CN109882447A - Fan and range hood with same - Google Patents
Fan and range hood with same Download PDFInfo
- Publication number
- CN109882447A CN109882447A CN201910147707.8A CN201910147707A CN109882447A CN 109882447 A CN109882447 A CN 109882447A CN 201910147707 A CN201910147707 A CN 201910147707A CN 109882447 A CN109882447 A CN 109882447A
- Authority
- CN
- China
- Prior art keywords
- fan blade
- wheel disc
- air
- venthole
- flow
- 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
- 239000000463 material Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 description 15
- 238000005204 segregation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010019233 Headaches Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan and a range hood with the fan, wherein the fan comprises a volute and an impeller, the impeller is arranged in the volute, the impeller comprises a wheel disc and a plurality of fan blades, the fan blades are arranged at intervals along the circumferential direction of the wheel disc, the range hood further comprises a flow guiding device, an inner cavity is arranged in the wheel disc, an air inlet communicated with the inner cavity is formed in the wheel disc, a cavity is formed in the fan blades, air outlet holes communicated with the cavity are formed in the surfaces of the fan blades, the inner cavity of the wheel disc is communicated with the cavity of the fan blades, one end of the flow guiding device is arranged on the outer side of the volute and is communicated with a volute tongue part of the volute, the other end of the flow guiding device is communicated with the air inlet of the wheel disc, noise generated during working is small, and the noise level of the.
Description
Technical field
The present invention relates to kitchen appliance technical field more particularly to a kind of blower and with its range hood.
Background technique
In the related technology, range hood has become one of machine for kitchen use equipment indispensable in Modern Family, wherein
Air quantity, wind pressure, noise are the core index of range hood.Which can encounter in the range hood using family when asking consumer
When problem, 85% consumer can refer to that the suction of range hood is small, smoke absorption effect is undesirable, and consumer generally believes suction
Power is big, smoke absorption effect is that they choose the greatest requirements of range hood well.Entire industry collective recent years enters big suction
Epoch, big suction range hood also become the first choice that consumer buys kitchen ventilator, and the big suction range hood market share goes up
The remote super other kinds of range hood of speed, has really obtained the generally approval of the majority of consumers.
Recent years, Wind Volume, big suction concept were promoted mainly always in the smoke machine market of the country, with stepping up for air quantity, inhaled
The noise that kitchen ventilator generates is also increasing.When cooking open range hood just can't hear voice, phone sound, doorbell sound and
Child's sound or even this strong noise can make housewife and kitchen operation personnel generate irritated, headache, and palpitaition etc. is bad anti-
It answers, is used for a long time, physical and mental health can be caused to seriously affect.Therefore noise becomes urgently to be resolved existing for existing range hood
Technical problem.With the raising that people require quality of the life, user when choosing range hood, also make an uproar by increasingly concern smoke machine
The size of sound parameter.It may be said that the superiority and inferiority of smoke machine noise performance is a big key factor of product competitiveness.Range hood generates
Noise be concentrated mainly on blower, the noise that it is generated when the impeller rotation of blower is very big, seriously affects housewife and kitchen
The usage experience of operator.
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 bright purpose is to propose a kind of blower, and generated noise is small when work, can improve the noise level of range hood.
Above-mentioned purpose is achieved by the following technical solution:
A kind of blower, including spiral case and impeller, the impeller are set to inside the spiral case, wherein the impeller includes wheel
Disk and multiple fan blades, the multiple fan blade being provided at circumferentially spaced along the wheel disc, further include drainage device, in the wheel disc
It offers inner cavity and offers air inlet in communication with the inner cavity on the wheel disc, offer cavity in the fan blade
And the venthole being connected to the cavity is offered on the surface of the fan blade, the sky of the inner cavity of the wheel disc and the fan blade
Chamber is connected, and described drainage device one end is set on the outside of the spiral case and is connected with the volute tongue portion of the spiral case, another
End is connected with the air inlet of the wheel disc.
In some embodiments, the drainage device includes main pipeline and multiple subtubes, and multiple subtubes are set
The main pipeline is placed in close to the one end in the volute tongue portion, the main pipeline passes through multiple subtubes and the spiral case
Volute tongue portion is connected.
In some embodiments, the air inlet of the wheel disc is connected with air inlet pipe, the other end of the main pipeline and institute
State air inlet pipe clamping.
In some embodiments, the other end of the main pipeline is provided with interior buckle, is set in the air inlet tube end
It is equipped with outer buckle, the interior buckle connects with the wild card buckle.
