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Fan, casting die and fluid delivery device

A technology of fans and fluids, applied in the components of pumping devices for elastic fluids, radial flow pumps, liquid fuel engines, etc., can solve the problems of reducing nZ sound, narrowing the width of air flow, and incapable of obtaining sufficient , to achieve the effect of reducing noise and good air supply capacity

Active Publication Date: 2011-12-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this blade shape narrows the width of the airflow flowing along the blade, thereby concentrating the wake downstream of the blade.
Therefore, the effect of reducing the primary sound of the nZ sound cannot be sufficiently obtained

Method used

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  • Fan, casting die and fluid delivery device
  • Fan, casting die and fluid delivery device
  • Fan, casting die and fluid delivery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] (Explanation of the structure of the cross-flow fan)

[0056] figure 1 It is a perspective view showing the cross-flow fan according to Embodiment 1 of the present invention. figure 2 is the composition figure 1 A perspective view of one impeller of a cross-flow fan in . image 3 is along figure 1 A cross-sectional view of a cross-flow fan on line III-III.

[0057] refer to Figure 1 to Figure 3 , the cross-flow fan (cross-flow fan) 100 of this embodiment has a plurality of fan blades 21 . The overall appearance of the cross-flow fan 100 is substantially cylindrical, and a plurality of fan blades 21 are disposed on the substantially cylindrical peripheral surface. The cross-flow fan 100 is integrally formed of resin. The cross-flow fan 100 rotates in a direction indicated by an arrow 103 around a virtual central axis 101 shown in the figure.

[0058] The cross-flow fan 100 blows air in a direction perpendicular to a central axis 101 as a rotation axis by a plur...

Embodiment approach 2

[0128] In this embodiment, a modified example of cross-flow fan 100 according to Embodiment 1 will be described.

[0129] Figure 15 yes means figure 1 A cross-sectional view of a modification of the cross-flow fan in . Figure 16 to Figure 21 yes means Figure 15 A cross-sectional view of various fan blades in a cross-flow fan.

[0130] refer to Figure 15 , in the cross-flow fan of this modified example, the plurality of fan blades 21 are composed of various types of fan blades 21A, 21B, 21C, 21D, 21E, and 21F. In the fan blades 21A to 21F, the recesses 41 are formed in different forms from each other. The fan blades of the plurality of fan blades 21A to 21F are respectively provided.

[0131] The installation form of the recess 41 refers to the shape of the recess 41 (cross-sectional shape, groove depth, opening width, etc.), the position where the recess 41 is formed, or the number of the recess 41 . Such as Figure 16 to Figure 21 As shown in , in this modified ex...

Embodiment approach 3

[0138] In this embodiment, first, the structure of the centrifugal fan used for the fan of this invention is demonstrated, Next, the structure of the blower and air cleaner which used this centrifugal fan is demonstrated. In addition, the centrifugal fan of the present embodiment has the same partial structure as the cross-flow fan 100 of the first embodiment. Hereinafter, the repeated structure will not be described again.

[0139] (Description of the structure of the centrifugal fan)

[0140] Figure 22 It is a perspective view showing the centrifugal fan according to Embodiment 3 of the present invention. refer to Figure 22 , the centrifugal fan 10 of this embodiment has a plurality of fan blades 21 . The overall appearance of the centrifugal fan 10 is substantially cylindrical, and a plurality of fan blades 21 are arranged on the peripheral surface of the substantially cylindrical shape. The centrifugal fan 10 is integrally formed of resin. Centrifugal fan 10 to F...

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PUM

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Abstract

The invention provides a fan, a casting die, and a fluid delivery device. A cross flow fan is provided with multiple fan blades (21) that are circumferentially provided with intervals therebetween. The fan blade (21) has an inner edge (27) that is arranged on the inner circumference side and an outer edge (26) that is arranged on the outer circumference side. A blade surface (23) that extends between the inner edge (27) and the outer edge (26) is formed by the fan blade (21). An air flow that flows between the inner edge (27) and the outer edge (26) is generated on the blade surface (23) with the rotation of the fan. The fan blade (21) has an airfoil profile where a recess (41) is formed on the blade surface (23). The recess (41) is arranged in a position nearer to the outer edge (26) than the inner edge (27) and is formed extending from one edge (31) of the fan blade (21) to the other edge (32) in the direction of the fan rotation axis. With the disclosed structure, the fan can deliver excellent power and reduce noise.

Description

technical field [0001] The present invention relates to a fan, a molding die, and a fluid transfer device, and more specifically, to a fan such as a cross-flow fan or a centrifugal fan, a molding die for manufacturing the fan, and a fluid transfer device having the fan. Background technique [0002] As a conventional fan, for example, Patent Document 1 (Japanese Patent Laid-Open Publication No. Hei 1-318798) discloses an impeller of a multi-blade blower that generates side wind noise or n sound (n: rotational speed), etc. Moderate and disperse the wake vortex. In the impeller of the multi-blade blower disclosed in Patent Document 1, a columnar portion is provided at the tip of the blade on the fan outer peripheral side, and the diameter of the columnar portion is larger than the wall thickness of the tip of the blade. [0003] Furthermore, Patent Document 2 (Japanese Patent Laid-Open Publication No. Hei 5-44686) discloses a cross-flow fan which has a low noise level and hig...

Claims

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Application Information

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IPC IPC(8): F04D29/28
CPCF04D17/04F04D29/282F04D29/283F04D29/023F04D29/30F04D17/16F05D2300/44F05D2230/53F04D29/681
Inventor 白市幸茂大塚雅生高桥雅也
Owner SHARP KK