Problem to be solved: to realize a vacuum cooling apparatus capable of effectively preventing blowout.Solution: an apparatus for vacuum cooling a food under reduced pressure in the processing tank 2, monitors the bubbles on the food in the processing tank 2 during the depressurization of the processing tank 2, and adjusts the pressure in the processing vessel 2 based on the monitored information. For example, if there is a bubble sensor 7 for monitoring the bubbles formed on the food, and if a predetermined amount of bubbles are generated on the food in the processing tank 2 during the depressurization of the processing tank 2, the pressure in the processing vessel 2 is stopped or loosened or the pressure within the processing tank 2 is reduced by a predetermined amount.Diagram【課題】食品の種類を問わず、吹きこぼれを有効に防止できる真空冷却装置を実現する。【解決手段】処理槽2内を減圧して食品を真空冷却する装置であって、処理槽2内を減圧中、処理槽2内の食品上の泡を監視し、この監視情報に基づき処理槽2内の圧力を調整する。たとえば、食品上に生じる泡を監視する泡センサ7を備え、処理槽2内を減圧中、処理槽2内の食品上に所定以上の泡が生じた場合には、処理槽2内の減圧を停止するか緩めるか、または処理槽2内を所定だけ復圧させる。【選択図】図1
