WO2022181882A1

WO2022181882A1 - Piezoelectric ultrasonic wave generating device

Info

Publication number: WO2022181882A1
Application number: PCT/KR2021/005701
Authority: WO
Inventors: 이형규
Original assignee: 주식회사 에스피티
Priority date: 2021-02-25
Filing date: 2021-05-07
Publication date: 2022-09-01
Also published as: KR102282608B1

Abstract

The present invention relates to a piezoelectric ultrasonic wave generating device and, more specifically, a piezoelectric ultrasonic wave generating device comprising: a vibrating body having a hollow shape; a piezoelectric vibrator which is installed in the vibrating body on at least a part of the vibrating body; and an outer protruding portion which extends from the piezoelectric vibrator to at least one of the upper portion and the lower portion, protrudes to the outside from the surface of the vibrating body, and has a portion that extends from the protruding portion into the vibrating body and is configured to come into contact with the piezoelectric vibrator.

Description

Piezoelectric ultrasonic generator

The present invention relates to a piezoelectric ultrasonic wave generator, and more particularly, to an ultrasonic wave generator that can be used in a liquid phase. Provided is a piezoelectric ultrasonic wave generating device that is present in at least two to ensure directionality while concentrating ultrasonic wave generation here.

Piezoelectric ceramics have a variety of uses, and in particular, form a major part of an ultrasonic generator used for cleaning, mixing, and the like. As shown in FIG. 1 , an ultrasonic generator having an ultrasonic generator generally called a BLT (Bolt-clamped Langevin Transducer: BLT) is a piezoelectric ceramics (vibrator) in which metal is bonded to both ends of the shaft. It has a structure in which the main vibration occurs in the direction to generate ultrasonic waves.

In order to deliver the ultrasonic waves generated through this ultrasonic generator (BLT) to the washing material (or mixture), a washing tank is made and an ultrasonic generator is attached to the bottom of the vessel (washing tank) to generate ultrasonic waves. , it is based on the principle of creating instantaneous vacuum (cavitation) in the liquid to remove foreign substances from the cleaning material.

An ultrasonic cleaner made for this purpose is configured to attach a BLT to the bottom of the washing tank and connect a specific AC applied voltage circuit.

However, since the size of the washing tank is determined according to the type, size, and capacity of the washing material according to the purpose of the industrial, home, and commercial ultrasonic cleaners, ultrasonic cleaners having different capacities must be used.

Lens cleaners, glasses cleaners, jewelry, watch cleaners, household cleaners, cocktail mixers, commercial cleaners, industrial cleaners, etc. That is, it causes high cost and inconvenience in use to provide each from the consumer's point of view.

Therefore, it is not limited to the type or shape of the object to be washed, and a universally usable washer is required. It is required to make this possible. Conventional Lanjuban ultrasonic generator (BLT) generates ultrasonic waves smoothly, but the electrical signal terminal is exposed and cannot be contained in solution. have.

To this end, Korean Patent Laid-Open Patent Publication No. 2003-0086556 discloses a "cylindrical ultrasonic cleaning device". In the prior art, a cylindrical ultrasonic generator is coupled to a housing inside a tube, and power is supplied to the cylindrical ultrasonic generator in the radial direction. It vibrates and forms a periodic ultrasonic sound field inside the tube. That is, foreign substances adhering to the tube wall are removed by the formed ultrasonic sound field. However, the above cylindrical ultrasonic generator allows the use of piezoelectric ceramic by itself, and is manufactured as a single body to have a length corresponding to the length of the housing. In this case, if the size of the tube to be cleaned is very large, the volume of the piezoelectric ceramic may be increased accordingly, which is uneconomical. not. In addition, there is a problem in that the cylindrical ultrasonic generator having a corresponding length according to the length of the housing must be separately manufactured.

