JP6509388B2 - Temperature detection device and heating cooker - Google Patents

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 heating cooker that operates in cooperation with the temperature detection device.

  In the conventional heating cooker, it is known to detect the temperature of a container such as a pan in which a food or the like is accommodated and to perform heating control automatically based on the detected temperature. For example, in the heating cooker described in Patent Document 1, an infrared sensor is provided on the lower surface of the top plate, and infrared radiation emitted from the bottom of the pan is detected to calculate the pan bottom temperature to perform heating control. . Moreover, in patent document 2 and patent document 3, a temperature sensor is arrange | positioned in the height direction inside the pan bottom, or the side surface inside of a pan, and the structure which transmits detected temperature information to a heating cooker and performs heating control Is described. Furthermore, Patent Document 4 includes a pan bottom and a handle attached to the pan body, arranges a temperature sensor at the pan bottom, and transmits temperature information detected by the temperature sensor via a communication circuit provided on the steering wheel. Configuration is described.

Unexamined-Japanese-Patent No. 2003-249341 (refer Claim 1) Unexamined-Japanese-Patent No. 2007-53038 (refer FIG. 1) Patent No. 4936814 gazette (refer to Drawing 1) JP 2012-514495 A (see FIG. 12)

  In the case of the configuration described in Patent Document 1, a part of the infrared radiation emitted from the pan bottom is shielded (absorbed and reflected) by the top plate, and the material and surface treatment of the bottom of the container cause the emissivity of the infrared radiation to be Accurate temperature detection is difficult due to factors such as different things.

  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, it is possible to improve the followability and accuracy of the temperature detection. However, only certain pans with internal temperature sensors 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 can not 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 the usability is deteriorated.

  The present invention was made on the background of the above problems, and an object of the present invention is to provide a temperature detection device and a heating cooker which can detect temperature of a container of various shapes with high accuracy.

The temperature detection device according to the present invention is separately disposed on the top plate of the induction heating cooker, and the mounting portion on which the bottom portion of the container in which the object to be heated is stored is placed, and the container of the mounting portion. A plurality of resilient projections formed on the surface to be placed, and a first temperature sensor disposed inside at least one of the plurality of protrusions and detecting the temperature of the bottom of the container, and the placement It is connected to the part, a first communication unit for transmitting the temperature information detected by the first temperature sensor, with a thickness of the mounting portion including a plurality of projections Ri der less than 5 mm, the plurality of projections , when the container is placed, which in close contact with the bottom of the vessel, thereby you increase the contact area between the container and the mounting part.

  According to the temperature detection device of the present invention, containers of various shapes can be mounted on the mounting portion, and the temperature of the container can be directly detected by the temperature sensor disposed on the mounting portion. Further, the communication unit connected to the placement unit can transmit the highly accurate temperature information detected by the temperature sensor.

1 is a perspective view of a heating cooker according to Embodiment 1. FIG. FIG. 2 is a diagram for explaining the configuration and function of main parts of the heating cooker according to the first embodiment. It is a figure explaining the operation part and thermal-power display part of the heating cooker in Embodiment 1. FIG. (A) is a top view of the temperature detection apparatus in Embodiment 1, (b) is a side view. FIG. 2 is a diagram for explaining an internal configuration of a temperature detection device in Embodiment 1. It is a graph which shows the relationship between the distance from a top plate to a container bottom part, and heating efficiency. (A) is a graph which shows an example of transition of the detection temperature of a temperature detection apparatus, (b) is a graph which shows an example of transition of the electric power supplied to a heating coil. 7 is a table showing an example of a determination result based on a temperature difference ΔT_pro according to the first embodiment and an operation according to the determination result. 5 is a flowchart showing a flow of sensor determination processing in Embodiment 1. FIG. 7 is a plan view of a temperature detection device in Embodiment 2; 15 is a flowchart showing a flow of sensor determination processing when the temperature detection device in Embodiment 2 is used. FIG. 16 is a plan view of a temperature detection device in a third embodiment. (A) is a top view of the temperature detection apparatus in Embodiment 4, (b) is a side view. It is a figure explaining the structure of the temperature detection apparatus 30 in Embodiment 5, and a heating cooker. FIG. 18 is a diagram for explaining a configuration of a temperature detection device 30 according to a sixth embodiment. It is a figure explaining the structure and function of the principal part of the heating cooker in Embodiment 7. FIG. (A) is a graph which shows an example of transition of the detection temperature of a temperature detection apparatus, (b) is a graph which shows an example of transition of a detection temperature of an infrared temperature sensor, (c) is a heating coil It is a graph which shows an example of transition of the electric power supplied. 51 is a table illustrating an example of determination results based on the temperature difference ΔT_pro and the temperature difference ΔT_ir in the seventh embodiment and an operation according to the determination results. It is a flowchart which shows the flow of the sensor determination processing in Embodiment 7. FIG. FIG. 21 is a perspective view of the heating cooker according to the eighth embodiment. It is an example of a display of the operation display part of the heating cooker in Embodiment 8. FIG. It is a flowchart which shows the heating operation of the heating cooker in Embodiment 8. FIG. It is a flow chart which shows a flow of sensor judging processing in modification 1. It is a flowchart which shows the flow of the sensor determination process in the modification 2. FIG.

  Hereinafter, embodiments of a temperature detection device and a heating cooker in the present invention will be described using the drawings. Note that detailed structures and redundant or similar descriptions are appropriately simplified or omitted. In the following embodiment, an induction heating cooker will be described as an example of a heating cooker.

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

  On the upper surface of the main body 1, an operation unit 3 that receives an input operation of a heating condition and a heating instruction is disposed corresponding to each heating port 6. Further, on the front surface of the main body 1, a front operation unit 3a configured of, for example, a dial switch and receiving an input operation of a heating condition and a heating instruction is disposed.

  The user places the container 10 containing the object to be heated on the top plate 2 and operates the operation unit 3 or the front operation unit 3a corresponding to the heating port 6 to set the heating condition etc. According to the contents, the container 10 is heated by the heating unit. Information on the progress of heating, setting of cooking mode, etc. is displayed on the display unit 4 having liquid crystal and the like disposed on the upper surface of the top plate 2, and the heating power is displayed on the heating power corresponding to each heating port. Displayed in section 5.

  In a portion corresponding to the heating port 6 of the top plate 2, for example, a circular display indicating a place where the container 10 is to be placed is provided by printing or the like, and the user can know the place where the container 10 is to be placed. It has become.

  A heating coil 14 is provided below the heating port 6 in the main body 1. The heating coil 14 corresponds to the "heating unit" of the present invention. In FIG. 1, the arrangement of the heating coil 14 is illustrated by a broken line. An eddy current is generated in the container 10 placed on the top plate 2 by supplying a high frequency current to the heating coil 14, and the resistance of the generated eddy current and the container 10 causes the container 10 to generate heat. Thereby, the cooking of the heating efficiency which directly heats the container 10 is realizable. 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.

  FIG. 2: is a figure explaining the structure and function of the principal part of the heating cooker 100 in this Embodiment. In addition, in FIG. 2, only the structure corresponding to one heating port 6 is illustrated, Moreover, the temperature detection apparatus which detects the temperature of the container 10 which accommodated to-be-heated materials, such as water and a foodstuff, for example, and the container 10 30 is shown together. 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 of 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 14 a and a substantially annular outer heating coil 14 b provided on the outside thereof.

