What is the function of PTC heater in the air conditioning system of new energy vehicles

What is the function of PTC heater in the air conditioning system of new energy vehicles

There are two main types of heating plans for air conditioning system of new energy vehicles in the current market. One is the PTC heater plan, that is to power up the thermistor and improve the temperature through the resistor. Tesla modelx adopts the air PTC plan, which is better than the liquid PTC plan. Second, heat pump air conditioning technology is adopted to transfer the heat energy from low heat source to high heat source. The four-way reversing valve in the heat pump system can make the evaporator and condenser of the heat pump air-conditioning adjust to each other, change the direction of heat transfer, so as to achieve the results of cooling in summer and heating in winter. At present, the types of heat pump system mainly include simple heat pump air conditioning system, indirect heat pump air conditioning system and air supplement enthalpy increasing simple heat pump air conditioning system. The advantage of heat pump air conditioning compared with PTC heating is more energy-saving, and its energy consumption is about 50% of the latter.

Short circuit voltage refers to the voltage of rated frequency applied in another coil to generate rated current when one coil is connected to a short circuit (in rated sub circuit). It is revealed as a percentage of rated voltage. It reflects the impedance (resistance and leakage reactance) parameters of transformer, also known as impedance voltage (temperature 70 ℃).

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. There are many types of fuses. The commonly used fuses can be divided into three categories: glass tube fuse (low resolution talent), ceramic tube fuse (high resolution talent) and polymer self recovery fuse (made of PPTC plastic polymer). Usually, when selecting the fuse, 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 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 droop rate of the fuse with different specifications. The higher the temperature is, the higher the working temperature is and the shorter the service life is. What should be exaggerated here is that the air temperature around the fuse should not be related to the room temperature. PTC ceramic heater has a long service life. Temperature response does not require additional temperature controller, thermal resistance thermocouple and other temperature sensors to control the heating of the heater.