WO2020189255A1

WO2020189255A1 - Discharge apparatus

Info

Publication number: WO2020189255A1
Application number: PCT/JP2020/008834
Authority: WO
Inventors: 哲郎松本; 立行竹内; 道太郎牧; 弘明渡邊
Original assignee: 株式会社Ｌｉｘｉｌ
Priority date: 2019-03-15
Filing date: 2020-03-03
Publication date: 2020-09-24
Also published as: JP2020146359A; JP7329341B2

Abstract

The present invention includes an ejection water path 34 that is capable of ejecting a jet flow F1 forward, and a discharge water path 36 that is capable of discharging forward a film-like flow F3 which passes above the jet flow F1, said film-like flow F3 having a cross-section orthogonal to the flow direction that has a film-shape having ends. The film-like flow F3 does not approach the jet flow F1 when the film-like flow F3 is reduced, thereby preventing the film-like flow F3 from merging with the jet flow F1 at an early stage. Thus, the area onto which the jet flow F1 falls directly can be enlarged while preventing the jet flow F1 from splashing by the film-like flow F3.

Description

Discharge device

This disclosure relates to a discharge device.

Conventionally, a discharge device capable of injecting a jet flow has been proposed for the purpose of massaging a bather. As an example of this, Patent Document 1 proposes a discharge device including an injection channel for injecting an injection stream and a discharge channel for discharging an annular film-like stream. In this discharge device, the jet stream is surrounded by the annular film-like water to prevent the jet stream from scattering.

Japanese Unexamined Patent Publication No. 9-103381

In the disclosed technology of Patent Document 1, the membranous flow forms a ring. Therefore, as the flight distance of the membranous flow increases, the membranous flow shrinks due to the influence of surface tension, and the annular membranous flow merges with the inner jet flow at an early stage. Therefore, there is a problem that the range in which the jet flow is directly exposed is narrow.

A certain aspect of the present disclosure is made in view of such a problem, and one of the purposes thereof is a technique capable of widening the range in which the jet flow can be directly exposed to the jet stream while preventing the jet stream from scattering by the film-like flow. Is to provide.

The first aspect of the present disclosure for solving the above-mentioned problems is a discharge device. The discharge device of the first aspect includes an injection water channel capable of injecting the injection flow forward and a discharge water channel capable of discharging the membranous flow passing above the injection flow forward, and the film-like flow flows. It has an endped film shape in a cross section orthogonal to the direction.

It is a block diagram of the discharge system of 1st Embodiment. It is another block diagram of the discharge system of 1st Embodiment. It is a schematic front view which shows the discharge device of 1st Embodiment together with the peripheral structure. It is a schematic plan view which shows the discharge device of 1st Embodiment together with the peripheral structure. It is a schematic diagram which shows the operation of the discharge device of a reference form. 5A is a cross-sectional view taken along the line AA of FIG. 5A. It is a figure which shows the injection direction and the discharge direction of the discharge device of 1st Embodiment. It is a schematic side view which shows the discharge device of 2nd Embodiment together with the peripheral structure. It is a schematic front view which shows the discharge device of 2nd Embodiment together with the peripheral structure. It is a schematic side view which shows the discharge device of 3rd Embodiment together with the peripheral structure. It is a schematic front view which shows the discharge device of 3rd Embodiment together with the peripheral structure.

According to the first aspect, even if the membranous flow is deflated, the membranous flow does not approach the jet flow, and early confluence of the membranous flow and the jet flow can be avoided. Along with this, it is possible to widen the range in which the jet flow can be directly exposed while preventing the jet flow from scattering due to the film-like flow.

Hereinafter, embodiments will be described. The same components are designated by the same reference numerals, and duplicate description will be omitted. In each drawing, the components are omitted, enlarged, or reduced as appropriate for convenience of explanation. The drawings shall be viewed according to the orientation of the symbols. The shapes referred to in the present specification naturally include not only shapes that exactly match the shapes referred to, but also shapes that are deviated by an error such as a dimensional error or a manufacturing error.

