JP5103625B2 - Fluid mixer and fluid mixing method - Google Patents

Description

  The present invention relates to a fluid mixer suitable for mixing two or more fluids to generate a fine fluid droplet group (for example, microbubble, nanobubble, mist, dry mist, emulsion, etc.) or a solid flight group, and The present invention relates to a fluid mixing method.

As a conventional microbubble generator, for example, a sphere is arranged inside a pipe and a small hole is provided on the downstream side (see, for example, Patent Document 1). When high-pressure water is introduced into the sphere, the water pressure is lowered downstream of the sphere to generate a negative pressure, and air is sucked from the small holes to generate microbubbles. Further, there has been disclosed a structure in which a throttle is arranged inside a pipe and a porous tube is provided on the downstream side instead of a small hole (for example, see Patent Document 2).
JP 2003-305494 A Japanese Utility Model Publication No. 04-45552

  However, in Patent Document 1, the number of small holes is limited, and in Patent Document 2, since the porous tube is thick and the air suction amount is insufficient for the degree of the negative pressure, both generate micro bubbles. There is a limit to the amount, and it has been desired to generate a large amount of microbubbles by sucking a larger amount of gas. Furthermore, not only microbubbles but also mists, dry mists, and emulsions can be generated with the same apparatus, and in addition, it is desired to be able to simultaneously suck and mix a plurality of different fluids.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a fluid mixer capable of automatically sucking a larger amount of fluid and mixing it with another fluid, and a fluid mixing method using the fluid mixer. It is to provide.

The fluid mixer according to the invention, a tube of pressurized fluid from one end of the long side direction is supplied, an orifice having a smaller opening diameter than the inner diameter of the disposed pipe body Rutotomoni the pipe body, O Provided inside the tube on the downstream side of the reface, having the same inner diameter as the tube and having a thickness of 2 mm or less, a fluid suction tube made of a porous material or a porous membrane, and provided outside the fluid suction tube And a fluid chamber. Here, the “porous membrane” refers to a membrane having a large number of small holes, and the small holes are formed by, for example, etching or pressing.

In the fluid mixer according to the present invention, when a pressurized fluid is supplied into the pipe body, the pressure of the fluid rapidly decreases on the downstream side of the orifice, and a negative pressure is generated. As a result, the fluid is sucked into the tube through the fluid suction tube made of the porous material or the porous membrane, and mixed with the pressurized fluid. At that time, since the fluid suction tube has the same inner diameter as the tube body, the degree of negative pressure on the downstream side of the orifice increases and the thickness of the fluid suction tube is as thin as 2 mm or less. Becomes smaller. Therefore, a larger amount of fluid is sucked into the tube.

  On the downstream side of the orifice, the pressurized fluid and the fluid automatically sucked by the fluid suction pipe may be mixed to generate a fine fluid droplet group or a solid flying group. The "fluid droplet group" here means not only microbubbles or nanobubbles in which a gas is encased in a liquid film, but also emulsions (fine droplets that do not dissolve in the surrounding liquid), or mist or dry mist (mist-like). Droplets). Microbubbles have a particle size of about 10 μm to 500 μm, and nanobubbles have a particle size of about 0.1 μm to 10 μm. The mist refers to a droplet having a particle size of about 30 μm to 500 μm, and the dry mist refers to a droplet having a particle size of about 1 μm to 30 μm.

  That is, when a high-pressure liquid is supplied as a pressurized fluid, microbubbles or nanobubbles are generated if gas is sucked through the fluid suction tube, and an emulsion is generated if liquid that does not dissolve in the surrounding liquid is sucked. If the gas and the liquid that does not dissolve in the surrounding liquid are sucked, microbubbles or nanobubbles and an emulsion are generated simultaneously.

  On the other hand, when high-pressure gas is supplied as a pressurized fluid, if liquid or gas is sucked through the fluid suction pipe, they are mixed and mixed in the air flow, and if only liquid is sucked, mist or dry Mist is generated.

