Roasting device

Abstract

To provide a roasting device and control program capable of creating the flavor that becomes the base of a roasted object and creating the flavors corresponding to the roasting level.SOLUTION: In a roasting device which can select one from multiple roasting levels, a control device controls the roasting operation on the basis of a roasting profile consisting of the first stage where the temperature change over time is the same regardless of the roasting level and the second stage where the temperature change over time varies according to the roasting level. During the process of roasting a roasted object, various chemical reactions occur, and flavors such as acidity, umami, and richness are created. By providing the first stage, the basic flavors required for the roasted object can be created and the foundation of the taste can be formed even when any roasting level is selected. In the second stage, by adding the flavors corresponding to the roasting level to the taste that becomes the foundation, the roasted object with excellent flavors can be obtained.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a roasting device for roasting objects to be roasted, such as coffee beans. [Background technology]

[0002] Conventionally, there are devices for roasting items such as green coffee beans, and various types of devices are known, such as gas roasters that use gas to roast, and hot air roasters that roast with air heated by a heater. In all types of devices, roasting is performed by applying a heat vs. time curve called a roast profile to the items to be roasted (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-113958 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when roasting coffee beans, the beans may be roasted at multiple levels, from light roast to dark roast, according to preference. In this case, by creating the flavor required for the coffee beans and the flavor according to the user's preference, it is possible to obtain coffee beans with a good flavor that combines the coffee bean-like flavor with the user's preferred flavor, but there is room for improvement in the roasting control for obtaining such coffee beans with a good flavor.

[0005] The present invention is devised to solve the above-mentioned problems, and aims to provide a roasting device and a control program for the roasting device that can obtain roasted items having the flavor required for the roasted items regardless of the roasting level, and also having a flavor corresponding to the selected roasting level. [Means for solving the problem]

[0006] The present invention relates to A level switch to select one of several roast levels; a control device that controls the roasting operation based on a roasting profile that indicates a change in temperature over time; The roasting profile of the roasting device includes a first stage in which the temperature change over time is the same regardless of the roasting level, and a second stage in which the temperature change over time differs depending on the roasting level.

[0007] The present invention also provides a method for producing a semiconductor device comprising the steps of: A control program for a roasting device having a level switch for selecting one of a plurality of roasting levels, To control the temperature rise during roasting, A first step in which the change in temperature over time is the same regardless of the roasting level; and a second step of varying the change in temperature over time depending on the roasting level. Effect of the Invention

[0008] By configuring as described above, the flavor required for the roasted item is created as the basic flavor in the first stage and first process, and the flavor according to the selected roasting level can be added to the basic flavor in the second stage and second process, so that a roasted item with good flavor can be obtained. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a cross-sectional view of the roasting device of the present embodiment. [Diagram 2] 1 shows an example of a roasting profile according to the present embodiment. [Diagram 3] FIG. 2 is a block diagram of a control device in the roasting device of the present embodiment. [Figure 4] FIG. 2 shows roast profiles for each roast level in this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A preferred embodiment of the present invention will be briefly described below, showing the operation of the present invention.

[0011] The present invention relates to a roasting device that includes a level switch for selecting one of a plurality of roasting levels, and a control device for controlling the roasting operation based on a roasting profile showing the change in temperature over time. The roasting profile is composed of a first stage in which the change in temperature over time is the same regardless of the roasting level, and a second stage in which the change in temperature over time differs depending on the roasting level. In the process of roasting the object to be roasted, various chemical reactions occur, and flavors such as sourness, umami, and richness are added to create the flavor of the object to be roasted. Therefore, by providing a first stage in which the change in temperature over time is the same regardless of the roasting level, the degree of progress of the chemical reactions is uniform, and the flavor required for the object to be roasted can be created as the basic flavor regardless of which roasting level is selected, and the foundation of the flavor can be built. Then, in the second stage, the way in which heat is applied is changed for each roasting level, and the flavor according to the roasting level is added on top of the flavor that is the foundation, so that the object to be roasted can have a good flavor.

[0012] In addition, the first stage has a multi-step temperature change over time. Since the above-mentioned chemical reaction is known to be activated in a specific temperature range, by making the first stage multi-step, multiple taste components can be added and a deep and excellent flavor can be created. Furthermore, by increasing the temperature in a stepwise manner, the targeted flavor can be brought out and a flavor with a clear outline can be created, resulting in a roasted product with a better flavor.

