CN104770465B - A kind of dry-making method of dried of shepherd's purse - Google Patents
A kind of dry-making method of dried of shepherd's purse Download PDFInfo
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Abstract
A kind of dry-making method of dried of shepherd's purse, it is characterised in that：One, it pre-processes：Including cleaning, draining, segment and pre-freeze, 15 ~ 20 DEG C of pre-freezing temperature, the time is no less than 6h；Two, it is freeze-dried：Shepherd's purse after pre-freeze is freezed, 3 ~ 7 DEG C of temperature, 3~4h of sublimation time；3 ~ 7 DEG C of temperature parses 2 ~ 3h of time；Shepherd's purse water content 50% ~ 60% after processing；Three, it is dried in vacuo：Vacuum degree is set as 0.065 ~ 0.075MPa, and temperature is ramped up 50 DEG C from 30 DEG C, and the water content of 50 ~ 60min of drying time, shepherd's purse are down to 25% ~ 30%；Vacuum degree is set as 0.08 ~ 0.09MPa again, temperature is ramped up 70 DEG C from 50 DEG C, and the water content of 40 ~ 50min of drying time, shepherd's purse are down to 15% ~ 20%；Four, microwave drying：Shepherd's purse is dried by the power of 5 ~ 10W/g, is stirred when dry, and often heats 0.8 ~ 1.2 min, 10 ~ 20s of interval；The water content of shepherd's purse is set to be down to 8% hereinafter, completing drying.The present invention maintains the tissue morphology and nutritional ingredient of shepherd's purse, and color and luster is good, and rehydration is high, and flavor is more rich, and shortens drying time, improves drying efficiency.
Description
Technical field
The present invention relates to a kind of dry-making method of dried of shepherd's purse, the dry-making method of dried adopted more particularly to shepherd's purse after pre-process and freezing,
Vacuum, microwave combining drying.
Background technology
In recent years, with the raising of people's level of consumption, the change of Diet concept, wild vegetable is more and more from intermountain
Move towards dining table, play the role of to abundant common people's vegetable basket it is very important, meanwhile, many wild vegetables also have certain drug effect work(
Can, it is more and more favored by consumers.
Shepherd's purse --- crucifer is a kind of edible edible wild herbs suitable for people of all ages.Crawl is in earth's surface, face when shepherd's purse is grown
Color is in celadon, and smell faint scent is sweet, due to rich in a variety of amino acid needed by human such as glutamic acid, delicious flavour extremely, quilt
" top grades of edible wild herbs " are described as, also contains a large amount of celluloses, inorganic salts, vitamin, organic acid and Flavonoid substances, helps to enhance
The immune function of human body, and have certain efficacy of drugs concurrently, the certain diseases of prevention and treatment can be played the role of.Southern Dynasties beam people
Tao Hongjing《Mingyi Bielu》Middle title, shepherd's purse can " sharp irritabilities and in "；《Compendium of Materia Medica》" shepherd's purse is sweet in flavor mild-natured, enters cardiopulmonary for record
Liver Channel has the work(of diuresis, improving eyesight and liver, strengthening the muscles and bones, decompression, anti-inflammatory ".Modern Chinese medicine is it also holds that shepherd's purse has invigorating the spleen, profit
The effect of water, hemostasis, decompression, there is good therapeutic effect to bleeding gums, hepatitis, dysentery and infantile hyperpyrexia infantile convulsion.As spy
Kind wild vegetable, shepherd's purse have certain mitigation to winter green vegetables scarcity, but due to being limited obviously by season of growth property, and
Collecting period and storage period are shorter, and edible value and economic benefit are all not in full use.It, will using suitable dry technology
Shepherd's purse is processed into dried product, can not only meet different consumption demands, but also can effectively extend the supply time of shepherd's purse product.
Currently, the most common method of vegetable drying is air drying methods, but hot-wind-drying time is long, drying temperature
High, drying process destroys the institutional framework of vegetables, and deterioration in quality is serious after drying, and nutritive loss is big；It is another to have freezing dry
Drying method, although the natural quality and nutritive value of product can be preserved largely, drying time is long, equipment
Expensive, production cost is high, its scope of application is made to be limited to；Also method for microwave drying, due to its unique heating
Characteristic is directly goed deep into inside material when dry, makes interior free surface moisture while vaporizing, and removal material moisture ability is strong, but microwave is dry
Dry the problem of there is also uneven drying.
