JP2003197360A - Electromagnetic cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inform unsuitability of cooking contents or a cooking container more clearly. <P>SOLUTION: This electromagnetic cooker is provided with induction heating coils 3 and 4 arranged beneath a top plate 2 for placing the cooking container, heating power indicators 19 and 20 indicating heating power of the induction heating coils, heating condition indicators 14 and 15 indicating the operation condition of the induction heating coils, and a control circuit. The control circuit is provided with pot detection means 74 and 75 detecting whether the cooking container is placed on the induction heating coil in the top plate or not or detecting a material of the cooking container, and the control circuit is constructed so that the heating power indicator and the heating condition indicator are driven to be intermittently flashed when absence of a pot is detected by a pot detection means. <P>COPYRIGHT: (C)2003,JPO

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 an induction heating coil below a top plate on which a cooking container is placed and heated.

[0002]

2. Description of the Related Art In recent years, the demand for electromagnetic cookers in households has been rapidly increasing, and unlike a gas stove, no flames are produced, so there are few accidents such as fire and burns, but it is difficult to confirm the heating state .

Therefore, for example, Design Registration No. 1104736
As disclosed in Japanese Patent Publication No. JP-A-2003-264, a ring-shaped heating status indicator that emits light during heating is provided above the induction heating coil on the top plate to make it easier to understand the energization status to the induction heating coil.

On the other hand, the electromagnetic cooker has a function of determining whether or not there is a cooking container such as a cooking pot on the top plate and whether or not the material of the cooking container is suitable for induction heating. Even if it is determined by the function that the cooking container is not suitable for induction heating, there is a problem that it is difficult to confirm the error content because the warning lamp arranged on the operation panel is informed by blinking.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to use a heating status indicator to more clearly inform the user of the contents of cooking or the incompatibility of cooking containers.

[0006]

According to the present invention, there is provided a top plate on which a cooking container is placed, an induction heating coil disposed below the top plate, and a thermal power indicator for displaying the thermal power of the induction heating coil. , In a device equipped with a heating status display for displaying the operating status of the induction heating coil and a control circuit for controlling the thermal power display, heating status display, etc. A pan detector is provided to detect the presence / absence of a cooking container and the material of the cooking container, and the control circuit uses a heating power indicator and a heating status indicator when the pan detector detects the absence of a pot when the induction heating coil is energized. Is configured to be driven by blinking.

Further, according to the present invention, at least the heating state indicator is constructed so as to be capable of emitting two or more colors, and the control circuit is constructed so as to change the luminescent color of the heating state indicator in accordance with the contents of cooking. is there.

Further, the present invention comprises a fried food indicator provided in the vicinity of the thermal power indicator, and the control circuit is configured to turn on the thermal power indicator and the fried food indicator at the same time when fried food cooking is selected. It is a thing.

Further, according to the present invention, the control circuit is configured to drive the thermal power indicator and the heating status indicator and the fried food indicator to blink at the same time when the pan detection means detects the absence of the pot or the like when cooking the fried food. Is.

[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 metal is attached, and a pair of left and right induction heating coils 3 and 4 and a gradient heater 5 which are heat sources are built in the lower part of the top plate.

An operation panel 6 is provided on the right side of the front surface of the main body of the electromagnetic cooker, and a door 8 for the grill 7 is provided on the left side of the operation panel so as to be freely drawn out.
In addition, heating frames 9, 10, and 11 showing a mounting portion of a cooking container (not shown in FIG. 2) are provided on the upper portions of the heat sources 3, 4, and 5 of the top plate 2 by printing, Decorative frames 12 and 13 are provided on the outside of the heating frames 9 and 10 by printing.

Further, the heating frames 9, 10, 11 of the top plate 2 are
In front of the outer side, there are multiple LEs that emit multiple colors.
Heating status indicators 14, 15 composed of D lamps, etc.
16 are arranged, and the decorative frames 12 and 1 of the top plate 2 are also arranged.
A high temperature indicator 17 for high temperature attention is arranged between the three, and the set heat power of the grill 7 or the radiant heater 5 is set to three levels of "weak", "medium" and "strong" behind the high temperature indicator. A thermal power indicator 18 for displaying is arranged, and the high temperature indicator 1 is also provided.
On the left and right sides of the front side of 7, heat power indicators 19 and 2 for displaying the set heat power and set temperature of the induction heating coils 3 and 4 in seven stages
0 is set.

