WO2024104001A1 - Dynamic vibration absorber, compressor and refrigeration and heating device - Google Patents

Abstract

Provided in the present application are a dynamic vibration absorber, a compressor and a refrigeration and heating device. The dynamic vibration absorber (10) comprises: a plurality of vibration absorption structures (11), wherein each vibration absorption structure (11) comprises mass blocks (112) and cantilevers (111) supporting the mass blocks (112), each mass block (112) being integrally formed on one end of one corresponding cantilever (111), and each cantilever (111) being resilient; and a support portion (12), wherein the end of each cantilever (111) away from the mass block (112) is connected to the support portion (12). When the support portion (12) is installed on an object to be subjected to vibration isolation, the mass blocks (112) vibrate to absorb vibration energy from said object so as to reduce the vibration thereof. In addition, according to a frequency range of the frequency of said object, the mass blocks (112) having corresponding masses and the cantilevers (111) having corresponding lengths and widths are provided on the support portion (12), thereby actively reduce vibration of the corresponding frequency range; the vibration reduction effect is better.

Description

Power shock absorbers, compressors and refrigeration and heating equipment

This application claims priority to the Chinese patent application filed with the China Patent Office on November 18, 2022, with application number 202211444246.9 and invention name “Power shock absorber, compressor and refrigeration and heating equipment”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application belongs to the technical field of compressors, and more specifically, relates to a dynamic vibration damper, a compressor and a refrigeration and heating device.

Background technique

Refrigerators and other household appliances have entered thousands of households and have become one of the essential household appliances for living. With people's continuous pursuit of living standards, the requirements for noise and vibration of household appliances are getting higher and higher. In the related technology, a motor and a compression mechanism are installed in the casing of the compressor. The motor drives the compression mechanism (such as a pump body) to operate to compress the gas. During the operation of the compressor, vibration is inevitable, which will affect the service life of the compressor and generate noise. At present, compressors usually use vibration absorption or vibration isolation methods to reduce the vibration of the compressor, such as sticking anti-vibration glue, setting vibration isolation pads, etc. However, these measures all belong to the category of passive vibration reduction technology, and the vibration reduction effect is poor.

Application Contents

The purpose of the embodiments of the present application is to provide a dynamic vibration damper, a compressor and a refrigeration and heating device to solve at least one of the above problems.

In order to achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is: to provide a dynamic vibration absorber, comprising:

A plurality of vibration absorbing structures, each of which comprises a mass block and a cantilever supporting the mass block, the mass block is integrally formed at one end corresponding to the cantilever, and each cantilever is elastic;

A supporting part, one end of each cantilever away from the mass block is connected to the supporting part.

In an optional embodiment, ends of the plurality of cantilevers away from the mass block are connected to form an intermediate plate, and the support portion is disposed on the intermediate plate.

In an optional embodiment, a plurality of the cantilevers are distributed on the circumference of the middle plate.

In an optional embodiment, the support portion is a protrusion formed by protruding from the middle of the middle plate to one side, or the support portion is a columnar member fixed to the middle plate.

In an optional embodiment, the cantilever of the vibration absorbing structure is tilted toward one side of the middle plate.

In an optional embodiment, the vibration absorbing structure is a plate-like structure formed by punching a plate.

In an optional embodiment, the distance from the center of gravity of the mass block to the central axis of the support portion is D, the width of the cantilever is H, and the length of the cantilever is L, then 0.6H+L≤D≤1.8H+L.

In an optional embodiment, the mass block is circular, and the radius of the mass block is R, then D=R+L.

In an optional embodiment, the length L of the cantilever is in the range of 10 mm-40 mm; and/or the width H of the cantilever is in the range of 5 mm-20 mm.

In an optional embodiment, the thickness T of the vibration absorbing structure ranges from 0.5 mm to 3 mm.

In an optional embodiment, the plurality of vibration absorbing structures are arranged rotationally symmetrically about a central axis of the support portion.

In an optional embodiment, the mass block is circular, elliptical or polygonal.

