KR950003186B1 - Tableware washing machine using ultrasonic waves - Google Patents

Abstract

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Description

Ultrasonic dishwasher

1 is a perspective view in which the main part of the ultrasonic dishwasher according to the present invention is cut out.

FIG. 2 is an enlarged view of a portion A in FIG. 1.

* Explanation of symbols for main parts of the drawings

11: washing tank 13: bottom

14: small diameter hole 15: bearing

16: motor 17: drive shaft

20: ultrasonic device 30: air pump

33: bubble supply room 50: hollyhock

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for dishware, and more particularly, to a washing machine using ultrasonic waves as washing means and using a bubble generator.

In the general mechanical industry, ultrasonic cleaners have been used to clean machine parts or units.

Such a conventional washing machine puts a cleaning liquid of a type suitable for a cleaning object into a cleaning tank and oscillates an ultrasonic vibrator in the cleaning tank. In cleaning a relatively small mechanical part, ultrasonic waves are emitted from almost all directions around the component. Since it is irradiated, its cleaning effect is large.

However, when a large number of flat plates, such as a dish, are put into a washing tank, the ultrasonic waves are reflected from there even though they sufficiently reach one dish, and thus do not reach the dish placed inside, and thus the washing effect is low.

Moreover, in order to solve this drawback, when sufficient space is ensured between plates and ultrasonic waves reach each plate, the washing tank will become extremely large and cannot be put into practical use.

Due to these problems and other reasons, ultrasonic waves have not been conventionally applied to dishwashers.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an ultrasonic dishwasher having a simple structure, high washing ability, miniaturization, and no need for detergents to allow pollution-free drainage.

According to the present invention, a supersonic generator is disposed in a metal washing tank, a bubble generator is provided at the bottom of the washing tank, and the bubble generator is provided with a bubble supply chamber at the bottom of the washing tank, and an air pump is provided in the bubble supply chamber. In addition to the connection box, the above-mentioned conventional problems are solved by forming a plurality of small diameter holes in the bottom of the cleaning tank so as to be formed.

The ultrasonic frequency of the ultrasonic generator is determined according to the material of the tableware, but the range is 15-50KHz.

Therefore, it is good to allow the optimum frequency to be selected within the above range according to the material of the tableware.

In addition, it is preferable that the ultrasonic vibrator disposed in the cleaning tank has no directivity so that the ultrasonic waves propagate evenly to the surroundings.

In the case of a directional vibrator, a plurality of vibrators may be provided in each direction, or diffuse reflection may be performed around the entire surface by diffuse reflection.

Thereby, the restriction | limiting about the shape of a washing tank can be made small.

The cleaning tank is made of metal in order to effectively reflect ultrasonic waves, but there is no problem as long as the surface of the cleaning tank is coated with a thin synthetic resin to prevent rust.

In addition, the washing tank may have any shape.

The bubble supply device may supply air to the cleaning tank through the porous material, or may provide a plurality of sintered holes at the bottom of the cleaning tank to supply air thereto. In addition, in order to reduce the amount of water consumed by the washing machine of the present invention, the drain port and the water supply port can be connected through a filter to recycle the dirty water by washing.

In addition, if the drain port and the water supply port are connected via a filter, since no detergent is used at this time, the filter is purified and then recycled and returned to the apparatus cleaning tank, but can be reused as a rinse water.

In order to wash the dishes in the above-mentioned washing machine, when enough water is put into the washing tank, the dishes are put in, and the ultrasonic generator and the bubble generator are operated, the ultrasonic waves reach the surface of the dishware and there the cavitation ( Bubbles are generated by the cavitation effect, and the bubbles are separated and removed from the surface of the dishes.

Here, the ultrasonic waves reach the tableware by reflecting directly from the ultrasonic generator and on the inner wall of the washing tank.

The cleaning action by this phenomenon is the same as the conventional one.

In this case, the amount of air dissolved in the ultrasonic cavitation generator of the ultrasonic wave decreases gradually, and thus the cavitation effect, that is, the cleaning ability, decreases. none. However, in the present invention, since the bubbles are sequentially supplied into the water by the bubble supply device and a part thereof is dissolved in the water, air is always supplied in the water, so that the degree of occurrence of the cavitation does not decrease. .

