JPH05306818A - Microwave oven - Google Patents

Abstract

PURPOSE:To control additional heating in an automatic menu sense by providing an additional heating time setting means and a manipulation key, provided that a cancel key is not turned ON by manipulation after finishing heating for a predetermined cooking menu. CONSTITUTION:When an oven one-minute heating key 47 for additional. heating is turned ON within one minute after opening and closing a door 16 without manipulating a cancel key 45 to be turned ON after finishing predetermined cooking, a finishing set level which is one step higher than the preceding finishing level is set so that additional heating is performed suitably at the set level. Accordingly, additional heating at the time of insufficient heating can be realized simply by single manipulation of the oven one-minute heating key 47.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency heating device having an additional heating function.

[0002]

2. Description of the Related Art Generally, in a high-frequency heating device such as a microwave oven, when a predetermined heating menu is selected by an operation menu key of either auto or manual, for example, a predetermined heating amount automatically or manually set correspondingly. A heating control system is employed which drives a magnetron or a heater according to a heating time and a heating pattern to perform heating.

In a high-frequency heating device equipped with a weight sensor, when the range heating setting operation using the auto menu key is performed, the weight of the object to be heated on the turntable is first detected in response to the range heating setting operation. , A suitable magnetron output for microwave heating is automatically set in a predetermined heating pattern according to the detected weight, and a range corresponding to the heating pattern within the set time is set by the set magnetron output (heating amount). It is designed to be heated to finish to a desired finish.

However, the weight detection system for the object to be heated by the weight sensor measures the weight of the object to be heated by the entire weight including the weight of the object-to-be-heated container itself such as a cooking dish. With respect to the weight of the container itself, it is general that the standard map weight assumed at the time of product design is taken into consideration and the data map value is mapped smaller by the same weight.

However, the cooking plate actually used at home does not always have the standard weight assumed at the time of designing, and there are considerable variations.

Therefore, as described above, a considerable variation occurs depending on the weight of the cooking dish used for the magnetron output set by using the map data, and an appropriate heating amount corresponding to the net weight of the object to be heated is generated. Setting is difficult. As a result, poor heating often occurs.

On the other hand, in addition to the problem of insufficient heating due to the inaccuracy of weight measurement as described above, there are also cases where the user feels insufficient heating at the finishing level of the auto menu due to his favorite problem.

Therefore, in such a case, conventionally, an appropriate heating time is set again by manual operation, and additional heating is performed while the door is opened and the finished state is confirmed to compensate for the insufficient heating.

[0009]

However, this method requires another troublesome manual operation, is very inconvenient, and has a problem that the original convenience of the auto menu is not utilized.

[0010]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems of the prior art, and includes heating means for heating an object to be heated by a microwave output or a heater output, and the heating means. Heating time setting means for setting the heating time of the means, heating output setting means for setting the heating output of the heating means, and heating set by the heating output setting means within the heating time set by the heating time setting means In a high-frequency heating device comprising heating output control means for controlling the output of the heating means according to the cooking process so that an output can be obtained, the cancel key has not been turned on after completion of heating of a predetermined cooking menu. Is provided with an additional heat time setting means for setting a predetermined additional heat time and an operation key for operating the additional heat time setting means. Than it is.

[0011]

As described above, the high frequency heating apparatus of the present invention is
First, as its basic configuration, a heating means for heating an object to be heated by a microwave output or a heater output, a heating time setting means for setting a heating time of the heating means, and a heating output for setting a heating output of the heating means. Setting means and heating output control means for controlling the output of the heating means according to the cooking process so that the heating output set by the heating output setting means is obtained within the heating time set by the heating time setting means. When a predetermined heating menu is selected by, for example, the auto menu key, the magnetron or heater is driven by a predetermined heating amount, heating time, and heating pattern that are automatically set correspondingly. The heated object is heated.

On the other hand, an additional heat time setting means for setting a predetermined additional heat time on condition that the cancel key is not turned on after the heating of the predetermined cooking menu is completed, and the additional heat time setting means. Since it is provided with an operation key for activating, it is possible to easily realize the additional heat similar to the conventional manual operation only by one-touch operation of the operation key when it is recognized that heating is defective. become able to.

[0013]

As described above, according to the high frequency heating apparatus of the present invention, it is possible to control additional heat like an auto menu.
The additional heat operation becomes very easy.

[0014]

【Example】

(1) First Embodiment FIGS. 1 to 4 show the configuration and operation of a high-frequency heating device (microwave oven) having an additional heating function according to the first embodiment of the present invention.

