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 air duct structure comprises an air duct and a plurality of fins, and the fins are distributed in the air duct in a rectangular array mode and used for reducing vibration and noise of airflow noise in the air duct. According to the refrigerating and freezing device, the fins in the rectangular array form the combined noise reduction mechanism, so that the airflow noise can be remarkably reduced, the technical problem that in the prior art, the noise in an air channel is large is solved, the sound quality of the refrigerating and freezing device is improved, and the purpose of improving the user experience is achieved. The design method has the beneficial effects of being scientific, reasonable, simple and easy to operate; the air duct structure manufactured through the design method can meet the requirement for target vibration and noise reduction performance.

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. However, the existing air duct structure design of the refrigerator is unreasonable, resulting in a large air flow noise in the air duct, and further leading to a degradation of the user experience. 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 large air flow noise in the air duct of the existing refrigerator and achieve the purpose of improving the user experience.

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

[0005] An air duct;

[0006] A plurality of fins, which are distributed in the air duct in a rectangular array and are used for reducing the vibration and noise of the air flow noise in the air duct.

[0007] Optionally, the fins extend longitudinally or transversely along the air duct; and / or

[0008] The number of rows and columns of the plurality of fins are equal or not equal.

[0009] Optionally, the inlet and outlet of the air duct are respectively arranged at the diagonal corners of the air duct; and / or

[0010] There is a gap between the fins and the peripheral wall of the air duct to form an air flow channel; and / or

[0011] The fins are made of sound-absorbing materials; and / or

[0012] The fins are strip-shaped fins.

[0013] On the other hand, the present invention also provides a setting method of the air duct structure; the design model of the air duct structure includes an air duct and a plurality of fins distributed in the air duct in a rectangular array;

[0014] The design method includes:

[0015] Step S100, obtaining the design domain and / or the target vibration and noise reduction performance of the target air duct;

[0016] Step S200: Obtain the preset number of rows and preset number of columns of the fins in the target air duct;

[0017] Step S300: Establish a uniform fin layout optimization model based on at least the design domain, the preset number of rows and / or the preset number of columns, and / or the target vibration and noise reduction performance, and give an optimization formula;

[0018] Step S400: Solve the optimization formula to obtain the optimal solutions for the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins.

[0019] Optionally, the solving of the optimization formula includes: solving the optimization formula based on an optimization algorithm of deep learning; and / or

[0020] After step S400, it further includes: Step S500: Based on the design domain of the target air duct, the optimal solutions for the length and / or width of the fins, and the optimal solutions for the lateral spacing and the longitudinal spacing between adjacent fins, obtain the shape and distribution of the fins.

[0021] Optionally, the optimization formula includes design variables, an objective function, and constraint conditions;

[0022] The design variables include the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins;

[0023] The objective function is the vibration and noise reduction performance of the design model;

[0024] The constraint conditions include that the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins meet the dimensional conditions of the design domain.

[0025] Optionally, the fins extend longitudinally along the air duct, and at least the following is included in the constraint conditions: the product of the length of the fins and the preset number of rows is less than the square root of half of the length of the design domain; or

[0026] The fins extend laterally along the air duct, and at least the following is included in the constraint conditions: the product of the length of the fins and the preset number of columns is less than the square root of half of the width of the design domain.

[0027] Optionally, the fins extend longitudinally along the air duct;

[0028] The constraint conditions include:

[0029] M1L < N1 1 / 2 ; and / or, M2W < N2 1 / 2 ;

[0030]

[0031] Y i min ≤Y i ≤Y i max ;

[0032] L min ≤L≤L max ; and / or, W min ≤W≤W max ;

[0033] Wherein, L is the length of the fin; W is the width of the fin; M1 is the preset number of rows; M2 is the preset number of columns; N1 is the length of the design domain; N2 is the width of the design domain; X i is the horizontal spacing between adjacent fins; Y i is the vertical spacing between adjacent fins; is the minimum preset horizontal spacing between adjacent fins; is the maximum preset horizontal spacing between adjacent fins; Y i min is the minimum preset vertical spacing between adjacent fins; Y i max is the maximum preset vertical spacing between adjacent fins; L min is the minimum preset length of the fin; L max is the maximum preset length of the fin; W min is the minimum preset width of the fin; W max is the maximum preset width of the fin.

