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Fan and cleaner

A technology of air supply device and stationary blade, which is applied in the directions of vacuum cleaners, pump devices, and components of pumping devices for elastic fluids, etc., can solve the problem of reduced air supply efficiency, inability to reduce the circumferential gap between adjacent blades, and the number of blades. Less problems, etc., to achieve the effect of improving air supply efficiency

Active Publication Date: 2018-12-07
NIDEC CORP
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  • Abstract
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Problems solved by technology

[0004] However, in Japanese Laid-Open Publication No. 2010-196705, the blades in the radial direction and the blades in the axial direction are provided in different areas through which the air circulates through the rotation of the impeller, so the number of blades in each area becomes small, and it is impossible to Reduce the circumferential gap between adjacent blades
Therefore, there is a possibility that the blowing efficiency may decrease

Method used

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Embodiment Construction

[0016] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In addition, in this specification, the direction in which the central axis of the air blower extends is called "axial direction", and the direction perpendicular to the central axis of the air blower is called "radial". The direction of the circular arc centered on the central axis is called "circumferential direction". In addition, the above-mentioned central axis extends along the "upper and lower direction", and in this specification, the shape and positional relationship of each part will be described with respect to the impeller with the suction side being referred to as the "upper side". However, the above-mentioned "up and down direction" does not limit the actual positional relationship and direction when it is installed in the device. In addition, "upstream" and "downstream" mean upstream and downstream, respectively, in the flow direction of the air ...

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Abstract

The present invention provides a fan and a cleaner. The fan includes an impeller rotated about the vertically extending central axis, a motor rotating the impeller, a motor housing housing the motor,and a fan casing disposed radially outside the motor housing to form a flow passage in a gap therebetween. A plurality of first stationary blades that axially extend and a second stationary blade thataxially extends are disposed radially outside the motor housing. The first stationary blades are arranged in a circumferential direction. The second stationary blade is disposed between the first stationary blades adjacent to each other in the circumferential direction. An upper end of the second stationary blade is disposed further to a lower side than upper ends of the first stationary blades and further to an upper side than lower ends of the first stationary blades.

Description

technical field [0001] The invention relates to an air supply device and a vacuum cleaner. Background technique [0002] A conventional centrifugal compressor is disclosed in Japanese Unexamined Patent Publication No. 2010-196705. The centrifugal compressor disclosed in Japanese Laid-Open Publication No. 2010-196705 includes a rotor, a diffuser, and a shroud. [0003] The rotor is constructed by installing an impeller and a bearing housing on the shaft. The diffuser has a hub, a peripheral wall, a plurality of radial blades, and a plurality of axial blades. The radial blades are two-dimensional blades arranged at intervals in the circumferential direction on the upper surface of the hub. The peripheral wall surrounds the hub at a distance from the hub. The axial blade is a two-dimensional blade extending between the peripheral wall and the hub. The rotor is rotatably mounted on the diffuser through a bearing seat. The shroud is attached to the diffuser so as to cover t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44
CPCF04D29/441F05D2250/52F04D25/06F04D29/4253F04D29/444F04D29/5806F05D2250/70A47L5/24A47L5/365A47L5/38F04D5/002F04D23/008
Inventor 早光亮介
Owner NIDEC CORP
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