The invention discloses an oval elbow cold storage phase change material device and relates to the technical field of cold accumulation air conditioners. The oval elbow cold accumulation phase changematerial device comprises a shell, two end covers, an even number of separation plates and a plurality of oval pipes; the first side edges of the separation plates are fixed on the inner side wall ofthe shell, the second side edges of every two adjacent separation plates are fixedly connected, a sector-shaped region is formed between every two adjacent separation plates, an oval pipe is arrangedin each sector-shaped region, a plurality of ribs are arranged on the outer side wall of each oval pipe, the two ends of the oval pipes penetrate through the end covers to communicate with the outside, every two adjacent oval pipes communicate through a connecting pipe at one end, which extends out of the same end cover, the oval pipes and the connecting pipes are used for bearing a cold-carryingfluid, and a phase-change cold storage medium fills between the shell and the oval pipes. According to the oval elbow cold storage phase change material device, the heat exchange efficiency of a refrigeration system can be improved, the energy utilization efficiency can be improved, high-capacity and high-efficiency targets are achieved, the cold accumulation effect is greatly improved, and the effective utilization rate of the cold storage device is improved.