JP2000234741A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the total heating amount for a cooked object from becoming excessive and insufficient. SOLUTION: A high-frequency output control means 42 which controls the actuation of a high-frequency generating means 5 in the unit of a prescribed control period and the high-frequency outputting level of the means 5 by changing the turning-on time of the means 5 compares the duration of actuation of the means 5 until a target output level is changed in the control period at the changing time when the target output level instructed from a target output instructing means 41 is changed during the turned-on time with the turned-on time corresponding to the changed target output level. When the actuating duration is shorter than the turned-on time, the control means 42 stops the actuation of the means 5 after waiting until the duration of actuation of the means 5 reached the turned-on time in the control period at the changing time and, when the time obtained by subtracting the turned-on time from the control period elapses after stoppage, starts to control the output level of the means 5 in accordance with the changed target output level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker for heating food by high frequency, and more particularly to a heating cooker having a function of performing automatic cooking with a change in output level of high frequency.

[0002]

2. Description of the Related Art Conventionally, in a cooking device that heats a food by high frequency, such as a microwave oven or a combined cooking device in which a microwave oven and a gas heating oven are combined, various cooking sequences in accordance with the cooking contents. Are set in advance and have a function of performing automatic cooking according to the cooking sequence.

For example, in a cooking sequence for performing thawing cooking, before starting thawing, the weight of a frozen product placed in a heating chamber of a heating cooker is recognized by a weight setting switch or a weight detection sensor. The total amount of heating required in the thawing cooking is determined according to the weight of the food.

[0004] In the thawing cooking, the output level of the high frequency wave is not constant, but is controlled so as to gradually decrease as the thawing progresses. Here, changing the frequency of the output level, generally as shown in FIG. 8 (a), a high frequency of occurrence time in the control period T _INT (ON time) to change the T _ON, in the control period T _INT This is done by changing the total amount of high frequency output.

[0005] In addition, when the output level of the high frequency is changed,
It is determined according to the elapsed time from the start of thawing cooking. Conventionally, the process of changing the output level of the high frequency is performed as shown in FIG.
(B) of, as shown in, T control period (for when there is an output level of the change instruction (t _1, the t ₂₎ of
₁ and T ₃ ), the ON time T _ON is changed in accordance with the output level instruction after the change.

However, when the high-frequency output level is changed by the processing method shown in FIG. 8 (b), the present inventors have found that the actual total heating amount is smaller than the total heating amount set in automatic cooking such as thawing cooking. In some cases, the amount of heating increases and the heating of the food becomes excessive, or conversely, the amount of heating of the food becomes insufficient due to the actual total heating being smaller than the total heating set in the automatic cooking. Was found.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and has as its object to provide a heating cooker in which the total heating amount of cooked food is prevented from being excessive or insufficient. I do.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and has a heating chamber for accommodating a cooking product, and a high-frequency generator for generating a heating high-frequency wave introduced into the heating chamber. Means and the operation of the high-frequency generating means are controlled in a predetermined control cycle unit, and the high-frequency generating means is operated for a predetermined ON time from the start of the control cycle, and from the end of the lapse of the ON time. During the OFF time, which is the time until the end of the control cycle, the high-frequency generation means is stopped, and the output level of the high-frequency generation means is controlled by changing the ON time according to a predetermined target output level. The present invention relates to an improvement in a heating cooker comprising high-frequency output control means and target output level indicating means for instructing the high-frequency output control means on the target output level in accordance with a predetermined cooking sequence. .

[0009] In the conventional cooking device, when the target output level indicated by the target output level instruction means changes, the high frequency output control means waits for the end of the control cycle at the time of the change. The ON time is changed according to the changed target output level. However, according to such a conventional changing method, when the target output level decreases during the ON time, the target output level before the reduction is determined in spite of the decrease in the target output level. The operation of the high frequency generating means is continued until the ON time elapses. For this reason, the output of the high-frequency generator does not immediately decrease, and the total amount of heating of the cooked food becomes excessive.

