JP2016202680A - Heating cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooking device capable of performing an automatic temperature control by detecting a temperature of a cooking container and thereby determining a material of the cooking container accurately.SOLUTION: The heating cooking device includes: a gas burner; a temperature sensor 17 measuring a temperature of a cooking container; a temperature input section 25 setting a heating temperature; and a control device 4 performing automatic temperature control increasing/decreasing a heating amount of the gas burner so that a detection temperature becomes a set temperature set by the temperature input section 25 on the basis of the detection temperature. The heating cooking device further includes: a first determination section 7 determining a material of the cooking container on the basis of a temperature gradient at a heating initial time calculated by measurement results by the temperature sensor 17; and a second determination section 8 switching a heating amount to be reduced at a time of reaching a determination temperature set at a lower temperature than the set temperature, comparing a degree of a temperature change measured by the temperature sensor 17 within a predetermined time from a time point of switching the heating amount to be reduced with a determination reference value predetermined according to the material of the cooking container determined by the first determination section 7, and thereby determining again the material of the cooking container.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cooking device that heats and cooks a cooking container containing an object to be cooked by a heating means.

  A gas burner that heats a cooking container such as a pan containing the food to be cooked, a temperature sensor that measures the temperature of the bottom of the cooking container, and a control means that controls the combustion of the gas burner, for example, cooking by user input When the heating temperature of the container is set, the control means increases or decreases the gas flow rate based on the detected temperature measured by the temperature sensor so that the temperature of the cooking object in the cooking container maintains the set temperature. A cooking device that performs automatic heating amount adjustment control is known (Patent Document 1).

  Cooking containers used for cooking have different thermal conductivities, specific heats, and heat capacities depending on the materials, and therefore the degree of temperature rise of the cooking containers varies even with the same thermal power (heating amount). Therefore, when measuring the temperature of the object to be heated inside the cooking container by detecting the temperature of the bottom of the cooking container with a temperature sensor, the temperature of the object to be heated and the temperature of the bottom of the cooking container are large. There is a difference, or even if the heating power is reduced to a small temperature due to reaching the set temperature, the degree of temperature drop may be different.

  In this type of cooking device, for example, when oil is used as an object to be cooked like fried food cooking, in order to solve the problem that the temperature of the oil during temperature adjustment varies depending on the material of the cooking container, The material of the cooking container is determined by the initial temperature rise gradient of the temperature sensor after ignition. For example, when the oil temperature overshoot is large after reducing the thermal power, such as an iron pan, thermal power switching control that reduces the thermal power when it reaches a slightly lower temperature than the ON-OFF control near the set temperature. If the effect of overshoot is small, such as an aluminum pan, the thermal power switching control like an iron pan is not performed.

Japanese Patent No. 4014313

In the conventional one, the temperature gradient in the initial stage of heating is certainly different between the iron pan and the aluminum pan, and it is convenient to measure the initial temperature gradient in order to distinguish the material of the pan. However, since the temperature gradient in the initial stage of heating is also affected by the difference in the amount of heating and the amount of oil, there is a possibility of misjudgment when the material of the pan is determined only by the initial temperature gradient.
For example, if you misjudged an aluminum pan because of the small amount of oil even though you are using an iron pan, it will operate with temperature control for the aluminum pan even though it is an iron pan. There is a possibility that the temperature of the oil becomes too large with respect to the temperature. In addition, when the amount of oil is large and the amount of heating is small in spite of the use of an aluminum pan, the temperature gradient is small, so that it may be determined as an iron pan.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooking device capable of automatically adjusting the temperature by detecting the temperature of the cooking container and correctly determining the material of the cooking container.

The cooking device of the present invention is
Heating means for heating the cooking vessel;
Temperature measuring means for measuring the temperature of the cooking container;
Temperature input means for setting the heating temperature;
Control means for performing automatic heating amount adjustment control for increasing or decreasing the heating amount of the heating means so that the detected temperature becomes a set temperature set by the temperature input means based on the detected temperature measured by the temperature measuring means;
A cooking device comprising:
A first determination unit that determines a material of the cooking container based on a temperature gradient at an initial stage of heating calculated from a measurement result of the temperature measurement unit;
The temperature measured by the temperature measuring means within a predetermined time from when the heating amount is switched to become smaller when the judgment temperature set at a temperature lower than the preset temperature is reached And a second determination unit that re-determines the material of the cooking container by comparing the degree of change with a determination reference value set in advance according to the material of the cooking container determined by the first determination unit. .

  According to the cooking device of the present invention, after the material of the cooking container is determined by the first determination unit, the determination is further performed using the result determined by the first determination unit in the second determination unit. The accuracy of the material determination can be improved, and the control for automatically adjusting the heating temperature of the object to be cooked can be performed as accurately as possible.

The second determination unit of the control means of the heating cooking apparatus of the present invention,
Set a judgment temperature lower than the set temperature, switch the heating amount to be small when the judgment temperature is reached, and change the temperature measured by the temperature measuring means within a predetermined time from the point of switching to a small heating amount. The degree is compared with the determination reference value, the material of the cooking container is determined again, and when it is determined that the cooking container is made of a material having high thermal conductivity, the determination is performed again by raising the set temperature by a predetermined temperature. It is preferable to configure to perform at least once.

  According to such a configuration, when the second determination unit performs re-determination one or more times, and the second determination unit determines that the cooking container is made of a material having high thermal conductivity, the set temperature is increased by a predetermined temperature. Therefore, it is possible to set the set temperature according to the material of the cooking container. That is, when the material of the cooking container is a material having high thermal conductivity, the temperature of the object to be cooked remains lower than the temperature of the cooking container from the start of heating until the temperature of the cooking container reaches the set temperature. As the temperature of the cooking container reaches the set temperature, the temperature of the object to be cooked does not reach the set temperature when the temperature of the cooking container reaches the set temperature. Even if it is a material with a large thermal conductivity, the temperature of the object to be cooked can be controlled at a temperature close to the set temperature set initially.

Furthermore, the second determination unit of the control means of the cooking device of the present invention is
In the first re-determination, if it is determined that the cooking container is made of a material having a high thermal conductivity and the second set temperature is reset, and a temperature lower than the second set temperature is set as the re-determination temperature, the heating is small. The heating amount is switched from a larger heating amount to a larger heating amount, and when the redetermination temperature is reached after the minimum heating time has elapsed since the switching of the heating amount, the heating amount is switched from a larger heating amount to a smaller heating amount to reduce the heating amount. Cooking by comparing the degree of temperature change measured by the temperature measuring means within a predetermined time from the time of switching as a determination reference value for redetermination set in advance according to the material of the cooking container determined by the first determination unit It is preferable that the material of the container is determined again.

  According to the cooking device of the present invention, when the second re-determination result in the second determination unit determines that the cooking container is made of a material having a high thermal conductivity, the second determination unit determines the set temperature. Increase the specified temperature and reset the second set temperature, set the redetermination temperature, switch from a small heating amount to a larger heating amount, and switch to the redetermination temperature after the minimum heating time has elapsed since this heating amount was switched. When it reaches, the second re-determination is performed to determine the material of the cooking container based on the determination reference value. Therefore, when the re-determination temperature is reached before the minimum heating time elapses, the first re-determination result is maintained. Thus, the automatic heating amount adjustment control can be performed at the second set temperature, and the determination accuracy of the cooking container can be further improved.

