Photovoltaic inverter capacitor dedicated discharging device

Abstract

The utility model relates to a capacitor discharge technical field especially is a photovoltaic inverter capacitor special discharge device, including the shell, the shell inside is equipped with the insulating mounting panel, the insulating mounting panel both sides are fixed with discharge needle one and discharge needle two respectively, through the double current -limiting effect of cement resistance and current -limiting resistance, effectively limited the discharge current, avoided the electric shock danger and equipment damage because of instantaneous high current, significantly improved the security of operation, equipped with two -way non -polar light emitting diode, can directly show the discharge state, and the operator can clearly judge whether discharge is in progress or whether the completion through the light -out of light emitting diode, avoided the risk of misoperation, the design of first limit triangular block and second limit triangular block ensured that discharge needle kept stable contact in the discharge process, prevented accidental reset because of spring elasticity, further guaranteed the security of discharge process.

Description

Technical Field

[0001] This utility model relates to the field of capacitor discharge technology, specifically a dedicated discharge device for photovoltaic inverter capacitors. Background Technology

[0002] With the rapid development of the photovoltaic industry, photovoltaic inverters, as the core equipment of photovoltaic power generation systems, are becoming increasingly important. The main function of a photovoltaic inverter is to convert the direct current (DC) generated by photovoltaic panels into alternating current (AC) for grid connection or power supply to loads. In the circuit of a photovoltaic inverter, capacitors are indispensable components, used for filtering, energy storage, and voltage stabilization.

[0003] During the maintenance, repair, or replacement of photovoltaic inverters, the electrical energy stored in the capacitors may pose a risk of electric shock to operators and could even damage the equipment. Therefore, it is essential to ensure that the electrical energy in the capacitors is safely released before any maintenance or operation. Furthermore, residual electrical energy in the capacitors can also affect the inverter's performance and lifespan; therefore, the capacitors also need to be discharged when the equipment is shut down or when switching operating modes.

[0004] Currently, common capacitor discharge methods mainly include the following: Manual short-circuiting: Discharge is achieved by directly short-circuiting the two plates of the capacitor with a wire. This method is simple to operate but poses serious safety hazards, easily leading to electric shock accidents and potentially damaging the capacitor or other circuit components due to the instantaneous large current. Resistor discharge: Discharge is achieved by connecting a resistor in the circuit. Although this method is relatively safe, it requires precise calculation of the resistance value, and the discharge speed is slow and inefficient. Dedicated discharge equipment: Some capacitor discharge equipment exists on the market, but most are large, expensive, and complex to operate, making them unsuitable for rapid on-site maintenance and repair. Therefore, a dedicated discharge device for photovoltaic inverter capacitors is needed to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide a dedicated discharge device for photovoltaic inverter capacitors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dedicated discharge device for photovoltaic inverter capacitors, comprising a housing, an insulating mounting plate inside the housing, a discharge needle one and a discharge needle two fixedly mounted on both sides of the insulating mounting plate, a cement resistor connected between the discharge needle one and the discharge needle two via a wire, a bidirectional electrodeless light-emitting diode connected to the discharge needle one via a wire, and a current-limiting resistor connected to the discharge needle two via a wire.

[0007] As a preferred embodiment of this utility model, the bidirectional electrodeless light-emitting diode is fixedly disposed on the surface of the outer shell, and the bidirectional electrodeless light-emitting diode is connected to the current-limiting resistor through a wire.

[0008] As a preferred embodiment of this utility model, slide rails are fixedly provided on both sides inside the outer shell, and sliders are fixedly provided on both sides of the insulating mounting plate, with the sliders slidably disposed on the surface of the slide rails.

[0009] As a preferred embodiment of this utility model, a spring is fixedly provided at the lower end of the insulating mounting plate, and the other end of the spring is fixed to the bottom of the outer shell.

