JP2881901B2 - Bubble tub - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a safe water discharge control of high-temperature hot water in a bubble generating bathtub.

(B) Conventional technology Conventionally, while circulating bath water in a bathtub body via a bath water circulation pump installed separately, bath water is jetted from a jet nozzle, and at the same time, air is jetted as air bubbles together with the bath water. There is a bubble generating bath tub as described above (JP-A-59-135058).

In such a bubble generating bath, in order to ensure safety from the high-temperature hot water, when a certain amount or more of the high-temperature hot water enters the bath, the sensor detects the high temperature and outputs a signal to the control unit to automatically output the signal. The concept of stopping the operation of the bathwater circulation pump to ensure safety to the body has already been filed by the present applicant (Japanese Patent Application No. 1-132076 (Japanese Patent Application Laid-Open No. Hei 2-132076)).
No. 309965), Japanese Patent Application No. 1-130617 (JP-A-2-307465)
issue)).

(C) Problems to be Solved by the Invention However, in the case of such a control system in which the operation at a high temperature is automatically stopped, water is put into a high-temperature hot-water bath to obtain an appropriate-temperature bath. Although the operation switch can be operated to restart the operation of the bath water circulation pump, the operation of the bath water circulation pump is not performed as long as the hot water still remains in the piping or the bath water circulation pump. I can't.

This is because the bath water in the piping or the bath water circulation pump is still sensed by the sensor as a temperature for preventing high-temperature operation, and a signal for stopping the bath water circulation pump is output.

Therefore, in order to restart the operation of the bath water circulation pump,
It is necessary to wait for the hot water in the piping or in the bath water circulation pump to cool down to the temperature at which the operation is resumed, and the efficiency becomes poor.

For this reason, if the temperature becomes appropriate during bathing, it is conceivable to operate the bath hot water circulation pump by turning on the switch for resuming operation despite the high-temperature hot water in the piping. High-temperature hot water may be spurted out of the spouting nozzle and cause harm to the body.

According to the present invention, in such a case, the hot water is discharged without causing any harm to the body.

(D) Means for Solving the Problems The present invention provides a bath water circulation channel between a bathtub body and a bathwater circulation pump installed outside the bathtub body, and communicates with the bathtub circulation channel. While inhaling air from the connected air intake section, in a bubble generating bath tub configured to be able to jet a bath of air containing bubbles from a plurality of jet nozzles provided in the bath tub body,
When the bath water temperature is equal to or higher than the predetermined temperature, a safety water discharge control routine that limits the amount or position of the water discharged so that the hot water is discharged without harm to the body even when the circulation pump operation is started. The present invention relates to an air bubble generating bath characterized by being provided. Further, according to the present invention, the safe water spouting control routine is configured such that the bathwater is spouted only from the spout nozzle on the chest side for a certain period of time according to the instruction to start the bathwater spouting operation. By instructions
It is also characterized in that the motor control for the bath water circulation pump is performed to discharge water more slowly than usual.

(E) Function / Effect According to the present invention, when the temperature of the bath water reaches a predetermined high temperature, the sensor detects the temperature and outputs a signal to stop the operation of the bath water circulation pump to stop the ejection of the bath water from the nozzle. I do.

So, after putting water in the bathtub and making it a suitable temperature bath,
When the operation switch is turned on again, the bath water circulation pump starts operation, but the hot water in the piping or the bath water circulation pump is
Water is spouted without harm to the body,
For example, the hot nozzle is discharged only from the chest nozzle so as to hit the relatively insensitive chest, so that hot water does not splash on the feet and back, or the opening operation of the jet nozzle is gradually performed to discharge hot water gradually. In addition, the speed of rotation of the bath water circulation pump is set to a low speed for a while, so that gentle water discharge can be performed.

Therefore, even if high-temperature hot water remains in the piping or the hot-water bath circulating pump, there is an effect that dangerous water is not discharged to the body and the jet operation can be continued.

(F) Example First, the overall structure of the bubble generating bath according to the present invention will be described.

(A) shown in FIG. 1 is a bubble generating bathtub according to the present invention, in which a bathtub body (B) installed in a bathroom, various devices attached thereto, and a functional unit case (E) installed outdoors. And various devices installed in

The bathtub body (B) is provided with a pair of foot-
A total of six back and thorax ejection nozzles (2), (3), and (4) are provided.

