JP2018085224A - Temperature detection device and heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detection device and a heating cooker capable of detecting temperatures of containers having various shapes with high accuracy.SOLUTION: A temperature detection device 30 includes a mounting part having a first surface 301 on which an object to be heated is placed and a second surface 302 in contact with a top plate, a first temperature sensor 34 that is disposed in the mounting part and detects the temperature on the first surface, a second temperature sensor 35 that is disposed in the mounting part and detects the temperature on the second surface, and a first communication unit 33 that transmits the detected temperatures of the first and second temperature sensors and the detected temperature of the first temperature sensor, which is corrected by using the detected temperature of the second temperature sensor.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a temperature detection device that detects the temperature of a container in which an object to be heated is stored, and a cooking device that performs a cooperative operation with the temperature detection device.

  In a conventional cooking device, it is known to detect the temperature of a container such as a pot in which ingredients are stored and to automatically perform heating control based on the detected temperature. For example, the heating cooker described in Patent Document 1 includes an infrared sensor on the lower surface of the top plate, detects infrared rays radiated from the bottom of the pan, calculates the pan bottom temperature, and performs heating control. . Moreover, in patent document 2 and patent document 3, a temperature sensor is arrange | positioned in the height direction of the inside of a pan bottom or the side surface of a pan, and the detected temperature information is transmitted to a heating cooker, and a heating control is performed. Is described. Further, Patent Document 4 includes a pan bottom portion and a handle attached to the pan body, and a temperature sensor is arranged on the pan bottom portion, and temperature information detected by the temperature sensor is transmitted via a communication circuit provided on the handle. The structure to be described is described. Patent Document 5 discloses a configuration including a detachable temperature detection plate on a mounting table on which a pan is mounted.

JP 2003-249341 A (refer to claim 1) JP 2007-53038 A (see FIG. 1) Japanese Patent No. 4936814 (see FIG. 1) JP 2012-514495 A (see FIG. 12) Japanese Patent No. 25322567 (see FIG. 1)

  In the case of the configuration described in Patent Document 1, a part of infrared rays emitted from the bottom of the pan is shielded (absorbed and reflected) by the top plate, and the emissivity of infrared rays is increased by the material and surface treatment of the bottom of the container. It is difficult to detect an accurate temperature due to factors such as differences.

  Further, in the case of the configurations described in Patent Document 2 and Patent Document 3, since the influence on the temperature detection by the top plate is eliminated, the followability and accuracy of temperature detection can be improved. However, only specific pans with temperature sensors inside can be used. Furthermore, in the case of the configuration described in Patent Document 4, since it is necessary to attach the pan bottom and the handle, the shape of the pan is limited, and the pan cannot be adapted to any shape. In addition, by providing parts such as a temperature sensor or a communication circuit on the pan or the handle, the pan is increased in size and weight, and usability and cleanability are deteriorated.

  In addition, as in Patent Document 5, a detachable temperature detection plate is placed on a mounting table, and a pan is placed on the temperature detection plate to detect temperature, thereby using various shapes of pans. Can do. However, it is necessary to connect the temperature detection plate and the mounting table by wire, which is poor in cleanability and usability. In addition, in the induction heating cooker, since the pan is induction-heated by the magnetic flux generated by the heating coil, there is a difference between the temperature at the bottom of the pan and the temperature at the top surface of the mounting table. Therefore, the detection result by the temperature detection plate of Patent Document 5 is affected by both the temperature of the upper surface of the mounting table and the temperature of the pan bottom, and it is difficult to detect only the temperature of the pan bottom with high accuracy.

  The present invention has been made in the background of the above problems, and an object thereof is to provide a temperature detection device and a heating cooker that can detect the temperature of containers of various shapes with high accuracy.

  The temperature detection device according to the present invention is disposed in the mounting unit, the mounting unit having a first surface on which an object to be heated is mounted, and a second surface in contact with the top plate. A first temperature sensor for detecting temperature; a second temperature sensor for detecting a temperature on the second surface; and a temperature detected by the first temperature sensor and the second temperature sensor, or a second temperature sensor. A first communication unit that transmits the detected temperature of the first temperature sensor corrected using the detected temperature.

  According to the temperature detection device of the present invention, by arranging the first temperature sensor on the first surface on which the object to be heated is placed, the degree of contact with the object to be heated can be improved, and various shapes can be obtained. The temperature of the container can be detected with higher accuracy. Moreover, the 2nd temperature sensor is provided in the 2nd surface which contacts a top plate, and the correction which reduces the influence by the said temperature can be performed by detecting the temperature of a top plate. Thereby, the temperature of a to-be-heated object can be calculated | required with higher precision.

3 is a perspective view of a heating cooker according to Embodiment 1. FIG. It is a figure explaining the structure and function of the principal part of the heating cooker in Embodiment 1. FIG. (A) is a figure explaining the operation display part in Embodiment 1, (b) is a figure explaining the thermal power display part in Embodiment 1. FIG. 1 is a perspective view of a temperature detection device in Embodiment 1. FIG. 2 is a plan view of the temperature detection device in Embodiment 1. FIG. FIG. 3 is a diagram illustrating an internal configuration of a temperature detection device in the first embodiment. It is a graph which shows the relationship between the distance from a top plate to the bottom part of a container, and heating efficiency. 6 is a plan view of a temperature detection device according to Embodiment 2. FIG. It is a figure explaining the internal structure of the temperature detection apparatus in Embodiment 2. FIG. 6 is a schematic cross-sectional view of a temperature detection device in Embodiment 3. FIG. FIG. 10 is a schematic cross-sectional view of a temperature detection device in Modification 1 of Embodiment 3. FIG. 10 is a schematic cross-sectional view of a temperature detection device in Modification 2 of Embodiment 3. 6 is a schematic cross-sectional view of a temperature detection device in Embodiment 4. FIG. FIG. 10 is a schematic cross-sectional view of a temperature detection device in a fifth embodiment. FIG. 10 is a plan view of a temperature detection device in a sixth embodiment. FIG. 10 is a plan view of a temperature detection device in a modification of the sixth embodiment.

  Hereinafter, embodiments of a temperature detection device and a heating cooker according to the present invention will be described with reference to the drawings. Note that the detailed structure and overlapping or similar descriptions are appropriately simplified or omitted. In the following embodiments, an induction heating cooker will be described as an example of a heating cooker.

Embodiment 1 FIG.
(Configuration of cooking device)
FIG. 1 is a perspective view of a heating cooker 100 according to Embodiment 1 of the present invention. The heating cooker 100 includes a main body 1 and a top plate 2 that is disposed on the upper surface of the main body 1 and is formed of heat-resistant glass. A heated object such as a pan or a frying pan placed on the top plate 2. The container 10 is heated by a heating unit provided inside the main body 1. In the present embodiment, heating ports 6 are respectively provided at three locations on the left front side, the right front side, and the center back side of the top plate 2.

  The main body 1 accommodates a grill 9 for cooking food such as fish. A grill heater (not shown) serving as a heat source for heating the cooked food is provided inside the grill 9. Next to the grill 9, for example, a dial switch is used, and a front operation display unit 4 that accepts an input operation of a heating condition and a heating instruction, and a power source that is operated to turn on / off the heating cooker 100. A switch 4a is arranged.