[0034] Optionally, the step S400 includes:

[0035] Step S401, setting the initial values of the length and / or width, horizontal spacing and vertical spacing of the fin;

[0036] Step S402, setting the optimization initial parameters, where the optimization initial parameters at least include the maximum number of iterations and the convergence condition;

[0037] Step S403, calculating the objective function value;

[0038] Step S404, calculating the constraint conditions;

[0039] Step S405, performing iterative calculation in a loop. When the maximum number of iterations is reached or the convergence condition is satisfied, the loop ends; otherwise, the loop continues;

[0040] Step S406, the optimization ends, and the optimal solutions of the length and / or width of the fin, the horizontal spacing and the vertical spacing between adjacent fins are obtained.

[0041] On the other hand, the present invention also provides a refrigerating and freezing device, comprising:

[0042] A box body, in which a duct structure as described in any one of the above is provided, and the design model for manufacturing the duct structure is obtained by at least the design method described in any one of the above.

[0043] In the refrigerating and freezing device and the duct structure of the present invention, during the operation of the refrigerating and freezing device, when the airflow noise enters the duct, the fins in the duct can isolate and reduce the vibration and noise of the airflow, and a plurality of fins arranged in a rectangular array constitute a combined noise reduction mechanism, which can significantly reduce the airflow noise, thereby solving the technical problem of large noise in the duct in the prior art, improving the sound quality of the refrigerating and freezing device, and achieving the purpose of improving the user experience.

[0044] The design method of the present invention has the beneficial effects of being scientific, reasonable, simple and easy to operate; the duct structure manufactured by using the design method of the present invention can meet the requirements of the target vibration and noise reduction performance.

[0045] From the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will become more clear about the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary and non-limiting 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:

[0047] Figure 1 is a schematic structural diagram of a duct structure in an embodiment of the present invention;

[0048] Figure 2 is a schematic structural diagram of a duct structure in an embodiment of the present invention;

[0049] Figure 3 is a schematic flow chart of a design method of a duct structure in an embodiment of the present invention;

[0050] Figure 4 is a schematic flow chart of a design method of a duct structure in an embodiment of the present invention;

[0051] Figure 5 is a schematic flow chart of a design method of a duct structure in an embodiment of the present invention;

[0052] Figure 6 is a schematic flow chart of a design method of a duct structure in an embodiment of the present invention;

[0053] Figure 7It is a schematic structural diagram of a refrigeration and freezing device in an embodiment of the present invention. Specific embodiments

[0054] The following will refer to Figures 1 to 7 to describe the refrigeration and freezing device, the air duct structure and the design method of the air duct structure in the embodiments 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 understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the 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 of" 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.

[0055] Unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, 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 situations.

[0056] 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 other 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 is at a higher horizontal height than the second feature. The first feature being "under", "beneath" or "under" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal height than the second feature.

[0057] In the description of this embodiment, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean 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 expressions 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.

[0058] In order to suppress the noise of the refrigerator fan duct system and further improve the noise reduction performance of the refrigerator, according to the actual reserved area of the duct, uniform strip fins are reasonably designed to form a plate-fin duct structure with a uniform strip fin array. By determining the relevant structural parameters such as the number of uniform strip fins in the plate-fin duct structure, the size of each strip fin, and the lateral and longitudinal spacings between adjacent strip fins, the plate-fin duct structure has a good noise reduction effect.

[0059] Figure 1 is a schematic structural diagram of the duct structure 110, as Figure 1 shown, and with reference to Figure 2 , an embodiment of the present invention provides a duct structure 110, including a duct 111 and a plurality of fins 112. The plurality of fins 112 are distributed in a rectangular array within the duct 111 and are used to reduce the vibration and noise of the air flow noise within the duct 111.

