Blower and vacuum cleaner

Abstract

A blower according to an exemplary embodiment of the present disclosure includes a rotor that has a shaft disposed extending vertically, a stator positioned at an outer side of the rotor in a radial direction, a cylindrical housing extending in the axial direction and accommodating the rotor and the stator, and an impeller attached to the shaft, at an upper side from the stator. The stator includes a ring-shaped core back portion, plurality of teeth portions extending from the core back portion toward an inner side in the radial direction, an insulator that covers at least part of the teeth portions, a coil wound on each of the teeth portions via the insulator, and a flow path forming member of which at least part is positioned further at an inner side in the radial direction than the core back portion. The housing has a through hole that opens to the inner side. The flow path forming member connects part of the insulator or the coil at one side in the circumferential direction and part of the insulator or the coil at another side in the circumferential direction, and forms a flow path that passes further at an inner side in the radial direction than the core back portion. The flow path connects to the through hole of the housing.

1 - 12 . (canceled) 
     
     
         13 . A blower, comprising:
 a rotor that has a shaft disposed following a central axis extending vertically;   a stator positioned at an outer side of the rotor in a radial direction;   a cylindrical housing extending in the axial direction, that accommodates the rotor and the stator; and   an impeller attached to the shaft, at an upper side from the stator;   wherein the stator includes
 a ring-shaped core back portion, 
 a plurality of teeth portions extending from the core back portion toward an inner side in the radial direction, 
 an insulator that covers at least part of the teeth portions, 
 a coil wound on each of the teeth portions via the insulator, and 
 a flow path forming member of which at least part is positioned further at an inner side in the radial direction than the core back portion, 
   wherein the housing has a through hole that opens to the inner side,   wherein the flow path forming member connects part of the insulator or the coil at one side in the circumferential direction and part of the insulator or the coil at another side in the circumferential direction, and forms a flow path that passes further at an inner side in the radial direction than the core back portion,   and wherein the flow path connects to the through hole of the housing.   
     
     
         14 . The blower according to  claim 13 , wherein at least part of an inner side face of the core back portion in the radial direction is exposed to the flow path. 
     
     
         15 . The blower according to  claim 13 ,
 wherein the flow path forming member has
 an upper opening that opens to an upper side of the core back portion, and 
 a lower opening that opens to a lower side of the core back portion, 
   and wherein the flow path connects the upper opening and the lower opening.   
     
     
         16 . The blower according to  claim 13 ,
 wherein the flow path forming member covers the coil.   
     
     
         17 . The blower according to  claim 15 ,
 wherein the lower opening opens toward a lower side in the axial direction.   
     
     
         18 . The blower according to  claim 17 ,
 wherein the upper opening opens toward an upper side in the axial direction.   
     
     
         19 . The blower according to  claim 17 ,
 wherein the upper opening opens toward the outer side in the radial direction.   
     
     
         20 . The blower according to  claim 19 ,
 wherein the flow path forming member has an inclined face that is positioned progressively further at a forward side in rotational direction of the impeller as to the radial direction, the further toward the inner side in the radial direction of the upper opening.   
     
     
         21 . The blower according to  claim 13 ,
 wherein the flow path forming member is a hollow member positioned between the coils arrayed in the circumferential direction.   
     
     
         22 . The blower according to  claim 13 ,
 wherein the flow path forming member has a tapered portion where a flow path cross-sectional area progressively increases from the upper side toward the lower side.   
     
     
         23 . The blower according to  claim 13 ,
 wherein the flow path forming member has
 a first tapered portion where the flow path cross-sectional area progressively decreases from the upper side toward the lower side, and 
 a second tapered portion, positioned at the lower side of the first tapered portion, where a flow path cross-sectional area progressively increases from the upper side toward the lower side. 
   
     
     
         24 . A vacuum cleaner, comprising the blower according to  claim 13 .