JP7285394B2 - Heating cooker and heating control method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a heating cooker and a heating control method.

2. Description of the Related Art Conventionally, there has been proposed a heating cooker that cooks an object to be heated by induction heating (see Patent Document 1, for example).

The heating cooker of Patent Document 1 is connected via a network to a thermal image camera that captures a thermal image of an area including a cooking container being heated and a notification device capable of notifying the cooking user of information. Equipped with a cooking support system that supports the cooking of

The heating cooker of Patent Document 1 calculates a value indicating a change in the water level of the content in the cooking container from the thermal image acquired by the thermal imaging camera, and the calculated value indicating the change in the water level is equal to or greater than a predetermined threshold. Determine whether or not When it is determined that the calculated value indicating the change in water level is equal to or greater than a predetermined threshold, it is determined that there is a risk that the contents of the cooking vessel during heat cooking may boil over, and the cooking user is notified to that effect. By such a method, the boiling over of the contents from the cooking container is estimated, and the boiling over is prevented.

JP 2017-224171 A

In the case of conventional heating cookers, an infrared sensor (such as a thermal image camera) determines the temperature of the food being cooked. , the physical phenomenon that the energy radiated from the object to be measured is disturbed and the accuracy of the measured temperature is impaired is not taken into account. Therefore, the accuracy of determination of the cooking state using the infrared sensor is lowered, and it may be difficult to appropriately control the amount of heating.

The present invention is intended to solve the above-mentioned conventional problems, and even if there is a disturbance factor such as steam, it is possible to suppress the deterioration of the detection accuracy, improve the judgment accuracy of the cooking situation, and adjust the heating amount appropriately according to the cooking situation. The purpose is to exercise control.

In order to solve the above-described conventional problems, the present invention provides one or more heating means for heating a container containing an object to be cooked from below, and provided above the one or more heating means, an infrared sensor equipped with a plurality of pixels that detects temperature information on one or more heating means at predetermined time intervals; and a communication unit that communicates the temperature information obtained by the infrared sensor by wire or wirelessly. , a disturbance factor tolerance setting means for setting a set value according to a disturbance factor generated in the infrared sensor; A pixel number measuring means for measuring the number of pixels, a cooking status determining means for determining the cooking status based on the measurement result of the pixel number measuring means, and a heating for increasing or decreasing the heating amount based on the determination result of the cooking status determining means. and a control means.

Further, the present invention can provide a heating cooker in which the cooking condition determining means detects a sign of boiling over when the increase in the number of pixels measured by the pixel number measuring means exceeds a predetermined value.

Further, the present invention can provide a heating cooker in which the cooking situation determining means detects boiling when the change per unit time of the number of pixels measured by the pixel number measuring means saturates.

Further, the present invention can provide a heating cooker in which the set value of the disturbance factor tolerance setting means is changed according to the temperature change of the temperature information obtained by the infrared sensor for a predetermined period.

Further, the present invention includes the plurality of heating means, and measurement pixel division setting means for dividing the plurality of pixels corresponding to each of the plurality of heating means, wherein the pixel number measurement means It is possible to provide a heating cooker that measures the number of pixels corresponding to each of the means.

In addition, the present invention provides one or more heating means for heating a container containing an object to be cooked from below; and an infrared sensor having a plurality of pixels for detecting temperature information at predetermined time intervals. In this heating control method, a set value is set according to a disturbance factor generated in the infrared sensor, a dynamic threshold value is set based on the maximum detection value in the container of the infrared sensor and the set value, and the dynamic The number of pixels exceeding the threshold value is measured, the cooking condition is determined based on the measured number of pixels, and the heating amount of the one or more heating means is increased or decreased based on the determined cooking condition.

Further, the present invention can provide a heating control method in which a sign of boiling over is determined as the cooking situation when the measured increase in the number of pixels exceeds a predetermined value.

Moreover, the present invention can provide a heating control method in which boiling is determined as the cooking state when the measured change in the number of pixels per unit time saturates.

Moreover, the present invention can provide a heating control method in which the set value is changed according to temperature change in the temperature information obtained by the infrared sensor for a predetermined period.

Further, the present invention can provide a heating control method that divides the plurality of pixels corresponding to each of the plurality of heating means and measures the number of pixels corresponding to each of the plurality of heating means.

