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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: 2013-07-03
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 an alarm signal, but needs to be transmitted through other peripherals. alarm circuit and alarm device to realize the alarm, which increases the complexity of electrical equipment, and is not conducive to the improvement of circuit reliability

Method used

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specific Embodiment

[0029] A preferred structure of the alarm type thermal fuse of the present invention is given in the embodiment, as figure 1 As shown, it includes: a casing 50 formed by sintering ceramics, an alarm electrode 30 fixed in the casing 50, a first electrode 10, a second electrode 20, and an alloy fuse 40 connecting the first electrode 10 and the second electrode 20; The alarm electrode 30 is adjacent to the first electrode 10 or the second electrode 20, and is used to weld the alloy fuse 40 with the alarm electrode 30 after fusing and shrinking and reuniting; the alloy fuse 40 is wrapped around to help Shrinkage agent 60. Epoxy resin sealing compound 70 is provided at both ends of the housing 50 , and the first electrode 10 , the second electrode 20 and the alarm electrode 30 are packaged and fixed by the epoxy resin sealing compound 70 and drawn out. The first electrode 10 and the second electrode 20 are fuse electrodes, preferably, the material of the fuse electrodes is copper....

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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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Patent Type & Authority Patents(China)
IPC IPC(8): H01H85/30H01H85/06
Inventor 李文富
Owner DELTA GREENTECH CHINA CO LTD
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