JP2013076472A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker that can appropriately save power.SOLUTION: The heating cooker includes: a body having a heating chamber to accommodate a heating object; a heating means 31 heating the heating object; a secondary battery 51 supplying power to the heating means 31; an external power supply 50 supplying power to the secondary battery 51 and the heating means 31; a battery switch 55 for connecting or disconnecting between the external power supply 50 and the secondary battery 51; a battery selection switch 56 for connecting or disconnecting between the secondary battery 51 and the heating means 31; and a control part 30 controlling the switches 55, 56 in accordance with clock time.

Description

  Embodiments described herein relate generally to a cooking device including a secondary battery.

  A cooking device such as a microwave oven (hereinafter referred to as a microwave oven) includes heating means using a microwave, a heater, superheated steam, or the like. These heating means operate with electric power supplied from an external power source such as a commercial AC power source, and heat an object to be heated.

  When the voltage of the commercial AC power supply is 100 V, the time for controlling or operating the output of the heating means so that the current consumption is 15 A or less, which is a standard outlet capacity of a general household (power consumption is 1500 W or less) It is necessary to separate and heat.

  Therefore, conventionally, there is known a technique in which a secondary battery is provided in a microwave oven, and power is supplemented by the secondary battery (see, for example, Patent Documents 1 and 2).

JP-A-6-20773 JP 2008-2761 A

  Today, electric products including a microwave oven are required to have a technique for reducing power consumption by using a power source at midnight when the electricity charge is low. In addition, in the event of an emergency where an external power source cannot be used, it is also required to utilize a secondary battery and drive it with the power of the secondary battery or operate other electrical products.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cooking device capable of suitably realizing power saving.

  In order to solve the above-described problems, a heating cooker according to the present invention supplies a main body having a heating chamber that houses an object to be heated, a heating unit that heats the object to be heated, and power to the heating unit. A secondary battery, an external power source for supplying power to the secondary battery and the heating means, a first switch for turning on or off the connection between the external power source and the secondary battery, the secondary battery, and the A second switch for turning on or off the connection with the heating means and a control means for controlling the first and second switches according to time are provided.

  In the cooking device according to the present invention, it is possible to suitably realize power saving.

The front view of the microwave oven which is one Embodiment of the heating cooker which concerns on this invention. The longitudinal cross-sectional view at the time of seeing the microwave oven of FIG. 1 from the front. The functional block diagram of the microwave oven in this embodiment. The circuit diagram which shows especially the electric power supply system of the microwave oven in this embodiment. The table | surface explaining operation | movement of the microwave oven corresponding to the state of a battery switch, a battery selection switch, and an external power switch. The flowchart explaining the charge control process performed with the microwave oven in this embodiment. The flowchart explaining the power supply switching process performed with the microwave oven in this embodiment.

  One embodiment of a heating cooker concerning the present invention is described based on an accompanying drawing.

  Drawing 1 is a front view of microwave oven 1 which is one embodiment of a cooking-by-heating machine concerning the present invention.

  FIG. 2 is a longitudinal sectional view of the microwave oven 1 shown in FIG. 1 when viewed from the front.

  FIG. 3 is a functional block diagram of the microwave oven 1 in the present embodiment.

  FIG. 4 is a circuit diagram specifically showing the power supply system of the microwave oven 1 in the present embodiment.

  As shown in FIG. 1, the microwave oven 1 has a main body 10 and a door 11.

  The main body 10 includes a cabinet 10a that forms the top surface, side surfaces, and back surface of the main body 10, and a bottom plate 10b that forms the bottom surface.

  The door 11 is attached to the front surface of the main body 10. The door 11 allows the opening of the heating chamber 14 to be opened and closed by a hinge provided at the lower front portion of the main body 10.

  For example, an operation unit 20 and a display unit 21 are provided below the door 11.

  The operation unit 20 (operation means) includes a dial / decision key 25, a start key 26, and a cancel key 27.

  The dial / decision key 25 accepts selection of manual or automatic operation, heating conditions, automatic cooking menu, and the like by rotating the dial. The dial / decision key 25 accepts a selection decision made by a rotation operation by a pressing operation.

  The start key 26 receives an operation start instruction based on the determined cooking menu, heating mode, and heating condition. The cancel key 27 receives an instruction to cancel the selection or determination that has already been received or to stop the started heating operation. For example, the cancel key 27 accepts an instruction to reset the content that has already been determined by pressing the cooking menu or heating condition.

