JPH03186308A - Bathtub system - Google Patents

Abstract

PURPOSE:To prevent beads from flowing out of a bathtub during back washing by the arrangement such that a control means has a function to automatically make an air feed means inoperative after the completion of a jet mode, allowing thereby a back washing mode to be performed for a predetermined period of time. CONSTITUTION:A sequence controller 28a controls a three-way valve 13 so that a piping 12a communicates with a piping 14 and also controls a second three-way valve 17 so that a piping 16 communicates with a combined piping 18 and then actuates a circulation pump 8. Then, the water W0 in a bathtub is sucked from a suction port 2 into an upstream circulation piping 7c through the sucking force of the pump 8, whereby the bathtub water flows from the pump 8 to a branch 7d, where the water is divided into downstream circulation pipings 7a, 7b and a branched piping 10. A part of the divided water reaches a filter tank 15, wherein dirty matters in the water are removed by means of a group of beads 15c. As a result, beads are prevented from flowing out.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention cleans a portion of the bath water taken out from the bathtub through filtration, mixes it with air, and sprays it into the water in the bathtub as a jet stream for foamy pine surge. The present invention relates to a bathtub system configured to not only cause reflux but also wash a filtering means with water within the bathtub.

<Prior art> As this type of bathtub system, the applicant has developed, for example, the 4th bathtub system.
I am thinking of something like the one shown in the figure.

As shown in the figure, the bathtub 1 is provided with a suction port 2 on one side wall 1a of the opposing side walls 1a and 1b for guiding the water W in the bathtub to the outside. Two walls are provided in each of the wall portions 1a and 1b for mixing air and bathtub return water (the supply system for these will be described later) and ejecting jet streams Ja and Jb for foamy pine surge into the bathtub water W. Jet nozzles 3a and 3b are provided.

Each jute nozzle 3a, 3b has an individual air supply pipe 5.
a, 5b are connected, and a common air control valve 6 is interposed in each air supply pipe 5a, 5b.The suction port 2 and the suction side of the circulation pump 8 are connected via an upstream circulation pipe 7c. , the discharge side of the mm pump 8 and each jet nozzle 3a
, 3b are connected via downstream circulation piping 7a, 7b, respectively, and the circulation piping 7 is constituted by the upstream circulation piping 7c and the downstream circulation piping 7a, 7b. Return water control valves 9a and 9 are provided in each of the downstream circulation pipes 7a and 7b, respectively.
b is interposed.

Branch portion 7d of circulation piping 7 on the downstream side of circulation pump 8
The inlet of the steam-water separation tank 11 is connected to the branch pipe 10 from the air-water separation tank 11 , and the filtration 115 is connected to one transparent outlet of the steam-water separation tank 11 via the pipe 12 , the first three-way valve 13 , and the pipe 14 . The forward inflow side 15a is connected. The forward outflow side 15b of the filtration tank 15 is connected to the pipe 16 and the second three-way valve 1.
7 and the merging pipe 18, the upstream circulation pipe 7C between the suction port 2 and the circulation pump 8 in the circulation pipe 7
It is connected to the merging section 7e. A drain pipe 19 is connected to the first three-way valve 13, and the second three-way valve 17 and the outlet on the steam separation side of the steam/water layer tank 11 are connected via a pipe 20.

A plurality of air blow nozzles 21 are provided on the bottom wall 1c of the bathtub l, and these air blow nozzles 21 are connected to an air pump 24 for air blowing via a header 22 and an air blow piping 23, and an air blowing nozzle 21 is connected to the air blow piping 23. - A control valve 25 is interposed.

The remote control operation unit 26 includes an operation switch S+, a jet switch S3. Backwash switch S5. Air blow switch Ss, up/down key SS for adjusting jet water volume,
An amplifier down key S for adjusting the amount of jet foam, an up/down key 81 for adjusting the amount of air blow foam, and a liquid crystal display panel 27 are provided.

The sequence controller 28 controls the air control valve 6, the circulation pump 8, the reflux water@open valves 9a and 9b, and the first and second three-way valves 13 based on various commands from the remote control operation unit 26.
．． 1? , the corresponding elements of the air pump 24 and air blow control valve 25 for air blow are arranged in order. The two-dot chain line indicates their @-regulatory lineage.

