CN109990328A - A kind of range hood and its fan assembly - Google Patents
A kind of range hood and its fan assembly Download PDFInfo
- Publication number
- CN109990328A CN109990328A CN201711476187.2A CN201711476187A CN109990328A CN 109990328 A CN109990328 A CN 109990328A CN 201711476187 A CN201711476187 A CN 201711476187A CN 109990328 A CN109990328 A CN 109990328A
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- 230000005855 radiation Effects 0.000 claims abstract description 30
- 230000000930 thermomechanical effect Effects 0.000 claims description 20
- 125000001475 halogen functional group Chemical group 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 9
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000391 smoking effect 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of range hood and its fan assemblies, fan assembly increases noise reduction module in the air inlet of spiral case, and noise reduction module is optimized, noise reduction module can have the function that the air-flow of smooth air inlet, reduce air inlet air stream turbulence intensity, achieve the purpose that reduce kitchen ventilator noise in the case where not influencing range hood air quantity, wind pressure.The ring grille of noise reduction grid of the present invention can reduce the Radial Flow of air inlet air-flow, and radiation grids can reduce the circle circumferential flow of air inlet air-flow, to reduce the level of disruption of air-flow.The air intake of all ring grilles of the present invention matches with air inlet air velocity distribution of contours, can make the air-flow of identical speed while enter ring grille；The distribution arrangement of ring grille of the present invention is consistent with the air velocity direction of air inlet.One aspect of the present invention can reduce flow perturbation, noise be reduced, on the other hand, on airflow pressure without influence.
Description
Technical field
The present invention relates to a kind of machine for kitchen use equipment technical fields, specifically, being to be related to a kind of range hood and its wind
Thermomechanical components.
Background technique
Range hood is electric appliance important in Modern Family kitchen, smoking, tobacco control effect and the noise level of range hood
User is influenced to the usage experience of product, and therefore, the noise for how reducing range hood is also very important research direction.
Range hood generally comprises the components such as shell, spiral case, centrifugal fan and oil strain module, when range hood works inside
Noise caused by centrifugal fan high speed rotation is the dominant noise source of range hood.In the prior art would generally by optimization from
Heart fan and volute structure reduce the noise of range hood.However, the air inlet position of spiral case is also important noise source,
But the resistance due to often will increase centrifugal fan in spiral case air inlet position setting noise-reducing components, influence range hood
Air quantity and wind pressure etc. influence the fume eliminating effect of range hood.Therefore, in order to guarantee the using effect of range hood, existing suction
The air inlet of kitchen ventilator is not provided with noise-reducing components.
Summary of the invention
The purpose of the present invention is to provide a kind of range hood air thermomechanical components are based on, range hood fume eliminating effect is not being influenced
In the case where fruit, solves the technical issues of noise of spiral case air inlet.
In order to solve the above technical problems, the present invention is achieved by the following scheme:
A kind of range hood air thermomechanical components, the centrifugal fan including spiral case and in spiral case have air inlet on the spiral case
And air outlet, the air inlet are provided with noise reduction module, the noise reduction module includes noise reduction grid and air-ducting ring;The noise reduction
Grid includes by the same central axial outer several ring grilles successively arranged, and the air-ducting ring is located at outermost layer ring grille
Periphery, the air-ducting ring and the ring grille have same central axis；The air intake of the ring grille is on air inlet direction
Protrude from the plane where the air intake of the outer annular grid adjacent with the ring grille；The air intake of the ring grille
Angle between the line of outlet air end and outlet air end and the vertical line of central axis is less than the outer layer ring adjacent with the ring grille
Angle between the air intake of shape grid and the line of outlet air end and outlet air end and the vertical line of central axis；Two neighboring ring grille
Between have several radiation grids.
Range hood air thermomechanical components as described above, between the ring grille and internal layer ring grille adjacent thereto
The quantity of radiation grids is less than the quantity of the radiation grids between the ring grille and outer annular grid adjacent thereto.
