JPH0547463A - Electromagnetic induction heating cooking device - Google Patents

Abstract

PURPOSE:To provide a wide range of cooking menus by fitting two types of large and small induction heating coils, a sensor to detect heating temperature and an indicator lamp, and causing heating output and time to be automatically set via the operation of a key. CONSTITUTION:When a plug is connected to a power supply, the indicator lamps of menu indicators 10 and 11 flush alternately to indicate an instruction for operating either a 'pan' key or a 'hot plate' key. For example, when 'roast meat' is set with the operation of the key to keep a corresponding indicator lamp lighting, and a start key 12 below an indicator for instructing the next operation is operated after the flushing of the lamp, '1400' in an output indicator group 19 lights, and a digital indicator 20 shows '260'. This indication means that a cooking condition is automatically set at a heating temperature of 260 deg.C with power of 1400 W. Also, heating temperature is temporarily lowered to a minimum level and, then, gradually raised to the predetermined heating level after the operation of the key 12. A danger due to boiling in a heated vessel and element deterioration due to a sudden current can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved induction heating section of an electromagnetic induction heating cooker (hereinafter referred to as an electromagnetic cooker).

[0002]

2. Description of the Related Art FIG. 7 is a sectional view showing a configuration example of a conventional electromagnetic cooker, and FIG. 8 is a front view showing each part of an operation panel in FIG. 7 and 8, 1 is an operation panel, 2 is
Is a coil for electromagnetic induction heating, 3 is a coil support frame, 4 is a protective plate on which the heated container 5 is placed, 6 is a power switch, 7 is an indicator light, and is turned on or off according to whether the power switch 6 is on or off. .. Reference numeral 8 is a slide-type variable resistor for changing the heating output, and 9 is a pointer for displaying the heating output in conjunction with the variable resistor 8.

In the electromagnetic cooker having the above structure,
When the power switch 6 is turned on and the power is turned on, the coil 2 receives 20
A high-frequency current of up to 30 KHz flows, an eddy current due to electromagnetic induction is generated in the heated container 5, and the Joule heat heats the cooked food. On the other hand, with the energization, the indicator lamp 7 lights up, the output increases as the variable resistor 8 is moved from left to right, and the heating output can be varied within the range of 200 to 1200 W. Select output and cook.

[0004]

In the conventional electromagnetic cooker as described above, only the heating output can be adjusted during use, and there is no function of selecting the heating temperature. Therefore, there is a problem that the heating temperature cannot be set and used according to the cooked food and the timer function is not provided, so that the heating time cannot be predetermined and the cooking cannot be performed automatically. Further, since the diameter of the coil 2 for electromagnetic induction heating is about 180 mm, there is a problem that the size of the heated container 5 to be subjected to induction heating is restricted.

The present invention has been made to solve the above problems, and the heating temperature of the container to be heated during use can be selected, and the energization is automatically cut off at the preset cooking time. It is an object of the present invention to provide an electromagnetic cooker capable of using a heated container larger than the conventional one.

[0006]

SUMMARY OF THE INVENTION An electromagnetic cooker according to the present invention comprises a heating coil divided to correspond to two types of large and small containers to be heated, a sensor for detecting a heating temperature, and large and small objects to be heated. Operation keys for selecting a container, indicator lights that light up and display multiple cooking menus provided for each operation key, indicator lights that blink until the start key is operated, and heating output and heating time are automatically set when the start key is operated. A control means for selectively setting and displaying is provided.

In addition, an automatically set heating output, an operation key that can adjust the temperature and a timer operation key that determines the heating time are provided within a range not exceeding the upper limit value set in each cooking menu. is there.

Further, the heating time is preferentially displayed, and the numeral display for displaying the heating time also is provided, and the display for displaying the heating output by the bar graphic is provided.

Further, when the heating output is reset, the control means is provided for temporarily lowering the heating temperature and then raising it to a predetermined heating temperature.

Further, when the heating temperature is reset or the timer time is set, a display is provided which blinks in the vicinity of the operation key for adjusting the temperature or time.

[0011]

In the present invention, when the desired cooking menu is selected and the start key is operated, the heating output and the heating temperature are automatically set. In addition, this heating output set automatically, when adjusting the temperature again and again and when setting the heating time by the timer, these heating outputs,
The temperature and time do not exceed the upper limit set for each cooking menu. Further, the numerical indicator displays the heating time with priority over the timer time, and even if the timer time is displayed, the display returns to the heating time display after a predetermined time, and this display is held. In addition, the heating output display, which is displayed as a bar graphic, can be used to determine the degree of fire. Further, after resetting the heating output, the heating temperature becomes the minimum value, and there is no possibility that boiling or the like will occur in the heated container until the heating temperature gradually rises to the predetermined temperature. Further, when the heating temperature is reset or the timer time is set, the indicator flashes in the vicinity of the operation keys for adjusting these temperatures or times, so that there is no risk of erroneous operation.