In an optional embodiment, the length of some of the cantilevers is inconsistent with the length of the rest of the cantilevers; and/or, the width of some of the cantilevers is inconsistent with the width of the rest of the cantilevers; and/or, the thickness of some of the cantilevers is inconsistent with the thickness of the rest of the cantilevers; and/or, the mass of some of the mass blocks is inconsistent with the mass of the rest of the mass blocks.

In an optional embodiment, the length of the support portion protruding from the cantilever is greater than the vibration amplitude of the mass block along the length direction of the support portion.

Another object of an embodiment of the present application is to provide a compressor, comprising a casing, on which is mounted a dynamic vibration absorber as described in any of the above embodiments.

Another object of the embodiments of the present application is to provide a refrigeration and heating device, comprising a base plate and a compressor as described in any of the above embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the three-dimensional structure of a dynamic shock absorber provided in an embodiment of the present application;

FIG2 is a schematic side view of the structure of a dynamic shock absorber provided in an embodiment of the present application;

FIG3 is a schematic structural diagram of a vibration absorbing structure provided in an embodiment of the present application;

FIG4 is a front view schematic diagram of the structure of the dynamic vibration absorber provided in an embodiment of the present application;

FIG5 is a front view schematic diagram of the structure of the dynamic vibration absorber provided in an embodiment of the present application;

FIG. 6 is a frequency response function curve diagram of a flat plate before and after the dynamic vibration absorber according to an embodiment of the present application is installed.

FIG7 is a front view of the structure of the dynamic vibration absorber provided in an embodiment of the present application;

FIG8 is a front view schematic diagram of the structure of the dynamic vibration absorber provided in an embodiment of the present application;

FIG9 is a schematic diagram of the three-dimensional structure of a dynamic vibration absorber provided in an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a partial structure of a compressor provided in an embodiment of the present application.

Among them, the main marks of the drawings in the figure are:

10-Power shock absorber;

11-vibration absorbing structure; 111-cantilever; 112-mass block; 113-middle plate; 12-supporting part; 120-central axis; 121-columnar member; 122-protruding part;

21- Casing.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application 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 application.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

In the description of the embodiments of the present application, the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "adjacent" refers to proximity in position. For example, for three components _A1 , _A2 and B, the distance between _A1 and B is greater than the distance between _A2 and B, then _A2 is closer to B than _A1 , that is _{, A2} is adjacent to B, or B is adjacent to _A2 . For another example, when there are multiple C components, the multiple C components are _C1 , _C2 ... _CN , and when one of the C components, such as _C2, is closer to component B than other C components, then B is adjacent to _C2 , or _C2 is adjacent to B.

Please refer to Figures 1 to 4 for an explanation of the dynamic vibration absorber 10 provided by the present application. The dynamic vibration absorber 10 includes a support portion 12 and a plurality of vibration absorbing structures 11, each vibration absorbing structure 11 being connected to the support portion 12 so as to support each vibration absorbing structure 11 through the support portion 12. When in use, the support portion 12 is connected to the object to be isolated, and each vibration absorbing structure 11 is connected to the object to be isolated, so as to absorb the vibration energy of the object to be isolated, reduce the vibration of the object to be isolated, and thereby reduce the vibration and noise of the object to be isolated.

Each vibration absorbing structure 11 includes a mass block 112 and a cantilever 111. The mass block 112 is located at one end of the cantilever 111. The other end of the cantilever 111 is connected to the support part 12, so that the mass block 112 is supported on the support part 12 through the cantilever 111, and when the support part 12 is installed on the object to be isolated from vibration, the mass block 112 can be suspended. The cantilever 111 is elastic, so that the support part 12 is installed on the object to be isolated from vibration. When the object to be isolated from vibration vibrates, the vibration energy can be transmitted to the cantilever 111 through the support part 12, and then transmitted to the mass block 112 through the cantilever 111, so as to drive the mass block 112 to swing and vibrate, thereby absorbing the vibration energy of the object to be isolated from vibration, so as to reduce the vibration of the object to be isolated from vibration.

