JPH08200708A - Electric cooker - Google Patents

Abstract

PURPOSE: To suppress the consumption current of the electric circuit, and make the parts of a power source circuit smaller to reduce the cost, and at the same time, eliminate the troublesomeness of designing due to a commercial power source frequency. CONSTITUTION: A first display means 7a and second display means 7b for which a plurality of light emitting diode lamps are divided into two groups are alternately lit up and turned off by an alternate display driving means 6 while synchronizing with a timing of the zero-cross of a commercial power source 9, being detected by a detecting means 5, at every timing, for an electric cooker.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an electric cooker.

[0002]

2. Description of the Related Art In recent years, with the spread of integrated circuits represented by microcomputers, electric cookers using these integrated circuits have been produced. Such an electric cooker enables unprecedented, fine-tuned automatic cooking by processing the data from the detection means such as the temperature detection element and the weight sensor. By using elements to directly display the time required for cooking, etc. as numbers, a more convenient electric cooker has been created.

Here, a conventional electric cooker will be described with reference to the drawings. In FIG. 7 (a), reference numeral 2 is a heater for heating the food contained in the electric cooker body 1. The control circuit 3 is composed of a relay or the like, a driving means 4 for turning on / off the power supply to the heater 2, and a commercial power supply 9
And a display control means 10 which receives a signal from the detection means 5 and issues a control signal to the first display means 7a and the second display means 7b. The first display means 7a and the second display means 7b are each provided with a light emitting diode for displaying numbers.

The operation of this conventional example will be described below.
When the user presses the drive starting means 8 composed of a start switch or the like, the main body 1 starts operating. As a result, the driving means 4 controls the energization of the heater 2 on / off. At the same time, the display control means 10 controls the first display means 7a and the second display means 7b at the zero-cross timing of the commercial power source 9 detected by the detection means 4.
Is controlled by the drive signals a and b as shown in FIG. 7 (b), and by the numeral display light emitting diodes provided in the first display means 7a and the second display means 7b, respectively.
Display the time required for cooking. Cooking progresses due to the heat generated by the heater 2, and the cooking time ends as the display time decreases.

Further, the driving method of the first display means 7a and the second display means 7b of the display control means 10 is shown in FIG. 7b.
Will be explained. When the driving start means 8 is pressed and cooking is started, the display control means 10 detects the zero volt detection timing from the detection means 5 and detects the first display means 7.
A drive signal a shown in FIG. 7B is output for driving a, and a drive signal b shown in FIG. 7B is output for driving the second display means 7b. Fig. 7 shows the current consumption at this time.
It is shown in (b). The current consumption during t2 (seconds) is zero. This is to make it appear to be continuously lit by utilizing the afterimage phenomenon of the user's eyes. There are many display elements and the current consumption is suppressed when the current consumption is large and the number of drive circuit parts is reduced. Has an effect on. The average current Im (A) at this time is f (Hz) for the commercial power supply frequency, i1 (A) for the current consumption of the first display means 7a, and i2 (A) for the current consumption of the second display means 7b. ), It becomes (Equation 1).

[0006]

[Equation 1]

According to (Equation 1), it can be seen that the average current Im increases in proportion to the commercial power frequency f.

[0008]

However, in the conventional electric cooker, in order to display a numerical value, a light emitting diode having a large number of elements, such as a numerical display light emitting diode, is driven at a time and turned on. Inevitably, the required power supply current also increases, and the components such as the transformer used in the power supply circuit also need to have a large capacity, resulting in a high cost.

Further, when the time required for cooking is displayed in detail in seconds, the number of light emitting diodes for displaying numbers increases, so that the current consumption further increases and the cost further increases for the reason described above. Had a point.

Therefore, although the method as in the conventional example described above is used, the commercial power supply frequency (50 and 60H) is used.
Since the current consumed by the display means per unit time changes depending on z), there is also a problem in that the control circuit must be designed and evaluated in consideration of both of them when designing the control circuit.

In addition, when a dot such as a decimal point is used to separate the time required for cooking and the hour, minute, and second of the timer time, the dot display element provided in the number display LED is used. Compared to the element that displays the numerical value of the light emitting diode for display, the element for dot display is small, so drive with the same current,
Displaying with the same brightness has a problem that it is difficult for the user to recognize the display by the dot display element.