  On the front side of the top plate 2, an operation display unit 3 that receives an input operation of a heating condition and a heating instruction and displays a heating state is arranged. The operation display unit 3 includes, for example, a capacitance switch and a liquid crystal panel. Further, a thermal power display unit 5 is provided on the front side of each heating port 6.

  When the user places the container 10 containing the cooked food on the top plate 2 and operates the operation display unit 3 or the front operation display unit 4 to set the heating conditions and the like, according to the set contents, The container 10 is heated by the heating unit. Information related to settings such as the progress of heating or cooking mode is displayed on the operation display unit 3, and the heating power is displayed on the heating power display unit 5 arranged corresponding to each heating port 6.

  Further, a portion of the top plate 2 corresponding to each heating port 6 is provided with, for example, a circular display indicating a place where the container 10 is placed by printing or the like. Can be understood.

  A heating coil 14 is provided below the heating port 6 in the main body 1. The heating coil 14 is a coil formed by winding a conductive wire such as a copper wire or an aluminum wire, for example, and the heating coil 14 corresponds to the “heating unit” of the present invention. In addition, in FIG. 1, arrangement | positioning of the heating coil 14 is illustrated with the substantially circular broken line. An eddy current is generated in the container 10 placed on the top plate 2 by flowing a high-frequency current through the heating coil 14 by a high-frequency inverter 24 (FIG. 2), which will be described later, and the container is caused by the generated eddy current and the resistance of the container 10. 10 generates heat. Thereby, cooking with good heating efficiency for directly heating the container 10 can be realized. In addition, you may provide other heating parts, such as an electric heater, as a heating part of the heating port 6 of the heating cooker 100. FIG.

  Further, an exhaust port 7 is provided on the back side of the top plate 2. The exhaust port 7 is disposed so as to communicate with the inside of the main body 1. The air taken into the main body 1 is exhausted from the exhaust port 7. An air-permeable cover (not shown) that prevents dust and other foreign matter from entering the inside of the main body 1 may be provided at the upper portion of the exhaust port 7.

  In addition, a communication port 8 for performing wireless communication between a temperature detection device 30 (to be described later) and the heating cooker 100 is provided in front of the exhaust port 7. The communication port 8 is made of a material having high radio wave transparency such as glass fiber reinforced plastic (GFRP) resin. In FIG. 1, the communication port 8 is disposed between the heating port 6 and the exhaust port 7 so that the radio wave is not shielded by the container 10 placed on the upper surface of the top plate 2. However, the position of the communication port 8 is not limited to this. For example, the communication port 8 may be arranged at a position where the distances to the heating ports 6 are equal. Alternatively, the communication port 8 may be provided as a part of the operation display unit 3.

  FIG. 2 is a diagram for explaining a configuration and functions of main parts of the heating cooker 100 according to the present embodiment. In FIG. 2, only a configuration corresponding to one heating port 6 is illustrated, and a container 10 in which a cooked product such as water or food is accommodated, and a temperature detection device 30 that detects the temperature of the container 10. Are also shown. The temperature detection device 30 is provided separately from the heating cooker 100, detects the temperature of the bottom of the container 10, and transmits information on the detected temperature to the heating cooker 100. Details of the temperature detection device 30 will be described later.

  As shown in FIG. 2, a heating coil 14 is disposed below the heating port 6 provided in the top plate 2. In the present embodiment, the heating coil 14 has a double ring shape including a substantially annular inner heating coil 14a and a substantially annular outer heating coil 14b provided outside thereof.

  Inside the main body 1, there are a device-side communication unit 21 that communicates with the temperature detection device 30, a high-frequency inverter 24 that supplies a high-frequency current to the heating coil 14, a drive unit 23 that drives the high-frequency inverter 24, and a drive unit 23. A device-side control unit 22 to be controlled is arranged. The device-side control unit 22 transmits a high-frequency power command (thermal power information) to the drive unit 23 based on the setting content by the operation display unit 3 and the temperature information from the temperature detection device 30. The device-side control unit 22 is configured by using hardware such as a circuit device that realizes the function, or is configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon. The drive unit 23 controls the high-frequency inverter 24 based on a command from the device-side control unit 22 and adjusts the high-frequency current flowing through the heating coil 14. Thereby, heating control of the container 10 is performed. In addition, the device-side control unit 22 generates a signal for confirming the state of the temperature detection device 30, and transmits the signal from the device-side communication unit 21 to the temperature detection device 30 via the communication port 8.

  In addition, an infrared temperature sensor 27 is disposed below the top plate 2 of the heating cooker 100. The infrared temperature sensor 27 detects infrared rays emitted from the bottom of the container 10 placed on the top plate 2 on the heating coil 14. Note that it is desirable that the portion directly above the infrared temperature sensor 27 has a structure that does not shield infrared rays (for example, a cavity or a transmission material). A signal detected by the infrared temperature sensor 27 is output to the infrared temperature detection unit 270. The infrared temperature detector 270 converts the detection signal from the infrared temperature sensor 27 into a temperature. The temperature information converted by the infrared temperature detection unit 270 is output to the device-side control unit 22.

  Further, a contact-type temperature sensor 28 such as a thermistor is arranged on the back surface of the top plate 2 of the heating cooker 100 facing the heating coil 14 so as to contact the back surface of the top plate 2. The contact temperature sensor 28 detects heat transmitted from the container 10 to the top plate 2. The signal detected by the contact temperature sensor 28 is output to the contact temperature detector 280. The contact-type temperature detection unit 280 converts a detection signal from the contact-type temperature sensor 28 into a temperature. The temperature information converted by the contact temperature detector 280 is output to the device-side controller 22.

  The device-side communication unit 21 corresponds to the “second communication unit” in the present invention. The device-side control unit 22 corresponds to a “second control unit” in the present invention.

  Next, the configuration of the operation display unit 3 and the thermal power display unit 5 of the cooking device 100 will be described. FIG. 3A is a diagram for explaining the operation display unit 3 in the present embodiment, and FIG. 3B is a diagram for explaining the thermal power display unit 5 in the present embodiment. As shown to Fig.3 (a), the operation display part 3 is for setting the status display part 3a which shows the operation condition of each heating port 6, the automatic menu key 3b for setting an automatic cooking menu, and setting a thermal power. The heating power setting key 3c and the timer setting key 3d for setting the heating time are provided.

  The status display unit 3 a has a display corresponding to each heating port 6, and the display mode is switched according to the operating state of each heating port 6. The display of the status display unit 3a can indicate to the user which heating port 6 is operating. The automatic menu key 3b includes a “boiled” key, a “noodle boiled” key, a “boiled water” key, a “baked food” key, a “fried food” key, and a “temperature” setting key. When these keys are pressed, the device-side control unit 22 performs heating control according to a control sequence preset for each menu and stored in a storage unit (not shown).

  The thermal power setting key 3c includes a “low” fire key, a “medium” fire key, and a “strong” fire key, and the user can set any of the three levels of thermal power using these keys. It has become. By providing keys individually according to the thermal power, the user can input the necessary thermal power settings with a single operation. Further, regarding the fine thermal power adjustment, adjustment is made by using a horizontal triangular thermal power adjustment key provided on the “weak”, “medium”, and “strong” keys. Alternatively, the heating power may be adjusted using a dial switch of the front operation display unit 4.

  The timer setting key 3d includes a timer setting part and a timer display part. The user sets the heating time by operating the timer setting part, and the set time is displayed on the timer display part. The display changes over time. The device-side control unit 22 performs heating control according to the time set by the timer setting key 3d.

