JP2019184120A - Gas cooking stove - Google Patents

Abstract

To provide a structure in a gas cooking stove enabling automatic cooking, which facilitates excellently heating the inside of a grill chamber while suppressing excessive burnt deposits on the surface even when an initial temperature of the grill chamber is high.SOLUTION: In a gas cooking stove 1, a cooking control part keeps at a prescribed timing the fire power of a grill burner 10 in a first fire power state, when a temperature detected by a temperature sensor 63 at an initial stage of cooking in an automatic cooking mode is less than a prescribed threshold temperature, or a lapse time from the fire extinction of the grill burner 10 exceeds a fixed time, and keeps at a prescribed timing the fire power of the grill burner 10 in a second fire power state suppressed than the first fire power state, when a temperature detected by the temperature sensor 63 at an initial stage of cooking in an automatic cooking mode is equal to or more than the threshold temperature, or a lapse time from the fire extinction of the grill burner 10 is equal to or less than the fixed time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas stove.

  2. Description of the Related Art Conventionally, there is known a gas stove with a grill that heats and cooks an object to be cooked accommodated in a grill cabinet with a grill burner. This type of gas stove with a grill is equipped with a temperature sensor that detects the temperature in the grill cabinet, and when the temperature in the grill cabinet reaches a predetermined cut temperature, the grill burner is automatically extinguished. Has been.

Japanese Patent Laid-Open No. 2002-22158

  However, in this type of gas stove, since the cut temperature is set assuming that the inside of the grill is at a certain low temperature (for example, normal temperature) at the start of cooking, the temperature inside the grill is high at the start of cooking. Then, the time until the cut temperature is reached is shortened. When such a situation occurs, automatic cooking ends without the inside of the cooking object being sufficiently heated, so that problems such as raw burning tend to occur.

  As a technique related to this problem, a technique has been proposed in which the cooking time is adjusted by setting the fire extinguishing temperature based on the temperature in the grill cabinet at the start of cooking (see, for example, Patent Document 1). However, since the technique of Patent Document 1 is only capable of setting the cut temperature (cut control temperature) high when the initial temperature in the grill cabinet is high, it has a strong heating power when the initial temperature is high. If it is set, the surface of the cooking object will be heated too much, and problems such as scorching will easily occur.

  The present invention has been made to solve at least one of the above-described problems. After the grill burner is ignited, the fire is automatically extinguished in response to the temperature in the grill cabinet reaching the cut temperature. An object of the present invention is to provide a gas stove capable of performing automatic cooking, which can suppress excessive burning of the surface of a cooking object during automatic cooking even when the initial temperature in the grill is high.

The gas stove which is one of the present invention is
A grill that houses objects to be cooked;
A grill burner for heating the cooking object accommodated in the grill cabinet;
A temperature sensor for detecting the temperature in the grill or the temperature of exhaust from the grill; and
An operation unit for instructing the start of cooking in the automatic cooking mode;
An ignition control unit for igniting the grill burner when the operation unit instructs to start cooking in the automatic cooking mode;
When the operation unit is instructed to start cooking in the automatic cooking mode, and the temperature detected by the temperature sensor reaches a cut-off temperature, the cooking control unit that switches the grill burner to a fire extinguishing state;
Have
The cooking control unit
When the temperature detected by the temperature sensor is lower than a predetermined threshold temperature at the initial stage of cooking in the automatic cooking mode, or when the elapsed time from the previous fire extinguishing of the grill burner exceeds a predetermined time, the predetermined time is reached. Maintaining the thermal power of the grill burner in the first thermal power state;
In the initial stage of cooking in the automatic cooking mode, when the temperature detected by the temperature sensor is equal to or higher than the threshold temperature, or when the elapsed time from the previous fire extinguishing of the grill burner is equal to or less than the predetermined time, the predetermined At the time, the heating power of the grill burner is maintained in the second heating power state in which the heating power is suppressed from the first heating power state.

  In the gas stove that is one of the present invention, the cooking control unit is configured so that the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is less than a predetermined threshold temperature or the time since the previous grill burner was extinguished. When the time exceeds a certain time, the thermal power of the grill burner is maintained in the first thermal power state at a predetermined time. On the other hand, when the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, or when the elapsed time since the previous fire extinguishing of the grill burner is equal to or less than a certain time, The heating power of the grill burner is maintained in the second heating power state in which the heating power of the grill burner is lower than that in the first heating power state at a predetermined time. With such a configuration, when the temperature in the grill cabinet is relatively high or estimated to be high at the beginning of cooking in the automatic cooking mode, the normal case (the temperature in the grill cabinet is relatively high). The thermal power at a predetermined time in the automatic cooking mode can be suppressed more than the case where the automatic cooking mode is low. Therefore, while ensuring the time until the temperature in the grill chamber reaches the cut-off temperature, it is possible to prevent the occurrence of raw burning, and cooking is performed with a strong heating power when the initial temperature in the grill chamber is high. Excessive burning on the surface of the cooking object can be suppressed.

