Blower

Abstract

A blower includes a housing having an air inlet; a motor; an axial fan, driven by the motor to rotate along a fan axis and generate air flow, and the axial fan comprising a hub and impeller; a blowing tube, comprising an air outlet for the air exiting; and a duct, comprising a guiding cone which is located between the axial fan and the air outlet, and used for guiding the air flow generated by the axial fan to move to the air outlet, wherein a size of the motor is configured in a manner that the motor cannot be contained in the guiding cone, the housing and the blowing tube are internally provided with an air passage, the motor is completely contained in the air passage of the housing, and the motor and the duct are located on two opposite sides of the axial fan.

What is claimed is: 
     
         1 . A blower, comprising:
 a housing, comprising an air inlet for the air entering in;   a motor, used for providing rotating driving force;   an axial fan, driven by the motor to rotate along a fan axis and generate air flow, and the axial fan comprising a hub and impeller;   a blowing tube, comprising an air outlet for the air exiting; and   a duct, comprising a guiding cone which is located between the axial fan and the air outlet, and used for guiding the air flow generated by the axial fan to move to the air outlet,   wherein a size of the motor is configured in a manner that the motor cannot be contained in the guiding cone, the housing and the blowing tube are internally provided with an air passage, the motor is completely contained in the air passage of the housing, and the motor and the duct are located on two opposite sides of the axial fan.   
     
     
         2 . The blower according to  claim 1 , wherein the air moves into the air passage from the air inlet and is blown out from the air outlet, and is used for blowing away fallen leaves and trash on the ground, the motor is exposed in the air passage, and the air entering from the air inlet passes around the motor all the time, so as to achieve cooling on the motor. 
     
     
         3 . The blower according to  claim 1 , wherein a volume of the guiding cone is less than that of the motor. 
     
     
         4 . The blower according to  claim 1 , wherein a maximum cross section area of the motor in a direction perpendicular to the fan axis is greater than a maximum cross section area of the hub in the direction perpendicular to the fan axis. 
     
     
         5 . The blower according to  claim 1 , wherein in the direction perpendicular to the fan axis, the motor and the axial fan do not overlap with each other. 
     
     
         6 . The blower according to  claim 1 , wherein the air passage comprises an upstream area from the air inlet to the axial fan and a downstream area from the axial fan to the air outlet, a direction from the upstream area to the downstream area is defined as a longitudinal direction, and the motor, the axial fan and the duct are sequentially arranged in the longitudinal direction. 
     
     
         7 . The blower according to  claim 6 , wherein the duct is located in the downstream area, the duct further comprises a guiding housing containing the guiding cone and vanes located between the flow guiding cone and the guiding housing, the guiding housing, the motor and the axial fan are all contained in the housing, and the housing is configured to be assembled and connected with the blowing tube. 
     
     
         8 . The blower according to  claim 6 , wherein a moving direction of air flow formed due to rotation of impeller is an extending direction of the fan axis, and the fan axis extends in the longitudinal direction. 
     
     
         9 . The blower according to  claim 1 , wherein a gap for the airflow entering from the air inlet to flow is kept between the motor and the housing, the gap comprises an surrounding area around the motor and a transition area located between the surrounding area and the axial fan, the impeller of the axial fan rotates to form an annular rotating surface, the air passage comprises a plurality of air surfaces perpendicular to an air flow flowing direction, and a minimum area of an air area of the surrounding area in the longitudinal direction is greater than an area of the rotating surface. 
     
     
         10 . The blower according to  claim 9 , wherein a ratio of a cross section area of the air outlet in the direction perpendicular to the fan axis to the area of the rotating surface is within a range of 0.75-1.1. 
     
     
         11 . The blower according to  claim 1 , wherein a rotating speed of the motor is greater than 21,000 r/min, and is less than or equal to 50,000 r/min, and a diameter of the axial fan is less than 88 mm and greater than or equal to 50 mm. 
     
     
         12 . The blower according to  claim 11 , wherein a ratio of a diameter of the hub to the diameter of the axial fan is within a range of 0.1-0.7. 
     
     
         13 . The blower according to  claim 1 , wherein the blower further comprises a handle connected with the housing, the handle is provided with a grip portion for an operator to hold, the blowing tube extends longitudinally along a first axis, the grip portion extends longitudinally along a second axis, the first axis and the second axis define a first plane, a projection of a gravity center of the blower on a second plane is located within a range of a projection of the grip portion on the second plane, the second plane is parallel to the second axis, and perpendicular to the first plane, and a projection of the motor on the second plane and the projection of the grip portion on the second plane at least partially overlap with each other. 
     
     
         14 . The blower according to  claim 13 , wherein a projection of the axial fan on the second plane falls into a range of the projection of the grip portion on the second plane, and the gravity center of the blower is located between the axial fan and the motor. 
     
     
         15 . The blower according to  claim 1 , wherein the housing and the blowing tube are structures independent of each other. 
     
     
         16 . A blower, comprising:
 a housing, comprising an air inlet for the air entering in;   a motor, used for providing rotating driving force;   an axial fan, driven by the motor to rotate along a fan axis and generate air flow, and the axial fan comprising a hub and impeller;   a blowing tube, provided with an air outlet for airflow to be blown outwards; and   a duct configured to guiding the air flow to move to the air outlet;   wherein the motor is configured into an alternating current motor, the duct comprises a guiding cone and vanes located between the axial fan and the air outlet, the housing and the blowing tube are internally provided with an air passage, and the alternating current motor is wholly contained in the air passage of the housing, and is arranged on an outer side of the duct.   
     
     
         17 . The blower according to  claim 16 , wherein air enters the air passage from the air inlet and flows across a whole outer surface of the motor, so that the air is utilized for cooling the motor. 
     
     
         18 . The blower according to  claim 16 , wherein the duct further comprises a guiding housing containing the guiding cone, the guiding housing, the motor and the axial fan are all contained in the housing, and the housing is configured to be assembled and connected with the blowing tube. 
     
     
         19 . A blower, comprising:
 a housing, comprising an air inlet for the air entering in;   a motor, used for providing rotating driving force;   an axial fan, driven by the motor to rotate along a fan axis and generate air flow, and the axial fan comprising a hub and impeller;   a blowing tube, comprising an air outlet for the air exiting; and   a duct, comprising a guiding cone which is located between the axial fan and the air outlet, and used for guiding the air flow generated by the axial fan to move to the air outlet,   wherein the motor is wholly contained in the housing, the motor and the duct are located on two opposite sides of the axial fan, a maximum cross section area of the motor in a direction perpendicular to a fan axis is greater than a maximum cross section area of the guiding cone in the direction perpendicular to the fan axis.   
     
     
         20 . The blower according to  claim 19 , wherein air moves into an air passage from the air inlet and is blown out from the air outlet, and is used for blowing away fallen leaves and trash on the ground, the motor is exposed in the air passage, and the air entering from the air inlet passes around the motor all the time, so as to achieve cooling on the motor.