Image projection system and stereoscopic screen device

Abstract

To provide an image projection system and a stereoscopic screen device which can stereoscopically (three-dimensionally) project an image (image light) from a projection device (projector).SOLUTION: An image projection system X1 includes a stereoscopic screen device Y1 and a projection device Z. The stereoscopic screen device Y1 includes an injection nozzle A1 which has an injection angle of 2θ and which injects multiple liquid fine particles. The injection nozzle A1 injects the multiple liquid fine particles in the air so as to form a stereoscopic screen S1 in which the multiple liquid fine particles are aerially dispersed (floatingly dispersed). The projection device Z emits image light B toward the stereoscopic screen S1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an image projection system that projects an image (image light) stereoscopically (three-dimensionally), and a stereoscopic screen device. [Background technology]

[0002] Patent Document 1 discloses a fluid screen imaging device as a technology for projecting an image (image light) on a screen. The fluid screen imaging device includes a three-tube projection video projector, a curved reflector with an arc-shaped cross section that is arranged in front of the video projector and reflects the projected light from the video projector, and a fluid screen formed by fluid sprayed from a number of nozzles arranged in an arc shape that projects the light reflected by the curved reflector. The fluid screen imaging device according to Patent Document 1 is characterized in that any one or more of the position of the three-tube projection video projector, the position of the curved reflector, and the focal length of the three-tube projection video projector are adjusted so that the images of the light projected from each of the three lens ports of the three-tube projection video projector and reflected by the curved reflector are imaged at the same position on the fluid screen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 5-27694 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, mist is generated from a row of mist generators to form a flat fluid screen and project a flat image (image light) into the air, so it is not possible to project the image (image light) in a stereoscopic (three-dimensional) manner.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide an image projection system and a stereoscopic screen device that can project an image (image light) from a projector in a stereoscopic (three-dimensional) manner. [Means for solving the problem]

[0006] [1] The image projection system of the present invention is an image projection system comprising a three-dimensional screen device and a projector, wherein the three-dimensional screen device comprises an injection nozzle having an injection angle and which injects a large number of liquid particles, the injection nozzle injects the large number of liquid particles into the air to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air, and the projector emits image light onto the three-dimensional screen.

[0007] In addition, the three-dimensional screen device can also be configured to have a spray nozzle having a spray angle of 15° (150 degrees) or more and 150° (150 degrees) or less, which sprays (sprays into the air) a large number of liquid particles (fine water particles / fine water particles) to form a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air.

[0008] Furthermore, according to the present invention, a 3D screen can be formed in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air by spraying a large number of liquid particles (fine water particles / fine water particles) from a spray nozzle having a spray angle. When image light is emitted from a projector onto the 3D screen, the image light is projected onto the large number of liquid particles (fine water particles / fine water particles) that form the 3D screen, and the image (image light) can be projected stereoscopically (three-dimensionally) onto the 3D screen.

[0009] [2] The image projection system of the present invention is an image projection system comprising a three-dimensional screen device, a projector, and a storage tank for storing liquid, wherein the three-dimensional screen device comprises an injection nozzle having an injection angle and for injecting a large number of liquid particles, the injection nozzle being arranged at an interval from the liquid surface in a direction perpendicular to the liquid surface of the storage tank, and injecting the large number of liquid particles into the air between the injection nozzle and the liquid surface to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air, and the projector emits image light onto the three-dimensional screen.

[0010] The three-dimensional screen device may also be configured to include a jet nozzle having a jet angle of 15° (15 degrees) or more and 150° (150 degrees) or less, which jets a large number of liquid particles (water particles / water particles) onto the liquid surface (into the air between the jet nozzle and the liquid surface, and onto the liquid surface) to form a three-dimensional screen in which a large number of liquid particles (water particles / water particles) are dispersed in the air between the jet nozzle and the liquid surface. The storage tank may also be configured to store the liquid particles (water particles / water particles) jetted from the jet nozzle and the liquid particles (water particles / water particles) dispersed in the air between the jet nozzle and the liquid surface.

[0011] Furthermore, according to the present invention, a large number of liquid particles (fine water particles / fine water particles) are sprayed from a spray nozzle having a spray angle into the air between the spray nozzle and the liquid surface, and also sprayed onto the liquid surface of a storage tank, thereby forming a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air between the spray nozzle and the liquid surface. When image light is emitted from a projector onto a three-dimensional screen, the image light is projected onto the large number of liquid particles (fine water particles / fine water particles) that form the three-dimensional screen, and an image (image light) can be projected three-dimensionally onto the three-dimensional screen. The liquid particles (fine water particles / fine water particles) sprayed from the spray nozzle into the air between the spray nozzle and the liquid surface, and onto the liquid surface of the storage tank, can be stored in the storage tank.

[0012] [3] The image projection system according to the present invention is an image projection system including a three-dimensional screen device, a projector, and a reservoir tank for storing liquid, the three-dimensional screen device including a first injection nozzle having an injection angle and for injecting a large number of liquid particles, and a second injection nozzle having an injection angle and for injecting a large number of liquid particles, the injection nozzles being arranged at intervals between each other in a first direction parallel to the liquid surface of the reservoir tank, and being arranged at intervals from the liquid surface in a second direction perpendicular to the first direction, the first injection nozzles being arranged at intervals from the liquid surface in a second direction perpendicular to the first direction, the injection nozzle injects the numerous liquid particles into the air between the first injection nozzle and the liquid surface, forming a first three-dimensional screen in which the numerous liquid particles are dispersed in the air, the second injection nozzle injects the numerous liquid particles into the air between the second injection nozzle and the liquid surface, forming a second three-dimensional screen in which the numerous liquid particles are dispersed and which is superimposed on a part of the first three-dimensional screen in the air, and the projector emits image light onto the first three-dimensional screen and the second three-dimensional screen.

