JPH09206050A - Coffee roaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coffee roaster effective for preventing the leak of cinder from the roaster by effectively recovering the cinder of the shell of coffee beans and dropping into the roaster body without inhibiting the exhaustion of gas through an exhaustion pipe. SOLUTION: This coffee roaster is provided with a casing 1 holding a rotary drum 7 driven by a driving apparatus 12 and a heat-source 13 for heating, an exhaustion pipe 24 to exhaust the gas containing cinders of coffee beans heated in the drum 7 from the roaster body and a fan 20 for guiding the exhaust to the exhaustion pipe 24. An inverted conical waste-removing pipe is placed in the exhaustion port of the exhaustion pipe 24 in a state detachable from the outside of the roaster and a number of perforations are opened on the wall of the waste-removing pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a coffee bean roaster, and more particularly, to prevention of scattering of grounds such as bean skin from an exhaust pipe of a coffee bean roaster for roasting green coffee beans. The improvement of the exhaust stack of the coffee bean roaster that can be performed.

[0002]

2. Description of the Related Art Usually, green coffee beans are roasted, and the roasted coffee beans are ground in a coffee mill, and then hot water is appropriately supplied to obtain a coffee beverage. The coffee bean roaster is usually provided with a cylindrical drum that is rotated by a drive device in a casing, a heat source for heating, and a device that adjusts the heating power of the heat source and the amount of air flowing in the casing. It is for roasting green coffee beans that are put into the drum. When the coffee beans are heated in the drum, the exhaust gas is discharged to the outside from the exhaust pipe provided in the roasting machine through the exhaust path along with the burning of coffee beans and the like.

[0003]

However, since the exhaust pipe of the conventional roasting device is a mere hollow tubular body, a large amount of burnt residue such as coffee bean peel contained in the exhaust is discharged outside the device. It is a cause of pollution of the surrounding environment.
In order to solve such a problem, it seems effective to arrange a flat plate-shaped and mesh-shaped filter at the tip of the exhaust pipe or the like to filter out burned dust, but it is 1 mm to several meters.
If a filter with small eyes is used to filter out various sizes of up to m, air permeability is deteriorated due to clogging and roasting ability is adversely affected. Therefore, a filter with large eyes must be used. However, when the eyes are large, there is a drawback that fine dust cannot be removed and the filter does not function as a filter. Therefore, even if the flat mesh filter as described above is used, the effect of effectively removing the burned dust discharged from the exhaust pipe cannot be expected. The present invention has been made in view of the above problems, by effectively removing the burnt residue of the coffee bean skin and dropping it into the container without inhibiting the amount of exhaust gas discharged from the exhaust stack. The object is to provide a roasting device in which burnt residue is prevented from being discharged outside the device.

[0004]

To achieve the above object, in the present invention, a drum rotated by a driving device and a heat source for heating are provided in a casing, and coffee heated in the drum is provided. In a coffee roasting machine equipped with an exhaust stack that discharges exhaust gas containing beans burned to the outside of the device, and a fan for guiding the exhaust gas to the exhaust stack, from the outside of the machine to the exhaust port of the exhaust stack It is characterized in that an inverted-cone-shaped scrap removing pipe is attached and a large number of holes are formed on the wall surface of the scrap removing pipe.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic front vertical cross-sectional view of a coffee bean roaster according to the present invention, and FIG. 2 is a front external view of the coffee bean roaster shown in FIG. First, the configuration of a coffee roaster according to the present embodiment will be described with reference to FIGS. 1 and 2. In FIG. 1, reference numeral 1 denotes a casing forming a closed space 2, a lower side surface of which is provided with a ventilation hole 3 for introducing outside air, and an upper side surface of the casing for exhaust gas that communicates with an exhaust pipe 24 described later. The opening 4 is provided.
The opening 4 is also in communication with a bean receiver 16 described later through an entrance shutter 17, and raw beans are introduced through the opening 4. Reference numeral 7 denotes a cylindrical drum rotatably supported and mounted inside the casing 1. A large number of small holes 8 are provided on the outer peripheral surface of the drum 7, and one bottom side of the cylindrical body is open. Is close to the casing side wall 9 and a part of the opening part is aligned with the opening part 4, and a side plate 10 is provided on the other bottom surface side. The drum 7 is mounted so that a shaft 11 is substantially horizontal, and the shaft 11 is rotatably connected by a drive device 12 provided outside the casing 1. A heat source 13 for heating the drum 7 is provided below the drum 7. The heat source 13 is a heat source whose heating power can be adjusted arbitrarily, and the case where the heating power of gas is used is shown in the drawing, but electric heating may be used.