The cooking device of the present invention is more preferably
When the second determination unit determines that the cooking container is made of a material having a high thermal conductivity, the set temperature is increased by a predetermined temperature and reset.
It is preferable that the automatic heating amount adjustment control is started based on the reset temperature.

  According to such a configuration, when the material of the cooking container is a material having a high thermal conductivity, the temperature of the object to be cooked does not reach the set temperature when the temperature of the cooking container reaches the set temperature. However, by setting the set temperature high again, the temperature of the object to be cooked can be controlled at a temperature close to the set temperature that was initially set. Also, the accuracy of the automatic heating amount adjustment control can be improved.

In addition, the cooking device of the present invention is
The comparison between the determination reference value of the second determination and the degree of temperature change based on the detected temperature was calculated by calculating a temperature difference from a predetermined time every fixed time after switching to a small heating amount and elapse of a predetermined time. The temperature difference is compared with the criterion value at regular intervals, and if the temperature difference falls below the criterion value within the set comparison time, it is determined that the cooking container is made of a material with high thermal conductivity at that time. More preferably, it is configured to do so.

  By configuring in this way, not only the temperature difference at a specific point in time but also the degree of temperature change is determined every fixed time, so not only the reliability of the determination is increased, but also the set comparison Since it can be judged that the cooking container is made of a material with high thermal conductivity when the time falls below the judgment standard value without waiting for the time to elapse, the judgment time for comparison with the judgment standard value can be shortened, and the influence on cooking characteristics Can be reduced.

The cooking device of the present invention is
The setting of the determination reference value of the second determination is divided into a case where the temperature difference after the elapse of a predetermined time after becoming a small heating amount is larger than the predetermined temperature difference and a case where the temperature difference is small.
It is also possible to configure so that the determination reference value is set lower when it is smaller than when it is larger.
With this configuration, the reliability of determination is further increased.

The cooking device of the present invention is
Provided with an informing means for informing the set temperature arrival,
A cooking container that is not finally determined to be a cooking container having a high thermal conductivity by the second determination unit is set by the notification means when the set temperature set at the time of the determination is detected by the temperature measuring means. While alerting you to temperature,
The cooking container finally determined to be a cooking container made of a material having a high thermal conductivity in the second determination unit is after a predetermined time has elapsed since the set temperature set at the time of determination is detected by the temperature measuring means, or It is preferable to adopt a configuration in which control is performed so as to notify the arrival of the set temperature from the notification means when a predetermined condition is satisfied.

By configuring in this way, when a cooking container made of a material having a high thermal conductivity is used, even if the temperature of the cooking container reaches the set temperature, the food to be cooked whose temperature rises to 100 ° C. or higher by heating such as oil It is possible to improve notification at a temperature lower than the set temperature.
That is, when a cooking container made of a material having a high thermal conductivity is used, the temperature of the temperature measuring means reaches the set temperature faster than the object to be cooked. Alternatively, by notifying when the predetermined condition is satisfied, it is possible to notify the temperature of the object to be cooked as close to the set temperature as possible.

  According to the heating cooking apparatus which concerns on this invention, regardless of the material of a cooking container, it becomes possible to determine a material automatically and to heat a to-be-cooked object at the temperature close | similar to preset temperature, adjusting automatic temperature. .

It is a perspective view showing the whole gas stove composition concerning the embodiment of the present invention. It is a block diagram which shows the structure of the control apparatus of the gas stove which concerns on embodiment of this invention. In this embodiment, it is a graph which shows the temperature change of a pan and oil at the time of using an aluminum pan as a cooking container, and using an iron pan. In this embodiment, it is a graph which shows the temperature change of the cooking container at the time of the 1st determination and 2nd determination which determine the material of a cooking container, and shows the material of a cooking container according to a temperature change. In this embodiment, it is the graph which showed in detail the temperature change of the cooking container at the time of the 2nd determination of FIG. It is a graph which shows the temperature change within the predetermined time when the cooking container of this embodiment is iron. It is a graph which shows the temperature change within the predetermined time when the cooking container of this embodiment is aluminum. It is a graph of the temperature change which shows the thermal-power switching temperature and alerting | reporting timing for performing automatic heating amount adjustment control when a cooking container is determined with aluminum by the 2nd determination of this embodiment. It is a graph of the temperature change which shows the thermal-power switching temperature and notification timing for performing automatic heating amount adjustment control when the cooking container of this embodiment is determined to be iron. It is a flowchart for performing the 1st determination of the gas stove which concerns on this embodiment. It is a flowchart for performing the 1st time of the 2nd determination of the gas stove which concerns on this embodiment. It is a flowchart for performing the 2nd determination of the 2nd determination of the gas stove which concerns on this embodiment. It is a flowchart for performing automatic heating amount adjustment control in case the pan of the gas stove concerning this embodiment is aluminum. It is a flowchart for performing temperature automatic heating amount adjustment control in case the pan of the gas stove concerning this embodiment is iron. It is a graph which shows other embodiment of the thermal power control of the gas stove which concerns on this embodiment. It is a graph which shows other embodiment of the thermal power control of the gas stove which concerns on this embodiment.

  Below, the gas stove as a heat cooking apparatus which concerns on embodiment of this invention is demonstrated, referring an accompanying drawing.

  A gas stove 1 shown in FIG. 1 is a built-in type in which a stove body 13 in which three (plural) gas burners (heating means of the present invention) 11 and a grill device 12 are incorporated is dropped into an opening of a countertop. It is called.

  The gas stove 1 is provided with a rectangular top plate 14 so as to cover the upper open portion of the stove body 13, and the gas burner 11 is exposed on the top surface of the top plate 14. Five virtues 15 are placed around each gas burner 11 on the top plate 14. A display window 16 is formed in the center of the front portion of the top plate 14 to display the heating temperature and mode set by the user of each gas burner 11.

  At the center of each gas burner 11, there is provided a temperature sensor 17 corresponding to the temperature measuring means of the present invention in which the heat sensitive part at the tip contacts the bottom of a cooking container such as a pan to measure the bottom temperature of the cooking container. The temperature sensor 17 is supported by the gas burner 11 so as to be movable up and down.

  The stove main body 13 is formed in a rectangular box shape with the top open, and a grill door 18 of the grill device 12 is attached to the front of the stove main body 13 and is used for ignition and heating power adjustment of each gas burner 11. A button 21 and a button 22 for igniting the gas burner in the grill device 12 and adjusting the heating power are provided.

  Further, as shown in FIG. 1, the gas stove 1 is provided with an operation unit 23 for a storage type gas burner and an operation unit 24 for a grill device, and these operation units 23 and 24 have heating temperatures and cooking modes. It is possible to set various cooking conditions such as cooking time. FIG. 2 shows a temperature input unit 25 (heating input means of the present invention) for setting the heating temperature or setting the cooking mode in the operation unit 23 for the gas burner.

