Vibration damper and refrigerator

Abstract

The application provides a damping support and a refrigerator. The damping support comprises a first module for damping and a second module for vibration isolation. The first module comprises a first constraint layer, a second constraint layer and a damping layer arranged between the first constraint layer and the second constraint layer. The second module comprises an elastic body. The second constraint layer is fixedly connected with the elastic body. The loss factor of the damping layer is greater than the loss factor of the elastic body. The damping layer and the elastic body are at least partially nested along the radial direction. The damping support and the refrigerator provided by the application can simultaneously achieve a substantial reduction of the vibration amplitude of the compressor body and the vibration force transmitted to the support structure, and the comprehensive noise reduction effect is far superior to that of a single-function rubber pad. Moreover, the nested layout makes the two modules no longer have a simple superposition relationship in the first direction, but share the height space, thereby significantly reducing the overall height of the damping support.

Description

Technical Field

[0001] This invention belongs to the field of refrigeration equipment technology, and more specifically, relates to a vibration damping support and a refrigerator. Background Technology

[0002] As a common household appliance, the operating noise and vibration level of the refrigerator's compressor directly affect the user experience. In the refrigerator's vibration system, the compressor is the core excitation source, with its internal moving parts generating continuous periodic excitation forces during operation. These excitation forces propagate and generate noise primarily through two paths: first, through the rigidly connected intake and exhaust pipes, causing airborne sound radiation; second, through the compressor's mounting structure to the refrigerator's cabinet structure (such as the compressor compartment support plate), causing plate vibration and radiating structural sound.

[0003] Currently, most refrigerator products use simple pads or bushings made of rubber to control compressor vibration. These vibration damping elements primarily rely on the viscoelastic damping of rubber to dissipate energy and provide isolation and buffering through its elastic deformation. However, due to the relatively fixed mechanical properties of conventional rubber materials, there is an irreconcilable contradiction in their design: to meet the stability and displacement control requirements of compressor installation, the material needs high static stiffness, but this usually comes with an increase in dynamic stiffness, leading to a deterioration in vibration isolation in high-frequency vibration regions and an increase in transmission rate; if soft rubber with low dynamic stiffness is used to improve vibration isolation performance, it is difficult to provide sufficient rigid support during compressor start-up, shutdown, or load changes, which may lead to excessive compressor amplitude or even interference with other components. Therefore, existing vibration damping schemes based on a single homogeneous rubber often force trade-offs between multiple objectives such as "support stability," "vibration source suppression," and "vibration isolation," making it difficult to achieve a system-level overall optimal solution. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration damping support and a refrigerator to solve the technical problem of poor vibration damping effect of rubber in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a vibration damping support, which is disposed between a vibration source and a supporting structure, wherein the vibration source points to the supporting structure in an axial direction, and the vibration damping support includes a first module for vibration damping and a second module for vibration isolation;

[0006] The first module includes a first constraint layer, a second constraint layer, and a damping layer disposed between the first constraint layer and the second constraint layer;

[0007] The second module includes an elastomer, the second constraint layer is fixedly connected to the elastomer, the loss factor of the damping layer is greater than the loss factor of the elastomer, and the damping layer and the elastomer are at least partially nested in each other radially, the radial direction being perpendicular to the axial direction.

[0008] The first constraint layer, the damping layer, and the second constraint layer are arranged sequentially in the radial direction. The second constraint layer extends radially to form a connecting flange. The connecting flange is fixedly connected to the elastic body, so that the elastic body and the second constraint layer are spaced apart from each other in the radial direction.

[0009] The first module further includes a first mounting plate connected to the first constraint layer, and the second module further includes a second mounting plate connected to the elastomer. The axial distance S1 between the first mounting plate and the connecting flange is not less than the shear deformation τ of the damping layer, where τ is 1mm to 2mm. The first constraint layer, the damping layer, and the second constraint layer are flush with each other at the ends away from the vibration source. The axial distance S2 between the end of the damping layer away from the vibration source and the second mounting plate is not less than α, where α is the sum of the static compression of the elastomer, the shear deformation of the damping layer, and the amplitude of the damping layer, where α is 2mm to 4mm.

[0010] Optionally, the loss factor of the damping layer is greater than 0.5, and the loss factor of the elastomer is less than 0.2.

[0011] Optionally, the damping layer comprises at least one of waterborne acrylic damping coating, butyl rubber, and high-damping polyurethane; and / or,

[0012] The elastomer includes a rubber block or a metal spring, and the rubber block includes at least one of neoprene rubber, silicone rubber, and natural rubber.

