JP2002330885A - Bathtub system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently dissolve air in bathtub water without using an expensive circulation pump and to improve operation efficiency in a bathtub system generating micro bubbles. SOLUTION: The bathtub water is taken out from a bathtub 1 to a circulation passage by a circulation pump 8, the air is dissolved in the bathtub water by an air/liquid mixing tank 9 via a three-way valve 11 and returns from a micro bubble nozzle 4 to the bathtub to generate the micro bubbles. When the air in the air/liquid mixing tank 9 is reduced, the three-way valve 11 is changed over to a side of a jet nozzle 3, and an air valve 18 and a discharge valve 20 of the air/liquid mixed tank 9 are released so that the bathtub water in the air/liquid mixing tank 9 is jet out and discharged from the jet nozzle 3 to the bathtub using a negative pressure generated in the jet nozzle 3 via a suction pipe 19 and simultaneously, the air is introduced into the air/liquid mixing tank 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub system which takes out bathtub water in a bathtub, dissolves air in the bathtub water, and returns the bathtub bath to generate fine bubbles in the bathtub.

[0002]

2. Description of the Related Art Conventionally, fine bubbles are generated to purify suspended matter in water by utilizing the floating action of adhesion of fine bubbles, and bathtub water is made milky to enhance a bathing sensation. are doing.

FIG. 4 shows a configuration of a conventional bathtub system for generating fine bubbles. A circulation path 81 is connected to a bath water outlet 91 and a return port 92 provided in the bathtub 90, and a circulation pump 82 is provided in the middle of the circulation path 81. A venturi 83 is provided on the upstream side, and a microbubble nozzle 84 is provided at a portion of the circulation path 81 connected to the return port 92.

The venturi 83 is generally known, but the inside of the venturi 83 is brought into a negative pressure state with the passage of the bathtub water, and the outside air at atmospheric pressure is supplied to the air introduction pipe 85.
It comes to be inhaled from. The amount of air suctioned by the venturi 83 is adjusted by the passage speed of bathtub water and the opening of a motor-operated valve 86 provided at the end of the air introduction pipe 85.

Here, the operation of generating fine bubbles will be described.
The tub water in the tub 90 is taken out by the circulating pump 82, external air is mixed into the tub water by the venturi 83, and the air is dissolved in the tub water by the pressure of the circulating pump 82. The liquid is discharged into the bathtub 90 and returned therethrough, so that fine bubbles 100 are generated in the bathtub 90. That is, Venturi 83
When the bathtub water mixed with air is pressurized by the circulation pump 82 to dissolve the air and then returned into the bathtub 90, the pressure applied to the bathtub water is released all at once in the bathtub 90. , And the air dissolved in the bathtub water precipitates to form microbubbles 100.

[0006] Here, the suspended matter 1 in the bathtub water in the bathtub 90.
In the case where 01 is present, the suspended matter 101 adheres to the fine bubbles 100 generated in the bathtub 90 as described above, and floats on the surface of the bathtub water.
The water is discharged through an overflow drain 93 and a drain pipe 94 provided in the bathtub 90.

[0007]

In the above conventional example, since the air is sucked into the bathtub water by the venturi 83 disposed upstream of the circulation pump 82, relatively large air bubbles are generated in the bathtub water. As it becomes easy to mix, each air bubble may combine and grow large,
There is a concern that the circulation pump 82 is likely to be air-locked. For this reason, conventionally, the circulation pump 8
As 2, it was necessary to use an expensive one having excellent air lock resistance.

[0008] In view of such circumstances, the present applicant has developed a microbubble generator which can efficiently dissolve air in a liquid without using an expensive circulation pump on December 21, 1999. It has been previously proposed as Japanese Patent Application No. 11-36331, "Microbubble generator".

FIG. 5 is a diagram showing the configuration of a bathtub system using the previously proposed microbubble generator. The bath tub water in the bath tub 10 is taken out from the outlet 11 once, the air is dissolved in the bath tub water, and then returned to the bath tub 10 through the outlet 12 to generate fine bubbles in the bath tub 10. Circulation passage 21, circulation pump 2
2, a gas-liquid mixing tank 23 and a controller 24 are provided. The gas-liquid mixing tank 23 is provided downstream of the circulation pump 22 in the circulation passage 21, while entraining the stored air inside the bathtub water pressurized by the circulation pump 22 to dissolve the water and then partially storing the air. Let it pass.

