JPS6131371B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a high frequency heating device. The operation panel of a recent high-frequency heating apparatus that uses an electronic control circuit to control the heating state and display contents is as shown in FIG. 1, for example. First, when a desired function switch is selected from the function switch group 7-1 and pressed, a message to that effect is displayed on the display device 6. Next, the knob 4-1 of the analog variable variable device 4 is moved to set a numerical value such as heating time, but the setting method using the analog variable variable device 4 is different from other methods such as 0.
Compared to the method using numerical switches of 9 to 9, this method requires only the knob 4-1 and has the advantage of being easy to operate, but has the disadvantage that there is a limit to the number of numerical values that can be set. In other words, knob 4-1
According to experiments, the limit on the number of values that can be set per unit movement distance is approximately 1/2 to 2/3 (ke/mm).
If it becomes more detailed than this, it becomes difficult to set it. However, this type of high-frequency heating device has various functions, and the length of heating time and the time interval required for setting vary depending on the function used. A list of these is shown in Table 1.

[Table] In order to set the heating times that can be used for all of these heating functions, it is necessary to be able to set all the times shown in Table 2, which are arranged in order of magnitude of the times required in Table 1.

[Table] From Table 2, the number of heating times required for setting is section a.
There are 103 species in ~c. However, since the moving distance of the knob 4-1 of the normal analog variable variable device 4 cannot be set very long, the number of heating times that can be provided is about 30 to 40 for the above-mentioned reasons. Therefore, in order to satisfy this condition, for example, the number of heating times required at the time of setting is divided into three intervals a to c as shown in Table 2, and one of them is selected. must be taken.
In this case, for example, sections a, b, c shown in Table 2
corresponding to section selection switches a, b, c, respectively.
A section selection switch group 7-4 including section selection switches 7-4 is provided, and an appropriate section, for example b, is selected from among the switches. Therefore, the knob 4- of the analog amount variable device 4
1 and set a necessary value, for example, 16 minutes, and this value is displayed on the display device 6. Next, press the heating start switch 7-3.
Heating is performed for 16 minutes using the settings as described above, that is, the selected function. However, this method requires selecting a function and then selecting a numerical interval such as heating time, which not only takes time and effort to find an appropriate interval selection switch, but also increases the number of operation switches by the number of interval selection switches. However, the disadvantage is that the operation panel is complicated, making operations complicated and prone to erroneous operations. Furthermore, regarding the method of displaying the heating time, conventional high frequency heating apparatuses use a method as seen in Japanese Patent Application Laid-Open No. 101751/1983. That is, when displaying a heating time of 15 minutes and 30 seconds, one of the dots used to display the time is used to display something like "15.30". However, with this method, the heating time is, for example, 9 minutes.
When it comes to seconds, the display becomes "9.30", and the time display during standby mode, for example, the display of 9:30 "9:
There was a drawback that it was difficult to distinguish between 30" and 30".Furthermore, we will explain the drawbacks that occur when displaying the heating times listed in Table 1. The maximum heating time that must be set is short at 10 minutes, but settings must be made in seconds.This is because the heating time is extremely short when heating a small amount of food, such as a cup of rice or a bottle of milk. Yes, this will be referred to as short-time display from now on. Also, in the same table, when heating with functions No. 2, 3, and 5, the maximum heating time that must be set is 60 to 150 minutes, which is long. However, in this case, the time interval to be set is 2 to 5 minutes, so there is no need to set it in seconds.Therefore, to avoid complexity and to simplify the display device, it is displayed in minutes. This will be referred to as the long-time display from now on. In conventional high-frequency heating equipment, when the heating time of 120 minutes is displayed in the long-time display, it is displayed as "120".However, this method However, there were drawbacks such as difficulty in distinguishing the short-time display of 1 minute and 20 seconds from "1.20" and the possibility of setting the heating time incorrectly and damaging the food.The present invention was made in consideration of the above circumstances. The purpose of this is to reduce the number of operation switches when setting heating times for various heating functions to simplify operations, and to prevent incorrect heating time settings that tend to occur due to simplification. As shown in Table 1, the present invention requires a surprisingly small number of numerical values such as heating time for a single heating function. Focusing on this, we have made it possible to select a function by simply pressing a predetermined function switch, and simultaneously select a group of numerical values and units such as heating time that are suitable for that function. An embodiment will be explained with reference to the drawings. Fig. 2 is a block diagram of the control circuit of the high frequency heating device of the present invention, and Fig. 3 is a block diagram of the control circuit of the high frequency heating device of the present invention.
FIG. 4 is an example of the operation panel section, and FIG. 5 is an example of the operation of the display device. In the figure, 1 is a microcomputer (hereinafter referred to as a microcomputer), which is connected to a CPU (central information processing unit) via an I/O (input, output section) 1-1.
1-2 are coupled together, and a ROM (read-only memory device) 1-3 and a RAM (memory device that can read and write) 1-4 are coupled to this. In addition, the terminal of the microcomputer 1 is connected to a temperature detection element 3 whose analog value changes depending on the temperature, and a numerical value such as heating time, etc. An analog variable variable device 4 having a knob 4-1 for setting is connected. Furthermore, a time pulse generation circuit 5 necessary for the microcomputer 1 to measure heating time is connected to the terminal of the microcomputer 1, and a display device 6 is also connected via a buffer. This display device 6 has a segment group 6-1 for displaying the first digit from 0 to 9, and on the left thereof, the second and third digits, respectively.
Segment group 6-2 for displaying digit numbers
and 6-3 are arranged, and a segment group for displaying the number 1 may be arranged in the fourth digit, although it is omitted in the drawing.