[0010] As a preferred embodiment of this utility model, the outer shell surface is provided with a sliding groove, and a toggle block is slidably provided inside the sliding groove, and the toggle block is fixedly connected to the insulating mounting plate.

[0011] As a preferred embodiment of this utility model, the outer shell is provided with a storage groove, and an L-shaped connecting rod is slidably provided inside the storage groove. A button is fixedly provided at one end of the L-shaped connecting rod, and a second limiting triangular block is fixedly provided at the other end of the L-shaped connecting rod. A second spring is provided inside the storage groove, with one end of the second spring being attached to the button and the other end of the second spring being attached to the inner surface of the storage groove.

[0012] As a preferred embodiment of this utility model, a first limiting triangle block is fixedly provided on one side of the insulating mounting plate corresponding to the surface of the second limiting triangle block, and the hypotenuses of the first limiting triangle block and the second limiting triangle block are correspondingly provided.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model effectively limits the discharge current through the dual current-limiting effect of cement resistance and current-limiting resistor, avoiding the danger of electric shock and equipment damage caused by instantaneous large current, and significantly improving operational safety. It is equipped with bidirectional electrodeless light-emitting diodes, which can intuitively display the discharge status. Operators can clearly judge whether the discharge is in progress or has been completed by the on / off state of the light-emitting diodes, avoiding the risk of misoperation. The design of the first and second limit triangle blocks ensures that the discharge needle maintains stable contact during the discharge process, preventing accidental reset due to spring force, and further ensuring the safety of the discharge process.

[0015] 2. This utility model adopts a mechanical operation method using toggle blocks and buttons, which is simple and intuitive to operate. It does not require complicated electrical operations or professional tools, making it suitable for rapid on-site maintenance and repair. Through the elastic reset mechanism of the spring, the device can quickly return to the initial state, preparing for the next discharge operation, thus improving work efficiency. The overall structure is compact, easy to carry and use, and is particularly suitable for on-site maintenance and repair of photovoltaic inverters, reducing the workload of operators. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall internal front structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall internal side structure of this utility model;

[0019] Figure 4 This is a schematic diagram showing the overall and partial enlarged structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the overall bottom view of the present invention;

[0021] Figure 6 This is a schematic diagram of the overall side view structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the overall front structure of this utility model.

[0023] In the diagram: 1. Bidirectional non-polar light-emitting diode; 2. Current-limiting resistor; 3. Housing; 4. Slide rail; 5. Slider; 6. Discharge needle one; 7. Cement resistor; 8. Insulating mounting plate; 9. Spring one; 10. Discharge needle two; 11. Slide groove; 12. Toggle block; 13. Button; 14. Spring two; 15. L-shaped connecting rod; 16. First limiting triangle block; 17. Second limiting triangle block; 18. Storage slot. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figure 1-7 This utility model provides a technical solution: a special discharge device for photovoltaic inverter capacitors, including a shell 3, an insulating mounting plate 8 inside the shell 3, a discharge needle 6 and a discharge needle 10 fixed on both sides of the insulating mounting plate 8 respectively, a cement resistor 7 connected between the discharge needle 6 and the discharge needle 10 by a wire, a bidirectional electrodeless light-emitting diode 1 connected to the discharge needle 6 by a wire, and a current-limiting resistor 2 connected to the discharge needle 10 by a wire. The operator pushes the insulating mounting plate 8 to slide by moving a toggle block 12; the toggle block 12 is fixedly connected to the insulating mounting plate 8, so the movement of the toggle block 12 will drive the insulating mounting plate 8 to slide along the slide rail 4; as the insulating mounting plate 8 slides, the discharge needle 6 and the discharge needle 10 gradually extend and eventually contact the two plates of the photovoltaic inverter capacitor;

[0029] When the insulating mounting plate 8 slides to the appropriate position, the first limiting triangle 16 and the second limiting triangle 17 engage to prevent the spring 9 from pushing the insulating mounting plate 8 back to its original position. This engagement mechanism ensures that the discharge needle 6 and the discharge needle 10 remain in contact with the capacitor during the discharge process.