Further, a flange-shaped edge (1) having a fixed width is formed on the periphery of the bathtub body (B), and an air intake portion (5) is formed on the edge (1).
An infrared signal receiving section (R1) and an operation panel (93) are provided.

Each of the ejection nozzles (2), (3), (4) communicates with the air suction portion (5) via the suction pipe (8).

The function case (E) includes a bath water circulation pump (P), an inverter (I) for controlling a pump driving motor (M), a motor for driving the pump (M), and a motor for driving the valve body for nozzles. A control unit (C) for controlling (M1), a filter (F) for filtering bath water, and an electric three-way valve (Ve) for controlling the filter (F) are provided.

Then, between the bathtub body (B) and the bathwater circulation pump (P), between the water suction port (94) provided at the lower part of the side wall of the bathtub body (B) and the suction port (32e) of the bathwater circulation pump (P). A hot water suction pipe (10) for feeding hot water is interposed, and between the water discharge port (32g) of the hot water circulation pump (P) and each of the jet nozzles (2) (3) (4). A bath water circulation flow path (D) is formed by interposing a bath hot water supply pipe (11) for sending bath water from the pump (P) to the bathtub body (B).

(R1) is an infrared signal receiving unit that receives an infrared signal from the remote controller (R), and is connected to the control unit (C).

By operating the remote controller (R) with the above configuration, the output frequency of an inverter (I), which will be described later, is controlled via the control unit (C). Changing or adjusting the bath pressure for each of the nozzles (2), (3), (4), and controlling the operation of the filter (F) by controlling the electric three-way valve (Ve). Can be.

As shown in FIG. 2, the functional case (E) is formed in a substantially rectangular parallelepiped shape. A shelf plate (E1) is stretched inside the functional unit case (E) to divide the internal space into upper and lower portions. ) On top, electrical equipment such as earth leakage breaker (ELB), fan (F1), insulation transformer (Ti), power transformer (Tr), noise filter (Fn), inverter (I) and control unit (C) are mounted. ing.

The inverter (I) changes the output frequency under the control of the control unit (C) to change the rotation speed of the pump driving motor (M) in a stepless manner, as shown in FIG. ,
A switching circuit (Sw) that converts single-phase AC 100V power from a commercial power supply (S) to DC 200V using a power transformer (Tr), a rectifier (r), and a smoothing capacitor (Cr), and is built into the inverter (I). And the switching frequency of the switching circuit (Sw) is controlled via the inverter control circuit (1c) in accordance with the control code from the control unit (C), so that the output frequency of the inverter (I) is controlled. It can be changed arbitrarily. Therefore, under the control of the control section (C), the rotation speed of the bath water circulation pump (P) connected to the pump driving motor (M) is changed, and the pump (P)
Can be changed steplessly.

The control unit (C) is provided on a substrate (C1) which is erected at predetermined intervals on the inner side surface of the inverter (I).

A filter (F), a bath water circulation pump (P), and an electric three-way valve (Ve) are provided below the shelf plate (E1).

As shown in FIG. 4, the bath water circulation pump (P) communicates the upper impeller chamber (33) and the lower impeller chamber (34) in the pump casing (32) through a communication passage (32d). And a lower-stage impeller chamber (34) provided at the lower side of the pump casing (32).
Through the hot water supply pipe (10), and a strong hot water supply path (32) provided on the other lower side of the pump casing (32).
It communicates with the hot water bath (11) through b).

Then, the impeller shaft (35) is suspended from the upper and lower impeller chambers (33) and (34) so as to penetrate the center vertically.
An upper impeller (33a) and a lower impeller (34a) are coaxially mounted on the impeller shaft (35) in the upper and lower impeller chambers (33) and (34), respectively.
Are connected to a drive shaft (39) of a pump drive motor (M) integrally and watertightly mounted on a pump casing (32).

A rectifying plate (29) protrudes from the end of the bath water suction passage (32a) to rectify the bath water drawn into the lower impeller chamber (34), thereby increasing the pump efficiency.

In addition, the filter is connected to a suction pipe (41) of a filter (F) to be described later via a strong filtration path (32c) provided on one side of the upper impeller chamber (33).

