JP2007301281A - Fine bubble generator and hot-water supply apparatus for bath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fine bubble generator and a hot-water supply apparatus for a bath reducing an initial cost and a running cost and being hardly restricted by installation environment. <P>SOLUTION: This hot-water supply apparatus for the bath having the fine bubble generator 10 for supplying warm water including fine bubbles to a bathtub is so formed that the fine bubble generator 10 has a gas-liquid dissolution tank 20, a water supply line 31a, a fluid nozzle 21, a decompression nozzle 22, and a first fluid cutoff valve 13; tap water is supplied from the water supply line 31a to the gas-liquid dissolution tank 20 filled with gas and closed by the first fluid cutoff valve 13 via the fluid nozzle 21 and, a prescribed time later, the water supply line 31a is opened to allow the passing of water through the decompression nozzle 22, so that the warm water including the fine bubbles is supplied to the bathtub 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fine bubble generating device for generating fine bubbles and a hot water supply device for a bath provided with the same.

Traditionally, it has been known to produce fine bubbles in the bathtub to make it whiter and enhance the feeling of bathing. Baths equipped with such facilities are used in facilities such as public baths and hot springs. Yes.
In recent years, the effect has been scientifically confirmed, and the number of cases employed in home tubs is increasing.
The principle of generating fine bubbles in the liquid is to create a gas-liquid dissolution fluid by pressure-dissolving the gas in the liquid and releasing the pressure with the decompression nozzle. It is generated as bubbles.

Patent Documents 1 and 2 also disclose inventions related to devices that generate such fine bubbles.
In FIG. 13, the block diagram of the bathtub system of patent document 1 is shown.
The bathtub 110 is provided with a bath water outlet 111 and a return port 112, and the outlet 111 and the return port 112 are provided with a circulation passage 121 connected to the fine bubble generator 120.
A circulation pump 122 is disposed in the circulation passage 121, and a gas-liquid mixing tank 123 is provided downstream of the circulation pump 122.
An injection nozzle 126 and an air valve 127 for opening the gas-liquid mixing tank 123 to the atmosphere are provided on the ceiling surface of the gas-liquid mixing tank 123. The air valve 127 and the circulation pump 122 are electrically connected to a controller 124 for controlling them.

The return port 112 is provided with an ejection nozzle 125, and the ejection nozzle 125 is provided with a pressure reducing body having a diameter smaller than the diameter of the ejection nozzle 126.
The microbubble generator 120 configured as described above operates the circulation pump 122 to circulate the bathtub water stored in the bathtub 110 from the outlet 111 through the circulation passage 121, and from the injection nozzle 126 to the gas-liquid. Bath water is spouted toward the inside of the mixing tank 123.
Since the gas-liquid mixing tank 123 is filled with gas and liquid, the bath water ejected from the injection nozzle 126 strikes the water surface in the gas-liquid mixing tank 123 vigorously, and the gas-liquid mixing tank entrains air. Bath water is supplied to 123.
At this time, since the ejection nozzle 125 includes a decompression body having a smaller diameter than the ejection nozzle 126, the pressure in the gas-liquid mixing tank 123 is high, and the gas entrained in the liquid in the gas-liquid mixing tank 123 Dissolves in the liquid and becomes a gas-liquid dissolving fluid.
And when this gas-liquid melt | dissolution fluid is ejected in the bathtub from the ejection nozzle 125, a pressure will be open | released and a fine bubble will generate | occur | produce in a bathtub.

Patent Document 2 also describes an invention relating to a fine bubble generating nozzle having a simple structure having the same function.
FIG. 14 shows the fine bubble generating nozzle of Patent Document 2.
A gas-liquid dissolution tank 204 equipped with an ejector 206 is provided at a faucet 202 of a water pipe 201 provided with a water stop cock 203.
A spray nozzle 205 is provided at the tip of the ejector 206, and an air vent valve 208 and a pressure reducing valve 209 are provided in the gas-liquid dissolution tank 204.
As described above, the air taken in by the ejector 206 into the tap water supplied from the water pipe 201 is discharged from the spray nozzle 205 by the configured fine bubble generating nozzle 211, thereby causing the inside of the gas-liquid dissolution tank 204. And is converted into tap water containing fine bubbles by the pressure reducing valve 209 and discharged.
Excess air in the gas-liquid dissolution tank 204 is discharged by the air vent valve 208.
JP 2001-170618 A Japanese Patent Laying-Open No. 2005-205326

However, the prior art has the following problems.
(1) Since the piping for the fine bubble generator is installed separately from the bath remedy piping, the cost is high.
In the invention described in Patent Document 1, a fine bubble generator is installed in a pipe that circulates bathtub water.
Therefore, in order to attach the fine bubble generating device of Patent Document 1 to existing equipment, a large-scale piping work is required in which the fine bubble generating device is attached in the middle of the piping and the injection nozzle 126 is provided at the return port 112 of the bathtub 110. Become. In some cases, it is considered that the bathtub 110 needs to be replaced, and a construction for inserting the gas-liquid mixing tank 123 into the hot water supply side piping is necessary.

(2) Since a nozzle is attached to the tip of the faucet, it is difficult to use.
In the invention described in Patent Document 2, since the fine bubble generating nozzle 211 is installed in the faucet 202 of the water pipe 201, it may be difficult for the user to use the faucet 202.
The size of the fine bubble generating nozzle 211 is not described in Patent Document 2, but in order to efficiently generate fine bubbles by entraining air in tap water sprayed from the spray nozzle 205, the gas-liquid dissolution tank 204 is used. A certain length is required.
This is because convection occurs in the gas-liquid dissolution tank 204 and the gas-liquid dissolution tank 204 needs to be long enough to absorb the momentum of tap water ejected from the spray nozzle 205. If the gas-liquid dissolution tank 204 is shortened, it is considered that air reaches the pressure reducing valve 209 without mixing air with tap water ejected from the spray nozzle 205, and fine bubbles cannot be produced effectively.

Therefore, the fine bubble generating nozzle 211 is inevitably long, and when attached to the faucet 202, the fine bubble generating nozzle 211 extending long downward from the tip of the faucet 202 becomes an obstacle, so that the usability is poor.
Usually, the height of the kitchen faucet 202 or the faucet 202 provided in the bath is made on the premise that nothing can be attached to the tip.
Therefore, it is inconvenient that the fine bubble generating nozzle 211 may collide with the sink in the kitchen and the edge of the bathtub in the bath.
Even if it does not collide, it is expected that the fine bubble generating nozzle 211 is attached to the faucet 202, which makes it difficult to use.
Therefore, in the nozzle of patent document 2, the faucet which can be attached is limited and it is assumed that it is inconvenient to use.

  As described above, the conventional methods of Patent Literature 1 and Patent Literature 3 have problems such as (1) initial cost for installation of equipment and (2) limited installation environment.

  Accordingly, the present invention has been made to solve such a problem, and provides a fine bubble generating device and a hot water supply device for a bath that can reduce initial costs and running costs and are less susceptible to restrictions on the installation environment. With the goal.

In order to achieve the above object, the fine bubble generating device and the hot water supply device for a bath according to the present invention have the following characteristics.
(1) In a hot water supply device for a bath provided with a fine bubble generator for supplying hot water containing fine bubbles to a bathtub,
The fine bubble generator includes a gas-liquid dissolution tank for dissolving a gas in a liquid, a water supply port for supplying tap water to the gas-liquid dissolution tank, and a plurality of small bubbles provided above the gas-liquid dissolution tank. A fluid nozzle having a hole, a decompression nozzle provided in a lower flow path of the gas-liquid dissolution tank, and a flow path provided in a lower part of the gas-liquid dissolution tank and connected to the gas-liquid dissolution tank are blocked. A fluid shut-off means that communicates,
The tap water is supplied from the water supply port through the fluid nozzle to the gas-liquid dissolution tank filled with gas and closed by the fluid blocking means, and after a predetermined time, the fluid blocking means is opened, The hot water containing the said microbubble is supplied to the said bathtub by passing a pressure reduction nozzle, It is characterized by the above-mentioned.

(2) In the hot water supply device for a bath described in (1),
The fine bubble generating device includes an intake port for supplying gas to the gas-liquid dissolution tank, a flow path provided at an upper portion of the gas-liquid dissolution tank, and connected to the gas-liquid dissolution tank from the intake port; A flow path switching means for switching the flow path connected to the gas-liquid dissolution tank from the water supply port, and a controller for controlling the flow path switching means and the fluid blocking means,
The controller is
(A) The flow path switching means is controlled to communicate with the gas-liquid dissolution tank from the intake port, and the fluid blocking means is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank, Gas filling means for filling the gas-liquid dissolution tank with gas from the intake port;
(B) The flow path switching unit is controlled to communicate with the gas-liquid dissolution tank from the water supply port, the fluid blocking unit is blocked, and the tap water is supplied from the water supply port to the gas-liquid dissolution tank. And pressurizing and dissolving means for increasing the internal pressure of the gas-liquid dissolving tank with the water pressure of the tap water,
(C) The flow path switching means is connected to the gas-liquid dissolution tank from the water supply port, and the fluid blocking means is opened so that the fine bubble generating means for allowing the fluid to pass through the pressure reducing nozzle is provided. And
The gas filling unit, the pressure dissolving unit, and the fine bubble generating unit are sequentially switched.

(3) In the hot water supply device for a bath described in (1) or (2),
The pressure reducing nozzle includes an input part, an orifice part, and an output part, and is formed in a cylindrical flow path in a horizontal direction, and the input part is perpendicular to the flow direction of the cylindrical flow path. A narrow tube is connected, the diameter of the orifice is narrowed conically from the input part to the orifice part, and the orifice part has a diameter so that an opening area is narrower than a total area of the plurality of small holes of the fluid nozzle. The output portion is provided with a conical surface extending in a conical shape from the orifice portion to the output portion, and a conical wall surface provided with a plurality of discharge holes via a gap, and a porous surface downstream of the discharge holes. The body is provided,
By supplying the tap water from the gas-liquid dissolution tank to the narrow tube, the tap water creates a spiral flow along the normal direction of the outer peripheral portion of the input portion, and is guided to the orifice portion, and the gap It passes through the discharge hole and the porous body through a gap.

