TW202125552A - High-voltage complex thermal fuse - Google Patents

Abstract

A high-voltage complex thermal fuse according to an embodiment of the present invention may comprise: caps for providing a fixing force at the upper and lower sides of a thermal fuse; a fuse unit comprising a flux-containing temperature-sensitive material and a first insulator which is inserted in the upper cap and forms an internal hole in which the temperature-sensitive material is introduced; a connection unit which closely contacts an end portion at one side of the temperature-sensitive material and the outer wall of the first insulator to transmit current to the temperature-sensitive material; and a resistor unit comprising a second insulator of which one side is inserted in the connection unit and the other side is inserted in the lower cap, and a resistor wound along the outer surface of the second insulator.

Description

Composite thermal fuse for high voltage

The present invention relates to a composite thermal fuse for high voltage, and more specifically relates to a fuse device, which can physically cut off the current completely by using the characteristics of a temperature-sensitive substance containing flux (flux) Prevent overheating caused by overcurrent.

Recently, one of the causes of fire caused by the use of charger adapters for various electronic and electrical products is overheating due to overcurrent. In order to prevent fires from overheating caused by overcurrent, a thermal fuse has been developed and used as a method to cut off electricity when high heat above a certain temperature is generated. However, the fact is that due to the technical and structural problems of the previous fuse, the defective rate during the assembly process is high, the production cost of the product is high, and the product reliability problem caused by the misoperation, it cannot fully perform the function as a thermal fuse 100% .

As a step in an attempt to solve this problem, a type of thermal fuse using various technologies has recently been developed, but it has not yet been developed to completely cut off the electricity to meet product reliability when high heat above a certain temperature is generated. Thermal fuse. For example, in the previous thermal fuse, a thermal fuse that uses a temperature-sensitive material that melts due to the generation of high-temperature heat has the following problem: The power is cut off accurately at the temperature desired by the user. Furthermore, there is a half-short circuit problem in which residual current flows even if the power supply is cut off and restarts operation.

In addition, the previous thermal fuse has the following problems: it is not suitable for the production of low-resistance high-voltage products due to its own resistance generated inside the fuse, and at the same time, it cannot meet the allowable error value due to the variation of the resistance value after the product is produced. Technical problems will result in a high defect rate, and there are also many difficulties in production costs and assembly due to the use of various types of parts.

The present invention is proposed in order to solve the above-mentioned problems, and its object is to provide a thermal fuse which can be used with a temperature-sensitive material containing flux and its own internal space for ensuring the melting of the temperature-sensitive material The structure minimizes the misoperation during the current cut-off process that occurred in the previous fuse.

In addition, its purpose is to provide a thermal fuse, which can be produced by welding the overall structure of the fuse into a single body through a seam process, so that the self-resistance generated inside the fuse can be minimized, and Can be used in various product groups.

According to an embodiment of the present invention, a composite thermal fuse for high voltage may include: a cap to provide a fixing force above and below the thermal fuse; a fuse part including a temperature sensitive substance containing flux and a first insulator, the The first insulator is inserted into the upper end cap and forms an inner hole for introducing the temperature-sensitive substance; the connecting portion is closely attached to one end of the temperature-sensitive substance and the outer wall of the first insulator to transfer current to the temperature-sensitive substance; and a resistor The part includes a second insulator inserted into the connecting part on one side and inserted into the lower end cap on the other side, and a resistor wound along the outer surface of the second insulator. At this time, when heat above a predetermined temperature is transferred to the temperature-sensitive material, the temperature-sensitive material can be shrunk to cut off the flow of current.

According to an embodiment of the present invention, a circular wing extending in the horizontal direction may be formed at one end of the temperature-sensitive substance to contact the connecting portion.

The fuse part according to an embodiment of the present invention may include a first elastic member, one side of the first elastic member is connected to the upper end cap and the other side is connected to the other end of the temperature-sensitive substance.

The fuse part according to an embodiment of the present invention may include a second elastic member, one side of the second elastic member is connected to the connecting part and the other side is connected to one end of the temperature sensitive substance.

