CN110131764A - Range hood and noise reduction structure thereof - Google Patents
Range hood and noise reduction structure thereof Download PDFInfo
- Publication number
- CN110131764A CN110131764A CN201910373257.4A CN201910373257A CN110131764A CN 110131764 A CN110131764 A CN 110131764A CN 201910373257 A CN201910373257 A CN 201910373257A CN 110131764 A CN110131764 A CN 110131764A
- Authority
- CN
- China
- Prior art keywords
- range hood
- sound
- partition
- absorbing
- main body
- 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
Links
- 230000009467 reduction Effects 0.000 title abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 64
- 239000000779 smoke Substances 0.000 claims description 31
- 239000011358 absorbing material Substances 0.000 claims description 27
- 238000009423 ventilation Methods 0.000 claims description 17
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 206010013082 Discomfort Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Abstract
The invention discloses a noise reduction structure of a range hood and the range hood, wherein the range hood comprises a range hood main body with an air inlet, an oil screen is arranged at the air inlet of the range hood main body, a fan is arranged in the range hood main body, a plurality of partition plates are arranged between the oil screen and the fan at intervals, a vent is arranged on each partition plate or a vent is formed between each partition plate and the side wall of the range hood main body, and the vent is arranged in a vertically staggered manner, so that the range hood has the functions of sound insulation and sound absorption, and the noise reduction effect of the range hood is further improved.
Description
Technical field
The present invention relates to kitchen appliance technical field more particularly to the denoising structures and range hood of a kind of range hood.
Background technique
Wind Volume, big suction concept are promoted mainly always in smoke machine market in recent years, with the raising that people require quality of the life,
User increasingly pays close attention to the size of smoke machine noise parameters, it may be said that the superiority and inferiority of smoke machine noiseproof feature is when choosing range hood
The big key factor of the one of product competitiveness.
In the related technology, the air quantity of range hood steps up, but its generated noise is also increasing.It is opened when culinary art
Opening will be barely audible voice, phone sound, doorbell sound and child's sound or even this strong noise after range hood and can make kitchen
Operator generates agitation, and headache, the adverse reactions such as palpitaition can be to people if the range hood of strong noise is used for a long time in people
Physical and mental health causes to seriously affect.Therefore noise becomes technical problem urgently to be resolved existing for existing range hood.
Summary of the invention
The present invention is directed to one of solve the problems, such as present in existing the relevant technologies at least to a certain extent, for this purpose, this hair
A kind of bright denoising structure for proposing range hood, structure is simple, and range hood can be made to have sound insulation and sound absorption function, Jin Erjin
The noise reduction effect of one step raising range hood.
In addition, design rationally, can effectively reduce caused by range hood the invention also provides a kind of range hood
Noise.
Above-mentioned first purpose is achieved by the following technical solution:
A kind of denoising structure of range hood, the range hood includes the smoke machine main body with air inlet, in the cigarette
The air inlet of owner's body is provided with oil network, is provided with blower in the smoke machine main body, the oil network and the blower it
Between be arranged at intervals with multiple partitions, ventilation opening is offered on the partition or in the side of the partition and the smoke machine main body
Ventilation opening, interlaced arrangement above and below the ventilation opening are formed between wall.
In some embodiments, sound-absorbing protrusion is provided on the partition.
In some embodiments, the sound-absorbing protrusion is hollow thin-wall construction, and the wall thickness of the sound-absorbing protrusion is
0.2mm to 1mm.
In some embodiments, sound-absorbing material is filled in the sound-absorbing protrusion.
In some embodiments, the density for the sound-absorbing material that the sound-absorbing protrusion the inside on every layer of partition is filled
It is different, the sound-absorbing material density on the partition is gradually increased from the oil network toward the direction of the blower.
In some embodiments, four layers of partition are disposed with from the oil network toward the direction of the blower,
Described in the sound-absorbing material density on first layer partition be 2 to 10kg/m3, the sound-absorbing material on second layer partition is close
Degree is 11 to 20kg/m3, the sound-absorbing material density on third layer partition is 25 to 35kg/m3, described on the 4th layer of partition
Sound-absorbing material density is 40 to 60kg/m3。
In some embodiments, the cross section of the sound-absorbing protrusion is in half elliptic.
In some embodiments, the width of the ventilation opening is 35mm to 65mm.
In some embodiments, the partition with a thickness of 0.2mm to 2mm.
