CN1233707A - Low resistance and high efficiency silencer - Google Patents
Low resistance and high efficiency silencer Download PDFInfo
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- CN1233707A CN1233707A CN 99106473 CN99106473A CN1233707A CN 1233707 A CN1233707 A CN 1233707A CN 99106473 CN99106473 CN 99106473 CN 99106473 A CN99106473 A CN 99106473A CN 1233707 A CN1233707 A CN 1233707A
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Abstract
A low resistance high efficiency silencer has a barrel type external casing with air inlet and outlet at its two ends, the air outlet tube extends in the casing and expands as tail tube acoustic filtering body case with air holes on its side, sound absorbing core is installed in the acoustic filtering body case, between the internal core and acoustic filtering body case is acoustic filtering exhaust passage. Pulse air flow and noise enter into acoustic filtering exhaust passage from the air hole on the acoustic filtering body case, the sound absorbing internal core absorbs the pulse energy and reduces the noise to radiate toward outside, enhances the anti-noise effect, so that it can expand the exhaust passage, reduces the exhaust resistance of internal combustion engine, increases the filling air quantity and purity of cylinder, gives full play to the efficacy of internal combustion engine.
Description
The present invention relates to a kind of low resistance and high efficiency silencer, particularly a kind of low resistance and high efficiency silencer of I. C. engine exhaust sound-attenuating system.
The effect of exhaust silencer for internal-combustion engine, be combustion gas produces during internal combustion engine pulse very noisy in silencing apparatus, absorbs with eliminate or the reduction noise to the pollution of environment.Silencing apparatus performance evaluation requires: sound deadening capacity many as far as possible (height), the power loss that exhaust resistance causes to internal-combustion engine the least possible (little).Known " the low resistance and high efficiency silencer " (patent No.: ZL96247099.6) mainly be the condition that has increased " altitude temperature difference effect reduction throughput " according to original base, under identical declared working condition, the waste gas mean flowrate that discharge the air outlet reduces 20-30% than original silencing apparatus under the effect of altitude temperature difference effect, so that aeroperformance and noise elimination effect increase.
The silencing apparatus of prior art, it includes cylindrical case, lining, this lining is fixedly connected on the inwall of cylindrical case by supporting slice, in this lining, dividing plate is set, or lining conical lid is set on an end of suction port and by this this end opening of conical lid shutoff, between lining and shell, forming the double wall air-flow path, offering a plurality of pores on this lining perisporium, constituted silencer thus, as since the silencing apparatus volume limited, the mobile eddy current that forms brings out the multifrequency noise to pulse pneumatic in each noise elimination unit, although be best Combination Design, the raising of silencing apparatus performance remains extremely limited, offer pore on the outlet tail piece wall in the body shell, the pneumatic noise that the pore and the mouth of pipe are entered forms phase difference and is cancelled a part, but along with internal-combustion engine rotational speed and load variations, corresponding pore can make pneumatic noise forward times speed meet and impact on the tube wall, bring out high-frequency noise and directly still very big to extraradial noise by steam outlet pipe, make de-noising characteristic variation, still be very limited so engine performance improves.
The object of the invention is to provide a kind of more reasonable structure, noise elimination better effects if, exhaust resistance silencing apparatus littler, that can more give full play to the due usefulness of internal-combustion engine.
In order to realize the purpose of the invention described above, a kind of low resistance and high efficiency silencer of the present invention, it includes cylindrical case, tubular filtration of sound body shell, inner core and conical lid; This cylindrical case has suction port and air outlet; This tubular filtration of sound body shell forms the fusiform cylindrical shell of loudspeaker and constitutes by extending in shell from steam outlet pipe to enlarge, offer a plurality of pores on the sidewall of this filtration of sound body shell, one end of the air inlet side of this filtration of sound body shell is fastened on by supporting slice on the inwall of shell, is forming the double wall air-flow path between filtration of sound body shell and shell; Above-mentioned inner core has and filtration of sound body shell similar shapes, this inner core be in filtration of sound body shell inside, on an end of the air outlet side of this inner core, conical lid is installed, coupled together by the inwall of supporting slice with conical lid and filtration of sound body shell, an end of the air inlet side of this inner core is fastened on the inwall of the conical lid that is connected with filtration of sound body shell.Between filtration of sound body shell inwall and inner core, forming filtration of sound exhaust passageway.This inner core is made of sound absorbing material.
