A vibration damping component and a laundry treating apparatus

Abstract

The present invention belongs to the technical field of clothing treatment, and discloses a vibration damping component and a clothing treatment device. The vibration damping component is used for a device that generates vibration during operation, and includes: a foot, the foot is a cavity structure, and a phononic crystal structure is embedded in the cavity structure; the phononic crystal structure includes multiple layers of different vibration damping units, and the multiple layers of different vibration damping units are configured to correspond to different vibration frequency bands of the device. By designing the phononic crystal structure to include multiple layers of vibration damping units, each vibration damping unit corresponding to a specific vibration frequency band, the vibration damping effect of a wide frequency band is achieved, enabling effective local resonance within multiple vibration frequency bands, adapting to vibrations under different working conditions, and accurately regulating the frequency band gap according to the common frequencies of different models, thereby improving the vibration damping effect.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing treatment, and particularly to a vibration damping component and a clothing treatment device. Background Art

[0002] Among devices that generate vibrations during operation, especially clothing treatment devices, the drum generates vibration noise during operation. The cabinet part of the clothing treatment device is an important part for blocking the transmission of vibrations and noise. In particular, the feet connected to the cabinet play a crucial role in damping the vibration of the cabinet. The common feet are composed of a screw and a fixing plate connected to the bottom of the screw. Generally, a rubber outer shell is sleeved on the fixing plate to achieve the functions of damping the feet and preventing the cabinet from sliding. However, the damping effect of the rubber outer shell is average, and large vibrations and noises still cannot be avoided during the operation of the clothing treatment device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the damping effect of the cabinet feet of existing devices that generate vibrations during operation is average. Therefore, a vibration damping component and a clothing treatment device with a better damping effect are provided.

[0004] The present invention aims to provide a vibration damping component for a device that generates vibrations during operation, including:

[0005] A foot, the foot having a cavity structure, and a phononic crystal structure being embedded in the cavity structure;

[0006] The phononic crystal structure includes multiple layers of different vibration damping units, and the multiple layers of different vibration damping units are configured to correspond to different vibration frequency bands of the device;

[0007] The multiple layers of different vibration damping units include a high-frequency damping disc and a low-frequency damping disc. A first phononic crystal microstructure for absorbing high-frequency vibrations is embedded in the high-frequency damping disc, and a second phononic crystal microstructure for absorbing low-frequency vibrations is embedded in the low-frequency damping disc.

[0008] In some embodiments, the multiple layers of different vibration damping units are configured to have different vibration damping material properties and / or pore structure sizes of phononic band gaps and / or pore arrangement modes of phononic band gaps and / or periodic lengths of pore arrangements of phononic band gaps, and each vibration damping unit corresponds to a specific vibration frequency band.

[0009] In some embodiments, a vibration absorption isolation layer is provided between the high-frequency damping disc and the low-frequency damping disc.

[0010] In some embodiments, a plurality of first holes are spaced apart on the high-frequency damping disc, and the first phononic crystal microstructure is embedded in the first holes;

[0011] A plurality of second holes are spacedly formed in the low-frequency vibration damping disc, and the second phononic crystal microstructure is embedded in the second holes;

[0012] Wherein, the resonance frequency of the first phononic crystal microstructure is higher than that of the second phononic crystal microstructure.

[0013] In some embodiments, the high-frequency vibration damping disc and the low-frequency vibration damping disc are made of high-density rigid materials;

[0014] The first phononic crystal microstructure and the second phononic crystal microstructure are made of low-density high-damping materials.

[0015] In some embodiments, the high-frequency vibration damping disc and the low-frequency vibration damping disc are arranged in the cavity structure from top to bottom in the vertical direction, and the volume of the first phononic crystal microstructure is smaller than that of the second phononic crystal microstructure.

[0016] In some embodiments, the first phononic crystal microstructure is configured as a cylinder or a sphere; the second phononic crystal microstructure is configured as a cylinder or a sphere.

[0017] In some embodiments, the vibration damping assembly further includes:

[0018] A connecting member, one end of the connecting member is connected to the high-frequency vibration damping disc, and the other end is used for connecting to the chassis of the device.

[0019] In some embodiments, the connecting member is configured as a screw, and a gasket is screwed on the connecting member, and the gasket is used for abutting against the chassis of the device.

[0020] In some embodiments, the gasket includes an abutting portion and a screwing portion arranged from top to bottom in the vertical direction, the abutting portion is connected to the upper end of the screwing portion, and the screwing portion is screwed on the outside of the connecting member.

[0021] In some embodiments, the foot is configured as a sleeve, and the foot wraps the outside of the high-frequency vibration damping disc, the low-frequency vibration damping disc and the vibration absorption and isolation layer.

