CN111425453A - Air guide device - Google Patents

Air guide device Download PDF

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Publication number
CN111425453A
CN111425453A CN202010243936.2A CN202010243936A CN111425453A CN 111425453 A CN111425453 A CN 111425453A CN 202010243936 A CN202010243936 A CN 202010243936A CN 111425453 A CN111425453 A CN 111425453A
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CN
China
Prior art keywords
fan blade
blade
air guide
fan
air
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Pending
Application number
CN202010243936.2A
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Chinese (zh)
Inventor
王东
孙英
王翠翠
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Publication date
Application filed by Lenovo Beijing Ltd filed Critical Lenovo Beijing Ltd
Priority to CN202010243936.2A priority Critical patent/CN111425453A/en
Publication of CN111425453A publication Critical patent/CN111425453A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The embodiment of the application discloses air ducting, air ducting includes: an air guide body; the wind guide body includes: the fixing part is positioned in the middle of the air guide body and is used for being connected with a power mechanism for driving the air guide body to rotate; a first fan blade group; the first fan blades in the first fan blade group are respectively and fixedly connected with the fixing part; the first fan blades in the first fan blade group are arranged at intervals in the circumferential direction of the fixing part; in the process that the fixing part rotates, the air guide body can prevent air from generating vortex. In the air guide device provided by the embodiment of the application, in the process of rotating the fixing part, the air guide body can prevent air from generating vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.

Description

Air guide device
Technical Field
The embodiment of the application relates to an air guide device.
Background
The air guide device structure is a structure frequently used by people, and is generally provided with an air guide body and a power mechanism, wherein the power mechanism drives the air guide body to rotate, and the air guide body comprises a fixing part and fan blades. However, in the process of rotating the fixing portion, the air guide device is easy to generate an eddy current, so that the air guide device generates a large noise.
Disclosure of Invention
In view of this, the present application is directed to an air guiding device.
In order to achieve the purpose, the technical scheme of the application is realized as follows:
an embodiment of the present application provides an air guiding device, air guiding device includes: an air guide body;
the wind guide body includes:
the fixing part is positioned in the middle of the air guide body and is used for being connected with a power mechanism for driving the air guide body to rotate;
a first fan blade group; the first fan blades in the first fan blade group are respectively and fixedly connected with the fixing part; the first fan blades in the first fan blade group are arranged at intervals in the circumferential direction of the fixing part;
in the process that the fixing part rotates, the air guide body can prevent air from generating vortex.
In some optional implementations, the wind guide further includes:
the connecting parts are arranged on the peripheral sides of the fixing parts at intervals in a closed shape and are fixedly connected with the first fan blades in the first fan blade group;
a second fan blade group; the second fan blades in the second fan blade group are respectively and fixedly connected with the connecting parts; the second fan blade is arranged between the adjacent first fan blades;
in the process that the fixing part rotates, the second fan blades in the second fan blade group can prevent air between the adjacent first fan blades from generating vortex.
In some optional implementations, the wind guide further includes:
a third fan blade group; the third blades in the third blade group are respectively and fixedly connected with the connecting parts; the third fan blade is arranged between the adjacent first fan blade and the second fan blade;
in the process of rotating the fixing part, the third fan blade in the third fan blade group can prevent air between the adjacent first fan blade and the second fan blade from generating vortex;
wherein, the distance between the adjacent fan blades is the same.
In some optional implementations, the second fan blade is fixedly connected to one end of the connecting portion close to the fixing portion, and the third fan blade is fixedly connected to one end of the connecting portion far from the fixing portion;
the first fan blade, the second fan blade and the third fan blade radially extend towards the side far away from the fixed part.
In some alternative implementations, the first fan blade has a first width, the second fan blade has a second width, and the third fan blade has a third width; the value of the first width is greater than the value of the second width, which is greater than the value of the third width; the width of the fan blade is the width formed from the root of the fan blade to the end of the fan blade;
the end parts of the first fan blade, the second fan blade and the third fan blade are all at the same distance from the fixing part;
the shape of the first part of the third fan blade is the same as that of the first fan blade, and the shape of the second part of the second fan blade is the same as that of the first fan blade.
