JPS6131372B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a heating device in which the heating sequence of the object to be heated can be easily set and there is less risk of malfunction. In heating devices such as ovens and microwave ovens, sequence heating by repeating a plurality of different heating patterns is often useful. For example, when cooking roast pork in a microwave oven, the first step is to use HiGH power (600W) for 10
Heat for a minute, then in the second step switch to LOW power (200W) and heat for 25 minutes. Finally, in the third step, MEDiuM (400W) is applied and final heating is performed for 50 seconds. The operating procedure for setting such sequence heating using a conventional heating device will be explained. FIG. 1 is a perspective view of the main body of an example of a conventional heating device, and FIG. 2 is a detailed view of the operation panel thereof. The operation panel 2 provided on the front of the main body 1 has an output key 3 for selecting the output, an indicator light 4 for displaying this, and ten numeric keys 5.
A four-digit numerical display section 6 for displaying this, a start key 7 for instructing the start of heating, and a clear key 8 for canceling the set heating pattern are arranged. The key operation procedure for cooking roast pork using such an operation panel is as follows. In other words, the heating sequence cannot be set unless 13 keys are pressed. If you make a mistake in key operation even once during this time, you will have to erase it with the clear key 8 and start over again. Moreover, if the start key 7 is pressed without noticing the erroneous operation, cooking will naturally fail. In order to simplify this troublesome operation, a card with a magnetic tape on which the heating sequence is written is prepared, and when the card is inserted, the heating sequence is read by the magnetic head, and the settings are automated. It has been commercialized. However, even in such a card type, the following drawbacks remain. The amount of data written to the card is large, and there is a high possibility that reading errors will occur during exchange with the head. When a microcomputer (hereinafter abbreviated as microcomputer) is used in the control system, it cannot keep up with the high-speed card insertion. It is difficult to judge whether the heating sequence has been input correctly. It's easy to lose your card. Also, it is troublesome to search because it comes in pieces. To begin with, in the example of the 3-step sequence heating described above, 13 keys are operated, but if the information on each key is expressed as a 4-bit binary code, the amount of data will be 52 bits. In other words, if each key is coded as shown in the table below,

