Sound-absorbing assembly and range hood

Abstract

The application provides an acoustic absorption assembly applied to an extractor hood, the extractor hood comprising a hood body, comprising: a fixed support comprising a base fixedly connected and a plurality of spaced support cantilevers, the base being used for fixedly connecting with the hood body; a free end of the support cantilevers away from the base being provided with an anti-falling protrusion; an acoustic absorption piece being provided with a plurality of assembly through holes matched with the support cantilevers, the assembly through holes being provided in one-to-one correspondence with the support cantilevers; the free end of the support cantilevers being used for extending into the assembly through hole to abut against an end side of the acoustic absorption piece through the anti-falling protrusion, so as to support and hang the acoustic absorption piece through the support cantilevers and limit the movement of the acoustic absorption piece along the support cantilevers through the anti-falling protrusion; and a radial dimension of the anti-falling protrusion being determined based on stress and deformation analysis of preset parameters of the acoustic absorption piece. The acoustic absorption piece is hung and fixed in the hood body through the support cantilevers, has small space occupation, and has good acoustic absorption and noise reduction effect.

Description

Technical Field

[0001] This application relates to the field of noise reduction technology for range hoods, and in particular to a sound-absorbing component and a range hood. Background Technology

[0002] Sound-absorbing components are widely used in the field of range hoods. They can effectively reduce the noise generated by range hoods and improve the user experience. Because sound-absorbing components are made of flexible materials, they often need to be combined with rigid materials to form sound-absorbing assemblies to ensure their stability and secure fixation.

[0003] In existing technologies, the method of adding a sound-absorbing box to the outside of the sound-absorbing component is often used to encapsulate and fix the flexible sound-absorbing component. However, the external sound-absorbing box occupies a large space and has a low space utilization rate. For a compact range hood, it will compress the volume of the sound-absorbing component and affect the noise reduction effect. Summary of the Invention

[0004] This application provides a sound-absorbing component and a range hood. The sound-absorbing component is suspended and fixed inside the range hood housing by a support cantilever, which occupies little space and has a good sound absorption and noise reduction effect.

[0005] On one hand, this application provides a sound-absorbing component for use in a range hood, the range hood including a housing, comprising:

[0006] The fixed bracket includes a fixedly connected base and a plurality of spaced-apart support arms. The base is used to fix the bracket to the range hood housing. The free ends of the support arms away from the base are provided with anti-detachment protrusions.

[0007] The sound-absorbing component is provided with multiple mounting through holes adapted to the supporting cantilever, and the mounting through holes are provided one-to-one with the supporting cantilever;

[0008] The free end of the support cantilever is used to extend into the assembly through hole until the anti-detachment protrusion abuts against the end side of the sound-absorbing component, so as to suspend and support the sound-absorbing component through the support cantilever and restrict the movement of the sound-absorbing component along the support cantilever through the anti-detachment protrusion; the radial dimension of the anti-detachment protrusion is determined based on the preset parameters of the sound-absorbing component through stress and deformation analysis.

[0009] Furthermore, the support cantilever has a free end and a connecting end connected to the fixed bracket, with the free end positioned above the base at the projection position of the connecting end on the base.

[0010] Furthermore, the sound-absorbing element is a variable-diameter sound-absorbing element, and the radial dimension of the sound-absorbing element increases along the airflow direction;

[0011] The sound-absorbing component has a contact surface that is connected to the base, and the base is contoured to the contact surface.

[0012] Furthermore, the sound-absorbing element is spindle-shaped.

[0013] Furthermore, an oil-guiding slope is provided on the bottom surface of the sound-absorbing component;

[0014] The oil guiding slope has a first end and a second end that are arranged opposite to each other. The first end is located close to the base, and the second end is positioned above the first end at the projection position on the base.

[0015] Furthermore, at least one reinforcing rib structure is provided between the base and the supporting cantilever.

[0016] Furthermore, the preset parameters include the mass of the sound-absorbing component, the effective cross-sectional area of ​​the sound-absorbing component, the width of the sound-absorbing component, the diameter of the mounting through hole, and the tilt angle of the mounting through hole;

[0017] The radial dimension of the anti-detachment protrusion is greater than or equal to the first radial dimension;

[0018] The first radial dimension is calculated based on the radial deformation of the sound-absorbing component at the mounting through hole, the diameter of the mounting through hole, and the inclination angle of the mounting through hole, and is obtained by calculating the critical radial dimension of the anti-detachment protrusion when the sound-absorbing component falls off the anti-detachment protrusion.

