Objective In order to improve the preservation quality and prolong the shelf life of flowering cabbage, a kind of display cabinet with cyclic air curtain semiconductor refrigeration was designed.

Method The display cabinet was taken as the display object, a heat load model based on internal and external heat transfer of the cabinet was established, and the fresh-keeping effect of the display cabinet with cyclic air curtain semiconductor refrigeration was verified by experiments.

Result After 27 h of display, mass loss rates of three display modes (display cabinet with cyclic air curtain semiconductor refrigeration, open display cabinet and room temperature display) were 9.3%, 20.6% and 34.8%, respectively. The good vegetable rates were 35.8%, 0 and 0, respectively. And the sensory evaluation scores were 2.17, 1.08, 0, respectively. The SPAD values of the three display modes varied between 46 and 54. The mass loss rate of flowering cabbage with cyclic air curtain display cabinet was significantly lower than that of the other two modes after 3 h of display. After 6 h of display, the good vegetable rate and sensory evaluation score were significantly higher than those of the other two modes.

Conclusion With the flowering cabbage as display object in display cabinet, a heat load model based on internal and external heat transfer of the cabinet is established, and the display cabinet with cyclic air curtain semiconductor refrigeration has a good fresh-keeping effect on flowering cabbage.