CN114392621B - Self-cleaning cooling device of direct-cooling wind driven generator - Google Patents
Self-cleaning cooling device of direct-cooling wind driven generator Download PDFInfo
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- CN114392621B CN114392621B CN202111632572.8A CN202111632572A CN114392621B CN 114392621 B CN114392621 B CN 114392621B CN 202111632572 A CN202111632572 A CN 202111632572A CN 114392621 B CN114392621 B CN 114392621B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention belongs to the technical field of cooling devices of wind driven generators, and relates to a self-cleaning cooling device of a direct-cooling wind driven generator, which comprises a cooler box body, an air inlet, an air outlet and a differential pressure sensor, wherein the air inlet, the air outlet and the differential pressure sensor are arranged on the cooler box body; the differential pressure sensor is connected with the control device, and the control device is connected with the driving device; the air inlet is provided with a filter screen, and the filter screen can be matched with the self-cleaning device to carry out self-cleaning under the action of the driving device. The pressure difference value information detected by the pressure difference sensor is fed back to the control device through the pressure difference sensor, when the pressure difference value information received by the control device reaches a set threshold value, the control device starts the driving device to start working, the driving device drives the first roller and the second roller to start rotating to drive the used filter screen to be wound at one end, and the air inlet is automatically replaced by a clean filter screen; meanwhile, when used filter screens are collected, the filter screens are cleaned through the self-cleaning device, and therefore the filter screens can be recycled in the first roller and the second roller.
Description
Technical Field
The invention belongs to the technical field of cooling devices of wind driven generators, relates to a self-cleaning cooling device, and particularly relates to a self-cleaning cooling device of a direct-cooling wind driven generator.
Background
As is known in the art, the cooling structure of the wind turbine mainly includes an air-to-air cooler, an air-to-water cooler, a water jacket cooler, and the like. In recent years, facing the market pressure of "wind and fire equivalent", the direct cooling type wind driven generator gradually receives the attention of the market and occupies more and more market share.
A wind power generator with a novel cooling method disclosed in the prior art discloses a cooling device, which is shown in fig. 1-2, and the externally-mounted cooling device consists of a cooler box body, an air inlet, an air outlet and an air filtering device; a cooling air channel is arranged in the box body, an inlet of the cooling air channel is an air inlet, an air filtering device is arranged at the position of the air inlet, and an air outlet is arranged at the other side of an outlet of the cooling air channel. This cooling device, because air quality problem, thereby the outside air must can get into the generator inside after filter equipment is clean and cool off the generator. Therefore, the filter screen needs to be replaced regularly, and particularly under the condition of severe environment, the replacement period is greatly shortened; moreover, in order to ensure the safety of personnel and units during replacement, shutdown operation is required, which not only affects the power generation efficiency, but also causes waste of manpower and material resources and increases the maintenance cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a self-cleaning cooling device of a direct-cooling wind driven generator.
In order to realize the purpose, the invention provides the following technical scheme:
the self-cleaning cooling device of the direct-cooling wind driven generator comprises a cooler box body, an air inlet, an air outlet and a differential pressure sensor, wherein the air inlet, the air outlet and the differential pressure sensor are arranged on the cooler box body; the differential pressure sensor is connected with a control device, and the control device is connected with a driving device; the air inlet is provided with a filter screen, and the filter screen can be matched with the self-cleaning device to carry out self-cleaning under the action of the driving device.
Furthermore, the air inlet is positioned on the side surface and/or one end surface of the cooler box body, and the air outlet is positioned on the other end surface of the cooler box body.
Further, the driving device comprises a first driving motor for driving the first roller wheel to rotate and a second driving motor for driving the second roller wheel to rotate; the first roller and the second roller are arranged at two ends of the filter screen, the length of the filter screen is more than twice of the distance between the first roller and the second roller, one end of the filter screen is fixedly wound on the first roller, and the other end of the filter screen is fixedly wound on the second roller; a metal frame used for fixing the filter screen is arranged between the first roller and the second roller.
Furthermore, the metal frame comprises a front metal frame distributed in front of the filter screen and a rear metal frame distributed behind the filter screen, and the filter screen is clamped between the front metal frame and the rear metal frame to prevent wind from deforming or tearing; preceding metal frame is provided with the recess of the filter screen horizontal migration of being convenient for along its length direction symmetry, back metal frame is the same with preceding metal frame's structure.