The present invention solves the problem of such a conventional electric cooker by suppressing the current consumption of the electric circuit, downsizing the parts of the power supply circuit, and reducing the cost. The first object is to eliminate the complexity of design depending on the commercial power frequency. Moreover, while providing the 2nd-6th means for achieving the said 1st objective,
It is a second to sixth object to provide an electric cooker in which the user can easily recognize the time required for cooking.

[0013]

The first means of the present invention for achieving the first object is to provide a heater for heating food, a driving means for controlling the output of the heater, and a driving means for the driving means. It comprises a drive starting means for starting the drive and a plurality of light emitting diodes for display, and the plurality of light emitting diode lamps are divided into two blocks to serve as first and second display means for displaying the operation state, and a commercial power source. The electric cooker is configured to have a detection means for detecting the zero-cross point and an alternate display drive means for alternately turning on and off the display of the first and second display means at each timing detected by the detection means. That is.

Second aspect of the present invention for achieving the second object
The first means and the second means which constitute the first means of the present invention.
The electric cooker is provided with a light emitting diode for displaying numbers on at least one of the display means.

A third means of the present invention for achieving the third object is a heater for heating food, a driving means for controlling the output of the heater, and a driving for starting the driving of the driving means. An electric cooker is provided with a starting means, a light emitting diode lamp for displaying a predetermined numerical value, and a display means having a light emitting diode for displaying a numeral.

A fourth aspect of the present invention for achieving the fourth objective.
The means for displaying the numerical value by means of the light emitting diode lamp of the third means of the present invention is arranged at a constant distance from the display surface and the display surface on which the numerical value to be displayed is shaped by the difference in light transmission. The electric cooker comprises the light emitting diode lamp, and the light emitted from the light emitting diode lamp is emitted from the back surface to display the displayed numerical value on the display surface by a difference in brightness.

Further, a fifth means of the present invention for achieving the fifth object comprises a numerical value display portion and a decimal point display portion in the display means of the third and fourth means of the present invention, and the numerical value display is provided. 5. The electric cooker according to claim 3, wherein the decimal point display section is set to have a higher brightness than that of the section.

A sixth aspect of the present invention for achieving the sixth objective.
The means for heating the cooked food, the driving means for controlling the output of the heater, the driving start means for starting the driving of the driving means, and the first and second light emitting diodes for displaying numbers. A display means, a third display means having a light emitting diode lamp for displaying a predetermined numerical value, a detection means for detecting a zero cross of the commercial power source, and the first display means for each timing detected by the detection means. In the case of displaying, the display of the first display means and the display of the second and third display means are alternately turned on / blinking, and in the case of not displaying the first display means, the display means of the second display means. The electric cooking device is configured to have an alternate display driving unit that alternately turns on and off the display of the third display unit.

[0019]

In the first means of the present invention, in synchronization with the zero-cross timing of the commercial power source detected by the detecting means, the alternate display driving means divides the plurality of light emitting diode lamps into two groups at each timing. By alternately lighting and blinking the first and second display means, it is possible for the user's eyes to recognize that the first and second display means are simultaneously and continuously lighted, and the display is performed. Since the average value of the current consumed by the means can be made constant regardless of the frequency of the commercial power source, the design can be facilitated, the current consumption can be reduced, and the components such as the transformer that constitute the power source circuit can be downsized. Therefore, the cost can be reduced.

In the second means of the present invention, since at least one of the first and second display means is provided with a light emitting diode for displaying a numeral, the user can display a numerical value such as a time required for cooking or the like. Therefore, usability is improved. Further, in synchronization with the timing of the zero cross of the commercial power source detected by the detecting means, the alternate display driving means is set to the first
By alternately lighting and blinking the first and second display means, it is possible for the user's eyes to recognize that the first and second display means are simultaneously and continuously lit, and at the same time, the display means. Since the average value of the current consumed by the can be made constant regardless of the frequency of the commercial power supply, the design can be facilitated, the current consumption can be reduced, and the parts such as the transformer forming the power supply circuit can be downsized. The cost can be reduced.

According to the third means of the present invention, since the display means has the light emitting diode for displaying numbers, it is possible to display numerical values such as the time taken for cooking, thus improving the usability. Also, since it has a light emitting diode lamp that has a meaning of a predetermined numerical value, if the predetermined numerical value is set to a numerical value which is one digit below the numerical value that can be displayed by the numerical value displaying light emitting diode, the numerical expression becomes more detailed. As the usability is improved and the numerical value can be displayed with a single light emitting diode lamp, it is not necessary to use another light emitting diode for numerical value display, the current consumption of the display means can be suppressed, and the component cost of the power supply circuit section can be reduced. Can be reduced.

