JP2879762B2 - Filtration device in bubble generating bath - Google Patents

Description

The present invention relates to a filtration device in a bubble generating bath.

(B) Conventional technology Conventionally, a bath water circulation channel including a bath water suction pipe and a bath water high-pressure pipe is interposed between a bathtub body and a circulation pump installed outside the bathtub body. An air intake section is provided in the middle of the hot water supply pipe, and in a bubble generation bathtub in which air bubbles are mixed into the bathtub and the bathwater is ejected, a filter is connected to the bathwater circulation flow path to purify the bathwater. There is something that I did.

(C) Problems to be Solved by the Invention However, while the filter is being used, the filtering material gradually becomes clogged and the filtering capacity is reduced. There is a need to do.

However, since there is no means for informing the user of the state of clogging of the filter medium, the filter is clogged and used in a state where the filtration capacity is reduced, or the cleaning operation is performed more frequently than necessary. However, there was a disadvantage that inefficient use was forced.

(D) Means for Solving the Problems The present invention provides a bath water circulation flow comprising a bath water suction flow path and a bath water forced flow path between a bathtub body and a circulation pump installed outside the bathtub body. A discharge nozzle is provided at the discharge portion of the bath water forced flow path into the bathtub main body, and the hot water mixed with bubbles can be discharged into the bathtub main body by the discharge nozzle, and the circulation pump In a bubble generating bath tub configured to filter the hot water flowing through the hot water circulation channel by communicating with the filtering device, a filter washing switch for returning the hot water to the filtering device and discharging the same to the outside; Notifying means for notifying clogging, a suction pipe for feeding hot water from the hot water circulation channel to the filter, or a return pipe for returning hot water from the filter to the hot water circulation channel. Detecting means for detecting the pressure or flow rate of bath water in the flow path; And a control unit for activating the notification means based on the value detected by the step.

(E) Example Hereinafter, the bubble generating bathtub according to the present invention will be described in detail with reference to the accompanying drawings.

First, the overall configuration of the bubble generating bath according to the present invention will be described.

(A) shown in FIG. 1 and FIG. 2 is a bubble generation bathtub according to the present invention. The bubble generation bathtub (A) includes a front and rear wall of a bathtub body (1) formed in a box shape having an upper surface opening. Foot side, back side, and ventral side jet nozzles on the left and right side walls (2) (2)
(3) (3) (4) (4) are provided in total of six.

The bathtub body (1) has a flange-shaped edge (1a) having a constant width at the periphery, and the air intake section (5) is formed at the edge (1a).
Are formed at substantially central portions of the left and right side walls, and have vertically elongated recesses (1b) and (1b) each having a substantially V-shaped cross section, and the recesses (1b) and (1b) on the side facing the rear wall (back side). The ventral ejection nozzles (4) and (4) are attached to the inclined surface (1'b) toward the center of the rear wall.

Further, a pump protection case (9) is provided outside the bubble generating bath (A). Inside the same case (9), a circulation pump (P) for circulating bath water and the pump (P) are provided. Filter (43) for filtering the bath water circulated by P)
A pump driving motor (M) for driving the pump (P); a motor (M1) for driving the pump (P); ) And a control unit (C) for controlling the driving of the electric three-way valve (45).

Further, a bath water circulation path (D) is interposed between the circulation pump (P) and the bubble generation bath (A).

That is, the bath water circulation flow path (D) includes a bath water suction pipe (10) for sending bath water from the bubble generation bath tank (A) to the circulation pump (P), and the bath pump circulation pipe (P). It is composed of a hot water bath pipe (11) for sending hot water to (A).

And the bath water suction pipe (10) is the bathtub body (1)
One end is opened at the lower part of the pump, and the other end is connected to the water suction port of the circulation pump (P) so that the bath water is sucked into the circulation pump (P). (P)
One end is connected to the water outlet of the nozzle, and the jet nozzles (2) and (3)
The other ends are connected and connected to (4).

In FIG. 1, (7) is an outlet connected to a power source, (30b) is an infrared receiving sensor for receiving infrared rays transmitted from a remote controller (30) described later, and (30b).
c) is a reception indicator lamp provided on the infrared receiving sensor, (F
1) is a washing notice lamp.

