CN108457906A - Volute tongue, cross flow fan, air conditioner - Google Patents
Volute tongue, cross flow fan, air conditioner Download PDFInfo
- Publication number
- CN108457906A CN108457906A CN201810547447.9A CN201810547447A CN108457906A CN 108457906 A CN108457906 A CN 108457906A CN 201810547447 A CN201810547447 A CN 201810547447A CN 108457906 A CN108457906 A CN 108457906A
- Authority
- CN
- China
- Prior art keywords
- tongue
- drainage
- volute tongue
- channel
- drainage channel
- 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
- 230000008676 import Effects 0.000 claims description 15
- 230000004308 accommodation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
-
- 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
Abstract
A kind of volute tongue of present invention offer, cross flow fan, air conditioner.The volute tongue includes volute tongue ontology, the volute tongue ontology has drainage wall, tongue inner flow surface, drainage channel, the drainage channel is extended from the drainage wall to the tongue inner flow surface, to guide the airflow portion at the drainage wall into the tongue inner flow surface, the drainage channel at least two, at least two drainage channel are set gradually along the radial direction of impeller.A kind of volute tongue according to the present invention, cross flow fan, air conditioner, the type different especially suitable for rotating speed have wider wind speed accommodation, effectively reduce the noise of cross flow fan.
Description
Technical field
The invention belongs to air-conditioning technique fields, and in particular to a kind of volute tongue, cross flow fan, air conditioner.
Background technology
All the time, volute tongue noise is a major issue for influencing cross flow fan noise, for this using single tonifying Qi
Tongue air-flow is adjusted in channel, but for different types, rotation speed change wider range, if logical only with single tonifying Qi
Road can not then show consideration for all ranges of speeds, and specifically showing consideration for high rotating speed, then slow-speed of revolution fan capacity can be affected, and show consideration for
Then high rotating speed noise can not effectively inhibit middle and slow speed of revolution, it is therefore desirable to more air supply passages that wider range air-flow is adjusted can be achieved
Gas supplementary structure.
Invention content
Therefore, the technical problem to be solved in the present invention is to provide a kind of volute tongue, cross flow fan, air conditioner, particularly suitable
In the different type of rotating speed, there is wider wind speed accommodation, effectively reduce the noise of cross flow fan.
To solve the above-mentioned problems, the present invention provides a kind of volute tongue, including volute tongue ontology, and the volute tongue ontology has drainage
Wall, tongue inner flow surface, drainage channel, the drainage channel are extended from the drainage wall to the tongue inner flow surface, will be described
Airflow portion at drainage wall guides the tongue inner flow surface, the drainage channel at least two, at least two drainage into
Channel is set gradually along the radial direction of impeller.
Preferably, the drainage channel is radially no more than a along impeller.
Preferably, it is the first plane perpendicular to the plane of the axis of impeller 2, the drainage wall 11, tongue inner flow surface 12 are logical
The connection of airflow diversion face 17 is crossed, the projection on the first plane of the airflow diversion face 17 forms the first circular arc, by described the
The center of one circular arc has the first line segment, and for first line segment perpendicular to the drainage wall 11, the drainage wall 11 is flat first
The projection in face forms second line segment, and first line segment intersects at first point with second line segment, the drainage wall 11 from first point
It is L that rise has the first length along air-out direction, and it is first interval that the drainage wall 11 within the scope of 0-60%L is lighted from first, described
The import 131 with the drainage channel 13 on wall 11 is drained, the import 131 is arranged in the first interval.
Preferably, the first interval includes second interval, and it is the to light drainage wall 11 within the scope of 0-40%L from first
Two sections, the import 131 are arranged in the second interval.
Preferably, the drainage channel is curved channel.
Preferably, the drainage channel 13 has the first tangent line, first tangent line and close leaf at the import 131
The drainage wall for taking turns side forms air-flow deflection angle A, 0 ° of 90 ° of ＜ A ＜.
Preferably, 0 ° of 50 ° of ＜ A ＜.
Preferably, the drainage channel 13 is at least three, and at least three drainage channel 13 is along 2 axial direction of impeller
It is staggered on the drainage wall 11.
Preferably, the drainage channel 13 is at least three, and at least three drainage channel 13 is along air-out direction in institute
It states staggered on drainage wall 11.
Preferably, the volute tongue ontology includes at least the first tongue body, the second tongue body, third tongue body, first tongue body, the
Two tongue bodies, third tongue body are radially arranged in order in impeller, and the drainage channel includes at least first passage, second channel, institute
It states and forms first passage between the first tongue body, the second tongue body, second channel is formed between second tongue body, third tongue body.
