Noise reduction structure and equipment with noise reduction structure

Abstract

The invention relates to a noise reduction structure and equipment with the noise reduction structure, and belongs to the technical field of noise reduction. The noise reduction structure comprises an air opening and an air duct connected with the air opening; air enters or exits from the air duct through the air port; the air channel is in a curve shape, and a fillet structure is arranged at the corner of the air channel. The air duct is arranged to be in the curve shape, turbulence and noise generated during air flowing can be reduced through the curve-shaped air duct, air flowing can be more stable, noise is reduced, and the noise reduction effect is improved. According to the air duct, the fillet structures are arranged at the corners of the air duct, the fillet structures can buffer air flow and reduce vortex and turbulence noise generated by fluid movement, then sudden change of air flow can be relieved, noise generated by air flow is reduced, and the noise reduction effect is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of noise reduction, and in particular relates to a noise reduction structure and a device having the noise reduction structure. Background Art

[0002] For pet owners, during the pet care process, such as drying, combing, trimming and caring for the pet's hair, the motor of the hair dryer or care machine will produce a lot of noise. Since pets have relatively sensitive hearing, the noise that is acceptable to humans may cause great distress to pets. Therefore, pets often show irritability, stress or even resistance during the care process. Summary of the invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a noise reduction structure and a device having the noise reduction structure.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] First aspect

[0006] The present invention provides a noise reduction structure, comprising: an air outlet and an air duct connected to the air outlet;

[0007] The air duct takes in or out air through the air outlet;

[0008] The air duct is in a curved shape, and a rounded structure is arranged at the corner of the air duct.

[0009] Furthermore, the air duct surface is non-planar.

[0010] Furthermore, a sound-absorbing coating is provided on the surface of the air duct.

[0011] Furthermore, the channel is formed by spacing between a first component and a second component, a sound-generating unit is provided on a side of the first component away from the channel, and the channel is used for performing noise reduction processing on the sound emitted by the sound-generating unit.

[0012] Furthermore, functional accessories are arranged in the channel, and the functional accessories are arranged along the wind direction.

[0013] Furthermore, the functional attachment is spiral-shaped.

[0014] Furthermore, a rounded corner structure is provided at the corner of the functional accessory.

[0015] Furthermore, the noise reduction structure further includes: a first noise reduction unit and a second noise reduction unit;

[0016] The first noise reduction unit is wrapped around the circumferential wall surface of the sound generating unit;

[0017] A noise reduction chamber is formed between the first noise reduction unit and the sound generating unit;

[0018] The second noise reduction unit is arranged around the first noise reduction unit;

[0019] The second noise reduction unit includes a noise reduction beam in contact with the first noise reduction unit.

[0020] Further, the second noise reduction unit includes a noise reduction point;

[0021] The noise reduction point contacts the first noise reduction unit, and the noise reduction beam is connected to the noise reduction point.

[0022] Second aspect

[0023] The present invention provides a device with a noise reduction structure, characterized in that it comprises: the noise reduction structure described in the first aspect and a sound generating unit.

[0024] The beneficial effects of the present invention are embodied in:

[0025] First, by setting the air duct into a curved shape, the curved air duct can reduce the turbulence and noise generated during air flow, help make the air flow smoother, thereby reducing noise and improving the noise reduction effect.

[0026] Secondly, by setting a rounded corner structure at the corner of the air duct, the rounded corner structure can buffer the air flow and reduce the noise of eddy currents and turbulence caused by fluid movement, thereby alleviating the sudden change of air flow, thereby reducing the noise generated by the airflow and further improving the noise reduction effect.

[0027] Thirdly, by setting the air duct into a curved shape and providing rounded corners at the corners of the air duct, the air duct structure is improved in many aspects, the noise is reduced, and the negative harm of noise to pets is alleviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 One of the structural schematic diagrams of a noise reduction structure provided by the present invention;

[0029] Figure 2 A second structural schematic diagram of a noise reduction structure provided by the present invention;

[0030] Figure 3 The third structural schematic diagram of a noise reduction structure provided by the present invention;

[0031] Figure 4 This is one of the bottom views of a noise reduction structure provided by the present invention (the noise reduction structure is a parallel structure);

[0032] Figure 5The second bottom view of a noise reduction structure provided by the present invention (the noise reduction structure is a central divergent structure);

[0033] Figure 6 This is a third bottom view of a noise reduction structure provided by the present invention (the noise reduction structure is a central ring structure).

