KR101631613B1 - bubble generating apparatus - Google Patents

Abstract

The present invention relates to an internal pipe in which a plurality of through holes are formed on a circumferential surface and a plurality of balls, a roller, a ball plunger, a valve piece, an elastic piece, a sliding piece, , An outer tube having a circumferential surface formed with a plurality of through holes is circumscribed, the inner tube is a rotating body, the other is a fixed body, and the inner tube is connected to a gas supply means for supplying a fluid to be a bubble, A fan which is fixedly circumscribed at one side or the other side of the rotation axis of the motor to generate an outside air flow, and a fan which guides the outside air flow to the upstream end of the inner tube To a bubble generator having a guide portion.

Description

A bubble generating apparatus

The present invention relates to a bubble generator, and more particularly, to a bubble generator in which an inner tube of a bubble generator is driven and an air supply source for supplying air to the inner tube is realized by a single drive source.

Bubbles are the pockets of gas in the liquid, that is, bubbles.

Small bubbles having a bubble diameter of about 100 占 퐉 are called micro bubbles and have a larger volume surface area than a normal diameter bubble and have a long residence time in the liquid so that the volume transport, chemical reaction, physical and chemical properties Various applications are expected.

Generally, in a bubble generator for generating micro bubbles by cutting a gas, a method of blowing gas into liquid through a porous body is used.

Particularly, there is a bubble generator which generates fine bubbles by supplying a gas through a porous body to a tube through which water flows from a gas supply device such as a compressor.

In the recently developed bubble generator, a method of dividing the bubble by applying a shearing force to the bubble surface is often used.

The bubble generator includes a container body having a conical space, a pressurized liquid introduction port opened in a tangential direction on a part of the inner wall circumferential surface of the space, a gas introduction hole opened in the bottom of the conical space, There is a swirl bubble generator composed of a swirling gas-liquid outlet hole opened at the top of the space.

However, in the bubble generator using the porous body, since the bubble is not easily separated from the porous body, the generated bubble becomes larger than the pore diameter of the porous body, and a small bubble can not be generated.

In addition, as a method of rotating the porous body, large bubbles are generated from the vicinity of the center of the rotation axis in which the influence of rotation is small, so that the diameter of the bubbles generated under optimum conditions is limited to about 0.4 mm.

In this regard, in the swirl type bubble generator, since a shearing force is applied to the bubble surface, small bubbles can be generated. However, in order to forcibly apply the swirling flow to the liquid, since the gas is pressurized and supplied to the conical container body, the pressure loss is increased, and the ratio of the bubble in the liquid is lowered as compared with the case of using the porous body It remained a problem.

In order to solve this problem, a discharge port of a gas supply pipe, which is driven to rotate by a pulley, is disposed in the axial axis of a motor disposed outside the water tank, and a gas inlet is connected to the discharge port, Korean Patent No. 10-1157719 proposes a method for generating minute bubbles by the shear force generated by the relative movement between water in the bubble generator and the rotating bubble. However, in the bubble generator of the above scheme, Is cut only by the shear force, the size of the generated bubble is not constant, and the size of the bubble can not be freely adjusted.

A bubble generator for solving such a problem is disclosed in Patent Registration No. 10-1231689 filed by the present inventor.

The bubble generator described above forcibly cuts the bubbles discharged through the through holes of the inner tube by rotating the inner tube in a state in which an outer tube having a plurality of through holes formed on the circumferential surface is formed in an inner tube having a plurality of through holes formed on the circumferential surface, It is possible to regulate the size of the bubble generated according to the rotation speed of the inner tube, but the inner tube or outer tube is deformed due to frictional heat between the inner tube and the outer tube because the outer tube is closely circumscribed to the inner tube There arises a problem that the inner tube can not be rotated.

A bubble generator for solving such a problem is disclosed in Korean Patent Application No. 10-2014-0018827 filed on Feb. 19, 2014 by the present inventor.

The above-described bubble generator includes an inner tube 2 and an outer tube 3 circumscribing the inner tube 2 or a retainer 30 (not shown) circumscribed to the inner tube 2, as shown in Figs. 1 to 40 shown in Korean Patent Application No. 10-2014-0018827 , Wherein the inner tube (2) and the outer tube (3) or the one or more retainers (30) are a rotating body or reciprocating body moving in opposite directions to each other, or a bubble generator Wherein at least one of the outer tube (3) or the one or more retainers (30) is a uni-directional rotating body or reciprocating body and the other is a fixed body and at least one of the inner tube (2) One or a group of one or a plurality of through holes in the circumferential direction is formed on the circumferential surface of the inner tube (2) and the inner tube (2) of the inner tube (2) and the one or more retainers (30) Be And a downstream end of the inner pipe (2) and a downstream end of the inner pipe (2) out of the inner pipe (2) and the one or more retarders (30) And the outer peripheral surface of the inner tube or the outer peripheral surface of the outer tube or the inner tube is provided between the outer tube or the retainer (30) and the inner tube (2) There is provided a bubble generator in which elastic means is elastically brought into contact with the inner circumferential surface of the outer tube to pass through or open and close the through holes of the one group or the plurality of groups formed in the inner tube or the outer tube, ); And an outer disk plate (3 ') spaced apart from the front end surface (2a) of the inner tube, wherein either the inner tube (2) or the outer disk plate (3') is a one- And a plurality of through holes are formed in at least one of the front end surface 2a of the inner tube 2 and the outer disk plate 3 ', and the inner tube 2 ) And the outer disk plate (3 ') are communicably connected to a gas supply source (5), and between the distal end surface (2a) of the inner tube and the outer disk plate (3' The present invention has been made to solve the above problems by providing a bubble generator which is elastically contacted to the inner tube or the outer disk plate to pass through or to open or close the plurality of through holes formed in the inner tube or the outer tube .

However, in the bubble generator described above, the gas supply source for supplying gas to the inner pipe and the driving source for rotating the inner pipe are performed by separate power means, which increases the number of parts and increases the manufacturing cost and maintenance cost.

In addition, since the rotating body needs to be rotated at a high speed in order to make the bubble generated in the bubble generator described above to be finer, a motor for driving the rotating body is also a high-speed motor so that a considerable heat is generated in the motor, Since the fan must be provided in the gas supply source for supplying the gas into the rotating body, the number of parts is increased and the manufacturing cost and the maintenance cost are also increased.

The present invention has a problem in solving the above-mentioned problems.

