JPH0453527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a bathtub system equipped with a shoulder full nozzle that applies hot water to the shoulders of a bather to perform massage while warming the body.

<Conventional technology> Conventional bathtub systems have a shoulder full nozzle at the top of the side wall of the bathtub and a jet nozzle at the bottom of the side wall. There is a device in which the whole body can be massaged with foamy water spouted from a jet nozzle (see, for example, Japanese Patent Laid-Open No. 59-222118).

<Problems to be Solved by the Invention> In such a conventional bathtub system, at the initial stage of starting the shoulder bath, the cold water remaining in the pipes spills out and directly hits the shoulders of the bather, causing discomfort. There is a problem. In other words, when performing a shoulder full, the connection is switched from the jet piping that supplies hot water to the jet nozzle to the shoulder piping that supplies hot water to the shoulder full nozzle using a switching valve. The remaining cold water inside is pushed out and squirts out of the shoulder fall nozzle, which ends up on the shoulders of the bather.

As a countermeasure, for example, a switching valve may be provided near the jet port of the shoulder full nozzle, thereby shortening the path from the switching valve to the jet port as much as possible, thereby reducing the amount of cold water stored.

However, if a large number of control parts for switching mechanisms such as switching valves are provided in a bathtub, there is a problem that handling becomes troublesome in terms of maintenance and management in the event of a failure.

<Means for Solving the Problems> The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent the initial gush of cold water when starting the shoulder bath so that bathing can always be done comfortably. It is something to do.

Therefore, in the present invention, a shoulder nozzle for shoulder pad pine surge is provided in the upper part of the bathtub, and a jet nozzle for foam pine surge is provided in the lower part of the side wall of the bathtub, while hot water drawn up from the bathtub by a circulation pump is provided. a shoulder piping path for guiding water to the shoulder full nozzle; and a jet piping path for guiding hot water from the circulation pump to the jet nozzle; A bathtub system in which a switching valve is provided at a branching portion has the following configuration.

That is, in the first invention, a suction pipe for generating negative pressure is formed between the jet pipe and the shoulder pipe, and the suction pipe is connected to the jet pipe and the shoulder pipe to communicate with each other. A control signal that starts the pump and switches the switching valve to a position where it communicates with both the jet piping path and the shoulder piping path, and after a predetermined period of time, switches the switching valve to the position where it communicates with the shoulder piping path and closes the jet piping path. Equipped with a sequence controller that outputs.

In the second invention, a drainage piping path is branched from the middle of the shoulder piping path, and a drainage valve is attached to the drainage piping path, and the drainage valve is opened in response to a shoulder full mode setting switch operation.
It includes a sequence controller that outputs a control signal that closes the drain valve and starts the circulation pump after a predetermined period of time has elapsed.

In the third invention, the shoulder piping path is provided with a water flow control means, and the circulation pump is activated in response to the shoulder full mode setting switch operation, and the water flow control means reduces the amount of water supplied, and after a predetermined period of time has elapsed. It is equipped with a sequence controller that outputs a control signal that later supplies a set amount of water.

In the fourth aspect of the invention, a leak path is provided to constantly supply a small amount of hot water from the circulation pump to the shoulder piping path, and the switching valve is connected to the jet piping path and the shoulder piping path in response to the operation of the jet mode setting switch. At the same time, in response to the operation of the shoulder full mode setting switch, the switching valve is switched to a position where only the shoulder piping path is communicated with and the jet piping path is closed, and the circulation pump is activated. The system is equipped with a sequence controller that outputs control signals.

<Operation> In the first invention, the cold water remaining in the shoulder piping is removed by the negative pressure generated between the jet piping and the shoulder piping before starting the shoulder fall.

Moreover, in the second invention, cold water remaining in the shoulder piping path is removed in advance via the drain valve.

In the third invention, cold water is discharged into the bathtub from the shoulder full nozzle in an amount that does not hit the shoulders of the bather, and then is replaced with warm water.

In the fourth aspect of the invention, hot water always flows through the shoulder piping path during bathing, regardless of the presence or absence of the shoulder wall, so the water does not become cold.

Therefore, in any of the above-mentioned inventions, hot water is spouted out immediately after starting the shoulder shower, so that the user can always take a comfortable bath.

<Example> Example 1 FIG. 1 is a configuration diagram of a bathtub system according to an example of the first invention. In the figure, 1 indicates the entire bathtub system, 2 is a bathtub, and this bathtub 2
A shoulder full nozzle 4a for shoulder pad pine surge is located at the top of one side wall 2a of the side wall 2a.
At the bottom is a jet nozzle 6 for foam pine surge.
are provided for each.

