JPWO2020004232A1 - How to detect scorching signs in cookers and cookers - Google Patents

Abstract

The heating cooker includes a top plate, a heating unit, a heating control unit, a lower surface temperature detector, an upper surface temperature detector, and a sign detection unit. A cooking container for storing ingredients is placed on the top plate. The heating unit is located below the top plate and heats the cooking container. The heating control unit controls the heating output of the heating unit. The bottom surface temperature detector is arranged below the top plate and detects the bottom surface temperature of the cooking container placed on the top plate. The top surface temperature detector is located above the top plate and detects the temperature information of the top plate. The sign detection unit detects the burning sign of the food based on the upper surface temperature of the mounting area on the top plate on which the cooking container is placed and the lower surface temperature of the cooking container, which are included in the temperature information of the top plate. ..

Description

The present disclosure relates to a cooker and a method of detecting a burnt sign in a cooker.

In recent years, heating cookers that do not use fire, do not emit combustion gas, and use induction heating, which is a safe and clean heat source, have become widespread in kitchens of ordinary households. In the case of a cooking cooker using gas, the user visually and sensuously adjusts the heating output while observing the size of the flame.

In the case of a heating cooker using induction heating, the user sets the heating output and cooking temperature while observing the numerical values displayed on the operation unit. A cooker using induction heating has a temperature sensor that is placed below the top plate on which the cooking container is placed and detects the temperature of the cooking container in order to maintain a set cooking temperature.

The temperature detected by this temperature sensor is the temperature of the lower surface of the cooking container, that is, the bottom of the pot via the top plate, not the temperature of the foodstuff contained in the cooking container. Therefore, it is difficult to appropriately control the temperature of the food material with the conventional cooking device. As a result, in the conventional cooking cooker, there is a possibility that the simmered food may be burnt.

A conventional cooking cooker includes a configuration including a dedicated cooking container having a plurality of vertically arranged temperature sensors in order to detect scorching or the like (see Patent Document 1). In the dedicated cooking container described in Patent Document 1, scorching and spillage are detected by detecting the position of the water surface in the dedicated cooking container based on the temperatures detected by a plurality of temperature sensors.

Japanese Unexamined Patent Publication No. 2008-34228

The conventional cooking cooker indirectly detects the temperature of the cooking container via the top plate, and does not directly detect the temperature of the cooking container. If the temperature of the food is controlled based on the temperature detected including an error, it is difficult to cook the food properly. As a result, in the conventional cooking cooker, there is a possibility that the simmered food may be burnt. In the cooking device described in Patent Document 1, it is necessary to specially prepare a dedicated cooking container.

In the present disclosure, by detecting the temperature of the foodstuff contained in the cooking container, it is possible to detect a sign of burning of the foodstuff and to appropriately control the temperature of the foodstuff. An object of the present invention is to provide a method for detecting a sign.

One aspect of the present disclosure is a cooking cooker including a top plate, a heating unit, a heating control unit, a lower surface temperature detector, an upper surface temperature detector, and a sign detection unit.

A cooking container for storing ingredients is placed on the top plate. The heating unit is located below the top plate and heats the cooking container. The heating control unit controls the heating output of the heating unit. The bottom surface temperature detector is arranged below the top plate and detects the bottom surface temperature of the cooking container placed on the top plate. The top surface temperature detector is located above the top plate and detects the temperature information of the top plate.

The sign detection unit detects the burning sign of the food based on the upper surface temperature of the mounting area on the top plate on which the cooking container is placed and the lower surface temperature of the cooking container, which are included in the temperature information of the top plate. ..

Another aspect of the present disclosure is a top plate configured to accommodate a cooking container for containing foodstuffs, a heating unit arranged below the top plate and configured to heat the cooking container, and the like. It is a method of detecting a burning sign in a cooking device having.

The detection method of this embodiment includes a step of detecting the temperature of the lower surface of the cooking container, a step of detecting the temperature information of the top plate, and a step on the top plate on which the cooking container is placed, which is included in the temperature information of the top plate. It includes a step of detecting a sign of scorching of the food based on the temperature of the upper surface of the mounting area and the temperature of the lower surface of the cooking container.

According to the present disclosure, a cooker and a cooker capable of detecting a sign of burning of a food by detecting the temperature of the food contained in the cooking container and appropriately controlling the temperature of the food. It is possible to provide a method for detecting a scorching sign in.

