JP2018117525A - Roasting device and roasting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roasting device capable of easily maintaining a temperature of a material to be roasted to be constant, and keeping roasting quality of the material to be roasted to be constant without the need of skill.SOLUTION: A roasting device 1 comprises: a rotary drum 3 into which a material to be roasted 2 is put and which moves the material to be roasted 2 from an upstream side to a downstream side while stirring it; a far-infrared heater 4 which is arranged on an upstream side region in the rotary drum 3, which heats the material to be roasted 2 and raises it to a prescribed temperature; and hot wind supply means 5 which is disposed to maintain the prescribed temperature of the material to be roasted 2 to be constant and supplies hot air to a downstream side region in the rotary drum 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a roasting apparatus and roasting method for roasting to-be-roasted articles such as dried leaves such as tea leaves, shiitake mushrooms, herbs, medicinal herbs, burdock, boiled and dried.

  Conventionally, as this type of roasting apparatus, a rotary drum type roasting apparatus is known (Patent Document 1). The roasting device (burning device) disclosed in Patent Document 1 includes a rotating drum that conveys an object to be processed (an object to be roasted) and hot air that is arranged and supplied along the object to be processed that is being conveyed. When the temperature is raised to a predetermined temperature, a far-infrared radiation pipe that radiates far-infrared radiation and hot-air supply means that sends hot air into the far-infrared radiation pipe are configured.

Japanese Patent Laid-Open No. 7-231848

  However, since the roasting device disclosed in Patent Document 1 has a configuration in which a far-infrared radiation pipe is provided from the upstream side to the downstream side of the rotating drum (far-infrared heating method), Although it can be heated in a very short time without contact, it is difficult to maintain the temperature of the to-be-roasted material at a constant temperature. That is, in the roasting device disclosed in Patent Document 1, it is difficult to keep the roasting quality of the material to be roasted constant, and there is a problem that skill is required for roasting such as temperature and time management. .

  The present invention has been made in order to solve the above-mentioned problems in the prior art, and it is easy to maintain the temperature of the to-be-roasted material at a constant temperature, and it is possible to roast the to-be-roasted material without requiring skill. An object of the present invention is to provide a roasting apparatus and a roasting method that make it possible to keep the quality constant.

In order to achieve the object, the configuration of the roasting apparatus according to the present invention is:
(1) A roasting container in which a material to be roasted is charged, and the material to be roasted is moved from the upstream side to the downstream side while stirring;
A far-infrared heater that is provided in an upstream region in the roasting vessel and heats the object to be roasted to raise the temperature to a predetermined temperature;
Temperature control means for controlling the ambient temperature of the to-be-roasted article, provided to maintain the predetermined temperature of the to-be-roasted article for a certain period of time;
It is provided with.

  According to the configuration of (1) of the roasting apparatus of the present invention, the temperature of the to-be-roasted object heated to a predetermined temperature by the far-infrared heater in a very short time is set by the temperature control means. It is possible to control the ambient atmosphere temperature of and maintain it for a certain period of time. Therefore, according to the configuration of the above roasting apparatus (1) of the present invention, it is easy to maintain the temperature of the roasted product at a constant temperature, and the roasting quality of the roasted product is not required for skill. It is possible to provide a roasting apparatus that makes it possible to keep the temperature constant.

  In the configuration (1) of the roasting apparatus of the present invention, the following configurations (2) to (8) are preferable.

  (2) The roasting container is a rotating drum.

  (3) In the configuration of (2) above, the inner peripheral surface of the rotating drum is formed in a corrugated plate shape having alternately mountain-shaped portions and groove-shaped portions extending in the axial direction of the rotating drum.

  According to the preferable configuration of (3) above, it becomes possible to invert (stir) the to-be-roasted material efficiently (in small increments). As a result, it becomes possible to efficiently perform irradiation of far-infrared rays or maintain the temperature of the object to be roasted with hot air described later. In addition, it is possible to reduce the unevenness of the influence of far infrared rays and the ambient temperature of the object to be roasted on the object to be roasted to prevent the occurrence of roasting unevenness.

