JP5980824B2 - grill - Google Patents

Description

  The present invention relates to a grill having a function of detecting a misfire of a burner and forcibly stopping gas supply to the burner.

  In a conventional grill provided with a burner in the heating chamber, if the burner misfires for some reason during cooking, and the output value of the flame detection sensor falls below a predetermined misfire judgment reference value, the gas to the burner An apparatus having an automatic stop function for stopping supply and preventing raw gas from being continuously released from the burner is known (see, for example, Patent Documents 1 and 2).

JP 2011-315 A JP 2005-102849 A

  However, in the above-described conventional grill, if a large amount of water vapor is generated from the ingredients during cooking and fills the heating chamber, and the internal pressure of the exhaust passage rises, the combustion exhaust of the burner becomes difficult to be discharged outside the heating chamber. The combustion state of the burner tends to become unstable (part A in FIG. 5). In particular, when cooking is performed using a grill plate instead of the grill, water vapor is also generated from the broth of the food accumulated on the surface of the grill plate, so the combustion state of the burner becomes more unstable. If the combustion state of the burner becomes unstable in this way, the heating amount of the food and the grill plate is insufficient, and the finished state may be uneven. In addition, in the conventional grill having the automatic stop function as described above, when the combustion state of the burner becomes unstable, the output of the flame detection sensor easily falls below the misfire determination reference value and is being cooked. There was also a risk that the burner was forcibly extinguished.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve cooking performance in a grill having a function of detecting the misfire of a burner and forcibly stopping the supply of gas to the burner. There is to plan.

The present invention is a grill provided with a burner in a heating chamber, and when the output value of a flame detection sensor for detecting the combustion state of the burner falls below a predetermined heating power switching reference value during combustion of the burner, The means for executing the thermal power switching operation for increasing the gas supply amount by a predetermined amount, and the gas supply to the burner is stopped if the output value falls below the misfire determination reference value lower than the thermal power switching reference value during combustion of the burner. Executing means for forcibly stopping operation and means for executing reference adjustment operation for lowering the misfire determination reference value by a predetermined value or increasing the output value by a predetermined value if the output value is equal to or lower than the heating power switching reference value during combustion of the burner It is equipped with.

In this case, even if a large amount of water vapor is generated in the heating chamber during cooking and the combustion state of the burner becomes unstable, if the output of the flame detection sensor falls to a predetermined value (thermal power switching reference value), the burner Since the amount of gas supplied to the container is increased and the heating power is increased, the food can be sufficiently heated. Moreover, in this case, even if the burner combustion state becomes unstable during cooking, the burner heating power is increased before the flame detection sensor output reaches the misfire determination reference value, and the flame detection sensor output is increased. Therefore, it is possible to prevent the burner from being forcibly extinguished . Further, in this case, even if the combustion state of the burner becomes unstable during cooking, if the output of the flame detection sensor falls to the heating power switching reference value, the misfire determination reference value is lowered or the output value of the flame detection sensor To increase the difference between the misfire determination reference value and the output value, it is possible to more reliably prevent the burner from being unnecessarily forcibly extinguished .

  In addition, the present invention is capable of cooking by introducing a dish-shaped grill plate in which ingredients are placed in a heating chamber in the grill.

  In cooking using a grill plate, a large amount of water vapor is generated from the broth of ingredients accumulated on the grill plate during cooking, and the combustion state of the burner tends to become more unstable. The unnecessary fire extinguishing of the burner when it becomes stable can be prevented, and the food and the grill plate can be continuously heated with sufficient heating power.

  Further, according to the present invention, in the grill, after the heating power switching operation is performed, if the output value is equal to or higher than the return reference value higher than the heating power switching reference value, the gas supply amount to the burner is increased by a set amount before the increase. It is provided with the execution means of the switching cancellation | release operation | movement which returns to.

  In this case, during cooking, if the burner's thermal power is increased by the thermal power switching operation, and the flame detection sensor output rises to a value higher than the thermal power switching reference value (return standard value), the gas to the burner Since the supply amount is returned to the amount before the increase and the heating power is lowered, the food can be prevented from being heated excessively.

  As described above, according to the present invention, even if a large amount of water vapor is generated in the heating chamber during cooking, the food can be sufficiently heated, and the burner is forcibly extinguished unnecessarily. Since cooking can be prevented, cooking performance is improved.

