Necessity of cleaning vacuum freeze dryer
The vacuum freeze dryer is composed of refrigeration system, vacuum system, heating system and electrical instrument control system. The main components are drying box, condenser, refrigeration unit, vacuum pump, heating/cooling device, etc. The working principle of vacuum freeze dryer is to freeze the dried goods below the three-phase point temperature, and then sublimate the solid water (ice) in the goods directly into water vapor under the vacuum condition, remove from the articles, and make the goods dry. After pretreatment, the material is frozen in the quick-freezing bin, sublimated and dehydrated in the drying bin, and then packed in the post-treatment workshop. Vacuum system establishes low pressure condition for sublimation drying bin, heating system provides sublimation latent heat for material, refrigeration system provides cooling capacity for cold trap and drying chamber. Vacuum freeze-dryer uses high-efficiency radiation heating, uniform material heating; uses high-efficiency water trap, and can achieve rapid defrosting; uses high-efficiency vacuum unit, and can achieve oil-water separation; uses parallel centralized refrigeration system, multi-channel cooling on demand, stable working conditions, conducive to energy saving; uses artificial intelligence control, control essence. High degree, easy to operate.
The quality requirements of freeze-dried products are as follows: unchanged biological activity, uniform appearance, full shape, firm structure, fast dissolution speed and low residual moisture. In order to obtain high quality products, we should have a comprehensive understanding of the theory and technology of freeze-drying. The freeze-drying process of vacuum freeze dryer includes three stages: pre-freezing, sublimation and re-freeze-drying. Reasonable and effective shortening of freeze-drying cycle has obvious economic value in industrial production.
Vacuum freeze dryer is widely used and its frequency is very high. Therefore, it is very important for enterprises whether the vacuum freeze dryer can be used normally. We all know that automobiles need regular maintenance after a certain distance. The same is true for other mechanical equipment, including vacuum freeze dryer. It is necessary to clean the vacuum freeze dryer.
Vacuum freeze dryer long-term work will bring wear and dust to accessories and other impurities cover the impact of work, let's look at the hazards of vacuum freeze dryer unclean cleaning:
When the evaporator of the vacuum freeze dryer and the condenser of the outdoor machine are covered with dust, it will affect the emission of cold air and heat, which will result in the cooling or heating effect of the vacuum freeze dryer being weakened and the power consumption is time-consuming. When the vacuum freeze dryer is opened, the bacteria in the vacuum freeze dryer will be directly blown into the room. In the air, it causes direct harm to human body. After the vacuum freeze dryer stopped using in summer, the cleaning of vacuum freeze dryer would be neglected, so a large number of dust, mites, pollen, lice and fungi adsorbed on the vacuum freeze dryer vacuum suction network began to multiply. When the vacuum freeze dryer is used again in the second year, these pathogens, viruses, molds and dust are blown out by the dryer, often causing large-scale respiratory infections and allergic dermatitis.
Cleaning method of vacuum freeze dryer:
Vacuum freeze dryer usually needs to be cleaned and maintained before use in summer or after use in autumn. To completely kill the germs in the vacuum freeze dryer, it is best to ask professional technicians to clean it once with a special cleaning solution for the vacuum freeze dryer.