Above-mentioned second purpose is achieved by the following technical solution:
A kind of range hood, including noise reducing structure for fume extractor described in any of the above-described embodiment.
Compared with prior art, of the invention to include at least the following beneficial effects:
1. the denoising structure of range hood of the present invention, structure is simple, and range hood can be made to have sound insulation and sound absorption function,
And then further increase the noise reduction effect of range hood.
2. it is designed rationally, the noise of high, normal, basic full frequency band caused by range hood can be absorbed, and then improved
The usage experience of user.
3. range hood of the invention, design rationally, can effectively reduce noise caused by range hood.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the denoising structure of range hood in the embodiment of the present invention；
Fig. 2 is the sectional view of the denoising structure of range hood in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of sound-absorbing protrusion in the embodiment of the present invention.
Specific embodiment
The present invention will be described for following embodiment, but the present invention is not limited to these examples system.To of the invention
Specific embodiment is modified or some technical features can be equivalently replaced, without departing from the spirit of the present invention program,
It should all cover within the scope of the technical scheme claimed by the invention.
Embodiment one:
As shown in Figures 1 to 3, the present embodiment provides a kind of denoising structure of range hood, range hood includes having air inlet
The smoke machine main body 1 of mouth, is provided with oil network 2 in the air inlet of smoke machine main body 1, blower 3 is provided in smoke machine main body 1, in oil
It is arranged at intervals with multiple partitions 4 between net 2 and blower 3, ventilation opening 5 is offered on partition 4 or in partition 4 and smoke machine main body
Ventilation opening 5, about 5 interlaced arrangement of ventilation opening are formed between 1 side wall.
In the present embodiment, range hood includes the smoke machine main body 1 with air inlet, in the air inlet of smoke machine main body 1
Be provided with oil network 2, blower 3 be installed in smoke machine main body, by blower 3 work with by external oil smoke by smoke machine main body 1
Air inlet imported into the inside of smoke machine main body 1,1 the inside of smoke machine main body and be arranged at intervals between oil network 2 and blower 3 muti-piece every
Plate 4 with prevent blower 3 work caused by noise directly pass through oil network 2 and propagate to the outside of smoke machine main body 1, and then lead to user
Generate many discomforts.The fixing end of the partition 4 of the present embodiment is set on the inner sidewall of smoke machine main body 1, and free end is toward partition 4
The opposite direction of fixing end extends to form ventilation opening 5 between 4 free end of partition and the inner sidewall of smoke machine main body 1, certainly also
Through-hole can be opened up on partition 4 directly to form ventilation opening 5, two adjacent 5 up and down directions of ventilation opening interlaced arrangement up and down, into
And make range hood guarantee wind-force it is strong while can also make range hood by partition 4 to noise caused by blower 3 into
Row barrier, so that noise generates reflection, and then reduces sound and directly passes through the outside that oil network 2 propagates to smoke machine main body 1, in turn
Further improve the noise reduction effect of range hood.The number of plies of partition 4 is more preferably set as four layers, but is not limited to four layers, may be used also
The partition 4 of other more particularly suitable numbers of plies is selected according to actual needs, as long as between making range hood that can preferably realize sound
Every, if 4 number of plies of partition setting it is less if if noise reduction effect it is unobvious, if 4 number of plies of partition setting it is more if increase cigarette
The resistance that air flows in owner's body 1, and then be affected to the air quantity of range hood.
Further, sound-absorbing protrusion 41 is provided on partition 4, structure is simple, and design rationally, can be to range hood institute
The noise of generation is effectively absorbed.
Preferably, sound-absorbing protrusion 41 is hollow thin-wall construction, and the wall thickness of sound-absorbing protrusion 41 is 0.2mm to 1mm, design
Rationally, the production cost of product has also been can effectively reduce.
Specifically, sound-absorbing material is filled in sound-absorbing protrusion 4, structure is simple, can further be produced to range hood
Raw noise is absorbed.
In the present embodiment, several sound-absorbing protrusions 41 is arranged at intervals with to range hood institute in the upper surface of partition 4
The noise of generation is absorbed, and sound-absorbing protrusion 41 is hollow broken wall structure, and sound-absorbing material is filled in sound-absorbing protrusion 4, is inhaled
Noise caused by kitchen ventilator can be passed to the inside of sound-absorbing protrusion 41 by the thin-walled of sound-absorbing protrusion 41, and by convex in sound-absorbing
41 inside are played filled with sound-absorbing material to absorb on propagation path to noise, so that range hood realizes sound-absorbing drop
The wall thickness of the effect made an uproar, sound-absorbing protrusion 41 is 0.2mm to 1mm, and especially preferably 0.5mm can also be selected according to actual needs
Other more particularly suitable wall thickness.
