JP3822066B2 - Gas cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to combustion control of a gas cooker that heats a food placed on an upper portion of a combustion chamber by an all-primary combustion type burner provided in the combustion chamber.
[0002]
[Prior art]
Conventionally, as shown in FIG. 10 (a), a gas cooker in which the upper surface of a combustion chamber provided with a burner 100 is a glass plate 101 and the food placed on the glass plate 101 is heated. Are known. In such a gas cooker, combustion air is supplied to the burner 100 by the supply / exhaust fan 102 and the combustion exhaust of the burner 100 is discharged from the exhaust port 103.
[0003]
FIG. 10B is a cross-sectional view of the heating cooker shown in FIG. 10A viewed from the left side, and the controller 105 sets the target combustion amount of the burner 100 adjusted by the combustion amount adjusting unit 104. Accordingly, the flow rate of the fuel gas supplied from the gas supply path (not shown) to the mixing tube 106 and the flow rate of the combustion air supplied from the supply / exhaust fan 102 to the mixing tube 106 are set. Thus, an air-fuel mixture of fuel gas and combustion air mixed at an appropriate mixing ratio is supplied to the burner 100, and the burner 100 can be burned while maintaining a good air-fuel ratio.
[0004]
However, in the process of using the gas cooker, oil or dust may adhere to the supply passage (not shown) or the exhaust passage 107 of the gas cooker. And if such adhesion of oil and dust advances, supply of the combustion air with respect to the burner 100 will be prevented, and incomplete combustion of the burner 100 will arise by lack of combustion air.
[0005]
And when the user of the gas cooker did not notice the incomplete combustion of the burner 100, there was an inconvenience that the incomplete combustion of the burner 100 was continued.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a cooking device that solves the above-mentioned disadvantages and prevents the incomplete combustion from continuing when the incomplete combustion of the burner occurs.
[0007]
[Means for Solving the Problems]
The present invention has been made in order to achieve the above object, and is an all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on an upper surface, and fuel for supplying fuel gas to the burner. The present invention relates to an improvement in a gas cooker including a gas supply means and an exhaust passage having one end communicating with the combustion chamber and the other end communicating with an exhaust port.
[0010]
The first aspect of the present invention, an oxidation catalyst provided in the vicinity of the exhaust port, a temperature detecting means for detecting the temperature in the vicinity of the oxidation catalyst, the temperature detecting means during combustion of the burner Combustion abnormality countermeasure means for performing at least one of stoppage of supply of fuel gas from the fuel gas supply means to the burner and notification of abnormality when the detected temperature is equal to or lower than a predetermined temperature. It is characterized by.
[0011]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, unburned gas or the like led to the exhaust port is near the exhaust port. In this way, catalytic combustion is performed in contact with the oxidation catalyst and air without generating a combustion flame. Therefore, the combustion flame by secondary combustion does not overflow from the exhaust port. In addition, due to consumption of incomplete combustion gas by catalytic combustion, it is possible to reduce the concentration of incomplete combustion gas such as CO discharged from the exhaust port.
[0012]
Then, since heat is generated with the catalytic combustion, the combustion abnormality coping means is configured to perform catalytic combustion when the temperature detected by the temperature detecting means provided near the exhaust port becomes equal to or higher than the predetermined temperature. In order to perform at least one of stopping the supply of fuel gas from the fuel gas supply means to the burner and notifying the abnormality, the incomplete combustion of the burner is prevented from continuing. be able to. Further, in order for secondary combustion of unburned gas generated by incomplete combustion of the burner to occur, it is premised that the temperature and concentration of the unburned gas become somewhat high, but the catalytic combustion is secondary. Since it occurs in a state where the temperature and concentration of the unburned gas are lower than when combustion occurs, according to the present invention, the incomplete combustion can be detected earlier.
[0013]
Furthermore , according to the first aspect, the temperature detecting means is configured to detect the temperature difference between the upstream side and the downstream side of the oxidation catalyst as the detected temperature, whereby the temperature difference before and after the catalytic combustion occurs. Therefore, it is possible to reliably detect the occurrence of the catalytic combustion.
