Nozzle installation structure

Abstract

To provide a nozzle installation structure that can inconspicuously install a nozzle.SOLUTION: A nozzle installation structure 1 has a structure 11 which has a liquid flow passage 12 therein, and is provided with an insertion hole 13 crossing the flow passage 12; and a nozzle 21 which is installed in the insertion hole 13. A gap is formed between an inner wall of the insertion hole 13 and / or an inner hole of the flow passage 12 and the nozzle 21, a communication passage 14, which connects an upstream side and a downstream side of the flow passage 12 with respect to the nozzle 21, is formed by the gap, and a liquid flows into the nozzle 21 from the flow passage 12 or the communication passage 14, and is ejected from the nozzle 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a structure in which a nozzle is installed, i.e., a nozzle installation structure. The present invention also relates to a nozzle and a structure that are suitably used in the nozzle installation structure. [Background technology]

[0002] Nozzles are used in a variety of places, and when a nozzle is installed in a fixed position, it is usually attached to a pipe. For example, Patent Document 1 discloses a spray nozzle in which an adapter is screwed into a threaded hole in a fluid supply pipe and the nozzle body is attached to the adapter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-19954 Summary of the Invention [Problem to be solved by the invention]

[0004] Nozzles are sometimes installed in urban areas as a way to combat the heat, and in such cases, it is desirable from a scenic perspective if the nozzles can be installed in an inconspicuous manner. Even for other purposes, if nozzles are installed in conspicuous locations, it would be desirable to install the nozzles in an inconspicuous manner, as this would enable various nozzle installation configurations in terms of design and scenery. The present invention was made in consideration of the above circumstances, and its purpose is to provide a nozzle installation structure that allows nozzles to be installed in an inconspicuous manner. The present invention also provides a nozzle and a structure that are suitable for use in a nozzle installation structure. [Means for solving the problem]

[0005] The nozzle installation structure of the present invention that can solve the above problems is as follows. [1] A nozzle installation structure having a structure having a liquid flow passage therein and a nozzle insertion hole intersecting the flow passage, and a nozzle installed in the insertion hole, wherein a gap is formed between the nozzle and the inner wall of the insertion hole and / or the inner wall of the flow passage, and a communication path connecting the upstream side and downstream side of the nozzle in the flow passage by the gap, and liquid flows into the nozzle from the flow passage or the communication path and is sprayed from the nozzle. [2] The nozzle installation structure described in [1], wherein the insertion hole penetrates the structure, the nozzle has a tip side and a base side, an outlet provided on the tip side, an inlet provided on the side between the tip side and the base side, and an internal nozzle flow path connecting the inlet and the outlet. [3] The nozzle installation structure described in [1], wherein the insertion hole does not penetrate the structure, the nozzle has a tip side and a base side, an outlet provided on the tip side, an inlet provided on the base side or on the side between the tip side and the base side, and an internal nozzle flow path connecting the inlet and the outlet. [4] A nozzle installation structure as described in [2], wherein a first O-ring is provided on the side of the nozzle closer to the tip end than the inlet, and a second O-ring is provided on the base end than the inlet, and the first O-ring and the second O-ring abut against the inner wall of the insertion hole. [5] A nozzle installation structure according to [3], wherein an O-ring is provided on the side of the nozzle, closer to the tip than the inlet, and the O-ring abuts against the inner wall of the insertion hole. [6] The nozzle installation structure according to any one of [1] to [5], wherein the nozzle is installed in the insertion hole so as not to protrude from the outer surface of the structure. [7] The nozzle installation structure according to any one of [1] to [6], wherein the nozzle is screwed or fitted into the insertion hole. [8] The nozzle installation structure according to any one of [1] to [7], wherein the nozzle is installed across the flow path.

[0006] The present invention also provides the following nozzles and structures: [9] A nozzle having an axial direction extending from the base end side to the tip end side and a radial direction perpendicular to the axial direction, the nozzle having an orifice provided on the tip end side, an inlet provided on the side surface between the tip end side and the base end side, and an internal nozzle flow path connecting the inlet and the orifice, and a first O-ring provided on the side surface closer to the tip end than the inlet, and a second O-ring provided on the side surface closer to the base end than the inlet.

[10] A nozzle as described in [9], wherein at least one of the first O-ring and the second O-ring has a radially outer portion positioned radially outward from the side surface between the first O-ring and the second O-ring.

[11] A nozzle having an axial direction extending from the base end to the tip end and a radial direction perpendicular to the axial direction, the nozzle having an orifice provided on the tip end side, an inlet provided on the side surface of the base end side or between the tip end side and the base end side, and an internal nozzle flow path connecting the inlet and the orifice, and an O-ring provided on the side surface closer to the tip end than the inlet.

[12] The nozzle according to

[11] , wherein the radially outer portion of the O-ring is located radially outward from the side surface on the base end side of the O-ring.

