CN204502827U - A kind of device for generation of nano bubble - Google Patents

Abstract

A device for generating nanobubbles, comprising a tubular housing and a longitudinal shaft coaxially installed in the tubular housing, a fluid inlet and a fluid outlet are respectively provided at two ends of the tubular housing; the longitudinal shaft has a first end, The main body and the second end, the first end and the second end are suitable for connecting with the two ends of the main body; the main body includes a cylinder and wings distributed along the outer peripheral surface of the cylinder at intervals convex head. When a fluid flow passes through a flow channel between two airfoil lobes, the fluid converges and experiences a Venturi effect because the velocity of the fluid flow increases as the fluid flow passes through the airfoil lobes. Repeated converging and diverging fluid flows through multiple flow channels create velocity and pressure fluctuations and accelerate the formation of eddies known as the Coanda effect. This results in cavitation from the whirling nanobubbles formed by the fluid flow passing through the multiple flow channels. The utility model has the characteristics of simple structure, low cost and convenient use.

Description

A device for generating nanobubbles

field of invention

The utility model relates to a device for generating nano-bubbles, which is mainly used for the activation of water in health care, agriculture, aquaculture, water treatment and medical industries.

Background technique

In recent years, microbubble and nanobubble (nanobubble) technologies have attracted widespread attention due to their wide application in many industries, such as healthcare, agriculture, aquaculture, water treatment, and medical industries. Microbubbles and nanobubbles are generally considered to be gas bubbles disposed in a fluid, such as water. While microbubbles can remain suspended in water for some time, nanobubbles have been proposed to remain suspended in water for relatively longer periods of time. Microbubbles are approximately less than 100 microns (10 −6 ) or 0.004 inches in diameter in size, while nanobubbles can be less than 1 micron in size. In the context of this application, microbubbles, micro-nanobubbles or nanobubbles may be referred to as ultrafine bubbles.

Due to the increased concentration of negative ions around the air-water interface of microbubbles or nanobubbles, microbubbles or nanobubbles are able to effectively attract dust, debris, impurities as well as bacteria. When the gas in these ultra-small bubbles dissolves in water and collapses, the bubbles disappear. During the bursting process, the ultra-small bubbles release oxygen ion radicals and generate thermal energy, which is effective in eliminating (neutralizing) dust, debris, impurities, and bacteria attracted by the bubbles, and thereby providing improvements to the end user or the surface of the object cleaning experience. These advantageous properties of ultra-small bubbles have been exploited in the consumer healthcare field where micro- or nanobubble hydrotherapy is gaining wider acceptance due to its benefits to human health and skin care. In addition, due to the size and suspension of the ultra-fine air bubbles in water, they are able to be absorbed by the pores of the skin upon contact, and the absorption of the ultra-fine air bubbles in the skin cleans the pores, increases the amount of oxygen in the skin, and improves blood flow cycle.

In the agricultural industry, the use of large amounts of water and harmful chemicals on plants to increase yield and productivity can be mitigated by using micro or nano bubble technology. The expanded suspension rate of the ultra-small air bubbles in the water allows to increase the amount of oxygen available to crops and plants, thereby increasing yield and productivity. Also, this property has been used advantageously in aquaculture to provide fish and plants with an increasing concentration of oxygen in the water.

There are some common methods that can be used to generate ultra-small bubbles. The main method of generating bubbles is pressurized dissolution in which the gas is forcibly dissolved into the liquid by a compressor, ultrasonic waves, or pulse waves by cutting the gas with turbulence in the gas and liquid mixture. For example, U.S. Patent No. 8,201,811 uses a pressure dissolution method to generate microbubbles in a hydrotherapy bathing system. Liquid is drawn from the reservoir by a high pressure pump through a suction fitting secured to the reservoir. The gas is drawn through the injection device using the Venturi principle. The extracted gas and liquid are mixed in a pressure vessel under positive pressure. A mixing nozzle located in the interior cavity of the pressure vessel will distribute the pressurized mixed liquid and dissolved gas into a microbubble jet that produces microbubbles. Spa bathing systems require complex pressurized elements and devices to generate microbubbles, resulting in high maintenance costs and frequent maintenance.

Contents of the invention

The utility model provides a device for generating nano-bubbles, which solves the problems in the prior art that require complex pressurizing elements and devices, resulting in high maintenance costs and frequent maintenance.

The technical scheme of the utility model is: a device for generating nano-bubbles, characterized in that it includes a tubular shell and a longitudinal axis coaxially installed in the tubular shell, and fluid inlets are respectively provided at both ends of the tubular shell and a fluid outlet; the longitudinal shaft has a first end, a body, and a second end, the first end and the second end being adapted to be connected to both ends of the body, the first end and the second end both have tapered guides; the body includes a cylinder and wing-shaped protrusions distributed along the outer peripheral surface of the cylinder at intervals, and the cross-sectional shape of the wing-shaped protrusions is two arc-shaped opposite Composed of a jujube stone shape, the line between the two tips of the jujube stone shape is inclined at an angle of 70-80 degrees to the axis of the cylinder; a plurality of the wing-shaped protrusions are evenly spaced along the circumference and axial direction of the cylinder outer periphery; The adjacent wing-shaped protrusions are staggered by the same angle.

The body is formed by coaxial connection of a plurality of disc-shaped components, and at least one round of the above-mentioned wing-shaped protrusion is provided on the outer peripheral surface of each disc-shaped component.

The disc member is provided with an axial through hole, and a connecting rod is inserted into the through holes of a plurality of disc members to connect with each other, and the two ends of the connecting rod are connected with the first end and the The second end connection described above.

One end of the adjacent disc-shaped member is assembled together by inserting the first matching portion and the second matching portion that cooperate with each other.

The first fitting part is an internally threaded blind hole provided at one end of the disc-shaped member, and the second fitting part is an axially protruding screw provided at the other end of the disc-shaped member, through The screw rod is screwed into the internally threaded blind hole to connect adjacent disc-shaped components to each other.

First and second ends of the longitudinal shaft are connected to the body by an interference fit.

The tubular housing includes a first connection member associated with the fluid inlet and a second connection member associated with the fluid outlet, the opposite end of the first connection member from the fluid inlet and the second connection member. The opposite end of the connection member to the fluid outlet is connected coaxially.

The end of the first connection member opposite to the fluid inlet is threadedly connected to the end of the second connection member opposite to the fluid outlet.

The tubular housing is a tubular fluid distribution fitting on various facilities.

The ends of the tubular housing taper in the direction towards the fluid inlet or fluid outlet and conform to the shape of the tapered guide of the longitudinal axis.

Both the fluid inlet and the fluid outlet of the tubular housing are externally threaded.

The utility model has the characteristics of simple structure, low cost and convenient use.

Description of drawings

Fig. 1 is the axial sectional schematic diagram of the general structure of an embodiment of the present utility model;

Fig. 2 is a schematic diagram of an exploded structure of Fig. 1;

Figure 3 is a perspective view of the main body in Figure 1;

Fig. 4 is the plan view of Fig. 3;

Fig. 5 is a schematic diagram of the curve of the number of cycles required for the fluid to flow through the utility model;

Fig. 6 is the perspective view of the exploded structure of the main body of the present utility model;

Fig. 7 is a side view of a disc-shaped member of the present invention;

Fig. 8 is a side view of two disc-shaped components assembled together in the utility model;

Fig. 9 is a plan view of a disc-shaped member of the present invention;

Fig. 10 is the device of the present invention in use.

Detailed ways

Referring to Fig. 1-Fig. 10, a kind of device embodiment that is used to produce nano-bubble of the present utility model, comprises tubular shell 20 and the longitudinal shaft 10 that is coaxially installed in this tubular shell 20, respectively at the two ends of this tubular shell 20 A fluid inlet 22 and a fluid outlet 24 are provided. The longitudinal axis has a first end 12, a body 16 and a second end 14, the first end 12 and the second end 14 are adapted to be connected to both ends of the body 16, the first Both end 12 and said second end 14 have a tapered guide. Described body 16 comprises cylinder and the wing-shaped protrusion 19 that is distributed on the peripheral surface of this cylinder along interval, the cross-sectional shape of this wing-shaped protrusion 19 is that two arcs form wing shape (date pit shape) relatively, and date pit The (inclined) angle between the line (wing chord line) 13 of the two tips of the shape and the axis A-A of the cylinder is 70-80 degrees; Shape convex head 19.