  As shown in FIG. 3B, the thermal power display unit 5 includes a thermal power display 5a and a communication status display 5b. The thermal power display unit 5 is provided corresponding to each of the heating ports 6 provided on the left side, the right side, and the center of the heating cooker 100, and any thermal power display unit 5 has the same configuration. The thermal power display 5a displays thermal power in a plurality of stages, and the display mode is switched according to the thermal power. The thermal power display 5a has, for example, a plurality of LEDs, and expresses thermal power by switching the lighting states (lighting, extinguishing, blinking, etc.) of these LEDs or switching the lighting color. As a result, the user can be notified of the thermal power that is easy to understand intuitively. The communication status display 5b indicates the communication status with the temperature detecting device 30. Thereby, it can be confirmed whether the temperature detection apparatus 30 which the user is using with the heating port 6 and the heating port 6 respond | correspond.

  In the present embodiment, the case where one operation display unit 3 is provided at the front center of the top plate 2 has been described. However, the operation display unit 3 and the thermal power display unit 5 are configured integrally, and each heating port 6 is configured. It may be provided so as to correspond to each. Further, the type and arrangement of the setting keys of the operation display unit 3 are not limited to FIG. For example, the thermal power setting key 3c includes a “weak” fire key, a “medium” fire key, a “strong” fire key, and a “3 kW” key, and these keys are used to set any of four levels of thermal power. It is good also as a structure which can do. Further, although not shown in FIG. 3, for example, a display unit configured by a liquid crystal screen or the like for displaying information on the thermal power or progress status such as “during preheating” or “appropriate temperature reached”, contents of the set menu, etc. May be provided separately.

(Configuration of temperature detector)
Next, the structure of the temperature detection apparatus 30 of this Embodiment is demonstrated. FIG. 4 is a perspective view of the temperature detection device 30 of the present embodiment, and FIG. 5 is a plan view of the temperature detection device 30. FIG. 6 is a diagram illustrating the internal configuration of the temperature detection device 30. As shown in FIG. 4 and FIG. 5, the temperature detection device 30 has a planar shape like a pan, and communicates with the placement unit 31 on which the container 10 is placed and the device-side communication unit 21. And a communication unit 33.

  The mounting portion 31 has a circular flat plate shape and is made of silicone rubber or the like having elasticity and heat resistance. Alternatively, the placement unit 31 may be made of a plastic having a high temperature and heat resistance such as a super engineering plastic, and further combining a silicone rubber having elasticity and a super engineering plastic having heat resistance and shape stability. It may be formed. A plurality of dome-shaped protrusions 311 are provided on the surface of the placement portion 31, that is, on the first surface 301 on which the container 10 is placed. The protruding portion 311 is formed integrally with the mounting portion 31 by projecting a part of the mounting portion 31 upward. As shown in FIG. 5, the plurality of protrusions 311 are arranged at equal intervals on the same circumference having a diameter D1. The diameter D1 of the circle in which the protrusion 311 is arranged is determined from the minimum diameter of the container 10 to be placed. Alternatively, the diameter D <b> 1 is determined based on the position where the highest temperature is generated in the heat generating part at the bottom of the container 10 due to the characteristics of the heating coil 14 when the temperature detection device 30 is disposed above the heating coil 14. For example, it is provided at a position of 40 mm (diameter D1 is 80 mm) from the center.

  In addition, as shown in FIG. 6, the first temperature sensor 34 is disposed inside each of the plurality of protrusions 311. The first temperature sensor 34 is a contact-type temperature sensor, and detects the temperature on the first surface 301, that is, the temperature of the bottom portion of the container 10 placed on the placement unit 31. The first temperature sensor 34 is constituted by, for example, a thermistor or a thermocouple. In the present embodiment, four protrusions 311 are formed, and the first temperature sensor 34 is disposed in each protrusion 311. Thus, the container 10 can be stably supported by setting the number of the protrusions 311 to three or more. In addition, by providing a plurality of first temperature sensors 34, temperature detection can be continued even when the container 10 is placed at an angle or when the internal wiring is disconnected or the like.

  When the container 10 is placed on the placement unit 31, the bottom of the container 10 comes into contact with the protrusion 311. By forming the protruding portion 311 with silicone rubber or the like having the same elasticity as that of the mounting portion 31, the adhesion between the bottom portion of the container 10 and the protruding portion 311 is increased, and the contact area is increased. Further, by providing the first temperature sensor 34 in the protrusion 311 that is in close contact with the bottom of the container 10, the first temperature sensor 34 can contact the bottom of the container 10 and detect the temperature of the container 10 with high accuracy. it can.

  Moreover, the thickness t of the mounting portion 31 shown in FIG. 6 is less than 5 mm in terms of the maximum thickness including the protruding portion 311. When the thickness t of the placing portion 31 is 5 mm, the container 10 placed on the temperature detection device 30 is separated from the top plate 2 of the heating cooker 100 by about 5 mm. Here, when the container 10 moves away from the heating coil 14, the magnetic flux interlinking with the container 10 attenuates in inverse proportion to the square of the distance. Therefore, it is generally considered that when the container 10 is separated from the heating coil 14, the heating efficiency is also lowered. However, in actuality, when the top plate 2 and the container 10 are in contact with each other, the heating efficiency may be reduced due to a part of the heat of the container 10 being taken away by the top plate 2.

  FIG. 7 is a graph showing the relationship between the distance from the top plate 2 to the bottom of the container 10 and the heating efficiency. In FIG. 7, an insulator is disposed between the top plate 2 and the container 10, and an air layer is formed between the top plate 2 and the container 10. And it is the result obtained from the experiment which changed the distance from the top plate 2 to the container 10 by changing the thickness of an insulator, and measured the heating efficiency of the boiling water in each distance. As shown in FIG. 7, the heating efficiency is higher when the distance from the top plate 2 to the container 10 is about 2 mm than when the distance from the top plate 2 to the container 10 is 0 mm. In the case of a mirror pan or the like having a low emissivity, the efficiency is increased by about 2%. Here, the thermal conductivity K of neo-ceram glass generally used for the top plate 2 is 1.6 W / m · K, and the thermal conductivity K of air is 0.0241 W / m · K. Therefore, the heat conduction is reduced and the heating efficiency is improved when the air layer is formed, compared with the case where the container 10 and the top plate 2 are in contact with each other.

  However, as shown in FIG. 7, when the distance from the top plate 2 to the container 10 is 5 mm or more, the heating efficiency is lower than when the distance from the top plate 2 to the container 10 is 0 mm. Therefore, by making the distance from the top plate 2 to the container 10 less than 5 mm, a heating efficiency substantially equal to or higher than the heating efficiency when the gap amount between the top plate 2 and the container 10 is 0 mm is realized. be able to. The thermal conductivity K of the silicone rubber used for the placement part 31 is 0.2 W / m · K, which is higher than the thermal conductivity of air, but the container 10 is placed on the protrusion 311. Thus, the contact area with the container 10 is limited, and heat conduction is suppressed.

