JP3293210B2 - Induction heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker having a communication function.

[0002]

2. Description of the Related Art In recent years, induction heating cookers have been recognized for their excellent features of safety, cleanliness, and high efficiency, and have been widely used in ordinary households. The induction heating cooker has a structure in which a load pan magnetically coupled with the heating coil is induction-heated by applying a high-frequency current of several tens KHz to a heating coil spread in a spiral planar shape. The high-frequency current is generated in the induction heating section.

A conventional induction heating cooker will be described below with reference to FIGS. 12, 13 and 14. FIG. FIG.
FIG. 2 is a circuit diagram of a conventional induction heating cooker. In FIG. 12, 1 is an AC power supply, 2 is a power switch, and 3 is an induction heating unit, which is composed of a rectifier 30, a heating coil 31, a switching means 32, and an inverter circuit 33. A control unit 4 includes an induction heating unit control unit 40, a modulation unit 42, and a demodulation unit 43. Reference numeral 5 denotes an input unit 5
0, mode control means 51, modulation means 52, demodulation means 53
It is composed of 54 is a display means, 6 is a temperature sensing element,
7 is a load pan.

The temperature sensing element 6 is adhered to the center of the top plate from the inside of the appliance, outputs a resistance value corresponding to the temperature of the object to be cooked in the load pan 7, and inputs the resistance value to the induction heating section. The control means 40 measures the temperature value.

[0005] In the induction heating section 3, the switching means 32
Is turned on and off at several tens of KHz, a high-frequency current is applied to the heating coil 31, and the load pan 7 is induction-heated. Then, the induction heating unit control means 40 changes the on-time of the switching means 32 so that the induction heating section 3
Is controlling the output. Also, the induction heating section control means 40
Is the abnormal high temperature of the switching means 32, the inverter circuit 3
When the abnormality of the induction heating unit 3 is detected, the disconnection of the temperature sensing element 6 or the abnormality of the temperature of the object to be cooked is detected.

In the operation unit 5, the mode control means 51 changes and maintains the settings such as the cooking mode, the setting output or the setting temperature, changes the setting by a signal from the input means 50, and controls the display means 54. Then, the setting or the indication of the abnormality of the induction heating unit 3 or the like is displayed.

The control unit 4 and the operation unit 5 include modulation means 42 and 52 and demodulation means 43 and 53, respectively.
The modulating means 42 and 52 convert the input signal into a digital signal of a predetermined digit and output serially, and this signal is received by the demodulating means 43 or 53 and reconverted into the original signal. Then, the settings such as the cooking mode, the set output, and the set temperature in the mode control unit 51 are transmitted to the induction heating unit control unit 40 through the modulation unit 52 and the demodulation unit 43, and the induction heating unit 3 detected by the induction heating unit control unit 40 is used. And the like are transmitted to the mode control means 51 through the modulation means 42 and the demodulation means 53.

FIG. 13 is an external view of a conventional induction heating cooker. Normally, in a stationary induction heating cooker, the top plate 8 is the upper surface of the device, and the input means 50 is disposed on the side facing the user of the device. Then, the display means 54 displays the top plate 8 as shown in FIG.
13 or the input means 50 as shown in FIG.
Are arranged in the vicinity. The vicinity of the top plate 8 is a position that is easy to see when cooking is being performed.
The vicinity is a position that is easy to see when operating the input means 50 to change the cooking mode, the set output, the set temperature, and the like.

FIG. 14 is an external view of the display means 54. Usually, the display means 54 is a light emitting diode (LED for short),
It is configured using a liquid crystal display element (LCD for short), etc.
The display means 54 having the conventional configuration is configured using LEDs. As shown in FIG. 14, the display means 54 is provided with seven LEDs, LED1 to LED7, for indicating the set outputs of the seven types of induction heating units 3 or the target temperatures of the seven types of foods 9 to be cooked. Further, the output stop state of the induction heating unit 3 (hereinafter referred to as an initial mode), the output constant state of the induction heating unit 3 (hereinafter referred to as a heating mode), the automatic temperature adjustment state of the food 9 (hereinafter referred to as a temperature control mode). LED8 (heating LED) and LED9 to display and separate the three cooking modes
(Temperature control LED) are provided.

FIGS. 15, 16, 17, and 1 show the conventional induction heating cooker constructed as described above.
8, the operation will be described. First, a person who uses the device using the input unit 50 enters the temperature control mode (set temperature 180).
° C). In response to this input, the mode control means 51 changes the setting to the temperature control mode,
° C, and the changed setting is transmitted to the induction heating section control means 40 through the modulation means 52 of the operation section 5 and the demodulation means 43 of the control section 4. FIG. 15 shows the temperature control mode (set temperature 1).
It is a display example at the time of (80 ° C.). In the temperature control mode 180 ° C. setting, the LED 9 indicating the temperature control mode is turned on to indicate that the temperature of the food 9 has not reached the set temperature, and the output / temperature LED blinks the LED 5 indicating the 180 ° C. setting, L
The LED 4 is turned on from the ED 1 and the remaining LEDs 6 to 8 are turned off.

