CN222502189U

CN222502189U - Flow guide grille, axial flow fan device, fan and air conditioner

Info

Publication number: CN222502189U
Application number: CN202421118746.8U
Authority: CN
Inventors: 刘美霞; 汤雁翔; 李亚冲; 李一枭
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2024-05-21
Filing date: 2024-05-21
Publication date: 2025-02-18
Anticipated expiration: 2034-05-21

Abstract

The utility model discloses a guide grille, an axial flow fan device, a fan and an air conditioner, and relates to the field of air guide technology. The utility model includes an air guide plate, a plurality of bionic airfoil ribs and a plurality of guide members, wherein the plurality of bionic airfoil ribs are respectively extended along the radial direction of the air guide plate to form an outwardly convex guide surface to reduce the flow resistance of air flowing through the guide surface. The plurality of guide members are arranged between two adjacent bionic airfoil ribs at intervals, and the guide member is provided with a plurality of serrations toward the outside of the guide surface to rectify the airflow flowing through the guide member. Thus, the bionic airfoil ribs reduce the flow resistance of the airflow entering the fan, and reduce the interference of the incoming turbulence on the fan blades. At the same time, the serrations can be used for rectification to reduce the noise generated by the vortex separation when the air passes through the grille, thereby reducing the aerodynamic noise of the air entering the fan as a whole, and greatly improving the user's comfort.

Description

Flow guide grille, axial flow fan device, fan and air conditioner

Technical Field

The utility model relates to the technical field of air diversion, in particular to a diversion grille, an axial flow fan device, a fan and an air conditioner.

Background

An axial flow fan refers to a fan having the same air flow direction as the axial direction of the fan, for example, an axial flow fan is generally used as a fan in an electric fan, or a fan in an external machine of an air conditioner, or the like. In addition, axial fans are often used in scenes where long-term high-speed operation is required.

However, in the running process of the current axial flow fan, corresponding noise is increased along with the increase of the rotating speed of the fan. The aerodynamic noise generated when air is sucked into the fan at a high speed rotation of the fan is a major factor of noise increase. Therefore, the axial flow fan with high pneumatic noise greatly reduces the use comfort of users.

Disclosure of utility model

The present utility model has been made in view of the above problems, and provides a grill, an axial flow fan device, a fan, and an air conditioner that overcome or at least partially solve the above problems.

Based on a first aspect of the present utility model, there is provided a guide grate comprising:

The bionic wing-shaped ribs are respectively arranged along the radial direction of the air deflector in an extending manner to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface;

The flow guiding parts are arranged between two adjacent bionic wing-shaped ribs at intervals, and a plurality of saw-tooth parts are arranged on the outer sides of the flow guiding parts towards the flow guiding surfaces so as to rectify the air flow flowing through the flow guiding parts.

In an optional summary, the bionic airfoil rib includes a gull airfoil portion and a long-ear owl airfoil portion connected to the gull airfoil portion, wherein the gull airfoil portion and the long-ear owl airfoil portion are smoothly connected.

In an alternative summary, the long-ear owl airfoil is disposed away from the deflector and is located in a high velocity air flow region of the deflector surface.

In an alternative summary, the gull airfoil is connected to the deflector and is located in the low velocity air flow region of the deflector surface.

In an optional summary, the gull wing section includes a first gull wing section rib and a second gull wing section rib, the long-ear wing section is located between the first gull wing section rib and the second gull wing section rib, wherein the first gull wing section rib is smoothly connected with the long-ear wing section rib, the long-ear wing section rib is smoothly connected with the second gull wing section rib, and one end of the first gull wing section rib, which is far away from the long-ear wing section rib, is fixed with the air deflector.

In the optional summary, the interval between two adjacent bionic wing-shaped ribs on the air deflector is 10mm-50 mm.

In an optional summary, the flow guiding member extends around a plurality of bionic wing ribs to form an annular structure, and the plurality of saw-tooth parts are densely arranged on the flow guiding member.

