JP3662206B2 - rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice cooker.
[0002]
[Prior art]
This type of rice cooker performs rice cooking control according to a preset program by operating a load component such as a heating means. Also, recent rice cookers have a clock function that displays the current time, and a reservation function that allows rice cooking to be completed at a desired time by inputting the start time or end time of cooking. .
[0003]
[Problems to be solved by the invention]
However, the rice cooker requires a backup battery in order to count the time in a state where the commercial power is cut off, and there is a problem that the control board becomes large. Moreover, since it is necessary to replace | exchange when the electric power of a battery runs out, and the battery replacement can be performed only by the manufacturer, the replacement procedure is very troublesome and the replacement cost must be borne.
[0004]
Accordingly, an object of the present invention is to provide a rice cooker that eliminates the need for a backup battery, reduces the overall size, and does not require troublesome procedures such as battery replacement.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a first rice cooker of the present invention is provided with a rice cooker, a rice cooker body that accommodates the rice cooker, a heating means that induction- heats the rice cooker, and a plurality of switches. In a rice cooker comprising an operation panel, a display panel for displaying time and the like, and a control means for displaying the time on the display panel and controlling the heating means in accordance with the operation of the switch to execute rice cooking control. A receiving unit that receives a standard time signal transmitted by radio waves is provided, and the control unit receives the standard time signal via the receiving unit when connected to a commercial power source, and counts the time based on the received signal. the display on the display panel, and, while performing a time correction by receiving a standard time signal via the reception section at predetermined time intervals during operation of said heating means so as not to perform the time correction with Forms.
[0006]
According to the rice cooker, since a standard time signal transmitted by radio waves when connected to a commercial power source is received and the current time is counted based on the received signal, a backup battery is not required. Therefore, the control board can be reduced in size. In addition, since the standard time signal is received via the receiving unit every predetermined time and time correction is performed, it is possible to prevent an error from occurring in the current time. As a result, when the user cooks using the reserved rice cooking function, the user can surely cook at the desired time. Furthermore, an eddy current is generated during the operation of the heating means for induction heating the rice cooker. As a result, there is a possibility that the information of the standard time signal transmitted by radio waves may change due to noise, or the received signal may be mistaken by the control means. However, in the present invention, since the time correction is not performed during the operation of the heating means, the possibility of displaying a different current time can be eliminated.
[0007]
Moreover, the 2nd rice cooker of this invention is a rice cooker, the rice cooker main body which accommodates this rice cooker, the heating means which induction-heats the said rice cooker, the operation panel which arrange | positioned the some switch, time In a rice cooker comprising a display panel for displaying the time and the control means for displaying the time on the display panel and controlling the heating means in accordance with the operation of the switch to execute the rice cooking control, a standard transmitted by radio waves A receiving unit for receiving a time signal is provided, and the control unit receives a standard time signal via the receiving unit when connected to a commercial power source, counts the time based on the received signal, and displays on the display panel. Displaying and performing a time correction by receiving a standard time signal via the receiver when the heating means is not operating during execution of rice cooking control or heat retention control, while the heating means It is configured not to perform the time correction is in operation.
[0008]
Furthermore, the 3rd rice cooker of this invention is a rice cooker, the rice cooker main body which accommodates this rice cooker, the heating means which induction-heats the said rice cooker, the operation panel which arrange | positioned the several switch, time In a rice cooker comprising a display panel for displaying the time and the control means for displaying the time on the display panel and controlling the heating means in accordance with the operation of the switch to execute the rice cooking control, a standard transmitted by radio waves A receiving unit for receiving a time signal is provided, and the control unit receives a standard time signal via the receiving unit when connected to a commercial power source, counts the time based on the received signal, and displays on the display panel. Display and the operation of the heating means is prohibited when the processing is in a standby state, or when the heating means is not in operation during rice cooking control or heat retention control. It was followed, and executes a time correction by receiving a standard time signal through the receiving unit, and configured to permit the reception of the standard time signal to complete the operation of the heating means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a rice cooker 1 which is an electric cooker according to an embodiment of the present invention. The rice cooker 1 includes a rice cooker 2, a rice cooker body 4 that accommodates the rice cooker 2, and a lid 10 that is rotatably attached to the rice cooker body 4.
[0010]
The rice cooker 2 is coated, bonded, or the like with a ferromagnetic material that is electromagnetically heated by eddy current generated when a high-frequency current is supplied to the induction heating coil 7 on the outer surface of a pot base material made of aluminum or the like having high thermal conductivity. Is given. A water level line 3 corresponding to the number of cups cooked by the user is provided on the inner wall of the rice cooker 2.
