Fan and its air supply structure

Abstract

The present invention relates to a fan and its air supply structure. The fan includes a fan blade and an air supply structure. The air supply structure includes an air housing and a wind guiding member. The fan blade is disposed within the air housing and is capable of rotating within the air housing. Thus, air can enter through the air inlet and exit through the air outlet of an annular opening surrounding the rotation axis of the fan blade, achieving 360° circumferential air supply. Since at least two wind guiding members are disposed at the air outlet, and a single wind guiding member divides the air outlet along the direction of the rotation axis of the fan blade, the wind guiding member can be used to divide the air flow within the air outlet, enabling the air flow to be sent out between the air outlets between adjacent two wind guiding members, achieving the effect of increasing the air pressure at the air outlet, and further meeting the requirements for the wind speed and air supply distance of circumferential air supply.

Description

Technical Field

[0001] The present invention relates to the technical field of fan structures, and particularly to a fan and its air supply structure. Background Art

[0002] With the improvement of living standards, people's demand for the functions and performance diversity of fans has also increased. They prefer fans that bring a comfortable experience, and it is very necessary to have a fan that can achieve 360° circumferential air supply. However, for traditional 360° circumferential air supply fans, since the air is ejected radially in all directions, the air outlet speed decays severely, and the air supply range and distance are small, which affects the user experience. Summary of the Invention

[0003] In view of the problems of severe air outlet speed decay, small air supply range and distance, the present invention provides a fan and its air supply structure, which can ensure the air outlet speed, and thus ensure the air supply range and distance.

[0004] An air supply structure of a fan, the air supply structure includes an air housing and at least two air guiding members. The air housing is used for installing a fan blade, and an air inlet and an air outlet are formed on the air housing. The air outlet is an annular opening surrounding the rotation axis of the fan blade. At least two air guiding members are arranged in the air outlet. Different air guiding members are arranged at intervals around the rotation axis of the fan blade, and a single air guiding member divides the air outlet along the direction around the rotation axis of the fan blade.

[0005] In one embodiment, the number of the air guiding members is 3 - 8, and different air guiding members are evenly arranged at intervals around the rotation axis of the fan blade.

[0006] In one embodiment, the width of the air guiding member along the direction around the rotation axis is inversely proportional to the number of the air guiding members and directly proportional to the outer diameter of the air outlet.

[0007] In one embodiment, the width of the air guiding member along the direction around the rotation axis is 0.3 to 0.5 times the ratio of the outer diameter of the air outlet to the number of the air guiding members.

[0008] In one embodiment, the width of the air guiding member in the direction around the rotation axis of the fan blade gradually increases in the direction away from the rotation axis.

[0009] In one embodiment, the included angle between the two opposite surfaces of a single air guiding member facing the adjacent air guiding member is 60° - 150°.

[0010] In one embodiment, the air guiding member is an air guiding block, and the air guiding block is disposed in the air outlet for dividing the air outlet; or

[0011] the air guiding member is an air guiding plate, the air guiding plate is disposed in the air outlet for dividing the air outlet, and the air guiding plate is inclined with respect to the rotation axis.

[0012] In one embodiment, the air housing includes a housing and an air blowing member. The air inlet is formed on the housing, and an air outlet is formed on the housing. The air blowing member is disposed on one side of the air outlet of the housing. The air blowing member is spaced apart from the air housing to form the air outlet. The air guiding member is located between the air blowing member and the housing, and opposite ends of the air guiding member are respectively connected to the air blowing member and the housing.

[0013] In one embodiment, the surface of the air blowing member facing the housing forms a wind guiding surface; in the direction along the rotation axis towards the air outlet, the distance between the wind guiding surface and the housing tends to increase.

[0014] In one embodiment, the wind guiding surface is a convex arc surface; or

[0015] the wind guiding surface is a conical surface; or

[0016] The part of the wind guiding surface close to the rotation axis is a plane perpendicular to the rotation axis, and the part of the wind guiding surface far from the rotation axis is a conical surface or an arc surface.

