Muffler and compressor comprising same

Abstract

The application provides a silencer and a compressor comprising the same, relates to the technical field of compressors, and solves the technical problem of poor silencing effect of the silencer. The silencer comprises a silencing body arranged on a flange, the silencing body has a resonance cavity, the resonance cavity is communicated with an exhaust port of the flange; the resonance cavity is formed by at least two unit cavities in series, all the unit cavities comprise at least two unit cavities with different heights and / or widths; the compressor comprises the flange and the silencer arranged on the flange. The application forms a plurality of resonance cavities with different volumes by arranging the resonance cavity into a plurality of unit cavities with different heights and / or widths. When the airflow enters the resonance cavity, the resonance cavity will vibrate, so that the airflow consumes sound energy by overcoming frictional resistance. Since the resonance cavities with different widths and / or heights are arranged in series, the resistance of the airflow is further increased, the aerodynamic noise of the high-pressure refrigerant is reduced, and the silencing effect of the silencer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the compressor technical field, especially to a silencer and a compressor comprising the same. BACKGROUND

[0002] The existing compressor is generally provided with a double-layer silencer, and the silencing process is that the gas is discharged from the flange exhaust port into the cavity between the inner layer silencer and the flange for silencing, and then is subjected to secondary silencing through the cavities of the inner layer silencer and the outer layer silencer.

[0003] As shown in Figure 1 and Figure 2 , the double-layer silencer comprises an outer layer silencer 22 and an inner layer silencer 21, the outer layer silencer 22 is fixed on the auxiliary bearing 1, the inner layer silencer 21 is arranged in the outer layer silencer 22 to separate the space in the outer layer silencer 22 into a gas interlayer 202 and an inner cavity 201, the inner layer silencer 21 is provided with a central through hole, the hub 11 of the auxiliary bearing 1 extends into the gas interlayer 202 through the central through hole, the inner cavity 201 is in communication with the exhaust passage 102, the gas interlayer 202 is spaced apart from the exhaust passage 102 through the inner layer silencer 21, and the gas interlayer 202 is in communication with the inner cavity 201 through the communication hole 203; the outer layer silencer 22 is provided with a sidelobe resonance cavity in the circumferential direction, and the sidelobe resonance cavity is directly communicated with the main cavity of the outer layer silencer 22.

[0004] The applicant finds that the prior art at least has the following technical problems:

[0005] In the prior art, the cavity formed between the inner layer silencer 21 and the outer layer silencer 22 is flat, which causes the double-layer silencer of the existing compressor to have the problem that part of the low-frequency noise cannot be eliminated, and the silencer has poor silencing effect. SUMMARY

[0006] The present application aims to provide a silencer and a compressor comprising the same to solve the technical problem of poor silencing effect of the silencer in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] The silencer provided by the present application comprises a silencer body arranged at a position to be silenced, the silencer body has a resonance cavity therein, and the resonance cavity is in communication with an exhaust port of the position to be silenced; the resonance cavity is formed by at least two unit cavities in series, and all the unit cavities include at least two unit cavities with different heights and / or different widths.

[0009] On the basis of the above technical solutions, the present application can be further improved as follows.

[0010] As a further improvement of the present application, all of the unit cavities are arranged in sequence along the radial direction of the sound attenuation body.

[0011] As a further improvement of the present application, the sound attenuation body is a double-layer sound attenuation structure, comprising an inner layer sound attenuation member and an outer layer sound attenuation member arranged in sequence, a first resonance cavity is defined between the outer layer sound attenuation member and the inner layer sound attenuation member, and a second resonance cavity is defined between the inner layer sound attenuation member and the position to be attenuated, the first resonance cavity and / or the second resonance cavity is composed of at least two unit cavities with different heights and / or different widths, and the inner layer sound attenuation member is provided with a communication hole.

[0012] As a further improvement of the present application, at least one of the unit cavities in the first resonance cavity protrudes from the contact surface of the outer layer sound attenuation member and the position to be attenuated.

[0013] As a further improvement of the present application, at least one first groove is formed on the inner layer sound attenuation member in the axial direction, the first resonance cavity is divided into a plurality of unit cavities by the first groove, and the second resonance cavity is divided into a plurality of unit cavities by the first groove.

[0014] As a further improvement of the present application, at least one second groove is formed on the outer layer sound attenuation member in the axial direction, all of the first grooves and all of the second grooves are arranged one by one or staggered with each other, the first resonance cavity is divided into a plurality of unit cavities by the second groove and the first groove, and the second resonance cavity is divided into a plurality of unit cavities by the second groove and the first groove.

[0015] As a further improvement of the present application, the width and / or height of the first groove and the second groove are the same or different.

[0016] As a further improvement of the present application, the width and / or height of all of the first grooves are the same or different, and / or the width and / or height of all of the second grooves are the same or different.

