Tungsten wire is used as a heating wire in cigarette lighters. The cigarette lighter is a component found in all cars and is used to facilitate the owner to light a cigarette when smoking.
The power supply is generally DC 12 volts (different models may vary), the elastic head in the middle is the positive pole, and the buckles on both sides are the negative pole. It is directly connected to the battery used in the car, and the current and power are the same as the battery. The arc-type cigarette lighter saves power, but the circuit is complex, the electrical stability and safety of use are poor, and the manufacturing cost is relatively high. Tungsten wire cigarette lighter is simple, stable, low cost and safe to use. The disadvantage is that it consumes a little more electricity.
The main part of the cigarette lighter structure is actually an electric heating coil. The main material of the electric heating coil is tungsten wire, because tungsten wire has good winding performance, does not sag, and has excellent high temperature resistance and processing performance. The two poles of the electric heating coil are connected to slot 2 corresponding to the positive pole of the power supply (the outer ring of the electric heating coil is connected to slot 2), and slot 1 corresponding to the negative pole of the power supply (the center pole of the electric heating coil is connected to slot 1). There is also a radial spring in the plug to automatically spring up after heating.
principle
When the cigarette lighter plug is inserted into the socket, the spring blade in the socket will clamp the No. 1 slot on the cigarette lighter. The cigarette lighter electric heating coil, that is, the center pole of the tungsten wire is connected to the socket shell, which is connected to the negative pole of the battery. . Press and hold the upper part of the cigarette lighter handle toward the cigarette lighter socket, and press down. The positive bimetallic piece K in the cigarette lighter socket will block the No. 2 slot. The outer ring of the electric heating coil is connected to the positive terminal of the battery, the circuit is connected, and the cigarette lighter electric heating coil starts to generate heat. After heating for more than ten seconds, the electric heating coil becomes hot and red. When the temperature reaches about 180°C, the bimetal piece connected to the coil will heat up and deform outward until the No. 2 slot (outer ring of the electric heating coil) is released. At this time, the plug The spring inside will rebound the positive plug of the cigarette lighter (the outer ring of the electric heating coil), and at the same time it will make a clicking sound, and the electric heating coil will stop heating when the power is cut off. Remove the cigarette lighter. The red-hot cigarette lighter can be used by 2-3 people to light cigarettes.