FIG. 1 is a perspective view showing the appearance of the cooking cooker according to the embodiment of the present disclosure. FIG. 2 is a block diagram showing a schematic configuration of a cooking cooker according to an embodiment and a configuration of a temperature control system thereof. FIG. 3 is a block diagram showing a configuration of a temperature control system in the cooking device according to the embodiment. FIG. 4 is a graph showing the temperature difference generated between the lower surface temperature and the upper surface temperature of the cooking container. FIG. 5 is a flowchart showing a temperature information acquisition process according to the embodiment. FIG. 6 is a flowchart showing a scorching sign detection process according to the embodiment. FIG. 7 is a flowchart showing post-processing in the detection process of the burnt sign.

The first aspect of the present disclosure is a cooking cooker including a top plate, a heating unit, a heating control unit, a bottom surface temperature detector, a top surface temperature detector, and a sign detection unit.

A cooking container for storing ingredients is placed on the top plate. The heating unit is located below the top plate and heats the cooking container. The heating control unit controls the heating output of the heating unit. The bottom surface temperature detector is arranged below the top plate and detects the bottom surface temperature of the cooking container placed on the top plate. The top surface temperature detector is located above the top plate and detects the temperature information of the top plate.

The sign detection unit detects the burning sign of the food based on the upper surface temperature of the mounting area on the top plate on which the cooking container is placed and the lower surface temperature of the cooking container, which are included in the temperature information of the top plate. ..

In the cooking device of the second aspect of the present disclosure, in addition to the first aspect, the sign detection unit detects the placement region based on the temperature information of the top plate.

In the heating cooker of the third aspect of the present disclosure, in addition to the first aspect, the sign detection unit has a difference value between the upper surface temperature of the mounting region and the lower surface temperature of the cooking container being equal to or more than a predetermined difference threshold value. In some cases, detect a scorching sign.

In the cooking device of the fourth aspect of the present disclosure, in addition to the third aspect, the sign detection unit detects the scorching sign when the bottom surface temperature of the cooking container is equal to or higher than a predetermined temperature threshold value. ..

In the heating cooker of the fifth aspect of the present disclosure, in addition to the first aspect, the heating control unit controls the heating output of the heating unit based on the detection result of the sign detection unit.

In the heating cooker of the sixth aspect of the present disclosure, in addition to the fifth aspect, the heating control unit controls the heating output when a predetermined post-predictive time elapses after the sign detection unit detects the scorching sign. To do.

In the heating cooker of the seventh aspect of the present disclosure, in addition to the sixth aspect, when the heating output of the heating unit is reduced from the detection of the scorching sign to the lapse of the post-predictive time, The sign detection unit initializes the detection result of the scorching sign, and then invalidates the detection of the scorching sign until a predetermined invalidation time elapses.

In the heating cooker of the eighth aspect of the present disclosure, in addition to the first aspect, a setting unit configured to set at least one of a heating output and a cooking menu is further provided. The sign detection unit determines the difference threshold value according to the setting by the setting unit, and detects the scorching sign when the difference value between the upper surface temperature of the mounting area and the lower surface temperature of the cooking container is equal to or greater than the difference threshold value. ..

In the heating cooker of the ninth aspect of the present disclosure, in addition to the first aspect, the sign detection unit detects a scorching sign when the temperature of the lower surface of the cooking container is within a predetermined temperature range.

A tenth aspect of the present disclosure includes a top plate configured to mount a cooking container for accommodating ingredients, and a heating unit arranged below the top plate and configured to heat the cooking container. It is a method of detecting a sign of scorching in a cooking device having.

The detection method of this embodiment includes a step of detecting the temperature of the lower surface of the cooking container, a step of detecting the temperature information of the top plate, and a step on the top plate on which the cooking container is placed, which is included in the temperature information of the top plate. It includes a step of detecting a sign of scorching of the food based on the temperature of the upper surface of the mounting area and the temperature of the lower surface of the cooking container.

In addition to the tenth aspect, the method for detecting a burnt sign in the cooking device according to the eleventh aspect of the present disclosure includes a step of detecting a pre-described region based on the temperature information of the top plate.

In the method for detecting a burnt sign in the cooking device according to the twelfth aspect of the present disclosure, in addition to the tenth aspect, the difference value between the upper surface temperature of the mounting region and the lower surface temperature of the cooking container is equal to or higher than a predetermined difference threshold value. In some cases, it involves the step of detecting a scorching sign.

