Sound absorption assembly, air inlet device and air inlet device control method

Abstract

The invention provides a sound absorption assembly, an air inlet device and an air inlet device control method, and relates to the technical field of kitchen appliances. The shell is provided with an opening, and the elastic layer covers the opening, so that the interior of the shell and the elastic layer form a sound absorption cavity; when the elastic layer deforms, the volume of the sound absorption cavity can be driven to change, so that the noise of the air inlet device is reduced. In the process that the sound absorption assembly moves towards the draught fan assembly, the elastic layer continuously gets close to the bottom of the draught fan assembly, then the elastic layer is extruded, the size of the sound absorption cavity is reduced, the sound absorption frequency of the sound absorption cavity is increased, and the sound absorption effect of the sound absorption cavity on medium-high frequency noise is good. At the moment, in the process that the sound absorption assembly is driven to move away from the fan assembly, the elastic layer gradually recovers to the original shape, the size of the sound absorption cavity is increased, the sound absorption frequency of the sound absorption cavity is reduced, the sound absorption effect of the sound absorption cavity on low and medium frequency noise is good, and therefore the sound absorption assembly achieves noise reduction of a large-range frequency band.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a sound absorption component, an air inlet device and a control method for the air inlet device. Background Art

[0002] With the improvement of the demand for kitchen air quality, the range hood, as an important ventilation device, has been widely used, and its noise problem has attracted more and more attention.

[0003] In a range hood, a non-closed flow channel structure is adopted. When the fan starts, a negative pressure suction is generated, and the smoke is collected by the smoke collecting cavity and sent into the fan. After being accelerated by the fan, the smoke is discharged. Under the user's working condition environment, the noise value radiated through the smoke collecting cavity is the highest; from the working noise spectrum, the proportion of medium and low frequency noise within 1000 Hz is the largest. The medium and low frequency noise has a long sound wavelength and is easy to pass through the noise reduction structure, having a greater impact on the surrounding environment.

[0004] The existing noise reduction structure adopts the form of combining a perforated plate and a sound absorption material. It has a good noise reduction effect on high frequency noise, but has a poor noise reduction effect on medium and low frequency noise with a long sound wave, resulting in poor noise reduction effect of the noise reduction structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a sound absorption component to solve the technical problem that the existing noise reduction structure has a poor noise reduction effect on medium and low frequency noise.

[0006] The sound absorption component provided by the present invention includes a housing and an elastic layer;

[0007] The housing is provided with an opening, and the elastic layer covers the opening so that an acoustic cavity is formed between the inside of the housing and the elastic layer;

[0008] When the elastic layer deforms, it can drive the volume of the acoustic cavity to change, so as to reduce the noise of the air inlet device.

[0009] Further, the sound absorption component further includes a sound absorption layer;

[0010] The opening is arranged at the top of the housing, and a plurality of sound absorption holes are arranged at the bottom of the housing. The sound absorption layer is connected to the inner surface of the housing and covers the plurality of sound absorption holes.

[0011] Further, the housing includes a first bottom wall and a second bottom wall which are symmetrically arranged;

[0012] The first bottom wall and the second bottom wall are inclined, and a plurality of sound absorption holes are respectively arranged on the first bottom wall and the second bottom wall. The inner surfaces of the first bottom wall and the second bottom wall are respectively connected with the sound absorption layer.

[0013] Further, the elastic layer is made of an elastic rubber material.

[0014] Another object of the present invention is to provide an air inlet device, comprising a fan assembly, a drive assembly and the sound absorption assembly provided by the present invention;

[0015] The fan assembly is disposed above the elastic layer;

[0016] The drive assembly is connected to the sound absorption assembly, and the drive assembly can drive the sound absorption assembly to move towards or away from the fan assembly; when the sound absorption assembly moves towards the fan assembly, the fan assembly can contact the elastic layer and drive the elastic layer to deform.

[0017] Furthermore, the air inlet device further comprises a main housing;

[0018] The sound absorption assembly, the fan assembly and the drive assembly are all disposed within the main housing; the sound absorption assembly is slidably connected to the main housing through a slide rail assembly.

[0019] Furthermore, the slide rail assembly and the drive assembly are respectively disposed on both sides of the sound absorption assembly;

[0020] One side of the housing is slidably connected to the main housing through the slide rail assembly, and the other side of the housing is connected to the main housing through the drive assembly.

[0021] Furthermore, the slide rail assembly comprises a slide rail and a slider;

[0022] The slide rail is fixed on the inner surface of the main housing, the slider is connected to the housing, and the slider is slidably connected to the slide rail.