 The present invention relates to a bubble generator comprising an inner tube (2) as a rotating body and an outer tube (3) or a retainer (30) circumscribed to the inner tube (2), wherein the outer tube (3) or one or more retainers And one or a plurality of through holes in the circumferential direction are formed on the circumferential surface of the inner pipe 2 and the outer pipe 3 in the axial direction, And the upstream end is connected to the gas supply source in a state in which the downstream end of the inner tube is closed and the outer tube (3) or the one or more retainers (30) Means for passing or crossing through the through holes of the one group or the plurality of groups formed in the inner tube elastically contacting the outer circumferential surface of the inner tube is interposed and the gas supply source is provided at the upstream end of the inner tube A fan which is fixedly circumscribed at one side or the other side of the rotary shaft of the motor to generate an atmospheric air flow from the other side of the rotary shaft to one side of the rotary shaft, An inner tube (2) provided with a bubble generator having a guiding guide part or having a distal end surface (2a); And an outer disk plate (3 ') spaced apart from the front end surface (2a) of the inner tube, wherein the inner tube (2) is a unidirectional rotating body and the outer disk plate (3' And a plurality of through holes are formed in the distal end surface 2a of the inner tube 2. The inner tube 2 is connected to the gas supply source 5 so as to be able to flow, Is interposed between the outer disk plate (3 ') and the outer disk plate (3') so as to elastically contact the inner tube at the time of rotation of the inner tube so as to pass across or open / close the plurality of through holes formed in the inner tube, A fan which is fixedly circumscribed at one side or the other side of the rotation shaft of the motor to generate an air flow, and a guide for guiding the air flow to the upstream end of the inner tube, Having a portion By providing the bubble generator it could solve the above problems.

According to the problem solving means of the present invention, it is possible to finely cut the bubbles of the gas exiting into the liquid through the through-hole of the inner tube by the opening and closing means with a simple structure, The gas supply source for supplying the gas to the inner pipe and the driving source for rotating the inner pipe are performed by one power means so that the number of parts Not only the manufacturing cost and the maintenance cost are reduced, but also the cooling of the motor can be realized, which makes it possible to further reduce the manufacturing cost and the maintenance cost.

In addition, in the bubble generator of the above-mentioned problem solution, since the path for introducing the air into the inner tube of the gas supply means is shortened, the energy for supplying air is reduced compared to the conventional system in which air is supplied to the inner tube, .

1 and 2 are conceptual diagrams showing the bubble generator of the first embodiment,
Figs. 3 and 4 are conceptual diagrams showing the bubble generator of the second embodiment,
5 and 6 are conceptual diagrams showing a bubble generator of a modified embodiment of the second embodiment,
7 and 8 are conceptual diagrams showing the bubble generator of the third embodiment,
Fig. 9 is a conceptual diagram showing embodiments capable of rotating the planetary gear of Fig. 7,
10 is a conceptual diagram showing the bubble generator of the fourth embodiment,
11 is a view showing the ball plunger of FIG. 10,
12 is a conceptual diagram showing the bubble generator of the fifth embodiment,
13 is a conceptual diagram showing the bubble generator of the sixth embodiment,
14 is a conceptual diagram showing the bubble generator of the seventh embodiment,
15 is a conceptual diagram showing the bubble generator of the eighth embodiment,
16 and 17 are views showing the bubble generator of the ninth embodiment,
18 is a conceptual diagram showing the bubble generator of the eleventh embodiment,
19 is a conceptual diagram showing a bubble generator of the twelfth embodiment, and Fig.
20 is a conceptual diagram showing a bubble generator of the thirteenth embodiment;

Hereinafter, the bubble generator of the first embodiment according to the present invention will be described in detail with reference to Fig.

Fig. 1 shows the bubble generator of the first embodiment.

A proximal end portion of the inner tube 2 as a rotating body is coupled to the other side of the rotary shaft 85 of the motor 80. A plurality of fine holes are formed in the distal end portion of the inner tube 2, And the gas is generated in the gas supply means 5 provided in the motor 80 and is discharged out of the inner pipe 2 from the fine holes.

That is, the inner tube 2 has a tubular portion with its tip closed, and a cavity 11 is formed therein. A plurality of through holes 12 are formed on the circumferential surface of the distal end portion of the inner tube 2 in an axial direction and in a circumferential direction.

The base end of the inner tube 2 is fixedly inserted into the tubular rotor 83 of the motor 80 fixed to the bracket provided on the base and is rotatably mounted to the case 81 of the motor 80 through a bearing And is coupled to the other side of the rotating shaft 85 which is provided.

The motor (80) is provided with a gas supply means (5).

The gas supply means 5 includes a plurality of through holes 89 formed in one side wall of the case 81 and communicating with the atmosphere, a plurality of through holes 90 formed in the other side wall of the case 81, And a space between the through-hole 89, the tubular rotor 83 and the stator 82, and the through-hole 90 sequentially through the inner tube 2 A fan 86 that is fixedly circumscribed at one side or the other side of a rotary shaft 85 coupled to the inner pipe 20 and a plurality of openings 90 formed at the base end side of the inner pipe 20, And a guide portion 87 whose one end is fixed to the case 81 and the other end is circumscribed via a bearing at the base end of the inner tube 2 in order to allow the flow to the through hole 88. [

A plurality of retainers 30 fixed to the outer tube 2 are circumscribed by a plurality of balls 7a or a plurality of rollers 7b at the distal end of the inner tube 2 so that the distal end of the inner tube 2 contacts the plurality of retainers 30. [ And the plurality of retainers 30 are fixed to the base.

The plurality of retainers (30) have a ring shape to cover a plurality of through holes (12) arranged in the circumferential direction of the inner tube (2), and a plurality of through holes And is disposed for each through hole in the axial direction so as to cover the hole 12. [

When a plurality of balls 7a are interposed between the plurality of retainers 30 and the distal end of the inner tube 2 as shown in Fig. 1, the inner peripheral surface of the plurality of retainers 30 and the inner tube A plurality of ring-shaped concave portions 6 spaced a predetermined distance in the axial direction of the inner tube 2 are formed on at least one of outer circumferential surfaces of the inner tube 2 And the plurality of balls 7a are in contact with the plurality of recesses 6 in the circumferential direction or spaced apart from each other by a predetermined distance, And the plurality of balls 7a pass across the plurality of through holes 12 when the inner tube 2 rotates. 1 shows that the plurality of recesses 6 are formed only in the inner tube 2. [

When a plurality of rollers 7b are interposed between a plurality of retainers 30 and the distal end portion of the inner tube 2, the inner tube 2 is provided on the outer peripheral surface of the distal end portion of the inner tube 2, The recessed portion 6 is formed with a plurality of through holes 12 in the circumferential direction of the inner tube 2 and in the axial direction at regular intervals, And a plurality of rollers 7b are seated on the recessed portion 6 in a circumferential direction spaced apart from each other by a predetermined distance, Through the plurality of through holes (12).

The bubble generator of the first embodiment configured as described above can be operated as follows.

The inner tube 2 is rotated while the motor 80 is operated so that the outer tube is supplied from the gas supply means 5 to the inner tube 2, A plurality of balls 7a or a plurality of rollers 7b interposed in the inner tube 2 are rotated in the circumferential direction of the inner tube 2 and each of the rotating balls 7a or the plurality of rollers 7b rotates in the inner tube 2. [ Passes through the plurality of through holes 12 arranged in a straight line in the circumferential direction of the inner tube 2 so that a bubble ejected from the plurality of through holes 12 of the inner tube 2 passes through the plurality of balls 7a Or by a plurality of rollers 7b, so that they have bubble particles of small diameter.

