JPH035626A - Heat cooking apparatus - Google Patents

Abstract

PURPOSE:To perform the cooking of foodstuff without overcooking or undercooking by providing an operation stoppage control means which sets the time when the cooking is done based on the start time and the computation result of the detected weight ratio after a certain elapsed time. CONSTITUTION:When the start switch is turned on with the toast cooking mode selected, the operation control circuit 15 reads and stores in memory the weight which is detected by a weight sensor 14, and said weight is designated as W0. The operation control circuit 15 then causes power to be supplied to heater 3, 3 to start the toast cooking. As the dough for bread is heated, the internal moisture gradually evaporates. The moment when the predetermined constant elapsed time Tc has past from the start of the cooking operation, the detected weight is again read and stored in memory. This moment is designated as tk, and the detected weight at this moment as W1. The ratio between the detected weights W0 and W1 is then computed to obtain alpha (W1/W0). Thereafter, the cooking is continued until the set operation stoppage time Ts comes, when the cooking is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heating cooker suitable for obtaining toast or kutsky.

(Prior Art) Conventionally, toasters and microwave ovens with a toaster function heat bread with a heater to toast it.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional method, since the user sets the cooking operation time, there is variation in the degree of baking of the bread, especially when baking the bread multiple times in a row. In such a case, since the temperature in the cooking chamber has also increased, there is a tendency for the bread to be overcooked for the second and subsequent cooking times. In particular, microwave ovens are often used to heat other foods before being used as a toaster, and in this case too, the bread may be overcooked. If you take this into account and set the cooking operation time to be short, there is a risk of undercooking. Furthermore, if the bread is so-called thickly sliced or thinly sliced, it is difficult for the user to set the time properly, which often results in over-baking or under-baking. These problems also apply to the production of kutsky.

The present invention has been made in view of the above circumstances, and its object is to provide a cooking device that can cook food without overcooking or undercooking the food.

[Structure of the Invention] (Means for Solving the Problems) The present invention has been made with attention to the following points. That is, in general, foods to be cooked such as bread and kutsky dough contain a certain amount of moisture before being heated, and when they are heated, that moisture evaporates. Overcooking or undercooking of the food to be cooked can be reflected in changes in the moisture content, respectively. The degree of change in the moisture content, and hence the degree of change in the amount of water evaporated, is approximately equivalent to the degree of change in weight. Therefore, when a cooking operation is performed, by looking at the degree of change in the weight of the food to be cooked, it is possible to appropriately control the timing at which the operation ends.

Therefore, the present invention provides a weight sensor that detects the weight of an object to be cooked, a heating means that heats the object, and a weight sensor that detects the weight at the start of the cooking operation and a point at which a certain period of time has elapsed from the point in time. A calculation means for calculating the weight ratio of the cooking operation, an end time setting means for setting the time until the end of the cooking operation according to the calculation result, and an operation end control means for ending the cooking operation based on the set time. It is made up of

(Operation) The calculation means calculates the weight ratio between the detected weight at the start of the cooking operation and the detected weight i= at the time when a certain period of time has elapsed from that point. Depending on the size of this weight ratio, it is possible to determine the current degree of grilling of the object to be cooked, and furthermore, the time required for subsequent operation to finally obtain a good degree of grilling.

However, since the end time setting means sets the time until the end of the cooking operation according to this calculation result, it is possible to set an appropriate cooking operation time. Then, the operation termination control means terminates the cooking operation based on the set time, so that the operation can be terminated when the cooking condition is good.

(Embodiment) A first embodiment of the present invention applied to a microwave oven with a toaster function will be described below with reference to FIGS. 1 to 5.

FIG. 2 shows the overall configuration of the microwave oven. A cooking chamber 2 is provided inside the main body 1.
Heaters 3, 3 serving as heating means are arranged above and below. The operation panel 4 of the main body 1 is provided with various switches such as a menu selection switch and a start switch, as well as a display 5 and the like. The cooking operation in the automatic toast cooking mode can be set using the menu selection switch.

