JPH07113525A - Heating cooker - Google Patents

Abstract

PURPOSE:To permit correct operation upon being restored from service interruption by a method wherein the time of service interruption and the process information of automatic booking are stored into a memory means when the service interruption has occurred during automatic cooking. CONSTITUTION:When a service interruption detecting means 5 has detected the service interruption of a commercial power supply 1 during operation under automatic cooking function, a control means 4 stores the time upon generating service interruption, number of process, an elapsed time from the starting of the process and a load temperature into a memory means 7. Then, upon being restored from the service interruption, the period of time of service interruption is obtained from a restoring time from the service interruption and the time of the service interruption based on the memory in the memory means 7 and when the period of time of the service interruption is longer than a given period of time, the excitation of a cooker through automatic cooking function is stopped but when the case is in a case except above-mentioned case, the starting of heating is commanded from a process before the service interruption. According to this method, the operation upon being restored from service interruption can be effected correctly.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Recently, an increasing number of heating cookers have an automatic cooking function to improve usability. This is effective for cooking that requires energization for a long time and complicated temperature settings.

The automatic cooking function includes a function of selecting and executing a preset menu and a function of automatically detecting and executing the material and amount of the load. Data such as the temperature setting of the process and the heating time are set, and the load is heated according to the data.

[0004]

The above-mentioned heating cooker is capable of coping with a power failure that occurs during automatic cooking by stopping heating, continuing the process before the power failure after recovery from the power failure, and the temperature before and after the power failure. Some have continued to energize when the difference is small (for example, JP-A-64-33425). These mainly focus on short-time power outages such as momentary power outages, and there is a problem in that these judgments are not appropriate depending on long-term power outages and cooking contents. For example, in the first example,
When a power failure occurs for a long time, inconvenience occurs, and in the following example, there is a problem that the continuation of energization may vary depending on the amount of load, heat capacity, and the difference between ambient temperature and load temperature. .

[0005]

In order to solve the problems in the present invention, a commercial power source, a power failure detecting means for detecting a power failure of the commercial power source, a backup power source, and a timekeeping backed up by the backup power source when the commercial power source fails In a heating cooker provided with a means and a memory means, and a control means having an automatic cooking function for heating and controlling a load based on a signal and control data from the memory means and the time counting means, the control means is energized by the automatic cooking function. When the power failure detection means detects a power failure of the commercial power source, the time when the power failure occurs, the process number, the elapsed time from the start of the process and the load temperature are stored in the memory means, and when the power failure is restored, based on the memory. Calculate the power failure time from the power failure recovery time and the power failure time, and if the power failure time is more than a certain time, stop the power supply by the automatic cooking function and Is for instructing the start of heating from before the power failure process.

[0006]

With the above structure, the heating cooker of the present invention is
If a power failure occurs during automatic cooking, the power failure time and automatic cooking process information are stored in the backed up memory means, and when the power is restored, the power is supplied by the automatic cooking function when the power failure time is a certain time or more based on the memory. Is stopped, and in other cases, the heating start is instructed from the process before the power failure, so that the operation after the power failure recovery can be appropriately selected. In addition, if there is a power outage during a period when automatic cooking cannot be continued, the power supply by the automatic cooking function is stopped. For example, if stewed cooking that requires heating for a long time or unattended automatic cooking is not stopped by a short power outage and if the power outage lasts for a long time, the automatic cooking function will surely stop the energization. To be done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a commercial power source, 2 is a heating means composed of an electric heater, 3 is a stabilizing power source circuit for control, which is connected to the commercial power source 1 together with the heating means 2. Reference numeral 4 denotes a microcomputer for controlling the heating energization power of the heating means 2 by the control means, and sets the energization power of the heating means 2 in the manual energization mode or the energization mode by the automatic cooking function according to the operation mode set by the user. The clocking data is read from the clocking means 6, and the data is written to and read from the memory means 7. Reference numeral 5 denotes a power failure detection means for detecting a power failure of the commercial power supply 1 from the output of the stabilized power supply circuit 3, and outputs the detection signal to the control means 4. Reference numeral 6 is a time counting means of the control means 4 for automatically counting time, for example, for counting up an internal register every one second, and data of this register is read from and written to the control means 4. be able to. Reference numeral 7 is a memory means of the control means 4 which can write and read data from the control means 4. Reference numeral 8 is a backup power supply, and the clock means 6 and the memory means 7 are connected to the stabilized power supply circuit 3 and the backup power supply 8 via backflow prevention diodes 9a and 9b, respectively. Then, when the commercial power supply 1 is supplied, power is supplied from the stabilized power supply circuit 3 through the diode 9a, and during the power failure, the backup power supply 8 supplies the diode 9a.
It is configured to supply power via b.

The operation timing of the heating cooker according to the embodiment of the present invention will be described with reference to FIG.

