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In the heat dissipation structure of the PTC ceramic heater device, the temperature accuracy becomes worse and the tolerance must be increased. In the case that the heat transfer inside the heater is poor and the area of the heat dissipation structure is larger than the heat transfer area of the PTC ceramic body, the temperature accuracy will drop.
PTC heaters have many external temperature elements, so the accuracy of the external constant temperature can not be very high. In places where high temperature control accuracy is required, PTC heaters and temperature controllers can be used. When the external temperature controller is faulty, the heating surface temperature of the PTC heater will not exceed the set constant temperature, which has the function of over-temperature maintenance.
PTC heating element is also called PTC heater, which is composed of PTC ceramic heating element and aluminum tube.
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. Due to the U-shaped corrugated heat sink, the product has improved its heat dissipation rate, combined the advantages of adhesive and mechanical, and fully considered the various thermal and electrical phenomena of the ptc heating element when it is working, and its separation force is strong. , Excellent heat conduction and heat dissipation performance, high efficiency, safe and reliable. This type of PTC heater has the advantages of low 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 power of the PTC heater will automatically drop sharply due to insufficient heat dissipation. At this time, the heater's surface temperature is maintained at about the Curie temperature ( Normally around 250℃), so as not to produce the phenomenon of "redness" such as the appearance of electric heating tube heaters