JP4313634B2 - Bubble bath with stage lighting and control method thereof - Google Patents

Description

  The present invention combines a high-intensity light-emitting diode (generally abbreviated as LED, so in this specification, the light-emitting diode is abbreviated as LED) and a bubble bath, and a bathroom with high performance by lighting. The present invention relates to a bubble tub with effect lighting capable of obtaining a space and a control method thereof.

In recent years, high-brightness LEDs have been commercially available, and are smaller than fluorescent and incandescent lamps, can be used at low temperatures and low voltages, and can be used semipermanently with low energy. It is used in various fields.
In addition, in the bathtub, by providing a light emitting part by the LED in the submerged part of the bathtub that is difficult to see directly in the bathing posture state, the bathtub light that can effectively illuminate the water in the bathtub without directly seeing the light of the LED An illumination device has been proposed (see, for example, Patent Document 1).
In this patent document 1,
(1) When the light emitting part is provided on the inner wall surface of the bathtub, the opposing wall surface is efficiently irradiated, and in the normal bathing posture, the LED point light source cannot be seen in the bather's field of view and the LED does not feel dazzling Only the walls and bubbles irradiated by the can be visually recognized, and a comfortable bathing state can be obtained.
(2) If it is installed upward on the bottom or armrest step, etc., the water surface can be efficiently irradiated with light to enhance the effect of the effect, and the fluctuation of the water surface in the bathtub is projected on the ceiling surface, A more comfortable performance effect can be obtained.
(3) By providing the light emitting part in a place where it is difficult to block by the body in the normal bathing posture of the backrest side wall of the bathtub, especially when there is a bubble jet on the backrest side, the flowing water stream is effectively illuminated, The production effect can be improved satisfactorily.
A lighting effect for bathers of lighting by LED etc. has been proposed.

  In addition, as a jet nozzle nozzle with illumination, which has a high-class feeling and can simultaneously recover physical fatigue and mental relaxation, a plurality of fluid (for example, air) injection and illumination light irradiation nozzles on the head A cap having a hollow interior, a front end opening connected to the hollow interior of the cap, and a rear end opening connected to a fluid supply source (for example, a blower) that is driven and controlled. A fluid supply member (for example, a blower tube) and an optical member (for example, a plurality of optical fibers) whose front end face is directed to the hollow interior of the cap and whose rear end face is driven and controlled. And a fixing member that fixes and supports the fluid supply member (blower pipe) and the optical member (optical fiber group) on the bottom wall of the bathtub container, Which is characterized by comprising attached to a plurality of nozzles Toru設 the bottom wall of the vessel it has been proposed (e.g., see Patent Document 2.).

  This patent document 2 states that “when hot water is stored in the bathtub container 11 and the switch 60 disposed in the bathroom is turned on, the halogen lamp 33 of the light source device 30 emits light via the control device 50 and the motor 31. Is driven to rotate the color filter disk 32, and the light passing through each color filter is applied to the end face of the end portion 80a of the fiber cable 80 while changing in order (for example, in the order of red, blue, green, and yellow). This light is guided to the tip end portion 21a through the optical fiber group 21, and is irradiated from the hollow portion 23c of the cap 23 to the hot water in the bathtub container 11 through the nozzles 23a and 23b. If you do, the color of the hot water will change one after another, and each color will shine brightly, so the bather will feel like you are bathing in a fantastic world and feel extremely relaxed Therefore, according to the main bath 10, the mental relaxation effect can be enhanced "(paragraph 0026). As described in paragraph 0026, the mental relaxation effect due to the color change of hot water is obtained. It is what

  "When the switch 60 is turned on, the blower 40 is driven via the control device 50, and at the same time, the valve 70 is opened and air is sent to the blower pipe 22. The air sent to this blower pipe 22 is shown in FIG. As shown by a dotted line and an arrow F, the hollow portion 23c of the cap 23 passes from the hollow portion 26a of the foot 26 to the air guide path 24d of the body portion 24B of the body 24 and the air nozzles 24a and 24b of the head portion 24H of the body 24. Then, it is further injected into the hot water in the bathtub container 11 through the nozzles 23a and 23b at the head of the cap 23. When air is thus injected from the bottom wall 13 of the bathtub container 11, it is directed toward the liquid level. The bubbles rise up and eventually disappear at the liquid level, and the generation and disappearance of such bubbles generate negative ions that act on the bather. In addition, there is an effect that activation is achieved, and as bubbles are generated, a liquid flow is generated in the bathtub, and this flow gives the body a gentle irritation different from the jet bath. Since it has a massage effect in combination with the thermal effect, blood circulation is improved and physical fatigue is recovered. ”(Paragraph 0027), air is injected. The physical fatigue recovery effect is achieved by stimulation by generation of negative ions by the liquid and generation of liquid flow in the bathtub.

