Cleaning nozzle and local cleaning device

Abstract

A simple structure of a cleaning nozzle and a local cleaning device is provided to suppress an increase in diameter and cost of the cleaning nozzle and to increase a peak load of cleaning water sprayed. The cleaning nozzle is a cylindrical cleaning nozzle in which a flow path of the cleaning water is formed along an axial direction, has a spray outlet that sprays the cleaning water toward a local part of a human body, and is provided with a main flow path that communicates with the flow path and forms a main flow of the cleaning water flowing toward the spray outlet along a central axis of the spray outlet, and at least one branch flow path that forms a branch flow branched from the main flow and causes the branch flow to join the main flow in a direction intersecting the central axis in a manner that disturbs a flow of the main flow.

Description

Technical Field

[0001] This invention relates to a cleaning nozzle and a local cleaning device. Background Technology

[0002] Conventionally, such localized cleaning devices have been proposed with a structure that sprays cleaning water from the nozzle outlet toward a specific area of ​​the body (see, for example, Patent Document 1). In this device, two flow paths are provided within the cleaning nozzle toward the nozzle outlet, and a water storage chamber is provided at the confluence of the two flow paths. Air is introduced into the water storage chamber through an opening open to the atmosphere. Furthermore, when cleaning water is supplied, air bubbles introduced into the water storage chamber are ejected from the nozzle outlet along with the cleaning water, creating a pulsating flow pattern with both low and high velocities. This increases the peak load of the cleaning water and enhances the cleaning sensation.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-132051

[0006] The technical problem that the invention aims to solve

[0007] In the aforementioned Patent Document 1, since two flow paths and a water storage chamber are provided extending axially from the cleaning nozzle, components for forming each flow path and partitions for the water storage chamber need to be arranged inside the cleaning nozzle. Therefore, not only does the outer diameter of the cleaning nozzle increase, but the cost also increases. Summary of the Invention

[0008] The main objective of this invention is to increase the peak load of the sprayed cleaning water with a simple structure that suppresses the increase in diameter and cost of the cleaning nozzle.

[0009] Technical means for solving technical problems

[0010] To achieve the above-mentioned main objectives, the present invention employs the following technical means.

[0011] The cleaning nozzle of the present invention,

[0012] It is a cylindrical cleaning nozzle in which the flow path of cleaning water is formed along the axial direction, and has a spray outlet that sprays cleaning water toward a specific area of ​​the human body, wherein the cleaning nozzle comprises:

[0013] The main flow path is connected to the flow path and forms a main flow of cleaning water flowing along the central axis of the nozzle; and at least one branch flow path forms a branch from the main flow path and causes the branch to merge with the main flow path in a direction intersecting the central axis in a manner that disrupts the flow of the main flow path.

[0014] The cleaning nozzle of the present invention includes at least one branch flow path, which forms a branch from the main flow path and merges with the main flow in a direction intersecting the central axis of the nozzle outlet in a manner that disrupts the flow of the main flow. Because the flow becomes intermittent due to the disruption of the main flow, and the pulsation of the cleaning water ejected from the nozzle outlet is increased, the peak load of the cleaning water can be improved. Furthermore, since it is not necessary to arrange the main flow path and the branch flow path to extend axially in the cleaning nozzle, and components for ensuring their space are also unnecessary, the increase in nozzle diameter and cost can be suppressed. Therefore, the peak load of the ejected cleaning water can be improved with a simple structure.

[0015] In the cleaning nozzle of the present invention, at least one suction hole may be formed, which draws in air through the jet effect of the main flow, and the branch flow path branches off from the main flow at the nozzle outlet side relative to the suction hole. Therefore, since it is easier to interrupt the main flow by merging the branch flows containing air bubbles, the pulsation of the cleaning water can be increased, and the peak load can be further improved.