In some embodiments, lubriation material is filled in the junction of the main pipeline and the air inlet pipe.
In some embodiments, the fan blade is aerofoil profile fan blade.
In some embodiments, the fan blade has windward side and leeward, opens on windward side and on leeward
Equipped with venthole, and on windward side, the quantity of venthole is less than the quantity of venthole on leeward.
In some embodiments, air-flow is respectively formed in the fan blade two sides flow into position and air-flow outflow position,
The leeward of the fan blade, air-flow flow into the outlet hole number at position more than the outlet hole number at air-flow outflow position；
In the windward side of the fan blade, air-flow flows into the outlet hole number at position and the venthole at air-flow outflow position
Quantity is suitable.
It is another object of the present invention to propose a kind of range hood, noise is small, can promote the usage experience of user.
Above-mentioned purpose is achieved by the following technical solution:
A kind of range hood has blower as described above.
Compared with prior art, the present invention at least having the effect that
1, blower of the invention, by the drainage device added, for the air in spiral case to be imported into leaf through volute tongue portion
In wheel, power is provided with the impeller that this can be separated for active control fluid, after pressure-air enters the inner cavity of wheel disc, through fan blade
Cavity and sprayed from venthole, fan blade boundary layer fluid segregation phenomenon can be reduced with this, and then significantly reduce range hood
Noise improves the indexs such as the wind pressure of range hood, improves user experience, promotes Products competitiveness.
Other beneficial outcomes of the invention will be explained in conjunction with attached drawing in a specific embodiment.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of blower in the embodiment of the present invention；
Fig. 2 is the structure sectional view of impeller in the embodiment of the present invention；
Fig. 3 is the front schematic view of fan blade in the embodiment of the present invention；
Fig. 4 is the schematic rear view of fan blade in the embodiment of the present invention；
Fig. 5 is the stereoscopic schematic diagram of range hood in the embodiment of the present invention.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Embodiment one: as shown in Figure 1, Figure 2, Figure 3 and Figure 4, the present embodiment provides a kind of blowers, including spiral case 10 and leaf
Wheel 20, impeller 20 are set to 10 the inside of spiral case, and wherein impeller 20 includes wheel disc 1 and multiple fan blades 2, and multiple fan blades 2 are along wheel disc 1
It is provided at circumferentially spaced, further includes drainage device 3, inner cavity 100 is offered in wheel disc 1 and offered on wheel disc 1 and inner cavity
The air inlets 101 of 100 connections, cavity 200 are offered in fan blade 2 and is offered on the surface of fan blade 2 are connected to cavity 200
Venthole 201, the inner cavity 100 of wheel disc 1 is connected with the cavity 200 of fan blade 2, and 3 one end of drainage device is set to outside spiral case 10
Side and it is connected with the volute tongue portion 11 of spiral case 10, the other end is connected with the air inlet 101 of wheel disc 1.In the present embodiment, it takes turns
Disk 1 and multiple fan blades 2 are all made of hollow structure, wheel disc 1 be made into hollow structure, the negotiable pressure-air in the inside, and fan blade 2 with
Wheel disc 1 realizes connection.In addition, being used to the air in spiral case 10 importeding into leaf through volute tongue portion 11 by the drainage device 3 added
In wheel 20, the pressure-air for entering 100 the inside of inner cavity through air inlet 101 will spray after cavity 200 from venthole 201, high
After pressure air enters fan blade 2, is sprayed by the venthole 201 that 2 surface of fan blade is distributed, necessary air can be provided for flow separation zone
Compensation, to mitigate boundary layer separation, to reduce noise and hoisting wind pressure.Specifically, can be by the drainage device 3 added
Air in a part of spiral case 10, about 3% to 10% or so importing impellers are simultaneously sprayed through fan blade 2, can be impeller 20 with this
While high pressure air power is provided, cost can be substantially reduced, to improve the price competitiveness of product.
The blower of the present embodiment can reduce fan blade boundary layer fluid segregation phenomenon, and then significantly reduce blower and fume-exhausting
The noise of machine improves the indexs such as the wind pressure of range hood, improves user experience, promotes Products competitiveness.
Specifically, separation control can be divided into passive flowing control (Passive Flow Control, PFC) and active Flow
It controls (Active Flow Control, AFC).