JP 2001-309865 A (paragraphs 0003 to 0013, FIGS. 1 to 4) JP 2003-10274 A (paragraphs 0008 to 0035, FIGS. 1 to 6)

In the bathtub production lighting device described in Patent Document 1, since the light emitting part by the LED is provided in the submerged portion of the bathtub that is difficult for the bather to directly view in the normal bathing posture state, the LED of the LED is in the bather's field of view. Although it is described that a comfortable bathing state with LED lighting can be obtained without seeing a point light source and feeling dazzling, fluctuations in the wall, bubbles and water surface irradiated by the LED are visually recognized, and fluctuations in the water surface Is only projected on the ceiling surface, there is no brightness as illumination, and there is a problem that the illumination effect by the irradiation of LED light cannot be obtained unless the illumination in the bathroom is darkened.
In addition, it is described that the light emitting part is provided on the back side wall surface of the bathtub, and particularly when there is a bubble jet on the back side, the flowing water stream is effectively illuminated, and the production effect can be improved satisfactorily. The bubble jet provided on the backrest side is a jet water flow containing a large amount of air, and even if the LED is irradiated, the LED light hits the bubble jet and scatters, and the bubble jet with a momentum is brightly illuminated, so it is relaxed There is no mental relaxation effect.

Further, according to the embodiment of the illuminated jet nozzle type bathtub described in Patent Document 2, the nozzles 23a and 23b provided in the cap 23 have a diameter of about several millimeters, and the number of nozzles is one. There are 10 caps, and 8 caps are provided on the bottom wall of the bathtub.
The bubbles ejected from such a large nozzle hole have a large bubble diameter, and since the bubbles are ejected on the entire surface of the bathtub, the hot water in the bathtub is filled with bubbles, and the bubbles break one after another on the water surface. The water surface will rippling.
Therefore, even if light is irradiated into the hot water in this state, the hot water only changes to the color of light. In Patent Document 2, the color filter disc is rotated so that the color of light changes, so that the color of hot water changes to shine brightly.
However, in order to change the color of light, it is necessary to rotate the color filter disk or irradiate through an optical fiber. Moreover, since the water surface undulates, the inside of the hot water is difficult to see, and the swaying light is not projected on the wall or ceiling of the bathroom. In addition, since light is guided by an optical fiber, there are problems such as a large light attenuation and a need for a strong light source.

  The problem of the present invention is that the irradiated light can be seen shining in a swaying state by irradiating the bubbles rising in the water, and the irradiated light is transmitted through the bubbles, and the transmitted light is transmitted to the wall or ceiling. By observing the image projected on the surface, it is possible to provide a bathroom space that has a high mental relaxation effect and a relatively large brightness due to the illumination of the LED.

The bubble tub with effect lighting according to the first aspect of the present invention is an annular bubble jet nozzle in which a plurality of light emitting diodes are incorporated on the bottom of the bathtub at a position where the bubbles float vertically upward in a normal bathing posture. Is mounted in the center of the nozzle so that a light-emitting diode containing a transparent container and having a luminance of 30 candela or more per nozzle is emitted upward. A bubble tub with effect lighting in which a porous plate having a hole diameter of 15 to 100 μm is mounted at the outlet, and the bubble jet nozzle has an annular air passage formed by an annular inner cylinder and an outer cylinder. with the bottom surface of the air passage is an inclined surface, and wherein the compressed air supply port to the lower end position of the inclined surface is al provided.

The control method of the effect illuminated bubble bath of the present invention described in claim 2 is a control method for directing illuminated bubble bath of claim 1 Symbol mounting an annular bubble light emitting diode (LED) is incorporated For a few seconds after turning on the power of the ejection nozzle, the bubble ejection amount is set large, and after the illuminance of the incandescent lamp of the bathroom lighting is gradually reduced, the light emitting diode (LED) is energized and emitted. It is controlled as follows.

