JP2006239573A - Bubble generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bubble generator being low-cost and extremely excellent in practical use, the bubble generator of which extremely simple unit configuration can realize stable gas microbubble formation and can enable highly efficient operation. <P>SOLUTION: The bubble generator comprises a suction port 3 for sucking a liquid such as bath water in a reservoir portion 5 provided in the reservoir portion 5 of a bath tub or the like, a dissolution tank 12 in which a gas such as air is pressurized to be dissolved in the liquid sucked from the suction port 3 and an injection port 4 for injecting the liquid containing a gas dissolved therein into the reservoir portion 5, wherein an infinite number of bubbles can be generated in the reservoir portion 5 by injecting the liquid containing a gas dissolved therein from the injection port 4, an openable and closable gas intake port 6 is provided between the suction port 3 and the dissolution tank 12, a gas release port 13 is provided in the dissolution tank 12 so that an excess gas in the dissolution tank 12 is automatically discharged, and a microbubble formation nozzle 7 for microbubble formation of the gas dissolved in the liquid is provided between the dissolution tank 12 and the injection port 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bubble generating device.

  Conventionally, an intake port that is used for generating fine bubbles in a bathtub or purifying tap water, etc., and is provided in a storage part such as a bathtub and sucks liquid such as bath water in the storage part, A dissolution tank that pressurizes and dissolves a gas such as air in the liquid sucked from the suction port, and an injection port that jets the liquid in which the gas is dissolved into the storage unit, and the liquid in which the gas is dissolved is provided. There has been proposed a bubble generating device configured to generate an infinite number of bubbles in a storage unit by being injected from an injection port.

  By the way, in the bubble generating apparatus as described above, if the amount of gas taken in is insufficient, the amount of gas dissolved in the liquid becomes insufficient, and the amount of fine bubbles deposited from the liquid decreases. If the intake amount is excessive, the gas cannot be completely dissolved in the liquid, and the excess gas is injected from the injection port through the nozzle or the like together with the liquid.

  That is, if the amount of gas dissolved in the liquid is insufficient, the amount of bubbles generated will be small and the bubble generation efficiency will deteriorate. On the other hand, if the gas is supplied excessively, it cannot be completely dissolved in the liquid. In addition, since it becomes a large bubble (separate from the liquid) and is discharged to the reservoir, fine bubbles cannot be supplied continuously and stably, and in this case the bubble generation efficiency also deteriorates. .

  Therefore, in the past, by taking in air bubbles and venting air from the dissolution tank via a control valve such as an electromagnetic valve that can be automatically controlled by predetermined programming, for example, an attempt was made to dissolve the gas in the liquid without excess or deficiency. .

  However, it is natural that the use of such a control valve in a small bubble generating device that is attached to a household bathtub is naturally expensive.

  In view of the present situation as described above, the present invention has found that there is still room for improvement in the solubility of the gas in the liquid and the nozzle shape in the dissolution tank as a result of intensive studies by the inventors and the like. In order to achieve high efficiency and low cost, stable gas microbubbles can be realized with an extremely simple device configuration, and more efficient operation can be achieved at a low cost. It aims at providing the bubble generator excellent in property.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A suction port 3 that is disposed in the storage unit 5 such as a bathtub and sucks liquid such as bath water in the storage unit 5, and a dissolution tank that pressurizes and dissolves gas such as air in the liquid sucked from the suction port 3. 12 and an injection port 4 for injecting the liquid in which the gas is dissolved into the storage unit 5, and innumerable in the storage unit 5 by injecting the liquid in which the gas is dissolved from the injection port 4. A bubble generating device for generating bubbles, wherein an openable and closable gas inlet 6 is provided between the suction port 3 and the dissolution tank 12, and the excess gas in the dissolution tank 12 is automatically transferred to the dissolution tank 12. A gas venting portion 13 configured to be discharged is provided, and a microbubble generation nozzle 7 is provided between the dissolution tank 12 and the injection port 4 to make the gas dissolved in the liquid into microbubbles. The present invention relates to a bubble generator characterized by the following.