[0060] Specifically, the gaps between any two adjacent fins 112 in the transverse direction of the duct 111 form a first sound absorption cavity 113, and the gaps between any two adjacent fins 112 in the longitudinal direction of the duct 111 form a second sound absorption cavity 114. There are a plurality of first sound absorption cavities 113 and a plurality of second sound absorption cavities 114 within the duct 111, and all the sound absorption cavities are interconnected with each other, thereby forming a combined noise reduction structure inside the duct 111.

[0061] In this embodiment, during the operation of the refrigerator, when the air flow noise enters the duct 111, the fins 112 within the duct 111 can isolate and damp the air flow noise, and the plurality of fins 112 arranged in a rectangular array constitute a combined noise reduction mechanism, which can significantly reduce the air flow noise, thereby solving the technical problem of high noise inside the duct 111 in the prior art, improving the sound quality of the refrigerator, and achieving the purpose of improving the user experience.

[0062] In some alternative embodiments of the present invention, the fins 112 are strip fins. In some alternative embodiments of the present invention, the fins 112 can also be triangular or circular fins or rectangular fins, etc. In this embodiment, using strip fins 112 is more convenient for the design or assembly of the duct structure 110.

[0063] 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 ABS material, sound-absorbing metamaterial, organic fiber sound-absorbing material, metal sound-absorbing plate, 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 has a complex maze pattern structure on it. 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.

[0064] In some alternative embodiments of the present invention, the fin 112 extends longitudinally along the air duct 111, that is to say, the length direction of the fin 112 corresponds to the longitudinal direction of the air duct 111; preferably, the fin 112 is a strip fin 112. In some alternative embodiments of the present invention, the fin 112 extends transversely along the air duct 111, that is to say, the length direction of the fin 112 corresponds to the transverse direction of the air duct 111; preferably, the fin 112 is a strip fin 112.

[0065] In the rectangular array, the number of rows and columns of the fins 112 can be set as needed. In some alternative embodiments of the present invention, the number of rows and columns of the fins 112 is equal. Preferably, in the rectangular array, the number of rows and columns of the fins 112 can be any value from 2 to 20. More preferably, the number of rows and columns of the fins 112 is both 6. In this embodiment, setting the number of rows and columns of the fins 112 to equal values is more convenient for the design and installation of the air duct structure 110.

[0066] In some other alternative embodiments of the present invention, the number of rows and columns of the fins 112 is not equal. Preferably, the number of rows of the fins 112 can be any value from 2 to 20, the number of columns of the fins 112 can be any value from 2 to 20, and the number of rows and columns is not equal. For example, the number of rows is 6 and the number of columns is 4; or, the number of rows is 3 and the number of columns is 8.

[0067] In some alternative embodiments of the present invention, the inlet 116 and the outlet 117 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 116 and the outlet 117 of the air duct 111 is far, after the air flow enters the air duct 111 from the inlet 116, it needs to pass through a relatively long path to reach the outlet 117, 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.

[0068] Further, in some alternative embodiments of the present invention, the apertures of the inlet 116 and the outlet 117 of the air duct 111 may be equal or unequal. For example: in some embodiments, the aperture of the inlet 116 of the air duct 111 is a first preset value, and the aperture of the outlet 117 of the air duct 111 is a first set value; in other embodiments, the aperture of the inlet 116 of the air duct 111 is a second preset value, and the aperture of the outlet 117 of the air duct 111 is a second set value; the second preset value is less than the first preset value, and the second set value is less than the first set value. The inlet 116 and the outlet 117 with small apertures can enable the air duct structure 110 to have a better noise reduction and vibration damping effect.

[0069] In some alternative embodiments of the present invention, the inlet 116 and the outlet 117 of the air duct 111 are respectively arranged at opposite ends of the air duct 111. For example, the inlet 116 and the outlet 117 of the air duct 111 are respectively arranged at the two transverse ends of the air duct 111; or, the inlet 116 and the outlet 117 of the air duct 111 are respectively arranged at the two longitudinal ends of the air duct 111.

