CN109854542A - Hush pipe and ventilator with the hush pipe - Google Patents
Hush pipe and ventilator with the hush pipe Download PDFInfo
- Publication number
- CN109854542A CN109854542A CN201711244009.7A CN201711244009A CN109854542A CN 109854542 A CN109854542 A CN 109854542A CN 201711244009 A CN201711244009 A CN 201711244009A CN 109854542 A CN109854542 A CN 109854542A
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- noise reduction
- tube body
- hush pipe
- reduction tube
- pipe
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Abstract
The present invention relates to the field of medical instrument technology, disclose a kind of hush pipe, the casing including noise reduction tube body and for being arranged the noise reduction tube body；The noise reduction tube body is the tubular structure that outlet end is extended to from arrival end, its outer wall is equipped with multiple grooves opened up along axial direction, the arrival end of noise reduction tube body is run through in described groove one end, and the other end makes to form the recess end wall with end face structure on noise reduction tube body；When the noise reduction tube body is threaded through in described sleeve pipe, the multiple silencing cavities for being used for noise reduction are formed between the multiple groove and the inner wall of described sleeve pipe.The invention also discloses a kind of ventilators with the hush pipe.Hush pipe structure of the present invention is simple, and compared with traditional hush pipe structure, silencing cavity is easy to form, and has Double-noise-reduction effect；Ventilator of the invention can be effectively reduced the noise of blower generation, improve the comfort of Use of respirator.
Description
Technical field
The present invention relates to the field of medical instrument technology, and in particular to a kind of hush pipe and has the hush pipe ventilator.
Background technique
The noise level of ventilator directly affects the usage experience of user, therefore noise is the weight for evaluating ventilator performance
Want index.Noise is usually reduced by setting silencing means in ventilator at present, but is usually in wind in existing ventilator
The air inlet end of machine designs the silencing means such as bend, variable cross-section；But during air of the blower to inflow accelerates
The noise of different frequency can be also generated, this is the main source of existing ventilator noise.
Accordingly, it is desirable to provide a kind of hush pipe and the ventilator with the hush pipe, by the air outlet slit end of blower
Joint noise reduction device reduces the noise generated by blower.
Summary of the invention
The present invention provides a kind of hush pipe and with the ventilator of the hush pipe, for solving in ventilator due to blower
The excessive problem of the noise of generation.
It is an object of the present invention to provide a kind of hush pipe, including noise reduction tube body and for being arranged the hush pipe
The casing of ontology；The noise reduction tube body is the tubular structure that outlet end is extended to from arrival end, and outer wall is equipped with multiple edges
The arrival end of noise reduction tube body is run through in the groove axially opened up, described groove one end, and the other end makes to form tool on noise reduction tube body
There is the recess end wall of end face structure；When the noise reduction tube body is threaded through in described sleeve pipe, the multiple groove and described sleeve pipe
Inner wall between formed be used for noise reduction multiple silencing cavities.
Further, length h=c/4f of the groove；The c is the velocity of sound, and f is the frequency to noise-reducing.
Further, length l >=c/ f of recess end wall tool noise reduction tube body outlet end1。
Further, the noise reduction tube body and casing are made of rubber material.
Second object of the present invention is to provide a kind of ventilator, and the ventilator includes blower and any of the above-described kind of institute
The hush pipe stated, the arrival end of the hush pipe are connect with the air outlet slit end of the blower.
Further, the radial dimension of the muffler ontology is greater than the radial dimension of the blower air outlet end.
Further, the ventilator further includes heating and moistening case, and the heating and moistening case includes sequentially connected heating
The opposite end of humidification chamber and escape pipe, the heating and moistening chamber and escape pipe connecting pin and the cannula exit end of the hush pipe connect
It connects.
Further, the sectional dimension of the heating and moistening chamber is greater than the sectional dimension of described sleeve pipe and the section of escape pipe
Size.Further, the blower is connected with heating and moistening case using removably.
Hush pipe structure of the invention is simple, and compared with traditional hush pipe structure, silencing cavity is easy to form, and has dual
Noise reduction effect；Ventilator of the invention can be effectively reduced the noise of blower generation, improve the comfort of Use of respirator.
Detailed description of the invention
Fig. 1 is the partial sectional view of silencing means in first embodiment of the invention.
Fig. 2 is the structural schematic diagram of muffler in first embodiment of the invention.
Fig. 3 is the partial structure diagram of ventilator in second embodiment of the invention.
Fig. 4 is the structural schematic diagram of heating and moistening case in second embodiment of the invention.
Fig. 5 is the partial sectional view of ventilator in second embodiment of the invention.
Fig. 6 is the partial sectional view of ventilator in the another alternate embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and the embodiments,
The present invention will be described in further detail.
