CN101075431A - Silencer and respirator therewith - Google Patents
Silencer and respirator therewith Download PDFInfo
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- CN101075431A CN101075431A CN 200610080596 CN200610080596A CN101075431A CN 101075431 A CN101075431 A CN 101075431A CN 200610080596 CN200610080596 CN 200610080596 CN 200610080596 A CN200610080596 A CN 200610080596A CN 101075431 A CN101075431 A CN 101075431A
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Abstract
A noise reduction device used on rebreather is prepared as setting spiral air passage at internal of said device, arranging air inlet at external end of said air passage and air outlet at internal end center of said air passage, setting round arc-surface structure on side wall of spiral air passage and convex shoulder between side wall top-edge and air inlet. The said noise reduction device is installed at air inlet of fan on rebreather.
Description
Technical field
The present invention relates to a kind of quieter and use the lung ventilator of this quieter.
Background technology
At present, use the lung ventilator of motor-driven generation source of the gas the most general with noninvasive ventilator.Noninvasive ventilator is used for sleep apnea syndrome and COPD (CAO disease) etc. are breathed the treatment of illness.The kind of at present popular noninvasive ventilator mainly contains CPAP (stable malleation output is provided during patient respiratory), AUTOCPAP and (provides malleation output to the patient.When patient's airway resistance increased and has influence on eupnea, it is normal to patient respiratory that lung ventilator improves output pressure automatically; Patient respiratory just often, lung ventilator can be reduced to output pressure the threshold pression of keeping patient's eupnea), Bi-Level CPAP (output of higher malleation is provided when the patient is air-breathing, lower malleation output is provided during expiration) etc.SARS (atypical pneumonia) occurring in China was once used period in a large number.Product is just comfortable towards using, operating noise is low, volume is little, lightweight direction develops.
The characteristics of noninvasive ventilator be by nasal mask or oral nose mask to patient treatment, no wound.The blower fan that lung ventilator uses comprises body 7, motor 13 and impeller as shown in Figure 9, and impeller is driven in body 7 along E to rotation by motor 13, and the axis direction of body 7 upper edge impellers is provided with fan air inlet 8, is provided with blower fan gas outlet 12 along the tangential direction of impeller.During machine operation, because rotating speed can produce very strong noise at thousands of extremely up to ten thousand rev/mins.The following method of general at present many employings abates the noise: sound-absorbing, sound insulation, damping.
Sound-absorbing---use acoustical material such as sound-absorbing sponge etc. place and absorb noise in the gas passage; Sound insulation---use high density material such as aluminium sheet, iron plate etc. to form crooked gas passage, a large amount of sound are spread out of every reducing in gas passage; Damping---utilizing parcel motors such as vibration-absorptive material such as sponge, rubber, the kinetic energy of avoiding shaking is converted into acoustic energy.As the related breathing machine of the U.S. big health (Respironics) company, company of the safe section (TYCO) of the U.S., use the rubber and plastic of injection mo(u)lding or sponge material to wrap up the motor damping, form air flue sound-absorbing, sound insulation.The product of powerful and wealthy (HOFFRICHTER) company of Germany is to place motor and form air flue by aluminum in the aluminium box, pastes the sound-absorbing sponge in the air flue, utilizes this gas passage sound insulation, sound-absorbing.
The method of above-mentioned several noise reductions is all undesirable, can increase the volume and weight of equipment, especially can increase the resistance of lung ventilator air flue.The mutual relationship of pressure, flow and resistance is: P=I * R wherein P is the output pressure of system, and I is a flow, and R is the resistance of system.When lung ventilator was exported certain pressure P, if the air flue internal resistance R of system increases, delivery rate I will reduce.After the resistance of air flue in the lung ventilator acquires a certain degree, can make lung ventilator can not satisfy treatment patient's requirement because of the reduction of system output stream amount.Need trigger the lung ventilator of work to patient respiratory to those, (provide higher malleation output when the patient is air-breathing as Bi-Level CPAP type, lower malleation output is provided during expiration) lung ventilator, if the airway resistance in the lung ventilator is higher, will reduce the susceptibility of system's inner sensor relatively to people's airway resistance variation, thereby reduce the susceptibility of machine, influence the operate as normal of lung ventilator people's respiratory triggering.Therefore, when carrying out noise-decreasing, need the increase of strict control airway resistance.We can say and utilize the sound insulation of air flue sound-absorbing, with the increase of control airway resistance be a pair of contradiction, the airway resistance effects limit utilize in the machine air flue to the means of lung ventilator noise reduction.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, volume is little, the quieter of in light weight, good muffling effect and use the lung ventilator of this quieter.
