Air outlet structure and bladeless fan lamp

Abstract

The utility model provides a kind of air outlet structure, comprising: shell and lamp shell, shell includes first plate body and first cover body, first plate body is fixedly connected with external installation foundation, first cover body extends downward from the edge arc of first plate body, and first plate body and first cover body are formed around cavity;Lamp shell is set in cavity, including second plate body and second cover body, second plate body is connected with first plate body, and second cover body extends downward from the edge arc of second plate body;Air duct is formed between first cover body and second cover body, and first cover body and second cover body are all provided with recess in the side wall towards air duct, which is hexagonal.In reducing wind speed attenuation, better noise reduction effect is also obtained.The utility model also provides a bladeless fan lamp using the air outlet structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of lighting devices, specifically relating to an air outlet structure and a bladeless fan lamp. Background Technology

[0002] As a traditional lighting fixture, fan lights are popular in the market because they simultaneously meet the needs of indoor ventilation and lighting. With the development of fan lights, bladeless fan lights, which offer better aesthetics and a more integrated look, have gradually become one of the mainstream options.

[0003] Bladeless fan lights integrate the fan unit within the light fixture. When the fan is activated, airflow enters through the top or periphery of the light, is driven by the fan, and then exits through the air duct within the light fixture towards the outlet. However, most current fans are blade-type, producing airflow that changes periodically. This periodic airflow interacts with the light fixture housing, generating wind noise. Furthermore, as the fan speed increases, the magnitude and frequency range of the wind noise also gradually increase, severely impacting the user experience of bladeless fan lights.

[0004] Currently, methods to reduce wind noise typically involve optimizing the air duct and adjusting the fan blade shape. However, due to variations in fan power, speed, size, and usage scenarios, this approach has poor versatility and is costly. A few noise reduction solutions involve placing irregular textures or sound-absorbing materials such as sound-absorbing cotton inside the air duct to reduce noise in certain frequency bands. However, this method has limited sound absorption and reduces airflow speed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an air outlet structure that forms an air duct between a first cover and a second cover, and provides hexagonal grooves on the sidewalls of both covers facing the air duct. This reduces wind speed attenuation and achieves better noise reduction, thus solving the noise problem caused by turbulent pulsation.

[0006] The technical effect to be achieved by this utility model is realized through the following technical solution: In a first aspect, this utility model provides an air outlet structure, comprising: The outer casing includes a first plate and a first cover, the first plate being fixedly connected to an external mounting base, and the first cover extending downwardly in an arc from the edge of the first plate, the first plate and the first cover forming a cavity; and The lamp housing is disposed in the cavity and includes a second plate and a second cover. The second plate is connected to the first plate, and the second cover extends downward in an arc shape from the edge of the second plate. The first cover and the second cover form an air duct, and both the first cover and the second cover have hexagonal grooves in their sidewalls facing the air duct.

[0007] In some implementations, a fan wheel is installed in the air duct, which includes an air inlet and an air outlet. The air inlet is located on the first plate, and the air outlet is located in the air outlet gap between the lower end of the first cover and the lower end of the second cover. From the air inlet to the air outlet, the grooves have the same or different slot inner diameters.

[0008] In some implementations, the groove is a regular hexagon with an inscribed circle having a diameter D, which is the inner diameter of the groove and is ≤6mm.

[0009] In some implementations, the inner diameter of the groove is 2mm, or the inner diameter of the groove is 4mm, or the inner diameter of the groove is 6mm.

[0010] In some implementations, the grooves have the same slotting depth from the air inlet to the air outlet, the grooves are spaced the same from adjacent grooves, and the inner diameter of the grooves gradually increases or decreases.

[0011] In some implementations, the groove includes a first noise reduction groove, a second noise reduction groove, and a third noise reduction groove, wherein the groove depth of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove is 5mm, and the spacing between them is 2mm.

[0012] In some implementations, the inner diameters of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove are 2mm, 4mm, and 6mm, respectively. Alternatively, the inner diameters of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove may be 6mm, 4mm, and 2mm, respectively.