Also, as shown in FIG. 3, the circulation pump (P)
A rotation speed detection sensor (6) for detecting the rotation speed of the circulation pump (P) is attached, and the detection result from the sensor (6) is
It is sent to a control unit (C) described later, and the control unit (C)
The number of rotations of the circulation pump (P) is controlled.

Further, as shown in FIG. 3, a pressure detection sensor (48) for detecting the pressure of the bath water pumped through the pipe (11) is attached to the middle part of the hot water bath pipe (11). Sensor (4
The detection result from 8) is input to a control unit (C), which will be described later, and the control unit (C) controls each ejection nozzle (2) (3)
(4) While detecting the pressure of the bath water spouted from
The water level in the bathtub body (1) is detected.

As shown in FIG. 4, the pressure detection sensor (48) has a diaphragm (48b) stretched in a sensor case (48a), and one surface of the diaphragm (48b) communicates with the hot water supply pipe (11). Then, the pressure in the pipe (11) is received, the plunger (48c) is connected to the other surface, and the displacement of the diaphragm (48b) is transmitted to the pressurized conductive rubber (48e) via the pressing body (48d). I am trying to do it.

The pressing body (48d) is urged by the spring (48f), so that the diaphragm (48b) is displaced to a point where the above-mentioned pressure and the urging force of the spring (48f) are balanced. .

As shown in FIG. 5, the pressurized conductive rubber (48e) is configured so that the electric resistance value changes according to the deformation amount of the rubber (48e). By detecting the resistance value of (1), it is possible to detect the pressure in the hot water supply pipe (11).

In particular, since the derivative of the resistance value with respect to the deformation amount changes abruptly with a constant deformation amount as a threshold value (48i), the deformation amount of the pressurized conductive rubber (48e) at the set pressure is determined by the threshold value (4
If it is made to coincide with 8i), a switching output can be obtained with a simple circuit.

As described above, this pressure detection sensor (48) is a non-contact type, eliminating the problems of contact corrosion, contact opening / closing hysteresis, leaf spring set, etc., which were inevitable with the conventional switch type pressure sensor, and the service life. Is long, and accurate and stable pressure detection can be performed.

The jet nozzles (2), (3), and (4) use automatic variable jet nozzles that can change the jet amount and jet pressure of the bath water, respectively, and each jet nozzle (2), (3), (4). Have the same configuration, the foot-side jet nozzle (2) will be described as an example with reference to FIG.

The foot-side jet nozzle (2) fits into the cylindrical nozzle body (20) connected to the foot-side jet nozzle connection port (1g) of the bathtub body (1) and the front part inside the nozzle body (20). Valve body (21), a valve seat (21) formed at the rear of the valve seat forming cylinder (21), and an ejection amount adjusting valve body (22) coming into contact with and separating from the rear from the rear. Nozzle valve body drive motor (M1) for detachably supporting and reciprocating the adjustment valve element (22), and a throat which is swingably supported in front of the valve seat forming cylinder (21). (24).

The nozzle body (20) has a gasket (1
h), is detachably fixed to the wall surface of the bathtub body (1) by a mounting screw (1i) screwed through, and one end of the air intake section (5) is attached to a central peripheral wall of the nozzle body (20). )
The other end of the intake pipe (12) connected to the
On the rear peripheral wall of the nozzle body (20),
1) is connected and connected.

A cylindrical decorative cover (26) having a front portion turned outward is fitted and attached to the front end edge of the nozzle body (20).

The valve seat forming cylinder (21) has a rear end face located in the vicinity of the high-feed pipe connecting portion (20c) inside the nozzle body (20).

In addition, a throat support surface (21c) having a substantially concave spherical surface is formed on the inner peripheral surface of the front portion of the valve seat forming cylinder (21), and the throat (24) having the outer peripheral surface of the base formed into a spherical shape can be swung. Has been fitted. (25) is a throat fixing member.

In the center of the rear end of the valve seat forming cylinder (21), a valve seat (21a)
The valve body (22) for adjusting the ejection amount is brought into contact with and separated from the valve seat (21a), and the opening / closing amount (the ejection amount) of the bath water flow passage (27) is controlled by the valve member (22) for adjusting the ejection amount. And adjust the ejection pressure).

The motor (M1) for driving the nozzle valve forward and backward is mounted on the rear wall (20g) of the nozzle body (20), and has a coil (23a) and a permanent magnet provided in the motor casing (23). The motor (M1) is configured to perform a stepping operation with the armature (23b). The rotation shaft of the motor (M1) is formed as a hollow shaft, and a ball screw (23c) is formed therein. ) Is converted into a linear motion in the axial direction, and the ejection amount adjusting valve element (22) is moved forward and backward through the valve element support rod (23d).

