JPS61291837A - Electronic control type cooking apparatus - Google Patents

Abstract

PURPOSE:To make it possible to execute adequate heating of foods by providing temperature raised value obtaining means for obtaining the temperature raised value at a time after the passage of a predetermined time after the detected temperature reaches a second predetermined temperature during the first heating, selection means for selecting a coefficient in accordance with the physical content of the food from the temperature raised value stored in memory means for storing the coefficient in accordance with the physical content of the food, counting means for counting the time required for the first heating, and timing means for the second heating. CONSTITUTION:When, in the first heating, the detected value of a sensor 7 reaches a second predetermined temperature T2 after the passage of 14 seconds from the start of heating, a predetermined time (t) is measured, and the temperature raised value DELTAT is obtained from a temperature T3 after the passage of a predetermined time. From this temperature raised value the physical content of a food 2 is judged and a desired coefficient K is selected. Further, in the first heating, its required time t1 is counted. The time for the subsequent second heating is obtained by multiplying the selected coefficient K to the required time t2. Here, when the second heating is carried out successively to the first heating, the food can be heated in an optimum state which is not affected by the physical content of the food.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Field of Application The present invention relates to an electronically controlled cooking device such as a microwave oven equipped with a microcomputer or the like.

First Conventional Technology Recently, a microwave oven that attempts to automatically perform appropriate heating without being affected by the initial temperature, weight, etc. of one food item has been developed using control as seen in Japanese Patent Publication No. 5.5-10113. Although it is being commercialized, 1. Currently, it is not possible to perform adequate heating.

(c) Problems to be Solved by the Invention The object of the present invention is to provide an electronically controlled cooking device that can perform sufficiently appropriate heating and can perform such heating regardless of the type of food.

B) Means for Solving the Problems The present invention comprises: 1. A jaw heat chamber for storing food, heating energy supply means for applying heating energy to the food, a temperature detector for detecting the temperature of the food, and the temperature detector. The detected temperature is the first
Driving and controlling the heating energy supplying means to perform first heating until a predetermined temperature is reached, and then driving and controlling the heating energy supplying means for a predetermined time depending on the heating status of the food during the first heating. In an electronically controlled cooking appliance including a control unit that causes the second heating to be performed.

The control unit determines a temperature increase value based on the temperature detected by the temperature sensor at a predetermined time after the temperature detected by the temperature sensor reaches a second predetermined temperature during the first heating. Increase value means 1 Coefficient storage means for storing a plurality of coefficients predetermined according to the physical content of the food; 9 coefficients according to the physical content of the food according to the temperature increase value determined by the temperature increase value means; a coefficient selection means for selecting from the coefficient storage means, a counting means for counting the time required for the first heating, a dead time counted by the counting means, and the dead time counted by the counting means being multiplied by the coefficient selected by the coefficient selection means, 2
It is characterized by having time means for obtaining time for heating.

(E) Effect By the above means, sufficient and appropriate heating can be carried out without being affected by the weight of the 91 food and regardless of the type of food.

(f) Example A microwave oven according to an example of the present invention will be described below with reference to the drawings.

Figure gJ1 shows the appearance of the same microwave oven. A heating chamber (3) for storing food (2) is provided in the microwave oven main body (1), and a door (4) for opening and closing the front opening of the heating chamber (3) is provided in the front of the main body (1). A keyboard (5) having various keys for setting heating information is also provided.

′! Figure ll12 shows the internal structure of the microwave oven. Inside the main body (1), in addition to the heating chamber (3) (food (2)
) is provided with an infrared sensor f (7) that detects the temperature of the food (2) by receiving infrared rays from the food (2). .

FIG. 3 shows the circuit of the microwave oven. A microcomputer (8) is provided, which performs heating based on the temperature detected from the keyboard (5), the heating information from the keyboard (5), and the sensor/f(n) via the signal processing circuit (9). Controls the output of signal H. When the heating signal is output, the switching circuit (Ill) is turned on, power from the commercial power supply G11 is supplied to the high voltage circuit +12, and high voltage is applied to the magnetron (6). The magnetron (6) oscillates and microwaves are applied to one food item (2).