[0013] Optionally, both the damping layer and the elastomer are annular; the damping layer is located on the outer periphery of the elastomer, or the elastomer is located on the outer periphery of the damping layer.

[0014] Optionally, the first constraint layer, the damping layer, the second constraint layer, and the elastomer are arranged sequentially from the inside to the outside, and the connecting flange extends radially outward from the outer peripheral wall of the second constraint layer; or,

[0015] The first constraint layer, the damping layer, the second constraint layer, and the elastomer are arranged sequentially from the outside to the inside, and the connecting flange is formed by extending radially inward from the inner peripheral wall of the second constraint layer.

[0016] Optionally, the first mounting plate is provided with a first mounting structure for connecting to the vibration source; the second mounting plate is provided with a second mounting structure for connecting to the support structure.

[0017] Optionally, the first module and the second module overlap each other at least partially in the axial direction, such that the sum of the heights of the first module and the second module is greater than the height of the vibration damping support.

[0018] The present invention also proposes a refrigerator, including the above-mentioned vibration damping support.

[0019] The beneficial effects of the vibration damping support and refrigerator provided by this invention are as follows: Compared with the prior art, the vibration damping support of this invention includes a first module and a second module. The damping layer of the first module and the elastic body of the second module are at least partially nested together radially. The vibration generated by the vibration source is first transmitted to the damping layer of the first module (with a large loss factor) to dissipate the vibration energy for vibration damping. Then, the remaining vibration energy is transmitted to the elastic body of the second module (with a small loss factor) to isolate the vibration force transmitted to the supporting structure. The combination of the two can simultaneously achieve a significant reduction in the vibration amplitude of the compressor body and the vibration force transmitted to the supporting structure, and the overall noise reduction effect is far superior to that of a single-function rubber pad. Moreover, the nested layout means that the two modules are no longer simply superimposed in the first direction, but share the height space, thereby significantly reducing the overall height of the vibration damping support. By limiting the key dimensions S1 and S2, precise physical space is reserved for the maximum shear deformation of the damping layer and the tensile and compressive deformation of the elastic body. Gap S1 ensures that the damping material can fully exert its shear energy dissipation effect without mechanical interference; gap S2 fully considers the static pre-compression, working deformation of the elastomer and the space that the damping layer may occupy due to movement, fundamentally avoiding hard collisions between components under extreme working conditions, ensuring the reliability and quietness of the vibration damping support under long-term dynamic loads, and is a key design parameter to ensure the realization of the invention concept. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A three-dimensional structural diagram of the first type of vibration damping support provided in an embodiment of the present invention;

[0022] Figure 2 A cross-sectional view of the first type of vibration damping support provided in an embodiment of the present invention;

[0023] Figure 3 An exploded structural diagram of the first type of vibration damping support provided in an embodiment of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the second type of vibration damping support provided in an embodiment of the present invention;

[0025] Figure 5 A cross-sectional view of the second type of vibration damping support provided in an embodiment of the present invention;

[0026] Figure 6 This is an exploded structural diagram of the second type of vibration damping support provided in an embodiment of the present invention.

[0027] The following are the labeling elements in the figure:

[0028] 10-First module; 11-First constraint layer; 111-First mounting plate; 112-First mounting structure; 12-Second constraint layer; 121-Connecting flange; 13-Damping layer;

[0029] 20 - Second module; 21 - Elastomer; 22 - Second mounting plate; 23 - Second mounting structure. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention.

[0033] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] As described in the background section, refrigerator compressors generate vibration noise during operation. In a static state, the support needs sufficient stiffness to support the compressor's weight and limit its displacement; in a dynamic state, the support needs good elasticity to isolate vibration transmission. However, current supports mostly use rubber materials for vibration damping. The mechanical properties of rubber materials determine that static stiffness and dynamic stiffness are inherently related. Increasing static stiffness inevitably leads to an increase in dynamic stiffness, reducing vibration isolation; conversely, reducing dynamic stiffness to improve vibration isolation performance results in insufficient static support. Therefore, traditional rubber pads struggle to achieve optimal performance simultaneously in both suppressing vibration sources (vibration reduction) and isolating transmission (vibration isolation), leading to poor vibration damping.

