CN114033697B

CN114033697B - Limiter, compressor and refrigeration equipment

Info

Publication number: CN114033697B
Application number: CN202111383227.5A
Authority: CN
Inventors: 张肃; 郭莉娟; 吴旭昌
Original assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd; Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-16
Anticipated expiration: 2041-11-22
Also published as: CN114033697A

Abstract

The invention discloses a limiter, a compressor and refrigeration equipment, wherein the compressor comprises an exhaust valve seat and an exhaust valve plate, the exhaust valve seat is provided with an exhaust hole, the exhaust valve plate is used for opening or closing the exhaust hole, the limiter comprises a mounting part and a limiting part, and the mounting part is connected with the exhaust valve seat; the limiting part is connected with the mounting part, extends along the length direction of the limiter and corresponds to the exhaust valve plate so as to limit the exhaust valve plate; the one end that spacing portion kept away from the installation department is equipped with the damping section, the thickness orientation of damping section is kept away from the direction of installation department reduces gradually, makes the damping section thinner and thinner, and the tip of stopper is continuous to be narrowed like this, when spacing portion received the slapping of exhaust valve block, can reduce the vibration response of stopper through the damping section, is favorable to the noise that the suppression produced because of vibration transmission, and the reliability is high, and it is effectual to make an uproar to fall.

Description

Limiter, compressor and refrigeration equipment

Technical Field

The invention relates to the technical field of electric appliances, in particular to a limiter of a compressor, the compressor and refrigeration equipment.

Background

In the related art, a compression mechanism of a compressor usually utilizes a valve assembly to exhaust, and as the valve assembly structure has a periodic exhaust characteristic, an exhaust valve plate of the valve assembly can periodically slap a limiter to excite the limiter to generate larger vibration, and then the larger vibration is transmitted to a shell and other structures to radiate noise outwards, so that the working noise of the compressor is larger.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the limiter suitable for the compressor, which can effectively attenuate the vibration response generated by the impact of the exhaust valve plate on the limiter, and achieves the aim of noise reduction.

The invention also provides a compressor and refrigeration equipment comprising the limiter.

According to an embodiment of the first aspect of the present invention, a stopper for a compressor including a discharge valve seat provided with a discharge hole and a discharge valve sheet for opening or closing the discharge hole, the stopper includes:

a mounting portion connected to the exhaust valve seat;

the limiting part is connected with the mounting part, extends along the length direction of the limiter and corresponds to the exhaust valve plate so as to limit the exhaust valve plate;

the limiting part is far away from one end of the mounting part, a vibration reduction section is arranged at one end of the limiting part, and the thickness of the vibration reduction section gradually decreases towards the direction far away from the mounting part.

The limiter provided by the embodiment of the invention has at least the following beneficial effects:

the exhaust valve plate is limited through the limiting part, the vibration reduction section is arranged at one end of the limiting part, which is far away from the mounting part, the thickness of the vibration reduction section is gradually reduced towards the direction, which is far away from the mounting part, so that the vibration reduction section is thinner and thinner, the end part of the limiter is continuously narrowed, and the vibration response of the limiter can be reduced through the vibration reduction section when the limiting part is slapped by the exhaust valve plate, thereby being favorable for suppressing noise generated due to vibration transmission, and having high reliability and good noise reduction effect.

According to some embodiments of the invention, the thickness of the vibration reduction section gradually decreases exponentially in power along the length of the stopper, and satisfies a power exponent curve h=a×x ⁿ Wherein h is the thickness of the vibration reduction section, A is a curve coefficient, x is the distance along the length direction of the limiter, m is a power exponent and m is more than or equal to 2.

According to some embodiments of the invention, the profile of the upper and/or lower surface of the vibration reduction segment in the thickness direction is the power exponent curve.

According to some embodiments of the invention, the thickness of the end of the vibration reduction section away from the mounting part is h1, and h1 is more than or equal to 0.1mm.

According to some embodiments of the invention, the end of the vibration reduction section is provided with an extension extending in the length direction of the stopper.

According to some embodiments of the invention, the extension is provided with equal thickness.

