JP6643097B2 - Cooking device - Google Patents

Description

  The present invention relates to a cooking device. In particular, the present invention relates to a heating cooker in which oven cooking is performed by circulating hot air in a heating chamber.

  Conventionally, a combustion chamber provided with an oven burner is provided separately from a heating chamber for accommodating the food, and the fuel gas supplied by the oven burner is burned to generate hot air of combustion exhaust gas, and the generated hot air is circulated. There has been proposed a heating cooker for indirectly heating and cooking an object to be cooked by feeding into a heating chamber with a fan and circulating the cooking object in the heating chamber (for example, Patent Document 1). In this type of heating cooker, during cooking, temperature adjustment may be performed by turning on and off the oven burner based on the temperature in the heating chamber, cooking time, and the like.

JP 2013-213649 A

  By the way, when the temperature control for lighting and extinguishing the oven burner is performed in the heating cooker as described above, since the user does not know the ignition timing of the oven burner, the user is working near the cooking device. The user may be surprised by an unexpected ignition sound. Also, if the open / close valve that supplies fuel gas to the oven burner has an open failure, if the stove burner is used while extinguishing the oven burner for temperature control, fuel gas is also supplied to the oven burner. Will be done. As a result, when the oven burner is ignited for temperature control, the ignition is performed in a state where the fuel gas is supplied to the oven burner before the ignition means such as an ignition electrode is operated, and a loud ignition sound or combustion occurs. There is a problem that a flame overflows from the room.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a heating cooker that controls the temperature in a heating chamber by igniting an oven burner. An object of the present invention is to provide a highly safe heating cooker.

The present invention
A combustion chamber provided with an oven burner that generates hot air by igniting and burning the fuel gas supplied by the ignition means,
Gas amount adjusting means capable of adjusting the supply amount of fuel gas supplied to the oven burner,
Ignition detection means for detecting the ignition of the oven burner,
A heating chamber for heating the food;
A circulation fan that sends hot air generated by the oven burner to the heating chamber and circulates the hot air,
A control device for controlling the temperature in the heating chamber by igniting the oven burner, and a cooking device comprising:
When the oven burner is ignited for performing the temperature adjustment, the gas supply amount to the oven burner is detected by the ignition detection means until the ignition of the oven burner is detected by the ignition detection means until the ignition of the oven burner is detected. In addition to limiting the supply amount of the predetermined temperature control ignition gas smaller than the predetermined supply amount of the temperature control gas after being performed, the rotation speed of the circulation fan and the ignition of the oven burner are detected by the ignition detection unit. Restricted to a predetermined temperature control ignition speed lower than the predetermined temperature control speed after,
Until a predetermined standby time elapses after the ignition detection means detects the ignition of the oven burner, the gas supply amount to the oven burner is limited to the temperature control ignition gas supply amount, and the circulation fan Limiting the number of revolutions to the temperature control ignition number of revolutions,
When the predetermined standby time has elapsed, the gas supply amount to the oven burner is increased from the temperature control ignition gas supply amount to the temperature control gas supply amount,
After a predetermined adjustment time has elapsed since the gas supply amount to the oven burner was increased to the temperature control gas supply amount, heating control having a control configuration for increasing the rotation speed of the circulating fan to the temperature control rotation speed is performed. It is a vessel.

  According to the heating cooker, when the oven burner is ignited for temperature control, the fuel gas supply amount is reduced by a small amount until the ignition detection means detects the ignition of the oven burner. Since the circulation fan is limited to a small amount and the circulation fan is limited to the low-speed rotation for temperature control ignition, not only the ignition noise can be reduced, but also poor ignition can be prevented.

Further , according to the heating cooker, the supply amount of the fuel gas is limited to a small amount of the supply gas for temperature control ignition until a predetermined standby time elapses after the ignition detection unit detects the ignition of the oven burner. At the same time, since the rotation speed of the circulation fan is limited to a low rotation speed for temperature control ignition, the gas supply amount can be increased after the combustion flame formed in the oven burner is stabilized, and the Poor ignition can be further reduced.
Further, according to the heating cooker, after a predetermined standby time has elapsed, the gas supply amount to the oven burner is increased from the temperature control ignition gas supply amount to the temperature control gas supply amount, but the temperature control gas supply amount is increased. After a predetermined adjustment time has elapsed since the increase, the number of revolutions of the circulation fan is increased to the number of revolutions for temperature control, and the amount of combustion air is increased from a state in which a large combustion flame is formed in the flame hole of the oven burner. You. Thereby, when the oven burner is ignited for temperature control, it is possible to further reduce the fluctuation and the ignition failure of the combustion flame.

