Fluid treatment device

Abstract

The present disclosure relates to a fluid treatment device capable of treating a fluid by generating a plasma in a flowing fluid. According to one embodiment of the present invention, a fluid treatment device comprises: a hollow outer body; the guide assembly is contained in the outer body to provide a first flow path and a second flow path, the first flow path is in the shape that at least one part of the diameter of the first flow path is decreased in the flowing direction of the fluid, and the second flow path is in the shape that at least one part of the diameter of the second flow path is increased in the flowing direction of the fluid so that bubbles contained in the fluid passing through the first flow path can collapse; and a screw housed in the outer body positioned upstream of the guide assembly based on a flow direction of the fluid to generate a fluid vortex wherein an inner surface of the outer body includes an expansion portion having a diameter gradually expanding in a direction away from a distal end of the guide assembly.

Description

Technical Field

[0001] The present disclosure relates to a fluid treatment device, and more particularly, to a fluid treatment device capable of treating a fluid by generating plasma in the flowing fluid. Background Art

[0002] Various technologies are currently being developed to convert fluids such as water into fluids with specific functions through electrolysis, magnetic treatment, ultrasonic treatment, plasma treatment, or similar technologies.

[0003] For example, one known fluid treatment technology is to generate plasma in air or water and then dissolve active substances such as oxygen and nitrogen in the water to generate plasma activated water (PAW).

[0004] Plasma-activated water is highly acidic and can be used as a disinfectant or pesticide. It can also be used as liquid fertilizer because it contains a large amount of nitrogen oxides. Furthermore, it can be used to disinfect medical tools in hospitals or treat patients' skin, and as an environmentally friendly detergent for washing vegetables and fruit at home.

[0005] To produce plasma-activated water, a technology that generates plasma is basically required to ionize the water.

[0006] Traditionally, the main method for producing plasma-activated water is to discharge electrodes placed in water to instantly generate plasma, and ionize the water through the plasma.

[0007] However, this method requires high voltage and is difficult to stably maintain the gas required to generate plasma in water, resulting in low production efficiency. Furthermore, there is the problem of high costs associated with establishing production facilities.

[0008] Furthermore, there is also known a method of producing plasma-activated water by generating plasma on the surface of water rather than in the water and causing the water and the plasma to react with each other.

[0009] However, this method produces very little ion-activated water compared to the time required to generate plasma, as current flows along the surface of the water during plasma generation. Furthermore, since plasma generation must be performed for a long time to produce large amounts of ion-activated water, maintenance costs are high. Summary of the Invention [Technical Issues]

[0010] The present disclosure is made in consideration of the above points, and the purpose of the present disclosure is to provide a fluid processing device that can generate plasma in the fluid by frictionally charging the flowing fluid without an external power supply or electrode, thereby ionizing and processing the fluid.

[0011] Problems of the present disclosure are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description. [Technical solution]

[0012] In order to solve the above problems, according to one embodiment, a fluid processing device includes: a hollow outer body; a guide assembly housed in the outer body to provide a first flow path and a second flow path, the shape of the first flow path is that the diameter of at least a portion thereof decreases along the flow direction of the fluid, and the shape of the second flow path is that the diameter of at least a portion thereof expands so that bubbles contained in the fluid passing through the first flow path collapse; and a screw housed in the outer body, the screw being positioned upstream of the guide assembly based on the flow direction of the fluid to generate a vortex of the fluid, wherein the inner surface of the outer body includes an expansion portion, the diameter of the expansion portion gradually expands in a direction away from the distal end of the guide assembly.

[0013] The expanded portion may be formed in a curved shape.

[0014] A first expansion part connecting portion and a second expansion part connecting portion having a curved shape may be provided at both end portions of the expansion part, respectively.

[0015] A curved rounded portion may be provided around an edge of the distal end of the guide assembly adjacent the expansion portion.

[0016] The rounded portion may be configured as a curved surface having a curvature radius of 0.5 mm to 5 mm.

[0017] The guide assembly may include an inclined portion whose outer diameter gradually decreases along the flow direction of the fluid, and the outer body may include a contact portion protruding from the inner surface of the outer body and contacting the inclined portion to limit the movement of the guide assembly so as not to move along the flow direction of the fluid.

[0018] The shape of the contact portion may be configured such that an inner diameter thereof gradually decreases along a flow direction of the fluid so as to come into contact with the inclined portion.

[0019] A first inclined portion connecting portion having a convex curved surface with a first curvature radius may be provided at one end portion of the inclined portion, a second inclined portion connecting portion having a concave curved surface with a second curvature radius may be provided at the other end portion of the inclined portion, and a first contact portion connecting portion having a concave curved surface with the first curvature radius is provided at one end portion of the contact portion to contact the first inclined portion connecting portion, and a second contact portion connecting portion having a convex curved surface with the second curvature radius is provided at the other end portion of the contact portion.

[0020] The first radius of curvature may be 1 mm to 20 mm.

[0021] The first flow path may include a focusing flow path, wherein the fluid passing through the screw is introduced and its diameter gradually decreases along the flow direction of the fluid; and an inlet flow path connected to the distal end of the focusing flow path so that the fluid is introduced from the focusing flow path, the diameter of the inlet flow path being equal to the diameter of the distal end of the focusing flow path.

[0022] The second flow path may include an expansion flow path connected to the inlet flow path so that fluid is introduced from the inlet flow path, and having a diameter larger than that of the inlet flow path; and a reduction flow path connected to the expansion flow path so that fluid is introduced from the expansion flow path, and having a diameter smaller than that of the expansion flow path.

[0023] The guide assembly may include a connecting flow path, which is connected to the first flow path so that the fluid passing through the first flow path is introduced, and the diameter of the connecting flow path gradually expands along the flow direction of the fluid. An exhaust flow path may be set inside the external body, and the exhaust flow path is connected to the connecting flow path so that the fluid passing through the connecting flow path is introduced, and the diameter of the exhaust flow path is larger than the diameter of the expansion flow path and the diameter of the connecting flow path.

[0024] Preferably, the expansion inclination angle of the connecting flow path is greater than 0 degrees and less than 80 degrees.

[0025] The guide assembly may be made of a material that triboelectrically positively charges the fluid.

[0026] According to one embodiment of the present disclosure, the fluid processing apparatus may further include an accelerator accommodated in the outer body and facilitating collapse of bubbles contained in the fluid.

[0027] The accelerator may be formed in the shape of a metal ring.

