CN104343746A - Blowing-suction machine - Google Patents
Blowing-suction machine Download PDFInfo
- Publication number
- CN104343746A CN104343746A CN201310313765.6A CN201310313765A CN104343746A CN 104343746 A CN104343746 A CN 104343746A CN 201310313765 A CN201310313765 A CN 201310313765A CN 104343746 A CN104343746 A CN 104343746A
- Authority
- CN
- China
- Prior art keywords
- suction machine
- hush pipe
- outer tube
- pipe
- inner chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
Abstract
The invention discloses a blowing-suction machine. The blowing-suction machine comprises a casing, a motor, a fan, an outer pipe, a silencing pipe and a connecting pipe, wherein the casing is provided with an inner cavity, the motor is arranged in the inner cavity, the fan is in transmission connection with the motor; and the outer pipe, the silencing pipe and the connecting pipe are provided with inner cavities respectively. The silencing pipe is arranged in the inner cavity of the outer pipe and located on a propagation path of noise sound waves when the blowing-suction machine works; when the blowing-suction machine works, the silencing pipe can weaken strength of the noise sound waves in propagation, the specific weakening modes comprise absorption, diffraction and reflection, and the working noise of the blowing-suction machine is reduced.
Description
Technical field
The present invention relates to a kind of suction machine, particularly relate to a kind of suction machine that can reduce operating noise.
Background technique
Possess blowing to have a wide range of applications in life with the electric tool of air draught two kinds of functions, such as, in the foliage pressure-vacuum machine in garden instrument field, this suction machine is mainly used in cleaning and the arrangement of fallen leaves.Fallen leaves on the ground both can be blown away by blowing function by user, also will be able to be fallen leaves in inspiration garbage can by air suction function.But the problem that this suction machine has common needs to solve, noise when working exactly is excessive, can not be suitable for the demand of all users.
About the solution of noise problem, involved by also having in prior art.Comparatively conventional a kind of thinking is main sound source and Main Factors thereof according to producing noise, revises the structural design of product.But the promotion effect of this thinking is also bad, traces it to its cause, being that the vibration frequency of its sound wave is different because the sound source producing noise has a variety of, if yield to the difference of sound source by the structure revising product, has been exactly so the situation of putting the cart before the horse; Meanwhile, the key point of suction machine noise in propagation process is not caught in this amendment, can increase cost during design on the contrary, reduces the success rate of amendment product.
Summary of the invention
The object of this invention is to provide a kind of suction machine that can reduce operating noise.
For achieving the above object, the technical solution used in the present invention is: a kind of suction machine, comprise the housing with inner chamber, be located at the motor in described inner chamber, the fan be in transmission connection on described motor output shaft, described housing offers the first connecting port and the second connecting port, described first connecting port, described second connecting port respectively with the intracavity inter-connection of described housing, described suction machine also comprises the outer tube be connected to by connecting tube on described second connecting port, also hush pipe is provided with in the inner chamber of described outer tube, described hush pipe has the mouth of pipe run through vertically, the intracavity inter-connection of the described mouth of pipe and described housing.
Preferably, have gap between the external circumferential wall of described hush pipe and the inner circumferential wall of described outer tube, the external circumferential wall of described hush pipe is provided with multiple noise reduction hole, and each described noise reduction hole is communicated with described outer tube bore and described hush pipe inner chamber.
Further preferably, described noise reduction hole is distributed in described hush pipe circumferential side wall at intervals.
Preferably, described hush pipe comprises the first body be located in vertically in described outer tube bore, has gap, be filled with quieter material in described gap between the external circumferential wall of described first body and the inner circumferential wall of described outer tube.
Further preferably, quieter material is filled up in described gap.
Preferably, described fan is centrifugal fan.
Due to the utilization of technique scheme, the present invention compared with prior art has following advantages: described suction machine have employed and uses hush pipe to carry out the technological scheme of noise reduction in the way of Acoustic Wave Propagation, effectively can reduce suction machine noise decibels operationally, hush pipe simultaneously in two kinds of embodiments is structurally all convenient to processing, compared to noise-reduction method of the prior art, greatly reduce cost, simultaneously very little on the service behaviour impact of suction machine itself.