10 is a circulation pump, 12 is a suction piping path of the circulation pump 10, and 14 is a delivery piping path of the circulation pump 10. 16 is a shoulder piping path that guides hot water sent from the circulation pump 10 to the shoulder full nozzle 4a;
Reference numeral 18 denotes a jet piping path that guides the hot water sent from the circulation pump 10 to the jet nozzle 6. Also, 20
22 is an air pump that sends out compressed air, and 22 is a jet nozzle 6 that receives compressed air from the air pump 20.
This is an air piping path that leads to. A suction piping passage 24 for generating negative pressure is formed between the air piping passage 22 and the shoulder piping passage 16 and communicating the two. The diameter of this suction piping path 24 is set to be slightly smaller than that of the air piping path 22.

As shown in FIG. 2, the shoulder full nozzle 4a includes an inner cylinder 26 and an outer cylinder 28, and filters 30 are attached to both ends of the inner cylinder 26, and one end of the inner cylinder 26 is attached to the bathtub. It opens in the side wall 2a, and one end of the shoulder piping path 16 is connected to the other end of the inner cylinder 26.
A slit 32 is formed on the outer periphery of 6.
One end of the suction piping path 24 is connected to the outer cylinder 28 .

On the other hand, a switching valve (a three-way valve in this example) 34a is provided at a branching portion where hot water sent from the circulation pump 10 branches into a shoulder piping path 16 and a jet piping path 18. As shown in FIG. 3, the three-way valve 34a has a switching block 36 formed with a large-diameter priority discharge passage 36a and a narrow-diameter leak discharge passage 36b. 38 and 39 are air piping paths 22
An air solenoid valve for opening and closing, 40 is an operation panel provided in the bathroom, and has setting switches (both not shown) for shoulder full mode using shoulder full nozzle 4a and jet mode using jet nozzle 6. It is located. 4
2a controls on/off of the circulation pump 10 and air pump 20, switching of the three-way valve 34a, and on/off of the solenoid valves 38 and 39 in response to the operation of each setting switch provided on the operation panel 40. It is a sequence controller that performs each.

Next, in the bathtub system 1 having the above configuration, the control operation of each part when performing a shoulder fall will be explained with reference to the timing chart shown in FIG. 4.

In the jet mode in which the jet nozzle 6 is used alone for bathing, the sequence controller 42a
As a result, the three-way valve 34a is switched to the state shown in FIG. Therefore, the air supplied from the air pump 20 through the air piping 22 and the hot water supplied from the circulation pump 10 through the three-way valve 34a and the jet piping 18 are mixed at the jet nozzle 6, and the bathtub 2 is mixed. It is squirted inside.

From this jet mode state, when the shoulder full mode setting switch provided on the operation panel 40 is operated, the sequence controller 42a first gives a switching signal to the three-way valve 34a and switches the three-way valve 34a to the position shown in FIG. Switch to the state shown in b. In this state, the priority discharge path 36
a is connected to the jet pipe line 18, and the leak discharge path 36b is connected to the jet pipe line 18.
open to the shoulder piping path 16, so
The delivery line 14 communicates with both the jet line 18 and the shoulder line 16. moreover,
The sequence controller 42a is the air solenoid valve 3
8 and 39, and start the circulation pump 10 and air pump 20.

As a result, after the hot water in the bathtub 2 is sucked up by the circulation pump 10 via the suction piping 12,
It is sent out from the delivery piping 14 to the jet piping 18 and the shoulder piping 16 via the three-way valve 34a, respectively. In this case, the priority discharge passage 36a faces the jet piping 18, so a large amount of water flows, and the shoulder piping 16 faces the leak discharge passage 36b, so a small amount flows. And shoulder piping path 1
The hot water that has flowed into the shoulder pipe 16
Pour the remaining cold water into the shoulder fill nozzle 4a.
Gradually push it towards. On the other hand, air pump 2
The compressed air from
2. It is delivered to the jet nozzle 6 via the solenoid valve 39. At that time, since the inside of the suction piping 24 becomes negative pressure, the cold water remaining in the shoulder piping 16 is
It flows out from the inner cylinder 26 of the shoulder full nozzle 4a through the slit 32 into the outer cylinder 28, and is further delivered to the jet nozzle 6 through the suction pipe line 24. As a result, the cold water remaining in the shoulder piping 16 is mixed with the air supplied from the air piping 22 and the hot water supplied from the jet piping 18 at the jet nozzle 6, and the cold water is mixed into the bathtub 2.
It is squirted inside. Since the amount of cold water mixed is small compared to the amount of hot water in the bathtub, the drop in water temperature is slight, and since the cold water is gradually discharged from the shoulder piping path 16, the jet nozzle 6
A large amount of cold water will not suddenly come out.

