CN105360450A - A vacuum freeze-drying method for chrysanthemum morifolium - Google Patents

Abstract

A vacuum freeze-drying method for chrysanthemum morifolium is provided. The method includes following specific operation steps: firstly selecting the chrysanthemum morifolium, with chrysanthemum morifolium little leaf apexes with high quality and good conditions being selected, refreshing the chrysanthemum morifolium little leaf apexes by atomizing at 5-10 DEG C for 10 h, freezing, and drying to remove more than 95-99% of water in the chrysanthemum morifolium, so that a dried product can be stored for a long term without deterioration. According to the method, water frozen in advance in materials is removed directly by ice state sublimation in a form as water vapor under high vacuum states and by utilization of a sublimation principle without the step of ice melting, thus achieving the objective of freeze-drying. The chrysanthemum morifolium prepared by the method can rapidly rehydrate and reinstate when being used as tea, and can be reinstated to a degree that fiber characteristics of the reinstated chrysanthemum morifolium can be same with that of a fresh product.

Description

A kind of FLOS CHRYSANTHEMI ALBA from Haizhou of China vacuum freeze-drying method

Technical field

The present invention relates to FLOS CHRYSANTHEMI ALBA from Haizhou of China field, particularly relate to a kind of FLOS CHRYSANTHEMI ALBA from Haizhou of China vacuum freeze-drying method.

Background technology

FLOS CHRYSANTHEMI ALBA from Haizhou of China is the one of chrysanthemum, is also the main material of chrysanthemum tea.Fresh chrysanthemum can not be preserved for a long time, so chrysanthemum tea generally is dry chrysanthemum, chrysanthemum tea is now all carry out oven dry by drying technology to FLOS CHRYSANTHEMI ALBA from Haizhou of China to preserve, and drinks for the later stage.Oven dry flow process is now: first go-on-go-water steaming-microwave drying-sulphur smokes a look-finished product go-on-go-particle packing.Furnace drying method now needs high temperature to realize, and high temperature can cause damage to the beneficiating ingredient of FLOS CHRYSANTHEMI ALBA from Haizhou of China inside, and FLOS CHRYSANTHEMI ALBA from Haizhou of China effect is reduced by half.FLOS CHRYSANTHEMI ALBA from Haizhou of China needs to carry out water steaming, microwave drying before baking, water steaming and microwave drying can destroy the color of FLOS CHRYSANTHEMI ALBA from Haizhou of China, cause the FLOS CHRYSANTHEMI ALBA from Haizhou of China colour-difference after processing, can not be esthetically acceptable to the consumers, so the producer adds sulphur smoke technique, through this operation, FLOS CHRYSANTHEMI ALBA from Haizhou of China can be recovered vivid color, consumer can be accepted, but sulphur smoke this operation can by Sulphur Residue in FLOS CHRYSANTHEMI ALBA from Haizhou of China, drink such FLOS CHRYSANTHEMI ALBA from Haizhou of China and can produce huge injury to human body.So the drying mode of FLOS CHRYSANTHEMI ALBA from Haizhou of China is badly in need of improving.

Summary of the invention

According to above technical problem, the invention provides a kind of FLOS CHRYSANTHEMI ALBA from Haizhou of China vacuum freeze-drying method, it is characterized in that its concrete operations flow process is:

(1) first FLOS CHRYSANTHEMI ALBA from Haizhou of China is selected, selects the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip that quality is good, product are on very good terms,

(2) then under the condition of 5-10 DEG C, carry out spraying to FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip fresh-keeping, fresh keeping time is 10 hours;

(3) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip through Preservation Treatment is positioned in special supporting bracket, often holds in the palm one;

(4) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip be placed in supporting bracket is put uniformly in dry storehouse dish;

(5) household freezer is lowered the temperature, before being put into by FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum, airborne temperature is dropped to less than 0 DEG C;

(6), after household freezer temperature mixes up, the FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum blade tip handled well is put into freeze drying box and carries out freezing, pre-freeze is to-60 DEG C;

(7) freezing complete after household freezer is vacuumized, vacuumize the vacuum needing to reach more than 100uHg;

(8) vacuumize and to heat it afterwards, point three steps are progressively heated to 55 DEG C, and warm-up time is 12-13 hour, after maximum temperature keeps 3-5 hour, can terminate freeze-drying operation.

