Fast-response thermistor and application thereof

A thermistor and fast response technology, applied in the direction of resistors with positive temperature coefficients, etc., can solve the problems of impracticability and shorten the operating time, and achieve the goals of improving safety, shortening operating time, and excellent thermal conductivity and electrical conductivity. Effect

Inactive Publication Date: 2017-01-04
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, in order to reduce the residual current of polymer PTC thermistors and reduce the response time, the common method used by people is to add metal particles to the raw materials, such as silver, tungsten, copper, nickel, iron, etc. as conductive agents. or increase the amount of conductive carbon black in the raw material, but these methods are not ideal, and they cannot achieve the purpose of shortening the operating time and reducing the residual current

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a fast-response thermistor applied to an air-conditioning electric heater, comprising the following steps:

[0019] (1) Prepare 150 parts of PVP into a sheet-shaped hydrogel by chemical cross-linking method, dry and solidify the sheet-shaped hydrogel, and then calcinate in protective gas argon for 3 hours at a calcination temperature of 600°C to obtain a carbon skeleton;

[0020] (2) Dissolve 50 parts of organosiloxane, 150 parts of polycarbonate, and 30 parts of epoxy resin in a mixed solution of ethanol and N,N-dimethylacetamide, keep it warm at 100°C for 0.5h, and cool to 50~60℃, then add 25 parts of graphene, 10 parts of silver fiber, 12 parts of silicon dioxide in sequence, ball mill for 1.5h, then add 0.8 parts of flame retardant, 0.1 part of antioxidant, 0.1 part of anti-ultraviolet agent and 0.5 part of lubrication agent, ball milled for 20-30 minutes to obtain the mixed base material;

[0021] (3) The carbon skeleton is completely immers...

Embodiment 2

[0023] A method for preparing a fast-response thermistor applied to an air-conditioning electric heater, comprising the following steps:

[0024] (1) Prepare 180 parts of PVP into a sheet-shaped hydrogel by chemical cross-linking method, dry and solidify the sheet-shaped hydrogel, and then calcinate in protective gas argon for 4 hours at a calcination temperature of 450°C to obtain a carbon skeleton;

[0025] (2) Dissolve 50 parts of organosiloxane, 120 parts of polycarbonate, and 32 parts of epoxy resin in dimethyl sulfoxide, keep warm at 90°C for 1 hour, cool to 50-60°C, and then add 20 parts in sequence Multi-walled carbon nanotubes, 8 parts of nickel fiber, 6 parts of silica, ball milled for 1.5 hours, then added 0.3 parts of flame retardant, 0.3 parts of antioxidant, 0.1 part of anti-ultraviolet agent and 0.3 parts of lubricant, ball milled for 20-30 minutes, Obtain the mixed base material;

[0026] (3) The carbon skeleton is completely immersed in the mixed base materia...

Embodiment 3

[0028] A method for preparing a fast-response thermistor applied to an air-conditioning electric heater, comprising the following steps:

[0029] (1) Prepare 180 parts of PVP into a sheet-shaped hydrogel by chemical cross-linking method, dry and solidify the sheet-shaped hydrogel, and then calcinate in protective gas argon for 4 hours at a calcination temperature of 500°C to obtain a carbon skeleton;

[0030] (2) Dissolve 60 parts of organosiloxane, 100 parts of polycarbonate, and 40 parts of epoxy resin in a mixed solution of dimethyl sulfoxide and tetrahydrofuran, keep it warm at 90°C for 2 hours, and cool to 50-60°C. Then add 30 parts of carbon fiber, 5 parts of iron fiber, and 3 parts of silica in sequence, and ball mill for 1 hour, then add 0.1 part of flame retardant, 0.3 part of antioxidant, 0.3 part of anti-ultraviolet agent and 0.5 part of lubricant, and ball mill for 20 to 30 minutes. Obtain the mixed base material;

[0031] (3) The carbon skeleton is completely imm...

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PUM

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Abstract

The invention discloses a fast-response thermistor and application thereof and relates to the technical field of PTC thermistors and application thereof. The fast-response thermistor is composed of polysiloxane, polycarbonate, epoxy resin, PVP, a carbon-based material, metal fibers, silicon dioxide, a fire retardant, an antioxidant, an anti-ultraviolet agent and lubricant. PVP is prepared into flaky xerogel, and a carbon skeleton penetrating through the whole thermistor is obtained after carbonization. The actuation time is effectively shortened, rapid response can be achieved, residual current is reduced, the safety of the thermistor is improved, excellent mechanical performance and corrosion resistance are achieved, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of a PTC thermistor and its application, in particular to a fast-response thermistor and its application. Background technique [0002] At present, household appliances such as air conditioners, humidifiers, and electric heaters generally use electric heaters with fans for heating. However, when the speed of the fan is reduced or stopped due to locked-rotor, failure, or low operating voltage, if the electric heater cannot be disconnected in time, the heating element will continue to dry, which may cause the entire household appliance to overheat deformation, and even catch fire. [0003] A thermistor is a resistor whose resistance value is extremely sensitive to temperature, and its most basic characteristic is that its resistance value changes with temperature. Polymer PTC thermistor is a thermistor made of polymer material filled with carbon black particles. It is widely used in post and telecommunicatio...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L83/04C08L63/00C08K13/04C08K3/04C08K7/06C08K3/36C08K7/24C08K7/18H01C7/02
CPCH01C7/02C08K2201/011C08K2201/014C08L69/00C08L2203/20C08L2205/03C08L83/04C08L63/00C08K13/04C08K3/04C08K7/06C08K3/36C08K7/24C08K7/18
Inventor 汪洋陈启志李国春江盈
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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