JP7564262B2 - Microbubble water header pipe supply system - Google Patents

Description

The present invention relates to a header pipe supply system for fine bubble water, which comprises a fine bubble water generator that breaks down the air contained in tap water to micro- or nano-sized levels, and is installed near the receiving point from the water supply company, and supplies the fine bubble water to multiple points where it is used.

Microbubble water refers to water that contains a lot of air, with the bubbles being micrometer or nanometer sized (approximately 50-500 nm in diameter) with diameters of roughly 100 μm or less. Since the bubbles are smaller than pores, they can penetrate pores and sweat glands and effectively remove dirt, so it is used for a variety of purposes, such as shower water and facial washing water, for beauty and health purposes.

Furthermore, this type of fine bubble water penetrates more efficiently between the fibers of clothing and other materials, and also comes into close contact with the surfaces of tableware and other items, so in recent years it has come to be widely used as cleaning water, including laundry water and toilet seat cleaning water.

The cleaning effect of fine bubble water, which is due to the electrical action of the fine bubbles contained in it, has also attracted attention. The surfaces of the fine bubbles contained in fine bubble water are often negatively charged, and the bubble water has the property of finely separating, diffusing, and floating in the water without combining with each other. In contrast, dirt caused by oil, sebum, small foreign matter, etc. is often positively charged and is electrically bonded to the negatively charged object being cleaned. As a result, when negatively charged fine bubbles adsorb to positively charged dirt, the dirt is electrically neutralized, making it easier to separate from the object being cleaned. The dirt that is electrically neutralized and separated from the object being cleaned remains adsorbed to the gas-liquid interface of the fine bubbles and rises to the water surface due to the buoyancy of the bubbles, and it has been found that the dirt removed from the object being cleaned is cleaned in fine bubble water without adhering to the object again.

Methods known for producing liquids containing many of these microscopic bubbles include high-speed shearing, pressurized collapse, and cavitation, but most of these involve sucking in air from the outside using an aspirator method, or forcibly injecting it.

A known device that introduces air from the outside is a microbubble generator that generates microbubbles by causing cavitation in a casing of a mixed fluid consisting of a liquid accelerated by an acceleration means and a gas (bubbles with a diameter of about a few millimeters) introduced into a casing by a gas-liquid mixing means (see, for example, Patent Document 1).

A microbubble generator is also known that has a first nozzle on the water inlet side, the cross-sectional area of which perpendicular to its central axis gradually decreases from the inlet to the outlet, a second nozzle on the water outlet side, which is connected to the outlet of the first nozzle on the inlet side through a communication passage that is connected to the outlet of the first nozzle on the inlet side and the cross-sectional area of which perpendicular to its central axis gradually increases from the inlet to the outlet, and a gap or side chamber that is open only to the communication passage (see, for example, Patent Document 2).

JP 2007-021343 A JP 2009-136864 A

However, the microbubble generator described in Patent Document 1 uses a gas-liquid mixing method that accelerates water stored in a tank, and this method requires a large device, which is not suitable for general residences where a simple type that is directly connected to a water pipe is required.

The microbubble generator in Patent Document 2 generates microbubbles from dissolved air in water using a cavitation method without drawing in air from the outside, so it can be directly connected to a water supply and is suitable for general residential use. However, since it is necessary to ensure a constant amount of water depending on the water pressure conditions at the installation location, Patent Document 2 provides a side chamber between the first and second nozzles whose size can be changed by an adjustment mechanism, so the overall nozzle structure is complex and the work of attaching it to a residential water supply pipe is complicated. Note that the water supply pipe here is not a so-called completely buried pipe or sealed pipe, but a pipe installed so that construction can be carried out after installation.

The present invention was made in consideration of the problems with the conventional technology described above, and in consideration of the fine bubble water generators that were installed at each end of tap water usage points as necessary in tap water supply systems in ordinary homes, and aims to provide a header pipe supply system for fine bubble water that can be easily attached to the base of a cold or hot water supply pipe, and that generates fine bubble water and supplies all tap water, cold water, and hot water supplied within the home.