FIG. 1 is a side view schematic longitudinal sectional view of a gas stove provided with a grill according to an embodiment of the present invention. FIG. 2 is a schematic configuration of a gas stove provided with a grill according to an embodiment of the present invention. FIG. 3 is a flowchart showing a control operation in plate cooking of the grill according to the embodiment of the present invention. FIG. 4 is a graph showing an output change of the burner of the grill according to the embodiment of the present invention. FIG. 5 is a graph showing changes in output of a conventional grill burner.

Next, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a so-called built-in type gas stove 1 that is mounted in a state of being dropped into a mounting opening K1 provided in a countertop K of a system kitchen. A grill 2 according to an embodiment of the present invention is integrated with a stove body 10. It is structured. Further, the top plate 100 on the upper surface of the stove body 10 is provided with one or a plurality of stove burners 12 and an exhaust port 13 for discharging combustion exhaust gas emitted from the grill burners 22 and 23 to the outside of the gas stove 1. It has been.

  The grill 2 heats the food F in the heating chamber 20, the exhaust chamber 21 that guides oil smoke, odor components, water vapor, etc. generated in the heating chamber 20 to the exhaust port 13, and the heating chamber 20. Grill burners 22 and 23, and an after burner 24 for heating and eliminating oil smoke and odor components introduced into the exhaust cylinder 21 from the heating chamber 20.

  At the front part of the stove main body 10, an outlet 200 for taking in and out the food F in the heating chamber 20 is provided. In addition, the outlet 200 is provided with a grill door 25 that slides back and forth. A tray receiving frame 250 is connected to the rear surface portion of the grill door 25, and a dish-shaped grill tray 26 that receives a broth such as oil or moisture leaked from the food F is placed on the tray receiving frame 250. Is placed. A grill net (not shown) and a grill plate 27 for mounting the food F are attached to the upper portion of the tray receiving frame 250 and above the grill tray 26. Therefore, when the grill door 25 is opened, the grill net 26 and the grill plate 27 are pulled out from the outlet 200 together with the grill tray 26.

  The grill plate 27 is a flat plate-like plate body made of a metal having high thermal conductivity (for example, aluminum), and the food F is placed on the upper surface 270 thereof. In addition, a plurality of upward rib-shaped protrusions 271 are formed on the upper surface (food material placement surface) 270 of the grill plate 27. Further, although not shown, a groove portion for collecting the broth leaked to the food material placing surface 270 is formed at a position outside the left and right ends of the rib-like protrusions 271 on the food material placing surface 270. The grill plate 27 may be formed of a ceramic material, or may be formed of two or more materials having high thermal conductivity.

  An exhaust opening 201 is opened at the back of the heating chamber 20. The exhaust tube 21 extends obliquely upward from the exhaust opening 201 toward the exhaust port 13, and combustion exhaust gas and hot air of gas released from the grill burners 22 and 23, oily smoke and odor components released from the food F The water vapor and the like are led from the exhaust opening 201 to the exhaust port 13 through the exhaust cylinder 21 and are discharged to the outside outside the gas stove 1.

  The grill burners 22 and 23 include an upper fire burner 22 disposed along the upper wall 202 of the heating chamber 20 and a lower fire burner 23 disposed along the left and right side walls 203 of the heating chamber 20. When cooking the food F using the plate 27 (plate cooking), the food F and the grill plate 27 are caused by combustion exhaust or radiant heat of the gas released downward from the flame hole 220 of the upper fire burner 22. Is heated from above, and the grill plate 27 is heated from below by the combustion exhaust and radiant heat of the gas released from the flame hole 230 of the lower fire burner 23 to the side (center side of the grill cabinet 20). . In the case where the food F is cooked by using a grill net instead of the grill plate 27, the food F can be seen from the top, bottom, left and right by the combustion exhaust and radiant heat of the gas emitted from the upper fire burner 22 and the lower fire burner 23. Be heated.

  The upper fire burner 22 is a surface combustion type ceramic burner having a lower surface portion made of a ceramic plate, and a flame hole 220 is formed in substantially the entire lower surface portion of the plate. Therefore, when ignited, a gas combustion flame is formed on the entire lower surface of the plate, and the radiant heat and combustion exhaust are radiated downward toward the center of the heating chamber 20.