In this bathtub system, the backwash mode is performed intermittently while the jet mode is being executed, in order to save the effort of running the backwash mode alone.

The operation will be explained below. However, the explanation of the air blow mode is omitted here as it is not important here.

When the operation switch S is pressed, the sequence controller 2
8 is activated.

■ Jet mode When the jet switch S8 is pressed, the jet mode is selected, and the sequence controller 28 controls the air flow valve 6 and the two-way water flow flow! Open the control valves 9a and 9b. The exit of the air control valve 6 is set by the up/down key S for adjusting the amount of jet foam, and the return water +11? ll
The relationship between the valves 9a and 9b is set by an up/down key S for adjusting the amount of jet water. In addition, the sequence controller 28 puts the first three-way valve 13 into communication between the pipes 12 and 14 based on the push operation of the jet switch S□, and connects the second three-way valve 17 to the pipe 16.
The sequence controller 28 then drives the circulation pump 8.

This causes the bathtub water to flow as shown by the solid arrow.

That is, the bathtub water W is sucked into the upstream circulation pipe 7C from the suction port 2 by the suction force of the circulation pump 8, and the bath water reaches the branch part 7d from the circulation pump 8, where it is drawn into the downstream circulation pipe 7a, The water is divided into the 7b side and the branch pipe 10 side.

Some of the bathtub water diverted to the branch pipe 10 side is
After leaving the steam/water separation tank 11 through the pipe 12
．． First three-way valve 13. The water reaches the forward inflow side 15a of the filtration tank 15 via the piping 14, and dirt contained in the bath water is removed. The clean water that has passed through the filter tank 15 is transferred from the forward outflow side 15b to the pipe 16. Second three-way valve 17, confluence pipe 1
8 to a confluence section 7e, where it joins with the bathtub water from the suction port 2 and reaches the circulation pump 8 again.

This combined water flows from the branch section 7d to the downstream circulation pipes 7a, 7.
b. The return water flows through the return water control valves 9a, 9b to both the jutsu nozzles 3a, 3b, where it is mixed with the air supplied via the air supply pipes 5a, 5b and the air control valve 6, and the water in the bathtub W0 Jet stream Ja for foamy pine surge
, is ejected as Jb.

For example, the duration of operation in jet mode is 15 minutes, but if the operation continues for 5 minutes, the sequence controller 28a automatically backwashes the filter tank 15. , - Once the jet mode is interrupted, the first three-way valve 13 is connected to the pipe 14. At the same time, the drain pipes 19 are brought into communication with each other, and the second three-way valve 17 is switched to the state where the pipes 20 and 16 are connected with each other, so that the filtration tank 1
Backwash 5. During this backwashing, the bathtub water flows as indicated by the broken line arrow, removes dirt accumulated in the filter tank 15, regenerates the filter tank 15, and drains the bathtub water containing dirt through the drain pipe 19.

Even during such backwashing, bathers can
, Jb, the air MII valve 6 and return water@seed valves 9a, 9b are on the open side.

The backwashing operation will be explained in detail in the next section (2) backwashing mode operation.

This backwashing is performed for one minute, and when it is finished, the jet mode is returned to.

As described above, while a part of the bath water taken out from the bathtub 1 is purified by filtration, it is mixed with air to form a jet stream Ja for foamy pine surge.

Jb is jetted back into the bathtub water W, and the filtration 1115 is backwashed at regular intervals. Note that if the jet switch S is pressed again, the circulation pump 8 will stop. Even if you do not press the button, jet mode operation will continue for a limited time (
15 minutes), the circulation pump 8 automatically stops.

■ Backwash mode This backwash is performed manually.

When the backwash switch S is pressed, the backwash mode is selected, and the sequence controller 28 fully closes the air control valve 6 and connects the first three-way valve 13 to the pipe 14. After bringing the drain pipes 19 into communication with each other and bringing the second three-way valve 17 into communication with the pipes 20 and 16, the circulation pump 8 is driven.

As a result, the bathtub water flows as shown by the dashed arrow.

That is, the bathtub water W is sucked into the upstream circulation piping 7c from the suction port 2 by the circulation pump 8, and the bathtub water reaches the air-water separation tank 11 from the circulation pump 8 via the branch section 7d2 and the branch piping 1O, and then flows into the bathtub. After the air bubbles contained in the water are removed, the pipe 20. Second three-way valve 17. Piping 16
flows in the opposite direction to the filtration tank 15 through the filtration tank 1.
Remove the dirt accumulated in 5, regenerate the filtration 5ets, and drain the bathtub water containing dirt to the pipe 14. First three-way valve 13. Discharge via drain pipe 19. Some of the bath water is ejected from jet nozzles 3a and 3b.