[0016] In the cleaning nozzle of the present invention, the branch flow path may also merge with the main flow path in a direction orthogonal to the central axis of the nozzle outlet. Therefore, since merging the cleaning water from the branch flow path with the main flow path by colliding makes it easier to interrupt the flow of the main flow, the pulsation of the cleaning water can be increased, further enhancing the peak load.

[0017] In the cleaning nozzle of the present invention, it may also include: a nozzle outlet forming member having a cylindrical portion and a flange portion, the cylindrical portion having the nozzle outlet formed at its upper end and a through hole formed in its sidewall, the flange portion extending radially outward from the upper end of the cylindrical portion; and a flow path forming member having a recess supporting the flange portion and receiving the nozzle outlet forming member with a gap between the recess and the cylindrical portion, and the main flow path being formed at the center of the bottom surface of the recess, the branch flow paths being formed as gaps between the cylindrical portion and the recess, and the branch flow paths merging via the through hole. Thus, since the branch flow paths can be formed with a simple structure, cost increases can be suppressed.

[0018] Since the local cleaning apparatus of the present invention includes any of the above-described cleaning nozzles, the cleaning nozzle of the present invention has a structure that achieves the following effect: it increases the peak load of the sprayed cleaning water with a simple structure that suppresses the increase in the diameter and cost of the cleaning nozzle. Therefore, it is possible to prevent the local cleaning apparatus from becoming too large. Attached Figure Description

[0019] Figure 1 This is a perspective view of a toilet 1 equipped with a toilet cleaning device 10 including a partial cleaning device.

[0020] Figure 2 This is a perspective view of the nozzle 21 of the buttock cleaning nozzle 20.

[0021] Figure 3 This is a three-dimensional cross-sectional view of the nozzle 21.

[0022] Figure 4 This is a three-dimensional cross-sectional view of the nozzle 21.

[0023] Figure 5 This is a three-dimensional cross-sectional view of the nozzle 21.

[0024] Figure 6 This is a three-dimensional cross-sectional view of the nozzle 21.

[0025] Figure 7 This is a cross-sectional view of the nozzle forming component 31 and the flow path forming component 41.

[0026] Figure 8 This is a perspective view of the nozzle forming component 31.

[0027] Figure 9 This is a structural diagram of the nozzle forming component 31.

[0028] Figure 10 yes Figure 9 AA sectional view.

[0029] Figure 11 This is an explanatory diagram illustrating an example of the spraying of cleaning water.

[0030] Figure 12 This is an explanatory diagram showing an example of the load measurement results of the sprayed cleaning water.

[0031] Symbol Explanation

[0032] 1…Toilet bowl; 10…Toilet bidet device; 12…Toilet bowl body; 14 Toilet seat; 16…Toilet lid; 18…Control panel; 20…Buttock cleaning nozzle; 21…Spray head; 22…Flow path; 23…Opening; 31…Spray outlet forming component; 32…Spray outlet; 33…Spraying part; 34…Cylindrical part; 34a…Conical part; 35…Flange part; 37…Through hole; 38…Spiral part; 41…Flow path forming component; 42…Connecting flow path; 43…Main flow path; 43a…Small diameter part; 43b…Large diameter part; 43c…Conical part; 45…Air inlet path; 46…Intake hole; 47…Branch path; 48…Recess; 48a…Supporting recess; 48b…Receiving recess. Detailed Implementation

[0033] Next, the method for carrying out the present invention will be described.

[0034] Figure 1 This is a perspective view of a toilet 1 equipped with a toilet bidet device 10, including a partial cleaning device. (See image below.) Figure 1 As shown, the toilet washing device 10 is installed on the upper surface of the toilet bowl 1, and includes a toilet bowl body 12, a toilet seat 14 and a toilet lid 16 that are supported on the toilet bowl body 12 and can be opened and closed, and an operation panel 18 that can be operated by the user. Furthermore, in this embodiment, the left-right direction, the front-back direction, and the up-down direction are as follows... Figure 1 As shown.

