CN113483188A - Silencing device for vehicle air conditioner drain pipe and vehicle provided with same - Google Patents
Silencing device for vehicle air conditioner drain pipe and vehicle provided with same Download PDFInfo
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- CN113483188A CN113483188A CN202110735356.XA CN202110735356A CN113483188A CN 113483188 A CN113483188 A CN 113483188A CN 202110735356 A CN202110735356 A CN 202110735356A CN 113483188 A CN113483188 A CN 113483188A
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- drain pipe
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- 230000030279 gene silencing Effects 0.000 title claims abstract description 96
- 230000003584 silencer Effects 0.000 claims abstract description 17
- 238000004378 air conditioning Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims description 14
- 238000007664 blowing Methods 0.000 abstract description 7
- 238000001228 spectrum Methods 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H2001/006—Noise reduction
Abstract
The invention provides a silencing device for a vehicle air conditioner drain pipe and a vehicle provided with the same, and particularly relates to the field of vehicle air conditioning equipment, wherein the silencing device for the vehicle air conditioner drain pipe comprises: a silencing body and a connecting pipe. The silencing body is internally provided with a closed silencing cavity; a connecting pipe disposed in the sound-deadening chamber; and two ends of the silencer extend out of the silencer body; the silencing resonant cavities are separated from each other along the extension direction of the connecting pipe by the plurality of partition plates; at least one opening is arranged on the connecting pipe in each silencing resonant cavity, and the opening is opened towards the cavity of the silencing resonant cavity. The silencing device realizes the coupling of the noise of the specific frequency in the silencing resonant cavity and the drain pipe, effectively reduces the prominent peak noise intensity in the noise frequency spectrum, and eliminates the noise similar to blowing sound when a vehicle is accelerated.
Description
Technical Field
The invention relates to the field of vehicle air conditioning equipment, in particular to a silencing device for a vehicle air conditioning drain pipe and a vehicle provided with the silencing device.
Background
With the improvement of living standard of people, the requirement of consumers on the riding comfort of automobiles is higher and higher, and especially the requirement on the NVH (Noise, Vibration, Harshness) characteristic of automobiles is higher. Automobile noise has become an important environmental pollution source, which not only affects the riding environment of drivers and passengers, but also causes serious pollution to the surrounding environment of the vehicle. Among car noises, a person is concerned about an in-car noise in a car. Excessive noise in the vehicle can seriously affect the riding comfort and safety of the vehicle, the recognition capability of a person on various signals in the vehicle, the psychological state of the person and the like. Therefore, the noise in the vehicle is strictly selected by the user as one of important indicators of the riding comfort of the vehicle. The reduction of the noise level in the vehicle has become a common concern for governments and vehicle manufacturers.
In the field of vehicles, automobile air conditioning systems are popularized in most enterprises, and in the using process, different modes are opened and different air door modes are used for switching to meet the adaptive requirements of people in the automobile on temperature. When the space in the vehicle is communicated with the outside of the vehicle through a path of an air conditioner air door grille, an air conditioner main unit internal cavity, an air conditioner main unit drain pipe arranged in a middle passage and an exhaust pipe near the middle passage in a certain mode (such as defrosting-internal circulation-coldest and the like), radiation noise generated by the exhaust of the vehicle is transmitted to the inside of the vehicle through the path. In the acceleration process of a vehicle, the airflow sound of exhaust can be amplified in the cavity of the air conditioner main machine, the noise is transmitted into the vehicle and is sensed by passengers, and the harmful noise seriously influences the driving and riding experience of a user. Therefore, it is highly desirable to develop a silencer device for a vehicle air conditioner drain pipe, which can reduce the peak noise intensity of several frequency bands in the blowing noise to eliminate the blowing noise-like noise occurring when the vehicle is accelerated.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a silencing device for an air conditioner drain pipe of a vehicle, which is configured to reduce the intensity of a prominent peak noise in a noise spectrum by a test analysis of an air conditioning system, so as to solve the technical problem of a blowing noise-like noise in the vehicle during acceleration of the vehicle.