[0017] In one embodiment, the included angle formed between the connection line formed between the intersection point of the wind guiding surface and the rotation axis and the outer edge of the wind guiding surface and the plane perpendicular to the rotation axis is 4° - 20°.

[0018] In one embodiment, the height difference in the direction of the rotation axis between the intersection point of the wind guiding surface and the rotation axis and the outer edge of the wind guiding surface is greater than or equal to 1 / 25 of the outer diameter of the air outlet and less than the height of the air outlet in the direction of the rotation axis of the wind blade.

[0019] In one embodiment, the height of the air outlet in the direction of the rotation axis of the wind blade is greater than or equal to 17 mm and less than 1 / 10 of the outer diameter of the air outlet.

[0020] In one embodiment, the air housing further includes a mounting member which is spaced apart from the air supply member. The spacing between the mounting member and the air supply member forms the air outlet. The air guiding member is located between the mounting member and the air supply member. One end of the air guiding member is connected to the air supply member, and the other end is connected to the mounting member. The side of the mounting member facing away from the air supply member is mounted at the air outlet of the housing.

[0021] A fan includes the air supply structure and the fan blades as described above, and the fan blades are arranged inside the air housing.

[0022] For the above-mentioned fan and its air supply structure, the fan blades are arranged inside the air housing and can rotate inside the air housing. Thus, air can enter from the air inlet and exit from the air outlet of the annular opening around the rotation axis of the fan blades, realizing 360° circumferential air supply. Since at least two air guiding members are arranged at the air outlet, and a single air guiding member divides the air outlet along the direction of the rotation axis of the fan blades, the air guiding members can divide the air flow inside the air outlet, enabling the air flow to be sent out between the air outlets between adjacent two air guiding members, achieving the effect of increasing the air pressure at the air outlet, and further meeting the requirements for the air speed and air supply distance of circumferential air supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the various elements are only drawn exemplarily in the drawings and not necessarily to the actual scale. In the drawings:

[0026] Figure 1 is a schematic structural view of the fan in one embodiment;

[0027] Figure 2 is Figure 1 the front view of the air supply member, the air guiding member and the mounting member in

[0028] Figure 3 is Figure 2 the top view of the air supply member and the air guiding member in

[0029] Figure 4Schematic diagram of the partial structures of the air supply member and the air guide member in another embodiment;

[0030] Figure 5 Schematic diagram of the partial structures of the air supply member and the air guide member in yet another embodiment;

[0031] Figures 6 to 10 For Figure 1 Airflow simulation diagrams under different numbers of air guide members in the fan shown;

[0032] Figure 11 For Figure 2 Schematic diagram of the structures of the air supply member, the air guide member, and the mounting member shown;

[0033] Figure 12 Schematic diagram of the air supply member in one embodiment;

[0034] Figure 13 Schematic diagram of the air supply member in another embodiment;

[0035] Figure 14 For Figure 1 Airflow simulation diagram of the fan shown;

[0036] Figure 15 Airflow simulation diagram of a traditional fan;

[0037] Figure 16 For Figure 1 Schematic diagram of the air supply member at different heights in the fan shown.

[0038] Explanation of reference numerals:

[0039] 10. Fan; 100. Blades; 200. Fan housing; 210. Air inlet; 220. Air outlet; 230. Housing; 232. Air outlet; 240. Air supply member; 242. Air guide surface; 250. Mounting member; 300. Air guide member; 310. Air supply surface. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0041] Refer to Figure 1 And Figure 2In one embodiment of the present invention, the fan 10 includes a fan blade 100 and an air supply structure, and the fan blade 100 is arranged in the air supply structure. Specifically, the air supply structure includes a wind shell 200 and at least two air guides 300, and the wind shell 200 is used to install the fan blade 100. The wind shell 200 is provided with an air inlet 210 and an air supply port 220, and the air supply port 220 is an annular opening around the rotation axis a of the fan blade 100. At least two of the air guides 300 are arranged in the air supply port 220, and different air guides 300 are arranged at intervals around the rotation axis a of the fan blade 100, and a single air guide 300 separates the air supply port 220 along the direction around the rotation axis a of the fan blade 100.

