Photovoltaic inverter protection device

Abstract

The invention belongs to the technical field of photovoltaic inverters, and provides a photovoltaic inverter protection device, which comprises an inverter box body, and limiting seats are fixed on two side walls of the inverter box body; the protection assembly comprises a lifting sleeve, a first spring, a second spring, a clamping block, a fixing plate, a top plate and a heat conducting plate; according to the invention, through the arrangement of the protection assembly, the lifting sleeve can tightly surround the wiring end at the bottom of the inverter box body after descending, so that sand and dust are effectively prevented from entering the wiring part, the problems of short circuit, poor contact and the like caused by sand and dust accumulation are prevented, the stability of the wiring end is greatly improved, the inverter can normally work in a severe environment for a long time, and the service life of the inverter is prolonged. Equipment faults and maintenance cost caused by environmental factors are reduced, and the service life of equipment and the stable operation time of the whole photovoltaic system are prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic inverters, in particular to a photovoltaic inverter protection device. Background Art

[0002] With the widespread use of renewable energy, photovoltaic inverters are increasingly used in various environments, including harsh environments such as deserts. In desert areas, the climate conditions are extreme, with adverse factors such as high temperature and dust. High temperature may affect the normal operation of the inverter, reducing its efficiency and life, while dust can easily corrode key components such as the wiring parts of the inverter, leading to poor contact, short circuit and other faults, thus affecting the stability and reliability of the entire photovoltaic power generation system.

[0003] In desert environments, existing photovoltaic inverter boxes lack effective protection measures for wiring parts, which makes it easy for sand and dust to enter key parts such as wiring terminals, causing problems such as line short circuits and poor contact, affecting the normal operation of the inverter and the performance stability of the entire photovoltaic system.

[0004] To this end, those skilled in the art have proposed a photovoltaic inverter protection device to solve the problems raised in the background technology. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a photovoltaic inverter protection device to solve the problem that the photovoltaic inverter box in the prior art lacks effective protection measures for the wiring parts, resulting in dust easily entering key parts such as the wiring terminals.

[0006] A photovoltaic inverter protection device comprises: an inverter box, both side walls of the inverter box are fixed with limited seats;

[0007] A protective component, comprising a lifting sleeve, a first spring, a second spring, a clamping block, a fixed plate, a top plate and a heat conducting plate; the lifting sleeve is slidably mounted on the peripheral side of the inverter box, both inner walls of the lifting sleeve are provided with stretching grooves, the limit seat slides in the stretching grooves, the first spring is connected between the top wall of the stretching groove and the upper surface of the limit seat, a positioning groove is provided at the side wall of the limit seat, the second spring is connected to the positioning groove, one end of the second spring is connected to the clamping block, the fixed plate is fixed to the side wall of the lifting sleeve, and a clamping groove is penetrated at the inner wall of the fixed plate, and the clamping block is engaged with the clamping groove;

[0008] The top plate slides in the card slot, and a button is connected to the side wall of the top plate; the heat conducting plate is symmetrically installed at the front and rear end surfaces of the lifting sleeve.

[0009] Preferably, the card block is a wedge-shaped plate structure, the top plate is located corresponding to the card block, a through hole is passed through the side wall of the card slot, and the button passes through the through hole.

[0010] Preferably, a bottom groove is provided on the bottom surface of the lifting sleeve, a rotating plate is rotatably connected to the inner wall of the bottom groove, a rotating shaft is connected between the rotating plate and the bottom groove, and a plurality of auxiliary fans are installed in an array on the surface of the rotating plate.

[0011] Preferably, a side groove is formed on the inner wall of the bottom groove, a third spring is connected to the side groove, one end of the third spring is connected to a top block, the position of the top block corresponds to the bottom wall of the rotating plate, and a chamfered portion is provided on the side wall of the top block.

[0012] Preferably, a plurality of heat dissipation fins are arrayed on the surface of the heat conducting plate.