(23g) is a rotation restricting piece for preventing the valve body support rod (23d) from rotating with the ball screw (23c), and (22e) is a rear end periphery of the ejection amount adjusting valve body (22) and an ejection nozzle. A bellows-shaped waterproof cover interposed between the main body (20) and the front surface of the rear wall (20g).

In addition, the motor (M1) for driving the nozzle valve
The magnet (2) attached to the rear end of the valve support rod (23d)
3j) and a valve element reference position detection sensor (23f) consisting of a Hall element (23i), and the magnetic flux passing through the Hall element (23i) that changes according to the advance / retreat operation of the valve element support rod (23d) Control unit (C) that converts the change in density into an electrical change
To detect the deviation of the ejection amount adjusting valve body (22) from the reference position.

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

As shown in FIGS. 7 and 8, the air intake section (5)
Air inlet fitting (1f) at the edge (1a) of the bathtub body (1)
With a rectangular box-shaped air intake unit with a top opening (80)
The upper surface opening of the air intake unit body (80) is covered with a lid (82), and the air is introduced to the outside air through an air intake (82a) formed only outside the lid (82). It communicates with the inside of the air intake section main body (80).

An intake pipe connecting part (83) is provided at the center of the bottom surface of the air intake part body (80), and one end of each of the intake pipes (12) and (12) communicates with the front and rear walls of the connecting part (83). The air that has been connected and taken into the air intake unit body (80) is blown out through each intake pipe (12) (12) through each of the jet nozzles (2) (3)
(4).

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

In the intake pipe connection part (83), there is provided a bubble amount control valve (87) for opening and closing a communication path (86) between the connection part (83) and the intake part body (80). Volume control valve (87)
A cylindrical valve body (88) having an upper edge communicating with the bottom of the air intake body (80), and a nozzle valve advance / retreat drive motor (M1) attached to the valve body (88); A valve body drive motor (M2) of the same configuration, a valve body support rod (89) attached to the motor (M2), and a valve body (88) attached to the tip of the rod (89) And a valve body (90) which can freely contact and separate from a valve seat (88b) formed at the upper end edge of the valve.

A valve position detection sensor (91) having the same configuration as the valve body reference position detection sensor (23f) is provided in the bubble amount adjustment valve body drive motor (M2).

In FIG. 7, (84) is a reactance type silencer,
(85) is a check valve for preventing bath water from flowing back into the intake pipe (12).

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

As shown in FIG. 9, the circulating pump (P) communicates the upper impeller chamber (33) and the lower impeller chamber (34) in the pump casing (32) through a communication passage (32d). The lower impeller chamber (34) is provided with a bath water suction passage (32) provided on one lower side of the pump casing (32).
a) through the bath water suction pipe (10), and through the bath hot water supply path (32b) provided on the other side of the lower part of the pump casing (32), and the bath water strong transfer pipe (11). Then, the filter is communicated with one end of a suction pipe (41) of a filter (43) to be described later via a strong filtration path (32c) provided on one side of the upper impeller chamber (33). (32e) is the water intake,
(32f) indicates the lower outlet, (32g) indicates the upper outlet, (z1) indicates the circulating flow direction, and (z2) indicates the filtration flow direction.

Then, the impeller shaft (35) is suspended from the upper and lower impeller chambers (33) and (34) so as to penetrate the center vertically.
The upper impeller (33a) and the lower impeller (34a) are respectively mounted on the upper and lower impeller chambers (3) on the impeller shaft (35).
3) Mounted coaxially in (34), and linked the impeller shaft (35) to the drive shaft (39) of the pump drive motor (M) mounted integrally and watertightly on the pump casing (32). Has been established.

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

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

With this configuration, the upper and lower impellers (33a) (34a)
When the is rotated, the bath water is turned into the bath water suction pipe (10) → water inlet (32e) → bath water suction passage (32a) → lower impeller room (34)
→ Forced bathing water path (32b) → Lower spout (32f) → Forced feeding into bathtub body (1) via forcible bathing pipe (11).