Further, when the target output level increases during the ON time, despite the increase in the target output level, an O corresponding to the target output level before the increase is obtained.
The operation of the high frequency generating means is stopped when N time has elapsed, and the high frequency generating means is in a stopped state until the control cycle at that time has elapsed. For this reason, the output of the high-frequency generator does not immediately increase, resulting in a shortage of the total amount of heating of the food.

Therefore, in order to prevent such inconvenience from occurring, the first embodiment of the present invention is directed to a high-frequency output control unit, wherein the high-frequency output control unit is instructed by the target output level instruction unit during the ON time. When the target output level changes, the operation continuation time of the high-frequency generating means up to the change in the control cycle at the time of the change is compared with the ON time according to the target output level after the change, and the operation continuation is continued. When the time is shorter than the ON time, the operation of the high frequency generator is stopped after the operation continuation time of the high frequency generator in the control cycle reaches the ON time, and after the stop, the operation of the control cycle is stopped. An output control of the high-frequency output means according to the changed target output level is started after a lapse of a time obtained by subtracting the ON time.

According to the present invention, when the target output level instructed by the target output level instructing means is reduced during the ON time, the operation continuation time until the decrease is equal to the time after the decrease. The O according to the target output level
If the time is less than N hours, the operation of the high frequency generation means is stopped when the ON time has elapsed. Accordingly, it is possible to prevent the output level of the high-frequency output unit from rapidly decreasing in accordance with the decrease in the high-frequency output level, and to prevent the total amount of heating of the food from becoming excessive.

When the target output level indicated by the target output level instructing means increases during the ON time, the operation continuation time until the change corresponds to the target output level after the change. If the time is shorter than the ON time, the operation time of the high frequency generation means is extended until the ON time elapses. Thus, it is possible to prevent the output level of the high-frequency output unit from rapidly increasing in response to the increase in the high-frequency output level, and to prevent the total heating amount for the cooked food from becoming insufficient.

In the case of the above-described conventional method for changing the high-frequency output level, when the target output level decreases during the ON time, the operation of the high-frequency generation means is continued until the target output level decreases. Even if the continuation time has already exceeded the ON time according to the target output level after the decrease, the ON according to the target output level before the decrease.
The operation of the high-frequency generating means is continued until time elapses. For this reason, there is a disadvantage that the output of the high-frequency generating means does not immediately decrease and the food is excessively heated.

Therefore, in order to prevent such inconvenience from occurring, a second embodiment of the present invention is directed to a high frequency output control unit in which the high frequency output control unit is instructed by the target output level instruction unit during the ON time. When the target output level has decreased, the operation duration of the high-frequency generation means until the decrease in the control cycle at the time of the decrease is compared with the ON time corresponding to the target output level after the decrease, and the operation continuation is performed. If the time is equal to or longer than the ON time, the operation of the high-frequency generation means is immediately stopped, and after the stop, a time obtained by subtracting the operation continuation time from the control cycle has elapsed, the target output level after the change is changed. The control of the output level of the high-frequency output means in response to the control is started.

According to the present invention, when the target output level instructed by the target output level indicating means decreases during the ON time, the operation continuation time of the high-frequency generating means until the decrease is obtained. If the ON time according to the target output level after the decrease has been exceeded, the operation of the high frequency generating means is immediately stopped. Accordingly, it is possible to prevent the output level of the high-frequency output unit from being rapidly decreased in accordance with the decrease in the target output level, and to prevent the total amount of heating of the food from becoming excessive.

[0017] Further, there is provided a weight detecting means for detecting the weight of the food placed in the heating chamber, and the cooking sequence is determined according to the weight of the food detected by the weight detecting means. It is characterized by.

According to the weight detecting means, since the weight of the food can be accurately detected, the total heating amount of the food in the cooking sequence determined according to the detected weight and the high-frequency generating means can be determined. The setting of the change timing of the output level is also performed in more detail. Therefore, by changing the output level of the high-frequency generating means according to the methods of the first and second embodiments of the present invention described above, according to the cooking sequence, and in accordance with the detection accuracy of the weight detecting means. In addition, it is possible to accurately control the total amount of heating of the food.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of a composite cooker which is a heating cooker of the present invention, FIG. 2 is a control block diagram of the composite cooker shown in FIG. 1, and FIGS. 3 to 6 are composite cookers shown in FIG. 7 is a control flowchart of the output level of the heating high frequency in FIG. 7, FIG. 7 is an explanatory diagram showing a transition state of the output level of the heating high frequency of the combined cooking device shown in FIG. 1, and FIG. It is explanatory drawing which showed the method of changing the output level of the high frequency for heating in the conventional cooking device.

