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Voltage dependent resistor

A technology of varistors and fuses, applied in varistors, overvoltage protection resistors, etc., can solve the problems of low thermal efficiency, slow transmission speed, and long operating time, and achieve large heat collection area, high thermal efficiency, and prevent aging effect

Active Publication Date: 2010-10-27
THINKING ELECTRONIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems in this patent: the heat is transferred to the top of the fuse with a long conduction path, slow transfer speed, and long disconnection time
There is a problem in this patent: the alloy fuse in the thermal fuse does not receive the heat from the pressure-sensitive chip at close range, and the heat needs to pass through a long wire or epoxy resin with poor heat transfer to the alloy in the thermal fuse Fuse
Slow heat transfer, long action time, low thermal efficiency

Method used

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Embodiment Construction

[0020] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0021] Such as Figure 1-2 The piezoresistor shown includes a casing 1, a fuse 3 and a piezoresistive element 5 are arranged in the casing 1, an insulating layer 7 is arranged between the fuse 3 and the piezoresistive element 5, and the insulating layer 7 is connected with the piezoresistive element 5 through a metal conductor 9 using a high-temperature metal. Moreover, the first pin 19 and the second pin 21 are connected to both ends of the piezoresistive element 5, the second pin 21 is connected to the piezoresistive element 5 through the metal conductor 9, and the insulating layer 7 is provided with a through hole 11, so...

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Abstract

The invention relates to a fast-response thermal protection varistor, comprising a shell in which a fuse and a varistor are arranged. An insulating layer is arranged between the fuse and the varistor. The insulating layer is connected with the varistor by a metal conductor through high temperature metal. The fast-response thermal protection varistor ensures that the low temperature alloy fuse cansense the heat of the varistor directly and quickly. Furthermore, the fast-response thermal protection varistor has large collector area, short heat transfer path and high heating efficiency and effectively prevents the aging of the varistor.

Description

technical field [0001] The invention relates to a zinc oxide varistor, in particular to a fast-response thermal protection varistor. Background technique [0002] In the existing technology, U.S. Patent 6636403 provides a varistor with thermal protection function. One end of the fuse is directly welded on the chip, and the other end of the fuse is connected to a metal wire, which is used as a varistor pin. . A ceramic sheet is installed between the metal wire and the pressure-sensitive chip for insulation and isolation. The top of the fuse is pressed with organic matter, and the working mechanism is: when the temperature of the pressure-sensitive chip increases, heat is transferred to the organic matter on the top of the fuse, and the organic matter expands when heated, breaking the melted fuse. There are problems in this patent: the heat is transferred to the top of the fuse with a long conduction path, slow transfer speed, and long disconnection time. In addition, due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12H01C7/10
Inventor 屠克俭高长安周垠群
Owner THINKING ELECTRONIC IND CO LTD
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