Fan assembly and blowing device

Abstract

The utility model discloses a fan assembly and an air blowing device. The fan assembly comprises a fan shell, an assembling base, a motor assembly and fan blades. The assembly seat is arranged in the fan shell, and the assembly seat is connected with the fan shell through a plurality of stationary blades; the motor assembly is assembled in the fan shell, and the motor assembly is connected with the assembling base. The fan blades are connected with the motor assembly; flow guide sawteeth are formed at the ends, facing the fan blades, of the multiple static blades. Flow guide sawteeth are formed at one end, facing the fan blades, of each stationary blade. The airflow flowing out of the fan blades has rotating potential energy, and the airflow with the rotating potential energy can form vortex. The flow guide sawteeth are arranged on the stator blade, when the flow guide sawteeth make contact with the vortex, the vortex with the large scale is scattered into a plurality of small vortexes, when the small vortexes make contact with the stator blade in a colliding mode, rotation potential energy is smaller, and pneumatic noise formed by colliding is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of fans, and in particular to a fan assembly and a blowing device. Background Art

[0002] In the hot summer, fans have become essential items for people to eliminate heat. Along with people's demand for convenient use, more lightweight and portable fans are increasingly favored by people.

[0003] In the prior art, a fan motor and fan blades are arranged inside the fan. Among them, the fan motor is fixed inside the fan housing, and the fan motor is connected to the fan blades through a rotating shaft. The rotation of the fan blades drives the air flow to move. However, the air flow does not move straight forward, but makes a rotational movement under the push of the fan blades. In order to reduce the potential energy of the rotational movement of the air flow and improve the ability of the air flow to move directionally, static blades are arranged in front of the fan blades to physically eliminate the rotational potential energy of the air flow.

[0004] The inventor of the present invention found in the research that: the air flow flowing out of the fan blades contacts the static blades in a collision manner to cancel the rotational potential energy. In this way, a large amount of aerodynamic noise will be generated at the moment when the air flow contacts the static blades. Utility Model Content

[0005] The purpose of this application is to provide a fan assembly and a blowing device that can balance the quality of the fan blades and make the rotation of the fan blades more stable.

[0006] An embodiment of this application provides a fan assembly, including:

[0007] A fan housing;

[0008] An assembly seat, the assembly seat is arranged inside the fan housing, and the assembly seat is connected to the fan housing through a plurality of static blades;

[0009] A motor assembly, the motor assembly is assembled inside the fan housing, and the motor assembly is connected to the assembly seat;

[0010] Fan blades, the fan blades are connected to the motor assembly;

[0011] One end of the plurality of static blades facing the fan blades is formed with guide sawteeth.

[0012] Optionally, a plurality of moving blades are arranged on the fan blades, and trailing edge sawteeth are arranged at one end of the plurality of moving blades facing the assembly seat.

[0013] Optionally, each of the plurality of stationary blades extends along the inner surface of the fan housing in a curved manner, each of the plurality of moving blades extends along the hub surface of the fan blades in a curved manner, and the bending direction of the plurality of stationary blades is opposite to the rotation direction of the plurality of moving blades.

[0014] Optionally, the tooth marks of the flow guiding saw teeth are inclined; and / or,

[0015] the tooth marks of the trailing edge saw teeth are inclined.

[0016] Optionally, the inclination directions of the tooth marks of the flow guiding saw teeth and the tooth marks of the trailing edge saw teeth are the same; or,

[0017] the inclination directions of the tooth marks of the flow guiding saw teeth and the tooth marks of the trailing edge saw teeth are opposite.

[0018] Optionally, the tooth marks of the flow guiding saw teeth are inclined towards the fan housing, and the tooth marks of the trailing edge saw teeth are inclined towards the fan housing; or,

[0019] the tooth marks of the flow guiding saw teeth are inclined towards the fan housing, and the tooth marks of the trailing edge saw teeth are inclined towards the assembly seat; or,

[0020] the tooth marks of the flow guiding saw teeth are inclined towards the assembly seat, and the tooth marks of the trailing edge saw teeth are inclined towards the fan housing.

