JPH0353485A - Heat cooking device - Google Patents

Abstract

PURPOSE:To prevent insufficient heating and over heating of the food by measuring the power source voltage multiple times during the time from immediately after starting the heating to concluding the heating, and correcting the residual time in order so that the heating value equal to the case that the rate voltage is applied to an initial set time heating means is applied in response to the measured voltage. CONSTITUTION:The power source voltage to be applied from a CPU 10b as a voltage detecting means to a heating means 6 is detected in a microcomputer 10, and the initial set time is corrected by a CPU 10b as a correcting means so that the heating value to be obtained in the case that the food is heated with the power source voltage detected immediately after starting the heating becomes equal to the heating value desired by a cooking person. Furthermore, the correcting means corrects the residual time in order so that the heating value to be obtained in the case that the food is heated with the power source voltage to be supplied from a voltage detecting means each time of passing the predetermined time after the first correction is performed becomes equal to the heating value desired by a cooking person. Insufficient heating and over heating is thereby prevented even if the fluctuation of the power source voltage is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application of Industrial Articles> The present invention is characterized in that the energization time of the heating means is set to 0. This invention relates to a new cooking device that automatically adjusts the voltage based on the voltage.

Conventional technology and problems to be solved by the invention
In heating cooking devices such as microwave ovens, the heating time is generally set according to various conditions such as the type and weight of the food, and then the heater is energized to perform the cooking. Normally, Shokawa Electric Power (100V) is applied to the above heater via a power switch, and if this power supply voltage fluctuates, for example, by ±10% with respect to the rated voltage of 100V, the heating power of the heater will also fluctuate accordingly. There was an inconvenience that the food could not be cooked evenly due to undercooking or overcooking.

This invention was developed in view of the above-mentioned problems, and the object is to provide a heating cooking device that can uniformly finish food by preventing insufficient heating or excessive heating even if the power supply voltage fluctuates. Let's call it 11th.

Means for Solving the Problems〉 Heating of the present invention to overcome the above objects j. ! In the J-grid device, a heating means is arranged in a heating chamber that houses the food, and the heating time is initially set by the cook at the start of cooking, and the rated value of the commercial power source is applied to the heating means during this initial setting time to achieve the desired heating time. The apparatus includes a voltage detection means for detecting the power supply voltage applied to the heating means from the start of heating to the end of heating, and a power supply immediately after the start of heating detected by the voltage detection means. The initial setting time is corrected so that the amount of heat when heating the food with voltage is equivalent to the amount of heat desired by the cook, and after making this first correction,
and a correction means for sequentially correcting the remaining time so that the amount of heat when heating the food with the power supply voltage detected by the voltage detection means is equivalent to the amount of heat desired by the cook every time a predetermined time elapses. Features.

Effects> According to the present invention having the above configuration, the voltage detection means detects the power supply voltage applied to the heating means. Then, the initial setting time is corrected by the correction means so that the amount of heat obtained when the food is heated with the power supply voltage detected immediately after the start of heating is equivalent to the amount of heat desired by the cook. With this modification, the power supply voltage can be changed to the rated value of the commercial power supply (for example, 100V).
±5%), the amount of heat commensurate with the heating time initially set by the cook can be added to the food even if the heating time is higher or lower.

Furthermore, after the correction means performs the first correction,
The remaining time is sequentially corrected so that the amount of heat obtained when heating the food with the power supply voltage supplied from the voltage detection means every time a predetermined time elapses is equivalent to the amount of heat desired by the cook. By making corrections after this second time l], even if the power supply voltage fluctuates during heating, the amount of heat commensurate with the heating time set by the cook can be added to the food.

As described above, the energization time of the heating means is dynamically adjusted in accordance with the power source voltage detected by the voltage detection means.

Examples> The following is an example of addition of the present invention. The I'A cooking device will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram that does not show an embodiment of the heating cooking apparatus according to the present invention.

