JPH05154043A - Rice boiler - Google Patents

Abstract

PURPOSE:To provide a rice boiler capable of boiling thoroughly rice by boiling rice with electrification rate corresponding to rice and water amounts while the optimum electrification rate varies with the ratio of rice amount to water amount even if a total load is the same. CONSTITUTION:There are provided a heating means 3, a control means 7 for controlling the electrification rate of the heating means 3, a temperature detecting element 4 for detecting the temperature of a dish, a timing means 6 for measuring a time, a weight measuring means 8 for measuring the weight of the dish, a rice amount and water amount judging means 9 for judging the rice and water amounts and an electrification rate determining means 10 for determining the optimum electrification rate by the input of rice and water amounts from the judging means 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker capable of determining the amounts of rice and water to be cooked during rice cooking.

[0002]

2. Description of the Related Art A conventional so-called microcomputer rice cooker cooks rice at an energization ratio according to the total amount of food to be cooked. That is, the energization ratio determining means determines the energization ratio according to the amount of the food to be cooked. This is to determine the total load of rice and water combined from the value detected by the temperature detection element, and to energize accordingly. It determines the ratio.

[0003]

However, even if the total load is the same, the optimum energization ratio differs depending on the ratio between the amount of rice and the amount of water. Therefore, there is a problem that the conventional rice cooker cannot cook rice finely.

The present invention is intended to solve such a conventional problem, and provides a rice cooker which can cook rice at an energization ratio according to the amount of rice and the amount of water of the food to be cooked. It is the first purpose.

A second object is to provide a rice cooker which can easily determine the amount of rice and the amount of water to be cooked.

A third object of the present invention is to provide a rice cooker which can cook rice from the beginning of rice cooking at an energization ratio according to the amount of rice and the amount of water.

[0007]

The first means for achieving the first object of the present invention is to provide a heating means, a control means for controlling an energization ratio of the heating means, and a temperature of an object to be cooked. The temperature detecting element for detecting, the time measuring means for measuring the time, the weight measuring means for measuring the weight of the food, the rice / water amount judging means for judging the rice amount and the water amount, and the rice / water amount judging means The rice cooker is provided with an energization ratio determining means for determining an optimum energization ratio by inputting the amount of rice and the amount of water.

A second means of the present invention for achieving the second object is, in addition to the structure of the first means, a rice / water amount determining means, which is a measurement value of a weight measuring means and a detection of a temperature detecting element. The rice cooker is equipped with a fuzzy reasoner that inputs a value.

Further, a third means of the present invention for achieving the third object is, in addition to the constitution of the first means of the present invention,
The rice cooker is provided with a volume measuring means for measuring the volume of the food to be cooked and a fuzzy reasoning device for inputting the measured value of the volume measuring means and the measured value of the weight measuring means.

[0010]

The operation of the first means of the present invention is as follows. That is, the weight measuring means measures the total weight of rice and water. The rice / water amount determination means determines the rice amount and the water amount, and then the energization ratio determination means determines the optimum energization ratio according to the rice amount and the water amount. Therefore, it functions as a rice cooker that cooks rice at an energization ratio according to the amount of rice and the amount of water.

The operation of the second means of the present invention is as follows. That is, the weight measuring means measures the total weight,
The total heat load of rice and water is determined from the value detected by the temperature detection element. Thus, by utilizing the difference in heat capacity between rice and water, fuzzy inference is used to estimate the amount of rice and the amount of water by the two parameters of the weight and the detection value of the temperature detection element. It functions as a rice cooker that can cook rice at a corresponding energization ratio.

The third means of the present invention operates as follows. That is, the volume measuring means measures the volume of the food. At the same time, the weight measuring means measures the total weight.
In this way, by utilizing the difference in the specific gravity of rice and water, fuzzy reasoning is used to determine the amount of rice and the amount of water before cooking, and it functions as a rice cooker that can cook rice at an energizing ratio according to the amount of rice and water. To do.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a main body, and a heating means 3 composed of a heater and a triac or a heater and a current control circuit is provided at the bottom. Similarly, a control means 7 for controlling the heating means 3 and a weight measuring means 8 for measuring the weight of the food are provided. An upper portion of the main body 1 is detachably covered with a lid 5, and an inner pot 2 is provided inside. A temperature detecting element 4 such as a thermistor for detecting the temperature of the food to be cooked is provided at the center bottom of the inner pot 2. Reference numeral 6 is a time measuring means for measuring time. Reference numeral 9 is the first rice / water amount judging means for judging the amount of rice and the amount of water. Further, 10 is an energization ratio determining means which inputs the amount of rice and the amount of water. Timing means 6
The control means 7, the first rice / water amount determination means 9, and the energization ratio determination means 10 are constituted by a microcomputer in this embodiment.

