JPH05115802A - Rice washing machine - Google Patents

Abstract

PURPOSE:To provide a rice washing machine capable of realizing proper rice washing by controlling a rice washing process by detection of turbidity of rice washing water. CONSTITUTION:A rice washing machine is constituted of a rice washing tank 2, a water feeder l. for supplying rice washing water, a drainage device 5, an impeller 6 causing rice washing water flow, a motor 7 for driving this impeller 6, a turbidity sensor 5 for detecting turbidity of rice washing water, a judgment part 12 which decides the rice washing conditions such as rice washing time and the number of times in rice washing by detection value of this turbidity sensor 5 and a controlling part 13 for controlling the water feeder 4, the drainage device 5 and the motor 7 in accordance with the controlling command sent from this judgment part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice washing machine used at home, for industrial purposes and the like.

[0002]

2. Description of the Related Art In a conventional rice washing machine, rice was washed in a fixed sequence regardless of the amount of rice and how the bran was dropped.

[0003]

However, in the above method, since the sequence is designed so that the degree of rice washing becomes good at the rated capacity, there is a problem that wasteful washing water and electric power are consumed when a small amount of rice is consumed. However, there was a problem that if the rice was washed with more than the rated capacity, it would become unwashed rice. Further, there is a problem that it is impossible to finish the degree of rice washing desired by the user.

The present invention is intended to solve such a problem, and the first object is to detect the turbidity of the washing water and determine the washing conditions such as the washing time and the number of washings, so that there is no excess or deficiency. The purpose is to provide a rice washing machine for washing rice.

A second object of the present invention is to provide a rice washing machine which can detect the amount of rice and determine the water supply time to improve the detection accuracy and suppress the consumption of wasted rice washing water. It is a thing.

A third object of the present invention is to provide a rice washing machine capable of further increasing the detection accuracy by detecting the amount of rice and determining the water supply level and further suppressing the waste of the washing water. It is what

A fourth object of the present invention is to provide a rice washing machine capable of obtaining good bran removal regardless of the amount of rice by detecting the amount of rice and determining the rotation speed of the motor. It is a thing.

A fifth object of the present invention is to provide a rice washing machine capable of performing a rice washing at a rice washing degree suitable for a user by inputting a desired degree of rice washing.

[0009]

[Means for Solving the Problems] A first means of the present invention for achieving the above first object is to provide a tank for washing rice, a water supply device for supplying washing water, a drainage device, and a washing water flow. A stirring blade to raise, a motor to drive this stirring blade, a turbidity sensor that detects the turbidity of the washing water, and a determination unit that determines the washing conditions such as the washing time and the number of washings from the detection value of this turbidity sensor. , The water supply device according to a control command from the determination unit,
The rice washing machine is composed of a drainage device and a control unit for controlling a motor.

The second means of the present invention for achieving the second object is provided with a rice amount sensor for detecting the amount of rice, and the judging section determines the water supply time according to the detected value of the rice amount sensor. It is the rice washing machine to be decided.

A third means of the present invention for achieving the third object is provided with a rice amount sensor for detecting the amount of rice and a water level sensor for detecting the water level to be supplied, and the judging section is the rice amount. The water supply level is determined according to the detection value of the sensor, and the control unit is a rice washing machine that supplies water up to the water level determined by the determination unit based on the detection value of the water level sensor.

According to a fourth means of the present invention for achieving the fourth object, the judging section determines the rotation speed of the motor according to the detection value of the rice amount sensor, and the control section decides the judging section. The rice washing machine controls the motor so that the rotation speed becomes the same.

Further, a fifth means of the present invention for achieving the fifth object is provided with an operation input section for inputting a desired degree of rice washing, and the judging section carries out rice washing according to an input value from the operation input section. This is a rice washing machine that determines the time and the number of times the rice is washed.

[0014]

The operation of the first means is as follows. That is, the degree of falling of rice bran can be estimated by detecting the turbidity of the washing water with the turbidity sensor. Since the rice washing conditions such as the time for washing rice and the number of times of washing rice are determined according to how much the rice bran has fallen off, proper rice washing can be performed without excess or deficiency.

The operation of the second means is as follows. That is, the water supply time is controlled according to the amount of rice detected by the rice amount sensor, and the rice is washed with the amount of water that matches the amount of rice, so the detection accuracy of the turbidity sensor is increased and the consumption of wasted washing water is suppressed. You can

The operation of the third means is as follows. That is, since the water level sensor supplies water up to the water level corresponding to the amount of rice detected by the rice amount sensor, the detection accuracy of the turbidity sensor is further increased as compared with the case of the second means, and more wasted washing water is consumed. Can be suppressed.

The operation of the fourth means is as follows. That is, by determining the rotation speed of the motor according to the rice amount detected by the rice amount sensor, good bran removal can be obtained regardless of the rice amount.

The operation of the fifth means is as follows. That is, by changing the determination criteria of the washing time and the number of times of washing in accordance with the input value regarding the turbidity that the user likes, it is possible to wash the rice with the degree of washing that suits the user's preference.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, the whole structure of the rice washing machine is as follows: the body 1 of the rice washing machine;
A water supply device 4 for supplying the washing water, a drainage device 5, a stirring blade 6 for causing a flow of the washing water, a motor 7 for driving the stirring blade, and a turbidity sensor 8 for detecting the turbidity of the washing water. It comprises a rice amount sensor 9 for detecting the amount of rice, a water level sensor 10 for detecting the water level via an air trap 16, a control means 14 for controlling rice washing, and an operation input section 15 for inputting the degree of rice washing.

