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Small freeze dryer manufacturers talk about the automatic control system and sampling device of freeze dryer

Categories：	Textile machine / Weaving machine
Usage：	vacuum freeze drying

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程玉婷

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Description

Small freeze dryer manufacturers talk about the automatic control system and sampling device of freeze dryer
First, the automatic control system of the freeze dryer.
Many freeze dryers have an automatic control system and also have manual control functions, but there are big differences between the manufacturers in the automatic control mode, and the user must figure out.
The automatic control of the so-called freeze dryer should include two parts. First, the equipment of the freeze dryer automatically stops at the specified time according to the freeze-drying process requirements. Second, the temperature of the freeze-drying tank layer is automatically tracked according to the freeze-drying curve requirements. The entire freeze-drying process does not require manual operations, although manual intervention can be performed if desired. However, the automatic control of some freeze dryers is incomplete, only the freeze-drying curve can be automatically tracked, and the rest must be manually operated.
Some lyophilizers can only be controlled automatically until the end of lyophilization. The tampon in the box after the lyophilization is completed, the defrosting of the condenser and the steam sterilization can not be carried out automatically. It requires manual operation, especially the steam disinfection part, because many valves are involved. Control, manual operation is more troublesome, should choose the lyophilizer of the automatic disinfection program.
Some lyophilizers use automatic microcomputers for convenient operation and programming. The displayed language is a freeze-drying language. It also has a fluorescent screen, a printer and a floppy disk. It can store dozens of frozen programs at the same time. Each program content can be displayed. The entire program content can be printed by the printer. The automatic control of the lyophilizer uses a meter, which is troublesome to operate and program, and has less lyophilization procedures that can be stored.
The recording instrument is also an important instrument for the freezer. It can record the entire freeze-dried actual process in a vacuum, so that it can be stored in the future. Most of the recording instruments use a multi-point recorder, which can be used for both point and direct operation. Text records, as well as digital display systems. Users should understand and choose according to the specific situation.
Second, the intermediate sampling device of the freeze dryer, the eutectic point measuring device, the automatic inlet and outlet device and the cooling water device
Some small freeze dryer manufacturers can install an intermediate sampling device to take out the sample for observation and testing without breaking the vacuum during the freeze dryer to determine the freeze-drying process.
Some manufacturers' freeze dryers are equipped with a eutectic point measuring device that can detect the eutectic point of the product during the pre-freezing process and monitor whether the product melts during the sublimation process.
Some manufacturers' freeze dryers can be equipped with automatic feeding and unpacking devices to reduce the labor force and ensure that the products are not contaminated.
Some small and medium-sized freezers are not suitable for air-cooling. If they are equipped with a cooling tower, it is troublesome. It can be equipped with a cooling water circulation device. This device is equipped with a water pump, a water tank and a freezer. It can be cooled with the lyophilizer. The part constitutes a loop in which the required water temperature is maintained by the freezer.

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