  Furthermore, the pressurized liquid and the sucked liquid react to generate a gas droplet group or a solid flight group, or the pressurized gas and the sucked gas react to react with the liquid. It is also possible to generate a splash group.

  In this fluid mixer, the fluid chamber preferably has a plurality of chambers isolated from each other. This is because by supplying different fluids to at least two of the plurality of chambers, these fluids can be sucked into the tubular body via the fluid suction tube, and a plurality of types of fluids can be mixed.

  Furthermore, this fluid mixer preferably includes a pipe that leads to the fluid chamber and a flow rate adjustment valve provided in the pipe. This is because the flow rate or particle size of the fluid droplet group can be adjusted by the opening of the flow rate adjustment valve.

  It is preferable that the fluid chamber is provided around the tube body and the fluid suction tube. Moreover, it is preferable that the pipe body and the fluid suction pipe are circular pipes, and the fluid chamber is annular.

  It is preferable that the end portion on the downstream side of the through hole of the tube body has a shape in which the cross-sectional area in the tube becomes wider as it is closer to the outlet. This is because diffusion of the generated fluid droplet group can be improved.

In the fluid mixing method according to the present invention , an orifice having an opening diameter smaller than the inner diameter of the tube body is disposed in the passage of the tube body having a fluid passage, and the tube body is disposed inside the tube body on the downstream side of the orifice. A fluid suction pipe made of a porous material or a porous membrane is provided, the pressurized fluid is supplied into the passage of the tubular body, and the pressure of the fluid is reduced downstream of the orifice . The pressure is rapidly reduced on the side to generate a negative pressure, and the pressurized fluid and the sucked fluid are mixed by sucking the fluid through the fluid suction pipe.

  Further, the pressurized fluid and the sucked fluid may be mixed to generate a fine fluid droplet group or a solid flight group.

  Alternatively, the pressurized fluid and the plurality of types of fluids may be mixed by sucking a plurality of types of fluid through the fluid suction pipe. At that time, as a plurality of types of fluids, for example, if the fluid for refining the fluid droplet group and the cleaning liquid are sucked, a finer fluid droplet group can be generated and the cleaning effect is enhanced. be able to.

According to the fluid mixer of the present invention, the opening diameter of the orifice is made smaller than the inner diameter of the tubular body, and the fluid suction pipe has the same inner diameter as the tubular body. In addition to being able to increase the thickness, the thickness of the fluid suction tube is reduced to 2 mm or less, so that the resistance to fluid suction can be reduced. Therefore, a larger amount of fluid can be sucked into the tube and mixed with the pressurized fluid.

  Moreover, according to the fluid mixing method of the present invention, a large amount of fluid can be sucked and mixed. Therefore, various applications such as water purification, cleaning, cooling, or fire extinguishing are possible by appropriately selecting the fluid. Further, it is also possible to generate a gas droplet group or a solid flight group from a liquid, or a liquid droplet group from a gas.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 shows the overall configuration of a fluid mixer according to a first embodiment of the present invention. The fluid mixing method of the present invention will be described together because it is embodied by the operation of the fluid mixer.

  The fluid mixer 1 is installed in a tank 2 that contains a liquid L such as water, mixes the pressurized fluid F0 and the suction fluid F1, and generates a fluid droplet group S in the liquid L. For example, it can also be used as a foam generator that generates foam cleaning agents such as baths and bathtubs. The pressurized fluid F0 is, for example, a pressurized liquid pressurized by the pressure pump 3. The suction fluid F1 is introduced into the fluid mixer 1 from the pipe 4.

  The pressurizing pump 3 pressurizes the liquid L (for example, water) in the tank 2 and supplies it to the fluid mixer 1 as a pressurized fluid F0 (for example, high-pressure water). The pressurizing pump 3 may pressurize a liquid in a tank (not shown) different from the tank 2 and supply it to the fluid mixer 1. Further, the pressurizing pump 3 may be omitted, and tap water may be supplied as the pressurized fluid F0. The pressurizing pump 3 may be a submersible pump.

