JP2015093177A - Temperature detection device for heating cooker and usage for the same, and temperature detector for heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detection device which has a "pan existence" detection function detecting existence or non-existence of a heating-target material and a temperature detection function for detecting a temperature of the heating-target material placed on the pan, and which is capable of detecting even open fault of a resistance detection element.SOLUTION: Heating-target detection means 4 is arranged in series between a resistance detection element 5 and a resistance value detection means 10a, and an auxiliary resistance 9 for fault detection is provided to the heating-target detection means 4 on the side of the resistance detection element 5 in parallel with the resistance detection element 5.

Description

  In the present invention, the fixed side support that is fixedly provided on the heating cooker and the bottom of the object to be heated placed on the placement portion of the heating cooker are pressed down as they come into contact with each other. The movable side support that is supported by the upper end of the fixed side support in a state where it can be moved up and down and is urged to return to the upper side, and the portion of the movable side support that abuts the heated object Provided with a resistance detection element on the back surface of the contact body, and provided with resistance detection means for detecting the resistance value of the resistance detection element and the resistance detection element, the moving side support being on the lower side A temperature detecting device for a cooker, which is provided with a heated object detecting means for closing a circuit between the resistance detecting element and the resistance value detecting means in series with the resistance detecting element, and a use thereof. Regarding the method.

  Such a temperature detection device for a heating cooker is used in a heating cooker that heats an object to be heated such as a stove or a rice cooker. Such a heating cooker has a temperature detection function for detecting the temperature of the object to be heated and a so-called “hot pot detection” function for detecting whether the object to be heated is normally stored and placed. Is provided. The latter function is a function for operating the heating means in a state where the object to be heated is truly placed at a predetermined position, and the former function is mainly a function for preventing overheating of the object to be heated. It is.

For example, in the temperature detection device disclosed in Patent Document 1, in the rice cooker provided with the annular electric heating plate 80 (heating means), the temperature of the bottom of the inner pot 70 (corresponding to an object to be heated) heated by the heating means. The holder 11 (corresponding to the contact body) can be brought into contact with the bottom of the inner pot 70 placed in the outer pot 60 (corresponding to the fixed-side support). As described above, the outer case 20 as a support tube is disposed inside the annular heating means, and the temperature of the head of the holder 11 is detected as the temperature of the object to be heated by the temperature detection device.
In such a temperature detection device for a cooking device, a coil spring 50 (corresponding to a biasing means) that biases the holder 11 upward is used (Patent Document 1).

2 (a) and 2 (b) in this specification are a transcription of FIGS. 1 and 5 of Patent Document 1. FIG.
In the temperature detection device disclosed in Patent Document 1, the temperature of the bottom of the inner pot can be detected by detecting the resistance value of the thermistor 40 disposed on the head of the holder 11.
On the other hand, the reed switch 30 connected in series with the thermistor 40 is provided, and the reed switch 30 is sensitive to the magnet 22 provided in the outer case 20 by placing the inner pot in the outer pot. Thus, the resistance value of the thermistor 40 can be detected, and “detection of pan” can be performed based on the resistance value.

  In this state, by detecting the resistance value of the thermistor 40 on the heating control unit 100 side, the temperature of the inner pot 70 (specifically, the temperature at the bottom of the inner pot) can also be detected appropriately.

FIG. 3 in this specification is a transcription of FIG. 11 of Patent Document 2. However, the thermistor 5 was additionally written in a two-dot chain line following FIG.
Similarly, Patent Document 2 can appropriately detect the temperature of the pan placed in a predetermined position by the combination of the thermistor 5 and the reed switch 37. In the technique disclosed in Patent Document 2, the thermistor 5 is provided at the head of the cylinder 17, but the reed switch 37 is disposed on the proximal end side of the lead wire 30 of the thermistor 5, and leads according to the downward movement of the lead wire 30. A configuration is adopted in which the switch 37 is moved so that the resistance value of the thermistor 5 can be detected.

  Both of these Patent Documents 1 and 2 are techniques relating to the state in which the temperature detection thermistor is operating normally, and there is no particular description regarding failure detection when the thermistor has an open failure or a short-circuit failure.

