Vacuum Freeze Dryer

I. Product Overview

The freeze dryer is a device that uses vacuum freeze-drying technology to dry substances. Its basic principle is to first freeze a water-containing substance into a solid state, and then, through the sublimation principle, make the water sublimate directly from solid to gas, thereby removing water and preserving the substance. Freeze dryers are widely used in pharmaceuticals, biological products, food and other fields, with the advantages of good drying effect, long preservation time and good rehydration.

II. Working Principle

Vacuum freeze-drying is a drying technology that uses the sublimation principle: the material to be dried is rapidly frozen at low temperature, and then, in a suitable vacuum environment, the frozen water molecules sublimate directly into vapor and escape. This process does not cause concentration due to dehydration; the dried product is in a dry sponge-like porous form with essentially unchanged volume, is extremely easy to rehydrate and restore, and maximally prevents physical, chemical and biological deformation of the dried substance.

III. Application Range

1. Pharmaceutical industry: freeze dryers are widely used in the production and preservation of drugs, biological products and medical devices. Through freeze-drying technology, water can be removed, shelf life extended, drug efficacy and biological product activity guaranteed, and transportation and storage facilitated.

2. Food industry: in the food industry, freeze dryers are used for the processing and preservation of fruits, vegetables, meat, aquatic products and condiments. Freeze-drying technology can preserve the original color, aroma and nutritional content of food, extend shelf life, and facilitate carrying and storage.

3. Chemical industry: freeze dryers are used in the chemical industry for the production and preservation of catalysts, chemical raw materials and pigments. By removing water and volatile components, product quality and purity are ensured.

4. Agricultural field: in agriculture, freeze-drying technology is used for the preservation and germination of plant seeds, removing water to extend preservation time and ensure the germination rate of seeds.

5. Other fields: freeze-drying technology is also applied in environmental protection, energy, scientific research and other fields, such as treating waste such as sludge and wastewater, preparing fuel, and conducting material research and preparation.

IV. Product Features

1. Condensation system

(1) Original imported closed compressor for rapid refrigeration and higher efficiency; new high-efficiency environmentally friendly refrigerant, environmentally friendly and fully compliant with national environmental requirements;

(2) Maximum water capture capacity of the cold trap ≥ 3 kg at a working temperature ≤ -60 ℃, with uniform inner wall temperature; the professional gas diversion design enables both efficient freeze-drying and efficient water capture while protecting the vacuum pump;

(3) The cold trap uses external coils with a smooth, unobstructed interior and a sample pre-freezing function, eliminating the need for an ultra-low-temperature refrigerator or liquid nitrogen freezing equipment;

(4) The cold trap is made of 304 stainless steel, highly corrosion-resistant, and its smooth surface facilitates defrosting.

2. Vacuum system

(1) Highly sealed vacuum chamber with an ultimate vacuum of ≤ 10 Pa;

(2) Equipped with a vacuum micro-adjustment ball valve for manual micro-adjustment of the vacuum level;

(3) A customized vacuum generator specially suitable for freeze dryers, with a pumping speed of 2 L/s to rapidly ensure chamber vacuum;

(4) Pirani vacuum gauge for more accurate measurement of chamber pressure, ensuring accurate and valid vacuum values;

(5) Equipped with KF25 quick-release clamps for tight connection between the vacuum pump and the chamber;

(6) Optional vacuum pump oil mist filter to ensure a clean laboratory environment and reduce oil mist pollution.

3. Drying chamber system

(1) Maximum freeze-drying area of 0.19 m² (standard type), material tray size φ200 mm; supports expansion with multi-manifold freeze-drying bottles and round-bottom flasks to further increase the freeze-drying area (equipped with multi-manifold bell jar);

(2) The bell jar is made of highly transparent material, corrosion-resistant and shatterproof, for convenient observation of the sample freeze-drying process;

(3) The drying rack supports a capping function, allowing freeze-drying of samples contained in vials and other containers requiring capping (capping type);

(4) The number of shelf layers is adjustable, allowing appropriate increase or decrease according to sample quantity;

(5) The shelf has a heating function to further resolve the bound water of samples (heating type);

(6) Equipped with a Class A temperature sensor to accurately reflect the temperature throughout the drying chamber.

4. Control system

(1) Uses a 7-inch true-color LCD touch screen with a clear picture and a humanized interactive interface for easier operation;

(2) Clearly displays various temperatures, vacuum levels and running time, allowing users to follow the sample freeze-drying process;

(3) Data is automatically saved, viewable in real time and reproducible historically; data can be exported via USB for further analysis;

(4) Built-in automatic reminder function for compressor equipment and vacuum pump lubrication/maintenance time, proactively reminding users to carry out corresponding maintenance of the vacuum pump and compressor;

(5) Password protection mechanism for convenient device permission management and prevention of misoperation by non-professionals;

(6) Multiple sample protection mechanisms, such as prohibiting the vacuum pump from starting when the cold trap temperature is too high, avoiding sample boiling and damage.

V. Technical Parameters