Portable ultrasonic cleaning machine

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a portable ultrasonic cleaning machine, particularly to a portable ultrasonic cleaning machine which is held in the hand freely and applied to any desired place on a surface to perform cleaning work.

2. Description of Related Art

Conventional washing machines used in households work by having clothes to be cleaned immersed in water, stirred and rubbed, so that dirt is removed from the clothes. A detergent is usually added to increase cleaning effectiveness. However, this has the disadvantage of polluting water that is let out after cleaning and thus harming the environment. Another shortcoming of washing machines is that during stirring and rubbing of clothes the material of the clothes is worn and finally damaged, so that washing machines are not suitable for cleaning clothes of high quality.

To overcome the shortcomings mentioned above, ultrasonic cleaning machines have appeared on the market which generate ultrasound in water, so that micro-sized bubbles are produced which work as cavities for breaking up clusters of water and dirt, resulting in cleaning of immersed clothes.

Ultrasonic cleaning machines have already proven a good cleaning effect. Conventional ultrasonic cleaning machines have been designed for performing cleaning work at fixed positions in households and comercial environments. U.S. Pat. No. 4,727,734 “Ultrasonic Washing Machine” discloses an ultrasonic cleaning machine having a ceramic vessel with a bottom where at a central position an ultrasonic generator is mounted. The ultrasonic generator, using a dual controller, generates ultrasonic waves at adjustable frequencies between 10 kHz and 60 kHz. A motor drives a stirring movement of water in the vessel. By directing the ultrasonic waves to stirred water, vibrational energy leads to the formation of a large number of micro-sized bubbles, which in the stirred water suddenly break up, so that a cleaning effect is achieved.

Ultrasonic cleaning machines, as compared to conventional washing machines, offer reduced consumption of detergent. However, in conventional ultrasonic cleaning machines vibrational energy is distributed over a large space and over large distances, so that attenuation is significant and no concentrated effect is achieved, resulting in ineffective cleaning. Therefore, in conventional ultrasonic cleaning machines, stirring and detergents still have to be relied on for a sufficient cleaning result.

Furthermore, conventional in conventional ultrasonic cleaning machines have been designed for fixed positions only, with no way to detach an ultrasonic wave generating unit and apply it at random, limiting the range of applicability.

SUMMARY OF THE INVENTION

It is the main object of the present invention to provide a portable ultrasonic cleaning machine which is usable while held in the hand and applied to any desired place of clothes to be cleaned.

The present invention has a portable main body, in which an ultrasonic wave genarator is mounted, so that a user, for cleaning clothes at a desired location, brings the ultrasonic wave genarator close, performing cleaning work. Thus cleaning at any desired location is effectively performed without need of a detergent.

The present invention can be more fully understood by reference to the following description and accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown in FIGS. 1-3, the portable ultrasonic cleaning machine of the present invention in a first embodiment comprises: a main body 10; an electric control circuit 20, placed inside the main body 10 and connected with a power source; and an ultrasonic wave generator 30, generating, as controlled by the control circuit 20, ultrasonic vibrations at frequencies between 10 kHz and 60 kHz. Ultrasonic waves produced by the ultrasonic wave generator 30 perform cleaning work at clothes and clothing material.

As shown in FIG. 1, the main body 10 during use of the present invention is held in a hand of a user. The main body 10 has a front end and an inside with an accommodating chamber 11, accommodating the control circuit 20, and a generator chamber 12 close to the front end, in which the ultrasonic wave generator 30 is placed. An opening 13 leads from the generator chamber 12 to the outside, allowing ultrasonic waves generated by the ultrasonic wave generator 30 to be spread outside. A power cable 21 connects the control circuit 20 with an external power source to provide for supply of electric power. A control line 22 connects the control circuit 20 with the ultrasonic wave generator 30, providing for controlling operation thereof. The main body 10 has on an outer side thereof a control lamp 23, indicating operation of the ultrasonic wave generator 30.

Referring again to FIG. 1, the opening 13 is placed on a lower side of the ultrasonic wave generator 30, allowing ultrasonic waves generated by the ultrasonic wave generator 30 to pass to the outside, so that vibrational energy is concentrated on an area covered by the opening 13 for performing cleaning work there. For example, easily dirtied places on clothes, like collars or sleeve, are thus readily cleaned.

Referring to FIG. 3, for applying the cleaning machine of the present invention to a piece of cloth 40, the user first connects the power cable 21 to a power outlet, holds the main body 10 with the hand and places the opening 13 over a spot to be cleaned. Ultrasonic waves generated by the ultrasonic wave generator 30 then perform cleaning work there.

When using the present invention, ultrasonic waves generated by the ultrasonic wave generator 30 are transmitted by air, pure water or water with detergent. If ultrasonic waves are transmitted by air, clth to be cleaned is not immersed in water and the cleaning machine of the present invention is applied directly. Then ultrasonic vibrations break up and remove clusters of dirt on cloth. By soaking or spraying cloth to be cleaned with water and then applying the cleaning machine of the present invention, ultrasonic waves are transmitted partly by air and partly my water or an air-water mixture.

The present invention, as compared to conventional ultrasonic cleaning machines, has as a main characteristic the portable main body 10, allowing for easy moving and carrying around of the present invention, e.g., for traveling, so that great flexibility and convenience of use result.