[0042] The above-mentioned fan 10 and its air supply structure set the fan blade 100 in the wind shell 200. The fan blade 100 can rotate in the wind shell 200, and then can take in air from the air inlet 210, and discharge air from the air outlet 220 with a circular opening around the rotation axis a of the fan blade 100, thereby realizing 360° circumferential air supply. Since at least two air guides 300 are set at the air outlet 220, and a single air guide 300 separates the air outlet 220 along the direction of the rotation axis a around the fan blade 100, the air guide 300 can separate the air flow in the air outlet 220, so that the air flow can be sent out between the air outlets 220 between two adjacent air guides 300, thereby achieving the effect of increasing the wind pressure at the air outlet 220, thereby meeting the wind speed and air supply distance requirements of the circumferential air supply. Among them, Figure 2 The arrows shown in FIG. 1 represent the direction of air flow.

[0043] In this embodiment, the fan blade 100 is an axial fan blade, and the air inlet 210 is opened below the air outlet 220. In other embodiments, the air outlet 220 can also be located at other positions of the air inlet 210, as long as the air inlet 210 can be used to enter the air and the air outlet can be used to exit the air.

[0044] See Figure 1 and Figure 2In one embodiment, the air housing 200 includes a shell 230 and an air supply member 240. The air inlet 210 is provided on the shell 230, and an air outlet 232 is provided on the shell 230. The air supply member 240 is provided on one side of the air outlet 232 of the shell 230. The air supply member 240 is spaced apart from the air housing 200 to form the air supply port 220. The air guide member 300 is located between the air supply member 240 and the shell 230. The two pairs of ends of the air guide member 300 are connected to the air supply member 240 and the shell 230, respectively. The provision of the air supply member 240 facilitates the formation of an annular air supply port 220 between the air supply member 240 and the shell 230. The wind generated by the fan blade 100 can be discharged through the air outlet 232 through the air supply port 220. And because the air guide member 300 is arranged between the air supply member 240 and the shell 230, the air guide member 300 can not only support the air supply member 240 to form an air supply port 220 between the air supply member 240 and the shell 230, but also separate the air supply port 220, increase the wind pressure of the air supply port 220, and improve the wind speed of the air supply.

[0045] Specifically, the surface of the air supply member 240 facing the housing 230 is formed as an air guide surface 242. The gap between the outer edge of the air guide surface 242 and the housing 230 forms the air outlet 220. The air guide surface 242 can cover the air outlet 232 along the direction of the rotation axis a of the fan blade 100. This allows air blown out of the air outlet 232 to flow toward the air guide surface 242 and out of the air outlet 220 along the air guide surface 242.

[0046] In one embodiment, the air housing 200 further includes a mounting member 250. The mounting member 250 is spaced apart from the air supply member 240. The distance between the mounting member 250 and the air supply member 240 forms the air supply port 220. The air guide member 300 is located between the mounting member 250 and the air supply member 240. One end of the air guide member 300 is disposed on the air supply member 240, and the other end is disposed on the mounting member 250. The mounting member 250 is mounted on the air outlet 232 of the housing 230 on a side facing away from the air supply member 240. Specifically, the mounting member 250 is an annular structure and is disposed around the air outlet 232 of the housing 230. The air outlet 232 is connected to the air supply port 220 through the space enclosed by the inner annular surface of the mounting member 250. The provision of the mounting member 250 facilitates the installation or removal of the air supply member 240 and the air guide member 300 from the housing 230. In other embodiments, the mounting member 250 may be omitted.

