JP6676470B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device. In particular, the present invention relates to a heating cooker that displays a remaining cooking time until cooking is completed during cooking using a heating cabinet.

  A heating chamber for storing the object to be cooked, a heating means such as a gas burner for heating the inside of the heating chamber, a temperature sensor in the chamber for detecting the temperature in the chamber, a cooking mode, the type of the object to be cooked, and the degree of baking. 2. Description of the Related Art There is known a heating cooker which includes various setting units for setting cooking conditions such as cooking conditions and adjusts a heating amount of a heating means according to a temperature in a refrigerator to heat and cook an object to be cooked.

  For example, in order to set the automatic cooking time so as not to cause overcooking of the object to be cooked, the control means sets the minimum required time Xmin required to substantially bake the object to be cooked with the expected minimum cooking amount. Heating time setting means for performing the heating, heat-up setting means for setting the heating temperature ΔT for finishing baking of the object to be cooked after the minimum required time Xmin is completed, and a gas burner which is burned at least up to the minimum required time Xmin after the start of cooking. A reference temperature setting means for storing the internal temperature S as the reference temperature Tmin is provided, and after the minimum required time Xmin has elapsed, the internal temperature sensor detects the fire extinguishing temperature Z that is higher than the reference temperature Tmin by the finishing baking rise temperature ΔT. If detected, a heating cooker that determines that the baking of the object to be cooked has been completed, automatically extinguishes the gas burner, and notifies the end of automatic cooking has been proposed. (Patent Document 1). Further, in this heating cooker, in order to prevent overcooking of the object to be cooked, it is determined that the toasting of the object to be cooked has been completed after the limit cooking time Xmax has elapsed even when the temperature in the refrigerator does not rise to the fire extinguishing temperature Z. And extinguish the gas burner.

  According to the heating cooker, the end of cooking of the object to be cooked is determined by using not only the cooking time of the minimum required time Xmin and the cooking time of the limit cooking time Xmax but also the temperature in the refrigerator. And the taste of the dish can be improved.

JP 2006-34724 A

  By the way, conventionally, there is known a heating cooker which includes a cooking timer, subtracts a preset cooking time according to a lapse of time, and displays a remaining cooking time until cooking is completed. Therefore, even in a heating cooker in which automatic heating cooking is performed as in Patent Literature 1, if the remaining cooking time until the cooking is completed is displayed, work during and after cooking can be performed efficiently. it can.

  However, when the end of cooking is determined based on not only the cooking time but also the internal temperature as in the heating cooker of Patent Literature 1, it is determined that the cooking is ended unless the internal temperature reaches a predetermined temperature. Since the determination is not made, there is a problem that the cooking end time cannot be predicted at the start of cooking, and the remaining cooking time cannot be accurately displayed. In addition, when the end of cooking is determined based on the temperature in the refrigerator, the cooking end time also changes according to the progress of the cooking of the object to be cooked, so that the remaining cooking time may increase or decrease during cooking. Therefore, if a certain cooking end time is set at the start of cooking, cooking ends before the set cooking end time, or cooking continues even if the cooking end time comes, so that the user feels uncomfortable. There is a problem that the operation timing is shifted or the operation timing is shifted.

  An object of the present invention is to solve the above-described problem, and an object of the present invention is to display a time approximate to an actual remaining cooking time from the start of cooking to the end of cooking when cooking using a heating chamber is performed. It is an object of the present invention to provide a heating cooker that is excellent in usability for a user.

According to one aspect of the invention,
A heating cabinet,
Heating means for heating the heating chamber,
An internal temperature detection unit for detecting an internal temperature in the heating oven,
A display unit for displaying the remaining cooking time,
A minimum required time setting unit that sets a minimum required time Xmin required to substantially bake a subject having an expected minimum cooking amount;
A limit cooking time setting unit that sets a limit cooking time Xmax for forcibly stopping the heating of the heating means regardless of the internal temperature when a certain time has elapsed from the start of cooking;
A cooking end temperature setting unit that sets a cooking end temperature Tf for determining baking of the object to be cooked based on the temperature in the refrigerator;
A remaining cooking time control unit that displays the remaining cooking time on the display unit,
The remaining cooking time control unit obtains the temperature gradient of the internal temperature when the predetermined medium-term determination time is earlier than the minimum required time Xmin, and determines the current internal temperature based on the acquired temperature gradient of the internal temperature. There is provided a heating cooker that calculates a remaining middle cooking time from a time required to raise the temperature to the cooking end temperature Tf and displays the remaining cooking time on a display unit.

