JP2016131701A - Roaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roaster capable of automatically adjusting output of a heat source and keeping a roasting surface of a cooking utensil at an optimum temperature.SOLUTION: A roaster includes an outer box 3, an inner box 4 included in the outer box 3, a cooking utensil 7 placed in the inner box 4, a flame burner 9 for heating the cooking utensil 7, temperature detection means 30 for detecting the temperature of the outer box 3, and control means 20 for controlling the fire power of the flame burner 9. The control means 20 calculates a temperature variation rate α of the temperature of the outer box 3, and adjusts a fire power level F of the flame burner 9 based on the calculated temperature variation rate α.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a roaster.

  2. Description of the Related Art Conventionally, a roaster is known in which a cooking tool such as a net is heated by a flame burner such as a gas burner, and ingredients on the cooking tool are baked and cooked. As such a roaster, for example, the roaster described in Patent Document 1 is known. Patent Document 2 discloses a roaster configured to automatically control the flame burner's heating power in a roaster that heats a cooking tool such as a net with a flame burner such as a gas burner and burns and cooks ingredients on the cooking tool. Has been.

  In Patent Document 1, an outer box 8 having an upper opening is disposed below the table 7, and an upper end portion of the outer box 8 is disposed in the opening 9 of the table 7, and an upper opening is formed inside the outer box 8. The inner box 10 is disposed, a suction space 11 is formed between the outer box 8 and the inner box 10, a heating unit 12 is disposed in the inner box 10, and above the heating unit 12, A roaster in which placing cooking means 13 such as a grill or rooster is arranged is disclosed (paragraph [0014] in FIG. 4 and FIG. 4 and the like).

  Patent Document 2 discloses a cooking device that controls to automatically switch to a normal output after a set time has elapsed when the output of the gas burner 24 is higher than normal in the cooking device 1 using the gas burner 24. (Claim 1 of Patent Document 2, paragraph [0020] and FIG. 5).

JP 2010-119833 A JP 2011-030728 A

  Usually, in a roaster as shown in Patent Document 1, a user puts food on a cooking utensil and performs cooking, eats while watching the degree of baking of the food on the cooking utensil, and inputs and cooks the food. , Repeat eating and drinking. In this case, the temperature of the cooking utensil increases as the ingredients on the cooking utensil are baked, while the temperature of the cooking utensil decreases by replenishing new ingredients. Therefore, in order to maintain the baking surface temperature of the cooking utensil at the optimum temperature, the output of the heating source of the roaster is controlled to decrease as the temperature of the cooking utensil increases, while it increases as the temperature of the cooking utensil decreases. It is desirable that

  However, until now, the output adjustment of the heating source of the roaster has been performed manually by the eater while watching the degree of baking of the ingredients on the cooking utensil, but such an operation is troublesome for the eater. Is. Furthermore, although the ingredients on the cooking utensils are burned, the output of the heating source may be maintained at a high output. As a result, the ingredients are burnt and the fuel of the heating source (for example, gas) There was a problem that wasted wastefully.

  In addition, when a flame burner is used as a heating source for the roaster, the flame burner may ignite the oil from the ingredients on the cooking utensil during cooking, causing a fire pillar to stand on the cooking utensil, and the temperature of the cooking utensil may rise rapidly. is there. However, as described above, since the output adjustment of the heating source of the roaster is performed by the eater, even if such a phenomenon occurs, the thermal power of the flame burner is often not reduced immediately, the ingredients on the cooking utensils There was a problem of burning. In addition, although the phenomenon that a fire pillar stands in a cooking utensil frequently occurs in ingredients with a lot of fat such as ingredients such as pork ribs and hormones, it hardly occurs in ingredients with a small amount of fat such as ingredients such as fillet and vegetables.

  In order to solve the above problems, there is a need for a roaster that can automatically adjust the heating power of the flame burner and maintain the burning surface temperature of the cooking utensil at the optimum temperature. However, the cooking device disclosed in Patent Document 2 simply controls so that when the output of the gas burner 24 is higher than normal, it automatically switches to normal output after the set time has elapsed. It does not adjust the output of the gas burner 24 as a heating source in accordance with the change, and does not provide any solution to the above problem.

  An object of this invention is to provide the roaster which can adjust the output of a heating source automatically, and can maintain the baking surface temperature of a cooking utensil at the optimal temperature.

  The roaster of the present invention comprises an outer box, an inner box contained in the outer box, a cooking tool placed on the inner box, a flame burner for heating the cooking tool, and a temperature detection means for detecting the temperature of the outer box. And a control means for controlling the thermal power of the flame burner, the control means calculates the temperature change rate of the temperature of the outer box, and adjusts the fire power level of the flame burner based on the calculated temperature change rate It is characterized by.

  In the present invention, the inventor has found that there is no time lag between the change in the baking surface temperature of the cooking utensil and the temperature change rate of the temperature of the outer box, and the same tendency. Therefore, as shown in the above feature, the temperature detecting means is not provided in the cooking utensil that needs to be removed when the roaster is cleaned, but in the outer box that does not need to be removed even when the roaster is cleaned. By controlling the heating power level of the flame burner according to the temperature change rate of the temperature of the outer box, it becomes possible to control the heating power without causing a time lag even if the burning surface temperature of the cooking utensil changes abruptly.

  The roaster of the present invention comprises a plurality of temperature detection means, and the control means calculates a moving average temperature for a certain time of the temperatures detected by the plurality of temperature detection means, and calculates an arithmetic average temperature from these moving average temperatures. It is preferable to calculate and use the arithmetic average temperature as the temperature of the outer box, and calculate the temperature change rate from the arithmetic average temperature.

  Due to the above characteristics, even when the temperature change of the outer box is large, the temperature detection of the outer box with large fluctuations is stabilized, and even if the temperature distribution of the outer box is large and unbalanced, the average temperature change of the outer box is accurate The rate can be calculated.

  In the roaster of the present invention, when the calculated temperature change rate satisfies a predetermined condition stored in the control unit, the control unit calculates the calculated temperature change rate and the predetermined temperature change rate stored in the control unit. It is preferable to set the temperature change rate thermal power level determined based on the comparison with the range as the thermal power level of the flame burner.

  Due to the above characteristics, it is possible to adjust the heating power of the flame burner from the tendency of the temperature change rate.

  In the roaster of the present invention, when the calculated temperature change rate satisfies a predetermined condition stored in the control unit, the control unit calculates the temperature between the outer box and a predetermined reference temperature range stored in the control unit. It is preferable to set the reference temperature thermal power level determined based on the comparison as the thermal power level of the flame burner.

  According to the above characteristics, the heating power of the flame burner can be adjusted from the tendency of temperature change of the outer box.