Figure 1 shows a cross-sectional view of another embodiment of the invention, in which a longitudinal axis 10 includes a tubular member 20 having an inlet 22 and an outlet 24 for fluid communication with a fluid distribution or plumbing fitting. The longitudinal axis is enclosed within the tubular member 20 to allow fluid flow through the inlet and outlet of the tubular member 20 . The tubular member 20 has a cross-sectional profile corresponding to that of the longitudinal axis. For ease of assembly and manufacture, the tubular member 20 comprises two separate connecting members, namely a first connecting member 21 associated with the inlet of the tubular member 20 and a second connecting member 23 associated with the outlet of the tubular member 20 . The first connection member 21 is adapted to be connected with the second connection member 23 in various ways. For example, as shown in FIG. 1 , the first connecting member 21 has a threaded end on the outer circumferential surface of the first connecting member at the opposite end of the inlet 22, and the threaded end can receive A threaded end on a circumferential surface. Obviously, the threaded end of the first connecting member 21 may be on the inner circumferential surface of the first connecting member 21 , and the threaded end of the second connecting member 23 may be on the outer circumferential surface of the second connecting member 23 . Those skilled in the art will appreciate that various other ways of coupling the first and second connection members are possible without departing from the scope of the present invention. At the proximal end of the inlet 22 of the first connecting member 21, the first connecting member 21 tapers diametrically towards the inlet such that the tapered end is complementary to the first end 12 of the longitudinal axis. The tapered proximal end of the first connecting member 21 adjacent to the inlet 22 makes the fluid flow at the inlet laminar towards the wing-shaped nose 19 of the body and reduces energy loss, likewise the proximal end of the outlet 24 of the second connecting member 23 At the end, the second connection member tapers in diameter towards the outlet 24 so that the fluid flow can be laminar from the second end 14 of the longitudinal axis towards the outlet 24 with less energy loss. FIG. 2 shows the first connecting member 21 and the second connecting member 23 in a disassembled state to reveal the longitudinal axis within the tubular member 20 . The outer diameter of the longitudinal axis includes the diameter of the cylindrical body and the length of the outwardly protruding wing-shaped nose. The outer diameter of the longitudinal axis is slightly smaller than the diameter of the inner circumference of the tubular member so that the longitudinal axis is in close proximity to the inner circumferential surface of the tubular member 20 . This keeps the fluid flow within the tubular member 20 in intimate contact with the airfoil noses.

Referring to FIG. 3 , the longitudinal shaft 10 includes: a body 16 and a first end 12 and a second end 14 respectively disposed at its two ends, the body 16 is cylindrical, the first end 12 and the second end Portion 14 includes a tapered guide whose diameter tapers away from the body. The tapered guide includes, but is not limited to, a frusto-conical shape. In one embodiment of the present invention, the tapered guide may be a raised cap. The purpose of the tapered guide is to laminarly flow the fluid flow from the fluid distribution fitting to and from the cylindrical body 16 and to reduce energy losses, details of which will be provided later. The first end portion 12 and the second end portion 14 may be adapted to connect with the ends of the longitudinal shaft. One way in which the first end 12 is connected to the longitudinal shaft may be through a mating portion on the first end 12 or the second end 14 configured to matingly connect with the end of the longitudinal shaft. The first end portion 12 may also include a threaded inner circumferential surface (not shown) for fastening to a threaded end (not shown) of a longitudinal shaft.

As previously mentioned, the longitudinal shaft 10 can be mounted within a variety of fittings for fluid distribution (as the tubular housing 20). It is contemplated that in the context of the present invention, fluid distribution accessories include but are not limited to faucets, sanitary fittings etc., laundry sinks bathrooms, bathtubs, shower heads, spas, swimming pools, aquariums, plumbing related fixtures, agricultural related Pipe fittings or aquatic related pipe fittings. Furthermore, a fluid distribution fitting is defined as a fitting capable of having an inlet and an outlet for fluid flow therethrough. The longitudinal shaft 10 may be adapted to be connected with a fluid distribution fitting for fluid communication.