Note that when the backwash switch S is pressed again, the circulation pump 8 is stopped. Even if you do not press the button, the circulation pump 8 will turn off once the operation continuation time (15 minutes) in backwash mode has elapsed.
will stop automatically.

■ Backwash mode during jet mode operation When the backwash switch S is pressed during jet mode operation, the backwash mode is selected, and the filter tank 15 is backwashed in the same manner as described above, and the filter tank 15 is
minutes), it will return to its original jet mode.

However, in this interruptive backwash mode during jet mode operation, the bather is in the jet flow Ja.

Air control valves 6a, 6 so that Jb can be applied
b and the return water control valves 9a and 9b are left open.

<Problems to be Solved by the Invention> In the bathtub system described above, it is necessary to manually operate the backwash switch S during the intermittent backwash operation that is automatically performed during the execution of the jet mode, or during the execution of the jet mode. During the interruptive backwash operation, the bathtub water mixed with air bubbles due to the jet flows Ja and Jb is taken out from the suction port 2.
5, it was necessary to interpose a steam/water layer tank 11 between the two.

If the air-water separation tank 11 is not interposed, the air bubbles mixed in the backwash water will lift the beads (not shown) that are the filtration material filled in the filtration tank 15. Beads flow out from the drain pipe 19,
In order to prevent this, a steam/water separation tank 11 was required to remove air bubbles from the backwash water.

However, the presence of the steam/water layer tank 11 increases the size and cost of the bathtub system.

The present invention was devised in light of these circumstances.
The aim is to prevent beads from forming in the filtration tank during backwashing, while eliminating the need for a steam/water separation tank.

<Means for Solving the Problems> In order to achieve such an object, the present invention provides a jet mode in which air is mixed into the bathtub water taken out from the bathtub using an air supply means and returned to the bathtub, and a jet mode in which water taken out from the bathtub is mixed with air and returned to the bathtub. a filtration mode in which the water in the bathtub is mixed into the filtration means from the forward direction and returned to the bathtub while being purified; and a filtration mode in which the water in the bathtub taken out from the bathtub is mixed in the filtration means in a direction opposite to that in the filtration mode. A bathtub system having a 1111111 means for executing a backwash mode in which the water flows in from the water, washes the filtering means, and then discharges the water, has the following configuration.

In the bathtub system of the present invention, when the jet mode is executed, the control means has a function of automatically inactivating the air supply means and executing the backwash mode for a predetermined period of time after the end of the jet mode. It is characterized by the fact that

(Operation) The jet mode is executed not only independently, but also in combination with the filtration mode.In other words, as explained in the conventional example, the jet nozzle cleans the bath water while providing a jet flow from the jet nozzle. It is possible to make it squirt.

In addition, in the backwash mode, since the air supply means is inactive, air bubbles are not mixed in the backwash water for the filtration means, so that the beads in the filtration means are not flowed out of the drain pipe by the backwash water. There is no need to worry.

In the present invention, especially when the jet mode ends, the backwash mode is automatically continued for a predetermined period of time, so there is no need to take the trouble to perform an operation to execute the backwash mode. .

In this way, when running the backwash mode, be sure to avoid generating a foamy jet flow into the water in the bathtub, so that the water in the bathtub does not contain air bubbles. Even if not used, the outflow of beads within the filter means will be avoided.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

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

In the figure, 1 is a bathtub, la and lb are opposing side walls of the bathtub l, lc is a bottom wall, 2 is a suction port, and 3a.