[0035] The toilet body 12 includes a partial cleaning device, which comprises: a water supply line for cleaning water connected to a water supply pipe (water pipe); a stop valve; a heat exchange unit; a switching valve for switching the flow rate and target of the cleaning water; and a nozzle unit with a cleaning nozzle that sprays cleaning water. These components are housed in a resin housing. The heat exchange unit has a built-in ceramic heater, for example, with a rated output of about 1200W, and is capable of instantly heating the cleaning water. The switching valve is configured, for example, as a rotary valve driven by a stepper motor, which can switch the target of the cleaning water supply while adjusting the flow rate of the cleaning water supplied through the water supply port. The nozzle unit includes a posterior cleaning nozzle 20 for posterior cleaning and a genital cleaning nozzle for genital cleaning, and is configured to allow each cleaning nozzle to move back and forth in the front-to-back direction between a receiving position and a cleaning position.

[0036] Although not illustrated, the control panel 18 is equipped with a powerful cleaning switch for strong posterior cleaning (for strong posterior cleaning), a gentle cleaning switch for mild posterior cleaning (for mild posterior cleaning), a vulvar cleaning switch for genital cleaning, a cleaning intensity adjustment switch for adjusting the cleaning intensity, a cleaning position adjustment switch for adjusting the cleaning position forward and backward, and a stop switch for indicating when to stop cleaning.

[0037] The structure of the buttock cleaning nozzle 20 will be described below. Figure 2 This is a perspective view of the nozzle 21 of the buttock-cleansing nozzle 20. Figures 3-6 This is a cross-sectional perspective view of the spray head 21. Additionally, Figure 7 This is a cross-sectional view of the nozzle forming component 31 and the flow path forming component 41. Figure 8 This is a perspective view of the nozzle forming component 31. Figure 9 This is a structural diagram of the nozzle forming component 31. Figure 10 yes Figure 9 AA sectional view.

[0038] The buttock-cleaning nozzle 20 of this embodiment is a cylindrical component configured to perform both powerful and gentle cleaning. A powerful cleaning nozzle outlet 32 ​​and a gentle cleaning nozzle outlet 25 are formed at the top of the nozzle 20. The buttock-cleaning nozzle 20 is a structure combining a cylindrical main body (not shown) whose flow path for cleaning water supplied from a switching valve extends axially, and a cylindrical nozzle head 21 coaxially mounted with the main body.

[0039] The spray head 21 is equipped with a nozzle outlet forming member 31 and a flow path forming member 41. The nozzle outlet forming member 31 forms a nozzle outlet 32 ​​(ejection portion 33), and the flow path forming member 41 accommodates the nozzle outlet forming member 31 and forms a flow path for cleaning water to the nozzle outlet forming member 31. Furthermore, in the spray head 21, a water supply pipe (not shown) extending axially from the main body and throughout the spray head 21, and a flow path 22 communicating with the water supply pipe, are provided as a flow path for powerful cleaning. The space between the outer peripheral surface of the water supply pipe and the inner peripheral surface of the buttock cleaning nozzle 20 (the inner peripheral surface of the main body and the inner peripheral surface 27 of the spray head 21) is provided as a flow path for gentle cleaning. Additionally, the spray head 21 has a radially open (through) opening 23 communicating with the nozzle outlet 32 ​​of the nozzle outlet forming member 31. This opening 23 and the nozzle outlet 32 ​​can also be collectively referred to as a powerful cleaning nozzle outlet.