The objective of the invention is to be achieved through the following technical solutions:
The inside of quieter of the present invention is provided with helical intake, and the air intake opening of helical intake is located at the outer end of helical intake, and the inner center of helical intake is located at and perpendicular to the helical planes of helical intake in the gas outlet of helical intake.
Described quieter comprises main body and loam cake, and described loam cake is buckled on the main body, between form the snail air flue.
The position that the edge of described loam cake and the sidewall of helical intake interlock is provided with flange, and described flange is held in the outside of helical intake sidewall.
The position that the edge of described loam cake is positioned at air intake opening is designed to globoidal structure.
The air intake opening of described helical intake is along the tangential direction of the helix of helical intake.
The spiral yarn shaped of described helical intake is involute urve or equidistant helix or spiral of Archimedes.
Interior edge near the position, gas outlet on the sidewall of described helical intake is slick and sly globoidal structure.
The sidewall of described helical intake is provided with convex shoulder, on the sidewall in described convex shoulder is located between edge and the air intake opening.
The cambered surface on the sidewall of described helical intake edge in air intake opening carries out the transition to sleekly along convex shoulder.
The present invention uses the lung ventilator of above-mentioned quieter, comprise blower fan, described blower fan comprises body, motor and impeller, impeller is rotated in body by driven by motor, the axis direction of body upper edge impeller is provided with fan air inlet, tangential direction along impeller is provided with the blower fan gas outlet, above-mentioned quieter is equipped with at described fan air inlet place, the gas outlet of described quieter is over against fan air inlet, the rotation direction of the helical intake of described quieter is identical with turning to of draught fan impeller, rotate into fan air inlet behind the helical intake of gas by quieter, gas by after the identical rotation direction rotation, is discharged from the blower fan gas outlet in blower fan afterwards.
As seen from the above technical solution provided by the invention, quieter of the present invention and use the lung ventilator of this quieter, owing to will turn to identical helical intake to be placed on the top of the fan air inlet of lung ventilator with impeller, make air under the effect of fan air inlet negative pressure, rotate into fan air inlet by the rotation direction identical with impeller.Like this, both can reduce the noise that impeller and windage produce, can reduce the low frequency noise that produces because of " bottleneck effect " with fan air inlet again;
Again since on the air intake opening of helical intake and the sidewall between the interior edge appropriate location be provided with convex shoulder, and slowly carry out the transition to interior edge, the edge constitutes by having certain thickness cambered surface simultaneously, can make most of air-flow after the convex shoulder place quickens and adjusts direction, enter fan air inlet like this along impeller rolling tangential direction, and can reduce the frictional resistance on the interior edge of air-flow and helical intake sidewall, thereby reduce the noise that produces because of friction.
Simple in structure, volume is little, in light weight, good muffling effect, under the situation of equal volume, weight, the lung ventilator noise significantly is lower than similar lung ventilator, is specially adapted to the small portable lung ventilator.
Simultaneously, quieter of the present invention also is applicable to the noise reduction of other centrifugal fan, and similar air-flow is carried out pre-service.
Below, with embodiment technical scheme of the present invention is done further detailed elaboration in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the structural representation of the main body of quieter specific embodiment of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to cut-open view;
Fig. 3 is that the B-B of Fig. 1 is to cut-open view;
Fig. 4 is the perspective view of the main body of quieter specific embodiment of the present invention;
Fig. 5 is the structural representation of the loam cake of quieter specific embodiment of the present invention;
Fig. 6 is that the C-C of Fig. 5 is to cut-open view;
Fig. 7 is that the D-D of Fig. 5 is to partial sectional view;
Fig. 8 is the one-piece construction synoptic diagram of quieter specific embodiment of the present invention;
Fig. 9 is not for being equipped with the structural representation of the blower fan of quieter in the prior art;
Figure 10 is equipped with the structural representation of quieter on blower fan for the present invention.
Embodiment
The preferable embodiment of quieter of the present invention as shown in Figure 8, the inside of quieter is provided with helical intake, and the air intake opening 1 of helical intake is located at the outer end of helical intake, and quieter comprises main body 10 and loam cake 9, loam cake 9 is buckled on the main body 10, between form the snail air flue.
