Silencer for air conditioner and air conditioner

Abstract

The utility model relates to the technical field of air conditioners, and discloses a silencer for an air conditioner. The silencer comprises a shell, a silencing cavity is defined by the shell, a silencing cavity inlet and a silencing cavity outlet are oppositely formed in the two ends, in the length direction, of the shell, and a plurality of first protrusions are arranged on the inner wall of the shell, protrude towards the silencing cavity and are spirally arranged in the length direction of the shell. The multiple first protrusions are arranged on the inner wall of the shell so that resistive noise reduction can be achieved, the multiple first protrusions are spirally arranged in the length direction of the shell, noise can be guided to be spread along a spiral path, the flowing path of the noise in the noise reduction cavity is increased, the spreading time of the noise in the noise reduction cavity is prolonged, the sound wave absorption effect of the noise in the noise reduction cavity is improved, and the noise reduction effect is improved. And meanwhile, the multiple first protrusions are spirally arranged on the inner wall of the shell, the space in the silencing cavity can be fully utilized through compact arrangement under the condition that the external size is kept unchanged, and therefore occupied space is saved, and the space utilization efficiency is improved. The utility model further discloses the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to a muffler for an air conditioner and the air conditioner. Background Art

[0002] When the air conditioner is in operation, the flow of refrigerant will transmit a lot of noise, so noise reduction has become a research and development focus.

[0003] The related technology discloses a muffler, comprising: a shell, the shell is provided with an inlet and an outlet, a part of the peripheral wall of the shell is recessed inward to define a plurality of annular recessed portions, and the plurality of recessed portions are distributed at intervals in the length direction of the shell, so that the noise generated by the compressor can be reduced to a certain extent after passing through the muffler.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In the related art, the silencer achieves sound insulation and noise reduction by recessing a portion of the circumferential wall of the shell inward to form a plurality of annular recessed portions. When the system transmits a large amount of noise, it is necessary to increase the lateral cross-sectional area of ​​the plurality of recessed or protruding portions, or to increase the number of recessed portions. This will cause the size of the silencer to be too large and occupy too much space in the press chamber.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides a muffler for an air conditioner and the air conditioner, so as to improve the muffler effect and save the occupied space of the muffler.

[0009] According to a first aspect of an embodiment of the utility model, a silencer for an air conditioner is provided, comprising: a shell, enclosing a silencer cavity, a silencer cavity inlet and a silencer cavity outlet being provided at opposite ends of the shell along the length direction, a plurality of first protrusions being provided on the inner wall of the shell, the plurality of first protrusions protruding toward the silencer cavity and being arranged in a spiral shape along the length direction of the shell.

[0010] Optionally, the first protrusion extends along the circumference of the housing.

[0011] Optionally, the inner wall of the shell is further provided with a plurality of second protrusions, which protrude toward the silencer cavity and are arranged at intervals along the length direction of the shell; wherein an angle exists between the extension direction of the first protrusion along the inner wall of the shell and the extension direction of the second protrusion along the inner wall of the shell.

[0012] Optionally, the second protrusions extend along the circumference of the shell, and the plurality of first protrusions and the plurality of second protrusions are arranged alternately.

[0013] Optionally, the plurality of second protrusions are arranged in a spiral shape along the length direction of the shell.

[0014] Optionally, the inner wall of the shell is provided with a plurality of first recesses extending in a clockwise spiral direction from the inlet of the silencer chamber toward the outlet of the silencer chamber, a first protrusion is formed between every two adjacent first recesses, and the plurality of first recesses form a first internal thread; the inner wall of the shell is also provided with a plurality of second recesses extending in a counterclockwise spiral direction from the inlet of the silencer chamber toward the outlet of the silencer chamber, a second protrusion is formed between every two adjacent second recesses, and the plurality of second recesses form a second internal thread; wherein the first internal thread and the second internal thread intersect correspondingly to form a mesh protrusion structure.

[0015] Optionally, the ratio of the protrusion height of the first protrusion to the shell thickness is greater than or equal to 0.5 and less than or equal to 1; and / or the ratio of the protrusion height of the second protrusion to the shell thickness is greater than or equal to 0.5 and less than or equal to 1.

[0016] Optionally, the spacing between adjacent first protrusions and second protrusions is greater than or equal to 3 mm and less than or equal to 5 mm.

