WO2011155193A1 - Cuisinière à induction - Google Patents

Cuisinière à induction Download PDF

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Publication number
WO2011155193A1
WO2011155193A1 PCT/JP2011/003232 JP2011003232W WO2011155193A1 WO 2011155193 A1 WO2011155193 A1 WO 2011155193A1 JP 2011003232 W JP2011003232 W JP 2011003232W WO 2011155193 A1 WO2011155193 A1 WO 2011155193A1
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WIPO (PCT)
Prior art keywords
integrated power
pan
heating
inverter circuit
output voltage
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PCT/JP2011/003232
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English (en)
Japanese (ja)
Inventor
輝雄 林中
新太郎 野口
史太佳 小笠原
Original Assignee
パナソニック株式会社
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Priority to JP2012519252A priority Critical patent/JPWO2011155193A1/ja
Publication of WO2011155193A1 publication Critical patent/WO2011155193A1/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.
  • the induction heating cooker described in Patent Document 2 determines whether the cooked product has burned into the cooking container based on the temperature gradient of the temperature of the cooking container.
  • Japanese Patent Laid-Open No. 10-149875 Japanese Patent Laid-Open No. 2007-115515. JP 2001-357968 A. International Publication No. 2007/088931 Pamphlet.
  • the burn-in detection unit is provided for detecting burn-in during stew cooking, so that when the user uses the burn-in detection function, the user can use it for stew cooking. It has been necessary to perform a predetermined operation for operating the burnt detection unit, such as selecting a corresponding specific cooking mode (for example, a stew mode).
  • a predetermined operation for operating the burnt detection unit such as selecting a corresponding specific cooking mode (for example, a stew mode).
  • a corresponding specific cooking mode for example, a stew mode.
  • the induction heating cooker of Patent Document 2 performs scoring detection regardless of cooking contents, scoring may be erroneously detected and the heating output may be reduced when it is not necessary to detect scoring.
  • An object of the present invention is to solve the above-mentioned problems and to provide an induction heating cooker capable of operating or stopping a burn detection function without imposing a predetermined operation for detecting burn on, such as selection of a cooking mode. 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 an operation of the inverter circuit so as to supply a high frequency current to the induction heating coil and the heating output becomes a heating output corresponding to the selected heating output set value.
  • burn information indicating that the cooked food has burned to the bottom of the pan A burn-out detection unit that generates a signal and outputs it to the control unit, and an integrated power measurement unit that measures an integrated power of the power input to the inverter circuit, and the control unit starts the operation so as to start the operation
  • the integrated power measuring unit is controlled to start measuring the integrated power, and when the integrated power measured by the integrated power measuring unit reaches a predetermined threshold integrated power,
  • the inverter circuit is controlled to stop the heating operation or reduce the heating output in response to the burned information signal.
  • the output voltage is equal to or higher than the second output voltage, it is prohibited to control the inverter circuit in response to the burn information signal.
  • 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 heating output set value is changed during cooking, for example, when the cooking content is fried food, the cooking content is mistakenly determined to be boiled food, and the scorching detection function is not necessary in the scene where the scoring detection function is unnecessary. I don't work.
  • the burning detection function does not work when the burning detection function is necessary, and the burning detection function can be used. I can do it.
  • the burn-in detection function is operated or stopped without imposing a predetermined operation on the user such as selection of a specific cooking mode or selection of a predetermined function for preventing burn-in. It is possible and does not detect scoring accidentally during cooking.
  • FIG. 3 is a circuit diagram showing configurations of a rectifying / smoothing circuit 93 and an inverter circuit 8 in FIG. 2.
  • A) is a graph showing the relationship between the elapsed time from the start of heating and the output voltage VT from the infrared sensor 11 in FIG. 2, and (b) shows the relationship between the elapsed time from the start of heating and the integrated power P.
