Foot pad assembly, control method of foot pad assembly and compressor device

Abstract

The invention provides a foot pad assembly, a control method of the foot pad assembly and a compressor device, and belongs to the technical field of compressor vibration reduction. The foot pad assembly comprises a coil assembly and a foot pad, wherein the coil assembly comprises a positioning column and a coil wound on the positioning column; the foot pad comprises an elastic supporting body arranged on the periphery of the coil assembly in a sleeving mode and a magnetic material arranged in the elastic supporting body. The magnetic material can generate a preset change under the condition that the coil is electrified, so that the hardness of the foot pad is changed, and the preset change comprises at least one of position change and viscosity change. According to the scheme provided by the invention, the structural design is reasonable, and the hardness of the compressor can be adaptively adjusted when the compressor operates at low frequency, so that vibration and resonance of the compressor are effectively inhibited, vibration and stress of a connected pipeline are reduced, fatigue fracture of the pipeline is avoided, and the reliability of a compressor device is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor vibration reduction, and in particular relates to a foot pad assembly, a control method for the foot pad assembly, and a compressor device. Background Art

[0002] Compressors are currently widely used in refrigeration, air conditioning, industrial gas supply, and other fields. During operation, the high-speed movement of internal components such as the piston and scroll wheel generates significant mechanical vibration and noise. To reduce the impact of vibration transmission to the ground or other structures, rubber pads are often installed on the bottom of the compressor to absorb some of the vibration energy generated by the compressor. These pads are generally made of materials such as silicone, EPDM, and butyl rubber, and have a relatively fixed hardness. To improve the overall noise performance of the compressor, pads with a lower hardness are usually selected to reduce the transmission of vibration to the outside world.

[0003] To meet the diverse needs of users and adapt to the trend of intelligent products, variable-frequency compressors are currently widely used in various fields. Variable-frequency compressors typically operate within a wide frequency range, automatically adjusting the operating frequency based on changes in the system's load to accurately adapt to load changes. When a variable-frequency compressor is in the process of increasing or decreasing the frequency, it will experience multiple resonant frequency points in the compressor piping system. Near these resonant frequency points, the vibration of the compressor and piping will suddenly change. Mechanical vibrations are generally greater at relatively high-frequency operation, and the rigid-body modes of the compressor are easily excited, leading to resonance. When using foot pads with lower hardness, the foot pads will deform significantly and cannot effectively suppress the mechanical vibration of the compressor, causing vibration and increased local stress in the piping, ultimately leading to fatigue fracture of the piping.

[0004] To solve the above problems, the existing technologies often set up a cavity structure inside the pad, filling it with gas, liquid or other substances to change the hardness of the pad, so that the pad is generally only suitable for certain working conditions, such as the transportation process or start-up and shutdown conditions of the compressor. In summary, the current compressor pads have the following shortcomings: 1. The hardness of the foot pad cannot be adjusted in real time. The foot pad can only be adjusted for specific working conditions or frequencies. It is difficult to adapt to the hardness requirements of different working conditions such as compressor startup, operation, and shutdown.

[0005] 2. The filling material is easily affected by the ambient temperature, humidity, etc., and the material of the foot pad itself ages over time, resulting in unstable vibration reduction performance. Summary of the Invention

[0006] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies and propose a foot pad assembly, a control method for the foot pad assembly, and a compressor device, aiming to solve the problems of large vibration and resonance in existing compressors when running at low frequencies, the foot pad filling being easily affected by factors such as ambient temperature and self-aging, and unstable vibration reduction performance.

[0007] The present invention provides a foot pad assembly, including a coil assembly and a foot pad, the coil assembly including a positioning column and a coil wound on the positioning column; the foot pad including an elastic support body sleeved on the periphery of the coil assembly, and a magnetic material arranged inside the elastic support body; the magnetic material is arranged on the periphery of the coil assembly along the radial direction of the coil assembly; the magnetic material can produce a preset change when the coil is energized, so that the hardness of the foot pad changes, and the preset change includes at least one of a position change and a viscosity change.

[0008] Furthermore, the magnetic material includes a magnetic body. When the coil is energized, the magnetic body changes position to press the elastic support body, thereby changing the hardness of the foot pad.