[0040] The nozzle forming member 31 includes a cylindrical portion 34 and a flange portion 35. The cylindrical portion 34 forms a nozzle portion 33 as a cylindrical space having a nozzle 32 at its upper end (one end) and an opening at its lower end. The flange portion 35 extends radially from the upper end of the cylindrical portion 34. The opening at the lower end of the nozzle portion 33 communicates with the main flow path 43 (described later), and the main flow of cleaning water flowing coaxially with the central axis of the nozzle 32 flows into the main flow path 43. The cylindrical portion 34 has a tapered portion 34a whose outer diameter decreases towards the lower end, and a through hole 37 that penetrates the sidewall in a direction orthogonal to the central axis, i.e., radially. Furthermore, there may be one or more through holes 37. A spiral portion 38 extending in a spiral shape is formed on the outer peripheral surface of the sidewall of the cylindrical portion 34. The upper end of the spiral portion 38 extends to the vicinity of the through hole 37 (see reference). Figure 8 Furthermore, the ejection portion 33 is not limited to a cylindrical space, but can be any cylindrical space; similarly, the cylindrical portion 34 is not limited to a cylindrical shape, but can be any cylindrical shape.

[0041] The flow path forming member 41 has a recess 48 for receiving the nozzle forming member 31. With the nozzle forming member 31 received in the recess 48, the flow path forming member 41 is mounted on the top end (front end) of the nozzle head 21 and closes the top end of the nozzle head 21. The flow path forming member 41 forms a connecting flow path 42 that communicates with the flow path 22 of the nozzle head 21, a main flow path 43 that communicates with the connecting flow path 42 and extends coaxially with the central axis of the nozzle 32 (ejection portion 33), and a branch flow path 47 that branches off from the main flow path 43.

[0042] The connecting flow path 42 is formed such that its inner diameter decreases from the upstream side communicating with the flow path 22 toward the downstream side communicating with the main flow path 43, and the downstream end of the connecting flow path 42 opens upward (towards the nozzle 32). The main flow path 43 has a small-diameter portion 43a communicating with the end of the connecting flow path 42, a large-diameter portion 43b communicating with the small-diameter portion 43a and having a larger diameter than the small-diameter portion 43a, and a tapered portion 43c communicating with the large-diameter portion 43b and having an inner diameter that increases upward. The tapered portion 43c is exposed into the recess 48 as a central hole in the bottom surface of the recess 48. That is, the main flow path 43 is formed as a central hole communicating with the bottom surface of the recess 48, and the main flow path 43 forms the main flow of cleaning water flowing coaxially with the central axis of the nozzle 32.

[0043] Furthermore, the flow path forming member 41 has an air inlet passage 45 that is open to the atmosphere and allows air to be introduced into it. The air inlet passage 45 extends radially through the flow path forming member 41 and communicates with the main flow path 43 via two air intake holes 46 provided on the sidewall forming the large diameter portion 43b. The air inlet passage 45 draws air into the main flow path 43 through the air intake holes 46 by the jet effect of the main flow in the main flow path 43.

[0044] The recess 48 has a supporting recess 48a that supports the flange portion 35 of the nozzle forming member 31, and a receiving recess 48b that is coaxially connected to the supporting recess 48a with an inner diameter smaller than that of the supporting recess 48a and receives the cylindrical portion 34 of the nozzle forming member 31. The inner diameter of the receiving recess 48b is formed to be slightly larger than the outer diameter of the spiral portion 38, and the cylindrical portion 34 is received with a predetermined gap between it and the sidewall of the cylindrical portion 34. In addition, the tapered portion 34a at the lower end of the cylindrical portion 34 and the tapered portion 43c of the main flow path 43 exposed to the bottom surface of the receiving recess 48b are formed to be inclined at approximately the same angle and are positioned opposite each other with a gap. Therefore, the cylindrical portion 34 and the receiving recess 48b form a continuous gap such that the bottom surface of the tapered portion 43c of the main flow path 43, i.e., the recess 48 (receiving recess 48b), surrounds the outer peripheral surface of the sidewall of the cylindrical portion 34.

