JP2853365B2 - Temperature control device for induction heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for an induction heating cooker used in ordinary households.

[0002]

2. Description of the Related Art FIGS. 5, 6 and 7 show a method of measuring a temperature in a general cooking appliance having a temperature control function using a conventional microcomputer.

First, in FIG. 5, Rth is a thermistor of the temperature detecting means, and the resistance value of the thermistor Rth decreases as the temperature rises.

[0004] COMP is a comparator that compares the voltages at points a and b. If point a is higher than point b, it outputs High, and if it is the opposite, it outputs Low and outputs the result. Is input to the input 1 terminal of the microcomputer.

R24 to R31 are resistors which change the voltage at point b obtained by dividing a DC power supply by a thermistor Rth and a resistor R23 by opening or closing a switch constituted by a transistor or the like in a microcomputer. .

FIG. 6 shows the operation at that time. First, in the F section, when the switches SW21 to SW28 are open, the voltage at the point b is a voltage determined by the resistance values of the thermistors Rth and R23.

Here, when the switch SW21 is closed, the voltage at the point b becomes the combined resistance value of R23 and R24 = 1 / as in the G section.
(1 / R23 + 1 / R24) and the divided voltage of the thermistor Rth. When this voltage is compared with the voltage at the point a by the comparator COMP, the output of the comparator COMP becomes Hi.
gh.

As described above, if the switch SW21 is opened and closed sequentially, the voltage at the point b becomes higher than the voltage at the point a at the point H, that is, when the switch SW23 is closed, and the output of the comparator COMP is output. Is reversed from before.

At this time, when the switch SW23 is closed, the input to the input 1 terminal of the microcomputer is inverted, and the temperature measured by the thermistor Rth at that time is set by the total resistance value of the resistors R24 to R26. The temperature is determined by a microcomputer.

When the measured temperature of the thermistor Rth further increases and its resistance decreases, the switch SW2
3, the output of the comparator COMP is not inverted, and the output of the comparator COMP is inverted only after the switch SW24 is closed.
It is determined that the temperature set by the total resistance value of 7 has been reached.

In the circuit configuration of the conventional example shown in FIG. 5, the control temperature can be easily changed by changing the resistance values of the resistors R24 to R31.

Another conventional temperature measuring method has a circuit configuration shown in FIG. Rth is a thermistor of the temperature detecting means as in FIG.
Is such that its resistance value decreases as the temperature rises.
R41 is a resistor, and this resistance value is generally set to approximately the center of the change in Rth in the temperature measurement range by the thermistor.

In the temperature measurement operation according to this configuration, when Rth changes due to a temperature change, the voltage at point c obtained by dividing the DC power supply Vdd by the thermistor Rth and the resistor R41 according to the change is applied to the A / D input terminal of the microcomputer. The resistance value of the thermistor Rth, that is, the detection temperature of the thermistor Rth is determined by comparing the read voltage and the data read in advance in the microcomputer with the read voltage. In this configuration, the first conventional example of FIG. As described above, since the switching operation is not performed at high speed, the device operates stably with respect to noise entering from a thermistor or the like.

In the circuit configuration shown in FIG.
Reference numeral 42 is for absorbing noise entering from a thermistor or the like.

In each of FIGS. 5 and 7, the control means controls the high-frequency power supply based on the measured temperature results to maintain the load temperature at a preset value.

[0016]

However, in the configuration of the conventional temperature control device of the cooking device shown in FIG. 5, the capacitor C22 absorbs the noise in order to prevent the microcomputer from malfunctioning due to the noise entering from the thermistor or the like. However, in induction heating cookers, the electric field of the induction heating device causes much larger noise to enter the wiring extending from the thermistor provided near the pot as the load to the microcomputer than the general cooking equipment. As the capacitance of the capacitor C22 is increased to absorb the large noise, FIG.
As shown by the dashed line, there is a problem that the temperature cannot be measured because the pulse waveform of the temperature detection operating at a high speed is distorted because the temperature control is performed sensitively.

Further, with emphasis on noise prevention, FIG.
When the circuit configuration shown in (1) is adopted, the first switching operation is not performed when the A / D conversion input terminal is used.
By adjusting the capacitances of the capacitors C41 and C42, a large noise from the induction heating device can be absorbed. Since the data was incorporated into the microcomputer as a program, there was a problem that the control temperature once set could not be changed.