  (4) In the configuration of (2), the rotating drum is provided so as to be able to tilt downward from the upstream side toward the downstream side.

  According to the preferable configuration of the above (4), it is possible to move the roasting object well from the upstream side to the downstream side while rotating the rotary drum.

  (5) The temperature control means is hot air supply means for supplying hot air to a downstream region in the roasting vessel.

  According to the preferred configuration of (5) above, the ambient temperature of the roasted product can be controlled with a simpler configuration, and the predetermined temperature of the roasted product can be maintained for a certain period of time.

(6) In the configuration of (5), the hot air supply means is connected to the hot air generator and the hot air generator, and hot air is inserted into the roasting container from the downstream opening of the roasting container. Piping, and
A plurality of hot air outlets are formed on a peripheral surface of a portion of the hot air pipe located in a downstream region within the roasting vessel.

(7) In the configuration of (6), a cover is provided to cover a lower periphery on both sides of a portion of the hot air pipe where the plurality of hot air outlets are formed, and
Shielding plates are provided at both ends of the hot air pipe before and after the portion where the hot air outlets are formed.

  According to the preferable configuration of (7) above, it is possible to efficiently supply hot air to the periphery of the object to be roasted to stabilize the ambient temperature of the object to be roasted. As a result, the ambient atmosphere temperature of the roasted product can be increased with a small amount of air (or low wind speed), and therefore the temperature of the roasted product can be increased efficiently. Moreover, since it becomes possible to raise the temperature of a to-be-roasted object even if the air volume (or wind speed) around the to-be-roasted object is reduced (or lowered) in this way, quality deterioration due to overdrying is prevented, The roasting quality of the material to be roasted can be improved.

(8) In the configuration of (6) above, the hot air outlets are provided as a plurality of sets, provided at a predetermined interval,
Between each set of the hot air outlets in the hot air pipe, a baffle plate that guides hot air from each of the hot air outlets is provided.

  According to the preferred configuration of (8) above, the amount of hot air blown from each set of hot air blowout ports can be made uniform, so that hot air can be uniformly applied to the to-be-roasted item.

The composition of the roasting method according to the present invention is as follows:
(9) A roasting method in which roasting is performed while moving the roasting material from the upstream side to the downstream side while stirring,
In the upstream region, heating the roasting object with a far infrared heater to raise the temperature to a predetermined temperature;
Controlling the ambient temperature of the to-be-roasted article to maintain the predetermined temperature of the to-be-roasted article for a certain period of time;
It is characterized by including.

  According to the above configuration (9) of the roasting method of the present invention, the temperature of the to-be-roasted object heated to a predetermined temperature by the far-infrared heater in a very short time is used as the ambient temperature of the to-be-roasted object. Can be maintained for a certain period of time. Therefore, according to the configuration of the above roasting method (9) of the present invention, it is easy to maintain the temperature of the roasted product at a constant temperature, and the roasting quality of the roasted product is not required for skill. Can be kept constant.

  In the configuration (9) of the roasting method of the present invention, the following configurations (10) and (11) are preferable.

  (10) The ambient temperature of the to-be-roasted product is controlled by supplying hot air.

  According to the preferable configuration of (10) above, it is possible to maintain the predetermined temperature of the to-be-roasted material for a certain time by controlling the ambient atmosphere temperature of the to-be-roasted material with a simpler configuration.

  (11) The roasted product is a tea leaf.

  According to the preferred configuration of (11) above, it is possible to obtain roasted quality tea leaves that are particularly excellent in light blue and various colors.

  According to the present invention, it is easy to maintain the temperature of the to-be-roasted material at a constant temperature, and the roasting device that makes it possible to keep the roasting quality of the to-be-roasted material constant without requiring skill, and A roasting method can be provided.