In this way, when the time required for the cold water remaining in the shoulder pipe line 16 to be completely replaced with hot water (the period indicated by the symbol _T0 in FIG. 4), the sequence controller 42a next controls the circulation pump 10. is temporarily stopped and the three-way valve 34a is switched to the state shown in FIG. 3c. In the state shown in FIG. 3c, the delivery pipe line 14 communicates only with the shoulder pipe line 16. Therefore, next, when the circulation pump 10 is restarted by the sequence controller 42a and the air solenoid valve 39 on the side closer to the jet nozzle 6 is closed, the hot water sent out from the circulation pump 10 flows through the three-way valve. 34a, shoulder piping path 16
Compressed air from the air pump 20 is supplied to the shoulder full nozzle 4a via an air piping path 22 and a suction piping path 24. Therefore,
In the shoulder shower nozzle 4a, hot water and air are mixed to form foamy water, which is sprayed onto the shoulders of the bather.

In the above embodiment, the air pump 20 is used to remove the cold water remaining in the shoulder piping 16 by the negative pressure generated by the compressed air flowing through the air piping 22.
0 is omitted, the suction piping 24 is directly connected to the shoulder piping 16, and the pressure inside the suction piping 24 is made negative by the water pressure jetted from the circulation pump 10 to the jet nozzle 6 via the jet piping 18. , the cold water in the shoulder pipe line 16 can also be removed. In this case, hot water is simply spouted from the shoulder nozzle 4a instead of foamy hot water. In addition, jet nozzle 6
The side air solenoid valve 39 can be omitted.

Note that in normal conditions when the shoulder full nozzle 4a and jet nozzle 6 are not used, the three-way valve 34
a is set in the state shown in FIG. 3b, so that when the hot water in the bathtub 2 is drained, the hot water in the shoulder piping 16 and the jet piping 18 are also drained at the same time and remain. Since there is no ice, it is possible to prevent the inside of each piping path 12, 16, 18 from freezing in winter.

Embodiment 2 FIG. 5 is a block diagram of a bathtub system according to an embodiment of the second invention. In this Example 2, Example 1
Compared to the case of , the following points are different in terms of configuration.
First, the suction pipe 24 is omitted, and the shoulder full nozzle 4b has a structure that only discharges hot water, and a drainage pipe 44 is branched from the middle of the shoulder pipe 16, and A drain valve 46 is attached. Furthermore, the three-way valve 34b is not formed with a thick preferential discharge passage 36a and a narrow leakage discharge passage 36b as shown in FIG. 3, but is formed so that both discharge passages have the same diameter. . Furthermore, the air solenoid valve 39 on the side closer to the jet nozzle 6 is omitted. In addition, the drain valve 46 is opened in response to the operation of the shoulder full mode setting switch on the operation panel 40,
A sequence controller 42b is provided that closes the drain valve 46 and starts the circulation pump 10 after a predetermined period of time has passed. Other configurations are in Example 1
The same is true for .

Next, in the bathtub system having the above configuration, the control operation of each part when performing a shoulder fall will be explained with reference to the timing chart shown in FIG. 6.

When the shoulder full mode setting switch provided on the operation panel 40 is operated, in response, the sequence controller 42b first gives a switching signal to the three-way valve 34b, and the three-way valve 34
b to the state shown in FIG. 3c. In this state, the delivery piping path 14 communicates with the shoulder piping path 16. At the same time, the sequence controller 42b
opens the drain valve 46. In this case, circulation pump 1
0 remains stopped. As a result, the cold water remaining in the shoulder pipe line 16 is discharged to the outside via the drain pipe line 44 and the drain valve 46.

In this way, the time required for the cold water remaining in the shoulder piping line 16 to be completely drained (the number shown in FIG.
When the period indicated by _T1 has elapsed, the sequence controller 42b then closes the drain valve 46 while starting the circulation pump 10. Therefore, the hot water sent out from the circulation pump 10 is controlled by the three-way valve 34b,
The hot water is supplied to the shoulder nozzle 4b via the shoulder piping 16, and the hot water is sprayed onto the shoulders of the bather.

