Sound insulation and noise reduction device for high-pressure cavity of compressor

Abstract

The sound insulation and noise reduction device comprises an outer pipe body and an inner pipe body, the outer pipe body is arranged on the outer side of the inner pipe body in a sleeving mode, and the height of the top of the outer pipe body is larger than that of the top of the inner pipe body; an upper annular interlayer is arranged between the upper part of the circumferential surface of the inner pipe body and the inner wall of the outer pipe body, and a lower annular interlayer is arranged between the bottom of the inner pipe body and the bottom of the outer pipe body; a space enclosed by the outer pipe body, the inner pipe body, the upper annular interlayer and the lower annular interlayer forms an annular lower cavity; a plurality of vent holes are formed in the upper annular interlayer, penetrate through the upper annular interlayer and are communicated with the lower cavity; the outer pipe body is provided with a pipe body air inlet hole corresponding to the high-pressure cavity air inlet hole, and the pipe body air inlet hole penetrates through the side wall of the outer pipe body and is communicated with the lower cavity; the outer diameter of the outer pipe body corresponds to the inner diameter of the high-pressure cavity, the inner diameter of the inner pipe body corresponds to the outer diameter of the screw connecting column, and therefore interference fit between the sound insulation and noise reduction device and the high-pressure cavity is achieved.

Description

Technical Field

[0001] This utility model relates to the field of compressors, and more specifically, to a sound insulation and noise reduction device for the high-pressure chamber of a compressor. Background Technology

[0002] Noise is a crucial indicator of compressor quality, and noise caused by exhaust pulsation is paramount in addressing compressor noise issues. Typically, the compressor cylinder head is designed with a high-pressure chamber, which connects the valve assembly's exhaust end to the internal exhaust coil 11. The high-pressure chamber contains a screw-connecting post 13. The high-pressure chamber cover 12 seals the high-pressure chamber via the screw-connecting post 13, fastening screws 14, and an annular sealing gasket 15. The fastening screws 14 and screw-connecting post 13 are threaded together, with the screw-connecting post 13 having an internal thread corresponding to the fastening screws 14. The sealing gasket 15 seals the gap between the high-pressure chamber cover 12 and the high-pressure chamber. The high-pressure chamber cover also has an internal exhaust coil connecting the internal space of the high-pressure chamber to the external refrigeration system. The valve assembly's exhaust end is connected to the high-pressure chamber through the high-pressure chamber inlet 10. High-temperature, high-pressure gas from the valve assembly's exhaust end expands and compresses after entering the high-pressure chamber 9 through the high-pressure chamber inlet 10, and is then discharged from the internal exhaust coil 11 to the refrigeration system outside the compressor. However, the high-temperature and high-pressure gas traveling in the high-pressure chamber 9 is often accompanied by large exhaust pulsations, which results in significant noise.

[0003] In the existing design, the high-pressure chamber 9 is a part of the cylinder seat, near the cylinder end of the cylinder seat (e.g., Figure 1 As shown, the cylinder seat is mainly made of gray iron, which has good heat transfer performance. When the high-temperature and high-pressure airflow enters the high-pressure chamber through the high-pressure chamber inlet 10, the heat transfer inside the high-pressure chamber will cause the cylinder head temperature of the cylinder seat to rise, which will affect the intake temperature of the cylinder head, resulting in overheating of the intake and reducing the cooling capacity of the compressor.

[0004] Given that the high-pressure chamber has a regular cylindrical shape, its ability to mitigate exhaust pulsation is not maximized. Currently, there are no relevant improvement solutions to address this issue.

[0005] Through research and development, the applicant discovered that further optimization of the internal shape and structure could further reduce noise caused by exhaust pulsation. This would allow for the use of changes in the volume of the high-pressure chamber to mitigate noise issues caused by high-temperature, high-pressure airflow pulsation. Furthermore, there is currently no technical solution to reduce exhaust pulsation and thus achieve sound insulation and noise reduction by altering the internal volume of the aforementioned high-pressure chamber. Utility Model Content

[0006] To address the aforementioned problems, this utility model proposes a sound insulation and noise reduction device for the high-pressure chamber of a compressor, thereby overcoming the shortcomings of the prior art:

[0007] A sound insulation and noise reduction device for the high-pressure chamber of a compressor includes an outer tube and an inner tube, wherein the outer tube is sleeved on the outside of the inner tube, and the height of the top of the outer tube is greater than the height of the top of the inner tube.

[0008] An upper annular partition is provided between the upper part of the circumferential surface of the inner tube and the inner wall of the outer tube, and a lower annular partition is provided between the bottom of the inner tube and the bottom of the outer tube.