In FIG. 3, leaf springs 8, 8 are provided at the lower edge of the bottom plate of the cooking chamber 2 via a frame 7, and a turntable driving motor 9 is held by the leaf springs 8, 8. A rotating shaft 9a of the motor 9 projects into the cooking chamber 2. A mounting plate 10 used for toast cooking can be attached to the protrusion of the rotating shaft 9a. Since the motor 9 is supported by the leaf springs 8, 8, when a food is placed on the placement plate 10, the motor 9 is displaced downward according to its weight.

A fixed electrode plate 11 is attached to the frame 7, and a movable electrode plate 12 facing the fixed electrode plate 11 is attached to the motor 9. The weight sensor 14 is constituted by these. The electrode plate 12 is displaced together with the motor 9 depending on the weight of the food on the mounting plate 10, and as a result, the gap or capacitance between the picture electrode plates 11 and 12 changes. However, weight sensor 1
4 electrically detects the weight of the food to be cooked using this capacitance. The detected weight represented by this electric signal is applied to an operation control circuit 15 consisting of a microcomputer shown in FIG.

The microwave oven of this embodiment is equipped with a well-known magnetron 1.
6. A fan motor 17 is provided.

Now, when the toast cooking mode is selected and the start switch is turned on, the operation control circuit 15 operates according to a predetermined operation program as shown in FIG. It functions as a setting means and an operation end control means.

Hereinafter, the operation of the above configuration will be explained together with the control contents of the operation control circuit 15.

First, when the toast cooking mode is selected and the start switch is turned on, the operation control circuit 15 reads and stores the detected weight from the weight sensor 14 (step S
1. The weight at this time is W.

). And this initial detection type ffi w o is 80
Step S2) Determine whether or not the time is greater than or equal to g.
3), if not longer, set 25 seconds as time T1 and set 25 seconds as time T2 (step S4
). Here, the purpose of these times T1 and T2 will be described. In this embodiment, the cooking operation reference time is T.
.

(See FIG. 5) is predetermined, and the actual cooking operation time is determined as the cooking operation reference time T according to the weight ratio described later. , and the T. When adding the above time T1 to and time T2
I am trying to choose when to reduce the amount. The purpose of switching these times T1 and T2 to "15 seconds" and "25 seconds" based on the initial detected weight r80gJ is that if the output of the heaters 3, 3 is constant, depending on the amount of the load to be cooked, that is, the amount of bread. There are different degrees of good grilling, so this is for adjusting that. After that, the operation control circuit 15 energizes the heaters 3 and 3 to start toast cooking (step S5). By starting this toast cooking, the bread is heated and the moisture inside it gradually evaporates. and,
A preset period of time Tc (
Tc<T. ) has passed (determined in step S6)
, the detected weight is read again and stored (step S7).

This time point is designated as tk (see FIG. 5), and the detected weight at this time is designated as Wl. After that, the detected weight W at the time of starting the operation. The weight ratio between the current detection type ffi w + and the current detection type ffi w + is calculated (step S8). Let the calculated weight ratio be α(W + /W 2 ). In addition, in this example, the weight ratio corresponding to good baked condition was 90 to 93.
%. The above-mentioned time Tc is set at a time value such that the weight ratio at this time tk does not reach the final target of 90 to 93%.

Therefore, the weight ratio at this time tk is the characteristic line P in FIG.
If it is less than 95% as shown by a (determined in step S9), the operation reference time T is set as the operation end time Ts (time from the start of operation). Set the time by subtracting time T2 from (step 510) Also, if the weight ratio is the characteristic line P in FIG.
If it exceeds 97% as shown in c (step Sll
), and the operation reference time T as the operation end time Ts.

and the above-mentioned time T (step 51).
2). When the weight is other than the above, that is, when it is in the range of 95% to 97% as shown by the characteristic line pb in FIG. 5, the operation reference time T is directly set as the operation end time Ts (
step 813). The purpose of such a setting is that at this time tk, the larger the weight ratio, the shorter the remaining operating time.