According to the present invention, even if there is a disturbance factor such as steam, it is possible to suppress a decrease in detection accuracy, improve the accuracy of determining the cooking situation, and perform appropriate heating amount control according to the cooking situation. A heating control method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which shows schematic structure of the heating cooker in Embodiment 1 of this invention. FIG. 4 shows the problem of steam and the problem of detection value vibration in Embodiment 1. FIG. FIG. 10 is a diagram showing a change in the number of pixels of the infrared sensor when boiling over occurs in the first embodiment; A diagram showing an operation example of the method for judging the cooking situation according to the first embodiment. The side view which shows schematic structure of the heating cooker in Embodiment 2 of this invention. FIG. 10 is a diagram showing a difference in measurement categories depending on the installation angle of the infrared sensor according to the second embodiment;

A first invention includes one or more heating means for heating a container containing an object to be cooked from below; an infrared sensor equipped with a plurality of pixels for detecting temperature information at predetermined time intervals; a communication unit for wired or wireless communication of the temperature information obtained by the infrared sensor; and disturbance factors occurring in the infrared sensor. a disturbance factor tolerance setting means for setting a set value in accordance with the above; means, cooking condition determining means for determining the cooking condition based on the measurement result of the pixel number measuring means, and heating control means for increasing or decreasing the amount of heating based on the determination result of the cooking condition determining means. I can provide equipment.

A second aspect of the present invention is a heating cooker in which the cooking condition determining means detects a sign of boiling over when an increase in the number of pixels measured by the pixel number measuring means exceeds a predetermined value.

A third aspect of the present invention provides a heating cooker in which the cooking situation determining means detects boiling when the change per unit time of the number of pixels measured by the pixel number measuring means saturates. can.

A fourth aspect of the present invention can provide a heating cooker in which the set value of the disturbance factor tolerance setting means is changed according to the temperature change of the temperature information obtained by the infrared sensor for a predetermined period. .

A fifth aspect of the present invention comprises the plurality of heating means, measurement pixel division setting means for dividing the plurality of pixels corresponding to each of the plurality of heating means, and It is possible to provide a cooking device that measures the number of pixels corresponding to each of the means.

A sixth aspect of the invention includes one or more heating means for heating a container containing an object to be cooked from below; and an infrared sensor having a plurality of pixels for detecting temperature information at predetermined time intervals. In this heating control method, a set value is set according to a disturbance factor generated in the infrared sensor, a dynamic threshold value is set based on the maximum detection value in the container of the infrared sensor and the set value, and the dynamic The number of pixels exceeding the threshold value is measured, the cooking condition is determined based on the measured number of pixels, and the heating amount of the one or more heating means is increased or decreased based on the determined cooking condition.

A seventh aspect of the present invention can provide a heating control method in which a sign of boiling over is determined as the cooking situation when the measured increase in the number of pixels exceeds a predetermined value.

The eighth invention can provide a heating control method in which boiling is determined as the cooking state when the measured change in the number of pixels per unit time is saturated.

A ninth aspect of the present invention can provide a heating control method in which the set value is changed according to temperature change in the temperature information obtained by the infrared sensor for a predetermined period.

A tenth invention can provide a heating control method that divides the plurality of pixels corresponding to each of the plurality of heating means and measures the number of pixels corresponding to each of the plurality of heating means.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram showing the main parts of a heating cooker 101 according to Embodiment 1 of the present invention. In FIG. 1, a heating cooker 101 is composed of a sensor portion 102 and a main body portion 103, 104 is an object to be cooked, 105 is a container for storing the object 104 to be cooked, 106 is one or more heating means, and 107 is an infrared sensor provided substantially above the heating means 106 and provided with a plurality of pixels for detecting temperature information on the heating means 106 at predetermined time intervals; 109 is a main unit side communication unit; 110 is disturbance factor tolerance setting means for considering disturbance factors occurring in the infrared sensor 107; A pixel number measuring means for determining a dynamic threshold value based on the set value of , and measuring the number of pixels exceeding the determined dynamic threshold value. Situation judging means, 113 heating control means for increasing or decreasing the amount of heating based on the judgment result of the cooking situation judging means and controlling the overall operation of the heating cooker 101, and 114 a top plate on which the container 105 is placed. . The infrared sensor 107 may be provided directly above the heating means 106 or may be provided obliquely upward.

