WO2011096215A1 - Cuisinière à induction et procédé de commande associé - Google Patents

Cuisinière à induction et procédé de commande associé Download PDF

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Publication number
WO2011096215A1
WO2011096215A1 PCT/JP2011/000600 JP2011000600W WO2011096215A1 WO 2011096215 A1 WO2011096215 A1 WO 2011096215A1 JP 2011000600 W JP2011000600 W JP 2011000600W WO 2011096215 A1 WO2011096215 A1 WO 2011096215A1
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WIPO (PCT)
Prior art keywords
output
heating
output voltage
value
voltage value
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PCT/JP2011/000600
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English (en)
Japanese (ja)
Inventor
さつき 青山
新太郎 野口
弘志 中澤
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パナソニック株式会社
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Priority to JP2011552698A priority Critical patent/JP5675657B2/ja
Publication of WO2011096215A1 publication Critical patent/WO2011096215A1/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 scorch detection function and a control method thereof.
  • a cooking device having a burn-in detection function performs a boiling detection operation after the start of heating, and the temperature and input power when the boiling is detected and the temperature change pattern until the boiling is detected.
  • the state quantity such as the viscosity and capacity of the existing food is judged, and the cooking power required for heating after boiling is determined.
  • it is judged that stock broth has run out and the temperature at the bottom of the pan has risen to a predetermined value or higher, it is judged that the broth has run out and the cooked food has burned to the pan, and automatic boiling is performed. It has the structure which has a cooking mode (for example, refer patent document 1).
  • FIG. 6 is a block diagram of an induction heating cooker according to the prior art
  • FIG. 7 is a flowchart showing its operation.
  • the top plate 2 is a crystallized ceramic plate provided on the upper surface of the induction heating cooker, and the induction heating coil 3 is provided below the top plate 2.
  • the inverter circuit 108 a includes a switching element and a resonance capacitor, constitutes an inverter together with the induction heating coil 3, and supplies a high frequency current to the induction heating coil 3.
  • the controller 107 controls on / off of the switching element of the inverter circuit 108a to control the heating output.
  • a thermistor 104 for measuring the back surface temperature of the top plate 2 is provided.
  • the thermistor 104 outputs the detection result to the control unit 107.
  • the operation unit 110 operated by the user of the induction heating cooker is provided with an output setting unit 110a, a heating start key 110b for starting a heating operation, and a control mode selection key 110c for selecting an operation mode. Yes.
  • the output setting unit 110a is provided with a down key 110aa for decreasing the output set value by one step each time the button is pressed during operation in the heating mode, and an up key 110ab for increasing the output set value by one step each time the button is pressed. ing.
  • the control unit 107 enters a standby mode.
  • the control unit 107 stops the heating operation when in the standby mode, and selects one operation mode from a plurality of operation modes including the stew mode by operating the control mode selection key 110c of the operation unit 110. Is possible.
  • the operation mode is selected in the standby mode (S302) and the heating start key 110b is pressed (S303)
  • the heating operation is started in the selected operation mode.
  • the control unit 107 prohibits the user from changing the output setting value by the output setting unit 110a, as described in Patent Document 1.
  • the heating output is automatically controlled, and when it is detected that the temperature of the pan 1 has risen abnormally, the burning detection function for detecting burning is activated (S306).
  • the control unit 107 does not operate the burn detection function (S305), and the user sets the output setting unit 110a. It is possible to change the output set value by using.
  • the cooking mode in which the burn-in detection function works is limited to the stew mode, and in the stew mode, changing the output set value by the output setting unit 110a is prohibited. That is, in the heating mode in which the user can change the output setting value with the output setting unit 110a, the burn-in detection function cannot be activated, and the heating output is automatically set in order to use the burn-in detection function. There was a problem that the stew function must be selected.
  • the object of the present invention is to solve the above-mentioned conventional problems and provide a scoring detection function when it is assumed that a scoring detection function is necessary even when cooking is performed in a heating mode in which a heating output can be freely selected by a user's operation.
  • the burn-in detection function is activated unnecessarily and may adversely affect the cooking operation, the burn-in detection function is disabled so that the negative influence on the normal cooking operation in the heating mode is suppressed.