[0017] Optionally, the silencer further includes: an inlet duct connected to the shell at the inlet end of the silencer chamber; an outlet duct connected to the shell end at the outlet end of the silencer chamber; wherein the radial cross-section of the shell is larger than the radial cross-section of the inlet duct and the radial cross-section of the outlet duct.

[0018] According to a second aspect of an embodiment of the utility model, an air conditioner is provided, comprising: a compressor; a condenser; a muffler for the air conditioner as described in any one of the above embodiments, arranged at the air outlet of the compressor and / or the air inlet of the condenser.

[0019] The silencer for an air conditioner and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] A plurality of first protrusions are arranged on the inner wall of the shell to form a sound-absorbing structure, which can achieve the effect of resistive sound-absorbing. The plurality of first protrusions are arranged in a spiral shape along the length direction of the shell, which can guide the noise to propagate along the spiral path, increase the flow path of the noise in the sound-absorbing cavity, thereby increasing the propagation time of the noise in the sound-absorbing cavity and the sound wave absorption effect, and further improve the sound-absorbing effect. At the same time, the plurality of first protrusions are arranged in a spiral shape on the inner wall of the shell, which can fully utilize the space in the sound-absorbing cavity through compact arrangement while keeping the external dimensions unchanged, thereby saving space occupation and improving space utilization efficiency.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic structural diagram of a silencer for an air conditioner provided by an embodiment of the present disclosure, wherein the direction indicated by the arrow is the length direction of the shell;

[0024] Figure 2 is a schematic structural diagram of another silencer for an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 3 yes Figure 2 The cross-sectional schematic diagram along the AA direction is shown;

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of portion B is shown;

[0027] Figure 5 yes Figure 2 A schematic cross-sectional view along the CC direction is shown.

[0028] Reference numerals:

[0029] 10: Shell; 11: Silence chamber; 12: Silence chamber inlet; 13: Silence chamber outlet;

[0030] 20: first protrusion; 21: first internal thread;

[0031] 30: second protrusion; 31: second internal thread;

[0032] 40: inlet duct;

[0033] 50: outlet conduit;

[0034] 60: first depression;

[0035] 70: Second depression. DETAILED DESCRIPTION

[0036] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0037] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0039] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0040] Unless otherwise stated, the term "plurality" means two or more.

[0041] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0042] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0044] At present, during the operation of the air conditioner, the movement of the refrigerant will transmit a lot of noise, and noise reduction has become a research and development focus.

[0045] The related art discloses a muffler, comprising: a shell, the shell is provided with an inlet and an outlet, a part of the peripheral wall of the shell is indented inward to define a plurality of annular recessed parts, and the plurality of recessed parts are spaced apart in the length direction of the shell, so that the noise generated by the compressor can be reduced to a certain extent after passing through the muffler. However, the muffler achieves noise reduction by providing a plurality of annular recessed parts. When the system transmits a large noise, it is necessary to increase the transverse cross-sectional area of ​​the plurality of recessed parts or protruding parts, or increase the number of recessed parts, which will cause the size of the muffler to be too large and occupy too much space in the compressor compartment.

[0046] Combination Figure 1-5 As shown, an embodiment of the present disclosure provides a muffler for an air conditioner, comprising a housing 10 .

[0047] The shell 10 is provided with a silencer cavity 11, and the two ends of the shell 10 along the length direction are provided with a silencer cavity inlet 12 and a silencer cavity outlet 13 opposite to each other. The inner wall of the shell 10 is provided with a plurality of first protrusions 20, and the plurality of first protrusions 20 protrude toward the silencer cavity 11 (such as Figure 5 As shown), and are arranged in a spiral shape along the length direction of the shell 10.

[0048] The shell length direction is Figure 1 Indicated by the direction of the arrow.

[0049] The silencer for the air conditioner provided by the embodiment of the present disclosure is provided with a plurality of first protrusions 20 on the inner wall of the shell 10 to form a silencer structure, which can achieve the effect of resistive silencer. The plurality of first protrusions 20 are arranged in a spiral shape along the length direction of the shell, which can guide the noise to propagate along the spiral path, increase the flow path of the noise in the silencer cavity, thereby increasing the propagation time of the noise in the silencer cavity 11 and the sound wave absorption effect, and further improve the silencer effect. At the same time, the plurality of first protrusions 20 are arranged in a spiral shape on the inner wall of the shell 10, which can fully utilize the space in the silencer cavity through compact arrangement while keeping the external dimensions unchanged, thereby saving space occupation and improving space utilization efficiency.

