CN212538242U - Silencer and fresh air system with same - Google Patents
Silencer and fresh air system with same Download PDFInfo
- Publication number
- CN212538242U CN212538242U CN202020652153.5U CN202020652153U CN212538242U CN 212538242 U CN212538242 U CN 212538242U CN 202020652153 U CN202020652153 U CN 202020652153U CN 212538242 U CN212538242 U CN 212538242U
- Authority
- CN
- China
- Prior art keywords
- pipe
- pipe body
- silencer
- muffler
- section
- 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.)
- Withdrawn - After Issue
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 45
- 238000005192 partition Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 23
- 230000008030 elimination Effects 0.000 abstract description 23
- 238000003379 elimination reaction Methods 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 14
- 230000007547 defect Effects 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 9
- 230000030279 gene silencing Effects 0.000 description 7
- 230000001743 silencing effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model relates to a silencer technical field specifically provides a silencer and have new trend system of this silencer, aims at solving the tuber pipe configuration single cavity microperforated pipe silencer of current new trend system, and the noise cancelling effect remains the problem of further improvement. Mesh for this purpose, the utility model provides a silencer, including first body, first body includes the first pipeline section that sets gradually along its axial, second pipeline section and third pipeline section, the micropore has on the pipe wall of second pipeline section, the outside cover of second pipeline section is equipped with the second body, be connected through the board of cyclic annular structure between the both ends of second body and the both ends of second pipeline section, it has at least one baffle so that form a plurality of cavities to distribute along the axial between second body and the second pipeline section, at least partly axial size along the second body in a plurality of cavities is different. Therefore, the defect of weak noise elimination capability in a wave valley region in a transmission loss curve is eliminated to a certain extent, and the noise elimination capability of the silencer is improved.
Description
Technical Field
The utility model relates to a silencer technical field specifically provides a silencer and have new trend system of this silencer.
Background
The fresh air system comprises a fresh air fan and an air pipe which is connected with the indoor and the outdoor, outdoor fresh air is guided into the indoor by means of the power of the fresh air fan, and indoor dirty air is discharged to the outdoor, so that the indoor air is ventilated to adjust the quality of the indoor air. However, in the working process of the fresh air system, the air flows in the air pipe to generate noise, so that the life and the work of a user are adversely affected, and the user experience is poor.
In order to reduce the influence of noise on users, a conventional micro-perforated pipe silencer is arranged in a pipeline of the fresh air system and used for eliminating the noise generated by the air flowing in the air pipe. FIG. 1 is a schematic diagram of a single chamber microperforated pipe muffler configuration. As shown in fig. 1, the muffler for the single-chamber micro-perforated pipe comprises a first pipe body 1, wherein the first pipe body 1 comprises a first pipe section 11, a second pipe section 12 and a third pipe section 13 which are arranged along the axial direction of the first pipe section, micropores 14 are formed in the pipe wall of the second pipe section 12, a second pipe body 2 is sleeved outside the second pipe section 12, two ends of the second pipe body 2 are connected with two ends of the second pipe section 2 through annular plates 3, and an expansion cavity is formed between the second pipe section 12 and the second pipe body 2. The left end and the right end of the first pipe body 1 are respectively an air inlet 15 and an air outlet 16. The micropores refer to pores having a pore diameter of 0.5 to 1 mm. In use, air enters the first tubular body 1 through the air inlet 15, flows through the first, second and third tubular sections 11, 12, 13 in sequence, and finally flows out through the air outlet 16. When the air flow flows in the silencer of the micro-perforated pipe, the noise energy is gradually attenuated, and the noise is eliminated to a certain extent. Fig. 2 is a schematic view showing a transmission loss curve of a single-chamber microperforated pipe muffler, and as shown in fig. 2, the amount of sound attenuation fluctuates in a wave-like manner with an increase in frequency in the transmission loss curve of the single-chamber microperforated pipe muffler. It can be seen that, in the transmission loss curve, the single-chamber micro-perforated pipe silencer has the largest noise elimination amount for the noise with the frequency corresponding to the wave crest, and the single-chamber micro-perforated pipe silencer has the smallest noise elimination amount for the noise with the frequency corresponding to the wave trough. Therefore, the air treated by the single-chamber micro-perforated pipe silencer has most of the noise of the frequency eliminated basically, and the noise of the other frequency is not eliminated, and the silencing effect is further improved.
