Easy-to-produce antiexplosive voltage-dependent resister

A technology of varistors and varistors, which is applied in the directions of varistors, overvoltage protection resistors, resistor shells/packaging shells/potting, etc., which can solve the problems of optimal shell manufacturing methods and meet safety requirements. The needs of safety, avoiding pollution, and improving the effect of sealing performance

Inactive Publication Date: 2007-03-21
CHENGDU TIEDA ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the technical solution given in the above-mentioned patent application has many advantages, the specific structure of the

Method used

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  • Easy-to-produce antiexplosive voltage-dependent resister
  • Easy-to-produce antiexplosive voltage-dependent resister
  • Easy-to-produce antiexplosive voltage-dependent resister

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: As shown in Figures 1 to 4, an explosion-proof varistor that is easy to manufacture in this embodiment has a housing 1 and a varistor main body 2 contained in the housing. The varistor The main body 2 is composed of a pressure-sensitive ceramic substrate 3 and an insulating coating layer 4 encapsulating the pressure-sensitive ceramic substrate. Two separate internal electrodes 5 and 6 are arranged on the surface of the pressure-sensitive ceramic substrate 3. The varistor main body 2 is provided with a first lead-out electrode 7 and a second lead-out electrode 8, one end of the first lead-out electrode 7 and one end of the second lead-out electrode 8 are respectively connected to two sides of the surface of the varistor ceramic substrate. The inner electrodes 5 and 6 are conductively connected, and there is a gap between the inner wall of the housing 1 and the outer wall of the piezoresistor body 2 to form a housing chamber, which is filled with insulating a...

Embodiment 2

[0046] Embodiment 2: As shown in Figures 5 to 8, the piezoresistor in this embodiment is similar to Embodiment 1, the difference is that in this embodiment, a housing cavity is provided on the housing An exhaust port communicating with the exterior of the housing. In this embodiment, the above-mentioned exhaust port sealing structure is a sealing sheet 11 (the sealing sheet 11 in this example is an aluminum foil sheet) that is pasted on the housing and seals the exhaust port 10 . Meanwhile, the insulating encapsulation layer 4 is an encapsulation layer made of silicone resin. The insulating non-combustible material layer 9 is a quartz sand layer made of quartz sand.

Embodiment 3

[0047] Embodiment 3: As shown in Figures 9-12, the piezoresistor in this embodiment is similar to Embodiment 2, the difference is that in this embodiment, the exhaust port is provided with a Exhaust port sealing structure that opens under impact. The exhaust port sealing structure is a sealing piece 12 whose periphery is fixedly connected with the inner wall of the exhaust port and seals the exhaust port. In this embodiment, an annular weak portion is preset on the housing 1, that is, an annular groove 13, and the housing part surrounded by the inner circle of the annular groove 13 constitutes the above-mentioned sealing piece 12. At the same time, the sealing The position where the blocking piece 12 is located constitutes the reserved exhaust port 10 (see FIG. 13 ). In this structure, it can be considered in a flexible way that the periphery of the sealing sheet 12 is fixedly connected with the inner wall of the exhaust port 10 and seals the exhaust port 10 . As shown in FI...

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Abstract

A varistor uses to produce explosion-protected varistor. It relates to shell and varistors main body inside of shell. The main body is made up of varistor ceramics group piece and insulating layer enveloping the varistor ceramics group piece and there are two detached inner electrodes on surface of varistor ceramics group piece. There are first and second derivation electrode on varistors main body, and the inner wall of shell and the outside wall of varistors main body make up of a hold cavity. Insulated non-burn material fills in the cavity and makes up of the insulated non-burn material layer warped the varistors main body. The bottom is glue-sealed layer and the other ends of the first and second derivation electrodes cross the insulated layer and glue-sealed layer to out of shell. It can effectively enhance the production speed and reduce the production technology to improve the closed ability of shell bottom.

Description

technical field [0001] The invention relates to a piezoresistor, in particular to an explosion-proof piezoresistor which is easy to manufacture. Background technique [0002] As a surge protection component, varistors are widely used in various electronic devices. During use, it is found that when the external surge energy exceeds the withstand capacity of the varistors, the varistors will be broken down and short-circuited. In the actual circuit, the varistor is often connected between the live line and the neutral line of the power supply. When a short circuit occurs, the instantaneous energy is very large, and local high temperature will be generated at the breakdown damage, which may wrap the outside of the varistor ceramic substrate. The insulating and moisture-proof wrapping layer (usually made of organic materials such as epoxy resin as the main material) ignites, and in severe cases, it may cause fires in electrical equipment such as air conditioners. [0003] In re...

Claims

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Application Information

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IPC IPC(8): H01C7/10H01C7/12H01C1/02H01C1/14
Inventor 李炬敬履伟谭宜成
Owner CHENGDU TIEDA ELECTRONICS CORP
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