  Inside the main body 1, a device communication unit 21 communicating with the temperature detection device 30, a device control unit 22 controlling the drive unit 23, a drive unit 23 driving the high frequency inverter 24, and a heating coil 14 The high frequency inverter 24 which supplies an electric current is arrange | positioned. 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 unit 3 and the temperature information from the temperature detection device 30. The device-side control unit 22 is configured using hardware such as a circuit device that realizes the function, or is configured with 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 control unit 22 to adjust the high frequency current flowing through the heating coil 14. Thus, heating control of the container 10 is performed. Further, the device-side control unit 22 generates a signal for confirming the state of the temperature detection device 30, and transmits the signal to the temperature detection device 30 via the device-side communication unit 21.

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

  Next, configurations of the operation unit 3 and the thermal power display unit 5 of the heating cooker 100 will be described. Drawing 3 is a figure explaining operation part 3 and firepower display part 5 of cooking-by-heating machine 100 in this embodiment. Since the operation unit 3 and the thermal power display unit 5 respectively corresponding to the heating coil 14 provided on the left side, the right side, and the center of the heating cooker 100 have the same configuration, they correspond to the heating coil 14 on the left side here. The operation unit 3 and the thermal power display unit 5 provided as an example will be described.

  The operation unit 3 includes a thermal power setting key 3 b for setting a thermal power for heating an object to be heated, and a menu key 3 c for setting a cooking menu. The fire power setting key 3b is composed of a "low fire" key, a "mid fire" key, a "high fire" key, and a "3 kW" key, and the user uses one of these keys to select one of four levels of fire power. It can be set. By individually providing keys according to the thermal power, the user can input necessary thermal power settings with a single operation.

  The menu key 3c includes a "fry" key, a "preheat" key, a "simmer" key, and a "timer" key. When these keys are pressed, the device-side control unit 22 performs heating control in accordance with a control sequence which is preset for each menu and stored in the storage unit (not shown).

  The thermal power display unit 5 displays the thermal power in a plurality of stages based on the thermal power input by the thermal power setting key 3b or the menu set by the menu key 3c, and the display mode is switched according to the thermal power. It is possible to show the user that it is in operation by the display of the thermal power display unit 5. The thermal power display unit 5 has, for example, a plurality of LEDs, and expresses the thermal power by switching the lighting state (lighting, extinguishing, blinking, etc.) of these LEDs or switching the lighting color. By doing this, it is possible to perform notification that the user can intuitively understand.

  Although not illustrated in FIG. 3, the display unit 4 (see FIG. 1) configured with a liquid crystal screen or the like has, for example, thermal power such as "under preheating" or "appropriate temperature reached" and a set status Information on the contents of the is displayed.

(Configuration of temperature detection device)
Next, the configuration of the temperature detection device 30 according to the present embodiment will be described. FIG. 4 (a) is a plan view of the temperature detection device 30, and FIG. 4 (b) is a side view of the temperature detection device 30. Moreover, FIG. 5 is a figure explaining the internal structure of the temperature detection apparatus 30. As shown in FIG. As shown in FIG. 4, the temperature detection device 30 has a planar shape like a pan and is provided with a placement unit 31 on which the container 10 is placed, and a communication unit 33 that communicates with the device communication unit 21. And a connection unit 32 for connecting the placement unit 31 and the communication unit 33.

  The mounting portion 31 has an annular shape in which an opening 31a is formed at the center in plan view in use, and is made of silicone rubber or the like having elasticity and heat resistance. A plurality of dome-shaped protrusions 311 are formed on the surface of the placement unit 31 on which the container 10 is placed. The plurality of protrusions 311 are equally spaced on the circumference of diameter D. The diameter D of the circle in which the protrusion 311 is disposed is determined from the minimum diameter of the container 10 to be placed, and is 40 mm, for example. A temperature sensor 34 is disposed in each of the plurality of protrusions 311. The temperature sensor 34 is a contact-type temperature sensor, and detects the temperature of the bottom of the container 10 placed on the placement unit 31. The temperature sensor 34 is composed of, for example, a thermistor or a thermocouple.

  When the container 10 is placed on the placement unit 31, the bottom of the container 10 contacts the protrusion 311. By forming the projecting portion 311 with silicone rubber or the like having elasticity, the bottom portion of the container 10 and the projecting portion 311 are in close contact with each other, and the contact area is increased. Further, by providing the temperature sensor 34 in the protrusion 311 in close contact with the bottom of the container 10, the temperature sensor 34 contacts the bottom of the container 10, and the temperature of the container 10 can be detected with high accuracy.

  In addition, in the example of FIG. 4, although the three projection parts 311 are formed and it becomes a structure by which the temperature sensor 34 is arrange | positioned at each projection part 311, it is not limited to this. For example, the temperature sensor 34 may be provided in any one of the three protrusions 311, or one or more temperature sensors 34 may be provided in two or less or four or more protrusions 311. However, the container 10 can be stably supported by setting the number of the protrusions 311 to three or more. Further, by providing a plurality of temperature sensors 34, temperature detection can be continued even when disconnection or the like occurs.

  Moreover, thickness t of the mounting part 31 shown in FIG.4 (b) shall be less than 5 mm by largest thickness including the projection part 311. As shown in FIG. When the thickness t of the mounting portion 31 is 5 mm, the container 10 mounted on the temperature detection device 30 is separated from the top plate 2 of the heating cooker 100 by about 5 mm. Here, as the container 10 leaves the heating coil 14, the magnetic flux decays in inverse proportion to the square of the distance. Therefore, it is generally considered that the heating efficiency is also reduced by separating the container 10 from the heating coil 14. However, in practice, when the top plate 2 and the container 10 are in contact, part of the heat of the container 10 escapes to the top plate 2.

  FIG. 6 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. 6, 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 magnitude | size of an insulator, changed the distance from the top plate 2 to the container 10, and measured the heating efficiency of the boiling water in each distance. As shown in FIG. 6, the heating efficiency is about 2% 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. Here, the thermal conductivity K of neoceram glass generally used for the top plate 2 is 1.6, and the thermal conductivity K of air is 0.0241. Therefore, heat conduction is less when the air layer is formed than when the container 10 and the top plate 2 are in contact, and the heating efficiency is improved.

  However, as shown in FIG. 6, when the distance from the top plate 2 to the container 10 is 5 mm or more, the heating efficiency is lower than in the case where the distance from the top plate 2 to the container 10 is 0 mm. Therefore, by setting the distance from the top plate 2 to the container 10 to less than 5 mm, a heating efficiency substantially equal to or higher than that in the case where the clearance 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 unit 31 is 0.2, which is higher than the thermal conductivity of air, but by placing the container 10 on the protrusion 311, the container 10 can be used. The contact area with it is limited and heat conduction is suppressed.

  Further, the height of the protrusion 311 is 1 mm in consideration of the warpage of the bottom of the container 10. More specifically, some pots or pans used as the container 10 have their bottoms pre-curved (convex) in consideration of deformation due to heating. For example, assuming that the maximum value of the warpage at the center of the bottom of the container 10 is 3 mm, the warpage gradually becomes smaller toward the outside in the radial direction of the container 10, and the position of 40 mm in diameter where the projection 311 is disposed ( That is, at a position of a radius of 20 mm from the center, the warpage is about 1 mm. Therefore, by setting the protrusion 311 to 1 mm or more, even when the bottom of the container 10 is warped in advance, the protrusion 311 can be reliably brought into contact with the bottom of the container 10.

  Referring back to FIGS. 4 and 5, the plurality of temperature sensors 34 are respectively connected to the communication unit 33 via the connection units 32 and output detection results to the communication unit 33. Further, the communication unit 33 is disposed outside the mounting unit 31 in a plan view at the time of use so as not to be in contact with the container 10 mounted on the mounting unit 31. More specifically, in the state in which the temperature detection device 30 is disposed on the heating port 6, the length of the connection portion 32 is determined such that the communication unit 33 is disposed outside the heating coil 14.