Preferably, the density for the sound-absorbing material that 41 the inside of sound-absorbing protrusion on every layer of partition 4 is filled is different, partition 4
On sound-absorbing material density be gradually increased from oil network 2 toward the direction of blower 3, design it is reasonable, ingenious, range hood can be produced
The noise of raw high, normal, basic full frequency band is absorbed.
Further, four layers of partition 4 are disposed with from oil network 2 toward the direction of blower 3, wherein the suction on first layer partition
Sound density of material is 2 to 10kg/m3, the sound-absorbing material density on second layer partition is 11 to 20kg/m3, on third layer partition
Sound-absorbing material density is 25 to 35kg/m3, the sound-absorbing material density on the 4th layer of partition is 40 to 60kg/m3, structure is simple,
Design rationally, can effectively reduce noise caused by range hood.
In the present embodiment, the density for the sound-absorbing material that 41 the inside of sound-absorbing protrusion on every layer of partition 4 is filled is different
, it, more preferably will be on partition 4 in order to absorb range hood preferably to the noise of full frequency band caused by range hood
Sound-absorbing material density be gradually increased from oil network 2 toward the direction of blower 3, but be not limited to aforesaid way, can also make the suction on partition 4
Sound density of material is gradually reduced from oil network 2 toward the direction of blower 3, can also be selected according to actual needs certainly other more particularly suitable
Set-up mode.When the partition number of plies of the present embodiment is set as four layers, i.e., first is respectively arranged in the direction of oil network 2 toward blower 3
Layer partition, second layer partition, third layer partition and the 4th layer of partition, wherein the sound-absorbing material density on first layer partition be preferably
10kg/m3It is suitable for absorbing the noise of 1200Hz-1500Hz, the sound-absorbing material density on second layer partition is preferably
15kg/m3It is suitable for absorbing the noise of 900Hz-1200Hz, the sound-absorbing material density on third layer partition is preferably
30kg/m3It is suitable for absorbing the noise of 700Hz-900Hz, the sound-absorbing material density on the 4th layer of partition is preferably
50kg/m3It is suitable for absorbing the noise of 400Hz-700Hz, design rationally, can be to senior middle school caused by range hood
The noise of low full frequency band is absorbed, and then improves the usage experience of user.
Further, the cross section of sound-absorbing protrusion 41 is in half elliptic, and structure is simple, may make sound-absorbing protrusion preferably
Noise is absorbed.
Specifically, the width of ventilation opening 5 is 35mm to 65mm, and structure is simple, compact, and design rationally, can preferably subtract
The resistance of small oil smoke flowing, and then can guarantee the required air quantity of range hood work.
Particularly, partition 4 with a thickness of 0.2mm to 2mm, design it is reasonable, ingenious, can be preferably to caused by blower
Noise is spaced.
In the present embodiment, in order to preferably be absorbed to noise, more preferably the cross section of sound-absorbing protrusion 41 is arranged
For in half elliptic, but it is not limited to ellipse, can be also rectangle, rectangular or semicircle, it certainly can also be according to actual needs
Other more particularly suitable shapes are selected, the cross section of the sound-absorbing protrusion 41 of the present embodiment is in half elliptic, when sound-absorbing protrusion 41 exists
When absorbing to noise caused by blower 3, sound-absorbing protrusion 41 and the contact area of noise can be made from blower 3 toward oil network 2
Direction is gradually increased, and then further enhances the noise reduction effect of range hood.The width of the ventilation opening 5 of the present embodiment be 35mm extremely
65mm more preferably sets 50mm for ventilation opening 5 to reduce the resistance of oil smoke flowing as far as possible, and then insulates against sound between it ensure that
The effect of sound, air quantity needed for ensuring that range hood work.The partition 4 of the present embodiment with a thickness of 0.2mm to 2mm, more
1mm is set so that noise caused by blower 3 is obstructed by partition 4 by the thickness of partition 4 excellently, so that noise generates
Reflection, and then reduce sound and propagate downwards and directly pass through the outside that oil network 2 propagates to smoke machine main body 1 to avoid noise, reduce people
The noise experienced at ear, and then improve the usage experience of user.