According to an embodiment of the present invention, the resistance part may include a third elastic member and a third insulator. The third elastic member is disposed in an inner hole formed in the second insulator and connected to the lower end cap on one side. The three insulators are arranged in the inner hole formed in the second insulator and one side is connected with the third elastic member.

On the other hand, a composite thermal fuse for high voltage according to an embodiment of the present invention may include: a cap to provide a fixing force on the top and bottom of the thermal fuse; , The first insulator forms an inner hole for introducing a temperature-sensitive substance bonded to one side of each of the upper end cap and the middle end cap; The inner wall of the middle end cap and the first insulator to transmit current to the middle end cap; and the resistance part, including a second insulator inserted into the connecting part on one side and inserted into the lower end cap on the other side, and a second insulator along the second insulator Resistance wound on the outer surface. At this time, as in the above-mentioned case, when heat above a predetermined temperature is transferred to the temperature-sensitive material, the temperature-sensitive material can be shrunk to cut off the flow of current.

According to an embodiment of the present invention, the wiring used for current input and output can be connected by seam welding that is melted and compressed using resistance heat that is in electrical contact with the cap.

According to the thermal fuse provided as an embodiment of the present invention, the following outstanding effects can be achieved. (1) Surge resistance characteristics-based on products incorporating a thermal fuse, high heat resistance and high insulation can be ensured even at high voltages above 2.4 kV. (2) Ensure the reliability of cutting off overcurrent and overheating-the use of temperature-sensitive materials containing flux can ensure the reliability of products that can accurately cut off current when overheating. (3) The miniaturization of parts and the effect of reducing manufacturing costs-With a relatively simple structure that can be assembled compactly, miniaturization is easier than before, and manufacturing costs can be reduced more reliably than before.

The terms used in this specification are briefly described, and the present invention is specifically described.

The terms used in the present invention are general terms currently widely used in consideration of the functions of the present invention, but they may be different according to the intentions or cases of those skilled in the art, the emergence of new technologies, and the like. In addition, in certain circumstances, there are also terms arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present invention should be defined based on the meaning of the terms and the content of the entire text of the present invention, rather than the names of simple terms.

In the entire specification, when it is described that a certain part "includes" a certain component, this means that other components may be included without excluding other components unless there is a special description to the contrary. In addition, terms such as "..." described in the specification mean a unit that processes at least one function or operation. In the entire specification, when a part is described as "connected" with another part, it is not only "directly connected", but also includes "interposing another structure" to connect.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that a person with ordinary knowledge in the technical field to which the present invention belongs can easily implement it. However, the present invention can be implemented in various different forms, and is not limited to the embodiments described here. Moreover, in the drawings, in order to clearly explain the present invention, parts irrelevant to the description are omitted, and similar parts are given similar symbols in the drawings throughout the specification.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Fig. 1 is a cross-sectional view of a composite thermal fuse for high voltage according to a first embodiment of the present invention, and Fig. 2(a) and Fig. 2(b) show a high voltage A cross-sectional view of the assembled state and operating state of the composite thermal fuse.

1 and 2(a) and 2(b), the thermal fuse according to the first embodiment of the present invention may include: a cap to provide a fixing force above and below the thermal fuse; a fuse part (20) including The temperature-sensitive substance (21) of flux and the first insulator (22), the first insulator (22) is inserted into the upper end cap (11) and forms an inner hole for introducing the temperature-sensitive substance (21); the connection part ( 30), in close contact with one end of the temperature-sensitive substance (21) and the outer wall of the first insulator (22) to transmit current to the temperature-sensitive substance (21); and the resistance part, including one side inserted into the connecting part ( 30) A second insulator (41) inserted into the lower end cap (12) on the other side, and a resistor (42) wound along the outer surface of the second insulator (41).