  In the roaster of the present invention, the control means has a predetermined difference in which the difference between the calculated temperature change rate and the temperature change rate before a predetermined time is 0 or more, and the calculated temperature change rate is stored in the control means. The temperature change rate range is smaller than the upper limit value, or the difference between the calculated temperature change rate and the temperature change rate before the predetermined time is smaller than 0, and the calculated temperature change rate is the predetermined temperature change. When larger than the lower limit value of the rate range, the reference temperature thermal power level determined based on the comparison between the temperature of the outer box and the predetermined reference temperature range stored in the control means is set as the thermal power level of the flame burner, The calculated temperature change rate when the difference between the calculated temperature change rate and the temperature change rate before the predetermined time is not less than 0 and the calculated temperature change rate is not less than the upper limit value of the predetermined temperature change rate range. And a predetermined stored in the control means The temperature change rate thermal power level determined based on the comparison with the temperature change rate range is set as the flame power level of the flame burner, and the difference between the calculated temperature change rate and the temperature change rate before a predetermined time is smaller than 0 When the calculated temperature change rate is equal to or lower than the lower limit value of the predetermined temperature change rate range stored in the control means, the reference temperature thermal power level is compared with the temperature change rate thermal power level, whichever is greater The difference between the thermal power level and the thermal power level of the flame burner a predetermined time before is calculated, and if the difference is less than the predetermined value stored in the control means, the reference temperature thermal power level and the temperature change Set the fire power level of the flame burner, whichever is greater than the rate fire power level, and when the difference is greater than the specified value, increase the fire power level of the flame burner for a specified time by a specified increment It is preferable to set the heating power level was as thermal power level of the flame burner.

  Due to the above characteristics, automatic cooking can always be performed automatically with the optimum heating power regardless of the amount of fat and oil in the food and the amount of the food.

  In the roaster of the present invention, the temperature change rate thermal power level is decreased when the calculated temperature change rate is higher than the upper limit value of the predetermined temperature change rate range stored in the control means. It is preferable to determine to increase the thermal power level when it is lower than the lower limit value of the rate range.

  With the above features, the surface temperature of the cooking utensil can be monitored, and the thermal power level of the flame burner can be controlled in order to avoid a rapid temperature rise in advance. As a result, it is possible to prevent the flame from becoming large during the flame rising process, which is useful for disaster prevention of the roaster. In particular, it is also suitable for cooking of foods rich in fats and oils.

  In the roaster of the present invention, the reference temperature thermal power level is lowered when the temperature of the outer box is higher than the upper limit value of the predetermined reference temperature range stored in the control means, and the lower limit value of the predetermined reference temperature range. When it is lower than that, it is preferable to determine to increase the thermal power level.

  According to the above feature, it is possible to set the heating power level of the flame burner by imagining the burning surface temperature of the cooking utensil and to monitor the burning surface temperature of the cooking utensil, so that the heating power of the flame burner can be automatically adjusted.

  In the roaster of the present invention, the control means is a value within a predetermined temperature change rate range in which the calculated temperature change rate is stored in the control means after the first predetermined time elapses and before the second predetermined time elapses. Then, the temperature of the outer box at that time is stored as the reference temperature, and the calculated temperature change rate is within a predetermined temperature change rate range stored in the control means even after the second predetermined time has elapsed. If not, the temperature of the outer box when the second predetermined time elapses is stored as a reference temperature, the stored reference temperature is compared with the predetermined temperature stored in the control means, and the stored reference temperature is stored. If the stored reference temperature is lower than the predetermined temperature, the predetermined temperature is stored as the reference temperature and the reference temperature range is determined. It is preferable to determine.

  Due to the above characteristics, especially in winter and cold areas, the cooking surface temperature of the cooking utensil is lower than the optimum temperature, so that the cooking surface temperature of the cooking utensil is not lowered even if the outside air temperature is low. It is not automatically cooked while maintaining the normal optimum temperature.

  In the roaster of the present invention, when the temperature of the outer box rises by a predetermined temperature or more than the reference temperature, the control means stores a temperature obtained by adding the predetermined temperature to the reference temperature as a new reference temperature, and thereafter the reference temperature thermal power level. Is preferably determined based on the new reference temperature.

  Due to the above feature, automatic cooking can be performed while avoiding the phenomenon that the entire roaster is radiated with the passage of time and the temperature of the cooking utensils is lowered.

  According to the present invention, it is possible to automatically adjust the output of the heating source and maintain the baking surface temperature of the cooking utensil at an optimum temperature, so that wasteful energy consumption is suppressed and automatic cooking is performed regardless of the ingredients. can do.

It is a schematic sectional drawing of the roaster of this invention. It is a figure showing the incidental installation of the roaster of this invention. It is a schematic plan view of the roaster of this invention. It is a block diagram showing the control system of the roaster of this invention. It is a flowchart showing the whole flow of automatic operation. It is a flowchart showing the flow of setting of reference temperature. It is a flowchart showing the flow of the setting of the thermal power level of a flame burner. It is a flowchart showing the flow of the setting of the thermal power level of a flame burner. It is a flowchart showing the flow of the setting of the thermal power level of a flame burner.

  The present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. The present invention is not limited to the following embodiments, and can be appropriately changed without departing from the gist thereof.

  FIG. 1 is a schematic sectional view of a roaster 1 of the present invention. The roaster 1 includes a table 2, an outer box 3 disposed in an opening provided in the table 2, and an inner box 4 included in the outer box 3. A filter 5 is arranged in the space between the outer box 3 and the inner box 4. The filter 5 is connected to an exhaust fan (not shown).

  A step 3a is provided in the upper part of the outer box 3, and a top ring 6 is disposed on the step 3a. When the exhaust fan is activated, when the roaster 1 is used, smoke generated from food materials on the cooking tool 7 described later is sucked from the top ring 6, and the smoke is discharged out of the roaster 1 through the filter 5. Thereby, the roaster 1 functions as a so-called smokeless roaster. However, the roaster 1 may be a so-called smoked roaster without the filter 5, the exhaust fan, and the top ring 6.

  The inner box 4 includes a bottom wall 4a, an outer peripheral wall 4b rising from an outer end of the bottom wall 4a, and an inner peripheral wall 4c rising from an inner end of the bottom wall 4a. A substantially flat step portion 4d extending outward from the outer peripheral wall 4b is provided on the upper portion of the outer peripheral wall 4b. A cooking utensil 7 is placed on the step 4d. As the cooking utensil 7, a net or a rooster is used.

  A space surrounded by the bottom wall 4 a, the outer peripheral wall 4 b and the inner peripheral wall 4 c of the inner box 4 forms a drain space 8. The drain space 8 is filled with water and receives oil falling from the ingredients on the cooking utensil 7. This prevents oil or the like falling from the ingredients on the cooking utensil 7 from sticking to the bottom wall 4a and the like, and facilitates regular cleaning.