Embodiment 3 This embodiment relates to the second invention, and its basic configuration is the same as that of the second embodiment, but the control operation by the sequence controller 42c is different. That is, in the second embodiment described above, the cold water in the shoulder piping path 16 is drained before the start of the shoulder fall, but in this third embodiment, the inside of the shoulder piping path 16 is drained at the end of the shoulder fall. be.

The control operation of the sequence controller 42e will be explained below based on the timing chart of FIG.

Except for the shoulder full mode, the drain valve 46 is always open, and therefore no cold water remains in the shoulder piping 16. From this state,
Next, when the shoulder full mode setting switch on the operation panel 40 is operated, the sequence controller 42e first closes the drain valve 46 and switches the three-way valve 34b to the state shown in FIG. 3c. Thereby, the delivery piping path 14 communicates with the shoulder piping path 16. At the same time, the sequence controller 42e starts the circulation pump 10. As a result, the hot water sent from the circulation pump 10 is transferred to the shoulder piping path 16 via the three-way valve 34b.
sent within. Then, the shoulder piping path 1 is
6. Fill with hot water. As a result, shoulder piping path 1
6 is preheated.

Then, when a predetermined preheating time (period indicated by the symbol _T2 in FIG. 7) has elapsed, the sequence controller 42e stops the circulation pump 10 and connects the three-way valve 34b to the jet pipe shown in FIG. 3a. After switching to the state where it communicates with the shoulder pipe line 18, the drain valve 46 is opened to drain the water in the shoulder pipe line 16.

Subsequently, the sequence controller 42e
closes the drain valve 46 and closes the three-way valve 34b.
is switched to the state shown in FIG. 3c. In the state shown in FIG. 3c, the delivery pipe line 14 communicates only with the shoulder pipe line 16. Further, the sequence controller 42e starts the circulation pump 10. Thereby, the hot water sent out from the circulation pump 10 is supplied to the shoulder full nozzle 4b via the three-way valve 34b and the shoulder piping 16, and this hot water is sprayed onto the shoulders of the bather.

Embodiment 4 FIG. 8 is a configuration diagram of a bathtub system according to an embodiment of the third invention. In this Example 4, Example 1
Compared to the case of , the following points are different in terms of configuration.
First, the suction piping 24 is omitted, the shoulder full nozzle 4b has a structure that only discharges hot water, and the air solenoid valve 39 on the side closer to the jet nozzle 6 is omitted. In addition, the three-way valve 34
a corresponds to the flow rate control means in the claims, and in addition to this, the circulation pump 10 is started in response to the shoulder full mode setting switch operation on the operation panel 40, and the flow rate control means reduces the amount of water supplied. It is provided with a sequence controller 42c that outputs a control signal to control and supply a set amount of water after a predetermined period of time has elapsed. The other configurations are the same as in the first embodiment.

Next, in the bathtub system having the above configuration, the control operation of each part when carrying out a shoulder fall will be explained with reference to the timing chart shown in FIG. 9.

When the shoulder full mode setting switch provided on the operation panel 40 is operated, the sequence controller 42c first selects the three-way valve 34a.
A switching signal is applied to switch the three-way valve 34a to the state shown in FIG. 3b. In this state, the priority discharge port 36a opens to the jet piping path 18 and the leak discharge port 36b opens to the shoulder piping path 16, so that the delivery piping path 14 communicates with both the jet piping path 18 and the shoulder piping path 16. become.
Furthermore, the sequence controller 42a simultaneously starts the circulation pump 10.

As a result, after the hot water in the bathtub 2 is sucked up by the circulation pump 10 via the suction piping 12,
It is sent out from the delivery piping 14 to the jet piping 18 and the shoulder piping 16 via the three-way valve 34a, respectively. In this case, the priority discharge port 36a faces the jet pipe line 18, so a large amount of water flows, and the shoulder pipe line 16 faces the leak discharge port 36b, so a small amount flows. And shoulder piping path 1
The hot water that has flowed into the shoulder pipe 16
Pour the remaining cold water into the shoulder fill nozzle 4b.
Gradually push it towards. Finally, this cold water is discharged from the shoulder full nozzle 4b, but since the amount of water per unit time in this case is small, it does not hit the bather's shoulders as shown by the tenth broken line. It falls along the side wall 2a. Furthermore, since the amount of cold water mixed with hot water is small compared to the amount of hot water in the bathtub, the drop in the temperature of the hot water is slight.

In this way, when the time required for the cold water remaining in the shoulder piping path 16 to be discharged and completely replaced with hot water has elapsed (the period indicated by the symbol _T3 in FIG. 9), the sequence controller 42c next The circulation pump 10 is temporarily stopped and the three-way valve 34a is switched to the state shown in FIG. 3c. In the state shown in FIG. 3c, the delivery pipe line 14 communicates only with the shoulder pipe line 16. Therefore, when the circulation pump 10 is next restarted by the sequence controller 42a, the hot water sent out from the circulation pump 10 is
It is supplied to the shoulder full nozzle 4 via the three-way valve 34a and the shoulder pipe line 16. As a result, as shown in FIG. 10, hot water is spouted from the shoulder nozzle 4b and is sprayed onto the shoulders of the bather.

In the above embodiment, the three-way valve 34a is used as the flow rate control means, but each passage 3 of the three-way valve 34a
6a and 36b have the same diameter, and a similar effect can be obtained by providing a solenoid valve in the middle of the shoulder piping path 16, and using this solenoid valve as a flow rate control means and controlling its opening degree by the sequence controller 42c. It will be done.

Example 5 This example relates to the fourth invention,
The configuration differs from the fourth embodiment in the following points. That is, in this embodiment 5, as shown in FIG. 8, a leak path 48 is formed that branches off in the middle of the shoulder piping path 16 near the shoulder full nozzle 4b and opens into the side wall 2a of the bathtub 2.
The difference is that the control operation of the sequence controller 42d is different. The other configurations are the same as in the fourth embodiment.

The control operation of the sequence controller 42d will be explained below.

When the jet mode setting switch on the operation panel 40 is operated in order to take a bath using the jet nozzle 6, the sequence controller 4
In response, 2d, as shown in Figure 3b,
After switching the three-way valve 34a to a position where it communicates with both the jet pipe line 18 and the shoulder pipe line 16,
The circulation pump 10 and the air pump 20 are started. As a result, foamy hot water is spouted from the jet nozzle 6, while a portion of the hot water sent from the circulation pump 10 also flows into the shoulder piping path 16 via the three-way valve 34a, and further flows into the side wall of the bathtub 2 from the leak path 48. It falls along 2a. Therefore, even when foamy hot water is spewing out from the jet nozzle 6, the hot water flows in the shoulder piping path 16.

On the other hand, when the shoulder full mode setting switch on the operation panel 40 is operated in order to take a bath using the shoulder full nozzle 4b, the sequence controller 42d responds by:
As shown in FIG. 3c, the three-way valve 34a is switched to a position where it communicates only with the shoulder pipe line 16 and closes the jet pipe line 18. As a result, the hot water sent out from the circulation pump 10 passes through the three-way valve 34a and the shoulder pipe line 16 to the shoulder full nozzle 4.
It will be squirted out from b and will be showered on the shoulders of the bather. At this time, hot water is also discharged from the leak path 48, but the amount is small and flows along the side wall 2a of the bathtub 2, so it is not very noticeable. In this way, during bathing, even when bathing using the jet nozzle 6 in addition to the shoulder full mode, the hot water flows through the shoulder piping path 16, so the hot water does not cool down within the shoulder piping path 16.

In addition to the embodiments described above, by providing a bypass leak path between the delivery piping 14 and the shoulder piping 16 and making the leak path small in diameter, the delivery from the circulation pump 10 can be improved. It is also possible to configure a part of the hot water to flow into the shoulder piping path 16 at all times.

<Effects of the Invention> According to the present invention, the initial spouting of cold water when starting the shoulder bath is prevented, so excellent effects such as being able to always take a comfortable bath are exhibited.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a configuration diagram of a bathtub system corresponding to embodiment 1, and FIG.
The figure is a sectional view of the shoulder full nozzle, FIG. 3 is a plan sectional view corresponding to each switching state of the three-way valve, FIG. A configuration diagram of the bathtub system corresponding to the second embodiment and the third embodiment, FIG. 6 is a timing chart of the control operation of the bathtub system corresponding to the second embodiment, and FIG. 7 is a control operation of the bathtub system corresponding to the third embodiment. 8 is a configuration diagram of the bathtub system corresponding to the fourth embodiment and the fifth embodiment, FIG. 9 is a timing chart of the control operation of the bathtub system corresponding to the fourth embodiment, and FIG. 10 is a timing chart of the bathtub system corresponding to the fourth embodiment. FIG. 3 is an explanatory diagram showing a state in which hot water is discharged from a shoulder full nozzle to a bather. DESCRIPTION OF SYMBOLS 1... Bathtub system, 2... Bathtub, 2a... Side wall, 4a, 4b... Shoulder full nozzle, 6
... Jet nozzle, 10 ... Circulation pump, 12
... Suction pipe line, 14... Delivery pipe line, 16...
Shoulder piping path, 18...Jet piping path, 20
...Air pump, 22...Air piping line, 24
...Suction piping line, 34a, 34b...Three-way valve, 3
6a...priority discharge port, 36b...leak discharge port,
40...operation panel, 42a, 42b, 42e,
42c... Sequence controller, 44... Drain piping path, 46... Drain valve, 48... Leak path.