In order to solve the above problems, a first aspect of the present invention provides a header pipe supply system for fine bubble water, comprising: a header pipe having a plurality of branch water supply holes for receiving tap water supplied from a tap water main pipe via a water meter and branching it to a plurality of tap water demand locations; a plurality of fine bubble water generators connected to each of the plurality of branch water supply holes and for reducing the size of bubbles contained in the tap water; and a fine bubble water generating hose connected to each of the water outlets of the fine bubble water generators and supplying fine bubble water to the plurality of tap water demand locations individually without branching the water along the way, wherein the header pipe is formed from a metal pipe made of brass or stainless steel, each of the plurality of branch water supply holes is provided with a connection means for screwing onto the fine bubble water generator, and the fine bubble water generating hose is formed from a flexible material for supplying the fine bubble water supplied from the water outlet of the fine bubble water generator individually to each of the plurality of tap water demand locations without any seams along the way .

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A second aspect of the present invention is a header pipe including a first adapter having a water heater branch water supply hole for receiving tap water supplied from a tap water main pipe via a water meter and supplying it to a water heater, and a second adapter having a plurality of branch water supply holes for branching the tap water supplied via the first adapter to a plurality of tap water demand points , a plurality of fine bubble water generators connected to the water heater branch water supply hole and the plurality of branch water supply holes, respectively, for finely reducing bubbles contained in the tap water, and a plurality of fine bubble water generators connected to each of the water outlets of the fine bubble water generators, for providing a water supply between the water heater and the plurality of tap water demand points. and a fine-bubble water generating hose that supplies fine-bubble water individually to the water heater and the plurality of tap water demand locations without branching along the way, wherein the header pipe is formed from a metal pipe made of brass or stainless steel, the branch water supply hole for the water heater and the branch water supply hole are provided with connection means that screw onto the fine-bubble water generator, and the fine-bubble water generating hose is formed from a flexible material that supplies fine-bubble water supplied from the outlet of the fine-bubble water generator individually to the water heater and the plurality of tap water demand locations without any seams along the way .

Here , the first adaptor and the second adaptor are connected by screwing a hose made of a flexible material or a metal tube.

The fine bubble water generator is composed of a water intake plate having a plurality of water intake holes for taking in tap water from the branch water supply hole for the water heater or the branch water supply hole, and a fine bubble water generating nozzle arranged downstream of the water intake plate, and the fine bubble water generating nozzle is characterized in that it has a first water passage whose diameter gradually decreases along the direction in which the tap water flows, a second water passage that is connected to the outlet side of the first water passage and whose diameter gradually increases along the direction in which the tap water flows, and a throttle section connecting the first water passage and the second water passage .

In addition, the multiple water intake holes have central axes extending from the inlet side to the outlet side that are inclined relative to the central axis of the water intake plate, and are arranged at equal intervals in a circular shape at positions a predetermined distance away from the central axis of the water intake plate .

The inner surface of the water intake hole is formed with an uneven surface for generating a turbulent flow, and the water intake hole is formed so as to be curved from the water inlet side toward the water outlet side.

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The header pipe supply system for fine bubble water according to the present invention makes it possible to generate fine bubble water from cold/hot tap water and supply it to points of demand in a tap water supply system for an ordinary home .

A particularly important technical feature of this header pipe supply system for fine bubble water is that by locating the header pipe that supplies the fine bubble water near the point where water is supplied from the waterworks department and receives maximum water pressure, it is possible for the fine bubble water to contain a greater number of micrometer-sized bubbles, and this fine bubble water can be supplied to all water supply points within the home.

