Mist screen connector and mist screen forming device

Abstract

To provide a mist screen formation device by which a uniformity of liquid densities of a mist display can be obtained.SOLUTION: A mist screen formation device 1000, which forms a mist screen S above the device, is constituted of a mist generator 1 generating mist by using water supplied from a water tank 1001, a mist rectifier 2 rectifying the generated mist, a mist guide 3 discharging mist after rectification onto a space above in a predetermined screen form, and an air jet device 5 provided on both sides of the mist guide 3 with an air guide 4 jetting air above and jetting the air in a predetermined form in the same direction as the mist. The mist screen S to be formed forms a three-layer structure consisting of an air layer, a mist layer, and an air layer by the jet of screen-form or membrane-form above the device and the jet of membrane-form air onto both sides.SELECTED DRAWING: Figure 25A1

Description

[Technical field]

[0001] The present invention relates to a mist screen connector and a mist screen forming device that display still or moving images by projecting light onto a mist screen using a projector or the like. [Background technology]

[0002] Conventionally, there has been proposed a mist display device as disclosed in Patent Document 1. This mist display device addresses the issue of a projected image being distorted due to disturbances in the droplet film / liquid film caused by external wind, by comprising a projection image estimated distortion data calculation unit that calculates the distortion of an image projected onto the droplet film, an image transformation matrix generation unit that calculates a correction value to subtract the calculated distortion, and a correction processing unit that corrects the image to be projected onto the droplet film using the calculated correction value. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-46711 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, when expanding the projection area of ​​the mist display, it is conceivable to line up a number of mist displays and connect the droplet films. Fig. 24 shows an example of connecting mist displays. When two mist displays 900 are lined up and the droplet films are connected, the droplet films of the mist display S are not formed up to the end of the device body 901, so there is a problem that an area 902 where no droplet film exists is generated at the connecting portion, or even if the droplet films fuse together toward the top, a streaky area with low droplet density is generated, and the uniformity of the droplet density of the mist display S cannot be obtained. The present invention has been made to solve such problems. [Means for solving the problem]

[0005] The mist screen connector of the present invention is arranged between an edge of one mist screen forming device and an edge of another mist screen forming device, with the two devices positioned close to each other in the direction in which the mist screens formed by each mist screen ejecting mist are continuous, and is characterized in that it has a pair of curved surfaces or inclined surfaces in the outward upward and downward directions, and that the pair of curved surfaces and inclined surfaces are arranged approximately symmetrically in the connecting direction and at a predetermined interval.

[0006] In the above invention, it is preferable that the airflow regulating piece further has a pair of curved surfaces or inclined surfaces in the inner vertical direction. Also, it is preferable that a pair of airflow regulating pieces having the curved surfaces or inclined surfaces in the outer vertical direction are provided, and the airflow regulating pieces are connected to each other by a beam portion.

[0007] The mist screen forming device of the present invention is characterized in that, when one mist screen forming device and another mist screen forming device are arranged close to each other in a direction in which the mist screens formed by each mist screen forming device ejecting mist are continuous, the main body edge of the one mist screen forming device faces the main body edge of the other mist screen forming device, and a curved surface or inclined surface is provided in the vicinity of the mist outlet and in the upward and downward directions on the outside.

[0008] In the above invention, it is preferable that the mist screen further has a curved surface or a slope in the up-down direction on the inside. Also, it is preferable that the curved surface or the slope is provided as a straightening piece by a beam portion on the edge of the main body arranged in close proximity to the mist screen generating device. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a mist screen connector according to a first embodiment of the present invention. [Diagram 2]FIG. 2 is a side view showing the mist screen shown in FIG. [Diagram 3] FIG. 2 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. [Figure 4] 10 is an explanatory diagram showing the operation of this mist screen connector. FIG. [Diagram 5] FIG. 11 is a side view showing a mist screen connector according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a plan view showing the mist screen connector shown in FIG. 5. [Figure 7] 1 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. FIG. [Figure 8] 10 is an explanatory diagram showing the operation of this mist screen connector. FIG. [Figure 9] FIG. 2 is a side view showing a mist screen connector according to the present invention. [Figure 10] FIG. 10 is a plan view showing the mist screen connector shown in FIG. 9. [Figure 11] FIG. 2 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. [Figure 12] 10 is an explanatory diagram showing the operation of this mist screen connector. FIG. [Figure 13] FIG. 11 is a side view showing a mist screen connector according to a fourth embodiment of the present invention. [Figure 14] FIG. 14 is a plan view showing the mist screen connector shown in FIG. [Figure 15] FIG. 2 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. [Figure 16] 10 is an explanatory diagram showing the operation of this mist screen connector. FIG. [Figure 17] FIG. 11 is a partial perspective view showing a mist screen forming device according to a fifth embodiment of the present invention. [Figure 18] FIG. 18 is a partial side view showing the mist screen forming device shown in FIG. [Figure 19]FIG. 18 is a partial plan view showing the mist screen forming device shown in FIG. [Figure 20] 1 is a partial side view showing a mist screen forming device according to the present invention. [Figure 21] 21 is a partial plan view showing the mist screen forming device shown in FIG. 20. [Figure 22] 4 is an explanatory diagram showing the operation of this mist screen forming device. FIG. [Diagram 23] FIG. 13 is an explanatory diagram showing a modified example of the mist screen connector of the present invention. [Figure 24] FIG. 13 is an explanatory diagram showing an example of connecting mist displays. [Figure 25A1] 1A and 1B are conceptual diagrams showing a mist screen forming device according to the present invention, in which (a) is a front view and (b) is a side view. [Figure 25A2] FIG. 2 is a conceptual diagram showing a forming mode of the mist screen of the present invention. [Figure 25A3] 1 is a configuration diagram showing a mist screen forming device according to a first embodiment of the present invention. [Figure 25A4] FIG. 25A3 is a side view of the mist screen forming device shown in FIG. [Figure 25A5] This is a cross-sectional view taken along line AA in FIG. 25A3. [Figure 25A6] FIG. 25A3 is a cross-sectional view taken along line BB of FIG. [Figure 25A7] FIG. 25A is a partially enlarged cross-sectional view of FIG. [Figure 25A8] FIG. 2 is an exploded view of the mist screen forming device, showing a state in which the air ejection device has been removed from the housing; [Figure 25A9] 3A and 3B are exploded views of the mist screen forming device, showing an external view and a cross-sectional view with the mist guide and air guide removed. FIG. [Figure 25A10] FIG. 2 is an exploded view of the mist screen forming device, showing an external view and a cross-sectional view showing a state in which a storage chamber of a mist rectifier has been removed. [Figure 25A11] FIG. 2 is an exploded view of the mist screen forming device, showing an external view and a cross-sectional view with a middle plate removed. [Figure 25A12] 2 is a schematic diagram of a passage of the mist screen forming device according to the present invention. FIG. [Figure 25A13] 4A and 4B are a cross-sectional view and a plan view of a guide portion. [Figure 25A14] FIG. 13 is a plan view showing a modified example of the guide portion. [Figure 25A15] FIG. 11 is a conceptual configuration diagram showing a mist screen forming device according to a second embodiment of the present invention. [Figure 25A16] FIG. 25A15 is a conceptual diagram showing the mist screen forming device shown in FIG. [Figure 25A17] 3A and 3B are schematic diagrams showing a guide portion and a form of formation of a mist screen, respectively. [Figure 25A18] FIG. 11 is a partial configuration diagram showing a mist screen forming device according to a third embodiment of the present invention. [Figure 25A19] FIG. 25A19 is a schematic diagram showing the structure of a mist screen formed by the guide portion shown in FIG. 25A18. [Figure 25A20] FIG. 11 is a configuration diagram showing a mist screen forming device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment 1) FIG. 1 is a perspective view showing a mist screen connector according to the first embodiment of the present invention. FIG. 2 is a side view (a) and a plan view (b) showing the mist screen shown in FIG. 1. FIG. 3 is a plan view showing the mist screen connector installed in a mist screen forming device. This mist screen connector 100 has a structure in which a pair of straightening pieces 1 are connected to each other by a beam portion 2. Each straightening piece 1 is fan-shaped in plan view and semicircular in side view. More specifically, each straightening piece 1 is a ginkgo leaf-shaped flat plate curved at a predetermined curvature to form a curved surface 3 (outer surface 3) in the outer vertical direction (indicated by the arrow in the figure), and the straightening pieces 1 are connected to each other by a straight beam portion 2, and the curved plate-like body gradually converges to form a shape and is integrated with the beam portion 2. By making it into such a shape, the curved surfaces 3 of the pair of straightening pieces 1 are provided approximately symmetrically and at a predetermined interval.