  In addition, the height of the protrusion 311 is set to 1 to 2 mm in consideration of the warp of the bottom of the container 10. Specifically, some pans or frying pans used as the container 10 have the bottom bent upward (convex shape) in advance in consideration of deformation due to heating. For example, assuming that the maximum value of warpage at the center of the bottom of the container 10 is 3 mm, the warpage gradually decreases toward the outside in the radial direction of the container 10, and the position of the diameter 80 mm where the protrusion 311 is arranged ( That is, at a position having a radius of 40 mm from the center, the warp is about 1 to 2 mm. Therefore, by setting the protrusion 311 to be 1 to 2 mm or more, the protrusion 311 can be reliably brought into contact with the bottom of the container 10 even when the bottom of the container 10 is warped in advance.

  Returning to FIGS. 4 to 6, the first temperature sensor 34 is disposed in the protrusion 311 that contacts the bottom of the container 10, so that the temperature of the bottom of the container 10 that is a heat source can be accurately detected. . On the other hand, the mounting portion 31 formed of silicone rubber or the like is heated by heat conduction and radiant heat from the container 10. Moreover, since the 2nd surface 302 (FIG. 6) on the opposite side of the 1st surface 301 in which the container 10 of the mounting part 31 is mounted is in contact with the top plate 2, heat conduction from the top plate 2 is carried out. receive. Specifically, when the temperature of the top plate 2 is lower than the temperature of the temperature detection device 30, the placement unit 31 is heated by the top plate 2. In addition, when the temperature of the top plate 2 is higher than the temperature of the temperature detection device 30, the placement unit 31 is cooled by the top plate 2. Therefore, when the temperature difference between the top plate 2 and the container 10 is large at the start of cooking, the temperature detected by the first temperature sensor 34 may be different from the actual temperature at the bottom of the container 10.

  Therefore, as shown in FIG. 6, the temperature detection device 30 of the present embodiment has a second surface 302 in contact with the top plate 2 in addition to the first temperature sensor 34 disposed on the first surface 301. A second temperature sensor 35 that detects the temperature on the surface, that is, the temperature of the top plate 2 is provided. Similar to the first temperature sensor 34, the second temperature sensor 35 is a contact-type temperature sensor and detects the upper surface temperature of the top plate 2. The second temperature sensor 35 is composed of, for example, a thermistor or a thermocouple. The second temperature sensor 35 is disposed below the first temperature sensor 34 when the side on which the container 10 is placed is set upward. Further, the second temperature sensor 35 is disposed at a position overlapping the first temperature sensor 34 when the temperature detection device 30 is viewed in plan. The second temperature sensor 35 may be disposed below at least one first temperature sensor 34.

  The temperature information detected by the plurality of first temperature sensors 34 and the second temperature sensor 35 is output to the communication unit 33 through the lead wire 312. The communication unit 33 has a cylindrical outer shape, and is disposed outside the placement unit 31 in a plan view during use so as not to come into contact with the container 10 placed on the placement unit 31. That is, the communication unit 33 is disposed outside the heating coil 14 in a state where the temperature detection device 30 is disposed on the heating port 6.

  As illustrated in FIG. 6, the communication unit 33 includes a sensor side communication unit 331, a sensor side control unit 332, and a power supply unit 333. Each of the above parts is housed in a cylindrical housing 330 and sealed in a watertight state. The housing 330 has heat resistance and impact resistance and has a structure that does not shield radio waves. Specifically, the upper surface 330a of the housing 330 is formed of a material (for example, aluminum) having impact resistance and a magnetic shielding effect. The main body 330b of the housing 330 is formed of a material that does not shield radio waves, has high heat resistance and high friction coefficient (for example, PPS, PC, silicone rubber, ceramics, etc.), and has a surface coated with silicone rubber. Note that a material that transmits radio waves other than metal may be used for at least a part of the main body 330b. The housing 330 is provided with a power switch (not shown). By operating this power switch, the temperature detection device 30 is turned on or off. The communication unit 33 may use an electrical switch that turns on the power supply by communication with the cooking device 100.

  The sensor side communication unit 331 performs bidirectional information communication with the device side communication unit 21 arranged in the main body 1 of the cooking device 100 under the control of the sensor side control unit 332. Information communication between the sensor-side communication unit 331 and the device-side communication unit 21 is performed using, for example, a 2.4 GHz band wireless communication module. By using the wireless communication module, it is not necessary to provide a connector part outside the temperature detection device 30, and it is possible to prevent a circuit from being short-circuited due to water immersion inside the temperature detection device 30. In addition, since the wiring is not required, it is possible to prevent the wiring from being caught on the handle of the container 10, and for example, it becomes easy to use the heating port 6 on the back side of the center, and the usability is improved. In addition, information can be transmitted to a 2.4 GHz Wi-Fi (IEEE802.11 standard) module provided in the home, and has expandability with external wireless communication devices. The sensor side communication unit 331 corresponds to the “first communication unit” in the present invention. The sensor-side control unit 332 corresponds to the “first control unit” in the present invention.

  The frequency band is not limited to the 2.4 GHz band, and a specific low-power radio station communication module using a communication frequency of 900 MHz band or 300 to 500 MHz band or less may be used. For example, the frequency of the induction current in the induction heating cooker (IH cooking heater) uses a frequency in the 20 to 100 kHz band, and the frequency of the electromagnetic wave in the microwave oven uses a frequency in the 2.45 GHz band. For this reason, if it is a frequency of 900 MHz or a 300-500 MHz band, communication will become possible, without causing interference with other cooking appliances.

  In addition to the above, information communication may be performed using Bluetooth (registered trademark), RFID (Radio Frequency Identifier), NFC (Near Field Communication), or the like. However, when the RFID is used, the sensor-side communication unit 331 and the device-side communication unit 21 need to be positioned. The information communication between the sensor side communication unit 331 and the device side communication unit 21 is not limited to wireless communication, and may be wired communication using a cable.

  The sensor side control unit 332 controls each component of the temperature detection device 30. The sensor-side control unit 332 is configured by using hardware such as a circuit device that realizes the function, or is configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon. The sensor side controller 332 corrects the detected temperature of the first temperature sensor 34 using the detected temperature of the second temperature sensor 35. Specifically, when the detected temperature of the second temperature sensor 35 is lower than the detected temperature of the first temperature sensor 34, it corresponds to the difference between the detected temperature of the first temperature sensor 34 and the detected temperature of the second temperature sensor 35. Thus, the temperature detected by the first temperature sensor 34 is positively corrected. That is, when the temperature of the top plate 2 is lower than the temperature of the container 10, there is a possibility that the detected temperature of the first temperature sensor 34 is lower than the actual temperature of the container 10 due to the effect of the temperature of the top plate 2. Therefore, the detected temperature of the first temperature sensor 34 is positively corrected. On the other hand, when the detected temperature of the second temperature sensor 35 is higher than the detected temperature of the first temperature sensor 34, the first temperature sensor 34 and the second temperature sensor 35 detect the 1 The temperature detected by the temperature sensor 34 is negatively corrected. That is, when the temperature of the top plate 2 is higher than the temperature of the container 10, the detection temperature of the first temperature sensor 34 may be higher than the actual temperature of the container 10 due to the effect of the temperature of the top plate 2. As a result, the temperature detected by the first temperature sensor 34 is negatively corrected. Then, the corrected temperature is transmitted to the device side communication unit 21 via the sensor side communication unit 331.