In an optional summary, the air guide grille further includes a connector, and the connector is located on an end surface of the bionic airfoil rib far away from the air guide plate.

In an optional summary, the connecting piece is provided with an assembly hole for installing the flow guiding grating.

Based on a second aspect of the present utility model, there is also provided an axial flow fan device comprising a guide grate as described in any of the above summary of the utility model.

Based on a third aspect of the present utility model, there is also provided a fan comprising an axial flow fan device as described in the above summary.

Based on the fourth aspect of the utility model, there is also provided an air conditioner comprising the axial flow fan device as described in the above summary.

Compared with the prior art, the air guide plate comprises an air guide plate, a plurality of bionic wing-shaped ribs and a plurality of guide pieces, wherein the bionic wing-shaped ribs are respectively arranged along the radial extension of the air guide plate to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The plurality of guide pieces are arranged between two adjacent bionic wing-shaped ribs at intervals, wherein the guide pieces face to the outer side of the guide surface, and a plurality of saw-tooth parts are arranged to rectify the air flow flowing through the guide pieces. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the air can be rectified through the saw tooth parts, so that noise generated by vortex separation when the air passes through the grille is reduced, and the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures.

In the drawings:

fig. 1 is a schematic structural view of a flow-guiding grille according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a bionic airfoil rib provided by an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a flow guiding member according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the structure at E in FIG. 1;

fig. 5 is a schematic perspective view of a serration according to an embodiment of the present utility model;

FIG. 6 is a side view of a serration structure according to an embodiment of the present utility model;

FIG. 7 is a front view of a serration structure according to an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a fitted gull airfoil provided by an embodiment of the utility model;

FIG. 9 is a schematic cross-sectional view of a fitted long-ear owl airfoil provided by an embodiment of the present utility model;

FIG. 10 is a schematic diagram of a fitted flow-guiding contact surface according to an embodiment of the present utility model;

fig. 11 is a schematic perspective view of an axial flow fan device according to an embodiment of the present utility model.

The wind deflector comprises a reference numeral 1, a wind deflector, 2, bionic wing ribs, 21, a sea gull wing part, 211, a first sea gull wing rib, 212, a second sea gull wing rib, 22, a long ear wing part, 3, a guide piece, 31, a sawtooth part, 311, a connecting surface, 312, a guide contact surface, 4, a connecting piece, 41, an assembly hole and 5, and a mounting plate.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

The axial flow fan refers to a fan with the air flow direction being the same as the axial direction of a fan blade of the fan, such as a fan used by an electric fan, a fan in an external machine of an air conditioner, and the like. It is generally applied in a scene requiring long-term high-speed operation.

However, in the running process of the current axial flow fan, corresponding noise is increased along with the increase of the rotating speed of the fan. Wherein, the air is sucked into the fan under the high-speed rotation of the fan to generate pneumatic noise, which is a main factor of noise increase. Therefore, the axial flow fan with high pneumatic noise greatly reduces the use comfort of users.

Based on the technical problems, the embodiment of the utility model is provided, and the embodiment of the utility model can comprise an air deflector 1, a plurality of bionic wing-shaped ribs 2 and a plurality of guide pieces 3, wherein the bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

Referring to fig. 1-9, an embodiment of the present utility model provides a deflector grill that may include an air deflector 1, a plurality of bionic airfoil ribs 2, and a plurality of deflectors 3. The bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3.

In the embodiment of the present utility model, the flow guiding grille may include an air guiding plate 1, a plurality of bionic wing-shaped ribs 2, and a plurality of flow guiding members 3. The wind deflector 1 is used for providing installation of the bionic wing rib 2, and the cross section shape of the wind deflector can be round. The bionic wing-shaped ribs 2 are arranged around the center of the air deflector 1 at equal angles. In some embodiments, the bionic wing rib 2 and the air deflector 1 may be fixed by welding. The structural stability between the bionic wing rib 2 and the air deflector 1 can be improved, so that the structural vibration noise of the air deflector grid can be reduced.

