CN106949099A - Dust catcher motor air pump - Google Patents
Dust catcher motor air pump Download PDFInfo
- Publication number
- CN106949099A CN106949099A CN201710292224.8A CN201710292224A CN106949099A CN 106949099 A CN106949099 A CN 106949099A CN 201710292224 A CN201710292224 A CN 201710292224A CN 106949099 A CN106949099 A CN 106949099A
- Authority
- CN
- China
- Prior art keywords
- hood
- discharge duct
- dust catcher
- air pump
- blower
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 24
- 239000010410 layer Substances 0.000 claims description 26
- 239000002250 absorbent Substances 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/02—Structural features of suction cleaners with user-driven air-pumps or compressors
- A47L5/06—Structural features of suction cleaners with user-driven air-pumps or compressors with rotary fans
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Electric Suction Cleaners (AREA)
Abstract
A kind of dust catcher motor air pump, including：Provided with the first opening at the top of admission line, the admission line, the admission line bottom is provided with the second opening；Blower hood, the blower hood bottom is provided with the 3rd opening；Blower fan, the blower fan is to the 3rd opening direction air-out；And discharge duct, its main body is into helical structure, the discharge duct is externally provided with the hood coated entirely, the hood first end closing, the discharge duct first end is through the hood first end and the blower hood the 3rd opening airtight connection, the end of hood second is opened wide, the hood inner space is divided into some closed cushion chambers by dividing plate, second end of the discharge duct sequentially passes through the dividing plate, and drawn from the end of hood second, offer some through holes being evenly arranged on the discharge duct tube wall in the hood.The present invention can effectively reduce dust catcher air pump noise.
Description
Technical field
The present invention relates to cleaner field, more particularly to a kind of dust catcher motor air pump.
Background technology
Since dust catcher invention, its noise is always to perplex the old problem that people use.Noise source is broadly divided at two,
One is that dust catcher is produced after air negative pressure, and air is inhaled into, and air is during quick flowing, and compression, expansion are touched with body
Hit etc. and constantly to produce sound wave, two be that motor rotates the mechanical oscillation caused and passes through airborne sound wave in dust catcher.
In order to obtain more powerful suction, the power requirement of dust catcher is also bigger, and corresponding noise problem is also
When the river rises the boat goes up therewith.If unilaterally pursuing powerful suction, power of motor is improved simply, and result is produced vacuum cleaner noise
Too big, user can not only be complained by other people, and its excessive noise can not be all born even with person.
The content of the invention
It is an object of the invention to solve at least the above or defect, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of dust catcher motor air pump.
Therefore, the technical scheme that the present invention is provided is：
A kind of dust catcher motor air pump, including：
Admission line, it is provided with the first opening, the admission line bottom at the top of round platform shell structure, the admission line
Portion is provided with the second opening；
Blower hood, it is cylindrical shell structure, and the blower hood open top is open with the admission line second
Airtight connection, the blower hood bottom is provided with the 3rd opening；
Blower fan, it is arranged in blower hood, and the blower fan passes through solid to the 3rd opening direction air-out, the blower fan
Determine frame to be connected with the blower hood inwall；And
Discharge duct, its main body is into helical structure, and the discharge duct is externally provided with the hood coated entirely, the hood
First end is closed, and the discharge duct first end is open closed through the hood first end and with the blower hood the 3rd
Connection, the end of hood second is opened wide, and the hood inner space is divided into some closed cushion chambers, the row by dividing plate
Second end of feed channel sequentially passes through the dividing plate, and is drawn from the end of hood second, the row in the hood
Some through holes being evenly arranged are offered on feed channel tube wall.
Preferably, the admission line includes：
Some the first evenly distributed blind holes are offered on internal layer, its inwall；
Outer layer, it, which is fitted, is set on the outside of the internal layer.
Preferably, the admission line also includes some fuisw ribs, its be arranged on the internal layer inwall to institute
The arcuate structure of the second opening spiral stream guidance is stated, the fuisw rib first end is arranged at the top of the admission line, the water conservancy diversion
The end of muscle second is arranged on the admission line bottom, and the fuisw rib and the bus angle of the round platform shell structure be 5 degree~
30 degree.