It is a sectional side view which shows schematic structure of the roasting apparatus in one embodiment of this invention. It is the II-II sectional view taken on the line of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. It is an enlarged view which shows the structure of the front-end | tip part (part inserted in a rotating drum) of the hot air piping which is a structural member of the roasting apparatus in one embodiment of this invention. 4A is a cross-sectional view taken along line V1-V1 in FIG. 4, FIG. 4B is a cross-sectional view taken along line V2-V2 in FIG. 4, and FIG. 5C is a cross-sectional view taken along line V3-V3 in FIG. It is a sectional side view which shows the state which inclined the roasting apparatus in one embodiment of this invention back (discharge side).

  Hereinafter, the present invention will be described more specifically with reference to preferred embodiments. However, the following embodiment is merely an example embodying the present invention, and the present invention is not limited to this.

(Roasting device)
First, the configuration of a roasting apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  1 is a side sectional view showing a schematic configuration of a roasting apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is taken along line III-III in FIG. FIG. 4 is a sectional view, FIG. 4 is an enlarged view showing a configuration of a tip portion (a portion inserted into a rotating drum) of a hot air pipe which is a component of the roasting device, and FIG. 5A is a V1-V1 line in FIG. FIG. 5B is a cross-sectional view taken along the line V2-V2 in FIG. 4, FIG. 5C is a cross-sectional view taken along the line V3-V3 in FIG. 4, and FIG. It is a sectional side view which shows the state inclined downward to the back (discharge side).

As shown in FIGS. 1 to 3, the roasting apparatus 1 according to the present embodiment has a roasting apparatus 2 in which a roasting object 2 is input and the roasting object 2 is moved from the upstream side to the downstream side while stirring. A roasting container 3, a far infrared heater 4 provided in an upstream region within the roasting container 3, for heating the roasting object 2 to raise the temperature continuously and uniformly to a predetermined temperature, and the roasting object 2 Temperature control means 5 for controlling the ambient temperature of the to-be-roasted article 2 provided to maintain the predetermined temperature for a certain period of time.
The roasting apparatus 1 of the present embodiment is used for roasting to-be-roasted articles such as dried leaves such as tea leaves, shiitake mushrooms, herbs, medicinal herbs, burdock, and boiled and dried.

  According to the configuration of the roasting apparatus 1 of the present embodiment, the temperature of the to-be-roasted object 2 heated to the predetermined temperature by the far-infrared heater 4 in a very short time is used for the roasting by the temperature control means 5. It becomes possible to control the ambient temperature of the object 2 and maintain it for a certain time. Therefore, according to the configuration of the roasting apparatus 1 of the present embodiment, it is easy to maintain the temperature of the to-be-roasted item 2 at a constant temperature, and the roasting quality of the to-be-roasted item 2 is not required for skill. It is possible to provide a roasting apparatus that makes it possible to keep the temperature constant.

In the roasting apparatus 1 of the present embodiment, the far-infrared irradiation distance and the irradiation angle can be adjusted from the outside of the roasting container 3. And thereby, it becomes possible to irradiate far infrared rays with respect to the position of the to-be-roasted object 2 in the roasting container 3 without waste.
The output of the far infrared heater 4 is preferably 250 to 750 W.

In the present embodiment, as the roasting container 3, a rotating drum made of a cylindrical material made of steel or stainless steel is used. In the following description, the reference numeral “3” is also given to the rotating drum.
The rotating drum 3 has a cylinder inner diameter of 300 mm and a trunk length of 900 mm, and the outer surface of the cylinder is covered with a heat insulating material in order to increase thermal efficiency. The rotating drum 3 is rotatably supported at the lower four corners using support rollers 7a to 7d (7a not shown) rotatably supported on the upper surface of the gantry 6. A driven gear 3a is formed on the outer periphery of the central portion of the rotating drum 3, and the last gear 8a of the geared motor 8 is meshed with the driven gear 3a. By driving the geared motor 8, the rotary drum 3 can be rotated at a low speed. At this time, the rotating drum 3 rotates (see the arrow A in FIGS. 2 and 3), and the support rollers 7a to 7d also rotate following the rotation (see the arrows B and C in FIGS. 2 and 3).
The rotation speed of the rotary drum 3 is preferably in the range of 0.5 to 5 rpm.