[0021] Optionally, the tooth marks of the flow guiding saw teeth and the tooth marks of the trailing edge saw teeth are correspondingly matched; or,

[0022] the tooth marks of the flow guiding saw teeth and the tooth marks of the trailing edge saw teeth are misaligned and matched.

[0023] Optionally, the ratio of the length of the stationary blade to the length of the moving blade is 1.1 - 2.8; and / or,

[0024] the ratio of the number of the stationary blades to the number of the moving blades is 0.5 - 1.

[0025] Optionally, the assembly seat includes: a connecting cylinder, a connecting ring and a hollow tube. The connecting cylinder is arranged inside the fan housing. The connecting cylinder is connected to the fan housing through the plurality of stationary blades. The connecting ring is arranged inside the connecting cylinder. The hollow tube is connected to the connecting ring, and the motor assembly is connected to the hollow tube.

[0026] To achieve the purpose of the present application, an embodiment of the present application further provides a blowing device, and the blowing device is assembled with the fan assembly described in any one of the above.

[0027] The beneficial effects of the embodiments of the present application are as follows: A plurality of stationary blades are provided between the fan housing and the mounting seat, and a flow guiding serration is formed at one end of each stationary blade facing the fan blade. The air flow flowing out from the fan blade has rotational potential energy, and the air flow with rotational potential energy will form a vortex. By providing flow guiding serrations on the stationary blades, when the flow guiding serrations come into contact with the vortex, the relatively large vortex is broken up into multiple smaller vortices. When the smaller vortices collide with the stationary blades, they have less rotational potential energy, and the resulting aerodynamic noise is significantly reduced. At the same time, the stationary blades are statically arranged and play the role of intercepting and guiding. When the air flow comes into contact with the flow guiding serrations, some of the air flow is intercepted and guided, while some of the air flow passes through the gaps of the flow guiding serrations and flows to the next stationary blade. Since this part of the air flow has a longer movement space, the position where it collides with the next stationary blade is behind the flow guiding serrations of this stationary blade. The flow guiding serrations can move the collision position of some of the air flow with the stationary blade backward, dispersing the total potential energy of the collisions at the same position, and further reducing the aerodynamic noise of the fan assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a schematic diagram of the overall structure of a fan assembly according to a specific embodiment of the present application;

[0030] Figure 2 is a schematic diagram of the structure of the fan housing from a first perspective according to a specific embodiment of the present application;

[0031] Figure 3 is an exploded schematic diagram of a fan assembly according to a specific embodiment of the present application.

[0032] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Fan housing; 11. Stationary blade; 111. Flow guiding serration; 2. Mounting seat; 21. Connecting tube; 22. Connecting ring; 23. Hollow tube; 3. Motor assembly; 4. Fan blade; 41. Hub; 42. Moving blade; 421. Trailing edge serration. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To facilitate the understanding of the present utility model, the present utility model will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0034] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in this specification in the description of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0035] Embodiment 1

[0036] Please refer to Figure 1 and Figure 2 , Figure 1 , which is a schematic diagram of the overall structure of the fan assembly in this embodiment; Figure 2 , which is a schematic diagram of the structure of the fan housing from the first perspective in this embodiment.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 , which is a schematic diagram of the overall structure of the fan assembly in this embodiment; Figure 2 , which is an exploded view of the fan assembly in this embodiment.

[0038] As shown in Figure 1 and Figure 2 , a fan assembly includes: a fan housing 1, a motor assembly 3, a mounting seat 2, and a fan blade 4. The motor assembly 3 is assembled inside the fan housing 1; the mounting seat 2 is arranged inside the fan housing 1, and the mounting seat 2 is connected to the fan housing 1 through a plurality of static blades 11, and the motor assembly 3 is connected to the mounting seat 2; the fan blade 4 is connected to the motor assembly 3; a flow guiding sawtooth 111 is formed at one end of the plurality of static blades 11 facing the fan blade 4.

