CN109236716A - A kind of fan blade electric adjusting mechanism and blower - Google Patents
A kind of fan blade electric adjusting mechanism and blower Download PDFInfo
- Publication number
- CN109236716A CN109236716A CN201811356629.4A CN201811356629A CN109236716A CN 109236716 A CN109236716 A CN 109236716A CN 201811356629 A CN201811356629 A CN 201811356629A CN 109236716 A CN109236716 A CN 109236716A
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- Prior art keywords
- fan blade
- hub
- adjusting mechanism
- wheel hub
- electric adjusting
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- 230000007246 mechanism Effects 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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- 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
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of fan blade electric adjusting mechanism and blower, belongs to axial flow blower technical field.It includes wheel hub, hub, multiple blades, transmission component and driving assembly；Hub is mounted on wheel hub；Transmission component is installed in rotation on wheel hub, and the other end is connect with multiple vane belts；Multiple blades are uniformly distributed in the circumferential direction of hub；Driving assembly and transmission component are sequentially connected, and driving assembly adjusts the angle of multiple blades by the rotation of driving transmission component.Transmission component is built in wheel hub, driving assembly realizes the adjustment of the angle of multiple blades by driving transmission component rotation, and integrally-built stability is strong.
Description
Technical field
The present invention relates to axial flow blower technical field more particularly to a kind of fan blade electric adjusting mechanisms and blower.
Background technique
Axial flow blower is industrially widely used in the gas flows such as thermal power generation, steel, chemical industry, environmentally friendly exhaust-gas treatment
The continuous work occasion for needing dynamic regulation to change.Mechanical energy is converted by impeller rotation acting when such propeller fan works
For gas kinetic energy；Change guide vane or blade angle, or changes wheel speed and control gas flow.It is according to angle in blade working
No variation can be divided into two major classes: stator blade blower and movable vane blower, wherein movable vane blower is divided into adjusting rotor blade blower and movable vane not again
Adjustable fan (is just adjustable blade angle) after shutdown.
Blade angle is adjusted using hydraulic device in the prior art, since revolving speed is big, due to vibration etc., leads in blower work
Regulating device is caused often to will appear hydraulic oil leakage and mechanism the problems such as stability is poor in operation.
Summary of the invention
The purpose of the present invention is to provide a kind of fan blade electric adjusting mechanism and blowers, it is intended to solve in the prior art
Hydraulic device adjusts the problem of the stability difference of blade angle.
To achieve the above object, the technical scheme is that
A kind of fan blade electric adjusting mechanism, the fan blade electric adjusting mechanism include wheel hub, hub, Duo Geye
Piece, transmission component and driving assembly；
The hub is mounted on the wheel hub；
The transmission component is installed in rotation on the wheel hub, and the other end is connect with multiple vane belts；
Multiple blades are uniformly distributed in the circumferential direction along the wheel hub；
The driving component and the transmission component are sequentially connected, and the driving component is by driving the transmission component rotation
Transfer the angle for adjusting multiple blades.
As a preferred technical solution of the present invention, the transmission component includes multiple sharfs, multiple bevel pinions
And connector；Multiple sharfs are installed in rotation on respectively on the wheel hub, one end of multiple sharfs with
Multiple bevel pinion connections, the other end are connect with multiple vane belts；The other end of multiple bevel pinions with
The connector engagement；One end of the connector is installed in rotation on the hub, the other end and the driving component
Transmission connection.
As a preferred technical solution of the present invention, the transmission component includes bearing combination, multiple sharfs
It is combined by the bearing and is rotatably coupled with the wheel hub respectively.
As a preferred technical solution of the present invention, the connector includes dish type bevel gear, driving shaft and shaft coupling
Device, one end of the driving shaft are installed in rotation on the hub, and the dish type bevel gear is mounted on the driving shaft,
One end of the shaft coupling is connect with the end face of the dish type bevel gear, and the other end and the driving component are sequentially connected.