In this bathtub system, when the circulation pump 22 is driven, bathtub water is drawn out of the bathtub 10 into the circulation passage 21 and introduced into the gas-liquid mixing tank 23.

At this time, the bath water is pressurized by the circulation pump 22 into the gas-liquid mixing tank 23 and is urged vigorously against the bottom surface in the gas-liquid mixing tank 23 by the injection nozzle 26. And gas-liquid mixing tank 23
Entrain the air inside. As the required time elapses, the gas is discharged from the bottom surface of the gas-liquid mixing tank 23 to the circulation passage 21 side, but is gradually stored in the gas-liquid mixing tank 23 due to the balance between the amount of bath water introduced and the amount discharged. become. Along with the storage of the bathtub water, the bathtub water introduced from the injection nozzle 26 collides with the stored bathtub water, and is stirred while the air in the gas-liquid mixing tank 23 is entrained. A large amount of air will be dissolved in the bath water.

In this way, a large amount of air is dissolved in the bathtub water in the gas-liquid mixing tank 23. The bathtub water discharged from the gas-liquid mixing tank 23 is supplied to the bathtub 10 from the fine bubble nozzle 25. It is discharged inside and decompressed. When the bathtub water is returned into the bathtub 10, the pressure applied to the bathtub water is released at once in the bathtub 10, so that the air dissolved in the bathtub water is deposited and a large number of fine bubbles 1 are formed.
6 will be generated.

As described above, the liquid pressurized by the circulation pump 22 is vigorously flowed into the gas-liquid mixing tank 23 so as to entrain the internally stored air to dissolve the liquid. As a result, the liquid containing air bubbles does not flow, so that it is not necessary to use an expensive circulation pump having excellent air lock resistance. 13 is a drain pipe 14
Is an overflow drain port connected to the motor, and 15 is a motor-operated valve.

However, in the microbubble generator of FIG. 5, the air in the gas-liquid mixing tank 23 dissolves in the bath water and decreases with the elapse of the operation time in the microbubble mode. Must be stopped and the air valve 27 and the drain valve 28 must be opened to discharge the bath water in the gas-liquid mixing tank 23 and introduce air into the tank. This further improves the operation efficiency. Is desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and enables efficient air dissolution in a liquid without using an expensive circulation pump.
An object of the present invention is to provide a bathtub system with improved operation efficiency.

[0016]

In order to achieve the above-mentioned object, the present invention is configured as follows.

That is, the bathtub system of the present invention according to the first aspect of the present invention provides a circulating pump for circulating bath water in the bathtub so as to take out and return the bathtub water, and jets a jet jet in which air is mixed into the circulating bathwater flow into the bathtub. Jet nozzle
A gas-liquid mixing tank provided downstream of the circulation pump for dissolving and passing the stored air therein in bathtub water pressurized and introduced by the circulation pump, and a gas-dissolved air from the gas-liquid mixing tank. The apparatus includes a fine bubble nozzle that discharges a liquid mixture water flow to generate fine bubbles in the bathtub, and a switching unit that switches a bathtub water circulation path by the circulation pump to the jet nozzle side or the fine bubble nozzle side. .

According to the first aspect of the present invention, since the circulation path can be switched to the jet nozzle side or the fine bubble nozzle side by the switching means, the apparatus includes the jet nozzle and the fine bubble nozzle. You can enjoy bathing in both jet mode and jet mode, and when you select jet mode operation, use the negative pressure generated by the jet nozzle,
For example, it is possible to blow out and discharge the bathtub water in the gas-liquid mixing tank into the bathtub to introduce air into the gas-liquid mixing tank.

According to a second aspect of the present invention, in the first aspect of the present invention, the jet nozzle is connected to one end of a suction pipe for sucking air to be mixed into the bathtub water flow by the generated negative pressure. The other end of the suction pipe is connected to the liquid mixing tank, and an air introduction pipe for introducing air into the gas-liquid mixing tank is connected to the circulation pump, the switching means, and the two pipes. Control means for controlling the opening and closing of the bath, the control means, after circulating the bathtub water by the circulation pump, the fine bubble nozzle side to generate fine bubbles in the bathtub, the circulation path, the Switching to the jet nozzle side, bathtub water in the gas-liquid mixing tank is discharged from the jet nozzle into the bathtub through the suction pipe to be discharged, and It is intended to introduce the air.