[0045] Branch path 47 is formed as a continuous gap between the aforementioned receiving recess 48b and the cylindrical portion 34. Branch path 47 allows a branch stream branching from the main stream of the main stream 43 to flow through this gap and merge with the main stream within the ejection portion 33 via the through hole 37 of the cylindrical portion 34. Furthermore, in this embodiment, branch path 47 branches from the main stream 43 on the ejection outlet 32 ​​side compared to the suction hole 46. As described above, since the through hole 37 penetrates the sidewall of the cylindrical portion 34 radially through the ejection portion 33, the branch stream flowing through branch path 47 flows radially into the ejection portion 33 and merges with it.

[0046] Next, the operation of the toilet cleaning device 10 configured in this way will be explained, especially the case of powerful cleaning through the buttock cleaning nozzle 20. Figure 11 This is an explanatory diagram illustrating an example of a powerful cleaning solution being sprayed out.

[0047] like Figure 11As shown, the cleaning water flowing from the connecting flow path 42 to the main flow path 43 (small diameter portion 43a) flows linearly towards the ejection portion 33 as the main flow along the central axis of the ejection port 32. Furthermore, at the point where the inner diameter expands from the small diameter portion 43a of the main flow path 43 to the large diameter portion 43b, a portion of the main flow branches into the branch flow path 47, and air is drawn in through the suction port 46 using the jet effect of the main flow. The drawn-in air becomes bubbles and flows along with the cleaning water. Since the suction port 46 draws in air radially outward, the bubbles mainly flow in the branch flow path 47. Therefore, although not shown in the figure, the bubbles flow along the lower surface of the spiral portion 38 towards the through hole 37. Then, the branch flow passing through the branch flow path 47 flows radially into the ejection portion 33 from the through hole 37 and merges with the main flow within the ejection portion 33. The main stream flows coaxially with the central axis of the nozzle 32 (ejector section 33). Since the tributary flowing into the nozzle 33 flows radially in the nozzle 33, i.e., in a direction orthogonal to the central axis (the flow of the main stream) of the nozzle 32, the two collide and merge, interrupting the flow of the main stream. As a result, turbulence is generated within the nozzle 33, hindering the continuous flow of the main stream, causing the cleaning water ejected from the nozzle 32 to flow intermittently and pulsate. Furthermore, since air bubbles are mixed into the tributary, the effect of interrupting the main stream when air bubbles enter (merge) is further enhanced, easily promoting the change from continuous flow to intermittent flow, thus increasing the pulsation.

[0048] in addition, Figure 12 This is an explanatory diagram showing an example of the load measurement results of the sprayed cleaning water. The load measurement results, for example, are obtained by measuring the load of the cleaning water using a load meter positioned at a predetermined distance from the nozzle 32. The horizontal axis represents time, and the vertical axis represents the load of the cleaning water. Furthermore, Figure 12 (a) shows the results of the comparative example. Figure 12 (b) shows the measurement results of this embodiment. Although the illustration is omitted, the cleaning nozzle of the comparative example does not have a branch path 47 or an air intake 46, and simply sprays out the cleaning water supplied from the straight flow path (equivalent to the main flow path 43) as a continuous flow.

[0049] exist Figure 12 In comparative example (a), the pulsation of the cleaning water load is smaller, and the peak load is also smaller. Therefore, users who prefer a stronger cleaning feel may not be able to obtain a satisfactory cleaning experience. On the other hand, in Figure 12 In this embodiment (b), compared to the comparative example, the pulsation of the cleaning water load is increased, and the peak load is also increased. Therefore, the cleaning sensation can be easily improved.

[0050] The bidet nozzle 20 of the toilet bidet device 10 described above has: a main flow path 43, which forms a main flow coaxial with the central axis of the nozzle outlet 32; and a branch flow path 47, which allows a branch from the main flow to merge with the main flow in a manner that disrupts the flow of the main flow. Because turbulence is generated by the merging of the main flow and the branch flow, the sprayed bidet water can be pulsated, thereby increasing the peak load of the bidet water. Furthermore, it is not necessary to provide the main flow path 43 and the branch flow path 47 along the axial direction of the bidet nozzle 20, nor is it necessary to provide devices requiring a drive source, such as a pump or an air intake device. Therefore, it is possible to increase the pulsation of the bidet water and improve the peak load with a simple structure that suppresses the increase in the diameter of the bidet nozzle 20 and the resulting cost.

