JP2009178362A - Cooking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooking apparatus which suppresses power consumption lower by heating control complying with a fare reduction plan supplied from a power company. <P>SOLUTION: The cooking apparatus has heating arrangement (electric heater 4), control arrangement for heating control of the heating arrangement (electric heater 4) and display arrangement (liquid crystal display device) for displaying the state of use, time and the like of the heating arrangement (electric heater 4). The control arrangement is so arranged as to carry out the heating control of the heating arrangement (electric heater 4) under a time slot to match the fare reduction plan supplied from the power company. This ensures the heating control of the heating arrangement (electric heater 4) under the time slot to match the fare reduction plan supplied from the power company. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cooking utensil comprising heating means, control means for controlling heating of the heating means, and display means for displaying the use state and time of the heating means.

  In recent years, eco hot water supply using cheap late-night electricity has become widespread, and an increasing number of consumers are trying to use electrical products in low-cost hours late at night in all-electric households.

  However, in the case of this kind of conventional cooking utensils, the cooking utensils are not used in the above-mentioned low-cost time zone at midnight. For example, the user generally uses the cooking utensils as needed. For example, in the case of an electric hot water storage container that is one of cooking utensils, extremely large electric power is required at the time of boiling, but boiling has been performed regardless of time (see Patent Document 1).

JP 2002-272613 A.

  The present invention has been made in view of the above points, and is to provide a cooking utensil that can keep the power consumption fee low by performing heating control in accordance with a low rate plan provided by an electric power company. It is the purpose.

  In the present invention, as a first means for solving the above-mentioned problems, a heating means, a control means for controlling the heating of the heating means, and a display means for displaying the use state and time of the heating means are provided. In the cooking utensil, the control means is configured to perform heating control of the heating means along a time zone suitable for a low price plan provided by an electric power company.

  With the configuration described above, heating control of the heating means is performed along a time zone suitable for a low-price plan provided by the electric power company, so that it is possible to reduce the electricity usage fee at home.

  In the present invention, as a second means for solving the above-described problem, in the cooking utensil provided with the first means, the display means is set to indicate which of the charge plans provided by the electric power company the current time is. It can also be configured to be able to display whether it is a time zone, in which case it is possible to inform the user of which charge time zone the current time is by checking the display on the display means This makes it easier for the user to determine the usage time zone of the cooking utensil.

  In the present invention, as a third means for solving the above-described problem, in the cooking utensil provided with the first or second means, the display means can display the use state of the heating means. In such a case, by confirming the display on the display means, the user can be informed of the use state of the heating means, and the user can easily confirm the use state of the cooking utensil. .

  In the present invention, as a fourth means for solving the above problems, in the cooking utensil provided with the first, second or third means, a setting means for setting a finishing time is attached, When the finishing time set by the setting means is out of the minimum charge zone in the low charge plan, the display of the display means can be changed so that the display is finished within the minimum charge band. In such a case, by changing the display so that the display on the display means is finished within the minimum charge time zone, it is possible to inform the user of an error in the setting by the setting means, and the finish time of the cooking utensil is always It can be reset within the minimum charge period.

  In the present invention, as a fifth means for solving the above-mentioned problems, in the cooking utensil provided with the first, second, third or fourth means, the control means is set in the low-price plan. It can be configured so that it can be controlled to enter a mode that requires a large amount of power consumption before the end of the low charge period, and to maintain the state in the normal charge period and the high charge period. When configured, it can be controlled to enter a mode that requires large power consumption before the end of the low charge period in the low charge plan, and to maintain that state in the normal charge time period and the high charge time period, It is possible to further reduce the electricity usage fee at home.

  According to the first means of the present invention, in a cooking utensil comprising a heating means, a control means for performing heating control of the heating means, and a display means for displaying a use state and time of the heating means, The control means is configured to be able to perform heating control of the heating means along a time zone suitable for a low price plan provided by the electric power company, and along a time zone suitable for the low price plan provided by the electric power company. Since the heating control of the heating means is performed, there is an effect that it is possible to reduce the electricity usage fee at home.

  As in the second means of the present invention, in the cooking utensil provided with the first means, the display means displays the time zone for each rate plan provided by the electric power company. In such a case, by confirming the display on the display means, it is possible to inform the user of which charge time zone the current time is and Can be easily determined by the user.