[0023] Furthermore, the air inlet device further comprises a control assembly, and the drive assembly and the fan assembly are respectively connected to the control assembly.

[0024] Another object of the present invention is to provide a control method for an air inlet device, for controlling the air inlet device provided by the present invention, comprising the following steps:

[0025] Obtain the current actual working condition of the air inlet device, determine the spectral curve corresponding to the actual working condition, and match the absorption coefficient curve with the best sound absorption effect for the spectral curve;

[0026] Determine the moving distance of the sound absorption assembly according to the absorption coefficient curve with the best sound absorption effect.

[0027] Furthermore, determining the spectral curve corresponding to the actual working condition comprises the following steps:

[0028] Establish multiple standard working conditions of the air inlet device according to multiple power ranges of the air inlet device;

[0029] Establish spectral curves corresponding to multiple standard working conditions;

[0030] Select the corresponding standard working condition according to the actual working condition, and determine the corresponding spectral curve according to the selected standard working condition.

[0031] Further, the steps for matching the absorption coefficient curve with the optimal sound absorption effect for the frequency spectrum curve include the following:

[0032] Establish the absorption coefficient curves of the absorption components corresponding to multiple working conditions of the volume of the absorption cavity; establish a combined model of the frequency spectrum curve and the absorption coefficient curve, and the combined model can match the absorption coefficient curve with the optimal sound absorption effect for any frequency spectrum curve;

[0033] Input the selected frequency spectrum curve into the combined model to determine the absorption coefficient curve with the optimal sound absorption effect.

[0034] Further, it also includes the following steps: drive the absorption component to move according to the moving distance of the absorption component.

[0035] The absorption component provided by the present invention includes a housing and an elastic layer; the housing is provided with an opening, and the elastic layer covers the opening so that an absorption cavity is formed between the inside of the housing and the elastic layer; when the elastic layer deforms, it can drive the volume of the absorption cavity to change, so as to reduce the noise of the air inlet device. During use, the absorption component is used to be arranged below the fan component, the elastic layer is arranged on the top of the housing, and the absorption component can move towards or away from the fan component to adjust the distance between the fan component and the absorption component. The elastic layer can deform. When the absorption component moves towards the fan component, the elastic layer continuously approaches the bottom of the fan component until the elastic layer contacts the bottom of the fan component, and then the elastic layer is squeezed, the volume of the absorption cavity shrinks, the absorption frequency of the absorption cavity rises, and the absorption cavity has a good absorption effect on medium and high frequency noises; at this time, when driving the absorption component to move away from the fan component, the elastic layer gradually returns to its original state, the volume of the absorption cavity increases, the absorption frequency of the absorption cavity drops, and the absorption cavity has a good absorption effect on medium and low frequency noises, so that the absorption component can achieve noise reduction in a large range of frequency bands, and the noise reduction effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 is a schematic structural diagram of a Helmholtz resonator;

[0038] Figure 2 is a schematic structural diagram of the undeformed absorption component provided by the embodiment of the present invention;

[0039] Figure 3 is a schematic structural diagram of the deformed absorption component provided by the embodiment of the present invention;

[0040] Figure 4 is a perspective view of the sound absorption component provided by an embodiment of the present invention;

[0041] Figure 5 is a schematic structural view of the air inlet device provided by an embodiment of the present invention;

[0042] Figure 6 is a front view of the air inlet device provided by an embodiment of the present invention when the sound absorption component is deformed;

[0043] Figure 7 is a front view of the air inlet device provided by an embodiment of the present invention when the sound absorption component is not deformed;

[0044] Figure 8 is a schematic structural view of the driving component of the air inlet device provided by an embodiment of the present invention;

[0045] Figure 9 is a schematic diagram of the sound absorption coefficient curve of the sound absorption component corresponding to the volume conditions of multiple sound absorption cavities provided by an embodiment of the present invention;

[0046] Figure 10 is a schematic diagram of the frequency spectrum curve of the air inlet device corresponding to multiple standard conditions provided by an embodiment of the present invention;

[0047] Figure 11 is a flowchart of the air inlet device control method provided by an embodiment of the present invention.

[0048] Icons: 1 - Helmholtz resonator; 2 - sound absorption component; 21 - housing; 22 - elastic layer; 23 - first bottom wall; 24 - second bottom wall; 25 - sound absorption hole; 26 - sound absorption layer; 27 - third bottom wall; 3 - fan assembly; 4 - main machine housing; 5 - driving component; 51 - motor; 52 - screw; 53 - screw guide rail; 6 - slide rail assembly; 61 - slide rail; 62 - sliding member. Detailed Embodiments

[0049] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] The present invention provides a sound absorption component, an air inlet device, and an air inlet device control method. Multiple embodiments are given below to describe the sound absorption component provided by the present invention in detail.

