JPH08224283A - Bubble nozzle - Google Patents

Abstract

PURPOSE: To expand the intensity and area of sound which becomes the yardstick of a massage effect in a bathtub by forming a bubble nozzle by providing an entry passage part, a center passage part and an exit passage part with different diameters advancing the flowing direction of liquid and permitting a large amount of air to flow in from an air supply tube. CONSTITUTION: A water tube 4 is mounted on the entry passage part 10 of a bubble nozzle main body 1 mounted on the bathtub, to which bathing water pressurized with a pump, etc., is sent by compression. The passage of the entry passage part 10 is formed in conical cylindrical shape of reduced diameter advancing the flowing direction of the bathing water, etc., and communicates with the center passage part 11 of wide diameter at the tip. The bathing water, etc., increasing flow velocity in the entry passage part 10 generates negative pressure in the passage by increasing its volume in the center passage part 11. The air from the air supply tube 6 protruding by intersecting orthogonally to the axial direction of the passage is mixed by absorbing in the bathing water, etc., and such bathing water is diffused in the exit passage part 12 of small diameter, then, it is discharged to the bathtub as a bubble jet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble nozzle applicable to the generation of bubble jets, the mixing of liquids, the stirring operation and the like.

[0002]

2. Description of the Related Art Conventionally, various nozzles have been known as bubble nozzles that can be applied to the generation of bubble jets, the mixing of liquids, the stirring operation, and the like. For example, as a bubble nozzle for spraying bath water into the bath, a diffuser 7 as shown in FIG. 2 projects into an air chamber 9 and has a cylindrical discharge port 8, which are screw-fitted to the bubble nozzle body 1. And water pipe 4 at the entrance
A bubble nozzle in which an air tube 5 is connected to the bubble nozzle body 1 above the diffuser 7 is known. The bubble nozzle main body 1 is attached to the bathtub wall surface 3 by a mounting member 2. In the nozzle of FIG. 2, bathtub water is taken in from the water pipe 4, and jetted from the diffuser 7 into the air chamber 9 to mix air, and jet a bubble jet into the bathtub from the discharge port 8. In addition, the diffuser 7 as shown in FIG.
There is known a bubble nozzle in which an air bubble projects into the air chamber 9.

However, the conventional bubble nozzle is shown in FIG.
According to the experiment using the nozzle shown in, the sound intensity and area (frequency width) that are the indicators of the massage effect in the bathtub are insufficient due to insufficient bubble generation and diffusion, and the nozzle outlet is However, if the body is closed, circulating water will flow back into the air pipe, and the pressure loss of the nozzle will be large. Although it is not sufficiently clear which of these difficulties is caused, in the conventional nozzle, the diffuser 7 projects into the air chamber 9, and the air directly flows from the air pipe 5 connected to the bubble nozzle body 1 to the air chamber 9. I suspect that it is because of the structure that enters.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bubble nozzle which can solve the problems of the prior art, has a simple structure and is easy to manufacture.

[0005]

According to the present invention, in a bubble nozzle having a liquid flow passage in the central axial direction, the bubble nozzle has an inlet flow passage portion, a central flow passage portion, and The outlet flow passage portion is communicated in order, the inlet flow passage portion is a conical cylinder whose liquid flow passage has a reduced diameter toward the flow direction of the liquid, and the central flow passage portion is the liquid flow passage. The diameter of the air supply pipe is wider than the diameter of the front end of the reduced diameter, and the air supply pipe projects into the flow passage in a direction orthogonal to the axial direction of the flow passage of the wide diameter, and the end of the air supply pipe is located downstream of the center of the flow passage. The present invention relates to a bubble nozzle, wherein the liquid flow passage is a right circular cylinder having a smaller diameter than the central flow passage portion.

According to the present invention, in a bubble nozzle having a bath water channel provided in the central axial direction, the bubble nozzle has an inlet channel portion, a central channel portion and an outlet channel portion in the flow direction of the bath water. The inlet flow passage portion has a conical tubular shape with a reduced diameter of a conical angle of 6 to 15 in the inlet flow passage portion, and the central flow passage portion has a bath water flow passage. The diameter of the passage is wider than the diameter of the tip of the reduced diameter, and the diameter ratio of the diameter of the tip of the inlet flow path portion and the diameter of the center flow path portion (tip diameter / central flow path diameter) is 0.3 to 0.5. And the air supply pipe projects into the flow passage in a direction orthogonal to the axial direction of the flow passage having a wide diameter,
The end of the air supply pipe is opened downstream at the center of the flow passage, and the outlet flow passage is a straight cylinder having a smaller diameter than that of the central flow passage and the outlet flow passage and the center. The present invention relates to a bubble nozzle, wherein the diameter ratio of the flow passage portion (outlet flow passage portion / central flow passage portion) is 0.5 to 0.7.

