CN110165671B - Self-adjusting active power filter - Google Patents
Self-adjusting active power filter Download PDFInfo
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- CN110165671B CN110165671B CN201910398722.XA CN201910398722A CN110165671B CN 110165671 B CN110165671 B CN 110165671B CN 201910398722 A CN201910398722 A CN 201910398722A CN 110165671 B CN110165671 B CN 110165671B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Drying Of Gases (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a self-adjusting active power filter, wherein an upper shell is of a round tube structure, a bin door is arranged on the upper shell, a lower shell is of a round tube structure, and the lower end of the lower shell is fixedly connected with a support.
Description
Technical Field
The invention relates to an active power filter, in particular to a self-adjusting active power filter.
Background
The active power filter is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, can quickly track and compensate harmonic waves with different sizes and frequencies, is called as an active power filter, and is only capable of passively absorbing harmonic waves with fixed frequency and fixed frequency compared with a passive LC filter.
When the active power filter is used, because a large amount of heat is generated by a power element, a resistor and a reactance, an effective heat dissipation means needs to be provided for the active power filter in order to ensure the stable performance of components, but the existing method adopts passive heat dissipation or air cooling heat dissipation, and because the internal structure of the active power filter is complex, an air channel is influenced, and the heat dissipation effect is not ideal; use under the external environment of difference simultaneously, the temperature and the humidity of external environment also have very big influence to the effect of heat dissipation and dehumidification, and the strategy of heat dissipation dehumidification can't be pertinently set up to current scheme.
Disclosure of Invention
In order to solve the above technical problem, an object of the present invention is to provide a self-adjusting active power filter.
The technical problem to be solved by the invention is as follows:
(1) How to perform dehumidification and heat dissipation of the equipment according to the external environment.
(2) How to provide dustproof function when guaranteeing dehumidification and heat dissipation have certain effect.
The purpose of the invention can be realized by the following technical scheme:
a self-adjusting active power filter comprises a lower shell and an upper shell, wherein the upper shell is of a round tube type structure, a bin door is arranged on the upper shell, the lower shell is of a round tube type structure, a support is fixedly connected to the lower end of the lower shell, a control bin and a group of sensors are fixedly connected to the outer side wall of the lower shell, the control bin is communicated with an inner cavity of the lower shell, two driving motors are arranged inside the control bin, gears are fixedly sleeved on rotating shafts of the driving motors, a lower end opening of the lower shell is fixedly connected with a lower cover plate through bolts, an air inlet hole is formed in the lower cover plate, and one end of a fixed shaft is vertically and fixedly connected to the center of the upper end face of the lower cover plate;
a function switching column and a ventilation adjusting plate are arranged in an inner cavity of the lower shell, the ventilation adjusting plate is positioned above the function switching column, a first inserting hole is formed in the center of the function switching column, a bearing is coaxially and fixedly connected to the inner wall of the first inserting hole, the bearing is fixedly sleeved on a fixed shaft, three function air holes which are annularly distributed by taking the fixed shaft as a circle center are formed in the function switching column, the function air holes are respectively a dehumidification air hole, a dust removal air hole and a heat dissipation air hole, a first toothed ring is fixedly sleeved on the side wall of the function switching column, and the first toothed ring is meshed with a gear on one of the driving motors;
the ventilation adjusting plate is a circular plate, a second inserting hole is formed in the center of the ventilation adjusting plate, the inner wall of the second inserting hole is coaxially and fixedly connected with another bearing, the bearing is fixedly sleeved on the fixed shaft, a second gear ring is fixedly sleeved on the outer side wall of the ventilation adjusting plate, the second gear ring is meshed with a gear on another driving motor, a single-bin air adjusting hole and three-bin air adjusting holes are formed in the ventilation adjusting plate, the opening end, close to the function switching column, of each three-bin air adjusting hole and the opening end, close to the function switching column, of each single-bin air adjusting hole are located on the same diameter, the opening ends, far away from the function switching column, of the three-bin air adjusting holes are three, and the three opening ends are annularly distributed by taking the second inserting hole as the circle center;
the coaxial fixedly connected with lower solid fixed splint of the upper end open-ended inside wall of lower part shell, cylindrical recess has been seted up to the up end of lower solid fixed splint, and the air guide hole that three annular distributes is seted up to the inner diapire of cylindrical recess, annular sliding tray has been seted up to the lateral wall of lower solid fixed splint, and the lower extreme center department of lower solid fixed splint and the upper end fixed connection of fixed axle, the lower extreme of the inner diapire fixedly connected with baffle of cylindrical recess, the baffle passes through screw fixedly connected with electronic component and three group's sensors in addition, gu fixed splint on the upper end fixedly connected with of baffle, gu fixed splint is the same with lower solid fixed splint structure, and is the mirror image setting, gu fixed splint and last solid fixed splint all pass through annular sliding tray and the annular sliding strip sliding connection that both ends set up about the upper and lower portion shell inside wall down.