Another kind of low resistance and high efficiency silencer of the present invention, in its cylindrical case, lining is set, this lining is fixedly connected on the inwall of shell by supporting slice, in this lining, in its axial roughly neutral position dividing plate is being set, this dividing plate with this lining inner shaft to being divided into two-part, offering a plurality of pores on the wall of this lining, this lining is fastened on by supporting slice on the inwall of shell, is forming the double wall air-flow path between lining and outer casing inner wall, constitutes the silencer container thus.It is characterized in that, set up tail pipe filtration of sound device in above-mentioned silencer container, this tail pipe filtration of sound device includes filtration of sound body shell, inner core, quieter material, and above-mentioned filtration of sound body shell is to extend expansion and formation from outlet in the partitioned portion of the air outlet side of lining; Between filtration of sound body shell and inner core, forming filtration of sound exhaust passageway.
Another low resistance and high efficiency silencer of the present invention, in its cylindrical case, be provided with lining, this lining is fixedly connected on the shell by supporting slice, on the end relative of this lining, be provided with conical lid integratedly with suction port, and its awl point is towards suction port, offering a plurality of pores on the wall of this lining, between lining outer circumferential face and outer casing inner wall face, forming the double wall air-flow path, constitute the silencer container thus, it is characterized in that, in above-mentioned silencer container, set up tail pipe filtration of sound device, this tail pipe filtration of sound device includes filtration of sound body shell, inner core, quieter material, above-mentioned filtration of sound body shell are arranged on the inside of lining by forming to the inner extension expansion of lining from the air outlet; Between filtration of sound body shell and inner core, forming filtration of sound exhaust passageway.
When being applied to low resistance and high efficiency silencer of the present invention on the internal-combustion engine, the internal combustion engine exhaust, the subsidiary formed very noisy of pulse exhaust flow enter silencing apparatus through noise reduction process such as the inner unhurried currents that expands after, again through on the filtration of sound body shell wall or the pore of inner core enter filtration of sound exhaust passageway, noise is weakened by the sound absorbing material absorption in the filtration of sound exhaust passageway of filtration of sound device, waste gas is discharged after the pooling by filtration of sound exhaust passageway, avoids noise directly to external radiation.And, the subsidiary formed noise of pulsing airflow enters filtration of sound exhaust passageway from the pore of filtration of sound body shell or inner core wall surrounding, because any wall has reticular fibre sound absorbing material pulsed energy and noise to play the buffering absorption in the filtration of sound exhaust passageway, the sound uncle does not continue reflection effect in filtration of sound exhaust passageway, the chance that does not have mutual forward impact has simultaneously reduced the formation of regenerated noise; The total actual internal area of offering on the filtration of sound body shell wall of pore is greater than steam outlet pipe, make air-flow and incidental noise be divided into multiple spot from become the horizontal pore of 90 degree with filtration of sound row sound passageway axis slowly by entering filtration of sound exhaust passageway, and each section pore is different with the mouth of pipe distance of giving vent to anger, pulse energy harmony wave direction is propagated generation time poor (phase difference) outward and is weakened, and the pulse crest and the exhaust sound of air-flow are cut down significantly.Thereby the actual internal area of using inner all air-flow paths of gas tube orifice and silencing apparatus all can increase to quite or greater than the air inlet mouth of pipe (internal-combustion engine vent-pipe), the noise elimination effect still is better than original or known silencing apparatus, and the silencing apparatus overall performance is further improved.
The present invention is further described below in conjunction with meeting figure and embodiment.
Fig. 1 is the structure sectional view of the low resistance and high efficiency silencer of the first embodiment of the present invention.
Fig. 2 is the structure sectional view of the low resistance and high efficiency silencer of the second embodiment of the present invention.
Fig. 3 is the structure sectional view of the low resistance and high efficiency silencer of the third embodiment of the present invention.
Fig. 4 is the structure sectional view of the low resistance and high efficiency silencer of the fourth embodiment of the present invention.
Fig. 5 is the structure sectional view of the low resistance and high efficiency silencer of the fifth embodiment of the present invention.
Fig. 6 is the structure sectional view of the low resistance and high efficiency silencer of the sixth embodiment of the present invention.