In conclusion how to provide a kind of preferable shepherd's purse dry-making method of dried becomes class for the solution of being researched and developed of the invention
Topic.
Invention content
It is an object of the present invention to provide a kind of dry-making method of dried of shepherd's purse, to solve the deficiency of existing many drying means.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of dry-making method of dried of shepherd's purse, steps are as follows：
Step 1: pretreatment：
(1), it cleans：The surface dust of blade surface is first removed with flowing water, and removes xanthochromia, corruption, have the blade damaged by worms, then will
Root is cut, and the free water on shepherd's purse surface is finally drained；It waits after the completion of draining, shepherd's purse is cut into the segment of 0.5 ~ 1cm long；
(2), pre-freeze：By the shepherd's purse segment pre-freeze segmented under the conditions of -15 ~ -20 DEG C, the pre-freeze time is no less than 6h, standby
With；
Step 2: freeze-drying：
Shepherd's purse taking-up after pre-freeze is placed in freeze drier, first temperature is set to -3 ~ -7 DEG C, shepherd's purse is risen
China's processing, 3~4h of sublimation time；Temperature is set to 3 ~ 7 DEG C again, dissection process is carried out to shepherd's purse, parses 2 ~ 3h of time；In conjunction with
Distillation and parsing treated shepherd's purse, for water content 50% ~ 60%, chlorophyll and vitamin C keep the 90% ~ 95% of fresh sample；
Step 3: vacuum drying：
(1), shepherd's purse is taken out from the freeze drier, is placed in vacuum drying chamber；First by vacuum degree be arranged-
In 0.065 ~ -0.075MPa ranges, temperature at the uniform velocity rises to 50 DEG C within drying time from 30 DEG C, and drying time is 50 ~
60min；So that the water content of shepherd's purse is down to 25% ~ 30%, chlorophyll and vitamin C keep the 80% ~ 88% of fresh sample；
(2), again by vacuum degree be arranged in -0.08 ~ -0.09MPa ranges, temperature within drying time from 50 DEG C at the uniform velocity on
70 DEG C are raised to, drying time is 40 ~ 50min；So that the water content of shepherd's purse is 15% ~ 20%, chlorophyll and vitamin C are kept
The 75% ~ 78% of fresh sample；
Step 4: microwave drying：
Shepherd's purse is taken out from the vacuum drying chamber, is placed in microwave drying oven, according to 5 ~ 10W/g shepherd's purses power into
Row drying stirs shepherd's purse when dry, and often heats 0.8 ~ 1.2 min, 10 ~ 20s of interval；So that the water content of shepherd's purse
8% is down to hereinafter, chlorophyll and vitamin C keep the 70% ~ 75% of fresh sample, completion drying.
Related content in above-mentioned technical proposal is explained as follows：
1, in said program, pre-freeze in pre-treatment step combines freeze-drying, due to pre-freeze can will be in shepherd's purse it is free
Water cure prevents from causing bubbling, contraction, solute migration etc. can not inversion in freeze-drying in the form of keeping dry products intrinsic
The generation of change, therefore compare and be directly dried for step, the not only tissue morphology of preferably can be kept shepherd's purse and nutrition
Substance is ready for freeze-drying in next step, improves the efficiency of entire drying process, and can alleviate place capacity not
Pressure is produced caused by foot, the shepherd's purse product of pre-freeze is not only the raw material of shepherd's purse drying, while can be used for the production of other shepherd's purses
The development and application of product, it is more meaningful in actual production.
2, in said program, freeze-drying includes distillation processing and two stages of dissection process, and the most important stage is to rise
China's processing, this stage can allow ice crystal directly to distil and escape and shepherd's purse is made to be dehydrated, and what is mainly removed is the Free water in shepherd's purse, and
Dissection process is then to remove the combination water adsorbed on the capillary wall and polar group that cannot be frozen in shepherd's purse.It is freeze-dried energy
The institutional framework and nutritional ingredient for preferably keeping shepherd's purse, can make material generate porous structure, be conducive to the discharge of vapor, improve
The rate of drying in later stage also improves the rehydration of product whereby.