[0050] A plurality of first protrusions 20 protruding toward the silencer cavity 11 are arranged on the inner wall of the shell 10, which can increase the surface area in the silencer cavity 11, provide more absorption paths for the noise generated when the refrigerant flows, and the noise sound waves contact and rub against the first protrusions 20, which are converted into heat energy, and resistive silence can be achieved. The plurality of first protrusions 20 can also cause the noise sound waves to be reflected and scattered multiple times in the silencer cavity 11, reduce the linear propagation of the noise, increase the number of times the sound waves contact the inner wall of the shell 10, thereby increasing the probability of the noise sound waves being absorbed and effectively reducing the noise.

[0051] The silencer chamber inlet 12 and the silencer chamber outlet 13 are arranged relatively along the length direction of the shell 10, so that the refrigerant flows along the length direction of the shell 10. The plurality of first protrusions 20 are arranged in a spiral shape along the length direction of the shell 10, that is, they are arranged in a spiral shape along the flow direction of the refrigerant, and a concave-convex structure is formed between the plurality of first protrusions 20, which can extend the propagation path of the noise sound wave in the silencer chamber 11, enhance the attenuation effect of the sound wave energy, and also enable the noise sound wave to interfere in the silencer chamber 11, so that part of the sound wave energy cancels each other, thereby improving the resistive silencing effect.

[0052] The refrigerant flows into the silencer chamber 11 through the silencer chamber inlet 12 along the length direction of the shell 10 and then flows out from the silencer chamber outlet 13. A plurality of first protrusions 20 protruding toward the silencer chamber 11 are provided on the inner wall of the shell 10. The plurality of first protrusions 20 are arranged in a spiral shape along the length direction of the shell 10 to form a silencer structure distributed along the flow direction of the refrigerant. The noise generated when the refrigerant flows is converted into heat energy by friction with the first protrusions 20, which can increase the silencer volume of silencers of the same size, thereby saving the space occupied by the silencer, improving space utilization, and reducing material costs.

[0053] It can be understood that the first protrusion 20 can be a protrusion structure added to the inner wall of the shell 10, or a protrusion structure formed by directly removing local materials and setting adjacent recesses on the inner wall of the shell 10.

[0054] Optionally, combined Figure 3 As shown, the first protrusion 20 extends along the circumference of the housing 10 .

[0055] The refrigerant flows along the length direction of the shell 10, that is, along the axial direction of the shell 10. The first protrusion 20 extends along the circumferential direction of the shell 10, which means that the first protrusion 20 extends on the inner wall of the shell 10 in a direction other than the length direction of the shell 10, so that the extension direction of the first protrusion 20 is different from the flow direction of the refrigerant, which can increase the possibility of the noise caused by the refrigerant contacting the first protrusion 20, thereby improving the silencing effect.

[0056] The refrigerant flows along the length direction of the shell 10, and the first protrusion 20 extends along the circumference of the shell 10, which can increase the contact area between the noise sound waves caused by the refrigerant flow and the first protrusion 20, improve the absorption and scattering efficiency of the noise sound waves, and further improve the noise reduction effect of the muffler. At the same time, the first protrusion 20 extends along the circumference, which can make the sound waves on different paths interfere with each other, and through the phase difference between the sound waves, the energy is offset to reduce noise.

[0057] The first protrusion 20 extending in the circumferential direction can also enhance the structural strength and stability of the shell 10, so that the shell 10 can withstand the pressure and vibration caused by the flow of the refrigerant.

[0058] Optionally, combined Figure 3 As shown, the inner wall of the shell 10 is also provided with a plurality of second protrusions 30, which protrude toward the silencer chamber 11 and are arranged at intervals along the length direction of the shell 10; wherein, there is an angle between the extension direction of the first protrusion 20 along the inner wall of the shell 10 and the extension direction of the second protrusion 30 along the inner wall of the shell 10.

