Jun 29, 2021
Application of PTC Constant Temperature Heating Element
Electric mosquito repellent, massager, warmer, electric soldering iron, electric iron, humidifier, curling iron, hair straightener, gluer, electric fragrancer, hot melt glue gun, electric iron, wax melter, electronic components Thermal insulation, circuit board flooding, etc.
Use the PTC heater as the solid constant temperature heating, the suitable heating temperature is 0~300℃, and the heating temperature at normal temperature is 50~300℃. The adapted environment temperature is -40~250℃. PTC with too high or too low surface temperature is more difficult to manufacture, even without PTC characteristics.
The working voltage is 3.7V~420V, both AC and DC are available. When the working voltage is low, the room temperature resistance of the PTC is very small, the resistance-temperature change rate is also relatively small, and the constant temperature accuracy is worse; in addition, under low voltage, the heating power is small, the heating speed is slow, and it cannot even rise to a relatively high temperature. High temperature.
In terms of safety and reliability, PTC heaters are generally safer than traditional heating wires, with higher insulation voltage resistance, lower leakage current, and more stability. In some applications, the traditional heating wire can not pass the safety certification, but the PTC heater can pass the safety certification, so PTC can be used in the occasions with high safety requirements. However, not all PTCs of all manufacturers, and all PTCs, will meet the requirements for safety. Therefore, it is necessary to choose high-quality PTC manufacturers to supply. PTC is used for solid heating. The main safety and reliability issues are as follows: First, the PTC ceramic body is broken down and burned, resulting in a short circuit and burning the insulating layer; second, the insulating layer is broken down and the shell is charged.
Considering the cost, the temperature control and over-temperature protection part can be omitted for the small area constant temperature heating with the PTC heater. The volume of the PTC can be small and the installation is relatively simple. Constant temperature heating of large heating area, using PTC heater to heat the temperature more uniformly. The life of the PTC constant temperature heater is several times longer than that of the traditional electric heating wire heater. The use of PTC also saves life and maintenance costs.
