PROBLEM TO BE SOLVED: To provide a vacuum impregnation device enabling liquid flavor components or seasoning to be uniformly applied to food material without damaging the food material. SOLUTION: The vacuum impregnation device is provided with a treatment tank 1 housing food material 6, a pressure reducing means 2 reducing pressure in a treatment tank 1, a pressure recovering means 3 recovering the reduced pressure in the pressure-reduced treatment tank 1, and a liquid supply means 8 supplying impregnation liquid 7 into the treatment tank 1 when recovering the pressure by the pressure recovering means 3. The pressure recovering means 3 is provided with a pressure recovery line 14 making the inside and the outside of the treatment tank 1 communicate with each other, and an openable pressure recovery operation valve 16 installed on the pressure recovery line 14. The liquid supply means 8 supplies the liquid 7 which is added to the food material 6 or with which the food material 6 is impregnated, to the inside of the treatment tank 1 dropwise or in mist. The impregnation liquid 7 from the liquid supply means 8 is supplied into the treatment tank 1 via the pressure recovery line 14 utilizing the difference in pressure between the inside and the outside of the treatment tank 1 when the open air is put into the treatment tank 1 via the pressure recovery line 14. COPYRIGHT: (C)2007,JPO&INPIT
