JPS6025692B2 - Cooker program display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program display device for a cooking appliance in which multi-step cooking times and their outputs can be programmed.

Conventional cooking appliances such as electric stoves, electric ranges, microwave ovens, and induction heaters use mechanical switch devices and timer devices to adjust the heat or output, so multi-stage output adjustment is not possible. It was difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cooking appliance that allows multi-step programming and that also displays the programmed contents.

Hereinafter, the present invention will be explained in detail using an example in which the present invention is applied to a microwave oven.

Figure 1 is a front view of a microwave oven, and its front shape is:
It consists of a door 1 and a control panel 2 on which control parts such as a timer for setting cooking time are arranged.

FIG. 2 is an enlarged view of the control panel 2 in detail. 3 in the figure is a digital time display for checking cooking time, which is arranged so that hours, minutes, and seconds can be displayed independently. Reference numerals 4, 5, and 6 are three push buttons for setting cooking time arranged directly below the display 3, and are arranged corresponding to the hour, minute, and second display portions of the display 3, respectively.

7 is a step display for displaying program steps, and push metal rods 8 and 7 for selecting high frequency output are provided directly below this display.
Each push button has seven step number display lamps corresponding to numbers 9, 10, and 11.

In addition, the push button 8 is "strong" or strong output, the scale button 9 is "medium" or medium output, the push button 10 is "weak one" or weak output, and the push spade 11 is "defrosting", that is, intermittent weak output suitable for defrosting. This is for selecting each. Further, 12 and 13 are control pushers o for "correction" and "temporary stop," respectively, and 14 is a pushbutton 0 for starting "cooking," and the functions of these push spades will be described later. Details of a control circuit device for a microwave oven having such a layout of the control panel 2 will be explained with reference to FIGS. 3 and 4.

Figure 3 is a block diagram of the control circuit device for a microwave oven.
This is an ultra-low frequency pulse oscillator that independently generates a HZ pulse train, and these output pulses are input to the display register DREG via two-circuit switches SW4, SW5, and SW6 corresponding to each Oshitaku 04, 5, and 6. Ru.

Note that these switches SW4 to SW6 are the same as pushers 04 to 6.
When pressed lightly, only one circuit is closed and the oscillator OS
When the 2HZ pulse from I is pressed deeply, both circuits are closed, and the 2HZ pulse from both oscillators OSI and OS2 is
The pulse of 5Hz and the pulse of 5Hz can be input to the register DREG at the same time. This register D
The contents of REG are digitally displayed by a digital time display 3. In addition, this register DREO is a sexagesimal timekeeping system that prohibits carrying from seconds to minutes and minutes to hours while writing the cooking time using switches SW4 to SW6, so that hours, minutes, and seconds can be written independently. It consists of a number of counters. In other words, when setting the cooking time, hours, minutes,
Each second counter counts input pulses independently, so for minutes and seconds, after "59" it becomes "0" without carrying, and for hours, after "11" it becomes "0".
will return to. On the other hand, when measuring time, the circuit is configured such that subtraction is started from the second count in the lower digits by the IHZ time pulse from the time pulse oscillator OSC, and the digits of the hour are sequentially lowered by the minutes in the higher digits. There is. If the contents of the DETI register DREG are
This is a zero detector that detects the state of 0:00:00) and outputs a time limit signal, and this output signal completes the cooking of that step. Next, press buttons 8, 9, 1 for output selection.
Switches SW8 and SW9 are opened by 0 and 11.
, SWI0, SWII are for inputting a code signal corresponding to the corresponding output and a code signal representing the closing order of each switch as a step number to the buffer register BREQ. Switch SW13 corresponding to "Stop" push button 13
A code signal corresponding to a temporary stop is also input from.

Moreover, this register BREG is connected to the output signal SP from the one-shot multivibrator MM and the switches SW4 to SW4.
The structure is such that a shift for reading out the contents is performed by an open signal of either SW6.
Incidentally, each of the above code signals is determined as follows in this embodiment. Further, the step number for the "end" and "temporary stop" commands is always set to "0". Step number court signal life 0 000 end
"(Town m) 1 t) () 1 German KuH) 2 010 'l1 (M) 3 011 Castle (L) /l 100 Defrost (DF) 5
1 0 1 --6 1
■.

