JP2827278B2 - 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 jetted out, a filter is connected to the bathwater circulation flow path to purify the bathwater. Such a filter is provided with an air vent pipe for discharging air bubbles mixed in the bath water and excessively supplied bath water.

(C) Problems to be Solved by the Invention However, the separation of the bath water from the air bubbles is not sufficient, and bubbles are mixed in the bath water passing through the filter medium, and pulsation is generated, so that the filter medium rises and the air vent pipe is There is a drawback that it flows out of the machine together with excess bath water.

(D) Means for Solving the Problems The present invention provides a bath comprising a bathtub body, a circulation pump, a bathwater suction flow passage and a bathwater strong feed flow passage interposed between the bathtub body and the circulation pump. A hot water circulation channel, a jet nozzle provided at a discharge part of the bath hot water strong flow channel to the bathtub body, and a filter connected to the circulation pump, and air bubbles are introduced from the jet nozzle into the bathtub body. Able to spout mixed bath water,
In a bubble generating bathtub configured to filter hot water, one end is connected to and connected to the upper part of the filter, and the other end is provided with an air vent pipe opened to the outside air through a valve that can be opened and closed. The present invention relates to a filter device in a bubble generating bath, which is closed in conjunction with the start of the circulation pump and opened in conjunction with the stop of the circulation pump.

(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 center portions of the left and right side walls, and a vertically long concave portion (1b) (1b) having a substantially V-shaped cross section is formed on the side facing the rear wall (back side) of the concave portion (1b) (1b). 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 generation bathtub (A). Inside the case (9), a circulation pump (P) for circulating bath water and a 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 in the infrared sensor.

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) made of a semiconductor material stretched in a sensor case (48a), and one surface of the diaphragm (48b) is connected to a hot water supply pipe ( The diaphragm (48b) is distorted by receiving the pressure in the pipe (11) by communicating with the pipe (11).

The diaphragm (48b) is made of a semiconductor in which impurities are diffused, and as shown in FIG. 5, the diaphragm (48b)
Has a bridge (48d) composed of four strain gauges (48c) having different resistance values depending on strain.

Therefore, when a constant current is passed through the bridge (48d), the diaphragm (48b) is distorted due to pressure fluctuations, and when the resistance value of the strain gauge (48c) changes, the output voltage of the bridge (48d) changes. In other words, the pressure can be detected by calculating backward from this output voltage.

The output voltage is increased by connecting four strain gauges (48c) with a Wheatstone bridge.

In the figure, (48e) is a thick film resistor for temperature compensation built on the diaphragm (48b).

(48f) is a constant voltage circuit, (48g) is a voltage-current conversion circuit that allows a constant current to flow through the bridge (48d) using the constant voltage of the constant voltage circuit (48f), and (48h) is a bridge. (48d) is a differential amplifier for amplifying the output voltage at a constant amplification factor, and (48i) is an amplifier for adjusting the level with the control unit (C) connected to the output terminal (48j).

The output of the pressure detection sensor (48) is AD-converted and input to the control unit (C) described later, whereby the pressure is detected in an extremely large number of stages (to a degree that can be regarded as a continuous amount in practical use). The water level in the bathtub body (1) and the discharge pressure of the circulation pump (P) are detected.

That is, when the circulation pump (P) is stopped, the pressure detected by the pressure detection sensor (48) indicates the head of the bath water level in the bathtub body (1), and the circulation pump (P) ) Is operating, the pressure detected by the pressure detection sensor (48) indicates the sum of the head at the water level and the discharge head of the circulation pump (P). Since the difference between the head and the head at the water level is extremely large, it can be regarded as a discharge head of the circulation pump (P) in practical use.

As described above, the present pressure detection sensor (48) is a non-contact type, and eliminates troubles such as contact corrosion, contact opening / closing hysteresis, and leaf spring set, which were inevitable with the conventional switch type pressure sensor, and has a long 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 that prevents the valve body support rod (23d) from swaying with the ball screw (23c), and (22e) is a peripheral edge of the rear end of the ejection amount adjusting valve body (22).
A bellows-shaped waterproof cover made of a synthetic resin material such as polytetrafluoroethylene or nylon 11 integrally formed with the valve body (22).

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)
Is the same as the cylindrical valve body (88) with its upper edge communicating with the bottom of the inlet section body (80) and the motor (M1) for driving the nozzle valve body reciprocating drive attached to the valve body (88). The valve body drive motor (M2) for adjusting the amount of air bubbles, the valve body support rod (89) attached to the motor (M2), and the tip of the rod (89) are attached to the valve body (88). A valve body (90) that can freely contact and separate from a valve seat (88b) formed at the upper end edge.

A valve position detection sensor having the same configuration as that of the valve body reference position detection sensor (23f) is provided on the valve body drive motor (M2) for adjusting the bubble amount.

