Exhaust silencing cover for compressor and compressor

Abstract

The utility model relates to the technical field of compressors, in particular to an exhaust silencing cover for a compressor and the compressor, and the exhaust silencing cover for the compressor structurally comprises a chassis part and a top fixed on a fixed disc of the compressor; the cover body part is formed in the middle of the base plate part, an exhaust hole is formed in the top of the cover body part, a plurality of silencing cavities are formed in the periphery of the cover body part, and the cover body part is arranged above an exhaust port of the compressor in a covering mode; an included angle is formed between the exhaust direction of the exhaust port and the arrangement direction of the exhaust hole relative to the exhaust port, and at least one silencing cavity is arranged in the range of the included angle. The exhaust noise reduction cover for the compressor and the compressor can solve the problems that an existing compressor noise reduction structure is poor in noise reduction effect on abnormal frequency doubling sound or abnormal peak point noise, and aerodynamic noise cannot be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an exhaust muffling cover for a compressor and the compressor. BACKGROUND

[0002] In recent years, with the continuous improvement of living standards, consumers' requirements for noise control of air conditioning systems are also increasingly stringent. As one of the main noise sources in air conditioning systems, the reduction of the noise level of the compressor has become a key problem for the air conditioning industry.

[0003] With the continuous upgrading of products of manufacturers of commercial central air conditioning systems, the noise control requirements for scroll compressors are increasingly strict, such as OA value requirements of overall noise, no abnormal frequency doubling sound in the frequency band of 0Hz to 20000Hz, and no abnormality in hearing. The traditional method for reducing the noise of scroll compressors, such as using soundproof cotton and damping blocks, has limited effect, which can only reduce the OA value of overall noise by about 1dBA to 3dBA, and the noise reduction effect on frequency doubling sound and abnormal sound is not obvious.

[0004] In the current scroll compressor industry, a muffling cover with an upper shell type overall muffling structure is usually used. However, this structure results in a large internal space of the muffling cover and a large exhaust gap volume, which causes an increased impact on the energy efficiency of the compressor. In addition, due to the lack of optimized design in structure, the noise reduction effect of the upper shell type overall muffling structure is usually unsatisfactory, especially for the noise reduction effect of abnormal frequency doubling sound or abnormal peak point noise, which cannot reduce the howling sound caused by airflow pulsation. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the purpose of the present application is to provide an exhaust muffling cover for a compressor and the compressor, so as to solve the problem that the noise reduction effect of the existing muffling structure of the compressor on abnormal frequency doubling sound or abnormal peak point noise is poor, and the aerodynamic noise cannot be reduced.

[0006] According to the first aspect of the present application, an exhaust muffling cover for a compressor is provided, wherein the exhaust muffling cover for the compressor comprises: a bottom disc part fixed on the top of the bottom disc of the compressor; and a cover body part formed in the middle part of the bottom disc part, the top part of the cover body part is provided with an exhaust hole, the outer periphery of the cover body part is formed with a plurality of muffling cavities, and the cover body part covers the exhaust port of the compressor; an included angle is formed between the exhaust direction of the exhaust port and the setting direction of the exhaust hole relative to the exhaust port, and at least one muffling cavity is arranged within the range of the included angle.

[0007] Preferably, the muffling cavities are recessed towards the inside of the cover body part, and the adjacent two muffling cavities are formed as a protruding part.

[0008] Preferably, the cross section of the sound attenuation cavity in the horizontal direction is formed as an arc shape, and the radius of the sound attenuation cavity is 16mm to 30mm.

[0009] Preferably, the number of the exhaust holes is multiple, and the multiple exhaust holes are respectively arranged at the top of the multiple protruding portions.

[0010] Preferably, the number of the exhaust holes is two, and the line between the two exhaust holes intersects with the axis of the exhaust port, and the included angle is 90°.

[0011] Preferably, an arc-shaped avoiding port is formed on the outer periphery of the bottom disc portion.

[0012] Preferably, the setting position of the avoiding port corresponds to the setting position of the sound attenuation cavity.

[0013] Preferably, multiple mounting holes are formed on the outer periphery of the bottom disc portion, and the setting positions of the multiple mounting holes respectively correspond to the setting positions of the multiple sound attenuation cavities.

[0014] Preferably, the wall thickness of the cover body portion is 1.5mm to 3mm.

