JPS63164844A - Processing of raw green tea leaf and apparatus therefor - Google Patents

Abstract

PURPOSE:To obtain green tea with a high gamma-aminobutyric acid content, by putting raw green tea leaves in a hermetically sealed vessel, storing the green tea leaves under special and oxygen-free condition and producing green tea. CONSTITUTION:An airtight supply valve 12 is opened to charge raw green tea leaves from a charging inlet 11 into a hermetically sealed vessel 1 while rotating a screw plate 34 at a low rotation speed through the central shaft 32. A controlling valve 17 at a vent hole 16 and a valve 83 of a replacing gas producing means 8 are then opened to introduce a gas containing no oxygen, e.g. N2, CO2, etc., into the vessel 1 to keep the interior of the vessel 1 under oxygen-free condition. A current is passed through an electrically heated heater 21 to store the green tea leaves at 20-92 deg.C atmospheric temperature for 1-5hr by a temperature controller 22 and temperature sensor 23. An airtight shutter 14 is then opened to rotate the screw plate 34 through the central shaft 32 and the raw green tea leaves are taken out of a taking outlet 13, passed through a transporting machine 7 and conveyed to a green tea manufacturing and processing machine to carry out green tea production according to a conventional method.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Applications This invention (a) A method for processing fresh tea leaves for producing tea containing a large amount of r-aminobutyric acid (GABA), which has a blood pressure lowering effect on the human body; Put it in the bag tube.

(0) Conventional technology: The freshly picked tea leaves are placed in a container, the air is blocked off, and a gas such as nitrogen is injected to create an anaerobic state without oxygen for 5 to 2 hours.
If it is maintained for 0 hours, the above G (C) Problem to be solved by the invention The increase in GABA is caused by a change in GABAi due to the action of glutamic acid or oxygen in the tea leaves. Atmosphere in an anaerobic state: When the temperature is low, the increase is slow, and when it is high, it increases quickly. Therefore, if you perform anaerobic treatment of green tea leaves at the same temperature as in the past, the time required for the treatment will change depending on the temperature. It changes and is unstable, and generally lasts for 5 to 20 hours.
:! ! It takes. Therefore, the content of the above-mentioned GABA in the treated raw tea leaves (or product tea) tends to be unstable and non-uniform, and the processing efficiency is low, so that large quantities cannot be processed.

This invention provides a method for processing fresh tea leaves that rapidly and stably generates GALA in fresh tea leaves by appropriately heating the atmosphere of tea 1jI affected by an anaerobic state without oxygen and maintaining it at a predetermined temperature. That outfit 2v! The purpose of the present invention is to make the content of GALA high and uniform in raw tea leaves and even product tea, and to process a large amount by increasing the processing efficiency.

Add fresh leaves and add nitrogen or lJ! Air inside the container due to gases that do not contain oxygen such as soybean gas! After drying, the fresh tea leaves are exposed to anoxic conditions, and the ambient temperature is set at 20 to 90℃.
The raw tea leaves were heated to ℃ and kept for 1 to 5 hours, then sprinkled out and processed into tea using the overcrowded tea manufacturing method.
It is something.

In addition, the apparatus according to the present invention is provided with a green tea leaf inlet and a tea leaf outlet each equipped with an isolation mechanism from the outside air on one side and the other side, and a W bottle gas supply port on the other side and the other side, respectively.
A window-closed container equipped with an internal air exhaust port and a heating means for the atmosphere, and a nitrogen or
! It consists of a means for generating a gas that does not contain oxygen such as acid gas, a transporter for transporting tea leaves provided below the outlet, and a tea processing means located ahead of the transporter.

1 shows an embodiment of an apparatus for carrying out this invention, and the method and use of the apparatus of the present invention will also be explained based on this drawing.