As shown in FIGS. 2 and 3, a stainless corrugated plate-like member 9 having alternating chevron portions 9 a and groove portions 9 b extending in the axial direction of the rotary drum 3 is formed on the inner peripheral surface of the rotary drum 3. Removably attached. By making the corrugated plate member 9 removable, it becomes possible to replace the corrugated plate member with a different shape depending on the type of roasting object 2 and roasting conditions. Here, the cross section of the chevron 9a and the groove 9b of the corrugated member 9 is formed in an obtuse triangular shape.
And by making the inner peripheral surface of the rotating drum 3 into a corrugated plate structure in this way, it becomes possible to invert (stir) the to-be-roasted product 2 efficiently (in small increments). As a result, it is possible to efficiently perform irradiation of far infrared rays or maintain the temperature of the to-be-roasted object 2 with hot air described later. In addition, it is possible to reduce the unevenness of the influence of the far infrared rays and the ambient atmosphere temperature of the to-be-roasted object 2 on the to-be-roasted object 2 and prevent the occurrence of roasting unevenness.

As shown in FIGS. 1 to 3 and 6, the rotary drum 3 is provided so as to be able to tilt downward from the upstream side toward the downstream side.
That is, telescopic legs 10a to 10d (not shown for 10b) are attached to the bottom surface of the gantry 6 at the four corners, and the telescopic legs 10a and 10b on the front side (upstream side) are stretched on the rear side (downstream side). By extending more than the legs 10c and 10d (see arrow D in FIG. 6), the rotating drum 3 can be inclined downward from the upstream side toward the downstream side (state in FIG. 6). The inclination angle θ of the rotating drum 3).
Thus, by providing the rotary drum 3 so as to be able to tilt downward from the upstream side to the downstream side, the to-be-roasted article 2 can be successfully moved from the upstream side to the downstream side while rotating the rotary drum 3. Is possible.

If the tilt angle of the rotating drum 3 is too small, the dispersion time of the to-be-roasted item 2 in the rotating drum 3 becomes large. If the tilt angle of the rotating drum 3 is too large, the dispersion becomes small. Will be shorter.
The residence time (drum passage time) of the to-be-roasted article 2 in the rotary drum 3 is preferably in the range of 10 to 15 minutes. In order to achieve this residence time, the inclination angle of the rotary drum 3 is , Preferably in the range of 0.5 to 2.0 degrees.

In the present embodiment, hot air supply means for supplying hot air to the downstream region in the rotary drum 3 is used as the temperature control means 5. That is, the roasting apparatus 1 of the present embodiment heats the roasted object 2 by the far-infrared heater 4 in the rotating drum 3 to continuously and uniformly raise the temperature to a predetermined temperature, and then continuously. The ambient temperature of the article to be roasted 2 can be controlled to maintain the predetermined temperature of the article to be roasted 2 for a certain period of time. In the following, the hot air supply means is also described with reference numeral “5”.
More specifically, the hot air supply means 5 includes a hot air generator 5a, a hot air pipe 5b connected to the hot air generator 5a and inserted into the rotary drum 3 from the downstream opening of the rotary drum 3. And a plurality of hot air outlets 5c are formed on the peripheral surface of the portion of the hot air pipe 5b located in the downstream region in the rotary drum 3. The tip of the hot air pipe 5b is closed.
Thus, by using the hot air supply means for supplying the hot air to the downstream region in the rotary drum 3 as the temperature control means 5, the ambient atmosphere temperature of the to-be-roasted item 2 can be controlled with a simpler configuration. The predetermined temperature of the to-be-roasted item 2 can be maintained for a certain period of time.