In addition to the twelfth aspect, the method for detecting a scorching sign in the cooking device according to the thirteenth aspect of the present disclosure includes a step of detecting a scorching sign when the temperature of the lower surface of the cooking container is equal to or higher than a predetermined temperature threshold value. Including.

In addition to the tenth aspect, the method for detecting a scorching sign in the cooking device according to the fourteenth aspect of the present disclosure includes a step of controlling the heating output of the heating unit based on the detection result of the scorching sign.

In addition to the tenth aspect, the method for detecting a scorching sign in the heating cooker according to the fifteenth aspect of the present disclosure controls the heating output of the heating unit when a predetermined post-predictive time elapses after detecting the scorching sign. Includes steps to do.

In addition to the fifteenth aspect, the method for detecting a scorching sign in the cooking device according to the sixteenth aspect of the present disclosure is that when the heating output is reduced from the detection of the scorching sign to the lapse of the post-predictive time. It includes a step of initializing the detection result of the scorching sign and a step of disabling the detection of the scorching sign until a predetermined time after invalidation elapses.

In addition to the tenth aspect, the method for detecting a scorching sign in the heating cooker according to the seventeenth aspect of the present disclosure includes a step of determining a difference threshold value according to a setting by a user, a top temperature of a mounting area, and cooking. This includes a step of detecting a sign of scorching when the difference value from the bottom surface temperature of the container is equal to or greater than the difference threshold value.

In addition to the tenth aspect, the method for detecting a scorching sign in the cooking device according to the eighteenth aspect of the present disclosure includes a step of detecting a scorching sign when the temperature of the lower surface of the cooking container is within a predetermined temperature range.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The embodiments described below are specific examples of the present disclosure. The numerical values, shapes, configurations, steps, and the order of steps shown in the present embodiment are examples, and do not limit the present disclosure.

The following embodiment is an example in which the technical idea of the present disclosure is applied to an induction heating cooker. However, the technical idea of the present disclosure is not limited to the induction heating cooker.

FIG. 1 is a perspective view showing the appearance of the cooking cooker 1 according to the embodiment of the present disclosure. In FIG. 1, the X-axis, the Y-axis, and the Z-axis indicate the left-right direction, the front-back direction, and the up-down direction of the cooking cooker 1, respectively. FIG. 2 is a block diagram showing a schematic configuration of the cooking cooker 1 and a configuration of its temperature control system.

As shown in FIGS. 1 and 2, the heating cooker 1 includes a main body 2 and a top surface temperature detecting unit 3. The upper surface of the main body 2 is a top plate 5 on which the cooking container V is placed. The upper surface temperature detecting unit 3 is arranged at the center of the hood portion 4a of the range hood 4 arranged above the top plate 5.

The top surface temperature detection unit 3 is detachably attached by a mounting means such as a magnet, an adhesive material, or a clip. The top surface temperature detection unit 3 includes a top surface temperature detector 8 and a second communication unit 7. The top surface temperature detector 8 is composed of an infrared sensor, a thermal image camera, and the like, and detects the temperature of the entire region of the top plate 5 as the temperature information of the top plate 5.

The top surface temperature detection unit 3 may be arranged on the ceiling, wall surface, or the like as long as it can detect the temperature information of the top plate 5. The distance between the top surface temperature detector 8 and the top plate 5 is preferably, for example, 600 mm or more and 2000 mm or less.

In the present embodiment, as described above, the top surface temperature detector 8 detects the temperature of the entire region of the top plate 5 as the temperature information of the top plate 5. However, the top surface temperature detector 8 may detect the temperature in the region of the top plate 5 on which the cooking container V is placed as the temperature information of the top plate 5.

In the present embodiment, the top surface temperature detector 8 includes, for example, infrared detection elements arranged in a matrix of 8 × 8, 16 × 16, 32 × 32. With this configuration, the top surface temperature detector 8 can divide the entire region of the top plate 5 into at least 64 regions and detect the temperature in each region.

That is, the temperature information of the top plate 5 includes at least 64 temperatures arranged in a matrix. Hereinafter, the temperature information means all or a part of the temperature detected by the upper surface temperature detector 8.

