JPH02106620A - Rice-cooking electronic oven - Google Patents

Abstract

PURPOSE:To make possible the same rice cooking as an automatic electrical rice cooker by providing a magnetron output control circuit with a program heat mode control means for performing rice cooking in a specified heat control pattern. CONSTITUTION:When rice cooking is started till time t for performing a water absorption process elapses, constant temperature control is performed. When the water absorption process is completed, it is transferred to a cooking-up process, which is heated by a magnetron. The electric power consumption quantity is added as soon as the electric power of the magnetron is controlled as a temperature detection signal from a temperature sensor 12 is compared with the set point on heating electric power. When a rice cooking quantity is large, the added quantity is enlarged. The heating electric power of the magnetron is set on the basis of a rice cooked quantity in order to continue boiling and cook up to turn on a heater 31 and continue heating so as to judge whether or not it reaches rice cooking upper limit temperature. When rice is changed to boiled rice and water is eliminated, the temperature thereof increases by the heater and exceeds the rice cooked upper limit temperature. When the sensor detects that the temperature reaches the rice cooked upper limit temperature, the heater is turned off for switch off magnetron heating to perform the steaming process so as to end the cooking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rice-cooking microwave oven, and particularly to a rice-cooking microwave oven that has various functions of a microwave oven and can also cook rice.

[Conventional technology]

2. Description of the Related Art Conventionally, a microwave oven is an electronic cooking device that effectively applies heating power to cooking materials. A microwave oven directly heats materials using microwaves generated by a magnetron. With this microwave heating, the amount of heating applied to the cooking ingredients can be easily adjusted by time control, and the heating can be done at high temperatures. It is commercially available. Put water and rice in this microwave rice cooker,
If you repeat heat treatment and uneven treatment in the microwave,
I can cook rice. Microwave heating can heat rice to a high temperature in a short time, so the cooking time is short and rice can be cooked quickly.

[Problem to be solved by the invention]

However, when cooking rice in a microwave oven using such a rice-cooking container for a microwave oven, there is a problem in that heating treatment and shading treatment must be repeatedly performed manually, which is very time-consuming. Further, in this case, the time for the heat treatment and the unevenness treatment depend on the judgment of the cook, so there is a problem that uneven cooking may occur depending on the case.

The present invention has been made to solve the above problems.

An object of the present invention is to provide a rice cooking microwave oven that enables rice cooking similar to that of an automatic electric rice cooker.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a rice-cooking microwave oven equipped with a rice-cooking container, a heating magnetron, and a magnetron output control circuit, in which the magnetron output control circuit is configured to heat rice in a predetermined heating control pattern. It is characterized by having a program heating mode control means for performing the following.

Also, a special container for rice cooking and a magnetron for heating.

In a rice-cooking microwave oven equipped with a magnetron output control circuit and a turntable to which a rice-cooking container is attached, a temperature sensor for detecting the temperature inside the rice-cooking container is located in the center of the turntable, and a temperature sensor located near the temperature sensor; Equipped with a sensor section consisting of a heater that heats the rice cooking container,
The present invention is characterized in that the magnetron output control circuit is equipped with a program heating mode control means for heating and cooking rice according to a predetermined heating control pattern.

[Effect]

According to the above-mentioned means, the magnetron output control circuit includes:
A program heating mode control means for heating rice cooking in a predetermined heating control pattern is provided.

As a result, when you put rice and water in a rice-cooking container and place it on the turntable of a microwave oven to cook rice, by setting it to program heating mode, the magnetron output control circuit can be activated with one switch operation. It heats rice according to a predetermined heating control pattern and can cook rice in the same way as an automatic electric rice cooker.

Furthermore, in a rice cooking microwave oven equipped with a rice cooking container, a heating magnetron, a magnetron output control circuit, and a turntable to which the rice cooking container is attached, the temperature inside the rice cooking container is detected in the center of the turntable. and a sensor section consisting of a temperature sensor and a heater located near the temperature sensor and heating the rice-cooking container;
The magnetron output control circuit is equipped with a program heating mode control means for heating rice in a predetermined heating control pattern. This heating mode control means integrates the power consumption due to magnetron heating that performs constant temperature increase control, and performs cooking and heating in a predetermined heating control pattern according to the amount of cooked rice corresponding to the integrated amount. Therefore, in the program heating mode, rice cooking similar to that of an automatic electric rice cooker is possible.