[0051] The sound absorption component 2 provided in this embodiment, as Figures 1 to 8As shown, it includes a housing 21 and an elastic layer 22; the housing 21 is provided with an opening, and the elastic layer 22 covers the opening so that an acoustic absorption cavity is formed between the inside of the housing 21 and the elastic layer 22; when the elastic layer 22 deforms, it can drive the volume of the acoustic absorption cavity to change, so as to reduce the noise of the air intake device.

[0052] In use, the acoustic absorption component 2 is used to be arranged below the fan component 3, the elastic layer 22 is arranged on the top of the housing 21, and the acoustic absorption component 2 can move towards or away from the fan component 3 to realize the adjustment of the distance between the fan component 3 and the acoustic absorption component 2. The elastic layer 22 can deform. When the acoustic absorption component 2 moves towards the fan component 3, the elastic layer 22 continuously approaches the bottom of the fan component 3 until the elastic layer 22 contacts the bottom of the fan component 3. Subsequently, the elastic layer 22 is squeezed, the volume of the acoustic absorption cavity shrinks, the acoustic absorption frequency of the acoustic absorption cavity rises, and the acoustic absorption cavity has a good acoustic absorption effect on medium and high frequency noises; at this time, when driving the acoustic absorption component 2 to move away from the fan component 3, the elastic layer 22 gradually returns to its original state, the volume of the acoustic absorption cavity increases, the acoustic absorption frequency of the acoustic absorption cavity decreases, and the acoustic absorption cavity has a good acoustic absorption effect on medium and low frequency noises, so that the acoustic absorption component 2 can achieve noise reduction in a wide range of frequency bands and has a good noise reduction effect.

[0053] The noise elimination performance of the Helmholtz resonator 1 is affected by the volume V of the resonance cavity, the neck length lc and the cross-sectional area Dc. In this embodiment, the neck length lc and the cross-sectional area Dc are fixed and unchanged, and the volume V changes. The larger the volume of the resonance cavity, the lower the resonance absorption frequency moves towards the low frequency. The smaller the volume of the resonance cavity, the higher the resonance absorption frequency moves towards the high frequency.

[0054] Furthermore, the acoustic absorption component 2 further includes an acoustic absorption layer 26; the opening is arranged at the top of the housing 21, and a plurality of acoustic absorption holes 25 are arranged at the bottom of the housing 21. The acoustic absorption layer 26 is connected to the inner surface of the housing 21, and the acoustic absorption layer 26 covers a plurality of acoustic absorption holes 25.

[0055] A plurality of acoustic absorption holes 25 are arranged at the bottom of the housing 21, and the plurality of acoustic absorption holes 25 form an acoustic absorption hole area. The acoustic absorption layer 26 is fixedly connected to the inner surface of the housing 21 so that the acoustic absorption layer 26 covers the acoustic absorption hole area formed by the plurality of acoustic absorption holes 25 to realize the acoustic absorption of high frequency noises.

[0056] The opening is arranged at the top of the housing 21, and a plurality of acoustic absorption holes 25 are arranged at the bottom of the housing 21, so that the plurality of acoustic absorption holes 25 avoid the opening to prevent the acoustic absorption holes 25 from interfering with the opening.

[0057] If the fan component 3 is single-sided air intake, a plurality of acoustic absorption holes 25 can be opened only on one side of the housing 21, so that the plurality of acoustic absorption holes 25 are located below the air intake of the fan component 3. If the fan component 3 is double-sided air intake, a plurality of acoustic absorption holes 25 can be opened on both sides of the housing 21 respectively, so that a plurality of acoustic absorption holes 25 are arranged below both air intakes.

[0058] Further, the housing 21 includes a first bottom wall 23 and a second bottom wall 24 which are symmetrically arranged; the first bottom wall 23 and the second bottom wall 24 are inclined, and the first bottom wall 23 and the second bottom wall 24 are respectively provided with a plurality of sound absorption holes 25, and the inner surfaces of the first bottom wall 23 and the second bottom wall 24 are respectively connected with a sound absorption layer 26.

[0059] Specifically, the first bottom wall 23 and the second bottom wall 24 are connected by a third bottom wall 27, the third bottom wall 27 is horizontally arranged, the first bottom wall 23 and the third bottom wall 27 are inclined, the second bottom wall 24 and the third bottom wall 27 are inclined, and the first bottom wall 23 and the second bottom wall 24 are symmetrically arranged on both sides of the third bottom wall 27.

