Noise reduction structure, compressor and refrigeration equipment

Abstract

The invention discloses a noise reduction structure, a compressor and refrigeration equipment, and the noise reduction structure comprises a bottom plate, a plurality of first enclosure cavity structures and a plurality of second enclosure cavity structures; the multiple first surrounding cavity structures are distributed on the surface, facing the sound source, of the bottom plate at intervals, the first surrounding cavity structures and the bottom plate are in airtight connection to form a first air cavity, and at least one wall face, forming the first air cavity, of the first surrounding cavity structures is a first vibration wall; the second enclosure cavity structure is arranged in at least one of the first enclosure cavity structures, the second enclosure cavity structure is in airtight connection with the bottom plate to form a second air cavity, and at least one wall surface, forming the second air cavity, of the second enclosure cavity structure is a second vibration wall. According to the technical scheme, the dual sound absorption and insulation effects are achieved, the frequency range capable of absorbing noise is widened, when the noise reduction structure is applied to the compressor, noise in the range from low frequency to intermediate frequency of the compressor can be effectively reduced, and the better noise reduction and sound insulation effects are achieved.

Description

Technical Field

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

[0002] In the related art, compressors are widely used in refrigeration equipment such as air conditioners and refrigerators. During the operation of the compressor, various internal components such as motors, pistons and internal airflow will generate electromagnetic noise, mechanical noise and aerodynamic noise. However, the existing sound insulation or sound absorption structure has a poor noise reduction effect on the compressor, resulting in poor user experience. Summary of the invention

[0003] The main purpose of the present invention is to propose a noise reduction structure, aiming to achieve better noise reduction and sound insulation effects on the compressor and enhance user experience.

[0004] To achieve the above object, the noise reduction structure proposed in the present invention includes:

[0005] Base plate;

[0006] a plurality of first cavity structures, spaced apart and distributed on the surface of the bottom plate facing the sound source, the first cavity structures being airtightly connected to the bottom plate to form a first air cavity, and at least one wall surface of the first cavity structure forming the first air cavity being a first vibration wall; and

[0007] A second cavity structure, wherein at least one of the first cavity structures is provided with the second cavity structure, the second cavity structure is airtightly connected to the bottom plate to form a second air cavity, and at least one wall surface of the second cavity structure forming the second air cavity is a second vibration wall.

[0008] In one embodiment, a wall surface of the first enclosure structure facing away from the bottom plate is the first vibration wall; and / or a wall surface of the second enclosure structure facing away from the bottom plate is the second vibration wall.

[0009] In one embodiment, the first vibration wall and the second vibration wall are arranged parallel to each other.

[0010] In one embodiment, a gap is provided between the outer peripheral wall of the second enclosure structure and the inner peripheral wall of the first enclosure structure.

[0011] In one embodiment, the plurality of first enclosed cavity structures are distributed in a rectangular array; and one of the first enclosed cavity structures is provided with one of the second enclosed cavity structures.

[0012] In one embodiment, a first flat membrane is connected between two adjacent first cavity structures, and the first flat membrane and the first cavity structure are an integrated thin film member;

[0013] A second flat membrane is connected between two adjacent second cavity structures, and the second flat membrane and the second cavity structure are an integrated thin film member;

[0014] The second flat film is attached and fixed to the bottom plate, the first flat film is attached to a side of the second flat film away from the bottom plate, and the first enclosure structure is covered on the outside of the second enclosure structure.

[0015] In one embodiment, the integrated film piece is made of polypropylene material.

[0016] In one embodiment, a wall thickness dimension D1 of the first vibration wall satisfies: D1≤1 mm; and / or a wall thickness dimension D2 of the second vibration wall satisfies: D2≤1 mm.

[0017] In one embodiment, the height of the first enclosure structure is defined as H1, and the height of the second enclosure structure is defined as H2, satisfying the following conditions: 20 mm ≤ H1 ≤ 30 mm, 10 mm ≤ H2 ≤ 20 mm, and H1>H2.

[0018] In one embodiment, the first cavity structure and the second cavity structure are cubic structures, and the bottom surface shape of the first cavity structure and the bottom surface shape of the second cavity structure are similar to each other.

[0019] In one embodiment, the volumes of at least two adjacent first air cavities are different; and / or the volumes of at least two adjacent second air cavities are different.

[0020] In one embodiment, in the thickness direction of the bottom plate, at least two adjacent first cavity structures have different heights; and / or at least two adjacent second cavity structures have different heights.