[0009] The space enclosed by the outer tube, inner tube, upper annular partition, and lower annular partition forms an annular lower chamber;

[0010] The upper annular partition has several ventilation holes, which penetrate the upper annular partition and are connected to the lower chamber.

[0011] The outer tube body is provided with a tube body air inlet corresponding to the high pressure chamber air inlet. The tube body air inlet penetrates the side wall of the outer tube body and is connected to the lower chamber.

[0012] The outer diameter of the outer tube corresponds to the inner diameter of the high-pressure chamber, and the inner diameter of the inner tube corresponds to the outer diameter of the screw connecting post, thereby achieving an interference fit between the sound insulation and noise reduction device and the high-pressure chamber.

[0013] Preferably, all vents are distributed around the inner tube.

[0014] Preferably, the vent is an arc-shaped hole.

[0015] Preferably, all vents are symmetrically distributed with the central axis of the inner tube as the axis of symmetry.

[0016] Preferably, the area of ​​the vent hole is less than the area of ​​the air inlet 7 of the pipe body.

[0017] Preferably, the vent hole in the pipe is a round hole.

[0018] Preferably, the outer tube, inner tube, upper annular partition, and lower annular partition are fixedly connected or integrally injection molded.

[0019] Preferably, the sound insulation and noise reduction device is made of PEEK material, which is corrosion-resistant, high-temperature resistant, and has good thermal insulation properties. During implementation, the sound insulation and noise reduction device, due to its interference fit with the high-pressure chamber, becomes more stable and will not loosen after thermal expansion. The device divides the entire high-pressure chamber into several smaller cavities through an outer tube, an inner tube, an upper annular partition, and a lower annular partition. It utilizes the Helmholtz resonance principle to distribute the cavity volume, achieving the sound-absorbing characteristics of a Helmholtz resonator and further improving the noise problem caused by exhaust pulsation.

[0020] Preferably, the top of the inner tube is higher than the top of the upper annular partition.

[0021] Preferably, the connection points between the outer tube and the upper and lower annular partitions are respectively provided with arcs.

[0022] Preferably, the connection between the inner tube and the lower annular partition is also provided with an arc.

[0023] Preferably, both the outer tube and the inner tube are cylindrical.

[0024] The beneficial effects of this product are: It has a simple structure and is easy to manufacture. This product does not require altering the existing internal shape and structure of the high-pressure chamber. It connects the inner tube (with matching screws) to the outer tube (with matching screw diameter), and sets upper and lower annular partitions between the inner and outer tubes. By incorporating air inlets in the tubes that match the high-pressure chamber's vent holes and those in the upper annular partition, the entire high-pressure chamber is divided into a connected lower and upper chamber. The upper and lower chambers further reduce noise caused by exhaust pulsation, utilizing the volume change of the high-pressure chamber to mitigate noise issues caused by high-temperature, high-pressure airflow pulsation. Furthermore, there is currently no technical solution that reduces exhaust pulsation and achieves sound insulation and noise reduction by altering the internal volume of the high-pressure chamber.

[0025] By employing corrosion-resistant, high-temperature-resistant, and heat-insulating materials, this product, through a combination of structure and materials, mitigates the heat transfer of high-temperature, high-pressure gas from the high-pressure chamber to the compressor cylinder head, thereby reducing the intake temperature of the cylinder head, minimizing intake overheating, and reducing exhaust pulsation. This product fully utilizes the Helmholtz resonator principle to further reduce exhaust pulsation and effectively improve the overall noise level of the compressor. Attached Figure Description

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Figure 1 Schematic diagram of sound insulation and noise reduction device Figure 1 .

[0028] Figure 2 Schematic diagram of sound insulation and noise reduction device Figure 2 .

[0029] Figure 3 Schematic diagram of sound insulation and noise reduction device Figure 3 .

[0030] Figure 4 A top view of the sound insulation and noise reduction device.

[0031] Figure 5 A cross-sectional view of a sound insulation and noise reduction device.

[0032] Figure 6 A cross-sectional view of the sound insulation and noise reduction device installed in the high-pressure chamber.

[0033] Figure 7 A schematic diagram of an existing compressor cylinder housing --- the high-pressure chamber is the part of the compressor cylinder housing.

[0034] Figure 8 A schematic diagram of the compressor cylinder seat after the sound insulation and noise reduction device is installed in the high-pressure chamber -- omitting the high-pressure chamber, fastening screws, and sealing gaskets.

[0035] Figure 9 The sound insulation and noise reduction device was installed into the high-pressure chamber - along with the high-pressure chamber, fastening screws, and sealing gaskets.

