JP2002276886A - Wall component for fluid, air bubble generating system and filtering system therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall component for fluid, capable of restraining air bubbles from growing and preventing contamination components from adhering or being deposited by avoiding adhesion of the air bubbles, and to provide an air bubble generating system and a filtering system capable of efficiently purifying fluid with minute air bubbles. SOLUTION: In an air generating device 4, the minute air bubbles are generated by taking hot water 2 in a bath tub 100, and forcing the outside air into before discharging the hot water, and the hot water including a large volume of minute air bubbles is discharged to the bottom of the bath tub via a discharge piping 5. While the minute air bubbles are moving upward inside the bath tub, the contamination components in the hot water are attached to the air bubbles and the air bubbles absorbing and adhering to the contamination components and bubbles are taken from the vicinity of the water surface and taken unto a filtering device 7 via an intake piping 6. The hot water of which contamination components have been filtered and removed is returned to the bath tub. At least on an inner surface of the discharge piping and the intake piping, hydrophilic coating exerting affinity for water is formed for preventing the air bubbles from adhesion. The discharge piping and the intake piping may be constituted by a hydrophilic material. In this case, it is sufficient to apply only reinforcing covering exerting durability and strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid wall component used to define a space for storing and sending a liquid, and a bubble using the fluid wall component. It relates to a generation system or a filtration system.

[0002]

2. Description of the Related Art Conventionally, in order to purify a liquid stored in a storage tank, bubbles are blown into the liquid. That is, the dirt in the liquid is adsorbed on the bubbles blown into the liquid, and the bubbles adsorbing the dirt are removed to purify the liquid. In this case, air is mixed into the liquid in the bubble generator to generate bubbles, and the liquid containing the bubbles is discharged into the liquid in the storage tank.

[0003]

Incidentally, in the above-mentioned purification of liquid by blowing bubbles, it is preferable in terms of purification performance to make the blown bubbles as fine as possible.

However, in the above-described bubble generating device, even if fine bubbles are generated, the liquid containing the fine bubbles is expanded and grown by coupling of the bubbles in a discharge passage for discharging the liquid containing the fine bubbles into the storage tank. A situation may occur in which the liquid in the inside cannot be efficiently purified. That is, as shown in FIG. 5, the fine bubbles 10 rise while the liquid containing the fine bubbles 10 flows through the discharge passage 500 from left to right in FIG.
Then, the attached air bubbles are sequentially bonded and grow. When the bubbles accumulate, they grow into an excessively large air mass each time they grow to an excessive extent, and are discharged into the storage tank. For this reason, only a part of the fine bubbles generated by the bubble generator for purifying the storage tank is used, and the liquid cannot be efficiently purified.

[0005] Further, in the case where the liquid in the storage tank is taken in the bubble generation device, and the liquid is taken out of the storage tank and then discharged into the storage tank, the liquid itself containing the fine bubbles may be contaminated. Is mixed, the inconvenience that the dirt adheres and accumulates on the upper inner surface 501 via bubbles adhering to the upper inner surface 501 of the discharge passage 500 also occurs. Such adhesion and accumulation of dirt can also occur in an intake passage for introducing the foam adsorbed with dirt in the storage tank into, for example, a filtration device.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to avoid the adhesion of air bubbles and to suppress the growth of air bubbles and prevent the adhesion and accumulation of dirt. It is an object of the present invention to provide a fluid wall component, and in addition, to provide a bubble generation system and a filtration system capable of efficiently performing liquid purification by fine bubbles using such a fluid wall component.

[0007]

In order to achieve the above object, in the invention relating to a fluid wall component, a fluid wall component for defining an internal space for accommodating a liquid is applied to a liquid wall component. The inner surface that comes into contact with the substrate is formed so as to exhibit hydrophilicity (claim 1).

According to the first aspect, since the inner surface is formed so as to exhibit hydrophilicity, the liquid comes into contact with the inner surface preferentially and even if bubbles are contained in the liquid. Adhesion of the bubbles is surely suppressed. For this reason, even if the bubbles adsorb dirt,
The adhesion of the dirt to the inner surface is prevented. Such an effect is similarly achieved whether the internal space is a container-shaped internal space such as a storage tank or a tubular internal space such as a liquid flow pipe. Therefore, the present invention is useful as a fluid wall component for storing a liquid regardless of the storage state or the movement state.

