CN109854542B - Silencer tube and ventilator having the same - Google Patents
Silencer tube and ventilator having the same Download PDFInfo
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- CN109854542B CN109854542B CN201711244009.7A CN201711244009A CN109854542B CN 109854542 B CN109854542 B CN 109854542B CN 201711244009 A CN201711244009 A CN 201711244009A CN 109854542 B CN109854542 B CN 109854542B
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- silencer
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- pipe body
- silencing
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Abstract
本发明涉及医疗器械技术领域，公开了一种消音管，包括消音管本体和用于套设所述消音管本体的套管；所述消音管本体为从入口端延伸至出口端的管状结构，其外壁上设有多个沿轴向开设的凹槽，所述凹槽一端贯穿消音管本体的入口端，另一端使消音管本体上形成具有端面结构的凹槽端壁；所述消音管本体穿设在所述套管内时，所述多个凹槽与所述套管的内壁之间形成用于消音的多个消音腔。本发明还公开了一种具有该消音管的呼吸机。本发明消音管结构简单，与传统消音管结构相比，消音腔易于成型，且具有双重降噪效果；本发明的呼吸机能够有效降低风机产生的噪音，提高了呼吸机使用的舒适性。
The present invention relates to the technical field of medical devices, and discloses a silencer pipe, comprising a silencer pipe body and a sleeve for sleeve-mounting the silencer pipe body; the silencer pipe body is a tubular structure extending from the inlet end to the outlet end, and a plurality of grooves opened along the axial direction are provided on the outer wall thereof, one end of the grooves penetrates the inlet end of the silencer pipe body, and the other end forms a groove end wall with an end face structure on the silencer pipe body; when the silencer pipe body is inserted into the sleeve, a plurality of silencer cavities for silencer are formed between the plurality of grooves and the inner wall of the sleeve. The present invention also discloses a respirator having the silencer pipe. The silencer pipe of the present invention has a simple structure, and compared with the traditional silencer pipe structure, the silencer cavity is easy to form and has a dual noise reduction effect; the respirator of the present invention can effectively reduce the noise generated by the fan and improve the comfort of using the respirator.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a silencing pipe and a respirator with the same.
Background
The noise level of a ventilator directly affects the user experience, and therefore noise is an important indicator for evaluating ventilator performance. At present, noise is usually reduced by arranging a silencer in the breathing machine, but the silencer such as a curve, a variable cross section and the like is usually designed at the air inlet end of a fan in the existing breathing machine; but different frequencies of noise are also generated during the acceleration of the incoming air by the blower, which is a major source of noise in existing ventilators.
Accordingly, there is a need to provide a muffler pipe and a ventilator having the same, which reduce noise generated by a blower by connecting a muffler device to an air outlet end of the blower.
Disclosure of Invention
The invention provides a silencing pipe and a breathing machine with the same, which are used for solving the problem of overlarge noise generated by a fan in the breathing machine.
An object of the present invention is to provide a muffler pipe including a muffler pipe body and a sleeve for sleeving the muffler pipe body; the silencer pipe body is of a tubular structure extending from an inlet end to an outlet end, the outer wall of the silencer pipe body is provided with a plurality of grooves which are axially formed, one end of each groove penetrates through the inlet end of the silencer pipe body, and the other end of each groove enables the silencer pipe body to form a groove end wall with an end face structure; when the silencing pipe body is arranged in the sleeve in a penetrating mode, a plurality of silencing cavities used for silencing are formed between the grooves and the inner wall of the sleeve.
Further, the length of the groove h=c/4 f; and c is sound velocity, and f is the frequency of the noise to be reduced.
Further, the length l of the end wall of the groove from the outlet end of the silencing pipe body is larger than or equal to c/f 1.
Further, the silencer pipe body and the sleeve are made of rubber materials.
A second object of the present invention is to provide a ventilator, which includes a fan and any of the above-mentioned silencer pipes, wherein an inlet end of the silencer pipe is connected to an air outlet end of the fan.
Further, the radial dimension of the muffler body is greater than the radial dimension of the fan air outlet end.
Further, the breathing machine also comprises a heating and humidifying box, wherein the heating and humidifying box comprises a heating and humidifying cavity and an air outlet pipe which are sequentially connected, and the opposite end of the connecting end of the heating and humidifying cavity and the air outlet pipe is connected with the outlet end of the sleeve pipe of the silencing pipe.
Further, the section size of the heating and humidifying cavity is larger than the section size of the sleeve and the section size of the air outlet pipe. Further, the fan and the heating and humidifying box are detachably connected.