  The communication unit 33 includes a sensor communication unit 331, a sensor control unit 332, and a power supply unit 333. The respective components are accommodated in a cylindrical case 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 top surface 330 a of the housing 330 is formed of a material (for example, aluminum or the like) having an impact resistance and a magnetic shielding effect. Further, the main body 330b is formed of a material (for example, PPS, PC, silicone rubber, ceramics, etc.) which does not shield radio waves and has high heat resistance and friction coefficient, and the surface is 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. In addition, the housing 330 is provided with a power switch (not shown). By operating the power switch, the temperature detection device 30 is turned on.

  The sensor side communication unit 331 performs bi-directional information communication with the device side communication unit 21 disposed in the main body 1 of the heating cooker 100 under the control of the sensor side control unit 332. Information communication between the sensor communication unit 331 and the device communication unit 21 is performed using, for example, a wireless communication module of 2.4 GHz band. By using the wireless module, it is not necessary to provide a connector portion outside the temperature detection device 30, and it is possible to reduce a short circuit due to water immersion into the temperature detection device 30. In addition, since the wiring is not necessary, the wiring can be prevented from being caught by the handle of the container 10 or the like, and for example, the heating port 6 on the back side becomes easy to use and the usability improves. Further, it becomes possible to transmit information to a 2.4 GHz Wi-Fi (IEEE 802.11 standard) module provided in the home, and has extensibility with external wireless communication devices.

  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 band of a 900 MHz band or a frequency band of 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 the frequency band of 20 to 30 kHz, and the frequency of the electromagnetic wave in the microwave oven uses the frequency band of 2.45 GHz. For this reason, if it is a frequency of 900 MHz or 300 to 500 MHz band, communication can be performed without causing interference with other cooking devices.

  In addition to the above, information communication may be performed using Bluetooth (registered trademark) or RFID (Radio Frequency Identifier). However, since it is necessary to position sensor side communications department 331 and apparatus side communications department 21 when using RFID, the display which shows the arrangement position of communications department 33 on the upper surface of top plate 2 is performed. In addition, the information communication between the sensor communication unit 331 and the device 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 using hardware such as a circuit device that realizes the function, or is configured with an arithmetic device such as a microcomputer or a CPU and software executed thereon. The sensor-side control unit 332 transmits the temperature information detected by the temperature sensor 34 to the device-side communication unit 21 via the sensor-side communication unit 331. Here, the highest temperature among the temperatures detected by the plurality of temperature sensors 34 is transmitted as temperature information. In another embodiment, the average value of the temperatures detected by the plurality of temperature sensors 34 may be transmitted as temperature information. 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 is on to the device-side control unit 22 via the sensor communication unit 331. Send. The power supply unit 333 is a battery for supplying power to each component.

  The sensor communication unit 331 corresponds to the “first communication unit” in the present invention. Further, the temperature sensor 34 corresponds to the "first temperature sensor" in the present invention.

(Heating operation)
Next, the heating operation of the heating cooker 100 in the present embodiment will be described. The device side control unit 22 of the heating cooker 100 has an automatic cooking mode in which a target temperature is set. In the automatic cooking mode, heating control of the heating coil 14 is performed such that the temperature acquired from the temperature detection device 30 becomes the target temperature. Examples of the automatic cooking mode include a boiling mode, a fry cooking mode, a simmering mode, a noodle boiling mode, a hot spring egg mode, and a constant temperature control mode. In each mode, at least one of the target temperature and the heating time is different from the other modes. The device control unit 22 may be configured to execute at least one of these modes.

  When the temperature detection device 30 and the heating cooker 100 are interlocked to perform heating control in the automatic cooking mode, if the temperature detection device 30 is not disposed on the heating port 6 to be heated, the temperature of the container 10 to be heated. The temperature can not be detected and erroneous heating control is performed. Therefore, before performing the automatic cooking mode, the device-side control unit 22 according to the present embodiment performs a sensor determination process to determine whether the temperature detection device 30 is disposed on the heating port 6 to be heated. .

  FIG. 7A is a graph showing an example of the transition of the detected temperature of the temperature detection device 30, and FIG. 7B is a graph showing an example of the transition of the power supplied to the heating coil. Here, when the temperature detection device 30 is disposed above the heating port 6 being heated, the temperature detected by the temperature detection device 30 rises with the passage of time as shown in FIG. 7A. . When the temperature difference (ΔT_pro) after a predetermined time (Time_A) elapses is within the predetermined allowable range, it is determined that the temperature detection device 30 is disposed above the heating port 6 being heated. Ru.

  FIG. 8 is a table showing an example of the determination result based on the temperature difference ΔT_pro and an operation according to the determination result. As shown in FIG. 8, when the temperature difference ΔT_pro is 15 ° C. or less, that is, when the temperature change after a predetermined time has elapsed is smaller than the allowable range, the temperature detection device 30 is disposed above the heated heating port 6. It is judged that it is not done. On the other hand, if the temperature difference ΔT_pro is larger than 30 ° C., that is, if the temperature change after the predetermined time has elapsed is larger than the allowable range, although the temperature detection device 30 is disposed above the heating port 6 being heated, There is no object to be heated in the container 10, and it is determined that the container 10 is in an empty state. Therefore, if the temperature difference ΔT_pro is not within the predetermined range, the heating is stopped and the determination result shown in FIG. 8 is notified.

  FIG. 9 is a flowchart showing a flow of sensor determination processing in the present embodiment. The processing is started by the device control unit 22 when the heating cooker 100 is powered on. In the present process, first, it is determined whether the automatic cooking mode is selected (S1). The automatic cooking mode is selected by pressing the automatic cooking mode of the operation unit 3 corresponding to the heating port 6 to be heated. Here, when the automatic cooking mode is not selected (S1: NO), the present process is ended. When the automatic cooking mode is not selected, the heating control according to the operation of the operation unit 3 is performed.

  On the other hand, when the automatic cooking mode is selected (S1: YES), a signal of state confirmation is transmitted from the device communication unit 21 to the temperature detection device 30 (S2). When the power supply of the temperature detection device 30 is in the on state, the sensor communication unit 331 receives a signal of state confirmation, and the sensor control unit 332 is configured to turn on the power via the sensor communication unit 331. Send back a signal indicating that it is.

  Then, it is determined by the device-side control unit 22 whether or not there is a response from the temperature detection device 30 indicating that the power is on (S3). Here, when there is no reply from the temperature detection device 30 indicating that the power is on (S3: NO), the device control unit 22 determines that the temperature detection device 30 has a communication failure or the power is turned on. It judges that there is no, and it notifies that the operation of automatic cooking mode is impossible by indicator 4 grade provided in cooking-by-heating machine 100 (S4). Note that this notification is not limited to the display by the display unit 4, and may be, for example, a buzzer or voice, and the notification content indicates that the temperature detection device 30 is not powered on or that a communication error has occurred. It may be a notification.

  After the notification, the device-side control unit 22 again sends a signal of state confirmation to the temperature detection device 30, and a reply is not obtained, and when repeated three times (S5: YES), the automatic cooking mode is not performed. , End this process. As described above, by confirming the state of the temperature detection device 30 before starting the heating control, it is necessary for the user that the temperature detection device 30 is not in the normal use state before the pan and the food are heated. I can tell you.