The main body 10 of quieter is as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, and the inner center of helical intake 3 is located at and perpendicular to the helical planes of helical intake 3 in the gas outlet 6 of helical intake 3.The air intake opening 1 of helical intake 3 is along the tangential direction of the helix of helical intake 3.The spiral yarn shaped of helical intake 3 can be involute urve or equidistant helix or spiral of Archimedes, also can be the spiral yarn shaped of other form.
The interior of close 6 positions, gas outlet is slick and sly globoidal structure along 4 on the sidewall 5 of helical intake 3.The sidewall 5 of helical intake 3 is provided with convex shoulder 2, described convex shoulder 2 be located in along 4 and air intake opening 1 between sidewall 5 on.The sidewall 5 of helical intake 3 in air intake opening 1 carries out the transition to sleekly along convex shoulder 2 along 4 cambered surface.
As Fig. 5, Fig. 6, shown in Figure 7, the position that the edge of the loam cake 9 of quieter and the sidewall 5 of helical intake 3 interlock is provided with flange 11, and described flange 11 is held in the outside of the sidewall 5 of helical intake 3.
The position that the edge of loam cake 9 is positioned at air intake opening 1 is designed to globoidal structure.
The blower fan that lung ventilator of the prior art uses as shown in Figure 9, comprise body 7, motor 13 and impeller, impeller is driven in body 7 along E to rotation by motor 13, and the axis direction of body 7 upper edge impellers is provided with fan air inlet 8, is provided with blower fan gas outlet 12 along the tangential direction of impeller.
The present invention uses blower fan that the lung ventilator of above-mentioned quieter uses as shown in figure 10, quieter of the present invention is equipped with at fan air inlet 8 places, the gas outlet 6 of quieter is over against fan air inlet 8, the rotation direction of the helical intake 3 of quieter turns to E identical with draught fan impeller, rotate into fan air inlet 8 behind the helical intake 3 of gas by quieter, by after the identical rotation direction rotation, 12 discharge gas from the blower fan gas outlet in blower fan afterwards.
Technological core of the present invention is to place exhaust box at fan air inlet.Find that after tested the noise during blower fan work more than 90% is from fan air inlet.Exhaust box can significantly reduce the generation of fan air inlet noise and seldom increase the resistance of air flue.Do not handle if the noise of fan air inlet is not carried out noise abatement, then the sound-absorbing of back, soundproof measures can take very big space and gain in weight, and increase resistance in the gas passage because of the remarkable increase of silencers channel.After adding exhaust box, under lung ventilator reached same noise level, volume, weight all can obviously reduce.Or under similar volume, weight condition, the noise of lung ventilator can significantly descend.
The noise reduction principle of quieter of the present invention is:
During blower fan work, the noise more than 90% results from fan air inlet, and the noise of air intake opening is divided into two kinds again: a kind of is the friction that results from the impeller and the air of rotation, and friction noise is based on upper frequency; Another kind is the noise based on lower frequency (characteristics of this class blower fan are that air intake opening is less, and inner chamber is bigger) that " bottleneck effect " produces, and this part noise is lower because of frequency, in case produce, eliminates the comparison difficulty.The present invention is directed to these two kinds of noises and produce reason, air-flow mode of entrance, direction by adjustment enters blower fan reduce the generation of noise.
As shown in Figure 9, generally speaking, air is that the hemisphere face space from fan air inlet top sucks.
Wherein consistent with the wheel rotation direction that part of air and the friction of impeller are less relatively.With the air-flow of the less direction of plane vertical line angle of fan air inlet, because of the low frequency noise that " bottleneck effect " produces more.At these two characteristics, the present invention does pre-service to the air-flow that enters fan air inlet.
As shown in figure 10, the present invention utilizes aerodynamic principle, to turn to identical spiral or similar helical intake to be placed on the top of fan air inlet with impeller, and make air under the effect of fan air inlet negative pressure, rotate into fan air inlet by the rotation direction identical with impeller.Like this, both can reduce the fricative noise of impeller and air, can reduce the noise that produces because of " bottleneck effect " with the air-flow of fan air inlet again.