Since the vibration absorbing structure 11 formed by the mass block 112 and the cantilever 111 can absorb vibrations in a specific frequency range well, a specific vibration absorbing structure 11 formed by the mass block 112 and the cantilever 111 can be set according to the vibration frequency of the object to be isolated, so as to actively reduce the vibration of the object to be isolated in the corresponding frequency range, thereby improving the noise reduction effect of the object to be isolated.

The mass block 112 is integrally formed on the corresponding cantilever 111 , so that the connection strength between the mass block 112 and the cantilever 111 can be protected, so that the mass block 112 can absorb vibration well.

In addition, by providing a plurality of vibration absorbing structures 11, the plurality of vibration absorbing structures 11 can absorb vibrations in different frequency ranges respectively, thereby achieving vibration reduction for a plurality of frequency ranges with relatively strong vibrations of the vibration isolation object, thereby improving the vibration reduction effect and achieving multi-peak vibration reduction.

Compared with the prior art, the dynamic vibration absorber 10 provided in the embodiment of the present application has a mass block 112 integrally formed at one end of the cantilever 111, and the other end of the cantilever 111 is connected to the support part 12, and the cantilever 111 is elastic. In this way, when the support part 12 is installed on the object to be isolated, the vibration of the object to be isolated will be transmitted to the cantilever 111 and the mass block 112, so that the mass block 112 vibrates to absorb the vibration energy of the object to be isolated, thereby reducing the vibration of the object to be isolated, and according to the vibration frequency range of the object to be isolated, a mass block 112 of corresponding mass and a cantilever 111 of corresponding length and width can be arranged on the support part 12 to actively reduce the vibration in the corresponding frequency range, thereby achieving a better vibration reduction effect.

In one embodiment, please refer to Figures 1 to 4, multiple cantilevers 111 are connected at one end away from the corresponding mass block 112 to form an intermediate plate 113, that is, the mass block 112 is arranged at one end of the cantilever 111, and the other ends of the multiple cantilevers 111 are connected to form the intermediate plate 113, and the support part 12 is arranged on the intermediate plate 113. In this way, the support part 12 can be set, and each cantilever 111 can be supported more stably, thereby supporting each mass block 112.

In one embodiment, a plurality of cantilevers 111 are distributed on the peripheral side of the middle plate 113, so that a plurality of mass blocks 112 can be distributed on the peripheral side of the middle plate 113. When each cantilever 111 and the mass blocks 112 thereon vibrate to absorb and reduce vibration, the force on the peripheral side of the support portion 12 can be more evenly distributed, so that the structural strength of the dynamic shock absorber 10 can be better guaranteed, so that the dynamic shock absorber 10 can stably reduce vibration.

In one embodiment, referring to FIGS. 1 to 4 , a plurality of vibration absorbing structures 11 are rotationally symmetrically arranged about the central axis 120 of the support portion 12, that is, a vibration absorbing structure 11 on one side of the support portion 12 and a vibration absorbing structure 11 on the other side of the support portion 12 are rotationally symmetrically arranged, that is, for two vibration absorbing structures 11 on opposite sides of the support portion 12, the cantilever 111 of one vibration absorbing structure 11a and the cantilever 111 of the other vibration absorbing structure 11b are rotationally symmetrically arranged, and the mass block 112 of one vibration absorbing structure 11a and the mass block 112 of the other vibration absorbing structure 11b are rotationally symmetrically arranged. This structural arrangement can make the circumferential force of the support portion 12 more balanced. The central axis 120 of the support portion 12 is also the central axis of the middle plate 113.

In one embodiment, the length of the support portion 12 protruding from the cantilever 111 is greater than the vibration amplitude of the mass block 112 along the length direction of the support portion 12. With this arrangement, when the support portion 12 is installed on the object to be isolated, the mass block 112 and the cantilever 111 will not touch the object to be isolated when they swing and vibrate, thereby improving the vibration reduction effect.

Please refer to Figures 1 to 4. For the vibration absorbing structure 11, when the length of the cantilever 111 changes, the position of the mass block 112 to the support part 12 will change, so that the natural frequency of the vibration absorbing structure 11 can be changed, that is, the natural frequency range of vibration reduction of the dynamic vibration absorber 10 will be changed, so as to adjust the natural frequency of vibration reduction of the vibration absorbing structure 11 to the vibration frequency range of the object to be isolated, so as to enhance the vibration reduction effect on the object to be isolated.