[0011] In addition, each flow straightening piece 1 is formed by curving a plate-like body, so that a curved surface 4 is formed in the inner vertical direction (indicated by the arrow in the figure). When mist adheres to this inner curved surface 4 and turns into water droplets, the water droplets flow downward along the curved surface 4.

[0012] The distance between the straightening pieces 1 is at least twice the length of the end of the main body 51 of the mist screen forming device 50, specifically the portion NM from the edge 50a of the outlet to the edge 50b of the main body cover where no mist is discharged. From another perspective, when the mist screen forming devices 50 are placed closely together, it is larger than the distance between the edge 50b of the outlet 50c of one mist screen forming device 50A and the edge 50b of the outlet 50c of another mist screen forming device 50B. On the other hand, if the distance between the straightening pieces 1 is too wide, the mist screens will not connect well, so this distance should be determined appropriately depending on the size of the mist screens, etc.

[0013] The curvature and radius of the straightening piece 1 are determined so that the mist discharged from the straightening piece 1 flows along the curved surface 3 by having a predetermined area. In addition, the area and shape of the inner surface 4 are determined in detail so that even if the mist hits the inner surface 4 and condenses, the water droplets caused by the condensation flow downward along the inner surface 4. Furthermore, the beam portion 2 is shaped so that the cross-sectional area in the direction perpendicular to the mist flow direction is small so that the mist discharged from the outlet 50c can easily pass through the beam portion 2. Preferably, the beam portion 2 is shaped like a rod or a strip extending in the vertical direction.

[0014] That is, the straightening piece 1 needs a certain area to perform the function of bending the mist flowing along the outer surface 3 and flowing it upward along the outer surface 3. Even if the mist that hits the inner surface 4 condenses on the surface, the water droplets fall before reaching the beam portion 2, and the beam portion 2 is axially or plate-like so as to support the pair of straightening pieces 1 and allow the flow of the mist to pass through with almost no disturbance and to prevent condensation. The beam portion 2 is at least larger than the distance between the edge 50b of the outlet 50c of the one mist screen forming device 50A and the edge 50b of the outlet 50c of the other mist screen forming device 50B, and can therefore be disposed across the gap between the edges 50b of the outlets 50c. Since no droplets are generated on the beam portion 2, even if the beam portion 2 is located above the gap between the end edges 50b, droplets do not fall into the gap, and therefore water does not drip into the main body of the mist screen forming device 50 and wet the floor.

[0015] The beams 2 are provided with a function of connecting the straightening pieces 1 to each other for easy handling and preventing mist from adhering to them and turning into water droplets and dripping, and are not limited to being linear as shown in the figure, so long as they have this function. Also, a drooping portion may be formed at the connection between the beams 2 and the plate-like body to prevent water droplets from moving to the center of the beams 2 (not shown).

[0016] 4 is an explanatory diagram showing the operation of this mist screen connector. First, two mist screen forming devices 50 are arranged side by side so that the discharged mist screens form a continuous surface. At this time, the main body 51 of one mist screen forming device 50A and the main body 51 of the other mist screen forming device 50B are arranged close to each other and are brought into contact with each other, and the discharged mist screens S are brought close to each other and connected like one large screen. Next, the mist screen connector 100 is placed on the discharge port 50c so as to span the gap between the main body edge 50b of the one mist screen forming device 50A and the main body edge 50b of the other mist screen forming device 50B.

[0017] Next, mist M is discharged from the discharge port 50c. The discharged mist M curves upward along the outer surface 3 of the mist screen connector 100, and connects the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure at the top of the mist screen connector 100. This allows the mist screens S to be neatly connected. Furthermore, at the beam portion 2, the discharged mist M passes upward almost as it is and merges with the connected mist screens S.

[0018] With the above configuration, the mist screen S is formed neatly and continuously even near the edges of the mist screen forming device 50, so there are no defects in the image. Furthermore, even if the mist M hits the inner surface 4 of the flow straightening piece 1 and condenses, the water droplets flow along the inner surface 4 of the flow straightening piece 1 and fall into the outlet 50c (the flow direction of the water droplets is indicated by the arrow in the figure). Therefore, water droplets do not drip on the connecting parts of the mist screen forming device 50.

[0019] (Embodiment 2) Fig. 5 is a side view showing a mist screen connector according to embodiment 2 of the present invention. Fig. 6 is a plan view showing the mist screen connector shown in Fig. 5. This mist screen connector 200 has a structure in which two curved plate bodies 201 with semicircular cross sections are arranged in a straight line and similar curved plate bodies 201 are placed on top of each other. The width of the curved plate bodies 201 is preferably approximately equal to the width of the mist screen S.

[0020] The length of the mist screen connector 200 is preferably at least twice the length of the end of the mist screen forming device 50, specifically the portion NM from the edge 50a of the outlet 50c to the edge 50b of the main body cover where no mist is emitted. From another perspective, when the mist screen forming devices 50 are placed closely together, it is greater than the distance between the edge 50b of the outlet 50c of one mist screen forming device 50A and the edge 50b of the outlet 50c of another mist screen forming device 50B.

[0021] A connecting plate 202 is provided at the lower end on the central side of the curved plate-like body 201. The back surface of this connecting plate 202 is provided with an attachment surface for adhesive tape or the like. Wall portions 209 are formed on both ends of the connecting plate 202 in the longitudinal direction. The length of the connecting plate 202 is made to be shorter than the length of the mist screen connector 200.

[0022] FIG. 7 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. FIG. 8 is an explanatory diagram showing the operation of this mist screen connector. First, two mist screen forming devices 50 are arranged side by side so that the mist screens discharged form a continuous surface. At this time, the main body 51 of one mist screen forming device 50A and the main body 51 of the other mist screen forming device 50B are arranged close to each other (including a contact state; the same applies below). Next, the mist screen connector 200 is placed on the discharge port 50c so as to span the gap between the main body edge 50b of the one mist screen forming device 50A and the main body edge 50b of the other mist screen forming device 50B. At this time, the mist screen connector 200 is attached and fixed to the main body edge 50b with the adhesive surface.

