Noise reduction device and air compressor

Abstract

The utility model discloses a noise reduction device and an air compressor, and belongs to the technical field of noise reduction of air compressors. The noise reduction device comprises a partition plate and a box body, the box body comprises an inlet and an outlet, the partition plate is arranged in the box body, and the partition plate enables airflow to flow in through the inlet of the box body instead of directly flowing out through the outlet of the box body, but enables a curve type exhaust channel to be formed in the box body. Air flow flows along the curve type exhaust channel, the flowing path of the air flow in the box body is prolonged, and then the air flow flows out from the outlet of the box body. In this way, the noise reduction function can be achieved, the noise of the screw type air compressor can be remarkably reduced, and the influence of the noise on the surrounding environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressor noise reduction, and particularly relates to a noise reduction device and an air compressor. Background Technique

[0002] An air compressor is a device used to compress gas. The air compressor is similar in structure to a water pump. Most air compressors are reciprocating piston type, rotary vane or rotary screw type. Among them, the screw air compressor uses an electric motor or an engine as a power source to drive the main engine to rotate for air compression, and cools the compressed air in the main engine by injecting oil. The air and oil mixture discharged from the main engine passes through two stages of separation, namely rough separation and fine separation, to separate the oil in the compressed air, and finally clean compressed air is obtained.

[0003] When the existing screw air compressor is in use, it makes a relatively loud noise during driving. These noises mainly include the noise generated by the friction of the rotor inside the main engine, the noise generated by the air flow, the noise generated by the operation of the motor, etc. The low frequency is prominent, the propagation distance is far, and the pollution range is large, which has a great impact on the normal work of workers, and is likely to cause damage to the parts inside the screw air compressor, and is likely to reduce the service life of the screw air compressor.

[0004] After retrieval, the authorized announcement number is CN 220622185 U, and the authorized announcement date is March 19, 2024. The patent name is: A screw air compressor for changing the exhaust path to reduce noise. In this application, sound-absorbing cotton is provided on the detachable connection top plate, the detachable connection side plate and the inner side wall of the shell, and the exhaust path is changed by the free connection of the pipe plug and the connecting hose to improve the flexibility of the exhaust path, so as to reduce and absorb the noise generated by vibration. This application mainly reduces and absorbs noise by setting sound-absorbing cotton, and the effect is limited by relying solely on this method. Summary of the Invention

[0005] 1. Technical Problems to be Solved by the Invention

[0006] The utility model provides a noise reduction device and an air compressor. The noise reduction device of the utility model forms a curved exhaust air channel inside it, thereby lengthening the exhaust air process, achieving the purpose of noise reduction, and having a simple structure, easy processing and assembly, and high cost performance.

[0007] 2. Technical Solutions

[0008] To achieve the above object, the technical solutions provided by the utility model are as follows:

[0009] A noise reduction device of the present utility model includes a partition board and a box body. The box body includes an inlet and an outlet. The partition board is arranged inside the box body. The partition board can make the air flow into the box body through the inlet, and instead of flowing directly out of the outlet of the box body, it forms a curved exhaust passage inside the box body. The air flow flows along this curved exhaust passage, extending the flow path of the air flow in the box body, and then flowing out of the outlet of the box body.

[0010] Furthermore, the box body is a hollow cuboid structure. One end face in the length direction of the box body is completely blocked, and the other side is partially blocked to form an air inlet; one end face in the height direction of the box body is completely blocked, and the other side is partially blocked by a cover plate to form an air outlet; both end faces in the width direction of the box body are completely blocked.

[0011] Furthermore, the partition board includes a first partition board and a second partition board, and the first partition board and the second partition board are arranged perpendicular to each other; among them, one end face in the length direction of the box body is partially blocked by the second partition board to form an air inlet; the first partition board is arranged inside the box body, and the first partition board is parallel to both end faces in the height direction of the box body, and an air flow passage is formed inside the box body relative to the other end face in the length direction of the box body.

[0012] Furthermore, the setting position of the air outlet of the box body is close to the position of the air inlet and far from the position of the air flow passage formed by the other end face of the first partition board relative to the length direction of the box body.

[0013] Furthermore, a plurality of partition boards with planar structures are arranged inside the box body, and the plurality of partition boards are parallel to each other and are staggered between both end faces in the height direction of the box body.

[0014] Furthermore, the setting position of the air outlet of the box body is far from the position of the air inlet of the box body.