As a preferred technical solution of the present invention, bearing saddle bore is offered on the hub, the one of the driving shaft
End is mounted in the bearing saddle bore.
As a preferred technical solution of the present invention, the fan blade electric adjusting mechanism includes support plate and shield
Cover, the support plate are mounted in side of the wheel hub far from the hub, and the shield is mounted on the wheel hub far from institute
It states on the side of hub.
As a preferred technical solution of the present invention, the driving component include retarder, motor, slip ring, connecting rod with
And power supply；The retarder is mounted in the support plate, and the slip ring is mounted on the shield；One end of the motor with
The retarder transmission connection, the other end are electrically connected with one end of the slip ring, the other end of the slip ring and the connecting rod
One end connection, the other end of the connecting rod are connect with the power supply.
As a preferred technical solution of the present invention, the other end of the motor passes through the terminal of electric wire and the slip ring
Electrical connection.
As a preferred technical solution of the present invention, the driving component includes angular transducer, the angle sensor
Device is mounted in the support plate, and the angular transducer passes through transmission line and is electrically connected with the terminal of the slip ring.
A kind of blower, the blower include above-described fan blade electric adjusting mechanism.Beneficial effects of the present invention
It is:
The present invention provides a kind of fan blade electric adjusting mechanism, fan blade electric adjusting mechanism include wheel hub, hub,
Multiple blades, transmission component and driving assembly；In the gear-driven fan blade adjustment structure, blade is mounted on blade
On one end of axis；Sharf is combined by bearing and is assembled together with wheel hub, and hub is fixed together with wheel hub, sharf
The other end connect with bevel pinion by flat key, dish type bevel gear nibbles with each bevel pinion being circumferentially distributed on hub
It closes, dish type bevel gear is fixedly mounted on driving shaft, and the other end of driving shaft is mounted in the bearing saddle bore of hub；Shaft coupling
One end is fixedly connected with the end face of dish type bevel gear, and the other end of shaft coupling is fixedly connected with the output shaft of retarder, support plate
It being fixedly mounted on wheel hub, retarder is fixedly mounted in support plate, and the output shaft of motor is connected with the input shaft of retarder, and
And the two is fixedly mounted on retarder；Meanwhile shield is fixedly mounted on hub far from the side of bearing saddle bore, slip ring is fixed
It is mounted on shield；Meanwhile the electric wire of motor and the terminal of slip ring connect；Angular transducer is fixedly mounted in support plate, and
And the transmission line of angular transducer and the terminal of slip ring connect, connecting rod is connected with the other end of slip ring by joint ball bearing, even
The other end of bar is connected with connecting rod base by joint ball bearing, and the lead of the slip ring other end is drawn by the inner hole of connecting rod, and with
Power electric connection.
The working principle of the structure is: the left end connection of driving shaft and hub on blower, and entire impeller is driven to rotate
Externally acting；External power is moved by cable along connecting rod, slip ring control and driving motor, motor by retarder reduction of speed and
Drive disk shape bevel gear moves after torque-increasing, and dish type bevel gear is fixed on driving shaft and makes rotating motion together, and drives
Circumferentially distributed each bevel pinion, bevel pinion drives sharf rotation, to realize the adjustment of blade angle；Meanwhile angle speed
Degree sensor directly measures the corner of dish type bevel gear, to obtain the aperture of blade indirectly.In total, support plate is used
In support retarder, retarder is used to support motor, and shield is used to support slip ring.
As a result, to realize that the running blade of axial flow blower is continuously adjustable, present invention use " connecting rod+slip ring+motor+
Retarder+bevel gear to " scheme；In the present solution, motor, retarder are built into hub, on the one hand, be not required to arrangement oil
The case where standing, i.e., will not generating hydraulic oil leakage, and then reduce pollution；On the other hand, power transmission is transmitted by slip ring and is realized,
Slip ring only realizes electric power and signal transmission, is not subject to radial force and axial force, abrasion is less and structural stability is good；Due to using
Slip ring is conductive, built-in rotary angle transmitter in the hub, turns accordingly, with respect to that can obtain accurate blade for the prior art
Angular data.
