JPH0626656A - Heating cooker - Google Patents

Abstract

PURPOSE:To obtain a heating cooker, capable of finishing a heated food well regardless of service interruption, which has occured on the half way of heating. CONSTITUTION:A heating cooker, having a heating chamber whose inside is heated by a heating source to cook a food stored in the heating chamber by heating, is provided with a preserving means 1b1, preserving an operating information before service interruption and the temperature of the heating chamber upon the service interruption during the service interruption when the service interruption has occured in mid-way of heating, and a heating condition correcting means 1b2, correcting remaining heating conditions based on the operating information preserved in the preserving means 1b1 and the temperature of the heating chamber upon the service interruption when a power supply is restored from the service interruption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker such as a microwave oven and a microwave oven, and more particularly to a countermeasure against a power failure during cooking.

[0002]

2. Description of the Related Art A heating cooker such as a microwave oven and a microwave oven presses a key for which temperature, time, etc. are programmed in advance according to the type of cooking, or the user operates a key or knob every time cooking is performed. Adjustment is performed by setting the temperature, time, etc. and starting.

[0003]

Since the conventional heating cooker is cooked as described above and no countermeasure is taken against the power failure, when a power failure occurs during cooking and the power failure is restored. , The cooker is reset,
It is in the initial state. For this reason, try cooking again or think about the remaining time properly in mind, that is, it seems that it was heated for about 10 minutes before the power outage, so it will be enough for 30 minutes remaining, so manually operate the keys etc. I had no choice but to continue cooking. Therefore, there is a problem that the material is wasted, or even if it is completed, the finish is poor and it cannot be eaten deliciously.

The present invention has been made to solve the above problems, and when a power failure occurs in the middle of the process, the operation information before the power failure and the temperature of the heating chamber at the time of the power failure are saved during the power failure, and the power source is restored. An object of the present invention is to obtain a heating cooker that corrects the remaining heating conditions based on the operation information stored at the time and the temperature of the heating chamber at the time of power failure and cooks.

[0005]

A cooking device according to the present invention has a heating chamber whose inside is heated by a heating source, and heats and cooks an object to be heated placed in the heating chamber. If there is a power failure in the middle of heating, the storage means that saves the operation information before the power failure and the temperature of the heating cabinet at the time of power failure during the power failure, and the operation saved in the storage means when the power is restored. Heating condition correction means for correcting the remaining heating conditions based on the information and the temperature of the heating chamber at the time of power failure is provided.

Further, in a heating cooker that has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated placed in the heating chamber, if a power failure occurs during heating, Saving information that saves the operating information before the power failure and the temperature of the heating cabinet at the time of the power failure during the power failure, and the operation information saved in the saving means when the power is restored and when the power is restored and when the power is restored and restarted. And a heating condition correction means for correcting the remaining heating conditions based on the temperature difference in the heating chamber.

Furthermore, if a power failure occurs during heating,
At least a storage means for storing the operation information before the power failure during the power failure, and a display means for displaying a power failure when the power is restored are provided.

Further, when a power failure occurs during heating and the power failure is restored, the output signal of the power failure detection circuit, which is stopped during the power failure and is output along with the restoration of the power supply, is output after a predetermined time delay. A delay circuit is provided.

Further, when a power failure occurs during heating and the power failure is restored, connection control means for delaying a predetermined time after restoration and connecting a circuit with large power consumption is provided.

[0010]

According to the present invention, when there is a power failure during heating, the storage means stores the operation information before the power failure and the temperature of the heating chamber at the time of the power failure during the power failure, and when the power is restored, the storage means. Since the remaining heating conditions are corrected based on the operation information stored in and the temperature of the heating chamber at the time of power failure, the object to be heated is finished well regardless of the power failure.

Further, if there is a power failure during heating, the storage means stores the operation information before the power failure and the temperature of the heating chamber at the time of the power failure during the power failure, and when the power is restored, it is saved in the storage means. Since the remaining heating conditions are corrected based on the operation information and the temperature difference in the heating chamber when the power is restored and when the power is restored and restarted, the object to be heated is finished even better regardless of the power failure.

Further, when the power is restored, the display means displays that there is a power failure, so that the user can know the abnormality.

When a power failure occurs during heating and the power failure is restored, the output signal of the power failure detection circuit, which is stopped during the power failure and is output when the power is restored, is delayed for a predetermined time and then output. Therefore, the power supply voltage of the microcomputer as the heating and cooking control device is prevented from fluctuating rapidly.

Further, when there is a power failure during heating and the power failure is restored, a circuit consuming a large amount of power is connected after a predetermined time delay after restoration, so that the power supply voltage of the microcomputer as the heating and cooking control device suddenly increases. It is prevented from fluctuating.