[0015] Furthermore, holes are opened on the peripheral side of the partition board, and holes are also opened at the corresponding positions on the side face of the box body. The partition board and the box body are connected and fixed by screwing a first bolt into the corresponding holes.

[0016] Furthermore, holes are opened on the peripheral side of the cover plate, and holes are also opened at the corresponding positions on one end face in the height direction of the box body. The cover plate and the box body are connected and fixed by screwing a second bolt into the corresponding holes.

[0017] Furthermore, a first washer is arranged between the first bolt and the box body, and the first bolt and the box body are tightly connected through the first washer; a second washer is arranged between the second bolt and the cover plate, and the second bolt and the cover plate are tightly connected through the second washer.

[0018] Furthermore, sound-absorbing cotton is pasted on the inner wall of the box body and the surface of the partition board.

[0019] A kind of air compressor of the present utility model includes an outer cover. An exhaust port is provided at the top of the outer cover, and an air inlet is provided below the side of the outer cover. The noise reduction device is arranged at the top of the outer cover, and the air flow outlet of the noise reduction device is communicated with the exhaust port of the outer cover. The air in the outer cover of the air compressor flows in from the inlet of the noise reduction device, flows along the curved exhaust air channel formed by the internal partition of the box body, and then flows out from the exhaust port of the outer cover through the outlet of the box body.

[0020] 3. Beneficial effects

[0021] Adopting the technical solution provided by the present utility model, compared with the existing well-known technology, it has the following remarkable effects:

[0022] (1) A kind of noise reduction device of the present utility model sets a partition inside the box body, and forms a curved exhaust air channel inside the box body through the partition, so that after the air flow flows in from the inlet of the box body, it does not directly flow out from the outlet of the box body, but flows along the curved exhaust air channel, extending the flow path of the air flow in the box body, and can achieve the noise reduction function, and can significantly reduce the noise of the screw air compressor and reduce the influence of the noise on the surrounding environment.

[0023] (2) A kind of noise reduction device of the present utility model realizes the assembly between the cover plate, the box body and the partition simply through bolts, has a relatively simple structure and is easy to process, and the cost is relatively low;

[0024] (3) A kind of air compressor of the present utility model installs the noise reduction device on the upper part of the outer cover of the air compressor, leads the air exhaust port of the air compressor to the top, lengthens the distance between the air exhaust port and the air inlet of the air compressor, separates the hot air discharged by the air compressor from the cold air inhaled, and sound-absorbing cotton is pasted on the inner wall of the box body and the surface of the partition of the noise reduction device, so that the noise of the whole machine equipment can be effectively reduced by three-pronged approach. Description of the drawings

[0025] Figure 1 It is an exploded view of the noise reduction device described in Embodiment 1 of the present utility model;

[0026] Figure 2 It is a three-dimensional structure schematic diagram of the noise reduction device described in Embodiment 1 of the present utility model;

[0027] Figure 3 It is a top view of the noise reduction device described in Embodiment 1 of the present utility model;

[0028] Figure 4 It is Figure 3 A-A sectional view of;

[0029] Figure 5 It is an exploded view of the noise reduction device described in Embodiment 2 of the present utility model;

[0030] Figure 6Schematic diagram of the air inlet flow direction of the noise reduction device described in Embodiment 2 of the present utility model;

[0031] Figure 7 Assembly schematic diagram of the noise reduction device of the present utility model.

[0032] Explanation of the reference numerals in the schematic diagram:

[0033] I. Outer cover; II. Air inlet; III. Noise reduction device;

[0034] 1. First gasket; 2. First bolt; 3. Partition; 31. First partition; 32. Second partition; 4. Box body; 5. Second gasket; 6. Second bolt; 7. Cover plate. Detailed implementation manners

[0035] To further understand the content of the present utility model, the present utility model will be described in detail with reference to the accompanying drawings and embodiments.

[0036] A noise reduction device of the present invention includes a partition 3 and a box body 4. The box body 4 has a hollow structure and is provided with an inlet and an outlet. The partition 3 is disposed inside the box body 4. In this embodiment, through the arrangement of the partition 3, after the air flow flows into the box body 4 through the inlet, it does not directly flow out from the outlet of the box body 4, but forms a curved exhaust passage inside the box body 4. The air flow flows along this curved exhaust passage, extending the flow path of the air flow inside the box body 4, and then flows out from the outlet of the box body 4, so as to achieve the noise reduction function, significantly reduce the noise of the screw air compressor, and reduce the impact of the noise on the surrounding environment. Two typical implementation manners are introduced below.