In this specification, each component is arrival end close to one end that noise occurs in definition hush pipe, is occurred far from noise
One end be outlet end；Each gas in pipelines flow direction is defined to be axial, the direction of vertical axial is radial.
With reference to Fig. 1, Fig. 2, first embodiment of the invention provides a kind of hush pipe, including noise reduction tube body 1 and for covering
If the casing 2 of the noise reduction tube body 1；The noise reduction tube body is the tubular structure that outlet end 12 is extended to from arrival end 11,
1 outer wall of noise reduction tube body is equipped with multiple grooves 13 opened up along axial direction, and noise reduction tube body 1 is run through in described 13 one end of groove
Arrival end 11, the other end make on noise reduction tube body formed have end face structure recess end wall 131；The noise reduction tube body 1
When being threaded through in described sleeve pipe 2, the multiple noise reductions for being used for noise reduction are formed between the multiple groove 13 and the inner wall of described sleeve pipe 2
Chamber.
Hush pipe of the invention is quarter-wave hush pipe, and quarter-wave hush pipe is to utilize the anti-of interface
It penetrates, so that the sound wave propagated forward originally is returned to origin and is turned back again and propagate forward, reflected at the origin and not yet
Other sound waves propagated forward converge, since the two is equal on amplitude, the odd-multiple of poor 180 degree in phase, thus mutually
Interfere and offsets.The principle of noise reduction of hush pipe of the invention is as follows: (1) when noise from cannula inlet port end enter after, partial noise
Enter silencing cavity from noise reduction tube body arrival end, is reflected by recess end wall, so that sound wave is returned to noise reduction tube body arrival end,
Realize the effect for reducing noise；(2) it after partial noise enters from cannula inlet port end, is reflected by noise reduction tube body arrival end end wall,
So that sound wave returns to cannula inlet port end, the effect for reducing noise is realized.
Compared with traditional hush pipe structure, hush pipe is arranged to dismountable two parts by the present invention, so that silencing cavity
Molding is simpler, and casing of the invention can also be to the pipeline in denoising device, need to only be set up directly on noise reduction tube body
To which noise reduction can be realized in the pipeline of denoising device, the structure of hush pipe is simplified；In addition, hush pipe of the invention is with dual
Noise reduction improves noise reduction effect.
It should be noted that the length of the setting position and groove 13 of noise reduction tube body 1 of the invention in casing 2 is equal
It can be adjusted according to noise reduction demand.
In the present embodiment, the length h of the groove1=c/4f1, between described sleeve pipe arrival end and noise reduction tube body arrival end
Length h2=c/4f2；Wherein, the c is the velocity of sound, f1And f2For the frequency of noise to be reduced, can be the same or different.?
During reducing noise, the specification of hush pipe can be selected according to the main frequency of noise to be reduced, to realize more preferable
Noise reduction effect.
Further, length l >=c/f of recess end wall tool noise reduction tube body outlet end0；；The f0For to noise tribute
Offer the cutoff frequency of big frequency range.This programme can be avoided sound wave to be continued to transmit by diffraction across hush pipe, further
Improve noise reduction effect.
Further, the material of the noise reduction tube body and casing is rubber.The hush pipe of this programme has preferable drop
It makes an uproar effect.
With reference to Fig. 3 to Fig. 5, second embodiment of the invention provides a kind of sleep-respiratory machine, the sleep-respiratory of the present embodiment
Machine includes blower 3 and hush pipe as in the first embodiment, and the arrival end of the hush pipe and the air of the blower are gone out
The noise that the blower generates can be effectively reduced in the connection of mouth end.
Further, the radial dimension of the noise reduction tube body is greater than the radial dimension at the air outlet slit end of the blower.
This programme can effectively avoid hush pipe from generating resistance to blower.
Further, the sleep-respiratory machine further includes heating and moistening case 4；The heating and moistening case 4 includes being sequentially connected
Air inlet pipe 41, heating and moistening chamber 42 and escape pipe 43, the sectional dimension of the heating and moistening 42 radially be greater than air inlet pipe 41
With the sectional dimension of escape pipe 43 radially；The air inlet pipe 41 of the heating and moistening case 4 is connect with the outlet end of the hush pipe.
In the present solution, the variable cross-section between air inlet pipe, heating and moistening chamber and escape pipe designs, blower generation can be further decreased
Noise.
Further, the blower 3 is connected with heating and moistening case 4 using removably.
In an alternate embodiment of the invention, the difference with second embodiment is, the hush pipe is plugged in heating and moistening
In the air inlet pipe of case.