(4) In a fine bubble generator for supplying tap water containing fine bubbles to a bathtub,
A gas-liquid dissolution tank for dissolving gas in the liquid, an intake port for supplying gas to the gas-liquid dissolution tank, a water supply port for supplying the tap water to the gas-liquid dissolution tank, and the gas-liquid A flow path switching means for switching between a flow path connected to the gas-liquid dissolution tank from the intake port and a flow path connected to the gas-liquid dissolution tank from the water inlet; A fluid nozzle formed on the upper surface of the gas-liquid dissolution tank and having a plurality of small holes; a pressure-reduction nozzle provided in a flow path connected to the lower surface of the gas-liquid dissolution tank and having a smaller diameter than the fluid nozzle; With
The gas-liquid dissolution tank filled with gas from the intake port is connected to the gas-liquid dissolution tank from the water supply port through a flow path connected from the intake port to the gas-liquid dissolution tank by the flow path switching means. By switching to the flow path, the tap water is supplied from the water supply port via the fluid nozzle, and the tap water passes through the pressure reducing nozzle, whereby fine bubble water containing the fine bubbles is added to the tap water. It supplies to the said bathtub, It is characterized by the above-mentioned.

(5) A hot water supply device for a bath comprising the fine bubble generating device described in (4).

The following operations and effects can be obtained by the fine bubble generating device and the hot water supply device for a bath according to the present invention having such characteristics.
(1) In a hot water supply apparatus for a bath provided with a fine bubble generator for supplying hot water containing fine bubbles to a bathtub, the fine bubble generator includes a gas-liquid dissolution tank, a water supply port, a fluid nozzle, a decompression nozzle, And tap water is supplied from a water supply port through a fluid nozzle to a gas-liquid dissolution tank that is filled with gas and closed by the fluid shut-off means. After a predetermined time, the fluid shut-off means is opened. Since the hot water containing fine bubbles is supplied to the bathtub by passing through the decompression nozzle, it is possible to generate fine bubbles with a simple structure, reducing the initial cost and making the device itself compact. Since it can, it becomes difficult to limit the environment where it can be attached.

In other words, since it has a compact bubble generator in the hot water supply device for the bath, if you want to add the fine bubble generator to the existing bath equipment, replace the hot water supply device for the bath, It becomes possible to add a fine bubble generating function.
Accordingly, it is not necessary to attach a disturbing adapter to the faucet or the like, and it becomes possible to supply hot water containing fine bubbles to the bathtub by operating the hot water supply device for the bath.
In addition, the structure is simple and it is composed of inexpensive parts, so the cost is low, and since the pressure of tap water is used, it is not necessary to increase the capacity of the circulation pump, and it can be installed simply by replacing the hot water supply device for the bath. Since the construction is completed, it is not necessary to construct a new pipe for generating fine bubbles, and the initial cost can be reduced.

(2) In the hot water supply device for a bath described in (1),
A microbubble generator is provided at the top of the gas-liquid dissolution tank for supplying gas to the gas-liquid dissolution tank, a flow path connecting from the intake port to the gas-liquid dissolution tank, and a gas-liquid from the water supply port A flow path switching means for switching between the flow paths connected to the dissolution tank, and a controller for controlling the flow path switching means and the fluid blocking means,
The controller
(A) The flow path switching means is controlled to communicate with the gas-liquid dissolution tank from the intake port, and the fluid blocking means is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank. Gas filling means for filling the liquid dissolution tank with gas;
(B) The flow path switching means is controlled so as to communicate with the gas-liquid dissolution tank from the water supply port, the fluid blocking means is shut off, tap water is supplied from the water supply port to the gas-liquid dissolution tank, and the water pressure of the tap water A pressure dissolution means for increasing the internal pressure of the gas-liquid dissolution tank,
(C) The flow path switching unit includes a fine bubble generating unit that allows the fluid to pass through the pressure reducing nozzle by opening the fluid blocking unit while communicating with the gas-liquid dissolution tank from the water supply port. And the pressurizing and dissolving means and the fine bubble generating means are sequentially switched, and the same effect as (1) can be obtained without providing a complicated mechanism.

(3) In the hot water supply device for a bath described in (1) or (2),
The pressure reducing nozzle is composed of an input part, an orifice part, and an output part, and is formed in a horizontal direction in a cylindrical flow path. In the input part, a thin tube is perpendicular to the flow direction of the cylindrical flow path. Connected, the diameter is narrowed conically from the input part to the orifice part, and the orifice part is narrowed so that the opening area becomes narrower than the total area of the plurality of small holes of the fluid nozzle, and the output part Is provided with a conical wall surface provided with a plurality of discharge holes, with a surface extending in a conical shape from the orifice part to the output part, and a gap, and a porous body is provided downstream of the discharge holes,
When tap water is supplied from the gas-liquid dissolution tank to the narrow tube, the tap water creates a spiral flow along the normal direction of the outer peripheral portion of the input section, is guided to the orifice section, and the discharge hole and Since it is characterized by passing through the porous body, it is possible to enhance the effect under specific conditions of the pressure reducing nozzle of the fine bubble generating device provided in the hot water supply device for bath (1) or (2).

When the pressure reducing nozzle of the fine bubble generator included in the bath water heater of (1) or (2) described above needs to be installed horizontally in relation to the internal layout of the bath water heater, large bubbles were likely to be generated. .
Therefore, when the pressure reducing nozzle is installed in the horizontal direction, the tap water is installed in a direction perpendicular to the flow direction of the cylindrical flow path as described above, so that the tap water flows against the flow at the outer periphery of the input unit. By creating a vortex flow in the vertical direction, there is an effect of suppressing the generation of large bubbles when passing through the vacuum nozzle.
If large bubbles do not occur at the decompression nozzle, bubbles do not decrease when the bubbles grow in the subsequent piping and reach the bathtub, which contributes to enhancing the feeling of bathing.
Moreover, since a complicated mechanism is not required, the initial cost is not increased unnecessarily.

(4) In a fine bubble generator for supplying tap water containing fine bubbles to a bathtub,
A gas-liquid dissolution tank, an intake port, a water supply port, a flow path connected to the gas-liquid dissolution tank from the intake port, and a flow path connected from the water supply port to the gas-liquid dissolution tank. And a flow path switching means for switching between, a fluid nozzle formed on the upper surface of the gas-liquid dissolution tank, having a plurality of small holes, and a flow path connected to the lower surface of the gas-liquid dissolution tank, from the fluid nozzle A pressure reducing nozzle with a narrowed diameter,
By switching from a flow path connecting from the intake port to the gas-liquid dissolution tank to a gas-liquid dissolution tank filled with gas from the intake port to a flow path connecting from the water supply port to the gas-liquid dissolution tank, Since tap water is supplied from the water supply port through the fluid nozzle, and the tap water passes through the decompression nozzle, the fine bubble water containing fine bubbles in the tap water is supplied to the bathtub. (1) It becomes possible to install a fine bubble generating apparatus separately from the hot water supply apparatus for a bath thru | or (3).

The fine bubble generator provided in the hot water supply device for bath (1) described above includes fluid blocking means, and the fluid blocking means blocks and communicates to generate fine bubbles. Even if omitted, it is possible to easily generate fine bubbles.
In both the above (1) and (4), the gas is dissolved in the supplied tap water by supplying the tap water into the gas-liquid dissolution tank filled with the gas.
However, the amount of gas dissolved in tap water under atmospheric pressure is insufficient to generate fine bubbles. Therefore, in (1), the fluid blocking means is used to shut off the flow path downstream from the gas-liquid dissolution tank and supply tap water, whereby the pressure in the gas-liquid dissolution tank is increased by the tap water pressure. Rises and the gas is easily dissolved in the tap water. This is because the amount of dissolved gas in the liquid is proportional to the pressure.

However, this effect can also be realized by reducing the opening area of the decompression nozzle relative to the opening area of the fluid nozzle. This is because the internal pressure of the gas-liquid dissolution tank gradually increases unless the amount of tap water discharged from the gas-liquid dissolution tank is smaller than the amount of tap water supplied to the gas-liquid dissolution tank.
In either of the methods (1) and (4), the inside of the gas-liquid dissolution tank is pressurized until it becomes equal to the water pressure of tap water supplied from the supply port. As a result, the gas is dissolved in the tap water as described above, and the pressure of the tap water is lowered when passing through the vacuum nozzle, and the dissolved gas is released into the tap water.
As a result, tap water containing fine bubbles is supplied to the bathtub.

By adopting the configuration (4) as described above, it is possible to provide a microbubble generator at low cost. According to the configuration of (4), it is possible to generate fine bubbles by supplying tap water and switching the intake port and the water supply port by the flow path switching means. If the water supply port is switched, complicated control is not required, and a compact microbubble generator can be provided.
As a result, for example, it can be used as a simple microbubble generator connected to a pipe branched from a hot water tap in a bathroom, and microbubbles can be easily generated.

(5) Since it is a hot water supply device for baths provided with the fine bubble generator described in (4), the cost can be further reduced as compared with the hot water supply devices for baths of (1) to (3). Is possible.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, the configuration of the first embodiment will be described.
In FIG. 1, the block diagram of the microbubble generator of the invention which concerns on 1st Example is shown.
The fine bubble generating apparatus 10 includes a cylindrical fine bubble generator 11. A three-way electromagnetic switching an upper portion of the fine bubble generator 11 between a flow path communicating from the hot water supply line 31 b and a flow path communicating from the intake port 32 a. A valve 12 is connected.
In addition, a first fluid shut-off valve 13 is provided below the fine bubble generator 11.
The three-way solenoid valve 12 and the first fluid cutoff valve 13 are electrically connected to the controller 18 and controlled.