3b is a jet nozzle, 5a and 5b are air supply pipes, 6
is an air mm valve, 7 is a circulation pipe, 7a and 7b are downstream circulation pipes, 7C is an upstream circulation pipe, 7d is a branch part, 7e is a confluence part, 8 is a circulation pump, 9 a + 9b is reflux water 111
1111 valve, lO is branch piping, 13 is first three-way valve, 1
5 is a filter tank, 17 is a second three-way valve, 18 is a confluence pipe, 1
9 is a drain pipe, 21 is an air blow nozzle, 22 is a header,
23 is an air blow pipe, 24 is an air pump for air blow, 25 is an air blow mm valve, 26a is a remote control operation unit, 27a is a liquid crystal display panel, 28a is a sequence controller, Ja, Jb are jet streams, and W is inside the bathtub. It's water. These configurations are the same as those of the conventional example explained in FIG. 4 except for the remote control operation section 26a and the sequence controller 28a, so the same reference numerals are given here and the explanation will be omitted. Note that the air supply pipes 5a, 5
b and the air control valve 6 correspond to the air supply means described in the claims, and the sequence controller 28a corresponds to the control means described in the claims.

The configurations of this embodiment that differ from the conventional example are as follows.

That is, the steam/water separation tank 11, which was essential in the conventional example, has been abolished, and the branch pipe 10 and the confluence pipe 1B are connected in parallel to the circulation pipe 7 and the circulation pump 8.
A backwashing bypass pipe 20a is provided between the pipe 12a (discharge side of the circulation pump 8) and the filtration tank 15 extending from the connection point 10a between the branch pipe IO and the backwashing bypass pipe 20a. Piping 14 and drain pipe 1 on the inflow side 15a
A first three-way valve 13 is interposed between the pipe 16 on the forward outflow side 15b of the filtration tank 15, the merging pipe 18 (the suction side of the I-ring pump 8), and the backwashing bypass pipe 20a. A second three-way valve 17 is interposed therebetween, and the filtration tank 15 is connected in parallel to the backwashing bypass pipe 20a. The filter tank 15 is filled with beads 15c.

The remote control operation unit 26a has a liquid crystal display panel 27a, and also has an operation key KI, an air blow key Kz,
3. on the jet key. Air blow foam volume selection key Ka, jet water volume selection key %, jet water volume selection key Kh
and a backwash key.

Air blow foam volume switching key Ka, jet water volume switching key K
S and the jet foam amount switching key are used to switch the foam amount or water amount into three levels. Switching between these three stages or three states is performed by the sequence controller 2.
For example, 0 is performed by up-counting and resetting the 2-pin counter in 8a.
When you press the jet water volume switch key once, the count value switches from the initial value (0, 0) to (0, 1) and the high water volume mode is selected, and when you press it twice, the count value changes to [1°0]. Then, the medium water mode is selected, and when the button is pressed three times, the counter is counted and the initial value (0,0) is set to select the low water mode.

The sequence controller 28a is a remote control operation section 26
Based on the operations of various keys 1 to 7 in a, the air control valve 6, circulation pump 8, return water control valves 9a, 9b,
1st. Corresponding elements among the second three-way valve 13, 17, the air pump 24 for air blow, and the air blow control valve 25 are sequentially controlled.

The operation will be explained below.

When + is pressed on the operation key, the sequence controller 28a
is activated.

[1] Jet mode Press 3 on the jet key to select jet mode.
The sequence controller 28a opens the air control valve 6 and both return water control valves 9a and 9b. The opening amount of the air control valve 6 can be switched to three levels depending on the number of times the jet foam/snow switching key Kh is pressed.
The opening of the molds a and 9b can be switched to three stages depending on the number of times the jet water amount switching key is pressed.

Next, the sequence controller 28a brings the first three-way valve 13 into communication between the pipes 12a and 14, and after bringing the second three-way valve 17 into a state where the pipes 161 and merging pipe 18 are connected, the sequence controller 28a turns the circulation pump 8 on. drive

Then, as shown by the solid arrow, the water in the bathtub W.

is sucked into the upstream circulation pipe 7C from the suction port 2 by the suction force of the circulation pump 8, and the bath water reaches the branch part 7d from the circulation pump 8, where it is transferred to the downstream circulation pipes 7a and 7b.
and the branch pipe lO side.

Some of the bath water diverted to the branch pipe 10 side is transferred to the pipe 12.
a. First three-way valve 13. It reaches the filtration tank 15 from the forward inflow side 15a of the filtration tank 15 via the piping 14, and the filtration tank 15
By flowing in the forward direction, dirt contained in the bath water is removed by the beads 15c. Filtration tank 15
The clean water that has passed through is transferred from the forward outflow side 15b to the pipe 16.
Second three-way valve 17. It reaches the merging section 7e via the merging pipe 18, where it joins with the bathtub water from the suction port 2 and reaches the circulation pump 8 again.