3, in said program, vacuum drying is divided into former and later two stages.In the vacuum drying first half stage, using high vacuum
Degree, can reduce the boiling point of moisture in shepherd's purse so that gradually heat absorption is warming up to boiling to the moisture in shepherd's purse, makes the freedom in shepherd's purse
Water comparatively fast evaporates, while the combination water in shepherd's purse being made to move to shepherd's purse surface, shortens the time of heating；Due to using relatively low heating
Temperature, it is possible to reduce the damage of nutritional ingredient in shepherd's purse maintains the preferable color and luster of shepherd's purse and mode of appearance, while with temperature by
Edge up height, shepherd's purse heat up and reach boiling point time it is shorter, drying time can be shortened；
In vacuum drying rear half stage, using compared with rough vacuum, the moisture constantly boiling in shepherd's purse, internal moisture continues
To surface migration, is dried using higher temperature, rate of heat transfer can be accelerated, moisture evaporation is also faster, and in shepherd's purse
The continuous reduction of moisture, rate of drying can also decline, it is therefore desirable to which higher drying temperature makes the combination water evaporation in shepherd's purse, carries
High rate of drying.
In conclusion the characteristics of staged vacuum drying more meets heat and mass transfer in shepherd's purse drying process, makes effectively to conduct heat
It is mainly used for evaporable water, rather than heats up for material, not only shortens drying time in this way, but also maintain shepherd's purse well
Nutritional quality and color and luster.
4, in said program, microwave drying quickly removes residual moisture in shepherd's purse using high-energy, dry to reach
Purpose.Since microwave drying oven usually has the inhomogeneities in spatial distribution in use, so in microwave drying
The material for being placed on drying box surrounding is often caused over-drying situation often occur in journey, and the material being centrally disposed
It is also unseasoned so after 0.8 ~ 1.2min of microwave drying, to need 10 ~ 20s of interval completely, it is that material carries out of short duration tempering, keeps away
Exempt from the excessively high damage for causing shepherd's purse nutritional quality and color and luster of temperature, and after dry 2 ~ 3min, also to be stirred, to avoid
The non-uniform situation of microwave drying.
5, in said program, in pre-treatment step, before being cleaned to shepherd's purse first by shepherd's purse according to plant size and at
Ripe degree is classified.
6, in said program, in vacuum drying step, shepherd's purse sabot is uniform, sabot thickness control 0.5cm ~
0.7cm。
7, in said program, in pre-treatment step, by the shepherd's purse segment pre-freeze segmented under the conditions of -20 DEG C.
8, in said program, in microwave drying step, 1 min, 10 ~ 20s of interval are often heated.
The operation principle and advantage of the present invention is as follows：
A kind of dry-making method of dried of shepherd's purse of the present invention avoids single drying using effective combination of three kinds of drying modes
Defect, if sublimation drying is long, energy consumption is high, and microwave drying heating is uneven, larger to the destruction of shepherd's purse nutritional ingredient, and vacuum is dry
Shepherd's purse surface forms steam and causes quality decline under dry low temperature.The combination of three kinds of modes, has not only been maximally maintained shepherd's purse
Tissue morphology and nutritional ingredient, the shape and color and luster of shepherd's purse are preferable, there is preferably rehydration characteristics, moreover, by pre-freeze and cold
The dry original local flavor for maintaining shepherd's purse is lyophilized, and turning for flavor substance is promoted again by two-part vacuum drying and microwave drying
Change so that the flavor of shepherd's purse is stronger after drying；Drying time is greatly shortened in the present invention simultaneously, not only maintains shepherd's purse
Quality more improves drying efficiency.
Specific implementation mode
With reference to embodiment, the invention will be further described：
Embodiment one：A kind of dry-making method of dried of shepherd's purse, steps are as follows：
Step 1: pretreatment：
(1), it cleans：The surface dust of blade surface is first removed with flowing water, and removes xanthochromia, corruption, have the blade damaged by worms, then will
Root is cut, and the free water on shepherd's purse surface is finally drained；It waits after the completion of draining, shepherd's purse is cut into the segment of 0.5 ~ 1cm long；
(2), pre-freeze：By the shepherd's purse segment pre-freeze segmented under the conditions of -15 ~ -20 DEG C, the pre-freeze time is no less than 6h, standby
With；
Step 2: freeze-drying：
Shepherd's purse taking-up after pre-freeze is placed in freeze drier, first temperature is set to -3 ~ -7 DEG C, shepherd's purse is risen
China's processing, 3~4h of sublimation time；Temperature is set to 3 ~ 7 DEG C again, dissection process is carried out to shepherd's purse, parses 2 ~ 3h of time；In conjunction with
Distillation and parsing treated shepherd's purse, for water content 50% ~ 60%, chlorophyll and vitamin C keep the 90% ~ 95% of fresh sample；
Step 3: vacuum drying：
(1), shepherd's purse is taken out from the freeze drier, is placed in vacuum drying chamber；First by vacuum degree be arranged-
In 0.065 ~ -0.075MPa ranges, temperature at the uniform velocity rises to 50 DEG C within drying time from 30 DEG C, and drying time is 50 ~
60min；So that the water content of shepherd's purse is down to 25% ~ 30%, chlorophyll and vitamin C keep the 80% ~ 88% of fresh sample；
(2), again by vacuum degree be arranged in -0.08 ~ -0.09MPa ranges, temperature within drying time from 50 DEG C at the uniform velocity on
70 DEG C are raised to, drying time is 40 ~ 50min；So that the water content of shepherd's purse is 15% ~ 20%, chlorophyll and vitamin C are kept
The 75% ~ 78% of fresh sample；
Step 4: microwave drying：
Shepherd's purse is taken out from the vacuum drying chamber, is placed in microwave drying oven, according to 5 ~ 10W/g shepherd's purses power into
Row drying stirs shepherd's purse when dry, and often heats 0.8 ~ 1.2 min, 10 ~ 20s of interval；So that the water content of shepherd's purse
8% is down to hereinafter, chlorophyll and vitamin C keep the 70% ~ 75% of fresh sample, completion drying.