[0015] According to the second aspect of the present application, a compressor is provided, wherein the compressor comprises the exhaust sound attenuation cover for compressor as described above.

[0016] The exhaust sound attenuation cover for compressor and the compressor of the present application effectively block the mechanical noise generated by the valve plate action and the frequency doubling sound generated by the valve plate by arranging the exhaust port cover inside the cover body portion. The sound attenuation cavity is arranged on the cover body portion to reduce the exhaust gap volume and the energy efficiency loss of the compressor. In addition, the airflow discharged from the exhaust port needs to flow through at least one sound attenuation cavity before reaching the exhaust hole for discharge, thereby effectively reducing the pulsation and flow rate of the airflow and further reducing the aerodynamic noise. In this way, the problem of poor noise reduction effect of the existing compressor sound attenuation structure on abnormal frequency doubling sound or abnormal peak point noise and the inability to reduce aerodynamic noise can be effectively solved.

[0017] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Figure 1 is a schematic view of an exhaust muffler for a compressor according to the present application.

[0020] Figure 2 is another schematic view of an exhaust muffler for a compressor according to the present application.

[0021] Figure 3 is a schematic view of an exhaust muffler for a compressor and a fixed plate according to the present application.

[0022] Figure 4 is a schematic view of a scroll compressor according to the present application.

[0023] Reference numerals: 1 - base pan portion; 10 - avoidance opening; 11 - mounting hole; 2 - cover portion; 20 - muffling cavity; 21 - protruding portion; 22 - exhaust hole; 3 - exhaust port; 32 - air flow flow path; 4 - fixed plate; 5 - exhaust check valve assembly; 100 - compressor. DETAILED DESCRIPTION

[0024] The following detailed description is provided to help the reader understand the method, device, and / or system described herein. However, various changes, modifications, and equivalents of the method, device, and / or system described herein will be apparent after an understanding of the present disclosure. For example, the order of the operations described herein is merely an example, and the operations are not limited to the order described herein, but can be altered in ways that will be apparent after an understanding of the present disclosure, except that operations that must occur in a specific order are not interchangeable. Also, descriptions of features known to those of ordinary skill in the art have been omitted so as to not obscure the description of the preferred embodiments with unnecessary detail.

[0025] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of the methods, devices, and / or systems to those skilled in the art after an understanding of the disclosure.

[0026] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element, or terms similar thereto, it is understood that an intervening element may be present or absent. For example, if a layer is described as being "on" a substrate, it is understood that an intervening layer may be present or absent. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," "directly adjacent to," "directly on top of," or terms similar thereto, it is understood that no intervening element is present.

[0027] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0028] Although terms such as "first" and "second" and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in one example described herein can also be referred to as a second component, assembly, region, layer or section in another example without departing from the teachings of the examples.

[0029] For ease of description, spatial terms such as "on," "upper," "below," and "lower" can be used with respect to the orientation of one element relative to another element as illustrated in the figures. Such spatial terms can be intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, a component described as relative to another component on the "upper" side of another component would then be oriented on the "lower" side of that component. Accordingly, the term "on" encompasses both an "on" and "under" orientation depending on the spatial orientation of the device. The device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations) and an appropriate modification to the spatial terms used herein will be made accordingly.

[0030] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has" are inclusive and permit the presence of one or more other features, numbers, operations, members, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, members, elements and / or combinations thereof.

[0031] Variations in the shapes illustrated in the drawings can occur as a result of manufacturing techniques and / or tolerances. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include variations in shapes that occur during manufacturing.

[0032] Features of the examples described herein can be combined with one another in any manner, as would be apparent to one of skill in the art after understanding the disclosure provided herein. Furthermore, although examples described herein have a variety of configurations, other configurations are possible as would be apparent to one of skill in the art after understanding the disclosure provided herein.

[0033] As Figures 1 to 4 illustrated, a compressor exhaust muffler according to a first aspect of the present application includes a base plate portion 1 and a cover portion 2.

[0034] In the following description, reference is made to the Figures 1 to 4 The specific structure of the above components of the compressor exhaust muffler and the connection relationship of the above components are described in detail.