The configuration of the fine bubble generator 11 will be described with reference to FIG.
FIG. 2 is a diagram schematically showing a cross section of the fine bubble generator of the first embodiment.
The fine bubble generator 11 includes a gas-liquid dissolution tank 20, a fluid nozzle 21, and a decompression nozzle 22.
Below, each component which comprises the fine bubble generator 11 is demonstrated using figures.
FIG. 3 shows a cross-sectional view of the gas-liquid dissolution tank of the first embodiment.
First, the gas-liquid dissolution tank 20 is a cylindrical tank as shown in FIG. 3, and is made of a material that is resistant to corrosion and has a certain heat resistance, such as stainless steel. Moreover, since the gas-liquid dissolution tank 20 is slightly used in use, the gas-liquid dissolution tank 20 has a thickness of several millimeters. Of course, the required thickness varies depending on the material, and may be appropriately selected.

The size of the gas-liquid dissolution tank 20 varies depending on the use conditions, but the inner diameter b is preferably about 1/10 of the length a.
A fluid nozzle 21 is provided in the upper part of the gas-liquid dissolution tank 20, and a decompression nozzle 22 is provided in the lower part.
The decompression nozzle 22 may be integrally formed as a part of the gas-liquid dissolution tank 20, but is provided as a separate part in a part of the flow path connected to the gas-liquid dissolution tank 20. It doesn't matter. In this case, since the downstream of the gas-liquid dissolution tank 20 is a follow-up line 33b, if the decompression nozzle 22 is provided in the middle of the piping of the follow-up line 33b, the function is achieved.

FIG. 4A is a cross-sectional view of the fluid nozzle of the first embodiment attached to the gas-liquid dissolution tank, and shows an enlarged view of portion A of FIG. FIG. 4B shows a view from the lower surface of the fluid nozzle of the first embodiment.
The fluid nozzle 21 is joined to the gas-liquid dissolution tank 20 with a bolt structure or the like. Although the attachment structure is not particularly limited, it is possible that the tube is clogged, and therefore it is desirable that the attachment structure be detachable. Further, the gas-liquid dissolution tank 20 needs to be firmly fixed because the internal pressure is applied as described above. Although not shown in the figure, considering the later cleaning and replacement, a fixing method that can be removed without moving the piping, such as mounting the flange with the packing in between, is also effective.

A plurality of small holes 21 a are formed at the tip of the fluid nozzle 21. Further, the outside of the fluid nozzle 21 is a hexagon as shown in FIG. This is a hexagonal shape in consideration of assembly and removal because it employs a screw-in type, but there are various assembly methods such as the above-described flange mounting, and so on. It is not limited to the shape.
A plurality of small holes 21 a provided in the fluid nozzle 21 are provided so that water can be supplied in the form of a shower to the liquid level stored in the gas-liquid dissolution tank 20.

FIG. 5A shows a sectional view of the pressure reducing nozzle of the first embodiment, and FIG. 5B shows a lower surface of the pressure reducing nozzle of the first embodiment.
The decompression nozzle 22 is provided in the lower part of the gas-liquid dissolution tank 20. In the first embodiment, the gas-liquid dissolution tank 20 is provided integrally. However, even when the gas-liquid dissolution tank 20 is not provided integrally, the gas-liquid dissolution tank 20 is provided on the downstream side. It only has to be done.
As shown in FIG. 5A, the decompression nozzle 22 includes an orifice portion 22a, a conical portion 22b, a mesh 22c, and a discharge hole 22d.

The orifice portion 22a is sufficiently small with respect to the diameter of the pressure reducing nozzle 22, and it is desirable that the inner diameter of the orifice portion 22a is set to half or less of the inner diameter of the pressure reducing nozzle 22.
Further, the discharge hole 22d has a smaller inner diameter than the orifice portion 22a and is provided in a plurality in the conical portion 22b. As shown in FIG. 5B, eight discharge holes 22d are provided. However, the number of the discharge holes 22d is not particularly limited as long as the water flow is appropriately dispersed.
The mesh 22c corresponding to the porous body may be a porous body such as ceramics or sintered metal as long as the material has corrosion resistance and has a certain strength that can withstand pressure from the upstream side. A plurality of meshes made of metal are used. The roughness is about 250 mesh.

Such a fine bubble generator 11 composed of the gas-liquid dissolution tank 20, the fluid nozzle 21, and the decompression nozzle 22 is used by being incorporated into the hot water supply apparatus 30 for bath shown in FIG.
FIG. 6 shows a system configuration diagram of the hot water supply apparatus for a bath according to the first embodiment.
Moreover, the block diagram which connects the hot-water supply apparatus for baths to a bathtub is shown by FIG.
First, the description of FIG. 6 will be given. The bath water heater 30 includes a hot water heat exchanger 35 and a memorial heat exchanger 36, and is used for hot water supply to the bathtub 50 shown in FIG.
A water supply line 31a and a hot water supply line 31b are connected to the hot water supply heat exchanger 35, and a water pipe is connected to the water supply line 31a. The hot water supply line 31b is connected to the bathtub 50 or the hot water tap 55 so that hot water can be supplied.
On the other hand, a remedy return line 33a and a remedy return line 33b are connected to the remedy heat exchanging part 36. The remedy return line 33a is provided with the bath circulation pump 17, and the remedy return line 33b. In addition, it is connected to a bathtub 50 shown in FIG.

The bath water heater 30 of FIG. 6 includes the fine bubble generator 10, the intake port 32 a is disposed via the three-way solenoid valve 12, and the drain port 32 b is disposed via the first fluid shut-off valve 13. The microbubble generator 10 is connected.
The three-way solenoid valve 12, the first fluid shutoff valve 13, and the bath circulation pump 17 are connected to a controller 18, and the controller 18 can also be operated by a remote controller 19.
The water supply line 31a connected to the hot water supply heat exchanging unit 35 is connected to 31b via the hot water supply heat exchanger 35a, and is branched to the branch line 34 in the middle thereof. Then, after passing through the check valve 37 provided in the branch line 34, the fine bubble generator 10 and the remedy return line 33 a connected to the remedy heat exchanging part 36 are joined together, and the remedy heat exchanger It will be connected to the follow-up line 33b via 36a, and will be connected to the bathtub 50 shown in FIG.

In addition, a bypass line 38, a second fluid shut-off valve 38a, and a third fluid shut-off valve 38b are provided so that hot water can be supplied to the bathtub 50 from the tracking line 33b without using the fine bubble generating device 10. ing.
The second fluid cutoff valve 38a and the third fluid cutoff valve 38b are also connected to the controller 18 and can be arbitrarily controlled.
As illustrated in FIG. 7, the bath water heater 30 having such a configuration is connected to a bathtub 50 provided in the bathroom 60 via a hot water fitting 51 and also to a hot water tap 55.
The hot water supply fitting 51 is connected to a retrace line 33a and a follow-up line 33b, and the hot water supply tap 55 is connected to a hot water supply line 31b.

The operation of the first embodiment having the above configuration will be described below.
FIG. 8 is a schematic diagram showing the process of generating fine bubbles. FIG. 8A shows a process for gas filling operation, FIG. 8B shows a process for pressure dissolution operation, and FIG. 8C shows a process for microbubble generation operation. Yes.
First, in FIG. 8A, the three-way solenoid valve 12 provided at the upper part of the fine bubble generator 11 is switched so as to be connected to the fine bubble generator 11 from the intake port 32a, and the first provided at the lower part of the fine bubble generator 11. The controller 18 performs control so that the one-fluid shut-off valve 13 is opened.
By doing in this way, the gas-liquid dissolution tank 20 with which the inlet port 32a and the fine bubble generator 11 are equipped communicates, and it becomes possible to take in air from the outside.
In addition, since the gas-liquid dissolution tank 20 provided in the fine bubble generator 11 communicates with the water outlet 32b, when the liquid is accumulated in the gas-liquid dissolution tank 20, the liquid is discharged to the outside. Become. The gas-liquid dissolution tank 20 is filled with air.

Next, in FIG. 8B, the three-way solenoid valve 12 provided at the upper part of the fine bubble generator 11 is switched so as to be connected to the branch line 34, and the first fluid cutoff valve 13 provided at the lower part of the fine bubble generator 11. Shut off.
In the branch line 34, hot water in which the tap water supplied from the water supply line 31a is warmed by passing through the hot water supply heat exchanger 35 is branched to the branch line 34 while being supplied to the hot water supply line 31b. . Therefore, the hot water just made is supplied to the gas-liquid dissolution tank 20 of the fine bubble generator 11.
By the way, since the water supply line 31a is connected with the water tank, the pressure of about 0.2 MPa is applied like a general water supply. Accordingly, the hot water supplied to the gas-liquid dissolution tank 20 is also at a pressure of about 0.2 MPa, and even if the gas-liquid dissolution tank 20 is filled with air, the hot water is stored in the gas-liquid dissolution tank 20 by this pressure. It is supplied to the inside and supplied to the point where the pressure and the balance are balanced, and the supply stops.
If it is the size of the gas-liquid dissolution tank 20 used for the experiment, hot water is accumulated to about 1/3.

Since the hot water stored in the gas-liquid dissolution tank 20 passes through the fluid nozzle 21 shown in FIGS. 4A and 4B when supplied from the branch line 34, FIG. As shown in b), it becomes a shower and is supplied to the liquid surface while entraining the gas in the gas-liquid dissolution tank 20. Furthermore, since the inside of the gas-liquid dissolution tank 20 is in a pressurized state as described above, the air is likely to be dissolved into the hot water.
In FIG. 8C, the three-way solenoid valve 12 provided at the upper part of the fine bubble generator 11 is maintained so that the branch line 34 and the gas-liquid dissolution tank 20 communicate with each other. The first fluid cutoff valve 13 provided is opened.
By doing so, the liquid in the gas-liquid dissolution tank 20 passes through the decompression nozzle 22 provided in the lower part of the gas-liquid dissolution tank 20, and is supplied to the bathtub 50 through the water outlet 32b.
When passing through the pressure reducing nozzle 22, the pressurized hot water is depressurized. The gas dissolved in the hot water is released in a form visible to the hot water.