Further, in the fourth means of the present invention, since the display means has the numeral display light emitting diode, it is possible to display a numerical value such as the time taken for cooking, thereby improving the usability. Also, since it has a light emitting diode lamp that has a meaning of a predetermined numerical value, if the predetermined numerical value is set to a numerical value that is one digit below the numerical value that can be displayed by the numerical value displaying light emitting diode, the numerical expression becomes more detailed. , The set predetermined numerical value is geometrically shaped on the display surface of the display means by the difference in light transmission, and is displayed by irradiating the light of a light-emitting diode lamp arranged at a certain distance from the back surface. By displaying the numerical value by the difference in brightness and darkness, it is possible to make the display easy for the user to understand and further improve the usability. Further, since it is possible to display numerical values with a single light emitting diode lamp, it is not necessary to use another numerical display light emitting diode, the current consumption of the display means can be suppressed, and the component cost of the power supply circuit section can be reduced.

In the fifth means of the present invention, since a predetermined numerical value can be displayed on the numerical value display part and the decimal point display part of the display means, it is possible to display numerical values such as the time required for cooking, thus improving the usability. . In addition, by setting the light emission brightness of the decimal point display unit higher than the light emission brightness of the numerical value display unit, the display of the decimal point display unit is emphasized and displayed which is smaller than the numerical value display unit and difficult for the user to see. Therefore, it has excellent visibility.

Further, in the sixth means of the present invention, the first and second display means are provided with a light emitting diode for displaying a numeral, and the third display means is provided with a light emitting diode lamp for displaying a predetermined numerical value. Therefore, the user can display a numerical value such as the time required for cooking, etc., and the usability is improved. Further, in synchronization with the zero-cross timing of the commercial power source detected by the detection means, when the first display means displays at each timing, the alternate display drive means and the second and third display means. When the first display means does not display by alternately lighting and blinking the display means of, the alternate display drive means operates the second display means at each timing in synchronization with the zero-cross timing of the commercial power source detected by the detection means. By alternately turning on and blinking the display means and the third display means, the average value of the current consumed by the display means can be made constant regardless of the frequency of the commercial power source, which facilitates the design and consumes the current. Can be reduced, and parts such as a transformer forming a power supply circuit can be miniaturized, so that the cost can be reduced.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG. 1 (a), reference numeral 2 is a heater for heating a cooking product, which is built in the electric cooker main body 1. The control circuit 3 receives a signal from the drive starting means 8 such as a start switch and a thermal power setting switch, and a drive means 4 including a relay for turning on / off the energization of the heater 2, and the like.
Upon receiving a signal from the detection means 5 for detecting the zero cross of the commercial power source 9 and the drive start means 8, the first display means 7a and the second display means 7b are synchronized with the timing detected by the detection means 5. The alternate display drive means 6 for outputting the drive signal a and the drive signal b, respectively, is provided. Further, the first display means 7a is provided with a light emitting diode lamp which lights up during cooking to inform that the main body 1 is in operation, and the second display means 7b has a heating power state (strong, medium, weak) of the heater 2. ) Is provided for the three light-emitting diode lamps.

The operation of this embodiment will be described below. When the user selects, for example, "medium" thermal power with the thermal power setting switch of the drive starting means 8 and presses the start switch of the drive starting means 8, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 and controls the output so that the set thermal power is obtained. At the same time, the alternate display drive means 6 is set to the first by the timing of the zero cross of the commercial power source 9 detected by the detection means 4.
The display means 7a and the second display means 7b are alternately turned on and off by the drive signals a and b, and the first display means 7a is provided with a light emitting diode lamp which indicates "during cooking" and the second display means 7b.
In the display means 7b, the light emitting diode lamp showing the thermal power "medium" is driven and displayed. The heating of the heater 2 causes the cooking to proceed, and the cooking ends when the time elapses.