Further, the baffle comprises the mutual fixed connection of edge of three insulating plane board, and the contained angle between the three plane board is 120, lower solid fixed splint, baffle, last solid fixed splint and upper portion shell constitute an installation storehouse that has three looks isostructure, every all be provided with a set of sensor in the installation storehouse, it is a set of the sensor includes temperature sensor and humidity transducer, and electronic component includes power component, reactance and resistive element and main control element, and power component, reactance and resistive element set up respectively in three installation storehouse with main control element.
Furthermore, an exhaust fan and a metal dust screen are fixedly arranged in the air guide hole in the upper fixing clamp plate, and the metal dust screen is fixedly arranged in the air inlet hole.
Further, be provided with the dry box of detachable cylinder type in the dehumidification gas pocket, the drier is equipped with in the dry box, be provided with the cylindrical dust removal box of detachable in the dust removal gas pocket, be provided with the filter screen of being no less than the different mesh numbers of three-layer in the dust removal box, the small-size refrigerating plant of inner wall fixedly connected with in heat dissipation gas pocket.
Furthermore, small-size refrigerating plant, sensor, driving motor, updraft ventilator, power component, reactance and resistance element all are connected with main control element electricity to all supply power through external power source.
The invention has the beneficial effects that:
(1) According to the invention, the temperature and the humidity inside and outside the filter are obtained through the sensor, when the external environment temperature is lower, the heat dissipation can be carried out by automatically starting the exhaust fan, the power consumption is reduced, meanwhile, the sucked air is filtered before entering the installation bin, the cleanness in the installation bin is ensured, the dust deposition of electronic elements is prevented, under the condition of small temperature difference, the refrigeration function can be automatically started, the sucked air is cooled before entering the installation bin, the cold air is used for rapidly cooling the electronic elements in the installation bin, and finally the high-temperature gas is discharged from the air guide hole.
(2) Under the condition that detects the external environment humidity, switching to dehumidification function that can be automatic to start the fan, when guaranteeing the circulation of air, make inspiratory air through the dehumidification before getting into the installation storehouse, prevent that humid air from getting into the installation storehouse, cause the harm to electronic component, when not dehumidifying, switch to dustproof function, dehumidify through the dry air of circulation, can prolong the life of drying box.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
fig. 3 is a reverse perspective view of the air adjustment plate of the present invention.
In the figure: the device comprises a lower shell 1, a support 2, a control cabin 3, a lower cover plate 4, an air inlet 5, a fixed shaft 6, a function switching column 7, a first gear ring 8, a function air hole 9, a first inserting hole 10, a ventilation adjusting plate 11, a second gear ring 12, a second inserting hole 13, a single-cabin air adjusting hole 14, a three-cabin air adjusting hole 15, a lower fixed clamp plate 16, an air guide hole 17, an annular sliding groove 18, a partition plate 19, an electronic element 20, an upper fixed clamp plate 21, an upper shell 22, a cabin door 23 and an annular sliding strip 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-3, this embodiment provides a self-adjusting active power filter, which includes a lower housing 1 and an upper housing 22, the upper housing 22 is a circular tube structure, and a door 23 is opened on the upper housing 22, the lower housing 1 is a circular tube structure, and a lower end of the lower housing 1 is fixedly connected with a support 2, for making the bottom have a certain space with the ground, which is convenient for sucking air, a control cabin 3 and a set of sensors are fixedly connected with the outer side wall of the lower housing 1, the control cabin 3 is connected with the inner cavity of the lower housing 1 through, and two driving motors are arranged inside the control cabin 3, which is a stepping motor capable of rotating at a specific angle, a gear is fixedly sleeved on a rotating shaft of the driving motor, a lower end opening of the lower housing 1 is fixedly connected with a lower cover plate 4 through a bolt, which is detachable, and is convenient for maintenance and replacement of each functional air hole 9. An air inlet 5 is arranged on the lower cover plate 4, the gap between the lower cover plate and the function switching column 7 is not more than 1mm, air is sucked from the lower cover plate, and one end of a fixed shaft 6 is vertically and fixedly connected with the center of the upper end surface of the lower cover plate 4;
a function switching column 7 and a ventilation adjusting plate 11 are arranged in an inner cavity of the lower shell 1, the gap is not more than 1mm, the ventilation adjusting plate 11 is positioned above the function switching column 7, a first inserting hole 10 is formed in the center of the function switching column 7, a bearing is coaxially and fixedly connected to the inner wall of the first inserting hole 10, the bearing is fixedly sleeved on a fixed shaft 6, the function switching column 7 can rotate by taking the fixed shaft 6 as a circle center, three function air holes 9 which are annularly distributed by taking the fixed shaft 6 as a circle center are formed in the function switching column 7, the function air holes 9 are communicated with an air inlet 5, the function air holes 9 are respectively a dehumidification air hole, a dust removal air hole and a heat dissipation air hole, a first toothed ring 8 is fixedly sleeved on the side wall of the function switching column 7, and the first toothed ring 8 is meshed with a gear on one of the driving motors; the driving motor can make the gear rotate, and then drive the function switching post 7 to rotate.