] is an operation panel attached to the surface of the microwave oven body, and this operation panel 1 includes a selection key 2 for selecting a heating mode such as oven heating, grill heating, etc.
Timer 3 for initially setting the heating time of ingredients, heating mode and initial setting time T, heating time T that is updated sequentially
A display section 4 for displaying 0, etc., and a heating key 5 for starting energization of the heater 6 are arranged. The heater 6 has electricity!
7. A transformer 7 that steps down the voltage and supplies it to the A/D conversion circuit 8 is connected. The operation panel 1 and the A/D conversion circuit 8 are connected to the microcomputer 0 via an ink face 9.

This microcomputer o temporarily stores the set time T and heating mode 1.c' set by the cook in the R0 AM10a, and
b takes in the power supply voltage data ■ at every predetermined timing (N-1, 2...) that has been A/D converted by the A/D conversion Kll path 8, and this power supply voltage data ■ is the reference voltage V.
(When N-1, the rated power supply voltage is 100V, and when it is N-N-l 2 or more, the power supply voltage that was previously fixed at 11111) changes by 5% (ΔV) or more, the heater Correct the remaining time of heating time T according to No. 6 to T9 hours N-1. TN is set as a new heating time.

FIG. 2 is a graph showing the results for obtaining corrected data on remaining time. In this experiment, we used the heating cooking device described above, put 500cc of 20°C water as food into the pot, set the heating mode to oven mode, and controlled the voltage applied to the heater 6 (power supply voltage), the surface temperature of the heater 6, and the temperature of the water in the pot. In addition, the vertical axis is temperature,
Horizontal axis beam. '/ Indicates a gap.

According to the figure, the time required for the heater 6 to reach the saturation temperature of 350° C. after starting heating is 1.1. At OV it takes about 9 minutes and 40 seconds, at rated 100V it takes about 20 minutes and 45 seconds, and at 90V it does not reach the saturation temperature even after 33 minutes.

The time it takes for the water in the pot (20°C) to reach the saturation temperature of 100°C is approximately 100°C. 25 minutes 39 at voltage 110V
seconds (T la time), 26 minutes 3 at rated 100V
4 seconds (To time), 33 minutes 57 seconds at 90V (T1
b time). In other words, when the power supply voltage is IIOV, the time a (55 seconds) is shorter than that at the rated voltage, and when the power supply voltage is 90■, the time b is shorter than at the rated voltage.
The time (7 minutes 22 seconds) becomes longer.

From the above measurement results, when the power supply voltage is 110■,
For example, if the heating time at the time of initial setting (1o) is T, then the time a is subtracted from this To by 5, and the rated voltage is 1.
T o++ with 00■! This adds the same amount of heat to the food as heating it for 7 minutes. Also, if the power supply voltage is 90V, the initial setting heating time T. Against bIl! Heating added for 11 times! By adjusting T1b between i, T at rated voltage 100V. The same amount of heat is added to the food as it is heated for a certain amount of time.

In other words, the time required to reach the saturation temperature when food is heated at the rated voltage of 100V, and the variation in the voltage ti. The difference between the time required to reach the saturation temperature when food is heated by voltage (for example, a and b above) is stored in memory as correction data, and this difference is used to change the initially set heating time T to T 1
Alternatively, by resetting Tlb to 0 1a, it is possible to prevent the food from being underheated or overheated due to fluctuations in the power supply voltage.

In this cooking device, the corrected time ratios (for example, a/TN, b/T) are stored in advance in RAM 10a of the microcomputer 10N-1 in accordance with the magnitude of the power supply voltage. , the residual N is applied to the field sound that fluctuates by about 5% with respect to the power supply voltage or the reference voltage.
-1 - 1147 corrections have been made.

FIG. 3 is a diagram for explaining the relationship between the measurement timing of the power supply voltage, the heating time, and the remaining 99 minutes.

