JPH0149454B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a drying device for tea manufacturing which is also used as a pasteurization machine for tea manufacturing.

(b) Prior art and problems to be solved by the present invention Conventional drum-type drying equipment for tea production heats raw tea by heat conduction from a heated rotating drum. The parts that come into contact with the rotating drum tend to be partially heated more than necessary, and the inside of the rotating drum tends to get stuffy because the ventilation is not good, which causes the tea to discolor easily.

(d) Means for Solving the Problems In view of the above-mentioned conventional drawbacks, the present invention provides a heater such as a gas burner at the lower part of the roasting chamber fixed to the machine frame, and a cylindrical winding device above the roasting chamber. A rotary drum with a large number of belt-like blades tilted in the opposite direction to the direction of rotation and provided in the shape of a bamboo basket is installed between each facing surface of the spiral belt, and is rotatably provided by a rotating mechanism. By opening the mouth and the discharge port on the other side, raw tea is stored between adjacent spiral bands and is placed on the many blades that make up the rotary drum, and while being beaten, the raw tea is delivered from one side of the rotary drum. During this time, heated air in the roasting chamber heated by a heater such as a gas burner is allowed to enter the rotary barrel between the many band-shaped blades, and this heated air evenly coats the surface of the tea. The moisture content and steamy aroma emitted from the tea during drying are quickly discharged from between a large number of band-shaped blades to the outside of the rotary drum, thereby making it possible to finish the tea with a rich color and aroma of good quality.

(d) Embodiments and effects Embodiments of the present invention will be explained below with reference to the drawings.

1 in the figure is a roasting chamber fixed to the machine frame 2, with a discharge port 3 installed at the top and a required number of heaters 4 such as gas burners installed at the bottom. The heating temperature can be adjusted freely.

Reference numeral 5 denotes a rotating body in which a large number of band-like blades 7 are formed by bending slightly outward the ends of each facing surface of a spiral band 6 wound in a cylindrical shape, and are arranged in the shape of a cage by tilting them in the opposite direction to the rotation direction. The cylindrical parts 8, 8 are fitted into the machine frame 2, and the small-diameter pipe parts 10, 10 are attached to a plurality of support bones 9 fixed toward the center on the inner periphery of the cylindrical parts 8, 8.
By providing a rotation mechanism 12 such as a gear, which is supported by a known support trochanter (not shown in the drawings) attached to the machine frame 2 and driven by a motor 11 attached to the machine frame 2, on the outer periphery of the right small diameter tube section 10, It is rotatably provided above the heater 4.

Reference numeral 13 denotes a raw material tea supply device attached to the upper part of one side of the machine frame 2, and the tip of the tea production tube 14 in this supply device is inserted into the feed inlet 15 opened on one side of the rotary barrel 5. There is.

Reference numeral 16 denotes a tea discharge chute attached to the other end of the roasting chamber 1 in correspondence with the raw material tea discharge port 17 provided on the other side of the rotating barrel 5; 18, one end of which is fixed to the machine frame 2; A forced exhaust pipe inserted from the other side into the center of the interior, with a plurality of suction holes 19 on the bottom surface, and a material tea accumulation prevention member 20 with an inverted V-shaped cross section on the top surface.
The right extension is connected to an exhaust fan not shown in the drawings.

Reference numeral 21 denotes a heated air guide plate fixed in the roasting chamber 1 so that the heated air rides on a band-shaped blade 7 and rises toward the raw material tea a to be beaten.

In the embodiment shown in FIG. 3, reference numeral 7' denotes a band-shaped blade having a bifurcated tip.

