JP2012049059A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker that changes a heating power in an automatic cooking course to a heating power appropriate for a cooking amount of rice in a stage earlier than conventional cooking amount determination performed by using load detection means.SOLUTION: The heating cooker comprises cooking amount determination means 8 determining a cooking amount during heating based on a time period until detecting a change of a temperature gradient in a pot into negative. Accordingly, the heating cooker can change a heating power to a heating power appropriate for a cooking amount of rice in a stage earlier than conventional technique thereby enabling cooking of more delicious looking rice regardless of a cooking amount.

Description

  The present invention relates to induction heating cooking equipment.

  Conventionally, when this type of induction heating cooker automatically cooks rice, it has been necessary to select and input the amount of cooked rice in advance (see, for example, Patent Document 1). Further, in another prior art, as a means for determining the load amount of the heated object, there is one that calculates the time required for a certain temperature rise from a certain temperature, or calculates and determines the integrated value of the heating output during that time. (For example, see Patent Document 2).

JP 2005-310384 A JP-A-5-21149

  However, in the conventional configuration, it is necessary to provide a selection means for inputting the amount of rice cooking, and it is necessary to enter the amount of rice cooking. Moreover, when applying another conventional load amount determination means to an automatic rice cooking course and performing rice cooking, the rice cooking amount (rice amount + water amount) is determined, and heating control according to the rice cooking amount is executed. There was a problem of requiring a certain amount of time.

  The present invention solves the above-mentioned conventional problems, can be changed to an appropriate heating output according to the total number of rice cooked at an earlier stage than before, and more delicious workmanship regardless of the number of cooked rice total An object of the present invention is to provide an induction heating cooker that can cook rice.

  In order to solve the conventional problems, an induction heating cooker according to the present invention includes a top plate on which a pan is placed, a heating coil that is provided below the top plate and that induction-heats the pan, and the heating coil. Inverter for supplying a high frequency current to the inverter, control means for controlling the output of the inverter, temperature detection means for detecting the temperature of the pan bottom of the pan, and an automatic cooking course including rice cooking Total number determination for determining the total number of cooked rice in the pan based on the course selection means for selecting one automatic cooking course from the above, the timing means for timing time, the signals of the temperature detection means and the timing means When the control means detects that the temperature gradient of the temperature detected by the temperature detection means has changed to negative while the control means is heating at a predetermined heating power, Based on the time measurement result of the means, it is determined that the total number of cooked rices increases as the time from the start of heating until it is detected that the temperature gradient of the temperature has changed to negative, and the control means determines the total number determination means The heating output is changed according to the total number determined in (1).

  By this, by judging the number of rice cooking from the time until it is detected that the temperature gradient of the temperature in the pan has changed to negative, it is changed to an appropriate heating output according to the number of rice cooking at an earlier stage than before. You can cook more deliciously prepared rice regardless of the number of rice cooked.

The induction heating cooker of the present invention can be changed to an appropriate heating output according to the number of cooked rice at an earlier stage than before, and can cook more delicious workmanship rice regardless of the number of cooked rice. Can do.

The schematic block diagram of the induction heating cooking appliance in Embodiment 1, 2 of this invention Rice cooking process diagram of induction heating cooker in Embodiments 1 and 2 of the present invention The figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in Embodiment 1 of this invention. The figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in Embodiment 2 of this invention. The schematic block diagram of the induction heating cooking appliance in Embodiment 4,5,6 of this invention The figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in Embodiment 4 of this invention. The figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in Embodiment 5 of this invention. The figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in Embodiment 6 of this invention. Schematic block diagram of the induction heating cooking appliance in Embodiment 7 of this invention

The first invention includes a top plate on which a pan is placed, a heating coil provided below the top plate for induction heating the pan, an inverter for supplying high-frequency current to the heating coil, and an output of the inverter Course selection for selecting one automatic cooking course from among a control means for controlling cooking, a temperature detection means for detecting the temperature of the pan bottom of the pan, and an automatic cooking course including rice cooking Means, time counting means for measuring time, and a total number determining means for determining the total number of rice cooked in the pan based on signals from the temperature detecting means and the time measuring means, and the total number determining means includes the control When the means detects that the temperature gradient of the temperature detected by the temperature detecting means has changed to negative while heating at a predetermined heating power, from the start of heating based on the time measurement result of the time measuring means, It is determined that the number of cooked rice is larger as the time until it is detected that the temperature gradient of the degree has changed to negative, and the control means outputs the heating output according to the number determined by the combined number determination means. By changing it, it can be changed to an appropriate heating output according to the number of rice cooking at an earlier stage than the case of determining the number of rice cooking using the conventional load amount determination means, Regardless, you can cook more deliciously prepared rice.