Preferably, first tongue body, can be relative to second tongue body along impeller radial motion, to beat on or off
The first passage is closed, and/or, second tongue body can be relative to the third tongue body along impeller radial motion, to open
Or close the second channel.
The present invention also provides a kind of cross flow fans, including above-mentioned volute tongue.
The present invention also provides a kind of air conditioners, including above-mentioned cross flow fan.
A kind of volute tongue provided by the invention, cross flow fan, air conditioner, the drainage channel at least two, and at least two
A drainage channel is set gradually along the radial direction of the impeller, to enable the air-flow of the impeller output at least two
The entrance of a drainage channel is guided by drainage wall at tongue inner flow surface, and finally between impeller and tongue inner flow surface
The circumferential rotating speed of impeller is reduced at the small spacing of tongue, to reduce the noise of its air conditioner of cross flow fan or even application,
What is more important, the different location due to the drainage channel in drainage wall introduce air-flow at the small spacing of volute tongue, make described
Drainage channel is wider array of in wind speed (this is positively correlated with wheel speed) range, is more advantageous to the circumferential direction for adjusting the impeller
Rotating speed.
Description of the drawings
Fig. 1 is the structural schematic diagram of the volute tongue of the embodiment of the present invention；
Fig. 2 is the partial structural diagram of volute tongue drainage wall in the directions B along Fig. 1 of the embodiment of the present invention；
Fig. 3 is the partial structural diagram of volute tongue drainage wall in the directions B along Fig. 1 of another embodiment of the present invention；
Fig. 4 is the partial structural diagram of volute tongue drainage wall in the directions B along Fig. 1 of yet another embodiment of the invention；
Fig. 5 is the partial structural diagram of volute tongue drainage wall in the directions B along Fig. 1 of further embodiment of this invention；
Fig. 6 is associated change of the outlet air in the wind speed for draining wall surface and drainage wall length of the volute tongue of the embodiment of the present invention
Curve；
Fig. 7 is the drainage channel air outlet speed of the volute tongue of the embodiment of the present invention and the associated change song of drainage channel length
Line.
Reference numeral is expressed as：
1, volute tongue ontology；11, wall is drained；12, tongue inner flow surface；13, drainage channel；131, import；133, first passage；
134, second channel；14, the first tongue body；15, the second tongue body；16, third tongue body；17, airflow diversion face；2, impeller；3, volute tongue
Small spacing.
Specific implementation mode
In conjunction with referring to shown in Fig. 1 to 7, according to an embodiment of the invention, a kind of volute tongue, including volute tongue ontology 1 are provided, it is described
Volute tongue ontology 1 have drainage wall 11, tongue inner flow surface 12, drainage channel 13, the drainage channel 13 from the drainage wall 11 to
The tongue inner flow surface 12 extends, and guides the airflow portion at the drainage wall 11 into the tongue inner flow surface 12, described to draw
Circulation road 13 at least two, at least two drainage channel 13 are set gradually along the radial direction of impeller 2.In the technical solution,
The drainage channel 13 at least two, and at least two drainage channels 13 are set gradually along the radial direction of the impeller 2,
To which the air-flow for enabling the impeller 2 to export is drawn at the import 131 of at least two drainage channels 13 by drainage wall 11
By the circumferential direction of impeller 2 at the small spacing of tongue at tongue inner flow surface 12, and finally between impeller 2 and tongue inner flow surface 12 3
Rotating speed reduces, to reduce the noise of its air conditioner of cross flow fan or even application, it is even more important that due to the drainage
Channel 13 introduces air-flow at the small spacing of volute tongue 3 in the different location of drainage wall 11, make the drainage channel 13 wind speed (this just
It is relevant to 2 rotating speed of impeller) in the case of range is wider array of, it is more advantageous to the circumferential rotating speed for adjusting the impeller 2.
Certainly, in order to make noise further decrease, the drainage channel 13 can be arranged more along the radial of impeller 2
Number, such as 4 to 6, but due to when the setting number of the drainage channel 13 is excessive, being then easy to cause two neighboring described
Volute tongue ontology 1 between drainage channel 13 is excessively thin, the rigidity and intensity of volute tongue ontology 1 is will also decrease, it is therefore preferred that described
Drainage channel 13 is radial no more than 5 along impeller 2.
