JPH031865A - Hot water jet pressure detecting sensor in bubble generating bathtub - Google Patents

Abstract

PURPOSE:To eliminate contact corrosion, hysteresis of contact opening and closing and the fatigue of a leaf spring by making the title sensor contactless and to extend the life of the sensor and to detect pressure accurately and stably by arranging a pressure detecting sensor constituted of pressure conductive rubber to a bath hot water forcible feed flow passage. CONSTITUTION:A pressure detecting sensor 48 is constituted so that a diaphragm 48b is provided in a sensor case 48a under tension and one surface of said diaphragm 48b is allowed to communicate with a bath hot water forcible feed pipe 11 so as to receive the pressure in the pipe 11 and a plunger 48c is connected to the other surface of the diaphragm 48b to transmit the displacement of the diaphragm 48b to pressure conductive rubber 48e through a press body 48d. Since this sensor is constituted so that an electric resistance value is changed corresponding to the deformation quantity of the rubber 48e, by detecting the resistance value of the pressure conductive rubber 48c, the pressure in the bath hot water forcible feed pipe 11 can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a bath water ejection pressure detection sensor in a bubble-generating bathtub.

(b) Conventional technology Conventionally, as a basic form of a bubble-generating bathtub, Japanese Patent Application Laid-Open No. 59-1
As described in Publication No. 35058, a bath water circulation flow path consisting of a bath water suction pipe and a bath water bullet conveying vibrator is interposed between the bathtub body and a circulation pump installed outside the bathtub body. However, there are some types of bathtub vibrators that have an air intake part in the middle.

With this configuration, the circulation pump sucks the bath water inside the bathtub body through the bath water suction pipe, and the circulation pump also passes the bath water through the bath water bullet delivery pipe and squirts it into the bathtub body from the discharge part of the vibrator. I'm trying to make it happen,
At this time, the ejected bath water is mixed with air sucked in from the air intake part using the negative pressure caused by the ejection of the bath water, so that the bath water mixed with air bubbles can be made and ejected.

In order to detect the pressure of the bath water spouted from the nozzle, a pressure switch (s) as shown in FIG. (b) and transmits the displacement of the diaphragm (b) to a leaf spring (C) which also serves as a lever, and a movable contact (d) provided at the tip of the leaf spring (C) and a fixed contact (e ), the pressure in the bath water blast vibrator (a) is compared with the set pressure.

(c) Problems to be Solved by the Invention However, the location where the above device is installed is near the bathtub, where the humidity is high, and furthermore, it is exposed to sulfur dioxide gas, nitrite gas, etc. from protein decomposition products in the bath water. Since the switch (S) has many chances to be damaged, conduction failures due to corrosion of the movable and fixed contacts (d) (0) of the switch (S) are likely to occur, resulting in a short service life.

In addition, the switch (S) requires a withstand pressure higher than the circulation pump's discharge pressure, so it is not suitable for detecting minute pressures such as water level detection, and the hysteresis of the contact opening/closing operation is large.
The drawback was that the detected pressure varied widely.

(d) Means for Solving the Problem Therefore, in the present invention, a bathtub consisting of a bath water suction channel and a bath water forced flow channel is provided between the bathtub body and a circulation pump installed outside the bathtub body. A hot water circulation flow path is provided, and an automatically variable jetting nozzle is installed at the outlet of the forced bath water flow path into the bathtub body, and the air intake amount is automatically variable in the hot water supply flow path. The air intake portions are connected in communication so that bathwater mixed with air bubbles can be spouted into the bathtub body by the automatic variable spouting amount spouting nozzle, and the bathwater forced flow path is constructed of pressurized conductive rubber. It is an object of the present invention to provide a bath water ejection pressure detection sensor for a bubble-generating bathtub, characterized in that a pressure detection sensor is disposed therein.

(e) Examples The bubble-generating bathtub according to the present invention will be explained in detail below with reference to the accompanying drawings.

First, the overall structure of the bubble-generating bathtub according to the present invention will be explained.

(A) shown in FIGS. 1 and 2 is a bubble-generating bathtub according to the present invention, and the bubble-generating bathtub (A) includes front and rear walls of a bathtub body (1) formed in a box shape with an opening at the top; On the left and right side walls,
Feet side, dorsal side, and ventral side jet nozzles (2) (2)
(3) (3) (4) A total of six (4) are provided.