[0014]
The second aspect of the present invention includes a secondary air inlet provided in the middle of the exhaust passage, flame detection means provided in the vicinity of the inlet for detecting a combustion flame, and the burner. When a combustion flame due to secondary combustion is detected by the flame detection means during combustion, at least one of the stop of the supply of fuel gas from the fuel gas supply means to the burner and an abnormality notification And a combustion abnormality coping means for performing the above.
[0015]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, the secondary air inlet provided in the middle of the exhaust passage The unburned gas or the like led to contact with the air flowing in from the inlet, and secondary combustion occurs. In this case, since secondary combustion occurs in the exhaust passage, it is possible to suppress the overflow of flame from the exhaust port. The combustion abnormality coping means is configured such that when a combustion flame due to secondary combustion is detected by the flame detection means provided in the vicinity of the secondary air inlet, the fuel gas supply means supplies the burner to the burner. Since at least one of the stop of the fuel gas supply and the abnormality notification is performed, incomplete combustion of the burner can be prevented from continuing.
[0016]
In the second embodiment, the flame detection means can be cooled by the secondary air by providing the flame detection means in a path through which air flows from the secondary air inlet. Thus, it is possible to suppress deterioration of the flame detection means due to heating.
[0017]
Further, the third aspect of the present invention is provided with a secondary air inlet provided in the middle of the exhaust passage, an oxidation catalyst provided in the vicinity of the inlet, and in the vicinity of the oxidation catalyst. Temperature detection means, and when the temperature detected by the temperature detection means becomes equal to or higher than a predetermined temperature during combustion of the burner, stop supply of fuel gas from the fuel gas supply means to the burner, And a combustion abnormality coping means for performing at least one of the above.
[0018]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, the secondary air inlet provided in the middle of the exhaust passage The unburned gas or the like led to contact with the air flowing in from the inlet and the oxidation catalyst to cause catalytic combustion. In the same manner as in the first aspect described above, the combustion abnormality countermeasure unit determines that catalytic combustion has occurred when the temperature detected by the temperature detection unit is equal to or higher than the predetermined temperature, and supplies the fuel gas supply. Since at least one of the supply stop of the fuel gas from the means to the burner and the abnormality notification is performed, the incomplete combustion of the burner can be prevented from continuing. Further, according to the present invention, catalytic combustion occurs in the exhaust passage, so that the vicinity of the exhaust port can be suppressed from becoming high temperature.
[0019]
Further, in the third aspect, by setting the temperature detecting means to detect the temperature difference between the upstream side and the downstream side of the oxidation catalyst as the detected temperature, from the temperature difference before and after the catalytic combustion occurs, Generation of the catalytic combustion can be reliably detected.
[0020]
Further, in the second aspect and the third aspect, on the downstream side of the inlet of the secondary air in the exhaust passage, ventilation of the exhaust passage is prevented to prevent combustion exhaust of the burner and the secondary air from flowing. By providing the exhaust passage closing means for promoting the mixing with the air flowing in from the inlet, the secondary combustion and the catalytic combustion can be easily generated. Thereby, incomplete combustion of the burner can be detected earlier.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of a gas table that is a gas cooker according to the present invention, FIG. 2 is a configuration diagram of a gas table according to an embodiment related to the present invention and the first embodiment of the present invention, and FIG. graph illustrating the variation of the output voltage and the CO concentration of the thermocouple to air ratio, FIG. 4 is a diagram showing the construction of a gas cooker in the second and third embodiments of the present invention, the second embodiment of FIG. 5 is the invention Explanatory drawing of the path | route of the unburned gas and secondary air of the gas table in the form of FIG. 6, FIG. 6-9 is a block diagram of the gas table in the 2nd Embodiment of this invention.