[0019] The radial deformation is obtained by analyzing the extrusion deformation of the anti-detachment protrusion and the sound-absorbing component based on the lateral force applied by the anti-detachment protrusion to the sound-absorbing component, the diameter of the assembly through hole, the inclination angle of the assembly through hole, and the width of the sound-absorbing component.

[0020] Furthermore, the lateral force is obtained by performing a force analysis on the sound-absorbing component based on its mass and effective cross-sectional area.

[0021] Furthermore, the radial dimension of the anti-detachment protrusion is less than or equal to the second radial dimension, and the second radial dimension is greater than the first radial dimension;

[0022] The second radial dimension is calculated based on the equivalent deformation radius of the sound-absorbing component at the mounting through hole, the width of the sound-absorbing component, the diameter of the mounting through hole, and the inclination angle of the mounting through hole, and is obtained by considering the critical radial dimension of the anti-detachment protrusion when the sound-absorbing component is mounted on the anti-detachment protrusion.

[0023] The equivalent deformation radius is obtained by performing deformation analysis on the sound-absorbing component based on its width and elastic modulus.

[0024] On the other hand, this application provides a range hood including the sound-absorbing component described in any one of the above claims.

[0025] The sound-absorbing component and range hood provided in this application have the following beneficial effects:

[0026] The sound-absorbing component of this application is applied to a range hood. The range hood includes a range hood housing, comprising: a fixed bracket including a fixedly connected base and multiple spaced-apart support arms; the base is used for fixed connection to the range hood housing; the free end of each support arm away from the base is provided with an anti-detachment protrusion; and a sound-absorbing component having multiple mounting through holes adapted to the support arms, with each mounting through hole corresponding to one of the support arms; the free end of each support arm extends into the mounting through hole to abut against the end side of the anti-detachment protrusion, thereby suspending and supporting the sound-absorbing component through the support arms and restricting the movement of the sound-absorbing component along the support arms through the anti-detachment protrusion; the radial dimension of the anti-detachment protrusion is determined based on the preset parameters of the sound-absorbing component through stress and deformation analysis. The sound-absorbing component of this application is suspended and fixed in the range hood housing by multiple support arms on the fixed bracket, occupying little space, and both large sound-absorbing surfaces of the sound-absorbing component are exposed in the range hood housing, resulting in good sound absorption and noise reduction effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A structural cross-sectional view of a sound-absorbing component provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the structure of a sound-absorbing component provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a fixed bracket provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a range hood provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of a sound-absorbing component provided in an embodiment of this application;

[0033] Figure 6 A schematic diagram of force analysis of a sound-absorbing component provided in an embodiment of this application;

[0034] Figure 7A schematic diagram of deformation analysis of a sound-absorbing component provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of deformation analysis of a sound-absorbing component provided in an embodiment of this application.

[0036] The following is supplementary explanation of the attached figures:

[0037] 10-Fixed bracket; 11-Base; 111-Connecting hole; 12-Support cantilever; 121-Anti-detachment protrusion; 13-Reinforcing rib structure; 20-Sound-absorbing component; 21-Assembly through hole; 22-Oil guide slope; 221-First end; 222-Second end; 100-Smoke hood housing. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0040] The following is in conjunction with the appendix Figure 1-8 The technical solutions described in the embodiments of this application are presented here. The accompanying drawings do not limit the scope of the application as described in the claims.

[0041] This specification provides method operation steps as shown in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operation steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many steps and does not represent the only possible execution order.

[0042] Please see Figure 1-8This application provides a sound-absorbing component for use in a range hood. The range hood includes a range hood housing 100. The sound-absorbing component includes: a fixed bracket 10, including a fixedly connected base 11 and a plurality of spaced-apart support arms 12. The base 11 is fixedly connected to the range hood housing 100. The free end of the support arm 12 away from the base 11 is provided with an anti-detachment protrusion 121. The sound-absorbing component 20 is provided with a plurality of mounting through holes 21 adapted to the support arms 12. The mounting through holes 21 are provided one-to-one with the support arms 12. The free end of the support arm 12 is used to extend into the mounting through hole 21 until the anti-detachment protrusion 121 abuts against the end side of the sound-absorbing component 20, so as to suspend the support sound-absorbing component 20 through the support arm 12 and restrict the movement of the sound-absorbing component 20 along the support arm 12 by the anti-detachment protrusion 121. The radial dimension of the anti-detachment protrusion 121 is determined by stress and deformation analysis based on the preset parameters of the sound-absorbing component 20.