Accordingly, there is a need in the art for a new muffler that addresses the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems in the prior art, i.e. to solve the problem that the noise elimination effect of the muffler of the air duct with a single-chamber micro-perforated pipe in the existing fresh air system is yet to be further improved, an aspect of the present invention provides a muffler, which comprises a first pipe body including a first pipe section, a second pipe section and a third pipe section sequentially arranged along an axial direction thereof, wherein a pipe wall of the second pipe section has micro-holes, and a second pipe body is sleeved outside the second pipe section, a plate of an annular structure is arranged between two ends of the second pipe body and two ends of the second pipe section to connect the two, wherein at least one partition plate parallel to the plate of the annular structure is axially distributed between the second pipe body and the second pipe section so as to form a plurality of chambers between the first pipe body and the second pipe body, and at least a portion of the plurality of chambers differ in size in an axial direction of the second tube.
In a preferred embodiment of the above muffler, a dimension of the cavity in the axial direction of the second pipe body is not smaller than a dimension of the cavity in the radial direction of the second pipe body.
In the preferable technical scheme of the above muffler, the first pipe body and the second pipe body are equal-diameter pipes, and the first pipe body and the second pipe body are coaxially arranged.
In a preferred embodiment of the above muffler, the sizes of the plurality of chambers satisfy a condition shown by the following formula (1):
c/(4Li)＝c/(4L1)+(i-1)c/(2nL1)，i＝2，3，…，n (1)
in formula (1), n is the number of the chambers, c is the speed of sound, L1 is the dimension of the 1 st chamber in the axial direction of the second pipe body, and Li is the dimension of the ith chamber in the axial direction of the second pipe body.
In a preferred embodiment of the above muffler, the sizes of the plurality of chambers further satisfy a condition shown by the following equation (2):
c/(4L1)≤fmin (2)
in the formula (2), fminIs the minimum frequency value in the target muffling frequency range.
In a preferred embodiment of the muffler, the first pipe body is a constant diameter pipe having a circular cross section, and the size of the plurality of chambers further satisfies a condition shown by the following formula (3):
3c/(4L1)≤1.85c/D1 (3)
in the formula (3), D1Is the diameter of the first tube.
In a preferred embodiment of the above muffler, the second pipe body is a constant diameter pipe having a circular cross section, and the sizes of the first pipe body and the second pipe body satisfy a condition shown by the following formula (4):
0.25≤(D2-D1)/2D1≤1.2 (4)
in the formula (4), D2Is the diameter of the second tube.
In a preferred embodiment of the above muffler, the number of the chambers is 3 to 5.
The technical scheme of the utility model can understand, in the utility model discloses an among the technical scheme, the silencer includes first body, first body includes the first pipeline section that sets gradually along its axial, second pipeline section and third pipeline section, the micropore has on the pipe wall of second pipeline section, and the outside cover of second pipeline section is equipped with the second body, thereby be provided with the board of annular structure between the both ends of second body and the both ends of second pipeline section and connect the two, it has at least one baffle parallel with the board of annular structure to distribute along the axial between second body and the second pipeline section, so that form a plurality of cavities between first body and second body, at least partly axial size along the second body in a plurality of cavities is different. Through such setting, form the cavity of a plurality of different length between first body and the second body, the cavity of different length has different transmission loss curve, and the transmission loss curve of different length cavity superposes each other, and the defect that the noise-damping capacity that the valley region exists is weak in the transmission loss curve has been eliminated to a certain extent, has promoted the noise-damping capacity of silencer, has improved the noise-damping effect of silencer.
