JPH074310B2 - Electric cooker - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cooker having a timer for reserving the cooking completion time of a jar rice cooker, an automatic bread maker, an oven, etc. used in general households.

2. Description of the Related Art Conventionally, in the electric cooker of this type, like the example of the jar rice cooker shown in FIG.
And the control part substrate 3 are provided and connected by the lead wire 4.

In the jar rice cooker configured as described above, the operation unit is provided in the main body 1 and is always operated near.
Therefore, the location of the operation unit was limited from the viewpoint of design.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional configuration, first of all, when cooking, it is necessary to operate a switch in the immediate vicinity to set it, so that it is necessary to set it apart from the case of the timer reserved cooking. There was a problem that you couldn't do it from the wrong place. In addition, when cooking with timer reservation, it is not possible to know whether or not the cooker body is receiving even if you make a call from the remote control like a remote control of TV etc. Sometimes I can't even think of it. Furthermore, if an operation portion is to be attached to the lid portion of the jar rice cooker, the lead wire 4 needs to have excellent durability against bending, which is expensive.
Moreover, it was not that the wire would not be permanently broken.

The present invention solves such a problem, and the control circuit of the electric cooker main body and the timer of the operation unit transmit and receive each other's states to confirm each other, thereby connecting with the lead wire. It is an object of the present invention to provide an electric cooker that does not require the like, has good operability, is highly safe, does not fail in cooking, and has a high degree of freedom in design and design. .

Means for Solving the Problems To solve the above problems, an electric cooker according to the present invention includes a heater for heating an object to be cooked such as food, a control circuit for controlling the heater to perform cooking, and a cooking device. A timer that outputs a signal to reserve the completion time and outputs the signal to complete the cooking at the cooking completion time, and a pulse that corresponds to each of the standby for the reservation, the reserved cooking, the completion of the cooking, etc., by the signal of the control circuit / timer. First and second pulse generating means for generating each, and first and second light emitting elements for generating pulsed optical signals by the first and second pulse generating means, and
First and second light receiving elements that receive the light from the first and second light emitting elements, and standby for reservation by the outputs of the first and second light receiving elements,
First and second pulse determination means for determining which pulse is received during reserved cooking, completion of cooking, etc., and outputting to the control circuit and the timer, respectively, and output of the second pulse generation means And a pulse comparison means for stopping the output of the second pulse generation means when the outputs of the two pulse judgment means are compared with each other.

Action According to the above configuration, the control circuit of the electric cooker body and the timer of the operation unit can check the respective states by transmitting and receiving the light with each other by the light emitting element and the light receiving element provided respectively. Therefore, it is possible to transmit / receive a signal by light even if the timer is away from the control circuit without requiring connection with a lead wire, and therefore, it becomes possible to set the timer reservation cooking by operating from a remote place. Moreover, since the signals are transmitted and received to and from each other, the signals can be transmitted and received repeatedly until they are transmitted even if the signal is not transmitted once, and as a result, the cooking is not completed. Furthermore, even if the timer of the operation unit is attached to a place where it moves like a lid of a jar rice cooker, it does not require a highly flexible lead wire because it only needs to make a path for light so that light can be transmitted and received. Furthermore, since the light emitting element is driven only at regular intervals, the timer side power supply can be of low current.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a circuit diagram of a rice cooker according to an embodiment of the present invention, which is composed of microcomputers 5 and 6 and peripheral circuits. Microcomputer shown here
Reference numerals 1 and 2 are so-called one-chip microcomputers composed of a CPU, ROM, RAM and input / output ports. Reference numeral 7 is a temperature-sensitive element, which is attached to the center of the bottom of the pan, and this temperature-sensitive element 7 is connected to the input port of the microcomputer 5 via the A / D converter 8. As a result, the temperature signal from the temperature sensitive element 7 is converted into a binary code and read by the microcomputer 5. A rice cooking switch 9 is input to the microphone computer 5 so as to determine whether or not the rice cooking switch 9 has been pressed. Reference numeral 10 is an AC power supply, and a series circuit of a heater 11 and a relay contact 12 for heating * or water contained in a pot is connected to the AC power supply 10, and a signal from the output port of the microcomputer 5 is transferred to a transistor.
The relay contact 12 is configured to be opened and closed by sending it to the relay coil 14 via 13 and passing a current therethrough. Reference numeral 15 is a phototransistor, which is input to the microcomputer 5 so as to determine whether or not it receives light. Reference numeral 16 denotes a light emitting diode, which is connected to the output port of the microcomputer 5 and emits light when a current is passed. Reference numeral 17 is a DC power supply for operating the above-mentioned circuit, which is composed of a transformer, a diode, a capacitor, a resistor, a transistor, and a Zener diode. Further, 18 is a time setting switch, 19 is an "hour" switch, 20 is a "minute" switch, 21 is a reservation switch, 22 is a start switch, and 23 is a cancel switch, which are microcomputers for determining whether or not they have been pressed. It has been entered in 6. A liquid crystal display device 24 is connected to the microcomputer 6 and displays the time and the like. After that, this liquid crystal display element 24 is LC
Abbreviated as D. A phototransistor 25 is input to the microcomputer 6 so as to determine whether or not it receives light. A light emitting diode 26 is connected to the output port of the microcomputer 6 and emits light when a current is passed.
27 is a battery for operating the microcomputer 6 and peripheral circuits.