(36) is a mechanical seal lubricated by bath water attached to the impeller shaft (35), (39a) is a motor casing of the pump driving motor (M), (39b) is a rotor,
(39c) is a fixed magnetic pole, (39d) is a cooling fan that also serves as a water slinger, (39e) is a cooling air inlet, (39f) is a cooling air outlet, (32e) an inlet, (Z1) is a circulating flow direction, Z
2) is a filtration flow direction, and (34b) is a communication hole.

With the above configuration, when the pump driving motor (M) is rotated, the bathtub main body (B) → bath water suction pipe (10) → inlet (32e) → lower impeller room (34) → bath water strong feed path (32)
b) → Bath hot water pipe (11) → Bathtub body (B). In addition, part of the bath water sucked into the lower impeller room (34) is reduced to the lower impeller room (34) → the communication flow path (32d) → the lower impeller room (33) → the inlet pipe (4).
1) → filter (F) → return pipe (42) → strong bath pipe (11) → bathtub body (B).

Further, as shown in FIG. 5, a pressure transmission path of a pressure sensor (Sp) for detecting a water level of the bath water is connected to a bath water circulation pump (P).
Opening (Sp1) on the side wall of the bath water suction passage (32a), and a temperature sensor (T) for detecting the bath water temperature is placed in the lower impeller room (34).
Is provided. Therefore, the water level and temperature of the bathwater in the bathtub body (B) are measured at the position of the bathwater circulation pump (P).

The filtering machine (F) is a down-flow type filtering machine capable of backwashing a filter medium. As shown in FIG. 6, upper and lower shells (28f) (28g) each having a substantially cylindrical shape with a bottom are provided at each opening. Bolts (28d) through which the upper and lower flanges (28d) and (28e)
c) to form a filter body (43a), form a support net (43b) in the lower part of the filter body (43a), and attach upper and lower baffle plates (43d) (43f) above it. The lower baffle plate (43f) and the supporting mesh (4
3b) and a beaded filter medium (43
c) is filled.

Then, at the upper end of the filter body (43a), a drop-in pipe connecting portion (41a) connected to the upper impeller chamber (33) of the bath circulation pump (P) through a drop-in pipe (41).
And an exhaust pipe connecting part (28a) communicating with the outside air via an exhaust pipe (28), and at the lower end of the main body (43a), communicating with a hot water supply pipe (11) via a return pipe (42). A connected return pipe connecting portion (42a) is provided. (28b) is a reinforcing rib, and (29a) is an O-ring.

The electric three-way valve (Ve) is connected to the middle part of the suction pipe (41), and a drain pipe (46) is connected to one end of the three-way valve (Ve), and the flow path of the three-way valve (Ve) is connected. By switching
The bath water from the upper impeller room (33) is removed from the filter medium (43
The bath water is filtered by passing the filter layer formed in c) from top to bottom or backwashing, that is, the bath water from the lower impeller chamber (34) of the bath water circulation pump (P), The filter layer is collapsed by ascending in the filter body (43a), and the filter medium (43c) is caused to flow, so that the filter cake deposited or adhered to the filter medium (43c) is washed and discharged from the drain pipe (46). Being able to choose one of them.

Next, various devices provided in the bathtub body (B) will be described.

Spout nozzles for foot, back, and chest (2) (3) (4)
Uses automatic ejection amount automatic variable ejection nozzles of the same configuration that can automatically change the ejection amount and ejection pressure of bath water, respectively, and will be described with reference to FIG.

The ejection nozzles (2), (3) and (4) are a bottomed cylindrical nozzle body (20) attached to an ejection nozzle connection port (9) opened on the side wall of the bathtub body (B), and the nozzle body. (2
0) into the bathtub body (B) from the valve seat forming cylinder (2
1), an ejection amount adjusting valve element (22) that comes into contact with and separates from behind a valve seat (21a) formed in the valve seat forming cylinder (21), and an ejection amount adjusting valve element (22). Nozzle valve body advance / retreat drive motor (M1) for performing contact / separation operation, and valve seat forming cylinder (21)
And a throat (24) supported swingably at the front of the car. In addition, an intake pipe connecting portion (20b) is opened in the inner peripheral wall at the center of the nozzle body (20), and the inside of the valve seat forming cylinder (21) and the air intake portion (5) are opened via the intake pipe (8). Is communicated. In addition, a strong feed pipe connection (20c) is opened in the inner peripheral wall at the rear of the nozzle body (20),
The inside of the rear part of the valve seat forming cylinder (21) and the forcible pipe for bath water (11)
And the communication.

