PROBLEM TO BE SOLVED: To provide an air purifying device capable of preventing deterioration in disinfecting performance of a medium performance filter on a downstream side by enabling a bactericide solution to come in gas-liquid contact with bacteria in air and by performing disinfection, and preventing pressure loss of the medium performance filter due to wet.SOLUTION: An air purifying device includes: a housing 50 having an air passage 52 through which air to be disinfected flows from upstream to downstream a spray device 53 which sprays a bactericide solution containing a slightly acidic hypochlorous acid solution as a stock solution into the air to be disinfected which flows through the air passage 50 a circulation reservoir 54 for receiving the bactericide solution falling from the air passage 50 a circulation system 55 for supplying to the spray device 53 the bactericide solution of the circulation reservoir 54 and a medium performance filter 505 arranged in the passage so as to cross the air to be disinfected on the downstream side of the spray device 54.COPYRIGHT: (C)2014,JPO&INPIT【課題】殺菌剤溶液が空気中において菌と気液接触して殺菌を行なうとともに除塵することで、下流側の中性能フィルタの除菌能力の劣化を抑制し、かつ中性能フィルタが濡れて圧力損失が発生することを防止する空気清浄装置を提供する。【解決手段】除菌対象空気が上流側から下流側に流れる通気路52を有するハウジング50と、通気路50を流れる除菌対象空気に微酸性次亜塩素酸水を原液とする殺菌剤溶液を噴霧する噴霧装置53と、通気路50から降下する殺菌剤溶液を受け止める循環槽54と、循環槽54の殺菌剤溶液を噴霧装置53に供給する循環系55と、噴霧装置54の下流側において通気路中に除菌対象空気の空気流を横切って配置する中性能フィルタ505を備える。【選択図】図1