[0034] Description of reference numerals:

[0035] 1. Air outlet; 2. Air duct; 3. Sound-emitting unit; 4. Functional accessories; 5. First noise reduction unit; 501. Noise reduction chamber; 5011. First noise reduction surface; 5012. Second noise reduction surface; 6. Second noise reduction unit; 601. Noise reduction point; 602. Noise reduction beam. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Manual Attached Figure 1 , showing one of the structural schematic diagrams of a noise reduction structure provided by the present invention.

[0038] Reference Manual Attached Figure 2 , shows the second structural schematic diagram of a noise reduction structure provided by the present invention.

[0039] Reference Manual Attached Figure 3 , showing the third structural schematic diagram of a noise reduction structure provided by the present invention.

[0040] Reference Manual Attached Figure 4 , showing one of the bottom views of a noise reduction structure provided by the present invention (the noise reduction structure is a parallel structure).

[0041] Reference Manual Attached Figure 5 , showing a second bottom view of a noise reduction structure provided by the present invention (the noise reduction structure is a central divergent structure).

[0042] Reference Manual Attached Figure 6 , showing a third bottom view of a noise reduction structure provided by the present invention (the noise reduction structure is a central ring structure).

[0043] The specific embodiments provided by the present invention are as follows:

[0044] Embodiment 1

[0045] like Figures 1 to 6As shown, the first embodiment of the present invention provides a noise reduction structure, including: an air outlet 1 and an air duct 2 connected to the air outlet 1 .

[0046] The air duct 2 takes in or discharges air through the air outlet 1.

[0047] It should be noted that the air outlet 1 can be divided into an air inlet 1 and an air outlet 1 according to different functions, and correspondingly, the air duct 2 can also be divided into an air inlet channel and an air outlet channel.

[0048] The air duct 2 often appears in equipment that requires air flow, such as a hair dryer, a water absorber, etc. The present invention does not limit the specific application scenario of the air duct 2.

[0049] The air duct 2 is curved. By setting the air duct 2 in a curved shape, the curved air duct 2 can reduce turbulence and noise generated when the air flows, which helps to make the air flow more stable, thereby reducing noise and improving the noise reduction effect.

[0050] Furthermore, in addition to reducing noise, the curved air duct 2 can also reduce resistance, increase wind speed, and improve wind transmission efficiency, which is crucial for devices such as hair dryers and water extractors.

[0051] Specifically, the air duct 2 being curved may refer to the air duct 2 extending in a spiral curve. The spiral curve design of the air duct 2 helps to make the air flow smoother and reduce the occurrence of turbulence.

[0052] Furthermore, there are no sharp angles in the extension process of the air duct 2, which can easily lead to instability in air flow and may cause vibration and noise. By ensuring that there are no sharp angles in the extension process of the air duct 2, instability in air flow can be avoided and system vibration and noise can be reduced.

[0053] A rounded corner structure is provided at the corner of the air duct 2. By providing a rounded corner structure at the corner of the air duct 2, the rounded corner structure can buffer the air flow and reduce the noise of eddy currents and turbulences generated by fluid movement, thereby reducing the sudden change of air flow, thereby reducing the noise generated by the airflow and further improving the noise reduction effect.

[0054] Thirdly, by setting the air duct 2 into a curved shape and providing a rounded structure at the corners of the air duct 2, the structure of the air duct 2 is improved in many aspects, the noise is reduced, and the negative harm of noise to pets is alleviated.

[0055] In a possible implementation, the surface of the air duct 2 is non-planar.

[0056] The non-planar surface includes a curved surface, a folded line surface or a concave-convex surface.

[0057] It can be understood that the surface of the air duct 2 is rough and uneven.

[0058] In the present invention, by setting the surface of the air duct 2 to be non-planar, the reflection and scattering of noise on the surface is increased, the noise energy consumption is increased, and the noise reduction effect is improved. At the same time, the design of the non-planar surface can achieve noise reduction effects in more directions. Curves or concave-convex structures in different directions can reflect or absorb sound waves in different incident directions, thereby improving the noise reduction performance of the system in multiple directions.

