Air duct mechanism and fan lamp

Abstract

The utility model discloses a kind of air duct mechanisms, including first shell and the second shell being set to the inside of first shell, first shell and the second shell are formed with the air duct of chamber jointly around, first shell and the second shell are respectively equipped with first air guide wall and second air guide wall;Air duct is equipped with noise reduction structure, noise reduction structure is set in first air guide wall and / or second air guide wall;Noise reduction structure includes cavity and noise reduction hole, noise reduction hole has hexagonal structure, cavity is communicated with noise reduction hole and more far away from chamber than noise reduction hole.The air duct mechanism is by setting noise reduction structure on air duct, the noise reduction hole of noise reduction structure can have same or different opening size, cooperate the cavity below, it has obvious sound-absorbing effect to mid-high frequency noise, and it is less to the influence of wind speed.The utility model further provides fan lamp including the air duct mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of bladeless fan lights, specifically relating to a duct mechanism and a fan light. Background Technology

[0002] A bladeless fan light is a fan light in which the impeller is hidden inside a cavity within the main body of the fan light and blows air downwards. Because it uses a centrifugal impeller, a bladeless fan light is also called a centrifugal fan light. Centrifugal impellers rotate at high speeds during operation, which generates some noise.

[0003] In existing bladeless fan light structures, noise reduction from the exhaust air is mainly achieved by optimizing the shape of the air duct and fan blades. Some noise reduction structures use irregular textures or sound-absorbing cotton on the inner wall of the air duct, but the sound absorption band is narrow and cannot absorb high-frequency noise.

[0004] As the rotational speed increases, the high-frequency noise of bladeless fan lights also increases rapidly. According to the "equal loudness theory," the loudness perceived by the human ear is related to the sound pressure level (SPL) and frequency; for example, a 1kHz sound at 40dB sounds equally loud as a 100Hz sound at 60dB (equal loudness). Therefore, reducing high-frequency noise is a key technical problem that current fan light noise reduction structures need to solve when it is necessary to increase the rotational speed of bladeless fan lights. Utility Model Content

[0005] To address the shortcomings of the prior art, this invention provides a duct mechanism that incorporates a noise-reducing structure on the duct. The noise-reducing holes in this structure are hexagonal and can have the same or different opening sizes. These holes, in conjunction with the lower cavity, provide significant sound absorption for mid-to-high frequency noise while having minimal impact on wind speed. This invention also provides a fan light incorporating this duct mechanism.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects: In a first aspect, the present invention provides an air duct mechanism, including a first housing and a second housing disposed inside the first housing, the first housing and the second housing together forming an air duct with a cavity, the first housing and the second housing respectively being provided with a first air guide wall and a second air guide wall; The air duct is equipped with a noise reduction structure, which is disposed in the first air guide wall and / or the second air guide wall; The noise reduction structure includes a cavity and a noise reduction hole. The noise reduction hole has a hexagonal structure. The cavity is connected to the noise reduction hole and is farther away from the cavity than the noise reduction hole.

[0007] In some embodiments, the air duct is further provided with an air inlet and an air outlet. The air inlet is disposed in the first housing, and the air outlet is an air outlet gap disposed between the lower end of the first housing and the lower end of the second housing. From the air inlet to the air outlet, the chamber gradually narrows, and the noise reduction holes have the same or different opening inner diameters.

[0008] In some embodiments, both the first and second air guide walls are provided with noise reduction structures. The noise reduction hole is a regular hexagon with an inscribed circle, and the inner diameter of the opening of the noise reduction hole is the diameter L of the inscribed circle, where the diameter L ≤ 6 mm.

[0009] In some embodiments, the noise reduction holes have the same opening depth from the air inlet to the air outlet, and the noise reduction holes are spaced at the same distance from other adjacent noise reduction holes. The inner diameter of the noise reduction hole gradually increases, or the inner diameter of the noise reduction hole gradually decreases, or the inner diameter of the noise reduction hole is the same.

[0010] In some embodiments, the noise reduction aperture includes a first micro-hole, a second micro-hole, and a third micro-hole, wherein the inner diameters of the first micro-hole, the second micro-hole, and the third micro-hole are 2 mm, 4 mm, and 6 mm, respectively, the opening depths of the first micro-hole, the second micro-hole, and the third micro-hole are all 5 mm, and the spacing between them is 2 mm.

[0011] In some embodiments, the first air guide wall includes a first air guide portion and a second air guide portion, wherein the first air guide portion is curved and protrudes toward the cavity, and the second air guide portion is curved and moves away from the cavity.