In addition, Korean Patent Laid-Open Patent Publication No. 2004-0013269 discloses a “tubular ultrasonic vibration generator”. In the prior art, a plurality of vibrators are fixed in a cylindrical vibrating tube and a semi-circular vibrating block is installed so that ultrasonic vibrations are uniformly transmitted to the entire surface. It was said that the ultrasonic cleaning efficiency could be improved. However, since a number of piezoelectric ceramics and a bolted vibration block are integrated into a semi-circular block, the ultrasonic vibration becomes the main vibration in the axial direction, and the vibration is attenuated in the direction perpendicular to the axis. The vibration tube (sealed tube) again surrounds the oscillator, so the generation of ultrasonic waves is canceled, and the ultrasonic waves are transmitted in the axial direction of the vibrating tube, so there is a problem in that it is difficult to generate ultrasonic waves in the vertical radial direction of the axis.

The present invention has been devised to solve the above-mentioned problems, and the present invention is manufactured as an ultrasonic generator comprising a vibrating body and a piezoelectric vibrator that can operate in a liquid phase, so that ultrasonic waves are transmitted from the side of the vibrating body, An object of the present invention is to provide a piezoelectric ultrasonic wave generator capable of irradiating ultrasonic waves into an arbitrary container, which can be generated at a desired intensity at a location and does not need to be attached to a washing tank.

In addition, according to the present invention, since the ultrasonic generator has a transmission system from the piezoelectric vibrator to the vibrating body, and the piezoelectric vibrator responding to a specific electrical signal is driven, electrical insulation is required when used in a liquid phase. Another object of the present invention is to provide a piezoelectric ultrasonic wave generator implementing a closed structure.

In addition, another object of the present invention is to provide an ultrasonic generator that eliminates the need for a separate washing tank specialized for installation of the ultrasonic generator because the portable ultrasonic generator can be used by submerging it in an arbitrary washing tank. .

The present invention, in order to achieve the above object, a hollow vibrating body; a piezoelectric vibrator installed in at least a portion of the vibrating body along the longitudinal direction of the vibrating body; and an external protrusion extending from the piezoelectric vibrator to at least one of an upper and a lower portion, protruding from the surface of the vibrating body to the outside, and the portion extending from the protruding portion to the inside of the vibrating body is configured to contact the piezoelectric vibrator It provides a piezoelectric ultrasonic wave generator, characterized in that.

The external protrusion may be an external fixing protrusion integrally formed with the vibrating body or an external tightening protrusion separately shaped and coupled to the vibrating body.

When the external protrusion is an external tightening protrusion, it is preferable that the external tightening protrusion includes a bolt part and is coupled to a nut configured in the vibrating body, or the vibrating body has a bolt part and an external tightening protrusion having a nut part is coupled. .

Preferably, the external tightening protrusion or the bolt portion formed on the vibrating body extends through a part of the piezoelectric vibrator.

Preferably, an insulating and waterproofing member is formed in an area other than the area where the piezoelectric vibrator is formed inside the vibrating body.

It is preferable that the second external protrusion is formed in a region other than the region in which the external protrusion is formed among the vibrating body.

It is preferable that the inside of the vibrating body further includes an inner protrusion that protrudes further inward than the inner surface of the vibrating body, and the inner protrusion is configured to be in contact with the piezoelectric vibrator.

It is preferable that a second inner protrusion configured not to come into contact with the piezoelectric vibrator is formed in a region other than the inner protrusion.

According to the present invention as described above, since the ultrasonic generator is manufactured, for example, ultrasonic waves can be generated along the length of both sides of the vibrating body, and it is portable without the need to attach it to the washing tub, regardless of the type of object to be washed. The effect of irradiating and washing the object to be cleaned with ultrasonic waves can be expected. That is, the present invention is intended to be used regardless of the shape, size, and material type of the object to be washed, as well as to make it an independent type separated from the washing tank so that the user can use any washing tank.

In the present invention, for example, since a portable ultrasonic generator in the form of a bar or plate can be used by submerging it in an arbitrary washing tank, the effect of eliminating the need for a separate washing tank can be expected.

In addition, in the present invention, a piezoelectric vibrator is mounted inside a sealed vibrating body to propagate the vibration, and by forming a protrusion outside or inside the vibrating body, the vibration originating from the piezoelectric vibrator is induced to have a larger amplitude, and in particular For example, the effect of maximizing the propagation in a direction perpendicular to the surface of the bar or plate shape and having directionality can be expected.