Here, the sensor section 102 is composed of an infrared sensor 107 and a sensor side communication section 108 . The main unit 103 is composed of a main unit side communication unit 109 , disturbance factor tolerance setting means 110 , pixel number measuring means 111 , cooking condition determining means 112 and heating control means 113 .

Also, the container 105 is a pan made of metal. Further, the heating means 106 is composed of a heating coil and an inverter for heating a metal pot by induction heating. The infrared sensor 107 is divided into a plurality of grid-like pixel regions (for example, 32×32=1024 pixels), and each of the divided pixel regions detects temperature by an infrared detection element, and detects the detected temperature and the detected pixel position. It is configured so that it can be provided through communication means. The sensor unit side communication unit 108 and the main body unit side communication unit 109 are configured by wireless communication means, and are configured to be able to transmit and receive data mutually. Further, the disturbance factor tolerance setting means 110, the pixel number measuring means 111, the cooking state determining means 112, and the heating control means 113 are microcomputers (not shown) having a CPU (Central Processing Unit), memory, input/output interface, etc. is configured using Also, the top plate 114 is made of a glass plate.

The operation and effect of the heating cooker configured as described above will be described below.

In the explanation, contents from basic operation to application will be explained in the following order.
(1) Disturbance factor issues (2) Disturbance factor tolerance consideration method (3) Cooking situation judgment method (4) Overall operation

(1) Issues of Disturbance Factors When measuring the temperature of the container 105 heated by the heating cooker, the method of inserting a contact sensor into the container 105 is the easiest and most accurate method. However, since the cooker handles food, users have a strong sense of resistance to contact sensors from the viewpoints of psychology, sanitation, and cooking workability, and non-contact sensors such as infrared sensors are desired. On the other hand, the infrared sensor has the problem of steam that cannot be avoided in the process of cooking, and the problem of detection value oscillation. The problem of steam is that the presence of steam (or water vapor) between the infrared sensor and the object to be measured disturbs the energy radiated from the object to be measured, thereby impairing the accuracy of the temperature of the food being cooked. The problem of detection value oscillation is the problem of the detection value oscillation of cost band infrared sensors used in consumer devices. In such an infrared sensor, the detected value oscillates with amplitude due to the influence of disturbance noise caused by various factors.

FIG. 2 is a diagram showing the problem of steam and the problem of detection value vibration. FIG. 2(a) shows a state in which water as a cooking object 104 is placed in a container 105, heated by a heating means 106 and steam is generated by boiling, and a ventilation fan capable of changing the steam condition is turned on ( It shows the detection values when the infrared sensor 107 monitors the state when the steam is small)/OFF (steam is large). Here, in order to clarify the influence of steam, the detection values of the infrared sensor shown in FIG. there is The difference between the amplitude of the detected value and the behavior of the ventilation fan ON/OFF in FIG. 2 clearly shows the problem of steam and the problem of vibration of the detected value.

Here, focusing on the difference between ON/OFF of the ventilation fan in FIG. 2(a), it can be seen that the maximum value and the minimum value of the influence of steam greatly change in the same phase. Thus, for example, it can be seen that when the maximum value decreases, the minimum value also decreases. Also, the self-oscillation appears as an oscillation of the detection value that always exists like white noise even under the influence of the steam.

From these, it can be confirmed from FIG. 2(a) that the influence of the disturbance factor is distributed with a certain width from the observed maximum value.