  Buttons 21 and 22 for performing ignition and heating power adjustment of each gas burner 11 and grill device 12 are not shown, but are disposed between the gas pipe and the gas burner 11, and gas from the gas pipe to the gas burner 11 is provided. It is connected to a valve device that controls the supply.

  Although the valve device is not shown, an electromagnetic safety valve driven by the operation of the buttons 21 and 22, an original gas valve, and a rotating disk for adjusting the gas amount are housed in a valve housing in which an internal gas passage is formed. The gas introduced into the internal passage is sent to the gas burner 11 by operating the buttons 21 and 22.

  Further, in the gas supply path between the valve device and the gas burner 11, as shown in FIG. 2, a gas shut-off valve 31 that is opened by the ignition operation of the button 21 and thereafter controlled to be opened and closed by the control device 4, In order to control the heating temperature, there is provided a flow rate control valve 32 whose flow rate is controlled by the control device 4.

  The control device 4 shown in FIG. 2 includes a microcomputer that controls the heating power of the gas burner 11. Based on the detected temperature measured by the temperature sensor 17, the control device 4 controls the automatic heating amount adjustment to increase or decrease the heating power of the gas burner 11 so that the detected temperature becomes a set temperature that is set by inputting with the temperature input unit 25. (Temperature control) is performed, or automatic control of the thermal power is performed so that cooking is performed in the cooking mode input by the operation units 23 and 24.

  The control device 4 includes a thermal power control unit 41 that controls the thermal power of the gas burner 11 by drivingly controlling the gas cutoff valve 31 and the flow rate control valve 32. The thermal power control unit 41 adjusts the thermal power of the gas burner 11 by adjusting the opening degree of the flow rate control valve 32 based on the temperature detected by the temperature sensor 17, or closes the gas cutoff valve 31 to extinguish the fire. To do. As described above, the gas cutoff valve 31 and the flow rate control valve 32 are driven and controlled automatically by the control device 4 so as to match the set temperature and the cooking mode input by the operation units 23 and 24. Is done.

  Further, the gas stove 1 is attached with a speaker 5 which is a notification means for performing a predetermined notification in response to a signal from the control device 4. This speaker 5 is controlled by the control by the speaker control unit 42 of the control device 4. For example, when automatic heating amount adjustment control (temperature control) is being performed, a change in heating power is notified in advance or heating is performed. When the temperature is set, it is notified that the temperature of the cooking container has reached the set temperature, or further, the temperature of the cooking container has become too high and is notified that the cooking container has become overheated. In the present embodiment, the speaker 5 is used as the notification unit. However, a light-emitting unit that performs notification using light such as an LED may be used. Moreover, when notifying using the speaker 5, you may make it alert | report that the preset temperature was reached | attained by a voice guide, or a thermal power change.

  Moreover, the gas stove 1 is provided with the timer 6 which measures cooking time, as shown in FIG. The timer 6 is activated by the ignition operation of the button 21. The timer 6 is used to measure an elapsed time from the start of the ignition operation in order to make a first determination described later, or to measure an elapsed time in the middle to make a second determination described later.

In the gas stove 1 of the present embodiment, the temperature sensor 17 directly measures the temperature of the bottom portion of the cooking container. Therefore, in cooking using oil such as tempura as an object to be cooked, the cooking stove is interposed. A response delay occurs in the heat transfer of the oil heat to the temperature sensor 17.
That is, after putting oil in a cooking container and igniting, heating is performed with a large heating power as the heating amount until the detected container temperature reaches the upper limit temperature, and then heating with a small heating power is performed. Depending on the difference in thermal conductivity, specific heat, and heat capacity depending on the material of the cooking container, the oil may be heated and the oil temperature may greatly exceed the upper limit temperature (overshoot).

  In particular, since the thermal conductivity varies depending on the material of the cooking container, the degree of overshoot also varies depending on the material of the cooking container. For example, in the case of a cooking container having a thermal conductivity and specific heat lower than that of an aluminum pan such as an iron pan, the oil temperature tends to overshoot when heated to the upper limit temperature with a large fire. In the case of a cooking container having a high thermal conductivity such as a pan, the temperature of the container quickly decreases due to heat radiation, so the tendency to overshoot is small.

  Moreover, as shown in the graph of FIG. 3, for example, when the set temperature for heating the oil is 180 ° C., heating starts in the iron cooking container (iron pan) and the aluminum cooking container (aluminum pan). The temperature difference between the cooking container and the oil during heating from is different. That is, in the case of an iron pan, since there is not much temperature difference between the iron pan and oil, temperature control can be performed while the set temperature is kept at 180 ° C. However, in the case of an aluminum pan, the actual oil temperature is considerably lower than the temperature of the aluminum pan. Therefore, by raising the set temperature, which is the temperature of the aluminum pan that is actually detected, to 200 ° C, The temperature can be controlled at around 180 ° C.

  Therefore, the gas stove 1 according to the present embodiment determines the material of the cooking container based on the temperature gradient at the initial stage of heating in order to adjust the temperature of the appropriate oil temperature according to the material of the cooking container. The 1st determination part 7 and the 2nd determination part 8 which determines the material of a cooking container again are provided.

The first determination unit 7 determines the material of the cooking container based on the temperature gradient at the initial stage of heating calculated from the measurement result of the temperature sensor 17 and the elapsed time by the timer 6.
When the temperature measured by the temperature sensor 17 and the temperature sensor 17 is within the set temperature range, the first determination unit 7 passes the time by the timer 6 when the temperature range for calculating the temperature gradient is set. A temperature gradient calculation unit 72 that calculates a temperature gradient based on the temperature, a first material determination unit 73 that determines the material of the cooking container based on the calculation result of the temperature gradient calculation unit 72, and a first determination memory 74 that records the determination result. With.

  As shown in FIG. 4, in the first determination unit 7, the temperature gradient obtained from the time Δt1 required for a predetermined temperature rise (for example, from 50 ° C. to 80 ° C.) differs depending on the material of the cooking container. In the 1 material determination part 73, when a temperature gradient is large, it determines with an aluminum pan, and when a temperature gradient is small, it determines with an iron pan or a stainless steel pan. In this embodiment, it is determined whether the pot is an aluminum pan or an iron pan.

  Further, in consideration of hot start of cooking, the temperature gradient calculation unit 72 does not calculate the temperature gradient and determines the first material when the temperature of the cooking container immediately after ignition of the gas burner 11 is already within the set temperature range. In part 73, it is judged that it is a material (iron) with low heat conductivity. A detailed method of determination will be described later.

  The 2nd determination part 8 is provided with the determination temperature setting part 81 for setting the determination temperature for determining the material of a cooking container. As shown in FIG. 4, the determination temperature set by the determination temperature setting unit 81 is first lower than the set temperature set by the operation unit 23 (for example, the first set temperature −15 ° C. set first). ). As will be described later, this determination temperature may be reset to the high temperature side according to the determination result of the second determination (for example, the reset second set temperature−15 ° C.).