[0015]

【Example】

Example 1. 1 is a block diagram showing an embodiment of the present invention, FIG.
FIG. 3 is a waveform diagram explaining the operation of the embodiment of FIG. In the figure, reference numeral 1 is a microcomputer, and 2 is a battery, which is a backup power supply for operating the microcomputer 1 in a low power consumption mode when a power failure occurs. 3 is a power failure detection circuit, which receives the AC voltage as an input, and uses a transistor Q ₁ ,
The Q ₂ is a circuit that outputs a detection signal of a pulse waveform shown in FIG. 2 (a). Reference numeral 4 is a power failure time detection circuit, which is composed of a time constant circuit composed of a capacitor C and a resistor R. 5 is A
C100V commercial AC power source, 6 is a transformer, 7 is a rectifier circuit, and 8 is a voltage stabilizing circuit. The microcomputer 1 has a CPU 1a, a memory 1b for storing data and calculation results, and an input / output circuit (not shown), and a relay 11 for turning on / off the power supply to the heating heater. It functions as a heating and cooking control device that controls various operations of the heating cooker based on a program stored in advance, such as operation control, lighting control of various lamps 12 and input of detection signals from the temperature sensor 13. is there.

In the above configuration, if there is a power failure during heating, that is, if the output signal of the power failure detection circuit 3 disappears, the heating time until the power failure and the cooking contents (for example, a temperature of 180 ° C. for 17 minutes for cookies). The operation information before the power failure such as time data) and the internal temperature at the time of the power failure are stored in the area 1b1 configured by the RAM of the memory 1b. This operation is performed for about 200 msec after the power failure before the microcomputer 1 shifts to the low power consumption mode. Next, when the power supply is restored, the remaining heating conditions are corrected based on the operation information stored in the memory 1b1 and the temperature inside the refrigerator at the time of power failure. Then, the subsequent heating is performed under the corrected heating conditions. The correction of the heating condition is performed by the heating condition correction means which is software stored in advance in the area 1b2 formed by the ROM of the memory 1b. According to this embodiment, the quality of the object to be heated can be clearly grasped from the temperature at the time of power failure. Therefore, the remaining heating conditions can be corrected according to the quality. For example,
The low temperature inside the refrigerator at the time of power failure means that the power was interrupted while the temperature inside the chamber was rising. In this case, therefore, cooking should be restarted from the beginning. Therefore, the object to be heated is finished well regardless of the power failure.

Example 2. In this embodiment, the remaining heating conditions are corrected based on the operation information before the power failure and the power failure time obtained from the output signal of the power failure time detection circuit 4. According to this embodiment, the object to be heated is finished well regardless of the power failure time.

The operation will be described below with reference to the flow chart shown in FIG. Press the start key to start heating (step S31). Blackout detection circuit 3 when heating starts
It is determined whether or not there is a power outage based on the presence or absence of the output signal of (1), that is, if there is no detection signal, it is determined that there is a power outage (step S32), and the microcomputer 1 is shifted to the low power consumption mode (step S33). At this time, the microcomputer 1 before the transition can maintain normal operation 20.
During about 0 msec, the operation information before the power failure such as the heating time until the power failure and the contents of cooking and the internal temperature when the power failure occurs are stored in the area 1b1 of the memory 1b. When a power failure occurs, the power failure time detection circuit 4 starts discharging (step S34).
Next, it is determined whether or not the power is restored (step S3
5) If NO, repeat this determination. Yes
Then, the low power consumption mode of the microcomputer 1 is released, and the power failure time is calculated from the power failure time detection input, that is, the output signal of the power failure time detection circuit 4. An optimum remaining heating condition is set based on this power failure time and the operation information before the power failure stored in the area 1b1 of the memory 1b (step S36).
Then, the heating is restarted (step S37), and if the set time has elapsed (step S38), the cooking is finished (step S39). Note that step S38 is NO.
In the case of, it returns to step S32.

Example 3. In this embodiment, in order to correct the remaining heating conditions, the operating information before the power failure and the temperature of the heating chamber obtained from the temperature sensor when the power is restored and restarted are corrected. According to this embodiment, for example, even if the ambient temperature is low and the temperature inside the heating chamber is large, or the temperature inside the heating chamber is low due to a long power failure time, the object to be heated is finished well regardless of this.

Example 4. In this embodiment, the remaining heating conditions are corrected on the basis of the operation information before the power failure and the temperature difference of the heating chamber at the time of the power failure and when the power is restored and restarted. According to this embodiment, the effect of the heat quantity on the object to be heated while the operation is stopped can be understood from the temperature difference at the time of power failure and the temperature difference at the time of restart. Therefore, the remaining heating conditions can be corrected accurately. For example, if the temperature difference is large, it can be seen that cooking is performed due to residual heat even during a power outage, so that the remaining heating time may be short, for example. From the above, the object to be heated is finished better regardless of the power failure.