1 is a perspective view schematically illustrating a gas stove of Example 1. FIG. It is explanatory drawing which shows notionally the gas supply path etc. to each gas burner of the gas stove of Example 1. FIG. 3 is a block diagram schematically illustrating an electrical configuration of a gas stove according to Embodiment 1. FIG. FIG. 4 is an explanatory diagram illustrating the configuration of the operation unit in the gas stove according to the first embodiment. FIG. 5 is a flowchart illustrating the flow of control when performing automatic cooking in any of the automatic cooking modes in the gas stove according to the first embodiment. FIG. 6 is a graph illustrating the relationship between the heating time and the cut-off temperature when automatic cooking is performed in the grill in the gas stove according to the first embodiment.

Hereinafter, desirable examples of the present invention will be shown. However, the present invention is not limited to the following examples.
The cooking control unit is either a condition in which the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is equal to or higher than a threshold temperature, or a condition in which the elapsed time from the previous grill burner extinguishing is a predetermined time or less. When the above condition is satisfied, the cutoff temperature value may be set higher than when the condition is not satisfied.

  In this way, when the initial temperature of cooking is relatively high or is estimated to be high, the cut-off temperature is set to be relatively high, and a long time until extinction is secured. Can do. Therefore, it becomes easy to prevent the automatic cooking time from becoming too short when the initial temperature is high.

  When the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is less than the threshold temperature, or when the elapsed time since the previous grill burner extinction exceeds a certain time, the cooking control unit The cut-off temperature is set according to the first characteristic information that sets the cut-off temperature value gradually lower as time elapses, and the temperature detected by the temperature sensor at the beginning of cooking in the automatic cooking mode is the threshold temperature. Second characteristic information for setting the cut-off temperature value gradually lower as time elapses after the grill burner is in the ignition state when the time is equal to or longer than the predetermined time or less than the predetermined time. May operate to set the cutoff temperature according to Then, the second characteristic information may have a higher cutoff temperature value set according to the elapsed time than the first characteristic information.

  In this way, when the initial temperature of cooking is relatively high or is estimated to be high, the cut-off temperature is set to be relatively high, and a long time until extinction is secured. Can do. While realizing such a relative relationship, in any case, the cut-off temperature can be set lower as time elapses from the ignition of the grill burner.

<First Embodiment>
Hereinafter, a first embodiment will be described with reference to the drawings.
The gas stove 1 shown in FIG. 1 is configured as a built-in stove that can heat cooking utensils such as cooking pots. The gas stove 1 is provided with a right stove portion 4A and a left stove portion 4B, respectively, so as to be exposed from a top plate 2 (top plate) constituting the upper surface of the stove main body 1A. A small stove portion 4C is provided between 4B and rearward. Below the top plate 2, a grill box 3 is provided in the vicinity of the center inside the stove body 1A. The grill cabinet 3 is a portion that accommodates an object to be cooked and is cooked by a grill burner (gas burner 54: FIG. 2). The grill cabinet 3 can be opened and closed by a grill door 3B provided on the front surface of the stove body 1A.

  As shown in FIG. 1, gas burners 51, 52, 53, and 54 shown in FIG. 2 are provided in the right and left stove portions 4 </ b> A, 4 </ b> B, 4 </ b> C, and the grill 3, respectively. As shown in FIG. 2, a plurality of branch supply paths 61, 62, 63, 64 are connected to the plurality of gas burners 51, 52, 53, 54, respectively, and these branch supply paths 61, 62, 63, 64 are common. The structure branches off from the supply path 60. The common supply path 60 is a common gas path to the gas burners 51, 52, 53, 54, and the plurality of branch supply paths 61, 62, 63, 64 branch from the common supply path 60 and the gas burners 51, 52. , 53, 54, and a supply path arranged to guide the gas. The common supply path 60 is provided with an original electromagnetic valve N1 that opens and closes the common supply path 60. A branch supply path 61 that branches from the common supply path 60 and continues to the gas burner 51 includes an electromagnetic valve (safety valve) 51G that can open and close the branch supply path 61, a closing valve 51F that can open and close the branch supply path 61, and a gas burner 51. And a thermal power adjustment valve 51E capable of adjusting the gas supply amount to. A branch supply path 62 branched from the common supply path 60 and continuing to the gas burner 52 includes an electromagnetic valve (safety valve) 52G capable of opening and closing the branch supply path 62, a closing valve 52F capable of opening and closing the branch supply path 62, and a gas burner 52. And a heating power adjustment valve 52E capable of adjusting the gas supply amount to the. A branch supply path 63 branched from the common supply path 60 and continuing to the gas burner 53 includes an electromagnetic valve (safety valve) 53G capable of opening and closing the branch supply path 63, a closing valve 53F capable of opening and closing the branch supply path 63, and a gas burner 53. And a thermal power adjustment valve 53E capable of adjusting the gas supply amount to the.

