WO2011155200A1 - Dispositif de cuisson par induction - Google Patents

Dispositif de cuisson par induction Download PDF

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Publication number
WO2011155200A1
WO2011155200A1 PCT/JP2011/003244 JP2011003244W WO2011155200A1 WO 2011155200 A1 WO2011155200 A1 WO 2011155200A1 JP 2011003244 W JP2011003244 W JP 2011003244W WO 2011155200 A1 WO2011155200 A1 WO 2011155200A1
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WIPO (PCT)
Prior art keywords
heating
burn
time
pan
output
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PCT/JP2011/003244
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English (en)
Japanese (ja)
Inventor
輝雄 林中
新太郎 野口
史太佳 小笠原
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パナソニック株式会社
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Priority to JP2012519258A priority Critical patent/JPWO2011155200A1/ja
Publication of WO2011155200A1 publication Critical patent/WO2011155200A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the present invention relates to an induction heating cooker having a scoring detection function.
  • the induction heating cooker described in Patent Document 1 includes a scorching detection unit that stops cooking when the temperature at the bottom of the pan rises to a predetermined value or more during cooking. Therefore, it is possible to prevent the liquid from running out during cooking and cooking from scorching the pan.
  • JP 2001-357968 A JP 2001-357968 A.
  • the object of the present invention is to solve the above problems, and to provide an induction heating cooker that is easy to use as compared with the prior art that prevents the heating output from being suppressed more quickly than necessary and prevents the degree of scorching from becoming worse. It is to provide.
  • An induction heating cooker includes a top plate on which a pan is placed, an induction heating coil that is provided below the top plate and induction-heats the pan, and an inverter that supplies a high-frequency current to the induction heating coil A circuit, an infrared sensor for detecting infrared radiation radiated from the bottom of the pan and passing through the top plate and outputting an output voltage corresponding to the bottom temperature of the pan, and heating from one of a plurality of heating output set values An output setting unit for selecting an output set value, and a high frequency current is supplied to the induction heating coil, and the operation of the inverter circuit is controlled so that the heating output becomes a heating output corresponding to the selected heating output set value.
  • the burned information signal indicating that the cooked food has started to burn on the bottom of the pan.
  • a scoring detection unit that outputs to the control unit, and a timer unit that starts a scoring time in response to the scoring information signal and outputs a scoring time signal indicating the scoring time measured to the control unit;
  • the control unit prohibits controlling the inverter circuit in response to the burn information signal when the burn time measured by the timing unit is less than a predetermined burn standby time, When the burning time measured by the unit is equal to or longer than a predetermined burning standby time, the inverter circuit is controlled to stop the heating operation or reduce the heating output.
  • cooking is performed in a normal heating mode in which the heating output set value can be changed without imposing a predetermined operation such as selection of a specific cooking mode or selection of a predetermined function for preventing burning.
  • a burn detection function (a function for controlling an inverter circuit in response to a burn information signal) can be used.
  • the scorching detection function during cooking is contrary to the user's intention. None stop heating.
  • the induction heating cooker of the present invention prohibits controlling the inverter circuit in response to the burn information signal when the burn time timed by the timing unit is less than the predetermined burn standby time, the specific cooking mode
  • the burnout detection function can be used even when cooking in the normal heating mode in which the heating output set value can be changed without imposing a predetermined operation on the user such as selection of a predetermined function or prevention of burning It is.
  • heating is not stopped at an earlier timing than necessary against the user's intention during cooking.
  • it can detect burnt and automatically stop heating or reduce the heating output so that the burnt state does not deteriorate. Can be improved.
  • FIG. 3 is a circuit diagram showing configurations of a rectifying / smoothing circuit 93 and an inverter circuit 8 in FIG. 2.
  • It is a flowchart which shows the heating process performed by the control part 9 of FIG.
  • It is a flowchart which shows the burning detection process performed by the burning detection part 13 of FIG.