[0028] At the same time, in order to solve the above problems, a fluid processing device according to another embodiment of the present disclosure includes: a hollow outer body; a first body, including a screw and a first fluid flow path, the first fluid flow path guides the flow of fluid through the screw and has a shape in which at least a portion thereof has a reduced diameter along the flow direction of the fluid, and is accommodated in the outer body; a second body, connected to the first body, including a second fluid path, the diameter of the second fluid path is relatively larger than one end of the first fluid path, so as to provide pressure changes for the fluid flowing through the first fluid path; and a third body, which includes a third fluid path connected to the second body, formed of a material with higher conductivity than the second body and having a third fluid path with a diameter relatively smaller than the second fluid path, so as to provide pressure changes for the fluid passing through the second fluid path, wherein an expansion portion positioned downstream of the third body according to the flow direction of the fluid and having a shape with a gradually expanding diameter is provided on the inner surface of the outer body.

[0029] The fluid treatment device according to another embodiment of the present disclosure may further include a fourth body connected to the third body, the fourth body having a fourth fluid path, into which the fluid passing through the third fluid path is introduced, wherein a curved rounded portion may be provided around an edge of a distal end of the fourth body adjacent to the expansion portion.

[0030] The rounded portion may be configured in a curved shape with a curvature radius of 0.5 mm to 5 mm.

[0031] According to another embodiment of the present disclosure, the fluid processing device may further include a fourth body connected to the third body, the fourth body having a fourth fluid path, and the fluid passing through the third fluid path is introduced into the fourth fluid path, wherein at least a portion of the fourth fluid path can be formed into a shape with a diameter gradually expanding along the flow direction of the fluid, and the expansion inclination angle of the expanded portion of the fourth fluid path can be greater than 0 degrees and less than 80 degrees. [Beneficial Effects]

[0032] According to the fluid treatment device of the present disclosure, a large number of fine bubbles with high negative charge density are generated at the interface through cavitation and friction charging of the flowing fluid, and the bubbles are collapsed in the fluid to generate plasma, thereby ionizing or decomposing the fluid.

[0033] Furthermore, according to the fluid treatment device of the present disclosure, the fluid can be ionized or decomposed without an external power source or electrodes, and the fluid can be treated efficiently with very little energy.

[0034] Furthermore, according to the fluid treatment apparatus of the present disclosure, functional water or activated water can be produced in large quantities with little investment cost.

[0035] The various advantages and effects of the present disclosure are not limited to the above contents, and the present disclosure also includes more different effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A fluid treatment system including a fluid treatment device according to one embodiment of the present disclosure is schematically shown.

[0037] Figure 2 is a cross-sectional view illustrating a fluid processing device according to one embodiment of the present disclosure.

[0038] Figure 3 yes Figure 2 A partial enlarged view of .

[0039] Figure 4 is a cross-sectional view illustrating an outer body of a fluid treatment device according to one embodiment of the present disclosure.

[0040] Figure 5 is an isolated view showing a portion of a fluid processing device according to one embodiment of the present disclosure.

[0041] Figure 6 FIG. 1 is a view illustrating a second guide of a fluid treatment device according to an embodiment of the present disclosure.

[0042] Figure 7 is a view showing a second guide according to another embodiment.

[0043] Figure 8 is a cross-sectional view illustrating a fluid processing device according to another embodiment of the present disclosure.

[0044] Figure 9 yes Figure 8 A partial enlarged view of .

[0045] Figure 10 It shows Figure 8 An isolated view of a portion of the fluid handling device shown in FIG. DETAILED DESCRIPTION

[0046] Hereinafter, a fluid processing device according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0047] Figure 1 is a schematic diagram of a fluid treatment system including a fluid treatment device according to one embodiment of the present disclosure, Figure 2 is a cross-sectional view illustrating a fluid processing device according to one embodiment of the present disclosure.

[0048] The fluid treatment device 100 according to one embodiment of the present disclosure can receive fluid from a fluid supply device 10, triboelectrically charge the flowing fluid without an external power source or electrodes to generate plasma within the fluid, thereby ionizing and treating the fluid. The fluid treated by the fluid treatment device 100 can be stored in a fluid storage device 20.

[0049] The fluid treatment device 100 according to one embodiment of the present disclosure can treat various fluids. For example, the fluid treatment device 100 according to one embodiment of the present disclosure can treat water with plasma to generate hydrogen-rich ions (H3O + ) plasma-activated water. The fluid supply device 10 supplies the water required to generate the plasma-activated water to the fluid treatment device 100, and the fluid storage device 20 can store the plasma-activated water generated by the fluid treatment device 100. The water supplied to the fluid treatment device 100 can be pre-treated water to remove foreign matter, and thus has low conductivity and high resistance.

[0050] As shown in the figures, the fluid treatment device 100 according to one embodiment of the present disclosure includes an outer body 110 , a screw 130 accommodated in the outer body 110 , and a guide assembly 140 .

[0051] The outer body 110 is formed as a hollow body that can accommodate the screw 130 and the guide assembly 140. Figures 2 to 4 As shown, outer body 110 has a through hole 111 formed therein, extending longitudinally through outer body 110. Through hole 111 forms a fluid flow path through which fluid can flow. Screw 130 and guide assembly 140 are housed within through hole 111. Furthermore, at least a portion of connecting tube 160, which guides fluid to screw 130, may also be housed within through hole 111.

[0052] A portion of through-hole 111 between guide assembly 140 and connecting tube 160 forms an inlet flow path 115 connecting guide assembly 140 and connecting tube 160, allowing fluid to flow. Screw 130 is disposed in inlet flow path 115. Furthermore, another portion of through-hole 111 forms an outlet flow path 113, through which the fluid passing through guide assembly 140 can flow. Exhaust flow path 113 is wider than the flow path disposed in guide assembly 140.

[0053] A boss 118 is provided within the outer body 110 to limit the movement of the guide assembly 140. The boss 118 protrudes from the inner surface of the outer body 110. The boss 118 can limit the movement of the guide assembly 140 by contacting the end portion of the guide assembly 140, thereby preventing the guide assembly 140 from moving along the fluid flow direction A. The boss 118 can be formed in an annular shape or in various other shapes that can contact the end portion of the guide assembly 140.

[0054] The boss 118 includes an expansion portion 120 and a contact portion 122. The contact portion 122 is disposed upstream of the expansion portion 120 based on a flow direction A of a fluid that will come into contact with the guide assembly 140.