Refer to FIGS. 1 and 2. FIG. 1 is a schematic side view of the discharge device 10, and FIG. 2 is a schematic front view of the discharge device 10. The discharge device 10 of this embodiment is used for the water supply equipment 12. The water supply facility 12 of the present embodiment is a bathroom facility. In addition to the discharge device 10, the water supply equipment 12 of the present embodiment includes a bathtub 14 and a wall body 16 for partitioning an indoor space serving as a bathroom space. In addition to this, the water supply facility 12 includes a washing floor and the like adjacent to the bathtub 14. The bathtub 14 is an example of a tank body through which the film-like flow F3 (described later) discharged from the discharge device 10 passes through the inside.

The discharge device 10 of this embodiment is used in the discharge system 18. The discharge system 18 includes a storage tank 20 for storing water, a water supply channel 22 for supplying water from the storage tank 20 to the discharge device 10, a valve device 24 and a pump 26 provided in the middle of the water supply channel 22, and a valve device 24. And a control device 28 for controlling the pump 26.

The storage tank 20 of this embodiment is a bathtub 14 for storing water. The bathtub water (not shown) in the bathtub 14 is supplied to the discharge device 10 through the water supply channel 22.

The water supply channel 22 includes an upstream water channel 22a provided on the upstream side of the valve device 24, and a plurality of

downstream water channels

22b and 22c provided on the downstream side of the valve device 24. A pump 26 is provided in the middle of the upstream water channel 22a. The plurality of

downstream water channels

22b and 22c are a jet flow channel 22b for supplying water to the injection channel 34 (described later) of the discharge device 10 and a membrane for supplying water to the discharge channel 36 (described later) of the discharge device 10. A diversion channel 22c is included.

The valve device 24 can switch between the presence or absence of communication between each of the plurality of

downstream waterways

22b and 22c and the upstream waterway 22a. The valve device 24 is configured by using, for example, a switching valve such as a multi-sided valve, or a plurality of on-off valves. The valve device 24 can at least perform the first operation mode in which both the injection flow channel 22b and the membrane diversion channel 22c and the upstream water channel 22a are communicated with each other through either control by the control device 28 or manual operation. At this time, by pumping the water sucked from the storage tank 20 by the pump 26, water is supplied to the injection channel 34 and the discharge channel 36 of the discharge device 10 through the injection flow channel 22b and the film-like flow channel 22c of the water supply channel 22. Will be done. As a result, the injection flow F1 is injected from the injection water channel 34, and at the same time, the film-like flow F3 is discharged from the discharge water channel 36.

The discharge device 10 includes a device main body 32 fixed to a base 30 provided in the water supply facility 12. The apparatus main body 32 of the present embodiment is fixed to the base 30 using a fixing structure (not shown). This fixed structure is, for example, a screw structure, a claw and a claw holder, and the like. The base 30 of the present embodiment is composed of a flange portion of the bathtub 14 provided on the peripheral edge of the upper surface opening of the bathtub 14.

The discharge device 10 includes an injection water channel 34 and a discharge water channel 36 formed inside the device main body 32. In the present embodiment, water is supplied to the injection water channel 34 and the discharge water channel 36 from the lower side in the vertical direction through the water supply channel 22. An injection hole 38 is formed at the downstream end of the injection channel 34. A discharge hole 40 is formed at the downstream end of the discharge water channel 36. In the present specification, in a plan view, the direction along the center line CL2 (see FIG. 6) of the discharge hole 40 is referred to as the front-rear direction X, and the horizontal direction orthogonal to the front-rear direction X is referred to as the left-right direction Y. Of both sides of the front-rear direction X, the discharge direction of the discharge water channel 36 is called the front side (front side), and the opposite side is called the rear side.

The injection hole 38 opens in the front portion of the device main body 32. The discharge device 10 of the present embodiment includes a plurality of injection water channels 34 (two in the illustrated example). The injection holes 38 of the plurality of injection water channels 34 are provided at positions spaced apart from each other in the left-right direction Y in the front view. The discharge hole 40 of the discharge water channel 36 opens at the front surface of the apparatus main body 32. The discharge hole 40 has a slit shape extending in the left-right direction Y. The "front view" here means viewing from the front side in the front-rear direction X, and is synonymous with viewing from the viewpoint of FIG. 2, for example.

The injection hole 38 is provided below the discharge hole 40 in the front view. The injection hole 38 of the present embodiment is provided at a position where it vertically overlaps with the discharge hole 40 in a front view. The injection hole 38 of the present embodiment is provided at a position within the range Sa in the left-right direction Y where the discharge hole 40 is provided in the front view. The injection hole 38 is not provided at a position protruding outside this range Sa.