  • a first invention includes a top plate on which a pan is placed, an induction heating coil that is provided under the top plate and induction-heats the pan, an inverter circuit that supplies high-frequency current to the induction heating coil, and a bottom of the pan
  • An infrared sensor that detects infrared rays that are radiated and transmitted through the top plate and outputs an output voltage corresponding to the bottom temperature of the pan; an output setting unit that selects one heating output setting value from a plurality of heating output setting values;
  • a control unit for controlling the operation of the inverter circuit so as to supply a high-frequency current to the induction heating coil and the heating output corresponding to the selected heating output set value; and an output voltage of the infrared sensor When the output voltage is equal to or higher than one output voltage, a burnt detection unit that generates a burnt information signal indicating that the food has started to burn on the bottom of the pan and outputs the burnt information signal to the control unit; And a timer for outputting a
  • the inverter circuit When it is less than the time, it is prohibited to control the inverter circuit in response to the burn-in information signal, while when the burn-in time measured by the timer is longer than the burn-in standby time, the heating operation is stopped or the heating output is turned off.
  • the inverter circuit is controlled so as to be lowered.
  • cooking is performed in a normal heating mode in which the heating output set value can be changed without imposing a predetermined operation such as selection of a specific cooking mode or selection of a predetermined function for preventing burning.
  • a scoring detection function is also available.
  • the scorch detection function can be used accurately without stopping the heating against the user's intention by the scorch detection function during cooking.
  • the second invention is characterized in that, in particular, in the first invention, the control unit sets a burning standby time based on the selected heating output setting value.
  • the third invention is characterized in that, in particular, in the second invention, the control unit sets the burning standby time so that the burning standby time becomes longer as the selected heating output setting value is smaller. .
  • the heating output set value is changed during cooking, for example, it is possible to apply an appropriate burn in cooking of boiled food that wants to be burnt, and a function to detect burns against the user's intention during cooking is provided.
  • the burn-in detection function can be used accurately without any trouble in working cooking.
  • the burn-in detection unit is configured so that the first output voltage increases as the selected heating output setting value increases.
  • the output voltage is set.
  • the heating output setting value is changed during cooking, for example, it is possible to apply an appropriate burn in boiled cooking that wants to be burnt, and a burn detection function that is contrary to the user's intention during cooking
  • the burn detection function can be used accurately without causing trouble in cooking. Furthermore, even when the cooked product is scorched in low heat cooking or the like, even if the pan bottom temperature does not rise so much, heating can be stopped by scoring detection before scoring becomes serious.
  • the control unit when the selected heating output setting value is equal to or greater than a predetermined heating output setting value, the control unit counts time by the timing unit. Controlling the inverter circuit so as to stop the heating operation or lower the heating output when the burned time is equal to or longer than a predetermined burn-in waiting time is characterized.
  • the scoring detection function can be used accurately without performing scoring detection.
  • control unit has a predetermined state in which the output voltage is less than the first output voltage after the burned information signal is generated.
  • the timer is controlled so as to initialize the burning time when it continues for more than a time.
  • the scorching is not detected before cooking, which is contrary to the intention of the user.
  • the scoring detection function can be used accurately without detecting scorching during cooking and stopping heating.
  • a measurement unit that measures an input current input to the inverter circuit and a resonance voltage of the inverter circuit, a measured input current
  • a panless detector that determines whether there is a pan on the top plate based on the resonance voltage, and the controller detects that there is no pan on the top plate by the panless detector
  • the timekeeping unit is controlled to initialize the burn time.
  • the panless detector is configured such that the difference between the measured input current and the preset current value, and the measured resonance voltage and the preset voltage. Based on the difference from the value, it is determined whether or not there is a pan on the top plate.
  • the burn-in detection function can be used accurately.
  • the first output voltage is set to an output voltage corresponding to a temperature at which the food starts to burn on the bottom of the pan.
  • FIG. 1 is a perspective view showing the configuration of the induction heating cooker according to the first embodiment of the present invention.
  • a top plate 2 made of an electrical insulator such as glass and transmitting infrared rays is provided on an upper portion of an outer case 1.
  • the top plate 2 is provided with an induction heating unit 3 that induction-heats the pan 12 that is a cooking container by induction heating, and a radial heater unit 4 that heats a nonmetallic pan or the like by radiant heat.
  • a grill 5 for grilling fish and the like, and an operation display unit 6 for operating each heat source and displaying the state of each heat source are provided on the side surface of the outer case 1.