  The microbubble generation nozzle 7 has a liquid introduction hole 8 formed on the liquid introduction side of the microbubble formation nozzle 7 and a plurality of liquid discharge holes 9 formed on the liquid discharge side. And the liquid outlet hole 9 are set to such a length and diameter that the liquid passing through the hole is decompressed to generate fine bubbles, and the fine bubble-forming nozzle is formed by the liquid introduced from the liquid introduction hole 8. The bubble generating device according to claim 1, wherein the liquid introduction hole 8 is configured so that a turbulent flow is generated in the inside.

  The bubble generating device according to claim 2, wherein the liquid introduction hole (8) is a spiral hole, and a spiral flow is generated in the microbubble generation nozzle (7) by the liquid introduced from the spiral hole. It is related to.

  4. The bubble generating device according to claim 2, wherein the liquid lead-out hole 9 is set to have a tapered shape in which at least one side opening thereof is increased in diameter toward the outside. 5. It is.

  Further, a guide for guiding the liquid so that the liquid is evenly introduced into the plurality of liquid introduction holes 8 on the liquid introduction side end face of the microbubble forming nozzle 7 in which the plurality of liquid introduction holes 8 are formed. The bubble generating apparatus according to any one of claims 2 to 4, wherein a body 10 is provided.

  Further, a bus cover 14 for closing a corner portion of a rectangular bathtub, and a mounting plate 17 in which a mounting portion 16 mounted on the edge of the bathtub is connected to a triangular base 15 and the mounting plate 17. A combination plate 19 that is combined with the plate 17 and has a square shape in a plan view when combined with the mounting plate 17 and a mounting portion 18 that is placed on the edge of the bathtub on at least one side. The bubble generating apparatus according to claim 1, wherein the bubble generating apparatus is provided on the bus cover 14.

  Since the present invention is configured as described above, it is possible to realize stable gas microbubbles with an extremely simple apparatus configuration, and to perform highly efficient operation at low cost and extremely excellent practicality. It becomes a generator.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  The liquid taken in from the suction port 3 is pressurized and dissolved in the dissolution tank 12 by the gas taken in from the gas intake port 6, and this liquid is discharged from the injection port 4 via the microbubble-forming nozzle 7 that makes the gas into microbubbles. It sprays in storage parts 5, such as a bathtub.

  At this time, an appropriate amount of gas can be taken in by opening the gas intake 6 while sucking liquid from the suction port 3, and further, for example, a rectifying action for keeping the inside of the dissolution tank 12 at a constant pressure. By providing the gas vent 13 made of a porous material that exhibits the above, excess gas in the dissolution tank 12, that is, the amount that cannot be completely dissolved in the liquid can be automatically discharged from the gas vent 13 .

  In other words, when the gas is dissolved in the liquid in the dissolution tank 12 and the amount of gas is insufficient, air can be taken in appropriately without stopping the operation, and the amount of air taken in from the gas intake 6 is temporarily assumed. Even if it is excessive, it is not possible to completely dissolve the liquid in the liquid (large air bubbles, that is, separate from the liquid), and the excess gas that causes the stable supply of fine air bubbles is automatically discharged. Therefore, an appropriate amount of gas can always be dissolved in the liquid in the dissolution tank 12.

  Therefore, only the liquid in which the liquid is dissolved in the dissolution tank 12 without excess or deficiency can be decompressed by the microbubble generation nozzle 7 and can be injected into the storage unit 5 from the injection port 4. If the amount of dissolved gas is large, the amount of bubbles released at the time of decompression can be constantly generated), and a highly efficient operation can be achieved with a simple configuration.

  Moreover, it is only necessary to attach the gas inlet 6 made of, for example, a cock, the gas venting portion 13 made of the porous material, etc., and the microbubble generation nozzle 7, so that it can be easily retrofitted to an existing bubble generator. From this point, it becomes more practical.

  Further, for example, the microbubble generation nozzle 7 has a liquid introduction hole 8 formed on the liquid introduction side of the microbubble generation nozzle 7 and a plurality of liquid discharge holes 9 formed on the liquid discharge side. The holes 8 and the liquid outlet holes 9 are set to such lengths and diameters that the liquid in which the gas passing through the holes is dissolved is decompressed to generate fine bubbles, and are introduced from the liquid introduction hole 8. When the liquid introduction hole 8 is configured so that a turbulent flow is generated in the microbubble generation nozzle 7 by the liquid to be generated, the gas is microbubbled when passing through the liquid introduction hole 8, and the microbubble generation nozzle 7 creates a gas-liquid mixed state by the turbulent flow in 7 and mixes fine bubbles uniformly, and further refinement is promoted when passing through the liquid outlet hole 9, and the refined bubbles are made constant. Can be generated in the reservoir 5 To become.