The second communication unit 7 transmits the temperature information of the top plate 5 to the first communication unit 6 arranged in the main body 2. The first communication unit 6 and the second communication unit 7 perform wireless communication using, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark), or BLE (Bluetooth Low Energy). Wired communication may be performed instead of wireless communication.

A heating unit 9 including heating coils 9A, 9B, and 9C is arranged below the top plate 5. The heating coil 9A is arranged on the left side, the heating coil 9B is arranged on the right side, and the heating coil 9C is arranged in the center. In each region of the top plate 5 above the heating coils 9A, 9B, 9C, the position where the cooking container V should be placed is indicated by printing.

In the front region on the top plate 5, a top surface operation unit 15 is arranged for setting the heating output, cooking temperature, cooking time, cooking menu, and the like. The top surface operation unit 15 is composed of touch keys, a touch panel, and the like.

On the front surface of the main body 2, a front operation unit 16 having a plurality of keys is arranged in order to make various settings such as a heating output, a cooking temperature, a cooking time, and a cooking menu. The front operation unit 16 is configured to automatically project and appear when a predetermined portion on the front wall of the main body 2 is pressed. In the present embodiment, the top surface operation unit 15 and the front surface operation unit 16 form the setting unit 19 (see FIG. 3).

The heating cooker 1 has a grill cooking unit 17. The grill cooking unit 17 grills the ingredients in the heating chamber with a grill heater. The heating cooker 1 discharges smoke generated in the grill cooking unit 17 to the outside of the main body 2 from an exhaust port 18 arranged behind the top plate 5.

FIG. 3 is a block diagram showing a configuration of a temperature control system in the cooking device 1. As shown in FIG. 3, the main body 2 of the heating cooker 1 includes a first communication unit 6, a heating unit 9, a heating control unit 10, a sign detection unit 11, a bottom surface temperature detector 12, and a storage unit 13. It has a notification unit 14, a top surface operation unit 15, and a front surface operation unit 16. As described above, the first communication unit 6 wirelessly receives the temperature information of the top plate 5 detected by the top surface temperature detection unit 3.

The sign detection unit 11 detects a burnt sign of the food material C housed in the cooking container V placed on the top plate 5. Targets for detecting scorched signs include curry, stew, soup, milk, and soy milk. These ingredients are basically highly viscous and begin to burn at temperatures between 60 ° C and 100 ° C.

The storage unit 13 stores various cooking menus and heating programs included in each cooking menu. The heating control unit 10 executes the cooking menu by controlling the heating unit 9 so as to execute the heating program. The storage unit 13 also stores collation data that associates the result of the detection of the scorched sign by the sign detection unit 11 with the heating program. The process of detecting the sign of scorching will be described later.

The heating control unit 10 controls the heating unit 9 using a heating program corresponding to the detection result of the sign detection unit 11 based on the collation data. By operating the top surface operation unit 15 and the front surface operation unit 16, the user can set the heating output of the heating unit 9 and select one of the heating programs stored in the storage unit 13. ..

In the present embodiment, the heating control unit 10 and the sign detection unit 11 are included in the control unit 20 composed of a microprocessor. The control unit 20 is not limited to the microprocessor. However, if a programmable microprocessor is used, the processing content can be easily changed, and the degree of freedom in design can be increased.

In order to improve the processing speed, the control unit 20 can be configured by a logic circuit. The control unit 20 may be physically composed of one or a plurality of elements. When the control unit 20 is composed of a plurality of elements, the heating control unit 10 and the sign detection unit 11 may be composed of separate elements. In this case, it can be considered that each element corresponds to the heating control unit 10 or the sign detection unit 11.

The bottom surface temperature detector 12 is provided for each of the heating coils 9A, 9B, and 9C. The bottom surface temperature detector 12 is composed of an infrared sensor or a thermistor, detects the bottom surface temperature of the cooking container V, and outputs the bottom surface temperature to the control unit 20. The bottom surface temperature detector 12 is arranged at a position deviated from the center of each of the heating coils 9A, 9B, and 9C so as to detect the highest temperature on the bottom surface of the cooking container V.

The notification unit 14 notifies various information regarding the heating state, the heating temperature, the heating time, and the like in the heating cooker 1. The notification unit 14 has a display unit arranged adjacent to the top surface operation unit 15 and a display unit arranged adjacent to the front operation unit 16. These display units are composed of, for example, a black-and-white or color liquid crystal panel, and display various information on at least one of characters and images. The notification unit 14 is also arranged in front of the cooking cooker 1 and has a sound output unit that provides voice guidance of various information to the user.

