CN110230532A - A kind of exhaust pipe of high-efficient noise-reducing sound - Google Patents
A kind of exhaust pipe of high-efficient noise-reducing sound Download PDFInfo
- Publication number
- CN110230532A CN110230532A CN201910552489.6A CN201910552489A CN110230532A CN 110230532 A CN110230532 A CN 110230532A CN 201910552489 A CN201910552489 A CN 201910552489A CN 110230532 A CN110230532 A CN 110230532A
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- Prior art keywords
- resonant cavity
- pipe
- expansion chambers
- expansion
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005192 partition Methods 0.000 claims description 25
- 239000011358 absorbing material Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000008520 organization Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000000644 propagated effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The present invention relates to a kind of exhaust pipes of high-efficient noise-reducing sound, including cylinder, air inlet pipe, escape pipe and hush pipe, expansion cavity, the first resonant cavity, the second resonant cavity and third resonant cavity are provided in cylinder, air inlet pipe is connected to expansion cavity, escape pipe is connected to third resonant cavity, hush pipe is arranged in the first resonant cavity, and both ends are respectively communicated with and portal in being provided with first on expansion cavity and third resonant cavity, hush pipe；A part of escape pipe is stretched in the second resonant cavity by third resonant cavity, and the part is provided with second and portals, and another part is passed through on the outside of third resonant cavity to cylinder by the second resonant cavity.The present invention passes through in expansion cavity, the first resonant cavity, the second resonant cavity and third resonant cavity treatment process in gas, and the movement travel of noise greatly increases, so that the time that reducing noise is propagated, improves noise reduction effect.
Description
Technical field
The present invention relates to automobile exhaust pipe technical field, in particular to a kind of exhaust pipe of high-efficient noise-reducing sound.
Background technique
The exhaust pipe of automobile is one of noise main source of vehicle all the time.Its noise generally has high-speed flow stream
Produced by dynamic unstability.The air-flow of flowing has the characteristics that high temperature, high pressure, high speed, noise intensity height, the frequency spectrum of discharge
It is wide and involve that range is wide, seriously affect the health of driver and passenger and the production and living of resident.
Such as: application No. is 201220053248.0 Chinese utility model patents to disclose a kind of automobile exhaust of noise reduction
Pipe, including exhaust pipe, the exhaust pipe are divided into top connection, lower contact and cylinder three parts, and the top connection, lower contact are in funnel
Shape, the exhaust pipe are equipped with several silencers and thin-walled liner, and thin-walled liner quantity is few, and noise reduction effect is limited, and thin
Through-hole on wall liner is easy blocking, hinders air-flow flowing.
Summary of the invention
The object of the present invention is to provide a kind of exhaust pipes of high-efficient noise-reducing sound, improve the noise-reducing effect of exhaust pipe.
Above-mentioned purpose of the invention has the technical scheme that a kind of exhaust pipe of high-efficient noise-reducing sound,
Including cylinder, air inlet pipe, escape pipe and hush pipe, be provided in the cylinder expansion cavity, the first resonant cavity, the second resonant cavity and
Third resonant cavity, the air inlet pipe are connected to expansion cavity, and the escape pipe is connected to third resonant cavity, and the hush pipe setting exists
In first resonant cavity, and both ends are respectively communicated with to go out in being provided with first on expansion cavity and third resonant cavity, the hush pipe
Hole；A part of the escape pipe is stretched in the second resonant cavity by third resonant cavity, and the part is provided with second and portals, separately
A part is passed through on the outside of third resonant cavity to cylinder by the second resonant cavity.
Preferably, sleeve is socketed on the outside of the hush pipe, between the outer wall of the hush pipe and the inner wall of sleeve
Filled with deadener.
Preferably, the internal diameter of the hush pipe is gradually increased from both ends to centre, drum organization is formed.