In some optional implementations, the first fan blade, the second fan blade, and the third fan blade are symmetrically distributed with respect to the connecting portion in a height direction of the air guide body; the height direction of the air guide body is the axis direction of the rotation of the fixing part.
In some alternative implementations, the first fan blade has a first inlet stagger angle, the second fan blade has a second inlet stagger angle, and the third fan blade has a third inlet stagger angle;
wherein the first inlet stagger angle, the second inlet stagger angle, and the third inlet stagger angle are all the same.
In some alternative implementations, the curvature of the first surface of the first blade and the curvature of the second surface of the first blade vary in a width direction of the first blade; the width direction of the first fan blade is the direction from the root of the first fan blade to the end of the first fan blade, and the second surface of the first fan blade and the first surface of the first fan blade are two opposite surfaces forming the thickness of the first fan blade;
in the rotating process of the fixing part, the first fan blade can prevent air on the surface of the first fan blade from generating vortex.
In some alternative implementations of the method of the present invention,
the section of the first fan blade in the circumferential direction is an airfoil shape; the chord length of the airfoil section is gradually increased in the width direction of the first fan blade, the thickness of the airfoil section is gradually reduced in the width direction of the first fan blade, and the area of the airfoil section is gradually increased in the width direction of the first fan blade.
In some optional implementations, in a process of rotating the fixing portion, the first fan blade is bent in a circumferential direction, and a bending direction of the first fan blade is the same as a rotation direction of the air guide body; a first straight line is formed between the rear edge of the root of the first fan blade and the axis of the fixing part, a second straight line is formed between the rear edge of the end part of the first fan blade and the axis of the fixing part, and a first included angle is formed between the first straight line and the second straight line; wherein the angle value of the first included angle is greater than zero;
in the process that the fixing part rotates, the first fan blade can enable air to flow along the circumferential direction of the fixing part.
In the air guide device in the embodiment of the application, in the process of rotating the fixing part, the air guide body can prevent air from generating vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.
Drawings
Fig. 1 is an alternative structural schematic view of an air guide body of an air guide device in an embodiment of the present application;
fig. 2 is a schematic partial structure view of an alternative air guide body of the air guide device in the embodiment of the present application;
fig. 3 is a schematic partial structure view of an alternative air guiding device in an embodiment of the present application;
fig. 4 is a schematic partial structure view of an alternative air guiding device in an embodiment of the present application;
fig. 5 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 6 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 7 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 8 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 9 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 10 is an alternative structural schematic view of an air guide body of the air guide device in the embodiment of the present application;
fig. 11 is an alternative structural schematic view of an air guide body of an air guide device in an embodiment of the present application;
fig. 12 is a PQ curve of the air guide device according to the embodiment of the present application.
Fig. 13 is a PQ curve of the air guide device and the fan having a constant surface curvature according to the example of the present application.
Reference numerals: 100. an air guide body; 110. a first fan blade; 111. a root of a first fan blade; 112. an end of the first blade; 113. a first surface; 114. a second surface; 120. a second fan blade; 121. the root of the second fan blade; 122. the end of the second fan blade; 130. a third fan blade; 131. root of the third fan blade; 132. the end of the third fan blade; 140. a fixed part; 150. a connecting portion; 200. a housing; 201. and (7) air outlet.
Detailed Description
The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments of the specification.
In the description of the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connected" should be interpreted broadly, for example, as an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
It should be noted that the terms "first \ second \ third" referred to in the embodiments of the present application are only used for distinguishing similar objects, and do not represent a specific ordering for the objects, and it should be understood that "first \ second \ third" may exchange a specific order or sequence order if allowed. It should be understood that "first \ second \ third" distinct objects may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented in an order other than those illustrated or described herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The air guide device according to the embodiment of the present application will be described in detail below with reference to fig. 1 to 13.