[13] A structure having a liquid flow passage therein and a nozzle insertion hole intersecting the flow passage, wherein the inner wall of the insertion hole has a thread for screwing the nozzle into it, or a protrusion or recess for fitting the nozzle into it. [Effects of the Invention]

[0007] According to the nozzle installation structure of the present invention, the nozzles can be installed so that they do not protrude significantly from the structure, or do not protrude at all from the structure, making the nozzles less noticeable when viewed from outside the nozzle installation structure. This makes it easier to enhance the design of the nozzle installation structure. [Brief explanation of the drawings]

[0008] [Figure 1]1A and 1B show an example of the configuration of a nozzle installation structure according to a first embodiment of the present invention, in which FIG. 1A shows a cross-sectional view along the extension direction of the flow passage of the nozzle installation structure, and FIG. 1B shows a cross-sectional view II of the nozzle installation structure shown in FIG. 1A. [Figure 2] 2A and 2B show an example of the configuration of a nozzle installation structure according to a second embodiment of the present invention, in which FIG. 2A shows a cross-sectional view along the extension direction of the flow passage of the nozzle installation structure, and FIG. 2B shows a cross-sectional view of the nozzle installation structure shown in FIG. 2A taken along line II-II. [Figure 3] 3 is a cross-sectional view of a nozzle installed in the nozzle installation structure shown in FIGS. 1 and 2. FIG. [Figure 4] 4A and 4B show an example of the configuration of a nozzle installation structure according to a third embodiment of the present invention, in which FIG. 4A shows a cross-sectional view along the extension direction of the flow passage of the nozzle installation structure, and FIG. 4B shows a cross-sectional view of the nozzle installation structure shown in FIG. 4A taken along line IV-IV. [Figure 5] 5A and 5B show an example of the configuration of a nozzle installation structure according to a fourth embodiment of the present invention, in which FIG. 5A shows a cross-sectional view along the extension direction of the flow passage of the nozzle installation structure, and FIG. 5B shows a VV cross-sectional view of the nozzle installation structure shown in FIG. 5A. [Figure 6] 6 is a cross-sectional view of a nozzle installed in the nozzle installation structure shown in FIGS. 4 and 5. FIG. [Figure 7] 10 shows an example of a configuration in which a plurality of nozzle installation structures are connected together. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention relates to a structure in which a nozzle is installed. A nozzle installation structure according to an embodiment of the present invention includes a structure having a nozzle insertion hole and a nozzle installed therein. The structure has a liquid flow passage therein, the nozzle insertion hole intersecting the flow passage, and a communication passage connecting the upstream side and downstream side of the nozzle in the flow passage around the nozzle installed in the insertion hole, so that liquid in the flow passage or the communication passage is ejected from the nozzle. The nozzle installation structure of the present invention has a structure in which a nozzle is installed in a flow passage inside the structure, so to speak, and is configured so that liquid can be ejected from the nozzle to the outside of the nozzle installation structure. Therefore, in the nozzle installation structure, the nozzle can be installed so that it does not protrude significantly or protrude at all from the structure, making the nozzle less noticeable when viewed from the outside of the nozzle installation structure and facilitating an enhancement of the design of the nozzle installation structure. Furthermore, since the flow passage of the structure is connected between the upstream side and downstream side of the nozzle via a communication passage, multiple nozzles can be installed in the nozzle installation structure by providing multiple nozzle insertion holes in the flow passage. Hereinafter, a nozzle installation structure according to an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings.

[0010] 1 to 6 show configuration examples of a nozzle installation structure and a nozzle installed in the nozzle installation structure of the present invention. Fig. 1 shows a cross-sectional view of a nozzle installation structure according to a first embodiment, Fig. 2 shows a cross-sectional view of a nozzle installation structure according to a second embodiment, Fig. 3 shows a cross-sectional view of a nozzle installed in the nozzle installation structure shown in Figs. 1 and 2, Fig. 4 shows a cross-sectional view of a nozzle installation structure according to a third embodiment, Fig. 5 shows a cross-sectional view of a nozzle installation structure according to a fourth embodiment, and Fig. 6 shows a cross-sectional view of a nozzle installed in the nozzle installation structure shown in Figs. 4 and 5. In Figs. 1, 2, 4, and 5, Figs. 1(a), 2(a), 4(a), and 5(a) show cross-sectional views of the nozzle installation structure along the extension direction of the flow passage, and Figs. 1(b), 2(b), 4(b), and 5(b) show cross-sectional views perpendicular to the extension direction of the flow passage at the nozzle installation location of the nozzle installation structure.

[0011] The nozzle installation structure 1 has a structure 11 having therein a liquid flow passage 12 and an insertion hole 13 for a nozzle 21, and a nozzle 21 installed in the insertion hole 13. The insertion hole 13 is provided so as to intersect with the flow passage 12, and a gap is formed between the nozzle 21 and the inner wall of the insertion hole 13 and / or the inner wall of the flow passage 12, and this gap forms a communication path 14 that connects the upstream side of the nozzle 21 to the downstream side of the flow passage 12. The nozzle installation structure 1 is configured so that liquid flows into the inside of the nozzle 21 from the flow passage 12 or the communication path 14, and the liquid is sprayed from the nozzle 21.

[0012] The shape and arrangement of the flow channels 12 are not particularly limited as long as they are formed to allow a liquid to flow inside the structure 11. The flow channels 12 may be formed to extend linearly, curvedly, or planarly inside the structure 11. A plurality of flow channels 12 may be formed inside the structure 11. Examples of liquids that flow through the flow channels 12 include water and chemical solutions (e.g., disinfectants, deodorants, perfumes, pesticides, etc.). In Figures 1(a), 2(a), 4(a), and 5(a), the flow direction of the liquid in the flow channels 12 is indicated by arrows.