The present invention provides a kind of blower by above-mentioned design, which has above-mentioned fan blade electric adjusting mechanism,
Have the characteristics that structure is simple and stability is strong.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of fan blade electric adjusting mechanism provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the first angle of fan blade electric adjusting mechanism provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the second angle of fan blade electric adjusting mechanism provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the third angle of fan blade electric adjusting mechanism provided in an embodiment of the present invention.
Icon: 1- fan blade electric adjusting mechanism；2- wheel hub；3- hub；4- blade；5- transmission component；6- driving group
Part；7- sharf；8- bevel pinion；9- connector；The combination of 10- bearing；11- dish type bevel gear；12- driving shaft；13- shaft coupling
Device；14- support plate；15- shield；16- retarder；17- motor；18- slip ring；19- connecting rod；20- angular transducer.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention for usually describing and showing in attached drawing here is real
The component for applying example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term " on ", "lower" is base
In orientation or positional relationship shown in the drawings or the invention product using when the orientation or positional relationship usually put, only
It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, in the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the
Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy
Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level
Height is less than second feature.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Embodiment:
The present embodiment provides a kind of blowers comprising fan blade electric adjusting mechanism 1, specific structure is as follows to be explained
It states.
Please refer to Fig. 1, referring to Figure 2 to Figure 4, fan blade electric adjusting mechanism 1 includes wheel hub 2, hub 3, multiple for cooperation
Blade 4, transmission component 5 and driving assembly 6；Hub 3 is fixedly mounted on the hub 2；Transmission component 5 is installed in rotation on wheel
On hub 2, the other end and multiple blades 4 are sequentially connected；Multiple blades 4 are uniformly distributed in the circumferential direction along wheel hub 2；Driving group
Part 6 and transmission component 5 are sequentially connected, and driving assembly 6 adjusts the angle of multiple blades 4 by the rotation of driving transmission component 5.
Wherein, transmission component 5 includes multiple sharfs 7, multiple bevel pinions 8 and connector 9；Multiple sharfs 7 divide
Be not installed in rotation on wheel hub 2, one end of multiple sharfs 7 is fixedly connected with multiple bevel pinions 8, the other end with it is multiple
Blade 4 is sequentially connected；The other end of multiple bevel pinions 8 is engaged with connector 9；One end of connector 9 is installed in rotation on
On hub 3, the other end and driving assembly 6 are sequentially connected.
It should be noted that in the present embodiment, transmission component 5 includes bearing combination 10, and multiple sharfs 7 lead to respectively
Bearing combination 10 is crossed to be rotatably coupled with wheel hub 2.
Wherein, connector 9 includes dish type bevel gear 11, driving shaft 12 and shaft coupling 13, and one end of driving shaft 12 can turn
It is mounted on hub 3 dynamicly, dish type bevel gear 11 is fixedly mounted on driving shaft 12, one end of shaft coupling 13 and dish type bevel gear
11 end face connection, the other end and driving assembly 6 are sequentially connected.
It should be noted that in the present embodiment, bearing saddle bore is offered on hub 3, one end of driving shaft 12 be can be rotated
Ground is mounted in bearing saddle bore.
Fig. 1 is please referred to, referring to Fig. 2, fan blade electric adjusting mechanism 1 includes support plate 14 and shield 15, support for cooperation
Disk 14 is mounted in wheel hub 2, and shield 15 is mounted on wheel hub 2 far from the side of bearing saddle bore.
