Ultrasonic freezing equipment and freezing method using same

An ultrasonic freezing equipment, comprising:

• a casing;
• a circulating pump system;
• an ultrasonic generator;
• a vortex-tube freezing device comprising a vortex tube;
• and
• a temperature-measuring device;
• wherein the casing has a cuboid shape;
• a recess is provided inside the casing;
• the recess is of a hexagonal-prism shape;
• the recess is configured as a freezing chamber of the ultrasonic freezing equipment, and is configured to accommodate a salt solution;
• the salt solution is configured to immerse a food to be frozen;
• the circulating pump system is in communication with the recess;
• the circulating pump system is configured to perform a circulating flow of the salt solution in the recess;
• a refrigeration coil is arranged in the recess of the casing;
• the vortex-tube freezing device is connected to the refrigeration coil;
• the vortex-tube freezing device is configured to adjust a temperature of the salt solution through the refrigeration coil, so as to freeze the food to be frozen in the salt solution;
• the ultrasonic generator is configured to emit an ultrasonic wave to the food to be frozen in the salt solution, so as to reduce a damage during a freezing process;
• a control panel is arranged on the casing, and is configured to control a frequency of the ultrasonic generator;
• and
• the temperature-measuring device is arranged at an outer side of the ultrasonic generator, and is configured to measure a temperature of the salt solution.