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1 is a schematic diagram of a tap water supply system in a typical house to which a header pipe supply system for fine bubble water according to the present invention is applied; FIG. 2 is a side view of a header pipe supply system for fine bubble water. FIG. 2 is a side cross-sectional view of a header pipe supply system for fine bubble water. 4 shows a cross-sectional view taken along line AA in FIG. 1 is a side cross-sectional view of a fine bubble water generator according to the present invention. FIG. 2A shows a perspective view of the fine bubble water generator as seen from the upstream side, and FIG. 2B shows a perspective view of the fine bubble water generator as seen from the downstream side. The water intake section of the fine bubble water generator is shown in (a) as a plan view from the upstream side, (b) as a side view, and (c) as a plan view from the downstream side. 1 shows a schematic diagram of cavitation action in a nozzle. FIG. 2 is a side view of a water intake section having a curved water intake hole. FIG. 1 shows examples of a water supply pipe system that supplies water from a main water supply pipe through a water meter to multiple water demand points within a home, where (a) shows an example in which water supply pipes are branched off at various points within the home, and (b) shows an example in which a header pipe is used to supply water from the header pipe to each water demand point within the home. This shows an example of conventional piping that supplies cold and hot tap water from a tap water main through a water meter to multiple tap water demand points such as a bathroom, washing machine, sink, kitchen, and toilet within a home.

Figure 1 shows a schematic diagram of an example of a tap water supply system in a typical house to which the header pipe supply system for fine bubble water according to the present invention is applied.

Before explaining in detail the header pipe supply system for microbubble water according to the present invention shown in Figure 1, an example of a conventional tap water supply pipe system will be described for comparison.

Figure 11 shows an example of a conventional tap water supply system for a typical home. As shown in Figure 11, tap water supplied by a local government waterworks bureau, for example, is supplied to the home via a water distribution valve 20 that distributes tap water from the main tap water supply pipe, a water supply pipe 21 to which the water is distributed, a first stop valve 22, an auxiliary stop valve 23, and a water meter (water usage meter) 24.

In FIG. 11, tap water supplied to a house via a water meter 24 is often supplied to a water heater 25 via a branch pipe 32a within the home, and the tap water (cold water) that passes through branch pipe 32a is branched out to tap water usage points within the house, such as the toilet (for flushing the toilet bowl and for watering the toilet seat) 26, washing machine 27, kitchen sink 28, bath and shower 29, washbasin 30, outdoor water tap 31, etc., and is used in each of these locations.

The hot water heated by gas or electricity in the water heater 25 is then diverted by a hot water supply pipe system 34, which is separate from the cold water supply pipe system 33 that branches off tap water (cold water), and is then diverted to, for example, a toilet (for a warm water washing toilet seat) 26, a kitchen sink 28, a bath and shower 29, a washbasin 30, etc., and used in each of these locations.

Here, the cold water supply pipe system 33 and the hot water supply pipe system 34 that branch off tap water (cold water) are usually installed under the floor (including basement) or within the walls of the house.

In recent years, there has been a dramatic increase in the demand for installing microbubble water generators, which break down the air contained in tap water into micro- or nano-sized particles, in locations where tap water or hot water is used, such as toilets (for flushing toilets and warm water washing toilet seats) 26, washing machines 27, kitchen sinks 28, baths and showers 29, and washbasins 30.

Fine bubble water refers to tap water (cold water) or hot water that contains a lot of air, with bubbles of micrometer or nanometer size (diameter of about 50 to 500 nm) that are approximately 100 μm or less in diameter. Since the bubble water is smaller than pores and can penetrate pores and sweat glands to effectively remove dirt, fine bubble water is used for a variety of purposes, particularly for beauty and health purposes, such as shower water and facial washing water.

Furthermore, this type of fine bubble water effectively penetrates into the small gaps between the fibers of clothing and other materials, and also comes into close contact with the surfaces of fabrics, tableware, skin, etc., and so in recent years has come to be widely used as washing water and cleaning water for warm water washing toilet seats, etc.

Moreover, recently, many washing machines are equipped with micro-bubble water generators inside the water inlet or shower head, and they have become particularly popular in recent years.

Conventionally, such microbubble water generators, which generate water containing many micrometer- or nanometer-sized bubbles in tap water (cold water) or hot water, have been installed at each point where tap water is used (showers, washing machines, warm-water washing toilet seats, etc.).

