Food freeze dryer is a kind of equipment that removes water from food through freeze-drying technology, so as to extend the shelf life of food and maintain the original quality of food. In recent years, with the improvement of people's requirements for food safety and preservation, food freeze dryers have been widely used at home and abroad. This article will introduce the working principle, classification, characteristics, application scenarios and development trends of food freeze dryers.
First, the working principle of the food freeze dryer.
The main working principle of the food freeze dryer is to freeze the food at low temperature, and then remove the moisture from the solid state to the gaseous state directly by sublimation drying. In the freeze-drying process, the food is quickly frozen, the moisture forms solid ice crystals, and then the ice crystals are sublimated into water vapor and discharged by sublimation drying in a vacuum environment. Since there is no presence of liquid water during sublimation drying, there is no damage to the shape, structure and nutritional content of the food.
Second, the classification of food freeze dryers.
Food freeze dryers can be divided into many types according to their different structures and functions. According to the size of production capacity, it can be divided into laboratory type, pilot type and production type; According to the lyophilization method, it can be divided into ordinary lyophilization and tunnel lyophilization; According to the heating method, it can be divided into electric hot plate heating and radiant heating. Different types of food freeze dryers are suitable for different production scales and processing needs.
3. Characteristics of food freeze dryer.
Food freeze dryers have many advantages. First of all, freeze-drying technology can better maintain the original quality and taste of food, because the sublimation drying process does not involve high temperature or chemical treatment, and will not destroy the cell structure and nutrients of food. Secondly, freeze-drying technology can remove most of the water in food, thereby significantly extending the shelf life of food and improving the preservation effect of food. In addition, the food freeze dryer is simple and convenient to operate, easy to automate production, which can improve production efficiency and reduce production costs.
Fourth, the application scenario of food freeze dryer.
Food freeze dryers are widely used in many fields. In the field of agriculture, food freeze dryers can be used for the processing and preservation of vegetables, fruits, meat and other agricultural products; In the pharmaceutical field, it can be used for the preparation of excipients for drugs, drying and preservation of Chinese herbal medicines; In the aerospace field, it can be used to provide astronauts with food for long-term preservation; In the field of catering, it can be used to make high-quality ready-to-eat foods such as coffee, tea, and fruit slices. With the increase in people's demand for high-quality and healthy food, the application prospect of food freeze dryer will be broader.
Fifth, the development trend of food freeze dryers.
In the future, the development of food freeze dryers will mainly focus on the following aspects: first, improve production efficiency and reduce energy consumption to meet the needs of large-scale production; the second is to develop new heating methods and control technologies to improve the freeze-drying effect and product quality; the third is to explore new application fields and product forms to meet the needs of different consumers; The fourth is to strengthen the research on the safety and reliability of the equipment to improve the stability and service life of the equipment.
In short, as an efficient, environmentally friendly and healthy food processing equipment, food freeze dryer will play an increasingly important role in the future development. With the continuous progress of technology and the expansion of application fields, food freeze dryers will better serve human food safety and quality of life.