The operation will be described below with reference to the flow chart shown in FIG. The start key is pressed to start heating (step S71). When heating is started, it is determined whether or not there is a power failure based on the presence or absence of the output signal of the power failure detection circuit 3. That is, if the detection signal disappears, it is determined that there is a power failure (step S72). Then, during about 200 msec, the operation information before the power failure such as the temperature of the heating cabinet, the heating time until the power failure and the cooking content is stored in the area 1b1 of the memory 1b (step S73), and the microcomputer 1 is set to the low power consumption mode. (Step S74). Next, it is determined whether or not the power is restored (step S75), and if NO, this determination is repeated. If YES, the low power consumption mode of the microcomputer 1 is released (step S76), and the optimum remaining heating is performed based on the operation information before the power failure and the temperature difference of the heating chamber at the time of the power failure and when the power is restored and restarted. Conditions are set (step S78). Next, it is determined whether or not the set time has elapsed (step S79), and if it has elapsed, the cooking is ended (step S80). Note that step S72
If is NO, the process proceeds to step S79. Also, step S
If 79 is NO, the process returns to step S72.

Embodiment 5. In this embodiment, a non-volatile memory, such as E, is used as a storage means for storing the operation information before the power failure.
² PROM (Electrical Erasable)
Programmable Read Only Me
(mory) is used. According to this embodiment, a battery for holding the stored contents becomes unnecessary. Therefore, the object to be heated is inexpensive and is well finished regardless of power failure.

The operation will be described below with reference to the flow chart shown in FIG. Press the start key to start heating (step S41). Blackout detection circuit 3 when heating starts
It is judged whether there is a power failure or not by the presence or absence of the output signal of, that is, if there is no detection signal, it is judged that there is a power failure (step S42), and the operation information before the power failure such as the heating time and cooking contents until the power failure in the non-volatile memory and the power failure occurrence The internal temperature at that time is stored (step S43). This operation is 200ms, which enables the microcomputer to maintain normal operation even if there is a power failure.
Perform during ec. Next, it is determined whether or not the power failure is an instantaneous power failure of about 200 msec (step S44), and if it is a momentary power failure, the operation before the power failure detection signal disappears is continued (step S45) and it is determined whether or not the set time has elapsed. Then (step S46), if the time has passed, the cooking is ended (step S47). In step S44, it is determined whether or not the power supply is restored (step S48) if it is not an instantaneous blackout, and if it is restored, the remaining heating conditions are set based on the contents stored in the nonvolatile memory (step S49), and heating is performed. Restart (step S50). After that, the operations of steps S46 and S47 are performed.

Example 6. In this embodiment, at least the operation information before the power failure is stored during the power failure, and when the power is restored, it is displayed that there is a power failure. As a display, for example, a cooking start key having a built-in light emitting diode is made to blink to enter a waiting state for start. According to this embodiment, since the user can know that there is an abnormality, the cooked state can be confirmed and the object to be heated can be finished well.

Example 7. FIG. 6 is a block diagram showing a seventh embodiment,
FIG. 7 is a waveform diagram for explaining the operation of the seventh embodiment. 6 and 7, the parts denoted by the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. Reference numeral 15 is a delay circuit, which outputs a pulse output signal of the power failure detection circuit 3 which is stopped during a power failure and is output when the power is restored for a predetermined time T when the power is restored.
It is a circuit that delays by _D and outputs to the microcomputer 1. This delay circuit 15 is a system reset IC
What is marketed as (integrated circuit) can be used. When a power failure occurs, the power supply 5V drops and falls below the detection voltage of the system reset IC. Next, when the power supply is restored and the operating limit voltage of the system reset IC is exceeded, V _OUT is pulled to GND for 100 msec. As a result, the output pulse of the power failure detection circuit 3 is input to the microcomputer 1 with a delay of 100 msec after the power is restored.

According to this embodiment, as shown in FIG. 7B, the microcomputer 1 can be operated in a state where the power source 5V is sufficiently stable after the power source is restored. Therefore, the microcomputer 1 as the heating and cooking control device
It is possible to prevent the microcomputer 1 from malfunctioning (runaway) due to the abrupt change in the power supply voltage of the microcomputer 1 due to the large power consumption of the microcomputer 1 when the power is rapidly returned from the low power consumption mode. . The delay time depends on the power supply 5 of the microcomputer 1.
It is stable until V is sufficiently stable for 100 msec, but it is not limited to this.