  The second determination unit 8 includes a detection temperature comparison unit 82 that compares the detection temperature detected by the temperature sensor 17 with the determination temperature. The detected temperature comparison unit 82 issues a command to the thermal power control unit 41 to switch the thermal power from the large fire to the small fire when the detected temperature reaches the determination temperature. In addition, when temperature control is entered, when the temperature control OFF temperature is detected, the thermal power is switched from large fire to small fire, and when the temperature control ON temperature is detected during small fire, the thermal power is switched from small fire to large fire. The thermal power control unit 41 is instructed to switch to

  Furthermore, the second determination unit 8 measures the time from the time when the determination temperature is reached and compares an elapsed time comparison unit 83 that compares whether or not a predetermined time (for example, 20 seconds after the determination temperature has been reached) has elapsed. Prepare.

  Moreover, the 2nd determination part 8 determines the determination reference value which determines the determination reference value (A) for determining the material of a cooking container from the degree of the temperature change within predetermined time (within 20 seconds) from the time of determination temperature arrival. Part 84 is provided. In this embodiment, the determination reference value (A) is a threshold value for determining whether it is an iron pan or an aluminum pan.

Judgment reference value (A) is determined by experiment in advance until a predetermined time elapses after the iron pan and the aluminum pan reach the judgment temperature set at a temperature lower than the initial setting temperature and are switched from the large fire to the small fire. Temperature change data is taken, and based on the result, a determination reference value (A) is set for each material of the cooking container.
Specifically, as shown in FIG. 6, the temperature at that time and the temperature 10 seconds before for 10 seconds every second after a lapse of a predetermined time (for example, 10 seconds) from the time when the fire broke down to a small fire. The temperature difference ΔT2 is calculated, and the temperature difference ΔT2 data is obtained for each material and set temperature of the cooking container, and the temperature change data for 10 seconds is obtained from the time when the fire has changed to the small fire. And from the result of data, in order to determine the material of a cooking container, a preferable temperature difference is set as a determination reference value (A).

  Since it is found from experimental data that the temperature difference ΔT2 is different between a case where the temperature at the peak of the temperature curve is high and a case where the temperature is low at a predetermined set temperature. When the temperature difference at the time when a predetermined time (for example, 10 seconds) has elapsed from the time when the small fire is changed to a small fire, the temperature and the set temperature for each cooking container are large (5 ° C or higher) and small (less than 5 ° C). The judgment reference value (A) is different every time. Further, the determination reference value (A) used in the first determination and the second determination in the second determination is also different for each material and set temperature of the cooking container. Note that the determination reference value (A) used in the first determination and the second determination in the second determination may be the same.

  In the present embodiment, the determination reference value (A) corresponding to the iron pan is set to be lower than the determination reference value (A) corresponding to the aluminum pan. For example, when the set temperature is 130 ° C., the criterion value (A) corresponding to the iron pan is −4 ° C., and the criterion value (A) corresponding to the aluminum pan is −1 ° C. Further, the lower the set temperature, the lower the determination reference value (A). Furthermore, the determination reference value (A) used in the second determination of the second determination is set lower than the determination reference value (A) used in the first determination.

  Then, the determination reference value determination unit 84 receives the determination result of the material of the cooking container determined by the first determination unit 7 from the first determination memory 74 of the first determination unit 7 and stores the determination result for each material recorded in advance. From the determination reference value (A), a determination reference value (A) that matches the determination result in the first determination unit 7 is determined according to the set temperature and the number of determinations.

Furthermore, the 2nd determination part 8 is provided with the 2nd material determination part 85 which determines the material of a cooking container again.
The second material determination unit 85 changes the thermal power from large fire to small fire based on the comparison result by the detected temperature comparison unit 82 and the elapsed time comparison unit 83 and the determination reference value (A) determined by the determination reference value determination unit 84. The degree of temperature change measured within a predetermined time from the time of switching is determined based on the determination reference value (A) which is a threshold, that is, the determination reference value (A) corresponding to the material of the cooking container determined by the first determination unit 7. ) And again determine the material of the cooking container.

  As shown in FIGS. 6 and 7, the second material determination unit 85 determines the temperature difference ΔT2 between the temperature at the current detection time and the detection temperature 10 seconds before the determination reference value (A) and every second. Compare. Specifically, a temperature difference ΔT2 is calculated every second after a predetermined time (for example, 10 seconds) has elapsed from a large fire to a small fire, and a predetermined time (10 seconds) before, and the calculated temperature difference ΔT2 is calculated. And the judgment reference value (A) are compared every second. Then, as shown in FIG. 7, when the calculated temperature difference ΔT2 becomes equal to or less than the determination reference value (A) within the set comparison time (for example, within 20 seconds after switching from large fire to small fire), At that time, it is determined that the aluminum pan is made of a material having a high thermal conductivity. As shown in FIG. 6, if the comparison time is not exceeded and the judgment reference value (A) is not reached, the material having a low thermal conductivity is used. Judged as an iron pan.

Moreover, the 2nd determination part 8 raises preset temperature to predetermined temperature (for example, 10 degreeC), when the determination result of the 2nd material determination part 85 is an aluminum pan (cooking container with a material with large heat conductivity). A change temperature setting unit 86 for resetting is provided.
As shown in FIGS. 4 and 5, the change temperature setting unit 86 raises the set temperature by a predetermined temperature based on the determination result from the second material determination unit 85 to increase the second set temperature (for example, the first first set temperature). + 10 ° C.) is reset, and the second set temperature is output to the determination temperature setting unit 81.
Furthermore, when the determination result of the second material determination unit 85 determines that the second material determination unit 85 is an aluminum pan, the change temperature setting unit 86 issues a command to the thermal power control unit 41 to switch the thermal power from small fire to large fire.

When the second set temperature is input from the changed temperature setting unit 86, the determination temperature setting unit 81 sets a temperature lower than the second set temperature (for example, the second set temperature−15 ° C.) as the redetermination temperature. To do.
In addition, the detected temperature comparison unit 82 outputs the thermal power to the thermal power control unit 41 so as to switch the thermal power from the large fire to the small fire when the detected temperature reaches the redetermination temperature.

The second material determination unit 85 determines the degree of temperature change measured within a predetermined time from the time when the detected temperature reaches the redetermination temperature and switches the heating power, and the first determination unit 7 determines the degree of temperature change as the second determination. The material of the cooking container is determined again in comparison with the determination reference value (A) corresponding to the material of the container.
When the second material determination unit 85 determines again that the aluminum pan is based on the redetermination temperature, the changed temperature setting unit 86 sets the second setting based on the determination result from the second material determination unit 85. The temperature is raised by a predetermined temperature and the third set temperature (second set temperature + 10 ° C.) is reset, and a command is issued to the thermal power control unit 41 to switch the thermal power from a small fire to a large fire.
In this case, the control device 4 performs control so as to start automatic heating amount adjustment control based on the third set temperature.

  Furthermore, if the set temperature remains at the first set temperature set by the operation unit 23, the detected temperature comparison unit 82 of the control device 4 compares the detected temperature with the first set temperature and changes the temperature setting unit 86. If the set temperature has been changed in step (1), the detected temperature is compared with the reset set temperature.

