JP2011224443A - Spray system using two-fluid nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve miniaturization and simplification of a spray system using a two-fluid nozzle and facilitate operation and maintenance for applying the spraying system especially to beauty and health in a beauty salon and home.SOLUTION: The spray system 1 includes a compressor 2 for supplying a high pressure gas, an attachable/detachable liquid container 3 for storing liquid, and the two-fluid nozzle 4 for mixing the gas and the liquid to spray droplets, and is provided with a gas pipe 10 whose one end side communicates with the compressor 2 and whose other end side is branched through a two-way branch portion 12, one of the branched pipes forming a pipe 13 supplying gas to the nozzle and communicating with the two-fluid nozzle 4, and the other of the branched pipes forming a pipe 14 supplying gas to the container and communicating with the liquid container 3, and a liquid pipe 11 whose one end side faces the bottom in the liquid container 3 and whose other end side communicates with the two-way fluid nozzle 4. The liquid in the liquid container 3 is sent to the two-fluid nozzle 4 through the liquid pipe 11 by the pressure action of the gas supplied from the pipe 14 for supplying gas to the container.

Description

  The present invention relates to a spray system using a two-fluid nozzle, and more particularly to a system for controlling the temperature / humidity of a space by efficient vaporization of extremely fine droplets generated using the two-fluid nozzle and various fields thereof. It relates to the technology applied.

  A two-fluid nozzle with a structure that sprays fine droplets by applying energy from a high-pressure air flow to a liquid such as water has high vaporization properties of the droplets and wets the surroundings during spraying. A so-called dry mist that does not occur can be generated, and a method for controlling the temperature / humidity of a sealed space and a semi-open space has been attempted in various fields of industrial technology by paying attention to such characteristics. For example, sterilization and deodorization in a hospital room or the like using fine droplets (Patent Document 1) has been proposed.

  In a two-fluid type nozzle, when a supplied fluid (for example, water) is ejected from the nozzle tip to the outside, it is sprayed as a droplet having an extremely fine particle size by applying a flow of high-pressure pressurized air. ing. Such a two-fluid nozzle is excellent in that it generates extremely fine droplets with high vaporization efficiency, such as cleaning in a hospital space such as that disclosed in Patent Document 1 and other general interior rooms. Attempts have been made to use a two-fluid nozzle for air conditioning.

  However, when applied to such applications, the two-fluid nozzle requires relatively high-pressure air, so the size of the power source such as an air compressor is increased, the power consumption is increased, the operating cost is increased, and the power is increased. The problem of noise is caused by the increase in the size of the source. In addition, in order to perform more accurate and quick temperature / humidity control at a relatively low pressure, it is required to further reduce the particle size of the droplets and make the distribution uniform to further increase the vaporization efficiency.

  On the other hand, the present applicant has proposed a spray system using a two-fluid nozzle that can achieve both the reduction of liquid particles and the reduction of power consumption of a compressor in Japanese Patent Application No. 2009-202511.

JP 2005-46338 A

  The spray system described in Japanese Patent Application No. 2009-202511 is used for multipurpose applications such as skin care by moisturizing in beauty salons and homes, beauty / health use such as massage, and air purification such as deodorization and sterilization in the later development stage. Also proved to be particularly effective. In these applications, the system must be made smaller, simplified, and easier to operate when used for multiple purposes because of its widespread use.

  The present invention is a spray system having a compressor for supplying high-pressure gas, a detachable liquid container for storing liquid, and a two-fluid nozzle for mixing gas and liquid to spray droplets, One end side leads to a compressor, the other end side branches by a bifurcated branch part, one of which constitutes a nozzle supply gas pipe leading to a two-fluid nozzle, and the other side constitutes a container supply gas pipe leading to a liquid container And a liquid pipe having one end facing the bottom of the liquid container and the other end communicating with the two-fluid nozzle, and the liquid in the liquid container is removed by the pressurizing action of the gas supplied from the container supply gas pipe. Water is fed to a two-fluid nozzle through a liquid pipe.

  In one embodiment of the present invention, a coupler for attaching and detaching the container is attached to the inlet of the liquid container, and the container supply gas pipe is attached to the coupler as a double pipe through which the liquid pipe is inserted. It is characterized by.

