JPH0226311Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a drying device for tea production that is capable of efficiently drying raw material tea with a rich color and aroma.

(b) Conventional technology and problems to be solved by the present invention In the conventional tea drying device, raw materials are heated on the inner circumferential surface of a rotating cylinder heated by a heater such as a gas burner in a roasting chamber fixed to the machine frame. A spiral band for transporting the processed tea is provided, and a plurality of electric far-infrared radiant ceramic heaters each having an inverted V-shaped section to prevent the accumulation of raw tea are installed inside the rotating cylinder, and the rotating cylinder is provided with a spiral band for transporting the processed tea. By feeding raw tea and rotating the rotary tube, while the raw tea is transferred from one side of the rotary tube to the other, heat conduction from the rotary tube heated by the heater and radiation from the far infrared radiation ceramic heater are carried out. This method dries the raw tea using far infrared rays, but this type of equipment has the disadvantage that the far infrared radiant ceramic heater has an insufficient amount of heat, making it impossible to dry the raw tea efficiently and sufficiently. It was hot.

(c) Means for solving the problem In view of the above-mentioned drawbacks of the conventional technology, the present invention has developed a system that uses a rotary cylinder that is heated by a heater such as a gas burner in a roasting chamber fixed to the machine frame. A spiral band is provided for transporting the raw material tea, a heating tube is inserted into the inner lower part of the rotating cylinder, a rotating shaft that is rotated at low speed by a motor is protruded from one end of the heating tube, and this rotating shaft is attached to the machine frame. A receiving pipe is connected to the other end of the heating pipe, and this receiving pipe is rotatably connected to a hot air discharge pipe of a hot air generator supported on a machine frame. An exhaust fan is provided on the upper part of the outside, and the tip of a forced exhaust pipe connected to this exhaust fan is inserted into the rotary cylinder from one side, and hot air is supplied into the heating pipe by a hot air generator, and the heating pipe is heated. By rotating at a low speed, the raw tea supplied into the rotary cylinder is prevented from accumulating on the upper surface of the heating tube without using a member with an inverted V-shaped cross section to prevent the accumulation of raw tea.
In addition, it is possible to use a heating tube with the largest possible diameter that can be inserted into the rotating cylinder, and a sufficient amount of radiant heat is generated from the surface of the heating tube and transferred from one side of the rotating cylinder to the other side. Radiant heat can be uniformly applied to the raw material tea, and this radiant heat and heat conduction from the rotating tube heated by the heater can efficiently dry the raw material tea and create a finished tea with rich color and aroma. It was made possible.

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

In the figure, 1 is a roasting chamber fixed to the machine frame 2, and the required number of heaters 3 such as gas burners are installed at the bottom of the roasting chamber, and the heating temperature can be freely adjusted by adjusting the number of heaters 3 used or the heating power. It is arranged like this.

Reference numeral 4 denotes a rotary cylinder supported by a known support trochanter (not shown) and placed horizontally above the heater 3 in the roasting chamber 1. A rotating mechanism 7 such as a gear is provided which is driven by a motor 6 attached to the machine frame 2, and a spiral band 8 for transporting the raw material tea is provided on the inner peripheral surface.

Reference numeral 9 denotes a heating tube having a corrugated annular cross section inserted into the inner lower part of the rotary cylinder 4, and a radial support 10 is inserted into the opening at one end of the heating tube.
Alternatively, a perforated plate not shown in the drawings is fixed, a rotary shaft 11 is protruded from the center of the support 10 or the perforated plate, this rotary shaft is supported by a bearing 12 attached to the machine frame 2, and the rotary shaft 11 is A gear 13 is attached to the gear 13, and a gear 15 attached to the main shaft of a motor 14 with a reduction gear attached to the machine frame 2 is meshed with the gear 13, and a receiver tube 16 is connected to the other end of the heating tube 9. This tube 1
6 is rotatably connected to a hot air discharge pipe 20 in a hot air generator 19 comprising a gas burner 17 supported on the machine frame 2 and blowing air 18.

Reference numeral 21 denotes an exhaust fan installed at the upper part of the outside of the roasting chamber 1, and the tip of a forced exhaust pipe 22 connected to the exhaust fan 21 is inserted into the rotary cylinder 4 from one side thereof.