[0012] In some embodiments, the first micropore, the second micropore, and the third micropore respectively form a first noise reduction region, a second noise reduction region, and a third noise reduction region arranged in a honeycomb pattern; in the first air guide wall, the first noise reduction region is located in the first air guide section, and the second noise reduction region and the third noise reduction region are both located in the second air guide section.

[0013] In some embodiments, the second air guide wall includes a third air guide portion and a fourth air guide portion, the third air guide portion being curved and away from the chamber, and the second air guide portion being curved and convex towards the chamber; the first noise reduction area and the second noise reduction area are located in the third air guide portion, and the third noise reduction area is located in the third air guide portion.

[0014] In some embodiments, the cavity extends along the first air guide wall and / or the second air guide wall and has the same cavity depth; The cavity is equipped with sound-absorbing cotton.

[0015] Secondly, this utility model provides a fan light, including a motor, a fan wheel, and a lighting module, as well as the aforementioned air duct mechanism. The fan wheel is disposed in the cavity, and the motor is driven and connected to the fan wheel. The lighting module is disposed in the light-emitting cavity of the second housing.

[0016] In summary, this utility model has at least the following advantages: 1. The air duct mechanism provided by this utility model has a noise reduction structure on the first air guide wall and / or the second air guide wall that make up the air duct. The noise reduction holes of the noise reduction structure are hexagonal and can have the same or different opening sizes. The noise reduction holes and the cavity have a significant sound absorption effect on mid-to-high frequency (3.5K-20kKHz) noise and have little impact on wind speed.

[0017] 2. The air duct mechanism provided by this utility model optimizes the arrangement structure of the noise reduction holes. Specifically, from the air inlet to the air outlet, the inner diameter of the noise reduction holes gradually increases, forming three noise reduction areas arranged in a honeycomb pattern. This can separate the incident sound wave into traveling waves and scattered waves, and induce interference cancellation through phase difference, covering noise from low frequency to high frequency ranges, especially enhancing the attenuation effect of the mid-low frequency range that the human ear is sensitive to.

[0018] 3. The fan light provided by this utility model adopts a duct mechanism with a noise reduction structure, arranges noise reduction holes in different areas, and can further set sound-absorbing cotton in the cavity to enhance the sound absorption effect while avoiding reducing the wind speed. Attached Figure Description

[0019] Figure 1 This is a top view of the fan light where the air duct mechanism of Example 1 is located.

[0020] Figure 2 for Figure 1 Cross-sectional view along line AA.

[0021] Figure 3 for Figure 2 Enlarged diagram of part B.

[0022] Figure 4 This is a simplified structural diagram of the air duct mechanism in Example 1.

[0023] Figure 5 for Figure 4 Cross-sectional view along line CC.

[0024] Figure 6 This is a side view of a simplified model of the air duct mechanism in Example 1.

[0025] Figure 7 for Figure 6 An enlarged schematic diagram of part D in the middle.

[0026] Figure 8 A schematic diagram of a simplified model of the duct mechanism used in the simulation of Example 2.

[0027] Figure 9 The transmission loss curves for different processing groups in Example 2 are shown in the simulation.

[0028] Figure 10 This is a cross-sectional view of the fan light of Embodiment 3 of this utility model.

[0029] Marked in the image: 100 - Air duct mechanism; 1-First housing, 11-First air guide wall; 111 - First air guide section, 112 - Second air guide section; 2-Second housing, 21-Second air guide wall; 211 - Third air guide section, 212 - Fourth air guide section; 3-Air duct, 30-Cavity, 31-Air inlet, 32-Air outlet; 4-Noise reduction structure, 41-Noise reduction hole, 42-Cavity; 411 - First micropore, 412 - Second micropore, 413 - Third micropore; 401 - First noise reduction area, 402 - Second noise reduction area, 403 - Third noise reduction area; 200 - Motor, 300 - Wind turbine, 400 - Lighting module; L - the diameter of the inscribed circle. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1 refer to Figures 1-5 This embodiment provides a duct mechanism 100, including a first housing 1 and a second housing 2. The first housing 1 is fixedly connected to an external foundation, such as a suspended ceiling, ceiling, or wall. The second housing 2 is disposed inside the first housing 1 and is used to install a lighting device. The second housing 2 and the first housing 1 together form a duct 3, which has a chamber 30. The first housing 1 and the second housing 2 are respectively provided with a first air guide wall 11 and a second air guide wall 21. Specifically, the chamber 30 of the duct 3 is formed by the first air guide wall 11 and the second air guide wall 21, and a fan is installed in the chamber 30. When the fan rotates at high speed, airflow disturbances generate noise. To reduce noise, the duct 3 is provided with a noise reduction structure 4, which is disposed in the first air guide wall 11 and / or the second air guide wall 21.