[0043] Furthermore, the base 11 is provided with a plurality of first connection holes 111, and correspondingly, the range hood housing 100 is provided with a plurality of second connection holes adapted to the first connection holes 111, with the first connection holes 111 and the second connection holes being provided in a one-to-one correspondence.

[0044] Furthermore, the sound-absorbing component also includes a plurality of fasteners that are adapted to the first connecting hole 111 and the second connecting hole respectively, and the fasteners, the first connecting hole 111 and the second connecting hole are respectively provided in a one-to-one correspondence.

[0045] Specifically, the fastener can pass through the first connecting hole 111 and be fixedly connected to the second connecting hole, thereby realizing the fixed connection between the base 11 and the range hood housing 100.

[0046] In some specific embodiments, the first connecting hole 111 can be a light hole, the second connecting hole can be a screw hole, the fastener can be a fastening screw, and the fastening screw can be screwed into the screw hole.

[0047] It should be noted that the number of fasteners, the first connecting hole 111 and the second connecting hole depends on the actual situation, and this application does not limit the number of fasteners, the first connecting hole 111 and the second connecting hole.

[0048] In some specific embodiments, the number of fasteners, the first connecting hole 111, and the second connecting hole are all three.

[0049] Furthermore, the fixed bracket 10 includes at least two spaced-apart support cantilever arms 12; preferably, the fixed bracket 10 includes two spaced-apart support cantilever arms 12.

[0050] Furthermore, along the radial direction of the support cantilever 12, the outer circumferential dimension of the anti-detachment protrusion 121 is larger than the outer circumferential dimension of the support cantilever 12; the anti-detachment protrusion 121 abuts against the end side of the sound-absorbing component 20, and the anti-detachment protrusion 121 can restrict the movement of the sound-absorbing component 20 along the support cantilever 12, thus preventing the sound-absorbing component 20 from falling off the support cantilever 12 under the blowing of the airflow.

[0051] The sound-absorbing component of this application is applied to a range hood. The range hood includes a range hood housing, comprising: a fixed bracket including a fixedly connected base and multiple spaced-apart support arms; the base is used for fixed connection to the range hood housing; the free end of each support arm away from the base is provided with an anti-detachment protrusion; and a sound-absorbing component having multiple mounting through holes adapted to the support arms, with each mounting through hole corresponding to one of the support arms; the free end of each support arm extends into the mounting through hole to abut against the end side of the anti-detachment protrusion, thereby suspending and supporting the sound-absorbing component through the support arms and restricting the movement of the sound-absorbing component along the support arms through the anti-detachment protrusion; the radial dimension of the anti-detachment protrusion is determined based on the preset parameters of the sound-absorbing component through stress and deformation analysis. The sound-absorbing component of this application is suspended and fixed in the range hood housing by multiple support arms on the fixed bracket, occupying little space, and both large sound-absorbing surfaces of the sound-absorbing component are exposed in the range hood housing, resulting in good sound absorption and noise reduction effect.

[0052] In this embodiment, the support cantilever 12 has a free end and a connecting end connected to the fixed bracket 10, with the free end projected onto the base 11 above the connecting end projected onto the base 11.

[0053] Please see Figure 1 The free end of the support cantilever 12 is inclined upward relative to the connecting end of the support cantilever 12, so as to prevent the sound-absorbing part 20 from falling downward from the support cantilever 12.

[0054] In this embodiment, the sound-absorbing component 20 is a variable-diameter sound-absorbing component, and the radial dimension of the sound-absorbing component 20 increases along the airflow direction; the sound-absorbing component 20 has an abutment surface connected to the base 11, and the base 11 is contoured to the abutment surface.

[0055] Specifically, during the smoke extraction process of the range hood, the airflow flows upward. Along the direction of airflow, the radial dimension of the sound-absorbing component 20 increases. This reduces the airflow resistance and the blowing force of the airflow on the sound-absorbing component 20, thereby reducing the risk of the sound-absorbing component 20 falling off.

