Nozzle for spraying liquid

Abstract

To provide a nozzle for spraying liquid that even when a distance between a tip of a nozzle and an object to be sprayed is short, can decrease strength in spraying while keeping diameters of sprayed liquid droplets at a desired value, and control a spray area in a circular shape at low supply pressure.SOLUTION: A nozzle for spraying liquid comprises a nozzle part having a nozzle hole opened at a tip thereof, which is vibratably constituted of flexible materials and a load eccentric part, provided at a tip portion of the nozzle part, which applies a load in a release direction of the nozzle part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a liquid spray nozzle used for spraying liquid for artificial rainfall, experiments, irrigation, cooling, dust prevention, and the like. [Background technology]

[0002] As a liquid spray nozzle, Patent Document 1 describes an artificial rain nozzle having a thin tube that is detachably connected to a water supply source, a flexible tube that is connected to the thin tube and has an outlet at its tip, and a guide fin that is fixed to the thin tube side of the flexible tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4711112 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the nozzle described in Patent Document 1, when water is sprayed from the nozzle at the tip of the flexible tube, the force of the water causes the nozzle to vibrate, and artificial rain can be reproduced with droplets having a diameter close to that of natural rain. It is described that the droplet diameter in this case can be adjusted by setting the inner diameter of the thin tube, the length of the flexible tube, the operating pressure of the supply water, etc.

[0005] However, with conventional liquid spray nozzles, including the artificial rain nozzle described in Patent Document 1, the operating pressure of the supply water had to be as high as or higher than the water pressure of an ordinary household in order to vibrate the nozzle. Also, when the distance between the nozzle tip and the target object of rainfall is short (for example, indoors with a ceiling, when the target object of rainfall is high, when rainfall is to be achieved inside an airtight container, etc.), it was necessary to significantly increase the spray intensity (amount sprayed per unit time, equivalent to the rainfall intensity in natural rainfall) in order to achieve rainfall with a desired large droplet diameter.

[0006] Furthermore, with conventional liquid spray nozzles, when the distance between the nozzle tip and the target object for rainfall is short, the target area for rainfall becomes band-shaped or elliptical, and in order to eliminate this and make the target area for rainfall circular, it was necessary to increase the operating pressure of the liquid.

[0007] Therefore, an object of the present invention is to provide a nozzle for spraying liquid that can reduce the spray intensity (amount sprayed per unit time) while maintaining the diameter (particle size) of the sprayed droplets at a desired value, even when the distance between the nozzle tip and the object to be sprayed is short.

[0008] Another object of the present invention is to provide a nozzle for spraying liquid, which is capable of controlling the spray area to a circular shape with a low supply pressure. [Means for solving the problem]

[0009] According to the present invention, a liquid spray nozzle has a nozzle portion having a nozzle hole opening at its tip and constructed of a flexible material so as to be capable of vibrating, and a load eccentric portion provided at the tip of the nozzle portion and applying a load in an off-axis direction to the nozzle portion.

[0010] A load eccentric part that applies a load in the off-axis direction of the nozzle part is provided at the tip of the nozzle part. In addition, the nozzle part is made of a flexible material so that it can vibrate. As a result, when water is sprayed from the nozzle hole, the nozzle part vibrates due to the supply pressure of the water, but since the load eccentric part applies a load in the off-axis direction of the nozzle part, the nozzle part sprays while vibrating self-excited like a pendulum at a lower supply pressure. As a result, the spray intensity (amount of spray per unit time) can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. In addition, it is possible to control the spray area to a circular shape at a low supply pressure. Furthermore, since spraying can be performed at a low supply pressure, the durability of the nozzle is improved and energy saving can be contributed.

[0011] It is preferable that the load eccentric portion is provided at the tip of the nozzle portion and is composed of at least one protruding portion protruding in the off-axis direction.

[0012] In this case, it is more preferable that at least one protrusion protrudes in only one direction off-axis from the nozzle portion.

[0013] In this case, it is more preferable that at least one protrusion protrudes in a plurality of directions off-axis from the nozzle portion.

[0014] In this case, it is more preferable that at least one protrusion has an approximately rectangular parallelepiped shape, an approximately flat plate shape, an approximately cylindrical shape, an approximately semi-cylinder shape, an approximately conical shape, an approximately prism shape, an approximately semi-prism shape, an approximately pyramid shape, an approximately spherical shape, or an approximately hemispherical shape.

[0015] In this case, it is also preferable that at least one of the protrusions is integrally formed with the nozzle portion from the same material.

[0016] In this case, it is also preferable that at least one protrusion is formed from a material different from that of the nozzle portion and is fixed to the nozzle portion.

[0017] It is also preferable that the nozzle portion includes a guide fin provided on the base end side of the nozzle portion.

[0018] In this case, it is more preferable that the width direction of the guide fin is within a plane parallel to the off-axis direction of the load eccentric portion.

[0019] It is also preferable that the nozzle portion has a shape with a constant diameter along the axial direction of the nozzle portion.

[0020] It is also preferable that the nozzle portion has a tapered shape with a diameter decreasing toward the tip of the nozzle portion. Effect of the Invention

[0021] According to the present invention, it is possible to significantly reduce the spray intensity while maintaining the diameter of the sprayed droplets at a desired value. Also, it is possible to control the spray area to a circular shape with a low supply pressure. As a result, spraying can be performed with a low supply pressure, which improves the durability of the nozzle and contributes to energy saving. [Brief description of the drawings]

[0022] [Figure 1] 1 is a perspective view showing a schematic configuration of a first embodiment of a liquid spray nozzle of the present invention. [Diagram 2] 5A to 5C are diagrams illustrating the action of self-excited vibration of a flexible tube portion in the liquid spray nozzle of the first embodiment. [Diagram 3] 4A and 4B are diagrams for explaining the attachment directions of a guide fin and a load eccentric portion in the liquid spray nozzle of the first embodiment and the movement direction of the liquid spray nozzle. [Figure 4] FIG. 2 is a perspective view showing the configuration of a second embodiment of a liquid spray nozzle according to the present invention. [Diagram 5] FIG. 11 is a perspective view showing the configuration of a third embodiment of a liquid spray nozzle according to the present invention. [Figure 6] FIG. 11 is a perspective view showing the schematic configuration of a fourth embodiment of a liquid spray nozzle of the present invention. [Figure 7] FIG. 11 is a perspective view showing the configuration of a fifth embodiment of a liquid spray nozzle according to the present invention. [Figure 8] FIG. 13 is a perspective view showing the configuration of a sixth embodiment of a liquid spray nozzle according to the present invention. [Figure 9] FIG. 13 is a perspective view showing the configuration of a seventh embodiment of a liquid spray nozzle according to the present invention. [Figure 10] FIG. 13 is a perspective view showing the configuration of an eighth embodiment of the liquid spray nozzle of the present invention. [Figure 11] FIG. 13 is a perspective view showing the configuration of a ninth embodiment of a liquid spray nozzle according to the present invention. [Figure 12] FIG. 23 is a perspective view showing the configuration of a liquid spray nozzle according to a tenth embodiment of the present invention. [Figure 13] FIG. 2 is a diagram showing measurement positions and spray distribution when spray intensity is measured for the liquid spray nozzle of Example 1 of the present invention. [Figure 14] FIG. 2 is a diagram showing measurement positions and spray distribution when the spray intensity is measured for the liquid spray nozzle of Comparative Example 1 of the present invention. [Figure 15] FIG. 11 is a diagram showing measurement positions and spray distribution when spray intensity is measured for the liquid spray nozzle of Example 2 of the present invention. [Figure 16] FIG. 13 is a diagram showing measurement positions and spray distribution when spray intensity is measured for a liquid spray nozzle of Comparative Example 2 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] FIG. 1 shows a schematic configuration of a first embodiment of a liquid spray nozzle of the present invention.