In addition, the bubble generator of the first embodiment configured as described above performs the supply of gas to the inner tube and the rotation of the inner tube by the gas supply means, thereby increasing the number of parts and reducing the manufacturing cost and maintenance cost, When the outside air is supplied from the gas supply means 5 to the inner tube 2, the space between the tubular rotors 83 and the stator 82 is moved from one side to the other side so that the tubular rotors 83 and It is possible to cool the heat generated between the stator 82 so as to perform the cooling of the motor, further making it possible to further reduce manufacturing costs and maintenance costs.

Further, in the bubble generator of the first embodiment, the path through which air is introduced into the inner tube 2 by the gas supply means 5 is shortened, so that compared to the conventional method of supplying air to the inner tube, The energy for supplying can be saved.

Hereinafter, the bubble generator of the second embodiment according to the present invention will be described in detail with reference to FIG. 3 and FIG.

3 shows the bubble generator of the second embodiment.

The bubble generator of the second embodiment has the outer tube 3 circumscribed to the inner tube 2 and fixed to the case 81 instead of the bator generator 7a of the bubble generator of the first embodiment, And the plurality of through holes 13 are also formed in the periphery of the tip end portion in the axial direction and in the circumferential direction, as in the bubble generator of the first embodiment.

A plurality of balls 7a are interposed between the distal end of the outer tube 3 and the distal end of the inner tube 2 as shown in Fig. 3, the inner peripheral surface of the distal end of the outer tube 3 and the inner tube 2 , A plurality of ring-shaped concave portions (6) spaced at a predetermined distance in the axial direction of the inner tube (2) are formed so as to allow the plurality of balls (7a) to be seated, A plurality of the plurality of through holes 12 are formed in each of the plurality of recesses 6 of the inner tube 2 at regular intervals in the circumferential direction of the inner tube 2, ) Or the plurality of recesses (6) of the outer tube (3) in a circumferential direction or spaced apart from each other by a predetermined distance, and the plurality of balls (7a) ). ≪ / RTI > 3 shows that the plurality of recessed portions 6 are formed only in the inner pipe 2. [

4, a plurality of rollers 7b are interposed between the distal end portion of the outer tube 3 and the distal end portion of the inner tube 2. In this case, (2) is formed on at least one of the inner peripheral surface of the inner tube (2) and the outer peripheral surface of the distal end of the inner tube (2), and the tubular recessed portion (6) (12) and / or the plurality of through holes (13) are formed at regular intervals in the direction of the circumference of the tubular recess (6), and the plurality of rollers (7b) And the plurality of rollers 7b are passed across the plurality of through holes 12 and the plurality of through holes 13. In this case, 4 shows that the concave portion 6 is formed only in the inner pipe 2. [

The bubble generator of the second embodiment configured as described above can be operated as follows.

The air is supplied from the gas supply means 5 to the inner tube 2 while the motor 80 is operated to rotate the inner tube 2 and between the distal end of the outer tube 3 and the distal end of the inner tube 2 A plurality of balls 7a or a plurality of rollers 7b interposed in the inner tube 2 rotate in the circumferential direction of the inner tube 2. Each of the plurality of rotating balls 7a selectively has a radius The bubbles ejected from the plurality of through holes 12 of the inner pipe 2 are cut off by the plurality of balls 7a, Or each of the plurality of rotating rollers 7b passes across the plurality of through holes 12 which are radially opposed to each other selectively at the time of rotation of the inner tube so that the plurality of through holes 12 of the inner tube 2 (Bubble) ejected from the nozzle The bobbles of small diameter are discharged to the outside through the plurality of through holes 13 in a state that the small diameter bubble has a constant diameter.

Further, the bubble generator of the second embodiment configured as described above performs the supply of the gas to the inner pipe and the rotation of the inner pipe by the gas supply means, thereby increasing the number of parts and reducing the manufacturing cost and the maintenance cost, When the outside air is supplied from the gas supply means 5 to the inner tube 2, the space between the tubular rotors 83 and the stator 82 is moved from one side to the other side so that the tubular rotors 83 and It is possible to cool the heat generated between the stator 82 so as to perform the cooling of the motor, further making it possible to further reduce manufacturing costs and maintenance costs.

In addition, in the bubble generator of the second embodiment, the path through which air is introduced into the inner tube 2 by the gas supply means 5 is shortened, so that compared with the conventional method of supplying air to the inner tube, The energy for supplying can be saved.

In the second embodiment, a ring-shaped partition wall portion 71 in rolling contact with the plurality of balls 7a is provided on the inner peripheral surface of the outer tube 3 facing the plurality of balls 7a, 5, a plurality of balls 7a may be formed on the inner circumferential surface of the plurality of partition walls 71, and a plurality of balls 7a may be formed on the inner circumferential surface of the plurality of balls 7a, Like spring 75 is interposed on the inner circumferential surface of the partition wall portion 71 to resiliently urge the partition wall portion 71 radially inward.

6, even when a plurality of cylindrical rollers 7b are interposed between the outer tube 3 and the inner tube 2, the inner circumferential surface of the outer tube 3 is provided with the plurality of rollers 7b A plurality of partition walls 71 in the shape of a ring which come into rolling contact with the plurality of balls 7a or the rollers 7b in the radial direction can be formed spaced apart in the axial direction, A ring-shaped spring 75 is interposed on the inner circumferential surface of the plurality of partition wall portions 71.

The ring-shaped spring 75 is a spring having a property of contracting radially inward, and in order to resiliently press the plurality of balls 7a or the roller 7b radially inward, the plurality of partition walls Shaped spring 75 is elastically retracted and inserted into a groove radially inwardly opened on the inner circumferential surface of the spring 71 so that the opening is smaller than half the diameter of the end surface of the spring 75.

The ring-shaped spring 75 elastically presses the plurality of balls 7a or the roller 7b to assist in blocking the plurality of through holes 12. [

Particularly, it is preferable from the viewpoint that the plurality of balls 7a or the rollers 7b have elasticity, so that the plurality of through-holes 12 can be hermetically sealed.

The recesses are formed in at least one of the inner circumferential surface of the outer tube and the outer circumferential surface of the inner tube in the second embodiment. However, the present invention is not limited to this, and the plurality of balls or the plurality The cylindrical rollers may be interposed between the inner circumferential surface of the outer tube and the outer circumferential surface of the inner tube closely or spaced.

Hereinafter, the bubble generator of the third embodiment according to the present invention will be described in detail with reference to FIGS. 7 and 8. FIG.

The bubble generator of the third embodiment is basically the same as the bubble generator of the first embodiment except that the bubble generator of the third embodiment has basically the same structure as that of the second embodiment except that the bubble generator of the third embodiment has a structure for rotating the inner tube, A plurality of through holes 12 are formed in a plurality of valleys of the external gear 21 in the axial direction of the external gears 21 as shown in FIG. 2); An outer tube (3) circumscribed by the inner tube (21) at a predetermined distance in the radially outward direction and provided with an internal gear (31) on the inner peripheral surface; And a plurality of planetary gears (40) interposed between the external gear (21) and the internal gear (31) and meshing with each other.