[0013] Preferably, a wiring terminal is installed on the bottom wall of the inverter box, and a plurality of wiring slots are provided on the bottom surface of the wiring terminal, and the positions of the wiring slots correspond to the rotating plate.

[0014] Preferably, a radiator and heat sinks are installed inside the inverter box, and a control panel is installed on the front end surface of the inverter box.

[0015] Preferably, a hanging plate is fixedly connected to the upper surface of the inverter box, and a plurality of mounting holes penetrate through the hanging plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a protective component, and the lifting sleeve can tightly surround the bottom terminal of the inverter box after it is lowered, effectively blocking dust from entering the wiring position, preventing problems such as line short circuit and poor contact caused by dust accumulation, greatly improving the stability of the wiring terminal, ensuring that the inverter can work normally in long-term harsh environments, reducing equipment failures and maintenance costs caused by environmental factors, and extending the service life of the equipment and the stable operation time of the entire photovoltaic system; after the lifting sleeve is lowered, the bottom of the heat dissipation fin is away from the heat source, and the auxiliary fan is used to further optimize the heat dissipation effect, preventing the inverter performance degradation and failure due to high temperature, and ensuring the efficient and stable operation of the inverter in a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the isometric three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the present invention;

[0020] Figure 3 for Figure 2 A partial enlarged view of part A;

[0021] Figure 4 for Figure 2 A partial enlarged view of part B.

[0022] In the figure:

[0023] 1. Inverter box; 2. Limit seat; 3. Lifting sleeve; 4. Stretching slot; 5. First spring; 6. Positioning slot; 7. Second spring; 8. Block; 9. Fixing plate; 10. Slot; 11. Top plate; 12. Button; 13. Bottom slot; 14. Turntable; 1401. Shaft; 15. Auxiliary fan; 16. Side slot; 17. Third spring; 18. Top block; 1801. Chamfered part; 19. Wiring slot; 20. Wiring terminal; 21. Radiator; 22. Hanging plate; 23. Mounting hole; 24. Control panel; 25. Heat conduction plate; 26. Heat sink fins; 27. Heat sink. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] Embodiment 1: As shown in the attached Figure 1 As shown: The present invention provides a photovoltaic inverter protection device, including an inverter box 1 and a protection component;

[0026] The two side walls of the inverter box 1 are fixed with limit seats 2;

[0027] As attached Figure 2 and attached Figure 3 As shown: the protection assembly includes a lifting sleeve 3, a first spring 5, a second spring 7, a clamping block 8, a fixing plate 9, a top plate 11 and a heat conducting plate 25;

[0028] The lifting sleeve 3 is slidably installed on the side of the inverter box 1. The lifting sleeve 3 is a frame structure. By setting the lifting sleeve 3, it can be wrapped around the side of the inverter box 1. When the lifting sleeve 3 is lowered, it can surround the wiring terminal at the bottom of the inverter box 1 to protect the wiring part, prevent dust from entering the wiring part, and ensure the stability of the wiring terminal so that it can be used for a long time in a desert environment; both inner walls of the lifting sleeve 3 are provided with stretching grooves 4, and the limit seat 2 slides in the stretching grooves 4. The first spring 5 is connected between the top wall of the stretching groove 4 and the upper surface of the limit seat 2. When the lifting sleeve 3 is lifted and the bottom surface of the lifting sleeve 3 is flush with the bottom surface of the inverter box 1, the first spring 5 is in a stretched state; when the limit of the lifting sleeve 3 is released, the first spring 5 is reset, and the lifting sleeve 3 is quickly lowered to protect the wiring part;