[0024] As shown in the figure, the liquid spray nozzle 10 in the first embodiment comprises a nozzle main body 10a, a thin tube insertion section 10b formed integrally on the liquid supply side, which is the base end of the nozzle main body 10a, a thin, flexible tube section 10c formed integrally on the tip side of the nozzle main body 10a, and a load eccentric section 10d formed integrally at the tip of the flexible tube section 10c.

[0025] The thin tube insertion section 10b, the nozzle body 10a, and the flexible tube section 10c are each provided with an internal guide passage (not shown) that communicates with one another, and the tip of the flexible tube section 10c opens through a nozzle hole (not shown) that communicates with this internal guide passage. The nozzle body 10a is integrally formed with a guide fin 10e.

[0026] In this embodiment, the liquid spray nozzle 10 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 10 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it has flexibility. The nozzle body 10a, the thin tube insertion part 10b, and the flexible tube part 10c correspond to the nozzle part of the present invention.

[0027] One end of a thin tube 11 is inserted into the thin tube insertion portion 10b of the nozzle body 10a. The other end of the thin tube 11 is inserted into one end of a pipe joint 12, and a liquid supply hose 13 is inserted into the other end of the pipe joint 12.

[0028] In this embodiment, the thin tube 11 and the pipe joint 12 are made of a synthetic resin material, but they may be made of a flexible material such as silicone rubber, like the liquid spray nozzle 10. Also, the liquid spray nozzle 10, the thin tube 11 and the pipe joint 12 may be integrally formed of a flexible material.

[0029] In this embodiment, the flexible tube portion 10c has an inner diameter of 1 mm to 3 mm. The capillary 11 has an inner diameter of 1 mm to 3 mm. The inner diameter of the flexible tube portion 10c controls the diameter (particle size) of the sprayed droplets. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0030] The load eccentric portion 10d is provided at the tip of the flexible tube portion 10c and is for applying a load in the off-axis direction of the flexible tube portion 10c. When water is sprayed from the nozzle hole opened at the tip of the flexible tube portion 10c, the flexible tube portion 10c vibrates by itself due to the supply pressure of the water. However, since the load eccentric portion 10d is configured to apply a load in the off-axis direction of the flexible tube portion 10c, the flexible tube portion 10c vibrates by itself like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 10 sprays while vibrating by itself like a pendulum in the eccentric direction of the load eccentric portion 10d. Since the liquid spray nozzle 10 can spray at a low supply pressure, the durability of the liquid spray nozzle 10 is improved and energy saving can be achieved.

[0031] In this embodiment, the load eccentric portion 10d is made of the same material as the flexible tube portion 10c and is configured as a substantially rectangular parallelepiped protruding portion that protrudes only in one direction off-axis from the flexible tube portion 10c. The load eccentric portion 10d may be configured as a separate member fixed to the flexible tube portion 10c.

[0032] The guide fin 10e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 10c and prevents interference with nearby components. The nozzle main body section 10a has a flattened shape as a whole because the guide fin 10e is integrally formed with it.

[0033] In this embodiment, the nozzle body 10a with the guide fins 10e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 10a with the guide fins 10e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion portion 10b, and gradually becomes thinner as it extends from there toward the tip end, and at the portion where the flexible tube portion 10c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube portion 10c.

[0034] The nozzle body 10 with the guide fin 10e is a thin wedge shape formed in a line symmetrical shape with respect to the axial direction of the flexible tube portion 10c, so that it is easy to bend in the thickness direction of the wedge shape and difficult to bend in the width direction. Therefore, the nozzle body 10 with the guide fin 10e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 10 are provided to spray water, it is possible to control the vibration direction to match the shape of the water spray area to prevent interference with adjacent liquid spray nozzles and failure to obtain uniform spray. The shape of the nozzle body 10 with the guide fin 10e does not have to be line symmetrical, and may be asymmetric, twisted, or wedge-shaped with reversed thickness and width dimensions.

[0035] Next, the effects of the liquid spray nozzle 10 of this embodiment will be described.

[0036] First, the self-excited vibration of the flexible tube portion 10c will be described with reference to FIG.

[0037] When liquid is jetted out from the tip opening of the flexible tube portion 10c, a reaction force of the momentum of the jetted liquid acts inside the tube through the tip opening. More specifically, as shown in FIG. 2(A), in the initial state, the reaction force of the jet acts along the Y axis on the tip of the flexible tube portion 10c, acting as a compressive pressure on the flexible tube portion 10c. The flexible tube portion 10c resists this reaction force with its own rigidity, but since the flexible tube portion 10c is made of a material with low rigidity, it easily buckles, resulting in the state shown in FIG. 2(B). Note that the inside of the tube is not shown in FIGS. 2(B) to (D).

[0038] Since the tip of the flexible tube portion 10c is a free end, this buckling is a buckling with one end fixed. In the state shown in FIG. 2(B), the flexible tube portion 10c (shown by a thick dotted line) has a first bending point on the way from the fixed end to the tip opening and bends at an angle θ1 in the negative direction of the X-axis, and then a second bending point occurs at the tip opening side and bends at an angle θ2, and the tip opening faces the positive direction of the X-axis from the second bending point and has an inclination of an angle θ3 with respect to the Y-axis. Therefore, the reaction force of the jet generates a horizontal component of sinθ3 in the negative direction of the X-axis at the tip opening, which acts as a force to move the tip opening in the negative direction of the X-axis. Since the direction of the liquid flowing inside changes by an angle θ2 at the second bending point, a centrifugal force acts on the flexible tube portion 10c, which receives a horizontal component of sinθ2 of the mass momentum of the liquid, and this force also acts as a force to move the part of the tip opening of the flexible tube portion 10c in the negative direction of the X-axis. On the other hand, at the first bending point, centrifugal force is generated by changing the direction of the liquid by angle θ1, and the sin θ1 of the mass momentum becomes a horizontal component force, but the acting direction is the positive direction of the X-axis. In other words, the first bending point acts in the opposite direction to the moving direction of the tip opening. If the subsequent movement of the flexible tube portion 10c is plotted with the center line, the reaction force, and its component force, it will be as shown in Figures 2(B) to (D).

[0039] As mentioned above, when a force (resistance) in the opposite direction to the direction of movement is applied, the vibration will continue. Because this is not a forced vibration, this type of sustained vibration is called self-excited vibration.

[0040] Next, the function of the nozzle body 10a with the guide fins 10e and the load eccentric portion 10d will be described. Figure 3 is a diagram for explaining the attachment direction of the nozzle body 10a with the guide fins 10e and the load eccentric portion 10d and the movement direction of the liquid spray nozzle 10.

[0041] First, regarding the action of the nozzle body 10a with the guide fins 10e, when the liquid spray nozzle 10 is attached so that the thickness direction of the nozzle body 10a with the wedge-shaped guide fins 10e is the X-axis direction and the width direction is within the YZ plane or a plane parallel thereto, as shown in Fig. 3, the nozzle body 10a is easily bent in the X-axis direction and is easily flexible within the XY plane or a plane parallel thereto, but is difficult to bend within the YZ plane or a plane parallel thereto. In addition, the flexible tube 10c provided at the tip of the nozzle body 10a also moves in the same manner as the nozzle body 10a.