Range hood air thermomechanical components as described above, the air intake of the ring grille and outer annular lattice adjacent thereto
Distance of the outlet air end of grid between the projection of the vertical plane of the central axis be less than the ring grille outlet air end with its phase
Distance of the air intake of adjacent internal layer ring grille between the projection of the vertical plane of the central axis.
Range hood air thermomechanical components as described above, in the plane where the central axis, several ring grilles into
Wind end is on same elliptic arc.
Range hood air thermomechanical components as described above, between the ring grille and internal layer ring grille adjacent thereto
Radiation grids between radiation grids and the ring grille and outer annular grid adjacent thereto are staggered.
Range hood air thermomechanical components as described above, the air-ducting ring have bell mouth shape air dam.
Range hood air thermomechanical components as described above, the air-ducting ring have the circular installation to connect with the air dam
Portion.
The section of plane is circle where range hood air thermomechanical components as described above, the ring grille and the central axes
Arc.
Range hood air thermomechanical components as described above, the company where the arc-shaped both ends and the circular arc between the center of circle
The angular range of line is between 20o-40o.
A kind of range hood, the range hood include shell and positioned at the intracorporal above-mentioned fan assembly of shell, the shell
Air inlet is offered on body, and oil strain module is provided on the air inlet.
Compared with prior art, the advantages and positive effects of the present invention are: the present invention increases drop in the air inlet of spiral case
It makes an uproar module, and noise reduction module is optimized, noise reduction module can reach the air-flow of smooth air inlet, reduce air inlet
The effect for locating air stream turbulence intensity reaches the mesh for reducing kitchen ventilator noise in the case where not influencing range hood air quantity, wind pressure
's.The ring grille of noise reduction grid of the present invention can reduce the Radial Flow of air inlet air-flow, radiation grids can reduce into
The circle circumferential flow of air-flow at air port, to reduce the level of disruption of air-flow.The air intake of ring grille of the present invention is in air inlet side
It is protruding upward in the plane where the air intake of adjacent outer annular grid, the air intake and air inlet of all ring grilles
Air velocity distribution of contours matches, and can make the air-flow of identical speed while enter ring grille；In addition, due to air inlet
Air velocity it is different from the angle of air inlet in different location, thus, the air intake and outlet air end of ring grille of the present invention
Line and outlet air end and the vertical line of central axis between angle be less than adjacent outer annular grid air intake and outlet air end
Line and outlet air end and the vertical line of central axis between angle, the distribution arrangement of ring grille of the present invention and the air-flow of air inlet
Directional velocity is consistent.In conclusion one aspect of the present invention can reduce flow perturbation, noise is reduced, on the other hand, to air quantity wind
Pressure is without influence.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Detailed description of the invention
Fig. 1 is the schematic diagram that specific embodiment of the invention range hood removes partial shell.
Fig. 2 is the perspective view of specific embodiment of the invention noise reduction module.
Fig. 3 is the main view of specific embodiment of the invention noise reduction module.
Fig. 4 is the side view of specific embodiment of the invention noise reduction module.
Fig. 5,6 be specific embodiment of the invention noise reduction module plane where central axis cross-sectional view.
Fig. 7 is the cross-sectional view of ring grille plane where central axis of specific embodiment of the invention noise reduction module.
Fig. 8 is the cross-sectional view of the single ring grille of specific embodiment of the invention plane where central axis.
Fig. 9 is the cross-sectional view of the single ring grille of specific embodiment of the invention plane where central axis.
Figure 10 is the assembling schematic diagram of the split type noise reduction module of the specific embodiment of the invention.
Figure 11 is the exploded view of the split type noise reduction module of the specific embodiment of the invention.
Figure 12 is specific embodiment of the invention spiral case air inlet position Velocity Profiles figure.
Figure 13 is the speed vector figure of specific embodiment of the invention spiral case air inlet position CFD simulation analysis.
Wherein, 1, shell；2, oil strain module；3, spiral case；4, noise reduction module；41, noise reduction grid；411, ring grille；
412, radiation grids；413, muscle is installed；42, air-ducting ring；421, bell mouth shape air dam；422, circular mounting portion.