[0056] Furthermore, along the direction of airflow, the radial dimension of the base 11 increases.

[0057] Specifically, the airflow direction can be found in [reference needed]. Figure 1 The direction of the arrow in the image.

[0058] In this embodiment, the sound-absorbing element 20 is spindle-shaped, which can further reduce the airflow resistance and the blowing force of the airflow on the sound-absorbing element 20, thereby further reducing the risk of the sound-absorbing element 20 falling off.

[0059] Furthermore, the base 11 is spindle-shaped.

[0060] In this embodiment of the application, an oil guiding slope 22 is provided on the bottom surface of the sound-absorbing component 20; the oil guiding slope 22 has a first end 221 and a second end 222 that are arranged opposite to each other. The first end 221 is located close to the base 11, and the second end 222 is located above the projection position of the first end 221 on the base 11.

[0061] For details, please see Figure 1 The second end 222 is inclined upward relative to the first end 221, so that the oil stains accumulated on the sound-absorbing component 20 can flow from the second end 222 to the first end 221 along the oil guiding slope 22, and then through the range hood box.

[0062] The oil flows from the wall of the body 100 into the oil cup, preventing the oil stains accumulated on the sound-absorbing part 20 from dripping directly onto places outside the oil cup, such as the stove.

[0063] In this embodiment, at least one reinforcing rib structure 13 is provided between the base 11 and the support cantilever 12, which can improve the structural strength of the fixed bracket 10 and the support strength of the support cantilever 12 for the sound-absorbing component 20.

[0064] Specifically, a reinforcing rib structure 13 is provided between the base 11 and the supporting cantilever 12.

[0065] In this embodiment, the preset parameters include the mass of the sound-absorbing component 20, the effective cross-sectional area of ​​the sound-absorbing component 20, the width of the sound-absorbing component 20, the diameter of the mounting through hole 21, and the tilt angle of the mounting through hole 21; the radial dimension of the anti-detachment protrusion 121 is greater than or equal to the first radial dimension; the first radial dimension is calculated based on the radial deformation of the sound-absorbing component 20 at the mounting through hole 21, the diameter of the mounting through hole 21, and the tilt angle of the mounting through hole 21, to determine the critical radial dimension of the anti-detachment protrusion 121 when the sound-absorbing component 20 detaches from the anti-detachment protrusion 121; wherein, the radial deformation is obtained by analyzing the compression deformation of the anti-detachment protrusion 121 and the sound-absorbing component 20 based on the lateral force applied by the anti-detachment protrusion 121 to the sound-absorbing component 20, the diameter of the mounting through hole 21, the tilt angle of the mounting through hole 21, and the width of the sound-absorbing component 20.

[0066] In this embodiment, the lateral force is obtained by analyzing the force on the sound-absorbing component 20 based on its mass and effective cross-sectional area.

[0067] Specifically, the preset parameters include the mass m of the sound-absorbing component 20 and the effective cross-sectional area A of the sound-absorbing component 20. p The width L of the sound-absorbing component 20, the diameter d1 of the mounting through hole 21, and the tilt angle θ of the mounting through hole 21.

[0068] Among them, the effective cross-sectional area A of the sound-absorbing component 20 p For the maximum cross-sectional area representing the force exerted on the sound-absorbing component 20 in the airflow, please refer to [link / reference]. Figure 5 The AA section in the figure, the cross-sectional area corresponding to the AA section can be the effective cross-sectional area A of the sound-absorbing element 20. p .

[0069] The width L of the sound-absorbing component 20 and the inclination angle θ of the mounting through hole 21 can be found in [reference needed]. Figure 1 .

[0070] Specifically, the radial dimension d2 of the anti-detachment protrusion 121 is greater than or equal to the first radial dimension D1. This makes it easier for the anti-detachment protrusion 121 to limit the sound-absorbing component 20 and prevent the sound-absorbing component 20 from falling off the support cantilever 12 under the airflow if the anti-detachment protrusion 121 is too small.

[0071] Specifically, the first radial dimension D1 can be calculated using the following formula, where ΔX represents the radial deformation of the sound-absorbing component 20 at the assembly through hole 21 due to the compression between the anti-detachment protrusion 121 and the sound-absorbing component 20.

