JPH05123143A - Method for roasting and its apparatus - Google Patents

Abstract

PURPOSE:To prevent beans from oxidizing during heat treatment by heating the beans in a roasting chamber kept in a state of a lower oxygen content than that of ordinary air. CONSTITUTION:A roasting chamber (B) containing beans is kept in a state of a lower oxygen content than that of ordinary air by a method for feeding N2 gas from an N2 gas cylinder 26 into the roasting chamber. In this state, the beans are heat-treated to suppress oxidation of the beans during the heat treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roasting method and apparatus, for example, a roasting method and apparatus for heating peanuts, coffee beans and the like for roasting.

[0002]

BACKGROUND OF THE INVENTION the roasting method and apparatus, conventionally, for example, since the flavor fall when oxidized for oil and fat-rich peanut and coffee beans or the like, after heat treatment in order to avoid this, N ₂ gas Methods such as cooling in a sealed state in CO ₂ gas or CO ₂ gas have been adopted.

[0003]

However, in the above-mentioned conventional means, the oxidation during the heat treatment is not considered at all, and the oxidation of beans progresses faster during the heat treatment. It was not a sufficient measure in terms of prevention.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a roasting method and a roasting apparatus which can effectively prevent oxidation during heat treatment.

[0005]

The roasting method, which is the first characteristic constitution of the present invention, has the point that the roasting process is performed by heating the roasting chamber in a state where the oxygen content is lower than that of normal air. is there.

The roasting method, which is the second characteristic configuration of the present invention, is characterized in that the roasting process is performed by heating while heating the roasting chamber, which is kept sealed or close to it, with an inert gas supplied. ..

The roasting device, which is the third characteristic configuration of the present invention, includes a roasting chamber which is hermetically sealed or maintained in a state close to the sealed state.
The heating means for heating the roasting chamber and the gas supply means for supplying an inert gas to the roasting chamber are provided.

[0008]

According to the first characteristic configuration of the present invention, the roasting chamber containing the beans is maintained in a state in which the oxygen content is lower than that of normal air, and the beans are heat-treated in this atmosphere. Therefore, it is possible to suppress as much as possible the beans from being exposed to oxygen in the air and being oxidized during the heat treatment.

According to the second characteristic construction of the present invention, the roasting chamber containing the beans is maintained in a sealed state or in a state close to the sealed state, and the beans are heat-treated while an inert gas is supplied into the roasting chamber. As a result, the beans are placed in an inert gas environment during the heat treatment, and it is possible to effectively prevent the beans from being oxidized by contact with oxygen in the air.

Further, according to the third characteristic constitution, a roasting device comprising a roasting chamber, a heating means and a gas supply means for realizing the roasting method according to the second characteristic constitution can be obtained.

[0011]

Therefore, according to the first and second characteristic configurations, it becomes possible to effectively prevent the oxidation of the beans during the roasting process. For example, peanuts and coffee beans having a large amount of oil and fat. For roasting, it became possible to roast without sacrificing its flavor.

According to the third characteristic constitution, it is possible to obtain a suitable device for realizing the roasting method described in the second characteristic constitution.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, above the lower casing 1 having a box shape, a lower case 2 of the main body having a substantially rectangular parallelepiped box shape is provided.
Is mounted, and a main body upper case 3 having a semi-cylindrical shape and having a chimney-shaped portion is coupled to the upper part of the main body lower case 2. In addition, a pair of front and rear pillow blocks 4 for pivotal support are provided on the right upper surface of the lower casing 1,
The main body lower case 2 is coupled and supported by a pivot shaft 5 pivotally supported in the front-rear direction by the pillow block 4 through a pair of front and rear flanges 6, whereby the main body lower case 2 is supported. Also, the main body upper case 3 is integrally rotated so as to be rotated rightward about the pivot shaft 5 as a fulcrum to be in a tilted posture.

Inside the lower casing 1, there is installed a blower 7 for supplying combustion air for blowing air taken in from the outside into the lower casing 1. The blown air is located at the position of the top plate of the lower casing 1. After passing through the opening 8 provided in the main body lower case 2, the lower case 2 is supplied to the inside thereof. Below the lower body case 2, a pair of combustion gas burners 1 as heating means connected to a combustion gas supply pipe 9 for supplying combustion gas from the outside.
0 is provided with its combustion port 11 facing upwards,
The gas burner 1 is attached to a side surface of the lower case 2 of the main body.
A peep window 12 for confirming the combustion state of 0 is opened.

In the case inner space extending over the upper part of the lower body case 2 and the lower part of the upper body case 3,
The muffle cylinder 14 made of a stainless steel cylindrical cylinder is
The shaft center is positioned in the horizontal direction, and the shaft is installed in a state of penetrating left and right through the internal space. At the axial center position of the muffle cylinder 14, a pipe-shaped rotary shaft 15
Is supported by a pair of left and right bearings 22 outside the case and is provided so as to rotate around a horizontal axis.
A mesh drum 16 positioned coaxially with the inner surface of the muffle cylinder 14 is fixedly supported by the rotary shaft 15. The rotary shaft 15 is provided with a plurality of nozzles 17 for ejecting gas at predetermined intervals along the axial direction, the right end is closed, and the left end is connected to a swivel joint 18. With the above structure, a roasting chamber B in which the cylindrical space surrounded by the left and right side surfaces of the muffle cylinder 14, the main body lower case 2 and the main body upper case 3 is hermetically sealed or maintained in a state close thereto is formed. become.