  The gas burner 54 (grill burner) of the grill cabinet 3 is a gas burner for heating the cooking object accommodated in the grill cabinet 3, and an upper burner 54 </ b> A disposed on the upper side in the grill cabinet 3 and an upper in the grill cabinet 3. And a lower burner 54B disposed below the burner 54A. From the branch supply path 64 branched from the common supply path 60 and leading the gas to the gas burner 54, from the first supply path 65A branched from the branch supply path 64 and guided to the upper burner 54A, and from the branch supply path 64 A second supply path 65B that branches and guides gas to the lower burner 54B is connected. The branch supply path 64 is provided with an electromagnetic valve (safety valve) 54G and a stop valve 54F capable of opening and closing the branch supply path 64, and the first supply path 65A is provided with a plurality of electromagnetic valves 54H and 54J. An electromagnetic valve 54K is provided in the supply path 65B.

  As shown in FIG. 1, four rotary operation units 6A, 6B, 6C, and 6D are provided so as to correspond to the right cooker 4A, the left cooker 4B, the small cooker 4C, and the grill cabinet 3, respectively. Yes. In the example of FIG. 1, each of the rotation operation units 6A, 6B, 6C, and 6D is switched between a retracted position and a protruding position every time the user presses. As shown in the electrical configuration of FIG. 3, switches 30A, 30B, 30C, and 30D are provided so as to correspond to the rotation operation units 6A, 6B, 6C, and 6D, respectively, and the switches 30A, 30B, 30C, and 30D are provided. Are respectively provided with ignition signal input circuits 40A, 40B, 40C, and 40D. Further, displacement detectors 32A, 32B, 32C, and 32D are provided so as to correspond to the rotation operation units 6A, 6B, 6C, and 6D, respectively, and thermal power is provided so as to correspond to the displacement detectors 32A, 32B, 32C, and 32D, respectively. Signal input circuits 42A, 42B, 42C, and 42D are provided, respectively. In any of the rotation operation units 6A, 6B, 6C, and 6D, the displacement detection unit detects the displacement (rotation position) of the rotation operation unit, and the displacement detection unit detects from the thermal power signal input circuit corresponding to the displacement detection unit. A signal corresponding to the detected displacement (rotational position) is given to the control circuit 10.

  As shown in FIG. 2, a first supply path 65A is configured as a main path for guiding gas to the upper burner 54A, and the path of the electromagnetic valve 54J is bypassed so as to bypass the electromagnetic valve 54J provided in the first supply path 65A. A bypass path 66A, which is a parallel path, is provided. When the electromagnetic valve 54J is closed with the electromagnetic valve 54H open, the gas guided by the branch supply path 64 is supplied to the upper burner 54A through the bypass path 66A. When both the solenoid valves 54H and 54J are open, the gas guided by the branch supply path 64 is supplied to the upper burner 54A through the first supply path 65A or the bypass path 66A. In addition, a second supply path 65B is configured as a main path for guiding gas to the lower burner 54B, and a path parallel to the path of the electromagnetic valve 54K so as to bypass the electromagnetic valve 54K provided in the second supply path 65B. A certain bypass path 66B is provided. When the electromagnetic valve 54K is closed, the gas guided by the branch supply path 64 is supplied to the lower burner 54B through the bypass path 66B. When the electromagnetic valve 54K is open, the gas guided by the branch supply path 64 is supplied to the lower burner 54B through the second supply path 65B or the bypass path 66B. As shown in FIGS. 2 and 3, thermocouples 51C, 52C, 53C, 54C, 54D are provided adjacent to the gas burners 51, 52, 53, 54A, 54B, respectively, and the thermocouples 51C, 52C, Temperature signal input circuits 44A, 44B, 44C, 44D, and 44E are provided corresponding to 53C, 54C, and 54D, respectively. Each of the temperature signal input circuits 44A, 44B, 44C, 44D, and 44E inputs a signal corresponding to the electromotive force generated by the corresponding thermocouple to the control circuit 10. An igniter 26A, 26B, 26C, 26D is provided adjacent to each of the gas burners 51, 52, 53, 54, and igniter circuits 46A, 46B, 46C, corresponding to the igniters 26A, 26B, 26C, 26D, respectively. 46D is provided. For example, an igniter 26D is provided corresponding to the gas burner 54, and the igniter circuit 46D drives the igniter 26D in response to an external ignition operation (an ignition operation of the switch 30D) with respect to the rotation operation unit 6D, and sparks are generated by the igniter 26D. The gas burner 54 is ignited by discharging.