If the induction heating section control means 40 indirectly detects an excessive temperature rise of the article 9 to be cooked by the temperature sensing element 6, the excessive temperature rise of the article 9 to be cooked is modulated by the modulation means 42 of the control section 4 and the operating section 5. Is transmitted to the mode control means 51 through the demodulation means 53. Then, the mode control means 51 uses the display means 54 to display the overheating of the article 9 to be cooked, and the input means 50
Prohibits the setting change to the unsafe operation mode due to. FIG.
6 is a display example of the overheated state of the article 9 to be cooked in the temperature control mode (set temperature 180 ° C.). L indicating temperature control mode
While the ED 9 is kept lit, the display as shown in FIGS.
The number of lights D is shown to be reduced, and the display of the abnormal state is emphasized.

As described above, the mode control means 51 operates as shown in FIG.
When the induction heating unit 3 and the like are not abnormal as shown in the above, the setting input using the input means 50 is displayed on the display means 54,
When the abnormality occurs, the abnormal state is displayed on the display means 54, and the setting change by the input means 50 is prohibited. As shown in FIG. 18, the induction heating unit control means 40 has the latest input signal from the demodulation means 43 of the control unit 4 as a holding signal. The holding signal is updated in accordance with the input signal from the demodulation means 43 while controlling the switching means 32 based on the signal. However, if the induction heating unit 3 or the like is abnormal, the switching means 32 is turned off regardless of the holding signal. In this state, the output of the induction heating unit 3 is stopped, and when the abnormal state is eliminated, the holding signal is initialized to an initial mode signal and a signal from the operation unit 5 is waited.

[0013]

However, in the above-mentioned conventional configuration, since the top plate 8 and the input means 50 are installed at positions separated from each other, when the display means 54 is arranged near the top plate 8, the input means 50 is not provided. In order to confirm that the setting change of the cooking mode, the setting output, and the setting temperature has been performed surely, the user has to shift his / her line of sight one by one, resulting in poor operability. Also, the input means 50
Similarly, when the display means 54 is disposed in the vicinity,
It is also troublesome to check the current setting or the abnormal state on the display means 54 when cooking is performed and the line of sight is on the load pan 7.

Further, since there is no display means controlled by the induction heating section control means 40, it is not possible to directly know the setting of the cooking mode, the set output and the set temperature in the induction heating section control means 40, and the modulation means 52 It is not easy to confirm whether the setting has been correctly transmitted through the demodulation means 43.

Further, when displaying an abnormal state, FIG.
In the case where the set output and the set temperature cannot be displayed as shown in (1), the setting before the occurrence of the abnormal state cannot be known, and the setting change by the input means 50 must be prohibited and the operability is good. There is a problem that there is no.

The present invention solves the above-mentioned conventional problems. When the display contents are changed by changing the setting by the input means or the occurrence of an abnormality in the induction heating section, the display contents of the two display means are simultaneously switched. A first object is to eliminate discomfort caused by instantaneous discrepancies in display contents between the two display means.

Further, when an abnormality occurs in the induction heating section or the like, the setting of the cooking mode, the set output, the set temperature, etc. can be displayed in addition to the display of the abnormal state so that the setting can be changed by the input means. As a second object.

Further, it is a third object of the present invention to complete the processing when an abnormality occurs in the induction heating section or the like by the control section and to eliminate the modulation means of the control section and the demodulation means of the operation section to simplify the configuration of the equipment. The purpose of.

[0019]

In order to achieve the first object, an induction heating cooker according to the present invention comprises an induction heating section including a heating coil and switching means, and an induction heating section for controlling the induction heating section. control means and modulation means for communicating a control unit including a demodulation means, the mode control means and the controlling various settings such as the cooking mode output setting input means
The control and modulation means for transmitting a signal to the demodulation hand stage of the control unit
An operation unit including a demodulation unit that receives a signal from a modulation unit of the unit , a first display unit that performs display based on an input signal from the operation unit, and performs a display based on an input signal from the control unit A second display unit, wherein the control unit and the operation unit each have a display synchronization unit, and the display synchronization unit of the control unit is a signal output timing of the modulation unit of the control unit to the operation unit or the control unit. The display content output by the induction heating section control means is output to the second display means in association with the signal input timing of the demodulation means of the operation section from the operation section, and the display synchronization means of the operation section is provided by the modulation means of the operation section The display content output by the mode control means in association with the signal output timing to the control means or the signal input timing from the control section of the demodulation means of the operation section to the first display means. The first and second display means are configured to output and match the display change timings of the first display means and the second display means, or to provide a predetermined time difference between the display change timings. And

Furthermore, in order to achieve the second object, pressing
An induction heating unit including a heat coil and switching means,
Induction heating unit control means for controlling the induction heating unit and communication
A control unit including a modulating unit and a demodulating unit, and an input unit and a modulation unit.
Mode control to control various settings such as control mode and output setting
Means and modulation for transmitting a signal to the demodulation means of said control unit
Means and a demodulating means for receiving a signal from the modulating means of the control unit.
An operation unit including a step, based on an input signal from the operation unit;
Display means for performing display by means of an input from the control unit
A second display means for performing display based on a signal,
The induction heating section control means controls the induction heating section or communication or the like.
Detecting a state, and outputting a signal to the second display means in accordance with the detection result, wherein the mode control means detects a state of the induction heating unit or the like based on an input signal from the demodulation means of the operation unit; And controlling the modulation unit of the operation unit according to the detection result, and changing an output signal to the first display unit according to an input signal from the input unit. This is the second means for solving the problem.