Further, self-cleaning device includes the first cleaning brush that is located first running roller the place ahead, is located the second cleaning brush in second running roller the place ahead, the bottom of first cleaning brush is provided with first collection box, the bottom of second cleaning brush is provided with the second and collects the box.
Furthermore, the self-cleaning device also comprises a first air pipe positioned at the top of the first cleaning brush and a second air pipe positioned at the top of the second cleaning brush, and the first air pipe and the second air pipe are respectively communicated with an air guide cylinder in the cooler box body through pipelines.
Furthermore, a first installation cavity and a second installation cavity are respectively arranged at two ends of the filter screen;
a first roller and a first cleaning brush are distributed in the first mounting cavity, one end of the first roller is connected with an output rotating shaft of a first driving motor through a speed reducer, and the other end of the first roller is connected with a bearing embedded in the lower end face of the first mounting cavity; the first cleaning brush is detachably arranged in the first mounting cavity;
a second roller and a second cleaning brush are distributed in the second mounting cavity, one end of the second roller is connected with an output rotating shaft of a second driving motor through a speed reducer, and the other end of the second roller is connected with a bearing embedded in the lower end face of the second mounting cavity; the second cleaning brush is detachably arranged in the second installation cavity.
Furthermore, the top surfaces of the first installation cavity and the second installation cavity are detachably provided with cover plates.
Furthermore, one end of the differential pressure sensor is used for collecting pressure information of outside air, and the other end of the differential pressure sensor is used for collecting the air pressure information filtered by the filter screen.
Further, the filter screen is composed of cut sheet-shaped filter cotton.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: according to the device, through the design that a filter screen, a self-cleaning device and a driving device are arranged on a cooler box body, the pressure difference value information detected by a pressure difference sensor is fed back to a control device, when the pressure difference value information received by the control device reaches a set threshold value, the control device starts the driving device to work, the driving device drives a first roller and a second roller to start rotating to drive the used filter screen to be wound at one end, and an air inlet is automatically replaced by the clean filter screen; meanwhile, when used filter screens are collected, the filter screens are cleaned through the self-cleaning device, and therefore the filter screens can be recycled in the first roller and the second roller.
On the other hand, the self-cleaning device adopts the design of combining the cleaning brush with the collecting box, and when the driving device drives the roller to rotate, the cleaning brush finishes and cleans the filter screen before the filter screen is collected on the roller; meanwhile, clean air can be introduced from the air guide cylinder through the air pipe, and when the filter screen is replaced, air is blown while being wound, so that pollutants are collected in a collecting box below, and the filter screen is cleaned; in addition, the cleaning brush is detachably arranged in the installation cavity, the cover plate of the installation cavity can be opened periodically according to needs, and the cleaning brush is detached to be cleaned or replaced.
According to the analysis, the device is compared with the filter screen in the traditional cooling device, the automatic replacement and cleaning of the filter screen in the direct cooling wind power motor cooling device can be realized, the ventilation cooling effect of the motor is ensured, the service life of the filter screen is greatly prolonged, the waste of manpower and materials caused by the fact that the filter screen needs to be replaced regularly in the existing cooling device is avoided, the maintenance cost is reduced, meanwhile, the regular shutdown maintenance is not needed, and the power generation efficiency is also improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a structural diagram of a cooling device of a conventional direct cooling wind driven generator;
FIG. 2 is a diagram of a prior art filter screen;
FIG. 3 is a structural diagram of a self-cleaning cooling device of a direct-cooling wind driven generator according to the present invention;
FIG. 4 is a schematic view of a filter and a self-cleaning device according to the present invention;
fig. 5 is a control schematic diagram provided by the present invention.
Wherein: 1. a cooler box; 2. an air inlet; 3. an air outlet; 4. a differential pressure sensor; 5. a control device; 6. an air duct; 7. filtering with a screen; 8. a first roller; 9. a first drive motor; 10. a second roller; 11. a second drive motor; 12. a metal frame; 13. a first cleaning brush; 14. a second cleaning brush; 15. a first collection box; 16. a second collection box; 17. a first air duct; 18. a second air duct; 19. a pipeline; 20. and (5) buckling.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 3 to 5, the embodiment provides a self-cleaning cooling device for a direct-cooling wind power generator, which includes a cooler box 1, an air inlet 2, an air outlet 3 and a differential pressure sensor 4, which are arranged on the cooler box 1; the differential pressure sensor 4 is connected with a control device 5, and the control device 5 is connected with a driving device; air intake 2 department installs filter screen 7, filter screen 7 can cooperate self-cleaning device to carry out the automatically cleaning under drive arrangement's effect.
