The present application provides a food
vacuum cooling method and a food
vacuum cooling device capable of further shortening the
operation time. In the food
vacuum cooling method and the food vacuum cooling device of the present application, a
vacuum chamber is composed of a positive chamber, a
decompression chamber connected to the positive chamber and including at least an outer chamber and an inner chamber, and a re-compression chamber including one or more chambers. The outer chamber of the
decompression chamber is prepared to be decompressed from the
atmospheric pressure to a specified pressure, and the inner chamber of the
decompression chamber is prepared to be decompressed from the specified pressure decompressed in the outer chamber of the decompression chamber to a pressure required for cooling. The food moved into the positive chamber through the decompression chamber is cooled for a specified time in the positive chamber maintaining the vacuum degree required for cooling, and then moved out through the re-compression chamber. The opening and closing of the
doors in each chamber, the decompression of the chamber requiring decompression, the
pressure increase of the chamber requiring
pressure increase, and the food conveying are performed so that the operation in each chamber is completed within the allowable
processing time calculated in advance based on the specified
cooling time.