[0013] The first injection nozzle can have a spray angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and spray a large number of liquid particles (fine water particles / fine water particles) onto the liquid surface (into the air between the first injection nozzle and the liquid surface, and onto the liquid surface), thereby forming a first three-dimensional screen in which the liquid particles (fine water particles / fine water particles) are dispersed in the air between the first injection nozzle and the liquid surface. The second injection nozzle has an injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid particles (water particles / water particles) onto the liquid surface (into the air between the second injection nozzle and the liquid surface, and onto the liquid surface), so that a second three-dimensional screen in which a large number of liquid particles (water particles / water particles) are dispersed is formed in the air between the second injection nozzle and the liquid surface, overlapping a part of the first three-dimensional screen. The second jet nozzle may have the same jet angle as the first jet nozzle. Furthermore, the first and second stereoscopic screens may be configured to be formed continuously and without interruption in the first direction. Furthermore, the storage tank can also be configured to store liquid microparticles (fine water particles / fine water particles) sprayed onto the liquid surface from the first and second spray nozzles, liquid microparticles (fine water particles / fine water particles) dispersed in the air between the first spray nozzle and the liquid surface, and liquid microparticles (fine water particles / fine water particles) dispersed in the air between the second spray nozzle and the liquid surface.

[0014] According to the present invention, a first three-dimensional screen in which a large number of liquid particles (water fine particles / water fine particles) are dispersed in the air between the first injection nozzle and the liquid surface is formed by injecting a large number of liquid particles (water fine particles / water fine particles) from a first injection nozzle into the air between the first injection nozzle and the liquid surface and injecting the liquid surface of the storage tank, and a second three-dimensional screen in which a large number of liquid particles (water fine particles / water fine particles) are dispersed is formed by injecting a large number of liquid particles (water fine particles / water fine particles) from a second injection nozzle into the air between the second injection nozzle and the liquid surface, which is superimposed on a part of the first three-dimensional screen, thereby forming the first and second three-dimensional screens continuously and without interruption. When image light is emitted from a projector across the first and second three-dimensional screens, the image light is projected onto the large number of liquid particles (water fine particles / water fine particles) that form the first and second three-dimensional screens, and the image (image light) can be projected three-dimensionally across the first and second three-dimensional screens without interruption. The liquid particles (fine water particles / fine water particles) sprayed from the first and second spray nozzles into the air between the first and second spray nozzles and the liquid surface, and onto the liquid surface of the storage tank, can be stored in the storage tank.

[0015] [4] The image projection system according to the present invention is an image projection system including a three-dimensional screen device, a projector, and a reservoir tank for storing liquid, the three-dimensional screen device including a plurality of jet nozzles each having a jet angle and jetting a large number of liquid particles, the jet nozzles being arranged at intervals between each other in a first direction parallel to the liquid surface of the reservoir tank, and being arranged at intervals from the liquid surface in a second direction perpendicular to the first direction, and one of the adjacent jet nozzles among the jet nozzles being adjacent to the one of the jet nozzles. The method is characterized in that the numerous liquid particles are sprayed into the air between a nozzle and the liquid surface, forming a three-dimensional screen in which the numerous liquid particles are dispersed in the air, and of each of the spray nozzles, the other spray nozzle sprays the numerous liquid particles into the air between the other spray nozzle and the liquid surface, forming a three-dimensional screen in which the numerous liquid particles are dispersed in the air that is superimposed on a part of the three-dimensional screen formed by one of the spray nozzles, and the projector emits image light onto the three-dimensional screens formed by each spray nozzle.

[0016] In addition, a configuration can also be adopted in which, of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), one injection nozzle has a injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid microparticles (fine water particles / fine water particles) onto the liquid surface (into the air between one injection nozzle and the liquid surface, and onto the liquid surface), thereby forming a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between one injection nozzle and the liquid surface. Furthermore, of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), the other injection nozzle has a injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid particles (fine water particles / fine water particles) onto the liquid surface (into the air between the other injection nozzle and the liquid surface, and onto the liquid surface), so that a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed is formed in the air between the other injection nozzle and the liquid surface, overlapping with a part of the three-dimensional screen formed by one injection nozzle, thereby forming a three-dimensional screen. Furthermore, a configuration in which each of the jet nozzles has the same jet angle can also be adopted. In addition, a configuration may be adopted in which the three-dimensional screen formed by each of the jet nozzles is formed continuously and uninterrupted in the first direction. Furthermore, the storage tank can also be configured to store liquid microparticles (fine water particles / fine water particles) sprayed from each spray nozzle onto the liquid surface, and liquid microparticles (fine water particles / fine water particles) dispersed between each spray nozzle and the liquid surface.

[0017] Furthermore, according to the present invention, by injecting a large number of liquid microparticles (fine water particles / fine water particles) from one of the adjacent jet nozzles into the air between the one jet nozzle and the liquid level and injecting it onto the liquid level of the storage tank, a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between the one jet nozzle and the liquid level is formed, and by injecting a large number of liquid microparticles (fine water particles / fine water particles) from the other of the adjacent jet nozzles into the air between the other jet nozzle and the liquid level and injecting it onto the liquid level of the storage tank, a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between the other jet nozzle and the liquid level is formed, which is superimposed on a part of the three-dimensional screen formed by one of the jet nozzles, and the three-dimensional screens formed by each jet nozzle can be formed continuously and without interruption in the first direction. When image light is emitted from a projector across the 3D screens formed by each jet nozzle, the image light is projected onto the numerous liquid particles (fine water particles / fine water particles) that form each 3D screen, allowing the image (image light) to be projected three-dimensionally without interruption across each 3D screen. The liquid particles (fine water particles / fine water particles) sprayed from each jet nozzle into the air between each jet nozzle and the liquid surface, and onto the liquid surface of the storage tank, can be stored in the storage tank.

[0018] [5] The three-dimensional screen device of the present invention is provided with a first injection nozzle having a jet angle and jetting a large number of liquid particles, and a second injection nozzle having a jet angle and jetting a large number of liquid particles, wherein the injection nozzles are arranged in a first direction with a gap between them, the first injection nozzle injects the large number of liquid particles into the air to form a first three-dimensional screen in which the large number of liquid particles are dispersed in the air, and the second injection nozzle injects the large number of liquid particles into the air to form a second three-dimensional screen in the air that is superimposed on a part of the first three-dimensional screen and in which the large number of liquid particles are dispersed.