Thereby, a rice-cooking microwave oven is provided that can cook rice in a manner similar to that of an automatic electric rice cooker.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of a rice cooking microwave oven according to an embodiment of the present invention. In FIG. 1, 1 is a rice-cooking microwave oven body, and 2 is a rice-cooking container. 3 is a turntable on which the rice cooking container 2 is placed. In the center of the turntable 3, there is a temperature sensor that detects the temperature inside the rice-cooking container 2 when the rice-cooking container 2 is placed;
A heater is provided near the temperature sensor to heat the rice cooking container 2. In addition, 4 is a rice cooking start switch, 5
is the microwave oven's cooking start switch.

When cooking with a normal microwave oven, microwave cooking is started by setting the cooking time using the timer setting section 6, placing the cooking ingredients on the turntable, closing one door, and pressing the cooking start switch 5. Ru. Also, cooking rice is
Rice cooking is started by putting rice and water in a rice cooking container 2, placing the rice cooking container 2 on a turntable, closing the door, and pressing a rice cooking start switch 4. These microwave oven cooking and rice cooking controls are performed by a magnetron output control circuit, which will be described later.

FIG. 2 is a block diagram schematically showing the configuration of main parts of a rice cooking microwave oven according to an embodiment of the present invention.

In FIG. 2, 2 is a rice-cooking container, 3 is a turntable to which the rice-cooking container 2 can be attached, 10 is a magnetron output control circuit, and 11 is a heating magnetron. Further, 12 is a sensor unit for determining the rice cooking capacity and measuring the temperature. 21 is a container pot exclusively for cooking rice, and 22 is a lid for the container exclusively for cooking rice. The rice cooking container 2 is a rice cooking container pot 21.
and the rice-cooking container lid 22 are both made of non-metallic materials,
The bottom portion that comes into contact with the sensor section 12 is made of metal with good thermal conductivity. Moreover, the rice cooking container lid 22 has a steam exhaust hole.

The sensor section 12 is provided at the center of the turntable 3 and includes a temperature sensor that detects the temperature inside the rice-cooking container, and a heater that is located near the temperature sensor and heats the rice-cooking container. The magnetron output control circuit 10 uses this sensor unit 12 to determine the rice cooking capacity, measure the temperature, and perform on/off control of the heating magnetron 11.
Rice cooking is controlled using a predetermined heating control pattern.

FIG. 3 is a partially sectional view showing an enlarged main part of the sensor section. In FIG. 3, 3 is a turntable, 21 is a rice-cooking pot, and 23 is a sensor contacting part at the bottom of the rice-cooking pot. Further, 31 is a heater, 32 is a temperature sensor such as a thermistor, 33 is a sensor section cover, and 34 is a spring. Due to the force of the spring 34, when the rice cooking container is mounted on the turntable 3, the sensor section 12 moves laterally so as to surely come into contact with the bottom of the rice cooking container.

FIG. 4 is a block diagram showing the configuration of essential parts of the magnetron output control circuit. In FIG. 4, 40 is a magnetron, 41 is a high frequency output circuit for driving the magnetron, and 42 is a control circuit. The control circuit 42 includes a processing device C
The circuit is mainly composed of a microcomputer that includes a PU, a memory RAM, a program memory ROM, an input port having an analog/digital conversion function, an output port that outputs a control output signal, etc., and is capable of program control. Further, 43 is a switch section, 44 is a temperature sensor, 45 is a heater, 46 is a motor driver that drives a turntable motor, 47 is a buzzer, 48 is a power supply circuit, 4
9 is a commercial AC power source.

Next, a rice cooking operation controlled by the magnetron output control circuit including control by the microcomputer configured as described above will be explained.

When you put the desired amount of rice and water in the rice-cooking container 2, attach it to the turntable of the microwave oven, and turn on the rice-cooking start switch 4, the control circuit 42 including a microcomputer will Program memory RO
According to the program stored in M, a program heating process is performed to heat the rice in a heating control pattern.

FIG. 5 is a flowchart showing an example of a rice cooking process in a rice cooking microwave oven that heats rice in a predetermined heating control pattern. First, the outline of the rice cooking heating control shown in FIG. 5 will be explained. In this heating control, a constant temperature is maintained for a certain period of time based on the output of a temperature sensor that measures the temperature of the rice-cooking container in the sensor section, and after a certain period of time, the temperature is increased to a certain level until the rice-cooking container boils. Furthermore, after boiling, heating control is performed using a heating control pattern that heats the rice to the upper limit temperature using heating power set according to the amount of power consumed when the temperature rises at a constant temperature.

When the rice cooking start switch is turned on to start cooking rice, first, constant temperature control is performed in step 50 to perform a water absorption process, and then, in step 51, it is determined whether or not time has elapsed. Until the time elapses, the process returns to step 50 and constant temperature control is performed. The constant temperature control in this water absorption step is carried out to maintain the temperature at, for example, 40° C., and for a period of, for example, about 10 minutes. When the water absorption process in steps 50 and 51 is completed, constant temperature increase control is performed in step 52, power consumption is integrated in the next step 53, and whether or not the boiling temperature has been reached is determined in step 54. judge. Until step 54 determines that boiling temperature has been reached, step 52
The process returns to step 52 and repeats steps 52 to 54. In other words, once the water absorption process is finished, the next step is to move on to the cooking process, where the rice and water in the rice-cooking container are heated with high power using a magnetron. The power of the magnetron is controlled while comparing the temperature detection signal from the temperature sensor with the set value so that the temperature rises at a constant temperature (step 5).
2). Also, at this time, the amount of power of the magnetrons controlled at the same time is integrated. Naturally, if the amount of rice cooked is large, the cumulative amount will be large, and if the amount of rice cooked is small, the cumulative amount will be small. Therefore, the amount of cooked rice can be determined according to this integrated amount (step 53). This state continues until the inside of the rice cooking container boils (step 54).

If it is determined that the boiling temperature has been reached in step 54, 1
Next, in order to maintain boiling and cook, step 5
In step 5, the heating power of the magnetron is set based on the determined rice cooking amount, and in step 56, the heater is turned on. Then, in step 57, it is determined whether the rice cooking temperature has reached the upper limit temperature. If the rice cooking temperature has not reached the upper limit, the process returns to step 57.

The processing from step 55 to step 57 is repeated. If you continue heating in this state, the rice in the rice-cooking container will turn into boiled rice, and once the moisture is gone, the temperature near the temperature sensor will rise due to the heat from the heating heater, exceeding the upper limit temperature for rice cooking. It is detected in step 57. In step 57, when it is detected that the temperature of the rice cooking container has reached the upper limit temperature for cooking rice, in step 58, the heater is turned off and the magnetron heating is turned off, and in step 59
In this step, uneven process control is performed for a predetermined period of time, and the process is terminated. Note that this uneven process control also includes additional cooking control. These rice cooking process controls are similar to rice cooking process controls using a normal electric heater. This embodiment differs in that a heating magnetron is used as the main heating source instead of a heating heater. Thereby, the thermal efficiency of rice cooking heating can be improved, the rice can be cooked in a short time, and the rice can be cooked with less power consumption.

Next, another embodiment will be described. In the rice cooking heating control of the above-described embodiment, after determining the amount of rice to be cooked by integrating the power consumption, the rice is cooked using the heating power set according to the amount of rice to be cooked. By the way, in such rice cooking control, when the amount of rice to be cooked is small, rice cooking and heating may be controlled in a simple form of simply time control without performing temperature detection or the like. The rice cooking control process of such another embodiment will be described next.

FIG. 6 is a flowchart showing another example of rice cooking processing in a rice cooking microwave oven that performs cooking and heating according to a predetermined heating control pattern. In this example of rice cooking processing, heating and cooking of rice is controlled only by time control without particularly taking in temperature or the like from the sensor unit.

When a rice cooking microwave oven performs only such rice cooking processing, a sensor section in the center of the turntable is not particularly required. First, to explain the outline of this rice cooking process, in the initial stage of rice cooking, a water absorption process 60 is performed in which the amount of heating is reduced and the rice absorbs water. Next, a cooking step 61 is performed in which the amount of heating is increased, the temperature is rapidly raised to boiling, and the boiling is maintained.
Thereafter, the rice cooking process is completed by performing the scouring process 62 for a predetermined period of time.

That is, let me explain with reference to FIG. 6.

In step 63, it is confirmed that the rice cooking start switch is turned on, and in step 64, the rice cooking LED is turned on to notify that the rice cooking is being heated in the program heating mode.
(light emitting diode) is turned on. Next step 65
Then, a heating start is performed by turning on the heating magnetron, and the water absorption step 60 is started. Then in step 66 3
After waiting for 00 seconds to elapse, the process proceeds to step 67, where the heating magnetron is turned off to turn off the heating. Then, in step 68, the process waits again for 300 seconds to elapse. As a result, after the water absorption process 60 is completed, the cooking process 61 is entered, and in step 69, heating is started by turning on the heating magnetron again. In this cooking step 61, the heating time is set to be long in order to boil the water and maintain the boiling. That is, in step 70, it is determined whether 600 seconds have elapsed, and magnetron heating is continued during this time.