In the heating cooker in which the cooking end temperature Tf for determining the baking of the object to be cooked is set, the cooking end time fluctuates depending on the internal temperature during cooking. On the other hand, when the minimum required time Xmin is set, if there is no abnormality such as an error, the cooking is continued at least until the minimum required time Xmin. As approaching, the temperature gradient of the internal temperature becomes gentler than in the early stage of cooking. Further, the temperature in the refrigerator during cooking and the temperature gradient of the temperature in the refrigerator vary depending on the object to be cooked and the heating conditions.
Therefore, in the heating cooker in which the cooking end temperature Tf is set, after the elapse of the predetermined medium-term determination time period before the minimum required time Xmin, the temperature gradient of the internal temperature is acquired, and based on the acquired temperature gradient of the internal temperature. By calculating the time required to raise the current internal temperature to the cooking end temperature Tf, the cooking temperature and the cooking end temperature Tf, which vary depending on the object to be cooked and the heating conditions, can be calculated. The remaining middle cooking time can be displayed on the display unit.

According to another aspect of the present invention,
A heating cabinet,
Heating means for heating the heating chamber,
An internal temperature detection unit for detecting an internal temperature in the heating oven,
A display unit for displaying the remaining cooking time,
A minimum required time setting unit that sets a minimum required time Xmin required to substantially bake a subject having an expected minimum cooking amount;
A limit cooking time setting unit that sets a limit cooking time Xmax for forcibly stopping the heating of the heating means regardless of the internal temperature when a certain time has elapsed from the start of cooking;
A cooking end temperature setting unit that sets a cooking end temperature Tf for determining baking of the object to be cooked based on the temperature in the refrigerator;
A remaining cooking time control unit that displays the remaining cooking time on the display unit,
After the minimum required time Xmin has elapsed, the remaining cooking time control unit obtains the temperature gradient of the internal temperature when the predetermined end determination time comes before the limit cooking time Xmax, and based on the acquired temperature gradient of the internal temperature. In addition, a heating cooker is provided which calculates the remaining cooking time at the end from the time required to raise the current internal temperature to the cooking end temperature Tf and displays the remaining cooking time on the display unit.

In the heating cooker in which the cooking end temperature Tf for determining the baking of the object to be cooked is set, the cooking end time fluctuates depending on the internal temperature during cooking. On the other hand, when the large cooking object or the amount of the cooking object is large, the cooking is continued beyond the minimum required time Xmin. However, when the limit cooking time Xmax is set, as the cooking time approaches the limit cooking time Xmax, the cooking is continued. Since the cooking of the cooking proceeds, the temperature gradient of the internal temperature becomes gentle. Further, the temperature in the refrigerator during cooking and the temperature gradient of the temperature in the refrigerator vary depending on the object to be cooked and the heating conditions.
Therefore, in the heating cooker in which the cooking end temperature Tf is set, after the minimum required time Xmin has elapsed and after the predetermined end determination time has elapsed before the limit cooking time Xmax, the temperature gradient of the internal temperature is acquired and acquired. If the time required to raise the current internal temperature to the cooking end temperature Tf is calculated based on the temperature gradient of the internal temperature, the temperature increase of the internal temperature that varies depending on the object to be cooked and the heating conditions is calculated. The remaining cooking time at the end according to the degree and the cooking end temperature Tf can be displayed on the display unit.

In the heating cooker, preferably,
The remaining cooking time control unit, when the temperature difference between the cooking end temperature Tf and the current inside temperature is larger than the predetermined determination temperature, corrects the middle remaining cooking time or the last remaining cooking time with a predetermined correction value, Display on the display.

As the cooking of the object to be cooked progresses, the temperature gradient of the internal temperature becomes gentler. Therefore, the shorter the cooking time, the larger the temperature gradient of the internal temperature. For this reason, when the time to the cooking end temperature Tf is calculated based on the temperature gradient of the inside temperature as the temperature difference between the cooking end temperature Tf and the current inside temperature is larger, the actual remaining cooking time is shorter. Could be.
However, according to the heating cooker, when the temperature difference between the cooking end temperature Tf and the current inside temperature is larger than the predetermined determination temperature, the middle remaining cooking time or the last remaining cooking time is corrected, so the actual remaining cooking time is corrected. The time approximated by the cooking time can be displayed as the remaining remaining cooking time in the middle period or the remaining cooking time in the final period.

In the heating cooker, preferably,
The remaining cooking time control unit displays the previous middle remaining cooking time or the last remaining cooking time when the current middle remaining cooking time or the last remaining cooking time is larger than the previous middle remaining cooking time or the last remaining cooking time. Display on the section.

The cooking cabinet temperature varies according to the progress of the cooking of the object to be cooked, and the temperature gradient of the cooking cabinet temperature to be acquired also changes accordingly. When the cooking time is calculated, the current middle-term remaining cooking time or the final remaining cooking time may be longer than the previous time.
However, according to the heating cooker, when the current middle-term remaining cooking time or the final remaining cooking time is larger than the previous time, the previous middle-term remaining cooking time or the last remaining cooking time is displayed on the display unit. It is possible to prevent the middle remaining cooking time or the last remaining cooking time that has been increased over time from being displayed.