[0012]

1 is a circuit diagram of an electromagnetic cooker according to an embodiment of the present invention, FIG. 2 is a front view showing details of an operation panel surface, and FIG. 3 is a perspective view showing a schematic appearance of the electromagnetic cooker. 4 is shown in FIG.
5 is a cross-sectional view showing the main part of the heating function in FIG. 5, FIG. 5 is a perspective view showing a state in which a heated container having a relatively large induction heating area is placed on the electromagnetic cooker in FIG. 3, and FIG. It is a perspective view which shows the state which mounted the to-be-heated container with a small area.

In FIG. 1, reference numeral 21a is the first corui 2
a, a relay contact for switching the second coil 2b, 21b the relay, 22 a contact group such as the start key 12 and the output setting key 14 arranged on the operation panel 1, and 23 a light emitting diode display Device group, 25 is a switching element that outputs a high frequency, 26 is a drive circuit for the switching element 25, 27 is a control device including a microcomputer,
28 is a D / A converter that sets the output of the drive circuit 26;
Reference numeral 9 is a temperature sensor fixed to the protective plate 4a, and 30 is a power plug.

2 to 6, reference numeral 1 denotes an operation panel, 2
a is a first coil for electromagnetically heating the container 5 to be heated such as a pan, 2b is provided on the outer periphery of the first coil 2a, and is energized together with the first coil 2a to be relatively larger than the pan. The second coil for electromagnetically heating the heated container 5 having an area, 4a is a protection plate, 4b is the heated container 5
An electromagnetic induction plate on which is mounted, 10 is a menu display for cooking with a heated container 5 such as a pan, and 11 is a menu display for cooking with a heated container 5 such as a hot plate having a larger area such as a pan. , 12 is a start key, 13 is an indicator that lights up when the start key 12 is turned on, 14 is an output change selection key, 15 is a temperature change selection key, 16 is a timer key, 17a and 17b are setting change keys, 18 is an indicator, 1
9 is an output display group, and 20 is a numerical display that also displays the heating temperature and the timer time.

In the electromagnetic cooker according to the present invention having the above-mentioned structure, when the power plug of FIG. 1 is connected to the commercial power source, the indicator lamps of the menu indicators 10 and 11 alternately blink every second and the "pot" is displayed. Instruct to operate either the "" key or the "hot plate" key. Next, when the user operates the "pot" key once, only the indicator light of the "Sukiyaki" menu in the menu display 10 is turned on. Further, when the "pot" key is operated, "stew" and "fried" are sequentially turned on to set the user's desired cooking. Similarly, when the "hot plate" key is operated, "barbecue", "hot cake", and "steamed food" in the menu display 11 are turned on in this order. For example, when the "Yakiniku" is set by the above operation and the indicator lamp is kept lit, and the start key 12 below the indicator 13 which blinks to instruct the next operation is operated, the output indicator group 19 is displayed. Of "14
When the display lamp of "00" is turned on and "260" is displayed on the numerical display 20, it is known that the heating output is 1400 W and the cooking condition is automatically set by the heating temperature of 260 ° C. When it is desired to change each output automatically set as described above, operating the output change setting key 14 causes the display lamps of the output display group 19 to display "600", "80".
0 "," 1000 "," 1200 "are lit in this order. For example, if the" 1200 "lighting is maintained, the heating output of 1200 W is set, and then the temperature change selection key 15
When is operated, the display 18 blinks and the setting change key 17a
Alternatively, if the set temperature is adjusted by operating 17b, and the operation of the numeral display 20 is displayed as "280" and the operation is stopped,
This means that the heating temperature has been changed to 280 ° C.

Further, the numerical display 20 can set the timer time and confirm the remaining time during cooking. That is, when the timer key 16 is operated to set the timer time, the display 18 blinks, and the setting change keys 17a, 1
7b is operated to set a desired cooking time on the numerical display 20. In addition, if you want to check the remaining time during cooking after this setting, operate the timer key 16 to display the number display 2
The display of the heating temperature displayed at 0 disappears, the remaining time is displayed, and the display of the original heating temperature returns after a few seconds. In addition, the above keys 14, 15, 16 are the start key 12
Operates effectively regardless of the operation before and after the operation.

Further, when the output key 14 is operated, the conversion output of the D / A converter 28 is controlled by the output of the drive circuit 26 after the operation of the start key 12 to once bring the heating temperature to the minimum value, and then to a predetermined value. The heating temperature is gradually increased. In addition, the heating temperature, heating output, and the time set by the timer are restricted so that they do not exceed the respective values set for each cooking menu. For example, when setting to the "hot cake" menu, the heating output 800W, heating temperature 180 ° C, heating time 1
Control the pancakes so that they are not charred by limiting them so that they do not exceed the time.

In the above embodiment, the heating output is indicated by turning on the output display group 19. However, if the heating output is displayed by a bar graphic, it is possible to judge the degree of fire by feeling. ..

[0019]

As described above, according to the present invention, the heating area of the container to be heated can be divided into two types, large and small, and can be selected. Further, by setting a plurality of cooking menus corresponding to each of these regions, Since the heating output and the heating temperature are automatically determined, a wide range of cooking menus can be obtained and the cooking method can be simplified.