[0059] In a possible implementation, a sound-absorbing coating is provided on the surface of the air duct 2 .

[0060] Among them, sound-absorbing coating is a special coating designed to reduce sound reflection and absorb noise. These coatings usually include sound-absorbing materials that can effectively convert sound energy into heat energy or mechanical vibration, thereby reducing the reflection and propagation of sound.

[0061] Optionally, the sound-absorbing coating may specifically be sound-absorbing foam, fiberglass board, polyetherketone foam, porous ceramic coating, polystyrene particle board, etc. The present invention does not limit the specific type of the sound-absorbing coating.

[0062] In the present invention, the sound-absorbing coating can effectively absorb the noise generated when the air flows through the air duct 2, which helps to reduce the overall noise level of the system and provide a noise reduction effect. At the same time, the sound-absorbing coating on the surface of the air duct 2 helps to prevent the sound from being reflected inside the air duct 2, reduces the propagation of the sound, and can avoid the accumulation and propagation of the sound, thereby better controlling the noise.

[0063] In a possible implementation, the channel is formed by spacing the first component and the second component, a sound unit 3 is provided on a side of the first component away from the channel, and the channel is used to perform noise reduction processing on the sound emitted by the sound unit 3 .

[0064] The first component and the second component may specifically be components such as a housing, a partition, a wall, etc. The present invention does not limit the specific forms of the first component and the second component.

[0065] In the present invention, the propagation of the noise emitted by the sound-emitting unit 3 can be blocked to a certain extent by setting the channel, and the sound insulation effect can be achieved to a certain extent to prevent the noise from spreading to the surrounding environment.

[0066] Especially when ventilation is in the channel, the wind can change the direction of sound wave propagation, weaken the propagation of noise to the outside, and further enhance the noise reduction effect.

[0067] At the same time, by forming a channel between the first component and the second component, the resonance effect of the internal structure can also be reduced. Resonance may cause structural vibration and increase the possibility of noise generation. The occurrence of resonance can be reduced by introducing the channel.

[0068] In a possible implementation, a functional attachment 4 is arranged in the channel, and the functional attachment 4 is arranged along the wind direction.

[0069] Optionally, the functional accessory 4 may be a functional module such as a filtering unit, a heating unit, an air guiding unit, etc. The present invention does not limit the specific type of the functional accessory 4.

[0070] The functional attachment 4 is arranged along the wind direction, which means that the cross section of the functional attachment 4 perpendicular to the wind direction is minimized, that is, the blocking effect of the functional attachment 4 on the wind flow is minimized.

[0071] Specifically, when the functional attachment 4 is a sheet-like device, its extending direction is substantially consistent with the flow direction of the wind.

[0072] like Figure 2 As shown, taking a hair dryer as an example, the wind flow generated by the sound unit 3 (motor) is a whirlwind. At this time, the functional accessory 4 (wind guide accessory 41) is designed as a spiral blade along the wind direction, which can reduce the wind resistance when the wind flows through the wind guide accessory 41 and reduce the noise generated. Similarly, the functional accessory 4 (boost accessory 42) at the outlet is also designed to be spiral along the wind direction, which can reduce the wind resistance when the wind flows through the boost accessory 42 and reduce the noise generated. At the same time, because the space of the boost accessory 42 at the outlet gradually becomes narrower, the wind pressure when the wind blows out from the outlet is increased.

[0073] In the present invention, by arranging the functional attachment 4 along the wind direction, the resistance of air flowing through the functional attachment 4 can be reduced, and the noise of air passing through the functional attachment 4 can be avoided, which helps to optimize the airflow dynamics of the system and improve the wind transmission efficiency of the entire channel.

[0074] In a possible implementation, the functional attachment 4 is spiral-shaped.

[0075] In the present invention, the functional attachment 4 is set to be spiral, which can further reduce the resistance of air flowing through the functional attachment 4, reduce the noise during air flow, and improve the noise reduction effect. At the same time, the design of the spiral functional attachment 4 can effectively guide the air flow and improve the wind power transmission efficiency. The spiral shape structure can produce a vortex effect, increase the kinetic energy of the air flow, and make the wind power transmission more efficient.

