The present invention relates to an anti-freezing apparatus for a vaporizer of a smokescreen and fog sterilizer for disinfection, which comprises: a vaporizer (100) and a vaporizer main body (100a) having an air valve (120) installed therein, receiving air and chemicals to change the same into a mixed gas form, and supplying the same to a combustion chamber (400)； an anti-freezing pipe (200) in which a rear end thereof is coupled to a front end of the vaporizer (100), a cap (210) installed with an air nipple (211) and an air nozzle (212) is coupled to a front end thereof, and a heat supply pipe (220) is formed at a side surface thereof； a connection pipe (230) and a rubber pipe (240) sequentially coupled to the heat supply pipe (220) of the anti-freezing pipe (200) to supply heat of a heat distribution pipe (300) to the anti-freezing pipe (200)； and a heat distribution pipe (300) having a front end thereof coupled to a rear end of the rubber pipe (240), and a rear end thereof installed at a side portion of the combustion chamber (400) to supply the air heated by heat of the combustion chamber (400) to the anti-freezing pipe (200) through the rubber pipe (240) and the connection pipe (230). According to the present invention, a dew condensation of an air valve is prevented by introducing warm air into the vaporizer when a smokescreen and fog sterilizer is used in winter, and the vaporizer is not frozen but driven even in winder by preventing a phenomenon of freezing and blocking the air valve due to moisture and residue by the dew condensation so the sterilizer can be used all through the year, and can be utilized for spraying fungi-insecticide for agricultural and horticultural crops of a vinyl greenhouse in winder.COPYRIGHT KIPO 2018본 발명은 방역용 연막,연무 소독기의 기화기 결빙 방지 장치에 관한 것으로서, 더욱 상세하게는 내부에 에어밸브(120)가 설치되고 공기와 약제를 공급받아 혼합가스 형태로 만들어서 연소실(400)로 공급해주는 기화기(100) 및 기화기본체(100a)； 기화기(100)의 전단에 후단이 결합하고 전단에는 에어니플(211)과 에어노즐(212)이 설치된 마개(210)가 결합하며 측면에는 열기공급관(220)이 형성된 결빙방지관(2