  The thermistor 16 corresponds to an example of a temperature sensor, and detects the temperature inside the grill cabinet 3 or the exhaust path through which the exhaust from the grill cabinet 3 flows. The thermistor 16 is arranged at a predetermined position in the exhaust chamber that leads to the outside from the grill cabinet 3 or the grill cabinet 3, and generates a detection value corresponding to the temperature at the position where the thermistor 16 is installed. A thermistor input circuit (not shown) is provided between the control circuit 10 and the thermistor 16, and the thermistor input circuit is a voltage signal (for example, the detected value itself or the detected value) corresponding to the detected value generated by the thermistor 16. An amplified signal obtained by amplifying the signal is supplied to the control circuit 10.

  The operation panel 18 is configured as an operation panel having a plurality of buttons, and is a part that can perform an operation for instructing the start of cooking in the automatic cooking mode.

  The control circuit 10 is configured as a microcomputer, for example, and includes a CPU 10A, a ROM 10B, a RAM 10C, and the like as shown in FIG. 3, and further includes a timer, an I / O interface, and the like (not shown). Although not shown, a nonvolatile memory may be provided inside or outside the control circuit 10. The control circuit 10 includes the above-described solenoid valves (not shown in FIG. 3), igniters 26A, 26B, 26C, and 26D, a plurality of display devices 21, 22, 23, 24, a buzzer device 12, an audio device 14, and the like. It can be controlled. As shown in FIG. 1, the display devices 21, 22, 23, and 24 are provided corresponding to the rotation operation units 6 </ b> A, 6 </ b> B, 6 </ b> C, and 6 </ b> D, respectively. The buzzer device 12 is configured as a known buzzer device such as a piezoelectric buzzer device. The sound device 14 is a device that emits sound such as a melody or a message. For example, the sound device 14 includes a speaker or a drive circuit that gives a sound signal to the speaker, and operates to emit sound corresponding to an instruction from the control circuit 10. To do. Further, a power supply circuit 48 is provided so as to supply electric power to various electric components including the above-described electric components. The power supply circuit 48 has a function of receiving a power supply from the two dry batteries 49 accommodated in the battery box and generating a predetermined power supply voltage. The power supply voltage generated by the power supply circuit 48 passes through a path (not shown). To be supplied to various electrical components.

Next, the cooking mode of the gas stove 1 will be described.
In the gas stove 1, a plurality of types of cooking modes can be set in the grill 3. The plurality of types of cooking modes include at least a “normal mode” and an “automatic cooking mode (auto mode)”, and the “automatic cooking mode” includes “toast mode”, “dried fish mode”, “ Includes "fillet mode" and "appearance mode". The normal mode is a mode in which such an automatic cooking mode (“toast mode”, “dried fish mode”, “fillet mode”, “appearance mode”) is not performed.

  In the gas stove 1, the mode can be switched by operating the operation unit (operation panel) 18 shown in FIG. 4 when the power source of the gas stove 1 is turned on. Specifically, when the mode selection switch 18A is pressed in the power-on state, the mode setting state is switched. For example, when the mode selection switch 18A is pressed in the “normal mode”, the mode is switched to the “toast mode”. After that, every time the mode selection switch 18A is pressed, the “dried fish mode”, “fillet mode”, “figuration mode” Switch to When the mode selection switch 18A is pressed in the “appearance mode”, the mode returns to the “normal mode” again. It should be noted that mode setting information that can specify which mode is set is stored in a memory or the like.

  When the “toast mode” is set, the control circuit 10 controls to turn on the lamp 19A disposed adjacent to the character display indicating the toast mode (“toast” character). The lamps 19B, 19C, and 19D are not lit. Similarly, when the “dried fish mode” is set, the control circuit 10 controls to turn on the lamp 19B arranged adjacent to the character display indicating the dried fish mode (the character “dried fish”). When the “filler mode” is set, the control circuit 10 controls to turn on the lamp 19C arranged adjacent to the character display indicating the fillet mode (the character “fillet”). Is set by the control circuit 10 to turn on the lamp 19D arranged adjacently in the character display indicating the appearance firing mode (letter of “appearance firing”). When the normal mode is set, none of the lamps 19A to 19D is lit.

  In the gas stove 1 shown in FIG. 1 and the like, when a predetermined start condition is satisfied when the power source of the gas stove 1 is turned on (when operating power is supplied from the power supply circuit to each component), the control circuit The automatic cooking control shown in FIG. The predetermined start condition is, for example, that an ignition instruction operation is performed on the rotation operation unit 6D when any one of ““ toast mode ”,“ dried fish mode ”,“ fillet mode ”, and“ appearance mode ”is set. This is the condition.

  In this configuration, the operation panel 18 and the rotation operation unit 6D correspond to an example of the operation unit. Specifically, “when the operation unit instructs the start of cooking in the automatic cooking mode” means “to the operation panel 18 by the user with respect to the“ toast mode ”,“ dried fish mode ”,“ fillet mode ”,“ appearance grilling mode ” "When the user performs an operation to set any one of them, and the ignition operation is performed on the rotation operation unit 6D by the user in the state set to any one of them". The control circuit 10 and the igniter circuit 46D correspond to an example of an ignition control unit. When the operation unit (the operation panel 18 and the rotation operation unit 6D) instructs to start cooking in the automatic cooking mode, the gas burner 54 (grill burner) Control to ignite. Furthermore, the control circuit 10 corresponds to an example of a cooking control unit, and the start of cooking in the automatic cooking mode is instructed by the operation unit (the operation panel 18 and the rotation operation unit 6D), and is detected by the temperature sensor (thermistor 16). When the temperature reaches the cut-off temperature, the gas burner 54 (grill burner) is operated to be switched to the fire extinguishing state.