Fig. 1 is please referred to, driving assembly 6 includes retarder 16, motor 17, slip ring 18, connecting rod 19 and power supply；Retarder 16
It is fixedly mounted in support plate 14, slip ring 18 is fixedly mounted on shield 15；The output shaft and 16 input shaft of retarder of motor 17
Transmission connection, the electric wire of the other end of motor 17 are electrically connected with the terminal of one end of slip ring 18, the other end and connecting rod of slip ring 18
19 one end connection, the other end of connecting rod 19 are electrically connected to a power source.
It should be noted that in the present embodiment, the other end of motor 17 is electrically connected by electric wire with the terminal of slip ring 18.
It should be noted that in the present embodiment, driving assembly 6 further includes angular transducer 20, angular transducer 20 is pacified
In support plate 14, and the transmission line of angular transducer 20 is connect with the terminal of slip ring 18.
The working principle of the fan blade electric adjusting mechanism 1 is:
External power is controlled motor 17 and moved by cable along connecting rod 19, slip ring 18, and motor 17 is dropped by retarder 16
Drive disk shape bevel gear 11 moves after speed and torque-increasing, and dish type bevel gear 11 is fixed on driving shaft 12 does rotation fortune together
It is dynamic, and circumferentially distributed each bevel pinion 8 is driven, bevel pinion 8 drives sharf 7 to rotate, to realize the tune of 4 angle of blade
It is whole；Meanwhile angular-rate sensor directly measures the corner of dish type bevel gear 11, to obtain the aperture of blade 4 indirectly.Entire
In structure, support plate 14 is used to support retarder 16, and retarder 16 is used to support motor 17, and shield 15 is used to support slip ring 18.
As a result, to realize that the running blade 4 of axial flow blower is continuously adjustable, the present invention is using " connecting rod 19+ slip ring 18+ electricity
Machine 17+ retarder 16+ bevel gear to " scheme；In the present solution, motor 17, retarder 16 are built into wheel hub 2, on the one hand,
The case where being not required to arrangement petrol station, that is, being not in hydraulic oil leakage, and then reduce pollution；On the other hand, 18, slip ring realizations
Electric power and signal transmission, are not subject to radial force and axial force, the abrasion between components is less and structural stability is good；Due to using
Slip ring 18 is conductive, built-in rotary angle transmitter in the hub 3, accordingly, with respect to can obtain for the prior art accurately
4 angle data of blade.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a kind of fan blade electric adjusting mechanism, which is characterized in that the fan blade electric adjusting mechanism includes wheel hub, hub
Disk, multiple blades, transmission component and driving assembly；
The hub is mounted on the wheel hub；
The transmission component is installed in rotation on the wheel hub, and the other end is connect with multiple vane belts；
Multiple blades are uniformly distributed in the circumferential direction along the wheel hub；
The driving component and the transmission component are sequentially connected, the driving component by drive the transmission component rotation come
Adjust the angle of multiple blades.
2. fan blade electric adjusting mechanism according to claim 1, which is characterized in that the transmission component includes multiple
Sharf, multiple bevel pinions and connector；Multiple sharfs are installed in rotation on respectively on the wheel hub, multiple
One end of the sharf is connect with multiple bevel pinions, and the other end is connect with multiple vane belts；It is multiple described
The other end of bevel pinion is engaged with the connector；One end of the connector is installed in rotation on the hub, separately
One end and the driving component are sequentially connected.
3. fan blade electric adjusting mechanism according to claim 2, which is characterized in that the transmission component includes bearing
Combination, multiple sharfs pass through the bearing combination respectively and are rotatably coupled with the wheel hub.
4. fan blade electric adjusting mechanism according to claim 2, which is characterized in that the connector includes dish type cone
Gear, driving shaft and shaft coupling, one end of the driving shaft are installed in rotation on the hub, the dish type bevel gear
It is mounted on the driving shaft, one end of the shaft coupling is connect with the end face of the dish type bevel gear, the other end and the drive
Dynamic component transmission connection.