In order to make the "inner surface exhibit hydrophilicity" of the first aspect, the following various configurations can be adopted.

[0010] First, a hydrophilic film may be formed on the inner surface by coating treatment (claim 2). In this case, the hydrophilic surface ensures that the inner surface exhibits hydrophilicity. As the material of the hydrophilic coating, for example, hydrophilic ceramics may be employed, and specifically, silica-based or magnesia-based hydrophilic ceramics may be employed. In addition, instead of the hydrophilic coating,
A hydrophilic treatment (for example, an oxidation treatment, an acid treatment, or an alkali treatment for the inner surface of the metal material) for imparting hydrophilicity to the inner surface may be performed. As a result, the inner surface layer changes to exhibit hydrophilicity.

Second, it may be formed in a tubular shape by using a hydrophilic material. That is, the entire pipe is formed of a hydrophilic material. Even in this case, the inner surface surely exhibits hydrophilicity. As the above-mentioned “hydrophilic material”, the same material as the material of the above-mentioned hydrophilic film may be used. When the entire tube is formed of a hydrophilic material as described above, a reinforcing portion for imparting durability may be integrally formed on the outer peripheral surface thereof (claim 4). Thereby, even if the pipe is entirely formed of a hydrophilic material, the pipe can be reinforced by the reinforcing portion and the durability can be improved. Here, as the “reinforcing portion”, formation of a reinforcing layer by resin coating (for example, thermosetting resin coating),
Alternatively, it is only necessary to form a coated outer cover with a metal outer cover.

According to the invention relating to the bubble generation system, a storage tank for storing liquid, a bubble generation device for generating bubbles in the liquid, and a discharge passage for discharging the liquid containing bubbles from the bubble generation device into the storage tank. And the discharge passage is formed by the fluid wall constituting material according to any one of claims 1 to 4 (claim 5).

According to the fifth aspect, when the liquid containing the bubbles generated in the bubble generator is discharged to the storage tank through the discharge passage, the discharge passage is formed by the above-mentioned fluid wall constituting material. Since the inner surface exhibits hydrophilicity, the bubbles do not adhere to the inner surface of the discharge passage, and all the bubbles are discharged together with the liquid into the storage tank. This suppresses the growth of air bubbles due to the adhesion to the inner surface, so that the air bubbles generated by the air bubble generator can be discharged to the storage tank as it is, and the liquid containing the air bubbles becomes dirty. Even if the dirt is contained in the air bubbles, the adhesion and accumulation of the dirt on the inner surface due to the adhesion of the air bubbles to the inner surface is prevented.

Further, in the invention relating to the filtration system, a storage tank for storing the liquid, and a liquid containing bubbles containing dirt adsorbed therein are taken in from the storage tank, filtered, and the filtered liquid is returned to the storage tank. And a take-in passage for taking the liquid containing air bubbles from the storage tank into the filtration device is formed by the fluid wall constituting material according to any one of claims 1 to 4. (Claim 6).

According to the present invention, when the liquid containing bubbles adsorbing dirt in the storage tank is taken into the filtration device through the intake passage, the intake passage is formed by the above-described fluid wall constituting material, and Since the inner surface exhibits hydrophilicity, air bubbles do not adhere to the inner surface of the intake passage, and all are filtered by the filtration device. This makes it possible to reliably prevent the dirt adsorbed by the bubbles from adhering and accumulating on the inner surface of the intake passage due to the adhesion of the bubbles to the inner surface.

[0016]

As described above, according to any one of the first to fourth aspects of the present invention, even if the liquid contained in the internal space contains bubbles, Adhesion of bubbles to the inner surface can be reliably suppressed. Thus, the growth of bubbles can be prevented, and even if the bubbles adsorb dirt, the dirt can be prevented from adhering to the inner surface. . Such a fluid wall constituting material is useful as a wall constituting a container such as a bathtub or a liquid storage tank (reservoir tank), or as a wall constituting various passages and pipes for distributing and flowing a liquid. It is suitable for applications where air bubbles are contained in a liquid.

In particular, according to the second aspect, the hydrophilic surface surely exerts the hydrophilicity by the hydrophilic coating, and the prevention of the growth of bubbles and the prevention of adhesion of dirt can be surely achieved.
According to the third aspect, since the entire pipe is formed of a hydrophilic material, the inner surface surely exhibits hydrophilicity and reliably achieves the above-mentioned effects as in the case of the second aspect. And hydrophilicity can be easily imparted to the inner surface. Furthermore, according to the fourth aspect, even when the entirety is formed of a hydrophilic material as in the third aspect, the durability can be improved by the reinforcement with the reinforcing portion.