[0070] In some alternative embodiments of the present invention, there is a certain gap between the fin 112 and the peripheral wall 1111 of the air duct 111 to form an air flow channel 115. That is to say, there is a gap between the rectangular array and the peripheral wall 1111 of the air duct 111. In this embodiment, through the above settings, 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 damping 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 116 and the outlet 117 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 damping and noise reduction performance. More preferably, the apertures of the inlet 116 and the outlet 117 of the air duct 111 are equal, the outer ends of the first row of fins 112 in the rectangular array do not exceed the inlet 116 of the air duct 111, and the outer ends of the last row of fins 112 in the rectangular array do not exceed the outlet 117 of the air duct 111, which can further reduce the air flow noise. Further preferably, the gaps between the rectangular array and the four inner walls of the air duct 111 are equal, which is more convenient for the design and manufacture of the air duct 111.

[0071] In some alternative embodiments of the present invention, the air duct structure 110 is a plate-fin type air duct structure 110.

[0072] In some alternative embodiments of the present invention, the air duct 111 can be used for 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.

[0073] On the other hand, an embodiment of the present invention further provides a design method for an air duct structure 110, as Figures 1 to 2 shown, the design model of the air duct structure 110 includes an air duct 111 and a plurality of fins 112 distributed in the air duct 111 in a rectangular array.

[0074] As Figure 3 shown, the design method for the air duct structure 110 includes:

[0075] Step S100, obtaining the design domain of the target air duct;

[0076] Step S200, obtaining the preset number of rows and the preset number of columns of the fins 112 in the target air duct;

[0077] Step S300, establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain, the preset number of rows and / or the preset number of columns, and / or the target vibration reduction and noise reduction performance;

[0078] Step S400, solving the optimization formula to obtain the optimal solutions of the length and / or width of the fins 112, and the lateral and longitudinal spacings between adjacent fins 112.

[0079] Specifically, the design domain of the target air duct in step S100 refers to the available area of the target air duct. Step S300 includes at least the following situations: ① Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain, the preset number of rows and the preset number of columns; ② Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain and the preset number of rows; ③ Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain and the preset number of columns; ④ Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain, the preset number of rows, the preset number of columns, and the target vibration reduction and noise reduction performance; ⑤ Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain, the preset number of rows, and the target vibration reduction and noise reduction performance; ⑥ Establishing a uniform fin 112 layout optimization model and giving an optimization formula at least according to the design domain, the preset number of columns, and the target vibration reduction and noise reduction performance. Step S400 includes at least the following situations: ① Solving the optimization formula to obtain the optimal solutions of the length and width of the fins 112, and the lateral and longitudinal spacings between adjacent fins 112. ② Solving the optimization formula to obtain the optimal solutions of the length of the fins 112, and the lateral and longitudinal spacings between adjacent fins 112. ③ Solving the optimization formula to obtain the optimal solutions of the width of the fins 112, and the lateral and longitudinal spacings between adjacent fins 112. Wherein, the lateral and longitudinal spacings between adjacent fins 112 are the column spacing and the row spacing of the rectangular array respectively.

[0080] This embodiment provides a design method for a plate-fin air duct structure 110. This design method is at least based on the design domain of the target air duct, the preset number of rows and / or columns of the fins 112, and / or the target vibration and noise reduction performance, to establish an optimization model for the layout of the uniform fins 112. By solving the optimization formula, the optimal solutions for the length and / or width of the fins 112, the lateral spacing and the longitudinal spacing between adjacent fins 112 can be obtained. Since the lateral spacing and the longitudinal spacing between adjacent fins 112, and the length and width of the fins 112 are all sensitive parameters affecting the vibration and noise reduction effect of the air duct structure 110. Therefore, the above design method can be used to quickly design a uniform air duct structure 110, while enabling the air duct structure 110 to have good vibration and noise reduction performance and meet the requirements of the target vibration and noise reduction performance, so as to meet the improvement of the sound quality of the refrigerator, and further achieve the purpose of improving the user experience.