Further, on the right side of the segment group 6-1, segments 6-4 and 6-5 are arranged to display characters representing minutes and seconds, respectively, and between the segment groups 6-2 and 6-3, the minutes are displayed. The configuration is such that a segment 6-6 for displaying a meaningful character and a segment for indicating time, which is omitted in the figure, may be arranged. Taking a fluorescent display tube as an example, the segments 6-4 to 6-6 each have a phosphor printed in the shape of letters on one anode electrode, and the anode electrode is heated. When electrons arrive, only the phosphor emits light to display characters. Further, an operation switch group 7 consisting of a function switch group 7-1 for selecting a necessary heating function, a cancel switch 7-2, a heating start switch 7-3, etc. is connected to the terminals of the microcomputer 1, and a control switch group 7 for selecting a necessary heating function is also connected. A high-frequency heat source 8 and other attached heat source groups 9 such as heaters are connected through the cables. On the other hand, in the ROM section 1-3 of the microcomputer 1, when a predetermined heating function is selected from the function switch group 7-1, a numerical value group such as heating time suitable for this function is stored, for example, No. 1 to No. 1 in Table 1. It has the function of selecting the numerical value group listed in the same table corresponding to each of the heating functions in .5, and the function of performing predetermined heating with this heating function. Also, the ROM section 1 of the microcomputer 1
3 has the function of displaying a unit suitable for the selected numerical value on the display device 6 at the same time when a predetermined heating function is selected and the switch 7-1 is pressed. That is, for example, in Table 1
Figure 5 1 for the numerical group including No. 1 and 4 seconds.
The numbers are displayed as shown in FIG. 5, and the numbers 2, 3, and 5 are displayed as shown in FIG. Furthermore, the ROM section 1-3 of the microcomputer 1 has information that when a predetermined heating function is selected and the knob 4-1 of the analog amount variable device 4 is moved to increase the analog amount of the device 4, Converting this value into a digital value via the analog-to-digital conversion auxiliary device 2, and further converting this digital value into a numerical value included in the already selected numerical value group,
The display device 6 has the function of sequentially displaying the smallest number among these numbers. Furthermore, microcontroller 1
The ROM section 1-3 has the function of converting the temperature analog signal obtained through the temperature detection element 3 into a temperature digital signal and measuring it as in the case described above;
It has the function of counting the time signal taken in through the time pulse generating circuit 5 and measuring the heating time. In addition, the ROM 1-3 of the microcomputer 1 includes a predetermined function switch 7-1 and an analog variable variable device 4.
As shown in Figure 3, the heating function and heating time values set in A of RAM section 1-4 are respectively
The part and B part have a memorizing function.
Furthermore, in the ROM section 1-3 of the microcomputer 1, when a cancel switch 7-2 is pressed, the contents stored in the RAM section 1-4 are erased, and a heating start switch 7
When -3 is pressed, heating is started by operating the high frequency heat source 8, other attached heat source 9 such as a heater, or a combination thereof based on the heating content stored in the RAM section 1-4, and then It has the function of controlling these heat generation sources based on the above-mentioned heating temperature and heating time that were measured separately. Furthermore, the ROM section 1-3 of the microcomputer 1 is provided with a function of displaying on the display device 6 the progress of the heating content in progress, e.g., by subtracting the already set heating time as time passes, after the heating has started. There is. Next, the operation of the present invention in such a configuration will be explained. First, a predetermined heating function is selected from the function switch group 7-1, for example, high-output heating by the high-frequency heat source No. 1 in Table 1, and the switch 7-1 is turned on.
When is pressed, the ROM section 1-3 of the microcomputer 1 causes the display device 6 to display segments 6-6 and 6-5 of units appropriate for the selected heating time value, as shown in FIG. The minutes and seconds are displayed, and this heating function is stored in section A of the RAM section 1-4. Then, when the knob 4-1 of the analog variable variable device 4 is moved,
Immediately, the analog amount of the device 4 is changed to ROM section 1-3.
is converted into a digital value via the analog-to-digital conversion auxiliary device 2, and the numerical value corresponding to this digital value among the numerical values listed in No. 1 of Table 1 is displayed on the display device 6. be done.
Therefore, while looking at the display device 6, the knob 4
-1 to the required position, for example, the position shown in Fig. 5, B of ROM section 1-3.
This heating time is stored in the section. Next, when the heating start switch 7-3 is pressed, the ROM section 1-3 is pressed.
3, heating is started as described above based on the heating content stored in the RAM section 1-4, and the heating time displayed on the display device 6 is changed as shown in FIG. 5, for example. The value is gradually subtracted and displayed, and when this value shows 0 seconds, heating is stopped. Next, select steam heating using an attached heat generating source such as the steam heater No. 5 in Table 1 from the function switch group 7-1, and switch the switch 7-1.
When 1 is pressed, the display device 6 displays a segment 6-4, that is, a minute character, which is a unit appropriate for the selected heating time value, as shown in FIG. is displayed, and the heating function is further stored in section A of the RAM section 1-4. Then, when the knob 4-1 of the analog variable variable device 4 is moved, the numerical value corresponding to this analog value among the numerical values listed in No. 5 of Table 1 will be displayed on the display device 6, as in the case described above. will be displayed. Therefore, as in the case described above, the heating time can be set by moving the knob 4-1 to a required position, for example, the position shown in FIG. 5. Next, the heating start switch 7
When -3 is pressed, the ROM section 1-3 starts heating as described above based on the heating contents stored in the RAM section 1-4, and the heating time shown on the display device 6 is started. In this case, the time is gradually subtracted and displayed one minute at a time, and when this value shows 0 minutes, heating is stopped. As described above, according to the present invention, when a heating function is selected, a heating time group suitable for that function can be simultaneously selected. Moreover, the selected heating time group is directly displayed as a segment of characters meaning "minutes", "seconds", etc. to indicate short and long times. Therefore, there is no need to provide a numerical value switch from 0 to 9, a switch for determining the heating time period, etc., and the operation can be simplified.
Further, the recognition of the unit of heating time that occurs when a heating time group is suddenly selected does not require any special explanation, and the display contents can be easily determined without any mistake. Therefore, it is possible to obtain a useful high-frequency heating device that does not have the disadvantage of damaging food products due to incorrectly setting the heating time. In this embodiment, Kanji characters are used to represent "minutes" and "seconds," but the present invention is not limited to these and other characters can be used.