  One end of the pipe 4 communicates with a fluid chamber 40 which will be described later, and the suction fluid F1 can be sucked into the fluid mixer 1 from the other end. Specifically, the other end of the pipe 4 is opened to the atmosphere, for example, and the suction fluid F1 is a gas, for example, air. The pipe 4 is preferably provided with a flow control valve 5. This is because the flow rate or particle size of the fluid droplet group S can be adjusted by the opening degree of the flow rate adjusting valve 5.

  2 and 3 show a cross-sectional configuration of the main part of the fluid mixer 1 shown in FIG. The fluid mixer 1 has a configuration in which, for example, an orifice 20 is disposed inside a tube body 10. The tubular body 10 is divided into an upstream first region 10A and a downstream second region 10B along the longitudinal direction with the orifice 20 as a boundary position. The fluid suction tube 30 and the downstream second region 10B A fluid chamber 40 is provided.

  The pipe body 10 is a circular pipe made of, for example, a plastic such as polyethylene, polypropylene, polyvinyl chloride or polyamide, or a metal such as stainless steel or brass, and the above-described pressurization is applied to the first region 10A on the upstream side. The fluid F0 is supplied, and the suction fluid F1 is sucked in the second region 10B on the downstream side to generate a fluid droplet group S. The end of the tube body 10 on the first region 10A side is a supply port for the pressurized fluid F0, to which the above-described pressurizing pump 3 or an external water pipe or the like (not shown) is connected. Note that a fluid pressure measuring tap (not shown) may be provided in the first region 10A.

  The end on the second region 10B side is an outlet 10C for discharging the fluid droplet group S. It is preferable that the end part on the second region 10B side has a taper shape that spreads toward the end so that the cross-sectional area in the pipe becomes wider as the outlet 10C is closer. This is because diffusion of the generated fluid droplet group S can be improved. For reasons such as workability or use, a straight pipe having a constant cross-sectional area or a tapered shape in which the cross-sectional area in the pipe becomes narrower as it is closer to the outlet 10C may be used.

  The flow rate Q of the pressurized fluid F0 is, for example, preferably 10 l / min or more and 80 l / min or less when the inner diameter of the circular pipe is around 11 mm, and {(inner diameter) mm / 11 mm when the inner diameter of the circular pipe is different. } Is preferably increased or decreased in proportion to the square of the ratio.

  The orifice 20 is for abruptly reducing the pressure of the pressurized fluid F0 to generate a negative pressure in the second region 10B. By adopting the orifice 20, the fluid mixer 1 has a simpler structure and can be easily manufactured at a lower cost than the spherical negative pressure generator disposed in the pipe as described in Patent Document 1. It is possible and has excellent practicality and spread.

  The ratio of the opening diameter of the orifice 20 to the inner diameter of the tube body 10 is preferably 0.3 to 0.7, for example. This is because the magnitude of the negative pressure can be adjusted, and the flow rate of the suction fluid F1 and the size of the fluid droplet group S can be changed.

  The fluid suction tube 30 is for supplying the above-described suction fluid F1 to the inside of the tube body 10, and has the same inner diameter as the tube body 10 and has a thickness of 2 mm or less. Thereby, in this fluid mixer, a larger amount of suction fluid F1 can be sucked and mixed with the pressurized fluid F0.

  Since the fluid suction tube 30 has the same inner diameter as the tube body 10, the ratio of the opening diameter of the orifice 20 to the inner diameter of the fluid suction tube 30 is, for example, 0.3 to 0.7 as in the case of the tube body 10. . Thereby, the downstream side of the orifice 20 can be expanded rapidly, and the degree of negative pressure in the second region 10B can be increased.

  The reason why the thickness of the fluid suction tube 30 is set to 2 mm or less is that the flow resistance when passing through the fluid suction tube 30 increases with the thickness.