[0023] Next, mist M is discharged from the discharge port 50c. The discharged mist M flows upward along the outer surface 203 of the curved plate-like body 201 of the mist screen connector 200, and the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure are connected to each other at the top of the mist screen connector 200. As a result, the mist screens S are formed neatly and continuously even near the edges of the mist screen forming device 50, so there is no loss in the image.

[0024] Furthermore, even if the mist M hits the inner surface 204 of the curved plate-like body 201 and condenses, the water droplets flow along the inner surface 204 and fall into the outlet 50c. Even if water droplets fall onto the connecting plate 202, they flow from both ends of the connecting plate 202 to the outlet 50c, and the wall 209 prevents the water droplets from dripping onto the connecting portions of the mist screen forming device 50.

[0025] (Embodiment 3) Fig. 9 is a side view showing the mist screen connector according to the present invention. Fig. 10 is a plan view showing the mist screen connector shown in Fig. 9. This mist screen connector 300 is made of a curved plate-like body 301 having a semicircular cross section. It is preferable that the width of the curved plate-like body 301 is approximately equal to the width of the mist screen.

[0026] The length of the mist screen connector 300 is preferably at least twice the length of the end of the mist screen forming device 50, specifically the portion NM from the edge 50a of the outlet 50c to the edge 50b of the main body cover where no mist is emitted. From another perspective, when the mist screen forming devices 50 are placed closely together, it is greater than the distance between the edge 50b of the outlet 50c of one mist screen forming device 50A and the edge 50b of the outlet 50c of another mist screen forming device 50B.

[0027] FIG. 11 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. FIG. 12 is an explanatory diagram showing the operation of this mist screen connector. First, two mist screen forming devices 50 are arranged side by side so that the mist screens discharged form a continuous surface. At this time, the main body 51 of one mist screen forming device 50A and the main body 51 of the other mist screen forming device 50B are arranged close to each other. Next, the mist screen connector 300 is placed on the discharge port 50c so as to span the gap between the main body edge 50b of the one mist screen forming device 50A and the main body edge 50b of the other mist screen forming device 50B.

[0028] Next, mist M is discharged from the outlet 50c. The discharged mist M curves upward along the outer surface 303 of the curved plate-like body 301 of the mist screen connector 300, and connects the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure at the top of the mist screen connector 300.

[0029] As a result, the mist screens S are formed neatly and continuously even near the edges of the mist screen forming device 50, so there is no loss in the image. Furthermore, even if the mist M hits the inner surface 304 of the curved plate-like body 301 and condenses, the water droplets flow along the inner surface 304 and drop into the outlet 50c.

[0030] (Embodiment 4) Fig. 13 is a side view showing a mist screen connector according to embodiment 4 of the present invention. Fig. 14 is a plan view showing the mist screen connector shown in Fig. 13. This mist screen connector 400 is made of a solid body having a semicircular or semicylindrical cross section. It is preferable that the width of the solid body is approximately equal to the width of the mist screen.

[0031] The length of the mist screen connector 400 is preferably at least twice the length of the end of the mist screen forming device 50, specifically the portion NM from the edge 50a of the outlet 50c to the edge 50b of the main body cover where no mist is emitted. From another perspective, when the mist screen forming devices 50 are arranged adjacent to each other, it is greater than the distance between the edge 50b of the outlet 50c of one mist screen forming device 50A and the edge 50b of the outlet 50c of the other mist screen forming device 50B.

[0032] FIG. 15 is a plan view showing the state in which the mist screen connector is installed on the mist screen forming device. FIG. 16 is an explanatory diagram showing the operation of this mist screen connector. First, two mist screen forming devices 50 are arranged side by side so that the mist screens discharged form a continuous surface. At this time, the main body 51 of one mist screen forming device 50A and the main body 51 of the other mist screen forming device 50B are arranged close to each other. Next, the mist screen connector 400 is placed on the discharge port 50c so as to span the gap between the main body edge 50b of the one mist screen forming device 50A and the main body edge 50b of the other mist screen forming device 50B.

[0033] Next, mist M is discharged from the discharge port 50c. The discharged mist M curves upward along the outer surface 403 of the solid body of the mist screen connector 400, and connects the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure at the top of the mist screen connector 400. This allows the mist screens S to be formed neatly and continuously even near the edges of the mist screen forming device 50, so there is no loss in the image.

[0034] (Embodiment 5) Fig. 17 is a partial perspective view showing a mist screen forming device according to embodiment 5 of the present invention. Fig. 18 is a partial side view showing the mist screen forming device shown in Fig. 17. Fig. 19 is a partial plan view showing the mist screen forming device shown in Fig. 17. This mist screen forming device 60 has a configuration in which the mist screen connector 100 according to embodiment 1 is divided into two and provided in a main body 61 of the mist screen forming device 60.

[0035] In this mist screen forming device 60, a straightening piece 1 is disposed near an edge 50a of an outlet 50c, and this straightening piece 1 is fixed near the center of an edge 50b of a main body 61 by a beam portion 62. Each straightening piece 1 is fan-shaped in a plan view and semicircular in a side view. More specifically, each straightening piece 1 is a ginkgo leaf-shaped flat plate curved at a predetermined curvature to form a curved surface 3 (outer surface 3) in the outward vertical direction (indicated by the arrow in the figure), and the curved flat plate gradually converges into a shape that is integrated with the beam portion 62. The beam portion 62 extends horizontally and is bent downward at the edge 50b and fixed to the main body 61.

[0036] In addition, each flow straightening piece 1 is formed by curving a plate-like body, so that a curved surface 4 is formed in the inner vertical direction (indicated by the arrow in the figure). When mist adheres to this inner curved surface 4 and turns into water droplets, the water droplets flow downward along the inner surface 4.

[0037] The distance between the straightening piece 1 and the edge 50b of the main body 61 is equal to or greater than the portion NM from the edge 50a of the outlet 50c to the edge 50b of the main body cover where mist is not discharged. From another perspective, when the mist screen forming devices 60 are arranged adjacent to each other, it is greater than half the distance between the edge 50b of the outlet 50c of one mist screen forming device 50A and the edge 50b of the outlet 50c of the other mist screen forming device 50B.

[0038] The curvature and radius of the straightening piece 1 are determined so that the mist discharged from the straightening piece 1 flows along the upper surface of the curved surface 3 by having a predetermined area. In addition, the area and shape of the inner surface 4 are determined in detail so that even if the mist hits the inner surface 4 and condenses, the water droplets caused by the condensation will fall downward along the inner surface 4. Furthermore, the beam portion 62 is shaped so that the cross-sectional area in the direction perpendicular to the mist flow direction is small so that the mist discharged from the outlet 50c can easily pass above the beam portion 62. Preferably, the beam portion 62 is shaped like a rod or a strip extending in the vertical direction.

[0039] In other words, the straightening piece 1 requires a certain area to perform the function of bending the mist flowing along the outer surface 3 along the curved surface 3 and directing it upwards, and on the other hand, even if the mist flowing along the inner surface 4 condenses on the surface, the water droplets will fall before reaching the beam portion 62, and the beam portion 62 is axial or plate-shaped to support the straightening piece 1 and allow the mist to pass through with almost no disturbance to the flow, while preventing condensation.

[0040] The operation of the mist screen connector will now be described. First, two mist screen forming devices 60 are arranged side-by-side so that the mist screens they emit form a continuous surface. At this time, the main body 61 of one mist screen forming device 60A and the main body 61 of the other mist screen forming device 60B are arranged close to each other and in contact with each other.