[0022] In some embodiments, there is provided a laundry treatment device, including:

[0023] A chassis;

[0024] The above-mentioned vibration damping assembly, and the vibration damping assembly is arranged at the bottom of the chassis.

[0025] In some embodiments, there is provided a laundry treatment device, including:

[0026] A chassis;

[0027] The above damping assembly, wherein the connecting member is screwed to the bottom of the chassis and the bottom wall of the chassis abuts against the cushion body;

[0028] The connecting member is a rigid member.

[0029] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0030] The designed phononic crystal structure includes multiple damping units, and each damping unit corresponds to a specific vibration frequency band, achieving a wide-band damping effect, enabling effective local resonance in multiple vibration frequency bands, adapting to vibrations under different working conditions, and accurately regulating the frequency band gap according to the common frequencies of different models to improve the damping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts. In the drawings:

[0032] Figure 1 is a cross-sectional view of the damping assembly shown in an embodiment of the present invention;

[0033] Figure 2 is a front view of the damping assembly shown in an embodiment of the present invention;

[0034] Figure 3 is a partial exploded view of the damping assembly shown in an embodiment of the present invention;

[0035] Figure 4 is a top view of the high-frequency damping disc shown in an embodiment of the present invention;

[0036] Figure 5 is a top view of the low-frequency damping disc shown in an embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of the first phononic crystal microstructure shown in an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram of the second phononic crystal microstructure shown in an embodiment of the present invention;

[0039] Figure 8 is a band diagram of the damping assembly shown in an embodiment of the present invention.

[0040] In the figure: 1 - high-frequency vibration damping disc, 2 - low-frequency vibration damping disc, 3 - first hole, 4 - second hole, 5 - first phononic crystal microstructure, 6 - second phononic crystal microstructure, 7 - vibration absorption and isolation layer, 8 - connecting piece, 9 - cushion body, 901 - abutting part, 902 - screwed joint part, 10 - foot.

[0041] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Specific embodiments

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "contacted", "communicated" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In equipment that generates vibrations during operation, especially in laundry treatment equipment, the common foot at the lower end of the cabinet is composed of a screw and a fixed disc connected to the bottom of the screw. Generally, a rubber outer shell is sleeved on the fixed disc to achieve the functions of foot vibration damping and preventing the cabinet from sliding. However, the vibration damping effect of the rubber outer shell is average, and large vibrations and noises still cannot be avoided during the operation of the laundry treatment equipment.

[0045] Based on this technical problem, the following embodiments are proposed.

[0046] Embodiment 1

[0047] As Figure 1 、 3 -7 shows, this embodiment proposes a vibration damping assembly for equipment that generates vibrations during operation, including:

[0048] Foot 10, the foot 10 is a cavity structure, and a phononic crystal structure is embedded in the cavity structure;

[0049] The phononic crystal structure includes multiple layers of different vibration damping units, and the multiple layers of different vibration damping units are configured to correspond to different vibration frequency bands of the equipment.

[0050] In this embodiment, the device is a washing machine as an example for explanation. The phononic crystal structure is a composite material composed of two or more different materials arranged periodically. The periodic arrangement of these materials can form a specific vibration frequency band (band gap), so that sound waves or vibrations within certain frequency ranges are suppressed. The phononic crystal structure includes multiple layers of different vibration reduction units. It can be seen from the dynamic balance law of the washing machine suspension system that the lateral swing and up and down jumping of the vibration mode of the chassis caused by the drum are more likely to affect the user experience, and these two types of vibrations are usually most likely to cause vibration noise problems in the low-frequency speed-up stage (100-300rpm) and the high-frequency stable stage (about 800rpm). According to the vibration noise of the washing machine in the two frequency bands, two layers of vibration reduction units can be designed, and the resonant frequency of one of the vibration reduction units is designed to be a low-frequency vibration frequency band, and the resonant frequency of the other vibration reduction unit is designed to be a high-frequency vibration frequency band, so that the double-layer vibration reduction unit in the vibration reduction assembly as a whole can suppress different vibration frequency bands of the washing machine, and more specifically and comprehensively reduce the noise generated during the high-frequency or low-frequency operation of the washing machine.

[0051] According to the need for vibration reduction, more layers of vibration reduction units can be designed in the base 10 to suppress sound waves or vibrations in more frequency ranges.