Thus, hot water containing fine bubbles can be supplied to the bathtub 50 at the time of hot water supply by providing the hot water generator 30 for bath with the fine bubble generator 10.
The fine bubble generating device 10 of the first embodiment has a hot water supply capability of about 8 L / min, and the time for generating the fine bubbles and whitening the hot water supplied to the bathtub 50 is so long as will be described later. Therefore, it is more reasonable to use for a use in which a certain amount of hot water is supplied to the bathtub 50 and bathed while supplying hot water containing fine bubbles to the bathtub 50 in the form of hot water.
Therefore, in the configuration shown in FIG. 6, when hot water is first stored in the bathtub 50, the tap water supplied from the water supply line 31a is heated by passing through the hot water supply heat exchanger 35a of the hot water supply heat exchange section 35. The three-way solenoid valve 12 is switched to the intake port 32a side, the second fluid shut-off valve 38a is communicated, the third fluid shut-off valve 38b is shut off, and the additional fluid is passed through the branch line 34. It flows into the recuperation line 33a, passes through the heat exchanging section 36 for replenishment, and is supplied to the bathtub 50 through the retrace line 33b.

When a certain amount of hot water is accumulated in the bathtub 50, the three-way solenoid valve is subjected to the above-described gas filling operation, pressure dissolution operation, and fine bubble generation operation shown in FIGS. 8 (a) to 8 (c). 12 is switched to the side where the branch line 34 and the fine bubble generating device 10 are communicated, the second fluid shut-off valve 38a is shut off, and the third fluid shut-off valve 38b is communicated to trace the hot water generated by the fine bubbles. It supplies to the bathtub 50 from the line 33b.
In this way, since the fine bubbles are supplied to the bathtub 50, the cloudy hot water can be enjoyed during bathing.

Here, a simple experiment was conducted on the first embodiment, and the result will be described.
First, the size of the gas-liquid dissolution tank 20 is as described above, and includes a fluid nozzle 21 and a decompression nozzle 22.
As shown in FIG. 3, the gas-liquid dissolution tank 20 has a length a of 600 mm and an inner diameter b of 55 mm. As described above, the inner diameter b is about 1/10 of the length a. This is because, when the length a is shortened, the entrained air is directly discharged from the decompression nozzle 22 before being dissolved in the liquid, which has an adverse effect on the air dissolution.

However, if the inner diameter b is further reduced, the white turbidity is decreased. Since it is considered that the liquid discharged from the fluid nozzle 21 is less likely to directly contact the liquid surface, the overall balance is considered to affect the generation of fine bubbles.
As shown in FIGS. 4 (a) and 4 (b), the fluid nozzle 21 has four fluid nozzles 21 having an inner diameter of φ13 mm and four small holes 21a of φ4 mm. As the number of small holes 21a increases, the white turbidity increases as the number of holes increases, but it is better that the number of small holes 21a is increased.
This seems to be related to the diameter of the small hole 21 a and the pressure of the fluid supplied to the fluid nozzle 21. Since the water pressure supplied to the fluid nozzle 21 uses tap water and is not so high as about 0.2 MPa, it is confirmed that the white turbidity can be highest when the small holes 21a are provided at four locations of the fluid nozzle 21. is doing.

As shown in FIGS. 5A and 5B, the pressure reducing nozzle 22 is provided with an orifice portion 22 a, a conical portion 22 b, a mesh 22 c, and a discharge hole 22 d, and a pipe on which the pressure reducing nozzle 22 is provided. The inner diameter of the orifice portion 22a was about φ7 mm, while the inner diameter of the portion was about φ20 mm.
In addition, the conical portion 22b located below the orifice portion 22a has such a shape in consideration of pressure loss, and is provided with discharge holes 22d having an inner diameter of φ3 mm at eight locations. A mesh 22c is provided below the discharge hole 22d.
The mesh 22c is attached by superposing three pieces of stainless mesh material having a roughness of about 250 mesh. Mesh roughness is related to bubble growth. When the number of meshes of the mesh 22c is increased, the white turbidity is improved. However, it is confirmed that almost no effect is obtained up to about 3 sheets, and large bubbles are generated.
In addition, about the gap of the orifice part 22a and the cone part 22b, it turned out that the gap space | interval is about 1 mm. By changing the gap interval, the pressure loss changes and the flow velocity changes. Increasing the gap interval and increasing the flow velocity can reduce the time for white turbidity. However, since a large amount of liquid flows, there is a problem that the bathtub 50 fills up quickly.

A simple experiment was performed by attaching the fine bubble generator 11 having the above configuration to the hot water supply device 30 for bath described above. The fine bubble generator 11 is not incorporated in the hot water supply device 30 for a bath, but is simply assembled by being attached to a tracking line 33b connected from the hot water supply device 30 for a bath. The result is considered slightly different from the case where it is incorporated into the pipe due to the difference in length and pressure of the pipe, but it can be expected to show the same tendency. Moreover, the capacity | capacitance of the bathtub 50 used for experiment is 180L, the hot water of 160L is stored in the bathtub 50, a hot water of 20L is made cloudy, and the cloudiness is verified.
In FIG. 9, the graph showing the relationship between white turbidity and driving | running time is shown.
The experiment shows the difference by changing the water pressure of the tap water supplied from the water supply line 31a, and shows the setting when the water pressure is set to 0.2 MPa and the water pressure is set to 0.15 MPa.
As a result, when the water pressure is set to 0.2 MPa, it can be seen that the white turbidity reaches 100 after 60 seconds from the start, and gradually turns transparent after maintaining the white turbidity 100 for about 190 seconds.
On the other hand, when the water pressure is set at 0.15 MPa, it takes about 180 seconds from the start and after the white turbidity 90 is exceeded, it gradually returns to transparent.

From this result, it is considered that the same effect can be expected even when the fine bubble generating device 10 is actually incorporated in the hot water supply device 30 for bath.
In both results, the white turbidity starts to decrease when standing for about 210 seconds from the start because the amount of hot water is 20 L. When the water pressure is set to 0.2 MPa, the water pressure is set to about 160 seconds and when the water pressure is set to 0.15 MPa. This is because the supply is stopped at 20L in about 170 seconds.
From this result, it can be seen that the white turbid state of the bathtub 50 can be maintained for about 4 to 5 minutes, and it is considered that the same effect can be obtained when the fine bubble generating device 10 is actually incorporated in the hot water supply device 30 for bath. It is done.
If necessary, the microbubble generator 10 is operated intermittently, and the hot water mixed with microbubbles in the bathtub 50 is controlled to repeat supply and stop. It is considered possible to extend the duration. As a result, it has been confirmed that the cloudiness state can be maintained up to about 10 minutes.
However, since the hot water supply device 30 for the bath of the first embodiment is premised on the case where hot water is supplied, the user's satisfaction is obtained by maintaining the effect for about 10 minutes after the hot water is supplied. I think that
Of course, some users may desire to soak in the bathtub 50 for a long time, but it is also possible to maintain a cloudy state by controlling the controller 18 so as to repeat hot water multiple times.

Since the invention of the first embodiment is configured and operates as described above, the following effects can be obtained.
The fine bubble generating device 10 connects the three-way solenoid valve 12, the first fluid shut-off valve 13, and the controller 18 to the fine bubble generator 11 including the gas-liquid dissolution tank 20, the fluid nozzle 21, and the decompression nozzle 22. Fine bubbles can be generated in the bathtub 50. Due to such a simple configuration, the initial cost can be reduced with few failures.
In addition, since the bath water heater 30 is relatively compact, the function of the fine bubble generator 10 can be added to existing facilities by replacing the bath water heater 30.
Although the fine bubble generating device 10 can be externally attached to the hot water supply device 30 for baths, it is provided, for example, in the lower part of the hot water supply device 30 for baths and at the falling part of the pipe because of wiring and the like. Therefore, the merit that it can be replaced with the hot water supply device 30 for a bath can be left as it is.
Moreover, since the fine bubble generator 10 of the first embodiment supplies tap water from the water supply line 31a and does not circulate the water in the bathtub 50 to generate fine bubbles, the fine bubble generator 11 is provided inside the fine bubble generator 11. It is hard to collect filth and can be expected to be used maintenance-free.

According to the fine bubble generating device and the hot water supply device for a bath of the first embodiment described above, the following excellent actions and effects can be obtained.
(1) In a hot water supply device for a bath provided with a fine bubble generator 10 for supplying hot water containing fine bubbles to a bathtub,
The fine bubble generator 10 includes a gas-liquid dissolution tank 20 for dissolving a gas in a liquid, a water supply line 31 a for supplying tap water to the gas-liquid dissolution tank 20, and a plurality of units provided above the gas-liquid dissolution tank 20. A fluid nozzle 21 having a small hole, a decompression nozzle 22 provided in a flow path below the gas-liquid dissolution tank 20, and a flow provided at the lower part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 A first fluid shut-off valve 13 that shuts off and communicates with the passage, and is supplied to the gas-liquid dissolution tank 20 filled with gas and closed by the first fluid shut-off valve 13 from the water supply line 31a through the fluid nozzle 21. Water is supplied, and after a predetermined time, the water supply line 31a is opened and the decompression nozzle 22 is passed to supply hot water including the fine bubble generating device 10 to the bathtub 50. Can be generated microbubbles, lowering the initial cost, attachable environment is less likely to be limited because it the bath hot water supply device 30 compactly.

In other words, since the small bubble generator 10 is provided in the bath hot water supply device 30 in a compact manner, when the fine bubble generator 10 is to be added to the existing bath facility, the hot water supply device 30 for the bath is replaced. By doing so, it becomes possible to add a function of generating fine bubbles.
Accordingly, it is not necessary to attach a disturbing adapter to the faucet or the like, and the hot water containing fine bubbles can be supplied to the bathtub 50 by operating the hot water supply device 30 for bath.
Furthermore, since the structure is simple and it is composed of inexpensive parts, the cost is low, and since the pressure of tap water is used, it is not necessary to increase the capacity of the bath circulation pump 17 and the bath water heater 30 is replaced. Since the installation work is completed only by this, the initial cost can be reduced.