Preferably, the dimension of the chamber in the axial direction of the second tube is not smaller than the dimension of the chamber in the radial direction of the second tube. That is, the length of the chamber is not less than the depth of the chamber. It should be noted that the dimension of the chamber in the radial direction of the second pipe body refers to the maximum dimension of the chamber between the second pipe section and the second pipe body in the radial direction of the second pipe body. Through the arrangement, the noise elimination quantity of each cavity is ensured, and the noise elimination capacity of the silencer is improved to a great extent. The plurality of cavities can be set to the same depth, so that the muffling amount of noise of each frequency in the muffling frequency range is basically consistent, most muffling requirements can be met, and the manufacture of the muffler is facilitated. It can be understood that, for the case that the volume of the individual frequency noise in the noise is larger in the partial noise elimination requirement, the plurality of chambers may be set to different depths, and for the chamber corresponding to the individual frequency noise with the larger volume, the depth is larger, so as to increase the noise elimination amount of the frequency noise, thereby achieving a better noise elimination effect.
Furthermore, the utility model discloses another aspect provides a new trend system, be provided with above-mentioned arbitrary silencer on the tuber pipe of new trend system. It should be noted that, this new trend system has the whole technological effect of above-mentioned silencer, and no longer repeated here.
In the preferable technical scheme of the fresh air system, a plurality of the mufflers are arranged on an air pipe of the fresh air system, and the mufflers are connected in series or in parallel on the air pipe.
A plurality of silencers are arranged in series, and can carry out multiple silencing on noise generated by air flowing in the air pipe, so that a better silencing effect is achieved. A plurality of silencers are arranged in parallel, the air flow in the air pipe is divided into a plurality of strands and flows through the silencers respectively, the phenomenon that the narrow passage of the silencer influences the flow of the air flow is avoided, the resistance of the air flowing through the silencers is reduced, and the normal work of a fresh air system is ensured.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a single chamber microperforated pipe muffler configuration;
FIG. 2 is a graphical representation of the transmission loss curve for a single chamber microperforated pipe muffler;
fig. 3 is a schematic structural diagram of a muffler according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the comparison of the muffling effect of the muffler and the single-chamber muffler according to an embodiment of the present invention.
List of reference numerals:
1. a first pipe body; 11. a first tube section; 12. a second tube section; 13. a third tube section; 14. micropores; 15. an air inlet; 16. an air outlet; 2. a second tube body; 3. an annular plate; 4. a partition plate; 51. a first chamber; 52. a second chamber; 53. a third chamber.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the number of chambers in the muffler of the present invention is 3, one skilled in the art can adjust the number of chambers as needed to suit a particular application, e.g., the number of chambers in the muffler of the present invention can be 4, 5, 6, etc. Obviously, the technical solution after adjustment still falls into the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "left", "right", "inside", "outside", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In order to solve the air pipe configuration single cavity microperforated pipe silencer of current new trend system, the noise cancelling effect remains the problem of further improvement, the utility model provides a silencer, the silencer includes first body, first body includes the first pipeline section that sets gradually along its axial, second pipeline section and third pipeline section, the micropore has on the pipe wall of second pipeline section, and the outside cover of second pipeline section is equipped with the second body, thereby be provided with the board of loop configuration between the both ends of second body and the both ends of second pipeline section and connect the two, it has at least one baffle parallel to the board of loop configuration to distribute along the axial between second body and the second pipeline section, so that form a plurality of cavities between first body and second body, at least some in a plurality of cavities are different along the axial size of second body. Through such setting, form the cavity of a plurality of different length between first body and the second body, the cavity of different length has different transmission loss curve, and the transmission loss curve of different length cavity superposes each other, and the defect that the noise-damping capacity that the valley region exists is weak in the transmission loss curve has been eliminated to a certain extent, has promoted the noise-damping capacity of silencer, has improved the noise-damping effect of silencer.
