CN112648237A

CN112648237A - Fan and air supply structure thereof

Info

Publication number: CN112648237A
Application number: CN202011638128.2A
Authority: CN
Inventors: 张驰; 柳洲; 梁浩; 麦焕; 刘阳清; 张晓泉
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-04-13

Abstract

The invention relates to a fan and an air supply structure thereof, wherein the fan comprises fan blades and the air supply structure, the air supply structure comprises a fan shell and an air guide piece, the fan blades are arranged in the fan shell, the fan blades can rotate in the fan shell, air can be further fed by an air inlet, and air is discharged by an air outlet with an annular opening surrounding the rotation axis of the fan blades, so that 360-degree circumferential air supply is realized. Because two at least wind guides set up in air supply opening department, and the air supply opening is separated along the direction around the axis of rotation of fan blade to single wind guide, utilize the wind guide can separate the intraoral air current of air supply for the air current can be sent out by between the air supply opening between two adjacent wind guides, realize the effect of the wind pressure of increase air supply opening department, and then satisfy the wind speed and the air supply distance requirement of circumference air supply.

Description

Fan and air supply structure thereof

Technical Field

The invention relates to the technical field of fan structures, in particular to a fan and an air supply structure thereof.

Background

Along with the improvement of the living standard, the demand of people on the function and the performance diversity of the fan is increased, the fan bringing comfortable experience is favored, and the fan capable of realizing 360-degree circumferential air supply is very necessary. However, in the conventional fan for supplying air circumferentially at 360 degrees, because the air is radially sprayed to the periphery, the air outlet speed is seriously attenuated, the air supply range and distance are small, and the user experience is influenced.

Disclosure of Invention

The invention provides a fan and an air supply structure thereof, aiming at the problems of air outlet speed attenuation and small air supply range and distance.

An air supply structure of a fan comprises an air shell and at least two air guide pieces, wherein the air shell is internally used for mounting fan blades, an air inlet and an air supply outlet are formed in the air shell, and the air supply outlet is an annular opening surrounding the rotation axis of the fan blades; at least two air guide pieces are arranged in the air supply opening, different air guide pieces are arranged at intervals around the rotating axis of the fan blade, and the air supply opening is separated by a single air guide piece along the direction around the rotating axis of the fan blade.

In one embodiment, the number of the wind guide pieces is 3-8, and different wind guide pieces are uniformly arranged around the rotation axis of the fan blade at intervals.

In one embodiment, the width of the air guide in the direction around the rotation axis is inversely proportional to the number of the air guides and is proportional to the outer diameter of the air supply opening.

In one embodiment, the width of the air guide in the direction around the rotation axis is 0.3 to 0.5 times of the ratio of the outer diameter of the air supply opening to the number of the air guide.

In one embodiment, the width of the wind guide piece in the direction around the rotation axis of the fan blade gradually increases towards the direction away from the rotation axis.

In one embodiment, the included angle between the two opposite surfaces of the air guide parts facing to the adjacent air guide parts is 60-150 degrees.

In one embodiment, the air guide member is an air guide block, and the air guide block is arranged in the air supply opening and used for dividing the air supply opening; or

The air guide piece is an air guide plate, the air guide plate is arranged in the air supply opening and used for dividing the air supply opening, and the air guide plate is obliquely arranged relative to the rotation axis.

In one embodiment, the air casing includes a casing and an air supply member, the air inlet is disposed on the casing, the casing is provided with an air outlet, the air supply member is disposed on one side of the air outlet of the casing, the air supply member and the air casing are disposed at an interval to form the air supply outlet, the air guide member is located between the air supply member and the casing, and opposite ends of the air guide member are respectively connected to the air supply member and the casing.

In one embodiment, the surface of the air supply member facing the shell is formed into an air guide surface; the distance between the air guide surface and the casing tends to increase in a direction toward the air blowing port along the rotation axis.

In one embodiment, the wind guide surface is an outward convex cambered surface; or

The air guide surface is a conical surface; or

The part of the air guide surface, which is close to the rotation axis, is a plane vertical to the rotation axis, and the part of the air guide surface, which is far away from the rotation axis, is a conical surface or an arc surface.