According to some embodiments of the invention, the surface of the vibration reduction section is provided with a damping material.

According to some embodiments of the invention, the mounting portion is provided with a mounting hole, and the distance between the vibration reduction section and the mounting hole along the length direction of the limiter is d, and d is more than or equal to 5mm.

A compressor according to an embodiment of the second aspect of the present invention comprises a stopper according to an embodiment of the first aspect.

The compressor provided by the embodiment of the invention has at least the following beneficial effects:

the limiter of the embodiment is adopted to limit the exhaust valve plate, the vibration reduction section is arranged at one end of the limiting part, which is far away from the mounting part, so that the end part of the limiter is continuously narrowed, and when the limiting part is slapped by the exhaust valve plate, the vibration response of the limiter can be reduced through the vibration reduction section, thereby being beneficial to inhibiting noise generated by vibration transmission, and the limiter is high in reliability and good in noise reduction effect.

A refrigeration appliance according to an embodiment of the third aspect of the present invention includes a compressor according to an embodiment of the second aspect.

The refrigeration equipment adopts all the technical schemes of the compressor of the embodiment, so that the refrigeration equipment has at least all the beneficial effects brought by the technical schemes of the embodiment.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic cross-sectional view of a stopper according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a stopper according to another embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 4 is a schematic cross-sectional view of a stopper according to another embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a stopper according to another embodiment of the present invention;

FIG. 6 is a graph showing the comparative effects of different cutoff thicknesses versus vibration frequency for an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a compression mechanism according to an embodiment of the present invention;

fig. 8 is an enlarged schematic view of the structure at B in fig. 7.

Reference numerals:

a stopper 100; a mounting portion 110; a mounting hole 111; a limiting portion 120; a vibration reduction section 121; contour curve 122; an extension 123; damping material 124;

a compression mechanism 200; a cylinder 210; an upper bearing 220; a lower bearing 230; an exhaust valve seat 240; a discharge valve plate 241; a vent hole 242; and a crankshaft 250.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms left, right, etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present invention, it should be noted that terms such as arrangement, installation, connection, etc. should be construed broadly, and those skilled in the art may reasonably determine the specific meaning of the foregoing terms in the present invention in combination with the specific content of the technical solution.

In the description of the present invention, the description of some embodiments, specific embodiments, etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same implementations or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

A limiter 100 according to an embodiment of the present invention is described with reference to fig. 1 to 7, and the limiter 100 is applied to a rotary compressor, and the limiter 100 is described below with a specific example.

Referring to fig. 1, in the embodiment of the present invention, a stopper 100 is provided, the stopper 100 is connected to a compression mechanism 200 (not shown in the drawings) in a compressor, the compression mechanism 200 includes a discharge valve seat 240, a discharge hole 242 is provided on the discharge valve seat 240, a discharge valve plate 241 is provided on the discharge valve seat 240, the stopper 100 is connected to the discharge valve seat 240, and the discharge valve plate 241 is located between the stopper 100 and the discharge hole 242 for opening or closing the discharge hole 242.

Referring to fig. 1, in some embodiments, the limiter 100 includes a mounting portion 110 and a limiting portion 120, where the mounting portion 110 is connected to the limiting portion 120 to form a strip-shaped plate, and the mounting portion 110 is used to be connected to the exhaust valve seat 240, and the limiting portion 120 extends along a length direction of the limiter 100, so that the limiting portion 120 corresponds to the exhaust valve plate 241, and the limiting portion 120 can limit the exhaust valve plate 241.

Fig. 1 is a schematic cross-sectional view of a limiter 100, where the mounting portion 110 is approximately straight, and the limiting portion 120 is bent towards a direction away from the exhaust valve plate 241, so that a certain distance can be spaced between the limiting portion 120 and the exhaust valve plate 241, and the movement stroke of the exhaust valve plate 241 is conveniently limited, so that the exhaust valve plate 241 can be opened to a proper height. It can be understood that the limiter 100 may be divided into a head portion and a tail portion along the length direction, wherein the limiting portion 120 is a head portion of the limiter 100, the mounting portion 110 is a tail portion of the limiter 100, the tail portion of the limiter 100 is connected with the exhaust valve seat 240, and the exhaust valve is limited by the head portion of the limiter 100.