To achieve the above and other related objects, the present invention provides a muffler device for a vehicle air conditioner drain pipe, comprising: connecting pipe and amortization body.
Wherein, the silencing body is internally provided with a closed silencing cavity; the connecting pipe is arranged in the silencing cavity, and two ends of the connecting pipe extend out of the silencing body; the silencing resonant cavities are separated from each other along the extension direction of the connecting pipe by the plurality of partition plates; at least one opening is arranged on the connecting pipe in each silencing resonant cavity, and the opening is opened towards the cavity of the silencing resonant cavity.
In an embodiment of the silencer device of the present invention, the connecting pipe includes a first pipe and a second pipe disposed opposite to each other, and a third pipe connecting the first pipe and the second pipe.
In an embodiment of the silencer device of the present invention, two ends of the third pipe are respectively connected to the first pipe and the second pipe smoothly through arc elbows.
In an embodiment of the silencing apparatus of the present invention, the silencing body includes a housing and a cover, the plurality of partition plates are disposed in the housing, and the cover is detachably mounted on the housing.
In an embodiment of the silencer device of the present invention, the housing and the plurality of partition plates are provided with through holes, and one end of the connecting pipe sequentially passes through the through holes and extends out of the housing.
In an embodiment of the noise reduction apparatus of the present invention, the plurality of noise reduction resonant cavities respectively reduce noise for noises with different frequencies.
In an embodiment of the silencing device of the present invention, the noise reduction frequency of the plurality of silencing resonance cavities is in the range of 2000 to 4500 Hz.
In an embodiment of the silencing apparatus of the present invention, an opening cross-sectional area S of each of the connecting pipes in the silencing resonant cavitycThe volume V of the sound attenuation resonant cavity and the length l of the connecting pipe in the sound attenuation resonant cavitycAnd the central wavelength f of the noise to be reduced of the silencing resonant cavity.
In an embodiment of the silencing apparatus of the present invention, the cross-sectional area of the opening of the connecting pipe in the silencing resonant cavity is
Where c is the speed of sound.
The invention also provides a vehicle, wherein the silencing device in any embodiment is arranged on a drainage pipeline of an air conditioning system in the vehicle.
In summary, the silencing device for the vehicle air conditioner drain pipe of the invention is characterized in that a closed silencing cavity is arranged outside a connecting pipe for connecting the upper opening and the lower opening of the drain pipe, the inner part of the silencing cavity is divided into a plurality of silencing resonant cavities by a plurality of partition plates along the extension direction of the connecting pipe, the connecting pipes with proper lengths and openings with different sizes and shapes are arranged in the cavities with different volumes, so that the coupling of the silencing resonant cavities and the noise with specific frequency in the drain pipe is realized, the silencing resonant cavities can absorb the noise energy with specific frequency in the drain pipe, the prominent peak noise intensity in the noise spectrum is reduced, and the noise similar to blowing noise generated when the vehicle is accelerated is eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of a muffler device for a vehicle air conditioner drain pipe according to the present invention;
FIG. 2 is a schematic view of the interior of a muffler device for a vehicle air conditioner drain pipe according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a cae (computer Aided engineering) analysis of the muffler device for a vehicle air conditioner drain pipe according to an embodiment of the present invention.
Fig. 4 is a NVH (Noise, Vibration, Harshness) test analysis chart of a whole vehicle before and after modification by a silencer according to an embodiment of the present invention, wherein a curve 5 shows Noise intensity of different frequencies in the whole vehicle before modification by the silencer, and a curve 6 shows Noise intensity of different frequencies in the whole vehicle after modification by the silencer.
Description of the element reference numerals
1. A sound deadening body; 11. a sound-deadening chamber; 12. a housing; 13. a partition plate; 14. a cover body; 2. a connecting pipe; 21. a first pipe body; 22. a second tube body; 23. a third tube; 24. an opening; 3. a water inlet of the water drainage pipe; 4. a drainage pipe drainage port; 5. improving the noise intensity curve in the vehicle before the improvement; 6. and improving the intensity curve of the noise in the vehicle.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the description of the present invention, and any methods, apparatuses, and materials similar or equivalent to those described in the examples of the present invention may be used to practice the present invention.
