TWI727808B - Noise reduction device of air compressor - Google Patents

Abstract

A noise reduction device for an air compressor, which is assembled at the intake end of the air compressor, the noise reduction device has a noise reduction air return box, and a plurality of groups of air intake small pipes arranged in the noise reduction return air box, The air intake pipe, the return air pipe and the return air pipe, the air intake pipe and the return air pipe are respectively sleeved on the outside of the air intake pipe and the return air pipe, so as to reduce the noise of the gas in the return box The path instantly moves in the reverse direction to change the movement path. The aforementioned change of the gas movement path is mainly to reduce the flow rate of the gas, which can effectively reduce the noise generated by the gas.

Description

Noise reduction device of air compressor

The present invention relates to a noise reduction device for an air compressor, in particular to a noise reduction device that uses pipe bodies of different pipe diameters to be sleeved together to change the gas moving path.

Press, the air compressor is mainly used to produce high-pressure gas, and then the high-pressure gas drives pneumatic tools for processing operations. For example, the Republic of China Patent Certificate No. M325394 "Air Compressor Structure Improvement" is a common air compressor. When the compressor is compressing while inhaling external air, the air compressor’s intake end will produce a lot of gas noise due to the fast gas flow rate, causing noise pollution in the working environment. In order to effectively reduce the noise, the industry has related technologies, such as US Patent Publication No. US20180283367A1 "Air Compressor Noise Dampener", which uses gas to impact the baffle to change the gas travel path to reduce the gas moving speed, thereby achieving the purpose of reducing gas noise. Therefore, the technology of air compressor intake noise reduction has gradually It is emphasized that the present invention provides another noise reduction device, so that the demander can choose the suitable one.

Therefore, the object of the present invention is to provide a noise reduction device for an air compressor that can effectively reduce intake noise.

Therefore, the noise reduction device of the air compressor of the present invention is assembled at the intake end of the air compressor to reduce the noise of the intake air. The air compressor has at least one air duct, and the noise reduction device has a noise reduction return. Air box, and multiple arrays of small air intake pipes, large air intake pipes and large return air pipes in the noise reduction return air box The noise-reducing return air box includes an air inlet chamber, a return air chamber and an exhaust chamber which are adjacent to each other in sequence, and the air inlet chamber is provided with at least one air inlet for external air to enter. , The exhaust chamber is provided with at least one exhaust port communicating with the intake end of the air compressor, each small intake pipe is connected to the intake chamber, and each large intake pipe is covered with the corresponding intake The outside of the small pipe and the inside of the two are in communication with each other. In addition, the end of each large intake pipe facing the intake chamber forms an open first air return end, and each return air small pipe is connected to the exhaust chamber. The large air pipe is sleeved on the outside of the corresponding return air pipe and the two interiors are in communication with each other. In addition, the end of each return air pipe facing the exhaust chamber forms an open second return air end. The end and the second return air end are connected to the return air chamber. When the external air enters the air inlet chamber, it enters the inside of the main intake pipe through the small air inlet pipes, and then flows into the return air chamber from the first air return end. Then it enters the large return air pipe through the second return air end, and finally enters the exhaust chamber from the small return air pipe, and then is sent to the air compressor through the exhaust port; the present invention uses the large intake pipe and the return air The design of the large pipes respectively sleeved on the outside of the inlet pipe and the return pipe allows the gas travel path to instantly reversely move to change the travel path. The aforementioned change of the gas travel path is mainly to reduce the gas flow rate, so that the gas can be effectively reduced The noise produced.

1: Noise reduction device

2: Air compressor

21: Airway

22: Air filter

3: Noise reduction air return box

31: intake chamber

311: Air Inlet

32: The first baffle

33: Return chamber

34: exhaust chamber

341: Exhaust Port

35: second baffle

36: intake clearance

37: Exhaust gap

4: intake pipe

5: Air intake pipe

51: first return air end

6: Return air pipe

61: second air return

7: Return air tubule

8: Silencing cotton cover

9: Expansion group

91: special diameter pipe

Figure 1 is a perspective view of the connection between an air compressor and a noise reduction device in a preferred embodiment of the present invention.

Fig. 2 is a partial anatomical perspective view of a noise reduction device of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the noise reduction device of the present invention.

Figure 4 is a cross-sectional view of another preferred embodiment of the noise reduction device of the present invention.