Further, a fried food display 21 is arranged in the vicinity of, for example, the lower side of the thermal power display 20 to emit light and display when fried food is selected.

In the above embodiment, the optical signature display 1
4, 15, 16 and thermal power indicators 18, 19, 20 etc.
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, as shown in FIG. 3, the operation panel 6 is mainly divided into three sections in the left-right direction, and a right and left seesaw type power switch 21 is provided at the upper right end. A key lock key 22 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 3, the center is for operating the grill 7 and the radiant heater 5, and the right end is for induction heating. It is set to operate the coil 4.

Display units 23, 24 and 25 each composed of a liquid crystal panel are disposed above each of the three sections, and a cancel key 26 ... And a time setting key 27 are disposed below these display units. .., minute setting keys 28 .. are arranged in a horizontal row, respectively, and below the central keys 26, 27, 28, an operation key 29 for turning on / off the power supply to the heater in the grill 7. And a heating power setting key 30 are arranged, and a fried food key 31 for setting fried food cooking is arranged under the respective keys 26, 27, 28 on the right side.

Further, at the bottom of the above-mentioned three sections, a push-push operation and a rotary operation knob 32 for operating and setting heat power are arranged, and by the push-push operation,
When the knob is pulled out, energization to the induction heating coils 3 and 4 and the radiant heater 5 is started, when it is pushed in, the operation is stopped, and when it is rotated at the pulled-out position, the heating power can be set.

In the above embodiment, the deep-fried food key 31 is arranged only in the operation portion for the induction heating coil 4 on the right side, but the present invention is not limited to this, and both the right and left stoves and the gradient heater 5 are arranged. 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 the 0V power source 35 via the filter circuit 36 and the power switch 21, and a right stove control circuit 38 and a left stove control circuit 39 are connected to these 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 knob is connected to the operation switch circuit 45 which is turned on / off by the push operation of the knob 33 ... And the heating state is also supplied to the output port via the LED drive circuit 46. A cooling fan 48 which is connected to the display devices 14, 15, 16 and the high temperature display device 17, the thermal power display devices 18, 19, 20 and the fried food display device 21 and is mounted in the electromagnetic cooker body 1 via a cooling fan drive 47. And the relay contact 4 via the relay drive circuit 50.
A power supply relay drive circuit 51 for driving 0 is connected, and a buzzer 52 for notification is further connected.

The right control panel 38 and the left control panel 39 are connected to the input / output port of the main control circuit 43 by the communication line 53, and the display 23 arranged on the operation panel 6 is connected. , 24, 25 are connected to an LCD driver 54.

On the other hand, an output circuit of the right stove control circuit 38 is connected to an inverter circuit 56 for supplying high frequency power to the right induction heating coil 4 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 7 is connected via 57, and the gradient heater 5 is connected via a gradient heater drive circuit 59.

The right stove control circuit 38 has an input port through which a thermostat 61 is placed at an appropriate position of the gradient heater 5 via a gradient temperature detection circuit 60.
A pan bottom thermistor 63 arranged substantially in the center of the induction heating coil 4 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 3 via an IGBT drive circuit 65 and a grill heater drive circuit 67 are provided. The grill upper heater 68 arranged in the upper portion of the grill 7 is connected to the nonvolatile memory 69 for storing data.

In addition, 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 3 which are arranged in the grill 7 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.

Further, the right stove control circuit 38 and the left stove control circuit 39 include inverter circuits 56, 6 respectively.
When high frequency power is supplied to the induction heating coils 3 and 4 from 6,
Input power monitor circuits 37, 37 and temperature detection circuit 62,
The output of 70 is compared with reference data or the like, and whether the cooking container placed on the top plate 2 above the induction heating coils 3 and 4 is a material suitable for induction heating, or the cooking container is placed. It is provided with pan detecting means 74, 75 for determining whether or not.

The operation of boiling water according to the structure of the present invention will now be described. The induction heating coil 3,
4 or a radiant heater 5 on which a cooking container is placed, the cooking time is set by operating the time setting keys 27, ... and the minute setting keys 28, ... arranged on the operation panel 6, and the knobs 32, ... are pushed. Then, the induction heating coils 3 and 4 and the radiant heater 5 that have been operated are energized to start heating.

Further, the heat power can be adjusted by rotating the knobs 32 ,. The set heat power is displayed by the heat power indicators 18, 19, 20 arranged on the top plate 2 and the indicator 2 on the operation panel 6.
It can be confirmed by 3, 24, 25.

