JP2010133572A - Method of controlling operation of high-frequency heating cooker and the high-frequency heating cooker using the operation control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of controlling operation of a high-frequency heating cooker compensating decline in heating output by automatically setting heating cooking parameters without requiring manual operation requiring observation and determination by a user when part of a plurality of magnetrons is broken and stopped. <P>SOLUTION: Corresponding to outage portions of the plurality of magnetrons, an alternative heating parameter for performing heating cooking similar to that before the outage by the operable magnetron is stored beforehand. During outage of the magnetrons, it is determined whether or not the outage is one pipe failure state (S3), and when the one pipe failure state is determined, it is determined whether or not setting of one pipe operation permission is completed (S4). When setting of the one pipe operation permission is completed, the alternative heating parameter is used to automatically set a heating parameter and heating correction is performed at each stage of multi-stage heating (S5). Cooking is performed by the corrected heating. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an operation control method for a high-frequency heating cooker such as an upper and lower two-tube microwave oven for business use, etc., and particularly to a high-frequency cooking device using the operation control method. The present invention relates to an operation control method and a high-frequency heating cooker that perform optimum heating in the case of performing.

  The heating cooker includes a heating chamber for heating an object to be heated, a magnetron for generating a microwave, a waveguide for guiding the microwave generated by the magnetron to the heating chamber, and the magnetron. And a blower for cooling (for example, see Patent Document 1).

  The cooker for business use has two magnetrons juxtaposed laterally apart from each other on the upper side of the heating chamber, two waveguides arranged on the upper side of each magnetron, and on the lower side of each magnetron. Two blowers arranged, and two air passages for blowing the air blown by each of the blowers around each magnetron, and microwaves generated by the two magnetrons are propagated through the two waveguides and heated. It is comprised so that it may radiate | emit to a chamber (for example, refer patent document 1). For business use, an upper and lower two-tube microwave oven having two magnetrons at the top and bottom is also provided.

FIG. 11 is a rear perspective view showing an example of an upper and lower two-tube microwave oven. As shown in FIG.
In the microwave oven, electromagnetic wave generating means 2 and 3 corresponding to two magnetrons are mounted on the top and bottom of a cabinet 11 (only a base 11a and a front frame 11b are shown) of the heating cooker body 10. In the electromagnetic wave generation means 2 and 3, the drive units 22 and 32 face up and down, and the electromagnetic wave generation units 21 and 31 are arranged on the opposite sides of the drive units 22 and 32. The electromagnetic waves generated when the electromagnetic wave generating means 2 and 3 are driven by the transformers 4 and 4a are arranged at the front center of the heating cooker body 10 through the electromagnetic wave supply means 5 (the other supply means 5a is arranged below). Are individually led to a heating chamber (not shown). The waveguides 53 and 53a constituting the electromagnetic wave supply means are arranged vertically and extend from the rear of the casing 13 of the heating cooker body 10 to the front center. The blowers 6 and 6a individually cool the electromagnetic wave generators 21 and 31, respectively. In relation to the heating chamber, an exhaust duct 14 for exhausting the internal air to the outside and an air supply duct 15 for supplying air from the third blower 16 into the heating chamber are provided.

  For two magnetrons connected to an AC power source via a high voltage generator, operation control is performed to generate a microwave for each half wave of each cycle of AC power. When one of the upper and lower pipes is out of order, conventionally, an error is displayed and the heating operation is stopped. However, in a microwave oven for business use, there is an example in which heating is possible with only one tube output according to user settings because there is a problem in cooking work if operation becomes impossible at all.

  An example of a technique related to one-tube failure detection in a two-tube microwave oven is disclosed in Patent Document 2. This detection technology makes use of the fact that the humidity signal will contain noise due to the influence of microwaves during the period in which the microwaves are generated, and sampling is performed for each heating chamber that is irradiated with microwaves from each tube. It is determined whether or not the humidity signal thus received includes noise due to the influence of microwaves, and if the noise is not included in either humidity signal, it is determined that the microwave is not energized.