  • the first invention includes a top plate for placing a pan, an induction heating coil provided under the top plate and for induction heating the pan, an inverter circuit for supplying a high frequency current to the induction heating coil, An infrared sensor that detects infrared rays radiated from the bottom of the pan and passes through the top plate and outputs an output voltage corresponding to the bottom temperature of the pan, and one heating output setting value from a plurality of heating output setting values An output setting unit for selecting, and a control unit for supplying a high-frequency current to the induction heating coil and controlling the operation of the inverter circuit so that the heating output becomes a heating output corresponding to the selected heating output setting value And when the output voltage of the infrared sensor is equal to or higher than a predetermined first output voltage, a burned information signal is generated to indicate that the cooked food has burned to the bottom of the pan.
  • a burn-out detection unit that outputs to the control unit, and an integrated power measurement unit that measures the integrated power of the power input to the inverter circuit, and the control unit controls the inverter circuit to start operation
  • the integrated power measuring unit is controlled to start measuring the integrated power, and when the integrated power measured by the integrated power measuring unit reaches a predetermined threshold integrated power, the output voltage is When the output voltage is less than a predetermined second output voltage lower than the output voltage, the inverter circuit is controlled to stop the heating operation or reduce the heating output in response to the burned information signal, while the output voltage is When the voltage is equal to or higher than the second output voltage, it is prohibited to control the inverter circuit in response to the burned information signal.
  • 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.
  • cooking contents that do not require a burn-in detection function for example, fried food
  • cooking that requires a burn-in detection function are more accurate than conventional techniques. Since the contents (for example, boiled food) can be discriminated, even if the heating output set value is changed during cooking, for example, when the cooking contents are fried food, the cooking contents are mistakenly determined to be boiled food.
  • the scoring detection function works in situations where the scoring detection function is unnecessary, and does not hinder cooking. Also, when the cooking content is boiled food, it is mistakenly determined that the cooking content is fried food, and there is no case that the burning detection function does not work when the burning detection function is necessary, and the burning detection function can be used. I can do it.
  • control unit sets the threshold integrated power so that the threshold integrated power decreases as the selected heating output set value increases. It is characterized by doing.
  • the heating output set value is changed during cooking, for example, it is possible to distinguish between fried food and boiled food.
  • the cooking content is fried food
  • the cooking content is boiled food.
  • the scoring detection function works in situations where the scoring detection function is unnecessary and the scoring detection function is unnecessary, so that cooking is not hindered.
  • the burning detection function does not work when the burning detection function is necessary, and the burning detection function can be used. I can do it.
  • a measurement unit that measures the input current input to the inverter circuit and the resonance voltage of the inverter circuit, and the measured input current and resonance voltage
  • a pan type discriminating unit for discriminating the material of the pan and the control unit increases the threshold value as the thermal conductivity of the material of the pan discriminated by the pan type discriminating unit increases.
  • the threshold integrated power is set so as to increase the power.
  • the integrated power threshold according to the characteristics of the pan, it is possible to distinguish, for example, fried food and boiled food with high accuracy regardless of the material of the pot.
  • the cooking content is fried food
  • the cooking content is mistakenly determined to be boiled food, and the burning detection function works in situations where the burning detection function is unnecessary, so that cooking is not hindered.
  • the burning detection function does not work when the burning detection function is necessary, and the burning detection function can be used. I can do it.
  • the pan type discriminating unit is configured so that the difference between the measured input current and a preset first current value, and the measured resonance voltage The material of the pan is determined based on the difference from the set first voltage value.
  • the present invention has the same effects as the third invention.
  • control unit when the selected heating output set value is higher than a predetermined heating output set value, the control unit is configured to provide the burned information. Controlling the inverter circuit in response to a signal is prohibited, and the integrated power measuring unit is controlled to continue the measurement of the integrated power.
  • the measurement unit that measures the input current input to the inverter circuit and the resonance voltage of the inverter circuit, and the measurement A panless detector that determines whether or not the pan is on the top plate based on an input current and a resonance voltage, and the control unit is placed on the top plate by the panless detector.
  • the integrated power measuring unit is controlled to initialize the integrated power.
  • the burn detection function can be used accurately. it can.
  • the no-pan detector detects the difference between the measured input current and a preset second current value, and the measured resonance voltage in advance. Based on a difference from the set second voltage value, it is determined whether or not the pan is on the top plate.
  • the present invention has the same effects as the sixth invention.