Further, in order to achieve a third object, an induction heating section including a heating coil and switching means, an induction heating section control means for controlling the induction heating section, and a control section including demodulation means for performing communication. , Input means and cooking mode
Mode control means for controlling various settings such as output settings;
An operation unit including a modulation unit for transmitting a signal to the demodulation unit of the control unit; a first display unit for performing display based on an input signal from the operation unit; and a display unit based on an input signal from the control unit A second display means for performing the following, wherein the induction heating section control means is configured to hold the latest input signal from the demodulation means of the control section regardless of whether or not the induction heating section has an abnormality. 3 means for solving the problem.

[0022]

According to the first aspect of the present invention, there are provided first display means for performing display based on an input signal from an operation unit and second display means for performing display based on an input signal from a control unit. In addition, since the control unit and the operation unit have a communication function, the display such as the cooking mode, the output setting, or the abnormal mode can be simultaneously performed in different places. Further, when the first display means is arranged near the operation unit and the second display means is arranged near the control unit, the wiring to each display means can be shortened. further,
For example, when the second display means is arranged near the top plate and the first display means is arranged near the input means, the wiring to each display means can be shortened as described above, and When operating and cooking, setting or checking of an abnormal state can be easily performed by looking at the second display means located near the top plate. When operating the input means, the first display means located near the input means can be used. By looking at the display means, it is possible to easily confirm that the setting has been changed without changing the viewpoint or the line of sight each time. Also, the first
Display means is controlled by a signal from the operation unit, and the second display means is controlled by a signal from the control unit.
By comparing the display contents of the two display means, the setting of the heating mode, setting output, temperature, etc. is correctly transmitted from the operation unit to the control unit via communication, and the abnormality of the induction heating unit or the like is transmitted from the control unit to the operation unit. It is possible to determine whether or not the device is operating normally by confirming that the information is correctly transmitted to the device.

Also, since the display timings of the first display means and the second display means are matched or a predetermined time difference is provided between the display change timings, the first display means and the second display means blink. Timing can be synchronized or both can be blinked with a predetermined time delay.

For example, the display synchronization means has a function of holding a display signal output from the induction heating section control means or the mode control means, and immediately after the completion of the signal transmission of the modulation means or the completion of the signal reception of the demodulation means. Is output from the modulating means or demodulating means to output the held display signal to the first display means or the second display means so as to change the display content. The display content of the destination and the display of the transmission destination can be switched at the same time, and the display switching timing of the display of the transmission destination is delayed by the communication time when the setting is changed by the input unit or the abnormal state of the induction heating unit occurs. Can be prevented, and discomfort due to an instantaneous discrepancy between the display contents of the two display means can be eliminated.

Further, according to the second problem solving means, the induction heating section control means detects the state of the induction heating section and the like, and outputs a signal to the second display means according to the detection result.
If an abnormality has occurred in the induction heating section or the like, the user can be notified by displaying the fact on the second display means.
The mode control means detects an abnormality of the induction heating unit or the like based on an input signal from the demodulation means of the operation unit, and stops the output to the modulation means of the operation unit or controls the modulation means of the operation unit according to the detection result. Since the transmission operation is controlled to be stopped, the setting of the induction heating unit control unit is maintained, and the abnormality display of the second display unit is continuously displayed unless the abnormal state of the induction heating unit or the like is released. . On the other hand, the mode control means can change the output signal to the first display means according to the input signal from the input means even when the abnormality of the induction heating section or the like is detected based on the input signal from the demodulation means of the operation section. Therefore, if the abnormal state of the induction heating unit or the like is continuing, the second display means displays a certain abnormality and the first display means changes the display content according to the setting input by the input means. However, if the abnormal state disappears, the mode control means performs a normal operation and the modulating means of the operation section transmits the latest setting state set by the operation section, so that the induction heating section is in the latest setting state. The heating operation can be restarted.