  When the cooking control of FIG. 5 is started, the control circuit 10 first ignites the gas burner 54 (grill burner) (step S1), and measures the elapsed time from the start of ignition of the timer (gas burner 54 (grill burner)). The timer is operated, and measurement of the elapsed time after the ignition of the gas burner 54 (grill burner) is started (step S2). It is desirable that the gas burner 54 (grill burner) is ignited with strong heating power in both the upper burner 54A and the lower burner 54B.

  After step S2, the control circuit 10 determines whether or not a predetermined thermal power suppression condition is satisfied. Specifically, it is determined whether the temperature detected by the thermistor 16 (temperature sensor) at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature Tth, and the temperature detected by the thermistor 16 (temperature sensor). Is lower than the threshold temperature Tth, the heating power of the gas burner 54 (grill burner) is set to the first heating power state in step S4, and if the temperature detected by the thermistor 16 (temperature sensor) is equal to or higher than the threshold temperature Tth, the process proceeds to step S5. Then, the thermal power of the gas burner 54 (grill burner) is set to the second thermal power state. Note that “the initial stage of cooking in the automatic cooking mode” here can be, for example, a period within a certain time (for example, 30 seconds) after the gas burner 54 is ignited in step S1, and the threshold temperature is set in step S3. The temperature to be compared with Tth (the temperature corresponding to the “temperature detected by the temperature sensor at the beginning of cooking in the automatic cooking mode”) is the detected temperature of the thermistor 16 (temperature sensor) sampled once within this fixed time. It may be a value based on the detected temperature of the thermistor 16 (temperature sensor) sampled a plurality of times within this fixed time (for example, an average value or a maximum value).

  In the first thermal power state, for example, the thermal power of the upper burner 54A is high thermal power (thermal power when the electromagnetic valve 54J is open), and the thermal power of the lower burner 54B is high thermal power (thermal power when the electromagnetic valve 54K is open). State. The second thermal power state is a state in which the thermal power of the upper burner 54A is weak thermal power (thermal power with the electromagnetic valve 54J closed) and the thermal power of the lower burner 54B is strong thermal power (thermal power with the electromagnetic valve 54K opened). is there. In the case where the second thermal power state is set in step S5, for example, the second thermal power state may be switched after a predetermined time has elapsed from the ignition of the gas burner 54.

  As described above, the control circuit 10 corresponding to the cooking control unit determines the predetermined value when the temperature detected by the thermistor 16 (temperature sensor) at “the initial stage of cooking in the automatic cooking mode” is lower than the predetermined threshold temperature Tth. During the period (for example, until the temperature of the thermistor 16 reaches the cutoff temperature), the thermal power of the gas burner 54 (grill burner) is maintained in the first thermal power state, and the thermistor 16 (in the initial stage of cooking in the automatic cooking mode) When the temperature detected by the temperature sensor is equal to or higher than a predetermined threshold temperature Tth, the thermal power of the gas burner 54 (grill burner) is maintained in the second thermal power state, which is suppressed from the first thermal power state at the predetermined time. Yes.

  After step S4 or step S5, the control circuit 10 acquires burn-in / down information (step S6). In the gas stove 1, when the power supply is in an on state, it is possible to switch between heating and reducing by operating the operation panel 18 shown in FIG. Specifically, when the heating / discharging selection switch 18B is pressed in the power-on state, the setting state for heating / discharging is switched. For example, when the heating mode selection switch 18B is pressed in the “standard mode”, the mode is switched to the “strong mode”, and thereafter, every time the heating mode selection switch 18B is pressed, the “weak mode”, “standard mode”, “strong mode”. "... in turn. If it is set to “Strong Mode”, the setting information indicating that it is set to “Strong Mode” is set to “Standard Mode” if it is set to “Standard Mode”. If the setting adjustment information indicating “weak mode” is set, the correction setting information indicating that “weak mode” is set is stored in the memory or the like. Such mode setting (setting of baking) may be performed before the start of cooking control shown in FIG. 5, or may be performed after the start of cooking control shown in FIG. When executing the process of step S6, the control circuit 10 refers to, for example, a memory, and confirms which mode the burn-in / out setting information indicates.