The cap according to the first embodiment of the present invention can be divided into an upper end cap (11) corresponding to one end of the thermal fuse and a lower end cap (12) corresponding to the other end of the thermal fuse. Each of the upper end cap (11) and the lower end cap (12) can perform the function of a metal terminal, which provides a fixing force that can make a compression joint included in the thermal fuse, and at the same time connects the input or The wiring of the output. For example, referring to Fig. 2(a) and Fig. 2(b), an input wiring (51) for applying current to the inside of the thermal fuse can be connected to the lower end cap (12). In addition, the upper end cap (11) can be connected to an output wiring (52) for outputting the current applied to the thermal fuse to the outside through the resistance part, the connection part (30), and the fuse part (20).

At this time, according to an embodiment of the present invention, the wiring used for the input and output of the current can be connected by seam welding that is fused and compressed using the resistance heat in electrical contact with the above-mentioned cap. Here, seam welding refers to electric welding performed continuously using electrodes on a roll. For example, the lower end cap (12) and the input wiring (51), and the upper end cap (11) and the output wiring (52) can be welded and connected by seam welding. In addition, during this welding process, the other side end of the temperature sensitive substance (21) connected to the upper end cap (11) is reacted simultaneously, so that the upper end cap (11) and the output wiring (52) can be connected at the same time. And the other end of the temperature sensitive substance (21) is connected.

The fuse unit (20) according to the first embodiment of the present invention is configured to cut off the current flowing inside the thermal fuse to prevent heat above a predetermined temperature from being transferred to the thermal fuse to cause a fire. For example, referring to Figure 2(a), the fuse part (20) can transfer the current transmitted from the connection part (30) to the upper end cap (11) through the temperature-sensitive substance (21) under normal conditions and keep the temperature inside the fuse The current flows. However, when the heat above the melting point of the temperature-sensitive substance (21) is transferred to the thermal fuse, as shown in Figure 2(b), the fuse part (20) can pass through a part of one side end of the temperature-sensitive substance (21) The contraction physically cuts off the contact with the connection part (30), thereby cutting off the current flow inside the thermal fuse.

The temperature-sensitive substance (21) according to the first embodiment of the present invention can be made into a structure in which a metal material such as tin (Sn) surrounds the outer surface of the flux formed in the inner center. Here, the flux refers to additives used for the purpose of reducing oxides, removing toxic gases, preventing oxidation, and promoting the removal of slag when dissolving metals. When the flux forms the inner center of the temperature-sensitive substance (21), the temperature-sensitive substance (21) melts above a certain temperature and has the characteristics of rapid shrinkage. That is, the thermal fuse according to the first embodiment of the present invention can physically cut off the flow of current by using the shrinkage characteristic of the temperature sensitive substance (21) containing flux to high temperatures. For example, when heat above the temperature at which the temperature-sensitive substance (21) can react is transferred to the thermal fuse, the temperature-sensitive substance (21) shrinks rapidly as shown in Fig. 2(b).

In other words, when an excessive current is input through the input wiring (51), the temperature of the second insulator (41) will rise, and the temperature of the second insulator (41) will be transferred to the temperature-sensitive substance contacted by the connecting portion (30) (21) and the first insulator (22). The characteristic of temperature-sensitive substances containing flux is that they shrink in the opposite direction of generating heat. Therefore, a part of one side end of the temperature-sensitive substance (21) melts and rapidly shrinks in a direction opposite to the place where heat is generated, so that it can be completely separated from the rest. As described above, since one end of the temperature-sensitive material (21) is separated, the connection between the temperature-sensitive material (21) and the connection part (30) is disconnected, which can physically cut off the current inside the temperature fuse flow.

On the other hand, according to the first embodiment of the present invention, a circular wing (21a) extending in the horizontal direction may be formed at one end of the temperature-sensitive substance (21) to contact the connecting portion (30). At this time, as shown in Fig. 1, a part of the circular wing may be arranged and fixed between the first insulator (22) and the connecting portion (30). That is, the temperature-sensitive substance (21) can be manufactured in a way that the vertical cross-section has a T-shape, and can be physically and electrically connected to the connecting portion (30) through the T-shaped structure as described above. The reason for making a circular wing (21a) at one end of the temperature-sensitive material (21) is to prevent the following phenomenon: the temperature-sensitive material (21) is connected to the output wiring (52) by welding the upper end cap (11) The temperature rise caused by welding is pulled up in the direction of the other end to cut off the current.

