Everyone knows that many of the small appliances we use daily have a certain temperature when working, such as hair dryers, heaters, electric irons, etc., in fact, many of them have PTC heaters, so what is a PTC heater, what is the principle of PTC heaters? Let's find out:
What is a PTC heater?
As a new thermistor material, PTC's main uses can be divided into two categories: switching and heating. The use of PTC material has the switching characteristics of heat sensitivity, current limit, delay, etc., and the characteristics of no contact, no noise and long service life, and can be applied to refrigerator starting, motor transformer protection, program-controlled switch protection and mosquito repellent, curling hair iron, electric iron and other small household appliances. Using the characteristics of stable performance, rapid temperature rise, and little influence of power supply voltage fluctuation, various heater products made of heat-generating PTC have become the most ideal alternative to metal resistance wire heating materials. At present, it has been widely used in heaters, dryers, air curtains, air conditioners, etc.
PTC heater principle:
PTC type ceramic heater is composed of PTC ceramic heating component and corrugated aluminum strip by high-temperature gluing. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant temperature and power-saving electric heater. One of its outstanding features lies in the safety performance, and in any application, the surface "redness" phenomenon of electric heating tube heaters will not occur, resulting in scalds, fires and other safety hazards.
PTC heater features:
1. PTC type ceramic heater saves cost and long life.
Temperature feedback can be carried out on the heater without special temperature sensors such as thermostats and thermal resistance thermocouples, and its temperature regulation is based on its own material characteristics, so that the product has a service life much greater than other heaters.
2. PTC type ceramic heater is safe and environmentally friendly.
The design of the heater body heating temperature below 200 degrees Celsius multi-grade, in any case the body is not red and has a protective isolation layer, any application does not need asbestos and other thermal insulation materials for cooling treatment, can be used with confidence There is no problem of scalding the human body and causing fire.
3. PTC ceramic heater saves electric energy.
Compared with electric heating tube and resistance wire heating products, this product relies on the characteristics of the material itself, according to the change of ambient temperature to adjust its own thermal power output, so it can optimize the heater's electric energy consumption to a minimum, and the high heating efficiency of the material also greatly improves the utilization efficiency of electric energy.
PTC type ceramic heater use precautions:
1. PTC heating sheet has the characteristics of automatic constant temperature, no temperature control system is required, and the PTC heating sheet can be directly energized.
2. When the PTC heating sheet is used to heat the liquid (such as water), the PTC heating sheet will not be damaged after the liquid is boiled dry.
3. If the PTC heating sheet is used to heat cold air, the PTC heating sheet will not be damaged when there is no air supply.
4. Long service life, used in normal environment, life can reach more than 10 years.
5. Reliable work, using the internal characteristics of PTC heating plate to control the temperature, will never overtemperature.
6. The working voltage is very wide: When the working voltage changes by 2 times, the change in surface temperature is very small.
7. When multiple PTC heating plates are used together, they should be connected in parallel, not in series.