Preferably, the hand of spiral and the blower fan direction of rotation of the fuisw rib to the described second opening spiral stream guidance
Unanimously.
Preferably, the blower hood is made up of shell, sound insulating layer and absorbent treatment, and the sound insulating layer is outside the blower fan
The most inner side of cover, the sound insulating layer is made up of reflection sound wave material, and the absorbent treatment is arranged on the interlayer of the shell, sound insulating layer
In, the absorbent treatment is absorption sound wave material.
Preferably, the hood inwall offers some the second evenly distributed blind holes, the dividing plate upper and lower surface
Offer some the 3rd evenly distributed blind holes.
Preferably, the discharge duct tube wall in the cushion chamber where the end of hood second does not open up institute
State through hole.
Preferably, the discharge duct also includes micropole diffusor, the micropole diffusor air inlet and the exhaust
The insertion of pipeline afterbody is connected, and the center spacing of adjacent apertures is more than 5 times of the hole diameter on the micropole diffusor.
Preferably, the discharge duct diameter is equal with the opening diameter of blower hood the 3rd.
Preferably, first end of the volume of some cushion chambers along discharge duct to the second extreme direction compares according to grade
Ordered series of numbers reduces, and proportionality coefficient is 0.5~0.7.
The present invention at least includes following beneficial effect：
1. discharge duct of the present invention has been increased substantially muffler space by helical structure；
2. the present invention converts acoustic energy into heat energy by the through hole, blind hole, the purpose of sound deadening shock absorption is reached；
3. the present invention weakens air-flow acoustic energy step by step by the cushion chamber；
4. the middle low-frequency sound not eliminated is converted into by the present invention by the micropole diffusor does not influence the high frequency of human ear
Sound；
5. the present invention reflects acoustic energy at motor by the blower hood, it is ensured that the overall Jing Yin performance of air pump.
Brief description of the drawings
Fig. 1 is dust catcher motor air pump three-dimensional sectional schematic diagram of the present invention；
Fig. 2 is the schematic three dimensional views of aperture sound absorber of the present invention.
Embodiment
Below by embodiment, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
It should be appreciated that used herein such as " have ", "comprising" and " comprising " term are not precluded from one or many
The presence or addition of individual other elements or its combination.
Embodiment one
As shown in figure 1, a kind of dust catcher motor air pump, including：Admission line 1, its be round platform shell structure, it is described enter
The top of feed channel 1 is provided with the first opening, and the bottom of admission line 1 is provided with the second opening；Blower hood 2, it is cylindrical shell
Structure, the open top of blower hood 2 and the admission line 1 second opening airtight connection, the bottom of blower hood 2 is set
There is the 3rd opening；Blower fan 3, it is arranged in blower hood 2, and the blower fan 3 is to the 3rd opening direction air-out, the blower fan
3 are connected by fixed mount with the inwall of blower hood 2；And discharge duct 4, its main body is into helical structure, the blast pipe
Road 4 is externally provided with the hood 5 coated entirely, and the first end of hood 5 closing, the first end of discharge duct 4 runs through the row
The first end of gas hood 5 and with the blower hood 2 the 3rd be open airtight connection, the end of hood 5 second open wide, the hood
6 points by dividing plate of 5 inner spaces are some closed cushion chambers, and the second end of the discharge duct 4 sequentially passes through the dividing plate 6,
And drawn from the end of hood 5 second, offer some uniform cloth on the tube wall of the discharge duct 4 in the hood 5
The through hole put.
Air-flow enters the admission line 1 from the described first opening, because the round platform housing of the admission line 1 gradually expands
The structure opened, the speed of air-flow can be buffered, while the collision of air-flow and the inwall of admission line 1 during air inlet is reduced,
So as to reduce the airflow kinetic energy loss and the generation of sound wave during air inlet.The discharge duct 4 is set by the through hole thereon
Put, realize the board-like acoustic resistance structure of micropunch, air-flow enters the cushion chamber after the admission line 1 by the through hole,
Airstream vibration energy is converted into heat energy, when air-flow is again introduced into the discharge duct 4 from the cushion chamber, again by air-flow
Vibrational energy is converted to heat energy.Air-flow is constantly passed in and out between the discharge duct 4 and the hood 5, fully by air-flow
Vibrational energy conversion thermal energy so that noise reduction.Micropunch plank frame has the advantages that cleaning, high temperature resistant, airflow impact, non-
Often it is adapted to the working environment of dust catcher air pump.