[0013] In some implementations, the first noise reduction slot, the second noise reduction slot, and the third noise reduction slot respectively form a first noise reduction region, a second noise reduction region, and a third noise reduction region arranged in a honeycomb pattern.

[0014] In some implementations, the first cover is provided with air guide fins that extend from the first cover toward the air duct and abut against the second cover.

[0015] Secondly, this utility model provides a bladeless fan light, including a fan assembly, a lamp body, and the aforementioned air outlet structure; The second plate and the second cover form an installation space, and the lamp body is fixed within the installation space; The fan assembly is disposed in the cavity, and the fan assembly includes a motor and a fan wheel, with the fan wheel being drivenly connected to the motor.

[0016] In summary, this utility model has at least the following advantages: 1. The air outlet structure provided by this utility model, when the air duct flows through uneven airflow, the grooves set on the side walls of the first cover and the second cover prevent the airflow in the air duct from having local high speed or local low speed, so that the airflow flows through the air duct more evenly, reduces the energy loss generated during airflow, and thus reduces wind speed attenuation.

[0017] 2. The air outlet structure provided by this utility model has a groove that weakens the turbulent pulsation energy generated by the impeller and reduces the viscous friction resistance and pressure difference resistance of the airflow on the inner wall of the air duct, thereby solving the noise problem caused by the disturbance of the mainstream airflow due to turbulent pulsation; and the hexagonal structure allows the groove to process the generated noise sound waves, further achieving noise reduction in the air duct.

[0018] 3. The bladeless fan light provided by this utility model, after adopting the above-mentioned air outlet structure, effectively reduces the generation of noise without changing the shape of the air duct; at the same time, by adjusting the number, size, and layout of the grooves, the sound absorption effect of a specific frequency band can be achieved with minimal impact on the wind speed, or the noise reduction purpose of sound wave phase difference interference can be achieved by using different groove inner diameters. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the air outlet structure in Example 1.

[0020] Figure 2 for Figure 1 A magnified view of point A in the middle.

[0021] Figure 3 This is a schematic diagram of the groove shape on the side wall of the first and second covers in Embodiment 1.

[0022] Figure 4 This is a simplified schematic diagram of the partial air outlet structure in Example 1.

[0023] Figure 5 for Figure 4 A view along direction B.

[0024] Figure 6 for Figure 2 A schematic diagram of the three noise reduction zones.

[0025] Figure 7 This is a cross-sectional view of the bladeless fan light in Example 2.

[0026] Figure 8This is a bottom-view side view of the outer casing in Example 2.

[0027] Figure 9 This is a cross-sectional view of the bladeless fan light in Example 3.

[0028] Marked in the image: 100. Air outlet structure; 200. Bladeless fan light; 1. Outer shell; 11. First plate; 12. First cover; 121. Air guide fin; 13. Cavity; 14. Connecting column; 15. Structural edging. 2. Lamp housing; 21. Second panel; 22. Second cover; 23. Installation space; 3. Air duct; 31. Air inlet; 32. Air outlet; 4. Groove; 41. Inscribed circle; 42. First noise reduction groove; 43. Second noise reduction groove; 44. Third noise reduction groove; 45. First noise reduction area; 46. Second noise reduction area; 47. Third noise reduction area. 5. Fan assembly, 51. Motor, 511. Connecting structure, 52. Impeller, 521. Fan blade; 6. Lamp body; 7. Hanging bracket; D. The diameter of the inscribed circle. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0033] Example 1: Please see Figures 1-3 This embodiment provides an air outlet structure 100, mainly applied to bladeless fan lights. The air outlet structure 100 includes a housing 1 and a lamp housing 2. Specifically, the housing 1 includes a first plate 11 and a first cover 12. The first plate 11 is fixedly connected to an external mounting base, which is generally a ceiling or a fixed bracket installed on the ceiling, or a side wall, etc. The first cover 12 extends downward in an arc from the edge of the first plate 11, and the first plate 11 and the first cover 12 surround to form a cavity 13. The lamp housing 2 is disposed in the cavity 13 and includes a second plate 21 and a second cover 22. The second plate 21 is connected to the first plate 11 to fix the two together. The second cover 22 extends downward in an arc from the edge of the second plate 21.