First, FIGS. 1 and 2 show the overall structure (housing structure) of the high-frequency heating apparatus 1, in which a heating chamber (food storage) 2 is provided inside the housing 1a. There is. A turntable 3 for placing a food item is rotatably installed on the bottom of the heating chamber 2. A door 16 having a finder portion 17 is attached to the front opening 19 of the heating chamber 2 so as to be vertically openable and closable. A door switch 18 is provided on the main body side corresponding to the door 16.

On the other hand, the heating chamber 2 on the front side of the housing 1a.
An operation panel section 26 for operating and controlling various functions of the high-frequency heating device is installed on the right side of the opening 19 of the. For example, as shown in detail in FIG. 2, the operation panel unit 26 is arranged such that the display unit is first displayed from the upper side to the lower side.
(Liquid crystal display) 34, heating time setting key for manual menu (27a for 5 minutes, 27b for 1 minute, 27c for 10 seconds, 3c)
2 keys), manual heating key group (4 keys: raw thawing, toaster, pizza heating, porridge) 2
9, an automatic heating key group (consisting of four keys for sake, canned toast, frozen toast, and cooked rice) 30, a manual menu designating key 41, and an auto menu designating key 42 are appropriately arranged with good operability.

Further, as is apparent from FIG. 1, below the finder 17 of the door 16, the finishing adjustment key 37, the toast key 30c, the defrosting key 30b, the warm / start key 30a, the cancel key 28, the range from the left to the right. 1
A door key group 38 such as the minute heating key 47, which is particularly frequently used, is provided.

The display section 3 of the operation panel section 26 is
For example, when various operation keys described above are turned on, various selection setting states are displayed at 4.

The operation panel section 26 and the above-mentioned door key group 38 are connected to each other, and for example, as shown in FIG. 3, a control unit 20 for controlling a microwave oven, a data bus and a control bus, which is mainly composed of a microcomputer. The input / output signals can be freely transmitted / received by being connected via.

Further, as is apparent from FIG. 3, in the housing 1a of the high-frequency heating device 1, the object 40 to be heated on the cooking plate 5 placed on the turntable 3 in the heating chamber 2 is heated. Magnetron 13 for heating by radiating and absorbing microwaves in the chamber, a heater 36 and a heater circuit 35 for heating an object to be heated in the heating chamber 2 by irradiating infrared rays if necessary, and a fan 12a for ventilation.
The fan motor 12 and the fan motor 12 are installed as illustrated. A turntable motor drive circuit 2 is provided between the control unit 20 and the turntable motor 4.
4 also includes the control unit 20 and the fan motor 12
A fan motor drive circuit 25 is provided between the control unit 20 and the magnetron 13, and a magnetron drive unit 22 is provided between the control unit 20 and the magnetron 13. The turntable motor 4 is provided with a weight sensor 36, and the detection value K detected by the weight sensor 36 is used to determine the amount (weight) of the food. Further, reference numeral 37 is a power supply circuit, which supplies the power supply voltage from the AC power supply 100 (V) to the magnetron drive unit 22 and the turntable motor drive circuit 2.
4, distributed to the fan motor drive circuit 25.

The fan 12a is used for ventilation in a simmering state, and is also used for exhausting humidity inside the chamber before execution of heating during automatic "warming" continuous heating, for example.

On the other hand, as shown in the figure, an outside air introduction port 8 is formed on one side wall 31 side of the housing 1a and an exhaust port 11 is formed on the other side wall 32 side thereof, and the heating chamber 2 between them is formed. Ventilation ports 9 and 10 are formed in both side walls 6 and 7, respectively. The above-described fan 12a driven by the fan motor 12 is interposed between the outside air introduction port 8 and the ventilation port 9, and the outside air introduced through the outside air introduction port 8 is indicated by an arrow in the figure. As shown in the figure, first, the magnetron 13 is cooled, and then odors and water vapor during cooking are absorbed through the upper part of the heating chamber 2 and discharged from the exhaust port 11 side. The ventilation port 10 and the exhaust port 11
While being formed in the duct portion 14, a humidity sensor 15 is installed in the middle of the duct portion 14 so as to face the inside of the duct portion 14 and detect the humidity during heating, boiling, or heat retention. ing. The output signal Vs of the humidity sensor 15 is sent to the control unit 20 via a predetermined detection unit 23.
It is designed to be input and stored in memory.