The control method of the effect illuminated bubble bath of the present invention of claim 3, wherein, in the control method of the effect illuminated bubble bath as claimed in claim 2, after power emission of a light emitting diode (LED), bubble jet nozzles bubbles The ejection amount is decreased, and the small bubbles are controlled to be in a state of rising by shaking.

In the bubble tub with effect lighting according to the first aspect of the present invention, since the annular bubble ejection nozzle is mounted on the bottom surface of the bathtub so as to face upward, the bubbles emerging from the nozzle rise in an annular shape toward the top of the bathtub. Since a light emitting diode (LED) in a transparent container is incorporated in the central part of the nozzle so as to emit light upward, the LED is irradiated upward to the central part of the bubble rising in a ring shape from the nozzle. As a result, the LED light is blocked by the rising bubbles and the glare is reduced. In addition, the LED light illuminates the lower surface of the bubble that rises in a ring, and you can see the illuminated bubble rising while it fluctuates, and the light that is refracted and reflected by the bubble changes the color of the water, creating a fantastic atmosphere. . Further, the transmitted light that has passed through the bubbles is reflected on the wall surface and ceiling surface by fluctuations of rising bubbles and fluctuations of the water surface caused by bubbles breaking on the water surface.
Therefore, the bather can see the illuminated bubbles rising and shaking, and the water coloring and the transmitted light swaying on the wall and ceiling without feeling dazzling. In addition to the physical relaxation effect, a mental relaxation effect can be obtained, which can heal both mind and body.

Furthermore, light-emitting diodes (LED) because the high intensity of more luminance 30 candelas per nozzle will be fluctuations in the sharp light emerges, it is improved even more lighting effects.

Further, since the porous plate hole diameter is 15~100μm in spout of bubble ejection nozzle is mounted, will be rising up a large number of bubbles small, the glare is reduced more, by foam-breaking The ripples on the surface of the water are small, and the fluctuations of bubbles in the water and the reflection of light fluctuations on the walls and ceiling surface become clearer.

Further, in the bathing position normal to the tub bottom position the bubbles float upward in the vertical direction, since the bubble jet nozzles of a plurality of light emitting diodes annular (LED) is incorporated is mounted, the bubble Fluctuation and reflection on the wall and ceiling are emphasized, and the mental relaxation effect by lighting becomes more prominent.

Further, in the bubble ejection nozzle, an annular air passage is formed by the annular inner cylinder body and the outer cylinder body, the bottom surface of the air passage is an inclined surface, and a compressed air supply port is provided at the lower end position of the inclined surface. Since it is provided, when the supply of compressed air from the compressed air supply tube 3 is stopped, even if bath water enters the air passage, it is discharged without leaving the infiltrated water when supplying compressed air. it can.

According to a second aspect of the present invention, there is provided a method for controlling a bubble tub with effect lighting, wherein the bubble ejection amount is set large for one to several seconds after the annular bubble ejection nozzle incorporating the light emitting diode is turned on. In addition, after the illuminance of the incandescent lamp in the bathroom is gradually reduced, it is controlled so that the light emitting diode (LED) is energized and emitted, so the bath water that has entered the small holes of the bubble ejection nozzle is eliminated. In addition, it is possible to realize uniform bubble ejection, and it is possible to start the illumination with the LED while eliminating the glare caused by the LED while keeping the brightness of the bathroom at the optimum brightness.

According to a third aspect of the present invention, there is provided a method for controlling a bubble tub with effect lighting, wherein after the light emitting diode (LED) is energized and emitted, the bubble ejection amount of the bubble ejection nozzle is reduced, and the small bubbles are swung up. Since it is controlled, optimal light fluctuation can be realized while eliminating glare caused by the LED, and a mental relaxation effect can be obtained.

  FIG. 1 is a longitudinal cross-sectional view showing an example of a light emitting diode (LED) built-in bubble ejection nozzle used in a bubble tub with effect lighting according to the present invention, and FIG. 2 is a plan view of FIG.