According to the bubble generating system of the present invention, when the liquid containing the bubbles generated in the bubble generating device is discharged through the discharge passage into the storage tank, the bubbles adhere to the inner surface of the discharge passage. And all the bubbles can be discharged together with the liquid into the storage tank. This suppresses the growth of bubbles due to the adhesion to the inner surface, discharges the bubbles generated by the bubble generator into the storage tank as it is, and efficiently purifies the liquid in the storage tank by the bubbles. Will be able to do it. In addition, even if the liquid containing bubbles contains dirt and the dirt is adsorbed by the bubbles, the dirt adheres and accumulates on the inner surface due to the adhesion of the bubbles to the inner surface of the discharge passage. Can be prevented.

Further, according to the filtration system of the present invention, when the liquid containing air bubbles adsorbing dirt in the storage tank is taken into the filtration device through the intake passage, the air bubbles adhere to the inner surface of the intake passage. Can be prevented. As a result, it is possible to reliably prevent the dirt adsorbed by the bubbles from adhering and accumulating on the inner surface due to the adhesion of the bubbles to the inner surface of the intake passage, and to perform filtration by the filtration device. Efficiency can be improved.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a bath purification system using a fluid wall component according to an embodiment of the present invention. This bath purification system includes a hot water 2 in a bathtub 100 as a storage tank.
A bubble generation system 200 that discharges fine bubbles to (liquid) to adsorb dirt, and a filtration system 300 that takes in hot water containing bubbles (bubbles) that have adsorbed the dirt, filters the water, and returns it to the bathtub 100. Is applied.

The bubble generating system 200 includes the bathtub 10
Suction pipe 3 for taking in the hot and cold water 2 inside, and bubble generating device 4 for generating fine bubbles in the hot and cold water taken in
And a discharge pipe 5 as a discharge passage for discharging hot water containing a large amount of fine bubbles to the bottom in the bathtub 100.

Various known structures can be adopted as the bubble generating device 4. To briefly explain an example, a circulating pump for sucking the hot and cold water 2 from the bathtub 100 and discharging and circulating the same is used. There is a configuration including a venturi provided on the suction side of the circulation pump and a jet nozzle provided on the discharge side. In this case, while the inside of the venturi is in a negative pressure state and the outside air is sucked through the outside air introduction pipe, the outside air is mixed and dissolved in the hot and cold water taken in from the suction pipe by the pressure of the circulation pump, and then In addition, fine bubbles are generated by vigorously ejecting from the ejection nozzle. The hot and cold water containing the fine bubbles is discharged from the discharge pipe 5.
Through the bathtub 100.

On the other hand, the filtration system 300 comprises a bathtub 1
The intake pipe 6 as an intake passage for sucking the hot water 2 from the vicinity of the surface of the hot water 2 in 00, and a filtering device 7 for filtering dirt from the hot water and removing the dirt.
And a return pipe 7 for returning purified hot water from which dirt has been removed by the filtration device 7 to the bottom of the bathtub 100.

The filtering device 7 can also adopt various known configurations. To briefly explain an example, a circulating pump for circulating the hot water 2 from the bathtub 100 and returning it, and a hot water And a filter tank for filtering water. Then, while the filtered dirt is accumulated or discharged, the purified hot water after filtration is returned to the bathtub 100 through the return pipe 8.

In the case of the bubble generation system 200 and the filtration system 300 described above, in the process in which the fine bubbles discharged from the discharge pipe 5 of the bubble generation system 200 rise in the hot and cold water 2 by buoyancy, they exit the human body by taking a bath. Dirt such as dirt and soap scum adsorbs to the fine bubbles. And
When the air bubbles and bubbles with the adsorbed dirt rise to near the water surface,
The purified hot water that has been sucked in through the intake pipe 6 of the filtration system 300 and filtered in the filtration device 7 is returned to a desired position of the bathtub 100 again, for example, the bottom, through the return pipe 8. By repeating this, the hot and cold water 2 in the bathtub 100 is always kept in a clean state.

