JPH0144077Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a coffee bean roasting machine for roasting green coffee beans.

(Prior Art) A conventional coffee bean roasting machine stores green coffee beans in a truncated cone-shaped rotating drum, and uses a heater installed below the rotating drum separately from the rotating drum. The raw beans are then roasted (Special Publication No. 56-19986).

(Problems to be Solved by the Invention) However, in such conventional coffee bean roasting machines, the heater is provided separately from the rotating drum, resulting in a complicated structure and increased cost. In addition, the green coffee beans are stored in a truncated cone-shaped rotating drum and roasted using a heater installed below the rotating drum, so the green coffee beans are evenly cooked. Moreover, it was difficult to roast the beans to the center.

This invention was devised to solve the above-mentioned problems.The purpose of this invention is to reduce costs by simplifying the structure, and to heat the green beans evenly to make the beans. This is so that it can be roasted until it reaches the center.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides electrodes 9, 9 of the heater 8 on the circumferential surface of the drum 2,
A conductive material 10 is coated between the electrodes 9.

(Function) According to the above means, the green beans 7 in the drum 2 are uniformly heated from a wide range by the heater 8 on the circumference of the drum 2, and the green beans 7 are roasted to the center.

(Embodiment) Next, a preferred embodiment of the present invention will be described based on the attached drawings.

FIG. 1 is a longitudinal sectional view of a coffee bean roasting machine according to the present invention.

In the figure, reference numeral 1 indicates a coffee bean roasting machine, and a cylindrical drum 2 made of glass, ceramics, or the like is fixed in the coffee roasting machine 1 with its axial direction horizontal. Inside the drum 2, a plurality of stirring blades 5 are provided facing the inner peripheral surface of the drum 2 via support pieces 4 fixed to the rotating shaft 3. The stirring blades 5 are rotated by a motor 6 provided outside the drum, and stir the green coffee beans 7 stored in the drum 2. Further, as shown in FIG. 2, on the outer peripheral surface of the drum 2, electrodes 9, 9 of a heater 8 are attached to both ends in the circumferential direction, respectively, in the form of a band.
A conductive material 10, such as an oxide film, is coated and baked between the spaces 9, and far infrared rays are emitted when electricity is applied. Incidentally, the heater 8 may be divided and provided at intervals in the circumferential direction of the outer peripheral surface of the drum 2, as shown in FIG. Further, the heater may be provided on the inner peripheral surface of the drum.

A green bean insertion port 12 is formed in the upper part of the coffee roasting machine 1 and is opened and closed by an opening/closing door 11. Hole 2a provided on the side
It is then stored in the drum 2. Further, a catalyst 15 operated by a heater 14 is provided next to the opening/closing door 11, and exhaust smoke generated in the drum 2 during roasting is guided through an exhaust duct 16, treated, and discharged to the outside.

A blower fan 17 driven by a motor 6 is provided at the bottom of the coffee roasting machine 1 , and the airflow generated by the blower fan 17 is transferred to a blower duct 18 provided below the drum 2 and to the drum 2 . The air is guided into the drum 2 through a hole 2b on the side of the drum 2 via a blow duct 19 provided on the side. The airflow guided into the drum 2 blows off the thin skin 20 separated by roasting the green beans 7, and blows away the thin skin 20 separated by the roasting of the green beans 7.
6, and is collected into a collection container 21 provided on the side of the coffee roasting machine 1. Further, a hole 2c is provided in the lower side of the drum 2, and a door 22 that can be opened and closed is provided outside the hole 2c. A storage container 23 for storing roasted coffee beans is provided below the ventilation duct.

Next, the operation of the present invention will be explained. Hole 2 of drum 2
After closing the opening/closing door 22 of c, green coffee beans 7 are introduced from the green bean insertion port 12 and stored in the drum 2 through the guide passage 13. Turn on the power and rotate the stirring blades 5 to stir the green beans 7, and at the same time, the heater 8 coated on the outer peripheral surface of the drum 2
By emitting far infrared rays and uniformly heating the green beans 7 from a wide range, the green beans 7 can be roasted to the center by the far infrared rays. raw beans 7
The skin 20 is separated by roasting, and exhaust smoke is generated, which is blown away by the airflow generated by the blower fan 17, passes through the exhaust duct 16, and is treated with the catalyst 15. After being discharged to the outside, the thin skin 20 is stored in a collection container 21. After roasting is completed, the power to the heater 8 is turned off, and the blower fan 17 is adjusted by an air volume controller (not shown) to generate a large amount of powerful cold airflow to blow the drum 2.
The roasted coffee beans are cooled all at once. After cooling is completed, the opening/closing door 22 is opened, and the coffee beans are sent out through the holes 2c of the drum 2 by airflow and stored in the storage container 23.

(Effects of the invention) As detailed above, according to the invention, the electrodes of the heater are mounted on the peripheral surface of the drum, and a conductive material is coated between the electrodes, so the structure is simple and installation is easy. Therefore, it is possible to reduce manufacturing costs. Furthermore, since the heater is coated on the circumferential surface of the drum, the coffee beans can be evenly roasted evenly to the center.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention.
2 is a longitudinal sectional view of a coffee bean roasting machine according to the present invention, FIG. 2 is a perspective view of a drum coated with a heater, and FIG. 3 is a perspective view of another embodiment of the drum. In addition, in the drawing, 1 is a coffee bean roasting machine,
2 is a drum, 7 is green coffee beans, and 8 is a heater.

Claims (1)

[Claims for Utility Model Registration] In a coffee bean roasting machine that uses a heater to roast green coffee beans stored in a drum, an electrode of the heater is mounted on the circumferential surface of the drum, and there is a wire between the electrodes. A coffee bean roasting machine characterized by being coated with a conductive substance.