[0036] In the diagram: 1. Outer tube; 2. Inner tube; 3. Upper annular partition; 4. Lower annular partition; 5. Lower chamber; 6. Vent hole; 7. Air inlet hole of the tube; 8. Upper chamber; 9. High-pressure chamber; 10. Valve group exhaust end; 11. Inner exhaust coil; 12. High-pressure chamber cover; 13. Screw connecting post; 14. Fastening screw; 15. Sealing gasket. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0038] like Figure 1-9 As shown, in order to facilitate understanding of the above technical solution of this utility model, the above technical solution of this utility model will be described in detail below through specific usage methods.

[0039] A sound insulation and noise reduction device for the high-pressure chamber of a compressor includes an outer tube 1 and an inner tube 2. The outer tube 1 is sleeved on the outside of the inner tube 2, and the height of the top of the outer tube 1 is greater than the height of the top of the inner tube 2.

[0040] An upper annular partition 3 is provided between the upper part of the circumferential surface of the inner tube 2 and the inner wall of the outer tube 1, and a lower annular partition 4 is provided between the bottom of the inner tube 2 and the bottom of the outer tube 1.

[0041] The space enclosed by the outer tube 1, the inner tube 2, the upper annular partition 3, and the lower annular partition 4 forms an annular lower chamber 5;

[0042] The upper annular partition 3 is provided with several ventilation holes 6, which penetrate the upper annular partition 3 and are connected to the lower chamber 5;

[0043] The outer tube 1 is provided with a tube inlet 7 corresponding to the high-pressure chamber inlet 10. The tube inlet 7 penetrates the side wall of the outer tube 1 and is connected to the lower chamber 5.

[0044] The outer diameter of the outer tube 1 corresponds to the inner diameter of the high-pressure chamber 9, and the inner diameter of the inner tube 2 corresponds to the outer diameter of the screw connecting column 13, thereby achieving an interference fit between the sound insulation and noise reduction device and the high-pressure chamber 9.

[0045] In one feasible embodiment, all the vents 6 are distributed around the inner tube 2.

[0046] In one feasible embodiment, the vent 6 is an arc-shaped hole.

[0047] In one feasible embodiment, all vents 6 are symmetrically distributed with the central axis of the inner tube 2 as the axis of symmetry.

[0048] In one feasible embodiment, the area of ​​the vent 6 is less than the area of ​​the air inlet 7 in the pipe.

[0049] In one feasible embodiment, the vent hole 7 in the pipe body is a circular hole.

[0050] In one feasible embodiment, the outer tube 1, the inner tube 2, the upper annular partition 3, and the lower annular partition 4 are fixedly connected or integrally injection molded.

[0051] In one feasible embodiment, the sound insulation and noise reduction device is made of PEEK material, which is corrosion-resistant, high-temperature resistant, and has good thermal insulation properties. During implementation, because the sound insulation and noise reduction device is interference-fitted with the high-pressure chamber 9, it becomes more stable and will not loosen after thermal expansion. The sound insulation and noise reduction device divides the entire internal volume of the high-pressure chamber 9 into several small cavities through the outer tube 1, inner tube 2, upper annular partition 3, and lower annular partition 4. It utilizes the Helmholtz resonance principle to distribute the cavity volume, achieving the sound attenuation characteristics of a Helmholtz resonator and further improving the noise problem caused by exhaust pulsation.

[0052] In one feasible embodiment, the top of the inner tube 2 is higher than the top of the upper annular partition 3.

[0053] In one feasible embodiment, the connection positions between the outer tube 1 and the upper annular partition 3 and the lower annular partition 4 are respectively provided with arcs.

[0054] In one feasible embodiment, the connection position between the inner tube 2 and the lower annular partition 4 is also provided with an arc.

[0055] In one feasible embodiment, both the outer tube 1 and the inner tube 2 are cylindrical.

[0056] Working Principle: The outer tube 1, inner tube 2, upper annular partition 3, lower annular partition 4, lower chamber 5, vent 6, and tube inlet 7 are an improved structure of this product. The high-pressure chamber 9, high-pressure chamber inlet 10, internal exhaust coil 11, high-pressure chamber cover 12, screw connecting post 13, fastening screw 14, and annular sealing gasket 15 are all existing structures upon which this product is based. Based on adapting to the existing structure of the high-pressure chamber 9, the sound insulation and noise reduction device is placed entirely within the high-pressure chamber 9 through dimensional matching, so that the outer tube 1 faces close to the inner wall of the high-pressure chamber 9 circumferentially, and the inner tube 2 is sleeved on the screw connecting post 13, thereby achieving an interference fit between the sound insulation and noise reduction device and the high-pressure chamber 9. The space enclosed between the outer tube 1, inner tube 2, upper annular partition 3, screw connecting post 13, and high-pressure chamber cover 12 forms the upper chamber 8. The space enclosed by the outer tube 1, inner tube 2, upper annular partition 3, and lower annular partition 4 forms the lower chamber 5. The upper chamber 8 and the lower chamber 5 are connected by a vent 6.