The bionic wing rib 2 can be understood as a rib in a wing shape imitating the wing spreading of birds, and a plurality of bionic wing ribs 2 extend along the radial direction of the air deflector 1 to form an outer convex diversion surface. That is, the flow guiding direction of the flow guiding surface is consistent with the air supply direction of the axial flow fan device. Therefore, the air entering the axial flow fan device from the guide surface can be guided, and the air flow resistance of the guide grating to the air is reduced. And the interference of the incoming flow turbulence to the fan blade of the axial flow fan device can be reduced, so that the pneumatic noise of the axial flow fan device can be reduced.

The flow guiding piece 3 is used for connecting two adjacent bionic wing-shaped ribs 2, so that the overall structural strength of the flow guiding grid can be improved. The flow guiding pieces 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals. For example, the plurality of flow guiding members 3 may be gradually densely arranged from the bionic wing rib 2 to the direction of the length away from the air guiding plate 1 near the air guiding plate 1. Wherein, the gradually dense arrangement refers to the interval between two adjacent flow guiding members 3, which gradually decreases along the length direction. The spacing between each two adjacent flow guiding elements 3 can be determined by the person skilled in the art according to the actual design requirements, and is not limited in this regard. The flow guide pieces 3 and the bionic wing-shaped ribs 2 are arranged in a staggered mode, and flow guide meshes for air to pass through are formed on the flow guide surface.

The guide member 3 is provided with a plurality of saw-tooth parts 31 facing the outer side of the guide surface to rectify the air flow flowing through the guide member 3, wherein the rectification is understood to be capable of reducing air flow disturbance generated when air enters the guide mesh and inhibiting air flow separation. Noise generated by vortex separation when air passes through the grid is avoided, so that aerodynamic noise when the air passes through the diversion grid can be further reduced.

In an alternative embodiment of the utility model, referring to fig. 1, the air guiding grille may include an air guiding plate 1, a plurality of bionic wing ribs 2, and a plurality of air guiding members 3. The bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The bionic aerofoil rib 2 may include a seagull aerofoil portion 21 and a long-ear owl aerofoil portion 22 connected with the seagull aerofoil portion 21, wherein the seagull aerofoil portion 21 and the long-ear owl aerofoil portion 22 are smoothly connected. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3.

In some alternative embodiments, referring to fig. 1, the bionic rib 2 may include a gull wing section 21 and a long-ear owl wing section 22 connected to the gull wing section 21, wherein the gull wing section 21 and the long-ear owl wing section 22 are smoothly connected. A smooth connection may refer to a smooth curve at the junction between the gull-wing airfoil 21 and the long-ear owl airfoil 22. The gull wing part 21 and the long-ear owl wing part 22 can change the pressure difference between the upper and lower sections of the bionic wing rib 2 to move the airflow to a low pressure area, thereby generating a diversion effect.

In some embodiments, the cross-sectional curve corresponding to the gull-wing airfoil 21 and the cross-sectional curve corresponding to the long-ear-wing airfoil 22 may be determined by a reverse reconstruction method. For example, the wing profile curve fitting at a position of 40% of the wing length of the wing in the wing development direction of the gull may be used. The airfoil thickness at this location varies greatly and the profile is obvious. The device is mainly used for supporting the self gravity of the seagull, is subjected to large air flow impact and is a key part for influencing the aerodynamic performance of the seagull. The gull airfoil 21 thus fitted has good flow guiding properties.

In other embodiments, an airfoil curve fit at a location along the wing deployment direction of the wing 40% of the wing length of the long-ear owl may be used to obtain a cross-sectional curve corresponding to the long-ear owl airfoil 22. The airfoil thickness at this location varies greatly and the profile is obvious. The device is mainly used for supporting the self gravity of the long-ear owl, and is subjected to large air flow impact, so that the device is a key part for influencing the pneumatic performance of the long-ear owl. Thus, the fitted long-ear owl airfoil 22 has good flow directing properties.