According to the second aspect of the present invention, a suction pipe is connected between the jet nozzle and the gas-liquid mixing tank by a negative pressure generated by the jet nozzle. After the water circulation path is set to the fine bubble nozzle side to generate fine bubbles in the bathtub, the water is switched to the jet nozzle side, and the bathtub water in the gas-liquid mixing tank is changed to the jet nozzle through the suction pipe. And discharged into the bath tub, and air is introduced into the gas-liquid mixing tank.If the air in the gas-liquid mixing tank is dissolved in the bath water and decreases, the operation is temporarily stopped. There is no need to discharge the bath water in the gas-liquid mixing tank and introduce air into the tank, it is sufficient to switch to the jet nozzle side, and when drainage in the gas-liquid mixing tank is completed,
You can enjoy bathing in the jet mode with the jet jet mixed with air.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the circulation path of the bathtub water is a branched circulation path from an outlet for taking out the bathtub water to the fine bubble nozzle or the jet nozzle. Wherein the circulation pump is disposed in the middle of the circulation path from the outlet to the branch, and the switching means is disposed in the branched part, and the circulation pump is disposed in the circulation path downstream of the switching means. The disposed gas-liquid mixing tank is configured to entrain the stored air in the tank into bath water which is pressurized and introduced by the circulation pump, dissolve the air therein, and then pass the stored air while storing a part thereof.

According to the third aspect of the present invention, the gas-liquid mixing tank is disposed downstream of the circulating pump, and the bath water pressurized by the circulating pump is supplied to the gas-liquid mixing tank by vigorously supplying the water therein. Since air is involved and dissolved, bathtub water containing air bubbles does not flow into the circulation pump, so that there is no need to use an expensive circulation pump having excellent air lock resistance.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a configuration diagram of a bathtub system according to one embodiment of the present invention.

The bathtub system according to this embodiment includes a bathtub 1
It is possible to switch between a fine bubble mode in which fine bubbles are generated in the inside and a jet mode in which a jet jet mixed with air is ejected.

The bathtub 1 is provided with a takeout port 2 for taking out bathtub water, a jet nozzle 3 for returning the bathtub water, and a fine bubble nozzle 4, and an overflow drain port 5 is provided at a required height position. . A drain pipe 6 is connected to the overflow drain port 5.
Is provided with a motor-operated valve 7 at its end.

This bathtub system includes a circulating pump 8 for taking out bathtub water from the outlet 2 and circulating it to return to the jet nozzle 3 or the fine bubble nozzle 4, and a circulating pump provided downstream of the circulating pump 8. The gas-liquid mixing tank 9 for dissolving and passing the stored air inside the bath water which is pressurized and introduced by the bath 8, and the circulation path 10 for the bath water by the circulation pump 8 are divided into a circulation path 10 a on the jet nozzle 3 side or a branch path. The circulation path 1 on the side of the fine bubble nozzle 4
A three-way valve 11 as switching means for switching to 0b;
A controller 12 is provided as control means for controlling each unit.

Jet nozzle 3 provided in bathtub 1
Is to jet a jet jet in which air is mixed into a circulating bath water stream into the bathtub 1, and the fine bubble nozzle 4 is
A gas-liquid mixed water stream in which air is dissolved from the gas-liquid mixing tank 9 is discharged to generate fine bubbles in the bathtub 1.

Bath water circulation path 1 from bath water outlet 2 to jet nozzle 3 or fine bubble nozzle 4
0, 10a and 10b are branched by a three-way valve 11,
The circulation path 1 from the three-way valve 11 to the fine bubble nozzle 4
0b, a gas-liquid mixing tank 9 is provided.

The gas-liquid mixing tank 9 is used to entrain the stored air inside the bath water, which is pressurized and introduced by the circulating pump 8, to dissolve the air therein, and then to pass a part of the air while storing the air. The gas-liquid mixing tank 9 is connected to the circulation path 10b so that the bathtub water is introduced from the ceiling surface and the bathtub water flows out from the bottom surface to the bathtub 1 side. An injection nozzle 13 having a reduced diameter is attached to a bath water introduction portion of the gas-liquid mixing tank 9.