  Furthermore, in one embodiment of the present invention, the coupler is provided with a screw detachable first coupler attached to an inlet of a liquid container, and the container supply gas pipe, and an inlet shaft with respect to the first coupler. And a second coupler that snaps in the direction.

  In one embodiment of the present invention, the first three-way connector constituting the bifurcated branch portion, the second three-way connector interposed in the container supply gas pipe using the two connection ports, and the second three-way connector And a relay connector that is attached to the remaining connection port of the connector via a connecting gas pipe and closes an end of the connecting gas pipe, and the liquid pipe includes a container supply gas pipe and a second three-pronged connector. And the inside of the connecting gas pipe are inserted into the two-fluid nozzle through the relay connector.

  In one embodiment of the present invention, the liquid container is a general-purpose PET bottle having a detachable screw portion in a neck portion as an injection port.

The present invention, as a piping system of a spray system, constitutes a nozzle supply gas pipe in which one end side leads to a compressor, the other end side branches by a bifurcated branch part, and one of them leads to a two-fluid nozzle, and the other is a liquid container. A gas pipe constituting a container supply gas pipe, and a liquid pipe having one end facing the bottom of the liquid container and the other end communicating with the two-fluid nozzle, and is supplied from the container supply gas pipe The liquid in the liquid container is supplied to the two-fluid nozzle through the liquid pipe by the pressurizing action of the gas.
Pressurized air from the compressor is supplied to the two-fluid nozzle via the nozzle supply gas pipe, and a part of the compressed air is led to the water surface in the liquid container via the container supply gas pipe, and water is supplied by the pressure. It is led out of the container by a liquid pipe and supplied to the two-fluid nozzle.
According to the present invention, since the power of the compressor that supplies the pressurized air is shared as a water supply drive source, a dedicated water supply motor as a water supply drive source and piping equipment for supplying tap water are separately provided. There is no need to provide it, and the entire system can be downsized and the manufacturing cost can be reduced. Since the number of parts is also reduced, the maintenance work can be simplified and the maintenance frequency can be reduced. In addition, since it is equipped with a detachable liquid container designed to supply liquid with the air pressure of the compressor, it can be used by moving it to any location without the need to install tap water piping for supplying liquid. be able to.

Here, in order to form a piping path through which air flows into the liquid container and water in the liquid container flows out of the container, in principle, the container supply gas pipe and the liquid pipe are connected to the cap of the liquid container. A hole for inserting a book may be formed to allow air and water to flow into and out of the liquid container. However, when the liquid container is composed of, for example, a PET bottle having a capacity of about 1 to 2 L, it is difficult to airtightly form the insertion holes of the liquid pipe and the gas pipe in the small diameter cap.
In the present invention, the coupler is attached to the inlet of the liquid container, and the container supply gas pipe is attached to the coupler as a double pipe having the liquid pipe inserted therein, so that a small insertion hole is not provided. The coupler also facilitates the formation of an insertion hole through which the container supply gas pipe and liquid pipe pass.

A general PET bottle has a neck portion formed with a thread and a screw detachable cap attached to the neck portion. If the container supply gas pipe is attached to the cap in an airtight manner, the container supply gas pipe also rotates together when the cap is rotated. This is because of the twisting reaction force of the container supply gas pipe. In addition, the smooth disengagement of the cap is impaired.
According to the present invention, a coupler is provided with a screw detachable first coupler that is attached to an inlet of a liquid container, and a container supply gas pipe that is snap-engaged in the axial direction of the inlet with respect to the first coupler. Since it is divided from the coupler, the container supply gas pipe can be separated from the PET bottle by simply pulling the second coupler upward, and then the container can be replaced by removing the first coupler from the liquid container.

Further, according to the present invention, in the piping system, a first three-way connector that constitutes a bifurcated branch portion, a second three-way connector that is interposed in the container supply gas pipe using two connection ports, and a second third And a relay connector that is attached to the remaining connection port of the connector via a connecting gas pipe and closes the end of the connecting gas pipe. The liquid pipe is connected to the container supply gas pipe and the second trifurcated pipe. The inside of each of the connector and the connecting gas pipe is inserted and communicated with the two-fluid nozzle via the relay connector.
According to this, the piping system can be simplified and the manufacturing cost can be further reduced.