[0052] More specifically, when the washing machine generates vibration during operation, the local resonance characteristics of the phononic crystal structure are activated. Preferably, the vibration reduction unit is made of a rigid material, such as a metal or ceramic material, and the microstructure in the vibration reduction unit is made of a low-density, high-damping material, such as air or lightweight plastic. When the local resonance characteristics of the phononic crystal structure are activated, relative displacement occurs between the air or lightweight plastic as the microstructure and the rigid material skeleton, thereby absorbing vibration energy. In addition, the phononic crystal structure itself can be optimized to design the phononic crystal structure into a multi-band vibration reduction structure, that is, a phononic crystal structure contains multiple vibration reduction units of different sizes and arrangements, each vibration reduction unit corresponds to a specific vibration frequency band, and a wide-band vibration reduction effect is achieved, so that it can achieve effective local resonance in multiple vibration frequency bands, adapt to vibrations under different working conditions, and can accurately adjust the frequency band gap according to the common frequencies of different models to improve the vibration reduction effect.

[0053] For the selection of phononic crystal structure materials, a combination of rigid materials and low-density materials is used, and the resonant frequency of the microstructure is adjusted by precisely controlling the material properties.

[0054] In addition to the above advantages, the vibration damping component proposed in this embodiment also has the advantages of environmental protection and energy conservation. It uses physical principles for vibration damping without the need for additional energy, which is environmentally friendly and energy-saving. Embedding the phononic crystal structure into the foot 10 results in a compact structure without adding extra space, facilitating installation and maintenance. This vibration damping component is not only applicable to washing machines but also can be applied to other household appliances and mechanical equipment that generate vibration during operation, having broad application prospects.

[0055] The bottom wall of the foot 10 contacts the ground, having an anti-slip function and at the same time providing a certain protection for the multi-layer vibration damping units inside to prevent them from being affected by the external environment.

[0056] Preferably, the multi-layer different vibration damping units are configured to have different vibration damping material properties and / or pore structure sizes of the phononic bandgap and / or pore arrangement modes of the phononic bandgap and / or periodic lengths of the pore arrangement of the phononic bandgap, and each vibration damping unit corresponds to a specific vibration frequency band.

[0057] The phononic crystal structure design adopts a multi-band design. By designing multiple microstructures with different sizes and arrangement modes, each vibration damping unit corresponds to a specific vibration frequency band, so as to effectively absorb vibration energy within multiple frequency bands, achieve multi-band vibration damping, and utilize the local resonance characteristics of the microstructures to ensure that vibration energy is effectively absorbed and converted within a specific frequency range, reducing the vibration and noise of the washing machine.

[0058] By adjusting the periodic length of the periodic arrangement of the microstructures of the multi-layer different vibration damping units, the bandgap position and width of the phononic crystal structure are precisely controlled to achieve resonance within the vibration frequency range generated when the washing machine is working. Arrangement mode: Adopt one-dimensional, two-dimensional or three-dimensional arrangement modes to optimize the wave propagation path and scattering characteristics and improve the vibration damping effect.

[0059] By combining rigid materials with low-density materials, selecting appropriate rigid materials such as metals and ceramics, and low-density materials such as air and lightweight plastics, the resonance frequency of the microstructures is adjusted by precisely controlling the material properties.

[0060] By designing multi-layer different vibration damping units, each layer having different periodic arrangements and material properties, more complex vibration frequency band control is achieved to improve the vibration damping effect.

[0061] In this embodiment, as Figure 1 、 3 、6, 7 show,

[0062] The multi-layer different vibration damping units include a high-frequency vibration damping disc 1 and a low-frequency vibration damping disc 2. The first phononic crystal microstructure 5 for absorbing high-frequency vibration is embedded in the high-frequency vibration damping disc 1, and the second phononic crystal microstructure 6 for absorbing low-frequency vibration is embedded in the low-frequency vibration damping disc 2;

[0063] Specifically, a plurality of first holes 3 are spacedly formed in the high-frequency vibration damping disc 1, and the first phononic crystal microstructure 5 is embedded in the first holes 3;

[0064] A plurality of second holes 4 are spacedly formed in the low-frequency vibration damping disc 2, and the second phononic crystal microstructure 6 is embedded in the second holes 4;

[0065] Wherein, the resonance frequency of the first phononic crystal microstructure 5 is higher than the resonance frequency of the second phononic crystal microstructure 6.

[0066] In this embodiment, the first holes 3 and the second holes 4 are respectively formed in the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2, which facilitates the first phononic crystal microstructure 5 and the second phononic crystal microstructure 6 to be respectively embedded in the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2, so as to form a double-layer vibration damping unit embedding structure. The resonance frequencies of the first phononic crystal microstructure 5 and the second phononic crystal microstructure 6 are designed to be different, so that the double-layer micro-embedding structure formed by the whole vibration damping component can suppress different vibration frequencies of the washing machine, and more comprehensively reduce the noise generated during the high-frequency operation or low-frequency operation of the washing machine.