  On the other hand, when a signal indicating that the power is on is returned from the temperature detection device 30 (S3: YES), the detected temperature T_pro1 by the temperature detection device 30 is acquired as the initial temperature (S6). Then, heating by the heating coil 14 is started with a predetermined amount of power (W_A) (S7). Thereafter, it is determined whether a predetermined time has elapsed (S8), and if the predetermined time has not elapsed (S8: NO), heating with a predetermined amount of power (W_A) is continued. On the other hand, when the predetermined time has elapsed (S8: YES), the detected temperature T_pro2 after the predetermined time has elapsed by the temperature detection device 30 is acquired (S9). The detected temperature T_pro1 corresponds to the “first temperature” in the present invention, and the detected temperature T_pro2 corresponds to the “second temperature” in the present invention.

  Then, it is determined whether the difference ΔT_pro between the temperature T_pro2 and the temperature T_pro1 is within a predetermined range (S10). The predetermined range is, for example, an allowable range shown in FIG. And when difference deltaT_pro of temperature T_pro22 and temperature T_pro21 is in a predetermined range (S10: YES), heating control by automatic cooking mode is performed (S11). In the heating control in the automatic cooking mode, the sensor-side control unit 332 of the temperature detection device 30 transmits the temperature information detected by the temperature sensor 34 to the sensor-side communication unit 331, for example, in a one-second cycle. 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 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.

  On the other hand, if the difference ΔT_pro between the temperature T_pro22 and the temperature T_pro21 is not within the predetermined range (S10: NO), the heating is stopped (S12), and the determination result shown in FIG. (S13). The display unit 4 corresponds to the "notification unit" in the present invention.

  As described above, in the present embodiment, direct detection of the temperature of the container 10 by the temperature detection device 30 can improve the detection accuracy and the followability of the detection. As a result, highly accurate temperature control in the automatic cooking mode can be performed, cooking failure due to excessive temperature increase can be suppressed, and cooking suitable for food can be performed without the user performing a heating power change operation. Therefore, it is possible to improve the convenience and to suppress the temperature rise due to the blow-by and the air-burning, and the unnecessary heating can be suppressed.

  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 by which the mounting part 31 and the communication part 33 were integrally formed, and it uses for the pan of any shape. 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. Further, by providing the temperature detection device 30 between the container 10 and the top plate 2, the burn-in of the top plate 2 is also suppressed.

Second Embodiment
Next, a temperature detection device 30A according to a second embodiment of the present invention will be described. The temperature detection device 30A of the second embodiment is different from that of the first embodiment in that a capacitance detection unit 35 is provided. The other configuration of the temperature detection device 30A and the configuration of the heating cooker 100 are the same as those of the first embodiment, and are denoted by the same reference numerals.

  FIG. 10 is a plan view of a temperature detection device 30A of the present embodiment. As shown in FIG. 10, a capacitance detection unit 35 is provided in the placement unit 31 of the temperature detection device 30A. The electrostatic capacitance detection unit 35 is an electrode for detecting the electrostatic capacitance, and is disposed in an arc-shaped projection 312 formed in the same circular shape as the plurality of projections 311. The detection result of the capacitance detection unit 35 is output to the sensor side control unit 332 of the communication unit 33. The electrostatic capacitance detection unit 35 corresponds to the “placement detection unit” in the present invention.

  When nothing is placed on the placement unit 31 of the temperature detection device 30A, air having a relative dielectric constant of 1 mainly exists on the capacitance detection unit 35, so the static potential between the electrode and the reference potential is The capacitance is a small value. On the other hand, when the container 10 is placed on the placement unit 31, the capacitance between the electrode and the reference potential rapidly increases. When the capacitance detection unit 35 detects such a change in capacitance, the sensor-side control unit 332 determines that the container 10 has been placed on the temperature detection device 30A, and the sensor-side control unit 332 The placement information is sent in response to the request.

  FIG. 11 is a flowchart showing the flow of the sensor determination process by the device-side control unit 22 when the temperature detection device 30A is used. In the present embodiment, when the container 10 is placed on the temperature detection device 30A, it is determined that the temperature detection device 30A is disposed on the heating port 6. In FIG. 11, the same steps as in the embodiment 1 shown in FIG. 9 are denoted by the same reference numerals. In the present process, first, it is determined whether the automatic cooking mode is selected (S1). Then, when the automatic cooking mode is not selected (S1: NO), the present process is ended. On the other hand, when the automatic cooking mode is selected (S1: YES), a signal of state confirmation is transmitted from the device control section 22 to the temperature detection device 30A (S2).

  Then, it is determined by the device-side control unit 22 whether or not there is a response from the temperature detection device 30A indicating that the power is on (S3), and the power is turned on from the temperature detection device 30A. When there is no reply of the signal which shows (S3: NO), the information that operation of automatic cooking mode is impossible is performed (S4). After notification, the device-side control unit 22 again sends a signal of state confirmation to the temperature detection device 30A, and a reply is not obtained, and when repeated three times (S5: YES), the automatic cooking mode is not executed. , End this process.

  On the other hand, when a signal indicating that the power is on is returned from the temperature detection device 30A (S3: YES), the device-side control unit 22 requests the placement information from the temperature detection device 30. The placement information is acquired from the temperature detection device 30A (S21). The sensor-side control unit 332 that has received the request for the placement information sets placement information indicating whether the container 10 is placed on the temperature detection device 30A based on the detection result by the capacitance detection unit 35. It generates and transmits to the device control unit 22 via the sensor communication unit 331.

  When the placement information indicates that the container 10 is placed on the temperature detection device 30A (S22: YES), the temperature detection device 30A is disposed on the heating port 6 being heated. And heating is started (S23). And heating control by automatic cooking mode is performed (S11).

  On the other hand, when the placement information does not indicate that the container 10 is placed on the temperature detection device 30A (S22: NO), the temperature detection device 30A is disposed above the heating port 6 being heated. It is determined that there is not, and the determination result is notified using the display unit 4 (S24). Thereafter, the process ends without starting heating.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, it can be easily determined whether or not the temperature detection device 30A is disposed in the heating port 6. Further, since it is not necessary to perform heating for a predetermined time as in the first embodiment when determining the arrangement of the temperature detection device 30A, power consumption can be reduced, and the determination time can be shortened.

Third Embodiment
Next, a temperature detection device 30B according to a third embodiment of the present invention will be described. The temperature detection device 30B of the third embodiment is different from that of the first embodiment in that a weight detection unit 36 is provided. 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. 12 is a plan view of the temperature detection device 30B of the present embodiment. As shown in FIG. 12, a plurality of weight detection units 36 are provided in the placement unit 31 of the temperature detection device 30 </ b> B. The plurality of weight detection units 36 are disposed on the same circle as the plurality of protrusions 311 and in rectangular protrusions 313 alternately formed with the plurality of protrusions 311. In addition, although it has a structure provided with the three weight detection parts 36 in the mounting part 31 in FIG. 12, the number of weight detection parts 36 is not limited to this.

  The weight detection unit 36 is configured of, for example, a strain gauge, and detects a physical quantity such as a voltage value according to the weight (load). In addition, the weight detection part 36 is not limited to this, As long as it detects a weight, arbitrary components can be used. For example, a capacitive load sensor may be used. When the container 10 is placed on the placement unit 31, the load of the container 10 is applied to the weight detection unit 36, and the value detected by the weight detection unit 36 changes in accordance with the weight of the container 10. The detection result of the weight detection unit 36 is output to the sensor control unit 332. The sensor-side control unit 332 determines that the container 10 has been placed on the temperature detection device 30 when the amount of change in weight detected by the weight detection unit 36 is equal to or greater than a predetermined threshold. The placement information is sent in response to the request. As the above-mentioned predetermined threshold, for example, a value assumed in a case where a small pan is placed is set in advance. The weight detection unit 36 corresponds to the “placement detection unit” in the present invention.

