PTC Heater Control -funktioner

Characteristics of PTC heaters: Heaters made of PTC ceramic heating elements have excellent temperature control and energy-saving characteristics, extremely low thermal inertia, no open flame, no radiation safety, good vibration resistance and other advantages. The reason why PTC heaters are energy-saving is that their output power will decrease significantly with the increase of ambient temperature. When the ambient temperature rises due to heating, the PTC power has decreased under the condition of constant air volume. This feature plays a role in automatic power regulation to a certain extent. On the other hand, it can also be understood that the larger the room temperature, the greater the PTC output power, and the faster the heating. As the room temperature rises, the PTC output power gradually falder, og varmeeffekten bliver langsommere .

High power density is also one of the significant features of PTC heaters. PTC heaters use forced convection to heat the room temperature. Because the heat transfer coefficient of forced convection air is dozens of times that of natural convection, the heat exchange area required to transfer the same amount of heat can be as small as a few tenths. A 100-120W PTC-komponent kan gøres til et volumen så lille som 24 × 15 × 2 . 2mm 3. Dette er nøglen til at gøre PTC-varmeapparater kompakte og lys under den samme effekt . dens volumen og vægt kan være så lille som om en femtedel af den samme kraftelolie-heater.

Aldrende dæmpning er en af ​​de vigtigste parametre til at måle kvaliteten af ​​PTC -varmeapparater . Den aldrende hastighed for PTC -komponenter er den hurtigste i de første 400 timers brug, og så bliver det mere og mere stabilt {2} efter 1000 timer Lille effekt på opvarmningsfunktionen af ​​PTC -varmeapparater . Der er mange faktorer, der påvirker aldring og dæmpning af PTC . Det høje curie -punkt er hovedårsagen . jo højere curie -punkt, jo hurtigere bruger det ofte, jo aldring udgør det, jo ælder udgør det, jo ælder udgør det ofte, at de vil bruge ptc. TC ≥ 260 grader for at fremstille varmeapparater . Det ser ud til at være noget problem i den første brug, men når tiden går, er aldring og dæmpning åbenlyst .

Constant temperature heating PTC thermistor has constant temperature heating characteristics. The principle is that after the PTC thermistor is powered on, the self-heating temperature rises and the resistance value enters the jump zone. The surface temperature of the constant temperature heating PTC thermistor will remain constant. This temperature is only related to the Curie temperature and applied voltage of the PTC termistor og har intet at gøre med omgivelsestemperaturen .

Konstant temperaturopvarmning PTC-termistor kan gøres til en række forskellige former og forskellige specifikationer . almindelige er skive-, rektangel, strimmel, ring og honningkage-porøse ., der kombinerer ovenstående PTC-varmeelementer og metalkomponenter kan danne forskellige former for høje power PTC-varmeapparater.}}}