The bathtub water from the suction port 2 and the clean water are then transferred to the downstream circulation pipes 7a, 7b and the return water control valve 9.
a, 9b to both jet nozzles 3a, 3b, where it is mixed with the air supplied via the air supply pipes 5a, 5b and the air control valve 6, and the water in the bathtub W
, it is ejected as Jeft flow Ja, Jb for foam muff surge.

The continuous operation time in the jet mode is 15 minutes, and the intermittent backwashing of the filtration tank 15 as in the conventional example is not performed during this continuous operation time. After the time has expired or after pressing 3 on the Jet key again to stop Jet mode operation.

The sequence controller 28a uses a built-in timer to
The operating time is counted during the jet mode operation, and when the end or stop of the jet mode operation is detected, the operating time T up to that point is stored. and,
Calculate the backwash time T■9 by dividing the operating time T by 5 (
T□v-T・75)0 For example, when the operating time T is 10 minutes, the backwash time Tl1ffiv is 2 minutes, and when the operating time T is 5 minutes, the backwash time T□ is 1 minute. Become.

As shown in the time chart of FIG. 2, the sequence controller 28a closes the first three-way valve 13 to the pipe 14 on the forward inflow side 15a of the filtration tank 15 when the jet mode operation ends or stops. The drain pipes 19 are brought into communication with each other, the second three-way valve 17 is switched to the state where the backwashing bypass pipe 20a and the pipe 16 on the forward outflow side 15b are brought into communication with each other, and the air l control valve 6 is fully closed. do.

Then, a portion of the bathtub water from the circulation pump 8 flows into the branch pipe 10. as shown by the broken line arrow. Bypass piping 20a for backwashing
, second three-way valve 17. It flows in the reverse direction through the filtration tank 15 from the forward outflow side 15b of the filtration tank 15 to the forward inflow side 15a through the piping 16, backwashing the filtration tank 15, and cleaning the filtration tank 1.
Wash away the dirt trapped by beads 15c in 5,
Piping 14. First three-way valve 13. It is discharged to the outside via the drain pipe 19.

In this case, the air control valve 6 is fully closed and the water in the bathtub W
Shared flow Ja containing air bubbles for 8.

Since Jb is not present, the backwash water sent from the circulation pump 8 to the filtration tank 15 does not contain air bubbles, and therefore the beads 15c in the filtration tank 15 are not washed out by the backwash water. thwarted. That is, even if the steam/water separation tank 11 is abolished, it is possible to prevent the beads 15c from flowing out in the filtration tank 15.

As shown in Figure 2, after 10 minutes of jet mode operation, press 3 on the jet key again to stop jet mode operation (T□-10 in), backwashing will be performed for 2 minutes (T□□- 2m1n), then press the jet key again to resume jet mode operation.
After a minute, press the jet key again to stop (
T□-5m1n), backwashing is performed for 1 minute (T□.

-1 ain) *Duration of operation in jet mode (
In this case, backwashing is performed for 3 minutes (T□.-3m1n).
*In other words, since the degree of contamination in the filter tank 15 is proportional to the jet mode operation time T, by backwashing for a time TltV proportional to the degree of contamination, the contamination can be rationally removed and the filtration tank 15 can be cleaned. It is being regenerated.

Since backwashing of the filtration tank 15 is performed each time the jet mode operation is finished or stopped, the filtration tank 15 can always be kept in a clean state.

Note that during backwashing in the jet mode described above, the return water control valves 9a and 9b are open, so some of the bathtub water flows back from the jet nozzles 3a and 3b to the bathtub water W0.

By the way, when operating in jet mode rather than during backwashing, by fully closing one of the air control valves 6 and fully closing the corresponding one of the two-speed flow water control valves 9a and 9b, One jet nozzle 3a or 3
It is also possible to eject the jet stream Ja or Jb only from the stream b.

In addition, during backwashing following the end of jet mode operation,
The double-speed flow water control valves 9a and 9b may be fully closed or throttled to increase the flow rate of backwash water to the filtration tank 15, thereby increasing the efficiency of backwashing.

[2 Conia Blow Mode When the air blow key Kl is pressed, the air blow mode is selected, and the sequence controller 28a opens the air blow control valve 25. The open type of the air blow control valve 25 is as follows:
The air blow rate can be switched to three levels depending on the number of times you press 4 on the bubble volume switch key.