[0042] In addition, as shown in FIG. 3, since the load eccentric portion 10d is configured to apply a load in the off-axis direction, which is the Z-axis direction (in the YZ plane or in a plane parallel thereto), the flexible tube portion 10c receives an excitation force in the Z-axis direction as well, and vibrates in the Z-axis direction while vibrating in the X-axis direction. This allows the spray area to have width in the Z-axis direction as well, making it possible to control the spray area to a circular shape with a low supply pressure. In this case, the spray intensity (amount of spray per unit time) is greatly reduced. Since the inner diameter of the flexible tube portion 10c is constant, the spray intensity can be greatly reduced while maintaining the diameter of the sprayed droplets at a desired value.

[0043] According to the liquid spray nozzle 10 of this embodiment, it has been confirmed that the supply pressure (operating pressure) is 0.18 MPa (0.2 MPa for the conventional nozzle), the spray intensity at a height of 2 m is 1 mm / h or less (20 mm / h or more for the conventional nozzle), and the shape of the spray area is a perfect circle (ellipse or strip shape for the conventional nozzle) compared to the conventional liquid spray nozzle not having the load eccentric part 10d (see Example 1 and Comparative Example 1 described later). Therefore, the liquid spray nozzle 10 of this embodiment can self-oscillate like a pendulum at a lower supply pressure compared to the conventional liquid spray nozzle, and can significantly reduce the spray intensity while maintaining the diameter of the sprayed droplets at a desired value, and can control the spray area to a circular shape at a low supply pressure. Spraying at a low supply pressure can improve durability and save energy.

[0044] FIG. 4 shows a schematic configuration of a second embodiment of a liquid spray nozzle according to the present invention.

[0045] As shown in the figure, the liquid spray nozzle 110 of the second embodiment includes a nozzle body 110a, a thin tube insertion section 110b formed integrally with the nozzle body 110a on the liquid supply side, which is the base end of the nozzle body 110a, a thin flexible tube section 110c formed integrally with the tip end of the nozzle body 110a, and a load eccentric section 110d formed integrally with the tip of the flexible tube section 110c. The load eccentric section 110d in the liquid spray nozzle 110 of this embodiment is formed slightly closer to the base end side (liquid supply side) than the position of the load eccentric section 10d in the liquid spray nozzle 10 of the first embodiment.

[0046] The thin tube insertion section 110b, the nozzle body 110a, and the flexible tube section 110c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 110c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body 110a has a flat shape, and the guide fins 110e are formed integrally with this nozzle body 110a.

[0047] In this embodiment, the liquid spray nozzle 110 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 110 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, has flexibility. The nozzle main body 110a, the thin tube insertion part 110b, and the flexible tube part 110c correspond to the nozzle part of the present invention.

[0048] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 110b of nozzle body 110a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0049] In this embodiment, the flexible tube portion 110c has an inner diameter of 1 mm to 3 mm. The inner diameter of the flexible tube portion 110c controls the diameter of the sprayed droplets. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0050] The load eccentric portion 110d is provided slightly behind the tip of the flexible tube portion 110c and is for applying a load in the off-axis direction of the flexible tube portion 110c. When water is sprayed from the nozzle hole opened at the tip of the flexible tube portion 110c, the flexible tube portion 110c vibrates due to the supply pressure of the water. However, since the load eccentric portion 110d is configured to apply a load in the off-axis direction of the flexible tube portion 110c, the flexible tube portion 110c vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 110 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 110d. Since the liquid spray nozzle 110 can spray at a low supply pressure, the durability of the liquid spray nozzle 110 is improved and energy saving can be achieved.

[0051] In this embodiment, the load eccentric portion 110d is made of the same material as the flexible tube portion 110c and is configured as a substantially rectangular parallelepiped protruding portion protruding only in one direction off-axis from the flexible tube portion 110c. The load eccentric portion 110d may be configured as a separate member fixed to the flexible tube portion 110c.

[0052] The guide fin 110e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 110c and prevents interference with nearby components, and the nozzle main body section 110a has a flattened shape as a whole because the guide fin 110e is integrally formed with it.

[0053] In this embodiment, the nozzle body 110a with the guide fins 110e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 110a with the guide fins 110e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 110b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 110c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 110c.

[0054] The nozzle body 110 with the guide fin 110e is a thin wedge shape formed in a line symmetric shape with respect to the axial direction of the flexible tube portion 110c, so that it is easy to bend in the thickness direction of the wedge shape and difficult to bend in the width direction. Therefore, the nozzle body 110 with the guide fin 110e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 110 are provided to spray water, it is possible to control the vibration direction to match the shape of the water spray area to prevent interference with adjacent liquid spray nozzles and failure to obtain uniform spray. Note that the shape of the nozzle body 110 with the guide fin 110e does not have to be line symmetric, and may be asymmetric, twisted, or wedge-shaped with reversed thickness and width dimensions.

[0055] According to the liquid spray nozzle 110 of this embodiment, the action of the nozzle body 110a with the guide fins 110e and the action of the load eccentric part 110d applying a load in the off-axis direction allow the spray area to be controlled to a circular shape with a low supply pressure, and the spray intensity is also significantly reduced. Since the inner diameter of the flexible tube part 110c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0056] FIG. 5 shows a schematic configuration of a third embodiment of a liquid spray nozzle according to the present invention.

[0057] As shown in the figure, the liquid spray nozzle 210 in the third embodiment comprises a nozzle main body 210a, a thin tube insertion section 210b formed integrally on the liquid supply side, which is the base end of the nozzle main body 210a, a thin-diameter flexible tube section 210c formed integrally on the tip side of the nozzle main body 210a, and a load eccentric section 210d formed integrally at the tip end of the flexible tube section 210c.

[0058] The thin tube insertion section 210b, the nozzle body 210a, and the flexible tube section 210c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 210c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body 210a has a flat shape, and the guide fins 210e are formed integrally with this nozzle body 210a.

[0059] In this embodiment, the liquid spray nozzle 210 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 210 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, has flexibility. The nozzle main body 210a, the thin tube insertion part 210b, and the flexible tube part 210c correspond to the nozzle part of the present invention.

[0060] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 210b of nozzle body 210a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0061] In this embodiment, the flexible tube portion 210c has an inner diameter of 1 mm to 3 mm. The inner diameter of the flexible tube portion 210c controls the diameter of the sprayed droplets. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0062] The load eccentric portion 210d is provided at the tip of the flexible tube portion 210c and is for applying a load in the off-axis direction of the flexible tube portion 210c. When water is sprayed from a nozzle hole opened at the tip of the flexible tube portion 210c, the flexible tube portion 210c vibrates due to the supply pressure of the water. However, since the load eccentric portion 210d is configured to apply a load in the off-axis direction of the flexible tube portion 210c, the flexible tube portion 210c self-oscillates like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 210 sprays while self-oscillating like a pendulum in the eccentric direction of the load eccentric portion 210d. Since the liquid spray nozzle 210 can spray at a low supply pressure, the durability of the liquid spray nozzle 210 is improved and energy saving can be contributed.

[0063] In this embodiment, the load eccentric portion 210d is formed of a member of the same material as the flexible tube portion 210c and is integral with the flexible tube portion 210c. The first protrusion 210d is a substantially rectangular parallelepiped protruding portion protruding in one direction off-axis from the flexible tube portion 210c and in the opposite direction. 1 and the second protrusion 210d 2 The load eccentric portion 210d may be fixed to the flexible tube portion 210c and may be formed as a separate member from the flexible tube portion 210c.

[0064] The guide fin 210e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 210c and prevents interference with nearby components, and the nozzle main body section 210a has an overall flattened shape due to the guide fin 210e being integrally formed therewith.

[0065] In this embodiment, the nozzle body 210a with the guide fins 210e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 210a with the guide fins 210e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 210b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 210c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 210c.