[0009] Furthermore, there are multiple magnetic bodies, and the multiple magnetic bodies are distributed inside the elastic support body along the circumferential direction of the coil assembly.

[0010] Furthermore, a plurality of magnetic bodies distributed along the circumference of the coil assembly form a magnetic ring, and in the axial direction of the coil assembly, the magnetic ring is provided in at least two layers.

[0011] Furthermore, an annular protrusion is provided on the outer surface of the elastic support body, and the annular protrusion corresponds to the magnetic body.

[0012] Furthermore, the magnetic material includes magnetorheological particles. When the coil is energized, the magnetorheological particles produce a viscosity change, thereby changing the hardness of the foot pad.

[0013] Furthermore, the magnetorheological particles are evenly distributed inside the elastic support body along the circumference of the coil assembly.

[0014] Furthermore, a groove arranged around the coil is opened inside the elastic support body, and an accommodating cavity is formed between the groove and the positioning column, and the coil is located in the accommodating cavity.

[0015] Accordingly, the present invention further provides a method for controlling a foot pad assembly, wherein the foot pad assembly is the foot pad assembly provided in the embodiment of the first aspect, and the foot pad assembly is used to be arranged between a compressor and a support surface, and the method comprises the following steps: S102: In response to a preset vibration frequency of the compressor, applying a preset current to the coil in the foot pad assembly, where the preset current matches the preset vibration frequency.

[0016] Correspondingly, the present invention also provides a compressor device, comprising a compressor and a foot pad assembly provided by the embodiment of the first aspect, wherein the foot pad assembly is used to be arranged between the compressor and a support surface.

[0017] Furthermore, the compressor device also includes a controller, which is used to execute the control method of the foot pad assembly provided in the embodiment of the second aspect.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: (1) The present invention provides a foot pad assembly, a control method for the foot pad assembly, and a compressor device, which can adaptively adjust its own hardness when the compressor is running at a low frequency, thereby effectively suppressing the vibration and resonance of the compressor, reducing the vibration and stress of the connected pipelines, avoiding fatigue and rupture of the pipelines, and improving the reliability of the compressor device. It solves the problems of existing compressors that vibrate greatly and resonate when running at a low frequency, the foot pad filling is easily affected by factors such as ambient temperature and self-aging, and the vibration reduction performance is unstable.

[0019] (2) The present invention provides a foot pad assembly in which a controllable magnetic field is set inside the foot pad. The magnetic field generated by the coil being energized exerts an effect on the magnetic material, causing the magnetic material to change position or viscosity, thereby adjusting the hardness of the elastic support body in real time.

[0020] (3) The magnetic body and coil of the foot pad assembly provided by the present invention adopt standard electromagnetic components, which are simple in structure and easy to integrate. The overall structure is still compatible with the existing compressor installation method without changing the original equipment architecture, and has good engineering feasibility and product promotion.

[0021] (4) Among them, the present invention provides a control method for a foot pad assembly, which identifies the resonant frequency point by combining the compressor vibration test data and accurately applies the corresponding current at the resonant frequency point to improve the hardness of the foot pad, effectively suppress the vibration peak in the resonant state, and significantly improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention will be further described below with reference to the accompanying drawings: Figure 1 is a schematic cross-sectional view of an embodiment of a foot pad assembly of the present invention; Figure 2 Schematic diagram of the structure of an embodiment of the magnetic body of the present invention; Figure 3 This is a flow chart of a control method for a foot pad assembly according to the present invention; Figure 4 This is a schematic structural diagram of an embodiment of a compressor device of the present invention; Figure 5 Schematic diagram comparing vibration amplitudes of an embodiment of a foot pad assembly of the present invention applied to a compressor device.

[0024] In the figure: 1 positioning column, 2 coil, 3 elastic support body, 4 magnetic body, 5 annular protrusion, 6 accommodating cavity, 7 compressor, 8 support surface, 9 positioning nut. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0026] Throughout the specification and claims, the following terms have at least the meanings explicitly associated herein, unless the context dictates otherwise. The meanings identified below do not necessarily limit the terms, but merely provide illustrative examples of the terms.

