A melt, a fuse and an electric device

Abstract

The utility model discloses a kind of melt, fuse and electric device, for solving the technical problem that existing melt fusing breaking capacity is poor, cannot play effective technical problem of protecting electric device.The melt of the utility model specifically includes integrally formed and the first conductive matrix and the second conductive matrix of same width, wherein, the opposite ends of the first conductive matrix are connected with the second conductive matrix, at least one column of first row holes extending along the width direction of the first conductive matrix is arranged on the first conductive matrix, the first row hole has a plurality of first holes arranged at intervals, and first narrow diameter part is formed between adjacent two first holes;Second row hole extending along the width direction of the second conductive matrix is arranged on the second conductive matrix, the second row hole has a plurality of second holes arranged at intervals, and second narrow diameter part is formed between adjacent two second holes;Wherein, the aperture of the second hole is smaller than the aperture of the first hole.

Description

Technical Field

[0001] This utility model relates to the field of electronic component design technology, and in particular to a fusible element, a fuse, and an electrical device. Background Technology

[0002] With the increasing global demand for renewable energy, photovoltaic (PV) power generation, as a clean and renewable energy source, is being used more and more widely. However, during operation, PV power generation systems may experience excessive current due to various reasons (such as short circuits and overloads), which can damage the system. Therefore, in PV power generation systems, fuses are an important protective device, and their performance directly affects the safe operation of the system.

[0003] Most fuses consist of a housing and a fusible element. In use, the fuse is connected in series in the circuit being protected. When the current in the protected circuit exceeds a specified value, and after a certain period of time, the heat generated by the fusible element melts it, breaking the circuit and thus providing protection.

[0004] In existing melt designs, multiple rows of holes are typically arranged on a conductive substrate. Each row consists of multiple holes spaced equally along the width of the conductive substrate, with narrow sections formed between adjacent holes. Because the melt design uses only holes of a single size and with small diameters, each row of holes contains a large number of narrow sections. When a small overload current flows through the melt, the heat generated by the small overload current is quickly dispersed by the multiple narrow sections, resulting in a longer melting time. This leads to a low reliability of the melt when interrupting small overload currents, making it unable to effectively protect electrical devices.

[0005] Therefore, finding a technical solution that can solve the above-mentioned technical problems has become an important research topic for those skilled in the art. Utility Model Content

[0006] This utility model discloses a fusible element, a fuse, and an electrical device to solve the technical problem that existing fusible elements have poor breaking capacity and cannot effectively protect the electrical device.

[0007] The present invention provides a melt comprising an integrally formed first conductive substrate and a second conductive substrate of the same width, wherein the opposite ends of the first conductive substrate are connected to the second conductive substrate, and the first conductive substrate is provided with at least one row of first holes extending along its width direction, the first row of holes having a plurality of spaced first holes, and a first narrow diameter portion being formed between two adjacent first holes.

[0008] The second conductive substrate is provided with a plurality of rows of second holes extending along its width direction, the second row of holes having a plurality of spaced second holes, and a second narrow diameter portion being formed between two adjacent second holes;

[0009] The diameter of the second hole is smaller than that of the first hole.

[0010] Optionally, a protrusion is provided between two adjacent columns of the second row of holes.

[0011] Optionally, the protrusion includes a first plate portion and a second plate portion;

[0012] The first plate portion and the second plate portion are connected at a preset angle to form the protrusion that protrudes outward from the first conductive substrate.

[0013] Optionally, the first conductive substrate and the second conductive substrate are made of silver or copper-silver composite strips.

[0014] The present invention provides a fuse, comprising a housing, a first end plate, a second end plate, a first terminal, a second terminal, and the aforementioned fusible element;

[0015] The housing has a first port and a second port that are disposed opposite to each other. The first end plate is connected to the first port, and the second end plate is connected to the second port. The housing, the first end plate, and the second end plate form a receiving space, and the melt is located within the receiving space.

[0016] The first terminal passes through the first end plate and is connected to one end of the melt, and the second terminal passes through the second end plate and is connected to the other end of the melt.

[0017] Optionally, the accommodating space is also filled with arc-quenching material.

[0018] Optionally, the arc-quenching material is quartz sand.

[0019] Optionally, the housing may also include an indicator disposed on the outside of the housing and connected to the first end plate and the second end plate.

[0020] Optionally, the first terminal is a fork-shaped contact, and the second terminal is a hook-shaped contact.

[0021] The present invention provides an electrical device including the aforementioned fuse.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the melt of this invention, the two ends of the first conductive substrate are connected to the second conductive substrate. The first conductive substrate is provided with at least one row of first holes extending along its width direction. The first row of holes has a plurality of spaced first holes, and a first narrow section is formed between two adjacent first holes. The second conductive substrate is provided with a plurality of rows of second holes extending along its width direction. The second row of holes has a plurality of spaced second holes, and a second narrow section is formed between two adjacent second holes. The diameter of the second hole is smaller than the diameter of the first hole.

