Refrigerator

Abstract

The refrigerator comprises a refrigerator body and a sound insulation plate, the refrigerator body is provided with a containing cavity and an opening communicating with the containing cavity, a compressor and / or a draught fan are / is arranged in the containing cavity, and the sound insulation plate covers the opening in a sealing mode; the sound insulation board comprises a board body and reinforcing ribs, the reinforcing ribs are arranged on the inner surface of the board body, and the reinforcing ribs are provided with acoustic black hole structures. The compressor and / or the fan are / is arranged in the containing cavity of the box body, the sound insulation plate covers the opening communicated with the containing cavity in a sealing mode, the sound insulation plate comprises the plate body and the reinforcing ribs arranged on the inner surface of the plate body, the reinforcing ribs are provided with the acoustic black hole structures, and the sound insulation effect is improved based on the acoustic black hole effect. The acoustic black hole structure can greatly eliminate low-frequency and discrete variable noise of the compressor and / or the fan, so that the low-frequency and discrete variable noise of the compressor and / or the fan is effectively reduced.

Description

Technical Field

[0001] This application belongs to the field of refrigerator technology, and in particular relates to a refrigerator. Background Technology

[0002] The noise from a refrigerator mainly originates from the compressor and fan, which generate low-frequency, discrete, and variable noise. Existing technologies typically employ porous and resonant materials for noise reduction. Porous materials are effective at reducing high-frequency noise, but struggle to effectively reduce low-frequency, discrete, and variable noise. Resonant materials are effective at reducing noise near its natural frequency, but are also less effective at reducing discrete, variable noise. Utility Model Content

[0003] This application provides a refrigerator to solve the problem that the prior art has difficulty in effectively reducing the low-frequency, discrete, and variable noise of refrigerators.

[0004] This application provides a refrigerator, which includes a cabinet and a sound insulation panel. The cabinet has a accommodating cavity and an opening communicating with the accommodating cavity. A compressor and / or a fan are provided in the accommodating cavity. The sound insulation panel covers the opening. The sound insulation panel includes a plate and a reinforcing rib. The reinforcing rib is disposed on the inner surface of the plate and has an acoustic black hole structure.

[0005] Optionally, the acoustic black hole structure has a curved surface, and the boundary curve equation of the curved surface is y(x) = ε·x m +h; where h is the minimum distance between the outer and inner surfaces of the acoustic black hole structure along the thickness direction of the reinforcing rib, ε is an adjustment parameter, and m≥2.

[0006] Optionally, the sound insulation panel further includes a damping element disposed on the inner surface of the portion with the smallest thickness in the acoustic black hole structure.

[0007] Optionally, the thickness of the damping element is 0.15mm to 0.25mm.

[0008] Optionally, the material of the damping element includes water-based high-elasticity damping adhesive, rubber, silicone, or fluoropolymer.

[0009] Optionally, the acoustic black hole structure extends along the length direction of the reinforcing rib; or, the reinforcing rib is provided with multiple acoustic black hole structures at intervals along its own length direction.

[0010] Optionally, the sound insulation panel includes a plurality of reinforcing ribs, which are arranged in pairs, intersecting and / or parallel.

[0011] Optionally, the plate and the reinforcing rib are integrally formed.

[0012] Optionally, the reinforcing rib includes two acoustic black hole structures arranged side by side and fitted together, and the two acoustic black hole structures are symmetrically arranged.

[0013] Optionally, the ends of the two acoustic black hole structures with the smallest thickness of the reinforcing rib are attached together; or, the ends of the two acoustic black hole structures with the largest thickness of the reinforcing rib are attached together.

[0014] The refrigerator provided in this application embodiment has a compressor and / or fan installed inside the cabinet cavity, and a sound insulation panel is sealed at the opening communicating with the cabinet cavity. The sound insulation panel includes a panel body and reinforcing ribs disposed on the inner surface of the panel body. The reinforcing ribs have an acoustic black hole structure. Based on the acoustic black hole effect, the acoustic black hole structure can significantly eliminate the low-frequency, discrete, variable noise of the compressor and / or fan, thereby achieving effective noise reduction of the low-frequency, discrete, variable noise of the compressor and / or fan. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. Those skilled in the art can obtain other drawings based on these drawings without creative effort. In the following description, the same reference numerals denote the same parts.

[0016] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of this application.

[0017] Figure 2 for Figure 1 The diagram shows the structure of the sound insulation panel in the refrigerator.

[0018] Figure 3 for Figure 2 The front view of the sound insulation panel is shown.

[0019] Figure 4 for Figure 1 and Figure 3 The diagram shows a partial structural schematic of the sound insulation panel.