In addition, since the remainder of the bubble rises in the water, the ultrasonic waves are diffusely reflected to enter the extremely narrow gap between the plates, so that the ultrasonic waves are uniformly irradiated on all the dishes such as dishes.

The reflection of the ultrasonic waves by this bubble is caused by the large difference in the acoustic impedance of water and air.

Therefore, in the apparatus of the present invention, the dishware can be put in an integrated state in a washing tank in a disordered form.

As described above, the washed dishes are dried by rinsing by other means.

Moreover, when dishwasher is arrange | positioned in a washing tank and it can be taken out freely, taking out the dishes after washing becomes extremely easy.

When the dish support member is rotated and combined with the rotating drive shaft and the coupling installed in the washing tank, the dishes are subjected to ultrasonic irradiation in an extremely uniform state, and the cleaning effect is further increased. Is improved.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail, referring drawings.

In FIG. 1, the code | symbol 11 is a spherical metal washing tank which opened upward.

In addition, the metal cover body 12 which forms a part of a spherical body is attached to the said opening to open and close freely, and in order to maintain water-tightness when the cover of the opening of the cleaning tank 11 or the cover body 12 is closed and sealed. It is desirable to install the packings.

In that case, if the air vent hole is provided in the top part of the cover body 12, water can be filled to the vicinity of the top part, and space utilization efficiency improves.

In addition, by bringing the washing tank closer to the spherical shape, the ultrasonic waves reflected from the inner wall of the washing tank are uniformly spread in the washing tank.

Many small diameter holes 14 are provided in the bottom face 13 of a washing tank.

The ultrasonic generator 20 is installed in the bottom surface close to the wall surface of the cleaning tank 11, and the vibrator 21 protrudes upwards from the bottom surface 13 of the cleaning tank 11, and the seal 22 is formed at the base. By the watertight state.

The outer periphery of the vibrator 21 is provided with a basket 23 of a metal mesh having a relatively thin mesh.

In addition, the ultrasonic generator 20 can select an optimal frequency in the range of 15-50 KHz according to the type of dishes by a dial (not shown).

In the center of the washing tank 11, the dish holder 50 is arrange | positioned so that it can be taken out freely. As for the hollyhock 50, metal spokes 52 are radially provided in the lower part of the center column 51, and the base 53 which hangs a cup etc. is radially provided in the upper part. The dish holder 50 is rotatably supported by a thrust bearing 15 provided at the center of the bottom surface of the cleaning tank 11 at the flange provided at the lower end of the support column, and on the lower surface of the cleaning tank 11. The drive shaft 17 of the attached motor 16 is engaged with the thrust bearing 15 described above.

That is, the radial end portion 18 which engages in the circumferential direction with each other, as shown in FIG. 2, shows the lower end surface of the support 51 and the upper end surface of the drive shaft 17 of the motor 16. By installing the angle 19), the support 51 is inserted into the thrust bearing 15 to act as a shaft joint so that the support is rotated by the motor.

The bubble supply chamber 33 which covers the bottom face of the washing tank 11 is formed by the bottom plate 32 under the washing tank 11.

An air pump 30 is attached to the outer circumferential upper position of the cleaning tank 11 to form a bubble supply device for feeding air into the bubble supply chamber 33 through the pipe 31.

The bubble supply device may be formed so as to supply air into the cleaning tank through the porous material.

Both the drain port 34 of the bottom face 13 of the cleaning tank 11 and the drain port 35 of the bottom face of the bubble supply chamber 33 are led to the switching valve 40.

The switching valve 40 connects the drain pipe 41 to one of the openings so as to enable the discharge of unnecessary water, and the other opening is connected to the pump 43 via the filter 42.

The pump is connected to a water intake valve 44 attached to the water supply pipe 45 at the upper position of the outer periphery of the cleaning tank.

In addition, the code | symbol S has shown the frame outline of a washing tank.

Next, the cleaning procedure by the apparatus of the present embodiment will be described.

First, an appropriate amount of water corresponding to the amount of tableware is put into the washing tank 11 from the water supply pipe 45.

At this time, the switching valve 40 is in the closed state with respect to the pump 43.

Next, the dishes to be washed are put into the washing tank 11 described above.

