JPH04161726A - Cooking utensil - Google Patents

Abstract

PURPOSE:To prevent the practice of poor-finished heating in advance by announcing an error when the temperature of a heating chamber drops considerably due to the door opening and fails to exceed a certain temperature (lower than required temperature for preheating). CONSTITUTION:When a door 3 is opened so as to house food in a heating chamber 2, a control section 7 shuts off power supply to a heater 6. When restart is indicated with a keyboard 4, the control section 7 performs affirmative consideration and a thermistor 9 inputs the in-chamber temperature detected. Then, the control section 7 compares the input detected temperature with a specific temperature which is lower than a required preheating temperature by k deg.C. When the opening time of the door 3 is long and hence the heated chamber especially preheated is cooled to a considerable extent, the detected temperature is lower than the specific temperature with regards to the above comparison. In this case, the control section 7 does not carry out heating operation and drives an error annunciator 10 for error warning. This construction makes it possible to prevent the operation of undesirable food heating under insufficient preheating conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a cooking appliance that, after preheating the heating chamber, stores food in the heating chamber and heats the food with a heater.

(b) Conventional technology In a cooker that preheats the heating chamber, then stores food in the heating chamber and heats the food with a heater, the door that closes the heating chamber is opened once when storing the food in the heating chamber. As a result, the preheated heating chamber gets cold. This becomes more noticeable the longer the door is open, and the heating performance deteriorates.

Japanese Patent Laid-Open No. 61-282725 discloses a technique for forcibly turning on the heater for a certain period of time when the heater starts heating after preheating in order to cope with the fact that the heating chamber cools down when the door is opened. ing.

However, if the door is open for a long time and the inside of the heating chamber has cooled considerably, forcing the heater to be turned on for the certain period of time is insufficient, and the finished heating cannot be improved.

(c) Problems to be Solved by the Invention The present invention aims to prevent heating that would result in poor finished product in a configuration in which food is stored in the heating chamber and heated by a heater after preheating in the heating chamber. It is.

(D) Means for Solving Problems The present invention provides a heating chamber for storing food, a heater for raising the temperature in the heating chamber, a temperature detector for detecting the temperature in the heating chamber, and a heating chamber for storing food in the heating chamber. and a control unit that controls driving of the heater based on the temperature detected by the temperature sensor to preheat the inside of the heating chamber to a desired temperature before storing food and heating the food in the heater. In the cooking device, the control unit includes a comparison means for comparing the temperature detected by the temperature sensor and a certain temperature lower than the desired temperature when heating the food after preheating with the heater, and the result of the comparison by the comparison means; The present invention is characterized in that it is provided with an error notification means for notifying an error in the notification section when the detected temperature is lower than a certain temperature.

(e) Operation When heating food with the heater after preheating in the heating chamber, if the temperature in the heating chamber drops considerably with the opening of the door and is lower than a certain temperature (lower than the desired temperature at the time of preheating), an error notification is performed. This prevents heating with a poor result.

(f) Example FIG. 1 shows the structure of a cooking device according to an embodiment of the present invention.

A heating chamber 2 for storing food is provided in a cooking device main body 1, and this heating chamber 2 is opened and closed by a door 3. Also,
A keyboard 4 for setting heating conditions and the like is provided on the front right side of the cooking device main body 1.

FIG. 2 shows the circuit of the cooking device. It is located in the heating chamber 2, generates heat by receiving power from the commercial power source 5, and generates heat in the heating chamber 2.
A heater 6 is provided to raise the temperature inside.

On the other hand, a control section 7 is provided, which is composed of a microcomputer or the like and controls the cooking appliance. Around this control unit 7, there is provided the keyboard 4, a door switch 8 that turns off and on based on the opening and closing of the door 3, and a temperature sensor that is attached to the outer wall of the heating chamber 2 and detects the temperature inside the heating chamber. That is, a thermistor 9, an error alarm 10, a relay 11 for controlling power supply to the heater 6, and a magnetron (not shown) are arranged. Therefore, the control section 7
drives and controls the error alarm 10, relay 11, and magnetron based on input information from the keyboard 4, door switch 8, and thermistor 9.

FIG. 3 shows the flow of the control program installed in the control section 7. As shown in FIG. The operation of the cooking device will be explained below according to the same figure.