[0021] To achieve the above objectives, the present invention also provides a compressor, including a compressor body and the above-mentioned noise reduction structure, wherein the noise reduction structure is wrapped around the outer periphery of the compressor body, and the multiple first cavity structures are arranged on the surface of the bottom plate facing the compressor body.

[0022] To achieve the above object, the present invention also provides a refrigeration device, including the above compressor.

[0023] In the noise reduction structure of the technical solution of the present invention, a plurality of first cavity structures are distributed in an array on the surface of the bottom plate facing the sound source, and the first cavity structure is airtightly connected to the bottom plate to form a first air cavity, and at least one of the walls of the first cavity structure forming the first air cavity is a first vibration wall, so that the first vibration wall and the first air cavity form a resonance system, which can absorb and isolate the transmitted noise. At the same time, a second cavity structure is provided in the first cavity structure, and the second cavity structure is airtightly connected to the bottom plate to form a second air cavity, and at least one of the walls of the second cavity structure forming the second air cavity is a second vibration wall, so that the second vibration wall and the second air cavity form a resonance system, which can further absorb and isolate noise, achieve dual sound absorption and sound insulation effects, and widen the frequency range of noise that can be absorbed. When the noise reduction structure is applied to a compressor, it can effectively reduce the noise in the low-frequency to medium-frequency range of the compressor, and achieve better noise reduction and sound insulation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a noise reduction structure of the present invention;

[0026] Figure 2 A full cross-sectional view of the structure of an embodiment of the noise reduction structure of the present invention;

[0027] Figure 3 for Figure 2 A partial enlarged view of the M in the middle;

[0028] Figure 4 This is a comparison diagram of sound transmission loss using finite element simulation and experimental results for the noise reduction structure of the present invention.

[0029] Description of Figure Numbers:

[0030] Label name Label name 1 Base Plate 31 Second enclosure structure 21 The first enclosure structure 31a Second vibrating wall 21a First vibrating wall 301 Second air chamber 201 First air chamber 32 Second flat film 22 The first flat film

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention proposes a noise reduction structure that can be wrapped or attached to the outside of a sound source structure such as a compressor to achieve noise reduction and sound insulation effects, especially for low-frequency to medium-frequency noise, and improves the user experience. The noise reduction structure is described below.

[0037] In the embodiment of the present invention, Figures 1 to 4 As shown, the noise reduction structure includes a base plate 1 , a plurality of first enclosure structures 21 and a second enclosure structure 31 .

[0038] A plurality of first cavity structures 21 are distributed at intervals on the surface of the bottom plate 1 facing the sound source. The first cavity structures 21 are airtightly connected to the bottom plate 1 to form a first air cavity 201. At least one wall surface of the first cavity structure 21 forming the first air cavity 201 is a first vibration wall 21a.

[0039] A second cavity structure 31 is disposed in at least one first cavity structure 21 . The second cavity structure 31 is airtightly connected to the bottom plate 1 to form a second air cavity 301 . At least one wall of the second cavity structure 31 forming the second air cavity 301 is a second vibration wall 31 a .

[0040] In this embodiment, a plurality of first cavity structures 21 are arranged on the surface of the bottom plate 1 facing the sound source, and the first cavity structures 21 are airtightly connected to the bottom plate 1 to form a first air cavity 201. It can be understood that the first air cavity 201 is a closed gas cavity, and at least one of the wall surfaces of the first cavity structure 21 forming the first air cavity 201 is arranged as a first vibration wall 21a, so that the first vibration wall 21a and the air cavity 201 form a first resonance system (such as a thin film resonance sound absorption structure). When the sound propagates from the sound source to the first cavity structure 21 and contacts with the first vibration wall 21a, and the first vibration wall 21a is excited by the sound wave and the excitation frequency is consistent with the frequency of the first resonance system, the first resonance system formed by the first vibration wall 21a and the first air cavity 201 will resonate, and the vibration of the first vibration wall 21a will consume the energy of the sound wave to achieve the sound absorption effect. At the same time, the first air cavity 201 can also play a sound insulation role. On this basis, at least one first enclosure structure 21 is provided with a second enclosure structure 31, and the second enclosure structure 31 is airtightly connected to the base plate 1 to form a second air cavity 301, and at least one of the wall surfaces of the second enclosure structure 31 forming the second air cavity 301 is a second vibration wall 31a, so that the second vibration wall 31a and the second air cavity 301 form a second resonance system (such as a thin film resonance sound absorption structure). When the sound is transmitted from the first air cavity 201 to the second vibration wall 31a, the second vibration wall 31a is excited by the sound wave and the excitation frequency is consistent with the frequency of the first resonance system, the second resonance system will resonate, and the vibration of the second vibration wall 31a will consume the energy of the sound wave to achieve the sound absorption effect. At the same time, the second air cavity 301 can also play a further sound insulation role. In this way, after the double sound absorption and sound insulation effect, a better noise reduction effect is achieved.