Next, the control of the washing time and the number of washings will be described with reference to FIGS. 1 and 2. The turbidity sensor 8 uses a transmissive optical sensor, and the detection value of the sensor is the light transmittance of the washing water. First, the washing of rice starts with measuring the amount of rice by the rice amount sensor 9. The rice amount sensor 9 uses a weight sensor, and is configured to simultaneously weigh the weight of the contents (rice) installed in the outer tub 3 and the contents of the tub 2. The processing unit 11 of the control means 14 calculates the actual amount of rice from the detection value of the rice amount sensor 9. The determination unit 12 determines the amount of water required for the first and second washings and the motor rotation speed according to the amount of rice. Control unit 1 so that the amount of primary washing water is determined
3 is a water supply device 4 while observing the detection value of the water level sensor 10.
To control the primary water supply. The water level sensor 10 is configured to detect the atmospheric pressure inside the air trap 16.

Immediately after the primary water supply, the controller 13 initializes the light transmittance of the turbidity sensor 8 to a predetermined value P0. After that, the motor 7 is driven to rotate the stirring blades 6 to perform primary rice washing. Then, as the bran dissolves in the washing water, the light transmittance of the washing water decreases. When the light transmittance decreases to a predetermined value P1, the primary washing rice is finished and the motor 7 is stopped. Then, the drainage device 5 is driven to perform primary drainage. Up to this point is the primary polishing step, and the next is the primary rinsing step.

The beginning of the rinsing process starts from the secondary water supply up to the secondary washing water amount determined by the judging unit 12 at the beginning. After water supply, the motor 7 is driven at the motor rotation speed initially determined by the determination unit 12. Then, as in the case of the primary rice washing, the light transmittance of the washing water is lowered. At the point P2 where the reduction in light transmittance is saturated, the secondary washing is finished, the motor 7 is stopped, and then the secondary drainage is performed. At this point, the primary rinsing process ends.

After that, the secondary polishing process and the secondary rinsing process ...
・ If the light transmittance at the saturation point becomes equal to or higher than the reference light transmittance Pe (not shown, set by the user's favorite rice washing degree) when washing rice in the rinsing process , After the drainage, the whole process is finished.

Here, the processing unit 11, the judgment unit 12, and the control unit 13 of the control means 14 can be easily realized by a microcomputer.

Further, as shown in FIG. 3, the operation input section 15 can input the degree of rice washing desired by the user by sliding the operation knob 17, and the determination section 12 determines the input value according to the input value. Reference transparency Pe used for the end determination
To change. For example, the more intense the degree of rice washing is, the higher the reference transmittance Pe is.

[0026]

The rice washing machine of the present invention controls the stroke of rice washing while detecting the degree of falling of rice bran with the turbidity sensor.
Appropriate washing can be done without excess or deficiency.

Further, since the water supply time is controlled according to the amount of rice detected by the rice amount sensor and the amount of water that matches the amount of rice is used for washing the rice, the accuracy of detection by the turbidity sensor is increased and wasteful washing water is consumed. Can be suppressed.

Further, since the water level sensor supplies water up to the water level corresponding to the rice amount detected by the rice amount sensor, the detection accuracy of the turbidity sensor is further increased and the wasteful washing water consumption can be further suppressed. Is.

Further, by determining the rotation speed of the motor in accordance with the amount of rice detected by the amount sensor of rice, good bran removal can be obtained regardless of the amount of rice.

Further, by providing an operation input section for inputting a desired degree of rice washing, it is possible to finish the degree of rice washing desired by the user.

[Brief description of drawings]

FIG. 1 is a block diagram of a rice washing machine showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining a rice washing process of the rice washing machine.

[Fig. 3] Front view of the operation input unit of the rice washing machine

[Explanation of symbols]

 1 main body 2 tank 4 water supply device 5 drainage device 6 stirring blade 7 motor 8 turbidity sensor 9 rice amount sensor 10 water level sensor 11 processing unit 12 judgment unit 13 control unit 14 control unit 15 operation input unit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tadashi Sadahira, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Haruo Terai, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A tank for washing rice, a water supply device for supplying washing water, a drainage device, a stirring blade for causing a flow of washing water, a motor for driving the stirring blade, and a turbidity detecting turbidity of the washing water. Sensor, a determination unit that determines the washing conditions such as the washing time and the number of washings based on the detection value of the turbidity sensor, and a control that controls the water supply device, the drainage device, and the motor according to the control command from the determination unit. Rice washing machine consisting of a part and a part. 2. The rice washing machine according to claim 1, further comprising a rice amount sensor for detecting the amount of rice, and the determining unit determines the water supply time in accordance with the value detected by the rice amount sensor. 3. A rice amount sensor for detecting the amount of rice, and a water level sensor for detecting the water supply level, wherein the judging section determines the water level according to the detection value of the rice quantity sensor, and the control section The rice washing machine according to claim 1, wherein water is supplied up to the water level determined by the determination unit based on the detection value of the water level sensor. 4. The determination unit determines the rotation speed of the motor according to the detection value of the rice amount sensor, and the control unit controls the motor so that the rotation speed determined by the determination unit is reached.
The listed rice washing machine. 5. The rice washing machine according to claim 1, further comprising an operation input section for inputting a desired degree of rice washing, and the judging section determines the rice washing time and the number of times of washing in accordance with the input value from the operation input section.