In the heating cooker, preferably,
When extinguishing the oven burner to perform the temperature control, the rotation speed of the circulation fan is maintained at the temperature control rotation speed.

  If the rotation speed of the circulation fan is increased to the temperature adjustment rotation speed after the ignition of the oven burner in order to control the temperature, the amount of combustion air supplied to the oven burner increases. Therefore, if the rotation speed of the circulation fan is maintained at the temperature control rotation speed even while the oven burner is extinguished to perform temperature control, the combustion air amount is supplied to the oven burner by the temperature control gas supply amount and the fuel gas is supplied to the oven burner. It is about the same as when it is being supplied, and the temperature in the heating chamber can be reduced at an early stage. In addition, even when an open failure of the on-off valve occurs, the fuel gas is unlikely to stagnate in the combustion chamber, so that a loud ignition sound or flame overflow can be suppressed when the oven burner is ignited.

In the heating cooker, preferably,
If the rotation speed of the circulation fan is maintained at the temperature adjustment speed while the oven burner is extinguished to perform the temperature adjustment, the rotation speed of the circulation fan is reduced to the temperature adjustment ignition speed. After that, a fuel gas is supplied to the oven burner at the gas supply amount for temperature control ignition to ignite the oven burner.

  As described above, if the rotation speed of the circulation fan is maintained at the temperature control speed while the oven burner is extinguished to control the temperature, the amount of combustion air is supplied to the oven burner by the temperature control gas supply amount. It is almost the same as when gas is supplied. Therefore, when igniting the oven burner, if the fuel gas is supplied to the oven burner at a temperature control ignition gas supply amount smaller than the temperature control gas supply amount, the combustion air becomes larger than the supplied fuel gas, resulting in poor ignition. Tends to occur. However, according to the heating cooker, after reducing the rotation speed of the circulating fan to the rotation speed for temperature control ignition, the fuel gas is supplied to the oven burner at a supply amount of the gas for temperature control ignition, and the oven burner is ignited. Therefore, the oven burner can be ignited smoothly.

  As described above, according to the present invention, the amount of fuel gas supplied when the oven burner is ignited for adjusting the temperature in the heating chamber is reduced, so that the ignition sound is reduced. Accordingly, even if the oven burner is ignited at a timing unexpected by the user, the user is not surprised by the ignition sound. Further, even if the open / close valve for supplying the fuel gas to the oven burner has an open failure, it is possible to prevent generation of a loud ignition sound and flame overflow from the combustion chamber. Therefore, according to the present invention, it is possible to provide a highly safe heating cooker that is convenient for the user.

FIG. 1 is a schematic perspective sectional view showing an example of the heating cooker according to the embodiment of the present invention. FIG. 2 is a schematic perspective view showing an example of the combustion chamber of the heating cooker according to the embodiment of the present invention. FIG. 3 is a circuit diagram illustrating an example of the heating cooker according to the embodiment of the present invention. FIG. 4 is a time chart illustrating an example of a control operation in the heating cooker according to the embodiment of the present invention. FIG. 5 is a flowchart illustrating an example of a control operation in the heating cooker according to the embodiment of the present invention.

Hereinafter, the heating cooker according to the present embodiment will be specifically described with reference to the drawings.
FIG. 1 shows a case where a cooking device according to an embodiment of the present invention is applied to a gas stove 1 having an oven function. Is provided. Further, a front door 12 for closing the front opening 100 of the heating chamber 10 is provided on the front part 111 of the main body case 11. Further, at the position behind the front door 12 and near the lower end of the front surface portion 111 of the main body case 11, the circulation fan 14 is rotated by the motor 50 so that air outside the main body is used as combustion secondary air as combustion secondary air. A plurality of air inlets 112 for taking in the inside are provided. In addition, in this specification, the front part 111 of the main body case 11 is the front of the gas stove 1, and the depth direction of the main body case 11 when the gas stove 1 is viewed from the front side is the front-rear direction, the width direction is the left-right direction, and the height direction. Is called up and down direction.