The mounting portion 110 is provided with a mounting hole 111, and the mounting hole 111 penetrates the mounting portion 110 in the thickness direction of the stopper 100. It will be appreciated that the exhaust valve seat 240 is provided with a connecting hole corresponding to the mounting hole 111, and when assembled, the mounting portion 110 can be fixed to the exhaust valve seat 240 by passing a bolt through the mounting hole 111 and the connecting hole of the exhaust valve seat 240, thereby fixing the tail portion of the retainer 100.

Considering that the exhaust valve seat 240 is a periodic exhaust, the exhaust valve plate 241 will periodically slap the limiter 100 under the pressure of the high-pressure gas, so that the limiter 100 generates a larger vibration, and the vibration will be transmitted to the shell of the compressor and other structures, thereby radiating noise outwards and causing a larger working noise of the compressor. Based on this, in the stopper 100 of the embodiment, the vibration-damping section 121 is disposed at the end of the limiting portion 120, the vibration-damping section 121 is located at the end of the limiting portion 120 away from the mounting portion 110, and the thickness of the vibration-damping section 121 gradually decreases toward the direction away from the mounting portion 110, that is, the position of the vibration-damping section 121 of the stopper 100 gradually becomes thinner along the length direction, and when the limiting portion 120 is slapped by the exhaust valve plate 241, the vibration response of the stopper 100 can be reduced by the vibration-damping section 121, which is beneficial to suppressing noise generated due to vibration transmission.

Specifically, the damper segment 121 is located at the head of the stopper 100, and the further the damper segment 121 is located away from the mounting portion 110, the smaller the thickness of the damper segment 121 is, so that the end of the stopper portion 120 forms a tip having a substantially flat shape. It can be understood that the vibration reduction section 121 is located at the end of the limiting portion 120, and the end, connected to the mounting portion 110, of the limiting portion 120 has a thickness that is uniformly distributed, that is, the thickness of the mounting portion 110 and the thickness of the end, close to the mounting portion 110, of the limiting portion 120 can be equal in thickness, and the thickness of the limiting portion 120 at the position of the vibration reduction section 121 is distributed according to a certain rule, so that the thickness of the vibration reduction section 121 is set to be unequal in thickness, and the end of the limiting portion 120 is gradually thinned.

It will be appreciated that, taking the limiter 100 shown in fig. 1 as an example, the limiting portion 120 is bent towards the upper side, the end of the limiting portion 120 is gradually thinned, after the limiter 100 is installed in place, the limiting portion 120 corresponds to the exhaust valve plate 241, and the exhaust valve plate 241 is limited by the limiting portion 120. During operation, the exhaust valve plate 241 can slap the limiter 100 to enable the limiter 100 to vibrate and radiate noise outwards, the vibration reduction section 121 also vibrates along with the limiter 100, the wave speed of vibration waves in the vibration reduction section 121 is smaller than that of vibration waves of the limiter 100, so that aggregation is generated, energy is dissipated at the tip, vibration response of the limiter 100 can be reduced, noise generated due to vibration transmission is further suppressed, and the vibration reduction device is simple in structure, high in reliability and good in noise reduction effect.

It should be noted that, referring to fig. 1, the thickness of the vibration reduction section 121 may be understood as a distance between an upper surface and a lower surface of the vibration reduction section 121, and a surface of the vibration reduction section 121 facing away from the exhaust valve plate 241 may be provided with an inclined surface, so that the thickness of the vibration reduction section 121 is gradually reduced, that is, the upper surface of the vibration reduction section 121 is provided with an inclined surface, which may be an arc curved surface, the arc curved surface is connected with the upper surface of the limiting portion 120 to form a curved surface, and the lower surface of the vibration reduction section 121 and the lower surface of the limiting portion 120 are smoothly transited. It will be appreciated that the upper surface profile 122 of the damper segment 121 is functionally tapered as shown in fig. 1, so as to satisfy the decreasing thickness of the damper segment 121 along the length. In addition, the mounting portion 110 and the limiting portion 120 are integrally formed, and the vibration reduction section 121 can be formed by cutting or the like, so that the structure is stable and reliable.

