JPH0661304B2 - Cooking device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cooking device such as a rice cooker having a steaming function.

In the conventional cooking device, when steam cooking is performed, heating is performed so that water boils and steam is generated, and the steam generated is used for cooking. It was general that the cooking was performed and the cooking was terminated after the cooking time had elapsed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional cooker, when performing steam cooking, heating is performed until the water boils, so that when the amount of water is large or when water is added in the middle, etc. Has a problem that the boiling detection cannot be detected for a long time, so that the temperature of the cooker body rises abnormally and becomes dangerous.

An object of the present invention is to provide a cooker that solves such problems.

Means for Solving the Problems In order to solve the above problems, the cooking device of the present invention is a container for containing food and water, a starting means for starting cooking, and a heating means for heating and cooking the food, Boiling detection means for detecting that the water in the container has boiled, first timer means for starting timing by the output of the starting means, and outputting after a predetermined time has passed, and the first timer means. The second timer means for starting the timing of steam cooking when the boiling detection means detects the boiling of water, and when the predetermined time by the second timer means has elapsed. And a control means for controlling the heating means so as to end the steam cooking.

Action According to the above configuration, the water in the container is heated to boil by the heating means, and when the boiling detection means detects this boiling,
The second timer means starts timing of steam cooking,
In this case, the boiling of water in the container cannot be detected for a long time, and when the predetermined time of the first timer means, which starts counting the time from the start of cooking, has passed earlier, the boiling detection is not performed even if the boiling is not detected. The second timer means can start timing of steam cooking.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a cooking device according to an embodiment of the present invention, in which 1 is a starting means for starting cooking,
Reference numeral 2 is a container for containing food and water, 3 is heating means for heating and cooking food, 4 is boiling detection means for detecting that the water in the container 2 is boiling, and 5 is output from the starting means 1. The first timer means 6 which starts the clocking by means of and outputs after the lapse of a predetermined time, 6 receives the output of the first timer means 5, or the boiling detecting means 4 detects boiling of water. In this case, the second timer means 7 for starting the timing of steam cooking is a control means for controlling the heating means 3 so that the second timer means 6 finishes the cooking when a predetermined time is reached. .

FIG. 2 shows a concrete circuit diagram of the cooking device in one embodiment of the present invention. In FIG. 2, 10 is a start switch for starting cooking, and 11 is a heater for heating the food. , 12 are relays for energizing the heater 11, and have a relay coil 12a and a relay contact 12b. 13 is a relay drive unit for driving the relay 12, 14 is a thermistor for detecting the temperature of steam when the water in the container 2 is boiling, and 15 is an A / D converter for converting the output signal from the thermistor 14 into A / D. A / D converter, 16 is an input unit for inputting signals from the start switch 10 and the A / D converter 15, and 17 is a relay contact 12b forming the relay 12 to open and close to energize the heater 11. An output unit, 18 is a control unit that controls the output unit 17 according to a signal input from the input unit 16, and 19 is a microcomputer including the input unit 16, the output unit 17 and the control unit 18. is there.

FIG. 3 is a flow chart showing the operation of the microcomputer 19, and the operation will be described based on this flow chart.

First, in step 21, the heat power is set to zero. Next, in step 22, it is determined whether or not the start switch 10 is pressed, and steps 21 to 22 are executed until it is pressed.
repeat. Then, if the start switch 10 is pressed, the routine proceeds to step 23, where the maximum heating power is set to prepare for cooking and boil the water in the container 2. In step 24, the first timer means 5 measures time. And step 2
If the first timer means 5 does not reach the predetermined time in 5, the routine proceeds to step 26. In this step 26, A
The / D converter 15 determines whether or not the water in the container 2 has boiled, and if not, returns to step 23,
Steps 23 to 27 are repeated. Step two
It is judged that it has boiled in step 7, or step 25
Then, if the first timer means 5 reaches the predetermined time, the routine proceeds to step 28. In step 28, the heating power for steam cooking is set, and in step 29, the second timer means 6 is set.
Keep time. Then, in step 30, it is judged whether or not the second timer means 6 has reached the predetermined time required for cooking. on the other hand,
When the second timer means 6 has reached the predetermined time in step 30, the process proceeds to the ending step of step 31.

Effects of the Invention According to the present invention, as is clear from the description of the above embodiments,
Even if boiling cannot be detected, such as when the amount of water used for steam cooking is large, when water is added in the middle, or when there is a foreign substance in the boiling detection unit, timing is started from the beginning of cooking. When the predetermined time by the first timer means has elapsed, the second timer means starts measuring the cooking time, and when the predetermined time by the second timer means elapses, the heating power becomes zero. The main body of the cooker does not rise to a dangerous temperature in continuous operation, and as a result, steam cooking can be performed with peace of mind.

[Brief description of drawings]

FIG. 1 is a block diagram of a cooking device showing an embodiment of the present invention,
FIG. 2 is a concrete circuit diagram of the cooking device, and FIG. 3 is a flowchart showing the operation of the microcomputer in the cooking device. 1 ... Starting means, 2 ... Container, 3 ... Heating means, 4 ...
Boiling detecting means, 5 ... First timer means, 6 ... Second timer means, 7 ... Control means, 19 ... Microcomputer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinzo Kon No. 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. In the company

Claims (1)

[Claims] 1. A container for containing food and water, a starting means for starting cooking, a heating means for heating and cooking the food, and a boiling detection means for detecting that the water in the container has boiled. , First timer means for starting timing by the output of the starting means and outputting after a predetermined time elapses, and when the output of the first timer means is obtained, or the boiling detection means boils water Second timer means for starting the timing of the steam cooking when detecting the time, and control means for controlling the heating means so as to end the steam cooking when a predetermined time by the second timer means has elapsed. Cooker with.