[0034] More specifically, an air duct 3 is formed between the first cover 12 and the second cover 22. Airflow flows through the cavity 13 to the air duct 3 and then blows out of the bladeless fan lamp from the air duct 3. Both the first cover 12 and the second cover 22 have hexagonal grooves 4 in their side walls facing the air duct 3.

[0035] Current bladeless fan lights all use impellers 52 with blades 521. During operation, the blades 521, evenly distributed on the impeller 52, generate periodic airflow in local areas of the air duct 3. That is, the blades 521 accelerate the airflow, while the air speed decreases in the gaps between adjacent blades 521. Combined with the shape characteristics of the blades 521, this causes periodic fluctuations in air speed. When the airflow passes through the air duct 3 formed by the arc-shaped first cover 12 and the second cover 22, local high-speed zones or local low-speed zones will form on their sidewalls. Local high-speed zones are prone to turbulence, while local low-speed zones are prone to separation. This increases the energy loss of the uniform-speed main body of the airflow, thus causing the air speed to decrease.

[0036] With grooves 4 provided on the side walls of both the first cover 12 and the second cover 22, a stable air column is generated within the grooves 4 when airflow passes through, suppressing local airflow disturbances and effectively preventing the formation of local high-speed and low-speed zones in the air duct 3. This allows the airflow to pass through the air duct 3 more evenly, reducing airflow energy loss and thus minimizing wind speed attenuation.

[0037] Furthermore, the noise of the bladeless fan light mainly originates from turbulent pulsations. The grooves 4 located on the side walls of the first cover 12 and the second cover 22 weaken the turbulent pulsation energy generated by the fan blades 521, reduce the viscous frictional resistance and pressure difference resistance on the inner wall of the air duct 3, and suppress the noise generated by the turbulent pulsations disturbing the mainstream airflow. The hexagonal grooves 4 can provide space for reflection and scattering of the generated noise waves, and then reduce the noise in the air duct 3 through the principle of phase difference interference cancellation of sound waves, achieving a better noise reduction experience.

[0038] Therefore, the air outlet structure 100 provided in this embodiment can reduce noise while reducing wind speed attenuation, thus providing a better user experience for the bladeless fan light.

[0039] In some embodiments, a fan wheel 52 is installed in the air duct 3. The air duct 3 includes an air inlet 31 and an air outlet 32. The air inlet 31 is disposed on the first plate 11, and the air outlet 32 ​​is an outlet gap disposed between the lower end of the first cover 12 and the lower end of the second cover 22. Driven by the fan wheel 52, air from outside the air duct 3 enters the air duct 3 through the air inlet 31, is processed by the air duct 3, and is blown out through the air outlet 32. Furthermore, from the air inlet 31 to the air outlet 32, the groove 4 has the same or different slot inner diameters. The same slot inner diameter facilitates the processing of noise in a specific frequency band, while different slot inner diameters can achieve a better solution in terms of noise reduction effect and wind speed attenuation.

[0040] In a further embodiment, the groove 4 is a regular hexagon with an inscribed circle 41, the inscribed circle 41 having a diameter D, which is the inner diameter of the groove 4. The size of the inner diameter of the groove will determine the airflow velocity and noise reduction effect within the air duct 3. Please... Figures 1-3 Based on this, refer to Figure 4 . Figure 4 For the simplified local air outlet structure 100, a simulation experiment was conducted to obtain a better solution for the diameter D. The simulation experiment showed that when the diameter D ≤ 6mm, it is possible to achieve both noise reduction and low wind speed loss under the condition of a single slot inner diameter.

[0041] Furthermore, taking diameter D as a variable, the cases of diameter D=2mm (D2), diameter D=4mm (D4), diameter D=6mm (D6), and no groove 4 (original air duct) were analyzed respectively. Figure 4 The simplified model was used to conduct simulation experiments under the same acoustic and fluid excitation conditions, and the simulation results are shown in Table 1.