[0035] To alleviate or solve the technical problem of poor vibration reduction effect, the vibration reduction function and vibration isolation function are separated into different structural layers, namely the first module 10 and the second module 20. The first module 10 includes a first constraint layer 11, a damping layer 13, and a second constraint layer 12. The damping layer 13 uses a high loss factor material, and its in-plane deformation is restricted by the constraint layer, resulting in larger shear deformation (rather than the smaller tensile and compressive deformation of traditional free damping). This further increases the loss factor of the damping material by 3 to 5 times, greatly improving the efficiency of vibration energy conversion into heat energy dissipation. The elastic body 21 of the second module 20 uses a low loss factor material, which isolates vibration transmission through elastic deformation, reduces the force transmitted to the supporting structure, and thus improves the vibration reduction effect.

[0036] The vibration damping support provided in the embodiments of the present invention will now be described. The vibration damping support is disposed between the vibration source and the supporting structure. The vibration source can be the vibration generated by equipment such as a compressor during operation, and the supporting structure can be a base plate or similar structure that mounts and supports the compressor. By providing a support structure between the vibration source and the supporting structure, the transmission of vibration generated by the vibration source to the supporting structure can be reduced, thereby reducing the vibration noise generated by the refrigerator.

[0037] Please refer to the following: Figures 1 to 6 The vibration damping support includes a first module 10 for vibration damping and a second module 20 for vibration isolation;

[0038] The first module 10 includes a first constraint layer 11, a second constraint layer 12, and a damping layer 13 disposed between the first constraint layer 11 and the second constraint layer 12.

[0039] The second module 20 includes an elastic body 21, a second constraint layer 12 fixedly connected to the elastic body 21, a damping layer 13 with a loss factor greater than that of the elastic body 21, and the damping layer 13 and the elastic body 21 are at least partially nested together radially, with the radial direction perpendicular to the axial direction.

[0040] Here, the axial direction refers to the direction from the vibration source to the supporting structure. When the first module 10 or the second module 20 is a rotating structure, the axial direction is also the axial direction of the first module 10 and the second module 20.

[0041] The damping layer 13 of the first module 10 is made of a high-loss-factor material. Its surface deformation is restricted by the first constraint layer 11 and the second constraint layer 12, causing shear deformation to occur inside the damping layer 13. The direction of this shear deformation can be axial or near-axial. The shear deformation of the damping layer 13 converts vibration energy into heat energy for dissipation. Both the first constraint layer 11 and the second constraint layer 12 are made of rigid materials to constrain the deformation of the damping layer 13. Because the damping layer 13 has a high loss factor, the two constraint layers prevent the damping layer 13 from collapsing and facilitate shear deformation of the damping layer 13 relative to the first constraint layer 11 and the second constraint layer 12.

[0042] The elastomer 21 has a low loss factor (lower than the loss factor of the damping layer 13). When vibration is transmitted to the second module 20, the elastomer 21 will undergo axial tensile and compressive deformation, which can isolate the vibration transmission and reduce the vibration force transmitted to the support structure.

[0043] At least a portion of the damping layer 13 and the elastic body 21 are radially nested together, with the damping layer 13 at least partially disposed on the outer periphery of the elastic body 21, or the elastic body 21 at least partially disposed on the outer periphery of the damping layer 13. This arrangement ensures that the first module 10 and the second module 20 are no longer simply stacked in the axial direction, but rather share a height space, thereby significantly reducing the overall height of the vibration damping support (excessive height affects vibration damping performance) and solving the problem of simultaneously achieving both vibration damping support height and vibration damping performance.

[0044] The core working principle of this invention is not limited to the series mechanism of "damping layer 13 first reduces vibration, then elastic body 21 isolates vibration," but can also be "elastic body 21 isolates vibration first, then damping layer 13 reduces vibration." Theoretically, both have the same effect on compressor vibration reduction and support plate vibration isolation. Therefore, in this invention, the vibration source, damping layer 13, elastic body 21, and support structure (damping layer 13 first reduces vibration, then elastic body 21 isolates vibration) are arranged sequentially along the force transmission direction, or the vibration source, elastic body 21, damping layer 13, and support structure are arranged sequentially along the force transmission direction (elastic body 21 first isolates vibration, then damping layer 13 reduces vibration). The following explanation only uses the vibration transmission order "damping layer 13 first reduces vibration, then elastic body 21 isolates vibration."