In the heating cooker, preferably,
When the remaining cooking time control unit is the middle remaining cooking time or the last remaining cooking time is equal to or less than a predetermined lower remaining cooking time or is equal to or longer than a predetermined upper remaining cooking time, the remaining cooking time or the last remaining cooking time is set to Instead, the lower remaining cooking time or the upper remaining cooking time is displayed on the display unit.

The cooking cabinet temperature varies according to the progress of the cooking of the object to be cooked, and the temperature gradient of the cooking cabinet temperature to be acquired also changes accordingly. When the cooking time is calculated, it may be significantly different from the actual remaining cooking time.
However, according to the heating cooker, when the remaining middle cooking time or the remaining remaining cooking time is equal to or less than the predetermined lower remaining cooking time or is equal to or longer than the predetermined upper remaining cooking time, the medium remaining cooking time or the remaining remaining cooking time is not used. Since the lower remaining cooking time or the upper remaining cooking time is displayed on the display unit instead of the cooking time, it is possible to prevent the middle remaining cooking time or the final remaining cooking time that is different from the actual remaining cooking time from being displayed.

  As described above, according to the present invention, when cooking using a heating cabinet is performed, a time approximating the actual remaining cooking time can be displayed from the start of cooking to the end of cooking. Further, according to the present invention, the remaining cooking time does not greatly increase or decrease during cooking. Therefore, the user does not feel a sense of discomfort in the displayed remaining cooking time, and can work in good timing according to the displayed remaining cooking time. This makes it possible to provide a heating cooker that is excellent in user convenience.

FIG. 1 is a schematic perspective view showing an example of the cooking device according to the embodiment of the present invention. FIG. 2 is a schematic vertical sectional view of the cooking device of FIG. 3A and 3B are configuration diagrams illustrating an example of an operation unit of the heating cooker according to the embodiment of the present invention, wherein FIG. 3A illustrates a state during operation, and FIG. 3B illustrates a state during cooking. FIG. 4 is a circuit diagram showing an example of the cooking device according to the embodiment of the present invention. FIG. 5 is a part of a flowchart illustrating an example of a control operation when heating cooking is performed by the heating cooker according to the embodiment of the present invention. FIG. 6 is a part of a flowchart illustrating an example of a control operation when heating cooking is performed by the heating cooker according to the embodiment of the present invention. FIG. 7 is a part of a flowchart illustrating an example of a control operation when heating cooking is performed by the heating cooker according to the embodiment of the present invention. FIG. 8 is a correlation diagram showing an example of the relationship among the cooking time, the temperature in the refrigerator, and the remaining cooking time when cooking with the cooking device according to the embodiment of the present invention.

Hereinafter, the heating cooker according to the present embodiment will be specifically described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an example of a heating cooker according to the present embodiment applied to a gas stove, and FIG. 2 is a schematic longitudinal sectional view thereof. As shown in FIG. 1, the gas stove includes a plurality of stove burners 31, 32, and 33 on an upper surface of a top plate 30, and a grill storage 2 is provided inside the stove body 3. In the grill storage 2, cooking utensils such as a grill 15 made of a metal wire and a grill plate (not shown) are accommodated. In this specification, the direction in which the grill door 21 and the back side of the grill storage 2 face each other is referred to as the front-rear direction, the width direction of the grill storage 2 is referred to as the left-right direction, and the height direction of the grill storage 2 is referred to as the up-down direction.

  As shown in FIG. 2, a grill door 21 that slides back and forth is provided in the front opening 100 of the grill storage 2. A connecting plate 210 is extended below the rear surface of the grill door 21 toward the inside of the grill storage 2, and the supporting frame 18 made of a metal wire on which the juice tray 16 is placed is connected to the connecting plate 210. Have been. The support frame 18 is provided with front and rear support portions 180 for projecting the front and rear sides upward and supporting the grill 15 from below. The grill 15 is a substantially rectangular metal frame, and the food to be cooked is placed on the grill 15 in a state where the front and rear portions of the grill 15 are placed on the support portions 180 before and after the support frame 18. Is placed. Thereby, the grill 15 and the juice tray 16 are pulled out to the front of the grill storage 2 by pulling the grill door 21 forward, and the grill 15 and the juice tray 16 are pushed backward by pushing the grill door 21 backward. 2.

  An upper fire burner 56 is provided at the center of the upper wall in the grill storage 2 to heat the food from above. At a position below the center of the left and right side walls in the grill storage 2, there is provided a lower fire burner 55 for heating the food from the side and below. The lower fire burner 55 may be provided only on one side wall. An exhaust duct 17 is connected to the back end of the grill storage 2, and the exhaust duct 17 serves as an exhaust passage 13.