As shown in FIG. 9, a filter (43) is connected to the upper impeller chamber (33) of the circulating pump (P) through a suction pipe (41) and a return pipe (42). ,
A part of the bath water sucked into the lower impeller chamber (34) is sent to the filter (43) through a suction pipe (41) connected to the upper water outlet (32g) of the upper impeller chamber (33). The bath water filtered by the filter (43) is sent through the return pipe (42) into the bath hot water supply pipe (11), and is sent from the lower water discharge port (32f) of the lower impeller chamber (34). 11) Merge with the bath water that is forcibly sent inside.

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

 Next, the configuration of the filter will be described.

As shown in FIG. 10, the filter (43) has an acrylic mesh (43b) stretched in the lower portion inside the filter body (43a), and a granular filter material (43c) is placed on the mesh (43b). Place
The hot water can be filtered by passing the hot water through the filter medium (43c) downward from above the filter body (43a). (43d) is a baffle for preventing the upper surface of the particulate filter medium (43c) from being scoured at the time of filtering hot water, and for preventing the particulate filter medium (43c) from flowing out at the time of backwashing to be described later. It is.

At the upper end of the filter body (43a), a suction pipe (4
One end of (1) is connected and connected, the return end of the filter body (43a) is connected to one end of the pipe (42), and an electric three-way valve (45) is provided in the middle of the suction pipe (41). A drain pipe (46) is connected to one end of the electric three-way valve (45) so that the drawing pipe (41) and the drain pipe (46) can communicate with each other via the electric three-way valve (45).

When the electric three-way valve (45) is set so that the drain pipe (46) is closed and the suction pipe (41) is in circulation, a part of the bath water is supplied to the lower impeller of the circulating pump (P). Chamber (34) → communication flow path (32d) → upper impeller chamber (33) → strong filtration path (32c) → upper spout (32g) →
The water is sent to the filter (43) via the suction pipe (41), filtered, passed through the return pipe (42), and is forcibly fed into the bathtub body (1) via the hot water supply pipe (11). Join the hot spring bath.

Further, when the electric three-way valve (45) is switched to close the upstream suction pipe (41) and to make the upstream suction pipe (41) communicate with the drain pipe (46),
Part of the bath water in the hot water supply pipe (11) is returned to the return pipe (4
2), the filter medium (43c) is passed upward through the filter medium (43c) from below to above the filter body (43a), so that the filter medium (43c) can be backwashed.

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

In the filter (43), a flow rate sensor (F) as a bath water flow rate detection means is provided in the middle of the suction pipe (41), and a detection value of the flow rate sensor (F) is input to the control unit (C). Then, when the detected value falls below a certain value, the cleaning notice lamp (F1) as a notifying means provided in the infrared receiving sensor (30b) is turned on to prompt the backwashing operation of the filter medium (43c). Like that.

That is, if the filter medium (43c) becomes dirty with filter cake during the filtration of the bath water, the filter medium (43c) becomes more and more clogged and the resistance increases, so that the flow rate gradually decreases.

Therefore, the clogging of the filter medium (43c) can be detected from the decrease in the flow rate, and when the flow rate falls below a certain limit, the filter medium (43c) can be timely performed by performing the backwashing operation.
The inefficient filter (43), in which the filter material (43c) is clogged and the filter capacity is reduced, and the filter is used in a state where the filtration capacity is reduced, or the cleaning operation is performed more frequently than necessary. The use of the filter (43) can be always performed in an efficient state.

In the flow rate sensor (F), a propeller is provided in the flow path of the drawing pipe (41) to detect the flow rate from the rotation speed of the propeller, or a throttle section is provided in the flow path. And the flow rate is detected based on the differential pressure between the upstream side and the downstream side of the throttle section. The point is that the flow rate of the bath water passing through the filter (43) is determined by the filtering material (43c). What is necessary is just to be able to detect with sufficient accuracy necessary for detecting clogging.

Further, the flow rate of the bath water flowing through the retraction pipe (41) is equal to the flow rate of the bath water flowing through the return pipe (42). Therefore, even if the flow rate sensor (F) is provided in the return pipe (42), The same operation and effect as those described above can be obtained.

 Next, the control unit (C) will be described.

As shown in FIG. 3, the control unit (C) includes a microprocessor (MPU) and an input / output interface (50) (5).
1), a memory (52) including a ROM and a RAM, and a timer (53).

