Refrigerating and freezing device, air duct structure and design method of air duct structure

Abstract

The invention relates to the technical field of air duct noise reduction, in particular to a refrigerating and freezing device, an air duct structure and a design method of the air duct structure. The design method comprises the steps that S100, the design domain of the air duct is obtained, and the preset number and the preset size of the fins are obtained; s200, obtaining target vibration and noise reduction performance; s300, a non-uniform fin layout optimization model is established at least according to the target vibration and noise reduction performance, the design domain, the preset number and the preset size, and an optimization column formula is given; and S400, solving the optimization column formula to obtain an optimal solution of fin distribution. By the adoption of the design method, the non-uniform air duct structure capable of meeting the target vibration and noise reduction performance can be obtained. In the air duct structure, the fins are non-uniformly distributed in the air duct, and compared with an existing mode that the fins are uniformly distributed in the air duct, on the premise that the number of the fins is not increased, the vibration and noise reduction effect of the air duct structure can be remarkably improved, and the production cost is not increased. Furthermore, the freezing and refrigerating device can have a good mute effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air duct noise reduction, and particularly to a refrigerating and freezing device, an air duct structure and a design method of the air duct structure. Background Art

[0002] At present, the rotation of the fan will generate certain noise, and the cold air flows to various parts of the refrigerator after passing through the air duct. Therefore, the structural form of the air duct plays a decisive role in the noise reduction of the refrigerator fan air duct system. The noise in the air duct is mainly aerodynamic noise, that is, air flow noise. In order to reduce the air flow noise, a uniform plate-fin air duct structure has been designed at present, which includes an air duct and a plurality of strip fins. The plurality of strip fins are distributed in the air duct in a rectangular array for reducing the vibration and noise of the air flow noise in the air duct. However, since the sound field itself is an inhomogeneous field and the propagation of sound waves is also non-uniform, it is obvious that using uniform fins for the structural design of the plate-fin air duct is not the most ideal design. Therefore, the sound insulation and noise reduction effect of the existing air duct structure is not good, which has become a bottleneck restricting the development of silent refrigerators. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a refrigerating and freezing device, an air duct structure and a design method of the air duct structure that can overcome or at least partially solve the above problems, which can solve the problem of poor noise reduction effect of the existing air duct structure and achieve the purpose of improving the silent effect of the refrigerator.

[0004] On the one hand, the present invention provides a design method of an air duct structure, including:

[0005] S100, obtaining a design domain of the air duct and obtaining a preset number and a preset size of the fins;

[0006] S200, obtaining a target vibration and noise reduction performance;

[0007] S300, establishing a non-uniform fin layout optimization model at least according to the target vibration and noise reduction performance, the design domain, the preset number and the preset size, and giving an optimization formulation;

[0008] S400, solving the optimization formulation to obtain an optimal solution of the fin distribution.

[0009] Optionally, the preset size includes at least one of a preset length, a preset width and a preset height.

[0010] Optionally, the optimization formulation includes design variables, an objective function and constraint conditions;

[0011] The design variables are the position coordinates of each fin;

[0012] The objective function is the simulated vibration and noise reduction performance based on the design variables;

[0013] The constraint conditions at least include the non - overlapping constraint condition of adjacent fins and the position coordinate constraint condition.

[0014] Optionally, the position coordinates of each fin are the three - dimensional coordinates of the center position of each fin;

[0015] The non - overlapping constraint condition of adjacent fins at least includes:

[0016]

[0017] where x i , y i and z i are the three - dimensional coordinates of the i - th fin;

[0018] x i0 , y i0 and z i0 are the three - dimensional coordinates of the fin adjacent to the i - th fin;

[0019] d is a preset value.

[0020] Optionally, the preset size of the fin includes a preset length;

[0021] The preset value is not less than the preset length.

[0022] Optionally, solving the optimization formulation includes: solving the optimization formulation based on an optimization algorithm of deep learning; and / or

[0023] After step S400, it further includes: S500, obtaining the air duct structure based on the optimal solution of the fin distribution.

[0024] Optionally, step S400 includes:

[0025] S401, setting optimization initial parameters, where the optimization initial parameters at least include the maximum number of iterations and the convergence condition;

[0026] S402, calculating the objective function value;

[0027] S403, calculating the constraint conditions;

[0028] S404, performing iterative calculation in a loop. The loop ends when the maximum number of iterations is reached or the convergence condition is met, otherwise the loop continues;

[0029] S405, the optimization ends, and the optimal solution of the fin distribution is obtained.