[0039] In this embodiment, the fan housing 1 is configured as a cylinder, and a cylindrical air cavity is provided inside. However, the shape of the fan housing 1 is not limited thereto. According to different specific application scenarios, in some embodiments, the shape of the fan housing 1 can be: triangular, quadrilateral, pentagonal, other polygons or other regular shapes, and the external shape structure of the fan housing 1 can be determined according to the needs of specific application scenarios, not limited to specific embodiments.

[0040] One end of the mounting seat 2 is arranged inside the fan housing 1, and the other end of the mounting seat 2 extends outside the fan housing 1. However, the positional relationship between the mounting seat 2 and the fan housing 1 is not limited thereto. According to different specific application scenarios, in some embodiments, the entire mounting seat 2 is arranged inside the fan housing 1. The positional relationship between the mounting seat 2 and the fan housing 1 can be determined according to the needs of specific application scenarios, not limited to specific embodiments.

[0041] In this embodiment, the number of the stationary blades 11 is: 7. However, the number of the stationary blades 11 is not limited thereto. According to different specific application scenarios, the number of the stationary blades 11 can be: 2, 3, 4, 5, 6, 8 or more. The number of the stationary blades 11 can be determined according to the needs of specific application scenarios, and is not limited to specific embodiments.

[0042] In this embodiment, the motor assembly 3 can be (but not limited to): a single-phase motor, a two-phase motor or a three-phase motor. In terms of the motor structure, the motor assembly 3 can be (but not limited to): an inner-rotor motor or an outer-rotor motor.

[0043] In terms of the structure of the fan blade 4, the fan blade 4 can be (but not limited to): an axial-flow fan or a mixed-flow fan. During specific application, the required fan blade 4 can be selected according to the needs of specific application scenarios, which is not limited herein.

[0044] The flow guiding sawteeth 111 are alternately composed of "V"-shaped notches and "V"-shaped tooth marks. In some embodiments, in order to reduce the aerodynamic noise of the flow guiding sawteeth 111, the intersection positions of the "V"-shaped notches are smoothed, and the vertex positions of the "V"-shaped tooth marks are also smoothed.

[0045] In the above embodiment, a plurality of stationary blades 11 are arranged between the fan housing 1 and the mounting seat 2, and a flow guiding sawtooth 111 is formed at one end of each stationary blade 11 facing the fan blade 4. The air flow flowing out from the fan blade 4 has rotational potential energy, and the air flow with rotational potential energy will form a vortex. When the flow guiding sawteeth 111 are arranged on the stationary blades 11 and come into contact with the vortex, the larger-scale vortex is broken up into a plurality of smaller vortices. When the smaller vortices collide with the stationary blades 11, they have less rotational potential energy, and the aerodynamic noise generated by the collision is greatly reduced. At the same time, the stationary blades 11 are statically arranged and play the roles of intercepting and guiding. When the air flow contacts the flow guiding sawteeth 111, some of the air flow is intercepted and guided, while some of the air flow flows through the notches of the flow guiding sawteeth 111 to the next stationary blade 11. Since this part of the air flow has a longer movement space, the position where it collides with the next stationary blade 11 is behind the flow guiding sawteeth 111 of this stationary blade 11. The flow guiding sawteeth 111 can move the collision position of some of the air flow and the stationary blade 11 backward, disperse the total potential energy of the collision contacts at the same position, and further reduce the aerodynamic noise of the fan assembly.

[0046] Please refer to Figure 3 , Figure 3 which is the exploded structural schematic diagram of the fan assembly of this embodiment.

[0047] As shown in Figure 3As shown, in some embodiments, a plurality of moving blades 42 are provided on the fan blade 4, and trailing edge sawteeth 421 are provided at one end of the plurality of moving blades 42 facing the mounting seat 2.