[0017] As a further improvement of the present application, the communication hole is arranged beside the first groove, on the side wall of the first groove, or on the bottom wall of the first groove.

[0018] The present application provides a compressor comprising a flange and the sound attenuator arranged on the flange.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The silencer provided by the application can greatly reduce the aerodynamic noise of high-pressure refrigerant and improve the silencing effect of the silencer by setting the resonance cavity into multiple unit cavities with different heights and / or widths, i.e. forming multiple resonance cavities with different volumes, so that the resonance cavity vibrates when the airflow enters the resonance cavity, thereby making the airflow consume sound energy by overcoming frictional resistance, and the resistance of the airflow passing through is further increased due to the series connection of the resonance cavities with different widths and / or heights.

[0021] In further improved embodiments of the application, the conventional double-layer silencer is improved by setting recesses in the inner layer of the silencer and corresponding to the recesses of the outer layer of the silencer, so that multiple resonance cavities are formed between the inner silencer and the outer silencer, and the volume of the resonance cavities is enlarged, thereby improving the silencing capacity of the silencer. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0023] Figure 1 is a sectional view of a double-layer silencer without a sidelobe structure in the prior art;

[0024] Figure 2 is a bottom view of a double-layer silencer with a sidelobe structure in the prior art;

[0025] Figure 3 is a top view of the silencer of the application;

[0026] Figure 4 is a sectional view of a first embodiment of the silencer of the application;

[0027] Figure 5 is a sectional view of a second embodiment of the silencer of the application;

[0028] Figure 6 is a sectional view of a third embodiment of the silencer of the application;

[0029] Figure 7 is a sectional view of a fourth embodiment of the silencer of the application.

[0030] In the figure, 21, inner silencer; 22, outer silencer; 201, inner cavity; 202, gas interlayer; 203, connecting hole; 3, exhaust port; 4, inner silencer; 5, outer silencer; 6, connecting hole; 7, first groove; 8, second groove; 10, first resonance cavity; 20, second resonance cavity; 100, flange. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0032] The present invention provides a silencer, comprising a silencer body arranged at a position to be silenced, the silencer body having a resonance cavity therein, the resonance cavity being connected to an exhaust port 3 at the position to be silenced; the resonance cavity being formed by at least two unit cavities connected in series, and all the unit cavities including at least two unit cavities with different heights and / or different widths.

[0033] like Figure 2 As shown, in the prior art, the main cavity and the side lobe cavity in the first resonant cavity 10 of the outer layer silencer 5 are directly connected, and there is no step in the cavity connecting the two, and there is no sudden change in cavity volume; Figure 3 As shown, in the present invention, by setting a step or a step in the cavity connecting the main cavity and the side lobe cavity of the first resonance cavity 10 of the outer silencer 5, the cavity volume changes suddenly while the two cavities are connected.

[0034] As an optional implementation, all the unit cavities are arranged in sequence along the radial direction of the silencer body.

[0035] It should be noted that, in the present invention, a double-layer muffler installed on a compressor is used as an example for specific description, and the position to be silenced is the neck flange 100. The exhaust port 3 is provided on the disk surface of the flange 100 to discharge the high-pressure gas in the compressor into the muffler.

[0036] The silencer body is a double-layer silencer structure, including an inner silencer 4 and an outer silencer 5 arranged in sequence. The space enclosed between the outer silencer 5 and the inner silencer 4 is defined as a first resonance cavity 10, and the space enclosed between the inner silencer 4 and the end face of the flange 100 is defined as a second resonance cavity 20. The first resonance cavity 10 and / or the second resonance cavity 20 is composed of at least two unit cavities with different heights and / or widths. A connecting hole 6 is provided on the inner silencer, and the airflow in the second resonance cavity 20 enters the first resonance cavity 10 through the connecting hole 6.

[0037] As an optional embodiment, as shown in Figure 3 The first resonant cavity 10 of the outer layer muffler 5 is provided with a plurality of side lobe resonant cavities arranged in the circumferential direction, and the side lobe resonant cavities are in communication with the main chamber of the first resonant cavity 10.

[0038] Further, at least one unit cavity in the first resonant cavity 10 protrudes from the neck end surface of the flange 100.

[0039] Further, at least one first groove 7 is formed on the inner layer muffler 4 in the axial direction, and the first resonant cavity 10 is divided into a plurality of unit cavities through the first groove 7, and the second resonant cavity 20 is divided into a plurality of unit cavities through the first groove 7.

[0040] At least one second groove 8 is formed on the outer layer muffler 5 in the axial direction, and all the first grooves 7 and all the second grooves 8 are arranged one by one or staggered with each other; the first resonant cavity 10 is divided into a plurality of unit cavities through the second groove 8 and the first groove 7.