Specific embodiment
A specific embodiment of the invention is described in detail with reference to the accompanying drawing.
The present embodiment proposes a kind of range hood, as shown in Figure 1, range hood includes shell 1 and in shell 1
Fan assembly offers on the bottom of shell 1 and (does not mark the air inlet that the air outside shell 1 is introduced into inside shell 1 in figure
Note), it is provided with oil strain module 2 on air inlet, when oil strain module 2 is used to air shell 1 outside introducing 1 inside of shell, filters
Except the oil in air.Fan assembly includes spiral case 3 and the centrifugal fan (figure in spiral case 3 for generating air-flow, fan assembly
In be not shown), air inlet (unmarked in figure) is offered in the axial direction of centrifugal fan on 3 side plate of spiral case, the top of spiral case 3 is opened
Equipped with air outlet.The air inlet increase noise reduction module 4 focused in spiral case 3 of the present embodiment, to reach smooth air inlet
The air-flow at place, the effect for reducing air inlet air stream turbulence intensity, reach in the case where not influencing range hood air quantity, wind pressure
Reduce the purpose of range hood noise.Noise reduction module 4 primarily serves the effect for reducing noise, can also play auxiliary removal air
In oil effect, the oil of removal is collected to oil strain module 2 by the oil outlet of 3 bottom of spiral case.
Noise reduction module 4 is specifically described in emphasis below, and described air inlet refers both to the air inlet of spiral case 3 below.
As shown in Figure 2-5, the noise reduction module 4 of the present embodiment includes noise reduction grid 41 and air-ducting ring 42, the drop of the present embodiment
Grid 41 of making an uproar is integrally formed with air-ducting ring 42, and air-ducting ring 42 is located at the periphery of noise reduction grid 41.The effect of air-ducting ring 42 is by gas
Body is smoothly directed to centrifugal fan, guarantees that air inlet air-flow is uniform, achievees the purpose that promote fan efficiency.The work of noise reduction grid 41
With being the level of disruption for reducing air inlet air-flow, to reduce the vortex noise of blower.
As shown in figure 5, the air-ducting ring 42 of the present embodiment includes bell mouth shape air dam 421 and circular mounting portion 422.Loudspeaker
Air-flow of the mouth shape air dam 421 for air inlet is oriented to, and flows into air inlet conducive to air-flow, and reduce noise.Annulus
Shape mounting portion 422 is located at the periphery of bell mouth shape air dam 421 and connects with bell mouth shape air dam 421, is used for noise reduction mould
Block 4 is mounted on air inlet.As shown in Figure 2,3, screw hole is provided at circular mounting portion 422, circular mounting portion 422 is logical
It crosses screw and is mounted on air inlet.
As shown in Figure 2,3, noise reduction grid 41 include by the same central axial outer several ring grilles 411 successively arranged,
Air-ducting ring 42 is located at the periphery of outermost layer ring grille 411, and air-ducting ring 42 and ring grille 411 have same central axis.
As shown in Fig. 2,4,5, the air intake of ring grille 411 is convex for adjacent with ring grille 411 in air inlet direction
Outer annular grid 411 air intake where plane.
Preferably, as shown in figure 5, in the plane where central axis, the air intake of several ring grilles 411 is same ellipse
On circular arc.
The air-ducting ring 42 of the present embodiment includes bell mouth shape air dam 421, in the plane where central axis, several annulars
The air intake of grid 411 meets the flow distribution rule of air inlet position air-flow on same elliptic arc.As shown in figure 12, from
CFD simulation result can see in air inlet position, and elliptic cross-section is presented in air velocity distribution of contours, and noise reduction grid 41 is
Achieve the purpose that reduce flow perturbation, it is necessary to make the air-flow of identical speed while entering noise reduction grid 41, therefore, ring grille
411 shapes (in the plane where central axis, face) where the air intake of several ring grilles 411 design is flowed with air-flow
Distribution is consistent.
The present embodiment has several radiation grids 412 between two neighboring ring grille 411.
