The invention discloses a
processing method for freeze-
drying garlic slices by vacuum microwaves, and belongs to the key technical field of garlic
deep processing. The method comprises the following steps of: selecting materials,
cutting off bases, separating flakes, peeling, and
cutting into garlic slices with the thickness of about 2mm, filling 1Kg of garlic slices in a tray, keeping the materials in a freezer at the temperature of -10DEG C for 30 minutes, reducing the temperature to the temperature of between -25 and -30DEG C, and keeping the temperature for 120 minutes; after pre-freezing, filling the materials in a freeze-
drying bin according to a fixed direction and serial numbers, and reducing the temperature of a
cold trap to the temperature of between -35 and -40DEG C in advance;starting a
vacuum pump, and emitting microwaves when the absolute pressure is 50-60Pa, wherein the microwaves are emitted by total 10 magnetrons averagely distributed on the left and right, the switch-on mode is intermittent circulation, and the magnetrons on the left and right are alternately switched on for 20-30 minutes; and
drying for 4 hours, opening the bin, changing the tray, and changing the tray every 2 hours until the drying is finished. The garlic slices prepared by the drying process maintain good quality of common freeze-dried garlic slices, the time of the freeze-drying process is shortened, and
energy consumption is reduced.