Then, as shown in FIGS. 4 and 8, the iron pan that is not finally determined to be a material having a high thermal conductivity is detected by the temperature sensor 17 when the set temperature set at the time of the determination is detected by the temperature sensor 17. 5 issues a command to the speaker control unit 42 so as to notify the arrival of the set temperature.
On the other hand, when it is finally determined that the aluminum pan is made of a material having a high thermal conductivity, the detected temperature comparison unit 82 uses the third set temperature set at the time of determination as shown in FIG. The speaker 5 is notified of the arrival of the set temperature after a predetermined time has elapsed since the detection at 17 (for example, 2 minutes), or when a predetermined condition is satisfied (for example, after detecting temperature control OFF twice). Commands are given to the speaker control unit 42.

  Thus, when the cooking container is determined to be an aluminum pan, the difference between the temperature of the cooking container and the temperature of the oil in the container is large, so that the temperature of the cooking container is reset to the third set temperature. Even if it reaches, the temperature of the oil has not reached the first set temperature. For this reason, notification is made assuming that the temperature of the oil has reached the first set temperature after a predetermined time has elapsed since the detected temperature reached the third set temperature, or when a predetermined condition is satisfied.

In the second determination unit 8, the determination reference value determination unit 84 sets the second determination determination reference value (A) so that the temperature difference after a lapse of a predetermined time (for example, 10 seconds) after the small fire is set. It is set separately for a case where the temperature difference is larger than a predetermined temperature difference (for example, 5 ° C.) and a case where it is smaller.
In this case, the criterion value (A) is set lower when the temperature difference after the lapse of the predetermined time (after 10 seconds) is smaller than when the temperature difference is larger than the predetermined temperature difference (5 ° C.). Such control further increases the reliability of the determination.

  Next, regarding the determination of the material of the cooking container and the temperature control of the oil temperature when the cooking container is heated by the automatic heating amount adjustment control (temperature control) that maintains the oil temperature at the set temperature in the gas stove 1 of the present embodiment. This will be described with reference to the flowcharts of FIGS.

As shown in the flowchart of FIG. 10, when the gas burner 11 is ignited (step S11) and the controller 4 is turned on (step S12), the first determination for determining the type of the cooking container is started. The
The gas burner 11 starts heating the cooking container with a large heating power and measures the temperature of the cooking container at the time of ignition (step S13). When the detected temperature [TH temperature] at the time of ignition is 50 ° C. or higher (Yes in step S13), it is determined that the cooking container is already in a hot state in a heated state, and the material of the cooking container is iron for the time being. (Step S14). By determining the iron, the setting temperature, which will be described later, is not reset, so that the cooking container can be prevented from overheating.

  Even after it is determined to be iron at the time of ignition, if the user operates the heating power of the gas burner to change from a large fire to a small fire, the temperature of the cooking container decreases. Therefore, when the heating power is returned to a large fire, the temperature of the cooking container rises, so the temperature gradient from when the detected temperature reaches 50 ° C again until it reaches 80 ° C is calculated to determine the material of the cooking container. In order to start over, it is determined whether or not the detected temperature has dropped below 50 ° C. (step S15). If the detected temperature falls below 50 ° C., the determination is made again because the detected temperature at the time of ignition is not 50 ° C. or higher (No in step S13). If the hot start is performed by the aluminum pan, the determination result of the aluminum pan may be obtained by performing this determination again.

  If the detected temperature at the time of ignition is not 50 ° C. or higher (No in step S13), it is determined whether the detected temperature has reached 50 ° C. (step S16). If the detected temperature has reached 50 ° C. (Yes in step S16), 50 ° C. It is determined whether or not a predetermined time (for example, 40 seconds) has elapsed since the arrival (step S17).

  If the predetermined time has not elapsed since reaching 50 ° C. (No in step S17), it is determined whether the detected temperature has reached 80 ° C. (step S18). If the detected temperature reaches 80 ° C. without elapse of a predetermined time after reaching 50 ° C. (Yes in step S18), the temperature gradient is large as shown in FIG. Determination is made (step S19).

  Even when it is determined to be aluminum in step S19, the temperature of the cooking container decreases if the user operates the heating power of the gas burner to change from a large fire to a small fire. Therefore, when the heating power is returned to a large fire, the temperature of the cooking container rises, so the temperature gradient from when the detected temperature reaches 50 ° C again until it reaches 80 ° C is calculated to determine the material of the cooking container. In order to start over, it is determined whether or not the detected temperature falls below 50 ° C. (step S20). If the detected temperature falls below 50 ° C., the determination is made again because the detected temperature at the time of ignition is not 50 ° C. or higher (No in step S13).

If the detected temperature does not reach 80 ° C. (No in step S18) and a predetermined time has elapsed after reaching 50 ° C. (Yes in step S17), as shown in FIG. Since it is small, it determines with the material of a cooking container being iron (step S14).
The result of the material determination of the cooking container by the first determination unit 7 is recorded in the first determination memory 74.
In addition, when the detected temperature [TH temperature] at the time of ignition is 50 ° C. or more, the result determined in the previous first determination can be taken over.

  When the 1st determination which determines the material of a cooking container is complete | finished, the 2nd determination which is a re-determination of the material of a cooking container is performed next. As shown in the flowchart of FIG. 11, it is determined whether the temperature adjustment function mode is being executed (step S21). If the temperature adjustment function mode is being executed (Yes in step S21), automatic heating amount adjustment is performed. Control (temperature control) is executed, and the first determination of the second determination for determining the type of the cooking container is started. In the present embodiment, the first set temperature input from the operation unit 23 is 130 ° C.

First, in order to determine whether the cooking container is heated to some extent, it is determined whether or not the detected temperature is equal to or higher than a temperature (105 ° C.) that is 25 ° C. lower than the first set temperature (step S22).
If the detected temperature is 105 ° C. or higher (Yes in step S22), it can be determined that the engine has been hot-started at the time of ignition and has maintained a high temperature state without decreasing the temperature from the time of ignition. In step S23, it is determined that the material of the cooking container is iron (step S24).

  If the detected temperature reaches the first set temperature (130 ° C.) (Yes in step S25), it is detected that the first set temperature has been reached (step S26), and the first set temperature has been reached. Is notified by the speaker 5 (step S27). When the notification is made, the process proceeds to automatic temperature control shown in the flowchart of FIG. The automatic temperature control of the iron pan will be described later.

  In step S22, when the detected temperature is not 105 ° C. or higher (No in step S22), the heating power is set to a large fire (step S28), and the detected temperature is the determination temperature (first set temperature−15 ° C. = 115 ° C.). Is reached (Yes in step S29), the heating power is changed from a large fire to a small fire (step S30).

  When the thermal power becomes small, various temperature changes as shown in FIG. 5 may occur. First, it is determined whether or not a predetermined time (for example, 20 seconds) has elapsed since the determination temperature was reached (step S31). ).

  If the predetermined time has not elapsed since reaching the determination temperature (No in step S31), it is determined whether the detected temperature has reached the first set temperature (130 ° C.) (step S32). If the detected temperature reaches the first set temperature before the predetermined time has elapsed (Yes in step S32), it is determined that the material of the cooking container is iron (step S24). In this case, the temperature curve shown in the detection / notification 1-1 of FIG. 5 is drawn, and when the detected temperature reaches the first set temperature (Yes in step S25), as soon as the arrival is detected (step S26), the speaker 5 (Step S27), the process proceeds to automatic temperature control shown in the flowchart of FIG.