[0067] In this embodiment, when the number of the first phononic crystal microstructures 5 is equal to the number of the first holes 3, the first phononic crystal microstructures 5 and the first holes 3 correspond one by one, that is, each first phononic crystal microstructure 5 is arranged in the corresponding first hole 3. When the number of the first phononic crystal microstructures 5 is less than the number of the first holes 3, for the introduction of local defects design, this design is to introduce local defects in the periodic arrangement of the first phononic crystal microstructures 5, such as missing one or several first phononic crystal microstructures 5, that is, there is at least one first hole 3 that is an empty nest, so as to cause local resonance of the high-frequency vibration damping disc 1 and form a new vibration frequency band within a specific frequency range, further improving the vibration damping effect.

[0068] Through the combined design of the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2, the whole vibration damping component is suitable for the high-frequency vibration and low-frequency vibration of the washing machine, and effectively reduces the noise generated by the high-frequency vibration and low-frequency vibration.

[0069] Optionally, in an implementation manner of this embodiment, as Figure 1 、 3 shown,

[0070] An absorption vibration isolation layer 7 is provided between the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2.

[0071] Such as Figure 1 、 3As shown, the provision of the vibration-absorbing insulation layer 7 further absorbs the vibration energy of the high-frequency vibration-damping disc 1 and the low-frequency vibration-damping disc 2 when they are in a vibrating state, and reduces the mutual interference between the high-frequency vibration-damping disc 1 and the low-frequency vibration-damping disc 2 when they are in a vibrating state, so that the two maintain effective vibration within their different vibration frequency bands, thereby having a stronger targeted suppression of vibrations in different frequency bands of the washing machine.

[0072] Optionally, in an implementation of this embodiment, as Figure 1 , 3 , 6, and 7,

[0073] The high-frequency vibration damping disk 1 and the low-frequency vibration damping disk 2 are arranged in the cavity structure from top to bottom along the vertical direction, and the volume of the first phononic crystal microstructure 5 is smaller than the volume of the second phononic crystal microstructure 6 .

[0074] In this embodiment, it can be known from the dynamic balance law of the washing machine suspension system that the lateral swing and up and down jumping of the chassis in the vibration mode caused by the drum will have a greater impact on the user experience, and these two types of vibrations are usually most likely to cause vibration noise problems in the low-frequency speed-up stage (100-300rpm) and the high-frequency stable stage (about 800rpm). The high-frequency vibration damping plate 1 and the low-frequency vibration damping plate 2 are designed to be arranged from top to bottom in the vertical direction, and the volume of the first phononic crystal microstructure 5 is smaller than that of the second phononic crystal microstructure 6. The first phononic crystal microstructure 5 has a smaller volume and has a higher The vibration frequency of the high-frequency vibration damping plate 1 makes the high-frequency vibration damping part, which can effectively suppress the high-frequency vibration. The high-frequency vibration damping plate 1 is designed to be located on the upper side, close to the chassis. Compared with the low-frequency vibration damping plate 2 which is closer to the ground, it is easier to generate high-frequency vibration and suppress the high-frequency vibration of the chassis. The second phononic crystal microstructure 6 has a larger volume and a lower vibration frequency, which makes the low-frequency vibration damping plate 2 a low-frequency vibration damping part, which can effectively suppress the low-frequency vibration. This design enables the vibration damping component as a whole to suppress the vibration of the washing machine more specifically and effectively reduce noise.

[0075] The high-frequency vibration damping plate 1 and the low-frequency vibration damping plate 2 are arranged from top to bottom in the vertical direction, which is closer to the washing machine and easier to generate the same high-frequency vibration as the washing machine. In the resonant state, the high-frequency vibration damping plate 1 can more effectively absorb and dissipate the vibration energy, thereby reducing the transmission of vibration and the impact on the washing machine, thereby achieving the best vibration damping effect. The low-frequency vibration damping plate 2 is closer to the ground, and its own vibration is easily suppressed by the ground. When the washing machine vibrates at a low frequency, it generates the same low-frequency vibration as the washing machine. In the resonant state, the high-frequency vibration damping plate 1 can more effectively absorb and dissipate the vibration energy, thereby reducing the transmission of vibration and the impact on the washing machine, thereby achieving the best vibration damping effect.

[0076] Optionally, in an implementation of this embodiment, as Figures 4 - 7As shown

[0077] The first phononic crystal microstructure 5 is configured as a cylinder or a sphere; the second phononic crystal microstructure 6 is configured as a cylinder or a sphere.