Referring to fig. 1 to 4, the objective of the present invention is to provide a silencer for a vehicle air conditioner drain pipe, which is to provide a plurality of silencing elements to reduce the peak noise intensity in the noise spectrum for the acceleration noise spectrum of the entire vehicle through the test analysis of the vehicle and the vehicle air conditioner drain pipe, so as to solve the technical problem of the noise similar to the blowing noise in the vehicle during the acceleration process of the vehicle.
Referring to fig. 1 and 2, fig. 1 is a schematic view illustrating an overall structure of a muffler device for a drain pipe of an air conditioner of a vehicle according to the present invention; FIG. 2 is a schematic view showing the internal structure of the muffler device for an air conditioner drain pipe of a vehicle according to the present invention; the silencer for the vehicle air conditioner drain pipe is arranged on a drain pipe of a vehicle air conditioner system, is used for absorbing noise existing in the drain pipe and avoiding the noise from being conducted into a vehicle through the drain pipe, and can comprise a silencer body 1 and a connecting pipe 2. Be provided with inclosed amortization chamber 11 in the above-mentioned amortization body 1, connecting pipe 2 sets up in amortization chamber 11, and the both ends of connecting pipe 2 stretch out to the amortization body 1 outside and connect respectively on mouth of a river 3 and the drain pipe is lower on mouth of a river 4. Wherein, be provided with a plurality of baffles 13 in the above-mentioned amortization chamber 11, above-mentioned a plurality of baffles 13 set up along the extending direction of connecting pipe 2 in amortization chamber 11 and divide into a plurality of amortization resonant cavities with amortization chamber 11, and above-mentioned a plurality of amortization resonant cavities are sealed chamber and independent each other, and the body of above-mentioned connecting pipe 2 in amortization chamber 11 is then passed above-mentioned a plurality of baffles 13 so that the connecting pipe passes through every amortization resonant cavity in amortization body 1. At least one opening 24 is provided in the connecting pipe 2 in each of the muffling resonators, and the opening 24 is opened toward the cavity of the muffling resonator. Therefore, each silencing resonant cavity can effectively interact with the gas in the connecting pipe 2 through the opening 24, the noise vibration close to the natural frequency of the silencing resonant cavity in the connecting pipe 2 is absorbed, and the noise intensity transmitted into a vehicle by the drain pipe is eliminated.
As shown in fig. 1 and 2, in an embodiment of the present invention, the connecting tube 2 includes a first tube 21, a second tube 22 and a third tube 23. Wherein first body 21 and second body 22 set up relatively, and first body 21 and second body 22 set up respectively in the both sides of amortization chamber 11, and the one end of first body 21 and second body 22 stretches out outside amortization body 1, and the other end of first body 21 and second body 22 then passes through third body 23 interconnect.
As shown in fig. 1 and 2, in the present embodiment, the connecting pipe 2 may be a pipe body similar to a U shape, wherein the first pipe body 21 and the second pipe body 22 are two ends of the U-shaped pipe, respectively, and two ends of the third pipe body 23 are smoothly connected to the first pipe body 21 and the second pipe body 22 through a circular arc bent pipe. The arrangement mode of the connecting pipe 2 similar to a U-shaped pipe can effectively increase the length of the connecting pipe 2 in the silencing cavity 11, so that the silencing cavity 11 is separated into silencing resonant cavities with more natural frequencies along the extension direction of the connecting pipe 2 in the silencing cavity 11 through the partition plate 13, and the frequency domain range of noise reduction of the silencing device is expanded.
