Principle and function of PTC heater

- Sep 27, 2020-

PTC heater


PTC heater is also called PTC heating element, which is composed of PTC ceramic heating element and aluminum tube. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and power saving. The outstanding feature lies in the safety performance. In any application, there will be no "redness" phenomenon on the surface of the electric heating tube heater, which may cause burns, fires and other safety hazards.


PTC heater


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It is composed of galvanized outer pressure plate, stainless steel corrugated spring sheet, galvanized inner pressure plate, single-layer aluminum heat sink, ptc heating sheet, double-layer aluminum heat sink, nickel-plated copper electrode terminal and pps high temperature plastic electrode sheath. The product adopts U-shaped corrugated heat sink, which improves its heat dissipation rate, combines the advantages of adhesive and mechanical, and fully considers the various thermal and electrical phenomena of ptc heating elements during operation, and its bonding force is strong , Excellent heat conduction and heat dissipation performance, high efficiency, safety and reliability. This type of PTC heater has the advantages of small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and power saving. One of its outstanding features lies in its safety performance. Even when the fan fails to stop, the PTC heater will not get sufficient heat dissipation, and its power will automatically drop sharply. At this time, the surface temperature of the heater is maintained at about the Curie temperature ( Generally around 250°C), so as not to cause "redness" on the surface of heaters such as electric heating tubes.

PTC heater

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PTC heater principle


The constant temperature heating PTC thermistor has the characteristics of constant temperature heating. The principle is that the PTC thermistor self-heats after powering up to make the resistance enter the jump zone. The surface temperature of the constant temperature heating PTC thermistor will maintain a constant value. This temperature is only the same as the PTC The Curie temperature of the thermistor is related to the applied voltage, but basically has nothing to do with the ambient temperature. PTC heater is a heating device designed by using constant temperature heating PTC thermistor constant temperature heating characteristics. In the occasion of low and medium power heating, PTC heater has the advantages of constant temperature heating, no open flame, high heat conversion rate, minimal influence of power supply voltage, long natural life and other traditional heating elements. The application in electric heating appliances is becoming more and more popular. Favored by R&D engineers. The constant temperature heating PTC thermistor can be made into a variety of shapes and structures and different specifications, the common ones are disc, rectangle, strip, ring and honeycomb porous. Combining the above-mentioned PTC heating elements and metal components can form various forms of high-power PTC heaters.