The application of tungsten wire in automobile defogger glass is mainly reflected in the defogger heating system of rearview mirror and rear windshield, which achieves rapid heating defoggering through its high resistance and high heat resistance, improving driving safety.
1. The role of tungsten wire in automobile defogger glass:
Tungsten wire is used as a heating wire, embedded or printed on the rear windshield of the car, and is used to heat the glass surface to remove fog, frost or ice and snow.
By generating heat through electricity, tungsten wire raises the temperature of the glass surface, evaporates condensed water vapor or melts frost, thereby keeping the glass transparent and improving driving safety.
2. Working principle of tungsten wire in automobile defogger glass:
Resistance heating: Tungsten wire has high resistance characteristics. When current passes through, it will generate Joule heat (Q = I2Rt) and quickly heat the glass.
Tungsten wire is usually printed in the inner layer of glass (commonly used in laminated glass or directly printed on the glass surface) in the form of thin strips or grids to form a uniform heating area.
The car's defog system uses the vehicle's power supply (usually 12V DC) to power the tungsten wire, and cooperates with switches or automatic control systems (such as timers or temperature sensors) to achieve efficient defog.
3. Advantages of tungsten wire in automotive defog glass:
High melting point: Tungsten has an extremely high melting point (about 3422°C), is resistant to high temperatures, and is suitable for long-term use in environments with repeated heating and cooling.
High resistance: Tungsten wire has a high resistivity and can effectively convert electrical energy into thermal energy.
Corrosion resistance: Tungsten wire has good chemical stability and can resist oxidation or corrosion in humid environments.
Small and efficient: Tungsten wire can be made into very thin lines, which will not affect the line of sight after being embedded in the glass, while providing sufficient heating power.