[0013] The outer shape of the structure 11 is not particularly limited. The structure 11 can be formed to have a thin thickness. Even in the nozzle-installed structure 1 with a thin structure 11, the nozzle 21 can be installed so as not to be noticeable, and for example, the nozzle 21 can be installed so as not to protrude from the structure 11.

[0014] Examples of the shape of the thin structure 11 include a panel shape and a column shape. The planar shape of the panel-shaped structure 11 is not particularly limited, and may be applicable to building materials such as wall materials, floor materials, ceiling materials, and roof materials. For example, if the structure 11 is applicable to an exterior wall, the nozzle installation structure 1 can be used for heat island countermeasures and wall greening. If the structure 11 is applicable to a ceiling material, the nozzle installation structure 1 can be applied to a sprinkler. The shape of the columnar structure 11 is also not particularly limited, and examples include polygonal columns such as square columns and hexagonal columns, and cylinders. The structure 11 may be decorated with any desired decoration. It is preferable that the nozzle 21 is inserted in the thickness direction of the structure 11.

[0015] The thickness of the structure 11 and the nozzle installation structure 1 can be, for example, 100 mm or less, 80 mm or less, 60 mm or less, 50 mm or less, or 40 mm or less. The lower limit of the thickness of the structure 11 and the nozzle installation structure 1 is preferably 8 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more, from the viewpoint of ensuring the inner diameter of the flow passage 12 inside the structure 11 and improving the handleability of the nozzle 21. Note that the structure 11 is not limited to being thin, and may, for example, have a thickness exceeding 100 mm, and may have, for example, a blocky outer shape.

[0016] The insertion hole 13 of the nozzle 21 is provided so as to intersect with the flow path 12. Specifically, the insertion hole 13 is provided so as to intersect with the flow path 12 in the thickness direction of the structure 11. The insertion hole 13 extends to one side and the other side in the thickness direction from the intersection of the insertion hole 13 and the flow path 12. The structure 11 and the nozzle installation structure 1 are configured so that the insertion hole 13 intersects with the flow path 12 and the nozzle 21 is installed in the insertion hole 13, and therefore can be formed with a thin thickness. The nozzle 21 can be installed so as to be embedded in the flow path 12.

[0017] The flow path 12 may extend in a direction intersecting the thickness direction, and preferably extends perpendicular to the thickness direction. The extension length of the flow path 12 extending from the intersection of the insertion hole 13 and the flow path 12 is preferably longer than the smallest part of the inner diameter of the insertion hole 13, i.e., the smallest inner diameter, and more preferably longer than the length of the insertion hole 13 in the thickness direction. For example, the length of the flow path 12 extending from the intersection of the insertion hole 13 and the flow path 12 (specifically, the length of the flow path 12 extending perpendicular to the thickness direction) may be more than 1 time, 2 times or more, 3 times or more, 5 times or more, or 10 times or more the length of the insertion hole 13. The length of the flow path 12 may also be more than 1 time, 2 times or more, 3 times or more, 5 times or more, or 10 times or more the axial length of the nozzle 21. There is no particular upper limit to the length of the flow path 12.

[0018] At the intersection of the insertion hole 13 and the flow path 12, the inner diameter of the insertion hole 13 may be larger or smaller than the inner diameter of the flow path 12, or may be the same as the inner diameter of the flow path 12. In FIGS. 1 and 4, the inner diameter of the insertion hole 13 is larger than the inner diameter of the flow path 12, while in FIGS. 2 and 5, the inner diameter of the insertion hole 13 is smaller than the inner diameter of the flow path 12. In FIGS. 1(b) and 4(b), the flow path 12 is indicated by a dotted line, and when the nozzle 21 is viewed from the downstream side of the flow path 12, the flow path 12 upstream of the nozzle 21 is completely hidden by the nozzle 21, and the inner diameter of the flow path 12 is smaller than the inner diameter of the insertion hole 13. Although not shown in the drawings, the inner diameter of the insertion hole 13 may be larger than the inner diameter of the flow path 12, so that when the nozzle 21 is viewed from the downstream side of the flow path 12, part of the flow path 12 upstream of the nozzle 21 is visible. On the other hand, in Figures 2(b) and 5(b), when the nozzle 21 is viewed from the downstream side of the flow passage 12, a portion of the flow passage 12 upstream of the nozzle 21 is visible, and the inner diameter of the flow passage 12 is larger than the inner diameter of the insertion hole 13.

[0019] The insertion hole 13 may penetrate through the structure 11 as shown in Figures 1 and 2, or may be provided so as not to penetrate through the structure 11 as shown in Figures 4 and 5. An entrance to at least one insertion hole 13 is provided on the outer surface of the structure 11, and the nozzle 21 can be inserted into the insertion hole 13 from the entrance.