Accompanying drawing explanation
Accompanying drawing 1 is the sectional view of suction machine of the present invention;
Accompanying drawing 2 is the structural representation of suction machine first embodiment of the present invention;
Accompanying drawing 3 is the sectional view of suction machine first embodiment's hush pipe of the present invention and outer tube;
Accompanying drawing 4 is the structural representation of suction machine second embodiment of the present invention;
Accompanying drawing 5 is the sectional view of suction machine second embodiment's hush pipe of the present invention and outer tube.
Wherein: 1-housing, 2-housing cavity, 3-motor, 4-motor pivot, 5-fan, 6-first connecting port, 7-second connecting port, 8-connecting tube, 9-outer tube, 10-hush pipe, 11-hush pipe inner chamber, 12-hollow layer, 13-noise reduction hole, 14-quieter material, 15-first body; 91-first assembles outer tube, and 92-second assembles outer tube.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technological scheme of the present invention is further elaborated.
Accompanying drawing 1 is the sectional view of suction machine of the present invention.Described suction machine has shell 1, and shell 1 has housing cavity 2, and described housing cavity 2 is for holding the assembly of power section.The assembly of described power section comprises motor 3, motor pivot 4, fan 5, and fan 5 is connected with motor 3 by motor pivot 4, and fan 5 preferably adopts centrifugal blades, better axial wind can be converted into footpath aweather like this, improves the effect of pressure-vaccum; Housing 1 offers the first connecting port 6 and the second connecting port 7, this two places connecting port is all for being communicated with housing cavity 2 with extraneous; Be provided with connecting tube 8 in the side of housing simultaneously.Presented in fig. 1 is the blowing function of suction machine of the present invention, arrow represents the direction that air flows, can find out, when motor 3 drives fan 5 to rotate, by the air in the external world from the first connecting port 6 suction casing inner chamber, radially can go out through passing through fan 5 is backward, thus the air of flowing moved to the direction of the second connecting port 7, second connecting port 7 is communicated with connecting tube 8, and connecting tube 8 is communicated with outer tube 9 again; Be provided with hush pipe 10 in the inside of outer tube 9, hush pipe 10 is provided with hush pipe inner chamber 11, and hush pipe inner chamber 11 one end is communicated with housing cavity 2 by connecting tube 8, and the other end is directly in communication with the outside.
About the concrete form of hush pipe, the invention provides two kinds of embodiments, accompanying drawing 2-3 is the first embodiment, and accompanying drawing 4-5 is the second embodiment.
Accompanying drawing 2 is the structural representation of suction machine first embodiment of the present invention, and accompanying drawing 3 is the sectional view of hush pipe 10 and outer tube 9 in suction machine first embodiment of the present invention.Hush pipe 10 is provided with in outer tube 9 inner chamber, its middle external tube 9 preferably uses the manufacture method of half of depanning, namely produce the first assembling outer tube 91 and second and assemble outer tube 92, by screw, two halves are assembled outer tube and be connected to form complete outer tube 9, be so also convenient to the clean of hush pipe 10 and change; The external diameter of hush pipe 10 is obviously little than the internal diameter of outer tube 9, can form gap like this between the inner chamber of outer tube 9 and hush pipe 10, and this gap is hollow layer 12, can cushion sound wave, is conducive to alleviating of noise; Hush pipe 10 has hush pipe inner chamber 11, the tube wall of hush pipe 10 offers multiple noise reduction hole 13, is communicated with described hush pipe inner chamber 11 and outward appearance inner chamber, is also namely communicated with hollow layer 12; Preferably, these noise reduction hole 13 proper alignment, spread all over the tube wall of whole hush pipe 10;---housing cavity---the air communication channel of the second connecting port---connecting tube---hush pipe inner chamber that because the other end of described hush pipe inner chamber 11 is in communication with the outside, the inside of whole suction machine just defines the first connecting port.