As shown in fig. 1, in an embodiment of the present invention, the muffler body 1 includes a housing 12 and a cover 14, the housing 12 may be a square housing, the plurality of partition plates 13 are disposed in the housing 12, and the cover 14 is detachably mounted on the housing 12 to facilitate cleaning of the interior of the muffler chamber 11. In this embodiment, a waterproof rubber pad is further disposed on the outer edge of the cover 14, and the waterproof rubber pad can seal a gap between the outer edge of the cover 14 mounted on the housing 12 and the housing 12, so as to ensure the tightness of the internal sound-deadening chamber 11 when the cover 14 is mounted on the housing 12.
As shown in fig. 1 and 2, in the present embodiment, through holes are provided in the housing 12 and the plurality of partition plates 13 in the housing 12, and one end of the connection pipe 2 sequentially passes through the holes and extends out of the housing 12.
As can be seen from the above, the silencing apparatus for the vehicle air conditioner drain pipe of the present invention arranges a plurality of sealed independent silencing resonant cavities in the sealed silencing cavity 11 of the silencing body 1 and then connects the sealed independent silencing resonant cavities to the drain pipe in series through the connecting pipe 2, so that the noise in the drain pipe can be absorbed by the silencing body 1. The noise reduction resonant cavities are communicated and sealed cavity structures which are added on pipelines of an automobile, when the wavelength of sound waves is much larger than the geometric dimension of the sealed cavities, the sealed cavities can be regarded as a centralized parameter system, and the motion of the sound waves in the sealed container can be ignored. When the gas flow passes through the opening 24 of the connection pipe 2, the gas in the opening 24 reciprocates under the effect of the sound pressure, and has a certain sound quality. When the frequency of the airflow sound wave is close to the natural frequency of the sound attenuation resonant cavity, coupling can be generated. Near the coupling frequency, the air vibration velocity reaches a maximum, where the maximum acoustic energy is dissipated and the maximum noise attenuation is obtained, resulting in a device with a reduced specific frequency.
In the invention, noise reduction and silencing can be carried out aiming at specific frequency f by arranging a silencing resonant cavity with proper parameters in a silencing body 1, wherein the parameters of the silencing resonant cavity comprise a cavity volume V of the silencing resonant cavity and a length l of a connecting pipe 2 in the silencing resonant cavitycAnd the opening sectional area S of the connecting pipe 2 in the sound attenuation resonant cavitycAnd the center frequency of the noise reduced by the silencing resonant cavity is
Where c is the speed of sound.
Therefore, according to the above principle, in an embodiment of the present invention, the silencing apparatus of the present invention may analyze the frequency f of the Noise sound that may affect the riding comfort and safety of the user existing in the vehicle during acceleration according to the real vehicle NVH (Noise, Vibration, Harshness) test result of the entire vehicle, and then set the proper parameter of the silencing resonant cavity for the analyzed Noise frequency f, because the space in the vehicle limits the volume V of the silencing resonant cavity 11 and the silencing resonant cavity in the silencing cavity 11 and the volume V of the connection pipe 2 in the silencing resonant cavitycIs basically determined, when the sectional area S of the opening 24 of the connecting pipe 2 in the silencing resonant cavitycThe volume V of the sound attenuation resonant cavity and the connecting pipe 2 can be arranged in the sound attenuation resonant cavityInner length lcAnd the central wavelength f of the noise to be reduced of the silencing resonant cavity, and the sectional area of the opening of the connecting pipe in the silencing resonant cavity is
Where c is the speed of sound.
Fig. 4 is a NVH (Noise, Vibration, Harshness) test analysis chart of a whole vehicle before and after being modified by the silencer, as shown in fig. 4, wherein a curve 5 in fig. 4 shows the Noise intensity of the whole vehicle at different frequencies in the vehicle before being modified by the silencer, and a curve 6 shows the Noise intensity of the whole vehicle at different frequencies in the vehicle after being modified by the silencer. In an example of this embodiment, the NVH (Noise, Vibration, Harshness) test of the test vehicle detects that the frequency of the Noise existing in the test vehicle during acceleration is in the range of 2000Hz to 4500Hz, wherein the center frequency of the high intensity Noise in the test vehicle is 2100Hz, 2700Hz, 2900Hz, 3500Hz, 3750Hz, and 4250 Hz. Therefore, the silencing device in this example sets a plurality of silencing resonant cavities in the silencing body 1 along the connecting pipe 2 for the high-intensity noise with a plurality of center frequencies, and sets appropriate parameters of the silencing resonant cavities according to the center frequencies which need to be heavily denoised and the spatial layout of the air-conditioning and drainage system in the vehicle, so as to ensure the absorption effect of the silencing resonant cavities on the noise with specific frequency.