Immediately after the start of heating (t1), the remaining time of the initial setting time is corrected to T1 with the power supply voltage set at 7Igj (however, since t and t1 are approximately equal to 0, the remaining time can be regarded as the initial setting time). and set this as the heating time (see B in the same figure).

Next, at the time (t2) when 40% of T has elapsed, the power supply voltage is again set to 11Il1, and the amount of heat to be heated with this power supply voltage is equal to IIP+ at the time of t1, and the remaining time (0 .671) Correct 0.6T to T2 so that the amount of heat when heated is equivalent, and set this T2 as the new heating time (see Figure C i1 (
( ).

In the same way, the power supply voltage is measured at time N-1 (1) when 40% of T has elapsed, and the amount of heat heated by the power supply voltage n at this time and the power supply voltage n-1 determined by the previous API (t) are calculated. The amount of heat when heated for 0.6T time is N-
1 Modify 0.6T to T to make it equivalent iE L,
, N-1 ~ This TN is set as a new heating interval 114r (see D and E in the figure).

As described above, the remaining time from the second time I] to the Nth time is corrected sequentially for 6N-10% of the previously corrected remaining time T. As a result, even if the power supply voltage fluctuates from the start of machining to the end of heating, the rated 100
It is possible to add the same amount of heat to the food as when the food is heated for the initial setting time set by the cook at V.

The operation of the heating cooking device will be explained according to the flowchart of FIG. 4. First, the cook operates the selection key 2 and timer 3 on the operation panel 1 to set the heating mode and heating time to T. After setting, operate the heating key 5. The heating time To and heating mode set by the above key operations by the cook are displayed on the display section 4. From this point on, the next pasting control program is executed one after another.

In step 1, the initial setting time To set by the cook is imported, and in step 2, the heating key 5
The heater 6 is energized according to human power.

In step 3, the variable N in the counter memory is set to 1.

In step 4, the power supply l- from the A/D conversion circuit 8 is
Take in the pressure data VN and determine the 71 & source voltage.

In step 5, the measured power supply voltage VN and the reference voltage V are compared, and if N-1 ■ - Δv < V < v + ΔV, the voltage N
-I N N-1 Source voltage V is the basis! lF! It is determined that it is within the range of N N-1 fluctuation value ΔV allowed for the voltage V, and in step 6, the remaining time is directly set as the heating time TN.

If the comparison result in step 5 above is VN<V - Δ■, the power supply voltage VN is within the allowable range N-
1. It is determined that the heating time has decreased according to the volume value, and in step 7, the time obtained by adding time b to the remaining time is set as a new heating time TN.

If the comparison result in step 5 above is V > V + ΔV, the power supply voltage VN is within the allowable range.
It is determined that the capacity value is exceeded, and in step 8, 1111, which is the sum of a IIjj, is added to the remaining time.
1′? The interval is TN.

The processing of steps 5, 6, 7, and 8 will be specifically explained in relation to the time point (N-1) of FIG. 2 t1.

In other words, compare the δ-1 constant power supply voltage and the rated 100V, and if the power supply voltage is 95 to 105■, the reference voltage 1
It is determined that the fluctuation value is within the allowable variation value of 5V for 00V, and the heating time is set to the remaining time T o t l": T
Adjust to o.

Also, if the power supply voltage is less than 95V, it is determined that the voltage is lower than the allowable value, and 7! The amount of heat when heating food with X source voltage is T when the food is heated with rated voltage of 100V.

Set T to T1 so that it is equivalent to the amount of heat when heating for a certain period of time.
Correct it to b and set it as heating time {Samurai 0}. That is, under the conditions shown in Figure 2, if the power supply voltage is 90V, the initially set heating time (2
The time obtained by adding time b (7 minutes 22 seconds) to 6 minutes 34 seconds) is defined as the heating time.