[0029] A positioning groove 6 is provided at the side wall of the limit seat 2, and the second spring 7 is connected to the positioning groove 6. One end of the second spring 7 is connected to the clamping block 8. The fixing plate 9 is fixed to the side wall of the lifting sleeve 3, and the inner wall of the fixing plate 9 is penetrated with a clamping groove 10, and the clamping block 8 is engaged with the clamping groove 10; the clamping block 8 is a wedge-shaped plate structure, the position of the top plate 11 corresponds to the clamping block 8, the side wall of the clamping groove 10 is penetrated with a through hole, and the button 12 penetrates the through hole; when the lifting sleeve 3 is lifted, the first spring 5 is stretched, and the clamping block 8 is wedged The guide of the shaped part is pressed into the positioning groove 6. When the lifting sleeve 3 is lifted until the bottom surface is flush with the bottom surface of the inverter box 1, the positioning groove 6 is aligned with the card slot 10. At this time, the card block 8 loses resistance, and the second spring 7 pops out the card block 8. After the card block 8 is stuck in the card slot 10, the position of the lifting sleeve 3 is locked, so that the position of the lifting sleeve 3 is lifted and fixed. When the lifting sleeve 3 is lifted, the wiring part at the bottom of the inverter box 1 is exposed, so that the wiring operation can be conveniently performed;

[0030] And because the fixing plates 9 are fixed on both sides of the lifting sleeve 3, the lifting sleeve 3 can be quickly lifted by two sets of fixing plates 9;

[0031] When the lifting sleeve 3 needs to be lowered, the buttons 12 on both sides are pressed. When the buttons 12 are pressed, the top plate 11 pushes the block 8 out of the slot 10, thereby releasing the limit of the block 8. At this time, the first spring 5 is quickly reset to lower the lifting sleeve 3, thereby forming a protection for the wiring part of the lifting sleeve 3.

[0032] Among them, the top plate 11 slides in the slot 10, and a button 12 is connected to the side wall of the top plate 11; the heat conducting plate 25 is symmetrically installed at the front and rear end surfaces of the lifting sleeve 3; a plurality of heat dissipation fins 26 are arrayed on the surface of the heat conducting plate 25; and because the heat conducting plate 25 is always in contact with the inverter case 1, it can further conduct the internal heat of the inverter case 1, and cooperate with the heat dissipation fins 26 to quickly dissipate the heat inside the inverter; when the lifting sleeve 3 is lowered, the bottom of the heat dissipation fins 26 is kept away from the heat source of the inverter case 1, thereby further improving the heat dissipation effect.

[0033] A radiator 21 and a heat sink 27 are installed inside the inverter housing 1, and a control panel 24 is installed on the front face of the inverter housing 1; the heat inside the inverter housing 1 can be quickly conducted through the radiator 21 and the heat sink 27.

[0034] A hanging plate 22 is fixedly connected to the upper surface of the inverter box 1 , and a plurality of mounting holes 23 are penetrated through the hanging plate 22 ; the device can be stably installed through the hanging plate 22 and the mounting holes 23 .

[0035] As can be seen from the above, the inverter box 1 is firmly mounted on the pre-built support structure using bolts and nuts through the hanging plate 22 and the mounting holes 23 on the upper surface of the inverter box 1.

[0036] In the initial state, the lifting cover 3 is in the lowered position, covering and protecting the wiring terminals 20 at the bottom of the inverter box 1, so as to prevent the wiring parts from being contaminated by foreign objects such as sand and dust during transportation and storage.

[0037] When wiring operation is required, the operator lifts the lifting sleeve 3 upward by operating the fixing plates 9 on both sides. During the lifting process, the limit seat 2 of the lifting sleeve 3 slides upward in the stretching groove 4, and the first spring 5 is stretched. The clamping block 8 is squeezed by the positioning groove 6 and the fixing plate 9 due to its wedge-shaped structure and is pressed into the positioning groove 6.

[0038] When the lifting sleeve 3 is lifted until its bottom surface is flush with the bottom surface of the inverter box 1, the positioning groove 6 is aligned with the card slot 10 on the fixing plate 9. At this time, the card block 8 pops out under the elastic force of the second spring 7 and is inserted into the card slot 10, thereby locking the position of the lifting sleeve 3 and completely exposing the wiring terminals 20 at the bottom of the inverter box 1.