Further, according to the third problem solving means, the induction heating section control means holds the latest input signal from the demodulation means of the control section irrespective of the presence or absence of abnormality of the induction heating section or the like. When in the heating operation state, the induction heating unit and the second display unit are controlled based on the latest input signal. When the abnormality is detected, the induction heating unit and the second display unit are controlled according to the content of the abnormality. Since the control and the process at the time of the abnormality are completed in the control unit, the operation unit can output a signal corresponding to the changed setting from the modulation unit regardless of the occurrence of the abnormality of the induction heating unit or the like, and the abnormality is detected. After the cancellation, the induction heating section control means can control the induction heating section and the second display means in accordance with the settings received during the abnormality, eliminating the need to transmit an abnormal state from the control section to the operation section. Different It is possible to simplify the structure of the apparatus by omitting the demodulation means of the modulation means and the operation unit of the control unit for transmitting the state. In addition, since it is not necessary to transmit an abnormal state from the control unit to the operation unit, and the mode control unit does not need to perform a process at the time of abnormality of the induction heating unit or the like, the configuration of the mode control unit can be simplified. .

[0027]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram of an induction heating cooker according to a first embodiment of the present invention. In the present embodiment, components having the same functions as those of the conventional example shown in FIG. The characteristic configuration of the present embodiment is that the function of controlling the second display means 44 is added to the induction heating section control means 40 of FIG. 5 is that the display means 54 controlled by the mode control means 51 is the first display means 54.

FIG. 2A is an external view of the induction heating cooker according to the first embodiment of the present invention. FIG.
As shown in (a), the first display means 54 is connected to the input means 5.
0, and the second display means 44 is arranged near the top plate 8. FIG. 2B is an external view of the second display unit 44. Although the second display means 44 does not need to have the same specifications as the first display means 54,
It is easier to understand that the display of the display means 54 and the display of the second display means 44 correspond to each other. Therefore, in the present embodiment, LEDs 11 to 17 for displaying the set output or the set temperature, LEDs 18 for displaying the heating mode, and LE for displaying the temperature control mode corresponding to each LED of the first display means 54.
D19 is provided.

The operation of the induction heating cooker configured as described above will be described with reference to FIGS.
As shown in FIG. 3, demodulation means 4 is provided to induction heating section control means 41.
A process of outputting to the second display means 44 a signal corresponding to a holding signal holding the latest input signal from the third or a signal corresponding to an abnormal state of the induction heating unit 3 or the like is added. Now, the operation of the first display means 54 and the second display means 44 will be described. First, it is assumed that the user of the appliance turns on the power switch 2 and then selects a temperature control mode in which the input means 50 is used to automatically adjust the output of the induction heating unit 3 according to the temperature state of the article 9 to be cooked. Upon input of a signal from the input means 50, the mode control means 51 changes the setting to the temperature control mode (set temperature of 180 ° C.), and outputs a signal corresponding to this setting to the modulation means 52. Further, the mode control means 51 outputs a signal for displaying the setting of the temperature control mode (set temperature 180 ° C.) to the first display means 54, and as described in FIG. 5
4 indicates the blinking of the LED 5 and the LED 1 as shown in FIG.
4 to 9 are turned on, and the LEDs 6 to 8 are turned off.

In the control section 4, the demodulation means 43 receives and demodulates a signal from the modulation means 52 of the operation section 5 and outputs the signal to the induction heating section control means 41. The induction heating unit control means 41 outputs a predetermined output based on the relationship between the temperature of the cooking object 9 detected by the temperature sensing element 6 and the set temperature according to the setting of the temperature control mode (set temperature 180 ° C.) indicated by the input signal. The temperature of the object to be cooked 9 is adjusted to 180 ° C. by controlling the induction heating unit 3. Then, the induction heating unit control means 41 outputs a signal for performing a display corresponding to the input signal to the second display means 44,
In response to this signal, the second display means 44 blinks the LED 15 and switches the LEDs 11 to 14 and 1 as shown in FIG.
9 is turned on, and the LEDs 16 to 18 are turned off.

Similarly, when an abnormality occurs in the induction heating unit 3 or the like, the second operation is performed according to the output signal of the induction heating unit control means 41.
Display means 44 displays an abnormal state, and the abnormal state is transmitted from the modulating means 42 of the control unit 4 to the mode control means 51 via the demodulating means 53 of the operation unit 5 and the first display means 54 also displays the abnormal state. The status is displayed.

Therefore, when the input means 50 is operated, the device is viewed from the front of the input means 50 as shown in FIG. It is easy to confirm the change or the occurrence of an abnormal state. In addition, when cooking such as putting the object 9 into the load pan 7 is performed, as shown in FIG.
4, the current setting or abnormal state can be easily confirmed.

The first display means 54 performs a display based on the setting in the mode control means 51 or a signal indicating an abnormal state input from the demodulation means 53, and the second display means 44 controls the induction heating section. Since the display based on the setting in the unit 41 or the signal indicating the abnormal state input from the demodulation unit 43 or the induction heating unit 3 is performed, the first display unit 5
By comparing the display contents of the fourth display means 44 and the second display means 44, it can be easily determined whether or not there is an abnormality in the communication. If there is an abnormality in the communication, the output of the induction heating unit 3 is stopped. Can be encouraged.