The nozzle valve advancing / retracting drive motor (M1) is a stepping motor, and a ball screw mechanism (Bs) is interposed between the motor and the ejection amount adjusting valve (22) to provide an ejection amount adjusting valve (B1). 22) can be moved toward and away from the valve seat (21a). (23j) is a valve position sensor comprising a magnet and a magnetic Hall element.

With the above configuration, the bath water from the bath water circulation pump (P) passes through the gap between the valve seat (21a) and the valve body (22) for adjusting the amount of spout, and is spouted from the valve seat (21a). Negative pressure is generated, and air from the air intake (5) can be mixed into the spout bath water. In addition, the operation of the nozzle valve body drive motor (M1) enables the strength of the bath water spout to be increased. Can be adjusted.

Although the ejection nozzles (2), (3), and (4) have the same configuration, the nozzle valve advance / retreat drive motors (M1) of the ejection nozzles (2), (3), and (4) are controlled by the control unit ( C) is individually controlled, so that each of the jet nozzles (2), (3), and (4) can have a different bath water jet form.

As shown in FIG. 8, the air intake section (5) is provided at the edge (1) of the bathtub body (B). The inside of the air intake portion main body (80) is communicated with the outside air by an air intake (82a) that is covered with the lid (82) and formed only outside the lid (82).

The central portion of the bottom surface of the air intake section main body (80) communicates with each of the ejection nozzles (2), (3), and (4) through an intake pipe (8). (92) is a silencer.

The control unit (C) is provided on the substrate (C1), and includes a microprocessor (50) as shown in FIG.
Input / output interface (51) (52) and memory (53)
The input interface (51) has a construction completion confirmation button (b) and a valve body position sensor (23).
j), the temperature sensor (T) and the infrared signal receiver (R1) are connected.

The output interface (52) includes an inverter (I),
Nozzle valve body drive motor (M1), electric three-way valve (V
e) and various display lamps are connected.

The memory (53) controls the motors (M) (M1) and the electric three-way valve (Ve) based on signals from the sensors and signals from the remote controller (R), and In (2), (3) and (4), programs that can execute six types of bath water blow modes and three types of variations for each blow mode are stored.

As shown in FIG. 9, the remote controller (R) includes various switches (R4) for controlling the bubble generation bath (A), such as an ON / OFF switch and each blow mode switch, in front of the bath. A liquid crystal panel (R5) for displaying the operation state of (A) is provided, and an infrared signal transmitting section (R3) is provided at the front end thereof, and an electric signal from each of the above switches is transmitted to each of the switches in advance. Converts to a serial code signal set for each switch, and transmits infrared light as a carrier from the infrared signal transmission unit (R3).

The serial code signal is received by an infrared signal receiving unit (R1) described below, converted into an electric signal, input to the input interface (51) of the control unit (C), and stored in the memory (53) by the input signal. By controlling the operation of the corresponding actuator according to the control program stored in (1), the bubble generating bath (A) can be brought into an operating state corresponding to the operation of each switch.

As shown in FIG. 10, the infrared signal receiving section (R1) includes an operation panel (93) above the lid (82) of the air intake section (5).
The same panel (93) is provided with various switches similar to those of the remote controller (R), operating state display LEDs corresponding to the switches, and a filter washing switch.

With the above configuration, the operation of the actuators such as the pump driving motor (M) and the nozzle valve element driving motor (M1) can be operated by the switch operation of the remote controller (R) or the operation panel (93) on the bath surface. Control
Number of rotation of bath water circulation pump (P), each jet nozzle (2)
(3) By adjusting the opening / closing amount of the ejection amount adjusting valve body (22) in (4) to control the ejection amount and ejection pressure of the bath water ejected from each ejection nozzle, it corresponds to the various blow mode switches. It is possible to select a bath mode of the hot water to be used and its variation.

Further, by turning on / off a filter washing switch provided on the operation panel (93), the electric three-way valve (Ve) is switched for a certain period of time by using a timer function of a control program, and the filter (F) is turned on. Backwashing of filter media can be performed.