---7 1 11''
"(STOP) Therefore, this buffer register BREO
It is sufficient to have a capacity of 6 bits for temporarily storing one step number and the output command for that step. PREG is the buffer register BRE
This is a program memory for storing the step numbers and their instructions stored in G in step order, and the shift pulse SP from the one-shot multivibrator Hachihada 4.
It is composed of a circular shift register that undergoes quasi-ring shift one step at a time.

Note that this multipipulator MM is triggered by the output of the switch SW14 of the "cooking" pusher 14 and the output of the zero detector DETI. In addition, this program memory P
In this embodiment, the number of output selection steps is set to 7 at maximum, and REG has a capacity of 84 bits in consideration of the possibility that a "pause command" may be inserted between each step.Furthermore, the buffer register BREG Additionally, the program memory PREG can be configured as either an all-bit serial type or a 6-bit parallel digit-serial type, but in the case of an all-bit serial type register, a series-to-parallel converter is required on the input/output side. Of course, this memory P
The output command from RE○ is supplied to an output switching circuit (not shown) within the microwave oven body, where the high frequency output is selected according to the command. TDM is the program memory PR
It has a number of addresses corresponding to the step numbers stored in the memory EG, and for writing and storing the cooking time data input into the display register DREG in the corresponding address in accordance with the step number from the memory PREG. This is a time data memory, and in this embodiment, it is composed of a random access memory (RAM).

DRV is a drive circuit for the step indicator 7 that indicates the step number and its selection output from the program memory PREG, and the details of this circuit will be described later. ANDI converts the timing pulse from the timing pulse oscillator OSC to the harp detector DET from the shift pulse generation from the multipipelator MM.
This is an AND gate for supplying the signal to the display register DREG until the time limit signal I is generated, and FFI is a flip-flop for obtaining the time period for this purpose. Also, D
ET2 is "End" (
000) and "Pause" (111) are detected and the bell B
This is a detector for sounding L. In addition, "correction" pusher 01
The clear signal CL from the second switch SW12 is input to the display register DREO, and is also supplied to the program memory PREG and the time data memory TDM. Next, details of the step indicator 7 and its drive circuit DRV will be explained with reference to FIG.

4-group display LMml with 7 lamps in 1 group for displaying step numbers "1" to "7";
LM circle 2, LMP3, and LMP4 are four transistors TrH, TrM, TrL, and TrDF for group designation,
7 transistors Trl, Tr for specifying step numbers
The circuit is configured such that time-division lighting control is performed by 2,...'rr7, and 4 transistors TrH, Trh4, TrL, TrDF for group designation and 7 transistors Trl to Tr7 for step number designation. Of course,
It is possible to light only the lamps connected in series with the conductive Tofungistor, and in principle this time-division lighting control system can light up one group of 7 lamps as in this embodiment.
The display device with groups requires only 47=11 switching elements such as control transistors, which simplifies the circuit configuration.

Now, in this embodiment, in addition to general time-division lighting control,
Furthermore, one switching transistor T is connected to group designating transistors TrH, TrM, TrL, Tr.
A buffer resistor DBG and other logic circuits are provided to connect to DF and control the bases of all these transistors. That is, the output of the flip-flop FF2 and the 5Hz pulse from the ultra-low frequency pulse oscillator OS2 are supplied to the transistor ThO via the OR gate ORI. In addition, flip-flop FF2 is set as a cyclic shift pulse CP for register DBG, and register DB is set as CP.
G output command “END”, ie (000) detector DET6
The output is interrupted only during the period until the input of the first cyclic shift pulse CP after the delay output from the detector DET3 disappears. In addition, in order to receive all the programs written in the program memory PREG, the register DBG also stores the memory PRE.
It has a capacity on the same order of magnitude as G. However, this register D
BG normally has a circulation path so as to constitute a circulation register, the contents of which are shifted at high speed, the step number and its selected output command are repeatedly read out, and the respective signals are sent to the switching transistors Trl to Tr7 and TrH, T
It is input to the bases of rM, TrL, and TrDF, and its on/off is controlled to display the display lamp in a time-division manner.
When the program step progresses, that is, when the shift pulse SP arrives from the multipipelator skin M, the circulation path is opened by the inverter NV and the amplifier gate AND2, and the circulation of the digit contents of the register DBO is interrupted. Therefore, the digit contents of the register DBG are the same as the digit contents of the memory PREG at the start of the program step, but as the program step progresses, the digit contents are read out and discarded. In the circuit configuration as described above, the operation thereof will next be explained using a specific example.

