Study On The Design Of Food Sterilization And Preservation Device

Food thawing plays an important role in modern people's diet and life.Refrigeration technology plays an important role in the quality of food and thawing technology also closely related to the quality of food.Food processing enterprises,hotels and catering industry often process pre thawing and fast thawing according to the actual requirements of frozen food;due to the thawing time and kinds of food are unpredictable,causing a series of problems to the production and consumption of food processing enterprises in the catering industry.The results show that there are some defects and deficiencies in the previous defrost modes.For example,in the electrolytic unfreezing process,the surface of frozen food is firstly begun to thaw leading to the formation of thin water layer so that the heat will not be emitted easily and the heat will go on accumulating in the surface of the food,resulting overheating,and hinder the penetration of electromagnetic radiation into the internal of the food.Therefore,it is necessary to design a multifunctional food thawing and sterilizing device and it has the most important practical significance for the development and popularization of the modern food defrosting equipment.The various food freezing thawing mechanism was studied,the characteristics of microwave thawing were analyzed and summarized.And the far infrared thawing technology was also in-depth understanding.In view of the deficiency in the process of thawing and the needs of actual production and life,a multifunctional device for defrosting,sterilizing and preserving food was designed,and an experimental prototype was made.The prototype has five functions which are pre thawing,rapid thawing,microwave oven,baking and sterilization.In this paper,the design scheme of the control system,the design scheme of the structure,the design of the electrical schematic diagram,the design of the system hardware circuit and the software designwere presented.STM32F103VET6 microcontroller was the core of the control system,by collecting food temperature,humidity,weight and other relevant informations and based on the analysis of a large number of experimental data,the thawing,food heating and food baking laws of various frozen foods were summarized,and the control algorithm was calculated.The design of the food thawing sterilization device has the advantages of reliable structure,strong function,stable performance,and can achieve the food pre thawing,quick freezing,heating,baking and sterilization process.It can meet the hotel,catering industry and food processing enterprises' demands and has a good market prospect and application value.