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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 also been required to increase in diameter, but due to the strength of the blades, the increase in diameter has gradually reached its limit.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 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 according to the first embodiment. image 3 yes figure 2 The A-A line cross-sectional view of the cross-flow fan. Figure 4 It is a cross-sectional view of main parts showing the connecting parts of blades, protrusions, and reinforcement plates in the impeller according to the first embodiment. Figure 5 yes Figure 4 The B-B cross-sectional view of the connecting part of . In addition, for the prior art literature ( Figure 7 ~ Figure 12 ) The same structural components of the cross-flow fan are marked with the same symbols, and descriptions are omitted.

[0061] exist Figure 1 to Figure 5 Among them, the cross-flow fan 21 has an impeller 22 in which a plurality of blades 9 are arranged in an axial (rotation shaft 21 x ) direction and is connected in a cylind...

Embodiment approach 2

[0076] Image 6 It is a figure which shows the main part of the impeller 32 with which the cross-flow fan 31 which concerns on Embodiment 2 of this invention is equipped. In addition, the same code|symbol is attached|subjected to the same component as cross-flow fan 21 of Embodiment 1 mentioned above, and description is abbreviate|omitted.

[0077] Such as Image 6 As shown, the protruding length ( Image 6 The length in the left-right direction) is formed so as to gradually become smaller 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) is set within the 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 protruding portion 13 with respect to the entire impeller 32 in this way, sufficient strength for connecting the reinforcing plate 10 and the blade 9 can be ensu...

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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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