[0011]
The rice cooker body 4 includes a protective frame 6 made of a non-conductive material that accommodates the rice cooker 2 inside a body 5 having a bottomed cylindrical shape. Between the body 5 and the protective frame 6, an induction heating coil 7, a rice cooker temperature sensor 8, a receiving unit 9 and a control board 35 on which a microcomputer 36 is mounted are disposed.
[0012]
The induction heating coil 7 generates electromagnetic waves when energized with a high-frequency current, and electromagnetically heats the rice cooking pot 2 via a protective frame.
[0013]
The receiver 9 receives a standard time signal from an organization that transmits a standard time superimposed on a radio wave of a predetermined frequency in Japan, and transmits the information to the microcomputer 36.
[0014]
The lid 10 closes the opening portions of the rice cooker 2 and the rice cooker body 4 so that they can be opened, and a heat radiating plate 11, a lid heater 12 and an inner lid 13 are arranged on the rice cooker 2 side. . The lid body 10 has a known configuration in which a lid temperature sensor 14 is disposed.
[0015]
An operation panel 15 shown in FIG. 2 is disposed in front of the rice cooker body 4. The operation panel 15 includes a plurality of switches 25 to 34 for inputting rice cooking conditions around a liquid crystal display type display panel 16 disposed in the center.
[0016]
The display panel 16 is of a segment display type that is displayed by a driver built in the microcomputer 36, which will be described later, and includes display units 17 to 24 that indicate a setting state or the like by a user operating the switches 25 to 34. . In the display panel 16 of the present embodiment, a numerical display unit 17 that can display a time of 24 hours, a time display unit 18 that represents units such as heat insulation time, and a unit that represents units such as the remaining rice cooking time are displayed at the center. A display unit 19 is provided. In addition, on both sides of these are “rice cooked”, which means the rice cooking menu, etc. A menu display unit 20 for “Okayu”, “Okowa”, “Food rice”, “Brown rice”, and “Cleaning” is provided. Further, two sets of reservation setting display portions 21A and 21B and morning, noon, and evening marks 22a, 22b, and 22c that indicate stored time zones are provided below the numerical value display portion. Furthermore, above the numerical value display portion 17, there are provided a no-wash rice display portion 23 indicating that no-wash rice has been selected and a reheating display portion 24 indicating that re-heating is being performed.
[0017]
As the switches, there are a takeover switch 25, a reservation 1 switch 26, a reservation 2 switch 27, a menu switch 28, a ▽ switch 29, a △ switch 30, a rice cooking switch 31, a heat retention switch 32, a good night heat retention switch 33, and a time correction switch 34. Is provided. The heat retention switch 32 and the night heat retention switch 33 are arranged in one region divided vertically.
[0018]
The microcomputer 36 mounted on the control board 35, according to a program stored according to the operation of each of the switches 25 to 34, a current time setting process, a rice cooking menu setting process including reserved rice cooking, a rice cooking control process, etc. Is to do.
[0019]
Specifically, when the takeover switch 25 is operated, the microcomputer 36 ends the above-described processes and enters a standby state. When the reservation 1 switch 26 is operated, the reservation function 1 is shifted directly to the reservation 1 setting state. Further, when the reservation 2 switch 27 is operated, the state is directly shifted to the reservation 2 setting state of the reservation function. When the menu switch 28 is operated, the rice cooking menu or the reserved rice cooking menu is changed. When the ▽ switch 29 is operated, if the operation is within a predetermined time, the reservation time is decreased by 1 minute. If the operation is continued for a predetermined time or more, the reservation time is increased by 10 minutes during the operation. Decrease with. When the △ switch 30 is operated, if the operation is within a predetermined time, the reservation time is incremented by 1 minute. If the operation is continued for a predetermined time or more, the reservation time is increased by 10 minutes during the operation. Increase with. In addition, when the rice cooking switch 31 is operated, the rice cooking setting including the reserved rice cooking function is confirmed and the rice cooking control process is executed, and the reheating function is executed while the heat retaining function is being executed. Further, when the heat retaining switch 32 is operated, the heat retaining function is executed. In addition, when the good night heat retention switch 33 is operated, the good night heat insulation function having a heat insulation temperature lower than the heat insulation function is executed. When the time correction switch 34 is operated, a standard time signal is received through the receiving unit 9 to correct the current time.