Further, the driving method of the first display means 7a and the second display means 7b of the alternate display drive means 6 is shown in FIG.
This will be described using b. When the driving start means 8 is pushed to start cooking, the alternate display driving means 6 drives the first display means 7a as shown in FIG. 1 (b) according to the detection timing of the commercial power source 9 volt received from the detecting means 5. Signal a,
The drive signal b shown in FIG. 1B is used to drive the second display means 7b.
Are output and displayed. The current consumption at this time is also shown in FIG. Also, the average current Im in this case
In (A), if the commercial power supply frequency is f (Hz), the current consumption of the first display means 7a is i1 (A), and the current consumption of the second display means 7b is i2 (A), (Equation 2) ), So
(Equation 3)

[0029]

[Equation 2]

[0030]

(Equation 3)

According to (Equation 3), it is found that the average current Im is irrelevant to the commercial power supply frequency f, and the difference in the current consumption of the display means due to the difference between the commercial power supply frequency of 50 Hz and 60 Hz is determined by the circuit design. There is no need to consider this when making decisions.
Further, if the current consumed by each is the same as i1 and i2 (A), as compared with the case where the first display means 7a and the second display means 7b are driven at the same time and the display is performed with the lights kept on, Since the current consumed by the whole display means 7 is half,
It is possible to reduce the size and cost of the power supply circuit parts.

In this embodiment, the first display means 7a
Each of the second display means 7b and the second display means 7b is driven by one light-emitting diode lamp, but the function of the main body 1 is improved, and a light-emitting diode lamp is driven by mounting a power lamp, a cooking mode display lamp, or the like. It goes without saying that the same effect can be obtained even if the number of is increased.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 2 (a),
In the present embodiment, the first display means 7a and the second display means 7b of the first embodiment have a numeral display light emitting diode called a 7-segment light emitting diode (hereinafter referred to as a 7-segment LED). . Further, the drive starting means 8 is provided with a cooking time setting switch in addition to the start switch and the heat power setting switch. The rest of the configuration is the same as that of the first embodiment, so the description thereof is omitted.

The operation of this embodiment will be described below. The user selects, for example, "medium" thermal power with the thermal power setting switch of the drive starting means 8, sets the cooking time to "12" with the cooking time setting switch of the drive starting means 8, and starts the drive starting means 8. When the switch is pressed, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 and controls the output so that the set thermal power is obtained. At the same time, the alternate display drive means 6 alternately lights the first display means 7a and the second display means 7b with the drive signals a and b at the zero-cross timing of the commercial power source 9 detected by the detection means 4.・ Control the blinking,
On the first display means 7a, a light-emitting diode lamp indicating "during cooking" and "1" indicating the tenth time of cooking time, and on the second display means 7b, a light-emitting diode lamp indicating "medium" heating power, and cooking "2" indicating the first place of time is driven and displayed. Then, the heating of the heater 2 causes cooking to proceed,
The cooking time is displayed while being reduced by 1 every one minute, and the cooking is finished as time passes.

Here, since the driving method of the first display means 7a and the second display means 7b is the same as that of the first embodiment, its explanation is omitted. Similar to the first embodiment, the first display means 7a and the second display means 7a
The average current consumed by the display means 7b of
Is unrelated to the commercial power supply frequency of 50 Hz and 60
It is no longer necessary to consider the difference in current consumption of the display means due to the difference from Hz when designing the circuit. Further, if the current consumed by each is the same as i1 and i2 (A), as compared with the case where the first display means 7a and the second display means 7b are driven at the same time and the display is performed with the lights kept on, Since the current consumed by the display means may be half, the parts of the power supply circuit section can be downsized and the cost can be reduced.

In this embodiment, the first display means 7a
Although the numerical display light emitting diode is used for each of the second display means 7b and the second display means 7b, the same applies when the numerical display light emitting diode is used for only one of the first display means 7a and the second display means 7b. Needless to say, the effect of can be obtained.

(Embodiment 3) In FIG. 3, reference numeral 2 is a heater for heating a cooking product, which is built in the electric cooker body 1. The control circuit 3 includes a drive unit 4 including a relay for turning on / off the energization of the heater 2 in response to a signal from the drive start unit 8 such as a start switch. When the signal from the drive start unit 8 is received, The drive signal is output to the display means 7. Further, in order to display the numerical value of the cooking time on the display means 7, the light emitting diode 7c for numerical display for 30 minutes (0.
The display is provided with a light emitting diode lamp 7d.