For example, in the sound-deadening body 1 of the sound-deadening device in this example, a plurality of sound-deadening resonance cavities of different parameters are provided for the high intensity noise of the center frequency to be reduced. If the silencing body 1 is provided with a silencing resonant cavity, the noise reduction can be carried out on the noise with the center frequency f of 2100Hz, and the volume of the silencing resonant cavity is 7.82cm3The length of the connecting pipe 2 in the sound attenuation resonant cavity and the opening sectional area of the connecting pipe 2 are respectively 1.5cm and 1.76cm2. The size of the noise reduction resonant cavity aiming at the noise of other central frequencies which need to be reduced can be determined according to the noise reduction frequency formula of the noise reduction resonant cavity
Settings are made, and parameters can be set in accordance with the present exampleA muffling resonator that denoises noise at 2100Hz for the center frequency f is similar.
As shown in fig. 3 and 4, fig. 3 is a view illustrating a cae (computer air end engineering) transmission loss analysis of the muffler device for a vehicle air conditioner drain pipe according to the present invention. In the example, after the air conditioning system of the invention is installed on the vehicle, the noise problem in the vehicle is solved, and the noise transmission loss of the vehicle with the frequency of 1900-. As is clear from the results of the NVH (Noise, Vibration, and Harshness) test of the entire vehicle in fig. 4, the Noise suppressor in this example reduces the Noise in a targeted manner for the high-intensity Noise with the center frequencies of 2100Hz, 2700Hz, 2900Hz, 3500Hz, 3750Hz, and 4250Hz existing in the vehicle during acceleration, and it is seen from the Noise peaks of the high-intensity Noise with the center frequencies of 2100Hz, 2700Hz, 2900Hz, 3500Hz, 3750Hz, and 4250Hz after the use of the Noise suppressor in the entire vehicle NVH (Noise, Vibration, and Harshness) test charts before and after the use of the Noise suppressor. Therefore, the silencer for the vehicle air conditioner drain pipe can not only perform integral noise reduction on the noise intensity in a section of frequency range, but also perform key noise reduction on the high-intensity noise peak with specific central frequency.
The invention also provides a vehicle, wherein the silencing device in any embodiment is arranged on a drainage pipeline of an air conditioning system in the vehicle.
In summary, the silencing device for the vehicle air conditioner drain pipe of the invention is characterized in that a closed silencing cavity is arranged outside a connecting pipe for connecting the upper opening and the lower opening of the drain pipe, the inner part of the silencing cavity is divided into a plurality of silencing resonant cavities by a plurality of partition plates along the extension direction of the connecting pipe, the connecting pipes with proper lengths and openings with different sizes and shapes are arranged in the cavities with different volumes, so that the coupling of the silencing resonant cavities and the noise with specific frequency in the drain pipe is realized, the silencing resonant cavities can absorb the noise energy with specific frequency in the drain pipe, the prominent peak noise intensity in the noise spectrum is reduced, and the noise similar to blowing noise generated when the vehicle is accelerated is eliminated.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A silencer device for a vehicle air conditioner drain pipe, comprising:
the silencing body is internally provided with a closed silencing cavity;
the connecting pipe is arranged in the silencing cavity, and two ends of the connecting pipe extend out of the silencing body;
the silencing resonant cavities are separated from each other along the extension direction of the connecting pipe by the plurality of partition plates; at least one opening is arranged on the connecting pipe in each silencing resonant cavity, and the opening is opened towards the cavity of the silencing resonant cavity.
