JPS60224A - Heating cooker - Google Patents

Abstract

PURPOSE:To increase reliability for the heating cooker by a method wherein the output of a volume is prevented under setting from being impressed by noise and quivering the indication of the setting in the heating cooker of a system in which heating time and heating temperature are set by the volume. CONSTITUTION:The volumes 2, 3, for setting the heating time and heating temperature, and a fluorescent indicating tube 4, reading the output values of the volumes, are provided to indicate at first when the coinciding number of times of the output values of the volumes exceed a constant number of times while the constant number of times is set at different values during operation and non- operation and the number during non-operation is set at larger number. According to this method, the change of indication, which is changed due to the impression of noise on the output of the volume during setting even without turning the volume, may be prevented. Further, the operability of the cooker will never be spoiled even during turning the volume to set actually the heating time and temperature. Furthermore, a chance in which an user thinks that a microcomputer has caused a malfunction may be eliminated and the reliability may be improved.

Description

[Detailed description of the invention] Industrial applications The present invention is heated from the outside by the volume.

This invention relates to a cooking device that heats food by setting the temperature to an arbitrary value.

Conventional configuration and its problems If we show the procedure for setting the time in a heating cooker where the heating time and temperature can be set by turning the volume, first, the corresponding voltage value is generated depending on the rotation position of the volume. Therefore, a microcomputer with a built-in A/D converter reads this voltage value, and a fluorescent display tube displays the heating time and heating temperature corresponding to the voltage value.

Here, in conventional heating cookers, the voltage value read data by the microcomputer is displayed as is without comparison with the previous read data.

In other words, the so-called double check, in which the data is determined to be true and processed only when the read data of the voltage value matches two or more times in a row, or the multiple checks on top of that, were not performed.

Here, a specific example of display will be given. In Fig. 2, if the voltage value depending on the rotational position of the timer volume 2 that sets the heating time is -3.5V, if the ND converter is
Since V ~ -5v is divided into 63, -3.5V is 1 from the table below.
It corresponds to 2 minutes and 50 seconds at level 9, and the set time is 2 minutes and 5 seconds.
0 seconds is displayed on the fluorescent display tube 4 in FIG. Next, if you want to set another heating time, for example 28 minutes, turn the timer volume 2 from the table below to set the output voltage to about 1027V, and 28 minutes oO seconds will be displayed. However, even if you do not turn timer volume 2, if there is noise on timer volume 2 and there is a change of more than a level in 1 A/D conversion, the heating time will be displayed differently from the previous time, so as a result, the display will be due to noise. It will flicker.

This was extremely inconvenient for users of the cooking device. In other words, even when I tried to set the heating time, the display flickered, making it difficult to set the time, and even after I finished setting, the display kept changing randomly, so I was so anxious that I couldn't press the scoot button.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to improve the reliability of the cooking device by preventing noise from being added to the volume output and flickering of the display.

Structure of the Invention In order to achieve the above object, the volume output capture means of the present invention double-checks the data or performs more frequent checks when the volume is not being operated, thereby preventing noise while the volume is not being operated. The display no longer changes randomly.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the user opens the door S, puts the food in, closes the door again, sets the heating time and heating temperature, and then starts cooking.

In FIG. 2, the user first selects one menu from the menu board 6. For example, by pressing key 7 on a microwave oven, microwave cooking is selected. Next, the heating time is set by turning the timer volume 2, and heating cooking is started by pressing the start key 9. The set time is displayed using a fluorescent display tube.

Next, in FIG. 3, a corresponding voltage value vT is generated depending on the rotational position of the timer volume 2, and this vT is input to the microcomputer 8 (7) A/D controller) < - input to AD2, and the A/D Convert.

In FIG. 4, when the timer volume is not being turned, that is, in a non-operating state, the output value V of the timer volume is assumed to have a waveform like the solid line in the graph, assuming that noise is present. Loading v7 is 15 @860
First, the microcomputer determines that it is at level 19 on the first reading. Since the second reading is also at level 19, this is the first time that level 19 is recognized as the true timer volume output value.
Displays 2 minutes and 50 seconds, which corresponds to level 19. The third reading resulted in a level of 20 due to noise, but since the previous reading level had changed to 19,
It's true, the true timer volume output value and (~) are not accepted.

