PTC thermistor heating element is a modern and future high-tech cutting-edge products. It is widely used in light industry, housing, transportation, aerospace, agriculture, medical, environmental protection, mining, civil equipment, etc. It has excellent advantages compared with nickel, chromium wire or far infrared heating element.
1, there is a constant temperature, temperature control, automatic temperature control of the special features when the PTC element in the application of AC or DC voltage heating, in the Curie point temperature below, the resistivity is very low; when once beyond the Curie point temperature, the resistivity suddenly increased, so that the current down to a stable value, to achieve automatic temperature control, constant temperature purposes.
2, non-combustible, safe and reliable
PTC components do not heat up red, no open flame (resistance wire red and open flame), not easy to burn. PTC components around the temperature beyond the limit, the power automatically drop to the equilibrium value, will not produce a combustion hazard.
3, power saving
PTC element energy input using proportional, limited flow effect, than the nickel-chromium wire and other heating elements of the switching energy input also saves power.
4, long life
PTC element itself for the oxide, no nickel-chrome wire of high-temperature oxidation drawbacks, there is no infrared tube fragile phenomenon, long life. And porous type than non-porous type longer life.
5, simple structure
PTC element itself automatic temperature control, do not need to add another automatic temperature control line device.
6, the use of a wide range of voltage
PTC components in the low-voltage (6-36 volts) and high-voltage (110-240 volts) can be used normally.
Applications of PTC thermistors
Low-voltage PTC elements are suitable for all kinds of low-voltage heaters, low-temperature compensation of instruments, heaters on cars and computer peripherals.
High-voltage PTC components are suitable for heating the following electrical equipment: electric heat preservation plate, shoe dryer, hot melt glue gun, electric rice cooker, electric boots, electric mosquito repellent, intravenous heating, lightweight plastic sealing machine, steam hairbrush, steam generator, humidifier, curling irons, VCRs, photocopying machines, vending machines, hot-air curtains, hand-warming devices, tea dryers, water pipe heaters, travel dryers, Automobile paint booth, liquefied petroleum gas bottle heater, bathtub, beauty container, electric dining table, milk bottle thermostat, electric scorcher, electric hot water bottle, electric blanket and so on.
Technical Requirements of PTC Thermistors
03 Applications of Thermistors
PTC thermistors in circuit control and sensors:
Transistor temperature compensation circuits, temperature measurement and control circuits, overheating protection circuits, incubators, fans, color film flushing, kettles, electric water heaters, electric blankets, fluorescent lamps, energy-saving lamps, battery charging, transformer winding resistance, electric heaters and electric blankets. Charging, transformer winding resistance, heater, delay, compressor, color TV, color display, overcurrent security, level control, electronic ballasts, programmable switches, electronic components aging table.
PTC thermistor in electric heating appliances:
Heater, room heater, dryer (cabinet), tumble dryer, hand dryer, hair dryer, curling iron, steam beauty container, rice cooker, mosquito repellent, hand warmer, shoe dryer, autoclave, disinfectant cabinet, kerosene gasifier, electric irons, soldering iron, plastic soldering gun, sealing machine.
Thermistor selection method:
Each thermistor has a "withstand voltage", "withstand current", "maintenance current" and "action time". You can choose according to the requirements of the specific circuit and the parameters of the product, the specific method is as follows:
1, first of all, to determine the maximum ambient temperature of the normal operation of the protected circuit, the circuit of the operating current, the thermistor action after the need to withstand the maximum voltage and the required action time and other parameters;
2, according to the characteristics of the protected circuit or product selection "Chip type", "radial lead type", "axial lead type" or "surface mount type" and other different shapes of thermistors. "
5. Confirm that the action time of the thermistor of this specification is less than the time required for the protection circuit;
6. Confirm that the dimensions of the thermistor of this specification meet the requirements by comparing with the data provided in the specification.
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