On the outer peripheral surface of the left end portion of the rotary shaft 15, a pulley 19 for driving rotation is fixed in an externally fitted state, and on the front side upper surface of the lower casing 1,
A motor 21 for rotating the pulley 19 via a belt 20 is installed, and by driving the motor 21, the rotary shaft 15 and the mesh drum 16 are rotated. At this time, the rotating shaft 15 is rotated by the swivel joint 18, but the portion on the left side of the swivel joint 18 is not rotated.

A heat exchange tube 23 made of metal is provided in the upper part of the upper case 3 of the main body in a pipe state that makes two reciprocating movements in the horizontal direction. The heat exchange tube at the left side surface of the upper case 3 of the main body. A first connection port portion 25 connected to the swivel joint 18 through a resin flexible tube 24 at a front side position of the root portion of 23.
Is provided, and the second connection port portion 2 is provided at the back side position.
7 is provided, and the second connection port portion 27 is connected to an N ₂ gas cylinder 26 as a gas supply means for supplying N ₂ gas as an inert gas. The second connection port 2
7 and the N ₂ gas cylinder 26 are connected to a pipe part on the way,
A pressure gauge 28 and a gas amount adjusting valve 29 are provided. With the above configuration, N ₂ supplied from the N ₂ gas cylinder 26
The gas is preheated while passing through the heat exchange tube 23, and then supplied into the roasting chamber B.

A switching cock 30 for two-way switching is provided in a pipe communicating with the roasting chamber B having a cylindrical space surrounded by the left and right side surfaces of the muffle cylinder 14, the main body lower case 2 and the main body upper case 3. Connected, this switching cock 3
A manual leak amount adjusting valve 31 and a vacuum pump 32 are connected to each switching side of 0. Thus, two directions switching selector valve 30 of the changeover in the state of switching to the leak amount adjusting valve 31 side, the N ₂ while supplying N ₂ gas from the gas cylinder 26 the roasting chamber by adjusting the amount of leakage manually B and adjusting the discharge amount of gas from, or made to be the N ₂ gas cylinder 26 from the N ₂ gas the roasting chamber B to close the after leakage amount adjustment valve 31 is supplied to the pressurized state There is. Further, the N ₂ gas cylinder 26 from the N ₂ gas vacuum pump 32 in a state where the supplying roasting chamber B is switched switching cock 30 after 2 direction-changing filled with N ₂ gas into the vacuum pump 32 side The inside of the roasting chamber B can be depressurized by operating it.

Lower body case 2 constituting the roasting chamber B
Also, a material inlet 33 and a material outlet 34 that are opened and closed in a hinged manner are provided on the right side surface of the main body upper case 3, respectively, and about 1/3 of the drum cross-sectional area is provided on the right side surface of the mesh drum 16. Opening and closing opening 3 that can open and close the opening area of
5 are provided. Thereby, the mesh drum 16
When a material such as beans is charged into the container, the reticulated drum 16 is rotated to position the opening / closing port 35 on the upper side, and the material charging port 33 is opened to charge the material. Also, reticulated drum 1
When the material is discharged from inside 6, the whole body case is rotated to the right with the opening / closing port 35 positioned on the lower side and the material discharging port 34 is opened, and the material is discharged from the material discharging port 34. Discharge to the outside. During the roasting process, the material input port 33, the material discharge port 34, and the opening / closing port 35 are locked so as not to open.

The chimney portion of the main body upper case 3 is formed by narrowing the cross-sectional shape of the internal space, and a combustion air flow rate adjusting valve 36 having an area that substantially covers the narrowed cross section extends in the longitudinal direction. It is arranged in the horizontal axis direction and is provided so as to be rotatable around the horizontal axis core by the manual operation arm 37, whereby the ratio of closing the cross section can be changed to adjust the passing air volume. It has become.

It should be noted that the combustion port 11, the peep window 12, the material charging port 33, and the material discharge port are provided on the inner walls of the main body lower case 2 and the main body upper case 3 above the installation position of the gas burner 10. The part where the outlet 34 is provided,
In addition, except for the uppermost part of the main body upper case 3, a heat insulating material 13 made of a material such as glass wool is arranged.

[Other Embodiments] In the above embodiment, N ₂ gas was used as the inert gas, but CO ₂ gas or the like may be used.

In the above embodiment, the gas burner for burning the combustion gas is used as the heating means 10, but other heating means using petroleum or electricity may be used.

In the above embodiment, the gas supply means 26 is composed of a gas cylinder, but other gas supply means can be used.

In order to make the roasting chamber B have a lower oxygen content than that of normal air, instead of supplying an inert gas, the air is allowed to pass through a catalyst having an oxygen removing action. It can be realized by sending it to the roasting chamber, and this method is particularly preferable when the food is roasted. When roasting a non-food item, an exhaust gas, for example, a method of collecting and supplying exhaust gas of the combustion gas used to heat the roasting chamber may be used.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Side sectional view of a roasting device

FIG. 2 is a front sectional view of a roasting device.

[Explanation of symbols]

 10 heating means 26 gas supply means B roasting chamber

Claims (3)

[Claims] 1. A roasting method in which the roasting chamber (B) is heated in a state where the oxygen content is lower than that of normal air to perform roasting treatment. 2. A roasting method in which a roasting process is carried out by heating in a state in which an inert gas is supplied to a roasting chamber (B) which is hermetically sealed or maintained in a state close to it. 3. A roasting chamber (B) which is hermetically sealed or maintained in a sealed state, a heating means (10) for heating the roasting chamber (B), and an inert gas in the roasting chamber (B). And a gas supply means (26) for supplying the roasting device.