Hereinafter, the operation of the bubble generation bath (A) will be described with reference to the flowchart of FIG.

FIG. 11 shows the main routine, in which the power is turned on (20
Then, the nozzle advance / retreat driving motor (M1) and the output frequency of the inverter (I) of all the ejection nozzles (2), (3), (4) are initialized (210).

In the initialized state, the valve body (22) of each of the ejection nozzles (2), (3), and (4) is 6 mm from the fully closed position.
The valve is open so that the bath water can be smoothly supplied and drained.

During the initialization, the bath water circulation pump (P) holds the operation stop state (215), and the control unit (C) operates the pressure sensor (Sp).
And waiting for input from the temperature sensor (T), the temperature sensor (T) detects the temperature of the bath water (220),
If this is within the range of 5 ° C. to 50 ° C. (Y), the state of the operation switch is detected (225), and if it is ON (Y), the bathtub water level is detected from the output of the pressure sensor (Sp). (227),
If the water level is equal to or higher than the water level at which the blow operation can be performed (Y) and the temperature of the bath water is detected by the temperature sensor (T) (230), and if the water temperature at which the blow operation can be performed (Y), various types from the remote controller or the operation panel are used. The subroutine is executed according to the instruction input such as blow operation or filter washing (50).
0).

Next, ON / OFF of the operation switch is detected (995),
If it is ON, (Y), the process returns to step (230), and the execution of the above subroutine is continued.

In step (220), if the water temperature is not the blow operation possible (N), the bath water level is detected (235). If the water temperature is equal to or higher than the blow operation water level (Y), the bath temperature is detected. (237) If the temperature is lower than 5 ° C. (Y), the anti-freezing operation subroutine (300) is executed.

If the temperature of the bath water is not 5 ° C. or less in the step (237) (N), a high water temperature warning (400) is issued and the operation is stopped (215).

If the water level is equal to or lower than the water level at which the blow operation can be performed in the step (235) (N), a water level drop warning (410) is issued and the blow operation is stopped (215).

The water level at which the blow operation can be performed means that the water level of the bath water is at least the water inlet (94) provided in the bathtub body (B), and
It satisfies various conditions such as being higher than the upper end position of the ejection nozzle at the highest point.
The case where the temperature is in the range of 50 ° C to 50 ° C is defined as the water temperature at which the blow operation can be performed.

The blow operation subroutine (500) has substantially the same configuration as that described in Japanese Patent Application No. 1-130611 filed earlier by the present applicant.

In the present invention, in the step (230) set before the blow operation subroutine (500), the temperature of the bath water is detected (230), and if the temperature is not 50 ± 2 ° C. or more (N), the blow When the temperature shifts to the operation subroutine (500) and the temperature is 50 ± 2 ° C. or more (Y), the safety water discharge control (470) is executed before the blow operation subroutine (500) is executed, and then the blow operation is performed. To move to.

The safety water discharge control (470) includes a step of opening only the ejection nozzle (4) on the chest side, and then opening the other ejection nozzles (3) and (4). I) There is a control in which the rising of the number of revolutions of the bath water circulation pump (P) is made gentle to gradually discharge the hot water in the bath water circulation pump (P) and the piping. At the start of the blow operation, the hot water is prevented from suddenly coming into contact with the body of the bather.

That is, as shown in the timing chart of FIG. 12, if the temperature sensor (T) detects a temperature of 50 ± 2 ° C. or more at the time when the operation switch is turned on (t1), the initialization is performed by 6 mm. All the ejection nozzles (2), (3), and (4) that were in the valve open state (t2) were fully closed in 1.6 seconds (t
3), this state is maintained for 0.2 seconds (t4), and then 1.
Open all jet nozzles (2), (3) and (4) to the 6 mm valve open state (t5) in 2 seconds, and then remove only the thorax jet nozzle (4) and remove the foot and dorsal jet nozzle in the shortest time. (2) (3)
Is closed to a valve opening state of 0.05 mm (t6), this state is maintained for about 7 seconds (t7), and then the ejection nozzles (2) and (3) on the foot and the back side are opened to a valve opening state (t8) of 6 mm. Each of the ejection nozzles (2), (3), (4) is opened in a stepwise manner, and the inverter (1) is opened from the time (t9) when all the ejection nozzles (2), (3), (4) are completely closed. ) By controlling the rotation speed of bath water circulation pump (P) from 0 rpm over about 6 seconds
The bath water circulation pump is started by ramping up to 705 rpm (ta), then maintaining this state (tb) for 3 seconds, and then ramping down to 0 rpm (tc) over 3 seconds. (P) and high-temperature water in the piping are gradually discharged into the bathtub body (B).

