WO2021125799A1 - Fusible thermique pour courant continu à haute tension, et module de fusible thermique l'utilisant - Google Patents

Fusible thermique pour courant continu à haute tension, et module de fusible thermique l'utilisant Download PDF

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Publication number
WO2021125799A1
WO2021125799A1 PCT/KR2020/018474 KR2020018474W WO2021125799A1 WO 2021125799 A1 WO2021125799 A1 WO 2021125799A1 KR 2020018474 W KR2020018474 W KR 2020018474W WO 2021125799 A1 WO2021125799 A1 WO 2021125799A1
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WO
WIPO (PCT)
Prior art keywords
alloy wire
fusible
current
thermal fuse
voltage
Prior art date
Application number
PCT/KR2020/018474
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English (en)
Korean (ko)
Inventor
이율우
Original Assignee
이율우
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Filing date
Publication date
Application filed by 이율우 filed Critical 이율우
Publication of WO2021125799A1 publication Critical patent/WO2021125799A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/38—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H2085/0008—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive making use of heat shrinkable material

Definitions

  • the present invention relates to a thermal fuse for high-voltage DC current, and a thermal fuse module using the same, and more particularly, to a circuit by a high-voltage DC current by being disposed on a circuit to which a high-voltage DC current is applied and by breaking the circuit when the peripheral portion is abnormally overheated. It relates to a thermal fuse for high-voltage DC current that prevents damage to in advance, and a thermal fuse module using the same.
  • a thermal fuse is also called a temperature meltable cutout, and is usually mounted in an electronic device which tends to generate
  • the thermal fuse automatically melts to cut off the power supply to protect the electronic device from fire.
  • the thermal fuse is mounted in most home appliances having a main function of heating, such as an electric rice cooker, an electric iron, and an electric stove.
  • the power supply can be cut in time by the thermal fuse which prevents further damage to the appliance, avoiding becoming a fire source.
  • the thermal fuse is the same as a well-known fuse.
  • the thermal fuse serves as overheat protection in the power supply circuit when the temperature range reaches the melting temperature of the fusible alloy wire inside the thermal fuse at the thermal fuse position.
  • the fusible alloy wire is contracted towards the leads at both ends to prevent further damage to other elements of the circuit by the abnormal temperature.
  • the thermal fuse is applied to many circuits requiring overheat protection. Different circuits have different thermal fuses.
  • thermal fuses in the form of simply disposing a fusible alloy wire between spaced lead terminals and lead terminals are fusible formed between the spaced lead terminals due to overheating of the periphery when AC current or low voltage DC current is passed. Since the alloy wire is disconnected and the current flowing along the available alloy wire is no longer applied to the circuit, the electrical safety of the circuit can be ensured in case of abnormal overheating of the periphery.
  • the existing thermal fuse used in the DC current circuit cannot break the protection circuit in time, but also causes unnecessary problems.
  • An object of the present invention devised to solve the above problems, is arranged on a circuit through which a high-voltage DC current is energized, and when the temperature of the surrounding area is overheated above the set melting temperature, the circuit is disconnected so that the high-voltage DC current is transmitted to the circuit.
  • a thermal fuse for high-voltage DC current to prevent damage to the circuit due to the DC current of in advance, and a thermal fuse module using the same.
  • a pair of lead terminals including an input-side lead terminal and an output-side lead terminal disposed to be spaced apart from each other;
  • It is disposed between the spaced apart lead terminals to form a conduction path between the lead terminals, and when heated above a set temperature, melts and disconnects, and comprises one or more available fuse cells for shielding between the lead terminals. .
  • the fusible fuse cell is a fusible alloy wire disposed between the spaced apart input-side lead terminal and the output-side lead terminal, and is overlaid on the outer wall of the fusible alloy wire, and a heat-shrinkable insulating tube having a relatively lower heat-shrinkage temperature than the fusible alloy wire.
  • the heat-shrinkable insulating tube is annularly pressed by the outer diameter of the hot-melted fusible alloy wire through heat shrinking to extrude the molten end of the hot-melted fusible alloy wire to both sides to partition the molten end of the fusible alloy wire.