The admission line 1 includes：Some the first evenly distributed blind holes are offered on internal layer, its inwall；Outer layer, it is pasted
Trap is located on the outside of the internal layer.The blind hole plays the blocking effect to air-flow acoustic energy, and gas rubs at the blind hole, from
And acoustic energy is converted into heat energy.
The admission line 1 also includes some fuisw ribs, and it is to be arranged on being opened to described second on the internal layer inwall
The arcuate structure of mouth spiral stream guidance, the fuisw rib first end is arranged on the top of admission line 1, the end of fuisw rib second
The bottom of admission line 1 is arranged on, the fuisw rib and the bus angle of the round platform shell structure are 5 degree~30 degree.Institute
State fuisw rib and make it that the air-flow of suction rotates according to its hand of spiral, the air-flow of rotation is more stable, reduces air-flow and air pump
Collision.
The hand of spiral of the fuisw rib to the described second opening spiral stream guidance is consistent with the direction of rotation of blower fan 3, such as
This, the kinetic energy for the direction of rotation that air flow is guided by the fuisw rib will not be cancelled when entering the blower fan 3, so that
The blower fan 3 is avoided to flog a dead horse.
The blower hood 2 is made up of shell, sound insulating layer and absorbent treatment, the sound insulating layer in the blower hood 2 most
Inner side, the sound insulating layer is made up of reflection sound wave material, and the absorbent treatment is arranged in the interlayer of the shell, sound insulating layer, institute
Absorbent treatment is stated to absorb sound wave material.Substantial amounts of wind energy is produced at the blower fan 3 simultaneously, inevitably can also supervene sound
Can, wind energy and acoustic energy are just separated into processing at the blower fan 3, it is very difficult to realize, because substantially wind energy and acoustic energy
It is a kind of energy.Current technology means are all often, by improving motor, to be cut down and made an uproar from source by the motor of low noise
The generation of sound.By being arranged on the sound insulating layer reflection sound wave of the blower hood 2 most inner side in the present embodiment, by the wind
Controlled at machine 3 to the acoustic energy of surrounding loss inside the blower fan 3, to the not reflectible sound wave of the sound insulating layer then by described
Absorbent treatment further absorbs, and takes this so that the noise at the blower fan 3 all arrives effective control.
The inwall of hood 5 offers some the second evenly distributed blind holes, and the upper and lower surface of dividing plate 6 is offered
Some the 3rd evenly distributed blind holes.Pass through the setting of second blind hole, the 3rd blind hole so that the sound wave of the cushion chamber exists
During constantly reflecting, acoustic energy is constantly converted into heat energy.
The diameter of discharge duct 4 is equal with the opening diameter of blower hood 2 the 3rd.As shown in Fig. 2 the row at this
Feed channel 4 is in smoothing junction by an a quarter ring tube and the blower hood 2 the 3rd opening, and such transition, air-flow exists
By the blower hood 2 enter the discharge duct 4 when will not vertical impact on the tube wall of discharge duct 4, also just reduce
The generation of noise.
First end of the volume of some cushion chambers along discharge duct 4 to the second extreme direction subtracts according to Geometric Sequence
Small, proportionality coefficient is 0.5~0.7.Although the discharge duct 4, hood 5 can complete noise elimination function, noise elimination process
In unavoidably have noise loss and go out, in order to ensure that the noises of these loss, into puzzlement, is also accomplished by entrance not to artificial
The enough attenuating space of air-flow.And for the higher air-flow of acoustic energy, it is necessary to attenuating space it is also bigger.Air-flow enters just
During the discharge duct 4, the acoustic energy having is maximum, after the energy attenuation of the discharge duct 4 and the cushion chamber, gas
Stream acoustic energy can weaken step by step.In this regard, also just there is a relation diminished step by step in correspondence to the volume size of the cushion chamber.According to
The cushion chamber acoustic attenuation performance different from the discharge duct 4, the Volume Changes proportionality coefficient of the cushion chamber is also different
's.