In the control unit 20, for example, during automatic "warming" cooking, the amount of steam discharged from the object 40 to be heated by the humidity sensor 15 is a predetermined set value Vs _1.
When the above is detected, the magnetron drive unit 22 is turned off to stop the drive of the magnetron 13. On the other hand, when it is detected that the object to be heated is in a boiling state in the case of the auto "simmering menu" or the like, the heating output of the magnetron 13 in the subsequent simmering step is automatically adjusted according to the level, for example, automatically. Is adjusted to achieve a proper simmering heating state that prevents spillage, while keeping the warming output set according to the output of the weight sensor 36 according to the detected humidity in the warming state after completion of cooking, if necessary. Is controlled more finely.

Further, the range 1 minute heating key 47 of the door key group 38 is used to execute the additional heat of the previous cooking menu after the completion of the automatic heating and cooking.

Next, the contents of the additional heat control after the completion of the automatic menu cooking by the control unit 20 of the present embodiment will be described in detail with reference to the flowchart of FIG.

That is, first, in step S ₁ , heating control of the auto menu as described above (for example, warming, milk warming, sake canning, thawing, toast, etc.) is executed, and cooking is performed when the set heating time elapses. Upon completion, it is subsequently determined in step S ₂ whether or not the cancel key 45 in the door key group 38 described above has been turned on.

As a result, if YES is determined, the process proceeds to step S ₃ , and it is determined whether or not the range 1 minute heating key 47 in the door key group 38 is turned ON.

Here, the range 1 minute heating key 47 is turned ON /
The OFF determination is different from the ON operation determination for the purpose of adding heat to the previous cooking to be described later, and the range 1-minute heating key 47 is used to allow the user to separately heat any of the menu items after the previous cooking is finished. This is a determination as to whether or not the operation is an ON operation in the case of simply heating and cooking an object in a short time without going through a complicated setting operation. In that case, if the determination result is ON (YES), the following step S ₄
Then, it is determined from the detection value of the above-described weight sensor 36 at that time whether or not the object 40 to be heated is actually placed on the turntable 3 in the heating chamber 2, that is, whether or not there is a weight error. If the result is YES as a weight error, the process proceeds to step S ₁₄ to display a weight error message on the display unit 34 (no object to be heated), and then at step S ₁₅ , all heating control operations are stopped.

On the other hand, when it is determined that the object 40 to be heated is definitely placed on the turntable 3 instead of the weight error as described above, it is determined in step S ₅ that the full power (for example, 500 W) is applied for 1 minute. run the microwaved drives the magnetron 13, when the set time of 1 minute is determined that the elapsed has elapsed in step S _6, step S _7, the process proceeds to S _8, successively cancel key 45 is turned oN again Whether or not the cancel key 45 has been turned on again to shift to the heat retention state, the cancel key 45 is pressed again, and cooking for one minute of heating is completed, and When the heat retention time has also passed, the control is ended thereby.

On the other hand, if the first ON / OFF determination of the cancel key 45 immediately after the end of the automatic heating in step S ₂ is NO, then the process proceeds to step S ₉ to see if the heat retention control is currently being performed. determines whether, as a result, when the nO not being kept in simple one step S ₃ described above 1
Yes, while keeping warm while moving to the routine for minute heating control
When further proceeds to step S ₁₀ of, after completion of the previous cooking, once opened door 16 to check the finished state of the object to be heated 40 in the heating chamber 2 again door 16 closed It is determined whether or not the time is within 1 minute after the operation.

As a result, in the case of NO, the control proceeds to step S ₃ and subsequent steps as in the case where the temperature is not maintained.

On the other hand, YE within 1 minute after the YES door is closed
When S, assuming additional heating due to poor heating, proceed to step S ₁₁ and actually press the range 1 minute heating key 4 described above.
It is determined whether 7 is turned on for the purpose of additional heat.

As a result, if YES, further step S
Proceed to step ₁₂ , determine the weight error for confirming the object to be heated for the same reason as in the case of step S ₄ described above, and then perform the step only when NO determination is not a weight error (when the object to be heated exists). proceed to S _13, the last executed in step S ₁
The output is controlled to a heating output level (wattage) with a duty value higher by one step than the heating amount setting level (up to that time) (strong / medium / weak) to perform additional heat for 1 minute. The control is
It continues until the above 1 minute has passed, the above 1 minute has passed,
Also, in step ₂ , it is confirmed that the cancel key 45 has been pressed, and when the heating key 47 for the range 1 minute is not pressed again, the processing ends, and finally, the cancellation key 45 ON judgment and heat retention judgment are completed again. To be done.