Referring to FIG. 1, a composite cooker 1 according to the present invention.
Is for heating and cooking the food 4 placed on the turntable 3 in the heating chamber 2, and as a heating source, a magnetron 5 for generating a high frequency for heating (corresponding to a high frequency generating means of the present invention). And a gas burner 6 for generating hot air. The composite cooker 1 performs high-frequency heating cooking in which the magnetron 5 is operated alone, hot-air heating cooking in which the gas burner 6 is operated alone, and combined heating cooking in which both the magnetron 5 and the gas burner 6 are operated.

Fuel gas is supplied to the gas burner 6 via a gas supply pipe (not shown).
The combustion air drawn in is supplied. And
The air heated by the combustion of the gas burner 6 is sucked by the circulation fan 8 through the air passage 9, and the hot air is sent to the heating chamber 2. Further, the combustion exhaust gas of the gas burner 6 is discharged via the exhaust stack 10.

The turntable 3 is driven to rotate by a synchronous motor 12 via a turntable base 11,
The circulation fan 8 is driven to rotate by a circulation fan motor 14.

Further, the combined cooker 1 has an open / close switch 16 for detecting the open / closed state of the door 15 and the temperature in the heating chamber 2 (used for controlling the temperature in the heating chamber 2 in hot air heating cooking and combined heating cooking). A temperature sensor 17 for detecting
A humidity sensor 18 for detecting the level of water vapor emitted from the food 4 (used to determine the degree of heating of the food 4), and a weight sensor for detecting the weight of the food 4 placed on the turntable 3. 19 and an operation unit 20 instructed by the user to set cooking conditions and start / stop cooking. The operation of the composite cooker 1 is controlled by the control unit 21.

Next, referring to FIG.
Reference numeral denotes an electronic unit including a CPU, a ROM, a RAM, and the like, and operates by power supplied from the power supply circuit 22. The control unit 21 operates in response to the operation of the cooking timer encoder 24, the cooking mode selection switch 25, the temperature setting switch 26, the cooking menu selection switch 27, the cooking start switch 28, and the cancel switch 29 provided in the operation unit 20. , The operation control of the turntable 3 (see FIG. 1) by the synchronous motor 12, the operation control of the magnetron 5 by the magnetron drive circuit 23, the circulation fan motor 14 for performing hot air heating, the burner operation control unit 31, and the igniter 32. Perform control.

The control unit 21 includes a cooking sequence setting means 40 for determining a cooking sequence for automatic cooking in accordance with an instruction from the operation unit 20, and a high-frequency output level (a target output level) of the magnetron 5 according to the cooking sequence. ), The operation of the magnetron 5 is controlled via the magnetron drive circuit 23 in accordance with the target output level instruction from the target output level instruction means 41, and the output from the magnetron 5 is output. High frequency output control means 42 for controlling the output level of the high frequency.

The burner operation control unit 31 includes a gas governor 37.
And a plurality of solenoid valves 33 and a solenoid 34 for driving these solenoid valves 33, and adjusts the flow rate of fuel gas supplied to the gas burner 6. The igniter 32 ignites the gas burner 6 by generating a spark discharge through the spark electrode 35.

The cooking timer encoder 24, the cooking mode selection switch 25, and the temperature setting switch 26 provided in the operation unit 20 are operated when performing manual cooking. When performing manual cooking, the user sets the cooking time with the cooking timer encoder 24, selects one of the above-described high-frequency heating cooking, hot-air heating cooking, and composite heating cooking with the cooking mode selection switch 25, and performs hot-air heating. When cooking is selected (when performing oven cooking), the cooking temperature in the heating room is set by the temperature setting switch. By operating the cooking start switch 28 after performing these selections and settings, cooking according to the selected and set contents is performed.