[0022]
Referring to FIG. 1 (a), a gas table 1 which is a gas cooker according to the present invention is a glass that forms the upper surface of a combustion chamber in which all primary combustion burners 2 (2a, 2b, 2c) are accommodated. The cooking table placed on the plate 3 is heated, and the operation of the gas table 1 and the supply / exhaust fan 5 for supplying combustion air to the burner 2 and sending the combustion exhaust of the burner 2 to the exhaust port 4 are performed. Controller 6 for controlling (including the function of the combustion abnormality countermeasure means of the present invention, comprising a microcomputer and a memory, etc.), operation switch for starting / stopping heating, setting of heating amount, etc. And an operation panel 7 provided with an abnormal lamp and the like. The gas table 1 is provided with a grill 8.
[0023]
Next, an embodiment related to the present invention will be described with reference to FIG. 1 (b) and FIG. 2 (a). FIG. 1B and FIG. 2B are cross-sectional views as viewed from the left side of the gas table 1 shown in FIG. A mixing pipe 10 communicates with the burner 2a, and fuel gas is injected into the mixing pipe 10 from a gas nozzle 12 connected to the tip of the gas supply pipe 11, and combustion air sucked by the supply / exhaust fan 5 is supplied. The gas is supplied to the mixing pipe 10 through the space 13, and the fuel gas and the combustion air are mixed in the mixing pipe 10. Then, the mixture of the fuel gas and the combustion air reaches the burner 2 a, the burner 2 a is combusted by complete primary combustion, and the combustion exhaust of the burner 2 a passes from the combustion chamber 14 through the exhaust passage 15 and from the exhaust port 4. Discharged.
[0024]
Here, the target combustion amount of the burner 2a is set by a heating amount setting switch provided on the operation panel 7, and the controller 6a determines the supply amount of fuel gas and combustion air according to the target combustion amount. Thus, the burner 2a is burned while maintaining a good air-fuel ratio. Then, the controller 6a supplies combustion air by controlling the rotation speed of the supply / exhaust fan 5 based on correlation data between the rotation speed of the supply / exhaust fan 5 and the supply amount of combustion air stored in advance in the memory. Although the amount is set, if dust or oil adheres to an air supply passage (not shown) communicating from the air supply / exhaust fan 5 to the air supply space 13 or the exhaust passage 15, combustion air corresponding to the rotational speed of the air supply / exhaust fan 5 Supply cannot be obtained.
[0025]
As a result, the supply amount of combustion air becomes insufficient with respect to the supply amount of fuel gas, and incomplete combustion of the burner 2a occurs. Therefore, in order to detect incomplete combustion of the burner 2a, a thermocouple 16 (corresponding to the flame detection means of the present invention) is provided in the vicinity of the exhaust port 4.
[0026]
As shown in FIG. 2 (a), when high-temperature unburned gas or incomplete combustion gas (hereinafter referred to as unburned gas or the like) reaches the exhaust port 4 and comes into contact with the air near the exhaust port 4, A combustion flame 20 is generated due to secondary combustion of fuel gas or the like. Here, FIG. 3 is a graph ((1) in the figure) showing the change of the CO concentration with respect to the primary air ratio (ratio of the primary air supply flow rate to the fuel gas supply flow rate) and the primary air ratio. The graph ((2) in the figure) which showed the change of the output voltage of the thermocouple 16 is shown. Then, from FIG. 3, when the primary air ratio becomes 1.0 or less and the supply of combustion air becomes insufficient, incomplete combustion of the burner 2a occurs, and the concentration of CO increases rapidly. It can be seen that the output voltage of the thermocouple 16 also increases due to the occurrence of secondary combustion.
[0027]
Therefore, when the output voltage of the thermocouple 16 becomes equal to or higher than a predetermined voltage (Vth in the figure), the controller 6a determines that a combustion flame due to secondary combustion has been detected, and supplies fuel gas to the burner 2a. Is stopped and combustion of the burner 2a is stopped, and an abnormal lamp (not shown) provided on the operation panel 7 (see FIG. 1A) is turned on to notify the user of the occurrence of incomplete combustion. Thereby, the controller 6a prevents the incomplete combustion of the burner 2 from being continued and notifies the user of the cause of the burner 2 being extinguished.