[0055] The expansion portion 120 is formed into a curved shape, and its diameter gradually increases in a direction away from the distal end of the guide assembly 140. A first expansion portion connecting portion 120a and a second expansion portion connecting portion 120b are respectively provided at both ends of the expansion portion 120. Based on the flow direction A of the fluid, the first expansion portion connecting portion 120a is arranged upstream of the second expansion portion connecting portion 120b. The first expansion portion connecting portion 120a can form a convex curved surface with a constant radius of curvature. The second expansion portion connecting portion 120b can form a concave curved surface with a constant radius of curvature. The radius of curvature of the first expansion portion connecting portion 120a and the radius of curvature of the second expansion portion connecting portion 120b can be the same or different. The second expansion portion connecting portion 120b can be connected to the inner surface of the outer body 110, which divides the periphery of the discharge flow path 113 in a gently sloping manner.

[0056] The expansion portion 120 can form a flow path that expands in a gentle slope between the guide assembly 140 and the discharge flow path 113. When the inner surface of the external body 110 that contacts the fluid has a corner, the problem of charge concentration at the corner may occur. According to the fluid treatment device 100 of the present disclosure, the problem of charge concentration between the guide assembly 140 and the discharge flow path 113, or the problem of damage or rupture of the external body 110 or the guide assembly 140 due to charge concentration, can be reduced by providing the expansion portion 120 between the guide assembly 140 and the discharge flow path 113.

[0057] The contact portion 122 is formed into a shape in which the inner diameter gradually decreases along the flow direction of the fluid so as to maintain stable contact with the guide assembly 140. A first contact portion connecting portion 122a and a second contact portion connecting portion 122b are respectively provided at both ends of the contact portion 122. Based on the flow direction A of the fluid, the first contact portion connecting portion 122a is arranged upstream of the second contact portion connecting portion 122b. The first contact portion connecting portion 122a can form a concave curved surface with a constant radius of curvature. The second contact portion connecting portion 122b can form a convex curved surface with a constant radius of curvature. For example, the first contact portion connecting portion 122a can be formed as a curved surface with an arbitrary first radius of curvature, and the second contact portion connecting portion 122b can be formed as a curved surface with an arbitrary second radius of curvature. The first radius of curvature and the second radius of curvature can be the same or different.

[0058] The value of the first radius of curvature can be 1mm to 20mm. When the first radius of curvature is less than 1mm, the contact portion 122 may protrude from the inner surface of the outer body 110 at an acute angle. In this case, the size of the contact portion 122 or the length of the contact portion 122 (the length extending along the flow direction of the fluid) can become relatively small. Therefore, the pressure applied to the contact portion 122 by the fluid pressure from the guide assembly 140 is concentrated in a relatively small area, which increases the risk of damage to the contact portion 122. In addition, the contact area between the contact portion 122 and the guide assembly 140 may become smaller, causing the problem that the contact portion 122 cannot stably support the guide assembly 140.

[0059] Meanwhile, when the first radius of curvature exceeds 20 mm, the length of the contact portion 122 (the length extending in the flow direction of the fluid) may be too long, and the supporting force of the contact portion 122 may become weak. In this case, a problem may arise in which the pressure exerted by the fluid on the guide assembly 140 causes the guide assembly 140 to be pushed closer to the discharge flow path 113 than the designed size.

[0060] The curvature radius of the first contact portion connecting portion 122 a is not limited to the above dimensions and may be changed to varying degrees according to the outer diameter of the guide assembly 140 or the inner diameter of the outer body 110 .

[0061] The outer body 110 is made of an insulating material. For example, the outer body 110 can be made of a synthetic resin material such as acrylic, engineering plastics, or various dielectric materials.

[0062] refer to Figure 2 、 Figure 3 and Figure 5 Screw 130 is positioned upstream of guide assembly 140 based on the fluid flow direction A and is configured to rotate the fluid toward guide assembly 140. Preferably, screw 130 is made of a material that is prone to triboelectric negative charge, i.e., a material that triboelectrically charges the fluid. For example, screw 130 can be made of a synthetic resin material, such as acrylic resin, engineering plastics, or various dielectric materials.

[0063] The screw 130 has blades 131 for generating vortices in the fluid. The shape of the blades 131 formed can cause the fluid to rotate to generate a vortex. Therefore, the fluid passing through the blades 131 can flow in a vortex manner. When the fluid passes through the screw 130 quickly, a cavity phenomenon will be generated due to the rapid change in fluid pressure, resulting in the generation of small bubbles (B, for example, with a diameter of 50 μm or less) in the fluid. In addition, when the fluid passes through the screw 130 quickly, the fluid may be frictionally charged with positive charges. The screw 130 can be called a vortex deflector.

[0064] The screw 130 can be fixed to the inlet flow path 115 between the guide assembly 140 and the connecting tube 160 in various ways, such as being pressed into the outer body 110 or being clamped and fixed between the guide assembly 140 and the connecting tube 160. Therefore, the screw 130 can rotate the fluid without rotating. When the screw 130 is rotated by the flowing fluid, the friction charging efficiency between the fluid and the screw 130 may be reduced. In contrast, the fluid treatment device 100 according to one embodiment of the present disclosure can improve the friction charging efficiency of the fluid by guiding the fluid while the screw 130 is fixed.

[0065] In the drawings, the diameter of the screw 130 corresponds to the diameter of the inlet flow path 115 , but the diameter of the screw 130 may be smaller than the diameter of the inlet flow path 115 .

[0066] Guide assembly 140 is located downstream of screw 130 based on the fluid flow direction A. Guide assembly 140 may provide a first flow path 156 and a second flow path 158 through which the fluid passes. In this specification, first flow path 156 may be referred to as bubble formation flow path 156, and second flow path 158 may be referred to as reaction flow path 158. Bubble formation flow path 156 is configured to form bubbles B in the fluid flowing along flow path 156. Reaction flow path 158 is configured to collapse bubbles B contained in the fluid flowing along flow path 158. Based on the fluid flow direction A, first flow path 156 is located upstream of second flow path 158.

[0067] The guide assembly 140 includes a first guide 141 and a second guide 145. The first guide 141 and the second guide 145 are arranged sequentially along the fluid flow direction A. Preferably, the first guide 141 and the second guide 145 are made of a material that is easily triboelectrically negatively charged, that is, a material that can triboelectrically positively charge the fluid. For example, the first guide 141 and the second guide 145 can be made of a synthetic resin material such as acrylic acid, engineering plastics, or various dielectric materials.