  The fluid suction pipe 30 is a circular pipe made of a plastic such as polyethylene or polypropylene, a metal such as stainless steel or brass, a porous material such as ceramics or glass, or a porous film. Here, the “porous membrane” refers to a membrane having a large number of small holes, and the small holes are formed by, for example, etching or pressing. The pore diameter of the porous material or the small pore diameter of the porous membrane can be changed according to the application, and thereby the flow rate and particle diameter of the fluid droplet group S can be controlled.

  The connection structure of the fluid suction tube 30 and the tube body 10 is not particularly limited. For example, a step-shaped recess 11 is provided on the inner wall surface of the tube 10, and the fluid suction tube 30 is locked by the recess 11. Can be.

  The fluid chamber 40 is for smoothly sucking the suction fluid F1 into the tube body 10 through the liquid suction tube 30. The fluid chamber 40 makes a circle around the tube body 10 and the fluid suction tube 30. Is provided. Although the specific configuration of the fluid chamber 40 is not particularly limited, for example, a gap that goes around the tube body 10 is provided between the first region 10A and the second region 10B of the tube body 10, and the gap A fluid suction tube 30 is provided at an end in the tube body 10, the outside of the gap is closed with a sealing member 41, and an annular space between the fluid suction tube 30 and the sealing member 41 becomes a fluid chamber 40. ing. In addition, although it does not specifically limit about the constituent material of the sealing member 41, For example, it can comprise with the material similar to the tubular body 10. It is preferable to provide an airtight O-ring 42 between the sealing member 41 and the tube body 10. This is because disassembly is facilitated and can be easily replaced when the fluid suction pipe 30 is clogged. However, the sealing member 41 may be directly joined to the tubular body 10 by an adhesive or welding.

  The fluid chamber 40 communicates with the pipe 4 described above via a suction port 43 for sucking the suction fluid F1. The suction port 43 is preferably provided with a suction valve (not shown). This is because the size or flow rate of the generated fluid droplet group S can be changed by adjusting the opening of the suction valve.

  This fluid mixer 1 can be manufactured as follows, for example.

  First, the first region 10A and the second region 10B of the tube body 10 and the sealing member 41 are formed by melting or extruding the above-mentioned plastic and extruding it into a tube shape, or a metal tube such as stainless steel Prepare a circular tube cut into a suitable length. These circular pipes are provided with a stepped recess 11 for locking the fluid suction pipe 30.

  Next, the fluid suction pipe 30 and the orifice 20 made of the porous circular pipe described above are prepared, and the fluid suction layer 30 and the orifice 20 are arranged in the gap between the first region 10A and the second region 10B of the tube body 10, Locked by the recess 11.

  Subsequently, the sealing member 41 is detachably fixed outside the gap with the O-ring 42 interposed therebetween, or is fixed to the tube body 10 by an adhesive or welding. Thereby, an annular fluid chamber 40 is formed between the fluid suction pipe 30 and the sealing member 41. Finally, a suction port 43 is provided in the fluid chamber 40 to communicate with the pipe 4, and the pressurizing pump 3 is connected to the end of the tubular body 10 on the first region 10 </ b> A side. Thereby, the fluid mixer 1 shown in FIGS. 1 to 3 is completed.

  In this fluid mixer 1, when the pressurized fluid F0 is guided to the tube body 10, since the flow path is narrow around the orifice 20, it becomes a high shear flow and the static pressure P on the second region 10B side is an energy conservation type (Bernoulli type). ) To be low. This static pressure P becomes equal to or lower than atmospheric pressure (negative pressure) when the flow rate of the pressurized fluid F0 increases to some extent. As a result, the suction fluid F1 is automatically sucked (self-sucked) into the tube body 10 through the pipe 4, the fluid chamber 40, and the fluid suction pipe 30 made of a porous material or a porous film in order. The sucked suction fluid F1 is sheared by a high shear flow, mixed with the pressurized fluid F0, and discharged as a fluid droplet group S.

