JP4332614B2 - Production method of crude tea - Google Patents

Description

    The present invention relates to a method for producing crude tea, and more particularly, to a method for producing crude tea that has good manufacturability that is not affected by the weather conditions of plucking and that can also obtain good quality crude tea.

The method for producing crude tea is to steam the fresh tea leaves with a steamer, cool the steamed leaves with a cooler so that the fresh tea leaves do not oxidize, cool, dry with a coarse kneader, dry, Apply force to the leaves with a rice cake machine to homogenize the moisture, and then dry the leaves with hot air while mowing the leaves again with a medium rice cake machine. Tea is dried to produce crude tea (for example, see Non-Patent Document 1).
Published by Shogakukan The University of Japan Encyclopedia 15 p330-p336

By the way, when making crude tea, if the raw leaves that are raw materials are plucked tea that is picked on a rainy day, the amount of moisture is large and steamed to a high temperature with a steamer to remove moisture on the surface of the fresh leaves. I have to. As a result, in the case of dew tea, the color of the tea as a product is not good, and there is a problem that the picking of fresh leaves is limited to a day with good weather.
In addition, as described above, if there is moisture on the surface of the fresh leaves, the color of the tea as a product is not good, and thus there is a problem that the fresh leaves cannot be washed even though the fresh leaves are exposed to the atmosphere. .
An object of this invention is to provide the manufacturing method of the rough tea which was made to remove said trouble.

The method for producing crude tea according to claim 1 includes a washing step of washing the picked tea leaves with water, a draining step of cutting off water adhering to the tea leaves washed in the washing step, and draining in the draining step. The cutting process for cutting the tea leaves, the tea leaves cut in the cutting process are guided to a microwave heating machine, and the microwave irradiation process for irradiating the tea leaves with microwaves; comprising a cooling step of cooling the tea leaves that have been irradiated waves, a step kneading massage the tea leaves that have been cooled in this cooling step, a drying step of drying the tea leaves were rubbed with this kneading step, the microwave The heater consists of a magnetron that emits microwaves at the top, a transfer conveyor formed under the magnetron with a Teflon (registered trademark) transfer surface, Tea leaves provided with Teflon (registered trademark) to be placed, and tea leaves on the conveyor are irradiated with the microwave while being transported, and held in a sandwich by the conveyor and the guide surfaces Is guided to the cooling step while maintaining the steamed state .

The method for producing crude tea according to claim 2 includes a cutting step of cutting dew tea picked on a rainy day, and the dew tea cut in this cutting step is guided to a microwave heater, A microwave irradiation step of irradiating the microwave with tea, a cooling step of cooling the dew tea that has been irradiated with microwaves in this microwave irradiation step, and a step of squeezing the dew tea cooled in this cooling step; A drying step of drying the dew tea brewed in this squeezing step, and the microwave heater includes a magnetron that radiates microwaves at an upper portion thereof, and a Teflon (registered trademark) having a conveying surface under the magnetron. And a guide surface formed of Teflon (registered trademark) located on the conveyor, and the microwaves are irradiated while the dew tea on the conveyor is being conveyed. It is, dew tea held in sandwich by the guide surface and the conveyor, while retaining the stuffiness state, are intended to be led to the cooling step.

    Since the picked tea leaves are washed with water in the washing process, foreign matter adhering to the tea leaves can be removed, and even if moisture adheres to the surface of the tea leaves, “microwave irradiation that irradiates microwaves to the tea leaves” In the "process", the tea leaf can be efficiently heated from the inside and outside by the moisture adhering to the surface of the tea leaf and the moisture existing inside the tea leaf, and the green color of the tea as a product can also be obtained. . As a result, it is possible to obtain rough tea with good manufacturability that is not affected by the weather conditions to be picked and with good quality.

In addition, according to the method for producing rough tea according to claim 2, in the case of dew tea picked on a rainy day,
Foreign matter adhering to dew tea has been removed by rain and does not need to be washed, and even if moisture adheres to the surface of dew tea, dew in the “microwave irradiation process of irradiating microwaves to tea leaves” Due to the moisture adhering to the surface of the tea and the moisture existing inside the dew tea, the dew tea can be efficiently heated from the inside and outside, and the green color of the tea as a product can also be obtained. As a result, it is possible to obtain rough tea with good manufacturability that is not affected by the weather conditions to be picked and with good quality.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a machine used in each process for carrying out a method for producing crude tea, wherein 1 is a washing / draining machine that performs a washing process and a draining process, and the washing / draining machine 1 is a tea leaf. An inlet 11, a rotary drum 12 that receives tea leaves introduced through the tea leaf inlet 11, and a cleaning water supply member 13 that is located in the rotary drum 12 and supplies cleaning water to the conveyed tea leaves And a drain guide 14 for draining the cleaning water.
The picked tea leaves are put into the rotating drum 12 through the tea leaf inlet 11, and the tea leaves in the rotating drum 12 rotated by the washing water from the washing water supply member 13 are washed (washing process) and attached to the tea leaves. The foreign matter is removed together with the cleaning water from the opening provided on the side surface of the rotary drum 12.
The tea leaves are rotated in the rotary drum 12 and supplied with washing water from the washing water supply member 13.
After the cleaning, the supply of cleaning water from the cleaning water supply member 13 is stopped. At the same time, the rotating drum 12 rotates at a higher speed than the rotation at the time of washing the tea leaves, and the water adhering to the tea leaves washed in the washing process is drained from the opening provided on the side surface of the rotating drum 12 and the water is cut off. (Draining process).