Preferably, the inner wall of the third resonant cavity is hollow structure, and multilayer resonance region is separated by inside panel,
The through-hole for being connected to third resonant cavity and resonance region is provided on the inside panel.
Sound wave is constantly mutually reflected in inside panel after being entered in each layer resonance region by through-hole, until sound wave consumption is dangerous
To the greatest extent.
Preferably, the aperture for the through-hole being located on the inside panel of inside is greater than the through-hole on the inside panel in outside
Aperture.
Preferably, being provided with the protrusion for protruding from plate face in the plate face of the inside panel being located in resonance region, it is located at
Sound-absorbing blind hole is provided in plate face between two neighboring protrusion.
The protrusion and sound-absorbing blind hole can change the reflection path of sound wave, extend the reflection interval of sound wave.
Preferably, the expansion cavity is separated into multiple expansion chambers by partition, including be arranged successively the first expansion chambers,
Second expansion chambers and third expansion chambers are connected between two neighboring expansion chambers by filter opening, and the air inlet pipe passes through the first expansion
It is protruded into third expansion chambers after room and the second expansion chambers, one end of the hush pipe is connected to the second expansion chambers.
Portal preferably, being located at and being provided with third in the indoor air inlet pipe of first expansion, first expansion chambers
It is interior to be filled with sound-absorbing material.
When air-flow enters in air inlet pipe, most high frequency sound wave is portalled by third into the first expansion chambers, and
It is absorbed by the first indoor sound-absorbing material of expansion, completes preliminary noise reduction.
Preferably, the partition is divided into stationary barrier and float partition, the stationary barrier be located at the first expansion chambers with
It between second expansion chambers and is fixed in expansion cavity, the float partition is between the second expansion chambers and third expansion chambers, institute
It states float partition to be sleeved in air inlet pipe, is provided within second expansion chambers and float partition is pushed to move to far from partition direction
Dynamic dynamic clamping head and quiet clamping head.
When the air-flow in air inlet pipe is larger, air-flow pushes float partition reverse movement after entering third expansion chambers, thus
The space for increasing third expansion chambers, makes noise sound wave be reflected, be absorbed in larger space, only near filter opening intrinsic frequency
A small number of frequencies sound wave could by filter opening enter the second expansion chambers；When air-flow reduces, the noise accordingly generated is smaller, this
When float partition resetted under the action of dynamic clamping head and quiet clamping head, third expansion chambers space reduce, air-flow is quickly through third expansion chambers
Enter the second expansion chambers afterwards.
The invention has the following advantages:
1, the present invention passes through in expansion cavity, the first resonant cavity, the second resonant cavity and third resonant cavity treatment process in gas, noise
Movement travel greatly increase, thus reducing noise propagate time, improve noise reduction effect；
2, the inner wall of third resonant cavity is hollow structure, and sound wave passes through after through-hole enters in each layer resonance region constantly in inside panel
It is mutually reflected, extends the reflection interval of sound wave, until sound wave is depleted；
3, movable float partition can be moved with the variation of the intensity of air-flow, to adaptively change third expansion chambers
Space size.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of the embodiment of the present invention 2；
In figure: 1- cylinder, 11- expansion cavity, the first expansion chambers of 111-, the second expansion chambers of 112-, 113- third expansion chambers, 12-
One resonant cavity, the second resonant cavity of 13-, 14- third resonant cavity, 15- partition, 15A- stationary barrier, 15B- float partition, 16- filter
Hole, 17- dynamic clamping head and quiet clamping head, 2- air inlet pipe, 21- third are portalled, 3- escape pipe, and 31- second portals, 4- hush pipe, and 41- first goes out
Hole, 5- sleeve, 6- inside panel, 61- through-hole, 62- protrusion, 63- sound-absorbing blind hole, 7- resonance region.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Embodiment 1: as depicted in figs. 1 and 2, a kind of exhaust pipe of high-efficient noise-reducing sound, including cylinder 1, air inlet pipe 2, outlet
Pipe 3 and hush pipe 4 are provided with expansion cavity 11, the first resonant cavity 12, the second resonant cavity 13 and third resonant cavity 14 in cylinder 1, expand
It opens chamber 11 and third resonant cavity 14 is located at the both ends of cylinder 1, the first resonant cavity 12 and the second resonant cavity 13 are located in cylinder 1
Portion.