When user's starting electrical machinery uses the blowing function of this suction machine, by the air intake housing cavity 2 in the external world after fan 5 rotates, air is flow in hush pipe inner chamber 11 by connecting tube 8 by centrifugal fan blades subsequently.Because sound wave propagates along the bearing of trend of hush pipe inner chamber 11, and the tube wall of hush pipe 10 offering many and close noise reduction hole 13, when being delivered to 13 place, noise reduction hole, can there is the phenomenon of diffraction and reflection in sound wave.Sound wave is after producing diffraction by a large amount of noise reduction hole 13, and a part enters hollow layer, and the intensity of acoustic wave spread out of from hush pipe inner chamber 11 is obviously weakened; And due to the bearing of trend in noise reduction hole 13 itself be vertical with sound direction of wave travel, reflection will inevitably be produced by some sound wave after the hole wall touching noise reduction hole 13, offset with a part of sound wave propagated according to former direction.In like manner, when using air suction function, for the parts reducing noise, be only change of the wind, on noise reduction of the present invention without any impact.
Accompanying drawing 4 is the structural representation of suction machine second embodiment of the present invention, and accompanying drawing 5 is the sectional view of hush pipe 10 and outer tube 9 in suction machine second embodiment of the present invention.With the first embodiment unlike, hush pipe 10 is here made up of quieter material 14 and the first body 15.First body 15 does not offer noise reduction hole as the first embodiment, and quieter material 14 is filled between the first body 15 and outer tube 9, and preferably, quieter material 14 fills up above-mentioned gap.Like this when Acoustic Wave Propagation is to hush pipe 10 li, can directly be absorbed by quieter material 14 or weaken, reach effect of noise reduction.
In fact, wanting to weaken sound wave intensity, is exactly nothing but three kinds of schemes: 1, weaken at sound source place; 2, weaken in propagation process; 3, weaken at Ren Erchu.In field of power tools, may be only select in first two scheme, the scheme wherein weakened at sound source place is owing to can reach the effect of " effecting a permanent cure ", thus often as first-selected, but the scheme of this direct weakening sound source must relate to the change to electric tool product structure, cycle of often revising is very long, and success rate is low.Present invention employs the second thinking, prove through overtesting and market survey, the technological scheme in the present invention not only can make sound pressure level narrow band noise reduce by 5 ~ 8dB, and acoustic radiating quality trend wideband, user obviously degree of feeling comfortably cool improves, and performance impact is within 3% simultaneously.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (6)
1. a suction machine, comprise the housing with inner chamber, be located at the motor in described inner chamber, the fan be in transmission connection on described motor output shaft, described housing offers the first connecting port and the second connecting port, described first connecting port, described second connecting port respectively with the intracavity inter-connection of described housing, described suction machine also comprises the outer tube be connected to by connecting tube on described second connecting port, it is characterized in that: in the inner chamber of described outer tube, be also provided with hush pipe, described hush pipe has the mouth of pipe run through vertically, the intracavity inter-connection of the described mouth of pipe and described housing.
2. suction machine according to claim 1, it is characterized in that: between the external circumferential wall of described hush pipe and the inner circumferential wall of described outer tube, there is gap, the external circumferential wall of described hush pipe is provided with multiple noise reduction hole, and each described noise reduction hole is communicated with described outer tube bore and described hush pipe inner chamber.
3. suction machine according to claim 2, is characterized in that: described noise reduction hole is distributed in described hush pipe circumferential side wall at intervals.
4. suction machine according to claim 1, it is characterized in that: described hush pipe comprises the first body be located in vertically in described outer tube bore, between the external circumferential wall of described first body and the inner circumferential wall of described outer tube, there is gap, in described gap, be filled with quieter material.
5. suction machine according to claim 4, is characterized in that: fill up quieter material in described gap.