The operation of this embodiment will be described below. Driving start means 8 composed of a start switch for the user
When is pressed, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 to control the output. At the same time, the control circuit 3 causes the display means 7 to operate.
A driving signal is output to the display means 7 and the number display light emitting diode 7c and the light emitting diode lamp 7d included in the display means 7 display the time required for cooking. With this, the user can directly see how long it takes to cook as a numerical value, which is easy to understand. The heating of the heater 2 causes the cooking to proceed, and the cooking ends with the lapse of time. At this time, when the display of the display means 7 starts from "8", the multi-element display light emitting element 7c displays "8",
The light emitting diode lamp 7d is off. After 30 seconds, the multi-element display light emitting element 7c is "7", and the light emitting diode lamp 7d is turned on to indicate that the remaining time is 7 minutes and 30 seconds. That is, the light emitting diode 7c for displaying numbers
Indicates a value obtained by subtracting 1 every 1 minute, and the light emitting diode lamp 7b repeats lighting / blinking every 30 seconds, and when it reaches 0, cooking is terminated. Therefore, if a display such as "30 seconds" or "0.5 minutes" is attached to the display surface near the light emitting diode lamp 7d, the user can easily understand that the timer is in 30 second increments. . In this way, one 1-digit numeric display light-emitting diode and one light-emitting diode lamp can display for 10 minutes or less in 30-second intervals, and the same operation is performed using the 2-digit numeric display light-emitting diode. Since the number of light emitting elements to be driven is small, the current consumption can also be suppressed, so that the parts of the power supply circuit section can be downsized and the cost can be reduced.

In the present embodiment, one light emitting diode for displaying a one-digit number and one light emitting diode lamp display the time of 10 minutes or less at intervals of 30 seconds, but various combinations such as 1 Using one light emitting diode for displaying digits and two light emitting diode lamps, one of the light emitting diode lamps is replaced with the tens digit "1" as in the present embodiment.
On the other hand, if "30 seconds" is displayed and the one digit digit display LED is used to display the ones digit,
It goes without saying that a display of 20 minutes or less can be performed in seconds.

(Embodiment 4) In FIG. 4, a part of the display surface of the display means 7 is black-painted except for the part of ".5" shaped on the transparent film. Further, the light emitting diode lamp 7d is arranged at a constant distance substantially behind ".5". The rest of the configuration is the same as that of the third embodiment, and the description thereof is omitted.

The operation of this embodiment will be described below. Driving start means 8 composed of a start switch for the user
When is pressed, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 to control the output. At the same time, the control circuit 3 causes the display means 7 to operate.
A driving signal is output to the display means 7 and the number display light emitting diode 7c and the light emitting diode lamp 7d included in the display means 7 display the time required for cooking. With this, the user can directly see how long it takes to cook as a numerical value, which is easy to understand. The heating of the heater 2 causes the cooking to proceed, and the cooking ends with the lapse of time. At this time, when the display of the display means 7 starts from "8", the multi-element display light emitting element 7c displays "8",
The light emitting diode lamp 7d is off. After 30 seconds, the multi-element display light emitting element 7c is "7", and the light emitting diode lamp 7d is turned on to indicate that the remaining time is 7 minutes and 30 seconds. That is, the light emitting diode 7c for displaying numbers
Indicates a value obtained by subtracting 1 every 1 minute, and the light emitting diode lamp 7b repeats lighting / blinking every 30 seconds, and when it reaches 0, cooking is terminated. Also, the display surface near the front surface of the light emitting diode lamp 7d is painted black except for the part where the shape of ".5" is formed on the transparent film, and the light emitting diode lamp 7d is located almost behind the ".5" at a certain distance. When the light emitting diode lamp 7d is turned on, this light is transmitted only to the portion of ".5", so the character of ".5" can be seen due to the difference in brightness and the user is It is easy to understand that it is a timer with seconds, and it is also excellent in design.

As described above, one light emitting diode for displaying a one-digit number and one light emitting diode lamp are used at intervals of 30 seconds.
Since it is possible to display minutes or less, the number of light emitting elements to be driven is smaller than that in the case where the same operation is performed by using a two-digit number display light emitting diode, so that the current consumption can be suppressed, so that the power supply circuit parts It is possible to reduce the size and cost, and it is also excellent in design.

(Embodiment 5) In FIG. 5, reference numeral 2 denotes a heater for heating a cooking product, which is built in the electric cooker body 1. The control circuit 3 includes a drive unit 4 including a relay for turning on / off the energization of the heater 2 in response to a signal from the drive start unit 8 such as a start switch. When the signal from the drive start unit 8 is received, The drive signal is output to the display means 7. Further, in order to display the numerical value of the cooking time on the display means 7, the light emitting diode 7c for numerical display for 30 minutes (0.
The display is provided with a light emitting diode lamp 7d. Further, as in the case of Example 4, a part of the display surface of the display means 7 is black-painted except for the part where the shape of "5" is formed on the transparent film, and the light-emitting diode lamp 7d is fixed substantially behind "5". It is placed at a distance. Further, the numerical display light emitting diode 7c includes a numerical value display portion 7e and a decimal point display portion 7f.