The present invention was made in consideration of the need for a fine bubble water generator, which was previously installed as necessary at each end of a tap water usage point in the conventional tap water supply system in an ordinary home as described above, and provides a header pipe supply system for fine bubble water that can be easily attached near the base of the main cold water and/or hot water supply pipe of a water supply system for a home, etc., thereby generating fine bubble water and supplying all tap water cold water and hot water supplied within the home.

As a first embodiment of the header pipe supply system for fine bubble water according to the present invention, a configuration is described in which only cold water is produced as fine bubble water and supplied to tap water usage points within the home.

In this first embodiment, the system is composed of a water pipe connection unit 100 (for cold water) that is connected via a water meter 24 through a main water pipe that receives tap water supply, a first adapter 11a (shown in FIG. 1) that constitutes the water pipe connection unit 100, and a fine bubble water generating unit (13a to 13e shown in FIG. 2) that is connected to the first adapter 11a.

Next, as a second embodiment, a configuration will be described in which cold water (tap water) and hot water (which in this application means "hot water supplied from an external source such as a water heater installed in the home or a local hot water supply system") are separately produced into fine bubble water and fine bubble hot water (collectively referred to simply as "fine bubble water" in this application as appropriate) and then supplied to tap water usage points in the home such as showers and washing machines.

In this second embodiment, the cold water pipe connection unit 100 (FIGS. 1 and 2) connected via the water meter 24, the hot water pipe connection unit 101 (FIG. 1), the first adapter unit (in this application, simply referred to as the "first adapter") 11a constituting the cold water pipe connection unit 100, the fine bubble water generating unit (13a to 13e shown in FIG. 2) connected to the first adapter 11a, the second adapter 11b (in this application, simply referred to as the "second adapter") constituting the hot water pipe connection unit 101 (FIG. 1) (note that this second adapter 11b has the same configuration as the first adapter 11a shown in FIG. 2, and therefore is not shown), and the fine bubble water generating unit (corresponding to 13a to 13e shown in FIG. 2 and having the same configuration, and therefore not shown) connected to the second adapter 11b are configured.

As mentioned above, in cases where, although rare in modern times, there are homes that only use cold water and not hot water (i.e. homes or facilities that do not have a water heater) or where it is desired to generate fine bubble water from only cold water, the first embodiment described above should be adopted. In cases where, like the majority of general homes, it is desired to generate fine bubble water from not only cold water but also hot water supplied from a water heater, etc., the second embodiment described above should be adopted.

Below, for the reasons mentioned above, we will mainly explain the second embodiment in which cold water and hot water are converted into fine bubble water and used.

Figure 1 shows an example of a header pipe supply system for fine bubble water according to the second embodiment of the present invention, which converts cold water and hot water into fine bubble water and utilizes the water.

In FIG. 1, the first adapter 11a constituting the cold water pipe connection unit 100, which is connected via the water meter 24, is connected to the fine bubble water generating units 13a to 13e shown in FIG. 2, and the second adapter 11b constituting the hot water pipe connection unit 101 is connected to the same or equivalent fine bubble water generating units 13a to 13e (shown in FIG. 2).

Here, as shown in FIG. 2 or FIG. 3, the water pipe connection unit 100 has a first adapter 10 shown in FIG. 2 that also serves as a tap water branching means, or a first adapter 10 having a tap water branching means shown in FIG. 3(a), on the upstream side where tap water (cold water) is supplied.

The first adapter 10 shown in FIG. 2 receives tap water from the left side of the figure, and the first adapter 10 branches the water into water to be supplied to the water heater side and water to be supplied to tap water usage points such as washing machines and toilets (cold water).

As shown in FIG. 3, tap water flows into the first adapter 10 from the left side of FIG. 3(a), and the first adapter 10 having a branching means may branch into water to be supplied to the water heater side (shown in FIG. 13a) and water to be supplied to tap water usage points such as washing machines and toilets (cold water) (shown in FIG. 13b).

The first adapter 10 and the second adapter 11, which is disposed downstream of the first adapter 10 and has one end joined to the water pipe on the tap water demand side, are of course connected (Fig. 2) or joined (Fig. 3) at the water pipe joint via, for example, a ring-shaped packing (not shown) that prevents water leakage.

