Photovoltaic fuse and accessory thereof

Abstract

The invention relates to the technical field of fuses, in particular to a photovoltaic fuse and accessories thereof.The photovoltaic fuse comprises a shell, a plurality of melts are arranged in the shell in parallel and arranged at intervals in the thickness direction of the shell, a plurality of partition assemblies are further arranged in the shell, the partition assemblies correspond to the melts one to one, and the partition assemblies are connected with the melts in parallel. Each partition assembly comprises a first partition plate and a second partition plate, and the first partition plate and the second partition plate are located on the two sides of each melt in the thickness direction respectively; the length of the first partition plate and the length of the second partition plate extend in the width direction of the melt, and the two ends, in the length direction, of the first partition plate and the two ends, in the length direction, of the second partition plate are connected with the inner wall of the shell. The interior of the housing is filled with quartz sand, and the first partition plate and the second partition plate can enable the quartz sand to be uniformly dispersed outside the melts, thereby preventing the quartz sand from generating large flow in the housing, enabling the interval between two adjacent melts to be changed, and further preventing the service life of the photovoltaic fuse from being affected.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and in particular to a photovoltaic fuse and its accessories. Background Art

[0002] Photovoltaic fuses are key components used to protect circuits in photovoltaic power generation systems. They are mainly used to prevent equipment damage or fire risks caused by faults such as overcurrent and short circuit.

[0003] The photovoltaic fuse mainly includes a shell, in which an arc-extinguishing medium is placed. The arc-extinguishing medium is usually quartz sand, and multiple fuses are arranged in parallel in the quartz sand. Since the quartz sand is not fully filled inside the shell, when the photovoltaic fuse vibrates, the quartz sand flows, which easily causes the distance between the fuses to change, resulting in uneven current distribution on the multiple fuses, which will cause local overload on the fuses and affect the service life of the photovoltaic fuse. Summary of the invention

[0004] Based on this, it is necessary to provide a photovoltaic fuse and its accessories to address the technical problems that currently affect the service life of photovoltaic fuses.

[0005] The above purpose is achieved through the following technical solutions: A photovoltaic fuse comprises a shell, wherein a plurality of fuses are arranged in parallel inside the shell, and the plurality of fuses are arranged at intervals along the thickness direction thereof; a plurality of partition assemblies are also arranged inside the shell, and the partition assemblies correspond to the fuses one by one, and each partition assembly comprises a first partition plate and a second partition plate, and the first partition plate and the second partition plate are respectively located on both sides of each melt along the thickness direction; the lengths of the first partition plate and the second partition plate extend along the width direction of the melt, and both ends of the first partition plate and the second partition plate along the length direction are connected to the inner wall of the shell; the interior of the shell is filled with quartz sand, and the first partition plate and the second partition plate can make the quartz sand evenly dispersed on the outside of each melt.

[0006] Furthermore, along the thickness direction of the melt, heat dissipation channels are formed between the first partition plate and the second partition plate between two adjacent melts, between the first partition plate located at the outermost side of the multiple melts and the inner wall of the outer shell, and between the second partition plate located at the outermost side of the multiple melts and the inner wall of the outer shell, and the outer shell is provided with multiple heat dissipation ports, and the heat dissipation channels correspond to the heat dissipation ports one by one.

[0007] Furthermore, the first partition plate and the second partition plate have the same structure and are arranged opposite to each other. Along the length direction of the melt, the first partition plate and the second partition plate are provided with a plurality of inner limit plates and a plurality of outer limit plates at intervals. The inner limit plates are located on the side of the first partition plate or the second partition plate facing the melt and are arranged in contact with the melt. The outer limit plates are located on the side of the first partition plate or the second partition plate away from the melt, and the outer limit plates are located in the corresponding heat dissipation channels. The inner limit plates and the outer limit plates are arranged correspondingly in the thickness direction of the melt.

[0008] Furthermore, the inner limit plates of the first partition plate and the inner limit plates of the second partition plate are staggered in the length direction of the melt.