[0013] In addition, the higher the roast level, the higher the temperature is maintained in the second stage. In the first stage, the basic flavor is created, but there is no difference between the roast levels. Therefore, in the second stage, the higher the roast level, the higher the temperature is roasted, adding the bitterness that is characteristic of dark roasted items, and creating a flavor according to the selected roast level.

[0014] The present invention also provides a control program for a roasting device equipped with a level switch for selecting one of a plurality of roasting levels, and executes a first step in which the temperature change over time is the same regardless of the roasting level, and a second step in which the temperature change over time differs depending on the roasting level, as a temperature rise control during roasting. In the process of roasting the object to be roasted, various chemical reactions occur, and flavors such as sourness, umami, and richness are added to create the flavor of the object to be roasted. Therefore, by providing a first step in which the temperature change over time is the same regardless of the roasting level, the degree of progress of the chemical reactions is uniform, and the flavor required for the object to be roasted can be created as the basic flavor regardless of which roasting level is selected, and the foundation of the flavor can be built. Then, by changing the way heat is applied for each roasting level in the second step and adding the flavor according to the roasting level on top of the flavor that is the foundation, the object to be roasted with good flavor can be obtained.

[0015] In addition, the first step has a multi-step temperature change over time. Since the above-mentioned chemical reaction is known to be activated in a specific temperature range, by making the first step multi-step, multiple taste components can be added and a deep and excellent flavor can be created. Furthermore, by increasing the temperature in a stepwise manner, the targeted flavor can be brought out and a flavor with a clear outline can be created, resulting in a roasted product with a better flavor.

[0016] In addition, the higher the roast level, the higher the temperature is maintained in the second step. In the first step, the basic flavor is created, but there is no difference between the roast levels. Therefore, in the second step, the higher the roast level, the higher the temperature is roasted, thereby adding the bitterness that is characteristic of dark roasted items, and creating a flavor according to the selected roast level. EXAMPLES

[0017] An embodiment of the present invention will be described below with reference to the drawings. Note that a coffee bean roaster will be described as an example of a roaster for roasting objects.

[0018] Fig. 1 is a cross-sectional view of the roaster of this embodiment. The roaster 1 of this embodiment is configured with a main body 2 that roasts coffee beans, which are the objects to be roasted, and a chaff container 3 for collecting the thin skins of the coffee beans that are peeled off during the roasting process. The chaff container 3 is detachably provided above the main body 2.

[0019] The main body 2 has a casing 20 that forms the exterior. Inside the casing 20, there are provided a blower 13 consisting of a fan 11 and a motor 12 that generates an air flow, a fan case 110 that rectifies the air flow generated by the blower 13, a heater 14 that is provided downstream of the blower 13 and heats the air, a heater case 140 that houses the heater 14, and a roasting kettle 15 that roasts coffee beans with the air heated by the heater 14.

[0020] The casing 20 has air intakes 21 at the top and bottom to take in air into the main body 2, and when the blower 13 is driven, air flows into the main body 2 from the air intakes 21. The air taken in from the air intake 21 at the top flows downward along the side of the casing 20 toward the bottom of the main body 2. This airflow prevents the heat generated by the heater 14 from being transmitted to the casing 20, and prevents the surface temperature of the casing 20 from rising. The air taken in from the air intake 21 at the bottom merges with the air taken in from the air intake 21 at the top and flows into the fan case 110. The flow of the air that has flowed in is rectified by the fan case 110 and flows toward the heater case 140.

[0021] Heater case 140 is a cylindrical metal part with a top and an opening 141 at the bottom for taking in air rectified by fan case 110, and houses heater 14 inside. Heater case 140 also has a mounting hole 142 at the center of the top surface, to which roasting kettle 15 is attached. Air blown from blower 13 flows into heater case 140 from opening 141, is heated by heater 14 to become hot air, and is then supplied into roasting kettle 15, and coffee beans in roasting kettle 15 are roasted by being heated by the hot air.