FIG. 2 shows the construction of the first rice / water quantity judging means 9. The first rice / water amount judging means 9 is a fuzzy reasoner which inputs the temperature rise rate calculated from the measured value of the temperature detecting element 4 and the weight output from the weight measuring means 8 and outputs the rice amount and the water amount. Is. That is, the total heat load of rice and water can be determined from the rate of temperature rise, and the amount of rice and the amount of water can be estimated from two parameters of the weight and the detection value of the temperature detection element from the difference in the heat capacities of rice and water. Therefore,
The amount of rice and the amount of water can be expressed by a non-linear input-output relationship that inputs the temperature rise rate and weight. By using a fuzzy reasoner, this nonlinear input-output relationship can be easily expressed. The rate of temperature increase can be easily obtained by differentiating the output of the temperature detection element 4.

An embodiment of the fuzzy inference device, which is the first rice / water amount judging means 9, will be described with reference to FIGS. The inference rule is, for example, "if the temperature rise rate is small and the weight is large, the amount of rice is normal and the amount of water is small", and it is composed of six rules shown in FIG. The qualitative concept that the rate of temperature rise is “small” or the amount of rice is “small” is quantitatively expressed by the membership function shown in FIG.

Next, the configuration of the energization ratio determining means 10 is shown in FIG.
It will be explained based on. In this embodiment, the energization ratio determining means 1
0 is a fuzzy reasoner that inputs rice amount and water amount and outputs energization ratio. By using this fuzzy reasoner, it is possible to easily represent a complex optimal conductivity ratio determined by the amount of rice and the amount of water.

An embodiment of the fuzzy inference device which is the energization ratio determining means 10 will be described with reference to FIGS. The inference rule is, for example, "If the amount of rice is small and the amount of water is normal,
The energization ratio is made slightly smaller ", and is made up of seven rules shown in FIG. A qualitative concept such as "the amount of rice is" small "or the energization ratio is" slightly small "is quantitatively expressed by the membership function shown in FIG.

As described above, according to this embodiment, it is possible to provide a rice cooker which determines the amount of rice and the amount of water and cooks rice at an energization ratio according to the amount of rice and the amount of water.

In this embodiment, the consequent part variable of the fuzzy inference has a general triangular shape, but it can be realized with a real value or a linear form.

Further, in the present embodiment, the energization ratio is determined by using the output of the rice / water quantity determining means, which is a fuzzy reasoning device that receives the temperature rise rate and the weight, as the input of the fuzzy reasoning device, which is the energization ratio determining device. However, a fuzzy reasoner that inputs the temperature rise rate and weight and outputs the energization ratio may be provided.

Next, a second embodiment of the present invention will be described with reference to FIG.
~ It demonstrates based on FIG. In the present embodiment, the body 1 has a volume measuring means 11 for measuring the volume of the food to be cooked inside the lid 5.
Is equipped with. Further, the main body 1 is provided with a second rice / water amount judging means 12 for judging the amount of rice and the amount of water. In this embodiment, the volume measuring means 11 measures the distance from the lid to the object to be cooked by the ultrasonic sensor, and calculates the volume of the object to be cooked from the measured value by calculation by the microcomputer. The second rice / water quantity determining means 12 is composed of a microcomputer in this embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.

FIG. 9 shows the construction of the second rice / water quantity judging means 12. The second rice / water amount determination means 12 is a fuzzy reasoner that inputs weight and volume and outputs rice amount and water amount. That is, since the specific gravities of rice and water are different, the amount of rice and the amount of water can be determined from the two parameters of weight and volume.

