Effects of Controlled Atmosphere on the Storage Quality and Aroma Compounds of Lemon Fruits Using the Designed Automatic Control Apparatus
Figure 1
Layout diagram (a), control diagram (b) and experimental apparatus (c) of modified atmosphere controlled test box. ((a) where 1, 7, 16, 23: extracting ethylene; 2, 8: backing to gas; 3, 9: N2+O2+CO2; 4, 10: ozone; 5, 11, 14, 21: taking out the gas; 13, 20: exhausting gas; 15, 22: recovering gas; 17, 24: removing ethylene loop; 18: sensing components and pump; 19: machine of ethylene removal; (a) where 1: Temperature sensor; 2: oxygen sensor; 3: carbon dioxide sensor; 4: nitrogen sensor; 5: ethylene sensor; 6: humidity sensor; 7: analog module; 8: touch screen; 9: program mablelogic controller (PLC); 10: valve assembly; 11: nitrogen generator; 12: oxygen generator; 13: humidifier; 14: ozone sterilization machine; 15: CO2 gas source; 16: ethylene removal machine; 17: relay).