[0059] A plurality of second protrusions 30 protrude toward the muffler cavity 11 and are arranged at intervals along the length direction of the shell 10, and a concave-convex structure is formed between the plurality of second protrusions 30, which can achieve a resistive muffler effect. A plurality of first protrusions 20 and a plurality of second protrusions 30 are arranged on the inner wall of the shell 10, and an angle exists between the extension direction of the first protrusion 20 along the inner wall of the shell 10 and the extension direction of the second protrusion 30 along the inner wall of the shell 10, that is, the extension directions of the first protrusion 20 and the second protrusion 30 are different, forming a protrusion structure in multiple directions, which can absorb sound waves in multiple directions to form resistive muffler, and can also make the sound waves form multi-angle scattering, increase the number of scattering times of the sound waves in the muffler cavity 11, and thus improve the muffler effect.

[0060] It can be understood that the second protrusion 30 can be a protrusion structure added to the inner wall of the shell 10, or a protrusion structure formed by directly removing local materials and setting adjacent recesses on the inner wall of the shell 10.

[0061] Optionally, combined Figure 3 As shown, the second protrusions 30 extend along the circumference of the housing 10 , and a plurality of first protrusions 20 and a plurality of second protrusions 30 are arranged alternately.

[0062] The refrigerant flows along the length direction of the shell 10, that is, along the axial direction of the shell 10. The second protrusion 30 extends along the circumferential direction of the shell 10, which means that the second protrusion 30 extends on the inner wall of the shell 10 in a direction other than the length direction of the shell 10, so that the extension direction of the second protrusion 30 is different from the flow direction of the refrigerant, which can increase the possibility of the noise caused by the refrigerant contacting the second protrusion 30, thereby improving the silencing effect.

[0063] The multiple first protrusions 20 and the multiple second protrusions 30 are arranged in a staggered manner, which can make full use of the circumferential space of the inner wall of the shell 10, form a compact protrusion layout, reduce the invalid space not occupied by the protrusion structure, and make more efficient use of the internal space of the silencer cavity, thereby achieving a better sound-absorbing effect in a limited space. The multiple first protrusions 20 and the multiple second protrusions 30 arranged in a staggered manner absorb and scatter sound waves from multiple directions, which can increase the number of absorption and scattering of sound waves in the silencer cavity 11, thereby improving the noise reduction performance of the silencer.

[0064] The first protrusions 20 and the second protrusions 30 are both arranged at intervals along the length direction of the shell 10 and extend along the circumference of the shell 10. The multiple first protrusions 20 and the multiple second protrusions 30 are staggered, which can more effectively achieve resistive sound insulation and improve the noise reduction effect.

[0065] Optionally, combined Figure 3 As shown, a plurality of second protrusions are arranged in a spiral shape along the length direction of the shell.

[0066] Multiple second protrusions are arranged in a spiral shape along the length direction of the shell, and there is an angle between the extension direction of the first protrusion along the inner wall of the shell and the extension direction of the second protrusion along the inner wall of the shell, so that the multiple first protrusions and the multiple second protrusions form two groups of spiral silencer structures on the inner wall of the shell, which can improve the silencer effect.

[0067] Optionally, combined Figure 3-4 As shown, the inner wall of the shell 10 is provided with a plurality of first recesses 60 extending in a clockwise spiral along the direction of the silencer chamber inlet 12 toward the silencer chamber outlet 13, a first protrusion 20 is formed between every two adjacent first recesses 60, and the plurality of first recesses 60 form a first internal thread 21; the inner wall of the shell 10 is also provided with a plurality of second recesses 70 extending in a counterclockwise spiral along the direction of the silencer chamber inlet 12 toward the silencer chamber outlet 13, a second protrusion 30 is formed between every two adjacent second recesses 70, and the plurality of second recesses 70 form a second internal thread 31; wherein the first internal thread 21 and the second internal thread 31 intersect with each other correspondingly to form a mesh protrusion structure.

[0068] The first recess 60 and the second recess 70 are both recess structures formed by directly removing a portion of material from the inner wall of the housing 10 .

[0069] like Figure 4 As shown, the dotted lines indicate the spiral extension directions of the first internal thread 21 and the second internal thread 31 respectively.

[0070] A plurality of first recesses 60 form a clockwise spiral on the inner wall of the shell 10 along the direction from the muffler chamber inlet 12 to the muffler chamber outlet 13, forming a first internal thread 21, and a first protrusion 20 is formed between every two adjacent first recesses 60. A plurality of second recesses 70 form a counterclockwise spiral on the inner wall of the shell 10 along the direction from the muffler chamber inlet 12 to the muffler chamber outlet 13, forming a second internal thread 31, and a second protrusion 30 is formed between every two adjacent second recesses 70. The first thread and the second thread are interlaced to form a mesh protrusion structure, which can increase the arrangement density between the first protrusion 20 and the second protrusion 30, providing a larger sound absorption surface area. When the sound wave passes through these protrusions, more sound energy is converted into heat energy, effectively increasing the resistive sound silencing capability, and can increase the absorption effect of noise sound waves in the muffler chamber 11, thereby improving the sound silencing capability.