Referring to Figures 1 to 3, a preferred embodiment of the present invention is a noise reduction device 1 and a The air compressor 2 that is started or closed is connected for use. It is assembled at the air inlet end of the air compressor 2 to reduce the noise of the air inlet. The air inlet end of the air compressor 2 is externally connected with three pilots in this embodiment. Air pipe 21. The noise reduction device 1 has a noise reduction air return box 3, and multiple groups of air intake small pipes 4, air intake large pipes 5, return air large pipes 6 and return air small pipes 7 arranged in the noise reduction return air box 3 , And most of the noise-reducing cotton sleeves 8 covering the outside of the small intake pipe 4, the large intake pipe 5, the large return pipe 6 and the small return pipe 7, the noise reduction return box 3 includes an intake air Chamber 31, a first baffle 32, a return air chamber 33, an exhaust chamber 34, and a second baffle 35. The air inlet chamber 31 has two air inlets 311 for external air to enter. In this embodiment In the example, the air inlets 311 can be connected to an air filter 22 respectively, that is, the external air is first filtered by the air filter 22 and then enters the air inlet chamber 31 to prevent dust from entering the noise reduction air return box 3 Inside, the first baffle 32 is obliquely installed in the intake chamber 31 to change the path of gas entering the intake chamber 31, and an intake gap 36 is formed between its two ends and the intake chamber 31, respectively. The exhaust chamber 34 is provided with three exhaust ports 341 communicating with the air ducts 21 of the air compressor 2, and the second baffle 35 is obliquely installed in the exhaust chamber 34 to change the entry into the exhaust chamber 34 The path of the internal gas, and an exhaust gap 37 is formed between its two ends and the exhaust chamber 34 respectively. The aforementioned small intake pipes 4, large intake pipes 5, large return air pipes 6 and small return air pipes 7 are assembled In the return air chamber 33, each small intake pipe 4 is also in communication with the intake chamber 31, and each large intake pipe 5 is shrouded outside of the corresponding small intake pipe 4 and the insides of the two are in communication with each other. , The end of each large intake pipe 5 facing the intake chamber 31 forms an open first return end 51, and the large return pipe 6 and the small return pipe 7 are arranged in the small intake pipe 4 and the large intake pipe Above 5, each return air pipe 7 is connected to the exhaust chamber 34, each return air pipe 6 is sheathed outside the corresponding return air pipe 7 and the two interiors are in communication with each other, and each return The end of the large air pipe 6 facing the exhaust chamber 34 forms an open second air return end 61. The first air return end 51 and the second air return end 61 are both connected to the air return chamber 33. The sound-absorbing cotton sleeves 8 are Blocked at the first air return end 51 of the large air intake pipe 5 and the second air return end 61 of the large air return pipe 6 respectively, and are respectively connected to the intake chamber 31 The wall surface of the exhaust chamber 34 is in contact with each other to form a closed state, so that the gas can only penetrate into the return air chamber 33 and the return air pipe 6.

When the air compressor 2 is running, after the external air enters the intake chamber 31 through the air cleaner 22, it will first hit the first baffle 32. At this time, the gas changes path and fills the intake chamber 31 through the intake gap 36 on both sides. , Then enter the small intake pipes 4 and the large intake pipe 5 in sequence, and then are discharged from the first air return end 51 and pass through the muffler cotton cover 8 into the return air chamber 33, and the gas in the return air chamber 33 again Pass through the silencer cotton cover 8 and enter the return air pipe 6 through the second air return end 61, and be guided by the return air pipe 7 into the exhaust chamber 34 and hit the second baffle 35. At this time, the air is exhausted from both sides. The gap 37 fills the exhaust chamber 34 and is guided into the air compressor 2 through the air ducts 21.

In the design of the noise reduction device 1 of the present invention, the large air intake pipe 5 and the large return air pipe 6 are respectively sleeved outside the small air intake pipe 4 and the small air return pipe 7, so that the traveling path of the gas can instantly move in reverse, and With the arrangement of the first baffle 32 and the second baffle 35, the gas can also change the movement path. The aforementioned change of the gas movement path is mainly to reduce the gas flow rate, so that the noise generated by the gas can be effectively reduced, and the gas The sound-absorbing cotton cover 8 can disperse the air flow and further reduce the generation of noise.

It is worthy of further explanation that in the design, according to the demand for noise reduction, a sound-absorbing cotton sleeve 8 or other forms of sound-absorbing cotton material can be appropriately added in the return air chamber 33, such as a sheet-shaped sound-absorbing cotton (not shown in the figure). ) Is filled in the space of the return air chamber 33 to achieve a better noise reduction effect.