[0078] In this embodiment, the first phononic crystal microstructure 5 is a cylinder or a sphere, and the second phononic crystal microstructure 6 is a cylinder or a sphere, which are easy to form. The cylinder can be a cylinder or a square column. According to different working conditions of the washing machine, a cylinder or a sphere is selected as the vibration absorber. For example, compared with the cylindrical vibration absorber, the spherical vibration absorber can improve the vibration reduction effect from two-dimensional vibration reduction to three-dimensional vibration reduction, and can at least suppress the vibration caused by the vibration sources in three directions, achieving the vibration reduction effect of multiple degrees of freedom.

[0079] Preferably, the first phononic crystal microstructure 5 is a cylinder made of a low-density, high-damping lightweight plastic material or composite material. The aperture of the first hole 3 is 3 mm. The diameter size of the first phononic crystal microstructure 5 arranged inside it is adapted to the aperture of the first hole 3. The distance between adjacent first holes 3 is L1, and L1 = 6 mm; the second phononic crystal microstructure 6 is a cylinder made of a low-density, high-damping lightweight plastic material or composite material. The aperture of the second hole 4 is 4 mm. The diameter size of the second phononic crystal microstructure 6 arranged inside it is adapted to the aperture of the second hole 4. The distance between adjacent second holes 4 is L2, and L2 = 8 mm.

[0080] Perform a simulation experiment on the above vibration damping component. Figure 8 is the band diagram of the vibration damping component, from Figure 8 It can be seen that the vibration damping component shows a complete band gap near 55 Hz - 60 Hz, which can block the propagation of elastic waves in any direction in the plane. At the same time, there is also a band gap at 20 Hz - 25 Hz, which can block the propagation of elastic waves in a fixed direction. Therefore, the vibration damping component proposed in this embodiment can block the propagation of vibration waves within a certain range and has a good vibration damping effect.

[0081] Optionally, in an implementation manner of this embodiment, as Figure 1 、 3 shown

[0082] The high-frequency vibration damping disk 1, the low-frequency vibration damping disk 2, and the vibration absorption and isolation layer 7 are all configured as plate structures.

[0083] In this embodiment, the high-frequency vibration damping disk 1, the low-frequency vibration damping disk 2, and the vibration absorption and isolation layer 7 are all plate structures, and the three form an integral body, which is suitable for being used as the feet of the washing machine. A flexible connection can be adopted between the feet and the washing machine so that the whole vibration damping component has effective vibration.

[0084] Optionally, in an implementation manner of this embodiment, as Figures 1 - 3 shown

[0085] The vibration damping assembly further includes: a connecting member 8, one end of the connecting member 8 is connected to the high-frequency vibration damping disc 1, and the other end is used to connect to the chassis of the device.

[0086] In this embodiment, the setting of the connecting member 8 facilitates the establishment of a connection between the vibration damping assembly and the chassis of the device.

[0087] Optionally, in one implementation manner of this embodiment, as Figures 1 - 2 shown,

[0088] The connecting member 8 is configured as a screw, and a cushion body 9 is screwed on the connecting member 8, and the cushion body 9 is used to abut against the chassis of the device.

[0089] In this embodiment, by connecting the chassis of the device with the screw, the vibration damping assembly is integrally located at the lower end of the chassis to play a bearing role on the chassis. While the vibration damping assembly keeps the chassis stable, the bottom wall of the chassis abuts against the cushion body 9. The setting of the cushion body 9 increases the contact area between the screw and the bottom wall of the chassis, which helps to prevent the screw from loosening due to external factors such as vibration. At the same time, the cushion body 9 effectively avoids damage caused by excessive local pressure on the bottom wall of the chassis.

[0090] Further, the cushion body 9 includes an abutting portion 901 and a screwing portion 902 arranged from top to bottom in the vertical direction. The abutting portion 901 is connected to the upper end of the screwing portion 902, and the screwing portion 902 is screwed on the outside of the connecting member 8.

[0091] The screwing portion 902 is configured as a bolt, which is screwed on the screw, and the assembly is convenient. The bottom wall of the chassis abuts against the abutting portion 901. The setting of the abutting portion 901 increases the contact area between the screw and the bottom wall of the chassis, which helps to prevent the screw from loosening due to external factors such as vibration. At the same time, the abutting portion 901 shares the extrusion force of the bolt on the bottom wall of the chassis, effectively avoiding damage caused by excessive local pressure on the bottom wall of the chassis.

[0092] Optionally, in one implementation manner of this embodiment, as Figures 1 - 2 shown,

[0093] The foot 10 is configured as a sleeve, and the foot 10 wraps around the outside of the high-frequency vibration damping disc 1, the low-frequency vibration damping disc 2, and the vibration absorption and isolation layer 7.