The notification unit 14 notifies the detection result output by the sign detection unit 11 visually, audibly, or both. For example, when the sign detection unit 11 detects a scorching sign that may cause scorching of the food material C, the sound output unit of the notification unit 14 generates a voice for notifying that the scorching sign has been detected. You may. The sound output unit of the notification unit 14 may generate a sound for prompting the stirring of the food material C.

[Basic concept of detection of scorching omen]
When the cooking container V is heated and the temperature of the food material C housed in the cooking container V rises, the viscosity of the food material C becomes high, and convection is less likely to occur in the food material C. At this time, a temperature difference of 20 ° C. or more occurs between the upper surface temperature and the lower surface temperature of the cooking container V. Such a phenomenon occurs in highly viscous simmered dishes such as curry and stew. If heating is continued as it is, the food material C may be scorched.

In the present embodiment, the sign detection unit 11 detects whether or not the food material C is a highly viscous simmered dish by detecting the temperature difference between the lower surface temperature and the upper surface temperature of the cooking container V. When the food material C is a highly viscous simmered dish, the sign detection unit 11 determines that the food material C is in a state of a burning sign when at least the bottom surface temperature reaches a predetermined temperature.

FIG. 4 is a graph showing the temperature difference generated between the lower surface temperature TA and the upper surface temperature TB of the cooking container V. In FIG. 4, the bottom surface temperature TA is the temperature detected by the bottom surface temperature detector 12, and the top surface temperature TB is the temperature obtained from the temperature information of the top plate 5 detected by the top surface temperature detector 8.

In the present embodiment, the top surface temperature TB is an average value of the temperatures included in the temperature information in the region of the top plate 5 on which the cooking container V is placed. Hereinafter, the area of the top plate 5 on which the cooking container V is placed is referred to as a mounting area. The top surface temperature TB may be the maximum value of the temperature included in the temperature information in the mounting region.

As shown in FIG. 4, when the difference value ΔT between the bottom surface temperature TA and the top surface temperature TB reaches a predetermined difference threshold value ΔTth and the bottom surface temperature TA reaches the temperature threshold value TAth, the sign detection unit 11 determines. Detects a sign of burning of foodstuff C. The difference threshold value ΔTth and the temperature threshold value TAth are threshold values for detecting a scorching sign. In the present embodiment, the difference threshold value ΔTth and the temperature threshold value TAth are 20 ° C. and 60 ° C., respectively.

The scorching sign detection process according to the present embodiment will be described in detail below. In the detection of the burnt sign, the upper surface temperature detecting unit 3 first executes the temperature information acquisition process.

[Acquisition of temperature information]
As described above, the top surface temperature detector 8 divides the top plate 5 into a large number of regions, and repeatedly detects the temperature of the entire region as the temperature information of the top plate 5. The second communication unit 7 repeatedly transmits the temperature information of the top plate 5 detected by the top surface temperature detector 8 to the main body 2.

FIG. 5 is a flowchart showing a temperature information acquisition process according to the present embodiment. The temperature information acquisition process is executed by a control unit (not shown) provided in the upper surface temperature detection unit 3 controlling the second communication unit 7 and the upper surface temperature detector 8.

The top surface temperature detection unit 3 is always in a state where wireless communication is possible. When the power of the main body 2 is turned on, the main body 2 communicates with the upper surface temperature detection unit 3 via wireless communication. As a result, the top surface temperature detector 8 starts the temperature information acquisition process.

As shown in FIG. 5, in step 101, the first communication unit 6 and the second communication unit 7 perform a process for establishing a communication connection between the main body 2 and the top surface temperature detection unit 3. In step 102, it is confirmed whether or not the process of step 101 is successful. In the present embodiment, the connection state is confirmed at predetermined time intervals. Specifically, the predetermined time in this case is a repeating cycle of detecting the temperature information of the top plate 5.

In step 103, the top surface temperature detector 8 detects the temperature information of the top plate 5. In the present embodiment, the temperature information of the top plate 5 includes, for example, 256 (= 16 × 16) values. In step 104, the second communication unit 7 transmits the temperature information of the top plate 5 to the main body 2.