Compared with the traditional silencing pipe structure, the silencing pipe has the advantages that the silencing cavity is easy to form and has double noise reduction effects; the ventilator provided by the invention can effectively reduce noise generated by the fan and improve the comfort of the ventilator.
Drawings
Fig. 1 is a partial cross-sectional view of a muffler device in a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a muffler in the first embodiment of the present invention.
Fig. 3 is a schematic view of a part of the structure of a ventilator according to a second embodiment of the present invention.
Fig. 4 is a schematic structural view of a heating and humidifying box in a second embodiment of the present invention.
Fig. 5 is a partial cross-sectional view of a ventilator in a second embodiment of the invention.
Fig. 6 is a partial cross-sectional view of a ventilator in yet another alternative embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and embodiments, in order to make the objects, technical solutions and advantages of the present invention more apparent.
In the specification, one end of each part in the silencing pipe, which is close to the noise generation end, is defined as an inlet end, and one end, which is far away from the noise generation end, is defined as an outlet end; the flow direction of the gas in each pipeline is defined as an axial direction, and the direction perpendicular to the axial direction is defined as a radial direction.
Referring to fig. 1 and 2, a first embodiment of the present invention provides a muffler pipe including a muffler pipe body 1 and a sleeve 2 for sleeving the muffler pipe body 1; the silencer pipe body is of a tubular structure extending from an inlet end 11 to an outlet end 12, a plurality of grooves 13 which are formed along the axial direction are formed in the outer wall of the silencer pipe body 1, one end of each groove 13 penetrates through the inlet end 11 of the silencer pipe body 1, and the other end of each groove 13 enables a groove end wall 131 with an end face structure to be formed on the silencer pipe body; when the silencing pipe body 1 is arranged in the sleeve 2 in a penetrating mode, a plurality of silencing cavities for silencing are formed between the grooves 13 and the inner wall of the sleeve 2.
The invention relates to a sound-deadening pipe with quarter wavelength, which uses the reflection of interface to make the original forward sound wave return to the original point and return to the forward, where it is converged with other forward sound wave which has not been reflected, because the two are equal in amplitude, and the phase difference is 180 degree odd times, so that they interfere with each other to cancel. The noise reduction principle of the silencing pipe is as follows: (1) When noise enters from the inlet end of the sleeve, part of the noise enters the silencing cavity from the inlet end of the silencing pipe body and is reflected by the end wall of the groove, so that sound waves return to the inlet end of the silencing pipe body again, and the effect of reducing the noise is achieved; (2) After entering from the sleeve inlet end, part of noise is reflected by the end wall of the inlet end of the silencing pipe body, so that sound waves return to the sleeve inlet end, and the effect of reducing the noise is achieved.
Compared with the traditional silencer pipe structure, the silencer pipe is arranged into two detachable parts, so that the silencing cavity is simpler to form, the sleeve pipe can also be a pipeline in the device to be noise reduced, noise reduction can be realized only by directly arranging the silencer pipe body in the pipeline of the device to be noise reduced, and the structure of the silencer pipe is simplified; in addition, the silencing pipe has double noise reduction and improves the noise reduction effect.
It should be noted that, the setting position of the silencer tube body 1 in the sleeve 2 and the length of the groove 13 can be adjusted according to the noise reduction requirement.
In this embodiment, the length h 1＝c/4f1 of the groove, the length h 2＝c/4f2 between the inlet end of the sleeve and the inlet end of the silencer pipe body; wherein c is the sound velocity, and f 1 and f 2 are the frequencies of the noise to be reduced, which may be the same or different. In the process of reducing noise, the specification of the silencing pipe can be selected according to the main frequency of the noise to be reduced, so that a better noise reduction effect is realized.
Further, the length l of the end wall of the groove from the outlet end of the silencing pipe body is more than or equal to c/f 0; ; the f 0 is the cut-off frequency of the large frequency band contributing to noise. According to the scheme, sound waves can be prevented from being transmitted continuously through the silencing pipe through diffraction, and the noise reduction effect is further improved.
Further, the silencing pipe body and the sleeve are made of rubber. The muffler pipe of this scheme has better noise reduction effect.
Referring to fig. 3 to 5, a second embodiment of the present invention provides a sleeping respirator, which includes a fan 3 and a muffler pipe as described in the first embodiment, and the inlet end of the muffler pipe is connected to the air outlet end of the fan, so that noise generated by the fan can be effectively reduced.
