Pipe insert for generating nanobubbles and nanobubble generator comprising the same

Abstract

To provide a pipe insert for generating nanobubbles which, by being simply inserted into a general water supply pipe, enables nanobubble water of good quality in terms of concentration and micronization to be directly discharged from a faucet or a shower head, so that nanobubble water having various advantages can be conveniently and universally utilized in any environment, without imposing a burden in terms of cost or installation space; and to provide a nanobubble generator comprising the same.SOLUTION: A pipe insert for generating nanobubbles is inserted and installed inside a pipe for piping in the longitudinal direction of the pipe, wherein in order to further form a friction surface of a gas-liquid mixture fluid for generating nanobubbles in the pipe, an insert body is surrounded by a main wall, and one or more of division walls dividing a flow passage space of the pipe and space dividers protruding into the flow passage space are continuously formed in the longitudinal direction of the pipe, and around the main wall, one or more spacer protrusions for maintaining a spacing between the main wall and an inner wall of the pipe are continuously formed in the longitudinal direction of the pipe.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a pipe insert for generating nanobubbles, which, by simply inserting it into a general water supply pipe, enables high-quality nanobubble water to be directly discharged into a faucet, shower, or the like in terms of concentration and size of the nanobubbles, thereby enabling nanobubble water with various advantages to be conveniently and universally used in any environment, including an ordinary home, without burdening the cost or installation space, and also relates to a nanobubble generating device including the same. [Background technology]

[0002] Nanobubbles, which are ultra-fine bubbles typically measuring less than a few hundred nanometers, possess physical and chemical properties such as gas dissolution, self-pressurization, and electrostatic charging, enabling them to be used in a variety of applications. They are used in a variety of fields, including the purification of wastewater. In particular, in fields such as medicine, sterilization, disinfection, deodorization, and cleaning, they have superior effects that are on a different level from microbubbles of μm size.

[0003] Considering the miniaturization of bubbles, for example, when frictional pressure is applied to a gas-liquid mixture fluid in which oxygen is mixed with water, the fluid has the property of reducing frictional resistance by generating heat as a reaction to the friction, causing the bubbles to become miniaturized and smooth.

[0004] As described above, when the gas-liquid mixture fluid flows under pressure and rubs against the inner surface of the flow path, the gas bubbles contained in the gas-liquid mixture fluid are tensile-deformed along the friction surface to reduce frictional resistance, and then are broken down into small bubbles as shown in FIG. 1, which is refined until nanobubbles are generated. The present applicant defines this as the "principle of bubble refinement and nanobubble generation due to friction."

[0005] According to the above-mentioned nanobubble generation principle, the larger the friction area of ​​a unit volume of gas-liquid mixture fluid facing the inner surface of the flow channel, the higher the friction speed, the longer the friction duration, and the more oxygen contained in the liquid, the better the quantitative and qualitative nanobubble generation will be. Furthermore, if the friction surface with the fluid per cross-sectional area of ​​the flow channel is expanded, the flow length required to generate nanobubbles can be shortened.

[0006] The present applicant has previously disclosed Korean Patent Registration No. 10-2100074 (published on May 15, 2020, hereinafter referred to as "Prior Art 1"), focusing on the principle of nanobubble generation due to friction.

[0007] As shown in FIG. 2, the above-mentioned prior art 1 is a flow path member 100 having a flexible tubular body and one or more partition walls 111 (see FIG. 2a) or space dividers 112 (see FIG. 2b) formed therein to divide the flow path space into multiple parts in order to expand the friction area of ​​the gas-liquid mixture fluid.

[0008] In the flow path member 100 of the above-mentioned Prior Art 1, the dividing walls 111 and space dividers 112 are densely formed in the flow path space, which increases the length around the cross section of the flow path space that serves as the friction surface, thereby expanding the friction area per unit flow path area. As a result, nanobubbles can be generated significantly in terms of concentration simply by the bubbles contained in the gas-liquid mixture fluid passing through a flow path of a set length.

[0009] The thinner the dividing walls 111 or space dividers 112 are, the more densely they can be formed, which is advantageous for expanding the friction surface.

[0010] The flow path member 100 of Prior Art 1 is manufactured by extruding a soft material such as silicone, which has the advantage of being easily bendable, but has the disadvantage of being vulnerable to the inflow pressure of fluid and causing expansion.