First, the program to be executed by this circuit device is set as follows.

Defrosting (DF): 1 minute → Strong output (H): 1 minute 50 seconds → Medium output (M): 2 minutes 09 seconds → Low output (L): 5 minutes → Pause (STOP) → Medium output (M) ): 4 tiger low → weak output (L)
:5 minutes.

Now, when writing the above program into this circuit device, first lightly press the "minute" button 5 among the time setting pushers 4 to 6, and the digital time display 3 will display (0:10:00).
This time setting is completed by releasing the push button 5 at the time when .

That is, when push button 5 is pressed lightly, switch SW5
The 2HZ pulse from the oscillator OSI is input to the minute counter of register DREG through register DRE.
The digit content of G is from (0:00:00) to (0:01:00
), (0:02:00) and increases every pulse, (0:
10:00). Since the counted contents of this register DREG are displayed on the display 3 every moment, the contents can be easily checked. Therefore, the display is (0:10:0
0), if the push pin 5 is released, there will be almost no setting errors. Further, the time required to set this 1-minute setting is only 5 seconds even when the push button 5 is pressed lightly. On the other hand, if you are not able to make the appropriate settings due to manipulation of the pusher 05, you can simply press the pusher 5 again for less than 10 minutes and release the pusher 05 when it reaches 1 minute.
If the setting exceeds 10 minutes, press push button 5 deeply and the display will go through one cycle, exceeding (0:00:00), and then displaying (0:00:00).
10:00), the time can be set in the same manner as described above by lightly pressing the push pin 5. In addition, even if push button 5 is pressed deeply and the pulse of 5th day 2 is sent to register DREG, the circuit is configured so that the shift from minute to hour will not occur during time setting, so the display will be (0: 59:00) is followed by (0:00:
00). Therefore, there is no need to press the clear button for this time setting. In addition, the deep pressing mechanisms of presser rods 4 to 6 are not only used when setting errors are made, but also, for example, when
When setting relatively large amounts of hours, minutes, and seconds, such as hours, minutes, and minutes, you can press the button deeply to fast-forward the display until you get close to that time, which can be used to shorten the time required for setting.
Furthermore, the frequencies 2Hz and 5Hz of the pulses of the oscillators OS1 and OS2 used for time setting were determined experimentally in consideration of the followability of human vision, and 2Hz was set by pressing the push button 0 when looking at the display.
The frequency is slower than the time delay until it is released,
2 on the 5th is a frequency that can be used to monitor the movement of numbers.
Now, after setting the 1 and 2 minutes as described above, if you press the "defrost" pusher 11 of the output selection pushers 08 to 11, the output command code signal (100) will be displayed on the register BREG.
and the code signal (001) corresponding to step number "1"
is input.

Also, even if you accidentally operate other pushbuttons 8 to 10,
If pusher 011 is pressed correctly again, the previously input output command code signal will be changed to the correct output command code signal (100
) can be rewritten as The contents of this register BREG are transferred to the memory PREG at the timing when the next time setting push pins 4 to 6 are pressed. Further, the time set in the register DREG is also written at address "1" of the memory TDM. Next, in the same way as last time, program the time and output in the order of strong output 1 minute 5 minutes, medium output 2 minutes 09 sand, and weak output 5 minutes, and write the set time and selection in the memories TDM and PREG respectively. The instruction and its step number are stored.

Now, when the "temporary stop" push pin 13 is pressed after setting the weak output for 5 minutes, the code signal (000) corresponding to the step number "0" and the output command code signal (111) are input to the buffer register BREG. Ru.

After that, the medium output was 49 sand, then the low output was 5 minutes. . When a program is input, the set time is stored in the time data memory TDM at a memory address corresponding to each step number, as shown in FIG. Although time is shown in decimal numbers for ease of understanding in FIG. 3, it goes without saying that these decimal numbers are encoded and stored according to the previously determined code. In addition, the program memory PREG
The same contents as those written in the register DBG in FIG. 4 are stored in the register DBG. Although the contents of this register DBG are shown in decimal numbers and alphabets in order to make it easier to understand in FIG. 4, in reality, these are also encoded and stored. Furthermore, “END” of register DBG
” is (ooo) in the code signal, and this “END-1” instruction simply indicates that no other instruction has been input into the register DBG, and there is no need to input a special function. The set time and the output step number programmed in the manner described above are displayed on the step display 7.