  Patent Document 3 discloses an input unit that program-sets cooking conditions such as cooking time, finish temperature, and heating output in order of cooking steps, a storage unit that sequentially stores cooking steps programmed by the input unit for each step, and this storage A memory start key for instructing execution of the prepared cooking program, and a control unit for sequentially executing the stored cooking steps step by step in response to a signal from the memory start key. The control unit stores the stored cooking program. Calling means for sequentially calling each cooking step, control signal output means for outputting a signal to be executed in accordance with the heating condition storing the called cooking step, and detecting the end of execution of the called cooking step End detection means and the signal from this step end detection means Cooking step update means for calling the next cooking step by inputting to the stage, and a cooking programmable microwave oven provided with storage holding means for holding the stored contents is presented in the storage section. ing. The “(cooking) step” referred to in Patent Document 3 is considered to be substantially synonymous with the “heating stage” referred to in the present invention.

  In recent microwave ovens, since the number of stored cooking programs has increased significantly, in order to improve user operability, a plurality of cooking programs are classified into hierarchies and stored as a cooking database. And the search efficiency by the control unit at the time of selection by the user is improved.

  In a heating cooker having two magnetrons, if one magnetron fails and stops, the heating amount is insufficient unless the failed magnetron is repaired or replaced, and satisfactory cooking cannot be obtained. Even if setting was made to enable operation with one tube, the heating time had to be adjusted by the user himself. In addition, the demand for heat cooking cannot be met at the time of repair or replacement.

  In a state where one magnetron has stopped due to a failure, the overall output is usually ½, so the heating time may be doubled, that is, the same heating may be performed twice in succession. However, when multi-stage heating stages having different outputs are set in the memory, if the heating is performed twice in succession, the output order of each heating stage becomes meaningless and the finish is affected.

In addition, a special sequence such as a thawing sequence with different upper and lower output ratios cannot be taken simply by adding a heating time, and must be adjusted while looking at the finish.
Japanese Patent Laid-Open No. 5-322187 JP-A-4-92390 Japanese Utility Model Publication No. 56-170602

  Therefore, in a high-frequency heating cooker that is equipped with multiple magnetrons as high-frequency generators and cooks heated items according to the cooking menu, when a part of the magnetron stops malfunctioning, it is heated with the remaining operable magnetron. There is a problem to be solved in that automatic cooking according to the cooking menu is performed by alternative heating to compensate for the above.

  An object of the present invention is to provide a plurality of magnetrons as a high-frequency generator, and in a high-frequency heating cooker that cooks a heated object in accordance with a cooking menu, the remaining operation is possible when a part of the magnetron stops in failure. It is an object to provide an operation control method for a high-frequency heating cooker that can automatically select an alternative heating that supplements heating with a simple magnetron, and a high-frequency heating cooker that uses the operation control method.

  In order to solve the above problems, the operation control method for a high-frequency heating cooker according to the present invention includes a heating sequence having multiple heating stages according to a cooking menu and defining heating parameters for a plurality of magnetrons in each heating stage. Is set as a database, the heating parameters of the plurality of magnetrons in the multi-stage heating stage are set according to the heating sequence selected from the database according to the selected cooking menu, and according to the set heating parameters A plurality of alternative heating sequences for performing cooking with at least one of the magnetrons remaining in the database when at least one of the plurality of magnetrons has stopped in the database in the high-frequency heating cooker that performs heating cooking of the heated object Set up And selecting the alternative heating sequence to be performed by the operable magnetron from the database in response to at least one of the magnetrons having failed and replacing the heated object according to the selected alternative heating sequence It is characterized by an operation control method for heating.

  In the database, when at least one of the plurality of magnetrons has failed and stopped, a plurality of alternative heating sequences for performing cooking with at least one remaining operable magnetron are set and stored. An alternative heating sequence to be performed by the operable magnetron is automatically selected from the database in response to the failure of the stand-alone magnetron, and the alternative heating of the heated object is performed according to the selected alternative heating sequence. Therefore, even if at least one of the plurality of magnetrons is out of order, the heating of the heated object according to the alternative heating sequence is automatically performed without requiring any user operation, and the workability of cooking is improved. Can be suppressed.