[0045] When the vibration source transmits vibration, the vibration is first transmitted to the first module 10, where a relative displacement occurs between the first constraint layer 11 and the second constraint layer 12. This forces the intermediate damping layer 13 to undergo repeated shear deformation. During this process, a large amount of vibration energy is rapidly converted into heat energy and dissipated by the high-loss-factor damping layer 13, thus significantly reducing the vibration. The vibration attenuated by the first module 10 continues to be transmitted to the elastic body 21 of the second module 20. The low-loss-factor elastic body 21 acts like a soft "spring," and because its dynamic stiffness is much lower than the system excitation frequency, it efficiently isolates the vibration, making the vibration force ultimately transmitted to the supporting structure very small. The vibration energy (vibration source) of the compressor is first transmitted to the first module 10 (damping layer 13) to dissipate the vibration energy, especially the energy during resonance; the remaining vibration energy is transmitted to the second module 20 (elastic body 21) through the connecting structure, isolating the force transmitted to the supporting structure. The combination of the two can simultaneously reduce the vibration amplitude of the compressor and the vibration force transmitted to the support plate. The overall noise reduction effect is far superior to that of a single-function rubber pad, and also far superior to the case of axial stacking of the first module 10 and the second module 20.

[0046] The vibration damping support in the above embodiment includes a first module 10 and a second module 20. The damping layer 13 of the first module 10 and the elastic body 21 of the second module 20 are at least partially nested together radially. The vibration generated by the vibration source is first transmitted to the damping layer 13 (with a large loss factor) of the first module 10 to dissipate the vibration energy for vibration damping. Then, the remaining vibration energy is transmitted to the elastic body 21 (with a small loss factor) of the second module 20 to isolate the vibration force transmitted to the supporting structure. The combination of the two can simultaneously achieve a significant reduction in the vibration amplitude of the compressor body and the vibration force transmitted to the supporting structure, and the overall noise reduction effect is far superior to that of a single-function rubber pad. Moreover, the nested layout means that the two modules are no longer simply superimposed in the first direction, but share the height space, thereby significantly reducing the overall height of the vibration damping support.

[0047] In some embodiments of the present invention, the loss factor of the damping layer 13 is greater than 0.5, and the loss factor of the elastomer 21 is less than 0.2. This differentiated configuration of material properties enhances the functional separation effect. The damping layer 13 is made of a material with a loss factor greater than 0.5 to ensure sufficient energy dissipation. The elastomer 21 is made of a material with a loss factor less than 0.2 to ensure good elastic isolation performance. This material configuration not only achieves a precise match between functional requirements but also avoids mutual interference between vibration reduction and vibration isolation through differences in material properties.

[0048] By using materials with a specific loss factor range, the first module 10 is ensured to have sufficient energy dissipation capacity and the second module 20 to have sufficient elastic isolation capacity. If the loss factor of the damping layer 13 is too small, the vibration reduction effect will be insufficient. If the loss factor of the elastic body 21 is too large, the vibration isolation performance will decrease. This further improves the overall performance of the vibration control system and achieves a more significant vibration reduction and isolation effect.

[0049] In some embodiments, the loss factor of the damping layer 13 is 0.55, 0.67, 0.82, 0.85, 0.92, etc., and the loss factor of the elastomer 21 is 0.117, 0.14, 0.11, 0.1, etc.

[0050] In some embodiments of the present invention, please refer to Figures 1 to 4 The damping layer 13 has a loss factor greater than 1, while the elastomer 21 has a loss factor less than 0.1. In this embodiment, the functional separation effect is enhanced through differentiated material properties. The damping layer 13 is made of a material with a loss factor greater than 1 to ensure sufficient energy dissipation capacity. The elastomer 21 is made of a material with a loss factor less than 0.1 to ensure good elastic isolation performance. This material configuration not only achieves precise matching of functional requirements but also avoids mutual interference between vibration reduction and vibration isolation through differences in material properties.

[0051] By using materials with a specific loss factor range, the first module 10 is ensured to have sufficient energy dissipation capacity and the second module 20 to have sufficient elastic isolation capacity. If the loss factor of the damping layer 13 is too small, the vibration reduction effect will be insufficient. If the loss factor of the elastic body 21 is too large, the vibration isolation performance will decrease. This further improves the overall performance of the vibration control system and achieves a more significant vibration reduction and isolation effect.

[0052] In some embodiments, the loss factor of the damping layer 13 is 1.12, 1.15, 1.21, 1.26, 1.29, etc., and the loss factor of the elastomer 21 is 0.09, 0.08, 0.06, 0.05, etc.

[0053] In some embodiments of the present invention, the damping layer 13 comprises at least one of waterborne acrylic damping coating, butyl rubber, and high-damping polyurethane. The waterborne acrylic damping coating is formed into the damping layer 13 by spraying or scraping, and forms a viscoelastic film after curing; the butyl rubber is formed by molding process and has good damping performance and aging resistance; the high-damping polyurethane is formed by casting process and has high loss factor and mechanical strength.