In one embodiment, a connecting line is formed between the intersection point of the air guide surface and the rotation axis and the outer edge of the air guide surface, and the included angle formed between the connecting line and a plane perpendicular to the rotation axis is 4-20 degrees.

In one embodiment, a height difference between an intersection point of the air guide surface and the rotation axis and an outer edge of the air guide surface in the rotation axis direction is greater than or equal to 1/25 of the outer diameter of the air supply opening and is smaller than the height of the air supply opening in the rotation axis direction of the fan blade.

In one embodiment, the height of the air supply opening along the direction of the rotating axis of the fan blade is greater than or equal to 17mm and is less than 1/10 of the outer diameter of the air supply opening.

In one embodiment, the wind casing further includes a mounting member, the mounting member is spaced from the air blowing member, the distance between the mounting member and the air blowing member forms the air blowing opening, the air guide member is located between the mounting member and the air blowing member, one end of the air guide member is connected to the air blowing member, the other end of the air guide member is connected to the mounting member, and one side of the mounting member, which faces away from the air blowing member, is installed at the air outlet of the casing.

A fan comprises the air supply structure and the fan blades, wherein the fan blades are arranged in the air casing.

According to the fan and the air supply structure thereof, the fan blades are arranged in the air shell, can rotate in the air shell, can be supplied with air from the air inlet, and can be discharged from the air outlet of the annular opening surrounding the rotation axis of the fan blades, so that 360-degree circumferential air supply is realized. Because two at least wind guides set up in air supply opening department, and the air supply opening is separated along the direction around the axis of rotation of fan blade to single wind guide, utilize the wind guide can separate the intraoral air current of air supply for the air current can be sent out by between the air supply opening between two adjacent wind guides, realize the effect of the wind pressure of increase air supply opening department, and then satisfy the wind speed and the air supply distance requirement of circumference air supply.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale. In the drawings:

FIG. 1 is a schematic diagram of a fan according to an embodiment;

FIG. 2 is a front view of the blower, the air guide and the mounting member shown in FIG. 1;

FIG. 3 is a top view of the blower and the air guide of FIG. 2;

FIG. 4 is a schematic partial structure view of an air blowing device and an air guiding device in another embodiment;

FIG. 5 is a schematic partial structure view of an air blowing member and an air guiding member in still another embodiment;

fig. 6 to 10 are simulation diagrams of airflow under different numbers of air guiding components in the fan shown in fig. 1;

fig. 11 is a schematic structural view of the air blowing member, the air guide member, and the mounting member shown in fig. 2;

FIG. 12 is a schematic structural view of an exemplary blower;

FIG. 13 is a schematic structural view of an air blowing member in another embodiment;

FIG. 14 is a simulated airflow diagram of the fan shown in FIG. 1;

FIG. 15 is a simulation diagram of airflow of a conventional fan;

fig. 16 is a schematic structural view of the blower in the fan shown in fig. 1 at different heights.

Description of reference numerals:

10. a fan; 100. a fan blade; 200. a wind shell; 210. an air inlet; 220. an air supply outlet; 230. a housing; 232. an air outlet; 240. an air supply member; 242. an air guide surface; 250. a mounting member; 300. an air guide member; 310. an air supply surface.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2, in a fan 10 according to an embodiment of the present invention, the fan 10 includes a blade 100 and an air blowing structure, and the blade 100 is disposed in the air blowing structure. Specifically, the air supply structure includes an air casing 200 and at least two air guide members 300, and the air casing 200 is used for installing the fan blades 100 therein. The wind housing 200 is provided with an air inlet 210 and an air supply outlet 220, and the air supply outlet 220 is an annular opening surrounding the rotation axis a of the fan blade 100. At least two wind guides 300 are disposed in the air supply opening 220, different wind guides 300 are disposed at intervals around the rotation axis a of the fan blade 100, and a single wind guide 300 partitions the air supply opening 220 in a direction around the rotation axis a of the fan blade 100.