  The flow of the sensor determination process by the device-side control unit 22 when the temperature detection device 30B is used is the same as that of the second embodiment shown in FIG. However, in the present embodiment, the placement information based on the detection result of the weight detection unit 36 is transmitted to the heating cooker 100.

  According to the present embodiment, in addition to the effects of the second embodiment, the determination accuracy of the placement of the container 10 can be improved. Specifically, in the present embodiment, when the placement portion 31 is touched based on the weight, when a person touches the placement portion 31 or something other than the container 10 (for example, a water droplet or the like) is the placement portion 31. In the case where the container 10 is placed, etc., it can be prevented that the container 10 is mistakenly determined to be placed.

Fourth Embodiment
Next, a temperature detection device 30C according to a fourth embodiment of the present invention will be described. The temperature detection device 30C in the fourth embodiment is different from the first embodiment in the shape of the mounting portion 31 and the arrangement of the temperature sensor 34. The other configuration of the temperature detection device 30C and the configuration of the heating cooker 100 are the same as those of the first embodiment, and are denoted by the same reference numerals.

  13 (a) is a plan view of the temperature detection device 30C, and FIG. 13 (b) is a side view of the temperature detection device 30C. As illustrated in FIG. 13A, the temperature detection device 30C has a planar shape like a pan and communicates with the placement unit 31C on which the container 10 is placed and the device communication unit 21. And a communication unit 33. Further, the placement unit 31C has a plurality of arm portions 314 radially extending in the radial direction from the center. FIG. 13A shows a configuration in which the placement unit 31C includes five arms 314, but the number of arms 314 is not limited to this.

  The protrusions 311 are formed on the five arms 314, respectively. Each protrusion 311 is disposed on the circumference of diameter D. Further, the communication unit 33 is connected to one of the plurality of arms 314. Then, on the arm 314 to which the communication unit 33 is connected, the plurality of protrusions 311 are arranged in a straight line in the radial direction. Although FIG. 13A shows a configuration in which three protrusions 311 are disposed, the number of protrusions 311 is not limited to this. The thickness t of the mounting portion 31C shown in FIG. 13 (b) is less than 5 mm as in the first embodiment, and the thickness of the protrusion 311 is, for example, 1 mm.

  Further, temperature sensors 34 are respectively disposed inside the protrusions 311 which are disposed in line in the radial direction. The temperature detected by each temperature sensor 34 is output to the communication unit 33 as in the first embodiment. By providing the temperature sensor 34 in the projection 311 formed on the arm 314 to which the communication unit 33 is connected, the temperature sensor 34 and the communication unit 33 can be easily connected. The number and arrangement of the protrusions 311 in the placement unit 31C and the number and arrangement of the temperature sensors 34 are not limited to the configuration shown in FIG. 13 and can be arbitrarily changed.

  Also in the present embodiment, when the container 10 is placed on the placement unit 31C, the bottom of the container 10 contacts the projection 311. Further, by providing the temperature sensor 34 in the protrusion 311 in close contact with the bottom of the container 10, the temperature sensor 34 contacts the bottom of the container 10, and the temperature of the container 10 can be detected with high accuracy. Furthermore, by disposing the temperature sensor 34 in the radial direction, the temperature distribution in the radial direction of the container 10 can be detected. In this case, the sensor side control unit 332 transmits the temperature information detected by the temperature sensor 34 to the heating cooker 100 in association with the position information in the radial direction of the temperature sensor 34. Thus, the device-side control unit 22 can grasp the temperature distribution in the radial direction of the container 10. Then, in the automatic cooking mode, temperature control in the radial direction can be performed, and convection can be generated in the container 10 and the like.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, more complicated temperature control becomes possible by detecting the temperature in the radial direction of the container 10, and various automatic cooking modes are provided. It can respond to cooking.

Embodiment 5
Next, a temperature detection device 30D and a heating cooker 100A according to a fifth embodiment of the present invention will be described. The fifth embodiment is different from the first embodiment in that power is supplied from the heating cooker 100A to the temperature detection device 30D by non-contact power feeding. About other composition of temperature sensing device 30D and cooking-by-heating machine 100A, it is the same as that of Embodiment 1, and attaches the same numerals.

  FIG. 14 is a diagram for explaining the configurations of a temperature detection device 30D and a heating cooker 100A in the present embodiment. As shown in FIG. 14, the communication unit 33D of the temperature detection device 30D is replaced with the power supply unit 333 and a power receiving coil 334 that receives power by electromagnetic induction and a charging unit 335 that is charged by the power received by the power receiving coil 334. And have. The power receiving coil 334 is, for example, a coil formed by winding a conducting wire, and the charging unit 335 is a storage battery such as a lithium secondary battery.

  Further, as shown in FIG. 14, the heating cooker 100A further includes a high frequency inverter 25 for feeding, and a feeding coil 26 to which a high frequency current is supplied from the high frequency inverter 25. The feed coil 26 is, for example, a coil formed by winding a conductive wire, and generates a high frequency magnetic field by being supplied with a high frequency current. As shown in FIG. 14, the feeding coil 26 is disposed below the top plate 2 and at a position different from the heating coil 14 in plan view. In addition, for example, an elliptical display indicating the place where the temperature detection device 30 is to be mounted is provided by printing or the like at a portion corresponding to the feeding coil 26 of the top plate 2, and the user mounts the temperature detection device 30. You will know where to put it.

  The heating cooker 100A in the present embodiment has a feeding mode in which a high frequency current of a preset frequency is supplied to the feeding coil 26, and a heating mode in which a high frequency current according to the set thermal power is supplied to the heating coil 14. doing. In the feeding mode, power is supplied from the feeding coil 26 to the receiving coil 334 by non-contact feeding. In the power feeding mode, first, the temperature detection device 30 is disposed on the top plate 2 by the user such that the power receiving coil 334 in the temperature detection device 30 and the power feeding coil 26 face each other. The device-side control unit 22 confirms that the temperature detection device 30D is powered on and that the temperature detection device 30D is placed on the heating port 6 by the same method (S2 to S10) as the sensor determination process. After that, the drive unit 23 is controlled to supply a high frequency current of a preset frequency to the feed coil 26. As a result, a high frequency magnetic field is generated in the feeding coil 26, and an electromotive force is generated in the power receiving coil 334 of the temperature detection device 30 by electromagnetic induction. Then, the charging unit 335 is charged by the high frequency current flowing to the power receiving coil 334.

  The sensor-side control unit 332 may detect the power reception state of the charging unit 335, and transmit information to the effect that the power reception state is from the sensor-side communication unit 331 to the device-side communication unit 21. Further, the sensor side control unit 332 detects the charge amount of the charge unit 335, and transmits information indicating the full charge from the sensor side communication unit 331 to the device side communication unit 21 when the predetermined charge amount is exceeded. You may

  The device-side control unit 22 stops the operation of the drive unit 23 when the time of the power supply operation exceeds the time set in advance, or when the information indicating the full charge is acquired from the sensor-side communication unit 331, the power supply operation is performed. Complete. Note that the display unit 4 may display information to the effect that storage of the temperature detection device 30 has ended.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, it is easy to obtain the watertight structure inside the communication unit 33 by driving the power supply of the temperature detection device 30 by non-contact power feeding. Therefore, the risk of short circuit failure due to washing and flooding of water can be reduced. In addition, since maintenance such as battery replacement is unnecessary, convenience for the user is also improved.