  Note that the detected temperatures of the first temperature sensor 34 and the second temperature sensor 35 used at this time are the highest of the temperatures detected by the plurality of first temperature sensors 34 and detected by the plurality of second temperature sensors 35. The highest temperature among the measured temperatures. In another embodiment, an average value of temperatures detected by a plurality of first temperature sensors 34 and an average value of temperatures detected by a plurality of first temperature sensors 34 may be used.

  In addition, when the sensor-side control unit 332 receives a state confirmation signal from the device-side control unit 22, the sensor-side control unit 332 sends a signal indicating that the power supply is on to the device-side control unit 22 via the sensor-side communication unit 331. Send. The power supply unit 333 is a battery for supplying power to each component unit.

  Next, the arrangement of the lead wires 312 of the temperature detection device 30 in the present embodiment will be described. As shown in FIGS. 5 and 6, the plurality of first temperature sensors 34 and the second temperature sensors 35 of the present embodiment are connected to the communication unit 33 via lead wires 312 formed from copper wires or the like, respectively. The Here, as described above, for example, thermistors are used as the first temperature sensor 34 and the second temperature sensor 35. The thermistor is an element whose resistance value changes depending on the temperature of the temperature contact portion, and detects the temperature from a voltage value output by a voltage dividing circuit (not shown) provided in the communication portion 33. Further, the first temperature sensor 34 and the second temperature sensor 35 are coated with heat-resistant glass or the like in order to prevent connection with the lead wire 312 or deterioration of the thermistor element.

  The first temperature sensor 34, the second temperature sensor 35, and the lead wire 312 are disposed inside the placement portion 31 formed of silicone rubber and placed on the heating coil 14 of the heating cooker 100. And the signal detected by the 1st temperature sensor 34 and the 2nd temperature sensor 35 is converted in the sensor side control part 332 provided in the communication part 33, and the apparatus side communication of the heating cooker 100 from the sensor side communication part 331 is carried out. Is transmitted to the unit 21. Here, when the cooking device 100 is driven, a high frequency current of about 20 to 100 kHz is supplied to the heating coil 14 and a magnetic field is generated in a direction interlinking with the high frequency current. Thereby, an eddy current is generated in the container 10 made of metal or the like disposed immediately above the heating coil 14, and the container 10 is induction-heated by resistance heat generation due to the eddy current.

  At this time, the temperature detection device 30 is disposed between the bottom of the container 10 and the heating coil 14 while being exposed to a high-frequency magnetic field. Moreover, the electric power and frequency input to the heating coil 14 are variably controlled according to an automatic cooking menu or the like. Therefore, electromagnetic noise is superimposed on the lead wire 312 in the mounting portion 31 of the temperature detection device 30, and an error may occur in the detection results of the first temperature sensor 34 and the second temperature sensor 35.

  Therefore, in the present embodiment, the lead wires 312 are arranged so as to extend from the first temperature sensor 34 and the second temperature sensor 35 toward the outline of the placement portion 31 in a plan view during use. Accordingly, the lead wire 312 is arranged so as to intersect the winding direction R of the heating coil 14 in a state where the placement unit 31 is placed on the heating port 6. As a result, the area where the lead wire 312 is affected by the magnetic field is reduced, and the influence of electromagnetic noise is also reduced. Such a reduction in electromagnetic noise is also clarified from experimental results.

  Moreover, although not shown in figure, the lead wire 312 may be provided with a film, or may expose a metal part. However, since the placement portion 31 is formed of silicone rubber and has flexibility, the placement portion 31 is deformed when the temperature detection device 30 is used or carried, so that the lead wires 312 come into contact with each other and become conductive. Sometimes. Therefore, at least one of the lead wires 312 may be covered with a heat-resistant and insulating film such as fluorine or polycarbonate to prevent conduction during deformation.

(Cooking operation)
Next, the heating operation of the heating cooker 100 in the present embodiment will be described. The appliance side control unit 22 of the heating cooker 100 executes the automatic cooking mode in which the target temperature is set. In the automatic cooking mode, the heating control of the heating coil 14 is performed so that the temperature acquired from the temperature detection device 30 becomes the target temperature. The automatic cooking mode is set by the automatic menu key 3b of the operation display unit 3.

  In the automatic cooking mode, when the temperature detection device 30 and the heating cooker 100 are linked to perform heating control, if the temperature detection device 30 is not disposed on the heating port 6 to be heated, the container 10 to be heated The temperature cannot be detected, and incorrect heating control is performed. Therefore, the device-side control unit 22 of the present embodiment performs a sensor determination process for determining whether or not the temperature detection device 30 is disposed on the heating port 6 to be heated before executing the automatic cooking mode. . In the sensor determination process, first, a state confirmation signal is transmitted from the device side control unit 22 to the sensor side control unit 332 of the temperature detection device 30. And the signal which shows that the power supply of the temperature detection apparatus 30 is an ON state is transmitted from the sensor side control part 332 to the apparatus side control part 22. FIG. And the apparatus side control part 22 is the temperature on the heating port 6 heated, when the temperature change of the temperature detection apparatus 30 when predetermined time passes after a heating start is in the predetermined tolerance. It determines with the detection apparatus 30 having been arrange | positioned, and starts the heating control by automatic cooking mode. On the other hand, when the temperature change of the temperature detection device 30 is not within the allowable range, the device-side control unit 22 determines that the temperature detection device 30 is not disposed on the heated heating port 6 and performs heating. To stop.

  In the heating control in the automatic cooking mode, the sensor-side control unit 332 of the temperature detection device 30 causes the sensor-side communication unit 331 to transmit the temperature information detected by the first temperature sensor 34, for example, at a cycle of 1 second. The device side communication unit 21 of the main body 1 receives the temperature information from the temperature detection device 30, and the device side control unit 22 acquires the temperature information received by the device side communication unit 21. The device-side control unit 22 controls the high-frequency inverter 24 toward a preset target temperature, and repeats the stop and start of heating so that the temperature information becomes the target temperature. At this time, in addition to the temperature information from the temperature detection device 30, the detection temperatures of the infrared temperature sensor 27 and the contact temperature sensor 28 may be used.

  As described above, in the present embodiment, the temperature detection device 30 directly detects the temperature of the container 10, thereby improving detection accuracy and detection follow-up. The temperature detection device 30 includes a second temperature sensor 35 for detecting the temperature of the top plate 2, and the detection temperature of the first temperature sensor 34 is corrected according to the detection temperature of the second temperature sensor 35. The influence of the temperature of the top plate 2 can be reduced, and the temperature of the bottom of the container 10 can be obtained with high accuracy. In particular, even when the temperature of the top plate 2 changes, such as when cooking for a long time or when cooking repeatedly, the actual temperature of the container 10 can be accurately captured. As a result, highly accurate temperature control in the automatic cooking mode is possible, cooking failure due to excessive temperature rise can be suppressed, and cooking suitable for foods can be performed without the user performing a heating power changing operation. Therefore, it is possible to improve convenience, to suppress the temperature rise due to spilling or emptying, and to suppress unnecessary heating.

  Moreover, it is not necessary to provide a temperature sensor and a communication part in the container 10 by using the temperature detection apparatus 30 in which the placing part 31 and the communication part 33 are integrally formed. be able to. Furthermore, by performing the sensor determination process in the device-side control unit 22, it is possible to prevent erroneous heating control when the temperature detection device 30 is not disposed in the heating port 6. In addition, by providing the flat temperature detection device 30 between the container 10 and the top plate 2, the top plate 2 can be prevented from being burnt.