[0041] In this state, the main body edge 50b of one mist screen forming device 60A faces the main body edge 50b of the other mist screen forming device 60B, and the straightening piece 1 having the curved surface 3 in the vertical outward direction is positioned near the mist outlet 50c. Also, with this structure, the curved surfaces 3 of the pair of straightening pieces 1 are positioned approximately symmetrically and with a predetermined distance between them.

[0042] Next, mist M is discharged from the outlet 50c. The discharged mist M curves upward along the outer surface 3 of the straightening piece 1, and at its upper part, the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure are connected. Furthermore, at the beam portion 62, the discharged mist M passes directly upward and merges with the connected mist screen S.

[0043] As a result, the mist screen S is formed neatly and continuously even near the edges of the mist screen forming device 50, so there are no defects in the image. Furthermore, even if the mist M hits the inner surface 4 of the flow straightening piece 1 and condenses, the water droplets flow along the inner surface 4 of the flow straightening piece 1 and fall into the outlet 50c (the flow direction of the water droplets is indicated by the arrow in the figure). Therefore, water droplets do not drip on the connecting parts of the mist screen forming device 60.

[0044] Furthermore, in this configuration, since the straightening pieces 1 are fixed to the main body 61, the mist screens S can be neatly connected simply by properly lining up the mist screen forming devices 60 in a row. The straightening pieces 1 are provided on both sides of the main body 61 (the other side is not shown).

[0045] (Embodiment 6) Figure 20 is a partial side view showing the mist screen forming device according to the present invention. Figure 21 is a partial plan view showing the mist screen forming device shown in Figure 20. This mist screen forming device 70 has a configuration in which the mist screen connector 300 according to embodiment 3 is divided into two and integrated into the main body 71 of the mist screen forming device 70 as a straightening piece 72.

[0046] Straightening piece 72 is a curved plate-like body with a sail-shaped cross section, and vertically extending legs 73 are attached to main body 71. Straightening piece 72 has a predetermined area, and its curvature and radius are determined so that the flow of the ejected mist flows along the upper surface of curved surface 303. Furthermore, the area and shape of inner surface 304 are determined in detail so that even if mist hits inner surface 304 and condenses, water droplets caused by the condensation will flow downward along inner surface 304.

[0047] 22 is an explanatory diagram showing the operation of this mist screen forming device. First, two mist screen forming devices 70 are arranged side by side so that the mist screens they eject form a continuous surface. At this time, the main body 71 of one mist screen forming device 70A and the main body 71 of the other mist screen forming device 70B are arranged close to each other and in contact with each other.

[0048] In this state, the main body edge 50b of one mist screen forming device 70A faces the main body edge 50b of the other mist screen forming device 70B, and the straightening pieces 72 having curved surfaces 303 in the vertical direction on the outside are positioned near the mist outlet 50c. Also, with this structure, the curved surfaces 303 of the pair of straightening pieces 72 are positioned approximately symmetrically and with a predetermined distance between them.

[0049] Next, mist M is discharged from the discharge port 50c. The discharged mist M curves upward along the outer surface 303 of the flow straightening piece 72, and at its upper part, the ends of the mist screen S on the right side of the figure and the mist screen S on the left side of the figure are joined together. This allows the mist screen S to be formed neatly and continuously even near the edge of the mist screen forming device 70, so there is no loss in the image.

[0050] Furthermore, even if the mist M hits the inner surface 304 of the flow straightening piece 72 and condenses, the water droplets flow along the inner surface 304 of the flow straightening piece 72 and drop into the outlet 50c (the flow direction of the water droplets is indicated by the arrow in the figure). Therefore, water droplets do not drip onto the connecting parts of the mist screen forming device 70.

[0051] In the case of such a configuration, since the straightening pieces 72 are fixed to the main body 71, the mist screens S can be neatly connected simply by correctly lining up the mist screen forming devices 50. The straightening pieces 72 are provided on both sides of the main body 71 (not shown).

[0052] (Modification) In the above embodiments 1 to 6, the curved surface may be an inclined surface. Fig. 23 is an explanatory diagram showing a modified example of the mist screen connector of the present invention, where (a) is a perspective view, (b) is a side view, and (c) is a plan view. In this mist screen connector 90, the shape of the straightening piece 1 of the mist screen connector 100 according to embodiment 1 is triangular in plan view and diagonally linear in side view. This straightening piece 91 forms inclined surfaces 93, 94 in the outer vertical direction and the inner vertical direction while being supported symmetrically at a predetermined interval by the beam portion 2.

[0053] The outer vertical inclined surface 93 functions to bend the mist along the inclined surface 93 and flow upward. When the mist adheres to the inner inclined surface 94 and turns into water droplets, the water droplets flow downward along the inclined surface 94. Thus, in the present invention, the curved surface and the inclined surface have substantially the same function. The configurations in which the curved surface is replaced with the inclined surface according to the second to sixth embodiments are not shown in the drawings.

[0054] (Example of mist screen configuration) Next, an example of a mist screen forming device using the mist screen connector will be specifically described. The reference symbols described below refer to the reference symbols shown in FIG. 25A1 and subsequent figures. The mist screen connectors according to the first to fourth embodiments of the present invention are preferably used to connect the mist layers MS described below when the mist screen forming devices described below are arranged side by side. In addition, by using the mist screen forming devices according to the fifth and sixth embodiments of the present invention that have the configurations described below, stable mist screens can be neatly connected.

[0055] FIG. 25A1 is a conceptual diagram showing the mist screen forming device according to the present invention, where (a) is a front view and (b) is a side view. FIG. 25A2 is a conceptual diagram showing a forming mode of the mist screen of the present invention. This mist screen forming device 1000 forms a mist screen S above the device, and is composed of a mist generating device 1 that generates mist using water supplied from a water tank 1001, a mist rectifier 2 that rectifies the generated mist, a mist guide 3 that ejects the rectified mist in a predetermined screen shape into the space above, and an air ejection device 5 that ejects air upward and has air guides 4 that eject the air in a predetermined screen shape in the same direction as the mist, both sides of the mist guide 3. An image is projected onto this mist screen S by a general-purpose projector P.

[0056] As shown in Fig. 25A2, the mist screen S formed is formed by spraying mist in a screen or film shape above the device, with film-like air sprayed on both sides, forming a three-layer structure consisting of an air layer AS, a mist layer MS, and an air layer AS in the screen thickness direction. By sandwiching the mist layer MS between the air layers AS, it is possible to prevent the mist from diffusing upward (downstream of the flow), so the mist screen S can be stabilized and a clear image can be formed. Specific embodiments of the present invention are described below.

[0057] FIG. 25A3 is a configuration diagram showing a mist screen forming device according to the first embodiment of the present invention. FIG. 25A4 is a side view of the mist screen forming device shown in FIG. 25A3. FIG. 25A5 is an AA cross-sectional view of FIG. 25A3. FIG. 25A6 is a BB cross-sectional view of FIG. 25A3. This mist screen forming device 100 is composed of a mist generating device 1 arranged in the center of the lower inside of a main body housing 101, a mist rectifier 2 arranged on the upper part of the mist generating device 1 to rectify the generated mist, a mist guide 3 arranged on the upper part of the mist rectifier 2 to spray the rectified mist in a screen shape into the space above, and an air jetting device 5 arranged on both sides of the mist generating device 1 and having air guides 4 arranged on both sides of the mist guide 3 to spray air upward and spray the air in a screen shape. These are installed inside the main body housing. The main body housing 101 is made of a metal plate and is generally a rectangular parallelepiped that is long in one direction, with the longitudinal direction of the upper part forming a slope 101a. The air guide 4 and the mist guide 3 form a guide section 6.