For example, under normal conditions, a part of the circular wing may be in contact with the connecting portion (30) to maintain the flow of current inside the thermal fuse. When the heat above the temperature at which the temperature-sensitive substance (21) can react is transferred to the thermal cutoff, as shown in Figure 2(b), the shrinking force of the temperature-sensitive substance (21) does not combine with any place. One side end of the temperature sensitive substance (21) can be separated from a part of the circular wing fixed by the first insulator (22) and the connecting portion (30). With this separation, the physical and electrical connection between the temperature-sensitive substance (21) and the connecting portion (30) is cut off, so that the flow of current inside the thermal fuse can be completely cut off.

1 and 2(a) and 2(b), in the first insulator (22) according to the first embodiment of the present invention, an inner hole can be formed through the center to configure a temperature-sensitive substance (21) . The inner hole of the first insulator (22) may be formed to have a larger diameter than the horizontal cross-section of the temperature-sensitive substance (21) in order to accommodate the volume of the temperature-sensitive substance (21) that has become larger due to shrinkage. For example, when heat above the temperature at which the temperature-sensitive substance (21) can react is transferred to the thermal fuse, as shown in Figure 2(b), one side of the end is separated due to the shrinking force of the temperature-sensitive substance (21) itself And expand while shrinking along the length. At this time, the inner hole of the first insulator (22) may be formed to have a larger diameter than the horizontal cross-section of the temperature-sensitive substance (21), so as to accommodate the volume of one end of the expansion.

1 and 2(a) and 2(b), the connection part (30) according to the first embodiment of the present invention may include: a horizontal direction for separating the fuse part (20) from the resistance part And a vertical side wall for forming a space in which the fuse part (20) and the resistance part can be inserted up and down. The partition wall and the side wall can be made of metal materials to allow current to flow. At this time, a through hole may be formed in the center of the partition wall so that only a part of one end of the temperature sensitive substance (21) can be contacted. That is, the connecting portion (30) can be physically and electrically connected to a part of the temperature-sensitive substance (21) (for example, a part of a wing at one end) through the partition wall. In addition, the connection part (30) can stably fix the fuse part (20) and the resistance part inside the thermal fuse through the side wall.

1 and 2(a) and 2(b), the resistance part according to the first embodiment of the present invention may include a cylindrical second insulator (41) and an outer surface surrounding the second insulator (41) The winding resistance (42). At this time, the upper end of the second insulator (41) is inserted into the side wall of the connecting portion (30), and the lower end is inserted into the inside of the lower end cap (12), so that the second insulator (41) can be used in addition to the winding resistor (42) The other area completely cuts off the electrical connection between the connecting portion (30) and the lower end cap (12). That is, the lower end cap (12) and the connecting portion (30) can be electrically connected only by the winding resistor (42).

Hereinafter, other embodiments having structural differences from the above-mentioned first embodiment will be explained. On the basis of the first embodiment, the description of the same structure and configuration in each embodiment will be omitted, and the content of the structure and configuration that are different from each other will be specifically described.

3 is a cross-sectional view showing the assembled state and operating state of the composite thermal fuse for high voltage according to the second embodiment of the present invention.

3, the fuse part (20) according to the second embodiment of the present invention may include: a first elastic member (110), one side is connected to the upper end cap (11) and the other side is connected to the temperature-sensitive substance (21) The other side end is connected. That is, according to the second embodiment of the present invention, the first elastic member (110) can be formed between the upper end cap (11) and the temperature sensitive substance (21) in the inner hole of the first insulator (22). The first elastic member (110) can assist in stably compressing the temperature-sensitive substance (21) and the connecting part (30) together. At this time, different from the first embodiment, the temperature-sensitive substance (21) may be the diameter of one end (that is, the end in contact with the connecting portion (30)) and the diameter of the other end (that is, with the first The elastic member (110) has a cylindrical shape with the same diameter at the connected end.