Embodiment two:
As shown in Figures 1 to 3, the present embodiment provides a kind of range hoods, including the range hood drop as described in embodiment one
It makes an uproar structure.
In the present embodiment, including the smoke machine main body 1 with air inlet, the air inlet of smoke machine main body 1 is provided with oil
Net 2 is provided with blower 3 in smoke machine main body 1, and the range hood as described in embodiment one is provided between oil network 2 and blower 3
Denoising structure, range hood pass through the range hood noise reduction knot that is provided with as described in embodiment one between oil network 2 and blower 3
Structure can make range hood guarantee that wind-force is strong, in addition it can hinder range hood to noise caused by blower 3
Every so that noise generates reflection, and then reducing sound and propagate sound downwards and directly pass through oil network 2 to avoid noise and propagate to smoke machine
The outside of main body 1, while noise caused by range hood can also be absorbed, further effectively reduce range hood institute
The noise of generation.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (10)
1. a kind of denoising structure of range hood, the range hood includes the smoke machine main body (1) with air inlet, in the cigarette
The air inlet of owner's body (1) is provided with oil network (2), is provided with blower (3) in the smoke machine main body (1), which is characterized in that
It is arranged at intervals with multiple partitions (4) between the oil network (2) and the blower (3), offers ventilation on the partition (4)
Mouth (5) forms ventilation opening (5) between the partition (4) and the side wall of the smoke machine main body (1), the ventilation opening (5)
Upper and lower interlaced arrangement.
2. a kind of denoising structure of range hood according to claim 1, which is characterized in that set on the partition (4)
It is raised (41) to be equipped with sound-absorbing.
3. a kind of denoising structure of range hood according to claim 2, which is characterized in that the sound-absorbing raised (41) is
Hollow thin-wall construction, the wall thickness of the sound-absorbing raised (41) are 0.2mm to 1mm.
4. a kind of denoising structure of range hood according to claim 3, which is characterized in that raised (4) in the sound-absorbing
It is interior to be filled with sound-absorbing material.
5. a kind of denoising structure of range hood according to claim 4, which is characterized in that on every layer of partition (4)
The sound-absorbing raised (41) inside the density of sound-absorbing material filled be different, the sound absorber on the partition (4)
Material density is gradually increased from the oil network (2) toward the direction of the blower (3).
6. a kind of denoising structure of range hood according to claim 5, which is characterized in that from the oil network (2) toward institute
The direction for stating blower (3) is disposed with four layers of partition (4), wherein the sound-absorbing material on the first layer partition is close
Degree is 2 to 10kg/m3, the sound-absorbing material density on second layer partition is 11 to 20kg/m3, described on third layer partition
Sound-absorbing material density is 25 to 35kg/m3, the sound-absorbing material density on the 4th layer of partition is 40 to 60kg/m3。
7. a kind of denoising structure of range hood according to any one of claims 2 to 6, which is characterized in that the sound-absorbing is convex
The cross section for playing (41) is in half elliptic.
8. a kind of denoising structure of range hood according to any one of claims 1 to 6, which is characterized in that the ventilation opening
(5) width is 35mm to 65mm.
9. a kind of denoising structure of range hood according to any one of claims 1 to 6, which is characterized in that the partition (4)
With a thickness of 0.2mm to 2mm.