  The afterburner 24 is disposed at a position near the exhaust opening 201 in the bottom wall 211 of the exhaust cylinder 21, and is discharged upward from the flame hole 240 of the afterburner 24 toward the vicinity of the outlet of the exhaust opening 201. Due to the combustion of the gas, oil smoke and odor components introduced into the exhaust cylinder 21 are heated and lost.

  In the vicinity of each flame hole 220, 230 of the grill burners 22, 23, there is an ignition plug 31 that sparks toward the periphery of the corresponding flame hole 220, 230 when a high voltage is applied from an igniter 30 described later. A thermocouple 32 is provided as a flame detection sensor for detecting the presence or absence of a combustion flame in the corresponding flame holes 220 and 230. Similarly to the grill burners 22 and 23, the spark plug 31 and the thermocouple 32 are also provided in the vicinity of the flame hole 240 of the afterburner 24. In addition, in the vicinity of the exhaust opening 201 in the heating chamber 20, a chamber temperature sensor 33 that detects the temperature in the heating chamber 20 is provided.

  As shown in FIG. 2, a gas pipe 200 that guides the gas supplied from the gas main pipe to each burner 22, 23, 24 is disposed inside the stove body 10. Further, the gas pipe line 200 has an electromagnetic on-off valve 34 capable of shutting off the gas supply to the corresponding burners 22, 23, 24, and a thermal power capable of adjusting the gas supply amount to the corresponding grill burners 22, 23. A switching valve 35 is provided. Although not shown, the thermal power switching valve 35 is a valve device constituted by an on-off valve and a bypass passage, and by closing the on-off valve, gas is supplied from only the bypass passage to the downstream side, and a corresponding burner is provided. Burn 22 and 23 with low heat. On the other hand, by opening the on-off valve, gas is supplied from both the on-off valve and the bypass passage to the downstream side, and the corresponding burners 22 and 23 are burned with high heat.

  On the front portion of the stove body 10, a point fire extinguishing operation unit 36 for igniting and extinguishing the grill burners 22 and 23, a mode switching operation unit 37 for switching the cooking mode of plate cooking, and a timer cooking mode A timer setting operation unit 38 for setting the heating time of the food F is provided. The point fire extinguishing operation unit 36 also has a function of manually adjusting the heating power of the grill burners 22 and 23.

  Inside the stove main body 10, an audio output unit 39 for notifying the operation information of the gas stove 1 by voice and an igniter 30 for applying a high voltage to each spark plug 31 are incorporated. Further, a control circuit 40 for controlling the operation of the entire gas stove 1 is incorporated in the stove body 10, and an audio output unit 39, an igniter 30, a thermocouple 32, an internal temperature sensor 33, an electromagnetic on-off valve 34, a thermal power The switching valve 35, the point fire extinguishing operation unit 36, the mode switching operation unit 37, and the timer setting operation unit 38 are connected to the control circuit 40 through electric wiring.

  The control circuit 40 ignites the grill burners 22 and 23 in accordance with the ignition operation of the point fire extinguishing operation unit 36, and extinguishes the grill burners 22 and 23 in accordance with the fire extinguishing operation of the point fire extinguishing operation unit 36. A heating power adjustment control unit that adjusts the heating power of the grill burners 22 and 23 according to the heating power adjustment operation of the unit 36, a mode switching control unit that switches the combustion control routine of the grill burners 22 and 23 according to the mode selection operation of the mode switching operation unit 37, Timer cooking control for automatically extinguishing the grill burners 22 and 23 when the timer cooking time S1 arbitrarily set by the timer setting operation unit 38 has elapsed since the grill burners 22 and 23 were ignited when the timer cooking mode was selected. When the automatic cooking mode is selected, the grill burners 22 and 23 are fired with a preset combustion pattern. It has a circuit configuration of the automatic cooking control unit for adjusting the.

  The gas stove 1 according to the present embodiment has a plurality of types of automatic cooking modes such as a “baked fish mode” suitable for baking fish and a “toast mode” suitable for baking bread. By operating the operation unit 37, the user can arbitrarily select a desired auto cooking mode.