In step 105, it is determined whether or not the predetermined time has elapsed. If the predetermined time has not elapsed, the process proceeds to step 106. In step 106, the cooker 1 shifts to sleep mode. In the sleep mode, the communication connection between the main body 2 and the upper surface temperature detection unit 3 is maintained, but the temperature is not detected. Communication between the main body 2 and the top surface temperature detection unit 3 is less frequent than usual. As a result, power consumption is reduced in sleep mode.

In step 107, it is determined whether or not the power of the main body 2 is turned off. When the power of the main body 2 is turned off, the communication connection between the main body 2 and the upper surface temperature detection unit 3 is cut off, and the temperature information acquisition process is completed. If the power of the main body 2 is not turned off, the process returns to step 105. In step 105, if the predetermined time has elapsed, the process returns to step 101 and starts the next temperature information acquisition process.

[Detection of scorching signs]
The first communication unit 6 repeatedly receives the temperature information of the top plate 5 transmitted from the upper surface temperature detection unit 3, and transmits the received information to the control unit 20.

FIG. 6 is a flowchart showing a scorching sign detection process according to the present embodiment. The scorching sign detection process is executed by the control unit 20 controlling other elements included in the main body 2.

In the scorching sign detection process, the sign detection unit 11 specifies the region of the top plate 5 where the temperature rises as the mounting region on which the cooking container V is placed, based on the temperature information of the top plate 5. .. The sign detection unit 11 extracts the temperature information of the mounting region as the temperature information of the upper surface of the cooking container V.

When the heating control unit 10 starts driving the heating unit 9, the sign detection unit 11 starts the process of detecting the burnt sign.

As shown in FIG. 6, in step 201, the first communication unit 6 and the second communication unit 7 establish a communication connection between the main body 2 and the top surface temperature detection unit 3. In step 202, it is confirmed whether or not the process of step 201 is successful. The processes of steps 201 and 202 are the same as the processes of steps 101 and 102 described above, and may be omitted because they have already been executed.

In step 203, the first communication unit 6 acquires the temperature information of the top plate 5 transmitted from the top surface temperature detection unit 3. In step 204, the sign detection unit 11 identifies the mounting region based on the temperature information of the top plate 5. In step 205, the sign detection unit 11 extracts the temperature information of the mounting region from the temperature information of the top plate 5.

In step 206, the sign detection unit 11 calculates the average value of the temperatures included in the temperature information of the mounting region as the top surface temperature TB. The top surface temperature TB may be the maximum value of the temperature included in the temperature information of the mounting region.

In step 207, the bottom surface temperature detector 12 acquires the bottom surface temperature TA of the cooking container V. In step 208, the sign detection unit 11 calculates the difference value ΔT between the bottom surface temperature TA and the top surface temperature TB.

In step 209, the sign detection unit 11 compares the difference value ΔT with a predetermined difference threshold value ΔTth. If the difference value ΔT has not reached the difference threshold value ΔTth, the process proceeds to step 210. In step 210, the sign detection unit 11 determines whether or not a predetermined time has elapsed. Specifically, the predetermined time in this case is a repeating cycle of detecting a scorching sign.

If the predetermined time has not elapsed, in step 211, the sign detection unit 11 determines whether or not the heating by the heating unit 9 has been stopped.

If the heating is stopped, in step 212, the sign detection unit 11 determines whether or not the power is turned off. If the power is off, the process proceeds to step 213. In step 213, the communication connection between the main body 2 and the upper surface temperature detection unit 3 is disconnected, and the sign detection unit 11 ends the detection of the scorched sign.

If the power is not turned off, the sign detection unit 11 ends the detection of the scorched sign while maintaining the communication connection between the main body 2 and the upper surface temperature detection unit 3.

In the present embodiment, the power on / off operation and the heating start / stop operation are performed by pressing separate operation buttons. Therefore, the connection / disconnection of the communication between the main body 2 and the upper surface temperature detection unit 3 is controlled by the power on / off operation, and the start / end of the detection of the scorching sign is controlled by the heating start / stop operation. To.

In step 210, if the predetermined time has elapsed, the process returns to step 201, and the detection of the next scorching sign is performed.

On the other hand, if the difference value ΔT is equal to or higher than the difference threshold value ΔTth in step 209, the sign detection unit 11 determines in step 214 whether or not the lower surface temperature TA of the cooking container V is equal to or higher than the temperature threshold value TAth.