Preferably, the dimension of the chamber in the axial direction of the second pipe body is not smaller than the dimension of the chamber in the radial direction of the second pipe body. That is, the length of the chamber is not less than the depth of the chamber. Through the arrangement, the noise elimination quantity of each cavity is ensured, and the noise elimination capacity of the silencer is improved to a great extent. The depth of the plurality of chambers may be the same or different. The plurality of cavities are arranged to have the same depth, so that the muffling amount of noise of each frequency in the muffling frequency range is basically consistent, most muffling requirements can be met, and the manufacture of the muffler is facilitated. For the condition that the volume of individual frequency noise in the noise is large in partial noise elimination requirements, the multiple chambers can be set to different depths, and for the chamber corresponding to the individual frequency noise with large volume, the depth is large, so that the noise elimination amount of the chamber corresponding to the frequency is improved, and a better noise elimination effect is achieved. For example, the first pipe body is an equal-diameter round pipe, the second pipe body is a stepped pipe, and chambers with different depths are formed between different stepped sections of the stepped pipe and the second pipe section.
Preferably, the first pipe body and the second pipe body of the muffler are equal-diameter pipes, and the first pipe body and the second pipe body are coaxially arranged, so that a plurality of annular chambers are formed between the second pipe section and the second pipe body. When the air in the first pipe body flows through the second pipe section, the cavity between the second pipe section and the second pipe body is an annular cavity, and when the air flows through the second pipe section, the air and the gas in the annular cavity generate uniform resonance, so that the noise elimination effect is more stable. In addition, the silencer is simpler and more convenient to manufacture in the arrangement mode, and the manufacturing cost is reduced.
It can be understood that the first tube and the second tube are equal-diameter tubes, the first tube and the second tube are coaxially arranged, the cross-sectional shapes of the first tube and the second tube are the same, such as circular, rectangular, triangular and the like, or the cross-sectional shapes of the first tube and the second tube are different, such as the cross-sectional shape of the first tube is circular, and the cross-sectional shape of the second tube is rectangular or triangular and the like. In addition, the arrangement can be further realized, the first pipe body and the second pipe body are equal-diameter pipes, the cross sections of the first pipe body and the second pipe body are the same in shape, and the first pipe body and the second pipe body are not arranged coaxially.
Preferably, the sizes of the plurality of chambers satisfy a condition shown by the following formula (1):
c/(4Li)＝c/(4Li-1)+c/(2nL1)，i＝2，3，…，n (1)
in the formula (1), n is the number of chambers, c is the sound velocity, and L1The dimension (i.e. length) of the 1 st chamber in the axial direction of the first tube, LiThe dimension (i.e., length) of the ith chamber in the axial direction of the first tube.
It should be noted that the 1 st cavity, the 2 nd cavity, …, and the nth cavity may be disposed at any front and rear positions along the axial direction of the first pipe, and the positions of the cavities do not affect the sound-damping performance of the sound absorber. Generally, for convenience of manufacture, the plurality of chambers are sequentially distributed along the axial direction of the first pipe body in the order of smaller length to larger length.
The lengths of the n chambers are respectively from long to short: l is1、L2…LnThe peak frequency (the corresponding noise frequency value at the peak) in the transmission loss curve is f ═ jc/4Ln(j is 1, 3, 5 …, c is the sound velocity in the use environment, and c is 340m/s at normal temperature and normal pressure). The frequency of the 1 st peak in the transmission loss curve of the 1 st cavity is f11＝c/(4L1) And the frequency of the 2 nd peak in the transmission loss curve of the 1 st cavity is f12＝3c/(4L1) The corresponding frequency difference Δ f ═ f12-f11＝3c/(4L1)-c/(4L1)＝c/(2L1) (ii) a Make the 1 st peak frequency f in the transmission loss curve of the ith cavityi1＝f(11)+ (i-1) Δ f/n, i.e., c/(4L)i)＝c/(4L1)+(i-1)c/(2nL1). Due to the transmission loss curve of the silencer of the single-cavity micro-perforated pipe, the value of the wave crest can be gradually attenuated along with the increase of the frequency, and the attenuation of the value of the first wave crest and the second wave crest is smaller, before takingThe frequency range between the two wave peak frequencies reasonably limits the lengths of the plurality of cavities, and reasonably superposes the transmission loss curves of the plurality of cavities, so that the area with weaker noise elimination capability in the wave trough part is eliminated, and the integral noise elimination effect of the silencer in the effective noise elimination frequency range is improved.