Reference numeral 14 is a temperature sensor as a first temperature sensor which is attached to the side wall 9 of the casing and is provided so as to reach the central portion inside the drum 7. This temperature sensor 14
When the drum 7 is heated by, for example, the heat source 13 and rises to a certain temperature, the lamp is detected and the charging lamp 15 for instructing the charging of the green beans a is turned on.
The bean receiver 16 is provided outside the casing side wall 9, and its outer wall surface is inclined so that green beans can be put into the drum 7 through the entrance shutter 17 connected to the lower part and the opening 4 of the casing side wall 9. Is formed. That is,
By adjusting the opening and closing of the entrance shutter 17, it is possible to load the green beans stored in the bean pan 16 into the drum 7 in a desired amount. Reference numeral 18 denotes a cooling dish provided below the bean tray 16, and 19 denotes an outlet shutter provided on the casing side wall 9 for taking out the roasted beans from the drum 7 into the cooling dish 18. The opening 9A provided in the casing side wall 9 by operating the exit shutter 19
The beans roasted and roasted can be taken out from the drum 7 to the cooling dish 18.

Reference numeral 20 denotes a fan provided in the ventilation passage 21 in the bottom portion, which is connected to the motor of the drive unit 12 and rotates the fan 20 to remove air in the ventilation passage 21 and exhaust gas in the exhaust pipe 24. Suction and exhaust to the outside. As a result, the cooling dish 18 can be heated and the roasted coffee beans can be cooled and the inside of the drum 7 can be exhausted. Reference numeral 22 denotes an exhaust temperature sensor as a second temperature sensor mounted in the exhaust pipe 24, which is provided in the exhaust pipe 24 above the casing 1 at a position near the opening 9A provided in the casing side wall 9. Further, one end of the exhaust pipe 24 is opened in the vicinity of the opening 9A provided in the casing side wall 9, the upper end of the casing 1 is opened, and the other end of the exhaust pipe 24 is opened in the vicinity of the fan 20. To do. The damper 5 is provided upstream of the exhaust temperature sensor 22 in the exhaust pipe 24. Further, 27 is a bean take-out temperature switching lever for switching according to the roasting temperature of shallow roast for American coffee, medium roast for general use, and deep roast for ice coffee. The temperature can be changed by switching the switching lever 27. Reference numeral 26 is a heat quantity switching lamp, 28 is an extraction lamp, and 29 is a power switch. Next, reference numeral 30 is an exhaust pipe located further downstream of the exhaust fan 20 located at the end of the exhaust pipe 24. Inside the exhaust pipe 30, an inverted cone-shaped scrap removing pipe 31 is arranged. ing.

FIGS. 3 (a) and 3 (b) are a vertical sectional view and a plan view of the exhaust stack, and FIGS. 4 (a), 4 (b) and 4 (c) are a vertical sectional view, a plan view and a developed view of the residue removing pipe. It is a figure and this scrap removal pipe 31
Is a disc portion 33 that is locked by riding on a bolt 32 that projects from the upper inner wall of the exhaust pipe 30, and an inverted quadrangular pyramid shape that extends downward from a square opening 34 provided in the center of the disc portion 33. And a filter section 35. A large number of round holes 36 each having a predetermined diameter are formed through the disc portion 33 and the filter portion 35. The filter unit 35 does not necessarily have to have an inverted quadrangular pyramid shape,
Various other inverted pyramid shapes such as an inverted polygonal cone, an inverted cone, and an inverted star cone can be used. In addition, the inverted cone shape here does not have to be a cone shape having a precise lower end,
It also includes a so-called truncated cone shape whose tip is cut as shown in the figure.

Further, the hole 36 does not have to be a round hole, and various shapes such as a polygon such as a triangle or a square, an indeterminate shape, an oval, etc. can be applied. Also, it is not necessary that all holes have the same shape and the same size.
The diameter may be different. Further, the density of arranging the holes 36 may be uniform over the entire filter portion 35, or may be partially different. Waste collecting pipe 31
As a method of mounting the exhaust pipe 30 in the exhaust pipe 30, it may be mounted on the bolt 32 as shown in the drawing, or may be fixed by a bolt or the like. However, in consideration of cleaning the dust removing pipe 31, , It's convenient to simply put it on the bolt,
And it is enough.