Japanese Utility Model Publication No. 05-060415 JP 2006-34783 A

4A and 4B of the present specification schematically show the functional configuration of the temperature detection device disclosed in Patent Document 1. FIG. FIG. 4A is a drawing showing a state of “when there is a pan” in which the pan 1 is placed at a predetermined position, and FIG. 4B is “when there is no pan” where the pan 1 is not placed. It is drawing which shows this state.
Comparing these figures, when “with pan” is compared with “without pan”, the moving support 2 is lowered against the biasing force of the biasing means 3, and the reed switch 4 is It can be seen that the circuit is closed and the resistance value of the thermistor 5 is in a state that can be detected by the resistance value detecting means 10a.

Hereinafter, the above-described thermistor failure detection technique which is a problem of the present application will be described.
As indicated earlier, thermistor failures include "open failure" and "short-circuit failure", but with the current technology, each failure occurs when "with pan" and "without pan". The situation will be as follows. For this situation, FIG. 4 shows only detectable information.

"When there is a pot"
Thermistor is open failure The resistance value detected by the resistance value detection means is infinite, the same as the resistance value when there is no pan, and cannot be detected.
The thermistor is short-circuited. The resistance value detected by the resistance value detecting means becomes 0 and can be detected.

When the resistance value detected by the resistance value detection means includes the resistance value RSΩ of the original thermistor and is within a certain range close to the normal resistance value RSΩ, the thermistor is normal and “there is a pan” Determined.

"When there is no pan"
Thermistor is open failure The resistance value detected by the resistance value detection means is infinite, the same as the resistance value when there is no pan, and cannot be detected.
Thermistor is short-circuited. The resistance value detected by the resistance value detection means is infinite, the same as the resistance value when there is no pan, and cannot be detected.

  As described above, in the configuration in which the resistance detection element is used as the temperature detection element that detects the temperature based on the resistance value, for example, by adopting a thermistor or the like, the price of the temperature detection device can be suppressed, but failure detection ( In particular, open failures are not possible.

  The present invention has been made paying attention to such a point, and its purpose is to detect the presence / absence of the object to be heated and to detect the temperature of the object to be heated in the loaded state. An object of the present invention is to obtain a temperature detection device capable of detecting even an open failure of a resistance detection element in a temperature detection device having a temperature detection function.

In order to achieve this object, the first characteristic configuration of the temperature detecting device for a heating cooker according to the present invention is:
It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. A back surface of the contact body is provided with a resistance detection element, and includes a resistance value detection means for detecting the resistance detection element and a resistance value of the resistance detection element, and the moving side support is located at a lower position. In a state, a temperature detection device for a heating cooker provided with a heated object detection means for closing a circuit between the resistance detection element and the resistance value detection means in series with the resistance detection element,
An auxiliary resistor for failure detection is provided in parallel with the resistance detection element on the resistance detection element side with respect to the heated object detection means between the resistance detection element and the resistance value detection means. .

  The temperature detection device for a cooking device according to the present application includes a resistance detection element, a heated object detection means and a resistance value detection means connected in series with the resistance detection element provided in the conventional device, and an auxiliary resistor for failure detection. Is provided. This auxiliary resistance is provided in parallel with the resistance detection element on the resistance detection element side with respect to the object to be heated detection means. As a result, if the description is made following the description format of the detection form of the prior art, the following works.

"When there is a pot"
Resistance detection element is open failure The resistance value detected by the resistance value detection means becomes the resistance value RHΩ of the auxiliary resistance, and can be detected.
Resistance detection element short-circuit failure
The resistance value detected by the resistance value detecting means becomes 0 and can be detected.

If the resistance value detected by the resistance value detection means includes a normal resistance value (RS × RH) / (RS + RH) and is within a certain range close to the normal resistance value, the resistance detection element is normal. It can be determined that there is a pan. Here, the resistance value of the resistance detection element is RS.

"When there is no pan"
Resistance detection element is open failure The resistance value detected by the resistance value detection means is infinite and cannot be detected.
The resistance detection element is short-circuited. The resistance value detected by the resistance value detection means becomes infinite and cannot be detected.

  Therefore, when “without pan” cannot be detected as in the conventional case, both “open failure” and “short-circuit failure” are detected based on the combined resistance detected by the resistance value detection means when “with pan”. And can be detected as a finite value.

