JP2000146194A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain optimum cooking conditions by providing a temperature sensing means for sensing a temperature in a heating chamber, and variably outputting a heater according to a temperature in the chamber before starting cooking. SOLUTION: When a food is placed in a heating chamber and a desired cooking menu is selected from a data base in a memory 11 by an operation of an operating unit 9, a cooking cycle responsive to an amount of food is calculated from a weight or the like of the food by an arithmetic unit 10. When a cook start switch provided in the unit 9 is pressed, automatic cooking is started, and a temperature in the chamber is measured by a temperature sensor 7. The temperature of the chamber is compared with a predetermined temperature by the unit 10. If the temperature of the chamber is higher than 100 deg.C, a heating output of a heater 3 set to the cooking cycle is, for example, corrected to a heating output of 90%. Since an output of a magnetron 2 at this time is not affected by an influence of the temperature of the chamber, it is not altered as retained set in the cycle as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device, and more particularly to a cooking device such as a microwave oven provided with a heater and a microwave generator.

[0002]

2. Description of the Related Art In a conventional microwave oven, when a desired cooking menu is selected by a user, a heater and a magnetron for generating microwaves are driven in accordance with a cooking cycle according to the cooking menu, and automatic cooking is performed. It has become.

[0003] During the automatic cooking, if other cooking is being performed before the cooking, the temperatures of the heating chamber and the heater before the cooking have risen. As a result, if the heater is driven at an output in accordance with a predetermined cooking cycle, overheating may occur and optimal cooking may not be performed. For this reason, a method has been adopted in which the temperature in the heating chamber is detected, and when overheating occurs, the heating time of the heater is shortened to finish cooking.

[0004]

However, depending on the type of microwave oven, since the heater and the magnetron are driven simultaneously, shortening the heating time of the heater also shortens the heating time of the magnetron. As a result, for example, there has been a problem that the surface of the food is burnt well, but the interior is not yet finished.

[0005] It is an object of the present invention to provide a heating cooker which can obtain optimum cooking conditions by changing heating conditions according to a state before cooking.

[0006]

According to a first aspect of the present invention, there is provided a temperature detecting device for detecting a temperature in a heating chamber, wherein a detection result of the temperature detecting device before the start of cooking is provided. The output of the heater is varied according to the temperature. According to this configuration, when a cooking start command is input by the user, the temperature in the heating chamber is detected, and when the temperature is higher than a predetermined temperature, the heating output of the heating heater is set to be reduced, and the cooking cycle is started. You.

The invention according to claim 2 further comprises an elapsed time detecting means for detecting an elapsed time after the end of the immediately preceding cooking, wherein the detection result of the elapsed time detecting means before the start of the cooking and the heating in the immediately preceding cooking are provided. It is characterized in that the output of the heater can be varied according to the conditions. According to this configuration, when a cooking start command is input by the user, the lapse of time after the end of the last cooking is detected, and the temperature in the heating chamber is estimated from the lapse of time and the heating conditions in the last cooking. If the temperature is higher than the predetermined temperature, the heating output of the heater is set to be reduced, and the cooking cycle is started.

According to a third aspect of the present invention, there is provided an operation switch for lowering the heating output of the heater under a predetermined heating condition by an operation before the start of cooking. According to this configuration, when the user determines that the temperature in the heating chamber has risen due to the last cooking, the heating output of the heating heater is set to a low value by operating the operation switch, and a cooking start command is input by the user. Then, the cooking cycle is started in that state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the microwave oven according to the first embodiment of the present invention. The microwave oven 1 is composed of a microcomputer or the like and controls the microwave oven 1; a magnetron 2 for generating microwaves; a heater 3 for heating food; and a display unit for displaying the progress and settings of a cooking cycle. 4. Input / output unit 5 for driving a light, a cooling fan, etc. and detecting the weight of food and opening / closing of a door of a heating chamber, a power supply unit 6 for supplying power to a control unit 12, and a temperature sensor for measuring the temperature of the heating chamber 7, a timer 8 for detecting a cooking time and the like, an operation unit 9 for selecting a cooking menu and setting cooking conditions, and a calculation unit 1 for calculating a cooking cycle and the like.
0 and a storage unit 11 for storing a cooking menu and the like.

When a food is placed in the heating chamber and a desired cooking menu is selected from a database in the storage unit 11 by operating the operation unit 9, a cooking cycle corresponding to the amount of the food is calculated from the weight of the food. The calculation is performed by the unit 10. Then, when a cooking start switch provided on the operation unit 9 is pressed, automatic cooking is started. Figure 2 is a flowchart of automatic cooking.
First, the temperature T0 in the heating chamber is measured by the temperature sensor 7 in # 21.

In step # 22, the temperature T0 of the heating chamber and the predetermined temperature T
c (for example, 100 ° C.) is performed by the arithmetic unit 10, and when the temperature T0 of the heating chamber is higher than 100 ° C. (Tc), the heating output of the heater 3 set in the cooking cycle is set at # 23 in # 23. On the other hand, the heating output is corrected to, for example, 90%. At this time, since the output of the magnetron 2 is hardly affected by the temperature of the heating chamber, it is not changed while being set in the cooking cycle.