Further preferably, the sizes of the plurality of chambers also satisfy the condition shown by the following formula (2):
c/(4L1)≤fmin (2)
in the formula (2), fminIs the minimum frequency value in the target muffling frequency range.
Through the arrangement, the lengths of the cavities are reasonably arranged, so that the silencing frequency range of the silencer falls in a larger area in the frequency range of superposition of transmission loss curves of the cavities, the silencing quantity of each frequency noise in the silencing frequency range is ensured, and the integral silencing effect is effectively improved.
Preferably, the first tube is a constant diameter tube having a circular cross section, and the plurality of chambers further satisfy the condition shown by the following formula (3):
3c/(4L1)≤1.85c/D1 (3)
in the formula (3), D1Is the diameter of the first tube.
When the channel sectional area (i.e., the sectional area of the first pipe body) of the muffler is large, the high-frequency sound waves directly pass in a beam shape and rarely contact the wall surface of the pipeline, the muffling effect is reduced, the phenomenon is called "high-frequency failure", the frequency at which the muffling amount obviously begins to decrease becomes "upper limit failure frequency", and an empirical calculation formula is as follows: f. ofOn the upper part1.85c/D, where c is the speed of sound (m/s) and D is the equivalent diameter of the channel cross-section (m).
The sizes of the chambers are set to meet the condition shown in the formula (3), so that the phenomenon that the noise elimination amount of individual frequency noise in a high frequency band is too small is avoided, and the noise elimination amount of each frequency in a noise elimination frequency range is ensured.
Preferably, the second pipe body is a constant diameter pipe having a circular cross section, and the sizes of the first pipe body and the second pipe body satisfy a condition shown by the following formula (4):
0.25≤(D2-D1)/2D1≤1.2 (4)
in the formula (4), D2Is the diameter of the second tube.
Through the arrangement, the depth of the cavities is in a more reasonable range, the required noise elimination amount is ensured, the phenomenon that the silencer occupies a larger space due to overlarge size is avoided, and the manufacturing cost of the silencer is reduced.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a muffler according to an embodiment of the present invention, and fig. 4 is a schematic comparison diagram of the muffling effect of the muffler according to an embodiment of the present invention and a single-chamber muffler. As shown in fig. 3, the muffler includes a first pipe 1 with a diameter of 55mm, the first pipe 1 includes a first pipe section 11, a second pipe section 12 and a third pipe section 13 distributed along an axial direction of the first pipe, a micropore 14 is formed on a pipe wall of the second pipe section 12, a second pipe 2 with a diameter of 145mm is sleeved outside the second pipe section 12, two ends of the second pipe 2 are connected with two ends of the second pipe section 12 through annular plates 3, 2 partition plates 4 parallel to the annular plates 3 are distributed along the axial direction between the second pipe 2 and the second pipe section 12, 3 chambers are formed between the first pipe 1 and the second pipe 2, namely, a first chamber 51, a second chamber 52 and a third chamber 53, and lengths of the first chamber 51, the second chamber 52 and the third chamber 53 are 153mm, 91.8mm and 65.6mm respectively. As shown in fig. 4, the transmission loss curve of the muffler is shown, and the transmission loss curve of a single-chamber microperforated pipe muffler having the same overall size as that of the muffler, with only no partition 4 provided to form a plurality of chambers, is also shown. It can be seen that the multi-chamber silencer with the same size has larger overall silencing amount and better silencing effect within the effective silencing frequency range. In use, air enters the first tubular body 1 through the air inlet 15, flows through the first, second and third tubular sections 11, 12, 13 in sequence, and finally flows out through the air outlet 16. When the airflow flows in the silencer, the good silencing effect is achieved under the cooperative silencing effect of the multiple cavities.