The bathtub body (1) has a flange-shaped edge (Ia) of a constant width formed on the periphery, and an air intake portion (5) on the edge (1a).
), and a transverse V-shaped vertically long recess (lb>(lb) is formed approximately at the center of the left and right side walls, and the same recess (J, b) (
1, b ) sloped surface (i'b) on the side facing the rear wall (dorsal side)
), the ventral side jet nozzle (4) (4) is attached toward the center of the rear wall.

In addition, a pump protection case (9) is arranged outside the bubble generating bathtub (A), and inside the case (9),
A circulation pump (P) that circulates bath water and the same pump (P)
A filter (43) that filters the bath water circulated by the pump, and a pump drive motor (M) that drives the pump (P).
The same motor (M), the motor for driving the valve body for the nozzle (old), which will be described later, and the motor for driving the valve body for adjusting the amount of air bubbles (
M2) and a control unit (C) that controls the driving of the electric three-way valve (45).

Moreover, a bath water circulation channel (D) is interposed between the circulation pump (P) and the bubble generating bathtub (A).

That is, the bath water circulation flow path (D) is connected to the bubble generating bathtub (A).
A bath suction vibrator (10) is used to send bath water from the circulation pump (P) to the circulation pump (P), and from the circulation pump (P) to the bathtub (A).
) for sending bath water to the hot water pump (11).

The bath suction vibrator (10) is connected to the bathtub body (1).
One end is opened at the bottom of the circulation pump (P), and the other end is connected to the water intake port of the circulation pump (P) so that bath water is sucked into the circulation pump (P). Pump (P
), one end of which communicates with the spout of the spout nozzle (2) (
3) The other end of each is connected to (4) 6 In addition, in Figure 1, (7) is an outlet connected to a power source,
(30b) is an infrared receiving sensor that receives infrared radiation transmitted from a remote controller (30), which will be described later.
30c) is a reception indicator lamp provided on the agency's outside line reception sensor.

In addition, as shown in Figure 3, the circulation pump (P) is equipped with a rotation speed detection sensor (6) that detects the rotation speed of the circulation pump (P), and the detection results from the sensor (6) are , is sent to a control section (C) which will be described later, and the control section (C) controls the rotation speed of the circulation pump (P).

In addition, as shown in Fig. 3, a pressure detection sensor (48) for detecting the pressure of the bath water being pumped through the pipe (II) is installed in the middle of the bath water bullet conveying pipe (11). The detection results from the sensor (48) are manually input to the control section (C), which will be described later, and the control section (C) controls each ejection nozzle (2) (3).
The water level in the bathtub body (1) is detected as well as the pressure of the bath water ejected from the bathtub (4).

As shown in FIG. 4, the pressure detection sensor (48) has a diaphragm (48b) stretched in a sensor case (48a), and the negative side of the diaphragm (48b) is connected to the hot water bullet conveying pipe (11). The pressure in the pipe (11) is communicated with the pipe (11), the plunger (48c) is connected to the other side, and the suppressor (48c) is connected to the other side of the pipe (11).
48d), the displacement of the diaphragm (481)) is transmitted to the pressurized conductive rubber (48e).

In addition, the suppressor (48d) is a spring (48r).
Therefore, the diaphragm (48b) is displaced to the point where the above pressure and the biasing force of the spring (48r) are balanced. In addition, (48g) is J,
'J seiki screws are available.

As shown in FIG. 5, the pressurized conductive rubber (48e) is configured so that its electrical resistance value changes depending on the amount of deformation of the rubber (48e). )
By detecting the resistance value, it is possible to detect the pressure inside the bath water forcing vibrator (11).

In particular, since the differentiation of the resistance value with respect to the amount of deformation changes rapidly with a constant amount of deformation as the threshold value (48i), the amount of deformation of the pressurized conductive rubber (411e) at the set pressure is set to the threshold value (481). By matching the values, switching output can be obtained with a simple circuit.

As mentioned above, this pressure detection sensor (48) is non-contact and suffers from corrosion of the contacts, hysteresis of the opening/closing of the contacts, and fatigue of the leaf spring, which were unavoidable with conventional switch-type pressure sensors. This eliminates the causes of malfunctions, has a long life, and enables accurate and stable pressure detection.

The jet nozzles (2), (3), and (4) each use an automatic variable jet nozzle configured to be able to change the jet amount and jet pressure of bath water. Since they have the same configuration, taking the foot side jet nozzle (2) as an example,
This will be explained with reference to FIG.

