JP2008110318A - Liquid spraying nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid spraying nozzle capable of decreasing an amount of drift without lowering workability. <P>SOLUTION: The liquid spraying nozzle 1 in which a passage for forming a straight ejection component 53 and a passage for forming a swirling ejection component 39 are formed by branching a liquid feeding passage in the course of the liquid feeding passage S is constituted so that the flow rate of a liquid flowing through at least one of the passage for forming a straight ejection component 53 and the passage for forming a swirling ejection component 39 is controlled by a flow rate control valve 17 installed at the branched part 22 of the liquid feeding passage while the liquid flowing through at least one flow passage is ejected from a first ejection opening 41. The liquid flow passage on the lower stream side of the first ejection opening 41 is provided with a suction opening 29 for outside air, an outside air sucking structure 52 sucking outside air from the suction opening by the liquid from the first ejection opening 41, an air and liquid mixing structure 56 mixing the outside air from the outside air sucking structure 52 with the liquid from the first ejection opening 41, and a second ejecting opening 34 ejecting the air/liquid mixture. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid spray nozzle that can be switched between a straight-ahead spray for spraying a liquid far away and a wide-angle spray for spraying a liquid at a wide angle.

  Conventionally, what was described in the following patent document 1 is known as this kind of liquid spraying nozzle. In the liquid spraying nozzle described in Patent Document 1, a vortex forming core containing chamber, a vortex generating chamber, a first injection port, an outside air suction hole, an ejector passage, a gas liquid and a liquid supply path for supplying pressurized liquid The mixing chamber and the second injection port are provided in this order in the liquid supply direction, and the vortex forming core can freely move back and forth in the liquid supply direction in the storage chamber and the vortex generating chamber. According to this liquid spraying nozzle, the grip provided at the end of the handheld handle is turned to move the eddy current forming core to the accommodation chamber, whereby the liquid is jetted straight from the second injection port, and the eddy current forming core is generated. By moving the liquid into the chamber, the liquid is ejected from the second ejection port at a wide angle.

  However, in this liquid spray nozzle, the vortex forming core must be moved back and forth in the liquid supply path. In addition, if there is a bent portion in the liquid supply path on the downstream side of the vortex generating chamber, the vortex generated in the vortex generating chamber is greatly attenuated at the bent portion and inhibits wide-angle injection. As a result, the entire liquid spray nozzle has to be formed linearly. In this way, the liquid spray nozzle formed in a straight line sprays liquid fertilizer and pesticides only in the straight direction, so there is a problem that spraying from the bottom is difficult, and it is not possible to spray reliably on the back of vegetables. It was. In addition, it is necessary to manufacture a vortex forming core having a vortex groove, a storage chamber having a predetermined gap with the vortex forming core, and a vortex generating chamber in which the vortex forming core slides movably. For this reason, the configuration is complicated and cannot be provided simply and inexpensively.

  Therefore, a liquid spray nozzle 61 as shown in FIG. 7 is described in Patent Document 2 below. In the liquid spray nozzle 61, an orifice plate 72 having an ejection port 71 is provided at the tip of a liquid supply path S1 that supplies pressurized liquid, and a flow rate that can freely advance and retreat in the liquid supply direction in the middle of the liquid supply path S1. A control valve 73, a valve seat plate 75 having a water passage hole 74, and a liquid flow restricting member 76 are provided in this order in the liquid supply direction. According to this liquid spraying nozzle 61, the grip (not shown) provided at the end of the handheld handle is turned to move the flow control valve 73 forward and backward, thereby opening and closing the water passage hole 74 of the valve seat plate 75, thereby allowing the liquid to flow. From the injection port 71 of the orifice plate 72, straight injection or wide-angle injection is performed. In this liquid spray nozzle 61, the liquid supply path S1 is bent at the downstream position of the flow control valve 73, and the direction of the injection port 71 is inclined from the axial direction of the handheld rod. It is possible to freely change the direction of the injection port 71 by simply adjusting the direction of. Therefore, it is suitable for the case where it is sprayed on the back of the vegetable leaf from below or on the stem from the side.

JP 2006-35081 A

Japanese Utility Model Publication No. 2-37763

  However, in the liquid spray nozzle described in Patent Document 2, since only the liquid is ejected from the ejection port, the diameter of the sprayed mist droplet is extremely small, for example, 100 μm or less. For this reason, mist drops tend to float in the air, mist drops scatter on the wind, reach the distance by the so-called drift phenomenon, and spray unnecessarily on the adjacent vegetable garden where certain chemical spraying is prohibited There was a risk of being. In order to prevent such inconveniences, it was necessary to spray the chemical liquid with a reduced injection amount, and it was necessary to spray the chemical liquid with low workability.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a liquid spray nozzle that can reduce the drift amount without deteriorating workability.