Beneficial effect of the present invention is: present invention utilizes freeze drying technology and carry out kept dry to FLOS CHRYSANTHEMI ALBA from Haizhou of China, dry at low temperatures, some volatile ingredients loss in FLOS CHRYSANTHEMI ALBA from Haizhou of China is very little, can retain the beneficiating ingredient of original FLOS CHRYSANTHEMI ALBA from Haizhou of China completely, make it not be destroyed, ensure that effect of chrysanthemum tea.Freeze drying technology of the present invention can ensure the form of FLOS CHRYSANTHEMI ALBA from Haizhou of China, keep state and the color of original flower, just the same with the state of fresh flower from intuitively looking, still can match in excellence or beauty with fresh goods, so just eliminate sulphur and smoke process, avoid sulphur to enter in FLOS CHRYSANTHEMI ALBA from Haizhou of China body, the sulphur avoided in FLOS CHRYSANTHEMI ALBA from Haizhou of China body produces infringement to human body.In freeze-drying operation, under FLOS CHRYSANTHEMI ALBA from Haizhou of China is in low temperature or hot environment always, the effect of microbial growth and enzyme cannot be carried out, and therefore can keep original proterties by FLOS CHRYSANTHEMI ALBA from Haizhou of China.Owing to carrying out drying under the state freezed, therefore volume is almost constant, maintains original structure, concentration phenomena can not occur, and ensure that the external morphology of FLOS CHRYSANTHEMI ALBA from Haizhou of China.Freeze drying technology of the present invention carries out under vacuo due to drying, and oxygen is few, and therefore some oxidizable materials obtain protection.Carry out the moisture that drying can get rid of more than 95% ~ 99% in FLOS CHRYSANTHEMI ALBA from Haizhou of China body after freezing again, make dry after product to preserve for a long time and unlikely rotten.Under high vacuum state by the present invention, utilize sublimation principle, make the moisture in the material freezed in advance, without the thawing of ice, directly distil as water vapour is removed with ice state, thus reaching cryodesiccated object, the FLOS CHRYSANTHEMI ALBA from Haizhou of China obtained like this can rehydration reduce fast as during tea-drinking, can reset into consistent with the fiber properties of fresh goods.

Detailed description of the invention

According to embodiment, the present invention is further described:

Embodiment 1

A kind of its concrete operations flow process of FLOS CHRYSANTHEMI ALBA from Haizhou of China vacuum freeze-drying method is:

(1) first FLOS CHRYSANTHEMI ALBA from Haizhou of China is selected, selects the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip that quality is good, product are on very good terms,

(2) then under the condition of 10 DEG C, carry out spraying to FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip fresh-keeping, fresh keeping time is 10 hours;

(3) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip through Preservation Treatment is positioned in special supporting bracket, often holds in the palm one;

(4) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip be placed in supporting bracket is put uniformly in dry storehouse dish;

(5) household freezer is lowered the temperature, before being put into by FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum, airborne temperature is dropped to 0 DEG C;

(6), after household freezer temperature mixes up, the FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum blade tip handled well is put into freeze drying box and carries out freezing, pre-freeze is to-60 DEG C;

(7) freezing complete after household freezer is vacuumized, vacuumize the vacuum needing to reach more than 100uHg

(8) vacuumize and to heat it afterwards, point three steps are progressively heated to 55 DEG C, and warm-up time is 13 hours, after maximum temperature keeps 3 hours, can terminate freeze-drying operation.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.

Claims (1)

1. a FLOS CHRYSANTHEMI ALBA from Haizhou of China vacuum freeze-drying method, is characterized in that its concrete operations flow process is:

First FLOS CHRYSANTHEMI ALBA from Haizhou of China is selected, select the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip that quality is good, product are on very good terms;

Then under the condition of 5-10 DEG C, carry out spraying to FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip fresh-keeping, fresh keeping time is 10 hours;

(3) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip through Preservation Treatment is positioned in special supporting bracket, often holds in the palm one;

(4) the FLOS CHRYSANTHEMI ALBA from Haizhou of China daisy blade tip be placed in supporting bracket is put uniformly in dry storehouse dish;

(5) household freezer is lowered the temperature, before being put into by FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum, airborne temperature is dropped to less than 0 DEG C;

(6), after household freezer temperature mixes up, the FLOS CHRYSANTHEMI ALBA from Haizhou of China tire chrysanthemum blade tip handled well is put into freeze drying box and carries out freezing, pre-freeze is to-60 DEG C;

(7) freezing complete after household freezer is vacuumized, vacuumize the vacuum needing to reach more than 100uHg;

(8) vacuumize and to heat it afterwards, point three steps are progressively heated to 55 DEG C, and warm-up time is 12-13 hour, after maximum temperature keeps 3-5 hour, can terminate freeze-drying operation.