[0051] In addition, since the buttock cleaning nozzle 20 can merge the tributary of the air bubbles mixed with the air drawn in from the air intake 46 through the jet effect with the main stream, thereby improving the effect of cutting off the main stream, it can increase the pulsation of the cleaning water and further increase the peak load.

[0052] In addition, since the buttock cleaning nozzle 20 can merge the tributary and the main stream in a direction orthogonal to the central axis of the nozzle outlet 32, thereby improving the effect of cutting off the main stream, it can increase the pulsation of the cleaning water and further increase the peak load.

[0053] Furthermore, since the branch path 47 of the buttock cleaning nozzle 20 is formed as a gap between the cylindrical portion 34 and the recess 48, the branch path 47 can be formed with a simple structure, thereby suppressing the increase in cost.

[0054] In the above-described embodiment, although the branch path 47 merges the branch stream with the main stream in a direction orthogonal to the central axis of the nozzle 32, it is not limited to this. The branch stream can merge with the main stream in a direction intersecting the central axis in a manner that disrupts (interrupts, obstructs) the flow of the main stream. For example, the branch streams can merge in a direction inclined upwards relative to the direction orthogonal to the upward-facing main stream flow (the central axis of the nozzle 32), or in a direction inclined downwards (opposite to the main stream flow), etc., merging in a direction intersecting the central axis. Furthermore, when multiple branch paths 47 are provided, the angle at which the branch streams of each branch path 47 merge with the main stream is not limited to the same angle; they can be different angles.

[0055] In this embodiment, although the branch path 47 branches off from the main path 43 on the downstream side (towards the nozzle 32) compared to the suction port 46, it is not limited to this. Alternatively, the branch path 47 may branch off from the main path 43 on the upstream side compared to the suction port 46. That is, the bubbles may flow in the main path without passing through the branch and into the nozzle 33.

[0056] In this embodiment, although the air intake vent 46 is provided at two locations, it is not limited to this; it may also be provided at one location, or at multiple locations, including three or more locations. Alternatively, it may be a structure that does not provide the air intake vent 46 and does not actively draw in air (bubbles). Even with such a structure, by merging the tributary with the main flow in a way that cuts off the main flow, the pulsation can be increased and the peak load can be improved.

[0057] In this embodiment, although the branch path 47 is formed as a gap between the cylindrical portion 34 and the recess 48, it is not limited to this. Any structure can be used as long as the branch path 47 is formed in a manner that branches from the main path 43 and merges at the ejection portion 33. In addition, although the main path 43 is connected to the ejection portion 33, it is not limited to this. The main path 43 can also be directly connected to the ejection outlet 32.

[0058] In this embodiment, a structure for both strong and gentle cleaning is illustrated using a buttock-cleaning nozzle 20. However, this is not a limitation; separate nozzles for strong and gentle cleaning can also be provided. In such cases, the present invention can be applied to the nozzle for strong cleaning. Furthermore, since the pulsation and peak load of the cleaning water can be adjusted by changing the design of the flow rate of the branch (cross-sectional area of ​​the branch path 47) and the amount of air drawn in from the suction port 46 (cross-sectional area of ​​the suction port 46) according to the desired cleaning sensation, the present invention can be applied not only to strong cleaning but also to gentle cleaning. Additionally, the present invention is not limited to buttock cleaning but can also be applied to genital cleaning.