As shown in Figure 1, interior edge for fear of air and helical intake sidewall produces serious friction force, the appropriate location is provided with convex shoulder on the air intake opening of helical intake and the sidewall between the interior edge, and slowly carry out the transition to interior edge, the edge constitutes by having certain thickness cambered surface simultaneously, can make most of air-flow after the convex shoulder place quickens and adjusts direction, enter fan air inlet like this along impeller rolling tangential direction, and can reduce the frictional resistance on the interior edge of air-flow and helical intake sidewall, thereby reduce the noise that produces because of friction.
Helical intake has also formed good guide effect to the noise of fan air inlet, and the air intake opening that guarantees helical intake during installation is directly imported in the noise reduction road a large amount of noises over against the noise reduction road, can obviously improve elimination efficiency.
The invention enables lung ventilator under the situation of equal volume, weight, noise significantly is lower than similar lung ventilator, is specially adapted to the small portable lung ventilator.
The present invention also can be with other similar method, use with draught fan impeller and turn to identical spiral or similar helical intake, air-flow is pressed the draught fan impeller sense of rotation imports fan air inlet, and in front on the basis of method internally along adopting slick and sly globoidal structure.
Quieter of the present invention not only is applicable to lung ventilator, also is applicable to the noise reduction of other centrifugal fan, and similar air-flow is carried out pre-service.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (10)
1, a kind of quieter is characterized in that, the inside of described quieter is provided with helical intake, and the air intake opening of helical intake is located at the outer end of helical intake, and the inner center of helical intake is located at and perpendicular to the helical planes of helical intake in the gas outlet of helical intake.
2, quieter according to claim 1 is characterized in that, comprises main body and loam cake, and described loam cake is buckled on the main body, between form the snail air flue.
3, quieter according to claim 2 is characterized in that, the position that the edge of described loam cake and the sidewall of helical intake interlock is provided with flange, and described flange is held in the outside of helical intake sidewall.
4, quieter according to claim 3 is characterized in that, the position that the edge of described loam cake is positioned at air intake opening is designed to globoidal structure.
5, quieter according to claim 1 and 2 is characterized in that, the air intake opening of described helical intake is along the tangential direction of the helix of helical intake.
6, quieter according to claim 1 and 2 is characterized in that, the spiral yarn shaped of described helical intake is involute urve or equidistant helix or spiral of Archimedes.
7, quieter according to claim 1 and 2 is characterized in that, the interior edge near the position, gas outlet on the sidewall of described helical intake is slick and sly globoidal structure.
8, quieter according to claim 7 is characterized in that, the sidewall of described helical intake is provided with convex shoulder, on the sidewall in described convex shoulder is located between edge and the air intake opening.
9, quieter according to claim 8 is characterized in that, the cambered surface on the sidewall of described helical intake edge in air intake opening carries out the transition to sleekly along convex shoulder.
10, a kind of lung ventilator of using above-mentioned quieter, comprise blower fan, described blower fan comprises body, motor and impeller, impeller is rotated in body by driven by motor, the axis direction of body upper edge impeller is provided with fan air inlet, tangential direction along impeller is provided with the blower fan gas outlet, it is characterized in that, above-mentioned quieter is equipped with at described fan air inlet place, the gas outlet of described quieter is over against fan air inlet, and the rotation direction of the helical intake of described quieter is identical with turning to of draught fan impeller, rotates into fan air inlet behind the helical intake of gas by quieter, gas by after the identical rotation direction rotation, is discharged from the blower fan gas outlet in blower fan afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610080596A CN100587804C (en) | 2006-05-19 | 2006-05-19 | Silencer and respirator therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610080596A CN100587804C (en) | 2006-05-19 | 2006-05-19 | Silencer and respirator therewith |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101075431A true CN101075431A (en) | 2007-11-21 |