[0041] Specifically, all the first grooves 7 are the same or different in shape, and the first groove 7 can be rectangular, triangular, semicircular or semi-elliptical, etc.; all the second grooves 8 are the same or different in shape, and the second groove 8 can be rectangular, circular, triangular, semicircular or semi-elliptical, etc.; the shapes of the first groove 7 and the second groove 8 can be the same or different.

[0042] Further, the width and / or height of the first groove 7 and the second groove 8 are the same or different.

[0043] Further, the width and / or height of all the first grooves 7 are the same or different; and / or, the width and / or height of all the second grooves 8 are the same or different.

[0044] That is, the following combinations are included: the outer layer muffler 5 and the inner layer muffler 4 are provided with grooves at the same time, and the grooves are arranged correspondingly; the outer layer muffler 5 and the inner layer muffler 4 are provided with grooves at the same time, and the grooves are not arranged correspondingly; the outer layer muffler 5 and the inner layer muffler 4 are provided with grooves, and the grooves are uniformly distributed along the circumference of the muffler; the shape of the groove can be one or more of rectangular, circular, triangular, semicircular, semi-elliptical.

[0045] Embodiment 1:

[0046] As shown in Figure 3 and Figure 4As shown, in the present embodiment, the outer layer silencer 5 is fixed on the end face of the flange 100, and the inner wall of the middle part of the outer layer silencer 5 is attached to the end face of the neck part of the flange 100; the inner layer silencer 4 is arranged in the outer layer silencer 5 and located at the middle part of the neck part of the flange 100, the outer layer silencer 5 is circular in the top view projection, and a plurality of side lobe resonant cavities are arranged on the outer layer silencer 5 in the circumferential direction, and the side lobe resonant cavities are arranged in communication with the main cavity of the first resonant cavity 10 of the outer layer silencer 5; specifically, as shown in Figure 3 As shown, six side lobe resonant cavities are arranged, and the six side lobe resonant cavities are of the same specification, the inner layer silencer 4 is recessed downward to form six first recesses 7 corresponding to the positions of the six side lobe resonant cavities, the cross section of the first recess 7 is rectangular structure, and the six side lobe resonant cavities of the outer layer silencer 5 are protruded to form six second recesses 8 along the axial direction of the flange 100, and the cross section of the second recess 8 is rectangular structure; the specifications of the second recess 8 at different positions of the side lobe resonant cavities are the same; and the first recess 7 and the second recess 8 are arranged opposite to each other, thereby forming three unit cavities in the first resonant cavity 10, wherein the unit cavities on both sides of the second recess 8 are small in volume, the unit cavity formed at the position opposite to the first recess 7 and the second recess 8 is largest in volume, and the inner and outer unit cavities are arranged in a whole circle along the circumferential direction of the outer layer silencer 5, and the middle unit cavity with the largest volume is arranged in an array of six; since the second recess 8 is protruded outwardly from the outer layer silencer 5, the top of the second recess 8 exceeds the end face of the neck part of the flange 100, thereby increasing the volume of the resonant cavity and having better silencing effect.

[0047] In the present embodiment, the communication hole 6 is arranged on the inner layer silencer 4 at the inner side of the first recess 7.

[0048] Embodiment 2

[0049] As shown in Figure 3 and Figure 5 The difference between embodiment 2 and embodiment 1 is only that the arrangement position of the communication hole 6 is different, and in the present embodiment, the communication hole 6 is arranged on the left and right side walls of the first recess 7.

[0050] Embodiment 3

[0051] As shown in Figure 3 and Figure 6 The difference between embodiment 3 and embodiment 1 is only that the arrangement position of the communication hole 6 is different, and in the present embodiment, the communication hole 6 is arranged on the bottom wall of the first recess 7.

