Blower device and cleaner

Abstract

A blower device includes an impeller that is rotatable around a rotary shaft extending in an up-down direction; a motor that rotationally drives the impeller; a motor housing accommodating the motor; a cylindrical member disposed outwardly of the housing in a radial direction; and an impeller case accommodating the impeller. A gap is formed between the housing and the cylindrical member. Stationary blades are provided on one of the outer side surface of the housing and the inner side surface of the cylindrical member, and protrude towards the other side surface. At an outer portion of the housing in the radial direction, the blades are disposed side by side in a circumferential direction, and form air-current paths. At least one of the blades includes a protrusion that protrudes from a surface of the at least one of the blades facing the radial direction and contacts the other side surface.

1 . A blower device comprising:
 an impeller that is rotatable around a rotary shaft as a center, the rotary shaft extending in an up-down direction;   a motor that rotationally drives the impeller;   a motor housing that accommodates the motor therein;   a cylindrical member that is disposed outwardly of the motor housing in a radial direction; and   an impeller case that accommodates the impeller,   wherein a gap is formed between an outer side surface of the motor housing and an inner side surface of the cylindrical member,   wherein a plurality of stationary blades are provided on one of side surfaces, that is, one of the outer side surface of the motor housing and the inner side surface of the cylindrical member, the plurality of stationary blades protruding towards the other side surface,   wherein, at an outer portion of the motor housing in the radial direction, the plurality of stationary blades are disposed side by side in a circumferential direction, and form a plurality of air-current paths, and   wherein at least one of the plurality of stationary blades includes a protrusion that protrudes from a surface of the at least one of the plurality of stationary blades that in the radial direction faces the other side surface and contacts the other side surface.   
     
     
         2 . The blower device according to  claim 1 , wherein the protrusion extends downward from an upper side along the paths. 
     
     
         3 . The blower device according to  claim 2 , wherein the protrusion contacts at a surface thereof the other side surface. 
     
     
         4 . The blower device according to  claim 1 , wherein a first width of an upper end of the gap in the radial direction is larger than a second width in the radial direction at which a width in the radial direction at the paths becomes smallest. 
     
     
         5 . The blower device according to  claim 4 , wherein a third width in the radial direction at which a width of the gap in the radial direction becomes largest at a location below lower ends of the stationary blades in an axial direction is larger than the second width in the radial direction. 
     
     
         6 . The blower device according to  claim 1 , wherein an upper end portion of each stationary blade is curved towards a back in a rotation direction of the impeller. 
     
     
         7 . The blower device according to  claim 1 , wherein the protrusion includes a first rib that in a rotation direction of the impeller is positioned forwardly of a center of the at least one of the plurality of stationary blades in the circumferential direction. 
     
     
         8 . The blower device according to  claim 7 , wherein the first rib is positioned at an edge of the at least one of the plurality of stationary blades that is located at a front side in the rotation direction of the impeller. 
     
     
         9 . The blower device according to  claim 7 , wherein the protrusion further includes a second rib that extends upward in an axial direction from a lower end of the at least one of the plurality of stationary blades and that is connected to the first rib. 
     
     
         10 . The blower device according to  claim 9 , wherein, in the circumferential direction, a portion between the first rib and the second rib is filled with an adhesive. 
     
     
         11 . The blower device according to  claim 1 , wherein the protrusion includes a third rib that in a rotation direction of the impeller is positioned backwardly of a center of the at least one of the plurality of stationary blades in the circumferential direction. 
     
     
         12 . The blower device according to  claim 11 , wherein the third rib is positioned at an edge of the at least one of the plurality of stationary blades that is located at a back side in the rotation direction of the impeller. 
     
     
         13 . The blower device according to  claim 1 , wherein a holding portion that holds a lower end of each stationary blade is provided on the other side surface. 
     
     
         14 . A cleaner comprising:
 the blower device according to  claim 1 .