In this case, the control performed by the sequence controller 28a is the same as in the conventional example, so the explanation will be omitted.

The duration of operation in air blow mode is 15 minutes.

Note that the jet mode and air blow mode can be executed at the same time.

[3] Backwash mode during jet mode operation As shown in the time chart in Figure 3, if you manually press the backwash key during jet mode operation, jet mode will be interrupted and backwash mode will be interrupted. , the sequence controller 28a causes the air control valve 6 to be set to the backwash key K.

Fully close at the same time as the operation.

Then, wait for the time t (5 seconds) required for the air bubbles in the water W0 in the bathtub to escape.

lapses, the sequence controller 28a controls the first
The three-way valve 13 is placed in communication with the pipe 14 on the forward inflow side 15a of the filtration tank 15 and the drain pipe 19, and the second three-way valve 17 is placed in communication with the backwashing bypass pipe 20a and the forward outflow of the filtration tank 15. At the same time, the two-speed flow water control valves 9a and 9b are fully closed. After this, backwash time T++! Backwash for ve (1 minute).

The flow of backwash water is the same as described above, and the filter tank 15 is backwashed and regenerated, and the bathtub water containing dirt is discharged to the outside via the drain pipe 19. In this case as well, since there are no jet streams Ja and Jb containing air bubbles against the water W in the bathtub and no air bubbles are mixed in the backwash water, the beads 15 in the filtration tank 15
c is prevented from flowing out by backwash water. Therefore, the steam/water separation tank 11 can be abolished.

Backwash time T□9. When the (1 minute) backwashing is completed,
The sequence controller 28a includes the first three-way valve 13.
The second three-way valve 17 is returned to its original state, and both air control valves 6a, 6b and both speed flow water control valves 9a, 9b are opened to return to the original jet mode.

During backwashing during this jet mode operation, the double-speed flow water control valves 9a and 9b are fully closed, so all of the bathtub water from the circulation pump 8 flows back through the filtration tank 15 as backwash water. Therefore, backwashing efficiency is high. However, if you are not concerned about backwashing efficiency, dual-speed flow water li
The IIwI valves 9a and 9b may be on the open side.

In this case, backwashing is left to the user's manual operation, so if backwashing is not performed for a long time, there is a risk that the filter tank 15 will become contaminated beyond its limit. Therefore, for example, if the cumulative value of the flow rate flowing into the filtration tank 15 is counted, and when the count reaches a certain value, a display prompting backwashing is displayed on the liquid crystal display panel 27. It is possible to prevent clogging.

<Effects of the Invention> As explained above, according to the present invention, after the end of the shared mode operation, the air supply means is automatically deactivated and the backwash mode is performed. To prevent air bubbles from being mixed into the backwash water for the filtration tank and to prevent the beads in the filtration tank from flowing out of the drain pipe due to the backwash water, unlike the conventional example where the backwash mode is performed intermittently. I can do it.

In this way, it is possible to eliminate the conventionally indispensable steam/water separation tank while saving the user's effort and effort, and it is possible to achieve miniaturization and cost reduction of the bathtub system.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a bathtub system according to the present invention, and FIG.
The figure is a time chart for explaining the first operation, and FIG. 3 is a time chart for explaining the second operation. Moreover, FIG. 4 is a schematic configuration diagram of a bathtub system according to a conventional example. l... Bathtub, 5a, 5b... Air supply piping, 6... Air control valve, 15... Filtration tank, 15a... Forward inflow side of the filtration tank, 15b... Of the filtration tank Forward outflow side, 28a...Sequence controller.

Claims (1)

[Claims] (1) A jet mode in which the water in the bathtub taken out from the bathtub is mixed with air by an air supply means and returned to the bathtub, and a jet mode in which the water in the bathtub taken out from the bathtub is flowed from the forward direction into the filtration means to purify the bathtub. a filtration mode in which the bathtub water taken out from the bathtub is flowed into the filtration means from the opposite direction to that in the filtration mode to wash the filtration means and then discharged. A bathtub system having a control means, wherein when the control means executes the jet mode, the control means automatically deactivates the air supply means and executes the backwash mode for a predetermined period of time after the end of the jet mode. A bathtub system characterized by having functions.