  A first temperature sensor 14a and a second temperature sensor 14b below the first temperature sensor 14a are provided in the left and right central portions of the rear wall of the grill storage 2. The first and second temperature sensors 14a and 14b detect the inside temperature of the inside of the grill 2 and a detection signal of the inside temperature is output to a control device C described later. In the gas stove according to the present embodiment, control of automatic cooking is executed based on the inside temperature detected by the first temperature sensor 14a, and control of ignition prevention is executed based on the inside temperature detected by the second temperature sensor 14b. Is done.

  Returning to FIG. 1, the operation unit 23 located on the right side of the grill door 21 includes a power switch 29 and a point fire extinguishing switch 24, 25, 26 having both a fire extinguishing function and a fire power adjusting function of the stove burners 31, 32, 33. Are arranged. On the other hand, an operation section 36 formed on the left side of the grill door 21 includes a grill switch 37 having both a function of adjusting the fire / extinguishing power of the upper and lower burners 56 and 55 and a kangaroo-type operation unit 38 below the grill switch 37. Is provided.

  The operation unit 38 is provided with a touch panel type operation unit 380 shown in FIG. 3A is a configuration diagram illustrating an example of an operation at the time of performing predetermined cooking using the grill storage 2, and FIG. 3B is a diagram illustrating a state in which cooking using the grill storage 2 is being performed. It is a block diagram which shows an example. An operation unit 380 is provided for placing an object to be cooked such as fish on the grill 15 in the grill storage 2 and selecting an automatic cooking mode for a predetermined automatic cooking mode such as a grill cooking mode for automatic cooking. A menu switch 381, a cooking selection switch 382 for selecting the type of the object to be cooked from among the automatic cooking modes, and a baking condition selection switch 383 for setting the degree of burning and finishing of the object to be cooked in each automatic cooking mode. And a display unit 384 are provided. For example, as shown in FIG. 3A, when performing automatic cooking of grilled fish using the grill 15, when the user operates the auto menu switch 381, the grill using the grill 15 is selected from a plurality of cooking modes. The net cooking mode is alternatively selected and lit on the display unit 384. In addition, every time the user operates the cooking selection switch 382 after selecting the grill screen cooking mode, dried fish, grilled meat, and fillet are selected and displayed on the display unit 384. Further, after the user selects the grilling, every time the baking condition selection switch 383 is operated, the stronger, the standard, or the weaker burning is selectively selected and lit on the display unit 384. Further, as shown in FIG. 3B, when cooking is started, the type of the selected food and the remaining cooking time are lit on the display unit 384.

  FIG. 4 is a circuit diagram of the gas stove according to the present embodiment. The control device C controls not only the upper and lower burners 56, 55, but also the combustion of the stove burners 31, 32, 33. In the following, only the upper and lower burners 56, 55 will be described, and the stove burners 31, 32, 33 will be described. Will not be described.

  As shown in FIG. 4, branch pipes 551 and 561 branched from a gas supply pipe 550 are connected to the upper and lower burners 56 and 55, respectively, and the gas supply pipe 550 is connected to a main valve V1, a governor G, and an electromagnetic valve. A safety valve V2 is provided. The branch pipes 551 and 561 are provided with thermal power adjusting plates P1 and P2 for adjusting the orifice by operating a stepping motor (not shown) to change the flow rate of the fuel gas, respectively, and are provided downstream of the thermal power adjusting plates P1 and P2. Are provided with latch valves V3 and V4. The operation of the main valve V1, the electromagnetic safety valve V2, the latch valves V3, V4, and the stepping motor is controlled by the control device C. Specifically, when the main valve V1 and the electromagnetic safety valve V2 are opened and closed, the fuel gas is supplied or stopped to both the upper and lower burners 56 and 55. Further, by operating the stepping motor to adjust the orifices of the heating power adjustment plates P1 and P2, the heating power of the upper and lower burners 56 and 55 is changed between the strong heating power and the weak heating power, respectively. Further, the supply of the fuel gas to the upper and lower burners 56 and 55 is shut off by closing the latch valves V3 and V4. Near the flame holes of the upper and lower burners 56 and 55, ignition electrodes 501 and 601 for performing spark discharge by applying a high voltage from the igniter 600 and flame sensors 502 and 602 are provided.

  The control device C includes the first and second temperature sensors 14a and 14b, the power switch 29, the grill switch 37, the main valve V1, the electromagnetic safety valve V2, the stepping motor, the latch valves V3 and V4, the operation unit 380, and the igniter 600. , And the flame sensors 502 and 602 are connected via electric wiring.

