CN217842115U

CN217842115U - Axial flow fan blade and air conditioner

Info

Publication number: CN217842115U
Application number: CN202222051862.XU
Authority: CN
Inventors: 王小婷; 王伟; 李松
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-18
Anticipated expiration: 2032-08-01

Abstract

The utility model discloses an axial flow fan blade and air conditioner relates to air conditioner technical field. The axial flow fan blade comprises a hub and blades. The blade is provided with an inner edge and an outer edge oppositely, the inner edge is fixedly connected to the circumferential surface of the hub, the outer edge is provided with a bending portion, the blade is provided with a suction surface and a pressure surface oppositely, the bending portion is bent towards the direction close to the suction surface from the pressure surface, and the bending portion is used for stabilizing blade tip vortex generated on the outer edge when the axial flow fan blade rotates. Compared with the prior art, the utility model provides an axial fan blade is owing to adopted the blade of being connected with wheel hub and set up the portion of bending in the outer fringe, so can restrain breaking away from and the diffusion of apex vortex, improves apex vortex's stability, reduces the noise of production, promotes user experience.

Description

Axial flow fan blade and air conditioner

Technical Field

The utility model relates to an air conditioning technology field, in particular to axial flow fan blade and air conditioner.

Background

With the increasing living standard of people, the air conditioner has become an indispensable household appliance in home. At present, an external machine of an air conditioner generally radiates heat through axial flow fan blades, and the axial flow fan blades generate air outlet flow in the rotating process so as to discharge heat in the external machine to the outside. However, the tip vortex generated by the conventional axial flow fan blade in the rotating process can be quickly separated from the outer edge of the axial flow fan blade and diffused outwards, so that the generated noise is large, and the user experience is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be how to restrain breaking away from and the diffusion of apex vortex, improve apex vortex's stability, reduce the noise that produces, promote user experience.

In order to solve the above problems, the technical scheme of the utility model is that:

in a first aspect, the utility model provides an axial flow fan blade, including wheel hub and blade, the blade is provided with inner edge and outer fringe relatively, and inner edge fixed connection is provided with the portion of bending on wheel hub's global, and the blade is provided with suction surface and pressure surface relatively, and the portion of bending is bent towards the direction that is close to the suction surface by the pressure surface, and the portion of bending is used for stabilizing the apex vortex that produces in the outer fringe when axial flow fan blade rotates. Compared with the prior art, the utility model provides an axial fan blade is owing to adopted the blade of being connected with wheel hub and set up the portion of bending in the outer fringe, so can restrain breaking away from and spreading of apex vortex, improves apex vortex's stability, reduces the noise of production, promotes user experience.

Furthermore, the bending part comprises a straight line section and a curved line section which are connected with each other, the curved line section is arranged on one side of the straight line section, which is far away from the inner edge, the straight line section inclines towards the direction close to the suction surface from the pressure surface, and the curved line section bends towards the direction close to the hub. The part of bending can reduce the noise that apex vortex breaks away from the outer fringe and the turbulent noise that apex vortex influences the production of low reaches air current simultaneously, further improves the noise reduction effect.

Further, a preset included angle is formed between the straight line segment and a vertical plane of the axis of the hub, and the range of the preset included angle is 20-30 degrees. The reasonable preset included angle can reduce the air flow resistance, improve the drainage effect and ensure that the air can smoothly flow to the curve section.

Further, the preset included angle is 25 degrees.

Furthermore, the blade is oppositely provided with a front edge and a tail edge, the front edge, the outer edge, the tail edge and the inner edge are connected end to end, and the bent part extends to intersect with the tail edge on the outer edge. The bent part can guide the vortex of the blade tip to the tail edge and flow out of the tail edge.

Furthermore, one end of the bent part, which is far away from the tail edge, is positioned in the middle of the outer edge. The bent part guides the tip vortex from the middle part of the outer edge until the tip vortex flows out from the tail edge.

