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Centrifugal fan

A centrifugal fan and central axis technology, which is applied to non-variable volume pumps, non-displacement pumps, components of pumping devices for elastic fluids, etc. The effect of raising and lowering noise

Active Publication Date: 2009-04-22
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In a centrifugal fan using an impeller including a cup portion for accommodating an electric motor at a central portion, turbulent flow of air tends to be generated near the outer surface of the cup portion when the turbulent flow moves away from the cup portion toward the outside And when it flows into the blades arranged along the circumference, the noise of the centrifugal fan increases

Method used

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  • Centrifugal fan
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Embodiment Construction

[0027] Hereinafter, the centrifugal fan according to the present invention will be described for various embodiments with reference to the accompanying drawings. The present invention is not limited to the examples described below.

[0028] 1 is a view showing the configuration of a centrifugal fan 1 according to an embodiment of the present invention, showing a longitudinal section cut along a plane including a central axis J1. figure 2 is a plan view showing the centrifugal fan 1 . In FIG. 1 , the illustration of the ends of the housing 10 on the left and right sides is omitted, and in figure 2 A state in which the cover portion (indicated by reference numeral 111 in FIG. 1 ) of the upper surface of the casing 10 is removed is shown in . As shown in FIGS. 1 and 2 , a centrifugal fan 1 includes: an impeller 2 for generating airflow by rotation; and a motor 3 connected to the impeller 2 for rotating the impeller 2 around a predetermined central axis J1, wherein The impeller...

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PUM

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Abstract

The present invention provides a centrifugal fan which includes an impeller for producing the flow of air by rotation, and a motor for rotating the impeller. The impeller includes a plurality of main blades and a plurality of auxiliary blades. In the centrifugal fan, the turbulent flow of air flowing near the outer surface of the cup part is suppressed and the noise of the centrifugal fan is reduced by connecting the auxiliary blades to the outer surface of the cup part. An opening passing through with respect to the center axis direction is formed between two adjacent auxiliary wings, and the opening end on the lower side of the opening is inclined towards a stator side, whereby some air that flowed to the outer surface efficiently flows into the cup part, thereby supplying air to the stator and suppressing temperature rise of the stator.

Description

technical field [0001] The invention relates to an electrically operated centrifugal fan for blowing air. Background technique [0002] Conventionally, in a centrifugal fan for sucking air in the axial direction and exhausting air in the radial direction, an impeller having a plurality of blades arranged in the circumferential direction and centering on the axis of rotation is provided, Various modifications have been made to achieve noise reduction, improve air volume performance, and suppress performance degradation that occurs when the temperature of the motor increases. [0003] For example, a multi-blade fan is disclosed in which an inducer section is connected to the inner side of the blades. In addition, an impeller is disclosed in which fan efficiency is improved compared to a general-shaped multi-blade fan of the same size by making the shape of the blades a combination of a turbo fan and a multi-blade fan. [0004] Disclosed is a technology in which an impeller s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F04D29/30F04D17/08
CPCF04D29/30F04D29/281F04D25/0613F04D13/06
Inventor 永松秀规
Owner NIDEC CORP