  In addition, for example, when the liquid introduction hole 8 is a spiral hole and the liquid introduced from the spiral hole is configured to generate a spiral flow in the microbubble generation nozzle 7, a more uniform gas-liquid A mixed state can be created.

  Further, for example, when the liquid outlet hole 9 is set to have a tapered shape in which at least one side opening thereof is expanded outwardly, the pressure change can be made gentle so that the generation of noise can be suppressed.

  Further, for example, the liquid is guided so that the liquid is evenly introduced into the plurality of liquid introduction holes 8 on the liquid introduction side end face of the microbubble generation nozzle 7 in which the plurality of liquid introduction holes 8 are formed. When the guide body 10 is provided, the turbulent flow can be generated more reliably by the liquid introduced from the plurality of liquid introduction holes 8.

  Further, for example, a bus cover 14 that closes a corner of a rectangular bathtub, and a mounting plate 17 in which a mounting portion 16 that is mounted on the edge of the bathtub is connected to a triangular base portion 15; A combination plate 19 that is combined with the mounting plate 17 and has a square shape in a plan view when combined with the mounting plate 17 and a mounting portion 18 that is mounted at least on one side on the edge of the bathtub. If it is configured to be provided on the bath cover 14 consisting of the above, it can be very easily attached to the bathtub.

  Therefore, the present invention provides a practical bubble generator that can realize stable and fine air bubbles with an extremely simple apparatus configuration and can be operated with high efficiency at a very low cost.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a suction port 3 that is disposed in a bathtub as the storage unit 5 and sucks bath water in the bathtub, and a dissolution tank 12 that pressurizes and dissolves air in the bath water sucked from the suction port 3. And an injection port 4 for injecting the bath water in which the air is dissolved into the reservoir 5, and injecting the bath water in which the air is dissolved from the injection port 4 to generate countless bubbles in the bathtub. A bubble generating device for generating gas, wherein an openable and closable gas intake 6 is provided between the suction port 3 and the dissolution tank 12, and excess gas in the dissolution tank 12 is automatically discharged to the dissolution tank 12. A gas venting section 13 is provided, and a microbubble generation nozzle 7 is provided between the dissolution tank 12 and the injection port 4 for microbubbles the air dissolved in the liquid. .

  Specifically, as shown in FIG. 2, the liquid inlet side of the suction port 3 and the circulation pump 1, the liquid outlet side of the circulation pump 1, the liquid inlet side of the dissolution tank 12, the liquid outlet side of the dissolution tank 12 and the injection port 4 are connected to each other by a circulation path 2. A known pump is used as the circulation pump 1. Further, as the circulation path 2, a synthetic resin hose, pipe, or the like is employed. Reference numeral 21 denotes a pressure gauge, and 23 denotes a cover body that conceals the circulation pump 1 and the like.

  Further, the suction port 3 and the injection port 4 are set so as to face different directions (for example, their directions are orthogonal to each other) so as not to take in fine bubbles from the suction port 3. Specifically, the suction port 3 is set to face in a direction orthogonal to the water surface and the injection port 4 is set to face in a direction parallel to the water surface in consideration of floating of the bubbles. In addition, the suction port 3 is provided with a filter (hair catcher) for preventing entry of foreign matter (hair etc.).

  In this embodiment, a gas intake 6 is provided between the circulation pump 1 and the suction port 3, and the gas intake 6 is kept open so that the circulation pump 1 can take bath water from the suction port 3. When inhaling the water, it is configured so that it can be automatically taken into the circulation path 2 by being drawn into the inhaled bath water.

  The gas inlet 6 of the present embodiment is a cock 11 that can adjust the opening by gripping and twisting the knob, but other configurations may be adopted as long as the opening can be easily adjusted. May be.

  In the dissolution tank 12 on the downstream side of the circulation pump 1, bath water sucked from the suction port 3 and air taken in from the gas inlet 6 are introduced and pressurized to dissolve the air in the bath water. It is configured to be able to. A known dissolution tank is used as the dissolution tank 12.