[0058] As shown in the above figures and the partially enlarged cross-sectional view of Figure 25A7, the mist generator 1 includes a rectangular parallelepiped housing 11 that temporarily stores the generated mist, an ultrasonic transducer drive unit 12 that generates mist and is located at the bottom of the housing 11, a spray nozzle 14 that is generally cylindrical, has a truncated cone shape in side view, has holes 15 on the side for supplying spray liquid to the ultrasonic transducer 13, and is open at the top and bottom, and centrifugal fans 40 are provided on both sides of the side of the housing 11. The spray liquid is stored at the bottom of the housing 11 up to a water level at which the 12 and 14 are submerged, and the spray liquid is turned into mist by the ultrasonic transducer 13 attached below the 14. The inside of the housing 11 is divided into two by a partition plate 15.

[0059] Fig. 25A8 to Fig. 25A11 are exploded views of the mist screen forming device. Fig. 25A8 is a three-sided view showing the state where the air ejection device is removed from the housing. Fig. 25A9-1 and Fig. 25A9-2 are an external view and a cross-sectional view showing the state where the mist guide and the air guide are removed. Fig. 25A10 is an external view and a cross-sectional view showing the state where the storage chamber of the mist rectifier is removed. Fig. 25A11 is an external view and a cross-sectional view showing the state where the middle plate is removed.

[0060] 25A11(C) and (d) show the exposed top plate, which serves as a partition wall between the mist generator 1 and the housing 11. Thus, a rectangular opening 17 is provided in the top plate 16 at the top of the housing 11 for connection to the mist generator 1. This opening 17 is located on one side of the central axis in the longitudinal direction. Centrifugal fans 40 are provided on both sides of the side of the housing 11 in order to send air to each of the compartments inside the divided housing 11. Power of a predetermined frequency is supplied to the ultrasonic transducer 13 from the transducer 12 (not shown). A water supply port is connected to the bottom of the housing 11, and the water supply port is connected to the spray liquid tank 1001 via a pump (not shown).

[0061] A mist rectifier 2 is disposed on the top of the mist generator 1. As shown in Fig. 25A8 to Fig. 25A11, the mist rectifier 2 is composed of a passage chamber 21 and a storage chamber 22, and has a cross-sectional shape in the short direction that is approximately triangular or mountain-shaped. As shown in the schematic diagram of the passage in Fig. 25A12 and Fig. 25A9-2(d), the mist rectifier 2 forms a mist passage 23 inside, and specifically, a passage 23a is formed from approximately the center in the longitudinal direction to both left and right ends, and is bent and inverted at both ends to form a passage 23b adjacent to the passage 23a via a partition wall 24.

[0062] In other words, a partition plate (partition wall 24) is provided in the longitudinal center of the longitudinal rectangular parallelepiped, and the partition plate is open at both ends to form a passage 23 through which mist flows from the central position to both sides and then returns to the central direction. In order to form such a passage 23, a partition wall 24 is provided in the center of the central longitudinal direction inside the housing 21 of the mist rectifier 2, both ends of which form gaps with both end side surfaces of the housing 21, and curved plates 25 that are curved horizontally to improve the flow of mist are provided at both longitudinal ends of this housing 20.

[0063] More specifically, as shown in Fig. 25A10(c), the partition wall 24 is provided on the lower surface of the top plate 25 of the housing 21. Moreover, the partition wall 24 is provided in the longitudinal center of the middle plate 26. Furthermore, as shown in Fig. 25A11(d), when the middle plate 26 is removed, the bottom plate 16 of the housing 21 is exposed, and the inlet 28 (opening 17) is exposed.

[0064] Next, a bottom plate 27 is connected to the portion of the mist generator 1 connected to the opening 17, and the bottom plate 27 is provided with a rectangular mist inlet 28 of a predetermined shape so as to cover the opening 17. The mist inlet 28 is located on one side of the longitudinal bulkhead of the bottom plate 27. As shown in FIG. 25A10(d), a plurality of holes 29 are provided in a substantially linear manner in the middle plate 26 of the housing 21. The holes 29 are small in the longitudinal center and larger toward both ends. This is because the mist flowing from both ends collides in the center of the passage, so that the pressure in the center of the passage increases. Therefore, the hole 29 in the center of the passage is made small, and the holes 29 on both ends, where the pressure is lower than that in the center, are made large, so that the movement of the mist to the storage chamber 22 provided in the upper part is made uniform.

[0065] It is preferable to provide a difference of 2 to 3 times in area ratio between the most central hole 29 and the most end side hole 29. In this way, even if a pressure difference occurs in the passage 23, the mist can be moved uniformly to the storage chamber 22. In addition, in this embodiment, the holes 29 are four on each side symmetrically in the longitudinal direction, and the distance between the holes 29 is wider between the first hole 29a and the second hole 29b than between the second hole 29b and the third hole 29c, and between the third hole 29c and the fourth hole 29d. This is because if the holes 29 are moved closer to the center, the mist will be concentrated too much in the center. In addition, the positions of the holes 29 in the short direction are approximately the same from the first hole 29a to the fourth hole 29d in the center. This is to move them closer to almost directly below the discharge port described later.

[0066] The storage chamber 22 has a substantially triangular cross section, as shown in, for example, FIG. 25A9-2(c) and (d), and a strip-shaped outlet 71 is provided at the top. The dimension (thickness) of the outlet 71 in the short direction is the thickness of the projection surface of the mist screen S. By making the cross section of the storage chamber 22 substantially triangular or mountain-shaped, it becomes difficult for stagnant mist to occur. The desired flow rate is obtained by narrowing the outlet 71. The thickness (band width) of the outlet 71 needs to be thick enough to form the mist screen S, and conversely, it is not preferable for it to be too thick. In particular, when used as a rear projection screen, the image will become blurred, so the thickness of the outlet 71 is set to be uniform at least in the projection range, and the flow rate of the mist is set to be a speed that can maintain the thickness.

[0067] The air ejection devices 5 are arranged on both sides of the mist generating device 1, as shown in FIG. 25A5. The air ejection device 5 is a device that ejects air not containing mist upward, and is composed of a housing 51 that is provided to be connected to the mist generating device 1, a plurality of axial flow fans 52 provided on the side of the housing 51, and an air ejection port 53 that opens at the top of the housing 51. The air ejection port 53 is inclined to match the shape of the main housing 101, and is shaped along the mountain-shaped slope of the storage chamber 22. The air ejection device 5 is structured to be approximately separated on both sides by the mist generating device 1, but as shown in FIG. 25A6, the internal spaces are connected in the space around the centrifugal fan 40 of the mist generating device 1, and therefore the wind from the axial flow fan 52 is supplied into the housings 51 of both air ejection devices 5. This makes the air ejected from the air ejection device 5 more uniform.

[0068] Note that, as long as the air jetting device 5 and the mist generating device 1 are configured within the main body housing 101, the housings may be separate and independent, or a structure may be adopted in which some metal sheets are shared. In other words, as long as the air jetting devices 5 can be configured on both sides of the mist generating device 1, the specific housing structure is not limited to the example shown in the figure.