[0035] The noise reduction structure 4 includes a noise reduction hole 41 and a cavity 42. The noise reduction hole 41 has a hexagonal structure and has the same or different opening sizes. The cavity 42 is interconnected with the noise reduction hole 41, and the cavity 42 is farther away from the chamber 30 than the noise reduction hole 41.

[0036] In some embodiments, the noise reduction structure 4 is only disposed in the first air guide wall 11, and not in the second air guide wall 21; in some embodiments, the noise reduction structure 4 is only disposed in the second air guide wall 21, and not in the first air guide wall 11; in some embodiments, both the first air guide wall 11 and the second air guide wall 21 are provided with the noise reduction structure 4. In this embodiment, the first air guide wall 11 and the second air guide wall 21 are arranged opposite to each other, and both the first air guide wall 11 and the second air guide wall 21 are provided with the noise reduction structure 4. The noise reduction hole 41 of the noise reduction structure 4 has a hexagonal structure and works in conjunction with the cavity 42, which has a significant sound absorption effect on mid-to-high frequency (3.5K-20kKHz) noise, and has little impact on wind speed. The air duct 3 is also provided with an air inlet 31 and an air outlet 32. The air outlet 31 is located in the first housing 1, and the air outlet 32 ​​is located at the air outlet gap between the lower end of the first housing 1 and the lower end of the second housing 2. When the impeller rotates, the airflow enters the chamber 30 from the upper air inlet 31, and is then driven and compressed by the impeller. After passing through the air duct and being processed by the noise reduction structure 4, the airflow flows out from the lower air outlet 32.

[0037] Combination Figures 3-7 From the air inlet 31 to the air outlet 32, the chamber 30 gradually narrows. The noise reduction hole 41 is a regular hexagon with an inscribed circle, and the inner diameter of the opening of the noise reduction hole 41 is the diameter L of the inscribed circle, with diameter L ≤ 6mm. These noise reduction holes 41 have the same opening depth, and the spacing between the noise reduction holes 41 and other adjacent noise reduction holes is the same.

[0038] In some embodiments, the inner diameter of the noise reduction hole 41 gradually increases from the air inlet 31 to the air outlet 32. That is, from the air inlet 31 to the air outlet 32 ​​along the direction of the air duct 3, the distance between the first air guide wall 11 and the second air guide wall 21 gradually decreases, causing the chamber 30 to gradually narrow until the air outlet 32 ​​with a slit structure. At the same time, the inner diameter of the noise reduction hole 41 of the noise reduction structure 4 gradually increases, that is, the inner diameter of the noise reduction hole 41 near the air outlet 32 ​​is larger than the inner diameter of the noise reduction hole 41 near the air inlet 31. For example, the inner diameters of the noise reduction holes are set to 2mm, 4mm and 6mm respectively.

[0039] In some embodiments, the inner diameter of the noise reduction hole 41 gradually decreases from the air inlet 31 to the air outlet 32, for example, the inner diameter of the noise reduction hole is set to 6mm, 4mm and 2mm respectively; in other embodiments, the inner diameter of the noise reduction hole 41 is the same from the air inlet 31 to the air outlet 32, for example, the inner diameter of the noise reduction hole is set to 2mm, or 4mm or 6mm.

[0040] like Figure 4As shown, for ease of simulation, this embodiment simplifies the air duct 3 by cutting it, forming a simplified air duct mechanism model 301. The air duct 3 has noise reduction structures 4 on both the first guide wall 11 and the second guide wall 12. Specifically, the noise reduction holes 41 include a first micro-hole 411, a second micro-hole 412, and a third micro-hole 413. In a preferred embodiment, the inner diameters (diameter of the inscribed circle) of the first micro-hole 411, the second micro-hole 412, and the third micro-hole 413 are 2mm, 4mm, and 6mm, respectively. The opening depths of the first micro-hole 411, the second micro-hole 412, and the third micro-hole 413 are all 5mm, and the spacing between them is 2mm; that is, the spacing between two adjacent first micro-holes 411, the spacing between two adjacent second micro-holes 412, and the spacing between two adjacent third micro-holes 413 are all 2mm.