An embodiment of the fuzzy inference device, which is the second rice / water quantity determining means 12, will be described with reference to FIGS.
The inference rule is, for example, "if the volume is small and the weight is normal, the rice amount is small and the water amount is normal", and it is composed of seven rules shown in FIG. A qualitative concept such as “small” in volume or “normal” in weight is quantitatively expressed by the membership function shown in FIG.

As described above, according to the present embodiment, it is possible to provide a rice cooker that determines the amount of rice and the amount of water before starting to cook rice.

In this embodiment, the consequent part variable of the fuzzy inference has a general triangular shape, but it can be realized by a real value or a linear form.

[0026]

As described above, according to the first means of the present invention, the heating means, the control means for controlling the energization ratio of the heating means, the temperature detecting element for detecting the temperature of the food to be cooked, Time measuring means for measuring the time, weight measuring means for measuring the weight of the food to be cooked, rice / water amount judging means for judging the rice amount and water amount, and the rice amount and water amount by this rice / water amount judging means as input A rice cooker capable of cooking rice at an energization ratio according to the amount of rice and the amount of water can be provided by adopting a configuration including an energization ratio determining unit that determines an optimum energization ratio.

Further, according to the second means of the present invention, the fuzzy reasoning device which receives the measured value of the weight measuring means and the detected value of the temperature detecting element as the rice / water amount judging means is provided,
It is possible to provide a rice cooker that can easily determine the amount of rice and the amount of water and can cook rice at an energization ratio according to the amount of rice and the amount of water.

Further, according to the third means of the present invention, by providing the fuzzy reasoning device which inputs the measured value of the weight measuring means and the measured value of the volume measuring means as the rice / water amount judging means,
It is possible to provide a rice cooker capable of determining the amount of rice and the amount of water before the rice is cooked, and capable of cooking rice from the beginning of the rice cooking at an energization ratio according to the amount of rice and the amount of water.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a rice cooker according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the first rice / water quantity determining means.

FIG. 3 is a diagram showing inference rules of a fuzzy inference device, which is the first rice / water quantity determination means.

FIG. 4 is a diagram showing membership functions of the antecedent part and the consequent part of the inference rule of the fuzzy inference device, which is the first rice / water quantity determining means.

FIG. 5 is a block diagram showing the same energization ratio determining means.

FIG. 6 is a diagram showing an inference rule of a fuzzy inferencer that is the same energization ratio determining means.

FIG. 7 is a diagram showing membership functions of the antecedent part and the consequent part of the inference rule of the fuzzy inferencer that is the same energization ratio determining means.

FIG. 8 is a schematic sectional view showing a rice cooker according to a second embodiment of the present invention.

FIG. 9 is a block diagram of the second rice / water quantity determining means.

FIG. 10 is a diagram showing an inference rule of a fuzzy inference device which is the second rice / water quantity determining means.

FIG. 11 is a diagram showing membership functions of the antecedent part and the consequent part of the inference rule of the fuzzy inference device, which is the second rice / water quantity determination means.

[Explanation of symbols]

 3 heating means 4 temperature detecting element 6 timing means 7 control means 8 weight measuring means 9 first rice / water amount judging means 10 energization ratio determining means 11 volume measuring means 12 second rice / water amount judging means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruo Terai, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Masafumi Sadaira, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co.

Claims (3)

[Claims] 1. A heating means, a control means for controlling an energization ratio of the heating means, a temperature detecting element for detecting a temperature of an object to be cooked, a time measuring means for measuring time, and a weight of the object to be cooked. The cooked rice is equipped with a weight measuring means, a rice / water quantity judging means for judging the rice quantity and the water quantity, and an energization ratio determining means for determining the optimum energization ratio by inputting the rice quantity and the water quantity by the rice / water quantity judging means. vessel. 2. The rice cooker according to claim 1, further comprising, as the rice / water amount determining means, a fuzzy inference device which inputs the measured value of the weight measuring means and the detected value of the temperature detecting element. 3. A volume measuring means for measuring the volume of the food to be cooked is provided, and a fuzzy reasoning device for inputting the measured value of the volume measuring means and the measured value of the weight measuring means is provided as the rice / water amount judging means. The rice cooker according to claim 1.