The operation unit 20 has a display unit 36. The display unit 36 displays the cooking time set by the cooking timer encoder 24, the cooking temperature set by the temperature setting switch 26, and the like. After that, the remaining time until the end of cooking is displayed.

The cooking menu selection switch 27 is for performing automatic cooking, and is operated by a user.
A cooking menu such as "sweets", "yumonono", "thaw", "warm", etc. is selected. When one of the cooking menus is selected by the user and the cooking start switch 28 is operated, the control unit 21 starts automatic cooking according to the selected cooking menu.

Next, the procedure for executing automatic cooking by the control unit 21 will be described by taking as an example a case where "thaw" is selected by the cooking menu selection switch 27.

The user places the cooked (frozen) 4 in the heating chamber 2
When the user puts on the turntable 3, closes the door 15, selects “thawing” with the cooking menu selection switch 27, and operates the cooking start switch 28, the control unit 2
1 starts execution of "thaw" automatic cooking.

In the "thawing" automatic cooking, only the high frequency heating by the magnetron 5 is performed on the food 4 and the hot air heating by the gas burner 6 is not performed. The “thawing” automatic cooking is executed by changing the high-frequency output level of the magnetron 5 into three stages of 300 W, 200 W, and 100 W.

In the "thaw" automatic cooking, first, the cooking sequence setting means 40 provided in the control unit 21
Determines the total execution time of the “thaw” automatic cooking according to the weight of the food 4 detected by the weight sensor 19. Then, the cooking sequence setting means 40 divides the total execution time into three at a predetermined ratio, and executes the first stage for performing high-frequency heating at an output level of 300 W and the second stage for performing high-frequency heating at an output level of 200 W. Execution time,
And the execution time of the third stage for performing high-frequency heating at an output level of 100 W is determined. In this way, the cooking sequence setting means 40 sets the cooking sequence of executing the first stage → the second stage → the third stage in this order, and instructs the target output level instructing means 41.

The target output level instructing means 41 sets the high frequency target output level of the magnetron 5 to 550 W, 300 W, 200 W, 100 W, and 0 according to the cooking sequence instructed by the cooking sequence setting means 40.
Instructs the high-frequency output control means 42 in five stages of W (operation stop).

That is, in the first stage, the target output level is set to 300 W, in the second stage, the target output level is set to 200 W, and in the third stage, the target output level is set to 100 W. Then, when the third stage is completed, the instruction of the target output level is set to 0 W, whereby the “thawing” automatic cooking is completed.

Next, the high-frequency output control means 42 adjusts the high-frequency output level of the magnetron 5 in units of a fixed control cycle T _INT (15 seconds) as shown in FIG.
Control is performed by changing the time (ON time) T _ON for operating the magnetron 5. That is, as shown in (a) of FIG. 8A, the ON time T _{ON is set} to 15 seconds, 8.5 seconds, 6 seconds,
By reducing it to 3.5 seconds, the output level of the high frequency in the control cycle T _INT becomes 550 W, 300 W, 200 W,
Switch to four stages of 100W. (Note that in the calculation of the output of the magnetron 5, the calculation is not included because the output of the magnetron 5 is in an unstable state for one second from the start of operation of the magnetron 5.) As described above, the target output level From the instructing means 41 to the high frequency output controlling means 42
The change timing of the instruction of the target output level is determined by the elapsed time from the start of the execution of the “thawing” automatic cooking according to the cooking sequence. During the time (T _ON ), the target output level may be changed.

As described above, during the ON time, the target output level
Has been changed, conventionally, as shown in FIG.
As described above, the control cycle (in which the target output level is changed)
Is T ₁, Then T_Three), The next control cycle (in which T_Two,
Then T_Four), ON time T_ONIs the target output level after the change.
Had been changed accordingly.

Then, in this case, as shown in FIG. 8B, when the target output level decreases (300 W →
200 W), in the control period T _1, despite the target output level drops, lowering the previous target output level (3
00W), the operation of the magnetron 5 is continued until the ON time (8.5 seconds) elapses. for that reason,
"Thawing" than the total heating required for automatic cooking,
In some cases, the total amount of heating actually output was excessive.

