Abstract:In order to alleviate the liquid spatter during vacuum cooling and explore the influence of different conditions on the cooling rate,the control variable method was used to test the quality and temperature changes of the juice during the cooling process by changing the container shape,top material,aperture size,relative loading capacity of materials,and different initial and final temperatures. The ineffective water loss rate and cooling rate under different variables were calculated based on the test results.The study showed that the optimal condition for achieving a high cooling rate and low ineffective water loss was as follows:a rectangular container with a relative load of 23.3%,rigid container top material,and aperture size of 5 mm,as well as a decrease in temperature from 80 ℃to 25 ℃. At this time,the ineffective water loss rate was the lowest,and the cooling rate was the fastest.