Silencing device and compressor
By designing a silencing device with a rotating housing and silencing channel in the compressor, the airflow path is extended and the kinetic energy of the airflow is absorbed, which solves the problem of insufficient noise in the mid-to-high frequency range in the existing technology, and achieves effective reduction of compressor noise and performance improvement.
Patent Information
- Application Number
- CN202520003342.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The existing compressor's silencing device is insufficient in reducing mid-to-high frequency noise, resulting in relatively high noise levels when the compressor is operating.
Design a noise reduction device, including a rotating shell and a noise reduction channel. Compressed gas enters the rotating shell through the air inlet and flows along the noise reduction channel. The rotating shell extends the airflow path and buffers and absorbs the airflow energy to reduce the noise when the airflow collides with the inner wall.
It effectively reduces the mid-to-high frequency noise of the compressor and improves the overall performance of the compressor.
Smart Images
Figure CN223868127U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration equipment, and in particular to a silencer and compressor. Background Technology
[0002] Because compressors generate significant noise during operation, existing technologies commonly employ silencers to reduce this noise. A compressor comprises upper and lower bearings, a cylinder, a motor rotor, and a housing. The silencer, together with the upper bearing, forms a silencer chamber. This chamber has a silencer port connecting to the cylinder and an exhaust port for discharging high-pressure gas from the silencer. The high-pressure gas compressed by the cylinder enters the silencer chamber through the silencer port, then enters the compressor housing through the exhaust port, and finally exits the compressor through the exhaust port on the housing.
[0003] Existing noise reduction devices are insufficient in reducing noise, especially in the mid-to-high frequency range, resulting in relatively high noise levels when the compressor is operating.
[0004] For those skilled in the art, designing a noise reduction device that can effectively reduce mid-to-high frequency noise is a pressing technical problem that needs to be solved. Utility Model Content
[0005] To address the technical problems existing in the prior art, the purpose of this utility model is to provide a silencing device and a compressor. This silencing device can absorb the kinetic energy of the airflow by extending the airflow path and buffering, thereby effectively reducing the noise generated when the inner wall collides and improving the performance of the compressor.
[0006] To achieve the above objectives, this utility model provides a silencing device, which includes a rotating housing with a silencing channel formed inside. An air inlet and an exhaust outlet are respectively provided at both ends of the rotating housing. Compressed gas enters the rotating housing through the air inlet, passes through the silencing channel, and is discharged from the exhaust outlet.
[0007] Optionally, the air inlet is located at the bottom of the rotating housing, and the exhaust outlet is located at the other end of the rotating housing away from the air inlet.
[0008] Optionally, the rotating housing may rotate at an angle greater than 180° in its circumferential direction.
[0009] Optionally, the rotating housing has a rotation angle greater than 270° in its circumferential direction.
[0010] Optionally, the rotating housing is configured to gradually surround itself circumferentially from one end of the air inlet.
[0011] Optionally, the rotating housing rotates at least one revolution.
[0012] Optionally, the inner diameter of the rotating housing gradually decreases along the direction from the air inlet to the exhaust outlet.
[0013] Optionally, the inner diameter of the rotating housing at the exhaust port is greater than half the inner diameter of the rotating housing at the air inlet.
[0014] To achieve the above objectives, this utility model also provides a compressor, including a cylinder and any of the above-mentioned silencers, wherein the rotating housing is used to be mounted on the cylinder, and the silencer channel is connected to the cylinder.
[0015] Optionally, the compressor further includes an upper bearing and a motor rotor. The upper bearing is disposed on the upper end face of the cylinder. The rotating housing is fixed on the upper bearing and forms the silencing channel with the upper bearing. The shaft of the motor rotor passes through the upper bearing, and the rotating housing gradually surrounds the upper bearing from its edge along its own circumference towards the shaft.
[0016] This invention provides a silencing device and a compressor. The silencing device includes a rotating housing. Compressed gas enters the rotating housing and flows along a silencing channel. The silencing channel guides the airflow and absorbs its kinetic energy by extending the airflow path and buffering it, thereby effectively reducing the kinetic energy of the airflow and thus reducing the noise generated when the airflow collides with the inner wall of the rotating housing. Simultaneously, the airflow process within the silencing channel conforms to the principles of fluid mechanics and resistance silencing, thus effectively reducing compressor noise.