[0052] Embodiment 4

[0053] As shown in Figure 3 and Figure 7As shown, in the embodiment, the outer layer silencer 5 is fixed on the end face of the flange 100, and the inner wall of the middle part of the outer layer silencer 5 is attached to the end face of the neck part of the flange 100; the inner layer silencer 4 is arranged in the outer layer silencer 5 and located at the middle part of the neck part of the flange 100, the outer layer silencer 5 is circular in the top view projection figure, and a plurality of side lobe resonant cavities are arranged on the outer layer silencer 5 in the circumferential direction, and the side lobe resonant cavities are arranged in communication with the main cavity of the first resonant cavity 10 of the outer layer silencer 5; specifically, as shown in the figure, Figure 3 As shown, six side lobe resonant cavities are arranged, and the six side lobe resonant cavities are of the same specification, the inner layer silencer 4 is recessed downward to form six first recesses 7 corresponding to the positions of the six side lobe resonant cavities, and the cross sections of the six first recesses 7 are of two types, one is a rectangular structure, and the other is a stepped structure, the first recess 7 of the rectangular structure is located at the middle position of the annular inner layer silencer 4, and the first recess 7 of the stepped structure is located at the outer edge position of the inner layer silencer 4; the six side lobe resonant cavities of the outer layer silencer 5 are arranged in the radial direction of the flange 100, and the second recess 8 is formed at the top of the flange 100 in the axial direction corresponding to the position of the first recess 7 of the rectangular structure in the six side lobe resonant cavities, the number of the second recess 8 is the same as that of the first recess 7 of the rectangular structure, and the cross section of the second recess 8 is of a rectangular structure; the specifications of the second recess 8 at different positions of the side lobe resonant cavities are the same; thereby four unit cavities are formed in the first resonant cavity 10, wherein the unit cavities located on both sides of the second recess 8 are small in volume, the unit cavity located at the position of the first recess 7 of the stepped structure is slightly larger in volume, the unit cavity formed at the position opposite to the first recess 7 and the second recess 8 is the largest in volume, the two unit cavities with the smallest volume in the four unit cavities are arranged in a whole circle in the circumferential direction of the outer layer silencer 5, and the unit cavity with the largest volume is at least one arranged in the circumferential direction; the unit cavity with a slightly larger volume is at least one arranged in the circumferential direction; since the second recess 8 protrudes outward from the outer layer silencer 5, the top of the second recess 8 exceeds the end face of the neck part of the flange 100, thereby increasing the volume of the resonant cavity and having a better silencing effect.

[0054] In the embodiment, the communication hole 6 is arranged on the inner layer silencer 4 inside the first recess 7.

[0055] Embodiment 5:

[0056] The difference between the embodiment 5 and the embodiment 1, the embodiment 2, the embodiment 3 and the embodiment 4 is that, in the embodiment, the first recess 7 is not arranged corresponding to each side lobe resonant cavity, but is arranged in a whole circle in the circumferential direction of the inner layer silencer 4.

[0057] The compressor provided by the application comprises a flange 100 and a silencer arranged on the flange 100.

[0058] The silencer provided by the application can greatly reduce the aerodynamic noise of high-pressure refrigerant and improve the silencing effect of the silencer.

[0059] In further improved embodiments of the application, the conventional double-layer silencer is improved by providing recesses in the inner layer of the silencer and corresponding to the recesses of the outer layer of the silencer, so that a plurality of resonance cavities are formed between the inner silencer and the outer silencer, and the volume of the resonance cavities is enlarged, thereby improving the silencing capacity of the silencer.

[0060] First of all, it should be noted that "inward" refers to the direction towards the center of the accommodation space, and "outward" refers to the direction away from the center of the accommodation space.

[0061] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application. Figure 4

[0062] In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0063] In the application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.​

[0064] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0065] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does 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 one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the features of different embodiments or examples and different embodiments or examples described in the present application without contradiction.

[0066] The above description is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A muffler, comprising a muffler body disposed at a location to be silenced, the muffler body having a resonance cavity therein, the resonance cavity being communicated with an exhaust port at the location to be silenced; characterized in that: The resonant cavity is formed by connecting at least two unit cavities in series, and all the unit cavities include at least two unit cavities with different heights and / or widths; The muffler body is a double-layer muffler structure, including an inner muffler and an outer muffler arranged in sequence, a first resonance cavity is defined between the outer muffler and the inner muffler, and a second resonance cavity is defined between the inner muffler and the position to be silenced, the first resonance cavity and / or the second resonance cavity are composed of at least two unit cavities of different heights and / or widths, and a connecting hole is provided on the inner muffler; At least one first groove is formed on the inner muffler along the axial direction, the first resonance cavity is divided into a plurality of unit cavities by the first groove, and the second resonance cavity is divided into a plurality of unit cavities by the first groove; At least one second groove is formed on the outer silencer along the axial protrusion, and all the first grooves and all the second grooves are arranged opposite to each other or staggered with each other; the first resonance cavity is divided into multiple unit cavities by the second grooves and the first grooves.

2. The muffler according to claim 1, characterized in that All the unit cavities are arranged in sequence along the radial direction of the muffler body.

3. The muffler according to claim 1 or 2, characterized in that: The top of at least one of the unit cavities in the first resonance cavity protrudes from the contact surface between the outer silencer and the position to be silenced.

4. The muffler according to claim 3, characterized in that The width and / or height of the first groove and the second groove are the same as or different from each other.

5. The muffler according to claim 3, characterized in that The widths and / or heights of all the first grooves are the same or different; and / or the widths and / or heights of all the second grooves are the same or different.

6. The muffler according to claim 3, characterized in that The communicating hole is arranged beside the first groove, on the side wall of the first groove or on the bottom wall of the first groove.

7. A compressor, characterized in that: The utility model comprises a flange and a silencer according to any one of claims 1 to 6 arranged on the flange.

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