  Here, since the fluid suction tube 30 has the same inner diameter as the tube body 10, the degree of negative pressure in the second region 10B on the downstream side of the orifice 20 is increased, and the thickness of the fluid suction tube 30 is 2 mm or less. Therefore, the resistance to suction of the suction fluid F1 is reduced. Therefore, a larger amount of the suction fluid F1 is sucked into the tube body 10, and the suction fluid F1 is sheared by the high-speed circulation vortex Vx generated behind the orifice 20 and mixed with the pressurized fluid F0. A large amount of S is generated.

  At this time, for example, if a cleaning liquid is added to the pressurized fluid F0, effective cleaning is performed by the cleaning action of the cleaning liquid and the adhesion action of dirt on the fluid droplet group S. Further, the surface tension is reduced by the introduction of the cleaning liquid, the size of the fluid droplet group S is further reduced, and the effect of attaching dirt to the fluid droplet group S is increased.

  Thus, in the present embodiment, since the fluid suction pipe 30 has the same inner diameter as the pipe body 10, the degree of negative pressure in the second region 10B downstream of the orifice 20 can be increased, Since the thickness of the fluid suction pipe 30 is reduced to 2 mm or less, the resistance to suction of the suction fluid F1 can be reduced. Therefore, a larger amount of suction fluid F1 can be sucked into the tube body 10 and mixed with the pressurized fluid F0, and a large amount of fluid droplet group S can be easily generated.

  Further, since the pressure of the pressurized fluid F0 is suddenly reduced by the orifice 20 to generate the negative pressure in the second region 10B, the spherical negative pressure generator is disposed in the pipe as in the prior art. However, the structure becomes simple and can be easily manufactured at low cost. Therefore, a highly practical fluid droplet group generator can be realized and the possibility of widespread use can be expected.

(Second Embodiment)
4 and 5 show a cross-sectional configuration of the main part of the fluid mixer 1 according to the second embodiment of the present invention. The fluid mixer 1 has the same configuration as that of the first embodiment except that the fluid chamber 40 includes a plurality of (for example, four) chambers 40A, 40B, 40C, and 40D. is doing. Accordingly, the corresponding components will be described with the same reference numerals.

  The chambers 40A to 40D are separated from each other by a partition plate 44 made of, for example, plastic or metal. These chambers 40A to 40D are respectively provided with suction ports 43A to 43D, and pipes 4 (not shown in FIGS. 4 and 5; see FIG. 1) are connected to the suction ports 43A to 43D, respectively. Has been. Thereby, in this fluid mixer 1, by supplying a plurality of types of suction fluids F1 to F4 to the chambers 40A to 40D and simultaneously sucking them through the fluid suction pipe 30, the pressurized fluid F0 and the suction fluids F1 to F4 And the fluid droplet group S can be generated at the same time.

  For example, if sodium bicarbonate water is used as the suction fluid F1, vinegar is used as the suction fluid F2, and air is used as the suction fluids F3 and F4, the fluid droplet group (microbubbles) S of carbon dioxide gas due to the chemical reaction between the suction fluid F1 and the suction fluid F2. Can be generated. At that time, the air of the suction fluids F3 and F4 can contribute to the promotion of mixing.

  Further, for example, if any one of the suction fluids F1 to F4 is a cleaning liquid and the other is air, effective cleaning is performed by the cleaning action of the cleaning liquid and the adhesion of dirt to the fluid droplet group S. Further, the surface tension is reduced by the introduction of the cleaning liquid, the size of the fluid droplet group S is further reduced, and the effect of attaching dirt to the fluid droplet group S is increased.

  Furthermore, for example, if the fluid for refining the fluid droplet group S as the suction fluid F1, the cleaning liquid as the suction fluid F2, and the air as the suction fluids F3 and F4 are sucked, the finer fluid droplet group S is generated. The cleaning effect can be enhanced.

  The pipes 4 connected to the suction ports 43A to 43D are connected to different gas cylinders, liquid tanks, or the like according to the types of the suction fluids F1 to F4, or are opened to the atmosphere.

  The fluid mixer 1 can be manufactured in the same manner as in the first embodiment except that when the fluid chamber 40 is formed, a partition plate 44 is provided to form the chambers 40A to 40D. it can.

