JP2904712B2 - Bubble generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble generator for spraying a mixed fluid of water and air into water in a bathtub, and more particularly to an orifice provided in the bubble generator for spraying water at a high speed, for example. Related to the structure.

[0002]

2. Description of the Related Art Conventional bubble generating devices as described above include:
For example, Japanese Patent Application Laid-Open No. 64-64611 and Japanese Patent Application Laid-Open
There is a technique described in Japanese Patent No. 21050, for example. One example of such a conventional technique is shown in FIG. This figure shows a bubble generator 3 provided in a bathtub 1. Utilizing the negative pressure generated when water is injected from the orifice 5 at high speed, air 9 is mixed into the inside of the jet water 7 from around the jet water 7. In this way, a mixed jet fluid 11 containing bubbles is created,
This mixed jet fluid 11 is jetted into water.

[0003]

However, according to the prior art, in order to mix a sufficient amount of gas (for example, air 9) for the purpose of obtaining a sufficient massage effect, a liquid to be injected (for example, water) is required. 7) The amount or the injection speed had to be increased. For this reason, noise due to the liquid to be ejected, particularly random noise having no noticeable peak, is likely to occur. When the bubble generating device 3 is provided in the bathtub 1, the noise impairs comfort during bathing. In particular, the recognizability of audio and sound from televisions and the like has deteriorated.

Further, in order to increase the amount of the liquid to be injected, a large circulation pump is required, for example, and at the same time, a large amount of electricity is consumed for operating the large circulation pump, resulting in a large energy loss.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a bubble generating apparatus which can mix a sufficient amount of gas without increasing the amount of liquid to be injected. With the goal.

In order to achieve the above object, the bubble generating apparatus of the present invention utilizes a negative pressure generated when a liquid is ejected at a high speed from an opening of an orifice , and uses the inside of the ejected liquid.
In the bubble generating device for ejecting a mixed fluid jet by feedthrough gas from the periphery of said orifice, said orifice, and wherein <br/> to have 4 to 6 of the aperture for injecting liquids I do.

[0007] In the present invention, four to four provided in the orifice
The six apertures, the cross-sectional shape of the injection fluid in order Do to that divided into 4 to 6 pieces of <br/> plurality of cross sections, the orifice
The contact area between the gas mixed from the surroundings and the jet liquid increases , thereby increasing the amount of mixed gas.
Can be.

[0008]

1 and 2 show one embodiment of the present invention.
The bubble generator 3 of this embodiment is provided on the wall 13 of the bathtub 1. That is, the outlet joint 17 from the inside and the housing 19 from the outside with respect to the hole 15 formed in the wall 13.
Are attached via a packing 21 and fitted by screws 23.

A high-pressure water passage 27 through which high-pressure water 25 is guided is formed behind the apparatus housing 19. An orifice 29 for injecting the water 25 at high speed is provided substantially horizontally at the end of the high-pressure water channel 27. The orifice 29 is formed by combining five openings 31 as shown in FIG. That is, 4 around the central opening 31A.
The openings 31B are formed at equal intervals. The shape of each opening 31 is circular, and the axes of each opening 31 are parallel to each other.

Around the tip of the orifice 29, water 25
And the air 35 are mixed to form a mixing chamber 33. An air passage 37 for guiding the air 35 is connected to the mixing chamber 33. In front of the tip of the orifice 29, water 25 and air 3
Nozzle 4 for guiding a mixed jet fluid 39 mixed with
1 is provided. The rear end of the nozzle 41 is a spherical portion 43. The rear of the spherical portion 43 is supported by a fixed ring-shaped support member 45, and the front of the spherical portion 43 is supported by a cylindrical support member 47 that can move in the axial direction. The cylindrical support member 47 is urged by a spring 49, presses the nozzle 41 against the ring-shaped support member 45, and supports the nozzle 41 so that the rotation posture of the nozzle 41 can be changed.

The operation of this embodiment will be described below. The high-pressure water 25 is guided to a high-pressure water channel 27 and is supplied to an orifice 29.
It is injected at high speed. The air 35 is taken in from the air passage 37 by the negative pressure generated at the time of this injection. And
In the mixing chamber 33, air 35
Is mixed into the jet water 36 to form a mixed jet fluid 39. At this time, the cross-sectional shape of the jet water 36 is divided into five cross sections by the five openings 31 of the orifice 29. Therefore, the contact area where the jet water 36 comes into contact with the surrounding air increases. Therefore, the amount of air mixed in from the contact surface increases.

The mixed jet fluid 39 is guided to a nozzle 41. Since the nozzle 41 is supported by the spherical portion 43, the rotation posture can be changed by moving the tip of the nozzle 41 with a finger.

The mixed jet fluid 39 injected from the nozzle 41 and containing a large amount of air 35 exerts a greater masurge action on the human body in the bathtub 1. Next, the effect of an orifice having a plurality of openings will be described by a comparative experiment using the apparatus of this embodiment.

[0014]

[Table 1]

In this experiment, four orifices were prepared. One orifice serving as a reference has one circular opening. The diameter is 6 mm, the cross-sectional area S of the opening is 28, 27 mm2, and the outer peripheral length L is 18, 85 mm. The other three orifices are 4, 5, 6 respectively
Has a combined opening. The shape of each of these three orifices is in accordance with (A), (B), and (C) in FIG. (The upper part of Table 1 has an error of about 2%). Also,
The respective outer peripheral lengths L were as shown in the middle row of Table 1.