[0020]
The microcomputer 36 of the present embodiment receives a standard time signal via the receiving unit 9 when a power cord is connected to a commercial power source, and counts the current time with a known crystal oscillator based on the received signal. And displayed on the display panel 16. Further, a standard time signal is received via the receiving unit 9 every predetermined time, and the time currently being counted is corrected.
[0021]
Next, the control by the microcomputer 36 will be specifically described.
As shown in FIG. 3, when the user turns on the power by connecting the power cord to the commercial power source, the microcomputer 36 first executes the current time setting process in step S1. Thereby, the microcomputer 36 counts time with the built-in timer based on the received signal.
[0022]
Next, in step S2, the current time and storage menu are displayed on the display panel 16, and the process proceeds to step S3. Here, as in the conventional case, the memory menu is the one selected by the previous user from among “normal”, “soft rice”, “hard”, “sorted rice”, and “brown rice” that can be stored. Is executed.
[0023]
In step S3, it is detected whether any one of the switches 25 to 34 has been operated. If a switch operation is detected, the process proceeds to step S4. If no switch operation is detected, the process proceeds to step S6.
[0024]
In step S4, it is detected whether or not the switch that detected the operation is the time correction switch 34. If it is the time correction switch 34, the process proceeds to step S8 described later. On the other hand, if it is not the time correction switch 34, the process proceeds to step S5, the detection process corresponding to the operated switches 25 to 33 is executed, and the process returns to step S2.
[0025]
In step S6, a time correction determination process is executed. Thereafter, in step S7, it is detected whether it is determined that the current time correction needs to be executed or not. If it is determined that the current time correction needs to be executed, the process proceeds to step S8, where 0 is input to the flag f indicating that the previous current time correction cannot be executed, and the process returns to step S1. On the other hand, if it is determined that the current time correction is not necessary, the process returns to step S2.
[0026]
Next, the current time setting process by the microcomputer 36 will be described.
In this current time setting process, as shown in FIG. 4, the microcomputer 36 first prepares so that the receiving unit 9 can receive the standard time signal in step S <b> 1-1.
[0027]
Next, in step S1-2, it is detected whether or not the current state of the rice cooker 1 is a standby state in which all processes are completed. If it is in the standby state, the process proceeds to step S1-3. If it is not in the standby state, the process proceeds to step S1-7.
[0028]
In step S1-3, after prohibiting the operation of the induction heating coil 7, in step S1-4, reception of a standard time signal is started. In step S1-5, it is detected whether or not the reception of the standard time signal is completed. And when reception is completed, it progresses to step S1-6, operation | movement of the induction heating coil 7 is accept | permitted (prohibition is cancelled | released), and it returns. On the other hand, if the reception has not been completed, the process proceeds to step S1-9.
[0029]
Moreover, in step S1-7, it is detected whether the induction heating coil 7 is operating. That is, it is detected whether the rice cooking pot 2 is induction-heated by the induction heating coil 7 during execution of the rice cooking control or execution of the heat retention control. If the induction heating coil 7 is not operating, the process proceeds to step S1-3. On the other hand, when the induction heating coil 7 is in operation proceeds to step S1-8, the process returns type 1 in the flag f which means that the current time correction was infeasible.
[0030]
If reception has not been completed in step S1-5, it is detected in step S1-9 whether any of the switches 25-34 has been operated. If an operation of any of the switches 25 to 34 is detected, the process proceeds to step S1-10. If no operation of any of the switches 25 to 34 is detected, the process returns to step S1-5.
[0031]
In step S1-10, after stopping the reception of the standard time signal, in step S1-11, the operation of the induction heating coil 7 is allowed and the process proceeds to step S1-8.
[0032]
Next, time correction determination processing by the microcomputer 36 will be described. In this time correction determination process, as shown in FIG. 5, the microcomputer 36 first determines whether or not the current time setting process is completed depending on whether or not 1 is input to f in step S6-1. To detect. When f is 1 (when the current time setting is not completed), the process proceeds to step S6-2. When f is 0 (when the current time setting is completed), the process proceeds to step S6-. Proceed to step 5.
[0033]
In step S6-2, it is detected whether one hour has passed since the previous current time setting process. If one hour has elapsed, the process proceeds to step S6-3 to confirm that the current time correction is to be executed, and the process returns. If one hour has not elapsed, the process proceeds to step S6-4, where it is determined that the current time correction is not necessary, and the process returns.