Referring to FIG. 4 , in this embodiment, the body 16 includes a plurality of disc-shaped members 17 . Each disc member 17 includes a wing-shaped protrusion 19 protruding radially from the outer peripheral surface of the disc member 17 . Each disc member 17 has an elongated and flat profile relative to the diameter of the disc member. In another embodiment of the invention, an impeller with wing-shaped noses and disc-shaped members can also be used. The size of the disc member may vary depending on the purpose of use of the disc member. For example, in plumbing fittings or plumbing fittings, the diameter of the disc member may be less than 2 inches, while the diameter of the disc member may reach or exceed 6 inches if the disc member is used in a swimming pool or submerged underwater. However, those skilled in the art will understand that the size of the disc member will not be limited by the above examples, but may include a range of diameters depending on the application for which the disc member is used. Wing-shaped protrusions 19 are arranged on the outer peripheral surface of the disc-shaped member 17 in a predetermined manner. In one embodiment, the wing-shaped protrusions 19 are disposed on the outer circumferential surface of the disc-shaped member 17 or the body 16 such that the protruding members 19 do not overlap each other. The body 16 can be assembled by joining together eighteen disc-shaped members. Those skilled in the art will understand that although 18 disc members are used, the number of disc members may vary according to use and purpose. FIG. 8 shows a plan view of the disc member 17 or body 16 in which the wing-shaped protrusions 19 do not overlap each other leaving a slight gap between each protruding member 19 . Eight wing-shaped protrusions 19 are located on the outer circumferential surface of the disc-shaped member 17 or the body 16 . It is contemplated that those skilled in the art will appreciate that the number of wing-shaped tabs is not limited to eight but may vary. FIG. 5 shows a sine wave, describing its relationship to the fluid flow on the peripheral surface of the cylindrical body 16 or disc-shaped member 17 . To achieve efficient generation of nanobubbles from the longitudinal shaft 10, fluid flow through the longitudinal shaft may comprise less than two cycles. The principle and operation of fluid flow through the longitudinal shaft and airfoil nose will be explained in further detail.

Referring to FIG. 6 , the longitudinal shaft 10 has a first end 12 , a second end 14 and some of a plurality of disc-shaped members 17 forming a cylindrical body 16 . There are advantages in using a plurality of disc-shaped members 17 to form the cylindrical body 16 . The disc member 17 allows flexibility in assembling a longitudinal axis suitable for its intended purpose and objectives. For example, if the disc member is used in a shower head, the number of disc members in the shower handle can be maximized to efficiently generate nanobubbles for the best benefit of the user. In another example, if the disc-shaped members are used in aquaculture-related fluid distribution fittings submerged in water, the number of disc-shaped members can likewise be tailored so as to generate nanobubbles suitable for the purpose, i.e., in the region of Provides elevated oxygen concentration to living plants and fish. Furthermore, since a die is required for the manufacture of the disc-shaped member, the disc-shaped member can be easily manufactured. As the disc members are easily connected to each disc member to form the body, it is also easy to assemble by the end user.

To ensure that the disc members 17 are held together in a fixed manner to ensure efficient generation of nanobubbles, various ways of coupling the disc members to form the longitudinal axis are possible. For example, the first end 12 and the second end 14 are capable of receiving connecting members. The connecting member may be a connecting rod (not shown). A connecting rod can be inserted through the axial through hole of each disc member 17 to hold the disc members together. The through hole is located at the center of the disc member 17 . In another embodiment, each disc member 17 has a first mating portion and a second mating portion at each end of the disc member 17 where the disc member contacts an adjacent disc member 17 . The first fitting portion and the second fitting portion are complementary (fitted) to each other such that either fitting portion can receive the other fitting portion to connect the first fitting portion of the disc member 17 with the second fitting portion of the adjacent disc member in Together. An example of a complementary fit may be a threaded end which can be easily screwed in for connection. Another example of a complementary fit involves a protruding member and a complementary recess for receiving the protruding member.