The present invention solves the above-mentioned problems. An induction heating cooker that operates stably without malfunction even with a large noise of an induction heating cooker and can change the setting of the control temperature by a simple method. A first object is to provide a temperature control device for a cooking device.

A second object of the present invention is to provide an induction system in which the correction of the set temperature with respect to the initial set temperature in the memory of the microcomputer is performed stably regardless of whether the set temperature is high or low. It is to provide a temperature control device of a cooking device.

A third object of the present invention is to provide a second method for temperature correction.
It is an object of the present invention to provide a temperature control device for an induction heating cooker that prevents the temperature correction from being performed irregularly due to a temperature detection failure of the thermistor of the temperature detection element or noise of the induction heating cooker.

[0021]

To achieve the above object, a first means of the present invention is to provide an induction heating device comprising a high-frequency power supply and a heating coil, a DC power supply for outputting a predetermined DC voltage, and One or more A / D operated by DC power supply
A microcomputer having a conversion input terminal, one or more input terminals, and a plurality of output terminals; a thermistor of a first temperature sensing element for measuring a temperature of a load such as a pan heated by the induction heating device; A thermistor of a second temperature sensing element for measuring the temperature of a load such as a pot heated by an induction heating device, and a first reference resistor and the thermistor of the first temperature sensing element connected at both ends of a circuit connected in series. By applying a DC power supply and inputting a voltage obtained by dividing the voltage of the DC power supply by the resistance value of the first reference resistor and the resistance value of the first thermistor to an A / D conversion input terminal of the microcomputer, the voltage is divided. The first voltage is compared with a plurality of voltage values corresponding to a plurality of predetermined control temperatures which can be arbitrarily selected by the user and stored in the microcomputer in advance. DC power is applied to both ends of a circuit in which a first temperature measuring means for measuring a temperature detected by the mister and a second reference resistor and a thermistor of the second temperature detecting element are connected in series. Second temperature measuring means for measuring a detection temperature of the second thermistor by comparing a voltage obtained by dividing the voltage of the DC power supply by a resistance and a resistance value of the second thermistor with a predetermined reference voltage; Connecting a plurality of resistors to a plurality of output terminals of the microcomputer,
By connecting this output terminal to a positive voltage side or a negative voltage side of the DC power supply, or to a state in which it is not connected to any of them, the resistance value of the second reference resistance is changed to change the second temperature measurement means. Means for measuring a plurality of control temperatures by means of the first and second temperature measuring means at the time when the temperature measured by the second temperature measuring means reaches a predetermined temperature set by the reference resistance changing means. Temperature correction means for storing the measured temperature of the means in place of the control temperature previously stored in the microcomputer,
The induction heating device is controlled based on an output of the first temperature measuring device so that the temperature becomes an arbitrary temperature selected from a plurality of predetermined temperatures stored in the microcomputer and corrected by the temperature correcting device. Control means for performing
Is provided.

The second means is such that, in the first means, when the heating by the induction heating device is started, the temperature measured by the second temperature measuring means is higher than a predetermined control temperature set by the reference resistance changing means. In this case, the heating is stopped until the measured temperature of the second temperature measuring means becomes lower than the predetermined control temperature set by the reference resistance changing means, and once the measured temperature of the second temperature measuring means is reduced to the predetermined control temperature. At which point the first
By controlling the induction heating device to the control temperature stored in the microcomputer by the temperature measuring means, the temperature correcting means is operated only while the detected temperature of the second temperature measuring means is rising. .

The third means is the first means for measuring the first temperature when the temperature measured by the second temperature measuring means by the temperature correcting means reaches a predetermined temperature set by the reference resistance changing means. When the measured temperature of the means is replaced with the control temperature stored in the microcomputer in advance, the measured temperature of the first temperature measuring means at this time,
The temperature correcting means operates only when the difference between the stored control temperatures is equal to or lower than a predetermined temperature.

[0024]

According to the first means, the temperature control device for the induction heating cooker according to the present invention comprises: a temperature measurement input for adjusting the temperature stored in the microcomputer;
The first temperature measuring means uses an A / D conversion input terminal which operates stably even with noise from a high frequency power supply of the induction heating cooker, and the control temperature is controlled by a second temperature measuring means. Is determined by correcting the temperature measured by the first temperature measuring means when the temperature measured by the first resistance measuring means reaches the temperature arbitrarily set by the reference resistance changing means.