With the above arrangement, the display means is arranged both in the vicinity of the top plate 8 and in the vicinity of the input means 50. Located in the second
When the input means 50 is operated, the input means 50 can be easily set or the abnormal state can be easily checked by looking at the display means 44.
By looking at the first display means 54 in the vicinity, it can be easily confirmed that the setting change has been reliably performed without shifting the viewpoint. In addition, since the induction heating unit control means 41 or the mode control means 51 controls the display means one by one, the setting of the heating mode, setting output / temperature, etc. can be performed through communication by comparing the display contents of the two display means. That it is correctly transmitted from the operation unit 5 to the control unit 4 and that the induction heating unit 3
It is possible to determine whether or not the device is operating normally by confirming that the abnormality such as is transmitted from the control unit 4 to the operation unit 5 correctly.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a circuit diagram of an induction heating cooker according to a second embodiment of the present invention. The difference from the first embodiment is that the control section 4 and the operation section 5 hold the display signal output from the induction heating section control means 41 or the mode control means 51 and modulate means 42 or 52 or demodulation means 43 or A display synchronizing means 45 or 55 for outputting the display signal to the first display means 54 or the second display means 44 in accordance with the input signal from 53 is added. After a predetermined time, a display synchronization signal for synchronizing the change of the display contents of the two display means is output to the display synchronization means 45 or 55, and the demodulation means 43 or 53 is output.
Is that the display synchronization signal is output to the display synchronization means 45 or 55 immediately after the signal reception is completed or after a predetermined time has elapsed.

In the first embodiment, the input means 50
When the cooking mode is changed from the initial mode to the temperature control mode by using, the content displayed on the first display means 54 changes immediately after the setting change. Therefore, as described in FIG. 4A, when the temperature of the food 9 has not reached the set temperature, the LED 5 indicating the 180 ° C. setting starts blinking. But,
Until the setting change is input to the induction heating unit control unit 41 of the control unit 4, communication in which the modulation unit 52 modulates a digital signal, transmits the digital signal to the demodulation unit 43, and demodulates the received signal by the demodulation unit 43. Time is needed. Therefore, the communication time is delayed between the time when the first display means 54 changes the display contents and the time when the second display means 44 changes the display contents accordingly. However, there has been a problem in that the two display means are different from each other, giving a feeling of discomfort to those using the device.

The present invention solves such a problem, and the operation of the induction heating cooker configured as described above will be described with reference to FIG. The display synchronizing unit 55 of the operation unit 5 holds a display signal input from the mode control unit 51 separately from the display signal output to the first display unit 54. In response, the display signal output to the first display means 54 is updated to the display signal input from the mode control means 51. The display synchronizing means 45 of the control unit 4 has the same configuration.

Upon receiving an input signal from the input means 50, the mode control means 51 changes from the initial mode to the temperature control mode (set temperature 1).
The setting is changed to 80 ° C.), and a display signal indicating the changed setting is output to the display synchronizing means 55. However, the display synchronizing means 55 merely stores the display signal in the memory, and at this time, outputs a display signal indicating the initial mode which is the setting before the change to the first display means 54 and outputs the signal to the first display means 54 as shown in FIG. Are turned off (of course, the LED 5 is also turned off). Then, the modulation means 52 of the operation unit 5 starts signal transmission, and the demodulation means 43 of the control unit 4 receives and transmits this signal.
The signal is demodulated and output to the induction heating section control means 41. This signal is input, and the induction heating section control means 41 changes the setting to the temperature control mode (set temperature 180 ° C.) and synchronizes the display signal corresponding to this setting with the display synchronization. Output to means 45. At this time, the demodulation unit 43 outputs a display synchronization signal to the display synchronization unit 45 for outputting the new display signal to the second display unit 44 after the display synchronization unit 45 completes storing the new display signal in the memory. Further, the modulation means 52 of the operation unit 5 outputs the display synchronization signal to the display synchronization means 55 at the same timing as the demodulation means 43 of the control unit 4. Then, the display synchronization signal is input, and the display synchronization means 45 and 55 are switched to the second display means 44.
Alternatively, a signal holding an output signal to the first display means 54 in a memory, that is, a temperature control mode (set temperature 180
Update the display signal corresponding to (° C). In this way,
The change timings of the display contents of the first display means 54 and the second display means 44 are matched.

Similarly, when an abnormality occurs in the induction heating unit 3 or the like, the display of the abnormal state is simultaneously switched on the first display means 54 and the second display means 44.

With the above configuration, the display synchronizing signal is output from the modulating means 42 or 52 and the demodulating means 43 or 53 at the same timing, and the display synchronizing signal is input. Since the change is performed, the display content of the display unit of the transmission source is switched at the same time as that of the display unit of the transmission destination, and when the setting is changed by the input unit 50 or an abnormal state of the induction heating unit 3 occurs, the display unit of the transmission destination is displayed. By preventing the display switching timing from being delayed by the communication time, it is possible to eliminate discomfort caused by an instantaneous discrepancy between the display contents of the two display means.