[0081] Furthermore, the design method of this embodiment is specifically an optimization design method for the layout of the uniform strip fins 112 of the plate-fin air duct 111, and can be applied to noise suppression in different types of refrigerator fan air duct 111 systems.

[0082] Furthermore, the design model obtained by this embodiment can be used to manufacture the air duct structure 110 of any of the above embodiments.

[0083] In some alternative embodiments of the present invention, as Figure 4 shown, after step S400, the design method of the air duct structure 110 further includes: step S500, based on the design domain of the target air duct, the optimal solutions for the length and / or width of the fins 112, and the lateral spacing and the longitudinal spacing between adjacent fins 112, to obtain the shape and distribution of the fins 112.

[0084] In some alternative embodiments of the present invention, in step S400, the solving of 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, and it 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.

[0085] In some alternative embodiments of the present invention, the optimization column type includes design variables, an objective function, and constraint conditions; the design variables include the length and / or width of the fin 112, the lateral spacing, and the longitudinal spacing; the objective function is the vibration and noise reduction performance of the design model; the constraint conditions include that the length and / or width of the fin 112, the lateral spacing, and the longitudinal spacing meet preset conditions. Specifically, the vibration and noise reduction performance can be characterized by the transmission loss, and the greater the transmission loss, the better the vibration and noise reduction effect; alternatively, the vibration and noise reduction performance can be characterized by the noise value of the air duct structure 110, and the smaller the noise value, the better the vibration and noise reduction performance.

[0086] In some alternative embodiments of the present invention, the fin 112 extends longitudinally along the air duct 111. In some other alternative embodiments of the present invention, the fin 112 extends laterally along the air duct 111.

[0087] In some alternative embodiments of the present invention, when the fin 112 extends longitudinally along the air duct 111, the constraint conditions at least include: the product of the length of the fin 112 and the preset number of rows is less than the square root of half of the length of the design domain. In some other alternative embodiments of the present invention, when the fin 112 extends laterally along the air duct 111, the constraint conditions at least include: the product of the length of the fin 112 and the preset number of columns is less than the square root of half of the width of the design domain.

[0088] In some alternative embodiments of the present invention, the fin 112 extends longitudinally along the air duct 111, that is, the length direction of the fin 112 corresponds to the longitudinal direction of the air duct 111.

[0089] The design variables include: the lateral spacing between adjacent fins 112, the longitudinal spacing between adjacent fins 112, the length of the fin 112, and the width of the fin 112.

[0090] The objective function is: min: Φ = f(X i , Y i , L, W);

[0091] The constraint conditions include:

[0092] M1L < N1 1 / 2 ;

[0093] M2W < N2 1 / 2 ;

[0094]

[0095] Y i min ≤ Y i ≤ Y i max ;

[0096] L min ≤ L ≤ Lmax ;

[0097] W min ≤W≤W max ;

[0098] where Φ is the vibration and noise reduction performance of the design model corresponding to X i , Y i , L, and W; L is the length of the fin 112; W is the width of the fin 112; M1 is the preset number of rows; M2 is the preset number of columns; N1 is the length of the design domain; N2 is the width of the design domain; X i is the lateral spacing between adjacent fins 112; Y i is the longitudinal spacing between adjacent fins 112; is the minimum preset lateral spacing between adjacent fins 112; is the maximum preset lateral spacing between adjacent fins 112; Y i min is the minimum preset longitudinal spacing between adjacent fins 112; Y i max is the maximum preset longitudinal spacing between adjacent fins 112; L min is the minimum preset length of the fin 112; L max is the maximum preset length of the fin 112; W min is the minimum preset width of the fin 112; W max is the maximum preset width of the fin 112.

[0099] In this embodiment, the preset number of columns and the preset number of rows of the fins 112 may be equal or unequal, and can be set as needed.

[0100] In some alternative embodiments of the present invention, the fins 112 extend longitudinally along the air duct 111, that is, the length direction of the fins 112 corresponds to the longitudinal direction of the air duct 111. The width of the fins 112 is a set width value.