In the second means, when the heating by the induction heating device is started and the measured temperature of the second temperature measuring means is higher than the control temperature set by the reference resistance changing means, the second means is used. Stop heating until the measured temperature of the temperature measuring means once falls below the control temperature set by the reference resistance changing means,
From that time, the temperature is increased by aiming at the control temperature stored in the microcomputer in accordance with the input of the measured temperature of the first temperature measuring means, and when the temperature is corrected by the temperature correcting means by the first means, This correction operation can be limited during the temperature rise. In other words, if the control temperature stored in the initial microcomputer is set higher than the required upper limit of the control temperature, the temperature will always be corrected to a temperature lower than the higher temperature. It is.

In the third means, when the control temperature is corrected by the first means, the first temperature at the time when the temperature measured by the second temperature measuring means reaches the temperature arbitrarily set by the reference resistance changing means is reached. The temperature is corrected only when the difference between the temperature measured by the first temperature measuring means and the temperature previously stored in the microcomputer is within a predetermined temperature difference. Thus, even when the second temperature measuring means erroneously measures the temperature due to noise or the like generated from the high-frequency power supply of the induction heating cooker, the temperature correcting means is prevented from operating irregularly.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of a temperature control device for a cooking device according to the present invention. In FIG. 1, 1
Is an induction heating device, which comprises a high-frequency power supply 1a for generating a high-frequency voltage from a commercial AC power supply and a heating coil 1b. 2 is a DC voltage Vdd = 5V (D
C) is a DC power supply, 3 is a microcomputer, and has an A / D conversion input terminal and a general High / Low
And an output terminal for detecting the input of the input.

Reference numeral 4 denotes a thermistor serving as a first temperature detecting element, which measures the temperature of the pot 12 serving as a load. 5 is the second
The temperature of the pot 12 is measured in the same manner as the first thermistor 4. The thermistors 4 and 5 of the two temperature detecting elements are arranged close to each other to measure the same temperature.

Reference numeral 6 denotes first temperature measuring means, which applies a voltage obtained by dividing Vdd of the DC power supply 2 by the first reference resistor R1 and the resistance value Rth1 of the first thermistor 4 to an A / D input terminal of the microcomputer. By taking in, the resistance value of the first thermistor 4 at that time, that is, the detected temperature of the first thermistor 4 is measured by comparing with the data stored in the memory of the microcomputer.

7 is a second temperature measuring means, and 8 is a reference resistance changing means. The temperature measuring operation by the second temperature measuring means 7 is as follows. First, when the switch SW1 inside the microcomputer of the reference resistance changing means 8 is closed, the voltage comparator CO
The input V− to MP is the resistance Rt of the second thermistor 5
h2 and the combined resistance value 1/2 of the second reference resistances R4 and R5.
A voltage obtained by dividing Vdd of the DC power supply 2 by (1 / R4 + 1 / R5). This input voltage V− is connected to resistors R2 and R2.
3, and the result is taken into the input 1 terminal of the microcomputer 3 to bring the temperature to the second temperature set by the combined resistance value of the resistors R4 and R5.
It is determined whether or not the resistance value of the thermistor 5 is satisfied.

Then, by opening the switch SW1 and closing the switch SW2, the resistors R5 and R6
It is determined whether or not the second thermistor 5 has reached the temperature set by the combined resistance value of the resistance R4 and the resistance value of the resistor R4. That is, when the switches SW1 to SW8 are sequentially switched, the resistance value switched by the reference resistance changing means 8 is sequentially compared with the resistance value of the second thermistor 5 based on the detected temperature at that time.
The temperature set by the combined resistance value of the reference resistance changing means 8 when the output of MP is inverted is the detection temperature of the second thermistor at that time, and the temperature is measured by the number of switches SW, that is, eight stages of temperatures. Things.

Reference numeral 9 denotes a noise preventing means, in which high-frequency noise generated from the induction heating device 1 enters the A / D input terminal and becomes first.
This prevents the temperature measuring means 6 from malfunctioning, and comprises a capacitor C1 and an electrolytic capacitor C2.

Numeral 10 denotes a temperature correcting means, which is used to calculate the temperature measured by the first temperature measuring means 7 when the temperature measured by the second temperature measuring means 7 reaches a predetermined temperature set by the reference resistance changing means 8. The control temperature is stored in the memory of the microcomputer 3 in place of the control temperature stored in advance.