Wherein, active separation control (Phase-compensation control) is by injecting controllable energy to flow field
Amount, can it is more flexible, accurately, effectively change flow regime, to reach better control effect, this is control science and stream
Mechanics intersect caused by a new research field, academicly with have very high researching value on engineer application.From
The impeller of heart blower, due to the unstability of separation bubble, can cause strong rotational noise, how to inhibit when rotation
Flow separation is a problem for having to solve during improving draught fan impeller performance, and active active separation control technology is solution
Certainly one of the most effective means of these problems.
In background technique, the impeller of range hood is when rotation, windward side and back of the meeting in the impeller of range hood
Wind face forms very strong barometric gradient, will cause serious boundary layer fluid segregation phenomenon, this phenomenon tested and
The verifying of analogue simulation, according to the wheel disc pressure schematic cross-section of analogue simulation, it is possible to find deposited in fan blade windward side and leeward
In many flow separations.The present invention uses for reference the thinking of wherein active control, carries out innovation to the impeller of existing range hood and sets
Meter, reduces the boundary layer flow segregation phenomenon of fan blade.
In the present embodiment, drainage device 3 includes main pipeline 31 and multiple subtubes 32, and multiple subtubes 32 are set to supervisor
Close to the one end in volute tongue portion 11, main pipeline 31 is connected by multiple subtubes 32 with the volute tongue portion 11 of spiral case 10 in road 31.Snail
The air of 10 the inside of shell is drawn out to multiple subtubes 32 from volute tongue portion 11, and the air in multiple subtubes 32 converges to main pipeline
31, then air passes through the inflow of main pipeline 31 20, simple and reasonable for structure, and drainage effect can be improved.
Preferably, the pressure maximum position in volute tongue portion 11 will be arranged in subtube 32, can be looked for by simulation calculation and test
To the pressure maximum position in volute tongue portion.Pass through simulation calculation and test, it is possible to find there are apparent negative pressuren zones around impeller.Due to
Volute tongue portion 11 is zone of positive pressure, is negative pressuren zone around impeller, can form flowing naturally, therefore the drainage device 3 of the present embodiment can
To provide required air force for impeller.
Impeller border negative pressure distribution be it is different, some position negative pressure are big, and some position negative pressure are small, by this implementation
The drainage device 3 of example can compensate automatically automatically according to the pressure size of negative pressuren zone.Principle is that negative pressuren zone pressure is smaller, then position at this
Set bigger with the pressure difference of volute tongue, then flow velocity is faster, spray it is more, compensate it is more, otherwise still.
In addition, the high pressure Producing reason in volute tongue portion 11 is that impeller rotation leads to gas shock volute tongue portion 11, snail can be brought
The impact noise and impeller rotational noise of tongue.Volute tongue portion locations of high pressure be arranged drainage device 3, on the one hand can to impact air-flow into
Row guidance is allowed to flow into bypass drainage device, and then reduces impact of the air-flow to volute tongue portion, on the other hand can reduce volute tongue height
Pressure, reduces the barometric gradient in volute tongue portion and impeller, and then can reduce impeller rotational noise.
Preferably, the air inlet 101 of wheel disc 1 is connected with air inlet pipe 4, and the other end and air inlet pipe 4 of main pipeline 31 are clamped.Tool
Body, the other end of main pipeline 31 is provided with interior buckle, 4 end of air inlet pipe is provided with outer buckle, the interior buckle and institute
It states wild card buckle to connect, structure is simple, easy to connect, reliable.
In addition, it is filled with lubriation material in the junction of main pipeline 31 and air inlet pipe 4, it can be easy to disassemble with this, and
Air-tightness can be improved to a certain extent.
Preferably, fan blade 2 is aerofoil profile fan blade, is improved by the blade profile to fan blade 2, becomes the wing from thin sheet like plate structure
Type fan blade can weaken the segregation phenomenon in advance in boundary layer with this.
Further, fan blade 2 has windward side 21 and leeward 22, offers on windward side 21 and on leeward 22
Venthole 201, and the quantity of venthole 201 is less than the quantity of venthole 201 on leeward 22 on windward side 21.By emulation mould
Quasi- result it is found that fan blade 2 leeward 22, flow separation is stronger, and 21 flow separation of windward side of fan blade 2 is weaker, therefore sets
The quantity for counting the venthole 201 of the leeward 22 of fan blade 2 is relatively more, and the quantity of the venthole 201 of windward side 21 is relatively
It is few, flow is supplemented to provide different additional airs, preferably mitigates boundary layer separation.
