A low noise air compressor

Abstract

The utility model relates to air compressor technical field discloses a low noise air compressor, including compressor body, the top of compressor body is provided with compression pump chamber, and the top of compression pump chamber is connected with air inlet pipe and air outlet pipe, make the air form spiral guide flow before entering compression pump chamber through setting up spiral air deflector and the structure of closed column, relieve the screeching noise caused by the sudden inrush airflow, through setting up the combination structure of expansion chamber, gather together chamber and perforated pipe in the air outlet end in proper order, form the exhaust path of " expansion - contraction - expansion", effectively slow down the sound wave impact in the high pressure air sudden release process, simultaneously, the flexible bellows and perforated plate cooperation sound absorbing material are embedded in the exhaust passage, realize multistage noise reduction, the rubber sheet is clamped for buffering connection vibration in the air filter chamber and air inlet pipe junction, sets up the rubber connecting seat in the bottom, further absorbs the structural vibration in the compressor operation.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, specifically a low-noise air compressor. Background Technology

[0002] An air compressor is a device that converts mechanical energy into gas pressure energy. It primarily uses an electric motor or internal combustion engine to drive the compressor's working components (such as pistons, screws, or blades) to compress gas, thereby outputting compressed air at a certain pressure. This type of equipment is widely used in industrial manufacturing, engineering construction, and transportation as a core air source for driving pneumatic tools, spraying devices, gas delivery systems, and control systems.

[0003] During the operation of an air compressor, significant noise is often generated due to factors such as high-speed airflow disturbance during intake and exhaust, compressor pump vibration, and exhaust sound waves, affecting the operating environment and the work experience of operators. Traditional air compressors typically only include an air filter to purify the intake air, lacking effective control measures for intake noise, exhaust noise, and structural sound transmission caused by equipment vibration, resulting in a high overall noise level.

[0004] Therefore, it is necessary to design a low-noise air compressor to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a low-noise air compressor to solve the technical problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-noise air compressor, comprising a compressor body, a compression pump chamber disposed at the top of the compressor body, and an inlet pipe and an outlet pipe connected to the top of the compression pump chamber, wherein a second connecting ring is fixedly connected to the top of the inlet pipe, a rubber sheet is placed on the top of the second connecting ring, the second connecting ring and the rubber sheet are threadedly connected to a first connecting ring by multiple bolts, and an air filter chamber is fixedly connected to the top of the first connecting ring, a filter plate is fixedly connected to the bottom of the air filter chamber, and a first perforated plate is embedded inside the inlet pipe. A spiral air guide vane is fixedly connected to the inner surface of the orifice plate, and a closed column is fixedly inserted into the inner surface of the spiral air guide vane. An expansion cavity is fixedly sleeved at the bottom end of the air outlet pipe, and a perforated pipe is fixedly connected to the bottom end of the air outlet pipe. A gathering cavity is fixedly connected to the bottom of the expansion cavity, and a connecting pipe is connected to the bottom of the gathering cavity. A flexible corrugated connecting pipe is fixedly connected to the bottom end of the connecting pipe, and a connecting pipe is fixedly connected to the bottom of the connecting pipe. An air supply pipe is fixedly connected to the bottom end of the air supply pipe, which is connected to the inside of the compressor body. A second perforated plate is attached to the inner wall of both the connecting pipe and the air supply pipe.

[0007] Preferably, the spiral air guide is fixed to the inside of the top end of the air intake pipe, and the spiral air guide is located below the second connecting ring, and the outer surface of the sealing column is in contact with the inner wall of the spiral air guide.

[0008] Preferably, a second connecting ring is fixedly connected to the top of the air intake pipe, a rubber sheet is placed on the top of the second connecting ring, the second connecting ring and the rubber sheet are connected to the first connecting ring by multiple bolts, and the bottom of the air filter chamber is fixedly connected to the top of the first connecting ring, a filter plate is fixedly connected to the bottom of the air filter chamber, the second connecting ring is made of rubber, and the second connecting ring is annular in shape, with the inner diameter of the second connecting ring being equal to the diameter of the air intake pipe.

[0009] Preferably, both the expansion cavity and the convergence cavity are funnel-shaped, and the bottom diameter of the expansion cavity is larger than the top diameter, and the top diameter of the convergence cavity is larger than the bottom diameter.

[0010] Preferably, the outer surface of the perforated tube is provided with multiple air inlets, and the perforated tube is located inside the expansion cavity.

[0011] Preferably, the bottom of the compressor body is fixedly connected to two symmetrical bases, and the bottom of each of the two bases is fixedly connected to a rubber connecting seat, and the outer surfaces of the bases and the rubber connecting seats are provided with two symmetrical mounting holes.