Referring to fig. 2, in some embodiments, an arc curved surface may be disposed on the lower surface of the vibration reduction section 121, which is different from the embodiment shown in fig. 1 in that the profile curve 122 of the lower surface is in a shape with increasing functions, and since the curve is located on the lower surface of the vibration reduction section 121, the thickness of the vibration reduction section 121 can be continuously reduced along the length direction, and the specific working principle can be described with reference to the embodiment shown in fig. 1. It will be appreciated that in some embodiments, an arc curved surface may be disposed on the upper surface and the lower surface of the vibration reduction section 121 at the same time, the structure of this embodiment is not shown in the drawings, and the specific structure is understood in conjunction with the embodiments of fig. 1 and 2 and will not be described herein.

Referring to fig. 1, in some embodiments, the thickness of the vibration reduction segment 121 varies exponentially in power along the length of the stop 100, and satisfies h=a×x ⁿ Where h is the thickness of the vibration reduction segment 121, a is a curve coefficient, x is a distance in the length direction, m is a power exponent, and m is equal to or greater than 2, it is understood that the maximum thickness position of the vibration reduction segment 121 is taken as an origin, and the distance in the length direction is the distance between the origin and different positions on the vibration reduction segment 121. That is, in the longitudinal direction of the stopper 100, the distance of the thickness of the damper segment 121 from the longitudinal direction satisfies a relationship of a power exponent function, and the thickness of the damper segment 121 decreases in a power exponent form toward the right direction, for example, a power exponent curve of h=2x, as illustrated in the direction shown in fig. 1 ² When the distance in the longitudinal direction is 2mm (millimeters), the thickness of the corresponding damper segment 121 is 8mm.

It should be noted that, as shown in fig. 1, the profile curve 122 of the upper surface of the vibration absorbing section 121 varies in a form of a power exponent, so that the thickness of the vibration absorbing section 121 continuously decreases in a form of a power exponent along the length direction, that is, the profile curve 122 of the upper surface of the vibration absorbing section 121 can be understood as a power exponent curve, the thickness of the vibration absorbing section 121 gradually decreases from left to right, and varies in a form of a power exponent decreasing, so as to satisfy h=a×x ^m 。

It will be appreciated that, since the thickness of the vibration reduction section 121 varies exponentially, the region of the vibration reduction section 121 that varies exponentially can also be understood as an acoustic black hole region, and the acoustic black hole effect is that the propagation speed of the wave in the acoustic black hole region is gradually reduced by using the power exponent variation of the geometric parameter or the material characteristic parameter of the thin-wall structure, and in an ideal case, the wave speed can be reduced to zero, so that the reflection phenomenon does not occur. The acoustic black hole can be used for gathering the wave energy propagated in the structure at a specific position, so that the acoustic black hole has obvious advantages in the application of vibration reduction and noise reduction of the thin-wall structure, and the acoustic black hole has the characteristics of high efficiency in broadband wave gathering, simplicity and flexibility in implementation method and the like.

As can be understood from the acoustic black hole effect, the vibration reduction section 121 adopts an acoustic black hole structure, the thickness of the vibration reduction section 121 is distributed according to the law that the power exponent gradually decreases, the vibration reduction section 121 can reduce the propagation speed of the wave in the structure, and convert the supersonic wave into subsonic wave, so that the broadband wave is gathered in the area with thinned structure thickness on a certain spatial scale, the effect of inhibiting the acoustic radiation in the structure is achieved, the vibration response of the limiter 100 can be remarkably reduced, and the effective noise reduction effect is achieved.