[0028]
Next, the first embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0029]
In the gas table shown in FIG. 2B, an oxidation catalyst 25 (platinum, palladium, ruthenium, etc.) is provided in the vicinity of the exhaust port 4. When incomplete combustion of the burner 2a occurs and unburned gas or the like is generated, unburned gas (CH ₄ or the like) sent to the vicinity of the exhaust port 4 via the exhaust passage 15 or incomplete combustion gas (CO or the like). ) Comes into contact with the oxidation catalyst 25 and air, catalytic combustion represented by the following chemical formulas (1) and (2) occurs.
[0030]
CH ₄ + 2O ₂ → CO ₂ + 2H ₂ O + Q ₁ (J) (1)
CO + 1 / 2O ₂ → CO ₂ + Q ₂ (J) (2)
The temperature in the vicinity of the exhaust port 4 rises due to the heat (Q ₁ , Q ₂ ) generated with this catalytic combustion. Therefore, the controller 6b determines that catalytic combustion has occurred when the temperature detected by the thermocouple 16 (corresponding to the temperature detecting means of the present invention) is equal to or higher than a predetermined temperature, and supplies the fuel gas to the burner 2a. Is stopped and combustion of the burner 2a is stopped, and an abnormal lamp (not shown) provided on the operation panel 7 is turned on. Thereby, the controller 6b prevents the incomplete combustion of the burner 2a from continuing.
[0031]
A thermocouple 26 is also provided on the upstream side of the oxidation catalyst 25, and it is determined that catalytic combustion has occurred when the difference between the detected temperature of the thermocouple 16 and the detected temperature of the thermocouple 26 exceeds a predetermined temperature. May be. In this way, since the temperature increase due to catalytic combustion can be detected by detecting the temperature difference between the upstream side and the downstream side of the oxidation catalyst 25, the controller 6b recognizes the occurrence of catalytic combustion more reliably. can do.
[0032]
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0033]
In the heating cooker shown in FIG. 4 (a), an inlet 30 for secondary air is provided in the middle of the exhaust passage 15, and the inlet 30 is connected to an air intake 31 provided on the lower surface of the heating cooker. Communicate. Further, a thermocouple 32 (corresponding to the flame detection means of the present invention) is provided in the vicinity of the inlet 30.
[0034]
When incomplete combustion of the burner 2a occurs in the heating cooker shown in FIG. 4A, unburned gas or the like generated by the incomplete combustion is sent out toward the exhaust port 4 via the exhaust passage 15. However, when it comes into contact with the air flowing in from the secondary air inlet 30, a combustion flame 33 is generated by secondary combustion of unburned gas. In this case, secondary combustion of unburned gas or the like occurs in the vicinity of the inlet 30 of the secondary air, so that the combustion flame 33 of the secondary combustion can be prevented from overflowing from the exhaust port 4.
[0035]
Then, the controller 6c determines that the combustion flame due to the secondary combustion has been detected when the thermoelectromotive force of the thermocouple 32 becomes equal to or higher than the predetermined level, as in the embodiment of FIG. Then, the supply of fuel gas to the burner 2a is stopped to stop the combustion of the burner 2, and an abnormal lamp (not shown) provided on the operation panel 7 (see FIG. 1A) is turned on.
[0036]
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0037]
In the cooking device shown in FIG. 4 (b), an inlet 35 for secondary air is provided in the middle of the exhaust passage 15, and the inlet 35 is connected to an air intake 36 provided on the front surface of the cooking device. Communicate. An oxidation catalyst 37 and a thermocouple 38 (corresponding to the temperature detecting means of the present invention) are provided on the downstream side in the vicinity of the inflow port 35. By providing the secondary air inlet 35 upstream of the oxidation catalyst 37 in this manner, oxygen flowing from the inlet 35 is reliably supplied to the oxidation catalyst 37 to facilitate catalytic combustion. .
[0038]
In the heating cooker shown in FIG. 4B, when incomplete combustion of the burner 2a occurs and unburned gas or the like is generated, the unburned gas or the like is sent toward the exhaust port 4 via the exhaust passage 15. Then, it contacts the oxidation catalyst 37 together with the air flowing in from the secondary air inlet 35, and catalytic combustion occurs.
