CN112437576B - Inverter heat dissipation device for photovoltaic power generation - Google Patents
Inverter heat dissipation device for photovoltaic power generation Download PDFInfo
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- CN112437576B CN112437576B CN202011331124.XA CN202011331124A CN112437576B CN 112437576 B CN112437576 B CN 112437576B CN 202011331124 A CN202011331124 A CN 202011331124A CN 112437576 B CN112437576 B CN 112437576B
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- inverter
- heat dissipation
- heat
- lock cylinder
- power generation
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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
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2436—Electromagnetic mechanisms with a holding and a releasing magnet, the holding force being limited due to saturation of the holding magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
-
- 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
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure
-
- 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
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- 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
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20945—Thermal management, e.g. inverter temperature control
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to the technical field of electrical equipment, and discloses an inverter heat dissipation device for photovoltaic power generation, which comprises a heat dissipation shell, wherein an inversion controller is arranged at the bottom inside the heat dissipation shell, heat dissipation blocks are arranged on the front side and the rear side of the inversion controller, heat pipes are uniformly arranged inside the heat dissipation blocks, temperature sensing pipes are arranged at intervals among the heat pipes of the heat dissipation blocks, each temperature sensing pipe comprises a pipe body, a bimetallic strip is arranged in each pipe body, a sealing ring is arranged on the upper portion of each pipe body, a dial plate is connected to the front side bevel gear at the upper end of the bimetallic strip in a meshed mode, a worm is connected to the rear side bevel gear at the upper end of the bimetallic strip in a meshed mode, and an adjusting gear is connected to the right side of the worm in a meshed mode. This inverter heat abstractor for photovoltaic power generation, when the temperature surpassed the early warning value through the gleitbretter connector, deflected to the insulating section of resistance card, the radiating circuit broken circuit, and protector control broken circuit connecting rod resets right, breaks inverter circuit owner and supplies power, can prevent that inverter controller from burning out, guarantees the inverter circuit life-span.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to an inverter heat dissipation device for photovoltaic power generation.
Background
Along with the continuous innovation of photovoltaic cell's technique, up-to-date monocrystalline silicon solar photovoltaic cell not only efficiency promotes by a wide margin, make photovoltaic power plant's power generation cost press below traditional thermal power plant, become energy-concerving and environment-protective new forms of energy generation main force army, and simultaneously, along with the progress of packaging technology, photovoltaic module's life-span has also promoted by a wide margin, originally specially for the inverter design life that photovoltaic module matches has not been matchd, in the actual work, often meet the inverter and work for a long time after because of weeping, cooling system collapse etc. cause electrical components life-span to be shorter than photovoltaic module, have to change the inverter, increase the cost on foot.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the inverter heat dissipation device for photovoltaic power generation, which has the advantages of overheat self-protection and long service life of an inverter circuit, and solves the problems in the background technology.
(II) technical scheme
In order to realize the purposes of self-protection of overheating and long service life of an inverter circuit, the invention provides the following technical scheme: an inverter heat dissipation device for photovoltaic power generation comprises a heat dissipation shell, wherein an inversion controller is arranged at the bottom inside the heat dissipation shell, heat dissipation blocks are arranged on the front side and the rear side of the inversion controller, heat pipes are uniformly arranged inside the heat dissipation blocks, temperature sensing pipes are arranged at intervals of the heat pipes of the heat dissipation blocks and comprise a pipe body, a bimetallic strip is arranged in the pipe body, a sealing ring is arranged on the upper portion of the pipe body, a dial plate is connected to the front side bevel gear at the upper end of the bimetallic strip in a meshed manner, a worm is connected to the rear side bevel gear at the upper end of the bimetallic strip in a meshed manner, an adjusting gear is connected to the right side of the worm in a meshed manner, a slip sheet connector is arranged above the rotating shaft of the adjusting gear, a resistance strip is movably connected to the right end of the slip sheet connector, a protector is arranged on the right side of the resistance strip, and a spring lock cylinder is arranged inside the protector, the spring lock comprises a spring lock cylinder and is characterized in that an electromagnet is arranged on the end side of the spring lock cylinder, a circuit breaking connecting rod is arranged on the right side of a protector, circuit breaking springs are arranged on the front side and the rear side of the circuit breaking connecting rod, a moving contact is arranged at the lower end of the circuit breaking connecting rod, a fixed contact is arranged on the left side of the moving contact, a binding post is movably connected to the right end of the moving contact, heat radiating fins are arranged at the upper end of a heat pipe, and a fan is arranged on the right side of the heat radiating fins.
