关键词: 车内空气污染；高温灭菌；电子控制；客舱负压

Abstract: To address the serious issue of in-vehicle air pollution in the context of China's 336 million registered vehicles, as well as safety risks posed by passengers with respiratory infectious diseases, and to overcome inefficiencies in existing disinfection technologies, this paper proposes a novel engine air intake combustion sterilization electronic control negative pressure device featuring four key modules. Through an electronic control system, this device can extract air from the vehicle cabin whether the engine is running or off, and sterilize it by heating it to a high temperature of 80 ℃ using either the heat from engine combustion or a heating wire, while simultaneously maintaining negative pressure in the cabin to draw in fresh air from outside. In its structure, the check valve inside the air storage tank prevents engine backfire, ensuring cabin safety. This enables the maintenance of negative cabin pressure and efficient sterilization under all operating conditions. Experimental tests have verified the device's high sterilization efficiency and reliable negative pressure control. Compared to existing technologies, this device utilizes electronic control, thus saving installation space and resolving issues of incomplete and unsafe sterilization. It is a win-win solution capable of providing effective sterilization and disinfection while meeting mass consumer affordability.

Key words: air pollution in the car; high-temperature sterilization; electronic control; cabin negative pressure