  Further, the lead wire 312 that connects the first temperature sensor 34 and the sensor-side control unit 332 in the temperature detection device 30 intersects with the winding direction R of the heating coil 14 in a plan view during use (for example, winding) By arranging in a direction orthogonal to the direction R), it is possible to suppress the influence of electromagnetic noise and improve the detection accuracy. Superposition of electromagnetic noise in the lead wire is suppressed, and stable temperature detection and communication of the container 10 can be performed with high accuracy. As a result, it becomes possible to appropriately control the temperature of the food.

  In addition, in place of or in addition to arranging the lead wire 312 in a direction orthogonal to the winding direction R of the heating coil 14 in a plan view at the time of use, the temperature detection timing in the temperature detection device 30 is changed. By adjusting, the influence of electromagnetic noise may be suppressed.

  Specifically, electromagnetic noise is generated by stopping the energization of the heating coil 14 at a predetermined timing and performing temperature detection by the temperature detection device 30 and transmission of the detection result during a period when the energization of the heating coil 14 is stopped. Can alleviate the effects. Alternatively, the heating coil 14 may be driven uniformly with a predetermined power, the influence degree of noise may be constant, the detection result of the temperature detection device 30 may be corrected with the influence degree, and the temperature may be converted. In these cases, the device-side control unit 22 and the sensor-side control unit 332 notify the timing.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. The temperature detection device 30A according to the present embodiment is different from the first embodiment in the arrangement of the first temperature sensor 34 and the second temperature sensor 35. About the other structure of 30 A of temperature detection apparatuses, and the structure of the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 8 is a plan view of the temperature detection device 30A in the present embodiment, and FIG. 9 is a diagram illustrating the internal configuration of the temperature detection device 30A in the present embodiment. As described above, in the temperature detection device 30 according to the first embodiment, the first temperature sensor 34 is disposed in each protrusion 311, and the second temperature sensor 35 is disposed below each first temperature sensor 34. On the other hand, in the present embodiment, as shown in FIG. 8, the first temperature sensors 34 and the second temperature sensors 35 are alternately arranged on the same circle. Specifically, as shown in FIGS. 8 and 9, the first temperature sensor 34 is disposed in each of the two protrusions 311 out of the four protrusions 311 disposed on the same circle. . The second temperature sensor 35 is not disposed below the first temperature sensor 34. A second temperature sensor 35 is disposed below the remaining two protrusions 311 where the first temperature sensor 34 is not disposed. That is, in the present embodiment, the two first temperature sensors 34 and the two second temperature sensors 35 are alternately arranged for the four protrusions 311. The first temperature sensor 34 and the second temperature sensor 35 are the same as those in the first embodiment.

  According to the present embodiment, in addition to the effects of the first embodiment, it is possible to reduce the number of parts and simplify the routing of wiring. In addition, since the overheat state becomes substantially the same by arranging the first temperature sensor 34 and the second temperature sensor 35 on the same circle, the detection of the first temperature sensor 34 using the detection temperature of the second temperature sensor 35. The temperature correction will not deviate.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. The temperature detection device 30 </ b> B of the present embodiment is different from the first embodiment in that a heat insulating layer is provided below the first temperature sensor 34 and the arrangement of the second temperature sensor 35. About the other structure of the temperature detection apparatus 30B, and the structure of the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 10 is a schematic cross-sectional view of the temperature detection device 30B in the present embodiment. In the temperature detection device 30 </ b> B of the present embodiment, a heat insulating layer is provided below the first temperature sensor 34 in order to reduce the influence of the temperature of the top plate 2. Specifically, a concave portion 316 that is concave in the protruding direction of the protruding portion 311 is formed on the second surface 302 that contacts the top plate 2. The concave portion 316 is disposed below the first temperature sensor 34 and at a position overlapping the first temperature sensor 34 in plan view. Thereby, in a state where the temperature detection device 30B is placed on the top plate 2, an air layer is formed between the top plate 2 and the first temperature sensor 34, and functions as a heat insulating layer. As a result, the influence of the temperature of the top plate 2 is suppressed, and the accuracy of detecting the temperature of the container 10 by the first temperature sensor 34 is improved. The concave portion 316 may have a dome shape similar to the protruding portion 311, or may have another shape as long as it forms an air layer.

  As described above, by providing the heat insulating layer below the first temperature sensor 34, the influence of the heat conduction in the vertical direction from the top plate 2 can be reduced. However, the heat from the lateral direction from the top plate 2 can be reduced. The effect of conduction cannot be ignored. Therefore, the temperature detection device 30 </ b> B of the present embodiment includes a second temperature sensor 35 for detecting the temperature of the top plate 2 outside the recess 316 of the second surface 302. The second temperature sensor 35 is disposed at a position that does not overlap the first temperature sensor 34 in a plan view (a position that is offset laterally from the first temperature sensor 34 in a horizontal view). As in the first embodiment, the detected temperature of the first temperature sensor 34 is corrected using the detected temperature of the second temperature sensor 35.

  According to the present embodiment, in addition to the effects of the first embodiment, the accuracy of the temperature detected by the first temperature sensor 34 is further improved, and the influence of the top plate 2 whose influence has been reduced is corrected, thereby increasing the accuracy. Accurate temperature detection is possible. Further, by arranging the second temperature sensor 35 so as to be shifted from the lower side of the first temperature sensor 34, the complexity of the routing of the lead wire 312 can be reduced.

  FIG. 11 is a schematic cross-sectional view of a temperature detection device 30C according to Modification 1 of the present embodiment. In the present modification, a heat insulating layer is formed below the first temperature sensor 34 by filling the recess 316 with the heat insulating material 317. As the heat insulating material 317 filled in the concave portion 316, a material (for example, ceramic) having a larger heat capacity than the silicone rubber that is the material of the placement unit 31 is used. Thus, by forming the heat insulation layer by the heat insulating material 317 between the top plate 2 and the first temperature sensor 34, the influence of the temperature of the top plate 2 is further suppressed, and the container 10 by the first temperature sensor 34. The detection accuracy of the bottom temperature of the is improved.

  FIG. 12 is a schematic cross-sectional view of a temperature detection device 30D according to Modification 2 of the present embodiment. In the present modification, the heat insulating layer is formed by disposing the heat insulating portions 36 below the first temperature sensor 34 and above the second temperature sensor 35 inside the placement portion 31. The heat insulating part 36 is made of a material (for example, ceramic) having a larger heat capacity than the silicone rubber that is the material of the placement part 31. When configured in this manner, the detection accuracy of the bottom temperature of the container 10 by the first temperature sensor 34 and the temperature detection accuracy of the top plate 2 by the second temperature sensor 35 are improved. The heat insulating portion 36 may be provided at least one of the lower side of the first temperature sensor 34 and the upper side of the second temperature sensor 35. In FIG. 12, the second temperature sensor 35 is disposed at a position that does not overlap the first temperature sensor 34 in a plan view (a position offset laterally from the first temperature sensor 34 in a horizontal view). You may arrange | position in the position which overlaps with the temperature sensor 34. FIG.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. The temperature detection device 30 </ b> E according to the present embodiment is different from the first embodiment in that it includes a heat sensitive unit 37. About the other structure of the temperature detection apparatus 30E, and the structure of the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 13 is a schematic cross-sectional view of the temperature detection device 30E in the present embodiment. As shown in FIG. 13, heat sensitive portions 37 are respectively disposed above the first temperature sensor 34 and below the second temperature sensor 35 of the temperature detection device 30E. The heat sensitive part 37 is formed of a material having high thermal conductivity such as aluminum. The 1st temperature sensor 34 and the 2nd temperature sensor 35 are arrange | positioned so that it may thermally connect with the thermosensitive part 37, respectively.