[0066] The nozzle body 210 with the guide fin 210e is a thin wedge shape formed in a line symmetrical shape with respect to the axial direction of the flexible tube portion 210c, and therefore has a property of being easily bent in the thickness direction of the wedge shape and being difficult to bend in the width direction. Therefore, the nozzle body 210 with the guide fin 210e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 210 are provided for spraying water, it is possible to control the vibration direction of the nozzles to match the shape of the water spray area in order to prevent interference with the adjacent liquid spray nozzles from occurring and making it impossible to obtain a uniform spray. The shape of the nozzle body 210 with the guide fin 210e does not have to be line symmetrical, and may be asymmetric, twisted, or a wedge shape with reversed thickness and width dimensions.

[0067] According to the liquid spray nozzle 210 of this embodiment, the action of the nozzle body 210a with the guide fins 210e and the action of the load eccentric part 210d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 210c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0068] FIG. 6 shows a schematic configuration of a fourth embodiment of the liquid spray nozzle of the present invention.

[0069] As shown in the figure, the liquid spray nozzle 310 of the fourth embodiment includes a nozzle body 310a, a thin tube insertion section 310b formed integrally with the nozzle body 310a on the liquid supply side, which is the base end of the nozzle body 310a, a thin flexible tube section 310c formed integrally with the tip end of the nozzle body 310a, and a load eccentric section 310d formed integrally with the tip end of the flexible tube section 310c. The load eccentric section 310d in the liquid spray nozzle 310 of this embodiment is formed slightly closer to the base end side (liquid supply side) than the position of the load eccentric section 210d in the liquid spray nozzle 210 of the third embodiment.

[0070] The thin tube insertion section 310b, the nozzle body 310a, and the flexible tube section 310c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 310c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body section 310a has a flat shape, and the guide fins 310e are formed integrally with this nozzle body section 310a.

[0071] In this embodiment, the liquid spray nozzle 310 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 310 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, has flexibility. The nozzle main body 310a, the thin tube insertion part 310b, and the flexible tube part 310c correspond to the nozzle part of the present invention.

[0072] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 310b of nozzle body 310a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0073] In this embodiment, the flexible tube portion 310c has an inner diameter of 1 mm to 3 mm. The diameter of the sprayed droplets is controlled by the inner diameter of the flexible tube portion 310c. That is, the smaller the inner diameter, the smaller the spray of droplets that can be achieved, and the larger the inner diameter, the larger the spray of droplets that can be achieved.

[0074] The load eccentric portion 310d is provided slightly behind the tip of the flexible tube portion 310c and is for applying a load in the off-axis direction of the flexible tube portion 310c. When water is sprayed from the nozzle hole opened at the tip of the flexible tube portion 310c, the flexible tube portion 310c vibrates due to the supply pressure of the water. However, since the load eccentric portion 310d is configured to apply a load in the off-axis direction of the flexible tube portion 310c, the flexible tube portion 310c vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 310 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 310d. Since the liquid spray nozzle 310 can spray at a low supply pressure, the durability of the liquid spray nozzle 310 is improved and energy saving can be achieved.

[0075] In this embodiment, the load eccentric portion 310d is formed of a member of the same material as the flexible tube portion 310c and is integral with the flexible tube portion 310c. The load eccentric portion 310d is formed of a first protrusion 310d having a substantially rectangular parallelepiped shape protruding in one direction off-axis from the flexible tube portion 310c and in the opposite direction. 1 and the second protrusion 310d 2 The first protrusion 310d 1 is the second protrusion 310d 2 The load of the load eccentric portion 310d is larger than that of the first protrusion 310d. 1 The load eccentric portion 310d may be fixed to the flexible tube portion 310c and may be formed as a separate member from the flexible tube portion 310c.

[0076] The guide fin 310e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 310c and prevents interference with nearby components, and the nozzle main body section 310a has an overall flattened shape because the guide fin 310e is integrally formed with it.

[0077] In this embodiment, the nozzle body 310a with the guide fins 310e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 310a with the guide fins 310e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 310b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 310c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 310c.

[0078] The nozzle body 310 with the guide fin 310e is a thin wedge shape formed in a line symmetric shape with respect to the axial direction of the flexible tube portion 310c, so that it is easy to bend in the thickness direction of the wedge shape and difficult to bend in the width direction. Therefore, the nozzle body 310 with the guide fin 310e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 310 are provided to spray water, it is possible to control the vibration direction to match the shape of the water spray area to prevent interference with adjacent liquid spray nozzles and failure to obtain uniform spray. The shape of the nozzle body 310 with the guide fin 310e does not have to be line symmetric, and may be asymmetric, twisted, or wedge-shaped with reversed thickness and width dimensions.

[0079] According to the liquid spray nozzle 310 of this embodiment, the action of the nozzle body 310a with the guide fin 310e and the action of the load eccentric part 310d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 310c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0080] FIG. 7 shows a schematic configuration of a liquid spray nozzle according to a fifth embodiment of the present invention.

[0081] As shown in the figure, the liquid spray nozzle 410 in the fifth embodiment comprises a nozzle main body 410a, a thin tube insertion section 410b formed integrally on the liquid supply side, which is the base end of the nozzle main body 410a, a thin-diameter flexible tube section 410c formed integrally on the tip side of the nozzle main body 410a, and a load eccentric section 410d formed integrally at the tip end of the flexible tube section 410c.

[0082] The thin tube insertion section 410b, the nozzle body 410a, and the flexible tube section 410c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 410c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body 410a has a flat shape, and the guide fins 410e are formed integrally with the nozzle body 410a.

[0083] In this embodiment, the liquid spray nozzle 410 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 410 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it has flexibility. The nozzle main body 410a, the thin tube insertion part 410b, and the flexible tube part 410c correspond to the nozzle part of the present invention.

[0084] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 410b of nozzle body 410a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0085] In this embodiment, the flexible tube portion 410c has an inner diameter of 1 mm to 3 mm. The inner diameter of the flexible tube portion 410c controls the diameter of the sprayed droplets. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0086] The load eccentric portion 410d is provided at the tip of the flexible tube portion 410c and is for applying a load in the off-axis direction of the flexible tube portion 410c. When water is sprayed from a nozzle hole opened at the tip of the flexible tube portion 410c, the flexible tube portion 410c vibrates due to the supply pressure of the water. However, since the load eccentric portion 410d is configured to apply a load in the off-axis direction of the flexible tube portion 410c, the flexible tube portion 410c vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 410 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 410d. Since the liquid spray nozzle 410 can spray at a low supply pressure, the durability of the liquid spray nozzle 410 is improved and energy saving can be contributed.

[0087] In this embodiment, the load eccentric portion 410d is made of the same material as the flexible tube portion 410c and is configured as a substantially spherical protrusion protruding only in one direction off-axis from the flexible tube portion 410c. The load eccentric portion 410d may be configured as a separate member from the flexible tube portion 410c and fixed to the flexible tube portion 410c.

[0088] The guide fin 410e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 410c and prevents interference with nearby components, and the nozzle main body section 410a has an overall flattened shape due to the guide fin 410e being integrally formed therewith.

[0089] In this embodiment, the nozzle body 410a with the guide fins 410e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 410a with the guide fins 410e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 410b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 410c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 410c.

[0090] The nozzle body 410 with the guide fin 410e is a thin wedge shape formed in a line symmetrical shape with respect to the axial direction of the flexible tube portion 410c, and therefore has a property of being easily bent in the thickness direction of the wedge shape and being difficult to bend in the width direction. Therefore, the nozzle body 410 with the guide fin 410e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 410 are provided to spray water, it is possible to control the vibration direction of the nozzles to match the shape of the water spray area in order to prevent interference with adjacent liquid spray nozzles from occurring and making it impossible to obtain uniform spray. The shape of the nozzle body 410 with the guide fin 410e does not have to be line symmetrical, and may be asymmetric, twisted, or a wedge shape with reversed thickness and width dimensions.