[0041] It should be noted that, in this embodiment, since the second enclosure structure 31 is inside the first enclosure structure 21, the volumes of the first air cavity 201 and the second air cavity 301 are different, and the resonant sound absorption frequencies of the second resonance system and the first resonance system are different, so that the noise frequencies corresponding to the two are also different, so that the sound absorption frequency coverage range is wider, and it can absorb noise of a wider frequency, and effectively reduce the noise in the low-frequency to medium-frequency band gap.

[0042] At least one of the first cavity structures 21 is provided with a second cavity structure 31. It is understandable that only one of the first cavity structures 21 is provided with a second cavity structure 31, or two or more of the first cavity structures 21 are provided with a second cavity structure 31. Different settings correspond to different noise frequency bands. In practical applications, whether to provide a second cavity structure 31 in the first cavity structure 21 can be set according to actual needs. For example, all of the first cavity structures 21 can be provided with a second cavity structure 31, or only one of the two adjacent first cavity structures 21 can be provided with a second cavity structure 31, or irregular scattered first cavity structures 21 can be provided with a second cavity structure 31.

[0043] At least one of the walls of the first enclosure structure 21 forming the first air cavity 201 is the first vibration wall 21a. It can be understood that only one wall of the first enclosure structure 21 is the first vibration wall 21a, or multiple or all walls of the first enclosure structure 21 are the first vibration wall 21a. When only one or part of the walls of the first enclosure structure 21 are the first vibration wall 21a, the other structures of the first enclosure structure 21 can be rigid parts to support or tension the first vibration wall 21a so that the first vibration wall 21a can be stimulated by sound and vibrate. When all the walls of the first enclosure structure 21 are the first vibration walls 21a, the first enclosure structure 21 itself can be a thin film structure as a whole, and when sound is transmitted, each wall of the first enclosure structure 21 can vibrate accordingly. As an example, the wall of the first enclosure structure 21 facing the sound source is the first vibration wall 21a. At this time, the sound wave is incident from the first vibration wall 21a, which has a better excitation effect on the first vibration wall 21a, thereby consuming more sound wave energy and achieving better sound absorption and noise reduction effects.

[0044] Correspondingly, at least one of the walls of the second air cavity 301 formed by the second cavity structure 31 is the second vibration wall 31a, and only one wall of the second cavity structure 31 may be the second vibration wall 31a, or multiple or all walls of the second cavity structure 31 may be the second vibration wall 31a. When only one or part of the walls of the second cavity structure 31 are the second vibration wall 31a, the other structures of the second cavity structure 31 may be rigid parts, supporting or tensioning the second vibration wall 31a, so that the second vibration wall 31a can be excited by sound and vibrate. When all the walls of the second cavity structure 31 are the second vibration walls 31a, the second cavity structure 31 itself may be a thin film structure as a whole, and when sound is transmitted, each wall of the second cavity structure 31 may vibrate accordingly. As an example, the wall of the second enclosure structure 31 facing the sound source is the second vibration wall 31a. At this time, the sound wave is incident from the second vibration wall 31a, which has a better excitation effect on the second vibration wall 31a, thereby consuming more sound wave energy and achieving better sound absorption and noise reduction effects.

[0045] In actual application, the connection structure between the first cavity structure 21 and the bottom plate 1 can be determined according to the actual situation, such as by gluing or welding, etc., as long as the airtightness of the first air cavity 201 is guaranteed. The multiple first cavity structures 21 can be independent separate structures, each of which forms a first air cavity 201 with the bottom plate 1; or the multiple first cavity structures 21 can also be an integral structure, and the integral structure forms multiple first air cavities 201 with the bottom plate 1. The specific structure and connection method are not limited here. Similarly, the second cavity structure 31 can be connected to the bottom plate 1 in an airtight manner by gluing or welding.