  According to the present embodiment, in addition to the effects of the first embodiment, the bottom temperature of the container 10 and the top surface temperature of the top plate 2 can be detected with high sensitivity. Furthermore, the impact and abrasion by contact with the container 10 and the top plate 2 during cooking can be suppressed. The heat sensitive part 37 may be provided above at least one of the first temperature sensor 34 and the second temperature sensor 35. In FIG. 13, the second temperature sensor 35 is disposed at a position that does not overlap with the first temperature sensor 34 in a plan view (a position offset laterally from the first temperature sensor 34 in a horizontal view). You may arrange | position in the position which overlaps with the temperature sensor 34. FIG.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described. The temperature detection device 30F of the present embodiment is different from the first embodiment in that it includes a sensor case. About the other structure of the temperature detection apparatus 30F, and the structure of the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 14 is a schematic cross-sectional view of the temperature detection device 30F in the present embodiment. As shown in FIG. 14, the first temperature sensor 34 and the second temperature sensor 35 of the temperature detection device 30F are housed in sensor cases 381 and 382, respectively. The sensor cases 381 and 382 are arranged in the mounting portion 31 and have a heat insulating portion 36 formed of a material having a low thermal conductivity such as ceramic and a heat sensitive portion 37 formed of a material having a high thermal conductivity such as aluminum. And have. The sensor case 381 has a main body formed of a heat insulating portion 36, and a heat sensitive portion 37 is disposed above the first temperature sensor 34. The sensor case 382 has a main body formed of the heat insulating portion 36, and the heat sensitive portion 37 is disposed below the second temperature sensor 35. The first temperature sensor 34 and the second temperature sensor 35 are thermally connected to the heat sensitive unit 37, respectively.

  According to the present embodiment, the sensitivity and detection accuracy of the first temperature sensor 34 and the second temperature sensor 35 can be further increased, and the accurate bottom temperature of the container 10 placed on the placement unit 31 is detected. Heating control can be performed. Note that at least one of the first temperature sensor 34 and the second temperature sensor 35 may be accommodated in the sensor case. In FIG. 14, the second temperature sensor 35 is disposed at a position that does not overlap with the first temperature sensor 34 in a plan view (a position that is laterally offset from the first temperature sensor 34 in a horizontal view). You may arrange | position in the position which overlaps with the temperature sensor 34. FIG.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described. The present embodiment is different from the first embodiment in the shape of the heating coil 14 of the cooking device 100 and the arrangement of the first temperature sensor 34 and the second temperature sensor 35 of the temperature detection device 30G. About the other structure of the temperature detection apparatus 30G and the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 15 is a plan view of temperature detecting device 30G in the present embodiment. In FIG. 15, the heating coil 14 disposed below the temperature detection device 30G is indicated by a broken line in a state where the temperature detection device 30G is used. As shown in FIG. 15, the heating coil 14 of the present embodiment is arranged on the inner coil 14 c wound inward and vertically on the inner coil 14 c in the plan view (front side and rear side in the horizontal view). The first outer coil group 14d and the second outer coil group 14e arranged on the left and right (left and right in horizontal view) with respect to the inner coil 14c in plan view. The inner coil 14c, the first outer coil group 14d, and the second outer coil group 14e are connected to a switching circuit (not shown), and the driving coil is switched according to the size of the container 10 and the contents of the cooking. Thereby, uniform heating or convection can be switched to perform stew cooking, and unnecessary power input can be suppressed in accordance with the size of the container 10. The inner coil 14c, the first outer coil group 14d, and the second outer coil group 14e may be connected to different high-frequency inverters 24 and driven independently from each other.

  As shown in FIG. 15, the protrusion 311 of the mounting portion 31 of the temperature detection device 30G of the present embodiment is disposed corresponding to the inner coil 14c, the first outer coil group 14d, and the second outer coil group 14e. The Specifically, the mounting portion 31 includes a protrusion 311c corresponding to the inner coil 14c, a protrusion 311d corresponding to the first outer coil group 14d, and a protrusion 311e corresponding to the second outer coil group 14e. A first temperature sensor 34 is disposed inside each of the protrusions 311c, 311d, and 311e, and a second temperature sensor 35 is disposed below the first temperature sensor 34. In this embodiment, since it is necessary to position the first temperature sensor 34 and the second temperature sensor 35 on the heating coil 14, a display indicating the arrangement position of the communication unit 33 is performed on the upper surface of the top plate 2.

  FIG. 16 is a plan view of a temperature detection device 30H according to a modification of the present embodiment. As illustrated in FIG. 16, the temperature detection device 30H includes a plurality of inner protrusions 311u arranged on the circumference of the diameter D2, and a plurality of outer protrusions 311s arranged on the circumference of the diameter D3. . The diameter D2 is set so that the inner protrusion 311u is disposed above the inner coil 14c so as to overlap the inner coil 14c in plan view. Further, the diameter D3 is arranged such that the outer protrusion 311s overlaps the first outer coil group 14d and the second outer coil group 14e in plan view above the first outer coil group 14d and the second outer coil group 14e. Is set to

  The protrusion heights of the inner protrusion 311u and the outer protrusion 311s are the same. In another embodiment, the protruding height of the outer protruding portion 311s may be higher than that of the inner protruding portion 311u. Further, by reducing the hardness of the inner protrusion 311 u and the outer protrusion 311 s, the outer protrusion 311 s is crushed by the weight of the container 10, and all the protrusions can be brought into contact with the container 10. A first temperature sensor 34 is disposed inside each of the inner protrusion 311 u and the outer protrusion 311 s, and a second temperature sensor 35 is disposed below the first temperature sensor 34.

  The apparatus side control part 22 of this Embodiment performs the heating control according to the selected cooking menu, referring the temperature transmitted from the temperature detection apparatus 30G or 30H, measuring the temperature distribution of the pan bottom of the container 10. FIG. . For example, when “steil” is set in the automatic cooking mode to stew vegetables, the temperature is initially raised to 60 ° C. and kept at the temperature at which the pectin contained in the vegetables is cured by keeping 60 ° C. Pass a temperature that is difficult to do. And after that, the energization pattern of the inner coil 14c, the first outer coil group 14d and the second outer coil group 14e is changed, and the seasoning liquid around the ingredients is not even convection while maintaining 90 ° C. where the scent of the soup stock does not fly. Wake up and promote the soaking of taste. The set temperature and energization pattern of the cooking menu are examples, and are not limited thereto.

  According to the present embodiment, even when the heating coils 14 are individually driven and the heating distribution on the top plate 2 changes, the first temperature sensor 34 and the second temperature sensor 35 arranged corresponding to the heating coils. Thus, the temperature of the object to be heated (container 10) can be detected appropriately. Note that the arrangement and number of the protrusions 311 shown in FIGS. 15 and 16 are examples, and are not limited to these, and various arrangements and numbers may be used depending on the arrangement and shape of the heating coil 14. Can do.

