CN112638086A - Main control cabinet for wind power generation - Google Patents
Main control cabinet for wind power generation Download PDFInfo
- Publication number
- CN112638086A CN112638086A CN202011517460.3A CN202011517460A CN112638086A CN 112638086 A CN112638086 A CN 112638086A CN 202011517460 A CN202011517460 A CN 202011517460A CN 112638086 A CN112638086 A CN 112638086A
- Authority
- CN
- China
- Prior art keywords
- wall
- control cabinet
- main control
- cabinet body
- power generation
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- Pending
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0234—Feet; Stands; Pedestals, e.g. wheels for moving casing on floor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/22—Adjustable mountings telescopic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/34—Supporting elements displaceable along a guiding element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1438—Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
- H05K7/1452—Mounting of connectors; Switching; Reinforcing of back panels
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20263—Heat dissipaters releasing heat from coolant
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a master control cabinet for wind power generation, which comprises a bottom plate, wherein universal wheels are fixed at four corners of the bottom plate, a fixing frame is welded on the outer wall of the top of the bottom plate, fixing grooves are formed in the outer walls of two sides of the fixing frame, supporting mechanisms are arranged in the two fixing grooves and comprise servo motors, an output shaft of each servo motor is connected with one end of a screw rod through a coupling, the other end of each screw rod is connected with the inner wall of the bottom of each fixing groove through a bearing, and the screw rods are connected with fixing blocks. According to the invention, the universal wheels are arranged at four corners of the bottom plate, so that the main control cabinet body is convenient to move, the placement position of the main control cabinet body is convenient to change at a later stage, and after the main control cabinet body is moved to a proper position, the main control cabinet body can be well supported by the supporting mechanism, so that the main control cabinet body is more stably placed, the main control cabinet body is cooled by water from the outside, the heat dissipation of the main control cabinet body is accelerated, and the service life of electrical components is prolonged.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a main control cabinet for wind power generation.
Background
The control system of the fan is an important component of the fan, undertakes important tasks of fan monitoring, automatic adjustment, maximum wind energy capture realization, good power grid compatibility guarantee and the like, and mainly comprises a monitoring system, a master control system, a variable pitch control system and a frequency conversion system (frequency converter). The main control system is the main body of the fan control system and realizes important control and protection functions of automatic starting, automatic direction adjustment, automatic speed regulation, automatic grid connection, automatic disconnection, automatic fault shutdown, automatic cable unwinding, automatic recording and monitoring and the like.
At present, the main control cabinet for wind power generation which is used more has the following problems: firstly, the mobility is poor, the movement is inconvenient, and the change of the placement position of the main control cabinet is inconvenient in later period; secondly, most of the existing main control cabinets are directly placed on the ground, a large number of electrical components are arranged in the main control cabinet, the ground moisture is heavy, and the direct placement on the ground easily causes the ground moisture to enter the main control cabinet to damp the electrical components, so that economic loss is caused; thirdly, a large number of electrical components in the main control cabinet generate a large amount of heat during working, and the conventional main control cabinet has a single heat dissipation mode and a poor heat dissipation function, does not well dissipate the heat, and can reduce the service life of the electrical components for a long time; fourth, current master control cabinet is at the during operation, and inside electrical components operation can produce partial noise, and when master control cabinet was too much, the noise will grow, influences the surrounding environment.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a main control cabinet for wind power generation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a main control cabinet for wind power generation comprises a bottom plate, universal wheels are fixed on four corners of the bottom plate, a fixing frame is welded on the outer wall of the top of the bottom plate, fixing grooves are formed in the outer walls of two sides of the fixing frame, supporting mechanisms are arranged in the two fixing grooves and comprise servo motors, output shafts of the servo motors are connected with one ends of lead screws through couplings, the other ends of the lead screws are connected with the inner walls of the bottoms of the fixing grooves through bearings, the lead screws are connected with fixing blocks in a threaded mode, a supporting plate is welded on the outer wall of one side of each fixing block, a pressing plate is welded on the outer wall of the bottom of each supporting plate, limiting openings are formed in two ends of the outer wall of the top of each pressing plate, a main control cabinet body is installed on the outer wall of the top of the fixing frame, and the water inlet end of the water pump is communicated with the bottom of the inner wall on one side of the water tank through a water inlet pipe, the water outlet end of the water pump is communicated with the bottom of the inner wall on one side of the C-shaped cooling box through a water outlet pipe, the top of the inner wall on the other side of the C-shaped cooling box is communicated with one end of the inner wall on the top of the water tank through a water return pipe, a semiconductor refrigerating sheet is embedded in the outer wall on one side of the water tank, a sliding groove is formed in.