The input interface (50) detects the water pressure in the rotational speed detection sensor (6), the valve body reference position detection sensor (23f), the valve position detection sensor (91), and the hot water supply pipe (11). Pressure detection sensor (48), infrared receiving sensor (30
b) A bath temperature detecting sensor (T) for detecting the temperature of the bath water in the bathtub body (1) and a flow rate sensor (F) are connected.

The output interface (51) has an inverter (1),
Connect the motor for nozzle valve advance / retreat drive (M1), motor for driving valve body for air bubble amount adjustment (M2), electric three-way valve (45), and cleaning notice lamp (F1) provided on the infrared receiving sensor (30b). ing.

The memory (52) stores the motors (M) (M1) (M2) and the electric three-way valve (45) based on the output signals from the above-described sensors and the signals from the remote controller (30). A control program for controlling the driving unit is stored.

In particular, in controlling the rotation speed of the circulation pump (P), the frequency of the AC power supply (S) is converted by the inverter (1) controlled by the control unit (C) and supplied to the pump drive motor (M). It is done by doing.

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

As shown in FIG. 11, the remote controller (30) includes an ON / OFF switch (60), a mild blow switch (61), a desired jet mode switch, a finger pressure blow switch (62), and a pulse blow switch (63). ), Massage blow switch (64), wave blow switch (65), air pulse blow switch (79), bubble amount increase / decrease switch (66) (67), bath water spouting high / low side switch (68) (69) ) And period increase / decrease switch (70)
(71) and a pattern switch (72) for using all ejection nozzles, which is a changeover switch for using a favorite ejection nozzle.
Circulation use pattern switch (73), back side nozzle use pattern switch (74), foot side nozzle use pattern switch (75), and ventral side nozzle use pattern switch (76), and filter washing switch (77) And are arranged.

Then, by turning on the ON / OFF switch (60), the control unit (C) is activated.

Also, (78) is a power lamp, (60a) is an operation display lamp, (61a) (62a) (63a) (64a) (65a) (79a) are mode switch display lamps, and (66a) (67a) are air bubbles Amount setting lamps, (68a) and (69a) are bathwater jet intensity setting lamps,
(70a) and (71a) are bath water ejection cycle setting lamps, (72a) and (7
3a) (74a), (75a) and (76a) are discharge nozzle use pattern setting lamps, and (77a) is a filter cleaning switch display lamp.

Further, as shown in FIG. 11, the remote controller (30) includes an infrared irradiator (30a) at a front end thereof, and operates a switch to operate a preset multi-frequency seattone modulation system (MFTM).
An infrared signal modulated in accordance with the operation of each switch is transmitted from the infrared irradiator (30a), and the infrared signal is received by the infrared receiving sensor (30b) (see FIG. 1) installed in the bathroom, The desired driving device is driven based on the control program sent to the input interface (50) of the control section (C) and read from the memory (52).

In addition, the remote controller (30) is configured to be able to float on the surface of the bath so that a bather can operate in a bathing state.

In addition, an infrared receiving sensor (30b) and an air suction unit (5)
May be integrally formed.

With the above configuration, the air bubble generation bath (A) is controlled by the remote controller (30) operable on the surface of the bath water, through the control unit (C), the rotation speed of the circulation pump (P), and the ejection nozzles (2) ( 3) A valve body (22) for adjusting the ejection amount provided in (4)
Opening and closing speed and opening and closing speed of the air intake unit (5), the opening and closing amount and opening and closing speed of the bubble amount adjusting valve (87) provided in the air intake unit (5), and the switching operation of the electric three-way valve (45). By adjusting the rotation speed of the pump (P), adjusting the opening / closing amount and opening / closing speed of the ejection amount adjusting valve element (22), adjusting the opening / closing amount and opening / closing speed of the bubble amount adjusting valve (87), and a combination thereof. , Six types of jet modes (mild blow, finger pressure blow, pulse blow, massage blow,
Wave blow and air pulse blow) can be set, and each jet mode can be set by turning on / off the favorite jet mode switches (61) to (65) provided on the remote controller (30).
It can be selected by the OFF operation.

In addition, for each mode, the bubble amount increase / decrease switches (66) and (67) and the bath water jet strong / weak side switch (68)
By turning ON / OFF the (69) and the cycle increase / decrease switches (70) and (71), respectively, the increase / decrease adjustment of the bubble amount, the strength adjustment of the spout bath, and the increase / decrease adjustment of the spout bath cycle Can be performed.