[0047] See also Figures 1 to 3, In one embodiment, the width B of the air guiding member 300 in the direction around the rotation axis a is inversely proportional to the number Z of the air guiding members 300 and directly proportional to the outer diameter φ of the air outlet 220. When the outer diameter φ of the air outlet 220 is relatively large, an air guiding member 300 with a relatively large width B is required to ensure the air pressure at the air outlet 220. When the number Z of the air guiding members 300 is relatively large, the width B of a single air guiding member 300 can be appropriately reduced to avoid the air guiding member 300 affecting the area of the air outlet 220, thereby affecting the air volume of the air sent from the air outlet 220. At the same time, on the one hand, it can prevent the width B of the air guiding member 300 from being too small, resulting in insufficient air pressure at the air outlet 220 and causing the air velocity and air supply distance of the air supply to fail to meet the expected requirements. On the other hand, it can avoid the width B of the air guiding member 300 from being too large, resulting in an increase in the obstruction area during the air supply process, affecting the air feeling and user experience. In addition, an air guiding member 300 with a relatively large width B will also increase the contact area between the air outlet 220 and the jet airflow, thereby increasing the dynamic and static interference between the two and generating interference noise, affecting the sound quality.

[0048] Specifically, the width B of the air guiding member 300 in the direction around the rotation axis a is 0.3 to 0.5 times the ratio of the outer diameter φ of the air outlet 220 to the number Z of the air guiding members 300. In this embodiment, the width B of the air guiding member 300 in the direction around the rotation axis a is 0.4 times the ratio of the outer diameter φ of the air outlet 220 to the number Z of the air guiding members 300. In other embodiments, the width B of the air guiding member 300 in the direction around the rotation axis a can also be other dimensions, as long as it can ensure that the air guiding member 300 is used to increase the air pressure at the air outlet 220 and thereby improve the air supply velocity.

[0049] , In one embodiment, the width B of the air guiding member 300 in the direction around the rotation axis a of the air blade 100 gradually increases in the direction away from the rotation axis a. Specifically, the air guiding member 300 is arranged between the mounting member 250 and the air supply member 240. The end of the air guiding member 300 with a relatively small width B faces the air outlet 232 of the housing 230, and the end of the air guiding member 300 with a relatively large width B faces the air outlet 220. The surface of a single air guiding member 300 facing the adjacent air guiding member 300 is the air supply surface 310, so that a single air guiding member 300 has two air supply surfaces 310 arranged back to back. The distance between the two air supply surfaces 310 forms the width B of the air guiding member 300, and the distance between the two air supply surfaces 310 gradually increases in the direction away from the rotation axis a.

[0050] During the air supply process, the air flow can be blown out of the air outlet 220 along the radial direction of the air outlet 220. By gradually increasing the width B of the air guide 300 in the direction away from the rotation axis a, so that the two air supply surfaces 310 formed by the air guide 300 are arranged at a certain angle, on the one hand, the reflection area between the air guide 300 and the air flow can be delayed, and a transitional flow guidance process can be added during the air supply process, thereby reducing the dynamic and static interference between the air flow and the air guide 300, thereby reducing air volume loss and interference noise; on the other hand, the two air supply surfaces 310 of the air guide 300 are arranged at a certain angle, and this angle can also correct the air supply angle, which can effectively improve the air supply tilt phenomenon; at the same time, the air supply surface 310 can also increase the air guide stroke, further increase the wind pressure at the air outlet 220, and thus increase the air supply speed.