[0030] The present invention also provides an air duct structure, and the design model for manufacturing the air duct structure is obtained by at least the design method described in any one of the above.

[0031] The air duct structure includes:

[0032] An air duct;

[0033] A plurality of fins, and the plurality of fins are non-uniformly distributed in the air duct.

[0034] Optionally, the inlet and outlet of the air duct are respectively arranged at the diagonal corners of the air duct; and / or

[0035] There is a gap between the fin and the peripheral wall of the air duct to form an air flow channel; and / or

[0036] The fin is made of a sound-absorbing material; and / or

[0037] The fin is a strip fin.

[0038] On the other hand, the present invention also provides a refrigerating and freezing device, including a box body, and the air duct structure described in any one of the above is arranged in the box body.

[0039] In the refrigerating and freezing device, air duct structure and design method of the air duct structure of the present invention, based on the target vibration and noise reduction performance, design domain of the air duct, preset number and preset size of the fins in the air duct, a non-uniform fin layout optimization model is established. By solving the above non-uniform fin layout optimization model, the optimal solution of non-uniform distribution of the fins can be obtained. That is to say, by using the design method of the present invention, a non-uniform air duct structure that can meet the target vibration and noise reduction performance can be obtained. In this air duct structure, the fins are non-uniformly distributed in the air duct. Compared with the existing way that the fins are uniformly distributed in the air duct, without increasing the number of fins, the vibration and noise reduction effect of the air duct structure can be significantly improved, and the production cost will not be increased. Therefore, the refrigerating and freezing device adopting the air duct structure of the present invention can have a good sound insulation effect, thereby improving the user experience.

[0040] Furthermore, the design method of the air duct structure of the present invention can be applied to different types of refrigerator fan air duct systems for noise suppression.

[0041] In addition, the design method of the present invention has the beneficial effects of being scientific, reasonable, simple and easy to operate.

[0042] According to the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages and features of the present invention. Description of the Drawings

[0043] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an illustrative rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0044] Figure 1 is a schematic flow chart of a design method for an air duct structure according to an embodiment of the present invention;

[0045] Figure 2 is a schematic flow chart of a design method for an air duct structure according to an embodiment of the present invention;

[0046] Figure 3 is a schematic flow chart of a design method for an air duct structure according to an embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of the usage state of an air duct structure according to an embodiment of the present invention;

[0048] Figure 5 is a schematic structural diagram of a uniform air duct structure in the prior art;

[0049] Figure 6 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention. Detailed Embodiments

[0050] The following will be described with reference to Figures 1 to 6 a refrigeration and freezing device, an air duct structure, and a design method for an air duct structure according to an embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0051] Unless otherwise clearly defined or limited, terms such as "arranged", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0052] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. That is, in the description of this embodiment, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", or "beneath" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0053] In the description of this embodiment, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] Since the sound field itself is an inhomogeneous field and the propagation of sound waves is also non-uniform, it is obvious that using uniform fins for the structural design of the plate-fin air duct is not the most ideal design, resulting in poor sound insulation and noise reduction effects of the air duct structure. Therefore, we need to find a non-uniform layout of the fins with a greater degree of design freedom, and then it is more likely to find the optimal design that meets the required vibration and noise reduction performance, and achieve further improvement in the noise reduction effect of the non-uniform plate-fin air duct structure.

[0055] Figure 1 is a schematic flowchart of the design method of the air duct structure 110, as Figure 1 shown, and with reference to Figures 2 - 4 the present invention provides an embodiment of a design method for an air duct structure 110.

[0056] A design method for an air duct structure may include the following steps:

[0057] S100, obtain the design domain of the air duct 111, and obtain the preset quantity and preset size of the fins 112;

[0058] S200, obtain the target vibration and noise reduction performance;

[0059] S300, establish a non-uniform fin layout optimization model at least based on the target vibration and noise reduction performance, design domain, preset quantity and preset size, and give the optimization formulation;

[0060] S400, solve the optimization formulation to obtain the optimal solution of the fin distribution.