[0009] Furthermore, the melt is alternately provided with first sections and second sections at equal intervals along its length direction, and the width of the first section is greater than the width of the second section.

[0010] Furthermore, a plurality of arc-extinguishing grids are provided on the side of the first partition plate and the second partition plate facing the melt, and the arc-extinguishing grids are evenly distributed along the length direction of the melt. The arc-extinguishing grids on the first partition plate and the arc-extinguishing grids on the second partition plate are correspondingly arranged in the thickness direction of the melt, and the arc-extinguishing grids correspond to the second section of the melt.

[0011] Furthermore, the arc extinguishing grid is integrally formed and arranged on the first partition plate and the second partition plate.

[0012] Furthermore, the shell is detachably connected to end plates on both sides along the length direction of the melt, a connecting blade is penetrated through the middle of the end plate, and the multiple pieces of melt are conductively connected to the connecting blade.

[0013] Furthermore, the first partition plate and the second partition plate are fixedly connected to the inner wall of the shell.

[0014] An accessory for a photovoltaic fuse comprises a base, wherein the base is used to install the photovoltaic fuse, wherein the photovoltaic fuse is the photovoltaic fuse described above, and a cooling fan is arranged on the base, wherein the cooling fan is arranged corresponding to the cooling channel.

[0015] The beneficial effects of the present invention are: The photovoltaic fuse and its accessories provided by the present invention, first, by setting a partition assembly outside each fuse, the first partition plate and the second partition plate of the partition assembly surround each fuse inside, so that after the quartz sand is filled into the shell, the quartz sand is evenly dispersed outside each fuse, avoiding the quartz sand from flowing too much in the shell, thereby changing the interval between two adjacent fuses, affecting the distribution of current on the fuse, and further affecting the service life of the photovoltaic fuse. At the same time, each fuse is independently separated and set in each partition assembly, so that physical isolation can be formed between each fuse to avoid magnetic field coupling, thereby avoiding electromagnetic interference between fuses, and thus not easily causing fuse vibration, false melting or distortion of adjacent circuit signals.

[0016] Second, the heat dissipation channel can exchange the heat on the melt with the outside air through the first partition plate and the second partition plate, thereby promoting the heat dissipation of the melt.

[0017] Third, by providing a cooling fan, the cooling fan can blow outside air into the interior of each cooling channel, further improving the cooling efficiency of the photovoltaic fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a photovoltaic fuse provided in one embodiment of the present invention; Figure 2 A schematic top view of a photovoltaic fuse provided by an embodiment of the present invention; Figure 3 for Figure 2 Middle AA section view; Figure 4 for Figure 3 A magnified schematic diagram of the structure at X in the middle; Figure 5 A schematic diagram of the structure of a photovoltaic fuse without a casing provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a housing in a photovoltaic fuse provided in one embodiment of the present invention; Figure 7 A schematic structural diagram of an accessory of a photovoltaic fuse provided in one embodiment of the present invention.

[0019] in: 100, outer shell; 110, first partition plate; 111, inner limit plate; 112, outer limit plate; 113, arc extinguishing grid; 120, second partition plate; 130, heat dissipation channel; 140, mounting plate; 150, heat dissipation port; 200, end plate; 300, screw; 400, connecting blade; 410, melt; 411, second section; 412, first section; 500, base; 510, mounting bracket; 520, cooling fan; 600, sealing gasket. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] 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.

[0023] like Figures 1 to 6 As shown, a photovoltaic fuse provided by an embodiment of the present invention includes a housing 100, wherein a plurality of fuses 410 are arranged in parallel inside the housing 100, and the plurality of fuses 410 are arranged at intervals along the thickness direction thereof, and a plurality of partition components are also arranged inside the housing 100, wherein the partition components correspond to the fuses 410 one by one, and each partition component includes a first partition plate 110 and a second partition plate 120, and the first partition plate 110 and the second partition plate 120 are respectively located at the thickness direction (corresponding to each of the fuses 410) of each other. Figure 4 The length of the first partition plate 110 and the second partition plate 120 are along the width direction of the melt 410 (corresponding to Figure 4The first partition plate 110 and the second partition plate 120 extend in a direction perpendicular to the paper surface, and both ends of the length direction are connected to the inner wall of the shell 100; the interior of the shell 100 is filled with quartz sand, and the first partition plate 110 and the second partition plate 120 can evenly disperse the quartz sand outside each melt 410.