  1 and 2, 1 is a bubble jet nozzle, 2 is a light emitting diode (LED) housed in a transparent container 21, and the transparent container 21 is incorporated in a watertight state at the center of the annular cylindrical bubble jet nozzle 1. Thus, an annular bubble ejection nozzle 1 in which the LED 2 is incorporated is configured. The bubble ejection nozzle 1 has an annular air passage 13 formed by an annular inner cylinder 11 and an outer cylinder 12, and an annular porous plate 14 is detachably attached to the upper portion of the air passage 13 by a cover 15. A tube joint 31 for connecting the compressed air supply tube 3 is provided at the lower end of the cylindrical body 12.

The bubble ejection nozzle 1 is provided with an inclination in which the height of the outer cylinder 12 on the side where the tube joint 31 is provided is long and the height on the opposite side is shortened. By providing the outer cylinder 12 with the inclination in this manner, it becomes possible to put a nut 17 (described later) on the bubble ejection nozzle 1 and to be engaged with the male screw 12a of the outer cylinder 12, and to change the thickness of the bathtub bottom surface 4 And the overall height of the bubble ejection nozzle 1 can be suppressed.
Further, when the supply of compressed air from the compressed air supply tube 3 is stopped, bath water may enter the air passage 13, but by inclining the outer cylinder 12 and inclining the air passage 13, When compressed air is supplied, it can be discharged without leaving intrusion water.

  Further, a flange 16 is provided on the outer periphery of the upper end of the outer cylinder 12 of the bubble ejection nozzle 1, and a male screw 12 a is formed on the outer periphery of the outer cylinder 12, and a mounting nut 17 is screwed to the male screw 12 a. The bubble ejection nozzle 1 is inserted into the hole 41 provided in the bathtub bottom surface 4 from the inner side of the bathtub, and the bowl 16 is applied to the bathtub bottom surface 4 via the U packing 42, and the mounting nut 17 is externally threaded from the lower side. It is screwed to 12a and attached to the U packing 42 by screwing it through the slip packing 43.

Incorporation of the transparent container 21 into the bubble ejection nozzle 1 is double-sealed by an O-ring 22 and an annular flat packing 23 and screwed together so as not to leak water.
The O-ring 22 is provided so as to seal between the inner surface of the inner cylinder 11 of the bubble ejection nozzle 1 and the upper portion of the outer surface of the transparent container 21. In the illustrated example, the O-ring groove is provided on the transparent container 21 side, but may be provided on the inner cylinder 11 side. The annular flat packing 23 is provided between the lower end surface of the inner cylinder 11 of the bubble ejection nozzle 1 and the upper surface of the enlarged diameter portion 24 of the transparent container 21.
An internal thread 11a is engraved on the inner surface of the inner cylinder 11 of the bubble ejection nozzle 1, and an external thread 21a is engraved on the outer peripheral surface of the transparent container 21, so that the transparent container 21 is inserted into the bubble ejection nozzle from the lower side of the bathtub. 1 is inserted and screwed together.

In addition, the LED 2 is stored in the transparent container 21 so that the transparent container 21 has an enlarged diameter portion 24 for accommodating the LED 2 and is accommodated in the enlarged diameter portion 24. In the illustrated example, a female screw 24 a is engraved on the inner peripheral surface of the enlarged diameter portion 24, and the lid 25 of the transparent container 21 is packed on the female screw 24 a by screwing a male screw 25 a engraved on the outer peripheral surface of the lid 25. The LED 2 is fixed to the inner surface of the lid 25, and the lid 25 is mounted by screwing the lid 25 onto the enlarged diameter portion 24, and the LED 2 is also a transparent container 21. It is fixed inside and stored.
An LED mounting bracket 26 is provided inside the lid 25, and the LED 2 is mounted and fixed to the bracket 26 with a tapping screw. The lid 25 is provided with a wiring bush 27 for inserting a wiring for energizing the LED 2 in a watertight state.

The LED 2 used in the present invention has a high brightness, and preferably has a brightness of 30 candela or more. Various colors such as red, blue, and green can be used. A transparent color film can be stretched on the inner surface of the transparent container 21 to produce color light.
The LED 2 housed in the transparent container 21 may have a luminance of 30 candela or more with one lamp, or may have a luminance of 30 candela or more by combining multiple LEDs with low luminance.

In addition, compressed air is supplied from the compressed air supply tube 3 connected to the tube joint 31 to the bubble ejection nozzle 1, and is ejected as bubbles from the porous plate 14 at the upper end through the air passage 13 into the bath water. Is done.
The porous plate 14 is a sintered body of resin beads or porous ceramic having a pore diameter of 15 to 100 μm, and can substantially uniformly eject an air amount of about 4 to 5 liters / minute by adjusting the air pressure. Are preferably used. When the amount of air increases, the air bubbles scatter the LED light, and it becomes impossible to see the LED light reflected on the bathroom ceiling and the wall surface and the air bubbles rising up.

