CN106122098A - Spiral case, blower fan and air-conditioning equipment - Google Patents
Spiral case, blower fan and air-conditioning equipment Download PDFInfo
- Publication number
- CN106122098A CN106122098A CN201610630816.1A CN201610630816A CN106122098A CN 106122098 A CN106122098 A CN 106122098A CN 201610630816 A CN201610630816 A CN 201610630816A CN 106122098 A CN106122098 A CN 106122098A
- Authority
- CN
- China
- Prior art keywords
- spiral case
- inside panel
- micropore
- absorbent treatment
- panel
- 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
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
-
- 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
-
- 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
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to blower fan field, a kind of spiral case, blower fan and air-conditioning equipment are provided, spiral case (100) includes snail tongue (10), snail tongue includes exterior panel (11) and inside panel (12), the inner side of exterior panel is provided with absorbent treatment (13), inside panel is provided with micropore noise reduction structure, defines cavity (14) between absorbent treatment and inside panel.When airflow strikes inside panel and make inside panel occur vibration time, vibration will be transferred to absorbent treatment by cavity and energy expenditure will occur, by arranging micropore noise reduction structure at inside panel, can reduce the initial vibration that airflow strikes inside panel is caused.The spiral case of the present invention can significantly reduce noise by the complex method of micropore noise reduction structure and above-mentioned energy expenditure principle.
Description
Technical field
The present invention relates to blower fan technical field, particularly to a kind of spiral case and the blower fan and the air-conditioning equipment that include this spiral case.
Background technology
In the air-conditioning equipment needing good muting function, fan noise is always the main of consumer experience feedback complaint
Problem.In use there is various noise in blower fan, wherein, especially can produce bigger noise in spiral case.
Owing to air flows under the guiding of impeller in the spiral case with special molded line, the shock of spiral case is caused by air-flow
The spiral case of thin-walled vibrates, and then produces bigger noise.It addition, less due to the impeller clearance with impeller at snail tongue, more hold
It is easily generated noise.
Therefore, the problem that in prior art, spiral case noise urgently to be resolved hurrily is bigger.
Summary of the invention
In view of this, it is contemplated that propose a kind of spiral case, to reduce the noise produced because of spiral case vibration.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The present invention provides a kind of spiral case, and wherein, described spiral case includes that snail tongue, described snail tongue include exterior panel and inside panel,
The inner side of described exterior panel is provided with absorbent treatment, defines cavity between described absorbent treatment and described inside panel.
Preferably, described absorbent treatment includes porous fibrous structure.Preferably, described absorbent treatment is spongy layer, described sponge
The thickness of layer is h, and the distance of described inside panel to described spongy layer is d, wherein: 1/2h≤d≤1.5h；And/or, h is
5-12mm。
Preferably, described inside panel is provided with micropore noise reduction structure.
Preferably, described micropore noise reduction structure includes multiple micropore, a diameter of 1.5-2mm of described micropore, and porosity is
3-5%.
Preferably, described micropore noise reduction structure includes the substrate being arranged on described inside panel, and described micropore is arranged on institute
Stating on substrate, the thickness of described substrate is not more than 1mm.
Preferably, described micropore is arranged on described inside panel.
Preferably, described spiral case includes that main body, described main body include described exterior panel, described inside panel, coaming plate and set
Putting the front and rear panels in described coaming plate both sides, described main body is integrated part.
The present invention also provides for a kind of blower fan, and wherein, described blower fan includes the spiral case of the present invention.
The present invention also provides for a kind of air-conditioning equipment, and wherein, described air-conditioning equipment includes the blower fan of the present invention.
By technique scheme, when airflow strikes inside panel and when making inside panel vibrate (i.e. noise), vibration will
Being transferred to absorbent treatment by cavity, this vibration there occurs loss and during absorbent treatment during cavity
Dissipate, reduce energy.It addition, when vibration arrives absorbent treatment through cavity, absorbent treatment will allow partial vibration to enter
And make another part vibration return towards inside panel, and this partial vibration returned will be returned again towards absorbent treatment by inside panel
Return so that partial vibration between inside panel and absorbent treatment the most back and forth, and thus repeatedly through cavity, thus produce in the cavities
Give birth to more loss.Noise, through above-mentioned energy expenditure, can significantly decrease the vibration being eventually transferred to exterior panel, thus
Effectively reduce the noise in spiral case.It addition, by arranging micropore noise reduction structure at inside panel, airflow strikes inside panel can be reduced
The initial vibration caused.Therefore, the spiral case of the present invention can be by micropore noise reduction structure and above-mentioned energy expenditure principle
Complex method significantly reduces noise.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the front view of a kind of embodiment of the spiral case of the present invention；
Fig. 2 is the axonometric chart of the spiral case of Fig. 1；
Fig. 3 is the partial enlarged drawing in Fig. 2 at A.