[0071] The mesh-like protrusion structure formed by the corresponding intersection of the first internal thread 21 and the second internal thread 31 is a diamond-shaped protrusion structure arranged along the thread paths of the first internal thread 21 and the second internal thread 31 .

[0072] Optionally, a ratio of a protruding height of the first protrusion 20 to a thickness of the housing 10 is greater than or equal to 0.5 and less than or equal to 1.

[0073] When the ratio of the protruding height of the first protrusion 20 to the thickness of the shell 10 is greater than or equal to 0.5, it can provide sufficient scattering and absorption area for noise sound waves, increase the amount of sound insulation, and effectively reduce the turbulence and eddy current of the refrigerant, thereby improving the sound insulation effect.

[0074] When part of the material is directly removed from the inner wall of the shell 10 to form a plurality of first depressions, and the first protrusion 20 is a protruding structure formed by adjacent first depressions, the surface of the first protrusion 20 is consistent with the surface height of the inner wall of the shell 10, and the protruding height of the first protrusion 20 is the depth of the first depression. Since the maximum value of the depth of the first depression is the thickness of the shell 10, the ratio of the protruding height of the first protrusion 20 to the thickness of the shell 10 needs to be less than or equal to 1.

[0075] When the ratio of the protruding height of the first protrusion 20 to the thickness of the shell 10 is less than or equal to 1, the local strength of the shell 10 can be improved, preventing the shell 10 from deforming under pressure or refrigerant flow impact, and reducing the resistance to refrigerant flow, avoiding system efficiency reduction and additional energy consumption.

[0076] The ratio of the protruding height of the first protrusion 20 to the thickness of the shell 10 is limited to be greater than or equal to 0.5 and less than or equal to 1, which can improve the strength of the shell 10 and the noise reduction effect.

[0077] Optionally, a ratio of a protruding height of the second protrusion 30 to a thickness of the housing 10 is greater than or equal to 0.5 and less than or equal to 1.

[0078] When the ratio of the protruding height of the second protrusion 30 to the thickness of the shell 10 is greater than or equal to 0.5, it can provide sufficient scattering and absorption area for noise sound waves, increase the amount of sound insulation, and effectively reduce the turbulence and eddy current of the refrigerant, thereby improving the sound insulation effect.

[0079] When part of the material is directly removed from the inner wall of the shell 10 to form a plurality of second recesses, and the second protrusion 30 is a protruding structure formed by adjacent second recesses, the surface of the second protrusion 30 is consistent with the surface height of the inner wall of the shell 10, and the protruding height of the second protrusion 30 is the depth of the second recess. Since the maximum value of the depth of the second recess is the thickness of the shell 10, the ratio of the protruding height of the second protrusion 30 to the thickness of the shell 10 needs to be less than or equal to 1.

[0080] When the ratio of the protruding height of the second protrusion 30 to the thickness of the shell 10 is less than or equal to 1, the local strength of the shell 10 can be improved, preventing the shell 10 from deforming under pressure or refrigerant flow impact, and reducing the resistance to refrigerant flow, avoiding system efficiency reduction and additional energy consumption.

[0081] The ratio of the protruding height of the second protrusion 30 to the thickness of the shell 10 is limited to be greater than or equal to 0.5 and less than or equal to 1, which can strike a balance between the strength of the shell 10 and the noise reduction effect, while achieving higher shell 10 strength and better noise reduction effect.

[0082] Optionally, the protrusion height of the first protrusion 20 and / or the second protrusion 30 is 1 mm, so that the influence on the flow of the refrigerant can be ignored and the noise can be reduced at the same time.

[0083] Optionally, the interval between adjacent first protrusions 20 and second protrusions 30 is greater than or equal to 3 mm and less than or equal to 5 mm.