[0061] In this embodiment, the design model of the air duct structure includes an air duct and a plurality of fins, and the plurality of fins are non-uniformly distributed in the air duct. The design domain of the air duct refers to the available area of the air duct. There are a plurality of fins in the air duct, and the preset sizes of each fin are the same. The optimization formulation is not fixed and can be set as needed. Different algorithms can be used to solve the optimization formulation. The optimal solution of the fin distribution means that the air duct structure corresponding to the fin distribution can achieve the target vibration and noise reduction performance or be closest to the target vibration and noise reduction performance.

[0062] In this embodiment, based on the target vibration and noise reduction performance, the design domain of the air duct, the preset quantity of the fins in the air duct, and the preset size, a non-uniform fin layout optimization model is established. By solving the above non-uniform fin layout optimization model, the optimal solution of the non-uniform fin distribution can be obtained. That is to say, by using the design method of the present invention, a non-uniform air duct structure that can meet the target vibration and noise reduction performance can be obtained. In this air duct structure, the fins are non-uniformly distributed in the air duct. Compared with the existing method in which the fins are uniformly distributed in the air duct, without increasing the number of fins, the vibration and noise reduction effect of the air duct structure can be significantly improved, and the production cost will not be increased. Therefore, the refrigeration and freezing device adopting the air duct structure of the present invention can have a good sound insulation effect, thereby improving the user experience. The design method of the air duct structure in this embodiment can be applied to different types of refrigerator fan air duct systems for noise suppression.

[0063] In some alternative embodiments of the present invention, the preset size of the fin 112 includes at least one of a preset length, a preset width, and a preset height.

[0064] In some alternative embodiments of the present invention, the optimization formulation includes design variables, an objective function, and constraint conditions. Among them, the design variables are the position coordinates of each fin 112; the objective function is the simulated vibration and noise reduction performance based on the design variables; the constraint conditions at least include non-overlapping constraint conditions between adjacent fins and position coordinate constraint conditions.

[0065] Specifically, the objective function is the simulated vibration and noise reduction performance of the current air duct structure based on the design variables. The non-overlapping constraint condition of adjacent fins means that any adjacent fins in the air duct do not overlap. The position coordinate constraint condition means that the position coordinates of each fin in the air duct design domain are within a preset range. This embodiment provides a specific optimization formulation, which is ingeniously designed and scientifically reasonable. Through this optimization formulation, it is convenient to obtain the optimal solution of the fin distribution.

[0066] In some alternative embodiments of the present invention, the position coordinates of each fin 112 are the three-dimensional coordinates of the center position of each fin.

[0067] The objective function is: min: Φ = f(x i , y i , z i )

[0068] The non-overlapping constraint condition of adjacent fins at least includes:

[0069]

[0070] The position coordinate constraint condition includes:

[0071]

[0072]

[0073]

[0074] Wherein, x i , y i , z i are respectively design variables; x i , y i and z i are the three-dimensional coordinates of the i-th fin; x i represents the transverse coordinate of the i-th fin, y i represents the longitudinal coordinate of the i-th fin, z i represents the vertical coordinate of the i-th fin; xi0, yi0 and zi0 are the three-dimensional coordinates of the fin adjacent to the i-th fin; f(x i , y i , z i ) is the vibration and noise reduction performance of the non-uniform plate-fin air duct corresponding to these three dimensional parameters, generally related to the indexes calculated by software; d is a preset value; is the preset minimum transverse coordinate of the i-th fin, is the preset maximum transverse coordinate of the i-th fin, is the preset minimum longitudinal coordinate of the i-th fin, is the preset maximum longitudinal coordinate of the i-th fin, is the preset minimum vertical and horizontal coordinate of the i-th fin. "x i -x i0 " refers to the difference in the horizontal coordinates between adjacent fins; "y i -y i0 " refers to the difference in the longitudinal coordinates between adjacent fins; "z i -z i0 " refers to the difference in the vertical coordinates between adjacent fins.

[0075] This embodiment provides a more specific optimization formula, which has the advantages of ingenious and scientific design; through this optimization formula, it is convenient to quickly obtain the optimal solution of the fin distribution.

[0076] In some alternative embodiments of the present invention, the preset size of the fin 112 includes a preset length; the preset value is not less than the preset length. That is, d≥L. Specifically, the fin is a strip fin.