In the temperature detection device for the cooking device of the first characteristic configuration,
The point that the resistance value of the auxiliary resistor is 10 times or more larger than the resistance value of the resistance detection element when the resistance value is expressed in ohms at room temperature is the second point of the temperature detection device for the heating cooker of the present application. It is a feature configuration.

  In this way, by making the resistance value of the auxiliary resistor sufficiently larger than the resistance value of the resistance detection element, the combined resistance value detected by the resistance value detection means is practically a value close to the resistance value of the resistance detection element. Therefore, the temperature can be obtained from the detected combined resistance value using an index approximate to the resistance value-temperature conversion index that has been used when the conventional auxiliary resistor is not used.

  As a usage method of the temperature detection apparatus for a heating cooker which has been described so far, the following usage forms can be used.

(1) In using the temperature detection device for a heating cooker having the first or second characteristic configuration of the present application,
The resistance value detected by the resistance value detection means includes a normal resistance value (RS × RH) / (RS + RH), where RH is the resistance value of the auxiliary resistor and RS is the resistance value of the resistance detection element, and the normal value When it is within a certain range close to the resistance value, it is determined that the temperature of the object to be heated can be detected by the resistance value.

In the temperature detection device for a cooking device according to the present application, the combined resistance of the resistance detection element and the auxiliary resistance arranged in parallel is detected by the resistance value detection means. Then, the combined resistance value is combined resistance (RS × RH) / (RS + RH) in a state where the resistance detection element is working normally.
Therefore, when the resistance detected by the resistance value detection means includes a normal resistance value (RS × RH) / (RS + RH) and is within a certain range close to the normal resistance value, the resistance value detected It can be determined that the temperature of the object to be heated can be detected. Here, the fixed range can be set to 1260 kΩ to 1.8 kΩ, where the resistance value of the auxiliary resistor is about 5000 kΩ and the resistance value of the resistance detection element is about 400 kΩ.

  An apparatus for carrying out this method obtains a resistance value output from the resistance value detecting means described so far, and the resistance value includes a normal resistance value (RS × RH) / (RS + RH), and the normal resistance value is obtained. What is necessary is just to provide the determination means which determines with the said resistance value that the temperature of a to-be-heated object is detectable when it exists in the near fixed range.

In using the temperature detection device for a heating cooker having the first or second characteristic configuration of the present application,
When the resistance value detected by the resistance value detection means includes the resistance value of the auxiliary resistor for failure detection and is within a predetermined value or more, there is a possibility that the resistance detection element has an open failure. And
When the resistance value detected by the resistance value detecting means includes 0 and falls within a predetermined value or less, it is determined that there is a possibility that the resistance detection element has a short circuit failure.

In the temperature detection device for a cooking device according to the present application, the combined resistance of the resistance detection element and the auxiliary resistance arranged in parallel is detected by the resistance value detection means.
The combined resistance value becomes the combined resistance RH when the resistance detection element has an open failure.
Therefore, when the resistance detected by the resistance value detection means includes the resistance value RH of the auxiliary resistor for failure detection and is within a predetermined value or more, it is determined that the resistance detection element is in an open failure state. be able to. Here, the predetermined value may be a resistance value (2200 kΩ) lower by about 1800 kΩ than the resistance value of the auxiliary resistance, with the resistance value of the auxiliary resistance being about 5000 kΩ and the resistance value of the resistance detecting element being about 400 kΩ.

On the other hand, the combined resistance value is 0 when the resistance detection element has a short circuit failure.
Therefore, when the resistance detected by the resistance value detection means is within a predetermined value including 0, it can be determined that there is a possibility that the resistance detection element has a short circuit failure. Here, the predetermined value can be about 10 Ω, where the resistance value of the auxiliary resistor is about 5000 kΩ and the resistance value of the resistance detection element is about 400 kΩ.

  As an apparatus configuration for carrying out this method, a resistance value output is obtained from the resistance value detecting means described so far, and the resistance value includes a resistance value of the auxiliary resistor for failure detection and is in a range not less than a predetermined value. If the resistance value detected by the resistance value detecting means includes 0 and falls within a predetermined value or less, it is determined that there is a possibility that the resistance detection element has an open failure. What is necessary is just to provide the determination means which determines that there exists a possibility that the said resistance detection element is a short circuit failure.