[0094] In this embodiment, preferably, the foot 10 is an elastic rubber sleeve. The screw rod is integrally connected to the high-frequency vibration damping disc 1. The upper end of the screw rod is inserted into the bottom wall of the washing machine casing. Four vibration damping components are provided, and the four vibration damping components are respectively arranged at the four corners of the bottom wall of the casing. The screw rod can adjust the overall stability of the vibration damping components to level the washing machine casing. The bottom wall of the foot 10 contacts the ground, which has an anti-slip function and can also play a certain protective role for the inner high-frequency vibration damping disc 1, low-frequency vibration damping disc 2 and vibration absorption interlayer 7, avoiding the three from being affected by the external environment.

[0095] Embodiment Two

[0096] A laundry treatment device is provided in this embodiment, including:

[0097] A casing;

[0098] The vibration damping components in Embodiment One are arranged at the bottom of the casing. The connecting member 8 is screwed to the bottom of the casing and the bottom wall of the casing abuts against the cushion body 9.

[0099] In this embodiment, taking the laundry treatment device as a washing machine as an example for illustration, a first hole 3 and a second hole 4 are respectively opened on the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2, facilitating the first phononic crystal microstructure 5 and the second phononic crystal microstructure 6 to be respectively embedded on the high-frequency vibration damping disc 1 and the low-frequency vibration damping disc 2, so that the overall vibration damping components form a double-layer micro-embedded structure. The resonance frequencies of the first phononic crystal microstructure 5 and the second phononic crystal microstructure 6 are designed to be different, so that the double-layer micro-embedded structure formed by the overall vibration damping components can suppress different vibration frequencies of the washing machine, and comprehensively reduce the noise generated during the high-frequency operation or low-frequency operation of the washing machine. When the washing machine vibrates during operation, the local resonance characteristics of the phononic crystal structure are activated, and relative displacement occurs between the air or lightweight plastic cavities in the crystal microstructure and the rigid material framework, thereby absorbing the vibration energy. In addition, the phononic crystal structure itself can be optimized, and the phononic crystal structure can be designed into a multi-band vibration damping structure, that is, a phononic crystal contains multiple vibration damping units with different sizes and arrangements, and each unit corresponds to a specific vibration frequency band, realizing a wide-band vibration damping effect, enabling effective local resonance in multiple vibration frequency bands, adapting to vibrations under different working conditions, and accurately regulating the frequency band gap according to the common frequencies of different models to improve the vibration damping effect.

[0100] When the number of the first phononic crystal microstructures 5 and the first holes 3 are equal, the first phononic crystal microstructures 5 correspond to the first holes 3 one by one, that is, each first phononic crystal microstructure 5 is arranged in the corresponding first hole 3. When the number of the first phononic crystal microstructures 5 is less than the number of the first holes 3, a local defect design is adopted to introduce local defects in the periodic arrangement of the first phononic crystal microstructures 5, such as the lack of one or several first phononic crystal microstructures 5, that is, there is at least one first hole 3 that is an empty nest, so that the high-frequency vibration damping disk 1 produces local resonance, forms a new vibration frequency band within a specific frequency range, and further improves the vibration damping effect.

[0101] It can be seen from the dynamic balance law of the washing machine suspension system that the lateral swing and up and down jumping of the chassis in the vibration mode caused by the drum have a greater impact on the user experience. These two types of vibrations are usually most likely to cause vibration noise problems in the low-frequency speed-up stage (100-300rpm) and the high-frequency stable stage (about 800rpm). The high-frequency vibration damping plate 1 and the low-frequency vibration damping plate 2 are designed to be arranged from top to bottom in the vertical direction, and the volume of the first phononic crystal microstructure 5 is smaller than that of the second phononic crystal microstructure 6. The first phononic crystal microstructure 5 has a smaller volume and has a higher vibration The frequency makes the high-frequency vibration damping plate 1 a high-frequency vibration damping part, which can effectively suppress high-frequency vibrations. The high-frequency vibration damping plate 1 is designed to be located on the upper side, close to the chassis. Compared with the low-frequency vibration damping plate 2 which is closer to the ground, it is easier to generate high-frequency vibrations and suppress the high-frequency vibrations of the chassis. The second phononic crystal microstructure 6 is larger in volume and has a lower vibration frequency, which makes the low-frequency vibration damping plate 2 a low-frequency vibration damping part, which can effectively suppress low-frequency vibrations. This design enables the vibration damping component as a whole to suppress the vibration of the washing machine more specifically and effectively reduce noise.

[0102] The chassis is connected through the screw device, so that the vibration reduction assembly is located at the lower end of the chassis as a whole to bear the load on the chassis. While the vibration reduction assembly keeps the chassis stable, the bottom wall of the chassis abuts against the pad 9. The abutting portion 901 is a gasket structure, which increases the contact area between the screw and the bottom wall of the chassis, and helps prevent the screw from loosening due to external factors such as vibration. At the same time, the abutting portion 901 shares the squeezing force of the bolt on the bottom wall of the chassis, effectively avoiding damage to the bottom wall of the chassis due to excessive local pressure.