[0037] Embodiment 1

[0038] Combined with Figures 1 to 4 , a noise reduction device of this embodiment, the box body 4 is designed as a hollow cuboid structure. One end face in the length direction of the box body 4 is completely blocked, and the other end face is partially blocked to form an air flow inlet; one end face in the height direction of the box body 4 is completely blocked, and the other end face is partially blocked by a cover plate 7 to form an air flow outlet; both end faces in the width direction of the box body 4 are completely blocked.

[0039] The partition 3 includes a first partition 31 and a second partition 32. The first partition 31 and the second partition 32 are perpendicularly arranged to form an L-shaped structure, and the length of the second partition 32 is shorter than that of the first partition 31. Among them, the second partition 32 is fixed to one end face in the length direction of the box body 4 to partially block this end face in the length direction of the box body 4 and leave an air flow inlet.

[0040] The first partition 31 is disposed inside the box body 4. The first partition 31 extends inside the box body 4 and is arranged parallel to the two end faces in the height direction of the box body 4. And the first partition 31 is spaced from the other end face in the length direction of the box body 4, forming an air flow channel inside the box body 4. Thus, the air flow enters through the inlet of the box body 4, first flows below the first partition 31, then bends through the air flow channel, flows above the first partition 31, and finally flows out through the outlet of the box body 4, extending the flow path of the air flow inside the box body 4. In addition, in this embodiment, the air flow outlet of the box body 4 is arranged near the air flow inlet position and away from the air flow channel formed by the other end face of the first partition 31 in the length direction of the box body 4, maximizing the extension of the air flow path.

[0041] Embodiment 2

[0042] Combined with Figures 5 - 6 , a noise reduction device in this embodiment is provided with a plurality of partitions 3 with planar structures inside the box body 4. The plurality of partitions 3 are parallel to each other and are staggered between the two end faces in the height direction of the box body 4. Here, the staggered arrangement specifically means that for two adjacent partitions 3, one partition 3 is connected to the upper end face of the box body 4, leaving an air flow channel between the partition 3 and the lower end face of the box body 4; the other partition 3 is connected to the lower end face of the box body 4, leaving an air flow channel between the partition 3 and the upper end face of the box body 4. Thus, the air flow enters through the inlet of the box body 4 and forms a zigzag flow trajectory as shown in Figure 6 , thereby achieving the purpose of extending the flow path of the air flow.

[0043] In order to further improve the noise reduction effect, in this embodiment, the partition 3 is further designed to be inclined inside the box body 4 to reduce the impact of the air flow on the partition 3. The setting position of the air flow outlet of the box body 4 is away from the air flow inlet position of the box body 4 to maximize the extension of the air flow path.

[0044] Embodiment 3

[0045] A noise reduction device in this embodiment has holes opened on the peripheral side of the partition 3, and holes are also opened at corresponding positions on the side surface of the box body 4. The partition 3 is connected and fixed to the box body 4 by screwing the first bolt 2 into the corresponding holes.

[0046] Holes are opened on the peripheral side of the cover plate 7, and holes are also opened at corresponding positions on one end face in the height direction of the box body 4. The cover plate 7 is connected and fixed to the box body 4 by screwing the second bolt 6 into the corresponding holes.

[0047] A first washer 1 is arranged between the first bolt 2 and the box body 4, and the first bolt 2 is tightly connected to the box body 4 through the first washer 1; a second washer 5 is arranged between the second bolt 6 and the cover plate 7, and the second bolt 6 is tightly connected to the cover plate 7 through the second washer 5.

[0048] With the connection method of this embodiment, the assembly among the cover plate 7, the box body 4 and the partition plate 3 is simple, easy to process, and the cost is relatively low.

[0049] Embodiment 4

[0050] For a noise reduction device of this embodiment, in order to further improve the noise reduction effect, sound-absorbing cotton is pasted on the inner wall of the box body 4 and the surface of the partition plate 2 of the noise reduction device to reduce and absorb the noise generated during the operation of the air compressor.

[0051] Embodiment 5

[0052] Combined with Figure 7 , an air compressor of this embodiment includes an outer cover I. An exhaust port is arranged at the top of the outer cover I, and an air inlet II is arranged below the side surface of the outer cover I. The noise reduction device described in Embodiment 1 or Embodiment 2, that is Figure 7 the structure indicated by III in the figure, is arranged at the top of the outer cover I. The air flow outlet of the noise reduction device is communicated with the exhaust port of the outer cover I. The air in the outer cover I of the air compressor flows in from the inlet of the noise reduction device, flows along the curved exhaust air channel formed by the partition plate 3 inside the box body 4, and then flows out from the exhaust port of the outer cover through the outlet of the box body 4.