Wherein, pre-freeze in pre-treatment step combines freeze-drying, due to pre-freeze can by the free water cure in shepherd's purse with
The intrinsic form of dry products is kept, the production for causing the irreversible changes such as bubbling, contraction, solute migration in freeze-drying is prevented
It is raw, therefore compared to for directly carrying out freeze-drying step, the not only tissue morphology and nutrients of preferably can be kept shepherd's purse
Matter is ready for freeze-drying in next step, improves the efficiency of entire drying process, and can alleviate place capacity deficiency
Caused by produce pressure, the shepherd's purse product of pre-freeze is not only the raw material of shepherd's purse drying, while can be used for other shepherd's purse products
Development and application, be more of practical significance in actual production.
Wherein, freeze-drying includes distillation processing and two stages of dissection process, and the most important stage is distillation processing, this
Stage can allow ice crystal directly to distil and escape and shepherd's purse be made to be dehydrated, and what is mainly removed is the Free water in shepherd's purse, and dissection process
It is then to remove the combination water adsorbed on the capillary wall and polar group that cannot be frozen in shepherd's purse.Freeze-drying can preferably be kept
The institutional framework and nutritional ingredient of shepherd's purse can make material generate porous structure, be conducive to the discharge of vapor, improve the dry of later stage
Dry rate also improves the rehydration of product whereby.
Wherein, vacuum drying is divided into former and later two stages.It can be dropped using condition of high vacuum degree in the vacuum drying first half stage
The boiling point of moisture in low shepherd's purse so that gradually heat absorption is warming up to boiling to the moisture in shepherd's purse, makes the Free water in shepherd's purse quickly
Evaporation, while the combination water in shepherd's purse being made to move to shepherd's purse surface, shorten the time of heating；Due to using relatively low heating temperature
Degree, it is possible to reduce the damage of nutritional ingredient in shepherd's purse maintains the preferable color and luster of shepherd's purse and mode of appearance, while as temperature is gradual
Increase, shepherd's purse heat up and reach boiling point time it is shorter, drying time can be shortened；
In vacuum drying rear half stage, using compared with rough vacuum so that the moisture constantly boiling in shepherd's purse, internal moisture
Continue, to surface migration, to dry using higher temperature, rate of heat transfer can be accelerated, moisture evaporation is also faster, and with shepherd's purse
The continuous reduction of moisture, rate of drying can also decline in dish, it is therefore desirable to which higher drying temperature makes the combination water in shepherd's purse steam
It issues, improves rate of drying.
In conclusion the characteristics of staged vacuum drying more meets heat and mass transfer in shepherd's purse drying process, makes effectively to conduct heat
It is mainly used for evaporable water, rather than heats up for material, shortens drying time not to the utmost in this way, and maintain shepherd's purse well
Nutritional quality and color and luster.
Wherein, microwave drying quickly removes residual moisture in shepherd's purse using high-energy, dry to achieve the purpose that.Due to
Microwave drying oven usually has the inhomogeneities in spatial distribution in use, so in microwave drying process often
The material for being placed on drying box surrounding is caused over-drying situation often occur, and the material being centrally disposed is also unseasoned complete
Entirely, it so after microwave drying 1min, needs to be spaced 10s ~ 20s, is that material carries out of short duration tempering, avoids temperature is excessively high from causing shepherd's purse
The damage of dish nutritional quality and color and luster, and after dry 2 ~ 3min, also to be stirred, it is non-uniform to avoid microwave drying
Situation.