[0091] According to the liquid spray nozzle 410 of this embodiment, the action of the nozzle body 410a with the guide fin 410e and the action of the load eccentric part 410d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 410c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0092] FIG. 8 shows a schematic configuration of a sixth embodiment of the liquid spray nozzle of the present invention.

[0093] As shown in the figure, the liquid spray nozzle 510 in the sixth embodiment comprises a nozzle main body 510a, a thin tube insertion section 510b formed integrally on the liquid supply side, which is the base end of the nozzle main body 510a, a thin-diameter, flexible tube section 510c formed integrally on the tip side of the nozzle main body 510a, and a load eccentric section 510d formed integrally at the tip end of the flexible tube section 510c.

[0094] The thin tube insertion section 510b, the nozzle body 510a, and the flexible tube section 510c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 510c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body section 510a has a flat shape, and the guide fins 510e are formed integrally with this nozzle body section 510a.

[0095] In this embodiment, the liquid spray nozzle 510 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 510 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it has flexibility. The nozzle main body 510a, the thin tube insertion part 510b, and the flexible tube part 510c correspond to the nozzle part of the present invention.

[0096] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 510b of nozzle body 510a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0097] In this embodiment, the flexible tube portion 510c has an inner diameter of 1 mm to 3 mm. The diameter of the sprayed droplets is controlled by the inner diameter of the flexible tube portion 510c. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0098] The load eccentric portion 510d is provided at the tip of the flexible tube portion 510c and is for applying a load in the off-axis direction of the flexible tube portion 510c. When water is sprayed from a nozzle hole opened at the tip of the flexible tube portion 510c, the flexible tube portion 510c vibrates due to the supply pressure of the water. However, since the load eccentric portion 510d is configured to apply a load in the off-axis direction of the flexible tube portion 510c, the flexible tube portion 510c vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 510 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 510d. Since the liquid spray nozzle 510 can spray at a low supply pressure, the durability of the liquid spray nozzle 510 is improved and energy saving can be contributed.

[0099] In this embodiment, the load eccentric portion 510d is formed of a member of the same material as the flexible tube portion 510c and is configured as a protruding portion having a generally inclined semi-cylindrical shape (a semi-cylindrical shape whose height gradually increases toward the tip) protruding only in one direction off the axis from the flexible tube portion 510c. The load eccentric portion 510d may be configured as a separate member from the flexible tube portion 510c fixed to the flexible tube portion 510c.

[0100] The guide fin 510e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 510c and prevents interference with nearby components, and the nozzle main body section 510a has an overall flattened shape due to the guide fin 510e being integrally formed therewith.

[0101] In this embodiment, the nozzle body 510a with the guide fins 510e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 510a with the guide fins 510e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 510b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 510c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 510c.

[0102] The nozzle body 510 with the guide fin 510e is a thin wedge shape formed in a line symmetric shape with respect to the axial direction of the flexible tube part 510c, so that it is easy to bend in the thickness direction of the wedge shape and difficult to bend in the width direction. Therefore, the nozzle body 510 with the guide fin 510e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 510 are provided to spray water, it is possible to control the vibration direction to match the shape of the water spray area to prevent interference with adjacent liquid spray nozzles and failure to obtain uniform spray. The shape of the nozzle body 510 with the guide fin 510e does not have to be line symmetric, and may be asymmetric, twisted, or a wedge shape with reversed thickness and width dimensions.

[0103] According to the liquid spray nozzle 510 of this embodiment, the action of the nozzle body 510a with the guide fin 510e and the action of the load eccentric part 510d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 510c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0104] FIG. 9 is a schematic diagram showing the configuration of a seventh embodiment of a liquid spray nozzle according to the present invention.

[0105] As shown in the figure, the liquid spray nozzle 610 in the seventh embodiment comprises a nozzle main body 610a, a thin tube insertion portion 610b formed integrally on the liquid supply side, which is the base end of the nozzle main body 610a, a thin-diameter, flexible tube portion 610c formed integrally on the tip side of the nozzle main body 610a, and a load eccentric portion 610d formed integrally at the tip end of the flexible tube portion 610c.

[0106] The thin tube insertion section 610b, the nozzle body 610a, and the flexible tube section 610c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 610c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body section 610a has a flat shape, and the guide fins 610e are formed integrally with this nozzle body section 610a.

[0107] In this embodiment, the liquid spray nozzle 610 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 610 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it has flexibility. The nozzle main body 610a, the thin tube insertion part 610b, and the flexible tube part 610c correspond to the nozzle part of the present invention.

[0108] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 610b of nozzle body 610a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0109] In this embodiment, the flexible tube portion 610c has an inner diameter of 1 mm to 3 mm. The inner diameter of the flexible tube portion 610c controls the diameter of the sprayed droplets. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0110] The load eccentric portion 610d is provided at the tip of the flexible tube portion 610c and is for applying a load in the off-axis direction of the flexible tube portion 610c. When water is sprayed from the nozzle hole opened at the tip of the flexible tube portion 610c, the flexible tube portion 610c vibrates due to the supply pressure of the water. However, since the load eccentric portion 610d is configured to apply a load in the off-axis direction of the flexible tube portion 610c, the flexible tube portion 610c self-oscillates like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 610 sprays while self-oscillating like a pendulum in the eccentric direction of the load eccentric portion 610d. Since the liquid spray nozzle 610 can spray at a low supply pressure, the durability of the liquid spray nozzle 610 is improved and energy saving can be contributed.

[0111] In this embodiment, the load eccentric portion 610d is formed of a member of the same material as the flexible tube portion 610c and is configured as a protruding portion having a substantially semi-triangular prism shape protruding only in one direction off-axis from the flexible tube portion 610c. The load eccentric portion 610d may be configured as a separate member from the flexible tube portion 610c and fixed to the flexible tube portion 610c.

[0112] The guide fin 610e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 610c and prevents interference with nearby components, and the nozzle main body section 610a has an overall flattened shape due to the guide fin 610e being integrally formed therewith.

[0113] In this embodiment, the nozzle body 610a with the guide fins 610e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 610a with the guide fins 610e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 610b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 610c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 610c.

[0114] The nozzle body 610 with the guide fin 610e is a thin wedge shape formed in a line symmetrical shape with respect to the axial direction of the flexible tube portion 610c, and therefore has a property of being easily bent in the thickness direction of the wedge shape and being difficult to bend in the width direction. Therefore, the nozzle body 610 with the guide fin 610e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 610 are provided for spraying water, it is possible to control the vibration direction of the nozzles to match the shape of the water spray area in order to prevent interference with the adjacent liquid spray nozzles from occurring and making it impossible to obtain a uniform spray. The shape of the nozzle body 610 with the guide fin 610e does not have to be line symmetrical, and may be asymmetric, twisted, or a wedge shape with reversed thickness and width dimensions.

[0115] According to the liquid spray nozzle 610 of this embodiment, the action of the nozzle body 610a with the guide fin 610e and the action of the load eccentric part 610d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 610c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0116] FIG. 10 is a schematic diagram showing the configuration of an eighth embodiment of a liquid spray nozzle according to the present invention.

[0117] As shown in the figure, the liquid spray nozzle 710 in the eighth embodiment comprises a nozzle main body 710a, a thin tube insertion portion 710b formed integrally on the liquid supply side, which is the base end of the nozzle main body 710a, a thin, flexible tube portion 710c formed integrally on the tip side of the nozzle main body 710a, and a load eccentric portion 710d formed integrally at the tip end of the flexible tube portion 710c.