  As in the third means of the present invention, in the cooking utensil provided with the first or second means, the display means can be configured to display the use state of the heating means, When comprised in this way, by confirming the display on a display means, a user can be notified of the use condition of a heating means, and it becomes easy for a user to confirm the use condition of a cooking utensil.

  As in the fourth means of the present invention, in the cooking utensil provided with the first, second or third means, a setting means for setting the finishing time is attached, and the finishing time set by the setting means Can be configured so that the display of the display means can be changed so that the display is finished within the minimum fee zone when the minimum fee zone in the low fee plan is deviated. By changing the display of the display means so that it is finished within the minimum charge time zone, it is possible to inform the user of the setting error by the setting means, and the finish time of the cooking utensil is always set within the minimum charge time zone. You can fix it.

  As in the fifth means of the present invention, in the cooking utensil provided with the first, second, third or fourth means, the control means is large before the low charge time period in the low charge plan ends. It can be configured to enter a mode that requires power consumption, and can be controlled to maintain its state in the normal charge time zone and the high charge time zone. It will be possible to enter a mode that requires a large amount of power consumption before the end of the low charge period, and to maintain that state in the normal charge period and the high charge period. Reduction can be achieved.

  Hereinafter, some preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1st Embodiment The electric hot water storage container which is a specific example of the cooking utensil concerning the 1st Embodiment of this invention is shown by FIG. 1 thru | or FIG.

  As shown in FIG. 1, this electric hot water storage container heats a container body 1 having an inner container 3 for boiling water, a lid body 2 that opens and closes an upper opening of the container body 1, and a bottom portion of the inner container 3. An electric heater 4 as a heating means, a hot water supply passage 5 for supplying hot water in the inner container 3 to the outside, and an electric pump 6 as a pump device provided in the middle of the hot water supply passage 5. It is configured.

  The container body 1 includes an outer case 7 made of a synthetic resin that forms an outer surface, an inner container 3 that forms an inner peripheral surface, and an upper portion of the outer case 7 and an upper portion of the inner container 3. It consists of an annular shoulder member 8 made of plastic and a bottom plate 9 made of synthetic resin that constitutes the bottom surface.

  The inner container 3 is composed of a vacuum double container formed by forming a vacuum space 12 between a stainless steel bottomed cylindrical inner cylinder 10 and a stainless steel substantially cylindrical outer cylinder 11, A non-vacuum part 3a consisting only of the bottom part of the inner cylinder 10 is formed at the bottom part. The electric heater 4 (for example, a mica heater in which a heating element is held on a mica plate) is attached to the lower surface of the non-vacuum portion 3a. Reference numeral 13 denotes a temperature sensor that acts as a temperature detecting means for detecting the temperature of the inner container 3 (in other words, the hot water temperature T).

  The lid body 2 is composed of a synthetic resin upper plate 14 and a synthetic resin lower plate 15 whose outer peripheral edge is coupled to the upper plate 14 by fitting. The hinge receiver 16 is supported by a hinge pin 17 so as to be opened and closed and detachable.

  The lid 2 is provided with an air pump 18 that is driven by a manual operation so that hot water can be supplied through the hot water supply passage 5 even when no power source is connected. The air pump 18 is of a bellows type disposed in a cylindrical recess 19 formed in a substantially central portion of the lid 2 and is pressed by a pressing operation via a pressing plate 20. Pressurized air is blown into the inner container 3, and hot water in the inner container 3 is pushed out through the hot water supply passage 5 by the pressure of the pressurized air. Reference numeral 21 denotes a steam discharge passage, and reference numeral 22 denotes an overturn stop water valve disposed in the middle of the steam discharge passage 21.

  A metal cover member 23 is fixed to the lower plate 15 of the lid 2, and the outer peripheral edge of the cover member 23 is connected to the water supply port 3 b of the inner container 3 when the lid 2 is closed. A seal packing 24 to be pressed is provided.

  The electric pump 6 is disposed in the middle of the hot water supply passage 5 and below the inner container 3. Further, in the middle of the hot water supply passage 5 and at a position above the full water level display portion 25, a falling stop water valve 26 and a forward tilting stop water valve 27 are provided.