  The control circuit 10 calculates a cutoff temperature after step S6 (step S7). The cut-off temperature is a threshold temperature for cut-off for comparison with the detected temperature grasped by the detected value of the thermistor 16. The cutoff temperature is determined based on, for example, a predetermined arithmetic expression (for example, a primary expression using the elapsed time and the temperature of the thermistor 16 as variables), and in this configuration, the gas burner 54 (grill burner) is in an ignition state. The cut-off temperature is set lower as time passes.

  For example, in the case where the first thermal power state is set in step S4, when the cutoff temperature is Y and the elapsed time after the gas burner 54 (grill burner) is in the ignition state is X, the control circuit 10 When the “strong mode” is set in this type of automatic cooking mode (for example, “toast mode”), the cutoff temperature (threshold temperature) Y is calculated by the equation of Y = A × X + B, When the “standard mode” is set in the type of automatic cooking mode, the cut-off temperature (threshold temperature) Y is calculated by the equation Y = A × X + C. ”Is set, the cut-off temperature (threshold temperature) Y is calculated by the equation Y = A × X + D. The values of B, C, and D are all positive fixed values (constants), and B> C> D. The value A is a negative fixed value (constant). The relationship between the equations is also shown in FIG. FIG. 6 shows an example when the standard mode is set, and the expression in the strong mode (Y = A × X + B) and the expression in the weak mode (Y = A × X + D) are two. It is shown virtually by a dotted line. In step S7, the arithmetic expressions corresponding to the current setting mode (execution time of step S7) of “strong mode”, “standard mode”, and “weak mode” are expressed as Y = A × X + B, Y = A × X + C, Y = Select from A × X + D. Then, a cutoff temperature (threshold temperature) Y is calculated with X being the count value of the timer (elapsed time from step S2) at the present time (the time when step S7 is executed).

  On the other hand, when the second thermal power state is set in step S5, the cutoff temperature is set higher in step S7 than when the first thermal power state is set. Specifically, when the “strong mode” is set, the cutoff temperature (threshold temperature) Y is calculated by the equation Y = A × X + B + α, and when the “standard mode” is set. Calculates the cut-off temperature (threshold temperature) Y by the equation Y = A × X + C + β, and when “weak mode” is set, the cut-off temperature (threshold value) by the equation Y = A × X + D + γ Temperature) Y is calculated. α, β, and γ are positive values, and may be the same value or different.

  It should be noted that the cut-off temperature can be determined by the same method except that the coefficients are different even in other types of automatic cooking modes ("dried fish mode", "fillet mode", "appearance grilling mode"). When the cut-off temperature is set to Y and the elapsed time after the gas burner 54 (grill burner) is in the ignition state is set to X when the one-fired power state is set, the control circuit 10 is, for example, in the “dry matter mode”) When the “strong mode” is set, the cutoff temperature (threshold temperature) Y is calculated by the equation Y = M × X + N, and the “dry mode” is set to the “standard mode”. In this case, the cut-off temperature (threshold temperature) Y is calculated by the equation Y = M × X + P, and when the “dry mode” is set to the “weak mode”, the equation Y = M × X + Q At Cutoff temperature (threshold temperature) is calculated Y. The values of N, P, and Q are all positive fixed values (constants), and N> P> Q. In this case, in step S7, Y = M × X + N, Y = M × X + P, which is an equation corresponding to the current setting mode (at the time of execution of step S7) of “strong mode”, “standard mode”, and “weak mode”. , Y = M × X + Q. Then, a cutoff temperature (threshold temperature) Y is calculated with X being the count value of the timer (elapsed time from step S2) at the present time (the time when step S7 is executed).

  Even in such an example, when the second thermal power state is set in step S5, the cutoff temperature is set higher in step S7 than when the first thermal power state is set. Specifically, when the “strong mode” is set, the cutoff temperature (threshold temperature) Y is calculated by the equation Y = M × X + N + α, and when the “standard mode” is set. Calculates the cut-off temperature (threshold temperature) Y using the equation Y = M × X + P + β, and when the “weakening mode” is set, the cut-off temperature (threshold value) is calculated using the equation Y = M × X + Q + γ. Temperature) Y is calculated. α, β, and γ are positive values, and may be the same value or different.

  After step S7, the control circuit 10 acquires the detected temperature T of the position of the thermistor 16 (in the grill box 3 or in the exhaust passage from the grill box 3) based on the detected value of the thermistor 16 (step S8). . Then, the detected temperature T acquired in step S8 is compared with the cut-off temperature (threshold temperature) Y calculated in step S7, and it is determined whether or not the detected temperature T has reached the cut-off temperature (threshold temperature) Y. (Step S9). If the control circuit 10 determines in step S9 that the detected temperature T is lower than the cut-off temperature (threshold temperature) Y, the control circuit 10 returns the process to step S6 and performs the processes subsequent to step S6 again. If the control circuit 10 determines in step S9 that the detected temperature T is equal to or higher than the cutoff temperature (threshold temperature) Y, the control circuit 10 proceeds to step S10, extinguishes the gas burner 54 (grill burner), and in step S11, Notify the end of automatic cooking.