(2) Method of Considering Disturbance Factor Tolerance The detected values shown in FIG. 2(a) originally represent the same phenomenon of boiling, and are detected values indicating the same state except for the disturbance factor. Therefore, the concept of disturbance factor tolerance is introduced so that the cooking condition determination means 112 can regard them as the same. Here, in order for the cooking condition determination means 112 to determine the cooking condition such as the sign of boiling over or the boiling point, it is not necessary to observe the temperature information itself. For example, in order to detect a “sign of boiling over” in which the volume inside the container 105 increases due to an increase in air bubbles, it can be detected indirectly by detecting an increase in the number of pixels showing the same temperature. In order to detect "reaching the boiling point" that is clipped to a temperature determined by physical properties accompanying a phase change, it can be detected indirectly by detecting that the change in the number of measured pixels has reached equilibrium. As a specific configuration for performing disturbance factor removal based on the concept of this disturbance factor tolerance, a disturbance factor tolerance setting means 110 that considers a set value for recognizing the same detection value affected by a disturbance factor. , a pixel number measuring means 111 for determining a dynamic threshold value based on the maximum detection value in the container 105 of the infrared sensor 107 and the setting value of the disturbance factor tolerance setting means 110, and measuring the number of pixels exceeding the determined dynamic threshold value. is used to remove the influence of disturbance factors.

Assuming that the temperature tolerance setting value of the disturbance factor tolerance setting means 110 is 20 degrees in FIG. The state of the number of pixels measured using 20 degrees is shown. In this embodiment, FIG. 2B shows the number of pixels from the maximum detection value to the value obtained by subtracting 20 degrees from the maximum detection value. That is, in FIG. 2(b), the dynamic threshold is a value obtained by subtracting 20 degrees from the maximum detection value, and FIG. 2(b) shows the number of pixels exhibiting values exceeding the dynamic threshold. As shown in FIG. 2B, it can be confirmed that the change due to the disturbance factor can be effectively removed from the detection value of the infrared sensor 107 when the ventilation fan is turned ON/OFF.

In order for the cooking condition judging means 112 to judge the cooking condition more accurately, it is desirable that the setting value of the disturbance factor tolerance setting means 110 is an optimum value. It is possible. In order to optimize the setting value, first, when the cooking situation determination means 112 monitors the change in the number of pixels by the pixel number measurement means 111, the maximum detected temperature of each pixel of the infrared sensor 107 in a predetermined time (for example, 30 seconds) • Simultaneously monitor the minimum. Here, when the difference between the maximum and minimum values of the temperature inside the general container 105 is smaller than a predetermined value (for example, 10 degrees), a ventilation fan (not shown) for discharging steam or the like is installed near the heating cooker 101, It is determined that the influence of disturbance factors such as steam is small, and the set value of the disturbance factor tolerance setting means 110 is changed (for example, from 20 degrees to 10 degrees). By optimizing the setting value for allowing the influence of the disturbance factor by such an operation, it becomes possible to judge the cooking situation with higher accuracy.

(3) Cooking state determination method Fig. 3 shows the infrared rays near the container 105 when water as the object 104 to be cooked is placed in the container 105 and heated by the heating means 106 to reach a boiling state (Fig. 3(c)). The detection value of each pixel of the sensor 107 (Fig. 3(a)) and the vicinity of the container 105 when the water surface of the cooking object 104 rises to the point just before boiling over (Fig. 3(d)) after the somen noodles are added after boiling. Detected values (FIG. 3B) of each pixel of the infrared sensor 107 are shown. In FIG. 3, using the concept of the disturbance factor tolerance described above, the set value of the disturbance factor tolerance setting means 110 is 10 degrees, and the pixels measured by the pixel number measuring means 111 are indicated by thick lines. Here, by comparing the numbers of pixels surrounded by thick lines in FIGS. 3A and 3B, the signs of boilover can be intuitively understood. From this, it can be confirmed that a sign of boiling over can be detected by judging the change in the number of pixels measured by the pixel number measuring means 111 by the cooking condition judging means 112 . The numerical values shown in FIGS. 3(a) and 3(b) represent the temperature detected by the infrared sensor 107, but even if they are in a boiling state, they show the boiling point of 100 degrees due to the influence of the distance. No numbers. From these points as well, the practical effectiveness of the technique using the dynamic threshold value using the approximate maximum detection value of the infrared sensor 107 can be understood.

FIG. 4B is a diagram showing the detection values of the infrared sensor 107 until just before boiling over occurs after boiling is reached, and FIG. FIG. 10 is a diagram showing the result of removing the influence of a disturbance factor from the detected value by means of the disturbance factor tolerance setting means 110 and the pixel number measuring means 111 described above. In addition, in FIG. 4B, if the detection values of all the pixels constituting the infrared sensor 107 are displayed, they will be filled with lines and the change will not be understood. Pixels close to the water level line that forms the boundary with the object 104 are selected and displayed.