[0024] Through the above design, in the first and second conductive substrates of equal width, since the diameter of the first hole in the first row of holes is larger than the diameter of the second hole in the second row of holes, and the number of the first narrow section is less than the number of the second narrow section, when a small overload current flows through the melt, because the number of the first narrow section is smaller, the heat generated by the small overload current in the first narrow section cannot be quickly dispersed. Under the condition of heat accumulation, the first narrow section will melt quickly, thereby improving the reliability of the melt when breaking small overload current, effectively enhancing the breaking capacity of the melt, and playing the role of effectively protecting electrical devices. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of a melt provided by this utility model;

[0027] Figure 2 This is a schematic diagram of another angle of the structure of a melt provided by this utility model;

[0028] Figure 3 A schematic diagram of the structure of a fuse provided by this utility model;

[0029] Figure 4 A cross-sectional structural diagram of a fuse provided by this utility model;

[0030] Illustration: Melt 1; First conductive substrate 101; Second conductive substrate 102; First hole 103; Second hole 104; First narrow section 105; Second narrow section 106; Protrusion 107; First plate section 1071; Second plate section 1072; Housing 2; First end plate 3; Second end plate 4; First terminal 5; Second terminal 6; Indicator 7. Detailed Implementation

[0031] This utility model discloses a fusible element, a fuse, and an electrical device to solve the technical problem that existing fusible elements have poor breaking capacity and cannot effectively protect the electrical device.

[0032] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 4 The present invention provides a melt comprising an integrally formed first conductive substrate 101 and a second conductive substrate 102 having the same width, wherein the opposite ends of the first conductive substrate 101 are connected to the second conductive substrate 102, and the first conductive substrate 101 is provided with at least one row of first holes extending along its width direction, the first row of holes having a plurality of spaced first holes 103, and a first narrow diameter portion 105 being formed between two adjacent first holes 103;

[0034] The second conductive substrate 102 is provided with a plurality of rows of second rows of holes extending along its width direction. The second rows of holes have a plurality of spaced second holes 104, and a second narrow diameter portion 106 is formed between two adjacent second holes 104.

[0035] The diameter of the second hole 104 is smaller than the diameter of the first hole 103.

[0036] Through the above design, in the first conductive substrate 101 and the second conductive substrate 102 of equal width, since the diameter of the first hole 103 in the first row of holes is larger than the diameter of the second hole 104 in the second row of holes, and the number of the first narrow diameter portion 105 is less than the number of the second narrow diameter portion 106, when a small overload current flows through the melt 1, since the number of the first narrow diameter portion 105 is small, the heat generated by the small overload current in the first narrow diameter portion 105 cannot be quickly dispersed. Under the condition of heat accumulation, the first narrow diameter portion 105 will melt quickly, thereby improving the reliability of the melt 1 when breaking the small overload current, effectively improving the breaking capacity of the melt 1, and playing the role of effectively protecting the electrical device.

[0037] In addition, when a large overload current flows through the fusible element 1, the first narrow diameter portion 105 and the second narrow diameter portion 106 will melt quickly, ensuring protection for the electrical device.

[0038] Furthermore, in the melt 1 of this embodiment, a protrusion 107 is provided between two adjacent columns of the second row of holes.

[0039] It should be noted that the above design can ensure the structural strength of the entire melt 1 and guarantee the stability of the structure.

[0040] Specifically, the protrusion 107 described above is a triangular structure, which specifically includes a first plate portion 1071 and a second plate portion 1072.

[0041] The first plate portion 1071 and the second plate portion 1072 are inclinedly connected at a preset angle to form the protrusion 107 that protrudes outward from the second conductive substrate 102. The preset angle can be from 90° to 120°, and this embodiment does not limit it.

[0042] It should be noted that, through the above design, in addition to ensuring the structural strength of the melt 1, the inclined connection between the first plate 1071 and the second plate 1072 helps to save space and makes the arcs generated by flowing through the first plate 1071 and the second plate 1072 have different directions, avoiding the possibility of arcs connecting and interfering with each other, and improving the breaking capacity of the melt 1 under high voltage conditions.

[0043] Furthermore, in this embodiment, the first conductive substrate 101 and the second conductive substrate 102 are made of silver or copper-silver composite strips.

[0044] It should be noted that this embodiment does not limit the specific materials of the first conductive substrate 101 and the second conductive substrate 102. Designers can select appropriate materials to manufacture the first conductive substrate 101 and the second conductive substrate 102 according to actual fusing requirements.

[0045] Furthermore, this embodiment does not impose any restrictions on the specific thickness, length, or width of the melt 1; all of the above parameters can be selected according to the fusing grade.

[0046] Please see Figure 1 The present invention provides a fuse comprising a housing 2, a first end plate 3, a second end plate 4, a first terminal 5, a second terminal 6, and the aforementioned fusible element 1;

[0047] The housing 2 has a first port and a second port that are arranged opposite to each other. The first end plate 3 is connected to the first port, and the second end plate 4 is connected to the second port. The housing 2, the first end plate 3, and the second end plate 4 form a receiving space, and the melt 1 is located in the receiving space.