[0041] Furthermore, the first micropore 411, the second micropore 412, and the third micropore 413 respectively form a honeycomb-shaped arrangement of a first noise reduction region 401, a second noise reduction region 402, and a third noise reduction region 403. Based on the above honeycomb arrangement, the noise reduction hole structure composed of the first micropore 411, the second micropore 412, and the third micropore 413 can decompose the incident sound wave into a traveling wave and a heat dissipation wave, inducing interference cancellation through phase difference. The cavity 42 works in conjunction with the noise reduction hole 41 for noise reduction. The cavity 42 can be regarded as a Helmholtz resonator. When the frequency of the incident sound wave approaches its resonant frequency, the air column in the cavity vibrates violently, converting sound energy into heat energy through viscous dissipation. In this way, based on the scattering of low-frequency sound waves by the noise reduction hole 41 and the absorption of mid-frequency sound waves by the cavity 42, noise in the low-to-high frequency range is covered, especially enhancing the attenuation effect in the mid-to-low frequency range that the human ear is sensitive to.

[0042] Reference Figures 3-5 The first air guide wall 11 includes a first air guide section 111 and a second air guide section 112, both of which have an arc-shaped curved surface structure. Specifically, the arc-shaped bend of the first air guide section 111 protrudes towards the chamber 30, while the arc-shaped bend of the second air guide section 112 is away from the chamber 30. Preferably, in the first air guide wall 11, the first noise reduction region 401, composed of first micropores 411, is located in the first air guide section 111, and the second noise reduction region 402, composed of second micropores 412, and the third noise reduction region 403, composed of third micropores 413, are both located in the second air guide section 112.

[0043] The second air guide wall 21 includes a third air guide section 211 and a fourth air guide section 212, both of which have an arc-shaped curved surface structure. Specifically, the arc-shaped bend of the third air guide section 211 is away from the chamber 30, while the arc-shaped bend of the fourth air guide section 212 protrudes towards the chamber 30. Preferably, in the second air guide wall 21, the first noise reduction region 401 and the second noise reduction region 402 are located in the third air guide section 211, and the third noise reduction region 403 is located in the third air guide section 212.

[0044] It should be noted that in this embodiment, the cavity 42 extends along the first air guide wall 11 and the second air guide wall 21, having the same cavity depth. That is, the cavity 42 is interconnected with the noise reduction hole 41, and extends in an arc shape along the first air guide wall 11 and the second air guide wall 21 respectively. The distance between the bottom of the cavity and the bottom of the noise reduction hole is the cavity depth, and the depth of each cavity is equal. Preferably, the depth of the cavity 42 is 3mm.

[0045] Since the noise reduction hole 41 is interconnected with the cavity 42, a portion of the airflow from the chamber 30 will enter the cavity 42 through the noise reduction hole 41 and then exit from the noise reduction hole, resulting in a loss of wind speed. Therefore, in some embodiments, sound-absorbing materials such as sound-absorbing cotton can be placed in the cavity 42 to further enhance the sound absorption effect while avoiding weakening the wind speed.

[0046] The air duct mechanism provided in this embodiment has a noise reduction structure on the first and / or second air guide walls that make up the air duct, and the arrangement of the noise reduction holes is optimized: from the air inlet to the air outlet, the inner diameter of the noise reduction holes can be set to gradually increase, forming three noise reduction areas arranged in a honeycomb pattern. This can separate the incident sound wave into a traveling wave and a scattered wave, and induce interference cancellation through phase difference, covering noise in the low to high frequency range, especially enhancing the attenuation effect in the mid-low frequency range that the human ear is sensitive to. The noise reduction holes of the noise reduction structure have the same or different opening sizes, and in conjunction with the cavity, they have a significant sound absorption effect on mid-high frequency (3.5K-20kKHz) noise, and have little impact on wind speed.

[0047] Example 2 exist Figures 1-7 Based on, refer to Figure 8 Based on a simplified model of the air duct structure, this embodiment simulates different noise reduction structures in the air duct. The specific processing groups are as follows: Original air duct: No noise reduction structure was installed; D2: The inner diameter of the noise reduction hole is 2mm; D4: The inner diameter of the noise reduction hole is 4mm; D6: The inner diameter of the noise reduction hole is 6mm; D2D4D6: The inner diameter of the noise reduction holes is distributed in 2mm, 4mm and 6mm; D6D4D2: The inner diameter of the noise reduction holes is distributed in 6mm, 4mm and 2mm.

[0048] The noise reduction holes are 5mm deep, with a spacing of 2mm between adjacent holes. A 3mm deep cavity is provided below each noise reduction hole. The noise reduction holes have a regular hexagonal structure, and their inner diameter is the diameter L of the inscribed circle.

[0049] The simplified model of the duct mechanism of the above treatment group was given the same acoustic and fluid excitation, and the simulation results are shown in Table 1.