[0020] Figure 5 for Figure 4 The diagram shows the acoustic black hole structure in the sound insulation panel.

[0021] Figure 6 A schematic diagram of the finite element simulation results of the sound pressure level provided in this application.

[0022] Explanation of icon numbers:

[0023] 100. Enclosure; 101. Receptacle; 102. Opening; 200. Sound insulation panel; 210. Panel; 220. Reinforcing rib; 221. Acoustic black hole structure; 2211. Curved surface; 230. Damping component; 300. Compressor; 400. Fan. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] This application provides a refrigerator, such as... Figures 1-5As shown, the refrigerator includes a cabinet 100 and a sound insulation panel 200. The cabinet 100 has a receiving cavity 101 and an opening 102 communicating with the receiving cavity 101. A compressor 300 and / or a fan 400 are installed inside the receiving cavity 101. The sound insulation panel 200 covers the opening 102. The sound insulation panel 200 includes a plate 210 and a reinforcing rib 220. The reinforcing rib 220 is disposed on the inner surface of the plate 210 and has an acoustic black hole structure 221. Here, "the inner surface of the plate 210" refers to the side of the plate 210 facing the inside of the receiving cavity 101 when the sound insulation panel 200 covers the opening 102.

[0028] The refrigerator provided in this application embodiment arranges the compressor 300 and / or fan 400 in the accommodating cavity 101 of the cabinet 100, and seals the opening 102 communicating with the accommodating cavity 101 with a sound insulation plate 200. The sound insulation plate 200 includes a plate body 210 and a reinforcing rib 220 disposed on the inner surface of the plate body 210. The reinforcing rib 220 has an acoustic black hole structure 221. Based on the acoustic black hole effect, the acoustic black hole structure 221 can significantly eliminate the low-frequency, discrete and variable noise of the compressor 300 and / or fan 400, thereby achieving effective noise reduction of the low-frequency, discrete and variable noise of the compressor 300 and / or fan 400.

[0029] Furthermore, the sound insulation panel 200 also isolates the components inside the accommodating cavity 101 (such as the compressor 300 and the fan 400) from the external environment, thus protecting the components. By providing reinforcing ribs 220 on the panel 210 of the sound insulation panel 200, the structural strength of the panel 210 can be improved, making it less prone to breakage. Optionally, the sound insulation panel 200 can be installed on the enclosure 100 by screw fastening.

[0030] Specifically, such as Figure 5 As shown, the acoustic black hole structure 221 has a curved surface 2211, and the boundary curve equation of the curved surface 2211 is y(x)=ε·x m +h; where h is the minimum distance between the outer and inner surfaces of the acoustic black hole structure 221 along the thickness direction of the reinforcing rib 220, ε is an adjustment parameter, and m≥2. For example, h can be set to 0.05mm, ε to 0.01, and m to 2.

[0031] Understandably, according to the theory of elasticity, the propagation speed of elastic waves (such as sound waves and vibration waves) in a structure is related to the thickness of the structure. In the acoustic black hole structure 221, as the thickness gradually decreases, the propagation speed of the elastic waves also gradually decreases. When the wave propagates to a region where the thickness approaches zero, the wave speed also approaches zero. This gradual decrease in wave speed causes the wave to be continuously compressed during propagation, and the energy gradually accumulates at the end of the acoustic black hole. In other words, the acoustic black hole structure 221 can guide the elastic waves to gradually decrease in speed as they propagate within it, eventually "capturing" them, thereby achieving the purpose of vibration reduction and noise reduction.

[0032] In some embodiments of this application, such as Figure 4 As shown, the sound insulation panel 200 also includes a damping element 230, which is disposed on the inner surface of the thinnest part of the acoustic black hole structure 221. For example, the damping element 230 can be adhered to the inner surface of the thinnest part of the acoustic black hole structure 221. By providing the damping element 230, this application can convert the energy accumulated in the acoustic black hole structure 221 into heat energy and dissipate it, thereby achieving efficient energy absorption and further improving the noise reduction effect.

[0033] Optionally, the material of the damping element 230 may include water-based high-elasticity damping adhesive, rubber, silicone, or fluoropolymer.

[0034] Optionally, the thickness of the damping element 230 is 0.15mm to 0.25mm. For example, the thickness of the damping element 230 can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, or 0.25mm, etc., and can be set according to actual needs.

[0035] In some embodiments of this application, the acoustic black hole structure 221 extends along the length of the reinforcing rib 220; or, the reinforcing rib 220 is provided with multiple acoustic black hole structures 221 at intervals along its own length. Both of these solutions can more effectively eliminate noise and further improve the noise reduction effect.