[0076] In a possible implementation manner, a rounded structure is provided at the corner of the functional attachment 4 .

[0077] In the present invention, by providing a rounded corner structure at the corner of the functional attachment 4, the rounded corner structure can buffer the air flow and reduce the noise of eddy currents and turbulences generated by fluid movement, thereby alleviating the sudden change of air flow, thereby reducing the noise generated by the airflow and further improving the noise reduction effect.

[0078] In a possible implementation, the noise reduction structure further includes: a first noise reduction unit 5 and a second noise reduction unit 5 .

[0079] The first noise reduction unit 5 is wrapped around the circumferential wall surface of the sound generating unit 3 .

[0080] A noise reduction chamber 501 is formed between the first noise reduction unit 5 and the sound generating unit 3 .

[0081] Optionally, the noise reduction chamber 501 is arranged on the first noise reduction unit 5. The noise reduction chamber 501 can be a groove with a special shape. The noise reduction chamber 501 has a noise reduction opening on the side facing the sound unit 3. The noise emitted by the sound unit 3 enters the noise reduction chamber 501 through the noise reduction opening.

[0082] It should be noted that the noise reduction chamber 501 formed between the first noise reduction unit 5 and the sound generating unit 3 can effectively slow down the propagation speed of the sound waves, increase the chance of the sound waves interacting with the surface of the noise reduction chamber 501, increase the sound absorption effect, and improve the noise reduction performance.

[0083] The second noise reduction unit 5 is disposed around the first noise reduction unit 5 .

[0084] The second noise reduction unit 5 comprises a noise reduction beam 502 in contact with the first noise reduction unit 5 .

[0085] It should be noted that the noise reduction beam 502 of the second noise reduction unit 5 guides the noise to propagate in a specific direction, disperses the noise, and at the same time extends the noise propagation path. It continuously consumes and absorbs the noise during the propagation process to quickly achieve the noise reduction effect and ensure effective isolation between the noise emission site and the external environment.

[0086] It is understandable that the decibel of the noise generated by the sound unit 3 is the highest at the source, and then spreads from the source to the surroundings through the propagation path. The idea of ​​the conventional noise reduction structure is to confine the noise to a certain area to perform noise reduction intervention in this area, avoid the separation of the noise reduction area from the rest of the area, and thus avoid the outward conduction of noise. However, the method of confining noise reduction will cause the noise to concentrate in this area, thereby increasing the load of the noise reduction structure, and the noise reduction effect is difficult to predict.

[0087] In the present invention, the first noise reduction unit 5 is used to wrap the sound generating unit 3 at the source, and the noise at the source is effectively eliminated by means of the noise reduction chamber 501. And the noise reduction beam 502 of the second noise reduction unit 5 is used on the propagation path to guide the propagation of the noise, disperse the noise, and extend the propagation path of the noise, and continuously consume and absorb the noise during the propagation process to quickly achieve the effect of noise reduction. The first noise reduction unit 5 is used in conjunction with the second noise reduction unit 5 to form a multi-level noise reduction structure, so that the noise generated by the sound generating unit 3 can be effectively absorbed and eliminated at the source and during the propagation process, thereby reducing the negative harm of noise to pets.

[0088] In a possible implementation, the second noise reduction unit 5 includes a noise reduction point 501 .

[0089] The noise reduction point 501 contacts the first noise reduction unit 5 , and the noise reduction beam 502 is connected to the noise reduction point 501 .

[0090] The noise reduction point 501 is used to collect scattered noise and transmit it to the noise reduction beam 502 so as to perform noise reduction processing through the noise reduction beam 502 .

[0091] The noise reduction point 501 may be a sphere, a cylinder or other geometric bodies made of sound-absorbing material. The present invention does not limit the shape and material of the noise reduction point 501 .

[0092] Optionally, the area of ​​the noise reduction point 501 satisfies:

[0093] 0.3×S2≦S1≦0.7×S2

[0094] Wherein, S1 represents the area of ​​the noise reduction point 501 , and S2 represents the axial flow area of ​​the sound unit 3 .

[0095] For the sound generating unit 3, such as a fan, the increase in the area absorbing the airflow will lead to an increase in the flow rate of the airflow, which in turn leads to an increase in the noise generated by the impact and collision of the airflow. Therefore, it is necessary to limit the correlation between the area of ​​the collection surface and the axial flow area to ensure that the collection surface can be in a better noise reduction area.

