In order to shorten the refrigeration time of the beverage machine, improve the cold storage capacity, reduce the loss of energy, and improve the performance of the device. From the perspective of food safety, aluminum was selected as the cold storage material, and a spiral tube heat exchanger was used to simulate the cold storage process theoretically, and a set of economical and reasonable energy storage equipment was designed. By establishing the physical and mathematical model of the cold storage device, and using ANSYS Workbench to simulate the heat transfer process, the final water pipe outlet temperature obtained by the simulation is 2 °C, which meets the requirements of the normal outlet ideal temperature below 10 °C and the effect is good, and achieves the expected goal. Theoretically the feasibility of the device was confirmed.