  Further, in each cooking mode, when the temperature T detected by the internal temperature sensor 33 reaches a preset reference temperature T1 during combustion of the grill burners 22 and 23, the control circuit 40 supplies gas to the grill burners 22 and 23. An output of a thermocouple (hereinafter referred to as “upper fire sensor”) 32 corresponding to the upper fire burner 22 during the combustion of the upper fire burner 22 during execution of the heating control operation (heating control section) for reducing the supply amount by a predetermined amount When the value (electromotive voltage) V becomes equal to or less than a preset misfire determination reference value V1, the execution unit (forced stop control unit) for stopping the supply of gas to the upper fire burner 22 and the upper fire burner 22 When the electromotive voltage V of the upper fire sensor 32 becomes equal to or less than a preset thermal power switching reference value V2 during combustion of the above, a thermal power switching operation executing unit (increase the gas supply amount to the upper fire burner 22 by a predetermined amount) Thermal power switching control unit), top After the thermal power switching operation is executed, if the electromotive voltage V of the upper fire sensor 32 continues for a predetermined time or more and is equal to or higher than the preset return reference value V3, the amount of gas supplied to the upper fire burner 22 is not increased. A circuit configuration such as an execution unit (switching cancellation control unit) of switching cancellation operation for returning to the set amount is provided.

  Next, the control operation at the time of cooking the plate of the grill 2 by the control circuit 40 will be described with reference to FIG. After “timer cooking mode” is selected by the mode switching operation unit 37 and the timer cooking time S1 is manually set by the timer setting operation unit 38, the ignition operation of the grill burners 22 and 23 is performed by the point fire extinguishing operation unit 36. When this is done, sparks are discharged from each spark plug 31, each thermal power switching valve 35 is set to a predetermined large flow rate (open / close valve is “open”), and each electromagnetic open / close valve 34 is opened. As a result, grill burners 22 and 23 are ignited, and heating of food F and grill plate 27 is started in a strong fire (ST1 to ST5).

  Although not shown, when the grill burners 22 and 23 are fired by the point fire extinguishing operation section 36 after the grill burners 22 and 23 are ignited, the electromagnetic on-off valves 34 are closed to extinguish the grill burners 22 and 23. Let Further, the afterburner 24 is ignited together with the grill burners 22 and 23, and is extinguished after a lapse of a fixed time after the grill burners 22 and 23 are extinguished. Thereby, even after the cooking of the food F is completed, the heating and disappearance of the oil smoke and the odor component led from the heating chamber 20 into the exhaust pipe 21 is performed for a certain time.

  When the upper burner 22 is ignited in step ST4, a timer (not shown) incorporated in the control circuit 40 is activated, and the detected temperature T of the internal temperature sensor 33 is the reference temperature T1 (for example, 230 ° C.). , Whether the timer measurement time S has reached the timer cooking time S1 (for example, 20 minutes), and the electromotive voltage V of the upper fire sensor 32 is the misfire determination reference value V1 (for example, 2) .5 mV) or less is started to be monitored (ST6 to ST8).

  When the temperature T detected by the internal temperature sensor 33 reaches the reference temperature T1 (Yes in step ST6), each thermal power switching valve 35 is set to a predetermined small flow rate (the on-off valve is “closed”), Furthermore, the electromotive voltage V of the upper fire sensor 32 is equal to or less than the thermal power switching reference value V2 (for example, 3.5 mV), the timer measurement time S reaches the timer cooking time S1, or the electromotive voltage of the upper fire sensor 32 Until the V becomes equal to or less than the misfire determination reference value V1, the heating of the food F and the grill plate 27 is continued with low heat (ST9 to ST12).

  Thereafter, when the timer measurement time S reaches the timer cooking time S1 (Yes in step ST11), the electromagnetic on-off valves 34 are closed to automatically extinguish the grill burners 22 and 23, and the heating of the ingredients F and the grill plate 27 is completed. (ST13).

  On the other hand, before the timer measurement time S reaches the timer cooking time S1, the upper fire burner 22 misfires for some reason, and the electromotive voltage V of the upper fire sensor 32 falls to the misfire determination reference value V1 or less (ST12). In step Yes), each electromagnetic on-off valve 34 is quickly closed to stop the gas supply to the grill burners 22 and 23, and a sound indicating that a misfire has occurred is output from the sound output unit 39 (ST14 to ST14). ST15).

  In step ST7, as in step ST11, if the timer measurement time S reaches the timer cooking time S1 (Yes in step ST7), step ST13 is executed. Similarly to the step ST12, the step ST8 executes the steps ST14 and ST15 if the electromotive voltage V of the upper fire sensor 32 falls to the misfire determination reference value V1 or less (Yes in step ST8).