Refer to FIGS. 1, 3 and 4. The injection water channel 34 can inject water supplied from the injection flow water channel 22b of the water supply channel 22 as the injection flow F1. Each figure shows the injection range of the injection flow F1. The injection water channel 34 can inject the injection flow F1 so as to protrude forward from the injection hole 38. The jet flow F1 of this embodiment is a water jet F2. The "water jet" here includes not only a single-phase flow jet of water but also a multiphase flow jet in which water is a continuous phase and air is dispersed.

The discharge water channel 36 can discharge the water supplied from the film-like diversion water channel 22c of the water supply channel 22 as the film-like flow F3. Each figure shows the discharge range of the membranous flow F3. In the illustrated example, a state in which the jet flow F1 collides with the film-like flow F3 is shown (see range S1). The discharge water channel 36 can discharge the film-like flow F3 passing above the injection flow F1 so as to protrude forward from the discharge hole 40.

The membranous flow F3 can limit the scattering range of the droplets by blocking the flow of the droplets of the jet flow F1. In the present embodiment, droplets are generated by the collision of the jet flow F1 of the water jet F2 with an object such as a user. In the present embodiment, the discharge water channel 36 discharges the membranous flow F3 so as to hit the user's neck, and the injection water channel 34 injects the jet flow F1 so as to hit the user's shoulder below the user's neck. As a result, it is possible to limit the scattering of the droplets of the jet flow F1 above the membrane flow F3, and it is possible to prevent the scattering of the droplets on the user's face above the membrane flow F3.

The injection water channel 34 of the present embodiment injects the water jet F2 so that the flow direction and the flow rate are constant in time. The discharge water channel 36 of the present embodiment discharges the film-like flow F3 so that the flow direction and the flow rate are constant in time. "Constant in time" here means that when a constant flow rate of water is supplied to the mentioned waterway, the flow direction and flow rate when jumping out of the mentioned waterway hardly change in time. Means that.

The jet flow F1 and the membranous flow F3 are sprayed from the back side onto the user's body, particularly the neck, shoulders, etc. of the user in a sitting position while bathing in the bathtub 14. As a result, the user can be given a massage effect and a relaxing effect. By using hot water for the jet flow F1 and the film-like flow F3, it is possible to give the user a hot bath effect and a heat retention effect. By using the jet flow F1 and the film-like flow F3, different hit feelings can be given to the user.

The membranous flow F3 has an endped membrane shape in a cross section orthogonal to the flow direction. The hatching in FIG. 3 shows a cross section of the membranous flow F3 orthogonal to the flow direction when it jumps out of the discharge water channel 36. The term "ended film shape" as used herein means a film shape in which both ends 50a and 50b are separated from each other in a cross section orthogonal to the flow direction. It can be said that the membranous flow F3 forms an acyclic shape in this cross section. This condition may be satisfied at least in the cross section orthogonal to the flow direction when the discharge water channel 36 is ejected. It can be said that the membranous flow F3 has an endped film shape in a cross section orthogonal to the center line CL2 (see FIG. 6) of the discharge hole 40 when it jumps out of the discharge water channel 36. The membranous flow F3 of the present embodiment has an endped film shape that draws a straight line in such a cross section. In addition to this, the film-like flow F3 may have a curved shape such as an arc shape, and its specific shape is not particularly limited.

The membranous flow F3 is discharged from the discharge water channel 36 so as to form a parabolic shape downward as the distance from the discharge water channel 36 increases from the side view. The jet stream F1 of the water jet is jetted from the jet channel 34 so as to form either a parabolic shape or a linear shape that is gentler than the parabola drawn by the film-like flow F3 in a side view. The membranous flow F3 is discharged from the discharge water channel 36 so as to pass only above the jet flow F1 either until it merges with the jet flow F1 or is received by the water in the bathtub 14 in a side view. To. The "side view" here may be viewed from the left-right direction Y, and is synonymous with viewing from the viewpoint of FIG. 1, for example.

The effects of the above discharge device 10 will be described.

Refer to FIGS. 5A and 5B. 5A and 5B are the discharge device 110 of the reference form. The discharge device 110 of the reference embodiment includes an injection water channel 134 for injecting the injection flow F1 and a discharge water channel 136 for discharging the annular film-like flow F3. In this figure, for convenience of explanation, an example in which water is discharged downward from the injection water channel 134 and the discharge water channel 136 is shown.