  A flame burner 9 is disposed in the space surrounded by the inner peripheral wall 4 c of the inner box 4. A hot plate receiver 10 is disposed above the flame burner 9 and at the upper end of the inner peripheral wall 4 c of the inner box 4. A hot plate 11 is placed on the hot plate receiver 10. The hot platen 11 is heated by the flame of the flame burner 9, and the cooking utensil 7 is heated by the hot air generated thereby. In place of the hot plate 11, ceramic charcoal (not shown) made of heat-resistant ceramics or lava charcoal (not shown) made of heat-resistant ceramics can also be used. When using ceramic charcoal or lava charcoal instead of the hot plate 11, a support member (not shown) made of wire is used instead of the hot plate receiver 10, and ceramic charcoal or Lava charcoal is used by being arranged in a circular shape in plan view.

  FIG. 2 is a schematic diagram showing the incidental equipment of the roaster 1. As shown in FIG. 2, the flame burner 9 is connected to a gas supply source 13 such as city gas by a pipe 12. The pipe 12 is provided with an electromagnetic control valve 14 for adjusting the amount of gas sent from the gas supply source 13 to the flame burner 9.

  FIG. 3 is a schematic plan view of the roaster 1. However, the table 2 is indicated by a broken line. As shown in FIG. 3, the table 2 is provided with a sheet key 15. The seat key 15 is provided with a switch for selecting manual operation or automatic operation of the roaster 1, and the seat key 15 is electrically connected to a control means 20 described later.

  Temperature sensors 30 (30a, 30b) (an example of temperature detection means) for measuring the temperature of the outer box 3 are attached to two locations on the outer wall surface of the outer box 3, respectively. The temperature sensor 30 is, for example, a thermistor. In this embodiment, a plurality of temperature sensors 30 are provided, but one temperature sensor may be provided.

  In the present invention, at the time of cleaning the roaster 1, the cooking tool 7 is removed from the roaster 1 together with the top ring 6 and the inner box 4, so it is difficult to attach the temperature sensor 30 to the cooking tool 7. That is, it is difficult to directly measure the burning surface temperature of the cooking utensil 7 by attaching the temperature sensor 30 to the cooking utensil 7. Therefore, in the present invention, the temperature sensor 30 is attached to the outer wall surface of the outer box 3. In this case, when the correlation data between the temperature of the outer box 3 and the temperature of the cooking utensil 7, that is, the baking surface temperature of the cooking utensil 7 is the optimum temperature (for example, 250 ° C.), the temperature of the outer box 3 is increased several times. It is necessary to obtain in advance data on what will happen. Accordingly, the temperature of the cooking utensil 7 can be estimated from the temperature of the outer box 3 without measuring the temperature of the cooking utensil 7, and the temperature control of the cooking utensil 7 can be performed by the temperature control of the outer box 3.

  FIG. 4 is a block diagram showing a control system of the roaster 1. As shown in FIG. The roaster 1 includes a control means 20. The control unit 20 includes a timer, a storage unit, a calculation unit, a determination unit, and the like (not shown). A temperature sensor 30 (30a, 30b) is connected to the control means 20 as an input device, and an electromagnetic control valve 14 and an alarm generator 40 are connected as output devices.

  The control means 20 makes various determinations by comparing information from the temperature sensor 30 or information calculated based on the information from the temperature sensor 30 with information stored in the control means 20 in advance. A command is issued to the electromagnetic control valve 14 and the alarm generator 40. In the present embodiment, the control unit 20 calculates the temperature change rate α based on the temperature output from the temperature sensor 30, for example.

In the present invention, the temperature change rate α at a certain time t is
α = T / T '
T: Temperature of outer box 3 at time t T ′: Value calculated from temperature of outer box 3 a predetermined time before time t (for example, 30 seconds before).

In this specification, the current (latest) temperature change rate α is expressed as α _NOW, and the temperature change rate α _NOW is
α _NOW = T _NOW / T _OLD
T _NOW : Current temperature of the outer box 3 T _OLD : Calculated by the temperature of the outer box 3 a predetermined time before (for example, 30 seconds before). Further, as will be described later, the temperature change rate calculated (acquired) immediately before the temperature change rate α _NOW is expressed as α _OLD .

here,
α _NOW = (T _NOW / T _OLD ) -1
The value obtained by subtracting “1” from (T _NOW / T _OLD ) may be α _NOW . This is because the temperature does not change when the current temperature T _NOW of the outer box 3 and the temperature T _OLD of the outer box 3 a predetermined time before are the same value, and the temperature change rate α _NOW = 0 (temperature change) This is because it is easier to understand that the rate is zero. However, the number subtracted from (T _NOW / T _OLD ) or the number added to (T _NOW / T _OLD ) is arbitrary.

In the present embodiment, the control means 20 is an average over a period from the current temperature (Ta, Tb) output from the two temperature sensors 30 (30a, 30b) to a predetermined time before (for example, one minute before). temperature _{(Ta MAV, Tb MAV)} (moving average temperature) were calculated, their moving average temperature _{(Ta MAV, Tb MAV)} arithmetic mean temperature _T AV of _{(T AV = (Ta MAV +} Tb MAV) / 2) And the temperature change rate α of the temperature of the outer box 3 is calculated using the arithmetic average temperature T _AV as the temperature of the outer box 3.

That is, the current temperature change rate α _NOW is
α _NOW = ( _{TAV_NOW} / _{TAV_OLD} ) -1
_{TAV_NOW} : current arithmetic average temperature of the outer box 3 _{TAV_OLD} : calculated by the arithmetic average temperature of the outer box 3 a predetermined time before (for example, 30 seconds before). _{Incidentally, (T AV_NOW /} T _{AV_OLD)} from "1" are we value the temperature change rate alpha _{the NOW} minus, the street, the current arithmetic mean temperature _{T AV_NOW} a predetermined time before the outside of the outer box 3 _This is because, when the arithmetic average temperature T _{AV_OLD} of the box 3 is the same value, it is easier to understand that the temperature does not change and that the temperature change rate α _NOW = 0.

Then, the control means 20 determines the thermal power level F of the flame burner 9 based on the temperature change rate α _NOW , adjusts the opening of the electromagnetic control valve 14 according to the thermal power level F, and supplies it to the flame burner 9. The gas flow rate is controlled, and the heating power of the flame burner 9 is adjusted.