[0019] In addition, the first injection nozzle can have an injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and can be configured to inject a large number of liquid particles (fine water particles / fine water particles) into the air, forming a first three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air. Furthermore, the second injection nozzle can have an injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and can inject a large number of liquid particles (fine water particles / fine water particles) into the air, superimposing it on a part of the first three-dimensional screen to form a second three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air. Furthermore, the second jet nozzle may have the same jet angle as the first jet nozzle. The first and second stereoscopic screens may be formed continuously and without interruption in the first direction.

[0020] Furthermore, according to the present invention, a first three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air is formed by spraying a large number of liquid particles (fine water particles / fine water particles) from a first spray nozzle into the air, and a second three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air is formed by spraying a large number of liquid particles (fine water particles / fine water particles) from a second spray nozzle into the air so as to overlap a part of the first three-dimensional screen, so that the first and second three-dimensional screens can be continuously formed without interruption in the first direction. When image light is emitted from a projector across the first and second three-dimensional screens, the image light is projected onto the large number of liquid particles (fine water particles / fine water particles) that form the first and second three-dimensional screens, and images (image light) can be projected three-dimensionally across the first and second three-dimensional screens without interruption.

[0021] [6] The three-dimensional screen device of the present invention is a three-dimensional screen device having a plurality of injection nozzles having an injection angle and injecting a large number of liquid particles, the injection nozzles being arranged in a first direction with a gap between each of the injection nozzles, one of the adjacent injection nozzles injects the large number of liquid particles into the air between the one injection nozzle and the liquid surface to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air, and the other of the adjacent injection nozzles injects the large number of liquid particles into the air between the other injection nozzle and the liquid surface to form a three-dimensional screen that is superimposed on a portion of the three-dimensional screen formed by the one injection nozzle in the air and in which the large number of liquid particles are dispersed.

[0022] In addition, a configuration can also be adopted in which one of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles) has a injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid particles (fine water particles / fine water particles) into the air, thereby forming a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air. Furthermore, of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), the other injection nozzle can have an injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and can inject a large number of liquid particles (water particles / water particles) into the air, which is overlapped with a part of the three-dimensional screen formed by one of the injection nozzles, forming a three-dimensional screen in which a large number of liquid particles (water particles / water particles) are dispersed in the air. Furthermore, a configuration in which each of the jet nozzles has the same jet angle can also be adopted. In addition, the three-dimensional screen formed by the jet nozzles may be configured to be formed continuously and uninterrupted in the first direction.

[0023] Furthermore, according to the present invention, a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air is formed by injecting a large number of liquid particles (fine water particles / fine water particles) from one of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), and a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed in the air is formed by injecting a large number of liquid particles (fine water particles / fine water particles) from the other injection nozzle into the air so that the liquid particles are superimposed on a part of the three-dimensional screen formed by one injection nozzle, and the three-dimensional screens formed by each injection nozzle can be continuously formed without interruption in the first direction. When image light is emitted from a projector across the three-dimensional screens formed by each injection nozzle, the image light is projected onto the large number of liquid particles (fine water particles / fine water particles) forming each three-dimensional screen, and an image (image light) can be projected three-dimensionally without interruption across each three-dimensional screen.

[0024] [7] The three-dimensional screen device of the present invention is a three-dimensional screen device comprising a plurality of jet nozzles having a jet angle and jetting a large number of liquid particles, and a storage tank for storing liquid, wherein the jet nozzles are arranged at intervals between each other in a first direction parallel to the liquid level of the storage tank, and are arranged at intervals from the liquid level in a second direction perpendicular to the first direction, wherein one of adjacent jet nozzles among the jet nozzles jets the large number of liquid particles into the air between the one jet nozzle and the liquid level to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air, and the other of adjacent jet nozzles among the jet nozzles jets the large number of liquid particles into the air between the other jet nozzle and the liquid level, and a three-dimensional screen is formed in the air that is overlapped with a part of the three-dimensional screen formed by the one jet nozzle, and in which the large number of liquid particles are dispersed.

[0025] In addition, a configuration can also be adopted in which, of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), one injection nozzle has a injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid microparticles (fine water particles / fine water particles) onto the liquid surface (into the air between one injection nozzle and the liquid surface, and onto the liquid surface), thereby forming a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between one injection nozzle and the liquid surface. Furthermore, of the adjacent injection nozzles (two injection nozzles / a pair of injection nozzles), the other injection nozzle has a injection angle of 15° (15 degrees) or more and 150° (150 degrees) or less, and injects a large number of liquid particles (fine water particles / fine water particles) onto the liquid surface (into the air between the other injection nozzle and the liquid surface, and onto the liquid surface), so that a three-dimensional screen in which a large number of liquid particles (fine water particles / fine water particles) are dispersed is formed in the air between the other injection nozzle and the liquid surface, overlapping with a part of the three-dimensional screen formed by one injection nozzle, thereby forming a three-dimensional screen. Furthermore, a configuration in which each of the jet nozzles has the same jet angle can also be adopted. In addition, a configuration may be adopted in which the three-dimensional screen formed by each of the jet nozzles is formed continuously and uninterrupted in the first direction. Furthermore, the storage tank can also be configured to store liquid microparticles (fine water particles / fine water particles) sprayed from each spray nozzle onto the liquid surface, and liquid microparticles (fine water particles / fine water particles) dispersed between each spray nozzle and the liquid surface.

[0026] Furthermore, according to the present invention, by injecting a large number of liquid microparticles (fine water particles / fine water particles) from one of the adjacent jet nozzles into the air between the one jet nozzle and the liquid level and injecting it onto the liquid level of the storage tank, a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between the one jet nozzle and the liquid level is formed, and by injecting a large number of liquid microparticles (fine water particles / fine water particles) from the other of the adjacent jet nozzles into the air between the other jet nozzle and the liquid level and injecting it onto the liquid level of the storage tank, a three-dimensional screen in which a large number of liquid microparticles (fine water particles / fine water particles) are dispersed in the air between the other jet nozzle and the liquid level is formed, which is superimposed on a part of the three-dimensional screen formed by one of the jet nozzles, and the three-dimensional screens formed by each jet nozzle can be formed continuously and without interruption in the first direction. When image light is emitted from a projector across the 3D screens formed by each jet nozzle, the image light is projected onto the numerous liquid particles (fine water particles / fine water particles) that form each 3D screen, allowing the image (image light) to be projected three-dimensionally without interruption across each 3D screen. The liquid particles (fine water particles / fine water particles) sprayed from each jet nozzle into the air between each jet nozzle and the liquid surface, and onto the liquid surface of the storage tank, can be stored in the storage tank. Effect of the Invention