  Furthermore, by using a general-purpose PET bottle as a liquid container and making it detachable from the system, a new liquid can be easily supplied by replacing the container itself, and the convenience of the system is improved. . At present, there is no international standard for the shape of the neck of PET bottles, but most of them are made in accordance with the unified standard that has been voluntarily determined, and the container according to the present invention can be put into practical use by conforming to this standard. The above container compatibility is remarkably enhanced and it can be used for multipurpose applications.

It is a block diagram of a spray system using a two-fluid nozzle according to the present invention. 1 is an external view of an example of a spray system using a two-fluid nozzle according to the present invention. It is sectional drawing of a relay connector. It is sectional drawing of a 1st coupler and a 2nd coupler. It is explanatory drawing of an example of a two-fluid nozzle. It is a block diagram of a spray system using a two-fluid nozzle according to a modification of the present invention.

  The spray system using the two-fluid nozzle of the present invention can be used for various purposes such as skin care for skin in beauty salons and homes, beauty / health use such as massage, use for air purification, and spray use used for virus suppression in hospital rooms. Can be applied for various purposes.

  In FIG. 2, a spray system 1 using a two-fluid nozzle of the present invention sprays droplets by mixing a compressor 2 that supplies high-pressure gas, a liquid container 3 that stores liquid, and gas and liquid. A two-fluid nozzle 4. The gas is generally air, and as the liquid, for example, various chemical solutions for water and other moisturizing, deodorizing, cosmetic and sterilizing are used.

  For example, the compressor 2 is attached to the case 5 together with a control panel 6 for driving control thereof. In the spray system for beauty / health use in a beauty salon or home, it is sufficient that the compressor 2 has an output rating of about 1 atm or less, and the outer shape is, for example, a small size commercial product of about 15 cm square and 20 cm long. Can be used. The case 5 is provided with a pressure gauge 7 indicating the pressure of the compressor 2 and a container pocket 8 for detachably storing the liquid container 3. A stand 9 is erected on the case 5, and the two-fluid nozzle 4 is detachably attached to the upper end of the stand 9. Gas and liquid are supplied to the two-fluid nozzle 4 through a gas pipe 10 and a liquid pipe 11, respectively.

  The two-fluid nozzle 4 is not particularly limited as long as it can mix a gas and a liquid in the nozzle and spray droplets from the tip of the nozzle. For example, the two-fluid nozzle 4 involves a swirling flow of gas shown in FIG. A two-fluid nozzle 4 or the like can be used. FIG. 5A is a cross-sectional view showing an outline of a two-fluid nozzle, FIG. 5B is an explanatory view of a first air current swirling portion, and FIG. 5C is an explanatory view of a second air current swirling portion. Although the layout position of the gas and liquid inlets is different from the nozzle 4 schematically shown in FIGS. 1 and 2, the internal structure for mixing and spraying the two fluids is the same.

The two-fluid nozzle 4 includes a liquid supply device 42, a gas supply device 43, a liquid film forming wall 44, a first airflow swirling portion 45 that swirls part of the supplied gas, and a second airflow swirling portion that swirls the remaining gas. 46 and a cylindrical outer cylinder 47. As shown in FIG. 5 (a), the liquid film forming wall 44 is erected in an annular shape so as to gradually decrease in diameter toward the injection port 48, and the circular opening edge 44b is formed at the pointed end, and the inner peripheral wall surface 44a becomes a formation part of a liquid film. A plurality of liquid injection holes 42 b are formed through the liquid supply device 42 along the circumferential direction so as to face the first airflow swirl unit 45. The end wall 42 a of the liquid supply device 42 becomes a conical projecting central body 42 c and extends in the axial direction to the vicinity of the circular opening edge 44 b of the liquid film forming wall 44.
The first airflow swirl 45 has a wall 45b that is formed in an annular shape from the end wall 42a of the liquid supply device 42 and abuts against the base 44c of the liquid film forming wall 44. As shown in FIG. 5 (b), a plurality of groove-shaped flow paths 45a for turning the first air flow are formed in communication with the flow path 43a of the gas supply device 43, as shown in FIG. The second airflow swirl 46 has a wall 46b that is formed in an annular shape from the outer peripheral edge of the base 44c of the liquid film forming wall 44 and abuts against the end wall 47a of the outer cylinder 47. As shown in FIG. 5C, a plurality of groove-shaped flow paths 46a for turning the second air flow are formed in communication with the flow path 43a of the gas supply device 43, as shown in FIG.
A circular opening is formed in the end wall 47 a of the outer cylinder 47, and an annular injection port 49 is formed so as to be concentric with the injection port 48 formed by the circular opening edge 44 b of the liquid film forming wall 44. Is done.