[0017] In addition, the rotating housing of the silencer can be configured to gradually wrap around itself from one end of the air inlet inward, so that the rotating housing is configured as a snail shell-like structure. This can extend the length of the silencer channel, effectively reduce the kinetic energy of the gas, and reduce noise. Attached Figure Description
[0018] Figure 1 This is a partial three-dimensional structural diagram of the compressor in a preferred embodiment of the present invention, viewed from a first observation angle.
[0019] Figure 2 This is a partial three-dimensional structural diagram of the compressor in a preferred embodiment of the present invention, viewed from a second observation angle.
[0020] Figure 3 This is a partial top view of the compressor in a preferred embodiment of the present invention;
[0021] Figure 4 This is a side cross-sectional view of the compressor in a preferred embodiment of the present invention from a first viewing angle.
[0022] Figure 5This is a side cross-sectional view of the compressor in a preferred embodiment of the present invention from a second viewing angle.
[0023] Figure 6 This is a side cross-sectional view of the compressor from a third viewing angle in a preferred embodiment of the present invention.
[0024] Figure 7 This is a schematic diagram of the upper bearing in a preferred embodiment of the present invention from a first viewing angle;
[0025] Figure 8 This is a schematic diagram of the upper bearing in a preferred embodiment of the present invention from a second viewing angle;
[0026] Figure 9 This is a top view of the upper bearing in a preferred embodiment of the present invention;
[0027] Figure 10 This is a graph showing the reduction volume of the silencing device for different frequency bands in a preferred embodiment of the present invention. The horizontal axis represents the noise frequency, and the vertical axis represents the reduction volume of the silencing device for different frequency noises.
[0028] The reference numerals in the attached figures are explained as follows:
[0029] Silencing device 1; rotating housing 11; silencing channel 12; air inlet 13; exhaust port 14; upper bearing 2; outlet channel 21; rotating shaft 3. Detailed Implementation
[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.
[0031] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0033] In this description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this description, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0034] The following description, in conjunction with the accompanying drawings and preferred embodiments, describes the silencing device and compressor proposed in this utility model. In the following description, a rotary compressor is used as an example to illustrate that the silencing device of this utility model can effectively reduce compressor noise and improve compressor performance. However, those skilled in the art should understand that this silencing device can also be applied to other types of compressors.
[0035] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of the different embodiments or examples, without contradiction.
[0036] like Figures 1-6 As shown, this utility model provides a silencing device. The silencing device 1 includes a rotating housing 11, which is arc-shaped. A silencing channel 12 is formed inside the rotating housing 11. An air inlet 13 and an exhaust port 14 are respectively provided at both ends of the rotating housing 11. Compressed gas enters the rotating housing 11 through the air inlet 13, passes through the silencing channel 12, and is discharged from the exhaust port 14. The exhaust port 14 of the silencing device 1 is used to discharge the high-pressure gas in the silencing device 1.
[0037] The silencing device 1 provided in this application includes a rotating housing 11. Compressed gas enters the rotating housing 11 and flows along a silencing channel 12. The silencing channel 12 guides the airflow and absorbs the kinetic energy of the airflow by extending the airflow path and buffering it, thereby effectively reducing the kinetic energy of the airflow and thus reducing the noise generated when the airflow collides with the inner wall of the rotating housing 11. At the same time, the flow process of the airflow in the silencing channel 12 conforms to the principles of fluid mechanics and resistance silencing, thus effectively reducing the noise of the compressor.
[0038] Reference Figure 10 As shown, the silencing device 1 can eliminate the noise of the compressor, and has the greatest noise reduction effect on the mid-to-high frequency range (e.g., 1000Hz-1600Hz). It can be seen that the silencing device 1 can significantly eliminate the noise of the compressor in the mid-to-high frequency range.
[0039] like Figures 1-6 As shown, this utility model also provides a compressor, which includes a cylinder (not shown) and a silencer 1 as described in any one of the claims. A rotating housing 11 is used to be mounted on the cylinder, and a silencer channel 12 is connected to the cylinder.
[0040] Reference Figures 7-9 As shown, and in combination Figures 1-6 The compressor also includes an upper bearing 2 and a motor rotor. The upper bearing 2 is located on the upper end face of the cylinder. The rotating housing 11 is installed in conjunction with the upper bearing 2. The rotating housing 11 is fixed on the upper bearing 2 and together with the upper bearing 2 forms a noise reduction channel 12. The shaft 3 of the motor rotor passes through the upper bearing 2.