The operation of this embodiment will be described below. Driving start means 8 composed of a start switch for the user
When is pressed, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 to control the output. At the same time, the control circuit 3 causes the display means 7 to operate.
A driving signal is output to the display means 7 and the number display light emitting diode 7c and the light emitting diode lamp 7d included in the display means 7 display the time required for cooking. With this, the user can directly see how long it takes to cook as a numerical value, which is easy to understand. The heating of the heater 2 causes the cooking to proceed, and the cooking ends with the lapse of time. At this time, if the display of the display means 7 starts from "8", for example, the numerical value display portion 7e of the numerical display light emitting diode 7c is "8", and the numerical display light emitting diode 7c.
The decimal point display portion 7f and the light emitting diode lamp 7d are turned off. Numerical display LED 7c after 30 seconds
The numerical value display portion 7e of "7" indicates that "7", the decimal point display portion 7f of the numerical display light emitting diode 7c and the light emitting diode lamp 7d are turned on to indicate that the remaining time is 7 minutes and 30 seconds. In other words, the numerical display light emitting diode 7c displays a value obtained by subtracting 1 every other minute, and the decimal point display portion 7f and the light emitting diode lamp 7b of the numerical display light emitting diode 7c are repeatedly turned on and off every 30 seconds to 0. When that happens, cooking is finished. Moreover, in the present embodiment, the decimal point display portion 7 of the numeric display light emitting diode 7c is more than the drive current of the numeric display portion 7e of the numeric display light emitting diode 7c.
Since the value of the drive current limiting resistor of f is set small and the drive current is set to be appropriately large, the light emission luminance of the element of the decimal point display unit 7f is higher than the light emission luminance of the element of the numerical value display unit 7e. The user can easily better recognize the lighting of the decimal point display portion 7f.

Further, the display surface near the front surface of the light emitting diode lamp 7d is painted black except for the portion having the shape of "5" on the transparent film.
Since it is arranged at a certain distance behind "5", if the light emitting diode lamp 7d is turned on, "5"
Since this light is transmitted only to the portion, the character "5" can be seen due to the difference in light and shade, and the user can easily understand that it is a timer in 30 second intervals, and it is excellent in design.

As described above, one light emitting diode for displaying a one-digit number and one light emitting diode lamp are used for every 30 seconds.
Since it is possible to display minutes or less, the number of light emitting elements to be driven is smaller than that in the case where the same operation is performed by using a two-digit number display light emitting diode, so that the current consumption can be suppressed, so that the power supply circuit parts It is possible to reduce the size and cost.

(Embodiment 6) In FIG. 6, reference numeral 2 denotes a heater for heating a food item, which is built in the electric cooker body 1. The control circuit 3 receives a signal from the drive starting means 8 such as a start switch and the like, and a drive means 4 including a relay for turning on / off the energization of the heater 2 and a detecting means 5 for detecting a zero cross of the commercial power source 9. When receiving the signal from the drive starting means 8, in synchronization with the timing detected by the detecting means 5,
The first display means 7a, the second display means 7b, and the third display means 7g are provided with alternate display drive means 6 for outputting drive signals a and b, respectively. Also, the first display means 7a
The second display means 7b has a light emitting diode for displaying a number for displaying the time (minutes) required for cooking, and the third display means 7g has a light emitting diode lamp for displaying every 30 seconds. Especially, on the display surface near this light emitting diode lamp, ".
It is written as "minute".

The operation of this embodiment will be described below. Driving start means 8 composed of a start switch for the user
When is pressed, the main body 1 starts operating. As a result, the driving means 4 turns on / off the power supply to the heater 2 to control the output. At the same time, the alternate display drive means 6 drives each display means as described below.