[0072]

[0073] Specifically, the radial deformation ΔX can be calculated using the following formula, where R represents the equivalent deformation radius of the sound-absorbing component 20 at the assembly through hole 21, and δ1 represents the deformation of the sound-absorbing component 20 in the normal direction inside the anti-detachment protrusion 121.

[0074]

[0075] Specifically, R can be calculated using the following formula, where K2 is an empirical parameter, which can be taken as 0.4-0.6 GPa. -1 E represents the elastic modulus of the sound-absorbing component 20, preferably 2-5 GPa.

[0076] R = K2 * L * E

[0077] Specifically, δ1 can be calculated using the following formula, where σ represents the stress of the sound-absorbing component 20.

[0078]

[0079] Specifically, σ can be calculated using the following formula, where F TA represents the lateral force exerted by the anti-detachment protrusion 121 on the sound-absorbing component 20; A represents the critical contact area between the anti-detachment protrusion 121 and the sound-absorbing component 20.

[0080]

[0081] Specifically, F T The sound-absorbing component 20 can be subjected to stress analysis and calculated using the following formula, where F Z The force exerted by the supporting cantilever 12 on the sound-absorbing component 20; F F Characterizes the upward force generated by the airflow blowing on the sound-absorbing component 20; for the force analysis of the sound-absorbing component 20, please refer to [link to relevant documentation]. Figure 6 .

[0082] F F -F Z ·cosθ-mg=0

[0083] F Z sinθ-F T =0

[0084] Specifically, F F The following formula can be used for calculation, where ρ represents the gas density, and ρ can take values ​​from 1.28 to 1.30 kg / m³. 3 V represents the airflow velocity, and V can take values ​​from 0.5 to 5 m / s; C d C represents the drag coefficient of the sound-absorbing component 20. d It can take values ​​between 0.4 and 0.5.

[0085] F F =0.5*ρ*V 2 *C d *A p

[0086] Specifically, A can be calculated using the following formula, where K1 is an empirical parameter, and K1 can be taken as 1.5 to 1.8.

[0087]

[0088] In this embodiment, the radial dimension of the anti-detachment protrusion 121 is less than or equal to the second radial dimension, and the second radial dimension is greater than the first radial dimension. The second radial dimension is calculated based on the equivalent deformation radius of the sound-absorbing component 20 at the assembly through hole 21, the width of the sound-absorbing component 20, the diameter of the assembly through hole 21, and the tilt angle of the assembly through hole 21, to determine the critical radial dimension of the anti-detachment protrusion 121 when the sound-absorbing component 20 is assembled from the anti-detachment protrusion 121. The equivalent deformation radius is obtained by performing deformation analysis on the sound-absorbing component 20 based on the width of the sound-absorbing component 20 and the elastic modulus of the sound-absorbing component 20.

[0089] Specifically, the radial dimension d2 of the anti-detachment protrusion 121 is less than or equal to the second radial dimension D2. This facilitates the assembly of the sound-absorbing component 20 and prevents the anti-detachment protrusion 121 from being too large, which would make the assembly of the sound-absorbing component 20 difficult. Specifically, D2 can be calculated using the following formula.

[0090]

[0091] The following describes specific embodiments of this application based on the above technical solution.

[0092] Example 1

[0093] Please see Figure 1-8 Embodiment 1 provides a sound-absorbing component applied to a range hood. The range hood includes a range hood housing 100. The sound-absorbing component includes: a fixed bracket 10, including a fixedly connected base 11 and a plurality of spaced-apart support arms 12. The base 11 is used to be fixedly connected to the range hood housing 100. The free end of the support arm 12 away from the base 11 is provided with an anti-detachment protrusion 121. The sound-absorbing component 20 is provided with a plurality of mounting through holes 21 adapted to the support arms 12. The mounting through holes 21 are provided one-to-one with the support arms 12. The free end of the support arm 12 is used to extend into the mounting through hole 21 until the anti-detachment protrusion 121 abuts against the end side of the sound-absorbing component 20, so as to suspend the support sound-absorbing component 20 through the support arm 12 and restrict the movement of the sound-absorbing component 20 along the support arm 12 by the anti-detachment protrusion 121. The radial dimension of the anti-detachment protrusion 121 is determined by stress and deformation analysis based on the preset parameters of the sound-absorbing component 20.