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 drive motor (M) is a fully-closed fan-type induction motor controlled by an inverter (I) described later, and a rotation speed detection sensor (6) connected to the control unit (C) on the drive shaft (39). Is arranged.

(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).

In addition, the upper impeller chamber of the circulation pump (P) (33)
As shown in FIG. 10, the suction pipe (41) is connected to the filter (43) through the suction pipe (41), and the suction pipe (32g) connected to the upper impeller chamber (33) is connected to the suction pipe (32g). 41) Through the inside, part of the bath water sucked into the lower impeller chamber (34) is sent to the filter (43), and the filter (43)
The hot water filtered by the filter is sent through the return pipe (42) into the hot water supply pipe (11), and is forced from the lower water discharge port (32f) of the lower impeller chamber (34) into the strong water supply pipe (11). It is made to join the bath water sent.

(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. 11, the filter (43) has an acrylic mesh (43b) stretched at a lower portion in a substantially cylindrical filter body (43a) having upper and lower surfaces closed, and the filter (43b) has an upper surface. The granular filter material (43c) is placed on the filter and the bath water is filtered to the filter body (43a).
The bath water can be filtered by passing the filter medium (43c) downward from above.

(43f) is an inflow port that communicates with the suction pipe (41) and opens on the upper inner surface of the filter body (43a). A baffle (43d) is arranged below the inflow port (43f). The bath water flowing from the pipe (41) into the filter body (43a) is scattered.

Also, (43e) is an air vent pipe, one end of which communicates with the upper part of an air reservoir (43g) provided at the center of the inner surface of the upper wall of the filter body (43a), and a solenoid valve (43o) provided at the other end.
Through the drain to the drain.

The solenoid valve (43o) is controlled by a control unit (C), which will be described later. When the operation of the circulation pump (P) starts, the solenoid valve (43o) is closed at the same time, and the operation of the circulation pump (P) is started. Is stopped and the valve is opened at the same time.

Then, return the pipe (4) to the lower end of the filter body (43a).
One end of 2) is connected and connected, and an electric three-way valve (45) is provided in the middle of the lead-in pipe (41). A drain pipe (46) is connected to one end of the electric three-way valve (45). The connecting pipe (41) and the drain pipe (46) can communicate with each other via the valve (45).

When the electric three-way valve (45) is set in a state where the drain pipe (46) is closed and the suction pipe (41) flows, a part of the hot water flows into the lower stage of the circulation pump (P). Impeller room (34) → Communication channel (32d) → Upper impeller room (33) → Strong filtration path (32c) → Upper spout (32g)
→ Retraction pipe (41) → Electric three-way valve (45) → Sent to the filter (43) via the retraction pipe (41) and filtered.
It passes through the return pipe (42) and joins the bath water strongly fed into the bathtub body (1) through the bath hot water pipe (11).

During the bubble generation operation, the bubble generation bath (A) (43)
When the is operated, air bubbles are mixed in the bath water sucked into the circulation pump (P), and the air bubbles are mixed with the bath water in the filter body (43).
a), the solenoid valve (43o) is closed at the same time as the operation of the circulation pump (P) is started, so that the bubbled bath water flowing into the filter body (43a) is removed from the filter body (43a). In the internal space of (43a), the bath water is separated downward and the air is separated upward, and the only outlet path from the filter body (43a) is the return pipe (42) below the filter body (43a). First, the bath water is discharged outside the filter body (43a) first, and the filter medium (4
Above 3c), almost only air exists.

In such a state, the bath water from the suction pipe (41) is scattered by the baffle (43d), and is poured on the upper surface of the filter medium (43c) as if it were a shower.
The filter medium (43c) is prevented from being discharged out of the filter body (43a) through the air vent pipe (43e).

The air collected in the filter body (43a) joins with the filtered hot bath water via the return pipe (42) and the hot bath water which is strongly fed through the hot bath hot water supply pipe (11).

In addition, the filtration operation is stopped simultaneously with the stop of the operation of the circulation pump (P). In this state, the solenoid valve (43o) is opened to balance the pressure inside the filter body (43a) with the outside air. Therefore, it is possible to prevent the compressed and pressurized air inside the filter body (43a) from flowing back to the bath water circulation flow path (D), and no pulsation is generated at the next operation of the circulation pump (P). .

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

 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 water temperature detection sensor (T) for detecting the temperature of the bath water in the bathtub body (1) is connected.

The output interface (51) includes an inverter (I),
The motor for driving the nozzle valve advance / retreat (M1), the motor for driving the valve for adjusting the amount of air bubbles (M2), and the electric three-way valve (45) are connected.

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 (I) controlled by the control unit (C) and supplied to the pump driving motor (M). It is done by doing.

In particular, a routine for preventing the freezing of the filter (43) is stored in the memory (52) of the control unit (C), and the detection value of the bath water temperature detection sensor (T) is a constant temperature (for example, 5 ° C.). When it falls below, this routine is executed.

