One is the waste heat hot water heating system. This heating method is the most widely used in automobiles, and is used in most family cars, small and medium-sized buses, trucks and construction machinery. Its working principle is very simple, that is, using the waste heat of the engine. Resistance is an impedance element, which is used to block the current element. According to ohm's law I = u/r, we can know that when the voltage across the resistor is constant, the greater the resistance value, the smaller the current flowing through the resistor, and the smaller the resistance value, the greater the current flowing through the resistor. The advantages of adding PTC heating wire to the air conditioning system on vehicles are obvious. In winter, when the vehicle starts cold, it can blow out hot air without waiting for the engine water temperature to rise. For some drivers who drive to work for a short distance, it is really fragrant.

Traditional PTC heating. PTC is a kind of resistance heating material, which is heated by heating. The principle of hair dryer and heater at home is similar, but the power of this material is relatively high. Like the first generation model of Weilai ES8, there are two PTC heaters in the front and two PTC heaters in the back, and there is a tee in the front. After the cold car crashes, the exhaust gas is directly discharged to the cab, and the hot air is directly blown out. When the cab temperature rises, the temperature sensor sends out a control signal, and the exhaust gas is switched to be discharged through the rear air pump. So in cold weather, Mercedes-Benz just got on the bus, unlike other low-grade cars, which is equivalent to installing an electric heating system similar to the rear glass near the air outlet of the air conditioner! Automobile rear gear heating is generally carbon fiber heating, which can also be called resistance wire heating.

If there is no car with heating system. It is recommended not to start the car and turn on the car heater immediately. Operating the on-board computer in this way will control the engine speed. Increase the water temperature of the car through the speed of the engine. Repeated operation for a long time will increase the carbon deposition in the engine cylinder, which can be explained by the independent rapid heating structure of Mercedes-Benz engine. When the vehicle detects that the temperature is too low, the system will ignite part of the fuel to quickly heat the engine. Turn on the air conditioner as long as there is electricity. Just like the air conditioner at home, you can directly blow out hot air without waiting for the water to get hot.