Impeller and cleaner using same

Abstract

A cleaner including a body, a dust case, a shaft, a motor to rotate the shaft, and an impeller that rotates by the rotation of the rotation shaft by the motor to generate a suction force for suctioning air into the body from the dust case through an air passage, the impeller including: a boss portion fixed to the shaft, a base portion extended from the boss portion and having a diameter that increases from an intake side toward a discharge side of the air passage, and a plurality of blades on the base portion, each blade including: a wind cutting edge having a proximal end, and a protruding end, is behind the proximal end in a rotation direction of the impeller, and is closer to the intake side than the boss portion and a wind sending edge that is farther from the boss portion than the wind cutting edge.

1 . A cleaner comprising:
 a main body;   a dust case;   a rotation shaft;   a fan motor to rotate the rotation shaft; and   an impeller that rotates by the rotation of the rotation shaft by the fan motor to generate a suction force for suctioning air into the main body from the dust case through an air passage, the impeller including:
 a boss portion fixed to the rotation shaft, 
 a base portion extending from the boss portion and having a diameter that increases from an intake side of the air passage toward a discharge side of the air passage, and 
 a plurality of blades on the base portion, each blade of the plurality of blades including:
 a wind cutting edge that has a proximal end at the base portion, and a protruding end that is opposite to the proximal end, is behind the proximal end in a rotation direction of the impeller, and is closer to the intake side than the proximal end is to the intake side, and 
 a wind sending edge that is farther from the boss portion than the wind cutting edge is from the boss portion. 
 
   
     
     
         2 . The cleaner of  claim 1 , wherein
 the wind cutting edge has a swept-back angle with respect to a reference line passing through a center of rotation of the impeller and the proximal end of the wind cutting edge in a radial direction in a range of 15° to 19°.   
     
     
         3 . The cleaner of  claim 1 , wherein
 the wind cutting edge has an inclination angle with respect to a reference line that is orthogonal to a rotation axis of the impeller in a range of 18° to 26°.   
     
     
         4 . The cleaner of  claim 1 , wherein
 the wind sending edge extends from an upper surface of the base portion at an angle relative to a direction orthogonal to the upper surface and opposite of the rotation direction.   
     
     
         5 . The cleaner of  claim 1 , wherein
 the plurality of blades are on an upper surface of the base portion which is sloped toward the discharge side of the air passage while extending toward a circumferential side of the impeller in a radial direction from the boss portion.   
     
     
         6 . The cleaner of  claim 5 , wherein
 the upper surface has an inclination angle with respect to a rotation axis of the impeller in a range of 20° to 40°.   
     
     
         7 . The cleaner of  claim 1 , wherein
 the plurality of blades include at least one of a mixed flow fan structure and a centrifugal fan structure.   
     
     
         8 . The cleaner of  claim 1 , further comprising:
 an upstream shroud at least partially upstream of the impeller and including:
 a first diameter portion having a first diameter larger than an intake side of the impeller, and 
 a first diameter reduction portion which extends from the first diameter portion toward the intake side of the impeller and has a first reduction diameter that decreases from the first diameter portion toward the intake side of the impeller, and a downstream shroud at least partially downstream of the impeller and including: 
 a second diameter portion having a second diameter larger than a discharge side of the impeller, and 
 a second diameter reduction portion which extends from the second diameter portion toward the intake side of the impeller and has a second reduction diameter that decreases from the second diameter portion toward the intake side of the impeller, and 
   the impeller is in the second diameter reduction portion.   
     
     
         9 . The cleaner of  claim 8 , further comprising:
 a diffuser in the second diameter portion.   
     
     
         10 . An impeller comprising:
 a boss portion fixable to a rotation shaft of a fan motor so that the impeller is rotatable by rotation of the rotation shaft by the fan motor to generate a suction force for suctioning air through an air passage;   a base portion extending from the boss portion and having a diameter that, when the boss portion is fixed to the rotation shaft so that the impeller is rotatable by rotation of the rotation shaft by the fan motor to generate the suction force for suctioning air through the air passage, increases from an intake side of the air passage toward a discharge side of the air passage; and   a plurality of blades on the base portion, each blade of the plurality of blades including:
 a wind cutting edge that has a proximal end at the base portion, and a protruding end that is opposite to the proximal end, is behind the proximal end in a rotation direction of the impeller, and, when the boss portion is fixed to the rotation shaft so that the impeller is rotatable by rotation of the rotation shaft by the fan motor to generate the suction force for suctioning air through the air passage, is closer to the intake side of the air passage than the proximal end is to the intake side of the air passage, and 
 a wind sending edge that is farther from the boss portion than the wind cutting edge is from the boss portion. 
   
     
     
         11 . The impeller of  claim 10 , wherein
 the wind cutting edge has a swept-back angle with respect to a reference line passing through a center of rotation of the impeller and the proximal end in a radial direction in a range of 15° to 19°.   
     
     
         12 . The impeller of  claim 10 , wherein
 the wind cutting edge has an inclination angle with respect to a reference line that is orthogonal to a rotation axis of the impeller in a range of 18° to 26°.   
     
     
         13 . The impeller of  claim 10 , wherein
 the plurality of blades are on an upper surface of the base portion which, when the boss portion is fixed to the rotation shaft so that the impeller is rotatable by rotation of the rotation shaft by the fan motor to generate the suction force for suctioning air through the air passage, is sloped toward the discharge side of the air passage while extending toward a circumferential side of the impeller in a radial direction from the boss portion.   
     
     
         14 . The impeller of  claim 13 , wherein
 the upper surface has an inclination angle with respect to a rotation axis of the impeller in a range of 20° to 40°.   
     
     
         15 . The impeller of  claim 10 , wherein
 the plurality of blades include at least one of a mixed flow fan structure and a centrifugal fan structure.