  • the induction heating cooker is (A) the top plate 2 on which the pan 12 is placed; (B) an induction heating coil 7 provided under the top plate 2 and for induction heating the pan 12; (C) an inverter circuit 8 for supplying a high-frequency current to the induction heating coil 7; (D) an infrared sensor 11 that detects infrared rays radiated from the bottom of the pan 12 and transmits the top plate 2 and outputs an output voltage VT corresponding to the bottom temperature of the pan 12; (E) an output setting unit 10 that selects one heating output setting value WH from a plurality of heating output setting values; (F) a control unit 9 that supplies a high-frequency current to the induction heating coil 7 and controls the operation of the inverter circuit 8 so that the heating output becomes a heating output corresponding to the selected heating output set value WH; (G) When the output voltage VT of the infrared sensor 11 is equal to or higher than the predetermined output voltage V1,
  • control unit 9 prohibits the control of the inverter circuit 8 in response to the burning information signal SB when the burning time measured by the timing unit 15 is less than a predetermined burning standby time, while the timing unit When the burning time counted by 15 is equal to or longer than the burning standby time, the inverter circuit 8 is controlled to stop the heating operation or lower the heating output.
  • FIG. 2 is a block diagram showing a configuration of the induction heating unit 3 of FIG.
  • the induction heating unit 3 includes an induction heating coil 7 (hereinafter referred to as a heating coil 7) provided below the top plate 2, an infrared sensor 11, an inverter circuit 8, a commercial AC power supply 91, A rectifying / smoothing circuit 93, a rectifying / smoothing circuit 93, a timer unit 15, a measuring unit 16 including an input current detecting circuit 16c and a resonance voltage detecting circuit 16v, a burnout detecting unit 13, and a control unit 9 are configured. Is done.
  • the operation display unit 6 includes a heating start switch 6 s and an output setting unit 10.
  • the heating start switch 6s is provided for the user to instruct the induction heating unit 3 to start heating, and when operated by the user, outputs a signal indicating the start of heating to the control unit.
  • the output setting unit 10 is provided for the user to select the heating output setting value of the induction heating coil 7 from a plurality of heating output setting values, and controls the heating output setting value WH selected by the user. To the unit 9.
  • the infrared sensor 11 is made of an InGaAs pin photodiode or the like, and is provided in the vicinity of the heating coil 7 below the top plate 2.
  • the infrared sensor 11 detects the amount of infrared rays that are radiated from the bottom of the pan 12 that is a cooking vessel and passes through the top plate 2, and outputs the output voltage VT corresponding to the bottom temperature of the pan 12 based on the detected amount of infrared rays. Generated and output to the control unit 9 and the burning detection unit 13.
  • FIG. 5 is a flowchart showing the burn detection process executed by the burn detection unit 13 of FIG.
  • step S60 of FIG. 5 the burn detection unit 13 determines whether or not the output voltage VT is equal to or higher than a predetermined output voltage V1, and proceeds to step S61 if YES, while processing in step S60 if NO. Execute repeatedly.
  • step S61 the burn detection unit 13 outputs a burn information signal SB indicating that the pan 12 has burned to the control unit 9 and the time measuring unit 15, and ends the burn detection process.
  • the output voltage V1 is set to a temperature at which the food 14 starts to burn on the pan 12 when the food 14 having a relatively high viscosity such as curry is boiled (that is, when the cooking content is boiled).
  • the corresponding output voltage VT is set.
  • the timing unit 15 initializes the burn time to zero based on the control from the control unit 9, and measures the burn time in response to the burn information signal 13 from the burn detection unit 13. Start. Then, a burn time signal ST indicating the burned time measured is output to the control unit 9.
  • FIG. 3 is a circuit diagram showing the configuration of the rectifying / smoothing circuit 93 and the inverter circuit 8 of FIG.
  • a rectifying / smoothing circuit 93 includes a diode bridge circuit and full-wave rectifies an AC voltage from a commercial AC power supply 91 to convert it into a DC voltage, and a first output of the full-wave rectifier 94.
  • a choke coil 95 having one end connected to the terminal, and a smoothing capacitor 96 having one end connected to the second output terminal of the full-wave rectifier 94 and the other end connected to the other end of the choke coil 95. Configured.
  • the choke coil 95 and the smoothing capacitor 96 constitute a low-pass filter.
  • the inverter circuit 8 is connected between a resonance capacitor 81 having one end connected to each other end of the choke coil 95 and the smoothing capacitor 96, and between the other end of the smoothing capacitor 96 and the other end of the resonance capacitor 81.
  • the switching element 83 includes a switching element 83 and a diode 82 connected in antiparallel to the switching element 83.