[0020] A nozzle 21 is installed in the insertion hole 13. The nozzle 21 is installed so that a gap is formed between the inner wall of the insertion hole 13 and / or the inner wall of the flow path 12, and this gap forms a communication path 14 that connects the upstream side and downstream side of the nozzle 21 in the flow path 12. The nozzle installation structure 1 is configured so that liquid flows into the nozzle 21 from the flow path 12 or the communication path 14 and is sprayed from the nozzle 21. The nozzle 21 shown in FIGS. 1 to 3 is configured so that liquid flows into the nozzle 21 from an inlet 23 provided on the side of the nozzle 21. The nozzle 21 shown in FIGS. 4 to 6 is configured so that liquid flows into the nozzle 21 from an inlet 23 provided on the base end side of the nozzle 21. By installing the nozzle 21 in this manner, the liquid in the flow path 12 or the communication path 14 flows into the nozzle 21 and is sprayed from the nozzle 21, and the liquid can flow from the upstream side of the nozzle 21 to the downstream side in the flow path 12.

[0021] In FIG. 1, a gap is formed between the inner wall of the insertion hole 13 and the nozzle 21, and the gap forms a communication path 14, allowing liquid to flow from the communication path 14 into the interior of the nozzle 21. The liquid in the flow path 12 flows from the upstream side of the nozzle 21 to the downstream side through the communication path 14. In FIG. 2, a gap is formed between the inner wall of the flow path 12 and the nozzle 21, and the gap forms a communication path 14, allowing liquid to flow from the flow path 12 into the interior of the nozzle 21. The liquid in the flow path 12 flows from the upstream side of the nozzle 21 to the downstream side through the communication path 14. In FIG. 4, a gap is formed between the inner wall of the insertion hole 13 and the nozzle 21, and the gap forms a communication path 14, allowing liquid to flow from the communication path 14 into the interior of the nozzle 21. The liquid in the flow path 12 flows from the upstream side of the nozzle 21 to the downstream side through the communication path 14. 5, gaps are formed between the inner wall of flow path 12 and nozzle 21, and between the inner wall of insertion hole 13 and nozzle 21, and these gaps form communication paths 14, allowing liquid to enter communication path 14 from flow path 12 and flow into nozzle 21 from communication path 14. Also, the liquid in flow path 12 flows down from the upstream side of nozzle 21 to the downstream side through communication path 14.

[0022] It is preferable that the nozzle 21 is installed in the insertion hole 13 across the flow path 12. That is, it is preferable that the nozzle 21 is located at the intersection between the insertion hole 13 and the flow path 12 and is provided so as to extend from the intersection to one side and the other side in the thickness direction. By installing the nozzle 21 in this manner, it becomes easy to form the nozzle installation structure 1 thin.

[0023] Nozzle 21 has a tip side and a base side, with nozzle 22 provided at the tip side, and inlet 23 for taking liquid into nozzle 21 provided facing flow path 12 or communication path 14. Inside nozzle 21, there is formed an internal nozzle flow path 24 connecting inlet 23 and nozzle 22. By configuring nozzle 21 in this manner, liquid flows from flow path 12 or communication path 14 through inlet 23 into internal nozzle flow path 24, and can be ejected from nozzle 22. It is preferable that nozzle 22 be provided facing the outside of nozzle installation structure 1.

[0024] The nozzle 21 has an axial direction extending from the base end side to the tip end side and a radial direction perpendicular to the axial direction. The radial direction refers to a direction extending radially from the center of the nozzle 21 in a cross section perpendicular to the axial direction of the nozzle 21. The nozzle 21 preferably has a tip end surface 25 on the tip end side and a base end surface 26 on the base end side. The tip end surface 25 can be defined as a surface visible when viewing the nozzle 21 from the tip end side, and the base end surface 26 can be defined as a surface visible when viewing the nozzle 21 from the base end side. The nozzle orifice 22 is preferably formed in the tip end surface 25 of the nozzle 21.

[0025] 1 and 2, when insertion hole 13 is formed penetrating structure 11, inlet 23 of nozzle 21 is preferably provided on the side surface between the base end and tip end of nozzle 21. It is preferable that at least a portion of the side surface of nozzle 21 on the tip side of inlet 23 and at least a portion of the side surface on the base end side abut against the inner wall of insertion hole 13, which makes it easy to form nozzle 21 so that the liquid flowing through flow passage 12 and communication passage 14 is introduced into nozzle 21 without leaking outside nozzle installation structure 1.

[0026] From the viewpoint of improving the liquid-tightness between the side surface of the nozzle 21 and the inner wall of the insertion hole 13, it is preferable that a first O-ring 27A is provided on the side surface of the nozzle 21 closer to the tip than the inlet 23, and a second O-ring 27B is provided closer to the base than the inlet 23, so that the first O-ring 27A and the second O-ring 27B abut against the inner wall of the insertion hole 13. The first O-ring 27A and the second O-ring 27B can be made of an elastic material. This can more effectively prevent the liquid flowing through the flow passage 12 and the communication passage 14 from leaking to the outside of the nozzle installation structure 1. Note that if the liquid-tightness between the side surface of the nozzle 21 and the inner wall of the insertion hole 13 can be ensured without providing the first O-ring 27A and the second O-ring 27B, the first O-ring 27A and the second O-ring 27B may not be provided.