Further, the size of the bending part is gradually increased in the direction extending to the tail edge. The size of the portion of bending suits with the width of blade, and the size of the portion of bending increases along with the increase of blade width to guarantee to the drainage effect of the apex vortex of diameter gradual increase, further restrain breaking away from and the diffusion of apex vortex, noise reduction.

Further, the tail edge is concavely provided with a sunken opening towards the direction close to the front edge. The recess opening is used for guiding air to be discharged outwards so as to reduce air vortex generated by the air at the tail part of the blade, and therefore noise is reduced.

Further, the number of the recessed ports is plural, and the plural recessed ports are arranged in series. A plurality of corrugated sunken mouths can reduce the noise that the axial fan blade rotation produced as far as possible under the condition of guaranteeing the air output, promote user experience.

A second aspect, the utility model provides an air conditioner, including foretell axial fan blade, this axial fan blade includes wheel hub and blade, and the blade is provided with inner edge and outer fringe relatively, and inner edge fixed connection is global in wheel hub, and the outer fringe is provided with the portion of bending, and the blade is provided with suction surface and pressure surface relatively, and the portion of bending is bent towards the direction of being close to the suction surface by the pressure surface, and the portion of bending is used for stabilizing the apex vortex that produces in the outer fringe when axial fan blade rotates. The axial flow fan blade in the air conditioner can restrain separation and diffusion of the tip vortex, stability of the tip vortex is improved, noise generated is reduced, and user experience is improved.

Drawings

Fig. 1 is a schematic structural view of an angle of view of an axial-flow fan blade according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a blade in an axial flow fan according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of another view angle of the axial-flow fan blade according to the first embodiment of the present invention;

fig. 4 is a schematic structural view of a bending portion in an axial-flow fan blade according to a first embodiment of the present invention;

fig. 5 is a schematic view of air flowing at a viewing angle during the rotation of the axial-flow fan blade according to the first embodiment of the present invention;

fig. 6 is an air flow schematic diagram of another view angle of the axial-flow fan blade in the rotation process according to the first embodiment of the present invention.

Description of the reference numerals:

100-axial-flow fan blades; 110-a hub; 120-blades; 121-leading edge; 122-trailing edge; 123-inner edge; 124-outer edge; 125-suction surface; 126-pressure side; 127-a recessed port; 130-bending part; 131-straight line segment; 132-curved line segment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

First embodiment

Referring to fig. 1 to fig. 6 (fig. 5 and fig. 6 show the air flowing direction by hollow arrows), an embodiment of the present invention provides an axial-flow fan blade 100 for driving the air to flow. The vortex flow generator can inhibit separation and diffusion of the tip vortex flow, improve stability of the tip vortex flow, reduce noise generated, and improve user experience.

It should be noted that the axial flow fan 100 is applied to an air conditioner external unit (not shown), the air conditioner external unit is installed outdoors and connected to an air conditioner internal unit (not shown), and the air conditioner external unit and the air conditioner internal unit act together to achieve a function of regulating and controlling indoor air temperature. The outdoor unit of the air conditioner includes a condenser (not shown), a driving motor (not shown), and a casing (not shown), wherein the condenser, the driving motor, and the axial-flow fan 100 are all installed in the casing. The driving motor is connected to the axial-flow fan blade 100 to drive the axial-flow fan blade 100 to rotate. The position of the axial flow fan blade 100 corresponds to the position of a condenser, and the condenser is used for exchanging heat for a refrigerant. The axial flow fan blade 100 can form negative pressure in the rotating process to drive air to flow to form air outlet airflow, and the air outlet airflow is used for carrying out air cooling on the condenser to take away heat of the condenser, so that normal operation of the condenser is guaranteed.

The axial flow fan blade 100 includes a hub 110 and blades 120. Hub 110 is cylindric, and blade 120 fixed connection is on hub 110's global, and hub 110 can drive blade 120 and rotate to drive the air flow. Hub 110 is configured to be connected to a driving motor, and the driving motor can drive blades 120 to rotate via hub 110.