[0041] More specifically, the compressor includes a cylinder (not shown), a silencer 1, an upper bearing 2, a motor rotor, and a housing (not shown). The silencer 1, upper bearing 2, and motor rotor are all housed within the housing. The motor rotor is positioned above the silencer 1, and its shaft 3 passes through the silencer 1 and upper bearing 2 before entering the cylinder. Specifically, the upper bearing 2 has a through hole 22 along its axial direction, and the shaft 3 passes through the through hole 22, extends out of the silencer 1, and connects to the motor rotor. When the compressor is placed vertically, the direction away from the upper bearing 2 can be defined as the upper part of the silencer 1.
[0042] Continue to refer to Figures 7-9 The upper bearing 2 is provided with an outlet channel 21, which is connected to the air inlet 13 of the muffler 1. The outlet channel is used to export the high-pressure gas compressed by the cylinder into the rotating housing 11, and then discharge it from the exhaust port 14 after passing through the muffler channel 12. In addition, the upper part of the compressor housing is provided with an outlet section for discharging high-pressure gas, and the compressed gas inside the housing can be exported to the outside of the compressor from the outlet section.
[0043] When the compressor is working, the high-pressure gas compressed by the cylinder is discharged through the discharge channel 21 into the silencer channel 12 of the silencer device 1. After the high-pressure gas swirls in the silencer channel 12 to achieve noise reduction, it is discharged into the outer casing of the silencer device 1 through the exhaust port 14. Afterward, the high-pressure gas flows to the upper part of the compressor and is finally discharged through the gas outlet at the top of the casing.
[0044] Preferably, the air inlet 13 is located at the bottom of the rotating housing 11 and communicates with the outlet channel 21. This is advantageous because it allows compressed gas to enter the muffler 1 through the upper bearing 2, and then the compressed gas can smoothly enter the muffler channel 12 under the guidance of the rotating housing 11.
[0045] Return to reference Figure 2 and Figure 3 The exhaust port 14 can be located at the other end of the rotating housing 11 away from the air inlet 13, that is, the exhaust port 14 can be opened at the end of the rotating housing 11 away from the air inlet 13.
[0046] As a preferred embodiment, the other end of the rotating housing 11 forms an exhaust port 14 along its circumferential outer wall to facilitate the smooth discharge of gas.
[0047] Optionally, the rotating housing 11 has a rotation angle greater than 180° in its circumferential direction. That is, when the compressed gas flows from the inlet 13 along the silencer channel 12 to the exhaust port 14, the rotation angle of the compressed gas in the rotating housing 11 is greater than 180°. This allows the compressed gas to reduce its kinetic energy sufficiently in the silencer channel 12, thereby reducing noise.
[0048] In a preferred embodiment, the rotating housing 11 rotates at an angle greater than 270° in its circumferential direction, which helps to further reduce noise.
[0049] In another preferred embodiment, the rotating housing 11 is configured to gradually encircle inward from one end of the air inlet 13 along its own circumference, that is, the rotating housing 11 gradually encircles from the edge along its own circumference towards the geometric center, so that the rotating housing 11 is configured as a snail shell-like structure. This configuration can, on the one hand, extend the length of the silencing channel 11, effectively reduce the gas kinetic energy, and reduce noise; on the other hand, it can minimize the impact of compressed gas on the compressor housing after flowing out of the exhaust port 14, thereby preventing noise and airflow loss.
[0050] Reference Figures 1-3 As shown, the rotating housing 11 gradually wraps around itself from the edge of the upper bearing 2 towards the rotating shaft 3. At this time, the air inlet 13 of the rotating housing 11 is opened at the edge of the rotating housing 11, and the exhaust port 14 of the rotating housing 11 is opened at the position of the rotating housing 11 near the rotating shaft 3, which reduces the noise generated by the compressed gas impacting the compressor housing.
[0051] In a preferred embodiment, the rotating housing 11 rotates at least one revolution, meaning the rotating housing 11 is configured to rotate at least one revolution inward from the air inlet 13. Preferably, the rotating housing 11 rotates at least two revolutions, and each revolution of the rotating housing 11 inward is in contact with the adjacent outer ring. In this case, the shape of the rotating housing 11 resembles a snail shell, further increasing the length of the silencing channel 12.
[0052] It should be understood that the number of rotations of the rotating housing 11 is not limited in this application. In one embodiment, the rotating housing 11 rotates 1 or 2 times. In other embodiments, the rotating housing 11 may rotate 3, 4 or more times.