[0084] When the spacing between adjacent first protrusions 20 and second protrusions 30 is greater than or equal to 3 mm, sufficient contact space can be provided between the sound wave and the first protrusion 20 or the sound wave and the second protrusion 30, thereby improving the absorption effect of the sound wave, thereby reducing noise and reducing the resistance to the flow of the refrigerant.

[0085] When the spacing between adjacent first protrusions 20 and second protrusions 30 is less than or equal to 5 mm, the arrangement density of the first protrusions 20 and the second protrusions 30 can be increased, thereby improving the silencing effect. The ineffective space of the silencing cavity 11 can also be reduced, and the first protrusions 20 and the second protrusions 30 are arranged compactly, thereby improving the utilization efficiency of the space.

[0086] The spacing between adjacent first protrusions 20 and second protrusions 30 is greater than or equal to 3 mm and less than or equal to 5 mm, which can allow the sound waves in the silencing cavity 11 to have enough space for reflection and scattering, while avoiding the reduction of the silencing effect due to excessive spacing.

[0087] By increasing the protruding height of the first protrusion 20 and / or the second protrusion 30, or by reducing the spacing between the first protrusion 20 and the second protrusion 30 to increase the arrangement density between the first protrusion 20 and the second protrusion 30, the resistive silencing capability can be effectively increased and the silencing capability can be more effectively improved.

[0088] It can be understood that when the inner wall of the housing 10 is provided with only a plurality of first protrusions 20, the spacing between adjacent first protrusions 20 is greater than or equal to 3 mm and less than or equal to 5 mm. When the inner wall of the housing 10 is provided with only a plurality of second protrusions 30, the spacing between adjacent second protrusions 30 is greater than or equal to 3 mm and less than or equal to 5 mm.

[0089] Optionally, combined Figure 1-2 As shown, the muffler also includes an inlet duct 40 and an outlet duct 50. The inlet duct 40 is connected to the shell 10 at the inlet 12 end of the muffler chamber; the outlet duct 50 is connected to the shell 10 at the outlet 13 end of the muffler chamber; wherein the radial cross-section of the shell 10 is larger than the radial cross-section of the inlet duct 40 and the radial cross-section of the outlet duct 50.

[0090] The radial cross-section of the shell 10 is larger than the radial cross-sections of the inlet duct 40 and the outlet duct 50 , so that a reactive muffler is formed between the shell 10 and the inlet duct 40 and the outlet duct 50 , thereby improving the overall noise reduction performance of the muffler.

[0091] Resistant silencers achieve the purpose of noise reduction by utilizing the sound reflection effect at the sudden change of acoustic properties in the pipeline, such as the sudden expansion (or contraction) of the pipeline cross section or the bypass resonance loop, so that part of the noise propagating along the pipeline is reflected back to the sound source at the sudden change point instead of passing through the silencer. Resistive silencers achieve the purpose of noise reduction by arranging sound-absorbing materials or sound-absorbing structures in the pipeline using a device, so that the noise propagating along the pipeline is continuously absorbed. The disclosed embodiment combines these two noise reduction methods to provide a composite silencer that can be used in air conditioners, forming an expansion silencer with a raised structure on the inner wall of the shell 10. On the basis of the same volume and the same material cost, it has a better noise reduction effect and is suitable for use in small refrigerant systems such as household air conditioners.

[0092] Optionally, the shell 10 is provided with a tapered structure at the silencer chamber inlet 12 and the silencer chamber outlet 13, and the tapered structure includes a first tapered opening and a second tapered opening. The first tapered opening is provided at the silencer chamber inlet 12, and the first tapered opening smoothly transitions along the silencer chamber inlet 12 toward the inlet duct 40 and the size gradually decreases; the second tapered opening is provided at the silencer chamber outlet 13, and the second tapered opening smoothly transitions along the silencer chamber outlet 13 toward the outlet duct 50 and the size gradually decreases.

[0093] The shell 10 is provided with a constriction structure at the silencer chamber inlet 12 and the silencer chamber outlet 13 to reduce the noise generated when the refrigerant enters and flows out of the silencer. The smooth transition of the constriction structure can reduce the refrigerant flow resistance, thereby reducing the noise.