FIG. 7 shows a side view of the disc member 17 with its wing-shaped nose 19 . As described above, the wing-shaped protrusions 19 are regularly arranged on the outer circumferential surface of the disc-shaped member 17 such that these wing-shaped protrusions 19 do not overlap each other. The wing-shaped nose 19 has a leading edge 14 and a trailing edge 15 (ie two pointed ends). The chord line 13 of the wing-shaped nose 19 is inclined at an angle of about 15 degrees from the plane line B-B at both ends of the disc-shaped member 17 or at an angle of about 75 degrees from the axis A-A of the disc-shaped member 17 . In other words, the tilt angle is the angle of attack of the fluid against the airfoil nose. The angle of inclination may range between 10 and 25 degrees relative to the line B-B of the disc member 17, or between 65 and 80 degrees from the axis A-A of the disc member 17. Wing-shaped bosses 19 also protrude radially from the outer circumferential surface of the disc-shaped member 17 . The protruding length of the wing-shaped protrusion 19 from the surface of the disc-shaped member 17 is related to the diameter of the disc-shaped member 17, the fluid flow rate and the pressure of the fluid inlet. Thus, those skilled in the art will appreciate that many combinations of the length of the protrusion relative to the diameter of the disc-shaped member 17 are possible due to the relationship to the parameters described above.

Fig. 8 shows that the determining reference of the spacing (angle) of the wing-shaped protrusions 19 staggered on two disc-shaped members 17 connected together is: on the two disc-shaped members 17 adjacent up and down corresponding (up and down two ) The line connecting the trailing edge 15 (or leading edge 14) of the wing-shaped convex head 19 is C, and the line C is also connected with the leading edge of the (left and right) adjacent wing-shaped convex head 19 on the same disc member 17 14 (or trailing edge 15); Of course, there is also a certain distance between the connecting lines C of the leading edges 14 (or trailing edges 15 ) of (left and right) adjacent wing-shaped protrusions 19 on the same disc-shaped member 17 .

FIG. 9 shows a top view of the disc member 17 and its wing-shaped nose 19 . In this embodiment, a through hole 171 is provided at the center of the disc member 17 for allowing insertion of a connecting rod to hold the plurality of disc members 17 together.

FIG. 10 shows the longitudinal shaft 10 when connected to a fluid supply inlet 301 and to an outlet 401 for discharging nanobubbles generated by the longitudinal shaft 10 . The fluid supply inlet 301 and outlet 401 may be in the form of flexible hoses or water fixtures, the longitudinal shaft 10 together with its tubular member 20 being adapted, in use, to be connected to flexible hoses 30, 40 at the inlets and outlets of the tubular member 20 . The fluid inlet pressure at the fluid supply inlet is preferably between 0.5 bar and 6 bar. Water enters the inlet 22 of the tubular member 20 as it flows through the fluid supply inlet. The fluid flow is directed by a conical guide 12 close to the inlet of the longitudinal axis and is fed into the winged nose 19 of the body. When the fluid flow passes through the flow channel between two wing-shaped bosses 19, the fluid converges and experiences a Venturi effect due to the velocity of the fluid flow increasing as the fluid flow passes through the wing-shaped bosses 19 . As the fluid flow exits the flow channel, the fluid flow encounters the divergent flow from the other airfoil nose 19 in its path, which separates the fluid flow through the subsequent flow channel. Repeated converging and diverging fluid flow through multiple flow channels creates velocity and pressure fluctuations and accelerates the formation of eddies known as the Coanda effect. This results in cavitation from rapidly swirling nanobubbles formed by fluid flow passing through multiple flow channels (the fluid must contain dissolved gases such as oxygen, ozone, hydrogen, etc., such as 7PPM oxygen in water). The fluid flow is swirled through the flow channel (see FIG. 9 and above) in less than two cycles and is directed by a tapered guide at the outlet of the tubular member 20 . The fluid stream exiting the tubular member 20 will contain a substantial amount of nanobubbles.

