Exhaust noise reducing structure of scroll compressor

Abstract

The invention provides an exhaust noise reduction structure of a scroll compressor, which belongs to the technical field of scroll compressor manufacturing and comprises a noise reduction structure, a fixed valve plate structure, a high-low pressure partition plate and a scroll compression structure. A silencing assembly base is installed on a fixed vortex boss, a plurality of funnel-shaped sound insulation components are arranged above the silencing assembly base, an outer sleeve is connected to a high-low pressure isolation assembly through a bolt, and the outer sleeve, the high-low pressure isolation assembly and the outer sleeve are coaxial and provided with a step-shaped positioning structure. The valve plate fixing assembly controls gas flow, the high-low pressure isolation assembly prevents leakage, and the vortex compression working assembly achieves gas compression. The number of the sound insulation parts can be adjusted, high-sound-absorption composite materials are adopted, and the outer sleeve is made of high-strength aluminum alloy. The structure absorbs sound wave energy by changing the airflow direction and increasing the number of contact times, has the advantages of efficient noise reduction, accurate structure optimization, high universality and the like, can be widely applied to the field of scroll compressors, and improves the acoustic performance and stability of the scroll compressors.

Description

Technical Field

[0001] The invention relates to the technical field of scroll compressor manufacturing, and in particular to a scroll compressor exhaust noise reducing structure. Background Art

[0002] Ordinary scroll compressors mainly include fixed scroll, movable scroll, crankshaft, motor, housing and other structures. The fixed scroll and movable scroll have relatively eccentric scroll teeth with a difference of 180°. The fixed scroll is installed on the base and keeps the position fixed. One side of the movable scroll meshes with the fixed scroll, forming a series of crescent-shaped spaces inside, and the center of the other side of the movable scroll contacts the crankshaft. The crankshaft rotates under the action of the motor, driving the movable scroll to perform a non-rotating orbital motion around the center of the fixed scroll. During this movement, the crescent-shaped space gradually moves toward the center and continues to shrink, and finally the gas in the crescent-shaped space is discharged from the exhaust hole of the fixed scroll. The compression process is completed.

[0003] After the compressed gas enters the high-pressure chamber through the fixed vortex exhaust hole, airflow noise is inevitably generated due to airflow pulsation. At the same time, the valve plate is pushed open and closed by the airflow, which causes the valve plate to vibrate and generate noise. These noises are inherent in the structure of the compressor, so how to reduce the generation and spread of exhaust noise becomes an inevitable problem.

[0004] The existing scroll compressor noise reduction structure is to install a silencer outside the exhaust valve plate, and reduce noise by absorbing sound wave energy through the internal blank plate of the silencer. However, since the silencer is a cavity inside, the compressor exhaust gas can only flow in a predetermined direction, so the number of times it contacts the inner wall of the silencer is limited, and the sound wave energy absorbed by the silencer is also relatively limited. Summary of the invention

[0005] According to the above technical problem that the existing scroll compressor has large exhaust noise, a scroll compressor exhaust noise reduction structure is provided. The present invention increases the length of the gas flow path by continuously changing the airflow movement direction, so that the number of times the airflow noise and valve plate noise contact with the inside of the silencer structure increases, thereby fully absorbing the sound wave energy to achieve the purpose of noise reduction.

[0006] The technical means adopted by the present invention are as follows:

[0007] A scroll compressor exhaust noise reduction structure, comprising: a muffler structure, a fixed valve plate structure, a high-low pressure partition plate, and a scroll compression structure:

[0008] The sound-absorbing structure comprises a base, a sound-isolating plate, an external sleeve and fixing bolts;

[0009] The base is fixedly mounted on the fixed scroll boss, and a plurality of sound insulation boards of the same specifications are placed above the base;

[0010] A sleeve is placed outside the base and the sound insulation board;

[0011] The sleeve is fixed to the high and low pressure partitions by bolts;

[0012] The midpoints of the sleeve, the sound insulation board and the base are coaxial.