For the vibration absorbing structure 11, when the width of the cantilever 111 changes, the overall elasticity of the cantilever 111 will change, and then the vibration amplitude of the mass block 112 can be changed, so that the natural frequency of the vibration absorbing structure 11 can be changed, that is, the natural frequency range of vibration reduction of the dynamic vibration absorber 10 will be changed, so as to adjust the natural frequency of vibration reduction of the vibration absorbing structure 11 to the vibration frequency range of the object to be isolated, so as to enhance the vibration reduction effect on the object to be isolated.

For the vibration absorbing structure 11, when the thickness of the cantilever 111 changes, the overall elasticity of the cantilever 111 will change, and then the vibration amplitude of the mass block 112 can be changed, so that the natural frequency of the vibration absorbing structure 11 can be changed, that is, the natural frequency range of vibration reduction of the dynamic vibration absorber 10 will be changed, so as to adjust the natural frequency of vibration reduction of the vibration absorbing structure 11 to the vibration frequency range of the object to be isolated, so as to enhance the vibration reduction effect on the object to be isolated.

For the vibration absorbing structure 11, when the mass of the mass block 112 changes, the natural frequency range of the vibration absorbing structure 11 can be changed, that is, the natural frequency of the vibration reduction of the dynamic vibration absorber 10 will be changed, so as to adjust the natural frequency of the vibration reduction of the vibration absorbing structure 11 to the vibration frequency range of the object to be isolated, so as to improve the vibration reduction effect on the object to be isolated.

In one embodiment, among the multiple vibration absorbing structures 11, the length of some cantilevers 111 is inconsistent with the length of the remaining cantilevers 111, so that the natural frequency of vibration reduction of some vibration absorbing structures 11 can be different from the natural frequency of vibration reduction of the remaining vibration absorbing structures 11, so as to reduce vibrations in different frequency ranges.

In one embodiment, among the multiple vibration absorbing structures 11, the width of some cantilevers 111 is inconsistent with the width of the remaining cantilevers 111, so that the natural frequency of vibration reduction of some vibration absorbing structures 11 can be different from the natural frequency of vibration reduction of the remaining vibration absorbing structures 11, so as to reduce vibrations in different frequency ranges.

In one embodiment, among the multiple vibration absorbing structures 11, the thickness of some cantilevers 111 is inconsistent with the thickness of the remaining cantilevers 111, so that the natural frequency of vibration reduction of some vibration absorbing structures 11 can be different from the natural frequency of vibration reduction of the remaining vibration absorbing structures 11, so as to reduce vibrations in different frequency ranges.

In one embodiment, among the multiple vibration absorbing structures 11, the mass of some mass blocks 112 is inconsistent with the mass of the remaining mass blocks 112, so that the natural frequency of vibration reduction of some vibration absorbing structures 11 can be different from the natural frequency of vibration reduction of the remaining vibration absorbing structures 11, so as to reduce vibrations in different frequency ranges.

In one embodiment, the area of the mass block 112 may be changed to change the mass of the mass block 112. Of course, the mass of the mass block 112 may also be changed by changing the thickness of the mass block 112.

In one embodiment, the support portion 12 is a columnar member 121 fixed to the middle plate 113, that is, the support portion 12 is columnar, such as a round column with a circular cross section, a square column with a square cross section, etc. Using the columnar member 121 as the support portion 12, it is convenient to adjust the structural strength and length of the support column, and then install and use it. When the support portion 12 uses the columnar member 121, the support portion 12 can be made separately and welded to the middle plate 113. Of course, the support portion 12 can also be fixed to the middle plate 113 by other convenient methods, such as riveting, threaded fixing, etc.

In one embodiment, the vibration absorbing structure 11 is a plate-shaped structure formed by punching a plate, that is, a plate is used to punch and form the vibration absorbing structure 11, so as to facilitate processing and manufacturing, and to ensure that the mass block 112 is stably connected to the cantilever 111. The vibration absorbing structure 11 can be made by punching a metal plate. Of course, the vibration absorbing structure 11 can also be made by punching a plate of other materials. It is understandable that the vibration absorbing structure 11 can also be made by stamping.