  In the second invention, in particular, the total number determining means of the first invention replaces the time from the start of heating until it is detected that the temperature gradient of the temperature detected by the temperature detecting means has changed to a negative temperature. And the control means determines that the total number of rice cooked is larger as the time until the temperature gradient of the temperature changes to negative is longer, and the control means determines the total number determined by the total number determination means. By changing the heating output accordingly, even if the initial temperature varies, it is possible to accurately determine the number of cooked rice and change it to an appropriate heating output according to the number of cooked rice.

  In the third invention, in particular, in the first or second invention, when the time until detecting that the temperature gradient of the temperature detected by the temperature detecting means has changed to negative exceeds a preset limiter time. By determining the maximum total number and performing the heating control, it is possible to cope with the case where there are many rice cooking totals and the temperature drop at the bottom of the pan due to the start of water convection is slow, the total number determination is delayed You can prevent bad rice.

The 4th invention has the 2nd total number judging means which judges that there are few rice cooking total numbers especially, so that a temperature gradient becomes large in any one invention of the 1st-3rd, and a control means is said 2nd. When the total number of cooked rice determined by the total number determining means is different from the total number of cooked rice determined by the first total number determining means, the heating output is changed based on the determination result of the second total number determining means. However, by controlling the heating so that the workmanship does not deteriorate due to the difference in the number of cooked rice, the case where the result of the first sum determination has deviated from the actual number for some reason is also supported. be able to.

  According to a fifth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the temperature gradient reaches from the first temperature judgment value to a second temperature judgment value higher than the first temperature judgment value. And having a second total number determining means for determining that the total number of cooked rices is smaller as the temperature gradient becomes larger, and the control means is configured such that the number of cooked rice determined by the second total number determined means is the first. If it is different from the total number of cooked rice determined by the first total number determination means, the heating output is changed based on the determination result of the second total number determination means, but the workmanship does not deteriorate due to the difference in the total number of rice cooking By performing the heating control, it is possible to cope with the case where the result of the first total number determination deviates from the actual total number for some reason, and even when the initial temperature varies, the rice is cooked accurately. Judge the total number, according to the total number of cooking rice It can be changed to the switching of the heating power.

  In a sixth aspect of the present invention, in particular, in any one of the first to third aspects, the temperature gradient reaches from the first temperature determination value to a second temperature determination value higher than the first temperature determination value. In place of the range, there is a second total number determining means for determining that the total number of cooked rices is smaller as the temperature gradient in the range from when the predetermined temperature determination value is reached until a predetermined time elapses, and the control means Is different from the cooked rice number determined by the first combined number determining means when the combined rice number determined by the second combined number determining means is different from the determination result of the second combined number determining means. When the heating output is changed, but the heating control is performed so that the workmanship does not deteriorate due to the difference in the number of rice cooked, so the result of the first number judgment has deviated from the actual number for some reason. And the initial temperature is Accurately determine the number of cooking if even were Ratsui can be changed to suitable heating output corresponding to the number of cooking if.

  In the seventh invention, in particular, the temperature detecting means of any one of the first to sixth inventions can detect the temperature of the pan bottom directly, not through the top plate, by using an infrared sensor, In cooked rice that is cooked in a relatively low temperature range, the temperature of the pan bottom can be detected more accurately, and the total number of cooked rice can be accurately determined.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an induction heating cooker according to the first embodiment of the present invention.

  In FIG. 1, there are a top plate 1 for placing a pan, an induction heating coil 2 for induction heating the pan, an inverter 3 for supplying high frequency current to the induction heating coil 2, and a control means 4 for controlling the output of the inverter. The temperature detecting means 5 for detecting the temperature of the pan bottom, the course selecting means 6 for selecting one automatic cooking course from the automatic cooking course including rice cooking, the time measuring means 7 for measuring the time, the temperature detecting means 5 and the time measuring Based on the signal of the means 7, it is comprised with the total number determination means 8 which determines the number of rice cooking in a pot.