Description of reference numerals:
100-spiral case, 10-snail tongue, 11-exterior panel, 12-inside panel, 13-absorbent treatment, 14-cavity, 15-substrate, 16-is micro-
Hole, 20-coaming plate, 30-header board, 40-back plate.
Detailed description of the invention
In invention, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower, left and right " typically refers to ginseng
Examine upper and lower, left and right shown in the drawings；It is inside and outside that " inside and outside " refers to relative to the profile of each parts itself.It addition, at this
" multiple " being previously mentioned in bright, refer at least two, including two and two or more.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
According to an aspect of the present invention, it is provided that a kind of spiral case, wherein, described spiral case 100 includes snail tongue 10, described snail tongue
10 include that exterior panel 11 and inside panel 12, the inner side of described exterior panel 11 are provided with absorbent treatment 13, described absorbent treatment 13 and described
Cavity 14 is defined between inside panel 12.
When airflow strikes inside panel 12 and when making inside panel 12 vibrate (i.e. noise), vibration will be transmitted by cavity 14
To absorbent treatment 13, this vibration there occurs loss during cavity 14, and is occurring during absorbent treatment 13
Dissipate, reduce energy.It addition, when vibration arrives absorbent treatment 13 through cavity 14, permission partial vibration is entered by absorbent treatment 13
Enter and make another part vibration return towards inside panel 12, and this partial vibration returned will be by inside panel 12 again towards suction
Sound layer 13 returns so that partial vibration between inside panel 12 and absorbent treatment 13 the most back and forth, and thus repeatedly through cavity 14,
Thus in cavity 14, create more loss.Noise, through above-mentioned energy expenditure, can significantly decrease and be eventually transferred to
The vibration of exterior panel 11, thus effectively reduce the noise in spiral case 100.
In the present invention, the vibration that absorbent treatment 13 is used for passing over through cavity 14 from inside panel 12 produces dissipation, with
Reduce the energy of vibration.Wherein, absorbent treatment 13 can be various suitable form and structure, dissipates as long as can produce vibration
To reduce its energy, to produce sound-absorbing effect.
Wherein, described absorbent treatment 13 can pass through energy conversion consumption acoustic energy.Specifically, acoustic energy (energy i.e. vibrated) can
To be converted into various energy, such as heat energy.To this end, preferably, absorbent treatment 13 can include porous fibrous structure (such as fabric),
So that the vibration arriving absorbent treatment 13 can be entered in absorbent treatment 13 by the hole on porous fibrous structure, and in the resistance of fiber
Under hindering, kinetic energy passing to fiber, fiber can produce motion after obtaining kinetic energy and occur friction to be converted to heat energy each other, thus
Dissipation acoustic energy is changed by this energy.
It is highly preferred that described absorbent treatment 13 is homosphere, i.e. have sound absorption merit on the whole thickness of absorbent treatment 13 continuously
Energy.Wherein it is possible to select various suitable material, as long as good diffuse-reflectance effect can be provided.Further, according to institute's selection
Matter, can be fixed on exterior panel 11 by unrestrained absorbent treatment 13 in the way of selection is suitable.
Preferably, suitable material can be selected so that absorbent treatment 13 has above-mentioned porous fibrous structure.Such as, described
Absorbent treatment 13 can be spongy layer.Thus, the sound absorption function that spongy layer offer is good on the one hand can be utilized, the most permissible
Alleviate deadweight and be easy to be fixed on exterior panel 11 by modes such as bondings.
It addition, find according to the test of many times of the present inventor, the thickness h of spongy layer and inside panel 12 are to spongy layer
Distance d (i.e. the height of cavity) in particular range, using the teaching of the invention it is possible to provide optimal noise reduction.Preferably, 1/2h≤d≤
1.5h。
Additionally, inventor have studied the relation between the thickness h of spongy layer and the work efficiency of spiral case, and demonstrate,proved by test
Bright, when h is 5-12mm, it is possible to take into account the optimal coupling of noise reduction and spiral case work efficiency.