In one embodiment, a plurality of connected vibration absorbing structures 11 can be formed by punching a plate, which can facilitate the processing and manufacturing of the dynamic vibration absorber 10 and ensure the connection strength of the plurality of vibration absorbing structures 11. It can be understood that the plurality of vibration absorbing structures 11 can also be manufactured separately and then fixedly connected.

In one embodiment, the cantilever 111 of the vibration absorbing structure 11 can be tilted toward one side of the middle plate 113, so that when the support portion 12 is installed on the object to be isolated, it can avoid that the mass block 112 and the cantilever 111 touch the object to be isolated when they swing and vibrate. The cantilever 111 can be bent and tilted toward the side of the middle plate 113 away from the support portion 12. Of course, the cantilever 111 can be bent and tilted toward the side of the middle plate 113 where the support portion 12 is located. As long as the mass block 112 and the cantilever 111 can swing and vibrate without touching the object to be isolated, it will be fine. It can be understood that the cantilever 111 can also be a flat structure to facilitate processing and manufacturing, and after installation, it is determined whether the cantilever 111 is bent and tilted according to the installation position.

In one embodiment, the distance from the center of gravity of the mass block 112 to the central axis 120 of the support portion 12 is D, the width of the cantilever 111 is H, and the length of the cantilever 111 is L, then 0.6H+L≤D≤1.8H+L. This can ensure that the mass block 112 is not too large relative to the cantilever 111, so that when the mass block 112 vibrates, the amplitude of the mass block 112 can be avoided to be too large, and the vibration absorption structure 11 can be ensured to have a good vibration reduction effect. When D is set to be small, such as less than 0.6H+L, the vibration absorption capacity of the mass block 112 is weak. When D is set to be too large, such as greater than 1.8H+L, the mass block 112 is too large relative to the cantilever 111, which will cause the amplitude of the mass block 112 to be too large and also cause the vibration absorption capacity to decrease.

In one embodiment, the mass block 112 is circular, the center of gravity of the mass block 112 is the center of the circle, the radius of the mass block 112 is R, then D=R+L, and the range of R is 0.6H to 1.8H, that is, 0.6H≤R≤1.8H.

In one embodiment, the length L of the cantilever 111 ranges from 10 mm to 40 mm, such as 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, etc., to ensure that the length L of the cantilever 111 is set reasonably to avoid the cantilever 111 being too short, such as less than 10 mm, which results in a weak vibration absorption performance of the mass block 112 on the cantilever 111. If the length L of the cantilever 111 is too large, such as greater than 40 mm, on the one hand, the size of the dynamic shock absorber 10 is too large, and on the other hand, the amplitude of the mass block 112 is too large, resulting in a decrease in the vibration absorption capacity.

In one embodiment, the width H of the cantilever 111 ranges from 5 mm to 20 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc., to ensure that the width H of the cantilever 111 is reasonably set to protect the good vibration reduction effect of the vibration absorbing structure 11. When the width H of the cantilever 111 is too small, such as less than 5 mm, it is necessary to set the mass of the mass block 112 on the cantilever 111 to be smaller, and the mass of the mass block 112 on the cantilever 111 is too small, resulting in weak vibration absorption performance of the vibration absorbing structure 11. If the width H of the cantilever 111 is too large, such as greater than 20 mm, it will be difficult for the mass block 112 to drive the cantilever 111 to vibrate, resulting in a decrease in vibration absorption capacity.

In one embodiment, the thickness T of the vibration absorbing structure 11 ranges from 0.5 mm to 3 mm, such as T can be 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, etc., to ensure good elasticity of the cantilever 111, facilitate the vibration energy absorption of the mass block 112, and ensure the vibration reduction effect. When the thickness T of the vibration absorbing structure 11 is too large, such as greater than 3 mm, it will make it difficult for the mass block 112 to drive the cantilever 111 to vibrate, resulting in a decrease in the vibration absorption capacity. When the thickness T of the vibration absorbing structure 11 is too small, the strength of the cantilever 111 will be small, and the vibration absorption capacity of the mass block 112 will be weak.