  The electric hot water storage container having the above configuration supplies power to the boiling heater 4A and the heat retaining heater 4B in addition to the normal heat retaining mode (in other words, the set heat retaining temperature control mode) for controlling the power to the heat retaining heater 4B. It can be used in a thermos warming mode in which heat is kept in a stopped state (for example, with the power cord removed).

  In FIG. 1, reference numeral 28 denotes a lock mechanism for holding the lid 2 in a closed state with respect to the container body 1, 29 denotes an operation panel unit having various switches described later, and 30 denotes a switch board.

  As shown in FIG. 2, the operation panel 29 includes a hot water supply switch 31, a lock release switch 32, a reboiling switch 33, a heat retention selection switch 34, a midnight power mode switch 35, a liquid crystal display device 36, and a reboiling indicator light 37. A heat retention indicator lamp 38, a midnight power mode selection indicator lamp 39, a low fee zone indicator lamp 40, a standard fee zone indicator lamp 41, and a high fee zone indicator lamp 42 are provided. Here, the midnight power mode is a mode that is selected when you want to use discounted midnight power (from 23:00 to 7:00 the next morning) provided by the power company. The low charge zone is provided by the power company. It is used in a low charge time zone (for example, from 23:00 to 7:00 the next morning) in the price plan to be used. The standard charge zone is a standard charge time zone (for example, Weekdays: 7:00 to 10:00 and 17:00 to 23:00, holidays: 7:00 to 23:00). High charge zone means a high charge time zone in the price plan provided by the power company ( For example, use on weekdays: 10:00 to 17:00. On the liquid crystal display device 36, the use state, temperature, boiling remaining time and amount of hot water of the electric heater 4 as a heating means are alternately displayed in 7 segments.

  FIG. 3 is a block diagram showing a connection state of electrical elements in the electric hot water storage container according to the present embodiment. In addition, about the electrical element already demonstrated, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In FIG. 3, reference numeral 43 is a microcomputer board that acts as control means and setting means, 44 is an AC power supply, 45 is a thermal fuse, 46 is a triac, 47 is a relay, and 48 is a resistor.

  In the electric hot water storage container configured as described above, the following operational effects are obtained.

  When the midnight power mode switch 35 is turned ON, the heating control of the electric heater 4 is performed along a time zone suitable for the low price plan provided by the power company.

  For example, the time between the use time zone start time of “Tokuko-san course” that performs ON / OFF control of the electric heater according to the life pattern of the user and the time zone when the charge is high in the charge plan provided by the power company If it is within the predetermined time t, the control of the electric heater 4 is started in a time zone where the price plan is cheaper ahead of the use time zone start time of the “Tokuko-san course” (see FIG. 4). In the case of FIG. 4, the low charge time zone of the electric power company is from 23:00 to 6:00, and the use time zone start time of the “Tokuko-san course” is 7:00.

  If it does in this way, heating control of the electric heater 4 will be performed along the time slot | zone according to the low charge plan which an electric power company provides, and reduction of the electric power usage charge at home can be aimed at.

  That is, low charge time zone (for example, from 23:00 to 7 o'clock): set temperature or thermos bottle temperature + boiling control before the end of the time zone, standard charge time zone (for example, weekdays: 7 o'clock to 10 o'clock and 17 o'clock to 23 o'clock) Hours, holidays: 7:00 to 23:00): set temperature insulation, high charge time zone (for example, weekdays: 10:00 to 17:00): forced thermos insulation or set temperature insulation.

  At this time, the low charge zone indicator lamp 40, the standard charge zone indicator lamp 41, and the high charge zone indicator lamp 42, which act as display means, are turned on, so that the current time is in which time zone for each rate plan provided by the power company. Is displayed. When “green”, “yellow”, and “red” light-emitting LEDs are used as the indicator lights 40 to 42, the user's display recognition becomes clearer. Note that the emission color may be changed to “green”, “yellow”, and “red” depending on the charge time zone by one three-color LED.

Next, boiling heating in the present embodiment will be described with reference to the flowcharts shown in FIGS.
(1) Boiling control in the midnight power mode (refer to the flowchart in FIG. 5)
When it is confirmed in step S1 that the midnight power mode switch 35 has been turned ON, the automatic boiling scheduled time is displayed on the liquid crystal display device 36 in step S2. The scheduled automatic boiling time is set to the time when boiling is completed before the end of the low charge time period in the charge plan provided by the electric power company by the setting means. Next, in step S3, it is determined whether or not the current time has reached the scheduled boiling time. If an affirmative determination is made here, the process proceeds to a boiling process in step S4.