Then, heating is performed by the heater 3 and the magnetron 2 in accordance with the cooking cycle corrected in # 24, and when the elapse of the set cooking time is detected by the timer 8 (# 25), the cooking is completed. With this configuration, even if the temperature of the heating chamber rises before the start of cooking, overheating does not occur, and heating by the magnetron is performed according to a predetermined cooking cycle. Therefore, optimal cooking can be performed.

Next, a microwave oven 1 according to a second embodiment of the present invention has a configuration similar to that of the first embodiment, and a flowchart of automatic cooking is as shown in FIG. When the cooking menu is selected and the cooking cycle is calculated and the automatic cooking is started, the temperature in the heating chamber is estimated from the immediately preceding cooking state in # 22. For example, if the last cooking has been heating by the heater 3 for 5 minutes or more, and if not more than 1 minute and 30 seconds have passed since the end of cooking, it is estimated that the heating room is in a high temperature state.

In this case, if the heating by the heater 3 is performed for 5 minutes or more, the timer 8 is operated for 1 minute and 30 seconds after the completion of cooking, and the next operation for starting cooking is performed while the timer 8 is operating. Can be determined based on whether The determination may be made including the information on the heating output of the heater 3 in the immediately preceding cooking.

If it is determined that the temperature of the heating chamber is higher than the predetermined temperature, the heating output is corrected to, for example, 90% of the heating output of the heater 3 set in the cooking cycle in # 23. At this time, since the output of the magnetron 2 is hardly affected by the temperature of the heating chamber, it is not changed while being set in the cooking cycle.

Then, heating is performed by the heater 3 and the magnetron 2 in accordance with the cooking cycle corrected in # 24, and when the elapse of the set cooking time is detected by the timer 8 (# 25), the cooking is completed. . In this way, as in the first embodiment, even if the temperature of the heating chamber rises before the start of cooking, overheating does not occur, and heating by the magnetron is performed according to a predetermined cooking cycle. Therefore, optimal cooking can be performed.

Next, a microwave oven 1 according to a third embodiment of the present invention has the same configuration as the first and second embodiments.
In the present embodiment, when the user determines that the temperature in the heating chamber has risen due to the last cooking, the cooking menu is selected and the cooking cycle is set by the calculation of the calculation unit 10, and then the cooking cycle is provided in the operation unit 9. By operating the power down key, the heating output of the heater can be reduced.

When the cooking start switch of the operation unit 9 is pressed to start automatic cooking, the flow chart of FIG. 4 is performed, and it is determined at # 22 whether or not the power down key is turned on. When the power down key is turned on, the heating output of the heater 3 set in the cooking cycle in step # 23 is corrected to, for example, 90% of the heating output. At this time, since the output of the magnetron 2 is hardly affected by the temperature of the heating chamber, it is not changed while being set in the cooking cycle.

Then, heating is performed by the heater 3 and the magnetron 2 in accordance with the cooking cycle corrected in # 24, and when the elapse of the set cooking time is detected by the timer 8 (# 25), the cooking is completed. . In this way, as in the first and second embodiments, overheating does not occur even if the temperature of the heating chamber increases before the start of cooking, and heating by the magnetron is performed according to a predetermined cooking cycle. Therefore, optimal cooking can be performed.

In the above embodiment, the microwave oven has been described. However, the same constitution can be applied to other heating cookers, so that optimal cooking can be performed.

[0021]

According to the first aspect of the present invention, since the heating output of the heater is varied according to the temperature of the heating chamber measured prior to cooking, overheating is prevented and heating by the magnetron is performed in the cooking cycle. It is possible to perform optimal cooking.

According to the second aspect of the present invention, the heating output of the heating heater is varied according to the temperature of the heating chamber estimated from the immediately preceding cooking situation prior to cooking, so that overheating is prevented and the magnetron is used. Heating can be performed according to the cooking cycle, and optimal cooking can be performed.

According to the third aspect of the present invention, the heating output of the heater is reduced by the user according to the immediately preceding cooking situation prior to cooking, so that overheating is prevented and heating by the magnetron is performed according to the cooking cycle. Can be performed, and optimal cooking can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a microwave oven according to a first embodiment of the present invention.

FIG. 2 is a flowchart of automatic cooking in the microwave oven according to the first embodiment of the present invention.

FIG. 3 is a flowchart of automatic cooking in a microwave oven according to a second embodiment of the present invention.

FIG. 4 is a flowchart of automatic cooking in a microwave oven according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microwave oven 2 Magnetron 3 Heater 4 Display part 5 Input / output part 6 Power supply part 7 Temperature sensor 8 Timer 9 Operation part 10 Operation part 11 Storage part 12 Control part

Claims (3)

[Claims] 1. A cooking device comprising a temperature detecting means for detecting a temperature in a heating chamber, wherein an output of a heating heater is varied according to a detection result of the temperature detecting means before the start of cooking. . 2. An apparatus according to claim 1, further comprising an elapsed time detecting means for detecting an elapsed time after the end of the immediately preceding cooking, and outputting an output of the heater according to a detection result of the elapsed time detecting means before the start of the cooking and a heating condition in the immediately preceding cooking. A heating cooker characterized by being variable. 3. A heating cooker comprising an operation switch for lowering a heating output of a heater for a predetermined heating condition by an operation before the start of cooking.