4(a) and 4(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the third embodiment of the present invention, and FIGS. 5(a) and 5 (B) is a cross-sectional view comparing the actions caused by the temperature-sensitive substance (21) containing flux and the temperature-sensitive substance (1) not containing flux according to an embodiment of the present invention.

4(a) and 4(b), the fuse part (20) according to the third embodiment of the present invention may include: a second elastic member (120), one side of which is connected to the connecting part (30) And the other side is connected with one end of the temperature sensitive substance (21). That is, according to the third embodiment of the present invention, a first elastic member (110) can be formed between the upper end cap (11) and the temperature sensitive substance (21) in the inner hole of the first insulator (22), and the connecting portion A second elastic member (120) is formed between (30) and the temperature sensitive substance (21). At this time, unlike the first and second embodiments, when the temperature-sensitive substance (21) shrinks at a predetermined temperature or higher, the contact between the first elastic member (110) and the upper end cap (11) is cut off, thereby The current flow inside the thermal fuse can be cut off. For example, when heat above the temperature at which the temperature-sensitive substance (21) can react is transferred to the thermal fuse, as shown in Figure 4(b), the temperature-sensitive substance (21) is arranged between the elastic members (110, 120). ) Can shrink to the center. Due to this contraction, a force is generated to pull the first elastic member (110) in the direction of gravity, so that the connection between the first elastic member (110) and the upper end cap (11) can be disconnected.

5(a) and 5(b), the difference in the movement of the elastic member caused by whether the temperature-sensitive substance contains flux can be confirmed. Since the temperature-sensitive substance (21) containing flux shrinks while melting above a certain temperature, as shown in Figure 5(a), the elastic members (110, 120) connected to the temperature-sensitive substance (21) shrink due to The temperature sensing material (21) moves up and down respectively. However, since the temperature-sensitive substance (1) that does not contain flux does not have shrinkage properties, it will flow down in the direction of gravity while melting above a certain temperature. Therefore, as shown in Figure 5(b), the temperature-sensitive substance (1) The connected elastic parts (110, 120) will not move and remain in their original positions. Therefore, when the fuse part (20) includes the first elastic member (110) and the second elastic member (120) as shown in the third embodiment of the present invention, it is preferable to use a temperature sensitive substance containing flux (twenty one).

6(a) and 6(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the fourth embodiment of the present invention.

6(a) and 6(b), the resistance part according to the fourth embodiment of the present invention may include: a third elastic member (130) arranged in the inner hole formed in the second insulator (41) The middle and one side is connected to the lower end cap (12); and the third insulator (140) is arranged in the inner hole formed in the second insulator (41) and one side is connected to the third elastic member (130). That is, the third elastic member (130) and the third insulator (140) are structures for assisting the separation of the temperature-sensitive substance (21) and the connecting portion (30), and can be arranged in the center of the interior penetrating the second insulator (41)的内孔中。 In the inner hole. For example, in a short-circuit state that maintains the flow of current, as shown in Figure 6(a), the third elastic member (130) can be compressed to remain connected to the lower end cap (12) and the third insulator (140). state. If heat above the predetermined temperature is transferred to the temperature-sensitive substance (21) and shrinks the temperature-sensitive substance (21), a part of one side end of the temperature-sensitive substance (21) is separated and the third elastic member (130) Expands, and the third insulator (140) rises by the expansion force generated by the third elastic member (130), so that the temperature-sensitive substance (21) and the connecting portion (30) can be physically separated completely.

7(a) and 7(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the fifth embodiment of the present invention.