[0060] The first bottom wall 23 is provided with a plurality of sound absorption holes 25, the inner surface of the first bottom wall 23 is fixedly connected with a sound absorption layer 26, the first bottom wall 23 is arranged below one air inlet of the fan, the second bottom wall 24 is provided with a plurality of sound absorption holes 25, the inner surface of the second bottom wall 24 is fixedly connected with a sound absorption layer 26, and the second bottom wall 24 is arranged below the other air inlet of the fan.

[0061] Further, the elastic layer 22 is made of an elastic rubber material.

[0062] The elastic rubber material has good stretching and tensile properties and good anti - rupture properties, which can endow the elastic layer 22 with good deformation properties and anti - rupture properties.

[0063] In this embodiment, the elastic layer 22 is inclined with respect to the horizontal plane, one end of the elastic layer 22 is higher than the other end, the elastic layer 22 covers the opening, and one end edge of the opening is higher than the other end edge. Such a setting can enable the elastic layer 22 to fully fit with the fan assembly 3 after contacting the fan assembly 3, and fully compress the volume of the sound absorption cavity.

[0064] The air inlet device provided in this embodiment includes a fan assembly 3, a driving assembly 5, and the sound absorption assembly 2 provided in this embodiment; the fan assembly 3 is arranged above the elastic layer 22; the driving assembly 5 is connected with the sound absorption assembly 2, and the driving assembly 5 can drive the sound absorption assembly 2 to move towards or away from the fan assembly 3; when the sound absorption assembly 2 moves towards the fan assembly 3, the fan assembly 3 can contact the elastic layer 22 and drive the elastic layer 22 to deform.

[0065] The sound absorption component 2 is used to be arranged below the fan component 3. The elastic layer 22 is arranged on the top of the housing 21. The sound absorption component 2 can move towards or away from the fan component 3 under the drive of the drive component 5, so as to realize the adjustment of the distance between the fan component 3 and the sound absorption component 2. The elastic layer 22 can deform. When the sound absorption component 2 moves towards the fan component 3, the elastic layer 22 continuously approaches the bottom of the fan component 3 until the elastic layer 22 contacts the bottom of the fan component 3. Subsequently, the elastic layer 22 is squeezed, the volume of the sound absorption cavity shrinks, the sound absorption frequency of the sound absorption cavity rises, and the sound absorption effect of the sound absorption cavity on medium and high frequency noises is better. At this time, when driving the sound absorption component 2 to move away from the fan component 3, the elastic layer 22 gradually returns to its original state, the volume of the sound absorption cavity increases, the sound absorption frequency of the sound absorption cavity decreases, and the sound absorption effect of the sound absorption cavity on medium and low frequency noises is better, so that the attracting component can achieve noise reduction in a wide range of frequency bands and has a good noise reduction effect.

[0066] The drive component 5 can be an electric push rod, or a cylinder or a hydraulic cylinder, etc.

[0067] Furthermore, the air inlet device further includes a main machine housing 4. The sound absorption component 2, the fan component 3 and the drive component 5 are all arranged in the main machine housing 4. The sound absorption component 2 is slidably connected to the main machine housing 4 through a slide rail component 6.

[0068] The sound absorption component 2, the fan component 3 and the drive component 5 are all arranged in the main machine housing 4, and the main machine housing 4 plays a protective role for the sound absorption component 2, the fan component 3 and the drive component 5.

[0069] One end of the drive component 5 is fixedly connected to the inner surface of the main machine housing 4, and the other end of the drive component 5 is fixedly connected to the housing 21. When the drive component 5 expands and contracts, it drives the housing 21 to rise and fall, thereby driving the sound absorption component 2 to move towards or away from the fan component 3.

[0070] The sound absorption component 2 is slidably connected to the inner surface of the main machine housing 4 through the slide rail component 6. When the drive component 5 drives the sound absorption component 2 to rise and fall, the sound absorption component 2 slides relative to the main machine housing 4 through the slide rail component 6, and the slide rail component 6 plays a guiding role for the sound absorption component 2.

[0071] For the air inlet device provided in this embodiment, the sound absorption component 2 can absorb the reverberation noise transmitted to the bottom of the main machine housing 4 and reduce the noise radiated by the main machine housing 4 along the air inlet flow path.

[0072] Furthermore, the slide rail component 6 and the drive component 5 are respectively arranged on both sides of the sound absorption component 2. One side of the housing 21 is slidably connected to the main machine housing 4 through the slide rail component 6, and the other side of the housing 21 is connected to the main machine housing 4 through the drive component 5.