If the bottom surface temperature TA of the cooking container V is equal to or higher than the temperature threshold TAth, the sign detection unit 11 determines in step 215 that the burn sign has been detected. The notification unit 14 notifies the detection of the scorching sign visually, audibly, or both. In step 216, post-processing described later is performed. After the post-treatment, the treatment returns to step 201 and the detection of the next scorching sign is started.

If the bottom surface temperature TA does not reach the temperature threshold TAth, the process returns to step 201 to detect the next scorching sign.

FIG. 7 is a flowchart showing post-processing in the detection process of the burnt sign. As shown in FIG. 7, in step 301, the sign detection unit 11 measures the elapsed time from the detection of the scorching sign.

In step 302, the sign detection unit 11 determines whether or not the user has reduced the heating output by using the operation unit before the elapsed time reaches a predetermined sign post-time. If the heating output is not reduced, the process proceeds to step 303, and if the heating output is reduced, the process proceeds to step 305.

In step 303, the sign detection unit 11 determines whether or not a predetermined time has elapsed since the burnt sign was detected. If the predetermined time has not elapsed, the process returns to step 301. After a lapse of a predetermined time, in step 304, the heating control unit 10 reduces the heating output. The process returns to step 301.

In step 305, the sign detection unit 11 initializes the detection result of the burn sign, assuming that the state of the burn sign has been eliminated as a result of the user reducing the heating output. In step 306, the sign detection unit 11 invalidates the detection of the burn sign so that the burn sign is not detected for a predetermined time.

In step 307, the sign detection unit 11 measures the elapsed time from invalidation of the detection of the scorching sign. In step 308, the sign detection unit 11 determines whether or not the user has stopped heating by using the operation unit before the elapsed time reaches a predetermined time after invalidation.

If the heating has been stopped, the process proceeds to step 309. In step 309, the sign detection unit 11 determines whether or not the power is turned off. If the power is turned off, in step 310, the communication connection between the main body 2 and the upper surface temperature detection unit 3 is disconnected, and the sign detection unit 11 ends the post-processing. If the power is not turned off, the sign detection unit 11 ends the post-processing while maintaining the communication connection between the main body 2 and the top surface temperature detection unit 3.

If the heating is not stopped in step 308, the process proceeds to step 311. In step 311 the sign detection unit 11 determines whether or not the elapsed time is equal to or longer than the time after invalidation. If the elapsed time is equal to or longer than the time after invalidation, in step 312, the sign detection unit 11 enables the detection of the burnt sign and ends the post-processing. If the elapsed time has not reached the time after invalidation, the process returns to step 307.

As described above, the cooking cooker 1 is configured to detect the sign of burning of the food material C, notify the user, and appropriately control the temperature of the food material C. According to this embodiment, the safety and reliability of the cooking cooker 1 can be improved.

A modified example of this embodiment is shown below. The sign detection unit 11 may determine the difference threshold value ΔTth according to at least one of the output of the heating unit 9 and the cooking menu set by the setting unit 19 (top operation unit 15, front operation unit 16). For example, when the output of the heating unit 9 is large, the difference threshold value ΔTth is reduced.

The sign detection unit 11 may determine the difference threshold value ΔTth according to the bottom surface temperature TA at the start of heating. The difference threshold value ΔTth may be determined according to the top surface temperature TB of the mounting region at the start of heating. By determining the difference threshold value ΔTth based on at least one of the lower surface temperature and the upper surface temperature of the cooking container V, it is determined whether the food material C is at room temperature or frozen, and is appropriate according to the detection result. It is possible to select a heating program.

The sign detection unit 11 may detect the scorching sign when the bottom surface temperature TA is within a predetermined temperature range (40 ° C. to 250 ° C.), and may not detect the scorching sign otherwise. This is because if the temperature of the lower surface of the cooking container V is less than 40 ° C. or exceeds 250 ° C., no scorching occurs.

The technical ideas of the present disclosure are applicable to cookers.