  In the operation control method of the high-frequency cooking device, the heating parameter can be a heating output or a heating time in each magnetron. An alternative heating sequence that approximates cooking by the cooking menu can be obtained by one or a combination of heating output and heating time.

  In the operation control method of the high-frequency heating cooker, the setting of the alternative heating sequence includes the heating time when the plurality of magnetrons operate in parallel, and the decrease in the heating output amount due to the magnetron that has failed and stopped. Correction can be made in a manner to compensate by extending the heating time of the operable magnetron. The alternative heating sequence is set so that the heating output when the plurality of magnetrons operate in parallel is the reduced heating output amount due to the magnetron that has stopped the failure. Correction can be performed in a manner to compensate for the increase. When the decrease in the heating power is compensated by the increase in the heating power, when the decrease in the heating power is not completely compensated by the increase in the heating power of the operable magnetron, the setting of the alternative heating sequence is: Correction can be made in such a manner as to further compensate by extending the heating time of the operable magnetron. Furthermore, the setting of the alternative heating sequence can be performed by correcting the heating stage using the operable magnetron as the final heating stage.

  For example, in the case of the upper and lower two-tube magnetron, if the output ratio is the same, the one-tube output is corrected to an output that does not exceed the two-tube output, and if it cannot be equivalent to the two-tube output, the heating time is corrected, Heating can be performed. When the output ratios of the two-tube magnetrons are different, the final heating stage is used when heating with the upper one tube (lower one tube failure stopped) and when heating with the lower one tube (upper one tube failure stopped). On the other hand, a heating stage corrected with a different ratio (based on the ratio at the time of two-tube output) can be added to perform heating.

  The present invention may also be a high-frequency cooking device using the operation control method as described above. That is, the high-frequency cooking device has a box, a heating chamber, a control unit, a storage unit, an operation unit, and a plurality of magnetrons. Since the control method is used, the high-frequency heating cooker can be automatically continued until the next maintenance even when some of the magnetrons are stopped.

  In the operation control method of the high-frequency heating cooker according to the present invention configured as described above and the high-frequency heating cooker using the operation control method, the heating sequence by the remaining operable magnetron is automatically performed when some of the magnetrons are stopped. Thus, the alternative heating sequence is corrected and the operation of the high-frequency heating cooker is continued. Therefore, there is no need for adjustment by the user, and there is no need to make adjustments while watching the cooked finish of the heated object, and the effort and burden required for the user's work / operation can be reduced.

  In addition, when the heating sequence is composed of multiple heating stages with different outputs, the finish of cooking is improved, and heating can be performed in the shortest time in a single tube (one magnetron) operation. Moreover, since the use time / use number of parts in the heating per time can be performed at a minimum, the life as a high frequency heating cooker can be extended. Furthermore, variations in the finish when only one pipe is heated at the top and bottom are corrected, and a more favorable finish can be secured.

  Hereinafter, with reference to the drawings, embodiments of the high-frequency cooking device and the operation control method thereof according to the present invention will be described. FIG. 1 is a schematic block diagram of a control device that controls operation of a high-frequency cooking device according to the present invention and various peripheral devices related thereto.

  As shown in FIG. 1, the high-frequency cooking device includes a microprocessor 1 as its control device. In the vicinity of the microprocessor 1, a power source 2 that receives power supply, a display unit 3 that displays operation contents and control contents to a user in response to a command from the microprocessor 1, and a microprocessor 1 that receives an operation from the user Control the input means 4 to be input to the magnetron, the relay 5 for the magnetron 1 for controlling the magnetron 1, the relay 6 for the magnetron 2 for controlling the magnetron 2, and the cooling fan for cooling the devices such as the magnetron and the high voltage transformer. The cooling fan relay 7 for performing the operation, various sensors 8 provided in various places of the high-frequency heating cooker for detecting the operating state of the high-frequency heating cooker, and various types necessary for controlling the high-frequency heating cooker A non-volatile memory 9 for storing data is provided.

  FIG. 2 is a flowchart followed when the microprocessor 1 shown in FIG. 1 controls the high-frequency cooking device. As shown in FIG. 2, when heating is started by an input by operating a heating start key that is one of the input means 4, the two-tube failure is stopped based on the magnetron output state at the previous heating. It is determined whether or not there is [Step 1; hereinafter abbreviated as “S1”. If the two-pipe failure is stopped, the heating operation is not performed and the error is stopped [S2]. If it is determined in S1 that the two pipes are not in a stopped state, it is determined [S3] whether only one of the pipes is in a stopped state. When it is determined in S3 that only one of the pipes is in the failure stop state, it is determined [S4] whether or not the one-pipe operation has been set for permission by the user. If the one-pipe operation permission has not been set in the determination of S4, error stop [S2] is set. If the one-tube operation permission has been set in the determination of S4, the heating time (heating output) is corrected [S5] for each heating stage, and the heating operation [S6] is continued with the correction contents. Here, the one-tube operation permission setting is a setting for permitting alternative heating in which the heating operation is switched to the operation of another operable magnetron when one of the magnetrons is stopped due to failure. By the key operation or the like, the alternative heating availability information is set by bit information or code information corresponding to the number of switching patterns, and such setting is stored in a storage means such as a nonvolatile memory. When one of the magnetrons is out of order, the heating operation is automatically switched to an alternative heating operation with another operable magnetron based on this permission setting.

  3 to 5 show, as an example of the operation control method of the high-frequency heating cooker according to the present invention, an example of a multi-stage heating sequence including a multi-stage heating stage in the form of a table. 3 shows the heating time and heating output of each magnetron when both magnetrons arranged at the top and bottom are normal, and FIG. 4 shows the operation control method for changing the heating time of the upper magnetron when the lower magnetron stops at failure. ing.

  As shown in FIG. 3, in the multi-stage heating sequence, when the two magnetrons are both normal, the upper and lower heating outputs are symmetrical. That is, in each of the first to fourth heating stages, the heating time is determined, and the heating output of the upper and lower magnetrons is the same in each heating time. When the lower magnetron stops failure (heating output is 0%), as shown in Fig. 4, the heating output of the upper 1 tube is left as it is, and the heating time is extended to be twice the heating time during the operation of 2 tubes. If so, almost the same cooking can be performed. In the case where the upper magnetron stops in failure in FIG. 3, the correction method in the case of extending the heating time of the lower one tube is the same. If the heating sequence is corrected in this way, the heat generation of the operating magnetron is not much different from that in the two-tube operation, so the influence on the reliability of the magnetron only needs to be taken into account for the increase in operating time.

  FIG. 5 shows the heating time and heating of another magnetron (upper magnetron) when one (lower) magnetron stops in failure in the multi-stage heating sequence shown in FIG. 3 where the output ratios of the upper and lower magnetrons are the same during normal operation. An operation control method for changing the output is shown. In this operation control method, as shown in FIG. 5, the heating output of the lower pipe (lower magnetron) is increased and corrected so as to correspond to the heating output of the two pipes. However, if the heating output cannot be increased to the equivalent of the heating output of the two pipes due to the limit of the heating capacity, the heating time is also extended and corrected.

  That is, as in the first heating stage, when the heating output is originally 100% even under normal conditions, the heating output cannot be increased, so the heating time is doubled. When the heating output is 70% in the normal state as in the second heating stage, the total heating amount is 137 (seconds) × 0.7 × 2 (≈192), so that the tube is heated when one tube is heated. When the heating output is 100%, the heating time is 192 (seconds), that is, 3 minutes and 12 seconds. In the third heating stage and the fourth heating stage, the heating output at normal time is 40% and 20%, respectively, so the heating output is increased to double the heating output (100% or less even if 80% and 40%). It is possible to cope with.

  In FIG. 3, when the lower magnetron stops malfunctioning, the heating output of the upper 1 pipe is corrected to increase, and if the heating output cannot be increased to the total of 2 pipes due to the limit of the heating capacity, the heating time is also extended. The correction method in this case is the same. If the heating sequence is corrected in this way, the extension of the cooking time can be kept to a minimum, so that a long waiting time after ordering food can be avoided.

  FIGS. 6-8 has shown the example of the multistage heating sequence by the form of a table | surface as an example of the operation control method of the high frequency heating cooking appliance by this invention. In this multistage heating sequence, the upper and lower output ratios differ from the second heating stage. 6 shows the ratio of heating time and heating output of each magnetron when both magnetrons arranged above and below are normal, and FIG. 7 changes the heating time and heating output of the lower magnetron when the upper magnetron stops at failure. The operation control method is shown.

  As shown in FIG. 6, in the case of a multi-stage heating sequence in which the heating outputs of the upper and lower magnetrons are different in the normal state, when the upper magnetron stops in failure, as shown in FIG. The increase is corrected so as to correspond to the heating output of However, if the heating output cannot be increased by the limit of the heating capacity, the heating time is corrected to be increased. For example, in the second heating stage, the heating amount at the normal time is 150 (seconds) × (0.6 + 0.8) = 210, and this is covered with 100% heating output with only one tube of the lower magnetron. Is addressed with a heating time of 210 seconds (3 minutes 30 seconds). In addition, in order to correct the finishing dispersion when only the lower one pipe is heated due to the failure of the upper one magnetron, 30% of the final fourth stage heating time (heating output) is used as the fifth heating stage (correction heating stage). Add the same 40% heating stage as the final heating stage.

  In the case of the multistage heating sequence shown in FIG. 6, when the lower magnetron is stopped due to a failure, first, the heating output of the upper one pipe is corrected to increase to correspond to the heating output of the two pipes. However, if the heating output cannot be increased due to the limitation of the heating capacity, the heating time is corrected to be increased. The first to fourth heating stages are the same as the countermeasures shown in FIG. 10% of the final 4th heating stage heating time (at the time of 2 tube output) as the 5th stage (correction heating stage) in order to correct the finishing dispersion when only the upper 1 tube is heated due to the failure of the magnetron of the lower 1 tube The heating power is 40%, which is the same as the final heating stage). Since the heating output of the upper magnetron is originally higher than that of the lower magnetron in the normal fourth heating stage, correction of the additional heating time in the fifth heating stage is suppressed.

  Here, an example of a conventional heat cooking database will be described with reference to FIG. In conventional cooking, heating cooking is performed by sequentially applying a heating output and a heating time defined for each heating stage. Here, the combination of the heating output and the heating time defined for each heating stage is called a cooking parameter. Since the cooking parameters vary depending on the cooking item (hereinafter referred to as menu), the control unit of the cooking device stores a database using the menu as a search key in the storage unit and stores the menu specified by the user. And a function of searching for cooking parameters corresponding to the menu.

  The heating output of the upper and lower magnetrons is symmetric in the cooking parameters of menu 1, but the heating output of the lower magnetron is large in the second heating stage and the third heating stage in the heating cooking parameters of menu 2, and the fourth heating Since the heating output of the upper magnetron is large on the stage, the heating outputs of the upper and lower magnetrons are not symmetrical. Hereinafter, a cooking parameter is similarly defined for a plurality of cooking menus, and a cooking database is configured. The conventional automatic cooking system is a system that performs cooking by searching for and applying cooking parameters corresponding to the cooking menu selected by the user using the cooking database stored in this way.

  FIG. 10 shows an example of a cooking database in the form of a table in the operation control method for a high-frequency cooking device according to the present invention. In FIG. 10, N / A indicates Not Available, that is, it cannot be used because of a failure stop. In each menu, the cooking parameters for the two-pipe operation are the same as the cooking parameters shown in FIG. Menu 1 is a menu that performs symmetric heating up and down, and menu 2 is a menu that performs asymmetric heating up and down.

  In each menu of this cooking database, the cooking parameter for 1 when the lower 1 pipe is operating is the cooking parameter with the same output as that when the 2 pipe is operated and the heating time is extended. The parameters are set so that the heating output is as close as possible to the double heating output during 2-pipe operation at the time of low heating output because cooking is performed with the same heating time as in 2-pipe operation. Cooking parameters.