Embodiment 3 Hereinafter, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a circuit diagram of an induction heating cooker according to a third embodiment of the present invention. The difference from the first embodiment is that when the mode control unit 56 detects an abnormality of the induction heating unit 3 or the like based on the input signal from the demodulation unit 53 of the operation unit 5, the setting change for the modulation unit 52 of the operation unit 5 is performed. Is stopped, but the first display means 54 controls the display so as to display various settings such as the cooking mode and the output setting, and the setting and the first setting in accordance with the input signal from the input means 50. The output signal to the display means 54 is changed,
In addition, a signal corresponding to the setting is output to the modulating means 52 of the operation unit 5 when the abnormality is eliminated.

In the first embodiment, for example, when the temperature rise of the object 9 is detected by the temperature sensing element 6, the LEDs 1 to 7 for displaying the set output or the set temperature as shown in FIG. Therefore, the set output or the display of the set temperature cannot be performed until the excessive rise in the temperature of the article to be cooked 9 is eliminated. Therefore, when the temperature of the object 9 to be cooked rises excessively, not only is there no way to know the set output or the set temperature until that time, but also the set output or the set temperature is changed by the input means 50. There was a problem that the setting change by the input means 50 had to be prohibited because it could not be displayed.

This embodiment solves such a problem. The operation of the induction heating cooker configured as described above will be described with reference to FIG. FIG. 8 is a flowchart for explaining the operation of the mode control means 56. The mode control means 56 turns on the power switch 2 and turns on the memory when the AC power supply 1 is turned on.
Is initialized to the initial mode indicating the output stop state. Thereafter, the process branches into two processing modes: a case where an abnormal signal is input from the demodulation means 53 of the operation unit 5 and a case where it is not.

First, consider a case where the mode control means 56 has not yet input an abnormal signal from the demodulation means 53 of the operation unit 5. In this case, when a signal indicating a new setting is input from the input means 50, the mode control means 56 updates the setting to the new setting and outputs a signal corresponding to the new setting to the modulation means 52. Then, the modulating means 52 of the operation unit 5 modulates and transmits the input signal, and the demodulating means 4 of the control unit 4.
3 receives and demodulates the signal and outputs it to the induction heating section control means 41, and the induction heating section control means 41 performs control according to the new setting based on the output signal. Note that this mode processing is hereinafter referred to as normal mode processing.

Next, it is assumed that the mode control means 56 inputs a signal indicating an abnormality of the induction heating unit 3 or the like from the demodulation means 53 of the operation unit 5. In this case, the mode control means 56 updates and retains the setting by the input signal from the input means 50, but does not output a signal corresponding to the latest setting to the modulation means 52 of the operation unit 5. This is because the control unit 4 does not have a function of holding the latest input signal from the operation unit 5 in the present embodiment, so that the demodulation unit 43 inputs a signal when performing a process in an abnormal state. Also, the induction heating section control means 41 cannot interrupt the abnormal processing and cannot change to the processing corresponding to this signal, so the input signal has to be discarded. This is because even if the signal to the modulating unit 52 becomes meaningless and the abnormal state is eliminated, the induction heating unit control unit 41 cannot perform control according to the setting received during the abnormal state. Therefore, in this embodiment, the abnormality is eliminated and the operation unit 5
Control according to the signal received from the induction heating unit control means 4
After the operation 1 can be performed, the latest setting held during the abnormality held by the mode control unit 56 is transmitted to the control unit 4 via the modulation unit 52, so that the induction heating unit control unit 41 Can perform control according to the latest setting immediately after the elimination of the abnormality. The mode processing performed by the mode control means 56 is hereinafter referred to as abnormal mode processing. This abnormal mode processing is repeated until the mode control means 56 detects that the abnormality has been eliminated by the input signal from the demodulation means 53 of the operation unit 5.

When the abnormality is eliminated, the induction heating section control means 41 outputs the fact to the modulation means 42 of the control section 4 and waits for the input of a new signal from the operation section 5. Control unit 4
The signal output from the modulation means 42 is output to the mode control means 56 after being received and demodulated by the demodulation means 53 of the operation unit 5, and upon receiving this signal, the mode control means 56 detects that the abnormality has been eliminated. A signal corresponding to the setting held is output to the modulating means 52 of the operation unit 5, and the process returns to the normal mode processing. The signal output from the mode control means 56 is modulated and transmitted by the modulation means 52, and is demodulated by the demodulation means 4 of the control unit 4.
3 to receive and demodulate and output to the induction heating section control means 41,
According to this input signal, the induction heating section control means 41 can control the induction heating section 3 according to the latest setting of the operation section 5.

With the above-described configuration, when an abnormality occurs in the induction heating unit 3 or the like, an abnormal state can be displayed by the second display means 44, and the cooking mode, the set output / set temperature, etc. Can be displayed by the first display means 54, so that even if the abnormality occurs, the settings can be known by the first display means 54, and the setting can be changed by the input means 50. At the same time, the result of the setting change can be confirmed on the first display means 54, and when the abnormality is eliminated, the device can be automatically operated according to the latest setting made during the abnormality.

Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9 shows a circuit diagram of an induction heating cooker according to a fourth embodiment of the present invention. The difference from the first embodiment is that the mode control means 57 is
Omission of processing at the time of an abnormality such as, the induction heating section control means 46 has a function of holding the latest input signal from the demodulation means 43 of the control section 4 regardless of the presence or absence of an abnormality of the induction heating section 3 etc. When the abnormality has not occurred, the induction heating unit 3 and the second display means 44 are controlled based on the latest input signal. When the abnormality has occurred, the induction heating unit 3 is controlled in accordance with the content of the abnormality. 3 and the second display means 44 are controlled so that the processing at the time of the abnormality is completed in the control unit 4, and the modulation means 42 of the control unit 4 and the demodulation means 53 of the operation unit 5 in FIG. That is.

In the first embodiment, the induction heating unit 3
When an abnormality such as an abnormality is detected, an abnormality is displayed on both the first display means 54 and the second display means 44, so that the setting of the cooking mode, the set output and the set temperature cannot be displayed. Therefore, there is a problem that the setting change by the input means 50 must be prohibited.

This embodiment solves such a problem and simplifies the communication configuration. The operation of the induction heating cooker configured as described above will be described with reference to FIGS. 10 and 11. . FIG. 10 shows the mode control means 57.
5 is a flowchart for explaining the operation of FIG. Since the operation unit 5 does not receive a signal from the control unit 4, the mode control unit 57 changes the setting according to the input signal from the input unit 50, and outputs a signal corresponding to the changed setting to the modulation unit 52, It is a simple configuration that only controls the first display means 54 to perform display according to the setting.

FIG. 11 is a flow chart for explaining the operation of the induction heating section control means 46. When the AC power supply 1 is turned on with the power switch 2 turned on, the induction heating section control means 46 initializes the memory to an initial mode corresponding to the output stop state of the induction heating section 3. Then, when a new signal is input from the demodulation unit 43 of the control unit 4 irrespective of the presence or absence of the abnormal state, the induction heating unit control unit 46 updates the memory with the new input signal and stores it. When the induction heating unit 3 and the like are normal, the induction heating unit 3 is controlled based on the signal stored in the memory to display a display signal corresponding to the signal stored in the memory to the second display means 44. Output to When the induction heating unit 3 or the like is in an abnormal state, the switching unit 32 is turned off to stop the output of the induction heating unit 3, and a display signal corresponding to the abnormality is output to the second display unit 44.

However, even during the abnormality, the mode control means 57
The setting display of the cooking mode, the set output and the set temperature is performed on the first display means 54, and the setting can be changed by the input means 50. When the setting is changed, the modulation unit 52 of the operation unit 5
Since the signal transmitted by the control unit 4 is received and demodulated by the modulation unit 43 of the control unit 4 even when the induction heating unit 3 or the like is in an abnormal state, the signal is held by the induction heating unit control unit 46. The modulating means 52 can transmit a signal regardless of the presence or absence of the abnormality. When the abnormality is eliminated, the induction heating section control means 46 controls the induction heating section 3 and the second display means 44 based on the signal held therein. The device can be operated with the settings input from the input means 50 at the same time.

With the above configuration, the processing when an abnormality occurs in the induction heating section 3 or the like is completed by the control section 4, and the modulation section 42 of the control section 4 and the demodulation section 53 of the operation section 5 are removed. The configuration of the device can be simplified.

In the conventional example and the first to fourth embodiments, the modulating means 42 and 52 or the demodulating means 43 and 53 are configured to perform wired serial communication. However, the same applies to other communication methods such as wireless communication. The effect of can be obtained. Also, it is clear that some or all of the components of the control unit 4 and some or all of the components of the operation unit 5 can be performed by a microcomputer.

[0056]

As described above, according to the first aspect of the present invention,
Ri, check the output setting or abnormal state of the induction heating cooker in different places easily performed, also the length of the connecting wires to the first or the second display means can be shortened, two further display By comparing the means, it is possible to determine whether the device is operating normally by confirming that the setting is correctly transmitted from the operation unit to the control unit or that the abnormal state is correctly transmitted from the control unit to the operation unit.

[0057] Also, at the same time switches the display contents of the two display means to change the display content by the abnormal occurrence of a setting change or the induction heating unit according to the input means, the instantaneous discrepancies display contents on two display means 2 when the discomfort caused by the
By intentionally providing a predetermined time difference between the display contents of the two display means, it is possible to strongly warn the user of the abnormal state.

According to the second aspect of the present invention, when an abnormality occurs in the induction heating section or the like, an abnormal state can be displayed, and settings such as a cooking mode, a set output and a set temperature can be displayed. Since the setting can be changed by the input means, the operability can be improved.

