System Design of Microcrystal Freezing Sleeping Equipment and Research on Effect of Foie Gras Fast Cooling Equipment

Abstract

The purpose of this paper is to design the heat exchanger copper tube in the microcrystalline freezing sleeping equipment system and explore the freezing effect of the foie gras fast cooling equipment. By using SOLID WORKS 2021 to design the heat exchanger of the copper tube, it is applied to the microcrystalline freezing sleeping equipment. Exploring the cooling time of microcrystal freezing sleeping equipment and freezing refrigerator; The extraction rate of foie gras juice at different temperatures after being treated by microcrystalline freezing equipment was investigated, and the optimum freezing temperature was obtained. Compare the juice leaching rate, cooked meat loss rate, color difference, shear force physicochemical properties of foie gras  after different treatment methods. The results show that it takes 12.5 min for the body temperature to reach -18℃ by using the frozen sleeping equipment, which is better than 240 min in the refrigerator. When the temperature of the instrument is set at -20℃, the juice leaching rate is the least. There was no significant difference in the cooking loss rate and SAP leaching rate between the treatment group and the liquid nitrogen treatment group. There was no significant difference in color difference among the three freezing groups. There was no significant difference between the tenderness of foie gras treated by microcrystalline freezing device and that of fresh meat group. Thus, the feasibility of changing the copper tube of heat exchanger to improve the efficiency of the equipment is verified, which provides a theoretical basis for the comprehensive utilization of the rapid cooling equipment in the future.