When coffee beans are roasted in the roaster body while the waste collecting pipe 31 having the above-mentioned structure is arranged in the exhaust tube 30, burnt dust such as bean peel is exhausted by the fan 20 together with the exhaust air. Although it is about to be discharged to the side of the exhaust stack 30, most of the burned dust remains in the hole 36 when passing through the hole 36 of the inverted-pyramidal scrap removal pipe 31 before being discharged from the exhaust port of the exhaust stack 30. The state in which the filter is caught by the wind pressure of the fan and is maintained on the outer surface of the filter unit 35 does not exceed the hole 36. Further, the remaining small amount of burnt dust passes through the hole 36 and enters the inside of the filter portion 35, but since the wind pressure in the filter portion 35 is attenuated by the filter 35, it reaches the exhaust port of the exhaust pipe 30. However, at the position in front of the exhaust port, it falls to the inner bottom portion of the filter portion 35 due to its own weight, adheres to the inner wall, or floats in the space inside the filter portion due to the airflow inside the filter portion. When the fan 20 is stopped due to the end of roasting, the burnt dust attached to the outside of the filter unit 35 and the like falls into the chamber below the exhaust stack 30 (around the fan, the bottom of the roaster chamber) and the filter Burnt dust in the portion 35 falls and accumulates on the inner bottom surface of the filter portion 35. Burnt dust that has fallen into the machine can be removed by cleaning by opening a cleaning window provided at a proper place in the machine, and burnt dust in the dust removing pipe 31 can be cleaned after removing the dust removing pipe 31. The cleaning work is extremely easy.

[0011]

In the coffee bean roaster according to the present invention, a drum rotated by a driving device and a heat source for heating are provided in a casing, and exhaust gas containing burnt residue of coffee beans heated in the drum is provided. In a coffee roaster equipped with an exhaust pipe for discharging the exhaust gas to the outside of the device and a fan for guiding the exhaust gas to the exhaust pipe, a reverse cone-shaped scrap removal pipe is detachably attached to the exhaust port of the exhaust pipe from outside the machine. Since many holes were formed in the wall surface of the residue removing pipe, before the exhaust gas containing the burnt residue from the coffee beans heated and baked in the drum was discharged from the exhaust stack to the outside of the unit. It is possible to remove and recover most of the burned residue by the dust removing pipe so that it is not discharged to the outside of the device, and it is possible to protect the environment. Further, the residue removing tube is less likely to be clogged and can be used without replacement for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic front vertical cross-sectional view of a coffee bean roaster according to the present invention.

2 is a front external view of the coffee bean roaster shown in FIG. 1. FIG.

3A and 3B are a vertical sectional view and a plan view of an exhaust stack.

4 (a), (b) and (c) are time charts showing an example of a roasting step of a vertical cross-sectional view, a plan view, and a development view of the residue removing pipe.

[Explanation of symbols]

1 casing, 2 closed space, 3 ventilation hole, 4 opening, 5 damper, 6 small ventilation hole, 7 drum, 8 small hole, 9 casing side wall, 10 side plate, 11 shaft, 12
Drive device, 13 heat source, 14 temperature sensor, 15 charging lamp, 16 bean receiver, 17 entrance shutter, 1
8 cooling pan, 19 exit shutter, 20 fan, 21
Ventilation passage, 22 Exhaust temperature sensor, 23 Intake pipe, 24
Exhaust pipe, 25 tip opening, 26 heat quantity switching lamp,
27 switch lever, 28 take-out lamp, 29 power switch, a green beans ,.

Claims (1)

[Claims] 1. An exhaust pipe, in which a drum rotated by a drive device and a heat source for heating are provided in a casing, and exhaust gas containing the burnt residue of coffee beans heated in the drum is exhausted to the outside of the device. In a coffee roaster equipped with a fan for guiding the exhaust gas to an exhaust stack, a reverse-pyramidal scrap removal pipe is detachably attached to the exhaust port of the exhaust stack from outside the machine, and the wall surface of the waste removal pipe is attached. A coffee bean roaster characterized by having many holes formed in it.