[0094] The processing method of a silencer for an air conditioner provided by the embodiment of the present disclosure is to cut a thick tube of appropriate length as the shell 10, for example, the shell 10 is 100 mm long, 25 cm in diameter, and 1.2 mm thick, and the shell 10 is fixed by a robot arm, and a thread cutter with a height of 0.2 mm is screwed in clockwise from the entrance 12 of the silencer chamber, and after the inner wall of the shell 10 forms a first inner thread 21 with a height of 0.2 mm clockwise, a thread cutter with a height of 0.2 mm is screwed in counterclockwise from the entrance 12 of the silencer chamber, so that the inner wall of the shell 10 forms an orderly distributed mesh convex structure with a height of 0.2 mm, forming a resistive silencer structure. Then, the shell 10 is narrowed at both ends along the length direction to form an inlet duct 40 and an outlet duct 50 with a radial cross section smaller than the radial cross section of the shell 10, respectively, to make an expansion silencer with a thin port and a thick middle.

[0095] An embodiment of the present disclosure provides an air conditioner, comprising a silencer for the air conditioner as described in any one of the above disclosed embodiments.

[0096] The air conditioner provided by the embodiment of the present disclosure includes the silencer for an air conditioner as described in any one of the above disclosed embodiments, and thus has all the beneficial effects of the silencer for an air conditioner as described in any one of the above disclosed embodiments, which will not be repeated here.

[0097] The air conditioner includes a compressor, a condenser, an evaporator and a refrigerant pipe. The silencer compressor for the air conditioner as described in any of the above-mentioned disclosed embodiments can be arranged at the outlet of the compressor, or at the inlet and / or the outlet of the condenser, or at the inlet and / or the outlet of the evaporator, or at the refrigerant pipe.

[0098] Through the setting of the silencer, the air conditioner can significantly reduce noise during operation and improve user comfort and satisfaction.

[0099] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A muffler for an air conditioner, characterized in that: include: The shell body surrounds a silencer cavity, and the shell body has a silencer cavity inlet and a silencer cavity outlet at two opposite ends along the length direction. The shell body inner wall is provided with a plurality of first protrusions, which protrude toward the silencer cavity and are arranged in a spiral shape along the length direction of the shell body.

2. The silencer for an air conditioner according to claim 1, characterized in that: The first protrusion extends along the circumference of the housing.

3. The silencer for an air conditioner according to claim 1, characterized in that: The inner wall of the shell is also provided with a plurality of second protrusions, which protrude toward the muffler cavity and are arranged at intervals along the length direction of the shell; There is an included angle between an extending direction of the first protrusion along the inner wall of the shell and an extending direction of the second protrusion along the inner wall of the shell.

4. The silencer for an air conditioner according to claim 3, characterized in that: The second protrusions extend along the circumference of the shell, and the plurality of first protrusions and the plurality of second protrusions are arranged alternately.

5. The silencer for an air conditioner according to claim 3, characterized in that: A plurality of second protrusions are arranged in a spiral shape along the length direction of the shell.

6. The silencer for an air conditioner according to claim 5, characterized in that: The inner wall of the shell is provided with a plurality of first recesses extending in a clockwise spiral direction from the inlet of the muffler cavity toward the outlet of the muffler cavity, a first protrusion is formed between every two adjacent first recesses, and the plurality of first recesses form a first internal thread; The inner wall of the shell is also provided with a plurality of second recesses extending in a counterclockwise spiral from the inlet of the muffler chamber toward the outlet of the muffler chamber, a second protrusion is formed between every two adjacent second recesses, and the plurality of second recesses form a second internal thread; Wherein, the first internal thread and the second internal thread intersect with each other correspondingly to form a mesh-like protrusion structure.

7. The silencer for an air conditioner according to claim 3, characterized in that: The ratio of the protrusion height of the first protrusion to the shell thickness is greater than or equal to 0.5 and less than or equal to 1; and / or, The ratio of the protrusion height of the second protrusion to the shell thickness is greater than or equal to 0.5 and less than or equal to 1.

8. The silencer for an air conditioner according to claim 3, characterized in that: The interval between adjacent first protrusions and second protrusions is greater than or equal to 3 mm and less than or equal to 5 mm.

9. The silencer for an air conditioner according to any one of claims 1 to 8, characterized in that: Also includes: An inlet duct connected to the shell at the inlet end of the muffler chamber; An outlet conduit is connected to the shell at the outlet end of the muffler chamber; The radial cross section of the shell is larger than the radial cross section of the inlet duct and the radial cross section of the outlet duct.

10. An air conditioner, characterized in that: The invention comprises a silencer for an air conditioner according to any one of claims 1 to 9.

Images