Referring to Figure 7(a) and Figure 7(b), the composite thermal fuse for high voltage according to the fifth embodiment of the present invention may include: a cap to provide a fixing force on the top and bottom and inside of the thermal fuse; a fuse part, A temperature-sensitive substance (250) containing flux and a first insulator (240) are included, and the first insulator (240) is formed for introduction and bonding to one side of each of the upper end cap (210) and the middle end cap (220) The inner hole of the temperature-sensitive material (250); the middle end cap (220) is coupled to one side end of the temperature-sensitive material (250); the connecting part (260) is tightly attached to the inner wall of the first insulator (240) The current is transmitted to the middle end cap (220); and the resistance part, including a second insulator (270) inserted into the connecting part (260) on one side and a second insulator (270) inserted into the lower end cap (230) on the other side, and along the second insulator The resistor (280) is wound on the outer surface of (270).

Referring to Figure 7(a) and Figure 7(b), the cap according to the fifth embodiment of the present invention can be divided into an upper end cap (210) coupled to the upper part of a temperature-sensitive substance (250), and an upper end cap (210) coupled to the temperature-sensitive substance ( 250) The lower middle end cap (220) and the lower end cap (230) connected to the lower part of the thermal fuse. At this time, the input wiring (51) can be connected to the lower end cap (230) corresponding to one end of the thermal fuse. In addition, the output wiring (52) can be connected to the upper end cap (210) constituting the other end of the thermal fuse. The middle end cap (220) is used to fix the temperature-sensitive substance (250) and electrically connect the connecting portion (260) with the temperature-sensitive substance (250), and can be arranged inside the thermal fuse.

7(a) and 7(b), different from the first embodiment, the first insulator (240) according to the fifth embodiment of the present invention may not be inserted into the upper end cap (210) but coupled to the upper end The outer side of the cap (210) forms the outer wall of the thermal fuse. For example, the upper end cap (210), the temperature sensitive substance (250) combined with the middle end cap (220), and a part of the connecting portion (260) may be arranged in the inner hole penetrating the inner center of the first insulator (240).

Referring to FIG. 7(a) and FIG. 7(b), the connecting portion (260) according to the fifth embodiment of the present invention may be formed in a cylindrical shape whose center is penetrated. At this time, the connecting portion (260) may form a step difference for installing the first insulator (240) and the second insulator (270). For example, the connecting portion (260) can stably support the first insulator (240) by the step formed at the position where the middle end cap (220) is inserted, and form the outer wall of the upper end of the thermal fuse.

On the other hand, the step difference of the connecting portion (260) and the side wall into which the second insulator (270) is inserted can be electrically connected to the middle end cap (220). That is, since the side wall of the connecting portion (260) supporting the first insulator (240) is not electrically connected to the middle end cap (220), the temperature sensitive substance (250) can only be connected to the middle end cap (220) and the connecting portion (260) Electrical connection. Therefore, as shown in (b) of FIG. 7, even if the temperature sensitive substance (250) contracts and contacts the upper end side wall of the connection portion (260 ), the current flow inside the thermal fuse can be interrupted.

The thermal fuse according to an embodiment of the present invention may be coated with paint for minimizing explosion protection on the outside. In order to minimize the explosion-proof caused by the surge that may be generated in the thermal fuse, paint can be applied as shown in Figure 2(a) and Figure 2(b) to surround the thermal fuse incorporating all the components Outside. In addition, the thermal cutoff can be made by inserting a tube for shrinkage or injecting a temperature-resistant resin after coating the exterior paint.

The above description of the present invention is only for illustration, and those with ordinary knowledge in the technical field to which the present invention belongs will understand that it can be easily transformed into other specific forms without changing the technical idea or basic features of the present invention. Therefore, it should be understood that the embodiments described above are only illustrative in all aspects and not restrictive. For example, each component described as a single type can also be implemented in a distributed manner, and similarly, components described as a distributed type can also be implemented in a combined form.

The scope of the present invention is represented by the following patent scope rather than detailed description, and should be interpreted as the meaning and scope of the patent scope and all changes or modifications derived from its equivalent concepts are included in the present invention Within range.