[0042] Table 1 Simulation results for a single slotted inner diameter

[0043] When the inner diameter of all grooves 4 is 2mm, it exhibits the best noise reduction effect for high-frequency noise in the 15~19kHz range. Based on the "equal loudness theory," it effectively reduces the auditory experience of bladeless fan lights. When the inner diameter of all grooves 4 is 4mm, the wind speed reaches the best in the experimental group, and the noise level also decreases. However, due to the expanded noise reduction frequency band, the auditory experience after noise reduction may not be as good as when the inner diameter of all grooves is 2mm. When the inner diameter of all grooves 4 is 6mm, the average wind speed measured in the air duct 3 is close to the original air duct 3 without grooves 4, but its noise level is lower, and the noise reduction frequency band can cover the mid-low frequency range.

[0044] Furthermore, from the air inlet 31 to the air outlet 32, the grooves 4 have the same slotting depth, and the spacing between the grooves 4 and adjacent grooves 4 is the same. This uniform depth and spacing facilitates the molding and production of the grooves 4, while also ensuring sufficient reflection and scattering of noise within the same frequency band, resulting in better sound wave interference. To meet the noise reduction requirements for different frequency bands, and to accommodate the environmental changes of the impeller 52 under different operating conditions, the inner diameter of the grooves 4 gradually increases or decreases from the air inlet 31 to the air outlet 32. This gradual change in the inner diameter allows for a progressive reduction in turbulence pulsation and noise, resulting in lower wind speed attenuation and better noise reduction compared to a non-gradual design.

[0045] like Figure 5As shown, the groove 4 in this embodiment includes a first noise reduction groove 42, a second noise reduction groove 43, and a third noise reduction groove 44. The groove depth of the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 is 5mm, and the spacing is 2mm. That is, regardless of the size of the inner diameter of the groove, the same groove depth and spacing are used to facilitate the forming of each of the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44. The groove depth of 5mm is sufficient to meet the space required for noise reflection and scattering.

[0046] Furthermore, for ease of description, the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 have different inner diameters and are progressively arranged on the side walls of the first cover 12 and the second cover 22. In some embodiments, the inner diameters of the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 are 2mm, 4mm, and 6mm, respectively. In other embodiments, the inner diameters of the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 are 6mm, 4mm, and 2mm, respectively.

[0047] To further verify the wind speed impact and noise reduction of the two different embodiments, we still used... Figure 4 The simplified structure was used to conduct simulation experiments under the same conditions, thereby obtaining the simulation processing data in Table 2.

[0048] Table 2 shows the simulation results for various slotted inner diameters.

[0049] The progressively multi-grooved inner diameter groove 4 configuration provides better airflow performance than a single-grooved inner diameter groove 4 configuration, and also significantly expands the main noise reduction frequency band. Furthermore, selecting integer values ​​and limiting the groove 4 to dimensions of 2mm or more makes it easier to form and demold during the production stage.

[0050] Of course, in a further embodiment, the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 respectively form a first noise reduction region 45, a second noise reduction region 46, and a third noise reduction region 47 arranged in a honeycomb pattern. Figure 6 As shown, in this embodiment, the first noise reduction area 45, the second noise reduction area 46, and the third noise reduction area 47 are arranged sequentially from the air inlet 31 to the air outlet 32. The honeycomb arrangement further improves the noise reduction effect while reducing the material used in the first cover 12 and the second cover 22, making the outer shell 1 and the lamp housing 2 lighter overall and reducing the load on the external mounting base. Furthermore, the noise reduction areas can be obtained through multiple molding processes, effectively reducing the difficulty and cost of production.

[0051] Obviously, the above solution is only a relatively optimal one. Without limiting cost requirements and production difficulty, in other embodiments, the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 can also be selected from combinations of 5mm, 3mm, and 1mm or 1mm, 3mm, and 5mm, or even more subdivided combinations such as 5.5mm, 2.6mm, and 0.6mm. The required combination of the inner diameters of the first noise reduction groove 42, the second noise reduction groove 43, and the third noise reduction groove 44 can also be obtained through simulation experiments. Since the principle is the same, it will not be elaborated upon here.