An outline of the operation of the microwave oven will be explained based on the characteristics showing the temperature detected by the senna (7) with respect to the heating time of the food (2) shown in FIG.

Referring to the solid line in FIG. 5, first, the food (2) is heated as the 1710th heat until the temperature detected by the senna (7) reaches the first predetermined temperature T175°C). Subsequently, as second heating, heating is performed for a predetermined time depending on the heating status of the food (2) in the first heating, and when the second heating is performed following the first heating, the food heating is completed.

More specifically, in the first heating, the detected temperature of the senna (7) is determined when 14 seconds have elapsed since the start of heating (during these 14 seconds, the operation of the sensor f (7) and the signal processing circuit (9) is stable). When the second predetermined temperature T2 (20° C.) is reached after the time when the second predetermined temperature T2 (20° C.) is reached, a predetermined time t (30 seconds) is counted from there. Then, the temperature increase value ΔT from the second predetermined temperature T2 is determined from the temperature T3 after the predetermined time has elapsed.

The temperature rise value ΔT varies depending on the physical content of the food (2), that is, the weight, type (verticality), etc. 1 For example, it is classified into four stages as shown in the table below. corresponds to the optimum coefficient K (described later).Such a table is stored in the coefficient storage section (81L) in the microcomputer (8).
) is stored in

1 from the temperature rise value obtained as described above.
The physical content of food (2), ie, the amount of food (2) is large, the content of food (5+2) is hard, etc. is determined, and a desired coefficient K is selected.

Further, in the first heating, the required time t1 is counted.

The heating time is obtained by multiplying the required time t1 by the selected coefficient 11.

Here, if the second heating is performed following the first heating.

Food can be heated to an optimal state that is not affected by the physical content of the food.

The heating mode described above is suitable for reheating cooking.

In addition, referring to the broken line in FIG. 4, in the first heating,
If the detected temperature of Senna (7) has already reached the second predetermined temperature T2 (20°C) after 14 seconds have passed from the start of heating (for example, when the initial temperature of the food is high), the temperature is immediately increased from there for a predetermined period of time. t (30 seconds) is timed. Then, the temperature increase value ΔT' from 2 at the second predetermined temperature is determined from the temperature T5' after the elapse of the predetermined time. The subsequent explanation is the same as above.

Now, the operation of the microwave oven will be specifically explained based on the flowchart of the program of the microcomputer (8) shown in FIG.

After the power is turned on, the program passes through the S1 step and is 82.83
Cycling through steps. In the 81st step, the microcomputer (8) is initialized, and in the 82nd step, a key operation on the keyboard (5) is detected.
In step 815, it is determined whether or not the start key has been operated.

When the reheating key and start key are sequentially operated on the keyboard (5) in order to reheat food (2) along the solid line in Figure 4, the program exits the cycle of step 82 and SI described above. The process reaches step S4. In this step, it is determined whether or not the reheating key has been operated. In this case, the reheat key has been operated, and the program will start at 85.
Reaching the steps.

Note that if the answer is NO in step S4, the program proceeds to another appropriate step. Then, in step S5, the output of the heating signal H is controlled, microwave heating is performed, and the first heating is started. Continuation (In step S6, the microcomputer (
The counter ONTM in 8) starts time counting operation. Furthermore, in the following step 87, another counter cN'r2 in the microcomputer (8) is set to 14 seconds, and counting down from this time is started. Then, in the next step 88, it is determined whether the contents of the counter 0-NT2 have become 0 or not. Since it is now just after the start of counting, the program that sets the contents of the counter ON'r2 to 0 remains at step S8.

After that, when 14 seconds have passed (the operation of the sensor (7) and the signal processing circuit (9) have become stable), the program reaches step S9. In this step, the counting operation of the counter 0111T2 is stopped and the temperature of the food is detected by the sensor (7). In the following step S10, it is determined whether the food temperature has reached the second predetermined temperature '1'2 (20°C). Now, no such arrival is made and the program then cycles through 89,810 steps. When the above is reached, the program reaches step 811. In this step, a predetermined time t (30 seconds) is set in yet another counter 0NT3 in the microcomputer (8), and counting down from this time is started.