  The display unit 21 displays the selection and setting of the cooking menu performed by the user via the operation unit 20 and the operating state of the microwave oven 1. In addition, the display unit 21 notifies the user of the state of the secondary battery 51 by displaying that the secondary battery 51 described later is being charged and displaying the usable electric energy of the secondary battery 51. The microwave oven 1 can perform power saving, peak cut, and peak shift awareness to the user based on the notification.

  As shown in FIG. 2, the inner box 12 is accommodated in the cabinet 10a. The inner box 12 forms a heating chamber 14 that accommodates an object to be heated. The inner box 12 has an opening on the front surface of the microwave oven 1 through which a heated object is taken in and out of the heating chamber 14.

  The flat dish 15 (fixed dish) is disposed on the bottom surface of the heating chamber 14, and an object to be heated is disposed on the flat dish 15.

  As shown in FIG. 2, the main body 10 has heating means such as a magnetron 31, a heater 32, and a steam generating heater 33 (hereinafter referred to as “heating” when the magnetron 31, the heater 32, and the steam generating heater 33 are not distinguished from each other). Means 31-33 ") are provided at predetermined positions. The microwave oven 1 can perform cooking such as range cooking, oven cooking, and steam cooking of an object to be heated accommodated in the heating chamber 14 by the heating means 31 to 33.

  The magnetron 31 generates a microwave. The output of the microwave is controlled according to the power supplied from the inverter 40. The inverter 40 (see FIG. 3) changes the output of the magnetron 31 to a plurality of values.

  The microwave radiated from the magnetron 31 passes through the waveguide 35 connected to the magnetron 31 and flows into the lower surface of the rotating antenna 36. The microwave is stirred by the rotating antenna 36, then passes through the flat dish 15 and is radiated into the heating chamber 14.

  The rotating antenna 36 propagates the microwave to the heating chamber 14 by rotating or stopping.

  The antenna drive unit 41 is a motor connected to the rotary antenna 36 via a shaft 41a. The antenna drive unit 41 rotates and stops the rotating antenna 36 based on a control signal from the control unit 30 (see FIG. 3). The antenna drive unit 41 can easily change the rotation speed by using a stepping motor.

  The antenna position detection unit 42 is, for example, a micro switch or a photo interrupter, and detects the rotation angle and position of the rotating antenna 36. The antenna position detection unit 42 supplies the detection result to the control unit 30.

  The heater 32 is provided, for example, on the ceiling side (upper side) of the heating chamber 14 and performs oven cooking with the radiated heat. The steam generating heater 33 heats the water supplied from the tank and generates steam. The generated steam is supplied to the heating chamber 14 from, for example, a steam supply port provided on the side surface of the inner box 12.

  The infrared sensor 45 is provided above the right side surface of the heating chamber 14 and detects the temperature by detecting infrared rays in the heating chamber 14 (on the flat plate 15). The infrared sensor 45 is a monocular or multi-eye infrared sensor.

  The control unit 30 illustrated in FIG. 3 electrically controls each unit of the microwave oven 1. The control unit 30 detects the remaining battery level of the secondary battery 51 described later, and controls switching of the battery switch 55, the battery selection switch 56, and the external power switch 57.

  The control unit 30 includes a storage unit 30a that stores a time for reference when the switches 55 to 57 are controlled or the secondary battery 51 is started to be charged. Further, the control unit 30 has a timer 30b that measures the current time. The control part 30 has the memory | storage part 30a and the timer 30b, and controls each switch 55-57 according to time.

The buzzer notification unit 46 outputs a buzzer sound for notifying the user at a predetermined timing based on an instruction from the control unit 30.

  As illustrated in FIG. 4, the microwave oven 1 includes an external power supply 50 and a secondary battery 51 as a power supply source. The external power source 50 is a power source such as a commercial AC power source, a generator, or a battery. In the present embodiment, the case where the external power source 50 is a commercial AC power source will be described as an example. The external power supply 50 is connected to the inverter 40 (heating means 31 to 33) and the external power supply terminal 52 to supply power.

  The secondary battery 51 stores electric power supplied from the external power supply 50. The secondary battery 51 supplies power to the inverter 40 and the external power supply terminal 52. The external power supply terminal 52 supplies the power supplied from the external power supply 50 and the secondary battery 51 to other electrical devices connected to the external power supply terminal 52. As other electric devices, for example, cooking small appliances such as an electric pot used in the vicinity of the microwave oven 1 can be considered.