The air guide device comprises: an air guide body 100; the air guide body 100 includes: a fixing portion 140 and a first fan blade set. The fixing part 140 is located in the middle of the wind guide body 100, and the fixing part 140 is used for being connected with a power mechanism for driving the wind guide body 100 to rotate; the first blades 110 in the first blade group are respectively and fixedly connected with the fixing part 140; the first blades 110 in the first blade group are arranged at intervals in the circumferential direction of the fixing part 140; in the process of rotating the fixing part 140, the air guide 100 can prevent air from generating a vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.
In the embodiment of the present application, the structure of the air guiding device is not limited. For example, the air guide device may be a centrifugal fan or an axial fan. As an example, as shown in fig. 3 and 4, when the air guiding device is a centrifugal fan, the air guiding device may further include: a machine shell 200, wherein the machine shell 200 is provided with an air outlet 201; the air guide body 100 is disposed in the casing 200, and in the process of rotating the fixing portion 140, air is sucked from the middle of the air guide body 100 through negative pressure, and the first fan blade 110 can make the sucked air flow in a direction away from the fixing portion 140 side, and finally be guided out through the air outlet 201.
In the embodiment of the present application, the structure of the wind guide 100 is not limited. For example, the wind guide body 100 may be a fan blade body.
In the embodiment of the present application, the structure of the fixing portion 140 is not limited. For example, the fixing portion 140 may have a cylindrical structure.
Here, the fixing portion 140 is used to connect with a power mechanism for driving the wind guide body 100 to rotate, so that the power mechanism drives the wind guide body 100 to rotate through the fixing portion 140. The structure of the power mechanism is not limited, and for example, the power mechanism may be a motor.
In the embodiment of the present application, the first fan blades 110 in the first fan blade set are respectively and fixedly connected to the fixing portion 140, and the first fan blades 110 in the first fan blade set and the fixing portion 140 are an integral structure; the first blade 110 and the fixing portion 140 may be integrally formed or fixedly connected to form an integral structure.
Here, the structure of the first fan blade 110 is not limited. For example, the first fan blade 110 may be a bent plate-like structure. For another example, the first blades 110 extend radially away from the fixing portion 140.
For example, the first blade 110 may be made of a liquid Crystal Polymer (L liquid Crystal Polymer, L CP), so that the first blade 110 is made thinner and the mechanical strength of the first blade 110 is higher, thereby providing a greater number of first blades 110 in the same space and the same gap, and at the same time, the mechanical strength of the first blade 110 can be greatly improved under the condition that the thickness of the first blade 110 is the same, in an application scenario, the thickness of the first blade 110 is 0.4 mm.
Here, the cross-sectional shapes of the first blades 110 in the width direction may be the same or different.
Here, the distances between the adjacent first blades 110 in the first blade group may be the same or different.
In some optional implementations of the embodiment of the present application, the wind guide body 100 may further include: a connecting part 150 and a second fan blade group; the connecting part 150 is disposed around the fixing part 140 in a closed shape at intervals, and the connecting part 150 is fixedly connected to the first fan blade 110 in the first fan blade group; the second blades 120 in the second blade group are respectively and fixedly connected with the connecting part 150; the second fan blades 120 are disposed between the adjacent first fan blades 110; in the process of rotating the fixing portion 140, the second fan blade 120 in the second fan blade group can prevent the air between the adjacent first fan blades 110 from generating a vortex; the noise that air ducting produced can further be reduced, air ducting's adaptability has been improved greatly.
