The freeze dryer consists of a refrigeration system, a vacuum system, a heating system, and an electrical instrument control system. The main components of the freeze dryer are a drying oven, a condenser, a refrigeration unit, a vacuum pump, a heating/cooling device, and the like. The working principle of the freeze dryer is to freeze the dried object to below the triple point temperature, and then the solid water (ice) in the article is directly sublimated into water vapor under vacuum conditions, and is removed from the article to make the article dry. .

After the material is pretreated, it is sent to the quick freezing warehouse for freezing, and then sent to the drying chamber for sublimation dehydration, and then packaged in the post-treatment workshop. The vacuum system establishes a low pressure condition for the sublimation drying chamber, the heating system provides sublimation latent heat to the material, and the refrigeration system provides the required cooling capacity to the cold trap and the drying chamber. The equipment adopts high-efficiency radiant heating, and the material is evenly heated;

The freeze dryer adopts high-efficiency water trap and can realize rapid defrosting; adopts high-efficiency vacuum unit and can realize oil-water separation; adopts parallel centralized refrigeration system, multi-channel cooling on demand, stable working condition and energy saving; freeze dryer It adopts artificial intelligence control, with high control precision and convenient operation.

Freeze dryers have a wide range of applications in the fields of bioengineering, pharmaceutical industry, food industry, materials science and deep processing of agricultural and sideline products. The freeze dryer is suitable for drying high-grade raw materials, Chinese herbal medicines, biological, wild vegetables, dehydrated vegetables, food, fruits, chemicals, pharmaceutical intermediates and other materials.
The freeze dryer uses the natural wet state of the adsorbent at an early stage, and it is necessary to gradually regenerate and purify the adsorption activity after repeated steps. After using for a period of time, under the action of pressure, the packing density of the adsorbent will increase, and the appropriate conditions according to the adsorbent are added.
The muffler of the freeze dryer is regularly maintained to remove various impurities on the adsorption surface in time to avoid affecting the noise elimination effect and affecting the source of the gas. Adjust the opening of the throttle valve according to the early dew point. Filled with adsorption dryers on the filter configuration for a long time running exhaust quality has a great relationship, in the process of system configuration, must be different according to the professional requirements of the precision filter. To use the freeze dryer according to the specifications, the ratings within the permissible range are used in various parameters.
working principle
The so-called vacuum drying is to dry the material under vacuum and heat it. If using a vacuum pump for pumping and dehumidifying, speed up
The drying speed.
Note: If using a condenser. The solvent in the material can be recovered by a condenser. If the solvent is water, the condenser can be omitted, saving energy investment.
Performance characteristics
◎The boiling point of the material solution under vacuum is reduced. Increase the heat transfer driving force of the evaporator. Therefore, the heat transfer area of the evaporator can be saved for a certain amount of heat transfer.
◎ The heat source for the evaporation operation may use low pressure steam or waste heat steam.
◎The evaporator has less heat loss.
◎ It can be disinfected before drying. There is no impurity in the drying process, which meets GMP requirements.
◎ is a static vacuum dryer. Therefore, the shape of the dried material will not be damaged.
Massalfa freeze dryer includes: laboratory N series vacuum freeze dryer, bell ND series vacuum freeze dryer, in-situ ND series drug development vacuum freeze drying, F series small production, pilot production, and freeze-drying area is greater than 2 square meters production vacuum freeze dryer, five categories of vacuum freeze dryer. More than 50 models can meet any user needs. Applications: physics, biology, medicine, chemistry, pathology, pharmaceutics, bacteriology, virology, zoology, forensic identification, food health products, archaeology, print, geology.

The vacuum freeze dryer (referred to as the freeze dryer) works by freezing the water content of the object into a solid in a vacuum low temperature environment, and then sublimating the water from the solid state into a gaseous state, thereby obtaining a dry, green and lyophilized product.

Massalfa is a professional manufacturer of vacuum freeze dryers (freeze dryers) at home and abroad. It not only has leading technology at home and abroad, but also has good after-sales service and high-quality freeze dryer solutions. Massalfa can be divided into laboratory freeze dryer, pilot freeze dryer and production freeze dryer according to the application.

1. Introduction of laboratory freeze dryer and laboratory freeze dryer:

Laboratory freeze dryers are mainly used in colleges and universities, research laboratories, etc., with the characteristics of precision, simplicity, flexibility and flexibility. A variety of specifications and configurations to meet the routine freeze-drying requirements of most laboratories.

Tianfeng laboratory lyophilizer device can be selected: common type, gland type, multi-manifold common type, multi-manifold gland type, T-frame, in-situ type.

Ordinary freeze-drying machine: The material is bulk-packed in the material tray and is suitable for lyophilization of food, Chinese herbal medicine and powder materials.

Gland type freeze-drying machine: suitable for the drying of the bottled materials of Xilin. When preparing for lyophilization, the materials are packed into the vials as needed, floated and capped, and then freeze-dried. After drying, the capping mechanism is pressed to compact the bottle. The cover can avoid secondary pollution, re-adsorb moisture, and is easy to store for a long time.

Multi-manifold type (ordinary type) lyophilizer: The flask is attached to the outside of the drying chamber, and the material frozen on the inner wall of the bottle is dried. At this time, the flask is connected as a container to the manifold outside the drying box, and the material in the flask By heating at room temperature, the multi-manifold switch unit can be used to remove or load the flask as needed without stopping the machine.

Multi-manifold type (T-frame) lyophilizer: Suitable for ampoules. For the preservation of microbial strains such as bacteria and fungi, the laboratory often uses an ampoule storage method. The sample was freeze-dried and packaged in a small ampoule. It has the advantages of long preservation period, small variation, convenient for large-scale preservation and wide application range.

Multi-tube gland type freeze-drying machine: combines the characteristics of gland type freeze dryer and multi-tube type freeze dryer.

Main features of Vacuum freeze dryer:

■ Imported fully enclosed refrigeration unit with low temperature and strong water catching capacity;

■ Cooling by air cooling, no water cooling required;

■ Vacuum connection adopts international common standard parts, easy to disassemble and install, and reliable sealing performance;

■ The temperature of the cold trap and the vacuum of the sample are all displayed by LED digital display, which is concise and clear;

■ The specially designed touch soft key can quickly and accurately realize the function setting, which is easy and convenient to operate;

■ Transparent bell-type drying room, natural heating, safe and intuitive;

■ Specially designed stainless steel sample holder, the common sample tray spacing is adjustable, and the number of layers is freely set;

■ Stainless steel cold trap and countertop, clean and hygienic, beautiful and corrosion resistant.