Air leakage silencer of air compressor and air compressor

Abstract

The air compressor air release silencer comprises a connecting pipe, a first silencer body and a second silencer body, the top end of the connecting pipe is used for being communicated with an air release valve, the second silencer body is connected to the bottom end of the connecting pipe, the first silencer body comprises a silencing pipe and a plurality of annular partition plates, the silencing pipe is arranged on the connecting pipe in a sealed and sleeved mode, and the annular partition plates are arranged on the silencing pipe. The annular partition plates are arranged at intervals in the vertical direction so as to divide the interior of the silencing pipe into a plurality of silencing cavities, the silencing pipe is provided with a plurality of silencing hole units arranged at intervals in the vertical direction, and the bottom end of each silencing cavity is provided with a silencing hole unit so as to be communicated with the interior of the connecting pipe. In this way, each silencing cavity is provided with the silencing hole unit to form the Helmhlot resonator, so that noise enters the silencing cavities from the silencing hole units to be subjected to low-frequency silencing, and then the silencing cavities are combined with the silencing hole units through the connecting pipes to form a parallel communication form, so that the silencing frequency band width is widened, and multi-degree-of-freedom silencing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor silencers, in particular to an air compressor vent silencer and an air compressor. Background Art

[0002] With the development of automobile technology, consumers have higher and higher requirements for automobile comfort, handling, and endurance. Vehicles equipped with air suspension are becoming more and more common. The air suspension system is a suspension system with air springs as elastic elements. Compared with traditional coil springs and leaf springs, air springs have better elastic and damping characteristics, which can better absorb road impacts and vehicle vibrations, and improve vehicle comfort and handling.

[0003] As the core component of the air suspension, the air suspension compressor is mainly responsible for compressing the air into high-pressure gas and providing it to the suspension system. However, when the air suspension compressor is deflated, it will produce a large deflation noise, which is characterized by broadband noise. Although the traditional acoustic package has a good sound absorption and insulation effect in the high-frequency part, in the low-frequency part, due to the small space around the deflation port, the sound absorption and insulation effect of the acoustic package is often not ideal.

[0004] In view of this, it is necessary to propose an air compressor exhaust muffler and an air compressor to solve or at least alleviate the above defects. Summary of the invention

[0005] The main purpose of the present invention is to provide an air compressor venting muffler and an air compressor to solve the problem that the acoustic package in the prior art has unsatisfactory sound absorption and insulation effect in the low-frequency part.

[0006] To achieve the above object, the present invention provides an air compressor exhaust muffler, comprising a connecting pipe, a first muffler and a second muffler; wherein:

[0007] The top end of the connecting pipe is used to communicate with the air release valve, and the second muffler is connected to the bottom end of the connecting pipe;

[0008] The first muffler includes a muffler pipe and a plurality of annular partition plates built in the muffler pipe, the muffler pipe sealing sleeve is arranged on the connecting pipe, the annular partition plates are connected between the connecting pipe and the muffler pipe, and the annular partition plates are arranged at intervals along the vertical direction to divide the interior of the muffler pipe into a plurality of muffler chambers;

[0009] The muffler pipe is provided with a plurality of muffler hole units which are arranged at intervals in the vertical direction, and the bottom end of each muffler chamber is provided with a muffler hole unit which is communicated with the interior of the connecting pipe.

[0010] Preferably, the first muffler also includes a plurality of inner ring plates and outer ring plates which are all built into the muffler pipe, and the inner ring plates and the outer ring plates are arranged in each muffler chamber, the inner ring plates are connected to the connecting pipe and are spaced apart from the inner side wall of the muffler pipe, the outer ring plates are connected to the inner side wall of the muffler pipe and are spaced apart from the connecting pipe, and the inner ring plates and the outer ring plates are arranged alternately and spaced apart in sequence along the vertical direction.

[0011] Preferably, the length of the muffler chamber is gradually reduced from top to bottom.

[0012] Preferably, each of the muffler hole units comprises a plurality of muffler holes spaced apart along the circumference of the muffler pipe.

[0013] Preferably, it further comprises a connecting ring, and the second muffler is connected to the bottom end of the connecting pipe via the connecting ring.

[0014] Preferably, the second muffler is made of polyurethane cotton.

[0015] Preferably, the number of the silencer holes in each of the silencer hole units is twelve, and the twelve silencer holes are arranged at intervals along the circumference of the silencer pipe.

[0016] Preferably, the diameter of each of the muffler holes is 2 mm to 4 mm.

[0017] Preferably, the top end of the connecting pipe is bent.