5. fan blade electric adjusting mechanism according to claim 4, which is characterized in that offer bearing on the hub
Bore, one end of the driving shaft are mounted in the bearing saddle bore.
6. fan blade electric adjusting mechanism according to claim 5, which is characterized in that the fan blade motorized adjustment
Mechanism includes support plate and shield, and the support plate is mounted in side of the wheel hub far from the hub, the shield peace
On side of the wheel hub far from the hub.
7. fan blade electric adjusting mechanism according to claim 6, which is characterized in that the driving component includes slowing down
Device, motor, slip ring, connecting rod and power supply；The retarder is mounted in the support plate, and the slip ring is mounted on the shield
On；One end of the motor and the retarder are sequentially connected, and the other end is electrically connected with one end of the slip ring, the slip ring
The other end is connect with one end of the connecting rod, and the other end of the connecting rod is connect with the power supply.
8. fan blade electric adjusting mechanism according to claim 7, which is characterized in that the other end of the motor passes through
Electric wire is electrically connected with the terminal of the slip ring.
9. fan blade electric adjusting mechanism according to claim 7, which is characterized in that the driving component includes angle
Sensor, the angular transducer are mounted in the support plate, the angular transducer by transmission line and with the slip ring
Terminal electrical connection.
10. a kind of blower, which is characterized in that the blower includes the described in any item fan blade electric adjustables of claim 1 to 9
Save mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811356629.4A CN109236716A (en) | 2018-11-14 | 2018-11-14 | A kind of fan blade electric adjusting mechanism and blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811356629.4A CN109236716A (en) | 2018-11-14 | 2018-11-14 | A kind of fan blade electric adjusting mechanism and blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109236716A true CN109236716A (en) | 2019-01-18 |
Family
ID=65075238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811356629.4A Pending CN109236716A (en) | 2018-11-14 | 2018-11-14 | A kind of fan blade electric adjusting mechanism and blower |
Country Status (1)
| Country | Link |
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| CN (1) | CN109236716A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236715A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of axial-flow fan blade regulating mechanism and blower |
| CN111472992A (en) * | 2020-04-15 | 2020-07-31 | 华中科技大学 | Device and method for adjusting rotating rope type movable blades of axial flow fan |
| CN111794809A (en) * | 2020-08-10 | 2020-10-20 | 长兴永能动力科技有限公司 | Adjustable turbine blade for centripetal turbine |
| CN112112828A (en) * | 2020-09-09 | 2020-12-22 | 贵州电网有限责任公司 | Ventilation device for distribution room of transformer substation |
| CN114688620A (en) * | 2020-12-30 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan assembly and air conditioner |
| CN114704493A (en) * | 2022-04-25 | 2022-07-05 | 远东双诚风机(江苏)有限公司 | Energy-saving fan with adjustable blade |
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Cited By (7)
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| CN109236715A (en) * | 2018-11-14 | 2019-01-18 | 成都工业学院 | A kind of axial-flow fan blade regulating mechanism and blower |
| CN111472992A (en) * | 2020-04-15 | 2020-07-31 | 华中科技大学 | Device and method for adjusting rotating rope type movable blades of axial flow fan |
| CN111794809A (en) * | 2020-08-10 | 2020-10-20 | 长兴永能动力科技有限公司 | Adjustable turbine blade for centripetal turbine |
| CN112112828A (en) * | 2020-09-09 | 2020-12-22 | 贵州电网有限责任公司 | Ventilation device for distribution room of transformer substation |
| CN112112828B (en) * | 2020-09-09 | 2021-12-03 | 贵州电网有限责任公司 | Ventilation device for distribution room of transformer substation |
| CN114688620A (en) * | 2020-12-30 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan assembly and air conditioner |
| CN114704493A (en) * | 2022-04-25 | 2022-07-05 | 远东双诚风机(江苏)有限公司 | Energy-saving fan with adjustable blade |
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Application publication date: 20190118 |
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