[0068] The first guide 141 can be arranged to contact or be adjacent to the screw 130 so as to guide the fluid passing through the screw 130. The first guide 141 includes a focusing flow path 142 and an inlet flow path 143. The focusing flow path 142 is formed in a manner such that its diameter gradually decreases along the flow direction A of the fluid. The focusing flow path 142 can guide the fluid passing through the screw 130 to the inlet flow path 143. In other words, the fluid can flow along the focusing flow path 142 and be concentrated in the inlet flow path 143. The inlet flow path 143 is connected to the focusing flow path 142 so that the fluid can flow in from the focusing flow path 142. The inlet flow path 143 is narrower than the focusing flow path 142, thereby increasing the flow rate of the fluid and enhancing the friction charging effect. At the connection between the focusing flow path 142 and the inlet flow path 143, the diameter of the focusing flow path 142 and the diameter of the inlet flow path 143 are the same.

[0069] The first guide 141 can provide a first flow path 156. That is, the focusing flow path 142 and the inlet flow path 143 of the first guide 141 form the first flow path 156 together with the inlet flow path 115 that accommodates the screw 130. When the fluid flows in the first flow path 156, vortices may be generated and the fluid may be positively charged due to friction with the screw 130 and the first guide 141. In this case, the screw 130 and the first guide 141 may be negatively charged. In addition, when the fluid passes through the first flow path 156, tiny bubbles B are generated in the fluid due to the cavity phenomenon. When the fluid is positively charged, negative charges are concentrated at the interface of the bubbles B in the fluid.

[0070] When the fluid passes through the first flow path 156, a large number of bubbles B are generated in the fluid, but the region where the bubbles B are generated in the fluid is not limited to the first flow path 156. That is, even when the fluid passes through the second flow path 158, bubbles B may be generated in the fluid.

[0071] The second guide 145 may be provided in contact with or adjacent to the first guide 141 to guide the fluid passing through the first guide 141. The second guide 145 has an expansion flow path 146, a contraction flow path 147, and a connection flow path 148.

[0072] Expansion channel 146 is connected to inlet channel 143 of first guide 141. Fluid passing through inlet channel 143 flows into expansion channel 146. The diameter of expansion channel 146 is larger than the diameter of inlet channel 143. Fluid passing through narrow inlet channel 143 flows into expansion channel 146, where its pressure decreases, allowing bubbles B in the fluid to expand in expansion channel 146.

[0073] Reduction flow path 147 is connected to expansion flow path 146. The diameter of reduction flow path 147 is smaller than that of expansion flow path 146. Therefore, when the fluid passing through expansion flow path 146 flows into reduction flow path 147, the pressure increases, and bubbles B in the fluid can be reduced in reduction flow path 147. Connection flow path 148 connects reduction flow path 147 and exhaust flow path 113.

[0074] The connecting flow path 148 is connected to the reducing flow path 147. The connecting flow path 148 is formed in a shape in which its diameter gradually increases along the flow direction A of the fluid. The diameter of the portion of the connecting flow path 148 connected to the reducing flow path 147 is the same as the diameter of the reducing flow path 147, while the diameter of the portion of the connecting flow path 148 connected to the discharge flow path 113 is larger than the diameter of the reducing flow path 147. In addition, the diameter of the portion of the connecting flow path 148 connected to the discharge flow path 113 is smaller than the diameter of the discharge flow path 113. The connecting flow path 148 is formed in a shape in which its diameter gradually increases from the reducing flow path 147 to the discharge flow path 113, so that the fluid passing through the reducing flow path 147 can be discharged to the discharge flow path 113 more smoothly.

[0075] like Figure 6 As shown, the expanded inclination angle α of the connecting flow path 148 is preferably greater than 0 degrees and less than 80 degrees. In this specification, the expanded inclination angle α of the connecting flow path 148 can be defined as the half angle of the expanded angle β of the connecting flow path 148. Furthermore, the expanded inclination angle α of the connecting flow path 148 can be defined as the inclination angle between the inclined surface 150 provided on the inner surface of the second guide 145 and the centerline C of the connecting flow path 148. The inclined surface 150 of the second guide 145 is a portion of the inner surface of the second guide 145 and defines the perimeter of the connecting flow path 148.

[0076] When the expanded inclination angle α of the connecting flow path 148 exceeds 80 degrees, the flow rate of the fluid flowing into the discharge flow path 113 through the connecting flow path 148 may be excessively reduced, which is not desirable.

[0077] The second guide 145 is provided with an inclined portion 152 corresponding to the contact portion 122 of the outer body 110. The inclined portion 152 is arranged on the outer surface of the second guide 145 in a shape with an outer diameter that gradually decreases along the fluid flow direction A. A first inclined portion connecting portion 152a and a second inclined portion connecting portion 152b are respectively provided at each end of the inclined portion 152. The first inclined portion connecting portion 152a is positioned upstream of the second inclined portion connecting portion 152b in the fluid flow direction A. The first inclined portion connecting portion 152a can be formed as a convex curved surface with a constant radius of curvature. The second inclined portion connecting portion 152b can be formed as a concave curved surface with a constant radius of curvature. For example, the first inclined portion connecting portion 152a can be formed as a curved surface with a first radius of curvature, like the first contact portion connecting portion 122a of the contact portion 122, while the second inclined portion connecting portion 152b can be formed as a curved surface with a second radius of curvature, like the second contact portion connecting portion 122b of the contact portion 122. Since the first inclined portion connecting portion 152a has the same curvature radius as the first contact portion connecting portion 122a, the first inclined portion connecting portion 152a can stably contact the first contact portion connecting portion 122a. In addition, since the curvature radius of the second inclined portion connecting portion 152b is the same as the curvature radius of the second contact portion connecting portion 122b, the second inclined portion connecting portion 152b can stably contact the second contact portion connecting portion 122b.

[0078] The curvature radius of the first inclined portion connecting portion 152a or the second inclined portion connecting portion 152b may be changed in various manners depending on the curvature radius of the first contact portion connecting portion 122a or the second contact portion connecting portion 122b.

[0079] A curved, rounded portion 154 is provided around the distal edge of the second guide 145, adjacent to the expansion portion 120 of the outer body 110. When the distal end of the guide assembly 140 has a sharp corner, the problem of charge concentration at that corner may arise. Therefore, by providing the rounded portion 154 around the distal edge of the second guide 145, the problem of charge concentration at the distal end of the second guide 145 or the problem of damage or breakage of the second guide 145 due to charge concentration can be reduced.