That is, the transistors Trl to Tr7 whose bases are controlled by the step number output of the register DBO select the number lamps "1" to "7" of the step indicator 7, while the transistors whose bases are controlled by the selection output command of the register DBC select the number lamps "1" to "7" of the step indicator 7. When one of TrH, TrM, TrL, and TrDF is selected, the step indicator 7 will display
It will be displayed as shown in the figure. This is a so-called time-division control display system, and requires fewer switching elements for driving lamps. In this type of system, the indicator lamp repeatedly blinks, but if the blinking period is short, the afterimage effect in the eye makes it appear as if it were continuously lit. next,
When executing the program set as above, when the "cooking" push pin 14 is pressed, "DF" of step number "1" in the program memory PREG is read out, and the defrosting command is issued by the output switching circuit of the microwave oven main unit. (not shown), whose output is selected as the decompressed output.

On the other hand, the step number of this program memory PREG is "
(0:10:00) is read out from the time data memory TDM addressed by "1" to the display register DREG, the limited output of the zero detector DETI disappears, and the timer switch (not shown) of the microwave oven body is ) is turned on,
High frequency output for decompression is output. This register DRE
The contents of G are subtracted by the IHZ pulse from the clock pulse oscillator OSC. This situation is displayed on the display 3. On the other hand, the flip-flop FF2 is reset until the output command in the register DBG of the step display 7 changes from "END" to "DF" and the first cyclic shift pulse CP arrives, that is, while the step number "1" is being read. Since the transistor T is turned on and off by the 5th 2nd pulse of the oscillator OS2, only the defrosting step number "1" blinks, and the other steps to be displayed continue to light up. Then, if 10 minutes have passed since the start of cooking, the count content of register DREG will be (0:00:00),
A time-limited signal is generated from the detector DETI, turns off the timer switch in the main body, and turns off the flip-flop FF.
I stops supplying the clock pulse to the register DREG, and further advances the program memory PREG by one step. As the program memory PRE○ progresses by one step, the output command "H" of step number "2" is read out again, and the output switching circuit is switched to the strong output. Also, from address “2” (0:01
:50) is read out to the register DREC, the eye power disappears again, and the timer switch is turned on. Then, high-output heating is performed in the same manner as in the previous defrosting operation. on the other hand,
As the register DBG progresses by one step, the step number "1" is discarded and the step numbers "2" to "
6" is stored. Therefore, the lamp of the step number "1" on the step display 7 is not lit, the lamp of the step number "2" is blinking, and the remaining step numbers "3" to "2" are blinking.
The "6" lamp lights up continuously. In this way, cooking progresses up to the program with step number "4", and when low power heating is performed for 5 minutes in this step, step number "0" and output command "STOP" (111) are output from the program memory PREG. ) is read out.

Therefore, the detector DET2 detects (111) and the bell BL for notifying the end of cooking rings. On the other hand, at this time, time data is not read from the time data memory TDM,
The contents of the display register DREC remain at (0:00:00), and the titer switch also remains off. Further, on the step display 7, the lamp of the step number "5J" and "6" continues to be lit. This is because the contents of step numbers "1" to "4" among the contents of register DBG are read and discarded, and the instruction "STOP" (111) with step number "0" is located at the beginning of register DBG. Detector DE
Next cyclic shift pulse C from (000) detection by T3
Until the arrival of P, the transistor T that drives the display 7
None of rH, TrM, TrL, TrDF, Trl to Tr7 are turned on, and even if the transistor T is the oscillator OS
Even after repeating the on-off cycle with the 2nd pulse on the 5th day of 2, the lamp did not blink. In other words, if there is a "temporary stop" step while the program is in progress, the microwave oven will stop its heating operation at this point, the step indicator 7 will remain lit to indicate the remaining steps, and the time display will remain lit. Vessel 3 is (0
:on:00) is displayed. Therefore, during this temporary pause period, you can modify the food being cooked and press the "Cook" button 1 again.
When 4 is pressed, a shift pulse is SP inputted into the program memory PREG via the multipipelator MM.
The next program step is read and the program proceeds in the same manner as described above.

When the operation of step number "6" is completed, (000) is detected again by the detector DET2 and the bell BL rings. At this point, all program steps are completed and all the lamps on the step indicator 7 are turned off. Therefore, the operator is notified that all programmed cooking steps have been completed. In this way, a series of cooking operations are performed according to the type of heating output and the time period for each step that are initially programmed.