  In step S32, if the first set temperature has not been reached (No in step S32), the temperature difference ΔT2 between the temperature at the current detection time and the detected temperature 10 seconds before is determined as a criterion value (A). And every second (step S33). As the determination reference value (A), the determination reference value (A) of the first set temperature corresponding to the material of the cooking container determined by the first determination unit 7 is used.

The temperature difference ΔT2 is larger than the determination reference value (A) (No in step S33), the detected temperature is 2 ° C lower than the determination temperature (115 ° C) (113 ° C) or higher (No in step S34), and the determination temperature has been reached. When a predetermined time (for example, 20 seconds) has elapsed from the time (Yes in step S31), the heating power is switched to a large fire (step S35), and it is determined that the material of the cooking container is iron (step S24).
In this case, the temperature curve shown in the detection / notification 1-2 of FIG. 5 is drawn, and when the detected temperature reaches the first set temperature (Yes in step S25), the arrival of the first set temperature is detected immediately (step S26). ) Is notified by the speaker 5 (step S27), and the process proceeds to the automatic temperature control shown in the flowchart of FIG.

  Further, when the temperature difference ΔT2 is equal to or smaller than the determination reference value (A) (Yes in Step S33), or even if the temperature difference ΔT2 is larger than the determination reference value (A) (No in Step S33), the detected temperature is When the temperature is lower than the determination temperature (115 ° C.) by 2 ° C. (113 ° C.) (Yes in Step S34), it is determined that the material of the cooking container is aluminum (Step S36).

  When it is determined as an aluminum pan, the process proceeds to the second determination of the second determination, the setting temperature is reset to the second setting temperature (140 ° C.) that is 10 ° C. higher than the first setting temperature (130 ° C.), and the determination The temperature is reset to a temperature (125 ° C.) that is 15 ° C. lower than the second set temperature (step S37), and the heating power is switched to a large fire (step S38).

When the heating power becomes a large fire, it is determined whether the detected temperature is equal to or higher than the reset determination temperature (125 ° C.) (step S39).
When the detected temperature has reached the second set temperature (140 ° C.) (Yes in step S40) when the detected temperature is equal to or higher than the determination temperature (125 ° C.) reset (Yes in step S39), the second It is detected that the set temperature has been reached (step S41), and the second set temperature has been notified by the speaker 5 (step S42). When notified, the process proceeds to automatic temperature control at the second set temperature (140 ° C.). In this case, the temperature curve shown in the detection / notification 1-3 of FIG. 5 is drawn, and the second determination of the second determination is not performed.

  In the present embodiment, the heating power is switched from a small fire to a large fire after a predetermined time (20 seconds) has elapsed since the determination temperature (115 ° C.) at the first determination in the second determination has been reached. In the second determination, the minimum long fire time (X) (the minimum heating time of the present invention) is set after the elapse of 20 seconds.

  In step S39, when the detected temperature is lower than the determination temperature (125 ° C.) (No in step S39), when the detected temperature reaches the reset determination temperature (125 ° C.) as shown in the flowchart of FIG. (Yes in step S43), it is determined whether or not the minimum large fire time (X) has already elapsed when the determination temperature is reached (step S44).

  When the determination temperature has reached the minimum large fire time (X) (No in step S44), the heating power is maintained at a large fire, and when the detected temperature reaches the second set temperature (140 ° C.) (step S45). Yes), it is detected that the second set temperature has been reached (step S46), and the speaker 5 is notified that the second set temperature has been reached (step S47). When notified, the process proceeds to automatic temperature control at the second set temperature (140 ° C.). In this case, the temperature curve shown in the detection / notification 1-4 of FIG. 5 is drawn, and the second determination of the second determination is not performed.

  In step S44, when the minimum large fire time (X) has elapsed when the detected temperature reaches the determination temperature (125 ° C.) (Yes in step S44), the heating power is switched from large fire to small fire ( Step S48), the second determination of the second determination is performed.

When the thermal power becomes a small fire, it is determined whether or not a predetermined time (for example, 20 seconds) has elapsed since reaching the redetermination temperature (125 ° C.) (step S49).
If the predetermined time has not elapsed since reaching the redetermination temperature (No in step S49), it is determined whether the detected temperature has reached the second set temperature (140 ° C.) (step S50). If the detected temperature reaches the second set temperature before the predetermined time has elapsed (Yes in step S50), immediately after the arrival is detected (step S55), the speaker 5 notifies the user (step S56), the second Moves to automatic temperature control at the set temperature (140 ° C). In this case, the temperature curve shown in Detection / Notification 2-1 in FIG. 5 is drawn.

  In step S50, if the second set temperature has not been reached (No in step S50), the temperature difference ΔT2 between the temperature at the current detection time and the detection temperature 10 seconds before is determined as a criterion value (A). And every second (step S51). As the determination reference value (A), the determination reference value (A) for the second determination corresponding to the material of the cooking container determined by the first determination unit 7 is used.

The temperature difference ΔT2 is larger than the determination reference value (A) (No in step S51), and the detected temperature is 2 ° C. lower than the redetermination temperature (125 ° C.) (123 ° C.) or more (No in step S52). If a predetermined time (for example, 20 seconds) has elapsed since the temperature was reached (Yes in step S49), the heating power is switched to a large fire (step S53).
Then, when the detected temperature reaches the second set temperature (140 ° C.) (Yes in step S54), immediately after the arrival of the second set temperature is detected (step S55), it is notified by the speaker 5 (step S56). Moves to automatic temperature control at the set temperature (140 ° C). In this case, the temperature curve shown in Detection / Notification 2-2 of FIG. 5 is drawn.

  Further, when the temperature difference ΔT2 is equal to or smaller than the determination reference value (A) (Yes in step S51), or even if the temperature difference ΔT2 is larger than the determination reference value (A) (No in step S51), the detected temperature is When the temperature is lower than the re-determination temperature (125 ° C.) by 2 ° C. (123 ° C.) (Yes in Step S52), it is determined that the material of the cooking container is aluminum again (Step S57).

If it is determined as an aluminum pan, the set temperature is reset to a third set temperature (150 ° C.) that is 10 ° C. higher than the second set temperature (140 ° C.) (step S58), and the heating power is switched to a large fire (step S58). S59).
When the thermal power becomes large fire and the detected temperature reaches the third set temperature (150 ° C.) (Yes in step S60), it is detected that the third set temperature has been reached (step S61). At this time, it is not immediately notified that the third set temperature has been reached.

When it is determined as an aluminum pan and it is detected that the detected temperature has reached the third set temperature (150 ° C.), automatic temperature control of the aluminum pan as shown in FIG. 8 is started.
First, the heating power is switched from a large fire to a small fire (step S101). The small fire duration is set in advance and is 1 minute in this embodiment. In this embodiment, the temperature adjustment OFF temperature at the time of performing the automatic temperature adjustment control of the aluminum pan is set to 159 ° C., and the temperature adjustment ON temperature is set to 155 ° C.

