An exhaust muffling cover for a compressor, a pump body structure, and a compressor
By setting concave points on the contact surface of the fixed part of the compressor muffler cover to form a discontinuous surface and diffuse reflection structure, the noise deterioration problem caused by the existing muffler cover is solved, and the noise and vibration noise of the compressor are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PANASONIC WANBAO GUANGZHOU COMPRESSOR
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-23
AI Technical Summary
The existing compressor muffler cover has a simple structure, and sound waves are reflected and superimposed multiple times between the inner surface of the muffler cover and the contact surface of the bearing, resulting in noise degradation.
Several first concave points are set on the contact surface of the fixed part of the exhaust muffler cover to form a discontinuous surface to disrupt the directional path of the sound wave. The muffler cavity in the concave part is used for preliminary muffler treatment. At the same time, the cavity of the first concave point is used to form a diffuse reflection structure to disperse the sound energy and reduce the local weight to change the overall center of gravity and natural frequency.
It effectively reduces compressor noise and vibration by dispersing sound energy through a diffuse reflection structure and reducing vibration caused by friction, thereby changing the natural frequency to further reduce vibration noise.
Smart Images
Figure CN224396654U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, and in particular to an exhaust silencer cover, pump body structure and compressor for use in compressors. Background Technology
[0002] The compressor's pump body structure is primarily used to compress the refrigerant. Its core components include an upper bearing, a lower bearing, a crankshaft, a cylinder assembly, a piston, and a muffler cover. The crankshaft drives the piston to compress the refrigerant gas within the compression chamber of the cylinder assembly. The compressed high-pressure gas then enters the muffler chamber formed by the muffler cover and the upper bearing through the exhaust port of the upper bearing. Energy attenuation occurs through sound wave reflection, and the noise-reducing gas is finally discharged through the exhaust port of the muffler cover. However, existing muffler covers have a simple structure, resulting in multiple reflections and superpositions of sound waves on the inner surface of the muffler cover and between it and the bearing contact surface, which can worsen noise levels. Utility Model Content
[0003] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide an exhaust muffler cover, pump body structure and compressor for a compressor. By setting a number of first concave points on the contact surface of the fixing part of the exhaust muffler cover, the local weight of the exhaust muffler cover can be reduced, the overall center of gravity can be changed, and the natural frequency can be changed, thereby reducing the vibration of the compressor and further reducing vibration noise.
[0004] To achieve the above objectives, a first aspect of this utility model provides an exhaust muffler cover for a compressor, comprising a muffler cover body, the muffler cover body including a petal-shaped recess and a fixing part connected to the outer periphery of the opening of the recess; the interior of the recess is a muffler cavity, the recess is provided with an exhaust hole communicating with the muffler cavity, and a circular through hole suitable for being fitted onto the crankshaft of the compressor is provided at the center of the recess; the end face of the fixing part away from the recess is a contact surface, the contact surface is suitable for abutting against and fixing to the upper bearing of the compressor, and a plurality of first recesses are recessed on the contact surface, the inner cavities of the plurality of first recesses together forming a first diffuse reflection structure.
[0005] Therefore, the exhaust muffler cover for a compressor according to the present invention performs preliminary noise reduction through the muffler cavity formed inside the recessed portion, and through the several first concave points formed on the contact surface, the contact surface forms a discontinuous surface, thereby causing diffuse reflection of sound waves, disrupting the directional path of planar reflection, and dispersing sound energy to different directions, thereby reducing the noise of the compressor. At the same time, the first diffuse reflection structure formed by the inner cavity of the first concave point allows sound waves to vibrate inside, further reducing the noise of the compressor. In addition, the several first concave points can reduce the local weight of the exhaust muffler cover, change its overall center of gravity, thereby changing the natural frequency, reducing the vibration of the compressor, and further reducing vibration noise.
[0006] In one embodiment, the inner surface of the recessed portion is recessed to form a plurality of second concave points, and the cavities of the plurality of second concave points together form a second diffuse reflection structure.
[0007] In one embodiment, the connection between the contact surface and the inner surface of the recess is an arc transition surface, and a plurality of third recesses are formed on the arc transition surface.