[0069] As shown in FIG. 25A6, the mist guide 3 is connected to the outlet 71 of the mist rectifier 2. As shown in the enlarged view of FIG. 25A13 ((a) is a cross-sectional view, and (b) is a partial plan view), the mist guide 3 constitutes the air guide 4 of the air ejection device 5 on both sides. In the example of the figure, the mist guide 3 and the air guide 4 are configured as an integrated guide part 6, and a honeycomb structure is formed by regularly arranging a number of regular hexagonal cylindrical bodies. Each cylindrical body has a role of a guide, and in this configuration, the cylindrical body located directly above the outlet 71 becomes the mist guide 3 (the part surrounded by the dashed line in FIG. 25A13(b)), and the cylindrical body located directly above the air ejection port 53 becomes the air guide 4.

[0070] The thickness of the honeycomb structure (length of the cylindrical body) is set so that it can guide the mist and air that enters in a turbulent state, align the flow, and spray out directly above the guide section 6. As a result, the mist screen S is sprayed out as a three-layer structure consisting of an air layer AS, a mist layer MS, and an air layer AS, as shown in FIG. 25A2. In the configuration in the same figure, the thickness of the air layer AS is made thicker than the thickness of the mist layer MS. Specifically, an air layer AS is formed that is at least twice (but not more than 10 times) thicker than the mist layer MS. If the mist layer MS is thick, it becomes difficult to view the image when it is formed by rear projection, so a thinner mist layer MS is preferable.

[0071] The mist guide 3 is not limited to a honeycomb structure consisting of a cylindrical body with a hexagonal cross section. For example, as shown in FIG. 25A14(a), a honeycomb structure may be used in which a large number of cylindrical bodies 61 with a square cross section are regularly arranged. Also, as shown in FIG. 25A14(b), a honeycomb structure may be used in which a large number of cylindrical bodies 62 with a triangular cross section are regularly arranged. Furthermore, as shown in FIG. 25A14(c), a honeycomb structure may be used in which strip-shaped cylindrical bodies 64 with flow straightening fins 63 provided therein are connected in the width direction. Note that the honeycomb structure of the present application includes at least the structure shown in FIG. 25A14. The height of the mist guide 3 needs to be large enough to make the mist and air flow stable. The guide effect is enhanced by making the cross-sectional area of ​​each cylindrical body smaller, but if it is too small, the mist flow is hindered by water droplets attached to the inside of the cylindrical body, so it is preferable to make it 20 to 40 millimeters square.

[0072] The mist screen forming device 100 also has a mist control section that controls the generation of mist by the mist generating device 1 and the driving of the centrifugal fan 40, and an air control section that controls the driving of the axial fan 52 of the air jetting device 5. The mist control section detects the water level in the housing 11 by the output of a water level sensor (not shown) attached to the housing 11, while driving a pump to control the water level in the housing 11 within a certain range, and supplies power to the ultrasonic transducer driving unit 12 to adjust the amount of mist generated. The centrifugal fan 40, which has an adjustable air volume, is driven to control the amount and speed of mist discharged from the discharge port 71. The air control section adjusts the amount and speed of air discharged from the air discharge port 53 by controlling the driving of the axial fan 52.

[0073] Next, the operation of this mist screen forming device 100 will be described. To form a screen, first, water is supplied from the spray liquid tank 1001 into the housing 11 via a pump, and the ultrasonic transducer driving unit 12 is driven to generate mist within the housing 11. This mist is sprayed into the housing 11 from the tip of the spray nozzle 14. Air is forcefully introduced into the housing 11 by the centrifugal fan 40. The mist within the housing 11 moves into the mist rectifier 2 from the opening 17 (mist inlet 28) at the top.

[0074] The mist that moves into the mist rectifier 2 first flows from the center to both ends in the internal passage 23, then smoothly reverses at the curved plates 25 at both ends and returns to the center. The mist flows from both sides collide near the center of the passage 23. In this flow in the passage 23, the mist moves from multiple holes 29 provided at the upper part of the passage 23 to the storage chamber 22. The multiple holes 29 have large areas at both ends and become smaller toward the center, so that the mist is supplied evenly to the storage chamber 22. When the mist accumulates in the storage chamber 22, the internal pressure causes the mist to be discharged from the outlet 71 at a constant flow rate. The discharged mist is guided by the mist guide 3 to make the flow smooth, and is sprayed upward from the upper end in a screen-like shape.

[0075] Meanwhile, in the air ejection device 5, a large number of axial flow fans 52 are driven to introduce a large amount of air into the housing 51. The introduced air is ejected from air ejection ports 53 opening at the top of the housing 51 and reaches the air guide 4, where the air flow is adjusted and ejected upward from the upper end. This air is ejected onto both sides of the mist screen, sandwiching the mist screen. It is preferable that the air flow speed is faster than the mist flow speed. The flow speed is adjusted by controlling the drive of each of the axial flow fans 52 with an air control unit.

[0076] Furthermore, the air ejection device 5 sandwiches the mist layer MS with the air layer AS to prevent the mist of the mist layer MS from diffusing. That is, the air layer AS forms a screen-like space and confines the mist inside. In this way, the mist layer MS is prevented from diffusing, and the thickness of the mist layer MS can be maintained to a desired height. As a result, the image projected on the mist layer MS can be stabilized in the vertical direction (the direction of the mist flow). In addition, since the air layer AS is thicker than the mist layer MS, even if it receives the surrounding air flow in the usage environment, such as the wind generated by an air conditioner or when a person moves, the surface layer of the air layer AS can absorb the wind and incorporate it into the flow, so the mist layer MS is less susceptible to the air condition of the usage environment. In particular, the effect is enhanced when the air layer AS flows quickly and thickly.

[0077] An image is projected by a projector P onto the mist screen S thus formed. This projection light passes through the air layer AS of the mist screen S and is reflected by the surface of the mist layer MS on the side where the projector P is installed, forming a desired image or video.

[0078] (Embodiment 2) FIG. 25A15 is a conceptual diagram showing a mist screen forming device according to the second embodiment of the present invention. FIG. 25A16 is a conceptual diagram showing the mist screen forming device shown in FIG. 25A15. This mist screen forming device 100 forms a mist screen S in the downward direction, and is configured by arranging from the upper side of the device a mist generating device 210 that generates mist using water supplied from a water tank, a mist rectifier 220 that rectifies the generated mist, a mist guide 203 that ejects the rectified mist in a predetermined shape upward, and an air ejection device 205 that ejects air upward and has air guides 204 that eject the air in a predetermined shape on both sides of the mist guide 203. An image is projected onto this mist screen S by a general-purpose projector. The air guide 204 and the mist guide 203 form a guide section 206.

[0079] The mist generator 210 has a housing 211 which is a rectangular parallelepiped elongated in one direction as a whole for temporarily storing the generated mist, a tank section 201 for storing the spray liquid surrounded by the bottom and side surfaces of the housing 211 and a partition plate 212, an ultrasonic transducer drive unit 213 arranged on the bottom surface of the tank 201, a spray nozzle 230 which is provided directly above the ultrasonic transducer drive unit 213 and is generally cylindrical, has a truncated cone shape in side view, and is open at the top and bottom, and a centrifugal fan 240 provided on the side surface of the housing 211. An ultrasonic transducer is attached to the connection portion between the spray nozzle 230 and the ultrasonic transducer drive unit 213 (not shown), and the side surface of the spray nozzle 230 has a hole (not shown) for supplying the spray liquid to the ultrasonic transducer.