A plurality of through holes 13 spaced at a predetermined interval in the axial direction of the internal gear 31 are formed in a plurality of valleys of the internal gear 31 of the outer tube 3. [ The outer tube (3) and the downstream end of the inner tube (2) are clogged.

The plurality of planetary gears 40 are connected to the gas supply means 5 as shown in Fig. 7 so that the crests of the plurality of planetary gears 40 are selectively opposed to the plurality of through holes 12 A plurality of planetary gears 40 arranged in a line in the axial direction of the inner pipe 2 are selectively connected to the inner pipe 2 in a state of being spaced apart in the axial direction and in the circumferential direction of the inner pipe 2 connected thereto, Or the outer planetary gear 40 is circumscribed not rotatably or fixedly and axially movably on the shaft 41 between the outer ring 3 and the outer ring 3, The plurality of through holes (12) of the inner pipe (2) connected to the supply means (5) are spaced apart in the circumferential direction of the inner pipe (2) so as to selectively face the mountain portions of the plurality of planetary gears , The internal gear (31) and the internal gear The length on the axial line of the gear 21 is extended over the entire length and optionally circumscribed between the inner tube 2 and the outer tube 3 in a rotatable or fixed and axially non- .

9, when the inner tube 2 is rotated by the motor 80 in a state where the outer tube 3 is fixed, the plurality of planetary gears 40 ) Can rotate and rotate.

The bubble generator of the third embodiment configured as described above can be operated as follows.

The plurality of planetary gears 40 rotate and revolve when the inner tube 2 is rotated and open and close the plurality of through holes 12 of the inner tube 2 by the planetary gear 40, The outside air is discharged into the outer tube 3 through the plurality of through holes 12 of the inner tube 2 in a state in which the outside air is supplied to the inner tube 2 while the inner tube 2 is connected to the gas supply means 5 The bubbles are blocked by the plurality of planetary gears 40 to generate fine bubbles and then mixed into the liquid existing between the outer tube 3 and the inner tube 2 to form a plurality of through holes 13). ≪ / RTI >

In addition, the bubble generator of the third embodiment performs gas supply to the inner pipe and rotation of the inner pipe by the gas supply means, thereby increasing the number of parts and reducing the manufacturing cost and the maintenance cost, The tubular rotor 83 and the stator 82 are moved from one side to the other side of the space between the tubular rotor 83 and the stator 82 when ambient air is supplied to the inner tube 2 from the tubular rotor 83 and the stator 82, ) Of the motor, so that it is possible to perform cooling of the motor, further making it possible to further reduce manufacturing costs and maintenance costs.

Further, in the bubble generator of the third embodiment, the path through which air is introduced into the inner tube 2 by the gas supply means 5 is shortened, so that compared with the conventional system in which air is supplied to the inner tube, The energy for supplying can be saved.

Hereinafter, the bubble generator of the fourth embodiment according to the present invention will be described in detail with reference to FIG.

The bubble generator of the fourth embodiment shown in Fig. 10 is different from the bubble generator of the first embodiment only in that a plurality of ball plungers 7 are provided instead of a plurality of balls 7a interposed between the inner tube 2 and the retainer 30 And the remaining configuration is the same as that of the first embodiment.

The base ends of the plurality of ball plungers (7) are fixed to the inner peripheral surface of the plurality of retainers (30).

When a plurality of ball plungers 7 are interposed between the plurality of retainers 30 and the distal end portion of the inner tube 2 as shown in Fig. 10, the plurality of through holes 12 are formed in the inner tube 2 can be elastically opened and closed by the plurality of ball plungers 7 in rotation.

11, the ball plunger 7 includes a body a having a base end fixed to the retainer 30 and a tip end extending radially inward of the inner tube 2, A spring c built in the bore b and a ball 7a inserted into and retracted from the opening of the bore b to the inner tube 2 at the tip of the bore b .

The ball plunger 7 is interposed between the spring c and the ball 7a to positively pressurize the ball 7a by the spring c, And a pressure plate (d) in sliding contact with the inner wall of the housing.

In the ball plunger 7, between the ball 7a and the pressure plate d, the ball 7a can freely rotate in all directions including the circumferential direction of the inner tube at the opening of the bore b. A plurality of balls f having a diameter smaller than the diameter of the balls 7a may be interposed.

The diameter of the opening is smaller than the diameter of the ball 7a and a half or more of the ball 7a is inserted into the bore b so that the ball 7a slips out of the bore b (B) elastically pressurizes the outer peripheral surface of the inner tube (2) while protruding and retracting from the opening of the bore (b) to stably open and close the plurality of through holes (12) .

The plurality of balls 7a of the plurality of ball plungers 7 are arranged in a straight line in the circumferential direction of the inner tube 2. The plurality of balls 7a of the plurality of ball plungers 7 can be operated in the same manner as in the first embodiment, The bubbles ejected from the plurality of through holes 12 of the inner tube 2 are reliably opened and closed by the elastic force of the spring c so that the plurality of balls 7a In view of the fact that it is cut with certainty.

Hereinafter, the bubble generator of the fifth embodiment according to the present invention will be described in detail with reference to FIG.

The bubble generator of the fifth embodiment shown in Fig. 12 is different from the bubble generator of Fig. 12 only in that a plurality of ball plungers 7 of the fourth embodiment are provided instead of a plurality of balls 7a interposed between the inner tube 2 and the outer tube 3. [ 2, and the remaining configuration is the same as that of the second embodiment.

The base ends of the plurality of ball plungers (7) are fixed to the inner peripheral surface of the tip end portion of the outer tube (3).

The bubble generator of the fifth embodiment employing a plurality of ball plungers 7 as described above can operate in the same manner as the operation of the second embodiment. In particular, the plurality of balls 7a of the plurality of ball plungers 7, The plurality of through holes 12 arranged in a straight line in the circumferential direction of the inner tube 2 are reliably opened and closed by the elastic force of the spring c, From the viewpoint that bubbles ejected from the plurality of balls 7a are reliably cut by the plurality of balls 7a.

In the second embodiment, when a plurality of elongated rollers 7b are interposed between the inner pipe 2 and the outer pipe 3 in the longitudinal direction of the inner pipe 2, A plurality of elastic resilient pieces 77 for opening and closing the plurality of through holes 12 of the inner pipe 2 may be pivotally fixed to the outer peripheral surface of the inner pipe 2, A plurality of outer elastic pieces 78 for opening and closing the plurality of through holes 13 of the outer tube 3 can be pivotally fixed to the inner peripheral surface of the outer tube 3. [

The structure for mounting the plurality of elastic resilient pieces 77 to the inner tube 2 is characterized in that a plurality of slot grooves 2a extending in the longitudinal direction are formed on the outer peripheral surface of the inner tube 2 in a circumferential direction And a plurality of ribs (77a) that can be fitted in the plurality of slot grooves (2a) in a heat sealing manner are formed on a radially inner surface of the plurality of ribbons When one end of the elastic resilient piece 77 is fixed and the tips of the plurality of elastic resilient pieces 77 are extended in one circumferential direction of the inner tube 2 and are pressed by the plurality of rollers 7b, If any one of the plurality of through holes 12 is blocked and is not pressed by the plurality of rollers 7b, the plurality of through holes 12 can be elastically restored so as to be radially inwardly spaced apart from each other Do.

