CN1097094A

CN1097094A - Method for processing Chinese mahogany

Info

Publication number: CN1097094A
Application number: CN 93108605
Authority: CN
Inventors: 王远程
Original assignee: BIOLOG TECHNOLOGY RESEARCH CEN; CHINESE GREEN FOOD DEVELOPMENT CENTER
Current assignee: BIOLOG TECHNOLOGY RESEARCH CEN; CHINESE GREEN FOOD DEVELOPMENT CENTER
Priority date: 1993-07-09
Filing date: 1993-07-09
Publication date: 1995-01-11

Abstract

The present invention relates to a kind of method for processing Chinese mahogany, Chinese toon is the name special product vegetables that a kind of consumer of being subjected to likes, the processing method in past is to flood system with salt, lose its fragrance and color and luster, the present invention adopts the method processing of vacuum freezedrying, can keep original fragrance of Chinese toon and color and luster, shape, be convenient to transportation and store, can be sold to the domestic and international market throughout the year, open with the warm water bubble when edible and get final product.

Description

Method for processing Chinese mahogany

The present invention relates to a kind of vegetables processing method, particularly Chinese toon vacuum freeze drying processing method.

Chinese toon is one of China name special product vegetables, its special fragrance is arranged, be well received by consumers, but its plucking time is extremely short, and only optimal quality during Clear and Bright in early spring to grain rains does not then have the Chinese toon listing At All Other Times in the whole year, promptly be to have quality also very poor, price is also expensive, if the Chinese toon busy season without processing, plucked back about five hours, just can moldy metamorphism, lose its delicious taste, processed Chinese toon in the past and adopt the system method of covering, can preserve a period of time though cover system, but lose original fragrance and color and luster, No. 90104730.9, China's patent application, name are called " method for cold storing Chinese toon bud in freshness " and propose to be refrigerated to-20 ℃, keep 8 hours, the dress polybag is housed in preservation in-15 ℃ of freezers, for annual edible, its shortcoming is to preserve, transportation all will be at-15 ℃, and is very inconvenient.

The objective of the invention is in order to overcome the shortcoming of above-mentioned processing method, according under uniform temperature and pressure, institute's water content can be directly sublimed into steam and biology enzyme can not make the principle of blade variable color in the Chinese toon, adopt the vacuum drying method of quick-frozen, make the Chinese toon converted products, can keep original fragrance of Chinese toon and color and luster for a long time.

The objective of the invention is to reach in the following method:

(1) bud and the tender leaf of harvesting Chinese toon are rinsed well with clear water, drain chopping;

(2) Chinese toon of chopping is put in the freeze-drying cabin, expanded on the shelf in freeze dryer;

(3) starting freeze dryer makes temperature reduce to-20 ℃～-55 ℃; kept 0.5～4 hour; begin to vacuumize; when vacuum reaches 0.05～0.005mbar, improve temperature in the storehouse, make institute's water content distillation in the Chinese toon; through more than 20 minutes; vacuum is reduced to 1mbar, and temperature rises to 0 ℃, continues to be warming up to 15～25 ℃; kept 4.5 hours; be warming up to 30～40 ℃ again, kept 2 hours, vacustat remains on 0.05～0.005mbar; freeze-drying finishes; shut down,, encapsulate with polybag to the normal temperature and pressure taking-up.

Effect of the present invention is: well protect through the Chinese toon of vacuum freeze-drying and gone original fragrance and color and luster, shape, be convenient to transportation and store again, can be sold to the domestic and international market throughout the year, open with the warm water bubble when edible, eating effect is identical with bright Chinese toon, also can be processed into multiple Chinese toon food.

Embodiment:

When early spring, Chinese toon sprouted, pluck bud and the tender leaf of Chinese toon, rinse well with clear water, drain Yu Shui, take by weighing 10Kg and expand on the shelf in the freeze-drying cabin, expanding thickness is 10～20mm, start instant freezer and cool to-40 ℃, kept 2.5 hours, and when beginning to be evacuated to vacuum and reaching 0.05～0.005mbar, began the temperature that raises, in 1 hour, rise to 0 ℃, moisture content begins distillation in the Chinese toon, and vacuum drops to 1mbar, keeps this temperature 15 minutes, continue to vacuumize, make vacuum up, heat, kept 4.5 hours to 20 ℃, continue to heat to 30 ℃, kept 12 hours, the vacuum 6 apt 0.05～0.005mbar that fix on, freeze-drying finishes, produce product 1kg, product has kept the original flavor quality of Chinese toon.

Claims

1, the new method for processing of a kind of Chinese toon is characterized in that the method processing with vacuum freezedrying.

2, method for processing Chinese mahogany as claimed in claim 1 is characterized in that its technology characteristics is as follows:

1) tender leaf and the bud water with Chinese toon cleans, and drains chopping;

2) Chinese toon of chopping is put in the freeze dryer, expanded on the shelf in freeze dryer;

3) start freeze dryer, make temperature reduce to-20～55 ℃, kept 0.5～4 hour, begin to vacuumize, when vacuum reaches 0.05～0.005mbar, begin to heat, after 20 minutes, temperature rises to 0 ℃, kept 4.5 hours, and be warming up to 30～40 ℃ again, kept 2 hours, vacustat remains on 0.05～0.005mbar, and freeze-drying finishes;

4) shut down to the normal temperature and pressure taking-up, encapsulate with polybag.