(surface wind speed unit is m/s in Fig. 6, and drainage wall is mm along journey length unit) can be apparent from by Fig. 6, with
The length for draining wall 11 increases, and the surface wind speed of the outlet air air-flow of impeller 2 on the drainage wall 11 gradually reduces, and therefore, is
Increase influence degree of the airflow reflux to the circumferential rotating speed of the impeller 2, the opening 131 of the drainage channel 13 should be arranged
In the drainage wall 11 in the region of 2 side of impeller, specifically, the plane perpendicular to the axis of impeller 2 is the first plane,
The drainage wall 11, tongue inner flow surface 12 are connected by airflow diversion face 17, and the airflow diversion face 17 is on the first plane
Projection forms the first circular arc, by the center of first circular arc there is the first line segment, first line segment to draw perpendicular to described
Wall 11 is flowed, the drainage wall 11 forms second line segment in the projection of the first plane, and first line segment is intersected at second line segment
First point, the drainage wall 11 is lighted from first has the first length for L along air-out direction, and 0-60%L ranges are lighted from first
Interior drainage wall 11 is first interval, the import 131 with the drainage channel 13 on the drainage wall 11, the import 131
It is arranged in the first interval.Further, the first interval includes second interval, and 0-40%L models are lighted from first
Drainage wall 11 in enclosing is second interval, and the import 131 is arranged in the second interval.
(it is m/s to go out to flow wind speed unit in Fig. 7, and drainage channel length unit is mm) can be apparent from by Fig. 7, with drainage
The increase of the length in channel 13, air-flow go out to flow wind speed and will gradually reduce, and basic reason is, as the drainage channel 13 is grown
The increase of degree will increase the on-way resistance of air-flow, therefore air-flow goes out to flow wind speed and associatedly gradually reduces, in order to
The on-way resistance of the drainage channel 13 is reduced as far as possible, it is preferable that the drainage channel 13 is curved channel, certainly herein
Curved channel can be multistage different curvature radius camber line round and smooth junction curve, and the smooth curve should be toward leaf
The curving of wheel 2, further, using single-curvature radius camber line then more preferably, at this point, the drainage channel 13 along journey
Resistance will further decrease, this can undoubtedly further increase the air-flow in drainage channel 13 to the gas at the small spacing of volute tongue 3
Stream influences, and then further decreases the noise that the cross flow fan is waited at runtime.
In order to fully utilize the outlet air wind speed of impeller 2, it is preferable that the drainage channel 13 has at the import 131
There are the first tangent line, first tangent line to form air-flow deflection angle A, 0 ° of ＜ A ＜ with the drainage wall 11 close to 2 side of impeller
90 °, moreover 0 ° of 50 ° of ＜ A ＜, more specifically, the A is closer to 0 °, and the outlet air of the impeller 2 is in import
Wind speed at 131 is higher, and the circumferential rotating speed of impeller 2 undoubtedly will be further reduced in this, is more conducive to reduction through-flow certainly
The noise of wind turbine or even air conditioner.
Arrangement mode of at least two drainage channels 13 on the drainage wall 11 can be a variety of, draw as described
Circulation road 13 is at least three, and at least three drainage channel 13 interlocks along 2 axial direction of impeller on the drainage wall 11
Arrangement, and or, the drainage channel 13 is at least three, at least three drainage channel 13 is along air-out direction in the drainage
Staggered on wall 11, further, the distance between two drainage channels 13 adjacent to each other can be equal, also may be used
To be, this be conducive to during the manufacturing according to different fan performances to the spacing of the drainage channel 13 into
The necessary adjustment of row, has stronger specific aim, is more conducive to the noise for reducing cross flow fan.
For the drainage channel 13, a kind of generation type can be using directly being set on the volute tongue ontology 1
The form in channel is set, the position of this mode is relatively fixed, and another way can be, the volute tongue ontology 1 includes at least the
One tongue body 14, the second tongue body 15, third tongue body 16, first tongue body 14, the second tongue body 15, third tongue body 16 are in 2 diameter of impeller
It is arranged in order upwards, the drainage channel 13 includes at least first passage 133, second channel 134, first tongue body 14, the
First passage 133 is formed between two tongue bodies 15, and second channel 134 is formed between second tongue body 15, third tongue body 16.