[0094] The base 11 is provided with three first connection holes 111, and correspondingly, the range hood housing 100 is provided with three second connection holes that are adapted to the first connection holes 111. The first connection holes 111 and the second connection holes are provided one-to-one.

[0095] The sound-absorbing assembly also includes three fasteners that are adapted to the first connecting hole 111 and the second connecting hole respectively, and the fasteners, the first connecting hole 111 and the second connecting hole are set in a one-to-one correspondence.

[0096] The fastener can pass through the first connecting hole 111 and be fixedly connected to the second connecting hole, thereby realizing the fixed connection between the base 11 and the range hood housing 100.

[0097] The first connecting hole 111 can be a smooth hole, the second connecting hole can be a screw hole, the fastener can be a fastening screw, and the fastening screw can be screwed into the screw hole.

[0098] The fixed bracket 10 includes two spaced-apart support cantilever arms 12.

[0099] Along the radial direction of the support cantilever 12, the outer circumferential dimension of the anti-detachment protrusion 121 is larger than the outer circumferential dimension of the support cantilever 12; the anti-detachment protrusion 121 abuts against the end side of the sound-absorbing component 20, and the anti-detachment protrusion 121 can restrict the movement of the sound-absorbing component 20 along the support cantilever 12.

[0100] The support cantilever 12 has a free end and a connecting end connected to the fixed bracket 10, with the free end positioned above the base 11 at the projection position of the connecting end above the projection position of the base 11.

[0101] The free end of the support cantilever 12 is inclined upward relative to the connecting end of the support cantilever 12.

[0102] The sound-absorbing component 20 is a variable-diameter sound-absorbing component, and the radial dimension of the sound-absorbing component 20 increases along the airflow direction; the sound-absorbing component 20 has an abutment surface connected to the base 11, and the base 11 is contoured to the abutment surface.

[0103] Specifically, during the smoke extraction process of the range hood, the airflow flows upward, and along the direction of airflow, the radial dimension of the sound-absorbing component 20 increases to reduce airflow resistance.

[0104] Along the direction of airflow, the radial dimension of the base 11 increases.

[0105] The sound-absorbing component 20 is spindle-shaped.

[0106] The base 11 is spindle-shaped.

[0107] The bottom surface of the sound-absorbing component 20 is provided with an oil-guiding inclined surface 22; the oil-guiding inclined surface 22 has a first end 221 and a second end 222 that are arranged opposite to each other. The first end 221 is located close to the base 11, and the second end 222 is located above the projection position of the first end 221 on the base 11.

[0108] The second end 222 is tilted upward relative to the first end 221.

[0109] A reinforcing rib structure 13 is provided between the base 11 and the supporting cantilever 12.

[0110] The preset parameters include the mass m of the sound-absorbing component 20 and the effective cross-sectional area A of the sound-absorbing component 20. p The width L of the sound-absorbing component 20, the diameter -1 of the mounting through hole 21, and the inclination angle θ of the mounting through hole 21; the radial dimension d2 of the anti-detachment protrusion 121 is greater than or equal to the first radial dimension D1; the first radial dimension is calculated based on the radial deformation ΔX of the sound-absorbing component 20 at the mounting through hole 21, the diameter d1 of the mounting through hole 21, and the inclination angle θ of the mounting through hole 21, to determine the critical radial dimension of the anti-detachment protrusion 121 when the sound-absorbing component 20 detaches from the anti-detachment protrusion 121; wherein, the radial deformation ΔX is based on the lateral force F applied by the anti-detachment protrusion 121 to the sound-absorbing component 20.T The diameter d1 of the assembly through hole 21, the inclination angle θ of the assembly through hole 21, and the width L of the sound-absorbing component 20 are obtained by analyzing the extrusion deformation of the anti-detachment protrusion 121 and the sound-absorbing component 20.

[0111] Lateral force F T Based on the mass m of the sound-absorbing component 20 and the effective cross-sectional area A of the sound-absorbing component 20 p The results were obtained from stress analysis of the sound-absorbing component 20.

[0112] Among them, the effective cross-sectional area A of the sound-absorbing component 20 p For the maximum cross-sectional area representing the force exerted on the sound-absorbing component 20 in the airflow, please refer to [link / reference]. Figure 5 The AA section in the figure, the cross-sectional area corresponding to the AA section can be the effective cross-sectional area A of the sound-absorbing element 20. p .