Reference numeral 11 denotes control means for controlling the temperature of the pan 12 as a load to a predetermined temperature based on the memory inside the microcomputer and the measurement result of the first temperature measurement means 7.

Next, the operation of the first embodiment will be described with reference to the drawings. FIG. 2 is a timing chart showing the operation of the first embodiment of the present invention. Here, FIG. 2A shows a measurement result of the first temperature measuring means 6, and FIG. 2B shows a measurement result of the second temperature measuring means 7. FIG.
(A) of FIG.
Since the measurement is performed at a resolution of 256 steps of the D input terminal, the measurement result becomes a smooth curve. In FIG. 2B, since the measurement points of the reference resistance changing means 8 are eight points, the temperature judgment is eight. The measurement result comes out within the stage.

In FIG. 2, when the temperature control is started at time 0, first, the control means 11 controls the induction heating apparatus 1 so that the temperature rises toward the initial temperature set value S1 stored in the memory of the microcomputer 3. I do. At this time, since the first thermistor 4 and the second thermistor 5 are provided close to each other, the measured temperature rises in substantially the same manner. When the second thermistor 5 exceeds a predetermined temperature T1 set by the reference resistance changing means 8 at the point A during the temperature rise, the correcting means 10
Works, and the input S1 of the first temperature measuring means 6 at the point A
0 as a control temperature and control means 11 for maintaining the temperature.
Is used to control the induction heating device 1.

In the second embodiment, the induction heating device 1
If the measured temperature of the second temperature measuring means 7 is higher than the predetermined control temperature set by the reference resistance changing means 8 at the time when heating is started at The heating is stopped until the temperature becomes lower than the predetermined control temperature set by the resistance changing means 8, and once the temperature measured by the second temperature measuring means 7 becomes lower than the predetermined control temperature, the first temperature measurement is performed. By controlling the induction heating device 1 so that the control temperature becomes the control temperature stored in the microcomputer by the means 6, the temperature correcting operation of the correcting means 10 in the first embodiment is limited to the time during the temperature rise.

FIG. 3 is a timing chart showing the operation of the second embodiment. FIG. 3 shows a case where the load temperature is higher than the control temperature at the start of heating, assuming, for example, continuous cooking. FIG.
FIG. 3A shows the temperature measured by the first temperature measuring means 6, FIG.
(B) shows the measured temperature of the second temperature measuring means 7.

When the heating is to be started at time 0, the temperature measured by the second temperature measuring means 7 is set to the control temperature T set by the reference resistance changing means 8 as shown in FIG.
Since the temperature is higher than 2, the heating is stopped until the measured temperature of the second temperature measuring means 7 falls below the control temperature T2 at the point B, and after the point B, the measured temperature of the first temperature measuring means 6 is inputted to the first temperature measuring means 6. Therefore, the induction heating device 1 is controlled by the control means 11 so as to increase the temperature aiming at the initial temperature set value S2 stored in the memory of the microcomputer 3.

When the temperature measured by the second temperature measuring means 7 exceeds the control temperature T2 at the point C during the temperature rise, the correcting means 10 operates, and the temperature of the first temperature measuring means 6 at the point C is increased. The control unit 11 controls the induction heating device 1 so as to maintain the temperature with the input S20 as a control temperature.

With this, if the initial temperature set value stored in the memory of the microcomputer 3 is set higher than the control temperature of the second temperature measuring means 7 set by the reference resistance changing means 8, The control means 10 always operates, and the control temperature to be obtained can be set arbitrarily only by changing the resistance value of the reference resistance changing means 8.

In the third embodiment, when the control temperature is corrected by the temperature correcting means 10 in the first embodiment, the temperature measured by the second temperature measuring means 7 is arbitrarily set by the reference resistance changing means 8. The temperature is corrected only when the difference between the temperature measured by the first temperature measuring means 6 at the time when the control temperature reaches the preset temperature and the temperature previously stored in the microcomputer 3 is within a predetermined temperature difference. Things. As a result, the second temperature measuring means 6
Even if the temperature is erroneously measured due to noise or the like generated from the high-frequency power supply 1a of the induction heating device 1, the temperature correcting means 10 is prevented from operating irregularly.