The ventilation adjusting plate 11 is a circular plate, a second inserting hole 13 is formed in the center of the ventilation adjusting plate 11, the inner wall of the second inserting hole 13 is coaxially and fixedly connected with another bearing, the bearing is fixedly sleeved on the fixed shaft 6, so that the ventilation adjusting plate 11 can rotate by taking the fixed shaft 6 as a circle center, a second gear ring 12 is fixedly sleeved on the outer side wall of the ventilation adjusting plate 11, the second gear ring 12 is meshed with a gear on another driving motor, so that the driving motor can drive the ventilation adjusting plate 11 to rotate, a single-bin air adjusting hole 14 and three-bin air adjusting holes 15 are formed in the ventilation adjusting plate 11 and used for switching between single-bin ventilation and three-bin ventilation, the opening end, close to the function switching column 7, of each three-bin air adjusting hole 15 and the opening end, close to the function switching column 7, of each single-bin air adjusting hole 14 and the opening end, far away from the function switching column 7, are three, and are annularly distributed by taking the second inserting hole 13 as a circle center; the three-bin air regulating holes 15 form a structure similar to a four-way pipe, and the single-bin air regulating holes 14 or the three-bin air regulating holes 15 are communicated with the functional air holes 9.
Lower solid fixed splint 16 of the coaxial fixedly connected with in upper end open-ended inside wall of lower part shell 1, cylindrical recess has been seted up to lower solid fixed splint 16's up end, and the air guide hole 17 that three annular distributes is seted up to cylindrical recess's interior diapire, be used for ventilating for the installation storehouse, annular sliding tray 18 has been seted up to lower solid fixed splint 16's lateral wall, and the lower extreme center department of lower solid fixed splint 16 and the upper end fixed connection of fixed axle 6 down, the lower extreme of cylindrical recess's interior diapire fixedly connected with baffle 19, baffle 19 passes through screw fixedly connected with electronic component 20 and three other group's sensors, the upper end fixedly connected with of baffle 19 goes up solid fixed splint 21, it is the same with lower solid fixed splint 16 structure to go up gu fixed splint 21, and be the mirror image setting, lower solid fixed splint 16 and last solid fixed splint 21 are all through annular sliding tray 18 and the annular sliding strip 24 sliding connection that both ends set up and down on the upper portion shell 22 inside wall. The magazine door 23 can be switched to the side wall of each mounting magazine by rotating the upper housing 22 for maintenance while the lower fixing clamp 16 and the upper fixing clamp 21 are kept stationary.
All fixedly in the air guide hole 17 on last fixed splint 21 be equipped with induced draft fan and metal dust screen, fixedly in the inlet port 5 being provided with the metal dust screen, provide elementary dustproof.
Be provided with the dry box of detachable cylinder type in the dehumidification gas pocket, be equipped with the drier in the dry box, be provided with the cylindrical dust removal box of detachable in the dust removal gas pocket, be provided with the filter screen of the different mesh numbers of no less than the three-layer in the dust removal box, the small-size refrigerating plant of inner wall fixedly connected with in heat dissipation gas pocket.
The small refrigerating device, the sensor, the driving motor, the exhaust fan, the power element, the reactor and the resistance element are all electrically connected with the main control element and are all powered by an external power supply.