The gas-liquid mixing tank 9 is provided with a rectifying plate 14 below the rectifying plate 14 for vertically separating the internal space into a bathtub water introduction space and a bathtub water outflow space. A cylindrical body 15 is provided on the upper surface of 14. The bathtub water introduced into the gas-liquid mixing tank 9 is
5 is stirred so that the air is dissolved therein, and the bathtub water which has flowed out from the upper opening of the cylindrical body 15 to the outer peripheral space through the outlet of the gas-liquid mixing tank 9 through the flow straightening plate 14 is supplied to the outside. And reaches the fine bubble nozzle 4 via the check valve 16. The current plate 14 prevents relatively large air bubbles from passing therethrough.

An air introduction pipe 17 for supplying air to the tank 9 when the stored air in the tank 9 is reduced is connected to an upper portion of the gas-liquid mixing tank 9. The pipe 17 is provided with an air valve 18 that opens and closes the pipe 17.

The microbubble nozzle 4 is set so that its water flow resistance is larger than the water flow resistance of the injection nozzle 13 of the gas-liquid mixing tank 9. By setting the flow resistance to be larger than the flow resistance 13, the inside of the gas-liquid mixing tank 9 can be maintained in a pressurized state. The microbubble nozzle 4 of this embodiment includes a porous body, and a gas-liquid mixed water stream in which air is dissolved is vigorously collided with the porous body from the nozzle to be discharged into the bathtub 1 so as to discharge the bathtub water. The air dissolved in the water is deposited to generate a large amount of fine bubbles.

The jet nozzle 3 has a venturi structure, and one end of a suction pipe 19 for sucking air by the generated negative pressure is connected to the jet nozzle 3. The end is connected to a discharge port of the gas-liquid mixing tank 9, and a suction valve 19 is provided with a drain valve 20.

Next, the operation of the above bathtub system will be described. First, in the operation in the fine bubble mode, the air valve 1 is used.
8 and the drain valve 20 are closed and the three-way valve 11
Selects the circulation path 10b on the side of the fine bubble nozzle 4, and when the circulation pump 8 is driven, the bathtub water is drawn out of the bathtub 1 into the circulation path 10 as shown by the arrow. Is introduced into the gas-liquid mixing tank 9 through the three-way valve 11.

In the gas-liquid mixing tank 9, the bath water is
The injection nozzle 13 is pressurized by the circulation pump 8 and
As a result, the air is violently collided with the current plate 14 in the gas-liquid mixing tank 9, and the stored air in the gas-liquid mixing tank 9 is entrained. As the required time elapses, the gas flows out from the outlet on the bottom surface of the gas-liquid mixing tank 9 to the circulation path 10b, but is gradually stored in the gas-liquid mixing tank 9 due to the balance between the amount of bathtub water introduced and the amount of outflow. Will be. When the bathtub water is stored in this manner, the bathtub water introduced from the injection nozzle 13 collides against the stored bathtub water, and the air in the gas-liquid mixing tank 9 is entrained. Therefore, a large amount of air is dissolved in the stored bath water.

In this way, a large amount of air is dissolved in the bath water in the gas-liquid mixing tank 9, and the bath water flowing out of the gas-liquid mixing tank 9 is supplied from the fine bubble nozzle 4 to the bath 1. It is blown out inside and decompressed. When the bathtub water is returned into the bathtub 1, the pressure applied to the bathtub water is released at once in the bathtub 1, so that the air dissolved in the bathtub water is deposited to generate a large amount of fine bubbles. Will do.

If there is a floating substance in the bathtub water, the floating substance efficiently floats on the surface side of the bathtub water by fine bubbles generated in a large amount in the bathtub 1 as described above. Can be At this time, by adding hot water to the bathtub 1 to slightly raise the water level of the bathtub water and opening the motor-operated valve 7 of the drain pipe 6 of the bathtub 1 accordingly, the bathtub 1 was floated to the surface side of the bathtub water. The suspended matter is discharged through the overflow drain 5 and the drain pipe 6 of the bathtub 1.

