Melt for full-range protection and fuse

Abstract

The utility model discloses a melt for full-range protection and a fuse. The melt is characterized in that two ends of a base part are respectively connected with inclined parts; at least one inclined part is a first fusing part, the first fusing part comprises a plurality of first through holes distributed in the first direction, a first narrow diameter is formed between every two adjacent first through holes, each first narrow diameter comprises a uniform-section area, and the sectional areas of all the parts of the uniform-section area are equal; the ends, away from the base part, of the two inclined parts are each connected with at least one second fusing part, each second fusing part comprises a plurality of second through holes distributed in the first direction, and a second narrow diameter is formed between every two adjacent second through holes; the first direction and the second direction are perpendicular to each other; the base part is provided with a first metal layer, and the melting point of the first metal layer is lower than that of the base part; through differential arrangement of the first narrow diameter and the second narrow diameter, the first narrow diameter and the second narrow diameter are matched to form a full-range protection effect, namely, low-multiple overload protection and normal overload protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electricity, in particular to a melt for full-range protection and a fuse. Background Art

[0002] A fuse is a circuit protection device that when the current exceeds a specified value, melts the melt by the heat generated by itself within a certain time range to disconnect the circuit. The melt is one of the components inside the fuse. By connecting multiple melts in parallel and then filling an insulating medium in the fuse housing, a fuse is formed.

[0003] In the existing gPV full-range protection fuses in the industry, the reliability of low-multiple overload protection is not high. There is an urgent need for a melt structure that can achieve reliable protection for rated breaking short circuits while also achieving reliable protection for low-multiple overloads. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is how to achieve gPV full-range protection. For this purpose, a melt for full-range protection includes:

[0005] A base, with inclined parts respectively connected to both ends of the base; at least one inclined part is a first fusing part, the first fusing part includes a plurality of first through holes arranged along a first direction, a first narrow diameter is formed between two adjacent first through holes, the first narrow diameter includes an equal cross-section area region, and the cross-sectional areas of each part in the equal cross-section area region are all equal;

[0006] At least one second fusing part is respectively connected to the ends of the two inclined parts far away from the base, the second fusing part includes a plurality of second through holes arranged along the first direction, and a second narrow diameter is formed between two adjacent second through holes;

[0007] The base has a first metal layer, and the melting point of the first metal layer is lower than that of the base.

[0008] The size of the equal cross-section area region in the first direction is D1, the minimum size of the second narrow diameter in the first direction is D2, D1 = nD2, and n is not less than 1.

[0009] The sum of D1 of all the equal cross-section area regions is S1, the sum of D2 of all the second narrow diameters is S2, and S1 = S2.

[0010] The size of the equal cross-section area region in the second direction is 1 - 8 mm.

[0011] The first narrow diameter includes a connection region, the first end of the connection region is connected to the equal cross-section area region, the second end of the connection region is far away from the equal cross-section area region, and the cross-sectional area of the connection region gradually increases from the first end to the second end;

[0012] Alternatively, the first narrow diameter includes a connection region. The first end of the connection region is connected to the constant cross-section region, and the second end of the connection region is away from the constant cross-section region. The cross-sectional area of the connection region gradually decreases from the first end to the second end.

[0013] The number of the second fusing parts is at least four. Each of the inclined parts has at least two second fusing parts at one end away from the base part; two adjacent second fusing parts are connected by a second bending part; the base part and the two inclined parts form a part of the first bending part.

[0014] The bending angle of the second bending part is smaller than that of the first bending part.

[0015] The depth dimension H of the first bending part in the third direction is greater than the depth dimension h of the second bending part in the third direction; the third direction is perpendicular to both the first direction and the second direction.

[0016] The second bending part is V-shaped or U-shaped or an inverted trapezoid.

[0017] Therefore, the technical problem to be solved by the present utility model lies in how to achieve the full-range protection of gPV. For this purpose, a fuse includes at least one of the above-mentioned melts.

