Simulation And Optimization Design Of The Drying And Ozone Decomposition System In A Sterilizer

Sterilizer have become one of the commonly used household appliances.The sales volume of domestic household sterilizer in the Chinese market is about 5 million units each year.However,the sterilizer generates lots of ozone during use and leaks into the surrounding air.Therefore,in order to reduce the ozone leakage and speed up the drying of the dishes,this thesis carries out optimization design around the temperature field and flow field of the sterilizer.In the optimization process,the homogeneity of the two fields is first considered.Increasing the uniformity of the field distribution helps to reduce the ozone content and increase the drying speed of the cutlery.In the research of this paper,on the basis of fluid mechanics,heat transfer and finite element theory,based on the innovative design of the space structure of the sterilizer,the computational fluid dynamics(CFD)simulation model of the drying system was established,and the sterilizer was analyzed.The homogeneity of the distribution of the flow field and the temperature field in the medium and then using the above theoretical basis and experiments to verify the model,from the verified results,the theoretical calculation and experimental results are roughly the same,the deviation between the two is less than 8%.Based on the experimental verification of the simulation model,the optimization of the space structure of the disinfection cabinet was carried out,and the optimal design model of the disinfection cabinet space structure was proposed to improve the temperature distribution and flow field distribution uniformity in the chamber.It can be known from the verification results that the temperature in the sterilizer is unevenly distributed,the temperature in the upper part of the cavity is high,the temperature in the middle of the cavity is approximately the same,and the distribution of temperature field and flow field in the cavity is not uniform.The sterilizer that has been optimized and designed not only has passed the experimental verification,but also has been put into the market as a certain model of BSH household appliances.The innovative research results are as follows:In the combined sterilizer,the heat source in the sterilizing cabinet is mainly a light wave tube.In the heating process,the hot air will quickly move to the upper part of the cavity,so the upper part of the cavity has a higher temperature,and the temperature field is not affected by the lateral flow of the fluid.The influence of the movement,so on this basis,the innovative design of the geometric shape and spatial structure of the optical tube and drying duct,the use of larger thermal energy conversion rate,so that hot air convection,thus speeding up the hot air flow rate,heat exchange Acceleration,so that the temperature in the cavity reaches a certain degree of uniformity.As a result,the drying effect is enhanced and the decomposition of ozone is accelerated.In sporadically sterilizers,because there is no high temperature,the decomposition rate of ozone is slow.Spraying the organic ceramic on the surface of the grid can increase the local temperature and accelerate the decomposition of ozone.Simulations and experiments in this article have added concrete cutlery as considerations to make the research results more practical.Through the above analysis,optimizing the internal and external circulation of the sterilizing cabinet at the same time has a significant effect on improving the distribution uniformity of the temperature field and the flow field in the sterilizing cabinet,thereby obtaining an optimization solution of the sterilizing cabinet drying system and the ozone decomposition system.