In the present invention, the heating power level F of the flame burner 9 is controlled based on the temperature change rate α _NOW of the outer box 3 because the temperature change of the outer box 3 is slightly smaller than the temperature change of the cooking utensil 7. However, a time delay occurred while the temperature change rate α _NOW of the outer box 3 hardly caused a time delay with respect to the temperature change of the cooking utensil 7. That is, in the process of developing the roaster 1, the inventor monitors the temperature change rate α _NOW of the outer box 3 so that the flame burner does not cause a time delay even if the temperature of the cooking utensil 7 changes suddenly. It is based on the discovery that the burning surface temperature of the cooking utensil 7 can be maintained at the optimum temperature by adjusting the thermal power level F of 9.

  In this embodiment, the thermal power level F of the flame burner 9 is controlled by step control, and is controlled by six levels of thermal power from “0” to “5”. The thermal power level “1” is the smallest thermal power, and the thermal power level “5” is the largest thermal power. The heating power level of “0” is a state in which the electromagnetic control valve 14 is fully closed, no gas is supplied from the gas supply source 13 to the flame burner 9, and the flame of the flame burner 9 has disappeared. .

Further, when the fluctuations in the temperature (Ta, Tb) of the outer box 3 output from the two temperature sensors 30 are large, the moving average temperatures (Ta _MAV , A method of calculating Tb _MAV ) is useful. As a result, the temperature detection of the outer box 3 having a large variation can be stabilized, and the average temperature change rate of the outer box 3 can be accurately calculated even when the temperature distribution of the outer box 3 is large and unbalanced. However, when the fluctuations in the temperature (Ta, Tb) of the outer box 3 output from the temperature sensor 30 are not large, the movement of the outer box 3 output from the two temperature sensors 30 is not calculated without calculating the moving average temperature. The arithmetic average temperature of the temperatures (Ta, Tb) may be calculated as the temperature of the outer box 3. In addition, when only one temperature sensor 30 is used, the temperature from the temperature sensor 30 is adopted as it is without calculating the arithmetic average temperature, or the moving average temperature is calculated and the temperatures are calculated. The temperature of the outer box 3 may be set.

  FIG. 5 is a flowchart showing the overall flow of the automatic operation of the roaster 1. The overall flow of the automatic operation will be described with reference to FIG.

  When automatic operation of the seat key 15 is selected, the roaster 1 is activated, and the control means 20 determines whether or not the flag Ts = 2 (S1). The flag Ts is a flag for determining whether or not setting of a reference temperature to be described later is completed, and the initial value is set to “3”. Note that the flag Ts = 3 means that both the setting of the first reference temperature and the setting of the second reference temperature are incomplete, and the flag Ts = 2 indicates that the setting of the reference temperature has been completed. The flag Ts = 1 means that the setting of the first reference temperature is completed but the setting of the second reference temperature is not completed.

  When the control means 20 determines that the flag Ts is not 2 (S1: NO), the control means 20 proceeds to the setting of the reference temperature (S10 to S20, see FIG. 6).

After setting the reference temperature, or when the control unit 20 determines that the flag Ts = 2 (S1: YES), the control unit 20 has the flag LOW = 1 and the current temperature _{TAV_NOW} of the outer box 3 is the control unit. It is determined whether or not the temperature is higher than a predetermined temperature T1 (for example, 45 ° C.) stored in advance 20 (S2). The flag LOW is a flag for determining whether or not to maintain the thermal power level F of the flame burner 9 at a predetermined value regardless of the value of the temperature change rate α _NOW , and the initial value is set to “2”. When the flag LOW = 1, it is determined that the cooking utensil 7 is not sufficiently heated, and the baking surface temperature of the cooking utensil 7 has not reached the optimum temperature, and the thermal power level F of the flame burner 9 is the rate of temperature change. The predetermined value is maintained regardless of the value of α _NOW . Further, when the flag LOW = 0, the thermal power level F of the flame burner 9 is determined based on the temperature change rate _αNOW .

When the control unit 20 determines that the flag LOW = 1 and the current temperature _{TAV_NOW} of the outer box 3 is higher than the predetermined temperature T1 (S2: YES), the control unit 20 sets the flag LOW to “0” (S3). ). If the current temperature _{TAV_NOW} of the outer box 3 is higher than the predetermined temperature T1, it is determined that the burning surface temperature of the cooking utensil 7 has reached the optimum temperature, the flag LOW is set to “0”, and the flame burner 9 The control is shifted to the control based on the temperature change rate α _NOW .

After S3, or when the control means 20 determines that the condition that the flag LOW = 1 and the current temperature _{TAV_NOW} of the outer box 3 is higher than the predetermined temperature T1 is not satisfied (S2: NO), the control means 20 current temperature _{Ta _NOW} and temperature _{Tb _NOW} of the outer box 3, which is output from the two temperature sensors 30 are both predetermined temperature is stored in the control unit 20 T2 (e.g., 140 ° C.) whether lower than Determine (S4). S4 is a step in which it is determined whether or not the temperature of the roaster 1 has risen abnormally excessively, and a danger such as a fire is prevented in advance. Therefore, the predetermined temperature T2 is set to a temperature at which it is determined that there is a risk of fire or the like when the temperature rises further. In S4, as described above, the control means 20 makes a determination based on _{Ta_NOW} and _{Tb_NOW} instead of _{TAV_NOW} as the current temperature of the outer box 3. As described above, S4 is the temperature of the roaster 1. It is a step to determine whether or not the temperature has risen abnormally and to prevent dangers such as fire in advance, so rather than making a determination based on the _{TAV_NOW} that is the arithmetic average temperature as the temperature of the outer box 3 , better performing judgment based on the temperature _{Ta _NOW} and _{Tb _NOW} detected by the temperature detecting means 30 (30a, 30b) is because allows more precise control.

When the control means 20 determines that both the current temperature _{Ta_NOW} and the temperature _{Tb_NOW} of the outer box 3 are lower than the predetermined temperature T2 (S4: YES), the setting of the thermal power level (S30 to S56 in FIGS. 7 to 9). To see).

When the control means 20 determines that at least one of the current temperature _{Ta_NOW} and the temperature _{Tb_NOW} of the outer box 3 is _equal to or higher than the predetermined temperature T2 (S4: NO), the control means 20 causes the temperature of the roaster 1 to rise abnormally. The thermal power level F of the thermal power burner 9 is set to “0” (S5). That is, the control means 20 gives a command to fully close the electromagnetic control valve 14 and shuts off the gas supplied from the gas supply source 13 to the flame burner 9. Further, the control means 20 turns on the alarm generating device 40 (S6), generates an alarm sound, and stops the operation of the roaster 1.

  After the setting of the thermal power level (S30 to S56) is completed, the control means 20 determines whether or not to continue the operation (S7). If the control means 20 determines that the operation is to be continued (S7: YES), the process returns. When the control means 20 determines that the operation is not continued (S7: NO), the operation of the roaster 1 is stopped.