The foot side jet nozzle (2) is a cylindrical nozzle body (
20), a valve seat forming cylinder (21) fitted into the front part of the nozzle body (20), and a valve seat (21a) formed at the rear of the valve seat forming cylinder (21) from the rear. A valve body (22) for adjusting the jet m to be released, a motor (old) for driving the valve body for a nozzle that removably supports the valve body (22) for adjusting the jet amount and moves the valve body forward and backward, and the above-mentioned valve seat. It consists of a throat (24) supported in front of a forming cylinder (21) so as to be swingable.

The nozzle body (20) has a gasket (1
It is removably fixed to the wall surface of the bathtub body (1) by a mounting screw (11) screwed through the nozzle body (20), and one end is attached to the central peripheral wall of the nozzle body (20).
) is connected to the other end of the intake vibrator (12), and a hot water bomb delivery pipe (II) is connected to the rear peripheral wall of the nozzle body (20).

Further, a cylindrical decorative cover (26) whose front portion is folded outward is fitted into the front edge of the nozzle body (20).

The valve seat forming cylindrical body (21) has a rear end surface located in the vicinity of the bullet-feeding vibration connecting part (20c) inside the nozzle body (2o).

In addition, a throat support surface (2tc) having a substantially concave spherical surface is formed on the front inner circumferential surface of the valve seat forming cylinder (21), so that the throat (24) having a spherical outer circumferential surface at the base can be freely swung. It is attached to. (25) is Su. - It is a fixing member.

At the center of the rear end of the valve seat forming cylinder (21) is a valve seat (21a).
), and a valve body 2 for adjusting the jetting amount is formed on the same valve seat (21a).
2) are moved toward and away from each other, so that the opening/closing unit (adjusting the jet amount and jet pressure) of the bath water flow passage (27) can be adjusted by the jet amount adjusting valve body (22).

The motor (Ml) for driving the nozzle valve body forward and backward is attached to the rear wall (20g) of the nozzle body (20), and is equipped with a coil (23a) and a permanent magnet provided inside the motor casing (23). The armature (23b) is configured to perform a stepping operation, and the rotating shaft of the motor (Hl) is formed into a hollow shaft, and a ball screw (23c) is configured inside the shaft. ) is converted into a linear motion in the axial direction, and the ejection amount adjusting valve body (22) is moved forward and backward via the valve body support rod (23d).

(23g) is a rotation regulation J) that prevents the valve body support rod (23d) from rotating with the ball screw (23c), and (22e) is the rear end periphery of the valve body for controlling the jetting amount (22) and the jet This is a bellows-shaped waterproof cover interposed between the front surface of the rear wall (20g) of the nozzle body (20).

Furthermore, the motor (old) for driving the nozzle valve body forward and backward is equipped with a magnet (
A valve body base position detection sensor (23'') consisting of a Hall element (231) and a Hall element (23j) is disposed.
31) is converted into an electrical change and inputted to the control section (C) to detect the deviation of the jet i regulating valve body (22) from the reference position.

Next, the air intake section (5) will be explained.

As shown in FIGS. 7 and 8, the air intake section (5) has one air intake section (1r) opened at the edge (1a) of the bath 16 main body (1) and an upper opening. A rectangular box-shaped air intake main body (80) is fitted, and the top opening of the air intake main body (80) is covered with a lid (82), and only the outside of the lid (82) is covered. The outside air and the inside of the air intake main body (80) are communicated through the formed air intake port (82a).

An intake pipe connection part (83) is provided at the center of the bottom of the air intake main body (80), and one end of the intake pipes (12) (12) is connected to the front and rear walls of the connection part (83), respectively. Air taken into the air intake main body 80) is supplied to each jet nozzle (2) (3) (4) via each intake pipe (12) (12).

In addition, inside the air intake body (80), a cylindrical sound absorbing material having a sound absorbing function and an air purifying function such as a porous sintered plastic body (for example, a sintered polyethylene body, a sintered polypropylene body) is used. A plurality of silencers (92) are provided.