In addition, the present invention is implemented as a small-volume ultrasonic generator by arranging and combining a plurality of piezoelectric vibrating units in a single vibrating body, nevertheless, an effect of allowing ultrasonic waves to be transmitted to a wider area can be expected.

In addition, since the present invention has a much smaller volume than the conventional ultrasonic cleaner, convenient storage can be expected.

1 is a view showing a conventional ultrasonic generator, a BLT (bolt fastening type Lanjuban ultrasonic generator).

2 is a cross-sectional view showing an ultrasonic wave generator according to an embodiment of the present invention.

3 is an assembly view showing an ultrasonic wave generator according to an embodiment of the present invention.

FIG. 4 is a view showing a state in which the inside of the vibrating body is filled with an insulating and waterproof member in the embodiment of FIG. 1 .

5 is a view in which an external fixing protrusion and an external tightening protrusion protruding to the outside of the vibrating body are formed in the configuration of the ultrasonic generator according to an embodiment of the present invention, and a second external protrusion is configured on both of the upper protrusions.

6 is a structure in which an external fixing protrusion and an external tightening protrusion protruding to the outside of the vibrating body are formed in the configuration of the ultrasonic generator according to an embodiment of the present invention, and the internal fixing protrusion is in contact with the piezoelectric vibrator on one side to the inside It is a drawing.

7 is a structural diagram in which the fixing protrusion is in contact with the piezoelectric vibrator inside and out of the vibrating body, and the external fixing protrusion and the external tightening protrusion are disposed on the left and right in the configuration of the ultrasonic generator according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, terms such as "... unit" and "... group" described in the specification mean a unit for processing at least one function or operation.

1 is a view showing a conventional ultrasonic generator, BLT (bolt fastening type Lanjuban ultrasonic generator), Figure 2 is a cross-sectional view showing an ultrasonic generator according to an embodiment of the present invention, Figure 3 is one of the present invention It is an assembly view showing an ultrasonic generator according to an embodiment, and FIG. 4 is a view showing a state in which the inside of the vibrating body is filled with an insulating and waterproofing member in the embodiment of FIG. 1 , and FIG. 5 is an embodiment of the present invention In the configuration of the ultrasonic generator, an external fixing protrusion and an external tightening protrusion protruding to the outside of the vibrating body are formed, and second external protrusions are configured on both sides of the upper protrusions, and FIG. 6 is an ultrasonic wave according to an embodiment of the present invention. In the configuration of the generator, an external fixed protrusion and an external tightening protrusion protruding to the outside of the vibrating body are formed, and an internal fixed protrusion is in contact with the piezoelectric vibrator 201 on one side to the inside. In the configuration of the ultrasonic generator according to an embodiment, the fixed protrusion is in contact with the piezoelectric vibrator 201 inside and out of the vibrating body, and the external fixed protrusion and the external tightening protrusion are disposed on the left and right.

The present invention has a structure in which the ultrasonic generator 100 is sealed to operate in a solution, a piezoceramic vibrator is arranged therein, and electrode terminals constituting the circuit are embedded therein.

The vibrating body 110 has a sealed structure, and since the vibration transmitted from the piezoelectric vibrator 201 must be radiated in the form of ultrasonic waves with sufficient cleaning power, the vibrating body 110 is manufactured in a structure that enlarges the amplitude of the vibrator. it is necessary to be

The vibrating body 110 may be implemented in various forms, for example, a bar form is preferable, but a wide form such as a plate is also possible. The protrusions 120 to be described later may be formed along the longitudinal direction of the bar-shaped vibrating body 110 , and in the case of a plate shape, may be formed in a form arranged along the X-axis and the Y-axis. If the protrusion 120 is protruding from the vibrating body 110, it is clear that the two-dimensional shape of the vibrating body 110 is not particularly limited to a bar or plate.