In this implementation, the second blade 120 is connected to the connecting portion 150 on the circumferential side of the fixing portion 140, so that the gap between the adjacent first blades 110 at the middle portion of the air guide body 100 is large, and the gap between the first blades 110 and the second blades 120 at the side of the air guide body 100 is small, that is, by providing the second blade 120, the gap between the adjacent blades at the middle portion of the air guide body 100 is large, and the gap between the adjacent blades at the side of the air guide body 100 is small; in the process of rotating the fixing part 140, the air guide body 100 can suck more air from the middle of the air guide body 100 through negative pressure, and can push the air to rotate together through more fan blades; the working efficiency of the air guide body 100 is greatly improved; meanwhile, the first fan blades 110 are arranged in the middle of the air guide body 100, the number of the fan blades arranged on the air guide body 100 can be greatly increased by arranging the first fan blades 110 and the second fan blades 120 on the edge of the air guide body 100, and the air pushing capacity of the air guide body 100 is improved.
In the present embodiment, the structure of the connection portion 150 is not limited. For example, the connection portion 150 may have a ring structure.
Here, the connecting portion 150 is fixedly connected to the first fan blade 110 of the first fan blade set, and the connecting portion 150 and the first fan blade 110 of the first fan blade set are integrated.
In this implementation manner, the second fan blades 120 in the second fan blade group are respectively and fixedly connected to the connecting portion 150, and the second fan blades 120 in the second fan blade group and the connecting portion 150 are an integrated structure; the second blade 120 and the connecting portion 150 may be integrally formed, or may be fixedly connected to form an integral structure.
Here, the structure of the second fan blade 120 is not limited. For example, the second fan blade 120 may be a bent plate-like structure. For another example, the second blades 120 extend radially away from the fixing portion 140.
For example, the second blade 120 may be made of a liquid Crystal Polymer (L liquid Crystal Polymer, L CP), so that the second blade 120 is made thinner and the mechanical strength of the second blade 120 is higher, thereby providing a larger number of second blades 120 in the same space and the same gap, and at the same time, the mechanical strength of the second blade 120 can be greatly improved under the condition that the thickness of the second blade 120 is the same, in an application scenario, the thickness of the second blade 120 is 0.4 mm.
Here, the cross-sectional shapes of the second blades 120 in the width direction may be the same or different.
Here, the distance between the second blade 120 and the first blade 110 may be the same or different.
In this embodiment, in order to further improve the operation efficiency of the air guide body 100, the number of blades of the air guide body 100 may be gradually increased in a direction from the middle of the air guide body 100 to the edge of the air guide body.
As an example, the wind guide body 100 may further include: a third fan blade group; the third blades 130 in the third blade group are respectively and fixedly connected with the connecting part 150; the third fan blade 130 is disposed between the adjacent first fan blade 110 and the adjacent second fan blade 120; in the process of rotating the fixing portion 140, the third blade 130 in the third blade group can prevent the air between the adjacent first blade 110 and the adjacent second blade 120 from generating a vortex; the noise that air ducting produced can further be reduced, air ducting's adaptability has been improved greatly.
In an example, as shown in fig. 1, the third blades 130 in the third blade group are respectively and fixedly connected to the connecting portion 150, and the connecting portion 150 and the third blades 130 in the third blade group are an integral structure.
Here, the structure of the third fan blade 130 is not limited. For example, the third blade 130 may be a bent plate-like structure. For another example, the third blades 130 extend radially away from the fixing portion 140.
As an example, the third blade 130 is made of a liquid Crystal Polymer (L liquid Crystal Polymer, L CP) so as to make the third blade 130 thinner and the third blade 130 have higher mechanical strength, so that a larger number of third blades 130 can be provided in the same space and the same gap, and the mechanical strength of the third blade 130 can be greatly improved in the case that the third blades 130 have the same thickness, in an application scenario, the third blade 130 has a thickness of 0.4 mm.
Here, the sectional shapes of the third blades 130 in the width direction may be the same or different.
Here, the distance between the third blade 130 and the first blade 110 may be the same or different; the distance between the third fan blade 130 and the second fan blade 120 may be the same or different. As an example, the distance between the adjacent blades is the same, that is, the distance between the third blade 130 and the first blade 110 is the same, and the distance between the third blade 130 and the second blade 120 is the same.