In the figure, A is the state of the commercial power source 1, B is the output of the power failure detection means 5, and C is the control means 4 to the heating means 2.
Shows the control output to. T1 is the power failure start time of the commercial power source 1, T2 is the recovery time of the commercial power source 1, and Tx is the power failure period permission time. When the power failure period is longer than the permission time Tx, the power supply is stopped.

In the case of the operation 1, it is assumed that the commercial power source 1 has a power failure from T1 and is restored at T2 before Tx. At this time, for example, the time of T1 is 00:00 (0:00), the time of T2 is 00:02, and Tx is 3 minutes.

In the case of operation 2, the time of T1 is 00:00.
Time of 0 and T2 is 00:05, and Tx is 3 minutes. At time T1, the power failure detection means 5 detects a power failure of the commercial power source 1 and outputs the result to the control means 4. When the control means 4 receives the power failure detection signal, it immediately outputs a signal for stopping the energization to the heating means 2. Further, the T1 time data, the control temperature, the process number, the elapsed time from the start of the process, etc. are written in the memory means 7. After that, the control means 4 stops its operation due to the voltage drop of the stabilized power supply circuit 3. Note that the clock means 6 and the memory means 7 continue the operation and perform the memory holding operation by the backup power source 8, respectively.

When the commercial power supply 1 recovers from the power failure at the time T2, power is supplied from the stabilized power supply circuit 3 and the control means 4 returns to operation. Further, the output of the power failure detection means 5 outputs a signal in a non-detection state. After the operation is restored, the control means 4 reads out the power failure time data, the control temperature, the process number, the elapsed time from the start of the process, etc. from the memory means 7, and further reads out the current time from the clock means 6. When the formula 1 is satisfied, the automatic cooking state is restored, and the restart of energization is instructed from the process number executed before the power failure and the time from the process start.

T2−T1 ≦ Tx (Equation 1) In the case of operation 1, T2−T1 = 2 ≦ Tx = 3 (Equation 1 is satisfied), so that energization is restarted.

In the case of operation 2, T2-T1 = 5> Tx
= 3 (Equation 1 is not satisfied), so the energization is stopped.

In the present embodiment, the control means 4, the power failure detection means 5, the clock means 6 and the memory means 7 are described separately, but the control means 4 in which some or all of these functions are combined is described. Even when used, similar control can be performed.

Therefore, in the heating cooker of the present invention, when a power failure occurs during automatic cooking, the control means 4 stores the power failure time and the process information of the automatic cooking in the memory means 7 backed up by the backup power source 8 to recover from the power failure. Based on the memory, when the power failure time is over a certain time, the power supply by the automatic cooking function is stopped, and in other cases, the heating start is instructed from the process before the power failure, so the operation after the power failure recovery is selected appropriately. be able to. In addition, if there is a power outage during a period when automatic cooking cannot be continued, the power supply by the automatic cooking function is stopped.

[0018]

EFFECT OF THE INVENTION In the heating cooker of the present invention, when a power failure occurs during automatic cooking, the power failure time and the process information of the automatic cooking are stored in the backup memory so that the operation after the power failure is restored properly. You can choose. Also, if there is a power outage during a period when automatic cooking cannot be continued, power supply by the automatic cooking function is stopped.

Therefore, since the operation at the time of restoration from the power failure becomes accurate, the cooking is not stopped by the instantaneous interruption, and it is possible to provide the heating cooker which is convenient and highly safe.

[Brief description of drawings]

FIG. 1 is a block diagram of a heating cooker showing an embodiment of the present invention.

FIG. 2 is an operation timing chart of the heating cooker according to the embodiment of the present invention.

[Explanation of symbols]

 1 Commercial Power Supply 4 Control Means 5 Power Failure Detection Means 6 Clock Means 7 Memory Means 8 Backup Power Supply

Claims (1)

[Claims] 1. A commercial power source (1), a power failure detecting means (5) for detecting a power failure of the commercial power source (1), a backup power source (8), and the backup power source (8) when the commercial power source (1) fails. ) Has a timer means (6) and a memory means (7) backed up, and an automatic cooking function for heating and controlling a load by signals from the memory means (7) and the timer means (6) and process control data. A heating cooker provided with a control means (4), wherein the control means (4) is
When the power failure detection means (5) detects a power failure of the commercial power source (1) during energization by the automatic cooking function, the time when the power failure occurs, the process number, the elapsed time from the start of the process, and the load temperature are stored in the memory means. In (7), when a power failure is restored, the power failure time is calculated from the power failure recovery time and the power failure time based on the memory, and when the power failure time is a certain time or longer, the energization by the automatic cooking function is stopped and otherwise. In the case of, a heating cooker characterized by instructing to start heating from the process before the power failure.