The flow guiding piece 3 is used for connecting two adjacent bionic wing-shaped ribs 2, so that the overall structural strength of the flow guiding grid can be improved. The flow guiding pieces 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals. For example, the plurality of flow guiding members 3 may be gradually densely arranged from the bionic wing rib 2 to the direction of the length away from the air guiding plate 1 near the air guiding plate 1. Wherein, the gradually dense arrangement refers to the interval between two adjacent flow guiding members 3, which gradually decreases along the length direction.

In some embodiments, the flow guiding surface may further divide a high-speed airflow area and a low-speed airflow area according to the air flow, where the high-speed airflow area refers to an area of the flow guiding surface near the top end of the fan blade of the axial flow fan device (may also be understood as an area far from the air guiding plate 1), and the low-speed airflow area refers to an area of the flow guiding surface near the central axis of the axial flow fan device (may also be understood as an area near the air guiding plate 1). By progressively denser arrangement is thus also understood that a plurality of said flow guides 3 are progressively denser from said low velocity air flow region into said high velocity air flow region. Thus, aerodynamic noise can be further reduced in the region where the air flow rate is large by the gradually densely arranged serrations 31.

The spacing between each two adjacent flow guiding elements 3 can be determined by the person skilled in the art according to the actual design requirements, and is not limited in this regard. The flow guide pieces 3 and the bionic wing-shaped ribs 2 are arranged in a staggered mode, and flow guide meshes for air to pass through are formed on the flow guide surface.

In an alternative embodiment of the utility model, the long-ear airfoil 22 is arranged remote from the deflector 1 and in the high-speed air flow region of the deflector surface.

In embodiments of the utility model, the long-ear owl airfoil 22 may be located away from the deflector 1, which corresponds to being located in the high-velocity air flow region of the deflector surface. The wing shape of the owl with long ears has good noise reduction performance, so that the owl can be used for mute predation at night. Thus, the aerodynamic noise of the air flow passing through the guide surface is significant in view of the high-speed air flow region. With the dense arrangement of the long-ear owl airfoil 22 and the serrations 31, aerodynamic noise in the high-velocity airflow region can be effectively reduced.

In an alternative embodiment of the utility model, the gull airfoil 21 is connected to the deflector 1 and is located in the low velocity air flow region of the deflector surface.

In the embodiment of the present utility model, the gull airfoil portion 21 may be disposed close to the air deflector 1, and may be fixed to the air deflector 1 by welding. The device is positioned in a low-speed airflow area of the flow guiding surface, and has obvious resistance-reducing and flow guiding effects in airflows with different Reynolds numbers due to good aerodynamic performance of seagulls. So that it can smoothly slide in stormy waves. Thus, the low-speed airflow region can be guided by the gull airfoil portion 21 and the serration portion 31, and the air flow resistance of the airflow passing through the guide surface can be greatly reduced.

In an alternative embodiment of the utility model, the air guide grille may include an air guide plate 1, a plurality of bionic wing ribs 2, and a plurality of air guides 3. The bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The bionic aerofoil rib 2 may include a seagull aerofoil portion 21 and a long-ear owl aerofoil portion 22 connected with the seagull aerofoil portion 21, wherein the seagull aerofoil portion 21 and the long-ear owl aerofoil portion 22 are smoothly connected. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, and a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 towards the guide surfaces so as to rectify the air flow flowing through the guide members 3. The gull wing section 21 comprises a first gull wing section rib 211 and a second gull wing section rib 212, and the long-ear wing section 22 is located between the first gull wing section rib 211 and the second gull wing section rib 212, wherein the first gull wing section rib 211 is smoothly connected with the long-ear wing section 22, the long-ear wing section 22 is smoothly connected with the second gull wing section rib 212, and one end of the first gull wing section rib 211, far away from the long-ear wing section 22, is fixed with the wind deflector 1.