[0027] It is preferable that the radially outer portion of at least one of the first O-ring 27A and the second O-ring 27B be positioned radially outward from the side surface of the nozzle 21 between the first O-ring 27A and the second O-ring 27B (see FIG. 3). Specifically, it is preferable that the radially outer portion of at least one of the first O-ring 27A and the second O-ring 27B be positioned radially outward from the entire side surface of the nozzle 21 between the first O-ring 27A and the second O-ring 27B. In FIG. 3, the second O-ring 27B is positioned in this manner. By providing the first O-ring 27A and / or the second O-ring 27B in this manner, a wide gap is more likely to be formed between the nozzle 21 and the inner wall of the insertion hole 13 when the nozzle 21 is installed in the insertion hole 13, making it easier to ensure a wide cross-sectional area of ​​the communication path 14 between the nozzle 21 and the inner wall of the insertion hole 13.

[0028] The radially outer portions of first O-ring 27A and second O-ring 27B refer to the radially outer portions of first O-ring 27A and second O-ring 27B, including their radially outermost portions. Note that, in nozzle 21, both the radially outer portions of first O-ring 27A and second O-ring 27B may be positioned radially outward from a side surface of nozzle 21 between first O-ring 27A and second O-ring 27B. However, if the outer diameter of the base end side and the outer diameter of the tip end side of nozzle 21 are different, the radially outer portion of one of first O-ring 27A and second O-ring 27B may be positioned radially inward from a part of the side surface of nozzle 21 between first O-ring 27A and second O-ring 27B.

[0029] When the insertion hole 13 is provided to penetrate the structure 11, the insertion hole 13 may be formed so that the nozzle 21 is inserted from the distal end side, or may be formed so that the nozzle 21 is inserted from the proximal end side. In FIGS. 1 and 2 , the nozzle 21 is formed so that the outer diameter at the proximal end side is larger than the outer diameter at the distal end side, and the insertion hole 13 is formed so that the inner diameter of the portion where the side surface of the base end of the nozzle 21 abuts is larger than the inner diameter of the portion where the side surface of the distal end of the nozzle 21 abuts. Therefore, the nozzle 21 is inserted into the insertion hole 13 from the distal end side. By forming the insertion hole 13 and the nozzle 21 in this manner, the visible area of ​​the nozzle 21 can be narrowed when viewed from the distal end side of the nozzle 21, which is easily visible, in the nozzle installation structure 1, making the nozzle 21 less noticeable. Note that the outer diameter at the distal end side of the nozzle 21 may be larger than the outer diameter at the proximal end side, or the outer diameter at the proximal end side may be the same as the outer diameter at the distal end side.

[0030] 4 and 5, when the insertion hole 13 does not penetrate the structure 11, it is preferable that the inlet 23 of the nozzle 21 is provided on the base end side of the nozzle 21 (i.e., at a location visible from the base end side of the nozzle 21) or on a side surface between the base end side and the tip end side of the nozzle 21. In FIGS. 4 and 5, the inlet 23 is provided on the base end side of the nozzle 21. When the insertion hole 13 does not penetrate the structure 11, it is preferable that the nozzle 21 is inserted into the insertion hole 13 from the base end side, and the nozzle hole 22 provided on the tip end side of the nozzle 21 faces the outside of the nozzle installation structure 1.

[0031] From the viewpoint of improving the liquid-tightness between the side surface of nozzle 21 and the inner wall of insertion hole 13, it is preferable that an O-ring 27 is provided on the side surface of nozzle 21 closer to the tip than inlet 23, with O-ring 27 abutting against the inner wall of insertion hole 13. O-ring 27 can be made of an elastic material. This makes it possible to more effectively prevent the liquid flowing through flow passage 12 and communication passage 14 from leaking to the outside of nozzle installation structure 1. Note that if liquid-tightness between the side surface of nozzle 21 and the inner wall of insertion hole 13 can be ensured without providing an O-ring, O-ring 27 does not have to be provided.

[0032] The radially outer portion of O-ring 27 is preferably located radially outward from the side surface on the proximal side of O-ring 27. Specifically, the radially outer portion of O-ring 27 is preferably located radially outward from the entire side surface on the proximal side of O-ring 27. By providing O-ring 27 in this manner, a wide gap is more likely to be formed between nozzle 21 and the inner wall of insertion hole 13 when nozzle 21 is installed in insertion hole 13, making it easier to ensure a wide cross-sectional area of ​​communication path 14 between nozzle 21 and the inner wall of insertion hole 13. The radially outer portion of O-ring 27 refers to the portion of O-ring 27 located radially outward, and includes the radially outermost portion.

[0033] Although the size of the nozzle 21 is not particularly limited, the axial length of the nozzle 21 is preferably, for example, 8 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. This makes it easier to ensure the handleability of the nozzle 21. On the other hand, from the viewpoint of making the nozzle 21 compact, the axial length of the nozzle 21 is, for example, preferably 50 mm or less, more preferably 40 mm or less, and even more preferably 30 mm or less.

[0034] It is preferable that the nozzle 21 is detachably installed in the insertion hole 13. This allows the nozzle 21 to be installed in or removed from the insertion hole 13 of the structure 11 as needed, allowing for a wide variety of installation options for the nozzle 21. When the nozzle 21 is removed, the insertion hole 13 can be covered without stopping the flow of liquid through the flow path 12.

[0035] It is preferable that the nozzle 21 is screwed or fitted into the insertion hole 13. When the nozzle 21 is screwed into the insertion hole 13, it is preferable that threads are formed on the side surface of the nozzle 21 and the inner wall of the insertion hole 13. When the nozzle 21 is fitted into the insertion hole 13, it is preferable that a convex portion is provided on the side surface of the nozzle 21 and a concave portion into which the convex portion fits is provided on the inner wall of the insertion hole 13, or that a concave portion is provided on the side surface of the nozzle 21 and a convex portion that fits into the concave portion is provided on the inner wall of the insertion hole 13.