[0039] The operator can conveniently insert the external wires into the wiring slots 19 of the wiring terminals 20 to complete the wiring operation between the photovoltaic module and the inverter.

[0040] After the wiring is completed, the inverter starts to work normally. The radiator 21 and the heat sink 27 inside the inverter housing 1 start to function, conducting the heat generated inside to the outside.

[0041] At the same time, the heat conducting plates 25 on the front and rear end surfaces of the lifting sleeve 3 will also conduct part of the heat in the inverter box 1, and the heat will be further dissipated to the surrounding environment through the heat dissipation fins 26 on the heat conducting plates 25 to assist in heat dissipation.

[0042] When the inverter needs to be maintained and inspected, the buttons 12 on both sides are first pressed. The buttons 12 push the top plate 11, and the top plate 11 pushes the block 8 out of the slot 10 to release the limit of the block 8; the first spring 5 is quickly reset to drive the lifting sleeve 3 to descend, so that the terminal 20 is protected by the lifting sleeve 3 again to prevent dust from entering the wiring part during the maintenance operation.

[0043] The operator can conveniently inspect, clean or repair the radiator 21, control panel 24 and other components inside the inverter box 1 to ensure the normal operation of the inverter.

[0044] In desert areas, severe weather such as sandstorms often occur. When a sandstorm strikes, the lifting sleeve 3 can play a good protective role regardless of whether the inverter is in normal operation or maintenance.

[0045] When in normal operation, even if dust flies, due to the protection of the lifting sleeve 3, most of the dust cannot enter the wiring slot 19 of the wiring terminal 20, thereby ensuring the stability of the wiring part and preventing short circuit or poor contact caused by dust.

[0046] When in maintenance mode and the maintenance operation cannot be completed temporarily, the lifting cover 3 can be lowered first to protect the terminal block 20. After the bad weather passes, the lifting cover 3 can be raised to continue the maintenance operation, thereby ensuring the safety of the equipment in bad environments.

[0047] Embodiment 2: As shown in the attached Figure 3 and attached Figure 4 As shown: This embodiment is basically the same as the previous embodiment, with the difference that a bottom groove 13 is provided on the bottom surface of the lifting sleeve 3, a rotating plate 14 is rotatably connected to the inner wall of the bottom groove 13, a rotating shaft 1401 is connected between the rotating plate 14 and the bottom groove 13, and a plurality of auxiliary fans 15 are installed in an array on the surface of the rotating plate 14; a wiring terminal 20 is installed on the inner bottom wall of the inverter box 1, and a plurality of wiring grooves 19 are provided on the bottom surface of the wiring terminal 20, and the position of the wiring grooves 19 corresponds to the rotating plate 14; when the lifting sleeve 3 is lowered, the auxiliary fan 15 is lowered, and can cooperate with the radiator 21 to quickly conduct the heat inside the lifting sleeve 3, further improve the heat dissipation effect of the wiring part, and cooperate with the blowing to prevent some sand and dust from floating to the wiring part.

[0048] A side groove 16 is provided on the inner wall of the bottom groove 13, and a third spring 17 is connected to the side groove 16. A top block 18 is connected to one end of the third spring 17. The position of the top block 18 corresponds to the bottom wall of the rotating plate 14, and a chamfered portion 1801 is provided on the side wall of the top block 18. By arranging the third spring 17 to cooperate with the top block 18, when the lifting sleeve 3 is lowered, the third spring 17 is reset to pop out the top block 18, and the top block 18 allows the rotating plate 14 to be set at a certain inclination angle, thereby stabilizing the heat dissipation operation at the wiring slot 19.

[0049] As can be seen from the above, in some cases where the ambient temperature is high or heat dissipation needs to be enhanced, the rotating plate 14 in the bottom groove 13 of the bottom surface of the lifting sleeve 3 and the auxiliary fan 15 thereon will play an additional role.

