Blower

Abstract

A blower includes an impeller that is rotatable about a vertically extending central axis; a motor that drives the impeller; and a housing that accommodates the impeller and the motor. The impeller includes a plurality of vanes and a flange in which the plurality of vanes are provided. The housing includes a first housing unit that faces a vane one end surface located on an axial-direction one side of the vane with a gap interposed therebetween. The first housing unit includes an inlet port penetrating in the axial direction. One end surface of the flange located on one side in the axial direction of the flange includes a first flange end surface located on an inside in the radial direction of one end surface of the flange and a second flange located on an outside in the radial direction with respect to the first flange end surface.

1 . A blower comprising:
 an impeller that is rotatable about a vertically extending central axis;   a motor that drives the impeller; and   a housing that accommodates the impeller and the motor,   wherein   the impeller includes a plurality of vanes arranged in a circumferential direction and a flange in which the plurality of vanes are provided at an outer circumferential edge on an outside in a radial direction,   the housing includes a first housing unit that faces one end surface of the vane with a gap interposed between the first housing unit and the one end surface of the vane, the one end surface of the vane being located on one side in an axial direction of the vane,   the first housing unit includes an inlet port penetrating in the axial direction,   one end surface of the flange is located on one side in the axial direction of the flange and includes a first flange end surface located on an inside in the radial direction of the one end surface of the flange and a second flange end surface located on the outside in the radial direction with respect to the first flange end surface, and   the second flange end surface is inclined radially outward to one side in the axial direction with respect to a plane orthogonal to the central axis in sectional view from a circumferential direction.   
     
     
         2 . The blower according to  claim 1 , wherein the second flange end surface is located on the one side in the axial direction with respect to the first flange end surface. 
     
     
         3 . The blower according to  claim 1 , wherein the second flange end surface extends straight in sectional view from the circumferential direction. 
     
     
         4 . The blower according to  claim 1 , wherein
 the one end surface of the flange further includes a first flange connecting surface that connects an outer end on the outside in the radial direction of the first flange end surface and an inner end on the inside in the radial direction of the second flange end surface,   a tangential direction of the first flange connecting surface at the inner end on the inside in the radial direction is parallel to a tangential direction of the first flange end surface at an outer end on the outside in the radial direction in sectional view from the circumferential direction, and   tangential direction of the first flange connecting surface at the outer end on the outside in the radial direction is parallel to a tangential direction of the second flange end surface at the inner end on the inside in the radial direction in sectional view from the circumferential direction.   
     
     
         5 . The blower according to  claim 1 , wherein
 a second width in the radial direction of the second flange end surface is at least double a first width in the radial direction of the first flange end surface,   the first width is a length in the radial direction between the inner end on the inside in the radial direction of the first flange end surface and the outer end on the outside in the radial direction of the first flange end surface in sectional view from the circumferential direction, and   the second width is a distance in the radial direction between the inner end on the inside in the radial direction of the second flange end surface and the outer end on the outside in the radial direction of the second flange end surface in sectional view from the circumferential direction.   
     
     
         6 . The blower according to  claim 1 , wherein
 the one end surface of the flange further includes a third flange end surface located on the outside in the radial direction of the second flange end surface, and   the third flange end surface extends straight in sectional view from the circumferential direction.   
     
     
         7 . The blower according to  claim 6 , wherein
 one end surface of the flange further includes a second flange connecting surface that connects an outer end on the outside in the radial direction of the second flange end surface and an inner end on the inside in the radial direction of the third flange end surface,   a tangential direction of the second flange connecting surface at the inner end on the inside in the radial direction is parallel to a tangential direction of the second flange end surface at an outer end on the outside in the radial direction in sectional view from the circumferential direction, and   a tangential direction of the second flange connecting surface at the outer end on the outside in the radial direction is parallel to a tangential direction of the third flange end surface at the inner end on the inside in the radial direction in sectional view from the circumferential direction.   
     
     
         8 . The blower according to  claim 1 , wherein the second flange end surface forms an acute angle of less than 5 degrees with respect to the plane orthogonal to the central axis in sectional view from the circumferential direction. 
     