Preferably, the upper end face of the heat dissipation shell is provided with heat dissipation wave fins, and the interior of the heat dissipation shell is divided into an upper partition part and a lower partition part.
Preferably, the heat dissipation block is abutted against the inverter controller, and the heat pipe embedded in the heat dissipation block extends upwards to the upper space of the heat dissipation shell.
Preferably, the heat conducting medium is filled in the temperature sensing pipe.
Preferably, the resistance card is of an arc structure, one end of the resistance card is provided with a line connector, and the other end of the resistance card is provided with an insulating section.
Preferably, the spring lock cylinder is made of iron materials, the middle part of the spring lock cylinder is provided with a chute buckle, one end of the spring lock cylinder is connected with a return spring, and the other end of the spring lock cylinder is opposite to the electromagnet.
Preferably, the left end of the circuit breaking connecting rod is provided with a buckle head matched with the middle chute buckle of the spring lock cylinder.
Preferably, the power supply line of the fan is connected with the sliding sheet connector, the resistor disc structure and the electromagnet in series.
(III) advantageous effects
Compared with the prior art, the invention provides the inverter heat dissipation device for photovoltaic power generation, which has the following beneficial effects:
1. this inverter heat abstractor for photovoltaic power generation divide into two parts about cutting off through the inside dc-to-ac converter, and the inside bottom of heat dissipation shell is provided with the inverter controller, and the inverter controller is in the lower part space at the during operation, and is separated with top heat dissipation space, effectively prevents to cause the influence that liquid leaked to the inverter circuit caused because of external fault.
2. This inverter heat abstractor for photovoltaic power generation is heated the rotation through bimetallic strip and is driven the gleitbretter connector and slide on the resistive patch, and fan series circuit electric current increases, and the fan speed accelerates to accelerate the heat dissipation of dc-to-ac converter, realize when the temperature variation, automatic control heat radiation intensity.
3. This inverter heat abstractor for photovoltaic power generation when the temperature exceedes the early warning value through the gleitbretter connector, continues to deflect to the insulating section of resistance card, and the radiating circuit opens the circuit, and the connecting rod that the protector control opens the circuit resets right, breaks the inverter circuit owner and supplies power, can prevent that inverter controller from burning out, guarantees the inverter circuit life-span.
4. The inverter heat dissipation device for photovoltaic power generation is controlled by the electromagnetism relay through the inverter circuit-breaking connecting rod, when the main power supply is powered off for a short time due to power grid fluctuation, residual magnetism in the electromagnet cannot disappear immediately, the inverter controller is kept connected, and low voltage ride through is used for preventing a photovoltaic power plant from being off the grid in a large scale.
Drawings
FIG. 1 is a schematic top view of the main structure of the present invention;
FIG. 2 is a front view of the main structure of the present invention;
FIG. 3 is a schematic view of the protector of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 2 according to the present invention;
FIG. 5 is a schematic cross-sectional view taken at the location B-B of FIG. 1 in accordance with the present invention;
FIG. 6 is a schematic cross-sectional view taken at the position C-C of FIG. 2 in accordance with the present invention;
FIG. 7 is a schematic structural view of the temperature sensing tube 5 of the present invention.
In the figure: 1. a heat dissipation housing; 2. an inverter controller; 3. a heat dissipating block; 4. a heat pipe; 5. a temperature sensing tube; 51. a pipe body; 52. a bimetal; 53. sealing a ring; 6. a dial plate; 7. a worm; 8. an adjusting gear; 9. a slip sheet connector; 10. resistance cards; 11. a protector; 12. a spring lock cylinder; 13. an electromagnet; 14. a trip link; 15. a breaking spring; 16. a moving contact; 17. static contact; 18. a binding post; 19. a heat dissipating fin; 20. a fan.
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.