In some alternative embodiments, the bionic aerofoil rib 2 may comprise a gull wing section 21 and a long-ear owl wing section 22 connected to the gull wing section 21, wherein the gull wing section 21 and the long-ear owl wing section 22 are smoothly connected. A smooth connection may refer to a smooth curve at the junction between the gull-wing airfoil 21 and the long-ear owl airfoil 22. The gull wing part 21 and the long-ear owl wing part 22 can change the pressure difference between the upper and lower sections of the bionic wing rib 2 to move the airflow to a low pressure area, thereby generating a diversion effect.

Referring to fig. 3, the guide member 3 is provided with a plurality of saw-tooth parts 31 toward the outer side of the guide surface to rectify the air flow flowing through the guide member 3, wherein the rectification is understood to be capable of reducing air flow disturbance generated when air enters the guide mesh and suppressing air flow separation. Noise generated by vortex separation when air passes through the grid is avoided, so that aerodynamic noise when the air passes through the diversion grid can be further reduced.

In some embodiments, polynomial fitting may be selected to determine the cross-sectional curve corresponding to the gull-wing airfoil 21 and the cross-sectional curve corresponding to the long-ear-owl airfoil 22, respectively. In some embodiments, a quintic polynomial (y＝a₁x⁵+a₂x⁴+a₃x³+a₄x²+a₅x+A) may be used to fit the curve corresponding to the pressure side of the gull airfoil 21, and a cubic polynomial (y=b ₁x³+b₂x²+b₃ x+b) may be used to fit the curve corresponding to the suction side of the gull airfoil 21.

In other embodiments, a quintic polynomial (y＝c₁x⁵+c₂x⁴+c₃x³+c₄x²+c₅x+C) is used to fit the curve corresponding to the pressure side of the gull-wing section 21, and a cubic polynomial (y=d ₁x³+d₂x²+d₃ x+d) is used to fit the curve corresponding to the suction side of the gull-wing section 21.

For the section curve of the gull airfoil portion 21, the coordinate point of the airfoil curve at the position of 40% of the wing length of the wing of the gull along the wing unfolding direction may be extracted in advance, and fitted by using a quintic polynomial. The cross-sectional profile of the gull airfoil 21 may be as shown in fig. 8. The coefficients of the fifth-order polynomial corresponding to the fitted pressure side curve are as follows:

a₁＝-0.0001±1.258E-5,a₂＝0.0037±1.1124*10^-4,a₃=-0.0419±0.0035;

a₄＝0.2188±0.0051,a₅=-0.3899±0.00011,A=0.6635±0.000243。

The coefficients of the cubic polynomial corresponding to the suction side curve obtained by fitting are as follows:

b₁＝0.0022±5.47*10^-5,b₂＝-0.0386±0.000129,b₃=0.1618±0.000136;

B=0.1686±0.00089。

For the section curve of the owl-shaped part, coordinate points of the wing curve at the position of 40% of the wing length of the wing of the owl along the wing unfolding direction can be extracted in advance, and fitting is carried out by adopting a quintic polynomial. The cross-sectional curve of the long-ear owl airfoil 22 may be as shown in fig. 9, wherein the coefficients of the fifth-order polynomial corresponding to the fitted pressure side curve are as follows:

c₁＝-0.0002±6.528*10^-5,c₂＝0.0043±4.653*10^-4,c₃＝-0.0397±0.00178;

c₄＝0.1878±0.00254,c₅=-0.3057,C=2.6913±0.0005;

d₁＝0.0019±6.978*10^-4,d₂＝-0.0369±5.5897*10^-4,d₃=0.1963±0.0023,

D=2.2762±0.0015。

Considering that the fitted gull wing section 21 and the long-ear owl wing section 22 need to be connected smoothly, the corresponding gull wing section 21 may further include a first gull wing rib 211 and a second gull wing rib 212, and the long-ear owl wing section 22 is located between the first gull wing rib 211 and the second gull wing rib 212, where an end of the first gull wing rib 211 away from the long-ear owl wing section 22 is fixed with the wind deflector 1. Thus, a smooth connection of the two section curves can be obtained based on the fitting. So that one end of the first gull-wing rib 211 is fixed to the wind deflector 1 and the other end of the first gull-wing rib 211 is fixed to one end of the long-ear owl wing section 22. And the other end of the long-ear owl airfoil 22 is fixed to one end of the second gull-wing rib 212, and the other end of the second gull-wing rib 212 is fixed to a connector 4 described below. In some embodiments, the first gull-wing rib 211, the long-ear owl wing section 22, and the second gull-wing rib 212 are of unitary construction.

