PROBLEM TO BE SOLVED: To provide a low-temperature-steam formaldehyde sterilization device using a water seal-type vacuum pump, which prevents the dissolution of formaldehyde into seal water, and does not require a large amount of water for formaldehyde dilution, leading to reduced running cost.SOLUTION: A low-temperature-steam formaldehyde sterilization device has a sterilization tank 2 in which a material to be sterilized is stored, a water seal-type vacuum pump 3 that sucks and discharges a gas in the sterilization tank 2 to the external, and a catalyst reactor 6 that is provided in an exhaust path 9 from the sterilization tank 2 to the vacuum pump 3 and decomposes formaldehyde. Preferably, changing the course of the exhaust path 9 can change the manner of discharge of the gas in the sterilization tank 2, that is, whether it is discharged via the catalyst reactor 6 or not via the catalyst reactor 6.SELECTED DRAWING: Figure 1【課題】水封式の真空ポンプを用いた低温蒸気ホルムアルデヒド滅菌装置において、封水へのホルムアルデヒドの溶込みを防止すると共に、ホルムアルデヒド希釈用の多量の水を不要としてランニングコストを低減する。【解決手段】滅菌物が収容される滅菌槽2と、この滅菌槽2内の気体を外部へ吸引排出する水封式の真空ポンプ3と、滅菌槽2から真空ポンプ3への排気路9に設けられ、ホルムアルデヒドを分解する触媒反応器6とを備える。排気路9の流路変更により、滅菌槽2内の気体を、触媒反応器6を介して排出するか、触媒反応器6を介さずに排出するかを切替可能とするのが好ましい。【選択図】図1