[0048] The fan blade 4 further includes a hub 41, and a plurality of moving blades 42 are arranged around the hub 41.

[0049] The guide sawteeth 111 are provided on the stationary blade 11, while the trailing edge sawteeth 421 are provided on the moving blade 42. Since the air flow has a rotational potential energy during flow, and the rotational direction of this potential energy is the same as the rotational direction of the moving blade 42, therefore, the cutting of the trailing edge sawteeth 421 on the moving blade 42 to the eddy current belongs to co-directional cutting. And the cutting of the guide sawteeth 111 provided on the stationary blade 11 to the eddy current belongs to static interception cutting, with higher cutting efficiency and more obvious eddy current breaking effect.

[0050] In this embodiment, the number of the moving blades 42 is: 9 pieces. However, the number of the moving blades 42 is not limited thereto. According to different specific application scenarios, the number of the moving blades 42 can be: 2 pieces, 3 pieces, 4 pieces, 5 pieces, 6 pieces, 8 pieces or more. The number of the moving blades 42 can be determined according to the needs of specific application scenarios, not limited to specific embodiments.

[0051] The trailing edge sawteeth 421 are alternately composed of "V"-shaped notches and "V"-shaped tooth marks. In some embodiments, in order to reduce the aerodynamic noise of the trailing edge sawteeth 421, the intersection position of the "V"-shaped notches is smoothed, and the vertex position of the "V"-shaped tooth marks is also smoothed.

[0052] When the fan blade 4 rotates, eddy currents will be generated at the trailing edge position of the blade tail. When the trailing edge sawteeth 421 are provided on the moving blade 42 and come into contact with the eddy currents, the larger-scale eddy currents are broken up into multiple smaller eddy currents, and the aerodynamic noise formed by the smaller eddy currents is significantly reduced.

[0053] When the trailing edge sawteeth 421 are provided on the moving blade 42 and the guide sawteeth 111 are provided on the stationary blade 11 at the same time, the guide sawteeth 111 can break up and decompose the outflowing eddy currents, and the guide sawteeth 111 on the stationary blade 11 further decompose the broken-up and decomposed eddy currents. The two processes of breaking up and decomposing miniaturize the eddy currents inside the fan assembly, and reduce the aerodynamic noise of the fan assembly to the greatest extent.

[0054] In some embodiments, each of the plurality of stationary blades 11 extends along the inner surface of the fan housing 1 in a curved manner, and the plurality of moving blades 42 all extend along the surface of the hub 41 of the fan blade 4 in a curved manner, and the bending directions of the plurality of stationary blades 11 are opposite to the rotational direction of the plurality of moving blades 42.

[0055] In this embodiment, the bending direction of the stationary blade 11 being opposite to the rotation direction of the moving blade 42 means that the direction in which the stationary blade 11 bends is opposite to the rotation direction of the moving blade 42, and it is not limited to the specific embodiment where the bending direction of the stationary blade 11 and the rotation direction of the moving blade 42 are 180°. In some embodiments, when the extended line of the bend of the stationary blade 11 forms an obtuse angle with the rotation direction of the moving blade 42, it is also within the scope of the opposite defined in this embodiment.

[0056] The bending direction of the stationary blade 11 is opposite to the rotation direction of the moving blade 42. When the moving blade 42 rotates, it will drive the air flow to rotate in the same direction. At this time, the bending direction of the stationary blade 11 is opposite to the rotation direction of the air flow. When the air flow rotates, it contacts and collides with the bent part of the stationary blade 11. Since the directions are opposite, the included angle when the air flow contacts the bent part of the stationary blade 11 is greater than 90 degrees. The air flow contacts the stationary blade 11 at a larger angle, which can reduce the kinetic energy loss of the air flow when it contacts the stationary blade 11. During the contact process at a larger angle, the guiding effect of the stationary blade 11 on the air flow is obvious, and the energy loss is small, greatly improving the air outlet efficiency.