  The configuration of the two-fluid nozzle 4 is as described above, and the liquid is ejected from the liquid ejection hole 42b of the liquid supply device 42, adheres to the inner peripheral wall surface 44a of the liquid film forming wall 44, and is formed as a liquid film. On the other hand, a part of the gas flows from the flow path 43a of the gas supply device 43 into each flow path 45a of the first air flow swirl unit 45, thereby generating a first swirl air flow inside the liquid film forming wall 44, By this first swirling airflow, a shearing force acts on the liquid film to atomize the liquid, and droplets are discharged from the circular opening edge 44 b of the liquid film forming wall 44. Further, the remaining gas flows into each flow path 46 a of the second airflow swirl unit 46, so that a second swirl airflow is generated outside the liquid film forming wall 44. Further shearing force is applied by the second swirling air current, and the liquid particles are further atomized.

  FIG. 1 is a configuration block diagram of the present invention. The spray system 1 of the present invention comprises a nozzle supply gas pipe 13 having one end leading to the compressor 2 and the other end branched by a bifurcated branching portion 12 and one of which communicates with the two-fluid nozzle 4, and the other being a liquid container The gas pipe 10 constituting the container supply gas pipe 14 leading to 3 and the liquid pipe 11 having one end facing the bottom of the liquid container 3 and the other end leading to the two-fluid nozzle 4 are provided.

  A specific example will be described below. A compressor connection gas pipe 15 is attached to the air supply port of the compressor 2, and a first three-way connector 16 as the bifurcated branch portion 12 is attached to the downstream end of the compressor connection gas pipe 15. It is done. The nozzle supply gas pipe 13 is attached to one of the remaining two connection ports of the first trifurcated connector 16, and the container supply gas pipe 14 is attached to the other connection port. The nozzle supply gas pipe 13 communicates with the two-fluid nozzle 4 through the different diameter connector 17 and the nozzle connection gas pipe 18.

  On the other hand, a second trifurcated connector 19 is provided in the container supply gas pipe 14, and the first connection port of the second trifurcated connector 19 is connected to the first trifurcated connector via the container supply gas pipe 14A. 16 and the second connection port of the second trifurcated connector 19 is connected to the liquid container 3 through the container supply gas pipe 14B. A relay connector 21 is attached to the third connection port of the second trifurcated connector 19 via a connecting gas pipe 20. As shown in FIG. 3, the relay connector 21 closes the end of the connection gas pipe 20, and an annular seal member 25 is provided between the connection gas pipe 20 and the liquid pipe 11 in the relay connector 21. Is interposed, whereby the end of the connecting gas pipe 20 is closed. Each of the above gas pipes is made of, for example, a resin tube, and examples of diameters are a compressor connection gas pipe 15, a nozzle supply gas pipe 13, a container supply gas pipe 14 (container supply gas pipes 14A and 14B) and a connection. The gas pipe 20 is 6 mm, and the nozzle connection gas pipe 18 is 4 mm.

  Next, referring also to FIG. 4, the first coupler 22 is attached to the neck 3 </ b> A constituting the inlet of the liquid container 3, and the second coupler 23 is detachably attached to the first coupler 22. The liquid container 3 is, for example, a general-purpose PET bottle having a neck portion 3A having a thread formed on the outer periphery, and the first coupler 22 is attached to the liquid container 3 in a manner of being screwed to the thread of the neck portion 3A.

  The first coupler 22 and the second coupler 23 are made of a synthetic resin member, and the engagement between the first coupler 22 and the second coupler 23 is a snap engagement in the axial direction of the injection port 3A accompanied by elastic deformation of the resin. Specifically, the second coupler 23 is attached so as to cover the first coupler 22 from above, and is formed on the inner wall of the second coupler 23 in an annular recess 22A formed around the upper end of the first coupler 22. The annular convex portion 23A is snap-engaged. Both couplers are appropriately formed with through holes for allowing the gas and liquid tubes 11 to pass therethrough.