Noise reduction grid 41 is made of ring grille 411 and radiation grids 412, ring grille 411 with air-ducting ring 42 is concentric sets
Set, radiation grids 412 are strip grid from from 411 center of ring grille to external radiation, ring grille 411 with it is adjacent thereto interior
The quantity of radiation grids 412 between layer ring grille 411 is less than ring grille 411 and outer annular grid adjacent thereto
The quantity of radiation grids 412 between 411.The quantity of radiation grids between two adjacent ring grilles from center outward by
It is cumulative plus, the minimum number of the radiation grids between center and two ring grilles adjacent thereto, outermost layer and and its
The quantity of radiation grids between two adjacent ring grilles is most.Since center annular grid diameter is minimum, outermost layer ring
Shape grid diameter is maximum, if being all the radiation grids of identical quantity from center to outermost layer, that will be so that central area gas
Flow effective area of passage to reduce, increase the resistance of the position, simultaneously as the diameter of center annular grid is minimum, circumference to
The air-flow of flowing is also relatively small, therefore, can achieve the mesh for reducing air-flow circle circumferential flow using least radiation grids
's.On the basis of the set-up mode of the present embodiment radiation grids can guarantee can to reduce the circle circumferential flow of air-flow, do not increase
The resistance of air-flow operation.
Radiation grids 412 and ring grille 411 between ring grille 411 and internal layer ring grille 411 adjacent thereto
Radiation grids 412 between outer annular grid 411 adjacent thereto are staggered.Ring grille is set on noise reduction grid 41
The Radial Flow and circle circumferential flow of air-flow can be reduced with radiation grids, but air-flow Radial Flow and circle circumferential flow are still
Inevitably exist, so that vortex noise can be generated, in order to avoid generated vortex noise concentrates in certain some frequency,
So that the noise of these frequencies has biggish amplitude, therefore, the radiation grids between ring grille are designed as by the present embodiment
Staggered, can be staggered frequency noise in this way, avoid noise in certain frequencies there are apparent peak values.
In order to make noise reduction grid 41 achieve the purpose that reduce noise, noise reduction grid 41 allows for reducing flow perturbation, gas
Stream enter centrifugal fan when, in addition to along 41 rotary shaft of noise reduction grid (central axis) axial direction flowing, there are also diameter flowing and circumference to
The air-flow of flowing, setting ring grille are the Radial Flows in order to reduce air-flow, and setting radiation grids are to reduce air-flow
Circle circumferential flow.
As shown in fig. 7, between the air intake of ring grille and the line of outlet air end and outlet air end and the vertical line of central axis
Angle a2 is less than the air intake of the outer annular grid adjacent with ring grille and the line of outlet air end and outlet air end and central axis
Vertical line between angle a1.
Assuming that the maximum ring grille of diameter be X1, diameter minimum ring grille be Xn, intermediate annular grid be respectively X2,
Angle between X3...Xn-1, X1 and its outlet air end and the vertical line of central axis is a1, the vertical line of X2 and its outlet air end and central axis
Between angle be a2, and so on, the angle between Xn and its outlet air end and the vertical line of central axis is an, then, a1 to an is full
90 ° of > of a3... > an of sufficient a1 > a2 >；
As shown in figure 8, ring grille 411 is made of L1, L2, L3, L4 four arcs, wherein L3, L4 are isocentric circular arc, L1, L2
Circular arc is tangent with L3, L4, and the center of circle of L1 circular arc is that A(A is air intake), the center of circle of L2 circular arc be B(B be outlet air end), AB is ring
The angle of the air intake of shape grid and the line of outlet air end, straight line AB and horizontal line S are the line of air intake and outlet air end and go out
Angle between wind end and the vertical line of central axis.