As shown in FIG. 8B, when the target level rises (200 W → 300 W),
In the control period T _3, despite the target output level is increased, the operation of the magnetron 5 is stopped when the ON time corresponding to the increase before the target output level (200 W) (6 seconds) has elapsed. For this reason, the total heating amount actually output may be less than the total heating amount required in the “thaw” automatic cooking.

The high-frequency output control means 42 uses the procedure shown in the flowcharts of FIGS. 3 to 6 to control the high-frequency output level of the magnetron 5 in order to prevent such an excessive or insufficient total heating amount. Is being changed. Hereinafter, the operation of the high-frequency output control means 42 will be described with reference to the flowcharts shown in FIGS.

FIG. 3 shows a main routine for receiving a target output level instructed by the target output level instructing means 41.
The loop of EP4 is executed, and the target output level instructing means 41
The operation of the magnetron 5 is controlled via the magnetron drive circuit 23 in accordance with the instruction from.

From the target output level instructing means 41 to 550
When there is an instruction of the target output level of W, STEP1
Branching to STEP10, the high-frequency output control means 42
Is connected to the magnetron 5 via the magnetron driving circuit 23.
Is turned ON (operation starts). Then, in step 11, while the target output level is 550 W, the magnetron 5 is continuously operated, and when the target output level becomes other than 550 W, the process proceeds to STEP 12 and the magnetron 5 is turned off.
FF (stop operation). This STEP 10 to STEP 1
By the process 2, the magnetron 5 is continuously operated as shown in FIG.

From the target output level instructing means 41,
When a target output level of 300 W is indicated, ST
Branching from EP2 to STEP20, the high-frequency output control means 42 sets the ON time T _ON to 8.5 seconds corresponding to the output level 300W, and in STEP21, the subroutine for controlling the operation of the magnetron 5 for one control cycle. (Less than,
1 control cycle subroutine). The details of the one control cycle subroutine will be described later.

From the target output level instructing means 41,
When the target output level of 200 W is instructed, ST
Branches from EP3 in STEP 22, the high-frequency output control unit 42 sets to 6.0 seconds in accordance with the output level 200W the ON time T _ON, performing the first control cycle subroutine in subsequent STEP 23.

From the target output level instructing means 41,
When a target output level of 100 W is instructed, ST
Branches from EP4 in STEP 24, the high-frequency output control unit 42 sets to 3.5 seconds in accordance with the output level 100W the ON time T _ON, performing the first control cycle subroutine in subsequent STEP 25.

Note that the target output level is 550 W,
If it is not any of 300W, 200W, and 100W, that is, if the instruction of the target output level is 0W,
Only by repeating STEP1 to STEP4,
Since no branch is taken, magnetron 5 is not activated,
It is kept stopped.

Next, in accordance with the flowcharts shown in FIGS. 4 to 6, STEP21, STEP23, and S in FIG.
The processing of the one control cycle subroutine shown in TEP 25 will be described.

When the one control period subroutine is called, the high-frequency output control means 42
The setting time of the ON timer for managing the ON time is shown in FIG.
The ON time T _ON set in accordance with the target output level in STEP 20, STEP 22 or STEP 24 is set, and an INT timer (set time 15 seconds) for managing a control cycle is started in STEP 31 and the ON timer is started in STEP 32. I do.

Then, in the next STEP 33, the high-frequency output control means 42 turns on the magnetron 5 (starts operation) via the magnetron drive circuit 23. Next STEP3
Reference numeral 4 denotes an ON timer time-up judging unit. STEP 34 and STEP 4 are performed until the ON timer times out.
A loop consisting of 40 is repeatedly executed. If the target output level indicated by the target output level instructing means 41 is changed during execution of the loop, STEP
The process branches from STEP 40 to STEP 50 in FIG. On the other hand, when the ON timer times up while the target output level remains constant, the process proceeds to STEP 35, where the high-frequency output control means 4
2 turns off the magnetron 5 (stops operation).