  A combustion chamber 20 in which an oven burner 13 is accommodated is provided in a space between the opposed bottom walls of the heating chamber 10 and the main body case 11 in a space below the heating chamber 10 in the main body case 11. In a space behind the heating chamber 10 in the main body case 11, a hot air passage 30 for guiding hot air of the combustion exhaust gas discharged from the oven burner 13 into the combustion chamber 20 to the suction port 141 of the circulation fan 14 is provided. I have. Further, an exhaust passage 31 that guides the air in the heating chamber 10 to the outside of the main body case 11 is provided in a rear part of the main body case 11 above the heating chamber 10.

  The heating chamber 10 includes an upper wall 10A constituting an upper surface, a bottom wall 10B constituting a bottom surface, a left wall 10C constituting a left side surface, a right side wall (not shown) constituting a right side surface, and a rear surface constituting a rear surface. The rear wall 10E is formed in a substantially rectangular box shape that opens forward.

  At a position near the rear of the upper wall 10A of the heating chamber 10, a ventilation hole 101 connected to the exhaust passage 31 is opened, and a part of the hot air sent into the heating chamber 10 by the circulation fan 14 is Along with the oily smoke and odor components generated from the air, the air is guided from the vent hole 101 to the exhaust port 311 at the downstream end through the exhaust passage 31 and discharged to the outside of the main body case 11. The exhaust passage 31 is provided with a temperature sensor 60 for detecting an exhaust gas temperature discharged from the heating chamber 10 and flowing through the exhaust passage 31, and a detection signal detected by the temperature sensor 60 is output to a control device C described later. You.

  At a position on the left and right sides of the center of the back wall 10E of the heating chamber 10, a hot air outlet 102 is opened which is connected to an outlet (not shown) of the circulation fan 14. Further, a hot air introduction hole 103 connected to the hot air passage 30 is formed at a central position of the back wall 10E of the heating chamber 10. Therefore, when the circulation fan 14 is driven to rotate, the hot air discharged from the oven burner 13 into the combustion chamber 20 is drawn into the suction port 141 through the hot air passage 30 and then into the heating chamber 10 from the hot air outlet 102. Sent in. A part of the hot air sent into the heating chamber 10 is sucked into the suction port 141 from the hot air introduction hole 103 through the hot air passage 30, and is sent again into the heating chamber 10 through the hot air outlet hole 102.

  As shown in FIG. 2, the combustion chamber 20 includes an upper wall 20A constituting an upper surface, a bottom wall 20B constituting a bottom surface, a left wall 20C constituting a left side surface, and a right wall 20D constituting a right side surface. It is formed in a substantially rectangular box shape that opens forward by an inner wall 20 </ b> E constituting a rear surface, and the oven burner 13 is incorporated in the combustion chamber 20 at a substantially central position in the front-rear direction. The air supply port 112 is provided in the front opening 21 of the combustion chamber 20, and by rotating the circulating fan 14, the air outside the main body is supplied as secondary air for combustion of the oven burner 13. From 112, it is taken into the combustion chamber 20.

  At a position near the center rear of the upper wall 20A of the combustion chamber 20, a communication port 22 connecting the combustion chamber 20 and the hot air passage 30 is opened, and the hot air discharged from the oven burner 13 into the combustion chamber 20 is: The air is led to the hot air passage 30 through the communication port 22.

  The oven burner 13 is a tube formed by bending a single pressed plate, and has a predetermined gap between the upper wall 20A and the bottom wall 20B of the combustion chamber 20, as shown in FIG. It is arranged. Therefore, the external air taken into the combustion chamber 20 from the air inlet 112 passes through the upper and lower gaps of the oven burner 13 and is guided to the periphery of the flame hole 130 formed on the rear end face of the oven burner 13.

