Blower and vacuum cleaner

Abstract

A blower includes an impeller, a motor, and a housing. The impeller is able to rotate around a center axis extending vertically. The motor includes a rotor connected to the impeller and a stator facing the rotor in a radial direction. The housing accommodates at least a part of the motor. The housing includes a first housing part, a second housing part, and a rib. The first housing part is disposed on an outer side in the radial direction of the stator and a radial inner surface thereof forms a flow passage. The second housing part is disposed on an inner side in the radial direction of the first housing part. The rib connects the first housing part and the second housing part. A bottom surface of the rib includes a bottom-surface first area that extends downward toward a front side in a rotational direction of the impeller.

What is claimed is: 
     
         1 . A blower comprising:
 an impeller that is able to rotate around a center axis extending vertically;   a motor that includes a rotor connected to the impeller and a stator facing the rotor in a radial direction; and   a housing that accommodates at least a part of the motor,   wherein the housing includes
 a first housing part that is disposed on an outer side in the radial direction of the stator, a radial inner surface thereof forming a flow passage, 
 a second housing part that is disposed on an inner side in the radial direction of the first housing part, and 
 a rib that connects the first housing part and the second housing part, and 
   wherein a bottom surface of the rib includes a bottom-surface first area that extends downward toward a front side in a rotational direction of the impeller.   
     
     
         2 . The blower according to  claim 1 , wherein at least a part of a top surface of the rib extends downward toward the front side in the rotational direction of the impeller. 
     
     
         3 . The blower according to  claim 1 , wherein at least a part of a top surface of the rib extends downward toward an outer side in the radial direction. 
     
     
         4 . The blower according to  claim 1 , wherein the bottom surface of the rib includes a bottom-surface second area on the front side of the bottom-surface first area in the rotational direction of the impeller, and the bottom-surface second area extends upward toward the front side in the rotational direction of the impeller. 
     
     
         5 . The blower according to  claim 4 , wherein a distance in the axial direction between an upper end and a lower end of the bottom-surface first area is greater than a distance in the axial direction between an upper end and a lower end of the bottom-surface second area. 
     
     
         6 . The blower according to  claim 1 , wherein at least a part of the bottom surface of the rib extends downward toward an outer side in the radial direction. 
     
     
         7 . The blower according to  claim 1 , further comprising a plurality of stationary vanes that is arranged in the circumferential direction above the rib. 
     
     
         8 . The blower according to  claim 1 , wherein the first housing part, the second housing part, and the rib are formed of a single member. 
     
     
         9 . The blower according to  claim 1 , wherein a rib recessed part that is recessed upward in the axial direction is provided on the bottom surface of the rib and on the inner side of the bottom-surface first area in the radial direction, and
 wherein the stator and the rib are fixed by a fixing member of which a part is disposed in the rib recessed part.   
     
     
         10 . The blower according to  claim 1 , wherein a rib-penetrating hole that extends in the axial direction is provided in the rib. 
     
     
         11 . The blower according to  claim 1 , wherein the stator includes
 a stator core, and   an insulator that covers at least a part of the stator core,   wherein the insulator includes
 a first insulator wall part that extends in a direction crossing the circumferential direction, and 
 a second insulator wall part that faces the first insulator wall part in the circumferential direction, and 
   wherein the rib is disposed between the first insulator wall part and the second insulator wall part in the circumferential direction.   
     
     
         12 . The blower according to  claim 1 , wherein the rib includes
 a first radial inner end surface, and   a second radial inner end surface that is disposed on an outer side of the first radial inner end surface in the radial direction below the first radial inner end surface,   wherein the bottom surface of the rib includes a bottom-surface third area that connects the first radial inner end surface and the second radial inner end surface on an inner side of the bottom-surface first area in the radial direction, and   wherein at least a part of the bottom-surface third area is in contact with a top surface of the stator core.   
     
     
         13 . The blower according to  claim 1 , wherein the stator includes a stator core in which a core recessed part which is recessed inward in the radial direction on a radial outer surface thereof is provided, and
 wherein a part of the rib is inserted into the core recessed part.   
     
     
         14 . A vacuum cleaner comprising the blower according to  claim 1 .