[0046] Optionally, the bottom plate 1 may be a hard plate structure or a flexible plate structure.

[0047] It should be noted that the noise reduction structure in this embodiment forms a closed first air cavity 201 / second air cavity 301. Compared with the Helmholtz resonance sound absorption method, this solution does not require openings in the structure. When applied to compressors or other sound source structures, there is no need to worry about external water vapor such as rain entering, and it does not support bacterial growth, ensuring cleanliness. Optionally, the noise reduction structure can be made translucent, which has an aesthetic appearance and allows staff to see the internal structure clearly.

[0048] As an example, see Figure 4The noise reduction structure in this embodiment was subjected to FEM (finite element) simulation and experimental evaluation of the same sound source. It was found that within the frequency band gap of 500-6000 Hz, an average sound transmission loss (STL) of 45-50 dB could be achieved according to the FEM simulation and experimental evaluation, indicating that the noise reduction structure in this embodiment has better noise reduction capability.

[0049] In the noise reduction structure of the technical solution of the present invention, a plurality of first cavity structures 21 are distributed in an array on the surface of the base plate 1 facing the sound source. The first cavity structure 21 is airtightly connected to the base plate 1 to form a first air cavity 201, and at least one of the walls of the first cavity structure 21 forming the first air cavity 201 is a first vibration wall 21a, so that the first vibration wall 21a and the first air cavity 201 form a resonance system, which can absorb and isolate the transmitted noise. At the same time, a second cavity structure 31 is provided in the first cavity structure 21, and the second cavity structure 31 is airtightly connected to the bottom plate 1 to form a second air cavity 301. At least one of the walls of the second cavity structure 31 forming the second air cavity 301 is a second vibration wall 31a, so that the second vibration wall 31a and the second air cavity 301 form a resonance system, which can further absorb and isolate noise, achieve dual sound absorption and sound insulation effects, and widen the frequency range of absorbable noise. When the noise reduction structure is applied to a compressor, it can effectively reduce the noise in the low-frequency to medium-frequency range of the compressor, thereby achieving better noise reduction and sound insulation effects.

[0050] In one embodiment of the present invention, please refer to Figures 1 to 3 The wall surface of the first enclosure structure 21 away from the bottom plate 1 is the first vibration wall 21a; and / or the wall surface of the second enclosure structure 31 away from the bottom plate 1 is the second vibration wall 31a.

[0051] It can be understood that the first enclosure structure 21 is arranged on the surface of the base plate 1 facing the sound source. By setting the wall surface of the first enclosure structure 21 facing away from the base plate 1 as the first vibration wall 21a, the low- and medium-frequency sound waves can be incident vertically from the first vibration wall 21a. Then, the sound excitation intensity received by the first vibration wall 21a is greater, and the vibration amplitude of the first vibration wall 21a is greater, so that more sound wave energy can be converted into mechanical energy of the first vibration wall 21a, thereby achieving a better sound absorption effect on low- and medium-frequency sounds and improving the noise reduction capability.

[0052] Similarly, by setting the wall surface of the second enclosure structure 31 facing away from the bottom plate 1 as the second vibration wall 31a, the sound waves can be incident vertically from the second vibration wall 31a. Then, the sound excitation intensity received by the second vibration wall 31a is greater, and the vibration amplitude of the second vibration wall 31a is greater, so that more sound wave energy can be converted into mechanical energy of the second vibration wall 31a, thereby achieving a better sound absorption effect.

[0053] As an example, see Figures 1 to 3 The first vibration wall 21a is arranged parallel to and opposite to the bottom plate 1, and the second vibration wall 31a is arranged between the first vibration wall 21a and the bottom plate 1, so that the first vibration wall 21a and the second vibration wall 31a are arranged parallel to and opposite to each other, the first vibration wall 21a and the second vibration wall 31a can vibrate independently without being interfered with, and at the same time, the noise generated by the sound source can be transmitted from the bottom plate 1 after being attenuated by the first vibration wall 21a, the first air cavity 201, the second vibration wall 31a and the second air cavity 301 in sequence, and the noise reduction effect is better.

[0054] Optionally, the first vibration wall 21 a is a vibration film, such as an elastic film.

[0055] Optionally, the second vibration wall 31 a is a vibration film, such as an elastic film.