These four orifices have a circulating flow rate of 2 per minute.
0 liters of water were guided and sprayed. As a result, the amount of air mixed into the injection water, that is, the bubble flow rate Q was as shown in the lower part of Table 1. That is, the bubble flow rate Q of the three orifices each having a plurality of openings is larger than the bubble flow rate Q of the orifice serving as the comparison reference. In particular, the bubble flow rate Q of the orifice having four openings is the largest.

The results shown in Table 1 are because the orifice has a plurality of openings, so that the area of contact with the air 35 around the water 25 is increased, and the amount of air mixed in can be increased. Can be explained.

Even if the number of openings increases to five or six,
It is considered that the reason why the bubble flow rate Q does not increase so much is that the injection water 36 divided into a plurality of cross-sectional shapes tends to be combined into one cross-section. In other words, it is desirable that the dimensions between the individual openings are separated to some extent so that the coupling does not proceed much. However, if the size between the individual openings is increased, the cross-sectional area S must be the same for comparison, and the outer diameter of the entire orifice becomes large. Therefore, the outer diameter of the injection water 36 having a plurality of cross sections also increases. When the outer diameter of the jet water 36 increases, the outer diameter of the mixed jet fluid 39 in which the jet water 36 and the air 35 are mixed also increases, the fluid resistance with the nozzle 41 that guides the mixed jet fluid 39 increases, and circulation occurs. This is disadvantageous because the load on the pump increases. Further, when the outer diameter of the entire orifice becomes large, the orifice is likely to be restricted by the space inside the apparatus. Therefore, the number of openings is preferably larger or smaller.

In the above embodiment, the orifice 29
Has a circular shape (FIGS. 2 and 3B), and the opening 31 of the orifice used in the experiment also has a circular shape (FIGS. 3A and 3C). However, the shape of the opening 31 is not limited to a circular shape, and may be a non-circular shape as shown in FIG. Further, as shown in FIG. 3E, the central opening 31A may be circular and the surrounding plural openings 31B may be non-circular. Furthermore, the axes of the openings 31 may be non-parallel.

As described above, according to this embodiment, the plurality of openings 31 of the orifice 29 allows the injection water 36
Is divided into a plurality of cross sections, and the contact area of the surroundings of the jet water 36 with the air 35 is increased, so that the amount of the air 35 mixed into the fixed amount of the jet water 36 can be increased. Therefore, the impact force on the human body can be increased, and the massage effect can be increased.

In other words, in order to mix a sufficient amount of air 35, it is not necessary to increase the amount of water 25 injected at a high speed or the injection speed as in the prior art. For this reason,
Noise due to the jet water 36 is less likely to be generated.
That is, the vibration noise of the wall 13 of the bathtub 1 due to the pressure fluctuation induced when the air 35 is mixed into the jet water 36 and the random noise generated when the mixed jet fluid 39 is jetted into the bathtub 1 are reduced. Can be

Further, for example, a large circulation pump for increasing the amount of liquid to be ejected or the ejection speed is not required, and a small circulation pump is sufficient. At the same time, the power consumption for operating the circulation pump is small, and the energy loss can be reduced.

[0023]

As described above, according to the present invention, since the orifice has a plurality of openings, the contact area with the gas around the jetted liquid is increased, so that the amount of gas to be mixed can be increased. In other words, it is not necessary to increase the amount or the ejection speed of the liquid ejected at a high speed in order to mix a sufficient amount of gas as in the related art. Therefore, noise due to the liquid to be ejected is less likely to be generated. Further, for example, a large-sized circulation pump for increasing the amount of the liquid to be injected is not required, and at the same time, the power consumption for operating the pump can be reduced, and the energy loss can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing the orifice of FIG. 1;

FIG. 3 is a front view of a tip of a plurality of orifices according to another embodiment, (A) is a front view of a tip of an orifice having four circular openings, and (B) is a front view of five orifices. (C) is a front view of an orifice having six circular openings, (D) is a front view of an orifice having four non-circular openings, and (E) is a front view of four orifices. FIG. 4 is a front elevational view of an orifice having a non-circular opening and one circular opening.

FIG. 4 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

1 ... bathtub, 3 ... bubble generator, 5 ... orifice,
7 ... injection water, 9 ... air, 11 ... mixed injection fluid, 1
3 ... wall, 15 ... hole, 17 ... outlet joint, 19 ...
Device housing, 21 packing, 23 screws, 2
5 ... water, 27 ... high-pressure headrace, 29 ... orifice,
31 ... opening, 33 ... mixing chamber, 35 ... air, 37 ...
... air passage, 39 ... mixed jet fluid, 41 ... nozzle, 4
3 spherical part, 45, 47 support member, 49 spring

Claims (3)

(57) [Claims] A negative pressure generated when a liquid is jetted at a high speed from an opening of an orifice is used to form a liquid inside the jetted liquid.
In the bubble generating device for ejecting a mixed fluid jet by feedthrough gas from the periphery of said orifice, said orifice
It is bubble generating device comprising a this <br/> having 4 to 6 of the aperture for injecting liquids. (2) The orifice has four openings at equal intervals
The bubble generation device according to claim 1, wherein the bubble generation device has
Place. (3) The orifice has four openings around the central opening.
Claims characterized by having at least five openings at equal intervals
Item 2. The bubble generator according to Item 1.