Piezoresistance with alloy type temperature fuse

A temperature fuse, varistor technology, applied in varistor, varistor core, overvoltage protection resistors and other directions, can solve the problems of easy failure, complex structure, failure, etc. Quick response, easy installation and simple effect

Active Publication Date: 2007-03-07
XIAMEN SET ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of whether varistors are used in power lines or electronic circuits, if various types of overvoltages occur frequently, varistors will operate frequently to suppress the overvoltage amplitude and absorb and release surge energy to protect electrical equipment and components. device, which will inevitably lead to performance degradation or even failure of the varistor
Existing varistors with overvoltage protection are either complex in structure, such as the traditional mode fast thermal tripping device and Chinese patent 02222055.0; or the response speed of the temperature insurance as an overheating protection structure is too slow or the ability to withstand large current shocks Weak and easy to fail, such as the traditional shrapnel type thermal tripping device, the external organic type thermal fuse, the external alloy thermal fuse and Chinese patent 00237913.9

Method used

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  • Piezoresistance with alloy type temperature fuse
  • Piezoresistance with alloy type temperature fuse
  • Piezoresistance with alloy type temperature fuse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] As shown in Figure 1 and Figure 2, the surface of the varistor 2 and the alloy type thermal fuse 4 are adjacent to each other and installed in the cavity 1, the gap and the cavity 1 are filled with alloy flux 7, and then sealed with epoxy resin The material 6 seals the opening of the cavity 1, and the piezoresistor pin 3 and the fuse pin 5 are arranged outside the opening of the cavity 1. When the varistor 2 heats up due to various factors, the heat can be transferred to the surrounding alloy flux 7 through its surface layer, and then the alloy flux 7 transfers the heat to the alloy fuse 4 until the alloy is heated and melted. Under the action of the alloy flux 7, it quickly shrinks to the two fuse pins 5 (as shown in Figure 2), thereby cutting off the circuit and separating the deteriorating piezoresistor 2 from the circuit, and the thermal response speed is very fast. Its structure is simple and compact.

Embodiment 2

[0032] Figure 3 is a schematic diagram of two pin embodiments of the present invention, a pin 3 of the varistor 2 is connected with a pin 5 of the alloy type temperature fuse 4 and is sealed in the cavity; the varistor 2 and the alloy type temperature fuse The other pins of the fuse 4 respectively extend outside the cavity.

Embodiment 3

[0034] Figure 4 is a schematic diagram of three pin embodiments of the present invention, two pins 3 of the piezoresistor 2 are all extended outside the cavity, and one of the pins 3 is connected to a pin 5 of the alloy type thermal fuse; Another pin 5 of the thermal fuse 4 extends outside the cavity.

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Abstract

This invention relates to alloy temperature safety wire pressure sensitive resistance suitable for zin oxidation pressure sensitive resistance for over voltage protection. This invention comprise pressure sensitive resistance, which locates the resistance and safety wire into one compact chamber with near surface and with leg extending outside chamber with alloy melt agent. This invention locates one resistance and alloy temperature wire into compact chamber with legs extending outside and wire is set into other chamber with alloy assistant agent.

Description

technical field [0001] The invention relates to a varistor with an alloy temperature fuse, which is especially suitable for a zinc oxide varistor and used for overvoltage protection. Background technique [0002] Zinc oxide varistors are widely used as overvoltage protection and surge absorbing components for lines, equipment and components due to their superior conductivity. Regardless of whether varistors are used in power lines or electronic circuits, if various types of overvoltages occur frequently, varistors will operate frequently to suppress the overvoltage amplitude and absorb and release surge energy to protect electrical equipment and components. device, which will inevitably lead to performance degradation or even failure of the varistor. Existing varistors with overvoltage protection are either complex in structure, such as the traditional mode fast thermal tripping device and Chinese patent 02222055.0; or the response speed of the temperature insurance as an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/10H01C7/112H01C7/12H01H85/00
Inventor 徐忠厚
Owner XIAMEN SET ELECTRONICS
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