Further, according to the third aspect of the invention, it is possible to change the setting by the input means even when an abnormality occurs in the induction heating section or the like, and automatically start the heating operation with the setting when the abnormality is eliminated. As a result, the operability can be improved, and the modulation means of the control unit and the demodulation means of the operation unit can be omitted, so that the configuration of the device can be simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram of an induction heating cooker according to a first embodiment of the present invention.

FIG. 2A is an external view of the induction heating cooker. FIG. 2B is an external view of the second display means.

FIG. 3 is a flowchart for explaining the operation of the induction heating section control means.

FIG. 4A shows a display of a temperature control mode (set temperature of 180 ° C.) on the first display means. FIG. 4B shows a display of a temperature control mode (set temperature of 180 ° C.) on the second display means. Diagram shown

FIG. 5 is a block diagram of an induction heating cooker according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram of the operation of the display synchronization means.

FIG. 7 is a block diagram of an induction heating cooker according to a third embodiment of the present invention.

FIG. 8 is a flowchart for explaining the operation of the mode control means.

FIG. 9 is a block diagram of an induction heating cooker according to a fourth embodiment of the present invention.

FIG. 10 is a flowchart for explaining the operation of the mode control means.

FIG. 11 is a flowchart for explaining the operation of the induction heating section control means;

FIG. 12 is a block diagram of a conventional induction heating cooker.

13A is an external view of an induction heating cooker in a conventional example. FIG. 13B is an external view of an induction heating cooker in another conventional example.

FIG. 14 is an external view of a display means in a conventional example.

FIG. 15 is a diagram showing a display of the same temperature control mode (a set temperature of 180 ° C.).

FIG. 16 is a diagram showing a display of an excessive rise in the temperature of the object to be cooked in the temperature control mode.

FIG. 17 is a flowchart illustrating the operation of the mode control means.

FIG. 18 is a flowchart for explaining the operation of the induction heating section control means;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC power supply 2 Power switch 3 Induction heating part 4 Control part 5 Operation part 6 Thermosensitive element 7 Load pan 8 Top plate 9 Cooking object 30 Rectifier 31 Heating coil 32 Switching means 33 Inverter circuit 41 Induction heating part control means 42 Modulation means 43 demodulation means 44 second display means 50 input means 51 mode control means 52 modulation means 53 demodulation means 54 first display means

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuji Fujii 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-162130 (JP, A) JP-A-2-2 12790 (JP, A) JP-A-61-99033 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 6/12

Claims (3)

(57) [Claims] 1. An induction heating unit including a heating coil and a switching unit, an induction heating unit control unit for controlling the induction heating unit, a control unit including a modulation unit and a demodulation unit for performing communication, an input unit and a cooking mode. An operation unit including a mode control unit that controls various settings such as an output setting and a demodulation unit that transmits a signal to a demodulation unit of the control unit and a demodulation unit that receives a signal from the modulation unit of the control unit; First display means for performing display based on the input signal of the first, and second display means for performing display based on the input signal from the control unit, the control unit and the operation unit are each a display synchronization means The display synchronization means of the control unit is associated with a signal output timing of the modulation means of the control unit to the operation unit or a signal input timing of the demodulation means of the control unit from the operation unit. The display content output by the induction heating section control means is output to the second display means, and the display synchronization means of the operation section outputs a signal output timing of the modulation means of the operation section to the control means or demodulates the operation section. Outputting the display content output by the mode control means to the first display means in association with the signal input timing from the control section of the means, and changing the display of the first display means and the second display means An induction heating cooker in which the timings are matched or a predetermined time difference is provided in the display change timing. 2. An induction heating unit including a heating coil and a switching unit, an induction heating unit control unit for controlling the induction heating unit, a control unit including a modulation unit and a demodulation unit for performing communication, an input unit and a cooking mode. Signals are transmitted to the mode control means for controlling various settings such as output setting and the demodulation means of the control section.
Signal from the modulating means for transmitting the signal and the modulating means of the control unit.
An operation unit including a demodulation unit that receives a signal, a first display unit that performs display based on an input signal from the operation unit, and a second display unit that performs display based on an input signal from the control unit. The induction heating section control means detects the state of the induction heating section or communication, and outputs a signal to the second display means according to the detection result, and the mode control means controls the operation of the operation section. Based on the input signal from the demodulation unit, the state of the induction heating unit or the like is detected, and the modulation unit of the operation unit is controlled according to the detection result, and the output signal to the first display unit is output. An induction heating cooker configured to be changeable according to an input signal from the input means. 3. An induction heating unit including a heating coil and a switching unit, an induction heating unit control unit for controlling the induction heating unit, a control unit including a demodulation unit for communication, an input unit, a cooking mode / output setting and the like. Signals to mode control means for controlling various settings of
An operation unit including a modulating unit , a first display unit that performs display based on an input signal from the operation unit, and a second display unit that performs display based on an input signal from the control unit, The induction heating cooker is configured such that the induction heating section control means retains the latest input signal from the demodulation means of the control section regardless of whether the induction heating section or the like is abnormal.