Freeze dryer refrigerating system and control method of refrigerating system

A refrigeration system and control method technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high extreme low temperature, affecting the quality of freeze-dried products, and expensive prices, so as to improve quality and improve freeze-drying production efficiency , the effect of improving reliability

Active Publication Date: 2015-04-22
TRUKING TECH LTD
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Problems solved by technology

The Freon refrigeration system is cheaper than the liquid nitrogen refrigeration system, but the extreme low temperature produced is higher, which makes the saturated vapor pressure difference of the ice produced by the freeze dryer in the analysis stage smaller, so that there is still a part of adsorbed water in the freeze-dried product, which affects freeze-dried product quality
The use of refrigerants with a lower evaporation temperature than Freon, such as liquid nitrogen, is more expensive (the cost includes liquid nitrogen purchase, liquid nitrogen transportation, liquid nitrogen gasification loss under atmospheric pressure, etc.), about three times that of compression refrigeration or so, users generally cannot afford

Method used

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  • Freeze dryer refrigerating system and control method of refrigerating system

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The invention discloses a refrigerating system of a lyophilizer, which comprises more than one set of main refrigerating assemblies and more than one set of auxiliary refrigerating assemblies. Independent refrigeration circuit for deck 2. The main refrigeration unit and the auxiliary refrigeration unit use different refrigerants, and the boiling point temperature of the refrigerant in the auxiliary refrigeration unit is lower than the boiling point of the refrigerant in the main refrigeration unit. For example, Freon can be used as the cooling medium for the main refrigeration component, and liquid nitrogen can be used as the cooling medium for the auxiliary refrigeration component. It can be understood that in other embodiments, other combinations of refrigeration media can also be used according to actual needs, which should...

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Abstract

The invention discloses a freeze dryer refrigerating system and a control method of the refrigerating system. The refrigerating system comprises one or more sets of main refrigerating components and one or more sets of auxiliary refrigerating components. The main refrigerating components and the auxiliary refrigerating components are in parallel connection to form independent refrigerating circulation loops for refrigerating a cold trap and plate layers on a freeze dryer. Different refrigerating media are adopted in the main refrigerating components and the auxiliary refrigerating components. The control method is based on the above refrigerating system. The freeze dryer refrigerating system and the control method have the advantages of being simple and compact in structure, easy and convenient to operate, capable of improving the refrigerating effect and working reliability and the like.

Description

technical field [0001] The invention mainly relates to the field of freeze-drying equipment, in particular to a refrigeration system suitable for a freeze-drying box and a control method for the refrigeration system. Background technique [0002] Vacuum freeze dryer (hereinafter referred to as freeze dryer) is the best equipment for freeze-drying drugs and food in the pharmaceutical industry and food industry. Through vacuum sublimation and analytical adsorption, the moisture of the product is reduced to a level that cannot maintain biological and chemical reactions for a long time. In the vacuum sublimation drying stage, the frozen free water in the material is lower than its co-junction Under the corresponding saturated vapor pressure conditions, it will escape completely by sublimation and enter the condensation surface to form ice. After the sublimation is over, generally more than 85% of the water can be removed. In the analytical drying stage, after the sublimation dry...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B25/00F25B41/04F26B5/06F26B25/00F25B41/20F25B41/40
CPCF25B25/005F26B5/06F26B25/00F25B41/20
Inventor 康峰翁宽钟元龙谭亮
Owner TRUKING TECH LTD
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