[0053] This embodiment mainly reduces noise by changing the exhaust air flow direction. According to the physical characteristics of hot air, under the same conditions, the hotter the air, the lower its density, and the lower the density, the more it will flow upward. In this embodiment, the exhaust port of the air compressor is led to the top, the noise reduction device is arranged above the air compressor, and the air flow outlet of the noise reduction device is directly communicated to the outside of the air compressor shell, so that all the hot air can be discharged as soon as possible without backflow. And the exhaust port of the air compressor is arranged at the top, which also lengthens the distance from the air inlet of the air compressor, separating the hot air discharged by the air compressor from the cold air inhaled. In this way, the air discharged by the air compressor enters through the lower inlet of the noise reduction device and is discharged from the upper outlet, further extending the exhaust air line, thereby realizing the function of reducing noise. At the same time, the sound-absorbing cotton inside the box body 4 can also absorb part of the noise, enhancing the noise reduction effect.

[0054] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A noise reduction device, characterized in that: The invention comprises a partition (3) and a box (4), wherein the box (4) comprises an inlet and an outlet, and the partition (3) is arranged inside the box (4). The partition (3) enables airflow to flow into the box (4) through the inlet, but not to flow out directly from the outlet of the box (4), but to form a curved exhaust passage inside the box (4), so that the airflow flows along the curved exhaust passage, extending the flow path of the airflow inside the box (4), and then flows out from the outlet of the box (4).

2. A noise reduction device according to claim 1, characterized in that: The box body (4) is a hollow rectangular parallelepiped structure. The two end faces of the box body (4) in the length direction are completely blocked on one side and partially blocked on the other side to form an airflow inlet. The two end faces of the box body (4) in the height direction are completely blocked on one side and partially blocked on the other side by a cover plate (7) to form an airflow outlet. The two end faces of the box body (4) in the width direction are completely blocked.

3. A noise reduction device according to claim 2, characterized in that: The partition (3) comprises a first partition (31) and a second partition (32), wherein the first partition (31) and the second partition (32) are arranged perpendicular to each other; wherein one end face of the box body (4) in the length direction is partially blocked by the second partition (32) to form an air flow inlet; the first partition (31) is arranged inside the box body (4), and the two end faces of the first partition (31) in the height direction are arranged parallel to the box body (4), and the other end face of the first partition (31) in the length direction is opposite to the box body (4), so as to form an air flow channel inside the box body (4).

4. A noise reduction device according to claim 3, characterized in that: The airflow outlet of the box body (4) is arranged at a position close to the airflow inlet position and away from the airflow channel position formed by the other end surface of the first partition plate (31) relative to the box body (4) in the length direction.

5. A noise reduction device according to claim 2, characterized in that: A plurality of planar partitions (3) are arranged inside the box body (4); the plurality of partitions (3) are parallel to each other and are staggered between the two end surfaces in the height direction of the box body (4).

6. A noise reduction device according to claim 5, characterized in that: The airflow outlet of the box (4) is arranged at a position far away from the airflow inlet of the box (4).

7. A noise reduction device according to any one of claims 2 to 6, characterized in that: The partition plate (3) is provided with a hole on its circumferential side, and the corresponding position of the side surface of the box body (4) is also provided with a hole, and the partition plate (3) and the box body (4) are connected and fixed by screwing the first bolt (2) into the corresponding hole.

8. A noise reduction device according to claim 7, characterized in that: The cover plate (7) is provided with a hole on its circumferential side, and a hole is also provided at a corresponding position on one end surface in the height direction of the box body (4). The second bolt (6) is screwed into the corresponding hole to achieve connection and fixation between the cover plate (7) and the box body (4).

9. A noise reduction device according to claim 8, characterized in that: The inner wall of the box body (4) and the surface of the partition (3) are both provided with sound-absorbing cotton.

10. An air compressor, comprising an outer cover, characterized in that: An exhaust port is arranged at the top of the outer cover, and an air inlet is arranged at the lower side of the outer cover. The noise reduction device as described in any one of claims 1 to 9 is arranged at the top of the outer cover, and the air flow outlet of the noise reduction device is connected with the exhaust port of the outer cover. The air in the outer cover of the air compressor flows into from the inlet of the noise reduction device, flows along the curved exhaust channel formed by the internal partition (3) of the box body (4), and then flows out from the exhaust port of the outer cover through the outlet of the box body (4).

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