[0080] Preferably, the radius of curvature of the circular portion 154 is 0.5 mm to 5 mm. When the radius of curvature of the circular portion 154 is less than 0.5 mm, the effect of preventing charge concentration is not significant, which is undesirable. At the same time, when the radius of curvature of the circular portion 154 exceeds 5 mm, a narrow gap is formed between the outer body 110 and the second guide 145, and the fluid passing through the second guide 145 may flow back into the gap. Due to this backflow, the flow of the fluid through the second guide 145 is likely to become uneven and unstable.

[0081] The radius of curvature of the circular portion 154 is not limited to the above-mentioned size. That is, the radius of curvature of the circular portion 154 can be changed to varying degrees according to the diameter of the second guide 145 or the shape of the expansion portion 120 of the outer body 110.

[0082] refer to Figure 2 and Figure 3 Second guide 145 can provide a second flow path 158 with an expanded diameter at least in certain sections, allowing for rapid pressure changes in the fluid. Specifically, the expansion path 146 and contraction path 147 of second guide 145 constitute second flow path 158. Expansion path 146 forms a diameter-expanded section within second flow path 158. As the fluid passes through second flow path 158, the fluid's pressure rapidly changes, potentially causing bubbles B within the fluid to collapse.

[0083] When tiny bubbles B, with a high negative charge density at the interface, collapse in large numbers within a positively charged fluid, they generate high-temperature (e.g., 12,000 to 14,000 K) and high-pressure (e.g., 3,200,000 bar) plasma. Furthermore, the plasma generated within the fluid can cause the fluid to ionize or decompose. In other words, the materials that make up the fluid can be chemically decomposed by the plasma generated within the fluid.

[0084] When the fluid passes through the second flow path 158, the bubbles B in the fluid collapse in large quantities, but the area where the bubbles B collapse is not limited to the second flow path 158. In other words, the collapse of the bubbles B may occur in at least a portion of the first flow path 156 or a portion of the exhaust flow path 113.

[0085] The fluid processing process of the fluid processing apparatus 100 according to one embodiment of the present disclosure will be described in more detail below.

[0086] When the high-pressure fluid is supplied from the fluid supply device 10 , the high-pressure fluid first passes through the first flow path 156 , ie, the bubble formation flow path 156 .

[0087] Specifically, the fluid first passes through screw 130. The fluid rapidly flows along blades 131 of screw 130, generating vortices. In this case, the rapid change in fluid pressure creates a cavity, which results in the formation of tiny bubbles B in the fluid. While generating vortices, the fluid passing through screw 130 sequentially passes through focusing flow path 142 and inlet flow path 143 of first guide 141. In this case, the fluid acquires positive charges due to friction, and negative charges accumulate at the interface of bubbles B in the fluid.

[0088] In this way, the fluid that generates the bubbles B when passing through the bubble formation flow path 156 flows into the second flow path 158, that is, the reaction flow path 158, and causes a rapid change in pressure while flowing.

[0089] Specifically, the fluid passing through bubble formation flow path 156 first flows into expansion flow path 146, causing the pressure to drop rapidly. In expansion flow path 146, bubbles B in the fluid may expand. Subsequently, the fluid passing through expansion flow path 146 flows into contraction flow path 147, causing the pressure to rise rapidly. In contraction flow path 147, bubbles B in the fluid may shrink.

[0090] In this way, the fluid sequentially passes through expansion path 146 and contraction path 147, forming reaction path 158, resulting in rapid pressure changes. Consequently, bubbles B in the fluid undergo expansion and contraction as they pass through reaction path 158, collapsing in large quantities. This collapse of bubbles B then generates plasma due to the discharge of positive and negative charges within the fluid. In this case, plasma, accompanied by light, high heat, and high pressure, can ionize or decompose the fluid.

[0091] In this way, the fluid processed by plasma can flow into the exhaust flow path 113 through the connecting flow path 148 , and then flow into the fluid storage device 20 from the exhaust flow path 113 .

[0092] When the fluid treatment apparatus 100 according to one embodiment of the present disclosure receives water from the fluid supply apparatus 10 , the fluid treatment apparatus 100 may treat the water into plasma-activated water.

[0093] Specifically, when high-pressure water is supplied to the fluid treatment device 100, a large number of fine bubbles B are generated in the water by the same principle as described above. When these bubbles B collapse, plasma is generated. In this case, as the ionization or decomposition reaction of water molecules and the bonding reaction of ions proceed in the water, a large number of hydrogen ions (H3O + ) and a large number of hydrogen-oxygen nanobubbles (e.g., with a diameter of 65 nm or less). + ) and a large amount of plasma-activated water containing hydrogen and oxygen nanobubbles can be used as a therapeutic agent, disinfectant, cleaner, etc.

[0094] The water supplied to the fluid treatment device 100 is preferably pre-treated water with low conductivity but high electrical resistance due to the removal of foreign matter, or ultrapure water. Ultrapure water is water with relatively high electrical resistance due to the removal of inorganic matter or dissolved gases. High-resistance water, when passing through the fluid treatment device 100, may result in less charge discharge after triboelectric charging but before plasma generation. Furthermore, high-resistance water causes less charge discharge before plasma generation, thus inducing a stronger plasma and thus more efficiently treating the fluid.

[0095] As described above, the fluid treatment device 100 according to one embodiment of the present disclosure can generate a large number of fine bubbles B with concentrated negative charges at the interface through the cavity phenomenon and frictional charging of the flowing fluid, and cause the bubbles B to collapse in the fluid, thereby ionizing or decomposing the fluid. That is, by causing a large number of fine bubbles B with high negative charge density to collapse at the interface in the fluid, a high-temperature and high-pressure plasma can be generated, thereby ionizing or decomposing the fluid in an electrodeless manner. Here, the electrodeless method may refer to a method of ionizing or decomposing the fluid by utilizing the energy generated when the bubbles B in the fluid collapse, without the need for electrodes for applying electrical energy to the bubbles B in the fluid.

[0096] Therefore, the fluid treatment device 100 according to this embodiment can utilize the cavity phenomenon of the flowing fluid to generate a large number of fine bubbles B, causing a large number of negatively charged fine bubbles B to concentrate and collapse at the interface, and generate plasma through the discharge of charge, thereby chemically decomposing or ionizing the fluid. That is, in a positively charged fluid, by collapsing a large number of high-density negatively charged fine bubbles B at the interface, a high-temperature and high-pressure plasma can be generated, thereby ionizing or decomposing the fluid in an electrodeless manner. Therefore, the fluid can be ionized or decomposed without an external power supply or electrode, and the fluid can be efficiently processed with less energy.