Then, the high-frequency output control means 42 repeatedly executes a loop consisting of the following STEP 36 and STEP 41, and when the INT timer times out in STEP 36, proceeds to STEP 37 and proceeds to STEP 37 where the one control cycle subroutine is called (STEP 21). , STEP2
(3, any of STEP 25) and returns to STEP 1 which is the next STEP. When the target output level becomes 0 W in STEP 41 (when there is an instruction to end automatic cooking), the process immediately returns to STEP 1.

STEP 30 to STEP 36 described above
According to the processing of the above, if the target output level is not changed during the ON time and the target output level is not changed to 0 W during the OFF time, as shown in FIG.
The magnetron 5 is operated during the ON time T _ON according to the target output level, and after the ON time T _ON elapses, the control cycle T
_The magnetron 5 is stopped during the OFF time _TOFF until the _INT ends, and the magnetron 5 in one control cycle unit
Controls the high-frequency output level.

Next, the processing when the target output level specified by the target output level specifying means 41 is changed in STEP 40 of FIG. 4 will be described. When the target output level is changed in STEP 40, the process branches from STEP 40 to STEP 50 in FIG. When the target output level after the change is 550 W, the control goes from STEP 50 to ST
The process branches to EP37 and returns to STEP1. STE
Upon returning to P1, the process branches from STEP1 to STEP10, and the magnetron 5 is continuously operated.

The target output level after the change is 300 W
When was is branched from STEP51 to STEP 60, the high-frequency output control unit 42 sets the 8.5 seconds which is ON time corresponding to the output level 300W to compare variables T _CM, branches to STEP70 in FIG. 6 I do.

The target output level after the change is 200 W
When was is branched from STEP52 to STEP 61, the high-frequency output control unit 42 sets the 6.0 seconds which is ON time corresponding to the output level 200W to compare variables T _CM, branches to STEP70 in FIG. 6 I do.

The target output level after the change is 100 W
When was is branched from STEP53 to STEP 62, the high-frequency output control unit 42 sets the 3.5 seconds is ON time corresponding to the output level 100W to compare variables T _CM, branches to STEP70 in FIG. 6 I do.

The target output level after the change is 550.
If it is not any of W, 300 W, 200 W, and 100 W, that is, if it is 0 W, in STEP 54, the high-frequency output control means 42 turns off (stops operation) the magnetron 5, branches to STEP 37, and proceeds to STEP 1 in FIG. To return.

[0057] In STEP70 in FIG. 6, the elapsed time of the ON timer (corresponding to the operation continuation time of the present invention), ON in accordance with the target output level after the change of the comparison variables T _CM set time (the present invention (Corresponding to time).
Then, when the elapsed time ON timer was set time or the comparison variable T _CM is, ST from STEP70
After branching to EP80, the high-frequency output control means 42 immediately turns off (stops operation) the magnetron 5 and continues the STE operation.
Wait for the INT timer to expire at P81,
The process branches to STEP 37 and returns to STEP 1 in FIG.

FIG. 7 shows STEP 70 and STE.
A view showing the effect of treatment P80,81, at t ₂₁ in ON time of the control period T _22, the target output level 30
The example which reduced from 0W to 200W is shown. In this case, the elapsed time of the ON timer at t ₂₁ were set to T _CM, ON target output level after reduction (200 W)
Since the time (6.0 seconds) has been exceeded, the magnetron 5 is immediately turned off.

Therefore, the conventional method described above
Control cycle T in which the target output level has decreased _{twenty two}Next control cycle T
_{twenty three}When the ON time is changed with (8.5 seconds → 6.0 seconds)
In comparison, the hatched portion (t_{twenty two}-T_{twenty one}) Only, magneto
The operation time of Ron 5 is reduced. That is, the target output level
High-frequency output level by magnetron 5
Bell drops quickly.