It will be understood by those skilled in the art that in the muffler, 2 baffles 4 are disposed between the second pipe section 12 of the first pipe 1 and the second pipe 2, so that three chambers are formed between the second pipe section 12 and the second pipe 2, which is only a specific arrangement, and those skilled in the art can adjust the arrangement as needed to suit the specific application, for example, the number of baffles 4 disposed between the second pipe section 12 and the second pipe 2 may be 1, 3, 4 or more, etc. Preferably, the number of baffles 4 is 2, 3 or 4, so that 3, 4 or 5 chambers are formed between the second pipe section 12 and the second pipe body 2.
Furthermore, the utility model also provides a new trend system, this new trend air conditioner include any one of the above-mentioned embodiment the silencer.
Preferably, a plurality of silencers are arranged on an air pipe of the fresh air system, and the silencers are connected in series or in parallel on the air pipe. For example, in one embodiment, a plurality of mufflers are connected directly end-to-end or indirectly through connecting tubes and then connected in the air duct. In the use process, the air flows through the plurality of silencers in sequence, and the plurality of silencers carry out multiple times of silencing on noise generated by air flowing in the air pipe, so that a better silencing effect is achieved. In another embodiment, the air inlets of the mufflers are converged to an air inlet pipe, the air outlets of the mufflers are converged to an air outlet pipe, and the air inlet pipe and the air outlet pipe are respectively connected to the air pipes. In the use process, the air flow in the air pipe is divided into a plurality of strands from the air inlet pipe, flows through the plurality of silencers respectively, and is collected to the air outlet pipe after being silenced. Through the arrangement, the phenomenon that the flow of air flow is influenced due to the narrow channel of the silencer is avoided, the resistance of the air flowing through the silencer is reduced, and the normal work of a fresh air system is ensured.
Can see through the above description, in the technical scheme of the utility model, set up at least one baffle along the axial between first body and the second body through at single chamber microperforated tube silencer, so as to form the cavity of a plurality of different lengths between first body and second body, the cavity of different length has different transmission loss curves, the transmission loss curve of different length cavities superposes each other, the defect that the noise damping ability that the wave valley region exists is weak in the transmission loss curve has been eliminated to a certain extent, the noise damping ability of silencer has been promoted, the noise cancelling effect of silencer has been improved. The length of the cavity is set to be not less than the depth of the cavity, so that the muffling capacity of each cavity is guaranteed, and the muffling capacity of the muffler is improved to a great extent.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. A silencer is characterized by comprising a first pipe body, wherein the first pipe body comprises a first pipe section, a second pipe section and a third pipe section which are sequentially arranged along the axial direction of the first pipe body,
wherein, the pipe wall of the second pipe section is provided with micropores, the outer side of the second pipe section is sleeved with a second pipe body, a plate with an annular structure is arranged between the two ends of the second pipe body and the two ends of the second pipe section so as to connect the two,
wherein at least one partition plate parallel to the plate of the annular structure is axially distributed between the second pipe body and the second pipe section so as to form a plurality of chambers between the first pipe body and the second pipe body, and
at least a portion of the plurality of chambers differ in size along an axial direction of the second tube.
2. The muffler of claim 1 wherein the dimension of the chamber in the axial direction of the second pipe body is not smaller than the dimension of the chamber in the radial direction of the second pipe body.
3. The muffler of claim 2 wherein the first pipe body and the second pipe body are both equal diameter pipes and the first pipe body is disposed coaxially with the second pipe body.
4. The muffler of claim 2 wherein the size of the plurality of chambers satisfies the condition shown by the following equation (1):
c/(4Li)＝c/(4L1)+(i-1)c/(2nL1)，i＝2，3，…，n (1)
in formula (1), n is the number of chambers, c is the speed of sound, L1Is the dimension of the 1 st chamber along the axial direction of the second tube body, LiIs the dimension of the ith chamber along the axial direction of the second tube body.
5. The muffler of claim 4 wherein the plurality of chambers are also sized to satisfy the condition shown by the following equation (2):
c/(4L1)≤fmin (2)
in the formula (2), fminIs the minimum frequency value in the target muffling frequency range.
