Air leakage silencer of air compressor and air compressor

Abstract

The utility model provides an air compressor air release silencer and air compressor, including connecting pipe, first silencer and second silencer, connecting pipe top is used for being communicated with air release valve setting, the second silencer is connected to connecting pipe bottom, first silencer includes silencing pipe and a plurality of annular partition plate, silencing pipe seal sleeve is provided on connecting pipe, and the annular partition plate is provided with a plurality of annular partition plate. 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 utility model relates to the technical field of air compressor silencers, in particular to an air compressor deflation 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. Vehicle models 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 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. This noise is characterized by broadband noise. Although traditional acoustic bags have good sound absorption and insulation effects 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 bag is often not ideal.

[0004] In view of this, it is necessary to propose an air compressor deflation muffler and an air compressor to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of the utility model is to provide an air compressor deflation muffler and an air compressor, so as to solve the problem that the acoustic package in the prior art has unsatisfactory sound absorption and insulation effects in the low-frequency part.

[0006] To achieve the above-mentioned purpose, the utility model provides an air compressor deflation 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 into the muffler pipe, the muffler pipe sealing sleeve is provided 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 spaced apart vertically, and the bottom end of each muffler chamber is provided with a muffler hole unit to communicate with the interior of the connecting pipe.

[0010] Preferably, the first muffler also includes a plurality of inner ring plates and outer ring plates, all of which are built into the muffler pipe, and each of the muffler chambers is provided with the inner ring plates and the outer ring plates, 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 in a staggered manner in 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 includes a plurality of muffler holes spaced apart along the circumference of the muffler pipe.

[0013] Preferably, a connecting ring is further included, 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 tube is bent.

[0018] The present application also provides an air compressor, including an air compressor body and an air relief valve, wherein the air relief valve is connected to the air compressor body, and also includes the air compressor air relief muffler as described above, and 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 utility model provides an air compressor air discharge 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 discharge 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 provided 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 be connected to 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. Then, through the connecting pipe, multiple silencer chambers are connected in parallel with the silencer hole units to widen 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 widening 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0022] Figure 1 This is a cross-sectional perspective diagram of the overall structure of an embodiment of the present invention;

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

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

[0025] Figure 4 A cross-sectional schematic diagram of the overall structure of an embodiment of the present invention;

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

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and 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 intended 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various 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 this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] Please see the attached Figure 1-5 In one embodiment, the present invention provides an air compressor 40 deflation muffler, comprising a connecting pipe 10, a first muffler 20, and a second muffler 30. First, it should be noted that, unlike the acoustic bag 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 deflation port, the sound absorption and insulation effect of the acoustic bag is often not ideal. This application solves the above-mentioned defects in the prior art by providing an air compressor deflation muffler, which is specifically as follows:

[0035] The top end of the connecting pipe 10 is used to be connected to 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 holes 212 units arranged at vertical intervals, and the bottom end of each of the muffler chambers 211 is provided with a muffler hole 212 unit to communicate with the interior of the connecting pipe 10.

[0036] Specifically, the air compressor 40 air discharge 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 discharge 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 absorption and noise 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 discharge 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 connected to the connecting pipe 10 to form a sealed chamber with the connecting pipe 10 for sound insulation 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, individually sealed silencer chambers 211, and then by opening silencer holes 212 units on the connecting pipe 10 (at 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 material in the silencer chamber 211 or covering the opening with a layer of cloth in a closed cavity and a narrow neck or a small opening connected to the cavity, a resonant sound-absorbing structure can be made. 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 causes the air in the neck to be compressed or expanded, 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 holes 212 units opened on the connecting pipe 10 are arranged at intervals along the vertical direction, so that multiple silencer resonators (the silencer chamber 211 and the silencer hole 212 units are combined) are connected in parallel, further forming a multi-degree-of-freedom silencer effect, broadening the silencer frequency bandwidth, and reducing noise.

[0038] As a preferred embodiment of the present invention, the first muffler 20 also includes a plurality of inner ring pieces 230 and outer ring pieces 240, all of which are built into the muffler pipe 210. Each of the muffler chambers 211 is provided with the inner ring piece 230 and the outer ring piece 240. The inner ring piece 230 is connected to the connecting pipe 10 and is spaced apart from the inner side wall of the muffler pipe 210. The outer ring piece 240 is connected to the inner side wall of the muffler pipe 210 and is spaced apart from the connecting pipe 10. The inner ring piece 230 and the outer ring piece 240 are arranged in a staggered manner 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 vertical staggered manner, 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, silencer channels of different lengths are formed from top to bottom. The lengths of the silencer channels are different, and the silencer frequency widths are different. When the length of the silencer channel is smaller, the silencer frequency is higher. 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 connected 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 sound absorption and noise reduction effect 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, there are multiple silencer holes 212 along the circumferential direction at the bottom of each silencer chamber 211 for parallel connection, and the width is further increased after parallel connection. In this application as a preferred embodiment, the number of silencer holes 212 in each of the silencer hole 212 units 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 those skilled in the art according to specific needs.

[0044] As a preferred embodiment of the present invention, a connecting ring 310 is further included, and the second muffler 30 is connected to the bottom end of the connecting pipe 10 through 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 interior of the connecting ring 310 is through, 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 a 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 compressor 40 air relief muffler as described above, and the top end of the connecting pipe 10 of the air compressor 40 air relief muffler is connected to the air relief valve 420.

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

[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 into the muffler pipe, the muffler pipe sealing sleeve is provided 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 spaced apart in a vertical direction, and the bottom end of each muffler chamber is provided with a muffler hole unit to communicate with the interior of the connecting pipe.

2. The air compressor deflation muffler according to claim 1, characterized in that: The first muffler also includes a plurality of inner ring plates and outer ring plates, all of which are built into the muffler pipe. The inner ring plates and the outer ring plates are provided in each of the muffler chambers. 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. The inner ring plates and the outer ring plates are arranged in a staggered manner in the vertical direction.

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

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

7. The air compressor deflation 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 deflation 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 deflation 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 deflation muffler according to any one of claims 1 to 9, wherein the top end of the connecting pipe of the air compressor deflation muffler is connected to the deflation valve.

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