  • the available fuse cell is disposed between the spaced apart input-side lead terminal and the output-side lead terminal, and includes a main alloy wire and one or more auxiliary available alloy wires connecting the spaced lead terminals in a parallel structure.
  • the main alloy wire is composed of an alloy material that is melted when the set melting temperature is reached, and the auxiliary alloy wire is composed of an alloy material having a relatively higher melting temperature than the main alloy wire.
  • the auxiliary fusible alloy wire is made of a fusible alloy material having a smaller cross-sectional area than the main alloy wire and a high soluble melting temperature.
  • the thermal fuse module according to the present invention is configured by accommodating the thermal fuse for high-voltage DC current according to the present invention in a storage space of a module case, and the module case includes: a storage box having an upper open storage space; Including a cover for closing the open upper portion of the storage box,
  • Conductive shielding pieces protruding downward in the left and right widthwise directions are disposed on the lower portion of the cover, and a conductive section in which a fusible fuse cell of a thermal fuse is disposed through the conductive shielding piece in a storage space, and a spaced apart lead terminal and a fusible alloy It is characterized in that it is formed with a height deviation of the current shielding section in which the junction of the line is formed.
  • the fusible fuse cell having an improved molten disconnection structure between the spaced apart input-side lead terminal and the output-side lead terminal, when abnormal overheating of the periphery occurs, the fusible alloy wires formed in the fusible fuse cell are subjected to high pressure. It is melted and disconnected in a state where the discharge phenomenon is prevented.
  • the fusible fuse cell when the fusible alloy wire is melted short-circuited, the molten end of the fusible alloy wire is physically spaced apart through the axial pipe through the heat shrinkage of the heat-shrinkable insulating tube to prevent a high-pressure discharge phenomenon
  • the fusible fuse cell according to the second embodiment of the present invention is configured to include a main fusible alloy wire and an auxiliary fusible alloy wire having different cross-sectional areas and melting temperatures, and sequential disconnection of the main fusible alloy wire and the auxiliary fusible alloy wire due to abnormal overheating of the periphery This prevents the high-voltage discharge phenomenon.
  • the thermal fuse according to the present invention and the thermal fuse module comprising the same, conduct not only low pressure or AC current but also high voltage DC current of 400V or higher, and when the temperature reaches the set melting temperature or higher, explosion or disconnection between the lead terminals The phenomenon of high-voltage DC current passing in the form of high-voltage discharge is blocked, and as a result, damage to the circuit due to the high-voltage DC current can be prevented in advance.
  • 11 to 16 show a detailed configuration of a thermal fuse module equipped with a thermal fuse for high-voltage DC current according to the present invention and a process of disconnection of available fuse cells formed in the thermal fuse;
  • FIG 17 shows a thermal fuse module of a comparative example of the present invention.
  • the thermal fuses 1, 1' and the thermal fuse module 100 for high-voltage DC current according to the present invention are mainly arranged in a heater circuit to which a high-voltage DC current of 500V or higher is applied, such as an electric vehicle, and the surrounding area is controlled by an electric heater.
  • a high-voltage DC current of 500V or higher is applied, such as an electric vehicle, and the surrounding area is controlled by an electric heater.
  • the temperature is overheated above the set melting temperature, it is a circuit safety component that cuts the circuit and blocks the application of high-voltage DC current to prevent abnormal overheating and damage to the circuit.
  • two or more available fuse cells 20 and 30 are formed in a parallel structure between the spaced apart lead terminals 11 and 12 to conduct electricity from the input-side lead terminal 11 to the output-side lead terminal 12.
  • the high-voltage DC current used is configured to be distributed and applied along a pair of available fuse cells 20 and 30, thereby securing sufficient conduction capacity between the spaced lead terminals 11 and 12 and overheating above the set melting temperature.
  • the available fuse cells 20 and 30 are more rapidly melted and disconnected so as to have rapid reactivity.
  • the available fuse cells (20, 30) that secure the conduction path between the spaced apart lead terminals (11, 12) and that are melted and disconnected by overheating above the set melting temperature to shield the conduction state between the lead terminals.
