JPS6192533A - Medium rolling of tea leaf in tea-processing - Google Patents

Abstract

PURPOSE:To prepare tea leaves having excellent quality and free from stuffy smell, etc., by carrying out the tea-processing while keeping the pressure in the drying vessel and the rolling drum of a medium rolling machine to a level lower than the atmospheric pressure. CONSTITUTION:The kneaded tea leaves are charged through the charging port 14, the chute 17 and the charging cylinder 4 to the rolling cylinder 1 of the medium rolling machine 2, and the drying vessel 9 is sealed by closing the lid 13. The exhaust fan 11 is operated to exhaust the air in the vessel 9 and keep the pressure in the vessel 9 to a level lower than the atmospheric pressure. At the same time, the air in the chamber 20 of the vessel 9 is introduced through the suction duct 18 to the heating apparatus 22, heated, introduced into the rolling cylinder 1 through the exhaust duct 19 and the port 5 opening at the side wall of the medium rolling machine 2, and made to contact with tea leaves scattered under the rolling force applied by the rotating rolling arms. The humidified air is discharged through the exhaust cylinder and the top opening of the fan case 7 to the chamber 20, subjected to the humidity and temperature control with the humidity controller 24 and the temperature controller 23, and recycled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tea manufacturing method for forming tea leaves that have undergone a soft twisting process.

[Conventional technology]

Traditionally, the Chuliang method for tea production involves increasing the temperature of the tea by hot air or direct heating while applying mechanical forces such as softening or diffusion.
Shaping is performed while gradually drying at around 40°C.

[Problem that the invention seeks to solve]

In the conventional method, it is necessary to carefully dry the tea leaves while maintaining a temperature of about 36 to 40 degrees Celsius during tea processing to prevent the progress of surface drying. If this is not done, the tea leaves will change color, turn yellow, and lose their shape. This results in poor quality, resulting in fine powder and a grassy or stuffy taste, resulting in quality deterioration.

[Means for solving problems]

Tea leaves are processed in a reduced pressure atmosphere that is lower than atmospheric pressure to promote the evaporation of water, and to quickly move the internal water contained in the tea leaves to the surface, reducing the release of the contained water. By increasing the height, drying and shaping operations can be carried out rationally, thereby reducing factors that cause quality deterioration such as stuffiness.

[For production]

The tea leaves that have completed the soft twisting process, which is the previous process, are passed through the opening/closing lid 13 of the input port 14 provided in the drying container 9 through the input chute 17 through the input tube 4 to the beam side of the medium softener 2. After dropping a certain amount into the container 1, open and close the lid 1 of the input port 14.
3je is closed, the middle softening machine 2, the exhaust fan 11, the blower 21 in the circulation heating circuit A, and the heating device 22 are started, thereby starting the middle beam process.

The air inside the sealed drying container 9 is discharged to the outside by the exhaust fan 11, and the air pressure inside the drying container 9 is maintained at a reduced pressure state lower than the atmospheric pressure. Air in the space inside the chamber 20 of the drying container 9 is sucked in through the suction duct 18, heated by the heating device 22, and while being heated and rectified, the air is sent through the discharge duct 19 to the beam side from the air inlet 5 on the side of the medium softening machine 2. The tea leaves are blown into the chamber, rotated, and spread under soft pressure by the hand.The tea leaves contact with the diffused tea leaves, which evaporate the moisture of the tea leaves and lower the temperature due to the latent heat of evaporation, while conversely raising the humidity and discharging The hot air C is discharged from the top opening of the fan case 7 into the chamber 20 of the drying container 9 via the cylinder 6, and repeats circulation while being heated under the control of the temperature regulator 23 while evaporating the moisture in the tea leaves. , in order to gradually increase the temperature, a humidity regulator 24 provided in the drying container 9 detects the humidity, and an external suction valve mechanism 25
The center beam process is continued while maintaining the ventilation inside the drying container 9, which is sealed and under reduced pressure, by communicating with the operator or manually controlling the opening degree to maintain the reduced pressure state.

The airflow characteristics of an exhaust fan include resistance (static pressure loss) on the suction side.
When the value exceeds a certain value, the amount of air exhausted becomes zero, and conversely, as the suction resistance decreases, the amount of air exhausted increases, and when the suction resistance becomes zero, the amount of exhausted air becomes maximum. Therefore, when the outside air suction valve mechanism 25 is fully opened by continuously operating the exhaust fan 11 of this drying phrase 9, the pressure inside the drying container 9 is reduced below atmospheric pressure, and when it reaches a certain value, the suction resistance reaches its maximum. Therefore, no ventilation is performed from the exhaust fan 11 and the exhaust fan runs idly, and no air enters or exits from the exhaust fan 11, and the inside of the drying container is isolated from the outside. If the inside of the drying container lives in the world of hemp, the outside air will be sucked into the room due to the pressure difference between the inside and outside of the drying container 9. The pressure difference decreases, indoor air is exhausted, and the amount of exhausted air increases or decreases automatically in proportion to the amount of intake air, that is, the opening degree of the outside air intake valve mechanism 2.

At the end of the middle beam process, the discharge R3 provided on the rotating beam side 1 is automatically opened and the vibrating conveyor 8 is started, and the tea leaves that have fallen onto the vibrating conveyor 8 are collected at the end of the drying container 9. The opening/closing i15 of the discharge port 16 is opened and discharged to the outside of the drying container 9. After the discharge is completed, the opening/closing lid 15 is closed to seal the inside.

