JPH11141885A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fully utilize the number of keys of a keyboard while finishing according to an installing region is possible. SOLUTION: An infrared ray sensor 4 which detects the temperature of a foodstuff in a heating chamber for outputting a detection temperature signal, a data conversion means 13 wherein the detection temperature signal of the infrared ray sensor 4 is converted into a temperature data at a specified conversion ratio, and a microcomputer 11 which controls a magnetron 3 based on the temperature of the data conversion part 13 and the input at a keyboard 12 are provided, and by a singular input operation at the keyboard 12, a conversion ratio at which the detection temperature signal of the infrared ray sensor 4 is converted into the temperature data is changed at a conversion ratio converting part 15 of the microcomputer 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cooking device.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 3-208292, there has been an apparatus in which a food temperature is detected by an infrared sensor and heating is controlled based on the detection result.

[0003]

In the above-mentioned conventional technology, in a cooking device, particularly in a microwave oven installed in a convenience store or the like, due to the space of a keyboard,
In some cases, it is not possible to arrange the cooking state adjustment key. In convenience stores, there are many types of foods displayed in stores, and the optimal heating sequence differs for each. So, to improve usability, if you try to register everything in the automatic cooking menu,
Keys are required for each product type. Therefore, there is a demand from a store to which delivery is to be made so that as much automatic cooking as possible can be registered. However, the number of keys that can be increased is limited due to the input port of the microcomputer, and the demand cannot be met. However, in order to answer as much as possible, we want to increase the number of keys even a little, so we eliminate the less frequently used finish adjustment keys and distribute them to other keys. However, elimination of the finish adjustment key caused a problem. It can be said that, depending on the region, there are many people who prefer high cooking temperature and some people prefer low cooking temperature, but with the above-mentioned cooker, the finish of cooking cannot be adjusted, Since the temperature at which all microwave ovens are manufactured is the same, it cannot be adjusted to the conditions in the area where the microwave ovens are installed, which may affect the sales of the store. The present invention is to solve such a problem.

[0004]

According to the present invention, there is provided a heating chamber for storing food, a heating means for heating food in the heating chamber, an input means for inputting a heating condition of the food, and the like; Temperature detecting means for detecting the temperature of the food and outputting a detected temperature signal, data converting means for converting the detected temperature signal of the temperature detecting means into temperature data at a predetermined conversion ratio, temperature data of the data converting means, Control means for controlling the heating means based on the input of the input means, and conversion ratio changing means for changing the conversion ratio in the data conversion means by a unique input operation on the input means. .