And it pushes down as the stationary side support body standingly fixed by the heating cooker used for this method and the bottom part of the to-be-heated object mounted in the mounting part of the said heating cooker contact | abut The movable side support body supported by the upper end part of the fixed side support body in a state where it can be moved up and down and returned to the upper side, and the heated object of the movable side support body abut on each other. Is provided with a resistance detection element on the back surface of the contact body,
In the state where the moving support is located at the lower position, the heated object detection means for closing the circuit between the resistance detection element and the resistance value detection means for detecting the resistance value of the resistance detection element, The characteristic configuration of the temperature detector for the cooking device provided in series with the detection element is:
Between the resistance detection element and the resistance value detection means, an auxiliary resistor for failure detection is provided in parallel with the resistance detection element on the resistance detection element side with respect to the object detection means. .

The schematic diagram which shows schematic structure of the temperature detection apparatus for heating cookers which concerns on this invention The figure which shows schematic structure of the temperature detection apparatus disclosed by patent document 1 The figure which shows schematic structure of the temperature detection apparatus disclosed by patent document 2 Schematic diagram showing the schematic configuration of a temperature detection device according to the prior art

Embodiments of the present application will be described below with reference to the drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of a temperature detection apparatus 100 corresponding to FIG. 4 described above.
The figure schematically shows the structure in the vicinity of the heating section of the heating cooker, and FIG. 1 (a) shows an example of a pot 1 (a cooking container that is an object to be heated) to be heated by the heating cooker. ) Is shown, and FIG. 1B shows a state in which the moving support 2 is moved upward by the urging means 3 without the pan 1 being placed.

  An annular heater, which is a heating means 6 for heating the pan 1 (an example of an object to be heated) placed above, is provided on the periphery of the temperature detection device 100 according to the present application. In the mounted state, the bottom surface of the pan 1 is in contact with the upper surface of the heater, and is in contact with the head of the moving side support 2 of the temperature detection device 100 so that the moving side support 2 is moved downward. ing.

  As shown in FIG. 1, the temperature detection apparatus 100 is provided with a movable side support body 2 provided with a contact body 8 provided with a thermistor 5 on a fixed side support body 7 whose position in the vertical direction is fixed so as to be movable up and down. In addition, a biasing means 3 for biasing the abutting body 8 upward is provided, and the abutting body 8 that abuts on the object to be heated 1 is moved in the vertically movable range of the movable support 2. Following the vertical movement of the article 1 to be heated, it is configured to move up and down and always contact the bottom surface of the article 1 to be heated.

  Further, as can be seen from FIG. 1, the fixed side support 7 is provided with the thermistor 5 and resistance value detecting means 10 a for detecting the resistance value of the thermistor 5, and the lower side position of the moving side support 2 is lowered. A reed switch 4 that closes the circuit between the thermistor 5 and the resistance value detecting means 10a in a state where the moving or moving support 2 is located at the lower position is provided in series with the thermistor 5. . That is, the reed switch 4 is arranged in series between one terminal of the thermistor 5 and one terminal of the resistance value detecting means 10a. An auxiliary resistor 9 for detecting a failure is provided in parallel with the thermistor 5 on the thermistor 5 side with respect to the reed switch 4. When the magnet 7a is provided at a predetermined position of the fixed support 7 and the reed switch 4 is positioned at the lowered position in the configuration of FIG. 1, the reed switch 4 is closed to the circuit in response to the magnet 7a. The combined resistance R of the thermistor 5 and the auxiliary resistor 9 can be detected by the resistance value detecting means 10a.

In FIG. 1, the thermistor 5 and the reed switch 4 are drawn close to each other, but the thermistor 5 is directly below the contact body 8 (a position behind the contact body 8 with respect to the bottom of the object to be heated). However, as shown in FIG. 1 of Patent Document 2, the reed switch 4 may be provided at a lower position considerably away from the contact body 8 so that it can be lowered and raised. As shown in Fig. 11 of Fig. 2, it may be provided so as to be movable in the horizontal direction at a position shifted in the horizontal direction from below.
The moving side support 2 may include a cylindrical body that moves integrally with the contact body as shown in Patent Document 1 or a lead wire of the thermistor 5 as shown in Patent Document 2.

