JP2003142245A - Electromagnetic cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic cooker protecting hands or the like from a burn caused by touching a top plate. SOLUTION: The electromagnetic cooker comprises a plurality of heat sources arranged under the top plate 2 on which, a cooking pot is to be placed, temperature sensors 63, 73 arranged at the appropriate positions of the heat sources detecting the temperature of the cooking pot through the top plate, a high temperature indication device 18 indicating when the temperature detected by the temperature sensors exceeds a prescribed temperature, a control circuit controlling the heat source and the high temperature indication device in compliance with the temperature detected by the temperature sensors, and light sign indication parts 15, 16, 17 arranged at the upper part of the heat sources, notifying the operation state of the heat sources by lighting. The control circuit is constructed so as to make the high temperature indication device and the light sign indication parts arranged at the heat source of the detected temperature sensor light or turn on and off simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic cooker provided with a plurality of heat sources below a top plate on which a cooking container is placed and heated.

[0002]

2. Description of the Related Art In a general electromagnetic cooker, an induction heating coil is arranged under a top plate mounted on the top surface of an appliance body, and a temperature sensor is arranged at a substantially central position of the induction heating coil. By detecting the temperature of the cooking container placed on the top plate by the temperature sensor and controlling the electric power supplied to the induction heating coil based on the detection result, the cooking object stored in the cooking container Is heating to the set temperature.

Further, when the temperature of the top plate detected by the temperature sensor reaches a predetermined temperature (around 70 ° C.) or more, there is a risk of burns if the top plate is touched by a hand or the like. It is lit to give a warning.
As shown in Japanese Patent Publication No. 001-257064, when one high-temperature display lamp is provided and a temperature sensor provided in any of a plurality of heat sources turns on the high-temperature display lamp when the temperature reaches the predetermined temperature, which heat source part has a high temperature There is a problem that it is difficult to understand.

Therefore, the above-mentioned Japanese Patent Laid-Open No. 2001-257064
As shown in the conventional example of the publication, a high temperature indicator lamp may be provided for each heat source, but providing a plurality of lamps only for high temperature indication is a waste of installation space as described in the publication. There are problems such as

Further, a comparatively large thermal power indicator composed of a plurality of lamps arranged in a line is provided at a position easily visible in front of a plurality of heat sources, and the set thermal power and a current display are displayed by turning on the thermal power indicator. Although some of the heat power indicators also function as high temperature caution indicator lamps after the above cooking and after the cooking is completed, there is a problem that it is difficult to confirm the operation display when the set heat power is low.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make the display of a high temperature portion easier to understand while using only one high temperature display lamp.

[0007]

According to the present invention, there is provided a top plate on which a cooking container is placed, a plurality of heat sources arranged below the top plate, and heat sources arranged at appropriate places of these heat sources. Via a temperature sensor for detecting the temperature of the cooking container, a high temperature indicator for displaying when the temperature detected by the temperature sensor reaches a preset temperature or higher, and a heat source depending on the temperature detected by the temperature sensor. With a control circuit for controlling a high-temperature indicator, etc., an optical sign indicator for indicating the operating state of the heat source by lighting is provided above the heat source, and the control circuit is configured so that one of the temperature sensors has a predetermined temperature or higher. When is detected, the high temperature display and the optical signature display provided in the heat source of the detected temperature sensor are configured to be turned on or blink at the same time.

According to the present invention, the optical signature display is configured to emit a plurality of colors, and the control circuit is configured to change the emission color of the optical signature display according to the temperature detected by the temperature sensor. It consists of

Further, according to the present invention, at least one of the plurality of heat sources is composed of a heater, and the control circuit is configured such that, after the power supply to the heater is stopped, the top plate temperature of the heater portion is in a temperature range in which residual heat can be used. The optical signature display is configured to emit light in a color different from that of high temperature display.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described first with reference to FIG. A top plate 2 made of aluminum is attached, and an intake / exhaust cover 4 having a large number of vent holes 3 ...

An operation panel 5 is arranged on the right side of the front surface of the electromagnetic cooker body 1, and a grill door 6 is arranged on the left side of the operation panel so as to be freely drawn out.