  The porous plate 14 is attached by being pressed by a cover 15. A female screw 12b is formed on the inner surface of the outer cylindrical body 12 of the bubble jet nozzle 1, and a male screw 15a formed on the outer peripheral surface of the cover 15 is screwed onto the female screw 12b. The porous plate 14 can be taken out by removing the cover 15, and the porous plate 14 can be cleaned or replaced.

  Further, the porous plate 14 may have a uniform thickness, but if the thickness is uniform, bubbles that collide with the cover 15 through the porous plate 14 are combined to generate bubbles having a large diameter. It becomes easy. Therefore, if an annular recess 14a is provided on the air passage 13 side in the middle of the width of the porous plate 14 and the air pressure passing through this portion is reduced, uniform bubbles are generated from the entire surface of the porous plate 14 ejected into the bath water. Can be generated. 14b is a packing.

  And such LED incorporation bubble ejection nozzle 1 is mounted | worn so that a bubble may be ejected upwards on the bathtub bottom face. As the mounting position of the nozzle 1, in the normal bathing posture of the bather, the bubble floats vertically upward, that is, the bubble spouted from the nozzle 1 even when the bather is bathing in the normal bathing posture. Is preferably installed in a position where it stands up without being obstructed by the bather's body. In addition, it is preferable that a plurality of nozzles 1 are mounted, for example, 3 to 6 nozzles on both sides of the bathtub or between both feet.

  In such a bubble tub with production lighting, a lighting switch is provided in a washroom outside the bathroom, and control boxes such as bathroom lamps (fluorescent lamps and incandescent lamps), LED in the bubble tub, and an air pump for generating bubbles are provided. After that, it is wired to each device, and the remote control mounted on the wall of the bathroom is operated to turn on / off / adjust the lighting in the room, turn on / off / adjust the LED, turn on / off the air pump, and adjust the pressure (bubbles) (Adjustment of amount) and the like are controlled. The control box is set in an empty space such as the ceiling of the bathroom unit, wired to the bathroom lighting and remote control panel, wired to the LED 2 of the bubble nozzle 1 through the bathroom floor, and compressed from the air pump. Air is piped to the bubble ejection nozzle 1 by a tube 3.

Next, the control method of the bubble tub with effect lighting arrange | positioned as mentioned above is demonstrated. FIG. 3 is a time chart showing the operation state of each device after the bubble tub switch is turned on from the state in which the bathroom lighting switch of the remote controller is turned on in order to start the operation of the bubble tub with effect lighting of the present invention.
After the bubble tub switch is turned on, the fluorescent lamp of the room lighting is immediately turned off, and the incandescent lamp is dimmed so that the brightness becomes 30% in 2 seconds after being turned on. Further, from the bubble ejection nozzle 1, the bubble water is ejected at a large air volume level (35 liters / minute of ejection air) at the same time when the bubble tub switch is turned on, and bath water entering the air passage 13 of the bubble ejection nozzle 1 is entered. Are ejected through the porous plate 14 together with bubbles. After the large air amount is ejected for 5 seconds, the air amount is reduced to a proper air amount level (13 liters / minute). When the air amount is reduced to an appropriate air amount level by this large air amount ejection, uniform fine bubbles rise from the porous plate 14 of each bubble ejection nozzle 1.

  The LED 2 of the bubble ejection nozzle 1 is turned on 2 seconds after the bubble bathtub switch is turned on. When the LED 2 is turned on after the fluorescent lamp is turned off and the incandescent lamp is dimmed to 30%, a change at the time of lighting can be felt strongly, and high performance can be obtained. Further, since the amount of bubbles is adjusted to an appropriate amount after 3 seconds, the bubbles are colored with the LED light, and the bubbles are colored and rise while fluctuating, so that it can be visually relaxed.