[0005] The temperature detecting means is constituted by an infrared sensor.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a food, 2 is a heating chamber for storing the food, 3 is a magnetron serving as heating means for heating the food 1, and 4 is a food chamber disposed above the heating chamber 2. This is an infrared sensor serving as temperature detecting means for detecting a temperature. 2, reference numeral 7 denotes a high-voltage transformer connected to a commercial power supply 5 via a switching circuit 6, reference numeral 8 denotes a high-voltage capacitor, reference numeral 9 denotes a high-voltage diode, and reference numeral 10 denotes a high-voltage capacitor 8 and a high-voltage diode 9. Is connected to the half-wave voltage rectifier circuit 10. A high voltage is applied to the magnetron 3 via the half-wave voltage rectifier circuit 10 every half cycle of the commercial power supply 5, and the magnetron 3 oscillates microwaves for heating the food 1. . Reference numeral 11 denotes a microcomputer serving as control means. The microcomputer 11 includes a keyboard 12 serving as input means for setting a desired heating temperature and the like.
, A temperature signal detected by the infrared sensor 4, and a power frequency pulse from a pulse generator 13 that generates a pulse corresponding to the frequency of the commercial power source 5,
The switching circuit 6 is turned on and off. Based on this ON control, a high voltage is applied to the magnetron 3 every half cycle of the commercial power supply 5 as described above. The microcomputer 11 converts the detected temperature signal of the infrared sensor 4 into temperature data of digital information based on the conversion ratio stored in the storage unit 14 of the external EEPROM so that the microcomputer 11 can process the detected temperature signal in the microcomputer 11. A data conversion unit 13 serving as data conversion means for converting
Conversion ratio changing unit 15 serving as a conversion ratio changing unit for changing the conversion ratio stored in the storage unit by a unique input operation of the keyboard 12.
And The keyboard 12 also includes a start key, a storage key for storing an automatic cooking sequence,
It has a time setting key and a number key for setting the heating time. In describing the operation of the microwave oven, first, in the heating time control, the microcomputer 11 internally generates a time signal based on a pulse from the pulse generator 13, and generates the time signal. , The switching circuit 6 is turned on to execute microwave heating. The time signal is also used for measuring the current time. Next, in the heating temperature control, the microcomputer 11 performs control based on a built-in control program of FIG. When desired heating temperature information and heating start information are input from the keyboard 12, the microcomputer 11
Executes the S1 step, and executes the switching circuit 6
Turn on. Thus, a high voltage is applied to the magnetron 3 every half cycle of the commercial power supply 5 to perform microwave heating. Subsequently, the microcomputer 11 executes S
2. Steps S3 are cyclically executed. In step S2,
It is determined whether the pulse generator 13 has generated a pulse corresponding to the power supply frequency. In step S3, the elapse of one second is determined based on the time signal. In this circulating execution, when a pulse is generated every 1/60 second corresponding to the power supply frequency, for example, 60 Hz, the microcomputer 11 synchronizes with this pulse and causes the microcomputer 11 to perform a half cycle (about 8.3 mm Second), that is, the non-oscillation period,
Execute step S4. In this step, the microcomputer 11 first converts the detected temperature signal of the infrared sensor 4 into temperature data by the data conversion means 13 based on the conversion ratio of the storage unit 14. Then, this temperature data is stored in a microcomputer RA (not shown) in a storage RA
Store or read into M. Since the microwave oscillation is stopped, the temperature data read in this manner is not covered by the microwave and is correct. And 1
Every second, the microcomputer 11 executes step S5 to determine whether the temperature data read into the storage RAM has reached a desired temperature. When determining that the desired temperature has been reached in step S5, the microcomputer 11 executes step S6, turns off the switching circuit 6, and ends the microwave heating. When it is desired to adjust the finished state in this cooker, the conversion ratio in the storage unit 14 may be changed. In this changing method, in FIG. 4, in a state where the heating operation is not performed, the key input of the keyboard 12 is a unique input, for example, a time setting key is operated, and then “1234” is input. When the operation is continuously performed, the unique operation is confirmed in step S10, and the conversion ratio conversion unit 15 sets the conversion ratio change input state. Then, the number of changes is input from the keyboard 12 in step S11. Specifically, 5 ° C
If you want to change to a higher finished temperature, enter +5,
If you want to change the temperature to 5 ° C lower, enter -5. After confirming that the storage key in the keyboard 5 has been operated in step S12 after inputting the changed value, the conversion ratio conversion unit 15 rewrites and stores the changed conversion ratio in the storage unit 14 in step S13. This ends the conversion operation. Thereafter, the detected temperature signal detected by the infrared sensor 4 is changed to temperature data according to the changed conversion ratio, data is processed in the microcomputer 11, and the cooking operation is performed.

[0007]

According to the present invention, the maximum number of keys of the input section can be used, and settings can be made according to the demands of the installation area.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a cooking device according to the present invention.

FIG. 2 is a control circuit diagram of the cooking device of the present invention.

FIG. 3 is an operation flowchart of the microcomputer in FIG. 2;

FIG. 4 is an operation flowchart for changing a conversion ratio to temperature data in a storage unit.

[Explanation of symbols]

 2 heating room 3 magnetron 4 infrared sensor 11 microcomputer 12 keyboard 13 data conversion unit 14 storage unit 15 conversion ratio change unit

Claims (2)

[Claims] 1. A heating chamber for storing food, heating means for heating food in the heating chamber, input means for inputting heating conditions of the food, etc., and a detected temperature signal for detecting the temperature of the food in the heating chamber. A temperature conversion means for converting a temperature signal detected by the temperature detection means into temperature data at a predetermined conversion ratio, and the heating based on the temperature data of the data conversion means and an input of the input means. A heating cooker comprising: control means for controlling the means; and conversion ratio changing means for changing the conversion ratio at the data conversion means by a unique input operation at the input means. 2. The cooking device according to claim 1, wherein said temperature detecting means is constituted by an infrared sensor.