According to the fan 10 and the air supply structure thereof, the fan blades 100 are arranged in the air casing 200, the fan blades 100 can rotate in the air casing 200, air can be supplied from the air inlets 210, air is discharged from the air outlets 220 with annular openings around the rotation axis a of the fan blades 100, and 360-degree circumferential air supply is achieved. Because at least two air guides 300 are arranged at the air supply opening 220, and the air supply opening 220 is separated by a single air guide 300 along the direction around the rotation axis a of the fan blade 100, the air flow in the air supply opening 220 can be separated by the air guide 300, so that the air flow can be sent out from the air supply opening 220 between two adjacent air guides 300, the effect of increasing the air pressure at the air supply opening 220 is realized, and the requirements of the air speed and the air supply distance of circumferential air supply are further met. Wherein the arrows shown in fig. 2 represent the airflow direction.

In this embodiment, the fan blade 100 is an axial flow fan blade, and the air inlet 210 is disposed below the air outlet 220. In other embodiments, the air supply outlet 220 may also be located at other positions of the air inlet 210, as long as air can be supplied from the air inlet 210 and air can be discharged from the air outlet.

Referring to fig. 1 and 2, in an embodiment, the wind casing 200 includes a casing 230 and a wind blowing member 240, the wind inlet 210 is disposed on the casing 230, the casing 230 is disposed with a wind outlet 232, the wind blowing member 240 is disposed on one side of the wind outlet 232 of the casing 230, and the wind blowing member 240 and the wind casing 200 are disposed at an interval to form the wind blowing outlet 220. The air guide 300 is located between the air blowing member 240 and the casing 230, and two pairs of two ends of the air guide 300 are respectively connected to the air blowing member 240 and the casing 230. The provision of the blowing member 240 facilitates the formation of the blowing port 220 having an annular opening with the casing 230. Wind generated by the fan 100 can be discharged from the air outlet 232 through the air supply outlet 220. Moreover, since the air guide 300 is disposed between the air blowing member 240 and the casing 230, the air guide 300 can support the air blowing member 240, so that the air blowing opening 220 is formed between the air blowing member 240 and the casing 230, and the air blowing opening 220 can be separated, thereby increasing the air pressure of the air blowing opening 220 and increasing the air blowing speed.

Specifically, the surface of air blowing member 240 facing casing 230 is formed as air guide surface 242, and the gap between the outer edge of air guide surface 242 and casing 230 forms air blowing port 220. The wind guide surface 242 can cover the wind outlet 232 along the direction of the rotation axis a of the fan blade 100. So that the wind blown out from the wind outlet 232 can be blown toward the wind guide surface 242 and blown out from the wind inlet 220 along the wind guide surface 242.

In one embodiment, the wind housing 200 further includes a mounting member 250, the mounting member 250 is spaced apart from the air blowing member 240, the air blowing opening 220 is formed by a distance between the mounting member 250 and the air blowing member 240, the air guide member 300 is located between the mounting member 250 and the air blowing member 240, one end of the air guide member 300 is disposed on the air blowing member 240, the other end of the air guide member is disposed on the mounting member 250, and a side of the mounting member 250 opposite to the air blowing member 240 is mounted at the air outlet 232 of the housing 230. Specifically, the mounting member 250 is a ring-shaped structure, and the ring-shaped mounting member 250 is disposed around the air outlet 232 of the housing 230. The air outlet 232 is communicated with the air supply outlet 220 through a space surrounded by the inner annular surface of the mounting member 250. The installation or removal of the blower 240 and the air guide 300 to or from the casing 230 is facilitated by the installation of the mounting member 250. In other embodiments, the mount 250 may also be omitted.

Referring to fig. 1 to 3, in an embodiment, a width B of the wind guide 300 in a direction around the rotation axis a is inversely proportional to the number Z of the wind guide 300 and is directly proportional to an outer diameter Φ of the air blowing opening 220. When the outside diameter phi of the air supply opening 220 is large, the air guide 300 with the width B large is needed so as to ensure the air pressure at the air supply opening 220; when the number Z of the air guides 300 is large, the width B of the single air guide 300 can be appropriately reduced, and the air guide 300 is prevented from affecting the area of the air outlet 220 and further affecting the amount of air blown by the air outlet 220. Meanwhile, on one hand, the air guide member 300 can be prevented from being too small in width B, so that the air pressure at the air supply outlet 220 is insufficient, and the air speed and the air supply distance of the supplied air cannot meet the expected requirements; on the other hand, the problem that the air guide piece 300 is too large in width B, so that the blocking area is increased in the air supply process, and the wind sensation and the user experience are influenced is avoided. In addition, the air guide 300 with the larger width B also increases the contact area between the air supply opening 220 and the jet air flow, thereby increasing the dynamic and static interference between the air supply opening and the jet air flow, generating interference noise and affecting the sound quality.

