What is the difference between grain boundary breakdown and thermal breakdown in PTC electric heaters?
With the increase of PTC electric heater voltage, PTC electric heater current becomes larger, resistance decreases, PTC electric heater drops sharply with the increase of temperature. The breakdown of PTCR electric heaters is critical, with grain boundary breakdown and thermal breakdown. Grain boundary breakdown: Due to the abnormal growth of the grain of the one-sided electronic ball valve, or due to the uneven diffusion of the heterogeneous particles, the sign that the one-sided voltage is broken down at the grain boundary is called grain boundary breakdown. In 1963, after mixing single crystal BaTiO3 with single semiconductor, there was no PTC effect, while polycrystalline BaTiO3 ceramics had PTC effect, which is often called PTC sign internationally. PTC electric heater grains belong to semiconductors, grain boundaries belong to the insulating layer, and the external electric field is important to benefit the grain boundary layer.
PTC electric heater system is divided into two types of water storage and fast heating, the important difference is: the water storage electric furnace is to heat the water in the electric furnace, and then heat the hot water of the heat storage tank to the heating system; The fast heat electric steam boiler has no hot water storage tank, and the heated water is simply heated to the heating system. Can be used in kitchens, balconies, basements, attics, etc. It is continuously connected to the radiator through indoor pipes, which can provide domestic hot water for heating and heating at the same time. The installation of the indoor temperature controller can adjust the temperature of the different room at will; When the rest are not at home, they only need to be set in a low-temperature freeze condition; The start time can be set in advance to go home and feel warm. It can save funds, land, human resources, planning, protection of the boiler house, and reduce air pollution.
1. After a period of application, the PTC electric heater has the danger of not heating signs.
(1) The heating wire in the PTC heater is broken, and the disposal technique is: replace the broken wire end or replace a new wire;
(2) Clear lax will lead to poor contact, so that it can be wired from scratch.
2. In the application process, if the electric heating tube is broken, the electric heating tube needs to be replaced.
