JPH0416246A - Automatic rice washing apparatus - Google Patents

Abstract

PURPOSE:To uniformly wash the rice in a rice washing tank by supplying rice washing water in the polished rice received in a rice washing tank and injecting compressed air toward the lower end opening part of a guide cylinder. CONSTITUTION:A guide cylinder 5 is fixed at the axial center in a cylindrical rice washing tank 1 and, an opening and closing lid 16 opening and closing a rice taking out port 4a, is provided to the upper end of the rice washing tank 1. After rice washing water W1 is supplied to the polished rice R1 received in the rice washing tank 1, compressed air is injected toward the lower end opening part 5a of the guide cylinder 5 from the jet pipe 18 provided to the opening and closing lid 16. As a result, the rice in the rice washing tank can uniformly be washed by air jet streams of low pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to an automatic rice washing device that washes rice by injecting water into milled rice and stirring the rice with jetted air.

``Conventional technology'' The rice washing methods used in conventional automatic rice washing and rice cooking devices include a wet rice washing method in which the rice in the rice washing tank is washed with a jet of water, and the other is a wet rice washing method in which the rice in the rice washing tank is washed by jets of water to create friction between the rice grains. There is a dry rice washing method.

``Problems to be Solved by the Invention'' In both the wet rice washing method and dry rice washing method, the rice washing tank is packed with rice grains at a considerable density, so it takes a very long time to make the rice grains fluid. Since the rice grains will not flow unless water or air is jetted or spouted under high pressure, the pressure system becomes large. Further, even if the rice grains flow, they do not flow uniformly in the rice washing tank, so that some rice grains are partially washed and some rice grains are not washed enough, resulting in uneven rice washing accuracy. Especially when using the wet rice washing method, the rice is wet, so
Many rice grains adhere to various parts of the rice washing tank, and technology to prevent these rice grains from adhering is extremely difficult. It is difficult to quickly and efficiently separate the rice polishing liquid from the rice grains. There were drawbacks such as difficulty in distinguishing between water and water for cooking.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an automatic rice washing device that can uniformly wash rice grains in a rice washing tank using a small pressure air jet.

"Means for Solving the Problems" The present invention consists of a cylindrical rice washing tank l, a guide cylinder 5 fixed at the center of the shaft inside the rice washing tank l, and a take-out port provided at the lower end of the rice washing tank 1. and an opening/closing lid 16 that opens and closes the rice washing tank 1. After supplying rice washing water Wl to the polished rice R1 filled in the rice washing tank 1, the compressor is configured to inject water toward the lower end opening 5a of the guide cylinder 5. It is characterized by what it did.

"Operation" The compressed air that has entered the lower end opening 5a of the guide tube 5 is radially injected to the outside of the guide tube 5 from the upper end opening 5b of the guide tube 5.
After descending in the rice water mixture of rice milling R1 and rice washing water W1, it circulates again by entering the lower end opening 5a of the guide tube 5. Further, the lower end opening 5a of the guide tube 5
When entering the rice washing tank 1 again, the compressed air that is being injected toward the lower end opening 5a of the guide tube 5 generates an ejector effect and increases the pressure, so the air inside the rice washing tank 1 is washed with a small pressure air jet. The polished rice R1 can be washed uniformly and in a short time, and the air compression system can be downsized.

"Example" Figure 1 shows an automatic rice washing bag according to the present invention! FIG. 2 is a vertical cross-sectional view of the rice washing device in a state where the rice water mixture is discharged after washing the rice.

In the drawing, the cylindrical rice washing tank l is composed of a large diameter part 2, a hopper part 3 with an inclination angle α connected to the lower end of the large diameter part 2, and a small diameter part 4 connected to the lower end of the hopper part 3. The lower end opening 4a of the small diameter portion 4 serves as a take-off exit.

Further, a guide cylinder 5 that is open vertically stands upright at the center of the axis inside the rice washing tank l. The guide tube 5 has a diameter smaller than the small diameter portion 4, and a conical dispersion umbrella 6 is fixed to the upper end opening 5b by a support 7 so as to be spaced apart from the upper end opening 5b.

The lower end opening 5a of the guide cylinder 5 is located at the connecting part between the hopper part 3 and the small diameter part 4 of the rice washing tank l, and the upper end opening 5b is located approximately at the center of the large diameter part 2 of the rice washing tank l. It is set up to do so.

The opening of the large diameter portion 2 is closed by a lid 8, and a cylinder 9 that is open upward and downward is fixed in the center of the lid 8, and a hopper 10 is disposed above the cylinder 9. Polished rice is supplied from this hopper 10 into the rice washing tank 1 through the cylinder 9.

In addition, in the large diameter portion 2, near the opening,
Along its inner peripheral surface, a flow groove 12 with an open upper surface is formed by a shape member 11 consisting of a bottom plate and side plates.

Furthermore, a water supply pipe 13 for washing and cooking rice is connected to the outer periphery of the large-diameter portion 2 at a position directly below the flow groove 12 so as to open into the large-diameter portion 2 . Also, drain pipe 1
4 is directly connected to open into the flow groove 12. Although not shown, a solenoid valve is interposed in the middle of the water supply pipe 13 for washing and cooking rice.