[0008] In one embodiment, a plurality of the first concave points are evenly distributed on the contact surface, and the plurality of the first concave points are arranged in a matrix on the contact surface.
[0009] In one embodiment, the fixing part is provided with a plurality of mounting holes extending through it in the axial direction.
[0010] In one embodiment, the vent hole is formed by a radial outward recess from the edge of the circular through hole.
[0011] In one implementation, the shape of the first concave point is one or more combinations of a circle, a polygon, or an irregular shape.
[0012] A second aspect of this utility model provides a pump body structure, which includes an exhaust muffler cover for a compressor as described in any of the above embodiments, and further includes an upper bearing, a cylinder assembly, and a lower bearing connected sequentially along the axial direction. The exhaust muffler cover is disposed on the end face of the upper bearing away from the cylinder assembly, and the fixing part abuts against and is fixed to the end face of the upper bearing. According to the pump body structure of this utility model embodiment, by providing a plurality of first concave points on the contact surface of the fixing part of the exhaust muffler cover, the local weight of the exhaust muffler cover can be reduced, thereby changing its overall center of gravity, thus changing its natural frequency, reducing the vibration of the compressor, and further reducing vibration noise.
[0013] A third aspect of this utility model provides a compressor comprising the pump body structure described in any of the preceding embodiments. According to this utility model, by providing a plurality of first recesses on the contact surface of the fixing portion of the exhaust muffler cover, the local weight of the exhaust muffler cover can be reduced, causing a change in its overall center of gravity, thereby altering its natural frequency and reducing compressor vibration to further lower vibration noise.
[0014] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description
[0015] Figure 1 This is one of the structural schematic diagrams of an exhaust muffler cover for a compressor according to an embodiment of the present utility model;
[0016] Figure 2 This is a second schematic diagram of the structure of the exhaust muffler cover for the compressor according to an embodiment of the present utility model;
[0017] Figure 3 This is the third structural schematic diagram of the exhaust muffler cover for the compressor according to an embodiment of the present utility model;
[0018] Figure 4 This is a schematic diagram showing the connection between the exhaust muffler cover for the compressor and the upper bearing in an embodiment of this utility model.
[0019] Figure 5 This is one of the exploded views of the exhaust muffler cover and upper bearing for the compressor according to an embodiment of the present utility model;
[0020] Figure 6 This is the second exploded view of the exhaust muffler cover and upper bearing for the compressor according to an embodiment of the present utility model;
[0021] Figure 7 This is a schematic diagram of the pump body structure according to an embodiment of the present utility model.
[0022] Explanation of reference numerals in the attached figures:
[0023] 10. Exhaust muffler cover; 11. Fixing part; 12. Recessed part; 13. Contact surface; 14. First recessed point; 15. Second recessed point; 16. Third recessed point; 17. Circular through hole; 18. Exhaust port; 19. Mounting hole; 20. Upper bearing; 30. Cylinder assembly; 40. Lower bearing. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0026] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] In related technologies, the compressor's pump body structure is mainly used to compress the refrigerant. Its core components include an upper bearing, a lower bearing, a crankshaft, a cylinder assembly, a piston, and a muffler cover. The crankshaft drives the piston to compress the refrigerant gas within the compression chamber of the cylinder assembly. The compressed high-pressure gas enters the muffler chamber formed by the muffler cover and the upper bearing through the exhaust port of the upper bearing. Energy attenuation occurs through sound wave reflection, and the noise-reducing gas is finally discharged through the exhaust port of the muffler cover. However, existing muffler covers have a simple structure, and sound waves undergo multiple reflections and superpositions on the inner surface of the muffler cover and the contact surface with the bearing, resulting in a deterioration of noise levels.
[0028] In view of this, the present invention provides an exhaust muffler cover 10, a pump body structure, and a compressor for a compressor. According to the present invention, by providing a plurality of first recesses 14 on the contact surface 13 of the fixing part 11 of the exhaust muffler cover 10, the local weight of the exhaust muffler cover 10 can be reduced, thereby changing its overall center of gravity, thus changing its natural frequency, reducing the vibration of the compressor, and further reducing vibration noise.