  Although not shown, the control device C that controls the grill storage 2 includes a microcomputer that includes a CPU, a ROM, a RAM, a timer, and the like, and stores a control program. The microcomputer has a functional configuration in which the main valve V1, the electromagnetic safety valve V2, the stepping motor, and the latch valves V3 and V4 are operated to control the heating power of the upper and lower burners 56 and 55, thereby heating the inside of the grill storage 2 A combustion control unit for changing the amount, a minimum required time setting unit for setting a minimum required time Xmin required for substantially baking the object to be cooked with the expected minimum required cooking amount, and cooking regardless of the temperature in the refrigerator. After a lapse of a predetermined time from the start, a limit cooking time setting unit that closes the main valve V1 and the electromagnetic safety valve V2 and sets a limit cooking time Xmax for forcibly extinguishing the upper and lower burners 56 and 55, and baking of the object to be cooked. A cooking end temperature setting section for setting a baking completion temperature (cooking end temperature) Tf for judging the rise, and a remaining time for displaying the remaining cooking time until the end of cooking on the display section 384. And a physical time control unit.

  In addition, the remaining cooking time control unit obtains an initial remaining cooking time calculation unit that calculates an initial remaining cooking time based on the minimum required time Xmin and the limit cooking time Xmax, and obtains a temperature gradient of the internal temperature for each predetermined unit time. And a middle-term remaining cooking time calculation unit that calculates a middle-term remaining cooking time from a time necessary to raise the inside temperature from the current inside temperature to the baking completion temperature Tf based on the acquired temperature gradient of the inside temperature. A correction unit that corrects the middle remaining cooking time based on the temperature difference when the temperature difference between the baking completion temperature Tf and the current internal temperature is equal to or higher than a predetermined determination temperature; It has a comparing unit that compares the middle remaining cooking time and a comparing unit that compares the middle remaining cooking time with a predetermined lower remaining cooking time and an upper remaining cooking time.

  Table 1 below is an example of a data table of each set value set according to the type of cooking, the type of the object to be cooked, the cooking condition of the baking condition, and the initial internal temperature, and is stored in the memory of the microcomputer. Is stored. These setting values are obtained in advance by experiments. Each set value is appropriately set according to the size of the grill storage 2 and the capabilities of the upper and lower burners 56 and 55. In addition, each set value is similarly set also in other types of objects to be cooked, baking conditions, and other cooking modes.

  Table 1 above is a data table in a case where “grate net cooking mode” is selected as the cooking mode, “shame grill” is selected as the type of the object to be cooked, and “standard” is selected as the baking condition. In Table 1, each set value is set to a different set value between the first cooking and the second and subsequent cooking when cooking is repeated. Specifically, in the column of “Lo mode” (at the time of first cooking), each set value set when the inside temperature at the time of starting cooking detected by the first temperature sensor 14a is less than 100 ° C. is written. Have been. In the column of “Hi mode” (at the time of the second or subsequent cooking), each set value set when the internal temperature at the start of cooking is 100 ° C. or more is written. The initial temperature T0 is appropriately set according to the combustion capacity of the upper and lower burners 56 and 55, the type of the object to be cooked, and the like.

  The minimum required time Xmin is the time required to substantially bake the expected minimum cooking amount of the object to be cooked according to the type of the selected object to be cooked. Except when the upper and lower burners 56 and 55 are not forcibly extinguished before, this is the time for which the upper and lower burners 56 and 55 are forcibly continued burning from the start of cooking.

  The limit cooking time Xmax is a time for forcibly extinguishing the upper and lower burners 56 and 55 regardless of the inside temperature when a certain cooking time has elapsed after the minimum required time Xmin has elapsed.

  The baking completion temperature Tf is a determination temperature for extinguishing the upper and lower burners 56 and 55 when the internal temperature reaches the baking completion temperature Tf after the minimum required time Xmin has elapsed and before the limit cooking time Xmax has elapsed. Is one of the judgment factors. In this way, if the upper and lower burners 56 and 55 continue to burn after the minimum required time Xmin has elapsed, the upper and lower burners 56 and 55 are extinguished at the baking completion temperature Tf, thereby exceeding the allowable range for cooking. It is possible to prevent the food from being baked.

  The determination time Xa is a time for setting a middle-term determination time before the minimum required time Xmin for starting the calculation of the remaining medium-term cooking time, and the determination temperature Tj determines whether to correct the middle-term remaining cooking time. This is the temperature difference between the baking completion temperature Tf and the internal temperature. The upper limit and lower limit remaining cooking times tmax and tmin are times displayed instead of the middle remaining cooking time when the middle remaining cooking time is different from the actual remaining cooking time. The residual heat time Xr is a time set for cooking the object to be cooked in the grill storage 2 with residual heat after extinguishing the upper and lower burners 56 and 55.

  5 to 7 are flowcharts showing an example of a control operation when the grill cooking mode is selected in the gas stove according to the present embodiment, and FIG. 8 is a gas stove according to the present embodiment. FIG. 7 is a correlation diagram showing a relationship between cooking time when cooking is performed with “standard” baking, cooking temperature detected by a first temperature sensor 14a, and remaining cooking time. In FIG. 8, for the description of the remaining cooking time, the temperature change of the internal temperature when cooking is performed up to the limit cooking time Xmax, which is the upper limit of the cooking time, is shown. When the internal temperature reaches the baking completion temperature Tf, the cooking is completed before the limit cooking time Xmax.