[0027] In the description of the present invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments", as used herein, when used multiple times, does not necessarily refer to the same embodiment, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or" unless the context clearly dictates otherwise. The term "based on" is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise. The word "exemplary" means "serving as an example, instance or illustration" in this article. Any embodiment described herein as "exemplary" is not necessarily to be construed as being superior or preferred to other embodiments. The scope of the present invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely to set forth some of the many possible embodiments of the claimed invention. The various embodiments provided by the present invention should not be construed as limiting the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 should not be understood as limiting the present invention.

[0029] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0030] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] like Figure 1 As shown, an embodiment of the first aspect of the present invention provides a foot pad assembly, including a coil assembly and a foot pad. The coil assembly includes a positioning post 1 and a coil 2 wound on the positioning post 1, the positioning post 1 is made of metal material, and the coil 2 is electrically connected to an external power supply for energizing the coil 2. The foot pad includes an elastic support body 3 sleeved on the periphery of the coil assembly, and a magnetic material arranged inside the elastic support body 3. It should be noted that the magnetic material is arranged inside the elastic support body 3, and it should be understood that the magnetic material is filled inside the elastic support body 3, and will not occupy additional space outside the elastic support body 3, and will not occupy additional dimensions outside the elastic support body 3. For example, the elastic support body 3 is made by mold molding. When making the elastic support body 3, the magnetic material is first placed in the mold cavity, and then the elastic material is injected into the mold cavity so that the magnetic material is filled inside the elastic support body 3.

[0033] In addition, the elastic support body 3 is sleeved on the periphery of the coil assembly, and the magnetic material 4 is filled in the elastic support body 3. Therefore, the magnetic material is arranged on the periphery of the coil assembly along the radial direction of the coil assembly.

[0034] The magnetic material can undergo a predetermined change when coil 2 is energized, thereby changing the hardness of the foot pad and adaptively adjusting the support force on compressor 7. The predetermined change includes at least one of a position change and a viscosity change. Exemplarily, the magnetic material is disposed radially around the coil assembly. Therefore, the position change of the magnetic material includes a position change of the magnetic material along the radial direction of the coil assembly.

[0035] The present invention provides a foot pad assembly with a reasonable structural design. It can adaptively adjust its own hardness when the compressor 7 is running at a low frequency, thereby effectively suppressing the vibration and resonance of the compressor 7, reducing the vibration and stress of the connected pipelines, avoiding pipeline fatigue and rupture, and improving the reliability of the compressor device. It solves the problems of the existing compressor 7 vibrating violently and generating resonance when running at a low frequency, the foot pad filling being easily affected by factors such as ambient temperature and self-aging, and the unstable vibration reduction performance.

[0036] Specifically, when the coil 2 is energized, the coil assembly can generate a concentrated magnetic field along the axial direction of the positioning column 1. The magnetic field acts on the magnetic material, causing the magnetic material to undergo a preset change, thereby changing the hardness of the foot pad. For example, when the preset change is a position change, the position change of the magnetic material along the radial direction of the coil assembly will cause the foot pad to undergo controlled deformation in the radial direction of the coil assembly, thereby changing the hardness of the foot pad. When the coil 2 is not energized, the magnetic material is not affected by the magnetic field, the foot pad assembly is at its initial hardness, and maintains a static equilibrium state with the elastic support body 3, without changing the original physical properties of the elastic support body 3.

[0037] The specific shape and material of the elastic support body 3 are not limited here, and it only needs to achieve the supporting function for the foundation of the compressor 7. Preferably, the elastic support body 3 is a cylindrical structure, is sleeved on the positioning column 1 along the axial direction of the positioning column 1, and is made of rubber material.

[0038] Preferably, in combination with the above scheme, Figures 1 to 2 As shown, as an embodiment of the present invention, the magnetic material includes a magnetic body 4. When the coil 2 is energized, the magnetic body 4 changes its position to squeeze the elastic support body 3, so that the hardness of the foot pad changes, and the supporting force on the compressor 7 can be adaptively adjusted.

[0039] Specifically, coil 2 is energized to generate a magnetic field. The magnetic force causes the magnetic block to shift position, squeezing elastic support 3 toward the outside or inside of the footpad. This compresses and squeezes the area surrounding the magnetic block. Because elastic materials like rubber are sensitive to compression, the internal stress changes in elastic support 3 caused by the magnetic block directly increase the hardness (rigidity) of the footpad, thereby increasing its support for compressor 7.