[0054] In some embodiments of the present invention, the elastomer 21 includes a rubber block or a metal spring. The rubber block includes at least one of neoprene rubber, silicone rubber, and natural rubber, and the metal spring may be a helical metal spring or a wave spring. Since the elastomer 21 may include a rubber block or a metal spring, it can be a block-shaped or spring-like structure, and its specific structural type is not limited here. Neoprene rubber has good oil resistance and aging resistance; silicone rubber has a wide operating temperature range; and natural rubber has high elasticity.

[0055] In some embodiments, the elastic block may be solid, hollow, cylindrical, frustum-shaped, etc., and its specific structural shape is not limited.

[0056] In some embodiments, when the elastic body 21 includes a metal spring, at least a plurality of fixing bars are provided at the top and bottom of the spring for limiting the spring. Optionally, at least three metal bars, each 0.5 mm thick, 1 mm wide, and at least 4-5 mm high, are welded to the corresponding plate surface at the top and bottom of the spring to fix the position of the spring.

[0057] By using the aforementioned types of damping and elastic materials, the material properties are ensured to meet the functional requirements of vibration reduction and isolation, further improving the reliability and durability of the vibration control system, thereby achieving the technical effect of long-term stable operation.

[0058] In some embodiments of the present invention, please refer to Figure 3 and Figure 6 Both the first restraint layer 11 and the second restraint layer 12 comprise at least one of aluminum alloy, engineering plastic, and fiber-reinforced composite materials. The first restraint layer 11 and the second restraint layer 12 are made of high-stiffness materials, such as aluminum alloy, engineering plastic, or fiber-reinforced composite materials. Aluminum alloy has high elastic modulus and strength, effectively limiting the in-plane deformation of the damping layer 13; engineering plastics such as polyamide and polycarbonate have good mechanical properties and processability; fiber-reinforced composite materials such as carbon fiber reinforced plastic and glass fiber reinforced plastic have high specific stiffness and high specific strength.

[0059] In some embodiments of the present invention, please refer to Figures 1 to 3 Both the damping layer 13 and the elastomer 21 are annular, with the elastomer 21 located on the outer periphery of the damping layer 13. In the axial direction, the elastomer 21 at least partially overlaps with the damping layer 13, which can reduce the height of the vibration damping support. When the vibration is transmitted to the first module 10, the relative positions of the first constraint layer 11 and the second constraint layer 12 change, and the damping layer 13 undergoes shear deformation. After being damped by the damping layer 13, the vibration energy is transmitted to the external elastomer 21, isolating the vibration energy transmitted to the supporting structure.

[0060] In some embodiments of the present invention, please refer to Figures 4 to 6Both the damping layer 13 and the elastic body 21 are annular, with the damping layer 13 located on the outer periphery of the elastic body 21. In the axial direction, the damping layer 13 at least partially overlaps with the elastic body 21, which can reduce the height of the vibration damping support. When the vibration is transmitted to the first module 10, the relative positions of the first constraint layer 11 and the second constraint layer 12 change, and the damping layer 13 undergoes shear deformation. After being damped by the damping layer 13, the vibration energy is transmitted to the internal elastic body 21, isolating the vibration energy transmitted to the supporting structure.

[0061] The nested damping layer 13 and elastomer 21 are both annular structures, giving the nested structure symmetry and a good force transmission path. This structure is easy to manufacture and assemble, and provides uniform vibration reduction and isolation effects. The two optional solutions offer flexibility to adapt to different installation space constraints, enhancing the applicability of the invention.

[0062] Whether the elastic body 21 is located on the outer periphery of the damping layer 13, or the damping layer 13 is located on the outer periphery of the elastic body 21, the second damping layer 13 of the first module 10 is fixedly connected to the elastic body 21. The vibration force is first transmitted to the damping layer 13, and then transmitted to the elastic body 21 through the above-mentioned connection structure, forming a series connection of motion and force, which is not a geometrically stacked series connection. This type of series connection can not only achieve effective vibration isolation and reduction, but also make the vibration damping support more compact and reduce its height, so as not to affect the vibration reduction effect.