〔Example〕

1 is the rotary beam side of the medium softener 2, and the beam side 1 of B is equipped with a discharge R3 that can be opened and closed, the input tube 4 and the hot air blowing port 5 are installed on the negative side, and the fan with a built-in fan is installed on the other side. The exhaust pipe 6 connected to the case 7 is attached. A vibrating conveyor 8 is provided at the lower part of the soft-softening machine for transporting the falling tea, and the vibrating conveyor 8 and the soft-softening machine are housed in a sealed space inside a drying container 9 made of a heat insulating material. The drying container 9 has an exhaust port 10
An exhaust fan 11 is provided at the exhaust port 10, and an exhaust pipe 12 is connected to the exhaust port 10.

Further, in the drying container 9, an input port 14 provided with an opening/closing lid 13 is connected to the input tube 4 of the soft softening machine 2 through an input chute 17, and a discharge port 16 is connected to the discharge end 8' of the vibrating conveyor 8. It is.

Furthermore, the indoor chamber 20 of the drying container 9 communicates with the suction duct 18 of the circulation heating circuit A, which is composed of an suction duct 18 and a discharge duct 19, and the discharge duct 19 of the circulation heating circuit A is connected to the hot air blowing port 5 provided in the passenger vehicle 1. Let me contact you. A blower 21 and a heating device 22 are provided in the circulation heating circuit A.
The heating device 22 is controlled by communicating with a temperature regulator 23 provided in the discharge duct 19.

1. The suction duct 18 of the circulation heating circuit A is provided with an outside air suction valve mechanism 25 connected to a humidity regulator 24 attached to the drying container 9.

〔Effect of the invention〕

In the present invention, tea processing is carried out by maintaining the air pressure inside the closed drying container, the room, and the beam side of the medium softening machine at a reduced pressure state lower than atmospheric pressure, so that the evaporation of water is promoted and the internal water content is reduced. By speeding up the movement to the surface and increasing the release of the contained moisture, drying and shaping operations can be performed rationally, and factors that cause quality deterioration such as stuffiness can be reduced. In other words, a high quality product can be obtained.

In addition, the temperature and humidity inside and outside of the tea making and softening machine can be adjusted and dust-proof measures can be taken by sealing the machine, which is advantageous in terms of automatic control.In addition, heat consumption can be significantly reduced and noise leakage to the outside can be reduced. There is an effect that can be achieved.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of an apparatus according to the tea manufacturing method according to the present invention. 1...Passenger 2...Medium soft machine 3...Ejection door 4.
・Injection tube 5...Hot air inlet 6...Exhaust tube 7・
...Fan case 8...Vibrating conveyor 9...Dry MJ Capacity N10...Exhaust port 11...Exhaust fan 12
...Exhaust tube 13.15...Opening/closing lid 14...Inlet port 16...Outlet port 17...Insertion chute 18
...Suction duct 19..Discharge duct 20..Drying container room 21..Blower 22.Heating device 23..Temperature regulator 24..Humidity regulator 25..Outside air intake valve mechanism A..Circulation heating Equipment: 1. , 1985, June 3, 1985 Gakudono Shiga, Commissioner of the Patent Office, 4. 1 Description of the case ゛゛Japanese Patent Application No. 59-213967 2, Name of the invention Seicha Chuliang method 3, Person making the amendment Relationship with the case Patent applicant Kuniyasu Okamura 4 Agent 5 Specification subject to amendment (Patent claim 6. Contents of the Amendment The scope of claims from page 1, line 4 of the specification of the present application to page 2, line 12 will be amended as follows. Record

Claims (1)

[Claims] The tea making and softening machine is stored inside a sealed drying container, and the indoor air of the drying container, which has a sealed closed space, is continuously forced out to the outside by operating an exhaust fan to achieve sealed drying. While maintaining the pressure inside the container and the soft body of the medium soft machine stored in the inside of the drying container in a reduced pressure state lower than atmospheric pressure, a circulation heating circuit consisting of a blower, a heating device, and a duct is installed in the drying container in the reduced pressure state. By connecting one side to the room and the other to the tea softening machine, the air inside the drying container becomes a rectified and heated reduced-pressure hot air stream through the circulation heating circuit, and the tea making machine softened inside the drying container. The hot air is discharged from the hot air inlet of the machine into the inside of the tea making machine, and while it evaporates the moisture of the diffused tea leaves while being subjected to soft pressure by hands etc. as it rotates inside, the hot air increases the humidity, and the hot air increases the humidity of the tea making machine. The circulation of air being exhausted from the mouth into the inside of the drying container is repeated. Also, an outside air intake valve mechanism attached to the drying container or the circulating heating circuit and communicating with the outside may be opened and closed manually or in communication with a humidity regulator and a temperature regulator that detect the humidity and/or temperature of the circulating hot air flow. By opening and closing the outside air suction valve mechanism, outside air is sucked into the inside of the drying container or into the circulation heating circuit from the outside due to the pressure difference between the inside and outside of the drying container, while maintaining the depressurized state inside the drying container. A tea manufacturing/softening method characterized in that air inside the drying container corresponding to the amount of air taken in from the outside is discharged to the outside of the drying container together with evaporated moisture using an exhaust fan attached to the drying container.