[0039]
The temperature in the vicinity of the oxidation catalyst 37 is increased by the heat generated by the catalytic combustion (see the chemical formulas (1) and (2)). Therefore, as in the second embodiment described above, the controller 6d determines that catalytic combustion has occurred when the detected temperature of the thermocouple 38 is equal to or higher than a predetermined temperature, and the fuel gas to the burner 2a is determined. The supply is stopped and an abnormal lamp (not shown) provided on the operation panel 7 is turned on. Thereby, the controller 6d prevents the incomplete combustion of the burner 2a from continuing.
[0040]
Also in the third embodiment, similarly to the first embodiment described above, a thermocouple 39 is also provided on the upstream side of the oxidation catalyst 37 so that the detection temperature of the thermocouple 38 and the detection of the thermocouple 39 are detected. When the temperature difference becomes equal to or higher than a predetermined temperature, it may be determined that catalytic combustion has occurred.
[0041]
Further, as shown in FIG. 5 (a), in the second embodiment described above, the thermocouple 32 is provided in the inflow path of the air 40 flowing in from the secondary air inflow port 30, whereby the thermoelectric The effect of cooling the pair 32 can be obtained. And thereby, deterioration of the thermocouple 32 by heating can be suppressed.
[0042]
Further, as shown in FIG. 5B, in the second embodiment described above, a closing plate 45 (corresponding to the exhaust passage closing means of the present invention) is provided in the vicinity of the secondary air inlet 30. Thus, a vortex can be generated between the air 42 flowing in from the inlet 30 and the unburned gas 43 sent to the exhaust passage 15. Thereby, mixing with secondary air, unburned gas, etc. is accelerated | stimulated and it becomes easy to produce secondary combustion. Also in the third embodiment described above, by providing the closing plate 45, mixing of the secondary air and unburned gas can be promoted to facilitate catalytic combustion.
[0043]
Moreover, in the 2nd Embodiment and 3rd Embodiment which were mentioned above, although the air intake (31, 36) was provided in the lower surface of the heating cooker, as shown to Fig.6 (a), heating is carried out. You may provide the air intake 50 in the front surface of a cooking appliance.
[0044]
Further, in the second embodiment and the third embodiment described above, as shown in FIG. 6 (b), the air taken in from the air intake port 51 is allowed to pass through the inside of the heating cooker, and from the inlet 30. By flowing in, the effect of cooling the inside of the cooking device can be obtained.
[0045]
Further, as shown in FIGS. 7A and 7B, throttle portions 60 and 61 (corresponding to the exhaust passage closing means of the present invention) may be provided in the exhaust passage 15. Thereby, since the delivery speed of the unburned gas that has passed through the throttle portions 60 and 61 is increased and turbulent flow is likely to occur, mixing of the unburned gas and the secondary air can be promoted.
[0046]
Further, as shown in FIGS. 8A and 8B, the throttle portions 70 and 72 (corresponding to the exhaust passage closing means of the present invention) are disposed downstream of the secondary air inlets 71 and 73. By providing in, mixing of unburned gas etc. and combustion air can further be accelerated | stimulated.
[0047]
Further, as shown in FIGS. 9A and 9B, in the configuration shown in FIGS. 6A and 6B, the air intake 50 is connected to the secondary air inlet 30. Fans 80 and 81 may be provided in the air inflow path and in the air inflow path from the air intake 51 to the secondary air inlet 30. Thereby, since the flow rate of the air flowing in from the secondary air inflow ports 80 and 81 increases, the occurrence of secondary combustion can be promoted. In the configurations shown in FIGS. 3 to 5 and FIGS. 7 to 8 as well, a fan is provided in the inflow path of the secondary air to forcibly increase the flow rate of air flowing in from the inflow port. Generation of secondary combustion and catalytic combustion can be promoted.
[0048]
In the present embodiment, a thermocouple is used as the flame detecting means of the present invention, but other types of flame detecting elements such as a frame rod may be used. Further, although the thermocouple is used as the temperature detecting means of the present invention, other types of temperature detecting elements such as a thermistor may be used.