Then, the bath water circulation pump (P) is stopped (t)
In d), the process returns to the initial stage of the safe water discharge control (470), and the operation switch is in a standby state.

In addition, all the ejection nozzles (2), (3), and (4) are in the valve-open state of 6 mm during the period of the rotation speed start (ta).
This state is a short time, and the bath water circulation pump (P)
Since the number of rotations is low, the discharge of dangerous high-temperature water is safe and safe.

In addition, once the foot and the back-side jet nozzles (2) and (3) were opened to the valve opening state (t5) of 6 mm, the valve was not completely closed but closed to the valve opening state of 0.05 mm (t6). To be
Since the temperature of the bath water flowing through the feet and the back-side jet nozzles (3) and (4) changes rapidly, the valve seat (22) is prevented from biting due to thermal expansion and contraction.

When the thermistor of the temperature sensor (T) is short-circuited or opened, the output of the sensor (T) is equal to or higher than 120 ° C. or lower than −40 ° C. In such a case, the blow operation is stopped. We are trying to ensure safety.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a configuration of a bubble generating bathtub according to the present invention. FIG. 2 is a front view of a functional unit case. FIG. 3 is a block diagram showing a configuration of the inverter. FIG. 4 is a longitudinal sectional view of a bath water circulation pump. FIG. 5 is a sectional view taken along the line II of FIG. FIG. 6 is a longitudinal sectional view of the filter. FIG. 7 is a vertical sectional view of the ejection nozzle. FIG. 8 is a vertical sectional view of an air intake section. FIG. 9 is a front view of a remote controller. FIG. 10 is a front view of an operation panel. FIG. 11 is a flowchart of a main routine. FIG. 12 is a timing chart of the safe water discharge control. (A): Bubble generation bathtub (B): Bathtub body (D): Bathwater circulation flow path (P): Bathwater circulation pump (2) (3) (4): Jet nozzle (5): Air intake section ( 10): Bath hot water suction pipe, (11): Bath hot water pipe (470): Safe water discharge control

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Obata 5-1-1, Kushiamihigashi, Kokuraminami-ku, Kitakyushu-shi, Fukuoka Tokoki Co., Ltd. Kokura Second Factory (72) Inventor Koichi Uchiyama Kitakyushu, Fukuoka 5-1-1, Kamiamihigashi, Kokura-minami-ku, Tokyo Toki Equipment Co., Ltd., Kokura 2nd Factory (72) Inventor: Mitsuaki Hashida 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Equipment Co., Ltd., Chigasaki Factory (72) Inventor Akira Hyoto 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Co., Ltd. Chigasaki Factory (56) References JP-A-2-307450 (JP, A) JP-A-2-307449 (JP, A) JP-A-3-26270 (JP, A) JP-A-2-309965 (JP, A) JP-A-3-18362 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61H 23/00 527

Claims (3)

(57) [Claims] 1. A bath water circulation channel is interposed between a bathtub body and a circulation pump provided outside the bathtub body, and air is sucked in from an air intake portion connected to the bathtub. In a bubble-generating bath tub configured to be able to blow out bubble-containing bath water from a plurality of discharge nozzles provided in the bath tub body, when the bath water temperature is equal to or higher than a predetermined temperature, even if a circulation pump operation start operation is performed, the same high temperature is maintained. An air bubble generating bath tub provided with a safe water discharge control routine for restricting the amount or position of water to be spouted so that hot water does not harm the body. 2. The safe water spouting control routine according to claim 1, wherein the bath water is spouted only from the spout nozzle on the chest side for a predetermined time in response to an instruction to start the bath water spouting operation. A bubble generating bathtub. 3. The safety water discharge control routine according to claim 1 performs motor control for a bath water circulation pump in response to an instruction to start a bath water jetting operation, so that water discharge is performed more slowly than usual. An air bubble generating bath tub characterized by comprising.