What is the heating and heat preservation principle of PTC?
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 transition zone. The surface temperature of the constant temperature heating PTC thermistor will maintain a constant value. The Curie temperature of the thermistor is related to the applied voltage, but basically has nothing to do with the ambient temperature. The PTC heater is a heating device designed by using the constant temperature heating characteristics of the PTC thermistor. The incomparable advantages of traditional heating elements, such as no open flame, high heat conversion rate, minimal influence of power supply voltage, and long natural life, are more and more favored by R & D engineers in the application of electric heating appliances. Constant temperature heating PTC thermistor can be Made into a variety of shapes and specifications, the common ones are disc-shaped, rectangular, strip-shaped, circular, and honeycomb porous. Combining the above-mentioned PTC heating elements and metal components can form various forms of high-power PTC heater.
PTC heaters are divided according to the conduction mode (1) PTC ceramic heaters mainly based on heat conduction. It is characterized by heat conduction and heat storage through the electrode plate (conduction and heat transfer) insulation layer (electricity insulation and heat transfer) installed on the surface of the PTC heating element Multi-layer heat transfer structures such as plates (some also have heat-conducting glue attached), transfer the heat from the PTC element to the object to be heated. It is characterized by large output power, and can automatically adjust the blowing air temperature and output heat. (3) Infrared radiation heater. Its characteristics actually use the heat quickly emitted by the PTC element or the surface of the heat conduction plate to directly or indirectly stimulate the contact with the surface. Far-infrared coatings or far-infrared materials make it radiate infrared rays, which constitutes a PTC ceramic infrared radiation heater.
PTC heaters are divided according to their structural characteristics (1) Ordinary and practical PTC ceramic heaters. Such appliances mainly include: electric mosquito repellent, hand warmer, dryer, electric heating plate, electric iron, electric soldering iron, electric heat bonding It is characterized by low power, but high thermal efficiency and is very practical. (2) Automatic constant temperature PTC heater. Such appliances mainly include: small crystal device constant temperature tank, constant temperature incubator, electronic thermos, Insulation boxes, insulation cups, insulation trays, insulation cabinets, insulation tables, etc. It is characterized by automatic heat preservation, simple structure, good constant temperature characteristics, high thermal efficiency, and wide operating environment temperature range. (3) Hot air PTC heaters. This type of hot air PTC heaters mainly include: small warm air heaters, hair dryers, room heaters , dryers, dry closets, clothes dryers, industrial drying equipment, etc. It is characterized by high output hot air power, fast heating, safety, and automatic adjustment of wind temperature and power consumption.