[0012] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0013] This invention utilizes a structure with spiral guide vanes and a sealed column inside the intake pipe to create a spiral flow of air before it enters the compressor chamber, mitigating the whistling noise caused by sudden airflow. At the outlet, a combination of an expansion chamber, a convergence chamber, and a perforated pipe is sequentially arranged to form an "expansion-contraction-expansion" exhaust path, effectively reducing the sonic impact during the sudden release of high-pressure air. Simultaneously, a flexible corrugated pipe and perforated plate are embedded in the exhaust channel, along with sound-absorbing materials, achieving multi-stage noise reduction. A rubber sheet is clamped at the connection between the air filter chamber and the intake pipe to buffer connection vibrations, and a rubber connecting seat is installed at the bottom to further absorb structural vibrations during compressor operation. The overall structure, through the coordinated operation of multiple components, effectively reduces multi-source noise during the operation of the air compressor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded schematic diagram of the air intake pipe structure of this utility model;

[0016] Figure 3 This is an exploded schematic diagram of the expansion cavity structure of this utility model;

[0017] In the diagram: 1. Compressor body; 2. Compressor pump chamber; 3. Inlet pipe; 4. Rubber sheet; 5. First connecting ring; 6. Air filter chamber; 7. Second connecting ring; 8. Outlet pipe; 9. Expansion chamber; 10. Converging chamber; 11. Flexible corrugated connecting pipe; 12. Connecting pipe; 13. Filter plate; 14. Spiral air guide vane; 15. Sealing column; 16. First perforated plate; 17. Perforated pipe; 18. Second perforated plate; 19. Air supply pipe; 20. Base; 21. Rubber connecting seat. Detailed Implementation

[0018] 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.

[0019] Obviously, many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Please see Figure 1-3This utility model provides a low-noise air compressor, including a compressor body 1. A compression pump chamber 2 is disposed on the top of the compressor body 1, and an inlet pipe 3 and an outlet pipe 8 are connected to the top of the compression pump chamber 2. A second connecting ring 7 is fixedly connected to the top of the inlet pipe 3, and a rubber sheet 4 is placed on the top of the second connecting ring 7. The second connecting ring 7 and the rubber sheet 4 are connected to a first connecting ring 5 by multiple bolts. An air filter chamber 6 is fixedly connected to the top of the first connecting ring 5, and a filter plate 13 is fixedly connected to the bottom of the air filter chamber 6. A first perforated plate 16 is embedded inside the inlet pipe 3, and a spiral air guide is fixedly connected to the inner surface of the outer surface of the first perforated plate 16. The spiral guide vane 14 is fitted with a closed column 15. An expansion cavity 9 is fixedly sleeved at the bottom end of the outlet pipe 8, and a perforated pipe 17 is fixedly connected to the bottom end of the outlet pipe 8. A gathering cavity 10 is fixedly connected to the bottom of the expansion cavity 9, and a connecting pipe 12 is connected to the bottom of the gathering cavity 10. A flexible corrugated connecting pipe 11 is fixedly connected to the bottom end of the connecting pipe 12, and a supply pipe 19 is fixedly connected to the bottom end of the connecting pipe 12. The bottom end of the supply pipe 19 connects to the inside of the compressor body 1. A second perforated plate is fitted to the inner walls of both the connecting pipe 12 and the supply pipe 19. 18. When the compressor body 1 is working, the intake air is filtered through the air filter chamber 6 and the filter plate 13. The threaded connection between the first connecting ring 5 and the second connecting ring 7 facilitates the installation and removal of the air filter chamber 6. The rubber sheet 4 clamped between the first connecting ring 5 and the second connecting ring 7 helps to buffer the vibration of the first connecting ring 5 and the second connecting ring 7, reducing noise generation. At the same time, air enters the interior of the intake pipe 3 through the spiral guide vane 14. The spiral guide vane 14 sends the gas spirally into the interior of the intake pipe 3. Before entering the compressor chamber 2, the gas is forced to detour due to the spiral flow, and the flow velocity changes slowly, avoiding sudden intake and causing airflow whistling, thus reducing noise generation. When the gas is discharged into the interior of the exhaust pipe 8, the expansion chamber 9 and the gathering chamber 10, as well as the perforated pipe 17, are used to design the exhaust path as an "expansion-contraction-expansion" combination structure before the gas enters the compressor body 1. This mitigates the sudden release of compressed air, reduces sonic boom impact, and the repeated changes in cross-sectional area can effectively disrupt the sound wave propagation path. The rigid exhaust pipe is replaced with or connected in series with a flexible metal corrugated pipe section to avoid airflow reflection in the pipe, which would otherwise form standing wave noise. At the same time, the second perforated plate 18 and the first perforated plate 16 work together with the sound-absorbing cotton to reduce noise. Through the cooperation of the above-mentioned components, the noise generated by the compressor body 1 during operation is reduced.

[0021] To avoid sudden inhalation causing a whistling sound, the spiral air guide 14 is fixedly connected to the inside of the top of the air intake pipe 3, and the spiral air guide 14 is located below the second connecting ring 7, and the outer surface of the sealing column 15 is in contact with the inner wall of the spiral air guide 14.