  In order to achieve the above object, a liquid spraying nozzle according to the present invention includes a liquid supply path that supplies a pressurized liquid, and the liquid supply path is branched in the middle of the liquid supply path so as to be a straight jet component. Forming a forming passage and a swirling jet component forming passage, and providing a flow rate control valve in the liquid supply passage of the branch portion to flow through at least one of the straight jet component forming passage and the swirling jet component forming passage The flow rate of the liquid is controlled, and the liquid flowing through the at least one passage is injected from a first injection port provided in a liquid supply passage on the downstream side of the joining position of the straight jet component forming passage and the swirl jet component forming passage. In the liquid spray nozzle configured to perform the above operation, outside air is supplied from the intake hole to the liquid supply path downstream of the first injection port by the intake hole for sucking outside air and the liquid jetted from the first injection port. Inhaled into the road An outside air suction structure, a gas-liquid mixing structure that mixes the outside air sucked by the outside air suction structure and the liquid jetted from the first injection port, and jets the gas mixture mixed in the gas-liquid mixing structure The second injection port is provided.

  Further, in the above configuration, a core storage chamber is provided in the liquid supply path between the branch portion and the first injection port, and a rotating core for rotating the liquid from the flow control valve is held in the core storage chamber. The swirling core includes a passage outer peripheral surface that forms a swirl jet component forming passage with the inner peripheral surface of the core housing chamber, a through hole that forms a straight jet component forming passage, and a passage outer peripheral surface. And a swirl flow imparting structure that imparts a swirl flow to the liquid from the liquid.

  In each of the above-described configurations, the liquid supply path is formed by being bent at a downstream position of the branch portion.

  According to the liquid spraying nozzle according to the present invention, the liquid ejected from the first ejection port is mixed with the outside air and then mixed with the outside air because it is mixed with the sucked outside air and then straightly jetted or wide-angle jetted from the second ejection port. Compared with the prior art which is ejected without any problem, it is possible to obtain a mist droplet having a diameter several times larger. Thereby, the drift amount of a mist can be reduced and it can prevent surroundings from being troubled. As a result, it is not necessary to spray the liquid by reducing the injection amount in consideration of the drift phenomenon, and the spraying operation can be performed without deteriorating workability.

  In addition, when the turning core is fixedly arranged in the liquid supply path between the branch portion and the first injection port, the flow control valve, which is an advancing / retreating member, is always upstream of the branch portion. It can be bent at the downstream position of the branch portion.

  If the liquid supply path is bent at the downstream position of the branch part, the angle of the liquid supply path of the part held by hand and the direction of the bent nozzle downstream side can be adjusted by hand. The direction of the second injection port can be freely changed. Therefore, large-diameter mist droplets can be ejected from various angles with respect to the spray object.

The best mode for carrying out the present invention will be described with reference to the drawings. The embodiment described below is merely an example embodying the present invention, and does not limit the technical scope of the present invention. FIG. 1 is an external view of a liquid spray nozzle according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part of the liquid spray nozzle, and FIG. 3 is a side cross-sectional view in which a part of the liquid spray nozzle is omitted. 4A and 4B show some parts of the liquid spray nozzle, where FIG. 4A is a perspective view of the turning core, FIG. 4B is a side view of the turning core, and FIG. 4C is a front view of the turning core. ) Is a front view of an orifice plate having a second injection port, and FIG. 5 is a cross-sectional view taken along line AA in FIG.
In each figure, a liquid spray nozzle 1 according to this embodiment is for applying fertilizer or agricultural chemicals to a field, for example, and is a grip attached to the end of a cylindrical inner pipe 5 accommodated in an outer pipe 2. The handle 10 consists of a hand-held portion T that moves the inner pipe 5 forward and backward relative to the outer pipe 2 by rotating the handle 10 by hand, and a nozzle portion N that is provided at the tip of the hand-held portion T and injects a chemical. . The connection port 11 at the end of the hand-held portion T is connected to a discharge port of a pressure-feed pump placed at a location away from the liquid spray nozzle 1 via a hose (both not shown). If the outer pipe 2 is composed of an aluminum pipe, the weight can be reduced while maintaining a certain level of corrosion resistance, and the spraying workability can be improved.