  • the induction heating cooker according to the present invention is provided with a top plate for placing a pan, an inverter including an induction heating coil provided under the top plate for heating the pan, and provided under the top plate, An infrared sensor that detects infrared rays emitted 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 the output voltage from a predetermined first output voltage value to the first output A scoring detection unit that outputs scoring information indicating that the food is scorched on the bottom of the pan when it is detected that it has increased to a predetermined second output voltage value greater than a voltage value, a first output setting value; An output setting unit for selecting one output set value from a plurality of different output set values including a second output set value higher than the first output set value; and the induction heating A heating mode for controlling the heating operation of the inverter so that the heating output is a heating output corresponding to the selected output setting value, and after inputting the burn information,
  • the output voltage is
  • a control unit that controls the heating operation based on the burnt information and stops the heating operation or suppresses the heating output when the voltage is equal to or higher than a predetermined third output voltage value.
  • the control unit performs control of the heating operation based on the burnt information,
  • the second output set value is selected, the control of the heating operation based on the burn information is prohibited and the heating operation is continued.
  • the output voltage is When the burn detection unit detects that the elapsed time from the first output voltage value to the predetermined fourth output voltage value set to be equal to or lower than the third output voltage value is less than a predetermined determination value, the burn Control of the heating operation based on information is prohibited, and the heating operation is continued.
  • the induction heating cooker and the control method thereof of the present invention even when the user performs the heating operation in the heating mode, which is the operation mode in which the user selects the heating output and performs the cooking, when cooking is cooked It is possible to stop heating automatically by detecting burnt or to weaken the heating output so that the burnt state does not worsen, and is unnecessary when cooking at high temperature such as fried cooking It is possible to improve usability by preventing the burn-in detection function from operating.
  • An induction heating cooker is provided under a top plate on which a pan is placed, an inverter including an induction heating coil provided under the top plate and heating the pan, and under the top plate. Detecting an infrared ray radiated from the bottom of the pan and passing through the top plate and outputting an output voltage corresponding to a bottom surface temperature of the pan; and the output voltage from a predetermined first output voltage value A burnout detection unit that outputs burnt information indicating that the food has burnt on the bottom of the pan when detecting an increase to a predetermined second output voltage value greater than one output voltage value, and a first output set value An output setting unit for selecting one output setting value from a plurality of different output setting values including a second output setting value higher than the first output setting value, and the guidance A heating mode for controlling the heating operation of the inverter so as to supply a high-frequency current to the heating coil and a heating output corresponding to the selected output setting value; The output voltage is set to be lower than a predetermined output voltage
  • a control unit that controls the heating operation based on the burned information and stops the heating operation or suppresses the heating output when the voltage is equal to or higher than a predetermined third output voltage value.
  • the control unit executes control of the heating operation based on the burnt information when the first output set value is selected during the operation in the heating mode. When the second output set value is selected, control of the heating operation based on the burnt information is prohibited and the heating operation is continued.
  • the output voltage is
  • the burn detection unit detects that an elapsed time from the first output voltage value to a predetermined fourth output voltage value set to be equal to or lower than the third output voltage value is less than a predetermined determination value, Control of the heating operation based on the burnt information is prohibited, and the heating operation is continued. Therefore, in the heating mode, which is an operation mode in which cooking is performed by selecting a heating output, it is possible to detect the burn and prevent the burned state from deteriorating, so that the usability can be improved.
  • the second output set value corresponding to high heating output is selected, control of the heating operation based on the burnt information is prohibited and the burnout detection function is disabled so that the heating output is stopped unnecessarily.
  • the output voltage is changed from the first output voltage value to the fourth output voltage. If the elapsed time to reach the value is less than the predetermined judgment value, it is judged that the fried food is being cooked and the control of the heating operation based on the burnt information is prohibited so that the burnout detection function does not work and is used Contrary to the user's intention, the heating output is not unnecessarily reduced, and the usability can be improved.
  • An induction heating cooker is particularly the induction heating cooker of the first aspect of the invention, in which the output set value is changed from the second output set value while the control unit is operating in the heating mode.
  • the heating operation is controlled based on the burnt information. Therefore, even when the second output set value is selected, when the first output set value is selected, the burn-out detection operation is performed by executing the control of the heating operation based on the burn-in information.
  • the burn-in detection function can be accurately performed with the changed output setting value including acceptance / rejection of the function.
  • An induction heating cooker is, in particular, the induction heating cooker according to the first or second invention, comprising a heating start key that is an operation switch, and the control unit selects a heating mode and performs the heating.
  • the output set value is set to a first output set value that is smaller than a predetermined maximum output set value and greater than a predetermined minimum output set value, and the heating operation is performed in the heating mode. And Therefore, when the heating start key is operated, it is automatically set to an intermediate predetermined output set value at which the burn-in detection operation works, so that the usability can be improved.
  • the control unit has the output voltage larger than the first output voltage value at the start of heating. And when it is more than the predetermined 5th output voltage value set below the 2nd output voltage value, control of the heating operation based on the burning information is prohibited, and the heating operation is performed in the heating operation mode. Therefore, the heating operation can be continued without unnecessarily stopping the heating operation or suppressing the heating output.