[0056] For further information, see Figure 3 In order to ensure the vibration sound absorption effect, the wall thickness dimension D1 of the first vibration wall 21a satisfies: D1≤1mm. It can be understood that the wall thickness dimension of the first vibration wall 21a cannot be too large. If it is too large, the rigidity of the first vibration wall 21a is too strong, resulting in poor vibration effect and affecting the sound absorption effect. Based on this, in this embodiment, the wall thickness dimension D1 of the first vibration wall 21a is set to be no more than 1mm to ensure the vibration sensitivity of the first vibration wall 21a and improve the sound absorption effect.

[0057] Similarly, the wall thickness of the second vibration wall 31a cannot be too large. If it is too large, the rigidity of the second vibration wall 31a will be too strong, resulting in poor vibration effect and affecting the sound absorption effect. Based on this, in this embodiment, the wall thickness D2 of the second vibration wall 31a is set to be no more than 1 mm to ensure the vibration sensitivity of the second vibration wall 31a and improve the sound absorption effect.

[0058] In one embodiment of the present invention, please refer to Figures 1 to 3 A gap is set between the outer wall of the second cavity structure 31 and the inner wall of the first cavity structure 21.

[0059] It can be understood that the second cavity structure 31 is arranged inside the first cavity structure 21, and the second vibration wall 31a is arranged opposite to the first vibration wall 21a. By setting a gap between the outer wall of the second cavity structure 31 and the inner wall of the first cavity structure 21, the overall structure of the second cavity structure 31 is set with a gap between the overall structure of the first cavity structure 21, that is, the second cavity structure 31 is not in contact with the first cavity structure 21. Then, the first resonance system and the second resonance system will not be subject to structural interference during vibration and sound absorption, thereby ensuring the vibration performance of the first vibration wall 21a and the second vibration wall 31a and improving the noise reduction capability.

[0060] In one embodiment of the present invention, please refer to Figures 1 to 3, multiple first cavity structures 21 are distributed in a rectangular array; a second cavity structure 31 is provided in a first cavity structure 21 .

[0061] In this embodiment, by distributing a plurality of first enclosure structures 21 in a rectangular array, the sound absorption and sound insulation area of ​​the noise reduction structure is increased, and at the same time, the continuity of the noise absorption of the entire noise reduction structure is improved. In addition, a second enclosure structure 31 is provided in a first enclosure structure 21, which simplifies the assembly molding process and improves production efficiency.

[0062] In one embodiment of the present invention, please refer to Figures 1 to 3 A first flat membrane 22 is connected between two adjacent first cavity structures 21, and the first flat membrane 22 and the first cavity structure 21 are an integral film member; a second flat membrane 32 is connected between two adjacent second cavity structures 31, and the second flat membrane 32 and the second cavity structure 31 are an integral film member; the second flat membrane 32 is adhered and fixed to the bottom plate 1, the first flat membrane 22 is adhered to the side of the second flat membrane 32 away from the bottom plate 1, and the first cavity structure 21 is covered on the outside of the second cavity structure 31.

[0063] In this embodiment, a plurality of first flat membranes 22 connect a plurality of first cavity structures 21 into an integral thin film member, and a plurality of second flat membranes 32 connect a plurality of second cavity structures 31 into an integral thin film member. By fitting and fixing the second flat membranes 32 to the base plate 1, the first flat membranes 22 are fitted and fixed to the second flat membranes 32, so that the first cavity structure 21 can be covered on the outside of the second cavity structure 31, thereby forming a first air cavity 201 and a second air cavity 301.

[0064] Optionally, the second flat membrane 32 is fixedly connected to the bottom plate 1 by gluing; the first flat membrane 22 is fixedly connected to the second flat membrane 32 by gluing.

[0065] As an example, the integrated film piece is formed by polypropylene suction molding or blow molding. Optionally, in order to ensure the strength of the film and the sound absorption effect of low-frequency noise, the integrated film piece of the noise reduction structure is made of polypropylene (PP) with a mass density of 910Kg / m3.

[0066] In one embodiment of the present invention, please refer to Figure 3 , define the height of the first enclosure structure 21 as H1, and the height of the second enclosure structure 31 as H2, satisfying: 20mm≤H1≤30mm, 10mm≤H2≤20mm, H1>H2.