Preferably, described inside panel 12 can be provided with micropore noise reduction structure.By arranging micropore noise reduction at inside panel 12
Structure, can reduce the initial vibration that airflow strikes inside panel 12 is caused.
Therefore, the spiral case 100 of the present invention can pass through micropore noise reduction structure and the composite square of above-mentioned energy expenditure principle
Formula significantly reduces noise.
The micropore noise reduction structure of the present invention includes multiple micropore 16, and can be arranged to for making an uproar in certain frequency band
Sound carries out noise reduction.For carrying out noise reduction for the noise in characteristic frequency section, can drop with the size of relative set micropore 16 and micropore
The porosity of structure of making an uproar.In the present invention, for the actual application environment at snail tongue 10, it is possible to use micropore noise reduction structure is removed
The noise of 300-600Hz, to this end, the diameter of described micropore 16 can be 1.5-2mm, porosity can be 3-5%.
The micropore noise reduction structure of the present invention can be single parts, it is also possible to utilizes the parts of snail tongue 10 to improve.
In one embodiment of the invention, micropore noise reduction structure is single parts, as it is shown on figure 3, described micropore
Denoising structure can include the substrate 15 being arranged on described inside panel 12, and described micropore 16 is arranged on described substrate 15, institute
The thickness stating substrate 15 is not more than 1mm.Wherein, substrate 15 can use various suitable material, as long as micropore 16 can be arranged
And be easy to be fixed on inside panel 12.Such as, substrate 15 can be plastic plate or iron sheet, it is possible to according to inside panel 12
Material selects suitable connected mode (such as bonding, welding) fixing accordingly.
In another embodiment of the invention (not shown), it is possible to use the parts of snail tongue 10 are improved to micropore noise reduction
Structure.Specifically, described micropore 16 can be arranged on described inside panel 12.This embodiment simplifies the system of spiral case 100
Make technique, micropore 16 one-body molded (such as injection mo(u)lding) can be made according to the material of inside panel 12, or on inside panel 12
Wear micropore 16.
In the present invention, micropore 16 is to run through substrate 15 or the through hole of inside panel 12.
It addition, as depicted in figs. 1 and 2, described spiral case 100 includes that main body, described main body include described exterior panel 11, described
Inside panel 12, coaming plate 20 and be arranged on header board 30 and the back plate 40 of described coaming plate 20 both sides.Wherein, as required, main body can
Think split-type structural, i.e. assembled by single exterior panel 11, described inside panel 12, coaming plate 20, header board 30 and back plate 40 and
Become.Preferably, for simplifying structure, described main body can be integrated part.According to the material of main body, suitable molding side can be selected
Formula.Such as, main body can be working of plastics, it is possible to be integrated part by injection mo(u)lding.
According to a further aspect in the invention, it is provided that a kind of blower fan, wherein, described blower fan includes the spiral case 100 of the present invention.By
Spiral case 100 in the present invention can provide noise reduction, and the blower fan of the present invention also has the advantage that noise is little.
Further aspect according to the present invention, it is provided that a kind of air-conditioning equipment, wherein, described air-conditioning equipment includes the wind of the present invention
Machine, thus there is good muting function.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a spiral case, it is characterised in that described spiral case (100) includes that snail tongue (10), described snail tongue (10) include exterior panel
And inside panel (12) (11), the inner side of described exterior panel (11) is provided with absorbent treatment (13), described absorbent treatment (13) and described in
Cavity (14) is defined between wallboard (12).
Spiral case the most according to claim 1, it is characterised in that described absorbent treatment (13) includes porous fibrous structure.
Spiral case the most according to claim 2, it is characterised in that described absorbent treatment (13) is spongy layer, described spongy layer
Thickness is h, and the distance of described inside panel (12) to described spongy layer is d, wherein: 1/2h≤d≤1.5h；And/or, h is
5-12mm。
4. according to the spiral case described in any one in claim 1-3, it is characterised in that described inside panel (12) is provided with micropore
Denoising structure.
Spiral case the most according to claim 4, it is characterised in that described micropore noise reduction structure includes multiple micropore (16), institute
Stating a diameter of 1.5-2mm of micropore (16), porosity is 3-5%.