Specifically, the width B of the air guide 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 blowing port 220 to the number Z of the air guide 300. In this embodiment, the width B of the air guide 300 in the direction around the rotation axis a is 0.4 times the outer diameter Φ of the air blowing ports 220 and the number Z of the air guide 300. In other embodiments, the width B of the air guide 300 along the direction around the rotation axis a may be other dimensions, as long as the effect of increasing the air pressure at the air supply outlet 220 and further increasing the air supply speed by using the air guide 300 can be ensured.

In one embodiment, the width B of the wind guide 300 in the direction around the rotation axis a of the fan blade 100 gradually increases toward a direction away from the rotation axis a. Specifically, the air guide 300 is disposed between the mounting member 250 and the air blowing member 240, and one end of the air guide 300 having a smaller width B is directed to the air outlet 232 of the casing 230, and one end of the air guide 300 having a larger width B is directed to the air blowing port 220. The surface of the single air guide 300 facing the adjacent air guide 300 is an air supply surface 310, so that the single air guide 300 has two air supplies main310 arranged oppositely. The distance between the two air blowing surfaces 310 is formed to be the width B of the air guide 300, and the distance between the two air blowing surfaces 310 gradually increases in a direction away from the rotation axis a.

Because the fan blades 100 can blow air out of the air blowing openings 220 along the radial direction of the air blowing openings 220 in the air blowing process. The width B of the air guide piece 300 is gradually increased along the direction far away from the rotation axis a, so that two oppositely arranged air supply surfaces 310 formed by the air guide piece 300 are arranged at a certain angle, on one hand, the reflection area between the air guide piece 300 and the air flow can be delayed, a transitional flow guide process is added in the air supply process, the dynamic and static interference between the air flow and the air guide piece 300 is reduced, the air volume loss is reduced, and the interference noise is reduced; on the other hand, the two air supply surfaces 310 of the air guide 300 are arranged at a certain angle, and the angle can also play a role in correcting the air supply angle and effectively improve the air supply inclination phenomenon; meanwhile, the air guide stroke can be increased by using the air supply surface 310, and the air pressure at the air supply outlet 220 is further increased, so that the air supply speed is increased.

In this embodiment, the included angle between the two opposite surfaces of a single air guide 300 facing the adjacent air guide 300 is 60 ° to 150 °. Namely, the included angle between the two air supply surfaces 310 of the air guide 300 is 60 to 150 degrees. Further, the surface of the single air guide 300 inside the air blowing opening 220 forms an angle of 30-75 ° with the radial direction. I.e. the angle of the single blowing surface 310 to the radial direction of the blowing opening 220 is 30-75 deg.. If the included angle between the air supply surfaces 310 is too small, the effective flow guiding effect cannot be achieved, and the air supply inclination phenomenon cannot be effectively improved; if the included angle between the air supply surfaces 310 is too large, the blocking area in the air supply process can be increased, and the air supplied by the air supply outlet 220 is thin and windless, so that the air supply effect is influenced, and the user experience comfort is reduced.

Referring to fig. 4, in another embodiment, the wind guide 300 is a wind guide block disposed in the air blowing opening 220 and used for dividing the air blowing opening 220. Specifically, the angle between the two blowing surfaces 310 of the air guide block may also be smaller than 60 °, for example, the angle between the two blowing surfaces 310 may be 0 °.

Referring to fig. 5, in another embodiment, the air guide 300 is an air guide plate, the air guide plate is disposed in the air supply opening 220 and is used for dividing the air supply opening 220, and the air guide plate is disposed in an inclined manner with respect to the rotation axis a. Specifically, the angle between the two air supply surfaces 310 of the air guide 300 may be greater than 150 °, for example, 180 °.

In other embodiments, the air guide 300 may be another shape of air guide 300, as long as it can be disposed in the air blowing port 220 and can partition the air blowing port 220, so as to increase the air pressure at the air blowing port 220 and increase the air speed of the air blowing.