  In this fluid mixer 1, when the pressurized fluid F0 is guided to the tube body 10, the static pressure P in the second region 10B on the downstream side of the orifice 20 becomes a negative pressure in the same manner as in the first embodiment. As a result, the suction fluids F1 to F4 are automatically sucked into the tube body 10 through the pipe 4, the fluid chamber 40, and the fluid suction pipe 30 in this order, and are mixed with the pressurized fluid F0 to form the fluid droplet group S. Released as. Here, since the fluid chamber 40 has chambers 40 </ b> A to 40 </ b> D that are isolated from each other, a plurality of different fluids F <b> 1 to F <b> 4 are contained in the tube body 10 through these chambers 40 </ b> A to 40 </ b> D and the fluid suction pipe 30. Simultaneously sucked and mixed at the same time.

  As described above, in the above-described embodiment, the fluid chamber 40 is provided with the plurality of chambers 40A to 40D that are isolated from each other. Therefore, by simultaneously sucking a plurality of types of suction fluids F1 to F4 through the fluid suction pipe 30. The pressurized fluid F0 and the suction fluids F1 to F4 can be mixed simultaneously. Therefore, a multi-fluid mixer capable of mixing multi-fluids simultaneously can be realized.

  In the above embodiment, the case where the partition plate 44 is provided through the fluid chamber 40 and the fluid suction pipe 30 has been described. However, as shown in FIG. It may be provided only in 40.

  In the above embodiment, the case where the fluid chamber 40 circulates around the tubular body 10 and has the partition plate 44 therein is described. However, the chambers 40A to 40D are configured as independent fluid chambers. May be.

  Furthermore, in the above-described embodiment, the case where different suction fluids F1 to F4 are supplied to the chambers 40A to 40D has been described. However, if at least two of the chambers 40A to 40D are supplied with different suction fluids. Good. For example, the suction fluid F1 may be supplied to the chambers 40A and 40C, and another suction fluid F2 may be supplied to the chambers 40B and 40D.

  Although the present invention has been described with reference to the embodiment, the present invention is not limited to the above embodiment and can be variously modified. For example, in the above-described embodiment, the case where the tubular body 10 is a circular pipe has been described. However, the tubular body 10 may generate a negative pressure on the downstream side relative to the shape of the orifice 20. The shape is arbitrary.

  Further, for example, in the above-described embodiment, the configuration of the fluid mixer has been specifically described, but it is not necessary to include all the components, and other components may be further included. For example, in order to improve the ejection characteristics and the suction characteristics, the shapes of the inlet and outlet 10C of the tube body 10 and the fluid suction pipe 30 may be appropriately changed.

  In addition, for example, the type of fluid described in the above embodiment, the flow rate or the generation condition of the fluid droplet group is not limited, and may be another fluid, or may be another flow rate or generation condition. Good. For example, the pressurized fluid F0 and the suction fluid F1 are appropriately selected according to the purpose of use of the fluid mixer, and may be other gases or liquids. For example, as the pressurized fluid F0, air, water vapor, inert gas, or a combustion-supporting gas such as oxygen or ozone, or a combustible gas can be used in addition to the water described in the above embodiment. The suction fluid F1 may be water, a fire-extinguishing liquid, an insecticide, a disinfectant, an air cleaner, a bath agent, a fragrance, a deodorant, or the like, in addition to the air and the cleaning agent described above. If water is used for the pressurized fluid F0 and oil that does not dissolve in water is used for the suction fluid F1, an emulsion can be generated.

  Furthermore, a solid flying group is generated by a chemical reaction between a pressurized liquid and a sucked liquid, or a liquid droplet group is generated by a chemical reaction between a pressurized gas and a sucked gas. It can also be done.

  If this fluid mixer is used for generation of microbubbles or nanobubbles, it is effective for water purification such as reservoirs and dams, or cleaning of electronic parts. Further, if used for generating mist or dry mist, for example, cooling using humidification or heat of vaporization, or extinguishing the indoor oxygen concentration below the combustion range by vaporization of mist, an excellent effect can be obtained. .