About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. FIG. 2 is a rice cooking process diagram of the induction heating cooker in the first embodiment of the present invention, and FIG. 3 is a rice cooking process diagram of the induction heating cooker in the first embodiment of the present invention. Some are shown. Table 1 shows a parameter table of the induction heating cooker in the first embodiment of the present invention.

  First, the user puts a pan containing an arbitrary amount of rice and water on the top plate 1 and selects an automatic cooking course by the course selection means 6 for selecting one automatic cooking course from among the automatic cooking courses. And if cooking is started, the control means 4 will heat with predetermined heat power, and will enter into the cooking process among the rice cooking processes shown in FIG.

  When the bottom of the pan is heated by the induction heating coil 2 and the temperature in the pan gradually rises, as shown in FIG. 3, the convection of water starts from the state where it is initially divided into a rice layer and a water layer. Occurring, the water in the upper layer turns downward, and the rice and water are mixed together. As a result, the temperature T of the rising pot bottom once falls at t1 of time t, and rises again.

Since this phenomenon occurs later as the total amount of rice and water increases, the total number determination means 8 detects that the temperature gradient of the temperature detected by the temperature detection means 5 has changed to a negative value. based determines start of heating, the temperature gradient of the temperature is large cooking if the number the more time t ₁ is longer until it is detected that has changed in the negative.

For example, when the control unit 4 starts cooking at 500 W and the time t ₁ until detecting that the temperature gradient of the temperature detected by the temperature detection unit 5 has changed to negative is 60 seconds, the total number determination unit 8 is based on the parameter table of Table 1 and is determined to be 1 go and continues heating at 500 W during the cooking process, but detects that the temperature gradient of the temperature detected by the temperature detecting means 5 has changed to negative. If the time t ₁ until it was 180 seconds, the case number determining means 8 is changed according to it is determined that 3 Go firepower number cooking if the heating output such as raising the 1000W.

Further, for example, when the time t ₁ until detecting that the temperature gradient of the temperature detected by the temperature detecting means 5 has changed to negative is 150 seconds, the total number determining means 8 determines that 2.5 times. It is possible to cope with any number of rice cooking, such as raising the heating power to 850W.

  In the prior art, in order to determine the load amount from the temperature gradient from a certain temperature to a certain temperature rise, when applying the technology to an automatic rice cooking course to determine the total number of rice cooking, to some extent until the total number is determined Therefore, the timing for changing to an appropriate heating output in accordance with the total number of cooked rices is delayed.

  As described above, in the present embodiment, since it can be changed to an appropriate heating output according to the number of cooked rice at an earlier stage than the conventional load amount determination means, regardless of the number of cooked rice, You can cook rice with a better workmanship.

(Embodiment 2)
FIG. 1: shows the schematic block diagram of the induction heating cooking appliance in the 2nd Embodiment of this invention, and a structure is the same as Embodiment 1. FIG.

  The operation and action of the induction heating cooking appliance configured as described above will be described below with reference to FIGS.

  FIG. 2 is a rice cooking process diagram of the induction heating cooker according to the second embodiment of the present invention, and FIG. 4 is a diagram and table showing temperature changes in the rice cooking process of the induction heating cooker according to the second embodiment of the present invention. 2 shows a parameter table of the induction heating cooker in the second embodiment of the present invention.

  First, the user puts a pan containing an arbitrary amount of rice and water on the top plate 1 and selects an automatic cooking course by the course selection means 6 for selecting one automatic cooking course from among the automatic cooking courses. And if cooking is started, the control means 4 will heat with predetermined heat power, and will enter into the cooking process among the rice cooking processes shown in FIG.

  When the pan bottom is heated by the induction heating coil 2 and the temperature in the pan gradually rises, as shown in FIG. 4, the convection of water starts from the state where it is initially divided into a rice layer and a water layer. Occurring, the water in the upper layer turns down, and the temperature of the rising pot bottom once falls due to mixing of rice and water, and then rises again.

Since this phenomenon occurs later as the total amount of rice and water increases, the total number determination means 8 detects that the temperature gradient of the temperature detected by the temperature detection means 5 has changed to a negative value. based determines the time has reached a predetermined temperature T _1, the temperature gradient of the temperature is large enough cooking if the number of time t ₂ becomes longer until it is detected that has changed to negative.