Claims (1)

[Claims] 1. A shoulder full nozzle for shoulder pad pine surge is provided at the top of the bathtub, and a jet nozzle for foam pine surge is provided at the bottom of the side wall of the bathtub. A shoulder piping path for guiding hot water to the shoulder full nozzle, and a jet piping path for guiding hot water from the circulation pump to the jet nozzle, and a shoulder piping path for guiding hot water from the circulation pump to the jet nozzle. In a bathtub system in which a switching valve is provided at a branch part that branches into a tank, a suction pipe for generating negative pressure is formed between the jet pipe and the shoulder pipe to communicate the two, and a shoulder full mode is also provided. In response to the setting switch operation, the circulation pump is started, the switching valve is switched to a position where it communicates with both the jet piping path and the shoulder piping path, and after a predetermined period of time, the switching valve is connected to the shoulder piping path and the jet piping is connected. A bathtub system characterized by comprising a sequence controller that outputs a control signal for switching to a position where a passage is closed. 2. A shoulder fill nozzle for shoulder pine surge is installed in the upper part of the bathtub, and a jet nozzle for foam pine surge is installed in the lower part of the side wall of the bathtub, while hot water sucked up from the bathtub by a circulation pump is connected to the shoulder fall. A shoulder piping path leading to a nozzle, and a jet piping path leading hot water sent from the circulation pump to the jet nozzle, and a branching section that branches hot water from the circulation pump into a shoulder piping path and a jet piping path. In a bathtub system equipped with a switching valve, a drainage piping path is branched from the middle of the shoulder piping path, and a drain valve is attached to the drainage piping path. A bathtub system characterized by comprising a sequence controller that outputs a control signal that opens a drain valve and, after a predetermined period of time, closes a drain valve and starts a circulation pump. 3 A shoulder full nozzle for shoulder pine surge is provided at the top of the bathtub, and a jet nozzle for foam pine surge is provided at the bottom of the side wall, while hot water sucked up from the bathtub by a circulation pump is sent to the shoulder full nozzle. A branching section is provided which includes a shoulder piping path for guiding the hot water, and a jet piping path for guiding the hot water sent from the circulation pump to the jet nozzle, and that branches the hot water sent from the circulation pump into the shoulder piping path and the jet piping path. In the bathtub system, the shoulder piping path is provided with a water flow control means, and the circulation pump is activated in response to the operation of the shoulder full mode setting switch, and the water flow control means reduces the amount of water supplied, and the water flow rate is reduced for a predetermined time. A bathtub system characterized by comprising a sequence controller that outputs a control signal for supplying a set amount of water after a certain amount of water has elapsed. 4. A shoulder fill nozzle for shoulder pine surge is provided at the top of the bathtub, and a jet nozzle for foam pine surge is provided at the lower part of the side wall of the bathtub, while hot water sucked up from the bathtub by a circulation pump is sent to the shoulder fall. A shoulder piping path leading to a nozzle, and a jet piping path leading hot water sent from the circulation pump to the jet nozzle, and a branching section that branches hot water from the circulation pump into a shoulder piping path and a jet piping path. In a bathtub system equipped with a switching valve, the switching valve is provided with a leak passage that constantly supplies a small amount of hot water from the circulation pump to the shoulder piping, and the switching valve is connected between the jet piping and the shoulder in response to the operation of a jet mode setting switch. The switching valve is switched to a position where it communicates with both the shoulder piping passage and the circulation pump is started, while the switching valve is switched to a position where it communicates only with the shoulder piping passage and the jet piping passage is closed in response to the operation of the shoulder full mode setting switch. A bathtub system comprising a sequence controller that outputs a control signal to start a circulation pump.