[0030] As an example of this utility model, the bidirectional electrodeless light-emitting diode 1 is fixedly disposed on the surface of the housing 3, and the bidirectional electrodeless light-emitting diode 1 is connected to the current-limiting resistor 2 through a wire. After the discharge needle 1 6 and the discharge needle 2 10 come into contact with the capacitor, the electrical energy in the capacitor forms a discharge circuit through the discharge needle, the cement resistor 7 and the current-limiting resistor 2.

[0031] The bidirectional electrodeless light-emitting diode 1 emits light after the discharge circuit is formed, indicating to the operator that the device is working;

[0032] The electrical energy in the capacitor is discharged through discharge needle 6 and discharge needle 10, then through cement resistor 7 and current-limiting resistor 2. Cement resistor 7 and current-limiting resistor 2 serve to limit the current and protect the circuit, preventing the discharge current from being too large and damaging the circuit.

[0033] The bidirectional electrodeless light-emitting diode 1 continues to emit light, indicating that the discharge process is in progress;

[0034] When all the electrical energy in the capacitor is discharged, the bidirectional non-polar LED 1 turns off, indicating that the discharge is complete.

[0035] As an example of this utility model, slide rails 4 are fixedly provided on both sides inside the outer shell 3, and sliders 5 are fixedly provided on both sides of the insulating mounting plate 8. The sliders 5 are slidably disposed on the surface of the slide rails 4.

[0036] As an example of this utility model, a spring 9 is fixedly provided at the lower end of the insulating mounting plate 8, and the other end of the spring 9 is fixed to the bottom of the outer shell 3.

[0037] As an example of this utility model, the surface of the outer shell 3 is provided with a groove 11, and a toggle block 12 is slidably provided inside the groove 11. The toggle block 12 is fixedly connected to the insulating mounting plate 8.

[0038] As an example of this utility model, the outer shell 3 is provided with a storage groove 18 inside, and an L-shaped connecting rod 15 is slidably provided inside the storage groove 18. A button 13 is fixedly provided at one end of the L-shaped connecting rod 15, and a second limiting triangular block 17 is fixedly provided at the other end of the L-shaped connecting rod 15. A second spring 14 is provided inside the storage groove 18. One end of the second spring 14 is attached to the button 13, and the other end of the second spring 14 is attached to the inner surface of the storage groove 18.

[0039] As an example of this utility model, a first limiting triangle 16 is fixedly provided on one side of the insulating mounting plate 8 corresponding to the surface of the second limiting triangle 17, and the hypotenuses of the first limiting triangle 16 and the second limiting triangle 17 are correspondingly set. The operator can manually press the button 13 to release the latching state of the first limiting triangle 16 and the second limiting triangle 17.

[0040] Spring 9 returns to its elastic deformation, pushing the insulating mounting plate 8 to slide back to its original position. Discharge needle 6 and discharge needle 10 retract, and the device returns to its initial state.

[0041] Working principle: During use, the insulating mounting plate 8 is in its initial position under the action of spring 9, the discharge needle 6 and discharge needle 10 are in the retracted state and not in contact with the capacitor, the first limiting triangle block 16 and the second limiting triangle block 17 are in the separated state, spring 9 is in the naturally extended state, and the bidirectional electrodeless light-emitting diode 1 is in the off state, indicating that the device is not working; the operator pushes the insulating mounting plate 8 to slide by moving the toggle block 12; the toggle block 12 is fixedly connected to the insulating mounting plate 8, so the movement of the toggle block 12 will drive the insulating mounting plate 8 to slide along the slide rail 4;

[0042] As the insulating mounting plate 8 slides, discharge needle 6 and discharge needle 10 gradually extend and eventually contact the two plates of the photovoltaic inverter capacitor. When the insulating mounting plate 8 slides to the appropriate position, the first limiting triangle 16 and the second limiting triangle 17 engage to prevent the spring 9 from pushing the insulating mounting plate 8 back to its original position. This engagement mechanism ensures that discharge needle 6 and discharge needle 10 maintain contact with the capacitor during the discharge process.

