Abstract: Assembling an electrochemical oxygen control unit and simulating a fruit and vegetable box can achieve an oxygen conversion rate of 80.1 mL/min at a constant current of 22.5 A (50 mA/cm²), and control the oxygen concentration in a 30 L fruit and vegetable box below 15% within 23 minutes, which meets the technical requirements of commercial oxygen control and preservation. After industrial assembly testing by a large household appliance enterprise, the oxygen control unit can achieve long-term operation of over 2000 hours sat a constant current of 80 mA/cm².

Key words: Gas diffusion electrode, Device of controlled atmosphere preservation, Electrochemistry, Oxygen reduction reaction