As shown in FIGS. 1, 3 and 6, in the roasting apparatus 1 of the present embodiment, the cross section covering the lower periphery on both sides of the portion where the hot air outlets 5c are formed in the hot air pipe 5b. The C-shaped cover 11 is provided, and umbrella-shaped shielding plates 12a and 12b are provided at both ends of the hot air pipe 5b before and after the portion where the plurality of hot air outlets 5c are formed.
In this way, by covering the lower side of both sides of the portion where the plurality of hot air outlets 5c are formed in the hot air pipe 5b and both front and rear ends with the cover 11 and the shielding plates 12a and 12b, It becomes possible to supply efficiently to the periphery of the article to be roasted 2 and to stabilize the ambient temperature of the object to be roasted 2. As a result, the ambient atmosphere temperature of the to-be-roasted item 2 can be raised with a small amount of air (or a low wind speed), so that the temperature of the to-be-roasted item 2 can be increased efficiently. Further, since the temperature of the to-be-roasted object 2 can be increased even if the air volume (or wind speed) around the to-be-roasted object 2 is reduced (or lowered) in this way, quality deterioration due to overdrying can be prevented. This can prevent and improve the roasting quality of the article to be roasted 2.
It is preferable that the temperature of the hot air generator 5a (ambient atmosphere temperature of the to-be-roasted object 2) is in the range of 100 to 150 ° C.
As shown in FIGS. 1 and 6, a temperature sensor 14 is disposed in the rotary drum 3 near the hot air outlet 5c of the hot air pipe 5b, and the temperature measured by the temperature sensor 14 is fed back. Thus, hot air temperature control (power control of the hot air generator 5a) can be performed.

As shown in FIGS. 1, 4, and 6, the hot air outlet 5 c is provided in a plurality of sets (four sets in the present embodiment) at predetermined intervals. As shown in FIGS. 4 and 5, hot air blowing from each pair of hot air outlets 5c is guided between the hot air outlets 5c in the hot air pipe 5b in order in the flow direction of hot air. Baffle plates 13a to 13c are provided. Here, the height of the baffle plates 13a to 13c increases in this order. More specifically, the height of the baffle plate 13a is a quarter of the inner diameter of the hot air piping 5b, the height of the baffle plate 13b is a half of the inner diameter of the hot air piping 5b, and the height of the baffle plate 13c is The inner diameter of the hot air pipe 5b is set to three quarters.
According to this configuration, the amount of hot air blown from each set of hot air outlets 5c can be made uniform, so that hot air can be uniformly applied to the to-be-roasted item 2.

1 and 6, reference numeral 15 indicates an insertion port, and a vibration feeder type hopper (not shown) is connected to the insertion port 15. As a result, the to-be-roasted product 2 is supplied to the hopper, and an appropriate amount of the to-be-roasted product 2 can be put into the rotary drum 3 through the vibration feeder. Here, the vibration feeder is formed in a square shape having a large capacity.
The roasted object 2 to be roasted is discharged from the rear end surface of the rotary drum 3.

The roasting device 1 of the present embodiment is provided with a touch panel type control device (not shown), and the output of the far-infrared heater 4 according to the type of roasting object 2 and roasting conditions, The temperature of the hot air generator 5a, the rotational speed of the geared motor 8 (rotational speed of the rotary drum 3), etc. can be set as appropriate.
Then, by appropriately adjusting the rotation speed and the inclination angle θ of the rotating drum 3, the residence time of the to-be-roasted product 2 in the rotating drum 3 (cylinder) according to the type and roasting conditions of the to-be-roasted product 2. (Passing time) can be controlled.
Further, by touching the power switch on the control device, the far-infrared heater 4 and the hot air generator 5a are driven, the rotating drum 3 starts to rotate, and the vibration feeder of the vibration feeder type hopper starts to vibrate. Has been. In addition, what is necessary is just to touch the end button on a control apparatus, when complete | finishing a roasting operation | work.

(Roasting method)
Next, a roasting method using the roasting apparatus according to one embodiment of the present invention will be described.

