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Forced draught blower

An air supply device and fan technology, which is applied to pump devices, components of pumping devices for elastic fluids, non-variable-capacity pumps, etc. and other problems to achieve the effect of improving characteristics, improving cost performance, and reducing noise

Inactive Publication Date: 2005-12-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This part has a large loss and is prone to flow separation, so that the air flow is separated from the blade surface, and a vortex is generated in the separation area, which increases the turbulent noise and causes the problem of noise level and air volume-static pressure characteristics deterioration.

Method used

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  • Forced draught blower
  • Forced draught blower
  • Forced draught blower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Figures 1A to 1D The air blower of Example 1 is shown. in, Figure 1A is the side view of the air supply device, Figure 1B for the front view, Figure 1C for the sectional view, Figure 1D It is the cross-sectional view of X-X1.

[0027] Such as Figure 1D As shown, the annular wall 2 is composed of a first area with a partially enlarged inner diameter and a second area with a narrowed gap with the vane front end, so that the gap with the vane front end on the suction side is substantially increased, and the end of the second area is at the discharge end. The side is disconnected halfway. In addition, an air bag portion 11 having a constant volume is formed between the outer periphery of the annular wall and the outer peripheral portion 10 of the casing.

[0028] pass now figure 2 , image 3 Explain the principle of this air blower.

[0029] figure 2 In the conventional air blower, the shape of the annular wall at the suction port side is shown to increas...

Embodiment 2

[0046] Figures 6A to 6D The case of the air blower of Example 2 is shown. in, Figure 6A for the side view, Figure 6B for the front view, Figure 6C for the sectional view, Figure 6D It is the cross-sectional view of X-X1.

[0047] exist Figures 6A to 6D Among them, the housing of Embodiment 2 is characterized in that the spokes 17 that support the hub portion 16 to which the motor is fixed are fixed to the annular wall portion instead of being directly fixed to the outer peripheral portion 10 of the housing or the motor mounting hole 18 . The shape of other parts is exactly the same as that of the housing of Embodiment 1. Figures 7A to 7C Indicates a mounting fixture. in, Figure 7A for the front view, Figure 7B for the side view, Figure 7C For top view.

[0048] When fixing the air supply device on the frame body, the installation hole 18 can be used and fixed with small screws, etc., or such as Figures 7A to 7C The shown installation jig 21 of the air blow...

Embodiment 3

[0063] Figures 9A to 9D The case of the air blower of Example 3 is shown. in, Figure 9A for the side view, Figure 9B for the front view, Figure 9C for the sectional view, Figure 9D It is the cross-sectional view of X-X1.

[0064] exist Figures 9A to 9D Among them, the difference between the housing of Embodiment 3 and the above-mentioned Embodiment 1 is that the inner circumference of the annular wall communicates with the airbag part 11 on the discharge side part of the annular wall to form a plurality of grooves 19 protruding in the axial direction, and other Part is then exactly the same as Example 1.

[0065] The grooves 19 are effective in improving the characteristics of the air blower, especially when the static pressure is high.

[0066] Figure 10 It is an explanatory diagram showing the flow of air under the operating conditions of the air blower according to the third embodiment.

[0067] Such as Figure 10 As shown, since the blade tip vortex includ...

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PUM

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Abstract

To provide an air supply device to improve energy efficiency, characterized by being separated from the front end of the fan blade to form an annular wall (2), the suction side of the annular wall (2) has a first area that partially expands the inner diameter and a second area with the gap between the front end of the blade and the opening of the groove and the gap with the front end of the blade substantially expands, and the outer periphery of the annular wall and the outer periphery of the housing (10) is provided with an air sac (11).

Description

technical field [0001] The present invention relates to a blower device. Background technique [0002] In recent years, due to the miniaturization and electronicization of equipment, high-density installation of electrical circuits has been widely used. Due to the corresponding increase in heat density of electronic equipment, the air supply unit is used for equipment cooling. [0003] In addition, due to cost reduction of equipment, there is a strong demand for cost reduction even for air blowers used in these equipment. [0004] Such as Figure 12 As shown, the existing air blower is spaced from the front end of the blade of the fan 1 to form an annular wall 2. In the state of blowing air to the motor part 3, the axial flow fan 1 rotates around the shaft 4 and generates Air flow 5 from the suction side towards the discharge side. [0005] However, in the air blowing state described above, the velocity of the air flow on the back pressure side at the tip of the blade inc...

Claims

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Application Information

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IPC IPC(8): F04D29/54F04D25/08F04D29/66
CPCF04D25/08Y10S415/915F04D25/0613
Inventor 藤中广康
Owner PANASONIC CORP