  First, the auto menu switch 381 accepts, for example, selection of a grilled cooking mode, the fish selection is selected by the cooking selection switch 382, the grilling condition is set by the baking condition selection switch 383, and the grill switch 37 is turned on. Then, the upper and lower burners 56 and 55 are ignited, and heating is started with a predetermined initial heating power (steps ST1 to ST4).

  When the heating is started, the timer is started, and the initial temperature T0, which is the internal temperature at the time of starting the cooking, is taken in. The minimum required time Xmin, the limit cooking time Xmax, the baking completion temperature Tf according to the initial temperature T0, Each set value of the determination time Xa, the determination temperature Tj, the upper limit remaining cooking time tmax, the lower limit remaining cooking time tmin, and the remaining heat time Xr is read (steps ST5 to ST6).

Next, based on the minimum required time Xmin and the limit cooking time Xmax, an initial remaining cooking time ts is calculated from the following equation (1) and displayed on the display unit 384 (steps ST7 to ST8).
ts = {(Xmin + Xmax) / 2} + Xr (1)

  When the baking completion temperature Tf for determining the end of cooking based on the temperature in the refrigerator is set, the remaining cooking time cannot be determined at the beginning of cooking. However, in the gas stove of the present embodiment, the minimum required time which is the lower limit cooking time is used. Since Xmin, the upper limit cooking time Xmax, which is the upper limit cooking time, and the remaining heat time Xr after extinguishing the upper and lower burners 56 and 55 are set, the remaining heat time is added to the intermediate time between the lower limit and the upper limit cooking time. Assuming that the time is the initial remaining cooking time ts, the difference between the initial remaining cooking time ts and the actual remaining cooking time can be reduced even if the cooking end time at which the internal temperature reaches the baking completion temperature Tf fluctuates. Although not shown, in the present embodiment, when the value calculated including the above equation (1) is not an integer, the time after rounding up the decimal point is displayed as the remaining cooking time.

  When the initial remaining cooking time ts is calculated as described above, the initial remaining cooking time ts is subtracted by a predetermined value until the middle-term determination time (Xmin-Xa) that is a predetermined time Xa before the minimum required time Xmin comes. It is subtracted every time a (for example, one minute) and displayed on the display unit 384 (steps ST9 to ST10).

Then, the medium-term determination time arrives, the predetermined time period represented by the following formula (2) (e.g., 1 minute) to start obtaining the temperature gradient Q of-compartment temperature T _i of each.
_{Q = (T i -T i-} 1) / (t i -t i-1) (2)

As shown in FIG. 8, as the cooking time of the object to be cooked progresses and the degree of the rise in the internal temperature decreases as the minimum required time Xmin approaches, the temperature gradient Q of the internal temperature also decreases, and the internal temperature decreases. Temperature changes close to a linear curve. Therefore, as shown in the following equation (3), the temperature difference (Tf−T _i ) between the baking completion temperature Tf and the current inside temperature T _i and the current inside temperature T _i are calculated as the baking completion temperature Tf. The relationship with the time required to raise the temperature (hereinafter, referred to as “time required for temperature increase”) tr is substantially proportional to the current temperature gradient Q.
(Tf−T _i ) / tr = Q (3)
Therefore, temperature rise required time tr required to raise the complete temperature Tf baking the current internal temperature T _i can be calculated from the following equation (4) (step ST11).
tr = (Tf−T _i ) / (T _i −T _i−1 ) (4)
Then, in the gas stove of the present embodiment, since the residual heat time Xr is set, metaphase remaining cooking time t _m is represented by the following formula (5) (step ST12).
_{t m = tr + Xr (5} )

In addition, for example, when the object to be cooked or the amount of the object to be cooked is large, the cooking of the object to be cooked does not proceed sufficiently before the minimum required time Xmin elapses, and the baking completion temperature Tf and the current inside temperature T _i. , The temperature difference (Tf−T _i ) increases. In such cases, calculating the temperature rise required time tr required to raise up completion temperature Tf baking the current internal temperature T _i based on the temperature gradient Q, it may become shorter than the actual remaining cooking time There is. For this reason, in the present embodiment, if the temperature difference (Tf−T _i ) for calculating the required temperature rise time tr is larger than the predetermined determination temperature Tj, the following will be performed based on the temperature difference (Tf−T _i ). of calculating the correction value y by the equation (6), corrects the mid-term residual cooking time _{t m} already described (step ST13～ST14). Thus, it is possible to display the approximate the actual remaining cooking time period as the mid-term remaining cooking time t _m.
y = 0.1 (Tf−T _i ) −5 (6)
Here, Tf−T _i > Tj.