[0036] Optional, such as Figure 2 and Figure 3 As shown, the sound insulation panel 200 includes multiple reinforcing ribs 220, which are arranged in pairs, intersecting and / or parallel. That is, the multiple reinforcing ribs 220 can be arranged in pairs, or in parallel; or, some of the reinforcing ribs 220 can be arranged in pairs, while others can be arranged in parallel (e.g., ...). Figure 2 and Figure 3 As shown in the figure, the specific settings can be made according to the bending stiffness and torsional stiffness requirements of the sound insulation board 200.

[0037] Optionally, the plate 210 and the reinforcing rib 220 are integrally formed. By adopting an integrated design, the plate 210 and the reinforcing rib 220 can be formed in one step during production, which is convenient for processing and helps to improve production efficiency.

[0038] In some embodiments of this application, such as Figure 4 As shown, the reinforcing rib 220 includes two acoustic black hole structures 221 arranged side-by-side and closely fitted, and the two acoustic black hole structures 221 are symmetrically arranged. By designing the reinforcing rib 220 with the above-described structure, this application can more effectively eliminate noise and further improve the noise reduction effect.

[0039] Optionally, the two ends of the acoustic black hole structures 221 with the smallest thickness of the reinforcing rib 220 are attached together (e.g., Figure 4 (as shown); or, the thickest ends of the two acoustic black hole structures 221 of the reinforcing rib 220 are attached together.

[0040] like Figure 5 As shown, in a specific embodiment of this application, the minimum distance h between the outer surface and the inner surface of the acoustic black hole structure 221 along the thickness direction Y of the reinforcing rib 220 is 1 mm, the maximum distance h1 between the outer surface and the inner surface of the acoustic black hole structure 221 along the thickness direction Y of the reinforcing rib 220 is 1 mm, the bottom edge length d1 of the acoustic black hole structure 221 is 3.4 mm, the top edge length d2 of the acoustic black hole structure 221 is 0.84 mm, and the projection length of the damping member 230 on the bottom edge of the acoustic black hole structure 221 is 1.6 mm.

[0041] The inventors of this application conducted a finite element simulation of the sound pressure level at a point 5 cm outside the sound insulation panel 200 mm in the direction of the refrigerator fan noise (400 rpm). Figure 6 As shown, simulation results indicate that the sound insulation panel 200 of this application can reduce the noise of the fan 400 in almost the entire frequency range of 100Hz to 5000Hz. Compared with a flat plate without reinforcing ribs 220, the sound insulation panel 200 of this application reduces the noise by an average of more than 3dB in the low frequency range below 1000Hz, which can significantly reduce the low-frequency discrete and variable noise of the fan 400 in the refrigerator.

[0042] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0043] The refrigerator provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A refrigerator characterized by comprising: The sound insulation board (200) further comprises a damping member (230) arranged on the inner surface of the part with the minimum thickness in the acoustic black hole structure (221).

2. The refrigerator according to claim 1, characterized in that, The acoustic black hole structure (221) has a curved surface (2211), and a boundary curve equation of the curved surface (2211) is y(x) = epsilon*x m +h; wherein h is a minimum distance between an outer surface and an inner surface of the acoustic black hole structure (221) in a thickness direction of the reinforcing rib (220), epsilon is an adjustment parameter, and m >= 2.

3. The refrigerator according to claim 1, characterized in that, The thickness of the damping member (230) is 0.15mm-0.25mm.

4. The refrigerator according to claim 3, characterized in that, The material of the damping member (230) comprises water-based high-elastic damping glue, rubber, silica gel or fluorine glue.

5. The refrigerator according to claim 3, characterized in that, The acoustic black hole structure (221) extends along the length direction of the reinforcing rib (220); or, the reinforcing rib (220) is provided with multiple acoustic black hole structures (221) at intervals along the length direction of the reinforcing rib (220).

6. The refrigerator according to claim 1, characterized in that, The sound insulation board (200) comprises multiple reinforcing ribs (220), and the multiple reinforcing ribs (220) are arranged in cross and / or parallel.

7. The refrigerator according to claim 1, characterized in that, The reinforcing rib (220) comprises two acoustic black hole structures (221) arranged side by side and in close contact, and the two acoustic black hole structures (221) are symmetrically arranged.

8. The refrigerator according to claim 1, characterized in that, The minimum-thickness end of the two acoustic black hole structures (221) of the reinforcing rib (220) is in close contact; or, the maximum-thickness end of the two acoustic black hole structures (221) of the reinforcing rib (220) is in close contact.

9. The refrigerator according to any one of claims 1 to 8, characterized in that ​ 10. The refrigerator according to claim 8, characterized in that, ​

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