Further, the air inlet 2 is located on a side surface and/or an end surface of the cooler case 1, and the air outlet 3 is located on the other end surface of the cooler case 1.
Further, the driving device comprises a first driving motor 9 for driving the first roller 8 to rotate and a second driving motor 11 for driving the second roller 10 to rotate; the first roller 8 and the second roller 10 are installed at two ends of the filter screen 7, the length of the filter screen 7 is more than twice of the distance between the first roller 8 and the second roller 10, one end of the filter screen 7 is fixedly wound on the first roller 8, and the other end and the filter screen 7 with excessive length are fixedly wound on the second roller 10; a metal frame 12 used for fixing the filter screen 7 is arranged between the first roller 8 and the second roller 10.
Further, the metal frame 12 comprises a front metal frame distributed in front of the filter screen 7 and a rear metal frame distributed behind the filter screen 7, and the filter screen is clamped between the front metal frame and the rear metal frame to prevent wind from deforming or tearing; preceding metal frame is provided with the recess (being equivalent to the guide rail) of the horizontal migration of filter screen 7 of being convenient for along its length direction symmetry, back metal frame is the same with preceding metal frame's structure (all adopt the latticed structural design of square) to fix in air intake department through buckle 20.
Further, the self-cleaning device comprises a first cleaning brush 13 located in front of the first roller 8 and a second cleaning brush 14 located in front of the second roller 10, wherein a first collecting box 15 is arranged at the bottom end of the first cleaning brush 13, and a second collecting box 16 is arranged at the bottom end of the second cleaning brush 14.
Further, the self-cleaning device further comprises a first air duct 17 positioned at the top of the first cleaning brush 13 and a second air duct 18 positioned at the top of the second cleaning brush 14, and the first air duct 17 and the second air duct 18 are respectively communicated with the air duct 6 in the cooler box body 1 through a pipeline 19.
Furthermore, a first installation cavity and a second installation cavity are respectively arranged at two ends of the filter screen 7;
a first roller 8 and a first cleaning brush 13 are distributed in the first mounting cavity, one end of the first roller 8 is connected with an output rotating shaft of a first driving motor 9 through a bevel gear reducer, and the other end of the first roller is connected with a bearing embedded in the lower end face of the first mounting cavity; the first cleaning brush 13 is detachably mounted (e.g., bolted) in the first mounting cavity;
a second roller wheel 10 and a second cleaning brush 14 are distributed in the second mounting cavity, one end of the second roller wheel 10 is connected with an output rotating shaft of a second driving motor 11 through a bevel gear reducer, and the other end of the second roller wheel is connected with a bearing embedded in the lower end face of the second mounting cavity; the second cleaning brush 14 is removably mounted (e.g., bolted) within the second mounting cavity.
Furthermore, the top surfaces of the first installation cavity and the second installation cavity are detachably provided with cover plates.
Further, one end of the differential pressure sensor 4 is used for collecting pressure information of outside air, and the other end of the differential pressure sensor is used for collecting air pressure information filtered by the filter screen 7.
Example 2
The embodiment provides a self-cleaning type cooling device of a direct-cooling wind driven generator, which comprises a cooler box body 1, an air inlet 2, an air outlet 3, a differential pressure sensor 4, a filter screen 7, a filter screen self-cleaning device, a control device 5 and a driving device. Specifically, the air inlets 2 are arranged on any side surface of the cooler box body 1, the number of the air inlets 2 can be set according to the required air quantity, and the air outlets 3 are arranged on the end surface of the cooler box body 1 and are provided with air ducts 6.
Further, the air inlet 2 is provided with a filter screen 7 and a self-cleaning device, and the filter screen 7 can reciprocate along the metal frame 12 made of aluminum alloy or other metal materials under the action of the driving device.
Further, filter screen 7 main part comprises the slice filter pulp of tailorring, its length is greater than the interval between the twice first running roller 8 and the second running roller 10, the fixed winding of one end of filter screen 7 is on first running roller 8, the fixed winding of filter screen 7 of the other end and unnecessary length is on second running roller 10, in length direction, filter screen 7 is by the spacing fixed of aluminum alloy metal frame, and the bolt assembly is in 2 positions of air intake for the aluminum alloy metal frame, or the lug weld is in 2 positions of air intake.