  • the fusible fuse cells 20 and 30 due to the high-pressure discharge phenomenon generated in the fusible fuse cells 20 and 30 themselves that are melted and disconnected in the process of melting and disconnecting the fusible fuse cells 20 and 30 due to overheating above the set melting temperature.
  • the thermal fuse (1, 1') including the instantaneous explosion and the flames and fragments generated by the explosion are prevented from scattering, enabling a stable disconnection between the lead terminals (11, 12) and
  • the available fuse cells 20 and 30 proposed as preferred embodiments of the present invention will be described in detail.
  • the available fuse cell 20 proposed in this embodiment outputs a high-voltage DC current applied through the input side lead terminal 11 through one fusible alloy wire 21 as shown in FIGS. 1 to 5 on the output side. It is configured to conduct electricity to the lead terminal (12).
  • a fusible alloy wire 21 having a melting temperature of 130° C. between the spaced apart lead terminals 11 and 12, when the peripheral portion is overheated and overheated above the set melting temperature of 130° C., the fusible alloy The wire 21 is disconnected through melting, so that the high-voltage DC current passing through the circuit through the thermal fuse 1 is configured to block.
  • a unique shielding disconnection structure is formed in the fusible fuse cell 20 configured as described above, and the fusible alloy wire 21 constituting each fusible fuse cell 20 by the shielded disconnection structure is melted and disconnected in the process of disconnection. , by preventing the phenomenon of high-voltage discharge by a high-voltage DC current between the molten end 21a of the fusible alloy wire 21 that is melt-disconnected, so that a rapid and stable disconnection of the fusible alloy wire 21 is achieved.
  • the shielded single wire structure proposed in this embodiment is overlaid on the outer wall of the fusible alloy wire 21 disposed between the spaced apart input side lead terminal 11 and the output side lead terminal 12, an insulating tube 22 to suppress the explosion of the fusible alloy wire 21; It is formed between the fusible alloy wire 21 and the insulating tube 22 and includes a flux filler 23 that increases the fluidity of the molten fusible alloy wire 21 .
  • the insulating tube 22 performs a sealing function to prevent external leakage by first sealing the flux filling material 23 to the outer diameter surface of the fusible alloy wire 21, and secondly, it melts through heat shrinkage.
  • the molten end 21a of the fusible alloy wire 21 that is disconnected is configured to be spaced apart from each other, so that the fusible alloy wire 21 is melted at high pressure DC
  • the fusible alloy wire is melted and disconnected quickly and stably.
  • the insulating tube 22 when the insulating tube 22 is heated to a heat-shrinkage temperature, it is configured as a heat-shrinkable insulating tube 22 that shrinks and contracts.
  • the heat-shrinkable insulating tube 22 overlaid on the outer wall of the fusible alloy wire 21 is in annular close contact with the outer diameter of the fusible alloy wire 21 by primary heat shrinkage through preheating, and also heat-shrink with the fusible alloy wire 21
  • the flux filling material 23 formed between the insulating tubes 22 is sealed by the heat-shrinkable insulating tube 22 that is first heat-shrinked through the preheating process to prevent leakage.
  • the heat shrinkage temperature of the heat shrinkable heat transfer tube 22 is configured to be relatively lower than the set melting temperature at which the fusible alloy wire 21 is melted, and the heat shrinkable insulating tube 22 is soluble through heat shrinkage when reaching the heat shrinkage temperature.
  • the outer diameter of the fusible alloy wire 21 having a melting point of 130° C. is covered with a heat-shrinkable insulating tube 22 having a heat-shrinkage temperature of 120° C., as shown in FIGS. 3 to 5, fusible alloy Before the wire 21 is completely melted, the heat-shrinkable insulating tube 22 annularly presses the outer diameter of the fusible alloy wire 21 that is melted while heat-shrinking at a temperature of 120 ° C.
  • the molten ends 21a of the fusible alloy wire 21 hot-melted in the heat-shrinkable insulating tube 22 have stable fluidity by the flux filling material 23, and lead by the pressure of the heat-shrinkable insulating tube 22.
  • the fusible fuse cells 20 that form the sealed state by the heat-shrinkable insulating tube 22 as they are dispersed on both sides where the terminals 11 and 12 are formed, and consequently constitute the thermal fuse 1 by abnormal heating of the periphery. ) of the fusible alloy wire 21 is prevented from being exploded in the process of being disconnected, or from scattering flames or fragments generated by the explosion to the periphery.