FIG. 4 is a timing chart showing the operation of the third embodiment. FIG. 4A shows the measured temperature of the first temperature measuring means 6, and FIG. 4B shows the measured temperature of the second temperature measuring means 7. In FIG. 3, when the temperature measured by the second temperature measuring means 7 becomes abnormal due to noise or the like generated from the high-frequency power supply of the induction heating device at the point D while the temperature continues to be increased after the start of heating. First
If the temperature difference between the measured temperature S0 of the temperature measuring means 6 and the control temperature S3 stored in the memory of the microcomputer 3 is 20 bits or more out of the 256 resolutions of the A / D input terminal, it is determined that this is abnormal. Then, the operation of the temperature compensating means 10 is prohibited, and then the temperature is increased. When the measured temperature of the second temperature measuring means 7 exceeds the control temperature T3 set by the reference resistance changing means 8 at the point E, the temperature is increased. Is corrected.

[0045]

As described above, the first effect of the present invention is that the thermistor of the first temperature detecting element and the temperature of the second temperature detecting element for measuring the temperature of a load such as a pan heated by the induction heating device are provided. A DC power supply is applied to both ends of a circuit in which a thermistor, a first reference resistor and a thermistor of a first temperature detecting element are connected in series, and the DC power supply is applied by the resistance values of the first reference resistor and the first thermistor. By inputting the divided voltage to the A / D conversion input terminal of the microcomputer, the divided voltage and a plurality of predetermined control temperatures stored in the microcomputer and which can be arbitrarily selected by the user in advance. A first temperature measuring means for measuring a detected temperature of the first thermistor by comparing a plurality of voltage values corresponding to the above, and a second reference resistor and a thermistor of the second temperature detecting element are connected in series. DC power is applied to both ends of the circuit,
A second temperature for measuring a detection temperature of the second thermistor by comparing a voltage obtained by dividing the voltage of the DC power supply with the resistance values of the second reference resistor and the second thermistor with a predetermined reference voltage. By connecting a plurality of resistors to the measuring means and a plurality of output terminals of the microcomputer and connecting the output terminal to the positive voltage side or the negative voltage side of the DC power supply, or to a state in which neither is connected to any of them, the second A reference resistance changing means for changing a resistance value of the reference resistance of the reference temperature so that a plurality of control temperatures can be measured by the second temperature measuring means;
A noise prevention means for preventing electric noise generated from the induction heating device from entering the microcomputer by a capacitor connected to the A / D conversion input terminal; and a reference resistance changing means for controlling the temperature measured by the second temperature measurement means. Temperature correcting means for storing the measured temperature of the first temperature measuring means at the time when the temperature reaches the predetermined temperature set by the control temperature in place of the control temperature previously stored in the microcomputer;
Control means for controlling the induction heating device based on the output of the first temperature measuring means so that the temperature becomes an arbitrary temperature selected from a plurality of predetermined temperatures stored in the microcomputer corrected by the temperature correcting means; The input of the temperature measurement for adjusting to the set temperature is stably performed by the first temperature measuring means based on the data stored in the memory in the microcomputer, and the control temperature is Since the temperature measured by the second temperature measuring means reaches the temperature arbitrarily set by the reference resistance changing means and is determined by correcting the temperature measured by the first temperature measuring means, the control temperature can be changed. The first temperature measuring means, which can be easily performed and serves as a reference for the temperature adjusting operation, does not perform a high-speed switching operation unlike the second temperature measuring means, and thus has a high frequency. In which it is possible to obtain a temperature control device of an induction heating cooker that operates the temperature adjustment even without stable malfunction against the source of noise.

A second effect of the present invention is that when the temperature measured by the second temperature measuring means is higher than the predetermined control temperature set by the reference resistance changing means at the time when heating is started by the induction heating device, The heating is stopped until the measured temperature of the second temperature measuring means becomes lower than the predetermined control temperature set by the reference resistance changing means, and the measured temperature of the second temperature measuring means is once lower than the predetermined control temperature. At this point, the first temperature measuring means controls the induction heating device to the control temperature stored in the microcomputer, so that the temperature correcting means operates only when the detected temperature of the second temperature measuring means is rising. Therefore, no matter what the temperature of the load at the time of the start of heating, the temperature of the induction heating cooker which always performs temperature adjustment at the temperature corrected by the control temperature set by the reference resistance changing means. In which it is possible to obtain a control device.