[0060] Further, in STEP 70, (corresponding to the operation continuation time of the present invention) elapsed time ON timer, compare the variable T _CM set time (the time corresponding to the target output level after reduction of the present invention Equivalent),
Proceeding to STEP 71, the high frequency output control means 42 is turned on.
Elapsed time of the timer is waiting to reach the time that has been set in the comparison variable T _CM, the magnetron 5 O in STEP72
FF (stop operation). And in the following STEP73,
Wait until the INT timer expires, then STEP3
Then, the process returns to STEP 1 of FIG.

FIG. 7 shows steps 70 to ST.
FIG. 7 is a diagram showing an effect of the processing of EP73, where
Target output level decreases during time (300W → 200W)
Shows the case where the target output level rises (200 W → 300 W) during the ON time.

[0062] In Figure 7 of the elapsed time of the ON timer in t ₁₁ to the target output level drops is less than the target output level (200 W) ON in accordance with the time after reduction (6.0 seconds). O Therefore, high-frequency output control unit 42, then, the elapsed time of ON timer has been set to the comparison variable T _CM, corresponding to the target output level after reduction (200 W)
In t ₁₂ reaching the N time (6.0 seconds), and OFF (deactivated) the magnetron 5. In this case, the conventional method described above, changes the ON time in the next control period T ₁₃ of the control period T ₁₂ in which the target output level drops (8.5 seconds → 6.0
Second), the shaded portion (t ₁₃ −t ₁₂ ) in the figure
Only, the operation time of the magnetron 5 is reduced. That is,
According to the change of the target output level, the control cycle T ₁₂ at the time of the change
, The high-frequency output level drops quickly.

[0063] Also, FIG. 7 of the elapsed time of the ON timer in t ₃₁ to the target output level is increased, compared variable T _CM is set to the target output level after rise (300
W) is shorter than the ON time (8.5 seconds). Therefore, high-frequency output control unit 42, then, the elapsed time of the ON timer, at t ₃₂ reaches a target output level (300 W) ON in accordance with the time after rising (8.5 seconds), the magnetron 5 OFF ( Operation is stopped). In this case, the control cycle T in which the target output level is increased by the above-described conventional method
Change the ON time in the next control period T ₃₃ of ₃₂ (6.0 seconds →
Compared to when 8.5 seconds), the hatched portion in FIG. (T ₃₂ -
The operating time of the magnetron 5 is extended by t ₃₁ ).
That is, according to the increase in the target level, the control cycle T during the increase
The high frequency output level at ₃₂ rises quickly.

As described above, the high-frequency output control means 42 performs the processing shown in FIG. 6 and controls the operation time of the magnetron 5 in the control cycle in which the target output level has been changed, thereby obtaining the target output level. , The high-frequency output level can be changed quickly. As a result, the weight sensor 19 can be used in the “thaw” automatic cooking.
Since the difference between the required total heating amount determined according to the weight of the food 4 detected by the above and the actual total heating amount decreases,
Accurate "thaw" automatic cooking that prevents the total heating amount from becoming insufficient or excessive can be performed.

In this embodiment, "thawing" automatic cooking has been described as an example of automatic cooking. However, even if other types of automatic cooking are accompanied by a change in high-frequency output, the present invention is not limited thereto. The effect of can be obtained.

Also, in the present embodiment, in FIG.
70, STEP 80 and STEP 81 to reduce the operation time of the magnetron 5 and STEP 70 to STEP 7
Although the best effect of the present invention is obtained by performing both the shortening and the lengthening of the magnetron 5 by the method 3, the effect of the present invention can be obtained by performing either one of them.

Further, as shown in the present embodiment, the present invention provides a method for determining a more accurate cooking sequence in accordance with the weight of a food detected by the weight sensor 19 with high accuracy. Although particularly effective, the effects of the present invention can be obtained even when the weight of the food is set by the user.

Further, in the present embodiment, the description has been given by taking as an example a composite cooker that performs both high-frequency heating and hot-air heating. However, the cooker is not limited thereto, and may be a microwave oven, a toaster range, a microwave oven, or the like. The present invention can be applied to any heating cooker having a high-frequency heating function.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a side surface of a composite cooking device.

FIG. 2 is a control block diagram of the combined cooking device shown in FIG.

FIG. 3 is a control flowchart of a heating high-frequency output level.