[0040] Preferably, in combination with the above scheme, Figure 1 As shown, as an embodiment of the present invention, there are multiple magnetic bodies 4, and the multiple magnetic bodies 4 are distributed along the circumference of the coil assembly inside the elastic support body 3, so that under the coordinated action of the multiple magnetic bodies 4, the elastic support body 3 can produce uniform deformation in the circumferential direction along the coil assembly.

[0041] The specific shape, size and number of the magnetic body 4 are not limited here. It only needs to change the hardness of the elastic support body 3 by changing the position, and can be set according to the specific size of the elastic support body 3.

[0042] Preferably, in some possible embodiments, in order to ensure that the elastic support body 3 produces uniform deformation when subjected to magnetic field force, four magnetic bodies 4 are arranged inside the elastic support body 3 and are symmetrically distributed along the left and right sides of the elastic support body 3; the magnetic bodies 4 are made of a material with high magnetic permeability, such as a magnet block.

[0043] Preferably, in combination with the above scheme, Figure 1 As shown in FIG. , as one embodiment of the present invention, a plurality of magnetic bodies 4 distributed circumferentially along the coil assembly form a magnetic ring, which enables the elastic support body 3 to produce uniform deformation along the circumferential direction of the coil assembly. In the axial direction of the coil assembly, the magnetic ring is provided in at least two layers, which enables the elastic support body 3 to produce uniform deformation along the axial direction of the coil assembly, thereby adaptively adjusting the supporting force on the compressor 7.

[0044] Preferably, in combination with the above scheme, Figure 1 As shown, as an embodiment of the present invention, the outer surface of the elastic support body 3 is provided with an annular protrusion 5, which corresponds to the magnetic body 4 and can increase the deformation range of the elastic support body 3, thereby making the support force adjustment range of the foot pad assembly on the compressor 7 larger.

[0045] Preferably, in combination with the above scheme, as an embodiment of the present invention, the magnetic material includes magnetorheological particles. When the coil 2 is energized, the magnetorheological particles produce a viscosity change, so that the hardness of the foot pad changes, and the support force for the compressor 7 can be adaptively adjusted.

[0046] Specifically, in the absence of a magnetic field, the magnetorheological particles exhibit liquid or semi-solid properties. When subjected to a magnetic field, the viscosity of the magnetorheological particles rapidly increases, resulting in solid-like properties. When coil 2 is energized to generate a magnetic field, the magnetorheological particles undergo a phase change under the influence of the magnetic field, resulting in a change in viscosity, which in turn alters the hardness of elastic support 3.

[0047] It can be understood that when the viscosity of the magnetorheological particles is used to change the support hardness of the foot pad, compared to changing the position of the magnetic body 4, the mechanical deformation of the elastic support body 3 caused by the position change of the magnetic body 4 can be avoided, simplifying the structure of the foot pad assembly and improving the response speed and control accuracy. Furthermore, foot pad assemblies using magnetorheological particles as the magnetic material are suitable for applications with more demanding response times, such as industrial refrigeration equipment or vibration damping devices for precision instruments.

[0048] Preferably, in combination with the above solution, as an embodiment of the present invention, magnetorheological particles are evenly distributed inside the elastic support body 3 along the circumference of the coil assembly, so that under the action of the magnetorheological particles, the elastic support body 3 can produce uniform hardness changes.

[0049] Preferably, in combination with the above scheme, Figure 1 As shown, as an embodiment of the present invention, a groove is opened inside the elastic support body 3 and arranged around the coil 2, and an accommodating cavity 6 is formed between the groove and the positioning column 1. The coil 2 is located in the accommodating cavity 6, so that when the coil 2 is energized, the coil assembly can generate a concentrated magnetic field along the axial direction of the positioning column 1, and the magnetic field is mainly concentrated inside the coil 2.