[0035] As Figures 1 to 4 illustrated, in an embodiment, the cover portion 2 can be formed in the middle of the base plate portion 1, which can be fixed on the top of the fixed plate 4 of the compressor 100, so that the cover portion 2 can be covered above the exhaust port 3 of the compressor 100. An exhaust hole 22 can be formed in the top of the cover portion 2, and the compressed high-temperature and high-pressure gas flow is discharged from the exhaust port 3 into the cover portion 2, and then discharged from the exhaust hole 22 of the cover portion 2 to the upper shell of the compressor 100. A plurality of muffling cavities 20 can be formed in the outer periphery of the cover portion 2. An included angle is formed between the exhaust direction of the exhaust port 3 and the setting direction of the exhaust hole 22 relative to the exhaust port 3 (i.e., the direction of the line connecting the projection of the exhaust hole 22 on the upper surface of the fixed plate 4 and the exhaust port 3), and at least one muffling cavity 20 is arranged within the range of the included angle.

[0036] Preferably, as Figures 1 to 3 illustrated, in an embodiment, the outer shape of the base plate portion 1 can be approximately circular, and the cover portion 2 can be formed in the center of the base plate portion 1. The cover portion 2 can be integrally formed with the base plate portion 1. As Figure 1As shown, the cover portion 2 may include a sidewall extending vertically in a ring shape, and a top plate portion disposed on the top of the sidewall, which may be arranged horizontally. The exhaust port 22 may be formed in the top plate portion. Preferably, the wall thickness of the cover portion may be 1.5mm to 3mm, which can effectively block the mechanical noise generated by the valve plate's operation and the overtone sound generated by the valve plate.

[0037] Furthermore, preferably, such as Figures 1 to 3 As shown, in this embodiment, a portion of the sidewall can be recessed into the interior of the cover portion 2 to form a silencing cavity 20, and a protrusion 21 can be sandwiched between two adjacent silencing cavities 20. That is, the projection of the cover portion 2 on the horizontal plane can be formed in a petal shape, and multiple silencing cavities 20 are formed at intervals on the outer periphery of the cover portion 2. The airflow discharged from the exhaust port 3 will flow along the sidewall, and the airflow path 32 will reach the exhaust port 22 after passing through at least one of the silencing cavities 20.

[0038] Further optimized, such as Figures 1 to 3 As shown, in this embodiment, the cross-section of the silencing cavity 20 in the horizontal direction can be formed as an arc, and the radius of the arc (i.e., the radius of the silencing cavity 20) can be from 16mm to 30mm. This arrangement can effectively reduce the exhaust clearance volume of the exhaust silencing hood for the compressor, and when the airflow passes through the silencing cavity 20, the silencing cavity 20 can reduce the pulsation and velocity of the airflow, thereby reducing aerodynamic noise.

[0039] Preferred, such as Figures 1 to 3 As shown, in this embodiment, there can be multiple exhaust holes 22, which can be spaced apart to improve the exhaust efficiency of the exhaust muffler for the compressor. The multiple exhaust holes 22 can be respectively located on the top of the multiple protrusions 21, allowing the exhaust holes 22 to be positioned away from the exhaust port 3.

[0040] Furthermore, preferably, such as Figures 1 to 3 As shown, in this embodiment, the number of exhaust holes 22 can specifically be two. The line connecting the two exhaust holes 22 can intersect the axis of the exhaust port 3, that is, the two exhaust holes 22 can be symmetrically arranged with respect to the axis of the exhaust port 3. Furthermore, the exhaust direction of the exhaust port 3 can be perpendicular to the line connecting the two exhaust holes 22, such that the angle between the exhaust direction of the exhaust port 3 and the arrangement direction of either exhaust hole 22 relative to the exhaust port 3 is 90°. This arrangement maximizes the length of the airflow path 32, allowing the airflow to reach the exhaust holes 22 after passing through the silencer cavity 20 as much as possible.

[0041] In addition, preferred, such as Figures 1 to 3As shown in the embodiment, an arc-shaped avoiding opening 10 can be further formed on the outer periphery of the bottom plate 1, and the avoiding opening 10 is used for avoiding the suction pipe of the compressor 100. Further, the setting position of the avoiding opening 10 can correspond to the setting position of the sound absorbing cavity 20, and the diameter of the avoiding opening 10 can be slightly smaller than the diameter of the sound absorbing cavity 20, so as to avoid the interference between the exhaust sound absorbing cover of the compressor and the suction pipe.