Here, the situation shown in FIG. 4 is as follows. Water as the cooking object 104 is put into the container 105 and heating is started by the heating means 106 (A in FIG. 4(a)). When the temperature outside the container reaches the highest temperature immediately after the start of heating, the number of pixels exceeding the dynamic threshold continues to decrease until the highest temperature of the infrared sensor 107 reaches the temperature of the cooking object 104 inside the container 105 ( B) of FIG. 4(a). After that, when the maximum temperature of the infrared sensor 107 reaches the temperature of the cooking object in the container, the pixel number measuring means 111 counts the temperature indicating the pixel group indicating the cooking object 104 which is stably convected. Therefore, the number of pixels remains constant (B to C in FIG. 4A). As the heating by the heating means 106 progresses and bubbles begin to form on the heating surface of the bottom of the container 105 (C in FIG. 4A), the water that has reached the boiling point rises to the water surface together with the vaporized bubbles, resulting in a large temperature difference. Since a portion appears, the number of measured pixels begins to decrease (C to D in FIG. 4(a)). When the heating progresses further and air bubbles are generated stably on the entire lower surface of the container 105, the surface temperature of the object 104 to be cooked is made uniform, and the decrease in the number of measurement pixels stops (D in FIG. 4A). ). After that, the number of pixels exceeding the dynamic threshold rises gently until the whole reaches the boiling point (D to E in FIG. 4A), and the entire inside of the container 105 reaches the boiling point (E in FIG. 4A). ). In such a situation where the entire body is boiling, the temperature is clipped at the boiling point, and the temporal change in the number of pixels is saturated and exhibits an equilibrium state (E to F in FIG. 4(a)). Here, when somen noodles are added as the object 104 to be cooked in the container 105 at the timing of F in FIG. After a temporary decrease, the effect is recovered by continuous heating by the heating means 106 (F to G in FIG. 4(a)). At this time, due to the influence of starch or the like eluted from somen noodles as the object 104 to be cooked, a large amount of bubbles generated by boiling remain in the container 105 without disappearing. , just before boiling over occurs (H in FIG. 4(a)).

At this time, the cooking condition determination means 112 determines the characteristics of the condition (E to F in FIG. 4A) exhibiting an equilibrium state in which time change saturation occurs after boiling is reached (for example, when the maximum temperature in the container 105 is 80 degrees or higher). , approximately the same number of pixels continues for 5 seconds), it is possible to determine whether boiling has occurred.

When the cooking state determination means 112 detects that boiling has been reached, the heating control means 113 performs heating control such as switching to heat-retaining power to prevent unnecessary evaporation of water in the heating cooker 101 and save energy for maintaining boiling. can be

In addition, the cooking situation determination means 112 increases the number of pixels indicating the situation of signs of boiling over (G ~H) (for example, when the maximum temperature in the container 105 is 80 degrees or more, the number of pixels increases by 5% or more than the number of pixels when boiling is reached), the sign of boiling over can be detected.

When the cooking status determination means 112 detects a sign of boiling over, the heating control means 113 performs duty heating control for preventing boiling over (control to change the heating power at a constant cycle and at a constant time interval), and the heating cooker 101 can continue cooking while preventing boiling over.

(4) Overall Operation When the user places the container 105 containing the object 104 to be cooked on the top plate 114 and issues an instruction to start heating, the heating control means 113 causes the heating means 106 to heat the container 105 . conduct. The infrared sensor 107 acquires temperature information of the visual field range covered by the sensor pixels including the inside of the container 105, and sends the detected temperature and the detected temperature to the pixel number measuring means 111 via the sensor unit side communication unit 108 and the main unit side communication unit 109. Transmits pixel position information. The pixel number measuring means 111 is based on the maximum detection value inside the container 105 (which dynamically changes due to steam or sensor value vibration) of the infrared sensor 107 and the set value (for example, 20 degrees) of the disturbance factor tolerance setting means 110. A determined dynamic threshold is computed and the number of pixels exceeding this dynamic threshold is counted. Here, the cooking situation determination means 112 determines whether or not the change in the number of pixels measured by the pixel number measurement means 111 corresponds to the above-described situation of boiling over or reaching boiling. duty heating control (control to change the heating power at a constant time interval at a constant cycle) or heating control such as transition to heat retention power after reaching boiling.