  The downstream end of the container supply gas pipe 14B is airtightly attached to the upper end of the second coupler 23, and one end of the liquid pipe 11 is inserted into the container supply gas pipe 14B and both the couplers 23, 22 to enter the liquid container 3. It extends to the bottom of the. That is, the container supply gas pipe 14B is attached to the second coupler as a double pipe through which the liquid pipe 11 is inserted. The other end of the liquid pipe 11 is fixed inside the relay connector 21 as shown in FIG. 3 after being inserted through the inside of the container supply gas pipe 14B, the second trifurcated connector 19 and the connecting gas pipe 20. The liquid pipe 11 communicates with the two-fluid nozzle 4 through the relay connector 21, the connecting liquid pipe 24, the different diameter connector 26, and the nozzle connection liquid pipe 27. Each of the above liquid pipes is also made of, for example, a resin tube. In the diameter example, the liquid pipe 11 is 3 mm, the connecting liquid pipe 24 is 4 mm, and the nozzle connection liquid pipe 27 is 3 mm.

As described above, the spray system of the present invention is used for various applications such as humidity control, skin care, sterilization, deodorization, etc., and water, skin care treatment chemicals, disinfectants, deodorants, and the like as spray liquids for that purpose. Is used.
Here, if a general-purpose PET bottle or the like is used as the liquid solution, most of these bottles are compatible with the shape of the neck thread being standardized as described above. A bottle containing water or a chemical solution can be easily attached to and detached from the threaded portion on the coupler side of the system, and the system can be multipurpose. In preparation for the need to replace with a non-standard PET bottle, if the first coupler 22 is provided with a plurality of options that have screwed portions corresponding to other representative standard PET bottles, these By replacing only the first coupler, it is possible to cope with replacement with almost all kinds of PET bottles.

  As the liquid container 3, it is preferable to use a small-capacity container in a short time and replace it with a new one so as not to use water or chemicals used for moisturizing treatment or the like in a state of changing with time. For example, considering the exchange every several hours or every day, a PET bottle having a capacity of about 1 to 2 L is suitable.

"Action"
The air pressurized by the compressor 2 is diverted to the nozzle supply gas pipe 13 side and the container supply gas pipe 14 side at the first trifurcated connector 16. The air that has flowed to the nozzle supply gas pipe 13 side is supplied to the two-fluid nozzle 4 via the different diameter connector 17 and the nozzle connection gas pipe 18. The air flowing to the container supply gas pipe 14 side flows into the space above the water surface in the liquid container 3 through the second coupler 23 and the first coupler 22 and pressurizes the liquid container 3. By this pressurizing action, the water in the liquid container 3 flows into the liquid pipe 11 and is supplied to the two-fluid nozzle 4 via the relay connector 21, the connecting liquid pipe 24, and the nozzle connection liquid pipe 27. The amount of water consumed per unit time is small, and most of the air flows in the nozzle supply gas pipe 13 side in the first three-way connector 19.
Since air entering the connection gas pipe 20 is blocked by the relay connector 21, only water is supplied to the two-fluid nozzle 4 by the liquid pipe 11 after the relay connector 21.

  When the liquid container 3 that has used up the liquid in the nozzle spraying operation by the compressor 2 is replaced with a new container, the second coupler 23 is pulled upward and removed from the first coupler 22, and then the first coupler 22 is turned to turn the screw. It is loosened and removed from the neck portion 3A, and is replaced with a new container. If the container supply gas pipe 14 is attached to the first coupler 22 that is detachable without screwing the second coupler 23, the container is used when the first coupler 22 is rotated for container replacement. Since the supply gas pipe 14 also rotates together, the smooth disengagement of the first coupler 22 is impaired due to the twisting reaction force of the container supply gas pipe 14, but in the present invention, the second coupler 23 is used. The container supply gas pipe 14 and the liquid pipe 11 can be separated from the liquid container 3 by simply pulling upward, and the first coupler 22 can be easily detached from the liquid container 3.