It can be understood that in the area where the thickness is uniformly distributed on the limiting portion 120, the wave propagation speed of a certain frequency is unchanged, and the wave propagation speed on the vibration reduction section 121 is reduced along with the power exponent of the thickness, so that the purpose of high-efficiency vibration reduction and noise reduction is achieved. The embodiment adopts the acoustic black hole structure on the limiter 100, so that the vibration wave energy can be dissipated at the tip, the noise reduction effect is remarkable for the middle-high frequency broadband noise caused by the slapping of the valve plate, and the noise of partial frequency bands can be reduced by 3dB-7dB, thereby reducing the noise radiation of the compressor。

It should be noted that, in the embodiment of the present invention, the acoustic black hole structure is disposed at the end portion of the limiter 100, and the acoustic black hole structure extends outwards, so that the wave gathering and decelerating position occurs at the outermost end of the limiter 100 far away from the mounting portion 110, and the outermost end is least constrained by the structure, so that deformation is easier to be implemented, and the acoustic black hole effect is easier to occur.

Referring to fig. 1, it will be appreciated that, in a certain installation space, the overall length of the limiter 100 is limited within a certain size range, and the vibration-damping segment 121 may be disposed to extend toward the installation portion 110, that is, the vibration-damping segment 121 occupies more position on the limiting portion 120, and the specific length of the vibration-damping segment 121 may be set according to practical application requirements. Considering that the thickness of the vibration reduction section 121 may change in a gradual decreasing manner, in order to ensure the reliability of the connection structure between the stopper 100 and the exhaust valve seat 240, in an embodiment, the distance between the vibration reduction section 121 and the mounting hole 111 along the length direction cannot be too small, so that the vibration reduction section 121 is prevented from affecting the mounting structure of the stopper 100.

Specifically, the distance between the origin of the vibration reduction section 121 and the central axis of the mounting hole 111 is understood to be the distance between the vibration reduction section 121 and the mounting hole 111, with the central axis of the mounting hole 111 as a reference line, and the distance is d, and satisfies d.gtoreq.5 mm, for example, the distance between the vibration reduction section 121 and the mounting hole 111 may be 5mm, 8mm, or the like.

Referring to FIGS. 1 and 3, in some embodiments, the thickness of the vibration reduction section 121 gradually decreases in power of the length direction, the thickness of the right-most end of the vibration reduction section 121 is set to h1, and h 1. Gtoreq.0.1 mm is satisfied, that is, the thickness of the thinnest position of the vibration reduction section 121 is 0.1mm or more. It can be understood that, because the vibration reduction section 121 is a thin-walled structure formed by decreasing the power exponent, the thin-walled structure becomes thinner and thinner, and the thickness at the end of the vibration reduction section 121 can be also understood as a truncated thickness, and the larger the truncated thickness is, the larger the reflection coefficient of the corresponding structure is, the larger the vibration radiation noise of the structure is, and therefore, the smaller the truncated thickness is, the better the noise reduction effect is. Considering that the stability of the thin-wall structure is affected by too small thickness, the thickness of the end part of the vibration reduction section 121 needs to be kept above 0.1mm, so that the structure is more stable and reliable.

Referring to fig. 4, an extension section 123 extending along the length direction of the limiter 100 is provided at the end of the vibration reduction section 121, that is, the thinnest position of the vibration reduction section 121 extends outwards to form the extension section 123, so that the vibration reduction section 121 and the extension section 123 are formed at the end of the limiter 100, wherein the thickness of the vibration reduction section 121 is reduced by power exponent along the length direction, the vibration reduction section 121 is an acoustic black hole structure, and the specific structure and noise reduction principle of the vibration reduction section 121 can be described in the embodiment shown in fig. 1 and will not be described herein. Since the vibration reduction section 121 has a certain cut-off thickness, the embodiment compensates the vibration reduction effect by adding the extension section 123 at the end of the vibration reduction section 121, and reduces the influence of the cut-off thickness on the vibration reduction effect.