[0013] Furthermore, the base is a cylindrical structure that penetrates from top to bottom, and the outer diameter of the base matches the outer diameter of the fixed scroll boss.

[0014] Furthermore, the sound insulation board is funnel-shaped, gradually concave downward from the outer circle to the inner circle to the center hole, with uniform thickness and both sides being rough surfaces, the sound insulation components are consistent in shape and size, and an exhaust hole that passes through from top to bottom is provided at the center; the external sleeve is a flat-top hat type, with an inner diameter larger than the outer diameter of the sound insulation component and the base, a top cover at the upper end and an exhaust hole at the center of the top cover, and a brim-shaped base at the outer edge of the lower end, and the sleeve base is provided with vertical through bolt holes that are consistent with the distribution of the high and low pressure partition bolt holes.

[0015] Furthermore, the inner top surface of the sleeve, the upper and lower end surfaces of the outer ring of the sound insulation board, the upper and lower end surfaces of the outer ring of the base and the upper end surface of the fixed scroll boss are all provided with stepped limiting structures to ensure the precise installation and positioning of each component.

[0016] Furthermore, the diameter of the central exhaust hole of the sound insulation board is not less than the minimum diameter of the fixed vortex exhaust hole; the diameter of the exhaust hole at the upper end of the sleeve is not less than the diameter of the central exhaust hole of the sound insulation board.

[0017] Furthermore, the fixed valve plate structure includes a valve plate, a limit plate and fixing bolts; the valve plate and the limit plate are fixed above the fixed vortex boss by bolts to control the gas flow.

[0018] Furthermore, the high and low pressure partition structure is arranged above the fixed scroll, the inner side of the center hole of the high and low pressure partition is connected to the outer circle of the fixed scroll boss, and there are multiple bolt holes on the outer side of the center hole of the high and low pressure partition; a sealing ring is installed at the connection between the high and low pressure partition and the fixed scroll.

[0019] Furthermore, the scroll compression structure includes a movable scroll and a fixed scroll, which are meshed with each other; a cylindrical boss is provided at the center position of the upper end of the fixed scroll, and the fixed scroll exhaust hole passes through the fixed scroll back plate and the boss.

[0020] Due to the adoption of the above technical solution, compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention provides a scroll compressor exhaust noise reduction structure, which continuously changes the airflow movement direction by arranging a unique silencer structure on the outer ring of the valve plate structure and utilizing the funnel-shaped design of the sound insulation plate and the stepped limiting structure between the components, thereby greatly increasing the gas flow path length, making the airflow noise and the valve plate noise contact with the inside of the silencer structure for multiple times, fully absorbing the sound wave energy, effectively reducing the exhaust noise, and improving the acoustic environment quality when the compressor is running.

[0022] 2. The present invention provides a scroll compressor exhaust noise reduction structure, in which the structural designs of the components are ingenious and cooperate with each other, such as the specific shape and size relationship of the sleeve, sound insulation board and base in the silencer structure, as well as the coaxial setting and stepped limit structure therebetween, which are not only easy to install, but also can ensure the precise positioning of each component, thereby ensuring the stability and reliability of the entire noise reduction structure during the operation of the compressor, and reducing the risk of performance degradation or failure due to structural looseness or displacement.

[0023] 3. The present invention provides a scroll compressor exhaust noise reduction structure. The number of sound insulation boards in the silencer structure can be adjusted within a certain range according to actual needs. The sound insulation boards are made of composite materials with high sound absorption performance, and the outer sleeve is made of high-strength aluminum alloy. It can be applicable to scroll compressors of different working conditions and models. While meeting the noise reduction requirements, it can be flexibly configured according to the working conditions and performance requirements of the specific compressor, and has broad application prospects and practical value.