  The dissolution tank 12 is provided with a gas vent 13 made of a porous material via an air vent tube 22 connected to the upper exhaust port of the melt tank 12 so that excess air is discharged from the gas vent 13. It is composed.

  Therefore, in this embodiment, even if it is set so that a large amount of air is taken in from the gas inlet 6, excess air can be automatically discharged by the gas vent 13, so a troublesome setting with a simple structure is possible. As much air as possible can be dissolved in the bath water without having to do so.

  That is, if it is left as it is, it will be discharged as large bubbles together with the bath water, and excess air that will hinder the stable supply of fine bubbles can be discharged from the degassing part 13, and rectification as this degassing part 13 Since the porous material that works is used, the dissolution tank 12 can always be maintained at the specified pressure, and it is possible to realize an extremely simple structure that can dissolve air in bath water without excess or deficiency. become.

  In the present embodiment, the gas vent 13 is made of a high-temperature sintered ceramic (not a fine ceramic), but other materials, for example, other porous materials such as PP material, are used. It may be adopted.

  Further, when as much air as possible is dissolved in this way, a large amount of fine bubbles are generated by reducing the pressure of the bath water in the micro-bubble forming nozzle 7 described later, and a large number of fine bubbles are generated very efficiently. Can be generated.

  The microbubble generation nozzle 7 of the present embodiment is not simply a throttle like a general nozzle, but has a liquid introduction hole 8 on the liquid introduction side of the microbubble generation nozzle 7 as shown in FIG. A plurality of holes are formed, and a plurality of liquid outlet holes 9 are formed on the liquid outlet side. The liquid inlet hole 8 and the liquid outlet hole 9 are reduced in pressure by the liquid passing through the holes, thereby generating fine bubbles ( In other words, the liquid introduction hole 8 is configured to have such a length and diameter as to cause so-called cavitation), and the liquid introduced from the liquid introduction hole 8 causes a turbulent flow in the microbubble generation nozzle 7. It is.

  Moreover, the microbubble generation nozzle 7 is provided in the nozzle attachment part 20 of the near side position of the said injection nozzle 4 so that attachment or detachment is possible. Therefore, maintenance can be performed very easily.

  In the present embodiment, four liquid introduction holes 8 are provided at intervals of 90 degrees and two liquid outlet holes 9 are provided, that is, the bath water passing through the liquid outlet holes 9 is further decompressed. However, other configurations may be used.

  Accordingly, when the gas passes through the liquid introduction hole 8, the gas is made into fine bubbles, and a gas-liquid mixed state is created by the turbulent flow in the fine bubble formation nozzle 7 to uniformly mix the fine bubbles, and the liquid outlet hole 9. When passing through, further refinement is promoted.

  Specifically, in this embodiment, the liquid introduction hole 8 is a spiral hole, and the liquid introduced from the spiral hole is configured so that a spiral flow is generated in the microbubble generation nozzle 7. Miniaturization and homogenization can be further improved.

  In addition, although the liquid introduction hole 8 of this embodiment is formed in a spiral shape, even if it is in other shapes, it is configured so that a gas-liquid mixed state can be created by generating a turbulent flow in the microbubble generation nozzle 7. I need it.

  Further, the liquid is guided so that the liquid is uniformly introduced into the plurality of liquid introduction holes 8 on the liquid introduction side end face of the microbubble forming nozzle 7 in which the plurality of liquid introduction holes 8 are formed. A guide body 10 is provided.

  Accordingly, the amount of bath water passing through the spiral hole is made substantially uniform, and a good spiral flow can be created accordingly.

  Specifically, the guide body 10 has a conical shape, and has a configuration (so-called screw shape) in which the ridges 24 are provided spirally on the outer periphery. Accordingly, the bath water to be introduced is guided to each liquid introduction hole 8 substantially uniformly along the ridges 24 and the conical surface of the guide body.

  In this embodiment, the spiral direction of the ridges 24 is set in the same direction as the spiral direction of the liquid introduction hole 8 in order to introduce the bath water more smoothly, but may be set in the opposite direction. . Further, in the present embodiment, the conical guide body 10 is adopted, but other shape guide bodies may be adopted as long as the liquid can be guided to the liquid introduction hole 8 substantially uniformly.