Specifically, the extension section 123 is added to the end of the vibration reduction section 121, and considering that the extension section 123 is connected to the position where the thickness of the vibration reduction section 121 is the smallest, the thickness of the extension section 123 is consistent with the thickness of the thinnest position of the vibration reduction section 121, so that the extension section 123 and the vibration reduction section 121 can be connected in a smooth transition manner, that is, the cut-off thickness is consistent with the thickness of the extension section 123. The propagation speed of the wave can be reduced along with the reduction of the power exponent of the thickness, the wave can be transmitted to the extension section 123 along the vibration reduction section 121 by increasing the extension section 123, on one hand, the propagation speed of the wave can further consume the energy of the wave along with the extension of the extension section 123, the vibration reduction and noise reduction effects are better, and on the other hand, the extension section 123 is favorable for improving the structural stability of the tail end of the vibration reduction section 121, and the reliability is higher.

Referring to fig. 4, in the embodiment, the thickness of the extension section 123 is consistent with the thickness of the end of the vibration reduction section 121, and the thickness of the extension section 123 is uniformly distributed along the length direction, that is, the extension section 123 is provided with equal thickness, for example, the thickness of the vibration reduction section 121 is reduced in power exponent, the thickness of the end of the vibration reduction section 121 is 0.15mm, the thickness of the extension section 123 is also set to 0.15mm, and the extension section 123 extends outwards for a distance, so that the outermost end of the limiter 100 extends further outwards, and thus the limiter is less constrained by the structure, and the design is more reasonable. The length of the extension 123 may be set according to practical requirements, and is not limited in detail.

Referring to fig. 6, fig. 6 is a graph showing the comparison effect of vibration frequencies corresponding to different cut-off thicknesses, specifically, the vibration frequencies corresponding to the cut-off thickness of 0.2mm and the cut-off thickness of 0.5mm are compared, wherein an extension section 123 is further added to the end of the vibration reduction section 121 with the cut-off thickness of 0.5mm, and the length of the extension section 123 is 12mm, that is, the vibration reduction section 121 with the cut-off thickness of 0.5mm is compensated by the extension section 123. It will be appreciated that by matching the extension 123 of 12mm with a truncated thickness of 0.5mm, a vibration amplitude approaching that of a truncated thickness of 0.2mm can be generated, and therefore, the vibration reduction effect reduced by the large-sized truncated thickness can be compensated for by increasing the extension 123.

Referring to fig. 5, in some embodiments, the curved surface of the vibration reduction section 121, which varies in power, is covered with a damping material 124, and it is understood that the damping material 124 is capable of converting solid mechanical vibration energy into thermal energy for dissipation, and that the damping material 124 is capable of effectively reducing vibration and noise without changing its structure, and that the damping performance of the material is measured in terms of its ability to dissipate vibration energy, and that the criterion for evaluating the damping is the damping coefficient.

The damping material 124 used in the embodiment is a high damping material suitable for vibration reduction and noise reduction, and the high damping material can be directly covered on the surface of the vibration reduction section 121, so that the vibration reduction and noise reduction effects can be realized. The high damping material may be connected to the vibration reduction section 121 by bonding or elastic connection, for example, the high damping material may be rubber, foam plastic, or a composite material formed by combining two or more different materials, and the high damping material is adhered to the surface of the vibration reduction section 121.

It can be understood that the thickness of the vibration reduction section 121 changes according to the law of gradually decreasing the power exponent, so that the propagation speed of the wave can be effectively reduced, and the purpose of suppressing the sound radiation is achieved, thereby reducing the noise in the middle-high frequency band, effectively reducing the vibration response generated when the valve plate beats the limiter 100, consuming the vibration energy by combining the damping material 124, suppressing the vibration of the limiter 100, and further improving the vibration reduction effect.

A compressor according to an embodiment of the present invention, which is a rotary compressor to which the stopper 100 of the above-described embodiment is applied, will be described with reference to fig. 7 to 8, and the compressor will be described with specific examples.