In the time chart of FIG. 3, the switch to the bathroom lighting mode is automatically made after 15 minutes have passed since the bubble bathtub switch was turned on.
FIG. 4 shows a time chart when the bathroom lighting switch of the remote control is turned on during the automatic switching or the bubble bathtub mode.
Simultaneously with the switching, the incandescent lamp is dimmed so that the brightness becomes 100% in 2 seconds, and the fluorescent lamp is turned on after 2 seconds. Further, the ejection of bubbles from the bubble ejection nozzle 1 stops, and the LED 2 is also turned off. As described above, the illumination in the bathroom is maintained by turning off the LED 2 after increasing the illuminance of the incandescent lamp, and the bather is not worried. Moreover, in order to prevent the glare of LED2, it is preferable to stop the bubble ejection from the bubble ejection nozzle 1 after the LED2 is turned off.
In addition, an LED (indicator light) indicating whether the operation is in bubble bath mode or bathroom lighting mode is arranged on the remote control operation panel, and a push button switch for performing bubble bath operation or bathroom lighting operation is also arranged. ing.

In addition, since the bubble jet nozzle 1 having the porous plate 14 is mounted on the bathtub bottom surface 4, when washing the bathtub, the detergent is prevented from flowing into the nozzle, and the remaining water is discharged at the end of washing. In order not to remain in the tub, air at a large air amount level (35 liters / minute) is ejected from the bubble ejection nozzle 1 when the bathtub is washed.
For this reason, the remote control is provided with a cleaning switch and an LED. When the switch is pressed, a large amount of air is blown from the bubble ejection nozzle, and when the switch is pressed, the LED blinks and the cleaning ends. It is set to stop automatically after a minute.

In the above embodiment, the structure in which the LED 2 containing the transparent container 21 is incorporated in the bubble ejection nozzle 1 has been described. However, as the structure in which the LED is incorporated in the bubble ejection nozzle body in which the bubble ejection nozzle 1 and the transparent container 21 are integrated. Also good.
Moreover, in order to increase the intensity | strength of the upper surface (surface exposed to the floor surface of a bathtub) of the transparent container 21, you may comprise with a tempered glass or a transparent resin board.

It is a longitudinal cross-sectional view which shows an example of the light emitting diode (LED) built-in bubble jet nozzle used for the bubble bathtub with effect lighting of this invention in the state attached to the bathtub bottom face. It is a top view of FIG. It is a time chart which shows the operation state of each apparatus after turning on a bubble bathtub switch from the state of the bathroom lighting switch on of a remote control in order to start operation | movement of the bubble bathtub with effect lighting of this invention. It is a time chart which shows the operation state of each apparatus when changing the bubble bathtub switch of FIG. 3 from the state of ON to the state of bathroom lighting switch ON.

DESCRIPTION OF SYMBOLS 1 Bubble jet nozzle 11 Inner cylinder 12 Outer cylinder 13 Air passage 14 Porous board 14a Annular recessed part 15 Cover 16 鍔 17 Mounting nut 2 LED
DESCRIPTION OF SYMBOLS 21 Transparent container 24 Expanded-diameter part 25 Lid 3 Compressed air supply tube 4 Bath bottom face 41 Hole

Claims (3)

In a normal bathing posture, an annular bubble ejection nozzle incorporating a plurality of light emitting diodes is mounted facing upward on the bottom of the bathtub where the bubbles float vertically upward.
In the central part of the nozzle, a light-emitting diode that is contained in a transparent container and has a luminance of 30 candela per nozzle is incorporated so as to emit light upward.
A bubble tub with effect lighting in which a porous plate having a hole diameter of 15 to 100 μm is attached to a jet outlet of the bubble jet nozzle,
The bubble jet nozzle has an annular air passage formed by an annular inner cylinder and an outer cylinder, an inclined bottom surface of the air passage, and a compressed air supply port provided at the lower end of the inclined surface. director lighted tub with bubbles, characterized in that are et al.   It is a control method of the bubble tub with effect lighting of Claim 1, Comprising: While turning on the power of the cyclic | annular bubble ejection nozzle in which the light emitting diode was incorporated, the bubble ejection amount is set large for 1 to several seconds. A method for controlling a bubble tub with effect lighting, characterized in that after the illuminance of an incandescent lamp in bathroom lighting is gradually reduced, the light emitting diode is controlled to emit light. The method for controlling a bubble tub with effect lighting according to claim 2, wherein after the light emitting diode is energized and emitted, the bubble ejection amount of the bubble ejection nozzle is decreased and the small bubble is controlled to rise.

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