[0073] Specifically, one end of the driving component 5 is fixedly connected to the inner surface of the host housing 4, and the other end of the driving component 5 is fixedly connected to the other side of the housing 21. The driving component 5 can drive the housing 21 to move up and down. The other side of the housing 21 is slidably connected to the inner surface of the host housing 4 through a slide rail assembly 6, and the slide rail assembly 6 can play a guiding role in the up and down movement of the housing 21.

[0074] The slide rail assembly 6 and the driving component 5 are respectively arranged on both sides of the sound absorption component 2, preventing the slide rail assembly 6 and the driving component 5 from interfering with each other, and the structure is relatively simple, facilitating the arrangement of the slide rail assembly 6 and the driving component 5.

[0075] The driving component 5 may include a motor 51, a screw 52, and a lead screw guide 53. The output shaft of the motor 51 is connected to the screw 52. The motor 51 drives the screw 52 to rotate around the axis of the screw 52. The motor 51 is fixed on the inner surface of the host housing 4. The lead screw guide 53 is sleeved on the screw 52, and the lead screw guide 53 is threadedly connected to the screw 52. The lead screw guide 53 is fixedly connected to the other side of the housing 21.

[0076] Furthermore, the slide rail assembly 6 includes a slide rail 61 and a sliding member 62. The slide rail 61 is fixed on the inner surface of the host housing 4. The sliding member 62 is connected to the housing 21, and the sliding member 62 is slidably connected to the slide rail 61.

[0077] The slide rail 61 is fixed on the inner surface of the host housing 4. The sliding member 62 is connected to the other side of the housing 21. The sliding member 62 is slidably connected to the slide rail 61, and the sliding member 62 can slide along the extension direction of the slide rail 61.

[0078] The sliding member 62 can be a wheel. The wheel is rotatably connected to the other side of the housing 21. The cooperation between the wheel and the slide rail 61 has a small frictional force and the sliding is relatively smooth.

[0079] In addition, the sliding member 62 can also be a slider. The slider is fixedly connected to the other side of the housing 21, and the slider is slidably connected to the slide rail 61 in cooperation.

[0080] Furthermore, the air inlet device further includes a control component, and the driving component 5 and the fan component 3 are respectively connected to the control component.

[0081] The control component is connected to the fan component 3. The control component can obtain the power and air flow of the fan component 3 to obtain the current actual working condition of the user.

[0082] The control component is connected to the driving component 5. The control component can control the driving component 5 to drive the sound absorption component 2 to move an appropriate distance, so that the sound absorption cavity moves to an appropriate position and the volume of the sound absorption cavity changes to an appropriate volume, making the sound absorption effect of the sound absorption component 2 better.

[0083] The air inlet device control method provided in this embodiment is asFigures 9 to 11 As shown, the steps for controlling the air intake device provided in this embodiment include the following:

[0084] Obtain the current actual working condition of the air intake device, determine the spectral curve corresponding to the actual working condition, and match the absorption coefficient curve with the optimal absorption effect for the spectral curve;

[0085] Determine the moving distance of the sound absorption component 2 according to the absorption coefficient curve with the optimal absorption effect.

[0086] For example, determine that the spectral curve of the air intake device corresponding to the actual working condition is T1. Use a detector to detect that the noise value of the air intake device at this time is B. Query the noise frequency f1 corresponding to the noise value B through the spectral curve T1; query one or more absorption coefficient curves corresponding to the noise frequency f1. Taking multiple absorption coefficient curves as an example, compare the absorption coefficients of the multiple absorption coefficient curves at the noise frequency f1, and select the absorption coefficient curve with the highest absorption coefficient, so that the absorption coefficient of the sound absorption component 2 is the largest and the sound absorption ability of the sound absorption component 2 is the best. The volume of the sound absorption cavity can be determined through the selected absorption coefficient curve, and then the moving distance of the sound absorption component 2 can be determined. By driving the sound absorption component 2 to move the distance determined by the above method, the sound absorption component 2 can be moved to the position with the optimal absorption effect.

[0087] During the use of the air intake device, the control component can receive the current actual working condition of the user in real time. When the current actual working condition of the user changes, the control component selects the distance that the sound absorption component 2 needs to move according to the above control method, so that the sound absorption component 2 can change the volume of the sound absorption cavity in real time according to the actual working condition, making the sound absorption component 2 adapt to the continuously changing noise frequency and improving the noise reduction effect.