[0024] The housing 100 is a ceramic shell, which can meet the requirements of electrical insulation, weather resistance, mechanical strength and fire safety. The melt 410 is made of materials such as silver and copper, and has good electrical conductivity and thermal conductivity. Multiple pieces of melt 410 are arranged in parallel. When multiple pieces of melt 410 are melted at the same time, the arc energy can be dispersed and the arc voltage and temperature can be reduced. Quartz sand can force the arc to extend along a tortuous path, increase the arc length and resistance, and thus have an arc extinguishing effect, and quartz stone can effectively absorb the heat of the arc.

[0025] The photovoltaic fuse of the present invention provides a partition assembly on the outside of each melt 410, and the first partition plate 110 and the second partition plate 120 of the partition assembly surround each melt 410 therein, so that after the quartz sand is filled into the interior of the outer shell 100, the quartz sand is evenly dispersed on the outside of each melt 410, avoiding a large flow of the quartz sand in the outer shell 100, thereby changing the interval between two adjacent melts 410, affecting the distribution of current on the melt 410, and further affecting the service life of the photovoltaic fuse.

[0026] At the same time, each fuse 410 is independently separated and arranged in each separation component, so that each fuse 410 can be physically isolated to avoid magnetic field coupling, thereby avoiding electromagnetic interference between the fuses 410, and thus not easily causing vibration of the fuse 410, false melting or distortion of adjacent circuit signals.

[0027] Furthermore, along the thickness direction of the melt 410, heat dissipation channels 130 are formed between the first partition plate 110 and the second partition plate 120 located between two adjacent melts 410, between the first partition plate 110 located outside the multiple pieces of melt 410 and the inner wall of the outer shell 100, and between the second partition plate 120 located outside the multiple pieces of melt 410 and the inner wall of the outer shell 100. The outer shell 100 is provided with heat dissipation ports 150, and the heat dissipation channels 130 correspond one-to-one to the heat dissipation ports 150.

[0028] In this way, the heat dissipation channel 130 can exchange heat on the melt 410 with the outside air through the first partition plate 110 and the second partition plate 120 , thereby accelerating the heat dissipation of the melt 410 .

[0029] Furthermore, the first partition plate 110 and the second partition plate 120 have the same structure and are arranged opposite to each other, along the length direction of the melt 410 (corresponding to Figure 4In the upper and lower directions), the first partition plate 110 and the second partition plate 120 are provided with a plurality of inner limit plates 111 and a plurality of outer limit plates 112, the inner limit plates 111 are located on the side of the first partition plate 110 or the second partition plate 120 facing the melt 410 and are provided in contact with the melt 410, the outer limit plates 112 are located on the side of the first partition plate 110 or the second partition plate 120 away from the melt 410, and the outer limit plates 112 are located in the respective corresponding heat dissipation channels 130, and the inner limit plates 111 and the outer limit plates 112 are provided correspondingly in the thickness direction of the melt 410.

[0030] Specifically, the outer limiting plate 112 of the first partition plate 110 is located in the heat dissipation channel 130 formed by the first partition plate 110 and the second partition plate 120 and the first partition plate 110 and the inner wall of the housing 100 .

[0031] The outer limiting plate 112 of the second partition plate 120 is located in the heat dissipation channel 130 formed by the first partition plate 110 and the second partition plate 120 and the second partition plate 120 and the inner wall of the housing 100 .

[0032] In this embodiment, the melt 410 is provided with four pieces, the partition assembly is provided with four groups, and the heat dissipation channels 130 are provided with five pieces. The inner limit plate 111 supports the melt 410 to prevent the melt 410 from shifting. At the same time, the inner limit plate 111 can evenly separate the quartz sand in the length direction of the melt 410 to further prevent the flow of the quartz sand. The outer limit plate 112 can increase the heat dissipation area of ​​the heat dissipation channel 130 and improve the heat dissipation performance.