[0051] In this embodiment, the angle between the two opposite surfaces of a single air guide 300 facing the adjacent air guide 300 is 60°-150°. That is, the angle between the two air supply surfaces 310 of the air guide 300 is 60°-150°. Furthermore, the angle between the surface of the single air guide 300 located in the air supply port 220 and the radial direction is 30°-75°. That is, the angle between the single air supply surface 310 and the radial direction of the air supply port 220 is 30°-75°. If the angle between the air supply surfaces 310 is too small, it will not play an effective guiding role, nor will it effectively improve the air supply tilt phenomenon; if the angle between the air supply surfaces 310 is too large, it will increase the obstruction area during the air supply process, resulting in a clear windless area in the air delivered by the air supply port 220, thereby affecting the air supply effect and reducing the user experience comfort.

[0052] See Figure 4 In another embodiment, the air guide member 300 is an air guide block, which is disposed in the air supply port 220 and is used to divide the air supply port 220. Specifically, the angle between the two air supply surfaces 310 of the air guide block can be less than 60°, for example, the angle between the two air supply surfaces 310 can be 0°.

[0053] See Figure 5 In yet another embodiment, the air guide 300 is an air guide plate, which is disposed within the air outlet 220 and serves to divide the air outlet 220. The air guide plate is tilted relative to the rotation axis a. Specifically, the angle between the two air supply surfaces 310 of the air guide 300 can be greater than 150°, for example, 180°.

[0054] In other embodiments, the air guide member 300 can also be an air guide member 300 of other shapes, as long as it can be set in the air supply port 220 and can separate the air supply port 220 to increase the wind pressure at the air supply port 220 and improve the wind speed of the air supply.

[0055] See also Figure 3 In one embodiment, the number Z of the air guide members 300 is 3-8, and the different air guide members 300 are spaced apart around the rotation axis a of the fan blade 100. Specifically, the different air guide members 300 are spaced apart evenly around the rotation axis a of the fan blade 100.

[0056] like Figures 6 to 10 ,in, Figure 6 FIG. 3 is an air flow simulation effect diagram of a fan without the air guide 300; Figure 7 FIG. 1 is an airflow simulation effect diagram of a fan with three air guide members 300 ; Figure 8 FIG. 4 is an airflow simulation effect diagram of a fan with four air guide members 300; Figure 9 FIG. 1 is an airflow simulation effect diagram of a fan with six air guide members 300 ; Figure 9 FIG. 3 is an air flow simulation effect diagram of a fan with eight air guide members 300. Figure 6 As described above, if the air guide 300 is not provided, due to the jet effect of the 360° circumferential air supply mode, the air flow dissipates faster during the jet process, resulting in insufficient wind pressure at the air supply port 220 when the air is supplied circumferentially through the air supply port 220, resulting in excessively fast dissipation of air flow energy during the air supply process, thereby failing to meet the wind speed and air supply distance requirements of the circumferential air supply.

[0057] like Figures 7 to 10 As shown, when the air guides 300 are provided, the wind pressure at the air outlet 220 can be increased, thereby achieving the purpose of increasing the air supply speed and air supply distance. At the same time, when the number Z of air guides 300 is too small, according to the relationship between the width B of the air guides 300 and the number Z of air guides 300 described above, the width B of a single air guide 300 will be large, resulting in a larger jet obstruction area, which will affect the wind feel of the fan 10 and the user experience. Alternatively, if the number Z of air guides 300 is too small, if the width B of the air guides 300 is constant, the air guide effect of the air guides 300 will be poor, and the effect of increasing the wind pressure at the air outlet 220 will not be achieved. If the number Z of air guides 300 is too large, the airflow delivered from the air outlet 220 will be dispersed into multiple parts, which will result in insufficient wind pressure between two adjacent air guides 300, which will in turn reduce the air supply speed and air supply distance. Therefore, it is important to select an appropriate number Z of outlet air guides 300 to ensure the air supply effect.