As described above, in the high frequency heating apparatus of this embodiment, after the predetermined cooking is completed, the cancel key 45 is not turned on, and the additional heating range is heated for 1 minute within 1 minute after the door 16 is opened and closed. When the key 47 is turned on, the finish setting level which is one rank higher than the finish level of the previous time, for example, if it is weak, it is medium, if it is medium, it is strong, and if it is stronger, it is strong + α (where α is Set each of the correction map value for increasing the heating time or heating duty for one rank),
Appropriately perform additional heat at the set level.

Therefore, the additional heat at the time of heating failure can be easily realized by only one-touch operation of the range 1 minute heating key 47.

On the other hand, unlike the above case, even after the previous cooking is completed and the cancel key 45 is once pressed to completely complete the previous cooking, a predetermined time (normal setting data is stored in the memory When the heating 1 minute heating key 47 for additional heat is pressed within the maximum heating time of 15 minutes), a simple 1 minute heating operation is performed at the set output level until then.

Therefore, the range 1 minute heating key 47 is used not only for additional heat, but for a small amount of another menu after cooking is completed.
It can be effectively used for short-time heating.

(2) Second Embodiment FIGS. 5 and 6 show the structure and operation of the high frequency heating apparatus according to the second embodiment of the present invention.

In this embodiment, for example, as shown in FIG. 5, the range 1-minute heating key 47 (see FIG. 1) of the first embodiment is changed to the slight heating key 46, and the cancel key 45 is set when the auto menu cooking is completed. When the slight heating key 46 is pressed without being pressed, it is judged that there is a request for additional heat due to insufficient heating, and the additional heat time t to be executed correspondingly is set to the cooking menu as in the first embodiment. Rather than setting it to 1 minute mechanically regardless of the content, it was corrected by the optimum setting time correction coefficient K that is individually set according to the type of cooking menu and set individually. It is characterized by.

The structure and operation of the additional heat time setting control system according to the cooking menu of the high frequency heating apparatus of the second embodiment will be described in detail below with reference to the flow chart shown in FIG.

That is, first, in step S ₁ , the above-described automatic menu heating control (warming, milk warming, sake canning, thawing, toast, etc.) is executed, and when the set heating time elapses and cooking is completed. Then, in step S ₂ , it is determined whether or not the cancel key 45 in the door key group 38 described above has been turned on.

As a result, if YES is determined, all the cooking condition setting states of the auto menu heating in step S ₁ described above are reset as usual, and the magnetron 13 is turned on.
The control is ended by setting it to FF.

On the other hand, when the cancel key 45 is judged to be NO without being turned on, the routine proceeds to step S ₃ , where it is judged whether or not the above-mentioned slight heating key 46 is pressed.
The determination is repeated together with the ON / OFF determination of the cancel key 45 for a certain period of time (for example, 15 minutes after the above-described cooking is completed).

As a result, YES (slight heating key 4
When (6 is turned on), the process proceeds to the determination operation of the previous (step S ₁ ) menu in steps S ₄ , S ₆ , S ₈ , and S ₁₁ , and whether the previous cooking menu was “warm” or “warm milk” ",""Sakecan" or "Thaw" is determined in order.

After the determination of each menu, if any of the determination results is YES, step S
_The additional heat time setting factors Ka (when warming), Kb (when warming milk), Kc (when drinking sake), and Kd (when thawing) corresponding to the menu determined in ₅ , S ₇ , S ₉ , and S ₁₂ Read from the map (ROM) and set.

After setting the coefficient K, when the determined previous menu is other than "decompress",
In step S ₁₀ , the output W of the magnetron 13 is set to W = W
₁ = 500 (watts) while setting the full power of the same magnetron output W W = W ₂ = 100 (watts), each additional heat time step S ₁₄ after having set the low power when the "thaw" t Proceed to the setting operation.

Then, in step S ₁₄ , the basic heating time is set.
By multiplying t ₁ by the setting coefficient K (K = Ka to Kd) respectively set in steps S ₅ , S ₇ , S ₉ and S ₁₂ , the optimum additional heating time t (t = T ₁ · K).

After that, the process proceeds to step S ₁₅ to start the additional heat by the high frequency output at the set output W ₁ or W ₂ .
該追heated state until elapse of the step S ₁₆ in the above menu corresponding to the set added heat set time t is determined is continued.

[0049] Then, when the set time t has elapsed, to finish adding thermal control and then add heat-end processing in step S _17.

As described above, in the high-frequency heating apparatus of this embodiment, although the slight heating key 46 is a single operation key, it can function as a plurality of slight heating time setting keys corresponding to each of a plurality of cooking menus. Therefore, since it is possible to set an appropriate additional heat time corresponding to each cooking menu, when the additional heat time t (t = 1 minute) is uniformly set regardless of the cooking menu as in the first embodiment. Compared with this, there is an advantage that the finished state is good.