  • the threshold integrated power is obtained when the cooking content of the induction heating cooker is fried food.
  • the second output voltage is the output voltage when the accumulated power becomes the threshold integrated power when the cooking content is boiled food.
  • the output power is set to an output voltage lower than the output voltage when the integrated power reaches the threshold integrated power.
  • 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) a 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 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 for selecting 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 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, the burned information signal SB
  • control unit 9 controls the integrated power measuring unit 15 so as to start measuring the integrated power P when the inverter circuit 8 is controlled so as to start the operation, and the integrated power measured by the integrated power measuring unit 15 is controlled.
  • the power P reaches the predetermined threshold integrated power PT
  • the output voltage VT is less than the predetermined output voltage V2 lower than the output voltage V1
  • the heating operation is stopped in response to the burned information signal SB or
  • the inverter circuit 8 is controlled so as to reduce the heating output.
  • the output voltage VT is equal to or higher than the output voltage and V2 or higher, it is prohibited to control the inverter circuit 8 in response to the burned information signal SB. It is said.
  • 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, an input current detection circuit 92, an integrated power measurement unit 15, a scoring detection unit 13, and a control unit 9 are configured.
  • 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 ends the burn detection process.
  • the output voltage V1 corresponds to the temperature at which the cooked product 14 burns into the pan 12 when the cooked product 14 having a relatively high viscosity such as curry is boiled (that is, when the cooking content is cooked).
  • Output voltage VT to be set.
  • 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.
  • a current detection circuit 92 is provided.
  • the input current detection circuit 92 is, for example, a current transformer (CT (Current Transformer)).
  • CT Current Transformer
  • the switching element 83 is on / off controlled by the control unit 9, whereby a high frequency current flows through the heating coil 7. And a high frequency magnetic field generate
  • the integrated power measurement unit 15 measures the integrated power P input to the inverter circuit 8 by integrating the input current detected by the input current detection circuit 92, and the measured integrated power P Is output to the control unit 9.
  • the integrated power measuring unit 15 initializes the integrated power P to zero based on the control from the control unit 9 and starts measurement.
  • the control unit 9 allows the user to change the heating output set value WH so that the heating output becomes a heating output corresponding to the heating output set value WH selected by the output setting unit 10. It has a heating mode in which the switching element 83 is on / off controlled. Further, the control unit 9 performs the heating process of FIG. 4 using the burnt information signal SB from the burnt detection unit 13, the output voltage VT from the infrared sensor 11, and the accumulated power P from the accumulated power measuring unit 15. To do.
  • 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. The control unit 9 stops the heating operation in the standby mode, and the user can operate the heating start switch 6s 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 S ⁇ b> 12 the control unit 9 starts the heating operation in the heating mode, and controls the integrated power measuring unit 15 so as to start measuring the integrated power P to the inverter circuit 8.
  • the integrated power measurement unit 15 starts integrating the integrated power P after initializing the integrated power P to zero.
  • the integrated power measurement unit 15 always measures the integrated power P and outputs it to the control unit 9 at least during the heating operation.
  • step S ⁇ b> 13 the control unit 9 controls the infrared sensor 11 to start outputting the output voltage VT corresponding to the temperature of the pan 12.
  • 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.
  • step S14 the control unit 9 sets the threshold integrated power PT to a predetermined integrated power P1.
  • step S15 it is determined whether or not the integrated power P is greater than or equal to the threshold integrated power PT. If YES, the process proceeds to step S16. If NO, the process of step S15 is repeated.
  • step S16 the control unit 9 determines whether or not the output voltage VT is equal to or higher than the predetermined output voltage V2, and if YES, the cooking content is determined to be a fried food and the process proceeds to step S19. If NO, the cooking content is determined to be boiled and the process proceeds to step S17.
  • the processing in steps S14 to S16 is cooking content determination processing for determining whether the cooking content is a fried food or a boiled food based on the integrated power P and the output voltage VT.
  • step S19 the control unit 9 prohibits the control of the inverter circuit 8 in response to the burned information signal SB (that is, without executing the process of step S18), continues the heating operation, and performs the heating process.
  • step S17 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 S18 if YES, and repeats the process of step S17 if NO. And execute.
  • step S18 the control part 9 controls the inverter circuit 8 so that a heating operation may be stopped or a heating output may be reduced, and a heating process is complete
  • the content of the process in step S18 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 (a) is a graph showing the relationship between the elapsed time from the start of heating and the output voltage VT from the infrared sensor 11 in FIG. 2, and (b) is the elapsed time from the start of heating and the integrated power P. It is a graph which shows the relationship.
  • the output voltage VT at the timing T1 at which the integrated power P becomes the integrated power P1 in the output voltage curve C1 when the cooking content is the fried food and the burn is generated is the output voltage VT.
  • V4 (V4 ⁇ V1).
  • the output voltage VT at the timing T1 is the output voltage V3 (V3 ⁇ V4).
  • the integrated power P1 is set so that the time from the start of measurement of the integrated power P until it is determined as YES in the determination process in step S15 is, for example, a time from 100 seconds to 200 seconds. That is, the integrated power P1 is set to the integrated power P before the food 14 is burnt on the bottom of the pan 12 when the cooking content by the induction heating cooker is fried, and the output voltage V2 is the cooking content.
  • a low output voltage VT is set.
  • the cooking content is fried food
  • the cooking content is a fried food
  • the heating operation is stopped or the heating output is reduced based on the burnt information signal S13. Therefore, the inverter based on the burned information signal SB according to the cooking content (boiled or fried) without imposing a predetermined operation on the user to automatically detect burnt such as selection of the cooking mode.
  • the control of the circuit 8 (the process of step S18) can be executed or prohibited. For this reason, heating is not stopped unnecessarily or the heating output is not weakened at the time of cooking the stir-fried food, so that the usability can be improved as compared with the prior art. Moreover, since the cooking content is determined using the integrated power P, the cooking content can be determined regardless of the heating output set value WH.
  • the cooking content is a fried food or a boiled food based on the output voltage VT of the infrared sensor 11 when the integrated power P reaches a predetermined integrated power P1.
  • the invention is not limited to this.
  • it may be determined whether the cooking content is a fried food or a boiled food based on the integrated power P when the output voltage VT reaches a predetermined output voltage.
  • FIG. 7 is a flowchart showing the heat treatment according to the second embodiment of the present invention.
  • the processes in steps S10 to S13 are the same as the processes in steps S10 to S13 of the heating process (see FIG. 4) according to the first embodiment, and thus the description thereof is omitted.
  • the heat treatment according to the present embodiment is characterized in that the threshold integrated power PT is set such that the threshold integrated power PT decreases as the selected heating output set value WH increases. Further, when the selected heating output setting value WH is higher than a predetermined heating output setting value (2000 W in this embodiment), it is prohibited to control the inverter circuit 8 in response to the burned information signal SB.
  • the integrated power measuring unit 15 is controlled so as to continue the measurement of the integrated power P.
  • step S14 the control unit 9 determines whether or not the heating output set value WH is higher than 2000 W. If YES, the process proceeds to step S19, and if NO, step S30. Proceed to In step S19, the control unit 9 prohibits the control of the inverter circuit 8 in response to the burned information signal SB (that is, without executing the process of step S18), and continues the heating operation. Proceed to S41. At this time, the control unit 9 does not stop the operation of the integrated power measurement unit 15 (that is, controls the integrated power measurement unit 15 so as to continue the measurement of the integrated power P). It is determined whether or not the output set value WH has been changed. If YES, the process returns to step S40. If NO, the process of step S41 is repeated.
  • FIG. 8 is a flowchart showing the cooking content determination process in step S30 of FIG.
  • the controller 9 determines whether or not the heating output set value WH is higher than 1500 W. If YES, the process proceeds to step S35, and if NO, the process proceeds to step S32.
  • step S32 the controller 9 determines whether or not the heating output set value WH is lower than 1500 W. If YES, the process proceeds to step S34, and if NO, the process proceeds to step S33.
  • the threshold integrated power PT is set to a predetermined integrated power P1 in step S33, and when the heating output set value WH is equal to 1500 W, the threshold integrated power is set in step S34.
  • the power PT is set to a predetermined integrated power P3, and when the heating output set value WH is higher than 1500 W, the threshold integrated power PT is set to the predetermined integrated power P2 in step S35.
  • step S36 the control unit 9 determines whether or not the integrated power P is greater than or equal to the threshold integrated power PT. If YES, the process proceeds to step S39. If NO, the process proceeds to step S38. In step S38, the control unit 9 determines that the cooking content is boiled food and returns to step S21 in FIG. In step S39, the control unit 9 determines that the cooking content is fried food and returns to step S21 in FIG.
  • the integrated powers P1, P2, and P3 are set so that P2 ⁇ P1 ⁇ P3.
  • step S17 the control unit 9 determines whether or not the burn information signal SB is input from the burn detection unit 13.
  • step S18 the control unit 9 controls the inverter circuit 8 so that a heating operation may be stopped or a heating output may be reduced, and a heating process is complete
  • FIG. 9 is a graph showing an example of the relationship between the elapsed time from the start of heating and the heating output set value WH when the heating process of FIG. 7 is executed, and (b) is the heating process of FIG. 5 is a graph showing an example of the relationship between the elapsed time from the start of heating and the threshold integrated power PT when the is executed, and a graph showing an example of the relationship between the elapsed time and the integrated power P.
  • FIG. 9A when the heating output set value WH is changed from 1500 W to 2000 W, and further changed to 1000 W, the threshold integrated power PT is integrated power as shown in FIG. 9B. It is changed from P1 to integrated power P2, and further to integrated power P3.
  • the smaller the heating output set value WH the greater the heat loss due to the relationship with the heat dissipation rate. Therefore, as compared with the case where the heating output set value WH is large, the temperature increase width is small even with the same integrated power. That is, as the heating output set value WH is smaller, the integrated power PT that is input until the pan 12 is burnt becomes larger.
  • the threshold integrated power PT is set to the integrated power P3
  • the heating output set value WH is 1500 W.
  • the threshold integrated power PT is set to the integrated power P1
  • the threshold integrated power PT is set to the integrated power P2.
  • the cooking content can be judged with high accuracy.
  • the cooking content determination process of FIG. 8 even if the heating output set value WH is changed during the heating process, the threshold integrated power PT is based on the changed heating output set value WH. Set again. For this reason, even when the rate of temperature increase at the bottom of the pan 12 greatly changes with the change of the heating output set value WH during cooking, the cooking content can be determined with high accuracy compared to the first embodiment, It is possible to execute the control based on the burnt information signal SB only during the cooking of the simmered food, without causing the burning in the fried food to be erroneously detected and causing the processing of step S18 to be hindered.
  • the control of the inverter circuit 8 is prohibited in response to the burned information signal SB (that is, without performing the process of step S18), and the heating operation is continued. Therefore, when a heavy fried food with a high heating power is required, it is possible to prevent scorching from being accidentally detected and affect cooking. Then, when the heating output set value WH is changed to 2000 W or less, the cooking content determination process is executed.
  • the cooking is performed by firstly frying with high heating power and then changing to low heating power (for example, meat potato)
  • the burn-in detection function (the function of controlling the inverter circuit 8 in response to the burn-in information signal SB) such as changing the cooking mode or operating the burn-in prevention switch is operated. Control of the inverter circuit 8 based on the burned information signal SB can be performed without imposing an operation for switching whether or not the user is on.
  • control of the inverter circuit 8 based on the burnt detection information signal SB can be executed when the cooking content is boiled food. Furthermore, irrespective of the heating output set value WH, it can be determined with high accuracy whether the cooking content is a fried food or a boiled food compared to the first embodiment. Further, even if the heating output set value WH is changed during cooking, it can be determined with high accuracy whether the cooking content is a fried food or a boiled food compared to the first embodiment. Further, the control of the inverter circuit 8 based on the burnt information signal SB is not performed during the cooking of the fried food, and the control based on the burnt information signal SB can be executed during the cooking of the boiled food.
  • the threshold integrated power PT when the heating output set value WH is 1000 W, the threshold integrated power PT is set to the integrated power P3, and when the heating output set value WH is 1500 W, the threshold integrated power PT is set.
  • the threshold integrated power PT is set to the integrated power P2.
  • the present invention is not limited to this, and the heating output set value WH is increased.
  • the threshold integrated power PT may be set small so that the threshold integrated power PT becomes small.
  • FIG. 10 is a block diagram showing a configuration of an induction heating unit 3A according to the third embodiment of the present invention.
  • the induction heating unit 3A according to the present embodiment includes an input current input to the inverter circuit 8 and a resonance voltage measurement unit 16 of the inverter circuit 8 resonance voltage, A pan type discriminating unit 17 for discriminating the material of the pan 12 based on the measured input current and resonance voltage is further provided, and a control unit 9A is provided instead of the control unit 9.
  • the control unit 9A sets the threshold integrated power PT so that the threshold integrated power PT increases as the thermal conductivity of the material of the pan 12 determined by the pot type determining unit 17 increases. It is a feature.
  • the measurement unit 16 detects an input current from the commercial AC power supply 91 to the rectifying / smoothing circuit 93 using an input current detection circuit 92 that is, for example, a current transformer, and, for example, a measurement transformer (VT ( Voltage Transformer)) is used to detect the resonance voltage of the resonance capacitor 81 (see FIG. 3) of the inverter circuit 8, and a signal indicating the detected input current and resonance voltage is output to the pot type discrimination unit 17. Further, the pot type discriminating unit 17 determines the difference between the detected input current and the preset first current value, and the difference between the detected resonance voltage and the preset second voltage value.
  • VT Voltage Transformer
  • the material of the pan 12 is discriminated, and a pan type discrimination signal SB indicating the discrimination result is generated and output to the control unit 9A.
  • the pan type discriminating unit 17 discriminates the material of the pan 12 based on the characteristic of the resonance voltage with respect to the input current, similarly to the induction heating cooker described in Patent Document 3 or 4.
  • FIG. 11 is a flowchart showing the heating process executed by the control unit 9A of FIG.
  • the heat treatment of FIG. 10 is characterized by including the processes of steps S20 and S14A instead of the process of step S14, as compared with the heat treatment of FIG.
  • the control unit 9A determines a correction value ⁇ P for the threshold integrated power PT based on the pan type determination signal SP. Specifically, the correction value ⁇ P is determined so that the correction value ⁇ P increases as the thermal conductivity of the material of the pot 12 increases, and the correction value ⁇ P decreases as the thermal conductivity of the material of the pot 12 decreases.
  • step S14A the control unit 9A adds the correction value ⁇ P1 to the integrated power P1, sets the integrated power after the addition to the threshold integrated power PT, and proceeds to step S15.
  • the amount of heat generated in the pan 12 is relatively large and the gradient of the output voltage VT tends to be small. is there.
  • the material of the pan 12 has a relatively low thermal conductivity such as non-magnetic stainless steel, the amount of heat generated in the pan 12 to the surroundings is relatively small, and the gradient of the output voltage VT becomes large. Tend. For this reason, compared with the case where the material of the pan 12 is aluminum, it is difficult to discriminate cooking contents. According to this embodiment, since the threshold integrated power PT is set according to the thermal conductivity of the material of the pan 12, cooking is performed with higher accuracy than the first embodiment regardless of the material of the pan 12.
  • the burn information is not detected during the cooking of the stir-fry, and the processing of step S18 is not performed and the cooking is not hindered.
  • the burn information signal SB only during the cooking of the boiled food. Control based on can be executed.
  • the measurement unit 16 detects the resonance voltage of the resonance capacitor 81, but the present invention is not limited to this, and the resonance voltage may be detected by detecting the resonance current of the resonance capacitor 81. Moreover, the measurement part 16 should just be able to detect the electric current input into the inverter circuit 8, and the resonant voltage of the inverter circuit 8. FIG.
  • FIG. 12 is a graph showing the configuration of the configuration of the induction heating unit 3B according to the fourth embodiment of the present invention.
  • the induction heating unit 3B according to the present embodiment has a measurement unit 16 similar to the measurement unit 16 of the induction heating cooker according to the third embodiment, as compared to the induction heating unit 3 according to the first embodiment.
  • the control unit 9B controls the integrated power measuring unit 15 to initialize the integrated power P when the panless detecting unit 18 determines that there is no pan 12 on the top plate 2. It is said.
  • the measurement part 16 is comprised similarly to the measurement part 16 of the induction heating cooking appliance which concerns on 2nd Embodiment, for example, from the commercial alternating current power supply 91 using the input current detection circuit 92 which is a current transformer.
  • the input current input to the rectifying and smoothing circuit 93 is detected, and the resonance voltage of the resonance capacitor 81 (see FIG. 3) of the inverter circuit 8 is detected using, for example, a measurement transformer, and the detected input current and A signal indicating the resonance voltage is output to the panless detector 18.
  • the no pan detection unit 18 determines the difference between the detected input current and the preset second current value, and the difference between the detected resonance voltage and the preset second voltage value.
  • panless detection signal SN indicating the detection result is generated and output to the control unit 9B.
  • the resonance voltage rises sharply with respect to the input current as compared with when the pan 12 is present.
  • the panless detector 18 determines the presence or absence of the pan 12 using the difference in the resonance voltage characteristics between when the pan 12 is present and when it is absent (see, for example, Patent Document 3).
  • the control unit 9 When the control unit 9 inputs the no pan detection signal SN indicating that there is no pan 12 when the heating process of FIG. 4 is being performed, the control unit 9 initializes the integrated power P to zero and restarts the measurement of the integrated power P. Thus, the integrated power measuring unit 15 is controlled, and the process proceeds to step S14. Therefore, the induction heating cooker according to the present embodiment operates as follows, for example.
  • step S16 of FIG. 4 When it is determined in step S16 of FIG. 4 that the cooking content is fried food, the user moves the pan 12 away from the top plate 2 and places the same pan 12 on the top plate 2 again. In this case, when the pan 12 is separated from the top plate 2, a panless detection signal SN indicating that there is no pan 12 is generated. In response to this, the integrated power P is initialized to zero, and the process returns to step S14. Then, it is determined in step S15 that the integrated power P does not reach the threshold integrated power PT and cooking is completed, or in step S16, the cooking content is a fried food. For this reason, since the control of the inverter circuit 8 based on the burned information signal SB (the process of step S18) is not executed, the user can continue cooking the fried food with the selected heating output set value WH.
  • step S16 of FIG. 4 When it is determined in step S16 of FIG. 4 that the cooking content is boiled food, the user moves the pan 12 away from the top plate 2 and places the same pan 12 on the top plate 2 again. In this case, when the pan 12 is separated from the top plate 2, a panless detection signal SN indicating that there is no pan 12 is generated. In response to this, the integrated power P is initialized to zero, and the process returns to step S14. Then, the determination process of step S15 is repeatedly executed.
  • the integrated power P1 in step S14 is set so that the time from the start of measurement of integrated power P to YES in the determination process in step S15 is, for example, 100 seconds to 200 seconds.
  • step S16 of FIG. 4 After it is determined in step S16 of FIG. 4 that the cooking content is fried food, the user moves the pan 12 away from the top plate 2 and places another pan 12 for cooking the stew on the top plate 2.
  • the no pan detection signal SN indicating that there is no pan 12 is generated.
  • the integrated power P is initialized to zero, and the process returns to step S14.
  • the burnt information signal SB is generated, control of the inverter circuit 8 based on the burnt information signal SB (processing in step S18) is executed.
  • step S16 of FIG. 4 After it is determined in step S16 of FIG. 4 that the cooking content is boiled food, the user separates the pan 12 from the top plate 2 and puts another pan 12 for cooking the fried food on the top plate 2.
  • the no pan detection signal SN indicating that there is no pan 12 is generated.
  • the integrated power P is initialized to zero, and the process returns to step S14.
  • the control of the inverter circuit 8 based on the burned information signal SB step S18
  • the user can cook the fried food with the selected heating output set value WH.
  • the panless detection signal SN indicating that there is no pan 12 is generated and the integrated power P is initialized.