On the other hand, simultaneously with the start of heating, the heating state indicators 14, 15, 16 of the started heat source 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 17 arranged in 2 is turned on to call attention.

Further, when the fried food key 31 is turned on and the fried food is selected and set, the main control circuit 43 turns on the fried food indicator 21 to confirm that the fried food is selected and set. Display clearly.

Further, as shown in FIG. 5, for example, the main control circuit 43, when the timer cooking is set by the input operation by the time setting key 27 ... or the minute setting key 28 ... The above heating status indicators 14, 15, 16
Is lit in green, for example, to clearly indicate that it is different from normal heating in which the cooking time is not set.
With the display of 3, 24, 25, you can easily check the timer cooking.

Further, the main control circuit 43 is
If the cooking container placed on the induction heating coils 3 and 4 of the top plate 2 is not suitable for induction heating, or if the heating start operation is performed when the cooking container is not placed, For heating, for example, the heating status indicators 14 and 15 are driven to blink in red, and in timer cooking, to blink in green, and when heating the fried food, the heating status indicators 14 and 15 are blinked in, for example, orange, and at the same time, the fried food indicator 21 also changes to orange, for example. It is configured such that the blinking drive is performed, and by these configurations, it is possible to more clearly notify the occurrence of an abnormality and improve the usability.

The lighting and blinking operations of the respective display devices shown in FIG. 5, the color of light emitted, etc. are not limited to these, and may be appropriately selected according to the characteristics and price of the lamp or the like used.

[0036]

According to the structure of the present invention, a heating power indicator for displaying the heating power of the induction heating coil is provided, and a heating state indicator is provided at the heat source portion of the top plate. At the time of detection, the thermal power indicator and the heating status indicator are configured to blink and drive at the same time, so that the occurrence of an abnormality can be more clearly displayed, thereby improving the usability.

Further, according to the constitution of the present invention, the heating state indicator is made to be capable of emitting light of two or more colors, and the emission color is changed according to the contents of cooking. The contents can be easily judged and the usability can be improved.

Further, according to the configuration of the present invention, the fried food indicator is provided in the vicinity of the fired power indicator, and the fried food indicator and the fried food indicator are simultaneously turned on when the fried food is cooked. Higher frying food can be displayed more clearly, which improves usability and safety.

Further, according to the configuration of the present invention, when detecting the absence of a pan or the like during cooking of fried food, a thermal power indicator and a heating state indicator,
By configuring the fried food display device to blink simultaneously, it is possible to more clearly notify the occurrence of an abnormality and improve usability.

[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 3 induction heating coil 4 induction heating coil 14 Heating status indicator 15 Heating status indicator 19 Thermal power indicator 20 thermal power indicator 21 fried food display 38 Control circuit for right stove 39 Left stove control circuit 43 Main control circuit 74 Pot detection means 75 Pan detection means

   ─────────────────────────────────────────────────── ─── 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 AB14 AD10 AD39 CD02

Claims (4)

[Claims] 1. A top plate on which a cooking container is placed, an induction heating coil arranged below the top plate, a thermal power indicator for displaying the thermal power of the induction heating coil, and an operating state of the induction heating coil. In the one provided with a heating state indicator for displaying and a control circuit for controlling the thermal power indicator, the heating state indicator, etc., the control circuit includes the presence or absence of a cooking container above the induction heating coil of the top plate, In addition to providing a pan detection means for detecting the material of the cooking container, the control circuit is configured to display the heating power indicator and the heating status indicator when the pan detection means detects the absence of a pan when the induction heating coil is energized. An electromagnetic cooker characterized by being configured to drive in a blinking manner. 2. The heating state indicator is configured to be capable of emitting light of two or more colors, and the control circuit is configured to change the emission color of the heating state indicator according to the content of cooking. The electromagnetic cooker according to claim 1, wherein 3. A fried food indicator is provided close to the thermal power indicator, and the control circuit is configured to turn on the thermal power indicator and the fried food indicator at the same time when fried food cooking is selected. The electromagnetic cooker according to claim 1 or 2. 4. The control circuit is configured to drive the thermal power indicator and the heating status indicator and the fried food indicator to blink at the same time when the pan detection means detects that there is no pan or the like when cooking the fried food. The electromagnetic cooker according to claim 3, wherein