As described above, in the present embodiment, the number of pixels exceeding the dynamic threshold value determined from the maximum detection value in the container 105 of the infrared sensor 107 and the setting value of the disturbance factor tolerance setting means 110 is measured. By judging the measurement result of the measuring means 111 by the cooking condition judging means 112, it is possible to provide the heating cooker 101 in which the heating control means 113 controls the amount of heating according to the judgment of the cooking condition.

In addition, even if there is a disturbance factor such as steam, by monitoring an increase change in the number of pixels measured by the pixel number measurement means 111, the cooking situation determination means 112 can detect the sign of boiling over. can provide.

In addition, even if there is a disturbance factor such as steam, by monitoring the time change saturation of the number of pixels measured by the pixel number measurement means 111, the cooking situation determination means 112 can detect boiling. can provide.

In addition, even if the disturbance factor such as steam varies depending on the capacity and operating conditions of the ventilating fan installed near the heating cooker 101 for discharging steam, the allowable difference set value of the disturbance factor allowable difference setting means 110 does not change the temperature for a predetermined period. It is possible to provide the heat cooker 101 that can respond by being changed according to.

(Embodiment 2)
A heating cooker according to Embodiment 2 of the present invention will be described below (FIG. 5). The heating cooker of the second embodiment differs greatly from the heating cooker of the first embodiment described above in that the measurement division setting means 501 and the cooking state judgment for each measurement division based on the information of the measurement division setting means 501 are performed. The difference is that the cooking status determining means 502 is provided. The measurement category setting means 501 and the cooking status determination means 502 can be configured by using a microcomputer (not shown). Note that the cooking situation determining means 502 performs the same operation as the cooking situation determining means 112 in Embodiment 1 except that the classification setting information of the measurement classification setting means 501 is used.

In the following description of the heating cooker of Embodiment 2, components having the same functions and configurations as those of the components of the heating cooker of Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be given in the embodiment. 1 apply.

The measurement division setting means 501 defines the pixel range used when the cooking situation determination means 502 monitors the pixel number change by the pixel number measuring means 111 for each of the plurality of heating means 106 when there are a plurality of heating means 106. It has the function to As described above, the dynamic threshold value determined by the pixel number measuring means 111 uses the maximum observed value in the container 105 of the infrared sensor 107, so if there are a plurality of heating means 106, the maximum observed value is set for each. It is necessary to make it configurable.

Here, FIG. 6(a) shows a situation in which the infrared sensor 107 monitors the heating status of the heating means 106 from almost directly above, and FIG. 6(b) shows a situation in which the heating status of the heating means 106 is monitored from obliquely above. . 6A and 6B, if the installation angle of the infrared sensor 107 is different, the pixels of the infrared sensor 107 used for monitoring the heating means 106a to 106c are also different (measurement section 601a ~601c). When the infrared sensor 107 is installed, the measurement division setting means 501 prompts the user to set the measurement divisions 601a to 601c associated with the heating means 106a to 106c, respectively, and stores the pixel positions belonging to the measurement divisions 601a to 601c.

After setting the measurement categories, the cooking situation determination means 502 causes the pixel number measurement means 111 to measure the number of pixels based on the category setting information of the measurement category setting means 501 when performing the above-described cooking situation judgment, thereby determining the cooking situation. Judgment is made, and the heating control by the heating control means 113 is also executed for each heating means 106 .

As described above, in the present embodiment, the measurement division setting unit 501 is provided, and the number of pixels is measured for each heating unit 106. Therefore, even if there are a plurality of heating units 106, each heating unit 106 It is possible to provide a heating cooker capable of judging the cooking situation.

Although the invention of the present disclosure has been described above with reference to the above-described embodiments, the invention of the present disclosure is not limited to the above-described embodiments.

For example, in the present embodiment, the main unit 103 executes the setting of the tolerance setting value, the setting of the dynamic threshold value, the measurement of the number of pixels, the judgment of the cooking state, etc. It may be executed by the unit 102, may be executed by the server, or may be executed by another terminal.

