Portable fan and fan assembly

Abstract

A portable fan includes a first main body portion, a first power supply assembly, and a first fan assembly. The first main body portion is arc-shaped and includes an external first air guide path and a first mounting chamber arranged in the first main body portion. The first air guide path includes a first recessed surface outside the first mounting chamber. The first power supply assembly is arranged in the first mounting chamber. The first fan assembly is configured to blow air towards the first air guide path. The first recessed surface is configured to guide the air from the first fan assembly towards a side of the first main body portion. The first fan assembly includes a first motor and a first fan blade mounted on an output shaft of the first motor, and the first motor is electrically connected to the first power supply assembly.

What is claimed is: 
     
         1 . A portable fan, comprising:
 a first main body portion, being arc-shaped and comprising an external first air guide path and a first mounting chamber arranged in the first main body portion, wherein the first air guide path comprises a first recessed surface outside the first mounting chamber;   a first power supply assembly, arranged in the first mounting chamber; and   a first fan assembly, arranged at a side of the first main body portion and configured to blow air towards the first air guide path, the first recessed surface is configured to guide the air from the first fan assembly towards a side of the first main body portion, the first fan assembly comprises a first motor and a first fan blade mounted on an output shaft of the first motor, and the first motor is electrically connected to the first power supply assembly.   
     
     
         2 . The portable fan according to  claim 1 , wherein the first fan blade comprises a turbine fan blade, the first mounting chamber and the first recessed surface are positioned on two opposite sides of the first main body portion along a first direction, the output shaft of the first motor is arranged along the first direction, and the turbine fan blade is configured to guide air from at least one side of the first main body portion in the first direction towards the first recessed surface. 
     
     
         3 . The portable fan according to  claim 1 , wherein the portable fan is configured to be connected to another portable fan through a connection member, the portable fan, the connection member, and said another portable fan form a neck fan configured to be hang on a human neck, and the portable fan and said another portable fan are configured to be placed on two opposite sides of the human neck; the connection member comprises a flexible connection portion with at least one installation hole, the at least one installation hole is configured to sleeve on a first connection end of the portable fan and a second connection end of said portable fan; the at least one installation hole is an installation through hole arranged along an extending direction of the flexible connection portion and configured to sleeve on the first connection end and the second connection end; and the portable fan and said another portable fan each has an independent switch configured to independently control power on and power off of the portable fan and said another portable fan. 
     
     
         4 . The portable fan according to  claim 1 , wherein the first fan assembly further comprises a first fan shell, a first motor and a first fan blade arranged on the first fan shell; wherein the first fan shell comprises a shell main body and an air outlet hood arranged on a side of the shell main body, the air outlet hood comprises a plurality of air guiding plates and an annular wall structure around the a plurality of air guiding plates, and the plurality of air guiding plates define a plurality of air outlet holes;
 wherein the shell main body comprises a sidewall structure, a mounting part positioned at one end inside the sidewall structure, and an air guiding part connected between the mounting part and the sidewall structure; the air guiding part comprises a plurality of air guiding blades arranged at intervals and configured to guide wind from the first fan blade to the air outlet hood, the first fan blade and the first motor are arranged in the sidewall structure and is positioned on a side of the mounting part opposite to the air outlet hood, and the first motor is arranged on the mounting part and is electrically connected to the first power supply assembly.   
     
     
         5 . The portable fan according to  claim 4 , wherein an inner side surface of the annular wall structure is an inclined surface or an arc-shaped surface, so that an inner diameter of the annular wall structure gradually decreases along a direction from the shell main body to the air outlet hood. 
     
     
         6 . The portable fan according to  claim 4 , wherein a blind hole is arranged on the mounting part facing the first motor, an opening of the blind hole a side of the mounting part where the first motor is mounted, and the blind hole is configured to store lubricating oil required for rotation of the output shaft of the first motor. 
     
     
         7 . The portable fan according to  claim 4 , wherein the mounting part comprises a mounting plate and a mounting post connected to the mounting plate facing the first motor, the blind hole is arranged on the mounting post; the first motor comprises a motor mounting hole configured to sleeve on the mounting post to have the first motor to be mounted on the mounting post. 
     