For example, the controller 4 starts cooking at 500 W, and the time t from when the temperature detected by the temperature detector 5 reaches T ₁ = 40 ° C. until it is detected that the temperature temperature gradient has changed to negative. _{When 2} is 90 seconds, the total number determining means 8 determines that the number is 1 and continues heating at 500 W until boiling, but the temperature gradient detected by the temperature detecting means 5 has changed to negative. If the time t ₂ until the detection was 210 seconds, the case number determining means 8 is changed according to it is determined that 3 Go firepower number cooking if the heating output such as raising the 1000W.

Also, for example, when the temperature gradient of the detected temperature of the temperature detection means 5 is time t ₂ until detecting that changes in the negative was 180 seconds, if count determination unit 8 determines that the 2.5 Go It is possible to cope with any number of rice cooking, such as raising the heating power to 850W.

  As described above, in the present embodiment, not only can the heating output be changed to an appropriate heating output that matches the number of cooked rice at an earlier stage than the conventional load amount determination means, but also the initial change due to changes in the water temperature depending on the season It is possible to cope with the case where the temperature varies, and it is possible to cook a more delicious workmanship of rice regardless of the total number of rice cooked.

(Embodiment 3)
Since the configuration of the induction heating cooker itself is the same as that of Embodiment 1 or 2, the description thereof is omitted.

  When the total number determination means 8 of the induction heating cooker in the present embodiment detects that the temperature gradient of the temperature detected by the temperature detection means 5 has changed to negative, heating start or on the basis of the time measurement result of the time measurement means 7 or The time from when the predetermined temperature is reached until when the temperature gradient of the temperature is detected to be negative is set in advance as a limiter time (for example, 210 seconds in the case of the first embodiment, and in the case of the second embodiment). If it exceeds 240 seconds, etc., control is performed so as to increase the heating output by determining the maximum number.

  As described above, in the present embodiment, by providing an upper limit value in the total number determination means 8, the total number determination step can be surely finished and the process can proceed to the next step. Nevertheless, it is possible to prevent the rice from becoming sticky by continuing to heat with low heat.

(Embodiment 4)
FIG. 5: shows the schematic block diagram of the induction heating cooking appliance in the 4th Embodiment of this invention.

  In FIG. 5, the top plate 1 to the time measuring means 7 are the same as those in FIG. 1, the first total number determining means 8 is the same as the total number determining means 8 in FIG. 1, and the second total number determining means. 9 is provided.

  The operation and action of the induction heating cooking appliance configured as described above will be described below with reference to FIG.

  FIG. 6: is a figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance in the 4th Embodiment of this invention.

  The second total number determination means 9 is for determining the number of rice cooking from the temperature gradient in the cooking process shown in FIG. 6, and the determination is made at a temperature higher than the determination end temperature of the first total number determination means 8. finish.

Determines that the higher the cooking if a small number of the temperature gradient [Delta] T ₂ increases. If the number of cooked rice determined by the second combined number determining means 9 is different from the number of cooked rice determined by the first combined number determining means 8, based on the determination result of the second combined number determining means 9. Although the heating output is changed, the heating control is performed so that the workmanship is not deteriorated due to the difference in the number of cooked rice.

  For example, if the first combined number determining means 8 determines that the third combined number and the second combined number determining means 9 also determines that the combined number is 3 combined, the heating power of the cooking process is continuously heated at 1000 W. When the combined number determination means 9 determines that 2 combined numbers, the control means 4 changes the heating power of the cooking process until boiling to 700 W, but in this case, the second combined number determination ends from the first combined number determination end. The heating power until is higher than the heating power suitable for the actual number of cooked rice, and because the temperature rise in the pan is fast, the rice does not swell sufficiently, so it is hard by increasing the time of the next boiling maintenance process You can prevent it from being finished in rice.

  As described above, in the present embodiment, the first total number determination unit 9 is provided with the second total number determination unit 9 that measures the temperature gradient with a longer span than the first total number determination unit 8. Because the determination result by can be corrected, it is possible to cook more deliciously prepared rice.

(Embodiment 5)
FIG. 5: shows the schematic block diagram of the induction heating cooking appliance in the 5th Embodiment of this invention, and a structure is the same as Embodiment 4. FIG.