The vibration absorbing structures 11 with the same parameters, such as the length of the cantilever 111 , the width of the cantilever 111 , the mass of the mass block 112 , etc., are defined as a vibration absorbing structure 11 of a parameter model, and the natural frequencies of the vibration absorbing structures 11 of the same parameter model are the same or similar.

In one embodiment, a plurality of parameter models of vibration absorbing structures 11 can be provided on the support portion 12, and specifically, they can be provided according to the range of the frequency peak point where vibration reduction is required. For example, in the present embodiment, four parameter models of vibration absorbing structures 11 are provided on the support portion 12, and two vibration absorbing structures 11 of the same parameter model are symmetrically provided. Of course, in some embodiments, one vibration absorbing structure 11 of a parameter model can also be provided. It can be understood that the parameter models of the vibration absorbing structure 11 connected to the support portion 12 can also be provided in three, five, or other quantities, which are not limited here.

In one embodiment, the parameters of the vibration absorbing structures 11 on the support portion 12 are relatively different, that is, the mass difference between the multiple mass blocks 112 is relatively small. The length difference between the multiple cantilevers 111 is relatively small. The width difference between the multiple cantilevers 111 is relatively small. In this way, the natural frequencies of the vibration absorbing structures 11 are relatively close, so that the cooperation of the multiple vibration absorbing structures 11 can reduce vibration in a larger frequency range.

Please refer to FIG5 , which is a front view of a dynamic vibration absorber 10 provided in an embodiment of the present application. The difference between the dynamic vibration absorber 10 of this embodiment and the dynamic vibration absorber 10 of the embodiment described in FIG4 is that in this embodiment, the parameters of the four vibration absorbing structures 11 differ greatly, that is, the mass difference between the multiple mass blocks 112 is relatively large. The length difference between the multiple cantilevers 111 is large. The width difference between the multiple cantilevers 111 is large. In this way, the natural frequencies of the vibration absorbing structures 11 differ greatly, so that the cooperation of the multiple vibration absorbing structures 11 can reduce vibration in multiple set frequency bands.

Please refer to FIG. 5 and the following Table 1, which shows the cantilever 111 length L, cantilever 111 width H and radius R of mass block 112 corresponding to the four parameter models of vibration absorbing structures 11 in FIG. 5, as well as the first-order natural frequency of each vibration absorbing structure 11, wherein the thickness T of the vibration absorbing structure 11 is 1 mm.

Table 1

Natural frequency (Hz)	L(mm)	H(mm)	R(mm)
198	29.9	12	twenty four
724	21.1	5.4	7
1204	17.2	4.2	5
1694	13.4	9.7	8

In Table 1 above, the natural frequency represents the first-order natural frequency of the vibration-absorbing structure 11 under the same row of dimensional parameters, such as the first-order natural frequency of the vibration-absorbing structure 11 with a cantilever 111 length L of 29.9 mm, a width H of 12 mm, and a mass block 112 radius R of 24 mm is 198 Hz. The first-order natural frequency of the vibration-absorbing structure 11 with a cantilever 111 length L of 21.1 mm, a width H of 5.4 mm, and a mass block 112 radius R of 7 mm is 724 Hz. The first-order natural frequency of the vibration-absorbing structure 11 with a cantilever 111 length L of 17.2 mm, a width H of 4.2 mm, and a mass block 112 radius R of 5 mm is 1204 Hz. The first-order natural frequency of the vibration-absorbing structure 11 with a cantilever 111 length L of 13.4 mm, a width H of 9.7 mm, and a mass block 112 radius R of 8 mm is 1694 Hz.

Please refer to FIG. 6 , which is a frequency response function curve diagram before and after a dynamic vibration absorber 10 corresponding to the parameters in Table 1 is installed on a flat plate. The horizontal axis in the figure is the frequency, and the vertical axis in the figure is the amplitude. It can be seen from the figure that after installing the above-mentioned dynamic vibration absorber 10, the peak value of the frequency response function is greatly weakened within the four target frequency ranges, thereby achieving good vibration reduction.