[0036] The threads, convex portions, or concave portions are preferably provided on the side surface of nozzle 21 as follows: When nozzle 21 is inserted into insertion hole 13 from the tip side, the threads, convex portions, or concave portions are preferably provided on the side surface of nozzle 21 on the base end side of inlet 23. When nozzle 21 is inserted into insertion hole 13 from the base end side, the threads, convex portions, or concave portions are preferably provided on the side surface of nozzle 21 on the tip end side of inlet 23.

[0037] When a protrusion is provided on the side surface of nozzle 21 or the inner wall of insertion hole 13, it is preferable that the protrusion be provided so as to be able to protrude and retract from the side surface of nozzle 21 or the inner wall of insertion hole 13. For example, it is preferable that a protrusion provided to protrude radially outward from the side surface of nozzle 21 be formed so as to be pushed into the interior of nozzle 21 when a radially inward force is applied. By providing a protrusion on the side surface of nozzle 21 or the inner wall of insertion hole 13 in this way, it becomes easy to detachably fit nozzle 21 into insertion hole 13.

[0038] From the viewpoint of enhancing the design of the nozzle installation structure 1, it is preferable that the nozzle installation structure 1 be formed so that there is a small difference in level between the tip end surface 25 or base end surface 26 of the nozzle 21 and the outer surface of the structure 11. The difference in level between the tip end surface 25 or base end surface 26 of the nozzle 21 and the outer surface of the structure 11 is, for example, preferably 5 mm or less, more preferably 3 mm or less, even more preferably 1 mm or less, and even more preferably 0.5 mm or less, and it is particularly preferable that there is substantially no difference in level between the tip end surface 25 or base end surface 26 of the nozzle 21 and the outer surface of the structure 11. Furthermore, by installing the nozzle 21 in this manner, dust and dirt are less likely to accumulate at the tip of the nozzle 21.

[0039] It is preferable that the nozzle 21 is installed in the insertion hole 13 so that it does not protrude from the outer surface of the structure 11. By installing the nozzle 21 in the insertion hole 13 in this way, the nozzle 21 becomes inconspicuous when viewed from outside the nozzle installation structure 1. Furthermore, it is possible to prevent a person's hand or other members from hitting or getting caught on the nozzle 21 in the nozzle installation structure 1, thereby improving the safety of the nozzle installation structure 1. Furthermore, it is also expected to have an effect of preventing tampering with the nozzle 21.

[0040] Preferably, a tool fitting hole 28 for installing the nozzle is provided on the distal end surface 25 or the proximal end surface 26 of the nozzle 21. The nozzle installation tool has a fitting portion that can fit into the tool fitting hole 28. By inserting the fitting portion of the nozzle installation tool into the tool fitting hole 28, the nozzle 21 can be handled using the nozzle installation tool, making it easy to install the nozzle 21 into the insertion hole 13 of the structure 11. For example, this makes it easy to screw the nozzle 21 into the insertion hole 13 so that the nozzle 21 does not protrude from the outer surface of the structure 11. The nozzle installation tool may be used when removing the nozzle 21 from the insertion hole 13. In the case where the nozzle 21 is fitted into the insertion hole 13 and a protrusion is provided on the side surface of the nozzle 21, the nozzle installation tool may be configured so that the protrusion on the side surface of the nozzle 21 is pushed into the interior of the side surface of the nozzle 21 by inserting the fitting portion of the nozzle installation tool into the tool fitting hole 28.

[0041] Known types of nozzles 21 include single-fluid nozzles that spray only liquid and two-fluid nozzles that spray both liquid and gas, but it is preferable to use a single-fluid nozzle. There are no particular restrictions on the nozzle outlet structure or internal structure, and any known nozzle structure can be used. In the drawings, a nozzle equipped with an anti-drip valve (check valve) is used, and the configuration of this nozzle will be described with reference to Figures 3 and 6.

[0042] The nozzle internal flow path 24 of the nozzle 21 has a first space 31 communicating with the inlet 23, a second space 32 communicating with the nozzle 22, and a throttle flow path 33 connecting the first space 31 and the second space 32. A filter 34 is installed in the first space 31, and the liquid that flows into the first space 31 from the inlet 23 is filtered by the filter 34 and introduced into the second space 32. This prevents the nozzle 22 from being clogged with impurities.

[0043] A valve element 35 is provided in the second space 32, and the connecting portion of the inner wall of the second space 32 with the throttle flow path 33 functions as a valve seat that receives the valve element 35. The valve element 35 is provided so as to be able to move toward and away from the valve seat, and by abutting against the valve seat, the flow of liquid from the throttle flow path 33 to the second space 32 is blocked. A spring member 36 that presses the valve element 35 toward the valve seat is provided in the second space 32.

[0044] An internal member 37 is provided in the second space 32, defining a flow path for the liquid toward the nozzle orifice 22. The liquid flows through the gap between the inner wall of the nozzle internal flow path 24 and the outer surface of the internal member 37, is introduced into the nozzle orifice 22, and is ejected from the nozzle orifice 22 to the outside of the nozzle 21. One end of a spring member 36 abuts against the valve body 35, and the other end of the spring member 36 is supported by the internal member 37. A groove may be formed on the outer surface of the internal member 37, thereby making it possible to control the flow direction of the liquid in the gap between the inner wall of the nozzle internal flow path 24 and the outer surface of the internal member 37.

