Anti-explosion long-service-life piezoresistor

A technology of varistors and varistors, applied in varistors, resistors, resistor components, etc., can solve problems such as local high temperature, ignition of coating layers, electrical fires, etc., and prolong service life , Improve the effect of surge resistance

Inactive Publication Date: 2016-07-20
BESTBRIGHT ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional circuit components, varistors are wrapped with organic materials such as epoxy resin. In actual use, they are generally connected in parallel to the protected equipment. When the external surge energy exceeds the tolerance of the varistor, the varistor will be hit. Wearing a short circuit, the energy at the moment of the short circuit is very large, and local high temperature will be generated at the damaged part of the breakdown, which may ignite the coating layer wrapped on the outside of the pressure sensitive chip, and may cause an electrical fire in severe cases

Method used

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  • Anti-explosion long-service-life piezoresistor
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  • Anti-explosion long-service-life piezoresistor

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Experimental program
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Effect test

Embodiment 1

[0026] Such as Figure 1~2 As shown, the long-life piezoresistor with explosion-proof function in this embodiment has a housing 1 and an ordinary coating type piezoresistor 3 filled in the housing 1, and the ordinary coating type piezoresistor 3 and the housing 1 The cavity between them is filled with the buffer filler 2 as quartz sand, and the buffer filler 2 completely wraps the piezoresistor 3, and after the filling is completed, the opening at one end of the shell 1 is filled with the potting compound 4 to form a plugging layer, and at the same time The bent part of the lead wire 6 of the piezoresistor 3 is placed in the sealing layer formed by the potting compound 4, and the buffer filler 2 is quartz sand whose particle size is larger than the size of the circular through hole 5 provided on the shell 1, While ensuring that the air pressure inside the shell 1 is kept in harmony with the outside, it is also possible to avoid leakage of the internal granular buffer filler 2 ...

Embodiment 2

[0028] In this embodiment, the long-life piezoresistor with explosion-proof function has a casing 1 and an ordinary coating type piezoresistor 3 filled in the casing 1, and the gap between the ordinary coating type piezoresistor 3 and the casing 1 is The cavity is filled with ceramic particles with buffer filler 2, and the buffer filler 2 completely wraps the piezoresistor 3. After filling, the opening at one end of the shell 1 is filled with the potting compound 4 to form a sealing layer, and at the same time, the pressure sensitive The bent part of the lead wire 6 of the resistor 3 is placed in the sealing layer formed by the potting compound 4. The particle size of the buffer filler 2 is larger than the size of the strip-shaped through hole 5 provided on the housing 1, ensuring that the inside of the housing 1 While maintaining coordination with the external air pressure, it prevents the leakage of the internal particle-type cushion filling Tao 2.

[0029] The long-life var...

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Abstract

The invention discloses an anti-explosion long-service-life piezoresistor. The anti-explosion long-service-life piezoresistor comprises a housing, buffer filler, pouring sealant, and a piezoresistor body. The buffer filler is particle type insulated moistureproof incombustible material resistant to high temperature and high in strength and wraps the piezoresistor body to achieve the anti-pressing buffer effect, moisture resistance and heat radiation. The housing is provided with via holes so as to adjust air pressure inside and outside and heat radiation. The piezoresistor is a commonly coated piezoresistor and has a gap from the housing to form a filling chamber filled with the buffer filler, the via holes on the housing are smaller than particle size of the buffer filler, leakage of the filler is avoided as functionality is achieved, and the pouring sealant serves as the insulated incombustible materials and seals one end of an opening after the piezoresistor and the buffer filler are filled into the housing. Anti-surge performance of the piezoresistor can be improved, service life of the piezoresistor is prolonged, and the buffer filler can guarantee anti-explosion performance and guard piezoresistor against moisture at the same time.

Description

technical field [0001] The patent of the present invention relates to the technical field of electronic components, in particular to a long-life piezoresistor with explosion-proof function composed of a shell, a buffer filler, a potting glue and a piezoresistor. Background technique [0002] Traditional circuit components, varistors are wrapped with organic materials such as epoxy resin. In actual use, they are generally connected in parallel to the protected equipment. When the external surge energy exceeds the tolerance of the varistor, the varistor will be hit. When the short circuit is worn, the energy at the moment of the short circuit is very large, and local high temperature will be generated at the damaged part of the breakdown, which may ignite the coating layer wrapped on the outside of the pressure sensitive chip, and may cause an electrical fire in severe cases. Contents of the invention [0003] The invention provides a long-life piezoresistor with an explos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C1/02H01C1/028H01C7/10
CPCH01C1/02H01C1/028H01C7/10
Inventor 周全周云福李燕华张晗
Owner BESTBRIGHT ELECTRONICS
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