An air bubble amount adjustment valve (87) is provided in the intake pipe connection part (83) to open and close the communication passage (86) between the connection part (83) and the intake body (80). The amount control valve (87) has a cylindrical valve body (88) whose upper end edge communicates with the bottom of the intake body (80), and a valve body (8B).
The motor for driving the valve body for the nozzle (Ml
) The motor for driving the valve body for controlling the amount of air bubbles (M2
) and the valve body support rod (
89), and a valve body (90) that is attached to the tip of the rod (89) and is movable toward and away from a valve seat (88b) formed on the upper edge of the valve body (88).

A valve position detection sensor (91) having the same configuration as the valve body reference position detection sensor (23r) is disposed in the bubble volume adjusting valve body drive motor (M2).

In Fig. 7, (84) beam actance type silencer, (
85) is a check valve for preventing bath water from flowing back into the intake pipe (I2).

Next, the circulation pump (P) will be explained.

As shown in FIG. 9, the circulation pump (P) has an upper impeller chamber (33) and a lower impeller chamber (34) connected to each other through a flow path (32d) in the pump casing (32).
The lower impeller chamber (34) is communicated with the bath temperature suction vibe (10) via a bath water suction path (32a) provided on the lower side of the pump casing (32), and The bath water bullet feed pipe (
11), and communicated with one end of a lead-in pipe (41) of a filter (43), which will be described later, via a filter bullet feed path (32c) provided on one side of the upper impeller chamber (33). (32e) is the water inlet, (32r) is the lower water outlet, (
32g) is the upper spout, (zl) is the circulation flow direction, (I
2) indicates the filtration flow direction.

Then, an impeller shaft (35) is mounted on the deaf so as to vertically penetrate the center portions of the upper and lower impeller chambers (33) and (34), and the upper impeller (33) is mounted on the impeller shaft (35).
a) and the lower impeller (34a) were installed coaxially within the upper and lower impeller chambers (33) and (34), respectively, and the impeller shaft (35) was mounted on the pump casing (32) in an integral and watertight manner. Pump drive motor (M)
The drive shaft (39) is interlocked with the drive shaft (39).

The pump drive motor (M) is an inverter-controlled fully enclosed external fan-type induction motor, and the drive shaft (39) is equipped with a control section (C).
) is provided with a rotation speed detection sensor (6) connected to the rotation speed detection sensor (6).

(3B) is a sealing material attached to the impeller shaft (35).

With this configuration, the upper and lower impellers (33a) (34
When you rotate a), the bath water will flow through the bath water suction vibe (10)-
Water intake (32e) - Bath water suction path (32a) - Lower impeller chamber (34) -> Bath water bullet feed path (32b) - Lower water spout (
32r) - The bathtub body (1) via the bath water suction pipe (■1)
).

Furthermore, as shown in Fig. 9, a filter (43) is connected to the upper impeller chamber (33) of the circulation pump (P) via a lead-in pipe (41) and a return pipe (42). , upper spout of upper impeller chamber (33) (32g
), a part of the bath water sucked into the lower impeller chamber (34) is sent to the filter (43), and the bath water filtered by the filter (43) is returned. Insert the bathing bullet sending vibe (1) through the pipe (42).
1) The bath water is sent into the bath water and is forced to flow into the bath water bullet feed vibe (11) from the lower spout (32'') of the lower impeller chamber (34).

Note that (39a) is an armature, (39b) is a field coil, and (39c) is a cooling fan.

Next, the configuration of the filter will be explained.

As shown in FIG. 10, the filter (43) has an acrylic mesh (43b) stretched on the lower part of the filter body (43a), and a granular filter material (43c) is placed on the mesh (43b).
is mounted, and the bath water is passed through the filter material (43c) from above to below the filter body (43a), thereby making it possible to filter the bath water. (43
d) prevents the upper surface of the granular filter material (43c) from being washed away during bath water filtration. In addition, it is a baffle for preventing particulate filter material (43c) from flowing out during backwashing, which will be described later.

The upper end of the filter body (43a) is connected to the lead-in pipe (4).
1) One end is connected in communication, one end of the return pipe (42) is connected in communication with the lower end of the filter main body (43a), and an electric three-way valve (45) is provided in the middle of the lead-in pipe (41). , connect the drain pipe (46) to one end of the electric three-way valve (45), and connect the lead-in pipe (46) to one end of the electric three-way valve (45).
1) and the drainage vibrator (46) can communicate with each other.