Referring to fig. 3, in an embodiment, the number Z of the wind guide members 300 is 3 to 8, and different wind guide members 300 are arranged at intervals around the rotation axis a of the fan blade 100. Specifically, the different wind guide members 300 are uniformly spaced around the rotation axis a of the fan blade 100.

As shown in fig. 6 to 10, fig. 6 is an air flow simulation effect diagram of a fan without the air guide 300; fig. 7 is a diagram illustrating an effect of simulating airflow of a fan with three air guides 300; fig. 8 is a diagram illustrating an effect of simulating airflow of a fan in which the air guide 300 is four; fig. 9 is an air flow simulation effect diagram of a fan with six air guides 300; fig. 9 is an air flow simulation effect diagram of a fan in which the air guide 300 is eight. At present, traditional fan is as shown in fig. 6, if do not set up air guide 300, because the efflux effect of 360 circumference air supply modes influences, the air current is very fast at efflux in-process dissipation speed, and the air pressure of supply-air outlet 220 department is not enough when can leading to supplying air along circumference through supply-air outlet 220, leads to at air supply in-process air current energy dissipation speed too fast to can't satisfy the wind speed and the air supply distance requirement of circumference air supply.

As shown in fig. 7 to 10, when the air guide 300 is provided, the wind pressure at the air supply port 220 can be increased, and the air supply speed and the air supply distance can be increased. Meanwhile, when the number Z of the air guides 300 is too small, the width B of a single air guide 300 is large according to the relationship between the width B of the air guide 300 and the number Z of the air guides 300, so that the blocking area of the jet flow is large, and the wind sensation and the user experience of the fan 10 are affected; or, if the number Z of the 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 is poor, and the effect of increasing the air pressure at the air supply outlet 220 cannot be achieved; when the number Z of the air guides 300 is too large, the airflow sent out by the air supply opening 220 is dispersed into a plurality of parts, which may result in insufficient wind pressure between two adjacent air guides 300, and may reduce the air supply speed and the air supply distance. Therefore, the number Z of the outlet air guides 300 is selected appropriately, thereby ensuring the air supply effect.

Referring to fig. 11, in an embodiment, a surface of the blowing element 240 facing the housing 230 is formed as a wind guiding surface 242; the distance between the air guide surface 242 and the casing 230 tends to increase in a direction toward the air blowing port 220 along the rotation axis a. In this embodiment, the wind guide surface 242 is an outwardly convex arc surface. In the present embodiment, the distance between the wind guide surface 242 and the casing 230 tends to increase, which can be understood as that the distance between the wind guide surface 242 and the casing 230 gradually increases; the distance between the air guide surface 242 and the casing 230 may not be gradually increased, and when the air guide surface 242 is an arc surface, the distance between the air guide surface 242 and the casing 230 may be increased in a direction toward the air blowing port 220 along the rotation axis a.

Referring to fig. 12, optionally, the wind guide surface 242 is disposed obliquely away from the line of the housing 230. That is, the air guide surface 242 is a conical surface.

Referring to fig. 13, optionally, a portion of the wind guiding surface 242 close to the rotation axis a is a plane perpendicular to the rotation axis a, and a portion of the wind guiding surface 242 away from the rotation axis a is a conical surface or a curved surface. The conical surface or the cambered surface and the plane are in smooth transition.

Due to the conventional fan 10 capable of supplying air at 360 °, the air inlet 210 of the fan 10 is located below the air supply outlet 220. The fan 10 capable of supplying air at 360 degrees is generally placed in a scene such as a desktop, the wall-attached jet phenomenon of airflow generated by the fan blades 100 is influenced by the desktop wall, and the flow layer close to the desktop wall is continuously sucked into the fan 10 due to the limitation of the desktop wall, so that the fluid velocity gradient around the fan 10 is increased, and the static pressure is reduced. Under the action of the upper and lower pressure differences, the air delivered from the air delivery port 220 is bent and attached to the wall surface of the desk, so that the falling range of the airflow is further increased, the air delivery direction and range of the fan 10 are influenced, and the wind sensation is reduced.