[0011] Methods for preventing the expansion of the flow path member 100 include making the main wall thick enough to withstand the inflow pressure of the fluid, or fitting an expansion prevention member, also known as a mesh tube or "expander tube," to the outside of the body of the insert material.

[0012] However, when the main wall is thickened, there is a problem that extrusion is difficult due to a large difference in thickness between the main wall and the partition wall or space partition, which is advantageously formed as thin as possible, and there is a problem that material costs increase.

[0013] Furthermore, when a mesh tube is used, the task of fitting it over the entire length of the flow path member is extremely cumbersome, resulting in the problem of wasting too much time and man-hours.

[0014] Meanwhile, Korean Patent Publication No. 10-2018-0131664 (published on December 11, 2018, hereinafter referred to as "Prior Art 2") discloses a "circulation-type nanobubble generator 200" that includes a mixing chamber 220, a spiral splitter 230, and a saturation tank 240, and circulates a gas-liquid mixture to generate nanobubbles (see FIG. 3a).

[0015] The spiral splitter 230 of the above-mentioned prior art 2 is spiral-shaped to increase its length, and further has second, third, and fourth separator plates 231 formed inside in stages on the first separator plate to increase the bubble generation efficiency (see Figure 3b).

[0016] The spiral splitter 230 having the above configuration cannot generate nanobubbles by itself, and in order to generate nanobubbles significantly from the viewpoint of concentration by itself, the separation plates 231 must be densely constructed and must have a sufficient length of at least several meters.

[0017] If the spiral splitter 230 of the above configuration were straight, it would be possible to extrude it to have the length necessary for generating nanobubbles.

[0018] However, in order for the separation plate 231 to be densely formed, its thickness must be significantly thinner than that of the main wall 232 having a supporting force.

[0019] As described above, if there is a large difference in thickness between the separator plate 231 and the main wall 232, extrusion becomes difficult. If there is no difference in thickness, the flow path becomes narrower than the diameter of the pipe, which reduces the efficiency of nanobubble generation and increases the material cost.

[0020] Furthermore, the spiral splitter 230 of Prior Art 2 is configured as a non-linear spiral, which makes it difficult to extrude and makes it difficult to achieve a continuous flow length of several meters or more.

[0021] The reason is that in the process of forcibly twisting a straight line into a spiral, the separator plate 231 collapses (see Figure 3c), and if the spiral is repeatedly twisted continuously, the separator plate collapses alternately at each twisting inflection point, clogging the flow passage and making it difficult for water to flow.

[0022] On the other hand, nanobubble water can be generated and discharged using the flow path member 100 of Prior Art 1 for sink water or shower water in an ordinary household.

[0023] In order to connect the flow path member to a water supply valve of a sink or the like, the flow path member kit for generating nanobubbles is provided with pipe joint connectors at both ends, one end of which is connected to a water supply pipe of a tap and the other end of which is connected to a water supply valve such as a faucet.

[0024] However, when installing a flow path component kit for generating nanobubbles in an ordinary home, etc., there is generally not enough space in an environment where a water tap is installed, so the kit must be installed exposed to the outside. In addition, there are disadvantages such as the need for cumbersome connection work.

[0025] If the flow path member could be replaced with a water supply pipe, all of the above problems would be easily resolved, and nanobubble water, which has amazing advantages, would be conveniently available anywhere.

[0026] However, the flow path member 100 is made of a flexible material and can be bent freely, but it lacks the support strength of general lightweight piping pipes, and has the disadvantage of being difficult to install, as it must be embedded in a wall using piping connecting members such as elbows and tees, as with general piping. Summary of the Invention [Problem to be solved by the invention]

[0027] The present invention is intended to solve the above problems, The object of the present invention is to provide a pipe insert for generating nanobubbles, which can be inserted into an ordinary water supply pipe without a separate device, and which allows high-quality nanobubble water to be directly discharged into a faucet, shower, etc. in terms of concentration and size of the nanobubbles, thereby enabling nanobubble water with various advantages to be conveniently and universally used in any environment, including ordinary homes, without burdening costs or installation space, and a nanobubble generating device including the same.

[0028] Another object of the present invention is to provide a pipe insert for generating nanobubbles, which creates a dense friction surface inside a flow path but does not require measures to prevent expansion, thereby improving productivity and reducing costs.