Thereafter, the cooking operation is executed and stopped until the set operation end time Ts is reached (determined in step S14) (step 515).

As described above, according to this embodiment, the weight sensor 14 is provided to check the degree of baking of the bread, that is, the moisture content, and the detected weight W at the start of the cooking operation. Since the weight ratio between the detected weight W1 and the detected weight W1 after a certain period of time Tc has elapsed from this point in time is calculated, depending on whether this weight ratio is large or small, it is possible to determine the current degree of baking of the bread to be cooked, and ultimately whether the bread is well-baked or not. The time required for subsequent operation to obtain the desired condition, that is, the operation end time Ts can be calculated, and the time until the end of the cooking operation is set according to this calculation result, so that an appropriate cooking operation time can be set. Furthermore, the set operation end time T
Since the cooking operation is terminated based on s, the operation can be terminated when the bread is well-baked, and thus the bread can be automatically cooked to avoid over-baking or under-baking.

In particular, according to the above embodiment, the correction times T1 and T2 themselves are changed depending on the amount of bread that is the load.
You can bake bread even better.

6 and 7 show a second embodiment of the present invention, which differs from the above embodiment in the following points. In this second embodiment, when the weight ratio of the bread reaches 90 to 93%, the shortest fixed time Tk for 7TP1 is predetermined in consideration of the weight of the bread, etc., and the detection at the start of operation is performed. Type EIW. Calculate the ratio between this and the detection type ff1W1 when the fixed time Tk is reached (steps 81 to 5), and if the ratio is less than the final target weight ratio of 93%, at this point tr
Step 86 To immediately stop the cooking operation by setting the delayed cooking operation time T1 from (Fig. 7) to 0 seconds, that is, to stop the operation.
~8) If it is not less than 93%, the delayed cooking operation time T from this time point t is 15 seconds, depending on the initial detected weight W0.
20 seconds (steps 89 to 11), and when the delayed cooking operation time has elapsed, the cooking operation will be stopped (
Step S12.8).

This second embodiment also provides the same effects as the first embodiment.

In each of the above embodiments, the case of so-called toast cooking is illustrated, but this can also be applied to the case of kutsky cooking. Further, in each of the above embodiments, the present invention is applied to a microwave oven with a toaster function, but the present invention can also be applied to a stand-alone toaster.

In addition, the present invention is not limited to the above-described embodiments, and can be implemented with various modifications without departing from the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention comprises a weight sensor for detecting the weight of the food to be cooked, a heating means for heating the food to be cooked, and a detected weight at the start of the cooking operation. a calculation means for calculating the weight ratio with the detected weight after a certain period of time has elapsed from the time; an end time setting means for setting the time until the end of the cooking operation according to the calculation result; The device is equipped with an operation termination control means for terminating the cooking operation, so that the operation can be terminated when the bread is baked to a good degree, thereby automatically cooking the bread to prevent it from being over-baked or under-baked. It has excellent effects such as being able to

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, Figure 1 is a flowchart showing the control contents of the control circuit, Figure 2 is a perspective view of the microwave oven, and Figure 3 is a longitudinal cross-sectional side view of the main parts. FIG. 4 is a block diagram showing the electrical configuration, and FIG. 5 is a diagram showing an example of a change in weight ratio. 6 and 7 show a second embodiment of the present invention, FIG. 6 is a diagram corresponding to FIG. 1, and FIG. 7 is a diagram corresponding to FIG. 5. In the figure, 3 is a heater (heating means), 14 is a weight sensor, 1
5 is an operation control circuit (calculation means, end time setting means, operation end control means).

Claims (1)

[Claims] 1. Calculate the weight ratio between the weight sensor that detects the weight of the food to be cooked, the heating means that heats the food, and the weight detected at the start of the cooking operation and the weight detected after a certain period of time has elapsed from that point. A heating cooking device comprising: a calculation means for determining the time to complete the cooking operation; an end time setting means for setting the time until the end of the cooking operation according to the calculation result; and an operation end control means for ending the cooking operation based on the set time. vessel.