In the first example, the positions where the second fan blade 120 and the third fan blade 130 are fixedly connected to the connecting portion 150 are not limited. For example, as shown in fig. 1 and fig. 2, the second blade 120 is fixedly connected to one end of the connecting portion 150 close to the fixing portion 140, and the third blade 130 is fixedly connected to one end of the connecting portion 150 far from the fixing portion 140; that is, the second blade 120 is closer to the fixing portion 140 than the third blade 130.
Here, as shown in fig. 6, the first fan blade 110, the second fan blade 120, and the third fan blade 130 are symmetrically distributed in the height direction of the air guide body 100 with respect to the connecting portion 150, so that when the first fan blade 110, the second fan blade 120, and the third fan blade 130 push air to rotate, the first fan blade 110, the second fan blade 120, and the third fan blade 130 are uniformly stressed, and the first fan blade 110, the second fan blade 120, and the third fan blade 130 are prevented from being unevenly stressed and swinging to generate noise; the height direction of the air guide 100 is the axial direction of the rotation of the fixing part 140.
In an example one, the first fan blade 110 has a first width, the second fan blade 120 has a second width, and the third fan blade 130 has a third width; the first width, the second width and the third width may be the same or different.
As an example, the value of the first width is greater than the value of the second width, which is greater than the value of the third width; that is, the first fan blade 110 is widest and the third fan blade 130 is narrowest.
Here, the width of the fan blade means a width formed from the root of the fan blade to the end of the fan blade; as shown in fig. 2, the width of the first blade 110 is the width formed from the root 111 of the first blade to the end 112 of the first blade; the width of the second blade 120 is the width from the root 121 of the second blade to the end 122 of the second blade; the width of the third blade 130 is the width from the root 131 of the third blade to the end 132 of the third blade.
Here, the end 112 of the first blade, the end 122 of the second blade, and the end 132 of the third blade may have the same distance from the fixing portion 140, as shown in fig. 1; of course, the end 112 of the first blade, the end 122 of the second blade and the end 132 of the third blade may have different distances from the fixing portion 140.
In example one, the third blade 130 and the first portion of the first blade 110 have the same shape, and the second blade 120 and the second portion of the first blade 110 have the same shape; it can be understood that the second fan blade 120 and the third fan blade 130 are both part of the first fan blade 110; when the end 112 of the first blade, the end 122 of the second blade, and the end 132 of the third blade all have the same distance from the fixing portion 140, and the arrangement directions of the first blade 110, the second blade 120, and the third blade 130 are the same, the projections of the third blade 130 and the first portion of the first blade 110 in the circumferential direction are overlapped, and the projections of the second blade 120 and the second portion of the first blade 110 in the circumferential direction are overlapped; it can be understood that the wind guide body 100 is composed of the first fan blade, the root 111 of part of the first fan blade is removed to form the second fan blade 120 and the third fan blade 130, the first fan blade 110 with large volume is removed from the root to form the third fan blade 130, and the first fan blade 110 with small volume is removed from the root to form the second fan blade 120.
In an example one, as shown in fig. 5, the first fan blade 110 has a first inlet installation angle β 1, the second fan blade 120 has a second inlet installation angle β 2, and the third fan blade 130 has a third inlet installation angle β 3, wherein the first inlet installation angle β 1, the second inlet installation angle β 2 and the third inlet installation angle β 3 are all the same, during the rotation of the fixing portion 140, air between adjacent first fan blades 110 can enter between the first fan blade 110 and the second fan blade 120, air between the first fan blade 110 and the second fan blade 120 can enter between the first fan blade 110 and the third fan blade 130 and between the second fan blade 120 and the third fan blade 130, wind resistance can be reduced, air is prevented from generating an orbit, air is prevented from generating a vortex, and noise of the wind guiding device can be greatly reduced.
In an application scenario, the air guide body 100 includes a first blade 110, a second blade 120, and a third blade 130, the shape of the air guide body 100 is as shown in fig. 1, the diameter of the air guide body 100 is 60mm, the height of the air guide body 100 is 20mm, and the air guide body 100 is substantially a columnar structure.