[0097] The specific configuration of the fluid treatment device 100 is not limited to the form described and illustrated above.

[0098] For example, the specific configuration of the guide assembly 140 for providing the bubble formation flow path 156 and the reaction flow path 158 may vary.

[0099] As another embodiment, the first guide 141 may be manufactured in a separate form, wherein one guide forms the focusing flow path 142 and the other guide forms the inlet flow path 143 .

[0100] As another embodiment, the second guide 145 may be manufactured in separate forms, wherein one guide forms the narrowing flow path 147 and the other guide forms the connecting flow path 148 .

[0101] As another embodiment, the guide assembly 140 may be manufactured as an integral part of the first guide 141 and the second guide 145 .

[0102] As another embodiment, the guide assembly 140 may be manufactured as an integral part of the outer body 110. In this case, the outer body 110 may be formed in such a manner that a through hole having a reduced diameter portion and an increased diameter portion is formed within a single insulating material.

[0103] Furthermore, the bubble forming flow path 156 may be changed to a shape other than the illustrated shape in which the diameter is reduced at least in a portion along the flow direction of the fluid so as to form bubbles in the flowing fluid.

[0104] Furthermore, the reaction channel 158 may be changed to a shape other than the illustrated shape, which is configured to collapse bubbles contained in the fluid.

[0105] In addition, the screw 130 may be omitted.

[0106] at the same time, Figure 7 A second guide according to another embodiment is shown.

[0107] Figure 7 The second guide 180 shown in FIG has an expansion flow path 181, a contraction flow path 182, and a connection flow path 183. The expansion flow path 181 and the contraction flow path 182 can provide a reaction flow path for causing a rapid change in fluid pressure to collapse the bubble B in the fluid. The expansion flow path 181 is connected to the first guide (141; see Figure 5 )'s inlet flow path 143 is connected, the reduction flow path 182 is connected to the expansion flow path 181, and the connecting flow path 183 is connected to the reduction flow path 182.

[0108] The connecting flow path 183 is formed in a form in which the diameter gradually increases along the flow direction A of the fluid. The diameter of the portion of the connecting flow path 183 connected to the reduction flow path 182 is the same as the diameter of the reduction flow path 182, while the diameter of the portion connected to the discharge flow path 113 is larger than the diameter of the reduction flow path 182. Preferably, the expansion inclination angle α of the connecting flow path 183 is less than 80 degrees. The expansion inclination angle α of the connecting flow path 183 can be defined as the half angle of the expansion angle β of the connecting flow path 183. In addition, the expansion inclination angle α of the connecting flow path 183 can be defined as the inclination angle of the inclined surface 185 provided on the inner surface of the second guide 180 and the center line C of the connecting flow path 183. The inclined surface 185 of the second guide 180 is a part of the inner surface of the second guide 180, which divides the periphery of the connecting flow path 183.

[0109] When the expanded inclination angle α of the connecting flow path 183 exceeds 80 degrees, the flow rate of the fluid flowing through the connecting flow path 183 into the discharge flow path 113 may be excessively reduced, which is not desirable.

[0110] The second guide 180 is provided with an inclined portion 187 corresponding to the contact portion 122 of the outer body 110. The specific structure of the inclined portion 187 can be the same as the inclined portion 152 of the second guide 145 described above.

[0111] In addition, a curved circular portion 189 is provided around the edge of the distal end of the second guide 180. The specific configuration of the circular portion 189 may be the same as the circular portion 154 of the second guide 145 described above.

[0112] The second guide 180 according to this embodiment is Figure 6 The second guide 145 shown has a larger enlarged inclination angle α of the connecting flow path 183. Therefore, when the length of the second guide 180 manufactured according to this embodiment is Figure 6 When the second guide 145 is the same as the second guide 180, the narrowing flow path 182 of the second guide 180 is smaller than that of the second guide 145. Figure 6 The second guide 145 of the embodiment of the present invention has a narrowing flow path 147 that is longer than the second guide 145. As the length of the narrowing flow path 182 increases, the length of the reaction flow path for collapsing bubbles B in the fluid also increases. As a result, the efficiency of plasma generation due to the collapse of bubbles B in the fluid increases, thereby improving fluid processing efficiency. In other words, the second guide 180 according to this embodiment can improve fluid processing efficiency without increasing the length of the entire fluid processing device 100.

[0113] at the same time, Figure 8 is a cross-sectional view showing a fluid processing device according to another embodiment of the present disclosure, Figure 9 yes Figure 8 A magnified part of the image, Figure 10 yes Figure 8 An isolated view of a portion of the fluid handling device is shown in FIG.

[0114] A fluid processing apparatus 200 according to another embodiment of the present disclosure includes an outer body 110, and a first body 210, a second body 220, a third body 230, and a fourth body 240 housed within the outer body 110. The first body 210 may provide a bubble formation flow path 250 for forming bubbles B in a fluid, while the second body 220 and the fourth body 240 may provide a reaction flow path 252 for collapsing the bubbles B contained in the fluid. The third body 230 may be disposed in the reaction flow path 252 to promote the collapse of the bubbles B contained in the fluid.

[0115] The outer body 110 is formed as a hollow body that can accommodate the first body 210, the second body 220, the third body 230, and the fourth body 240. The outer body 110 is provided with an exhaust flow path 113, into which the fluid flows after passing through the fourth body 240. The exhaust flow path 113 is located downstream of the fourth body 240, based on the flow direction A of the fluid. Furthermore, the outer body 110 is provided with an inlet flow path 115 for accommodating the screw 130 of the first body 210 and an intermediate flow path 116 for accommodating the third body 230. The inlet flow path 115 is provided between the connecting pipe 160 of the first body 210 and the first guide 141, and the intermediate flow path 116 is provided between the second body 220 and the fourth body 240.

[0116] In addition, a boss 118 is provided inside the outer body 110 to limit the movement of the fourth body 240. The boss 118 includes an expansion portion 120 and a contact portion 122.

[0117] The specific configuration of the outer body 110 is as described above.

[0118] The first body 210 includes a screw 130 and a first guide 141 .

[0119] The screw 130 is disposed upstream of the first guide 141 based on the flow direction A of the fluid, and can cause the fluid to rotate and flow toward the first guide 141. The screw 130 has blades 131 for generating a vortex in the fluid.