[0063] In some embodiments of the present invention, please refer to Figures 1 to 6 The first constraint layer 11, the damping layer 13, and the second constraint layer 12 are arranged radially in sequence. The second constraint layer 12 extends radially to form a connecting flange 121, which is fixedly connected to the elastic body 21, thus spacing the elastic body 21 and the second constraint layer 12 from each other in the radial direction. The connecting flange 121 separates the elastic body 21 and the second constraint layer 12 radially. This means that the axial shear deformation space of the damping layer 13 is separated from the installation space of the elastic body 21 radially. This design ensures that the shear motion of the damping layer 13 is not radially constrained by the elastic body 21, while the connecting flange 121 ensures that vibration energy can be effectively transferred from the second constraint layer 12 to the elastic body 21.

[0064] By fixing the elastic body 21 with a connecting flange 121 extending radially from the second constraint layer 12 and spacing it radially from the second constraint layer 12, this structure achieves physical separation between the working space of the damping layer 13 and the installation space of the elastic body 21. The connecting flange 121 acts as a bridge for force transmission, ensuring the effective transfer of vibration energy from the damping layer 13 to the elastic body 21. Its radial extension avoids unnecessary radial constraint on the damping layer 13 during axial shear deformation, ensuring that the damping layer 13 can freely undergo the shear deformation required by the design, thereby improving vibration reduction efficiency.

[0065] In some embodiments of the present invention, please refer to Figures 1 to 3 The first constraint layer 11, the damping layer 13, the second constraint layer 12, and the elastic body 21 are arranged sequentially from the inside to the outside, and the connecting flange 121 extends radially outward from the outer peripheral wall of the second constraint layer 12. In this embodiment, the elastic body 21 is located on the outer periphery of the damping layer 13. Vibration is first transmitted to the damping layer 13 and then transmitted to the outer periphery of the elastic body 21 through the connecting flange 121.

[0066] In some embodiments of the present invention, please refer to Figures 4 to 6 The first constraint layer 11, the damping layer 13, the second constraint layer 12, and the elastic body 21 are arranged sequentially from the outside to the inside, and the connecting flange 121 extends radially inward from the inner peripheral wall of the second constraint layer 12. In this embodiment, the damping layer 13 is located on the outer periphery of the elastic body 21, and the vibration is first transmitted to the damping layer 13 and then transmitted to the inner elastic body 21 through the connecting flange 121.

[0067] Through the above-mentioned radial nesting design, the positions of the damping layer 13 and the elastomer 21 can be selected according to the requirements, and both radial nesting and axial overlap can be achieved, which can adapt to different overall layout requirements.

[0068] In some embodiments, the connecting flange 121 is an annular flange that extends continuously from the second constraint layer 12, or it may be a plurality of connecting lugs that are spaced apart circumferentially.

[0069] In some embodiments of the present invention, please refer to Figures 1 to 6The first module 10 further includes a first mounting plate 111 connected to the first constraint layer 11, and a first mounting structure 112 disposed on the first mounting plate 111 for connection to the vibration source. The second module 20 further includes a second mounting plate 22 connected to the elastic body 21, and a second mounting structure 23 disposed on the second mounting plate 22 for connection to the support structure. The first mounting plate 111 is used to connect to the first constraint layer 11, and the first mounting structure 112 disposed on the first mounting plate 111 facilitates the connection between the first module 10 and the vibration source. The second mounting plate 22 is used to connect to the second constraint layer 12, and the second mounting structure 23 disposed on the second mounting plate 22 facilitates the connection between the second module 20 and the support structure.

[0070] The addition of a first mounting plate 111, a first mounting structure 112, a second mounting plate 22, and a second mounting structure 23 provides a reliable connection structure between the vibration damping support and the vibration source and supporting structure. This simplifies the on-site installation process, improves assembly efficiency and connection stability, and allows the integrated vibration damping support to be easily integrated into various equipment as a complete modular component.

[0071] The connection between the first mounting structure 112 and the vibration source, the connection between the second module 20 and the first module 10 via the connecting flange 121, and the connection between the second mounting structure 23 and the support structure ensure that the first module 10 maintains a force and motion transmission relationship with the second module 20 only in the axial direction, while maintaining an appropriate gap in the radial direction to ensure that the elastic body 21 of the second module 20 is not obstructed during tensile and compressive deformation. More specifically, the first module 10 and the second module 20 are connected in series along the vibration transmission path.

[0072] In other embodiments, the first mounting structure 112 may be connected to the support structure, and the second mounting structure 23 may be connected to the vibration source.