[0113] The width L of the sound-absorbing component 20 and the inclination angle θ of the mounting through hole 21 can be found in [reference needed]. Figure 1 .

[0114] When the deformation of the sound-absorbing component 20 satisfies the following formula, it is determined that the sound-absorbing component 20 will detach from the anti-detachment protrusion 121.

[0115]

[0116] Please see below. Figure 8 The radial deformation ΔX can be calculated using the following formula, where R represents the equivalent deformation radius of the sound-absorbing component 20 at the assembly through hole 21, and δ1 represents the deformation of the sound-absorbing component 20 in the normal direction inside the anti-detachment protrusion 121.

[0117]

[0118] For details, please see Figure 8 R can be calculated using the following formula, where K2 is an empirical parameter, which can be taken as 0.4-0.6 GPa. -1 E represents the elastic modulus of the sound-absorbing component 20, preferably 2-5 GPa.

[0119] R = K2 * L * E

[0120] Specifically, δ1 can be calculated using the following formula, where σ represents the stress of the sound-absorbing component 20.

[0121]

[0122] Specifically, σ can be calculated using the following formula, where F T A represents the lateral force exerted by the anti-detachment protrusion 121 on the sound-absorbing component 20; A represents the critical contact area between the anti-detachment protrusion 121 and the sound-absorbing component 20.

[0123]

[0124] Specifically, F T The sound-absorbing component 20 can be subjected to stress analysis and calculated using the following formula, where F z The force exerted by the supporting cantilever 12 on the sound-absorbing component 20; F F Characterizes the upward force generated by the airflow blowing on the sound-absorbing component 20; for the force analysis of the sound-absorbing component 20, please refer to [link to relevant documentation]. Figure 6 .

[0125] F F -F Z ·cosθ-mg=0

[0126] F Z sinθ-F T =0

[0127] Specifically, F F The following formula can be used for calculation, where ρ represents the gas density, and ρ can take values ​​from 1.28 to 1.30 kg / m³. 3 V represents the airflow velocity, and V can take values ​​from 0.5 to 5 m / s; C d C represents the drag coefficient of the sound-absorbing component 20. d It can take values ​​between 0.4 and 0.5.

[0128] F F =0.5*ρ*V 2 *C d *A p

[0129] Specifically, A can be calculated using the following formula, where K1 is an empirical parameter, and K1 can be taken as 1.5 to 1.8.

[0130]

[0131] To prevent the sound-absorbing component 20 from falling off, the diameter of the widest part of the anti-detachment protrusion 121 should meet the following relationship:

[0132]

[0133] The radial dimension d2 of the anti-detachment protrusion 121 is less than or equal to the second radial dimension D2, and the second radial dimension D2 is greater than the first radial dimension D1. The second radial dimension D2 is calculated based on the equivalent deformation radius R of the sound-absorbing part 20 at the assembly through hole 21, the width L of the sound-absorbing part 20, the diameter d1 of the assembly through hole 21, and the inclination angle θ of the assembly through hole 21, to determine the critical radial dimension of the anti-detachment protrusion 121 when the sound-absorbing part 20 is assembled from the anti-detachment protrusion 121. The equivalent deformation radius R is obtained by performing deformation analysis on the sound-absorbing part 20 based on the width L of the sound-absorbing part 20 and the elastic modulus E of the sound-absorbing part 20.

[0134] When the ratio of the deformation δ2 (which has the same characteristic as δ1, used only to distinguish different cases) of the sound-absorbing component 20 in the normal direction inside the anti-detachment protrusion 121 to the width L of the sound-absorbing component 20 exceeds 20%-30%, the sound-absorbing component 20 has been severely deformed, and it is determined that the sound-absorbing component 20 is difficult to install. Therefore, the anti-detachment protrusion 121 needs to be designed to meet the following requirements:

[0135]

[0136] Under this operating condition:

[0137]

[0138]

[0139] Solving for:

[0140]

[0141] When the diameter d2 at the widest point of the anti-detachment protrusion 121 satisfies the following formula, it can ensure that the sound-absorbing component 20 will not fall off and that the sound-absorbing component 20 can be assembled smoothly.