[0043] After discharge needle 6 and discharge needle 10 come into contact with the capacitor, the electrical energy in the capacitor forms a discharge circuit through the discharge needle, cement resistor 7, and current-limiting resistor 2. The bidirectional electrodeless LED 1 illuminates after the discharge circuit is formed, indicating to the operator that the device is working. The electrical energy in the capacitor is discharged through discharge needle 6 and discharge needle 10, then through cement resistor 7 and current-limiting resistor 2. Cement resistor 7 and current-limiting resistor 2 limit the current and protect the circuit, preventing excessive discharge current from damaging the circuit. The bidirectional electrodeless LED 1 continues to illuminate, indicating that the discharge process is in progress. When the electrical energy in the capacitor is completely discharged, the bidirectional electrodeless LED 1 turns off, indicating that the discharge is complete. The operator can manually press button 13 to release the engagement of the first limiting triangle 16 and the second limiting triangle 17. Spring 9 returns to its elastic deformation, pushing the insulating mounting plate 8 to slide back to its original position, and discharge needles 6 and 10 retract, restoring the device to its initial state.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dedicated discharge device for photovoltaic inverter capacitors, comprising a housing (3), characterized in that: The outer shell (3) is provided with an insulating mounting plate (8). On both sides of the insulating mounting plate (8), a discharge needle one (6) and a discharge needle two (10) are fixed. A cement resistor (7) is connected between the discharge needle one (6) and the discharge needle two (10) by a wire. A bidirectional electrodeless light-emitting diode (1) is connected to the discharge needle one (6) by a wire. A current-limiting resistor (2) is connected to the discharge needle two (10) by a wire.

2. The dedicated discharge device for photovoltaic inverter capacitors according to claim 1, characterized in that: The bidirectional electrodeless light-emitting diode (1) is fixedly disposed on the surface of the housing (3), and the bidirectional electrodeless light-emitting diode (1) is connected to the current-limiting resistor (2) through a wire.

3. The dedicated discharge device for photovoltaic inverter capacitors according to claim 2, characterized in that: The inner sides of the outer shell (3) are fixedly provided with slide rails (4), and the sides of the insulating mounting plate (8) are fixedly provided with sliders (5), which are slidably disposed on the surface of the slide rails (4).

4. The dedicated discharge device for photovoltaic inverter capacitors according to claim 3, characterized in that: The lower end of the insulating mounting plate (8) is fixedly provided with a spring (9), and the other end of the spring (9) is fixed to the bottom of the outer shell (3).

5. A dedicated discharge device for photovoltaic inverter capacitors according to claim 4, characterized in that: The outer shell (3) has a groove (11) on its surface, and a toggle block (12) is slidably provided inside the groove (11). The toggle block (12) is fixedly connected to the insulating mounting plate (8).

6. A dedicated discharge device for photovoltaic inverter capacitors according to claim 5, characterized in that: The outer shell (3) has a storage groove (18) inside, and an L-shaped connecting rod (15) is slidably provided inside the storage groove (18). A button (13) is fixedly provided at one end of the L-shaped connecting rod (15), and a second limiting triangular block (17) is fixedly provided at the other end of the L-shaped connecting rod (15). A second spring (14) is provided inside the storage groove (18). One end of the second spring (14) is attached to the button (13), and the other end of the second spring (14) is attached to the inner surface of the storage groove (18).

7. A dedicated discharge device for photovoltaic inverter capacitors according to claim 6, characterized in that: The insulating mounting plate (8) is fixedly provided with a first limiting triangle block (16) on one side corresponding to the surface of the second limiting triangle block (17), and the hypotenuses of the first limiting triangle block (16) and the second limiting triangle block (17) are set accordingly.

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