JP2014192083A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker which can easily set a timer time such that a residual heating time is zero before heating is disabled due to a decrease in remaining energy amount of a storage battery in the case where the storage battery is used as a power source and a set output value is changed.SOLUTION: An induction heating cooker comprises a timer time setting part 9 which determines a longest timer time depending on an energy amount remaining in a storage battery 6 and an output set value set by an operation part 11, and displays a timer time not greater than the longest timer time on a timer display part 10, and changes the longest timer time to be shorter when the output set value is significantly changed thereby to easily select the timer time capable of continuing heating by power supplied from the storage battery 6.

Description

  The present invention relates to an induction heating cooker using a storage battery as a power source for induction heating.

  Conventionally, as this type of induction heating cooker, a storage battery is used as an inverter power supply, the amount of charging energy stored in the storage battery is displayed, and the remaining usable time is calculated from the remaining amount of charging energy. Thus, the remaining usage time is displayed (for example, see Patent Document 1).

  FIG. 2 shows a circuit configuration of a conventional induction heating cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 2, the conventional induction heating cooker includes a power storage unit 106 that stores charging energy, a charging circuit 131 that rectifies the commercial power source 120 and charges the power storage unit 106, a heating coil 103, and a heating coil 103. Inverter circuit 105 that supplies high-frequency current, power supply unit 124 that supplies power to power storage unit 106 to inverter circuit 105, and power supply unit 124 are controlled so that the power supplied to the load becomes a predetermined value. The control unit 108 for controlling the inverter circuit 105 and the charge state display unit 109 for displaying the charge state are provided.

  The charging state display unit 109 is configured to display the amount of charging energy stored in the storage unit 106 and calculate and display the remaining usable time from the remaining amount of charging energy.

JP-A-11-111442

  However, in the conventional configuration, although the amount of remaining charging energy of the storage battery is displayed or the remaining usable time is displayed, the usable time varies depending on the use condition, that is, the thermal power. It is difficult to understand how long it can be used with the thermal power, and in some cases, there is a problem that the cooking device cannot be used during cooking.

  The present invention solves the above-mentioned conventional problems, and in timer cooking, the user can set an appropriate timer time according to the heating output, and the cooking energy can be used because the charging energy is lost during cooking. The purpose is to provide a user-friendly induction heating cooker that reduces the chance of disappearing.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a heating coil that induction-heats a cooking container, a storage battery, and a heating coil that converts the output of the storage battery into a high-frequency current and supplies the heating coil to the heating coil. Inverter circuit, an operation unit for setting the output set value, an output display unit for displaying the output set value, a timer for counting the time during the heating operation, and the timer counting operation is started and the timer counts. A timer setting unit that sets the timer time, which is the remaining time from the start until the count value of the timer reaches the set value, and the operation of the inverter circuit so that the heating output of the heating coil becomes the output set value A control unit that stops the heating operation when the timer time reaches zero, a remaining amount calculation unit that calculates the amount of energy remaining in the storage battery, and a timer A timer display unit that displays the maximum timer time that is the longest timer time that can be set based on the calculation result of the remaining amount calculation unit, and the output setting value is increased. When the output setting value is changed, the maximum timer time is changed to be shorter than before the output setting value is changed, and the output setting value is set until the timer time set after the output setting value is changed to zero. In this configuration, the heating operation can be continued.

  Thereby, the user can know the timer time according to the heating output, and the chance that the charging energy is lost during cooking and the heating cooker cannot be used is reduced, and the induction cooking device becomes easy to use for the user.

  The induction heating cooker of the present invention can display the maximum timer time that can be set according to the energy remaining in the storage battery and the heating output, and can improve the convenience of using the power supply from the storage battery effectively in timer cooking. it can.

The circuit diagram which shows the circuit structure of the induction heating cooking appliance in Embodiment 1 of this invention. The circuit diagram which shows the circuit structure of the conventional induction heating cooking appliance

  The first invention includes a heating coil that induction-heats a cooking vessel, a storage battery, an inverter circuit that includes the heating coil, converts the output of the storage battery into a high-frequency current, and supplies the heating coil, and an operation unit that sets an output set value And an output display unit that displays the output set value, a timer that counts the time during the heating operation, and the timer count operation starts, and the timer count value reaches the set value after the timer starts counting The timer setting unit that sets the timer time that is the remaining time until and the operation of the inverter circuit so that the heating output of the heating coil becomes the output set value, and the control that stops the heating operation when the timer time becomes zero A timer, a remaining amount calculating unit that calculates an amount of energy remaining in the storage battery, and a timer display unit that displays a timer time. The setting unit calculates the longest timer time that is the longest settable timer time based on the calculation result of the remaining amount calculation unit, and outputs the longest timer time when the output setting value is changed to be larger Induction heating cooking that has been changed so that it is shorter than before the set value is changed, and heating operation can be continued with the output set value until the timer time set after the output set value is changed to zero It is a container.

  Thereby, in timer cooking, even if an output set value is changed, a user can easily select a remaining heating time (hereinafter also referred to as a timer time) in which heating can be continued with power supplied from the storage battery. In addition, since the power supply from the storage battery can be used effectively, an induction heating cooker that is convenient for the user can be realized with a simple configuration.

  In particular, according to a second aspect of the present invention, in the first aspect of the invention, a notification unit that notifies the user by voice or a buzzer is provided. The notification is made when the timer time is changed to be shorter than the set value. Thereby, after the timer time is once set, the user can grasp that the timer has been changed, and the induction heating cooker can be made more convenient.

In the third invention, in particular, the operation unit of the first or second invention accepts the operation for changing the output setting value when the operation for changing the output setting value is performed and the longest timer time is not more than a predetermined value. There is no configuration. Thereby, the chance that the remaining amount of charging energy is lost during cooking after changing the set thermal power and the heating cooker cannot be used can be reduced, and an easy-to-use induction heating cooker can be provided.

  In the fourth aspect of the invention, in particular, the notification unit of the third aspect of the invention is configured to notify when the operation unit does not accept an operation for changing the output set value. As a result, the user can be informed that the remaining energy of the storage battery has dropped to such a state that cooking may fail without obtaining power supply from the storage battery until cooking is completed. A good induction cooker can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a circuit diagram showing a circuit configuration of an induction heating cooker according to Embodiment 1 of the present invention.

  In FIG. 1, a cooking container 1 is placed on a top plate 2, and the cooking container 1 is induction heated by a high frequency magnetic field from a heating coil 3. The temperature sensor 4 is installed below the heating coil 3. Thermal infrared rays from the cooking container 1 enter the temperature sensor 4 through a visible portion (not shown) of the top plate 2, and the temperature sensor 4 detects thermal infrared rays from the cooking container 1. The control unit 8 includes a microcomputer, and controls the inverter circuit 5 that includes the heating coil 3 and supplies a high-frequency current to the heating coil 3. The control unit 8 controls the operation of the inverter circuit 5 so that the heating output of the heating coil 3 becomes an output set value set by the operation unit 11. Moreover, the control part 8 controls the heating output of the inverter circuit 5 based on the temperature information by the temperature sensor 4 so that the temperature of the cooking vessel 1 becomes a predetermined temperature.

  The user can start or stop heating to switch the power ON / OFF of the cooking device or to heat the cooking container 1 placed on the top plate 2 via the operation unit 11. Further, by operating the operation unit 11, the output set value can be changed so as to increase or decrease the heating power (heating output) when heating, and the temperature control of the fried food is performed by selecting a menu. be able to.

  Further, when the power is turned on according to the operation of the operation unit 11, the power LED is turned on, and the output setting value that is changed and set by the operation of the operation unit 11 is displayed on the output display unit 12. . For example, it displays by the number of lighting of LED of the output display part 12. FIG.

  The output of the inverter circuit 5 storage battery 6 is converted into a high-frequency current and supplied to the heating coil 3. The storage battery 6 uses a lithium ion battery as a battery cell, and the specification of the lithium ion battery is, for example, a rated voltage of 200 V and 1000 Wh. In this embodiment, a lithium ion battery is used, but other storage batteries such as a nickel-cadmium storage battery, a nickel-metal hydride storage battery, and a lead storage battery may be used. It does not need to be limited to these.

  The remaining amount calculation unit 7 detects a supply current from the storage battery 6 to the inverter circuit 5 with a current sensor (not shown) or the like, and uses the integrated value of the detected supply current as an energy amount obtained from the storage battery 6. 6 is subtracted from the rated capacity value (rated energy) of 6 to calculate the amount of energy remaining in the storage battery 6.

Next, operations of the control unit 8, the timer time setting unit 9, and its peripheral circuits will be described. The timer 13 counts time during the heating operation. The timer time setting unit 9 starts a count operation of the timer 13 and sets a timer time that is a remaining time from when the timer 13 starts counting until the count value of the timer 13 reaches a set value. The timer display unit 10 displays this timer time. The control unit 8 stops the heating operation when the timer time becomes zero.

  First, when the user operates the operation unit 11 and performs a heating start operation of the induction heating cooker, the control unit 8 determines that heating is being performed. When the control unit 8 determines that heating is in progress, power is supplied from the storage battery 6. First, the control unit 8 confirms the state of charge of the storage battery 6. If the storage battery 6 can be supplied, the control unit 8 drives the inverter circuit 5, and for example, the output setting set by the operation unit 11 as shown in (Table 1). The operation of the inverter circuit 5 is controlled so that the heating output of the heating coil 3 becomes a value.

  The timer time setting unit 9 sets the time calculated by dividing the amount of energy remaining in the storage battery 6 calculated by the remaining amount calculation unit 7 by the output set value set by the operation unit 11 as the longest timer time. The timer time setting unit 9 can set the timer time from zero to the longest timer time, and displays the set timer time on the timer display unit 10.

  Further, the timer time setting unit 9 changes the longest timer time to be shorter than before the output set value is changed when the operation set 11 is changed so that the output set value is increased, and the output setting value is set. The heating operation can be continued at the output set value until the timer time set after the value is changed to zero.

  For this reason, when performing timer cooking, even if the output value output set value is changed, the user can easily select a timer time that allows heating to be continued with the power supplied from the storage battery. Therefore, a user-friendly cooking device can be realized with a simple configuration.

  When the timer time setting unit 9 determines that energy cannot be supplied due to a small amount of energy remaining in the storage battery 6, the timer display unit 10, the output display unit 12, or another display unit (see FIG. (Not shown) A message prompting you to charge (for example, “No battery. Please charge”) is displayed, and heating is not performed. In this case, it can be used again by removing the storage battery 6 and charging it. Moreover, it is also possible to prepare a spare storage battery 6 as an option and use it by exchanging it.

  In addition, since it can be seen as a real feeling that the remaining heating time (timer time) displayed on the timer display unit 10 varies depending on the output set value, the intention of the user to cook efficiently with the minimum necessary heating power works. It becomes easy. For this reason, the effect that the user is practicing energy saving without knowing as a result is also acquired.

  As described above, in the present embodiment, the user can grasp and set the remaining heating time according to the output set value that can be used with the power supplied from the storage battery in the current state of charge as needed. In addition, by making it easy to effectively utilize the power supply from the storage battery, it becomes easy to reduce the energy consumption with consideration of the user, and an easy-to-use induction heating cooker can be realized.

  Moreover, you may provide the alerting | reporting part 20 for alerting | reporting to a user. The notification unit 20 can be notified by voice, buzzer, etc. according to the operation by the user, and cooks when performing automatic cooking such as rice cooking or kettle, or when heating is stopped after a set time by timer cooking, etc. The end can also be notified.

  The alerting | reporting part 20 can alert | report when the timer time is changed shorter than the value currently set because the output set value was changed more largely than the value being set.

  With this configuration, the output setting value is changed after setting the timer time, and when the timer time is shorter than the currently set timer time, notification is made so that the user can grasp the remaining heating time, and the power supply from the storage battery Can be effectively utilized, and an easy-to-use induction heating cooker can be realized with a simple configuration.

  In addition, when the operation for changing the output set value is performed, if the longest timer time is equal to or shorter than a predetermined value (for example, 3 minutes before the remaining time), the operation unit 11 may not accept the heating start operation.

  With this configuration, it is possible to provide an easy-to-use induction heating cooker by reducing the chance that the remaining amount of charging energy disappears during cooking after changing the output set value and the heating cooker cannot be used.

  Moreover, the alerting | reporting part 20 may alert | report when the longest timer time is below a predetermined value (for example, 3 minutes before remaining time).

  With this configuration, it is possible to inform the user in advance that the power supply from the storage battery may not be obtained until cooking is complete, and cooking may fail, giving the user the opportunity to reconsider the output setting and ease of use A good cooking device can be realized.

  As described above, the cooking device according to the present invention uses a storage battery as a heating energy source and can optimally display the timer time according to the set output value and the remaining energy amount of the storage battery. The present invention can be similarly applied to other induction heating cookers used in kitchens and commercial kitchens.

1 Cooking container 2 Top plate 3 Heating coil (heating means)
6 Storage battery 7 Remaining amount calculation unit 8 Control unit 9 Timer time setting unit 10 Timer display unit 11 Operation unit 12 Output display unit 13 Timer 20 Notification unit

Claims (4)

A heating coil that induction-heats the cooking vessel; a storage battery; an inverter circuit that includes the heating coil and converts the output of the storage battery to a high-frequency current and supplies the same to the heating coil; and an operation unit that sets an output setting value; An output display unit that displays an output set value, a timer that counts time during a heating operation, and starts the count operation of the timer, and the timer count value is set to the set value after the timer starts counting A timer setting unit for setting a timer time which is a remaining time until reaching, and controlling the operation of the inverter circuit so that the heating output of the heating coil becomes the output set value, and heating when the timer time becomes zero A control unit for stopping the operation, a remaining amount calculating unit for calculating the amount of energy remaining in the storage battery, and the timer time. A timer display unit that calculates a longest timer time that is the longest settable timer time based on a calculation result of the remaining amount calculation unit, and the output set value is large. When the output setting value is changed, the longest timer time is changed to be shorter than before the output setting value is changed, and the timer time set after the output setting value is changed becomes zero. The induction heating cooker that allows the heating operation to be continued at the output set value. An informing unit for informing a user by voice or buzzer is provided, and the informing unit has been changed to be shorter than the current timer time because the output set value has been changed to be larger than the currently set value. The induction heating cooker of Claim 1 which alert | reports when. The induction heating cooking according to claim 1 or 2, wherein, when the operation for changing the output set value is performed, the operation unit does not accept the operation for changing the output set value when the longest timer time is equal to or less than a predetermined value. vessel. The induction heating cooker according to claim 3, wherein the notification unit notifies when the operation unit does not accept an operation of changing an output set value.