JPH04279163A - Bubble water flow generator - Google Patents

Abstract

PURPOSE:To facilitate the vanishing of bubbles after the generation of fine bubbles. CONSTITUTION:A fast jet flow is s}uted to a water tank 7 from a jetting nozzle 10. Air is supplied from a samll-diameter pipe 11. A surfactant 16 and a defoaming agent 20 are supplied to a circulation circuit 9 which circulates water of the water tank 7. When the surfactant 16 is supplied, bubbles generated within the water tank 7 reduce in the surface tension and divided by the fast jet flow to be turned to finer bubbles. The supply of the defoaming agent 20 makes molecular films of the bubbles easy to break, thereby vanishing the bubbles.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubbly water generating device for spouting a bubbly water stream into an aquarium.

0002

2. Description of the Related Art A conventional bubbly water flow generating device of this type, as shown in FIG.
A mixing chamber 3 was provided downstream of the circulation pump 2, and its tip was configured to open into the water tank 1. The mixing chamber 3 consisted of an ejection nozzle 4 and a mixing nozzle 5 having horizontal axes, and a mixed air suction part 6 whose axis was perpendicular to the two nozzle axes (for example, 1
Publication No. 88027).

0003

However, in the above structure, the air bubbles are relatively large because the intake air is sucked in from around the jet water due to the jet action of the water flow. This is because the air mass initially comes into contact with the water flow in the laminar diffusion layer around the jet water where the flow velocity is slow, so the air mass is reduced in size by the laminar flow shearing force here. However, since the contact area between water and air is small,
There is a problem in that large amounts of energy are not transferred and there is a limit to the ability to make bubbles smaller.

Next, the air parcel is transferred from the laminar boundary layer to the turbulent region, where it is atomized by turbulent shear force due to momentum exchange with water particles, but once formed, the air parcel is destroyed. This requires a very large amount of energy, and therefore there is a limit to the ability to make bubbles fine even in this turbulent flow region.

On the other hand, as a chemical method for generating fine bubbles, there is a method using a surfactant. The surfactant has the property of reducing the surface tension of the bubbles and making the bubbles more likely to be destroyed by the dynamic pressure energy of the jet stream. Therefore, by using a surfactant, it is possible to generate even smaller bubbles. However, once a surfactant is used, the surface tension decreases, making it easier to generate small bubbles, but there is a problem in that the bubbles do not disappear easily.

[0006] The present invention has been made to solve these conventional problems, and it is an object of the present invention to provide a bubble water flow device capable of extinguishing fine bubbles even after they have been generated.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the bubble water flow generating device of the present invention includes a water tank, a circulation circuit for circulating water in the water tank, and a circulation pump provided in the circulation circuit. , an air supply means having an air supply port for supplying air to the circulation circuit, and an ejection nozzle connected to the discharge side of the circulation pump and ejecting a stream of bubble water into the water tank;
The water tank or circulation circuit is provided with a surfactant supplying means for supplying a surfactant and an antifoaming agent supplying means for supplying an antifoaming agent.

[0008]

[Function] According to the above-described structure, when a surfactant is supplied to an aquarium or a circulation circuit for circulating water in an aquarium, the surface tension of the air bubbles generated at the tip of the air supply means is lowered, and the surface tension of the air bubbles is lowered. The jets ejected from the air collide with each other, and the dynamic pressure energy of the jets shears air masses to generate fine bubbles. Furthermore, the bubble diameter and the amount of bubbles can be changed by controlling the amount of surfactant supplied. Furthermore, when an antifoaming agent is supplied to the water tank or the circulation circuit, the molecular membrane of the bubbles is easily destroyed and the bubbles disappear.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 7 is a water tank, and a circulation circuit 9 having a circulation pump 8 is connected to this water tank 7. A jet nozzle 10 is provided on the discharge side of the circulation pump 8, and a circulating flow is supplied to the water tank 7 via the jet nozzle 10. On the other hand, on the downstream side of the jet nozzle 10, a small diameter pipe 11 serving as an air supply port is provided so as to open into the water tank 7. An air pump 12 and a valve 13 are provided on the upstream side of the small diameter pipe 11. The circulation circuit 9 also includes a pipe line 14 serving as a surfactant supply means, a container 15 for storing the surfactant 16, and a valve 17 for controlling the flow rate of the surfactant.
is provided. Further, the circulation circuit 9 is provided with a pipe line 18 serving as an antifoaming agent supply means, a container 19 for storing an antifoaming agent 20, and a valve 21 for controlling the flow rate of the antifoaming agent.