[0077] In some alternative embodiments of the present invention, in step S400, solving the optimization formula includes: solving the optimization formula based on an optimization algorithm of deep learning. In some alternative embodiments, other optimization algorithms can also be used to solve the optimization formula. Specifically, the conventional deep learning search modes include CNN (convolutional neural network), LSTM (Long Short Term Memories), etc. The optimization algorithm based on deep learning is a process of automatic optimization, which obtains the optimal solution through iterative loops. In this embodiment, solving the optimization formula based on the optimization algorithm of deep learning can improve the efficiency and accuracy of obtaining the optimal solution.

[0078] In some alternative embodiments of the present invention, after step S400, the design method of the air duct structure further includes: S500, obtaining the air duct structure based on the optimal solution of the fin distribution.

[0079] In some alternative embodiments of the present invention, as Figure 2 shown, step S400 may include the following steps:

[0080] S401, setting the optimization initial parameters, and the optimization initial parameters at least include the maximum number of iterations and the convergence condition;

[0081] S402, calculating the objective function value;

[0082] S403, calculating the constraint condition;

[0083] S404, performing iterative loop calculations, and the loop ends when the maximum number of iterations is reached or the convergence condition is satisfied, otherwise continue the loop;

[0084] S405. The optimization ends, and the optimal solution of the fin distribution is obtained.

[0085] Specifically, the maximum number of iterations can be 600, 800, 1000, etc. The convergence condition is that the difference between the design variables of adjacent iteration steps is less than 0.001, that is, it is determined that the cyclic iteration terminates. Both the maximum number of iterations and the convergence accuracy in the convergence condition are set values, which can be specifically set as needed. In step S405, the optimization ends. On the premise of meeting the target vibration and noise reduction performance and constraint conditions, the optimal coordinates of each fin are obtained, and then the optimal solution of the fin distribution can be obtained. This embodiment provides a specific method for solving the optimal solution of design variables. By using the above method, the optimal solution can be quickly obtained.

[0086] In some other alternative embodiments of the present invention, the design variables can also be x i and y i . That is, the position coordinates of each fin are the two-dimensional coordinates of the center position of each fin.

[0087] In the preferred embodiment of the present invention, as Figure 3 shown, the design method of the air duct structure may further include the following steps:

[0088] S1. Determine the plate-fin air duct structure form, the size of the reserved area, and the total number of strip fins, and obtain the target vibration and noise reduction performance;

[0089] S2. Assume that the total number of uniformly arranged strip fins is n, and the i-th uniformly arranged strip fin is n i , the length of each strip fin is L, and the three-dimensional layout parameters are x i , y i and z i ;

[0090] S3. Establish an optimization model for the non-uniform layout of the plate-fin air duct based on the fin non-overlap constraint, and give the optimization formulation:

[0091]

[0092] S4. Set the initial optimization parameters, and the initial optimization parameters include at least the maximum number of iterations, the convergence condition, and d;

[0093] S5. Calculate the objective function value;

[0094] S6. Calculate the constraint conditions;

[0095] S7. Perform cyclic iterative calculations based on the optimization algorithm of deep learning. When the maximum number of iterations is reached or the convergence condition is met, the loop ends, otherwise continue the loop;

[0096] S8. The optimization is completed to obtain the optimal solution of the optimized column layout, that is, the optimal solution of the fin distribution, and finally determine the non-uniform layout of the plate-fin air duct.

[0097] In this embodiment, an optimization design method for the non-overlapping layout of the fins of the plate-fin air duct of an A-level silent refrigerator is provided. Since the position of each strip fin in the plate-fin air duct system has a great influence on the noise reduction performance of the refrigerator, the non-uniform layout of the strip fins is freely designed within the established air duct form and the non-overlapping constraints of each strip fin with each other in the layout design are considered to improve the noise reduction ability of the plate-fin air duct system. By designing the three-dimensional non-uniform layout of each strip fin within the size of the reserved area of the air duct, the noise reduction effect of the plate-fin air duct structure is further improved.

[0098] In summary, the non-uniform layout optimization design method of the plate-fin air duct based on the fin non-overlapping constraint of the present invention can achieve the required noise reduction effect of the plate-fin air duct structure. Further, the fin non-overlapping constraint can ensure that the strip fins do not overlap in the non-uniform layout design and have flexible design freedom. The non-uniform layout optimization method of the plate-fin air duct can be applied to different types of refrigerator fan air duct systems for noise suppression.

