JP-7855500-B2 - Roasting equipment

JP7855500B2JP 7855500 B2JP7855500 B2JP 7855500B2JP-7855500-B2

Inventors

上田昌史
渡邉玲

Assignees

ダイニチ工業株式会社

Dates

Publication Date: 20260508
Application Date: 20221208

Claims (3)

The main unit has an air intake and an exhaust port, A blower is provided in the air passage from the intake port to the exhaust port, A heating unit is provided within the aforementioned air passage to heat the air passing through it, It comprises a bottomed cylindrical roasting kettle that contains the roasting material inside, Multiple openings are provided on the side of the roasting kettle, arranged circumferentially, for taking in air heated in the heating section. The aforementioned opening is elongated in the height direction and is slit-shaped, extending diagonally. A roasting device in which the lower half has a larger opening area than the upper half.
The roasting kettle is provided in conjunction with the opening and includes a deflection section that protrudes inward from the roasting kettle and directs air into the opening. For each of the aforementioned openings, the deflection portion adjacent to it in the direction of airflow within the roasting chamber is designated as the first deflection portion. The opening has a maximum portion where the opening width is greatest, The roasting apparatus according to claim 1, wherein the opening portion below the maximum portion does not face the first deflection portion.
The roasting apparatus according to claim 2, wherein the opening and the deflection portion are formed by louver processing.

Description

This invention relates to a roasting apparatus for roasting coffee beans and the like. Conventionally, roasting apparatuses are known that comprise an airflow path from an intake port to an exhaust port, a roasting kettle containing the roasted material, a blower that supplies air to the airflow path, and a heating unit that heats the air supplied to the roasting kettle. Roasting is performed by agitating the roasted material using the force of the airflow supplied to the roasting kettle. For example, as described in Patent Document 1, there are roasting apparatuses that include a roasting chamber (roasting kettle) with a chamber barrel and an air intake ring on the bottom plate, with the air intake ring enclosed within the chamber barrel, creating an annular airflow passage between the chamber barrel and the air intake ring. A second air intake port is provided on the air intake ring, which forms the side of the roasting chamber, allowing air to be drawn into the roasting chamber for roasting. Special Publication No. 2022-524565 This is a perspective view of a coffee bean roasting apparatus, which is an example of a roasting apparatus according to this embodiment.This is a cross-sectional view of a coffee bean roasting apparatus, which is an example of a roasting apparatus according to this embodiment.This diagram shows the airflow path of a coffee bean roasting apparatus, which is an example of a roasting apparatus according to this embodiment.This is an external view of the roasting kettle in this embodiment.This figure shows the shape of the opening in this embodiment.This is a schematic diagram showing the positional relationship between the maximum part and the first deflection part. A preferred embodiment of the present invention will be briefly described, illustrating its operation. This invention relates to a roasting apparatus comprising a main body, a blower installed in an air passage from an air intake to an exhaust port, a heating unit installed in the air passage for heating the passing air, and a bottomed cylindrical roasting tub for housing the roasted material. Multiple openings are provided on the side of the roasting tub, arranged circumferentially, for taking in air heated by the heating unit. These openings are elongated in the height direction and are slit-shaped, extending diagonally, with the lower half having a larger opening area than the upper half. The roasted material is roasted while being agitated by the air taken in through the openings. However, the roasted material near the bottom of the roasting tub is less easily agitated due to the weight of the roasted material above it. Therefore, by increasing the opening area of the lower half of the openings, more air is supplied to the roasted material near the bottom of the roasting tub, allowing for sufficient agitation of the roasted material inside the tub. Furthermore, the roasting drum is equipped with deflection sections that protrude inward from the openings and direct airflow into the openings. For each opening, the deflection section adjacent to it in the direction of airflow within the roasting drum is designated as the first deflection section. Each opening has a maximum width, and the portion of the opening below this maximum width does not face the first deflection section. The largest amount of air is drawn into the roasting drum at the maximum width. By preventing the portion of the opening below the maximum width from facing the first deflection section, the air drawn in from the maximum width can flow smoothly towards the bottom of the roasting drum, efficiently agitating the roasted material near the bottom of the drum. Furthermore, the opening and deflection section are formed by louver processing. This makes it easy to create a structure where the opening and deflection section are paired.