What Fig. 1 represented is the first embodiment of the present invention, and this silencing apparatus includes: the cylindrical case 2 with suction port 1 and air outlet 10; Be fastened on tubular filtration of sound body shell 8 on shell 2 inwalls with supporting slice 3 towards an end of suction port 1; Be arranged on the inner core 7 of filtration of sound body shell 8 inside with one heart; Above-mentioned filtration of sound body shell 8 offers a plurality of pores 4 by extending in shell 2 from steam outlet pipe 10 and expanding into the loudspeaker streamline, then formed by conical lid 9 shutoff to the end that suction port direction tubular extends and it is relative with suction port 1 on the periphery wall of this filtration of sound body shell 8; Between filtration of sound body shell 8 and shell 2, forming the double wall air-flow path, above-mentioned inner core 7 is made of quieter material 6, its profile is similar to filtration of sound filtration of sound body shell, an end relative with suction port 1 of this inner core 7 is connected with the conical lid 9 of filtration of sound body shell 8, it is equipped with conical lid 9 on an end of air outlet 10, this end is connected conical lid 9 by support plate 3 and is fixedly connected on the inwall of filtration of sound shell 8 with filtration of sound body shell 8.Between inner core 7 outer circumferential faces and filtration of sound body shell 8 internal faces, forming filtration of sound exhaust passageway 5.
That Fig. 2 represents is another embodiment of low resistance and high efficiency silencer of the present invention, and this silencing apparatus includes shell 2, lining 12, filtration of sound body shell 8, inner core 7 etc.This shell 2 is tubular and has suction port 1 and air outlet 2; Above-mentioned lining 12 is set at the inside of shell 12 and concentric with shell 2, and its two ends are fastened on by support plate 3 on the inwall of shell 2, and the inside of this lining 12 axially is separated into two-part by dividing plate 13, offers a plurality of pore 4 on the perisporium of lining 12.Between above-mentioned shell 2 and above-mentioned lining 12, forming double wall air-flow path 11.Above-mentioned filtration of sound body shell 8 from the air outlet 10 to lining 12 innerly extend, expansion and become the loudspeaker streamline shape, and be arranged on one heart in the partitioned portion of air outlet 10 sides of lining 12 with lining 12, its flared end is fixedly connected on lining 12 inwalls by supporting slice 3.Above-mentioned inner core 7 and filtration of sound body shell 8 are arranged on the inside of filtration of sound body shell 8 with one heart, its opening end has radially outer flange, this flange edge is connected with the enlarging ora terminalis of filtration of sound body shell 8, thereby, on the sidewall of this inner core 7, offer be used to the to circulate exhaust of internal-combustion engine of a plurality of pores 4 with the sealing of the opening end of filtration of sound body shell 8.Between inner core 7 and filtration of sound body shell 8, forming filtration of sound exhaust passageway 5.On the inwall of above-mentioned filtration of sound body shell 8, be provided with sound absorbing material 6.
Fig. 3 is the another embodiment of low resistance and high efficiency silencer of the present invention, and this silencing apparatus includes shell 2, lining 12, filtration of sound body shell 8, inner core 7 etc.; Last shell 2 is for loudspeaker streamline shape and have suction port 1 and air outlet 10, above-mentioned lining 12 is and shell 2 similar shapes, its towards the air outlet 10 an end opening, the other end by conical lid 9 shutoff, this lining 12 is arranged in the shell 2 with one heart with shell 2, this lining 12 logical supporting slices 3 are fastened on 2 the inwall, are forming double wall air-flow path 11 between lining 12 and shell 2.Above-mentioned filtration of sound body shell 8 is neutral position and form horn-like roughly, 10 inside of extending, be expanded to lining 12 from the air outlet, its enlarging ora terminalis is fastened on the inwall of lining 12, the loudspeaker enlarging is towards suction port 1, on the trumpet-shaped conical surface wall of this filtration of sound body shell 8, offering a plurality of pores 4, the exhaust of combustion gas in being used to circulate.Above-mentioned inner core 7 forms and the corresponding awl tubular of the conical surface of filtration of sound body shell 8, and its vertex of a cone point is towards the air outlet 10, and the inwall of its edge of opening and lining 12 is connected to a fixed, and is arranged on the axially neutral position roughly of the inside of lining 12.On the side relative of this inner core 7, be provided with sound absorbing material 6, between inner core 7 and filtration of sound body shell-side 8, forming filtration of sound exhaust passageway 5 with filtration of sound body shell-side 8.