<Setting of reference temperature>
FIG. 6 is a flowchart showing the flow of setting the reference temperature (S10 to S20). The setting of the reference temperature will be described with reference to FIG.

  The control means 20 determines whether or not the flag Ts = 3 (S10).

  When the control unit 20 determines that the flag Ts = 3 (S10: YES), the control unit 20 determines whether or not a first predetermined time t1 (for example, 8 minutes) stored in advance in the control unit 20 has elapsed. Determine (S11).

  When the control means 20 determines that the first predetermined time t1 has not elapsed (S11: NO), the control means 20 ends the setting of the reference temperature.

When the control means 20 determines that the first predetermined time t1 has elapsed (S11: YES), the control means 20 determines a predetermined temperature change rate range (upper limit) in which the temperature change rate α _NOW is stored in the control means 20 in advance. It is determined whether the value is within α1 and the lower limit is α2) (S12). S12 is a step of determining whether or not the current temperature _{TAV_NOW} of the outer box 3 has become substantially constant. Therefore, the predetermined temperature change rate range is set to a range in which the current temperature T _{AV_NOW} of the outer box 3 can be regarded as being substantially constant if the temperature change rate α _NOW is within the predetermined temperature change rate range.

When the control means 20 determines that the temperature change rate α _NOW is not within the predetermined temperature change rate range (S12: NO), the control means 20 uses the second predetermined time t2 (however, stored in the control means 20 in advance). , T1 <t2, and whether or not t2 is 13 minutes has elapsed (S13).

  When the control unit 20 determines that the second predetermined time t2 has not elapsed (S13: NO), the control unit 20 ends the setting of the reference temperature.

When the control means 20 determines that the temperature change rate α _NOW is within the predetermined temperature change rate range (S12: YES), or when the control means 20 determines that the second predetermined time t2 has elapsed (S13: YES), the control means 20 stores the current temperature _{TAV_NOW} of the outer box 3 as the reference temperature (first reference temperature) Ts, and sets the flag Ts to “1” (S14).

After S14, the control means 20 determines whether or not the current temperature _{TAV_NOW} of the outer box 3 is lower than a predetermined temperature T1 (for example, 45 ° C.) (S15).

When the control means 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is lower than the predetermined temperature T1 (S15: YES), the control means 20 sets the flag LOW to “1” (S16). As described above, when the current temperature _{TAV_NOW} of the outer box 3 is lower than the predetermined temperature T1, the cooking utensil 7 is not sufficiently heated, and the baking surface temperature of the cooking utensil 7 has not reached the optimum temperature. Therefore, the heating power level F of the flame burner 9 is maintained at a predetermined value regardless of the value of the temperature change rate α _NOW , and the cooking utensil 7 is continuously heated. As will be described later, in this embodiment, when the flag LOW = 1, the thermal power level F of the flame burner 9 is set to “4” (see S56 in FIG. 9).

After S16, or when the control means 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is _equal to or higher than the predetermined temperature T1 (S15: NO), the control means 20 determines that the first reference temperature Ts is the control means 20 It is determined whether or not the temperature is equal to or higher than a predetermined temperature T3 (for example, 50 ° C.) stored in advance (S17).

  When the control means 20 determines that the first reference temperature Ts is lower than the predetermined temperature T3 (S17: NO), the control means 20 rewrites the first reference temperature Ts to the predetermined temperature T3 (S18), The setting is finished (setting of the first reference temperature is completed). In S18, when the control unit 20 determines that the first reference temperature Ts is lower than the predetermined temperature T3, the first reference temperature Ts is rewritten to the predetermined temperature T3, particularly in winter and cold regions. Since the baking surface temperature of the utensil 7 is lower than the optimum temperature, the normal optimum temperature is constantly maintained without being affected by the outside air temperature so that the burning surface temperature of the cooking utensil 7 does not decrease even if the outside air temperature is low. And automatic cooking.

  When the control unit 20 determines that the first reference temperature Ts is equal to or higher than the predetermined temperature T3 (S17: YES), the control unit 20 finishes setting the reference temperature (setting of the first reference temperature is completed).

When the control unit 20 determines that the flag Ts is not 3 (S10: NO), that is, when the flag Ts = 1, the control unit 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is Ts + T4 (Ts: first reference). Temperature T4: It is determined whether T4> 0, for example, T4 = 4 ° C. or higher (S19).

When the control means 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is equal to or lower than Ts + T4 (S19: NO), the setting of the reference temperature is ended.

When the control means 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is higher than Ts + T4 (S19: YES), the control means 20 stores Ts + T4 as a new reference temperature (second reference temperature) Ts. At the same time, the flag Ts is set to “2” (S20), and the setting of the reference temperature is finished (setting of the second reference temperature is completed).

After setting the first reference temperature, when the current temperature _{TAV_NOW} of the outer box 3 increases from the first reference temperature by a predetermined temperature T4 or more, by setting Ts + T4 as a new reference temperature (second reference temperature), The entire roaster 1 is radiated with the passage of time, and automatic cooking can be performed while avoiding the phenomenon that the burning surface temperature of the cooking utensil 7 decreases.

<Setting of the flame power level of the flame burner>
FIG. 7 is a flowchart showing the flow of setting of the thermal power level F of the flame burner 9 (S30 to S38). The setting of the thermal power level F of the flame burner 9 will be described with reference to FIG.

The control means 20 sets the reference temperature thermal power level _FTs and the temperature change rate thermal power level F _α to the thermal power level F of the flame burner 9 (S30).

  The control means 20 determines whether or not the flag Ts = 1 or the flag Ts = 2 (S31).

  When the control means 20 determines that neither flag Ts = 1 nor flag Ts = 2 (S31: NO), that is, when flag Ts = 3 (both the first reference temperature and the second reference temperature are set). If not, the control means 20 sets the fire power level F of the flame burner 9 to “5” (S32). Then, the control means 20 determines whether or not the flag LOW = 1 (see S55 in FIG. 9). Since the flag LOW = 1 is not satisfied in the state of the flag Ts = 3, the control unit 20 determines that the flag LOW = 1 is not satisfied (S55: NO), and ends the setting of the thermal power level F of the flame burner 9. In this way, the flame burner 9 is set to the thermal power level “5” which is the largest thermal power until the first reference temperature Ts is set after the start of the roaster 1. This is because when the roaster 1 is activated, the cooking utensil 7 and the hot plate 11 remain cold, and the cooking utensil 7 is heated by setting the heating power level F of the flame burner 9 to the highest thermal power level. This is to shorten the time during which the surface temperature is heated to the optimum temperature.