  About the induction heating cooking appliance comprised as mentioned above, operation | movement and an effect | action are demonstrated, referring FIG. FIG. 7 shows the temperature change of the rice cooking process of the induction heating cooker in the 5th Embodiment of this invention.

  The second total number determination means 9 is for determining the number of rice cooking from the temperature gradient in the cooking process shown in FIG. 7, and the determination is made at a temperature higher than the determination end temperature of the first total number determination means 8. finish.

The number of cooked rice is determined from the temperature gradient ΔT _{5 in} the range from the first temperature determination value T ₃ to the second temperature determination value T ₄ higher than T ₃ , and as ΔT ₅ increases. It is determined that the number of cooked rice is small.

  If the number of cooked rice determined by the second combined number determining means 9 is different from the number of cooked rice determined by the first combined number determining means 8, based on the determination result of the second combined number determining means 9. Although the heating output is changed, the heating control is performed so that the workmanship is not deteriorated due to the difference in the number of cooked rice.

  For example, if the first combined number determining means 8 determines 2 combined and the second combined number determining means 9 also determines 2 combined, heating is continued at 700 W as the heating power of the cooking process, When the total number determination means 9 determines that the number is 3, the thermal power from the end of the first total number determination to the end of the second total number determination is lower than the thermal power suitable for the actual number of cooked rice, and the temperature in the pan rises. However, since the evaporation of moisture is insufficient, the control means 4 changes the heating power to 1000 W and further sets the boiling duration of the cooking process to be long, thereby preventing the rice from becoming sticky. Can do.

  As described above, in the present embodiment, by providing the second total number determination means 9 for measuring the temperature gradient with a longer span than the first total number determination means 8, the first total number determination is performed. Not only can the correction result be corrected, but also when the initial temperature varies due to changes in the water temperature depending on the season, etc., it is possible to cook more deliciously prepared rice.

(Embodiment 6)
FIG. 5: shows the schematic block diagram of the induction heating cooking appliance in the 5th Embodiment of this invention, and a structure is the same as Embodiment 4 and 5. FIG.

  About the induction heating cooking appliance comprised as mentioned above, operation | movement and an effect | action are demonstrated, referring FIG. FIG. 8: is a figure which shows the temperature change of the rice cooking process of the induction heating cooking appliance.

  The second combined number determining means 9 is for determining the number of cooked rice from the temperature gradient in the cooking process shown in FIG. 8, and the determination is made at a temperature higher than the determination end temperature of the first combined number determining means 8. finish.

The number of cooked rice is determined from the temperature gradient ΔT _{7 in} the range t ₃ from when the predetermined temperature determination value T ₆ is reached until a predetermined time elapses, and it is determined that the larger the ΔT ₇ is, the smaller the number of cooked rice is. . If the number of cooked rice determined by the second combined number determining means 9 is different from the number of cooked rice determined by the first combined number determining means 8, based on the determination result of the second combined number determining means 9. Although the heating output is changed, the heating control is performed so that the workmanship is not deteriorated due to the difference in the number of cooked rice.

For example, if the first combined number determining means 8 determines that the third combined number and the second combined number determining means 9 also determines that the combined number is 3 combined, the heating power of the cooking process is continuously heated at 1000 W. When the combined number determination means 9 determines that 2 combined numbers, the control means 4 changes the heating power of the cooking process until boiling to 700 W, but in this case, the second combined number determination ends from the first combined number determination end. The heating power until is higher than the heating power suitable for the actual number of cooked rice, and because the temperature rise in the pan is fast, the rice does not swell sufficiently, so it is hard by increasing the time of the next boiling maintenance process You can prevent it from being finished in rice.

  As described above, in the present embodiment, by providing the second total number determination means 9 for measuring the temperature gradient with a longer span than the first total number determination means 8, the first total number determination is performed. Not only can the correction result be corrected, but also when the initial temperature varies due to changes in the water temperature depending on the season, etc., it is possible to cook more deliciously prepared rice.

(Embodiment 7)
FIG. 9: shows the schematic block diagram of the induction heating cooking appliance in the 7th Embodiment of this invention. 9, 1 to 4 and 6 to 8 are the same as those in FIG. 1, and 5 is an infrared sensor.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The temperature detection means 5 (infrared sensor) is constituted by a photodiode, and detects the thermal energy radiated from the bottom of the pan through the top plate 1. This infrared sensor detects the temperature of the pan bottom by changing the amount of light, which is thermal energy, into current or voltage.