  Then, it is determined whether or not the detected temperature is lower than a temperature (147 ° C.) that is 3 ° C. lower than the third set temperature (step S102). If the detected temperature is 147 ° C. or higher (No in step S102), It is determined whether it is within the small fire duration (step S103).

  If the detected temperature is lower than 147 ° C. within the small fire duration (No in Step S103) (Yes in Step S102), the temperature curve (1) in FIG. 8 is reached, and the thermal power is switched to a large fire. (Step S105).

  Even if the small fire duration has elapsed (Yes in step S103), the detected temperature is 147 ° C. or higher (No in step S102), and when the small fire duration has elapsed, the detected temperature is turned off. When the temperature is 159 ° C. or lower (Yes in step S104), the temperature curve (2) in FIG. 8 is reached, and the heating power is switched to a large fire (step S105).

  Furthermore, even if the small fire duration has elapsed (Yes in step S103), the detected temperature is 147 ° C. or higher (No in step S102), and when the small fire duration has elapsed, the detected temperature is OFF. When the temperature is higher than the temperature (159 ° C.) (No in step S104), the thermal power is maintained with a small fire until the temperature curve (3) in FIG. 8 is reached and the temperature control ON temperature (155 ° C.) is reached.

  In the state of the temperature curves (1) and (2) in FIG. 8, if the heating power becomes a large fire in step S105, the large fire is maintained until the detected temperature reaches the temperature control OFF temperature (159 ° C.).

In the state of the temperature curve (1) in FIG. 8, when the detected temperature reaches the temperature adjustment OFF temperature (159 ° C.) (Yes in step S106), the mode is switched to the small fire. Is counted (first time) (step S107), and the large fire is switched to the small fire (step S108).
Next, when the detected temperature reaches the temperature control ON temperature (155 ° C.) (Yes in Step S109), the heating power is switched to a large fire (Step S110).

Then, when the detected temperature reaches the temperature control OFF temperature (159 ° C.) again (Yes in step S111), it switches to small fire, but counts the number of times of switching to small fire (second time) (step S112). . Based on the count at this time, it is determined whether the total number of small fires has become two (step S113).
If the small fire count is 2 (Yes in step S113), a notification that the oil temperature has reached the third set temperature is given (step S114), the thermal power is switched to the small fire, and the temperature control is performed as it is. continue.

Further, in the case of the temperature curve (2) in FIG. 8, when the detected temperature reaches the temperature adjustment OFF temperature (159 ° C.) (Yes in step S106), the mode is switched to a small fire. Is counted (first time) (step S107), and the large fire is switched to the small fire (step S108).
Next, when the detected temperature reaches the temperature control ON temperature (155 ° C.) (Yes in Step S109), the heating power is switched to a large fire (Step S110).

  Then, before the detected temperature reaches the temperature adjustment OFF temperature (159 ° C.) (No in step S111), a predetermined time (for example, 2 minutes) has elapsed since the third set temperature (150 ° C.) was detected. If (Yes in step S115), a notification that the temperature of the oil has reached the third set temperature is given (step S116), and the heating power is set to a large fire until the detected temperature reaches the temperature control OFF temperature (159 ° C). Maintain the temperature control as it is.

  In the case of the temperature curve (3) in FIG. 8, the heating power is maintained at a small fire until the temperature adjustment ON temperature (155 ° C.) is reached, and in step S109, the detected temperature is changed to the temperature adjustment ON temperature (155 ° C.). If the predetermined time (for example, 2 minutes) has elapsed since the third preset temperature (150 ° C.) was detected (NO in step S109) before reaching (NO in step S109), the oil temperature is 3. Notification that the set temperature has been reached is performed (step S118), and the thermal control is continued as it is while maintaining the heating power at a small fire until the detected temperature reaches the temperature control ON temperature (155 ° C.).

  8 is a modification of the state of the temperature curve (3) in FIG. 8, and the process proceeds from step S104 to step S109, and a predetermined time (for example, 2 minutes) elapses after the third set temperature (150 ° C.) is detected. Until it reaches the temperature control ON temperature (155 ° C.) (Yes in step S109), the small fire is switched to the large fire (step S110), and the detected temperature is OFF. When the temperature (159 ° C.) is reached (Yes in step S111), the temperature is switched to a small fire. In this case, the number of times of switching to a small fire is counted (first time) (step S112). Based on the count at this time, it is determined whether the total number of small fires has become two (step S113). Since the small fire count is still 1 (No in step S113), the heating power is switched from a large fire to a small fire (step S119), and the process returns to step S109.

Thus, in the case of an aluminum pan, when automatic temperature control is entered, when the temperature of the aluminum pan actually reaches the third set temperature (150 ° C.) and the temperature control OFF temperature is detected twice, Alternatively, when a predetermined time (for example, 2 minutes) has elapsed since the third set temperature (150 ° C.) has been detected, a notification that the oil temperature has reached the first set temperature is performed. By shifting the notification timing in this way, the oil temperature in the aluminum pan is as close as possible to the first set temperature (130 ° C), and the oil temperature is set to the first set temperature (130 ° C) to the user. It can be notified that it has arrived.
Also, when the set temperature is raised twice and set to the third set temperature in the judgment of the aluminum pan, the temperature adjustment is turned on after a certain time (for example, 5 minutes) has elapsed since the third set temperature was detected. The OFF temperature may be reset again. For example, the temperature is changed to lower by 10 ° C.

Further, in the second determination, when it is determined that the material of the cooking container is iron, automatic temperature control as shown in the flowchart of FIG. 14 and FIG. 9 is performed.
First, the heating power is switched from a large fire to a small fire (step S201). The small fire duration is set in advance, and even in the case of an iron pan, this embodiment is 1 minute. In this embodiment, the temperature adjustment OFF temperature when performing automatic temperature adjustment control of the iron pan is set to 139 ° C., and the temperature adjustment ON temperature is set to 135 ° C.

  Then, it is determined whether or not the detected temperature is lower than a temperature (127 ° C.) that is 3 ° C. lower than the first set temperature (130 ° C.) (step S202), and when the detected temperature is 127 ° C. or higher (step S202). No), it is determined whether it is within the small fire duration (step S203).

  If the detected temperature becomes lower than 127 ° C. within the small fire duration (No in Step S203) (Yes in Step S202), the temperature curve (1) in FIG. 9 is reached, and the thermal power is switched to a large fire. (Step S205).

  Even if the small fire duration has elapsed (Yes in step S203), the detected temperature is 127 ° C. or higher (No in step S202), and when the small fire duration has elapsed, the detected temperature is turned off. When the temperature is equal to or lower than 139 ° C. (Yes in step S204), the temperature curve (2) in FIG. 9 is reached, and the heating power is switched to a large fire (step S205).

  Furthermore, even if the small fire duration has elapsed (Yes in step S203), the detected temperature is 127 ° C. or higher (No in step S202), and when the small fire duration has elapsed, the detected temperature is OFF. When the temperature is higher than 139 ° C. (No in step S204), the thermal power is maintained with a small fire until the temperature curve (3) in FIG. 9 is reached and the temperature control ON temperature (135 ° C.) is reached.