Fig. 4 is the another embodiment of low resistance and high efficiency silencer of the present invention, with reference to Fig. 2, Fig. 4, the low resistance and high efficiency silencer of present embodiment except the structure of inner core 7 with its with the Placement of filter sound body shell 8 and embodiment shown in Figure 2 different, remaining structure is identical, therefore omits the explanation to its same configuration part.Inner core 7 shapes of the silencing apparatus of present embodiment are roughly similar to the shape of filtration of sound body shell 8, a conical lid 9 respectively is installed at its two ends, this inner core 7 is by being fixedlyed connected above-mentioned conical lid 9 with one heart on the inwall of filtration of sound housing 8 with filtration of sound housing 8 with being connected of filtration of sound housing 8 by support plate 3, inner core 7 is made of sound absorbing material 6, is forming filtration of sound exhaust passageway 5 between inner core 7 and filtration of sound body shell 8.
Fig. 5 is an another embodiment of the present invention, and this embodiment's low resistance and high efficiency silencer includes shell 2, lining 12, filtration of sound body shell 8, inner core 7 etc.Above-mentioned shell 2 is tubular, is provided with suction port 1 and air outlet 10 thereon.Above-mentioned lining 12 is arranged on the inside of shell 2, and be fastened on one heart on the inwall of shell 2 by supporting slice 3 and shell 2, lining 12 on an end of suction port 1, connecting conical lid 9, with this port closed of lining 12, the awl point of this conical lid 9 is towards suction port 1 thus.10 the end opening towards the air outlet of this lining 12 offers a plurality of pores 4 on the perisporium of lining 12.Above-mentioned filtration of sound housing 8 is by 10 extending and expansion forms the plate funnel shaped and forms to lining 12 is inner from the air outlet, its bigger diameter end opening is towards suction port 1 and have flange towards suction port 1, offers a plurality of pores 4 on the plate diapire of filtration of sound body shell 8.Above-mentioned inner core 7 is planar, its outer periphery are connected with the bigger diameter end flange edge of filtration of sound body shell 8, seal the bigger diameter end opening of filtration of sound body shell 8 thus, on relative with filtration of sound body shell 8 side of inner core 7, be provided with sound-absorbing material 6, between inner core 7 and filtration of sound body shell 8, forming filtration of sound exhaust passageway 5.Above-mentioned filtration of sound body shell 8 is arranged on the inside of lining 12 with one heart with lining 12.
What Fig. 6 represented is another embodiment of the present invention, this embodiment's low resistance and high efficiency silencer except the shape of filtration of sound body shell 8 and with the Placement of inner core 7 and the described silencing apparatus of Fig. 5 different, other structure is identical, omits the explanation of its same section at this.In this embodiment, the filtration of sound body shell 8 of silencing apparatus forms the plate funnel-like, but the bigger diameter end of its plate portion is not established the such flange towards suction port 1 of Fig. 5, inner core 7 is fastened on by supporting slice 3 on the side of suction port 1 side of filtration of sound body shell 8, is provided with axial clearance and both outer periphery radially aligneds between the bigger diameter end outer periphery of the outer periphery of inner core 7 and filtration of sound body shell 8.
The flow area area in the above-mentioned filtration of sound exhaust passageway in any silencing apparatus of the various embodiments described above equals 0.6～1.2 times of actual internal area of the air inlet mouth of pipe or internal-combustion engine vent-pipe; The total actual internal area of offering on filtration of sound body shell or the inner core wall of pore equals 1.1～2 times of filtration of sound exhaust passageway.