Next, the operation of the rice cooker configured as described above will be described. 2 and 3 show the ROM in the microcomputer 6,
FIG. 4 shows a flowchart of the programs stored in the ROMs of the microcomputer 5. The procedure of the program shown in this flowchart will be described.

First, in FIG. 2, in step 1, N = 0 is set in order to initialize that the timer is not reserved. Next, in step 2, in order to determine whether or not timer reservation is in progress, it is determined whether or not N = 1. If not N = 1, the process proceeds to step 3. In step 3, it is determined whether or not the time setting switch 18 has been pressed, and if it has been pressed, step 4
Go to. In step 4, it is judged whether or not the "hour" switch 19 is pressed. If it is pressed, in step 5, the "hour" display of the current time display is counted up and step 6
Go to. If the "hour" switch 19 is not pressed in step 4, the process proceeds to step 6. In step 6, it is determined whether or not the "minute" switch 20 has been pressed. If it has been pressed, in step 7, the "minute" display of the current time display is counted up and the process proceeds to step 8. If the "minute" switch 20 is not pressed in step 6, the process proceeds to step 8. In step 8, it is determined whether or not the time setting switch 18 has been pressed. If not, the process returns to step 4, and if it is pressed, the process proceeds to step 9. At step 9, the present time, reserved time, etc. are displayed, and the process returns to step 2.

If the time setting switch 18 is not pressed in step 3, the process proceeds to step 10. Reservation switch 21 in step 10
It is determined whether or not is pressed. If it is not pressed, the process proceeds to step 9, and if it is pressed, the process proceeds to step 11. In step 11, it is judged whether or not the "hour" switch 19 is pressed. If it is pressed, the "hour" display of the reserved time display is counted up in step 12 and the process proceeds to step 13. If the "hour" switch 19 is not pressed in step 11, the process proceeds to step 13. In step 13, it is determined whether or not the "minute" switch 20 has been pressed, and if it has been pressed, step 14
Then, the "minute" display of the reserved time display is counted up and the process proceeds to step 15. If the "minute" switch 19 is not pressed in step 13, the process proceeds to step 15. In step 15, it is determined whether or not the start switch 22 has been pressed. If not, the process returns to step 11, and if it is pressed, the step
Proceed to 16. In step 16, N = 1 is set in order to set and store that the timer is being reserved, and the process proceeds to step 9.

If N = 1 during timer reservation in step 2, the process proceeds to the subroutine "reserved rice cooking" (shown in FIG. 3), and further proceeds to step 17. In step 17, the cancel switch 23
It is determined whether or not has been pressed. If it has not been pressed, the process proceeds to step 9, and if it has been pressed, in step 18, N = 0 which is not timer reservation is set and the process proceeds to step 9.

Next, the subroutine "reserved rice cooking" will be described with reference to FIG.
In step 19, it is determined whether the difference between the reserved time and the current time is within one hour, and if it is more than one hour, step 20
If the output mode A is 1, it is judged. If it is not 1,
In step 21, the reservation standby mode signal shown in FIG. 5 (a) is output at regular intervals and transmitted to the phototransistor 15 through the light emitting diode 26, and the process proceeds to step 22. In step 20, the output mode A is set to 1 If so, go to step 22.
In step 22, the signal from the light emitting diode 16 is received by the phototransistor 25 to determine whether or not the reservation standby mode signal shown in FIG. 5 (a) is received. If the reservation standby mode signal is not received, in step 23. The display of the liquid crystal display element 24 is blinked to inform that transmission / reception is not possible, and the process proceeds to step 24 to exit the subroutine. If the reservation standby mode signal is received in step 22, step A
= 1 and proceeds to step 24.

When the difference between the reserved time and the current time is within one hour in step 19, it is determined in step 26 whether A = 2, and A
When it is not = 2, the process proceeds to step 27, the reserved rice cooking mode signal shown in FIG. 5 (b) is output at regular intervals, is transmitted to the phototransistor 15 through the light emitting diode 26, and proceeds to step 28. When the output mode A is 2 in step 26, the process proceeds to step 28. In step 28, the phototransistor 25 receives the signal of the light emitting diode 16 to determine whether or not the reserved rice cooking mode signal shown in FIG. 5 (b) is received. If the reserved rice cooking mode signal is received, step 29 So A =
If the reserved rice-cooking mode signal is not received as step 2, step A is set as A = 0 in step 30 and step 31
Go to. In step 31, the signal from the light emitting diode 16 is received by the phototransistor 25 to determine whether or not the rice-cooking completion mode signal shown in FIG. 5 (c) has been received. If the rice-cooking completion mode signal has not been received, go to step 24. If the cooked rice completion mode signal is received, it is set in step 32 that the timer is not reserved, so N = 0 is set and the routine proceeds to step 24.