[0057] High-temperature, high-pressure airflow enters the high-pressure chamber 9 from the cylinder head, then passes through the high-pressure chamber inlet 10 and the sound insulation and noise reduction device's inlet 7, entering the lower chamber 5. The airflow, continuously entering and expanding in the lower chamber 5, is compressed and then enters the upper chamber 8 through the vent 6. The expanded and compressed airflow entering the upper chamber 8 then passes through the internal exhaust coil 11 on the high-pressure chamber cover 12, ultimately exiting the compressor and entering the refrigeration system. The volumes of the upper and lower chambers of the sound insulation and noise reduction device follow the mechanism of a Helmholtz resonator, and the inlet in the lower chamber must match the inlet 10 of the high-pressure chamber.

[0058] In summary, through the aforementioned unique technical solution, this product boasts a simple structure and is easy to manufacture. This product does not require altering the existing internal shape and structure of the high-pressure chamber. It connects the inner tube with matching screws to the outer tube with the matching inner diameter of the high-pressure chamber. Upper and lower annular partitions are installed between the inner and outer tubes. Air inlets in the tubes, matching the high-pressure chamber's vent holes and those in the upper annular partition, effectively divide the entire high-pressure chamber into interconnected lower and upper chambers. These upper and lower chambers further reduce noise caused by exhaust pulsation, utilizing the volume change of the high-pressure chamber to mitigate noise issues caused by high-temperature, high-pressure airflow pulsation. Furthermore, there is currently no technical solution that reduces exhaust pulsation and achieves sound insulation and noise reduction by altering the internal volume of the high-pressure chamber.

[0059] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A sound insulation and noise reduction device for the high-pressure chamber of a compressor, characterized in that, It includes an outer tube (1) and an inner tube (2), wherein the outer tube (1) is sleeved on the outside of the inner tube (2), and the height of the top of the outer tube (1) is greater than the height of the top of the inner tube (2); An upper annular partition (3) is provided between the upper part of the circumferential surface of the inner tube (2) and the inner wall of the outer tube (1), and a lower annular partition (4) is provided between the bottom of the inner tube (2) and the bottom of the outer tube (1). The space enclosed by the outer tube (1), inner tube (2), upper annular partition (3), and lower annular partition (4) forms an annular lower chamber (5); The upper annular partition (3) is provided with a plurality of ventilation holes (6), the ventilation holes (6) penetrate the upper annular partition (3) and are connected to the lower chamber (5); The outer tube (1) is provided with a tube inlet (7) corresponding to the high-pressure chamber inlet (10). The tube inlet (7) penetrates the side wall of the outer tube (1) and is connected to the lower chamber (5). The outer diameter of the outer tube (1) corresponds to the inner diameter of the high-pressure chamber (9), and the inner diameter of the inner tube (2) corresponds to the outer diameter of the screw connecting column (13), thereby achieving an interference fit between the sound insulation and noise reduction device and the high-pressure chamber (9).

2. The sound insulation and noise reduction device as described in claim 1, characterized in that, All the vents (6) are distributed around the inner tube (2).

3. The sound insulation and noise reduction device as described in claim 2, characterized in that, The vent (6) is an arc-shaped hole.

4. The sound insulation and noise reduction device as described in claim 2, characterized in that, All the vents (6) are symmetrically distributed about the central axis of the inner tube (2).

5. The sound insulation and noise reduction device as described in claim 1, characterized in that, The area of ​​the vent (6) is less than the area of ​​the air inlet (7) of the pipe.

6. The sound insulation and noise reduction device as described in claim 1, characterized in that, The vent hole 7 in the pipe is a round hole.

7. The sound insulation and noise reduction device as described in claim 1, characterized in that, The outer tube (1), inner tube (2), upper annular partition (3), and lower annular partition (4) are fixedly connected or integrally injection molded.

8. The sound insulation and noise reduction device as described in claim 1, characterized in that, The sound insulation and noise reduction device is made of PEEK material, which is corrosion-resistant, high-temperature resistant, and has good heat insulation properties.

9. The sound insulation and noise reduction device as described in claim 1, characterized in that, The top of the inner tube (2) is higher than the top of the upper annular partition (3).

10. The sound insulation and noise reduction device as described in claim 1, characterized in that, The connection positions between the outer tube (1) and the upper annular partition (3) and the lower annular partition (4) are respectively provided with arcs; The connection between the inner tube (2) and the lower annular partition (4) is also provided with an arc; Both the outer tube (1) and the inner tube (2) are cylindrical.

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