[Table] The roast pork example has 52 bits of data as shown below. “1010−0001−0000−0000−0000−1011−0010
−0101−0000−0000−1100−0101−0000”. In actual examples, a parity check is included to prevent reading errors, so in an example of 3-step sequence heating, it is usually around 80 bits. Since such a large amount of data is picked up one bit at a time using a magnetic head, there is a high possibility that a reading error will occur.
Of course, it is possible that two or more combined errors may occur that escape the parity check. The following will be explained in detail. Although microcontrollers are becoming popular at a remarkable rate, there are limits to the processing speed of software logic using microcontrollers. Even if a relatively high-speed N-MOS type is used, it takes about 3 μs to process one instruction. In the case of P-MOS, it is only about 10 to 20 μs. This is significantly slower than hard logic, which operates on the order of nanoseconds. It is difficult to process such large amounts of data with limited tape length. It is also related to this, but it is difficult to tell if the card data has been entered correctly into the device. There is no reliable method other than checking the display one step at a time by the user himself. This reduces the meaning of the painstaking automatic settings by half. This is a disadvantage because the information medium is a card. This can be said to be a disadvantage of its ease of handling. In view of this background, the present invention aims to realize a heating device in which the heating sequence of the object to be heated can be easily set and there is less risk of malfunction. The configuration of the present invention will be explained below with reference to the drawings. FIG. 3 is a perspective view of the main body showing an embodiment of the present invention. An operation panel 2 is provided on the front of the main body 1,
Similar to the conventional example shown in FIG. 2, three output keys 3, ten numeric keys 5, a start key 7, a clear key 8, a numeric display section 6 (not shown),
It is equipped with an output indicator light 4. Reference numeral 9 denotes a pen-shaped pick-up, which is equipped with a magnetic head or an optical head at its tip, and reads out predetermined data by scanning the bar code 10. In the barcode 10, code names representing heating sequences for each menu are recorded in binary numbers. An 8-bit barcode can encode 256 different menus, and it is easy to encode all the menus listed in Cookbook 11. 2 more servings, 3
Regarding the correction of heating time due to differences in servings and serving sizes, even if you prepare codes for each menu such as a 2-serving sequence and a 3-serving sequence, for example, by increasing 2 bits, you can code 1024 ways. It's easy to get hurt. Now, when the barcode 10 is scanned with the pen-shaped pick-up 9, the data read at this time will be the fourth one.
The circuit shown in FIG. 5 performs the following processing. First, the barcode signal read by the head 12 is amplified by the amplifier 13 and inputted to the input port _IN3 of the microcomputer 14, which is a ±controller. As mentioned above, the amount of data at this time is small, ranging from several bits to more than ten bits, and it is even possible to write the same data (code name) twice in the barcode and double-check the reading. The barcode data read into the microcomputer 14 is immediately stored in the RAM within the microcomputer 14. Then, when the last bit is read,
The barcode data in the RAM is decoded, and one of the heating sequences pre-written in the ROM is selected and written to a predetermined address in the RAM. The address to which this heating sequence is written is used as a control register that performs output control and timer control. In this way, the heating sequence is preset to the controller by transferring data from the ROM in the microcomputer to the RAM, and is accurate and quick. In other words, as long as a bar code of around 10 bits is read accurately, the most important heating sequence is preset to the control section by internal processing of the microcomputer, and there is almost no risk of incorrect settings. Reference numeral 15 denotes an output control unit that changes the average value of power supplied to the heating source 16 (in this example, a magnetron) by changing the time ratio of intermittent on and off times.
The on/off ratio is determined based on the data written to the output control register in RAM. Reference numeral 17 denotes a timer control unit that controls heating time based on data written in a timer control register in the RAM. On the other hand, the microcomputer 14 receives a voice selection address signal according to the decoded heating sequence code.
Outputs VS ₁₅ to VS ₀ . For example, the audio signal “roast pork” is from memory 18 at X “3000”.
If it is stored at address X "3FFF", its start address "3000" (binary code "0011000000000000") is output as the audio selection address signal. FIG. 6 is a timing chart showing the timing relationship of each signal, and the audio selection address signal is output as follows. The CLA signal is then output, clearing the voice address counter 19 and word counter 20. The SET signal is output at the following timing, and the audio selection address signal
VS ₁₅ to VS ₀ are loaded into the voice address counter 19. That is, X "3000" is preset and output as is to the outputs A ₁₅ to _{A 0} of the address counter 19. In other words, memory 18 is
It is addressed to "30000" and outputs the 8-bit audio data _D7 to _D0 stored there. Furthermore, when the CNT signal is output at CLK of the same frequency as that used to sample the audio data,
signal (4KHz in the example; oscillator not shown).
AND is performed and the UP signal is input to the address counter 19 and word counter 20. Therefore, the addresses of the memory 18 are modified one after another, and the audio data is output one after another onto the data buses _D7 to _D0 . This digital audio data is converted to DA by the DA converter 21 and the DA shown in FIG.
Restores audio signals such as out. The waveform of this audio signal is smoothly shaped by the CR circuit at the subsequent stage, and then output as audio by the speaker 22. In other words, the menu name selected here is audibly announced as "roast pork." On the other hand, the word counter 20 is a decimal or hexadecimal counter, and inputs a carry signal CRY to the microcomputer 14 every time it counts 10 or 16 pulses of the UP signal. The microcomputer 14 counts this until the address counter 19 finishes outputting the predetermined sound, that is, in this example, X "3FFF".
Continue outputting the CNT signal until the address is addressed. In other words, word counter 20 is memory 1
Used to detect the data end of 8. The 50/60Hz signal is a pulse synchronized with the power supply frequency and is used for timer counting.
23 is a door switch that responds to opening and closing of the door. Now, with the configuration as explained above, when a heating sequence name is selected, the heating sequence data prepared in advance in the memory will be preset in the output control section and the timer control section, and at the same time, the selected heating sequence name will be voiced. will be notified by. Therefore, there is no need to exchange a large amount of 80-bit heating sequence data with an external medium, and only about 10 bits of data need to be read. Furthermore, whether or not the heating sequence code has been correctly read and decoded can be confirmed by the heating sequence name notified by voice. If the user selects roast pork but is notified of "chicken," the user will immediately know of the malfunction. Just clear it and try again. It is clear that the audio notification is made using the menu name as in this example, but it is also possible to use a code name, for example, "28" for the selection of roast pork.
It is also possible to notify that. This is effective when compressing audio data that requires a large amount of memory, and when also serving as a routine for audio notification of timer time. In the example shown in FIG. 4, the code name and quantity (4 servings) are displayed on the numerical display section 6 along with the voice. The display is performed by dynamic lighting using scan signals _SC4 to _SC0 , and the display data is output as segment signals _Seg7 to _Seg0 . Also, if you use a pen-shaped pick-up to scan the pages of a cookbook like in this example, you can check the heating sequence name by ear while following the barcode of the cookbook with your eyes, making it extremely easy to use. It also eliminates the hassle of losing your card and searching for it. As described above, according to the present invention, there is no exchange of large amounts of data with an external medium, and important heating sequence data is stored in advance in the semiconductor memory, so it can be said that there is no operation caused by erroneous settings. Whether or not the selected heating sequence has been correctly recognized by the control system can be known at the same time as the selection by audio notification of the heating sequence. As described above, the present invention can realize a heating device in which the heating sequence of the object to be heated can be easily set and there is less risk of malfunction.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main body showing a conventional example, Fig. 2 is a detailed view of the operation panel, Fig. 3 is a perspective view of the main body showing an embodiment of the present invention, Figs. 4 and 5 are circuit diagrams, FIG. 6 is a timing chart of various signals. 9...Pen-shaped pick-up, 12...Magnetic or optical head, 14...Microcomputer, 15...Output control relay, 17...Timer control relay, 1
8...Memory, 19...Address counter, 20
...Word counter, 21...DA converter,
22...Speaker.

Claims (1)

[Claims] 1. A heating source that heats an object to be heated, an output control section that controls the power supply to the heating source and varies the output, a timer control section that supplies power to the heating source for a predetermined period of time, the output control section, and the a main control unit that controls the timer control unit; a ROM that stores a heating data group consisting of at least an output and a heating time corresponding to the name of the dish; a memory that stores voice data for vocalizing the name of the dish; A voice synthesis means for synthesizing voice based on the voice data in the memory, a barcode reader for selecting any one from the group of heating data, and a cookbook in which a barcode in which the name of the dish is encoded is printed. When a barcode corresponding to a certain dish name is inputted by the barcode reader, the main control unit reads voice data representing the name of the dish from the memory, and notifies the voice by the voice synthesizing means, Said
A heating device configured to transfer corresponding heating data from within a ROM to a predetermined RAM, control the output control section and the timer control section based on the heating data, and control power supply to the heating source.