  As a modification of the present embodiment, the same high frequency inverter 24 may be used for the heating coil 14 and the feeding coil 26. In addition, the heating coil 14 may be shared by the heating application and the feeding application. In this case, there is no need to separately provide the high frequency inverter 25 for feeding or the feeding coil 26, and the configuration of the heating cooker 100A can be simplified. Furthermore, the device-side control unit 22 determines whether the object placed above the feeding coil 26 is the temperature detection device 30, and only when it is determined that the object is the temperature detection device 30, The feed mode may be started.

Sixth Embodiment
Next, a temperature detection device 30E according to a sixth embodiment of the present invention will be described. The temperature detection device 30E according to the sixth embodiment is different from the first embodiment in the shape of the placement unit 31E. 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. 15 is a diagram for explaining the configuration of the temperature detection device 30E according to the present embodiment. As illustrated in FIG. 15, the temperature detection device 30E includes a communication unit 33 and a placement unit 31E connected to the communication unit 33. The placement unit 31E has a triangular shape having an inclined surface 315 in a side view. Inside the mounting portion 31E, a temperature sensor 34 is disposed facing the inclined surface 315. The placement unit 31E is made of silicone rubber or the like having elasticity and heat resistance. The temperature detection device 30E is disposed such that the curved portion of the container 10 is placed on the inclined surface 315. Thereby, the temperature sensor 34 contacts the curved portion of the container 10, and the temperature of the container 10 can be directly detected. A magnet or the like may be provided on the placement unit 31 in order to bring the placement unit 31E into close contact with the container 10.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, downsizing of the temperature detection device 30E can be realized. In addition, since the temperature detection device 30E can be disposed after the container 10 is disposed at the heating port 6, usability is improved.

Embodiment 7
Next, a heating cooker 100B in the seventh embodiment will be described. The heating cooker 100B of the seventh embodiment is different from that of the first embodiment in that an infrared temperature sensor 27 and a contact-type temperature sensor 28 are provided. About the structure of the temperature detection apparatus 30, and the other structure of the heating cooker 100B, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 16 is a diagram for explaining the configuration and function of main parts of the heating cooker 100B in the present embodiment. As shown in FIG. 16, an infrared temperature sensor 27 is disposed below the top plate 2 of the heating cooker 100B. The infrared temperature sensor 27 detects infrared radiation emitted from the bottom of the container 10 placed on the top plate 2 on the heating coil 14. It is desirable that the immediate upper portion of the infrared temperature sensor 27 be a structure (for example, a cavity or a transmissive material) in which the infrared light is not shielded. The signal detected by the infrared temperature sensor 27 is output to the infrared temperature detection unit 270. The infrared temperature detection unit 270 A / D converts a detection signal from the infrared temperature sensor 27 and converts it into a temperature. The temperature information converted by the infrared temperature detection unit 270 is output to the device control unit 22.

  Further, on the surface of the back surface of the top plate 2 of the heating cooker 100 B opposite to the heating coil 14, a contact-type temperature sensor 28 such as a thermistor is disposed in contact with the back surface of the top plate 2. The contact-type temperature sensor 28 detects the heat transmitted from the container 10 to the top plate 2. The signal detected by the contact-type temperature sensor 28 is output to the contact-type temperature detection unit 280. The contact-type temperature detection unit 280 A / D converts a detection signal from the contact-type temperature sensor 28 and converts it into a temperature. The temperature information converted by the contact-type temperature detection unit 280 is output to the device-side control unit 22. The infrared temperature sensor 27 and the contact temperature sensor 28 correspond to the “second temperature sensor” in the present invention.

  The device-side control unit 22 according to the present embodiment performs a sensor determination process based on the temperature detected by the temperature detection device 30 and the temperature detected by the infrared temperature sensor 27 or the temperature detected by the contact-type temperature sensor 28. In addition, below, the case where sensor determination processing is performed using the detection temperature by the temperature detection apparatus 30 and the infrared temperature sensor 27 is demonstrated as a representative. The same flow applies to the case where the sensor determination process is performed using the temperatures detected by the temperature detection device 30 and the contact-type temperature sensor 28.

  FIG. 17 (a) is a graph showing an example of the transition of the detected temperature of the temperature detection device 30, and FIG. 17 (b) is a graph showing an example of the transition of the detected temperature of the infrared temperature sensor 27. (C) is a graph which shows an example of transition of the electric power supplied to the heating coil 14. As shown in FIG. Here, when the temperature detection device 30 is disposed above the heating port 6 being heated, the detection temperature of the temperature detection device 30 rises with the passage of time as shown in FIG. 17A. Then, when the temperature difference ΔT_pro after a predetermined time (Time_A) elapses falls within the allowable range, it is determined that the temperature detection device 30 is disposed above the heating port 6 being heated.

  Moreover, when the container 10 is arrange | positioned on the heating opening 6 currently heated, the temperature detected by the infrared temperature sensor 27 will rise with progress of time, as shown in FIG.17 (b). Then, when the temperature difference ΔT_ir after a predetermined time (Time_A) elapses falls within the allowable range, it is determined that the container 10 is disposed above the heating port 6 being heated.

  FIG. 18 is a table showing an example of a determination result based on temperature difference ΔT_pro and temperature difference ΔT_ir in the present embodiment and an operation according to the determination result. As shown in FIG. 18, when the temperature difference ΔT_pro is 15 ° C. or less and the temperature difference ΔT_ir is 10 ° C. or less, that is, when the temperature change after a predetermined time has elapsed is smaller than the allowable range, the heating port is heated. It is determined that the temperature detection device 30 is not disposed above 6.

  On the other hand, when the temperature difference ΔT_pro is larger than 30 ° C. and the temperature difference ΔT_ir is larger than 25 ° C., that is, the temperature change after a predetermined time elapses is larger than the allowable range, the temperature is detected above the heated heating port 6 Although the device 30 and the container 10 are disposed, it is determined that the container 10 has no object to be heated and is in an unburned state.

  Therefore, in the present embodiment, heating is continued only when both temperature difference ΔT_pro and temperature difference ΔT_ir are within the respective allowable range, and otherwise heating is stopped, and the determination result shown in FIG. To inform Thus, heating control in the automatic cooking mode can be performed only when both the temperature detection device 30 and the container 10 are appropriately disposed on the heating port 6 to be heated.

  FIG. 19 is a flowchart showing a flow of sensor determination processing in the present embodiment. In FIG. 19, the same steps as in the embodiment 1 of FIG. 9 are denoted by the same reference numerals. In the present process, first, it is determined whether the automatic cooking mode is selected (S1). Then, when the automatic cooking mode is not selected (S1: NO), the present process is ended. On the other hand, when the automatic cooking mode is selected (S1: YES), a signal of state confirmation is transmitted from the device communication unit 21 to the temperature detection device 30 (S2).

  Then, it is determined by the device-side control unit 22 whether or not there is a response from the temperature detection device 30 indicating that the power is on (S3), and the power is turned on from the temperature detection device 30. When there is no reply of the signal which shows (S3: NO), the information that operation of automatic cooking mode is impossible is performed (S4). After the notification, the device-side control unit 22 again sends a signal of state confirmation to the temperature detection device 30, and a reply is not obtained, and when repeated three times (S5: YES), the automatic cooking mode is not performed. , End this process.