[0118] The thin tube insertion section 710b, the nozzle body 710a, and the flexible tube section 710c are each provided with an internal guideway (not shown) that communicates with one another, and the tip of the flexible tube section 710c opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body section 710a has a flat shape, and the guide fins 710e are formed integrally with this nozzle body section 710a.

[0119] In this embodiment, the liquid spray nozzle 710 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 710 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, has flexibility. The nozzle main body 710a, the thin tube insertion part 710b, and the flexible tube part 710c correspond to the nozzle part of the present invention.

[0120] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 710b of nozzle body 710a in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0121] In this embodiment, the flexible tube portion 710c has an inner diameter of 1 mm to 3 mm. The diameter of the sprayed droplets is controlled by the inner diameter of the flexible tube portion 710c. That is, the smaller the inner diameter, the smaller the spray of droplets that can be achieved, and the larger the inner diameter, the larger the spray of droplets that can be achieved.

[0122] The load eccentric portion 710d is provided at the tip of the flexible tube portion 710c and is for applying a load in the off-axis direction of the flexible tube portion 710c. When water is sprayed from a nozzle hole opened at the tip of the flexible tube portion 710c, the flexible tube portion 710c vibrates due to the supply pressure of the water. However, since the load eccentric portion 710d is configured to apply a load in the off-axis direction of the flexible tube portion 710c, the flexible tube portion 710c vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 710 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 710d. Since the liquid spray nozzle 710 can spray at a low supply pressure, the durability of the liquid spray nozzle 710 is improved and energy saving can be achieved.

[0123] In this embodiment, the load eccentric portion 710d is formed of a member of the same material as the flexible tube portion 710c and is integrally formed with the flexible tube portion 710c. The first protrusion 710d is substantially triangular prism-shaped and protrudes from the flexible tube portion 710c in one direction off-axis and in the opposite direction. 1 and the second protrusion 710d 2 The first protrusion 710d 1 is the second protrusion 710d 2The load of the load eccentric portion 710d is larger than that of the first protrusion 710d. 1 The load eccentric portion 710d may be fixed to the flexible tube portion 710c and may be formed as a separate member from the flexible tube portion 710c.

[0124] The guide fin 710e is a thin plate-like tube vibration control section that limits the vibration direction of the flexible tube section 710c and prevents interference with nearby components, and the nozzle main body section 710a has an overall flattened shape due to the guide fin 710e being integrally formed therewith.

[0125] In this embodiment, the nozzle body 710a with the guide fins 710e has a planar shape that is an elongated pentagon. The side shape of the nozzle body 710a with the guide fins 710e has a thickness at the base end that is approximately the same as the outer diameter of the thin tube insertion part 710b, and gradually becomes thinner as it extends from there toward the tip end, and at the part where the flexible tube part 710c protrudes, it is formed into a wedge shape with a thickness approximately the same as the outer diameter of the flexible tube part 710c.

[0126] The nozzle body 710 with the guide fin 710e is a thin wedge shape formed in a line symmetric shape with respect to the axial direction of the flexible tube portion 710c, so that it is easy to bend in the thickness direction of the wedge shape and difficult to bend in the width direction. Therefore, the nozzle body 710 with the guide fin 710e has a function of suppressing vibration in its width direction, and when multiple liquid spray nozzles 710 are provided to spray water, it is possible to control the vibration direction to match the shape of the water spray area to prevent interference with adjacent liquid spray nozzles and failure to obtain uniform spray. Note that the shape of the nozzle body 710 with the guide fin 710e does not have to be line symmetric, and may be asymmetric, twisted, or wedge-shaped with reversed thickness and width dimensions.

[0127] According to the liquid spray nozzle 710 of this embodiment, the action of the nozzle body 710a with the guide fin 710e and the action of the load eccentric part 710d applying a load in the off-axis direction can control the spray area to a circular shape with a low supply pressure, and the spray intensity can be significantly reduced. Since the inner diameter of the flexible tube part 710c is constant, the spray intensity can be significantly reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0128] FIG. 11 is a schematic diagram showing the configuration of a ninth embodiment of a liquid spray nozzle according to the present invention.

[0129] As shown in the figure, the liquid spray nozzle 810 in the ninth embodiment comprises a rod-shaped nozzle body 810a having the same diameter from the tip to the base end, a capillary insertion portion 810b formed integrally with the liquid supply side, which is the base end, of the nozzle body 810a, and a load eccentric portion 810d formed integrally with the tip end of the nozzle body 810a.

[0130] The nozzle body 810a and the thin tube insertion section 810b are each provided with an internal guideway 810f that communicates with each other, and the tip of the nozzle body 810a opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body 810a is cylindrical rather than flat, and is not provided with guide fins.

[0131] In this embodiment, the liquid spray nozzle 810 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 810 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, has flexibility. The nozzle main body 810a and the thin tube insertion part 810b correspond to the nozzle part of the present invention.

[0132] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 810b in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0133] In this embodiment, the inner diameter of the inner conduit 810f is set to 1 mm to 8 mm. The diameter of the sprayed droplets is controlled by the inner diameter of the inner conduit 810f. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0134] The load eccentric portion 810d is provided at the tip of the nozzle body 810a and is for applying a load in the off-axis direction of the nozzle body 810a. When water is ejected from the nozzle hole opened at the tip of the nozzle body 810a, the nozzle body 810a vibrates due to the supply pressure of the water. However, since the load eccentric portion 810d is configured to apply a load in the off-axis direction of the nozzle body 810a, the nozzle body 810a vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 810 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 810d. Since the liquid spray nozzle 810 can be sprayed at a low supply pressure, the durability of the liquid spray nozzle 810 is improved and energy saving can be contributed.

[0135] In this embodiment, the load eccentric portion 810d is formed of a member of the same material as the nozzle main body 810a and is configured as a substantially rectangular parallelepiped protruding portion that protrudes only in one direction off-axis from the nozzle main body 810a. The load eccentric portion 810d may be configured as a separate member from the nozzle main body 810a and fixed to the nozzle main body 810a.

[0136] According to the liquid spray nozzle 810 of this embodiment, the nozzle body 810a has a rod shape of the same diameter, so the rigidity is lower, and self-excited vibration in the up, down, left and right directions is more likely to occur. The action of this nozzle body 810a and the action of applying a load in the off-axis direction of the load eccentric part 810d make it possible to control the spray area to a circular shape at a low supply pressure, and the spray intensity is also reduced. It is considered that the reason why the spray area is circular is that there is no guide fin, and that low supply pressure causes low-frequency vibration, and the tip trajectory is randomly circular when sprayed. In addition, since the inner diameter of the internal guide 810f is constant, the spray intensity can be reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0137] FIG. 12 is a schematic diagram showing the configuration of a tenth embodiment of a liquid spray nozzle according to the present invention.

[0138] As shown in the figure, the liquid spray nozzle 910 in the tenth embodiment comprises a nozzle body 910a having a conical tapered shape whose diameter decreases toward the tip, a capillary insertion portion 910b formed integrally with the liquid supply side, which is the base end of the nozzle body 910a, and a load eccentric portion 910d formed integrally with the tip end of the nozzle body 910a.

[0139] The nozzle body 910a and the thin tube insertion part 910b are each provided with an internal guideway 910f that communicates with each other, and the tip of the nozzle body 910a opens through a nozzle hole (not shown) that communicates with this internal guideway. The nozzle body 910a is not flat but has a conical tapered shape, and is not provided with a guide fin.