(2) In the hot water supply device for a bath described in (1),
The fine bubble generating device 10 is provided with an intake port 32a for supplying gas to the gas-liquid dissolution tank 20, and a flow path provided at the upper part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 from the intake port 32a. A three-way solenoid valve 12 for switching between the flow path connected to the gas-liquid dissolution tank 20 from the water supply line 31a, and a controller 18 for controlling the three-way solenoid valve 12 and the first fluid shut-off valve 13.
The controller 18
(A) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the intake port 32a, and the first fluid shutoff valve 13 is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank 20. Gas filling means for filling the gas-liquid dissolution tank 20 with gas from the air inlet 32a;
(B) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the water supply line 31a, the first fluid shut-off valve 13 is shut off, and tap water is supplied to the gas-liquid dissolution tank 20 from the water supply line 31a. And pressurizing and dissolving means for increasing the internal pressure of the gas-liquid dissolving tank 20 with the water pressure of tap water,
(C) By opening the first fluid shut-off valve 13 with the three-way solenoid valve 12 communicating with the gas-liquid dissolution tank 20 from the water supply line 31a, the fine bubble generating means for allowing the fluid to pass through the decompression nozzle 22 And the gas filling means, the pressure dissolving means, and the fine bubble generating means are sequentially switched, so that the same effect as in (1) is obtained.

(Second embodiment)
Next, the configuration of the second embodiment will be described.
In the second embodiment, the configuration of the fine bubble generating device 10 is substantially the same as that of the first embodiment, and the connection of piping of the hot water supply device 30 for bath is different. Therefore, the configuration of the hot water supply apparatus 30 for bath will be described.
FIG. 10 shows a system configuration diagram of the hot water supply apparatus for a bath according to the second embodiment.
FIG. 10 corresponds to FIG. 6 of the first embodiment, and the position where the microbubble generator 10 is arranged is different. Note that description of the same function is omitted.
The difference from the first embodiment is that a second fluid shut-off valve 38a is first provided downstream of a check valve 37 provided in the branch line 34, and a remedy return line 33a is joined downstream thereof. It is.

In addition, the recuperation return line 33 a is provided with a fifth fluid shut-off valve 38 d at the inlet, and thereafter the bath circulation pump 17 is connected to the branch line 34.
In addition, the branch line 34 joins the remedy return line 33a, is connected to the remedy heat exchanger 36a included in the remedy heat exchanger 36, and is connected to the fine bubble generating device 10; Branches to a follow-up line 33b in which the fourth shut-off valve 38c is provided.
The bypass line 38 is connected to the three-way solenoid valve 12 from a branch point downstream of the heat exchanger 36a for remedy. The three-way solenoid valve 12 is connected to a pipe connected to the fine bubble generator 10 and an intake port 32a. Pipes to be connected are connected.
The microbubble generator 10 is connected downstream of the three-way solenoid valve 12, and then branches to a pipe connected to the first fluid cutoff valve 13 and a pipe connected to the third fluid cutoff valve 38b.
The first fluid shut-off valve 13 is connected to the water outlet 32b, and the third fluid shut-off valve 38b is connected to a pipe that merges with the tracking line 33b.

The operation of the second embodiment having the above-described configuration will be described below.
First, when supplying a certain amount of hot water to the empty bathtub 50, the tap water supplied from the water supply line 31a is warmed by the hot water supply heat exchanging unit 35, and the hot water supply tap 55 connected to the hot water supply line 31b is used. The hot water is supplied to the bathtub 50 by passing through the intake port 32a through the branch heat exchanger 36a through the branch line 34 branched from the hot water supply line 31b.
After a certain amount of hot water is supplied to the bathtub 50, the first fluid shut-off valve 13 and the fourth shut-off valve 38c are closed, and the three-way solenoid valve 12 is supplied from the remedy heat exchanger 36a to the fine bubble generating device 10. Switching is made so that the third fluid shut-off valve 38b is opened, and hot water mixed with fine bubbles is supplied from the follow-up line 33b to the bathtub 50.
At this time, it goes without saying that the fine bubble generator 10 has undergone the above-described processes of gas filling operation, pressure melting operation, and fine bubble generation operation.

In this way, since the fine bubbles are supplied to the bathtub 50, the cloudy hot water can be enjoyed during bathing.
When the supply to the bathtub 50 is finished, the hot water stored in the bathtub 50 gradually returns to transparent, but here, the bath water taken in from the remedy return line 33a is circulated by the bath circulation pump 17. The second fluid shut-off valve 38a, the fourth shut-off valve 38c and the first fluid shut-off valve 13 are shut off, and the three-way solenoid valve 12 is switched to communicate with the fine bubble generating device 10 from the memory heat exchanger 36a. By opening the three-fluid shut-off valve 38b, bath water mixed with fine bubbles can be supplied to the bath 50.
That is, the bath water taken in from the remedy return line 33a is passed through the fine bubble generator 10 and supplied to the tub 50 through the follow-up line 33b, thereby maintaining the white turbid state of the hot water in the tub 50. Is possible.
In this case, it is necessary to improve the capacity of the bath circulation pump 17 in order to secure the water pressure supplied to the fine bubble generating device 10, but since the bath circulation pump 17 is provided in the hot water supply device 30 for bath, Sex is not impaired.
In addition, since it is necessary to supply air into the gas-liquid dissolution tank 20 regularly, it is necessary to perform intermittent operation, but as shown in the first embodiment, the cloudiness state can be maintained for about 4 to 5 minutes. For this reason, it is possible to always maintain a cloudy state even in intermittent operation.

Since the invention of the second embodiment is configured and operates as described above, the following effects can be obtained.
In the second embodiment, since the configuration of the first embodiment is such that a change in piping and a fourth shut-off valve 38c and a fifth fluid shut-off valve 38d are added, the structure is the same as in the first embodiment. It is simple, there are few failures and the initial cost is low.
Moreover, since it is comparatively compact and can be incorporated in the hot water supply apparatus 30 for baths, the function of the fine bubble generating apparatus 10 can be added to existing facilities by replacing the hot water supply apparatus 30 for baths. Of course, the fine bubble generating device 10 can be externally attached to the hot water supply device 30 for the bath as in the first embodiment.

According to the fine bubble generator and the hot water supply device for the bath of the second embodiment described above, the following excellent actions and effects can be obtained.
(1) In a hot water supply device for a bath provided with a fine bubble generator 10 for supplying hot water containing fine bubbles to a bathtub,
The fine bubble generator 10 includes a gas-liquid dissolution tank 20 for dissolving a gas in a liquid, a water supply line 31 a for supplying tap water to the gas-liquid dissolution tank 20, and a plurality of units provided above the gas-liquid dissolution tank 20. A fluid nozzle 21 having a small hole, a decompression nozzle 22 provided in a flow path below the gas-liquid dissolution tank 20, and a flow provided at the lower part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 A first fluid shut-off valve 13 that shuts off and communicates with the passage, and is supplied to the gas-liquid dissolution tank 20 filled with gas and closed by the first fluid shut-off valve 13 from the water supply line 31a through the fluid nozzle 21. Water is supplied, and after a predetermined time, the water supply line 31a is opened and the decompression nozzle 22 is passed to supply hot water including the fine bubble generating device 10 to the bathtub 50. It is possible to generate microbubbles, lowering the initial cost, attachable environment is less likely to be limited because it the bath hot water supply device 30 compactly.

In other words, since the small bubble generator 10 is provided in the bath hot water supply device 30 in a compact manner, when the fine bubble generator 10 is to be added to the existing bath facility, the hot water supply device 30 for the bath is replaced. By doing so, it becomes possible to add a function of generating fine bubbles.
Accordingly, it is not necessary to attach a disturbing adapter to the faucet or the like, and the hot water containing fine bubbles can be supplied to the bathtub 50 by operating the hot water supply device 30 for bath.
Furthermore, since the structure is simple and it is composed of inexpensive parts, the cost is low, and since the pressure of tap water is used, it is not necessary to increase the capacity of the bath circulation pump 17 and the bath water heater 30 is replaced. Since the installation work is completed only by this, the initial cost can be reduced.

(2) In the hot water supply device for a bath described in (1),
The fine bubble generating device 10 is provided with an intake port 32a for supplying gas to the gas-liquid dissolution tank 20, and a flow path provided at the upper part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 from the intake port 32a. A three-way solenoid valve 12 for switching between the flow path connected to the gas-liquid dissolution tank 20 from the water supply line 31a, and a controller 18 for controlling the three-way solenoid valve 12 and the first fluid shut-off valve 13.
The controller 18
(A) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the intake port 32a, and the first fluid shutoff valve 13 is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank 20. Gas filling means for filling the gas-liquid dissolution tank 20 with gas from the air inlet 32a;
(B) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the water supply line 31a, the first fluid shut-off valve 13 is shut off, and tap water is supplied to the gas-liquid dissolution tank 20 from the water supply line 31a. And pressurizing and dissolving means for increasing the internal pressure of the gas-liquid dissolving tank 20 with the water pressure of tap water,
(C) By opening the first fluid shut-off valve 13 with the three-way solenoid valve 12 communicating with the gas-liquid dissolution tank 20 from the water supply line 31a, the fine bubble generating means for allowing the fluid to pass through the decompression nozzle 22 And the gas filling means, the pressure dissolving means, and the fine bubble generating means are sequentially switched, so that the same effect as in (1) is obtained.