2 is a cutting machine (for example, chopper) that cuts tea leaves drained in the draining process (cutting process), and cuts the tea leaves into small pieces, for example, about 10 mm to 20 mm at the longest.
The drained tea leaves are supplied from the top of the chopper 2 by the first transport conveyor K1 and fall on the rotating rotary blades 21 and 21 to be cut. The cut tea leaves are transported by the transport unit 22 to the second transport conveyor K2.

The tea leaves transported to the second transport conveyor K2, that is, the tea leaves cut in the cutting process, are guided to the microwave heater 3 and irradiated with microwaves (microwave irradiation process).
The microwave heater 3 includes a magnetron that emits microwaves at an upper portion (not shown), a transfer conveyor 31 having a transfer surface formed of Teflon (registered trademark) under the magnetron (not shown), A guide surface 32 formed of fixed Teflon (registered trademark) located above is provided, and the tea leaves on the conveyor 31 are irradiated with microwaves while being conveyed, and the conveyor 31 and the guide surfaces 32 (of the microwaves) Vapor generated by heating due to irradiation is held in a sandwich shape by a transfer conveyor 31 having a transfer surface formed of Teflon (registered trademark) and a guide surface 32 formed of Teflon (registered trademark). The tea leaves are guided to the cooling process of the next process by the third conveyor K3 while maintaining the steamed state.

    The tea leaves irradiated with microwaves in the microwave irradiation process are cooled by the cooler 4 (cooling process). In the cooler 4, the tea leaves conveyed by the conveyor 41 are cooled by outside air by the fan 42.

    The tea leaves cooled in the cooling process squeeze the tea leaves via the fourth transport conveyor K4 (smearing process), and are guided to, for example, the well-known machine 5. The machine 5 is strongly squeezed so as to apply force to the tea leaves to lift the moisture of the leaves.

The tea leaves picked up in the squeezing process are transported to a dryer 6 (drying process) for drying the tea leaves by a transport means (not shown).
In order to store tea for a long period of time, the dryer 6 supplies hot air of about 80 ° C. to the tea leaves so as to have a moisture content of 5 to 6%, for example, and is contained in the tea leaves via the fifth conveyor K5. It is sent to the sorter 7 for removing impurities, and sent out from the sorter 7 to obtain rough tea.

The tea leaves that can be used in the method for producing rough tea are not limited to the first and second teas, but are also effective for the autumn / winter days when the moisture content is low (tea leaves that have been cut in autumn or winter). They are crushed and used as tea packs, leaf tea, and drink ingredients for different purposes.
In the present invention, in the case of dew tea picked on a rainy day, the above-described washing step and draining step can be omitted.
The manufacturing method of rough tea in such a case includes a cutting process for cutting the dew tea picked on a rainy day, a microwave irradiation process for irradiating the dew tea cut in this cutting process with a microwave, A cooling step for cooling the dew tea that has been irradiated with microwaves in a microwave irradiation step, a step for brewing the dew tea cooled in this cooling step, and a drying step for drying the dew tea brewed in this step Process.

FIG. 1 is an explanatory view schematically showing a machine used in each process for carrying out an embodiment of the present invention.

Explanation of symbols

1 Washing and draining machine 2 Cutting machine 3 Microwave heating machine 4 Cooling machine 5 Dredge machine 6 Drying machine

Claims (2)

A washing process of washing the picked tea leaves with water;
A draining step of cutting off the water adhering to the tea leaves washed in this washing step;
A cutting step of cutting the tea leaves drained in this draining step;
The tea leaves cut in this cutting step are guided to a microwave heater, and a microwave irradiation step of irradiating the tea leaves with microwaves,
A cooling step of cooling the tea leaves irradiated with microwaves in this microwave irradiation step;
A step of massaging the tea leaves cooled in this cooling step;
A drying step of drying the tea leaves brewed in this kneading step ,
The microwave heater includes a magnetron that emits microwaves at the top, a transfer conveyor having a transfer surface formed of Teflon (registered trademark) under the magnetron, and a Teflon (registered trademark) positioned on the transfer conveyor. The tea leaves on the transport conveyor are irradiated with the microwave while the tea leaves on the transport conveyor are transported, and the tea leaves held in a sandwich shape by the transport conveyor and the guide surfaces maintain a stuffy state. However , the manufacturing method of the rough tea characterized by being led to the said cooling process . A cutting process for cutting the dew tea picked on rainy days;
The dew tea cut in this cutting step is guided to a microwave heater, and a microwave irradiation step of irradiating the dew tea with microwaves,
A cooling step of cooling the dew tea irradiated with microwaves in this microwave irradiation step;
A step of brewing the dew tea cooled in this cooling step;
A drying step of drying the dew tea brewed in this kneading step ,
The microwave heater includes a magnetron that emits microwaves at the top, a transfer conveyor having a transfer surface formed of Teflon (registered trademark) under the magnetron, and a Teflon (registered trademark) positioned on the transfer conveyor. The dew tea on the transport conveyor is irradiated with the microwave while the dew tea on the transport conveyor is transported, and the dew tea held in a sandwich shape by the transport conveyor and the guide surface is in a steamed state. A method for producing crude tea, which is guided to the cooling step while being held .

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