10. a kind of range hood, which is characterized in that including noise reducing structure for fume extractor as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373257.4A CN110131764A (en) | 2019-05-06 | 2019-05-06 | Range hood and noise reduction structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373257.4A CN110131764A (en) | 2019-05-06 | 2019-05-06 | Range hood and noise reduction structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110131764A true CN110131764A (en) | 2019-08-16 |
Family
ID=67576461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910373257.4A Pending CN110131764A (en) | 2019-05-06 | 2019-05-06 | Range hood and noise reduction structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131764A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529898A (en) * | 2019-08-21 | 2019-12-03 | 黄将庭 | A kind of smoke separating purification all-in-one machine |
| CN113776095A (en) * | 2021-05-31 | 2021-12-10 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
| CN114484530A (en) * | 2020-11-13 | 2022-05-13 | 广东美的白色家电技术创新中心有限公司 | Noise reduction element, noise reduction assembly and range hood |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU487829B2 (en) * | 1976-08-26 | 1976-11-04 | United Packages Goic. ) Pty. Ltd | Sound insulating structure |
| US20030146082A1 (en) * | 2002-01-16 | 2003-08-07 | Ventmaster (Europe) Ltd. | Ultra violet lamp ventilation system method and apparatus |
| CN201269569Y (en) * | 2008-06-13 | 2009-07-08 | 马利华 | Silencer |
| CN106225035A (en) * | 2016-08-22 | 2016-12-14 | 合肥恒信汽车发动机部件制造有限公司 | A kind of cooking fume filter and filter method thereof |
| CN107869751A (en) * | 2017-12-05 | 2018-04-03 | 四川巨海渔业科技有限公司 | A kind of noise absorber of exhauster for removing kitchen fumes |
| CN109448685A (en) * | 2018-10-26 | 2019-03-08 | 华帝股份有限公司 | Composite sound absorption and noise reduction device |
| CN208794489U (en) * | 2018-07-14 | 2019-04-26 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with multilayer noise filtering device |
| CN211084160U (en) * | 2019-05-06 | 2020-07-24 | 华帝股份有限公司 | Range hood and noise reduction structure thereof |
-
2019
- 2019-05-06 CN CN201910373257.4A patent/CN110131764A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU487829B2 (en) * | 1976-08-26 | 1976-11-04 | United Packages Goic. ) Pty. Ltd | Sound insulating structure |
| US20030146082A1 (en) * | 2002-01-16 | 2003-08-07 | Ventmaster (Europe) Ltd. | Ultra violet lamp ventilation system method and apparatus |
| CN201269569Y (en) * | 2008-06-13 | 2009-07-08 | 马利华 | Silencer |
| CN106225035A (en) * | 2016-08-22 | 2016-12-14 | 合肥恒信汽车发动机部件制造有限公司 | A kind of cooking fume filter and filter method thereof |
| CN107869751A (en) * | 2017-12-05 | 2018-04-03 | 四川巨海渔业科技有限公司 | A kind of noise absorber of exhauster for removing kitchen fumes |
| CN208794489U (en) * | 2018-07-14 | 2019-04-26 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with multilayer noise filtering device |
| CN109448685A (en) * | 2018-10-26 | 2019-03-08 | 华帝股份有限公司 | Composite sound absorption and noise reduction device |
| CN211084160U (en) * | 2019-05-06 | 2020-07-24 | 华帝股份有限公司 | Range hood and noise reduction structure thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529898A (en) * | 2019-08-21 | 2019-12-03 | 黄将庭 | A kind of smoke separating purification all-in-one machine |
| CN114484530A (en) * | 2020-11-13 | 2022-05-13 | 广东美的白色家电技术创新中心有限公司 | Noise reduction element, noise reduction assembly and range hood |
| CN113776095A (en) * | 2021-05-31 | 2021-12-10 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
| CN113776095B (en) * | 2021-05-31 | 2022-12-02 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110131764A (en) | Range hood and noise reduction structure thereof | |
| US11204185B2 (en) | Method for producing silencing device, silencing device and air purifier | |
| CN104314874B (en) | Spiral case and the blower fan comprising the spiral case | |
| CN206131400U (en) | Compound structure of making an uproar of falling | |
| CN106014545A (en) | Novel silencer for engine | |
| CN105587047B (en) | A kind of sound-absorbing wall | |
| CN106765384A (en) | A kind of perforated microstructure low noise lampblack absorber | |
| CN211084160U (en) | Range hood and noise reduction structure thereof | |
| CN204813374U (en) | Cooking utensil | |
| CN209604315U (en) | Spiral case, blower and air-conditioning | |
| EP2484981B1 (en) | Suction apparatus | |
| CN205383669U (en) | Make an uproar device and range hood fall | |
| CN110332575A (en) | Range hood with noise reduction structure | |
| CN205939327U (en) | Range hood | |
| CN209510730U (en) | Low-noise range hood | |
| CN106320547A (en) | Noise-reduction machine room housing provided with lateral sound insulation boards | |
| CN205662862U (en) | Non - metallic sound protective screen acoustic baffle | |
| CN205472160U (en) | High -speed elevator ventilation unit | |
| CN211060194U (en) | Oil filtering and noise reducing structure of range hood | |
| CN110131765A (en) | Oil filtering and noise reducing structure of range hood | |
| CN208772708U (en) | A kind of vibration friction welding machine sound proofing enclosure | |
| CN211650366U (en) | Low-noise range hood | |
| CN208924409U (en) | Speaker | |
| CN205897485U (en) | Humidifier bubble noise silence device and have its humidifier | |
| CN203586475U (en) | Wall type ventilating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |