JP2925791B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device such as a microwave oven.

[0002]

2. Description of the Related Art In a cooking device such as a microwave oven, heating conditions have been conventionally controlled by a microcomputer,
Those that have realized optimal cooking are provided. Such a microwave oven or the like uses a rewritable nonvolatile memory such as an EEPROM so that the user can store cooking conditions such as heating time and heating intensity in advance, so that cooking can be performed from the next time. Cooking under the same heating conditions can be performed each time without performing a re-input operation of the conditions.

[0003]

There is no rewritable non-volatile memory currently in use with an unlimited number of rewrites, and the number of rewrites is 100,000 to 100 times.
Limited to 10,000 times. That is, if the data is rewritten repeatedly to some extent, the data cannot be rewritten at last, and the written data cannot be guaranteed. In such a case, data cannot be read. A similar problem also occurs when a failure occurs in mounting the printed circuit board.

In such a case, the control unit including the microcomputer and the like repeats retry of reading data from the nonvolatile memory. However, if the data has been destroyed, data reading cannot be achieved after all, so even if the operator operates the knob provided on the front of the microwave oven or the like and selects the cooking menu, for example,
The operation of the microwave oven does not follow the selection operation, and as a result, a desired cooking operation cannot be performed.

Accordingly, an object of the present invention is to solve the above-mentioned technical problem and to provide a cooker which does not hinder the cooking operation even if an abnormality occurs in a nonvolatile memory for storing cooking conditions. is there.

[0006]

According to a first aspect of the present invention, there is provided a cooker comprising: a rewritable nonvolatile memory for storing cooking conditions; and a cooking operation read out from the nonvolatile memory for cooking operations. A cooking device having control means for controlling, wherein the storage means is different from the non-volatile memory in which standard cooking conditions are stored, and the control means has failed in reading the cooking conditions from the non-volatile memory. In some cases, the reading is retried a predetermined number of times, and when the cooking conditions cannot be read even after the retry of the predetermined number of times, the standard cooking conditions stored in the storage unit are read. I do.

[0007]

According to the above arrangement, when the control means has failed to read the cooking conditions even though the control means has performed the reading attempts a predetermined number of times due to the abnormality in the nonvolatile memory, Standard cooking conditions are read from the storage means. Thus, even when an abnormality occurs in the nonvolatile memory, it is possible to set a good cooking condition and perform the cooking operation.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a block diagram showing an electric configuration of a microwave oven which is a cooking device according to one embodiment of the present invention. This microwave oven has a main control unit 1 including a microcomputer and the like.
The main control unit 1 is connected to a heating source drive control unit 2 for controlling a heating source (not shown), such as a magnetron or a heater, under the control of a predetermined operation program. I have. An EEPROM 3, which is a rewritable nonvolatile memory for storing cooking conditions such as the heating time and the amount of heat during heating, is connected.
Further, the main control unit 1 is connected to an operation unit 4 which is used when inputting cooking conditions to the EEPROM 3 and has a keyboard for inputting various settings and an operation knob for selecting a cooking menu. Have been. Further, a display unit 5 for displaying cooking conditions such as cooking time is connected to the main control unit 1. In the main control unit 1,
A ROM 6 is provided as storage means for storing standard cooking conditions for each selectable cooking menu.

With this configuration, when one of the cooking menus is selected by the operation knob, the main control unit 1 reads out the cooking conditions corresponding to the cooking menu from the EEPROM 3 and controls the heating source drive control unit 2 according to the cooking conditions. Give a signal. Based on this control signal, the heating source drive control section 2 energizes a heating source such as a magnetron or a heater, so that desired heating cooking is achieved.

In this embodiment, the main control unit 1 has three kinds of flags DEMO and ERROR and a count number RETRY for operation control. Flag DE
MO is a flag indicating the operation mode of the microwave oven, and is set when the mode is the demonstration mode. here,
The “demo mode” is an operation mode in which only a reading process of cooking conditions and the like is performed for explanation at a store, and no heating output is performed. The setting of the demonstration mode is performed, for example, by a predetermined key input operation from the operation unit 4.

The flag ERROR is set in the EEPROM.
3 is a flag that is set when there is an abnormality in 3. Further, the main control unit 1 sets the count number RETRY to EEPRO.
This corresponds to the number of trials for reading the cooking conditions from M3. FIG. 2 is a flowchart for explaining the operation of the main control unit 1 according to the selection of the cooking menu. When the cooking condition setting mode is selected by the operation of the operation unit 4, the current cooking condition is displayed on the display unit 5 in step n1, and then whether or not an operation for changing the cooking menu is performed in step n2. Is determined. When the cooking menu is changed, it is determined in step n3 whether the flag DEMO is set. That is, it is determined whether the mode is the demo mode. If it is in the demo mode, the process proceeds to step n5.
At step n4, it is determined whether the flag ERROR is set. That is, before, EEPROM
3 is determined to be abnormal, the flag ER
Since ROR has been set, the process proceeds to step n11 at this time.

In step n5, the count number RE
For example, 256 is set in TRY. Step n6
Then, the main control unit 1 makes an attempt to read out the cooking conditions corresponding to the set cooking menu to the EEPROM 3. As a result of this trial, if the reading of the cooking conditions succeeds, the process returns to step n1. When the reading of the cooking condition has failed, in step n8, the count R
ETRY is decremented, and in a step n9, it is determined whether or not the count number RETRY is 0. Before the count number RETRY becomes 0, step n6
And the reading attempt is repeated. When the reading of the cooking condition is not achieved even if the count number RETRY becomes 0, in other words, when the cooking condition cannot be read even after 256 reading attempts, the EEPR is used.
Assuming that an abnormality has occurred in OM3, step n10
Sets the flag ERROR. Then, in step n11, standard cooking conditions stored in advance corresponding to each cooking menu are read from the ROM 6 to the main control unit 1. Subsequent processing returns to step n1.

By the control operation of the main control unit 1 as described above,
In the case of the normal cooking mode which is not set to the demonstration mode, if the reading of the cooking conditions cannot be achieved despite the 256 attempts to read the cooking conditions, the standard cooking conditions are stored in the ROM 6. Is read from. Thus, even when an abnormality occurs in the EEPROM 3, a good cooking operation can be performed.

If the reading of the cooking conditions cannot be achieved despite the 256 trials of reading the cooking conditions, the flag ERROR is set. As a result, due to the processing in steps n4 and n11, the reading of the cooking conditions from the EEPROM 3 is not performed thereafter, the standard cooking conditions are immediately read from the ROM 6, and the cooking operation is performed according to the standard cooking conditions. Will be For this reason, even when an abnormality occurs in the EEPROM 3, if the operator operates the knob or the like of the operation unit 4 and selects a cooking menu, the cooking conditions are promptly set, so that an operation defect may occur. There is no.

On the other hand, when the demonstration mode is set, the process shifts from step n3 to step n5, so that reading of the cooking conditions from the EEPROM 3 is attempted regardless of whether the flag ERROR is set. As a result, when an abnormality occurs in the EEPROM 3, the responsiveness from the setting of the cooking menu to the display of the cooking condition on the display unit 5 becomes extremely poor.
Thus, the operator can know that the EEPROM 3 is abnormal. In this way,
The inspection of the EEPROM 3 can be easily performed.

The present invention is not limited to the above embodiment. For example, in the above embodiment, a microwave oven was described as an example. However, the present invention is not limited to a microwave oven, and for example, it is possible to set cooking conditions, such as an oven, which is effective in performing cooking. It can be widely applied to cookers. In addition, various design changes can be made without changing the gist of the present invention.

[0017]

As described above, according to the cooking device of the present invention,
Even if an abnormality occurs in the nonvolatile memory, the cooking operation can be performed well by setting the standard cooking conditions. Thus, even if an abnormality occurs in the non-volatile memory, no great trouble occurs for cooking.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric configuration of a microwave oven which is a cooking device according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main control part (control means) 2 Heat source drive control part 3 EEPROM (nonvolatile memory) 4 Operation part 5 Display part 6 ROM (storage means)

Claims (1)

(57) [Claims] 1. A cooking device having a rewritable nonvolatile memory for storing cooking conditions and control means for reading cooking conditions from the nonvolatile memory and controlling a cooking operation, wherein standard cooking conditions are stored. The storage means is provided separately from the non-volatile memory, and the control means retry the reading a predetermined number of times when the reading of the cooking condition from the non-volatile memory fails, and also performs the retry of the predetermined number of times. If the cooking conditions cannot be read, the standard cooking conditions stored in the storage means are read.