[0007]

In the bubble nozzle of the present invention, the volume of the liquid increases in the central flow passage, and a negative pressure is generated in the flow passage to generate an ejector effect, so that a large amount of air easily flows in from the air supply pipe. . Further, the air inflow position is orthogonal to the axial direction of the flow passage of the central flow passage portion having a wide diameter, the air supply pipe projects into the flow passage, and the end portion of the air supply pipe is located downstream of the center of the flow passage. Since it is opened, the generated bubbles are sufficiently diffused in the liquid such as bath water to form a bubble jet with a high sound pressure and a wide area.
Further, when the structure of the bubble nozzle of the present invention is adopted, for example, even if the discharge port of the nozzle is touched by a hand or body in the bathtub and the discharge port is blocked, the air supply pipe is thin, so that the circulating water is circulated in the air pipe. There is no backflow and the pressure loss of the nozzle is small. The bubble nozzle of the present invention is particularly suitable for a bubble bath having a high massage effect, but is not limited to the bath and can be widely applied to the generation of bubble jets, the mixing of liquids, the stirring operation, and the like.

[0008]

The present invention will be described below with reference to the drawings. FIG.
FIG. 4 is a cross-sectional view showing an air bubble nozzle attached to a bath according to an embodiment of the present invention. The bubble nozzle main body 1 is fitted into the bathtub wall surface 3, and is screwed and fixed to the bathtub wall surface 3 by the screw portion of the bubble nozzle main body 1 and the screw portion of the mounting member 2 from the inner surface side of the bathtub. A water pipe 4 is attached to the inlet flow path portion 10 of the bubble nozzle body 1, and a liquid such as bath water pressurized by a pump (not shown) is pumped to the bubble nozzle body 1.
The inlet flow passage portion 10 has a conical cylindrical shape whose diameter is reduced in the flow direction of a liquid such as bath water. It is suitable that the conical angle of the conical cylinder having a reduced diameter is 6 to 15 °. By reducing the diameter, the liquid such as bath water is compressed to increase the flow velocity.

The inlet channel portion 10 communicates at its tip with a central channel portion 11 having a diameter larger than that of the tip, and liquid such as bath water whose flow velocity is increased in the inlet channel portion 10 flows through the central channel portion. Part 1
When 1, the volume is increased and a negative pressure is generated in the flow path to exert the ejector effect. The diameter of the tip of the inlet channel 10 is usually 1
It is designed within the range of 0 to 20 mm. It is preferable that the tip diameter of the inlet channel portion 10 and the diameter of the central channel portion 11 have a diameter ratio (tip diameter / central channel portion diameter) of 0.3 to 0.5.

An air supply pipe 6 is inserted into the central flow passage portion 11 so as to project perpendicularly to the axial direction of the flow passage, and the end portion of the air supply pipe 6 is located downstream of the center of the flow passage. The side is cut and opened at an angle of 30 to 50 °, preferably about 45 °. The air supply pipe 6 is the bubble nozzle body 1
The core is aligned with the air tube 5 joined to the. Due to the ejector effect in the central flow path portion 11, air is sucked and mixed into the liquid such as bath water in the flow path from the air supply pipe 6, diffused in the outlet flow path portion 12 and becomes a bubble jet flow from the outlet flow path portion 12. It is discharged into the bath. The outlet channel 12 has a liquid channel such as bath water in the shape of a right cylinder having a smaller diameter than the central channel 11. The ratio of the diameter of the outlet channel portion 12 to the diameter of the central channel portion 11 (outlet channel portion 12 / central channel portion 11) is 0.5 to 0.
A range of 7 is preferred.