  Thus, since the temperature detection means 5 detects the pan bottom in a non-contact manner and calculates the temperature of the pan bottom, the responsiveness is fast and the temperature of the pan bottom can be detected accurately. For this reason, the power control of the control means 4 with respect to the induction heating coil 2 can react immediately to the temperature change of the pan bottom.

  As described above, in the present embodiment, by using an infrared sensor as a means for detecting the temperature of the pan bottom, in rice cooking that is cooked in a relatively low temperature range, the temperature change of the pan bottom during cooking is accurately performed. It is possible to detect and accurately determine the total number of cooked rice, so that more delicious workmanship can be cooked.

  As described above, the induction heating cooker according to the present invention can be changed to an appropriate heating output according to the number of cooked rice at an earlier stage than before, and it is more delicious regardless of the number of cooked rice. Rice can be cooked.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Induction heating coil 3 Inverter 4 Control means 5 Temperature detection means 6 Course selection means 7 Time measuring means 8 Total number determination means (1st total number determination means)
9 Second total number determining means

Claims (7)

A top plate for placing a pan; a heating coil provided below the top plate for induction heating the pan; an inverter for supplying a high-frequency current to the heating coil; and a control means for controlling the output of the inverter. A temperature detecting means provided below the top plate for detecting the temperature of the pan bottom of the pot; a course selecting means for selecting one automatic cooking course from an automatic cooking course including rice cooking; And a total number determination means for determining the total number of cooked rice in the pan based on signals from the temperature detection means and the time measurement means, and the total number determination means is heated by the control means with a predetermined heating power. When detecting that the temperature gradient of the temperature detected by the temperature detection means has changed to negative, the temperature gradient of the temperature from the start of heating based on the timing result of the timing means Induction heating cooking in which it is determined that the number of cooked rice is larger as the time until it is detected that it has changed to negative is longer, and the control unit changes the heating output according to the number determined by the combined number determination unit. vessel. Instead of the time until the detection of the temperature gradient of the temperature detected by the temperature detection means from the start of heating to the time when the total number determination means reaches a predetermined temperature, the temperature gradient of the temperature becomes negative. 2. The determination according to claim 1, wherein it is determined that the number of cooked rice is larger as the time until the change is detected is longer, and the control unit changes the heating output according to the number determined by the total number determination unit. Induction heating cooker. The heating control is performed by determining the maximum number of times when the time until detecting that the temperature gradient of the temperature detected by the temperature detecting means has changed to a negative value exceeds a preset limiter time. The induction heating cooker described in 1. It has the 2nd total number determination means which determines that there are few rice cooking totals, so that a temperature gradient becomes large, and the control means determines the 1st total number of said rice cooking numbers determined by the 2nd total number determination means. The heating output is changed based on the determination result of the second total number determination means when the number is different from the total number of cooked rice determined by the means, but the heating control is performed so as not to deteriorate the workmanship due to the difference in the number of cooked rice. Item 4. The induction heating cooker according to any one of items 1 to 3. The temperature gradient is a range from the first temperature determination value to the second temperature determination value that is higher than the first temperature determination value, and the second is determined that the total number of cooked rices decreases as the temperature gradient increases. If the total number of cooked rice determined by the second total number determining unit is different from the total number of cooked rice determined by the first total number determining unit, the control unit The induction heating cooking according to any one of claims 1 to 3, wherein the heating output is changed based on the determination result of the total number determination means, but the heating control is performed so that the workmanship is not deteriorated due to a determination difference of the total number of rice cooking. vessel. The temperature gradient is replaced with a range from the first temperature determination value to the second temperature determination value higher than the first temperature determination value until a predetermined time elapses after reaching the predetermined temperature determination value. The second total number determining means for determining that the total number of cooked rices is smaller as the temperature gradient in the range becomes larger, and the control means has the first total number of cooked rice determined by the second total number determined means. If the total number of rice cooked is different from the total number determined by the total number determining means, the heating output is changed based on the determination result of the second total number determining means. The induction heating cooking appliance of any one of Claims 1-3 which perform control. The induction heating cooker according to any one of claims 1 to 6, wherein the temperature detection means uses an infrared sensor.

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