  In the hand-held portion T, cylindrical pipe joints 3 and 4 are inserted into both end openings of the outer pipe 2 and fixed by caulking or the like. A straight tubular inner pipe 5 having a liquid supply path 13 is inserted into the tubes of the pipe joints 3 and 4 so as to be movable in the cylinder center direction. A cylindrical pipe joint 6 is fixed to the outer periphery of the end of the inner pipe 5, and a grip handle 10 is fixed to the pipe joint 6. A female screw portion 12 for connecting to the hose is formed on the inner surface of the connection port 11 of the handle 10. A grip handle 14 is attached to the outer peripheral surface of the outer pipe 2. A female screw portion 8 is formed on the inner peripheral surface on the end side of the pipe joint 4. On the outer peripheral surface on the distal end side of the pipe joint 6, a male thread part 9 that is screwed with the female thread part 8 of the pipe joint 4 is formed. The female screw portion 8 and the male screw portion 9 are screwed by relative rotation between the outer pipe 2 and the inner pipe 5 to move the outer pipe 2 or the inner pipe 5 relative to each other in the cylinder center direction. At the end of the pipe joint 4, a cylindrical cap 7 for screwing and locking the movable pipe joint 6 is screwed.

The nozzle portion N is configured on the basis of a cylindrical base casing 20 that is formed by bending in a substantially U shape when viewed from the side. A liquid supply path 19 having a diameter larger than that of the inner pipe 5 is formed on the terminal side of the base casing 20 up to a position immediately upstream of the bent portion 23. The liquid supply path 19 is loaded with a seal portion 15 using an O-ring or the like that slidably seals the inner pipe 5 of the handheld portion T. The end of the base casing 20 is connected to the pipe joint 3 of the hand-held part T by a union cap 16. A conical cylindrical flow control valve 17 is attached to the tip of the inner pipe 5. On the side surface of the flow control valve 17, a water passage hole 18 is formed to allow the chemical solution from the inner pipe 5 to flow to the liquid supply path 19. A valve seat plate 21 that is opened and closed by the flow rate control valve 17 is disposed in the back end of the liquid supply path 19. The valve seat plate 21 is opened and closed by the flow control valve 17 to communicate the through hole 25 of the turning core 25 and the liquid supply passage 19 with a water passage hole 40 at the center of the plate, and swirl jet component forming passages 39 and 39. Water passage holes 36, 36 on both sides of the plate communicating with the liquid supply path 19 are provided. That is, the valve seat plate 21 is a branch portion 22 that branches the liquid supply path into the straight jet component forming passage 53 and the swirl jet component forming passages 39, 39, and upstream of the bent portion 23 of the base casing 20. Has been deployed. The water passage hole 40 of the valve seat plate 21 is not fully closed even when the flow control valve 17 stops contacting, and a gap (not shown) is provided between the flow control valve 17 and a small amount of chemical liquid. Is formed.

  A core housing chamber 45 is formed on the distal end side of the base casing 20, that is, on the downstream side of the bent portion 23. In this core housing chamber 45, a turning core 24 for turning the chemical solution from the valve seat plate 21 is housed and held. The turning core 24 includes a cylindrical core body 46 having a through hole 25 in the center thereof, a flange 47 having a diameter larger than that of the core body 46 provided at the tip of the core body 46, and a core body. And 46 are provided on the outer peripheral surface of 46. On the outer peripheral surface of the flange portion 47, turning grooves 49, 49 are formed along substantially tangential directions, respectively. The pair of turning grooves 49, 49 are arranged at positions rotated 180 degrees around the cylindrical center of the flange portion 47. However, the number of turning grooves 49 is not limited to two, and the arrangement in the flange 47 may not be a uniform angle. A cylindrical swirl generating space 50 that communicates with the swivel grooves 49 and 49 is formed at the distal end surface of the flange portion 47. The turning core 24 is fixed and fixed to the base casing 20 by engaging locking protrusions 48 and 48 in engagement grooves 51 and 51 formed in the core housing chamber 45 of the base casing 20. That is, the swirling core 24 has a passage outer peripheral surface 37 that forms a swirl jet component forming passage 39 and a through hole that forms a straight jet component forming passage 53 between the inner peripheral surface 38 of the core containing chamber 45. 25 and swirl grooves 49 and 49 that are formed so as to be connected to the swirl jet component forming passage 39 and form swirl flow imparting structures 54 and 54 that impart a swirl flow to the chemical solution.