Embodiment two
The tube wall of the discharge duct 4 in the cushion chamber where the end of hood 5 second does not open up the through hole.
As shown in Fig. 2 the discharge duct 4 also include micropole diffusor 7, the air inlet of micropole diffusor 7 with it is described
The afterbody insertion of discharge duct 4 is connected, and the center spacing of adjacent apertures 71 is the 5 of the diameter of aperture 71 on the micropole diffusor
More than times.The cushion chamber where the end of hood 5 second, i.e., the tail end cushion chamber that air-flow is finally flowed through, the tail end
The tube wall of discharge duct 4 in cushion chamber does not open up the through hole, then air-flow will be arranged by the afterbody of the discharge duct 4 completely
Go out.By connecting a micropole diffusor 7 in the afterbody of discharge duct 4, by the noise for the middle low frequency retained in air-flow
The non-audible high-frequency sound of human ear is converted into, so as to reach noise reduction purpose.When the spacing of aperture 71 is sufficiently large, aperture 71 is last
The pneumatic noise of convergence just will not be big.
In summary, discharge duct 4 of the present invention has been increased substantially muffler space by helical structure；The present invention is logical
Cross the through hole, blind hole and convert acoustic energy into heat energy, reach the purpose of sound deadening shock absorption；The present invention is subtracted step by step by the cushion chamber
Weak air-flow acoustic energy；The middle low-frequency sound not eliminated is converted into by the present invention by the micropole diffusor 7 does not influence the height of human ear
Frequency sound；The present invention reflects acoustic energy at motor by the blower hood 2, it is ensured that the overall Jing Yin performance of air pump.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With.It can be applied to various suitable the field of the invention completely., can be easily for those skilled in the art
Realize other modification.Therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (10)
1. a kind of dust catcher motor air pump, it is characterised in that including：
Admission line, it is that the admission line bottom is set provided with the first opening at the top of round platform shell structure, the admission line
There is the second opening；
Blower hood, it is cylindrical shell structure, and the blower hood open top is open closed with the admission line second
Connection, the blower hood bottom is provided with the 3rd opening；
Blower fan, it is arranged in blower hood, and the blower fan passes through fixed mount to the 3rd opening direction air-out, the blower fan
It is connected with the blower hood inwall；And
Discharge duct, its main body is into helical structure, and the discharge duct is externally provided with the hood coated entirely, the hood first
End seal is closed, and the discharge duct first end is open closed company through the hood first end and with the blower hood the 3rd
Connect, the end of hood second is opened wide, and the hood inner space is divided into some closed cushion chambers, the exhaust by dividing plate
Second end of pipeline sequentially passes through the dividing plate, and is drawn from the end of hood second, the exhaust in the hood
Some through holes being evenly arranged are offered on pipe wall.
2. dust catcher according to claim 1 motor air pump, it is characterised in that the admission line includes：
Some the first evenly distributed blind holes are offered on internal layer, its inwall；
Outer layer, it, which is fitted, is set on the outside of the internal layer.
3. dust catcher according to claim 2 motor air pump, it is characterised in that the admission line also includes some lead
Muscle is flowed, it is the arcuate structure to the described second opening spiral stream guidance being arranged on the internal layer inwall, the fuisw rib the
One end is arranged at the top of the admission line, and the end of fuisw rib second is arranged on the admission line bottom, the fuisw rib
Bus angle with the round platform shell structure is 5 degree~30 degree.
4. dust catcher according to claim 3 motor air pump, it is characterised in that the fuisw rib is open to described second
The hand of spiral of spiral stream guidance is consistent with the blower fan direction of rotation.
5. dust catcher according to claim 1 motor air pump, it is characterised in that the blower hood is by shell, sound insulation
Layer is constituted with absorbent treatment, and the sound insulating layer is made up in the most inner side of the blower hood, the sound insulating layer of reflection sound wave material,
The absorbent treatment is arranged in the interlayer of the shell, sound insulating layer, and the absorbent treatment is absorption sound wave material.
6. dust catcher according to claim 1 motor air pump, it is characterised in that the hood inwall offers some
The second evenly distributed blind hole, the dividing plate upper and lower surface offers some the 3rd evenly distributed blind holes.
