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Polymer-based temperature-sensitive resistor with circuit protection function

A technology of circuit protection and temperature-sensitive resistance, which is applied to thermometers, instruments, thermometers, etc. that use electric/magnetic components that are directly sensitive to heat, and can solve problems such as damage to precision equipment of electrical equipment, complex internal design volume, and increased cost space. , to achieve the effects of avoiding damage or even damage, good size applicability, and fast temperature response

Inactive Publication Date: 2020-02-14
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing protector based on temperature-sensitive design, such as patent number: CN208891118U, has at least the following problems: if the main body of the protection is an inductive load, an induced electromotive force will be generated when the high-temperature trigger circuit is disconnected instantaneously, and the superposition of the power supply will affect the electrical equipment. Especially precision equipment is damaged or even damaged
And the internal design is complex and bulky
For precision equipment, most of the existing power failure prevention solutions are to install UPS backup power system, but it will undoubtedly increase its cost and occupy a large space

Method used

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  • Polymer-based temperature-sensitive resistor with circuit protection function
  • Polymer-based temperature-sensitive resistor with circuit protection function
  • Polymer-based temperature-sensitive resistor with circuit protection function

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Experimental program
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Embodiment 1

[0029] Using polydimethylsiloxane (PDMS) as a flowable medium and graphite (Graphite) as functional particles, graphite and PDMS are mixed at a mass ratio of 1:10 to form a graphite-PDMS mixed solution, and the mixed solution is A curing agent was added to the mixture, and the mass ratio of curing agent to PDMS was 1:10. After the obtained liquid is vacuum homogenized by a homogenizer, it is evenly poured into the mold and placed vertically between the positive and negative plates of the electric field for 10 minutes, and the mold is heated to 100°C for 90 minutes by using a hot stage. After natural cooling, take it out to get a temperature sensitive resistor made of graphite and PDMS. Its internal structure is as attached figure 2 .

[0030] Test: Use a DC low-voltage resistance tester to measure the real-time temperature and resistance of the device within the temperature range of 25-50°C, and the resistance-temperature change is as follows: image 3 .

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Abstract

The invention relates to a polymer-based temperature-sensitive resistor with the circuit protection function. The circuit protector is characterized in that a polymer is used as a matrix and micro-nano particles are used as main conductive bodies. A micro-electric path is built by regulating an aggregation structure of the micro-nano particles in the matrix at an external field to serve as a circuit protector. Compared with the instantaneous power-off characteristic of the existing temperature-sensitive resistor, the temperature-sensitive resistor has a power-off protection function, so that the damage to inductive load equipment caused by sudden switching of the on-off state of the circuit is eliminated. Moreover, the sensitivity of the temperature-sensitive resistor can be designed basedon the external field regulation to meet requirements of different temperature intervals; and the polymer-based temperature-sensitive resistor has high applicability and stability. The whole temperature-sensitive resistor is simple to manufacture, adjustable in appearance and small in occupied space.

Description

【Technical field】 [0001] The invention relates to the technical field of electrical components, in particular to a polymer-based temperature-sensitive resistor with a circuit protection function. [0002] 【technical background】 [0003] Thermistor refers to a type of resistance whose resistance value changes with temperature. It is a type of sensitive element. According to the temperature coefficient, it is divided into positive temperature coefficient thermistor (PTC) and negative temperature coefficient thermistor (NTC) . It is widely used in various household and factory electrical appliances. It can ensure the operation of electrical appliances in a safe temperature in daily use and production, and protect the temperature of circuits and equipment. [0004] However, the existing protector based on temperature-sensitive design, such as patent number: CN208891118U, has at least the following problems: if the main body of the protection is an inductive load, an induced elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/16G01K1/12
CPCG01K7/16G01K1/12
Inventor 陈玉伟杨吉颖袁称心刘玉红张白浪胡振东吴韦菲王泉李佳蕾王新段咏欣张建明
Owner QINGDAO UNIV OF SCI & TECH
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