  • the heating coil 7 is connected to the resonance capacitor 81 in parallel.
  • an input current detection circuit 16 c is, for example, a current transformer (CT (Current Transformer)), and is provided between the commercial AC power supply 91 and the full-wave rectifier 94. An input current to the circuit 93 is detected.
  • the resonance voltage detection circuit 16v is a measurement transformer (VT (Voltage Transformer)), for example, and detects the resonance voltage of the resonance capacitor 81 (see FIG. 3) of the inverter circuit 8.
  • the measurement unit 16 outputs a signal indicating the detected input current and resonance voltage to the control unit 9.
  • the control part 9 is the heating output from which the heating output was selected by the output setting part 10 based on the detected input current and the resonance voltage in the heating mode in which the user can change the heating output set value WH.
  • the switching element 83 is on / off controlled so as to obtain a heating output corresponding to the set value WH.
  • a high-frequency current flows through the heating coil 7.
  • control unit 9 performs the heating operation in the heating mode described above, and also uses the burn information signal SB from the burn detection unit 13 and the burn time signal ST from the timing unit 15 to perform the heating in FIG. 4. Execute the process.
  • FIG. 4 is a flowchart showing the heating process executed by the control unit 9 of FIG.
  • step S10 of FIG. 4 when the power of the induction heating cooker is turned on, the control unit 9 sets the operation mode to the standby mode. In the standby mode, the control unit 9 stops the heating operation for on / off control of the switching element 83. In the standby mode, the user can operate the heating start switch 6 s and set the heating output set value WH by the output setting unit 10.
  • step S11 the controller 9 determines whether or not the heating start switch 6s has been operated. If YES, the process proceeds to step S12. If NO, the process of step S11 is repeated.
  • step S12 the control part 9 starts the heating operation in heating mode, controls the infrared sensor 11 to start the output of the output voltage VT corresponding to the temperature of the pan 12, and performs a burning detection process.
  • the burn-in detection unit 13 is controlled as described above, and the timer unit 15 is controlled so that the burn-in time is initialized to zero.
  • the infrared sensor 11 starts outputting the output voltage VT corresponding to the temperature of the pan 12.
  • the infrared sensor 11 always outputs the output voltage VT to the control unit 9 at least during the heating operation.
  • the burn-in detection unit 13 executes the burn-in detection process shown in FIG. 5, and the timer unit 15 initializes the burn-in time to zero.
  • step S13 the control unit 9 determines whether or not the burning time included in the burning time signal ST from the time measuring unit 15 is equal to or longer than a predetermined burning time. If YES, the process proceeds to step S14. On the other hand, if NO in step S13, the process proceeds to step S16, and the control unit 9 prohibits the control of the inverter circuit 8 in response to the burned information signal SB, continues the heating operation, and returns to step S13.
  • the burn detection unit 13 outputs a burn information signal SB to the timer unit 15. In response to this, the timer unit 15 starts measuring the burning time.
  • step S13 If the measured burn time is equal to or longer than the burn waiting time, YES is determined in the determination process in step S13, and the control unit 9 determines in step S14 that the food 14 has burned to the bottom of the pan 12.
  • step S15 the inverter circuit 8 is controlled so as to stop the heating operation or reduce the heating output, and the heating process is terminated.
  • the content of the process in step S15 is determined by the extent of the damage which the pan 12 receives by scoring based on the heating output setting value WH.
  • FIG. 6 is a graph showing the relationship between the elapsed time from the start of heating to the stop of heating or the decrease in heating output and the output voltage VT from the infrared sensor 11.
  • the output voltage V1 is set to the output voltage VT corresponding to the temperature at which the food 14 starts to burn on the pan 12 when the cooking content by the induction heating cooker is boiled food.
  • the burn-in standby time is set to a time (for example, 5 minutes) until the cooked product 14 is burnt with a predetermined degree after the cooked product 14 starts to burn.
  • the output voltage VT starts to rise after transitioning to a constant value.
  • the burn-in detection unit 13 When the output voltage VT reaches the output voltage V1 at the timing T1, the food 14 starts to burn on the pan 12.
  • the burn-in detection unit 13 outputs a burn-in information signal SB to the timer unit 15, and in response to this, the timer unit 15 starts counting the burn-in time.
  • the output voltage VT also increases after timing T1.
  • the control unit 9 stops the heating operation or reduces the heating output.