  The electrical characteristics of each element constituting the temperature detection device are as follows.

  Therefore, the resistance value of the thermistor 5: about 400 kΩ at room temperature

  Resistance value RH of auxiliary resistor 9: 5000 kΩ at room temperature

  Therefore, in this example, the resistance value RH of the auxiliary resistor 9 is set to be 10 times or more larger than the resistance value RS of the thermistor 5 when the resistance value is expressed in ohms at room temperature. That is, (RH = 5000 kΩ / RS = 400 kΩ)> 10.

Further, as can be seen from FIG. 1, the control unit 10 of the temperature detection apparatus 100 according to the present application is provided with a resistance value detection means 10a, a determination means 10b, and a temperature calculation means 10c. The determination means 10b is configured to perform "determination with pan" that is determination of presence / absence of a pan and "failure determination" that is determination of a failure factor.
And it is set as the structure by which the heating control means 11 issues the heating command with respect to the heating means 6 according to the temperature calculated by the temperature calculating means 10c in the state with a pan.

Hereinafter, these means will be described.
Resistance value detection means 10a
This means 10a obtains the combined resistance R of the thermistor 5 and the auxiliary resistor 9 connected in parallel from the relationship between the voltage and current applied to the detection circuit.

Determination means 10b
This means 10 performs “determination with pan” and “determination with failure”. In “determination with pan”, the combined resistance value R, which is the resistance value detected by the resistance value detection means 10a, is normal resistance. When it is within a certain range close to the normal resistance value including the value (RS × RH) / (RS + RH), it is determined as a normal state in which the temperature of the object to be heated can be detected by the combined resistance value.
Here, the fixed range is 1260 kΩ to 1.8 kΩ, where the resistance value RH of the auxiliary resistor is about 5000 kΩ and the resistance value RS of the thermistor at room temperature is about 400 kΩ.

  On the other hand, in the “failure determination”, when the combined resistance value R detected by the resistance value detecting means 10a includes the resistance value RH of the auxiliary resistor 9 for failure detection and is within a predetermined value range, It is determined that the thermistor 5 may have an open failure. Specifically, when the combined resistance value R is 2200 kΩ or more, it is determined that the thermistor 5 may have an open failure.

  Further, when the resistance value detected by the resistance value detecting means 10a includes 0 and is within a predetermined value or less, it is determined that there is a possibility that the resistance detection element has a short circuit failure. Specifically, when the combined resistance R is 10Ω or less, it is determined that there is a possibility that the resistance detection element has a short circuit failure.

Temperature calculation means 10c
The temperature calculation means 10c stores conversion information between the combined resistance value R detected by the resistance value detecting means 10a and the temperature, and the temperature is obtained from the detected combined resistance value R.
Basically, in the case of this example, the conversion information has a resistance value RH of the auxiliary resistor 9 that differs from the resistance value RS of the thermistor 5 by 10 times or more on the order of Ω, so that it is almost the same as the conversion index used conventionally. It is an equivalent indicator.

Heating control means 11
When there is a pan, temperature information is input to the heating control unit 11 from the temperature calculation unit 10c, and when there is no pan, information about the pan is input from the determination unit 10b.
Therefore, when there is a pan and a predetermined cooking command is received, a heating command is generated based on the temperature information and sent to the heating means 6. When there is no pan, it waits until it receives information on the presence of pan and further receives cooking information.

  With the above configuration, the temperature detection device 100 having a pan detection function for detecting the presence / absence of a pan and a temperature detection function for detecting the temperature of the pan in the mounted state also detects an open failure of the resistance detection element. It was possible to provide a temperature detecting device capable of performing the above.