In this embodiment, the number of the blades 120 is three, the three blades 120 are disposed on the circumferential surface of the hub 110 in an annular array, and the hub 110 can drive the three blades 120 to rotate simultaneously, so that the air flows to form the outlet airflow. However, the number of the blades 120 is not limited to four, and in other embodiments, the number of the blades 120 may be four or five, and the number of the blades 120 is not particularly limited.

It should be noted that the blade 120 is provided with a leading edge 121, a trailing edge 122, an inner edge 123 and an outer edge 124, wherein the leading edge 121 and the trailing edge 122 are oppositely arranged, the inner edge 123 and the outer edge 124 are oppositely arranged, and the leading edge 121, the outer edge 124, the trailing edge 122 and the inner edge 123 are connected end to jointly enclose the contour shape of the blade 120. Specifically, the inner edge 123 is a side of the blade 120 connected to the hub 110, the outer edge 124 is a side of the blade 120 far from the hub 110, the leading edge 121 is a side of the blade 120 facing the wind during rotation, and the trailing edge 122 is a side of the blade 120 facing the wind during rotation.

In this embodiment, the inner edge 123 is fixedly connected to the circumferential surface of the hub 110, and the hub 110 can drive the whole blade 120 to rotate through the inner edge 123. The outer edge 124 is provided with a bending portion 130, the blade 120 is provided with a suction surface 125 and a pressure surface 126 relatively, the bending portion 130 is bent towards a direction close to the suction surface 125 from the pressure surface 126, and the bending portion 130 is used for stabilizing the tip vortex generated on the outer edge 124 when the axial flow fan blade 100 rotates so as to inhibit separation and diffusion of the tip vortex, improve stability of the tip vortex, reduce noise generated, and improve user experience.

Specifically, in the process that the driving motor drives the axial flow fan blade 100 to rotate, the outlet air flow flows in the direction from the suction surface 125 to the pressure surface 126 to cool the condenser, and the outer edge 124 generates the tip vortex, which flows in the direction from the front edge 121 to the tail edge 122 along the extending direction of the outer edge 124, in the process, the bending portion 130 can guide the tip vortex so that the tip vortex is always attached to the outer edge 124 to flow, so that the separation and diffusion degree of the tip vortex is reduced, the noise generated due to the separation of the tip vortex is reduced, and the stable flow of the tip vortex can reduce the influence of the tip vortex on the downstream air flow, reduce the turbulence degree of the downstream air flow, and reduce the generated turbulence noise.

The bending portion 130 includes a straight line segment 131 and a curved line segment 132 connected to each other, wherein the curved line segment 132 is disposed on a side of the straight line segment 131 away from the inner edge 123. The straight section 131 is inclined from the pressure surface 126 toward the suction surface 125, and the curved section 132 is curved toward the hub 110. Specifically, in the process of rotating the axial flow fan blade 100, one air flow on the suction surface 125 sequentially flows through the straight line segment 131 and the curved segment 132 along the inner side of the bent portion 130, the other air flow on the pressure surface 126 sequentially flows through the straight line segment 131 and the curved segment 132 along the outer side of the bent portion 130, and the two air flows join on the inner side of the curved segment 132 to form the tip vortex. In the process, because the straight line section 131 and the curved section 132 have a flow guiding effect on the tip vortex, the tip vortex is always attached to the outer edge 124 to flow, the separation and diffusion degree of the tip vortex is low, and the noise generated when the tip vortex is separated from the outer edge 124 is low; the tip vortex is stably attached to the outer edge 124 to flow, so that the tip vortex has little influence on the flow of the downstream air flow, the turbulence degree of the downstream air flow is small, and the generated turbulence noise is small; thus, the bending portion 130 can reduce noise generated by the tip vortex separating from the outer edge 124 and turbulent noise generated by the influence of the tip vortex on the downstream airflow, thereby further improving the noise reduction effect.