[0022] The roasting pot 15 is a cylindrical shape with an open top and a bottom, and is made of a material with high thermal conductivity such as aluminum. When the roasting pot 15 is attached to the mounting hole 142 of the heater case 140, a part of the lower part of the cylinder is housed in the heater case 140. In addition, a flange 150 that protrudes in the outer circumferential direction is formed at a predetermined position on the side of the roasting pot 15, and the roasting pot 15 is arranged at a predetermined position by abutting this flange 150 against the upper surface of the heater case 140. The flange 150 is provided so as to seal the flow path of hot air with the upper surface of the heater case 140, thereby forming a flow path of hot air.

[0023] A plurality of hot air inlets 16 are provided on the side of roasting pot 15 to take in hot air generated by heater 14. Hot air inlets 16 are slit-shaped extending in an oblique direction and are provided in a line at regular intervals in the circumferential direction of the side. Hot air passing through hot air inlets 16 flows into roasting pot 15 and generates a swirling flow. The coffee beans are stirred by this swirling flow, and moisture gradually evaporates while rotating inside roasting pot 15, resulting in roasted coffee beans. In this way, the coffee beans are stirred by the swirling flow, so that the coffee beans can be roasted uniformly in a short time without uneven roasting.

[0024] The hot air after passing through the coffee beans is discharged from an opening at the top of roasting pot 15. Also, the thin skins (chaff) that peel off from the coffee beans during the roasting process are discharged from the opening together with this hot air, and are collected in chaff container 3 provided above main body 2. Chaff container 3 is provided with exhaust port 30, and only the hot air after the chaff has been collected is discharged from this exhaust port 30 to the outside of roasting apparatus 1.

[0025] The roasting device of this embodiment is also provided with two thermistors: heater case thermistor 50 and kettle thermistor 51. Heater case thermistor 50 is attached to the top surface of heater case 140, and detects the temperature of the hot air before it is taken into roasting kettle 15. Kettle thermistor 51 is attached to the side surface of roasting kettle 15, and detects the temperature inside roasting kettle 15.

[0026] In the roasting device 1 configured as described above, roasting is performed by applying a heat vs. time curve called a roasting profile to the object to be roasted. Figure 2 shows an example of a roasting profile in this embodiment. As shown in the figure, the roasting profile is represented by a graph with the vertical axis representing temperature and the horizontal axis representing time, and shows the change in temperature over time.

[0027] The roasting device 1 is provided with a plurality of roasting levels. The user can select a roasting level by operating the level switch 70 (see FIG. 3) provided on the main body 2, and roasting is performed to achieve the selected roasting level. There are three roasting levels: light roast, medium roast, and dark roast. Generally, the range from light roast to dark roast is divided into eight levels: light roast, cinnamon roast, medium roast, high roast, city roast, full city roast, French roast, and Italian roast. Therefore, it is preferable to set the roasting level between 3 and 8 levels. In this embodiment, the roasting level can be selected from three levels, roasting levels 1 to 3, and the level value increases as the roasting level becomes deeper. A different roasting profile is set according to each roasting level.

[0028] The operation of the roaster 1 is controlled by a control device 60, which will be described later. The control device 60 controls the energization of the heater 14 so that the temperature of the roasting pot 15 changes according to the roasting profile.

[0029] 3 is a block diagram of the control device in the roaster of this embodiment. The control device 60 includes a profile storage unit 61, an operation control unit 62, and a heater control unit 63, and controls the roasting operation so that the roasted material is roasted at a roasting level selected by a level switch 70.

[0030] The profile storage unit 61 stores data on the temperature at which the roasted object is heated and the time to maintain that temperature. In this embodiment, the temperature at which the roasted object is heated is the temperature of the roasting pot 15 detected by the pot thermistor 51. A roasting profile is set for each roasting level and stored.

[0031] The operation control unit 62 reads out the roasting profile stored in the profile storage unit 61 based on the roasting level selected by the level switch 70, and controls the operation of each unit in the roasting control. Also, it adjusts the amount of electricity supplied to the heater 14 so that the temperature of the roasting pot 15 changes according to the roasting profile.

[0032] The heater control unit 63 controls the power supply to the heater 14 based on an instruction from the operation control unit 62. The heater 14 is configured to be powered at, for example, either 100% or 50%, and switches the power supply to the heater 14 in response to an instruction from the operation control unit 82.

[0033] Next, the roasting profile of this embodiment will be described in detail.