[0022] To reduce noise at the connection between the first connecting ring 5 and the second connecting ring 7, a second connecting ring 7 is fixedly attached to the top of the air intake pipe 3. A rubber sheet 4 is placed on the top of the second connecting ring 7. The second connecting ring 7 and the rubber sheet 4 are connected to the first connecting ring 5 by multiple bolts. The bottom of the air filter chamber 6 is fixedly attached to the top of the first connecting ring 5. A filter plate 13 is fixedly attached to the bottom of the air filter chamber 6. The second connecting ring 7 is made of rubber and is annular in shape. The inner diameter of the second connecting ring 7 is equal to the diameter of the air intake pipe 3.

[0023] Furthermore, before the gas enters the compressor body 1, the sudden release of compressed air is mitigated, and the generation of noise is reduced. The expansion chamber 9 and the gathering chamber 10 are both funnel-shaped, and the bottom diameter of the expansion chamber 9 is larger than the top diameter, and the top diameter of the gathering chamber 10 is larger than the bottom diameter.

[0024] Furthermore, to facilitate the gas diffusion and aggregation process, the outer surface of the perforated tube 17 is provided with multiple air inlets, and the perforated tube 17 is located inside the expansion cavity 9.

[0025] In order to reduce the noise generated by vibration after the compressor body 1 is installed, two symmetrical bases 20 are fixed to the bottom of the cylinder of the compressor body 1, and a rubber connecting seat 21 is fixed to the bottom of each of the two bases 20. The outer surfaces of the bases 20 and the rubber connecting seat 21 are provided with two symmetrical mounting holes.

[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0027] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0028] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A low-noise air compressor, comprising a compressor body (1), characterized in that: The compressor body (1) has a compressor pump chamber (2) at its top, and the top of the compressor pump chamber (2) is connected to an air inlet pipe (3) and an air outlet pipe (8). The top of the air inlet pipe (3) has an air filter chamber (6). The air inlet pipe (3) has a first perforated plate (16) embedded inside. The outer surface of the first perforated plate (16) is fixedly connected to a spiral guide vane (14), and a sealing column (15) is fixedly inserted inside the spiral guide vane (14). The bottom end of the air outlet pipe (8) is fixedly sleeved with an expansion cavity (9), and the bottom end of the air outlet pipe (8) is fixedly connected to a perforated plate (9). The expansion cavity (9) is fixedly connected to the bottom of the expansion cavity (9) and the bottom of the expansion cavity (9) is connected to the air pipe (12). The bottom end of the air pipe (12) is fixedly connected to the flexible corrugated connecting pipe (11). The bottom end of the flexible corrugated connecting pipe (11) is fixedly connected to the air pipe (12). The bottom end of the air pipe (12) is fixedly connected to the air supply pipe (19). The bottom end of the air supply pipe (19) is connected to the inside of the cylinder of the compressor body (1). The inner walls of the air pipe (12) and the air supply pipe (19) are both fitted with a second perforated plate (18).

2. The low-noise air compressor according to claim 1, characterized in that: The spiral air guide vane (14) is fixed inside the top end of the air inlet pipe (3), and the spiral air guide vane (14) is located below the second connecting ring (7), and the outer surface of the sealing column (15) is in contact with the inner wall of the spiral air guide vane (14).

3. A low-noise air compressor according to claim 1, characterized in that: The top of the air intake pipe (3) is fixedly connected to a second connecting ring (7), and a rubber sheet (4) is placed on the top of the second connecting ring (7). The second connecting ring (7) and the rubber sheet (4) are connected to a first connecting ring (5) by multiple bolt threads. The bottom of the air filter chamber (6) is fixedly connected to the top of the first connecting ring (5). A filter plate (13) is fixedly connected to the bottom of the air filter chamber (6). The material of the second connecting ring (7) is rubber, and the shape of the second connecting ring (7) is ring-shaped. The inner ring diameter of the second connecting ring (7) is equal to the diameter of the air intake pipe (3).

4. A low-noise air compressor according to claim 1, characterized in that: The expansion cavity (9) and the gathering cavity (10) are both trumpet-shaped, and the bottom diameter of the expansion cavity (9) is greater than the top diameter, and the top diameter of the gathering cavity (10) is greater than the bottom diameter.

5. A low-noise air compressor according to claim 1, characterized in that: The perforated tube (17) has multiple air inlets on its outer surface, and the perforated tube (17) is located inside the expansion cavity (9).

6. A low-noise air compressor according to claim 1, characterized in that: The compressor body (1) has two symmetrical bases (20) fixedly connected to the bottom of the cylinder, and the bottom of each of the two bases (20) is fixedly connected to a rubber connecting seat (21), and the outer surfaces of the base (20) and the rubber connecting seat (21) are provided with two symmetrical mounting holes.

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