[0058] See also Figure 11, in one embodiment, the air supply member 240 is formed with a wind guiding surface 242 on the surface facing the housing 230; in the direction along the rotation axis a towards the air outlet 220, the distance between the wind guiding surface 242 and the housing 230 tends to increase. In this embodiment, the wind guiding surface 242 is a convex arc surface. In this embodiment, the distance between the wind guiding surface 242 and the housing 230 tends to increase, which can be understood as the distance between the wind guiding surface 242 and the housing 230 gradually increasing; or it can be that the distance between the wind guiding surface 242 and the housing 230 does not gradually increase. For example, when the wind guiding surface 242 is an arc surface, in the direction along the rotation axis a towards the air outlet 220, the distance between the wind guiding surface 242 and the housing 230 tends to increase.

[0059] Refer to Figure 12 , optionally, the wind guiding surface 242 is inclined in a direction away from the line of the housing 230. That is, the wind guiding surface 242 is a conical surface.

[0060] Refer to Figure 13 , optionally, the part of the wind guiding surface 242 close to the rotation axis a is a plane perpendicular to the rotation axis a, and the part of the wind guiding surface 242 away from the rotation axis a is a conical surface or an arc surface. The conical surface or the arc surface is smoothly transitioned with the plane.

[0061] For the traditional fan 10 capable of realizing 360° air supply, the air inlet 210 of the fan 10 is located below the air outlet 220. And the fan 10 capable of realizing 360° air supply is generally placed in scenarios such as on a desktop. Due to the wall jet phenomenon of the airflow generated by the impeller 100, affected by the desktop wall surface, the flow layer close to the desktop wall surface is restricted by the desktop wall surface, and the flow layer around the desktop wall surface will be continuously drawn into the fan 10, resulting in an increase in the fluid velocity gradient and a decrease in the static pressure around the fan 10. Under the action of the upper and lower pressure differences, the air sent out from the air outlet 220 is bent and adheres to the desktop wall surface, which will further increase the amplitude of the airflow falling, thus affecting the air supply direction and range of the fan 10 and reducing the wind feeling.

[0062] In the present application, as shown in Figure 14 、 Figure 15As shown in Table 1 below, after the wind generated by the wind blade 100 blows out from the air outlet 232 of the housing 230, it can blow towards the air guide surface 242. During the circumferential air guiding process, the air flow can follow an inverse parabola along the air guide surface 242 from bottom to top for the air guiding journey, thereby improving the flow direction of the air flow sent out from the air supply port 220 and reducing the possibility of the air flow falling and bending against the desktop wall surface. On the other hand, through the air guide surface 242, the air flow generated by the wind blade 100 can be guided and sent out along the air guide surface 242, reducing the eddy vortices at the cross-section of the air supply port 220, reducing the local air volume loss, and at the same time reducing the convergence and collision of the air flow at the rotation axis a of the wind blade 100, and thus being able to increase the air volume of the air supply.

[0063] Table 1 Comparison of simulation data between traditional fans and the fan 10 of the present application

[0064]

[0065] Refer to again Figure 11 , in one embodiment, a connection line is formed between the intersection point of the air guide surface 242 and the rotation axis a and the outer edge of the air guide surface 242, and the included angle α formed between this connection line and the plane perpendicular to the rotation axis a is 4° - 20°. For example, the included angle α formed between this connection line and the plane perpendicular to the rotation axis a can be 5°, 10°, 15°, etc. Among them, the connection line is the connection line of the shortest distance between the intersection point of the air guide surface 242 and the rotation axis a and the outer edge of the air guide surface 242. If the formed included angle α is too small, the inhibitory effect of the air guide surface 242 on the falling of the air flow will be reduced, and the expected air guiding effect cannot be achieved; if the formed included angle α is too large, the air guiding angle of the air guide surface 242 for the upward jet of the air flow will be too large, and after exceeding a certain distance from the fan 10, the wind feeling effect is poor, affecting the user experience.