1 Heat cooker 2 Main body 3 Top temperature detector 4 Range hood 5 Top plate 6 1st communication unit 7 2nd communication unit 8 Top temperature detector 9 Heating unit 10 Heating control unit 11 Predictive detector 12 Bottom temperature detector 13 Memory Unit 14 Notification unit 15 Top surface operation unit 16 Front operation unit 17 Grill cooking unit 18 Exhaust port 19 Setting unit 20 Control unit

Claims (18)

A top plate configured to hold a cooking container for storing ingredients,
A heating unit located below the top plate and configured to heat the cooking container.
A heating control unit configured to control the heating output of the heating unit,
A bottom temperature detector arranged below the top plate and configured to detect the bottom temperature of the cooking container placed on the top plate.
An upper surface temperature detector located above the top plate and configured to detect temperature information on the top plate.
Based on the upper surface temperature of the mounting area on the top plate on which the cooking container is placed and the lower surface temperature of the cooking container, which is included in the temperature information of the top plate, a sign of burning of the foodstuff is given. A cooker with a predictive detector configured to detect. The cooker according to claim 1, wherein the sign detection unit is configured to detect a previously described region based on the temperature information of the top plate. A claim that the sign detection unit is configured to detect the scorching sign when the difference value between the upper surface temperature of the above-mentioned pre-described region and the lower surface temperature of the cooking container is equal to or more than a predetermined difference threshold value. The heating cooker according to 1. The heating cooker according to claim 3, wherein the sign detection unit is configured to detect the scorching sign when the bottom surface temperature of the cooking container is equal to or higher than a predetermined temperature threshold value. The heating cooker according to claim 1, wherein the heating control unit is configured to control the heating output of the heating unit based on the detection result of the sign detection unit. The heating cooker according to claim 5, wherein the heating control unit is configured to control the heating output when a predetermined post-precursor time elapses after the sign detection unit detects the scorching sign. When the heating output of the heating unit is reduced from the detection of the scorching sign until the time after the sign elapses, the sign detecting unit initializes the detection result of the scorching sign, and thereafter, a predetermined The cooker according to claim 6, wherein the detection of the scorching sign is invalidated until a time elapses after the invalidation. It further comprises a setting unit configured to set at least one of the heating output and the cooking menu.
When the sign detection unit determines the difference threshold value according to the setting by the setting unit, and the difference value between the upper surface temperature of the above-mentioned placed region and the lower surface temperature of the cooking container is equal to or greater than the difference threshold value. The heating cooker according to claim 1, which is configured to detect the scorching sign. The heating cooker according to claim 1, wherein the sign detection unit is configured to detect the scorching sign when the bottom surface temperature of the cooking container is within a predetermined temperature range. A top plate configured to hold a cooking container for storing ingredients,
A method for detecting a burnt sign in a heating cooker having a heating portion arranged below the top plate and configured to heat the cooking container.
The step of detecting the bottom surface temperature of the cooking container and
The step of detecting the temperature information of the top plate and
Based on the upper surface temperature of the mounting area on the top plate on which the cooking container is placed and the lower surface temperature of the cooking container, which is included in the temperature information of the top plate, a sign of burning of the foodstuff is given. A method of detecting a scorching sign in a cooker, including a step to detect. The method for detecting a burnt sign in a cooking device according to claim 10, further comprising a step of detecting a previously described region based on the temperature information of the top plate. The heating cooker according to claim 10, further comprising a step of detecting a sign of scorching when the difference value between the top surface temperature of the above-described region and the bottom surface temperature of the cooking container is equal to or greater than a predetermined difference threshold value. How to detect a scorching sign in. The method for detecting a scorching sign in a heating cooker according to claim 12, further comprising a step of detecting the scorching sign when the bottom surface temperature of the cooking container is equal to or higher than a predetermined temperature threshold value. The method for detecting a burnt sign according to claim 10, further comprising a step of controlling the heating output of the heating unit based on the result of detecting the burnt sign. The method for detecting a scorching sign in a cooking cooker according to claim 10, further comprising a step of controlling the heating output of the heating unit when a predetermined post-signing time elapses after detecting the scorching sign. When the heating output is reduced from the detection of the scorching sign to the elapse of the post-signing time, the step of initializing the detection result of the scorching sign and the step of initializing the detection result of the scorching sign.
The method for detecting a burnt sign according to claim 15, further comprising a step of invalidating the detection of the burnt sign until a predetermined time has elapsed after the invalidation. The step of determining the difference threshold according to the setting by the user,
The cooking according to claim 10, further comprising a step of detecting a sign of scorching when the difference value between the top surface temperature of the above-described region and the bottom surface temperature of the cooking container is equal to or greater than the difference threshold value. How to detect a burning sign in a container. The method for detecting a scorching sign in a cooking device according to claim 10, further comprising a step of detecting the scorching sign when the bottom surface temperature of the cooking container is within a predetermined temperature range.

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