  In FIG. 4, illustration of the heater 32 and the steam generating heater 33 as the connection destination of the external power supply 50 is omitted, but the heater 32 and steam generating power are supplied by the power supplied from the external power supply 50 and the secondary battery 51. The heater 33 operates.

  The microwave oven 1 includes a battery switch 55, a battery selection switch 56, and an external power switch 57. The battery switch 55 (first switch) turns on or off the connection between the external power supply 50 and the secondary battery 51. The battery selection switch 56 switches the connection destination of the secondary battery 51 between the external power supply terminal 52 and the inverter 40. That is, the battery selection switch 56 (second switch) turns on or off the connection between the secondary battery 51 and the inverter 40. The battery selection switch 56 (third switch) turns on or off the connection between the secondary battery 51 and the external power supply terminal 52. The external power switch 57 (fourth switch) turns on or off the connection between the external power supply 50 and the external power supply terminal 52.

  FIG. 5 is a table for explaining the operation of the microwave oven 1 corresponding to the states of the battery switch 55, the battery selection switch 56, and the external power switch 57. The case where the external power switch 57 can be in either the ON state or the OFF state is indicated by hatching in FIG.

  When the battery switch 55 is ON and the battery selection switch 56 is OFF (pattern 1), the external power supply 50 supplies power to the secondary battery 51, and the secondary battery 51 is charged. When the battery switch 55 is OFF and the battery selection switch 56 is OFF (Pattern 2), the external power supply 50 supplies power to the inverter 40 (heating means), and cooking by the magnetron 31 is performed.

  When the battery switch 55 is OFF and the battery selection switch 56 is connected to the inverter 40 (Pattern 3), the external power supply 50 and the secondary battery 51 supply power to the inverter 40, and cooking by the magnetron 31 is performed. .

  When the battery switch 55 is OFF and the battery selection switch 56 is connected to the external power supply terminal 52 (pattern 4), the secondary battery 51 supplies power to the external power supply terminal 52. When the battery switch 55 is OFF, the battery selection switch 56 is OFF, and the external power switch 57 is ON (pattern 5), the external power supply 50 supplies power to the external power supply terminal 52.

  In the patterns 4 and 5, when power is simultaneously supplied to the heating means 31 to 33 and the external power supply terminal 52, the power consumption of the heating means 31 to 33 and the power consumption of the external power supply terminal 52 are set to a current transformer or the like. The power may be supplied from the secondary battery 51 in the direction where the amount of power used is larger. By supplementing the power of the external power supply 50 with the secondary battery 51, the power consumption of the external power supply 50 can be suppressed.

  In addition, the connection state of each of the switches 55 to 57 (the operation state of the microwave oven 1) is appropriately displayed on the display unit 21 and notified to the user, so that the user can be conscious of power saving.

  Next, the operation of the microwave oven 1 in this embodiment will be described using a flowchart. First, the charging control process executed by the control unit 30 to determine the timing for charging the secondary battery 51 will be described.

  FIG. 6 is a flowchart illustrating the charging control process executed by the microwave oven 1 in the present embodiment.

  In step S1, the control unit 30 determines whether or not the current time is midnight power time. “Midnight power time” refers to a time when a charge is reduced when using electricity from midnight to morning when power consumption is low. When it is determined that the current time is not the midnight power time (NO in step S1), the control unit 30 waits until the midnight power time arrives.

  On the other hand, when it is determined that the current time is the midnight power time (YES in step S1), the control unit 30 detects the charging state of the secondary battery 51 in step S2, and determines the storage capacity of the secondary battery 51. It is determined whether the battery is almost 100% charged (charge state is MAX) or not. When it is determined that the charging state of the secondary battery 51 is MAX (YES in step S2), the control unit 30 ends the charging control process because charging of the secondary battery 51 is unnecessary.

  On the other hand, when the control unit 30 determines that the state of charge of the secondary battery 51 is not MAX (NO in step S2), in step S3, the microwave oven 1 performs range cooking and oven based on the power supply from the external power source 50. It is determined whether cooking or steam cooking is in progress. When it is determined that the microwave oven 1 is cooking (YES in Step S3), the control unit 30 waits until cooking is completed.

  On the other hand, when it is determined that the microwave oven 1 is not cooking (NO in step S3), the control unit 30 turns on the battery switch 55 and supplies power from the external power source 50 to the secondary battery 51 in step S4. Thus, charging of the secondary battery 51 is started. At this time, the control unit 30 displays on the display unit 21 that the secondary battery 51 is being charged.