[0103] The screw and the high-frequency vibration damping plate 1 are integrally connected, and the upper end of the screw is inserted into the bottom wall of the washing machine chassis. Four vibration damping components are provided, and the four vibration damping components are respectively arranged at the four corners of the bottom wall of the chassis. The screw can adjust the overall stability of the vibration damping component to level the washing machine chassis. The bottom wall of the base foot 10 is in contact with the ground and has an anti-slip function. At the same time, it has a certain protective effect on the inner high-frequency vibration damping plate 1, the low-frequency vibration damping plate 2 and the vibration absorbing insulation layer 7 to prevent the three from being affected by the external environment.

[0104] In summary, the ingenious concept of the vibration damping component lies in:

[0105] First, the phononic crystal structure is designed to include multiple layers of vibration damping units. Each vibration damping unit corresponds to a specific vibration frequency band, achieving a wide-band vibration damping effect. It can achieve effective local resonance within multiple vibration frequency bands, adapt to vibrations under different working conditions, and can accurately adjust the frequency band gap according to the common frequencies of different models, improving the vibration damping effect.

[0106] Second, the first hole and the second hole are respectively opened on the high-frequency vibration damping disk and the low-frequency vibration damping disk, facilitating the embedding of the first phononic crystal microstructure and the second phononic crystal microstructure into the high-frequency vibration damping disk and the low-frequency vibration damping disk respectively, forming a double-layer micro-embedding structure. The resonance frequencies of the first phononic crystal microstructure and the second phononic crystal microstructure are designed to be different, enabling the overall vibration damping component to suppress different vibration frequencies of the washing machine and comprehensively reduce the noise generated during the high-frequency or low-frequency operation of the washing machine. When the washing machine vibrates during operation, the local resonance characteristics of the phononic crystal structure are activated, and relative displacement occurs between the air or lightweight plastic cavities in the crystal microstructure and the rigid material skeleton, thereby absorbing vibration energy. In addition, by optimizing the phononic crystal structure itself, the phononic crystal structure can be designed into a multi-band vibration damping structure, that is, a phononic crystal contains multiple vibration damping units with different sizes and arrangements. Each unit corresponds to a specific vibration frequency band, achieving a wide-band vibration damping effect. It can achieve effective local resonance within multiple vibration frequency bands, adapt to vibrations under different working conditions, and can accurately adjust the frequency band gap according to the common frequencies of different models, improving the vibration damping effect. In addition to the above advantages, the vibration damping component also has the advantages of environmental protection and energy conservation. It uses physical principles for vibration damping without additional energy, which is environmentally friendly and energy-saving. Embedding the phononic crystal structure into the vibration damping part makes the structure compact without increasing extra space, facilitating installation and maintenance. This vibration damping component is not only applicable to washing machines but also can be applied to other household appliances, mechanical equipment, etc. that generate vibrations during operation, having a wide application prospect.

[0107] Third, the high-frequency vibration damping disk and the low-frequency vibration damping disk are designed to be arranged vertically from top to bottom, and the volume of the first phononic crystal microstructure is smaller than that of the second phononic crystal microstructure. The first phononic crystal microstructure has a smaller volume and a higher vibration frequency, making the high-frequency vibration damping disk a high-frequency vibration damping part, which can effectively suppress high-frequency vibrations. The high-frequency vibration damping disk is designed to be located on the upper side, close to the chassis. Compared with the low-frequency vibration damping disk that is closer to the ground, it is more likely to generate high-frequency vibrations and suppress the high-frequency vibrations of the box. The second phononic crystal microstructure has a larger volume and a lower vibration frequency, making the low-frequency vibration damping disk a low-frequency vibration damping part, which can effectively suppress low-frequency vibrations. This design enables the overall vibration damping component to more specifically suppress the vibrations of the washing machine and effectively reduce noise.

[0108] Fourth, the microstructure of the first phononic crystal is a cylinder or a sphere, and the microstructure of the second phononic crystal is a cylinder or a sphere, which is easy to be formed. The cylinder can be a cylinder or a square column. According to different working conditions of the washing machine, a cylinder or a sphere is selected as the vibration absorber. For example, compared with the cylindrical vibration absorber, the spherical vibration absorber can improve the vibration reduction effect from two-dimensional vibration reduction to three-dimensional vibration reduction, and can at least suppress the vibration caused by the vibration sources in three directions, realizing the vibration reduction effect of multiple degrees of freedom.