[0029] Please see Figures 1 to 7 The first aspect of this utility model provides an exhaust muffler cover 10 for a compressor, including a muffler cover body, the muffler cover body including a petal-shaped recess 12 and a fixing part 11 connected to the outer periphery of the opening of the recess 12; the interior of the recess 12 is a muffler cavity, the recess 12 is provided with an exhaust hole 18 communicating with the muffler cavity, and the center of the recess 12 is provided with a circular through hole 17 suitable for being fitted onto the crankshaft of the compressor; the end face of the fixing part 11 away from the recess 12 is a contact surface 13, the contact surface 13 is suitable for abutting against the upper bearing 20 fixed on the compressor, and a plurality of first recesses 14 are recessed on the contact surface 13, the inner cavities of the plurality of first recesses 14 together forming a first diffuse reflection structure.
[0030] In this embodiment of the present invention, a plurality of first concave points 14 are evenly distributed on the contact surface 13, and the plurality of first concave points 14 are arranged in a matrix on the contact surface 13.
[0031] Therefore, according to the present invention, the exhaust muffler cover 10 for a compressor performs preliminary noise reduction through the muffler cavity formed inside the recessed portion 12. Furthermore, a plurality of first recesses 14 are formed on the contact surface 13, arranged in a matrix, causing the contact surface 13 to form a discontinuous surface, thereby causing diffuse reflection of sound waves, disrupting the directional path of planar reflection, and dispersing sound energy in different directions, thus reducing compressor noise. Simultaneously, the first diffuse reflection structure formed within the cavity of the first recesses 14 allows sound waves to vibrate within it, further reducing compressor noise. Moreover, the matrix distribution of the first recesses 14 reduces the actual contact area 13 between the fixing portion 11 and the upper bearing 20, reducing vibration caused by friction, and thus reducing compressor noise generated by vibration. In addition, the plurality of first recesses 14 can reduce the local weight of the exhaust muffler cover 10, changing its overall center of gravity, thereby changing its natural frequency and reducing compressor vibration to further reduce vibration noise.
[0032] Optionally, in some embodiments of the present invention, the inner surface of the recessed portion 12 is recessed to form a plurality of second recesses 15, and the inner cavities of the plurality of second recesses 15 together form a second diffuse reflection structure.
[0033] Optionally, in some embodiments of the present invention, the connection between the contact surface 13 and the inner surface of the recess 12 is an arc transition surface, and a plurality of third recesses 16 are formed on the arc transition surface.
[0034] Optionally, in some embodiments of the present invention, the shape of the first concave point 14 is one or more combinations of a circle, a polygon, or an irregular shape.
[0035] Optionally, in some embodiments of this utility model, the fixing part 11 is provided with a plurality of mounting holes 19 extending through in the axial direction.
[0036] Optionally, in some embodiments of the present invention, the vent 18 is formed radially outward from the edge of the circular through hole 17.
[0037] The following is combined with Figures 1 to 7 The following is a detailed description of a specific embodiment of the exhaust muffler cover 10 for a compressor according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of the present invention.
[0038] This embodiment provides an exhaust muffler cover 10 for a compressor, comprising a muffler cover body, the muffler cover body including a petal-shaped recess 12 and a fixing part 11 connected to the outer periphery of the opening of the recess 12; the interior of the recess 12 is a muffler cavity, and an exhaust hole 18 communicating with the muffler cavity is provided on the recess 12; a circular through hole 17 suitable for being fitted onto the crankshaft of the compressor is provided at the center of the recess 12; the end face of the fixing part 11 away from the recess 12 is a contact surface 13, the contact surface 13 is suitable for abutting against the upper bearing 20 fixed on the compressor, and a plurality of first concave points 14 are formed in the contact surface 13, the inner cavities of the plurality of first concave points 14 together forming a first diffuse reflection structure; and the plurality of first concave points 14 are evenly distributed on the contact surface 13, and the plurality of first concave points 14 are arranged in a matrix on the contact surface 13.