Preferably, lighting mechanism includes the slider, and the outer wall welding of slider bottom has the telescopic link, the outer wall welding of telescopic link bottom has the mounting panel, and mounting panel bottom outer wall installs the light, light illumination direction is towards the main control cabinet body.
Preferably, the shells on two sides of the protective shell are provided with cavities, and sound insulation cotton is filled in the two cavities.
Preferably, the telescopic link includes the connecting pipe, and connecting pipe inner wall sliding connection has the connecting rod, connecting pipe one side outer wall bottom spiro union has fastening bolt.
Preferably, the outer wall of one side of the protective shell is provided with a mounting opening, and the inner wall of the mounting opening is hinged with a door plate.
Preferably, the top of the inner wall of one side of the water tank, which is far away from the semiconductor refrigeration sheet, is connected with a liquid inlet pipe, and a valve is installed on the liquid inlet pipe.
Preferably, light, servo motor, water pump and semiconductor refrigeration piece all are connected with the switch through the wire, and the switch is connected with external power source through the power cord.
The invention has the beneficial effects that:
1. according to the invention, the universal wheels are arranged at four corners of the bottom plate, so that the main control cabinet body is convenient to move, the placement position of the main control cabinet body is convenient to change at a later stage, and after the main control cabinet body is moved to a proper position, the main control cabinet body can be well supported by the supporting mechanism, so that the main control cabinet body is more stably placed;
2. according to the invention, the main control cabinet body is arranged on the fixing frame, so that the bottom of the main control cabinet body is not contacted with the ground, the phenomenon that the moisture on the ground enters the main control cabinet body to damp electrical elements and cause economic loss is avoided, cooling water in the water tank can be pumped into the C-shaped cooling box through the water pump to cool the main control cabinet body from the outside through water cooling, the heat dissipation of the main control cabinet body is accelerated, and the service life of the electrical elements is prolonged;
3. according to the invention, the cooling water in the water tank can be continuously refrigerated through the semiconductor refrigeration sheet, the cooling effect of the cooling water is ensured, noise generated during the working of the main control cabinet body is reduced through the soundproof cotton, the influence of the noise on the surrounding environment is avoided, and meanwhile, when the main control cabinet body is overhauled at night, the illuminating lamp can be started for auxiliary illumination, so that a worker does not need to hold a flashlight with one hand and hold an overhauling tool with the other hand, and the overhauling is more convenient.
Drawings
Fig. 1 is a front sectional view of a main control cabinet for wind power generation according to the present invention;
FIG. 2 is a partially enlarged view of a main control cabinet for wind power generation according to the present invention;
FIG. 3 is a perspective view of a pressing plate of a main control cabinet for wind power generation according to the present invention;
fig. 4 is a front elevation view of a main control cabinet for wind power generation according to the present invention.
In the figure: the device comprises a base plate 1, a fixing frame 2, a fixing groove 3, a servo motor 4, a screw rod 5, a fixing block 6, a supporting plate 7, a pressing plate 8, a limiting opening 9, a main control cabinet body 10, a protective shell 11, a 12C-type cooling box, a water tank 13, a water pump 14, a semiconductor refrigerating sheet 15, a water return pipe 16, a cavity 17, soundproof cotton 18, a sliding groove 19, a sliding block 20, a telescopic rod 21 and a lighting lamp 22.
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.