[0024] Based on the above reasons, the present invention can be promoted in the field of scroll compressor manufacturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 Schematic diagram I of the installation structure for reducing exhaust noise of a scroll compressor according to the present invention;

[0027] Figure 2 This is a schematic diagram II of the installation structure for reducing exhaust noise of a scroll compressor according to the present invention;

[0028] Figure 3 It is a schematic diagram of a silencer structure in a structure for reducing exhaust noise of a scroll compressor according to the present invention;

[0029] Figure 4It is a schematic diagram of a structural base for reducing exhaust noise of a scroll compressor according to the present invention;

[0030] Figure 5 It is a schematic diagram of a sound insulation board for reducing exhaust noise of a scroll compressor according to the present invention;

[0031] Figure 6 It is a schematic diagram of a structural sleeve for reducing exhaust noise of a scroll compressor according to the present invention;

[0032] Figure 7 It is a schematic diagram of the fixed scroll boss structure of the scroll compressor exhaust noise reduction structure described in the present invention.

[0033] In the figure: 100, base; 101, step on the upper end surface of the base; 102, step on the lower end surface of the base; 200, sound insulation board; 201, step on the upper end surface of the sound insulation board; 202, step on the lower end surface of the sound insulation board; 203, exhaust hole in the center of the sound insulation board; 300, sleeve; 301, step on the top surface inside the sleeve; 302, top cover; 303, exhaust hole; 304, sleeve base; 305, bolt hole of sleeve base; 400, bolt; 500, valve plate; 600, limit plate; 700, bolt; 800, high and low pressure partition; 900, fixed vortex; 901, fixed vortex boss; 902, fixed vortex exhaust hole; 903, fixed vortex bolt hole; 1000, movable vortex; 1100, sealing ring. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] Example 1

[0042] like Figure 1 As shown, the present invention provides a structure for reducing exhaust noise of a scroll compressor, comprising: a silencer structure, a fixed valve plate structure, a high-low pressure partition plate 800, and a scroll compression structure; the silencer structure comprises a base 100, a sound insulation plate 200, an external sleeve 300 and a fixing bolt 400, the base 100 is mounted on a fixed scroll boss 901, a plurality of sound insulation plates 200 of the same specifications are placed above the base 100, a sleeve 300 is placed outside the base 100 and the sound insulation plate 200, the sleeve 300 is fixed to the high-low pressure partition plate 800 by bolts 400, and the midpoints of the sleeve 300, the sound insulation plate 200 and the base 100 are coaxial.

[0043] like Figures 3 to 7As shown, the base 100 is a cylindrical structure that is connected from top to bottom, and the outer diameter of the base 100 is equivalent to the outer diameter of the boss of the fixed scroll 900; the sound insulation board 200 is funnel-shaped, high on all sides and low in the center, gradually concave downward from the outer circle to the inner circle, and stops at the center hole position; the sound insulation board 200 has a uniform thickness, and the upper and lower surfaces of the sound insulation board 200 are both rough surfaces; all the sound insulation boards 200 have the same shape and size, and an exhaust hole is provided at the center position of the sound insulation board 200; the exhaust holes of all the sound insulation boards 200 are connected from top to bottom; the sleeve 100 is a flat-top hat-shaped structure, and the inner diameter of the sleeve 300 is slightly larger than the outer diameters of the sound insulation board 200 and the base 100. A top cover 302 is provided at the upper end of the sleeve 300, and an exhaust hole 303 is provided at the center of the top cover; a brim-shaped base 304 is provided at the outer edge of the lower end of the sleeve 300, and sleeve base bolt holes 305 that pass through from top to bottom are provided on the sleeve base 304, and the distribution of the sleeve base bolt holes 305 is consistent with the distribution of the high and low pressure partition bolt holes.

[0044] The inner top surface of the sleeve 300, the upper and lower end surfaces of the outer ring of the sound insulation board 200, the upper and lower end surfaces of the outer ring of the base 100, and the upper end surface of the fixed vortex boss 901 are all provided with stepped limiting structures. The inner top surface step 301 of the sleeve can completely overlap with the upper end surface step 201 of the uppermost sound insulation board. When every two adjacent sound insulation boards 200 are connected, the lower end surface step 202 of the upper sound insulation board can completely overlap with the upper end surface step 201 of the lower sound insulation board, and the lower end surface step 202 of the lowermost sound insulation board can completely overlap with the upper end surface step 101 of the base. The lower end surface step 102 of the base 100 can completely overlap with the upper end surface step 901 of the fixed vortex boss.