[0048] The first terminal 5 passes through the first end plate 3 and is connected to one end of the melt 1, and the second terminal 6 passes through the second end plate 4 and is connected to the other end of the melt 1.

[0049] It should be noted that, since the above-mentioned fuse has the aforementioned fuse element 1, through the above design, in the first conductive base 101 and the second conductive base 102 of equal width, since the diameter of the first hole 103 in the first row of holes is larger than the diameter of the second hole 104 in the second row of holes, and the number of first narrow diameter portions 105 is less than the number of second narrow diameter portions 106, when a small overload current flows through the fuse element 1, since the number of first narrow diameter portions 105 is small, the heat generated by the small overload current in the first narrow diameter portions 105 cannot be quickly dispersed. Under the condition of heat accumulation, the first narrow diameter portions 105 will melt quickly, thereby improving the reliability of the fuse element 1 when interrupting small overload current, effectively improving the breaking capacity of the fuse element 1, and playing the role of effectively protecting the electrical device.

[0050] Furthermore, the accommodating space in this embodiment is also filled with arc-quenching material.

[0051] It should be noted that, through the above design, when the melt 1 melts due to overload, the arc-extinguishing material can quickly extinguish the arc, ensuring the safety of the electrical device.

[0052] Specifically, the arc-extinguishing material mentioned above is not limited to quartz sand; different arc-extinguishing materials can also be used, and this embodiment does not impose any restrictions on this.

[0053] Furthermore, the fuse in this embodiment also includes an indicator 7, which is disposed on the outside of the housing 2 and connected to the first end plate 3 and the second end plate 4.

[0054] It should be noted that when the fuse element 1 of the fuse blows, the current will conduct to the indicator 7, causing the indicator 7 to display an alarm indication to notify relevant personnel of an overload. The aforementioned indicator 7 is specifically existing technology, and this embodiment will not elaborate on it in detail.

[0055] Furthermore, in this embodiment, the first terminal 5 is a fork-shaped contact, and the second terminal 6 is a hook-shaped contact.

[0056] It should be noted that the structure of the first terminal 5 and the second terminal 6 in this embodiment can be selected according to the specific electrical device, and this embodiment does not impose any restrictions on this.

[0057] Please see Figures 1 to 4 The present invention provides an electrical device including the fuse as described above.

[0058] It should be noted that the aforementioned electrical devices can specifically be photovoltaic systems, etc., and this embodiment does not impose any limitations on this. Through the design of the aforementioned fuse, the photovoltaic system can achieve high breaking capacity, specifically 50kA, effectively responding to short-circuit faults in the photovoltaic system and preventing equipment damage.

[0059] The above provides a detailed description of a fusible element, a fuse, and an electrical device provided by this utility model. For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A melt, characterized in that, The first conductive substrate (101) and the second conductive substrate (102) are integrally formed and have the same width. The two ends of the first conductive substrate (101) are connected to the second conductive substrate (102). The first conductive substrate (101) is provided with at least one row of first holes extending along its width direction. The first row of holes has a plurality of spaced first holes (103). A first narrow diameter portion (105) is formed between two adjacent first holes (103). The second conductive substrate (102) is provided with a plurality of rows of second rows of holes extending along its width direction. The second rows of holes have a plurality of spaced second holes (104), and a second narrow section (106) is formed between two adjacent second holes (104). The diameter of the second hole (104) is smaller than that of the first hole (103).

2. The melt according to claim 1, characterized in that, A protrusion (107) is provided between two adjacent columns of the second row of holes.

3. The melt according to claim 2, characterized in that, The protrusion (107) includes a first plate portion (1071) and a second plate portion (1072). The first plate portion (1071) and the second plate portion (1072) are connected at a preset angle to form the protrusion (107) that protrudes outward from the second conductive substrate (102).

4. The melt according to claim 1, characterized in that, The first conductive substrate (101) and the second conductive substrate (102) are made of silver or copper-silver composite strip.

5. A fuse, characterized in that, It includes a housing (2), a first end plate (3), a second end plate (4), a first terminal (5), a second terminal (6), and a melt (1) as described in any one of claims 1 to 4; The housing (2) has a first port and a second port arranged opposite to each other. The first end plate (3) is connected to the first port, and the second end plate (4) is connected to the second port. The housing (2), the first end plate (3), and the second end plate (4) form a receiving space, and the melt (1) is located in the receiving space. The first terminal (5) passes through the first end plate (3) and is connected to one end of the melt (1), and the second terminal (6) passes through the second end plate (4) and is connected to the other end of the melt (1).

6. The fuse according to claim 5, characterized in that, The containment space is also filled with arc-extinguishing material.

7. The fuse according to claim 6, characterized in that, The arc-extinguishing material is quartz sand.

8. The fuse according to claim 5, characterized in that, It also includes an indicator (7), which is disposed on the outside of the housing (2) and connected to the first end plate (3) and the second end plate (4).

9. The fuse according to claim 5, characterized in that, The first terminal (5) is a fork-shaped contact, and the second terminal (6) is a hook-shaped contact.

10. An electrical device, characterized in that, Includes the fuse as described in any one of claims 5-9.

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