The connection between the first adapter 10 and the second adapter 11, i.e., the joining (connection) of the water pipe unit, may be made, for example, via a hose as shown in FIG. 2, or, as shown in FIG. 3, the first adapter 10 shown in FIG. 3(a) and the second adapter 11 shown in FIG. 3(b) may be directly screwed together without using a hose.

The tap water supply pipe is screwed together with the first adapter 10 and/or the second adapter 11 using a joint nut to secure the joint. For example, a female thread is formed on each end of the cut water pipe to screw into the first adapter 10 and/or the second adapter 11, and the other male thread is cut long so that the shorter male thread is screwed into the water pipe joint to its full length. The length of the longer female thread is adjusted to the length that screws into the water pipe joint, so that the first adapter 10 and the second adapter 11 that make up this water pipe header pipe can be adjusted to fit between the water pipes.

In this way, in order to make a screw connection, one of the pipes to be screwed must be threaded with a male thread and the other pipe must be threaded with a female thread. This does not cause any problems when installing the header pipe supply system for fine bubble water, for example, when constructing a new house. However, when installing the header pipe supply system for fine bubble water in an existing house, it may be necessary to remove a wide area of flooring or wall materials. In such cases, it is possible to use a removable connection member, for example, as shown in Figure 4. Such removable water pipe and water hose joint members are widely known as water supply joints that connect a washing machine hose to a water faucet with a single touch, and are known not only to those skilled in the art but also to the general public, so the mechanism of the joint will not be described here.

In addition, in this header pipe supply system, as described above, the tap water outlets of the first adapter 10 and the second adapters 11a and 11b are connected or coupled to the fine bubble water generators 12, 13a-13e, respectively. However, as in the case of the connection between the first adapter 10 and the second adapter 11, this may be a screw connection in which one pipe is threaded with a male thread and the other pipe is threaded with a female thread, or a detachable joint connection as described above.

In this way, the water inlet side (side 52A shown in FIG. 5) of the fine bubble water generators 12, 13a-13e is connected to the tap water output ports of the first adapter 10 and the second adapters 11a, 11b, while the water outlet side (side 52B shown in FIG. 5) of the fine bubble water generators 12, 13a-13e is connected to a hose 14 (FIG. 14) for directing tap water (cold water and/or hot water) to a location where it is used, such as a water heater, kitchen (sink), bath, washroom, toilet, washing machine, etc., as shown in FIG. 2.

In this header pipe supply system, the first adapter 10 and the second adapter 11 are formed from metal pipes made of brass or stainless steel, as these are highly durable and have excellent water leakage prevention performance, and the branch water supply holes of the first adapter 10 and the second adapter 11 and the water inlet sides of the fine bubble water generators 12, 13a-13e are preferably connected by a screw-type connection means as described above in order to be sturdy and prevent water leakage. However, the hose 14 (Figure 14) for connecting the water outlet side of the fine bubble water generators 12, 13a-13e to the points where tap water (cold water and/or hot water) is used, such as the water heater, kitchen (sink), bath, washroom, toilet, washing machine, etc., may be a detachable connection that does not cause water leakage.

The hose 14 from the micro-bubble water generators 12, 13a-13e is preferably made of a flexible material that supplies tap water individually to each tap water demand point. This is because it is easy to install the micro-bubble water generators 12, 13a-13e at each tap water demand point, and because the hose 14 is flexible, it is more durable than a tap water supply path made of a metal conduit as shown in Figure 10, even if an earthquake or other event occurs and vibrations or distortions occur in the tap water supply path.

Here, the flexible hose 14 used in this header pipe supply system is preferably made of, for example, polybutene or cross-linked polyethylene. The inventors' experiments and tests have confirmed that, compared to polyvinyl chloride materials and the like, these hoses are not only more flexible, but also more waterproof and durable.

Next, examples of fine bubble water generators 12, 13a-13e used in the header pipe supply system of the present invention will be described with reference to Figures 5 to 9. Note that the generators are not limited to the type used in this header pipe supply system.