Then, the cooking process 61 is completed. Next step 71
The process then moves on to the unevenness step 62. In step 71, the heating magnetron is turned off to turn off the heating. Then, in step 72, the process waits for 300 seconds to elapse. After 300 seconds have elapsed, in step 73, heating is started again and additional cooking is performed. The heating time for this additional cooking is short, 60 seconds. That is, in step 74, it is determined that 60 seconds have elapsed, and the unevenness step 62 is ended. Next, step 75
The heating is turned off by turning off the heating magnetron at
Finish heating the rice. Then, in step 76, the rice is cooked LE.
D is turned off, and furthermore, in step 77, a five-buzzer sound is issued to notify that the rice cooking has been completed, and the entire heating process is completed.

The present invention has been specifically described above based on Examples.
It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to cook rice in the same manner as in an automatic electric rice cooker in the program heating mode. A microwave is provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the appearance of a rice-cooking microwave oven according to an embodiment of the present invention. FIG. 2 is a block diagram schematically showing the configuration of main parts of a rice cooking microwave oven according to an embodiment of the present invention. FIG. 3 is a partial sectional view showing an enlarged main part of the sensor section, and FIG. 4 is a block diagram showing the configuration of the main part of a magnetron output control circuit. FIG. 5 is a flowchart showing an example of a rice cooking process in a rice cooking microwave oven that heats rice with a predetermined heating control pattern, and FIG. 2 is a flowchart illustrating an example. In the figure, 1... Rice cooking microwave oven body, 2... Rice cooking container, 3... Turntable, 4... Rice cooking start switch, 5... Cooking start switch, 6... Timer setting section , 10... magnetron output control circuit, 11...
Magnetron, 12...Sensor part, 21...Rice cooking container steel, 22...Rice cooking container lid, 23...Sensor contact part at bottom of rice cooking container pot, 31...Heater, 3
2...Temperature sensor, 33...Sensor part cover, 34
... Spring, 40 ... Magnetron, 41 ... High frequency output circuit, 42 ... Control circuit, 43 ... Switch section, 44 ... Temperature sensor, 45 ... Heater, 46 ...
...Motor driver, 47...Buzzer. 48...Power supply circuit, 49...Commercial power supply.

Claims (6)

[Claims] (1) In a rice-cooking microwave oven equipped with a dedicated rice-cooking container, a heating magnetron, and a magnetron output control circuit, the magnetron output control circuit has a program heating mode control means for heating rice in a predetermined heating control pattern. A rice cooking microwave oven featuring (2) In a rice-cooking microwave oven equipped with a rice-cooking container, a heating magnetron, a magnetron output control circuit, and a turntable to which the rice-cooking container is attached, the temperature inside the rice-cooking container is displayed at the center of the turntable. Programmed heating mode control means for heating rice in a magnetron output control circuit, comprising a temperature sensor for detecting temperature and a heater located near the temperature sensor for heating a rice cooking container; A rice cooking microwave oven characterized by being equipped with. (3) The magnetron output control circuit maintains a constant temperature for a certain period of time based on the output of the temperature sensor that measures the temperature of the rice-cooking container in the sensor section, and after a certain period of time, the temperature rises to a certain level until the inside of the rice-cooking container boils. 3. The rice-cooking microwave oven according to claim 2, wherein the rice-cooking microwave oven according to claim 2 is characterized in that after boiling, the heating control is performed in a heating control pattern in which the rice is heated to the upper limit cooking temperature using the heating power set according to the amount of power consumed when the temperature rises at a constant temperature. . (4) The heater, which is located near the temperature sensor of the sensor unit and heats the rice-cooking container, starts heating immediately after the rice-cooking container boils, and measures the temperature rise in the rice-cooking container;
The rice-cooking microwave oven according to claim 2, characterized in that the rice-cooking container heats the rice until the rice-cooking upper limit temperature is reached. (5) The rice cooking container is made of a non-metallic material, and the portion that the temperature sensor and the heating heater come into contact with is made of a metal having good thermal conductivity. Rice cooking microwave oven as described. (6) The rice-cooking container is equipped with a lid having a steam exhaust hole,
5. The rice-cooking microwave oven according to claim 2, wherein the rice-cooking microwave oven is detachable from the microwave oven main body.