[0027] According to the present invention, a three-dimensional screen is formed in which a large number of liquid particles are dispersed (floatingly dispersed) in the air, and an image (image light) is projected from a projector onto the three-dimensional screen (the large number of liquid particles dispersed in the air), making it possible to project the image in a three-dimensional manner, and thus to project a realistic image onto the three-dimensional screen. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a front view showing an image projection system according to a first embodiment. [Diagram 2] FIG. 1 is a plan view (top view) showing an image projection system according to a first embodiment. [Diagram 3] FIG. 13 is a diagram showing the jet nozzles forming a stereoscopic screen. [Figure 4] FIG. 4 is an enlarged view of a portion of FIG. [Diagram 5] FIG. [Figure 6] FIG. 2A is a bottom view showing the injection nozzle, and FIG. 2B is a plan view showing the injection nozzle. [Figure 7] 7 is a cross-sectional view taken along line AA in FIG. 6. [Figure 8] FIG. 8 is an enlarged view of a portion of FIG. [Figure 9] FIG. 2 is a diagram showing a nozzle unit (nozzle main body and nozzle protrusion), where (a) is a bottom view (underside view) and (b) is a side view. [Figure 10] FIG. 10 is a cross-sectional view taken along line BB of FIGS. 9(a) and 9(b). [Figure 11] FIG. 10(b) is a partially enlarged view of FIG. 10(b) and is a cross-sectional view showing the nozzle main body, the nozzle protrusion, the nozzle throttle hole, the mist throttle hole, and the guide body. [Figure 12] FIG. 2 is a diagram showing a guide body, where (a) is a top view and (b) is a side view. [Figure 13] 1A and 1B are diagrams showing a guide body, in which (a) is a bottom view and (b) is a CC cross-sectional view. [Figure 14] FIG. 11 is a front view showing an image projection system according to a second embodiment. [Figure 15] FIG. 11 is a plan view (top view) showing an image projection system according to a second embodiment. [Figure 16] FIG. 11 is a front view showing an image projection system according to a third embodiment. [Figure 17] FIG. 11 is a plan view (top view) showing an image projection system according to a third embodiment. [Figure 18] FIG. 13 is a front view showing an image projection system according to a fourth embodiment. [Figure 19] FIG. 13 is a side view showing an image projection system according to a fourth embodiment. [Figure 20] FIG. 13 is a side view showing an image projection system according to a fourth embodiment having five ejection nozzles. [Figure 21] FIG. 1 is a diagram showing the three-dimensional screen device of the first embodiment, in which jet nozzles form a three-dimensional screen. [Figure 22] FIG. 1 is a front view showing a three-dimensional screen device according to a first embodiment. [Figure 23] This is a cross-sectional view taken along the line XX in Figure 23. [Figure 24] FIG. 11 is a front view showing the three-dimensional screen device according to the second embodiment. [Diagram 25] FIG. 11 is a front view showing the three-dimensional screen device according to the third embodiment. [Figure 26] FIG. 11 is a side view showing the three-dimensional screen device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] An image projection system and a three-dimensional screen apparatus according to the present invention will be described with reference to FIGS.

[0030] Image projection systems according to first to fourth embodiments will be described with reference to FIGS. 1 to 20. FIG.

[0031] The image projection system of the first embodiment will be described with reference to FIGS.

[0032] 1 to 13, a first embodiment of an image projection system (hereinafter referred to as "image projection system X1") forms a three-dimensional screen S1 in the air, projects an image (hereinafter referred to as "image light B") onto the three-dimensional screen S1 formed in the air, and displays the image light B three-dimensionally on the three-dimensional screen S1.

[0033] The image projection system X1 includes a stereoscopic screen device Y1 and a projector Z, as shown in FIGS.

[0034] The three-dimensional screen device Y1 has a jet nozzle A1 as shown in Figures 1 and 2. As shown in Figures 3 and 4, the jet nozzle A1 has a jet angle 2θ, and forms a three-dimensional screen S1 in which a large number of liquid particles (fine water particles / fine water particles) (hereinafter simply referred to as "liquid particles") are dispersed (floating and dispersed) (hereinafter simply referred to as "dispersion") in the air. The jet angle 2θ is, for example, 15° (15 degrees) or more and 150° (150 degrees) or less (15°≦2θ≦150°).

[0035] As shown in Figures 5 to 13, the injection nozzle A1 has a nozzle shaft 2, a nozzle main body 3, a nozzle convex portion 4 (nozzle protrusion portion) (hereinafter simply referred to as the "nozzle convex portion 4"), a nozzle throttling hole 5, a mist throttling hole 6, and a guide body 7.

[0036] The nozzle shaft 2 is formed, for example, into a cylindrical shaft body (cylindrical shaft) as shown in Figures 5 to 8. The nozzle shaft 2 has a flow hole 15 and male thread portions 16 and 17 as shown in Figures 5 to 8.

[0037] 6 and 8, the communication hole 15 is formed in the nozzle shaft 2. The communication hole 15 penetrates the nozzle shaft 2 in the direction of the axial center line m of the nozzle shaft 2 and opens at one axial end 2A and the other axial end 2B of the nozzle shaft 2.

[0038] 6 and 8, the male thread portion 16 is formed on the nozzle shaft 2. The male thread portion 16 is disposed on one shaft end 2A side of the nozzle shaft 2. The male thread portion 16 is formed on the outer circumferential surface of the nozzle shaft 2.

[0039] 6 and 8, the male thread portion 17 is formed on the nozzle shaft 2. The male thread portion 17 is disposed on the other shaft end 2B side of the nozzle shaft 2. The male thread portion 17 is formed on the outer circumferential surface of the nozzle shaft 2.

[0040] As shown in Figs. 5 to 11, the nozzle body 3 is formed in a cylindrical shape with one cylindrical end 3A closed. The nozzle body 3 has a nozzle hole 21 and a female screw portion 22, as shown in FIGS.