FIG. 5 shows a side cross-sectional view of an example of a fine bubble water generator 12, 13a-13e used in this header pipe supply system for fine bubble water, which is placed midway along a water supply pipe 2 that leads water from a water distribution pipe, an elevated water tank, etc. to a faucet.

The fine bubble water generators 12, 13a-13e are configured by disposing a cylindrical nozzle 56 inside a cylindrical body 53. The cylindrical body 53 is made up of a first cylindrical portion 54 and a second cylindrical portion 55 having different cross-sectional diameters, and the first cylindrical portion 54, which has a smaller diameter, has a male thread portion 54a on its outer periphery and is inserted into the upstream pipe portion 52A of the water supply pipe 52 and connected by screwing.

The second cylindrical section 55, which has a larger diameter, has a female thread 55a on its inner circumference and is connected by screwing to the tip of the downstream pipe section 52B of the water supply pipe 52 to be inserted. An annular rubber packing 57 is fitted to the outer circumference of the first cylindrical section 54, and when the first cylindrical section 54 is inserted into the water supply pipe 52, the annular end face of the upstream pipe section 52A comes into contact with the end face of the second cylindrical section 54 via the rubber packing 57.

The nozzle 56 has an outer diameter approximately equal to the inner diameter of the first cylindrical portion 54, and is held in the cylinder 53 with a portion of the nozzle 56 inserted into the first cylindrical portion 54. The inside of the nozzle 56 is provided with a water passage portion 58 that narrows from both the left and right ends toward the center. That is, the water passage portion 58 has a neck portion 59 at its center, where the cross-sectional diameter is smallest, and is hollowed out in an approximately conical shape so that the diameter increases as it extends from the neck portion 59 to the left and right.

The water passage section 58 is therefore composed of a first water passage 58a, the diameter of which gradually decreases along the direction in which the tap water flows, and a second water passage 58b, which is connected to the outlet side of the first water passage 58a and the diameter of which gradually increases along the direction in which the tap water flows.

The maximum diameter of the first water passage 58a, which is the inlet side of the nozzle 56, is preferably larger than the maximum diameter of the second water passage 58b, which is the outlet side, but they may be the same size or the inlet may be narrower.

The water intake section 60 is made of a circular thick plate and is located inside the cylinder 53 at the inlet side of the first water passage 58a of the nozzle 56. In this example, the water intake section 60 has four circular water intake holes 61 drilled in a circle at equal intervals on a plane and penetrating in the axial direction. Up to eight water intake holes 61 can be provided depending on the flow rate of the tap water piping to be installed. Therefore, when the number of water intake holes 61 is large, it is preferable to arrange them uniformly on the plane of the water intake section 60 rather than arranging them at equal intervals on a circle.

FIG. 6 shows the fine bubble water generators 12, 13a-13e, in which (a) is a perspective view of the outer appearance from the upstream side, and (b) is a perspective view of the outer appearance from the downstream side.

As shown in the side view of Figure 7(b), the water intake hole 61 is arranged so that its central axis in the depth direction is inclined relative to the axis of the water supply pipe 62. Therefore, since each water intake hole 61 has an oblique cylindrical shape, tap water passing through the water intake hole 61 is discharged in a direction inclined from the axis of the water intake section 60, and a twist is added to the water flow from the upstream pipe section 52A, resulting in a swirling flow that is discharged from the water intake section 60. Note that only one of the water intake holes 61 is shown as a representative example in Figure 7(b).

At this time, each water intake hole 61 is inclined so that the tap water is discharged toward the adjacent water intake hole 61 while swirling counterclockwise in FIG. 7(c). Therefore, the tap water passing through each water intake section 60 becomes a swirling flow twisted in the same direction as shown by the arrow in FIG. 7(a), and is introduced into the first water passage 58a of the nozzle 54.

Furthermore, as shown in FIG. 7(b), by making the inner wall surface of the water intake hole 61 an uneven surface 61a, the tap water is released from the water intake hole 61 while increasing the degree of turbulence. In this example, as shown in FIG. 7(b), a large number of protrusions are provided to form the uneven surface 61a. By increasing the degree of turbulence in this way, it becomes easier to extract the dissolved air in the tap water, and cavitation bubbles can be effectively generated within the nozzle 54.

