| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vacuum cooling apparatus that prevents stickiness from generating to keep taste and texture even if cooked crops composed chiefly of starch, such as cooked hot rice, are vacuum cooled. <P>SOLUTION: The vacuum cooling apparatus includes a processing tank 2 holding an object 1 to be cooled; a depressurizing means 3 for depressurizing the inside of the processing tank 2; a pressure recovery means 4 for recovering the pressure within the processing tank 2 being depressurized; a pressure sensor 5 for detecting the pressure within the processing tank 2; a temperature sensor 6 for detecting the temperature of the object 1 of to be cooled; and a control means 7 for varying the depressurizing capability of the depressurizing means 3. Based on the temperature of the object 1 of to be cooled being held in the processing tank 2, the inside of the processing tank 2 is depressurized without the depressurizing capability being limited until a saturated steam pressure P2 corresponding to the temperature is reached. Thereafter, the depressurizing capability is limited until a set pressure P1 or a set temperature T1 is reached. Thereafter, the depressurizing capability is not limited until a desired pressure or a desired temperature is reached. <P>COPYRIGHT: (C)2007,JPO&INPIT |