When the control unit 20 determines that the flag Ts is “1” or “2” (S31: YES), the control unit 20 determines the current temperature _{TAV_NOW} of the outer box 3 and a predetermined reference stored in the control unit 20. Comparison with the temperature range (upper limit value: Ts + T4, lower limit value: Ts−T5) is executed (S33).

When the control unit 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is higher than Ts + T4, that is, the second reference temperature, it is determined that the burning surface temperature of the cooking utensil 7 is higher than the optimum temperature. The control means 20 sets a value obtained by lowering the current reference temperature thermal power level _FTs by “1” as a new reference temperature thermal power level _FTs (S34). Incidentally, as described above, the control unit 20 in S30 sets the reference temperature thermal level F _Ts in thermal power level F of the flame burner 9, set to "5" the thermal power level F of the flame burner 9 when starting the roaster 1 in S32 _Therefore , the initial value of the reference temperature thermal power level _FTs is also “5”.

When the control means 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is equal to or lower than Ts−T5 (where T5> 0, for example, T5 = 1 ° C.), the baking surface temperature of the cooking utensil 7 is lower than the optimum temperature. The control means 20 sets a value obtained by increasing the current reference temperature thermal power level _FTs by “1” as a new reference temperature thermal power level _FTs (S35).

If the control unit 20 determines that the current temperature _{TAV_NOW} of the outer box 3 is greater than Ts−T5 or less than Ts + T4, it is determined that the baked surface temperature of the cooking utensil 7 is maintained at the optimum temperature, control means 20 does not change the reference temperature thermal level F _Ts, to maintain the current reference temperature thermal level F _Ts.

The reference temperature thermal power level F _Ts compares the current temperature T _{AV_NOW} of the outer box 3 with a predetermined reference temperature range stored in the control means 20, and the current temperature T _{AV_NOW of} the outer box 3 is higher than the upper limit value. lowering the reference temperature thermal level F _Ts if, on the other hand, since the current temperature T _{AV_NOW} of the outer box 3 is determined so as to increase the reference temperature thermal level F _Ts in the case of less than the lower limit value, cooking utensil 7 Since the heating power level F of the flame burner 9 can be set by imagining the burning surface temperature of the flame and monitoring the burning surface temperature of the cooking utensil 7, the heating power can be automatically adjusted.

Next, the control means 20 compares the reference temperature thermal power level _FTs with the reference temperature thermal power level range (upper limit value: 4, lower limit value: 2) stored in advance in the control means 20 (S36).

When the control means 20 determines that the reference temperature thermal power level _FTs is greater than “4”, the control means 20 sets the reference temperature thermal power level _FTs to “4” (S37).

When the control means 20 determines that the reference temperature thermal power level _FTs is smaller than “2”, the control means 20 sets the reference temperature thermal power level _FTs to “2” (S38).

When the control means 20 determines that the reference temperature thermal power level is “2” or more and “4” or less, that is, when the reference temperature thermal power level _FTs is “2”, “3” or “4”, the control means 20 without changing the temperature thermal level F _Ts, to maintain the current reference temperature thermal level F _Ts.

  The setting of the thermal power level F of the flame burner 9 will be further described with reference to FIG. 8 (S39 to S46).

The control means 20 calculates the difference between the current temperature change rate α _NOW and the temperature change rate α _OLD acquired _immediately before the temperature change rate α _NOW , and the difference is “0” or more, or “ It is determined whether it is smaller than 0 (S39). In this embodiment, since the temperature change rate α is calculated (obtained) every 5 seconds, α _OLD is the value of the temperature change rate 5 seconds before α _NOW .

When the control unit 20 determines that the difference between the temperature change rate α _NOW and the temperature change rate α _OLD is “0” or more, the control unit 20 determines whether the temperature change rate α _NOW is α3 (where α3> 0) or more. Determine (S40). S40 is a step of determining whether or not the current temperature _{TAV_NOW} of the outer box 3, that is, the surface temperature of the cooking utensil 7 is rapidly increasing. Therefore, .alpha.3, the temperature change rate alpha _{the NOW} is set to a value regarded as baked surface temperature has skyrocketed in cooker 7 If this value or more.

When the control means 20 determines that the temperature change rate α _NOW is equal to or greater than α3 (S40: YES), it is determined that the current temperature T _{AV_NOW} of the outer box 3, that is, the burning surface temperature of the cooking utensil 7 is rapidly increasing, The control means 20 sets a value obtained by lowering the temperature change rate thermal power level F _α by “1” as a new temperature change rate thermal power level F _α (S41).

When the control means 20 determines that the temperature change rate α _NOW is smaller than α3 (S40: NO), it is determined that the current temperature T _{AV_NOW} of the outer box 3, that is, the baking surface temperature of the cooking utensil 7 is substantially constant. , the control unit 20 does not change the rate of temperature change thermal level F _alpha, maintains the current rate of temperature change thermal level F _alpha. Incidentally, the streets, the control unit 20 in S30 is the temperature change rate thermal level F _alpha set thermal power level F of the flame burner 9, the thermal power level F of the flame burner 9 in S32 the startup roaster 1 to "5" In order to set, the initial value of the temperature change rate thermal power level _Fα is also “5”.

When the control unit 20 determines that the difference between the temperature change rate α _NOW and the temperature change rate α _OLD is smaller than “0”, the control unit 20 determines that the temperature change rate α _NOW is α4 or less (where α4 ≦ 0). It is determined whether or not (S42). S42 is a step of determining whether or not the current temperature T _{AV_NOW} of the outer box 3, that is, whether the surface temperature of the cooking utensil 7 has dropped. Thus, alpha 4, the temperature change rate alpha _{the NOW} is set to the considered value has dropped baked surface temperature of the cooking utensil 7 is smaller than this value.

When the control means 20 determines that the temperature change rate α _NOW is equal to or less than α4 (S42: YES), it is determined that the current temperature T _{AV_NOW} of the outer box 3, that is, the burning surface temperature of the cooking utensil 7 is _decreasing , The control means 20 sets a value obtained by increasing the temperature change rate thermal power level F _α by “1” as a new temperature change rate thermal power level F _α (S43).

When the control means 20 determines that the temperature change rate α _NOW is larger than α4 (S42: NO), it is determined that the current temperature T _{AV_NOW} of the outer box 3, that is, the baking surface temperature of the cooking utensil 7 is substantially constant. , the control unit 20 does not change the rate of temperature change thermal level F _alpha, maintains the current rate of temperature change thermal level F _alpha.