[0088] Further, determining the spectral curve corresponding to the actual working condition includes the following steps:

[0089] Establish multiple standard working conditions of the air intake device according to multiple power intervals of the air intake device;

[0090] Establish spectral curves corresponding to multiple standard working conditions;

[0091] Select the corresponding standard working condition according to the actual working condition, and determine the corresponding spectral curve according to the selected standard working condition.

[0092] Specifically, according to multiple power ranges of the air intake device, multiple standard operating conditions of the air intake device are established. For example, if the air intake device is set with n power ranges, which are respectively (P1 - △P, P1 + △P), (P2 - △P, P2 + △P), (P3 - △P, P3 + △P),......(Pn - △P, Pn + △P), where n ≥ 1 and P is power. Then the power range of the P1 standard operating condition is (P1 - △P, P1 + △P), the power range of the P2 standard operating condition is (P2 - △P, P2 + △P), and the power range of the Pn standard operating condition is (Pn - △P, Pn + △P).

[0093] Spectrum curves of the air intake device corresponding to multiple standard operating conditions are established; the spectrum curve of the P1 standard operating condition is T1, the spectrum curve of the P2 standard operating condition is T2, the spectrum curve of the P3 standard operating condition is T3, and the spectrum curve of the Pn standard operating condition is Tn. In the laboratory environment, spectrum curves of multiple standard operating conditions are collected, and the corresponding relationship between the spectrum curve and the standard operating condition is established, Ti = f(Pi); i ≥ 1;

[0094] The current actual operating condition of the user is obtained, and the corresponding standard operating condition is selected according to the actual operating condition; the power of the fan assembly 3 and the noise value of the air intake device under the current actual operating condition of the user are obtained; it is judged which power range of the standard operating condition the current actual power of the fan assembly 3 falls into according to the power of the fan assembly 3 under the current actual operating condition of the user. For example, if the current actual power of the fan assembly 3 falls into the power range of the P2 standard operating condition, then the P2 standard operating condition is selected;

[0095] The corresponding spectrum curve is determined according to the selected standard operating condition; specifically, the corresponding spectrum curve T2 is determined according to the P2 standard operating condition.

[0096] Furthermore, matching the spectrum curve with the absorption coefficient curve with the optimal sound absorption effect includes the following steps:

[0097] Absorption coefficient curves of the absorption component 2 corresponding to multiple sound absorption cavity volume operating conditions are established; a combined model of the spectrum curve and the absorption coefficient curve is established, and the combined model can match the absorption coefficient curve with the optimal sound absorption effect for any spectrum curve;

[0098] The selected spectrum curve is input into the combined model to determine the absorption coefficient curve with the optimal sound absorption effect.

[0099] Absorption coefficient curves of the absorption component 2 corresponding to multiple sound absorption cavity volume operating conditions are established; absorption coefficient curves corresponding to different sound absorption cavity volumes, Vb; b ≥ 1;

[0100] Establish a combined model of the frequency spectrum curve and the sound absorption coefficient curve. The combined model can match the sound absorption coefficient curve with the optimal sound absorption effect for any frequency spectrum curve. For example, when the frequency spectrum curve is T1, and the noise value of the air inlet device is detected by the detector as B at this time, the noise frequency corresponding to the noise value B is queried through the frequency spectrum curve T1. Input the noise frequency f1 into the combined model. The combined model can query one or more sound absorption coefficient curves corresponding to the noise frequency f1. Taking multiple sound absorption coefficient curves as an example, the combined model can compare the sound absorption coefficients of multiple sound absorption coefficient curves at the noise frequency f1. The combined model selects the sound absorption coefficient curve with the highest sound absorption coefficient, so that the sound absorption coefficient of the sound absorption component 2 is the largest and the sound absorption ability of the sound absorption component 2 is the best. The volume of the sound absorption cavity can be determined through the selected sound absorption coefficient curve, and then the moving distance of the sound absorption component 2 can be determined. By driving the sound absorption component 2 to move the distance determined by the above method, the sound absorption component 2 can be moved to the position with the optimal sound absorption effect;

[0101] Further, it further includes the following steps: Drive the sound absorption component 2 to move according to the moving distance of the sound absorption component 2.

[0102] Drive the sound absorption component 2 to move a selected distance. After the sound absorption component 2 is moved to the selected position, the detection component can be used to record the moving distance of the sound absorption component 2 to infer the current position, so as to calculate with the current position as the initial point for the next movement.