FIG. 4 is a control flowchart of a heating high-frequency output level.

FIG. 5 is a control flowchart of a heating high-frequency output level.

FIG. 6 is a control flowchart of a heating high-frequency output level.

FIG. 7 is an explanatory diagram showing a transition state of an output level of a heating high frequency.

FIG. 8 is an explanatory view showing a method of changing the output level of the high frequency wave for heating in the combined cooking device shown in FIG. 1 and a conventional heating cooking device.

[Explanation of symbols]

1. Composite cooker, 2. Heating room, 3. Turntable, 4.
... Cooked food, 5 ... magnetron, 6 ... gas burner, 8 ... circulation fan, 9 ... air passage, 10 ... exhaust cylinder, 11 ... turntable table, 12 ... synchronous motor, 14 ... circulation fan motor, 15 ... door, 16 ... Open / close switch, 17 temperature sensor, 18 humidity sensor, 19 weight sensor, 20 operation unit, 21 control unit, 32 burner operation control unit, 40 cooking sequence setting means, 41 target output level instructing means, 42 high frequency output control means

Continued on front page F term (reference) 3K086 AA01 AA07 BB02 BB03 BB04 BB08 CA01 CA02 CB03 CB12 CC01 CD04 CD08 CD11 CD19 CD27 DA02 DA13 DB17 3L086 AA04 AA07 CA06 CA12 CB04 CC06 CC07 CC10 CC14 DA20 DA29

Claims (3)

[Claims] 1. A heating chamber for accommodating a cooking product, a high frequency generating means for generating a high frequency for heating introduced into the heating chamber, and controlling the operation of the high frequency generating means in a predetermined control cycle unit.
The high-frequency generating means is in an operating state for a predetermined ON time from the start of the control cycle, and the high-frequency generating means is in an OFF time, which is a time from the end of the ON time to the end of the control cycle. In a stopped state, a high-frequency output control means for controlling the output level of the high-frequency generation means by changing the ON time according to a predetermined target output level, and a high-frequency output control means according to a predetermined cooking sequence. And a target output level instructing means for instructing the target output level by the high frequency output control means, wherein the target output level instructed by the target output level instructing means is set during the ON time. When it has changed, the operation continuation time of the high frequency generating means up to the time of the change in the control cycle at the time of the change corresponds to the target output level after the change. If the operation continuation time is shorter than the ON time, the operation continuation time of the high frequency generation means in the control cycle at the time of the change reaches the ON time, and Stopping the operation of the generating means, and starting the control of the output level of the high-frequency output means in accordance with the changed target output level after a lapse of time obtained by subtracting the ON time from the control cycle after the stop. A cooking device characterized by the following. 2. A heating chamber for accommodating a cooking product, high-frequency generating means for generating high-frequency heating for introduction into the heating chamber, and controlling the operation of the high-frequency generating means in units of a predetermined control cycle;
The high-frequency generating means is in an operating state for a predetermined ON time from the start of the control cycle, and the high-frequency generating means is in an OFF time, which is a time from the end of the ON time to the end of the control cycle. In a stopped state, a high-frequency output control means for controlling the output level of the high-frequency generation means by changing the ON time according to a predetermined target output level, and a high-frequency output control means according to a predetermined cooking sequence. And a target output level instructing means for instructing the target output level by the high frequency output control means, wherein the target output level instructed by the target output level instructing means is set during the ON time. When the frequency has decreased, the operation continuation time of the high-frequency generating means up to the time of the decrease in the control cycle at the time of the decrease corresponds to the target output level after the decrease. If the operation continuation time is equal to or longer than the ON time, the operation of the high-frequency generation means is immediately stopped, and the time obtained by subtracting the operation continuation time from the control cycle after the stoppage is obtained. From the time passed,
A heating cooker characterized by starting control of an output level of said high-frequency output means in accordance with a reduced target output level. 3. The cooking sequence according to claim 1, further comprising a weight detecting unit configured to detect a weight of the food placed in the heating chamber.
The cooking device according to claim 1, wherein the heating cooker is determined according to a weight of the food detected by the weight detection unit.