[0096] In the present invention, by setting the noise reduction point 501, the noise can be effectively collected and transmitted to the noise reduction beam 502 for noise reduction processing, which helps to achieve orderly transmission and processing of noise and improve the overall noise reduction performance.

[0097] In a possible implementation, the width of the noise reduction beam 502 satisfies:

[0098] 0.4×D≦H≦0.6×D

[0099] Here, H represents the width of the noise reduction beam 502 , and D represents the diameter of the noise reduction point 501 .

[0100] The purpose of this parameter limitation is that the diameter of the noise reduction point 501 determines the amount of noise it absorbs. If it absorbs a large amount of noise at a certain time point, multiple noise reduction beams 502 are required to disperse in coordination to achieve a process of rapid decomposition and consumption of noise, improve noise elimination efficiency, and avoid noise outward conduction.

[0101] In a possible implementation manner, the specific shape of the noise reduction beam 502 may be a straight line, a curve and / or a broken line, and the present invention does not limit the specific shape of the noise reduction beam 502 .

[0102] In a possible implementation manner, the noise reduction beam 502 is based on the noise reduction point 501 and is radial or multi-ring shaped.

[0103] Here, radial means that a plurality of noise reduction beams 502 extend outwards from the noise reduction point 501 as a base point.

[0104] The multi-ring shape means that on the basis of the radial shape, the radial noise reduction beam 502 is connected by multiple ring noise reduction beams 502. Thus, the multiple radial noise reduction beams 502 have multiple intersection points to increase the interference between noises, thereby improving the noise reduction effect in a possible implementation manner.

[0105] Optionally, the annular noise reduction beam 502 may be a circular ring or a polygonal ring.

[0106] In the present invention, the radial or multi-ring noise reduction beam 502 design can increase the number and length of the noise reduction beam 502 within a limited space, thereby extending the propagation path of the noise, and continuously consuming and absorbing the noise during the propagation process to quickly achieve the effect of noise reduction. At the same time, the radial or multi-ring noise reduction beam 502 allows the noise to have more path choices during the propagation process, weakens the noise energy, and improves the noise reduction effect.

[0107] In a possible implementation manner, the noise reduction point 501 is opposite to the sound generating unit 3 .

[0108] In the present invention, by placing the noise reduction point 501 directly opposite to the sound unit 3, the noise source from the sound unit 3 can be more effectively captured, reducing noise leakage, so that most of the noise can be absorbed by the noise reduction point 501, and then noise reduction processing is performed through the noise reduction beam 502.

[0109] In a possible implementation manner, the noise reduction point 501 includes a primary noise reduction point 501 and a secondary noise reduction point 501. The primary noise reduction point 501 is opposite to the sound generating unit 3, and the secondary noise reduction point 501 is arranged on the noise reduction beam 502.

[0110] Taking the aforementioned multi-annular noise reduction beam 502 as an example, a secondary noise reduction point 501 may be set at the intersection of the radial noise reduction beam 502 and the annular noise reduction beam 502 .

[0111] In the present invention, a secondary noise reduction point 501 is added to the noise reduction beam 502 to increase the noise collection area, thereby improving the noise reduction effect in a possible implementation manner.

[0112] In a possible implementation, the noise reduction chamber 501 is in a sawtooth shape.

[0113] It can be understood that the sawtooth-shaped noise reduction chamber 501 has a plurality of sub-noise reduction chambers 501 .

[0114] Optionally, the sub-noise reduction chamber 501 includes a first noise reduction surface 5011 and a second noise reduction surface 5012. The first noise reduction surface 5011 and the second noise reduction surface 5012 are provided with noise reduction openings on a side close to the sound emitting unit 3. The noise emitted by the sound emitting unit 3 enters the sub-noise reduction chamber 501 through the noise reduction opening to ensure comprehensive collection of the noise emitted by the sound emitting unit 3.

[0115] Optionally, the angle between the first noise reduction surface 5011 and the second noise reduction surface 5012 is between 30° and 120°.

[0116] Optionally, the distance between the noise reduction opening and the circumferential wall surface of the sound generating unit 3 is 0 or close to 0 to avoid noise leakage.

