What Causes Fogging on Car Windows in Summer?
1 Answers
Summer fogging on car windows is caused by a significant temperature difference between the interior and exterior of the vehicle under current environmental conditions. Solutions for fogging on the outside of the glass when using air conditioning in summer: When the fog is not heavy, you can appropriately open the windows on both sides to allow air convection, which eliminates the temperature difference on both sides of the windshield, making it difficult for fog to form naturally. Alternatively, turning on the air conditioning to blow cold air can quickly eliminate the fog. Methods to solve window fogging under other circumstances: Blowing hot or cold air is a quick solution. Blowing hot air can fundamentally solve the problem of glass fogging, but the fog will return once the hot air is turned off. However, the main issue with blowing hot air is that it takes a long time to see results. Additionally, driving with the heater on consumes a lot of fuel. Anti-fog spray: The principle of anti-fog spray is simple. Spraying a layer on the windshield forms an effective protective film, preventing water vapor from condensing. However, the effectiveness of this protective film is short-lived, requiring frequent reapplication to maintain results. Automatic defogging: For some high-end brands, vehicles come equipped with features to prevent fogging. The air conditioning systems in these models continuously monitor the temperature and humidity inside the vehicle, analyzing the critical temperature for water vapor condensation at any given moment. By comparing these indicators, the system can determine whether the air inside the vehicle will cause fogging on the windshield. If the system detects fogging, the air conditioning system will initiate a series of defogging operations, such as adjusting temperature, airflow direction, air volume, and switching between internal and external circulation.
