Combined phase change cold storage fresh air device

The invention relates to the technical field of fresh air systems, and discloses a combined phase change cold storage fresh air device which comprises a machine body structure, the machine body structure comprises a mounting seat, a cold storage box and a filter box are arranged at the top of the mounting seat, and an air inlet is fixedly formed in the left side of the cold storage box. According to the combined type phase change cold storage fresh air device, when the filter box needs to be independently maintained and disassembled after the fresh air device works for a long time, only the connected fixing assemblies need to be separated, then two connecting plates are moved, a first cover plate is lifted, then the filter box is driven to move through the connecting plates, and the filter box is smoothly taken down; the filter box is independently disassembled, the whole fresh air device does not need to be disassembled, and when reinstallation and connection are needed after maintenance is completed, after