Referring to fig. 1-4, a main control cabinet for wind power generation comprises a bottom plate 1 with universal wheels fixed at four corners of the bottom, a fixed frame 2 welded to the outer wall of the top of the bottom plate 1, fixing grooves 3 formed in the outer walls of two sides of the fixed frame 2, and supporting mechanisms arranged in the two fixing grooves 3, wherein the main control cabinet body 10 is convenient to move by arranging the universal wheels at the four corners of the bottom plate 1, so that the placement position of the main control cabinet body 10 can be changed conveniently in the later period, and after the main control cabinet body 10 is moved to a proper position, the main control cabinet body 10 can be supported well through the supporting mechanisms, so that the main control cabinet body 10 can be placed more stably;
the supporting mechanism comprises a servo motor 4, an output shaft of the servo motor 4 is connected with one end of a screw rod 5 through a coupler, the other end of the screw rod 5 is connected with the inner wall of the bottom of a fixed groove 3 through a bearing, a fixed block 6 is screwed on the screw rod 5, a supporting plate 7 is welded on the outer wall of one side of the fixed block 6, a pressing plate 8 is welded on the outer wall of the bottom of the supporting plate 7, two ends of the outer wall of the top of the pressing plate 8 are respectively provided with a limiting opening 9, the outer wall of the top of a fixed frame 2 is provided with a main control cabinet body 10, the outer wall of the top of the fixed frame 2 is welded with a protective shell 11, the outer wall of one side of the protective shell 11 is provided with a mounting opening, the inner wall of the mounting opening is hinged with a door plate, the shells on two sides of the protective shell 11 are respectively provided, the problem that the electrical components are affected with damp due to the fact that ground moisture enters the main control cabinet body 10 and economic loss is caused is avoided, cooling water in the water tank 13 can be pumped into the C-shaped cooling box 12 through the water pump 14, the main control cabinet body 10 is cooled through water cooling from the outside, heat dissipation of the main control cabinet body 10 is accelerated, and the service life of the electrical components is prolonged;
the water tank 13 is arranged on the outer wall of the top of the bottom plate 1, the top of the inner wall of the water tank 13, which is far away from the semiconductor refrigeration piece 15, is connected with a liquid inlet pipe, a valve is arranged on the liquid inlet pipe, the water pump 14 is arranged on the outer wall of the top of the bottom plate 1, the water inlet end of the water pump 14 is communicated with the bottom of the inner wall of one side of the water tank 13 through a water inlet pipe, the water outlet end of the water pump 14 is communicated with the bottom of the inner wall of one side of the C-type cooling tank 12 through a water outlet pipe, the top of the inner wall of the other side of the C-type cooling tank 12 is communicated with one end of the inner wall of the top of the water tank 13 through a water return pipe 16, the semiconductor refrigeration piece 15 is embedded on the outer wall of one side of the water tank 13, the cooling effect of the cooling, the illuminating lamp 22 can be started for auxiliary illumination, so that a worker does not need to hold the flashlight with one hand and hold the maintenance tool with the other hand, and the maintenance is more convenient;
and 11 top inner walls of protecting crust have spout 19, 19 inner walls of spout sliding connection have lighting mechanism, lighting mechanism includes slider 20, and the outer wall welding of slider 20 bottom has telescopic link 21, telescopic link 21 includes the connecting pipe, and connecting pipe inner wall sliding connection has the connecting rod, connecting pipe one side outer wall bottom spiro union has fastening bolt, 21 bottom outer wall welding of telescopic link has the mounting panel, and mounting panel bottom outer wall installs light 22, servo motor 4, water pump 14 and semiconductor refrigeration piece 15 all are connected with the switch through the wire, and the switch is connected with external power source through the power cord, light 22 shines the direction and faces main control cabinet body 10.