When the dish holder 50 is used here, the flower pot 50 is pulled out of the washing tank, the dish is placed between the metal flesh 52, and the cup 53 is put on a cup, and then the plate holder 50 is placed. The strut 51 is inserted into the thrust bearing 15 to be engaged with the drive shaft 17 of the motor 16.

Next, after setting the frequency of the ultrasonic wave generator 20 to a value suitable for the material of the tableware, the switch is turned ON.

Then, the ultrasonic vibrator 21 generates ultrasonic waves, and a part of the ultrasonic waves passes through the metal net of the protective basket 23 or diffusely reflects there, and directly reaches the dishware, and otherwise with the cleaning tank 11. After reflecting off the inner wall, the dishes are reached.

In addition, the dish holder 50 starts to rotate slowly.

On the other hand, at the same time as or after the operation of the ultrasonic generator, the air pump 30 is also operated to absorb the atmospheric air, which is fed into the bubble supply chamber 33 through the pipe 31.

The air is bubbled from the many small-diameter holes 14 on the upper surface of the bubble supply chamber 33 (that is, the bottom face 13 of the cleaning tank) to raise the water vapor of the cleaning tank 11.

When the bubble rises in water vapor, part of it is dissolved in water, and others reach the upper surface of the water in a bubble state.

The ultrasonic waves are diffused by the rising bubbles and spread more uniformly in the cleaning tank 11.

Ultrasonic waves that reach the tableware in this state generate bubbles by the cavitation on the surface of the tableware, and the bubbles separate foreign matter or foreign matter from the surface of the tableware.

At that time, the air dissolved in the water due to the cavitation becomes a bubble and rises, so that bubbles due to the cavitation will gradually become difficult to be generated. Therefore, the above cavitation can always generate bubbles constantly.

In this way, dirt and other foreign matters on the tableware are completely removed.

Next, after the ultrasonic generator 20 and the air pump 30 are stopped, the switching valve 40 is opened toward the drain pipe 41 to completely discharge the water in the cleaning tank 11 and the bubble supply chamber 33. Complete the wash.

In addition, after taking out the hollyhock 50, if rinsing is performed by a shower etc., washing | cleaning becomes more perfect.

When the next cleaning is performed without performing the above drainage, the switching valve 40 is switched to the pump 43 and the pump is started.

Then, when the above water to be drained is completely purified through the filter 42 and then re-injected into the washing tank 11 via the water intake valve 44 by the pump 43, when only the filter 42 is replaced. The water can be used as a rinsing water instead of reuse or the above-described shower, thereby saving water.

The present invention as described above allows the dishware to be washed by ultrasonic waves while supplying air bubbles to the water vapor, and has the following effects.

(1) Ultrasonic waves are diffused by bubbles, and bubbles enter into a narrow gap between tableware. Ultrasonic waves are widely spread on all dishes even when the dishes are packed tightly and disorderly.

(2) As described above, dishware can be piled up in an orderly manner, so the cleaning tank is extremely miniaturized and the price of the apparatus can be reduced.

③ Since no detergent is used, it is economical and does not cause so-called drainage pollution by the cleaner.

Moreover, since water quality and water temperature are not selected and used, the washing | cleaning effect does not fall in any water.

(4) The use of a filter makes it possible to recycle water, and the water saving effect is great in the case of washing with a large amount of water or a small amount of water at once.

Claims (5)

The ultrasonic generator 20 is disposed in the metal washing tank, and a bubble generator is installed at the bottom of the washing tank 11, and the bubble generator is provided with a bubble supply chamber 33 at the bottom of the washing tank, and the bubble is provided. An ultrasonic dishwasher formed by connecting an air pip 30 to a supply chamber and providing a plurality of small diameter holes 14 at the bottom of the washing tank. The ultrasonic dishwasher according to claim 1, wherein the ultrasonic frequency of the ultrasonic generator 20 is 15-50KHz. The ultrasonic dishwasher according to claim 1, wherein said washing tank (11) has a dish holder (50) therein. The ultrasonic dishwasher according to claim 3, wherein the dish holder is rotatably supported and coupled to the rotary driving device. The ultrasonic dishwasher according to claim 4, wherein the dish holder (50) has a shaft fitting portion detachably coupled to the drive shaft (17) of the rotary drive device and can be taken out of the washing tank.

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