[0080] The bottom plate at the bottom of the housing 211 is opened for connection with the mist rectifier 220. The ultrasonic transducer driving unit 213 is connected to a driving device (not shown) that supplies power of a predetermined frequency. A water supply port is connected to the bottom of the tank 201. The water supply port is connected to a spray liquid tank via a pump (not shown).

[0081] A mist rectifier 220 consisting of a passage chamber 221 and a storage chamber 222 is disposed at the bottom of the mist generator 210. As shown in FIG. 25A16, the cross section of the mist rectifier 220 in the short direction is an approximately inverted triangle or an inverted mountain shape. The mist rectifier 220 forms a mist passage 223 inside, and an opening provided at the bottom of the bottom plate of the housing 211 communicates with the mist passage 223 as an inlet 228. Specifically, the passage 223 is formed from one end in the longitudinal direction to the other end, and is bent and inverted at the other end to form a passage 223 adjacent to the passage via a partition wall 224. A curved plate 225 that is curved horizontally to improve the flow of the mist is provided at the other end.

[0082] A plurality of holes 229 are provided in the bottom plate of the housing 211 of the path 223. The holes 229 are formed so as to be smaller on the downstream side of the passage 223. This is because the mist hits the wall at the end of the passage and the pressure at the end of the passage increases, so by making the holes 229 at the end of the passage smaller and making the holes 229 on the upstream side larger, the movement of the mist to the storage chamber 222 provided further below is made uniform.

[0083] The storage chamber 222 has a generally triangular cross section, with a band-shaped outlet 271 provided at its lower apex. The dimension (thickness) of the outlet 271 in the short direction becomes the thickness of the projection surface of the mist screen S. By making the cross section of the storage chamber 222 a generally inverted triangle or inverted mountain shape, no stagnant mist is generated. Then, by narrowing the outlet 271, a desired flow rate can be obtained. The thickness of the outlet 271 is set from the same perspective as in the first embodiment.

[0084] The air jetting devices 205 are disposed at a fixed distance on both sides of the mist generating device 210. The air jetting device 205 has a structure for jetting air downward, and is composed of a box-shaped housing 251, a plurality of axial flow fans 252 provided on the side of the housing 251, and an air outlet 253 opening at the bottom of the housing 251.

[0085] The mist guide 203 is connected to the outlet 271 of the mist rectifier 220. The air guide 204 is connected to the air outlet 253 of the air ejection device 205. The mist guide 203 and the air guide 204 are spaced apart from each other on both sides of the mist guide 3 as shown in FIG. 25A17(a). In the example shown in the figure, the mist guide 203 and the air guide 204 are integrally configured to form a honeycomb structure in which a number of regular hexagonal cylindrical bodies are regularly arranged. Each cylindrical body has a role of a guide, and in this configuration, as shown in FIG. 25A17(b), the cylindrical body located directly below the outlet 271 becomes the mist guide 203, and the cylindrical body located directly below the air outlet 253 becomes the air guide 204. There is no cylindrical body between the mist guide 203 and the air guide 204 (guide-free area 260).

[0086] The thickness of the honeycomb structure (length of the cylindrical body) is set so as to guide the mist and air that enter in a turbulent state, rectify the flow, and eject it directly below the mist guide 203. As a result, the mist screen S has a five-layer structure consisting of an air layer AS, an intermediate layer TS, a mist layer MS, an intermediate layer TS, and an air layer AS, as shown in Fig. 25A17(c). The intermediate layer TS is a spatial region between the mist layer MS and the air layer AS where air flow is not actively generated.

[0087] In the configuration shown in the figure, the thickness of the air layer AS is made larger than the thickness of the mist layer MS. Specifically, the air layer AS is formed to be at least twice (but not more than 10 times) thicker than the mist layer MS. If the mist layer MS is thick, it becomes difficult to visually recognize the image when the image is formed by rear projection, so a thinner mist layer MS is preferable. Note that the mist guide 203 is not limited to a honeycomb structure consisting of a cylindrical body with a hexagonal cross section.

[0088] Next, the operation of the mist screen forming device 200 will be described. Water is supplied from a spray liquid tank to a tank 201, and an ultrasonic vibrator is driven to generate mist within the tank. This mist is sprayed from the tip of a spray nozzle 203 into a housing 211. Air is powerfully introduced into the housing 211 by a centrifugal fan 204.

[0089] The mist in the housing 211 moves into the mist rectifier 220 from the opening at the bottom (mist inlet 228). The mist that moves into the mist rectifier 220 proceeds from one end of the passage 223, turns around neatly at the curved plate 225 at the other end, and flows back, hitting the wall at one end. Then, the mist that has flowed through the passage 223 moves into the storage chamber 222 from a plurality of holes 229 provided at the bottom of the passage 223. The plurality of holes 229 have a large area on the upstream side and become smaller downstream, so that the mist is uniformly supplied to the storage chamber 222. When the mist accumulates in the storage chamber 222, the mist is discharged at a constant flow rate from the outlet 271 due to the internal pressure. The discharged mist is guided by the mist guide 203 to make the flow uniform, and is sprayed downward in a screen shape.

[0090] On the other hand, in the air ejection device 205, a large number of axial flow fans 252 are driven to introduce a large amount of air into the housing 251. The introduced air is ejected from air ejection ports 253 opening at the bottom of the housing 251 and reaches the air guide 204. The ejected air is adjusted in flow by the air guide 204 and ejected downward from the lower end of the air guide 204. This air is ejected and formed on both sides of the mist screen, forming a state in which the mist screen is sandwiched via the intermediate layer TS. It is preferable that the flow velocity of the air is approximately the same as the flow velocity of the mist. The flow velocity is adjusted by controlling the drive of each of the axial flow fans 252 by the air control unit.

[0091] In this way, even if the air layer AS receives wind in the usage environment caused by an air conditioner or people moving, the surface layer of the air layer AS can absorb the wind and take it in, so it is less susceptible to the wind flow in the usage environment. Furthermore, since an intermediate layer TS is formed between the air layer AS and the mist layer MS, this part acts as a buffer and the mist layer MS is less susceptible to the effects of turbulence in the air layer AS.

[0092] An image is projected by a projector P onto the mist screen S thus formed. This projection light passes through the air layer AS of the mist screen S and is reflected by the surface of the mist layer MS on the side where the projector P is installed, forming a desired image or video.

[0093] (Embodiment 3) 25A18 is a partial configuration diagram showing a mist screen forming device according to embodiment 3 of the present invention. This mist screen forming device has substantially the same configuration as the mist screen forming device 100 according to embodiment 1 above, but is characterized in that the air layer AS is formed in two layers, one on each side of the mist layer MS.

[0094] The figure shows a plan view of a guide section for forming two layers of air layer AS. This guide section 360 has a configuration substantially the same as that of the guide section 6 shown in the first embodiment, and is arranged at the air outlet 53 of the air ejection device 5. It has an inner region 350 for forming the inner air layer AS on the mist layer MS side, and an outer region 351 for forming the outer air layer AS on the outside, and the cylindrical body is not provided in the intermediate region 352 corresponding to the intermediate layer TS formed as a result of ejection. That is, the intermediate region 352 is provided in a portion corresponding to the air guide 4 of the guide section 6 in the first embodiment, and no cylindrical body is provided in the intermediate region 352 (similar to a state of being covered), and air is ejected from the air ejection section 53 of the air ejection device 5. The other configurations are the same as those of the first embodiment, so illustrations and explanations are omitted. The sizes of the cylindrical bodies forming the inner region 350 and the outer region 351 may be different, and the lengths may be different. The portion forming the mist layer MS is the mist layer forming region 353.