When cooking with preheating is set and a start instruction is issued using the keyboard 4, the control unit 7 first sets the relay 1 in step S1.
1 to supply power to the heater 6 and cause the heater 6 to generate heat. As a result, the temperature inside the heating chamber 2 increases.

The control section 7 controls the thermistor 9 in the following step S2.
Input the temperature in the heating room detected by the controller, and in step S3,
It is determined whether the detected temperature thus input has reached a predetermined desired preheating temperature. If a negative determination is made in step S3, the control section 7 goes through 88 steps similar to step S1, and then sets the preheating temperature attainment flag P. No judgment is made in step S9 in which it is judged whether or not D is set. The control section 7 then cycles through steps S2, S3, S8, and S9 until the detected temperature reaches the desired preheating temperature.

When the preheating progresses and the detected temperature reaches the desired preheating temperature, the control section 7 exits the above-mentioned circulation execution at step 53 and determines that it is no longer necessary at step 84, which is the same as step S9.
Next, in step S5, the preheating temperature attainment flag P! II
D is set, a preheating alarm (not shown) notifies the arrival of the preheating temperature, and in step S7 the relay 11 is stopped to cut off the power supply to the heater 6. As a result, the temperature inside the heating chamber gradually decreases.

Thereafter, the control unit 7 performs S2, S3, S4, S7, S9, depending on whether the detected temperature has reached the desired preheating temperature.
Execute the StO steps cyclically, S2, S3, S8,
S9: Execute the SIO step in a circular manner. Therefore, the heating chamber temperature is maintained at the desired preheating temperature. In step S10, the control unit 7 determines whether the door 3 is opened or closed via the door switch 8.

Now, when the door 3 is opened to store the food in the heating chamber 2 based on the preheating temperature attainment notification, the control section 7 cuts off the power supply to the heater 6 in step Sll, which is similar to step S7. Then, the food is stored in the heating chamber 2 and the door 3 is opened.
When the computer is closed and a restart instruction is issued using the keyboard 4, the control unit 7 makes an affirmative determination in step S12 to determine whether or not there is a restart instruction.
In the same way as in the step, the temperature inside the heating room detected by the thermistor 9 is input. Next, in step S14, the control section 7 calculates a value based on the detected temperature input in this way and the desired preheating temperature.
Compare with a specific temperature that is lower by C. These 514 steps correspond to the comparison means of the present invention.

As a result of this comparison, if the detected temperature is equal to or higher than the specific temperature, the control section 7 controls the power supply to the heater 6 via the relay 11 to heat the food with the heater in step S15.

On the other hand, when the heating chamber, which has been preheated for a long time when the door 3 is open, becomes considerably cold, the detected temperature becomes lower than the specific temperature in the above comparison. Without doing so, the above error alarm 1
0 is driven to notify an error. This prevents food from being heated with poor quality under insufficient preheating conditions. The above 516 steps correspond to the error notification means of the present invention.

(g) Effects of the Invention According to the present invention, in a configuration in which food is stored in the heating chamber and heated by a heater after preheating in the heating chamber, it is possible to prevent heating that would result in poor finished product, and to improve practical cooking. equipment can be provided.

[Brief explanation of the drawing]

The drawings relate to a cooking appliance according to an embodiment of the present invention; FIG. 1 is an external perspective view, FIG. 2 is a circuit diagram, and FIG. 3 is a flowchart of a control program. 2...Heating chamber, 6...Heater, 7...Control unit, 9
...Thermistor, 10...Error alarm.

Claims (1)

[Claims] (1) A heating chamber that stores food, a heater that increases the temperature in this heating chamber, a temperature detector that detects the temperature in the heating chamber, and stores food in the heating chamber and heats the food with the heater. In the cooking device, the cooking device includes a control unit that controls driving of the heater based on the temperature detected by the temperature sensor and preheats the inside of the heating chamber to a desired temperature, the control unit including a control unit that controls the heater to heat the food after preheating. a comparison means for comparing the temperature detected by the temperature sensor and a certain temperature lower than the desired temperature; and if the detected temperature is lower than the certain temperature as a result of the comparison by the comparison means, an error is notified by the notification section. A cooking appliance characterized in that it is provided with an error notification means for performing.