  Furthermore, if this fluid mixer is attached to a small pump such as a home bath pump, it can also be used as a handy type jet bath that can apply bubbles and bathing agents to the desired part. An effective warm bathing action and local massage effect can be obtained with cleaning.

It is a figure showing the whole structure of the fluid mixer which concerns on the 1st Embodiment of this invention. It is sectional drawing showing the structure of the fluid mixer shown in FIG. It is sectional drawing along the III-III line of FIG. It is sectional drawing showing the structure of the fluid mixer which concerns on the 2nd Embodiment of this invention. It is sectional drawing along the VV line of FIG. It is sectional drawing showing the modification of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Fluid mixer, 2 ... Tank, 3 ... Pressurization pump, 4 ... Piping, 5 ... Flow control valve, 10 ... Pipe body, 10A ... 1st area | region, 10B ... 2nd area | region, 10C ... Outlet, 20 ... Orifice 30 ... Fluid suction pipe, 40 ... Fluid chamber, 40A-40D ... Chamber, 41 ... Sealing member, 42 ... O-ring, 43, 43A-43D ... Suction port, 44 ... Partition plate, F0 ... Pressurized fluid, F1 ~ F4 ... suction fluid, S ... fluid splash group

Claims (11)

A tubular body to which a pressurized fluid is supplied from one end in the longitudinal direction;
An orifice that is disposed in the tube and has a difference between the inner diameter of the tube on the upstream side and the opening diameter by having an opening diameter smaller than the inner diameter of the tube;
Provided inside the tube body on the downstream side of the orifice and having the same inner diameter as the upstream side of the tube body , there is a difference between the opening diameter and the inner diameter of the fluid suction tube on the downstream side and the thickness. Is a fluid suction pipe made of a porous material or a porous membrane,
And a fluid chamber provided outside the fluid suction pipe. The fine fluid droplet group or solid flight group is generated by mixing the pressurized fluid and the fluid automatically sucked by the fluid suction pipe on the downstream side of the orifice. Item 1. A fluid mixer according to item 1. The fluid mixer according to claim 1, wherein the fluid chamber has a plurality of chambers isolated from each other. The fluid mixer according to any one of claims 1 to 3, further comprising: a pipe communicating with the fluid chamber; and a flow rate adjusting valve provided in the pipe. The fluid mixer according to any one of claims 1 to 4, wherein the fluid chamber is provided around the pipe body and the fluid suction pipe. The fluid mixer according to any one of claims 1 to 5, wherein the tube body and the fluid suction tube are circular tubes, and the fluid chamber is annular. The fluid mixer according to any one of claims 1 to 6, wherein the other end portion of the tube body has a shape in which a cross-sectional area in the tube increases as it is closer to the outlet. An orifice having a difference between the inner diameter of the upstream tubular body and the opening diameter is disposed in the passage of the tubular body having a fluid passage by having an opening diameter smaller than the inner diameter of the tubular body. The inner diameter of the pipe body on the downstream side of the orifice has the same inner diameter as that of the upstream side of the pipe body , so that there is a difference between the opening diameter and the inner diameter of the fluid suction pipe on the downstream side and the thickness. 2 mm or less, a fluid suction pipe made of a porous material or a porous membrane is provided, a pressurized fluid is supplied into the passage of the tubular body, and the pressure of the fluid is rapidly reduced downstream of the orifice. The fluid mixing method is characterized by mixing the pressurized fluid and the suctioned fluid by generating a negative pressure and sucking the fluid through the fluid suction pipe. The fluid mixing method according to claim 8, wherein the pressurized fluid and the sucked fluid are mixed to generate a fine fluid droplet group or a solid flight group. The fluid mixing method according to claim 9, wherein the plurality of types of fluid are mixed by sucking a plurality of types of fluid through the fluid suction pipe. The fluid mixing method according to claim 10, wherein a fluid for miniaturizing a fluid droplet group and a cleaning liquid are sucked as the plurality of types of fluid.

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