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Microwave freeze drying method for dendrobium

A drying method, microwave freezing technology, applied in the direction of drying solid materials, heating to dry solid materials, and non-heating to dry solid materials, etc., can solve the problems of different product sales, difficulty in uniform freeze-drying, and difficulty in freeze-drying of Dendrobium officinale. , to achieve the effect of reducing drying time and cost, retaining taste and appearance

Inactive Publication Date: 2017-03-29
GUANGXI BAMALAN LONG LIFE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the freeze-drying of Dendrobium officinale is more difficult, and prior art generally is to cut into very thin slice, and thickness is a little bigger just to be difficult to freeze-drying evenly; Or punch dense hole on stem bark with needle after cutting into sections, make the sale of product relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Remove the leaves and roots of fresh dendrobium, wash them, pour them into the color protection solution consisting of 1% (weight) salt and 1% (weight) citric acid, soak for 1 hour, take them out and drain them, put them in the freezer to pre-freeze, pre-freeze The freezing temperature is -5°C, and the pre-freezing time is 4 hours; then cut into 2 mm thin slices with a microtome;

[0017] 2) Put the dendrobium flakes obtained in step 1) into a tray, spread them into thin layers, and put them into a microwave dryer with a microwave intensity of 4W / g and a drying time of 3 minutes;

[0018] 3) Stop the microwave drying, take out the tray, transfer it to a vacuum freeze dryer, freeze-dry at a temperature of -20°C and a vacuum of -80 kPa, dry until the water content is less than 16%, and make a finished product after packaging and storage .

Embodiment 2

[0020] 1) Remove the leaves and roots of fresh dendrobium, wash them, pour them into the color protection solution consisting of 1% (weight) salt and 1% (weight) citric acid, soak for 1 hour, take them out and drain, and pre-freeze at a temperature of -20°C, pre-freeze for 1.5 hours; then cut into 18 mm sections with a microtome;

[0021] 2) Put the dendrobium segment obtained in step 1) into a tray, spread it into a thin layer, and put it into a microwave dryer with a microwave intensity of 7W / g and a drying time of 8 minutes;

[0022] 3) Stop the microwave drying, take out the tray, transfer it to a vacuum freeze dryer, freeze-dry at a temperature of -20°C and a vacuum of -80 kPa, dry until the water content is less than 16%, and make a finished product after packaging and storage .

Embodiment 3

[0024] 1) Select the plump fresh Dendrobium candidum that has been planted for more than 3 years, free from diseases and insect pests, remove the leaves and roots, wash, pour into the color protection solution composed of 1% (weight) salt and 1% (weight) citric acid and soak for 1 hour , take out, drain, and pre-freeze at -10°C for 2 hours; then cut into 5 mm slices;

[0025] 2) Put the dendrobium flakes obtained in step 1) into a tray, spread them into thin layers, and put them into a microwave dryer with a microwave intensity of 5W / g and a drying time of 5 minutes;

[0026] 3) Stop the microwave drying, take out the tray, transfer it to a vacuum freeze dryer, freeze-dry at a temperature of -20°C and a vacuum of -80 kPa, dry until the water content is less than 16%, and make a finished product after packaging and storage .

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Abstract

The invention discloses a microwave freeze drying method for dendrobium and belongs to the field of health care product or food processing. The method comprises the following steps that leaves and roots of fresh dendrobium are picked off, the left dendrobium is washed and poured into color-protecting liquid to be immersed for 1 h, the immersed dendrobium is taken out, water is drained off, the dendrobium is subjected to prefreezing, the prefreezing temperature ranges from -20 DEG C to -5 DEG C, and the prefreezing time ranges from 1.5 hours to 4 hours; then, after the dendrobium is cut into segments being 2 mm-18 mm long, the segments are put into a tray and spread into a thin layer, the tray is put into a microwave dryer, the microwave strength ranges from 4 W / g to 7W / g, and the drying time ranges from 3 min to 8 min; and microwave drying is stopped, the tray is taken out and transferred into a vacuum freeze dryer, freeze drying is carried out at the temperature of -20 DEG C and the vacuum degree of -80 kPa, the segments are dried until the water content is smaller than 16%, and through packing and storing treatment, the finished products are obtained.

Description

technical field [0001] The invention relates to the field of health care products or food processing, in particular to a drying treatment method of Dendrobium officinale. Background technique [0002] Dendrobium officinale Dendrobium officinale Kimura et Migo is the dry stem of the perennial epiphytic herb of Dendrobium orchidaceae. It is a kind of precious Chinese medicinal plant. It is sweet in nature and slightly cold. For febrile disease fluid injury, dry mouth and polydipsia, insufficient stomach yin, lack of food and retching, persistent asthenic fever after illness, hyperactivity of fire due to yin deficiency, bone steaming and labor-heat, blurred vision, muscle flaccidity and weakness. It was first recorded in "Shen Nong's Materia Medica" and listed as the top grade. It is said to be "sweet, flat, non-toxic, in the main injury, eliminates numbness, lowers qi, nourishes five viscera and fatigue, strengthens yin... thickens the stomach, lightens the body, and prolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B7/00F26B3/347F26B5/06
Inventor 黄旭谢集照谢云峰
Owner GUANGXI BAMALAN LONG LIFE TECH CO LTD
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