[0101] The design variables include: the lateral spacing between adjacent fins 112, the longitudinal spacing between adjacent fins 112, and the length of the fins 112.

[0102] The objective function is: min: Φ = f(X i , Y i , L);

[0103] The constraint conditions include:

[0104] M1L < N1 1 / 2 ;

[0105]

[0106] Y i min ≤Y i ≤Y i max ;

[0107] L min ≤L≤L max 。

[0108] Wherein, Φ is the vibration and noise reduction performance of the design model corresponding to X i , Y i , L; L is the length of the fin 112; M1 is the preset number of rows; N1 is the length of the design domain; X i is the lateral spacing between adjacent fins 112; Y i is the longitudinal spacing between adjacent fins 112; is the minimum preset lateral spacing between adjacent fins 112; is the maximum preset lateral spacing between adjacent fins 112; Y i min is the minimum preset longitudinal spacing between adjacent fins 112; Y i max is the maximum preset longitudinal spacing between adjacent fins 112; L min is the minimum preset length of the fin 112; L max is the maximum preset length of the fin 112.

[0109] In some alternative embodiments of the present invention, the fin 112 extends longitudinally along the air duct 111, that is, the length direction of the fin 112 corresponds to the longitudinal direction of the air duct 111. The length of the fin 112 is a set length value.

[0110] The design variables include: the lateral spacing between adjacent fins 112, the longitudinal spacing between adjacent fins 112, and the width of the fin 112.

[0111] The objective function is: min: Φ = f(X i , Y i , W);

[0112] The constraint conditions include:

[0113] M2W < N2 1 / 2 ;

[0114]

[0115] Y i min ≤Y i ≤Y i max ;

[0116] Wmin ≤W≤W max ;

[0117] Wherein, Φ is the vibration and noise reduction performance of the design model corresponding to X i , Y i , W; W is the width of the fin 112; M2 is the preset number of columns; N2 is the width of the design domain; X i is the lateral spacing between adjacent fins 112; Y i is the longitudinal spacing between adjacent fins 112; is the minimum preset lateral spacing between adjacent fins 112; is the maximum preset lateral spacing between adjacent fins 112; Y i min is the minimum preset longitudinal spacing between adjacent fins 112; Y i max is the maximum preset longitudinal spacing between adjacent fins 112; W min is the minimum preset width of the fin 112; W max is the maximum preset width of the fin 112.

[0118] In some alternative embodiments of the present invention, as Figure 5 shown, step S400 may include the following steps:

[0119] Step S401, set the initial values of the length and / or width, lateral spacing and longitudinal spacing of the fin 112;

[0120] Step S402, set the optimization initial parameters, and the optimization initial parameters at least include the maximum number of iterations and the convergence condition;

[0121] Step S403, calculate the objective function value;

[0122] Step S404, calculate the constraint condition;

[0123] Step S405, perform iterative calculation in a loop. When the maximum number of iterations is reached or the convergence condition is satisfied, the loop ends; otherwise, continue the loop;

[0124] Step S406, the optimization ends, and the optimal solutions of the length and / or width, lateral spacing and longitudinal spacing of the fin 112 are obtained.

[0125] Specifically, the maximum number of iterations can be 600, 800 or 1000, etc., and 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 iterative calculation terminates. The maximum number of iterations and the convergence accuracy in the convergence condition are both set values.

[0126] 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. In this embodiment, after the optimization is completed, multiple objective function values are obtained, and the design variable value corresponding to the optimal objective function value or the objective function value closest to the target vibration and noise reduction performance is used as the optimal solution of the design variables.

[0127] In some alternative embodiments of the present invention, the design model of the air duct structure 110 includes an air duct 111 and a plurality of strip fins 112 distributed in the air duct 111 in a rectangular array. The number of rows and columns in the rectangular array is 6.

