Method and device for drying poria cocos through vacuum pulsation

Abstract

The invention belongs to the technical field of agricultural product processing and relates to a nutrition-loss-free poria cocos processing method and equipment, in particular to a method and device for drying poria cocos through vacuum pulsation. According to the method, a vacuum drying mode is adopted for drying diced poria cocos, and the situation that due to the fact that internal and external humidity gradients are uneven, volume contraction is uneven, so that materials are cracked or broken is avoided. By means of the method and device for drying the poria cocos through vacuum pulsation, under the pulsation condition that the pressure inside a drying chamber (1) is continuous, microcosmic pore channels of the diced poria cocos (19) can be expanded and contracted ceaselessly and furthermore made to communicate with one another; and volume contraction, generated in the drying process, of the diced poria cocos can be effectively promoted, and high material strength is maintained. The device comprises a vacuum system, an auxiliary hot air drying system, a heating system and a control system. By means of the device, intelligent adjustment of the temperature and the vacuum degree can be effectively achieved; the diced poria cocos can be dried quickly and evenly; and the dried diced poria cocos (19) is high in compactness and not prone to breakage.

Description

technical field [0001] The invention belongs to the technical processing field of agricultural products, and relates to a method and equipment for processing poria cocos without nutrient loss, in particular to a method and device for vacuum pulse drying poria cocos. Background technique [0002] Poria cocos (Poria cocos) is the sclerotium of the polypore fungus Poria cocos, which is a traditional Chinese medicinal material that can be used for both medicine and food. The 2015 edition of "Chinese Pharmacopoeia" stipulates that it must be dried before it can be used as medicine. [0003] The common forms of Poria cocos products include Poria cocos diced, Poria cocos tablet, and Poria cocos powder, among which Poria cocos diced has the largest market demand because of its convenient processing and clean appearance. Therefore, the processing method of Poria cocos is mainly dried after manual or mechanical dicing. The dried poria cocos finished product not only maintains the me...

AI Technical Summary

Problems solved by technology

At present, the drying trays are mostly made of metal materials, with a thickness of 1-2 mm, a large area and a thin-walled structure. The manufacturing process of the trays and bumps during use can easily cause warping and concave-convex deformation of the trays. Phenomena such as poor regional contact and point-like heat conduction between the heating plates are likely to cause insufficient and uneven heating of the material during drying, which affects the drying efficiency. The heating of the material through thermal radiation without direct contact between the heat source and the material can effectively solve this problem. problem, and in a vacuum state, the air and water vapor content is less, which is conducive to the transmission of thermal radiation energy

[0007] For the processing of Poria cocos, current research mainly focuses on the fields of cultivation methods and active ingredient extraction; such as the artificial cultivation method of Poria cocos with application number CN 201480001134; Technology, a polysaccharide extraction process is given; another example is a kind of Poria cocos mycelia fermented tea with the application number CN201610402892.7, which uses tea leaves as raw materials to prepare Poria cocos fermented tea; but none of them involve the drying process of Poria cocos method and device

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