In the state of the temperature curves (1) and (2) in FIG. 9, when the heating power becomes a large fire in step S205, the large fire is maintained until the detected temperature reaches the temperature control OFF temperature (139 ° C.).
In the case of the temperature curves (1) and (2) in FIG. 9, when the detected temperature reaches the temperature adjustment OFF temperature (139 ° C.) (Yes in step S206), the thermal power is switched from the large fire to the small fire. (Step S207).

Next, when the detected temperature reaches the temperature control ON temperature (135 ° C.) (Yes in step S208), the heating power is switched to a large fire (step S209).
When the detected temperature reaches the temperature control OFF temperature (139 ° C.) again (Yes in step S210), the thermal power is switched from a large fire to a small fire (step S211), and the process returns to step S208 to continue the temperature control. .

  In the case of the temperature curve (3) in FIG. 9, the heating power is maintained at a small fire until the temperature adjustment ON temperature (135 ° C.), and the detected temperature reaches the temperature adjustment ON temperature (135 ° C.). (Yes in step S208), temperature control after step S209 is continued.

In addition, in a cooking device that performs temperature control, to prevent ignition to the cuffs when the thermal power switches from small fire to large fire during temperature control, the thermal power is switched to large fire before the thermal power switches from small fire to large fire. There has been proposed a cooking device that informs the user of this.
Therefore, when such a heating power switching notification control is incorporated into the heating cooking apparatus of the above embodiment, the notification for notifying that the set temperature has been reached by the second determination and the notification for the heating power switching are confused, and the set temperature has been reached. It is difficult to determine whether it is a firepower change.

Therefore, when the temperature control is performed after the second determination, by controlling the thermal power as shown in FIG. 15 or FIG. 16, the notification at the time of switching the thermal power is reduced, and the set temperature is surely recognized. be able to.
For example, as shown in FIG. 15, when the second determination is entered, the heating power is switched from a large fire to a small fire, and then the detected temperature reaches the third set temperature and is notified with a delay that the third set temperature has been reached. In the meantime, when increasing the thermal power, the medium fire is less likely to ignite the cuffs compared to the large fire, and even after a delay, the small fire is set when the temperature control is OFF, and the medium fire when the temperature control is ON. By performing the temperature control as described above, it is possible to eliminate the notification of the heating power switching and reliably recognize the arrival of the set temperature.

  Also, as shown in FIG. 16, when the second determination is entered, the heating power is switched from a large fire to a small fire, and then the detected temperature reaches the third set temperature, and a notification that the third set temperature has been reached is delayed. In the meantime, when increasing the thermal power, the medium fire is less likely to ignite the cuffs compared to the large fire, and after the delay, the small fire is set when the temperature control is OFF, and the large fire is set when the temperature control is ON. Even if the temperature control is performed to notify that the third set temperature has been reached after a delay, a notification that the set temperature has been reached can be reliably recognized.

The cooking device according to the present invention is not limited to the above embodiment, and various design changes can be made.
Moreover, in the said embodiment, although the aluminum pan was mentioned as a cooking container with a material with large heat conductivity, and the iron pan was mentioned as a cooking container with a material with small heat conductivity, it is not restricted to these materials. Furthermore, although the gas burner is used as the heating means in the above embodiment, an electric heater or an electromagnetic cooker can also be used.

1 Gas stove 4 Control device (control means)
5 Speaker (notification means)
6 Timer 7 First determination unit 8 Second determination unit 11 Gas burner (heating means)
17 Temperature sensor (temperature measuring means)
23 Operation unit 25 Temperature input unit

Claims (7)

Heating means for heating the cooking vessel;
Temperature measuring means for measuring the temperature of the cooking container;
Temperature input means for setting the heating temperature;
Control means for performing automatic heating amount adjustment control for increasing or decreasing the heating amount of the heating means so that the detected temperature becomes a set temperature set by the temperature input means based on the detected temperature measured by the temperature measuring means;
A cooking device comprising:
A first determination unit that determines a material of the cooking container based on a temperature gradient at an initial stage of heating calculated from a measurement result of the temperature measurement unit;
The temperature measured by the temperature measuring means within a predetermined time from when the heating amount is switched to become smaller when the judgment temperature set at a temperature lower than the preset temperature is reached And a second determination unit that re-determines the material of the cooking container by comparing the degree of change with a determination reference value set in advance according to the material of the cooking container determined by the first determination unit. Cooking equipment. The cooking device according to claim 1,
The second determination unit
Set a judgment temperature lower than the set temperature, switch the heating amount to be small when the judgment temperature is reached, and change the temperature measured by the temperature measuring means within a predetermined time from the point of switching to a small heating amount. The degree is compared with the determination reference value, the material of the cooking container is determined again, and when it is determined that the cooking container is made of a material having high thermal conductivity, the determination is performed again by raising the set temperature by a predetermined temperature. A cooking device configured to be performed at least once. The cooking device according to claim 2,
The second determination unit
In the first re-determination, if it is determined that the cooking container is made of a material having a high thermal conductivity and the second set temperature is reset, and a temperature lower than the second set temperature is set as the re-determination temperature, the heating is small. The heating amount is switched from a larger heating amount to a larger heating amount, and when the redetermination temperature is reached after the minimum heating time has elapsed since the switching of the heating amount, the heating amount is switched from a larger heating amount to a smaller heating amount to reduce the heating amount. Cooking by comparing the degree of temperature change measured by the temperature measuring means within a predetermined time from the time of switching with a determination reference value for redetermination set in advance according to the material of the cooking container determined by the first determination unit A cooking device configured to re-determine the material of the container. In the heating cooking apparatus of any one of Claims 1-3,
When the second determination unit determines that the cooking container is made of a material having a high thermal conductivity, the set temperature is increased by a predetermined temperature and reset.
A cooking device configured to start automatic heating amount adjustment control based on the preset temperature. In the cooking device according to any one of claims 1 to 4,
The comparison between the determination reference value of the second determination and the degree of temperature change based on the detected temperature was calculated by calculating a temperature difference from a predetermined time every fixed time after switching to a small heating amount and elapse of a predetermined time. The temperature difference is compared with the criterion value at regular intervals, and if the temperature difference falls below the criterion value within the set comparison time, it is determined that the cooking container is made of a material with high thermal conductivity at that time. A cooking device configured to do. In the cooking device according to any one of claims 1 to 5,
The setting of the determination reference value of the second determination is divided into a case where the temperature difference after the elapse of a predetermined time after becoming a small heating amount is larger than the predetermined temperature difference and a case where the temperature difference is small.
A cooking apparatus configured to set the determination reference value lower in the case of being smaller than in the case of being larger. The heating cooking apparatus according to any one of claims 1 to 6,
Provided with an informing means for informing the set temperature arrival,
A cooking container that is not finally determined to be a cooking container having a high thermal conductivity by the second determination unit is set by the notification means when the set temperature set at the time of the determination is detected by the temperature measuring means. While alerting you to temperature,
The cooking container finally determined to be a cooking container made of a material having a high thermal conductivity in the second determination unit is after a predetermined time has elapsed since the set temperature set at the time of determination is detected by the temperature measuring means, or A heating cooking apparatus configured to perform control so as to notify the arrival of the set temperature from the notification means when a predetermined condition is satisfied.

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