▎ 摘　　要

NOVELTY - The application model claims a carbon dioxide gas detection alarm device, belonging to the artificial ice field construction field, comprising a shell, a control circuit board, an infrared emitting unit and an infrared receiving unit, the infrared emitting unit and the infrared receiving unit are electrically connected with the control circuit board, the inner part of the shell is provided with a hollow cavity, the shell is provided with an air inlet and an exhaust port connected with the cavity, the infrared emitting unit and the infrared receiving unit are connected with the cavity, the infrared emitted by the infrared emitting unit passes through the cavity so as to be received by the infrared receiving unit, the inner part of the cavity is provided with a graphene film, the graphene film is located on the propagation path of the infrared. The application has the effect of judging whether the carbon dioxide refrigerant in the compressor system leaks.