6. suction machine according to claim 1, is characterized in that: described fan is centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313765.6A CN104343746A (en) | 2013-07-24 | 2013-07-24 | Blowing-suction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313765.6A CN104343746A (en) | 2013-07-24 | 2013-07-24 | Blowing-suction machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104343746A true CN104343746A (en) | 2015-02-11 |
Family
ID=52500027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310313765.6A Pending CN104343746A (en) | 2013-07-24 | 2013-07-24 | Blowing-suction machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104343746A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269550A (en) * | 2017-06-16 | 2017-10-20 | 宁波大叶园林设备股份有限公司 | Have lithium battery drive motor ring Zhou Binglie filtering muffling air ducts blows leaf machine |
| CN113027825A (en) * | 2021-04-19 | 2021-06-25 | 深圳市贵庭机电设备有限公司 | Fire control smoke exhaust fan export noise eliminator |
| US11434929B2 (en) | 2019-08-02 | 2022-09-06 | Techtronic Cordless Gp | Blowers having noise reduction features |
| US11778960B2 (en) | 2020-01-21 | 2023-10-10 | Techtronic Cordless Gp | Blowers |
| US11817073B2 (en) | 2020-01-21 | 2023-11-14 | Techtronic Cordless Gp | Power tool having noise reduction features |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02188700A (en) * | 1989-01-17 | 1990-07-24 | Matsushita Electric Works Ltd | Blower |
| CN1684139A (en) * | 2004-04-13 | 2005-10-19 | 费斯托合资公司 | Silencing unit |
| CN101514649A (en) * | 2009-03-24 | 2009-08-26 | 彩虹彩色显像管总厂 | Muffler |
| CN102296555A (en) * | 2011-05-24 | 2011-12-28 | 宁波大叶园林设备有限公司 | Improvement on low-vibration leaf blowing and absorbing machine |
| CN102369359A (en) * | 2009-01-30 | 2012-03-07 | 伊顿公司 | Broadband noise resonator |
| CN102852109A (en) * | 2012-05-04 | 2013-01-02 | 江苏苏美达五金工具有限公司 | Air sucking and blowing machine with air inlet valve structure |
| CN102852107A (en) * | 2012-05-04 | 2013-01-02 | 江苏苏美达五金工具有限公司 | Handheld air sucking and blowing machine with sound-blocking cone of air suction tube |
-
2013
- 2013-07-24 CN CN201310313765.6A patent/CN104343746A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02188700A (en) * | 1989-01-17 | 1990-07-24 | Matsushita Electric Works Ltd | Blower |
| CN1684139A (en) * | 2004-04-13 | 2005-10-19 | 费斯托合资公司 | Silencing unit |
| CN102369359A (en) * | 2009-01-30 | 2012-03-07 | 伊顿公司 | Broadband noise resonator |
| CN101514649A (en) * | 2009-03-24 | 2009-08-26 | 彩虹彩色显像管总厂 | Muffler |
| CN102296555A (en) * | 2011-05-24 | 2011-12-28 | 宁波大叶园林设备有限公司 | Improvement on low-vibration leaf blowing and absorbing machine |
| CN102852109A (en) * | 2012-05-04 | 2013-01-02 | 江苏苏美达五金工具有限公司 | Air sucking and blowing machine with air inlet valve structure |
| CN102852107A (en) * | 2012-05-04 | 2013-01-02 | 江苏苏美达五金工具有限公司 | Handheld air sucking and blowing machine with sound-blocking cone of air suction tube |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269550A (en) * | 2017-06-16 | 2017-10-20 | 宁波大叶园林设备股份有限公司 | Have lithium battery drive motor ring Zhou Binglie filtering muffling air ducts blows leaf machine |
| CN107269550B (en) * | 2017-06-16 | 2019-08-13 | 宁波大叶园林设备股份有限公司 | Tool lithium battery drive motor ring Zhou Binglie filtering muffling air duct blows leaf machine |
| US11434929B2 (en) | 2019-08-02 | 2022-09-06 | Techtronic Cordless Gp | Blowers having noise reduction features |
| US11841023B2 (en) | 2019-08-02 | 2023-12-12 | Techtronic Cordless Gp | Blowers having noise reduction features |
| US11778960B2 (en) | 2020-01-21 | 2023-10-10 | Techtronic Cordless Gp | Blowers |
| US11817073B2 (en) | 2020-01-21 | 2023-11-14 | Techtronic Cordless Gp | Power tool having noise reduction features |
| CN113027825A (en) * | 2021-04-19 | 2021-06-25 | 深圳市贵庭机电设备有限公司 | Fire control smoke exhaust fan export noise eliminator |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150211 |