[0045] The diameter of the central exhaust hole 203 of the sound insulation board is the minimum diameter of the fixed vortex exhaust hole 902. The diameter of the exhaust hole 303 at the upper end of the sleeve is not less than the diameter of the central exhaust hole 203 of the sound insulation board.

[0046] The fixed valve plate structure includes a valve plate 500 , a limiting plate 600 and fixing bolts 700 ; the valve plate 500 and the limiting plate 600 are fixed above the fixed scroll boss 901 by bolts 700 .

[0047] The high-low pressure partition plate 800 structure is arranged above the fixed scroll 900. The inner side of the center hole 802 of the high-low pressure partition plate is connected to the outer circle of the fixed scroll boss 901. A plurality of bolt holes 801 are processed on the outer side of the center hole 802 of the high-low pressure partition plate. A sealing ring 1100 is installed at the connection between the high-low pressure partition plate 800 and the fixed scroll 900.

[0048] The scroll compression structure C includes a movable scroll 1000 and a fixed scroll 900, which are meshed with each other. A cylindrical boss 901 is provided at the center of the upper end of the fixed scroll 900, and a fixed scroll exhaust hole 902 passes through the back plate of the fixed scroll 900 and the boss.

[0049] Example 2

[0050] like Figure 2 As shown, a scroll compressor exhaust noise reduction structure is characterized by comprising: a silencer structure, a fixed valve plate structure, a high and low pressure partition 800, and a scroll compression structure. The silencer structure comprises a base 100, a sound insulation board 200, an external sleeve 300, and a fixing bolt 400. The base 100 is mounted on a fixed scroll boss 901. A plurality of sound insulation boards 200 of the same specifications are placed above the base 100. A sleeve 300 is placed outside the base 100 and the sound insulation board 200. The sleeve 300 is fixed to the fixed scroll 900 by bolts 400. The midpoints of the sleeve 300, the sound insulation board 200, and the base 100 are coaxial.

[0051] like Figures 3 to 7 As shown, the base 100 is a cylindrical structure that passes through from top to bottom. The outer diameter of the base 100 is equivalent to the outer diameter of the boss of the fixed scroll 900. The sound insulation board 200 is funnel-shaped, high on all sides and low in the center. It gradually sinks downward from the outer circle to the inner circle and stops at the center hole. The thickness of the sound insulation board 200 is uniform, and the upper and lower surfaces of the sound insulation board 200 are both rough surfaces. All the sound insulation boards 200 have the same shape and size, and an exhaust hole is set at the center of the sound insulation board 200. The exhaust holes of all the sound insulation boards 200 are connected from top to bottom. The sleeve 100 is a flat-top hat-shaped structure. The inner diameter of the sleeve 300 is slightly larger than the outer diameter of the sound insulation board 200 and the base 100. A top cover 302 is set at the upper end of the sleeve 300, and an exhaust hole 303 is set at the center of the top cover. A brim-shaped base 304 is set at the outer edge of the lower end of the sleeve 300, and sleeve base bolt holes 305 are set on the sleeve base 304, which are connected from top to bottom. The distribution of the sleeve base bolt holes 305 is consistent with the distribution of the fixed vortex bolt holes 904.

[0052] The inner top surface of the sleeve 300, the upper and lower end surfaces of the outer ring of the sound insulation board 200, the upper and lower end surfaces of the outer ring of the base 100, and the upper end surface of the fixed vortex boss 901 are all provided with a stepped limiting structure. The inner top surface step 301 of the sleeve 300 and the upper end surface step 201Ⅰ of the uppermost sound insulation board 200Ⅰ can completely overlap; when every two adjacent sound insulation boards 200 are connected, the lower end surface step 202 of the upper sound insulation board can completely overlap with the upper end surface step 201 of the lower sound insulation board; the lower end surface step 202 of the lowermost sound insulation board can completely overlap with the upper end surface step 101 of the base, and the lower end surface step 102 of the base 100 can completely overlap with the upper end surface step of the fixed vortex boss 901.