  • the integrated power measurement unit 15 may be controlled so that the integrated power P is initialized to zero and the measurement of the integrated power P is restarted.
  • the integrated power measuring unit 15 starts measuring the integrated power P based on the control from the control unit 9, 9A or 9B, but the present invention is not limited to this.
  • the integrated power measuring unit 15 is configured to start measuring the integrated power P in response to the no pan detection signal SN indicating that there is the pan 12. Also good.
  • 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 infrared 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 integrated power measuring unit 15 measures the integrated power P by integrating the current input to the rectifying and smoothing circuit 93.
  • the present invention is not limited to this, and the input current to the inverter circuit 8 and the heating coil 7 are measured.
  • the integrated power P of the power input to the inverter circuit 8 may be measured by detecting every unit time and integrating the detected current and / or voltage per unit time.
  • the threshold integrated power PT may be corrected so that the threshold integrated power PT decreases as the output voltage VT of the pan 12 at the start of heating increases.
  • the induction heating cooker it is possible to detect scoring without imposing a predetermined operation on the user such as selection of a specific cooking mode or selection of a predetermined function for preventing scorching.
  • the function can be activated or deactivated and does not falsely detect scorching during cooking. For this reason, by determining the cooking scene (cooking content) desired by the user based on the heating output setting value selected by the user, for example, in the cooking of boiled food, the scoring detection function operates properly and cooking such as fried food is performed. Then, it is possible to eliminate false detection of the burn-in detection function, and it can also be applied to a determination method for preventing overheating during heating.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

La présente invention a trait à une cuisinière à induction qui est équipée d'une unité de commande (9) permettant de restreindre le courant à haute fréquence fourni par un circuit d'onduleur (8), d'une unité de détection de brûlure (13) permettant de fournir, à l'unité de commande (9), un signal d'information de brûlure (SB) indiquant que les aliments (14) ont brûlé et collent au fond d'une casserole (12) lorsque la tension de sortie (VT) d'un capteur infrarouge (11) atteint la tension de sortie (V1), et d'une unité de mesure de puissance cumulée (15) permettant de mesurer la puissance cumulée (P) fournie en entrée au circuit d'onduleur (8), laquelle unité de commande (9) empêche que le circuit d'onduleur (8) ne soit contrôlé en réponse au signal d'information de brûlure (SB) lorsque la puissance cumulée (P) atteint une puissance cumulée seuil (PT) et lorsque la tension de sortie (VT) est supérieure ou égale à la tension de sortie (V2).
PCT/JP2011/003232 2010-06-10 2011-06-08 Cuisinière à induction WO2011155193A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107860038A (zh) * 2017-10-11 2018-03-30 江西摩力斯厨房设备工程有限公司 一种高效节能电磁炉

Citations (6)

* 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
JP2004063199A (ja) * 2002-07-26 2004-02-26 Tiger Vacuum Bottle Co Ltd 電磁誘導加熱調理方法とこれに用いる誘導加熱調理器
JP2007115515A (ja) * 2005-10-20 2007-05-10 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
JP2009218140A (ja) * 2008-03-12 2009-09-24 Panasonic Corp 誘導加熱調理器
JP2009295456A (ja) * 2008-06-06 2009-12-17 Hitachi Appliances Inc 誘導加熱調理器

Patent Citations (6)

* 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
JP2004063199A (ja) * 2002-07-26 2004-02-26 Tiger Vacuum Bottle Co Ltd 電磁誘導加熱調理方法とこれに用いる誘導加熱調理器
JP2007115515A (ja) * 2005-10-20 2007-05-10 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
JP2009218140A (ja) * 2008-03-12 2009-09-24 Panasonic Corp 誘導加熱調理器
JP2009295456A (ja) * 2008-06-06 2009-12-17 Hitachi Appliances Inc 誘導加熱調理器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107860038A (zh) * 2017-10-11 2018-03-30 江西摩力斯厨房设备工程有限公司 一种高效节能电磁炉
CN107860038B (zh) * 2017-10-11 2024-04-19 江西省大庾烘焙设备有限公司 一种高效节能电磁炉

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