When the electric three-way valve (45) is set in such a state that the drainage vibrator (46) is closed and the lead-in pipe (41) is in flow, a portion of the bath water flows through the lower impeller of the circulation pump (P). Chamber (34) Continuous communication channel (32d) - Upper impeller chamber (33) - Filter bullet feed channel (32c) - Upper water spout (32g) → Sends to the filter (43) via the lead-in pipe (41) filtered, return pipe (42)
through the bathtub body (1) via the bath water bullet delivery pipe (11).
) joins the bathing water that is forced inside.

Furthermore, when the electric three-way valve (45) is switched to close the upstream lead-in pipe (4) and to disconnect the upstream lead-in pipe (41) and the drainage vibe (46), the bath A part of the bath water in the hot water bullet delivery pipe (11) passes through the return pipe (42), moves upward from the bottom of the filter body (43a), and passes through the filter material (43c). (
43c) backflow cleaning can be performed.

The switching operation of the electric three-way valve (45) can be performed by a remote controller (30), which will be described later.

Next, the control section (C) will be explained.

As shown in FIG. 3, the control unit (C) includes a microprocessor (MPU) and an input/output interface (50) (
51), a memory (52) consisting of ROM and RAM, and a timer (53).

The input interface (50>) detects the rotation speed detection sensor (6), the valve body reference position detection sensor (23f), the valve position detection sensor (91), and the water pressure in the bath water bullet delivery pipe (11). A pressure detection sensor (48), an infrared receiving sensor (30b), and a bath water temperature detection sensor (T) that detects the temperature of bath water in the bathtub body (1) are connected.

The output interface (51) includes an inverter (1) a motor (Ml) for driving the valve body forward and backward for the nozzle, and an air bubble volume of 17μ.
Motor for driving the regulating valve body (M2) and electric three-way valve (4
5) is connected.

In addition, the memory (52) stores each motor (M) (Ml) (M2), electric three-way valve (45), etc. based on the output signal from each sensor described above and the signal from the remote controller (30). A control program for controlling the drive unit is stored.

In particular, the control of the circulation pump (P) rotation speed is
) is controlled by an inverter (C) controlled by a control unit (C).
1) to convert the frequency and convert the pump drive motor (M)
We are trying to do this by supplying the

Next, the remote controller (30) for mediating between the control unit (C) and the user will be explained.

As shown in Fig. 11, the remote controller (30) has an ON/OFF switch (60), a mild plow switch (61) which is a preferred jet mode switch, a shiatsu plow switch (62), and a pulse plow switch (
63), pine surge plow switch (64), wave plow switch (65), air pulse plow switch (79), and air bubble increase/decrease switch (86) (8
7), bath water spout strength switch (68) (69),
Cycle increase/decrease switches (70) (71), all jet nozzle usage pattern switch (72) which is a changeover switch for your favorite jet nozzle usage pattern, circulation usage pattern switch (73), and dorsal jet nozzle usage pattern switch (74). ), foot side jet nozzle usage pattern switch (75
), and ventral jet nozzle usage pattern switch (76)
and a filter cleaning switch (77).

Then, by turning on the ON-OFF switch (6o), the control section (C) is activated.

In addition, (78) is a power lamp, (Boa) is an operation indicator lamp, (81a) (B2a) (83a) (84a
) (65a) (79a) are each moto switch display lamp, (66a) (67a) are bubble m setting lamps, (6
8a) (69a) is the bath water jet strength setting lamp, (70
a) (71a) is the bath water spout cycle setting lamp, (72a)
) (73a) (74a) (75a) (76a) is a jet nozzle usage pattern setting lamp, and (77a) is a filter cleaning switch indicator lamp.

Moreover, such a remote controller (30)
As shown in the figure, the front end is equipped with an infrared irradiation section (30a), and by operating each switch, a preset multi-frequency tone modulation system (MF
TM), an infrared signal modulated according to the operation of each switch is transmitted from the infrared irradiation section (30a),
The same infrared rays are detected by an infrared receiving sensor (30b) installed in the bathroom.
) (see Figure 1), and is sent to the human interface (50) of the control unit (C) and sent to the memory (50).
A desired drive device is driven based on the control program read from 2).

Moreover, the remote controller (30) is constructed so that it can float above the bathing surface, and can be operated by a bather at 1 while taking a bath.

In addition, an infrared receiving sensor (30b) and an air intake part (5)
and can also be configured externally.