Table 1: PQ data at 2000rpm (revolutions per minute) for the air guide.
Ps Q PSTP QSTP
mmAq CFM mmAq CFM
3.08 0.00 3.14 0.00
2.89 0.50 2.95 0.50
2.63 0.99 2.68 0.99
2.49 1.35 2.54 1.35
2.13 1.91 2.17 1.91
1.68 2.49 1.72 2.49
1.23 3.06 1.26 3.06
0.86 3.60 0.88 3.60
0.58 3.95 0.59 3.95
0.01 4.63 0.01 4.63
Table 2: the PQ data at 2000rpm (revolutions per minute) for the fan with only the first fan blade 110 is set.
Figure BDA0002433460010000111
In tables 1 and 2, Ps is the wind pressure of the wind guide device, mmAq is the unit millimeter water column of the wind pressure; q is the air flow of the air guide device, and CFM is the unit of the air flow per cubic foot per minute; pstp is the air pressure of the air guide device in a standard state; qstp is the wind flow of the wind guide device in a standard state; fig. 12 is a PQ curve corresponding to table 1. It can be seen from table 1, table 2 and fig. 12 that the efficiency of the air guiding device at the constant rotation of 2000rpm (revolutions per minute) is greatly improved, and the noise of the air guiding device can be controlled within 17 dBA. When the air guide device rotates at 3000rpm, 6.89CFM air flow and 7.82mmAq static pressure can be realized, and the efficiency of the air guide device is greatly improved.
In some optional implementations of the embodiments of the present application, the curvature of the first surface 113 of the first blade 110 and the curvature of the second surface 114 of the first blade 110 vary in the width direction of the first blade 110; the width direction of the first blade 110 is the direction from the root 111 to the end 112 of the first blade, as shown in fig. 7, the second surface 114 of the first blade 110 and the first surface 113 of the first blade 110 are two opposite surfaces forming the thickness of the first blade 110, as shown in fig. 8 and 9; in the process of rotating the fixing portion 140, the first fan blade 110 can prevent the air on the surface of the first fan blade 110 from generating a vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.
In the present embodiment, the structure of the air guide device is not limited. For example, the air guiding device is an axial fan, and the first fan blade 110 can make air flow along the circumferential direction of the fixing portion 140 when the fixing portion 140 rotates; the air forms a vortex on the first surface 113 and the second surface 114 to generate noise, the curvature of the first surface 113 of the first fan blade 110 and the curvature of the second surface 114 of the first fan blade 110 change in the width direction of the first fan blade 110, that is, the first surface 113 and the second surface 114 are both composed of a plurality of curved surfaces, which can reduce the vortex formed by the air on the first surface 113 and the second surface 114, thereby reducing the noise generated by the air guiding device.
In this embodiment, the cross-sectional shape of the first blade 110 is not limited. For example, the cross-sectional shape of the first blade 110 may be rectangular or elliptical.
Here, the cross-sectional shapes of the first blades 110 in the width direction of the first blades 110 may be the same or different.
In example two, the cross section of the first fan blade 110 in the circumferential direction is an airfoil shape; here, the cross section of the first blade 110 in the circumferential direction is a cross section formed by intersecting a cylindrical surface with the first blade 110; wherein, the axis of the cylindrical surface is collinear with the axis of the wind guide body 100.
In the second example, the chord length of the airfoil section may gradually increase in the width direction of the first blade 110, the thickness of the airfoil section may gradually decrease in the width direction of the first blade 110, and the area of the airfoil section may gradually increase in the width direction of the first blade 110; in the process of rotating the fixing portion 140, the first fan blade 110 can prevent the air on the surface of the first fan blade 110 from generating a vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.