Also, in the present embodiment, the dynamic threshold value is the value obtained by subtracting the allowable difference setting value from the maximum detected value, but this value may be multiplied by a coefficient or added with another value. That is, the dynamic threshold may be increased or decreased according to the value obtained by subtracting the tolerance set value from the maximum detected value.

Although the present disclosure has been fully described in connection with preferred embodiments and with reference to the accompanying drawings, various variations and modifications will become apparent to those skilled in the art. Such variations and modifications are to be included therein insofar as they do not depart from the scope of the present disclosure by the appended claims. Also, combinations of elements and changes in order of elements in each embodiment may be implemented without departing from the scope and spirit of the present disclosure.

INDUSTRIAL APPLICABILITY As described above, the present invention can be applied to a situation in which dynamic disturbance factors are excluded in a configuration in which an infrared sensor determines the status of a monitored object in a situation where dynamic disturbance factors are present. is.

REFERENCE SIGNS LIST 101 heating cooker 102 sensor unit 103 main unit 104 object to be cooked 105 container 106 heating means 107 infrared sensor 108 sensor unit side communication unit 109 main unit side communication unit 110 disturbance factor tolerance setting means 111 pixel number measuring means 112 cooking situation judgment Means 113 Heating control means 114 Top plate 501 Measurement classification setting means 502 Cooking situation determination means 601a-c Measurement classification

Claims (10)

one or more heating means for heating the container containing the object to be cooked from below;
an infrared sensor provided above the one or more heating means and having a plurality of pixels for detecting temperature information on the one or more heating means at predetermined time intervals;
a communication unit that communicates the temperature information obtained by the infrared sensor in a wired or wireless manner;
disturbance factor tolerance setting means for setting a set value according to a disturbance factor occurring in the infrared sensor;
a pixel number measuring means for measuring the number of pixels exceeding a dynamic threshold determined based on the maximum detection value in the container of the infrared sensor and the set value;
Cooking situation judgment means for judging the cooking situation based on the measurement result of the pixel number measuring means;
heating control means for increasing or decreasing the amount of heating based on the judgment result of the cooking situation judgment means;
Heating cooker with. 2. The heating cooker according to claim 1, wherein said cooking condition judging means detects a sign of boiling over when an increase in the number of pixels measured by said pixel number measuring means exceeds a predetermined value. 3. The heating cooker according to claim 1, wherein said cooking condition determining means detects boiling when the number of pixels measured by said pixel number measuring means saturates per unit time. 4. The set value of the disturbance factor tolerance setting means is changed according to the temperature change of the temperature information obtained by the infrared sensor for a predetermined period. The heating cooker described in . comprising the plurality of heating means,
A measurement pixel division setting means for dividing the plurality of pixels corresponding to each of the plurality of heating means is provided, and the pixel number measurement means measures the number of pixels corresponding to each of the plurality of heating means. The heating cooker according to any one of claims 1 to 4. one or more heating means for heating the container containing the object to be cooked from below;
an infrared sensor provided above the one or more heating means and having a plurality of pixels for detecting temperature information on the one or more heating means at predetermined time intervals. A heating control method of
setting a set value according to a disturbance factor occurring in the infrared sensor;
setting a dynamic threshold based on the maximum detection value in the container of the infrared sensor and the set value;
measuring the number of pixels exceeding the dynamic threshold;
Judging the cooking situation based on the measured number of pixels,
A heating control method for increasing or decreasing a heating amount of the one or more heating means based on the determined cooking situation. 7. The heating control method according to claim 6, wherein when the measured increase in the number of pixels exceeds a predetermined value, a sign of boiling over is determined as the cooking situation. 8. The heating control method according to claim 6 or 7, wherein boiling is determined as the cooking state when the measured change in the number of pixels per unit time saturates. 9. The heating control method according to any one of claims 6 to 8, wherein the set value is changed in accordance with a temperature change in the temperature information obtained by the infrared sensor for a predetermined period. The heating cooker comprises the plurality of heating means,
10. The method according to any one of claims 6 to 9, wherein the plurality of pixels are divided corresponding to each of the plurality of heating means, and the number of pixels corresponding to each of the plurality of heating means is measured. Heating control method as described.

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