  • a method for controlling an induction heating cooker comprising: a top plate on which a pan is placed; an inverter including an induction heating coil provided under the top plate for heating the pan; An infrared sensor that detects infrared rays radiated from the bottom of the pan and transmitted through the top plate and outputs an output voltage corresponding to the bottom temperature of the pan; and the output voltage is a predetermined first output voltage.
  • a scoring detection unit that outputs scoring information indicating that the food is scorched on the bottom of the pan when it is detected that the value has increased from a value to a predetermined second output voltage value greater than the first output voltage value;
  • An output setting unit for selecting one output set value from a plurality of different output set values including one output set value and a second output set value higher than the first output set value;
  • a heating mode for controlling the heating operation of the inverter so as to supply a high frequency current to the induction heating coil and a heating output corresponding to the selected output setting value is input, and the burnt information is input.
  • the output voltage is lower than a predetermined output voltage value used for stopping the heating operation or suppressing the heating output.
  • a control unit that controls the heating operation based on the burnt information, which stops the heating operation or suppresses the heating output when the voltage is equal to or higher than a predetermined third output voltage value to be set.
  • a heating operation based on the burnt information when the first output set value is selected while the control unit is operating in the heating mode.
  • the control of the heating operation based on the burnt information is prohibited, the heating operation is continued, and the first output set value is selected
  • the burn detection that the elapsed time until the output voltage reaches a predetermined fourth output voltage value set to be equal to or less than the third output voltage value from the first output voltage value is less than a predetermined determination value.
  • the induction heating cooker control method is particularly the induction heating cooker control method according to the fifth aspect of the invention, wherein the output set value is set while the control unit is operating in the heating mode.
  • the method further includes a step of controlling the heating operation based on the burnt information.
  • the induction heating cooker control method is particularly the induction heating cooker control method according to the fifth or sixth aspect of the invention, wherein the induction heating cooker has a heating start key that is an operation switch. And when the heating mode is selected and the heating start key is operated, the controller sets the output set value to be smaller than a predetermined maximum output set value and greater than a predetermined minimum output set value. And a heating operation in the heating mode.
  • the method for controlling the induction heating cooker according to the eighth aspect of the invention is particularly the control method for the induction heating cooker according to the fifth to seventh aspects of the invention, wherein the control unit is configured to output the output voltage when starting heating. When it is greater than a first output voltage value and greater than or equal to a predetermined fifth output voltage value set to be less than or equal to the second output voltage value, control of the heating operation based on the burn information is prohibited and heating operation is performed in the heating operation mode.
  • the method further includes the step of:
  • FIG. 1 is an overall circuit block diagram of an induction heating cooker according to Embodiment 1 of the present invention
  • FIG. 2 is a block diagram of a burnt detection unit 5 in FIG. 1
  • FIG. 3 is this embodiment.
  • 4 is a flowchart showing a heating process in the heating mode of the induction heating cooker according to FIG. 4, and
  • FIG. 4 is a flowchart showing a temperature gradient determination process executed by the burnt detection unit 5 of FIG.
  • FIG. 5 is a diagram showing the time change of the output voltage V of the infrared sensor 4 after the start of heating.
  • the top plate 2 is a ceramic plate provided on the top surface of the induction heating cooker, and the induction heating coil 3 is provided below the top plate 2.
  • the pan 1 is placed on the top plate 2 at a position facing the induction heating coil 3.
  • a rectifier 9 c that rectifies AC power from an AC power source 9 a, a switching element, and a resonance capacitor are included, and an inverter 8 is configured together with the induction heating coil 3 to supply a high frequency current to the induction heating coil 3
  • An inverter circuit 8a, an input current detector 9b for measuring the input current of the inverter 8, and a controller 7 for controlling the heating output by controlling the switching elements of the inverter circuit 8a are provided.
  • the induction heating coil 3 generates a high frequency magnetic field when a high frequency current is supplied.
  • a high frequency current is supplied.
  • an eddy current is induced on the bottom surface of the pan 1, and the eddy current generates Joule heat and the bottom surface is inductively heated.
  • an operation unit 10 for a user to input a control command includes an output setting unit 10a, a heating start key 10b for starting a heating operation, and a control for selecting an operation mode.
  • a mode selection key 10c is provided.
  • the output setting unit 10a is provided with a down key 10aa for decreasing the output set value corresponding to the heating output of the induction heating coil 3 by one step and an up key 10ab for increasing the output set value by one step. ing.
  • the user can set the heating output of the induction heating coil 3 by operating the keys 10aa and 10ab to select one output setting value from among a plurality of stages of output setting values.
  • the heating output is set to 100 W
  • the heating output is set to 300 W
  • the output set value is 3
  • the heating output is set to 700 W.
  • the heating output is set to 1000 W.
  • the heating output is set to 1450 W.
  • the heating output is 2000 W. Is set.
  • the output setting values 1 to 6 the output setting values 1, 2, 3, and 4 corresponding to the “low output” heating output are referred to as the first output setting value W1 and correspond to the “high output” heating output.
  • the set output values 5 and 6 are referred to as a second set output value W2.
  • the control mode of the control unit 7 becomes a standby mode in which heating is stopped.
  • the user can select an operation mode that is a control mode for controlling the operation during the heating operation.
  • the user can select one operation mode from a plurality of operation modes by operating the control mode selection key 10c in the standby mode.
  • the plurality of operation modes include, for example, a heating mode and a fried food mode.
  • the heating mode is an operation mode in which a heating operation is performed with a heating output corresponding to the output set value selected by the user as described above, and the fried food mode is an operation mode for fried food.
  • the heating mode is an operation mode in which the heating operation is performed with the output set value selected by the user.
  • the output setting unit 10a includes an up key 10ab and a down key 10aa.
  • the control unit 7 monitors the input current of the inverter 8 with the input current detection unit 9b including the current transformer, and configures the inverter circuit 8a so that the heating output becomes a value corresponding to the changed output set value.
  • a switching element (not shown) is controlled to supply a required high-frequency current to the induction heating coil 3.
  • the infrared sensor 4 detects infrared rays emitted from the bottom surface of the pan 1 and transmitted through the top plate 2, and outputs an output voltage V corresponding to the bottom surface temperature of the pan 1 to the control unit 7.
  • the output voltage V is a predetermined output voltage value V0 (for example, the output voltage value V0 is the bottom temperature of the pan 1 is the ignition temperature of oil). This is the output voltage V when the temperature is about 300 ° C.)
  • the control unit 7 has a fried food mode that is an operation mode for fried food.
  • the output voltage V is a predetermined output voltage value (not shown) (for example, the output voltage value V when the bottom temperature of the pan 1 is about 180 ° C.). ) Control to stop heating or increase / decrease heating output so as to stabilize.
  • the output voltage values V0 to V6, times t0 to t5, the first elapsed time T0, the boiled food determination value T01, the second elapsed time T1 and the fried food determination value T11 of the infrared sensor 4 described below are shown in FIG. Are listed.
  • the output voltage values V0 to V6 are defined as follows with respect to the bottom surface temperature of the pan 1.
  • Output voltage value V0 During the operation in the heating mode, when the control of the heating operation based on the burn information described later from the burn detection unit 5 is prohibited and the heating operation is continued, the control unit 7 performs the heating operation. It is an output voltage value corresponding to a predetermined heating stop temperature to be stopped, and the heating stop temperature is, for example, an oil ignition temperature (300 ° C.).
  • First output voltage value V1 A predetermined output voltage value substantially corresponding to the lowest temperature (for example, 129 ° C.) that can be measured by the infrared sensor 4.
  • 2nd output voltage value V2 It is the temperature when the degree of burning of the pot bottom of the pot 1 is relatively small (when burning starts), and the temperature gradient of the heated object is “large”, Alternatively, a predetermined output voltage value corresponding to a predetermined temperature (for example, 159 ° C.) used to determine whether it is “medium”.
  • Third output voltage value V3 a predetermined burn determination temperature (for example, 230 ° C.) for determining the burn of a high-viscosity heated object such as curry whose temperature gradient is determined to be “medium”
  • Fifth output voltage value V5 Predetermined output voltage value (V1 ⁇ V5 ⁇ V2 when prohibiting the control of the heating operation based on the burnt information at the start of heating. As shown in FIG.
  • V5 V2 may also be used.
  • V6 Sixth output voltage value V6: a predetermined burn determination temperature (for example, 135 ° C.) for determining the burn of a low-viscosity heated object such as boiled food, for which the temperature gradient is determined to be “small” A predetermined output voltage value corresponding to.
  • the first elapsed time T0, the boiled food determination value T01, the second elapsed time T1 and the fried food determination value T11 are defined as follows.
  • First elapsed time T0 Elapsed time after starting the heating operation at time t0.
  • Boiled food determination value T01 A predetermined elapsed time after starting the heating operation at time t0 (for example, 2 minutes) for determining whether the object to be heated is a low-viscosity food such as boiled food.
  • Second elapsed time T1 Elapsed time from the time when the voltage value of the output voltage V of the infrared sensor 4 becomes the first output voltage value V1.
  • the heating process in the heating mode of the induction heating cooking appliance which concerns on this Embodiment is demonstrated.
  • the portion showing the burn-in detection operation is indicated by a broken line.
  • the control unit 7 determines whether the currently set output setting value is the second output setting value W2 corresponding to “high output” or the first output setting corresponding to “low output”. It is determined whether or not the value is W1 (S103).
  • the control unit 7 controls the inverter circuit 8a so as to stop heating, thereby preventing oil ignition.
  • the output set value is 4 or less, which is the first output set value W1, in S103, it is determined that the output is “low output” (NO in S103), and the scoring detection operation after S104 is executed. Continue heating.
  • the control unit 7 changes the output set value to the first output set value W1 by operating the output setting unit 10a.
  • the processing after S104 is executed, and the control of the heating operation based on the burning information from the comparison units 17 and 18 of the burning detection unit 5 is executed.
  • the output set value is 4 (the corresponding heating output is 1000 W) and is not changed.
  • the control unit 7 receives the output voltage V of the infrared sensor 4, measures its magnitude, and sends the information to the burn detection unit 5.
  • the burn-in detection unit 5 may input the output voltage V directly from the infrared sensor 4 without the control unit 7 interposed.
  • the burn-in detection unit 5 includes a first output voltage value V1, a second output voltage value V2 that is greater than the first output voltage value V1, a third output voltage value V3, and a fourth output voltage value V4. And a temperature storage unit 11 for storing the sixth output voltage value V6 in advance.
  • the first output voltage value V1 can be, for example, a voltage output from the infrared sensor 4 when the pan bottom of the pan 1 reaches about 129 ° C.
  • the second output voltage value V2 is a voltage output from the infrared sensor 4 when the pan bottom of the pan 1 reaches about 159 ° C. This is because the degree of scorching is relatively small when the pan bottom of the pan 1 is about 159 ° C.
  • the comparison unit 12 determines whether the output voltage V is equal to or higher than the second output voltage value V2, thereby turning on the heating start key 10b and starting heating. It is determined whether or not the bottom surface temperature of the pan 1 immediately after or the bottom surface temperature of the pan 1 immediately after the output set value is changed during heating is equal to or higher than the temperature corresponding to the second output voltage value V2 (S104). .
  • the control unit 7 determines that the output voltage V immediately after the heating start key 10b is turned on and heating is started, or the output voltage V immediately after the output set value is changed during heating is equal to or higher than the second output voltage value V2.
  • the temperature gradient determination process in FIG. 4 is executed by the scorch detection unit 5 in FIG. 2, and a first temperature gradient determination process (S201 to S206) for determining whether or not the temperature gradient of the object to be heated is “small”; And a second temperature gradient determination process (S208) for determining whether the temperature gradient is “medium” or “large”.
  • the controller 7 sends a counter reset signal and a count start signal to the second timer circuit 15 when the heating operation is started by the heating start key 10b (time t0).
  • the second timer circuit 15 resets the first elapsed time T0 in response to the reset signal, and starts counting the first elapsed time T0, which is the elapsed time after the start of heating, in response to the count start signal (S201). ).
  • the comparison unit 12 determines whether or not the output voltage V is equal to or higher than the first output voltage V1 (S202). When YES in S202, the comparison unit 12 transmits a counter reset signal and a count start signal to the first timer circuit 14, and in response thereto, the first timer circuit is reset and counts the second elapsed time T1. Start (S204).
  • step S202 the comparison unit 14 determines whether or not the first elapsed time T0 is equal to or greater than the boiled food determination value T01 (S203). If YES in step S203, the process proceeds to step S207. If NO, the process returns to step S202.
  • the bottom temperature of the pan 1 does not become the lowest temperature that can be measured by the infrared sensor 4 unless it is boiled.
  • the output voltage V does not reach the first output voltage value V1. Therefore, before the output voltage V reaches the first output voltage value V1, the first elapsed time T0 becomes the boiled food determination value T01 stored in the time storage unit 16 (time t5).
  • the boiled food determination value T01 can be, for example, about 2 minutes, but is not limited to this value.
  • the comparison unit 14 increases the bottom temperature of the pan 1 over time. Is “small” and a signal indicating the determination result is sent to the temperature storage unit 11 (S207).
  • a second temperature gradient determination process is performed (S208).
  • the time when the output voltage V of the infrared sensor 4 becomes the first output voltage value V1 by the first timer circuit 13 in S204 (for example, at time t1 in the case of the curve B in FIG. 5). Yes, in the case of curve C, it is time t2.)
  • the counting of the second elapsed time T1 from the beginning is started.
  • the comparison unit 12 determines whether or not the output voltage V is equal to or higher than the second output voltage value V2 that is larger than the first output voltage value V1. If NO in S205, the process of S205 is repeated.
  • the comparison unit 12 determines whether or not the first elapsed time T0 is equal to or greater than the boiled food determination value T01.
  • the comparison unit 14 determines in S207 that the rising gradient of the bottom surface temperature of the pan 1 over time is “small”, and sends a signal indicating the determination result to the temperature storage unit 11. send.
  • the process proceeds to S208.
  • the first timer circuit 13 has elapsed time from when the output voltage V reaches the first output voltage value V1 until it reaches the second output voltage value V2 (for example, from time t1 to time t4 in the curve B in FIG. 5). Or the time from time t2 to time t4 on curve C) is measured (S204, S205). In S206, it is determined whether or not the temperature gradient is “small”. When it is not determined that the temperature gradient is “small” (NO in S206), the process proceeds to S208.
  • the comparison unit 18 determines the fried food in which the second elapsed time T ⁇ b> 1 until the output voltage V becomes the second output voltage value V ⁇ b> 2 after the output voltage V becomes the first output voltage value V ⁇ b> 1 is stored in the time storage unit 16. It is determined whether or not the value is equal to or greater than T11.
  • the fried food determination in which the second elapsed time T1 until the output voltage V becomes the second output voltage value V2 after the output voltage V becomes the first output voltage value V1 is stored in the time storage unit 16
  • the comparison unit 18 determines that the rising gradient of the bottom temperature of the pan 1 is “medium”, and outputs the determination result to the comparison unit 17 (S209).
  • the comparison unit 17 determines whether or not the output voltage V is greater than or equal to the third output voltage value V3 (S211), and if the output voltage V is greater than or equal to the third output voltage value V3 (YES in S211).
  • the burn information indicating that the cooked food has burned on the bottom of the pot 1 is output to the control unit 7 (S212). Moreover, if the output voltage V is less than the 3rd output voltage value V3, the comparison part 17 will continue heating, without outputting burning information to the control part 7 (it is NO at S211). On the other hand, when the second elapsed time T1 from when the output voltage V reaches the first output voltage value V1 until the second output voltage value V2 is less than the fried food determination value T11 (NO at S208), the comparison unit 18 determines that the rising gradient of the bottom surface temperature of the pan 1 is “large”, and the comparison unit 17 that has input the determination result displays burnt information even if the output voltage V is equal to or higher than the third output voltage value V3. Heating is continued without outputting to the control unit 7 (S210).
  • the fried food determination value T11 can be set, for example, between 20 seconds and 200 seconds, and can be set to, for example, about 100 seconds. Moreover, it is preferable that the fried food determination value T11 varies according to the plate thickness of the pan. That is, as the plate thickness becomes smaller (thinner), the rate at which the pan temperature rises increases, so it is preferable to set the fried food determination value T11 to be smaller.
  • the thickness of the plate can be judged by the size of the rising speed of the pan temperature during heating. It can be estimated that the plate thickness is smaller (thin) as the rate of increase in the temperature measured by the infrared sensor 4 increases.
  • the temperature storage unit 11 stores a sixth output voltage value V6 that is smaller than the second output voltage value V2.
  • the sixth output voltage value V6 can be set to about 135 ° C., for example.
  • the sixth output voltage value V6 may be set so that the degree of burning of the object to be heated in the cooking is as low as possible.
  • the comparison unit 17 compares the output voltage V with the sixth output voltage value V6, and when the output voltage V becomes equal to or higher than the sixth output voltage value V6 (YES in S106), the cooked food is placed on the bottom of the pot 1.
  • Burn information indicating that the burn has occurred is output to the control unit 7.
  • the control unit 7 stops the heating operation or suppresses the heating output based on the burn-in information, notifies the burn-in (S111), and returns to S101.
  • the burning of the object to be heated in stew cooking is higher than the burning determination temperature (a temperature corresponding to the third output voltage V3) when it is determined that the object to be heated has a relatively high viscosity such as curry.
  • Detection can be performed earlier with a low burn determination temperature (a temperature corresponding to the sixth output voltage value V6), and heating can be stopped, heating output can be suppressed, or burn can be notified.
  • the comparison unit 17 determines the determination result. Is output.
  • the comparison unit 17 determines that the object to be heated has a relatively high viscosity such as curry (S209). In this case, it is determined as NO in S107, and the comparison unit 17 responds to the determination result output from the comparison unit 18 so that the output voltage V is smaller than the predetermined heating stop output voltage value V0 and is the sixth output voltage value.
  • the process returns to S101.
  • the third output voltage value V3 can be set to about 230 ° C., for example.
  • the comparison unit 18 determines that the rising temperature of the bottom surface temperature of the pan 1 is “large” as a result of the second temperature gradient determination (NO in S208), the comparison unit 17 is fried food cooking. And the burned information is not output to the control unit 7 (S210). As a result, it is determined as NO in S107, the control of the heating operation based on the burnt information of the control unit 7 is prohibited, and the heating operation is continued (S109).
  • the measurement end time of the second elapsed time T1 used in the second temperature gradient determination process is the time when the second output voltage value V2 is reached, but is set to be equal to or lower than the third output voltage value V3. It may be the time when the fourth output voltage value V4 is reached, and the fourth output voltage value V4 and the second output voltage value V2 may be the same or different.
  • the induction heating cooker includes an inverter 8 including a top plate 2 on which the pan 1 is placed and an induction heating coil 3 that is provided below the top plate 2 and heats the pan 1.
  • An infrared sensor 4 that is provided under the top plate 2, detects infrared rays that are emitted from the bottom of the pan 1 and passes through the top plate 2, and outputs an output voltage V corresponding to the bottom temperature of the pan 1;
  • V has increased from a predetermined first output voltage value V1 to a predetermined second output voltage value V2 that is greater than the first output voltage value V1
  • V1 When it is detected that V has increased from a predetermined first output voltage value V1 to a predetermined second output voltage value V2 that is greater than the first output voltage value V1, it indicates that the food has been burned on the bottom of the pan 1
  • One output setting value from among a plurality of different output setting values including a burnout detection unit 5 that outputs information, a first output setting value W1, and a second output setting value W2 that
  • the predetermined output used for stopping the heating operation or suppressing the heating output when the output voltage V is equal to or higher than the second output voltage value V2 and the burn-in information is not input.
  • a control unit 7 for controlling the heating operation based on the burned information which stops the heating operation or suppresses the heating output when the voltage value is equal to or higher than a predetermined third output voltage value V3 set lower than the voltage value V0;
  • the control unit 7 controls the heating operation based on the burnt information.
  • the second output set value W2 is selected, the control of the heating operation based on the burnt information is prohibited and the heating operation is continued.
  • the output voltage The second elapsed time T1 until V reaches a predetermined fourth output voltage value V4 set to be equal to or less than the third output voltage value V3 from the first output voltage value V1 is less than the predetermined fried food determination value T11.
  • the burn-in detection unit 5 detects, control of the heating operation based on the burn-in information is prohibited and the heating operation is continued.
  • the heating mode which is an operation mode in which cooking is performed by selecting a heating output
  • a relatively large heating output is set (when the second output set value W2 is selected), such as when cooking a stir-fried dish
  • the burning is not a problem, in FIG. 3, from the process of S103 to S109. Therefore, it is possible to prevent the heating output from decreasing by detecting that it has been burned unnecessarily.
  • the control unit 7 when the second output set value W2 is selected and the heating operation is controlled in the heating mode, the control unit 7 is changed to the first output set value W1 and in the heating mode.
  • the control of the heating operation based on the burn-in information from the burn-in detection unit 5 (the processing of S103 to S111 in FIG. 3) is performed.
  • the heating start key 10b which is an operation switch is provided. Further, when the heating mode is selected and the heating start key 10b is operated, the control unit 7 sets the output set value to a first output set value W1 that is 4 smaller than the maximum output set value 6 and larger than the minimum output set value 1. The heating operation is performed in the heating mode. With this configuration, the heating output that automatically controls the heating operation based on the burn-in information is set at the start of heating, so that the burn-in function does not work and the chance of the burn-out state getting worse can be reduced.
  • the control part 7 is the predetermined 5th output voltage value by which the output voltage V was set to the 2nd output voltage value V2 or the 2nd output voltage value V2 or less at the time of a heating start.
  • V5 or higher YES in S104
  • control of the heating operation based on the burnt information is prohibited, and the heating operation is performed in the heating operation mode without executing the control of the heating operation based on the burnt information.
  • the heating operation can be continued without unnecessarily stopping the heating operation or suppressing the heating output by the burn-in detection operation.
  • the scoring detection unit 5 starts heating that the output voltage V has increased from the first output voltage value V1 to a second output voltage value V2 that is greater than the first output voltage value V1.
  • a second elapsed time T1 from the first output voltage value V1 to the second output voltage value V2 is detected until the time has elapsed by the post-boiled food determination value T01 (NO in S206).