[0018] The technical solution of the present utility model has the following advantages:

[0019] 1. For the melt for full-range protection provided by the present utility model, the first metal layer is a low melting point region. When a fault occurs in the entire electrical circuit, the first metal layer will heat up first, then affect the base part, and continue to affect the periphery of the base part, such as affecting the inclined part; the cooperative setting of the inclined part and the constant cross-section region forms an arc absorption and anti-arc effect, which can increase the arc voltage on the inclined part; through the differential setting of the first narrow diameter and the second narrow diameter, the two cooperate to form a full-range protection effect, that is, it has low multiple overload protection and normal overload protection; this structure changes the structure of the existing melt and meets the full-range protection effect.

[0020] 2. For the melt for full-range protection provided by the present utility model, the limitation of D1 and D2 improves the differential setting of the first narrow diameter and the second narrow diameter, and better meets the full-range protection effect.

[0021] 3. For the melt for full-range protection provided by the present utility model, the limitation of the total width improves the stability of the current flowing through under normal conditions. In addition, S1 can also be greater than S2, or S1 can be less than S2.

[0022] 4. The melt for full - range protection provided by the present utility model. The setting of the two bending parts increases the length of the whole melt and can also prevent electric leakage between adjacent melts and so on. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 FIG. is a schematic structural view of a melt for full - range protection provided by the present utility model;

[0025] Figure 2 FIG. is a front view of a melt for full - range protection provided by the present utility model;

[0026] Figure 3 is Figure 2 a partial enlarged view of part A in

[0027] Figure 4 FIG. is a side view of a melt for full - range protection provided by the present utility model;

[0028] Figure 5 FIG. is a schematic structural view of another form of a melt for full - range protection provided by the present utility model.

[0029] DESCRIPTION OF THE REFERENCE NUMERALS:

[0030] 11, base; 12, inclined part; 13, first fusing part; 14, second fusing part; 15, first bending part; 16, second bending part; 131, first through - hole; 132, first narrow diameter; 141, second through - hole; 142, second narrow diameter; 1321, equal - cross - section area; 1322, connection area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions of the present utility model with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] Embodiment 1

[0036] This embodiment provides a melt for full-range protection, as shown in the attached Figures 1-4 figure, including:

[0037] A base 11, with inclined parts 12 connected to both ends of the base 11 respectively. In this embodiment, when viewed from the overall front view, the base 11 is in a cuboid structure, and the inclined parts 12 are connected to the left end and the right end of the base 11 respectively. When the base 11 is on a horizontal plane, the inclined part 12 can be inclined upward or the inclined part 12 can be inclined downward. At least one inclined part 12 is a first fusing part 13. In this embodiment, the case where both inclined parts 12 are first fusing parts 13 is taken as an example for description. Since the structures of the two first fusing parts 13 are the same, only the structure of one of the first fusing parts 13 is described in this embodiment. The first fusing part 13 includes a plurality of first through holes 131 arranged along a first direction. In this implementation, the first direction is taken as the Y-axis direction, that is, the width direction of the melt. Those skilled in the art can adjust the arrangement direction of the first through holes 131 according to actual needs. A first narrow diameter 132 is formed between two adjacent first through holes 131. The first narrow diameter 132 includes an equal cross-section area region 1321, and the cross-sectional areas at all parts of the equal cross-section area region 1321 are equal.