[0103] The air inlet device control method provided by this embodiment can be carried out according to the following steps:

[0104] According to multiple power intervals of the air inlet device, establish multiple standard working conditions of the air inlet device. For example, the air inlet device is set with n power intervals, which are respectively (P1 - △P, P1 + △P), (P2 - △P, P2 + △P), (P3 - △P, P3 + △P),......(Pn - △P, Pn + △P), where n ≥ 1 and P is the power. Then the power interval of the P1 standard working condition is (P1 - △P, P1 + △P), the power interval of the P2 standard working condition is (P2 - △P, P2 + △P), and the power interval of the Pn standard working condition is (Pn - △P, Pn + △P)

[0105] Establish the frequency spectrum curves of the air inlet device corresponding to multiple standard working conditions; The frequency spectrum curve of the P1 standard working condition is T1, the frequency spectrum curve of the P2 standard working condition is T2, the frequency spectrum curve of the P3 standard working condition is T3, and the frequency spectrum curve of the Pn standard working condition is Tn. In the laboratory environment, collect the frequency spectrum curves of multiple standard working conditions and establish the corresponding relationship between the frequency spectrum curve and the standard working condition, Ti = f(Pi); i ≥ 1;

[0106] Establish the sound absorption coefficient curves of the sound absorption component 2 corresponding to multiple sound absorption cavity volume working conditions; Establish the sound absorption coefficient curves corresponding to different sound absorption cavity volumes, Vb; b ≥ 1;

[0107] Establish a combined model of the spectrum curve and the sound absorption coefficient curve. The combined model can match the sound absorption coefficient curve with the optimal sound absorption effect for any spectrum curve. For example, when the spectrum curve is T1, the noise value of the air inlet device is detected by the detector to be B at this time. The noise frequency corresponding to the noise value B is queried through the spectrum curve T1. The noise frequency f1 is input into the combined model. The combined model can query one or more sound absorption coefficient curves corresponding to the noise frequency f1. Taking multiple sound absorption coefficient curves as an example, the combined model can compare the sound absorption coefficients of multiple sound absorption coefficient curves at the noise frequency f1. The combined model selects the sound absorption coefficient curve with the highest sound absorption coefficient, so that the sound absorption coefficient of the sound absorption component 2 is the largest and the sound absorption ability of the sound absorption component 2 is the best. The volume of the sound absorption cavity can be determined through the selected sound absorption coefficient curve, and then the moving distance of the sound absorption component 2 can be determined. By driving the sound absorption component 2 to move the distance determined by the above method, the sound absorption component 2 can be moved to the position with the optimal sound absorption effect.

[0108] After establishing the combined model, obtain the user's current actual working condition and select the corresponding standard working condition according to the actual working condition; obtain the power of the fan component 3 and the noise value of the air inlet device under the user's current actual working condition; judge which power interval of the standard working condition the current actual power of the fan component 3 falls into according to the power of the fan component 3 under the user's current actual working condition. For example, if the current actual power of the fan component 3 falls into the power interval of the P2 standard working condition, then select the P2 standard working condition.

[0109] Determine the corresponding spectrum curve according to the selected standard working condition; specifically, determine the corresponding spectrum curve T2 according to the P2 standard working condition.

[0110] Input the selected spectrum curve into the combined model to determine the sound absorption coefficient curve with the optimal sound absorption effect; determine the moving distance of the sound absorption component 2 from the selected sound absorption coefficient curve; drive the sound absorption component 2 to move according to the moving distance of the sound absorption component 2. Specifically, input the spectrum curve T2 into the combined model. The actual noise value of the air inlet device is detected by the detector to be h2 at this time. The noise frequency corresponding to the noise value h2 is queried through the spectrum curve T2. The noise frequency f2 is input into the combined model. The combined model can query one or more sound absorption coefficient curves corresponding to the noise frequency f2. Taking multiple sound absorption coefficient curves as an example, the combined model can compare the sound absorption coefficients of multiple sound absorption coefficient curves at the noise frequency f2. The combined model selects the sound absorption coefficient curve with the highest sound absorption coefficient, so that the sound absorption coefficient of the sound absorption component 2 is the largest and the sound absorption ability of the sound absorption component 2 is the best. The volume of the sound absorption cavity can be determined through the selected sound absorption coefficient curve, and then the moving distance of the sound absorption component 2 from the initial position can be determined. By driving the sound absorption component 2 to move the distance determined by the above method through the driving component 5, the sound absorption component 2 can be moved to the position with the optimal sound absorption effect.

[0111] Drive the sound absorption component 2 to move a selected distance. After the sound absorption component 2 moves to the selected position, the detection component can be used to record the moving distance of the sound absorption component 2 to estimate the current position, so as to calculate with the current position as the initial point for the next movement.