  Further, before the timer measurement time S reaches the timer cooking time S1, a large amount of water vapor is generated from the moisture and food F accumulated in the grill plate 27, and the combustion state of the upper burner 22 becomes unstable (FIG. 4). When the electromotive voltage V of the upper fire sensor 32 has dropped to the thermal power switching reference value V2 or less (Yes in step ST10), the thermal power switching valve 35 corresponding to the upper fire burner 22 is set to a large flow rate. (The on-off valve is “open”), and the upper fire burner 22 is switched to a high fire. As a result, the electromotive voltage V of the upper fire sensor 32 increases (part B in FIG. 4), so that even if the combustion state of the upper fire burner 22 is somewhat unstable, it is difficult to reach the misfire determination reference value V1 (ST16). ).

  Further, after the upper fire burner 22 is switched to a strong fire in step ST16, the state where the electromotive voltage V of the upper fire sensor 32 is equal to or higher than the return reference value V3 (for example, 10 mV) is a predetermined time (for example, 10 seconds). ) Monitoring is started as to whether or not the above operation has continued and whether or not the electromotive voltage V of the upper fire sensor 32 has fallen below the misfire determination reference value V1 (ST17 to ST19).

  If the electromotive voltage V of the upper fire sensor 32 falls below the misfire determination reference value V1 before the predetermined time elapses (Yes in step ST19), the upper fire burner 22 may misfire. As a result, the above-described steps ST14 and ST15 are executed. On the other hand, if the electromotive voltage V of the upper fire sensor 32 is equal to or higher than the return reference value V3 for a predetermined time or longer (Yes in step ST18), the possibility that the upper fire burner 22 is misfired is reduced. The heating power switching valve 35 corresponding to the upper fire burner 22 is set to a small opening, the upper fire burner 22 is returned to low heat again, and the process returns to step ST10 (ST20).

  When the “auto cooking mode” is selected by the mode switching operation unit 37, the combustion pattern such as the heating power switching reference temperature and the auto cooking time of the grill burners 22 and 23 corresponding to the selected auto cooking mode is automatically set. The When the ignition operation of the grill burners 22 and 23 is performed by the point fire extinguishing operation unit 36, the combustion of the grill burners 22 and 23 corresponding to the combustion pattern is started.

  Thereafter, when the timer measuring time S reaches the auto cooking time, the grill burners 22 and 23 are automatically extinguished in the same manner as in the above-described step ST13, and the heating of the food F and the grill plate 27 is terminated. When the electromotive voltage V of the upper fire sensor 32 falls to the misfire determination reference value V1 or less before reaching the auto cooking time, the gas is supplied to the grill burners 22 and 23 as in the above-described steps ST14 and ST15. While stopping, the sound output unit 39 outputs a sound indicating that a misfire has occurred.

  On the other hand, if the electromotive voltage V of the upper fire sensor 32 falls to the heating power switching reference value V2 or less before the timer measuring time S reaches the automatic cooking time, the upper fire burner 22 is turned on in the same manner as in the above-described step ST16. Force to switch to high fire. As a result, the electromotive voltage V of the upper fire sensor 32 increases (part B in FIG. 4), so that even if the combustion state of the upper fire burner 22 is somewhat unstable, it is difficult to reach the misfire determination reference value V1.

  Further, after the upper fire burner 22 is forcibly switched to a strong fire, the state where the electromotive voltage V of the upper fire sensor 32 is equal to or higher than the return reference value V3 continues for a predetermined time or more as in the above-described steps ST17 to ST19. And whether or not the electromotive voltage V of the upper fire sensor 32 has become equal to or less than the misfire determination reference value V1.

  If the electromotive voltage V of the upper fire sensor 32 falls to the misfire determination reference value V1 or less before the predetermined time elapses, the possibility that the upper fire burner 22 will misfire is increased. Similarly to the step of ST15, the supply of gas to the grill burners 22 and 23 is stopped, and the sound output unit 39 notifies that the misfire has occurred. On the other hand, after the upper fire burner 22 is switched to a strong fire, if the electromotive voltage V of the upper fire sensor 32 is equal to or higher than the return reference value V3 for a predetermined time or longer, the possibility of the upper fire burner 22 misfiring is low. As a result, the combustion control of the grill burners 22 and 23 corresponding to the combustion pattern is performed again.