[Another embodiment]

Hereinafter, other embodiments will be listed.
(1) In the above embodiment, the temperature detection device for a heating cooker according to the present invention has an arbitrary configuration in which an object to be heated is placed on a heating means and heated, such as a gas drop-in stove, an electric stove, and a rice cooker. It can be applied to other cooking devices.
(2) In the above-described embodiment, a so-called thermistor is disposed below the contact body and used for temperature detection of the object to be heated. However, any element can be used as long as its resistance value changes according to the temperature. A resistance detection element can be employed.
(3) In the above embodiment, a reed switch is arranged between the thermistor and the resistance value detecting means, and this reed switch is arranged at a predetermined position of the fixed side support body as the abutting body descends and is sensitive to the magnet. Thus, a configuration is shown in which the circuit is closed (electrically connected) between the thermistor and the resistance value detecting means.
As described above, the following configuration can be adopted for the configuration in which the resistance value of the thermistor can be detected by the resistance value detecting means.
(a) A fixed distance is provided between the reed switch and the magnet, and the reed switch is arranged on the fixed support, and the reed switch is opened with only the reed switch and the magnet. Then, the movable support and the magnetic shield of a certain length are configured so as to be able to enter between the reed switch and the magnet, and as the abutment (movable support) moves to the lowered position, the magnetic It is also possible that the shield enters between the two and the reed switch is closed.
b. The reed switch is opened with the reed switch and the magnet arranged on the stationary support, and the magnetic shield that moves integrally with the movable support is inserted between the reed switch and the magnet. As the contact body (moving side support body) moves to the lowered position, the magnetic shield can be separated from the both, and the reed switch can be closed.

1 Pot (to be heated)
2 Moving side support 3 Biasing means 4 Reed switch (object to be heated detection means)
5 Thermistor (resistance detection element)
6 Heater (heating means)
7 Fixed side support 7a Magnet (object to be heated detection means)
8 Contact body 9 Auxiliary resistor 10 for failure detection Control unit 10a Resistance value detection means 10b Determination means 100 Temperature detection device

Claims (5)

It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. It is configured with a resistance detection element on the back surface of the contact body,
A resistance value detecting means for detecting a resistance value of the resistance detecting element is provided, and a circuit between the resistance detecting element and the resistance value detecting means is closed in a state where the moving support is located at a lower position. A temperature detection device for a heating cooker provided with an object to be heated detection means in series with the resistance detection element,
For a cooking device in which an auxiliary resistor for failure detection is provided in parallel with the resistance detection element on the resistance detection element side with respect to the heated object detection means between the resistance detection element and the resistance value detection means Temperature detection device.   The temperature detection device for a heating cooker according to claim 1, wherein the resistance value of the auxiliary resistor is 10 times or more larger than the resistance value of the resistance detection element as an ohmic display resistance value at room temperature. In the temperature detection apparatus for the heating cooker according to claim 1 or 2,
The resistance value of the auxiliary resistor is RH, the resistance value of the resistance detection element is RS, and the combined resistance value detected by the resistance value detection means includes a normal resistance value (RS × RH) / (RS + RH), and the normal value When it is within a certain range close to the resistance value,
The object to be heated is placed on the contact body;
A method of using a temperature detection device for a cooking device that determines that the temperature of an object to be heated is detectable based on the combined resistance value. In the temperature detection apparatus for the heating cooker according to claim 1 or 2,
When the resistance value detected by the resistance value detection means includes the resistance value RH of the auxiliary resistor for failure detection and is within a predetermined value or more, there is a possibility that the resistance detection element has an open failure. Judge that there is,
Temperature detection for a heating cooker that determines that the resistance detection element may have a short-circuit fault when the resistance value detected by the resistance value detection means includes 0 and is within a predetermined value or less. How to use the device. It can be raised and lowered so that it is pushed down as the fixed side support that is fixedly mounted on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device come into contact with each other. In addition, a moving side support that is supported by the upper end of the fixed side support in a state where the upper side of the fixed side support is biased upward, and a contact body is provided at a position where the heated object of the moving side support contacts. It is configured with a resistance detection element on the back surface of the contact body,
In a state where the movable support is located at the lower position, a heated object detection means for closing a circuit between the resistance detection means for detecting the resistance value of the resistance detection element is connected in series to the resistance detection element. A temperature detector for a heating cooker provided,
For a cooking device in which an auxiliary resistor for failure detection is provided in parallel with the resistance detection element on the resistance detection element side with respect to the heated object detection means between the resistance detection element and the resistance value detection means Temperature detector.

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