  • the molten end 21a of the hot-melted and disconnected fusible alloy wire 21 is not exposed to the outside and is sealed in a sealed state surrounded by the heat-shrinkable heat-shrinkable insulating tube 22, so the disconnected lead terminal Between (11, 12), the high-voltage DC current is discharged while the high-voltage discharge is interrupted, and as a result, damage to the circuit due to the high-voltage DC current is stably prevented.
  • the available fuse cell 30 proposed in this embodiment is disposed between the input side lead terminal 11 and the output side lead terminal 12 spaced apart as shown in FIGS. 1 and 6 to 10 , and spaced apart lead terminals (11, 12) includes two or more fusible alloy wires (31, 33) for connecting in a parallel structure.
  • the main alloy wire 31 having a wide cross-sectional area and the auxiliary alloy wire 33 having a relatively narrow cross-sectional area than the main alloy wire 31 are arranged,
  • the high-voltage DC current passed through the main alloy wire 31 is configured to bypass and conduct along the auxiliary alloy wire 33, so that the main alloy wire 31 )
  • a high-pressure discharge is generated between the molten ends 31a of the main alloy wire 31 during the melting and disconnection process of the main alloy wire 31, so that an explosion occurs in the process of melting and disconnection, or a phenomenon in which flames or fragments generated by the explosion are scattered to the periphery
  • the auxiliary fusible alloy wire 33 is self-resistively heated by the application of overcurrent so as to be quickly disconnected.
  • the main alloy wire 31 is mounted through the inner case 32 comprising a ceramic tube 32a and an insulating mold 32b sealing both ends of the ceramic tube 32a, and the The auxiliary available alloy wire 33 is disposed in a state mounted on the outer case 34 on the outside of the inner case 32, so that the main alloy wire 31 and the auxiliary available alloy wire 33 form a mutual insulating structure. do.
  • the flux 35 is sequentially melted To increase the fluidity of the main alloy wire 31, and the auxiliary use alloy wire 33 to be disconnected.
  • the amount of high-voltage DC current passed through the fusible alloy wires 31 is proportional to the cross-sectional area of the fusible alloy wires 31, and a high-pressure discharge phenomenon occurring in the melting and disconnection process of the fusible alloy wires 31 In addition, it has a characteristic proportional to the cross-sectional area of the fusible alloy wire 31 .
  • the main alloy wire 31 with a larger cross-sectional area than the auxiliary fusible alloy wire 33 applies a large-capacity high-voltage DC current between the input-side lead terminal 11 and the output-side lead terminal 12 spaced apart from each other, so the melting disconnection process
  • the high-pressure discharge phenomenon is largely generated, and the auxiliary fusible alloy wire 33 has a smaller cross-sectional area than the main alloy wire 31, so a low-capacity high-voltage between the input-side lead terminal 11 and the output-side lead terminal 12 Since DC current is applied, high-pressure discharge is small in the process of melting and disconnection.
  • the main alloy wire 31 is composed of an alloy material that is melted when the set melting temperature is reached, and the auxiliary use alloy wire 33 is relatively higher than the main alloy wire 31 It is made of an alloy material with a high melting temperature.
  • the main alloy wire 31 by configuring the main alloy wire 31 with an alloy material having a melting temperature of 130 ° C., and configuring the auxiliary soluble alloy wire 33 with an alloy material having a melting temperature of 180 ° C., When the temperature of the peripheral portion reaches 130 ° C. due to overheating, only the main alloy wire 31 is melted, and the auxiliary alloy wire 33 having a relatively higher melting temperature than the main alloy wire 31 is not melted. do.
  • the high-voltage DC current that is normally passed through the main alloy wire 31 is an auxiliary soluble alloy It is turned on and energized along the line (33).
  • the auxiliary fusible alloy wire 33 has a relatively smaller cross-sectional area than the main alloy wire 31, the high-pressure discharge phenomenon between the molten ends 33a is minimized in the process of disconnection of the molten ends 33a and As a result, rapid disconnection is possible without the occurrence of explosions due to high-pressure discharge.
  • the thermal fuse 1 ′ in which the fusible fuse cell 30 according to the present embodiment is disposed explodes in the process in which the input side lead terminal 11 and the output side lead terminal 12 are disconnected from each other due to abnormal overheating of the periphery. It is quickly disconnected between them without any phenomenon, and the damage to the circuit caused by the high-voltage DC current is stably prevented.