  • the heating operation is stopped or the heating output is reduced after the burning standby time has elapsed from the timing when the burning detection information signal SB is output.
  • the charcoal detection function This is a function of controlling the inverter circuit 8 in response to the burned information signal SB.
  • the detection function is available.
  • the scorching detection function does not stop heating against the user's intention by the scoring detection function.
  • the detection function can be used.
  • FIG. 7 and 8 are flowcharts showing the heat treatment according to the second embodiment of the present invention.
  • the processes in steps S10 to S12 are the same as the processes in steps S10 to S12 of the heating process (see FIG. 4) according to the first embodiment, and a description thereof will be omitted.
  • step S21 the control unit 9 determines whether or not the heating output set value WH is 2000 W or more.
  • step S26 the control unit 9 prohibits the control of the inverter circuit 8 so as to stop the heating operation or lower the heating output when the burning time counted by the timing unit 15 is equal to or longer than the burning standby time.
  • the heating operation is continued (ie, without performing the process of step S15), and the process proceeds to step S41.
  • step S41 the control unit 9 determines whether or not the heating output set value WH has been changed. When YES, the process returns to step S21, and when NO, the process of step S41 is repeated.
  • step S22 of FIG. 7 the control unit 9 determines whether or not the burnt information signal SB is input from the burnt detection unit 13, and proceeds to step S23 if YES, while performing the process of step S22 if NO. Run repeatedly.
  • step S23 the control unit 9 determines the burn-in standby time based on the heating output set value WH. Specifically, the control unit 9 sets the burning standby time so that the burning standby time becomes longer as the heating output set value WH is smaller.
  • step S13 of FIG. 8 the control unit 9 determines whether or not the burning time included in the burning time signal ST from the time measuring unit 15 is equal to or longer than a predetermined burning time. If YES, the process proceeds to step S14.
  • step S16 the controller 9 prohibits the control of the inverter circuit 8 in response to the burned information signal SB, continues the heating operation, and proceeds to step S24. Further, in step S24, it is determined whether or not the state in which the output voltage VT is less than the output voltage V1 has continued for a predetermined time (time period) or more. If YES, the process proceeds to step S25. Return to S13. In step S25, the control unit 9 controls the time measuring unit 15 to initialize the burning time to zero, and the process returns to step S21 in FIG. In response to this, the timer unit 15 initializes the burning time to zero.
  • step S14 of FIG. 8 the control unit 9 determines that the cooked food 14 has burned to the bottom of the pan 12.
  • step S15 the inverter circuit 8 is controlled so as to stop the heating operation or reduce the heating output, and the heating process is terminated.
  • step S23 even if the heating output set value WH is changed during cooking until the process of step S23 is performed, in step S23, the burning standby time is based on the changed heating output set value WH. It is determined. In general, the smaller the heating power is, the smaller the rate of temperature rise of the pan 12 is. Therefore, the pan 12 does not burn more rapidly than when the heating power is large. In the present embodiment, the control unit 9 sets the burning standby time so that the burning standby time becomes longer as the heating output setting value WH is smaller. Therefore, the heating power is relatively small (that is, the heating output setting value WH is small). ) Even in the case of boiled food that wants to burn the cooked food 14, for example, the cooked food 14 can be moderately burnt.
  • the scoring detection function can be used accurately without causing the scoring detection function to work during cooking and the heating operation to stop or the heating output to be reduced, thereby hindering cooking.
  • the burning standby time is set so that the burning standby time becomes longer as the heating output set value WH is smaller.
  • the present invention is not limited to this.
  • the heating output set value WH is set to a relatively large value. Therefore, the larger the heating output set value WH, the longer the charred standby time is set. May be.
  • the control unit 9 burns the burn-in time included in the burn-in time signal ST. Even if it is above, the inverter circuit 8 is not controlled to stop the heating operation or reduce the heating output. Therefore, when cooking a heavy fried food with a load requiring a high heating power, it is possible to prevent the scoring from being detected by mistake, stopping the heating operation, or reducing the heating output to affect the cooking. Furthermore, according to the heating process of FIG.7 and FIG.8, when the heating output setting value WH is changed from 2000W or more to less than 2000W, the process for burning detection after step S22 is performed.
  • the user can change the cooking mode and set the non-burning switch.
  • the burn-in detection function can be used without operation.
  • the process proceeds to step S26 when the heating output set value WH is 2000 W or more.
  • the present invention is not limited to this, and the process proceeds to step S26 when the heating output set value WH is outside the predetermined range. But you can.
  • the burn detection unit 13 outputs the burn information signal SB, the state where the output voltage VT is less than the output voltage V1 continues for a predetermined time (time period) or more before the burn waiting time elapses (YES in step S24).
  • the control unit 9 controls the time measuring unit 15 so as to initialize the burning time to zero. Therefore, in the case of cooking in which a liquid is added to the pan 12 after first cooking the cooked food 14 or after scorching the boiled food, scorching is not detected before cooking the cooked food.
  • the burning detection function can be used accurately without detecting burning during cooking and stopping heating.
  • step S24 in FIG. 8 it is determined whether or not the state where the output voltage VT is less than the output voltage V1 has continued for a predetermined time (time period) or more.
  • the present invention is not limited to this, and the output voltage VT It may be determined whether or not it has been determined whether or not a state where is less than a predetermined output voltage other than the output voltage V1 has continued for a predetermined time (time period).
  • the detection function is available.
  • the scorching detection function does not stop heating against the user's intention by the scoring detection function.
  • the detection function can be used.
  • FIG. 9 is a flowchart showing a burning detection process according to the third embodiment of the present invention.
  • the present embodiment is characterized in that the output voltage V1 is set such that the output voltage V1 increases as the heating output set value WH increases.
  • step S62 the burn detection unit 13 sets the output voltage V1 so that the output voltage V1 increases as the heating output set value WH increases.
  • step S60 the burn detection unit 13 determines whether or not the output voltage VT is equal to or higher than the predetermined output voltage V1. If YES, the process proceeds to step S61. If NO, the process returns to step S62.
  • step S61 the burn detection unit 13 outputs a burn information signal SB indicating that the pan 12 has burned to the control unit 9 and the time measuring unit 15, and ends the burn detection process.
  • the rate of temperature rise of the pan 12 when the food 14 burns on the pan 12 is smaller than when the heating output set value WH is high.
  • the output voltage V1 is set so that the output voltage V1 increases as the heating output set value WH increases. It is possible to determine the burning before the temperature becomes severe, to stop the heating operation or to reduce the heating output.
  • the degree of progress of scoring of the cooked product 14 varies depending on the heating output set value WH, according to the present embodiment, the cooked product 14 is appropriately scorched regardless of the heating output set value WH. Can do.
  • the output voltage V1 can be set to increase as the heating output set value WH increases. Furthermore, the scoring detection function does not interfere with cooking due to the user's intention during cooking, and the scoring detection function can be used accurately.
  • FIG. 10 is a block diagram showing a configuration of an induction heating unit 3A according to the fourth embodiment of the present invention.
  • the induction heating unit 3A according to the present embodiment has the pan 12 on the top plate 2 based on the input current and the resonance voltage detected by the measurement unit 16.
  • a panless detection unit 17 for determining whether or not there is a pan is further provided, and a control unit 9 ⁇ / b> A is provided instead of the control unit 9.
  • the control unit 9A controls the time counting unit 15 so that the burning time is initialized to zero when the panless detection unit 17 determines that there is no pan 12 on the top plate 2. .
  • the measurement part 16 detects the input current and resonance voltage to the inverter circuit 8 similarly to the measurement part 16 of the induction heating cooking appliance which concerns on 1st Embodiment, and shows the detected input current and resonance voltage.
  • the signal is output to the control unit 9 and the no pan detection unit 17.
  • the panless detection unit 17 generates a pan on the top plate 2 based on the difference between the detected input current and a preset current value, and the difference between the detected resonance voltage and a preset voltage value. 12 is detected and a panless detection signal SN indicating the detection result is generated and output to the control unit 9A.
  • the resonance voltage rises sharply with respect to the input current as compared with when the pan 12 is present.
  • the no pan detection unit 17 determines the presence or absence of the pan 12 using the difference in the characteristic of the resonance voltage when the pan 12 is present and when the pan 12 is absent (see, for example, Patent Document 2).
  • the control unit 9 when the control unit 9 inputs the no pan detection signal SN indicating that there is no pan 12 when performing the heating process of FIG. 4, the control unit 9 measures the time to initialize the burn time to zero.