If it does in this way, the boiling process which requires big power consumption will be performed before the end of a low charge time zone, and it can aim at the further reduction of the electric power usage charge at home.
(2) Boiling control during re-boiling (refer to the flowchart in FIG. 6)
If it is confirmed that the reboiling switch 33 is turned on in step S1 during the heat retaining process, it is determined in step S2 whether or not the midnight power mode is in progress. If a negative determination is made here, in step S3. Although the process proceeds to the re-boiling process, if an affirmative determination is made, it is determined in step S4 whether or not it is a low charge time zone in the charge plan provided by the electric power company. Here, if an affirmative determination is made, the process proceeds to re-boiling affirmation in step S5, but if a negative determination is made, the timer starts operating in step S6, an alarm of “beep” is issued in step S7, and step S8. , “Low-fee out-of-period re-boiling OK?” Is displayed on the liquid crystal display device 36. Next, in step S9, it is determined whether or not the re-boiling switch 33 is turned on again. If an affirmative determination is made here, the process proceeds to re-boiling affirmation in step S10, but if a negative determination is made, in step S11. When it is confirmed that the timer has elapsed for 3 seconds, the display of “low-fee out-of-period re-boiling OK?” On the liquid crystal display device 36 is canceled in step S12, and the process returns to the heat retaining process in step S13.

  As described above, when the re-boiling switch 33 is turned on when the midnight power mode is selected, the re-boiling is executed only in the minimum necessary case. Therefore, it is possible to further reduce the electricity usage fee at home. Further, by changing the display of the liquid crystal display device 36, which is a display means, so as to be finished within the minimum charge time zone, it is possible to inform the user of an error in setting by the microcomputer board 34 acting as the setting means. You can always reset the finish time within the minimum charge time zone.

Second Embodiment FIGS. 7 to 9 show an electric rice cooker which is a specific example of a cooking utensil according to a second embodiment of the present invention.

  As shown in FIG. 7, this electric rice cooker is configured to be able to take out an inner pot 53 containing rice and water so as to be freely removable, and has a double structure rice cooker body 51 having a space portion, And a lid 52 that covers the upper opening of the rice cooker body 51 so as to be freely opened and closed.

  The rice cooker body 51 includes an outer case 51a made of a synthetic resin that forms an outer wall, a bottom case 51b made of a synthetic resin that forms a bottom wall, a shoulder member 51c made of a synthetic resin that forms a shoulder, It consists of a synthetic resin-made bottomed cylindrical protective frame 54 constituting the peripheral wall. The inner pot 3 is accommodated in the protective frame 54 so as to be removable.

On the outer peripheral surface side of the protective frame 54, annular main IH coils C ₁ , C ₂ , C ₃ acting as main heating means at the time of rice cooking are between the bottom surface of the protective frame 54 and the bottom surface to the side peripheral surface. The curved portion and the side peripheral surface are disposed corresponding to each other. The main IH coils C ₁ , C ₂ , C ₃ generate an alternating magnetic field (in other words, an electromagnetic wave), generate an induced eddy current in the inner pot 53 by electromagnetic induction of the alternating magnetic field, Heating is performed using the resistance heat of the induced eddy current. The inner pan 53 is made of a material (for example, a magnetic material) that can generate an induced eddy current by the main IH coils C ₁ , C ₂ , and C ₃ . Reference numeral 57 denotes a ferrite core, which acts to block the magnetism generated by the main IH coils C ₁ and C ₂ so as not to affect the underlying equipment. Reference numeral 59 denotes a power supply board.

By the way, in this kind of electric rice cooker, in addition to the heat that the inner pot 53 generates heat and is transmitted inward, there is heat that escapes to the outside of the protective frame 4. In order to effectively use the heat escaping to the outside, in the present embodiment, a heat storage body 60 made of a non-heat generating material (for example, ceramic) having a large specific heat is disposed outside the protective frame 54. ing. In this way, it becomes possible to heat generated in the inner bowl 53 by the IH coil C _1, C _2, C ₃ as a heating means is absorbed heat storage body 60, heat storage thermal can be effectively utilized at the time of thermal insulation. Moreover, the cooling effect at the time of arrange | positioning the part unpreferable with respect to high temperature on the outer side of this thermal storage body 60 can also be anticipated.