  As shown in FIG. 2, the oven burner 13 is formed in a substantially rectangular shape that is long in the left and right directions when viewed from above, and a plurality of flame holes 130 are arranged in the rear end face at predetermined intervals in the left and right direction. ing. Further, a gas supply port 131 is provided at one side end (here, right end) of the oven burner 13. Although not shown, a gas ejection nozzle is provided facing the outside of the gas supply port 131, and fuel gas ejected from the gas ejection nozzle is provided around the gas supply port 131, which is primary air for combustion. The air is sent into the oven burner 13 together with the air, and is ejected rearward from each of the flame holes 130 in a planar shape.

  A flame rod 15 is provided on the left side wall 20C of the combustion chamber 20 at a position behind the arrangement of the oven burner 13 and near the flame hole 130 as ignition detection means for detecting the presence or absence of a combustion flame behind the flame hole 130. Have been. The detection signal detected by the frame rod 15 is output to a control device C described later. On the other hand, on the right side wall 20D of the combustion chamber 20, behind the portion where the oven burner 13 is provided and at a position near the flame hole 130, an ignition electrode 16 as an ignition means is provided. It should be noted that a thermocouple type detecting means for detecting from the electromotive force due to the heat of the combustion flame may be used as the ignition detecting means.

  Returning to FIG. 1, a cooling fan 18 provided coaxially with the circulation fan 14 via a partition wall and a motor 50 for rotating and driving the circulation fan 14 and the cooling fan 18 are disposed behind the circulation fan 14. ing.

  FIG. 3 is a circuit diagram of the gas stove 1 of the present embodiment. The control device C controls not only the oven burner 13 but also the combustion of the stove burner, but only the oven burner 13 will be described below. A branch pipe L1 branched from the gas supply pipe L is connected to the oven burner 13, and a main valve 403 for supplying and stopping the fuel gas to the stove burner and the oven burner 13 is provided in the gas supply pipe L. Have been. Further, the branch pipe L1 is provided with a governor G, a heating power switching plate 404 that adjusts an orifice by operating a stepping motor (not shown) as a gas amount adjusting means to change the flow rate of fuel gas, and a solenoid valve 405 as an on-off valve. Have been. Therefore, by opening and closing the main valve 403 and the electromagnetic valve 405, the fuel gas is supplied to the oven burner 13 and stopped. In addition, while the main valve 403 and the solenoid valve 405 are opened, the supply amount of the fuel gas to the oven burner 13 is changed by adjusting the orifice of the thermal power switching plate 404 with a stepping motor. The operations of the main valve 403, the solenoid valve 405, and the stepping motor are controlled according to a signal from the control device C.

  In the control device C, the frame rod 15, the motor 50, the temperature sensor 60, the fire extinguishing switch 70, the igniter 80, the main valve 403, the solenoid valve 405, the stepping motor, the operation unit 700, and the like described above are connected via electric wiring. Connected.

  The operation unit 700 includes a cooking mode selection switch 702 for performing manual cooking and automatic cooking according to the type of cooking, a cooking menu switch 703 for selecting a type of cooking such as fish dishes, and a temperature setting for setting a cooking temperature. A switch 704 and the like are provided.

  The control device C is an electronic unit including a CPU, a ROM, a RAM, and the like, and operates with power supplied from the power supply circuit 900. In addition, the control device C executes heating and cooking on the object to be cooked according to a predetermined control program in accordance with the operation of the operation unit 700 by the user. Although not shown, the control device C includes a motor drive circuit, a switch circuit, an igniter circuit, a solenoid valve drive circuit, a frame rod circuit, a thermistor circuit, a timer circuit, etc., for performing oven cooking in accordance with the operation of the operation unit 700. It has. Further, the memory of the control device C stores a control program corresponding to each cooking, a data table of a drive current value of the motor 50 and a rotation speed of the circulation fan 14, and the like.

Next, an example of a control operation in the case of performing oven cooking while performing temperature adjustment with the gas stove according to the present embodiment will be described with reference to FIGS. 4 and 5.
When the user turns on a power switch (not shown), power is supplied from the power supply circuit 900, and the control device C is activated (step ST1 in FIG. 5). Then, in order to start oven cooking, the user selects a cooking mode, a type of cooking, and the like by using the operation unit 700 and operates the ignition switch 70 (step ST2 in FIG. 5). By driving the circulating fan 14, the circulating fan 14 is driven to rotate at a predetermined initial rotational speed Rs (for example, 1000 rpm) ((a) in FIG. 4 and step ST3 in FIG. 5). As described above, by rotating the circulation fan 14 before the fuel gas is supplied to the oven burner 13, even when the solenoid valve 405 has an open failure, the stagnation of the fuel gas in the combustion chamber 20 is reduced. Therefore, it is possible to prevent generation of a loud ignition sound and flame overflow when the oven burner 13 is ignited.