Further, below the top plate 2, induction heating coils 7 and 8 serving as heat sources are arranged on the left and right sides of the front plate, and
A radiant heater 9 is provided behind these heating coils, and a cooking container (not shown), which is also shown in FIG. 2, is placed on the top plate 2 above the respective heat sources 7, 8 and 9. The heating frames 10, 11 and 12 indicating the parts are provided by printing, and the decorative frame 1 is provided outside the colored parts 10 and 11.
3 and 14 are provided by printing.

Further, the heating frames 10, 1 of the top plate 2 are
An optical signature display 1 composed of a plurality of LED lamps that emit a plurality of colors and the like is provided on the outer side of 1, 12
5, 16 and 17 are arranged, and a high temperature indicator 18 for caution of high temperature is also arranged between the decorative frames 13 and 14 of the top plate 2, and a grill 6 or a lathe is arranged behind the high temperature indicator. A thermal power indicator 19 that displays the set thermal power of the gent heater 9 in three levels of "weak", "medium", and "strong" is arranged, and the induction heating coil 7, The thermal power indicators 20 and 21 that display the preset thermal power of 8 and the preset temperature in seven stages are arranged.

In the above embodiment, the optical signature display 1
5,16,17 and thermal power indicator 19,20,21 etc. LE
Although it is composed of a D lamp and is arranged below the top plate 2, it is not limited to this and may be composed of a fluorescent lamp or the like.

On the other hand, the operation panel 5 is mainly divided into three sections in the left-right direction as shown in FIG. 3, and a right and left seesaw type power switch 22 is provided at the upper right end. A key lock key 23 for setting / releasing a key lock is provided under the lower part, and the left end of the three sections is for operating the induction heating coil 7, the center is for operating the grill 6 and the radiant heater 9, and the right end is for induction heating. It is set to operate the coil 8.

Display units 24, 25, and 26 composed of liquid crystal panels are arranged above the three sections, and a cancel key 27 ... And a time setting key 28 are disposed below these display units. .., minute setting keys 29 .. are arranged in a horizontal row, and below the central keys 27, 28, 29, an operation key 30 for turning on / off the power supply to the heater in the grill 6 is provided. And a heating power setting key 31 are arranged, and below the respective keys 27, 28, 29 on the right side, a fried food key 32 for setting fried food cooking is arranged.

Furthermore, at the bottom of the above-mentioned three sections, there are arranged knobs 33, ...
When the knob is pulled out, energization to the induction heating coils 7 and 8 and the radiant heater 9 is started, when the knob is pushed in, the operation is stopped, and when the knob is rotated, the heating power can be set.

In the above embodiment, the deep-fried food key 32 is arranged only in the operation portion for the induction heating coil 8 on the right side, but the invention is not limited to this, and both the right and left stoves and the radiant heater 9 are provided. These functions may be added to.

FIG. 4 shows a circuit block diagram for controlling the energization of the induction heating coils 7, 8 and the like.
Input power monitor circuits 37, 37 are connected to a 0V power source 35 via a filter circuit 36 and the power switch 22, and a right stove control circuit 38 and a left stove control circuit 39 are connected to their outputs. .

The output of the filter circuit 36 is
A power supply circuit 41 for the main and right hobs and a power supply circuit 42 for the left stove are connected via a self-holding relay contact 40, and a power supply circuit for the main and right stove has a main control circuit 43 and the right side. The stove control circuit 38 is connected, and the left stove power supply circuit 42 is connected to the left stove control circuit 39.

The right stove control circuit 38, the left stove control circuit 39, and the main control circuit 43 are each composed of a microcomputer, and the keys arranged on the operation panel 5 are provided at the input ports of the main control circuit 43. The key input circuit 44 for detecting the ON operation of the switch is connected to the operation switch circuit 45 which is turned on / off by the push operation of the knob 33. The electromagnetic cooker main body 1 is connected to the display units 15, 16, 17 and the high temperature display unit 18, and the thermal power display units 19, 20, 21 via a cooling fan drive 47.
A cooling fan 48 and a grill fan 49 mounted inside are connected, a power supply relay drive circuit 51 for driving the relay contact 40 is connected via a relay drive circuit 50, and a notification buzzer 52 is connected. There is.