The main control cabinet body 10 is pushed to a proper position, the lead screw 5 is driven to rotate through the servo motor 4, the fixing block 6 can move downwards in the fixing groove 3, the pressing plate 8 is driven to press the ground and compress the ground, the main control cabinet body 10 is well supported, meanwhile, the limiting port 9 can limit the universal wheel, the main control cabinet body 10 is more stably placed, cooling water is filled into the water tank 13 through the liquid inlet pipe, the cooling water in the water tank 13 is pumped into the C-shaped cooling box 12 through the water pump 14, the main control cabinet body 10 is cooled by water from the outside, heat dissipation of the main control cabinet body 10 is accelerated, the service life of electrical components is prolonged, the cooling water in the C-shaped cooling box 12 flows back into the water tank 13 through the water return pipe 16 after being full of water, circulation is formed, and the cooling water in the water tank 13 is continuously refrigerated through the semiconductor refrigeration piece 15, guarantee the cooling effect of cooling water, noise that soundproof cotton 18 produced main control cabinet body 10 during operation is fallen and is fallen, avoid the noise to influence the surrounding environment, when overhauing main control cabinet body 10 at night, startable light 22 carries out the auxiliary lighting, accessible slider 20 slides in spout 19, change the horizontal lighting position of light 22, through the length of adjusting telescopic link 21, change light 22's vertical lighting position.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A main control cabinet for wind power generation comprises a bottom plate (1) with universal wheels fixed on four corners of the bottom, and is characterized in that a fixing frame (2) is welded on the outer wall of the top of the bottom plate (1), fixing grooves (3) are formed in the outer walls of two sides of the fixing frame (2), two supporting mechanisms are arranged in the fixing grooves (3) and comprise servo motors (4), an output shaft of each servo motor (4) is connected with one end of a lead screw (5) through a coupler, the other end of each lead screw (5) is connected with the inner wall of the bottom of each fixing groove (3) through a bearing, a fixing block (6) is screwed on each lead screw (5), a supporting plate (7) is welded on the outer wall of one side of each fixing block (6), a pressing plate (8) is welded on the outer wall of the bottom of each supporting plate (7), limiting openings (9) are formed in two ends of the outer, and mount (2) top outer wall welding has protecting crust (11), C type cooler bin (12) have been cup jointed to main control cabinet body (10) outer wall, and bottom plate (1) top outer wall installs water tank (13), water pump (14) are installed to bottom plate (1) top outer wall, and water pump (14) intake end is linked together through inlet tube and water tank (13) one side inner wall bottom, water pump (14) play water end is linked together through outlet pipe and C type cooler bin (12) one side inner wall bottom, and C type cooler bin (12) opposite side inner wall top is linked together through wet return (16) and water tank (13) top inner wall one end, water tank (13) one side outer wall inlays and is equipped with semiconductor refrigeration piece (15), and protecting crust (11) top inner wall opens there is spout (19), spout (19) inner wall sliding connection has lighting mechanism.
2. The main control cabinet for wind power generation according to claim 1, wherein the lighting mechanism comprises a sliding block (20), a telescopic rod (21) is welded on the outer wall of the bottom of the sliding block (20), a mounting plate is welded on the outer wall of the bottom of the telescopic rod (21), a lighting lamp (22) is installed on the outer wall of the bottom of the mounting plate, and the lighting direction of the lighting lamp (22) faces to the main control cabinet body (10).
3. The main control cabinet for wind power generation according to claim 1, wherein the two side shells of the protective shell (11) are provided with cavities (17), and sound insulation cotton (18) is filled in the two cavities (17).
4. The main control cabinet for wind power generation according to claim 2, wherein the telescopic rod (21) comprises a connecting pipe, a connecting rod is slidably connected to the inner wall of the connecting pipe, and a fastening bolt is screwed to the bottom of the outer wall of one side of the connecting pipe.
5. The main control cabinet for wind power generation according to claim 1, wherein the outer wall of one side of the protective shell (11) is provided with a mounting opening, and the inner wall of the mounting opening is hinged with a door panel.
6. The main control cabinet for wind power generation according to claim 1, wherein a liquid inlet pipe is connected to the top of the inner wall of the water tank (13) far away from the semiconductor refrigeration sheet (15), and a valve is installed on the liquid inlet pipe.
7. The main control cabinet for wind power generation according to claim 2, wherein the lighting lamp (22), the servo motor (4), the water pump (14) and the semiconductor refrigeration sheet (15) are all connected with a switch through wires, and the switch is connected with an external power supply through a power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011517460.3A CN112638086A (en) | 2020-12-21 | 2020-12-21 | Main control cabinet for wind power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011517460.3A CN112638086A (en) | 2020-12-21 | 2020-12-21 | Main control cabinet for wind power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112638086A true CN112638086A (en) | 2021-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011517460.3A Pending CN112638086A (en) | 2020-12-21 | 2020-12-21 | Main control cabinet for wind power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112638086A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113329591A (en) * | 2021-05-08 | 2021-08-31 | 江西源能电气技术有限公司 | Frequency converter with cooling function |
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| CN108597361A (en) * | 2018-03-19 | 2018-09-28 | 赵海平 | A kind of gardens energy saving and environment friendly signage apparatus for being convenient for changing position |
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| CN113329591A (en) * | 2021-05-08 | 2021-08-31 | 江西源能电气技术有限公司 | Frequency converter with cooling function |
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Application publication date: 20210409 |