Further, air-flow is respectively formed in 2 two sides of fan blade and flows into position and air-flow outflow position, in the back of fan blade 2
Wind face 22, air-flow flow into 201 quantity of venthole at position more than 201 quantity of venthole at air-flow outflow position, in fan blade 2
Windward side 21, it is suitable that air-flow flows into 201 quantity of venthole that 201 quantity of venthole and air-flow at position flow out at position.
By simulation results it is found that being different in the air-flow inflow position of fan blade 2 and the degree of air-flow outflow location boundary layer separation
Sample, while the separation degree of windward side 21 and leeward 22 is also different, specifically, in the leeward 22 of fan blade 2
It is serious that air-flow flows into the outflow location boundary layer separation of location boundary layer segregation ratio air-flow, therefore in the gas of the leeward of fan blade 2 22
Stream flows into 201 quantity of venthole at position more than 201 quantity of venthole at air-flow outflow position.And in 2 windward side of fan blade
21 from air-flow flow into position to air-flow outflow location boundary layer separation be almost the same, therefore on the windward side of fan blade 2 21
The venthole 201 of settable equalization.
It in the present embodiment, further include the first end ring 41 and the second end ring 42, the first end ring 41, wheel disc 1 and the second end ring
42 interval settings, have been provided at circumferentially spaced fan blade 2 between the first end ring 41 and wheel disc 1, each fan blade 2 respectively with the first end ring
41 are connected with wheel disc 1；Be provided at circumferentially spaced fan blade 2 between wheel disc 1 and the second end ring 42, each fan blade 2 respectively with wheel disc 1
Be connected with the second end ring 42, design it is simple, ingenious, while reducing noise can hoisting wind pressure, bring use to consumer
The promotion of experience.
Embodiment two: as shown in figure 5, the present embodiment provides a kind of range hood, having the blower as described in embodiment one,
Its noise is small, can promote the usage experience of user.
Preferably, range hood has cabinet 5, and blower is set to 5 the inside of cabinet.
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 (9)
1. a kind of blower, including spiral case (10) and impeller (20), the impeller (20) is set to inside the spiral case (10), wherein
The impeller (20) includes wheel disc (1) and multiple fan blades (2), circumferentially-spaced setting of multiple fan blades (2) along the wheel disc (1)
It sets, which is characterized in that further include drainage device (3), inner cavity (100) is offered in the wheel disc (1) and in the wheel disc
(1) air inlet (101) being connected to the inner cavity (100) is offered on, and cavity (200) is offered in the fan blade (2) simultaneously
And the venthole (201) being connected to the cavity (200) is offered on the surface of the fan blade (2), the inner cavity of the wheel disc (1)
(100) it is connected with the cavity (200) of the fan blade (2), described drainage device (3) one end is set on the outside of the spiral case (10)
And it is connected with the volute tongue portion (11) of the spiral case (10), the other end is connected with the air inlet (101) of the wheel disc (1).
2. a kind of blower according to claim 1, which is characterized in that the drainage device (3) include main pipeline (31) and
Multiple subtubes (32), multiple subtubes (32) are set to the main pipeline (31) close to the one of the volute tongue portion (11)
End, the main pipeline (31) are connected by multiple subtubes (32) with the volute tongue portion (11) of the spiral case (10).
3. a kind of blower according to claim 2, which is characterized in that the air inlet (101) of the wheel disc (1) be connected with into
Tracheae (4), the other end of the main pipeline (31) and the air inlet pipe (4) are clamped.
4. a kind of blower according to claim 3, which is characterized in that in the other end of the main pipeline (31) is provided with
Buckle is provided with outer buckle in the air inlet pipe (4) end, and the interior buckle connects with the wild card buckle.
5. a kind of blower according to claim 4, which is characterized in that in the main pipeline (31) and the air inlet pipe (4)
Junction be filled with lubriation material.
6. a kind of blower according to any one of claims 1 to 5, which is characterized in that the fan blade (2) is aerofoil profile fan blade.
7. a kind of blower according to any one of claims 1 to 6, which is characterized in that the fan blade (2) has windward side (21)
It with leeward (22), is offered on windward side (21) and venthole (201) on leeward (22), and on windward side (21)
Quantity of the quantity of venthole (201) less than venthole (201) on leeward (22).