Referring to fig. 1-7, a heat sink for an inverter for photovoltaic power generation comprises a heat sink casing 1, wherein the upper end surface of the heat sink casing 1 is provided with a wave fin for heat dissipation, the interior of the heat sink casing 1 is divided into two parts of an upper partition and a lower partition, the bottom of the interior of the heat sink casing 1 is provided with an inverter controller 2, the front side and the rear side of the inverter controller 2 are provided with heat sinks 3, the interior of the heat sinks 3 is uniformly provided with heat pipes 4, the heat sinks 3 abut against the inverter controller 2, the heat pipes 4 embedded therein extend upwards to the upper space of the heat sink casing 1, the heat pipes 4 of the heat sinks 3 are provided with temperature sensing pipes 5 at intervals, each temperature sensing pipe 5 comprises a pipe body 51, the temperature sensing pipe 5 is filled with a heat conducting medium, a bimetallic strip 52 is arranged in the pipe body 51, the upper part of the pipe body 51 is provided with a sealing ring 53, the front side bevel gear at the upper end of the bimetallic strip 52 is engaged with a dial 6, the rear side bevel gear at the upper end of the bimetallic strip 52 is engaged with a worm 7, an adjusting gear 8 is meshed and connected to the right side of the worm 7, a sliding sheet connector 9 is arranged above a rotating shaft of the adjusting gear 8, a resistor sheet 10 is movably connected to the right end of the sliding sheet connector 9, the resistor sheet 10 is of an arc structure, a circuit connector is arranged at one end of the resistor sheet 10, an insulating section is arranged at the other end of the resistor sheet, a protector 11 is arranged on the right side of the resistor sheet 10, a spring lock cylinder 12 is arranged inside the protector 11, an electromagnet 13 is arranged on the end side of the spring lock cylinder 12, a chute buckle is arranged in the middle of the spring lock cylinder 12, a return spring is connected to one end of the spring lock cylinder, the other end of the spring lock cylinder is opposite to the electromagnet 13, a circuit breaking connecting rod 14 is arranged on the right side of the protector 11, a buckle head matched with the chute buckle in the middle of the spring lock cylinder 12 is arranged at the left end of the circuit breaking connecting rod 14, circuit breaking springs 15 are arranged on the front and back sides of the circuit breaking connecting rod 14, a movable contact 16 is arranged at the lower end of the movable contact 17, the right end of the moving contact 16 is movably connected with a binding post 18, the upper end of the heat pipe 4 is provided with a heat radiating fin 19, the right side of the heat radiating fin 19 is provided with a fan 20, and a power supply circuit of the fan 20 is connected with the sliding sheet connector 9, the resistor disc 10 and the electromagnet 13 in series.
The working principle is as follows: this inverter heat abstractor for photovoltaic power generation, including heat dissipation shell 1, 1 up end of heat dissipation shell is provided with wave fin for the heat dissipation, inside divide into two parts that cut off from top to bottom, the inside bottom of heat dissipation shell 1 is provided with inverter controller 2, inverter controller 2 is in the lower part space at the during operation, separate with top heat dissipation space, effectively prevent to cause the influence that liquid leakage led to the fact inverter circuit because of external fault, the heat that inverter controller 2 produced passes through heat pipe 4 and transmits for top heat dissipation fin 19 and carry out the air cooling heat dissipation.
The heat pipe 4 of the heat radiation block 3 is provided with temperature sensing pipes 5 at intervals, a bimetallic strip 52 is arranged in the temperature sensing pipe 5, a worm 7 is engaged and connected with a rear bevel gear at the upper end of the bimetallic strip 52, an adjusting gear 8 is engaged and connected with the right side of the worm 7, a slip sheet connector 9 is arranged above a rotating shaft of the adjusting gear 8, a resistance sheet 10 is movably connected with the right end of the slip sheet connector 9, a protector 11 is arranged at the right side of the resistance sheet 10, a breaking connecting rod 14 is arranged at the right side of the protector 11, a power supply line of a fan 20 is connected with the slip sheet connector 9, the resistance sheet 10 and an electromagnet 13 in series, when the temperature of the inverter rises, the bimetallic strip 52 is heated to rotate to drive the sliding sheet connector 9 to slide on the resistor sheet 10, the current of the series circuit of the fan 20 is increased, and the rotating speed of the fan 20 is increased, so that the heat dissipation of the inverter is accelerated, and the heat dissipation strength is automatically controlled when the temperature changes. If accidents such as fan 20 failure or air path blockage occur, the sliding sheet connector 9 continues to deflect to the insulation section of the resistor sheet 10 along with temperature rise, the heat dissipation circuit is disconnected, the electromagnet 13 in the protector 11 is disconnected, the disconnection connecting rod 14 is triggered to reset rightwards, the main power supply of the inverter circuit is disconnected, and the inverter controller 2 is prevented from being burnt.