Referring to fig. 5 and 6, the serration 31 may further include a connection surface 311 and a guide contact surface 312, and the connection surface 311 may be used for connection of two adjacent serration 31. The flow guiding contact surface 312 is used for rectifying the airflow flowing through the flow guiding surface. The shape of the flow guiding contact surface 312 may be obtained by fitting a fourth order polynomial (y=f ₁x4+f₂x3+f₃x2+f₄ x+f). For example, referring to fig. 10, coefficients of the fourth order polynomial corresponding to the flow guiding contact surface 312 obtained by fitting are as follows:

f₁＝0.0123±7.11*10^-5,f₂＝-0.2467±6.529*10^-4,f₃=1.7201±0.00021;

f₄=-4.5991±0.000251,F=5.1194±0.0001。

The plurality of saw-tooth portions 31 may be densely arranged, the flow-guiding contact surfaces 312 of the plurality of saw-tooth portions 31 form a wave shape, and the coordinate points are extracted from the tail parts of the wings of the long-ear owl, and the reconstruction fitting is performed. Referring to fig. 7, the included angle θ of the saw-tooth portion 31 and the top width e of the saw-tooth portion 31 may be varied according to the wind speed at the position of the saw-tooth portion 31. That is, the saw tooth portions 31 at different positions may have different shapes and structures. The included angle θ of the sawtooth portion 31 and the top width e of the sawtooth portion 31 may be determined according to experimental test results, and are not limited herein.

In an alternative embodiment of the utility model, as shown in fig. 4, the interval between two adjacent bionic wing-shaped ribs 2 on the air deflector 1 is 10mm-50 mm.

In the embodiment of the utility model. In order to ensure the flow guiding and noise reducing performance of the bionic wing-shaped ribs 2, the interval d between two adjacent bionic wing-shaped ribs 2 on the air deflector 1 is not smaller than 10mm and not larger than 50mm. For example, the interval d is too small, so that the production cost of the bionic wing rib 2 is increased and the air quantity flowing through the guide surface is blocked. And if the interval d is too large, the flow guiding and noise reducing performance of the bionic wing-shaped rib 2 is reduced. Therefore, the intervals between two adjacent bionic wing-shaped ribs 2 on the air deflector 1 can be 10mm, 15mm, 20mm, 50mm and the like. The person skilled in the art can determine the spacing according to the dimensions of the actual axial flow fan device, without any excessive limitation.

In an alternative embodiment of the utility model, referring to fig. 1 and 3, the flow guiding member 3 extends around a plurality of the bionic wing ribs 2 to form an annular structure.

In the embodiment of the present utility model, the guide member 3 may also have an annular structure, and may be welded to the bionic wing rib 2, so that the guide member 3 with an annular structure may facilitate reducing an assembly process, and simultaneously reduce a production cost of the guide grid. And the overall structural stability of the flow guide grating can be further improved. Thereby reducing vibration noise of the axial flow fan device due to structural problems. For example, the number of the flow guide members 3 may be set to 9 layers, 10 layers, 11 layers, or the like. The number of the flow guide members 3 can be determined by a person skilled in the art according to the specifications of the actual axial flow fan apparatus, and is not limited thereto.

In an alternative embodiment of the utility model, the air guide grille may include an air guide plate 1, a plurality of bionic wing ribs 2, a plurality of air guides 3, and a connector 4. The bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The bionic aerofoil rib 2 may include a seagull aerofoil portion 21 and a long-ear owl aerofoil portion 22 connected with the seagull aerofoil portion 21, wherein the seagull aerofoil portion 21 and the long-ear owl aerofoil portion 22 are smoothly connected. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, and a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 towards the guide surfaces so as to rectify the air flow flowing through the guide members 3.

