JP2979421B2 - Cooker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device for controlling the temperature of an empty chamber heated to a high temperature due to, for example, an operation error.

[Prior art] 300 ° C. oven, 300
There is a heating cooker having the function of the ℃ grill, and these functions have increased the cooking menu, which is convenient for the user.

[Problems to be solved by the invention] However, in the conventional heating cooker as described above,
If the auto key of the 300 ° C oven or 300 ° C grill is set incorrectly without placing the object to be heated in the chamber, the temperature of the empty chamber will be 300 ° C or higher as shown in Fig. 4. As a result, electric / electronic parts, lead wires and other parts are damaged, causing a problem of electric shock and fire.

The present invention has been made to solve such a problem, and even if an automatic key of a 300 ° C. oven and a 300 ° C. grill is erroneously set, the inside temperature is controlled to prevent an electric shock and a fire due to breakage of parts. It is an object of the present invention to obtain a cooking device capable of heating.

[Means for Solving the Problems] A heating cooker according to the present invention is a heating cooker having a heater for heating an object to be heated in a refrigerator and a temperature sensor for detecting a temperature in the refrigerator. When the inside temperature reaches the predetermined temperature T1 ° C. within the first predetermined time t1 from the start and the interior is determined to be empty, time counting is started, and the counting time reaches the second predetermined time t2. And a controller for controlling the heating by the heater so that the internal temperature becomes lower than a preset high-temperature cooking temperature.

[Operation] In the present invention, the control unit sets the internal temperature to the predetermined temperature T1 ° C. within a first predetermined time t1 from the start of heating by the heater.
Is reached, it is determined that the inside of the refrigerator is empty, and time counting is started. Then, when the count time reaches the second predetermined time t2, the heating by the heater is controlled so that the internal temperature becomes lower than the preset high-temperature cooking temperature.

Embodiment FIG. 1 is a block diagram illustrating an embodiment of the present invention.
FIG. 2 is a characteristic diagram of the internal temperature according to the invention, and FIG. 3 is a flowchart for explaining the operation.

In FIG. 1, (1) is an automatic key of, for example, a 300 ° C. oven or a 300 ° C. grill. By selecting these keys, the object to be heated can be cooked at a high temperature. (2) is a timer which starts counting time in response to a signal input from an automatic key, and sets the output signal to "1" after a first predetermined time t1 (for example, 10 minutes) has elapsed. (3) is an inverter gate, and the output signal is "1" while the timer (2) is counting time. (4) is a temperature sensor for detecting the internal temperature of the cooking device.

(5) is a comparator, which determines based on the temperature detected by the temperature sensor, and the temperature is determined to be a predetermined temperature T1 ° C. (for example, 250 ° C.)
Is reached, the output signal is set to "1". (6) is AND
When the signal from the comparator (5) is input while the output signal “1” of the inverter gate (3) is being input to the gate, the output signal is set to “1”. (7) is a timer, AND
It operates in response to the input of the signal from the gate (6) to start counting time, and outputs a signal for controlling a heater circuit (not shown) after a second predetermined time t2 (for example, 15 minutes) has elapsed.

The control unit (10) is composed of the timers (2) and (7), the inverter gate (3), the comparator (5), and the AND gate (6).

The operation of the cooking device configured as described above will be described with reference to FIG. For example, when an automatic key (1) for a 300 ° C. oven is turned on, a heater (not shown) generates heat and heats the inside of the refrigerator. At this time, the control unit (10) determines the internal temperature based on the temperature detection from the temperature sensor (4) (S
1) When the internal temperature reaches a predetermined temperature T1 ° C. (250 ° C.), it is determined whether or not it is within a first predetermined time t1 (10 minutes) (S2). When the interior of the cooking device is empty, the temperature of the interior of the cooking appliance is reduced to a predetermined temperature T1 ° C (25 minutes) within the first predetermined time t1 (10 minutes).
(0 ° C.), the operation proceeds to step 3 and starts counting time. When the second predetermined time t2 (15 minutes) has elapsed from the start of counting (S4), a signal for controlling the heater circuit is output (S5), the above-described count value is reset, and the operation ends (S6). . Thereby, the heater circuit controls the heater so that the internal temperature becomes close to the predetermined temperature T1 ° C. (250 ° C.).

In addition, when an object to be heated is in the refrigerator, it takes a first predetermined time t1 (10 minutes) or more until the temperature in the refrigerator reaches the predetermined temperature T1 ° C. (250 ° C.). Therefore, the operation proceeds from step 2 to step 6 to reset the counted value and end the operation.

[Effects of the Invention] As described above, according to the present invention, when the internal temperature reaches the predetermined temperature T1 ° C within the first predetermined time t1 from the start of heating,
It judges that the inside of the refrigerator is empty, starts counting time, and controls the heating by the heater when the count time reaches the second predetermined time t2, so that the temperature inside the refrigerator is set to a preset high-temperature cooking. Since the temperature is set lower than the temperature, even if the interior of the empty storage is heated, there is no damage to the components due to the high temperature, and the effect of preventing electric shock and fire due to the damage can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining an embodiment of the present invention, FIG. 2 is a characteristic diagram of the internal temperature according to the present invention, FIG. 3 is a flowchart for explaining the operation, and FIG. It is a characteristic diagram. In the figure, (1) is an automatic key, (2) and (7) are timers, (3) is an inverter gate, (4) is a temperature sensor,
(5) is a comparator, and (6) is an AND gate. In the drawings, the same reference numerals indicate the same or corresponding parts.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24C 1/00 F24C 7/04 301

Claims (1)

(57) [Claims] 1. A heating cooker having a heater for heating an object to be heated in a refrigerator and a temperature sensor for detecting a temperature in the refrigerator, wherein the inside of the refrigerator is heated within a first predetermined time t1 from the start of heating by the heater. When the temperature reaches the predetermined temperature T1 ° C. and the interior is determined to be empty, time counting is started, and when the count time reaches the second predetermined time t2, the heating by the heater is controlled to A heating cooker comprising a control unit for controlling the internal temperature to be lower than a preset high-temperature cooking temperature.