That is, when the temperature of the bath water falls below the certain temperature and the water level in the bathtub body (1) detected by the pressure detection sensor (48) is higher than the suction port of the bath water suction pipe (10), the inverter A low-frequency AC output from (I) is output to a pump driving motor (M), and a circulation pump (P) is rotated at a low speed, so that the bath water in the filter body (43a) flows and the bathtub is turned on. The freezing is prevented by heating the bathtub body (1) with the residual heat of the bath water in the body (1).

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 (6)
5) and air pulse blow switch (79), bubble amount increasing / decreasing switches (66) (67), bath water spouting intensity switch (68) (69), cycle increasing / decreasing switch (70) (7)
1) and the pattern switch (72), the pattern switch (73), the pattern pattern switch (74), and the pattern pattern (foot) A switch (75), an abdominal ejection nozzle use pattern switch (76), and a filter washing switch (77) are provided.

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 according to 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, infrared receiving sensor (30b) and air intake 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)
The opening / closing amount and opening / closing speed of the valve, the opening / closing amount and opening / closing speed of the bubble amount control valve (5d) provided in the air intake section (5), and the switching operation of the electric three-way valve (45) can be performed. By adjusting the rotation speed of the pump (P), adjusting the opening and closing amount and opening / closing speed of the valve body (22) for adjusting the ejection amount, adjusting the opening and closing amount and opening / closing speed of the bubble amount adjusting valve (5d), 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 of the amount of bubbles, the strength of the spout bath, and the increase / decrease of the spout bath cycle Can be performed.

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

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.

(F) Effect In the present invention, a bath water circulation flow path including a bathtub body, a circulation pump, a bathwater suction flow path and a bathwater high-pressure flow path interposed between the bathtub body and the circulation pump, A jet nozzle provided at a discharge portion of the bath hot water supply passage to the bathtub main body, and a filter connected to the circulation pump, and jetting a bath containing air bubbles into the bathtub main body from the jet nozzle. In the bubble generation bath tub configured so that the bath water can be filtered,
One end is connected and connected to the upper part of the filter, and the other end is provided with an air vent pipe opened to the outside air through a valve that can be opened and closed.The valve that can be opened and closed is closed in conjunction with the start of the circulation pump. In addition, since the valve is opened in conjunction with the stop of the circulation pump, the following effects are produced.

That is, the valve is closed at the same time as the operation of the circulation pump is started, the bubble-containing bath water flowing into the filter is separated into a lower portion of the bath water and an upper portion of the air inside the filter, and the filter material inside the filter is removed. A space where only air is present can be formed at the top, and bath water can be poured on the upper surface of the filter material like a shower, and the filter material is discharged out of the filter through the air vent pipe. Can be prevented.

In addition, the valve is opened in conjunction with the stop of the circulation pump, that is, the stop of the flow of bath water into the filter, and the pressure inside the filter and the outside air are balanced. It can be prevented from flowing back into the bath water circulation channel,
No pulsation occurs during operation of the circulation pump.

[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 block diagram showing a configuration of the sensor. 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 piping diagram between a circulation pump and a filter. FIG. 11 is a sectional view of a filter. FIG. 12 is a plan view of a remote controller. (A): Bubble generation bath (P): Circulation pump (C): Control unit (D): Bath hot water circulation channel (I): Inverter (2): Foot-side jet nozzle (3): Back-side jet nozzle ( 4): Ventral jet nozzle (10): Bath hot water suction pipe (11): Bath hot water feeding pipe (43): Filter (43e): Air vent pipe (43o): Solenoid valve

Continuation of the front page (72) Inventor Mitsuaki Hashida 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kiki Co., Ltd. Chigasaki Plant (72) Inventor Koichi Uchiyama 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Toto (72) Inventor Kenji Moriyama 2-81-1, Motomura, Chigasaki-shi, Kanagawa Prefecture Tochiki Equipment Co., Ltd. Chigasaki Plant (56) References JP-A-2-249550 (JP, A) JP Hei 2-249549 (JP, A) Actually open sho 59-48629 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61H 23/00

Claims (1)

(57) [Claims] 1. A bath water circulation flow path comprising a bathtub body, a circulation pump, a bathwater suction flow path and a bathwater high-power flow path interposed between the bathtub body and the circulation pump, A jet nozzle provided in a discharge section of the strong feed channel to the bathtub body, and a filter connected to the circulation pump are provided, and the hot water mixed with bubbles can be jetted from the jet nozzle into the bathtub body. Along with
In the bubble generating bathtub configured to be capable of filtering hot water, an air vent pipe is connected to an upper portion of the filter, one end of which is connected to the filter, and the other end is opened to the outside air through a valve that can be opened and closed. A filtering device for closing a circulating pump and opening the circulating pump in response to a stop of the circulating pump.