It is worth noting that, straightway 131 inclines, and straightway 131 and the perpendicular of wheel hub 110 axis form a preset included angle, and the range of the preset included angle is 20 degrees to 30 degrees, and the reasonable preset included angle can reduce the air flow resistance, improve the drainage effect, and ensure that the air can smoothly flow to curved section 132. For ease of understanding, the preset angle is denoted as a. In this embodiment, the preset included angle is 25 degrees, but not limited thereto, in other embodiments, the preset included angle may be 20 degrees or 25 degrees, and the size of the preset included angle is not particularly limited.

In this embodiment, the bending portion 130 extends to intersect with the trailing edge 122 on the outer edge 124, that is, the bending portion 130 can guide the tip vortex to the trailing edge 122 and outwards flow out from the trailing edge 122, in this process, the bending portion 130 always keeps the guide effect on the tip vortex, reduces the influence of the tip vortex on the downstream airflow, and reduces the turbulence noise.

In this embodiment, one end of the bending portion 130, which is far away from the trailing edge 122, is located in the middle of the outer edge 124, that is, the bending portion 130 extends from the middle of the outer edge 124 to intersect with the trailing edge 122, an initial point of the bending portion 130, which extends, is the middle of the outer edge 124, a termination point of the bending portion 130, which extends, is the trailing edge 122, and the bending portion 130 guides the tip vortex from the middle of the outer edge 124 until the tip vortex flows out from the trailing edge 122. Specifically, the width of the blade 120 is reduced by the provision of the bent portion 130, so that the air output of the axial flow fan blade 100 is affected, and the width of the blade 120 gradually increases in the direction from the leading edge 121 to the trailing edge 122, so that the width of the blade 120 at the position of the leading edge 121 is the smallest, and the bent portion 130 is only provided between the middle of the outer edge 124 and the trailing edge 122, so that the noise reduction effect is ensured, and the influence on the air output of the axial flow fan blade 100 is avoided. However, the extending starting point of the bending portion 130 can be located at a side of the middle of the outer edge 124 close to the front edge 121, or can be located at a side of the middle of the outer edge 124 close to the rear edge 122, and the extending starting point of the bending portion 130 is not particularly limited.

It should be noted that the size of the bent portion 130 is gradually increased in the direction extending to the trailing edge 122, so as to further improve the effect of suppressing the tip vortex shedding and spreading. Specifically, since the width of the blade 120 gradually increases in the direction from the leading edge 121 to the trailing edge 122, the air flow rate also gradually increases, so the tip vortex also gradually increases in diameter during the flow in the direction from the leading edge 121 to the trailing edge 122. Therefore, in the present embodiment, the size of the bending portion 130 is adapted to the width of the blade 120, and the size of the bending portion 130 is increased along with the increase of the width of the blade 120, so as to ensure the flow guiding effect for the tip vortex with the diameter gradually increasing, further suppress the separation and diffusion of the tip vortex, and reduce noise.

It is noted that the trailing edge 122 is concavely provided with a concave opening 127 towards the direction close to the leading edge 121, and the concave opening 127 is used for guiding the air to be discharged outwards so as to reduce the air vortex generated by the air at the tail of the blade 120, thereby reducing the noise.

Further, the number of recessed ports 127 is a plurality of, and a plurality of recessed ports 127 set up in succession, and the lateral wall combination of a plurality of recessed ports 127 forms the wave, and a plurality of recessed ports 127 of wave can reduce the noise that axial fan blade 100 rotated and produced as far as possible under the condition of guaranteeing the air output, promote user experience. In this embodiment, the number of the recessed ports 127 is three, but not limited thereto, and in other embodiments, the number of the recessed ports 127 may be two or four, and the number of the recessed ports 127 is not particularly limited.