"Modification"
FIG. 6 is a configuration block diagram of a modified example of the spray system 1.
A compressor connection gas pipe 15 is attached to the air supply port of the compressor 2, and a trifurcated connector 30 as a bifurcated branch portion 12 is attached to the downstream end of the compressor connection gas pipe 15. The nozzle supply gas pipe 13 is attached to one of the remaining two connection ports of the three-way connector 30, and the container supply gas pipe 14 is attached to the other connection port. The nozzle supply gas pipe 13 communicates with the two-fluid nozzle 4 attached to the grip portion 31. The grip part 31 is a part to be gripped by hand, for example, when the two-fluid nozzle 4 is sprayed toward the face in a beauty salon or home. The grip portion 31 may be formed integrally with the two-fluid nozzle 4 or may be a separate member that is assembled to the two-fluid nozzle 4.

  The other end of the container supply gas pipe 14 is airtightly attached to the upper end of the second coupler 23. Also in this modification, one end of the liquid pipe 11 extends through the container supply gas pipe 14, the second coupler 23, and the first coupler 22 to the bottom of the liquid container 3. The other end of the liquid pipe 11 is inserted into the container supply gas pipe 14, the trifurcated connector 33, and the nozzle supply gas pipe 13, and then communicates with the two-fluid nozzle 4 attached to the grip portion 31. The air from the nozzle supply gas pipe 13 and the water from the liquid pipe 11 are separated by an internal piping structure (not shown) of the grip portion 31, and the inlet of the gas supply unit 43 and the liquid supply of the two-fluid nozzle 4 shown in FIG. Each is supplied to the inlet of the vessel 42.

  Also according to the modified example, the air pressurized by the compressor 2 is diverted to the nozzle supply gas pipe 13 side and the container supply gas pipe 14 side at the three-way connector 30. The air that has flowed to the nozzle supply gas pipe 13 side is supplied to the two-fluid nozzle 4 via the grip portion 31. The air flowing to the container supply gas pipe 14 side flows into the space above the water surface in the liquid container 3 through the second coupler 23 and the first coupler 22 and pressurizes the liquid container 3. By this pressurizing action, water in the liquid container 3 flows into the liquid pipe 11 and is supplied to the two-fluid nozzle 4 via the grip portion 31. The amount of water consumed per unit time is small, and most of the air flows in the nozzle supply gas pipe 13 side in the trifurcated connector 30.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to those described in the drawings, and various design changes can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Spraying system 2 Compressor 3 Liquid container 4 Two-fluid nozzle 10 Gas pipe 11 Liquid pipe 12 Forked branch part 13 Nozzle supply gas pipe 14 Container supply gas pipe 16 1st 3rd connector 19 2nd 3rd connector 20 Connection gas pipe 21 relay connector 22 first coupler 23 second coupler

Claims (5)

A compressor for supplying high-pressure gas;
A removable liquid container for storing liquid;
A two-fluid nozzle that mixes gas and liquid to spray droplets;
A spraying system comprising:
One end side leads to a compressor, the other end side branches by a bifurcated branch part, one of which constitutes a nozzle supply gas pipe leading to a two-fluid nozzle, and the other side constitutes a container supply gas pipe leading to a liquid container When,
A liquid pipe with one end facing the bottom of the liquid container and the other end leading to the two-fluid nozzle;
With
A spray system using a two-fluid nozzle, wherein the liquid in a liquid container is supplied to the two-fluid nozzle through the liquid pipe by the pressurizing action of the gas supplied from the container supply gas pipe. A coupler for attaching / detaching the container is attached to the inlet of the liquid container,
The spray system using a two-fluid nozzle according to claim 1, wherein the container supply gas pipe is attached to the coupler as a double pipe having the liquid pipe inserted therein. The coupler is
A screw detachable first coupler attached to the inlet of the liquid container;
A second coupler to which the container supply gas pipe is attached and snap-engaged with the first coupler in the axial direction of the inlet;
The spray system using the two-fluid nozzle according to claim 2, comprising: A first trifurcated connector constituting the bifurcated branch part;
A second trifurcated connector interposed in the container supply gas pipe using two connection ports;
A relay connector attached to the remaining connection port of the second trifurcated connector via a connecting gas pipe, and closing the end of the connecting gas pipe;
With
4. The liquid pipe is inserted through the interior of a container supply gas pipe, a second trifurcated connector, and a connecting gas pipe, and communicates with a two-fluid nozzle through the relay connector. A spray system using the two-fluid nozzle described in 1.   The spray using the two-fluid nozzle according to any one of claims 1 to 4, wherein the liquid container is a general-purpose PET bottle having a detachable screw portion in a neck portion as an injection port. system.

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