The discharge device 110 of the reference embodiment is different from the discharge water channel 36 of the embodiment in that it discharges the annular film-like flow F3. In this case, when the film-like flow F3 is deflated due to the influence of surface tension as the flight distance of the film-like flow F3 increases, the annular film-like flow F3 is deformed so as to approach the inner injection flow F1. .. As a result, the annular membranous flow F3 merges with the jet flow F1 at an early stage (see range S2). In particular, when the jet flow F1 is a water jet, when the film-like flow F3 and the jet flow F1 are exposed to the combined flow F4, the scattering of the droplets cannot be blocked by the film-like flow F3, which is unpleasant for some users. I may feel it.

(A) In this respect, the discharge water channel 36 of the present embodiment discharges an end-film-like film-like flow F3. As a result, even if the membranous flow F3 is deflated, the membranous flow F3 does not approach the jet flow F1, and the early confluence of the membranous flow F3 and the jet flow F1 can be avoided. Along with this, the film-like flow F3 can prevent the droplets of the jet flow F1 from scattering, and the range in which the jet flow F1 can be directly exposed can be widened.

When the jet flow F1 is a water jet F2, the water jet F2 can be directly bathed in a wide range, and the scattering of droplets generated at the bathed portion can be blocked by the film-like flow F3. Therefore, for example, while the water jet F2 is directly exposed to a wide range of the user's body, the film-like flow F3 can prevent the droplets from scattering on the user's face, and can give the user a good feeling of use.

Next, other features of the discharge device 10 will be described.

Refer to FIG. The injection range of the injection flow F1 is set so as to be within the discharge range of the film-like flow F3 in front view. This injection range is set so as not to protrude from this ejection range in the front view.

The injection range here refers to the range in which the injection flow F1 actually passes between the time when the injection water channel 34 is ejected and the time when the injection flow F1 hits any of the film-like flow F3 and the fixed structure 42, and the locus drawn by the injection flow F1. Represented by. The discharge range refers to the range in which the film-like flow F3 actually passes between the time when the discharge water channel 36 is ejected and the time when the film-like flow F3 hits the fixed structure 42, and is represented by the trajectory drawn by the film-like flow F3. In each case, it is assumed that there is no object to be exposed to the membranous flow F3 and the jet flow F1, and a constant flow rate of water is supplied to the mentioned water channel. The "object" here is a user in this embodiment. The "fixed structure" here means a structure around the jet flow F1 and the film-like flow F3, and is the bathtub 14 in the present embodiment.

(C) As a result, by blocking the scattering of the jet flow F1 forward and upward by the film-like flow F3, it is possible to reliably prevent the droplets from scattering over a wide area.

Refer to FIG. The injection direction D1 of the injection water channel 34 is set to be downward from the discharge direction D2 of the discharge water channel 36 in the side view. The injection direction D1 here means a direction along the center line CL1 of the injection hole 38 of the injection water channel 34. The discharge direction D2 refers to a direction along the center line CL2 of the discharge hole 40 of the discharge water channel 36. Both the injection direction D1 and the discharge direction D2 are forward.

Explain this advantage. Since the jet flow F1 tends to have stronger momentum than the membrane flow F3, it tends to fly straighter than the membrane flow F3. Therefore, when the injection direction D1 and the discharge direction D2 are parallel to each other, the injection flow F1 (two-point chain line injection flow F1) easily collides with the parabolic film-like flow F3 at a location P1 near the injection water channel 34. Become.

(B1) On the other hand, according to the present embodiment, as compared with the case where the injection direction D1 and the discharge direction D2 are parallel to each other, the injection flow is at a position P1 closer to the injection water channel 34 with respect to the parabolic film-like flow F3. The situation where F1 collides can be avoided. Along with this, it becomes easier for the injection flow F1 to reach a place far from the injection water channel 34, and it becomes easier to further widen the range in which the injection flow F1 can be directly exposed. In this embodiment, an example is shown in which the injection flow F1 collides with the film-like flow F3 at a portion P2 far from the injection water channel 34. However, the jet stream F1 may be received by the water in the bathtub 14.

(B2) Compared with the case where the injection direction D1 and the discharge direction D2 are parallel to each other, the injection flow F1 can be easily reached even in a place where the film-like flow F3 cannot reach. This assumes, for example, a case where the jet flow F1 reaches the user's back or the like as a place that cannot be reached by the film-like flow F3.