[0052] In addition, in this embodiment, the first cover 12 is provided with air guide fins 121, which extend from the first cover 12 toward the air duct 3 and abut against the second cover 22. Please continue reading. Figures 1-4 The wind guide fin 121 allows for different airflow effects and also provides relative contact and fixation between the originally suspended second cover 22 and the first cover 12, effectively reducing vibration noise at the air outlet 32 ​​caused by excessive wind speed. Furthermore, to increase the contact area between airflow and sound waves in the first cover 12 and the second cover 22, the wind guide fin 121 can also be designed as a turbofan structure to achieve more uniform airflow and lower noise. However, it is unavoidable that the greater the obstruction of airflow by the wind guide fin 121, the greater the reduction in wind speed. Therefore, the design of the turbofan-structured wind guide fin 121 needs to be adjusted according to actual requirements, which will not be elaborated here.

[0053] In summary, the air outlet structure provided in this embodiment, when the air duct flows through uneven airflow, the grooves provided on the side walls of the first and second covers prevent the airflow in the air duct from having local high speeds or local low speeds, so that the airflow flows through the air duct more evenly, reducing the energy loss generated during airflow and thus reducing wind speed attenuation.

[0054] Secondly, the air outlet structure provided in this embodiment weakens the turbulent pulsation energy generated by the impeller, reduces the viscous frictional resistance and pressure difference resistance of the airflow on the inner wall of the air duct, thereby reducing the noise problem caused by the disturbance of the mainstream airflow due to turbulent pulsation; and the hexagonal structure allows the groove to process the generated noise sound waves, further achieving noise reduction in the air duct.

[0055] Example 2: Please Figures 1-6 Based on the above, refer to Figures 7-8This embodiment provides a bladeless fan light 200, including a fan assembly 5, a lamp body 6, and the air outlet structure 100 from Embodiment 1. Specifically, the second plate 21 and the second cover 22 surround to form an installation space 23, and the lamp body 6 is fixed within the installation space 23. The fan assembly 5 is disposed in the cavity 13, and the fan assembly 5 includes a motor 51 and a fan wheel 52, with the fan wheel 52 being drivenly connected to the motor 51. The two ends of the shaft of the motor 51 are fixedly connected to the first plate 11 and the second plate 21, respectively, thereby fixing the second plate 21 to the first plate 11.

[0056] After adopting the air outlet structure 100 of Embodiment 1, there is no need to modify the shape and size of the air duct 3. The airflow generated by the impeller 52 can achieve a certain degree of noise reduction while the wind speed attenuates less during the process of passing through the air duct 3. If it is necessary to absorb sound in a specific frequency band or to achieve noise reduction through sound wave phase difference interference, the number, size, and layout of the grooves 4 can be adjusted.

[0057] In some embodiments, such as Figure 8 As shown, the outer shell 1 has a connecting post 14 on the side facing the cavity 13. The lamp body 6 and the lamp housing 2 are fixedly connected to the connecting post 14 together by fasteners and other standard accessories, so as to fix the lamp body 6 and the lamp housing 2 on the outer shell 1 and avoid the lamp housing 2 from being affected by the rotational inertia of the motor 51.

[0058] In summary, the bladeless fan light provided in this embodiment, by adopting the aforementioned air outlet structure, effectively reduces noise generation without altering the shape of the air duct. Furthermore, by adjusting the number, size, and layout of the grooves, sound absorption effects on specific frequency bands can be achieved with minimal impact on wind speed; alternatively, noise reduction through sound wave phase difference interference can be achieved by using different groove inner diameters.

[0059] Example 3: Please Figures 1-8 Based on the above, refer to Figure 9 This embodiment provides a bladeless fan light 200, which is a structural adjustment based on Embodiment 2. The difference is that the bladeless fan light 200 in this embodiment also includes a hanging bracket 7. The outer shell 1 is connected to one end of the hanging bracket 7, and the other end of the hanging bracket 7 is snapped into an external mounting base. In practical applications, the external mounting base snapped into the hanging bracket 7 can be a bracket or a hook plate pre-fixed to the ceiling. Through the snap-fit ​​structure or other means, the bladeless fan light 200 with the hanging bracket 7 can be quickly and stably fixed to the external mounting base, reducing the installation difficulty of the bladeless fan light 200.