Note that equation (6) for correcting the formula (3) or medium-term remaining cooking time t _m for calculating the Atsushi Nobori required time tr to calculate the medium-term remaining cooking time t _m, respectively, are identified by a predetermined linear function However, these may be calculated using a different linear function or a quadratic function so as to approximate the actual remaining cooking time according to the temperature characteristics of the internal temperature.

Since it is possible to calculate the medium-term remaining cooking time t _m based on the temperature gradient Q of the internal temperature in the above manner, the inside temperature is varying with the progress of the cooking of the food, the cold storage to get every predetermined time also vary inner temperature: Q of, in some cases the current mid-term remaining cooking time t _m is greater than the previous mid-term remaining cooking time t _m-1. As a result, there is a possibility that the remaining cooking time, which is subtracted and displayed, increases with the passage of time. Thus, (at step ST15, Yes) if the current mid-term remaining cooking time _{t m} is greater than the previous mid-term remaining cooking time _{t m-1,} the display unit 384 of the previous mid-term remaining cooking time _{t m-1} (Step ST16). This can prevent the user from feeling uncomfortable.

(In step ST15, No) if the current mid-term remaining cooking time _{t m} is the last metaphase remaining cooking time _{t m-1} or less, medium remaining cooking time _{t m} is either a predetermined upper limit remaining cooking time tmax or Alternatively, it is further determined whether or not the time is equal to or shorter than a predetermined lower limit remaining cooking time tmin (steps ST17 and ST19). That is, since the inside temperature is varying with the progress of the cooking of the food, medium remaining cooking time t _m is greater than the time from the current cooking time t _i up to the limit cooking time Xmax is the upper limit cooking time If, or conversely metaphase remaining cooking time t _m is sometimes very small. Therefore, in this embodiment, when the medium-term remaining cooking time t _m is the predetermined upper limit remaining cooking time tmax or more (in step ST17, Yes), in place of the medium-term remaining cooking time t _m, the upper limit for each predetermined time The remaining cooking time tmax is displayed on the display unit 384 (step ST18). Also, if the medium term remaining cooking time _{t m} is the predetermined lower limit remaining cooking time tmin (in step ST19, Yes), in place of the medium-term remaining cooking time _{t m,} the display unit a lower limit remaining cooking time tmin at predetermined time intervals 384 (step ST20). The greater than metaphase remaining cooking time _{t m} is the lower limit remaining cooking time tmin, (at step ST17 and ST19, No) smaller than the upper limit remaining cooking time tmax, the display unit metaphase remaining cooking time _{t m} at predetermined time intervals 384 (Step ST21). Thus, the actual remaining cooking time and divergence metaphase remaining cooking time t _m can be prevented from being displayed. Note that the upper and lower limit cooking times tmax and tmin are appropriately set according to the minimum required time Xmin and the limit cooking time Xmax.

As described above, if there is no abnormality such as an error, to the limit cooking time Xmax arrives, based on the temperature gradient Q of inside temperature, medium remaining cooking time t _m and the like are displayed on the display unit 384. Also, the internal temperature rises to the baking completion temperature Tf before the limit cooking time Xmax arrives, or the internal temperature does not rise to the baking completion temperature Tf, but when the limit cooking time Xmax arrives, the upper and lower burners Fires 56 and 55 are extinguished, and in any case, the remaining heat cooking is continued for a predetermined remaining heat time Xr (steps ST22 to ST24).

  When the residual heat cooking is started, the display unit of the display unit 384 is switched in seconds, and the residual heat time Xr is subtracted for each predetermined subtraction time b (for example, one second) and displayed on the display unit 384 (step ST26). To ST27). When the remaining heat cooking is completed, the end of cooking is notified from the display unit 384 or a speaker (not shown).

As described above, according to this embodiment, the cooking start to completion of cooking, since actual initial remaining cooking time approximates the remaining cooking time ts and metaphase remaining cooking time t _m and the like are displayed on the display unit 384 In addition, the user does not feel discomfort with the displayed remaining cooking time, and the user can work with a good timing in accordance with the displayed remaining cooking time. Therefore, according to the present embodiment, it is possible to provide a gas stove excellent in user-friendliness.