[0050] like Figure 3 As shown, an embodiment of the second aspect of the present invention provides a control method for a foot pad assembly, wherein the foot pad assembly is the foot pad assembly provided by the embodiment of the first aspect, and the foot pad assembly is used to be arranged between the compressor 7 and the support surface 8. In the compressor device, the compressor 7 is located at the top of the device and is the main vibration source; the support surface 8 is located at the bottom of the compressor device and is usually a part of the compressor 7 housing or the installation platform below the compressor 7, which serves to support the compressor device. The control method of the foot pad assembly includes the following steps: S102: During the operation of compressor 7, a main control system (such as an MCU or DSP) detects whether the current vibration frequency of compressor 7 is within a preset vibration frequency. When compressor 7 is at the preset vibration frequency, the main control system applies a preset current to coil 2 in the foot pad assembly in response to the preset vibration frequency of compressor 7, and the preset current matches the preset vibration frequency. When compressor 7 is at a non-preset vibration frequency, the main control system reduces or shuts off the current, and the foot pad assembly returns to its initial flexible state, thereby achieving dynamic and continuous adjustment of the foot pad assembly's hardness.

[0051] The present invention provides a control method for a foot pad assembly, which can adaptively adjust its own hardness when the compressor 7 is running at a low frequency, thereby effectively suppressing the vibration and resonance of the compressor 7, reducing the vibration and stress of the connected pipelines, avoiding fatigue and rupture of the pipelines, and improving the reliability of the compressor device. It solves the problems of large vibration and resonance of the existing compressor 7 when running at a low frequency, the foot pad filling being easily affected by factors such as ambient temperature and self-aging, and the unstable vibration reduction performance.

[0052] Among them, when a preset current is applied to the coil 2 in the foot pad assembly, the current size can be adjusted in real time by the main control system, and combined with the current frequency of the compressor 7 obtained through feedback control, the required hardness of the foot pad assembly can be adaptively matched, thereby realizing electromagnetically controllable adjustment of the hardness of the foot pad assembly and reducing the vibration amplitude of the compressor 7 and the connected pipeline when they are at the preset vibration frequency.

[0053] The preset vibration frequency of the compressor 7 can be obtained through vibration experiments during the product development phase of the compressor 7. Specifically, the resonance frequency points F1, F2, F3, ..., F of the compressor 7 during the frequency increase and decrease process are obtained. n , the vibration frequency of the compressor 7 when it is at the resonance frequency point is used as the preset vibration frequency of the compressor 7.

[0054] The preset current matching the preset vibration frequency can be obtained by the following method: First, a certain number of sample current values ​​a1, a2, a3, ... a m When the vibration frequency of the compressor 7 is at the current resonance frequency point, according to the current values ​​a1, a2, a3...a m Current is applied to coil 2 in sequence, so that the foot pad assembly is at different support hardness. Then the vibration amplitude of compressor 7 corresponding to different current values ​​is analyzed, and the current value that minimizes the vibration amplitude of compressor 7 is selected as the preset current A at the current resonance frequency point. n Repeat the above process to obtain the preset currents A1, A2, A3, ... A at all resonant frequency points in turn. n .

[0055] It can be understood that when the compressor 7 is at the resonant frequency point, increasing the current to increase the hardness of the foot pad can suppress the amplification effect of the resonance phenomenon on the vibration, thereby avoiding excessive local stress in the pipeline and extending the service life; when the compressor 7 is at the non-resonant frequency point, reducing the current so that the foot pad maintains a lower hardness, can improve the vibration isolation efficiency of the foot pad and reduce the energy transmitted to the support surface 8 by vibration.

[0056] like Figure 4As shown, an embodiment of a third aspect of the present invention provides a compressor device, comprising a compressor 7 and the foot pad assembly provided in the embodiment of the first aspect, the foot pad assembly being arranged between the compressor 7 and a support surface 8. The compressor device provided by the present invention can effectively suppress vibration and resonance through the foot pad assembly, reduce vibration and stress in connected pipelines, avoid pipeline fatigue rupture, and improve the reliability of the compressor device.

[0057] Specifically, a plurality of mounting posts are vertically arranged on the support surface 8, and a plurality of mounting holes are provided at the bottom of the compressor 7. The mounting posts are passed through the mounting holes and are fitted with positioning nuts 9 at the tops, thereby securing the compressor 7 to the support surface 8. The scope of application of the compressor device provided by the present invention is not limited here, and can be applied to heat pump-based washer-dryers, air conditioners, dehumidifiers, water heaters, and other electrical appliances.