1, 21, 250: temperature sensing material 11.210: upper end cap 12, 230: lower end cap 20: Fuse Department 21a: Wing 22, 240: first insulator 30, 260: connecting part 41, 270: second insulator 42,280: resistance 51: Input wiring 52: output wiring 110: First elastic part/elastic part 120: second elastic part/elastic part 130: third elastic part 140: third insulator 220: Mid-end cap

Fig. 1 is a cross-sectional view showing a composite thermal fuse for high voltage according to a first embodiment of the present invention. 2(a) and 2(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the first embodiment of the present invention. 3 is a cross-sectional view showing the assembled state and operating state of the composite thermal fuse for high voltage according to the second embodiment of the present invention. 4(a) and 4(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the third embodiment of the present invention. 5(a) and 5(b) are cross-sectional views comparing the actions caused by the temperature-sensitive substance containing flux and the temperature-sensitive substance not containing flux according to the third embodiment of the present invention. 6(a) and 6(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the fourth embodiment of the present invention. 7(a) and 7(b) are cross-sectional views showing the assembled state and operating state of the composite thermal fuse for high voltage according to the fifth embodiment of the present invention.

11: Upper end cap

12: Lower end cap

21: Temperature Sensing Substance

21a: Wing

22: first insulator

30: Connection part

41: second insulator

42: resistance

51: Input wiring

52: output wiring

Claims (7)

A composite thermal fuse for high voltage, including: A cap to provide a fixing force above and below the composite temperature fuse; The fuse part includes a temperature-sensitive substance containing flux and a first insulator, the first insulator being inserted into the upper end cap and forming an inner hole for introducing the temperature-sensitive substance; The connecting portion is in close contact with one end of the temperature-sensitive substance and the outer wall of the first insulator to transmit current to the temperature-sensitive substance; and The resistance part includes a second insulator inserted into the connecting part on one side and inserted into the lower end cap on the other side, and a resistor wound along the outer surface of the second insulator, When heat above a predetermined temperature is transferred to the temperature-sensitive material, the temperature-sensitive material is shrunk to cut off the flow of current. The composite thermal fuse for high voltage as described in claim 1, wherein A circular wing extending in the horizontal direction is formed at one end of the temperature-sensitive substance to contact the connecting portion. The composite thermal fuse for high voltage as described in claim 1, wherein The fuse part includes a first elastic member, one side of the first elastic member is connected to the upper end cap and the other side is connected to the other end of the temperature-sensitive substance. The composite thermal fuse for high voltage as described in claim 3, wherein The fuse portion includes a second elastic member, one side of the second elastic member is connected to the connecting portion and the other side is connected to one end of the temperature sensitive substance. The composite thermal fuse for high voltage as described in claim 1, wherein A circular wing extending in the horizontal direction is formed at one end of the temperature-sensitive substance to be in contact with the connecting portion, The resistance part includes a third elastic member and a third insulator, the third elastic member is arranged in an inner hole formed in the second insulator and one side is connected to the lower end cap, and the third insulator is arranged One side of the inner hole formed in the second insulator is connected to the third elastic member. A composite thermal fuse for high voltage, including: Caps provide fixing force on the upper and lower sides and inside of the composite thermal fuse; The fuse part includes a temperature-sensitive substance containing flux and a first insulator, the first insulator forming an inner hole for introducing the temperature-sensitive substance bonded to one side of each of the upper end cap and the middle end cap; The connecting portion is in close contact with the inner wall of the middle end cap and the first insulator coupled to one end of the temperature-sensitive substance to transmit current to the middle end cap; and The resistance part includes a second insulator inserted into the connecting part on one side and inserted into the lower end cap on the other side, and a resistor wound along the outer surface of the second insulator, When heat above a predetermined temperature is transferred to the temperature-sensitive material, the temperature-sensitive material is shrunk to cut off the flow of current. The composite thermal fuse for high voltage according to any one of claims 1 to 6, wherein: The wiring used for current input and output is connected by seam welding that is melted and compressed using resistance heat that is in electrical contact with the cap.

Images