[0038] At one end of the two inclined parts 12 away from the base part 11, at least one second fusing part 14 is respectively connected. Taking two second fusing parts 14 as an example, one second fusing part 14 is connected to the inclined part 12 at the left end, and the other second fusing part 14 is connected to the inclined part 12 at the right end. The second fusing part 14 includes a plurality of second through holes 141 arranged along the first direction, and the arrangement direction of the second through holes 141 is the same as that of the first through holes 131. Here, the number of the second through holes 141 can be adjusted according to actual requirements. A second narrow diameter 142 is formed between two adjacent second through holes 141. In the second direction, they are arranged in sequence as the second fusing part 14 at the left end, the first fusing part 13 at the left end, the base part 11, the first fusing part 13 at the right end, and the second fusing part 14 at the right end. The first direction and the second direction are two mutually perpendicular directions. In this embodiment, taking the Y-axis direction as the first direction and the X-axis direction as the second direction as an example, the first direction and the second direction are two mutually perpendicular directions. Here, the X-axis direction is specifically the length direction of the melt. It should be noted that the direction of the current flowing through the melt is the second direction, that is, the current flows along the X-axis direction. In this embodiment, the first direction and the second direction can be swapped, and those skilled in the art can adjust according to actual requirements.

[0039] The base part 11 has a first metal layer, and the melting point of the first metal layer is lower than that of the base part 11. In this embodiment, the materials of the base part 11, the inclined parts 12, the first fusing part 13, and the second fusing part 14 are all the same. For example, it can be copper alloy, silver alloy, copper, silver, etc. These materials are all common melt materials. Here, the first metal layer is coated on the base part 11. It can either completely coat the surface of the base part 11 or only coat a part (such as near the first fusing part 13). Here, the first metal layer can adopt tin, and it is coated on the base part 11 by using the tinning process. Here, the fusing of the first fusing part 13 can be accelerated through the metallurgical effect. Of course, taking tin as the material of the first metal layer here is just an example. Actually, as long as the material can achieve the metallurgical effect (accelerating the first fusing part 13) is acceptable.

[0040] The first metal layer is a low melting point area. When a fault occurs in the entire electrical circuit, the first metal layer will heat up first, then affect the base part 11, and continue to affect the periphery of the base part 11, such as affecting the inclined part 12; the cooperative setting of the inclined part 12 and the equal cross-section area 1321 forms an arc absorption and anti-arc-chute effect, which can increase the arc voltage on the inclined part 12; through the differential setting of the first narrow diameter 132 and the second narrow diameter 142, the two cooperate to form a full-range protection effect, that is, it has low multiple overload protection and normal overload protection; this structure changes the structure of the existing melt and meets the full-range protection effect.

[0041] Specifically, the size of the constant cross-section area 1321 in the first direction is D1, and the minimum size of the second narrow diameter 142 in the first direction is D2. Here, the first direction is the Y-axis direction of the melt, which is the width. D1 = nD2, where n is not less than 1. n can be 1, or n can be greater than 1. Those skilled in the art can adjust the value of n according to actual needs.

[0042] Specifically, the sum of D1 of all the constant cross-section areas 1321 is S1. For example, the size of the constant cross-section area 1321 at the uppermost position in the first direction is D1 1 , and the size of the constant cross-section area 1321 below in the first direction is D1 2 , until the size of the constant cross-section area 1321 at the lowermost position in the first direction is D1 n , so S1 = D1 1 + D1 2 + ··· + D1 n . It can also be considered that S1 is the width of the melt minus the widths of all the first through-holes 131, that is, the total width of the areas where current can flow through on one cross-section. The sum of D2 of all the second narrow diameters 142 is S2. For example, the size of the constant cross-section area 1321 at the uppermost position in the first direction is D2 1 , and the size of the constant cross-section area 1321 below in the first direction is D2 2 , until the size of the constant cross-section area 1321 at the lowermost position in the first direction is D2 n , so S2 = D2 1 + D2 2 + ··· + D2 n . It can also be considered that S2 is the width of the melt minus the widths of all the second through-holes 141, that is, the total width of the areas where current can flow through on one cross-section. S1 = S2. The definitions of S1 and S2 improve the stability of the flowing current under normal circumstances. In addition, S1 can also be greater than S2, or S1 can be less than S2.

[0043] Specifically, the size of the constant cross-section area 1321 in the second direction is 1 - 8 mm. The second direction is the X-axis direction, and the length here can be adjusted according to actual needs.