In the next step 812, it is determined whether the content of the counter 0NT3 has become O. Since it is now just after the start of counting, the contents of the counter 0NT3 are not 0 and the program remains at step 812.

After a predetermined period of time (30 seconds) has elapsed, the program proceeds to the sti step. In this step, the above counter is 0.
The counting operation in NT3 is stopped, and the above senna (
7), the food temperature T5 is detected. In the next step 814, the temperature increase value ΔT is obtained by subtracting the second predetermined temperature T2 from the food temperature T5. In the subsequent step S15, a coefficient K corresponding to the physical content of the food is selected from the coefficient storage section (8&) based on the temperature rise value ΔT.

In the next step (7) 816, the food temperature is detected by senna (force).Furthermore, in the next step 817, the food temperature detected in step S16 is changed to the first predetermined temperature Tl (
75° C.) is reached. Assuming that it has not been reached in this case, the program cycles through 816,817 steps. If the above is then reached, the program reaches step 818. In this step, the counting operation of the counter CNT1 is stopped, and the time t1 required for the first heating is now counted by the counter 0NT1. In the next step 819, the time t1 counted by the counter 0NT1 is multiplied by the coefficient selected in the step 815, and the microcomputer (8) calculates 11L as the time for the primary secondary heating. It is set in yet another counter 0NT4 within. In the subsequent step S20, it is determined that the second W heating is performed following the first heating.

In the next step 821, the counter NT4 starts counting down from tl at time. Furthermore, in the next step 822, it is determined whether the contents of the counter 0NT4 have become 0 or not. In this case, it is not 0,
The program remains at 322 steps. Then, when the content of the counter 0NT4 becomes O, the program reaches step 825. In this step, the counting operation of the counter QNT4 is stopped, the output control of the heating signal H is stopped, the second heating is stopped, and the reheating of the food (2) is completed.

The program then returns to the $1 step, @82.
The state is such that the BS steps are cycled.

Note that the initial temperature of the first food is high, and during the first heating, the food temperature detected by the senna (7) has already reached the second predetermined temperature T2 (20°C) 14 seconds after the start of the 7JO heating. If so, the program immediately moves from the SIG step to steps 811 and subsequent steps, and thereafter the same operations as described above are expressed. This relates to reheating along the dashed line in FIG.

(G) Effects of the Invention According to the present invention, heating can be carried out in a sufficiently appropriate manner without being affected by the physical content of one food item.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an external perspective view, and FIG.
The figure is a sectional view, and FIG. 3 is a block circuit diagram. FIG. 4 shows the characteristics of the temperature detected by the infrared sensor with respect to the food heating time, and FIG. 5 is a flowchart of the microcomputer program. (3)... Heating chamber, (6)... Magnetron, (7
)...infrared rays, (8)...microcomputer.

Claims (1)

[Claims] (1) a heating chamber for storing food; a heating energy supply means for applying heating energy to the food; a temperature detector for detecting the temperature of the food; The heating energy supply means is driven and controlled to perform first heating, and then the heating energy supply means is driven and controlled for a predetermined time depending on the heating status of the food during the first heating to perform second heating. In the electronically controlled cooking appliance, the control unit controls the temperature sensor when a predetermined period of time has elapsed after the temperature detected by the temperature sensor reached a second predetermined temperature during the first heating. a temperature rise value means for calculating a temperature rise value based on the detected temperature of the food; a coefficient storage means for storing a plurality of coefficients predetermined according to the physical content of the food; and a temperature rise determined by the temperature rise value means. Coefficient selection means for selecting a coefficient according to the physical content of the food from the coefficient storage means. A counting means for counting the time required for the first heating, and a time means for multiplying the time counted by the counting means by a coefficient selected by the coefficient selecting means to obtain the time for the second heating. Features an electronically controlled cooker.