The tap water discharged from each water intake hole 61 in a swirling flow strikes the inner wall of the first water passage 58a at an angle, and proceeds toward the neck 59 while swirling in a spiral as shown in Figure 8. Since the first water passage 58a has a narrowing structure in which the water passage diameter gradually narrows, the water speed increases as it approaches the neck 59, and is discharged from the neck 59 into the second water passage 58b.

The tap water, the flow rate of which has been increased in this way, is blown out from the neck 59 at high pressure and diffused in the second water passage 58b. This causes a sudden drop in pressure, and countless fine cavitation bubbles are generated in the tap water due to the boiling phenomenon, and are discharged into the downstream pipe 52B. Generally, the lower limit of the water pressure of tap water supplied to ordinary homes from the waterworks bureau is 1.5 kgf/ ^cm2 to 3 kgf/ ^cm2 (0.15 MPa 0.3), and the nozzle 56 uses only this water pressure to turn the air contained in the tap water into fine bubble water containing an extremely large number of bubbles that have been finely divided by cavitation. The ideal water pressure in this case is 2.0 to 4.0 kgf/ ^cm2 (0.2 to 0.39 MPa).

In the above embodiment, the maximum diameter of the first water passage 58a is larger than the maximum diameter of the second water passage 58b, but they may be configured with the same diameter and symmetrical shapes centered on the neck 59. Also, the horizontal dimensions from the neck 59 to each maximum diameter part may be different. In short, it is sufficient if the appropriate amount and quality of cavitation bubbles as fine bubbles can be generated in relation to the pressure of the tap water blown out of the first water passage 58a and the pressure reduction due to diffusion in the second water passage 58b.

As shown in Figure 9, the shape of the water intake hole 61 from the inlet side to the outlet side is preferably not an oblique cylinder, but rather has a bent part in the middle. This causes a twist in the flow of tap water passing through the water intake hole 61, which, together with the uneven surface 61a of the inner wall of the water intake hole 61, further increases the degree of turbulence, improving the generation of cavitation bubbles within the nozzle 61.

The micro-bubble water generators 12, 13a-13e are directly connected to the water supply supplied to ordinary households, and the air contained in the tap water is converted into microbubbles by cavitation using only the pressure of the tap water. The micro-bubble water generators 12, 13a-13e are placed downstream of the water meter, and the piping distance from the micro-bubble water generators 12, 13a-13e to a washing machine or the like that uses the micro-bubble water is about 15 meters on average. In this case, since it is impossible to visually check the microbubbles, the inventors of the present application confirmed that microbubbles were formed even at the end of a 20-meter-long pipe by using a laser pointer in a dark place to point a laser at the water to be treated and detecting the reflected light from the bubbles.

To generate microbubbles more efficiently, it is advisable to arrange multiple nozzles 56 in series inside the second cylindrical portion 55, with the second water passage 58b of the nozzle 56 in the front stage connected to the first water passage 58a of the nozzle 56 in the rear stage, to create a configuration in which cavitation is repeatedly generated.

As described above, the present invention has been made in consideration of the problem that, in the past, a fine bubble water generator was installed at each point where tap water is used (shower, washing machine, warm water washing toilet seat, etc.) in order to generate water containing a large number of bubbles with diameters of micrometers or nanometers in tap water (cold water) or hot water. The present invention can be easily installed near the base of the main supply pipe for cold water and/or hot water in a water supply system of a house, etc., so that all tap water cold water and hot water supplied within the house can be generated into fine bubble water and supplied.

The header pipe supply system for fine bubble water according to the present invention is configured so that the fine bubble water generators 12, 13a-13e are placed inside a joint that is assembled by fastening the first adapter 10 and the second adapter 11 with a connecting nut, so that it can be easily installed in the middle of the water supply pipe.