[0060] In a further embodiment, the motor 51 has connecting structures 511 at both ends. These connecting structures 511 pass sequentially through the first plate 11 and the hanging bracket 7, and are then fixedly connected together using fasteners such as anti-loosening nuts. At the other end, the motor 51 is also fixedly connected to the lamp housing 2 in the same manner. To facilitate the connection of the lamp body 6 to an external power source and reduce wiring difficulties, the connecting structures 511 at both ends of the motor 51 are internally connected. The lamp body 6's wiring can pass through the middle of the motor 51 and then be electrically connected to external wiring along with the relevant wiring of the motor 51.

[0061] In other embodiments, to avoid vibration noise at the end of the first cover 12 when the impeller 52 is working due to the large surface area of ​​the first cover 12, the outer shell 1 is also provided with a structural edging 15. The structural edging 15 is connected to the end of the first cover 12 and together with the first cover 12 forms an outward folding structure to strengthen the structural strength of the end of the first cover 12 and avoid vibration noise.

[0062] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. An air outlet structure, characterized in that, include: The outer shell includes a first plate and a first cover. The first plate is fixedly connected to an external mounting base, and the first cover extends downward in an arc from the edge of the first plate. The first plate and the first cover surround each other to form a cavity. as well as The lamp housing is disposed in the cavity and includes a second plate and a second cover. The second plate is connected to the first plate, and the second cover extends downward in an arc shape from the edge of the second plate. An air duct is formed between the first cover and the second cover, and both the first cover and the second cover have hexagonal grooves in their sidewalls facing the air duct.

2. The air outlet structure according to claim 1, characterized in that, A fan wheel is installed in the air duct. The air duct includes an air inlet and an air outlet. The air inlet is located on the first plate. The air outlet is located in the air outlet gap between the lower end of the first cover and the lower end of the second cover. From the air inlet to the air outlet, the grooves have the same or different slot inner diameters.

3. The air outlet structure according to claim 2, characterized in that, The groove is a regular hexagon with an inscribed circle. The inscribed circle has a diameter D, which is the inner diameter of the groove, and the diameter D ≤ 6 mm.

4. The air outlet structure according to claim 3, characterized in that, The inner diameter of the groove is 2mm, or the inner diameter of the groove is 4mm, or the inner diameter of the groove is 6mm.

5. The air outlet structure according to claim 3, characterized in that, From the air inlet to the air outlet, the grooves have the same slotting depth, the spacing between the grooves and other adjacent grooves is the same, and the inner diameter of the grooves gradually increases or decreases.

6. The air outlet structure according to claim 5, characterized in that, The groove includes a first noise reduction groove, a second noise reduction groove, and a third noise reduction groove. The groove depth of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove is 5mm, and the spacing between them is 2mm.

7. The air outlet structure according to claim 6, characterized in that, The inner diameters of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove are 2mm, 4mm, and 6mm, respectively. Alternatively, the inner diameters of the first noise reduction groove, the second noise reduction groove, and the third noise reduction groove may be 6mm, 4mm, and 2mm, respectively.

8. The air outlet structure according to claim 7, characterized in that, The first noise reduction groove, the second noise reduction groove, and the third noise reduction groove respectively form a first noise reduction region, a second noise reduction region, and a third noise reduction region arranged in a honeycomb pattern.

9. The air outlet structure according to claim 1, characterized in that, The first cover is provided with air guide fins, which extend from the first cover toward the air duct and abut against the second cover.

10. A bladeless fan light, characterized in that, Includes a fan assembly, a lamp body, and an air outlet structure as described in any one of claims 1-9; The second plate and the second cover form an installation space, and the lamp body is fixed within the installation space; The fan assembly is disposed in the cavity, and the fan assembly includes a motor and a fan wheel, with the fan wheel being drivenly connected to the motor.

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