Air inlet pipe 2 is connected to expansion cavity 11, and escape pipe 3 is connected to third resonant cavity 14, and the setting of hush pipe 4 is in the first resonance
In chamber 12, and both ends are respectively communicated with and portal 41 in being provided with first on expansion cavity 11 and third resonant cavity 14, hush pipe 4, noise reduction
Pipe 4 portals 41 the first resonant cavities of connection 12 by first.
Escape pipe 3 is in U-shape warp architecture, and part of it is stretched in the second resonant cavity 13 by third resonant cavity 14, and should
Part is provided with second and portals 31, and escape pipe 3 portals by second 31 to be connected to the second resonant cavity 13, and another part is total to by second
The chamber 13 that shakes passes through third resonant cavity 14 to 1 outside of cylinder.
The outside of hush pipe 4 is socketed with sleeve 5, and sleeve 5 is wrapped in first and portals 41 outsides.The outer wall and set of hush pipe 4
Deadener is filled between the inner wall of cylinder 5, deadener is foaming aluminum.
As shown in Fig. 2, the inner wall of third resonant cavity 14 is hollow structure, and is separated into multilayer resonance region by inside panel 6
7, the through-hole 61 for being connected to third resonant cavity 14 Yu resonance region 7 is provided on inside panel 6.On the inside panel 6 of inside
The aperture of through-hole 61 is greater than the aperture of the through-hole 61 on the inside panel 6 in outside.The plate of inside panel 6 being located in resonance region 7
It is provided with the protrusion 62 for protruding from plate face on face, is provided with sound-absorbing blind hole 63 in the plate face between two neighboring raised 62.
Expansion cavity 11 is separated into multiple expansion chambers by partition 15, and the first expansion chambers 111, second including being arranged successively expand
Room 112 and third expansion chambers 113 are opened, are connected between two neighboring expansion chambers by filter opening 16, the air inlet pipe 2 passes through first and expands
It is protruded into third expansion chambers 113 after opening room 111 and the second expansion chambers 112, one end of the hush pipe 4 is connected to the second expansion chambers
112.It is provided with third in the air inlet pipe 2 in first expansion chambers 111 and portals 21, is filled in the first expansion chambers 111
Sound-absorbing material, sound-absorbing material are glass fiber and felt, and glass fiber and felt are along 1 length direction cross laminates of cylinder point
Cloth.
Air-flow by air inlet pipe 2 enter expansion cavity 11 when, high frequency sound wave by third portal 21 entrance the first expansion chambers 111,
Preliminary noise reduction is carried out by 111 sound-absorbing material of the first expansion chambers；Air-flow subsequently enters third expansion chambers 113, the only intrinsic frequency of through-hole 8
The sound wave of a small number of frequencies near rate could reach the second expansion chambers 112 by through-hole 8, and in addition the sound wave of a small number of frequencies is not then
It can only can constantly be reflected in third expansion chambers 113 by filter opening 16, until air-flow momentum disappears, complete secondary noise reduction；It is located at
Air-flow in second expansion chambers 112 enters third resonant cavity 14 by hush pipe 4, and when by hush pipe 4, sound wave passes through first
41 sleeve 5 into outside that portals carries out noise reduction three times；And the gas entered in third resonant cavity 14 then passes through third resonant cavity 14
Hollow inner wall complete four noise reductions so that the sound wave of various frequencies is reflected in each layer resonance region 7, absorbed；Third is total
Vibration chamber 14 is then discharged by escape pipe 3, and before discharge, fraction portals by second and 31 enters the second resonant cavity 13,
Five noise reductions are completed in the second resonant cavity 13.