And the inverter circuit-breaking connecting rod 14 is controlled by electromagnetic relay, so that when the main power supply is in short-time power failure due to power grid fluctuation, residual magnetism in the electromagnet 13 cannot disappear immediately, and the inverter controller 2 is kept connected to pass through low voltage so as to prevent the photovoltaic power plant from large-scale grid disconnection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an inverter heat abstractor for photovoltaic power generation, includes heat dissipation shell (1), its characterized in that: the heat dissipation device is characterized in that an inversion controller (2) is arranged at the bottom inside a heat dissipation shell (1), heat dissipation blocks (3) are arranged on the front side and the rear side of the inversion controller (2), heat pipes (4) are uniformly arranged inside the heat dissipation blocks (3), temperature sensing pipes (5) are arranged at intervals on the heat pipes (4) of the heat dissipation blocks (3), each temperature sensing pipe (5) comprises a pipe body (51), a bimetallic strip (52) is arranged in each pipe body (51), a sealing ring (53) is arranged on the upper portion of each pipe body (51), a dial plate (6) is meshed and connected with a front side bevel gear on the upper end of each bimetallic strip (52), a worm (7) is meshed and connected with a rear side bevel gear on the upper end of each bimetallic strip (52), an adjusting gear (8) is meshed and an adjusting gear (8), and a slip sheet connector (9) is arranged above a rotating shaft of the adjusting gear (8), the right end of the slip sheet connector (9) is movably connected with a resistance sheet (10), the right side of the resistance sheet (10) is provided with a protector (11), a spring lock cylinder (12) is arranged inside the protector (11), the end side of the spring lock cylinder (12) is provided with an electromagnet (13), the right side of the protector (11) is provided with a circuit breaking connecting rod (14), the front side and the rear side of the circuit breaking connecting rod (14) are provided with circuit breaking springs (15), the lower end of the circuit breaking connecting rod (14) is provided with a movable contact (16), the left side of the movable contact (16) is provided with a static contact (17), the right end of the movable contact (16) is movably connected with a binding post (18), the upper end of the heat pipe (4) is provided with a heat radiating fin (19), the right side of the heat radiating fin (19) is provided with a fan (20), the resistance sheet is of an arc-shaped structure, and one end of the resistance sheet is provided with a circuit connector, the other end of the spring lock cylinder is made of iron materials, a chute buckle is arranged in the middle of the spring lock cylinder, one end of the spring lock cylinder is connected with a reset spring, the other end of the spring lock cylinder is opposite to an electromagnet, a buckle head matched with the chute buckle in the middle of the spring lock cylinder is arranged at the left end of a circuit breaking connecting rod, a fan power supply line is connected with a sliding sheet connector, a resistor sheet structure and the electromagnet in series, when the temperature of an inverter rises, a bimetallic sheet is heated to rotate to drive the sliding sheet connector to slide on the resistor sheet, the current of a fan series circuit is increased, the rotating speed of the fan is accelerated, the heat dissipation of the inverter is accelerated, the radiating intensity is automatically controlled, a fan fault occurs, the sliding sheet connector continuously deflects to the resistor sheet insulation section along with the rise of the temperature, a radiating circuit is broken, the electromagnet in a protector is broken to trigger the circuit breaking connecting rod to reset rightwards, the main power supply of an inverter circuit is broken, and the inverter controller is prevented from being burnt.
2. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: the upper end face of the heat dissipation shell (1) is provided with heat dissipation wave fins, and the interior of the heat dissipation shell is divided into an upper partition part and a lower partition part.
3. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: the radiating block (3) is close to the inverter controller (2), and a heat pipe (4) embedded in the radiating block extends upwards to the upper space of the radiating shell (1).
4. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: and the temperature sensing pipe (5) is filled with a heat-conducting medium.
5. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: the resistance card (10) is of an arc-shaped structure, one end of the resistance card is provided with a line connector, and the other end of the resistance card is provided with an insulating section.
6. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: the spring lock cylinder (12) is made of iron materials, the middle part of the spring lock cylinder is provided with a chute buckle, one end of the spring lock cylinder is connected with a return spring, and the other end of the spring lock cylinder is opposite to the electromagnet (13).
7. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: the left end of the circuit breaking connecting rod (14) is provided with a buckle head matched with the middle chute buckle of the spring lock cylinder (12).
8. The inverter heat sink for photovoltaic power generation as set forth in claim 1, wherein: and a power supply line of the fan (20) is connected with the slide sheet connector (9), the resistor disc (10) structure and the electromagnet (13) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011331124.XA CN112437576B (en) | 2020-11-24 | 2020-11-24 | Inverter heat dissipation device for photovoltaic power generation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011331124.XA CN112437576B (en) | 2020-11-24 | 2020-11-24 | Inverter heat dissipation device for photovoltaic power generation |
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| CN112437576A CN112437576A (en) | 2021-03-02 |
| CN112437576B true CN112437576B (en) | 2022-01-07 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346533A (en) * | 2013-06-25 | 2013-10-09 | 冯锐 | Circuit structure with protection function |
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| US7738228B2 (en) * | 2005-04-07 | 2010-06-15 | Pv Powered, Inc. | Inverter thermal protection |
| CN203537245U (en) * | 2013-10-25 | 2014-04-09 | 德阳东方汉德电力工程有限公司 | Micro solar inverter system |
| EP3288357B1 (en) * | 2016-08-26 | 2020-07-08 | Deere & Company | Electronic inverter assembly with an integral snubber capacitor |
| CN207265877U (en) * | 2017-07-11 | 2018-04-20 | 长沙市航信电力科技有限公司 | A kind of photovoltaic DC-to-AC converter with radiator structure |
| CN107424742A (en) * | 2017-08-29 | 2017-12-01 | 丁蒙蒙 | A kind of transformer with damping and c /v |
| CN208548837U (en) * | 2018-08-20 | 2019-02-26 | 安徽中皖自动化科技有限公司 | One kind having interference free performance inverter power supply |
| EP3703242B1 (en) * | 2019-03-01 | 2023-04-26 | Siemens Aktiengesellschaft | Switching device for a single or multiphase electric consumer |
| CN210778081U (en) * | 2019-09-10 | 2020-06-16 | 南京先正科技有限公司 | Network resistance continuous adjusting device |
| CN110571002A (en) * | 2019-10-14 | 2019-12-13 | 深圳市富临特科技有限公司 | Resistor for low voltage ride through of wind power generation inverter |
| CN211046742U (en) * | 2019-12-31 | 2020-07-17 | 南通耐维特电源有限公司 | Power conversion device |
| CN111181021B (en) * | 2020-01-19 | 2021-07-16 | 山东吉正电气科技有限公司 | Overheated self-opening switch board based on hot sheetmetal |
| CN111489939A (en) * | 2020-04-09 | 2020-08-04 | 杭州千耘贸易有限公司 | Automatic control device of alternating current distribution equipment based on bimetallic strip principle |
| CN111540646B (en) * | 2020-04-24 | 2022-07-12 | 扬州五岳电器有限公司 | Small-size overcurrent and overheat protector |
| CN111464045B (en) * | 2020-05-11 | 2024-06-11 | 国华卫星数据科技有限公司 | Tree-shaped heat dissipation device of sealed photovoltaic inverter |
| CN111587050A (en) * | 2020-06-05 | 2020-08-25 | 杭州成昌网络科技有限公司 | Memory installation cabinet heat abstractor based on bimetallic strip principle |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103346533A (en) * | 2013-06-25 | 2013-10-09 | 冯锐 | Circuit structure with protection function |
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