The airfoil noise reduction and guide device comprises a first fan blade 110, a second fan blade 110, a first fan blade 110, a cross section A1, a cross section B1, a cross section C1 and a cross section D1, wherein the cross section B1 is formed by the intersection of a cylindrical surface of a point A2 and the first fan blade 110, the cylindrical surface of the point B intersects the first fan blade 110, the cylindrical surface of the point C intersects the first fan blade 110, the cylindrical surface of the point D intersects the first fan blade 110, the point A, the point B, the point C and the point D are sequentially located in the width direction of the first fan blade 110, the thickness H1 of the cross section A1, the thickness H2 of the cross section B1, the thickness H3 of the cross section C1 and the thickness H4 of the cross section D1 are gradually reduced as shown in fig. 10, the chord L1 of the cross section A1, the chord L2 of the cross section B1, the chord L3 of the chord of the cross section C1 and L4 of the cross section D1 are gradually increased, so that the chord 113 of the first surface 113 and the first fan blade 110 are connected in the first fan blade 110, the cross section 110 is capable of the air guide device capable of reducing the air flow resistance and the air flow of the air guide device is capable of reducing the air flow of the air guide device and increasing in the air flow guide device, and increasing in the air flow of the air guide device, and increasing the air guide device is capable of the air guide device, and increasing the air flow of the air flow device is capable of the air flow device, and increasing in the air guide device, and increasing in the air flow device, the air guide device, and increasing the air guide device, the air flow device is capable of increasing the air flow device, and increasing the air flow device increasing.
Table 3 is a data comparison table between the fan with unchanged surface curvature and the air guiding device of the present application.
Figure BDA0002433460010000131
In Table 3, RPM is the unit revolutions per minute of rotational speed; P-Max is the maximum wind pressure, and mmH2O is the unit millimeter water column of the wind pressure; Q-Max is the maximum air volume, and CFM is the unit of air flow per cubic foot per minute; dBA is the noise unit. Fig. 13 is a PQ curve corresponding to table 3. As can be seen from table 3 and fig. 13, the noise of the air guiding device of the present application is 55dBA at 4300rpm (revolutions per minute) of the fixed rotation, and the noise of the fan with unchanged surface curvature is 56dBA at 3500rpm (revolutions per minute) of the fixed rotation; in addition, the maximum wind pressure of the wind guide device reaches 12.23mmH2O, and the maximum wind volume reaches 119.2 CFM; under the condition of the same noise, the performance PQ of the air guide device is greatly improved, and the efficiency is greatly improved; simultaneously, this application air ducting is under the condition of equal rotational speed, and the noise can greatly reduced.
Of course, the chord length of the airfoil section may also be the same in the width direction of the first fan blade 110; the thickness of the airfoil section may be the same in the width direction of the first blade 110.
In the second example, as shown in fig. 11, the first blade 110 is bent in the circumferential direction, and the bending direction of the first blade 110 is the same as the rotation direction of the air guide 100; a first straight line F1 is formed between the rear edge point of the root 111 of the first blade and the axis of the fixing part 140, a second straight line F2 is formed between the rear edge point of the end 112 of the first blade and the axis of the fixing part 140, and a first included angle E is formed between the first straight line F1 and the second straight line F2; wherein the angle value of the first included angle E is greater than zero; that is, the first blades 110 are curved in the circumferential direction, and the curved direction of the first blades 110 is the same as the rotation direction of the air guide body 100, so that the curved first blades 110 can greatly reduce the noise of the air guide device.
Here, the value of the first angle E is not limited. For example, first included angle E has a value in the range of 0 degrees to 60 degrees. As another example, first included angle E has a value in a range of 30 degrees to 60 degrees. As an example, first included angle E has a value of 50 degrees.
In the air guiding device in the embodiment of the present application, in the process of rotating the fixing portion 140, the air guiding body 100 can prevent air from generating a vortex; the noise that air ducting produced can be reduced, air ducting's adaptability has been improved greatly.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An air guide device, comprising: an air guide body;
the wind guide body includes:
the fixing part is positioned in the middle of the air guide body and is used for being connected with a power mechanism for driving the air guide body to rotate;
a first fan blade group; the first fan blades in the first fan blade group are respectively and fixedly connected with the fixing part; the first fan blades in the first fan blade group are arranged at intervals in the circumferential direction of the fixing part;
in the process that the fixing part rotates, the air guide body can prevent air from generating vortex.