[0029] Another object of the present invention is to provide a pipe insert for generating nanobubbles, which can be easily extruded without increasing the thickness difference between the main wall, partition walls, space partitions, and other internal components, while densely forming a friction surface. [Means for solving the problem]

[0030] In order to achieve the above object, the pipe insert for generating nanobubbles according to the present invention comprises: An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The insert body is characterized in that at least one of a partition wall dividing the flow passage space of the pipe and a space partition projecting into the flow passage space is continuously formed in the longitudinal direction of the pipe.

[0031] The insert body may be surrounded by a main wall, and one or more spacer protrusions may be formed around the main wall continuously in the longitudinal direction of the pipe to maintain a gap between the main wall and the inner wall of the pipe.

[0032] The nanobubble generating pipe insert of one embodiment according to the present invention comprises: An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The main body has one or more compartments, and one or more sub-bodies are inserted into the compartments of the main body in a longitudinal direction. The main body and the sub-body each include at least one of a dividing wall that divides the flow passage space of the pipe and a space divider that protrudes into the flow passage space.

[0033] The nanobubble generating pipe insert of one embodiment according to the present invention comprises: An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The insert body has a spiral cross section and is formed continuously in the longitudinal direction of the pipe.

[0034] The insert body has a plurality of protrusions formed thereon, The protrusions may be strip-like or point-like protrusions formed continuously in the longitudinal direction of the pipe.

[0035] In order to achieve the above object, the nanobubble generating device according to the present invention comprises the above-mentioned pipe insert for generating nanobubbles. [Effects of the Invention]

[0036] According to the nanobubble generating pipe insert of the present invention having the above-mentioned configuration, By simply inserting the device into a regular water supply pipe without any additional equipment, high-quality nanobubble water can be directly discharged into a faucet or shower, etc., due to its high concentration and fine size. This has the remarkable effect of making nanobubble water with various advantages convenient and versatile for use in any environment, including ordinary homes, without burdening costs or installation space.

[0037] Furthermore, a normal pipe can be arbitrarily adopted and used as a nanobubble generating means, which can dramatically improve the convenience of nanobubble generation.

[0038] Furthermore, since the insert is inserted into a pipe, no measures are required to prevent the insert body from expanding, which can reduce productivity and costs.

[0039] In addition, since the insert body is inserted into a separate pipe for protection, it is not necessary to provide a main wall, and even if it is provided, there is no need to make a large difference in thickness between it and partition walls, space partitions, etc., which has the advantage of making extrusion manufacturing easier.

[0040] Furthermore, by using a nanobubble generating device including the nanobubble generating pipe insert, nanobubble water with excellent micronization quality can be easily produced in small to large quantities. [Brief explanation of the drawings]

[0041] [Figure 1] FIG. 1 is a diagram illustrating the principle of nanobubbles generation by friction. [Figure 2] 1A and 1B are diagrams showing the configuration of Prior Art 1, where (a) is a perspective view, (b) is a cross-sectional view of (a), and (c) is a cross-sectional view of another example corresponding to (b). [Figure 3] 1A and 1B are drawings showing the configuration of Prior Art 2, where (a) is an overall configuration diagram, (b) is an enlarged cross-sectional view of the spiral splitter of (a), and (c) is a diagram showing the deformed state of (b). [Figure 4] FIG. 1(a) is a perspective view showing the configuration of one embodiment of the present invention, and FIG. 1(b) is a perspective view showing the state in which the present invention of (a) is inserted into a pipe. [Figure 5] 5A is an enlarged cross-sectional view taken along line AA in FIG. 4, and FIG. 5B is an enlarged cross-sectional view taken along line BB in FIG. [Figure 6] 1(a) and 1(b) are front views showing the configuration of an embodiment according to the present invention. [Figure 7] 1(a) and 1(b) are front views showing the configuration of an embodiment according to the present invention. [Figure 8] 1 is a front view showing a configuration of an embodiment according to the present invention. [Figure 9] 1A and 1B are front views showing the configuration of an embodiment of the present invention, in which FIG. 1A is an exploded view and FIG. 1B is an assembled view. [Figure 10] 1A and 1B are front views showing the configuration of an embodiment of the present invention, in which FIG. 1A is an exploded view and FIG. 1B is an assembled view. [Figure 11] 1 is a partially exploded front view showing the configuration of an embodiment of the present invention. [Figure 12] 1A and 1B are diagrams showing the configuration of an embodiment of the present invention, in which (a) is a front view showing a state in which a piping pipe is inserted, and (b) is a partial view showing a state in which the piping pipe is unfolded. [Figure 13] 1A and 1B are diagrams showing the configuration of an embodiment of the present invention, in which (a) is a front view showing a state in which a piping pipe is inserted, and (b) is a partial view showing a state in which the piping pipe is unfolded. [Figure 14] 1 is a partial installation diagram of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0042] Hereinafter, embodiments of a pipe insert for generating nanobubbles and a nanobubble generating device including the same according to the present invention will be described in more detail with reference to the accompanying drawings.