(3) Third Embodiment FIG. 7 shows the configuration and operation of the additional heat control system of the high frequency heating apparatus according to the third embodiment of the present invention.

In any of the high frequency heating devices of the first and second embodiments, it is necessary to newly provide operation keys (range 1 minute heating key 47, slight heating key 46) exclusively for additional heat in any case. Therefore, the cost increases accordingly.

The high frequency heating apparatus of the present embodiment is constructed in view of this point, and as shown in the flow chart of FIG. 7, the additional heating function substantially similar to that of the above-mentioned first embodiment is added to the conventional "warming / start". This is realized by utilizing (also serving as) the key 44.

That is, first, in step S ₁ , the above-described automatic heating control (warming, thawing, toasting, etc.) is executed, and when the set heating time elapses and the cooking is completed, then in step S ₂ , It is determined whether or not the cancel key 45 in the above-described door key group 38 has been turned on.

As a result, if YES is determined, the process proceeds to step S _{8 as} in the conventional normal control, and all the cooking condition setting states of the auto menu heating described above are reset and the magnetron 13 is turned off to perform control. Finish.

On the other hand, when the cancel key 45 is determined to be NO without being turned on, the process further proceeds to step S ₃ to determine again whether or not the above-mentioned "warming / start" key 44 is pressed. The determination is repeated for a fixed time (for example, 15 minutes after completion of cooking).

[0057] and, as a result, comes to YES, then proceeds to step S _4, the above-mentioned "warm start" key 4
It is determined whether or not 4 is turned on before 1 minute has elapsed after the door 16 was opened and closed.

As a result, if YES, that is, the cooking of the predetermined menu in step S ₁ is once completed, the door 16 is once opened and the finish state is confirmed. "warm-step S" key 44 when it is found to have oN operation the, first the previous finish setting level of the step S ₁ proceeds to step S ₅ but in an attempt to re-heating within one minute again closed the door 16 Read (strong / medium / weak). And then
The finishing level one step higher than the previous finishing setting level read in step S ₆ , for example, medium if weak, strong if medium, strong + α if stronger.
(However, α is set to one step heating time or a correction map value for increasing the heating duty), and in the subsequent step ₇ , additional heat is executed at the set level.

On the other hand, when the determination in step S ₄ that the above logical product condition is not satisfied is NO, the process shifts to the normal control in step S ₈ described above.

As described above, in the structure of the high-frequency heating apparatus of this embodiment, it is already present without separately providing the range 1-minute heating key 47 and the slight heating key 46 as in the first and second embodiments. The "warm / start" key 44 can be used to realize a substantially similar one-touch operation of additional heating. Therefore, there is an advantage that the cost does not increase as in the case of providing an independent key for additional heat.

[Brief description of drawings]

FIG. 1 is a front view of a door panel portion showing a housing portion structure of a high-frequency heating device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a structure of a main operation panel portion inside a door panel of the device.

FIG. 3 is a block diagram mainly showing a configuration of a control circuit unit of the device.

FIG. 4 is a flowchart showing a control operation during additional heat cooking by the control unit of the same apparatus.

FIG. 5 is a front view showing a switch key arrangement structure of a door panel portion of a high-frequency heating device according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing a control operation at the time of additional heat cooking by the control unit of the apparatus.

FIG. 7 is a flowchart showing a control operation at the time of additional heat cooking by the control unit of the high-frequency heating apparatus according to the third embodiment of the present invention.

[Explanation of symbols]

1a is a housing part, 2 is a heating chamber, 3 is a turntable, 5 is a cooking plate, 13 is a magnetron, 15 is a humidity sensor, 20
Is a control unit, 22 is a magnetron drive unit, 36 is a weight sensor, 38 is a door key group, 44 is a warm / start key, 45 is a cancel key, 46 is a slight heating key, and 47 is a range 1 minute heating key.

Claims (1)

[Claims] 1. A heating means for heating an object to be heated by a microwave output or a heater output, a heating time setting means for setting a heating time of the heating means, and a heating output setting means for setting a heating output of the heating means. And heating output control means for controlling the output of the heating means according to the cooking process so that the heating output set by the heating output setting means is obtained within the heating time set by the heating time setting means. In the high-frequency heating device, the additional heat time setting means for setting a predetermined additional heat time on condition that the cancel key is not turned on after the heating of the predetermined cooking menu is completed, and the additional heat time setting means are operated. A high-frequency heating device, characterized in that it is provided with an operation key for operating.