The air conditioner contains an electrolysis module. When air flows through, the module operates to produce free radicals and hydrogen peroxide sterilizing agents, instantly killing bacteria and viruses in the air. Using a “belt” structure, the module increases the contact area between air and active substances, improving purification efficiency. It can provide air purification from small household units to large central air conditioning systems, offering comprehensive, green, and efficient disinfection solutions. This technology is a key approach to improving indoor air quality and safeguarding health.