8. a kind of blower according to claim 7, which is characterized in that be respectively formed air-flow stream in the fan blade (2) two sides
Enter position and air-flow outflow position, the leeward (22) in the fan blade (2), air-flow flows into venthole (201) number at position
Amount is more than venthole (201) quantity at air-flow outflow position；
In the windward side (21) of the fan blade (2), air-flow is flowed at venthole (201) quantity at position and air-flow outflow position
Venthole (201) quantity it is suitable.
9. a kind of range hood, which is characterized in that have blower as described in any of the claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147707.8A CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147707.8A CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109882447A true CN109882447A (en) | 2019-06-14 |
| CN109882447B CN109882447B (en) | 2024-05-10 |
Family
ID=66929813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147707.8A Active CN109882447B (en) | 2019-02-27 | 2019-02-27 | Fan and range hood with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109882447B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114251280A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251289A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and volute tongue and range hood thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710606A1 (en) * | 1997-03-14 | 1998-09-17 | Behr Gmbh & Co | Fan, especially for cooler of internal combustion engine |
| CN101968065A (en) * | 2010-10-15 | 2011-02-09 | 南京埃科净化技术有限公司 | High-efficiency fan filter unit |
| DE102012102145A1 (en) * | 2011-03-14 | 2012-09-20 | Minebea Co., Ltd. | Impeller for use in e.g. turbo fan utilized for ventilation of e.g. different objects, has blades whose high pressure surface exhibits circular arcs when high pressure surface is viewed from rotational axis |
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross flow fan, air conditioner |
| CN210196125U (en) * | 2019-02-27 | 2020-03-27 | 华帝股份有限公司 | Fan and range hood with same |
-
2019
- 2019-02-27 CN CN201910147707.8A patent/CN109882447B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710606A1 (en) * | 1997-03-14 | 1998-09-17 | Behr Gmbh & Co | Fan, especially for cooler of internal combustion engine |
| CN101968065A (en) * | 2010-10-15 | 2011-02-09 | 南京埃科净化技术有限公司 | High-efficiency fan filter unit |
| DE102012102145A1 (en) * | 2011-03-14 | 2012-09-20 | Minebea Co., Ltd. | Impeller for use in e.g. turbo fan utilized for ventilation of e.g. different objects, has blades whose high pressure surface exhibits circular arcs when high pressure surface is viewed from rotational axis |
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
| CN108457906A (en) * | 2018-05-31 | 2018-08-28 | 珠海格力电器股份有限公司 | Volute tongue, cross flow fan, air conditioner |
| CN210196125U (en) * | 2019-02-27 | 2020-03-27 | 华帝股份有限公司 | Fan and range hood with same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114251280A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251289A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and volute tongue and range hood thereof |
| CN114251289B (en) * | 2020-09-25 | 2022-08-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and volute tongue and range hood thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109882447B (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109882447A (en) | Fan and range hood with same | |
| CN105089465B (en) | A kind of ventilation purifier | |
| CN204268537U (en) | A kind of range hood | |
| CN103062112A (en) | Road cleaning unit and centrifugal fan impeller thereof | |
| CN109763996A (en) | Impeller, fan and range hood | |
| CN206206263U (en) | A kind of impeller of air blower | |
| CN104613009B (en) | Reversible axial flow fan blade with air blowing grooves | |
| CN206874553U (en) | Impeller, blower fan and motor | |
| CN106194822A (en) | A kind of centrifugal pump closed type impeller and method for designing thereof | |
| CN206560585U (en) | A kind of air-blast device of lung ventilator | |
| CN109990328A (en) | A kind of range hood and its fan assembly | |
| CN205064369U (en) | Domestic breathing machine, fan and impeller thereof | |
| CN210196125U (en) | Fan and range hood with same | |
| CN109779969A (en) | Impeller, fan and range hood with supercharging device | |
| CN206845536U (en) | A kind of centrifugal blower fan blade wheel for range hood | |
| CN207750266U (en) | A kind of centrifugal blower | |
| CN104279188B (en) | Centrifugal fan and the air conditioner with it | |
| CN209501129U (en) | A kind of air filter | |
| CN209976883U (en) | Impeller, fan and range hood | |
| CN209976884U (en) | Impeller, fan and range hood with supercharging device | |
| CN208040786U (en) | A kind of improved bladeless fan | |
| CN205481216U (en) | Reposition of redundant personnel device and it has this reposition of redundant personnel to use device for range hood | |
| CN204082660U (en) | Centrifugal fan and there is its air conditioner | |
| CN207962776U (en) | A kind of range hood and its fan assembly | |
| CN204140487U (en) | Backward centrifugal impeller and centrifugal blower |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |