JP6229913B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker having a function of displaying power consumption or an electricity bill.

  In recent years, electrical appliances having a function of displaying power consumption or electricity charges have been proposed (see, for example, Patent Documents 1 and 2). In this type of electrical appliance, the current value input to the load is detected by the current detection device, and the power consumption or the electricity charge is calculated based on the current value detected by the current detection device and the drive time of the load. It is configured.

JP 2010-236760 A JP 2008-173152 A

  However, when the said structure is applied to the conventional rice cooker, there exists a subject that a rice cooker will enlarge.

  That is, the conventional rice cooker includes a plurality of heating devices for heating the pot. When one current detection device having the above-described configuration is provided in a conventional rice cooker, only the power consumption or the electricity charge of one heating device can be calculated. In this case, it is not possible to accurately calculate the power consumption or the electricity charge for cooking such as cooking rice. As a method for solving this problem, it is conceivable to provide a current detection device for each of the plurality of heating devices. However, in this case, as a matter of course, since the number of current detection devices increases, an installation area and a volume for that purpose are required. As a result, the rice cooker becomes large.

  Accordingly, an object of the present invention is to solve the above-described conventional problems, and to suppress the increase in the size of the rice cooker and to calculate the power consumption or the electricity charge for cooking more accurately. It is to provide.

In order to solve the conventional problem, the present invention comprises a pot for putting a cooked food,
A first heating device having a heating coil for inductively heating the pan, and an inverter circuit for supplying a high-frequency current to the heating coil;
A second heating device having a resistance heater for heating the pan, and a switching circuit for switching on / off of the resistance heater;
A current detection device for detecting a current value input to the inverter circuit;
A control device for controlling the first heating device and the second heating device;
A calculation device that calculates power consumption or electricity based on the current value detected by the current detection device;
A display device that displays the power consumption or electricity rate calculated by the calculation device;
With
The power consumption amount or the electricity charge calculated by the calculation device is the power consumption amount or electricity charge of the first heating device calculated based on the current value detected by the current detection device. Provided is a rice cooker that is a value obtained by adding an amount of electric power consumed or an electric charge consumed by the second heating device according to the driving time.

  According to the rice cooker according to the present invention, the quantity of the current detection device is made smaller than the quantity of the heating device, the enlargement of the rice cooker is suppressed, and the power consumption or the electricity charge for cooking is calculated more accurately. Can do.

These and other objects and features of the invention will become apparent from the following description taken in conjunction with the preferred embodiments with reference to the accompanying drawings. In this drawing,
FIG. 1 is a block diagram showing a configuration of a rice cooker according to the first embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the rice cooker according to the third embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of the rice cooker according to the fourth embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of the rice cooker according to the sixth embodiment of the present invention. FIG. 5: is a figure which shows the example which an electricity bill display apparatus displays an electricity bill at the time of completion | finish of rice cooking in the rice cooker concerning 7th Embodiment of this invention, FIG. 6 is a diagram showing an example in which the electricity bill display device displays the electricity bill at the end of heat retention in the rice cooker according to the seventh embodiment of the present invention. FIG. 7 is a diagram showing an example in which the electricity bill display device displays the electricity bill at the end of heat retention in the rice cooker according to the seventh embodiment of the present invention. FIG. 8: is a block diagram which shows the structure of the rice cooker concerning 8th Embodiment of this invention, FIG. 9 is a block diagram showing the configuration of the rice cooker according to the ninth embodiment of the present invention. FIG. In the rice cooker concerning 9th Embodiment of this invention, it is a figure which shows the example which displays two or more the log | history of the electricity bill spent at the time of the rice cooking or heat insulation which the electricity bill display apparatus performed in the past, FIG. 11: is a block diagram which shows the structure of the rice cooker concerning 9th Embodiment of this invention, FIG. 12 is a diagram showing an example in which the electricity bill display device accumulates the electricity bill for each cooked rice and displays it as a bar graph in the rice cooker according to the tenth embodiment of the present invention. FIG. 13: is a block diagram which shows the structure of the rice cooker concerning 11th Embodiment of this invention.

According to the first aspect of the present invention,
A first heating device having a heating coil for inductively heating the pan, and an inverter circuit for supplying a high-frequency current to the heating coil;
A second heating device having a resistance heater for heating the pan, and a switching circuit for switching on / off of the resistance heater;
A current detection device for detecting a current value input to the inverter circuit;
A control device for controlling the first heating device and the second heating device;
A power consumption calculation device that calculates power consumption based on a current value detected by the current detection device;
A power consumption display device that displays the power consumption calculated by the power consumption calculation device;
With
The power consumption calculated by the power consumption calculation device is the power consumption of the first heating device calculated based on the current value detected by the current detection device, and the driving time of the second heating device. Accordingly, a rice cooker having a value obtained by adding the amount of power consumed by the second heating device is provided.

  According to the second aspect of the present invention, the power consumption amount calculated by the power consumption amount calculation device is the power consumption amount of the first heating device calculated based on the current value detected by the current detection device. The rice cooking according to the first aspect, which is a value obtained by adding the amount of power consumed by the second heating device according to the driving time of the second heating device and the amount of power consumed according to the cooking time. Provide a bowl.

According to the third aspect of the present invention, it further comprises a voltage detection device for detecting an input voltage to the first heating device,
The power consumption amount calculation device according to the first aspect, wherein the power consumption amount calculation device calculates a power consumption amount of the first heating device based on a current value detected by the current detection device and a voltage value detected by the voltage detection device. Provide rice cookers.

According to the fourth aspect of the present invention,
A first heating device having a heating coil for inductively heating the pan, and an inverter circuit for supplying a high-frequency current to the heating coil;
A second heating device having a resistance heater for heating the pan, and a switching circuit for switching on / off of the resistance heater;
A current detection device for detecting a current value input to the inverter circuit;
A control device for controlling the first heating device and the second heating device;
An electricity bill calculating device that calculates an electricity bill based on the current value detected by the current detector;
An electricity bill display device that displays the electricity bill calculated by the electricity bill calculator;
With
The electricity bill calculated by the electricity bill calculation device is based on the electricity bill for the first heating device calculated based on the current value detected by the current detection device, according to the driving time of the second heating device. Provided is a rice cooker which is a charge obtained by adding an electricity charge spent by the second heating device.

  According to the fifth aspect of the present invention, the electricity bill calculated by the electricity bill calculating device is the same as the electricity bill applied to the first heating device calculated based on the current value detected by the current detector. The rice cooker according to the fourth aspect, which is a charge obtained by adding the electricity charge spent by the second heating device according to the driving time of the heating device of 2 and the electricity charge according to the cooking time. To do.

According to the sixth aspect of the present invention, it further comprises a voltage detection device for detecting an input voltage to the first heating device,
The said electricity bill calculation apparatus calculates the electricity bill concerning the said 1st heating apparatus based on the electric current value which the said electric current detection apparatus detected, and the voltage value which the said voltage detection apparatus detected, The 4th aspect is described. Provide rice cooker.

  According to the seventh aspect of the present invention, the electricity rate display device includes the electricity rate spent for cooking rice, the electricity rate spent for heat insulation, the electricity rate spent from the start of rice cooking to the end of heat insulation, the rice cooker from the start of operation of the rice cooker The rice cooker as described in the 4th aspect which displays either the electricity bill spent by the inside or the arbitrary period during heat retention is provided.

  According to the 8th aspect of this invention, the said electricity bill display apparatus displays the electricity bill spent by cooking rice automatically for the arbitrary fixed time at the time of the completion of rice cooking, and the information which shows having shifted to the heat retention state after that. The rice cooker according to the seventh aspect for display is provided.

According to the ninth aspect of the present invention, it further comprises a display instruction button for instructing display of the electricity rate,
When the display instruction button is pressed during the rice cooking operation or the heat retaining operation, the electricity price display device displays the electricity charge spent from the start of rice cooking until the display instruction button is pressed. Provide rice cooker.

According to a tenth aspect of the present invention, an electricity bill display instruction button for instructing display of the electricity bill;
A storage unit that stores the electricity price spent in the past for cooking rice or keeping warm,
Further comprising
The said electricity bill display apparatus displays the electricity bill spent at the time of the rice cooking performed in the past memorize | stored in the said memory | storage part when the said display instruction button was pushed in the standby state, or the rice cooking of 7th aspect Provide a bowl.

According to the eleventh aspect of the present invention, the storage unit associates and stores the rice cooking course or the heat insulation course corresponding to the executed rice cooking or the heat insulation together with the electricity charge spent at the time of rice cooking or the heat insulation executed in the past,
When the display instruction button is pressed in a standby state, the electricity price display device is a rice cooking course stored in the storage unit that has been executed in the past or spent during warming, and a rice cooking course associated with the electricity price. Or the rice cooker as described in a 10th aspect which displays a heat retention course is provided.

According to the twelfth aspect of the present invention, the storage unit stores, in association with the date of rice cooking or heat retention, the date and time when the rice cooking or heat insulation was performed, together with the electricity bill spent during the past.
When the display instruction button is pressed in a standby state, the electricity charge display device is stored in the storage unit in the past, and the electricity charge spent at the time of warming, and the date and time associated with the electricity charge, The rice cooker as described in a 10th aspect is displayed.

According to the thirteenth aspect of the present invention, further comprising a unit price input unit capable of inputting a unit price of the electricity bill,
The storage unit stores the unit price of the electricity bill input to the unit price input unit,
The said electricity bill calculation apparatus provides the rice cooker as described in a 10th aspect which calculates the electricity bill concerning cooking based on the unit price of the said electricity bill.

  According to the fourteenth aspect of the present invention, the unit price input unit calculates the unit price of the electricity charge for each time zone, every day of the week, every month, or for a certain period corresponding to the electricity charge contract conditions of the contracted electric power company. The rice cooker according to the thirteenth aspect, which can be input, is provided.

  According to the fifteenth aspect of the present invention, the electricity bill display device is configured to charge an electricity bill for each cooked rice, for each warming, for each cooked rice and for each warmth, for each bill for each day. , Every electricity bill spent in any period, every electricity bill spent every day of the week, every meal time period such as morning, noon, evening, evening, midnight, etc. The rice cooker according to the tenth aspect, which is accumulated and displayed every time.

According to the sixteenth aspect of the present invention, the communication device further comprises a communication device for communicating with an external communication terminal,
The said communication apparatus provides the rice cooker as described in the 11th or 12th aspect which communicates the information memorize | stored in the said memory | storage part to the said external communication terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(First embodiment)
Below, the rice cooker concerning 1st Embodiment of this invention is demonstrated. FIG. 1 is a block diagram showing the configuration of the rice cooker according to the first embodiment of the present invention.

  In FIG. 1, the rice cooker according to the first embodiment includes a pot 1, a first heating device 2, a second heating device 3, a first heating device 2, and a second heating device 3. And a control device 4 for controlling.

  The pan 1 is a container made of a magnetic material for storing a cooked product such as rice or water.

  The first heating device 2 includes a heating coil 21 that induction-heats the pan 1 and an inverter circuit 22 that supplies a high-frequency current to the heating coil 21. For example, the heating coil 21 is disposed in the vicinity of the bottom surface of the pan 1. Further, a temperature sensor (not shown) for detecting the temperature of the pan 1 is provided in the vicinity of the bottom surface of the pan 1.

  The second heating device 3 includes a resistance heater 31 that heats the pan 1 and a switching circuit 32 that switches on / off the resistance heater 31. The 2nd heating apparatus 3 is arrange | positioned at the side surface of the pan 1, for example. The resistance heater 31 heats the pan 1 from the side surface. When the resistance heater 31 is turned on, 100 W is consumed.

  The control device 4 includes a semiconductor element such as a CPU (Central Processing Unit). The control device 4 controls the power of the inverter circuit 22 and the on / off of the switching circuit 32 based on the temperature detected by the temperature sensor and the rice cooking sequence stored in advance.

  The control device 4 controls the current detection device 5, the power consumption calculation device 6, and the power consumption amount display device 7 based on a control program stored in advance.

  The current detection device 5 detects a current value input to the inverter circuit 22 of the first heating device 2. The current detection device 5 detects the current value input to the inverter circuit 22 by, for example, passing a current through the primary coil of the current transformer and AD converting the output value of the secondary coil of the current transformer. It is configured. The current detection device 5 may be configured to detect a current value input to the inverter circuit 22 using, for example, a semiconductor element dedicated to current detection.

  The power consumption calculation device 6 includes, for example, a semiconductor element for calculating power consumption. The power consumption calculation device 6 calculates the power consumption based on the current value detected by the current detection device 5. In the first embodiment, the power consumption calculation device 6 and the control device 4 are provided separately, but the present invention is not limited to this. For example, the control device 4 may include the function of the power consumption calculation device 6.

  The power consumption display device 7 is constituted by, for example, a liquid crystal display device (Liquid Crystal Display). The power consumption display device 7 displays the power consumption calculated by the power consumption calculation device 6.

  Next, power control of the first heating device 2 by the control device 5 will be described.

  In the first embodiment, the control device 4 controls the electric power of the first heating device 2 based on the current value detected by the current detection device 5. The control of the control device 4 so that the power of the first heating device 2 becomes the target power is performed in the following procedure, for example.

  First, the control device 4 once drives the inverter circuit 22 with power surely lower than the target power. The control device 4 reads the current value detected by the current detection device 5 at this time.

  Next, the control device 4 confirms the difference between the read current value and the current value assumed at the time of the target power (hereinafter referred to as the target current value). If the difference is large, the power of the first heating device 2 is confirmed. Inverter circuit 22 is driven so as to increase slightly. The control device 4 reads the current value detected by the current detection device 5 at this time.

  Next, the control device 4 confirms the difference between the read current value and the target current value. If the difference is large, the control device 4 drives the inverter circuit 22 so that the power of the first heating device 2 is slightly increased.

  Thereafter, the control device 4 repeats the same processing, and drives the inverter circuit 22 so that the power of the first heating device 2 gradually becomes the target power. In addition, it is about 0.3 to 1 second after a heating start that the electric power of the 1st heating apparatus 2 becomes a target electric power by such control of the control apparatus 4 in general. When the electric power of the first heating device 2 becomes the target electric power, the control device 4 drives the inverter circuit 22 so as to maintain the target electric power.

  Next, calculation of the power consumption amount of the first heating device 2 by the power consumption calculation device 6 will be described.

  In the first embodiment, the power consumption calculation device 6 integrates the product of the current value detected by the current detection device 5 and a preset value (for example, 100 V which is a fixed value of the input voltage). Then, the power consumption amount of the first heating device 2 is calculated.

  More specifically, the power consumption calculation device 6 obtains the product of the current value detected by the current detection device 5 every 0.1 second after the start of cooking and 100 V, which is a fixed value of the input voltage. Hereinafter, this product is referred to as instantaneous power.

  Thereafter, the power consumption calculation device 6 accumulates the instantaneous power every 0.1 seconds. Thereby, the power consumption of the first heating device 2 is calculated. Note that the power consumption calculated in this way is obtained by integrating the instantaneous power every 0.1 seconds, so if you want to calculate in units of watt seconds, calculate by dividing the power consumption by 10. be able to. Further, when it is desired to calculate in units of watt hours, the power consumption calculated in units of watt seconds can be calculated by dividing by 3600.

  Next, the reason why the power consumption calculation device 6 determines the instantaneous power based on the current value detected by the current detection device 5 every 0.1 seconds will be described.

  In the first embodiment, since the control device 4 controls the inverter circuit 22 so that the electric power of the first heating device 2 gradually approaches the target electric power, for about 0.3 to 1 second from the start of heating. The power is not stable. Hereinafter, this period is referred to as a transition period. For this reason, if the power consumption calculation device 6 determines the instantaneous power based on the current value detected by the current detection device 5 every second, for example, the power consumption during the transition period cannot be calculated correctly. That is, there is a difference between the power consumption calculated by the power consumption calculation device 6 and the actual power consumption.

  When the control device 4 controls the inverter circuit 22 so that the first heating device 2 maintains the target power for a long time, the difference can be ignored. However, when the control device 4 performs control for frequently switching from on to off and from off to on, such as repeating 1 second on and 1 second off, the difference is accumulated, and finally The difference increases to a level that cannot be ignored.

  For this reason, in the first embodiment, the interval at which the power consumption calculating device 6 obtains the instantaneous power is set to 0.1 seconds, which is ½ or less of the transient period, to reduce the difference.

  In the first embodiment, the control device 4 acquires information on the power consumption of the second heating device 3 and outputs the information to the power consumption calculation device 6.

  When a resistance heater having a power consumption of 100 W per unit time is used as the resistance heater 31 of the second heating device 3, a power of 3600 Ws (= 1 Wh) every 36 seconds when the resistance heater 31 is driven for 36 seconds. Is consumed. That is, since the power of a resistance load such as the resistance heater 31 is stable from the start of driving, the power consumption of the resistance heater 31 is proportional to the driving time.

  For this reason, the power consumption of the second heating device 3 is calculated by multiplying the driving time of the second heating device 3 and the power consumption per unit time of the resistance heater 31 without providing a separate current detection device. By doing so, it can be obtained accurately.

  Therefore, in the first embodiment, the power consumption calculated by the power consumption calculation device 6 is equal to the power consumption of the first heating device 2 calculated based on the current value detected by the current detection device 5. The power consumption amount consumed by the second heating device 3 is added according to the driving time of the second heating device 3.

  Thereby, while reducing the quantity of the electric current detection apparatus 5 from the quantity of the heating apparatuses 2 and 3, suppressing the enlargement of a rice cooker, the power consumption concerning cooking can be calculated more correctly.

(Second Embodiment)
Next, the rice cooker concerning 2nd Embodiment of this invention is demonstrated.

  The difference between the rice cooker according to the second embodiment and the rice cooker according to the first embodiment is that the power consumption calculated by the power consumption calculation device 6 is based on the current value detected by the current detection device 5. To the calculated power consumption of the first heating device 2, the power consumption consumed by the second heating device 3 according to the driving time of the second heating device 3, and the power consumption corresponding to the cooking time The value obtained by adding is used as the power consumption calculated by the power consumption calculation device 6.

  Here, the “power consumption according to cooking time” means a fan motor (not shown) that cools parts other than the first and second heating devices 2 and 3, for example, the inverter circuit 22 during the cooking operation. ) And power consumption consumed by power supply circuits.

  During the cooking operation, even if a load with high power consumption such as the heating coil 21 and the resistance heater 31 is turned off, power of about several watts is consumed by components such as a fan motor and a power supply circuit. For example, when this power is 3 W, the power consumption after 1200 seconds is 3600 Ws (= 1 Wh), and the power consumption after 60 minutes is 3 Wh.

  According to the rice cooker concerning this 2nd Embodiment, since it is trying to add the power consumption according to such cooking time, the power consumption concerning cooking can be calculated more correctly.

  Note that the addition of the power consumption according to the cooking time may be performed after measuring the cooking time from the start to the end of cooking, or the time is counted from the start of cooking and the addition is performed at regular intervals. May be. For example, when the power consumed by components such as a fan motor and a power supply circuit is 3 W, a power consumption of 0.1 Wh is added every 120 seconds from the start of cooking, or 1 Wh is added every 1200 seconds. Also good.

(Third embodiment)
Next, the rice cooker concerning 3rd Embodiment of this invention is demonstrated. FIG. 2 is a block diagram showing the configuration of the rice cooker according to the third embodiment of the present invention.

  The difference between the rice cooker according to the third embodiment and the rice cooker according to the first embodiment is that the rice cooker further includes a voltage detection device 8 that detects the input voltage of the inverter circuit 22, and the power consumption calculation device 6 has a current. The power consumption of the first heating device 2 is calculated based on the current value detected by the detection device 5 and the current value detected by the voltage detection device 8.

  The voltage detection device 8 divides the input voltage of the inverter circuit 22 by resistance and inputs the divided value to an AD converter included in the control device 4 to calculate a voltage value. This voltage value is used when the control device 4 controls the power of the first heating device 2. The control device 4 reduces the target current value when the input voltage is higher than 100V, and increases the target current value when the input voltage is lower than 100V. Control is performed so that the power approaches the target power as much as possible.

  The voltage value detected by the voltage detection device 8 is also output to the power consumption calculation device 6. In the third embodiment, the power consumption calculation device 6 calculates the product of the current value detected by the current detection device 5 and the voltage value detected by the voltage detection device 8, thereby obtaining the first heating device 2. Calculate power.

  According to the rice cooker concerning this 3rd Embodiment, even if the input voltage of the inverter circuit 22 fluctuates, calculation of the power consumption of the 1st heating apparatus 2 can be performed more correctly.

(Fourth embodiment)
Next, the rice cooker concerning 4th Embodiment of this invention is demonstrated. FIG. 3 is a block diagram showing the configuration of the rice cooker according to the fourth embodiment of the present invention.

  The difference between the rice cooker according to the fourth embodiment and the rice cooker according to the first embodiment is that, instead of the power consumption calculation device 6 and the power consumption display device 7, an electricity bill calculation device 9 and an electricity bill are used. And a display device.

  In FIG. 3, the electricity bill calculating device 9 calculates the electricity bill for cooking based on the current value detected by the current detector 5. For example, the electricity bill calculation device 9 uses the second heating device 3 as the power consumption amount of the first heating device 2 calculated based on the current value detected by the current detection device 5 every 0.1 second after the start of cooking. The power consumption is calculated by adding the power consumption consumed by the second heating device 3 in accordance with the driving time and multiplying the corrected power consumption by a predetermined unit price of electricity.

  For example, when the electricity cost per kWh is 23 yen and the power consumption is 0.5 kWh, the electricity charge can be calculated as 11.5 yen. Since the calculation method of the power consumption is the same as the calculation method described in the first embodiment, the description is omitted.

  The electricity rate display device 10 is constituted by a liquid crystal display device, for example. The electricity bill display device 10 displays the electricity bill calculated by the electricity bill calculation device 9.

  According to the rice cooker concerning this 4th Embodiment, since the electric bill of the 1st and 2nd heating apparatuses 2 and 3 can be computed by one current detection device 5, while suppressing the enlargement of a rice cooker. The electricity bill for cooking can be calculated more accurately.

  In addition, in this 4th Embodiment, although the electricity bill calculation apparatus 9 calculates | requires the power consumption concerning cooking, it calculates the electricity bill by multiplying the said power consumption with the electricity unit price, The present invention is not limited to this. For example, a configuration may be adopted in which a coefficient for directly obtaining an electricity bill is multiplied from a current value every 0.1 seconds, and the value is integrated. Even in this case, the same effect can be obtained. In this case, it is preferable to correct the value by multiplying a predetermined coefficient in accordance with the driving time of the second heating device 3.

  In the fourth embodiment, the electricity bill calculation device 9 calculates the electricity bill. However, the control device 4 may be configured to include the function of the electricity bill calculation device 9.

(Fifth embodiment)
Next, the rice cooker concerning 5th Embodiment of this invention is demonstrated.

  The difference between the rice cooker according to the fifth embodiment and the rice cooker according to the fourth embodiment is that the electric charge of the first heating device calculated based on the current value detected by the current detection device 5 is the second. A value obtained by adding the electricity charge spent by the second heating device 3 in accordance with the driving time of the heating device 3 and the electricity charge in accordance with the cooking time is used as the electricity charge calculated by the electricity bill calculation device 6. Is a point.

  Here, the “electricity charge according to cooking time” means a fan motor (not shown) that cools parts other than the first and second heating devices 2 and 3, for example, the inverter circuit 22 during the cooking operation. Electricity costs consumed by power supply circuits.

  According to the rice cooker concerning this 5th Embodiment, since the electricity bill according to such cooking time is added, the electricity bill concerning cooking can be calculated more correctly.

(Sixth embodiment)
Next, the rice cooker concerning 6th Embodiment of this invention is demonstrated. FIG. 4: is a block diagram which shows the structure of the rice cooker concerning 6th Embodiment of this invention.

  The difference between the rice cooker according to the sixth embodiment and the rice cooker according to the fourth embodiment is that the rice cooker further includes a voltage detection device 8 that detects the input voltage of the inverter circuit 22, and the electricity rate calculation device 9 is a current detection device. It is the point which is comprised so that the electricity bill of the said 1st heating apparatus 2 may be calculated based on the electric current value which the apparatus 5 detected, and the electric current value which the voltage detection apparatus 8 detected.

  The voltage detection device 8 divides the input voltage of the inverter circuit 22 by resistance and inputs the divided value to an AD converter included in the control device 4 to calculate a voltage value. This voltage value is used when the control device 4 controls the power of the first heating means 2. The control device 4 lowers the target current value when the input voltage is higher than 100V, and increases the target current value when the input voltage is lower than 100V, so that the power of the first heating device 2 can be controlled against fluctuations in the input voltage. Is controlled as close to the target power as possible.

  The voltage value detected by the voltage detection device 8 is also output to the electricity bill calculation device 9. In the sixth embodiment, the electricity bill calculation device 9 calculates the power of the first heating device 2 by calculating the product of the current value detected by the current detection device 5 and the voltage value detected by the voltage detection device 8. And the electric power consumption of the 1st heating apparatus 2 is calculated by integrating | accumulating the said electric power. Furthermore, the electricity bill calculation device 9 calculates the electricity bill for cooking by multiplying the power consumption by a predetermined electricity bill.

  According to the rice cooker concerning this 6th Embodiment, even if the input voltage of the inverter circuit 22 fluctuates, the calculation of the electricity bill concerning the 1st heating apparatus 2 can be performed more correctly.

(Seventh embodiment)
Next, the rice cooker concerning 7th Embodiment of this invention is demonstrated.

  The difference between the rice cooker according to the seventh embodiment and the rice cooker according to the fourth embodiment is that the electricity charge display device 10 displays the electricity charge at a specific timing shown below.

  In the seventh embodiment, the electricity bill calculating device 9 calculates the electricity bill spent on cooking rice (the electricity bill spent from the start of cooking to the end of cooking). The electricity bill display device 10 automatically displays the electricity bill spent on the rice cooking calculated by the electricity bill calculation device 9 at the end of rice cooking. For example, when the electricity charge is about 6.2 yen, the electricity charge display device 10 displays the electricity charge as shown in FIG.

  Moreover, the electricity bill display apparatus 10 displays the said electricity bill for arbitrary fixed time (for example, 6 minutes) from the completion of rice cooking. Thereafter, the electricity bill display device 10 displays information indicating that the state has shifted to the heat insulation state.

  In the seventh embodiment, the electricity bill calculating device 9 calculates the electricity bill spent for the heat insulation (the electricity bill spent from the heat insulation start to the heat insulation end). The electricity bill display device 10 displays the electricity bill spent for the heat insulation calculated by the electricity bill calculation device 9 at the end of the heat insulation. For example, when the electricity charge is 1.2 yen, the electricity charge display device 10 displays the electricity charge as shown in FIG.

  The electricity bill display device 10 displays the electricity bill for an arbitrary fixed time (for example, one minute) from the end of rice cooking. Thereafter, the electricity rate display device 10 displays information indicating that the state has shifted to a normal standby state (a state in which neither rice cooking nor heat insulation is performed).

  According to the rice cooker according to the seventh embodiment, it is possible to easily know how much electricity cost is spent for cooking rice and keeping warm.

  Moreover, according to the rice cooker concerning this 7th Embodiment, the electricity bill display apparatus 10 automatically displayed the electricity bill spent on cooking rice for the arbitrary fixed time at the time of the end of rice cooking, and moved to the heat retention state after that. To show information. Thereby, although it is a heat retention state, an electricity bill is displayed and it can suppress that the problem that it cannot grasp | ascertain easily what kind of state the rice cooker is now is produced.

  At the end of the heat insulation, the user is near the rice cooker in order to stop the heat insulation operation by the user himself pressing the off button. On the other hand, at the end of rice cooking, the rice cooking operation automatically stops, so the user may not be near the rice cooker. For this reason, it is preferable that the electricity bill display device 10 displays the time for displaying the electricity bill spent for cooking rice longer than the electricity bill spent for heat insulation.

  Moreover, in this 7th Embodiment, although the electricity bill spent for cooking rice and the electricity bill spent for heat retention were displayed, this invention is not limited to this. For example, as shown in FIG. 7, the electricity bill spent from the start of cooking to the end of heat retention may be displayed. Further, for example, the electricity charge spent from the start of cooking rice to the end of heat insulation and the electricity charge spent for heat insulation may be displayed simultaneously. For example, you may make it display the electric bill spent from the operation start of the rice cooker to the arbitrary period during rice cooking or heat retention. Thereby, a user's usability can be improved.

(Eighth embodiment)
Next, the rice cooker concerning 8th Embodiment of this invention is demonstrated. FIG. 8: is a block diagram which shows the structure of the rice cooker concerning 8th Embodiment of this invention.

  The rice cooker according to the eighth embodiment is different from the rice cooker according to the fourth embodiment in that a display instruction button 51 is further provided.

  The display instruction button 51 is a button for displaying an electricity bill, for example. When the display instruction button 51 is pressed while the rice cooking operation or the heat retention operation is being performed, the electricity charge calculation device 9 calculates the electricity charge spent from the start of rice cooking or the heat retention until the display instruction button 51 is pressed. . The electricity bill display device 10 displays the electricity bill calculated in this way by the electricity bill calculation device 9 for an arbitrary fixed time.

  According to the rice cooker concerning this 8th Embodiment, since the electricity bill spent so far can be known in the middle of rice cooking operation | movement or heat retention operation | movement, a user's convenience can be improved further.

(Ninth embodiment)
Next, the rice cooker concerning 9th Embodiment is demonstrated. FIG. 9: is a block diagram which shows the structure of the rice cooker concerning 9th Embodiment of this invention.

  The rice cooker according to the ninth embodiment is different from the rice cooker according to the eighth embodiment in that a storage unit 52 is further provided.

  The storage unit 52 includes, for example, a flash memory. The memory | storage part 52 memorize | stores the electricity bill spent at the time of the rice cooking performed in the past (previous or before) or heat retention.

  When the display instruction button 51 is pressed in a standby state in which neither the rice cooking operation nor the heat insulation operation is performed, the electricity bill calculation device 9 reads the rice cooked in the past stored in the storage unit 52 or the electricity bill spent during the heat insulation. . The electricity bill display device 10 displays the electricity bill.

  According to the rice cooker concerning this 9th Embodiment, since the electric bill spent at the time of rice cooking performed in the past or heat retention can be known, a user's convenience can be improved further.

  In the ninth embodiment, as shown in FIG. 10, it is preferable that the electricity bill display device 10 displays a plurality of history of electricity bills spent during past cooking or heat retention. Thereby, a user's usability can be improved further.

  In addition, in the ninth embodiment, as shown in FIG. 10, the electricity price display device 10 has a rice cooking course or heat insulation corresponding to the executed rice cooking or heat keeping, together with the electricity charge spent at the time of rice cooking or heat insulation executed in the past. It is preferable to display the course. Thereby, a user's usability can be improved further. In this case, the rice cooking course or the heat insulation course corresponding to the executed rice cooking or the heat insulation may be associated with the electricity price spent at the time of rice cooking or the heat insulation executed in the past and stored in the storage unit 51 in advance.

  Moreover, in this 9th Embodiment, as shown in FIG. 10, the electricity bill display apparatus 10 may display the date which performed the said rice cooking or heat retention with the electric charge spent at the time of rice cooking or heat insulation performed in the past. preferable. Thereby, a user's usability can be improved further. In addition, in this case, the date and time when the rice cooking or heat insulation is performed may be associated with the electricity price spent at the time of rice cooking or heat insulation performed in the past, and stored in the storage unit 51 in advance.

(10th Embodiment)
Next, the rice cooker concerning 10th Embodiment of this invention is demonstrated. FIG. 11: is a block diagram which shows the structure of the rice cooker concerning 10th Embodiment of this invention.

  The rice cooker according to the tenth embodiment is different from the rice cooker according to the ninth embodiment in that the rice cooker further includes a unit price input unit 53 capable of inputting the unit price of the electricity bill.

  The unit price input unit 53 may be a button mounted on the rice cooker or may receive information related to the unit price of the electricity bill from a mobile phone, an external server, or the like. The unit price of the electricity bill input to the unit price input unit 53 is stored in the storage unit 52. The electricity bill calculation device 9 calculates the electricity bill for cooking based on the unit price of the electricity bill stored in the storage unit 52.

  According to the rice cooker according to the tenth embodiment, a more accurate electric charge can be calculated even when the electric charge varies depending on the region.

  In addition, it is preferable that the unit price input unit 53 can input the unit price of the electricity charge for each time zone, every day of the week, every month, or every certain period corresponding to the electricity charge contract conditions of the contracted electric power company. As a result, more accurate electricity charges can be calculated not only when the electricity charges differ depending on the region or the like, but also when the electricity charges differ depending on the time zone or day of the week.

  In addition, the electricity bill display apparatus 10 is the electricity bill spent for any period of time, for every cooked rice, for each warming, for each cooked rice and for each warming, for every billed electricity spent per day. To be displayed cumulatively for each charge, for each electricity price spent on each day of the week, for each meal time zone such as morning, noon, evening, evening, and midnight, or for each unit price set by the contracted power company Is preferred. As a result, the user can easily understand the electricity bill visually. FIG. 12 shows an example in which the electricity charges are accumulated for each cooked rice and displayed as a bar graph.

(Eleventh embodiment)
Next, the rice cooker concerning 11th Embodiment is demonstrated. FIG. 13: is a block diagram which shows the structure of the rice cooker concerning 11th Embodiment of this invention.

  The rice cooker according to the eleventh embodiment is different from the rice cooker according to the ninth embodiment in that a communication device 54 is further provided.

  The communication device 54 communicates with an external communication terminal such as a mobile phone or an external server. More specifically, the communication device 54 modulates, demodulates, encodes, decodes, etc., a radio signal transmitted / received to / from an external communication terminal. Examples of the wireless communication method of the communication device 54 include a communication method using RFID (Radio Frequency Identification), Bluetooth (registered trademark), and the like.

  In the eleventh embodiment, the storage unit 52 performs a rice cooking course or a heat insulation course corresponding to the executed rice cooking or heat retention, or a date and time when the rice cooking or heat insulation is executed, together with the electricity price spent at the time of rice cooking or heat insulation executed in the past. Are stored in association with each other. The communication device 54 communicates information stored in the storage unit 52 to an external communication terminal.

  According to the rice cooker according to the eleventh embodiment, a mobile phone, an external server, or the like can manage the electricity bill.

  Note that the communication device 54 may communicate with a communication terminal using a wired communication method instead of a wireless communication method. Further, the communication device 54 may be capable of Internet connection by, for example, the PCT / IT protocol.

  It is to be noted that, by appropriately combining any of the various embodiments, the effects possessed by them can be produced.

  While the invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

  The rice cooker according to the present invention suppresses an increase in the size of the rice cooker and can more accurately calculate the power consumption or the electricity charge for cooking, and thus has the function of displaying the power consumption or the electricity charge. Useful for vessels.

DESCRIPTION OF SYMBOLS 1 Pan 2 1st heating apparatus 3 2nd heating apparatus 4 Control apparatus 5 Current detection apparatus 6 Power consumption calculation apparatus 7 Power consumption display apparatus 8 Voltage detection apparatus 9 Electricity charge calculation apparatus 10 Electricity charge display apparatus 21 Heating coil 22 Inverter circuit 31 Resistance heater 32 Switching circuit 51 Display instruction button 52 Storage unit 53 Unit price input unit 54 Communication device

Claims (2)

A pot for cooking,
A first heating device having a heating coil for inductively heating the pan, and an inverter circuit for supplying a high-frequency current to the heating coil;
A second heating device having a resistance heater for heating the pan, and a switching circuit for switching on / off of the resistance heater;
A current detection device for detecting a current value input to the inverter circuit;
A control device for controlling the first heating device and the second heating device;
An electricity bill calculation device that calculates an electricity bill based on the current value detected by the current detection device;
An electricity bill display device that displays the electricity bill calculated by the electricity bill calculator;
A unit price input unit that can input the unit price of electricity charges;
A communication device for communicating with an external communication terminal;
With
The electricity bill calculated by the electricity bill calculation device is based on the electricity bill for the first heating device calculated based on the current value detected by the current detection device, according to the driving time of the second heating device. It is a charge obtained by adding an electricity charge spent by the second heating device,
The said unit price input part is a rice cooker which receives the information regarding the unit price of an electricity bill from the said external communication terminal via the said communication apparatus. A storage unit for storing the unit price of the electricity charge;
Further comprising
The rice cooker according to claim 1, wherein the electricity bill calculation device calculates an electricity bill for cooking based on a unit price of the electricity bill stored in the storage unit.

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