[0109] Fifth, the setting of the vibration absorption and isolation layer further absorbs the vibration energy of the high-frequency vibration reduction disc and the low-frequency vibration reduction disc in the vibration state, and reduces the mutual interference between the high-frequency vibration reduction disc and the low-frequency vibration reduction disc in the vibration state, so that the two maintain effective vibration in their different vibration frequency bands, and thus has stronger pertinence to the suppression of the vibration of different frequency bands of the washing machine.

[0110] It can be further understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the" and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0111] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0112] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that it is required to perform these operations in the specific order or serial order shown, or to perform all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be beneficial.

[0113] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known or customary technical means in the art not disclosed herein. The specification and examples are only illustrative, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0114] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A vibration reduction assembly for a clothes processing device, characterized in that: include: A base (10), the base (10) being a cavity structure, wherein a phononic crystal structure is embedded in the cavity structure; The phononic crystal structure includes multiple layers of different vibration reduction units, and the multiple layers of different vibration reduction units are configured to correspond to different vibration frequency bands of the device; The multiple layers of different vibration damping units include a high-frequency vibration damping disk (1) and a low-frequency vibration damping disk (2), wherein a first phononic crystal microstructure (5) for absorbing high-frequency vibrations is embedded in the high-frequency vibration damping disk (1), and a second phononic crystal microstructure (6) for absorbing low-frequency vibrations is embedded in the low-frequency vibration damping disk (2); The high-frequency vibration damping disc (1) and the low-frequency vibration damping disc (2) are arranged in the cavity structure from top to bottom along the vertical direction, the high-frequency vibration damping disc (1) is located on the upper side, and the low-frequency vibration damping disc (2) is located on the lower side.

2. The vibration reduction assembly according to claim 1, characterized in that: The multiple layers of different vibration damping units are constructed to have different vibration damping material properties and / or pore structure sizes of phonon band gaps and / or pore arrangement modes of phonon band gaps and / or period lengths of pore arrangement of phonon band gaps, and each vibration damping unit corresponds to a specific vibration frequency band.

3. The vibration reduction assembly according to claim 1, characterized in that: A vibration absorbing insulating layer (7) is provided between the high-frequency vibration damping disc (1) and the low-frequency vibration damping disc (2).

4. The vibration reduction assembly according to claim 3, characterized in that: The high-frequency vibration damping disk (1) is provided with a plurality of first holes (3) at intervals, and the first phononic crystal microstructure (5) is embedded in the first holes (3); A plurality of second holes (4) are provided at intervals on the low-frequency vibration damping disk (2), and the second phononic crystal microstructure (6) is embedded in the second hole (4); Wherein, the resonance frequency of the first phononic crystal microstructure (5) is higher than the resonance frequency of the second phononic crystal microstructure (6).

5. The vibration reduction assembly according to claim 4, characterized in that: The high-frequency vibration damping disc and the low-frequency vibration damping disc are made of high-density rigid material; The first phononic crystal microstructure (5) and the second phononic crystal microstructure (6) are made of low-density high-damping material.

6. The vibration reduction assembly according to claim 4, characterized in that: The volume of the first phononic crystal microstructure (5) is smaller than the volume of the second phononic crystal microstructure (6).

7. The vibration reduction assembly according to any one of claims 3 to 6, characterized in that: The vibration reduction assembly also includes: A connecting piece (8), one end of the connecting piece (8) is connected to the high-frequency vibration damping disk (1), and the other end is used to be connected to the chassis of the device.

8. The vibration reduction assembly according to claim 7, characterized in that: The connecting member (8) is constructed as a screw rod, and a pad body (9) is screwed onto the connecting member (8), and the pad body (9) is used to abut against a chassis of the device.

9. The vibration reduction assembly according to claim 8, characterized in that: The pad body (9) comprises a supporting portion (901) and a screw-connecting portion (902) arranged from top to bottom in the vertical direction, the supporting portion (901) being connected to the upper end of the screw-connecting portion (902), and the screw-connecting portion (902) being screw-connected to the outer side of the connecting member (8).

10. The vibration reduction assembly according to claim 3, characterized in that: The base foot (10) is constructed as a sleeve, and the base foot (10) is wrapped around the outside of the high-frequency vibration damping disc (1), the low-frequency vibration damping disc (2) and the vibration absorbing insulation layer (7).

11. A clothes processing device, characterized in that: include: Chassis; The vibration damping assembly according to any one of claims 1-7 and 10, wherein the vibration damping assembly is arranged at the bottom of the chassis.

12. A clothes processing device, characterized in that: include: Chassis; The vibration reduction assembly according to claim 8 or 9, wherein the connecting member (8) is screwed to the bottom of the chassis and the bottom wall of the chassis abuts against the pad (9); The connecting member (8) is a rigid member.

Images