[0112] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound absorbing component, characterized in that: It comprises a shell (21) and an elastic layer (22); The shell (21) is provided with an opening, and the elastic layer (22) covers the opening, so that the interior of the shell (21) and the elastic layer (22) form a sound absorbing cavity; When the elastic layer (22) is deformed, the volume of the sound absorbing cavity can be driven to change, thereby reducing the noise of the air intake device.

2. The sound absorbing assembly according to claim 1, characterized in that: The sound absorbing component (2) further comprises a sound absorbing layer (26); The opening is arranged at the top of the shell (21), a plurality of sound absorbing holes (25) are arranged at the bottom of the shell (21), the sound absorbing layer (26) is connected to the inner surface of the shell (21), and the sound absorbing layer (26) covers the plurality of sound absorbing holes (25).

3. The sound absorbing assembly according to claim 2, characterized in that: The housing (21) comprises a first bottom wall (23) and a second bottom wall (24) which are symmetrically arranged; The first bottom wall (23) and the second bottom wall (24) are arranged obliquely, the first bottom wall (23) and the second bottom wall (24) are respectively provided with a plurality of the sound absorbing holes (25), and the inner surface of the first bottom wall (23) and the inner surface of the second bottom wall (24) are respectively connected to the sound absorbing layer (26).

4. The sound absorbing assembly according to claim 1, characterized in that: The elastic layer (22) is made of elastic rubber material.

5. An air inlet device, characterized in that: It comprises a fan assembly (3), a driving assembly (5) and a sound absorbing assembly (2) according to any one of claims 1 to 4; The fan assembly (3) is arranged above the elastic layer (22); The driving component (5) is connected to the sound absorbing component (2), and the driving component (5) can drive the sound absorbing component (2) to move toward or away from the fan component (3); when the sound absorbing component (2) moves toward the fan component (3), the fan component (3) can contact the elastic layer (22) and drive the elastic layer (22) to deform.

6. The air inlet device according to claim 5, characterized in that: The air inlet device also includes a mainframe housing (4); The sound absorbing component (2), the fan component (3) and the driving component (5) are all arranged in the main engine housing (4); the sound absorbing component (2) is slidably connected to the main engine housing (4) via a slide rail component (6).

7. The air inlet device according to claim 6, characterized in that: The slide rail assembly (6) and the drive assembly (5) are respectively arranged on two sides of the sound absorbing assembly (2); One side of the shell (21) is slidably connected to the main machine housing (4) via the slide rail assembly (6), and the other side of the shell (21) is connected to the main machine housing (4) via the drive assembly (5).

8. The air inlet device according to claim 6, characterized in that: The slide rail assembly (6) comprises a slide rail (61) and a sliding member (62); The slide rail (61) is fixed to the inner surface of the mainframe housing (4), the slide member (62) is connected to the housing (21), and the slide member (62) is slidably connected to the slide rail (61).

9. The air inlet device according to claim 5, characterized in that: The air intake device also includes a control component, and the drive component (5) and the fan component (3) are respectively connected to the control component.

10. A method for controlling an air inlet device, characterized in that: Used to control the air inlet device according to any one of claims 5 to 9, comprising the following steps: Acquire the actual working condition of the air inlet device, determine the frequency spectrum curve corresponding to the actual working condition, and match the frequency spectrum curve with the sound absorption coefficient curve with the best sound absorption effect; The moving distance of the sound absorbing component (2) is determined according to the sound absorption coefficient curve with the best sound absorption effect.

11. The air inlet device control method according to claim 10, characterized in that: Determining the frequency spectrum curve corresponding to the actual working condition comprises the following steps: Establishing a plurality of standard operating conditions of the air intake device according to the plurality of power intervals of the air intake device; Establishing the frequency spectrum curves corresponding to a plurality of the standard working conditions; The corresponding standard working condition is selected according to the actual working condition, and the corresponding frequency spectrum curve is determined according to the selected standard working condition.

12. The air inlet device control method according to claim 10, characterized in that: Matching the spectrum curve with a sound absorption coefficient curve having the best sound absorption effect comprises the following steps: Establishing a sound absorption coefficient curve of the sound absorption component (2) corresponding to a plurality of sound absorption cavity volume conditions; establishing a combination model of the frequency spectrum curve and the sound absorption coefficient curve, wherein the combination model can match the sound absorption coefficient curve with the best sound absorption effect for any of the frequency spectrum curves; The selected frequency spectrum curve is input into the combination model to determine the sound absorption coefficient curve with the best sound absorption effect.

13. The air inlet device control method according to claim 10, characterized in that: The following steps are also included: The sound absorbing component (2) is driven to move according to the moving distance of the sound absorbing component (2).

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