[0066] In one embodiment, the height difference h in the direction of the rotation axis a between the intersection point of the air guide surface 242 and the rotation axis a and the outer edge of the air guide surface 242 is greater than or equal to 1 / 25 of the outer diameter φ of the air supply port 220 and less than the height H of the air supply port 220 in the direction of the rotation axis a of the wind blade 100. That is, the height difference h of the air guide surface 242 in the direction of the rotation axis a is the distance on the rotation axis a between the intersection point of the air guide surface 242 and the rotation axis a and the outer edge of the air guide surface 242. Specifically, the height difference h of the air guide surface 242 in the direction of the rotation axis a is greater than or equal to 1 / 20 of the outer diameter φ of the air supply port 220. Further, the height difference h of the air guide surface 242 in the direction of the rotation axis a is greater than or equal to 1 / 15 of the outer diameter φ of the air supply port 220.

[0067] By controlling the height difference h of the air guiding surface 242 in the direction of the rotation axis a, the protruding amplitude of the air guiding member 300 in the direction of the rotation axis a can be controlled. If the protruding amplitude is too small, the air guiding effect of the air guiding surface 242 will not be obvious, affecting the suppression effect on the falling of the air flow; if the protruding amplitude is too large, on the one hand, the air outlet angle of the air guided upward by the air guiding surface 242 will be too large, and after exceeding a certain distance from the fan 10, the wind feeling effect is poor, affecting the user experience; on the other hand, if the protruding amplitude is too large, the distance between the part of the air guiding surface 242 located at or near the rotation axis a and the wind blade 100 in the housing 230 will be too small, and the velocity fluctuation of the turbulent boundary layer between the wind blade 100 and the air guiding surface 242 will cause pressure fluctuation between the wind blade 100 and the air guiding surface 242, thereby generating turbulent boundary layer noise, affecting the peak value of the overall machine noise and the sound quality.

[0068] In one embodiment, the height H of the air outlet 220 in the direction of the rotation axis a of the wind blade 100 is greater than or equal to 17 mm and less than 1 / 10 of the outer diameter φ of the air outlet 220.

[0069] Please refer to Figure 16 , during the air supply process, since the air flow breaks away from the original restricted environment and continues to flow and diffuse in space. According to the jet characteristics, momentum and mass exchange will occur between the jet core area and the external static gas area during the jet process of the air flow. During this process, the air volume increases, but the velocity decays severely. In addition, the wind speed and air volume at the air outlet 220 are directly related to the height H of the air outlet 220. If the height H of the air outlet 220 is relatively large, the air volume will be increased, but the wind speed at the air outlet 220 will be reduced; if the height H of the air outlet 220 is too small, both the air supply wind speed and the flow rate will decrease. By reasonably setting the height of the air outlet 220 in the direction of the rotation axis a of the wind blade 100, the wind speed can reach the optimum while ensuring sufficient air volume. As shown in Table 2, six fan 10 schemes with different heights H of the air outlet 220 are analyzed by simulation means.

[0070] Table 2 Simulation data of the air supply member 240 at different heights

[0071] Solution <![CDATA[Air volume (m 3 / h)]]> Outlet air velocity (m / s) 1 484.56 9.5 2 529.88 10.3 3 566.15 10.4 4 577.68 10.3 5 583.17 10.2 6 595.25 9.5

[0072] Among them, in Scheme 1, the height H1 of the air outlet 220 is 17 mm, in Scheme 2, the height H2 of the air outlet 220 is 20 mm, in Scheme 3, the height H3 of the air outlet 220 is 23 mm, in Scheme 4, the height H4 of the air outlet 220 is 25 mm, in Scheme 5, the height H5 of the air outlet 220 is 28 mm, and in Scheme 6, the height H6 of the air outlet 220 is 31 mm.

[0073] After Figure 14As shown in Table 2, the height of the air supply outlet 220 provided by Solution 3 can achieve the optimal wind speed while ensuring sufficient air volume. That is, in this embodiment, the height of the air supply outlet 220 can be set to 23 mm.