The temperature change rate thermal level F _alpha, compared with a predetermined temperature change rate range stored in the temperature coefficient alpha _{the NOW} and the control unit 20, the temperature change when the temperature change rate alpha _{the NOW} is higher than the upper limit value reduce the rate thermal power level F _alpha, whereas, since it is determined to raise the temperature change rate thermal level F _alpha if the temperature change rate alpha _{the NOW} is less than the lower limit value, the monitoring of baked surface temperature of the cooking utensil 7 It is possible to control the thermal power level F of the flame burner 9 in order to avoid a rapid temperature rise in advance. As a result, it is possible to prevent the flame from becoming large as a result of the flame rising process, which is useful for disaster prevention of the roaster 1. It is also suitable for cooking foods that are particularly rich in fats and oils.

The control means 20 compares the temperature change rate thermal power level _Fα with the temperature change rate level range (upper limit value: 4, lower limit value: 2) stored in advance in the control means 20 (S44).

When the control means 20 determines that the temperature change rate thermal power level F _α is greater than “4”, the control means 20 sets the temperature change rate thermal power level F _α to “4” (S45).

When the control means 20 determines that the temperature change rate thermal power level F _α is smaller than “2”, the control means 20 sets the temperature change rate thermal power level F _α to “2” (S46).

When the control means 20 determines that the temperature change rate thermal power level F _α is “2” or more and “4” or less, that is, when the temperature change rate thermal power level F _α is “2”, “3” or “4” means 20 does not change the rate of temperature change thermal level F _alpha, maintains the current rate of temperature change thermal level F _alpha.

  The setting of the thermal power level F of the flame burner 9 will be further described with reference to FIG. 9 (S47 to S56).

The control means 20 compares the temperature change rate α _NOW with the temperature change rate range stored in advance in the control means 20 (S47).

If the temperature change rate alpha _{the NOW} determines the control means 20 and α3 above (i.e., S40: YES), of the control unit 20 sets the heating power level F of the flame burner 9 to a value of the temperature change rate thermal level F _alpha (S48). In this case, it can be determined that the current temperature T _{AV_NOW} of the outer box 3, that is, the surface temperature of the cooking utensil 7 is rapidly increasing. Therefore, the temperature change rate thermal power level F _α is adopted as the thermal power level F of the flame burner 9.

When the control means 20 determines that the temperature change rate α _NOW is smaller than α3 (ie, S40: NO), or when the control means 20 determines that the temperature change rate α _NOW is greater than α4 (ie, S42). : NO), the control means 20 sets the thermal power level F of the flame burner 9 to the value of the reference temperature thermal power level _FTs (S49). In this case, it can be determined that the current temperature _{TAV_NOW} of the outer box 3, that is, the baking surface temperature of the cooking utensil 7, is substantially constant. Therefore, the reference temperature thermal power level F _Ts determined based on the comparison between the current temperature T _{AV_NOW} of the outer box 3 and the reference temperature range stored in the control means 20 is adopted as the thermal power level F of the flame burner 9. .

When the control unit 20 determines that the temperature change rate α _NOW is equal to or less than α4 (that is, in the case of S42: YES), the control unit 20 determines whether or not the temperature change rate thermal power level F _α is equal to or higher than the reference temperature thermal power level _FTs. (S50).

When the control means 20 determines that the temperature change rate thermal power level _Fα is equal to or higher than the reference temperature thermal power level _FTs (S50: YES), the control means 20 sets the thermal power level F of the flame burner 9 to the value of the temperature change rate thermal power level _Fα . (S51).

When the control means 20 determines that the temperature change rate thermal power level F _α is smaller than the reference temperature thermal power level _FTs (S50: NO), the control means 20 sets the thermal power level F of the flame burner 9 to the reference temperature thermal power level _FTs . A value is temporarily set (S52).

That is, in S50, the temperature change rate thermal power level _Fα and the reference temperature thermal power level _FTs are compared, and the larger one is temporarily set as the thermal power level F of the flame burner 9 in S51 or S52. When the temperature change rate α _NOW is α4 or less, it can be determined that the temperature of the cooking utensil 7 is decreasing. Therefore, in order to increase the temperature of the cooking utensil 7, the temperature change rate thermal power level F _α and the reference temperature thermal power level whichever is greater with F _Ts once is set as thermal power level F of the flame burner 9.

The control means 20 calculates the difference between the thermal power level F of the flame burner 9 set in S51 or S52 and the thermal power level F _OLD of the flame burner 9 acquired immediately before, and the difference is more than “1”. It is determined whether it is larger or less than "1" (S53).

When the control means 20 determines that the difference is greater than “1” in S53, the control means 20 sets the value obtained by increasing the fire power level F _OLD of the flame burner 9 acquired by “1” to the value of the flame burner 9. It is set as the thermal power level F (S54). When the difference between the thermal power level F of the flame burner 9 set in S51 or S52 and the thermal power level F _OLD is larger than “1”, the thermal power level F of the flame burner 9 set in S51 or S52 is adopted as it is. Because the flame power of the flame burner 9 is too strong, the burning surface temperature of the cooking utensil 7 suddenly rises and greatly exceeds the optimum temperature, and as a result, the burning surface temperature of the cooking utensil 7 may fluctuate near the optimum temperature. It is. That is, when the difference between the thermal power level F and the thermal power level F _{OLD of} the flame burner 9 set in S51 or S52 is larger than “1”, the value obtained by increasing the thermal power level F _OLD by “1” is set to flame. By setting it as the thermal power level F of the burner 9, the surface temperature of the cooking utensil 7 is made to approach the optimum temperature smoothly.

If the difference is the control means 20 and the "1" is determined in S53, the control unit 20 the reference temperature thermal level F _Ts set by the temperature change rate thermal level F _alpha or S52, which is set in S51 of flame burner 9 Maintain as fire level F.

  The control means 20 determines whether or not the flag LOW = 1 (S55).

When the control means 20 determines that the flag LOW = 1 (S55: YES), the control means 20 sets the heating power level F of the flame burner 9 to “4” (S56). As described above, since it is considered that the burning surface temperature of the cooking utensil 7 does not reach the optimum temperature, the heating power level F of the flame burner 9 is maintained at a predetermined value regardless of the value of the temperature change rate α _NOW and cooked. This is to continue heating the tool 7. Further, as described above, until the first reference temperature Ts is set, the thermal power level F of the flame burner 9 has been set to “5” which is the maximum thermal power. When set, the fire power level F of the flame burner 9 is set to “4”.

  When the control means 20 determines that the flag LOW is not 1 (S55: NO), the setting of the thermal power level F of the flame burner 9 is terminated.

