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Propeller Fan, Molding Die, And Fluid Feed Device

A propeller and fan technology, applied in the field of propeller fans, can solve the problems of energy saving and resource saving design, reduce air supply efficiency, increase manufacturing cost and other problems, and achieve the effect of resource saving design

Active Publication Date: 2015-04-15
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] That is, the first problem is that although the deterioration of the pressure flow characteristics in the high static pressure region can be suppressed to a certain extent, in the low pressure and large air volume region, the rotation center cannot be fully and effectively used, reducing the air supply efficiency.
In addition, the second problem is that the weight of the propeller fan itself increases due to the large hub portion, which increases the load on the driving motor and increases power consumption.
In addition, the third problem is: increased material costs, thereby increasing manufacturing costs
Considering the current earth environment, these three problems will cause significant deficiencies in energy saving and resource saving design

Method used

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  • Propeller Fan, Molding Die, And Fluid Feed Device
  • Propeller Fan, Molding Die, And Fluid Feed Device
  • Propeller Fan, Molding Die, And Fluid Feed Device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0056] [Explanation of the structure of the propeller fan with two blades]

[0057] figure 1 It is a side view showing the propeller fan with two blades in Embodiment 1 of the present invention. figure 2 is from figure 1 A top view of the propeller fan viewed from the direction indicated by the middle arrow II (suction side). image 3 is from figure 1 A top view of the propeller fan viewed from the direction indicated by the middle arrow III (blowing side). Figure 4 is viewed from the suction side figure 1 A perspective view of a propeller fan in .

[0058] refer to Figure 1 to Figure 4 , The propeller fan 10 of the present embodiment is a two-blade propeller fan integrally formed of synthetic resin such as AS (acrylonitrile-styrene) resin added with glass fibers.

[0059] The propeller fan 10 has a blade 21A and a blade 21B (hereinafter referred to as the blade 21 when not particularly distinguished), and a connecting portion 31 that connects the blade 21A and the b...

Embodiment approach 2

[0142] In this embodiment, first, the structure of a molding die for molding the various propeller fans of Embodiment 1 using resin will be described.

[0143] Figure 25 It is a sectional view showing a molding die used to manufacture a propeller fan. refer to Figure 25 , the molding die 61 has a fixed side die 62 and a movable side die 63 . A cavity is defined by the fixed side mold 62 and the movable side mold 63, and the cavity is substantially the same shape as the propeller fan, and is used for injecting fluid resin.

[0144] A heater (not shown) may be provided in the molding die 61 for improving the fluidity of the resin injected into the cavity. It is particularly effective to provide such a heater when, for example, a synthetic resin having increased strength such as AS resin in which glass fibers are added is used.

[0145] In addition, in Figure 25 In the shown molding die 61 , it is assumed that the surface on the positive pressure side of the propeller fan...

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PUM

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Abstract

A propeller fan with two blades includes a blade (21 A) and a blade (21 B), and a connection portion (31) connecting the blades together. Each blade has a peripheral edge portion (21a) extending in an arc having a diameter D with a center axis (101) as a center thereof, a front edge portion (21 b) arranged on a forward side in a rotational direction, a rear edge portion (21 c) arranged on an opposite side in the rotational direction, and a leading blade edge portion (21d) connecting the front edge portion (21 b) and the peripheral edge portion (21a). A plane which includes each intersection (21e) between the rear edge portion (21 c) and the peripheral edge portion (21a) and is perpendicular to the center axis (101) is defined as ³. When the propeller fan is viewed in a direction parallel to a plane including the leading blade edge portions (21d) and the center axis (101), a distance H between plane ³ and a connected portion between the front edge portion (2 1 b) of the blade (21 A) and the rear edge portion (2 1 c) of the blade (21B), on a line of the center axis (101), satisfies 0.028 ‰¤ H / D ‰¤ 0.056. With such a structure, a propeller fan, a molding die, and a fluid feeder which make a significant contribution in terms of energy-saving properties and resource-saving design can be provided.

Description

technical field [0001] The present invention relates generally to a propeller fan, a molding die, and a fluid delivery device, and more particularly to a propeller fan for a blower; a molding die for molding such a propeller fan with resin; and an air conditioner having such a propeller fan Fluid conveying devices such as outdoor units, air purifiers, humidifiers, dehumidifiers, heaters, cooling devices, and ventilation devices. Background technique [0002] Regarding conventional propeller fans, for example, Japanese Patent Laying-Open Publication No. 3-88999 discloses an axial flow fan that provides positive pressure to the positive pressure surface of the propeller blade and negative pressure surface to the negative pressure surface. Negative pressure, to improve the lift of the propeller blade, but also improve the strength (Patent Document 1). The axial flow fan disclosed in Patent Document 1 has a plurality of propeller blades formed on the outer peripheral portion of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/32F04D29/38
CPCF04D29/384F04D29/32F04D29/38
Inventor 竹田康坚
Owner SHARP KK