[0057] In some embodiments, the tooth marks of the flow guiding serrations 111 are inclined. The flow guiding serrations 111 are arranged between the fan housing 1 and the mounting seat 2. Therefore, the tooth marks of the flow guiding serrations 111 can be inclined from the fan housing 1 towards the mounting seat 2, or can be inclined from the mounting seat 2 towards the fan housing 1.

[0058] In some embodiments, the tooth marks of the trailing edge serrations 421 are inclined. The trailing edge serrations 421 are arranged between the fan housing 1 and the mounting seat 2. Therefore, the tooth marks of the trailing edge serrations 421 can be inclined from the fan housing 1 towards the mounting seat 2, or can be inclined from the mounting seat 2 towards the fan housing 1.

[0059] In some embodiments, the tooth marks of the flow guiding serrations 111 are inclined, and the tooth marks of the trailing edge serrations 421 are also inclined.

[0060] In some embodiments, the inclination directions of the tooth marks of the flow guiding serrations 111 and the tooth marks of the trailing edge serrations 421 are the same.

[0061] When the inclination directions of the tooth marks of the flow guiding serrations 111 and the trailing edge serrations 421 are the same, the flow guiding serrations 111 and the trailing edge serrations 421 can secondary break up and decompose the air flow in the same flow direction, making the decomposition effect of the eddy current pointed by the inclination direction more obvious.

[0062] In some embodiments, the inclination directions of the tooth marks of the flow guiding serrations 111 and the tooth marks of the trailing edge serrations 421 are opposite.

[0063] When the inclination directions of the tooth marks of the flow guiding serrations 111 and the trailing edge serrations 421 are opposite, the flow guiding serrations 111 and the trailing edge serrations 421 can respectively break up and decompose the eddy currents pointing in their inclination directions, so that the eddy current areas broken up and decomposed by the flow guiding serrations 111 and the trailing edge serrations 421 are wider.

[0064] In some embodiments, the tooth marks of the flow guiding serrations 111 incline towards the fan housing 1, and the tooth marks of the trailing edge serrations 421 incline towards the fan housing 1.

[0065] The air flow flowing out of the fan blade 4 rotates and flows in a spiral motion from the fan blade 4 towards the fan housing 1. The tooth marks of the flow guiding serrations 111 incline towards the fan housing 1, making the inclination direction of the tooth marks of the flow guiding serrations 111 consistent with the flow direction of the air flow, increasing the contact area between the tooth marks of the flow guiding serrations 111 and the air flow, and making the tooth marks of the flow guiding serrations 111 more efficient in breaking up and decomposing the air flow. Correspondingly, the tooth marks of the trailing edge serrations 421 also incline towards the fan housing 1, also making the inclination direction of the tooth marks of the trailing edge serrations 421 consistent with the flow direction of the air flow, increasing the contact area between the tooth marks of the trailing edge serrations 421 and the air flow, and making the tooth marks of the trailing edge serrations 421 more efficient in breaking up and decomposing the air flow. At the same time, since the inclination directions of both are the same as the air flow direction, the wind resistance of the flow guiding serrations 111 and the trailing edge serrations 421 to the air flow is reduced, and the air outlet efficiency is improved. The tooth marks of the flow guiding serrations 111 and the trailing edge serrations 421 both incline towards the fan housing 1, and can break up and decompose the air flow in the same flow direction for the second time, making the decomposition effect of the eddy current pointing in the inclination direction more obvious.

[0066] In some embodiments, the tooth marks of the flow guiding serrations 111 incline towards the fan housing 1, and the tooth marks of the trailing edge serrations 421 incline towards the mounting seat 2.