[0067] It can be understood that the first enclosure structure 21 and the bottom plate 1 form a first air cavity 201, and the first vibration wall 21a of the first enclosure structure 21 and the first air cavity 201 form a resonance system (such as a thin film resonance sound absorption structure), then the resonance sound absorption frequency f0 is related to the air layer thickness h of the first air cavity 201 and the surface density m of the first vibration wall 21a: That is, when the thickness h of the air layer and / or the surface density m of the vibration wall are changed, the resonant sound absorption frequency f0 will change, and the frequency that can absorb noise will also change. In practical applications, the thickness of the air layer should not be too large or too small. If it is too large, it will easily affect the sound absorption effect, and if it is too small, it will easily cause interference between the vibration wall and the bottom plate 1. In this embodiment, the height H1 of the first enclosure structure 21 is set to satisfy 20mm≤H1≤30mm, and the height H2 of the second enclosure structure 31 satisfies: 10mm≤H2≤20mm, H1>H2, thereby ensuring the sound absorption and noise reduction effect while preventing interference between the first vibration wall 21a, the second vibration wall 31a and the bottom plate 1. As an example, the height H of the enclosure structure 2 satisfies: 10mm≤H≤20mm.

[0068] In practical applications, the height H1 of the first enclosure structure 21 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm, etc. The height H2 of the second enclosure structure 31 can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm, etc.

[0069] As an example, the height H1 of the first enclosure structure 21 is 30 mm, and the height H2 of the second enclosure structure 31 is 20 mm.

[0070] In one embodiment, see Figures 1 to 3 The first cavity structure 21 and the second cavity structure 31 are cubic structures, and the bottom surface shape of the first cavity structure 21 and the bottom surface shape of the second cavity structure 31 are similar to each other.

[0071] It can be understood that the first cavity structure 21 and the second cavity structure 31 are set as a cubic structure, such as a cube structure or a rectangular parallelepiped structure. This configuration simplifies the overall structure, makes it easier to form and manufacture, and facilitates installation. By making the bottom surface shape of the first cavity structure 21 and the bottom surface shape of the second cavity structure 31 similar to each other, the mold structure design is simplified, and the first cavity structure 21 and the second cavity structure 31 can be realized by only changing the size ratio or height size without additionally changing the mold shape.

[0072] Furthermore, the corners of the first enclosure structure 21 and the second enclosure structure 31 facing away from the bottom plate 1 can be rounded, so that the first enclosure structure 21 and the second enclosure structure 31 form a cubic wedge-shaped structure, which is more convenient for molding and manufacturing, such as blow molding. In addition, the rounded edge structure can increase the area in contact with the sound wave, increase the vibration area, and further improve the sound absorption effect.

[0073] In one embodiment of the present invention, the volumes of at least two adjacent first air cavities 201 are different; and / or the volumes of at least two adjacent second air cavities 301 are different.

[0074] In this embodiment, by setting the volumes of at least two adjacent first air cavities 201 to be different, the resonant frequencies of at least two adjacent first resonance systems are different, so that the frequency of the sound that can be absorbed is wider, and the noise in the low-frequency to medium-frequency band gap range can be effectively reduced. Correspondingly, by setting the volumes of the second air cavities 301 in at least two adjacent first air cavities 201 to be different, the frequency range of the sound that can be absorbed is further widened, a mixed acoustic impedance is generated, and broadband sound insulation and sound absorption performance is achieved.

[0075] In one embodiment of the present invention, in the thickness direction of the bottom plate 1 , at least two adjacent first cavity structures 21 have different heights; and / or at least two adjacent second cavity structures 31 have different heights.

[0076] In this embodiment, by setting the height dimensions of the two adjacent first enclosure structures 21 to be different, the air layer thickness of the two adjacent first air cavities 201 is different, and the frequencies of noise absorption corresponding to the two adjacent first resonance systems are also different, so that noise of a wider frequency can be absorbed and the noise in the low-frequency to medium-frequency band gap can be effectively reduced. Correspondingly, by setting the height dimensions of the two adjacent second enclosure structures 31 to be different, the air layer thickness of the two adjacent second air cavities 301 is different, and the frequency range of sound absorption can be further broadened to achieve broadband sound insulation and sound absorption performance.

[0077] The present invention also proposes a compressor, which includes a compressor body and a noise reduction structure. The specific structure of the noise reduction structure refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the noise reduction structure is wrapped around the periphery of the compressor body, and multiple first enclosure structures 21 are arranged on the surface of the bottom plate 1 facing the compressor body.