First, there is a case where the number display light emitting diode of the first display means 7a is turned on, that is, the time required for cooking is set to 10 minutes or more. Here, consider the case of 12 minutes. At this time, the first display means 7
The number "a" for the numeral display light emitting diode of "a" and "2" for the numeral display light emitting diode of the second display means 7b are detected by the detection means 4, and the zero cross timing of the commercial power supply 9 shown in FIG. 6 (b). The lighting and blinking are alternately controlled by the drive signals a and b as shown in FIG. 6B to display "12". During this period, the light emitting diode lamp of the third display means 7g is not driven. Next, after 30 seconds, the numeral display light emitting diode of the first display means 7a displays "1" and the number display light emitting diode of the second display means 7b displays "1" in the same manner, while the third display The light emitting diode lamp of the display means 7g is turned on and blinks at the same timing as the drive signal b of FIG. 6 (b). That is, the numerical display light emitting diode of the second display means 7b and the light emitting diode lamp of the third display means 7g are simultaneously lit / blinking. Further, after 30 seconds, the driving of the light emitting diode lamp of the third display means 7g is stopped, and the display of the number display light emitting diode of the first display means 7a and the number display light emitting diode of the second display means 7b is performed. 11 "only. Thereafter, this operation is repeated until 10 minutes to decrease the displayed numerical value.

Next, there is a case where the number display light emitting diode of the first display means 7a is not turned on, that is, the time required for cooking is set to less than 10 minutes. In this case, the 10th place "0" of the minute display is not displayed, and the driving of the number display light emitting diode of the first display means 7a is stopped,
The second display means 7b and the third display means 7g are connected to the commercial power source 9
The alternate display drive means 6 drives the second display means 7b with the drive signal b and the third display means 7g with the drive signal a so as to alternately turn on / blink at the zero cross timing. Subtract. For example, in the case of 9 minutes and 30 seconds, the numeral display light-emitting diode of the second display means 7b is "9", the light-emitting diode lamp of the third display means 7g, and the alternate display drive means 6 are the drive signal b and the drive signal, respectively. The signal a is alternately driven to display 9 minutes and 30 seconds. After 30 seconds, the number display light emitting diode of the second display means 7b drives "9" by the drive signal b of the alternate display drive means 6, and the drive of the light emitting diode lamp of the third display means 7g is stopped. To display 9 minutes. After the next 30 seconds,
The numeral display light emitting diode of the second display means 7b is "8", and the light emitting diode lamp of the third display means 7g is similarly driven to display 8 minutes and 30 seconds. Cooking progresses due to the heat generated by the heater 2, and with the passage of time,
The displayed numerical value becomes "0" and cooking is completed.

When the number of digits of the displayed numerical value using the numeral display light emitting diode becomes two by the above-mentioned operation, the numerical values for the numerical values for which the driving current is large are displayed as in the present embodiment. The light emitting diode is used as the first display means 7a.
And the second display means 7b, and the display means 7 per cycle of the commercial power supply 9 is displayed by alternately lighting and blinking at the zero-cross timing of the commercial power supply 9 detected by the detection means 5. The peak of the current consumption of the whole is suppressed and averaged, and the current consumed by the display means 7 does not depend on the frequency of the commercial power supply 9 as in the first and second embodiments, so that the components of the power supply circuit are downsized.・ Low cost and labor saving of design are possible.

[0052]

As is apparent from the above embodiments, the first means of the present invention is a heater for heating food, a driving means for controlling the output of the heater, and a driving means for starting the driving means. Drive starting means for driving and a plurality of light emitting diodes for display,
It is divided into one block and is used as first and second display means for displaying an operation state, a detection means for detecting a zero cross of a commercial power source, and the first and second display for each timing detected by this detection means. An electric cooker capable of downsizing and cost reduction of parts of a power supply circuit section and labor saving of a design is provided as a structure having an alternating display drive means for alternately lighting and blinking the display of the means.

According to a second aspect of the present invention, at least one of the first and second display means constituting the first aspect of the present invention is provided with a numeral display light emitting diode, and a power supply circuit section is provided. It is possible to realize an electric cooker that allows the user to easily recognize the time required for cooking, as well as to reduce the size and cost of the parts, reduce the design labor, and so on.

The third means of the present invention is to display a heater for heating food, a driving means for controlling the output of the heater, a driving start means for starting the driving of the driving means, and a predetermined numerical value. An electric cooker having a structure including a light emitting diode lamp and a display means having a light emitting diode for displaying numbers, which enables downsizing and cost reduction of parts of a power supply circuit unit and allows a user to easily recognize a time required for cooking. Is realized.

According to a fourth aspect of the present invention, the display means for displaying the numerical value by the light emitting diode lamp of the third means of the present invention models the numerical value to be displayed by the difference in light transmission, and this display surface. And a light-emitting diode lamp arranged at a constant distance from the light-emitting diode lamp, the light emitted from the light-emitting diode lamp is radiated from the back side to display the displayed numerical value on the display surface as a difference in brightness, It is possible to reduce the size and cost of the parts, and to realize an electric cooker that is excellent in design because the user can easily recognize the time required for cooking.