[0034]
In step S6-5, it is detected whether or not a preset correction time has been reached. If the correction time is reached, the process proceeds to step S6-3. If the correction time is not reached, the process proceeds to step S6-4. Here, in this embodiment, the correction time may be, for example, 0:00 when the user rarely performs rice cooking, or may be a predetermined time every week, and various changes are possible as desired. is there.
[0035]
Thus, in the rice cooker 1 of this embodiment, since the standard time signal sent with a radio wave is received at the time of connection with a commercial power source, and the current time is counted based on the received signal, a backup battery is not required. can do. Therefore, a backup battery circuit is unnecessary, and the control board 35 can be downsized. Moreover, since the manufacturer does not need to set the current time at the time of shipment, the production cost can be greatly reduced.
[0036]
In addition, since the standard time signal is received every predetermined time and the time correction is performed, it is possible to prevent an error from occurring in the current time during counting. As a result, when the user cooks using the reserved rice cooking function, the user can be surely cooked at the desired time. Further, since the time correction is not performed during the operation of the induction heating coil 7, the information of the standard time signal is changed due to noise caused by energization of the high-frequency current during the operation, or the control means misidentifies the received signal. Can be prevented.
[0037]
Furthermore, in this embodiment, since the time correction switch 34 that enables the user to correct the time as desired is provided, the reliability of the displayed time for the user can be improved.
[0038]
【The invention's effect】
As is clear from the above description, the rice cooker of the present invention receives a standard time signal transmitted by radio waves when connected to a commercial power source, and counts the current time based on the received signal. Can be made unnecessary. Therefore, a backup battery circuit is unnecessary, and the control board can be downsized. Moreover, troublesome procedures such as battery replacement are not required. In addition, since the manufacturer does not need to set the current time at the time of shipment, the production cost can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a rice cooker according to an embodiment of the present invention.
FIG. 2 is a front view showing an operation panel of the rice cooker.
FIG. 3 is a flowchart showing control by a microcomputer.
4 is a flowchart showing the current time setting process of FIG. 3;
FIG. 5 is a flowchart showing a time correction determination process of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rice cooker, 2 ... Rice cooker, 4 ... Rice cooker main body, 6 ... Protection frame, 7 ... Induction heating coil, 9 ... Reception part, 10 ... Cover, 15 ... Operation panel, 16 ... Display panel, 17-24 ... Display unit, 25-34 ... Switch, 35 ... Control board, 36 ... Microcomputer.

Claims (3)

A rice cooker, a rice cooker main body that accommodates the rice cooker, a heating means that induction- heats the rice cooker, an operation panel provided with a plurality of switches, a display panel that displays time and the like, and the display panel In the rice cooker provided with a control means for displaying the time and controlling the heating means according to the operation of the switch to execute the rice cooking control,
A receiving unit is provided for receiving a standard time signal sent by radio waves.
The control means receives a standard time signal via the receiving unit when connected to a commercial power source , counts the time based on the received signal, displays the time on the display panel , and A rice cooker characterized in that a standard time signal is received through a receiving unit and time correction is performed, while the time correction is not performed during operation of the heating means . A rice cooker, a rice cooker main body that accommodates the rice cooker, a heating means that induction- heats the rice cooker, an operation panel provided with a plurality of switches, a display panel that displays time and the like, and the display panel In the rice cooker provided with a control means for displaying the time and controlling the heating means according to the operation of the switch to execute the rice cooking control,
A receiving unit is provided for receiving a standard time signal sent by radio waves.
The control means receives a standard time signal via the receiver when connected to a commercial power source , counts the time based on the received signal, displays the time on the display panel , and is executing rice cooking control Alternatively, when the heating means is not in operation during the heat retention control, the time correction is performed by receiving the standard time signal via the receiving unit, while the time correction is not executed during the operation of the heating means. Rice cooker characterized by having done. A rice cooker, a rice cooker main body that accommodates the rice cooker, a heating means that induction- heats the rice cooker, an operation panel provided with a plurality of switches, a display panel that displays time and the like, and the display panel In the rice cooker provided with a control means for displaying the time and controlling the heating means according to the operation of the switch to execute the rice cooking control,
A receiving unit is provided for receiving a standard time signal sent by radio waves.
The control means receives a standard time signal via the receiving unit when connected to a commercial power source , counts the time based on the received signal and displays it on the display panel , and all processing is completed. In the standby state, or when the heating means is not in operation during execution of rice cooking control or thermal insulation control, after prohibiting the operation of the heating means, the standard time via the receiver A rice cooker that receives a signal and performs time correction, and permits the operation of the heating means when reception of the standard time signal is completed .

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