[0117] In the present invention, by setting the noise reduction chamber 501 to a serrated shape, the contact area between the noise and the surface of the noise reduction chamber 501 can be increased, and the noise can be effectively absorbed, scattered or reflected, so that the noise is absorbed and consumed, thereby improving the overall noise reduction performance.

[0118] In a possible implementation, the surface of the noise reduction chamber 501 is non-planar.

[0119] The non-planar surface includes a curved surface, a folded line surface or a concave-convex surface.

[0120] In the present invention, by setting the surface of the noise reduction chamber 501 to be non-planar, the reflection and scattering of noise on the surface is increased, the noise energy consumption is increased, and the noise reduction effect is improved. At the same time, the design of the non-planar surface can achieve noise reduction effects in more directions, and the curves or concave-convex structures in different directions can reflect or absorb sound waves in different incident directions, thereby improving the noise reduction performance of the system in multiple directions.

[0121] In a possible implementation, when the angle between the first noise reduction surface 5011 and the second noise reduction surface 5012 is between 30° and 120°, it can ensure that the number of reflections and scatterings of noise in the noise reduction chamber 501 increases or the reflection distance increases, so as to improve the noise elimination effect.

[0122] In a possible implementation, the specific values ​​of various noise reduction structural parameters may be determined by a simulated annealing algorithm, and the specific determination method includes the following steps:

[0123] Initialize the population, initial temperature T0, maximum number of iterations, termination temperature T m The population contains multiple individuals, each of which represents a feasible set of structural parameters θ.

[0124] Specifically, the structural parameter set θ may include: duct fillet size, duct surface structure, sound-absorbing coating material, functional accessory fillet size, functional accessory spiral parameter, number of noise reduction points, noise reduction point area, number of noise reduction beams, noise reduction beam angle, noise reduction beam width, the angle between the first noise reduction surface and the second noise reduction surface, etc. The present invention does not limit the specific types of structural parameters.

[0125] The fitness function of the simulated annealing algorithm is constructed with the goal of achieving the best noise reduction effect.

[0126] Among them, the fitness function can be specifically:

[0127]

[0128] Among them, σ() represents the fitness function, dB0 represents the intensity value of the initial noise, and dB(θ) represents the intensity value of the noise after denoising with the structural parameter set θ.

[0129] In the present invention, the fitness function takes the best noise reduction effect as the optimization goal, and clarifies the best solution that the simulated annealing algorithm needs to find. This helps the algorithm focus more on improving the noise reduction effect, rather than simply exploring the search space. Through the fitness function, different parameter combinations can be quantitatively evaluated, so as to intuitively compare the noise reduction effects of different parameter combinations. This helps to select the best set of structural parameters and improve the performance of the noise reduction system.

[0130] Randomly select the current individual and generate neighborhood individuals based on the current individual.

[0131] Compare the fitness values ​​of the current individual with those of the neighboring individuals. When the fitness value of the neighboring individual is greater than the fitness value of the current individual, use the neighboring individual to replace the current individual. When the fitness value of the neighboring individual is less than the fitness value of the current individual, use the neighboring individual to replace the current individual with a replacement probability P.

[0132] The replacement probability P is specifically:

[0133]

[0134] Among them, P represents the replacement probability, exp represents the exponential function with e as the base, and θ new represents the neighborhood individuals, σ(θnew ) represents the fitness value of the neighborhood individual, θ t represents the current individual, σ(θ t ) represents the fitness value of the current individual, and T represents the current temperature.

[0135] In the present invention, when the fitness value of a neighborhood individual is less than that of the current individual, although the neighborhood individual may not be the optimal solution, there is still a certain probability of accepting the neighborhood individual based on the replacement probability, which helps to avoid the algorithm from falling into a local optimal solution and improves the ability to search for a global optimal solution.

[0136] Determine whether the current number of iterations has reached the maximum number of iterations, or whether the current temperature has reached the termination temperature T m If yes, output the optimal model parameters. Otherwise, update the temperature, perform chaotic perturbations on the positions of individuals with fitness values ​​less than the average, and continue to generate neighborhood individuals for iteration.