Also, if the power supply voltage is IIOV, it is determined that it exceeds the allowable value, and the amount of heat when ripening food with this increased power supply voltage is equal to the rated voltage]. O O V for the eclipse moon. The remaining time is corrected to Tla so that it is equivalent to the amount of heat when applying time. In other words, under the conditions shown in the second prisoner, if the power supply voltage is 110V, the initial heating time (26 minutes 34 seconds) will be reduced to a time (55 seconds).
is subtracted.

In step 9, the calculated new heating time TN is displayed on the display section 4.

In step 10, wait until the remaining time reaches 60% of TN, and when it reaches 60% of TN, in step 11, it is determined whether N is the preset maximum number of corrections, and if N<max. If there is, step 12 (;, set it to N4-N+1, and repeat steps 4 to 9 above.
The process is repeated (see Figure 3).

If the determination result in step 11 is N-max, step 13 waits until the remaining TN time reaches 0, and when the remaining time reaches O, power to the heater 6 is stopped in step 14, and the chime is emitted. The completion of heating is notified by etc.

Note that the determination in step 10 is based on a certain percentage of the application time TN<
40:60) determines the 4111 constant timing of the power supply voltage, but the heating port! It is also possible to set the timing so that the measurement is performed every time a certain period of time elapses after setting the TN for j.

In this way, if the power supply voltage immediately after heating starts is higher or lower than the rated voltage, modify the initial setting time,
Adds approximately the same amount of heat to the food as when heating at the rated voltage,
Further, even if the power supply voltage fluctuates during heating, the remaining time can be readjusted so that the amount of heat is equivalent to the amount of heat when heating is performed in the remaining time of the previously set heating time. Therefore, it is possible to prevent the food from being underheated or overheated in response to fluctuations in the power supply voltage, and to uniformly finish the food.

In the above example, the All constant of the power supply voltage was set to 60% of the heating time, but it may be set to other percentages, or the heating time may be reset two or more times by measuring more than once. It is possible. Also, depending on the reference voltage of 5% or more and less than 5%, the remaining 11 I
Although the case where the interval is corrected has been illustrated, it is also possible to set the variation range of the power supply voltage more finely, and to correspond to this set power supply voltage, and to set the corrected interval more precisely, and other gist of the present invention. Various design changes can be made without changing the design.

Effects of the Invention> According to the present invention, the power supply voltage is determined by δIII multiple times from immediately after the start of heating until the end of heating, and the rated voltage is applied to the heating means for the initial setting time according to the power supply voltage determined by API. The remaining time can be sequentially corrected so that the equivalent amount of heat is applied. Therefore, even if there is a fluctuation in the source voltage, it is possible to prevent the food from being underheated or overheated, and to obtain the same finish as when the rated voltage is applied to the heating means.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the heating cooking device according to the present invention, Fig. 2 is a graph showing the results of the experiment for obtaining the remaining time correction IE data, and Fig. 3 is the electric power cooking device. fi. A diagram for explaining the relationship between the measurement timing of ili If and the remaining time. FIG. 4 is a flowchart 1 showing the operation of the heating cooking device. 1: Operation panel, 3: Timer 6. Heater, 8:
A/D conversion circuit, 10: Microcomputer

Claims (1)

[Claims] 1. There is a heating means in the heating chamber that houses the food. and set the heating time at the start of cooking. The initial setting is made by the cook, and this initial setting time, Apply the rated value of the commercial power source to the heating means. A cooking device that adds the desired heat capacity to foodstuffs. At the location, The power supply voltage applied to the heating means is Detects from the start of heating to the end of heating voltage detection means; The applied voltage detected by this voltage detection means Heat the food using the power supply voltage immediately after heating starts. The amount of heat in the case is equal to the amount of heat desired by the cook. Modify the initial setting time so that the After making this first correction, the prescribed Detected by voltage detection means every time the time elapses. When heating food with a known power supply voltage is equivalent to the desired amount of heat by the cook. Correction to sequentially correct the remaining time so that means and A heating cooking device characterized by having Place.