Please refer to FIG. 7 , which is a front view of a dynamic vibration absorber 10 provided in an embodiment of the present application. The difference between the dynamic vibration absorber 10 of this embodiment and the dynamic vibration absorber 10 of the embodiment described in FIG. 5 is that in this embodiment, a mass block 112c of a vibration absorbing structure 11c is arranged in a polygonal shape, a mass block 112d of a vibration absorbing structure 11d is arranged in a circular shape, and a mass block 112e of a vibration absorbing structure 11e is arranged in an elliptical shape. In other words, the shapes of the mass blocks 112 of each vibration absorbing structure 11 can be arranged differently. It is understandable that the shapes of the mass blocks 112 of some vibration absorbing structures 11 can also be different from those of the remaining mass blocks 112.

In one embodiment, the mass blocks 112 of each vibration absorbing structure 11 may be configured to be polygonal. Of course, the mass blocks 112 of each vibration absorbing structure 11 may also be configured to be elliptical or circular, but this is not a sole limitation.

In one embodiment, there are three pairs of vibration absorbing structures 11, and the two vibration absorbing structures 11 in each pair are arranged rotationally symmetrically about the central axis 120 of the support portion 12. The three pairs of vibration absorbing structures 11 have different parameter models.

Please refer to FIG8 , which is a front view of the dynamic vibration absorber 10 provided in the embodiment of the present application. The difference between the dynamic vibration absorber 10 of the present embodiment and the dynamic vibration absorber 10 of the embodiment described in FIG4 is that in the present embodiment, a plurality of vibration absorbing structures 11 are provided on the peripheral side of the support portion 12, and the size parameters of each vibration absorbing structure 11 are different. In this way, while ensuring that the overall volume occupied by the dynamic vibration absorber 10 is similar, more vibration absorbing structures 11 with different parameter models can be provided to cooperate with the vibration of a larger frequency range for good vibration reduction.

Please refer to Fig. 9, which is a three-dimensional view of the dynamic vibration absorber 10 provided in the embodiment of the present application. The difference between the dynamic vibration absorber 10 of this embodiment and the dynamic vibration absorber 10 of the embodiment described in Fig. 1 is that in this embodiment, the support portion 12 is a protrusion 122 formed by protruding from the middle of the middle plate 113, that is, the middle of the middle plate 113 is protruded to form the protrusion 122, and the protrusion 122 serves as the support portion 12, and the structure is more convenient to manufacture and can also ensure the connection strength between the support portion 12 and the middle plate 113.

In one embodiment, the dynamic vibration absorber 10 is formed by punching a plate, that is, the plate is punched to form the middle plate 113, each cantilever 111, each mass block 112 and the support portion 12, which is more convenient to process and manufacture.

In one embodiment, the middle plate 113 is arranged in a circular shape so that the positions of the cantilevers 111 are arranged and laid out so that the force on the peripheral side of the support portion 12 is more balanced.

The dynamic vibration damper 10 of the embodiment of the present application can be used to set a mass block 112 of a specific mass and a corresponding cantilever 111 according to the vibration frequency of the object to be isolated, so as to actively reduce vibration in the specific vibration frequency range of the object to be isolated, and the vibration reduction effect is good. The dynamic vibration damper 10 of the embodiment of the present application can be used for vibration reduction of compressors, and can also be used for vibration reduction of other equipment, such as motor vibration reduction, pump vibration reduction, etc.

Please refer to FIG10 , the embodiment of the present application also provides a compressor. Please refer to FIG1 , the compressor includes a housing 21, and the housing 21 is mounted with a dynamic vibration damper 10 as described in any of the above embodiments. The compressor uses the dynamic vibration damper 10 of the above embodiment, has the technical effect of the above dynamic vibration damper 10, and can actively reduce the vibration of the compressor in a specific frequency range to reduce vibration and noise.

During assembly, the support portion 12 can be fixedly connected to the inner surface of the housing 21 by welding, threading, riveting, etc. to reduce vibration of the compressor. Of course, during assembly, the support portion 12 can be fixedly connected to the outer surface of the housing 21 by welding, threading, riveting, etc. to reduce vibration of the compressor.