[0033] Furthermore, the inner limiting plates 111 of the first partition plate 110 and the inner limiting plates 111 of the second partition plate 120 are staggered in the length direction of the melt 410. This prevents the inner limiting plates 111 of the first partition plate 110 and the inner limiting plates 111 of the second partition plate 120 from squeezing the melt 410 and causing its deformation.

[0034] Furthermore, the melt 410 includes a first section 412 and a second section 411, and the first section 412 and the second section 411 are alternately distributed along the length direction of the melt 410, and the width of the first section 412 is greater than the width of the second section 411. A pentagonal or hexagonal hole is provided on the second section 411. In this way, the second section 411 is a narrow section, and the plurality of narrow sections divide the melt 410 into a plurality of small resistance areas. When the current is overloaded, the narrow section is heated and melted first due to the concentrated resistance, ensuring the operation under the precise current / time curve.

[0035] Furthermore, a plurality of arc extinguishing grids 113 are provided on the side of the first partition plate 110 and the second partition plate 120 facing the melt 410, and the arc extinguishing grids 113 are evenly distributed along the length direction of the melt 410. The arc extinguishing grids 113 on the first partition plate 110 and the arc extinguishing grids 113 on the second partition plate 120 are correspondingly arranged in the thickness direction of the melt 410, and the arc extinguishing grids 113 correspond to the second section 411 of the melt 410. The inner limit plate 111 of the first partition plate 110 and the inner limit plate 111 of the second partition plate 120 both correspond to the first section 412 of the melt 410. Since the second section 411 of the melt 410 is narrower and easier to melt, the arc extinguishing grids 113 corresponding to the second section 411 can improve the arc extinguishing efficiency and arc extinguishing effect.

[0036] Furthermore, the arc extinguishing grid 113 is integrally formed and arranged on the first partition plate 110 and the second partition plate 120. The arc extinguishing grid 113, the first partition plate 110 and the second partition plate 120 are all made of ceramic materials, and the integral forming is convenient for processing.

[0037] Furthermore, the housing 100 is detachably connected to the end plate 200 on both sides along the length direction of the melt 410 by screws 300, and a connecting blade 400 is penetrated in the middle of the end plate 200, and the multiple melts 410 are conductively connected to the connecting blade 400. The side of the end plate 200 facing the inside of the housing 100 is detachably connected to the sealing gasket 600 by screws 300, and the sealing gasket 600 is used to seal the gap between the housing 100 and the end plate 200. A limiting plate is also provided on the side of the sealing gasket 600 facing the inside of the housing 100, and the limiting plate is detachably connected to the end plate 200 by screws 300, and the limiting plate is used to limit the connecting blade 400 and the melt 410 so that the two are tightly connected.

[0038] Furthermore, the first partition plate 110 and the second partition plate 120 are fixedly connected to the inner wall of the housing 100. The fixed connection facilitates improving the arc extinguishing effect, and the first partition plate 110 and the second partition plate 120 can be processed during processing, and then the first partition plate 110 and the second partition plate 120 are fixedly connected to the housing 100.

[0039] like Figure 1 and Figure 7 As shown, an accessory of a photovoltaic fuse provided by an embodiment of the present invention includes a base 500, the base 500 is used to install a photovoltaic fuse, the photovoltaic fuse is the photovoltaic fuse in the above embodiment, and a heat dissipation fan 520 is provided on the base 500, and the heat dissipation fan 520 is arranged corresponding to the heat dissipation channel 130. Specifically, each end plate 200 of the photovoltaic fuse is provided with a mounting plate 140, and two mounting brackets 510 are provided on the base 500. After the mounting plate 140 is fixedly arranged on the mounting bracket 510, the heat dissipation fan 520 corresponds to the heat dissipation channel 130.

