Once through fan

A cross-flow fan technology, applied in the field of cross-flow fans, can solve the problem of reaching the limit of large diameter, and achieve the effects of inhibiting peeling, inhibiting deterioration and noise, and eliminating steps

Active Publication Date: 2014-04-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, in recent years, in order to save electricity, the air volume of indoor units has been increased, so cross-flow fans have

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] (Embodiment 1)

[0060] figure 1 It is an exploded cross-sectional view of the cross-flow fan according to Embodiment 1 of the present invention. figure 2 It is a cross-sectional view showing one impeller of the cross flow fan of the first embodiment. image 3 Yes figure 2 A-A cross-sectional view of the cross-flow fan. Figure 4 It is a cross-sectional view of the main part showing the connection part of the blade, the protrusion, and the reinforcing plate in the impeller of the first embodiment. Figure 5 Yes Figure 4 B-B cross-sectional view of the connection part. In addition, for documents related to prior art ( Figure 7 ~ Figure 12 ) The same structural components of the cross-flow fan are marked with the same symbols, and the description is omitted.

[0061] in Figure 1 to Figure 5 Among them, the cross-flow fan 21 has an impeller 22 in which a plurality of cylindrical blades 9 are connected in a shaft (rotating shaft 21x) direction, and end plates 3 and 4 are p...

Example Embodiment

[0075] (Embodiment 2)

[0076] Image 6 It is a figure which shows the main part of the impeller 32 which the cross flow fan 31 of Embodiment 2 of this invention has. In addition, the same components as those of the cross-flow fan 21 of Embodiment 1 described above are given the same reference numerals, and descriptions thereof are omitted.

[0077] Such as Image 6 As shown, the protrusion length of the protrusion 13 connected to the reinforcing plate 10 from the inner end 9a of the blade 9 to the radial inward direction ( Image 6 The length in the left-right direction in the middle) is formed so as to gradually decrease as it moves away from the reinforcing plate 10 in the axial direction. The axial height h of the impeller 32 of the protrusion 13 ( Image 6 The length in the vertical direction in the middle) is set to a range of 1% to 15% of the axial height H of the blade 9 (impeller 32) (that is, h / H=1% to 15%).

[0078] By setting the shape of the protrusion 13 with respect t...

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PUM

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Abstract

Provided is a once through fan in which a plurality of impellers, comprising a plurality of blades disposed in a cylindrical shape, are provided connected in the axial direction. The impellers comprise a circular or disk shaped reinforcement plate having an outer diameter smaller than the diameter of the inner end part of the plurality of blades disposed in a cylindrical shape, and a plurality of projections formed so as to project inward in the radial direction of the cylindrical shape from a portion of the inner end part of each of the blades. The blades, the projections and the reinforcement plate are formed integrally so that the reinforcement plate connects, via the respective projections, to the inner end parts of each of the blades.

Description

technical field [0001] The present invention relates to a cross-flow fan used in an air conditioner for cooling or heating a room. Background technique [0002] Cross-flow fans used in indoor units of air conditioners, which are household air conditioners, are required to improve their air blowing performance (air volume, noise) due to the downsizing of the air conditioner, power saving, etc. In addition, it is also required to operate the cross-flow fan at a higher rotational speed or to further expand the variable range of the rotational speed. Therefore, the thickness of the blade constituting the impeller of the cross-flow fan is reduced, and the amount of glass fiber and carbon fiber mixed into the resin material that is the forming material of the blade is increased to ensure the strength of the blade itself. [0003] In addition, in recent years, in order to save electricity, the air volume of indoor units has been increased, so cross-flow fans have also been require...

Claims

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Application Information

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IPC IPC(8): F04D17/04F04D29/66
CPCF04D29/283F04D17/04F04D29/626
Inventor 木田琢己杉尾孝
Owner PANASONIC CORP
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