1,2 are shown in Table, a kind of dry-making method of dried of shepherd's purse of the present invention avoids list using effective combination of three kinds of drying modes
The defect of one drying, if sublimation drying is long, energy consumption is high, and microwave drying heating is uneven, to shepherd's purse nutritional ingredient destroy compared with
Greatly, it is dried in vacuo shepherd's purse under low temperature and shows that form steam causes quality decline.The combination of three kinds of modes is not only protected to the greatest extent
The tissue morphology and nutritional ingredient of shepherd's purse are held, the shape and color and luster of shepherd's purse are preferable, there are preferably rehydration characteristics；By pre-freeze and
Freeze-drying maintains the original local flavor of shepherd's purse, and turning for flavor substance is promoted again by two-part vacuum drying and microwave drying
Change so that the flavor of shepherd's purse is stronger after drying, and substantially reduces drying time, improves drying efficiency.
Fragrance is the important indicator for weighing shepherd's purse quality, determines acceptable degree of the people to shepherd's purse product.With regard to fragrance
For, distinctive blade of grass faint scent and vegetables and fruits fragrance is presented in shepherd's purse more, and various volatility and semi-volatile compounds are common in shepherd's purse
Effect forms its feature and grows smell system.Currently, the research about flavor substance in shepherd's purse is also less.There is expert using distillation
Method extracts shepherd's purse leaf volatile ingredient, isolates and wherein 12 kinds of compounds are determined, identify mainization of shepherd's purse
It studies and is divided into:L- guanidine radicals succinimide, phytol, plant ketone, oleic acid, palmitic acid etc..Also expert identifies shepherd's purse with GC-MS
A variety of volatile materials in dish, such as leaf-alcohol, diformazan trisulfide, dimethyl hexanal, 3- meptyl esters.Applicant establishes early period
The detection method of flavor substance in shepherd's purse, and identify effective 64 kinds of fragrance component in shepherd's purse, with alcohols, aldehydes, hydro carbons and
Based on oxygen compound containing thia, it is determined that the characteristic flavor compounds of shepherd's purse mainly have dimethyl disulfide, n-hexyl aldehyde, leaf-alcohol, leafiness
Aldehyde, three sulfone of diformazan, 2,6- dimethyl cyclohexanols, alpha, beta-lonone etc..But traditional dry-making method of dried easily causes flavor in shepherd's purse
The loss of substance leads to finished product quality decline, therefore, selects suitable drying mode and technological parameter, retains to greatest extent
The nutritious component in shepherd's purse Central Plains and aromatised fraction, it is significant to improving shepherd's purse comprehensive utilization ratio.By pre-freeze and freezing
The dry original local flavor for maintaining shepherd's purse promotes the conversion of flavor substance by two-part vacuum drying and microwave drying again,
So that the flavor of shepherd's purse is stronger after drying, while the reconstitution rate of shepherd's purse is improved, and drying time is greatly shortened, not only
The quality for maintaining shepherd's purse, more improves drying efficiency.
Embodiment two：A kind of dry-making method of dried of shepherd's purse, with embodiment one the difference is that：
One, when pre-freeze, shepherd's purse pre-freeze is under the conditions of -20 DEG C；
When two, being freeze-dried, temperature when distillation processing is set as -5 DEG C, and temperature when dissection process is set as 5 DEG C, always
Drying time is 5h；
When three, being dried in vacuo, the drying time in first half stage is 50min, and the water content of shepherd's purse is made to be down to 26.8%；It is later half
The drying time in stage is 45min, and the water content of shepherd's purse is made to be down to 17.3%；
Four, it when microwave drying, is dried according to the power of 8W/g shepherd's purses, and the intermittent time is 20s.
Other parts and embodiment one are identical, and which is not described herein again.
Embodiment three：A kind of dry-making method of dried of shepherd's purse, with embodiment one the difference is that：
One, when pre-freeze, shepherd's purse pre-freeze is under the conditions of -20 DEG C；
When two, being freeze-dried, temperature when distillation processing is set as -3 DEG C, and temperature when dissection process is set as 7 DEG C, always
Drying time is 6h, and the water content of shepherd's purse is made to be down to 54.3%；
When three, being dried in vacuo, the drying time in first half stage is 46min, and the water content of shepherd's purse is made to be down to 25.1%；It is later half
The drying time in stage is 50min, and the water content of shepherd's purse is made to be down to 15.3%；
Four, it when microwave drying, is dried according to the power of 5W/g shepherd's purses, and the intermittent time is 15s.