In the present application, as shown in fig. 14, 15 and table 1 below, the wind generated by the wind blade 100 can be blown out to the wind guide surface 242 after being blown out from the wind outlet 232 of the housing 230. In the circumferential direction, the airflow is guided along the air guide surface 242 in an inverse parabolic downward-upward air guide stroke, so that the flow direction of the airflow sent out by the air supply outlet 220 is improved, and the possibility that the airflow falls and bends to be attached to the wall surface of the desktop is reduced. On the other hand, the wind guide surface 242 can guide and send the airflow generated by the fan blade 100 along the wind guide surface 242, so that the vortex at the section of the air supply outlet 220 is reduced, the local air quantity loss is reduced, meanwhile, the convergence and collision of the airflow at the rotation axis a of the fan blade 100 are reduced, and the air quantity of the supplied air can be increased.

TABLE 1 comparison of simulation data for conventional fan and fan 10 of the present application

Referring to fig. 11 again, in an embodiment, a connection line is formed between an intersection point of the wind guide surface 242 and the rotation axis a and the outer edge of the wind guide surface 242, and an included angle α formed between the connection line and a plane perpendicular to the rotation axis a is 4 ° to 20 °. For example, the angle α formed between this line and a plane perpendicular to the axis of rotation a may be 5 °, 10 °, 15 °, or the like. The connection line is a connection line of a shortest distance between an intersection point of the air guide surface 242 and the rotation axis a and an outer edge of the air guide surface 242. If the included angle α is too small, the effect of the air guide surface 242 on suppressing the falling of the air flow is reduced, and the expected air guide effect cannot be achieved; if the included angle α formed is too large, the air guide angle of the air guide surface 242 in the air jet flow direction is too large, and after the included angle exceeds a certain distance from the fan 10, the wind sensation effect is poor, and the user experience is affected.

In one embodiment, a height difference H between an intersection point of the wind guide surface 242 and the rotation axis a and an outer edge of the wind guide surface 242 in the direction of the rotation axis a is greater than or equal to 1/25 of the outer diameter Φ of the air blowing opening 220 and is smaller than a height H of the air blowing opening 220 in the direction of the rotation axis a of the fan blade 100. That is, the height difference h of the air guide surface 242 in the direction of the rotation axis a is a 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 blowing 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 blowing port 220.

The height difference h of the air guide surface 242 in the direction of the rotation axis a can be controlled, so that the protruding amplitude of the air guide 300 in the direction of the rotation axis a can be controlled, and if the protruding amplitude is too small, the air guide effect of the air guide surface 242 will be unobvious, and the effect of inhibiting the falling of the air flow is affected; if the protruding range is too large, on one hand, the air outlet angle guided upwards by the air guide surface 242 is too large, and after a certain distance from the fan 10 is exceeded, the wind sensation effect is poor, and the user experience is influenced; on the other hand, too large protrusion amplitude causes too small distance between the part of the wind guide surface 242 at or near the rotation axis a and the fan blades 100 in the casing 230, and the speed fluctuation of the turbulent boundary layer between the fan blades 100 and the wind guide surface 242 causes the pressure fluctuation between the fan blades 100 and the wind guide surface 242, thereby generating turbulent boundary layer noise and affecting the noise peak value and the sound quality of the whole machine.

In one embodiment, the height H of the air supply opening 220 along the direction of the rotation axis a of the fan blade 100 is greater than or equal to 17mm and is less than 1/10 of the outer diameter phi of the air supply opening 220.

Referring to fig. 16, during the air blowing process, the air flow is separated from the original limited environment and continuously spreads in the space. According to the jet characteristics, the jet core area and the external static gas area can exchange momentum and mass in the jet flow injection process, the air quantity is increased in the process, but the speed is seriously attenuated. In addition, the wind speed and the wind volume at the air blowing opening 220 are directly related to the height H of the air blowing opening 220. If the height H of the air supply opening 220 is large, the air volume will be increased, but the air speed at the air supply opening 220 will be reduced; if the height H of the air outlet 220 is too small, the air flow speed and flow rate may be decreased. The height of the air supply outlet 220 in the direction of the rotation axis a of the fan blade 100 is reasonably set, so that the optimal wind speed can be ensured under the condition of sufficient wind quantity. As shown in table 2, the fan 10 patterns with different heights H of the 6 sets of the air blowing ports 220 were analyzed by simulation.