[0053] The diameter of the central exhaust hole 203 of the sound insulation board is the minimum diameter of the fixed vortex exhaust hole 902. The diameter of the exhaust hole 303 at the upper end of the sleeve is not less than the diameter of the central exhaust hole 203 of the sound insulation board.

[0054] The fixed valve plate structure includes a valve plate 500 , a limiting plate 600 and fixing bolts 700 ; the valve plate 500 and the limiting plate 600 are fixed above the fixed scroll boss 901 by bolts 700 .

[0055] The vortex compression structure includes a movable vortex 1000 and a fixed vortex 900, which are meshed with each other. A cylindrical boss 901 is arranged at the center position of the upper end of the fixed vortex 900. The fixed vortex exhaust hole 902 passes through the back plate and the boss of the fixed vortex 900. A plurality of fixed vortex bolt holes 903 are processed above the fixed vortex boss 901. The bolt holes of the distribution sleeve 300 of the fixed vortex bolt holes 903 are the same.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scroll compressor exhaust noise reduction structure, characterized in that: include: Silencer structure, fixed valve plate structure, high and low pressure partitions, vortex compression structure: The sound-absorbing structure comprises a base, a sound-isolating plate, an external sleeve and fixing bolts; The base is fixedly mounted on the fixed scroll boss, and a plurality of sound insulation boards of the same specifications are placed above the base; A sleeve is placed outside the base and the sound insulation board; The sleeve is fixed to the high and low pressure partitions by bolts; The midpoints of the sleeve, the sound insulation board and the base are coaxial.

2. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The base is a cylindrical structure that penetrates from top to bottom, and the outer diameter of the base matches the outer diameter of the fixed scroll boss.

3. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The sound insulation board is funnel-shaped, gradually concave downward from the outer circle to the inner circle to the center hole, with uniform thickness and both sides being rough surfaces. The sound insulation components are consistent in shape and size, and an exhaust hole that runs through the center is provided. The external sleeve is a flat-top hat type, with an inner diameter larger than the outer diameter of the sound insulation component and the base, a top cover at the upper end and an exhaust hole at the center of the top cover, and a brim-shaped base at the outer edge of the lower end. The sleeve base is provided with vertical through bolt holes that are consistent with the distribution of the high and low pressure partition bolt holes.

4. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The inner top surface of the sleeve, the upper and lower end surfaces of the outer ring of the sound insulation board, the upper and lower end surfaces of the outer ring of the base and the upper end surface of the fixed scroll boss are all provided with stepped limiting structures to ensure the precise installation and positioning of each component.

5. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The diameter of the central exhaust hole of the sound insulation board is not less than the minimum diameter of the fixed vortex exhaust hole; the diameter of the exhaust hole at the upper end of the sleeve is not less than the diameter of the central exhaust hole of the sound insulation board.

6. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The fixed valve plate structure includes a valve plate, a limit plate and fixing bolts; the valve plate and the limit plate are fixed above the fixed scroll boss by bolts to control the gas flow.

7. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The high-low pressure partition structure is arranged above the fixed scroll, the inner side of the center hole of the high-low pressure partition is connected to the outer circle of the fixed scroll boss, and a plurality of bolt holes are arranged on the outer side of the center hole of the high-low pressure partition; a sealing ring is installed at the connection between the high-low pressure partition and the fixed scroll.

8. The structure for reducing exhaust noise of a scroll compressor according to claim 1, characterized in that: The vortex compression structure comprises a movable vortex and a fixed vortex, which are meshed with each other; a cylindrical boss is arranged at the center position of the upper end of the fixed vortex, and the fixed vortex exhaust hole passes through the fixed vortex back plate and the boss.

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