[0043] The present invention was invented based on the above-mentioned "principle of micronization of bubbles and generation of nanobubbles by friction," As shown in FIGS. 4 to 9 , a pipe insert 1 for generating nanobubbles according to one embodiment of the present invention is an insert inserted into a piping pipe 2 in the longitudinal direction of the pipe. In order to further create a friction surface for a gas-liquid mixture fluid for generating nanobubbles in the pipe 2, the insert body has at least one of dividing walls 11 that divide the flow path space of the pipe 2 and space dividers 12 that protrude into the flow path space, which are continuously formed in the longitudinal direction of the pipe 2.

[0044] The partition walls 11 are connected to each other to form a closed space, and have the function of forming a friction surface for the fluid as well as supporting the structure of the insert body, and may be connected to the main wall 13 described later.

[0045] The space partition 12 has a tip end positioned above the space, and unlike the dividing wall 11, does not form a closed space.

[0046] The insert body is formed by multiple layers of one or more of the partition walls 11 and space dividers 12 to form a friction surface assembly, and the outer tip of the insert body may be close to or in close contact with the inner wall 21 of the pipe (see Figure 4b and Figure 5b).

[0047] The outer contour of the insert body may be formed to correspond to the cross-sectional configuration of the pipe 2 to be inserted.

[0048] The insert body is surrounded by a main wall 13, around which one or more spacer protrusions 14 may be formed continuously in the longitudinal direction of the pipe 2 to maintain a gap between the main wall 13 and the pipe inner wall 21 (see Figures 4 to 6).

[0049] The main wall 13 is an outer wall that surrounds the outer periphery of the body, and like the partition walls 11, it functions as a friction surface for fluid and also supports the structure of the insert body.

[0050] As described above, the insert body consisting of either or both of the partition wall 11 and the space divider 12 is surrounded by the main wall 13, and the configuration having the spacer protrusions 14 around the main wall 13 can also be said to be a configuration in which the spacer protrusions 14 are added to the flow path member of prior art 1 (see Figure 2).

[0051] The spacer projections 14 function to maintain the gap between the main wall 13 and the inner wall of the pipe, and also function as a friction surface for the fluid.

[0052] The insert body can be configured in various ways, such as a form in which a plurality of the partition walls 11, space dividers 12, main walls 13, and spacer protrusions 14 are combined (see Figures 4 and 5), a form in which the space dividers 12 are omitted (see Figures 6a and 6b), a form in which the main walls 13 are omitted (see Figures 7 and 8), a form consisting of a plurality of space dividers 12 and spacer protrusions 14 (see Figure 7b), a form consisting only of a plurality of partitions 12 (not shown), or a form consisting only of a plurality of partition walls 11 (not shown).

[0053] In addition, one or more of the dividing walls 11 and space dividers 12 of the insert body can be formed in various ways, such as a radial or concentric structure (see FIGS. 5 to 7), or a lattice structure (see FIG. 8).

[0054] The insert body can be divided into two or more divided bodies 1-1 and 1-2 (see FIG. 9).

[0055] As shown in FIGS. 10 and 11, a pipe insert 1M for generating nanobubbles according to one embodiment of the present invention is an insert inserted into a piping pipe in the longitudinal direction of the pipe, The pipe 2 may include a main body 1a that forms one or more zone spaces (s) to further create a friction surface for the gas-liquid mixture fluid to generate nanobubbles within the pipe 2, and one or more sub-bodies 1b that are inserted longitudinally into the zone spaces (s) of the main body 1a, and the main body 1a and the sub-body 1b may each include at least one of a partition wall 11 that divides the flow path space of the pipe and a space divider 12 that protrudes into the flow path space.