The notable technical feature of this invention is that the header pipes 100, 101 for the fine bubble water are located near the receiving point of maximum water pressure where water is supplied from the waterworks, making it possible for the fine bubble water to contain more micrometer-sized bubbles, and to supply the fine bubble water to all water-using points in the home.

100 Cold water pipe connection unit 101 Hot water pipe connection unit 10 First adapters 11a, 11b constituting the water pipe connection unit Second adapters 12, 13a-13e constituting the water pipe connection unit Micro-bubble water generator 58a First water passage 58b of the micro-bubble water generator Second water passage 60 of the micro-bubble water generator Water intake section 61 of the micro-bubble water generator Water intake hole 61a of the micro-bubble water generator Uneven surface of the micro-bubble water generator

Claims (8)

A header pipe having a plurality of branch water supply holes for receiving tap water supplied from a tap water main pipe via a water meter and branching the water to a plurality of tap water demand locations;
A plurality of micro-bubble water generators connected to the plurality of branch water supply holes, respectively , for micronizing air bubbles contained in the tap water;
and a fine bubble water generating hose connected to each of the water outlets of the fine bubble water generator, for individually supplying fine bubble water to a plurality of tap water demand points without branching along the way.
the header pipe is formed of a metal pipe made of brass or stainless steel, and each of the branch water supply holes is provided with a connection means for screwing into the fine bubble water generator;
The fine bubble water generating hose is made of a flexible material that supplies the fine bubble water supplied from the water outlet of the fine bubble water generator to each of the plurality of tap water demand points individually without any seams along the way.
A header pipe supply system for fine bubble water. a header pipe including a first adapter having a branch water supply hole for a water heater for receiving tap water supplied from a tap water main pipe via a water meter and supplying the water to a water heater , and a second adapter having a plurality of branch water supply holes for branching the tap water supplied via the first adapter to a plurality of tap water demand points ;
A plurality of fine bubble water generators connected to the water heater branch water supply hole and the plurality of branch water supply holes, respectively , for finely reducing bubbles contained in tap water;
and a fine bubble water generating hose connected to each of the water outlets of the fine bubble water generator and supplying fine bubble water to the water heater and the plurality of tap water demand points individually without branching along the way.
The header pipe is formed of a metal pipe made of brass or stainless steel, and the water heater branch water supply hole and the branch water supply hole are provided with a connection means for screwing onto the fine bubble water generator,
The fine bubble water generating hose is made of a flexible material that supplies the fine bubble water supplied from the water outlet of the fine bubble water generator to the water heater and each of the multiple tap water demand points individually without any seams along the way.
A header pipe supply system for fine bubble water. 3. The header pipe supply system for fine bubble water according to claim 2, wherein the first adaptor and the second adaptor are connected by screwing a hose made of a flexible material or a metal pipe . The fine bubble water generator comprises:
A water intake plate having a plurality of water intake holes for taking in tap water from the water heater branch water supply hole or the branch water supply hole;
A fine bubble water generating nozzle arranged downstream of the water intake plate ;
It is composed of
The fine bubble water generating nozzle is
A first water passage whose diameter gradually decreases along the direction in which tap water flows;
a second water passage provided in communication with an outlet side of the first water passage and having a diameter gradually increasing along a direction in which tap water flows;
a throttle portion connecting the first water passage and the second water passage;
Characterized in that it has
4. A header pipe supply system for fine bubble water according to claim 1. 5. The header pipe fine bubble water generator for fine bubble water according to claim 4 , wherein the central axes of the plurality of water intake holes from the inlet side to the outlet side are inclined with respect to the central axis of the water intake plate. 6. The header pipe supply system for fine bubble water according to claim 5 , wherein the plurality of water intake holes are provided at equal intervals in a circular shape at positions spaced a predetermined distance from a central axis of the water intake plate . 7. The header pipe supply system for fine bubble water according to claim 6 , wherein an inner surface of the water intake hole is formed with an uneven surface for generating turbulent flow. 8. The water pipe header pipe fine bubble water generator according to claim 7 , wherein the water intake hole is formed to be bent from the water inlet side toward the water outlet side.

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