[0073] In some embodiments, please refer to Figures 1 to 3 The first constraint layer 11 has a cylindrical structure, the damping layer 13 is located on the outer periphery of the first constraint layer 11, and a first mounting plate 111 extends radially outward from the bottom of the first constraint layer 11. A first mounting structure 112 is fixed to the first mounting plate 111. In other embodiments, the first mounting structure 112 may also be fixed to the inner wall of the first constraint layer 11. In this embodiment, the connecting flange 121 may be fixed to the top of the elastic body 21, and the second mounting plate 22 may be fixed to the bottom of the elastic body 21.

[0074] Optionally, the first mounting structure 112 may be a bolt or a nut.

[0075] In some embodiments, please refer to Figures 4 to 6The first constraint layer 11 has a cylindrical structure, and the first mounting plate 111 can be located at one axial end of the first constraint layer 11. The first mounting structure 112 is fixed to the middle of the first mounting plate 111. In this embodiment, the connecting flange 121 can be fixed to the top of the elastic body 21, and the second mounting plate 22 is fixed to the bottom of the elastic body 21.

[0076] Optionally, the second mounting structure 23 may be a bolt or a nut.

[0077] In some embodiments of the present invention, please refer to Figures 1 to 6 The axial distance S1 between the first mounting plate 111 and the connecting flange 121 is not less than the shear deformation τ of the damping layer 13, where τ is 1mm to 2mm. When vibration is transmitted to the first module 10, the damping layer 13 undergoes corresponding shear deformation. If the shear deformation of the damping layer 13 is too large, it will cause interference between the damping layer 13, the constraint layer, etc., and the first mounting plate 111. Therefore, it is necessary to rationally design the axial distance S1 between the first mounting plate 111 and the connecting flange 121. The first module should be miniaturized as much as possible without causing structural interference.

[0078] In some embodiments of the present invention, please refer to Figures 1 to 6 The first constraint layer 11, damping layer 13, and second constraint layer 12 are flush with each other at the ends away from the vibration source. The axial distance S2 between the end of damping layer 13 away from the vibration source and the second mounting plate 22 is not less than α, where α is the sum of the static compression of elastic body 21, the shear deformation of damping layer 13, and the amplitude of damping layer 13, and α is 2mm to 4mm. In the static installation state, elastic body 21 is pre-compressed, and the deformation of elastic body 21 at this time is the static compression of elastic body 21, while damping layer 13 is in an unsheared state. When the vibration source generates small-amplitude vibrations, damping layer 13 undergoes shear deformation, generating a shear deformation amount (less than τ), and elastic body 21 undergoes small-amplitude dynamic deformation near the static compression amount. Vibration energy is partially consumed and partially isolated. When the vibration source starts, stops, or experiences large-amplitude vibrations, the shear deformation of damping layer 13 may approach τ, and the dynamic deformation of elastic body 21 increases.

[0079] By defining the key dimensions S1 and S2, precise physical space is reserved for the maximum shear deformation of the damping layer 13 and the tensile and compressive deformation of the elastic body 21. Gap S1 ensures that the damping material can fully exert its shear energy dissipation effect without mechanical interference; gap S2 comprehensively considers the static pre-compression and working deformation of the elastic body 21, as well as the space that the damping layer 13 may occupy during movement, fundamentally avoiding hard collisions between components under extreme working conditions, ensuring the reliability and quiet operation of the vibration damping support under long-term dynamic loads, and is a key design parameter that ensures the realization of the invention concept.

[0080] Among them, the shear deformation of the damping layer 13 and the tensile and compressive deformation of the elastic body 21 are both axial or near-axial deformations, which are more consistent with the vibration direction of the vibration source. Therefore, the energy dissipation effect of the damping layer 13 and the vibration isolation effect of the elastic body 21 are better.

[0081] In some embodiments of the present invention, please refer to Figures 1 to 6 The first module 10 and the second module 20 overlap at least partially in the axial direction, such that the sum of the heights of the first module 10 and the second module 20 is greater than the height of the vibration damping support. This "radial nesting" design, where the first module 10 and the second module 20 overlap at least partially in the axial direction, provides the advantage of space compression. Through nesting, the two modules do not simply overlap in height but share axial space, thus minimizing the total axial height of the entire vibration damping support, making it extremely suitable for applications with strict limitations on installation thickness.

[0082] In some embodiments, the total height of the vibration damping support is no more than 15mm, preferably no more than 10mm. The height of the vibration damping support can be reduced by the overlapping design of the first module 10 and the second module 20 in the axial direction. If the height of the vibration damping support is too high, it will affect the overall stability of the compressor; if the height of the vibration damping support is too low, it will affect the vibration damping effect.