The injection channel 34 injects the injection stream F1 so as to reach in front of the intersection P1 of the membranous stream F3 and the horizontal line (F1 of the alternate long and short dash line in FIG. 6) passing through the outlet of the injection channel 34 in a side view. It can also be regarded as. As shown in FIGS. 3 and 4, the injection directions D1 of the adjacent injection water channels 34 are set so as to approach each other toward the front side.

(Second Embodiment) Refer to FIGS. 7 and 8. The discharge device 10 of the present embodiment has a different injection water channel 34 as compared with the first embodiment. The device main body 32 includes a fluid element 44 incorporated in the device main body 32. An injection water channel 34 is provided inside the fluid element 44.

The injection water channel 34 of the fluid element 44 can inject water supplied from the injection flow water channel 22b of the water supply channel 22 as the injection flow F1. The injection water channel 34 can inject a water jet F2 as an injection flow F1 so that the flow direction when jumping out of the injection water channel 34 changes with time. The injection water channel 34 can change the flow direction of the injection flow F1 when it jumps out of the injection water channel 34 in time without changing the direction of the device main body 32. The injection channel 34 of the present embodiment can be temporally changed so as to swing the flow direction when jumping out of the injection channel 34 in the left-right direction Y. As a result, the wavy injection flow F1 is radially injected from the injection water channel 34. In FIG. 8, the injection range S3 of the wavy injection flow F1 is shown by the alternate long and short dash line.

Specific examples of the fluid element 44 for realizing such a function are not particularly limited. For example, as described in Japanese Patent Application Laid-Open No. 2008-517762, a fluid element 44 capable of swinging the flow direction of the jet flow F1 by colliding a pair of jet flows in a confluence chamber provided in the jet water channel 34 It may be used. In addition to this, a fluid element 44 capable of swinging the flow direction of the injection flow F1 by using the Karman vortex may be used, or the flow direction of the injection flow F1 can be swinging by using the Coanda effect. The fluid element 44 may be used.

When the flow direction of the water jet F2 changes with time in this way, the location exposed to the water jet F2 also changes with time. Therefore, as compared with the case where the flow direction is constant in time, the water film formed at the portion exposed to the water jet F2 becomes thinner, and the droplets of the water jet F2 are more likely to scatter from there.

(D) According to the present embodiment, even in such a situation where the droplets of the water jet F2 are likely to be scattered, the droplets of the water jet F2 can be blocked by the membranous flow F3, and the scattering can be effectively prevented. Can be prevented.

In particular, when the flow direction of the water jet F2 changes with time, the injection range of the water jet F2 becomes wider than when the flow direction is constant with time. Even when the injection range of the water jet F2 is widened in this way, by making the film-like flow F3 into an endped film shape, it is possible to avoid merging with the film-like flow F3 and to provide a range in which the jet flow F1 can be directly exposed. Can be wider.

Also in the present embodiment, as in the first embodiment, the injection direction D1 of the injection water channel 34 is set to be downward from the discharge direction D2 of the discharge water channel 36 in the side view. Therefore, as in the first embodiment, the above-mentioned effects (B1) and (B2) can be obtained.

Also in the present embodiment, as in the first embodiment, the injection range S3 of the injection flow F1 is set so as to be within the discharge range of the film-like flow F3. Therefore, the effect of (C) described above can be obtained as in the first embodiment.

(Third Embodiment) Refer to FIGS. 9 and 10. The discharge device 10 of the present embodiment has a different injection water channel 34 as compared with the first embodiment. The device main body 32 includes a mist nozzle 46 incorporated in the device main body 32. An injection water channel 34 is provided inside the mist nozzle 46.

The injection water channel 34 of the mist nozzle 46 can inject the mist flow F5 as the injection flow F1 after converting the water supplied from the injection flow water channel 22b of the water supply channel 22 into a mist. The mist flow F5 here means a plurality of mist flows. In this figure, the injection range of the mist flow F5 is indicated by a chain line. The injection water channel 34 can inject the mist flow F5 so as to radiate from the injection hole 38. The mist nozzle 46 of this embodiment is a one-fluid nozzle. In addition to this, the mist nozzle 46 may be a two-fluid nozzle. Since the one-fluid nozzle does not require a compressor other than the pump 26, the discharge system 18 can be downsized and the cost can be reduced.