[0041] 8, the nozzle hole 21 is formed in the nozzle body 3, arranged concentrically with a cylinder center line n of the nozzle body 3. The nozzle hole 21 extends between one cylinder end 3A and the other cylinder end 3B of the nozzle body 3 in the direction of the cylinder center line n, and opens at the other cylinder end 3B of the nozzle body 3. As shown in Figures 10 and 11, the nozzle hole 21 has a hole diameter dG, extends between one cylindrical end 3A and the other cylindrical end 3B of the nozzle body 3, and opens to the other cylindrical end 3B of the nozzle body 3.

[0042] 8 and 10, the female thread portion 22 is formed in the nozzle body 3. The female thread portion 22 is disposed on the other cylindrical end 3B side of the nozzle body 3. The female thread portion 22 is formed on the inner circumferential surface of the nozzle hole 21.

[0043] As shown in Figures 5 to 11, the nozzle protrusion 4 is integrally formed with one cylindrical end 3A of the nozzle body 3. As shown in Figures 10 and 11, the nozzle protrusion 4 closes one cylindrical end 3A of the nozzle body 3 with one convex end face 4A of the nozzle protrusion 4. As shown in Figures 8, 10 and 11, the nozzle protrusion 4 has a circular protrusion 25.

[0044] The circular protrusion 25 is formed in an annular shape, as shown in Figures 8, 10, and 11. The circular protrusion 25 is disposed concentrically with the nozzle main body 3, and is formed integrally with the nozzle protrusion 4. The circular protrusion 25 is disposed in the nozzle hole 21 of the nozzle body 3 across an insertion space 26. The insertion space 26 is formed in an annular shape. The circular protrusion 25 protrudes into the nozzle hole 21 in the direction of the cylinder center line n of the nozzle body 3. The circular protrusion 25 has a protruding end surface 25A that protrudes into the nozzle hole 21.

[0045] 6 to 11, the nozzle throttle hole 5 is formed in the nozzle protrusion 4. The nozzle throttle hole 5 is arranged concentrically with the nozzle hole 21. The nozzle throttle hole 5 is arranged concentrically with the circular protrusion 25. As shown in FIG. 8, the nozzle throttling hole 5 extends between one convex end face 4A and the other convex end face 4B of the nozzle convex portion 4 in the direction of the cylindrical center line n of the nozzle body 3, and opens to the other convex end face 4B of the nozzle convex portion 4.

[0046] The mist restriction hole 6 is formed in the nozzle protrusion 4, as shown in Figures 7, 8, 10 and 11. The mist restriction hole 6 is disposed between the protruding end surface 25A of the circular protrusion 25 and the nozzle restriction hole 5. The mist restriction hole 6 is disposed concentrically with the circular protrusion 25. The mist restriction hole 6 is disposed concentrically with the nozzle restriction hole 5.

[0047] As shown in FIG. 8, the mist throttle hole 6 opens into the protruding end surface 25A of the circular projection 25 in the direction of the cylinder center line n of the nozzle body 3, and communicates with the nozzle hole . The mist throttle hole 6 extends in the direction of the cylinder center line n of the nozzle main body 3 while decreasing in diameter from the protruding end surface 25A of the circular projection 25, as shown in FIG. 8, the mist restriction hole 6 is formed as a conical hole (frusto-conical hole) whose diameter gradually decreases from the protruding end face 25A of the circular projection 25 to the other convex end face 4B in the direction of the cylinder center line n of the nozzle body 3. The mist restriction hole 6 is connected to the nozzle restriction hole 5. 11, the mist restriction hole 6 has a hole length ML in the direction of the cylindrical center line n of the nozzle body 3. The mist restriction hole 6 has a hole diameter dM at the protruding end surface 25A of the circular projection 25. The mist restriction hole 6 has a hole diameter dF at a position where it communicates (opens) with the nozzle restriction hole 5. The hole diameter dM of the mist restriction hole 6 is larger than the hole diameter dF (dM>dF).

[0048] As shown in Figs. 8, 10 to 13, the guide body 7 has a guide disk 33 and a mist guide 35 (mist core) (hereinafter simply referred to as "mist guide 35").

[0049] 11 and 13, the guide disc 33 is formed with an outer circumferential diameter DB that is larger than the hole diameter dM of the mist throttle hole 6 and smaller than the hole diameter dG of the nozzle hole 21. The guide disc 33 has a plurality (a pair of) circular recesses 36, 37 and a plurality (four) of gas-liquid flow holes 39 as shown in Figs. 8, 10 to 13.

[0050] 8 and 10 to 13, each of the circular recesses 36, 37 is formed in the guide disc 33. Each of the circular recesses 36, 37 is disposed concentrically with the plate center line g of the guide disc 33.

[0051] As shown in FIGS. 8, 10 to 13, the circular recess 36 is recessed from the front plate surface 33A of the guide disk 33 in the direction of the plate center line g of the guide disk 33 and opens on the front plate surface 33A of the guide disk 33.

[0052] As shown in FIGS. 8, 10 to 13, the circular recess 37 is recessed from the back plate surface 33B of the guide disk 33 in the direction of the plate center line g of the guide disk 33 and opens at the back plate surface 33B of the guide disk 33.

[0053] The gas / liquid flow holes 39 are formed in the guide disk 33 as shown in Figures 8 and 10 to 13. The gas / liquid flow holes 39 are arranged in the respective circular recesses 36, 37. The gas / liquid flow holes 39 are arranged at equal intervals (equal angles) in the circumferential direction (circumferential direction) of the guide disk 33. The gas / liquid flow holes 39 penetrate the guide disk 33 in the direction of the plate center line g of the guide disk 33 and open to the recess bottom surfaces 36A, 37A of the respective circular recesses 36, 37.

[0054] As shown in Figs. 8, 10 to 13, the mist guide 35 is formed in a conical spiral shape (a conical spiral shape, or a truncated conical spiral shape). The mist guide 35 has a conical upper surface 35A, a conical bottom surface 35B (a conical bottom plane), and a conical side surface 35C. The mist guide 35 has a plurality of spiral surfaces, for example, a first spiral surface 41 and a second spiral surface 42.