[0078] In this embodiment, by arranging multiple first cavity structures 21 toward the compressor body, the noise generated inside the compressor body can first be transmitted to the first cavity structure 21, and sound absorption and sound insulation are performed through the resonance system formed by the first cavity structure 21 and the first air cavity 201 of the bottom plate 1, and the first vibration wall 21a. At the same time, it can be further transmitted to the second cavity structure 31 inside the first cavity structure 21, and sound absorption and sound insulation are performed again through the resonance system formed by the second cavity structure 31 and the second air cavity 301 of the bottom plate 1, thereby enhancing the noise reduction effect of the compressor body, especially having a good sound insulation effect on the low-frequency to medium-frequency noise of the compressor.

[0079] Optionally, the noise reduction structure is wrapped around the periphery of the compressor body and is fixed by bonding at both ends of the bottom plate 1 to ensure the wrapping effect of the noise reduction structure on the compressor body.

[0080] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0081] Optionally, the refrigeration equipment may be an air conditioner, a refrigerator, a cold chain vehicle, and the like.

[0082] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A noise reduction structure, characterized in that: include: Base plate; A plurality of first cavity structures are spaced and distributed on the surface of the bottom plate facing the sound source, the first cavity structures are airtightly connected to the bottom plate to form a first air cavity, and at least one wall surface of the first cavity structure forming the first air cavity is a first vibration wall; as well as A second cavity structure, wherein at least one of the first cavity structures is provided with the second cavity structure, the second cavity structure is airtightly connected to the bottom plate to form a second air cavity, and at least one wall surface of the second cavity structure forming the second air cavity is a second vibration wall.

2. The noise reduction structure according to claim 1, characterized in that: The wall surface of the first enclosure structure away from the bottom plate is the first vibration wall; and / or the wall surface of the second enclosure structure away from the bottom plate is the second vibration wall.

3. The noise reduction structure according to claim 2, characterized in that: The first vibration wall and the second vibration wall are arranged parallel to each other.

4. The noise reduction structure according to claim 3, characterized in that: A gap is set between the outer peripheral wall of the second enclosure structure and the inner peripheral wall of the first enclosure structure.

5. The noise reduction structure according to claim 1, characterized in that: The multiple first enclosure structures are distributed in a rectangular array; one of the first enclosure structures is provided with a second enclosure structure.

6. The noise reduction structure according to any one of claims 1 to 5, characterized in that: A first flat membrane is connected between two adjacent first cavity structures, and the first flat membrane and the first cavity structure are an integrated thin film member; A second flat membrane is connected between two adjacent second cavity structures, and the second flat membrane and the second cavity structure are an integrated thin film member; The second flat film is attached and fixed to the bottom plate, the first flat film is attached to a side of the second flat film away from the bottom plate, and the first enclosure structure is covered on the outside of the second enclosure structure.

7. The noise reduction structure according to claim 6, characterized in that: The integrated film piece is made of polypropylene material.

8. The noise reduction structure according to any one of claims 1 to 5, characterized in that: The wall thickness dimension D1 of the first vibration wall satisfies: D1≤1 mm; and / or the wall thickness dimension D2 of the second vibration wall satisfies: D2≤1 mm.

9. The noise reduction structure according to any one of claims 1 to 5, characterized in that: The height of the first enclosure structure is defined as H1, and the height of the second enclosure structure is defined as H2, satisfying the following conditions: 20 mm ≤ H1 ≤ 30 mm, 10 mm ≤ H2 ≤ 20 mm, and H1>H2.

10. The noise reduction structure according to any one of claims 1 to 5, characterized in that: The first enclosure structure and the second enclosure structure are cubic structures, and the bottom surface shape of the first enclosure structure and the bottom surface shape of the second enclosure structure are similar to each other.

11. The noise reduction structure according to any one of claims 1 to 5, characterized in that: The volumes of at least two adjacent first air cavities are different; and / or the volumes of at least two adjacent second air cavities are different.

12. The noise reduction structure according to claim 11, characterized in that: In the thickness direction of the bottom plate, at least two adjacent first enclosure structures have different heights; and / or at least two adjacent second enclosure structures have different heights.

13. A compressor, characterized in that: It comprises a compressor body and a noise reduction structure as claimed in any one of claims 1 to 12, wherein the noise reduction structure is wrapped around the outer periphery of the compressor body, and the plurality of first enclosure structures are arranged on the surface of the bottom plate facing the compressor body.

14. A refrigeration device, characterized in that: Comprising the compressor of claim 13.

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