[0045] The nozzle 21 configured as described above can stably abut the valve element 35 against the valve seat when the pressure of the liquid flowing from the first space 31 to the second space 32 is below a predetermined value. When the pressure of the liquid flowing from the first space 31 to the second space 32 exceeds a predetermined value, the valve element 35 moves away from the valve seat, and the liquid flows into the second space 32 through the throttle flow path 33. When liquid is supplied to the inside of the nozzle 21 from the flow path 12 of the structure 11 at a predetermined pressure, the valve element 35 moves away from the valve seat to open, allowing the liquid to flow into the second space 32 and be ejected from the nozzle orifice 22. When the pressure of the liquid supplied to the inside of the nozzle 21 falls below a predetermined value, the valve element 35 abuts against the valve seat to close, and the liquid stops ejecting from the nozzle orifice 22. This prevents the ejection of coarse particles that would otherwise be ejected if the liquid pressure were below a predetermined value, and prevents dripping.

[0046] The nozzles installed on the nozzle installation structure are not limited to the nozzles shown in the drawings, and nozzles without anti-drip valves or filters may also be used. For example, the nozzle opening structure and internal structure of the nozzle may be the same as those of a known impingement nozzle or swirl nozzle.

[0047] A collision nozzle is a nozzle that atomizes a straight rod-shaped stream emitted from the tip of the nozzle body by colliding it with a collision pin provided on the extension of the tip of the nozzle body. Examples of collision nozzles include those disclosed in JP-A-9-94487 and U.S. Pat. No. 7,320,443.

[0048] A swirl nozzle is a nozzle that includes a nozzle tip having an orifice at the tip end of a nozzle body, and multiple grooves extending radially from the orifice formed on the inner surface of the nozzle tip. The grooves formed in the nozzle tip are not through grooves but have bottoms, and may extend linearly or arcuately from the orifice. Fluid ejected from the orifice of the nozzle body passes through the grooves of the nozzle tip at the tip end of the nozzle body, forming a swirling flow, and is then sprayed as a mist from the orifice. Examples of swirl nozzles include the nozzles disclosed in Japanese Patent Application Laid-Open Nos. 2008-104929 and 2009-36316.

[0049] The nozzle can spray for various purposes, such as cooling, humidification, landscape design, dust suppression, static electricity prevention, sterilization and cleaning, and infection prevention. The average particle diameter of the liquid ejected from the nozzle is preferably 50 μm or less, more preferably 30 μm or less, and even more preferably 20 μm or less. The lower limit of the average particle diameter of the ejected liquid is not particularly limited, and may be 1 μm or more, 3 μm or more, or 5 μm or more. It is more preferable that the liquid be ejected as a dry fog, i.e., a fine mist that does not feel wet to the touch. In this case, the average particle diameter of the liquid ejected from the nozzle is preferably 25 μm or less, more preferably 20 μm or less, and even more preferably 15 μm or less. The average particle diameter described here refers to the Sauter mean particle diameter measured when the particle size distribution of the liquid ejected from the nozzle is measured 30 cm from the tip of the nozzle using a laser diffraction particle size distribution analyzer. When a laser Doppler particle size distribution analyzer is used, the average particle size of the liquid ejected from the nozzle is preferably 35 μm or less, more preferably 30 μm or less, and even more preferably 25 μm or less. The nozzle may eject the liquid as a rod-like stream.

[0050] The target space for spraying may be outdoors, an indoor space surrounded by walls or a roof, or a semi-indoor space without a roof or walls that allows free flow of fresh air. Examples of outdoor spaces to be sprayed include parks, amusement parks, schoolyards, stations, outdoor public facilities, roads, etc. Examples of indoor spaces to be sprayed include factories, clean rooms, warehouses, halls, offices, hospitals, nursing homes, stores, schools, houses, livestock barns, greenhouses, plant factories, mushroom cultivation rooms, etc.

[0051] The nozzle installation structure can be unitized. For example, a nozzle installation structure in which one or more nozzles are installed can be unitized, and the unitized nozzle installation structures can be connected to extend the flow passage. This will be described with reference to FIG. 7.

[0052] FIG. 7 shows an example of a configuration in which multiple nozzle installation structures are connected. Three nozzles 21 are installed in one nozzle installation structure 1, and the nozzle installation structures 1 are connected by connecting the flow passages 12 of the structures 11. The nozzle installation structures 1 may also be connected via a structure 41 having a flow passage 42 in which no nozzle is installed. By unitizing the nozzle installation structures 1 in this way, the nozzles can be easily installed together with the piping. It is preferable that the ends of the flow passages are sealed, which ensures the pressure of the liquid in the flow passages and the supply pressure of the liquid to the nozzles.

[0053] When multiple nozzles are installed in a nozzle installation structure, the tip surfaces of all the nozzles may or may not be installed on the same surface of the structure. For example, when nozzles are installed in a polygonal pillar-shaped structure, the tip surface of one nozzle may be installed on one surface of the polygonal pillar, and the tip surface of another nozzle may be installed on the other surface of the polygonal pillar.