  The front end of the base casing 20 is connected to the end of the front casing 28 by screwing the union cap 30 with the O-ring 43 interposed. The leading casing 28 has a merge space 26 formed at the end thereof, a gas-liquid mixing chamber 32 forming a gas-liquid mixing structure 56 formed at the tip side, and a merge between the merge space 26 and the gas-liquid mixing chamber 32. The ejector passage 31 is smaller in diameter than the space 26 and the gas-liquid mixing chamber 32. Note that the upstream side of the orifice plate 27 in the above-described joining space 26 is the joining space referred to in the present invention. A conical cylindrical orifice plate 27 having a first injection port 41 formed at the tip is disposed on the tip surface of the turning core 24 at a position in front of the base casing 20. The opening shape of the first injection port 41 is circular. The orifice plate 27 is sandwiched and fixed between the front surface of the flange portion 47 of the turning core 24 and the inner peripheral surface step portion of the merge space 26 of the front casing 28 at the periphery thereof.

  An intake hole 29 that communicates the downstream space of the orifice plate 27 in the merge space 26 and the outside is formed in the peripheral wall of the merge space 26 of the front casing 28. A predetermined gap for causing the ejector action is provided between the opening edge of the ejector passage 31 facing the first injection port 41 and the orifice plate 27. The gas-liquid mixing chamber 32 is formed as a cylindrical space, and its inner diameter is sufficiently larger than the inner diameter of the ejector passage 31 so that gas-liquid mixing can be performed reliably. The front opening of the gas-liquid mixing chamber 32 of the front casing 28 is sealed with an orifice plate 33 having a second injection port 34. The orifice plate 33 and the O-ring 44 are fixed by a union cap 35 that is screwed to the tip of the front casing 28. In this case, the opening shape of the second injection port 34 of the orifice plate 33 is a predetermined angle θ (= 30 degrees) from the horizontal direction (the direction along the one-dot chain line H in FIG. 4D) when viewed from the front. ) Is formed in an oval shape that is long in the direction of left rotation. This is because, as will be described in detail later, the spray pattern of the mist droplets ejected while turning clockwise as viewed from the front from the second ejection port 34 when spraying over a wide range is made flat in the horizontal direction. The periphery of the front casing 28 is covered with a hood 42. In this way, the connection port 11 of the handle 10, the liquid supply path 13 of the inner pipe 5, the water flow hole 18 of the flow control valve 17, the liquid supply path 19 of the base casing 20, and the water flow hole 40 of the valve seat plate 21. 36, 36, the through hole 25 of the turning core 24, the turning ejection component forming passages 39, 39, the turning grooves 49, 49, the merge space 26 of the front casing 28, the first injection port 41 of the orifice plate 27, The ejector passage 31 and the gas-liquid mixing chamber 32 constitute the entire liquid supply path S (corresponding to the liquid supply path of the present invention).

  Next, the operation of the liquid spray nozzle 1 configured as described above will be described. First, when spraying over a wide range, as shown in FIG. 5, the handle 10 is turned by hand to advance the flow control valve 17 and seat on the valve seat plate 21 to close the water passage hole 40. To do. Therefore, the chemical liquid pressurized by the pressure pump passes through the liquid supply passage 13, the water passage holes 18 and 18, and the liquid supply passage 19, and most of the chemical solution passes through the water passage holes 36 and 36 and forms the swirl jet component forming passages 39 and 39. To be supplied. The chemical liquid supplied to the swirl jet component forming passages 39 and 39 is given a tangential swirl force in the swirl grooves 49 and 49 of the swirl core 24 and flows into the swirl generation space 50. After the turning motion is stabilized, it flows into the merge space 26. The chemical solution flowing into the merge space 26 is injected from the first injection port 41 of the orifice plate 27 after joining with the remaining chemical solution flowing from the through hole 25 through the gap portion of the water passage hole 40 of the valve seat plate 21. . When the chemical liquid ejected from the first ejection port 41 passes through the narrow ejector passage 31, it causes an ejector action, lowering the pressure of the liquid supply passage on the downstream side of the orifice plate 27 to draw outside air from the intake holes 29, 29. Inhale. That is, the combination of the conical orifice plate 27, the first injection port 41 of the orifice plate 27, and the ejector passage 31 of the front casing 28 constitutes an outside air suction structure 52 that sucks outside air into the liquid supply passage. .