[0067] The air flow flowing out of the fan blade 4 rotates and flows in a spiral motion from the fan blade 4 towards the fan housing 1. The tooth marks of the flow guiding serrations 111 incline towards the fan housing 1, making the inclination direction of the tooth marks of the flow guiding serrations 111 consistent with the flow direction of the air flow, increasing the contact area between the tooth marks of the flow guiding serrations 111 and the air flow, and making the tooth marks of the flow guiding serrations 111 more efficient in breaking up and decomposing the air flow. While the tooth marks of the trailing edge serrations 421 incline towards the mounting seat 2, and its inclination direction is opposite to the air flow movement direction. The reversely arranged tooth marks can decompose and break up the laterally moving air flow multiple times, and decompose and break up the eddy current more thoroughly. At the same time, the flow guiding serrations 111 and the trailing edge serrations 421 can respectively break up and decompose the eddy currents pointing in their inclination directions, so that the eddy current areas broken up and decomposed by the flow guiding serrations 111 and the trailing edge serrations 421 are wider.

[0068] In some embodiments, the tooth marks of the flow guiding saw teeth 111 are inclined towards the assembly seat 2, and the tooth marks of the trailing edge saw teeth 421 are inclined towards the fan housing 1. The flow guiding saw teeth 111 and the trailing edge saw teeth 421 can respectively break up and decompose the eddy currents whose directions they point to, so that the areas of the eddy currents broken up and decomposed by the flow guiding saw teeth 111 and the trailing edge saw teeth 421 are wider.

[0069] In some embodiments, the tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 are both inclined towards the assembly seat 2.

[0070] In some embodiments, the tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 correspond to and cooperate with each other.

[0071] In this embodiment, the fact that the tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 correspond to and cooperate with each other means that: at the position where the extension line of the tooth marks of the flow guiding saw teeth 111 intersects with the trailing edge saw teeth 421, there are tooth marks of the trailing edge saw teeth 421; conversely, at the position where the extension line of the tooth marks of the trailing edge saw teeth 421 intersects with the flow guiding saw teeth 111, there are tooth marks of the flow guiding saw teeth 111.

[0072] The tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 correspond to and cooperate with each other, and the tooth marks of the trailing edge saw teeth 421 have the function of dividing the air flow. The divided air flow will re-converge at the flow guiding saw teeth 111, and the converged air flow will be broken up and divided again by the tooth marks of the flow guiding saw teeth 111, avoiding the re-convergence of the eddy currents, and improving the dividing effect on the eddy currents.

[0073] In some embodiments, the tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 are misaligned and cooperate with each other.

[0074] In this embodiment, the fact that the tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 are misaligned and cooperate with each other means that: at the position where the extension line of the tooth marks of the flow guiding saw teeth 111 intersects with the trailing edge saw teeth 421, there are notches of the trailing edge saw teeth 421; conversely, at the position where the extension line of the tooth marks of the trailing edge saw teeth 421 intersects with the flow guiding saw teeth 111, there are notches of the flow guiding saw teeth 111.

[0075] The tooth marks of the flow guiding saw teeth 111 and the tooth marks of the trailing edge saw teeth 421 are misaligned and cooperate with each other. The tooth marks of the trailing edge saw teeth 421 and the tooth marks of the flow guiding saw teeth 111 both have the function of dividing the air flow. They are staggered, which can separate the eddy currents at different positions, increase the dividing area of the eddy currents, and further reduce the aerodynamic noise.

[0076] In some embodiments, the ratio of the length of the stationary blade 11 to the length of the moving blade 42 is 1.1 - 2.8. The length of the stationary blade 11 refers to the length value between one end of the stationary blade 11 where the flow guiding serrations 111 are provided and the opposite end. The length of the moving blade 42 refers to the length value between one end of the moving blade 42 where the trailing edge serrations 421 are provided and the opposite end.