The vibrating body 110, which has received the vibration by the piezoelectric vibrator 201, generates ultrasonic waves by the above vibrations, and the ultrasonic generation is the ultrasonic wave according to the density, elastic modulus, Poisson's ratio and shape of the vibrating body material. The intensity, frequency, and radiation direction are determined.

The vibrating body 110 is a closed structure and forms the entire outer periphery of the ultrasonic generator 100, the vibrating body 110 is provided with an external protrusion 120 on at least one side of the outer surface, the vibrating body 110 is As hollow, an inner projection 140 facing inward is provided therein.

In addition, the external protrusion 120 includes, for example, a piezoelectric vibrator 201 positioned inside a bar-shaped vibrating body, an external protrusion 120 vertically aligned with the piezoelectric vibrator 201, and the piezoelectric vibrator 201. It is divided into a second external protrusion 130 located in a non-installed portion, and when this protrusion is formed integrally with the vibrating body 110, it is called an external fixing protrusion 121 and has a separate coupling means (for example, If the bolt) member is fastened to the vibrating body 110 , it is referred to as an external tightening protrusion 123 .

In addition, the inner protrusion 140 includes the piezoelectric vibrator 201 existing inside the vibrating body, the inner protrusion 140 aligned with the piezoelectric vibrator 201, and a second inner portion located in a portion where the piezoelectric vibrator 201 is not installed. It is divided by a protrusion 143 .

The shape of the inner and outer protrusions 120 is preferably any one of a curved surface, a donut, and a polygon in a vertical section in a direction protruding from the vibrating body 110 . However, this shape is not particularly limited.

The material of the vibrating body 110 may be made of a metal such as aluminum, iron, stainless, titanium, brass, bronze, tungsten, or a plastic material such as ABS, PET, PP, urethane, and Teflon.

As an example, the first ultrasonic generator of FIG. 2 includes external fixing protrusions 121 and external tightening protrusions 123 on both sides of the vibrating body 110, and a donut-shaped piezoelectric vibrator 201 (for example) For example, it is a ceramic vibrator, and the material is not particularly limited) and the electrode part 203 to which power for driving the piezoelectric vibrator 201 is applied is in direct contact with both sides, and the central part of the piezoelectric vibrator 201 is in contact. have.

The bolt part 151 formed on the external tightening protrusion 123 passes through, for example, the central part of the piezoelectric vibrator 201 and is fastened to the nut part 153 formed on the external fixing protrusion 121 on the opposite surface, whereby the ultrasonic waves are transmitted to both sides. It may radiate perpendicularly from the surface of the outer protrusion 120 . That is, depending on which part of the vibrating body 110 is formed the external protrusion 120, the divergence position and direction of the ultrasonic wave can be determined and adjusted.

At least two first ultrasonic generators may be arranged to constitute the ultrasonic generator 100 .

The second ultrasonic generator of FIG. 2 has a structure in which external fixing protrusions 121 are formed on both sides (upper and lower) of the vibrating body 110, and the vibrating body is generated from the surrounding ultrasonic generator including the piezoelectric vibrator 201 as a component. Ultrasonic waves transmitted along 110 are concentrated on the external fixing protrusions 121 so that the ultrasonic waves can be vertically radiated from the surfaces of both external fixing protrusions 121 .

The third ultrasonic generator of FIG. 2 (shown in FIG. 4 extracted) is an external fixing protrusion 121 formed on both sides of the vibrating body 110, an external tightening protrusion 123, and an internal protrusion 140 formed therein. is in direct contact with the assembly of the donut-shaped piezoelectric vibrator 201 inside, and the bolt part 151 of the external tightening protrusion 123 penetrates a certain part (eg, the central part) of the piezoelectric vibrator. It is fastened to the nut portion 153 formed on the opposite surface inner fixing protrusion 141 and the outer fixing protrusion 121 , so that ultrasonic waves can be vertically radiated from the surfaces of both external protrusions 120 .

At least two structures of the third ultrasonic generator shown in FIG. 4 are arranged, and the ultrasonic generator may be configured in this form.

The second external and internal protrusions of FIG. 4 attenuate the ultrasonic waves transmitted from the arranged peripheral ultrasonic generators to suppress ultrasonic interference generated between the arrayed ultrasonic generators, and serve to adjust the ultrasonic intensity and radiation direction of the peripheral ultrasonic generators. do.