In the field of microelectronics, the wafer cleaning process is a tedious and lengthy series of multiple processing steps. Some steps of the wafer cleaning process require removal of organic contaminants from the wafer by soaking the wafer with copious amounts of deionized water (DI water). Using nanobubble technology in a wafer cleaning process can provide the benefit of reducing the time taken for the cleaning process. The slow rise rate and expanded suspension rate of the nanobubbles in the water will allow tiny foreign particles adsorbed to the wafer to be attracted into the nanobubbles when the nanobubble-filled water comes into contact with the wafer. The nanobubbles will remove the impurities by separating them from the wafer when the nanobubbles collapse. Therefore, the use of nanobubble-filled water in cleaning silicon wafers can increase the efficiency of the wafer cleaning process by reducing rinse time and water consumption during the cleaning process.

It will be apparent that various other modifications and adaptations of this application will be apparent to those skilled in the art upon reading the foregoing disclosure without departing from the spirit and scope of this application, and it is intended that all Such modifications and adaptations are within the scope of the appended claims.

Claims (10)

1. for generation of a device for nano bubble, it is characterized in that the longitudinal axis comprising tube-like envelope and be coaxially arranged in this tube-like envelope is respectively equipped with fluid intake and fluid issuing at the two ends of this tube-like envelope; This longitudinal axis has first end, body and the second end, and described first end and described the second end are suitable for being connected with the two ends of described body, and described first end and described the second end all have tapered guide part; Described body comprises cylinder and along being distributed in the wing plush copper of this cylinder outer peripheral face, the cross sectional shape of this wing plush copper is the date core shaped that two arcs form relatively, the line that two of date core shaped are most advanced and sophisticated and this cylindrical axis inclination 70-80 degree angle; Along circumference and axial uniform intervals layout this wing plush copper multiple of this cylinder periphery; Stagger between this wing plush copper of adjacent one week identical spacing.

2. the device for generation of nano bubble according to claim l, is characterized in that, described body is coaxially formed by connecting by multiple disc-shaped component, is at least provided with the wing plush copper described in a week at the outer peripheral face of each this disc-shaped component.

3. the device for generation of nano bubble according to claim 2, it is characterized in that, axial through hole is provided with at described disc-shaped component, the through hole of multiple disc-shaped component inserts a connecting rod and interconnects, and the two ends of described connecting rod are connected with described first end and described the second end.

4. the device for generation of nano bubble according to claim 2, is characterized in that, one end of this adjacent disc-shaped component is fitted together by the mutual grafting in the first auxiliary section and the second auxiliary section cooperatively interacted.

5. the device for generation of nano bubble according to claim 4, it is characterized in that, described first auxiliary section is the blind screw hole at one end place being located at described disc-shaped component, and described second auxiliary section is the screw rod that the axis at the other end place being located at described disc-shaped component is outstanding, is screwed in this blind screw hole be interconnected by adjacent disc-shaped component by this screw rod.

6. the device for generation of nano bubble according to claim 1, is characterized in that, the first end of the described longitudinal axis is connected with described body by interference engagement with the second end.

7. the device for generation of nano bubble according to claim 1, it is characterized in that, described tube-like envelope comprises the first connecting elements of being associated with described fluid intake and comprises the second connecting elements be associated with described fluid issuing, this first connecting elements with the opposite end of described fluid intake and being coaxially connected with the opposite end of described fluid issuing of this second connecting elements.

8. the device for generation of nano bubble according to claim 7, is characterized in that, this first connecting elements with the opposite end of described fluid intake and being threaded connection with the opposite end of described fluid issuing of this second connecting elements.

9. the device for generation of nano bubble according to claim 1, is characterized in that, described tube-like envelope is the fluid distribution accessory of the tubulose on various facility.

10. the device for generation of nano bubble according to claim 1, is characterized in that, two ends convergent on the direction towards described fluid intake or fluid issuing of described tube-like envelope, and the shape identical with the described tapered guide part of the described longitudinal axis; Described fluid intake and the described fluid issuing of described tube-like envelope are equipped with external screw thread.