6. The muffler of claim 5, wherein the first pipe body is a constant diameter pipe having a circular cross section, and the size of the plurality of chambers further satisfies a condition shown by the following formula (3):
3c/(4L1)≤1.85c/D1 (3)
in the formula (3), D1Is the diameter of the first tube.
7. The muffler of claim 6, wherein the second pipe body is a constant diameter pipe having a circular cross section, and the dimensions of the first pipe body and the second pipe body satisfy a condition shown by the following formula (4):
0.25≤(D2-D1)/2D1≤1.2 (4)
in the formula (4), D2Is the diameter of the second tube.
8. The muffler of claim 7 wherein the number of chambers is 3 to 5.
9. A fresh air system, characterized in that a silencer according to any one of claims 1 to 8 is arranged on an air pipe of the fresh air system.
10. The fresh air system as claimed in claim 9, wherein a plurality of the mufflers are arranged on an air pipe of the fresh air system, and the mufflers are arranged on the air pipe in series or in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020652153.5U CN212538242U (en) | 2020-04-26 | 2020-04-26 | Silencer and fresh air system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020652153.5U CN212538242U (en) | 2020-04-26 | 2020-04-26 | Silencer and fresh air system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212538242U true CN212538242U (en) | 2021-02-12 |
Family
ID=74519270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020652153.5U Withdrawn - After Issue CN212538242U (en) | 2020-04-26 | 2020-04-26 | Silencer and fresh air system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212538242U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503874A (en) * | 2020-04-26 | 2020-08-07 | 青岛海尔空调电子有限公司 | Silencer and fresh air system with same |
-
2020
- 2020-04-26 CN CN202020652153.5U patent/CN212538242U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503874A (en) * | 2020-04-26 | 2020-08-07 | 青岛海尔空调电子有限公司 | Silencer and fresh air system with same |
| CN111503874B (en) * | 2020-04-26 | 2023-03-28 | 青岛海尔空调电子有限公司 | Silencer and fresh air system with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3899067B2 (en) | Vacuum cleaner silencer | |
| CN104948265A (en) | Impedance compound muffler | |
| CN106089362A (en) | A kind of internal combustion engine exhaust silencer | |
| CN212538242U (en) | Silencer and fresh air system with same | |
| CN111503874B (en) | Silencer and fresh air system with same | |
| CN113160785B (en) | Device for reducing air and solid sound transmission | |
| CN211449210U (en) | Resistive-resonant cavity composite muffler | |
| CN210440182U (en) | Suction muffler for refrigeration compressor | |
| CN112879142A (en) | Intelligent noise reduction control system for automobile | |
| CN107816595A (en) | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel | |
| CN210320585U (en) | Silencer and air conditioner | |
| CN207864880U (en) | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel | |
| CN112628517B (en) | Pipeline muffler, device and preparation method | |
| CN212716943U (en) | Air inlet pipe | |
| CN114999431A (en) | Silencer, silencer assembly and refrigerator | |
| CN116221072A (en) | Muffler for compressor and compressor | |
| CN210830985U (en) | Rectangular array silencer for ventilation pipeline | |
| CN210343465U (en) | High-efficient blast pipe of noise that falls | |
| CN211781878U (en) | Air conditioner fan pipeline silencer | |
| CN209993345U (en) | Hybrid silencer and silencing system | |
| CN214307564U (en) | Silencer and air conditioner | |
| CN210977634U (en) | Exhaust silencer with double-air-outlet multi-pipe labyrinth structure | |
| CN216201555U (en) | Reactive muffler | |
| CN212538245U (en) | Microporous plate pipeline silencer | |
| CN210003361U (en) | type silencer for engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211109 Address after: 230601 plant 1, 2 and 3, Haier Innovation Industrial Park, 3456 Shixin Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: HEFEI HAIER AIR CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee before: Haier Smart Home Co., Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210212 Effective date of abandoning: 20230328 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210212 Effective date of abandoning: 20230328 |