[0099] Figure 5 is the usage state diagram of the existing uniform air duct structure, Figure 4 is the usage state diagram of the non-uniform air duct structure of the present invention. It can be seen from the figure that the present invention significantly improves the vibration and noise reduction performance of the air duct structure.

[0100] On the other hand, the embodiment of the present invention also provides an air duct structure 110, and the design model for manufacturing the air duct structure is obtained by at least the design method of any one of the above. The air duct structure 110 includes an air duct 111 and a plurality of fins 112, and the plurality of fins 112 are non-uniformly distributed in the air duct 111.

[0101] As Figure 4 shown, the gap between any adjacent fins 112 forms a sound absorption cavity. There are a plurality of sound absorption cavities in the air duct 111, and the respective sound absorption cavities are interconnected with each other, thereby forming a combined noise reduction structure inside the air duct 111. During the operation of the refrigerator, when the airflow noise enters the air duct 111, the fins 112 in the air duct 111 can isolate and absorb the airflow noise, and the plurality of fins 112 constitute a combined noise reduction mechanism, which can significantly reduce the airflow noise, thereby solving the technical problem of high noise in the air duct 111 in the prior art, improving the sound quality of the refrigerator, and achieving the purpose of improving the user experience.

[0102] In this embodiment, the air duct structure 110 can be used in a refrigeration and freezing device 100 or an air conditioner. Adopting the air duct structure 110 of the present invention can reduce the overall noise of the refrigeration and freezing device 100; or, adopting the air duct structure 110 of the present invention can reduce the overall noise of the air conditioner.

[0103] In some alternative embodiments of the present invention, the fin 112 is made of a sound-absorbing material. For example, the sound-absorbing material can be an ABS material, a sound-absorbing metamaterial, an organic fiber sound-absorbing material, a metal sound-absorbing plate, an industrial rubber plate, etc. Preferably, the fin 112 is a sound-absorbing metamaterial. The sound-absorbing metamaterial (MAT metamaterial, MAT is the abbreviation of Metamaterial Absorption Technology) uses a synthetic material with high sound-absorbing efficiency, and it also has a complex maze-like texture structure. Each maze channel can absorb a specific frequency, and its sound-absorbing efficiency is as high as 99%. In addition, compared with general sound-absorbing materials, the sound-absorbing metamaterial has more stable chemical properties, is safer, has no odor, good elasticity, fireproof and flame-retardant, mildew-proof and antibacterial, and has a good hand feeling and weight feeling.

[0104] In some alternative embodiments of the present invention, the inlet 113 and the outlet 114 of the air duct 111 are respectively arranged at the diagonal corners of the air duct 111. In this embodiment, since the distance between the inlet 113 and the outlet 114 of the air duct 111 is far, after the air flow enters the air duct 111 from the inlet 113, it needs to pass through a relatively long path to reach the outlet 114, so that the air flow noise can be fully reduced in the air duct 111, thereby making the air duct structure 110 have a better vibration and noise reduction effect.

[0105] Furthermore, in some alternative embodiments of the present invention, the apertures of the inlet 113 and the outlet 114 of the air duct 111 can be equal or not equal.

[0106] In some alternative embodiments of the present invention, the inlet 113 and the outlet 114 of the air duct 111 are respectively arranged at the opposite ends of the air duct 111. For example, the inlet 113 and the outlet 114 of the air duct 111 are respectively arranged at the two ends in the horizontal direction of the air duct 111; or, the inlet 113 and the outlet 114 of the air duct 111 are respectively arranged at the two ends in the vertical direction of the air duct 111.

[0107] In some alternative embodiments of the present invention, there is a certain gap between the outermost fin 112 among the multiple fins and the peripheral wall of the air duct 111 to form an air flow channel. In this embodiment, through the above arrangement, the vibration isolation and sound insulation performance of the air duct structure 110 can be further improved, so that the air duct structure 110 has better vibration reduction and noise reduction performance, and further enables the refrigeration and freezing device to have better sound quality, so as to further improve the user experience. Preferably, the cross-section of the air duct 111 is rectangular, and the inlet 113 and the outlet 114 of the air duct 111 are respectively arranged at the diagonal corners of the air duct 111, which can extend the flow path of the air flow, so that the air duct structure 110 has better vibration reduction and noise reduction performance. More preferably, the apertures of the inlet 113 and the outlet 114 of the air duct 111 are equal.