Referring to fig. 7, the compressor provided in the embodiment includes a compression mechanism 200 and a rotor assembly (not shown in the drawing), wherein the compression mechanism 200 includes a cylinder 210 and two bearings, the two bearings are respectively located at two sides of the cylinder 210 in an axial direction and define a compression cavity in the cylinder 210, the bearing at the upper end of the cylinder 210 is an upper bearing 220, the bearing at the lower end is a lower bearing 230, a piston is disposed in the cylinder 210, and the rotor assembly drives the piston to rotate in the compression cavity through a crankshaft 250, and supports the crankshaft 250 through the upper bearing 220 and the lower bearing 230. The upper bearing 220 is provided with an exhaust valve seat 240, an exhaust hole 242 communicated with the compression cavity is formed in the exhaust valve seat 240, an exhaust valve plate 241 is arranged on the exhaust valve seat 240, the limiter 100 is connected with the exhaust valve seat 240, the exhaust valve plate 241 is located between the limiter 100 and the exhaust hole 242, and the exhaust hole 242 can be opened or closed through the exhaust valve plate 241.

Referring to fig. 7 and 8, the stopper 100 is connected to the exhaust valve seat 240 by the mounting portion 110, and the stopper portion 120 extends in the longitudinal direction and is located above the exhaust valve plate 241, and the stopper portion 120 regulates the position of the exhaust valve plate 241. Wherein, set up vibration damper 121 at the right-hand member of spacing portion 120, the rule that the thickness of this vibration damper 121 was reduced along length direction is power exponent, utilize the acoustic black hole effect, can reduce the propagation velocity of wave in the structure through vibration damper 121, gather the wave of well high frequency channel in the region of acoustic black hole, thereby reduce well high frequency channel noise, play the effect of restraining sound radiation in the structure, can effectively attenuate the vibration response that exhaust valve piece 241 slaps stopper 100 and produce, play effectual vibration damping noise reduction effect.

It should be noted that, an extension section 123 may be added at the end of the vibration reduction section 121, and the vibration reduction and noise reduction effect may be improved by adding the extension section 123 to further consume energy of the wave; the damping material 124 may be further added on the surface of the vibration reduction section 121, and the acoustic black hole structure and the damping material 124 are combined to more effectively consume vibration energy, inhibit vibration of the limiter 100, and further improve vibration reduction and noise reduction effects, and specifically, the embodiments shown in fig. 3 and fig. 4 may be referred to, and will not be described herein.

The embodiment of the invention also provides refrigeration equipment (not shown in the attached drawings), which can be household appliances such as an air conditioner, a refrigerator and the like, and the refrigeration equipment is applied to the compressor of the embodiment. The refrigeration equipment adopts all the technical schemes of the compressor of the embodiment, so that the refrigeration equipment at least has all the beneficial effects brought by the technical schemes of the embodiment, and the description is omitted.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. A stopper of a compressor, the compressor including an exhaust valve seat and an exhaust valve sheet, the exhaust valve seat being provided with an exhaust hole, the exhaust valve sheet being used for opening or closing the exhaust hole, the stopper comprising:

a mounting portion connected to the exhaust valve seat;

wherein, spacing portion is kept away from the one end of installation department is equipped with the damping section, the thickness orientation of damping section is kept away from the direction of installation department reduces gradually, the thickness of damping section is followed the length direction of stopper is the power exponent and reduces gradually, and satisfies power exponent curve h=a x ^m Wherein h is the thickness of the vibration reduction section, A is a curve coefficient, x is the distance along the length direction of the limiter, m is a power exponent and is more than or equal to 2, and the area on the vibration reduction section, which is changed by the power exponent, is an acoustic black hole area.

2. Limiter according to claim 1, wherein the profile curve of the upper and/or lower surface of the vibration reduction section in the thickness direction is the power exponent curve.

3. The limiter according to claim 1 wherein the thickness of the end of the vibration reduction section remote from the mounting portion is h1 and satisfies h1 ≡0.1mm.

4. A limiter according to claim 3 wherein the end of the damper section is provided with an extension extending along the length of the limiter.

5. The stop of claim 4, wherein the extension is provided with a constant thickness.

6. The stop of claim 1, wherein the surface of the damper segment is provided with a damping material.

7. The limiter of claim 1, wherein the mounting portion is provided with a mounting hole, and a distance between the vibration reduction section and the mounting hole along a length direction of the limiter is d, and d is greater than or equal to 5mm.

8. A compressor comprising a stopper according to any one of claims 1 to 7.

9. A refrigeration apparatus comprising the compressor of claim 8.