[0077] At the above length ratio, the length of the stationary blade 11 is greater than the length of the moving blade 42. When the fan blade 4 rotates, the moving blade 42 confines the user and guides the air flow. If the distance of the moving blade 42 is too long, the rotational potential energy of the air flow will be too large. The main function of the stationary blade 11 is to cancel and convert the rotational potential energy of the air flow so that it moves horizontally in a fixed direction along the stationary blade 11. If the length of the stationary blade 11 is too short, the rotational potential energy of the air flow flowing out of the fan assembly will be too large, resulting in poor directional movement ability and short directional air supply distance.

[0078] Setting the ratio of the length of the stationary blade 11 to the length of the moving blade 42 between 1.1 - 2.8 can enable the rotational potential energy of the air flow flowing out of the fan blade 4 to be fully cancelled and converted when passing through the moving blade 42, improving the overall air outlet efficiency and directional air supply ability of the fan assembly. At the same time, the air flow is blown out from the fan blade 4 and guided by the stationary blade 11. During this process, due to the setting of the mounting seat 2, the air flow space is compressed, and the air flow is in a process of being pressurized and accelerated. The longer the length of the stationary blade 11, the corresponding path length required for its acceleration, and the air flow acceleration efficiency is improved.

[0079] When the ratio of the two is less than 1.1, the rotational potential energy of the air flow blown out by the fan assembly is too large, the diffusion area of the air flow after being blown out is too large, and the directional air supply ability decreases. When the ratio of the two is greater than 2.8, the energy loss of the fan assembly in the fan housing 1 is too large, and the initial kinetic energy of the air flow at the air outlet position of the fan assembly decreases, also resulting in a decrease in the directional air supply ability of the fan assembly.

[0080] In some embodiments, the ratio of the number of stationary blades 11 to the number of moving blades 42 is 0.5 - 1.

[0081] When the ratio of the number of stationary blades 11 to the number of moving blades 42 is within the numerical range, the air volume and air pressure of the fan assembly can be improved, and the wind speed of the air flow blown out by the fan assembly can be greater. When the ratio of the number of stationary blades 11 to the number of moving blades 42 is less than 0.5, the number of stationary blades 11 is too small, and the cancellation and conversion of the rotational potential energy of the air flow by the stationary blades 11 are not sufficient, reducing the directional air supply ability of the fan assembly. When the ratio of the number of stationary blades 11 to the number of moving blades 42 is greater than 1, the number of stationary blades 11 is too large, increasing the air resistance of the air flow and decreasing the conversion efficiency of the air flow.

[0082] In some embodiments, the assembly base 2 includes: a connecting cylinder 21, a connecting ring 22, and a hollow tube 23. The connecting cylinder 21 is disposed within the fan housing 1. The connecting cylinder 21 is connected to the fan housing 1 through a plurality of stationary blades 11. The connecting ring 22 is disposed within the connecting cylinder 21. The hollow tube 23 is connected to the connecting ring 22. The motor assembly 3 is connected to the hollow tube 23.

[0083] It should be noted that any one of the embodiments in this example can be implemented independently, or can be implemented in combination with one or more other embodiments. When implemented in combination, the combination method should not be limited to the combination methods listed in this example.

[0084] Embodiment 2

[0085] A blowing device includes the fan assembly in Embodiment 1, and the fan assembly serves as the core module assembly for assembling the blowing device.

[0086] It should be pointed out that the blowing devices in this embodiment include (but are not limited to): bladeless fans, table fans, floor fans, spherical fans, neck fans, hand-held fans, industrial fans, air conditioners, hair dryers, etc., products that require boosting air for circulation. The fan assembly in Embodiment 1 is assembled inside the housing of the above products.