Therefore, 3 minutes and 0 seconds, which corresponds to level 20, is not displayed either.

2 minutes and 6 o seconds remained displayed, and on the 4th reading, the Noinu was not on board, so it was correctly read as level 19. Even in the fifth reading, the level was 1, and since it was 19 level twice in a row, the 19 level was again recognized as the true output value, and 2 minutes and 50 seconds continued to be displayed. As described above, the third data read at level 20 due to noise is ignored, so the display does not flicker due to noise.

Next, when I start turning the timer volume, I drew the vT output waveform as a dotted line when it changes from non-operating to operating. 1.2.In the third read, both are level 19, so this is accepted as the true value and 2 minutes 50 seconds is displayed. Next, since the fourth and fifth readings are level 20, this is accepted as the true value and 3 minutes 00 seconds is displayed. At the sixth reading when the display changes to 3 minutes 00 seconds, the microcomputer determines that the timer volume is being operated. Thereafter, when reading the timer volume output value V, the double check performed during non-operation will not be performed, the read value will be recognized as the true value, and the corresponding time will be displayed.

This is to ensure that operability is not impaired when setting the time using the timer volume. This is because if you are checking the dub/l/duplicate, the data reading interval doubles, so when the timer volume is turned, the speed at which the display changes cannot keep up with the speed at which the timer volume is turned.

When the microcomputer is in operation, if the level read continuously for a certain period of time, for example, two seconds, is a constant value, the operation of the timer volume is considered to have ended, and the microcomputer determines that the microcomputer is not in operation.

Hereinafter, two embodiments of the present invention have been described, but even during operation, it is possible to double check or increase the number of checks as long as it does not impair operability. If you are not operating and the influence of noise cannot be subsided by double checking-1, this is also I-
It would be even better if the ripple check was also taken into consideration.

In short, the number of checks is made different during operation and non-operation, and moreover, the number of checks during non-operation is made greater than during operation. During the switching operation, the volume was rotated to ensure that the display changed smoothly, so to speak, we placed emphasis on operability, and when not in operation, we placed emphasis on noise resistance.

To change it again, at least while the volume is turned on, even if the display flickers a little, it is unlikely to be a malfunction of the microcomputer, but if the display contents change even when the volume is not turned on, it is a malfunction of the microcomputer. Users tend to think that this is the case, so we have tried to prevent this as much as possible.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) In a heating cooker that sets the heating time and heating temperature using a volume control, it is possible to prevent the display from changing without turning the volume due to noise on the volume output during setting.

(Even when you are actually trying to set the heating time and heating humidity by turning the volume, the operability will not be affected.

(3'+ The effect of (1) prevents the user from thinking that the microcomputer is malfunctioning,
- Increased confidence in the turbid water heating cooker.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional heating cooker, FIG. 2 is an enlarged perspective view of the operating section, FIG. 3 is an electric circuit diagram of a control section of a heating cooker according to an embodiment of the present invention, and FIG. The figure is a diagram for explaining reading of the volume output data. 1...Operation unit, 2...Timer volume,
3...Temperature control volume, 4...Fluorescent display tube, 5...Door, 6...-Menu board, 7
...Microwave New Key, 8...
Microcomputer, 9...Cooking nutato key. Figure 1 Figure 2 Figure 4 1 2 3 4. 5 6 7

Claims (1)

[Claims] A heating means for heating an object to be heated, a control unit for controlling the heating means, a volume for setting a heating time and a heating temperature, a means for reading an output value of the volume, and a previous output value of the volume. means for storing the previous output value and the current output value; a counter for counting the number of times the output values match based on the result of this comparison; means for converting the output value of the volume into a corresponding time humidity and displaying it; means for determining whether the heating time or heating temperature is being set; and a counter for counting a certain period of time from when the heating time and heating temperature are no longer being set;
means for determining that the volume is in operation until a certain period of time is counted from when it is being set or is no longer being set, and is not in operation at other times, and when the number of times the output values of the volume match exceeds a certain number of times; This heating cooker is configured to set this fixed number of times of first display to different values during operation and non-operation, and to increase the number during non-operation.