(1) Henan Zhongke Lianchuang Test Service Co., Ltd Test conclusion: Philips UV-C Disinfection air unit(UVCA200)was operated for 60min and 120min respectively in the 80m³ test chamber, and the killing rate of natural bacteria in the air was ≥95% in each test which met the requirement of WS/T648-2019 "General hygienic requirement for air disinfecting machine"