Moreover, the progress of the program is always displayed on the step indicator 7.
During the heating operation, the lamp corresponding to the step number being executed flashes, and you can also tell which type of output is selected by the flashing lamp. On the other hand, since the step completion lamp is off, it is easy to see which step the cooking has been completed. Also,
Since the numbers of executed program steps are turned off in this way, if the program is paused in the middle, only the number lamps of unexecuted steps will continue to be lit, and there will be no blinking lamps. You can immediately tell that it is a temporary stop. By the way, the biggest feature of this circuit device is that once the type of heating output of the programmed step and its set time are stored in the program memory PREG and time data memory TDM, the power to this circuit device can be maintained without turning off. The memory contents are retained for as long as possible.

Therefore, if you want to cook using the same program again, simply press the "Cooking" push pin 14 again and the step display 7 will appear.
The lamps of all the programmed steps are lit again, and the same operation as described above is repeated, allowing the same program as the previous one to be executed. On the other hand, if you want to erase the previous program and write a new one, press the "Modify" button 12, clear the contents of the program memory PRE○ and the time data memory TDM, and then repeat the process described above. A write operation can be performed using the same procedure. As mentioned above, this circuit device is designed to program the microwave cooking time and its output selection in multiple steps using all the child circuits, and compared to the conventional one equipped with a mechanical timer, Even more complex cooking is now possible, and cooking that previously took time and effort can now be done simply by programming.

In addition, time can be set simply by pressing the three buttons for hours, minutes, and seconds, making it easier to set the time than with a numeric keypad. Furthermore, the all-electronic control makes the overall size of the control device relatively compact, and if this circuit device is constructed using a microcomputer, it can be made even more compact. In addition to the layout of the control panel of this embodiment shown in FIG.
For example, a modification as shown in FIG. 5 or, for a horizontal panel, as shown in FIG. 6 may be considered, and furthermore, the arrangement of the lamps of the step indicator may be arranged in a shape as shown in FIG. 7. This modification of the layout is due to the fact that this circuit device is all-electronic, so the mutual positional relationship of the push spade and lamp hour display displayed on the control panel surface is mechanically restricted by the mounting position of the parts. There are fewer controls compared to timers, and this allows for a high degree of freedom in the design of the control panel. Furthermore, the control panel 2 shown in FIG.
In the step display 7 above, lamps of the same color are placed under each row of step numbers "1" to "7" for the push buttons 8 to 11 for output selection, so that each push spade and the lamp correspond to each other. On the other hand, the step display 7 shown in FIG. 7 has push pins 8 to 11 for output selection and step numbers arranged vertically and horizontally, and lamps arranged in a matrix. As explained above, in a cooking appliance equipped with an electronic memory in which the cooking time and output of three or more steps can be programmed, the step display that displays the output of each step has a programmable total The structure has a number of display sections equal to the product of the number of steps and the number of selectable output types arranged in order in the order of steps, so it is easy to use not only during cooking but also when programming in advance.
The output state of each step can be easily grasped at a glance, and the program contents can be extremely easily monitored, which can provide excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a microwave oven for explaining one embodiment of the present invention, Fig. 2 is an enlarged view of its control panel,
Figure 3 is a circuit diagram of the control circuit device, Figure 4 is a detailed diagram of the drive circuit for the step indicator, Figure 5 is a layout diagram of a control panel showing another embodiment, and Figure 6 is a horizontal control panel. FIG. 7 is a layout diagram of main parts of a control panel showing another embodiment of the step display. In the figure, 2 is a control panel, 3 is a digital time display, 4, 5, and 6 are push buttons for hours, minutes, and seconds for setting the time.
7 is a step indicator, 8, 9, 10, 11 are push pins for output selection, 12 is push button 0 for correction, 13 is push button 0 for temporary stop.
, 14 is a push button for starting cooking, DREG is a display register,
TDM is a time data memory, PREO is a program memory, DBG is a buffer register, and DRV is a drive circuit. Figure 1 Figure 2 Figure 5 Figure 7 Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] 1. In a cooker equipped with an electronic memory in which the cooking time of 3 or more steps and its output can be programmed, push buttons 8, 9, 10, 11 for output selection; In order to display the output of all the steps set in the step independently for each step, a number of display sections equal to the product of the total number of programmable steps and the number of selectable output types are arranged in the order of the steps. A program display device for a cooking device, characterized in that it is equipped with a step display device 7.