Further, in FIG. 4, in step 33, it is determined whether or not the rice cooking switch 9 has been pressed, and if so, the process proceeds to step 34. The power supply to the heater 11 is controlled according to the rice cooking sequence stored in step 34, the process proceeds to step 35, it is determined whether the rice cooking is completed, and if the rice cooking is not completed, the process returns to step 34 and the rice cooking is completed. If so, return to step 33.

If the rice cooking switch 9 is not pressed in step 33,
In step 36, the phototransistor 15 receives the signal from the light emitting diode 26 to determine whether the reservation standby mode signal shown in FIG. 5 (a) has been received. If the reservation standby mode signal has been received, Proceed to step 37 and go to FIG. 5 (a).
The reservation standby mode signal shown in is output and the light emitting diode 16
To the phototransistor 25, the heater 11 is deenergized in step 38, and the process proceeds to step 33.

If the reservation standby mode signal is not received in step 36, the process proceeds to step 39, and it is determined whether the signal of the light emitting diode 26 is received by the phototransistor 15 to receive the reservation rice cooking mode signal shown in FIG. 5 (b). If it is determined that the reserved rice cooking mode signal has not been received, the process returns to step 33. If the reserved rice cooking mode signal has been received, the process proceeds to step 40. In step 40, the reserved rice cooking mode signal shown in FIG. 5 (b) is output and transmitted to the phototransistor 25 through the light emitting diode 16, and the energization of the heater 11 is controlled according to the reserved rice cooking sequence stored in step 41. , Step
Proceed to 42. In step 42, it is determined whether or not rice cooking is completed. If rice cooking is not completed, the process returns to step 33, and if rice cooking is completed, the process proceeds to step 43. 5th in step 43
The rice-cooking completion mode signal shown in FIG. 7C is output, transmitted to the phototransistor 25 through the light emitting diode 16, and the process returns to step 33.

Effects of the Invention According to the present invention, as is clear from the description of the above embodiments,
With the control circuit of the electric cooker body and the timer of the operation unit,
With the light emitting element and the light receiving element provided for each, you can check the status of each other by transmitting and receiving light with each other,
It does not require a lead wire connection and can send and receive signals by light even when the timer is remote from the control circuit, so that it can be operated from a remote location to set timer reserved cooking. Further, since the signals are transmitted and received to and from each other, the signals can be transmitted and received repeatedly until they are transmitted even if the signal is not transmitted once, and as a result, the cooking is not completed. Furthermore, even if the timer of the operation unit is attached to a place that moves like a lid of a jar rice cooker or a door of an oven, it is only necessary to create a light path so that light can be transmitted and received, so a highly flexible lead wire is required. In addition, since it emits light only at regular intervals, it does not emit light when the output signal and the returned signal match, so the timer side power supply becomes low current and it is easy to back up with the battery. As a result, it is possible to provide an electric cooker that is safe, has good operability, and is easy to use.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a rice cooker showing an embodiment of the present invention, and FIG.
FIGS. 4 to 5 are flowcharts showing an example of a program for the rice cooker, FIGS. 5 (a), (b), and (c) are output signal waveform diagrams in each mode of the rice cooker, and FIG. 6 is a conventional diagram. It is a fracture | rupture side view of a rice cooker. 5,6 ... Microcomputer, 11 ... Heater, 15,25 ...
… Phototransistors, 16, 26… Light emitting diodes.

Claims (1)

[Claims] 1. A heater for heating an object to be cooked such as food, a control circuit for controlling the heater to perform cooking, a cooking completion time is reserved, and a signal is output to complete the cooking at the cooking completion time. A timer and first and second pulse generating means for generating a pulse corresponding to each of a standby state, a reserved cooking state, a cooking completion state, etc., at regular intervals by a signal from the control circuit / timer, and the first and second pulse generating means. First and second light emitting elements that generate a pulsed optical signal by the second pulse generating means, first and second light receiving elements that receive the light from the first and second light emitting elements, and the first and second light receiving elements. First and second pulse determinations that determine which pulse is received, such as standby for reservation, cooking for reservation, or completion of cooking, based on the output of the first and second light receiving elements, and output to the control circuit and the timer, respectively. Means and said second pulse generation When the output of the two match by comparing the output of the stage and the output of the second pulse judging means, an electric cooker equipped with a pulse comparison means for stopping the output of said second pulse generating means.