[0120] The first guide 141 includes a focusing flow path 142 and an inlet flow path 143. The focusing flow path 142 and the inlet flow path 143 may form a first fluid flow path 211 having a shape in which the diameter thereof decreases at least partially along the flow direction A of the fluid.

[0121] The screw 130 and the first guide 141 are as described above.

[0122] The second body 220 can be disposed in contact with or adjacent to the first guide 141 so that the fluid passing through the first guide 141 flows into the second body 220. The second body 220 has a second fluid flow path 221. The fluid passing through the first fluid flow path 211 of the first body 210 flows into the second fluid flow path 221. The diameter of the second fluid flow path 221 is larger than the diameter of the inlet flow path 143. When the fluid flows into the second fluid flow path 221, the pressure of the fluid passing through the narrow inlet flow path 143 decreases, allowing bubbles B in the fluid to expand in the second fluid flow path 221.

[0123] The third body 230 can be disposed in contact with or adjacent to the second body 220 so that the fluid passing through the second body 220 flows into the third body 230. The third body 230 has a third fluid flow path 231. The diameter of the third fluid flow path 231 is smaller than the diameter of the second fluid flow path 221. Therefore, when the fluid flows into the third fluid flow path 231, the pressure of the fluid passing through the second fluid flow path 221 increases, and the bubbles B in the fluid in the third fluid flow path 231 decrease.

[0124] The third body 230 is made of a material with higher conductivity than the first body 210, the second body 220, or the fourth body 240. For example, the third body 230 can be made of metal. The third body 230 can serve as a storage body for storing negative charges. In addition, the third body 230 can also promote the collapse of bubbles B contained in the fluid. That is, the third body 230 can promote the collapse of bubbles B by storing negative charges and applying a repulsive force to the bubbles B at the interface where the negative charges are concentrated. In addition, the third body 230 can also promote the collapse of bubbles B at the interface where the negative charges are concentrated by forming an electric field in the fluid. In addition, the third body 230 can also concentrate the bubbles B at the center of the reaction flow path 252 through the repulsive force, inducing the stable generation of plasma along the center of the reaction flow path 252.

[0125] In this way, the third body 230 has the function of promoting the collapse of the bubble B, and can be named as an accelerator or a metal embedder.

[0126] The fourth body 240 may be disposed in contact with or adjacent to the third body 230 so that fluid passing through the third body 230 may flow into the fourth body 240. The fourth body 240 has a fourth fluid flow path 241 through which the fluid flows toward the exhaust flow path 113.

[0127] The fourth fluid flow path 241 includes a reduction flow path 242 and a connecting flow path 243. The reduction flow path 242 is connected to the third fluid flow path 231 of the third body 230. The diameter of the reduction flow path 242 can be the same as the diameter of the third fluid flow path 231. The connecting flow path 243 is formed in a form in which the diameter gradually increases along the flow direction A of the fluid. The diameter of the portion of the connecting flow path 243 connected to the reduction flow path 242 is equal to the diameter of the reduction flow path 242, and the diameter of the portion connected to the discharge flow path 113 is larger than the diameter of the reduction flow path 242. In addition, the diameter of the portion of the connecting flow path 243 connected to the discharge flow path 113 is smaller than the diameter of the discharge flow path 113. The connecting flow path 243 is formed in a shape that gradually expands from the reduction flow path 242 to the discharge flow path 113, so that the fluid passing through the reduction flow path 242 can be discharged to the discharge flow path 113 more smoothly.

[0128] The inner surface of the fourth body 240 is provided with an inclined surface 244, which is inclined relative to the center line of the connecting flow path 243 to define the periphery of the connecting flow path 243. The connecting flow path 243 can have an expanded inclination angle or expanded angle in the same angular range as the expanded inclination angle α or expanded angle β of the connecting flow path 148 provided in the second guide 145 described above.

[0129] The fourth body 240 is provided with an inclined portion 245 corresponding to the contact portion 122 of the outer body 110. The inclined portion 245 is provided on the outer surface of the fourth body 240 in a shape in which the outer diameter gradually decreases along the flow direction A of the fluid. A first inclined portion connecting portion 245a and a second inclined portion connecting portion 245b are provided at both ends of the inclined portion 245. The first inclined portion connecting portion 245a can be formed as a convex curved surface with a constant radius of curvature. The second inclined portion 245b can be formed as a concave curved surface with a constant radius of curvature. For example, the first inclined portion 245a can be formed as a curved surface with a first radius of curvature, like the first contact portion connecting portion 122a of the contact portion 122, while the second inclined portion 245b can be formed as a curved surface with a second radius of curvature, like the second contact portion connecting portion 122b of the contact portion 122.

[0130] A curved rounded portion 247 is provided around the edge of the distal end of the fourth body 240 adjacent to the expanded portion 120 of the outer body 110. Providing the rounded portion 247 around the distal edge of the fourth body 240 can reduce the problem of charge concentration at the distal end of the fourth body 240 or damage or breakage of the fourth body 240 due to charge concentration.

[0131] Similar to the circular portion 154 of the second guide 145 described above, the circular portion 247 of the fourth body 240 may have a curvature radius of 0.5 mm to 5 mm.

[0132] Next, the fluid processing process of the fluid processing apparatus 200 according to this embodiment will be described in more detail.

[0133] When high pressure fluid is supplied from the fluid supply device (10; see Figure 1 ) is supplied, the high-pressure fluid flowing into the interior of the outer body 110 first passes through the screw 130. The fluid flows rapidly along the blades 131 of the screw 130, generating a vortex. In this case, the rapid change in fluid pressure will produce a cavity phenomenon, which will cause small bubbles B to be generated in the fluid. The fluid passing through the screw 130 passes through the focusing flow path 142 and the inlet flow path 143 of the first guide 141 in sequence while generating a vortex. At this time, the fluid is frictionally charged with positive charges, and negative charges are concentrated on the interface of the bubbles B in the fluid.

[0134] The fluid passing through the first fluid flow path 211 flows into the second fluid flow path 221 of the second body 220, causing the pressure to drop rapidly. Bubbles B in the fluid can expand in the second fluid flow path 221. Subsequently, the fluid passing through the second fluid flow path 221 flows into the third fluid flow path 231 of the third body 230 and the shrinking flow path 242 of the fourth body 240, causing the pressure to rise rapidly.