Next, a bubble nozzle according to the present invention similar to that shown in FIG. 1 (the tip diameter of the inlet flow passage portion is 10 mm, the cone angle is 7 °, the diameter ratio of the tip diameter of the inlet flow passage portion to the diameter of the central flow passage portion is 0.4, The ratio of the diameter of the outlet channel to the central channel is 0.6), and the conventional bubble nozzle similar to that shown in FIG.
As a result of measuring the pressure loss at 5 liters / minute, it was 0.1 kg / cm ² in the bubble nozzle according to the present invention, while it was 2.0 kg / cm ² in the conventional bubble nozzle. Further, in the bubble nozzle according to the present invention, even if the discharge port of the nozzle was closed by hand for 30 seconds, the circulating water did not flow back to the air tube, but in the conventional bubble nozzle, backflow was recognized.

Further, in order to confirm that the bubble jet from the bubble nozzle of the present invention has a massage effect on the human body in the bath, the intensity of the sound emitted by the bubble jet in the bath was measured. FIG. 4 is a schematic diagram of underwater sound measurement for measuring the above-mentioned sound intensity. The bubble nozzle of the present invention and the conventional bubble nozzle shown in FIG. 3 were separately operated in a bath having a length of 2000 mm, a width of 2000 mm, and a water depth of 630 mm at a bath temperature of 36 ° C. at a flow rate of 30 liter / mm.

FIG. 5 shows an underwater sound frequency analysis result displaying the sound intensity measured from the bubble nozzle of the present invention. Figure 6
Figure 3 shows the results of underwater sound frequency analysis displaying the sound intensity measured from a conventional bubble nozzle. Zero Hz from Figures 5 and 6
It was found that the bubble nozzle of the present invention produced a stronger sound than the conventional bubble nozzle over a wide range of high-frequency sound ranging from a low frequency sound close to 100 KHz. It can be confirmed that the jet has a high massage effect on the human body.

[0014]

The bubble nozzle of the present invention has a wide range of sound intensity and range (frequency width) which is a measure of the massage effect in the bathtub, and even if the discharge port of the nozzle is clogged by a hand or body. Circulating water does not flow back into the air tube, and the pressure loss at the nozzle is small. In addition, the simple structure makes it easy to manufacture and maintain.

[Brief description of drawings]

FIG. 1 is a sectional view of a bubble nozzle showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional bubble nozzle.

FIG. 3 is a sectional view of a conventional bubble nozzle.

FIG. 4 is a schematic diagram of underwater sound measurement.

FIG. 5 is a diagram of underwater sound and frequency measurement with the bubble nozzle of the present invention.

FIG. 6 is a diagram of underwater sound and frequency measurement using a conventional bubble nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air bubble nozzle main body 2 Mounting metal fittings 3 Bath wall surface 4 Water pipe 5 Air pipe 6 Air supply pipe 7 Diffuser 8 Discharge port 9 Air chamber 10 Inlet channel part 11 Central channel part 12 Outlet channel part

Claims (2)

[Claims] 1. A bubble nozzle provided with a liquid flow passage in the central axial direction, wherein the bubble nozzle communicates with an inlet flow passage portion, a central flow passage portion, and an outlet flow passage portion in this order in the liquid flow direction. The inlet flow path portion has a conical cylinder shape with a liquid flow path having a reduced diameter in the liquid flow direction, and the central flow path portion has a liquid flow path having a diameter larger than the reduced diameter tip end diameter. The air supply pipe projects into the flow passage at right angles to the axial direction of the wide-diameter flow passage, and the end of the air supply pipe opens downstream at the center of the flow passage, and the outlet flow The bubble nozzle, wherein the passage has a liquid flow path in the form of a right cylinder having a smaller diameter than the central flow path. 2. A bubble nozzle having a bath water passage in the central axial direction, wherein the bubble nozzle communicates in the order of the inlet flow passage, the central flow passage and the outlet flow passage in the flow direction of the bath water. In the inlet flow passage, the bath water flow passage has a conical cylindrical shape with a conical angle of 6 to 15 ° in the direction of the flow of bath water, and the central flow passage portion has a bath water flow passage. The diameter is wider than the tip diameter of the reduced diameter, and the diameter ratio of the tip diameter of the inlet flow path portion and the diameter of the central flow path portion (tip diameter / central flow path diameter) is 0.3 to 0.5. , The air supply pipe projects into the flow passage at right angles to the axial direction of the wide-diameter flow passage, and the end of the air supply pipe opens downstream at the center of the flow passage, and the outlet flow passage In the portion, the bath water passage is a straight cylinder having a smaller diameter than the central passage portion, and the diameter ratio between the outlet passage portion and the central passage portion (outlet passage portion / central passage portion) is 0. Bubble nozzles, which is a 5 to 0.7.