As described above, in the above bathtub system, the gas-liquid mixing tank 9 is disposed downstream of the circulation pump 8, and the bathtub water pressurized by the circulation pump 8 is jetted vigorously into the gas-liquid mixing tank 9 to internally store the gas. Since air is taken in and dissolved, it is not necessary to make the circulation pump 8 expensive and excellent in air lock resistance as in the related art, thereby contributing to a reduction in the cost of the apparatus. In addition, since air can be efficiently dissolved in bath water in the gas-liquid mixing tank 9, a large amount of fine bubbles can be generated in the bath 1.

By the way, the air in the gas-liquid mixing tank 9 is gradually dissolved in the bath water with the elapse of the operation in the fine bubble mode described above. Eventually it will be gone.

Therefore, in this embodiment, when the time in which the air in the gas-liquid mixing tank 9 decreases and the level of the bath water in the tank 9 elapses, the controller 12
Connects the three-way valve 11 to the circulation path 10 on the side of the fine bubble nozzle 4.
b to the circulation path 10a on the jet nozzle 3 side, and open the air valve 18 and the drain valve 20 to set the drain mode.

In this drainage mode, bathtub water is drawn out of the bathtub 1 into the circulation path 10 and jetted out of the jet nozzle 3 into the bathtub 1 via the three-way valve 11, as indicated by the arrow in FIG. Due to the negative pressure generated at that time, the bathtub water in the gas-liquid mixing tank 9 is sucked into the jet nozzle 3 through the suction pipe 19 and is jetted into the bathtub 1 to be drained. Air is introduced into the tank 9 from an air introduction pipe 17. That is, air is introduced at the same time as the bathtub water in the gas-liquid mixing tank 9 is drained.

When the time in which the air in the gas-liquid mixing tank 9 has increased and the level of the bath water in the tank 9 has decreased has passed, the controller 12 sets the three-way valve 11 to the fine bubble nozzle 4 side. Switching back to the circulation path 10b, the air valve 18 and the drain valve 20 are closed, the introduction of drainage and air is stopped, and the mode returns to the fine bubble mode again.

Further, when the time in which the air in the gas-liquid mixing tank 9 decreases and the level of the bath water in the tank 9 rises has passed, the controller 12 returns to the three-way valve 11.
Is switched to the circulation path 10a on the jet nozzle 3 side, and the air valve 18 and the drain valve 20 are opened to perform drainage and air introduction.

As described above, in the fine bubble mode, the drain mode is intermittently performed to drain the bath water of the gas-liquid mixing tank 9 and to introduce air.

That is, the controller 12 is preset with a time period during which the air in the gas-liquid mixing tank 9 decreases and the level of the bath water in the tank 9 rises, and the circulation path 10a on the jet nozzle 3 side. And the time from when the air valve 18 and the drain valve 20 are opened to start drainage and introduction of air to when a desired amount of air is supplied into the gas-liquid mixing tank 9 is set in advance. , The circulation paths 10a, 10
The switching of b and the opening and closing of the air valve 18 and the drain valve 20 are controlled.

As described above, when the air in the gas-liquid mixing tank 9 decreases and the air needs to be replenished with the progress of the operation in the fine bubble mode, the three-way valve 11 is moved to the jet nozzle 3.
Is switched to the circulation path 10a on the
And the drain valve 20 is opened to set the drain mode, and the bathtub water in the gas-liquid mixing tank 9 is jetted out of the jet nozzle 3 into the bathtub 1 by using the negative pressure generated in the jet nozzle 3 to drain the tank 9. Since air is introduced into the inside, air can be replenished without stopping the operation, and the operation efficiency is improved as compared with a configuration in which the operation is stopped and air is introduced.

Next, the operation in the jet mode will be described. In the jet mode operation, the air valve 18 and the drain valve 20 are opened, and the three-way valve 11 is switched to the circulation path 10a on the jet nozzle 3 side, and the circulation pump 8 is driven, so that the inside of the bathtub 1 is moved. Bath water is drawn out into the circulation path 10 and is jetted from the jet nozzle 3 into the bath 1 through the three-way valve 11. The negative pressure generated at that time causes the bath water in the gas-liquid mixing tank 9 to flow into the bath 1. And is drained at the same time. That is, the operation state is the above-described drainage mode operation state.