In the first embodiment, as the droplets of the injection flow F1 to be blocked by the film-like flow F3, the droplets generated by the collision between the injection flow F1 of the water jet F2 and an object such as a user have been described. In the present embodiment, the droplets of the jet flow F1 are composed of the mist itself of the mist flow F5. The membranous flow F3 can limit the scattering range of the mist by blocking the flow of the droplets of the jet flow F1, that is, the flow of the mist.

The effect of this embodiment will be explained. The discharge water channel 36 of the present embodiment also discharges the end-film-like film-like flow F3. Therefore, the effect of (A) described above can be obtained as in the first embodiment.

When the injection flow F1 is the mist flow F5, the scattering of the mist flow F5 can be blocked by the film-like flow F3 while directly bathing the mist flow F5 in a wide range. Therefore, for example, it is possible to prevent the mist flow F5 from scattering on the user's face by the film-like flow F3 while directly bathing the mist flow F5 over a wide range of the body, and it is possible to give the user a good feeling of use.

Also in this embodiment, the injection range of the injection flow F1 (mist flow F5) is set so as to be within the discharge range of the film-like flow F3 in the front view. When the injection flow F1 is the mist flow F5, the "injection range" is the injection flow from the time when the injection water channel 34 is ejected to the time when the injection flow F3 hits either the membrane-like flow F3 or the fixed structure 42 under the following premise. The range that F1 actually passes through. This premise is that there is no object to be exposed to the membranous flow F3 and the jet flow F1, water of a constant flow rate is supplied to the jet water channel 34, and there is no wind. Also in this embodiment, the effect of (C) described above can be obtained as in the first embodiment.

Explain other modifications of each component.

Specific examples of the water supply equipment 12 are not particularly limited, and may be, for example, kitchen equipment, washroom equipment, toilet equipment, and the like. Specific examples of the bathtub 14 of the water supply facility 12 are not particularly limited, and for example, a sink such as a kitchen sink or a hand wash sink may be used. Specific examples of the base 30 of the water supply facility 12 are not particularly limited, and for example, a wall body for partitioning the interior space may be used.

The storage tank 20 of the discharge system 18 is not limited to the bathtub 14 of the water supply facility 12, and may be provided separately from the bathtub 14, for example. The valve device 24 of the discharge system 18 may not be present.

In addition to the first operation mode, the valve device 24 may be able to perform the following second operation mode and third operation mode. In the second operation mode, by pumping the water sucked from the storage tank 20 by the pump 26, the water is supplied only to the injection water passage 34 of the discharge device 10 through the injection flow water passage 22b of the water supply passage 22. As a result, only the injection flow F1 is injected from the injection channel 34. In the third operation mode, by pumping the water sucked from the storage tank 20 by the pump 26, the water is supplied only to the discharge water channel 36 of the discharge device 10 through the film-like diversion water channel 22c of the water supply channel 22. As a result, only the membranous flow F3 is discharged from the discharge water channel 36.
-Second operation mode: A mode in which the jet diversion canal 22b and the upstream side canal 22a are communicated with each other and the membrane diversion canal 22c and the upstream side canal 22a are cut off.-Third operation mode: The membrane diversion canal 22c and the upstream side canal A mode in which the 22a is communicated and the communication between the injection diversion canal 22b and the upstream canal 22a is cut off.

The specific example of the discharge device 10 is not particularly limited, and may be configured as, for example, a shower device, a faucet device, or the like.

An example was described in which the base 30 to which the device main body 32 is fixed is the rim portion of the bathtub 14. The base 30 may be formed by an inner peripheral wall portion of the bathtub 14 provided below the upper surface opening of the bathtub 14, or may be formed by a wall body 16 of the water supply facility 12. The film-like flow F3 and the jet flow F1 may be discharged from the inner peripheral wall portion of the bathtub 14 and the device main body 32 fixed to the wall body 16.

An example was described in which the injection water channel 34 and the discharge water channel 36 are formed in a common device main body 32. In addition to this, the injection water channel 34 and the discharge water channel 36 may be formed in separate device main bodies 32.

The injection direction D1 of the injection water channel 34 may be set parallel to the discharge direction D2 of the discharge hole 40, or may be set upward from the discharge direction D2.

The injection range of the injection flow F1 may extend outside the discharge range of the film-like flow F3 when viewed from the front.

