to an axial direction of the air outlet (224);
wherein a surface of each of the booster blades (242) facing an outer side of the air outlet (224) is a windward surface (243), and a surface of one side of each of the air-driving blades (232) facing the booster blade (242) is an air-driving surface (233); in a rotation process of the air-driving fan blade group (23), the air-driving surfaces (233) rotate towards the windward surfaces (243); in the same radial area, a curved surface where the windward surface (243) is located is intersected with a curved surface where the air-driving surface (233) is located; and an angle between the windward surface (243) and the air-driving surface (233) is θ1<90°.
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