[0128] As Figure 6 shown, a design method of an air duct structure 110 includes the following steps:

[0129] Step S1, obtain the length and width of the design domain of the target air duct;

[0130] Step S2, obtain the preset number of rows of the fins 112 in the target air duct;

[0131] Step S3, establish a uniform fin 112 layout optimization model and give an optimization formula:

[0132]

[0133] where Φ is the vibration and noise reduction performance of the design model corresponding to X i , Y i , L; L is the length of the fin 112; the preset number of rows of the fin 112 is 6; N1 is the length of the design domain; X i is the lateral spacing between adjacent fins 112; Y i is the longitudinal spacing between adjacent fins 112; is the minimum preset lateral spacing between adjacent fins 112; is the maximum preset lateral spacing between adjacent fins 112; Y i min is the minimum preset longitudinal spacing between adjacent fins 112; Y i max is the maximum preset longitudinal spacing between adjacent fins 112; L min is the minimum preset length of the fin 112; L max is the maximum preset length of the fin 112;

[0134] Step S4, set the initial length of each strip fin 112 to L0, and the lateral and longitudinal spacings to X0 and Y0 respectively;

[0135] Step S5, define the initial optimization parameters, including at least the maximum number of iterations and the convergence condition;

[0136] Step S6, calculate the objective function value;

[0137] Step S7, calculate the constraint conditions;

[0138] Step S8, perform iterative calculations. The loop ends when the maximum number of iterations is reached or the convergence condition is met; otherwise, continue the loop.

[0139] Step S9, the optimization ends, and the optimal solutions for the length of the fin 112, the lateral spacing, and the longitudinal spacing between adjacent fins 112 are obtained.

[0140] On the other hand, an embodiment of the present invention also provides a refrigerating and freezing device 100, as Figure 7 shown. The refrigerating and freezing device includes a box body 120, and the box body 120 is provided with an air duct structure 110 as described in any one of the above embodiments.

[0141] In this embodiment, since the air duct structure 110 of the refrigerating and freezing device 100 includes a plurality of fins 112 arranged in a rectangular array, the plurality of fins 112 arranged in a rectangular array 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 refrigerating and freezing device 100, and achieving the purpose of improving the user experience.

[0142] An embodiment of the present invention also provides a refrigerating and freezing device 100, as Figure 7 shown. The refrigerating and freezing device 100 includes a box body 120, and the box body 120 is provided with an air duct structure 110. The design model for manufacturing the air duct structure 110 is obtained at least by the design method described in any one of the above.

[0143] In this embodiment, since the air duct structure 110 of the refrigerating and freezing device 100 is obtained by the design method of the air duct structure 110, on the one hand, the plurality of fins 112 arranged in a rectangular array 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 refrigerating and freezing device 100, and achieving the purpose of improving the user experience. On the other hand, the air duct structure 110 can meet the target vibration and noise reduction performance, so as to meet the specific use requirements of users.

[0144] An embodiment of the present invention also provides a refrigerating and freezing device 100, as Figure 7 shown. The refrigerating and freezing device 100 includes a box body 120, and the box body 120 is provided with an air duct structure 110 as described in any one of the above embodiments. The design model for manufacturing the air duct structure 110 is obtained at least by the design method described in any one of the above.

[0145] In this embodiment, since the air duct structure 110 of the refrigeration and freezing device 100 is obtained by the above design method of the air duct structure 110, on the one hand, a plurality of fins 112 in a rectangular array form a combined noise reduction mechanism, which can significantly reduce the air flow noise, thus solving the technical problem of large noise in the air duct 111 in the prior art, improving the sound quality of the refrigeration and freezing device 100, and achieving the purpose of improving the user experience. On the other hand, the air duct structure 110 can meet the target vibration and noise reduction performance, so as to meet the specific use requirements of users.

[0146] In some alternative embodiments of the present invention, the refrigeration and freezing device 100 is a refrigerator. Preferably, the refrigerator is a Class A quiet refrigerator.

[0147] In some other alternative embodiments of the present invention, the refrigeration and freezing device 100 is a freezer.

[0148] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of 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. An air duct structure, characterized in that, Comprising: Air duct; A plurality of fins, which are distributed in a rectangular array in the air duct and are used for reducing vibration and noise of the air flow noise in the air duct.