The embodiment of the utility model provides an axial fan blade 100, blade 120 is provided with inner edge 123 and outer fringe 124 relatively, inner edge 123 fixed connection is on wheel hub 110 global, outer fringe 124 is provided with the portion of bending 130, blade 120 is provided with suction surface 125 and pressure surface 126 relatively, the portion of bending 130 is bent by pressure surface 126 towards the direction that is close to suction surface 125, the portion of bending 130 is used for stabilizing the apex vortex that produces on outer fringe 124 when axial fan blade 100 rotates. Compared with the prior art, the utility model provides an axial fan blade 100 is owing to adopted the blade 120 of being connected with wheel hub 110 and set up the portion of bending 130 on outer fringe 124, so can restrain the vortex of apex breaking away from and spread, improves the vortex stability of apex, reduces the noise of production, promotes user experience.

Second embodiment

The utility model provides an air conditioner (not shown) for regulate and control indoor temperature. The air conditioner comprises an air conditioner outer unit and an air conditioner inner unit, wherein the air conditioner outer unit comprises a shell, a condenser, a driving motor and axial flow fan blades 100. The basic structure and principle of the axial flow fan blade 100 and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, reference may be made to corresponding contents in the first embodiment for the part of this embodiment that is not mentioned.

In this embodiment, the air conditioner outer unit is installed outdoors, and is connected with the air conditioner indoor unit, and the air conditioner outer unit and the air conditioner indoor unit combined action to realize the function of regulation and control indoor temperature. The condenser, the driving motor and the axial flow fan blades 100 are all arranged in the shell, the driving motor is connected with the axial flow fan blades 100, and the positions of the axial flow fan blades 100 correspond to the position of the condenser. The axial flow fan 100 can form negative pressure in the rotating process to drive air to flow to form air outlet flow, and the air outlet flow can cool the condenser to take away heat of the condenser and ensure normal operation of the condenser, so that an indoor unit of the air conditioner can heat or refrigerate indoors.

The embodiment of the utility model provides an air conditioner's beneficial effect the same with the beneficial effect of first embodiment, no longer describe here.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. The axial flow fan blade is characterized by comprising a hub (110) and blades (120), wherein an inner edge (123) and an outer edge (124) are arranged on each blade (120) relatively, the inner edge (123) is fixedly connected to the peripheral surface of the hub (110), a bending part (130) is arranged on each outer edge (124), a suction surface (125) and a pressure surface (126) are arranged on each blade (120) relatively, the bending part (130) is bent by the pressure surface (126) towards the direction close to the suction surface (125), and the bending part (130) is used for stabilizing blade tip vortexes generated on the outer edges (124) when the axial flow fan blade rotates.

2. The axial-flow fan blade according to claim 1, wherein the bending portion (130) comprises a straight line section (131) and a curved section (132) which are connected with each other, the curved section (132) is disposed on one side of the straight line section (131) far away from the inner edge (123), the straight line section (131) is inclined from the pressure surface (126) to the direction close to the suction surface (125), and the curved section (132) is curved to the direction close to the hub (110).

3. The axial-flow fan blade according to claim 2, wherein a preset included angle is formed between the straight line segment (131) and a vertical plane of the axis of the hub (110), and the preset included angle ranges from 20 degrees to 30 degrees.

4. The axial-flow fan blade according to claim 3, wherein the preset included angle is 25 degrees.

5. The axial-flow fan blade according to claim 1, wherein the blade (120) is provided with a leading edge (121) and a trailing edge (122) which are opposite to each other, the leading edge (121), the outer edge (124), the trailing edge (122) and the inner edge (123) are connected end to end, and the bent portion (130) extends on the outer edge (124) to intersect with the trailing edge (122).

6. The axial-flow fan blade according to claim 5, wherein one end of the bent portion (130) far away from the trailing edge (122) is located in the middle of the outer edge (124).

7. The axial flow fan blade according to claim 5, wherein the size of the bent portion (130) is gradually increased in a direction extending to the trailing edge (122).

8. The axial fan blade according to claim 5, wherein the trailing edge (122) is concavely provided with a concave opening (127) towards a direction close to the leading edge (121).

9. The axial fan blade according to claim 8, characterized in that said recessed openings (127) are in a plurality, said recessed openings (127) being arranged in succession.

10. An air conditioner comprising the axial flow fan blade as claimed in any one of claims 1 to 9.