Table 2 simulation data for air mover 240 at different heights

Scheme(s)	Air volume (m)³/h)	Outlet wind speed (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

In the embodiment 1, the height H1 of the air blowing opening 220 is 17mm, the height H2 of the air blowing opening 220 is 20mm in the embodiment 2, the height H3 of the air blowing opening 220 is 23mm in the embodiment 3, the height H4 of the air blowing opening 220 is 25mm in the embodiment 4, the height H5 of the air blowing opening 220 is 28mm in the embodiment 5, and the height H6 of the air blowing opening 220 is 31mm in the embodiment 6.

As shown in fig. 14 and table 2, the height of the air outlet 220 provided in the embodiment 3 can optimize the wind speed while ensuring sufficient air volume. That is, in the present embodiment, the height of the blowing port 220 may be set to 23 mm.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. An air supply structure of a fan, characterized in that, the air supply structure includes:

the fan blade air conditioner comprises a fan shell, a fan blade; and

the air supply device comprises at least two air guide pieces, wherein the air guide pieces are arranged in the air supply opening, different air guide pieces are arranged at intervals around the rotating axis of the fan blade, and the air supply opening is separated by a single air guide piece along the direction around the rotating axis of the fan blade.

2. The fan blowing structure according to claim 1, wherein the number of the wind guide members is 3 to 8, and different wind guide members are arranged at regular intervals around the rotation axis of the fan blade.

3. The fan blowing structure according to claim 1, wherein a width of the air guide in a direction around the rotation axis is inversely proportional to the number of the air guides and is proportional to an outer diameter of the blowing port.

4. The fan blowing structure according to claim 3, wherein a width of the air guide in a direction around the rotation axis is 0.3 to 0.5 times a ratio of an outer diameter of the blowing port to the number of the air guide.

5. The fan blowing structure according to claim 3, wherein a width of the air guide in a direction around a rotation axis of the fan blade is gradually increased in a direction away from the rotation axis.

6. The fan blowing structure according to claim 5, wherein an angle between two opposite surfaces of a single air guide facing an adjacent air guide is 60 ° to 150 °.

7. The fan blowing structure according to claim 3, wherein the air guide is an air guide block provided in the blowing port to divide the blowing port; or

8. The fan blowing structure of any one of claims 1 to 7, wherein the fan casing includes a casing and a blowing member, the air inlet is opened in the casing, the casing is opened with an air outlet, the blowing member is disposed at one side of the air outlet of the casing, the blowing member and the fan casing are spaced apart from each other to form the blowing opening, the air guide member is disposed between the blowing member and the casing, and opposite ends of the air guide member are respectively connected to the blowing member and the casing.

9. The fan blowing structure according to claim 8, wherein a surface of the blowing member facing the casing is formed as an air guide surface; the distance between the air guide surface and the casing tends to increase in a direction toward the air blowing port along the rotation axis.

10. The fan blowing structure according to claim 9, wherein the air guide surface is an outwardly convex curved surface; or

The air guide surface is a conical surface; or

11. The fan blowing structure according to claim 9, wherein a line formed between an intersection of the air guide surface and the rotation axis and an outer edge of the air guide surface makes an angle of 4 ° to 20 ° with a plane perpendicular to the rotation axis.

12. The fan blowing structure according to claim 9, wherein a height difference in the direction of the rotation axis between an intersection of the air guide surface and the rotation axis and an outer edge of the air guide surface is greater than or equal to 1/25 of an outer diameter of the blowing port and less than a height of the blowing port in the direction of the rotation axis of the fan blade.

13. The fan blowing structure according to claim 8, wherein a height of the blowing port in a direction along a rotation axis of the fan blade is greater than or equal to 17mm and is less than 1/10 of an outer diameter of the blowing port.

14. The fan blowing structure of claim 8, wherein the fan casing further includes a mounting member, the mounting member is spaced apart from the blowing member, a gap between the mounting member and the blowing member forms the blowing port, the air guide member is located between the mounting member and the blowing member, one end of the air guide member is connected to the blowing member, the other end of the air guide member is connected to the mounting member, and a side of the mounting member facing away from the blowing member is mounted at the blowing port of the casing.

15. A fan, characterized in that the fan comprises:

an air supply structure as recited in any one of claims 1-14; and

the fan blades are arranged in the wind shell.