1 is a space container with a cylindrical upper part and an inverted conical lower part. A green tea leaf inlet 11 equipped with a feed valve 12 is formed at the upper part of the space container 1, and an airtight shutter 14 is formed at the lower end.
A fresh tea leaf outlet 13 is formed. Further, an ate gas supply port 15 is formed in the closed container 1 adjacent to its outlet 13, and a replacement gas generating means 8 is provided in the supply port 15.
Connect. An exhaust port 16 is formed in the upper part of the closed container 1 to allow internal air and gas to be discharged due to the pressure difference between the inside and outside.
tear apart.

A central shaft 32 that can be rotated at low speed by a low-speed morph 31 is mounted at the center of the closed container 1 . The upper part of the central shaft 32 inside the airtight container 1 is equipped with several blades 33 for stirring the green tea leaves! ! ! At the bottom there is a screw plate 34v for 9 stirring.
! Attach @.

A heat insulation jacket 2 is installed on the circumferential surface of the closed container 1.

The thermal jacket 2 may be an O-crivalve that has hot water in the space, or 1. III Pressure cylinder opens and closes! In addition, any W-loss gas may be used as long as it is inert, does not contain oxygen, and is not harmful, such as nitrogen or blown acid gas, but in this example, nitrogen gas is used. Gas generating means 81.t, il nitrogen pump 8
1. Consists of a pressure regulator 82 and an opening/closing 4-section valve 83.

23 (temperature sensor of hot water temperature y41i device 22, 45
is the frame of the closed container 1. 7 may be disposed below the outlet 13, or may be a processing line for semi-fermented tea or a processing line for black tea, and therefore its details 1 are not shown.

Therefore, the effects of the embodiments of the present invention will be described in accordance with the freezing of green tea leaves.

First, the airtight supply valve 12 is rotated or opened, and the picked green tea M is gradually introduced into the airtight container 1 from the input 011. As the tea leaves gradually accumulate from the bottom, center axis 3
2 is rotated at low speed from time to time, and the screw plate 34 is used to stir the surrounding green tea leaves so as to push them up, so that the green tea leaves are evenly stacked without being strongly clogged.

On the other hand, when more than half of the tea leaves have accumulated,
Open the adjusting pulp 17 of the exhaust port 16.

Pulp 83v of W loss gas generation means 8! Open, window closed container 1
Start exchanging the air inside. i according to the degree of closure of the valve 83
of nitrogen gas is supplied from the bottom of the two closed volumes B1, and
Ventilation is created between the tea leaves, and the air that was previously between the tea leaves is removed as it reaches the top. ! Since the pressure inside the closed container 1 is higher than that outside,
In! As the amount of air decreases, nitrogen is also exhausted from the exhaust port 16.

On the other hand, the temperature controller 22 is set in advance to begin exchanging the air in the earthen floor container 1, and the temperature is set while the temperature sensor 23 detects an atmosphere of 8 degrees. Turn on and off (2) and heat.

The higher the ambient temperature of green tea leaves, the faster the glutamic acid in them is converted to GABA, and therefore the green tea leaves with a higher GABAAlt content can be obtained in a shorter time. However, if you raise the temperature too high, oxidation and oxygen will become active, and sudden fermentation will occur, resulting in the product! This will seriously damage the ll. Therefore, the temperature of the upper part is set at 25 to 50 degrees Celsius, and the anaerobic treatment time without oxygen is carried out for about 2 to 5 hours (
However, it is preferable to heat the tea leaves to a temperature of 50° C. or higher if the quality of the tea leaves, or even the quality of the product as a luxury item, is not much of a concern, but it is necessary to keep the heating time as short as possible.

Once you have finished adding the fresh tea leaves.

At the same time as stopping the rotation of the central shaft 32,
v! Stop or close. Although it depends on the size of the pressure vessel 1 and the amount of fresh tea leaves put in, if the supply of nitrogen gas continues for several tens of minutes, most of the air inside is replaced with nitrogen gas, and the oxygen is removed. Ignore the key and make it into a sealed shape.Then, leave the tea leaves in an anaerobic state with no M element.

During this time, as mentioned above, Atmosphere inside closed container 1, 3i
Keep the temperature at the set value.