[0055] The first spiral surface 41 and the second spiral surface 42 are formed in the same spiral shape as shown in Figures 11 to 13. The first and second spiral surfaces 41, 42 intersect the cone side surface 35C of the mist guide 35 and are disposed between the cone bottom surface 35B and the cone top surface 35A. 11 to 13, the first spiral surface 41 and the second spiral surface 42 are arranged in point symmetry with respect to the cone center line L of the mist guide 35. The second spiral surface 42 is arranged rotated 180 degrees from the position of the first spiral surface 41 with the cone center line L as the center. As shown in Figures 11 to 13, the first spiral surface 41 and the second spiral surface 42 are formed in a spiral shape with a diameter decreasing from the cone bottom surface 35B toward the cone top surface 35A, and extend up to the cone top surface 35A. The first spiral surface 41 and the second spiral surface 42 are disposed opposite each other on the conical upper surface 35A.

[0056] 13, the mist guide 35 has a guide height GL (core height) in the direction of the cone center line L. The guide height GL is set lower (shorter) than the hole length ML of the mist restriction hole 6. The mist guide 35 has a maximum bottom width GH of the conical bottom surface 35B as shown in Fig. 12. The maximum bottom width GH is narrower than the hole diameter dM of the mist restriction hole 6 and the outer circumferential diameter DB of the guide disc 33 as shown in Figs.

[0057] In the guide body 7, the mist guide 35 is disposed concentrically with the guide disk 33 with the cone center line L coinciding with the plate center line g of the guide disk 33, as shown in Figs. 13, the mist guide 35 is inserted into the circular recess 36 from the conical bottom surface 35B. The mist guide 35 is placed (placed) on the guide disc 33 with the conical bottom surface 35B abutting against the recess bottom surface 36A of the circular recess 36. The mist guide 35 and the guide disc 33 are formed integrally. 11 to 13, the mist guide 35 is disposed so that the conical upper surface 35A protrudes from the circular recess 36 (front plate surface 33A of the guide disk 33) in the direction of the plate center line g (cone center line L) of the guide disk 33. The mist guide 35 is disposed in the circular recess 36 (on the recess bottom surface 36A) of the guide disk 33 without blocking each of the gas-liquid flow holes 39. The gas-liquid flow holes 39 are arranged around the outside of the mist guide 35 and pass through the guide disc 33, as shown in Figures 8, 10 to 13.

[0058] In the injection nozzle A1, the guide body 7 is incorporated into the nozzle main body 3 and the nozzle protrusion 4, as shown in FIGS.

[0059] The guide body 7 is inserted into the nozzle hole 21 of the nozzle main body 3 from the conical upper surface 35A of the mist guide 35 (the front plate surface 33A of the guide disc 33) as shown in FIG. 8, the guide body 7 is disposed concentrically with the mist throttling hole 6, with the cone center line L coinciding with the cylinder center line n of the nozzle body 3. The guide body 7 is disposed in the insertion space 26 by inserting the guide disk 33 into the nozzle hole 21 of the nozzle body 3. The guide body 7 is disposed in the nozzle hole 21 with the circular protrusion 25 inserted into the circular recess 36 of the guide disk 33 and the protruding end face 25A of the circular protrusion 25 abutting against the recess bottom surface 36A of the circular recess 36 of the guide disk 33. The circular protrusion 25 is inserted into the circular recess 36 with a gap δa separated from the mist guide 35 (cone side surface 35C). The guide body 7 is disposed with the mist guide 35 inserted into the mist throttling hole 6, as shown in FIGS. As shown in FIG. 11, each gas-liquid flow hole 39 communicates with the mist throttle hole 6 and the nozzle hole 21 through a gap δa between the mist guide 35 (conical side surface 35C) and the circular projection 25.

[0060] 11, the mist guide 35 is inserted into the mist restriction hole 6 from the cone top surface 35A. The mist guide 35 is disposed in the mist restriction hole 6 with the cone center line L coinciding with the hole center line f of the mist restriction hole 6 (the cylinder center line n of the nozzle body 3). The mist guide 35 is inserted into the mist restriction hole 6 from the cone top surface 35A, with a gap between the cone side surface 35C and the cone inner circumferential surface 6A of the mist restriction hole 6. The mist guide 35 is inserted into the mist restriction hole 6 from within the nozzle hole 21. As shown in Figure 11, when the mist guide 35 is inserted into the mist restriction hole 6, it forms a first spiral mist flow path α and a second spiral mist flow path β between the first spiral surface 41, the second spiral surface 42, the conical inner surface 6A of the mist restriction hole 6, and the conical side surface 35C of the mist guide 35, and is installed in the mist restriction hole 6. As shown in FIG. 11, the mist guide 35 and the mist throttle hole 6 form a first mist flow path α and a second mist flow path β along a first spiral surface 41 and a second spiral surface 42.

[0061] The first mist flow path α is formed in a spiral shape between the first spiral surface 41 of the mist guide 35, the conical inner circumferential surface 6A of the mist throttle hole 6, and the conical side surface 35C of the mist guide 35, as shown in FIG. The second mist flow path β is formed in a spiral shape between the second spiral surface 42 of the mist guide 35, the conical inner circumferential surface 6A of the mist throttle hole 6, and the conical side surface 35C of the mist guide 35, as shown in FIG.

[0062] As shown in Figures 10 and 11, the first mist flow path α and the second mist flow path β extend in a spiral shape from the conical bottom surface 35B (the recess bottom surface 36A of the circular recess 36) of the mist guide 35 to the conical top surface 35A in the direction of the cylindrical center line n of the nozzle body 3, and open into the mist throttling hole 6 and each gas-liquid flow hole 39. 10 and 11, the first mist flow path α and the second mist flow path β are connected to the nozzle hole 21 through each gas-liquid flow hole 39. The first mist flow path α and the second mist flow path β are connected to the nozzle throttle hole 5.

[0063] The nozzle main body 3 in which the guide body 7 is assembled into the mist restriction hole 6 and the nozzle hole 21 (hereinafter referred to as "nozzle unit NU") is disposed (coupled) to the nozzle shaft 2, as shown in FIGS. The nozzle unit NU is attached to the nozzle shaft 2 by fitting the nozzle body 3 onto the nozzle shaft 2 at one shaft end 2A side of the nozzle shaft 2. The nozzle unit NU is fixed airtightly to the nozzle shaft 2 by screwing the male thread portion 16 of the nozzle shaft 2 into the female thread portion 22 of the nozzle body 3.