[0140] In this embodiment, the liquid spray nozzle 910 is formed of a flexible material such as silicone rubber. The material of the liquid spray nozzle 910 is not limited to silicone rubber, and may be polyvinyl chloride, polyethylene, polypropylene, polyurethane, etc. In short, it is sufficient if it is flexible, that is, pliable. The nozzle main body 910a and the thin tube insertion part 910b correspond to the nozzle part of the present invention.

[0141] Although not shown, one end of a thin tube is inserted into thin tube insertion portion 910b in the same manner as in the first embodiment. The other end of this thin tube is inserted into one end of a pipe joint, and a liquid supply hose is inserted into the other end of this pipe joint.

[0142] In this embodiment, the inner diameter of the inner conduit 910f is set to 0.5 mm to 3 mm. The diameter of the sprayed droplets is controlled by the inner diameter of the inner conduit 910f. That is, the smaller the inner diameter, the smaller the spray diameter of the droplets that can be achieved, and the larger the inner diameter, the larger the spray diameter of the droplets that can be achieved.

[0143] The load eccentric portion 910d is provided at the tip of the nozzle body 910a and is for applying a load in the off-axis direction of the nozzle body 910a. When water is ejected from the nozzle hole opened at the tip of the nozzle body 910a, the nozzle body 910a vibrates due to the supply pressure of the water. However, since the load eccentric portion 910d is configured to apply a load in the off-axis direction of the nozzle body 910a, the nozzle body 910a vibrates self-excited like a pendulum at a lower supply pressure. That is, the liquid spray nozzle 910 sprays while vibrating self-excited like a pendulum in the eccentric direction of the load eccentric portion 810d. Since the liquid spray nozzle 910 can spray at a low supply pressure, the durability of the liquid spray nozzle 810 is improved and energy saving can be achieved.

[0144] In this embodiment, the load eccentric portion 910d is formed of a member of the same material as the nozzle main body 910a and is configured as a substantially rectangular parallelepiped protruding portion that protrudes only in one direction off-axis from the nozzle main body 910a. The load eccentric portion 910d may be configured as a separate member from the nozzle main body 910a and fixed to the nozzle main body 910a.

[0145] According to the liquid spray nozzle 910 of this embodiment, the nozzle body 910a has a conical tapered shape, so that the rigidity is lowered and self-excited vibration in the up, down, left and right directions is easily generated. The action of this nozzle body 910a and the action of applying a load in the off-axis direction of the load eccentric part 910d allow the spray area to be controlled to a circular shape at a low supply pressure, and the spray intensity is also reduced. The reason why the spray area is circular is considered to be that there is no guide fin, and that low supply pressure causes low-frequency vibration, and the tip of the nozzle 910f is sprayed with a random circular trajectory. Since the inner diameter of the internal guide 910f is constant, the spray intensity can be reduced while maintaining the diameter of the sprayed droplets at a desired value. Other effects of this embodiment are the same as those of the first embodiment.

[0146] In the above-described embodiment, the load eccentric portion is composed of one or two protrusions having a substantially rectangular parallelepiped shape, a substantially spherical shape, a substantially inclined semi-cylindrical shape, or a substantially triangular prism shape. However, the load eccentric portion of the present invention may be composed of protrusions having various other shapes. For example, the load eccentric portion may be composed of a protrusion having a substantially flat plate shape, a substantially cylindrical shape, a substantially semi-cylindrical shape, a substantially conical shape, a substantially prismatic shape, a substantially semi-prismatic shape, a substantially pyramidal shape, a substantially spherical shape, or a substantially hemispherical shape. In addition, the load eccentric portion is not limited to a single protrusion, and may have any number of protrusions. In short, the load eccentric portion may be composed of any shape and any number of protrusions as long as the load eccentric portion is configured to apply a load in the off-axis direction of the nozzle portion. Furthermore, the dimensions and weight of the load eccentric portion are not limited to specific dimensions and weights as long as the load eccentric portion is configured to apply a load in the off-axis direction of the nozzle portion. In addition, the load eccentric portion of the present invention may be formed of any material. EXAMPLES

[0147] FIG. 13 shows the measurement positions and spray distribution when the spray intensity was measured for the liquid spray nozzle of Example 1 of the present invention, in which (A) shows the measurement positions of the spray intensity, (B) shows the spray distribution as viewed from the front, and (C) shows the spray distribution as viewed from the side.

[0148] In this Example 1, the liquid spray nozzle 10 of the first embodiment shown in FIG. 1 was used, and the single liquid spray nozzle 10 was installed at a height of 2 m with the nozzle opening facing downward. In this case, the load eccentric part 10d was installed so as to protrude downward in FIG. 13(A). Incidentally, the dimensions of the load eccentric part 10d were 5 mm in length, 5 mm in width, and 2 mm in thickness, and the dimensions of the flexible tube part 10c were 2 mm in outer diameter, 1 mm in inner diameter, and 30 mm in length. The measurement date and time was March 2023, the measurement location was outdoors, the weather was sunny, the temperature was 12 ° C, and the wind speed was 0 m / s. Tap water was used without pressurization, and the supply pressure (operating pressure) to the nozzle was 0.18 MPa. As shown in Figure 13(A), the spray range was 8m x 8m, and the spray volume was measured at nine positions in the A direction (1A-9A), nine positions in the B direction (1B-9B), nine positions in the C direction (1C-9C), and nine positions in the D direction (1D-9D), including the nozzle installation position "1", to determine the spray intensity (spray volume per hour). The spray volume was measured using a 220mmφ measuring mass, and the measurement time was 15 minutes.

[0149] Table 1 shows the spray intensity and its average value at each measurement position in the directions A to D. Note that because four measurements (n=4) were taken, there is some variation in the spray intensity at the same measurement positions 1A, 1B, 1C, and 1D. [Table 1]

[0150] From Table 1, it can be seen that the spray intensity of Example 1 was 0.7 to 0.8 mm / h, and from Figures 13 (B) and (C) it can be seen that the spray distribution was uniform in the front-back and left-right directions (A to D directions) and the spray area was circular.

[0151] FIG. 14 shows the measurement position and spray distribution when the spray intensity was measured for the liquid spray nozzle of Comparative Example 1 of the present invention, where (A) shows the measurement position of the spray intensity, (B) shows the spray distribution as viewed from the front, and (C) shows the spray distribution as viewed from the side.

[0152] In this comparative example 1, a liquid spray nozzle 10' corresponding to the liquid spray nozzle 10 of the first embodiment shown in FIG. 1 with the load eccentric part 10d removed was used, and the single liquid spray nozzle 10' was installed at a height of 2 m with the nozzle opening facing downward. Incidentally, the dimensions of the flexible tube part were an outer diameter of 2 mm, an inner diameter of 1 mm, and a length of 30 mm. The measurement date and time were February 2022, the measurement location was outdoors, the weather was sunny, the temperature was 6 ° C, and the wind speed was 0 m / s. Tap water was pressurized and used, and the supply pressure (operating pressure) to the nozzle was 0.2 MPa. As shown in FIG. 14 (A), the spray range was 7.4 m × 0.1 m, and the spray amount was measured at 8 positions in the D direction including the position of "1" where the nozzle was installed, and the spray intensity (spray amount per hour) was obtained. The measurement of the spray amount was performed using a measurement mass of 220 mm φ, and the measurement time was 3 min.

[0153] Table 2 shows the spray intensity at each measurement position in the D direction and its average value. [Table 2]

[0154] From Table 2, it can be seen that the spray intensity of Comparative Example 1 was 19.6 to 26.5 (average: 22.7) mm / h, and from Figures 14 (B) and (C) it can be seen that the spray distribution was not uniform in the front-to-back and left-to-right directions, and the spray area was band-shaped.