The ambient temperature is maintained at a predetermined temperature of 1 degree higher than the outside air, so regardless of changes in the outside temperature, the above GA can be maintained within the tea industry.
5. Dry tea that changes to BA stably and more rapidly 1.
To have more than 20019 GABA per o0g
− Then, the young tea leaves will produce blood pressure lowering remedies, but each will become a fruit. 2 when the ambient temperature is 15℃
For example, if the temperature is maintained at 35°C, it will take 3.4 hours, whereas it would take about 6 hours at 25°C for about 0 hours. Therefore, the processing time for green tea leaves will be much faster.

Once the anaerobic (storage) treatment of fresh tea leaves, which has been deprived of oxygen for a predetermined period of time depending on the ambient temperature, as described above, has been completed, it is time to check!
The shutter 14 is opened and the central shaft 32 is rotated again.

When T is reached, the green tea leaves in the center are pushed up by the screw plate 34 and a space is created around the outlet 13, so the green tea leaves around it are taken out from the outlet 13 little by little. Is the tea leaves taken out one after another a transport machine? One layer is added to the top, and the tea is transported directly to the tea processing machine where it is processed into the next round of tea processing.

As mentioned above, even if tea leaves C are produced a lot of GALA, even if they are processed, or even if they are processed using an overcrowded manufacturing method, the amount of GALA they retain will not change (magon). .

In this example, f! A stirring member 34 is provided at the center of the closed container 1, and this is rotated slowly when green tea leaves are added.
The stored green tea leaves are evenly stacked in all parts, and when bent with nitrogen gas, it becomes like this. You can also process large amounts at once.

Also,! Since the atmospheric temperature inside the closed container 1 can be set freely, by setting it appropriately according to the raw tea leaves to be added,
It is important to adjust the production speed of GABA, and eventually G
Item 14 that has sufficient ABA ingredients and is a luxury item.
It is also possible to manufacture products with the following features.

(f) Effects In this invention, the picked tea leaves are placed in an anaerobic state without oxygen, and the anaerobic atmosphere is heated to an appropriate temperature, so they are not affected by changes in the surrounding outside temperature. , it is possible to rapidly and stably generate GABA in green tea leaves. Therefore, the time required for anaerobic treatment to avoid the generation of GABA is significantly shortened, the processing efficiency of green tea leaves is increased, and the amount of GABA produced is reduced. It is possible to reliably obtain a predetermined amount of fresh tea leaves, thereby improving the quality of the product tea. Furthermore, by adjusting the degree of heating of the ambient temperature,
Confectionery of product tea containing sufficient amount of GABA as an active ingredient and also having quality vII as a luxury item Figure 1 is a partially cutaway front view showing an example of the anaerobic treatment time of raw tea leaves according to the present invention.

1... Airtight container 11.13... Fresh tea leaf inlet, outlet O12, 14.
・・Kisei supply gas well, gas shutter (both cutoff mechanism) 15.16...Wt1!1 gas supply! 80. Exhaust port 2
... Thermal jacket (heating device t) 8 ... W
Tll gas generation means 7...Transportation aircraft

Claims (2)

[Claims] (1) Place fresh tea leaves in a sealable container, replace the air in the container with oxygen-free gas such as nitrogen or carbon dioxide, place the fresh tea leaves in an oxygen-free environment, and lower the ambient temperature. A method for processing fresh tea leaves, which involves heating the tea leaves to 20 to 90°C, storing them as they are for 1 to 5 hours, and then taking out the fresh tea leaves and producing tea using a normal tea production method. (2) One side and the other side are provided with a green tea leaf inlet and a tea leaf outlet each equipped with an isolation mechanism from the outside air, and the other side and the other side are each provided with a replacement gas supply port and an internal air exhaust port, and the atmosphere a closed container equipped with a heating means, a means for generating a gas not containing oxygen such as nitrogen or carbon dioxide communicated with the supply port, a transporter for carrying out the tea leaves provided under the above-mentioned outlet, and a transporter. A tea leaf processing device consisting of a tea processing means arranged at the front end of the tea leaf processing device.