[0064] In the nozzle unit NU, as shown in Figure 8, the guide body 7 is positioned with the back plate surface 33B of the guide disk 33 abutting against one axial end 2A of the nozzle shaft 2, and is positioned in the nozzle hole 21 with the guide disk 33 held by the protruding end surface 25A of the circular protrusion 25 and one axial end 2A of the nozzle shaft 2. In the nozzle unit NU, the nozzle throttling hole 5 is connected to the flow hole 15 (nozzle axis 2) through the mist throttling hole 6 (first mist flow path α and second mist flow path β), the circular recess 36 of the guide disk 33, each gas-liquid flow hole 39 and the circular recess 37, as shown in Figure 8. 8, in the nozzle unit NU, the mist throttle hole 6 is communicated with the communication hole 15 (nozzle shaft 2) through the circular recess 36 of the guide disk 33, each gas-liquid flow hole 39 and the circular recess 37. The mist throttle hole 6 is formed into a conical hole (or a truncated conical hole) with its diameter decreasing from the communication hole 15 side. In the nozzle unit NU, the first mist flow path α and the second mist flow path β are connected (open) to the nozzle throttling hole 5, as shown in Figure 8, and are connected to the flow hole 15 (nozzle axis 2) through the circular recess 36 of the guide disk 33, each gas-liquid flow hole 39, and the circular recess 37.

[0065] The projector Z emits image light B based on input image data. The projector Z is a projector. For example, the projector Z is a DLP (Digital Light Processing) type projector, a liquid crystal projector, or a spotlight type projector.

[0066] 1 and 2, an image projection system X1 has an ejection nozzle A1 (three-dimensional screen device Y1) and a projector Z disposed in the air.

[0067] As shown in FIG. 1, the jet nozzle A1 is disposed in the air (above the ground) at a jet interval H1 from a projection surface W such as the ground or the wall surface of a building. The jet nozzle A1 is disposed with a jetting distance H1 between the jet nozzle A1 and the projection plane W in a direction perpendicular to the projection plane W. The ejection nozzle A1 is disposed such that an ejection direction V (hereinafter simply referred to as "ejection direction V") for ejecting a large number of liquid particles faces the projection surface W. The ejection nozzle A1 is disposed at an inclination with respect to the projection surface W, having an inclination angle θx. The inclination angle θx is, for example, 45° (θx=45°).

[0068] 1, the injection nozzle A1 is connected to a liquid supply source 81, and is supplied with liquid Q from the liquid supply source 81. The supply pipe 82 is connected to the other shaft end 2B of the nozzle shaft 2 (injection nozzle A1) and the liquid supply source 81.

[0069] 1, the projector Z is disposed in the air at a projection distance H2 from the projection surface W in a direction perpendicular to the projection surface W. The projector Z is disposed at a projection distance H2 from the projection surface W in a direction perpendicular to the projection surface W, for example, with the ejection nozzle A1 positioned between the projection surface W and the projector Z. 1, the projector Z is disposed at a distance T from the ejection nozzle A1 in a direction parallel to the projection surface W. The projector Z is disposed such that the direction K in which the image light B is emitted (hereinafter referred to as the "emission direction K") faces the projection surface W. The projector Z is disposed such that the emission direction K is perpendicular to the projection surface W. The projector Z emits image light B toward the projection surface W, as well as into the air between the ejection nozzle A1 and the projection surface W.

[0070] 3, the image projection system X1 supplies liquid Q from a liquid supply source 81 to the jet nozzle A1. The liquid Q is, for example, water. The liquid Q from the liquid supply source 81 passes through a supply pipe 82 and is supplied (flows) into the communication hole 15 of the nozzle shaft 2 (jet nozzle A1).

[0071] In the injection nozzle A1, the liquid Q supplied to the communication hole 15 of the nozzle shaft 2 passes through the communication hole 15 and each gas-liquid flow hole 39 of the guide disk 33, and flows into the mist throttle hole 6, as shown in FIG.

[0072] The liquid Q that has flowed into the mist throttle hole 6 flows through the first mist flow path α and the second mist flow path β, as shown in FIG. As the liquid Q flows through the first mist flow path α and the second mist flow path β, its pressure is reduced while its flow rate increases, and it is then sprayed from the first mist flow path α and the second mist flow path β into the mist throttle hole 6 on the nozzle throttle hole 5 side. The liquid Q passes through the mist throttle hole 6 and the nozzle throttle hole 5, becoming a large number of liquid particles with a large amount of microbubbles and ultrafine bubbles mixed in and dissolved therein, and is sprayed from the nozzle throttle hole 5 of the spray nozzle A1 having a spray angle 2θ into the air (the air between the spray nozzle A1 and the projection surface W). A large number of liquid particles ejected from the first mist flow passage α and the second mist flow passage β to the mist throttle hole 6 on the nozzle throttle hole 5 side become turbulent under high pressure.

[0073] When a large number of liquid particles are sprayed from the nozzle restriction hole 5 (jet nozzle A1) into the air (the air between the jet nozzle A1 and the projection surface W), a negative pressure state is created on the outlet side of the nozzle restriction hole 5 (the side from which the large number of liquid particles are sprayed). By creating a negative pressure state on the outlet side of the nozzle restriction hole 5, a large number of high-pressure and turbulent liquid particles flow out from the first mist flow path α and the second mist flow path β to the mist restriction hole 6 on the nozzle restriction hole 5 side.As they pass through the outlet part of the mist restriction hole 6 (nozzle restriction hole 5 side), air bubbles precipitate due to the reduced pressure, and the gas (air) entrained during spraying is crushed (sheared) by the turbulent flow, and a large number of fine bubbles and ultra-fine bubbles are further mixed in, turning into a large number of liquid particles. As shown in Figs. 1 to 4, a large number of liquid particles pass through the mist throttle hole 6 and are sprayed from the nozzle throttle hole 5 of the spray nozzle A1 into the air (the air between the spray nozzle A1 and the projection surface W).