The specific working process of this embodiment is as follows:
1) The humidity and the temperature of the external environment are detected by a sensor arranged on the lower shell 1, and the humidity and the temperature in each installation bin are detected by a sensor in each installation bin; the data of the internal and external sensors control the driving motor and the small refrigerating device by the main control element, and automatic dust removal, dehumidification and cooling are carried out. Air enters from the air inlet 5, sequentially passes through the functional air holes 9, the openings on the ventilation adjusting plate 11 and the air guide holes 17 at the upper end and the lower end of the mounting bin, and performs required dehumidification or heat dissipation on the electronic elements 20 in the mounting bin.
2) The method for controlling heat dissipation by the main control element comprises the following steps: if the temperature detected by the temperature sensor in the installation bin does not reach the heat dissipation threshold value, controlling the driving motor to rotate, adjusting the dust removal air hole to be communicated with the air inlet hole 5, and simultaneously controlling to start the air draft fan; if the temperature detected by the temperature sensor in the installation bin reaches a heat dissipation threshold value, the driving motor is controlled to rotate, the heat dissipation air hole is adjusted to be communicated with the air inlet hole 5, the air draft fan is controlled to be started, data of an external temperature sensor are acquired, if the external temperature is low and the difference between the internal temperature and the external temperature is greater than 20 ℃, the small refrigerating device is not started, if the difference between the internal temperature and the external temperature is less than 20 ℃, the small refrigerating device is started, meanwhile, the number of the installation bins needing heat dissipation is detected and prompted, if the number is 1, the single-bin air adjusting hole 14 is communicated with the air inlet hole 5 through the driving motor, and if the temperature of the installation length is high, the corresponding air draft fan is started, the temperature is not high, the air draft fan is not needed to be started, energy is saved, and if the number exceeds 1, the three-bin air adjusting holes 15 are communicated with the air inlet hole 5;
3) The method of main control element control dehumidification is as follows, after the humidity that detects in the installation storehouse reaches the threshold value of dehumidification if the internal sensor, transfer three storehouses accent gas hole 15 and inlet port 5 to the intercommunication, acquire the data of external sensor simultaneously, if outside environment humidity is big, then adjust the dehumidification gas pocket to communicate with inlet port 5, and start updraft fan, if outside environment humidity is little, then adjust the dust removal gas pocket to communicate with inlet port 5, and start updraft fan, for dehumidifying in the installation storehouse.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (4)
1. The utility model provides a self-interacting active power filter, includes lower part shell (1) and upper portion shell (22), its characterized in that, upper portion shell (22) is the pipe type structure, and has seted up bin gate (23) on upper portion shell (22), lower part shell (1) is the pipe type structure, and the lower extreme fixedly connected with support (2) of lower part shell (1), the lateral wall fixedly connected with control storehouse (3) and a set of sensor of lower part shell (1), control storehouse (3) and the inner chamber through connection of lower part shell (1), and the inside of control storehouse (3) is equipped with two driving motor, and driving motor's pivot is fixed to cover and is equipped with the gear, the lower extreme opening of lower part shell (1) passes through bolt fixedly connected with lower cover plate (4), set up on lower cover plate (4) inlet port (5), the one end of the perpendicular fixedly connected with fixed axle (6) of center department of the up end face of lower cover plate (4);
a function switching column (7) and an air-permeable adjusting plate (11) are arranged in an inner cavity of the lower shell (1), the air-permeable adjusting plate (11) is positioned above the function switching column (7), a first inserting hole (10) is formed in the center of the function switching column (7), a bearing is coaxially and fixedly connected to the inner wall of the first inserting hole (10), the bearing is fixedly sleeved on the fixed shaft (6), three function air holes (9) which are annularly distributed by taking the fixed shaft (6) as the circle center are formed in the function switching column (7), the function air holes (9) are respectively a dehumidification air hole, a dust removal air hole and a heat dissipation air hole, a first toothed ring (8) is fixedly sleeved on the side wall of the function switching column (7), and the first toothed ring (8) is meshed with a gear on one of the driving motors;