  Although not shown in FIG. 4, when a predetermined rotation speed stabilization time (for example, 7.5 seconds) in which the rotation of the circulation fan 14 is stabilized has elapsed after the point fire switch 70 was operated (step in FIG. 5). In ST4, Yes), the opening degree of the thermal power switching plate 404 is set so that the supply amount of the fuel gas at the time of ignition of the oven burner 13 becomes the initial ignition gas supply amount Vs (for example, 1000 kcal / h). The degree is adjusted to Gs (for example, the opening degree is small) (step ST5 in FIG. 5).

  Next, when a predetermined adjustment time (for example, 1 second) in consideration of the time when the opening of the thermal power switching plate 404 is changed (for example, 1 second) has elapsed (Yes in step ST6 of FIG. 5), the main valve 403 is opened, and furthermore, When a predetermined valve opening time (for example, 0.1 second) in consideration of the time during which the main valve 403 is opened has elapsed, energization of the igniter 80 is started, and the igniter 80 causes a spark discharge in the ignition electrode 16. Then, when a predetermined initial energization time (for example, 0.2 seconds) elapses after the energization of the igniter 80 is started, the solenoid valve 405 is opened ((b) to (d) of FIG. 4 and FIG. 5 Steps ST7 to ST11). Thus, the supply of the fuel gas to the oven burner 13 is started at the initial ignition gas supply amount Vs. Then, when the fuel gas ejected from the flame hole 130 of the oven burner 13 is ignited by the spark discharge from the ignition electrode 16 and the combustion flame is detected by the flame rod 15 ((e) in FIG. 4), the igniter 80 is turned on. Is stopped (steps ST12 to ST13 in FIG. 5).

  When the combustion flame is detected by the flame rod 15 and a predetermined combustion flame stabilization time (for example, 6 seconds) elapses (Yes in step ST14 of FIG. 5), the opening of the thermal power switching plate 404 is turned on. By adjusting the opening degree Gy (for example, the opening degree is large), the supply amount of the fuel gas to the oven burner 13 is increased to a predetermined temperature control gas supply amount Vy (for example, 2500 kcal / h) (FIG. f) and step ST15 in FIG. Then, when a predetermined adjustment time (for example, 0.3 seconds) in consideration of the time when the opening of the thermal power switching plate 404 is changed (for example, 0.3 seconds) elapses (Yes in step ST16 of FIG. 5), the motor 50 is driven. Then, the rotation speed of the circulation fan 14 is increased to a predetermined temperature adjustment rotation speed Ry (for example, 3000 rpm) ((g) in FIG. 4 and step ST17 in FIG. 5). As described above, by increasing the amount of combustion air from a state in which a large combustion flame is formed in the flame hole 130 of the oven burner 13, the fluctuation of the combustion flame and poor ignition can be further reduced.

  When the temperature adjustment is started as described above and the temperature in the heating chamber 10 detected by the temperature sensor 60 rises to a predetermined upper limit temperature (Yes in step ST18 in FIG. 5), the solenoid valve 405 is closed. ((H) in FIG. 4 and step ST19 in FIG. 5), the oven burner 13 is extinguished, but the rotation speed of the circulation fan 14 is maintained at the rotation speed Ry for temperature control. Thereby, the air taken into the combustion chamber 20 from the outside is quickly sent into the heating chamber 10, and the temperature in the heating chamber 10 can be reduced in a short time.

  When the oven burner 13 has been extinguished and a predetermined valve closing time has elapsed (Yes in step ST20 of FIG. 5), the supply amount of fuel gas when the next oven burner 13 is ignited is changed to the supply amount of the temperature control ignition gas. In advance, the opening of the thermal power switching plate 404 is adjusted to the temperature control ignition opening Gw (for example, the opening is small) so as to be Vw (for example, 1000 kcal / h) ((i) in FIG. 4 and FIG. 5). Step ST21). Thus, even when the solenoid valve 405 is opened at the next ignition of the oven burner 13, a large amount of fuel gas can be prevented from being supplied to the oven burner 13. Further, when cooking is started with a stove burner (not shown) in a state where the solenoid valve 405 has an open failure, fuel gas is also supplied to the oven burner 13, but the opening degree of the thermal power switching plate 404 is reduced. Therefore, not only can the supply amount of the fuel gas supplied when the oven burner 13 is extinguished be reduced, but also because the rotation speed of the circulation fan 14 is maintained at the temperature adjustment rotation speed Ry, the fuel gas in the combustion chamber 20 can be reduced. Stagnation is suppressed, and it is possible to prevent generation of a loud ignition sound or flame overflow when the oven burner 13 is ignited.

  When the temperature in the heating chamber 10 detected by the temperature sensor 60 decreases to a predetermined lower limit temperature (Yes in step ST22 of FIG. 5), the motor 50 is driven before the solenoid valve 405 is opened to circulate. The rotation speed of the fan 14 is reduced to the rotation speed Rw for temperature control ignition (for example, 1000 rpm) ((j) in FIG. 4 and step ST23 in FIG. 5). Next, when a predetermined rotation speed stabilization time (for example, 7.5 seconds) at which the rotation speed of the circulation fan 14 is stabilized has elapsed (Yes in Step ST24 of FIG. 5), the igniter 80 is supplied to the igniter 80 similarly to the initial ignition. When the energization is started, a spark discharge is generated in the ignition electrode 16 by the igniter 80, and the energization of the igniter 80 is started. The valve is opened ((k) to (l) in FIG. 4 and steps ST9 to ST11 in FIG. 5). Then, since the opening degree of the heating power switching plate 404 is reduced, the fuel gas is supplied to the oven burner 13 at the temperature control ignition gas supply amount Vw. Then, when the fuel gas ejected from the flame holes 130 of the oven burner 13 is ignited and the combustion flame is detected by the flame rod 15 ((m) in FIG. 4), the power supply to the igniter 80 is stopped (FIG. 5). Steps ST12 to ST13).

  Next, as in the case of the initial ignition, the combustion flame is detected by the flame rod 15, and a predetermined combustion flame stabilization time (standby time) (for example, 6 seconds) elapses (Yes in step ST14 in FIG. 5). Then, the opening degree of the heating power switching plate 404 is adjusted to the opening degree Gy for turning on the temperature, and the supply amount of the fuel gas to the oven burner 13 is increased to a predetermined supply amount Vy for the temperature adjusting gas ((n) in FIG. 4). And step ST15 in FIG. 5). Then, when a predetermined adjustment time in consideration of a time during which the opening degree of the thermal power switching plate 404 is changed elapses, the motor 50 is driven to increase the rotation speed of the circulation fan 14 to a predetermined temperature adjustment rotation speed Ry ( (O) in FIG. 4 and step ST17 in FIG. 5). Thus, the temperature adjustment for increasing the temperature in the heating chamber 10 is restarted.

  The temperature adjustment by causing the oven burner 13 to extinguish the fire is performed, for example, until a predetermined cooking time has elapsed.

  As described above in detail, the gas stove 1 having the combustion chamber 20 in which the oven burner 13 is provided separately from the heating chamber 10 in which the object to be cooked is stored. When the ignition is performed, a small amount of the temperature control ignition gas is supplied to the oven burner 13, so that the ignition noise can be reduced. For example, in the gas stove 1, the ignition sound when the oven burner 13 is ignited with the supply gas for temperature control is 75 dB, whereas the supply gas for control gas for ignition is driven by the motor 50. It could be reduced to about 45 dB, which is about the same as the instrument sound. Therefore, even if the oven burner 13 is ignited at a timing unexpected by the user, it is possible to prevent the user from being surprised by the ignition sound. Further, when the oven burner 13 is ignited for temperature adjustment, the number of revolutions of the circulation fan 14 is reduced to the number of revolutions for temperature control ignition in accordance with the supply amount of gas for temperature control ignition. Further, even if the solenoid valve 405 fails to open when the oven burner 13 extinguishes, the opening degree of the thermal power switching plate 404 is reduced, so that fuel gas stagnating in the combustion chamber 20 can be reduced. Therefore, it is possible to prevent a loud ignition sound and flame overflow when the oven burner 13 is ignited. In addition, in the gas stove 1, even when the oven burner 13 is extinguished, the circulation fan 14 is driven to rotate at a high rotation speed for temperature control. Stagnation of fuel gas can be further reduced. Therefore, the ignition sound when the oven burner 13 is ignited can be suppressed, and the overflow of the flame from the combustion chamber 20 can be reduced. In the gas stove, when the oven burner 13 is ignited for temperature control, the rotation speed of the circulation fan 14 is reduced to the temperature control ignition rotation speed, and then a small amount of temperature control ignition gas is supplied to the oven burner 13. Since ignition is performed by supplying the fuel gas in an amount, poor ignition can be further reduced.

  Therefore, according to the present embodiment, it is possible to provide a highly safe heating cooker that is convenient for the user. In the above embodiment, the supply amount of the fuel gas and the rotation speed of the circulation fan 14 when the oven burner 13 is ignited for the initial ignition and temperature adjustment are the same, but these are different supply amounts and rotation speeds. It may be. In the above-described embodiment, the supply amount of the fuel gas to the oven burner 13 is changed by providing the branch pipe L1 with the heating power switching plate 404 for adjusting the orifice by the stepping motor. Alternatively, the supply amount of fuel gas to the oven burner 13 may be changed by connecting the upstream side and the downstream side of the electromagnetic valve 405 by a bypass pipe provided with an orifice and opening and closing the electromagnetic valve 405.

Reference Signs List 10 heating chamber 13 oven burner 20 combustion chamber 14 circulation fan 15 flame rod (ignition detection means)
16 Ignition electrode (ignition means)
405 Thermal power switching plate (gas amount adjusting means)
C control device

Claims (3)

A combustion chamber provided with an oven burner that generates hot air by igniting and burning the fuel gas supplied by the ignition means,
Gas amount adjusting means capable of adjusting the supply amount of fuel gas supplied to the oven burner,
Ignition detection means for detecting the ignition of the oven burner,
A heating chamber for heating the food;
A circulation fan that sends hot air generated by the oven burner to the heating chamber and circulates the hot air,
A control device for controlling the temperature in the heating chamber by igniting a fire in the oven burner,
When the oven burner is ignited for performing the temperature control, the gas supply amount to the oven burner is detected until the ignition of the oven burner is detected by the ignition detection unit until the ignition detection unit detects the ignition of the oven burner. In addition to limiting the supply amount of the predetermined temperature control ignition gas smaller than the predetermined supply amount of the temperature control gas after being performed, the rotation speed of the circulation fan and the ignition of the oven burner are detected by the ignition detection unit. Limiting to a predetermined temperature control ignition speed lower than the predetermined temperature control speed after,
Until a predetermined standby time elapses after the ignition detection means detects the ignition of the oven burner, the gas supply amount to the oven burner is limited to the temperature control ignition gas supply amount, and the circulation fan Limiting the number of revolutions to the temperature control ignition number of revolutions,
When the predetermined standby time has elapsed, the gas supply amount to the oven burner is increased to the temperature control gas supply amount,
After a predetermined adjustment time has elapsed since the gas supply amount to the oven burner was increased to the temperature control gas supply amount, heating control having a control configuration for increasing the rotation speed of the circulating fan to the temperature control rotation speed is performed. vessel. The cooking device according to claim 1 ,
A heating cooker for maintaining the rotation speed of the circulation fan at the rotation speed for temperature control when extinguishing an oven burner to perform the temperature control. The cooking device according to claim 2 ,
While maintaining the rotation speed of the circulation fan at the rotation speed for temperature control while extinguishing the oven burner to perform the temperature control, reduce the rotation speed of the circulation fan to the rotation speed for temperature control ignition. After that, a heating cooker for supplying the fuel gas to the oven burner at the supply amount of the gas for temperature control ignition to ignite the oven burner.

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