Welcome to the official website of Labtex Biotech China Co., Ltd.

Tel: +8615666779750  Email: info@labtex.cn

1

NEWS

Freeze dryer structure

图片名称
图片名称

The vacuum freeze dryer consists of a drying oven, a refrigeration system vacuum system, a media heat exchange cycle system, an automatic control system, a pneumatic system, and an in-place cleaning and disinfection system.
drying oven
The drying box is a vacuum-tight low-pressure container. All materials are made of stainless steel, which can withstand positive and negative pressures and meet the requirements of steam sterilization. The seal is made of high-temperature-resistant and low-temperature-resistant silicone rubber. The insulation layer is made of closed-cell elastic heat-insulating materials.
1) Box body: a rectangular box body with high space utilization rate is adopted, the bottom is provided with a drain port, and an observation window is opened on the side. Spray inlet fitting.
2) Shelf: The energy required for cooling and heating food is transmitted to the shelf through the heat exchange medium, and then to the food. The shelf adopts special hollow plywood, which has high strength and good sealing. The shelf assembly is installed in the freeze-drying box through a bracket, and a board layer should be installed on the top layer as a heat radiation compensation board to ensure that the food space in the box is in the same temperature environment. In addition, both sides and the back of the shelf are equipped with Stop rails to keep food pans or food off the shelves.
3) Box door: adopt cylinder automatic locking device. Ensure the required vacuum degree during the decompression process inside the box. When the vacuum pump is working, the thousand-box butterfly room is opened. The air and water vapor in the vacuum drying room pass through the water catcher to capture the water and then enter the vacuum pump. The exhaust port of the vacuum pump is discharged into the system. To prevent the smoke in the exhaust gas from polluting the indoor environment. In order to prevent water vapor from entering the pump, the system is equipped with a gas ballast valve, which is opened during the drying process.
Media Heat Exchange Cycle System
The energy required for food cooling and heating is driven by the circulating pump and transferred to the shelf through the heat exchange medium, and then to the food. The cold source for food cooling is provided by the refrigeration system, and the heat source for food heating is provided by the heating tank. The switching between cooling and heating is completed by controlling the electromagnetic valve switch of the cold source and heat source. When the temperature rises, the steam enters the heating tank to heat the medium, and the pneumatic three-way regulating valve is used to adjust the mixing ratio of the heat medium from the heating tank and the shelf return heat medium, and control the opening and closing of the cooling water solenoid valve of the plate heat exchanger to control the shelf temperature. The system includes heat medium heating tank plate heat exchanger, pneumatic control valve, cooling water solenoid valve, circulation pump, pipeline, solenoid valve, temperature sensor, etc.
Automatic Control System
It has the functions of freeze-drying curve setting, vacuum pump test and control, medium temperature, food temperature water trap temperature control, drying state detection, road removal, cleaning and sterilization in place, automatic protection and alarm, etc.
Pneumatic system
control pneumatic valve
CIP system
For cleaning and steam sanitizing of dry box water traps

Search
%{tishi_zhanwei}%