JP4478624B2 - Cooking device - Google Patents

Description

  The present invention relates to a cooker capable of storing error information generated during a cooking operation such as cooking.

  Conventionally, in this type of cooker, an error may occur during operation or cooking operation. However, the error information that has occurred is usually unconditional in order to investigate and identify the cause of the error at a later date. The error information generated last is read from the nonvolatile memory by a specific key operation and displayed.

As an example of a heating cooker that can store error information, it is proposed to store the error content and the cooking content when an error occurs in a nonvolatile memory, and display the error content and cooking content by a specific key operation (Patent Document 1). The cooking device includes an operation unit having a key input unit and a display unit, a control unit that controls cooking operation, an error detection unit that is provided in the control unit and detects an error that occurs during the operation, and stores the cooking courses and error contents detected by the error detection means comprises a non-volatile memory, by specific key input at the key input unit, the control unit, cooking and error contents are stored in non-volatile memory and it has a configuration for displaying the courses on the display unit. For example, the service department displays the error content and cooking course by operating a specific key for a cooking device that has been found to be faulty, and obtains information that can be used as a reference for investigating the cause of the fault or the necessity of repair. be able to.
JP 2004-108637 A (paragraphs [0018] to [0019], FIG. 2, FIG. 3, FIG. 6)

In addition, there has been proposed an error display device for a cooking appliance that does not display uncertain error information when an error occurs in a microwave oven (Patent Document 2). According to this error display device, in the event of an urgent error in the repairability and safety of the microwave oven, the error information is immediately displayed on the display unit, and the repairability and safety are less or less urgent. In the case of an error that does not occur, the error information is displayed on the display unit when this is the set number of times 3 or 5 times in succession.
JP-A-8-5085 (paragraphs [0034], [0039], [0043], FIG. 1)

  However, the capacity of the nonvolatile memory that stores error information is limited, and the number of stored errors is also limited. When the user touches some error information during the cooking operation, the error may be repeated repeatedly in the same pattern. In this case, there is error information that repeatedly occurs during one cooking operation, but when the cooker returned as a failure by the user is inspected, the same error information that has been repeated may remain in the memory. . Of the error information, the old history is automatically deleted and overwritten with new error information. In this case, error information that may have occurred at an early stage useful for determining the cause of the failure has disappeared from the history, and the cause of the failure cannot be determined.

  With a limited amount of memory, information useful for improving the quality of the cooker may not be obtained. Further, if the capacity of the nonvolatile memory is increased, the number of errors that can be stored can be increased, but there is a problem that the manufacturing cost of the cooking device as a product increases.

  Therefore, in the cooker, the error information that is repeated among the error information that has occurred is not stored in the storage means as being invalid error information, but different error patterns can be stored, thereby storing the error information. There is a problem to be solved in that the storage area is used effectively and the storage means stores information useful for determining the cause of the failure.

  The object of the present invention is to store useful error information in the storage means by effectively using the storage area of the storage means by storing different error patterns in the storage means without storing the error information in the same pattern. An object of the present invention is to provide a cooking device that is stored without disappearing due to overwriting and can easily identify the cause of error occurrence.

In order to solve the above problems, a cooker according to the present invention includes an error detection unit that detects an error that occurs during a cooking operation, and a storage unit that stores an error pattern including a series of the errors that occur during the cooking operation. A controller for controlling the cooking operation having a non-volatile memory , wherein the controller matches the error pattern in which the series of errors detected by the error detecting means is already stored in the storing means. Only when the series of errors do not match the error pattern, the series of errors is stored in the storage means as a new error pattern.

According to this cooker, a series of consecutive errors detected by the error detection means is compared with an error pattern stored and set in advance in the storage means . In comparison, when a series of consecutive errors matches the error pattern is stores in the storage means when the first match, in the case of second or subsequent match is not stored in the storage unit processing Is done. By such processing, duplicate storage of the same error pattern in the storage means is avoided. In this way, since unusable consecutive errors that occur repeatedly in a certain pattern do not remain as a duplicate error history in the storage means, the storage area of the storage means can be used effectively, improving the quality in analyzing the cause of failure Useful consecutive errors are left in the error history. A series of consecutive errors may be when the number of consecutive errors stored as misuse errors exceeds a certain level.

  This cooker is provided with an operation / display unit including a key input unit and a display unit, and the control unit receives a series of errors stored in the storage unit by an input from a specific key provided in the key input unit. Can be displayed on the display means. The specific key provided in the key input means has a function of causing the display means such as a liquid crystal display device to display information stored in the storage means, and is stored in the storage means by input from the specific key. The contents of a series of errors can be displayed on the display means. By imposing the operation of such a specific key, it becomes possible for the service department of the product to professionally search for the cause of the failure and determine the necessity for repair. It is also possible to display the contents of individual error information.

In the above cooker, an error pattern, Ri by the particular key input means, at the time of production, the storage means based on the exclude input operation part of the error from the error pattern stored previously set in the storage means You can modify your memory settings. To modify setting of the error pattern can be provided an error pattern setting key as a particular key, modified set of error patterns in response to the error pattern setting key is operated is initiated. Modify settings for error patterns, specifying the error continuous excluded from a plurality of consecutive errors stored initially set to the storage means, the error continues continuous incorporated error patterns are identified. The corrected error pattern is stored in, for example, a nonvolatile memory provided as a storage unit. In addition, according to this error pattern setting method, an error pattern that was not assumed at the beginning of the design but is determined based on failure information from the user or the market can be determined at the time of production, at the time of factory shipment, or by a dealer. When handling a service, it can be manually added and stored in the storage means, so that only useful information can be left in the storage means as an error history by failure analysis.

  In the cooker, the control unit includes an analysis unit that analyzes a series of error patterns detected by the error detection unit and determines whether the analyzed pattern is an error pattern to be set in the storage unit. Can do. Further, the analysis unit can automatically set a series of errors in one error pattern until the error is repeated again. In other words, since an error pattern that can be excluded is automatically set by being stored once it has occurred, a series of errors that occur due to user-specific misuse such as incorrect output settings The error pattern does not remain in the history more than once.

  Each time a misuse error occurs, it checks whether there is the same error information already stored in the temporary storage data, and if there is the same error information, a series of error information including the error information Whether or not there is an error pattern consisting of If there is no error pattern including the error information, it is set in the storage means as a new error pattern, and the next error information is prepared. If there is an error pattern that includes the error information, it is determined whether or not a series of error information matches an already set error pattern. Store in memory and not in non-volatile memory after the second time.

The present invention, which is configured as described above, the storage means, when the series of error codes of the same pattern is once stored error pattern not stored as an error pattern, was tentatively error occurred Kakyu Many different error patterns are stored. Therefore, the storage area of the storage means provided in the control unit is effectively used , information on useful error patterns is stored without being lost by overwriting, and it is easy to specify the cause of error in the failure cause analysis of the cooker, A cooker capable of obtaining information on useful error patterns that can contribute to improvement can be obtained.

  Hereinafter, embodiments of a cooking device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is an external perspective view showing an embodiment of a cooker according to the present invention, FIG. 2 is a block diagram centering on a control unit of the cooker according to the present invention, and FIG. 3 is a misuse used in the cooker according to the present invention. It is a table | surface which shows the example of an error.

  FIG. 1 is an external perspective view of a cooking device according to the present invention, and more specifically, a combined cooking device 1 having an IH and a grill. The combined cooking device 1 includes a top plate 2 for placing a pan and the like, an IH heating unit 3 including three electromagnetic induction heaters (hereinafter referred to as “IH heaters”) disposed on the top plate 2, a fish And the like, and an exhaust port 5 formed on the back side for exhausting high-temperature heated air generated during cooking in the internal heating device 4 to the outside. Yes. The combined cooking device 1 includes a key operation unit 6 including a cooking switch on the proximal end side of the top plate 2, and a display unit 7 such as a liquid crystal display device capable of displaying operation information including error information. Although not shown, for example, a control unit having a circuit configuration on a control board is provided in a space inside the top plate 2 and on the side of the internal heating device 4.

As shown in FIG. 2, a microprocessor 10 as a control unit for controlling a cooking device according to the present invention includes a RAM area 11 for storing pattern data and temporary storage data, and a ROM area 12 for executing analysis means. . The RAM area 11 functions as a readable / writable storage unit, of which the part for storing the temporary storage data functions as a temporary storage data means. The microprocessor 10 receives power supply from the power supply circuit 13, receives input signals from the key input means 14 and an error detection means 17 composed of various sensors, and outputs them to the display means 15 and the heating means 16. Furthermore, the microprocessor 10 performs the exchange of storage data between the storage means 18 comprising a non-volatile memory.

  An example of a misuse error used in a cooker is shown in FIG. According to the example shown in FIG. 3, an overtemperature prevention function caused by an output setting error, an emptying detection function due to moisture evaporation, an overvoltage / undervoltage detection function caused by the use of a plurality of devices with the same power source, etc. There is a circuit protection function (substrate temperature detection function) by closing the mouth. Here, it is assumed that two thermistors are arranged with respect to one heating source, and the thermistors A and B are used as the thermistors.

  As for the misuse error shown in FIG. 3, the error information of the error codes E1 and E2 is stored under the condition that the thermistors A and B reduce the output at a specified temperature or higher in the overtemperature prevention function. In the free-running detection function, error information of error codes E3 and E4 is stored under the condition that the temperature gradient of the thermistors A and B is higher than a specified value and the output is lowered. Further, in the overvoltage / undervoltage detection function, the error information of the error code E5 is stored under the condition that the output is lowered when the power supply voltage is equal to or higher than the specified value. Further, in the circuit protection function, the error information of the error code E6 is stored under the condition that the thermistor C reduces the output at a specified temperature or higher.

Usually, when an error due to misuse occurs, the operation is often continued once the heating output is lowered without stopping the heating operation. For this reason, there is an error generation pattern in which several errors occur successively in a predetermined order in one heating operation. For example, when the water in the pan placed on the IH heating unit 3 is reduced, the emptying detection function is activated first. Thereafter, when the IH heating unit 3 is used as it is, an overtemperature preventing function works. When the use of the IH heating unit 3 is further continued, the temperature around the circuit rises and the circuit protection function works. Therefore, as a sequence of error codes, a series of consecutive errors occurs in a pattern of E3 (or E4) → E1 (or E2) → E6.

FIG. 4 shows an example of error control in the cooking device according to the present invention. That is, it is determined whether the error that has occurred during the heating operation is a misuse error (S1). If the determination in S1 is YES, the error is stored in address A (S2). If the determination in S1 is NO, heating is continued. After S2, it is determined whether or not consecutive errors have reached the number to be compared (S3). If the determination in S3 is NO, the address A is incremented by 1 (S4), and the process returns to S1. That is, when the next misuse error occurs, the error can be stored in another address. If the determination in S3 is YES, it is determined that the number of stored consecutive errors can be compared, and a series of consecutive errors are transferred to comparison with an error pattern stored in advance in a nonvolatile memory (S5). . Oite the comparison of error patterns, first determines whether or not a series of consecutive errors is consistent with the error pattern stored set (S6). If S6 in the determination is set to NO (does not match the error pattern stored set), the process returns to S1. In the case of YES determination, it is determined whether or not the match with the stored error pattern is the second or later (S7). If the determination result in S7 is YES (matching with the stored error pattern is the second or later), the process returns to S1 without storing in the nonvolatile memory. If the determination result in S7 is NO, that is, if the sequence of consecutive errors matches the stored error pattern is the first match, the error pattern is stored in the nonvolatile memory (S8). ), And then returns to S1. According to the error control shown in FIG. 4, it is compared with an error pattern that has already been stored or set in the nonvolatile memory, depending on whether or not the number of consecutive errors (in this example, misuse errors) has become comparable. It is, if they match is stored in non-volatile memory only when the uppermost first match.

FIG. 5 is a flowchart showing an error pattern setting procedure regarding error control in the cooking device according to the present invention. This procedure is usually executed at the time of production, at the time of factory shipment, or at the time of service response by a store or the like. It is determined whether or not the error pattern setting key has been operated in the power-on state (S11). If the determination in S11 is NO, the process returns to S11, and enters a standby state waiting for the operated key to be an error pattern setting key. Determination of S11 is YES, that is, the operated key be a error pattern setting key to set the error information that will be partially excluded from the error pattern stored set in advance in the storage unit during production (S12). It is determined whether or not the pattern setting is completed (S13). If the determination in S13 is NO, the process returns to S12 and waits for a new exclusion error state input. When the pattern setting is completed and the determination in S13 is YES, the pattern data that has been set is stored in the nonvolatile memory (S14), and the process returns to S11.
The above is an operation procedure for excluding specific pattern data from the pattern data set for storage. However, when pattern data is added to the pattern data set for storage, the same operation procedure is used for additional setting. Thereafter, by storing the pattern data that has been set in the nonvolatile memory, the pattern data can be added and stored.

  FIG. 6 is a flowchart showing another example of error control in the cooking device according to the present invention. According to this flowchart, it is determined whether or not the error that has occurred during the heating operation is a misuse error (S21). When the determination result of S21 is NO, heating is continued, but when the determination result of S21 is YES, the error information is stored in address A in the temporary storage data (S22). Next, it is determined whether or not there is the same error in the temporarily stored data (S23). If the determination in S23 is NO, that is, if the error information is not in the temporary storage data, the address A is updated to +1 by the next address (S24), and the process returns to the original S21.

  If the determination in S23 is YES and the same error is included in the temporarily stored data, the error has occurred again. Therefore, data including a series of error information including the error information is a pattern. It is determined whether or not the data exists (S25). If the determination in S25 is NO, that is, if there is no pattern data composed of a series of error information including the error information, the series of error information is a new error pattern and is stored in the temporary storage data. The data including a series of error information including the error information is set as pattern data (S26), and the process returns to S21. If the determination in S25 is YES (that is, there is data of pattern data including the error information), it is determined whether or not the error pattern match is the second or later (S27).

If S2 7 of the determination is YES, the flow returns to S21. In the case of NO determination, the pattern data is stored in the nonvolatile memory (S28), and then the process returns to S21. In the error control shown in FIG. 6, error information is stored in the temporary storage data, and when the error information is detected, it is determined whether or not there is the same error in the temporary storage data. When it is detected again, it is determined whether or not there is an error pattern for the first time. Therefore, it can be said that this error control is an effective control mode for misuse errors in which the same error information is repeated several times.

The external appearance perspective view which shows one Embodiment of the cooking device by this invention. The control block diagram of the cooking appliance by this invention. The table | surface which shows the example of the misuse error used with the cooking device by this invention. The flowchart which shows an example of the error control in the cooking device by this invention. The flowchart which shows the error pattern setting procedure regarding the error control in the cooking device by this invention. The flowchart which shows another example of the error control in the cooking device by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite heating cooker 2 Top plate 3 IH heating part 4 Internal heating apparatus 5 Exhaust port 6 Key operation part 7 Indicator

Claims (5)

A control unit for controlling cooking operation,
The control unit has a microcomputer for controlling the control unit,
Outside the microcomputer, there are error detection means for determining an error code of an error that has occurred in the cooking operation, and storage means that is a nonvolatile memory,
In the control unit that stores the error code determined by the error detection unit in the storage unit,
The microcomputer has a readable / writable storage unit,
The readable / writable storage unit has temporary storage data means for storing error codes generated in the cooking operation at successive addresses,
When a new error occurs, the control unit additionally stores the error code of the new error in the temporary storage data means,
Searching the storage means as a new error pattern for the predetermined number of error codes retroactively from the new error code stored in the temporary storage data means;
A cooker comprising a control unit that stores the new error pattern in the storage means when an error pattern that matches the new error pattern is not found. A control unit for controlling cooking operation,
The control unit has a microcomputer for controlling the control unit,
Outside the microcomputer, there are error detection means for determining an error code of an error that has occurred in the cooking operation, and storage means that is a nonvolatile memory,
In the control unit that stores the error code determined by the error detection unit in the storage unit,
The microcomputer has a readable / writable storage unit,
The readable / writable storage unit has temporary storage data means for storing error codes generated in the cooking operation at successive addresses,
In the storage means, an error pattern consisting of the predetermined number of error codes in advance is stored and set,
When a new error occurs, the control unit additionally stores the error code of the new error in the temporary storage data means,
Searching the storage means as a new error pattern for the predetermined number of error codes retroactively from the new error code stored in the temporary storage data means;
When the stored error pattern that matches the new error pattern is found, control for storing the new error pattern in the storage means only when the number of times the stored error pattern is found is the first time A cooking device comprising a portion. The cooker includes an operation / display unit including key input means and display means,
The cooker according to claim 1 or 2, wherein the control unit displays the error code string stored in the storage unit on the display unit by an input from a specific key provided in the key input unit. . Wherein the error pattern for error pattern stored previously set in the storage means, Ri by the particular said key input means, a portion of excluding the error code input operation and the input operation for adding an error code 4. The cooker according to claim 3 , wherein the storage unit is stored based on the setting. The cooking device according to any one of claims 2 to 4 , wherein the storage means stores and sets an error pattern including the predetermined number of error codes in a manufacturing stage of the cooking device. .