[0050] When the lifting sleeve 3 is lowered, the third spring 17 ejects the top block 18, and the chamfered portion 1801 of the top block 18 causes the rotating plate 14 to rotate around the rotating shaft 1401, the rotating plate 14 is inclined at a certain angle, and the auxiliary fan 15 is in a suitable working position.

[0051] The auxiliary fan 15 starts to rotate. On the one hand, it can cooperate with the radiator 21 to further accelerate the heat conduction in the internal space surrounded by the lifting sleeve 3 and improve the heat dissipation effect; on the other hand, the airflow generated by the auxiliary fan 15 can block part of the sand and dust from drifting to the wiring slot 19 of the wiring terminal 20, providing additional protection for the wiring part.

[0052] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0053] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0057] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic inverter protection device, characterized in that: include: An inverter box (1), wherein both side walls of the inverter box (1) are fixed with limit seats (2); A protective component, comprising a lifting sleeve (3), a first spring (5), a second spring (7), a clamping block (8), a fixing plate (9), a top plate (11) and a heat conducting plate (25); the lifting sleeve (3) is slidably mounted on the circumference of the inverter box (1); both inner walls of the lifting sleeve (3) are provided with stretching grooves (4); the limit seat (2) slides in the stretching grooves (4); the first spring (5) is connected between the top wall of the stretching groove (4) and the upper surface of the limit seat (2); a positioning groove (6) is provided on the side wall of the limit seat (2); the second spring (7) is connected in the positioning groove (6); one end of the second spring (7) is connected to the clamping block (8); the fixing plate (9) is fixed to the side wall of the lifting sleeve (3); a clamping groove (10) is penetrated through the inner wall of the fixing plate (9); the clamping block (8) is engaged with the clamping groove (10); The top plate (11) slides in the slot (10), and a button (12) is connected to the side wall of the top plate (11); the heat conducting plate (25) is symmetrically installed at the front and rear end surfaces of the lifting sleeve (3).

2. A photovoltaic inverter protection device as claimed in claim 1, characterized in that: The card block (8) is a wedge-shaped plate structure, the top plate (11) is located corresponding to the card block (8), a through hole is passed through the side wall of the card slot (10), and the button (12) passes through the through hole.

3. A photovoltaic inverter protection device as claimed in claim 2, characterized in that: The bottom surface of the lifting sleeve (3) is provided with a bottom groove (13), the inner wall of the bottom groove (13) is rotatably connected with a rotating plate (14), a rotating shaft (1401) is connected between the rotating plate (14) and the bottom groove (13), and a plurality of auxiliary fans (15) are installed in an array on the surface of the rotating plate (14).

4. A photovoltaic inverter protection device as claimed in claim 3, characterized in that: The inner wall of the bottom groove (13) is provided with a side groove (16), a third spring (17) is connected inside the side groove (16), one end of the third spring (17) is connected to a top block (18), the position of the top block (18) corresponds to the bottom wall of the rotating plate (14), and the side wall of the top block (18) is provided with a chamfered portion (1801).

5. A photovoltaic inverter protection device as claimed in claim 1, characterized in that: A plurality of heat dissipation fins (26) are arranged in an array on the surface of the heat conducting plate (25).

6. A photovoltaic inverter protection device as claimed in claim 4, characterized in that: A wiring terminal (20) is installed on the inner bottom wall of the inverter box (1), and a plurality of wiring slots (19) are provided on the bottom surface of the wiring terminal (20), wherein the position of the wiring slots (19) corresponds to the rotating plate (14).

7. A photovoltaic inverter protection device as claimed in claim 1, characterized in that: A radiator (21) and a heat sink (27) are installed inside the inverter housing (1), and a control panel (24) is installed on the front end surface of the inverter housing (1).

8. A photovoltaic inverter protection device as claimed in claim 1, characterized in that: A hanging plate (22) is fixedly connected to the upper surface of the inverter box (1), and a plurality of mounting holes (23) are penetrated through the hanging plate (22).

Images