Embodiment 2: as shown in figure 3, difference from Example 1 is, the internal diameter of hush pipe 4 from both ends to it is intermediate gradually
Increase, forms drum organization.
Partition 15, which divides, is located at the first expansion chambers 111 and second for stationary barrier 15A and float partition 15B, stationary barrier 15A
Between expansion chambers 112 and be fixed in expansion cavity 11, float partition 15B be located at the second expansion chambers 112 and third expansion chambers 113 it
Between, float partition 15B is sleeved in air inlet pipe 2, be provided within the second expansion chambers 112 push float partition 15B to far from every
The mobile dynamic clamping head and quiet clamping head 17 in 15 direction of plate, dynamic clamping head and quiet clamping head 17 are spring.
Claims (9)
1. a kind of exhaust pipe of high-efficient noise-reducing sound, including cylinder (1), air inlet pipe (2), escape pipe (3) and hush pipe (4), special
Sign is: expansion cavity (11), the first resonant cavity (12), the second resonant cavity (13) and third resonance are provided in the cylinder (1)
Chamber (14), the air inlet pipe (2) are connected to expansion cavity (11), and the escape pipe (3) is connected to third resonant cavity (14), described to disappear
Sound tube (4) setting is in first resonant cavity (12), and both ends are respectively communicated in expansion cavity (11) and third resonant cavity (14),
First, which is provided with, on the hush pipe (4) portals (41)；A part of the escape pipe (3) is stretched to by third resonant cavity (14)
In second resonant cavity (13), and the part is provided with second and portals (31), and another part passes through third by the second resonant cavity (13)
On the outside of resonant cavity (14) to cylinder (1).
2. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 1, it is characterised in that: outside the hush pipe (4)
Side is socketed with sleeve (5), and deadener is filled between the outer wall of the hush pipe (4) and the inner wall of sleeve (5).
3. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 1, it is characterised in that: the hush pipe (4) it is interior
Diameter is gradually increased from both ends to centre, forms drum organization.
4. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 1, it is characterised in that: the third resonant cavity (14)
Inner wall be hollow structure, and be separated into multilayer resonance region (7) by inside panel (6), be provided with and be used on the inside panel (6)
It is connected to the through-hole (61) of third resonant cavity (14) and resonance region (7).
5. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 4, it is characterised in that: the inside panel positioned inside
(6) aperture of the through-hole (61) on is greater than the aperture of the through-hole (61) on the inside panel (6) in outside.
6. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 4, it is characterised in that: the position of the inside panel (6)
In being provided with the protrusion (62) for protruding from plate face in the plate face in resonance region (7), the plate that is located between two neighboring raised (62)
Sound-absorbing blind hole (63) are provided on face.
7. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 1, it is characterised in that: the expansion cavity (11) passes through
Partition (15) is separated into multiple expansion chambers, including the first expansion chambers (111), the second expansion chambers (112) and third being arranged successively
Expansion chambers (113) are connected between two neighboring expansion chambers by filter opening (16), and the air inlet pipe (2) passes through the first expansion chambers
(111) and after the second expansion chambers (112) it protrudes into third expansion chambers (113), one end of the hush pipe (4) is connected to the second expansion
It opens room (112).
8. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 7, it is characterised in that: be located at first expansion chambers
(111) third is provided in the air inlet pipe (2) in portal (21), and sound-absorbing material is filled in first expansion chambers (111).