A heat retaining heater H ₁ is disposed on the protective frame 54 corresponding to the outside of the side surface of the inner pot 53. Further, a shoulder heater H ₂ for heating the heat radiating plate 65 provided on the lid 52 side is disposed on the inner peripheral edge of the shoulder member 51c.

  On the other hand, the lid 52 is composed of a synthetic resin upper plate 62 constituting the outer surface and a vacuum double structure lower plate 63 constituting the inner surface. The lower plate 63 is configured such that a space between two upper and lower donut-shaped metal plates (for example, stainless steel plates) 63a and 63b is a vacuum space. The lid body 52 is attached to the rice cooker body 51 via an hinge pin 61 formed on one side of the shoulder member 51c so as to be capable of rotating in an arc.

A heat radiating plate 65 made of a heat good conductor (for example, aluminum alloy) for sealing the opening of the inner pot 53 when the lid 52 is closed is attached to the lower surface of the lid 52. The peripheral edge of 65 is pressed against the shoulder heater H ₂ when the lid 52 is closed, and heat from the shoulder heater H ₂ is radiated from the heat radiating plate 65. Reference numeral 64 is a seal packing that seals between the radiator plate 65 and the lid lower plate 63, 66 is an inner lid attached to the lower surface of the radiator plate 65, and 67 is the periphery of the radiator plate 65 and the opening of the inner pot 3. A seal packing 68 for sealing between the two, a lock mechanism 68 for maintaining the closed state of the lid 52, and an operation panel unit 70 provided with various operation keys, a liquid crystal display device and the like.

  As shown in FIG. 8, the operation panel 70 includes a liquid crystal display device 71, a rice cooking key 72a, a reservation key 72b, a cancel key 72c, a heat retention key 72d, a reheating key 72e, a menu key 72f, an hour key 72g, a minute A key 72h, a mode selection key 72i for selecting a mode such as a midnight charge mode, and LEDs 73a, 73b, and 73c are provided. The liquid crystal display device 71 has various menus (“white rice”, “early cooking”, “brown rice”, “rice porridge”, “rice cooked”, “rice cake”, “no-wash rice”, “Miscellaneous cooking”, “pilaf” and “steaming”), time, mode selection status (selection of standard, midnight power mode, etc.), reservation status, reheating display, heat retention time, etc. are displayed.

  Next, the electrical configuration of the electric rice cooker according to the present embodiment will be described based on the electrical circuit diagram shown in FIG. Parts corresponding to those shown in FIGS. 7 and 8 are denoted by the same reference numerals.

The electric power from the commercial AC power supply 80 is supplied to the IH coils C _{1 to} C ₃ through a temperature fuse 81 and a rectifier circuit 85 that are blown by detecting abnormal heating of the inner pot 53. Reference numeral 86 is a smoothing capacitor, 88 is a resonance capacitor, and 89 is a diode.

The IH coil C (specifically, C _{1 to} C ₃ ) is turned on by a command from a microcomputer unit (hereinafter abbreviated as a microcomputer) 82 that also functions as a control means and a setting means via an IGBT drive circuit 82. A control signal from the power transistor 87 which is controlled to be turned off / off is supplied. Reference numeral 90 is a synchronous trigger circuit, and 91 is a PWM circuit.

The microcomputer 82 controls the power transistor 87 and the synchronization trigger circuit 90 according to a predetermined program, thereby controlling the energization to the IH coil C (specifically, C _{1 to} C ₃ ). This energization control is performed based on an output signal from the temperature sensor S. Reference numeral 93 denotes a temperature detection circuit. The set state of the inner pot 53 is detected by a limit switch LS for pot detection, and a detection signal from the limit switch LS is input to the microcomputer 82 via the pot detection circuit 94. It is supposed to be.

9, reference numeral 74 is a shoulder heater drive circuit, 74a is a transistor for controlling the energization of the shoulder heater H _2, transistor 83 is kept heater drive circuit, 83a is to control the energization of the thermal insulation heater H _1, 95 is a buzzer A drive circuit 95a is a buzzer.