[0155] Comparing Comparative Example 1 and Example 1, the spray intensity in Comparative Example 1 was 19.6 to 26.5 (average: 22.7) mm / h, whereas the spray intensity in Example 1 was 0.7 to 0.8 mm / h, which was significantly lower than Comparative Example 1. Since the inner diameter of the flexible tube portion was the same, the diameter of the droplets was approximately the same in both Comparative Example 1 and Example 1. Also, the supply pressure in Comparative Example 1 was 0.2 MPa and the spray area was band-shaped, whereas the supply pressure in Example 1 was lower at 0.18 MPa and the spray area was circular.

[0156] FIG. 15 shows the measurement positions and spray distribution when the spray intensity was measured for the liquid spray nozzle of Example 2 of the present invention, in which (A) shows the measurement positions of the spray intensity, (B) shows the spray distribution as viewed from the front, and (C) shows the spray distribution as viewed from the side.

[0157] In this Example 2, the liquid spray nozzle 810 of the ninth embodiment shown in FIG. 11 was used, and the single liquid spray nozzle 810 was installed at a height of 2 m with the nozzle opening facing downward. In this case, the load eccentric part 810d was installed so as to protrude downward in FIG. 15(A). Incidentally, the dimensions of the load eccentric part 810d were length 10 mm, width 8 mm, and thickness 6 mm, and the dimensions of the nozzle main body 810a were outer diameter 6 mmφ, inner diameter 4 mmφ, and length 150 mm. The measurement date and time was April 2023, the measurement location was outdoors, the weather was sunny, the temperature was 16 ° C, and the wind speed was 0 m / s. Tap water was pressurized and used, and the supply pressure (operating pressure) to the nozzle was 0.12 MPa. As shown in Figure 15 (A), the spray range was 9.6m x 9.6m, and the spray volume was measured at 10 positions in the A direction (1A-10A), 10 positions in the B direction (1B-10B), 10 positions in the C direction (1C-10C), and 10 positions in the D direction (1D-10D), including the nozzle installation position "1", to determine the spray intensity (spray volume per hour). The spray volume was measured using a 220mmφ measuring mass, and the measurement time was 5 minutes.

[0158] Table 3 shows the spray intensity and its average value at each measurement position in the directions A to D. Note that because four measurements (n=4) were taken, there is some variation in the spray intensity at the same measurement positions 1A, 1B, 1C, and 1D. [Table 3]

[0159] From Table 3, it can be seen that the spray intensity of Example 2 was 0.9 to 176.8 mm / h, and from Figures 15(B) and (C) it can be seen that the spray distribution was uniform in the center in the front-back and left-right directions (A to D directions) and the spray area was circular.

[0160] FIG. 16 shows the measurement positions when the spray intensity was measured for the liquid spray nozzle of Comparative Example 2 of the present invention.

[0161] In this comparative example 2, a liquid spray nozzle equivalent to the liquid spray nozzle 810 of the ninth embodiment shown in FIG. 11, which has the same diameter as the rod-shaped liquid spray nozzle 810, was used with the load eccentric part 810d removed, and the single liquid spray nozzle was installed at a height of 2 m with the nozzle opening facing downward. Tap water was pressurized and the supply pressure (operating pressure) to the nozzle was 0.16 MPa. The spray range was 6.4 m x 0.25 m, and as shown in FIG. 16, the spray amount was measured at three positions including the position "2" where the nozzle was installed, and the spray intensity (spray amount per hour) was calculated. The spray amount was measured using a measuring mass of 220 mmφ, and the measurement time was 5 minutes.

[0162] Table 4 shows the spray intensity at each measurement position and its average value. [Table 4]

[0163] From Table 4, it can be seen that the spray intensity of Comparative Example 2 was 367.0 to 407.2 mm / h (average: 380.1) mm / h, and from Fig. 16, it can be seen that the spray distribution was not uniform in the front-back and left-right directions, and the spray area was band-shaped. The fact that the spray area was band-shaped is thought to be unique to this flexible tube due to its tendency to bend.

[0164] Comparing Comparative Example 2 with Example 2, the spray intensity in Comparative Example 2 is 367.0-407.2 mm / h (average: 380.1 mm / h), whereas the spray intensity in Example 2 is 0.9-176.8 mm / h (average: 50.3 mm / h), which is significantly lower than Comparative Example 2. Since the inner diameter of the flexible tube portion is the same, the diameter of the droplets is almost the same in both Comparative Example 2 and Example 2. Also, the spray area in Comparative Example 2 is band-shaped, whereas the spray area in Example 2 is circular.

[0165] The above-mentioned embodiments and examples are merely illustrative of the present invention, and are not limiting, and the present invention can be embodied in various other modified and altered forms. Therefore, the scope of the present invention is defined only by the claims and their equivalents. [Industrial Applicability]

[0166] The liquid spray nozzle of the present invention is placed in all places where artificial rain or liquid spraying is required. For example, it is placed in greenhouse cultivation, watering green areas on the roofs of buildings, fields, vacant lots, grounds, etc., and is used for irrigation and cooling in those places, or to prevent dust and sand. Of course, it is not limited to those, and can be used in all other places where liquid spraying is required, and its range of use is wide. [Explanation of symbols]

[0167] 10, 110, 210, 310, 410, 510, 610, 710, 810, 910 Liquid spray nozzles 10a, 110a, 210a, 310a, 410a, 510a, 610a, 710a, 810a, 910a Nozzle body 10b, 110b, 210b, 310b, 410b, 510b, 610b, 710b, 810b, 910b Thin tube insertion part 10c, 110c, 210c, 310c, 410c, 510c, 610c, 710c flexible tube section 10d, 110d, 210d, 310d, 410d, 510d, 610d, 710d, 810d, 910d Load eccentricity 210d 1 , 310d 1 , 710d 1 First protrusion 210d 2 , 310d 2 , 710d 2 Second protrusion 10e, 110e, 210e, 310e, 410e, 510e, 610e, 710e Guide fins 11 Thin tube 12 Pipe fittings 13 Liquid supply hose 810f, 910f internal conduit

Claims

1. A liquid spray nozzle comprising: a nozzle portion having a nozzle hole opening at its tip and made of a flexible material so as to be capable of vibrating; and a load eccentric portion provided at the tip of the nozzle portion and configured to apply a load in an off-axis direction to the nozzle portion.

2. 2. The liquid spray nozzle according to claim 1, wherein the load eccentric portion is provided at a tip end of the nozzle portion and comprises at least one protrusion protruding in the off-axis direction.

3. 3. The liquid spray nozzle according to claim 2, wherein the at least one protrusion protrudes in only one direction off-axis from the nozzle portion.

4. The liquid spray nozzle according to claim 2, characterized in that the at least one protrusion has an approximately rectangular parallelepiped shape, an approximately flat plate shape, an approximately cylindrical shape, an approximately semi-cylindrical shape, an approximately conical shape, an approximately prism shape, an approximately semi-prism shape, an approximately pyramidal shape, an approximately spherical shape, or an approximately hemispherical shape.

5. 3. The liquid spray nozzle according to claim 2, wherein said at least one protrusion is integrally formed from the same material as said nozzle portion.

6. 6. The liquid spray nozzle according to claim 1, wherein the nozzle portion is provided with a guide fin on a base end side of the nozzle portion.

7. 7. The liquid spray nozzle according to claim 6, wherein a width direction of the guide fin is within a plane parallel to the off-axis direction of the load eccentric portion.

8. 6. The liquid spray nozzle according to claim 1, wherein the nozzle portion has a shape having a constant diameter along an axial direction of the nozzle portion.

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