What is the role of PTC heater in the air conditioning system of new energy vehicles
There are two main types of heating plans for the mainstream new energy vehicle air-conditioning systems in the current market. One is the PTC heater plan, which is to energize the thermistor and increase the temperature through the resistance to generate a fever. Tesla ModelX adopts the air PTC plan, which has improved compliance compared with the liquid PTC plan. The second is to adopt heat pump air-conditioning technology to transfer the thermal energy of the low-level heat source to the high-level. The four-way reversing valve in the heat pump system can make the efficiency of the evaporator and condenser of the heat pump air conditioner be adjusted to each other and change the direction of heat transfer, so as to achieve the consequences of cooling in summer and heating in winter. At present, the type of heat pump system is critical, such as a simple heat pump air conditioning system, an indirect heat pump air conditioning system, and an air supplement and enthalpy simple heat pump air conditioning system. Compared with PTC heating, heat pump air conditioners have the advantage of being more energy-efficient, and their energy consumption is about 50% of the latter.
Short-circuit voltage-when one coil is short-circuited, the voltage at the rated frequency applied to generate the rated current in the other coil (in the rated sub-discussion position), it is revealed as a percentage of the rated voltage, which reflects the impedance of the transformer (Resistance and leakage reactance) parameters, also called impedance voltage (temperature 70°C).
Function and parameters of ptc electric heater fuse Rated voltage Rated voltage refers to the large voltage that can be encountered after the fuse is disconnected. The voltage encountered at both ends of the fuse is much less than its rated voltage during the on-time Self-recoverable fuses (made of PPTC plastic polymer) are of three types. Usually, when the fuse is selected, the temperature adjustment of the rated voltage of the high-temperature fan depends on its own material characteristics, so the product is much larger than other products. The demand is greater than the effective circuit voltage. Rated current The rated current is a fuse that can work for a long time. High Current. Assuming that the protection current is Ir, the rated current of the fuse should be selected as the low sag rate of the fuse of different specifications. The higher the temperature of the situation, the higher the temperature of the fuse during operation, and the shorter the application life. What should be exaggerated here is that the air temperature around the fuse should not be confused with the room-related temperature and temperature. PTC ceramic heaters are probably old-fashioned and have a long application life. The temperature response does not require a special temperature controller, thermal resistance thermocouple and another temperature sensor to control the heating of the heater.