With the above configuration, the bubble-generating bathtub (^) is controlled by the remote controller (30) that can be operated on the bath water surface, controlling the rotation speed of the circulation pump (P) and each jet nozzle (2) via the control unit (C). 3) The valve body for adjusting the jetting amount provided in (4) (
Adjustment of the opening/closing amount and opening/closing speed of 22) and the opening/closing amount and opening/closing speed of the air bubble amount control valve (87) provided in the air intake part (5),
The electric three-way valve (45) can be switched, and can control the rotational speed of the circulation pump (P), the opening/closing amount and opening/closing speed of the ejection volume regulating valve body (22), and the bubble volume regulating valve. By adjusting the opening/closing amount and opening/closing speed of (87) and the combination thereof, six types of jet modes (mild blow, A favorite jet mode switch (61) that allows you to set each jet mode (shiatsu plow, pulse plow, pine surge blow wave plow, and air pulse plow), and each jet mode is provided on the remote controller (30).
-(65) can be selected by ON/OFF operation.

Moreover, for each mode, there is a bubble volume increase/decrease switch (BB) (67) and a bath water jet strong/local side switch (67).
8) (69) and cycle increase/decrease switch (70)
(71) and OFF respectively, it is possible to increase/decrease the amount of bubbles, adjust the strength of the hot spring water every week, and adjust the cycle of the hot water hot water.

Furthermore, by turning ON/OFF each selector switch (72) to (76) for the desired jet nozzle usage pattern, it is possible to select the usage pattern of the six jet nozzles to which the jet mode is applied. I have to.

Further, by turning on and off the filter cleaning switch (77), the electric three-way valve (45) is operated to perform backflow cleaning of the filter (43).

(to) Effect According to the present invention, the following effects are produced.

In other words, the pressure detection sensor installed in the bath water forced flow path between the circulation pump and the bathtub body is made of pressurized conductive rubber whose electrical resistance changes depending on the amount of deformation, making it possible to use contactless contact. This eliminates the causes of problems that are inevitable with conventional switch-type pressure sensors, such as contact corrosion, hysteresis in contact opening/closing, and flat spring fatigue, allowing for long service life and accurate and stable pressure detection.

Note that the electrical resistance value of pressurized conductive rubber changes rapidly with a certain amount of deformation as the threshold value, so if the amount of deformation of the pressurized conductive rubber at the set pressure matches the above threshold value, , switching output can be obtained with a simple circuit,
It can be easily replaced with a conventional pressure sensor.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a bubble-generating bathtub according to the present invention. FIG. 2 is a plan view of the bubble-generating bathtub. FIG. 3 is an explanatory diagram of the conceptual structure of the bubble-generating bathtub. FIG. 4 is a cross-sectional explanatory diagram of the pressure detection sensor. FIG. 5 is a graph showing the relationship between the amount of deformation of pressurized conductive rubber and the electrical resistance value. FIG. 6 is an enlarged sectional view of the jet nozzle. Figure 7 is a piping diagram of the intake pipe. FIG. 8 is an enlarged sectional view of the air intake section. Fig. 9 is a partially cutaway front view of the pump drive motor (!: circulation pump). Fig. 10 is a sectional view of the filter. Fig. 11 is a plan view of the remote controller. Fig. 12 is a conventional Cross-sectional diagram of the pressure switch. (A): Bubble generating bathtub (P): Circulation pump (C) 2 control parts (1, 1): Bath water circulation flow path (1) / bathtub body (2) 2 foot side spout Nozzle (3)/Dorsal side jet nozzle (4): Ventral side jet nozzle (10): Bath water suction pipe (11): Bath water suction pipe (48)/Pressure detection sensor (48e): Pressurized conductive rubber No. Figure Figure Figure 1f Figure 1O

Claims (1)

[Claims] 1) A bath water circulation flow path consisting of a bath water suction flow path and a bath water forced flow path is interposed between the bathtub body and a circulation pump installed outside the bathtub body, and a bath water forced flow flow path is provided. An automatically variable spout nozzle is installed in the discharge section of the channel into the bathtub body, and an air intake section with an automatically variable air intake is connected to the bath water forced flow channel to achieve the automatic variable spout amount. The jetting nozzle is configured to be able to jet bath water mixed with air bubbles into the bathtub body, and the above-mentioned
A bath water ejection pressure detection sensor in a bubble-generating bathtub, characterized in that a pressure detection sensor made of pressurized conductive rubber is disposed in a bath water forced flow path.