Abstract: A refrigeration device, a controller thereof, a user access terminal, a mobile terminal, a management terminal and a maintenance data management system. The controller for a refrigeration device includes: a controller input module configured to input and process maintenance data of an associated refrigeration device locally; a controller display module configured to display the maintenance data of the associated refrigeration device and a data processing interface; a controller storage module configured to store the maintenance data of the associated refrigeration device; and a controller data synchronization module configured to upload the maintenance data of the associated refrigeration device from the controller to a server periodically and/or in real time.

Abstract: A safety protection apparatus of elastic-plastic steel structure is disclosed. The apparatus includes an outer protecting layer (4) and buffering assemblies arranged in a layered manner along the vertical direction and fixed within the outer protecting layer (4). Each buffering assembly includes stiffening beams (3) distributed in a layered manner along the horizontal direction and buffer members (2) uniformly bridging between adjacent stiffening beams (3), and each of said buffer members (2) comprises a pair of arc-shaped damping spokes (1). Shock absorbing rubber elements (5) are provided between vertically adjacent stiffening beams (3). The apparatus has high safety, good durability, and it is convenient to be installed and maintained.