[0039] Furthermore, in this embodiment, the inner surface of the recessed portion 12 is recessed to form a plurality of second recesses 15, and the cavities of the plurality of second recesses 15 together form a second diffuse reflection structure. In addition, the connection between the contact surface 13 and the inner surface of the recessed portion 12 is an arc transition surface, and a plurality of third recesses 16 are recessed on the arc transition surface.
[0040] In this embodiment, a plurality of mounting holes 19 are provided through the fixing part 11 along the axial direction. The vent hole 18 is formed by radially recessing outward from the edge of the circular through hole 17. In addition, the first recess 14, the second recess 15, and the third recess 16 are circular in shape.
[0041] A second aspect of this utility model provides a pump body structure, which includes an exhaust muffler cover 10 for a compressor as described above, and further includes an upper bearing 20, a cylinder assembly 30, and a lower bearing 40 connected sequentially along the axial direction. The exhaust muffler cover 10 is disposed on the end face of the upper bearing 20 away from the cylinder assembly 30, and the fixing part 11 abuts and is fixed to the end face of the upper bearing 20. According to the pump body structure of this utility model embodiment, by providing a plurality of first recesses 14 on the contact surface 13 of the fixing part 11 of the exhaust muffler cover 10, the local weight of the exhaust muffler cover 10 can be reduced, thereby changing its overall center of gravity, thus changing its natural frequency, reducing the vibration of the compressor, and further reducing vibration noise.
[0042] A third aspect of this utility model provides a compressor that includes the pump body structure described above. According to this utility model, by providing a plurality of first recesses 14 on the contact surface 13 of the fixing portion 11 of the exhaust muffler cover 10, the local weight of the exhaust muffler cover 10 can be reduced, causing a change in its overall center of gravity, thereby altering its natural frequency and reducing compressor vibration to further reduce vibration noise.
[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model's exhaust muffler cover 10 for compressors, pump body structure, and compressor range. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. An exhaust muffler cover for a compressor, characterized in that: The device includes a silencing cover, which comprises a petal-shaped recess and a fixing part connected to the outer periphery of the opening of the recess; the interior of the recess is a silencing cavity, and the recess is provided with an exhaust hole communicating with the silencing cavity; a circular through hole suitable for being fitted onto the crankshaft of a compressor is provided at the center of the recess; the end face of the fixing part away from the recess is a contact surface, which is suitable for abutting against and fixing to the upper bearing of the compressor; a plurality of first concave points are formed in the contact surface, and the inner cavities of the plurality of first concave points together form a first diffuse reflection structure.
2. The exhaust muffler cover for a compressor according to claim 1, characterized in that: The inner surface of the recessed portion is recessed to form a plurality of second concave points, and the cavities of the plurality of second concave points together form a second diffuse reflection structure.
3. The exhaust muffler cover for a compressor according to claim 1, characterized in that: The connection between the contact surface and the inner surface of the recess is a circular arc transition surface, and a number of third recesses are formed on the circular arc transition surface.
4. The exhaust muffler cover for a compressor according to claim 1, characterized in that: A plurality of the first concave points are evenly distributed on the contact surface, and the plurality of the first concave points are arranged in a matrix on the contact surface.
5. The exhaust muffler cover for a compressor according to claim 1, characterized in that: The fixing part has several mounting holes extending through it along the axial direction.
6. The exhaust muffler cover for a compressor according to claim 1, characterized in that: The vent hole is formed by a radial outward recess from the edge of the circular through hole.
7. The exhaust muffler cover for a compressor according to claim 1, characterized in that: The shape of the first concave point is one or more combinations of a circle, a polygon, or an irregular shape.
8. A pump body structure, characterized in that: Including the exhaust muffler cover for a compressor as described in any one of claims 1 to 7, It also includes an upper bearing, a cylinder assembly, and a lower bearing connected sequentially along the axial direction. The exhaust muffler cover is disposed on the end face of the upper bearing away from the cylinder assembly, and the fixing part abuts and is fixed to the end face of the upper bearing.
9. A compressor, characterized in that: Includes the pump body structure as described in claim 8.