The air velocity that can be seen that from the speed vector figure of Figure 13 air inlet CFD simulation analysis into centrifugal fan exists
Different location is different from the angle of horizontal line (horizontal line in figure), and from center, Lap Time degree angle is gradually increased outward, central angle
About 90 ° of degree, outer ring angle is maximum, in order to enable not increasing the resistance of air inlet position, therefore, this reality after increasing ring grille
It is that need to keep consistent with VELOCITY DISTRIBUTION that a ring grille straight line, which is applied, with the angle of horizontal line (horizontal line in figure).The present embodiment ring
The setting of shape grid and VELOCITY DISTRIBUTION always, not will increase the resistance of air inlet position, can guarantee air quantity and wind pressure.
As shown in Figure 6, the outlet air end of the air intake of ring grille and outer annular grid adjacent thereto is in central axis
The distance between projection of vertical plane is less than the outlet air end of ring grille and the air intake of internal layer ring grille adjacent thereto in
The distance between projection of vertical plane of mandrel.
Assuming that the maximum ring grille of diameter be X1, diameter minimum ring grille be Xn, intermediate annular grid be respectively X2,
X3...Xn-1, X1 and X2 between the projection of the vertical plane of central axis at a distance from for t1, X2 and X3 the vertical plane of central axis projection
The distance between be t2, and so on, Xn-1 and Xn between the projection of the vertical plane of central axis at a distance from be tn-1, t1 to tn is full
Sufficient t1 < t2 < t3... < tn-1.Since air inlet each region flow gradients size has fan delivery, pressure, noise
Certain to influence, the above-mentioned set-up mode of the present embodiment can guarantee that the area of passage between adjacent annular grid is identical or approximate phase
Together, air inlet each region can be made to obtain lesser flow gradients, can guarantee the flow phase between each ring grille
Together, guarantee air quantity and reduce noise.
As shown in Figure 9, ring grille and the section of plane where central axes are arc-shaped.Arc-shaped both ends and the circle
The angular range β of line where arc between the center of circle is between 20o-40o.The setting of ring grille is primarily to reduce air-flow
Radial Flow, achieve the purpose that preferably to control air-flow.The folder of line where arc-shaped both ends and circular arc between the center of circle
Angle beta size is practical be exactly ring grille section arc length size, angle β increases, and ring grille section arc length is longer,
It can achieve the purpose of preferably control air-flow in this way, but due to the adhesive character of gas, can be produced on the wall surface of ring grille
Raw frictional resistance, frictional resistance are to have relationship with viscosity, the speed of gas, also have relationship with the length for flowing through wall surface, circular arc is long
Degree is longer, and frictional resistance is bigger, thus will increase the resistance of whole grid, so that complete machine air quantity is decayed, therefore, angle
Within the scope of preferably 20 ° -40 ° of β, ring grille both can preferably control air-flow, reduce Radial Flow, and can be avoided friction resistance
Complete machine air quantity is decayed caused by power is excessive.
4 structure of noise reduction module of the present embodiment is simple, production is easy to assembly, range hood air quantity can not caused to decay
In the case of reduce range hood noise.
As shown in the table, any part is not provided with for prior art air inlet and increase the noise reduction grid of the present embodiment
Afterwards, range hood air quantity and the noise comparison measured under same rotation speed of fan, it is seen then that in the case where no reduction air quantity,
Reduce noise.
| Air quantity (cube/minute) | Noise dB(A) | |
| The prior art | 18.53 | 71.5 |
| The present embodiment | 18.51 | 69 |
The noise reduction grid 41 and air-ducting ring 42 of the present embodiment can be integrally formed by resin or metal material.
Certainly, as shown in Figure 10,11, air-ducting ring 42 and noise reduction grid 41 can also be separately formed, then by screw or
The fixed structures such as person's buckle, card slot are fixed together.Specifically, installing muscle in the outer rim setting installation muscle 413 of noise reduction grid 41
Screw hole or buckle or card slot are provided on 413, with the screw hole or card slot or buckle dress on the circular mounting portion 422 of air-ducting ring 42
Match.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of range hood air thermomechanical components, the centrifugal fan including spiral case and in spiral case has air inlet on the spiral case
Mouth and air outlet, it is characterised in that, the air inlet is provided with noise reduction module, and the noise reduction module includes noise reduction grid and leads
Solar or lunar halo;The noise reduction grid includes by the same central axial outer several ring grilles successively arranged, and the air-ducting ring is located at most
The periphery of outer annular grid, the air-ducting ring and the ring grille have same central axis；The air inlet of the ring grille
Hold the plane where entering the wind the convex air intake for the outer annular grid adjacent with the ring grille in direction；The ring
Angle between the air intake of shape grid and the line of outlet air end and outlet air end and the vertical line of central axis is less than and the annular lattice
Angle between the grid adjacent air intake of outer annular grid and the line of outlet air end and outlet air end and the vertical line of central axis；Phase
There are several radiation grids between adjacent two ring grilles.