  Further, the liquid outlet hole 9 of the microbubble generation nozzle 7 is preferably set to have a tapered shape in which the diameter of at least one side opening is increased outward. In the present embodiment, the opening portions on both sides are set in a tapered shape that increases in diameter outward. Thereby, the pressure change of the bath water passing through the liquid outlet hole 9 becomes gentle, and the noise caused by the sudden pressure change can be suppressed.

  Bath water in which a large amount of fine bubbles are scattered almost uniformly as described above after passing through the fine bubble-generating nozzle 7 is sprayed into the bathtub from the injection port 4 (nozzle), and the pressure is released to generate a large amount of fine bubbles. Will be generated in the bathtub. This large number of fine bubbles further enhances the warm bath effect. For example, when water is purified by being provided in a septic tank or the like, this purification capacity is further enhanced.

  In addition, as shown in FIG. 1, this embodiment is a bath cover 14 that closes a corner portion of a rectangular bathtub, and a mounting portion 16 that is mounted on the edge of the bathtub on a triangular base portion 15. Are combined with the mounting plate 17, and when combined with the mounting plate 17, it is square in a plan view and mounted on the edge of the bathtub on at least one side. It is desirable to provide it on the bus cover 14 according to Japanese Patent No. 2733648 obtained by the applicant, which is composed of the combination plate 19 provided with the mounting portion 18. In this case, the space can be saved and the attachment to the bathtub can be very easily performed.

  In addition, it has been confirmed that microbubbles having a diameter of about 5 to 100 μm can be stably generated by using this embodiment.

  Since the present embodiment is configured as described above, the air taken from the gas inlet 6 is dissolved in the bath water sucked from the suction port 3 under pressure in the dissolution tank 12, and the bath water is used as the fine bubbles. When injecting into the bathtub from the injection port 4 through the microbubble nozzle 7 to be converted, an appropriate amount of air can be taken in by opening the gas intake 6 while inhaling bath water from the intake port 3, Furthermore, by providing the degassing part 13 made of a porous material that exhibits a rectifying action for keeping the inside of the dissolving tank 12 at a constant pressure, for example, in the dissolving tank 12, excess air in the dissolving tank 12, that is, bath water The portion that cannot be completely dissolved can be automatically discharged from the gas vent 13.

  That is, when air is dissolved in the bath water in the dissolution tank 12 and the amount of air is insufficient, air can be appropriately taken in without stopping the operation, and the amount of air taken in from the gas inlet 6 is not limited. Even if it is excessive, it does not completely dissolve in the bath water from the dissolution tank 12 (large bubbles, that is, separate from the bath water), and automatically removes excess air that causes the stable supply of fine bubbles. Therefore, in the dissolution tank 12, an appropriate amount of air can always be dissolved in the bath water.

  Therefore, only the bath water in which the bath water is dissolved in the dissolution tank 12 without excess or deficiency can be decompressed by the micro-bubble generating nozzle 7 and sprayed from the spray port 4 into the bathtub. If the amount of air dissolved in the air is large, the amount of bubbles released at the time of decompression can be constantly generated), and a highly efficient operation can be performed with a simple configuration.

  Moreover, it is only necessary to attach the gas inlet 6 made of, for example, a cock, the gas venting portion 13 made of the porous material, etc., and the microbubble generation nozzle 7, so that it can be easily retrofitted to an existing bubble generator. From this point, it becomes more practical.

  The microbubble generation nozzle 7 has a liquid introduction hole 8 formed on the liquid introduction side of the microbubble formation nozzle 7 and a plurality of liquid discharge holes 9 formed on the liquid discharge side. And the liquid outlet hole 9 are set to such lengths and diameters that the bath water in which the air passing through the hole is dissolved is decompressed to generate fine bubbles, and is introduced from the liquid introduction hole 8. Since the liquid introduction hole 8 is configured so that turbulent flow is generated in the microbubble generation nozzle 7 by the bath water, the air is microbubbled when passing through the liquid introduction hole 8 and the microbubble generation nozzle 7 The gas-liquid mixed state is created by the turbulent flow of the liquid, so that the fine bubbles are uniformly mixed, and further miniaturization is promoted when passing through the liquid outlet hole 9, and the finely-sized bubbles are constantly put into the bathtub. Can be generated.