Further, by turning on / off each of the changeover switches (72) to (76) to the favorite ejection nozzle use pattern, the use pattern of the six ejection nozzles to which the above-mentioned ejection mode is applied can be selected. I have to.

Further, by turning on and off the filter washing switch (77), the electric three-way valve (45) is switched to operate, so that the filter (43) can be backwashed.

That is, when the filter washing switch (77) of the remote controller (30) is operated, the electric three-way valve (45) performs a switching operation to close the upstream suction pipe (41), and the downstream suction pipe (41). ) Communicates with the drain pipe (46), so that the bath water is forcibly supplied by the bath water (11) → return pipe (42) → filter body (43a) → downstream suction pipe (41) → electric three-way valve (45) → The drainage pipe (46) flows in this order. At this time, the water flows upward from the bottom through the filter body (43a), and the filtering medium (43c) moves by this water flow, and the water is filtered during the filtration of the bath water. The filter cake adhered and deposited on the material (43c) can be discharged out of the machine together with the bath water from the drain pipe (46).

In addition, the timer is started simultaneously with the switching of the electric three-way valve (45), and when the set time of the timer elapses, the circulation pump (P) is stopped, and the electric three-way valve (45) is returned to the original position to perform backwashing. Terminate.

In particular, when the cleaning notice lamp (F1) provided on the infrared receiving sensor (30b) is turned on, the above-described cleaning operation is performed as quickly as possible, so that the filter is clogged and the filtering capacity is reduced. It is possible to prevent the cleaning operation from being used as it is or performing the cleaning operation more frequently than necessary.

(F) Effect According to the present invention, a flow rate sensor is provided on either a suction pipe for feeding bath water into the filter or a return pipe for returning bath water from the filter to the bath circulation path. When the detection value of the flow rate sensor falls below a certain value, by configuring to notify the fact, by operating the filter washing switch, it is possible to wash the filter in a timely manner,
The filter can always be used in an efficient state.

[Brief description of the drawings]

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 view of a conceptual configuration of the bubble generating bath. FIG. 4 is an explanatory sectional view of a pressure detection sensor. FIG. 5 is a graph showing the relationship between the amount of deformation of the pressurized conductive rubber and the electric resistance value. FIG. 6 is an enlarged sectional view of an ejection nozzle. FIG. 7 is a piping diagram of an intake pipe. FIG. 8 is an enlarged sectional view of an air intake section. FIG. 9 is a partially cutaway front view of a pump driving motor and a circulation pump. FIG. 10 is a sectional view of a filter. FIG. 11 is a plan view of a remote controller. (A): Bubble generation bathtub (P): Circulation pump (C): Control unit (D): Bathwater circulation flow path (T): Bathwater temperature detection sensor (1): Bathtub body (2): Foot side ejection Nozzle (3): Back side jet nozzle (4): Ventral side jet nozzle (10): Bath hot water suction pipe (11): Bath hot water pipe (48): Pressure detection sensor

Continued on the front page (72) Inventor Mitsuaki Hashida 2-81-1, Honmura, Chigasaki-shi, Kanagawa Pref. Tochiki Kiki Co., Ltd. Chigasaki Plant (72) Inventor Koichi Uchiyama 2-81-1, Honmura, Chigasaki-shi, Kanagawa T 陶 h 陶(72) Inventor Kenji Moriyama 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Plant (56) References Japanese Utility Model No. 2-127292 (JP, U) (58) ) Surveyed field (Int. Cl. ⁶ , DB name) A61H 23/00 521

Claims (1)

(57) [Claims] A bath water circulation flow path comprising a bath water suction flow path and a bath water forced flow path is interposed between a bath tub body and a circulation pump installed outside the bath tub body, An ejection nozzle is provided at a discharge portion of the flow path into the bathtub body, and the bathwater mixed with air bubbles can be ejected into the bathtub body by the ejection nozzle. In a bubble generation bathtub configured to filter bathwater flowing through the circulation flow path, a filter washing switch for backflowing the bathwater to the filter and discharging the same to the outside, and a notification unit for notifying the filter of clogging, A suction pipe for feeding hot water from the hot water circulation channel to the filter,
Or, a detecting means for detecting the pressure or the flow rate of the bath water in the flow path, which is provided in any of the return pipes for returning the bath water from the filter to the bath water circulation flow path, based on a value detected by the detection means And a control unit for operating the notifying means.