  Thus, according to the above embodiment, even if a large amount of water vapor is generated in the heating chamber 20 during cooking of the food F, and the combustion state of the upper fire burner 22 becomes unstable, the upper fire sensor 32. If the electromotive force V is reduced to a predetermined heating power switching reference value V2, the heating power of the upper fire burner 22 is increased to a strong fire, so that the food F and the grill plate 27 can be sufficiently heated. Moreover, in this case, even if the combustion state of the upper fire burner 22 becomes unstable during cooking, the thermal power of the upper fire burner 22 is reduced before the electromotive force V of the upper fire sensor 32 reaches the misfire determination reference value V1. Since it raises to a strong fire and increases the electromotive force V of the upper fire sensor 32, it is possible to prevent the grill burners 22 and 23 from being forcibly extinguished unnecessarily. Therefore, cooking performance is improved.

  Moreover, in this thing, as a result of raising the heating power of the upper fire burner 22 to a strong fire by the heating power switching operation during the cooking of the food F, the return reference value V3 in which the electromotive force V of the upper heating sensor 32 is higher than the heating power switching reference value V2 is obtained. When the temperature rises, the heating power of the upper burner 22 is lowered to the original low heat, so that the food F and the grill plate 27 can be prevented from being heated excessively. Therefore, the cooking performance is further improved.

  Furthermore, even when the heating power of the upper fire burner 22 is increased to a high level by the heating power switching operation and the electromotive force V of the upper heating sensor 32 is increased during the cooking of the food F, the starting power of the upper heating sensor 32 is increased. If the electric power V decreases to the misfire determination reference value V1, the grill burners 22 and 23 are immediately extinguished, so that misfire can be prevented in advance. Therefore, safety is also high.

Although not shown, in the above embodiment, when the electromotive voltage V above fire sensor 32 drops to less thermal switching reference value V2 (Yes in ST10 step), it switches the upper fire burner 22 to high heat, the misfire determination reference value V1 is configured to decrease the predetermined value. Alternatively , when the electromotive voltage V of the upper fire sensor 32 falls to the heating power switching reference value V2 or less (Yes in step ST10), the upper fire burner 22 is switched to a high fire and the electromotive voltage V of the upper fire sensor 32 is set to a predetermined value. and value added, is configured to perform a switching release determination (ST17) and misfire determination (ST19) using electromotive force V after the predetermined value added.

By was constructed as shown in this, even if the unstable combustion state of the upper fire burner 22 during cooking, because the electromotive force V above fire sensor 32 is less likely to reach the misfire determination reference value V1, Gurirubana It can prevent more reliably that 22 and 23 will be forcedly extinguished unnecessarily. Therefore, the cooking performance is further improved.

In the above-described embodiment, the configuration has been described in which the thermal power of the grill burners 22 and 23 is switched by the thermal power switching valve 35 configured by the on-off valve and the bypass passage. However, the supply of gas to the grill burners 22 and 23 is described. The heating power of the grill burners 22 and 23 may be adjusted by a proportional control valve whose amount can be adjusted steplessly within a predetermined range.

  In the present invention, a burner corresponding to the upper fire burner 22 is disposed only on the upper wall 20 or the left and right side walls 203 of the heating chamber 20, and the so-called single-sided firing type not provided with the burner corresponding to the lower fire burner 23. It can also be applied to grills.

2 Grill 20 Heating chamber 22 Upper fire burner (burner)
23 Thermocouple (flame detection sensor)
27 Grill Tray 270 Upper surface of grill tray (grown material placement surface)
40 Control circuit F

Claims (3)

A grill provided with a burner in the heating chamber,
During combustion of the burner, if the output value of the flame detection sensor that detects the combustion state of the burner is less than or equal to a predetermined heating power switching reference value, a thermal power switching operation executing means for increasing the gas supply amount to the burner by a predetermined amount;
During combustion of the burner, if the output value falls below a misfire determination reference value lower than the thermal power switching reference value, execution means for forced stop operation to stop the gas supply to the burner ;
A grill, comprising: means for performing a reference adjustment operation for lowering the misfire determination reference value by a predetermined value or increasing the output value by a predetermined value if the output value becomes equal to or less than the thermal power switching reference value during combustion of the burner . The grill according to claim 1,
A grill that can be cooked by introducing a dish-shaped grill plate with ingredients in the heating chamber. The grill according to claim 1 or 2,
After the thermal power switching operation is performed, when the output value is equal to or higher than the return reference value higher than the thermal power switching reference value, a switching cancellation operation executing means for returning the gas supply amount to the burner to the set amount before the increase is provided. The grill.

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