[0135] As a result, the fluids passing through the second fluid flow path 221, the third fluid flow path 231, and the fourth fluid flow path 241 experience rapid pressure changes, causing the bubbles B in the fluids to expand and contract, collapsing in large quantities. In this case, the third body 230 exerts a repulsive force on the bubbles B in the fluid, promoting their collapse. When the bubbles B in the fluid collapse in large quantities, plasma is generated in the fluid, which can ionize or decompose the fluid.

[0136] Although the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not necessarily limited to these embodiments, and various modifications can be made without departing from the scope of the technical ideas of the present disclosure. Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical ideas of the present disclosure, but to explain the technical ideas of the present disclosure, and the scope of the technical ideas of the present disclosure is not limited by these embodiments. Therefore, the above embodiments should be understood as illustrative rather than limiting in all aspects. All technical ideas within the scope equivalent to them should be interpreted as included in the scope of rights of the present disclosure.

Claims

1. A fluid processing device, comprising: a hollow outer body; a guide assembly housed in the outer body to provide a first flow path and a second flow path, wherein the first flow path is shaped such that at least a portion thereof has a smaller diameter along a flow direction of the fluid, and the second flow path is shaped such that at least a portion thereof has a larger diameter so that bubbles contained in the fluid collapse after passing through the first flow path; as well as positioning a screw housed in the outer body upstream of the guide assembly based on the flow direction of the fluid to generate a vortex of the fluid, The inner surface of the outer body includes an expansion portion, the diameter of which gradually increases in a direction away from the distal end of the guide assembly. 2 . The fluid treatment device according to claim 1 , wherein the expansion portion forms a curved shape. 3 . The fluid treatment device according to claim 1 , wherein a first expansion part connecting portion and a second expansion part connecting portion having a curved shape are respectively provided on both end portions of the expansion part. 4 . The fluid treatment device according to claim 1 , wherein a curved rounded portion is provided around an edge of a distal end of the guide member adjacent to the expansion portion. 5 . The fluid handling device according to claim 4 , wherein the rounded portion is configured as a curved surface having a curvature radius of 0.5 mm to 5 mm.

6. The fluid treatment device according to claim 1, wherein the guide assembly comprises an inclined portion whose outer diameter gradually decreases along the flow direction of the fluid, and The outer body includes a contact portion protruding from the inner surface of the outer body, which contacts the inclined portion to restrict movement of the guide assembly so as not to move in the flow direction of the fluid. 7 . The fluid processing device according to claim 6 , wherein the contact portion is shaped so that an inner diameter thereof gradually decreases along the flow direction of the fluid so as to contact the inclined portion.

8. The fluid treatment device according to claim 6, wherein a first inclined portion connecting portion having a convex curved surface with a first curvature radius is provided at one end portion of the inclined portion, and a second inclined portion connecting portion having a concave curved surface with a second curvature radius is provided at the other end portion of the inclined portion, and A first contact portion connecting portion having a concave curved surface with the first curvature radius is provided at one end portion of the contact portion to contact the first inclined portion connecting portion, and a second contact portion connecting portion having a convex curved surface with the second curvature radius is provided at the other end portion of the contact portion. 9 . The fluid treatment device according to claim 8 , wherein the first radius of curvature is 1 mm to 20 mm.

10. The fluid processing device according to claim 1, wherein the first flow path comprises a focusing flow path into which the fluid passing through the screw is introduced and whose diameter gradually decreases along the flow direction of the fluid, and An inlet flow path is connected to the distal end of the focusing flow path so that the fluid is introduced from the focusing flow path and has a diameter equal to the diameter of the distal end of the focusing flow path.

11. The fluid processing device according to claim 10, wherein the second flow path comprises an expansion flow path connected to the inlet flow path so that the fluid is introduced from the inlet flow path, the expansion flow path having a diameter larger than the diameter of the inlet flow path, and A reduction flow path connected to the expansion flow path so that the fluid is introduced from the expansion flow path, the reduction flow path having a diameter smaller than the diameter of the expansion flow path.

12. The fluid processing device according to claim 1 , wherein the guide assembly comprises a connecting flow path connected to the first flow path so that the fluid passing through the first flow path is introduced, and a diameter thereof gradually expands along the flow direction of the fluid, The outer body has a discharge flow path provided therein, the discharge flow path being connected to the connecting flow path so that the fluid passing through the connecting flow path is introduced and having a diameter larger than the diameters of the expansion flow path and the connecting flow path. 13 . The fluid treatment device according to claim 12 , wherein the expansion inclination angle of the connecting flow path is greater than 0 degrees and less than 80 degrees.

14. The fluid treatment device according to claim 1, wherein the guide assembly is made of a material that causes the fluid to be tribo-positively charged. 15 . The fluid processing device of claim 1 , further comprising an accelerator housed in the outer body and facilitating collapse of bubbles contained in the fluid.

16. The fluid processing device according to claim 15, wherein the accelerator is formed in the shape of a metal ring.

17. A fluid processing device comprising: a hollow outer body; a first body including a screw and a first fluid flow path, the first fluid flow path guiding the flow of a fluid passing through the screw and having a shape in which at least a portion thereof along a flow direction of the fluid decreases in diameter, the first body being accommodated in the outer body; a second body connected to the first body and comprising a second fluid path having a diameter relatively larger than one end of the first fluid path so as to provide a pressure change for the fluid passing through the first fluid path; as well as a third body including a third fluid path, the third body being connected to the second body, being formed of a material having a higher electrical conductivity than the second body, and having a third fluid path having a relatively smaller diameter than the second fluid path, so as to provide a pressure change to the fluid passing through the second fluid path; Herein, an expansion portion located downstream of the third body based on the flow direction of the fluid and having a shape with a gradually expanding diameter is provided on the inner surface of the outer body.

18. The fluid processing device according to claim 17, further comprising a fourth body connected to the third body, the fourth body having a fourth fluid path, the fluid passing through the third fluid path being introduced into the fourth fluid path, A curved rounded portion is provided around an edge of a distal end of the fourth body adjacent to the expansion portion. 19 . The fluid treatment device of claim 18 , wherein the rounded portion is configured in a curved shape with a curvature radius of 0.5 mm to 5 mm.

20. The fluid processing device according to claim 17, further comprising a fourth body connected to the third body, the fourth body having a fourth fluid path, the fluid passing through the third fluid path being introduced into the fourth fluid path, wherein at least a portion of the fourth fluid flow path is formed into a shape whose diameter gradually increases along the flow direction of the fluid, The expansion inclination angle of the expansion portion of the fourth fluid path is greater than 0 degrees and less than 80 degrees.

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