[0137] In a possible implementation, the temperature update method is:

[0138] T i+1 =α·T i

[0139] Where α represents the temperature drop coefficient, T i+1 represents the temperature at the i+1th iteration, T i represents the temperature at the i-th iteration, and T0 represents the initial temperature.

[0140] In the present invention, an exponential temperature reduction method is adopted so that the temperature reduction rate is controlled by the temperature reduction coefficient α. This can gradually reduce the temperature, so that the simulated annealing algorithm gradually reduces the probability of accepting inferior solutions during the search process, thereby focusing more on accepting superior solutions, which helps to improve the quality of the final optimization result.

[0141] In a possible implementation, the specific method of performing chaotic perturbation on individual positions with fitness values ​​less than the average is as follows:

[0142] Y i+1 =ρY i (1-Y i )

[0143] Among them, Y i+1 represents the individual position at the i+1th iteration, Y i represents the individual position at the i-th iteration, and ρ represents the disturbance parameter.

[0144] In the present invention, chaotic perturbation introduces randomness, so that the update of individual positions does not completely depend on the change of fitness function, thereby increasing the diversity and exploration of the algorithm. This helps to avoid the algorithm from falling into the local optimal solution and improves the algorithm's global search capability.

[0145] Embodiment 2

[0146] The present invention provides a device with a noise reduction structure, characterized in that it comprises: the noise reduction structure of the first aspect and a sound generating unit.

[0147] The beneficial effects of the present invention are embodied in:

[0148] First, by setting the air duct into a curved shape, the curved air duct can reduce the turbulence and noise generated during air flow, help make the air flow smoother, thereby reducing noise and improving the noise reduction effect.

[0149] Secondly, by setting a rounded corner structure at the corner of the air duct, the rounded corner structure can buffer the air flow and reduce the noise of eddy currents and turbulence caused by fluid movement, thereby alleviating the sudden change of air flow, thereby reducing the noise generated by the airflow and further improving the noise reduction effect.

[0150] Thirdly, by setting the air duct into a curved shape and providing rounded corners at the corners of the air duct, the air duct structure is improved in many aspects, the noise is reduced, and the negative harm of noise to pets is alleviated.

[0151] In the description of the embodiments of the present invention, it needs to be understood that terms such as “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “center”, “top”, “bottom”, “top”, “bottom”, “inside”, “outside”, “inside”, and “outside” indicate orientation or positional relationships.

[0152] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0153] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0154] In the description of the embodiments of the present invention, it is to be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0155] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0156] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure, characterized in that: include: An air outlet and an air duct connected to the air outlet; The air duct takes in or out air through the air outlet; The air duct is in a curved shape, and a rounded structure is arranged at the corner of the air duct.

2. The noise reduction structure according to claim 1, characterized in that: The air duct surface is non-planar.

3. The noise reduction structure according to claim 1, characterized in that: The surface of the air duct is provided with a sound absorbing coating.

4. The noise reduction structure according to claim 1, characterized in that: The channel is formed by spacing between a first component and a second component, a sound generating unit is arranged on a side of the first component away from the channel, and the channel is used for performing noise reduction processing on the sound generated by the sound generating unit.

5. The noise reduction structure according to claim 1, characterized in that: Functional accessories are arranged in the channel, and the functional accessories are arranged along the wind direction.

6. The noise reduction structure according to claim 5, characterized in that: The functional appendage is in a spiral shape.

7. The noise reduction structure according to claim 5, characterized in that: The corners of the functional attachment are provided with rounded corner structures.

8. The noise reduction structure according to claim 4, characterized in that: Also includes: a first noise reduction unit and a second noise reduction unit; The first noise reduction unit is wrapped around the circumferential wall surface of the sound generating unit; A noise reduction chamber is formed between the first noise reduction unit and the sound generating unit; The second noise reduction unit is arranged around the first noise reduction unit; The second noise reduction unit includes a noise reduction beam in contact with the first noise reduction unit.

9. The noise reduction structure according to claim 8, characterized in that: The second noise reduction unit includes a noise reduction point; The noise reduction point contacts the first noise reduction unit, and the noise reduction beam is connected to the noise reduction point.

10. A device having a noise reduction structure, characterized in that: include: The noise reduction structure and the sound generating unit according to claims 1 to 9.

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