Spiral case the most according to claim 5, it is characterised in that described micropore noise reduction structure includes being arranged on described inside panel
(12) substrate (15) on, described micropore (16) is arranged on described substrate (15), and the thickness of described substrate (15) is not more than
1mm。
Spiral case the most according to claim 5, it is characterised in that described micropore (16) is arranged on described inside panel (12).
Spiral case the most according to claim 1, it is characterised in that described spiral case (100) includes that main body, described main body include institute
State exterior panel (11), described inside panel (12), coaming plate (20) and be arranged on described coaming plate (20) both sides header board (30) and after
Plate (40), described main body is integrated part.
9. a blower fan, it is characterised in that described blower fan includes the spiral case (100) in claim 1-8 described in any one.
10. an air-conditioning equipment, it is characterised in that described air-conditioning equipment includes the blower fan described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630816.1A CN106122098A (en) | 2016-08-03 | 2016-08-03 | Spiral case, blower fan and air-conditioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630816.1A CN106122098A (en) | 2016-08-03 | 2016-08-03 | Spiral case, blower fan and air-conditioning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106122098A true CN106122098A (en) | 2016-11-16 |
Family
ID=57255730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630816.1A Pending CN106122098A (en) | 2016-08-03 | 2016-08-03 | Spiral case, blower fan and air-conditioning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106122098A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765576A (en) * | 2017-01-03 | 2017-05-31 | 奥克斯空调股份有限公司 | A kind of cabinet type air conditioner indoor machine of use plastics spiral case |
| CN106907351A (en) * | 2017-04-26 | 2017-06-30 | 广东美的制冷设备有限公司 | Spiral case, blower fan and air-conditioner |
| CN107289605A (en) * | 2017-07-31 | 2017-10-24 | 广东美的制冷设备有限公司 | Snail tongue, spiral case, cross flow fan and indoor apparatus of air conditioner |
| CN108105159A (en) * | 2017-09-06 | 2018-06-01 | 广东顺威精密塑料股份有限公司 | A kind of new volute tongue structure of centrifugation |
| CN109026843A (en) * | 2018-09-14 | 2018-12-18 | 珠海格力电器股份有限公司 | Centrifugal compressor and its exhaust volute |
| CN109707670A (en) * | 2018-12-29 | 2019-05-03 | 泛仕达机电股份有限公司 | A kind of centrifugation novel noise reduction volute tongue structure |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111795006A (en) * | 2020-07-17 | 2020-10-20 | 广东美的白色家电技术创新中心有限公司 | Volute assembly and centrifugal fan |
| CN114412839A (en) * | 2021-12-09 | 2022-04-29 | 中国船舶重工集团公司第七一九研究所 | Internal noise reduction structure of centrifugal pump and centrifugal pump |
| WO2023272928A1 (en) * | 2021-06-29 | 2023-01-05 | 广东美的制冷设备有限公司 | Centrifugal fan and air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53138507A (en) * | 1977-05-10 | 1978-12-04 | Sanyo Electric Co Ltd | Centrifugal type blower |
| CN2226666Y (en) * | 1995-09-29 | 1996-05-08 | 中国科学院工程热物理研究所 | Perforated plate volute tongue silencer of centrifugal fan |
| CN200993443Y (en) * | 2006-12-22 | 2007-12-19 | 青岛海信空调有限公司 | Floor-standing air conditioner |
| CN201277204Y (en) * | 2008-10-24 | 2009-07-22 | 昆明理工大学 | Energy-saving denoising centrifugal ventilation machine |
| CN101509506A (en) * | 2008-07-10 | 2009-08-19 | 吉林大学 | Bionic coupling noise elimination noise reduction spiral tougue |
| CN201377405Y (en) * | 2009-03-23 | 2010-01-06 | 胡雪群 | Refrigerator compressor with improved shell structure |
| CN205841325U (en) * | 2016-08-03 | 2016-12-28 | 广东美的制冷设备有限公司 | Spiral case, blower fan and air-conditioning equipment |
-
2016
- 2016-08-03 CN CN201610630816.1A patent/CN106122098A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53138507A (en) * | 1977-05-10 | 1978-12-04 | Sanyo Electric Co Ltd | Centrifugal type blower |