On the other hand, an open/close lid 16 that can be opened and closed with a hinge 15 is provided at the uncollected outlet of the lower end opening 4a of the small diameter portion 4 of the rice washing tank l. do.

Furthermore, an air jet pipe 18 and a drain pipe 19 are connected to the center and sides of the opening/closing lid 16 so as to open into the rice washing tank l. In addition, on the top surface of the opening/closing lid 16,
A net 20 is stretched to prevent rice grains from being washed away from a drain pipe 19 during draining.

Further, although not shown, flexible pipes are connected to the air jet pipe 18 and drain pipe 19 so as not to interfere with the opening/closing operation of the opening/closing lid 16. Although not shown, a solenoid valve is interposed between the air jet pipe 18 and the drainage pipe 19.

Reference numeral 21 denotes a rice cooker disposed directly below the rice washing tank 1, and the rice cooking heat source used is an appropriate one such as an electric type, a gas type, or a microwave type.

"Operation of the Embodiment" Therefore, when washing rice, the lower end opening of the rice washing tank l is closed by the opening/closing lid 16, and the solenoid valve of the drain pipe 19 is closed, making it impossible to drain water. .

When a predetermined amount of polished rice R1 is supplied from the hopper 10 through the cylinder 9, the polished rice R1 hits the dispersion umbrella 6 and is filled into the rice washing tank 1 while being dispersed radially. Therefore,
The rice does not flow into the guide tube 5 and it is in a hollow state.

Next, after opening the solenoid valve of the water supply pipe 13 for washing and cooking rice and supplying water Wl for washing rice from the supply pipe 13 into the rice washing tank 1, air at a predetermined pressure is injected from the air jet pipe 18.
After the injected air passes through the rice grains in the small diameter portion 4 of the rice washing tank 1, it enters from the lower end opening 5a of the guide cylinder 5 that stands upright at the axis of the rice washing tank 1, and enters the dispersion umbrella 6 from the upper end opening 5b. It collides, turns over, and is ejected radially toward the rice washing water Wl.

Therefore, bubbles are generated in the rice washing water Wl, and the mixture of the rice washing water Wl and the polished rice R1 descends on the outside of the guide cylinder 5 from the upper end opening 5b of the guide cylinder 5, and enters from the lower end opening 5a. It circulates and flows.

Therefore, the air bubbles have the effect of generating ultrashort waves to remove the bran from the rice grains R1, and the rice water mixture that enters the lower end opening 5a from the outside of the guide tube 5 is transferred from the air jet tube 18 to the guide tube. The air injected into the lower end opening 5a of 5 creates a negative pressure around the lower end opening 5a and is suddenly sucked into the lower end opening 5a, so that the pressure inside the guide tube 5 is increased due to its ejector effect. . As a result, the flow rate of the rice water mixture is accelerated, so the cleaning effect is greatly improved, and sugar is removed from the rice grains.The sugar is mixed with the rice washing water W1 to become a polishing liquid, and solid-liquid separation is performed. .

By the way, above! While the self-injected air is being blown out, rice washing water W1 is continuously supplied from the rice washing/cooking water supply pipe 13, and the rice washing water (sharpening liquid) mixed with sugar is drained from the flow groove 12. It is drained through pipe 14. In this way, the rice washing water W1 in the rice washing tank 1 is gradually purified.

When the above-mentioned rice washing work is completed, the solenoid valves of the water supply pipe 13 for washing and cooking rice and the air jet pipe 18 are closed to stop the supply of rice washing water W1 and air, and then the solenoid valve of the drain pipe 19 for draining is opened. Then, the polishing liquid in the rice washing tank 1 is completely drained from the drain pipe 19. At this time, since the net 20 is stretched over the top surface of the opening/closing lid 16, the rice grains will not be discharged from the drain pipe 19.

Next, when the discharge of the above-mentioned sharpening liquid is completed, as shown in FIG. 2, after closing the solenoid valve of the water drain pipe 19, the solenoid valve of the water supply pipe 13 for washing and cooking water is opened and the water is supplied. A predetermined amount of rice cooking water W2 is supplied from the pipe 13. When the supply of the rice cooking water W2 is finished, the actuator 17 drives the opening/closing lid 16 to instantly open the rice outlet of the rice washing tank 1, and the washed rice R2 in the rice washing tank 1 is removed. drops together with the rice cooking water W2 and is filled into the rice cooker 21. Thereafter, the rice cooker 21 described above is transferred to a predetermined rice cooking device and rice is cooked therein.

"Other Embodiments" FIG. 3 is a longitudinal cross-sectional view showing a rice washing tank 1 of another embodiment.
It has a truncated conical shape, and its slope closes the rice outlet 4a. This opening/closing lid 16 is installed with a hinge 15 so that it can be opened and closed as in the previous embodiment. Further, in the center of the opening/closing lid 16, an ejector tube 22 having a small diameter 22a near its upper portion is fixed upright, and its upper end is positioned near the small diameter portion 22a of the ejector tube 22.