  Then, the chemical solution and the outside air that have passed through the ejector passage 31 while rotating at a high speed are appropriately swirled and mixed in the sufficiently large gas-liquid mixing chamber 32. Further, the swirled mixed gas / liquid is jetted to the outside from the second jet port 34 of the orifice plate 33 while swiveling clockwise as viewed from the front. In this case, since the opening shape of the second injection port 34 is an oval shape, the spray pattern P1 of the mist droplets W1 injected from the second injection port 34 is viewed in the horizontal direction when viewed from the front of the second injection port 34 ( As shown in FIG. 4 (d), the oval or elliptical shape is widened, and the spray angle is further widened as compared with the case where the second injection port having a circular opening shape is used. Further, the spray pattern P1 has a full conical shape in which not only the pattern periphery but also the central portion is filled with mist droplets when viewed from the front. These composite characteristics can improve workability. The diameter of the mist droplet W1 generated at this time was about four times larger than when the chemical spray nozzle described in Patent Document 2 was used in the fine-particle wide-angle injection mode. As a result, the time from the injection of the mist droplet W1 to the landing is much faster than before, and the degree to which the mist droplet W1 is scattered far away due to the drift phenomenon is extremely small. Therefore, it is possible to prevent a problem that the spraying of a certain chemical solution is inadvertently sprayed on the adjacent vegetable garden. As a result, it is no longer necessary to spray the chemical solution by reducing the injection amount in consideration of the drift phenomenon, and the spraying operation can be performed without deteriorating workability. Further, since the base casing 20 is bent at the downstream side position (bending portion 23) of the valve seat plate 21 (branching portion 22), the angle of the hand-held portion T and the orientation of the nozzle portion N can be adjusted by hand. The direction of the two injection ports 34 can be freely changed. Thereby, it can use suitably, when spraying from the bottom to the leaf back of vegetables, or spraying to a stem from the side. In this way, the base casing 20 can be bent at the downstream position of the branch portion 22 because the swiveling core 24 is fixedly arranged in the liquid supply path between the branch portion 22 and the first injection port 41. Because. In addition, since a gap is provided in the water passage hole 40 of the valve seat plate 21, the amount of injection from the second injection port 34 is not extremely reduced even during the maximum wide-angle spraying. Can prevent backflow.

  On the other hand, when spraying a chemical solution in the distance, as shown in FIG. 6, the handle 10 is turned by hand, the flow control valve 17 is moved backward to be separated from the valve seat plate 21 and the water passage hole 40 is opened. Then, most of the chemical liquid pressurized by the pressure feed pump is supplied from the water passage hole 40 to the through hole 25 (straight forward ejection component forming passage 53) of the turning core 24 and flows into the merge space 26. The remaining chemical liquid is supplied to the swirl jet component forming passages 39 and 39 from the water flow holes 36 and 36 and flows into the merge space 26 after the swirl motion is given by the swirl core 24 as described in FIG. . The chemical solution of the straight jet component flowing into the merge space 26 is given a slight turning force by the chemical solution of the swirl jet component that merges in the space. The combined chemicals are ejected from the first ejection port 41 of the orifice plate 27. The chemical liquid ejected from the first injection port 41 causes the outside air suction structure 52 to suck the outside air from the intake holes 29 and 29. The chemical solution and the outside air that have passed through the ejector passage 31 are mixed in the gas-liquid mixing chamber 32 and then injected to the outside from the second injection port 34 of the orifice plate 33. The mist droplet W2 ejected from the second ejection port 34 has a large amount of straight-spouted component chemical and a small swirl-sprayed component, so that it does not spread in the vicinity and the spray angle of the spray pattern P2 is narrow and an oval or elliptical cross section While maintaining the shape, it expands little by little and is sprayed far away. Then, the diameter of the mist droplet W2 generated at this time is also larger than that in the case where the conventional chemical solution spray nozzle is operated in the straight jet mode, and the amount of fine mist droplets generated is extremely reduced. Accordingly, it is possible to suppress a drift phenomenon caused by fine mist droplets in the straight-ahead injection. Furthermore, in addition to the large diameter of the mist droplet W2, since the nozzle portion N is bent at the bent portion 23, by holding the liquid spray nozzle 1 in the saddle direction and raising the second injection port 34, Compared with those described in Patent Documents 1 and 2, the flying distance of the mist droplet W2 can be extended.

