ZHU Xueru1,2, WANG Jufei1,2, LI Chao1,2, XU Lujiang1, LI Hua1, XU Jialiang1,2
Kitchen waste is composed of complex and diverse ingredients with a variety of organic matter and inorganic salts, which is perishable and foul-smelling under high temperature conditions in summer. To reduce the deterioration rate of kitchen waste in the collection and storage process and cool down the kitchen waste in community residences for short time before treatment,the intelligent temperature-controlled dustbin was designed based on the fan-pad cooling device. Several temperature sensors were distributed inside the dustbin and controlled by Siemens PLC.The execution conditions of the fan-pad cooling device were programmed, and the PID algorithm was used for software optimization, while the data was visualized by touch screen. The intelligent control of the fan-pad cooling system was realized to maintain the internal temperature of the dustbin in the set range,and the system debugging and test verification were conducted. The results show that the detection error of the intelligent temperature control system is less than 0.5 ℃, which meets the accuracy requirements. When the outdoor temperature is as high as 35 ℃, the average temperature in the dustbin can be maintained at about 25 ℃, which meets the constant temperature storage requirements of kitchen waste.