The structure for mounting the plurality of outer elastic pieces 78 to the outer tube 3 is characterized in that a plurality of slot grooves 3a extending in the longitudinal direction are formed on the inner peripheral surface of the outer tube 3, And a plurality of bands (78a) that can be fitted to the plurality of slot grooves (3a) in a heat sealing manner are formed on a radially inner surface of the plurality of bands (78a) One end of each of the outer elastic pieces 78 is fixed and the tip ends of the plurality of outer elastic pieces 78 are extended in one circumferential direction of the outer tube 3 to be elastically deformed when pressed by the plurality of rollers 7b And is resiliently restored so as to be radially inwardly spaced apart from the plurality of through holes (13) unless the plurality of through holes (13) is blocked by the plurality of rollers (7b) It is possible.

When the bubble generator of the present invention is applied to a liquid reservoir having a large amount of foreign matter, the inner and outer elastic pieces 77 and 78 are arranged such that the plurality of rollers 7b are arranged in the plurality of through holes 12 and 13, it is possible to surely close the plurality of through holes 12 and 13 by the plurality of rollers 7b, thereby preventing the intrusion of foreign matter. .

In the second embodiment, the plurality of through holes (12, 13) are provided with the inner / outer elastic pieces (12, 13) in a state in which the plurality of rollers (7b) are interposed between the inner pipe (2) As shown in Fig. 13, both ends of a shaft 7c inscribed in the plurality of rollers 7b are connected to both ends of the ring 2 arranged on both sides of the inner tube 2, Shaped springs 75 and 75 so that the plurality of rollers 7b can be elastically pressed against the inner circumferential surface of the spring 75 or 75 of the shape.

As the inner tube 2 rotates, the plurality of rollers 7b rotate or revolve with the rotation of the inner bobbin generator so that the inner and outer elastic pieces 77 and 78 are continuously pressurized and released, The through holes 12 and the plurality of through holes 13 are successively closed and repeatedly opened and closed to reliably cut the bubbles or droplets ejected through the through holes 12, It can emit out.

In the sixth embodiment, instead of the plurality of rollers, a plurality of balls may be circumscribed on the plurality of shafts 7c.

In the sixth embodiment, a plurality of ring-shaped springs 75 and 75 are described as elastically pressing both ends of the plurality of shafts 7c. However, the present invention is not limited to this, The spring may press each of the plurality of shafts 7c in the radial direction.

In the second to sixth embodiments, a plurality of ball plungers 7, a plurality of balls 7a, a plurality of rollers 7b, or a plurality of balls 7b interposed between the inner pipe 2 and the outer pipe 3, In the seventh embodiment, as shown in Fig. 14, when the roller 7b and the inner / outer elastic pieces 77, 78 are omitted, the inner tube serving as the rotating body is communicable with the gas supply means 5 A plurality of inner valve pieces 177 for opening and closing the plurality of through holes 12 of the inner pipe 2 are formed on the outer peripheral surface of the inner pipe 2 in a state in which the through holes are formed on the circumferential surfaces of the inner pipe and the outer pipe, As shown in Fig.

The structure for elastically slidingly contacting the plurality of inner valve pieces 177 with the outer circumferential surface of the inner pipe 2 is disposed between the inner pipe 2 and the outer pipe 3, The base end of one inner valve piece 177 extending in the longitudinal direction of the inner tube is fixed to each of the plurality of shafts 177a extending in the longitudinal direction of the outer tube 3 and fixed to the outer tube 3 and spaced apart from each other by a predetermined distance in the circumferential direction of the inner tube And the springs 175 and 175 fixed to both sides of the plurality of shafts 177a or the outer tube 3 push the plurality of inner valve pieces 177 toward the outer peripheral surface of the inner tube 2 The radially inner surface of the tip end of the plurality of inner valve pieces 177 is made to have the same curvature as the outer circumferential surface curvature of the inner tube 2, (2), and the plurality The inner valve piece 177 is elastically contacted with the outer peripheral surface of the inner pipe 2 while the plurality of inner valve pieces 177 are opened and closed by the plurality of inner valve pieces 177.

The plurality of inner valve pieces 177 have a length in the longitudinal direction of the inner tube 2 capable of simultaneously opening and closing a plurality of through holes 12 arranged in the longitudinal direction of the inner tube 2.

In the seventh embodiment, the springs 175 and 175 are fixed to both sides of the plurality of shafts 177a or the outer tube 3, and the base ends of the plurality of inner valve pieces 177 are connected to the plurality of shafts 177a And the springs 175 and 175 are in contact with both sides of the plurality of inner valve pieces 177 so as to press the plurality of inner valve pieces 177 toward the inner tube 2 and the outer peripheral surface, However, the present invention is not limited thereto. As an alternative embodiment, the plurality of inner valve pieces 177 may be rotatably mounted on both sides of the plurality of shafts 177a or the outer tube 3, Wherein the plurality of inner valve pieces 177 are fixedly attached to the plurality of shafts 177a while the springs 175 and 175 are fixed to both sides of the plurality of shafts 177a, (3) so as to press against the outer peripheral surface of the outer tube (2).

At this time, the plurality of inner valve pieces 177 may be separated into several parts so as to be spaced apart from each other along the longitudinal direction of the inner pipe and to open / close the plurality of through holes 12. [

In the bubble generator of the seventh embodiment having the above-described structure, as the inner tube 2 rotates, the inner valve piece 177 is repeatedly opened and closed by successively closing the plurality of through holes 12, The fine bubbles or droplets can be discharged to the outside of the outer tube 3.

In the seventh embodiment, it is described that the tip of the inner valve piece 177 is in sliding contact with the outer circumferential surface of the inner tube 2. However, the present invention is not limited to this, (Not shown) that rotates with a rotation center parallel to the central axial line of the inner tube at its tip end so as to allow the inner roller to cross the plurality of through holes 12 while rolling, By causing the bubbles discharged through the plurality of through holes 12 to be cut, it is possible to make fine bubbles.

When a plurality of balls 7a or a plurality of elongated rollers 7b in the longitudinal direction of the inner tube 2 are interposed between the inner tube 2 and the outer tube 3 in the second embodiment, 15, a plurality of endoscope pieces 277 having a V-shaped cross-sectional shape for opening and closing the plurality of through-holes 12 of the inner tube 2 are provided on the outer peripheral surface of the inner tube 2 And a plurality of external teeth pieces 278 having a V-shaped cross-sectional shape for opening and closing the plurality of through holes 13 of the outer tube 3 are rotatably fixed on the inner circumferential surface of the outer tube 3 .