2. The air guide device according to claim 1, the air guide body further comprising:
the connecting parts are arranged on the peripheral sides of the fixing parts at intervals in a closed shape and are fixedly connected with the first fan blades in the first fan blade group;
a second fan blade group; the second fan blades in the second fan blade group are respectively and fixedly connected with the connecting parts; the second fan blade is arranged between the adjacent first fan blades;
in the process that the fixing part rotates, the second fan blades in the second fan blade group can prevent air between the adjacent first fan blades from generating vortex.
3. The air guide device according to claim 2, the air guide body further comprising:
a third fan blade group; the third blades in the third blade group are respectively and fixedly connected with the connecting parts; the third fan blade is arranged between the adjacent first fan blade and the second fan blade;
in the process of rotating the fixing part, the third fan blade in the third fan blade group can prevent air between the adjacent first fan blade and the second fan blade from generating vortex;
wherein, the distance between the adjacent fan blades is the same.
4. The air guiding device as claimed in claim 3, wherein the second blade is fixedly connected to an end of the connecting portion close to the fixing portion, and the third blade is fixedly connected to an end of the connecting portion away from the fixing portion;
the first fan blade, the second fan blade and the third fan blade radially extend towards the side far away from the fixed part.
5. The air guide device according to claim 3, wherein the first fan blade has a first width, the second fan blade has a second width, and the third fan blade has a third width; the value of the first width is greater than the value of the second width, which is greater than the value of the third width; the width of the fan blade is the width formed from the root of the fan blade to the end of the fan blade;
the end parts of the first fan blade, the second fan blade and the third fan blade are all at the same distance from the fixing part;
the shape of the first part of the third fan blade is the same as that of the first fan blade, and the shape of the second part of the second fan blade is the same as that of the first fan blade.
6. The air guide device according to claim 3, wherein the first blade, the second blade, and the third blade are symmetrically distributed with respect to the connecting portion in a height direction of the air guide body; the height direction of the air guide body is the axis direction of the rotation of the fixing part.
7. The air guide device according to any one of claims 3 to 6, wherein the first fan blade has a first inlet mounting angle, the second fan blade has a second inlet mounting angle, and the third fan blade has a third inlet mounting angle;
wherein the first inlet stagger angle, the second inlet stagger angle, and the third inlet stagger angle are all the same.
8. The air guide device according to claim 1, wherein a curvature of the first surface of the first blade and a curvature of the second surface of the first blade change in a width direction of the first blade; the width direction of the first fan blade is the direction from the root of the first fan blade to the end of the first fan blade, and the second surface of the first fan blade and the first surface of the first fan blade are two opposite surfaces forming the thickness of the first fan blade;
in the rotating process of the fixing part, the first fan blade can prevent air on the surface of the first fan blade from generating vortex.
9. The air guide device according to claim 8,
the section of the first fan blade in the circumferential direction is an airfoil shape; the chord length of the airfoil section is gradually increased in the width direction of the first fan blade, the thickness of the airfoil section is gradually reduced in the width direction of the first fan blade, and the area of the airfoil section is gradually increased in the width direction of the first fan blade.
10. The air guide device according to claim 9, wherein the first blade is curved in a circumferential direction while the fixing portion is rotating, and a direction of curvature of the first blade is the same as a direction of rotation of the air guide body; a first straight line is formed between the rear edge of the root of the first fan blade and the axis of the fixing part, a second straight line is formed between the rear edge of the end part of the first fan blade and the axis of the fixing part, and a first included angle is formed between the first straight line and the second straight line; wherein the angle value of the first included angle is greater than zero;
in the process that the fixing part rotates, the first fan blade can enable air to flow along the circumferential direction of the fixing part.
CN202010243936.2A 2020-03-31 2020-03-31 Air guide device Pending CN111425453A (en)

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