[0044] Specifically, the size of the first through-hole 131 is larger than the size of the second through-hole 141.

[0045] Specifically, an isosectional area 1321 is formed between two adjacent first through holes 131. Therefore, the upper and lower side walls of the first through hole 131 need to be flat. In this embodiment, the first through hole 131 can be a kidney-shaped hole, a runway-shaped hole, a long strip-shaped hole, a regular hexagon hole, etc. The second through hole 141 can be any shape, such as a square, a circle, an ellipse, etc. Here, the shape of the second narrow diameter 142 is adjusted according to the specific shape of the second through hole 141. When the second through hole 141 is circular, the second narrow diameter 142 between two adjacent second through holes 141 has a structure with larger ends and a smaller middle, that is, the cross-sectional area gradually decreases towards the central position. When the second through hole 141 is square, the second narrow diameter 142 forms a long strip structure with equal cross-sectional areas everywhere.

[0046] Specifically, the first narrow diameter 132 includes a connecting area. The first end of the connecting area is connected to the isosectional area 1321, and the second end of the connecting area is far from the isosectional area 1321. From the first end to the second end of the connecting area, the cross-sectional area gradually increases.

[0047] Or, the first narrow diameter 132 includes a connecting area 1322. The first end of the connecting area 1322 is connected to the isosectional area 1321, and the second end of the connecting area 1322 is far from the isosectional area 1321. From the first end to the second end of the connecting area 1322, the cross-sectional area gradually decreases.

[0048] Specifically, the first through holes 131 can be equally spaced, or the corresponding spacing can be adjusted according to actual needs. The second through holes 141 can be equally spaced, or the corresponding spacing can be adjusted according to actual needs.

[0049] Specifically, the number of the second fusing parts 14 is at least four. Each inclined part 12 has at least two second fusing parts 14 at the end far from the base part 11. Two adjacent second fusing parts 14 are connected by a second bending part 16. The base part 11 and the two inclined parts 12 form part of the first bending part 15. Here, the base part 11 and the second fusing part 14 are arranged in parallel, and the base part 11 and the two inclined parts 12 form an inverted trapezoid structure. The two bending parts increase the length of the whole melt, and can also prevent the adjacent two melts from getting an electric shock, etc. Moreover, the bending parts can enable the insulating medium to better achieve an insulating isolation effect and prevent the adjacent two melts from causing an arc short circuit.

[0050] Specifically, the bending angle of the second bending part 16 is smaller than the bending angle of the first bending part 15. In this embodiment, the bending angles of the first bending part 15 and the second bending part 16 can be adjusted according to actual needs. The limitation of the bending angle can better achieve the effect of absorbing arcs and increasing the arc voltage.

[0051] Specifically, the depth dimension H of the first bending portion 15 in the third direction is greater than the depth dimension h of the second bending portion 16 in the third direction; the third direction is perpendicular to both the first direction and the second direction. Here, the third direction is taken as the Z-axis for example, so the third direction is perpendicular to both the first direction and the second direction. In this embodiment, the third direction is the thickness direction of the melt.

[0052] Specifically, the second bending portion 16 is V-shaped, U-shaped or inverted trapezoidal. The shape of the second bending portion 16 can be adjusted according to actual needs.

[0053] Specifically, as shown in the Figures 1-4 attachment, the base portion 11 and the first fusing portion 13 are located at the middle position of the entire melt, that is, the first bending portion 15 is located at the middle position of the entire melt. The second fusing portions 14 are arranged at both ends, and adjacent second fusing portions 14 are connected by the second bending portion 16. In addition, the base portion 11 and the first fusing portion 13 are located at the left end or the right end of the entire melt. The base portion 11 and the first fusing portion 13 can be located at any position of the entire melt, and those skilled in the art can adjust according to actual needs. In this embodiment, there can be one first bending portion 15 or multiple first bending portions 15.