[0054] The present invention also provides a nozzle and a structure for use in a nozzle installation structure. The nozzle of the present invention is a nozzle having an axial direction extending from the base end to the tip end and a radial direction perpendicular to the axial direction, and includes an orifice provided at the tip end, an inlet provided on a side surface between the tip end and the base end, and an internal nozzle flow path connecting the inlet and the orifice. A first O-ring is provided on the side surface of the nozzle closer to the tip end than the inlet, and a second O-ring is provided on the side surface of the nozzle closer to the base end than the inlet. A nozzle configured in this manner can be suitably installed and used in a structure in which a nozzle insertion hole penetrates the structure. The nozzle of the present invention is also preferably a nozzle having an axial direction extending from the base end to the tip end and a radial direction perpendicular to the axial direction, and includes an orifice provided at the tip end, an inlet provided on a side surface between the base end and the tip end, and an internal nozzle flow path connecting the inlet and the orifice. An O-ring is also preferred in a structure in which the nozzle insertion hole does not penetrate the structure. For details of the nozzle of the present invention, please refer to the description of the nozzle in the nozzle installation structure above.

[0055] The structure of the present invention is preferably a structure having a liquid flow path therein and a nozzle insertion hole intersecting the flow path, the inner wall of the insertion hole being provided with a thread for screwing the nozzle into it, or a convex or concave portion for fitting the nozzle into it. In a structure configured in this way, the nozzle can be easily installed in the nozzle insertion hole, and the nozzle can be installed compactly in the structure. [Explanation of symbols]

[0056] 1: Nozzle installation structure 11: Structure 12: Distribution path 13: Insertion hole 14: Access Road 21: Nozzle 22: Spout 23:Inlet 24: Nozzle internal flow path 25: Tip surface 26: Proximal surface 27: O-ring, 27A: 1st O-ring, 27B: 2nd O-ring 28: Tool fitting hole 31: 1st space 32:Second space 33:Throttle channel 34: Filter 35: Valve body 36: Spring material 37: Internal parts

Claims

1. a structure having a liquid flow passage therein and a nozzle insertion hole intersecting the flow passage; A nozzle installation structure having a nozzle installed in the insertion hole, a gap is formed between an inner wall of the insertion hole and / or an inner wall of the flow passage and the nozzle, and the gap forms a communication path connecting an upstream side and a downstream side of the nozzle in the flow passage, A nozzle installation structure in which liquid flows into the nozzle from the flow path or the communication path and is ejected from the nozzle.

2. the insertion hole penetrates the structure; The nozzle installation structure described in claim 1, wherein the nozzle has a tip side and a base side, and has an orifice provided on the tip side, an inlet provided on the side between the tip side and the base side, and an internal nozzle flow path connecting the inlet and the orifice.

3. The insertion hole does not penetrate the structure, The nozzle installation structure described in claim 1, wherein the nozzle has a tip side and a base side, and has an orifice provided on the tip side, an inlet provided on the base side or on a side between the tip side and the base side, and an internal nozzle flow path connecting the inlet and the orifice.

4. 3. The nozzle installation structure according to claim 2, wherein a first O-ring is provided on the side of the nozzle closer to the tip end than the inlet, and a second O-ring is provided on the side of the nozzle closer to the base end than the inlet, and the first O-ring and the second O-ring abut against the inner wall of the insertion hole.

5. The nozzle installation structure according to claim 3 , wherein an O-ring is provided on the side surface of the nozzle closer to the tip than the inlet, and the O-ring abuts against an inner wall of the insertion hole.

6. 6. The nozzle installation structure according to claim 1, wherein the nozzle is installed in the insertion hole so as not to protrude from an outer surface of the structure.

7. The nozzle installation structure according to any one of claims 1 to 5, wherein the nozzle is screwed or fitted into the insertion hole.

8. 6. The nozzle installation structure according to claim 1, wherein the nozzle is installed across the flow passage.

9. A nozzle having an axial direction extending from a base end side to a tip end side and a radial direction perpendicular to the axial direction, A nozzle provided on the tip side; an inlet provided on a side surface between the distal end side and the proximal end side; a nozzle internal flow path connecting the inlet and the nozzle, The nozzle has a first O-ring provided on the side surface closer to the tip end than the inlet, and a second O-ring provided on the side surface closer to the base end than the inlet.

10. 10. The nozzle according to claim 9, wherein the radially outer portion of at least one of the first O-ring and the second O-ring is located radially outward from the side surface between the first O-ring and the second O-ring.

11. A nozzle having an axial direction extending from a base end side to a tip end side and a radial direction perpendicular to the axial direction, A nozzle provided on the tip side; an inlet provided on a side surface of the base end side or between the tip end side and the base end side; a nozzle internal flow path connecting the inlet and the nozzle, The nozzle has an O-ring provided on the side surface closer to the tip than the inlet.

12. The nozzle according to claim 11 , wherein the radially outer portion of the O-ring is located radially outward from the side surface on the base end side of the O-ring.

13. A structure having a liquid flow passage therein and a nozzle insertion hole intersecting the flow passage, A structure in which a thread for screwing a nozzle into the inner wall of the insertion hole, or a protrusion or recess for fitting the nozzle into the insertion hole is provided.

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