  • the thermal fuses 1 and 1 ′ including the available fuse cells 20 and 30 are made of a ceramic material. It is configured in a form accommodated in the case 110 .
  • the thermal fuses 1 and 1 ′ prevent the physical disconnection of the fusible fuse cells 20 and 30 due to external shock or interference by the module case 110, and also prevent the disconnection process due to melting. It fundamentally blocks the spread of unexpected flames or fragments to the outside.
  • the module case 110 includes a storage box 111 having an upper open storage space 111a formed therein; and a cover 112 for closing the open upper part of the housing 111, and in this embodiment, the housing 111 and the lid 112 constituting these module cases 110 are ceramic molded articles having excellent insulation properties. consist of
  • an insulating fluid 130 such as insulating silicon is filled in the storage space 111a of the module case 110 housing the thermal fuses 1 and 1', and the available fuses accommodated in the storage space 111a. Prevents oxidation of cells 20 and 30.
  • fixing holes 112a are formed to penetrate vertically on both sides of the cover 112 disposed on the upper portion of the storage box 111, and lead terminals 11 on both sides of the upper portion of the storage space 111a as shown in FIG. , 12) are respectively exposed and then molded through the epoxy resin 120 to seal the storage space 111a.
  • the fixing holes 112a formed in the upper surfaces of the lead terminals 11 and 12 and the cover 112 communicate vertically, and the epoxy resin 120 introduced through the fixing holes 112a is connected to the lead terminals 11 , 12) to achieve standardized fixation of the lead terminals 11 and 12 constituting the thermal fuse 1 by being fixed to the surface.
  • a cell partition piece 112c for mutually shielding the available fuse cells 20 and 30 disposed between the input side lead terminal 11 and the output shaft lead terminal 12 .
  • a cell partition piece 112c for mutually shielding the available fuse cells 20 and 30 disposed between the input side lead terminal 11 and the output shaft lead terminal 12 .
  • the thermal fuses (1, 1') in which the fusible fuse cells (20, 30) are disposed between the spaced apart lead terminals (11, 12) are accommodated in the accommodation space (111a) of the module case (110).
  • the thermal fuse module 100 by disposing the energized shielding piece 112b protruding downward in the left and right width directions under the cover 112, the receiving space 111a by the energized shielding piece 112b ) in the conduction section (S1) in which the available fuse cells (20, 30) of the thermal fuse (1) are disposed through, and the junction points (P1, P2) of the spaced apart lead terminals (11, 12) and the fusible alloy wire (21) ) is formed with a height deviation of the formed current shielding section (S2).
  • the available fuse cells 20 and 30 are formed by dividing the left and right by the energized shielding piece 112b and formed at a relatively higher point than the energized section S1. Therefore, the energizing distance L1 between the available fuse cells 20 and 30 is increased by the energized shielding piece 112b.
  • FIG. 17 showing a comparative example of the present invention
  • a short energizing distance L2 is formed between the fusion ends 21a, 31a, 33a due to the relationship that the current shielding piece is not formed between the molten ends, but the present invention
  • a longer energization possible interval L1 passing through the energization shielding section S2 and the energization section S1 is formed by the energization shielding piece 112b.
  • the energized shielding piece ( 112b) which secures a long energizable interval L1 through the energized shielding piece 112b, in a state in which the available fuse cells 20 and 30 are disconnected due to overheating above the set melting temperature, the energized shielding piece ( 112b), a phenomenon in which a high-voltage DC current is continuously passed between the lead terminals 11 and 12 in the form of a high-voltage discharge is blocked, so that damage to the circuit due to the high-voltage DC current can be prevented in advance.
  • the thermal fuse for high-voltage DC current in the process of melting and disconnecting the fusible alloy wire constituting the fusible alloy cell due to overheating of the periphery, the high-pressure current is discharged between the molten ends, so that the molten disconnection is delayed or , it is possible to prevent electrical safety accidents such as fires in the surrounding area as flames or scattering products from the explosion are scattered.
  • the present invention is actively utilized in related fields such as electric vehicles using high-voltage DC current, and secures electrical safety by stably blocking the DC current due to overheating of the peripheral part.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