[0054] Embodiment 2

[0055] This embodiment provides a melt for full-range protection. As shown in the Figure 5 attachment, the difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, only one inclined portion 12 is the first fusing portion 13, and the other inclined portion 12 is the second fusing portion 14. The second fusing portion 14 includes a plurality of second through holes 141 arranged along the first direction. The first fusing portion 13 can be arranged on one inclined portion 12, and the effect of full-range protection can also be achieved.

[0056] Embodiment 3

[0057] This embodiment provides a fuse, which includes at least one melt. The melts are arranged in parallel between each other. The specific structure of the melt has been described in detail in Embodiments 1 and 2, so it will not be elaborated in this embodiment. Both ends of the melt are electrically connected to the input end and the output end of the fuse respectively, and an insulating medium is filled between adjacent melts.

[0058] Obviously, the above embodiments are only examples given for clear illustration, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creative utility model.

Claims

1. A melt for full-range protection, characterized in that, Comprising: A base (11), with inclined parts (12) connected to both ends of the base (11); at least one of the inclined parts (12) is a first fusing part (13), the first fusing part (13) includes a number of first through-holes (131) arranged along a first direction, a first narrow diameter (132) is formed between two adjacent first through-holes (131), the first narrow diameter (132) includes an equal cross-section area region (1321), and the cross-sectional area of each part of the equal cross-section area region (1321) is equal; At least one second fusing part (14) is connected to each end of the two inclined parts (12) away from the base (11), the second fusing part (14) includes a number of second through-holes (141) arranged along the first direction, and a second narrow diameter (142) is formed between two adjacent second through-holes (141); The base (11) has a first metal layer, and the melting point of the first metal layer is lower than that of the base (11).

2. The melt for full-range protection according to claim 1, characterized in that, The dimension of the equal cross-section area region (1321) in the first direction is D1, the minimum dimension of the second narrow diameter (142) in the first direction is D2, and D1 = nD2, where n is not less than 1.

3. The melt for full-range protection according to claim 2, characterized in that The sum of D1 of all the equal cross-section area regions (1321) is S1, and the sum of D2 of all the second narrow diameters (142) is S2, and S1 = S2.

4. The melt for full-range protection according to claim 1, characterized in that, The dimension of the equal cross-section area region (1321) in the second direction is 1 - 8 mm.

5. The melt for full-range protection according to claim 1, characterized in that, The first narrow diameter (132) includes a connection region (1322), the first end of the connection region (1322) is connected to the equal cross-section area region (1321), the second end of the connection region (1322) is away from the equal cross-section area region (1321), and the cross-sectional area of the connection region (1322) gradually increases from the first end to the second end; Or, the first narrow diameter (132) includes a connection region (1322), the first end of the connection region (1322) is connected to the equal cross-section area region (1321), the second end of the connection region (1322) is away from the equal cross-section area region (1321), and the cross-sectional area of the connection region (1322) gradually decreases from the first end to the second end.

6. The melt for full-range protection according to claim 1, characterized in that, The number of the second fusing parts (14) is at least four, and each inclined part (12) has at least two second fusing parts (14) at the end away from the base (11); two adjacent second fusing parts (14) are connected by a second bending part (16); the base (11) and the two inclined parts (12) form a part of a first bending part (15).

7. The melt for full-range protection according to claim 6, characterized in that, The bending angle of the second bending part (16) is smaller than that of the first bending part (15).

8. The melt for full-range protection according to claim 6, characterized in that, The depth dimension H of the first bending part (15) in the third direction is greater than the depth dimension h of the second bending part (16) in the third direction; the third direction is perpendicular to both the first direction and the second direction.

9. The melt for full-range protection according to claim 6 or 7 or 8, characterized in that, The second bending part (16) is V-shaped or U-shaped or an inverted trapezoid.

10. A fuse, characterized in that, Comprising at least one melt for full-range protection as described in any one of claims 1 - 9.

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