  Next, with reference to the flowchart shown in FIG. 10, midnight charge time zone cooking course control of the electric rice cooker according to the present embodiment will be described. In this case, the midnight charge time zone cooking course is selected by the ON operation of the mode selection key 72i.

  In step S1, the cooking time is set to AM 6:00 by the reservation key 72b, and when the start of rice cooking is confirmed in step S2, the process of finishing rice cooking by AM 6:00 in step S3 is executed. Then, when it is confirmed in step S4 that the time has reached AM 6:00, a heat retention start process is executed in step S5. Next, when it is confirmed in step S6 that the time is AM9: 30, a process of raising the temperature to the high temperature holding temperature is executed in step S7. Thereafter, when it is confirmed in step S8 that the time has reached AM 10:00, a heat retention end process is executed in step S9.

  As described above, in the late-night charge time zone cooking course control, after AM 10:00, it becomes higher than the normal charge, so the process from rice cooking to heat insulation is finished by AM 10:00. In addition, the two meals, breakfast (freshly cooked) and lunch (heated), are terminated by raising the temperature before AM10: 00 so that warm rice can be eaten.

  As a result of the above, it is controlled to enter a mode that requires a large amount of power consumption before the end of the low charge period in the low charge plan, and to maintain the state in the normal charge time period and the high charge time period. As a result, it is possible to further reduce the electricity usage fee at home.

  The invention of the present application is not limited to the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

It is a longitudinal cross-sectional view of the electric hot water storage container which is a specific example of the cooking appliance concerning 1st Embodiment of this invention. It is an enlarged top view of the operation panel part in the electric hot water storage container which is a specific example of the cooking appliance concerning 1st Embodiment of this invention. It is a connection diagram of the electrical element in the electric hot water storage container which is a specific example of the cooking utensil according to the first embodiment of the present invention. It is a time chart at the time of using the electric hot water storage container which is a specific example of the cooking appliance concerning 1st Embodiment of this invention in a low charge time zone. It is a flowchart which shows the content of the boiling control in the midnight power mode in the electric hot water storage container which is a specific example of the cooking appliance concerning 1st Embodiment of this invention. It is a flowchart which shows the content of the boiling control at the time of reboiling in the electric hot water storage container which is a specific example of the cooking appliance concerning 1st Embodiment of this invention. It is the side view which made a part of electric cooker which is a specific example of the cooking appliance concerning the 2nd Embodiment of this invention a section. It is an enlarged plan view of the operation panel part in the electric rice cooker which is a specific example of the cooking utensil concerning the 2nd Embodiment of this invention. It is a connection diagram of the electrical element in the electric rice cooker which is a specific example of the cooking appliance concerning 2nd Embodiment of this invention. It is a flowchart which shows the content of the late-night charge time zone cooking course control in the electric rice cooker which is a specific example of the cooking appliance concerning 2nd Embodiment of this invention.

Explanation of symbols

4 is a heating means (electric heater)
3 is an inner container 35 is a midnight power mode switch 36 is a display means (liquid crystal display device)
43 is a microcomputer substrate 71 is a display means (liquid crystal display device)
72b reservation key 82 is microcomputer C _1, C _2, C ₃ the heating means (the IH coil)

Claims (5)

A cooking utensil comprising heating means, control means for controlling heating of the heating means, and display means for displaying a use state and time of the heating means, the control means being provided by an electric power company A cooking utensil configured to perform heating control of the heating means along a time zone suitable for a low price plan. 2. The cooking utensil according to claim 1, wherein the display means is configured to display which time zone the current time is for each rate plan provided by the electric power company. The cooking device according to any one of claims 1 and 2, wherein the display means is configured to display a use state of the heating means. When setting means for setting the finishing time is attached, and the finishing time set by the setting means is out of the minimum charge zone in the low charge plan, the display on the display means is within the minimum charge band. 4. The cooking utensil according to claim 1, wherein the cooking utensil is configured to change a display so as to be finished. The control means may enter a mode that requires a large amount of power consumption before the end of the low charge period in the low charge plan, and control to maintain the state in the normal charge time period and the high charge time period. The cooking utensil according to claim 1, wherein the cooking utensil is configured as follows.

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