  In step S3 described above, whether or not the temperature detected by the thermistor 16 (temperature sensor) at the initial stage of cooking in the automatic cooking mode (specifically, at the time of step S3) is equal to or higher than the threshold temperature Tth. It is determined, but at the time of step S3, it is determined whether or not the time elapsed since the last extinguishing of the gas burner 54 (grill burner) is a certain time or less. If it is less than the certain time, the gas burner 54 is determined in step S5. (Grill burner) is set to the second thermal power state, and when the predetermined time is exceeded, the gas burner 54 (grill burner) may be set to the first thermal power state in step S4.

Next, the main effect of this structure is illustrated.
In the gas stove 1, the control circuit 10 corresponding to an example of the cooking control unit operates when the temperature detected by the thermistor 16 (temperature sensor) at the initial stage of cooking in the automatic cooking mode is lower than a predetermined threshold temperature or the previous grill burner. When the elapsed time from the fire extinguishing exceeds a certain time, the thermal power of the grill burner is maintained in the first thermal power state at a predetermined time. On the other hand, when the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, the control circuit 10 (cooking control unit) or the elapsed time from the previous extinguishing of the grill burner is less than a certain time. If this is the case, the thermal power of the grill burner is maintained in a second thermal power state that is lower than the first thermal power state at a predetermined time. With such a configuration, when the temperature in the grill cabinet is relatively high or estimated to be high at the beginning of cooking in the automatic cooking mode, the normal case (the temperature in the grill cabinet is relatively high). The thermal power at a predetermined time in the automatic cooking mode can be suppressed more than the case where the automatic cooking mode is low. Therefore, while ensuring the time until the temperature in the grill cabinet 3 reaches the cut-off temperature, it is possible to prevent raw burning, and cooking is performed with a strong heating power when the initial temperature in the grill cabinet 3 is high. The excessive burning of the cooking target surface resulting from it can be suppressed.

  The control circuit 10 (cooking control unit) determines that the temperature detected by the thermistor 16 (temperature sensor) at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, or the time elapsed since the previous fire extinguishing of the grill burner. When any of the following conditions is satisfied, the cutoff temperature is set higher than when the condition is not satisfied. In this way, when the initial temperature of cooking is relatively high or is estimated to be high, the cut-off temperature is set to be relatively high, and a long time until extinction is secured. Can do. Therefore, it becomes easy to prevent the automatic cooking time from becoming too short when the initial temperature is high.

  When the temperature detected by the thermistor 16 (temperature sensor) is lower than the threshold temperature at the initial stage of cooking in the automatic cooking mode, the control circuit 10 (cooking control unit) or a time elapsed since the previous extinguishing of the grill burner is a fixed time. Is exceeded, the cutoff temperature is set according to the first characteristic information for setting the cutoff temperature value gradually lower as time elapses after the grill burner enters the ignition state, and the temperature is set at the initial stage of cooking in the automatic cooking mode. When the temperature detected by the sensor is equal to or higher than the threshold temperature, or when the elapsed time since the previous fire extinguishing of the grill burner is less than a certain time, the cutoff temperature value is set as time elapses after the grill burner enters the ignition state. The cutoff temperature is set according to the second characteristic information that is gradually set lower. Then, the second characteristic information has a higher cutoff temperature value set in accordance with the elapsed time than the first characteristic information. In this way, when the initial temperature of cooking is relatively high or estimated to be high, the cut-off temperature is set to be relatively high, and a long time until extinction is secured. Can do. While realizing such a relative relationship, in any case, the cut-off temperature can be set lower as time elapses from the ignition of the grill burner.

  The operation panel 18 and the rotation operation unit 6D corresponding to the operation unit can instruct the start of cooking in a plurality of types of automatic cooking modes. When the control circuit 10 (cooking control unit) is instructed to the first automatic cooking mode by the operation panel 18 and the rotation operation unit 6D and is set to the second heating power state in step S5, the grill burner is set in step S10. Is maintained in the second heating power state until the fire extinguishes, and when the second automatic cooking mode is instructed by the operation panel 18 and the rotary operation unit 6D, the predetermined switching condition is set when the second heating power state is set in step S5. After the second thermal power state is maintained until is established, it may be switched to the first thermal power state. In this way, when the initial temperature of cooking is relatively high or estimated to be high in the second automatic cooking mode, at first, the scorching is suppressed by the relatively weak heating power, and the inside is slowly taken into the inside. It can be heated, and after that, it becomes easy to burn the surface with a relatively strong heating power. The predetermined switching condition in this case may be a time condition in which a predetermined time elapses from step S2, and a temperature condition in which the temperature of the thermistor 16 reaches a predetermined temperature (for example, a temperature lower than the cutoff temperature by a predetermined value). It may be.

<Other embodiments>
The present invention is not limited to each aspect or modification of the embodiment of the present specification, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in the embodiments described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the effects described above, replacement or combination can be performed as appropriate. If the technical feature is not described as essential in this specification, it can be deleted as appropriate. Examples of changes include the following.