[0053] In a preferred embodiment, the inner diameter of the rotating housing 11 gradually decreases along the direction from the air inlet 13 to the exhaust port 14. In other words, the overall structure of the rotating housing 11 gradually decreases in inner diameter starting from the air inlet 13, and the exhaust port 14 of the rotating housing 11 is located at the smallest end of the inner diameter of the rotating housing 11. Since the temperature of the compressed gas decreases as the diameter of the rotating housing 11 decreases, the temperature of the compressed gas at the exhaust port 14 can be reduced, thereby cooling and improving the efficiency of the compressor.
[0054] In a preferred embodiment, the inner diameter of the rotating housing 11 at the exhaust port 14 is greater than half the inner diameter of the rotating housing 11 at the air inlet 13. This arrangement prevents the inner diameter of the exhaust port 14 from being too small, which would reduce the energy efficiency ratio of the compressor.
[0055] In another preferred embodiment, the inner diameter of the rotating housing 11 is equal at all locations.
[0056] As another preferred embodiment, the inner diameter of the rotating housing 11 can also gradually increase along the direction from the air inlet 13 to the exhaust outlet 14. In other words, the overall structure of the rotating housing 11 gradually increases in inner diameter starting from the air inlet 13, and the exhaust outlet 14 of the rotating housing 11 is opened at the end of the largest inner diameter of the rotating housing 11.
[0057] Preferably, the inner diameter of the air inlet 13 of the rotating housing 11 is approximately equal to the inner diameter of the exhaust port 14, which ensures the flow rate of compressed gas and ensures that the compressor has a high energy efficiency ratio.
[0058] Of course, in other cases, the inner diameter of the air inlet 13 of the rotating housing 11 may be greater than or less than the inner diameter of the exhaust port 14.
[0059] In summary, this utility model provides a silencing device and a compressor. Compressed gas enters the silencing device 1 and flows along the silencing channel 12. The silencing channel 12 guides the airflow, absorbing its kinetic energy by extending its travel distance and buffering it, thereby effectively reducing the kinetic energy of the airflow and consequently reducing the noise generated when the airflow collides with the inner wall of the rotating outer casing 11. Simultaneously, the airflow process within the silencing channel 12 conforms to the principles of fluid mechanics and resistance silencing, effectively reducing compressor noise and improving compressor performance.
[0060] In addition, the rotating housing 11 of the silencing device 1 can be configured to gradually wrap around itself from one end of the air inlet 13 inward in a circumferential direction, so that the rotating housing 11 is configured as a snail shell-like structure, which can extend the length of the silencing channel 12, fully reduce the gas kinetic energy, and reduce noise.
[0061] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model.
Claims
1. A noise reduction device, characterized in that, The silencing device includes a rotating housing with a silencing channel inside. An air inlet and an exhaust outlet are respectively provided at both ends of the rotating housing. Compressed gas enters the rotating housing through the air inlet, passes through the silencing channel, and is discharged from the exhaust outlet.
2. The silencing device as described in claim 1, characterized in that, The air inlet is located at the bottom of the rotating housing, and the exhaust outlet is located at the other end of the rotating housing away from the air inlet.
3. The silencing device as described in claim 1, characterized in that, The rotating shell rotates at an angle greater than 180° in its circumferential direction.
4. The silencing device as described in claim 3, characterized in that, The rotating shell has a rotation angle greater than 270° in its circumferential direction.
5. The silencing device as described in claim 1, characterized in that, The rotating housing is configured to gradually encircle inward from one end of the air inlet along its own circumference.
6. The silencing device as described in claim 5, characterized in that, The rotating shell rotates at least one revolution.
7. The silencing device as described in any one of claims 1-6, characterized in that, Along the direction from the air inlet to the exhaust outlet, the inner diameter of the rotating housing gradually decreases.
8. The silencing device as described in claim 7, characterized in that, The inner diameter of the rotating housing at the exhaust port is greater than half the inner diameter of the rotating housing at the air inlet.
9. A compressor, characterized in that, Includes a cylinder and a muffler as described in any one of claims 1-8, wherein the rotating housing is used to be mounted on the cylinder, and the muffler channel communicates with the cylinder.
10. The compressor as claimed in claim 9, characterized in that, It also includes an upper bearing and a motor rotor. The upper bearing is disposed on the upper end face of the cylinder. The rotating housing is fixed on the upper bearing and forms the noise reduction channel with the upper bearing. The shaft of the motor rotor passes through the upper bearing, and the rotating housing gradually surrounds the upper bearing from its edge along its own circumference towards the shaft.