[0042] Preferably, as Figures 1 to 3 As shown in the embodiment, a plurality of mounting holes 11 can be further formed on the outer periphery of the bottom plate 1, and the mounting holes 11 are used for the bolts to pass through, so as to fix the bottom plate 1 to the fixed plate 4. The setting positions of the plurality of mounting holes 11 can respectively correspond to the setting positions of the plurality of sound absorbing cavities 20, so that sufficient mounting space can be reserved on the bottom plate 1 for setting the bolts and the nuts.

[0043] In use, the exhaust sound absorbing cover of the compressor effectively blocks the mechanical noise generated by the valve plate action and the multiple frequency sound generated by the valve plate by covering the exhaust check valve assembly 5 inside the cover body 2. And by setting the sound absorbing cavities 20 on the outer periphery of the cover body 2, the exhaust gap volume is reduced, and the energy efficiency loss of the compressor 100 is reduced. In addition, after the exhaust port 3 exhausts the airflow into the cover body 2, the airflow needs to flow through a plurality of sound absorbing cavities 20 before reaching the exhaust hole 22 for exhaust, thereby effectively reducing the pulsation and flow rate of the airflow, and further reducing the aerodynamic noise.

[0044] In addition, as Figure 4 As shown in the embodiment, the compressor 100 according to the second aspect of the utility model comprises the exhaust sound absorbing cover of the compressor. Preferably, the compressor 100 can be a scroll compressor. The exhaust sound absorbing cover of the compressor can be fixed on the top of the fixed plate 4 by bolts, and the exhaust check valve assembly 5 is covered inside the exhaust sound absorbing cover. The airflow exhausted by the exhaust port 3 first enters the exhaust sound absorbing cover of the compressor, and then flows through a plurality of sound absorbing cavities 20 before being finally exhausted to the upper shell of the compressor 100 through the exhaust hole 22.

[0045] In use, the compressor 100 has a relatively significant effect of reducing the multiple frequency sound and the overall OA value. The multiple frequency sound generated by the exhaust valve mechanical noise at 1000HZ to 2000Hz can be reduced by 10dBA to 20dBA, and the OA value of the whole machine can be reduced by 3dBA to 6dBA. In addition, the compressor 100 has the advantages of compact structure, light weight, small exhaust pressure loss, etc., so as to balance the two indexes of noise and energy efficiency.

[0046] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any skilled person in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within 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. An exhaust muffling cover for a compressor, provided to a compressor, characterized by, The exhaust muffler for the compressor comprises: a bottom plate part fixed on the top of the bottom plate of the compressor; and a cover part formed in the middle of the bottom plate part, the top of the cover part being provided with an exhaust hole, and the outer periphery of the cover part being provided with a plurality of sound-absorbing cavities, the cover part covering the exhaust port of the compressor; an included angle is formed between the exhaust direction of the exhaust port and the setting direction of the exhaust hole relative to the exhaust port, and at least one sound-absorbing cavity is arranged within the range of the included angle.

2. The discharge muffling cover for a compressor according to claim 1, characterized by The sound-absorbing cavities are recessed towards the inside of the cover part, and two adjacent sound-absorbing cavities form a protruding part.

3. The discharge silencer for a compressor according to claim 2, characterized by The cross section of the sound-absorbing cavities in the horizontal direction is arc-shaped, and the radius of the sound-absorbing cavities is 16-30 mm.

4. The discharge silencer for a compressor according to claim 2, characterized by The number of the exhaust holes is multiple, and multiple exhaust holes are arranged on the top of multiple protruding parts, respectively.

5. The compressor discharge sound muffling cover according to claim 4, wherein The number of the exhaust holes is two, the connecting line between the two exhaust holes intersects with the axis of the exhaust port, and the included angle is 90°.

6. The compressor discharge sound muffling cover according to claim 1, wherein An arc-shaped avoiding port is formed in the outer periphery of the bottom plate part.

7. The compressor discharge sound muffling cover according to claim 6, characterized in that, The setting position of the avoiding port corresponds to the setting position of the sound-absorbing cavities.

8. The compressor discharge sound muffling cover according to claim 6, wherein A plurality of mounting holes are formed in the outer periphery of the bottom plate part, and the setting positions of the plurality of mounting holes correspond to the setting positions of the plurality of sound-absorbing cavities, respectively.

9. The discharge sound muffling cover for a compressor according to any one of claims 1 to 8, characterized by, The wall thickness of the cover part is 1.5-3 mm.

10. A compressor characterized by, The compressor comprises the exhaust muffler for the compressor according to any one of claims 1-9.

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