Core Viewpoint - The article emphasizes the importance of cleaning air conditioning units before use to prevent health issues caused by accumulated dust and microorganisms [2][4][18] Group 1: Health Risks - Long periods of inactivity or poor indoor air quality can lead to significant dust accumulation in air conditioning units, fostering microbial growth that can adversely affect human health [2][4] - Microorganisms from unclean air conditioning systems can spread into indoor air, potentially causing skin allergies, asthma, pneumonia, and other diseases [2][3][4] - There have been numerous reports of severe health incidents related to air conditioning, prompting government attention and regulation [4] Group 2: Cleaning Importance - The hygiene status of air conditioning systems has a substantial impact on health, necessitating regular maintenance and cleaning by users to prevent disease [4][18] - A dirty air conditioning filter can harbor a significant amount of dust and microorganisms, which can be harmful when the unit is turned on [5][7] Group 3: Cleaning Procedures - Recommended cleaning steps include turning off the power, removing the filter, washing it with a specialized cleaning agent, and allowing it to dry naturally [8][10][12] - Experimental results indicate that using disinfectant solutions for cleaning air conditioning filters can significantly reduce bacterial counts, achieving undetectable levels [14] Group 4: Additional Recommendations - It is advised to maintain proper ventilation by opening windows while using air conditioning to improve air exchange and avoid prolonged closure [17] - Vehicle air conditioning systems also require regular maintenance and filter replacement to ensure cleanliness [17][18]

Group 1 - The peak season for air conditioning usage has begun, and health experts recommend thorough cleaning before reactivation to prevent the spread of germs [1] - For home air conditioning cleaning, it is essential to turn off the power and unplug the unit before starting [2] - Cleaning the air filter involves removing it, rinsing the back side with water, and allowing it to dry in a shaded area [4] Group 2 - The evaporator can be cleaned using a specialized cleaning agent, but care must be taken to avoid spraying other parts to prevent short circuits [4] - After cleaning, the dry filter and panel should be reinstalled, and the unit should run for 20 to 30 minutes to flush out any remaining water [6] - For vehicle air conditioning systems, cleaning is recommended every six months to a year, or more frequently in poor environmental conditions [8] Group 3 - Cleaning the air conditioning filter in vehicles involves removing it and using a brush or blower to eliminate dust and debris, with replacement recommended if excessively dirty [8] - The air conditioning ducts require a specialized cleaning agent, which should be applied according to product instructions [8] - Cleaning the evaporator is complex and may require professional assistance for those without experience [10]