Abstract: A cooler box with a temperature control function, the cooler box comprises a box body and a cryogenic medium container installed outside the cooler box for storing liquid carbon dioxide or other liquefied gas. The box body is equipped with a controller, a monitoring device, a controllable valve, and a chamber to reduce the speed of gas released and thus prevent sudden freezing and overcooling of temperature-sensitive cargo such as fresh food. The controllable valve is connected to the cryogenic medium container through a tube. The monitoring device measures the temperature inside the cooler box, and the controller controls the valve opening state and the duration time of maintaining the open state of the controllable valve according to the temperature measured by the monitoring device and the size of the cooler box. A temperature control method for the cooler box is also provided.

Abstract: A shelf life monitoring system for perishable products of different types comprises a low-temperature display cabinet, a point of sale terminal, and a server, connected through a network. During the storage, the server can determine whether the storage condition required for a perishable product is the same as the storage condition of the low-temperature display cabinet which the perishable product is stored. The server can further determine whether the low-temperature display cabinet is operating normally, and issue alerts as to potential reductions in shelf life of the perishable product when abnormal conditions occur. The server can also periodically check for any life-expired food and notify the point of sale terminal to identify and process a life-expired product in certain ways.

Abstract: A shelf life monitoring system for perishable products of different types comprises a low-temperature display cabinet, a point of sale terminal, and a server, connected through a network. During the storage, the server can determine whether the storage condition required for a perishable product is the same as the storage condition of the low-temperature display cabinet which the perishable product is stored. The server can further determine whether the low-temperature display cabinet is operating normally, and issue alerts as to potential reductions in shelf life of the perishable product when abnormal conditions occur. The server can also periodically check for any life-expired food and notify the point of sale terminal to identify and process a life-expired product in certain ways.