2. The muffling device for a vehicle air conditioning drain of claim 1, wherein the connecting tube comprises a first tube and a second tube disposed opposite to each other, and a third tube connecting the first tube and the second tube.
3. The silencing device for the vehicle air conditioner drain pipe according to claim 2, wherein both ends of the third pipe body are smoothly connected to the first pipe body and the second pipe body by circular arc bent pipes, respectively.
4. The muffling device for a vehicle air conditioning drain pipe of claim 1, wherein the muffling body comprises a housing and a cover, the plurality of baffles being disposed within the housing, the cover being detachably mounted to the housing.
5. The muffling device for a vehicle air-conditioning drain pipe according to claim 4, wherein a through hole is formed in the housing and the plurality of partition plates, and one end of the connecting pipe sequentially passes through the through hole and extends out of the housing.
6. The muffling device for a vehicle air-conditioning drain pipe according to claim 1, wherein the plurality of muffling resonant cavities respectively reduce noise for different frequencies.
7. The muffling device for a vehicle air conditioning drain of claim 1, wherein the plurality of sound-muffling resonators have a noise reduction frequency in the range of 2000 to 4500 Hz.
8. The silencing apparatus for drain pipe of air conditioner for vehicle as claimed in claim 1, wherein each of the silencing resonance chambers has an opening sectional area S of the connection pipe thereincThe volume V of the sound attenuation resonant cavity and the length l of the connecting pipe in the sound attenuation resonant cavitycAnd the central wavelength f of the noise to be reduced of the silencing resonant cavity.
9. The silencing apparatus for the drain pipe of air conditioner for vehicle according to claim 8, wherein the opening cross-sectional area of the connection pipe in the silencing resonance chamber is
Where c is the speed of sound.
10. A vehicle characterized in that a muffler device according to any one of claims 1 to 9 is mounted on a drain pipe of an air conditioning system in the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735356.XA CN113483188A (en) | 2021-06-30 | 2021-06-30 | Silencing device for vehicle air conditioner drain pipe and vehicle provided with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735356.XA CN113483188A (en) | 2021-06-30 | 2021-06-30 | Silencing device for vehicle air conditioner drain pipe and vehicle provided with same |
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| Publication Number | Publication Date |
|---|---|
| CN113483188A true CN113483188A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110735356.XA Pending CN113483188A (en) | 2021-06-30 | 2021-06-30 | Silencing device for vehicle air conditioner drain pipe and vehicle provided with same |
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| CN211976253U (en) * | 2020-02-29 | 2020-11-20 | 苏州豹驰声学科技有限公司 | Silencer for high-pressure steam car washing gun |
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2021
- 2021-06-30 CN CN202110735356.XA patent/CN113483188A/en active Pending
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|---|---|---|---|---|
| JPH01169195A (en) * | 1987-12-24 | 1989-07-04 | Fujitsu Ltd | Silencer |
| US20030085071A1 (en) * | 2001-09-07 | 2003-05-08 | David Boast | Noise and vibration suppressors |
| CN101101010A (en) * | 2006-07-05 | 2008-01-09 | 日产自动车株式会社 | Duct structure |
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| CN105697102A (en) * | 2014-12-10 | 2016-06-22 | 福特全球技术公司 | combination exhaust gas heat exchanger/noise reduction member |
| CN205478016U (en) * | 2016-01-13 | 2016-08-17 | 北京汽车研究总院有限公司 | Built -in whistle box structure and car |
| CN207420682U (en) * | 2017-11-16 | 2018-05-29 | 江苏常发农业装备股份有限公司 | A kind of muffler |
| CN211976253U (en) * | 2020-02-29 | 2020-11-20 | 苏州豹驰声学科技有限公司 | Silencer for high-pressure steam car washing gun |
| CN211821265U (en) * | 2020-03-18 | 2020-10-30 | 无锡万里实业集团有限公司 | Silencer for train mop pool |
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