[0095] FIG. 25A19 is a schematic diagram showing the structure of the mist screen S formed by the guide part shown in FIG. 25A18. The mist screen S is formed from the mist rectifier 2 using this guide part 360, and the inner air layer AS1 is formed on both sides of the mist screen S by the inner area 350 of the guide part. In this state, the inner air layer AS1 is formed on both sides of the mist layer MS in a manner similar to that of the first embodiment, forming a state in which the mist layer MS is sandwiched. The inner air layer AS1 has the same effect as the air layer AS of the first embodiment. That is, the inner air layer AS1 sandwiches the mist layer MS to prevent the mist of the mist layer MS from diffusing, and the thickness of the mist layer MS can be maintained to a desired height. As a result, the image projected on the mist layer MS can be stabilized in the vertical direction (the direction of the mist flow).

[0096] Furthermore, the outer region forms an outer air layer AS2. The outer air layer AS2 absorbs the wind flow from an external air conditioner or electric fan and pushes it upward. A buffer intermediate layer TS is formed between the outer air layer AS2 and the inner air layer AS1, so it is less susceptible to disturbances in the flow of the outer air layer AS2. The greater the thickness (width) of the intermediate layer TS, the more it can suppress the effects of wind in the external environment.

[0097] (Embodiment 4) 25A20 is a configuration diagram showing a mist screen forming device according to embodiment 4 of the present invention. The intermediate layer TS in the configuration of embodiment 3 may be eliminated (the inner air layer AS1 and the outer air layer AS2 may be adjacent to each other), and an air jetting device 5 and an air jetting port 53 for jetting air to the inner air layer AS1 and the outer air layer AS2 may be provided separately. As shown in the figure, in this mist screen forming device, air jetting devices 5a and 5b having substantially the same configuration as those in the above embodiment are provided on both sides of the mist generator and the mist rectifier 2, respectively.

[0098] The air outlet of air ejection device 5a and the air outlet of air ejection device 5b are arranged side by side on both sides of the discharge port 71. As described above, guide section 6 has a honeycomb structure in which a large number of cylinders with a hexagonal cross section are arranged. The cylinder located directly above the discharge port 71 serves as a mist guide 3, and the cylinder located directly above the air ejection port 53a serves as an air guide 4a for the inner air layer AS1. The cylinder located directly above the air ejection port 53b serves as an air guide 4b for the outer air layer AS2.

[0099] The mist generated by the mist generator is rectified by the mist rectifier 2 and discharged in a screen shape by the mist guide 3 from the discharge port 71. The air jetting device 5a and the air jetting device 5b jet air from the air jetting port 53a and the air jetting port 53b, respectively, to form an inner air layer AS1 and an outer air layer AS2. The inner air layer AS1 and the outer air layer AS2 sandwich the mist layer MS.

[0100] In addition, the axial fans of the air ejection devices 5a and 5b are controlled to make the flow speed of the outer air layer AS2 faster than that of the inner air layer AS1. By making the flow speed of the outer air layer AS2 faster than that of the inner air layer AS1, the air layer AS1 is prevented from diffusing at the top of the mist screen, and accordingly, the diffusion of the inner mist layer MS is prevented, and as a result, the image projected onto the mist layer MS can be made more stable in the vertical direction (the direction of the mist flow).

[0101] Furthermore, a humidifier (not shown) may be provided to supply high humidity air to the inside of the housing 51 in the air ejection device 5a, and the inner air layer AS1 may be formed by ejecting air with a high humidity level but not enough to form mist. In this way, the mist layer MS is sandwiched between the high humidity inner air layers AS1, and compared to when normal air is ejected into the inner air layer AS1, the humidity gradient between the mist layer MS and the inner air layer AS1 is reduced, preventing the mist layer MS from diffusing, and as a result, the image projected onto the mist layer MS can be made more stable in the vertical direction (the direction of the mist flow).

[0102] [Additional note 1] A mist screen forming device that discharges mist supplied from a mist generating means into a screen shape, A mist ejection means for ejecting mist in one direction in a screen-like shape to form a mist layer in a space; an air ejection means for ejecting mist-free air in substantially the same direction as the ejection direction of the mist and on both sides of the mist layer to form air layers sandwiching the mist layer; A mist screen forming device comprising: [Additional note 2] The mist screen forming device described in appended claim 1, characterized in that the mist ejection means has a band-shaped mist ejection outlet from which the mist is ejected, and the air ejection means has band-shaped air ejection outlets that eject air and are provided adjacent to both sides of the mist ejection outlet. [Additional note 3] The mist screen forming device according to claim 1 or 2 further comprises a mist guide comprising a honeycomb structure formed by arranging a number of cylindrical bodies in a regular pattern, the mist guide being connected to the mist outlet. [Additional note 4] The mist screen forming device according to any one of appended items 1 to 3 further comprises an air guide comprising a honeycomb structure formed by regularly arranging a number of cylindrical bodies, which is connected to the air outlet. [Additional note 5] Further, the device has a storage section for storing the mist and a passage through which the mist supplied from the mist generating means passes, and the passage has a plurality of holes communicating with the storage section for storing the mist, 5. The mist screen forming device according to any one of claims 1 to 4, wherein the mist ejection means ejects the mist stored in the storage portion in the form of a screen. [Additional note 6] Furthermore, the mist screen forming device described in appended claim 5 is characterized in that the holes downstream of the mist flow in the passage are smaller than the holes upstream of the passage. [Additional note 7] Furthermore, the mist ejection means has a band-shaped mist ejection port for ejecting the mist, The mist outlet is provided in the storage section, 7. The mist screen forming device according to claim 6, wherein the plurality of holes are arranged substantially along the longitudinal direction of the mist outlet. [Explanation of symbols]

[0103] 100 Mist screen connector 1 Rectifier piece 2 Beam section 3. Curved surface (outer surface) 4 Curved surface (inner surface) 50 Mist screen forming device

Claims

1. A mist screen forming device that discharges mist supplied from a mist generating means into a screen shape, A mist ejection means for ejecting mist in one direction in a screen-like shape to form a mist layer in a space; and an air ejection means for ejecting air not including mist in substantially the same direction as the ejection direction of the mist and on both sides of the mist layer to form air layers sandwiching the mist layer, Further, the device has a storage section for storing the mist and a passage through which the mist supplied from the mist generating means passes, and the passage has a plurality of holes communicating with the storage section for storing the mist, The mist screen forming device is characterized in that the mist ejection means ejects the mist stored in the storage section in the form of a screen.

2. 2. The mist screen forming device according to claim 1, further comprising: a plurality of holes, the holes being smaller downstream in the mist flow within the passage than the holes being upstream.

3. Furthermore, the mist ejection means has a band-shaped mist ejection port for ejecting the mist, The mist outlet is provided in the storage section, 3. The mist screen forming device according to claim 2, wherein the plurality of holes are arranged substantially along a longitudinal direction of the mist outlet.

Images