Portable fan

Abstract

A portable fan includes a shell, a mix-flow fan, arranged inside the shell and configured to rotate around a rotation shaft to generate wind, and a booster, arranged inside the shell. The booster surrounds a circumference of the mix-flow fan. A first air channel is defined between the mix-flow fan and the booster.

What is claimed is: 
     
         1 . A portable fan, comprising:
 a shell;   a mix-flow fan, arranged inside the shell and configured to rotate around a rotation shaft to generate wind;   a booster, arranged inside the shell, wherein, the booster surrounds a circumference of the mix-flow fan;   wherein, a first air channel is defined between the mix-flow fan and the booster.   
     
     
         2 . The portable fan according to  claim 1 , wherein, the booster is connected to the shell and has a pressurizing surface that faces the mix-flow fan;
 the shell comprises an air inlet portion and an outlet portion opposite to the air inlet portion;   for at least a portion of the pressurizing surface, a diameter of the pressurizing surface is increased along a direction extending from the air inlet portion to the air inlet portion.   
     
     
         3 . The portable fan according to  claim 2 , wherein, at least a portion of the pressurizing surface is protruding away from the mix-flow fan to increase a size of the first air channel to concentrate the wind. 
     
     
         4 . The portable fan according to  claim 1 , wherein the shell comprises an air inlet portion and an outlet portion opposite to the air inlet portion, an end of the booster near the air outlet portion flushes with an end of the mix-flow fan near the air outlet portion. 
     
     
         5 . The portable fan according to  claim 4 , further comprising a pressurizing member arranged inside the shell and disposed between the air outlet portion and the mix-flow fan,
 wherein, a step is formed by the booster and the shell to enable the pressurized wind generated by the mix-flow fan to flow to reach the pressurizing member.   
     
     
         6 . The portable fan according to  claim 1 , wherein, the booster comprises a booster seat and a plurality of third blades arranged on an outer peripheral surface of the booster seat; at least a portion of each of the plurality of third blades is connected to at least the shell; a gap is formed between the shell and the booster seat. 
     
     
         7 . The portable fan according to  claim 1 , further comprising a support connected to the shell,
 wherein, the support is configured to be hand-held by a user; or   the support is configured to clamp a wall to hold the portable fan; or   the support is bendable and fixed at a bending position; or   the support is configured to be supported on a desktop; or   the support is extendable and retractable and is configured to stand on a floor.   
     
     
         8 . A portable fan, comprising:
 a shell;   a booster, arranged inside the shell,   wherein, the booster has a first pressurizing surface; in a radial direction of the booster, at least a portion of the first pressurizing surface is protruding towards the shell.   
     
     
         9 . The portable fan according to  claim 8 , further comprising a mix-flow fan arranged inside the shell and configured to generate wind;
 wherein, a first air channel is defined between the mix-flow fan and the booster to concentrate the wind generated by the mix-flow fan.   
     
     
         10 . The portable fan according to  claim 9 , wherein, the shell comprises an air inlet portion and an outlet portion opposite to the air inlet portion; along a direction extending from the air inlet portion to the air outlet portion, a diameter of the booster is increased. 
     
     
         11 . The portable fan according to  claim 9 , further comprising a pressurizing member arranged inside the shell and disposed between the air outlet portion and the mix-flow fan,
 wherein, the pressurizing member has a second pressurizing surface, a second air channel is formed between the second pressurizing surface and the shell and is communicated with the first air channel.   
     
     
         12 . The portable fan according to  claim 11 , wherein, a diameter of a side of the pressurizing member near the mix-flow fan is less than a diameter of the other side of the pressurizing member near the air outlet portion. 
     
     
         13 . The portable fan according to  claim 12 , wherein, a size of an end of the second air channel near the first air channel is greater than a size of the other end of the second air channel near the air outlet portion. 
     
     
         14 . The portable fan according to  claim 9 , wherein, the booster is connected to the shell and surrounds a circumference of the mix-flow fan. 
     
     
         15 . A portable fan, comprising:
 a shell; and   a booster, arranged inside the shell; wherein, the booster comprises a booster seat and a plurality of third blades arranged on an outer peripheral surface of the booster seat; at least a portion of each of the plurality of third blades is connected to at least the shell; a gap is defined between the booster seat and the shell; and/or   a pressurizing member, wherein an end of the pressurizing member near the air outlet portion is arranged with a front cover, a surface of the front cover facing the air outlet portion is recessed towards an interior of the shell to form a recessed surface.   
     
     
         16 . The portable fan according to  claim 15 , further comprising a mix-flow fan arranged inside the shell and configured to generate wind;
 wherein, the shell comprises an air inlet portion and an outlet portion opposite to the air inlet portion; the mix-flow fan is connected to the other end of the pressurizing member near the air inlet portion.   
     
     
         17 . The portable fan according to  claim 16 , wherein, the front cover comprises an edge portion and a middle portion, the surface of the front cover facing the air outlet portion is a surface of the middle portion, the edge portion of the front cover is extending approaching an edge of the shell; and a negative pressure zone is formed in the middle portion. 
     
     
         18 . The portable fan according to  claim 17 , wherein, the air outlet portion is formed between the edge portion of the front cover and the edge of the shell and is configured to output the wind. 
     
     
         19 . The portable fan according to  claim 18 , wherein, the wind is capable of flowing towards the negative pressure zone. 
     
     
         20 . The portable fan according to  claim 15 , wherein, a diameter of a side of the pressurizing member near the mix-flow fan is less than a diameter of the other side of the pressurizing member near the air outlet portion.