  In addition, since the liquid introduction hole 8 is a spiral hole, and the bath water introduced from the spiral hole is configured to generate a spiral flow in the microbubble generation nozzle 7, a more uniform gas-liquid mixing state is achieved. It can be created.

  In addition, since the liquid outlet hole 9 is set to have a tapered shape in which the opening portions on both sides are expanded outwardly, the pressure change can be moderated and the generation of noise can be suppressed.

  Further, a guide for guiding the liquid so that the liquid is evenly introduced into the plurality of liquid introduction holes 8 on the liquid introduction side end face of the microbubble forming nozzle 7 in which the plurality of liquid introduction holes 8 are formed. Since the body 10 is provided, the turbulent flow can be more reliably generated by the bath water introduced from the plurality of liquid introduction holes 8.

  Further, a bus cover 14 for closing a corner portion of a rectangular bathtub, and a mounting plate 17 in which a mounting portion 16 mounted on the edge of the bathtub is connected to a triangular base 15 and the mounting plate 17. A combination plate 19 that is combined with the plate 17 and has a square shape in a plan view when combined with the mounting plate 17 and a mounting portion 18 that is placed on the edge of the bathtub on at least one side. If it comprises so that it may provide in the bus cover 14 which consists of, the attachment to a bathtub can be performed very simply.

  Therefore, this embodiment is a practical bubble generating apparatus that can realize stable and fine air bubbles with a very simple apparatus configuration and can be operated with high efficiency at a very low cost.

It is a schematic explanatory perspective view of a present Example. It is an expansion outline explanatory perspective view of a present Example. It is an expansion schematic explanatory perspective view of the microbubble generation nozzle of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Inlet 4 Injector 5 Reservoir 6 Gas inlet 7 Microbubble nozzle 8 Liquid inlet 9 Liquid outlet
10 Guide body
12 Dissolution tank
13 Gas vent
14 Bus cover
15 base
16 Placement section
17 Mounting plate
18 Placement section
19 Combination board

Claims (6)

  An inlet that is disposed in a reservoir such as a bathtub and sucks liquid such as bath water in the reservoir, a dissolution tank that pressurizes and dissolves gas such as air in the liquid sucked from the inlet, and this gas dissolves A bubble generating device that generates an infinite number of bubbles in the storage unit by spraying the liquid in which the gas is dissolved from the injection port. A gas inlet that can be freely opened and closed is provided between the mouth and the dissolution tank, and a gas vent configured to automatically discharge excess gas in the dissolution tank is provided in the dissolution tank. A bubble generating device characterized in that a micro-bubble generating nozzle for forming a gas dissolved in the liquid into micro-bubbles is provided between the mouth.   The microbubble generation nozzle has a liquid introduction hole formed on the liquid introduction side of the microbubble generation nozzle and a plurality of liquid discharge holes formed on the liquid discharge side. The liquid introduction hole and the liquid discharge hole are respectively provided. The length and the diameter are set so that the liquid passing through the hole is depressurized to generate fine bubbles, and the liquid introduced from the liquid introduction hole is used to generate turbulent flow in the fine bubble forming nozzle. 2. The bubble generating device according to claim 1, wherein a liquid introduction hole is formed.   3. The bubble generating apparatus according to claim 2, wherein the liquid introduction hole is a spiral hole, and a spiral flow is generated in the microbubble generation nozzle by the liquid introduced from the spiral hole.   4. The bubble generating device according to claim 2, wherein the liquid lead-out hole is set to have a tapered shape in which at least one side opening thereof is increased in diameter toward the outside. 5.   A guide body for guiding the liquid so that the liquid is uniformly introduced into the plurality of liquid introduction holes is provided on a liquid introduction side end face of the microbubble forming nozzle in which the plurality of liquid introduction holes are formed. The bubble generating device according to any one of claims 2 to 4, wherein: It is a bus cover that closes the corner of a rectangular bathtub, and it is combined with a mounting plate in which a mounting portion that is mounted on the edge of the bathtub is connected to a triangular base, and this mounting plate. And when it is combined with the mounting plate, it has a rectangular shape in plan view and is provided on a bus cover comprising a combination plate in which a mounting portion mounted on the edge of the bathtub is connected to at least one side. The bubble generator according to any one of claims 1 to 5.

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