Steam Food Vacuum Cooler Brief Description The technology is based on the phenomenon that water starts boiling at lower temperature as the pressure decreases. In the vacuum cooler the pressure is reduced to a level where water starts boiling.The boiling process takes away heat from the food. As an effect, food can be cooled down through reduced the pressure in the vacuum chamber. In this way, cooked food can be cooled down from high temperature to about 10℃ within 20~30min, the baked food can be cooled down from high temperature to 20℃ to suitable packaged within 10-20min.