[0074] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0075] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

[0076] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0077] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. An air supply structure of a fan, characterized in that, The air supply structure includes: An air housing, within which a fan blade is installed. An air inlet and an air outlet are formed on the air housing, and the air outlet is an annular opening surrounding the rotation axis of the fan blade; and At least two air guiding members, which are arranged within the air outlet. Different air guiding members are arranged at intervals around the rotation axis of the fan blade, and a single air guiding member divides the air outlet in the direction along the rotation axis of the fan blade; The air housing includes a housing body and an air supply member. The air inlet is formed on the housing body, and an air outlet is formed on the housing body. The air supply member is arranged on one side of the air outlet of the housing body. The air supply member is spaced from the air housing to form the air outlet. The air guiding member is located between the air supply member and the housing body, and opposite ends of the air guiding member are respectively connected to the air supply member and the housing body; The surface of the air supply member facing the housing body forms a wind guiding surface; in the direction along the rotation axis towards the air outlet, the distance between the wind guiding surface and the housing body tends to increase; The included angle formed between the connection line formed between the intersection point of the wind guiding surface and the rotation axis and the outer edge of the wind guiding surface and the plane perpendicular to the rotation axis is 4° - 20°.

2. The air supply structure of the fan according to claim 1, wherein, The number of the air guiding members is 3 - 8, and different air guiding members are evenly arranged at intervals around the rotation axis of the fan blade.

3. The air supply structure of the fan according to claim 1, characterized in that, The width of the air guiding member in the direction along the rotation axis is inversely proportional to the number of the air guiding members and directly proportional to the outer diameter of the air outlet.

4. The air supply structure of the fan according to claim 3, characterized in that, The width of the air guiding member in the direction along the rotation axis is 0.3 times to 0.5 times the ratio of the outer diameter of the air outlet to the number of the air guiding members.

5. The air supply structure of the fan according to claim 3, characterized in that, The width of the air guiding member in the direction around the rotation axis of the fan blade gradually increases in the direction away from the rotation axis.

6. The air supply structure of the fan according to claim 5, characterized in that, The included angle between the opposite surfaces of a single air guiding member facing an adjacent air guiding member is 60° - 150°.

7. The air supply structure of the fan according to claim 3, characterized in that, The air guiding member is an air guiding block, which is arranged within the air outlet and is used for dividing the air outlet; or The air guiding member is an air guiding plate, which is arranged within the air outlet and is used for dividing the air outlet, and the air guiding plate is inclined relative to the rotation axis.

8. The air supply structure of the fan according to claim 1, characterized in that The wind guiding surface is a convex arc surface; or The wind guiding surface is a conical surface; or The part of the wind guiding surface close to the rotation axis is a plane perpendicular to the rotation axis, and the part of the wind guiding surface far from the rotation axis is a conical surface or an arc surface.

9. The air supply structure of the fan according to claim 1, characterized in that, The height difference in the direction of the rotation axis between the intersection point of the wind guiding surface and the rotation axis and the outer edge of the wind guiding surface is greater than or equal to 1 / 25 of the outer diameter of the air outlet and less than the height of the air outlet in the direction of the rotation axis of the fan blade.

10. The air supply structure of the fan according to claim 1, characterized in that, The height of the air outlet in the direction of the rotation axis of the fan blade is greater than or equal to 17 mm and less than 1 / 10 of the outer diameter of the air outlet.

11. The air supply structure of the fan according to claim 1, characterized in that, The wind housing further includes a mounting member, the mounting member is spaced apart from the air supply member, a spacing between the mounting member and the air supply member forms the air supply port, the air guiding member is located between the mounting member and the air supply member, one end of the air guiding member is connected to the air supply member, the other end is connected to the mounting member, and the side of the mounting member facing away from the air supply member is mounted at the air outlet of the housing.

12. A fan, characterized in that, The fan includes: the air supply structure according to any one of claims 1-11; and a wind blade, the wind blade is disposed within the wind housing.

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