Germicidal Efficacy of YKX/Y-Type Medical Air Disinfector:An Experimental Observation

OBJECTIVE To study the disinfection effect of YKX/Y medical air disinfector. METHODS The level of noise,the volume of circulating ventilation,UV intensity and leak of O 3 after the operation were determined. In the airtight room with controlled temperature and humidity,the concentration of O 3 was determined at different disinfection time. Two rooms with the same characteristics were selected to conduct the spot sterilization and spot-simulative sterilization experiment. RESULTS The results showed that under normal temperature there was no O 3 determined,and no UV leak after disinfection for 30,60,120 and 240 min. The volume of circulating ventilation was 1 510.2 m 3/h and the highest level of noise,63 dB(A). In 20 m 3 room,under the conditions of 20-22℃ and 65-70% relative humidity,disinfection for 30 min could eliminate 99.93% of Staphylococcus aureus ,And in 120 m 3 room,under the condition of 22-25℃ and 60-68% relative humidity,disinfection for 2 h could eliminate 93.13% of natural bacteria,with 67 CFU/m 3 bacteria remaining in air after disinfection. CONCLUSIONS YKX/Y medical air disinfector is appropriate to conduct routine air disinfection in the wards and clinic in the hospital with or without workers in it.