| CN100587804C CN100587804C (en) | 2010-02-03 |
Family
ID=38976429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610080596A Ceased CN100587804C (en) | 2006-05-19 | 2006-05-19 | Silencer and respirator therewith |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100587804C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732967A (en) * | 2013-10-29 | 2015-06-24 | 杨军 | Acoustic shielding screen for absorbing sound by using coplanar hollow tube |
| CN105369490A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Sound-attenuation dustproof cover for air suction device of sewing machine |
| CN105736480A (en) * | 2016-04-28 | 2016-07-06 | 深圳市大雅医疗技术有限公司 | Small fan, air inlet denoising device thereof and respirator adopting same |
| CN106345025A (en) * | 2016-11-18 | 2017-01-25 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN106422012A (en) * | 2016-11-18 | 2017-02-22 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN106730203A (en) * | 2016-12-28 | 2017-05-31 | 北京怡和嘉业医疗科技股份有限公司 | For the noise-decreasing device and lung ventilator of lung ventilator |
| CN107424597A (en) * | 2017-09-06 | 2017-12-01 | 无锡市拓发自控设备有限公司 | Safety-type oil-collecting formula muffler |
| CN108279579A (en) * | 2017-12-18 | 2018-07-13 | 西北工业大学 | A kind of Large Underwater platform noise reduction system with class cochlear structures |
| WO2020243956A1 (en) | 2019-06-06 | 2020-12-10 | Vincent Medical (Dong Guan) Manufacturing Co., Ltd. | Noise reduction device for respiratory apparatus |
| CN112764340A (en) * | 2019-10-21 | 2021-05-07 | 斯沃奇集团研究及开发有限公司 | Measuring system for a plurality of mechanical timepiece movements |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049894A (en) * | 1989-09-02 | 1991-03-13 | 林宏 | Spiral muffler |
| DE19715581C1 (en) * | 1997-04-15 | 1999-02-18 | Weinmann G Geraete Med | Air supply for fans of ventilation devices |
| DE19901780C1 (en) * | 1999-01-18 | 2000-05-25 | Map Gmbh | Blower for respirator has vane wheel with flow path having compressor stage between inlet and outlet and spiral opening in housing wall |
| CN2711392Y (en) * | 2004-06-25 | 2005-07-20 | 郗志强 | Multi-purpose machie for exhaust gas of truck |
-
2006
- 2006-05-19 CN CN200610080596A patent/CN100587804C/en not_active Ceased
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104732967A (en) * | 2013-10-29 | 2015-06-24 | 杨军 | Acoustic shielding screen for absorbing sound by using coplanar hollow tube |
| CN104732967B (en) * | 2013-10-29 | 2020-06-16 | 杨军 | Sound absorption screen for absorbing sound by using coplanar hollow tube |
| CN105369490A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Sound-attenuation dustproof cover for air suction device of sewing machine |
| CN105736480B (en) * | 2016-04-28 | 2020-06-02 | 深圳市大雅医疗技术有限公司 | Small fan, air inlet noise reduction device thereof and breathing machine adopting fan |
| CN105736480A (en) * | 2016-04-28 | 2016-07-06 | 深圳市大雅医疗技术有限公司 | Small fan, air inlet denoising device thereof and respirator adopting same |
| CN106345025A (en) * | 2016-11-18 | 2017-01-25 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN106422012A (en) * | 2016-11-18 | 2017-02-22 | 泰锐菲克（天津）医疗科技有限公司 | Amortization cover and breathing machine |
| CN106730203A (en) * | 2016-12-28 | 2017-05-31 | 北京怡和嘉业医疗科技股份有限公司 | For the noise-decreasing device and lung ventilator of lung ventilator |
| CN106730203B (en) * | 2016-12-28 | 2021-05-18 | 北京怡和嘉业医疗科技股份有限公司 | Noise reduction device for breathing machine and breathing machine |
| CN107424597A (en) * | 2017-09-06 | 2017-12-01 | 无锡市拓发自控设备有限公司 | Safety-type oil-collecting formula muffler |
| CN108279579A (en) * | 2017-12-18 | 2018-07-13 | 西北工业大学 | A kind of Large Underwater platform noise reduction system with class cochlear structures |
| WO2020243956A1 (en) | 2019-06-06 | 2020-12-10 | Vincent Medical (Dong Guan) Manufacturing Co., Ltd. | Noise reduction device for respiratory apparatus |
| CN113365681A (en) * | 2019-06-06 | 2021-09-07 | 东莞永胜医疗制品有限公司 | Noise reduction device for breathing apparatus |
| CN113365681B (en) * | 2019-06-06 | 2023-11-07 | 东莞永胜医疗制品有限公司 | Noise reduction device for breathing equipment |
| CN112764340A (en) * | 2019-10-21 | 2021-05-07 | 斯沃奇集团研究及开发有限公司 | Measuring system for a plurality of mechanical timepiece movements |
Also Published As
| Publication number | Publication date |
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| CN100587804C (en) | 2010-02-03 |
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Decision date of declaring invalidation: 20141201 Decision number of declaring invalidation: 24479 Granted publication date: 20100203 |