La présente invention concerne un fusible thermique pour courant continu à haute tension, et un module de fusible thermique l'utilisant, et plus particulièrement, un fusible thermique pour courant continu à haute tension, et un module de fusible thermique l'utilisant, le fusible thermique étant disposé sur un circuit auquel est appliqué un courant continu à haute tension, et déconnecte le circuit lorsque l'environnement est surchauffé de manière anormale, ce qui permet d'empêcher une détérioration du circuit due au courant continu à haute tension.
PCT/KR2020/018474 2019-12-19 2020-12-16 Fusible thermique pour courant continu à haute tension, et module de fusible thermique l'utilisant WO2021125799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190170571A KR102281423B1 (ko) 2019-12-19 2019-12-19 차폐 안정성이 확보된 고압 dc 전류용 온도퓨즈, 및 이를 이용한 온도퓨즈 모듈
KR10-2019-0170571 2019-12-19

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WO2021125799A1 true WO2021125799A1 (fr) 2021-06-24

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WO (1) WO2021125799A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102661886B1 (ko) * 2022-03-17 2024-04-26 이율우 개량된 단선구조를 갖는 전류퓨즈와, 이를 이용한 고압 퓨즈성형체

Citations (5)

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JPH10188757A (ja) * 1996-12-26 1998-07-21 Anzen Dengu Kk 温度ヒューズ
JP2001266733A (ja) * 2000-03-22 2001-09-28 Yazaki Corp ヒューズ
JP2001345035A (ja) * 2000-05-31 2001-12-14 Nec Schott Components Corp 保護素子
US20050030148A1 (en) * 2003-07-28 2005-02-10 Atsushi Kono Thermal fuse and method of manufacturing fuse
JP2007035535A (ja) * 2005-07-29 2007-02-08 Nec Schott Components Corp 温度ヒューズを用いた保護装置

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US4948828A (en) 1989-01-31 1990-08-14 Cooper Industries, Inc. Asbestos free material for gassing current limiting fuses
US4952900A (en) 1989-12-04 1990-08-28 Westinghouse Electric Corp. Controlled seal for an expulsion fuse and method of assembling same
CN2513223Y (zh) 2001-12-05 2002-09-25 倪学锋 封闭式高压熔断器
CN203839326U (zh) 2014-05-07 2014-09-17 厦门赛尔特电子有限公司 一种高压直流温度保险丝

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
JPH10188757A (ja) * 1996-12-26 1998-07-21 Anzen Dengu Kk 温度ヒューズ
JP2001266733A (ja) * 2000-03-22 2001-09-28 Yazaki Corp ヒューズ
JP2001345035A (ja) * 2000-05-31 2001-12-14 Nec Schott Components Corp 保護素子
US20050030148A1 (en) * 2003-07-28 2005-02-10 Atsushi Kono Thermal fuse and method of manufacturing fuse
JP2007035535A (ja) * 2005-07-29 2007-02-08 Nec Schott Components Corp 温度ヒューズを用いた保護装置

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KR102281423B1 (ko) 2021-07-23

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