  The cooking parameters for the upper 1 pipe operation 1 and the upper 1 pipe operation 2 are set in the same manner. The 5th heating stage of Menu 2 is an additional stage that compensates for the lack of heating due to the 1-pipe operation found as a result of cooking experiments, but the heating characteristics are asymmetric between the upper 1-pipe operation and the lower 1-pipe operation. The heating parameter is asymmetric.

  When one of the magnetrons of the cooking device stops and becomes unusable, the control unit selects one of the operating states at the time of one-pipe operation by default, and performs other operations according to user settings. If the state can be selected, it is preferable because the user can select either the operation state of whether to shorten the cooking time or to maintain the output of the single magnetron.

The schematic block diagram which shows the control apparatus which manages operation control of the high frequency heating cooker by this invention, and its periphery apparatus. The flowchart which shows an example of the operation control method of the high frequency heating cooker by this invention. The multistage heating sequence which shows an example of the operation control of the high frequency heating cooking appliance by this invention. The correction example at the time of a lower magnetron failure stop in the multistage heating sequence shown in FIG. The correction example at the time of an upper magnetron failure stop in the multistage heating sequence shown in FIG. The multistage heating sequence which shows another example of the operation control of the high frequency heating cooking appliance by this invention. The correction example at the time of an upper magnetron failure stop in the multistage heating sequence shown in FIG. The correction example at the time of a lower magnetron failure stop in the multistage heating sequence shown in FIG. An example of the conventional heat cooking database. The cooking database which memorize | stored the alternative heating sequence by this invention. The rear perspective view which shows an example of an up-and-down 2 pipe type microwave oven.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Microprocessor 2 Power supply 3 Display means 4 Input means 5 Magnetron 1 relay 6 Magnetron 2 relay 7 Cooling fan relay 8 Various sensors 9 Non-volatile memory

Claims (7)

A heating sequence having a plurality of heating stages defined as heating parameters of a plurality of magnetrons according to a cooking menu is stored as a database, and the plurality according to the heating sequence selected from the database according to the selected cooking menu In the high-frequency heating cooker that sets the heating parameters of the magnetron and performs heating cooking of the heated object according to the set heating parameters,
In the database, when at least one of the plurality of magnetrons has failed and stopped, a plurality of alternative heating sequences for performing cooking by at least one remaining operable magnetron are set and stored, and at least one unit is stored. The alternative heating sequence to be performed by the operable magnetron is selected from the database in response to the failure of the magnetron, and the alternative heating of the heated object is performed according to the selected alternative heating sequence. Operation control method of the high-frequency cooking device.   The method for controlling operation of a high-frequency heating cooker according to claim 1, wherein the heating parameter is a heating output or a heating time in the multi-stage heating stage of each magnetron.   In the setting of the alternative heating sequence, the heating time when the plurality of magnetrons operate in parallel, the decrease in the heating output amount due to the magnetron that has stopped the failure, in the multi-stage heating stage of the operable magnetron 3. The operation control method for a high-frequency heating cooker according to claim 2, wherein correction is performed in a manner to compensate by extending the heating time.   In the setting of the alternative heating sequence, the heating output when the plurality of magnetrons operate in parallel is the same as the decrease in the heating output due to the magnetron that has stopped the failure in the multi-stage heating stage of the operable magnetron. 3. The operation control method for a high-frequency heating cooker according to claim 2, wherein correction is performed in a manner that compensates for an increase in heating output.   The setting of the alternative heating sequence is based on the fact that the decrease in the heating power amount cannot be compensated for by the increase in the heating power of the operable magnetron, in the multi-stage heating stage of the operable magnetron. 5. The operation control method for a high-frequency heating cooker according to claim 4, wherein correction is performed in such a manner as to further compensate by extending the heating time.   The setting of the alternative heating sequence is performed by correcting in a mode in which a heating stage is added to the multi-stage heating stage by the operable magnetron as a final heating stage. The operation control method of the high-frequency heating cooking appliance as described in one term.   A high-frequency cooking device using the operation control method according to any one of claims 1 to 6.

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