A fifth means of the present invention comprises a numerical value display section and a decimal point display section in the display means of the third and fourth means of the present invention, and the luminance of the decimal point display section is higher than that of the numerical value display section. As a set configuration, it is possible to reduce the size and cost of the parts of the power supply circuit unit, and to realize an electric cooker with good visibility, in which the user can easily recognize the time required for cooking.

A sixth means of the present invention is a heater for heating food, a driving means for controlling the output of the heater,
Drive start means for starting the drive of the drive means, first and second display means having a light emitting diode for displaying numbers, third display means having a light emitting diode lamp for displaying a predetermined numerical value, and commercial For the detection means for detecting the zero cross of the power supply and the timing detected by this detection means,
When the first display means displays, the display of the first display means and the display of the second and third display means are turned on alternately.
When the first display means does not display the blink, the display of the second display means and the display of the third display means are alternately turned on and blinked, and the parts of the power supply circuit section are provided. It is possible to reduce the size and cost of the electric cooker, and to realize an electric cooker in which the user can easily recognize the time required for cooking.

[Brief description of drawings]

FIG. 1A is a block diagram showing a configuration of an electric cooker according to a first embodiment of the present invention. FIG. 1B is a timing chart diagram of the electric cooker.

FIG. 2A is a block diagram showing a configuration of an electric cooker according to a second embodiment of the present invention. FIG. 2B is a timing chart diagram of the electric cooker.

FIG. 3 is a block diagram showing a configuration of an electric cooker according to a third embodiment of the present invention.

FIG. 4 (a) is a front view of a main part of a display means of an electric cooker according to a fourth embodiment of the present invention. (B) is a cross-sectional view of the main part of the display means.

FIG. 5 is a block diagram showing a configuration of an electric cooker according to a fifth embodiment of the present invention.

FIG. 6A is a block diagram showing a configuration of an electric cooker according to a sixth embodiment of the present invention. FIG. 6B is a timing chart diagram thereof.

FIG. 7A is a block diagram showing a configuration of an electric cooker of a first conventional example. FIG. 7B is a timing chart diagram thereof.

[Explanation of symbols]

 2 heater 3 control circuit 4 driving means 5 detecting means 6 alternating display driving means 7 display means 7a first display means 7b second display means 7c numeral display light emitting diode 7d light emitting diode lamp 7e numerical value display section 7f decimal point display section 7g Third display means 8 Drive starting means 9 Commercial power source

Claims (6)

[Claims] 1. A heater for heating a cooked food, a drive means for controlling the output of the heater, a drive start means for starting the drive of the drive means, and a plurality of display light-emitting diodes. The diode lamp is divided into two blocks, and the first and second display of the operation state
Display means, detection means for detecting the zero cross of the commercial power supply, and the first means for each timing detected by this detection means.
And an alternate display drive means for alternately lighting and blinking the display of the second display means. 2. The number display light emitting diode is provided in at least one of the first and second display means.
The electric cooker described. 3. A heater for heating cooked food, a drive means for controlling the output of the heater, a drive start means for starting the drive of the drive means, a light emitting diode lamp for displaying a predetermined numerical value, and a numerical display. An electric cooker comprising a display means having a light emitting diode. 4. A display means for displaying numerical values by means of a light emitting diode lamp comprises a display surface in which the numerical value to be displayed is shaped by a difference in light transmission, and the light emitting diode lamp arranged at a position at a constant distance from this display surface. The electric cooker according to claim 3, wherein the light emitted from the light emitting diode lamp is emitted from the back surface to display the displayed numerical value on the display surface by a difference in brightness. 5. The electric cooker according to claim 3, wherein the display means includes a numerical value display section and a decimal point display section, and the luminance of the decimal point display section is set higher than that of the numerical value display section. 6. A first heater and a second heater provided with a heater for heating a cooked food, a drive means for controlling the output of the heater, a drive start means for starting the drive of the drive means, and a numerical display light emitting diode. Display means, and a third display means having a light emitting diode lamp for displaying a predetermined numerical value,
When the first display means displays the detection means for detecting the zero-cross of the commercial power source and the timing detected by the detection means, the first display means, the second display means, and the third display means.
Alternate display driving means for alternately illuminating / blinking the display of the second display means and alternately illuminating / blinking the display of the second display means and the third display means when the first display means does not display An electric cooker having a configuration.