  • the fried food determination value is equal to or greater than T11 (YES in S208), that is, when it is detected that the rising gradient of the temperature corresponding to the output voltage V with respect to the time passage is below a predetermined value, it is detected that the cooked food has burned to the bottom of the pan.
  • the heating stop temperature used for the fried food (the temperature corresponding to the output voltage value V0) is lower than the temperature (the temperature corresponding to the third output voltage value V3). Yes.) Stop heat or inhibit heating output. With this configuration, it is possible to alleviate the burnt state of a highly viscous liquid such as curry.
  • the bottom surface temperature of the pan 1 is detected by the infrared sensor 4, the bottom surface temperature of the pan 1 can be detected with good responsiveness when using a temperature sensitive element such as a thermistor. Can be detected with high accuracy.
  • the induction heating cooker and the control method thereof according to the present invention can detect scorching in an operation mode in which heating is performed with an output setting value selected by the user, and can output as high as fried food cooking.
  • the burn-in detection function will not operate unnecessarily, and cooking can be continued, so it is built-in, tabletop type used on the table, or stationary type used on the table
  • the present invention can be applied to an induction heating cooker for which output can be set for home use or business use.

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

Abstract

Lorsqu'elle est en mode de chauffage avec une sortie configurable, une unité de détection de brûlure (5) fournit en sortie des informations de brûlure si la tension de sortie (V) d'un capteur infrarouge (4), qui détecte les rayons infrarouges provenant d'une casserole (1), augmente pour passer d'une première valeur de tension de sortie (V1) à une deuxième valeur de tension de sortie (V2) ou à une valeur supérieure à cette dernière. Après réception des informations de brûlure par une unité de commande (7), ladite unité de commande (7) arrête le chauffage si la tension de sortie (V) atteint une troisième valeur de tension de sortie (V3) qui est définie de manière à être inférieure à une tension de sortie (V0) à laquelle le chauffage est suspendu lorsque des informations de brûlure ne sont pas fournies en entrée. L'unité de commande (7) ne met pas en œuvre la commande de chauffage en fonction des informations de brûlure lorsque le chauffage à une valeur d'ajustement de sortie d'au moins une valeur prédéterminée, ou lorsque la vitesse d'augmentation de température de la casserole (1) est au moins égale à une valeur prédéterminée. En cas de cuisson à température élevée telle que la friture en mode de chauffage, le roussissement peut être détecté sans la suspension inutile du chauffage.
PCT/JP2011/000600 2010-02-03 2011-02-03 Cuisinière à induction et procédé de commande associé WO2011096215A1 (fr)

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PCT/JP2011/000600 WO2011096215A1 (fr) 2010-02-03 2011-02-03 Cuisinière à induction et procédé de commande associé
PCT/JP2011/000602 WO2011096217A1 (fr) 2010-02-03 2011-02-03 Cuisinière à induction et procédé de commande associé
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JP4972905B2 (ja) * 2005-10-07 2012-07-11 パナソニック株式会社 誘導加熱調理器
JP4875939B2 (ja) * 2006-07-19 2012-02-15 日立アプライアンス株式会社 誘導加熱調理器
JP4933989B2 (ja) * 2006-09-01 2012-05-16 パナソニック株式会社 誘導加熱調理器
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JP5125244B2 (ja) * 2006-11-08 2013-01-23 パナソニック株式会社 加熱調理器およびそのプログラム
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JPH0715329B2 (ja) * 1991-08-02 1995-02-22 リンナイ株式会社 こんろの制御装置
JP2003004237A (ja) * 2001-06-20 2003-01-08 Rinnai Corp 加熱調理器
JP2005011670A (ja) * 2003-06-19 2005-01-13 Rinnai Corp 誘導加熱調理器
JP2007018787A (ja) * 2005-07-06 2007-01-25 Matsushita Electric Ind Co Ltd 調理器

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JP5675657B2 (ja) 2015-02-25
WO2011096213A1 (fr) 2011-08-11
JPWO2011096214A1 (ja) 2013-06-10
JP5684153B2 (ja) 2015-03-11
JPWO2011096216A1 (ja) 2013-06-10
JPWO2011096217A1 (ja) 2013-06-10
JPWO2011096215A1 (ja) 2013-06-10
JPWO2011096213A1 (ja) 2013-06-10
WO2011096216A1 (fr) 2011-08-11
JP5681119B2 (ja) 2015-03-04
WO2011096214A1 (fr) 2011-08-11
JP5592410B2 (ja) 2014-09-17
JP5684152B2 (ja) 2015-03-11
WO2011096217A1 (fr) 2011-08-11

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