PTC Air Heater Function
PTC heater, also known as PTC heating element, is composed of PTC ceramic heating element and aluminum tube. This type of PTC heater has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and energy-saving electric heater. The outstanding feature is safety performance. Under any application, it will not produce the "redness" phenomenon of the surface of electric heating tube heaters, which will cause safety hazards such as burns and fire.
It consists 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. This product uses U-shaped corrugated heat sink to improve its heat dissipation rate, and combines the advantages of adhesive and mechanical types, and fully considers the various thermal and electrical phenomena of PTC heating elements at work. It has strong bonding force, excellent thermal conductivity and heat dissipation performance, high efficiency, safety and reliability. This type of PTC heater has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and energy-saving electric heater. One of its outstanding features is its safety performance. When the fan stops due to a fault, the PTC heater will not be able to dissipate enough heat, and its power will automatically drop sharply. At this time, the surface temperature of the heater is maintained at around the Curie temperature (generally around 250°C), so as not to produce the "red" phenomenon of the surface of the electric heating tube heater.
The constant temperature heating PTC thermistor has a constant temperature heating characteristic. 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 the applied voltage of the PTC thermistor, and has little to do with the ambient temperature. The PTC heater is a heating device designed using the constant temperature heating characteristics of the constant temperature heating PTC thermistor. In small and medium power heating occasions, the PTC heater has advantages that traditional heating elements cannot match, such as constant temperature heating, no open flames, high heat conversion rate, minimal influence by the power supply voltage, and long natural life. Its application in electric heating appliances is increasingly favored by R&D engineers. Constant temperature heating PTC thermistors can be made into a variety of shapes and different specifications, the most common of which are disc, rectangle, strip, ring, and honeycomb porous shapes. Combining the above PTC heating elements and metal components can form various forms of high-power PTC heaters.
(1) PTC ceramic heaters based on heat conduction. Its characteristics are that the heat emitted by the PTC element is transferred to the heated object through a multi-layer heat transfer structure such as an electrode plate (conductive and heat-transferring), an insulating layer (electrical insulation and heat-transferring), and a heat-conducting heat storage plate (some of which are also equipped with heat-conducting glue) installed on the surface of the PTC heating element.
(2) Various PTC ceramic hot air heaters that use the formed hot air for convection heat transfer. Its characteristics are large output power and the ability to automatically adjust the blowing air temperature and output heat.
(3) Infrared radiation heater. Its characteristics are that the heat quickly emitted from the surface of the PTC element or the heat-conducting plate is actually used to directly or indirectly excite the far-infrared paint or far-infrared material in contact with its surface to radiate infrared rays, thus forming a PTC ceramic infrared radiation heater.