Claims (11)
1. a low resistance and high efficiency silencer is characterized in that, it includes cylindrical case (2), tubular filtration of sound body shell (8), inner core (7) and conical lid (9); This cylindrical case (2) has suction port (1) and air outlet (10); This tubular filtration of sound body shell (8) forms the fusiform cylindrical shell of loudspeaker and constitutes by extending in shell (2) from steam outlet pipe (10) to enlarge, offer a plurality of pores (4) on the sidewall of this filtration of sound body shell (8), one end of the air inlet side of this filtration of sound body shell (8) is fastened on the inwall of shell (2) by supporting slice (3), is forming double wall air-flow path (11) between filtration of sound body shell (8) and shell (2); Above-mentioned inner core (7) has and filtration of sound body shell (8) similar shapes, this inner core (7) is in the inside of filtration of sound body shell (8), at this inner core (7) conical lid (9) is installed on an end of air outlet (10), coupled together by the inwall of supporting slice (3) with conical lid (9) and filtration of sound body shell (8), the end towards suction port (1) of this inner core (7) is fastened on the inwall of conical lid (9) of suction port (1) side that is connected with filtration of sound body shell (8).Between filtration of sound body shell (8) inwall and inner core (7), forming filtration of sound exhaust passageway (5).This inner core (7) is made of sound absorbing material (6).
2. low resistance and high efficiency silencer, lining (12) is set in its cylindrical case (2), this lining (12) is fixedly connected on the inwall of shell (2) by supporting slice (3), in this lining (2), in its axial roughly neutral position dividing plate (13) is being set, this dividing plate (13) with this lining (12) inner shaft to being divided into two-part, offering a plurality of pores (4) on the wall of this lining, this lining (12) is fastened on the inwall of shell (2) by supporting slice (3), between lining (12) and shell (2) inwall, form double wall air-flow path (11), constituting the silencer container thus.It is characterized in that, in above-mentioned silencer container, set up tail pipe filtration of sound device, this tail pipe filtration of sound device includes filtration of sound body shell (8), inner core (7), quieter material (6), and above-mentioned filtration of sound body shell (8) is to extend expansion and formation from outlet (10) in the partitioned portion of the air outlet side of lining (12); Between filtration of sound body shell (8) and inner core (7), forming filtration of sound exhaust passageway (5).
3. low resistance and high efficiency silencer, in its cylindrical case (2), be provided with lining (12), this lining (12) is fixedly connected on the shell (2) by supporting slice (3), on the end relative of this lining (12), be provided with conical lid (9) integratedly with suction port (1), and its awl point is towards suction port (1), offering a plurality of pores (4) on the perisporium of this lining (12), between lining (12) outer circumferential face and shell (2) internal face, forming double wall air-flow path (11), constitute the silencer container thus, it is characterized in that, in above-mentioned silencer container, set up tail pipe filtration of sound device, this tail pipe filtration of sound device includes filtration of sound body shell (8), inner core (7), quieter material (6), above-mentioned filtration of sound body shell (8) is arranged on the inside of lining (12), it is by (10) form to the inner extension expansion of lining (12) from the air outlet; Between filtration of sound body shell (8) and inner core (7), forming filtration of sound exhaust passageway (5).
4. silencing apparatus as claimed in claim 2, it is characterized in that, above-mentioned filtration of sound body shell (8) forms loudspeaker streamline shape, above-mentioned inner core (7) and filtration of sound body shell (8) are arranged on one heart on the sidewall of inside, this inner core (7) of filtration of sound body shell (8) and offer a plurality of pores (4), one end of (10) towards the air outlet of inner core (7) is being sealed by conical lid (9), the radially flange of the other end is connected with the flared end of filtration of sound body shell (8), and the awl point of conical lid (9) is towards the air outlet (10); On the inner peripheral surface of filtration of sound body shell (8), be provided with sound absorbing material (6).
5. silencing apparatus as claimed in claim 3, it is characterized in that, above-mentioned filtration of sound body shell (8) forms the conical horn shape, offers a plurality of pores (4) on the sidewall of this filtration of sound body shell 8, and the flared end of this filtration of sound body shell (8) is connected with the inwall of lining (12) and towards suction port (1); Above-mentioned inner core (7) for be connected with the inwall of lining (12) with similar coniform and its opening end of filtration of sound body shell 8, its awl is sharp towards the air outlet (10); The side relative with filtration of sound body shell (8) of this inner core (7) is provided with sound absorbing material (6).
6. silencing apparatus as claimed in claim 2 is characterized in that, above-mentioned filtration of sound body shell (8) forms loudspeaker streamline shape, offers a plurality of pores (4) on its sidewall, and its enlarging side is towards suction port (1); Last inner core (7) forms the column that two ends are taper, conical lid (9) is installed on its two ends, this inner core (7) is connected with the inwall of above-mentioned lining (12) by supporting slice (3) respectively by above-mentioned two conical lids (9) and is fixedly installed on one heart on the inside of lining (12) with filtration of sound body shell (8), and this inner core (7) is made of sound absorbing material 6.