[0056] The main body 1a may be formed with multiple zone spaces (s), and a sub-body 1b having multiple space dividers 12 formed therein may be inserted into each zone space (s). The zone spaces (s) may be surrounded by a partition wall 11, or one side may be open (see FIGS. 10 and 11).

[0057] This configuration allows for the formation of a dense friction surface even in large pipes with a wide internal space, making it possible to generate large volumes of nanobubble water.

[0058] The insert body of the pipe insert 1, 1M for generating nanobubbles according to the invention is preferably extruded.

[0059] The insert body may be made of a light or soft material.

[0060] As shown in FIGS. 12 and 13, a pipe insert 1S for generating nanobubbles according to one embodiment of the present invention is inserted into a piping pipe in the longitudinal direction of the pipe, and the cross section of the body may be spiral and continuously formed in the longitudinal direction of the pipe to further create a friction surface for the gas-liquid mixture fluid for generating nanobubbles in the pipe.

[0061] The spiral-shaped insert body has multiple protrusions formed thereon to add friction area as well as provide a spacer function, but the protrusions may be strip-shaped protrusions 17 formed continuously in the longitudinal direction (see Figure 12) or conical, etc., dot-shaped protrusions 18 arranged in a matrix (see Figure 13).

[0062] The spiral insert body can also be extruded if the strips 17 are formed.

[0063] Furthermore, a plate on which the strip-like projections 17 and point-like projections 18 are formed can be wound up to form a spiral insert body (see Figs. 12b and 13b).

[0064] The shapes of the partition wall 11, the space divider 12, the main wall 13, the spacer protrusion 14, etc. refer to cross-sectional structures perpendicular to the longitudinal direction of the insert body.

[0065] The installation and operation of the nanobubble generating pipe inserts 1, 1M, and 1S according to the present invention having the above-described configuration will now be considered.

[0066] The present invention applies the principle of "frictional bubble refinement and nanobubble generation" to the principle of solving technical problems, and the fluid friction surface must be densely formed using the partition wall 11, space partition 12, main wall 13, spacer protrusions 14, 17, and 18, etc., and nanobubble water can be generated by a simple method of inserting the device into a general water supply pipe.

[0067] In the pipe 2 into which the present invention is inserted and installed, the dividing walls 11, space dividers 12, main walls 13, spacer protrusions 14, etc. inside the pipe function as friction surfaces for the fluid, expanding the friction area per unit flow path area. As a result, when bubbles contained in a gas-liquid mixture fluid pass through a flow path of at least several meters or more, nanobubbles can be generated significantly from the concentration aspect.

[0068] The present invention is configured such that an insert body having a densely formed friction surface for fluid is inserted into a general pipe to create a dense friction surface inside the pipe, like the flow path member 100 of the prior art 1, and is free from the problem of expansion due to the inflow pressure of fluid, which was a drawback of the flow path member 100.

[0069] Therefore, various restrictions due to the expansion of the flow path member 100 are eliminated, an expansion prevention member is not required, and troublesome processes requiring a lot of man-hours and time can be eliminated.

[0070] Furthermore, since the insert body consisting of the partition walls 11, space dividers 12, etc. is inserted into a separate pipe 2 and protected, it is not necessary to have a main wall, which is an essential component of a flow path member, and even if the main wall 13 is provided, there is no need to make a large difference in thickness between it and the partition walls 11, space dividers 12, etc., which makes extrusion manufacturing easier.

[0071] Furthermore, the nanobubble generating pipe insert according to the present invention can be manufactured according to the specifications of commercially available pipes and can be installed in any ordinary pipe, making it convenient and versatile.

[0072] In other words, the insert material according to the present invention does not require a custom-made pipe with specific specifications, and nanobubble water can be easily generated by arbitrarily adopting an ordinary pipe product, or conversely, by inserting a product of a set standard into a pipe of the set standard.

[0073] In this way, the insert material of the present invention can be freely adapted to the standards of plumbing pipes and can be freely installed using a straight pipe 2 and coupling members such as tees (T) and elbows that are commonly used in general water supply piping (see Figure 14).

[0074] The generation of nanobubbles may vary depending on the density of the partition walls 11 and space dividers 12, which serve as friction surfaces for the fluid, the length of the flow path in which the present invention is inserted into a pipe, the water temperature, etc., and the concentration and size of the generated nanobubbles.