The structure for mounting the plurality of endoscope pieces 277 to the inner tube 2 is configured to extend in the longitudinal direction of the inner tube between the inner tube 2 and the outer tube 3 and to be spaced apart in the circumferential direction of the inner tube 2 An intermediate portion of a plurality of endoscope pieces 277 extending in the circumferential direction of the inner tube at intervals in the longitudinal direction of the plurality of shafts 277a is rotatably mounted on each of a plurality of shafts 277a whose both ends are fixed to the inner tube 2 And the end portions of the plurality of endoscope pieces 277 are in surface contact with the outer circumferential surface of the inner tube 2, A plurality of seat portions 203 are formed on the outer peripheral surface of the inner tube 2 facing the plurality of endoscope pieces 277 so that a step in the radial direction with respect to the outer peripheral surface of the inner tube 2 does not occur, One end of the end piece 277 is connected to the above- (12) so as to reliably close the plurality of through holes (12) when the plurality of through holes (12) are covered by a plurality of rollers (7a) or a plurality of rollers (7b) The protrusions 204 can be inserted into the plurality of through holes 12 on the radially inner surface of one end of the protrusion 277.

The structure for mounting the plurality of external fingers 278 on the outer tube 3 is configured to extend in the longitudinal direction of the inner tube between the inner tube 2 and the outer tube 3 and to be spaced apart in the circumferential direction of the inner tube 2 An intermediate portion of a plurality of outer sheath pieces 278 extending in the circumferential direction of the outer tube at intervals in the longitudinal direction of the plurality of shafts 278a is rotatably mounted on each of the plurality of shafts 278a fixed at the outer ends 3 on the outer surface 3 (278) extending in the circumferential direction of the outer tube so that both end portions of the plurality of outer female pieces (278) are in surface contact with the inner circumferential surface of the outer tube (3) A plurality of seat portions 205 are formed on the inner circumferential surface of the outer tube 2 facing the plurality of outer sheath pieces 278 so as to prevent a step in the radial direction from the inner circumferential surface of the outer tube 3, One end of the outer sheet piece 278 is connected to the plurality of balls (13) can be reliably closed when the plurality of through holes (13) are pressed by a plurality of rollers (7a) or a plurality of rollers (7b) 278 may be formed on the radially outer surface of one end of the protrusions 206, which can be inserted into the plurality of through holes 13.

In the bubble generator of the eighth embodiment having the above-described structure, as the inner tube 2 rotates, the plurality of balls 7a or the rollers 7b are rotated with the rotation or revolution so that the inner / outer outer piece 277, And the plurality of through holes 12 and the plurality of through holes 13 are successively closed and opened and repeated to cut the bubble blown out through the through hole 12 or the through hole 13 So that the fine bubbles can be discharged outside the outer tube 3.

Hereinafter, the bubble generator of the ninth embodiment according to the present invention will be described in detail with reference to FIG. 16 and FIG.

16 and 17 show the bubble generator of the ninth embodiment.

The bubble generator includes an inner tube 2 as a rotating body rotated by a motor 80 as in the second embodiment.

The upstream end of the inner tube 2 is connected to the gas supply means 5 in a flowable manner as in the second embodiment. The downstream end of the inner tube 2 is closed, and a cavity 11 is formed therein . A plurality of through holes (12) penetrating in the radial direction are formed on the circumferential surface of the inner tube (2) so as to be spaced apart in the axial direction and in the circumferential direction.

The inner tube 2 is circumscribed by the inner tube 2 so as to be rotatable via a plurality of balls 7a or a plurality of cylindrical rollers 7b in a state where the outer tube 3 fixed to the base is fixed to the base, The downstream end of the outer tube 3 is opened by a reduced diameter and the upstream end of the outer tube 3 is connected to a liquid supply source 9. [

When a plurality of balls 7a are interposed between the outer tube 3 and the inner tube 2 as shown in Fig. 16, at least one of the inner peripheral surface of the outer tube 3 and the outer peripheral surface of the inner tube 2 Wherein a plurality of ring-shaped concave portions (6) spaced in the axial direction of the inner tube (2) are formed in any one of the plurality of concave portions (6) And a plurality of balls 7a are seated on or spaced from the plurality of recesses 6 in a circumferential direction. 16 shows that the plurality of recessed portions 6 are formed only in the inner pipe 2. As shown in Fig.

In addition to the above structure, a plurality of ring-shaped dividing walls for rolling contact with the plurality of balls 7a are formed on the inner circumferential surface of the outer tube 3 facing the plurality of recesses 6 formed on the outer circumferential surface of the inner tube 2, 16, each of the plurality of partition walls 21 is provided with a plurality of through holes 22 spaced along the circumferential direction thereof and axially opened, And a recessed portion on which a plurality of balls 7a can be seated may be formed on the inner circumferential surface of the plurality of partition walls 21. [

When a plurality of rollers 7b are interposed between the outer tube 3 and the inner tube 2 as shown in Fig. 17, the inner peripheral surface of the outer tube 3 and the outer peripheral surface of the inner tube 2 (6) is formed in at least one of the inner tube (2) and the inner tube (2) in the axial direction of the inner tube (2) And a plurality of cylindrical rollers 7b are seated on the recessed portion 6 in contact with or spaced from each other in the circumferential direction. Fig. 17 shows that the concave portion 6 is formed only in the inner tube 2. [

17, a ring-shaped partition wall portion 21, which is in rolling contact with the plurality of rollers 7b, is formed on the inner circumferential surface of the outer tube 3 in the axial direction, At this time, each of the plurality of partition walls 21 is formed with a plurality of through holes 22 spaced apart along the circumferential direction thereof and axially opened.

The bubble generator of the ninth embodiment configured as described above can be operated as follows.

When the inner tube 2 is rotated while supplying the fluid from the liquid supply source 9 to the outer tube 3 and supplying the ambient air from the gas supply means 5 to the inner tube 2, the outer tube 3 and the inner tube 2 A plurality of balls 7a or a plurality of rollers 7b interposed between the tip ends of the plurality of rollers 7a and 7b are rotated in the circumferential direction of the inner tube 2, Each passing continuously across each of the plurality of through holes 12 arranged in a straight line in the circumferential direction of the inner pipe 2 so that the gas introduced into the inner pipe 2 flows into the inner pipe 2 The plurality of through holes 22 of the plurality of partition walls 21 formed in the outer tube 3 and the plurality of the plurality of rotating holes 22 of the plurality of partition walls 21 formed in the outer tube 3 are blown out into the outer tube 3 through the plurality of through holes 12, Passes through a gap between the balls 7a or the plurality of rollers 7b and rotates Is cut by the plurality of rotating balls 7a or the plurality of rollers 7b having the diameter smaller than the diameter of the bobbins and the diameter of the bobbles is smaller than the diameter of the bobbles. And can be discharged to the bubble supply target portion together with the liquid of the liquid supply source 9.

It is described that at least one of the inner circumferential surface of the outer tube and the outer circumferential surface of the inner tube is formed with the concave portion in the ninth embodiment, but the present invention is not limited to this, and the plurality of balls or the plurality The cylindrical rollers may be interposed between the inner circumferential surface of the outer tube and the outer circumferential surface of the inner tube closely or spaced.