[0108] In some alternative embodiments of the present invention, the air duct structure 110 is a non-uniform plate-fin air duct structure.

[0109] In some alternative embodiments of the present invention, the fin 112 is a strip fin. In some alternative embodiments of the present invention, the fin 112 can also be a triangular, circular or rectangular fin, etc. In this embodiment, using the strip fin 112 is more convenient for the design or assembly of the air duct structure 110.

[0110] An embodiment of the present invention also provides a refrigeration and freezing device 100, as Figure 6 shown, the refrigeration and freezing device 100 includes a box body 120, and the air duct structure 110 as described in any one of the above is provided in the box body 120. Compared with the existing uniform air duct structure, the present invention reduces the number of fins used and does not reduce the vibration reduction and noise reduction performance of the air duct structure, thereby saving the use cost of the refrigeration and freezing device.

[0111] In some alternative embodiments of the present invention, the refrigeration and freezing device 100 is a refrigerator. Preferably, the refrigerator is an A-level silent refrigerator.

[0112] In some other alternative embodiments of the present invention, the refrigeration and freezing device 100 is a freezer.

[0113] So far, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, still, without departing from the spirit and scope of the present invention, many other variations or modifications that conform to the principles of the present invention can be directly determined or derived based on the content disclosed in the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. A design method for an air duct structure, characterized in that, Including: S100, obtaining the design domain of the air duct and obtaining the preset quantity and preset size of the fins; S200, obtaining the target vibration and noise reduction performance; S300, establishing a non-uniform fin layout optimization model at least according to the target vibration and noise reduction performance, the design domain, the preset quantity and the preset size, and giving an optimization formulation; S400, solving the optimization formulation to obtain the optimal solution of the fin distribution.

2. The design method according to claim 1, wherein the preset size includes at least one of a preset length, a preset width, and a preset height.

3. The design method according to claim 1, wherein the optimization formulation includes design variables, an objective function, and constraint conditions; the design variables are the position coordinates of each fin; the objective function is the simulated vibration and noise reduction performance based on the design variables; the constraint conditions at least include a non-overlapping constraint condition between adjacent fins and the position coordinate constraint condition.

4. The design method according to claim 3, wherein the position coordinates of each fin are the three-dimensional coordinates of the center position of each fin; the non-overlapping constraint condition between adjacent fins at least includes: where x i , y i and z i are the three-dimensional coordinates of the i-th fin; x i0 ,y i0 and z i0 is the three-dimensional coordinate of the fin adjacent to the i-th fin; d is a preset value.

5. The design method according to claim 4, wherein the preset size of the fin includes a preset length; the preset value is not less than the preset length.

6. The design method according to claim 1, wherein the solving of the optimization formulation includes: solving the optimization formulation based on an optimization algorithm of deep learning; and / or after step S400, it further includes: S500, obtaining the air duct structure based on the optimal solution of the fin distribution.

7. The design method according to claim 3, wherein step S400 includes: S401, setting optimization initial parameters, the optimization initial parameters at least including a maximum number of iterations and a convergence condition; S402, calculating the objective function value; S403, calculating the constraint conditions; S404, performing iterative calculation in a loop, and when the maximum number of iterations is reached or the convergence condition is satisfied, the loop ends, otherwise the loop continues; S405, the optimization ends, and the optimal solution of the fin distribution is obtained.

8. An air duct structure, characterized in that, The design model for manufacturing the air duct structure is at least obtained by the design method according to any one of claims 1 to 7 above; The air duct structure includes: an air duct; a plurality of fins, and the plurality of fins are non-uniformly distributed in the air duct.

9. The air duct structure according to claim 8, wherein the inlet and outlet of the air duct are respectively arranged at the diagonal corners of the air duct; and / or a gap is provided between the fin and the peripheral wall of the air duct to form an air flow channel; and / or the fin is a sound-absorbing material; and / or the fin is a strip fin.

10. A refrigerating and freezing device, characterized in that, Including a box body, and the air duct structure according to any one of claims 8-9 is arranged in the box body.

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