Please refer to Figure 4, the structure of the noise reduction device 1 of another preferred embodiment of the present invention is roughly the same as that of the previous embodiment. It also includes a noise reduction return air box 3, a plurality of small intake pipes 4, a large intake pipe 5, The main difference between the large return air pipe 6, the small return air pipe 7 and the noise-absorbing cotton cover 8 is that the noise reduction device of this embodiment The set 1 further includes an expansion tube group 9, which is composed of a plurality of special diameter tubes 91, which can be sleeved on the outside of the air inlet pipe 5 and the return air pipe 6 respectively, one end is in a closed state, and the other One end is connected to the return air chamber 33. At this time, the sound-absorbing cotton sleeves 8 are respectively sleeved on the outside of the special diameter pipes 91. By adding the special diameter pipes 91 to increase the gas flow path, it can be more effective Reduce the noise of the air flow; however, the special diameter pipe 91 of the expansion group 9 of this embodiment can be designed with many different pipe diameters, and the special diameter pipes 91 of different pipe diameters can be arranged inside each other to increase the gas flow in a timely manner Path to achieve the best noise reduction effect.

1: Noise reduction device

22: Air filter

3: Noise reduction air return box

31: intake chamber

311: Air Inlet

32: The first baffle

33: Return chamber

34: exhaust chamber

341: Exhaust Port

35: second baffle

36: intake clearance

37: Exhaust gap

4: intake pipe

5: Air intake pipe

6: Return air pipe

7: Return air tubule

8: Silencing cotton cover

Claims (5)

A noise reduction device of an air compressor, which is assembled at the intake end of the air compressor to reduce the noise of the intake air. The noise reduction device has a noise reduction air return box, and a plurality of groups are arranged in the noise reduction return In the air box, the small air intake pipe, the large air intake pipe, the large air return pipe and the small air return pipe. The noise reduction return air box includes an air inlet chamber, a return air chamber and an exhaust chamber respectively adjacent to each other in sequence. The inlet chamber is provided with at least one inlet for external air to enter, the outlet chamber is provided with at least one outlet communicating with the inlet end of the air compressor, and each inlet pipe is connected with the inlet chamber , Each large intake pipe is shrouded on the outside of the corresponding small intake pipe and the two interiors are in communication with each other. Moreover, the end of each large intake pipe facing the intake chamber forms an open first return end. A small return air pipe is connected to the exhaust chamber, each large return air pipe is sheathed outside the corresponding small return air pipe and the two interiors are in communication with each other, and each large return air pipe faces one end of the exhaust chamber An open second air return end is formed. The first air return end and the second air return end are connected to the air return chamber. When the external air enters the air inlet chamber, it enters the inside of the air inlet pipe through the small air inlet pipes , And then merge into the return air chamber from the first return air end, then enter the return air main pipe through the second return air end, and finally enter the exhaust chamber from the return air small pipe, and then pass to the air outlet through the exhaust port. The intake side of the press. According to the noise reduction device of the air compressor according to the first item of the scope of patent application, the noise reduction return air box further includes a first baffle and a first baffle respectively disposed in the intake chamber and the exhaust chamber. Two baffles, the first baffle is obliquely installed in the intake chamber to change the path of gas entering the intake chamber, and an intake gap is formed between its two ends and the intake chamber. The second baffle The system is obliquely arranged in the exhaust chamber to change the path of the gas entering the exhaust chamber, and an exhaust gap is formed between the two ends and the exhaust chamber respectively. According to the noise reduction device of the air compressor described in the second item of the scope of patent application, the noise reduction device further has a plurality of noise-absorbing cotton sleeves covering the outside of the air intake pipe and the return air pipe. According to the noise reduction device of the air compressor described in item 2 of the scope of patent application, the noise reduction device further has an expansion tube group and a plurality of sound-absorbing waddings. The expansion tube group is composed of a plurality of special diameter pipes. They can be respectively sleeved on the outside of the large intake pipe and the large return pipe, one end is in a closed state, and the other end is connected with the return air chamber, and the silencer cotton sleeves are respectively sleeved outside the special diameter pipes. According to the noise reduction device of the air compressor described in item 4 of the scope of patent application, the pipe expansion group has a plurality of special-diameter pipes with different pipe diameters, which can be respectively installed inside each other to increase the gas flow path.

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