2. range hood air thermomechanical components according to claim 1, which is characterized in that the ring grille and adjacent thereto
The quantity of radiation grids between internal layer ring grille is less than between the ring grille and outer annular grid adjacent thereto
Radiation grids quantity.
3. range hood air thermomechanical components according to claim 1, which is characterized in that the air intake of the ring grille with
Distance between the projection of vertical plane of the outlet air end of its adjacent outer annular grid in the central axis is less than the annular lattice
At a distance between the projection of vertical plane of the air intake of the outlet air end of grid and internal layer ring grille adjacent thereto in the central axis.
4. range hood air thermomechanical components according to claim 1, which is characterized in that the plane where the central axis
On, the air intake of several ring grilles is on same elliptic arc.
5. range hood air thermomechanical components according to claim 1, which is characterized in that the ring grille and adjacent thereto
The radiation lattice between radiation grids and the ring grille and outer annular grid adjacent thereto between internal layer ring grille
Grid are staggered.
6. range hood air thermomechanical components according to claim 1, which is characterized in that the air-ducting ring is led with bell mouth shape
Wind portion.
7. range hood air thermomechanical components according to claim 6, which is characterized in that the air-ducting ring has and the wind-guiding
The circular mounting portion that portion connects.
8. range hood air thermomechanical components according to claim 1, which is characterized in that the ring grille and the central axes
The section of place plane is arc-shaped.
9. range hood air thermomechanical components according to claim 5, which is characterized in that the arc-shaped both ends and the circle
The angular range of line where arc between the center of circle is between 20o-40o.
10. a kind of range hood, which is characterized in that the range hood include shell and be located at the intracorporal claim 1-9 of shell
Fan assembly described in any one offers air inlet on the shell, oil strain module is provided on the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476187.2A CN109990328B (en) | 2017-12-29 | 2017-12-29 | Range hood and fan assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476187.2A CN109990328B (en) | 2017-12-29 | 2017-12-29 | Range hood and fan assembly thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109990328A true CN109990328A (en) | 2019-07-09 |
| CN109990328B CN109990328B (en) | 2023-12-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711476187.2A Active CN109990328B (en) | 2017-12-29 | 2017-12-29 | Range hood and fan assembly thereof |
Country Status (1)
| Country | Link |
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| CN113685373A (en) * | 2020-05-19 | 2021-11-23 | 宁波方太厨具有限公司 | Method for selecting air inlet ring of fan system |
| CN113776097A (en) * | 2021-08-12 | 2021-12-10 | 海信(广东)厨卫***股份有限公司 | Fan assembly and range hood |
| US11994151B1 (en) | 2022-12-21 | 2024-05-28 | Delta Electronics, Inc. | Guiding grid |
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| CN113685373A (en) * | 2020-05-19 | 2021-11-23 | 宁波方太厨具有限公司 | Method for selecting air inlet ring of fan system |
| CN113685373B (en) * | 2020-05-19 | 2022-11-01 | 宁波方太厨具有限公司 | Method for selecting air inlet ring of fan system |
| CN113776097A (en) * | 2021-08-12 | 2021-12-10 | 海信(广东)厨卫***股份有限公司 | Fan assembly and range hood |
| US11994151B1 (en) | 2022-12-21 | 2024-05-28 | Delta Electronics, Inc. | Guiding grid |
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| Publication number | Publication date |
|---|---|
| CN109990328B (en) | 2023-12-26 |
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