Closing in order to adjust the drainage channel 13 in real time when the cross flow fan operates is opened, preferably
Ground, first tongue body 14, can be described to open or close relative to second tongue body 15 along 2 radial motion of impeller
First passage 133, and/or, second tongue body 15 can be relative to the third tongue body 16 along 2 radial motion of impeller, to beat
On or off closes the second channel 134, and specifically, first tongue body 14, the second tongue body 15, third tongue body 16 can all be set
It sets on a common pedestal, and using cunning between first tongue body 14, the second tongue body 15, third tongue body 16 and pedestal
Dynamic connection generates phase as described in motor control by driving device between the first tongue body 14, the second tongue body 15, third tongue body 16
To movement, for another example first tongue body 14, the second tongue body 15, third tongue body 16 are flush-mounted in one, such as the first tongue body 14 each other
In the second tongue body 15, second tongue body 15 is flush-mounted in the third tongue body 16, first tongue body 14, the second tongue
Body 15, third tongue body 16 are still driven by driving device, make first tongue body 14, the second tongue body 15, third tongue body 16 it
Between generate relative motion, so it is easy to understand that first tongue body 14 of relative motion, the second tongue body 15, third tongue body 16 will
The first passage 133 between them, second channel 134 is caused to open or close as needed.
According to an embodiment of the invention, a kind of cross flow fan, including above-mentioned volute tongue are also provided, as a result of above-mentioned
Volute tongue, in the running noise effectively reduced.
According to an embodiment of the invention, a kind of air conditioner, including above-mentioned cross flow fan are also provided, as a result of above-mentioned
Cross flow fan, in the running noise effectively reduced.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Protect range.
Claims (13)
1. a kind of volute tongue, which is characterized in that including volute tongue ontology (1), the volute tongue ontology (1) has drainage wall (11), tongue
Inner flow surface (12), drainage channel (13), the drainage channel (13) is from the drainage wall (11) to the tongue inner flow surface (12)
Extend, guides the airflow portion at the drainage wall (11) into the tongue inner flow surface (12), the drainage channel (13) is extremely
It it is less two, at least two drainage channel (13) sets gradually along the radial direction of impeller (2).
2. volute tongue according to claim 1, which is characterized in that the drainage channel (13) is radially no more than 5 along impeller (2)
It is a.
3. volute tongue according to claim 1, which is characterized in that the plane perpendicular to the axis of impeller (2) is the first plane,
The drainage wall (11), tongue inner flow surface (12) are connected by airflow diversion face (17), and the airflow diversion face (17) is first
Projection in plane forms the first circular arc, has the first line segment, first line segment vertical by the center of first circular arc
In the drainage wall (11), the drainage wall (11) forms second line segment in the projection of the first plane, first line segment and the
Two line segments intersect at first point, and the drainage wall (11) is lighted from first has the first length for L along air-out direction, from first point
It is first interval to play the drainage wall (11) within the scope of 0-60%L, with the drainage channel (13) on the drainage wall (11)
Import (131), the import (131) are arranged in the first interval.
4. volute tongue according to claim 3, which is characterized in that the first interval includes second interval, is lighted from first
Drainage wall (11) within the scope of 0-40%L is second interval, and the import (131) is arranged in the second interval.
5. volute tongue according to claim 3, which is characterized in that the drainage channel (13) is curved channel.
6. volute tongue according to claim 4, which is characterized in that the drainage channel (13) has at the import (131)
There are the first tangent line, first tangent line to form air-flow deflection angle A, 0 ° of ＜ A with the drainage wall (11) close to impeller (2) side
90 ° of ＜.
7. volute tongue according to claim 6, which is characterized in that 0 ° of 50 ° of ＜ A ＜.
8. volute tongue according to any one of claim 1 to 7, which is characterized in that the drainage channel (13) is at least three
A, at least three drainage channel (13) is staggered on the drainage wall (11) along impeller (2) axial direction.
9. volute tongue according to any one of claim 1 to 7, which is characterized in that the drainage channel (13) is at least three
A, at least three drainage channel (13) is staggered on the drainage wall (11) along air-out direction.
10. volute tongue according to any one of claim 1 to 7, which is characterized in that the volute tongue ontology (1) includes at least
First tongue body (14), the second tongue body (15), third tongue body (16), first tongue body (14), the second tongue body (15), third tongue body
(16) it is radially arranged in order in impeller (2), the drainage channel (13) includes at least first passage (133), second channel
(134), first passage (133), second tongue body (15), the are formed between first tongue body (14), the second tongue body (15)
Second channel (134) is formed between three tongue bodies (16).
