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Electric blower

a blower and electric technology, applied in the direction of non-positive displacement fluid engines, radial flow pumps, pump components, etc., can solve the problems of reducing blowing efficiency, and achieve the effect of improving the blowing efficiency of electric blowers and enhanced air tightness

Inactive Publication Date: 2022-04-21
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present disclosure is about improving the airtightness between the fan case and the fan case spacer of an electric blower. The aim is to enhance the blowing efficiency of the electric blower. The technical effect of the disclosure is to make the electric blower more effective in improving airtightness.

Problems solved by technology

However, conventional electric blowers fail to sufficiently secure airtightness between the fan case and the fan case spacer, leading to a decrease in the blowing efficiency.

Method used

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  • Electric blower
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Examples

Experimental program
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Effect test

case 30

[0040]Fan case 30 is a cover covering centrifugal fan 20 and air guide 50. Specifically, fan case 30 is a metal cover made of a metal material. Fan case 30 has centrifugal fan 20 and air guide 50 inside fan case 30. In other words, centrifugal fan 20 and air guide 50 are housed in fan case 30.

[0041]Fan case 30 includes lid part 31 (first fan case part) that covers an upper portion of centrifugal fan 20 and air guide 50, and side wall part 32 (second fan case part) that covers side portions of centrifugal fan 20 and air guide 50.

[0042]Fan case 30 is fixed to motor case 60. Specifically, side wall part 32 of fan case 30 is connected to an opening end of motor case 60, whereby fan case 30 and motor case 60 are fixed to each other.

[0043]Fan case 30 includes inlet 30a (intake port) for drawing outside air. Inlet 30a is a circular through hole provided in a central portion of lid part 31. Inlet 30a, which is a second opening, of fan case 30 faces inlet 20a, which is the first opening, of ...

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Abstract

An electric blower includes: a rotor that includes a rotary shaft; a centrifugal fan that includes a first opening and is attached to the rotary shaft; a fan case that includes a second opening and covers the centrifugal fan, the second opening including an opening end that is located outside an opening end of the first opening; and a fan case spacer that includes a third opening and is attached to the fan case, the third opening being in communication with the first opening. The fan case spacer includes: a spacer part that closes off a gap between the opening end of the first opening and the opening end of the second opening; and a cover part that extends outward from the opening end of the second opening and covers an outer surface of the fan case. The cover part includes a protrusion that is annular, protrudes toward the outer surface of the fan case, and surrounds the second opening. The protrusion is located between the opening end of the second opening and a tip part of the cover part and is in contact with the outer surface of the fan case.

Description

TECHNICAL FIELD[0001]The present disclosure relates to an electric blower.BACKGROUND ART[0002]Electric blowers are used in various electric apparatuses such as vacuum cleaners. An electric blower disposed in a vacuum cleaner employs, as a rotary fan, a centrifugal fan capable of providing a high suction pressure. The centrifugal fan is attached to the rotary shaft of a motor and rotates at high speed to generate a desired air pressure.[0003]An electric blower employing a centrifugal fan includes, for example, a motor, a centrifugal fan attached to the rotary shaft of the motor, a fan case covering the centrifugal fan, and a fan case spacer attached to the fan case (see PTL 1, for example).[0004]In order to improve the blowing efficiency of the electric blower, it is important to secure airtightness between the fan case and the fan case spacer. However, conventional electric blowers fail to sufficiently secure airtightness between the fan case and the fan case spacer, leading to a de...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D29/62F04D29/02
CPCF04D29/4226F04D29/023F04D29/624F04D29/4206F04D29/162F04D17/165F04D29/4253F04D29/4213
Inventor YAMAGUCHI, AKIRA
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD