JP6921709B2 - Cooker - Google Patents

Description

The techniques disclosed herein relate to cookers.

Patent Document 1 discloses a burner for heating an object to be heated by using gas, and a heating cooker provided with a control means for adjusting a gas supply amount to control the thermal power of the burner. The cooking device of Patent Document 1 is a so-called gas stove. In Patent Document 1, the size of the object to be heated is determined from above the object to be heated, the thermal power of the burner is reduced when the flame protrudes to the outside of the object to be heated, and the state in which the flame protrudes from the object to be heated is eliminated. doing.

Japanese Unexamined Patent Publication No. 2010-14342

In Patent Document 1, the waste of heat energy is suppressed by eliminating the protrusion of the flame from the object to be heated, and the safety is ensured by preventing the flame from coming into contact with the user. Since the gas stove is a device that cooks using flames, it needs to be constantly improved to ensure cookability and safety. It is an object of the present specification to disclose a cooking cooker based on an unprecedented technical idea, and to provide a cooking cooker having excellent cookability and safety.

The cooking cooker disclosed in the present specification may include a burner, a control means, a contour detecting means, and a flame detecting means. The burner may use gas to heat the object to be heated. The control means may control the thermal power of the burner by adjusting the gas supply amount. The contour detecting means may detect the contour of the object to be heated from above the object to be heated. The flame detecting means may detect whether or not the flame protrudes from above the object to be heated to the outside of the contour of the object to be heated. In this cooking device, when the flame detecting means detects a flame protruding outside the contour of the object to be heated, the outer edge of the flame is located inside the contour of the object to be heated by a predetermined distance. As such, the gas supply may be reduced.

In the above-mentioned cooking cooker, not only the outer edge (outer shell) of the flame is suppressed from protruding from the contour of the heating target portion, but also the gas is supplied so that the outer edge of the flame is located inside a predetermined distance from the contour of the heating target. Adjust the amount (burner firepower). That is, a space (predetermined distance) can be reliably provided between the space outside the object to be heated (outside the contour) and the flame. It should be noted that simply adjusting the thermal power so that the flame does not protrude from the contour of the object to be heated may cause the temperature of the outer space of the object to be heated to become high, and safety may not be ensured. Further, if the gas supply amount is reduced too much (heat power is reduced) in order to suppress the protrusion of the flame, the cookability is lowered. In the heating cooker, the outer edge of the flame is maintained at a position separated from the contour of the object to be heated by a predetermined distance. That is, the above-mentioned cooking cooker secures a certain amount of heating power and suppresses the heating power from being lowered too much. As a result, the above-mentioned cooker can ensure cookability while ensuring safety. The "predetermined distance" may be a fixed value or a value (ratio to the size of the heating object) that varies depending on the size of the heating object (distance from the center of the burner to the contour). ..

When the flame detecting means detects a flame protruding outside the contour of the object to be heated, the control means reduces the gas supply amount so that the outer edge of the flame overlaps the contour of the object to be heated, and further, the flame is The gas supply amount when the outer edge overlaps the contour of the object to be heated may be set as the reference supply amount, and the gas supply amount may be reduced by a predetermined amount from the reference supply amount. By performing such control, it is possible to surely provide a space (predetermined distance) between the contour of the object to be heated and the outer edge of the flame, and it is possible that the heating power is excessively reduced (cookability is deteriorated). It can be suppressed.

Further, when the flame detecting means detects a flame protruding outside the contour of the object to be heated, the control means sets a high temperature region in a predetermined range outside the outer edge of the flame to reduce the gas supply amount. The flame outside the contour of the object to be heated is reduced to create a relational expression between the change in gas supply and the change in flame size, and the outer edge of the high temperature region is located inside the contour of the object to be heated based on the relational expression. The gas supply may be reduced as such. The "high temperature region" is set to a range in which combustibles can be burned by the heat of the flame. Even if such control is performed, it is possible to surely provide a gap between the contour of the object to be heated and the outer edge of the flame, and it is possible to prevent the thermal power from being excessively reduced.

The heating cooker may further include a temperature sensor that detects the temperature of the object to be heated. In this case, when the temperature sensor detects a temperature equal to or higher than a predetermined temperature when the burner is ignited, the outline of the object to be heated is detected when the flame detecting means detects a flame protruding outside the outline of the object to be heated. The gas supply amount may be reduced so that the distance from the flame to the outer edge of the flame becomes the first predetermined distance smaller than the above-mentioned predetermined distance. If the detection value of the temperature sensor is above the specified temperature when the burner is ignited (the object to be heated is above the specified temperature), the user has interrupted cooking and then resumed cooking, or the burner has unintentionally misfired. In many cases, cooking is in progress, such as when the burner is reignited. In such a case, the user's awareness of flame (danger awareness) is high, and the user does not easily approach the object to be heated. Therefore, in such a case, it is not necessary to excessively reduce the thermal power of the burner even if the flame protrudes from the object to be heated. If the flame squeezes out during cooking, the cookability can be maintained by suppressing the amount of decrease in the heating power more than usual.

In the above-mentioned heating cooker, when the flame detecting means detects a flame protruding outside the contour of the heating target between the start of ignition of the burner and the elapse of the first predetermined time, the flame is detected from the contour of the heating target. The gas supply amount may be reduced so that the distance to the outer edge of the flame becomes a second predetermined distance larger than the above-mentioned predetermined distance. Immediately after the start of ignition of the burner (start of cooking), the user's awareness of the flame (danger awareness) is low, and the user tends to approach the object to be heated, and as a result, approach the flame. If the flame protrudes from the object to be heated for a while (before the first predetermined time elapses) from the start of cooking, the heating power is greatly reduced compared to after that (after the first predetermined time elapses) to ensure safety. Can be further improved.

In the above-mentioned heating cooker, when the burner is ignited while using another burner or before the second predetermined time elapses after the ignition of the burner is completed, the flame detecting means is outside the contour of the object to be heated. When the protruding flame is detected, the gas supply amount may be reduced so that the distance from the contour of the object to be heated to the outer edge of the flame becomes a third predetermined distance smaller than the above-mentioned predetermined distance. While using another burner, or for a while (before the second predetermined time elapses) after the end of ignition of the burner (after the end of the previous cooking), the user is highly aware of the flame (danger awareness) and uses it. The person does not easily approach the object to be heated. Therefore, even in such a case, it is not necessary to excessively reduce the thermal power of the burner even if the flame protrudes from the object to be heated. Further, when the user is highly conscious of the flame, even if the flame protrudes from the object to be heated, the cooking property can be maintained by suppressing the decrease in the heating power more than usual. In addition, "ignite the burner before the second predetermined time elapses after the ignition of the burner is completed" means that the same burner as the burner that has been ignited is reignited within the second predetermined time, and the ignition is completed. This includes both cases where a burner different from the burner used is ignited within the second predetermined time. In both cases, the user is highly aware of the flame because the second predetermined time has not passed since the end of ignition of the burner.

The perspective view of the cooking apparatus is shown. The front view of the cooking apparatus and the range hood is shown. A block diagram of a control configuration of a cooking device is shown. The flowchart of the first thermal power adjustment process is shown. It shows the change of flame due to the first thermal power adjustment process. The flowchart of the second thermal power adjustment processing is shown. It shows the change in the high temperature region in the second thermal power adjustment process. The method of determining the target thermal power in the second thermal power adjustment process is shown.

The cooking device 2 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the heating cooker 2 is a gas combustion type built-in stove used by being incorporated in a system kitchen. The cooking cooker 2 includes a main body 4 whose front surface 4a is exposed to the front side of the system kitchen, and a top plate 6 which is arranged above the main body 4 and is exposed to the counter top of the system kitchen. The top plate 6 is provided with three trivets 8a, 8b, and 8c that support cooking containers such as pots and frying pans, which are objects to be heated. Further, corresponding to the respective trivets 8a, 8b, 8c, stove burners 10a, 10b, 10c for heating the object to be heated supported by the respective trivets 8a, 8b, 8c are provided. Further, sensors 12a, 12b, 12c are provided corresponding to the stove burners 10a, 10b, 10c.

A gas supply path (not shown) is connected to each of the stove burners 10a, 10b, and 10c arranged adjacent to each other. The gas supply path is provided with a flow rate adjusting valve (not shown) for adjusting the amount of gas supplied to the stove burner 10a. The stove burner 10a is ignited by operating an igniter (not shown) while the gas is being supplied to the stove burner 10a. By adjusting the amount of gas supplied to the stove burner 10a, the heating amount of the stove burner 10a can be adjusted. Further, the fire of the stove burner 10a is extinguished by stopping the supply of gas to the stove burner 10a. The stove burners 10b and 10c have the same structure as the stove burner 10a.

The main body 4 includes a grill storage 20 provided inside the main body 4 to store foodstuffs, and a grill door 22 arranged on the front surface 4a of the main body 4 to open and close the grill storage 20. Further, the main body 4 includes a stove operation unit 24 provided on the right side of the grill door 22 on the front surface 4a of the main body 4, and a grill operation unit 26 provided on the left side of the grill door 22 on the front surface 4a of the main body 4. .. Inside the grill storage 20, a grill burner (not shown) for heating the foodstuffs housed in the grill storage 20 is provided. In the cooking cooker 2, the front surface 4a of the main body 4 and the upper surface of the top plate 6 form an outer surface exposed to the user. In the following description, when explaining common features of a plurality of parts having substantially the same configuration, such as "Gotoku 8a, 8b, 8c", the reference number alphabet is omitted, for example, "Gotoku 8". May be explained.

Sensors 12 (12a to 12c) are provided corresponding to each stove burner 10 (10a to 10c). The sensor 12 detects the presence of the object to be heated and also detects the temperature of the object to be heated. When the object to be heated is placed on the stove burner 10, the sensor 12 can detect the object to be heated. When the object to be heated is placed on the stove burner 10, the sensor 12 is pressed by the object to be heated. The sensor 12 detects that the object to be heated is placed on the stove burner 10 when pressed by the object to be heated. When the object to be heated is not arranged on the stove burner 10, the sensor 12 is not pressed. A thermocouple is arranged in the sensor 12 and can detect the temperature of the object to be heated.

The stove operation unit 24 includes a power switch 40 of the cooking cooker 2, three heating amount operation units 42a, 42b, 42c, and a panel operation unit 44. The heating amount control units 42a, 42b, and 42c correspond to the stove burners 10a, 10b, and 10c, respectively. Further, each of the heating amount control units 42a, 42b, 42c is surrounded by LED light emitting units 43a, 43b, 43c capable of emitting blue or red light, respectively. The heating amount operating unit 42 is an operating unit for igniting and extinguishing the stove burner 10 and adjusting the heating amount of the stove burner 10. The heating amount control unit 42 is an alternate type switch. When the user executes an operation for moving the heating amount operating unit 42 from the fire extinguishing position to the ignition position (hereinafter referred to as “ignition operation”), the stove burner 10 is ignited, and the heating amount operating unit 42 is ignited by the user. When an operation for moving the stove from the ignition position to the fire extinguishing position (hereinafter referred to as "fire extinguishing operation") is executed, the stove burner 10 is extinguished. The ignition position is a position where the front surface of the heating amount operating unit 42 protrudes forward from the front surface 4a of the main body 4, and the fire extinguishing position is a position where the heating amount operating unit 42 is housed in the main body 4. be. Further, the user adjusts the amount of gas supplied to the stove burner 10 by operating the heating amount operating unit 42 clockwise or counterclockwise while the heating amount operating unit 42 is located at the ignition position. , The heating amount of the stove burner 10 (hereinafter, may be referred to as "thermal power") can be adjusted.

The panel operation unit 44 includes a display unit 46, heating temperature operation units 48a and 48b, automatic cooking selection operation units 50a and 50b, a recipe selection operation unit 54, and a cooking state operation unit 56. The display unit 46 displays the operating state of the stove burner 10. The heating temperature operation unit 48 is an operation unit for setting the temperature (for example, 180 ° C.) of the object to be heated to be heated by the stove burner 10. The automatic cooking selection operation unit 50 is an operation unit for selecting cooking in the automatic cooking mode using the stove burner 10. The recipe selection operation unit 54 is an operation unit for selecting a recipe to be cooked in the automatic cooking mode. The cooking state operation unit 56 is an operation unit for adjusting the state of the ingredients cooked in the automatic cooking mode, for example, the degree of baking.

The grill operation unit 26 includes a heating amount operation unit 60 and a panel operation unit 62. The heating amount control unit 60 is surrounded by an LED light emitting unit 61 capable of emitting blue or red light. By operating the heating amount control unit 60, the user can ignite and extinguish the grill burner and adjust the heating amount of the grill burner (hereinafter, may be referred to as "heat power"). The structure of the heating amount operating unit 60 is the same as that of the heating amount operating unit 42 of the stove operating unit 24.

The panel operation unit 62 includes a display unit 64, an automatic cooking selection operation unit 66, a recipe selection operation unit 68, and a cooking state operation unit 70. The display unit 64 displays the operating state of the grill burner and the like. The functions of the automatic cooking selection operation unit 66, the recipe selection operation unit 68, and the cooking state operation unit 70 are the automatic cooking selection operation unit 50, the recipe selection operation unit 54, respectively, except that the operation unit corresponds to the grill burner. It has the same function as the cooking state operation unit 56.

As shown in FIG. 2, a range hood 30 is provided above the cooking cooker 2. Further, cameras 80a, 80b, 80c are arranged at positions corresponding to the stove burners 10a, 10b, 10c of the range hood 30, respectively. Note that FIG. 2 shows only the cameras 80a and 80b corresponding to the stove burners 10a and 10b, and the illustration of the camera 80c is omitted. The camera 80 photographs the heating object (for example, a pot or a frying pan) 32 arranged on the trivet 8 from above, and detects the contour 32a of the heating object 32. The camera 80 is a part of the cooking device 2 and is an example of the contour detecting means and the flame detecting means. By detecting the flame of the object to be heated 32 from the image taken by the camera 80, it is possible to detect the presence or absence of the flame protruding from the object to be heated 32. The camera 80 continuously detects the contour of the object to be heated 32 and the flame around the object to be heated 32 while the cooker 2 is being used.

FIG. 3 shows a control configuration of the cooking cooker 2. The cooking cooker 2 includes a control unit 110 and a memory 120. The control unit 110 controls the operation of each component of the cooking cooker 2. The control unit 110 is an example of control means. The control unit 110 executes various processes according to the program stored in the memory 120. The memory 120 is composed of a volatile memory, a non-volatile memory, and the like. The memory 120 also stores the past usage history of the stove burner 10 (time when the fire extinguishing operation of the stove burner 10 is performed, etc.).

(1st thermal power adjustment process)
The thermal power adjustment process executed by the control unit 110 of the cooking cooker 2 will be described with reference to FIGS. 4 and 5. The thermal power adjustment process is a process for detecting that the flame of the stove burner 10 protrudes from the object to be heated 32 and reducing the thermal power of the stove burner 10 (reducing the gas supply amount). When any of the heating amount operating units 42a, 42b, and 42c is ignited and any of the stove burners 10a, 10b, and 10c is ignited, the control unit 110 adjusts the thermal power of the ignited stove burner 10. Therefore, the process shown in FIG. 4 is started. That is, the control unit 110 executes the process of FIG. 4 for each of the ignited stove burners 10.

When the stove burner 10 is ignited (step S2), the control unit 110 reads the data captured by the camera 80 and detects the contour 32a of the object to be heated 32 (step S4). When the stove burner 10 is ignited, the control unit 110 reads the past usage history of the stove burner 10 from the memory 120. Next, the control unit 110 detects the presence or absence of the flame 34 protruding outside the contour 32a from the data captured by the camera 80 (step S6). If the flame 34 is not detected outside the contour 32a (step S6: NO), the process returns to step S4, and the imaging of the contour 32a and the detection of the flame 34 are repeated.

As shown in FIG. 5 (I), when the flame 34 protruding outside the contour 32a is detected (step S6: YES), it is determined whether or not the conditions shown in steps S8, S10, and S12 are met, and the step When none of S8, S10, and S12 is applicable (steps S8, S10, S12: NO), the control unit 110 reduces the gas supply amount until the outer edge of the flame overlaps the contour 32a of the heating object 32 (FIG. 5 (II) Flame 35). Then, the control unit 110 further reduces the gas supply amount by the first predetermined amount, and reduces the size of the flame to the position shown in the flame 36 (step S14, FIG. 5 (III)). That is, the gas supply amount is reduced until the outer edge of the flame overlaps the contour 32a of the object to be heated 32 (FIG. 5 (II)), and the gas supply amount when the outer edge of the flame overlaps the contour 32a is used as the reference gas supply amount. The first predetermined amount is further reduced from the reference gas supply amount (Fig. 5 (III)). Steps S8, S10, and S12 will be described later.

In the process of step S14, the adjustment of the gas supply amount until the outer edge of the flame overlaps the contour 32a of the object to be heated 32 (the process of reducing the flame from the flame 34 to the flame 35) is based on the data taken by the camera 80. conduct. That is, while photographing the heating object 32 with the camera 80, the gas supply amount is reduced until no flame protruding outside the contour 32a of the heating object 32 is detected (the gas supply amount is reduced to the reference gas supply amount). ). Subsequent adjustment of the gas supply amount (process of reducing the flame from the flame 35 to the flame 36) reduces the reference gas supply amount by a value (first predetermined amount) stored in the memory 120.

According to the first thermal power adjustment process, when it is detected that the flame protrudes to the outside of the heating object 32, the gas supply amount is reduced so that the outer edge of the flame and the contour 32a of the heating object 32 match. .. Then, the gas supply amount is further reduced from the gas supply amount (reference gas supply amount) at which the outer edge of the flame and the contour 32a of the heating object 32 coincide with each other. Therefore, a space can be surely provided between the flame 36 and the contour 32a. In other words, the flame 36 (the outer edge 36a of the flame 36) can be located inside away from the contour 32a. It is possible to prevent the space outside the object to be heated 32 from becoming too hot, and reduce the risk that the user's clothes are burnt or the clothes are ignited.

Further, according to the first thermal power adjustment process, the gas supply amount is reduced by a predetermined amount (first predetermined amount) from the reference gas supply amount. Therefore, the outer edge 36a of the flame 36 can be maintained at a predetermined distance 38 (see FIG. 5 (III)) from the contour 32a of the object to be heated 32, and the cookability is lowered (the heating power is lowered too much). It can also be suppressed. By simply adjusting the thermal power of the stove burner 10 (decreasing the amount of gas supplied) while photographing the flame with the camera 80, the size of the flame after the flame does not protrude from the object to be heated 32 (the object to be heated). The distance between the contour and the flame) cannot be fully grasped. In the first thermal power adjustment process, the gas supply amount is reduced to the limit of the thermal power at which the flame does not protrude from the object to be heated 32, and the gas supply amount at that time is further set as a reference gas supply amount (first predetermined amount). ) Since the amount of gas supplied is reduced, the distance from the contour 32a of the object to be heated 32 to the flame 36 can be accurately adjusted to a predetermined distance 38.

Steps S8, S10, and S12 will be described. In FIG. 4, the processing proceeds in the order of steps S8, S10, and S12, but the order of steps S8, S10, and S12 is arbitrary. In step S8, it is determined whether or not the temperature of the object to be heated 32 when the stove burner 10 is ignited is equal to or higher than a predetermined temperature. The temperature of the object to be heated 32 is detected by the sensor 12. When the temperature of the object to be heated 32 at the time of ignition of the burner is equal to or higher than a predetermined temperature (step S8: YES), the control unit 110 proceeds to step S16, reduces the gas supply amount to the reference gas supply amount, and then further. , The gas supply amount is lowered by a second predetermined amount from the reference gas supply amount.

The second predetermined amount is less than the first predetermined amount. Therefore, in step S16, the thermal power of the stove burner 10 after adjusting the thermal power is maintained larger than that in the case where the process of step S14 is performed. As a result, the size of the flame is larger than that when the treatment in step S14 is performed, and the distance from the contour 32a of the object to be heated 32 to the flame (predetermined distance 38) is larger than when the treatment in step S14 is performed. It becomes smaller. That is, when it is detected that the temperature of the object to be heated 32 at the time of ignition of the stove burner 10 is equal to or higher than a predetermined value, the control unit 110 normally sets the distance from the contour 32a to the outer edge of the flame (the process of step S14). (When) is maintained at a shorter distance (first predetermined distance). As a result, when cooking is temporarily interrupted during cooking, even if the flame protrudes from the object to be heated 32, it is suppressed that the heating power of the stove burner 10 is excessively lowered, and the cooking property is suppressed from being impaired. can do. The predetermined temperature is set to a fixed value of 60 to 180 degrees, and is set to 80 degrees as an example. The predetermined temperature is stored in the memory 120.

In step S10, it is determined whether or not the protrusion of the flame from the contour 32a is detected within the first predetermined time from the start of ignition of the stove burner 10. When the flame protrusion is detected within the first predetermined time from the start of burner ignition (step S10: YES), the control unit 110 proceeds to step S18, reduces the gas supply amount to the reference gas supply amount, and then further. , The gas supply amount is reduced from the reference gas supply amount by a third predetermined amount.

The third predetermined amount is larger than the first predetermined amount. Therefore, in step S18, the thermal power of the stove burner 10 after adjusting the thermal power is kept smaller than that in the case where the process of step S14 is performed. As a result, the size of the flame is smaller than that in the case where the treatment in step S14 is performed, and the distance from the contour 32a of the object to be heated 32 to the flame (predetermined distance 38) is larger than that in the case where the treatment in step S14 is performed. growing. That is, when the flame protrusion is detected between the start of ignition of the stove burner 10 and the elapse of the first predetermined time, the control unit 110 sets the distance from the contour 32a to the outer edge of the flame longer than usual ( Maintain at the second predetermined distance). As a result, while the user has just started cooking and the user is not aware of the danger of the flame, the heating power of the stove burner 10 can be made smaller and the safety can be improved when the flame protrudes. The first predetermined time is set to a fixed value of 2 to 5 minutes, and is set to 3 minutes as an example. The first predetermined time is stored in the memory 120.

In step S12, when the protrusion of the flame from the contour 32a is detected, whether or not another stove burner 10 is being used, or whether or not it is within the second predetermined time from the end of ignition (fire extinguishing) of the stove burner 10. To judge. When the control unit 110 detects that the flame has squeezed out, the other stove burner 10 is ignited, or the second predetermined time has not elapsed since the last time the stove burner 10 was extinguished (step S12: YES). ), Proceed to step S20, the gas supply amount is reduced to the reference gas supply amount, and then the gas supply amount is further reduced from the reference gas supply amount by a fourth predetermined amount. The time when the control burner 10 is extinguished is stored in the memory 120, and the control unit 110 determines whether or not the second predetermined time has elapsed from the data read from the memory 120.

The fourth predetermined amount is less than the first predetermined amount. Therefore, in step S20, the thermal power of the stove burner 10 after adjusting the thermal power is maintained larger than that in the case where the process of step S14 is performed. As a result, the size of the flame is larger than that when the treatment in step S14 is performed, and the distance from the contour 32a of the object to be heated 32 to the flame (predetermined distance 38) is larger than when the treatment in step S14 is performed. It becomes smaller. That is, when another stove burner 10 is being used, or when a flame protrusion is detected between the end of use of the stove burner 10 and the elapse of the second predetermined time, the control unit 110 moves the flame from the contour 32a. The distance to the outer edge is maintained at a shorter distance than usual (third predetermined distance). As a result, the thermal power of the stove burner 10 is excessively reduced even if the flame protrudes from the object to be heated 32 while the user is highly aware of the danger of the flame during cooking or shortly after the end of cooking. It is possible to prevent the cooking property from being impaired. The second predetermined time is set to a fixed value of 2 to 5 minutes, and is set to 3 minutes as an example. The second predetermined time is stored in the memory 120.

(2nd thermal power adjustment process)
With reference to FIGS. 6 to 8, other thermal power adjustment processes executed by the control unit 110 of the cooking cooker 2 will be described. The processing of steps S32 to S42 is the same as that of steps S2 to S12 shown in FIG. In the second thermal power adjustment process, as shown in FIG. 7, when the flame 34 protruding outside the contour 32a is detected (step S36) and does not correspond to any of steps S38, S40, and S42 (steps S38, S40, S42). : NO), the control unit 110 sets the high temperature region 31 outside the flame 34 (step S44, FIG. 7 (I)). FIG. 7 (I) shows the outer edge of the high temperature region 31. The high temperature region 31 is set in a range where combustion of combustibles can occur due to the heat of the flame 34, and is set to 20 mm outside the flame 34 as an example.

After setting the high temperature region 31, the control unit 110 reduces the thermal power of the stove burner 10 (decreases the gas supply amount), and reduces the size of the flame 34 outside the contour 32a of the heating object 32 (FIG. FIG. 7 (II)). As the flame 34 shrinks (decreases the gas supply amount), the size of the high temperature region 31 also changes, and the flame 34 shrinks to the position shown in the high temperature region 31a. In the second thermal power adjustment process, the subsequent change in the outer edge of the high temperature region is estimated from the change in the gas supply amount and the change in the flame 34.

FIG. 8 shows the relationship between the gas supply amount and the high temperature region. The horizontal axis of the graph shows the amount of gas supplied, and the vertical axis shows the size of the outer edge of the high temperature region. When the gas supply amount is reduced from A1 to A2, the outer edge of the high temperature region is reduced from the high temperature region 31 to the high temperature region 31a (see also FIG. 7). From this result, the relational expression between the gas supply amount and the high temperature region can be created. Once the relational expression between the gas supply amount and the high temperature region is obtained, the gas supply amount A3 whose outer edge of the high temperature region coincides with the contour 32a can be calculated based on this relational expression. When the gas supply amount is reduced to A3, the outer edge 34a of the flame 34 is inside the contour 32a and is reduced to a position 38 away from the contour 32a by a predetermined distance. Further, when the gas supply amount is lower than A3 (when the outer edge of the high temperature region is moved to the inside of the contour 32a), the distance (predetermined distance 38) from the contour 32a to the outer edge 34a of the flame 34 becomes further large. In step S44, the gas supply amount is adjusted so that the outer edge of the high temperature region is located inside the contour 32a.

The processing of steps S38, S40, and S42 is substantially the same as the processing of steps S8, S10, and S12 of FIG. That is, in step S46, the distance from the contour 32a to the outer edge of the high temperature region is kept smaller than that in the case where the process of step S44 is performed. In step S48, the distance from the contour 32a to the outer edge of the high temperature region is maintained larger than that when the process of step S44 is performed. In step S50, the distance from the contour 32a to the outer edge of the high temperature region is kept smaller than when the process of step S44 was performed.

In the second thermal power adjustment process, the amount of gas to be reduced can be determined in a state where the flame protrudes from the contour 32a of the object to be heated 32. In the first thermal power adjustment process, it is necessary to determine the gas supply amount at which the contour 32a and the outer edge of the flame match, and the gas supply amount (reference gas supply amount) at the limit where the flame cannot be photographed (detected) by the camera 80. Need to be decided. The second thermal power adjustment process can determine the amount of gas to be reduced before the contour 32a and the outer edge of the flame match (when the flame can be photographed by the camera 80), so that the outflow of the flame can be quickly eliminated. be able to.

In the above embodiment (second heat adjustment treatment), the relational expression between the gas supply amount and the high temperature region is created from the two conditions of the gas supply amounts A1 and A2, but the gas supply amount is obtained from the gas supply amount of three or more conditions. And the relational expression of the high temperature region may be created.

Further, in the first heat adjustment treatment, any or all of steps S8, S10, and S12 may be omitted. Similarly, in the second heat adjustment treatment, any or all of steps S38, S40, and S42 may be omitted.

Although specific examples of the disclosed techniques have been described in detail in the present specification, these are merely examples and do not limit the scope of claims. The techniques described in the claims include various modifications and modifications of the specific examples illustrated above. In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing.

2: Heat cooker 10: Burner 32: Object to be heated 80: Camera (contour detecting means, flame detecting means)
110: Control means

Claims (6)

A burner that uses gas to heat the object to be heated,
A control means that adjusts the gas supply amount to control the thermal power of the burner,
Contour detection means for detecting the contour of the object to be heated from above the object to be heated,
A flame detecting means for detecting whether or not a flame protrudes from above the object to be heated to the outside of the contour.
Is equipped with
The control means is a cooking device that reduces the amount of gas supplied so that when the flame detecting means detects a flame protruding outside the contour, the outer edge of the flame is located inside the contour at a predetermined distance. .. When the flame detecting means detects a flame protruding outside the contour, the control means
Reduce the gas supply so that the outer edge of the flame overlaps the contour.
The cooker according to claim 1, wherein the gas supply amount when the outer edge of the flame overlaps the contour is set as a reference supply amount, and the gas supply amount is reduced by a predetermined amount from the reference supply amount. When the flame detecting means detects a flame protruding outside the contour, the control means
Set a high temperature area in a predetermined range outside the outer edge of the flame,
By lowering the gas supply amount and reducing the flame outside the contour, a relational expression between the change in the gas supply amount and the change in the flame size was created.
The cooker according to claim 1, wherein the amount of gas supplied is reduced so that the outer edge of the high temperature region is located inside the contour based on the relational expression. In addition, it is equipped with a temperature sensor that detects the temperature of the object to be heated.
When the temperature sensor detects a temperature equal to or higher than a predetermined temperature when the burner is ignited, the distance from the contour to the outer edge of the flame is the distance when the flame detecting means detects a flame protruding outside the contour. The heating cooker according to any one of claims 1 to 3, wherein the gas supply amount is reduced so that the first predetermined distance is smaller than the predetermined distance. When the flame detecting means detects a flame protruding outside the contour between the start of ignition of the burner and the elapse of the first predetermined time, the distance from the contour to the outer edge of the flame is greater than the predetermined distance. The heating cooker according to any one of claims 1 to 3, which reduces the amount of gas supplied so as to have a large second predetermined distance. When the burner is ignited while using another burner or before the second predetermined time elapses after the ignition of the burner is completed, when the flame detecting means detects a flame protruding outside the contour. The heating cooker according to any one of claims 1 to 3, wherein the gas supply amount is reduced so that the distance from the contour to the outer edge of the flame becomes a third predetermined distance smaller than the predetermined distance.

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