Other parts and embodiment one are identical, and which is not described herein again.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of dry-making method of dried of shepherd's purse, it is characterised in that：Steps are as follows：
Step 1: pretreatment：
(1), it cleans：The surface dust of blade surface is first removed with flowing water, and removes xanthochromia, corruption, have the blade damaged by worms, then root is cut
Fall, finally drains the free water on shepherd's purse surface；It waits after the completion of draining, shepherd's purse is cut into the segment of 0.5 ~ 1cm long；
(2), pre-freeze：By the shepherd's purse segment pre-freeze segmented under the conditions of -15 ~ -20 DEG C, the pre-freeze time is no less than 6h, spare；
Step 2: freeze-drying：
Shepherd's purse taking-up after pre-freeze is placed in freeze drier, first temperature is set to -3 ~ -7 DEG C, shepherd's purse is carried out at distillation
Reason, 3~4h of sublimation time；Temperature is set to 3 ~ 7 DEG C again, dissection process is carried out to shepherd's purse, parses 2 ~ 3h of time；In conjunction with distillation
With parsing treated shepherd's purse, for water content 50% ~ 60%, chlorophyll and vitamin C keep the 90% ~ 95% of fresh sample；
Step 3: vacuum drying：
(1), shepherd's purse is taken out from the freeze drier, is placed in vacuum drying chamber；First vacuum degree is arranged -0.065
In ~ -0.075MPa ranges, temperature at the uniform velocity rises to 50 DEG C within drying time from 30 DEG C, and drying time is 50 ~ 60min；So that
The water content for obtaining shepherd's purse is down to 25% ~ 30%, and chlorophyll and vitamin C keep the 80% ~ 88% of fresh sample；
(2), vacuum degree is arranged in -0.08 ~ -0.09MPa ranges again, temperature at the uniform velocity rises within drying time from 50 DEG C
70 DEG C, drying time is 40 ~ 50min；So that the water content of shepherd's purse is 15% ~ 20%, chlorophyll and vitamin C keep fresh sample
75% ~ 78%；
Step 4: microwave drying：
Shepherd's purse is taken out from the vacuum drying chamber, is placed in microwave drying oven, is done according to the power of 5 ~ 10W/g shepherd's purses
It is dry, shepherd's purse is stirred when dry, and often heat 0.8 ~ 1.2 min, 10 ~ 20s of interval；So that the water content of shepherd's purse is down to
8% hereinafter, chlorophyll and vitamin C keep the 70% ~ 75% of fresh sample, completion drying.
2. dry-making method of dried according to claim 1, it is characterised in that：In pre-treatment step, before being cleaned to shepherd's purse
First shepherd's purse is classified according to plant size and maturity.
3. dry-making method of dried according to claim 1, it is characterised in that：In vacuum drying step, shepherd's purse sabot is uniform,
Sabot thickness control is in 0.5cm ~ 0.7cm.
4. dry-making method of dried according to claim 1, it is characterised in that：In pre-treatment step, the shepherd's purse piece that will segment
Section pre-freeze is under the conditions of -20 DEG C.
5. dry-making method of dried according to claim 1, it is characterised in that：In microwave drying step, 1 min is often heated,
Have a rest 10 ~ 20s.
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| CN109505153A (en) * | 2018-11-27 | 2019-03-22 | 苏州市职业大学 | A kind of efficient tea dyeing method |
| CN109984184A (en) * | 2019-05-21 | 2019-07-09 | 新疆黑果枸杞生物科技有限公司 | A kind of freeze-drying method of small white almond |
| CN114459210B (en) * | 2021-12-27 | 2023-03-07 | 杭州富睿捷科技有限公司 | Automatic acquisition method and device for freeze-drying process parameters and freeze dryer |
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| CN101156623A (en) * | 2007-11-16 | 2008-04-09 | 江南大学 | Aassociation drying Method for preparing dehydrated vegetable and fruit |
| CN101965991A (en) * | 2009-07-27 | 2011-02-09 | 邢建国 | Formula and preparing process of dish (soup) with eight food materials |
| CN102475244A (en) * | 2010-11-27 | 2012-05-30 | 尹培兰 | Vacuum microwave processing method for vegetable product |
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