Further, the radial dimension of the silencer pipe body is larger than the radial dimension of the air outlet end of the fan. The resistance of the silencer pipe to the fan can be effectively avoided.
Further, the sleeping respirator also comprises a heating and humidifying box 4; the heating and humidifying box 4 comprises an air inlet pipe 41, a heating and humidifying cavity 42 and an air outlet pipe 43 which are sequentially connected, wherein the radial cross section size of the heating and humidifying cavity 42 is larger than that of the air inlet pipe 41 and the air outlet pipe 43; the air inlet pipe 41 of the heating and humidifying box 4 is connected with the outlet end of the silencing pipe. In this scheme, the variable cross-section design between intake pipe, heating humidification chamber and the outlet duct can further reduce the noise that the fan produced.
Further, the fan 3 and the heating and humidifying box 4 are detachably connected.
In an alternative embodiment of the present invention, the difference from the second embodiment is that the muffler pipe is inserted into the air inlet pipe of the heating and humidifying box.
In yet another alternative embodiment of the present invention, as shown in fig. 6, the intake pipe 41' is used as a sleeve of a muffler pipe, and the muffler pipe body 1 is provided to the intake pipe 41' to constitute a muffler pipe with the intake pipe 41 '.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (9)
1. The silencer pipe is characterized by comprising a silencer pipe body and a sleeve pipe used for sleeving the silencer pipe body; the silencer pipe body is of a tubular structure extending from an inlet end to an outlet end, the outer wall of the silencer pipe body is provided with a plurality of grooves which are axially formed, one end of each groove penetrates through the inlet end of the silencer pipe body, and the other end of each groove enables the silencer pipe body to form a groove end wall with an end face structure; when the silencing pipe body is arranged in the sleeve in a penetrating way, a plurality of silencing cavities for silencing are formed between the grooves and the inner wall of the sleeve, the inlet end of the silencing pipe body is a certain length away from the inlet end of the sleeve, the extending direction of the grooves is parallel to the central axis of the silencing pipe, and the arrangement position of the silencing pipe body in the sleeve is adjustable; after entering from the inlet end of the sleeve, part of noise is reflected by the end wall of the inlet end of the silencing pipe body and returns to the inlet end of the sleeve, so that interference noise reduction is realized.
2. The silencer duct of claim 1, wherein the groove has a length h 1=c/4f1; and c is the sound velocity, and f 1 is the frequency of the noise to be reduced.
3. The silencer duct of claim 2, wherein the length l of the end wall of the groove from the outlet end of the silencer duct body is greater than or equal to c/f 0; the f 0 is the cut-off frequency of the large frequency band contributing to noise.
4. A silencer duct according to claim 3, wherein the silencer duct body and the sleeve are made of rubber material.
5. A ventilator comprising a blower and a silencer duct according to any one of claims 1 to 4, the inlet end of the silencer duct being connected to the air outlet end of the blower.
6. The ventilator of claim 5, wherein the muffler body has a radial dimension greater than a radial dimension of the blower air outlet end.
7. The ventilator of claim 6, further comprising a warming and humidification chamber and an outlet tube connected in sequence, wherein the opposite end of the connecting end of the warming and humidification chamber and the outlet tube is connected to the sleeve outlet end of the silencer tube.
8. The ventilator of claim 7, wherein the warming and humidification chamber has a cross-sectional dimension that is greater than a cross-sectional dimension of the sleeve and a cross-sectional dimension of the outlet tube.
9. The ventilator of claim 7, wherein the blower and the warming and humidification tank are removably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244009.7A CN109854542B (en) | 2017-11-30 | 2017-11-30 | Silencer tube and ventilator having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244009.7A CN109854542B (en) | 2017-11-30 | 2017-11-30 | Silencer tube and ventilator having the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854542A CN109854542A (en) | 2019-06-07 |
| CN109854542B true CN109854542B (en) | 2024-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711244009.7A Active CN109854542B (en) | 2017-11-30 | 2017-11-30 | Silencer tube and ventilator having the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854542B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5952625A (en) * | 1998-01-20 | 1999-09-14 | Jb Design, Inc. | Multi-fold side branch muffler |
| EP2392375B1 (en) * | 2003-06-20 | 2016-01-06 | ResMed Ltd. | Breathable gas apparatus with humidifier |
-
2017
- 2017-11-30 CN CN201711244009.7A patent/CN109854542B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109854542A (en) | 2019-06-07 |
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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: SHENZHEN MEIHAO CHUANGYI MEDICAL TECHNOLOGY Co.,Ltd. |
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