Further, the right stove control circuit 38 and the left stove control circuit 39 are connected to the input / output port of the main control circuit 43 by a communication line 53, and the display 24 arranged on the operation panel 5 is connected. , 25 and 26 are connected to the LCD driver 54.

On the other hand, an output circuit of the right stove control circuit 38 is connected with an inverter circuit 56 for supplying high frequency power to the right induction heating coil 8 via an IGBT drive circuit 55, and a grill lower heater drive circuit. The lower grille heater 58 arranged in the lower part of the grille 6 is connected via 57, and the gradient heater 9 is connected via a gradient heater drive circuit 59.

Further, a thermostat 61, which is arranged at an appropriate position of the gradient heater 9 through a gradient temperature detection circuit 60, is provided at the input port of the right stove control circuit 38.
A pan bottom thermistor 63 arranged substantially in the center of the induction heating coil 8 and a non-volatile memory 64 for storing various data are connected via a temperature detection circuit 62.

Further, at the output port of the left stove control circuit 39, an inverter circuit 66 for supplying high frequency power to the left induction heating coil 7 via an IGBT drive circuit 65, and a grill heater drive circuit 67 are provided. The grille upper heater 68 arranged in the upper portion of the grille 6 is connected to the nonvolatile memory 69 for storing data via the grille 6.

Further, the input circuit of the left stove control circuit 39 is arranged at a substantially central portion of the upper thermistor 71, the lower thermistor 72 and the induction heating coil 7 which are arranged in the grill 6 through the temperature detecting circuit 70. The pan bottom thermistor 73 is connected.

The pan bottom thermistors 63 and 73 are configured to detect the temperature of the top plate 2 to detect the temperature of the cooking container placed on the top plate.

The operation for boiling water according to the structure of the present invention will now be described. The induction heating coil 7,
8 and the radiant heater 9 above the cooking container, and set the cooking time by operating the time setting keys 28, ... and minute setting keys 29, ... arranged on the operation panel 5, and push the knob 33 ,. Then, the induction heating coils 7 and 8 and the radiant heater 9 that have been operated are energized to start heating.

Further, the heat power can be adjusted by rotating the knobs 33, ..., and the set heat power can be adjusted by the heat power indicators 19, 20, 21 arranged on the top plate 2 and the indicator 2 on the operation panel 5.
It can be confirmed by 4, 25, 26.

On the other hand, at the same time as the heating is started, the optical signature indicators 15, 16 and 17 of the heat sources that have started are turned on, for example, in red so that the heat source in use can be visually confirmed and the top plate The high temperature indicator 18 arranged in 2 is turned on to call attention.

FIG. 5 shows the optical signature indicators 15, 16 and
An example of the lighting operation of the high temperature indicator 17 and the high temperature indicator 18 is shown.
6 and 17 and the high temperature indicator 18 are turned on, and when cooking is finished and power to the heat source is stopped, the pan bottom thermistor 63,
Depending on the temperature detected by 73 or the thermostat 61, the optical signature indicators 15, 16, 17 and the high temperature indicator 18 are turned on or blinked as shown in the figure.

With these configurations, the optical signature display 1
It is possible to easily check the heat source in use at 5, 16 and 17 visually, and it is possible to prevent burns due to contact of the top plate 2 with the hand etc. of the heat source in use and forgetting to turn off the heat source. It is a thing.

When the temperature of the top plate 2 has risen above a predetermined temperature due to residual heat after cooking, the high temperature indicator 1
At the same time to call attention by 8, the optical signature indicator 15,1
By displaying a high temperature portion by lighting or blinking 6, 17 and displaying a high temperature portion around the high temperature indicator 18, for example, by printing 74, a high temperature portion can be displayed. It is possible to improve the appearance of the top plate without having to print "."