| CN2226666Y (en) * | 1995-09-29 | 1996-05-08 | 中国科学院工程热物理研究所 | Perforated plate volute tongue silencer of centrifugal fan |
| CN200993443Y (en) * | 2006-12-22 | 2007-12-19 | 青岛海信空调有限公司 | Floor-standing air conditioner |
| CN101509506A (en) * | 2008-07-10 | 2009-08-19 | 吉林大学 | Bionic coupling noise elimination noise reduction spiral tougue |
| CN201277204Y (en) * | 2008-10-24 | 2009-07-22 | 昆明理工大学 | Energy-saving denoising centrifugal ventilation machine |
| CN201377405Y (en) * | 2009-03-23 | 2010-01-06 | 胡雪群 | Refrigerator compressor with improved shell structure |
| CN205841325U (en) * | 2016-08-03 | 2016-12-28 | 广东美的制冷设备有限公司 | Spiral case, blower fan and air-conditioning equipment |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765576A (en) * | 2017-01-03 | 2017-05-31 | 奥克斯空调股份有限公司 | A kind of cabinet type air conditioner indoor machine of use plastics spiral case |
| CN106907351A (en) * | 2017-04-26 | 2017-06-30 | 广东美的制冷设备有限公司 | Spiral case, blower fan and air-conditioner |
| CN107289605A (en) * | 2017-07-31 | 2017-10-24 | 广东美的制冷设备有限公司 | Snail tongue, spiral case, cross flow fan and indoor apparatus of air conditioner |
| CN107289605B (en) * | 2017-07-31 | 2023-09-26 | 广东美的制冷设备有限公司 | Volute tongue, volute, cross-flow fan and air conditioner indoor unit |
| CN108105159A (en) * | 2017-09-06 | 2018-06-01 | 广东顺威精密塑料股份有限公司 | A kind of new volute tongue structure of centrifugation |
| CN109026843A (en) * | 2018-09-14 | 2018-12-18 | 珠海格力电器股份有限公司 | Centrifugal compressor and its exhaust volute |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111102247B (en) * | 2018-10-25 | 2022-05-17 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN109707670A (en) * | 2018-12-29 | 2019-05-03 | 泛仕达机电股份有限公司 | A kind of centrifugation novel noise reduction volute tongue structure |
| CN111795006A (en) * | 2020-07-17 | 2020-10-20 | 广东美的白色家电技术创新中心有限公司 | Volute assembly and centrifugal fan |
| WO2023272928A1 (en) * | 2021-06-29 | 2023-01-05 | 广东美的制冷设备有限公司 | Centrifugal fan and air conditioner |
| CN114412839A (en) * | 2021-12-09 | 2022-04-29 | 中国船舶重工集团公司第七一九研究所 | Internal noise reduction structure of centrifugal pump and centrifugal pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106122098A (en) | Spiral case, blower fan and air-conditioning equipment | |
| CN106871204B (en) | Range hood | |
| JP2009109991A5 (en) | ||
| CN203454371U (en) | Low-noise air conditioner indoor cabinet unit | |
| CN106439959A (en) | Low noise and large suction range hood | |
| JP2012168415A (en) | Sound absorption panel | |
| CN101547390A (en) | Loudspeaker device | |
| CN106088698B (en) | One kind is used for power-equipment noise reduction chamber | |
| CN205841325U (en) | Spiral case, blower fan and air-conditioning equipment | |
| JP5446018B2 (en) | Sound absorbing structure | |
| JP2020026950A (en) | Muffling box structure | |
| CN202611004U (en) | Honeycomb composite sound-absorbing board with honeycomb core layer covered with sound-absorbing short fiber | |
| CN205908520U (en) | Spiral case, fan and air conditioning equipment | |
| CN109208957A (en) | Room is formed based on the brick body for leading the noise reduction of phase hole | |
| CN202792708U (en) | Parallel flow heat exchanger and air conditioner | |
| CN205383669U (en) | Make an uproar device and range hood fall | |
| CN106015101A (en) | Volute, fan and air conditioning equipment, | |
| CN202301217U (en) | Sound absorption structure of soundproof housing | |
| CN107314472A (en) | Median septum component, air-conditioner outdoor unit and air conditioner | |
| CN207922325U (en) | Range hood | |
| CN207363155U (en) | A kind of bamboo porous noise reducing plate | |
| CN202764985U (en) | Rail train wall structure | |
| CN208036287U (en) | Bogie assembly and Rail Transit System with it | |
| CN201581577U (en) | Silencing internal decorative plate | |
| CN218032062U (en) | Noise reduction mechanism for air duct |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
Application publication date: 20161116 |
|
| RJ01 | Rejection of invention patent application after publication |