(Third embodiment)
Next, the configuration of the third embodiment will be described.
The third embodiment differs from the first embodiment in the configuration of the microbubble generator 10 in that the pressure reducing nozzle 22 is different.
FIG. 11 shows the structure of the pressure reducing valve of the third embodiment, and FIG. 11A shows a view of the pressure reducing valve of the third embodiment as viewed from the downstream side of the flow path. FIG. 11B shows a sectional view of the pressure reducing valve of the third embodiment.
The decompression nozzle 22 of the third embodiment is installed in the horizontal direction by separating the decompression nozzle 22 from the fine bubble generating device 10, and in addition to the orifice portion 22a, the conical portion 22b, the mesh 22c, and the discharge hole 22d, the decompression nozzle 22 is decompressed. The nozzle input part 22e and the eddy current generation part 22f are provided.

The pressure reducing nozzle input unit 22e is provided on the upstream side of the pressure reducing nozzle 22, and takes in tap water supplied from the fine bubble generating device 10 therefrom.
The inner diameter of the pressure reducing nozzle input portion 22e is a little less than 1/3 of the inner diameter of the eddy current generating portion 22f, and is attached to the cylindrical pressure reducing nozzle 22 in the normal direction.
On the other hand, the eddy current generating part 22f includes a cylindrical part and a conical part, and is connected to the orifice part 22a. And the pressure reduction nozzle input part 22e is attached to the normal line direction of the cylindrical part of the eddy current generation part 22f.
Other parts are the same as those of the pressure reducing nozzle 22 of the first embodiment shown in FIGS. 5 (a) and 5 (b).
The decompression nozzle 22 is incorporated in the hot water supply device 30 for a bath, and the configuration of the hot water supply device 30 for a bath of the first embodiment shown in FIG. 6 and the hot water supply device 30 for a bath of the second embodiment shown in FIG. Applicable to either configuration.
With respect to the attachment position, the pressure reduction nozzle 22 is attached to the lower part of the fine bubble generating device 10 before the water outlet 32b and the follow-up line 33b are branched or to the follow-up line 33b after the branch. It is done.

Since the third embodiment is configured as described above, the following operations and effects are achieved.
As described in the first embodiment, the fine bubble generating device 10 may be difficult to incorporate in the hot water supply device 30 for a bath because the length a shown in FIG. 3 needs to be longer than the inner diameter b. .
In such a case, the fine bubble generating device 10 can be easily incorporated in the hot water supply device 30 for bath by separating and attaching the decompression nozzle 22 from the gas-liquid dissolution tank 20.
As described above, even if the decompression nozzle 22 is separated from the gas-liquid dissolution tank 20, there is no significant difference in function. Therefore, by separating the gas-liquid dissolution tank 20 and installing the decompression nozzle 22, hot water for baths is provided. There is a great merit in that the device 30 can be configured compactly.

By the way, in the first embodiment and the second embodiment, the decompression nozzle 22 can be separated from the gas-liquid dissolution tank 20, but when the decompression nozzle 22 is separated, the decompression nozzle 22 depends on the installation direction of the decompression nozzle 22. May easily generate large bubbles.
For example, it has been confirmed by experiments that large bubbles are likely to be generated when the decompression nozzle 22 shown in the first embodiment of FIGS. 5A and 5B is installed in the horizontal direction.
This causes a problem that the fine bubbles mixed in the white turbid hot water supplied to the bathtub 50 are easily grown, and the white turbidity is lowered.
In order to cope with such a problem, when the decompression nozzle 22 is installed horizontally, the configuration as shown in FIG. 11 can be used to make it difficult for large bubbles to be generated.

Specifically, the decompression nozzle 22 is installed in the horizontal direction, and the decompression nozzle input portion 22e is provided in the normal direction of the decompression nozzle 22 with respect to the decompression nozzle 22, and is supplied from the gas-liquid dissolution tank 20. By flowing tap water mixed with bubbles, a vortex flow can be generated in the vortex generator 22f.
This is because the pressure reducing nozzle input portion 22e is connected to the pressure reducing nozzle 22 in the normal direction, so that a water flow with water pressure from the gas-liquid dissolution tank 20 flows along the inner wall of the vortex flow generating portion 22f, A vortex flow is formed in the cylindrical portion of the vortex generating portion 22f.
As a result, the tap water passes through the orifice portion 22a with a spiral flow and passes through the discharge hole 22d and the mesh 22c, thereby supplying tap water in which fine bubbles are mixed into the bathtub 50 without generating large bubbles. It is possible.

Although it is not clear about this principle, when the decompression nozzle 22 is installed in the vertical direction, in addition to the water pressure of about 0.2 MPa applied when being supplied from the gas-liquid dissolution tank 20, water While it is difficult for large bubbles to be created due to the help of the dead weight, when the pressure reducing nozzle 22 is installed in the horizontal direction, the dead weight of water acts unevenly in the vortex generator 22f, which is adversely affected. It is inferred that
For this reason, the pressure reducing nozzle input part 22e is installed in the normal direction of the pressure reducing nozzle 22, and a vortex-like flow is created in the eddy current generating part 22f, so that the influence of the weight of water when passing through the orifice part 22a is reduced. It is thought that there is a mitigating action.
Therefore, for example, if the pressure reducing nozzle input portion 22e is not perpendicular to the pressure reducing nozzle 22 but is connected to the normal direction of the pressure reducing nozzle 22 at a slight angle, it is considered that the flow becomes smoother. Does not prevent you from doing.

In the experiment, the inner diameter of the pressure reducing nozzle input portion 22e is set to φ8 mm with respect to the inner diameter φ20 mm of the eddy current generating portion 22f. If the inner diameter of the pressure reducing nozzle input portion 22e is too large, a vortex flow cannot be effectively formed by the eddy current generating portion 22f. Conversely, if the inner diameter is too small, the flow rate at the pressure reducing nozzle input portion 22e is reduced. It became.
Therefore, it is necessary to set the inner diameter of the pressure reducing nozzle input portion 22e to a level that can ensure a necessary flow rate and effectively ensure a vortex flow in the vortex generating portion 22f by making it slightly larger than the orifice portion 22a. is there.

According to the fine bubble generating device and the hot water supply device for a bath of the third embodiment described above, the following excellent actions and effects can be obtained.
(1) In a hot water supply device for a bath provided with a fine bubble generator 10 for supplying hot water containing fine bubbles to a bathtub,
The fine bubble generator 10 includes a gas-liquid dissolution tank 20 for dissolving a gas in a liquid, a water supply line 31 a for supplying tap water to the gas-liquid dissolution tank 20, and a plurality of units provided above the gas-liquid dissolution tank 20. A fluid nozzle 21 having a small hole, a decompression nozzle 22 provided in a flow path below the gas-liquid dissolution tank 20, and a flow provided at the lower part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 A first fluid shut-off valve 13 that shuts off and communicates with the passage, and is supplied to the gas-liquid dissolution tank 20 filled with gas and closed by the first fluid shut-off valve 13 from the water supply line 31a through the fluid nozzle 21. Water is supplied, and after a predetermined time, the water supply line 31a is opened and the decompression nozzle 22 is passed to supply hot water including the fine bubble generating device 10 to the bathtub 50. Can be generated microbubbles, lowering the initial cost, attachable environment is less likely to be limited because it the bath hot water supply device 30 compactly.

In other words, since the small bubble generator 10 is provided in the bath hot water supply device 30 in a compact manner, when the fine bubble generator 10 is to be added to the existing bath facility, the hot water supply device 30 for the bath is replaced. By doing so, it becomes possible to add a function of generating fine bubbles.
Accordingly, it is not necessary to attach a disturbing adapter to the faucet or the like, and the hot water containing fine bubbles can be supplied to the bathtub 50 by operating the hot water supply device 30 for bath.
Furthermore, since the structure is simple and it is composed of inexpensive parts, the cost is low, and since the pressure of tap water is used, it is not necessary to increase the capacity of the bath circulation pump 17 and the bath water heater 30 is replaced. Since the installation work is completed only by this, the initial cost can be reduced.

(2) In the hot water supply device for a bath described in (1),
The fine bubble generating device 10 is provided with an intake port 32a for supplying gas to the gas-liquid dissolution tank 20, and a flow path provided at the upper part of the gas-liquid dissolution tank 20 and connected to the gas-liquid dissolution tank 20 from the intake port 32a. A three-way solenoid valve 12 for switching between the flow path connected to the gas-liquid dissolution tank 20 from the water supply line 31a, and a controller 18 for controlling the three-way solenoid valve 12 and the first fluid shut-off valve 13.
The controller 18
(A) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the intake port 32a, and the first fluid shutoff valve 13 is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank 20. Gas filling means for filling the gas-liquid dissolution tank 20 with gas from the air inlet 32a;
(B) The three-way solenoid valve 12 is controlled to communicate with the gas-liquid dissolution tank 20 from the water supply line 31a, the first fluid shut-off valve 13 is shut off, and tap water is supplied to the gas-liquid dissolution tank 20 from the water supply line 31a. And pressurizing and dissolving means for increasing the internal pressure of the gas-liquid dissolving tank 20 with the water pressure of tap water,
(C) By opening the first fluid shut-off valve 13 with the three-way solenoid valve 12 communicating with the gas-liquid dissolution tank 20 from the water supply line 31a, the fine bubble generating means for allowing the fluid to pass through the decompression nozzle 22 And the gas filling means, the pressure dissolving means, and the fine bubble generating means are sequentially switched, so that the same effect as in (1) is obtained.