Furthermore, applying ultrasonic waves generated by the ultrasonic wave generator 30 at a short distance from the opening 13 ensures small attenuation and high and concentrated vibrational energy on any spot of the cloth 40 to be cleaned, making the present invention highly suitable for cleaning limited or very dirty areas of clothes and clothing material. For example, before regular washing, collars or sleeves or stains are exposed to cleaning by the present invention.

Referring to FIG. 4, the present invention in a second embodiment comprises: a main body 50 with an accommodating chamber 51; the electric control circuit 20, placed inside the accommodating chamber 51 and connected with a power source; and an ultrasonic wave generator 70, placed inside a generator chamber 52 on a front end of the main body 50. The generator chamber 52 on a lower side thereof has an opening 53 to the outside. The main body 50, the control circuit 20 and the ultrasonic wave generator 70 of the second embodiment of the present invention are similar to the main body 10, the control circuit 20 and the ultrasonic wave generator 30 of the first embodiment.

The main difference between the first and second embodiments of the present invention lies in that in the second embodiment a holding plate 80 is attached to the lower side of the main body 50. The holding plate 80 has a front end and a rear end. As shown in FIGS. 4 and 5, the rear end of the plate carries two fish plates 81 having a mutual distance that is larger than the width of the main body 50 at the rear end thereof. A bolt 82 is put through the two fish plates 81, providing a hinged connection of the main body 50 with the holding plate 80. Thereby, as shown in FIGS. 4-6, the front end of the main body 50 is readily lifted from the holding plate 80. As shown in FIG. 5, the holding plate 80 in a closed state completely covers the lower side of the main body 50, including the opening 53. In the closed state, a small gap 83 is left between the main body 50 and the holding plate 80.

Referring to FIG. 7, during use of the cleaning machine of the present invention, a piece of cloth 90 to be cleaned is inserted in the gap 83 and held therein by the holding plate 80, making usage easy and convenient. Furthermore, with the holding plate 80 covering the opening 53, ultrasonic waves generated by the ultrasonic wave generator 70 are concentrated on a spot to be cleaned of the cloth 90, increasing cleaning effectiveness.

The holding plate 80 also mechanically guides cloth 90 to be cleaned. As shown in FIG. 8, the present invention in a third embodiment has a guiding device 84 inserted in a depression 842 of the holding plate 80, comprising several parallelly oriented rolls 841 guiding cloth 90 over the holding plate 80. The depression 842 has a front side and a rear side with bearing plates 843 having holes 844 through which axes 845 are put carrying the rolls 841.

Referring to FIG. 9, the present invention in a fourth embodiment has a guiding plate 85 placed on an upper side of the holding plate 80. The guiding plate 85 has a rectangular upper smooth surface 851 and curved edges for minimizing friction.

Referring to FIG. 10, the present invention in a fifth embodiment has a sound absorbing element 86 placed on an upper side of the holding plate 80. The sound absorbing element 86 absorbs ultrasonic waves generated by the ultrasonic wave generator 70, minimizing reflection thereof and thus interference of incident and reflected ultrasonic waves for maximum cleaning effectiveness. The sound absorbing element 86 is a thin plate made of polymolecular material which effectively absorbs ultrasonic waves.

Referring to FIG. 11, the present invention in a sixth embodiment has a sound diffusing element 87 placed on an upper side of the holding plate 80 opposite to the opening 53. The sound guiding element 87 has an upper surface in the shape of several parallel prisms, thus reducing reflection of incident ultrasonic waves.

Referring to FIG. 12, the present invention in a seventh embodiment has a battery 24 substituted for the power cable 21, allowing for operation independent of an external power supply. Of course, the present invention is suitable for DC power supply as well as AC power supply.

As above explanation shows, the present invention provides an ultrasonic cleaning machine that is portable and easy to use and thus not limited to application to households or business environments. The present invention is particularly suitable for cleaning stains and small spots od cloth. Since generated ultrasonic waves are not spread over large distances, attenuation is low and cleaning is effective.

While the invention has been described with reference to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention which is defined by the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional side view of the portable ultrasonic cleaning machine of the present invention in the first embodiment.

FIG. 2 is a perspective view of the portable ultrasonic cleaning machine of the present invention in the first embodiment.

FIG. 3 is a schematic illustration of usage of the portable ultrasonic cleaning machine of the present invention in the first embodiment.

FIG. 4 is a sectional side view of the portable ultrasonic cleaning machine of the present invention in the second embodiment.

FIG. 5 is a perspective view of the portable ultrasonic cleaning machine of the present invention in the second embodiment.

FIG. 6 is a perspective view of the portable ultrasonic cleaning machine of the present invention in the second embodiment in an opened state.

FIG. 7 is a schematic illustration of usage of the portable ultrasonic cleaning machine of the present invention in the second embodiment.

FIG. 8 is a schematic illustration of the portable ultrasonic cleaning machine of the present invention in the third embodiment.

FIG. 9 is a schematic illustration of the portable ultrasonic cleaning machine of the present invention in the fourth embodiment.

FIG. 10 is a schematic illustration of the portable ultrasonic cleaning machine of the present invention in the fifth embodiment.

FIG. 11 is a schematic illustration of the portable ultrasonic cleaning machine of the present invention in the sixth embodiment.

FIG. 12 is a schematic illustration of the portable ultrasonic cleaning machine of the present invention in the seventh embodiment.