Example 8. In this embodiment, connection of a circuit that consumes a large amount of power and is a burden on the microcomputer 1 is delayed for a while after the power is restored. That is, the connection control means is provided for delaying the connection of the circuit that consumes a large amount of power for a predetermined time after the power is restored to the microcomputer 1. The function of this connection control means is achieved by a program stored in the memory in advance.
The ones with large power consumption are, for example, heaters for heating,
The relay circuit that turns ON / OFF the power supply of this
A predetermined time, 100 msec in this embodiment, is delayed for connection to the microcomputer 1. According to this embodiment, after the power source 5V of the microcomputer 1 is sufficiently stabilized, a circuit with large power consumption is connected. Therefore, the same effect as that of the sixth embodiment can be obtained.

[0028]

As described above, according to the present invention, when a power failure occurs during heating, the storage means saves the operation information before the power failure and the temperature of the heating chamber at the time of the power failure during the power failure, and the power is restored. At this time, since the remaining heating conditions are corrected based on the operation information stored in the storage means and the temperature of the heating chamber at the time of power failure, the object to be heated is well finished regardless of the power failure. Also, if there is a power failure during heating, the storage means saves the operation information before the power failure and the temperature of the heating cabinet at the time of the power failure during the power failure, and the operation information saved in the storage means when the power is restored. Also, since the remaining heating conditions are corrected based on the temperature difference in the heating chamber at the time of power failure and when the power is restored and restarted, the object to be heated goes up even better regardless of the power failure. Therefore, it is possible to prevent the material from being wasted or the cooking being failed due to the power failure.

Further, when the power is restored, the display means displays that there is a power failure, so that the user can know the abnormality. Therefore, the cooked state can be confirmed and the object to be heated can be finished well.

Further, when there is a power failure during heating and the power failure is restored, the output signal of the power failure detection circuit, which is stopped during the power failure and is output along with the restoration of the power supply, is output with a delay of a predetermined time. Therefore, it is possible to prevent the microcomputer as the heating and cooking control device from being abruptly changed and the microcomputer from malfunctioning.

Further, when there is a power failure during heating and the power failure is restored, a circuit with large power consumption is connected after a predetermined time delay after restoration, so that the power supply voltage of the microcomputer as the heating and cooking control device suddenly increases. This prevents fluctuations and malfunction of the microcomputer.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a waveform diagram illustrating the operation of the embodiment of FIG.

FIG. 3 is a flowchart illustrating the operation of the second embodiment.

FIG. 4 is a flowchart illustrating the operation of the fourth embodiment.

FIG. 5 is a flowchart illustrating the operation of the fifth embodiment.

FIG. 6 is a configuration diagram showing a seventh embodiment of the present invention.

FIG. 7 is a waveform diagram illustrating the operation of the seventh embodiment.

[Explanation of symbols]

 1 Microcomputer 1a CPU 1b Memory 1b1 Operation information storage area before power failure 1b2 Heating condition correction means storage area 3 Power failure detection circuit 4 Power failure time detection circuit 15 Delay circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sato 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Appliances Co., Ltd. Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Yuuji Hoshino 1728 Omaeda, Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. A heating cooker that has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated in the heating chamber, when a power failure occurs during heating. Based on the operation information before the power failure and the temperature of the heating cabinet at the time of the power failure during the power failure, based on the operation information and the temperature of the heating cabinet at the time of the power failure when the power is restored A heating cooker provided with heating condition correction means for correcting the remaining heating conditions. 2. A heating cooker that has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated placed in the heating chamber, if a power failure occurs during heating, A storage means that saves the operation information before the power failure and the temperature of the heating cabinet at the time of the power failure during the power failure, and the operation information and the power information that was saved in the above-mentioned storage means when the power was restored and the power was restored and restarted. A heating cooker characterized in that the remaining heating conditions are corrected based on the temperature difference of the heating chamber at that time. 3. A heating cooker that has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated placed in the heating chamber, if a power failure occurs during heating, A heating cooker characterized by comprising at least storage means for storing operation information before a power failure during a power failure and display means for displaying a power failure when the power is restored. 4. A heating cooker which has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated placed in the heating chamber, and there is a power failure in the middle of heating. When the above is restored, the heating cooker is provided with a delay circuit that stops during the power failure and outputs the output signal of the power failure detection circuit that is output when the power is restored after delaying the output signal for a predetermined time. 5. A heating cooker that has a heating chamber whose inside is heated by a heating source and heats and cooks an object to be heated placed in the heating chamber, has a power failure during heating, and the power failure occurs. When the above is restored, the heating cooker is provided with a connection control means for delaying a predetermined time after the restoration and connecting a circuit with large power consumption.