[0075] During the development process of the present invention, the applicant requested an accredited organization (NANOSIGHT) to conduct a test to confirm the generation of nanobubbles by passing ordinary tap water through one embodiment of the flow path member 100 according to the above-mentioned prior art 1 (implemented on 2021-02-05 17-28-52).

[0076] The flow path member used in the test had an outer diameter of 15 mm, an inner diameter of 13 mm, and a length of 3.5 m. The ratio of the length of the flow path space periphery (friction surface) to the cross-sectional area of ​​the flow path space was 2.7 times, and the water temperature when passing through the flow path member was 38°C.

[0077] The nanobubbles generated in this experiment were confirmed to be approximately 527 million per ml of water, with an average nanobubble size of 91.2 nm (graph omitted).

[0078] Considering that conventional nanobubble generators are complex in configuration and relatively large in scale, and the number of nanobubbles generated by such devices is approximately 200 million per ml of water, the above test results, obtained simply by passing water through a flow path member (3.5M) with a simple configuration, demonstrate the excellent performance of the flow path member, which forms a dense friction surface in nanobubble generation.

[0079] The nanobubble generating pipe insert of the present invention is inserted into a water supply pipe and performs the same function as the flow path member 100, and as confirmed by the above test, can effectively generate nanobubble water that has excellent properties in sterilization, disinfection, deodorization, cleaning, etc.

[0080] Therefore, without installing a separate device for generating nanobubbles, nanobubble water with excellent advantages can be directly discharged from a faucet or shower simply by inserting the present invention into a water supply pipe that is always attached to a sanitary water supply facility such as a sink or shower, a washing machine, or a dishwasher.

[0081] Furthermore, any ordinary pipe can be selected and used as a nanobubble generating means, which dramatically improves the convenience of nanobubble generation.

[0082] The insertion installation of the water supply pipe 2 according to the present invention can be carried out at the construction stage of the building.

[0083] The nanobubble generating device according to the present invention comprises the nanobubble generating pipe insert.

[0084] Therefore, with an extremely simple configuration, nanobubble water with excellent micronization quality can be easily and versatilely produced in small to large quantities.

[0085] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings.

[0086] Here, the terms and words used in the present specification and claims should not be interpreted limitedly to their ordinary or dictionary meanings, but should be interpreted in terms of meanings and concepts consistent with the technical idea of ​​the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent the technical idea of ​​the present invention, and therefore it should be understood that various equivalents and modifications may exist as of the time of filing this application. [Industrial Applicability]

[0087] As described above, the nanobubble generating pipe insert according to the present invention and the nanobubble generating device including the same enable high-quality nanobubble water to be directly discharged into a faucet, shower, or the like in terms of concentration and size of the nanobubble, and nanobubble water having various advantages can be conveniently and universally utilized in any environment, and has good industrial applicability.

Claims

1. An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The insert body is characterized in that at least one of a partition wall dividing the flow path space of the pipe and a space partition protruding into the flow path space is continuously formed in the longitudinal direction of the pipe. Pipe insert for generating nanobubbles.

2. The insert body is surrounded by a main wall, and one or more spacer protrusions are continuously formed around the main wall in the longitudinal direction of the pipe to maintain a gap between the main wall and the inner wall of the pipe. The nanobubble generating pipe insert according to claim 1.

3. An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The device includes a main body that defines one or more compartments, and one or more sub-bodies that are inserted longitudinally into the compartments of the main body. The main body and the sub-body each include at least one of a partition wall that divides a flow path space of the pipe and a space partition that protrudes into the flow path space. Pipe insert for generating nanobubbles.

4. An insert member that is inserted into a piping pipe in the longitudinal direction of the pipe, In order to further create a friction surface of the gas-liquid mixture fluid to generate nanobubbles in the pipe, The cross section of the insert body is spiral and is formed continuously in the longitudinal direction of the pipe. Pipe insert for generating nanobubbles.

5. The insert body has a plurality of protrusions formed thereon, The protrusions are strip-like protrusions or point-like protrusions formed continuously in the longitudinal direction of the pipe. The nanobubble generating pipe insert according to claim 4.

6. The nanobubble generating pipe insert according to any one of claims 1 to 5, Nanobubble generator.

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