the ventilation adjusting plate (11) is a circular plate, a second inserting hole (13) is formed in the center of the ventilation adjusting plate (11), the inner wall of the second inserting hole (13) is coaxially and fixedly connected with another bearing, the bearing is fixedly sleeved on the fixed shaft (6), a second toothed ring (12) is fixedly sleeved on the outer side wall of the ventilation adjusting plate (11), the second toothed ring (12) is meshed with a gear on another driving motor, a single-bin air adjusting hole (14) and three-bin air adjusting holes (15) are formed in the ventilation adjusting plate (11), the opening end, close to the function switching column (7), of each three-bin air adjusting hole (15) and the opening end, close to the function switching column (7), of each single-bin air adjusting hole (14) are located on the same diameter, the opening ends, far away from the function switching column (7), of the three-bin air adjusting holes (15) are three in annular distribution by taking the second inserting hole (13) as the circle center;
the inner side wall of an upper end opening of the lower shell (1) is coaxially and fixedly connected with a lower fixed splint (16), the upper end face of the lower fixed splint (16) is provided with a cylindrical groove, the inner bottom wall of the cylindrical groove is provided with three air guide holes (17) distributed in an annular shape, the outer side wall of the lower fixed splint (16) is provided with an annular sliding groove (18), the center of the lower end of the lower fixed splint (16) is fixedly connected with the upper end of a fixed shaft (6), the inner bottom wall of the cylindrical groove is fixedly connected with the lower end of a partition plate (19), the partition plate (19) is fixedly connected with an electronic component (20) and three other groups of sensors through screws, the upper end of the partition plate (19) is fixedly connected with an upper fixed splint (21), the upper fixed splint (21) and the lower fixed splint (16) are identical in structure and are arranged in a mirror image mode, and the lower fixed splint (16) and the upper fixed splint (21) are both in sliding connection with annular sliding strips (24) arranged at the upper end and the lower end of the inner side wall of the upper shell (22) through the annular sliding groove (18);
baffle (19) constitute by the mutual fixed connection of edge of three insulating plane board, and the contained angle between the three plane board is 120, lower solid fixed splint (16), baffle (19), last solid fixed splint (21) and upper portion shell (22) constitute an installation storehouse that has three looks isostructure, every all be provided with a set of sensor in the installation storehouse, a set of the sensor includes temperature sensor and humidity transducer, and electronic component (20) include power component, reactance and resistive element and main control element, and power component, reactance and resistive element set up respectively in three installation storehouse with main control element.
2. The self-adjusting active power filter as claimed in claim 1, wherein an induced draft fan and a metal dust screen are fixedly arranged in the air guide holes (17) of the upper fixing splint (21), and the metal dust screen is fixedly arranged in the air inlet holes (5).
3. The self-adjusting active power filter of claim 1, wherein a detachable cylindrical drying box is arranged in the dehumidifying air hole, a desiccant is arranged in the drying box, a detachable cylindrical dedusting box is arranged in the dedusting air hole, filter screens with different meshes are arranged in the dedusting box, and the inner wall of the radiating air hole is fixedly connected with a small refrigerating device.
4. A self-regulating active power filter as claimed in claim 3, wherein the small refrigeration device, the sensor, the driving motor, the id fan, the power element, the reactance and the resistance element are all electrically connected to the main control element and are all powered by an external power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910398722.XA CN110165671B (en) | 2019-05-14 | 2019-05-14 | Self-adjusting active power filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398722.XA CN110165671B (en) | 2019-05-14 | 2019-05-14 | Self-adjusting active power filter |
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| CN110165671A CN110165671A (en) | 2019-08-23 |
| CN110165671B true CN110165671B (en) | 2022-11-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111130115A (en) * | 2020-01-16 | 2020-05-08 | 成都宏科微波通信有限公司 | Filter |
| CN113224482B (en) * | 2021-05-08 | 2021-12-14 | 扬州斯帕克实业有限公司 | 5G communication ceramic filter |
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| CN206517062U (en) * | 2017-03-07 | 2017-09-22 | 合肥赛沃能源科技有限公司 | A kind of active filter protected with humidity |
| CN107756683A (en) * | 2017-11-06 | 2018-03-06 | 丁水琴 | Adjustable filter in particulate matter recovery system |
| CN207490519U (en) * | 2017-11-30 | 2018-06-12 | 北京金恒科讯节能科技有限公司 | The Active Power Filter-APF of temperature-controllable |
| CN208386152U (en) * | 2018-05-11 | 2019-01-15 | 福建共盈科技有限公司 | A kind of low-voltage active electric power filter master control borad |
| CN208445908U (en) * | 2018-05-28 | 2019-01-29 | 郑州轻工业学院 | A kind of trapezoidal outdoor radiator of active filter |
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| CN110165671A (en) | 2019-08-23 |
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