7. dust catcher according to claim 1 motor air pump, it is characterised in that the institute where the end of hood second
The discharge duct tube wall stated in cushion chamber does not open up the through hole.
8. dust catcher according to claim 7 motor air pump, it is characterised in that the discharge duct also disappears including aperture
Sound device, the micropole diffusor air inlet is connected with the discharge duct afterbody insertion, adjacent apertures on the micropole diffusor
Center spacing be more than 5 times of the hole diameter.
9. dust catcher according to claim 8 motor air pump, it is characterised in that the discharge duct diameter and the wind
The opening diameter of machine outer cover the 3rd is equal.
10. dust catcher according to claim 1 motor air pump, it is characterised in that the volume edge of some cushion chambers
First end to the second extreme direction for discharge duct reduces according to Geometric Sequence, and proportionality coefficient is 0.5~0.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292224.8A CN106949099B (en) | 2017-04-28 | 2017-04-28 | Dust catcher motor air pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292224.8A CN106949099B (en) | 2017-04-28 | 2017-04-28 | Dust catcher motor air pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106949099A true CN106949099A (en) | 2017-07-14 |
| CN106949099B CN106949099B (en) | 2019-05-10 |
Family
ID=59477036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710292224.8A Expired - Fee Related CN106949099B (en) | 2017-04-28 | 2017-04-28 | Dust catcher motor air pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106949099B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404343A (en) * | 2018-10-12 | 2019-03-01 | 意诺科技有限公司 | A kind of silencing means, sound-attenuating system and cleaning equipment |
| CN111442516A (en) * | 2020-05-08 | 2020-07-24 | 西安艾科特声学科技有限公司 | A air exchange system noise control device for in low noise room |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239228Y (en) * | 1994-11-22 | 1996-11-06 | 王荆江 | Super-clean vacuum duster |
| CN2261226Y (en) * | 1995-12-08 | 1997-09-03 | 刘中国 | Miniature vacuum cleaner for household electric appliance |
| CN2308337Y (en) * | 1997-10-15 | 1999-02-24 | 戴吉元 | Resistance-free directional dust-removing household duster |
| EP1161915A2 (en) * | 2000-04-18 | 2001-12-12 | Vorwerk & Co. Interholding GmbH | Air flow channel |
| CN201202514Y (en) * | 2008-06-12 | 2009-03-04 | 楚杏芬 | Automobile silencer |
| CN202117850U (en) * | 2011-05-25 | 2012-01-18 | 江苏聚源风电科技有限公司 | Fluid energy boosting and conversion device |
-
2017
- 2017-04-28 CN CN201710292224.8A patent/CN106949099B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239228Y (en) * | 1994-11-22 | 1996-11-06 | 王荆江 | Super-clean vacuum duster |
| CN2261226Y (en) * | 1995-12-08 | 1997-09-03 | 刘中国 | Miniature vacuum cleaner for household electric appliance |
| CN2308337Y (en) * | 1997-10-15 | 1999-02-24 | 戴吉元 | Resistance-free directional dust-removing household duster |
| EP1161915A2 (en) * | 2000-04-18 | 2001-12-12 | Vorwerk & Co. Interholding GmbH | Air flow channel |
| CN201202514Y (en) * | 2008-06-12 | 2009-03-04 | 楚杏芬 | Automobile silencer |
| CN202117850U (en) * | 2011-05-25 | 2012-01-18 | 江苏聚源风电科技有限公司 | Fluid energy boosting and conversion device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404343A (en) * | 2018-10-12 | 2019-03-01 | 意诺科技有限公司 | A kind of silencing means, sound-attenuating system and cleaning equipment |
| CN111442516A (en) * | 2020-05-08 | 2020-07-24 | 西安艾科特声学科技有限公司 | A air exchange system noise control device for in low noise room |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106949099B (en) | 2019-05-10 |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215163 No. 160 Keling Road, Suzhou High-tech Zone, Jiangsu Province Patentee after: Suzhou Haipeng Living Appliances Co.,Ltd. Address before: 215163 Suzhou 78 high tech Zone, Jiangsu Patentee before: SUZHOU HAIPENG ELECTRONIC COMMERCE Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190510 |