     
         9 . The blower according to  claim 1 , wherein
 the one end surface of the vane includes a first vane end surface located on the outside in the radial direction with respect to the inlet port,   the first vane end surface is inclined radially outward to one side in the axial direction with respect to the plane orthogonal to the central axis when viewed from the circumferential direction, and   the first housing unit further includes a first plate provided in parallel to the first vane end surface on one side in the axial direction with respect to the first vane end surface of each of the plurality of vanes.   
     
     
         10 . The blower according to  claim 9 , wherein
 the impeller further includes an annular ring portion that connects the plurality of vanes on at least one of the axial-direction one side and the other side of the vane, and   the first vane end surface is located on the outside in the radial direction with respect to the ring.   
     
     
         11 . The blower according to  claim 1 , wherein the housing further includes a second housing unit that faces the other end surface of the vane with a gap interposed between the second housing unit and the other end surface of the vane, the other end surface of the vane being located on the other side in the axial direction of the vane. 
     
     
         12 . The blower according to  claim 11 , wherein
 the lower end surface of the flange is located on the other side in the axial direction of the flange and includes a fourth flange end surface parallel to the first flange end surface in sectional view from the circumferential direction, a fifth flange end surface located on the outside in the radial direction with respect to the fourth flange end surface, and a sixth flange end surface located on the outside in the radial direction with respect to the fifth flange end surface, and   the fifth flange end surface is inclined radially outward to one side in the axial direction with respect to the plane orthogonal to the center axis in sectional view from the circumferential direction.   
     
     
         13 . The blower according to  claim 12 , wherein
 the lower end surface of the flange is further includes a third flange connecting surface that connects the outer end on the outside in the radial direction of the fourth flange end surface to the inner end on the inside in the radial direction of the fifth flange end surface and a fourth flange connecting surface that connects the outer end on the outside in the radial direction of the fifth flange end surface to the inner end on the inside in the radial direction of the sixth flange end surface,   the tangential direction of the third flange connecting surface at the inner end on the inside in the radial direction is parallel to the tangential direction of the fourth flange connecting surface on the outside in the radial direction in sectional view from the circumferential direction, the tangential direction of the third flange connecting surface at the outer end on the outside in the radial direction is parallel to the tangential direction of the fifth flange end surface at the inner end on the inside in the radial direction in sectional view from the circumferential direction,   the tangential direction of the fourth flange connecting surface at the inner end on the inside in the radial direction is parallel to the tangential direction of the fifth flange end surface at the outer end on the outside in the radial direction in the radial direction in sectional view from the circumferential direction, and   the tangential direction of the fourth flange connecting surface at the outer end on the outside in the radial direction is parallel to the tangential direction of the sixth flange end surface at the inner end on the inside in the radial direction in sectional view from the circumferential direction.   
     
     
         14 . The blower according to  claim 11 , wherein
 the one end surface of the vane further includes a second vane end surface located on the outside in the radial direction with respect to the inlet port,   the second vane end surface is inclined radially outward to the other side in the axial direction with respect to the plane orthogonal to the central axis when viewed from the circumferential direction, and   the first housing unit further includes a second plate provided in parallel to the second vane end surface on the one side in the axial direction with respect to the second vane end surface of each of the plurality of vanes.   
     
     
         15 . The blower according to  claim 14 , wherein
 the impeller further includes an annular ring portion that connects the plurality of vanes on at least one of the axial-direction one side and the other side of the vane, and   the second vane end surface is located on the outside in the radial direction with respect to the ring.   
     
     
         16 . The blower according to  claim 1 , wherein the impeller further includes an annular ring portion that connects the plurality of vanes on at least one of the axial-direction one side and the other side of the vane. 
     
     
         17 . The blower according to  claim 10 , wherein
 the ring has a curved surface, and   the curved surface has a curved shape protruding toward one side in the axial direction and the inside in the radial direction in sectional view from the circumferential direction.   
     
     
         18 . The blower according to  claim 1 , wherein when viewed from the circumferential direction, the inner end on the inside hi the radial direction of the vane projects from the flange toward the other side in the axial direction at the outer circumferential edge of the flange.