  • the part 15 is controlled and it progresses to step S13. Therefore, after the user has finished cooking, when the pan 12 is replaced and the next cooking is performed without turning on and off the heating start switch 6s and the power switch of the induction heating cooker, the pan 12 is placed on the top plate 2.
  • a panless detection signal SN indicating that there is no pan is generated, and the burning detection time is initialized to zero. For this reason, even when cooking after the pan 12 has been replaced, it is possible to detect scorching as in the first embodiment, and the scoring detection function works against the user's intention during cooking, which hinders cooking. In addition, the burn detection function can be used accurately.
  • the infrared sensor 11 is an InGaAs pin photodiode.
  • the present invention is not limited to this, and a temperature range including a temperature at which scorching occurs, such as a silicon photodiode or a thermopile, uses infrared rays. Any element that can be detected may be used.
  • the product line sensor 11 was provided in the vicinity of the heating coil 7, this invention is not restricted to this, What is necessary is just to be provided in the position which can detect the temperature of the pan 12.
  • the input current detection circuit 16c is a current transformer.
  • the present invention is not limited to this, and any circuit that can detect the input current to the inverter circuit 8 may be used.
  • the resonance voltage detection circuit 16v is a measurement transformer, but the present invention is not limited to this, and any circuit that can detect a resonance voltage may be used.
  • the induction heating cooker of the present invention prohibits the inverter circuit from being controlled in response to the burn information signal when the burn time measured by the timer is less than the predetermined burn standby time. Therefore, even when cooking is performed in a normal heating mode in which the heating output set value can be changed without imposing a predetermined operation such as selection of a specific cooking mode or selection of a predetermined function for preventing burnt, etc. A scoring detection function is available.
  • heating is not stopped at an earlier timing than necessary against the user's intention during cooking.
  • it can detect burnt and automatically stop heating or reduce the heating output so that the burnt state does not deteriorate, making it easier to use than conventional techniques. Can be improved.
  • the induction heating cooker according to the present invention is a built-in type, a desktop type used on a table, a stationary type used on a table, etc., and a heating output set value for home use or business use is set. Applicable to induction heating cookers that can be set.

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  • Induction Heating Cooking Devices (AREA)

Abstract

L'invention porte sur un dispositif de cuisson par induction, qui comprend : une unité de commande (9) qui commande un courant haute fréquence qui est délivré en sortie par un circuit d'onduleur (8); une unité de détection de carbonisation (13) qui délivre en sortie à l'unité de commande (9) un signal d'information de carbonisation (SB) qui indique qu'un aliment (14) a commencé à se carboniser au fond d'un récipient (12), lorsqu'une tension de sortie (VT) d'un capteur d'infrarouge (11) atteint une tension de sortie (V1); et une unité de temporisateur (15) qui temporise le temps de carbonisation à partir du moment où le signal d'information de carbonisation (SB) a été délivré en sortie. L'unité de commande (9) interdit la commande du circuit d'onduleur (8) en réponse au signal d'information de carbonisation (SB) si le temps de carbonisation est inférieur à un temps d'attente de carbonisation prédéterminé, même si le signal d'information de carbonisation (SB) a été délivré en sortie.
PCT/JP2011/003244 2010-06-10 2011-06-08 Dispositif de cuisson par induction WO2011155200A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022173146A1 (fr) * 2021-02-10 2022-08-18 엘지전자 주식회사 Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction

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JP2003004237A (ja) * 2001-06-20 2003-01-08 Rinnai Corp 加熱調理器
JP2004178969A (ja) * 2002-11-27 2004-06-24 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006260942A (ja) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2008041471A (ja) * 2006-08-08 2008-02-21 Matsushita Electric Ind Co Ltd 誘導加熱装置
JP2010092679A (ja) * 2008-10-07 2010-04-22 Panasonic Corp 誘導加熱調理器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003004237A (ja) * 2001-06-20 2003-01-08 Rinnai Corp 加熱調理器
JP2004178969A (ja) * 2002-11-27 2004-06-24 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2006260942A (ja) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2008041471A (ja) * 2006-08-08 2008-02-21 Matsushita Electric Ind Co Ltd 誘導加熱装置
JP2010092679A (ja) * 2008-10-07 2010-04-22 Panasonic Corp 誘導加熱調理器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022173146A1 (fr) * 2021-02-10 2022-08-18 엘지전자 주식회사 Dispositif de chauffage par induction et procédé de commande de dispositif de chauffage par induction

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