In the present invention, either the temperature change rate thermal power level F _α or the reference temperature thermal power level FTs is adopted as the thermal power level F of the flame burner 9 based on the temperature change rate α _NOW . As described above, in the case of ingredients with a lot of fat such as pork ribs and hormones, the flame of the flame burner 9 is ignited by the oil from the ingredients, and a fire column is set up on the cooking utensil 7, and the burning surface temperature of the cooking utensil 7 Is rapidly increased, and the change appears as a change in the temperature change rate α _NOW of the outer box 3. As described above, the temperature change rate α _NOW of the outer box 3 has little time delay with respect to the temperature change of the cooking utensil 7. Therefore, in this case, the temperature change rate thermal power level F _α determined based on the comparison between the temperature change rate range stored in the control means 20 and the temperature change rate α _NOW is the thermal power level F of the flame burner 9. Adopted. In this way, the heating power of the flame burner 9 can be adjusted from the trend of the temperature change rate α _NOW .

On the other hand, in the case of foods with little fat such as fillet and vegetables, there is almost no fire pillar standing on the cooking utensil 7, so the burning surface temperature of the cooking utensil 7 does not rise rapidly, and the temperature change rate _αNOW is also It becomes almost constant. Therefore, in this case, the current temperature T _{AV_NOW} a reference temperature thermal level F _Ts is thermal level of flame burner 9 is determined based on a comparison of the reference temperature range and outer box 3 stored in the control unit 20 Adopted as F. In this manner, the heating power of the flame burner 9 can be adjusted from the trend of the current temperature _{TAV_NOW} of the outer box 3.

  In the roaster 1 of the present invention, since the heating power level F of the flame burner 9 is automatically adjusted so as to maintain the burning surface temperature of the cooking utensil 7 at the optimum temperature, the loss of fuel (for example, gas) of the flame burner 9 is lost. Can be suppressed. Furthermore, it can prevent as much as possible that the foodstuff on the cooking utensil 7 burns.

DESCRIPTION OF SYMBOLS 1 Roaster 2 Table 3 Outer box 4 Inner box 5 Filter 6 Top ring 7 Cooking tool 8 Drain space 9 Flame burner 10 Hot plate holder 11 Hot plate 12 Pipe 13 Gas supply source 14 Electromagnetic control valve 15 Seat key 20 Control means 30 Temperature Sensor (temperature detection means)
40 Alarm generator

Claims (9)

An outer box,
An inner box enclosed in the outer box;
A cooking utensil placed in the inner box;
A flame burner for heating the cooking utensil;
Temperature detecting means for detecting the temperature of the outer box;
Control means for controlling the heating power of the flame burner,
The control means calculates the temperature change rate of the temperature of the outer box, and adjusts the heating power level of the flame burner based on the calculated temperature change rate.
Roaster characterized by that. The roaster includes a plurality of the temperature detection means,
The control means calculates a moving average temperature for a predetermined time of the temperatures detected by the plurality of temperature detecting means, calculates an arithmetic average temperature from the moving average temperatures, and calculates the arithmetic average temperature as the external temperature. The temperature change rate is calculated from the arithmetic mean temperature as the box temperature.
The roaster according to claim 1. When the calculated temperature change rate satisfies a predetermined condition stored in the control unit, the control unit calculates the calculated temperature change rate and a predetermined temperature change rate range stored in the control unit. A temperature change rate thermal power level determined based on the comparison with is set as the thermal power level of the flame burner,
The roaster according to claim 1 or 2, characterized in that: When the calculated temperature change rate satisfies a predetermined condition stored in the control means, the control means compares the temperature of the outer box with a predetermined reference temperature range stored in the control means. A reference temperature thermal power level determined based on is set as the thermal power level of the flame burner,
The roaster according to claim 1 or 2, characterized in that: The control means includes
The difference between the calculated temperature change rate and the temperature change rate before a predetermined time is 0 or more, and the calculated temperature change rate is the upper limit value of the predetermined temperature change rate range stored in the control means Or the difference between the calculated temperature change rate and the temperature change rate before the predetermined time is smaller than 0, and the calculated temperature change rate is the lower limit of the predetermined temperature change rate range. When larger than the value, a reference temperature thermal power level determined based on a comparison between the temperature of the outer box and a predetermined reference temperature range stored in the control means is set as the thermal power level of the flame burner,
Calculated when the difference between the calculated temperature change rate and the temperature change rate before a predetermined time is not less than 0 and the calculated temperature change rate is not less than the upper limit value of the predetermined temperature change rate range. A temperature change rate thermal power level determined based on a comparison between the temperature change rate and a predetermined temperature change rate range stored in the control means is set as a thermal power level of the flame burner;
The difference between the calculated temperature change rate and the temperature change rate before a predetermined time is smaller than 0, and the calculated temperature change rate is within the predetermined temperature change rate range stored in the control means. When below the lower limit, the reference temperature thermal power level and the temperature change rate thermal power level are compared, and for the larger thermal power level, the difference between the thermal power level and the thermal power level of the flame burner before a predetermined time. If the difference is equal to or less than a predetermined value stored in the control means, the larger one of the reference temperature thermal power level and the temperature change rate thermal power level is set as the thermal power level of the flame burner. When the difference is greater than the predetermined value, a thermal power level obtained by increasing the thermal power level of the flame burner by the predetermined increment before the predetermined time is set as the thermal power level of the flame burner. To,
The roaster according to claim 1 or 2, characterized in that: The temperature change rate thermal power level reduces the thermal power level when the calculated temperature change rate is higher than an upper limit value of a predetermined temperature change rate range stored in the control means, and the predetermined temperature change rate range. When it is lower than the lower limit value, it is decided to increase the thermal power level,
The roaster according to claim 3 or 5, wherein The reference temperature thermal power level is reduced when the temperature of the outer box is higher than an upper limit value of a predetermined reference temperature range stored in the control means, and lower than a lower limit value of the predetermined reference temperature range. Decided to raise the firepower level when low,
The roaster according to claim 4 or 5, characterized by the above-mentioned. The control means includes
If the calculated temperature change rate becomes a value within a predetermined temperature change rate range stored in the control means after the first predetermined time elapses and before the second predetermined time elapses, Store the temperature of the outer box as the reference temperature,
If the calculated temperature change rate does not become a value within the predetermined temperature change rate range stored in the control means even after the second predetermined time has elapsed, the second predetermined time has elapsed. The temperature of the outer box is stored as a reference temperature,
The stored reference temperature is compared with a predetermined temperature stored in the control means, and if the stored reference temperature is equal to or higher than the predetermined temperature, the reference temperature range is determined based on the stored reference temperature. Determining and storing the predetermined temperature as a reference temperature to determine the reference temperature range when the stored reference temperature is lower than the predetermined temperature;
The roaster according to claim 4 or 5, characterized by the above-mentioned. The control means includes
When the temperature of the outer box rises by a predetermined temperature or more than the reference temperature, the temperature obtained by adding the predetermined temperature to the reference temperature is stored as a new reference temperature, and thereafter, the reference temperature heating power level is the new temperature. Determine based on the reference temperature,
The roaster according to claim 8.

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