11. volute tongue according to claim 10, which is characterized in that first tongue body (14), can be relative to described
Two tongue bodies (15) are along impeller (2) radial motion, to open or close the first passage (133), and/or, second tongue
Body (15) can be relative to the third tongue body (16) along impeller (2) radial motion, to open or close the second channel
(134)。
12. a kind of cross flow fan, including volute tongue, which is characterized in that the volute tongue is described in any one of claim 1 to 11
Volute tongue.
13. a kind of air conditioner, including cross flow fan, which is characterized in that the cross flow fan is the through-flow described in claim 12
Wind turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810547447.9A CN108457906B (en) | 2018-05-31 | 2018-05-31 | Volute tongue, cross-flow fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810547447.9A CN108457906B (en) | 2018-05-31 | 2018-05-31 | Volute tongue, cross-flow fan and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108457906A true CN108457906A (en) | 2018-08-28 |
| CN108457906B CN108457906B (en) | 2023-11-24 |
Family
ID=63215804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810547447.9A Active CN108457906B (en) | 2018-05-31 | 2018-05-31 | Volute tongue, cross-flow fan and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108457906B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882447A (en) * | 2019-02-27 | 2019-06-14 | 华帝股份有限公司 | Fan and range hood with same |
| CN114440316A (en) * | 2022-01-30 | 2022-05-06 | 广东美的暖通设备有限公司 | Air duct assembly and air conditioning equipment with same |
| CN114636197A (en) * | 2022-03-31 | 2022-06-17 | 广东美的白色家电技术创新中心有限公司 | Cross-flow fan and air conditioner |
| WO2023103118A1 (en) * | 2021-11-30 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute structure, air duct component, and air conditioner |
| CN109882447B (en) * | 2019-02-27 | 2024-05-10 | 华帝股份有限公司 | Fan and range hood with same |
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| GB191214668A (en) * | 1911-06-23 | 1912-11-14 | Aegidius Elling | Improvements in Turbo-pumps or Fans. |
| GB876611A (en) * | 1956-12-07 | 1961-09-06 | Firth Cleveland Ltd | Improvements in or relating to machines for inducing flow of fluid for example pumpsand blowers |
| US3522994A (en) * | 1967-05-18 | 1970-08-04 | Kurt Zenkner | Vacuum cleaner |
| US5286162A (en) * | 1993-01-04 | 1994-02-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of reducing hydraulic instability |
| FR2906581A3 (en) * | 2006-09-29 | 2008-04-04 | Renault Sas | Pump i.e. rotating centrifugal pump, body for engine cooling system, has volute tongue traversed by channel connecting high and low pressure field zones that are located in diversion part and in collector respectively |
| CN105626581A (en) * | 2016-02-22 | 2016-06-01 | 清华大学 | Stress application centrifugal pump with pressurization hole |
| CN208252438U (en) * | 2018-05-31 | 2018-12-18 | 珠海格力电器股份有限公司 | Volute tongue, cross flow fan, air conditioner |
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| GB191214668A (en) * | 1911-06-23 | 1912-11-14 | Aegidius Elling | Improvements in Turbo-pumps or Fans. |
| GB876611A (en) * | 1956-12-07 | 1961-09-06 | Firth Cleveland Ltd | Improvements in or relating to machines for inducing flow of fluid for example pumpsand blowers |
| US3522994A (en) * | 1967-05-18 | 1970-08-04 | Kurt Zenkner | Vacuum cleaner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882447A (en) * | 2019-02-27 | 2019-06-14 | 华帝股份有限公司 | Fan and range hood with same |
| CN109882447B (en) * | 2019-02-27 | 2024-05-10 | 华帝股份有限公司 | Fan and range hood with same |
| WO2023103118A1 (en) * | 2021-11-30 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute structure, air duct component, and air conditioner |
| CN114440316A (en) * | 2022-01-30 | 2022-05-06 | 广东美的暖通设备有限公司 | Air duct assembly and air conditioning equipment with same |
| WO2023142932A1 (en) * | 2022-01-30 | 2023-08-03 | 广东美的暖通设备有限公司 | Air channel assembly and air conditioning device having same |
| CN114440316B (en) * | 2022-01-30 | 2024-02-27 | 广东美的暖通设备有限公司 | Air duct assembly and air conditioning equipment with same |
| CN114636197A (en) * | 2022-03-31 | 2022-06-17 | 广东美的白色家电技术创新中心有限公司 | Cross-flow fan and air conditioner |
| CN114636197B (en) * | 2022-03-31 | 2023-09-08 | 广东美的白色家电技术创新中心有限公司 | Cross-flow fan and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108457906B (en) | 2023-11-24 |
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