(Other embodiments)
(1) In the above embodiment, a heating cooker provided with a grill storage having a gas burner is used as the heating means, but a heating cooker having an electric heater as the heating means may be used.
(2) In the above-described embodiment, the minimum required time Xmin is used as the base point, and the medium-term remaining cooking time is displayed from the medium-term determination time that is a predetermined time before the minimum required time Xmin, but the limit cooking time Xmax is used as the base point. After the minimum required time Xmin has elapsed, when the predetermined end determination time comes before the limit cooking time Xmax, the temperature gradient of the internal temperature is similarly obtained, and based on the obtained temperature gradient of the internal temperature, The remaining cooking time at the end may be calculated from the time required to raise the internal temperature to the cooking end temperature Tf and displayed on the display unit. According to this, even when the amount of the large object to be cooked or the large amount of the object to be cooked is large, the final remaining cooking time according to the degree of temperature increase of the internal temperature that varies depending on the object to be cooked and the heating conditions and the cooking end temperature Tf. Can be accurately displayed on the display unit.
(3) In the above-described embodiment, the baking completion temperature is set as the cooking end temperature Tf. However, if the baking completion temperature can be determined, for example, the baking condition is set to the reference temperature Tmin when the minimum required time Xmin has elapsed. The temperature (Tmin + △ T0) obtained by adding the rise temperature for finish baking ΔT0 set in accordance with the above may be set as the cooking end temperature Tf. In addition, a predetermined limit cooking temperature set between the lapse of the minimum required time Xmin and the limit cooking time Xmax may be set as the cooking end temperature Tf. Furthermore, different cooking end temperatures Tf may be set according to the cooking time.
(4) In the above embodiment, the remaining heat time is provided before the end of cooking, but the cooking may be terminated without providing the remaining heat time. In this case, the time required to raise the current internal temperature calculated based on the temperature gradient of the internal temperature to the cooking end temperature Tf is displayed on the display unit as the remaining intermediate cooking time or the final remaining cooking time. .

2 Grill storage 14a 1st temperature sensor (inside storage temperature detector)
55 Lower fire burner 56 Upper fire burner 384 Display

Claims (5)

A heating cabinet,
Heating means for heating the heating chamber,
An internal temperature detection unit for detecting an internal temperature in the heating oven,
A display unit for displaying the remaining cooking time,
A minimum required time setting unit that sets a minimum required time Xmin required to substantially bake a subject having an expected minimum cooking amount;
A limit cooking time setting unit that sets a limit cooking time Xmax for forcibly stopping the heating of the heating means regardless of the internal temperature when a certain time has elapsed from the start of cooking;
A cooking end temperature setting unit that sets a cooking end temperature Tf for determining baking of the object to be cooked based on the temperature in the refrigerator;
A remaining cooking time control unit that displays the remaining cooking time on the display unit,
The remaining cooking time control unit obtains the temperature gradient of the internal temperature when the predetermined medium-term determination time is earlier than the minimum required time Xmin, and determines the current internal temperature based on the acquired temperature gradient of the internal temperature. A heating cooker that calculates the remaining cooking time in the middle period from the time required to raise the temperature to the cooking end temperature Tf, and displays the remaining cooking time on the display unit. A heating cabinet,
Heating means for heating the heating chamber,
An internal temperature detection unit for detecting an internal temperature in the heating oven,
A display unit for displaying the remaining cooking time,
A minimum required time setting unit that sets a minimum required time Xmin required to substantially bake a subject having an expected minimum cooking amount;
A limit cooking time setting unit that sets a limit cooking time Xmax for forcibly stopping the heating of the heating means regardless of the internal temperature when a certain time has elapsed from the start of cooking;
A cooking end temperature setting unit that sets a cooking end temperature Tf for determining baking of the object to be cooked based on the temperature in the refrigerator;
A remaining cooking time control unit that displays the remaining cooking time on the display unit,
After the minimum required time Xmin has elapsed, the remaining cooking time control unit obtains the temperature gradient of the internal temperature when the predetermined end determination time comes before the limit cooking time Xmax, and based on the acquired temperature gradient of the internal temperature. A heating cooker that calculates a remaining cooking time at the end from a time required to raise the current internal temperature to the cooking end temperature Tf and displays the remaining cooking time on the display unit. The cooking device according to claim 1 or 2 ,
The remaining cooking time control unit, when the temperature difference between the cooking end temperature Tf and the current inside temperature is larger than the predetermined determination temperature, corrects the middle remaining cooking time or the last remaining cooking time with a predetermined correction value, Cooking device to be displayed on the display. The cooking device according to any one of claims 1 to 3 ,
The remaining cooking time control unit displays the previous middle remaining cooking time or the last remaining cooking time when the current middle remaining cooking time or the last remaining cooking time is larger than the previous middle remaining cooking time or the last remaining cooking time. Heating cooker to be displayed on the section. The cooking device according to any one of claims 1 to 4 ,
When the remaining cooking time control unit is the middle remaining cooking time or the last remaining cooking time is equal to or less than a predetermined lower limit remaining cooking time or is equal to or longer than a predetermined upper limit remaining cooking time, the remaining remaining cooking time or the last remaining cooking time is set to the middle remaining cooking time or the last remaining cooking time. Instead, a heating cooker that displays the lower limit remaining cooking time or the upper limit remaining cooking time on the display unit.

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