In the bubble generator of the ninth embodiment, a plurality of balls or rollers are interposed between the inner tube and the outer tube. However, the elastic resilient piece 77 or the endoscope piece 277 of the sixth and eighth embodiments , And when the bubble generator is selectively stopped by the plurality of balls (7a) or the rollers (7b), the plurality of through holes (12) are positioned at a position where the plurality of through holes (12) When the inner valve piece 177 or the plurality of ball plungers 7 of the seventh embodiments are positioned at positions where the plurality of through holes 12 can be closed at the time of stopping the operation of the bubble generator, It is possible to surely close the through hole 12 and to prevent the penetration of foreign matter.

The particle size of the bubble produced by the bubble generator of the above embodiments becomes smaller as the number of revolutions of the inner tube 2 increases and becomes larger as the number of revolutions of the inner tube 2 decreases.

In the above embodiments, the diameter of the through-hole 12 of the inner tube 2 is preferably smaller in the direction in which the fluid passes, which is preferable from the viewpoint of reducing the diameter of the bubble ejected from the through-hole.

In the above embodiments, it is described that the plurality of rollers 7b rolls in the circumferential direction of the inner tube by a plurality of inner cylindrical rollers extending in the axial direction and rotating in the circumferential direction of the inner tube However, the present invention is not limited to this and is not shown. However, as a modified embodiment, a plurality of shafts are spaced apart in the circumferential direction of the inner tube between the inner tube and the outer tube so as to extend in the axial direction of the inner tube, And one of the plurality of rollers 7b may be fixedly or rotatably circumscribed in a state in which the one of the plurality of rollers 7b is not movable in the axial direction, The bubble generator is reliably designed by the plurality of rollers 7b in the through hole 12 or the through hole 13 The time difference of passing through the display device can be set.

In this modification, instead of the cylindrical roller extending in the axial direction, a plurality of rollers having axial lengths smaller than the diameter of the main plate are spaced apart from each other in the axial direction so that they are not movable in the axial direction Or the plurality of balls 7a of the embodiments may be fixedly or rotatably circumscribed in a state in which they are not axially movable on each of the plurality of axes And both ends of the plurality of shafts may be fixedly or slidingly brought into contact with the inner circumferential surface of a ring-shaped spring disposed on both sides of the inner tube to elastically press the plurality of balls or rollers by the ring-shaped spring .

Although the retainer or the outer tube is circumscribed in the inner tube in the above embodiments, the present invention is not limited thereto. As an alternative embodiment, the inner tube may be a rotator in a state in which the retainer or outer tube is excluded, Wherein the plurality of through holes 12 are formed on the circumferential surface of each of the plurality of through holes 12 and the base end is fixed adjacent to each of the plurality of through holes 12, (Not shown) each extending across the inner tube in the direction of rotation of the inner tube.

The bubble generator of the modified embodiment enables the bubble discharged out of the inner tube 2 through the plurality of through holes 12 of the rotating inner tube 2 to be cut by the plurality of blades, It is preferable from the viewpoint that fine bubbles can be formed only by rotation of the inner tube even in the state where the complicated retainer or the appearance is excluded.

When the bubble generator of the above embodiments is applied to a liquid reservoir having a large amount of foreign matter, the inner / outer elastic pieces 77 and 78, the inner / outer sheath pieces 277 and 278, the inner valve piece 177, When a plurality of balls 7a or rollers 7b or a plurality of ball plungers 7 are positioned at positions where the plurality of through holes 12 and 13 can be closed when the bubble generator stops operating, It is possible to surely close the plurality of through holes (12, 13) so that it is possible to prevent intrusion of foreign matter.

In the description of the above embodiments, a plurality of through holes arranged in a plurality of rows in the axial direction and a plurality of rows in the circumferential direction are formed in the inner tube 2 or the outer tube 3 in the axial direction and in the circumferential direction, 12, and 13 are formed in the inner tube 2. However, the present invention is not limited to this, and a plurality of through holes 12 may be formed in the inner tube 2 in a circumferential direction, , Or a plurality of through holes (12) arranged in an elliptical shape in a circumferential direction and axially spaced apart from one another in the inner tube (2) when a recessed portion for guiding a plurality of balls is formed on the inner tube or the outer tube .

At this time, the inner / outer elastic pieces 77, 78, the inner / outer sheath pieces 277, 278, the inner valve piece 177, the plurality of balls 7a or the rollers 7b, A plurality of ball plungers 7 are arranged in one line in the circumferential direction of the inner tube.

In the first to ninth embodiments, the outer tube or the inner tube is described as extending in the horizontal direction. However, the present invention is not limited to this, and although not shown, as another modified example, The distal end portion of the outer tube 3 is circumscribed at the distal end portion of the inner tube 2 which is disposed in the vertical direction or in an inclined state and the diameter of the plurality of through holes 12 of the inner tube 2 is in the vertical direction The bubble of the small diameter may be discharged out of the outer tube 3 through the plurality of through holes 13 in a state of having a constant diameter.

In the tenth embodiment, a plurality of through holes are formed in the circumferential surface of the inner tube erected in the vertical direction, and a plurality of through holes are formed in the circumferential surface of the outer tube. However, as the eleventh embodiment, As shown in the figure, the distal end portion of the inner tube 2 is formed into a disk cylinder 2 ', a plurality of through holes 12 are formed in the distal end face 2a of the disk cylinder 2' And a plurality of through holes 13 facing a plurality of through holes 12 of the disk cylinder 2 'are formed on the outer surface of the outer disk plate 3' May be formed on the disk plate 3 '.

At this time, as shown in Fig. 18, the disk cylinder 2 'may be a rotating body, and the outer disk plate 3' may be fixed to the base via the bracket 3a to become a fixed body.

The bubble generator of the eleventh embodiment configured as described above is configured such that when the disk cylinder 2 'or the outer disk plate 3' is rotated, the plurality of through holes 12 formed in the end face of the disk cylinder and the outer disk plate The plurality of through holes 13 of the plurality of through holes 13 are periodically communicated with each other and then become non-circulating so that the gas discharged through the plurality of through holes 12 is cut by the outer disk plate 3 ' And the fine bubbles have the same diameter because the positions of the plurality of through holes 12 are positioned at the same liquid depth.

As shown in Fig. 19, the outer disk plate 3 'of the eleventh embodiment is a twelfth embodiment, which extends in the radial direction of the disk barrel 2' and extends in the circumferential direction of the disk barrel 2 ' Can be replaced by a plurality of blades 3 "spaced at regular intervals.

The plurality of blades 3 "are in sliding contact with the distal end face 2a of the disk cylinder 2 'by elastic pressing means not shown, and the disk cylinder 2' The blades 3 "are fixed bodies, and the plurality of blades 3" serve to cut bubbles or droplets discharged through the plurality of through holes 12 of the inner tube 2. [

The elastic pressing means may be, for example, the elastic pressing means disclosed in Patent No. 10-2014-0015135 filed by the present inventor.

Further, the plurality of blades 3 "may have an elastic material to be elastically pressed against the distal end face 2a of the inner tube.

In the eleventh embodiment, the front end face 2a of the disk cylinder 2 'is in sliding contact contact with the outer disk plate 3'. In the thirteenth embodiment, as shown in FIG. 20 Likewise, a plurality of through holes 12 formed in the distal end face 2a of the disk cylinder 2 'are passed across the distal end face 2a' of the disk cylinder 2 ' A plurality of balls 7a or rollers 7b may be interposed between the outer plate 3 'and the outer plate 3'.