Further, the self-cleaning device comprises an air pipe and a cleaning brush, and comprises a first cleaning brush 13 positioned in front of the first roller 8 and a second cleaning brush 14 positioned in front of the second roller 10, wherein a first collecting box 15 is arranged at the bottom end of the first cleaning brush 13, and a second collecting box 16 is arranged at the bottom end of the second cleaning brush 14; meanwhile, a first air duct 17 is arranged at the top of the first cleaning brush 13, a second air duct 18 is arranged at the top of the second cleaning brush 14, and the first air duct 17 and the second air duct 18 are respectively communicated with the air duct 6 at the air outlet 3 through a pipeline 19. Here, the air duct 6 is a positive pressure air duct, and an air port of the positive pressure air duct blows air outwards.
Further, the distance between the first cleaning brush 13 and the first roller 8 is more than 1/2 of the thickness of the filter screen wound on the first roller 8, so as to ensure that the filter screen 7 can reciprocate under the action of the driving device; likewise, the second cleaning brush 14 is spaced from the second roller 10 by a distance greater than 1/2 of the screen length and the thickness of the screen wound on the second roller 10.
Further, the first collecting box 15 is detachably installed at the bottom end of the first cleaning brush 13, and the second collecting box 16 is detachably installed at the bottom end of the second cleaning brush 14, so that the collected pollutants can be cleaned conveniently.
The device has the following specific working process:
Preferably, the self-cleaning device can adopt the combined design of the cleaning brush and the air pipe at the same time, the filter screen 7 is cleaned and arranged before the filter screen 7 is collected on the roller wheel, and meanwhile, the air is blown while being wound, so that pollutants (dust, cotton wool and the like) are collected in the collection box below, and the filter screen 7 is efficiently cleaned.
When the pressure difference numerical information that pressure difference sensor 4 gathered next time reached the settlement threshold value (promptly filter screen 7 blocks up once more), controlling means 5 started drive arrangement, and filter screen 7 twines, collects to second running roller 10 direction, drives clean filter screen 7 on the first running roller 8 simultaneously and arranges in air intake 2 department, arranges in order, cleans the filter screen 7 that has blockked up through cleaning brush or tuber pipe simultaneously. So, filter screen 7 realizes automatic cycle between two rollers and uses, clean, collect, greatly reduced the maintenance cost, the staff only need regularly clear up the filth in the collection box according to experience, has avoided the waste of filter screen 7 material.
In summary, compared with the cooling device shown in fig. 1-2, the self-cleaning cooling device for the direct-cooling wind driven generator provided by the invention has the advantages that the filter screen 7 needs to be replaced every three months in the conventional cooling device, the unit needs to be stopped during replacement, the maintenance time needs 50min each time, the labor cost is wasted, and the working efficiency of the generator is reduced. After the cooling device provided by the invention is adopted, the filter screen 7 can be automatically replaced according to the detected pressure difference data information through the automatic replacing and winding device, so that the daily maintenance is avoided, the power generation efficiency is improved, the manual waste is reduced, and the maintenance cost is reduced. Meanwhile, through the design of the automatic cleaning device, the filter screen 7 can be automatically cleaned and cleaned after being replaced, the filter screen can be recycled, and the waste of the filter screen 7 is reduced.