In the another alternate embodiment of the present invention, the difference with second embodiment is, as shown in fig. 6, the air inlet pipe 41 '
Casing as hush pipe, the noise reduction tube body 1 are set to air inlet pipe 41 ', form hush pipe with air inlet pipe 41 '.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within spirit and principle.
Claims (9)
1. a kind of hush pipe, which is characterized in that the casing including noise reduction tube body and for being arranged the noise reduction tube body；It is described
Noise reduction tube body is the tubular structure that outlet end is extended to from arrival end, and outer wall is equipped with multiple grooves opened up along axial direction,
The arrival end of noise reduction tube body is run through in described groove one end, and the other end makes to form the groove with end face structure on noise reduction tube body
End wall；When the noise reduction tube body is threaded through in described sleeve pipe, is formed and used between the multiple groove and the inner wall of described sleeve pipe
In multiple silencing cavities of noise reduction.
2. hush pipe according to claim 1, which is characterized in that the length h of the groove1=c/4f1；The c is the velocity of sound,
f1For the frequency to noise-reducing.
3. hush pipe according to claim 2, which is characterized in that the length of recess end wall tool noise reduction tube body outlet end
Spend l >=c/f0；The f0For the cutoff frequency to the big frequency range of noise contribution.
4. hush pipe according to claim 3, which is characterized in that the noise reduction tube body and casing are by rubber material system
At.
5. a kind of ventilator, which is characterized in that the ventilator include blower and according to any one of claims 1 to 4
Hush pipe, the arrival end of the hush pipe are connect with the air outlet slit end of the blower.
6. ventilator according to claim 5, which is characterized in that the radial dimension of the muffler ontology is greater than the wind
The radial dimension at machine air outlet slit end.
7. ventilator according to claim 6, which is characterized in that the ventilator further includes heating and moistening case, described to add
Temperature humidification case includes sequentially connected heating and moistening chamber and escape pipe, the opposite end of the heating and moistening chamber and escape pipe connecting pin
It is connect with the cannula exit end of the hush pipe.
8. ventilator according to claim 7, which is characterized in that the sectional dimension of the heating and moistening chamber is greater than the set
The sectional dimension of pipe and the sectional dimension of escape pipe.
9. ventilator according to claim 7, which is characterized in that the blower and heating and moistening case use removably
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244009.7A CN109854542A (en) | 2017-11-30 | 2017-11-30 | Hush pipe and ventilator with the hush pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244009.7A CN109854542A (en) | 2017-11-30 | 2017-11-30 | Hush pipe and ventilator with the hush pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854542A true CN109854542A (en) | 2019-06-07 |
Family
ID=66888877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711244009.7A Pending CN109854542A (en) | 2017-11-30 | 2017-11-30 | Hush pipe and ventilator with the hush pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854542A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5952625A (en) * | 1998-01-20 | 1999-09-14 | Jb Design, Inc. | Multi-fold side branch muffler |
| CN101466949A (en) * | 2006-05-03 | 2009-06-24 | 惠而浦股份有限公司 | Resonator arrangement in an acoustic muffler for a refrigeration compressor |
| CN101947343A (en) * | 2003-06-20 | 2011-01-19 | 雷斯梅德有限公司 | Flow generator with patient promoting system |
| WO2017064975A1 (en) * | 2015-10-16 | 2017-04-20 | 株式会社メトラン | Silencer and ventilator |
| CN207621083U (en) * | 2017-11-30 | 2018-07-17 | 深圳市美好创亿医疗科技有限公司 | Hush pipe and lung ventilator with the hush pipe |
-
2017
- 2017-11-30 CN CN201711244009.7A patent/CN109854542A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5952625A (en) * | 1998-01-20 | 1999-09-14 | Jb Design, Inc. | Multi-fold side branch muffler |
| CN101947343A (en) * | 2003-06-20 | 2011-01-19 | 雷斯梅德有限公司 | Flow generator with patient promoting system |
| CN101466949A (en) * | 2006-05-03 | 2009-06-24 | 惠而浦股份有限公司 | Resonator arrangement in an acoustic muffler for a refrigeration compressor |
| WO2017064975A1 (en) * | 2015-10-16 | 2017-04-20 | 株式会社メトラン | Silencer and ventilator |
| CN207621083U (en) * | 2017-11-30 | 2018-07-17 | 深圳市美好创亿医疗科技有限公司 | Hush pipe and lung ventilator with the hush pipe |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Applicant after: Shenzhen meimeimeichuangyi Medical Technology Co., Ltd Address before: Longgang District of Shenzhen City, Guangdong province 518116 Longgang Street Community 6 new road bridge Baolong Baolong Industrial Park building B building 1-3 floor Applicant before: MEHOW INNOVATIVE Ltd. |
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| CB02 | Change of applicant information |