[0050] Table 1 Simulation results of simplified models of the air duct mechanism at different treatment locations

[0051] Combining the simulation results in Table 1 and Figure 8 The transmission loss curves show that the simplified model of the air duct with noise reduction holes and the air duct with separate noise reduction zones has little impact on wind speed, while the outlet noise is low and the sound absorption band is wide. Among them, the D2D4D6 processing group has the lowest outlet noise, and the D6D4D2 processing group covers the widest sound absorption band.

[0052] Example 3 exist Figures 1-8 Based on, refer to Figure 9 This embodiment provides a fan light, including a motor 200, a fan wheel 300, and a lighting module 400, as well as the air duct mechanism 100 of Embodiment 1. The fan wheel 300 is installed in the chamber 30 of the air duct 3, and the motor 200 is driven by the fan wheel 300. The lighting module 400 is installed in the light-emitting chamber 22 of the second housing 2.

[0053] The fan light provided in this embodiment adopts a duct mechanism with a noise reduction structure, arranges noise reduction holes in different areas, and can further install sound-absorbing cotton in the cavity to enhance the sound absorption effect while avoiding reducing the wind speed.

[0054] 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. A duct system, characterized in that, It includes a first housing and a second housing disposed inside the first housing. The first housing and the second housing together form an air duct with a cavity. The first housing and the second housing are respectively provided with a first air guide wall and a second air guide wall. The air duct is equipped with a noise reduction structure, which is disposed in the first air guide wall and / or the second air guide wall; The noise reduction structure includes a cavity and a noise reduction hole. The noise reduction hole has a hexagonal structure. The cavity is connected to the noise reduction hole and is farther away from the cavity than the noise reduction hole.

2. The air duct mechanism according to claim 1, characterized in that, The air duct is also provided with an air inlet and an air outlet. The air inlet is located in the first housing, and the air outlet is located in the air outlet gap between the lower end of the first housing and the lower end of the second housing. From the air inlet to the air outlet, the chamber gradually narrows, and the noise reduction holes have the same or different opening inner diameters.

3. The air duct mechanism according to claim 2, characterized in that, Both the first and second air guide walls are equipped with noise reduction structures. The noise reduction hole is a regular hexagon with an inscribed circle. The inner diameter of the opening of the noise reduction hole is the diameter L of the inscribed circle, and the diameter L ≤ 6 mm.

4. The air duct mechanism according to claim 3, characterized in that, From the air inlet to the air outlet, the noise reduction holes have the same opening depth, and the distance between the noise reduction holes and other adjacent noise reduction holes is the same. The inner diameter of the noise reduction hole gradually increases, or the inner diameter of the noise reduction hole gradually decreases, or the inner diameter of the noise reduction hole is the same.

5. The air duct mechanism according to claim 3, characterized in that, The noise reduction aperture includes a first micro-hole, a second micro-hole, and a third micro-hole. The inner diameters of the first micro-hole, the second micro-hole, and the third micro-hole are 2mm, 4mm, and 6mm, respectively. The opening depths of the first micro-hole, the second micro-hole, and the third micro-hole are all 5mm, and the spacing between them is 2mm.

6. The air duct mechanism according to claim 5, characterized in that, The first air guide wall includes a first air guide section and a second air guide section. The first air guide section is curved and protrudes towards the cavity, while the second air guide section is curved and moves away from the cavity.

7. The air duct mechanism according to claim 6, characterized in that, The first micropore, the second micropore, and the third micropore respectively form a first noise reduction region, a second noise reduction region, and a third noise reduction region arranged in a honeycomb pattern; in the first air guide wall, the first noise reduction region is located in the first air guide section, and the second noise reduction region and the third noise reduction region are both located in the second air guide section.

8. The air duct mechanism according to claim 7, characterized in that, The second air guide wall includes a third air guide section and a fourth air guide section. The third air guide section is curved and away from the chamber, while the second air guide section is curved and protrudes towards the chamber. The first noise reduction area and the second noise reduction area are located in the third air guide section, and the third noise reduction area is located in the third air guide section.

9. The air duct mechanism according to any one of claims 1-8, wherein the cavity extends along the first air guide wall and / or the second air guide wall and has the same cavity depth; The cavity is equipped with sound-absorbing cotton.

10. A fan light, characterized in that, It includes a motor, a fan wheel, and a lighting module, as well as the air duct mechanism according to any one of claims 1-9, wherein the fan wheel is disposed in the chamber, and the motor is driven and connected to the fan wheel; the lighting module is disposed in the light-emitting chamber disposed in the second housing.

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