     
         8 . The portable fan according to  claim 7 , wherein a fixed post with a through-hole and a retaining ring are arranged in the blind hole, the output shaft of the first motor is configured to pass through the fixed post and the retaining ring to have a retaining portion of the output shaft positioned on a side of the retaining ring opposite to the fixed post; the output shaft comprises a main body connected to the fan blade and the retaining portion connected to the main body; the retaining portion comprises a rod portion and a retaining end connected to an end of the rod portion opposite to the fan blade, a diameter of the retaining end gradually decreases in a direction away from the fan blades; an outer surface of the rod portion along with the retaining end and the main body forms a retaining groove, the retaining ring has a retaining hole, a diameter of the retaining hole is larger than that of the rod portion but smaller than that of the main body and the retaining end, thereby retaining the retaining ring in the retaining groove; the retaining ring is an elastic spring piece capable of stretching and compressing along an extension direction of the output shaft. 
     
     
         9 . The portable fan according to  claim 4 , wherein the air outlet hood further comprises a mounting structure connected to the plurality of air guiding plates; the mounting structure comprises an annular mounting wall and a cover plate connected to the annular mounting wall; the mounting structure further comprises a mounting column connected to an inner side of the cover plate; the mounting column is detachably connected to the shell main body; the mounting structure is provided with a first alignment structure, the mounting part is provided with a second alignment structure, and cooperation of the first alignment structure and the second alignment structure achieve alignment and assembly of the shell main body and the air outlet hood. 
     
     
         10 . The portable fan according to  claim 4 , wherein the shell main body is provided with an opening configured to allow a wire to pass therethrough to extend into the first main body portion to be electrically connected to the first power supply assembly. 
     
     
         11 . The portable fan according to  claim 4 , wherein the first fan shell further comprises a metal grille arranged on a side of the sidewall structure opposite to the air outlet hood, the metal grille defines a plurality of air inlet holes, each air inlet hole has an inner diameter ranging from 0.5 mm to 4 mm; each air inlet hole is in a shape of a regular hexagon, a surrounding wall is arranged between two adjacent air inlet holes and a width of the surrounding wall ranges from 0.05 mm to 2 mm. 
     
     
         12 . The portable fan according to  claim 11 , wherein the first fan shell further comprises an air inlet cover, the metal grille is arranged at an inner side of the air inlet cover; the air inlet cover is arranged on a side of the shell main body opposite to the air outlet hood, the air inlet cover is annular and configured to sleeve on an end of the shell main body; the end of the shell main body is provided with a stepped groove, and the air inlet cover is configured to sleeve on the stepped groove; an outer surface of the air inlet cover is flush with an outer side surface of the shell main body; the first fan assembly is a direct-blowing fan assembly with air intake and exhaust on a same axis, the metal grille, the first fan blade, the first motor, the shell main body, and the air outlet hood are arranged along a straight line. 
     
     
         13 . The portable fan according to  claim 1 , further comprising a first outer cover, the first mounting chamber has an opening, the first outer cover is configured to detachably cover the opening; an inner side of the first outer cover is provided with at least one first snap-fit member, an outer side of the first main body portion is provided with at least one second snap-fit member, and cooperation of the at least one first snap-fit member and the at least one second snap-fit member achieves assembly of the first outer cover and the first main body portion. 
     
     
         14 . The portable fan according to  claim 1 , wherein the first fan assembly is arranged on an inner side of the first main body portion; a plurality of first engaging element is arranged at an inner side of the first main body portion, and a plurality of second engaging element is arranged on an outer side of the first fan assembly and is configured to be engaged with the first engaging element. 
     
     
         15 . A fan assembly, comprising
 a first fan shell;   a first motor; and   a first fan blade connected to the first motor;   wherein the first fan blade is arranged in the first fan shell; the first fan shell comprises a shell main body and an air outlet hood, the air outlet hood is positioned on a side of the shell main body and defines a plurality of air outlet holes; the air outlet hood comprises a plurality of air guiding plates and an annular wall structure connecting a periphery of the plurality of air guiding plates, the plurality of air outlet holes are defined among the plurality of air guiding plates; the shell main body comprises a circumferentially arranged sidewall structure, a mounting part arranged at an end in the sidewall structure, and an air guiding part connected between the mounting part and the sidewall structure; the air guiding part comprises a plurality of air guiding blades arranged at interval and configured to direct air from the first fan blade toward the air outlet hood, the first fan blade and the first motor are positioned in the sidewall structure and posited on a side of the mounting part opposite to the air outlet hood, and the first motor is mounted on the mounting part and is configured to be electrically connected with an external first power supply assembly.