[0083] The present invention also provides a refrigerator, which includes the vibration damping support as described in any of the above embodiments. The refrigerator further includes a compressor and a support structure, wherein the compressor acts as a vibration source during operation, and the vibration damping support is disposed between the compressor and the support structure. The support structure may be a support plate, etc.

[0084] The refrigerator provided by this invention employs the aforementioned vibration damping support, which includes a first module 10 and a second module 20. The damping layer 13 of the first module 10 and the elastic body 21 of the second module 20 are at least partially nested radially. Vibration generated by the vibration source is first transmitted to the damping layer 13 (with a larger loss factor) of the first module 10 to dissipate vibration energy and achieve vibration damping. Then, the remaining vibration energy is transmitted to the elastic body 21 (with a smaller loss factor) of the second module 20, isolating the vibration force transmitted to the supporting structure. The combination of these two components can simultaneously achieve a significant reduction in both the vibration amplitude of the compressor body and the vibration force transmitted to the supporting structure, resulting in a comprehensive noise reduction effect far superior to that of a single-function rubber pad. Furthermore, the nested layout means that the two modules are no longer simply superimposed in the first direction, but rather share a common height, thereby significantly reducing the overall height of the vibration damping support.

[0085] In some embodiments, multiple vibration damping supports can be provided between the vibration source and the supporting structure to make the vibration source more stable and greatly improve the vibration damping effect.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration damping support, disposed between a vibration source and a supporting structure, wherein the vibration source points axially toward the supporting structure, characterized in that, It includes a first module for vibration reduction and a second module for vibration isolation; The first module includes a first constraint layer, a second constraint layer, and a damping layer disposed between the first constraint layer and the second constraint layer; The second module includes an elastomer, the second constraint layer is fixedly connected to the elastomer, the loss factor of the damping layer is greater than the loss factor of the elastomer, and the damping layer and the elastomer are at least partially nested in each other radially, the radial direction being perpendicular to the axial direction. The first constraint layer, the damping layer, and the second constraint layer are arranged sequentially in the radial direction. The second constraint layer extends radially to form a connecting flange. The connecting flange is fixedly connected to the elastic body, so that the elastic body and the second constraint layer are spaced apart from each other in the radial direction. The first module further includes a first mounting plate connected to the first constraint layer, and the second module further includes a second mounting plate connected to the elastomer. The axial distance S1 between the first mounting plate and the connecting flange is not less than the shear deformation τ of the damping layer, where τ is 1mm to 2mm. The first constraint layer, the damping layer, and the second constraint layer are flush with each other at the ends away from the vibration source. The axial distance S2 between the end of the damping layer away from the vibration source and the second mounting plate is not less than α, where α is the sum of the static compression of the elastomer, the shear deformation of the damping layer, and the amplitude of the damping layer, where α is 2mm to 4mm.

2. The vibration damping support as described in claim 1, characterized in that, The loss factor of the damping layer is greater than 0.5, and the loss factor of the elastomer is less than 0.

2.

3. The vibration damping support as described in claim 1, characterized in that, The damping layer comprises at least one of water-based acrylic damping coating, butyl rubber, and high-damping polyurethane; and / or The elastomer includes a rubber block or a metal spring, and the rubber block includes at least one of neoprene rubber, silicone rubber, and natural rubber.

4. The vibration damping support as described in claim 1, characterized in that, Both the damping layer and the elastomer are annular; the damping layer is located on the outer periphery of the elastomer, or the elastomer is located on the outer periphery of the damping layer.

5. The vibration damping support as described in any one of claims 1-4, characterized in that, The first constraint layer, the damping layer, the second constraint layer, and the elastomer are arranged sequentially from the inside to the outside, and the connecting flange extends radially outward from the outer peripheral wall of the second constraint layer; or... The first constraint layer, the damping layer, the second constraint layer, and the elastomer are arranged sequentially from the outside to the inside, and the connecting flange is formed by extending radially inward from the inner peripheral wall of the second constraint layer.

6. The vibration damping support as described in claim 5, characterized in that, The first mounting plate is provided with a first mounting structure, which is used to connect with the vibration source; the second mounting plate is provided with a second mounting structure, which is used to connect with the support structure.

7. The vibration damping support as described in any one of claims 1-4, characterized in that, The first module and the second module overlap each other at least partially in the axial direction, such that the sum of the heights of the first module and the second module is greater than the height of the vibration damping support.

8. A refrigerator, characterized in that, Includes the vibration damping support as described in any one of claims 1-7.

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