The fourth ultrasonic wave generator of FIG. 2 (extracted in FIG. 5 ) has an external fixing protrusion 121 formed on both sides of the vibrating body 110 , an external tightening projection 123 , and an internal fixing projection 141 formed on one side of the vibrating body 110 . ) and is in direct contact with the donut-shaped piezoelectric vibrator 201 on both sides, and the bolt part 155 from the external fixing protrusion 121 penetrates a certain part (for example, the central part) of the piezoelectric vibrator 201 As a structure fastened to the nut portion 157 formed on the opposite inner fixing protrusion 141 and the outer tightening protrusion 123 , ultrasonic waves may be vertically radiated from the surfaces of both outer protrusions.

In FIG. 2 , the fourth ultrasonic generator is extracted and illustrated in FIG. 5 , and at least two of the fourth ultrasonic generators may be arranged in the structure of FIG. 5 to constitute the ultrasonic generator 100 .

The ultrasonic generator of FIG. 6 is composed of an external fixed protrusion 121 and an internal fixed protrusion 141 formed on both sides of the vibrating body 110, and is in direct contact with the combination of the piezoelectric vibrator 201 in the form of a disk inside from both sides. Ultrasound as a structure that transmits vibration and is fastened to the

bolt parts

151 and 155 and the

nut parts

153 and 157 of the external fixing protrusion 121 and the external tightening protrusion 123 protruding from the periphery of the internal and external fixing protrusion 121 may be vertically radiated from the surfaces of both external protrusions 120 .

7 is a structure filled with an insulating and waterproofing member 160 inside the vibrating body in the structure of FIG. 2, and the ultrasonic generator 100 of the present invention is provided to operate in a solution, and the filler is rubber; It is made of a polymer material such as silicone. Due to the presence of the insulating and waterproofing member 160, the directionality of the ultrasonic wave can be more precisely implemented.

Although the present invention has been described in more detail with reference to examples above, the present invention is not necessarily limited to these examples and various modifications may be made within the scope without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not stabilized by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims

hollow vibrating body;

a piezoelectric vibrator which generates vibration in at least a portion of the inside of the vibrating body and transmits the vibration to the vibrating body; and

an external protrusion extending from the piezoelectric vibrator to at least one of an upper portion or a lower portion, protruding from the surface of the vibrating body to the outside, and the portion extending from the protruding portion to the inside of the vibrating body is configured to contact the piezoelectric vibrator;

includes,

The external protrusion is an external fixing protrusion integrally formed with the vibrating body and an external tightening protrusion formed separately and coupled to the vibrating body,

The vibrating body is sealed to operate in a solution, and a piezoelectric ceramic vibrator is arranged therein, and electrode terminals constituting the circuit are embedded therein.
According to claim 1,

When the external protrusion is an external tightening protrusion,

The external tightening protrusion has a bolt part and is coupled to a nut part configured in the vibrating body, or the vibrating body has a bolt part and an external tightening protrusion having a nut part is coupled.
3. The method of claim 2,

A piezoelectric ultrasonic wave generator, characterized in that the external tightening protrusion or the bolt portion formed on the vibrating body extends through a part of the piezoelectric vibrator.
According to claim 1,

An insulating and waterproofing member is formed in an area other than the area where the piezoelectric vibrator is formed inside the vibrating body.
According to claim 1,

A piezoelectric ultrasonic wave generator, characterized in that the second external protrusion is formed in a region other than the region in which the external protrusion is formed among the vibrating body.
According to claim 1,

A piezoelectric ultrasonic wave generating device, characterized in that the inner protrusion further includes an inner protrusion that protrudes further inward than the inner surface of the vibrating body, and the inner protrusion is configured to be in contact with the piezoelectric vibrator.
7. The method of claim 6,

A piezoelectric ultrasonic wave generator according to claim 1, wherein a second inner protrusion configured not to come into contact with the piezoelectric vibrator is formed in a region other than the inner protrusion.