  First, by extending the front (upstream) telescopic legs 10a, 10b more than the rear (downstream) telescopic legs 10c, 10d (see arrow D in FIG. 6), the inclination angle θ of the rotary drum 3 is set. It sets suitably in the range of 0.5-2.0 degree | times. Next, the far-infrared irradiation distance and the irradiation angle are adjusted from the outside of the rotating drum 3. Next, the touch panel type control device is operated, the output of the far-infrared heater 4 is in the range of 250 to 750 W, the temperature of the hot air generator 5 a is in the range of 100 to 150 ° C., and the rotation speed of the rotary drum 3 is 0. Each is set appropriately within a range of 5 to 5 rpm. At this time, the residence time (cylinder passage time) of the to-be-roasted item 2 in the rotating drum 3 is 10 to 15 minutes.

  Subsequently, the to-be-roasted object 2 is supplied to a hopper, and the power switch on a control apparatus is touched. Thereby, the far-infrared heater 4 and the hot air generator 5a are driven, the rotating drum 3 starts to rotate, and the vibration feeder of the vibration feeder type hopper starts to vibrate. Then, an appropriate amount of the to-be-roasted material 2 is put into the rotary drum 3 through the vibration feeder, and roasting of the to-be-roasted material 2 is started.

  First, the to-be-roasted object 2 is heated by the far-infrared heater 4 and heated to a predetermined temperature while moving toward the downstream region in the upstream region in the rotating drum 3. The to-be-roasted article 2 is efficiently reversed (stirred) by the corrugated plate member 9 while moving in the upstream region in the rotary drum 3. As a result, it is possible to efficiently irradiate far infrared rays. Moreover, it becomes possible to reduce the unevenness of the influence of far infrared rays on the roasted object 2 and prevent the occurrence of roasting unevenness.

  Next, the ambient temperature of the to-be-roasted object 2 is controlled by hot air from the hot-air outlet 5c of the hot-air pipe 5b in the downstream region in the rotary drum 3, whereby the predetermined temperature of the to-be-roasted object 2 is controlled. Is maintained for a certain period of time. The to-be-roasted object 2 is efficiently reversed (stirred) by the corrugated plate member 9 while moving in the downstream region in the rotary drum 3. As a result, it is possible to efficiently maintain the temperature of the to-be-roasted item 2 with hot air. In addition, it is possible to reduce the unevenness of the influence of the ambient temperature of the article to be roasted 2 on the object to be roasted 2 and to prevent the occurrence of roasting unevenness.

  The to-be-roasted object 2 roasted as described above is discharged from the rear end face of the rotary drum 3.

  According to the configuration of the roasting method of the present embodiment described above, the temperature of the to-be-roasted object 2 heated to the predetermined temperature by the far-infrared heater 4 in a very short time is used as the temperature of the to-be-roasted object 2. The ambient temperature can be controlled and maintained for a certain period of time. Therefore, according to the configuration of the roasting method of the present embodiment, it is easy to maintain the temperature of the to-be-roasted item 2 at a constant temperature, and the roasting quality of the to-be-roasted item 2 can be increased without requiring skill. It can be kept constant.

As a result of an experimental study by the present inventor, when the material to be roasted 2 is tea leaves, it has been found that the quality greatly differs because the tea leaf temperature during roasting differs by 5 ° C.
However, with the roasting apparatus and roasting method of the present embodiment, the tea leaf temperature can be set finely, so that the roasting process with the target quality can be performed with an easy operation. In particular, the quality setting from weak roasting to strong roasting is possible by finely setting the tea leaf temperature within a range of 115 to 130 ° C. The roasting quality processed by the roasting apparatus and roasting method of the present embodiment was particularly excellent in light blue and color.

  In the above embodiment, the case where the rotating drum 3 is used as the roasting container has been described as an example, but the present invention is not necessarily limited to such a configuration. The roasting container only needs to have a configuration in which a material to be roasted is charged and the material to be roasted is moved from the upstream side to the downstream side while stirring. For example, a stirring and conveying screw that rotates around an axis is provided. It may be a stationary drum provided.