When the fluid element 44 is used as in the second embodiment, the specific example of the fluid element 44 is not particularly limited as long as the flow direction of the injection flow F1 can be changed with time. For example, a fluid element 44 that has an axial velocity component along a predetermined axis and a radial velocity component orthogonal to the axis, and the radial velocity component changes with time so as to rotate around the axis. May be used. As a result, the spiral injection flow F1 is radially injected from the injection water channel 34.

The injection water channel 34 of the second embodiment has described an example in which the water jet F2 is injected so that the flow direction changes with time. In addition to this, the injection water channel 34 may inject the water jet F2 so that the flow rate when exiting the injection water channel 34 changes with time. This can be achieved, for example, by providing a bubble supply unit capable of intermittently supplying bubbles to the water flowing through the injection channel 34. As a result, a region having a small flow rate and a region having a large flow rate can be formed in the flow direction of the water jet F2.

In this case, the thickness of the water film formed at the location where the water jet is exposed changes over time. Therefore, if the water jet F2 is exposed to a large flow rate at the timing when the thickness of the water film becomes thin, the water jet F2 is likely to be scattered from there.

According to this modification, as in (D) described above, even in a situation where the droplets of the water jet F2 are likely to be scattered, the droplets of the water jet F2 can be blocked by the membranous flow F3, and the scattering is effective. Can be prevented.

In order to obtain the same effect, the injection channel 34 may inject the injection flow F1 so that the flow rate when jumping out of the injection channel 34 changes with time between zero and a positive value. The injection channel 34 will intermittently inject the injection flow F1. This can be realized, for example, by providing a plurality of injection holes 38 at the downstream end of the injection water channel 34 and opening and closing the plurality of injection holes 38 by an impeller arranged in the injection water channel 34 (Japanese Patent Laid-Open No. 2014-140599). See Gazette).

The embodiments and modifications have been described in detail above. The above-described embodiments and modifications are merely specific examples. The contents of the embodiments and modifications should not be interpreted in a limited manner, and many design changes such as changes, additions, and deletions of components are possible. In the above-described embodiment, the content capable of such a design change is emphasized by adding the notation "embodiment". However, design changes are allowed even if there is no such notation. The hatching attached to the cross section of the drawing does not limit the material of the object to which the hatching is attached. Any combination of the above components is also valid. For example, any description of the other embodiment may be combined with the embodiment, or any description of the embodiment and the other modification may be combined with the modification.

The following technical ideas can be derived by generalizing the technical ideas embodied by the above embodiments and modifications.

In the first aspect, the discharge device of the second aspect may be capable of injecting a water jet so that either the flow direction or the flow rate when the injection water channel exits the injection water channel changes with time. .. According to this aspect, even in a situation where the water jet droplets are likely to scatter, the water jet droplets can be blocked by the membranous flow, and the scattering can be effectively prevented.

In any of the first to second aspects of the discharge device of the third aspect, the injection direction of the injection water channel may be set to be downward from the discharge direction of the discharge water channel in the side view. According to this aspect, it becomes easy for the injection flow to reach a place far from the injection water channel, and it becomes easy to further widen the range in which the injection flow can be directly exposed.

The discharge device of the fourth aspect may be set so that the injection range of the injection flow is within the discharge range of the film-like flow in the front view in any one of the first to third aspects. According to this aspect, by blocking the scattering of the jet stream forward and upward by the film-like flow, it is possible to reliably prevent the splash from scattering over a wide area.

F1 ... Injection flow, F2 ... Water jet, F3 ... Membrane flow, 10 ... Discharge device, 34 ... Injection channel, 36 ... Discharge channel.

Claims

An injection channel that can inject the injection flow forward and
A discharge water channel capable of discharging a membranous flow passing above the injection flow forward is provided.
The membranous flow is a discharge device having an endped film shape in a cross section orthogonal to the flow direction.
The discharge device according to claim 1, wherein the injection water channel can inject a water jet so that either the flow direction or the flow rate when exiting the injection water channel changes with time.
The discharge device according to any one of claims 1 to 2, wherein the injection direction of the injection water channel is set to be downward from the discharge direction of the discharge water channel in a side view.
The discharge device according to any one of claims 1 to 3, wherein the injection range of the injection flow is set so as to be within the discharge range of the film-like flow in a front view.