The automatically set heating output and temperature can be adjusted according to the cooking material and quantity, and the cooking time can be set by a timer. Since the value is not exceeded, higher quality cooking results can be obtained.

Further, since the heating output is displayed in a bar graphic, it is possible to judge at a glance how much heat is added during cooking.

In addition, when the value of the heating output after setting is adjusted, the heating output is once set to the minimum value and then gradually increased to a predetermined value, so that there is a risk of boiling in the container to be heated. Absent.

Further, since the numeral display is provided for both the heating temperature and the timer time, the cost can be reduced, and the heating temperature is preferentially displayed so that the usability is improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an electromagnetic cooker according to an embodiment of the present invention.

FIG. 2 is a front view showing details of an operation panel surface.

FIG. 3 is a perspective view showing a schematic appearance of an electromagnetic cooker.

4 is a cross-sectional view showing a main part of a heating function in FIG.

5 is a perspective view showing a state in which a heated container having a relatively large induction heating area is placed on the electromagnetic cooker of FIG.

FIG. 6 is also a perspective view showing a state in which a heated container having a relatively small induction heating area is placed.

FIG. 7 is a cross-sectional view showing a configuration example of a conventional electromagnetic cooker.

8 is a front view showing the configuration of each part of the operation panel in FIG.

[Explanation of symbols]

 2a 1st coil 2b 2nd coil 5 Heated container 10 Menu display 11 Menu display 12 Start key 13 Indicator 14 Output change selection key 15 Temperature change selection key 16 Timer key 17a Setting change key 17b Setting change key 18 Display Device 19 Output display group 20 Numerical display device 27 Control device 29 Temperature sensor

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[Procedure amendment]

[Submission date] December 13, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Further, the heating temperature is preferentially displayed, and a numerical display for displaying the heating time is also provided, and a display for displaying the heating output in a bar graphic is provided.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, when the heating output is reset, the control means is provided for temporarily lowering the heating output and then raising it to a predetermined heating output.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

In the present invention, when the desired cooking menu is selected and the start key is operated, the heating output and the heating temperature are automatically set. In addition, this heating output set automatically, when adjusting the temperature again and again and when setting the heating time by the timer, these heating outputs,
The temperature and time do not exceed the upper limit set for each cooking menu. In addition, the numerical display displays the heating temperature with priority over the timer time, and even if the timer time is displayed, the display returns to the heating temperature display after a predetermined time and keeps this display. In addition, the heating output display, which is displayed as a bar graphic, can be used to determine the degree of fire. Further, after resetting the heating output, the heating output becomes the minimum value, and there is no possibility that boiling or the like will occur in the heated container until the heating output gradually rises to a predetermined output. Further, when the heating temperature is reset or the timer time is set, the indicator flashes in the vicinity of the operation keys for adjusting these temperatures or times, so that there is no risk of erroneous operation.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Further, when the output key 14 is operated, the conversion output of the D / A converter 28 is controlled by the output of the drive circuit 26 after the start key 12 is operated to once set the heating output to the minimum value, and then the predetermined value is obtained. The heating output is gradually increased. In addition, the heating temperature, heating output, and the time set by the timer are restricted so that they do not exceed the respective values set for each cooking menu. For example, when setting to the "hot cake" menu, the heating output 800W, heating temperature 180 ° C, heating time 1
Control the pancakes so that they are not charred by limiting them so that they do not exceed the time.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

In addition, when the value of the heating output after setting is adjusted, the heating output is once set to the minimum value and then gradually increased to a predetermined value. Prevents element deterioration due to sudden changes in current.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsumasa Kubota 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd. Within Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. A coil for induction heating, which is divided and provided so as to correspond to two types of containers to be heated, large and small, a sensor for detecting a heating temperature by these coils, and the large and small containers to be heated. An operation key for selecting, an indicator light for sequentially lighting and selecting a plurality of cooking menus provided for each operation key, and a display provided near the start key operated at the time of start-up for blinking until the start operation is performed. A light,
An electromagnetic induction heating cooker comprising: a control means for automatically setting and displaying a heating output and a heating time when the start key is operated. 2. A heating output which is automatically set at first, an operation key capable of adjusting temperature, and a timer operation key which determines a heating time within a range not exceeding an upper limit value set for each cooking menu. The electromagnetic induction heating cooker according to claim 1, wherein one or all of them are provided. 3. A numerical display for displaying the heating time preferentially and also for displaying the heating time, and a display for displaying the heating output in a bar graphic are provided. Electromagnetic induction heating cooker. 4. A control means is provided which, when the operation key for resetting the heating output is operated, temporarily lowers the heating temperature and then gradually raises it to a predetermined heating temperature. 3. An electromagnetic induction heating cooker according to 3. 5. When an operation key for resetting a heating temperature or an operation key for setting a timer time is operated, an indicator provided in the vicinity of the operation key for adjusting the temperature or time blinks for a predetermined time. The electromagnetic induction heating cooker according to any one of claims 1 to 4, further comprising control means for enabling the setting operation within the blinking time.