[0040] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows: The photovoltaic fuse is mounted on the base 500, and the cooling fan 520 is turned on, and the cooling fan 520 blows outside air into the interior of each cooling channel 130. When the fuse 410 is blown due to current overload, the generated arc is dispersed by the arc extinguishing grid 113 and the quartz sand inside the housing 100, and the heat is transferred to the housing 100 through the quartz sand, the first partition plate 110, and the second partition plate 120. The flow of air in the cooling channel 130 promotes the heat dissipation of the first partition plate 110, the second partition plate 120 and the housing 100, thereby improving the heat dissipation efficiency of the photovoltaic fuse.

[0041] The cooling fan 520 may also be turned on after the fuse 410 is melted.

[0042] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A photovoltaic fuse, characterized in that: It includes an outer shell, wherein a plurality of melts are arranged in parallel inside the outer shell, and the plurality of melts are arranged at intervals along the thickness direction thereof. A plurality of partition components are also arranged inside the outer shell, and the partition components correspond to the melts one by one, and each partition component includes a first partition plate and a second partition plate, and the first partition plate and the second partition plate are respectively located on both sides of each melt along the thickness direction; the lengths of the first partition plate and the second partition plate extend along the width direction of the melt, and both ends of the first partition plate and the second partition plate along the length direction are connected to the inner wall of the outer shell; the interior of the outer shell is filled with quartz sand, and the first partition plate and the second partition plate can make the quartz sand evenly dispersed on the outside of each melt.

2. The photovoltaic fuse according to claim 1, characterized in that: Along the thickness direction of the melt, heat dissipation channels are formed between the first partition plate and the second partition plate between two adjacent melts, between the first partition plate located at the outermost side of the multiple melts and the inner wall of the shell, and between the second partition plate located at the outermost side of the multiple melts and the inner wall of the shell. The shell is provided with multiple heat dissipation ports, and the heat dissipation channels correspond to the heat dissipation ports one by one.

3. The photovoltaic fuse according to claim 2, characterized in that: The first partition plate and the second partition plate have the same structure and are arranged opposite to each other. Along the length direction of the melt, the first partition plate and the second partition plate are provided with a plurality of inner limit plates and a plurality of outer limit plates at intervals. The inner limit plates are located on the side of the first partition plate or the second partition plate facing the melt and are arranged in contact with the melt. The outer limit plates are located on the side of the first partition plate or the second partition plate away from the melt, and the outer limit plates are located in the corresponding heat dissipation channels. The inner limit plates and the outer limit plates are arranged correspondingly in the thickness direction of the melt.

4. The photovoltaic fuse according to claim 3, characterized in that: The inner limiting plates of the first partition plate and the inner limiting plates of the second partition plate are staggeredly distributed in the length direction of the melt.

5. The photovoltaic fuse according to claim 3 or 4, characterized in that: The melt comprises a first section and a second section, wherein the first section and the second section are alternately distributed along the length direction of the melt, and the width of the first section is greater than the width of the second section.

6. The photovoltaic fuse according to claim 5, characterized in that: A plurality of arc extinguishing grids are provided on the side of the first partition plate and the second partition plate facing the melt, and the arc extinguishing grids are evenly distributed along the length direction of the melt. The arc extinguishing grids on the first partition plate and the arc extinguishing grids on the second partition plate are correspondingly arranged in the thickness direction of the melt, and the arc extinguishing grids correspond to the second section of the melt.

7. The photovoltaic fuse according to claim 6, characterized in that: The arc extinguishing grid is integrally formed and arranged on the first partition plate and the second partition plate.

8. The photovoltaic fuse according to claim 1, characterized in that: The shell is detachably connected with end plates on both sides along the length direction of the melt, and a connecting blade is penetrated through the middle of the end plate, and the multiple pieces of melt are conductively connected with the connecting blade.

9. The photovoltaic fuse according to claim 1, characterized in that: The first partition plate and the second partition plate are fixedly connected to the inner wall of the shell.

10. An accessory for a photovoltaic fuse, characterized in that: It comprises a base, the base is used to install a photovoltaic fuse, the photovoltaic fuse is the photovoltaic fuse according to any one of claims 2-9, a cooling fan is arranged on the base, and the cooling fan is arranged corresponding to the cooling channel.

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