(3) In the hot water supply device 30 for a bath described in (1) or (2),
The decompression nozzle 22 includes an input part, an orifice part 22a, and an output part, and is formed in a cylindrical flow path in the horizontal direction. The vortex flow generation part 22f is perpendicular to the flow direction of the cylindrical flow path. The pressure reducing nozzle input portion 22e is connected to the nozzle portion, and the diameter of the orifice portion 22a is narrowed conically from the vortex generating portion 22f to the orifice portion 22a. The orifice portion 22a has an opening area larger than the total area of the plurality of small holes 21a of the fluid nozzle 21. The output portion is provided with a conical wall surface provided with a plurality of discharge holes 22d through gaps, and a surface extending in a conical shape from the orifice portion 22a to the output portion. A mesh 22c is provided downstream of 22d,
When tap water is supplied from the gas-liquid dissolution tank 20 to the decompression nozzle input unit 22e, the tap water creates a vortex flow in a direction perpendicular to the flow at the outer periphery of the vortex generation unit 22f and is introduced to the orifice unit 22a. Since it passes through the discharge hole 22d and the mesh 22c through a gap, the specific conditions of the pressure reducing nozzle 22 of the fine bubble generating device 10 provided in the hot water supply device 30 for a bath of (1) or (2) It is possible to increase the effect of

When the pressure reducing nozzle 22 of the fine bubble generating device 10 included in the bath water heater 30 of (1) or (2) described above needs to be installed horizontally due to the layout inside the bath water heater 30, large bubbles are generated. It was easy to occur.
Specifically, the decompression nozzle 22 having the shape shown in Patent Document 2 is a lower part of the gas-liquid dissolution tank 20 and is difficult to generate large bubbles when arranged in the vertical direction. Is likely to occur.
Therefore, when the decompression nozzle 22 is installed in the horizontal direction, the tap water can be installed in the vortex generator 22f by installing the decompression nozzle input section 22e perpendicular to the flow direction of the cylindrical flow path as described above. By creating a spiral flow in the direction perpendicular to the flow at the outer periphery of the nozzle, there is an effect of suppressing the generation of large bubbles when passing through the pressure reducing nozzle 22.
If large bubbles do not occur at the decompression nozzle 22, the bubbles will grow in the subsequent pipes and will not decrease the white turbidity when reaching the bath 50, contributing to enhancing the feeling of bathing.
Moreover, since a complicated mechanism is not required, the initial cost is not increased unnecessarily.

(Fourth embodiment)
Next, the configuration of the fourth embodiment will be described.
The fourth embodiment is basically an invention based on the same principle as the first embodiment, but differs in that the structure is simplified.
In FIG. 12, the block diagram which has arrange | positioned the microbubble generator 10 of 4th Example in the bathroom is shown.
FIG. 12 corresponds to FIG. 7 of the first embodiment, and is different in that the simple fine bubble generating device 10 a is not built in the hot water supply device 30 for bath but is installed in the bathroom 60.
Also, the configuration of the simple microbubble generator 10a itself is slightly different from the microbubble generator 10 of the first embodiment. The following explains the differences.
First, the microbubble generator 11 of the simple microbubble generator 10a does not include the first fluid shut-off valve 13. Also, the controller 18 is not provided. Further, instead of providing the three-way solenoid valve 12, a three-way manual valve 12a is provided.
Therefore, the simple microbubble generator 10a includes the gas-liquid dissolution tank 20, the fluid nozzle 21, the decompression nozzle 22, and the three-way manual valve 12a, and the intake port 32a and the branch hot water supply line 39a are connected to the three-way manual valve 12a. From the fine bubble generator 11, a fine bubble water supply line 39 b is connected so that hot water containing fine bubbles can be supplied into the bathtub 50.
In addition, the pressure reduction nozzle 22 may be provided in the lower surface of the gas-liquid dissolution tank 20, and may be provided in the middle or the front-end | tip of the fine bubble water supply line 39b.

Of the above, the branched hot water supply line 39a is branched from the water supply line 31a, is branched from the water supply line 31a before the hot water tap 55, and is connected to the three-way manual valve 12a provided in the simple microbubble generator 10a. ing.
Since this branch hot water supply line 39a is branched, for example, like a shower connected to the bathroom 60, it can be easily connected.
The three-way manual valve 12a has almost the same function as the three-way solenoid valve 12 of the first embodiment, but is not controlled by the controller 18, and the handle 14 provided on the three-way manual valve 12a The connection to the mouth 32a and the branch hot water supply line 39a and the fine bubble generator 11 is changed.
Such a simple microbubble generator 10 a needs to be installed in the bathroom 60 with the three-way manual valve 12 a side up, and is hung on the wall of the bathroom 60 at a position higher than the water surface of the bathtub 50. Installed.
The simple microbubble generator 10a is substantially the same in principle as the microbubble generator 10 of the first embodiment, and may be built in the hot water supply apparatus 30 for bath.

Since the fourth embodiment is configured as described above, the following operations and effects can be achieved.
In order to start using the simple microbubble generator 10a, it is necessary to fill the gas-liquid dissolution tank 20 with gas as described in the first embodiment.
Therefore, the handle 14 is switched to connect the three-way manual valve 12a to the intake port 32a.
When the intake port 32a and the gas-liquid dissolution tank 20 are communicated with each other, when water is accumulated in the gas-liquid dissolution tank 20, the water in the gas-liquid dissolution tank 20 is supplied with a fine bubble water supply line by its own weight. It is discharged through 39b. At this time, the position of the gas-liquid dissolution tank 20 is lower than the position of the water surface of the bathtub 50, and the installation position is devised so that introduction of air into the gas-liquid dissolution tank 20 is not hindered. It is necessary to be careful.

When the gas-liquid dissolution tank 20 is filled with air, the handle 14 is switched, and this time, the branch hot water supply line 39a and the gas-liquid dissolution tank 20 are communicated.
Then, the gas-liquid dissolution tank 20 is filled with air, and hot water supplied from the branch hot water supply line 39a and passing through the fluid nozzle 21 is supplied into the gas-liquid dissolution tank 20 in a shower-like manner. As a result, hot water that is heavier than the air inside the gas-liquid dissolution tank 20 is discharged from the fine bubble water supply line 39b. It becomes the state which has accumulated.

Here, in order for the simple microbubble generator 10 a to work effectively, the effective cross-sectional area of the pressure-reducing nozzle 22 needs to be smaller than that of the fluid nozzle 21. Specifically, the total area of the plurality of small holes 21a needs to be larger than the orifice portion 22a of the decompression nozzle 22, and as shown in the first embodiment, it has such a configuration. The amount of hot water discharged from the fine bubble water supply line 39b is smaller than the amount of hot water supplied from the branch hot water supply line 39a, and therefore the internal pressure of the gas-liquid dissolution tank 20 gradually increases.
Assuming that hot water from the branch hot water supply line 39a is about 0.2 MPa by the pressure of tap water, the internal pressure of the gas-liquid dissolution tank 20 rises to 0.2 MPa. If the internal pressure of the gas-liquid dissolution tank 20 becomes 0.15 MPa or more, gas-liquid dissolution is performed as much as necessary, and the inside of the bathtub 50 is clouded with hot water containing fine bubbles supplied from the fine bubble water supply line 39b. be able to.

Compared to the first embodiment, since the first fluid shutoff valve 13 is not provided, it takes time to increase the internal pressure of the gas-liquid dissolution tank 20, and after switching the three-way manual valve 12a, it takes 5 to 6 seconds. Will be supplied with hot water that does not contain fine bubbles, but thereafter it will be possible to supply hot water containing fine bubbles as in the first embodiment.
In addition, since the air taken into the gas-liquid dissolution tank 20 is only for the capacity of the gas-liquid dissolution tank 20, fine bubbles cannot be continuously generated. For example, about 20 L of hot water is supplied to the bathtub 50. It is effective to use it for so-called hot water.
If the process of generating fine bubbles once is 20 L, and the batch operation is performed by switching the three-way manual valve 12a with the handle 14 again, filling the air, and pouring hot water again, you can enjoy hot water that becomes cloudy due to the fine bubbles. be able to.
Further, if the fine bubble water supply line 39b is made of a soft material such as a hose, a way of enjoying such as pouring hot water containing fine bubbles from the shoulder during bathing can be considered.

By such an action, as described in the first to third embodiments, it becomes possible to fill the bathtub 50 with hot water that contains fine bubbles and become cloudy, and enjoy bathing.
Compared with the microbubble generator 10 described in the first embodiment, the simple microbubble generator 10a does not include the first fluid shutoff valve 13 and the controller 18, and the three-way solenoid valve 12 is also a three-way manual valve 12a. Therefore, the cost can be reduced, and the installation can be done by the work of branching in front of the hot water tap 55, so the cost can be reduced.
In addition, since the structure is simple, there are advantages such as fewer failures and easy maintenance.

According to the fine bubble generator 10 and the hot water supply device 30 for the bath of the fourth embodiment described above, the following excellent actions and effects can be obtained.
(1) In the simple microbubble generator 10a for supplying tap water containing microbubbles to the bathtub 50,
From the gas-liquid dissolution tank 20, the intake port 32a, the branch hot-water supply line 39a, the flow path connected to the gas-liquid dissolution tank 20 from the intake port 32a, and the branch hot-water supply line 39a. A three-way manual valve 12 a for switching between the flow path connected to the gas-liquid dissolution tank 20, a fluid nozzle 21 formed on the upper surface of the gas-liquid dissolution tank 20 and having a plurality of small holes, and the gas-liquid dissolution tank 20 A pressure reducing nozzle 22 provided in a flow path connected to the lower surface and having a smaller diameter than the fluid nozzle 21;
The gas-liquid dissolution tank 20 filled with gas from the intake port 32a is connected to the gas-liquid dissolution tank 20 from the branch hot water supply line 39a through a flow path connecting from the intake port 32a to the gas-liquid dissolution tank 20 with the three-way manual valve 12a. By switching to the flow path, tap water is supplied from the branch hot water supply line 39 a via the fluid nozzle 21, and the tap water passes through the decompression nozzle 22, so that fine bubble water containing fine bubbles is added to the tap water in the bathtub 50. Since it supplies, it becomes possible to install the simple microbubble generator 10a separately from the hot water supply device 30 for baths of (1) to (3).

The simple microbubble generator 10a provided in the hot water supply device 30 for bath (1) described above includes a three-way manual valve 12a, and the three-way manual valve 12a blocks and communicates with the microbubble to generate fine bubbles. Even if the three-way manual valve 12a is omitted, it is possible to easily generate fine bubbles.
In both the above (1) and (4), the gas is dissolved in the supplied tap water by supplying the tap water into the gas-liquid dissolution tank 20 filled with the gas.
However, the amount of gas dissolved in tap water under atmospheric pressure is insufficient to generate fine bubbles. Therefore, in (1), the three-way manual valve 12a is used to shut off the flow path downstream from the gas-liquid dissolution tank 20 and supply tap water, whereby the gas-liquid dissolution tank 20 is pressurized by the tap water pressure. The internal pressure rises and the gas is easily dissolved in the tap water. This is because the amount of dissolved gas in the liquid is proportional to the pressure.