Since the device according to the present invention is configured as described above, by operating the motor 11, the rotating mechanism 12 rotates the rotating barrel 5 to the left in FIG. 2, and the forced exhaust pipe 18 is extended to the right. After activating the exhaust fan (not shown in the drawing) connected to the chamber and igniting the heater 4, the raw tea supply device 13 is activated, and the inside of one side of the rotary barrel 5 is discharged from the feeding tube 14. When the raw material tea is supplied to , the raw material tea a is stored between the adjacent spiral belts 6 for transfer, rides on a large number of belt-like blades 7 on the lower right side of the rotary drum 5, and leaves the rotary drum 5 while being beaten. The air in the roasting chamber 1, which is heated by the heater 4 during this time, is transferred from one side of the rotary drum 5 to the other side in a state where it tends to be sent upward.
Since the tea enters into the rotary cylinder 5 through the
is uniformly heated by the heated air without being partially heated, and the contained moisture and odor are dissipated.
The tea is sucked into the suction hole 19 provided on the lower surface of 8 and discharged to the outside, or is discharged to the outside of the rotary drum 5 through a large number of band-like blades 7 and then discharged to the outside from the discharge port 3. is dried efficiently and uniformly with a rich color and aroma, and is discharged from the discharge sheet 16.

Although the forced exhaust pipe 18 was used in the above embodiment, it is not necessary to use it, but may be used as necessary.

Further, although the heated air guide plate 21 is not necessarily provided as described above, if it is provided, it is possible to effectively infiltrate the heated air into the rotary drum 5.

Further, the large number of band-shaped blades 7 constituting the rotating body 5 are not limited to the band-shaped blades whose tips are slightly bent outward as shown in the above embodiments.

Furthermore, when the tip of the band-like blade 7' is formed into a bifurcated shape as in the embodiment shown in FIG. This is something that can be further improved.

Further, the means for rotatably disposing the rotating drum 5 above the heater 4 is not limited to that shown in the above embodiment, and other means may be employed.

(E) Effects of the Invention As described above, the present invention uses a rotating body in which a large number of band-shaped blades are provided in a cage-like manner between the facing surfaces of a spiral band wound into a cylindrical shape and are inclined in the opposite direction to the rotation direction. The raw tea is stored between the adjacent spiral bands of this rotary drum, and is transferred from one side of the rotary drum to the other side while being placed on a number of belt-shaped blades and beaten.
During this time, air heated by a heater is allowed to enter the rotary drum between the many band-shaped blades, and this heated air dries the tea, and at the same time, the moisture and aroma released from the tea are transferred between the many band-shaped blades. Since the tea leaves are quickly discharged to the outside of the rotary drum, the heated air can dry the surface of the tea leaves uniformly and sufficiently, and the inside of the rotary drum does not get wet, so there is no risk of discoloration of the tea leaves. It is possible to produce high-quality tea with a rich color and aroma.

However, since the rotary drum according to the present invention uses a spiral band for transporting the raw material tea, the transport speed of the raw material tea can be adjusted by adjusting the rotation speed of the rotary drum, so it can be optimized depending on the quality of the raw material tea. It has the characteristics that the transfer speed can be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a device according to the present invention. FIG. 2 is a sectional view taken along line A-A shown in FIG. 1. FIG. 3 is a cross-sectional view of an embodiment of the band-like blade. In the figure, 1 is the roasting room. 2 is the machine frame. 4 is a heater. 5
is a rotating body. 6 is a spiral band. 7 is a band-shaped feather. 12 is a rotating mechanism. 15 is the feed port for the raw material tea. 17 is the discharge port for the raw material tea.

Claims (1)

[Scope of Claims] 1. A heating device such as a gas burner is installed in the lower part of the roasting chamber fixed to the machine frame, and a large number of belt-like blades are installed above the heating device in the rotating direction between each opposing surface of a spiral band wound into a cylindrical shape. A drying device for tea production, which comprises a rotary barrel that is tilted in the opposite direction and provided in the shape of a basket, and is rotatably provided by a rotating mechanism, and has an inlet for raw tea made on one side of the rotary barrel and a discharge port on the other side. . 2. The tea manufacturing and drying device according to claim 1, wherein the tips of a large number of band-like blades are formed into a bifurcated shape.