FIG. 2 shows a bath purifying system different from the above bath purifying system (see FIG. 1) in the circulation path of hot and cold water for bubble generation and filtration. The same components as those in FIG. 1 are denoted by the same reference numerals as in FIG.

In the bath purifying system shown in FIG. 2, the purified hot water filtered by the filtering device 7 of the filtering system 300 'is not directly returned to the bathtub 100', but the purified hot water is supplied from the filtering device 7 to the supply pipe. 9 to the bubble generation device 4 of the bubble generation system 200 'is supplied to the suction side thereof. In the bubble generating device 4, hot water containing a large amount of fine bubbles is discharged to the discharge pipe 5 by mixing and dissolving the outside air into the supplied purified hot water and jetting it from the jet nozzle.

In the case of the bath purifying system of FIG. 2, the number of pipes connected to the bathtub 100 'is smaller than that of the case of FIG. 1, and the filtering device required in the bath purifying system of FIG. It is also possible to omit the circulation pump of 7 and use the circulation pump of the bubble generator 4 as well.

<First Embodiment> In each of the above bath purifying systems, the discharge pipe 5 of the bubble generation system and the intake pipe 6 of the filtration system are formed of the fluid wall component according to the following embodiment of the present invention. ing. The fluid wall component may be applied to at least one or both of the discharge pipe 5 and the intake pipe, and the fluid wall component is applied to all the pipes 3, 5, 6, 8, and 9. May be.

The discharge pipe 5 and the intake pipe 6 are shown in FIG.
As shown in the figure, a pipe main body 51 which is a main component of the pipe,
And a hydrophilic film (hydrophilic layer) 52 formed on the inner surface side of the tube main body 51. The tube main body 51 is formed of a metal tube (for example, a copper tube) or a synthetic resin tube, and the hydrophilic film 52 is formed of a hydrophilic ceramic such as silica or magnesia. Such a hydrophilic film 52 may be formed by various processes, for example, by a coating process.

In the case of the first embodiment, when hot water containing a large amount of fine bubbles is discharged from the bubble generator 4 into the bathtub 100 or 100 'through the internal space of the discharge pipe 5, the hot water is discharged. Although the microbubbles 10 have a tendency to rise toward the inner surface 50 at the top of the discharge pipe 5 due to buoyancy, the inner surface 50 is formed by the hydrophilic coating 52 and exhibits hydrophilicity. Water and water are preferentially contacted with each other, so that the adhesion of the fine bubbles 10 to the inner surface 50 is prevented and suppressed. Therefore, the fine bubbles 10
The growth and stagnation of air bubbles caused by adhering to the inner surface 50 can be avoided, and the fine air bubbles 10 generated by the air bubble generator 4 can be directly discharged to the bathtub 100 or 100 '. This makes it possible to improve the efficiency of adsorption and removal of dirt from the hot and cold water 2 in the bathtub 100 or 100 '.

<Second Embodiment> FIG. 4 shows a discharge pipe 5 and a take-in pipe 6 to which a fluid wall component according to a second embodiment is applied.

The discharge pipe 5 and the intake pipe 6 of the second embodiment are provided with a pipe body 53 formed of a hydrophilic material,
The outer surface of the tube main body 53 is covered with a reinforcing outer skin 54 as a reinforcing portion. The tube main body 53 is formed in a tube shape using, for example, a hydrophilic ceramic such as silica or magnesia, and the reinforcing outer cover 54 is formed by, for example, a metal or synthetic resin cylindrical outer cover or a synthetic resin. It is formed by coating or the like.

In the case of the second embodiment, the pipe body 53
Since the material itself is formed of a hydrophilic material, the inner surface 50 also exhibits hydrophilicity. For this reason,
As in the case of the first embodiment, hot and cold water comes into contact with the inner surface 50 preferentially, so that adhesion of the fine bubbles 10 to the inner surface 50 is prevented and suppressed. Thereby, fine bubbles 1
The growth and stagnation of bubbles caused by the fact that 0 adheres to the inner surface 50 can be avoided, and the fine bubbles 10 generated by the bubble generator 4 can be directly discharged to the bathtub 100 or 100 '. Then, the efficiency of adsorption and removal of the dirt of the hot and cold water 2 in the bathtub 100 or 100 'can be improved.

<Other Embodiments> The present invention relates to the first embodiment.
The present invention is not limited to the second embodiment, and includes various other embodiments. That is, the reinforcing portion in the second embodiment may be formed partially on the outer surface, or may be formed by winding a belt-like reinforcing material.

