Study Of Winding Coil Vacuum Drying System

In this paper,the drying mechanism of the electronic expansion valve winding coil is studied and the existing drying process is optimized.A more efficient automatic vacuum drying system is designed and developed.In this paper,the development status of vacuum drying technology at home and abroad is studied.The purpose of vacuum drying and the advantages and disadvantages of traditional winding coil drying process are analyzed.The basic principles and methods of vacuum drying are expounded.On this basis,the paper puts forward the design scheme of the vacuum drying system of winding coil.The system can be divided into four parts: vacuum unit,main control unit,temperature control unit and human-computer interaction unit.The vacuum unit is responsible for the vacuum required for the product to dry.The main control unit to achieve the coordination of various components control to complete the entire vacuum drying process.Temperature control unit is mainly through the PLC's PWM side to control the solid-state relay on-off time to achieve coil temperature control.Human-computer interaction unit is mainly MCGS touch screen selection and software interface design.System software mainly includes PLC software and human-computer interaction software two parts design.Finally,the optimal drying process parameters were obtained by the uniform design of the experimental scheme.The regression results of the experimental results were analyzed by regression analysis.The regression equation and significance of the experimental and experimental indexes were obtained.Experiments show that the entire vacuum system dry rhythm can reach 1.5 hours,compared with the traditional drying method greatly improved efficiency,product quality has also been improved.