[Brief explanation of the drawing]

Fig. 1 shows the operation panel of a recent high-frequency heating device, Fig. 2 is an example of a block diagram of the main part of the control circuit of the high-frequency heating device of the present invention, and Fig. 3 also explains the operation of the RAM section of the microcomputer. FIG. 4 shows an operation panel section of the high-frequency heating device of the present invention, and FIG. 5 shows an example of the operation of the display device. Explanation of symbols, 1...Microcomputer, 1
-4... RAM section, 2... Auxiliary device for analog-to-digital conversion, 4... Analog amount variable device, 4-
1...Knob of the device, 6...Display device, 6-1
~6-3...Segment group for displaying numbers, 6-
4, 6-6... Segment displaying characters meaning minutes, 6-5... Segment displaying characters meaning seconds, 7... Operation switch group, 7-1...
Function switch group.

Claims (1)

[Claims] 1. A segment for displaying a heating time number of at least three digits, and a first and second segment placed to the right of the least significant digit of this number for displaying units meaning minutes and seconds, respectively, for the heating time. and a third segment disposed between the second and third digits counting from the least significant digit and displaying a unit indicating minutes of heating time, and setting the heating function. means for setting a heating time; and a so-called short-time heating time that uses the second and third segments as units for the heating time to be displayed on the display device in conjunction with the setting of the heating function setting means. or a so-called long-time display using only the first segment as a unit, and a control circuit that simultaneously controls the heating operation. High frequency heating equipment.