2. The air duct structure according to claim 1, characterized in that The fins extend longitudinally or transversely along the air duct; and / or The number of rows and columns of the plurality of fins are equal or unequal.

3. The air duct structure according to claim 1, characterized in that The inlet and outlet of the air duct are respectively arranged at the diagonal corners of the air duct; and / or There is a gap between the fins and the peripheral wall of the air duct to form an air flow channel; and / or The fins are made of sound-absorbing material; and / or The fins are strip fins.

4. A design method for an air duct structure, characterized in that, The design model of the air duct structure includes an air duct and a plurality of fins distributed in a rectangular array in the air duct; The design method includes: Step S100, obtaining the design domain and / or the target vibration and noise reduction performance of the target air duct; Step S200, obtaining the preset number of rows and the preset number of columns of the fins in the target air duct; Step S300, establishing a uniform fin layout optimization model and giving an optimization formula at least according to the design domain, the preset number of rows and / or the preset number of columns, and / or the target vibration and noise reduction performance; Step S400, solving the optimization formula to obtain the optimal solutions of the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins.

5. The design method according to claim 4, characterized in that The solving of the optimization formula includes: solving the optimization formula based on an optimization algorithm of deep learning; and / or After step S400, it further includes: step S500, obtaining the shape and distribution of the fins based on the design domain of the target air duct, the optimal solutions of the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins.

6. The design method according to claim 4, characterized in that The optimization formula includes design variables, an objective function and constraint conditions; The design variables include the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins; The objective function is the vibration and noise reduction performance of the design model; The constraint conditions include that the length and / or width of the fins, the lateral spacing and the longitudinal spacing between adjacent fins satisfy the size conditions of the design domain.

7. The design method according to claim 6, characterized in that The fins extend longitudinally along the air duct, and at least include in the constraint conditions: the product of the length of the fins and the preset number of rows is less than the square root of half of the length of the design domain; or The fins extend transversely along the air duct, and at least include in the constraint conditions: the product of the length of the fins and the preset number of columns is less than the square root of half of the width of the design domain.

8. The design method according to claim 6, characterized in that The fins extend longitudinally along the air duct; The constraint conditions include: M1L < N1 1 / 2 ; and / or, M2W < N2 1 / 2 ; L min L ≤ L ≤ max ; and / or, W min W ≤ W ≤ max ; Wherein, L is the length of the fin; W is the width of the fin; M1 is the preset number of rows; M2 is the preset number of columns; N1 is the length of the design domain; N2 is the width of the design domain; X i is the horizontal spacing between adjacent fins; Y i is the vertical spacing between adjacent fins; is the minimum preset horizontal spacing between adjacent fins; is the maximum preset horizontal spacing between adjacent fins; Y i min is the minimum preset vertical spacing between adjacent fins; Y i max is the maximum preset vertical spacing between adjacent fins; L min is the minimum preset length of the fin; L max is the maximum preset length of the fin; W min is the minimum preset width of the fin; W max is the maximum preset width of the fin.

9. The design method according to claim 6, characterized in that The step S400 includes: Step S401, setting the initial values of the length and / or width of the fins, the lateral spacing and the longitudinal spacing. Step S402, set the initial optimization parameters, where the initial optimization parameters at least include the maximum number of iterations and the convergence condition; Step S403, calculate the objective function value; Step S404, calculate the constraint conditions; Step S405, perform iterative calculations in a loop. When the maximum number of iterations is reached or the convergence condition is met, the loop ends; otherwise, continue the loop; Step S406, the optimization ends, and the optimal solutions for the length and / or width of the fin, the lateral spacing and the longitudinal spacing between adjacent fins are obtained.

10. A refrigeration and freezing device, characterized in that, Comprising: A box body, wherein the box body is provided with the air duct structure as described in any one of claims 1-3, and the design model for manufacturing the air duct structure is at least obtained by the design method as described in any one of claims 4 to 9.

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