[0058] In some possible embodiments, the mounting column on the support surface 8 serves as the positioning column 1 of the foot pad assembly, the foot pad is sleeved on the outside of the mounting column, and the positioning nut 9 fastens the foot pad between the compressor 7 and the support surface 8 to ensure close contact and prevent loosening, thereby transmitting the vibration of the compressor 7 during operation to the support surface 8 through the foot pad assembly.

[0059] Preferably, in combination with the above solution, as an embodiment of the present invention, the compressor device further includes a controller, which is used to execute the control method of the foot pad assembly provided by the embodiment of the second aspect. Specifically, when the control method of the foot pad assembly is executed by the controller on the foot pad assembly of the compressor device, a schematic diagram comparing the frequency and vibration amplitude of the foot pad assembly provided by the present invention and that of an ordinary foot pad is shown as follows: Figure 5 As shown, the foot pad assembly provided by the present invention has a significant effect in suppressing vibration and resonance.

[0060] In the above embodiments of the present application, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The steps shown in the relevant flow charts can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flow charts, in some cases, the steps shown or described can be executed in an order different from that shown here. In other words, the order of steps described in the foregoing embodiments is only an example, and reasonable adjustment of the order of steps based on the content of the embodiments of the present application is also within the scope of protection of the embodiments of the present application.

[0061] The sequence of the serial numbers or introduction of the embodiments of this application is for description only and does not represent the superiority or inferiority of the embodiments.

[0062] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A foot pad assembly, characterized in that: include: A coil assembly, comprising a positioning post (1) and a coil (2) wound around the positioning post (1); A foot pad, comprising an elastic support body (3) sleeved on the periphery of the coil assembly, and a magnetic material arranged inside the elastic support body (3); the magnetic material is arranged on the periphery of the coil assembly along the radial direction of the coil assembly; The magnetic material can produce a preset change when the coil (2) is energized, so that the hardness of the foot pad changes, and the preset change includes at least one of a position change and a viscosity change.

2. The foot pad assembly according to claim 1, characterized in that The magnetic material includes a magnetic body (4). When the coil (2) is energized, the magnetic body (4) changes position to press the elastic support body (3), thereby changing the hardness of the foot pad.

3. The foot pad assembly according to claim 2, characterized in that: There are multiple magnetic bodies (4), and the multiple magnetic bodies (4) are distributed inside the elastic support body (3) along the circumference of the coil assembly.

4. The foot pad assembly according to claim 3, characterized in that: A plurality of magnetic bodies (4) distributed along the circumference of the coil assembly form a magnetic ring, and in the axial direction of the coil assembly, the magnetic ring is arranged in at least two layers.

5. The foot pad assembly according to claim 4, characterized in that: An annular protrusion (5) is provided on the outer surface of the elastic support body (3), and the annular protrusion (5) corresponds to the magnetic body (4).

6. The foot pad assembly according to claim 1, characterized in that The magnetic material includes magnetorheological particles. When the coil (2) is energized, the magnetorheological particles produce a viscosity change, causing the hardness of the foot pad to change.

7. The foot pad assembly according to claim 6, characterized in that: The magnetorheological particles are evenly distributed inside the elastic support body (3) along the circumference of the coil assembly.

8. The foot pad assembly according to any one of claims 1 to 7, characterized in that: A groove arranged around the coil (2) is provided inside the elastic support body (3), and an accommodating cavity (6) is formed between the groove and the positioning column (1), and the coil (2) is located in the accommodating cavity (6).

9. A control method for a foot pad assembly, characterized in that: The foot pad assembly is the foot pad assembly according to any one of claims 1 to 8, and the foot pad assembly is used to be arranged between the compressor (7) and the support surface (8). The method comprises: In response to a preset vibration frequency of the compressor (7), a preset current is applied to the coil (2) in the foot pad assembly, the preset current matching the preset vibration frequency.

10. A compressor device, characterized in that: The invention comprises a compressor (7) and a foot pad assembly according to any one of claims 1 to 8, wherein the foot pad assembly is used to be arranged between the compressor (7) and a support surface (8).

11. The compressor device according to claim 10, characterized in that The device further comprises a controller configured to execute the control method of the foot pad assembly according to claim 9 .

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