[0018] The present application also provides an air compressor, comprising an air compressor body and an air relief valve, wherein the air relief valve is connected to the air compressor body, and also comprises the air compressor air relief muffler as described above, wherein the top end of the connecting pipe of the air compressor air relief muffler is connected to the air relief valve.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides an air compressor air leakage silencer and an air compressor, comprising a connecting pipe, a first silencer and a second silencer. The top end of the connecting pipe is used to be connected to the air leakage valve, and the second silencer is connected to the bottom end of the connecting pipe. The first silencer comprises a silencer pipe and a plurality of annular partition plates built into the silencer pipe. The silencer pipe sealing sleeve is arranged on the connecting pipe, and the annular partition plates are connected between the connecting pipe and the silencer pipe. The annular partition plates are arranged at vertical intervals to divide the interior of the silencer pipe into a plurality of silencer chambers. The silencer pipe is provided with a plurality of silencer hole units arranged at vertical intervals, and a silencer hole unit is provided at the bottom end of each silencer chamber to communicate with the interior of the connecting pipe. In this way, a silencer hole unit is opened on each silencer chamber to form a Helmhlotz resonator, so that the noise enters the silencer chamber from the silencer hole unit for low-frequency silencer, and then a plurality of silencer chambers are connected in parallel in combination with the silencer hole unit through a connecting pipe to broaden the silencer bandwidth and form a multi-degree-of-freedom silencer effect. The noise can be significantly reduced, and this structure can meet the demand for broadening the low-frequency silencer bandwidth in a small space, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A cross-sectional perspective schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the overall structure of one embodiment of the present invention;

[0024] Figure 3 A cross-sectional schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional schematic diagram of the overall structure of one embodiment of the present invention;

[0026] Figure 5 It is a schematic elevation diagram of an application scenario of the overall structure in one embodiment of the present invention.

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

[0028] Description of Figure Numbers:

[0029] 10. Connecting pipe; 20. First muffler; 210. Muffler pipe; 211. Muffler chamber; 212. Muffler hole; 220. Annular partition plate; 230. Inner ring plate; 240. Outer ring plate; 30. Second muffler; 310. Connecting ring; 40. Air compressor; 410. Air compressor body; 420. Air relief valve. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Please see attached Figure 1-5 In one embodiment of the present invention, an air compressor 40 exhaust silencer is provided, comprising a connecting pipe 10, a first silencer 20 and a second silencer 30. First of all, it should be noted that, unlike the acoustic package in the prior art, which has a good sound absorption and insulation effect in the high-frequency part, in the low-frequency part, due to the narrow space around the exhaust port, the acoustic package often has an unsatisfactory sound absorption and insulation effect. The present application solves the above-mentioned defects in the prior art by providing an air compressor exhaust silencer, as follows:

[0035] The top end of the connecting pipe 10 is used to communicate with the air release valve 420, and the second muffler 30 is connected to the bottom end of the connecting pipe 10; the first muffler 20 includes a muffler pipe 210 and a plurality of annular partition plates 220 built into the muffler pipe 210, the muffler pipe 210 is sealed on the connecting pipe 10, the annular partition plates 220 are connected between the connecting pipe 10 and the muffler pipe 210, the annular partition plates 220 are arranged at vertical intervals to divide the interior of the muffler pipe 210 into a plurality of muffler chambers 211; the muffler pipe 210 is provided with a plurality of muffler hole units arranged at vertical intervals, and each of the muffler chambers 211 is provided with a muffler hole 212 unit at the bottom end to communicate with the interior of the connecting pipe 10.

[0036] Specifically, the air compressor 40 air release silencer in the present application includes a connecting pipe 10, a first silencer 20 and a second silencer 30. The connecting pipe 10 is used to communicate with the air release valve 420 of the air compressor body 410, and can also be used for the installation and connection of the first silencer 20 and the second silencer 30 to perform sound reduction processing; the first silencer 20 is used to process medium and low frequency sound waves, while the second silencer 30 is used to process high frequency sound waves, which is connected to the bottom end of the connecting pipe 10, so that after the noise enters the connecting pipe 10 from the air release valve 420, the medium and low frequency sound waves are processed by the first silencer 20, and the high frequency sound waves are processed by the second silencer 30; and in the field of sound waves, low, medium and high frequency is a relatively well-known definition term, so its specific scope is not described in detail here.