[0142]

[0143] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sound-absorbing component applied to a range hood, the range hood comprising a range hood housing (100), characterized in that, include: The fixed bracket (10) includes a fixedly connected base (11) and a plurality of spaced-apart support arms (12). The base (11) is used to be fixedly connected to the smoke hood housing (100). The free end of the support arm (12) away from the base (11) is provided with an anti-detachment protrusion (121). The sound-absorbing component (20) is provided with a plurality of mounting through holes (21) adapted to the support cantilever (12), and the mounting through holes (21) are provided one-to-one with the support cantilever (12); The free end of the support cantilever (12) is used to extend into the assembly through hole (21) until the anti-detachment protrusion (121) abuts against the end side of the sound-absorbing component (20), so as to suspend and support the sound-absorbing component (20) through the support cantilever (12) and restrict the movement of the sound-absorbing component (20) along the support cantilever (12) through the anti-detachment protrusion (121); the radial dimension of the anti-detachment protrusion (121) is determined based on the preset parameters of the sound-absorbing component (20) through stress and deformation analysis; The support cantilever (12) has a free end and a connecting end connected to the fixed bracket (10) and the free end is positioned above the base (11) at the projection position of the connecting end on the base (11). The sound-absorbing component (20) is a variable-diameter sound-absorbing component, and the radial dimension of the sound-absorbing component (20) increases along the airflow direction; The sound-absorbing component (20) has an abutting surface connected to the base (11), and the base (11) is contoured to the abutting surface; The sound-absorbing component (20) is suspended and fixed inside the range hood housing (100) by multiple support cantilever arms (12) on the fixed bracket, and both sound-absorbing surfaces of the sound-absorbing component (20) are exposed inside the range hood housing (100).

2. The sound-absorbing component according to claim 1, characterized in that, The sound-absorbing element (20) is spindle-shaped.

3. The sound-absorbing component according to claim 1, characterized in that, The bottom surface of the sound-absorbing component (20) is provided with an oil-guiding inclined surface (22); The oil guide slope (22) has a first end (221) and a second end (222) arranged opposite to each other. The first end (221) is arranged close to the base (11), and the second end (222) is positioned above the first end (221) at the projection position of the base (11).

4. The sound-absorbing component according to claim 1, characterized in that, At least one reinforcing rib structure (13) is provided between the base (11) and the supporting cantilever (12).

5. The sound-absorbing component according to any one of claims 1-4, characterized in that, The preset parameters include the mass of the sound-absorbing component (20), the effective cross-sectional area of ​​the sound-absorbing component (20), the width of the sound-absorbing component (20), the diameter of the assembly through hole (21), and the tilt angle of the assembly through hole (21); The radial dimension of the anti-detachment protrusion (121) is greater than or equal to the first radial dimension; The first radial dimension is calculated based on the radial deformation of the sound-absorbing element (20) at the mounting through hole (21), the diameter of the mounting through hole (21), and the tilt angle of the mounting through hole (21), and is obtained by calculating the critical radial dimension of the anti-detachment protrusion (121) when the sound-absorbing element (20) falls off the anti-detachment protrusion (121); The radial deformation is obtained by analyzing the extrusion deformation of the anti-detachment protrusion (121) and the sound-absorbing component (20) based on the lateral force applied by the anti-detachment protrusion (121) to the sound-absorbing component (20), the diameter of the assembly through hole (21), the inclination angle of the assembly through hole (21), and the width of the sound-absorbing component (20).

6. The sound-absorbing component according to claim 5, characterized in that, The lateral force is obtained by analyzing the force on the sound-absorbing component (20) based on its mass and effective cross-sectional area.

7. The sound-absorbing component according to claim 5, characterized in that, The radial dimension of the anti-detachment protrusion (121) is less than or equal to the second radial dimension, and the second radial dimension is greater than the first radial dimension; The second radial dimension is calculated based on the equivalent deformation radius of the sound-absorbing element (20) at the mounting through hole (21), the width of the sound-absorbing element (20), the diameter of the mounting through hole (21), and the inclination angle of the mounting through hole (21), and the critical radial dimension of the anti-detachment protrusion (121) when the sound-absorbing element (20) is assembled from the anti-detachment protrusion (121); The equivalent deformation radius is obtained by performing deformation analysis on the sound-absorbing element (20) based on the width of the sound-absorbing element (20) and the elastic modulus of the sound-absorbing element (20).

8. A range hood, characterized in that, Includes the sound-absorbing component according to any one of claims 1-7.

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