In one embodiment, when the dynamic vibration absorber 10 is installed on the inner surface of the casing 21, the cantilever 111 of the vibration absorbing structure 11 can be bent so that when the mass block 112 vibrates, it will not touch the internal components of the casing 21 and the compressor, so as to better reduce vibration and enhance the vibration reduction and noise reduction effects.

The compressor of the embodiment of the present application can be a rotary compressor, a reciprocating piston compressor, a scroll compressor, etc.

The embodiment of the present application also provides a refrigeration and heating device. The refrigeration and heating device includes a compressor as described in any of the above embodiments. The refrigeration and heating device uses the compressor of the above embodiment, has the technical effect of the above compressor, and has low vibration and noise during operation.

The cooling and heating equipment in the embodiment of the present application may be a cooling-only equipment, such as a refrigerator or an air conditioner, or a heating-only equipment, or a equipment that combines cooling and heating.

The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (16)

1. A dynamic vibration absorber, characterized by comprising:

   A plurality of vibration absorbing structures, each of which comprises a mass block and a cantilever supporting the mass block, the mass block is integrally formed at one end corresponding to the cantilever, and each cantilever is elastic;

   A supporting part, one end of each cantilever away from the mass block is connected to the supporting part.
2. The dynamic vibration absorber according to claim 1 is characterized in that: the ends of the plurality of cantilevers away from the mass block are connected to form an intermediate plate, and the support portion is arranged on the intermediate plate.
3. The dynamic vibration absorber according to claim 2 is characterized in that a plurality of the cantilevers are distributed around the circumference of the intermediate plate.
4. The dynamic vibration absorber according to claim 2 or 3 is characterized in that: the support portion is a protrusion formed by the middle portion of the intermediate plate protruding to one side, or the support portion is a columnar member fixed to the intermediate plate.
5. The dynamic vibration absorber according to any one of claims 2 to 4 is characterized in that the cantilever of the vibration absorbing structure is tilted toward one side of the middle plate.
6. The dynamic vibration absorber according to any one of claims 1 to 5 is characterized in that the vibration absorbing structure is a plate-like structure formed by punching a plate.
7. The dynamic vibration absorber according to claim 6 is characterized in that: the distance from the center of gravity of the mass block to the central axis of the support portion is D, the width of the cantilever is H, and the length of the cantilever is L, then 0.6H+L≤D≤1.8H+L.
8. The dynamic vibration absorber as described in claim 7 is characterized in that: the mass block is circular, the radius of the mass block is R, and D=R+L.
9. The dynamic vibration absorber according to claim 7 or 8 is characterized in that: the length L of the cantilever is in the range of 10 mm-40 mm; and/or the width H of the cantilever is in the range of 5 mm-20 mm.
10. The dynamic vibration absorber according to any one of claims 6 to 9 is characterized in that the thickness T of the vibration absorbing structure ranges from 0.5 mm to 3 mm.
11. The dynamic vibration absorber according to any one of claims 1 to 10 is characterized in that the plurality of vibration absorbing structures are rotationally symmetrically arranged about the central axis of the support portion.
12. The dynamic vibration absorber according to any one of claims 1 to 11 is characterized in that the mass block is circular, elliptical or polygonal.
13. The dynamic vibration absorber as described in any one of claims 1 to 12 is characterized in that: the length of some of the cantilevers is inconsistent with the length of the rest of the cantilevers; and/or the width of some of the cantilevers is inconsistent with the width of the rest of the cantilevers; and/or the thickness of some of the cantilevers is inconsistent with the thickness of the rest of the cantilevers; and/or the mass of some of the mass blocks is inconsistent with the mass of the rest of the mass blocks.
14. The dynamic vibration absorber according to any one of claims 1 to 13 is characterized in that the length of the support portion protruding from the cantilever is greater than the vibration amplitude of the mass block along the length direction of the support portion.
15. A compressor comprises a casing, wherein the casing is provided with a dynamic vibration absorber as claimed in any one of claims 1 to 14.
16. A refrigeration and heating device, characterized in that it also includes the compressor as claimed in claim 15.