[0037] Among them, the first silencer 20 includes a silencer pipe 210 and a plurality of annular partition plates 220 built into the silencer pipe 210, the silencer pipe 210 is used to be sealed and sleeved on the connecting pipe 10 to form a sealed chamber with the connecting pipe 10 for sound attenuation and noise reduction, and the annular partition plates 220 are used to divide the interior of the silencer pipe 210 into a plurality of different, respectively sealed silencer chambers 211, and then by opening silencer holes 212 units on the connecting pipe 10 (the bottom of each silencer chamber 211), each silencer chamber 211 is combined with the silencer hole 212 units to form a Helmholtz resonator, the principle of which is that by placing some sound-absorbing materials in a closed cavity and a narrow neck or a small opening connected to the cavity or the like, or covering the opening with a layer of cloth, a resonant sound-absorbing structure can be made, and when sound waves When acting on the opening of the resonator, the air column (neck) at the opening will vibrate due to the pressure change of the sound wave. This vibration compresses or expands the air in the neck, which in turn causes the air in the entire cavity to vibrate accordingly. When the frequency of the external sound wave matches the resonant frequency of the resonator, the amplitude of the sound wave inside the resonator will be amplified. This is because the energy of the sound wave is effectively accumulated inside the resonator. On the contrary, for sound waves of non-resonant frequency, the resonator plays an attenuation role, so it is designed as a sound-absorbing structure to enhance the sound absorption effect; the interior of the connecting pipe 10 is connected, and the silencer hole 212 units opened on the connecting pipe 10 are arranged at intervals along the vertical direction, so that multiple silencer resonators (silencer chamber 211 combined with silencer hole 212 units) are connected in parallel, further forming a multi-degree-of-freedom silencer effect, widening the silencer bandwidth, and reducing noise.

[0038] As a preferred embodiment of the present invention, the first muffler 20 also includes a plurality of inner ring sheets 230 and outer ring sheets 240, all of which are built into the muffler pipe 210, and each of the muffler chambers 211 is provided with the inner ring sheets 230 and the outer ring sheets 240, the inner ring sheets 230 are connected to the connecting pipe 10 and are spaced apart from the inner side wall of the muffler pipe 210, the outer ring sheets 240 are connected to the inner side wall of the muffler pipe 210 and are spaced apart from the connecting pipe 10, and the inner ring sheets 230 and the outer ring sheets 240 are arranged alternately and spaced apart in the vertical direction.

[0039] It should be noted that the inner ring piece 230 is sleeved and connected to the connecting pipe 10 and a gap is reserved between it and the silencer pipe 210, while the outer ring piece 240 is connected to the inner wall of the silencer pipe 210 and a gap is reserved between it and the connecting pipe 10. In this way, after the inner ring piece 230 and the outer ring piece 240 are arranged in a vertically staggered interval, a tortuous channel is formed in each silencer chamber 211. In this way, after the sound wave enters the silencer chamber 211, it will encounter the cavity wall and be reflected. When the frequency of the sound wave matches the natural frequency of the cavity, resonance will occur. At the resonant frequency, the sound wave excites the tortuous cavity to vibrate, and the amplitude reaches the maximum, thereby consuming sound energy and further achieving the purpose of sound absorption.

[0040] As a preferred embodiment of the present invention, the length of the muffler chamber 211 is gradually reduced from top to bottom.

[0041] It should be noted that in this way, different lengths of silencer channels are formed from top to bottom. Different lengths of silencer channels have different silencer frequency widths. The shorter the length of the silencer channel, the higher the silencer frequency. When the silencer channels of different lengths are connected in parallel, the silencer frequency bandwidth is larger and the effect is better than that of the silencer channels of the same length in parallel. It is worth mentioning that the length of the silencer chamber 211 gradually decreases from top to bottom, and the spacing distance between two adjacent silencer hole 212 units is also gradually reduced from top to bottom to correspond to the silencer chamber 211; and such an arrangement can further enhance the effect of sound absorption and noise reduction in a small space.

[0042] As a preferred embodiment of the present invention, each of the muffler hole 212 units includes a plurality of muffler holes 212 spaced apart along the circumference of the muffler pipe 210 .

[0043] It is worth noting that, in this way, each silencer chamber 211 has a plurality of silencer holes 212 along the circumferential direction at the bottom for parallel connection, and the width is further increased after parallel connection. In the present application as a preferred embodiment, the number of silencer holes 212 in each silencer hole 212 unit can be set to twelve, and the aperture of each silencer hole 212 can be set to 2mm~4mm. The specific number and aperture size can also be selected and set by technical personnel in this field according to specific needs.

[0044] As a preferred embodiment of the present invention, it further includes a connecting ring 310 , and the second muffler 30 is connected to the bottom end of the connecting pipe 10 via the connecting ring 310 .