  In step S5, the control unit 30 detects the state of charge of the secondary battery 51, and determines whether or not the state of charge of the secondary battery 51 has become MAX. When control unit 30 determines that the charging state of secondary battery 51 is not MAX (NO in step S5), charging of secondary battery 51 is continued until the charging state becomes MAX.

  On the other hand, when it is determined that the charging state of the secondary battery 51 is MAX (YES in step S5), the control unit 30 ends the charging of the secondary battery 51 in step S6.

  The microwave oven 1 can automatically charge the secondary battery 51 using late-night power at which the power rate is low by executing such a charge control process. Thereby, the microwave oven 1 can reduce the electricity bill required for charging the secondary battery 51. In addition, when the external power source is a commercial AC power source, the microwave oven 1 can realize a “peak shift” in which the time for using electricity is moved in a time zone where power demand is relatively low, such as at night.

  In the charge control process of FIG. 6, whether or not the midnight power time has come is used as one of the charge start conditions, but the arrival of another time may be set as the start condition. For example, the control unit 30 checks the charging state (remaining battery level) of the secondary battery 51 in the morning. When the state of charge is not MAX, the control unit 30 can supply power using the secondary battery 51 charged in the morning from the afternoon to the evening when the power demand peaks. Thereby, the microwave oven 1 can implement | achieve the "peak cut" which suppresses the power consumption of the external power supply 50 which is a commercial alternating current power supply in the time slot | zone when a power demand can become a peak.

  Above, description of the charge control process performed by the microwave oven 1 in this embodiment is complete | finished.

  Next, the power supply switching process for switching the power supply used by the microwave oven 1 in the present embodiment will be described.

  The microwave oven 1 has two heating modes. The first heating mode is a normal heating mode in which cooking is performed using the external power source 50 or the secondary battery 51 and using the same or lower power as that when only the external power source 50 is used. The second heating mode is a rapid heating mode that uses both the external power supply 50 and the secondary battery 51 and performs cooking using a larger electric power than when only the external power supply 50 is used. The power source switching process described below is a process executed when the microwave oven 1 receives an instruction to heat an object to be heated using the normal heating mode which is the first heating mode via the operation unit 20. It is.

  FIG. 7 is a flowchart for explaining a power supply switching process executed by the microwave oven 1 in the present embodiment.

  In step S11, the control unit 30 determines whether or not an instruction for cooking in the normal heating mode has been received. When it is determined that the instruction for cooking by heating in the normal heating mode is not accepted (NO in step S11), the control unit 30 waits until the instruction is accepted.

  On the other hand, when it determines with the control part 30 having received the instruction | indication of the heating cooking by normal heating mode (YES of step S11), it determines whether the present time is midnight electric power time in step S12. When the control unit 30 determines that the current time is the midnight power time (YES in step S12), the power from the external power source 50 is supplied to the heating units 31 to 33 that are operated based on a user instruction in step S13. Supply. When the current time is the midnight power time, since the power charge is low as described above, the microwave oven 1 selects the power supply by the external power source 50.

  On the other hand, when it is determined that the current time is not the midnight power time (NO in step S12), the control unit 30 detects the remaining amount of the secondary battery 51 in step S14, and the detected remaining amount is equal to or greater than a predetermined value. It is determined whether or not. The predetermined value used for the determination is, for example, the value of the remaining battery level that can supplement the power required for the operation of the heating means 31 to 33 based on the cooking menu instructed by the user.

  When the control unit 30 determines that the remaining amount is equal to or greater than the predetermined value (YES in step S14), in step S15, the power from the secondary battery 51 is supplied to the heating units 31 to 33 that are operated based on a user instruction. Supply. By supplying power from the secondary battery 51, the microwave oven 1 suppresses the power consumption of the external power source 50 such as a commercial AC power source during a time period in which the power demand other than the midnight power time can be peaked. Can be realized.

  On the other hand, when it is determined that the remaining amount is smaller than the predetermined value (NO in step S14), the control unit 30 determines that the heating units 31 to 33 cannot be operated only by the secondary battery 51. In step S <b> 16, the control unit 30 supplies power from the external power supply 50 and the secondary battery 51 to the heating units 31 to 33 that are operated based on a user instruction.