The gull wing section 21 comprises a first gull wing section rib 211 and a second gull wing section rib 212, and the long-ear owl wing section 22 is positioned between the first gull wing section rib 211 and the second gull wing section rib 212, wherein one end of the first gull wing section rib 211 away from the long-ear owl wing section 22 is fixed with the air deflector 1. The connector 4 is located on an end face of the bionic aerofoil rib 2 away from the air deflector 1, for example, on an end of the connector 4 and the second gull aerofoil rib 212 away from the long-ear owl aerofoil section 22.

The connecting piece 4 is located on the end face of the bionic aerofoil rib 2 away from the air deflector 1, wherein the connecting piece 4 and the second gull aerofoil rib 212 are located on one end of the long-ear owl aerofoil section 22 away from the long-ear owl aerofoil section. That is, the connecting piece 4 cooperates with the air deflector 1 to fix two ends of the bionic wing-shaped ribs 2 respectively. And, the contact area between the guide grating and the mounting plate 5 of the axial flow fan device can be enlarged through the connecting piece 4, so that the connection stability of the guide grating can be improved, and the structural vibration noise can be reduced.

In an alternative embodiment of the utility model, the connecting piece 4 is provided with a fitting hole 41 for mounting the guide grating.

In the embodiment of the present utility model, in order to facilitate the disassembly and assembly of the guide grille, the connecting piece 4 is further provided with an assembly hole 41, so that a fastener passes through the assembly hole 41 to detachably connect the guide grille to the mounting plate 5 of the axial flow fan device. For example, the fasteners may be bolts and screws.

In summary, the embodiment of the utility model discloses a guide grid, which may include an air deflector 1, a plurality of bionic wing-shaped ribs 2 and a plurality of guide members 3, where the bionic wing-shaped ribs 2 extend along the radial direction of the air deflector 1 to form an outer convex guide surface so as to reduce the flow resistance of air flowing through the guide surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

Referring to fig. 11, an embodiment of the present utility model further provides an axial flow fan device, where the axial flow fan device may include a flow guiding grid according to any one of the embodiments of the present utility model.

In the embodiment of the utility model, the flow guide grille is arranged at the air inlet of the axial flow fan device. Which is fixed to the mounting plate 5 of the axial flow fan device. Wherein, the diversion grille can also be installed at the air outlet of the axial flow fan device at the same time. Thereby, the aerodynamic noise generated by the axial flow fan device in the operation process can be further reduced.

In summary, the embodiment of the utility model discloses an axial flow fan device, which may include an air deflector 1, a plurality of bionic wing-shaped ribs 2 and a plurality of guide members 3, where the bionic wing-shaped ribs 2 extend along a radial direction of the air deflector 1 to form an outward convex guide surface so as to reduce a flow resistance of air flowing through the guide surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

The air flow rate and the power of the axial flow fan device are not influenced by installing the guide grating, the noise of the whole machine can be reduced by about 0.8dB, the product performance of the axial flow fan device is greatly optimized, and the use experience of a user is improved.

The embodiment of the utility model also provides a fan, which can comprise the axial flow fan device.

In summary, the embodiment of the utility model discloses a fan, which may include an air deflector 1, a plurality of bionic wing ribs 2 and a plurality of flow guiding members 3, wherein the bionic wing ribs 2 are respectively arranged along the radial extension of the air deflector 1 to form an outwards convex flow guiding surface so as to reduce the flow resistance of air flowing through the flow guiding surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

The embodiment of the utility model also provides an air conditioner which can comprise the axial flow fan device.