[0034] Fig. 4 shows the roast profile for each roast level in this embodiment. Regardless of the roast level, the roast profile consists of a first stage for creating the basic flavor of the roasted item, and a second stage for finishing to the selected roast level. In the figure, roast level 1 is shown by a solid line, roast level 2 by a small dashed line, and roast level 3 by a large dashed line.

[0035] In the first stage, the temperature change over time is the same regardless of the roasting level selected by the level switch 70. By heating the coffee beans at a specific temperature, the sugars and amino acids contained in the coffee beans undergo chemical reactions, which can add flavors such as sourness, umami, and richness. The main chemical reactions in coffee beans include "hydrolysis," "Maillard reaction," and "caramelization," and the flavor of the coffee beans is created by these chemical reactions. At this time, regardless of the roasting level, the flavor and aroma required for the coffee beans are created as the basic flavor, building the foundation of the flavor, and flavors according to the roasting level are added to it, resulting in coffee beans with good flavor. Therefore, by providing a first stage in the roasting profile in which the temperature change over time is the same regardless of the roasting level, the degree of progress of the above-mentioned chemical reactions is uniform, and the basic flavor of the roasted product can be created and the foundation of the flavor can be built regardless of which roasting level is selected.

[0036] Furthermore, it is preferable that the first stage is multi-stepped. It is known that the above-mentioned chemical reaction is activated in a specific temperature range. Therefore, by making the first stage multi-stepped, multiple taste components can be added to create a deep and excellent flavor. Furthermore, by maintaining a specific temperature in a stepped manner, it is possible to bring out the targeted taste components and create a flavor with a clear outline. In this embodiment, the temperature is maintained at 150°C and 180°C for a time period, with 150°C being the temperature for the purpose of promoting the Maillard reaction and 180°C being the temperature for the purpose of promoting caramelization. This allows the creation of a basic flavor with richness and umami.

[0037] In the second stage, the temperature change with time varies depending on the roasting level selected by the level switch 70, and the higher the roasting level, the higher the temperature is maintained. In this embodiment, the roasting profile specifies that the temperature is maintained at 190°C for roasting level 1, 210°C for roasting level 2, and 230°C for roasting level 3. In the second stage, the way of adding heat is changed for each roasting level, and the flavor according to the roasting level is added to the flavor that is the foundation built in the first stage, so that the roasted object can be obtained with good flavor. In this embodiment, the higher the roasting level in the second stage, the higher the temperature is roasted, so that the bitterness that is characteristic of the dark roasted object is added and the flavor according to the selected roasting level is added. In addition, the color of the roasted object can be changed to a color close to black, and the color difference according to the roasting level can be created. In addition, the way of adding heat in the second stage may be such that the higher the roasting level, the higher the temperature is maintained, and the higher the temperature reached at the end of the second stage is reached.

[0038] In addition, in order to create differences for each roast level, it is possible to obtain a dark roasted product by roasting at the same temperature regardless of the roast level and lengthening the roasting time for the higher roast level, but as mentioned above, the roasting time can be shortened by using a higher temperature for the higher roast level.

[0039] While a roasting machine has been described as an example embodiment, the embodiment may also be in the form of a control program for causing a control device to execute the first stage as a first process and the second stage as a second process. [Explanation of symbols]

[0040] 60 Control device 70 Level Switch

Claims

1. A level switch to select one of several roast levels; a control device that controls the roasting operation based on a roasting profile that indicates a change in temperature over time; The roasting profile of the roasting device includes a first stage in which the change in temperature over time is the same regardless of the roasting level, and a second stage in which the change in temperature over time differs depending on the roasting level.

2. 2. The roasting device according to claim 1, wherein in the first stage, the temperature changes with time in a multi-step manner.

3. 3. The roasting apparatus according to claim 1 or 2, wherein the second stage maintains a higher temperature as the roasting level increases.

4. A control program for a roasting device having a level switch for selecting one of a plurality of roasting levels, To control the temperature rise during roasting, A first step in which the change in temperature over time is the same regardless of the roasting level; A second step in which a change in temperature over time varies depending on the roasting level.

5. 5. The control program according to claim 4, wherein in the first step, the temperature changes with time in a multi-step manner.

6. 6. The control program according to claim 4 or 5, wherein the second step maintains a higher temperature as the roasting level increases.

Images