  At this time, the control unit 30 sets the power supply ratio between the external power supply 50 and the secondary battery 51 in consideration of the peak of power demand. Specifically, the time when the power demand reaches a peak is stored in detail in the storage unit 30a of the control unit 30. The control unit 30 controls the power supply ratio between the external power supply 50 and the secondary battery 51 according to the time stored in the storage unit 30a. For example, the control unit 30 increases the power supply ratio of the secondary battery 51 at the time when the peak arrives. The power supply ratio according to the time stored in the storage unit 30a may be changeable by the user or automatically.

  Moreover, the control part 30 controls the power supply ratio of the external power supply 50 and the secondary battery 51 so as to be larger than the amount of power when only the external power supply 50 is used, and performs cooking using large power. , Cooking time can be shortened.

  Above, description of the power supply switching process performed by the microwave oven 1 in this embodiment is complete | finished.

  Note that the power supply switching process of FIG. 7 can be applied even when another electrical device is connected to the external power supply terminal 52. Specifically, the control unit 30 determines whether it is midnight power time (time determination step S12 in FIG. 7) and whether the remaining amount of the secondary battery is equal to or greater than a predetermined value (remaining amount determination step S14). Accordingly, the power supply source for the external power supply terminal 52 is switched. Thereby, the microwave oven 1 can have the same effect as described above even when the external power supply terminal 52 is used.

  Note that in the power supply switching process when another electrical device is connected to the external power supply terminal 52, the instruction acceptance determination step S11 of FIG. 7 determines whether or not another electrical device is connected to the external power supply terminal 52. Since only the process is changed, the description using the flowchart is omitted.

  According to the microwave oven 1 in the present embodiment described above, the external power source 50 used by the microwave oven 1 can be suitably saved by controlling the power supply from the external power source 50 according to the time.

  In addition, since the power charged in the secondary battery 51 can be used for other electrical devices, the secondary battery 51 can be utilized even in an emergency or when the external power supply 50 cannot be used. .

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Microwave oven 10 Main body 14 Heating chamber 20 Operation part 21 Display part 30 Control part 30a Storage part 30b Timer 31 Magnetron 32 Heater 33 Steam generation heater 50 External power supply 51 Secondary battery 52 External power supply terminal 55 Battery switch 56 Battery selection switch 57 External power switch

Claims (9)

A main body having a heating chamber for accommodating an object to be heated;
Heating means for heating the object to be heated;
A secondary battery for supplying power to the heating means;
An external power supply for supplying power to the secondary battery and the heating means;
A first switch for turning on or off the connection between the external power source and the secondary battery;
A second switch for turning on or off the connection between the secondary battery and the heating means;
A heating cooker comprising control means for controlling the first and second switches according to time.   2. The control unit according to claim 1, wherein when the predetermined time arrives, the control unit turns on the first switch to supply power from the external power source to the secondary battery to start charging the secondary battery. Cooking cooker. An operation means for receiving an instruction to start heating by the heating means;
When the operation means accepts an instruction, the control means turns on the second switch to supply electric power to the heating means from the external power source and the secondary battery, and the control means according to a predetermined time The heating cooker according to claim 1 or 2, wherein a supply ratio between the external power source and the secondary battery power for the heating means is controlled. An operation means for receiving an instruction to start heating by the heating means;
The control means detects the remaining battery level of the secondary battery when the operation means receives an instruction, and turns on the second switch when the remaining battery level is equal to or greater than a predetermined value to turn on the secondary switch. The cooking device according to claim 1 or 2, wherein electric power is supplied from a battery to the heating means.   The cooking device according to any one of claims 1 to 4, further comprising an external power supply terminal that supplies power supplied from at least one of the external power supply and the secondary battery to another electrical device. A third switch for turning on or off the connection between the secondary battery and the external power supply terminal;
A fourth switch for turning on or off the connection between the external power supply and the external power supply terminal;
When the other electric device is connected to the external power supply terminal, the control means turns on the third and fourth switches to supply power from the external power supply and the secondary battery to the external power supply terminal. The cooking device according to claim 5, wherein the heating cooker controls the power supply ratio to the external power supply terminal from the external power supply and the secondary battery according to a predetermined time.   When the control means turns on the fourth switch and power is supplied from the external power source to the heating means and the external power supply terminal, the power consumption is large among the heating means and the external power supply terminal. The cooking device according to claim 6, wherein the second or the third switch is turned on so that electric power is supplied from the secondary battery.   The cooking device according to any one of claims 1 to 7, further comprising display means for displaying a remaining battery level of the secondary battery.   The cooking device according to any one of claims 1 to 8, further comprising display means for displaying that the secondary battery is being charged.

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