  As mentioned above, although embodiment of this invention was described with reference to drawings, the specific structure of this invention is not restricted to these, In the range which does not deviate from the summary of invention, it can change. For example, the shape of the mounting portion 31 is not limited to a circle, and may be various shapes such as an ellipse, a rectangle, and a polygon. Further, the shape of the protrusion 311 is not limited to the dome shape, and may be a cylinder or a prismatic shape in which the surface in contact with the container 10 is a flat surface. Furthermore, it is good also as a structure which is not equipped with the projection part 311 in the mounting part 31. FIG. In this case, the first temperature sensor 34 is disposed on the surface of the placement unit 31 on which the container 10 is placed.

  In the above embodiment, the configuration in which the four protrusions 311 are formed and the first temperature sensor 34 is disposed in each protrusion 311 has been described. However, the present invention is not limited to this. For example, the first temperature sensor 34 may be provided on any one of the four protrusions 311. By setting it as such a structure, the number of parts of the temperature detection apparatus 30 can be reduced. Furthermore, since the wiring of the lead wire 312 that connects the first temperature sensor 34 and the communication unit 33 is also simplified, assembly is facilitated. In addition, it is good also as a structure provided with the 1 or more 1st temperature sensor 34 in the 3 or less or 3 or more protrusion part 311. FIG.

  Furthermore, although the power supply unit 333 is a detachable battery in the above embodiment, the present invention is not limited to this. For example, it is good also as a structure which provides a receiving coil in the temperature detection apparatus 30, and charges a charging part by non-contact electric power feeding from the heating cooker 100. FIG. In this case, since battery replacement is not required, the placement unit 31 and the outer shell of the communication unit 33 can be integrally formed, and the water tightness of the temperature detection device 30 can be ensured.

  Moreover, in the said embodiment, although it was set as the structure which correct | amends the detection temperature of the 1st temperature sensor 34 in the sensor side control part 332, it is not limited to this. For example, the detected temperature of the first temperature sensor 34 and the detected temperature of the second temperature sensor 35 may be transmitted to the device side control unit 22, and the device side control unit 22 may correct the detected temperature of the first temperature sensor 34. .

  In addition, when correcting the temperature detected by the first temperature sensor 34, in the case of a configuration in which a plurality of heating coils are switched and driven as in the sixth embodiment, the first temperature that is referred to according to the driving situation. The sensor 34 may be changed. Thereby, the temperature detection position matched with the heating pattern of a heating part can be limited, and temperature detection can be carried out according to the position which shows the highest temperature, or the inner side or the outer side of the heating coil 14.

  Furthermore, in the said embodiment, although it was set as the structure which the temperature detection apparatus 30 and the heating cooker 100 perform two-way communication, the sensor side communication part 331 of the temperature detection apparatus 30 is only transmitted, and the apparatus of the heating cooker 100 is used. Unidirectional information communication may be performed with the side communication unit 21 receiving only. In this case, the sensor-side communication unit 331 transmits temperature information detected by the first temperature sensor 34 to the device-side communication unit 21, and the device-side control unit 22 drives to drive the high-frequency inverter 24 based on the received temperature information. The temperature of the container 10 can be controlled by controlling the portion 23 to control the thermal power.

  As a unidirectional communication method, infrared communication may be used. An infrared LED is used for the sensor side communication unit 331 (transmission side), and an on / off infrared pulse signal is generated. The device-side communication unit 21 (reception side) uses an element that receives infrared rays (for example, a photodiode or a phototransistor), and can receive temperature information by receiving an infrared pulse signal.

  1 Main body, 2 Top plate, 3 Operation display section, 3a Status display section, 3b Automatic menu key, 3c Thermal power setting key, 3d Timer setting key, 4 Front operation display section, 4a Power switch, 5 Thermal power display section, 5a Thermal power display 5b Communication status display, 6 heating port, 7 exhaust port, 8 communication port, 9 grill, 10 container, 14 heating coil, 14a inner heating coil, 14b outer heating coil, 14c inner coil, 14d first outer coil group, 14e 2nd outer side coil group, 21 apparatus side communication part, 22 apparatus side control part, 23 drive part, 24 high frequency inverter, 27 infrared temperature sensor, 28 contact-type temperature sensor, 30 temperature detection device, 30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H Temperature detection device, 31 placement unit, 33 communication unit, 34 1st Degree sensor, 35 second temperature sensor, 36 heat insulation part, 37 heat sensitive part, 100 heating cooker, 270 infrared temperature detection part, 280 contact type temperature detection part, 301 first surface, 302 second surface, 311 protrusion, 311c Projection, 311d Projection, 311e Projection, 311s Outer Projection, 311u Inner Projection, 312 Lead Wire, 316 Recess, 317 Thermal Insulation, 330 Housing, 330a Upper Surface, 330b Main Body, 331 Sensor Side Communication Unit, 332 Sensor Side control unit, 333 power supply unit, 381, 382 Sensor case.

Claims (12)

A placement unit having a first surface on which an object to be heated is placed and a second surface in contact with the top plate;
A first temperature sensor disposed in the mounting portion and detecting a temperature on the first surface;
A second temperature sensor disposed in the mounting portion and detecting a temperature on the second surface;
A first communication unit that transmits the detected temperature of the first temperature sensor corrected by using the detected temperature of the first temperature sensor and the second temperature sensor, or the detected temperature of the second temperature sensor;
A temperature sensing device comprising: A plurality of protrusions are formed on the first surface,
The temperature detection device according to claim 1, wherein the first temperature sensor is disposed on at least one of the plurality of protrusions.   The temperature detection device according to claim 1, wherein the second temperature sensor is disposed below the first temperature sensor and in a position overlapping the first temperature sensor in a plan view. .   The temperature detection device according to claim 1, wherein the first temperature sensor and the second temperature sensor are alternately arranged on the same circle. A heat insulating layer is formed below the first temperature sensor at a position overlapping the first temperature sensor in plan view,
The temperature detection device according to claim 1, wherein the second temperature sensor is disposed outside the heat insulating layer.   The temperature detection device according to any one of claims 1 to 3, further comprising a heat insulating portion disposed at least one of the lower side of the first temperature sensor and the upper side of the second temperature sensor. .   The temperature detection device according to any one of claims 1 to 3, further comprising a heat-sensitive portion disposed at least one of the first temperature sensor and the second temperature sensor. . A sensor case that houses at least one of the first temperature sensor and the second temperature sensor;
The temperature detection device according to claim 1, wherein the sensor case includes a heat sensitive part and a heat insulating part.   The temperature detection device according to claim 1, further comprising a first control unit that corrects the detection temperature of the first temperature sensor using the detection temperature of the second temperature sensor. . The temperature detection device according to any one of claims 1 to 9,
The top plate on which the object to be heated and the temperature detection device are placed;
A heating unit for heating the object to be heated;
A second communication unit that receives temperature information transmitted from the temperature detection device;
A second control unit that controls the heating unit based on the temperature information received by the second communication unit;
A heating cooker comprising. The heating unit is composed of a plurality of heating coils driven independently,
The cooking device according to claim 10, wherein the first temperature sensor is disposed at a position corresponding to the plurality of heating coils. The second control unit has an automatic cooking mode in which a target temperature is set,
The automatic cooking mode, wherein the plurality of heating coils are driven while changing an energization pattern so that the temperature received from the temperature detection device becomes the target temperature. Cooking cooker.

Images