In the above embodiment, the flow control valve is provided in the straight jet component forming passage. However, the present invention is not limited thereto. For example, the flow control valve is provided in the swirl jet component forming passage. It doesn't matter. Alternatively, flow control valves may be provided in both the straight jet component forming passage and the swirl jet component forming passage.
Moreover, although the example which bent the nozzle part N with respect to the hand-held part T was shown above, this invention is not limited to it, The thing with which the hand-held part and the nozzle part were comprised linearly is included. Thus, even if the liquid spraying nozzle is configured linearly as a whole, since the diameter of the mist droplets ejected from the second ejection port is large, a corresponding effect can be obtained.
Alternatively, on the downstream side of the grip handle that rotates / retracts the inner pipe on the end side of the handle portion, another handle handle having a connection port is provided at an angle from the axis of the handle portion, and from the connection port near the handle handle Also included in the present invention is a so-called gun-type liquid spray nozzle that is provided with an on-off valve that opens and closes the liquid supply path, and that is opened and closed by operating a trigger lever that is swingably provided in the vicinity of the on-off valve. It is.
And it goes without saying that the water passage hole 40 of the valve seat plate 21 may be formed in an opening shape that is completely sealed when the flow control valve 17 stops contacting.
Further, the opening shape of the second injection port is not limited to an oval shape, and may be appropriately selected according to the purpose of use. For example, the shape may be a circular shape or other shapes. Not limited to agricultural chemicals, there is no particular limitation as long as it can be suitably used for spraying.

It is an external view of the liquid spraying nozzle which concerns on one Embodiment of this invention. It is a principal part disassembled perspective view of the said liquid spray nozzle. FIG. 3 is a side cross-sectional view of the liquid spray nozzle that is partially omitted. Fig. 4 shows a part of the liquid spray nozzle, wherein (a) is a perspective view of the turning core, (b) is a side view of the turning core, (c) is a front view of the turning core, and (d) is a first view. It is a front view of an orifice plate having two injection ports. It is an AA arrow directional cross-sectional view in FIG. It is sectional drawing which shows the aspect which open | released the straight injection component formation channel | path from the liquid spray nozzle of FIG. It is a sectional side view in which a part of a conventional liquid spray nozzle is omitted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid spray nozzle 11 Connection port 13 Liquid supply path 17 Flow control valve 18 Water flow hole 19 Liquid supply path 21 Valve seat plate 22 Branch part 23 Bending part 24 Turning core 25 Through hole 26 Merge space 27 Orifice plate 29 Intake hole 31 Ejector passage 32 Gas-liquid mixing chamber 33 Orifice plate 34 Second injection port 36 Water passage hole 37 Passage outer peripheral surface 38 Inner peripheral surface 39 Swirling jet component forming passage 40 Water passage hole 41 First injection port 45 Core housing chamber 49 Swirling groove 50 Swirling generation space 52 Outside air suction structure 53 Straight jet component forming passage 54 Swirling flow imparting structure 56 Gas-liquid mixing structure S Liquid supply paths W1, W2

Claims (3)

A liquid supply path for supplying a pressurized liquid; and branching the liquid supply path in the middle of the liquid supply path to form a straight jet component forming passage and a swirl jet component forming channel; A flow control valve is provided in the liquid supply passage of the part to control the flow rate of the liquid flowing through at least one of the straight jet component forming passage and the swirling jet component forming passage, and the liquid flowing through the at least one passage is In the liquid spray nozzle configured to inject from the first injection port provided in the liquid supply path on the downstream side of the joining position of the straight jet component formation passage and the swirl jet component formation passage, than the first injection port An intake hole for sucking outside air into the liquid supply path on the downstream side, an outside air suction structure for sucking outside air from the suction hole into the liquid supply path by the liquid ejected from the first injection port, and the outside air suction structure With outside air A liquid dispersion comprising a gas-liquid mixing structure for mixing liquid ejected from one ejection port and a second ejection port for ejecting the gas-liquid mixture mixed in the gas-liquid mixing structure nozzle. A core housing chamber is provided in the liquid supply path between the branch portion and the first injection port, and a swirling core for swirling the liquid from the flow control valve is held in the core housing chamber. , A passage outer peripheral surface forming a swirl jet component forming passage with the inner peripheral surface of the core housing chamber, a through hole forming a straight jet component forming passage, and a swirl flow to the liquid from the passage outer peripheral surface The liquid spray nozzle according to claim 1, further comprising a swirl flow imparting structure that imparts a turbulent flow. The liquid spraying nozzle according to claim 1, wherein the liquid supply path is bent at a downstream position of the branching portion.

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