According to an embodiment of the present invention, an apparatus for fumigating chlorine dioxide gas includes: a mode selection unit which outputs a mixed mode signal corresponding to a selected mixed mode among a plurality of modes a controller which outputs a first control signal corresponding to the mixed mode according to the mixed mode signal a power supply unit which supplies a high-concentration mode current during high-concentration mode time and then supplies a low-concentration mode current smaller than the high-concentration mode current during low-concentration mode time longer than the high-concentration mode time according to the first control signal and a gas generation unit which creates chlorine dioxide gas by electrolyzing material solution as the high-concentration mode current and the low-concentration mode current are supplied.COPYRIGHT KIPO 2014본 발명의 실시예에 따른 이산화염소가스 훈증장치는 복수의 모드들 중 선택된 혼합 모드에 해당되는 혼합모드신호를 출력하는 모드 선택부, 혼합모드신호에 따라 혼합 모드에 해당되는 제1 제어신호를 출력하는 콘트롤러, 제1 제어신호에 따라 고농도모드시간 동안 고농도모드전류를 공급한 후 고농도모드시간보다 긴 저농도모드시간동안 고농도모드전류보다 작은 저농도모드전류를 공급하는 전원공급부 및 고농도모드전류 및 저농도모드전류의 공급에 따라 원료 용액을 전기분해하여 이산화염소가스를 생성하는 가스생성부를 포함한다.