[0045] It is worth noting that the connecting ring 310 is used to fix the second muffler 30 to the bottom of the connecting pipe 10. The connecting ring 310 is connected inside, so that the high-frequency sound waves in the connecting pipe 10 can pass through the connecting ring 310 and enter the second muffler 30 for sound attenuation and noise reduction.

[0046] Furthermore, the second muffler 30 is made of polyurethane cotton.

[0047] It should be noted that polyurethane cotton has a porous structure, which allows sound waves to be reflected and scattered multiple times between the pores after entering the material, converting sound energy into heat energy, achieving a sound absorption effect, especially in the high-frequency band. Therefore, it can be used as the second muffler 30 to absorb high-frequency sound waves.

[0048] Furthermore, the top end of the connecting pipe 10 is bent.

[0049] It should be noted that the bent configuration allows the horizontal portion to be easily connected to the outlet of the air relief valve 420 , while the vertical portion is used for installation and connection of the muffler pipe 210 .

[0050] The present application also provides an air compressor 40, including an air compressor body 410 and an air relief valve 420, wherein the air relief valve 420 is connected to the air compressor body 410, and also includes the air relief muffler of the air compressor 40 as described above, and the top end of the connecting pipe 10 of the air relief muffler of the air compressor 40 is connected to the air relief valve 420.

[0051] It can be understood that the air compressor 40 air leakage silencer of the present application is mainly used to perform sound elimination and noise reduction treatment on the air leakage valve 420 on the air compressor body 410. Therefore, the top end of the connecting pipe 10 of the air compressor 40 air leakage silencer is connected to the air leakage valve 420, and the noise sound waves in the air leakage valve 420 directly enter the connecting pipe 10, and the medium and low frequency sound waves enter each silencer chamber 211 through the silencer hole 212 in the connecting pipe 10, thereby achieving the effect of low frequency silencer, and the high frequency sound waves enter the second silencer 30 from the bottom through the connecting ring 310, thereby achieving the effect of high frequency silencer.

[0052] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air compressor deflation muffler, characterized in that: It includes a connecting pipe, a first muffler and a second muffler; wherein, The top end of the connecting pipe is used to communicate with the air release valve, and the second muffler is connected to the bottom end of the connecting pipe; The first muffler includes a muffler pipe and a plurality of annular partition plates built in the muffler pipe, the muffler pipe sealing sleeve is arranged on the connecting pipe, the annular partition plates are connected between the connecting pipe and the muffler pipe, and the annular partition plates are arranged at intervals along the vertical direction to divide the interior of the muffler pipe into a plurality of muffler chambers; The muffler pipe is provided with a plurality of muffler hole units which are arranged at intervals in the vertical direction, and the bottom end of each muffler chamber is provided with a muffler hole unit which is communicated with the interior of the connecting pipe.

2. The air compressor exhaust muffler according to claim 1, characterized in that: The first muffler also includes a plurality of inner ring plates and outer ring plates which are all built into the muffler pipe, and the inner ring plates and the outer ring plates are arranged in each muffler chamber, the inner ring plates are connected to the connecting pipe and are spaced apart from the inner side wall of the muffler pipe, the outer ring plates are connected to the inner side wall of the muffler pipe and are spaced apart from the connecting pipe, and the inner ring plates and the outer ring plates are arranged alternately and spaced apart in sequence along the vertical direction.

3. The air compressor exhaust muffler according to claim 2, characterized in that: The length of the muffler chamber is gradually reduced from top to bottom.

4. The air compressor exhaust muffler according to claim 2, characterized in that: Each of the muffler hole units includes a plurality of muffler holes spaced apart from each other along the circumference of the muffler pipe.

5. The air compressor exhaust muffler according to claim 1, characterized in that: It also includes a connecting ring, through which the second muffler is connected to the bottom end of the connecting pipe.

6. The air compressor exhaust muffler according to claim 5, characterized in that: The second muffler is made of polyurethane cotton.

7. The air compressor exhaust muffler according to claim 4, characterized in that: The number of the muffler holes in each muffler hole unit is twelve, and the twelve muffler holes are arranged at intervals along the circumference of the muffler pipe.

8. The air compressor exhaust muffler according to claim 7, characterized in that: The diameter of each of the muffler holes is 2 mm to 4 mm.

9. The air compressor exhaust muffler according to claim 1, characterized in that: The top end of the connecting pipe is arranged in a bent shape.

10. An air compressor, comprising an air compressor body and an air relief valve, wherein the air relief valve is connected to the air compressor body, characterized in that: It also includes the air compressor air leakage muffler as described in any one of claims 1 to 9, and the top end of the connecting pipe of the air compressor air leakage muffler is connected to the air leakage valve.

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