The above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (4)
1. A self-cleaning cooling device of a direct-cooling wind driven generator is characterized by comprising a cooler box body (1), an air inlet (2), an air outlet (3) and a differential pressure sensor (4), wherein the air inlet (2), the air outlet (3) and the differential pressure sensor are arranged on the cooler box body (1); the differential pressure sensor (4) is connected with a control device (5), and the control device (5) is connected with a driving device; a filter screen (7) is installed at the air inlet (2), and the filter screen (7) can be matched with a self-cleaning device to carry out self-cleaning under the action of a driving device;
the air inlet (2) is positioned on the side surface and/or one end surface of the cooler box body (1), and the air outlet (3) is positioned on the other end surface of the cooler box body (1);
the driving device comprises a first driving motor (9) for driving the first roller (8) to rotate and a second driving motor (11) for driving the second roller (10) to rotate; the first roller (8) and the second roller (10) are arranged at two ends of the filter screen (7), the length of the filter screen (7) is more than twice of the distance between the first roller (8) and the second roller (10), one end of the filter screen (7) is fixedly wound on the first roller (8), and the other end of the filter screen is fixedly wound on the second roller (10); a metal frame (12) used for fixing the filter screen (7) is arranged between the first roller (8) and the second roller (10); the metal frame (12) comprises a front metal frame distributed in front of the filter screen (7) and a rear metal frame distributed behind the filter screen (7), the front metal frame is symmetrically provided with grooves convenient for the filter screen (7) to horizontally move along the length direction of the front metal frame, and the rear metal frame and the front metal frame are identical in structure;
the self-cleaning device comprises a first cleaning brush (13) positioned in front of the first roller (8) and a second cleaning brush (14) positioned in front of the second roller (10), wherein a first collecting box (15) is arranged at the bottom end of the first cleaning brush (13), and a second collecting box (16) is arranged at the bottom end of the second cleaning brush (14);
the self-cleaning device also comprises a first air pipe (17) positioned at the top of the first cleaning brush (13) and a second air pipe (18) positioned at the top of the second cleaning brush (14), wherein the first air pipe (17) and the second air pipe (18) are respectively communicated with an air guide cylinder (6) in the cooler box body (1) through a pipeline (19);
a first mounting cavity and a second mounting cavity are respectively arranged at two ends of the filter screen (7); a first roller (8) and a first cleaning brush (13) are distributed in the first mounting cavity, one end of the first roller (8) is connected with an output rotating shaft of a first driving motor (9) through a speed reducer, and the other end of the first roller is connected with a bearing embedded in the lower end face of the first mounting cavity; the first cleaning brush (13) is detachably arranged in the first mounting cavity;
a second roller (10) and a second cleaning brush (14) are distributed in the second mounting cavity, one end of the second roller (10) is connected with an output rotating shaft of a second driving motor (11) through a speed reducer, and the other end of the second roller is connected with a bearing embedded in the lower end face of the second mounting cavity; the second cleaning brush (14) is detachably arranged in the second mounting cavity.
2. The self-cleaning cooling device for the direct cooling wind driven generator as claimed in claim 1, wherein the top surfaces of the first and second installation cavities are detachably provided with cover plates.
3. The self-cleaning cooling device for the direct-cooling wind driven generator as claimed in claim 1, wherein one end of the differential pressure sensor (4) is used for collecting the pressure information of the outside air, and the other end is used for collecting the air pressure information filtered by the filter screen (7).
4. Self-cleaning cooling device of a direct cooling wind generator according to claim 1, characterized in that the screen (7) is composed of cut sheet-like filter cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111632572.8A CN114392621B (en) | 2021-12-29 | 2021-12-29 | Self-cleaning cooling device of direct-cooling wind driven generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111632572.8A CN114392621B (en) | 2021-12-29 | 2021-12-29 | Self-cleaning cooling device of direct-cooling wind driven generator |
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| CN114392621A CN114392621A (en) | 2022-04-26 |
| CN114392621B true CN114392621B (en) | 2023-02-10 |
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| CN116950758A (en) * | 2023-09-21 | 2023-10-27 | 潍坊华利动力设备有限公司 | Generator set heat abstractor |
| CN118105832A (en) * | 2024-04-17 | 2024-05-31 | 江苏碧瑶环境工程有限公司 | Efficient sectional type cyclone countercurrent chemical washing tower and application method thereof |
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| KR100666529B1 (en) * | 2004-09-20 | 2007-01-12 | (주)나노바이오티스 | Air cleaner having alarm function of dust filter replace time |
| CN109642553B (en) * | 2016-09-30 | 2021-02-05 | 弗兰德有限公司 | Apparatus and method for cooling generator installed in nacelle of wind turbine |
| CN212523395U (en) * | 2020-05-15 | 2021-02-12 | 唐山市规划建筑设计研究院 | A filter assembly for heating and ventilating air conditioner |
| CN212429349U (en) * | 2020-06-12 | 2021-01-29 | 亿昇(天津)科技有限公司 | Air inlet filtering device of integrated magnetic suspension high-speed air blower |
| CN111828211A (en) * | 2020-07-09 | 2020-10-27 | 东风特汽(十堰)客车有限公司 | Self-cleaning air filter device |
| CN111852794B (en) * | 2020-07-30 | 2021-11-12 | 浙江运达风电股份有限公司 | Automatic winding type heat dissipation device of direct-cooling wind driven generator |
| CN214634852U (en) * | 2021-04-27 | 2021-11-09 | 科瑞特空调集团有限公司 | Filter screen system with back flushing cleaning function |
| CN214715160U (en) * | 2021-04-27 | 2021-11-16 | 科瑞特空调集团有限公司 | Filter screen system with mechanical cleaning function |
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