Further, regarding the optical signature display 17 of the portion of the radiant heater 9 where the temperature rises most during cooking, the optical signature display is used by changing the emission color according to the residual heat temperature. Then, the residual heat temperature of the top board 2 can be displayed, and the usability can be improved.

The top plate 2 of the above-mentioned radiant heater 9 part
The temperature generally reaches around 500 ° C. during high-temperature cooking, and at this time, for example, when the boiling water is kept warm, the temperature can be kept for about 10 minutes.

It should be noted that the lighting and blinking operations of the respective display units shown in FIG. 5, the color of light emitted, etc. are not limited to these, and may be appropriately selected in accordance with the characteristics and price of the lamp or the like used.

[0037]

According to the structure of the present invention, an optical signature indicator is provided on each heat source portion of the top plate and one high temperature indicator is provided, and when the temperature of the top plate rises above a predetermined temperature. Is configured to illuminate or blink the high temperature indicator and the optical sign indicator of the heat source part where the temperature is rising, so that the high temperature part of the top plate can be clearly displayed using the optical sign indicator, This makes it possible to further improve safety.

Further, according to the configuration of the present invention, the light emission color of the optical signature display is changed according to the temperature of the top plate, so that the cooling state of the top plate after the completion of cooking can be accurately grasped visually. If the cooking container is placed on the top plate as it is, the safety can be improved as a guide for knowing the temperature of the cooking container, or as a guide for the correction of the cooking time when cooking continuously, for example. By doing so, usability can be improved.

Further, according to the structure of the present invention, the display of the optical signature display of the heater portion emits a color different from that of the high temperature display when the temperature of the top plate of the heater portion is in a temperature range where residual heat can be used. With this configuration, it is possible to display the residual heat temperature in more detail using the optical signature display, which prevents the food from overcooling and greatly improves usability. is there.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of an operation panel of the same.

FIG. 4 is a block diagram showing an embodiment of a control circuit of the same.

FIG. 5 is an explanatory view of the operation of the same display device.

[Explanation of symbols]

2 Top plate 7 induction heating coil 8 induction heating coil 9 Radiant heater 15 Optical signature display 16 Optical sign display 17 Optical signature display 18 High temperature indicator 38 Control circuit for right stove 42 Left stove control circuit 43 Main control circuit 61 thermostat 63 Pan-bottom thermistor 73 Pan-bottom thermistor

Continued front page    (72) Inventor Toshiya Nishimoto             3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori             Sanyo Electric Co., Ltd. (72) Inventor Masami Akemi             3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori             Sanyo Electric Co., Ltd. (72) Inventor Takuo Ohara             3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori             Sanyo Electric Co., Ltd. F-term (reference) 3K051 AB02 AB14 AC33

Claims (3)

[Claims] 1. A top plate on which a cooking container is placed, a plurality of heat sources arranged below the top plate, and a plurality of heat sources arranged at appropriate places of these heat sources, and the temperature of the cooking container via the top plate. Temperature sensor for detecting the temperature, one high temperature indicator for displaying when the temperature detected by the temperature sensor reaches a predetermined temperature or higher, and the heat source or high temperature indicator according to the temperature detected by the temperature sensor. In the one provided with a control circuit for controlling the above, while providing an optical signature indicator above the heat source for notifying the operating state of the heat source by lighting, the control circuit is arranged so that one of the temperature sensors has a predetermined temperature or higher. An electromagnetic cooker characterized in that, at the time of detection, the high temperature indicator and an optical signature indicator provided at the heat source of the detected temperature sensor are simultaneously turned on or blinked. 2. The optical signature display is configured to emit a plurality of colors, and the control circuit is configured to change the emission color of the optical signature display according to the temperature detected by the temperature sensor. The electromagnetic cooker according to claim 1, wherein the electromagnetic cooker is configured. 3. When at least one of the plurality of heat sources is composed of a heater, and when the control circuit is in a temperature range where the top plate temperature of the heater portion can utilize the residual heat after the energization of the heater is stopped. , Characterized in that the optical signature display is configured to emit light in a color different from that of high temperature display,
The electromagnetic cooker according to claim 2.