  Although the built-in stove is illustrated as an example of the gas stove in the first embodiment, a table stove may be used.

  In the first embodiment, the period within a certain time (for example, 30 seconds) after the gas burner 54 is ignited in step S1 is set as “the initial stage of cooking in the automatic cooking mode”, but the ignition control of the gas burner 54 is performed. The timing or the timing immediately after the ignition control of the gas burner 54 is performed may be set as “the initial stage of cooking in the automatic cooking mode”.

  In the first embodiment, the time period from the determination of Yes in step S3 (that is, after the second thermal power state is set in step S5) until the temperature of the thermistor 16 reaches the cutoff temperature is a predetermined time (the thermal power of the grill burner is However, it is also possible to set the “predetermined time” from the time when the second thermal power state is maintained in step S5 until a predetermined time elapses. Or it is good also as "predetermined time" until it reaches a fixed temperature after setting it as a 2nd thermal-power state in step S5.

  In the first embodiment, the state in which the thermal power of the upper burner 54A is weak thermal power and the thermal power of the lower burner 54B is strong thermal power is referred to as “second thermal power state”, but the thermal power is weaker than the first thermal power state. I just need it. For example, a state in which the thermal power of the upper burner 54A is weak thermal power and the thermal power of the lower burner 54B is weak thermal power may be a “second thermal power state”. In the first thermal power state, at least one of the upper burner 54A and the lower burner 54B may be weaker than the strong thermal power. In this case, the thermal power is weakened in the second thermal power state than in the first thermal power state. It only has to be.

  In the first embodiment, the heating power of the upper burner and the lower burner is switched to two stages, but the structure may be switched to three or more stages, or may be a structure that can be continuously changed.

  In the first embodiment, the condition that the temperature detected by the temperature sensor in the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, or the condition that the elapsed time from the previous fire extinguishing of the grill burner is equal to or less than the predetermined time When one of the conditions is satisfied, the cutoff temperature value is set higher than that when the condition is not satisfied. However, the cutoff temperature condition may be the same without setting the cutoff temperature so high.

DESCRIPTION OF SYMBOLS 1 ... Gas stove 3 ... Grill warehouse 6D ... Rotation operation part (operation part)
10 ... Control circuit (ignition control unit, cooking control unit)
16 ... Thermistor (temperature sensor)
18 ... Operation panel (operation unit)
46D ... igniter circuit (ignition control unit)
54 ... Gas burner (grill burner)

Claims (3)

A grill that houses objects to be cooked;
A grill burner for heating the cooking object accommodated in the grill cabinet;
A temperature sensor for detecting the temperature in the grill or the temperature of exhaust from the grill; and
An operation unit for instructing the start of cooking in the automatic cooking mode;
An ignition control unit for igniting the grill burner when the operation unit instructs to start cooking in the automatic cooking mode;
When the operation unit is instructed to start cooking in the automatic cooking mode, and the temperature detected by the temperature sensor reaches a cut-off temperature, the cooking control unit that switches the grill burner to a fire extinguishing state;
Have
The cooking control unit
When the temperature detected by the temperature sensor is lower than a predetermined threshold temperature at the initial stage of cooking in the automatic cooking mode, or when the elapsed time from the previous fire extinguishing of the grill burner exceeds a predetermined time, the predetermined time is reached. Maintaining the thermal power of the grill burner in the first thermal power state;
In the initial stage of cooking in the automatic cooking mode, when the temperature detected by the temperature sensor is equal to or higher than the threshold temperature, or when the elapsed time from the previous fire extinguishing of the grill burner is equal to or less than the predetermined time, the predetermined A gas stove that maintains the thermal power of the grill burner in a second thermal power state that is lower than the first thermal power state at a time. The cooking control unit
Either of the condition that the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, or the condition that the elapsed time from the previous fire extinguishing of the grill burner is equal to or less than the predetermined time. The gas stove according to claim 1, wherein the value of the cut-off temperature is set higher when the condition is satisfied than when the condition is not satisfied.
The cooking control unit
When the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is less than the threshold temperature, or when the elapsed time since the previous fire extinguishing of the grill burner exceeds the predetermined time, the grill burner is ignited. Setting the cut-off temperature according to first characteristic information for setting the cut-off temperature value gradually lower as time elapses after entering the state;
When the temperature detected by the temperature sensor at the initial stage of cooking in the automatic cooking mode is equal to or higher than the threshold temperature, or when the elapsed time from the previous fire extinguishing of the grill burner is equal to or less than the predetermined time, the grill burner is Setting the cut-off temperature according to the second characteristic information for setting the cut-off temperature value gradually lower as time elapses from the ignition state;
The gas stove according to claim 1 or 2, wherein the second characteristic information has a higher cutoff temperature value set according to the elapsed time than the first characteristic information.