  On the other hand, when a signal indicating that the power is on is returned from the temperature detection device 30 (S3: YES), the detection temperature T_pro1 detected by the temperature detection device 30, and detection by the infrared temperature sensor 27 as the initial temperature. The temperature T_ir1 is acquired (S31). Then, heating by the heating coil 14 is started with a predetermined amount of power (W_A) (S7). Thereafter, it is determined whether a predetermined time has elapsed (S8), and if the predetermined time has not elapsed (S8: NO), heating with a predetermined amount of power (W_A) is continued. On the other hand, when the predetermined time has elapsed (S8: YES), the detected temperature T_pro2 by the temperature detecting device 30 after the predetermined time has elapsed and the detected temperature T_ir2 by the infrared temperature sensor 27 are acquired (S32). The detected temperature T_ir1 corresponds to the “third temperature” in the present invention, and the detected temperature T_ir2 corresponds to the “fourth temperature” in the present invention.

  Then, it is determined whether the temperature difference ΔT_pro between the temperature T_pro2 and the temperature T_pro1 and the temperature difference ΔT_ir between the temperature T_ir2 and the temperature T_ir1 are within the respective allowable range (S33). Then, when the temperature differences ΔT_pro and ΔT_ir are within the respective allowable ranges (S33: YES), heating control in the automatic cooking mode is executed (S11). On the other hand, if both or either of the temperature differences ΔT_pro and ΔT_ir are not within the allowable range (S33: NO), the heating is stopped (S12), and the determination result shown in FIG. 18 is notified (S13).

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, the accuracy of the sensor determination process can be achieved by using the temperature detected by the infrared temperature sensor 27 or the contact-type temperature sensor 28 of the heating cooker 100B. And reliability can be improved.

Eighth Embodiment
Next, a heating cooker 100C according to an eighth embodiment will be described. The heating cooker 100C of the eighth embodiment is different from that of the first embodiment in that the container 10 is heated by a plurality of heating coils 140. About the structure of the temperature detection apparatus 30, and the other structure of 100 C of heating cookers, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 20 is a perspective view of a heating cooker 100C in the present embodiment. As shown in FIG. 20, below the top plate 2 of the heating cooker 100C, a plurality of heating coils 140 are disposed in the depth direction and in the lateral direction. In FIG. 20, the arrangement of the heating coil 140 is illustrated by a broken line. In Embodiment 1, the container 10 placed on the heating port 6 of the top plate 2 is configured to be heated by one heating coil 14 corresponding to the heating port 6, but in the present embodiment, The container 10 placed at an arbitrary position on the top plate 2 is heated by the plurality of heating coils 140.

  On the top surface of the top plate 2, an operation display unit 7 configured of, for example, a capacitive touch sensor is provided. The operation display unit 7 is an area for performing an operation for heating setting of the container 10 placed on the top plate 2 and is an area for displaying the container 10 to be operated. FIG. 21 shows a display example of the operation display unit 7 of the heating cooker 100C in the present embodiment. FIG. 21 shows an example where three containers 10 are placed on the top plate 2. As shown in FIG. 21, the container 10 placed on the top plate 2 is displayed in a circle on the operation display unit 7. Then, one of the containers 10 is selected as the operation target on the operation display unit 7 by the user, and thereafter, an operation such as heating setting for the selected container 10 is performed.

  Next, the heating operation of the heating cooker 100C in the present embodiment will be described. Drawing 22 is a flow chart which shows heating operation by apparatus side control part 22 of cooking-by-heating machine 100C. As shown in FIG. 22, in the present embodiment, it is first determined which heating coil 140 the container 10 is disposed on (S41). Here, first, a high frequency current of a predetermined frequency is supplied to each of the plurality of heating coils 140. When the container 10 is placed on the heating coil 140, the impedance viewed from the heating coil 140 is increased, so the current flowing to the heating coil 140 is reduced. Therefore, the device-side control unit 22 detects the current flowing through the heating coil 140 and compares the detected current value with a threshold to determine whether the container 10 is placed on the heating coil 140 or not. Do.

  Subsequently, based on the determination result of step S41, it is determined whether the container 10 is present on the top plate 2 (S42). Here, when there is no container 10 on the top plate 2 (S42: NO), it is informed that the container 10 is not disposed (S43). And after alerting | reporting, position determination of the container 10 is performed again, and when it repeats 3 times, without the container 10 being detected (S44: YES), this process is complete | finished, without performing heating operation.

  On the other hand, when the container 10 is present on the top plate 2 (S42: YES), the position of the container 10 to be heated is displayed on the operation display unit 7 (S45). Then, among the plurality of heating coils 140, the heating coil 140 determined in step S41 that the container 10 is placed is specified as the heating coil to be heated (S46).

  Thereafter, the user performs selection and heating setting of the container 10 displayed on the operation display unit 7, and the sensor determination process is performed (S47). In step S47, the sensor determination process according to any one of the first, second, or seventh embodiments shown in FIG. 9, FIG. 11, or FIG. 19 is performed. However, in the sensor determination process, heating control is performed on the heating coil 140 specified in step S46.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, infrared rays for detecting the temperature of the container 10 in each of the plurality of heating coils 140 by using the temperature detection device 30 There is no need to provide the temperature sensor 27 or the contact-type temperature sensor 28. In particular, in the case where a large number of heating coils 140 are provided as in the present embodiment, using the temperature detection device 30 can significantly reduce the number of parts and the product cost.

  As mentioned above, although embodiment of this invention was described with reference to drawings, the specific structure of this invention is not restricted to this, It can change in the range which does not deviate from the summary of invention. For example, in the above-described second and third embodiments, although the temperature detection device includes the capacitance detection unit 35 or the weight detection unit 36 and determines the presence or absence of the container 10, the placement detection of the present invention The part is not limited to these. For example, the presence or absence of the container 10 may be determined using a photosensor having a light emitting element and a light receiving element.

  Further, the configurations in the first to eighth embodiments can be combined as appropriate. For example, the sensor determination process (FIG. 9) of the first embodiment may be combined with the sensor determination process (FIG. 11) of the second embodiment. Specifically, in addition to the placement determination by the capacitance detection unit 35 of the temperature detection device 30A, the placement determination based on the temperature difference ΔT_pro due to heating for a predetermined time may be performed. Further, the sensor determination process (FIG. 11) of the second embodiment may be combined with the sensor determination process by the infrared temperature sensor 27 or the contact temperature sensor 28 according to the seventh embodiment. In this case, when the placement information indicates the placement of the container 10 and the temperature difference ΔT_ir of the temperature detected by the infrared temperature sensor 27 is within the allowable range, the heating control of the automatic cooking mode is started. By performing the determination as described above, the reliability can be improved.

  Although the case where one container 10 and one temperature detection device 30 are mounted on the top plate 2 has been described in the above embodiment, a plurality of containers 10 and a plurality of temperature detection devices are provided on the top plate 2. 30 may be placed. In this case, each temperature detection is performed by the device-side control unit 22 of the heating cooker 100 by providing unique identification information to the temperature detection device 30 and transmitting the identification information from the sensor control unit 332 to the heating cooker 100. An identification of the device 30 can be made.

  Further, when the plurality of containers 10 and the plurality of temperature detection devices 30 are placed on the top plate 2 and the plurality of heating coils 14 simultaneously become heating targets, which temperature detection device 30 corresponds to which heating coil 14 It is necessary to determine what to do. In this case, the relative position between the temperature detection device 30 and the heating coil 14 can be specified by shifting the power application timing to each heating coil 14 in the sensor determination process. FIG. 23 is a flowchart showing the flow of the sensor determination process in the first modification. This process is a sensor process when a plurality of temperature detection devices 30 simultaneously become heating targets. In this process, first, as in the first embodiment, it is determined whether the automatic cooking mode is selected (S101). Here, when the automatic cooking mode is not selected (S101: NO), this process is ended.