Further, an air injection pipe 24 is fixed to the side surface of the ejector pipe 2 so as to open into the ejector pipe 22. Although not shown in the drawings, a net is stretched over the top opening of the ejector tube 22 to prevent rice grains from flowing into it.

Further, the drain pipe 19 is fixed by passing through a nut 25 screwed and fixed to the outer periphery of the small diameter part 4 of the rice washing tank 1 and the side wall of the small diameter part 4. The other structures are the same as those in the above embodiment.

Therefore, when washing rice, the opening/closing lid 16 injects water at a predetermined pressure from the tip opening of the compressed water supply pipe 23 toward the top opening of the ejector pipe 22, and at the same time injects air into the ejector pipe 22 from the air injection pipe 24. When injected, the pressure of the air is increased due to the ejector effect, and the lower end opening 5 of the guide cylinder 5
It is injected towards a.

Further, the polishing liquid after washing the rice is discharged from a drainage pipe 19 provided in the small diameter portion 4 of the rice washing tank 1. Other operations are similar to those in the above embodiment.

"Effects" As described above, the present invention includes a cylindrical rice washing tank 1, a guide tube 5 fixed at the center of the shaft inside the rice washing tank 1, and a rice outlet 4a provided at the lower end of the rice washing tank 1 for opening and closing. The rice washing tank L is configured with an opening/closing lid 16 that allows rice washing water W to be supplied to the rice milled rice R1 filled in the rice washing tank L.
1 is supplied, compressed air is injected toward the lower end opening 5a of the guide tube 5.

Therefore, the compressed air that has entered the lower end opening 5a of the guide tube 5 is radially jetted out of the guide tube 5 from the upper end opening 5b of the guide tube 5, and flows into the rice water mixture of milled rice R1 and rice washing water Wl. After descending, it enters the lower end opening 5a of the guide tube 5 again, thus circulating.

Moreover, when compressed air is injected into the rice washing water W1 from the upper end opening 5b of the guide tube 5, air bubbles are generated in the rice washing water W1, but these air bubbles generate ultrashort waves, so that rice sugar can be easily removed from the polished rice R1. It has the effect of removing

Furthermore, when the compressed air that has descended through the rice water mixture enters the lower end opening 5a of the guide tube 5 again, the compressed air being injected toward the lower end opening 5a of the guide tube 5 causes an ejector effect. occurs and the pressure increases.

As a result of the above, the polished rice R1 in the rice washing tank 1 can be washed uniformly and in a short time by a small pressure air jet, and the air compression system can be downsized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the automatic rice washing device according to the present invention during rice washing, Fig. 2 is a longitudinal sectional view of the same rice washing device in a state where the rice water mixture is discharged after washing the rice, and Fig. 3 FIG. 2 is a longitudinal cross-sectional view of the main parts of the automatic rice washing device according to the embodiment. 1...Rice washing tank, 2...Large diameter cylindrical part, 3...Funnel part, 4...Small diameter cylindrical part, 4a...Rice removal port 5...Guide tube, 5a...Lower end Opening part, 5b... Upper end opening, 6... Dispersion umbrella, 10... Hopper, 12... Flow groove, 13... Water supply pipe for washing and cooking rice, 14...
discharge pipe, 16... opening/closing lid, 17... actuator,

Claims (9)

[Claims] (1) Consists of a cylindrical rice washing tank, a guide cylinder fixed at the center of the shaft inside the rice washing tank, and an opening/closing lid that opens and closes the rice outlet provided at the lower end of the rice washing tank, and the rice is filled into the washed rice layer. An automatic rice washing device characterized in that the automatic rice washing device is configured to inject compressed air toward the lower end opening of the guide cylinder after supplying rice washing water to the polished rice. (2) The automatic rice washing device according to claim 1, characterized in that a compressed air injection means is provided on the opening/closing lid of the rice washing tank. (3) The automatic rice washing tank according to claim 1 or 2, wherein the rice washing tank is constructed by connecting a large diameter part, a funnel part having a predetermined inclination angle, and a small diameter part. Device. (4) The automatic rice washing device according to claim 1, 2, or 3, characterized in that a float groove is provided around the inner peripheral surface of the large diameter portion of the rice washing tank. (5) The rice washing tank is connected to a drain pipe that opens into the float groove and a water supply pipe for washing and cooking rice that opens directly below the float groove. Alternatively, the automatic rice washing device according to item 2, 3, or 4. (6) The automatic rice washing apparatus according to claim 1 or 2 or 3 or 4 or 5, characterized in that a hopper for supplying polished rice is provided on the top surface of the rice washing tank. . (7) The opening and closing lid is configured to be opened and closed by an actuator. Automatic rice washing device. (8) The diameter of the guide tube is set smaller than the diameter of the small diameter portion of the rice washing tank. The automatic rice washing device according to item 6 or 7. (9) Claim 1 or 2, characterized in that a dispersion umbrella is provided at a distance from the upper end opening of the guide tube.
The automatic rice washing device according to item 1 or 3 or 4 or 5 or 6 or 7 or 8.