As the discharge pipe 5 and the intake pipe 6, for example, the pipe body is formed of a metal pipe such as copper, and the inner surface of the pipe body is given a hydrophilic property such as an oxidation treatment, an acid treatment or an alkali treatment. By performing the hydrophilic treatment, the inner surface may be formed so as to exhibit hydrophilicity. As an example of the oxidation treatment for imparting hydrophilicity, there is a treatment in which the inner surface of a copper tube is subjected to cuprous oxide treatment to oxidize the copper surface. In the oxidation treatment in this case,
The inner surface of the copper tube is subjected to chemical polishing, water washing, cuprous oxide treatment, water washing, hot water washing (hot water washing at about 60 ° C.), and drying. As the chemical polishing, for example, a rinsing treatment using an aqueous solution of nitric acid and sulfuric acid is performed, and as the cuprous oxide treatment, for example, copper sulfate pentahydrate (CuSO ₄ .5H ₂ O) is used.
6 g, 1.8 g of sodium hydrogen carbonate, and borax (Na
₂ B ₄ O ₇ · 10H ₂ O; sodium tetraborate decahydrate) in 0.2
g is mixed, and water is added to make 50 ml of an aqueous solution, and the copper tube may be immersed for 5 minutes at 80 ° C.

In the above-described embodiment, a description has been given of the case where the fluid wall component is applied to a tubular member such as the discharge pipe 5 or the intake pipe 6. However, the present invention is not limited to this. For example, a hole is formed inside a block-shaped main body. When the discharge passage or the like is formed, the fluid wall component may be used. Further, the wall component for fluid of the present invention may be applied to a wall material forming an internal space of a storage tank or a container such as the bathtub 100 or 100 ′ or a filtration tank of the filtration device 7. In this case, it is particularly useful for preventing adhesion and accumulation of dirt due to adhesion of air bubbles.

In the above embodiment, the bubble generating systems 200 and 200 'and the filtration systems 300 and 300' are applied to the bathtubs 100 and 100 'to purify the hot water 2 in the bathtubs 100 and 100'. However, not limited to this,
For example, the present invention may be applied to a fish tank for raising fish, a storage tank for water treatment, a pool, an artificial pond, or the like, and may be used for purifying internal water and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a bath purification system to which an embodiment of the present invention is applied.

FIG. 2 is a schematic diagram of a bath purification system having a configuration different from that of FIG. 1;

FIG. 3 is a partially enlarged sectional view showing a first embodiment of a fluid wall component.

FIG. 4 is a view corresponding to FIG. 3, showing a second embodiment of the fluid wall component.

FIG. 5 is a partially enlarged cross-sectional view for explaining a conventional problem.

[Explanation of symbols]

 2 Hot water (liquid) 4 Bubble generator 5 Discharge pipe (discharge passage) 6 Intake pipe (take passage) 7 Filtration device 10 Microbubbles (bubbles) 50 Inner surface 52 Hydrophilic coating 54 Reinforcement outer skin (reinforcement part) 100, 100 ' Bathtub (reservoir) 200 Bubble generation system 300 Filtration system

Claims (6)

[Claims] 1. A fluid wall constituting material for defining an internal space in which a liquid is stored, wherein an inner surface that comes into contact with the liquid is formed so as to exhibit hydrophilicity. Characteristic wall component for fluids. 2. The fluid wall component according to claim 1, wherein a hydrophilic film is formed on the inner surface by a coating treatment. 3. The fluid wall component according to claim 1, wherein the fluid wall component is formed in a tubular shape using a hydrophilic material. 4. The fluid wall component according to claim 3, wherein a reinforcing portion for imparting durability is integrally formed on the outer peripheral surface. 5. A storage tank for storing a liquid, a bubble generator for generating bubbles in the liquid, and a discharge passage for discharging a liquid containing bubbles from the bubble generator into the storage tank. A bubble generation system, wherein the passage is formed of the fluid wall component according to any one of claims 1 to 4. 6. A storage tank for storing a liquid, and a filtration device for taking in a liquid containing bubbles adsorbing dirt from the storage tank, filtering the liquid, and returning the filtered liquid to the storage tank. A filtration system, characterized in that a take-in passage for taking in a liquid containing the above from the storage tank into a filtration device is formed by the fluid wall constituting material according to any one of claims 1 to 4.