  In the above embodiment, the case where the hot air supply means for supplying hot air to the downstream region in the roasting container 3 is used as the temperature control means 5 has been described as an example, but the present invention is not necessarily limited to this. It is not limited to a simple configuration. The temperature control means only needs to be configured to control the ambient atmosphere temperature of the to-be-roasted object in order to maintain the predetermined temperature of the to-be-roasted object for a certain period of time.

  Moreover, in the said embodiment, the corrugated plate-like member 9 which has the mountain-shaped part 9a and the groove-shaped part 9b which are extended to the axial direction of the said rotating drum 3 alternately is attached to the inner peripheral surface of the rotating drum 3 so that attachment or detachment is possible. However, the present invention is not necessarily limited to such a configuration. For example, the corrugated member 9 may be fixed to the inner peripheral surface of the rotating drum. Moreover, the inner peripheral surface itself of the rotating drum may be formed in a corrugated plate shape.

1 Roasting equipment 2 Object to be roasted 3 Roasting container (rotary drum)
3a driven gear 4 far infrared heater 5 temperature control means (hot air supply means)
5a Hot-air generator 5b Hot-air piping 5c Hot-air outlet 6 Base 7a-7d Support roller 8 Geared motor 8a Final gear 9 Corrugated member 9a Mountain-shaped portion 9b Groove-shaped portion 10a-10d Telescopic leg 11 Cover 12a, 12b Shield plate 13a- 13c baffle plate 14 temperature sensor 15 slot

Claims (11)

A roasting container in which a material to be roasted is charged, and the material to be roasted is moved from the upstream side to the downstream side while stirring,
A far-infrared heater that is provided in an upstream region in the roasting vessel and heats the object to be roasted to raise the temperature to a predetermined temperature;
Temperature control means for controlling the ambient temperature of the to-be-roasted article, provided to maintain the predetermined temperature of the to-be-roasted article for a certain period of time;
Roasting equipment with.   The roasting apparatus according to claim 1, wherein the roasting container is a rotating drum.   The roasting apparatus according to claim 2, wherein an inner peripheral surface of the rotating drum is formed in a corrugated plate shape having alternately mountain-shaped portions and groove-shaped portions extending in the axial direction of the rotating drum.   The roasting device according to claim 2 or 3, wherein the rotating drum is provided so as to be inclined downward from the upstream side toward the downstream side.   The roasting apparatus according to any one of claims 1 to 4, wherein the temperature control means is hot air supply means for supplying hot air to a downstream region in the roasting container. The hot air supply means includes a hot air generator, and a hot air pipe connected to the hot air generator and inserted into the roasting container from the downstream opening of the roasting container,
The roasting apparatus according to claim 5, wherein a plurality of hot air outlets are formed on a peripheral surface of a portion of the hot air pipe located in a downstream region in the roasting container. A cover is provided to cover the lower periphery on both sides of the portion of the hot air piping where the plurality of hot air outlets are formed, and
The roasting apparatus according to claim 6, wherein shielding plates are provided at both ends of the hot air pipe before and after a portion where the plurality of hot air outlets are formed. A plurality of the hot air outlets are provided as a plurality of sets, provided at a predetermined interval,
The roasting apparatus according to claim 6 or 7, wherein a baffle plate that guides blowing of hot air from each set of hot air blowing ports is provided between each set of hot air blowing ports in the hot air piping. . A roasting method for performing roasting while moving an object to be roasted from an upstream side to a downstream side while stirring,
In the upstream region, heating the roasting object with a far infrared heater to raise the temperature to a predetermined temperature;
Controlling the ambient temperature of the to-be-roasted article to maintain the predetermined temperature of the to-be-roasted article for a certain period of time;
A roasting method comprising:   The roasting method according to claim 9, wherein an ambient temperature of the roasted object is controlled by supplying hot air.   The roasting method according to claim 9 or 10, wherein the object to be roasted is tea leaves.