When the bathtub water in the gas-liquid mixing tank 9 is exhausted, the air in the gas-liquid mixing tank 9 is automatically jetted through the suction pipe 19 as shown by a broken arrow in FIG. A jet jet mixed with air sucked into the nozzle 3 is jetted into the bathtub 1 to shift to the operation in the original jet mode. That is, by continuing the above-described drainage mode, it is possible to automatically shift to the original jet mode.

Thus, not only the fine bubble mode,
You can enjoy bathing in jet mode.

(Other Embodiments) In the above-described embodiment, the mode is switched between the fine bubble mode and the drain mode based on a preset time. The two modes may be switched by detecting the level of bath water in the mixing tank with a level sensor or the like.

As another embodiment of the present invention, when switching between the fine bubble nozzle and the jet nozzle, the rotation speed range of the circulation pump may be switched according to the characteristics of each nozzle. That is, when the fine bubble nozzle is used, the circulating pump is operated in a high rotation speed region, and when the jet nozzle is used, it is operated in a low rotation speed region.

[0053]

As described above, according to the present invention, since the circulation path can be switched to the jet nozzle side or the fine bubble nozzle side by the switching means provided with the jet nozzle and the fine bubble nozzle, You can enjoy bathing in both the mode and the jet mode.

In addition, in the fine bubble mode, the reduction due to the dissolution of the air stored in the gas-liquid mixing tank is compensated for by switching to the jet nozzle side while continuing the operation of the circulation pump. It is possible to completely eliminate the stoppage of operation for replenishing air,
The operation efficiency can be greatly improved as compared with the configuration in which the operation is stopped during the period in which air is supplemented.

Further, since air is dissolved in bath water in the gas-liquid mixing tank downstream of the circulation pump, there is no need to use an expensive circulation pump having excellent air lock resistance as in the conventional example.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a bathtub system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a drainage mode of FIG. 1;

FIG. 3 is a configuration diagram showing a jet mode of FIG. 1;

FIG. 4 is a configuration diagram showing a conventional bathtub system.

FIG. 5 is a configuration diagram showing a bathtub system separately proposed by the present applicant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 3 Jet nozzle 4 Fine bubble nozzle 8 Circulation pump 9 Gas-liquid mixing tank 11 Three-way valve 12 Controller 18 Air valve 19 Suction line 20 Drain valve

Claims (3)

[Claims] 1. A circulating pump for circulating bath water in a bath tub so as to take out and return the bath water; a jet nozzle for jetting a jet jet in which air is mixed into a circulating bath water stream into the bath tub; A gas-liquid mixing tank for dissolving and passing the stored air inside the bath water provided and pressurized and introduced by the circulation pump, and a gas-liquid mixed water flow in which the air from the gas-liquid mixing tank is dissolved. A bathtub system comprising: a microbubble nozzle that generates microbubbles in a bathtub; and switching means for switching a bathtub water circulation path by the circulation pump to the jet nozzle side or the microbubble nozzle side. 2. The bathtub system according to claim 1, wherein the jet nozzle is connected to one end of a suction pipe for sucking air to be mixed into the bathtub water flow by the generated negative pressure, and the gas-liquid mixing tank is connected to the jet nozzle. The other end of the suction pipe is connected, and an air introduction pipe for introducing air into the gas-liquid mixing tank is connected, and the opening and closing of the circulation pump, the switching means, and the both pipes are controlled. The control unit includes: a control unit configured to set a circulation path of the bathtub water by the circulation pump to the microbubble nozzle side to generate fine bubbles in the bathtub, and then switch the circulation path to the jet nozzle side. The bathtub water in the gas-liquid mixing tank is discharged from the jet nozzle into the bathtub through the suction pipe and discharged therefrom, and air is introduced into the gas-liquid mixing tank. Bathtub system characterized by entering. 3. The bathtub system according to claim 1, wherein the circulation path of the bathtub water is a branched circulation path from an outlet for taking out the bathtub water to the fine bubble nozzle or the jet nozzle. The circulating pump is disposed in the middle of the circulation path from the outlet to the branch, the switching means is disposed in the branched part, and the switching means is disposed in the circulation path downstream of the switching means. A bath tub system, wherein the gas-liquid mixing tank entangles and dissolves the stored air in the bath tub water pressurized and introduced by the circulation pump, and then passes the bath while storing a part thereof.