[0049]
Further, in the present embodiment, when incomplete combustion of the burner 2a is detected, both the supply of fuel gas to the burner 2a is stopped and the abnormality is notified. The effects of the invention can be obtained.
[0050]
Further, in the present embodiment, the secondary air inlets (30, 35) are provided on the lower surface of the exhaust passage 15, but a secondary air inlet may be provided on the side surface of the exhaust passage 15.
[0051]
In the present embodiment, the gas table 1 is shown in which all of the three burners 2a, 2b, 2c are housed in the combustion chamber having the glass plate 3 as a top plate. However, at least one burner is the glass plate 3 or the like. The present invention can be applied to any gas table housed in a combustion chamber having a top plate as a top plate.
[0052]
Further, in the present embodiment, the forced combustion type gas table in which the combustion air is supplied to the combustion chamber by the supply / exhaust fan 5 is shown, but the natural combustion type gas table not provided with the supply / exhaust fan is also shown. The present invention can be applied. Note that, in the forced combustion type gas table, as described above, the amount of heating to the cooked food is controlled by changing the amount of combustion of the burner by adjusting the flow rate of the fuel gas and combustion air supplied to the burner. On the other hand, in the natural combustion type gas table, the supply amount of fuel gas to the burner is constant, the combustion amount of the burner is kept constant, and so-called ON / OFF control for adjusting the burner combustion time per predetermined unit time is used for cooking. Control the amount of heating against
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heating cooker according to the present invention.
FIG. 2 is a configuration diagram of a heating cooker according to the embodiment related to the present invention and the first embodiment of the present invention .
FIG. 3 is a graph showing changes in thermocouple output voltage and CO concentration with respect to the primary air ratio.
FIG. 4 is a configuration diagram of a heating cooker according to second and third embodiments of the present invention.
FIG. 5 is an explanatory diagram of a flow path of unburned gas and secondary air in the second embodiment of the present invention.
FIG. 6 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 7 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 8 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 9 is a configuration diagram of a heating cooker according to second and third embodiments of the present invention.
FIG. 10 is a configuration diagram of a conventional cooking device.

Claims (6)

An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
An oxidation catalyst provided in the vicinity of the exhaust port; temperature detection means for detecting a temperature difference between the upstream side and the downstream side of the oxidation catalyst; and a temperature detected by the temperature detection means during combustion of the burner is equal to or higher than a predetermined temperature. And a combustion abnormality coping means for performing at least one of stoppage of fuel gas supply from the fuel gas supply means to the burner and abnormality notification vessel. An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
A secondary air inlet provided in the middle of the exhaust passage, flame detection means provided near the inlet for detecting a combustion flame, and secondary by the flame detection means during combustion of the burner Combustion abnormality countermeasure means for performing at least one of stoppage of fuel gas supply from the fuel gas supply means to the burner and notification of abnormality when a combustion flame due to combustion is detected. Characterized gas cooker. The gas cooker according to claim 2 , wherein the flame detection means is provided in a path through which air is introduced from an inlet of the secondary air. An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
A secondary air inlet provided in the middle of the exhaust passage, an oxidation catalyst provided in the vicinity of the inlet, temperature detection means provided in the vicinity of the oxidation catalyst, and the burner being in combustion In addition, when the temperature detected by the temperature detection means becomes equal to or higher than a predetermined temperature, a combustion abnormality countermeasure is performed in which at least one of the stoppage of fuel gas supply from the fuel gas supply means to the burner and the abnormality notification are performed. And a gas cooker. The gas cooker according to claim 4, wherein the temperature detecting means detects a temperature difference between an upstream side and a downstream side of the oxidation catalyst as the detected temperature. An exhaust passage downstream of the secondary air inlet of the exhaust passage to prevent mixing of the combustion exhaust of the burner and air flowing in from the secondary air inlet by preventing ventilation of the exhaust passage The gas cooker according to any one of claims 2 to 5 , wherein a closing means is provided.

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