Microwave vacuum freeze-drying apparatus for food and drug production

Abstract

The utility model relates to a metal core which has replaced the traditional metal cores of the cold stores; after an access is opened in the microwave radiation of the heat energy in the vacuum freeze-drying, the microwave radiation provides energy directly to the material at low pressure or ultra low pressure, so as to make the water molecules in the internal and external parts of the ice crystal sublime rapidly; the change not only has an advantage that the microwave can heat the internal and external part of the material at the same time, but also reserves an advantages that the prior vacuum freeze-drying equipment can decrease temperature instantly when pre-freezing and maintain the temperature in the later period of the desorption. The main microwave heating source is arranged in the centre of the material with no metal wall in the utility model, which overcomes the insufficiency of heating way by the prior microwave and makes the material heated evenly; during the period of desorption, the utility model combines the microwave heating and the shelf silicone oil heating and makes the shelf silicone oil heating as the last safeguard for the dry quality of the products, which enables the microwave overheating never take effect on the quality of the products. The utility model introduces the infrared sensor to the microwave vacuum freeze-drying equipment, which can use the microwave energy scientifically, powerfully and accurately.

Description

technical field [0001] The invention relates to a drying device, in particular to a microwave vacuum freeze-drying device used in the production of food and medicine. Background technique [0002] As we all know, compared with other methods of drying, freeze-drying has the advantages of stable product properties, good quality, high content of active ingredients, fast onset of action, and high bioavailability. However, due to the disadvantages of long production cycle, high energy consumption, small unit production capacity and high production cost of freeze-drying technology, its wide application is limited. [0003] In order to analyze the problem, improve the operation level, shorten the production cycle, and reduce energy consumption, Alican: Talking about vacuum freeze-drying technology. Vacuum. [J]. 2002, (4): 43-45 gives the traditional vacuum freeze-drying method. The step-up vs. step-down dilemma described below: [0004] "2.2.3 Sublimation stage pressure [0005]...

AI Technical Summary

Problems solved by technology

[0020] 2. This patent does not clearly give the specific location of the freezer in the vacuum chamber

Therefore, there is a great possibility of overheating or burning the product due to inadvertent operation during the desorption stage with low energy consumption

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