In the above configuration, when the circulation pump 8 is operated, the water sucked from the water tank 7 through the circulation circuit 9 is turned into a high-speed jet by the jet nozzle 10 having a reduced cross-sectional area and is ejected into the water tank 7. At the same time, the air pump 12 is operated to supply air into the water tank 7 from the small diameter pipe 11. The air mass thus supplied is collided with a jet stream ejected from the jet nozzle 10, and is sheared by the dynamic pressure energy of this jet stream, and changes into minute bubbles. Now, when the valve 17 is opened and the surfactant 16 is sent into the circulation circuit 9, the surface tension of the water in the water tank 7 is reduced and the bubble diameter is reduced. The higher the concentration of the surfactant, the lower the surface tension, and the smaller the diameter of the bubbles that are generated, turning into fine bubbles. When the bubble diameter becomes smaller than about 50 μm, the water becomes cloudy, but this cloudiness can be changed by adjusting the concentration of the surfactant. The amount of air bubbles can also be changed by adjusting the amount of air from the air pump 12, and the degree of cloudiness can also be adjusted by this.

Next, when the valve 21 is opened and the antifoaming agent 20 is fed into the circulation circuit 9 little by little, the diameter of the bubbles generated in the water tank 7 changes, and the bubbles are destroyed and disappear. This is because the surfactant reduces the surface tension and tends to generate small bubbles, but adding an antifoaming agent destroys the molecular membrane of the bubbles.

[0013] Since the flow rates of the surfactant 16 and antifoaming agent 20 can be freely controlled by the respective valves 17 and 21, the fine bubbles generated by adding the surfactant 16 are no longer necessary. If this occurs, it can be immediately extinguished by adding the antifoaming agent 20.

[0014]

[Effects of the Invention] As described above, according to the bubble water flow generating device of the present invention, the following effects can be obtained.

[0015] By supplying a surfactant to an aquarium or a circulation circuit for circulating water in the aquarium using a surfactant supplying means, the bubble diameter can be changed and fine bubbles can be generated. That is, the surfactant lowers the surface tension of the bubble mass, and the bubbles are collided with a jet jet ejected from a jet nozzle, and can be easily converted into fine bubbles by the dynamic pressure energy of the jet jet. Further, when these fine bubbles are no longer needed, the defoaming agent can be supplied by the defoaming agent supplying means to extinguish the bubbles.

That is, by controlling the amounts of surfactant and antifoaming agent used, the diameter of the bubbles can be freely changed, and the bubbles once generated can be extinguished. If applied to a bubble jet bath, you can enjoy the process of bubble generation and disappearance, making your bathing experience even more comfortable.

[Brief explanation of the drawing]

[Fig. 1] Partial cross-sectional configuration diagram of a bubble water flow generating device in an embodiment of the present invention.

[Figure 2] Cross-sectional view of a conventional bubble water flow generator

[Explanation of symbols]

7 Aquarium 8 Circulation pump 9 Circulation circuit 10 Spout nozzle 11 Small diameter pipe 12 Air pump 16 Surfactant 20 Antifoaming agent

Claims (1)

[Claims] 1. Air supply means having an aquarium, a circulation circuit connected to the aquarium for circulating water in the aquarium, a circulation pump provided in the circulation circuit, and an air supply port for supplying air to the circulation circuit. a jetting nozzle connected to the discharge side of the circulation pump and spouting a stream of bubble water into the water tank; a surfactant supply means for supplying a surfactant to the water tank or the circulation circuit; and an antifoaming means for supplying an antifoaming agent. and a bubble water flow generating device, respectively.