9. a kind of exhaust pipe of high-efficient noise-reducing sound according to claim 7, it is characterised in that: the partition (15) is divided into solid
Determine dividing plate (15A) and float partition (15B), the stationary barrier (15A) are located at the first expansion chambers (111) and the second expansion chambers
(112) it between and is fixed in expansion cavity (11), the float partition (15B) is located at the second expansion chambers (112) and third is expanded
Between room (113), the float partition (15B) is sleeved on air inlet pipe (2), is provided within second expansion chambers (112)
Push float partition (15B) to the dynamic clamping head and quiet clamping head (17) mobile far from partition (15) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552489.6A CN110230532A (en) | 2019-06-25 | 2019-06-25 | A kind of exhaust pipe of high-efficient noise-reducing sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552489.6A CN110230532A (en) | 2019-06-25 | 2019-06-25 | A kind of exhaust pipe of high-efficient noise-reducing sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110230532A true CN110230532A (en) | 2019-09-13 |
Family
ID=67857272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910552489.6A Pending CN110230532A (en) | 2019-06-25 | 2019-06-25 | A kind of exhaust pipe of high-efficient noise-reducing sound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110230532A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645078A (en) * | 2019-10-21 | 2020-01-03 | 盐城工业职业技术学院 | Automobile energy comprehensive recycling system and working method thereof |
| CN112283809A (en) * | 2020-10-30 | 2021-01-29 | 青岛海信日立空调系统有限公司 | Outdoor air conditioner |
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|---|---|---|---|---|
| CN2830654Y (en) * | 2005-10-31 | 2006-10-25 | 陈恳 | Silencer of impedance combined single-cylinder small general gasoline engine |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| KR20090049201A (en) * | 2007-11-13 | 2009-05-18 | 기아자동차주식회사 | Muffler for vehicle |
| CN102889115A (en) * | 2012-10-12 | 2013-01-23 | 徐工集团工程机械股份有限公司科技分公司 | Internal combustion engine silencer and internal combustion engine |
| CN205349476U (en) * | 2016-01-06 | 2016-06-29 | 万宏光 | Diesel engine noise eliminator |
| CN206513417U (en) * | 2017-02-24 | 2017-09-22 | 浙江春风动力股份有限公司 | A kind of motorcycle and its muffler |
| CN208089373U (en) * | 2018-03-09 | 2018-11-13 | 湖南永义物流有限公司 | A kind of eco-friendly car noise absorber |
| CN210343465U (en) * | 2019-06-25 | 2020-04-17 | 湖州新兴汽车部件有限公司 | High-efficient blast pipe of noise that falls |
-
2019
- 2019-06-25 CN CN201910552489.6A patent/CN110230532A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2830654Y (en) * | 2005-10-31 | 2006-10-25 | 陈恳 | Silencer of impedance combined single-cylinder small general gasoline engine |
| KR20090049201A (en) * | 2007-11-13 | 2009-05-18 | 기아자동차주식회사 | Muffler for vehicle |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| CN102889115A (en) * | 2012-10-12 | 2013-01-23 | 徐工集团工程机械股份有限公司科技分公司 | Internal combustion engine silencer and internal combustion engine |
| CN205349476U (en) * | 2016-01-06 | 2016-06-29 | 万宏光 | Diesel engine noise eliminator |
| CN206513417U (en) * | 2017-02-24 | 2017-09-22 | 浙江春风动力股份有限公司 | A kind of motorcycle and its muffler |
| CN208089373U (en) * | 2018-03-09 | 2018-11-13 | 湖南永义物流有限公司 | A kind of eco-friendly car noise absorber |
| CN210343465U (en) * | 2019-06-25 | 2020-04-17 | 湖州新兴汽车部件有限公司 | High-efficient blast pipe of noise that falls |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645078A (en) * | 2019-10-21 | 2020-01-03 | 盐城工业职业技术学院 | Automobile energy comprehensive recycling system and working method thereof |
| CN110645078B (en) * | 2019-10-21 | 2020-10-13 | 盐城工业职业技术学院 | Automobile energy comprehensive recycling system and working method thereof |
| CN112283809A (en) * | 2020-10-30 | 2021-01-29 | 青岛海信日立空调系统有限公司 | Outdoor air conditioner |
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