Reference numeral 23 denotes a chute for feeding the raw material tea, which is attached to one side of the roasting chamber 1, and 24 is a chute, attached to the other end of the roasting chamber 1, for discharging the manufactured tea.

Since the device according to the present invention is configured as described above, by starting the motor 6 and the motor 14, the rotating cylinder 4 and the heating tube 9 are rotated, and the hot air generator 19 and the exhaust fan 21 are activated. Furthermore, after igniting the heater 3, if the raw material tea is supplied from the feeding chute 23 to the inside of one side of the rotary cylinder 4, the raw material tea will be transferred to the adjacent spiral band 8 for transfer.
The raw tea leaves are gradually transferred to the other side of the rotary tube 4 while being stored in the chamber, and while being transferred, the raw material tea is heated by heat conduction from the rotary tube 4 heated by the heater 3. At the same time, the hot air generator 19
The heating tube 9 is heated by the radiant heat generated from the surface of the heating tube 9 heated by the hot air supplied from the heating tube 9, and the contained moisture and steamy incense are dissipated. Since the tea is sucked into the forced exhaust pipe 22 and quickly discharged to the outside of the rotary cylinder 4, the tea is efficiently dried with a rich color and aroma and is discharged from the discharge chute 24.

The heating tube 9 is not limited to the heating tube with a corrugated annular cross section as shown in the above embodiment, but when a heating tube with a corrugated annular cross section is used, its surface area is smaller than that of a normal pipe. Since the area is extremely wide, it is possible to efficiently generate radiant heat.

(E) Effects of the invention The tea drying device according to the invention has a heating tube inserted into the inner lower part of the rotating tube as described above, and a rotary shaft that is rotated at low speed by a motor protruding from one end of the heating tube. This rotating shaft is supported by a bearing attached to the machine frame, a receiving pipe is connected to the other end of the heating tube, and this receiving pipe is supported by the machine frame to freely rotate the hot air discharge pipe of the hot air generator. By connecting the heating tube to the inner lower part of the rotating cylinder, the heating tube is rotated at low speed at the inner lower part of the rotating cylinder, and hot air is passed through the inside of the heating tube to generate radiant heat from the surface. During the process of transferring the raw raw tea to the other side, there is no risk that the raw raw tea will accumulate on the heated heating tube, so high-quality manufactured tea can be reliably produced without producing defective tea. It is possible.

However, since there is no need to use a member that prevents the accumulation of raw tea leaves with a V-shaped cross section as in the past, it is possible to use a heating tube with as large a diameter as possible inside the rotating cylinder, so a sufficient amount of heat can be radiated from the surface of the heating tube. It is possible to generate heat and uniformly apply radiant heat to the raw tea material being transferred from one side of the rotary cylinder to the other, so that the heat generated by the heat conduction from the rotary cylinder heated by the heater can be Combined with this, it is possible to efficiently dry the raw material tea and produce tea with rich color and aroma.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway longitudinal sectional front view of the tea drying device according to the present invention. FIG. 2 is a sectional view taken along the line A--A shown in FIG. 1. In the figure, 1 is a roasting chamber, 2 is a machine frame, 3 is a heater, 4 is a rotating cylinder, 6 is a motor, 7 is a rotating mechanism, 8 is a spiral band for transfer, 9 is a heating tube, 11 is a rotating shaft, and 12 is 14 is a motor, 16 is a receiving pipe, 19 is a hot air generator, 20 is a hot air discharge pipe, 21 is an exhaust fan, 2
2 is a forced exhaust pipe.

Claims (1)

[Scope of utility model registration request] A heater such as a gas burner is installed in the lower part of the roasting chamber fixed to the machine frame, a rotating cylinder that is rotated by a rotating mechanism is installed above it, and a spiral band for transporting the raw material tea is installed on the inner peripheral surface of this rotating cylinder, A heating tube that generates radiant heat from the surface is inserted into the lower part of the rotating tube. A rotating shaft that rotates at a low speed is protruded from one end of the heating tube. This rotating shaft is supported by a bearing attached to the machine frame, and the heating A receiving pipe is connected to the other end of the pipe, and this receiving pipe is rotatably connected to the hot air discharge pipe of the hot air generator supported by the machine frame. A drying device for tea production, in which the tip of a forced exhaust pipe connected to the exhaust fan is inserted into the rotary cylinder from one side.