[0087] In the blowing device of this embodiment, a plurality of stationary blades 11 are provided between the fan housing 1 and the assembly base 2. At one end of each stationary blade 11 facing the fan blade 4, a flow guiding serration 111 is formed. The air flow flowing out from the fan blade 4 has rotational potential energy, and the air flow with rotational potential energy will form a vortex. When the flow guiding serration 111 is provided on the stationary blade 11 and comes into contact with the vortex, the larger-scale vortex is broken into a plurality of smaller vortices. When the smaller vortices collide with the stationary blade 11, they have less rotational potential energy, and the resulting aerodynamic noise is significantly reduced. At the same time, the stationary blade 11 is statically disposed and functions to intercept and guide. When the air flow comes into contact with the flow guiding serration 111, some of the air flow is intercepted and guided, while some of the air flow passes through the notch of the flow guiding serration 111 and flows to the next stationary blade 11. Since this part of the air flow has a longer movement space, the position where it collides with the next stationary blade 11 is behind the flow guiding serration 111 of this stationary blade 11. The flow guiding serration 111 can move the collision position of part of the air flow with the stationary blade 11 backward, dispersing the total potential energy of the collisions at the same position, and further reducing the aerodynamic noise of the fan assembly.

[0088] It should be noted that the description and drawings of this application provide preferred embodiments of this application. However, this application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Moreover, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the specification of this utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made based on the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application.

Claims

1. A fan assembly, characterized in that: include: Fan housing; An assembly seat, the assembly seat is arranged in the fan housing, and the assembly seat is connected to the fan housing through a plurality of stationary blades; A motor assembly, the motor assembly is assembled in the fan housing, and the motor assembly is connected to the assembly seat; A fan blade connected to the motor assembly; The plurality of stationary blades are formed with guide serrations at one end facing the fan blade.

2. The fan assembly according to claim 1, characterized in that: The fan blades are provided with a plurality of moving blades, and one end of the plurality of moving blades facing the assembly seat is provided with trailing edge serrations.

3. The fan assembly according to claim 2, characterized in that: Each of the plurality of stationary blades is bent and extended along the inner surface of the fan housing, and each of the plurality of moving blades is bent and extended along the hub surface of the fan blades, and the bending direction of the plurality of stationary blades is opposite to the rotation direction of the plurality of moving blades.

4. The fan assembly according to claim 2, characterized in that: The tooth marks of the guide saw teeth are arranged obliquely; and / or, The tooth marks of the trailing edge saw teeth are arranged obliquely.

5. The fan assembly according to claim 4, characterized in that: The tooth marks of the guide saw teeth are in the same inclination direction as the tooth marks of the trailing edge saw teeth; or, The tooth marks of the guide saw teeth are inclined in opposite directions to the tooth marks of the trailing edge saw teeth.

6. The fan assembly according to claim 5, characterized in that: The tooth marks of the guide saw teeth are inclined toward the fan housing, and the tooth marks of the trailing edge saw teeth are inclined toward the fan housing; or, The tooth marks of the guide saw teeth are inclined toward the fan housing, and the tooth marks of the trailing edge saw teeth are inclined toward the assembly seat; or, The tooth marks of the guide serrations are inclined toward the assembly seat, and the tooth marks of the trailing edge serrations are inclined toward the fan housing.

7. The fan assembly according to claim 2, characterized in that: The tooth marks of the guide saw teeth correspond to the tooth marks of the trailing edge saw teeth; or, The tooth marks of the guide saw teeth and the tooth marks of the trailing edge saw teeth are staggered and matched with each other.

8. The fan assembly according to claim 2, characterized in that: The ratio of the length of the stationary blade to the length of the moving blade is 1.1-2.8; and / or, The ratio of the number of the stationary blades to the number of the moving blades is 0.5-1.

9. The fan assembly according to claim 1, characterized in that: The assembly seat includes: a connecting tube, a connecting ring and a hollow tube, the connecting tube is arranged in the fan casing, the connecting tube is connected to the fan casing through the multiple stationary blades, the connecting ring is arranged in the connecting tube, the hollow tube is connected to the connecting ring, and the motor assembly is connected to the hollow tube.

10. A blowing device, characterized in that: The blowing device is assembled with a fan assembly as described in any one of claims 1-9.

Images