However, this effect can also be realized by reducing the opening area of the decompression nozzle 22 relative to the opening area of the fluid nozzle 21. This is because the internal pressure of the gas-liquid dissolution tank 20 gradually increases if the amount of tap water discharged from the gas-liquid dissolution tank 20 is less than the amount of tap water supplied to the gas-liquid dissolution tank 20. It is.
And in any of the method of 1st Example thru | or 4th Example, the inside of the gas-liquid dissolution tank 20 is pressurized until it becomes equal to the water pressure of the tap water supplied from a supply port. As a result, the gas is dissolved in the tap water as described above, and the pressure of the tap water is lowered when passing through the decompression nozzle 22, and the dissolved gas is released into the tap water.
As a result, the tap water in a state containing fine bubbles is supplied to the bathtub 50.

By adopting the configuration (1) as described above, the simple microbubble generator 10a can be provided at low cost. According to the configuration of (1), it is possible to generate fine bubbles by supplying tap water and switching the intake port 32a and branch hot water supply line 39a by the three-way manual valve 12a. If the inlet 32a and the branch hot water supply line 39a are switched by 12a, complicated control is not required, and the compact simple microbubble generator 10a can be provided.
As a result, it can be used, for example, as a simple simple microbubble generator 10a connected to a pipe branched from the hot water tap 55 of the bathroom 60, and microbubbles can be easily generated.

(2) Since it is the hot water supply device 30 for a bath characterized by including the simple microbubble generator 10a described in (1), it is more than the hot water supply device for a bath 30 of the first to third embodiments. Cost can be reduced.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, it is not prohibited to make a design change such that the three-way solenoid valve 12 is configured to use two cutoff valves, or the first fluid cutoff valve 13 and the third fluid cutoff valve 38b are three-way solenoid valves.
Moreover, although the dimension of the apparatus used for experiment is described in 1st Example, it does not specifically limit to this numerical value and can be changed by design.
Moreover, in 4th Example, it does not prevent that the simple microbubble generator 10a is incorporated in the hot water supply apparatus 30 for baths, and the controller 18 and the 1st fluid cutoff valve 13 may be provided in the simple microbubble generator 10a. In this case, since it is necessary to supply power to the controller 18, the construction becomes large, but from the start of the supply of hot water from the branch hot water supply line 39a, from the simple microbubble generator 10a for 5 to 6 seconds. The point that a fine bubble does not generate | occur | produce can be eliminated.
Further, in the first to fourth embodiments, if a cartridge for supplying oxygen, for example, to the air inlet 32a is used, it is possible to generate fine bubbles of oxygen, which enhances the feeling of bathing and makes it difficult to cool down when the water is finished. Various operations are conceivable, such as

The block diagram of the fine bubble generator of 1st Example is shown. The cross section of the fine bubble generator of 1st Example is typically shown. Sectional drawing of the gas-liquid dissolution tank of 1st Example is shown. (A) Sectional drawing in the state attached to the gas-liquid dissolution tank of the fluid nozzle of 1st Example is shown. (B) The figure seen from the lower surface of the fluid nozzle of 1st Example is shown. (A) The sectional view of the decompression nozzle of the 1st example is shown. (B) The lower surface of the decompression nozzle of the first embodiment is shown. The system block diagram of the hot-water supply apparatus for baths of 1st Example is shown. The block diagram which connects the hot-water supply apparatus for baths of a 1st Example to a bathtub is shown. (A) The process of the gas filling operation of the first embodiment is shown. (B) The process of the pressure dissolution operation of the first embodiment is shown. (C) A process for generating fine bubbles according to the first embodiment is shown. The graph showing the relationship between white turbidity and driving | running time of 1st Example is shown. The system block diagram of the hot-water supply apparatus for baths of 2nd Example is shown. (A) The sectional view of the decompression nozzle of the 3rd example is shown. (B) The side surface of the decompression nozzle of the third embodiment is shown. The block diagram which installed the simple microbubble generator of 4th Example in the bathtub is shown. The block diagram of the bathtub system of patent document 1 is shown. The fine bubble generation nozzle of patent document 2 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fine bubble generator 11 Fine bubble generator 12 Three-way solenoid valve 13 1st fluid shutoff valve 14 Handle 17 Bath circulation pump 18 Controller 19 Remote control 20 Gas-liquid dissolution tank 21 Fluid nozzle 21a Small hole 22 Decompression nozzle 22a Orifice part 22b Cone part 22c Mesh 22d Discharge hole 22e Depressurization nozzle input part 22f Eddy current generating part 30 Hot water supply device 31a Water supply line 31b Hot water supply line 32a Intake port 32b Drain port 33a Additional return line 33b Additional return line 34 Branch line 35 Hot water supply heat exchanger 35a Heat exchanger for hot water supply 36 Heat exchanger for remedy 36a Heat exchanger for remedy 37 Check valve 38 Bypass line 38a Second fluid shutoff valve 38b Third fluid shutoff valve 38c Fourth shutoff valve 38d Fifth fluid shutoff valve 50 Bathtub 51 Hot-water supply fitting 55 Hot-water tap 60 Bathroom

Claims (5)

In a hot water supply apparatus for a bath equipped with a fine bubble generator for supplying hot water containing fine bubbles to a bathtub,
The fine bubble generator is
A gas-liquid dissolution tank for dissolving gas in the liquid;
A water supply port for supplying tap water to the gas-liquid dissolution tank;
A fluid nozzle having a plurality of small holes provided in an upper portion of the gas-liquid dissolution tank;
A decompression nozzle provided in a flow path below the gas-liquid dissolution tank;
A fluid blocking means provided at a lower part of the gas-liquid dissolution tank and blocking and communicating with a flow path connected to the gas-liquid dissolution tank;
With
The tap water is supplied from the water supply port through the fluid nozzle to the gas-liquid dissolution tank filled with gas and closed by the fluid shut-off means,
A hot water supply apparatus for a bath which supplies hot water containing the fine bubbles to the bathtub by opening the fluid blocking means after a predetermined time and passing through the pressure reducing nozzle. In the hot water supply apparatus for a bath according to claim 1,
The fine bubble generator is
An air inlet for supplying gas to the gas-liquid dissolution tank;
Provided at the top of the gas-liquid dissolution tank;
A flow path connected from the intake port to the gas-liquid dissolution tank;
A flow path connected to the gas-liquid dissolution tank from the water supply port;
Channel switching means for switching between,
A controller for controlling the flow path switching means and the fluid blocking means,
The controller is
(A) The flow path switching means is controlled to communicate with the gas-liquid dissolution tank from the intake port, and the fluid blocking means is communicated so that liquid or gas can be discharged from the gas-liquid dissolution tank,
Gas filling means for filling the gas-liquid dissolution tank with gas from the intake port;
(B) The flow path switching means is controlled to communicate with the gas-liquid dissolution tank from the water supply port, and the fluid shut-off means is shut off,
Pressure dissolving means for supplying the tap water from the water supply port to the gas-liquid dissolution tank and increasing the internal pressure of the gas-liquid dissolution tank with the water pressure of the tap water;
(C) The flow path switching means is connected to the gas-liquid dissolution tank from the water supply port, and the fluid blocking means is opened so that the fine bubble generating means for allowing the fluid to pass through the pressure reducing nozzle is provided. And
A hot water supply apparatus for a bath, wherein the gas filling means, the pressure dissolving means, and the fine bubble generating means are sequentially switched. In the hot water supply apparatus for a bath according to claim 1 or claim 2,
The vacuum nozzle is
It consists of an input part, an orifice part, and an output part, and is formed in a cylindrical channel in the horizontal direction.
In the input section,
A narrow tube is connected perpendicularly to the flow direction of the cylindrical flow path, and the diameter is narrowed conically from the input part to the orifice part,
The orifice part is
The aperture is narrowed so that the opening area is narrower than the total area of the plurality of small holes of the fluid nozzle,
In the output section,
A surface extending in a conical shape from the orifice portion to the output portion, and a conical wall surface provided with a plurality of discharge holes via a gap, a porous body is provided downstream of the discharge holes,
By supplying the tap water from the gas-liquid dissolution tank to the narrow tube, the tap water creates a spiral flow along the normal direction of the outer peripheral portion of the input portion, and is guided to the orifice portion, and the gap A hot water supply apparatus for a bath, which passes through the discharge hole and the porous body through a wall. In the fine bubble generator that supplies tap water containing fine bubbles to the bathtub,
A gas-liquid dissolution tank for dissolving gas in the liquid;
An air inlet for supplying gas to the gas-liquid dissolution tank;
A water supply port for supplying the tap water to the gas-liquid dissolution tank;
Provided at the top of the gas-liquid dissolution tank;
A flow path connected from the intake port to the gas-liquid dissolution tank;
A flow path connected to the gas-liquid dissolution tank from the water supply port;
Channel switching means for switching between,
A fluid nozzle formed on the upper surface of the gas-liquid dissolution tank and having a plurality of small holes;
A decompression nozzle provided in a flow path connected to the lower surface of the gas-liquid dissolution tank, and having a smaller diameter than the fluid nozzle;
With
The gas-liquid dissolution tank filled with gas from the intake port is connected to the gas-liquid dissolution tank from the water supply port through a flow path connected from the intake port to the gas-liquid dissolution tank by the flow path switching means. By switching to the flow path, the tap water is supplied from the water supply port via the fluid nozzle,
The fine bubble generating device, wherein the tap water passes through the decompression nozzle, and thereby the fine bubble water containing the fine bubbles is supplied to the tap water.   A hot water supply device for a bath, comprising the fine bubble generating device according to claim 4.

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