  On the other hand, when the automatic cooking mode is selected (S101: YES), the device communication unit 21 transmits a state confirmation signal to the plurality of temperature detection devices 30 (S102). Then, it is determined whether or not there is a response from the temperature detection device 30 indicating that the power is on (S103). Here, when there is no reply from any of the temperature detection devices 30 indicating that the power is on (S103: NO), the display unit 4 or the like provided in the heating cooker 100 is in the automatic cooking mode. Notification that the operation is not possible is performed (S104). Then, after notification, a signal of state confirmation is sent to the temperature detection device 30 again, and when no reply is obtained and repeated three times (S105: YES), the present processing is ended without executing the automatic cooking mode. Do.

  On the other hand, when there is a response from any of the temperature detection devices 30 indicating that the power is on (S103: YES), the temperature detection device 30 whose power is on is specified (S106) . Here, based on the identification information of the temperature detection device 30, the temperature detection device 30 whose power is on is identified. And detection temperature T_pro1 by each temperature detection apparatus 30 specified by step S106 is acquired as initial temperature (S107). Then, heating by one of the plurality of heating coils 14 to be heated is started with a predetermined amount of power (W_A) (S108). Thereafter, it is determined whether a predetermined time has elapsed (S109), and if the predetermined time has not elapsed (S109: NO), heating with a predetermined amount of power (W_A) is continued. On the other hand, when the predetermined time has elapsed (S109: YES), the detected temperature T_pro2 after the predetermined time has elapsed by each temperature detection device 30 is acquired (S110).

  Then, it is determined whether the temperature difference ΔT_pro of each temperature detection device 30 is within a predetermined range (S111). Then, when the temperature difference ΔT_pro of any of the temperature detection devices 30 is within the predetermined range (S111: YES), the relative position between the temperature detection device 30 and the heating coil 14 is specified (S112). Specifically, it is determined that the temperature detection device 30 having the temperature difference ΔT_pro within the predetermined range is placed on the heating coil 14 heated in step S108. And heating control by automatic cooking mode is performed to the heating coil concerned (S113), and it progresses to Step S116.

  On the other hand, if the temperature difference ΔT_pro of any of the temperature detection devices 30 is not within the predetermined range (S111: NO), the heating is stopped (S114), and the determination result similar to that of the first embodiment using the display unit 4 Is notified (S115). Then, it is determined whether or not the processing after step S108 has been performed on all of the plurality of heating coils 14 to be heated (S116). And when processing after Step S108 is not performed to all a plurality of heating coils 14 which are heating targets (S116: NO), it returns to Step S108, and the next heating coil 14 and subsequent ones. The process is repeated. On the other hand, when the process after step S108 is performed with respect to all the several heating coil 14 used as heating object (S116: YES), this process is complete | finished.

  When the temperature detection device 30 is provided with the power reception coil 334 as in the fifth embodiment, the relative position relationship between the temperature detection device 30 and the heating coil 14 is determined using the power reception coil 334. May be FIG. 24 is a flowchart showing the flow of the sensor determination process in the second modification. In this process, the processes of steps S101 to S106 are performed as in the first modification shown in FIG. Then, when the temperature detection device 30 whose power is on is specified (S106), a high frequency current of a predetermined frequency is supplied to one of the plurality of heating coils 14 to be heated (S106). S121).

  Then, secondary current information flowing to the power receiving coil 334 is acquired from the plurality of temperature detection devices 30 (S122). Here, in the temperature detection device 30 in the vicinity of the heating coil 14 to which a high frequency current of a predetermined frequency is supplied, a secondary current is generated in the power receiving coil 334. Therefore, based on the acquired secondary current information, it is determined whether the temperature detection device 30 is present on the heating coil 14 (S123). Then, when the temperature detection device 30 is present on the heating coil 14 (S123: YES), the relative position between the temperature detection device 30 and the heating coil 14 is specified (S124). Then, heating is started (S125), and heating control in the automatic cooking mode is performed (S126).

  On the other hand, when there is no temperature detection apparatus 30 on the heating coil 14 (S123: NO), a determination result is alert | reported using the display part 4 (S127). It is judged whether the process after step S121 was performed with respect to all the several heating coil 14 used as heating object (S116). And when processing after Step S121 is not performed to all the plurality of heating coils 14 which are heating targets (S116: NO), it returns to Step S121, and the following heating coil 14 is processed thereafter. The process is repeated. On the other hand, when the process after step S121 is performed with respect to all the several heating coil 14 used as heating object (S116: YES), this process is complete | finished.

  The above-described first and second modifications can also be applied to the heating cooker 100C of the eighth embodiment. In the second modification, instead of supplying high frequency current to each heating coil 14 in order, the cycle is changed to each heating coil 14 and high frequency current of a predetermined frequency is supplied in a pulse shape, and a secondary current flows to the power receiving coil 334 The relative positional relationship between the temperature detection device 30 and the heating coil 14 may be determined based on the information.

  Reference Signs List 1 main body, 2 top plate, 3 operation unit, 3a front operation unit, 3b fire power setting key, 3c menu key, 4 display unit, 5 fire power display unit, 6 heating port, 7 operation display unit, 10 containers, 14, 140 heating Coil, 14a inner heating coil, 14b outer heating coil, 21 device side communication unit, 22 device side control unit, 23 drive unit, 24, 25 high frequency inverter, 26 feeding coil, 27 infrared temperature sensor, 28 contact temperature sensor, 30 , 30A, 30B, 30C, 30D, 30E Temperature detection device 31, 31C, 31E mounting portion, 31a opening, 32 connection portion, 33, 33D communication portion, 34 temperature sensor, 35 capacitance detection portion, 36 weight detection Part, 100, 100A, 100B, 100C Heating cooker, 270 Infrared temperature detection part, 280 Contact type temperature detection , 311, 312, 313 protrusion, 314 arm, 315 inclined surface, 330 housing, 330a upper surface, 330b main body, 331 sensor side communication unit, 332 sensor side control unit, 333 power supply unit, 334 power receiving coil, 335 charge Department.

Claims (7)

A mounting portion which is separately disposed on the top plate of the induction heating cooker and on which the bottom of the container in which the object to be heated is stored is mounted;
A plurality of resilient projections formed on the surface of the placement unit on which the container is placed;
A first temperature sensor disposed inside at least one of the plurality of protrusions and detecting a temperature of a bottom of the container;
A first communication unit connected to the placement unit and transmitting temperature information detected by the first temperature sensor;
The thickness of the mounting section prior to including said plurality of projections Ri der less than 5 mm,
Wherein the plurality of protrusions, when the container is placed, which in close contact with the bottom of the container, thereby the contact area between the container and the placement section is characterized that you increase Temperature sensing device.   The temperature detection device according to claim 1, wherein the first communication unit is disposed outside the placement unit in a plan view in use.   The temperature detection device according to claim 1, wherein the plurality of protrusions are formed side by side on the same circle. The plurality of protrusions are formed in a straight line,
The temperature detection device according to claim 1, wherein the first temperature sensor is disposed on each of the plurality of protrusions.   The temperature detection device according to any one of claims 1 to 4, wherein the placement portion and the plurality of protrusions are formed of silicone rubber.   The temperature detection device according to any one of claims 1 to 5, wherein the heights of the plurality of protrusions are 1 mm. The temperature detection device according to any one of claims 1 to 6,
A top plate on which the container and the temperature detection device are mounted;
A heating unit for heating the container;
A second communication unit that receives the temperature information transmitted from the temperature detection device;
A control unit configured to control the heating unit based on the temperature information received by the second communication unit;
A heating cooker characterized by comprising.

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