In the embodiment of the utility model, the air conditioner may include an air deflector 1, a plurality of bionic wing-shaped ribs 2 and a plurality of flow guiding members 3, where the bionic wing-shaped ribs 2 are respectively arranged along the radial direction of the air deflector 1 in an extending manner to form an outwards convex flow guiding surface so as to reduce the flow resistance of air flowing through the flow guiding surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

In summary, the embodiment of the utility model discloses a flow guiding grid, an axial flow fan device, a fan and an air conditioner, which may include an air guiding plate 1, a plurality of bionic wing-shaped ribs 2 and a plurality of flow guiding members 3, wherein the bionic wing-shaped ribs 2 are respectively arranged along the radial extension of the air guiding plate 1 to form an outwards convex flow guiding surface so as to reduce the flow resistance of air flowing through the flow guiding surface. The plurality of guide members 3 are arranged between two adjacent bionic wing-shaped ribs 2 at intervals, wherein a plurality of saw-tooth parts 31 are arranged on the outer sides of the guide members 3 facing the guide surfaces so as to rectify the air flow flowing through the guide members 3. Therefore, the flow resistance of the air flow entering the fan can be reduced through the bionic wing-shaped ribs 2, and the interference of incoming flow turbulence on the fan blade is reduced. Meanwhile, the noise generated by vortex separation when the air passes through the grille can be reduced by rectifying through the saw tooth part 31, so that the pneumatic noise of the air entering the fan can be reduced as a whole. The product applicability of the axial flow fan device is improved, and the use comfort of a user is greatly improved.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It will be readily apparent to those skilled in the art that any combination of the above embodiments is possible and is thus an embodiment of the present utility model, but the present description is not limited to the details given herein.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the above description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Claims

1. A baffle grille, the baffle grille comprising:

An air deflector (1);

The bionic wing-shaped ribs (2) are respectively arranged along the radial extension of the air deflector (1) to form an outwards convex guide surface so as to reduce the flow resistance of air flowing through the guide surface;

The flow guiding device comprises a plurality of flow guiding pieces (3), wherein the plurality of flow guiding pieces (3) are arranged between two adjacent bionic wing-shaped ribs (2) at intervals, and a plurality of saw-tooth parts (31) are arranged on the outer sides of the flow guiding pieces (3) towards the flow guiding surfaces so as to rectify air flow flowing through the flow guiding pieces (3).

2. The grid according to claim 1, characterized in that the bionic aerofoil rib (2) comprises a gull-wing section (21) and a long-ear owl-wing section (22) connected to the gull-wing section (21), wherein the gull-wing section (21) and the long-ear owl-wing section (22) are smoothly connected.

3. A grid according to claim 2, characterized in that the long-ear white-powder airfoil (22) is arranged remote from the deflector (1) and in the high-speed air flow region of the deflector surface.

4. A grid according to claim 3, characterized in that the gull-wing section (21) is connected to the deflector (1) and is located in the low-velocity air flow region of the deflector surface.

5. The air guide grille according to claim 4, wherein the gull wing section (21) comprises a first gull wing rib (211) and a second gull wing rib (212), the long-ear wing section (22) is located between the first gull wing rib (211) and the second gull wing rib (212), wherein the first gull wing rib (211) is smoothly connected with the long-ear wing section (22), and the long-ear wing section (22) is smoothly connected with the second gull wing rib (212), and an end of the first gull wing rib (211) away from the long-ear wing section (22) is fixed with the air guide plate (1).

6. A grid according to claim 1, characterized in that the spacing between two adjacent bionic wing ribs (2) on the deflector (1) is between 10mm and 50 mm.

7. A grid according to claim 1, characterized in that the guide (3) extends around a number of the bionic wing ribs (2) to form a ring-shaped structure, and in that a number of the serrations (31) are densely arranged on the guide (3).

8. The air guide grille according to claim 1, further comprising a connector (4), said connector (4) being located on an end face of said bionic wing rib (2) remote from said air deflector (1).

9. A grid according to claim 8, characterized in that the connecting piece (4) is provided with fitting holes (41) for the installation of the grid.

10. An axial flow fan apparatus comprising a grid as claimed in any one of claims 1 to 9.

11. A fan comprising the axial flow fan apparatus of claim 10.

12. An air conditioner, characterized in that the air conditioner comprises the axial flow fan device according to claim 10.