JPH04347155A - Bubble water flow generator - Google Patents

Abstract

PURPOSE:To generate even fine bubbles in a water tank utilizing a dynamical pressure energy of a jet flow jetted once into the water tank. CONSTITUTION:Water sucked with a circulation pump 8 turns to a fast jet flow with a water jetting nozzle 10 and passes at a high speed through a passage 13 provided with an air jetting nozzle 17. At the same time, air being fed from an air pump 21 is supplied toward the jet flow from an air jetting port 15. The air supplied is divided by dynamical pressure energy of the jet flow running faster in the passage 13 to make a fine air mass. The fine air mass is mixed into the jet flow in the passage 13 to be diffused into a water tank.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble water flow generating device for ejecting bubbles into an aquarium.

0002

[Prior Art] Conventionally, this type of bubble water flow generating device is shown in Fig. 3.
As shown in Figure 2, water from a water tank 1 is sucked in by a circulation pump 2, and a mixing chamber 3 provided downstream of the circulation pump 2 is connected to the water tank 1.
It was configured to open to the And the mixing chamber 3 is
It consisted of an ejection nozzle 4 and a mixing nozzle 5 having horizontal axes, and a mixing air suction part 6 whose axis was perpendicular to the two nozzle axes (for example, Utility Model Application No. 63-18802).
Publication No. 7).

0003

However, in the above-mentioned configuration, since the intake air is sucked in from around the jet water by the jet action of the water stream, only relatively large bubbles are generated. because,
Since the air parcel initially comes into contact with the water flow in the laminar diffusion layer around the jet water where the flow velocity is slow, the air parcel is reduced in size by the laminar flow shearing force here. However, because the contact area between water and air is small, large amounts of energy cannot be transferred and there is a limit to miniaturization.

Next, the air parcel is transferred from the laminar boundary layer to the turbulent region, where it is miniaturized by turbulent shear force due to momentum exchange with water particles, but it is extremely difficult to break up the air parcel once formed. There was a limit to miniaturization because it required a large amount of energy. Furthermore, the diameter of the microbubbles has not been made constant.

[0005] The present invention is intended to solve the problems of the prior art, and aims to provide a bubble water flow generating device that generates minute and uniform bubbles.

[0006]

[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. , a water jet nozzle having one end connected to the discharge side of the circulation pump and the other end connected to the water tank; and a jet flow separated from the water jet nozzle and provided inside the water tank and jetted from the water jet nozzle. an air jet nozzle having a cylindrical flow path through which air passes, and an air jet nozzle that jets the air toward the jet flow is bored in the inner peripheral surface of the cylindrical flow path of the air jet nozzle. It is.

[0007]

[Operation] According to the present invention, air is supplied from the air outlet of the air injection nozzle to the jet stream ejected from the water injection nozzle. This air is then divided by the dynamic pressure energy of the jet and becomes minute bubbles. The microbubbles are then diffused into the aquarium through the flow path of the air jet nozzle. Since the jet stream containing bubbles flows through the flow path, no sudden changes in dynamic pressure energy occur, so that uniform microbubbles are generated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 7 is a water tank, and a circulation circuit 9 having a circulation pump 8 is connected to this water tank 7. A water jet nozzle 10 whose tip is connected to the water tank 7 and a water flow adjustment valve 11 are disposed on the discharge side of the circulation pump 8. 12 is an arrow indicating a jet of water from the water jet nozzle 10. On the other hand, on the downstream side of the water jet nozzle 10,
A flow path 13 through which the jet jet discharged from the water jet nozzle 10 passes, an air chamber 14 into which the supplied air first flows, and an air chamber 14 that is connected to the air chamber 14 and is approximately orthogonal to the flow direction of the jet flow. An air jet nozzle 17 is provided, which includes a passage inner surface 16 having a plurality of air jet ports 15 bored so that air is supplied from the outer periphery toward the center. This air jet nozzle 17 is arranged so as to open into the water tank 7. Note that 18 is an arrow indicating the flow of jet air flowing inside the air chamber 14, and 19 is an ejected bubble water stream (bubbles). Further, an air pump 21 is connected to the air jet nozzle 17 via an air amount adjustment valve 20.

In the above configuration, when the circulation pump 8 is operated, water sucked from the water tank 7 through the circulation circuit 9 becomes a high-speed water stream at the water jet nozzle 10 whose cross-sectional area is reduced. Furthermore, this high-speed water flow passes through the flow path 13 of the air jet nozzle 17 and is ejected into the water tank 7, but since the flow path 13 is tubular, the flow of the water flow is controlled, and the flow path is in the state of high-speed water flow. Pass 13. At the same time, the air pump 21 is operated to supply air from the air outlet 15 to the water tank 7. The air mass thus supplied is divided by the dynamic pressure energy of the water flow flowing through the flow path 13 and the dynamic pressure energy of the water flow flowing along the inner surface 16 of the flow path, becomes microbubbles, and is sent to the water tank 7. Further, by adjusting the amount of air from the air pump 21 with the air adjustment valve 20, the amount of bubbles can be changed and the diameter of the generated bubbles can be adjusted. Note that by providing the air chamber 14 on the upstream side of the air jet ports 15, the pressure of all the air jet ports 15 becomes constant, and air can be jetted from all the air jet ports.

0010

[Effects of the Invention] As is clear from the above description, the following effects can be obtained by the bubble water flow generating device of the present invention.

[0011] An air jet nozzle is provided downstream of the water jet nozzle, and this air jet nozzle has a flow path through which the water flow from the water jet nozzle passes, and an air jet port is provided inside this flow path. This allows bubbles to form. In other words, the air mass is divided by the dynamic pressure energy of the jet jet ejected from the water jet nozzle, and as the jet flow and bubble jet flow through the flow path of the air jet nozzle, this flow is rectified, and the energy of the water flow is It is converted into a force that efficiently shears air and can generate many uniform small-diameter air bubbles.

[Brief explanation of the drawing]

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

[Figure 2] Cross-sectional view of the air jet nozzle and water jet nozzle of the device

[Figure 3] Cross-sectional view of a conventional bubble water flow generator

[Explanation of symbols]

7 Aquarium 8 Circulation pump 9 Circulation circuit 10 Water jet nozzle 14 Air outlet 16 Flow path 17 Air jet nozzle

Claims (1)

[Claims] Claim 1: A water tank, a circulation circuit for circulating water in the water tank, a circulation pump provided in the circulation circuit, one end of which is connected to the discharge side of the circulation pump, and the other end of which is connected to the water tank. a water jet nozzle; and an air jet nozzle that is separated from the water jet nozzle, is provided inside the water tank, and has a cylindrical flow path through which a jet flow jetted from the water jet nozzle passes; The bubbly water flow generating device includes an air jet port for jetting air toward the jet flow on the inner circumferential surface of the cylindrical flow path of the nozzle.