A third effect of the present invention is that the temperature compensating means uses the first temperature measuring means when the temperature measured by the second temperature measuring means reaches the predetermined temperature set by the reference resistance changing means. When replacing the measured temperature with the control temperature previously stored in the microcomputer, when the difference between the measured temperature of the first temperature measuring means at this time and the stored control temperature is equal to or less than a predetermined temperature. Since only the temperature correction means operates, even when the temperature measurement operation malfunctions due to the noise of the high-frequency power supply, a temperature control device for an induction heating cooker that operates stably without correcting to an abnormal control temperature is obtained. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an induction heating cooker according to an embodiment of the present invention.

FIG. 2 is a timing chart showing the operation of the first embodiment of the present invention.

FIG. 3 is a timing chart showing the operation of the second embodiment of the present invention.

FIG. 4 is a timing chart showing the operation of the third embodiment of the present invention.

FIG. 5 is a configuration diagram of a first conventional heating cooker;

FIG. 6 is a timing chart showing the operation of the first conventional example.

FIG. 7 is a configuration diagram of a second example of a conventional cooking device;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Induction heating apparatus 2 DC power supply 3 Microcomputer 4 Thermistor of 1st temperature detection element 5 Thermistor of 2nd temperature detection element 6 1st temperature measurement means 7 2nd temperature measurement means 8 Reference resistance change means 9 Noise prevention Means 10 Temperature correction means 11 Control means 12 Pot

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05B 6/12

Claims (3)

(57) [Claims] An induction heating apparatus comprising a high-frequency power supply and a heating coil, a DC power supply for outputting a predetermined DC voltage, one or more A / D conversion input terminals operated by the DC power supply, and one or more A / D conversion input terminals. A microcomputer having an input terminal and a plurality of output terminals, a thermistor of a first temperature detecting element and a thermistor of a second temperature detecting element for measuring the temperature of a load such as a pan heated by the induction heating device, A DC power supply is applied to both ends of a circuit in which a first reference resistor and a thermistor of the first temperature detecting element are connected in series, and the voltage of the DC power supply is determined by the resistance values of the first reference resistor and the first thermistor. By inputting the divided voltage to the A / D conversion input terminal of the microcomputer, the divided voltage can be arbitrarily selected by the user stored in the microcomputer in advance. A first temperature measuring means for measuring a detected temperature of the first thermistor by comparing a plurality of voltage values corresponding to a plurality of predetermined control temperatures, a second reference resistor, and the second A DC power supply is applied to both ends of a circuit connected in series with a thermistor of the temperature detecting element, and a voltage obtained by dividing the voltage of the DC power supply by the second reference resistance and the resistance value of the second thermistor is applied to a predetermined reference. A second temperature measuring means for measuring a temperature detected by the second thermistor by comparing the voltage with a voltage; a plurality of resistors connected to a plurality of output terminals of the microcomputer; By switching to a state connected to the negative voltage side or the negative voltage side, or to a state not connected to any of them, the resistance value of the second reference resistor can be changed and a plurality of control temperatures can be measured by the second temperature measuring means. The microcomputer measures the measured temperature of the first temperature measuring means when the temperature measured by the second temperature measuring means reaches a predetermined temperature set by the reference resistance changing means. A temperature correcting means for storing the control temperature stored in advance in the microcomputer, and a plurality of predetermined temperatures stored in the microcomputer corrected by the temperature correcting means based on the output of the first temperature measuring means. And a control means for controlling the induction heating device so as to reach an arbitrary temperature selected from the group consisting of: 2. When the temperature measured by the second temperature measuring means is higher than a predetermined control temperature set by the reference resistance changing means at the time when heating is started by the induction heating device, the second temperature measuring means is used. The heating is stopped until the measured temperature of the second temperature measuring means becomes lower than the predetermined control temperature set by the reference resistance changing means, and once the measured temperature of the second temperature measuring means becomes lower than the predetermined control temperature, the first heating is stopped. The temperature correction means operates only when the detected temperature of the second temperature measurement means rises by controlling the induction heating device to the control temperature stored in the microcomputer by the temperature measurement means. A temperature control device for an induction heating cooker according to the above. 3. The microcomputer calculates the temperature measured by the first temperature measuring means when the temperature measured by the second temperature measuring means reaches a predetermined temperature set by the reference resistance changing means. When replacing the control temperature with the control temperature stored in advance, the temperature correction means operates only when the difference between the measured temperature of the first temperature measuring means at this time and the stored control temperature is equal to or lower than a predetermined temperature. The temperature control device for an induction heating cooker according to claim 1.