FIG. 20 shows a plurality of balls 7a interposed between the distal end face 2a of the disk cylinder 2 'and the outer dikes 3'.

In the thirteenth embodiment, since the front end surface 2a of the disk cylinder 2 'and the outer dike plate 3' are spaced apart from each other, the outer disk plate 3 ' It is not necessary to provide the through hole 13 and the through hole 13 and the through hole 12 should be arranged to face each other when a plurality of through holes 13 are formed in the outer disk plate 3 ' none.

At least one of the front end surface 2a of the disk cylinder 2 'and the outer disk plate 3' may be provided with recesses for guiding the plurality of balls or rollers as in the above embodiments have.

In the thirteenth embodiment, as in the fourth to eighth embodiments, the inner / outer elastic pieces 77, 78, the inner / outer sheath pieces 277, 278, the inner valve piece 177, A plurality of ball plungers 7 are interposed between the distal end face 2a of the disk cylinder 2 'and the outer die plate 3' so that a plurality of ball plungers 7 And the inner and outer elastic pieces 77 and 78 and the inner and outer sheath pieces 277 and 278 and the inner valve piece 177 may be opened and closed by the ball or roller, It is preferable from the viewpoint of reliably opening and closing the plurality of through holes 12 and 13 in a stable manner by elastically pressing the distal end face 2a of the disk cylinder 2. [

In the above description of the embodiments, a plurality of through holes 12 and 13 are formed in the inner tube 2 or the outer tube 3 in the circumferential direction. However, the present invention is not limited thereto, One through hole 12, 13 may be formed in the circumferential direction.

Further, in the bubble generator of the above-described embodiments, an unillustrated check valve that permits outside air flow from the upstream end to the downstream end to the base end portion of the inner tube 2 and does not allow the liquid flow from the downstream end to the upstream end is interposed The liquid does not enter the motor 80, which is preferable from the viewpoint of waterproofing.

Further, in the bubble generator of the above embodiments, the motor 80 is described as radiating heat by the outside air, but the present invention is not limited to this, and a motor having a known water-cooling type heat dissipation structure may be applied.

Although the motor 80 is described and shown as being disposed outside the water tank 1 in the bubble generator of the above embodiments, the motor 80 may be an underwater motor and disposed in the water tank 1, At this time, a plurality of through holes 89 formed in one side wall of the case 81 should be connected to the other end of an unillustrated suction pipe whose one end is exposed to the outside.

2; Inner tube, 3; Exterior

Claims (10)

1. A bubble generator comprising an inner tube (2) and an outer tube (3) circumscribed to the inner tube (2) or a retainer (30)
The inner tube (2) is a rotating body, and the outer tube (3) or one or a plurality of retainers (30)
On the peripheral surface of the inner tube (2), one group or a plurality of groups of one or a plurality of through holes in the circumferential direction is formed in the axial direction,
The upstream end of the inner pipe (2) is connected to the gas supply means in a clogged state,
The outer tube (3) or the one or more retainers (30) and the inner tube (2) are elastically contacted with the outer circumferential surface of the inner tube at the time of rotation of the rotating body, Means for passing through and opening and closing the through holes of the groups are interposed,
The gas supply means includes a rotary shaft of a motor coupled at one end to the upstream end of the inner tube, a fan which is fixedly circumscribed at one side or the other side of the rotary shaft of the motor to generate an ambient air flow, And a guide portion for guiding the bubble generator to the end thereof. The method according to claim 1,
Wherein the outside air flows through a space between the stator and the rotor of the motor from one side to the other side of the rotating shaft. 3. The method according to claim 1 or 2,
Means for traversing across said cross-
A plurality of balls 7a, a plurality of rollers 7b, a plurality of ball plungers 7, a plurality of elastic pieces, a plurality of valve pieces,
A teeth gear 21 provided on the outer circumferential surface of the inner tube 2; an inner tooth gear 31 provided on the inner circumferential surface of the outer tube 3; And a plurality of planetary gears (40) interposed between the external gear (21) and the internal gear (31) and meshing with the internal gear (31)
At least one of the plurality of valleys of the external gears 21 and the plurality of valleys of the internal gear 31 is formed with one or a plurality of groups of axially extending through holes in the circumferential direction Bubble generator. The method of claim 3,
The inner tube and the retainer are disposed in the liquid,
The inner tube (2) and the outer tube (3) are disposed in the liquid,
The downstream end of the outer tube 3 is connected to the bubble supply target portion, or
And the downstream end of the outer tube (3) is connected to the bubble supply target portion in a state where the outer tube (3) is connected to the liquid supply source. An inner tube 2 in which one or a plurality of through holes 12 are formed on the distal end surface 2a and which is connected to the gas supply means 5 so as to be flowable; And
And a plurality of blades (3 ") having an elastic material or resilient members interposed in sliding contact with each other so as to be elastically pressed against the distal end surface (2a) of the inner tube,
The inner tube 2 is a rotating body, the plurality of blades 3 "are fixed bodies,
The plurality of blades 3 " extend in the radial direction of the inner tube 2 and are spaced apart in the circumferential direction of the inner tube. The plurality of blades 3 "extend across the one or more through holes 12 Passing,
The gas supply means includes a rotary shaft of a motor coupled at one end to the upstream end of the inner tube, a fan which is fixedly circumscribed at one side or the other side of the rotary shaft of the motor to generate an ambient air flow, And a guide portion for guiding the bubble generator to the end thereof. 6. The method of claim 5,
Wherein the outside air flows through a space between the stator and the rotor of the motor from one side to the other side of the rotating shaft. An inner tube (2) having a distal end face (2a); And
A bubble generator including an outer disk plate (3 ') spaced apart from a distal end surface (2a) of said inner tube,
The inner tube (2) is a rotating body, the outer disk plate (3 ') is a fixed body,
A plurality of through holes are formed in the distal end surface (2a) of the inner tube (2)
The inner pipe (2) is connected to the gas supply means (5)
And is disposed between the distal end surface 2a of the inner tube and the outer disk plate 3 'to elastically contact the distal end surface of the inner tube at the time of rotation of the inner tube to cross the plurality of through holes formed in the distal end surface of the inner tube A means for passing or opening / closing is interposed,
The gas supply means includes a rotary shaft of a motor coupled at one end to the upstream end of the inner tube, a fan which is fixedly circumscribed at one side or the other side of the rotary shaft of the motor to generate an ambient air flow, And a guide portion for guiding the bubble generator to the end thereof. 8. The method of claim 7,
Wherein the outside air flows through a space between the stator and the rotor of the motor from one side to the other side of the rotating shaft. 9. The method according to claim 7 or 8,
And the plurality of through holes penetrate in the vertical direction. 9. The method according to claim 7 or 8,
The means for passing or opening /
Wherein a plurality of balls (7a), a plurality of rollers (7b), a plurality of ball plungers (7), a plurality of elastic pieces, a plurality of valve pieces, or a plurality of squeeze pieces are provided.

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