Alarm type thermal fuse-link

A technology of thermal fuses and fuses, which is applied in the direction of electrical components, circuits, emergency protection devices, etc., can solve the problems of increasing the complexity of electrical equipment, failing to output alarm signals, unfavorable circuit reliability, etc. The effect of improving reliability and reducing design difficulty

Inactive Publication Date: 2010-06-30
DELTA GREENTECH CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use of thermal fuse overheating protection, it is often necessary to cut off the power supply in time and send out an alarm remote signaling signal at the same time. However, the existing two-pole thermal fuse itself cannot output

Method used

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  • Alarm type thermal fuse-link

Examples

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Example Embodiment

[0028] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings:

[0029] A preferred structure of the alarm thermal fuse according to the present invention is given in the embodiment, such as figure 1 As shown, it includes: a casing 50 formed by ceramic sintering and an alarm electrode 30, a first electrode 10, a second electrode 20 and an alloy fuse link 40 that is connected to the first electrode 10 and the second electrode 20 fixed in the casing 50; The alarm electrode 30 is adjacent to the first electrode 10 or the second electrode 20, and is used to make the alloy fuse-link 40 melt and weld together with the alarm electrode 30 after the alloy fuse-link 40 is fused and contracted and agglomerated; Shrinker 60. Two ends of the casing 50 are provided with epoxy resin sealing material 70 , the first electrode 10 , the second electrode 20 and the alarm electrode 30 are encapsulated and fixed by ...

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Abstract

The invention discloses an alarm type thermal fuse-link which comprises a shell, a first electrode and a second electrode which are arranged in the shell and an alloy fuse-link which is connected with the first electrode and the second electrode. Besides, an alarm electrode is arranged aside the first electrode or the second electrode while a contracting agent is packed around the alloy fuse-link. When the alloy fuse-link automatically fuses caused by the overheating alarm type thermal fuse-link, the fused alloy fusing material contacts towards the electrode direction at two ends and reunitesat the position of the electrode under the action of the surface tension and the contracting agent. Due to the alarm electrode arranged on one end, the reunited fused alloy fusing material connects the alarm electrode with the electrode so as to form a close contact to output a normally closed contact signal. The alarm type thermal fuse-link of the invention can output an alarm remote-control signal while can automatically fuse the circuit by the fuse.

Description

technical field [0001] The invention relates to a thermal fuse, in particular to an alarm type thermal fuse capable of outputting an alarm remote signaling signal. Background technique [0002] Thermal fuse (temperature fuse) is a non-resettable one-time thermal protection device, mainly used in overheating protection of household appliances and industrial equipment (such as: electric fans, motors, transformers, rice cookers, electric frying pans, disinfection Cabinets, electric heating water bottles, etc.), are also widely used in lightning protection fields such as surge protectors (SPD). The thermal fuse is usually connected in series in the equipment circuit. When the temperature rises to the set protection value due to abnormal operation of the equipment, the thermal fuse acts to cut off the circuit to prevent safety accidents. [0003] At present, all structures in the field of thermal fuses at home and abroad are of the two-pole type, that is, an alloy is connected b...

Claims

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Application Information

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IPC IPC(8): H01H85/30H01H85/06
Inventor 李文富
Owner DELTA GREENTECH CHINA CO LTD
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