7. silencing apparatus as claimed in claim 3 is characterized in that, above-mentioned filtration of sound body shell (8) forms the plate funnel-like, its bigger diameter end mouth is provided with to suction port (10) direction and extends outstanding flange, offers a plurality of pores (4) on its plate diapire; Above-mentioned inner core (7) is planar and is connected with the bigger diameter end mouth edge of filtration of sound body shell (8), thereby the bigger diameter end mouth of above-mentioned filtration of sound body shell (8) is sealed; The side of (10) towards the air outlet of inner core (7) is provided with sound absorbing material (6).
8. silencing apparatus as claimed in claim 3, it is characterized in that, above-mentioned filtration of sound body shell (8) forms the plate funnel-like, on its plate diapire, offer a plurality of pores (4), above-mentioned inner core (7) is planar, its side by supporting slice (3) be fastened on filtration of sound body shell 8 on the side of suction port (1) and both outward edges alignment, have axial clearance between the outer periphery of inner core (7) and filtration of sound body shell (8) the bigger diameter end outer periphery, inhale sound absorbing material (6) on the side of air outlet (10), being provided with of inner core (7).
9. any one described silencing apparatus in the claim 1～8 is characterized in that, described sound absorbing material (6) is wire gaze or sound-absorbing material fiber.
10. as any one described silencing apparatus in the claim 1～8, it is characterized in that the flow area area in above-mentioned filtration of sound exhaust passageway (5) equals logical 0.6～1.2 times of amassing of flow area of the air inlet mouth of pipe (1) or internal-combustion engine vent-pipe; The total actual internal area of the pore of offering on filtration of sound body shell (8) or inner core (7) wall (4) equals 1.1～2 times of filtration of sound exhaust passageway (5).
11. silencing apparatus as claimed in claim 9 is characterized in that, the actual internal area in above-mentioned filtration of sound exhaust passageway (5) equals 0.6～1.2 times of actual internal area of the air inlet mouth of pipe (1) or internal-combustion engine vent-pipe; The total actual internal area of the pore of offering on shell sound body shell (8) or inner core (7) wall (4) equals 1.1～2 times of filtration of sound exhaust passageway (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99106473 CN1099524C (en) | 1999-05-12 | 1999-05-12 | Low resistance and high efficiency silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99106473 CN1099524C (en) | 1999-05-12 | 1999-05-12 | Low resistance and high efficiency silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233707A true CN1233707A (en) | 1999-11-03 |
| CN1099524C CN1099524C (en) | 2003-01-22 |
Family
ID=5272398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99106473 Expired - Fee Related CN1099524C (en) | 1999-05-12 | 1999-05-12 | Low resistance and high efficiency silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099524C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575482A (en) * | 2014-12-29 | 2015-04-29 | 浙江天晨胶业股份有限公司 | Air silencer |
| CN105091298A (en) * | 2015-09-17 | 2015-11-25 | 珠海格力电器股份有限公司 | Silencer and air conditioner |
| WO2018107866A1 (en) * | 2016-12-15 | 2018-06-21 | 詹志光 | Titanium alloy muffler duct |
| CN114592944A (en) * | 2021-12-29 | 2022-06-07 | 江苏徐海环境监测有限公司 | Noise treatment equipment and use method thereof |
-
1999
- 1999-05-12 CN CN 99106473 patent/CN1099524C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575482A (en) * | 2014-12-29 | 2015-04-29 | 浙江天晨胶业股份有限公司 | Air silencer |
| CN105091298A (en) * | 2015-09-17 | 2015-11-25 | 珠海格力电器股份有限公司 | Silencer and air conditioner |
| WO2017045406A1 (en) * | 2015-09-17 | 2017-03-23 | 珠海格力电器股份有限公司 | Silencer and air conditioner |
| WO2018107866A1 (en) * | 2016-12-15 | 2018-06-21 | 詹志光 | Titanium alloy muffler duct |
| CN114592944A (en) * | 2021-12-29 | 2022-06-07 | 江苏徐海环境监测有限公司 | Noise treatment equipment and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1099524C (en) | 2003-01-22 |
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