[0059] The correspondence between the main elements of this embodiment and the main elements of the invention described in the section on methods for solving technical problems will be explained. In this embodiment, the nozzle 32 corresponds to "nozzle outlet", the buttock cleaning nozzle 20 corresponds to "cleaning nozzle", the main flow path 43 corresponds to "main flow path", and the branch flow path 47 corresponds to "branch flow path". The suction hole 46 corresponds to "suction hole". The cylindrical portion 34 corresponds to "cylindrical portion", the flange portion 35 corresponds to "flange portion", the nozzle forming component 31 corresponds to "nozzle outlet forming component", the recess 48 corresponds to "recess", and the flow path forming component 41 corresponds to "flow path forming component".

[0060] Furthermore, the correspondence between the main elements of this embodiment and the main elements of the invention described in the "Method for Solving the Technical Problem" section is merely an example of the manner of implementing the invention described in the "Method for Solving the Technical Problem" section of this embodiment, and is not intended to limit the elements of the invention described in the "Method for Solving the Technical Problem" section. That is, the explanation of the invention described in the "Method for Solving the Technical Problem" section should be based on the description in that section; this embodiment is simply a specific example of the invention described in the "Method for Solving the Technical Problem" section.

[0061] While specific embodiments of the present invention have been described above, the present invention is not limited to such embodiments. It is self-evident that various methods can be implemented without departing from the spirit of the present invention.

[0062] Industrial utilization potential

[0063] This invention can be applied to industries such as the manufacturing of toilet cleaning devices.

Claims

1. A cleaning nozzle, which is a cylindrical cleaning nozzle in which the flow path of cleaning water is formed along an axial direction, having an outlet for spraying cleaning water toward a specific area of ​​the human body, wherein, This cleaning nozzle has the following features: The main flow path is connected to the flow path and forms a main flow of cleaning water flowing along the central axis of the nozzle. At least one branch path that forms a tributary from the main stream and merges the tributary with the main stream in a direction intersecting the central axis; A nozzle forming component having a cylindrical portion having the nozzle formed at its upper end and a through hole formed on its side wall; as well as A flow path forming component has a recess that accommodates the nozzle forming component, and a main flow path is formed at the center of the recess. The branch path is formed as a gap between the cylindrical portion and the recess, and the branches merge through the through hole.

2. The cleaning nozzle according to claim 1, wherein, At least one air intake hole is formed in the main flow path to draw in air, and the air intake hole is formed in the flow path forming component. The tributary path, compared to the intake hole, branches off from the main stream at the outlet side.

3. The cleaning nozzle according to claim 1 or 2, wherein, The tributary path merges with the main stream in a direction orthogonal to the central axis of the nozzle.

4. The cleaning nozzle according to claim 1 or 2, wherein, The nozzle forming component has a flange that extends radially outward from the upper end of the cylindrical portion. The recess supports the flange and accommodates the nozzle forming member with a gap between it and the cylindrical portion, and the main flow path is formed at the center of the bottom surface of the recess.

5. The cleaning nozzle according to claim 1, wherein, As a tapered portion with a decreasing outer diameter towards the lower end is formed at the lower end of the cylindrical portion of the nozzle forming member, the nozzle forming member has a flange portion that extends radially outward from the upper end side of the cylindrical portion. The recess supports the flange and accommodates the nozzle forming member with a gap between it and the cylindrical portion. The main flow path is formed in a manner that communicates with the center of the bottom surface of the recess. A tapered portion, which is formed at approximately the same angle as the tapered portion of the cylindrical portion and is gap-separated from the tapered portion of the cylindrical portion, is formed at the center of the bottom surface. It has at least one air intake hole, which draws in air through the jet effect of the mainstream flow. The branch path, compared to the intake hole, causes the branch to branch from the main stream at the outlet side, and is formed as a continuous gap between the conical portion of the cylindrical portion and the conical portion of the concave portion, as well as between the sidewall of the cylindrical portion and the inner wall of the concave portion.

6. A local cleaning device, wherein, The cleaning nozzle is provided with any one of claims 1 to 5.

Images