[0074] As shown in Figures 1 to 4, the spray nozzle A1 has a spray angle 2θ and sprays a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air (the air between the spray nozzle A1 and the projection surface W) and onto the projection surface W, forming a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air (the air between the spray nozzle A1 and the projection surface W). The spray nozzle A1 sprays a large number of liquid particles into the air (the air between the spray nozzle A1 and the projection surface W) and onto the projection surface W at a spray angle 2θ, forming a conical three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed in and dissolved therein) are dispersed in the air (the air between the spray nozzle A1 and the projection surface W). As shown in FIG. 2, the three-dimensional screen S1 is formed in the air (the air between the spray nozzle A1 and the projection surface W) into a conical shape (theoretical conical shape) that gradually widens in diameter from the spray nozzle A1 toward the projection surface W, and into which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally (three-dimensionally).

[0075] As shown in Figures 1 and 2, the image projection system X1 sprays a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from the spray nozzle A1 to form a three-dimensional screen S1 (a conical three-dimensional screen) in which a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed in the air (the air between the spray nozzle A1 and the projection surface W), and then emits image light B from the projector Z.

[0076] As shown in Figures 1 and 2, the projector Z emits image light B onto a stereoscopic screen S1 (a cone-shaped stereoscopic screen formed in the air between the ejection nozzle A1 and the projection surface W) and onto the projection surface W, projecting the image stereoscopically (three-dimensionally) onto the stereoscopic screen S1 and onto the projection surface W.

[0077] The image projection system according to the second embodiment will be described with reference to FIGS. 14 and 15, the same reference numerals as those in FIGS. 1 to 13 denote the same configurations and members, and detailed description thereof will be omitted.

[0078] 14 and 15, the second embodiment of the image projection system (hereinafter referred to as "image projection system X2") forms a three-dimensional screen S1 in the air between the injection nozzle A1 and the liquid surface W of the storage tank P, and emits image light B onto the three-dimensional screen S1 formed in the air, thereby projecting the image light B three-dimensionally on the three-dimensional screen S1.

[0079] The image projection system X2 includes a three-dimensional screen device Y1, a projector Z, and a reservoir P for storing a liquid Q, as shown in FIG.

[0080] In the image projection system X2, as shown in FIGS. 14 and 15, the three-dimensional screen device Y1 has an ejection nozzle A1.

[0081] In the image projection system X2, the ejection nozzle A1 has a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, as described in Figures 5 to 13, and has the same configuration as the ejection nozzle A1 of the image projection system X1 (see Figures 5 to 13).

[0082] The storage tank P is a water tank that stores a large number of liquid particles as liquid Q sprayed from the spray nozzle A1, as shown in FIG.

[0083] As shown in FIG. 14, the storage tank P has a tank body 51 and a closure plate 52 (bottom plate) (hereinafter referred to as "closure plate 52").

[0084] 14 and 15, the tank body 51 is formed in a cylindrical shape, for example, in a cylindrical shape with a rectangular (quadrilateral) cross section. The tank body 51 has a tank height Hp (tank depth) (hereinafter referred to as "tank height Hp") in the direction of the cylinder center line c of the tank body 51 (tank height direction) (hereinafter referred to as "tank height direction C"), a tank length Lp in a direction D (tank length direction) (hereinafter referred to as "tank length direction D") perpendicular to the cylinder center line c, and a tank width Wp in a direction E (hereinafter referred to as "tank width direction E") perpendicular to the tank height direction C and the tank length direction D.

[0085] 14, the closure plate 52 has a front plate surface 52A and a back plate surface 52B in the plate thickness direction. The closure plate 52 abuts the front plate surface 52A against one cylindrical end 51A of the tank body 51 to close the one cylindrical end 51A of the tank body 51. The closure plate 52 is fixed to the tank body 51 by abutting the front plate surface 52A against the one cylindrical end 51A of the tank body 51.

[0086] 14 and 15, the storage tank P has the other cylindrical end 51B of the tank body 51 opened, and has an opening 53 at the other cylindrical end 51B. The opening 53 is formed at the other cylindrical end 51B of the tank body 51.

[0087] As shown in Fig. 14, the storage tank P is connected to a discharge pipe 55 and an on-off valve 56. The discharge pipe 55 penetrates the closing plate 52 of the storage tank P and is connected to the inside of the storage tank P. The on-off valve 56 is disposed on the discharge pipe 55 and is manually operated to open and close the discharge pipe 55. By manually operating the on-off valve 56, the discharge pipe 55 is opened and the liquid Q stored in the storage tank P is discharged to the discharge pipe 55. By manually operating the on-off valve 56 and closing the discharge pipe 55, the inside of the storage tank P is isolated from the discharge pipe 55.

[0088] 14 and 15, the image projection system X2 has an ejection nozzle A1 and a projector Z disposed in the air above the liquid surface W stored in a storage tank P.

[0089] 14, in the image projection system X2, the ejection nozzle A1 is disposed at an ejection interval H1 above the liquid level W stored in the storage tank P. The liquid level W of the liquid Q stored in the storage tank P becomes the projection surface W (hereinafter the same). The jet nozzle A1 is disposed in the tank height direction C with a jet interval H1 between the jet nozzle A1 and the liquid level W of the storage tank P. The jet nozzle A1 is disposed at an opening 53 of the storage tank P in the tank height direction C at a jet interval Hα. The injection nozzle A1 is disposed at an injection interval Hα from the opening 53 of the storage tank P, with the opening 53 positioned between the opening 53 and the liquid level W of the storage tank P in the tank height direction C.

[0090] In the image projection system X2, the ejection nozzle A1 is disposed so that the ejection direction V is directed toward the opening 53 of the storage tank P and toward the W stored in the storage tank P, as shown in FIGS. The injection nozzle A1 is disposed opposite to the liquid level W of the storage tank P through an opening 53 of the storage tank P. The injection nozzle A1 is disposed at an inclination angle θx with respect to the liquid level W of the storage tank P.

[0091] In the image projection system X2, the projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P, as shown in Fig. 14. The projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P in the tank height direction C, with the injection nozzle A1 positioned between the projector Z and the liquid level W of the storage tank P. The projector Z is disposed at a projection distance Hβ from the opening 53 of the storage tank P in the tank height direction C. The projector Z is disposed at a projection distance Hβ from the opening 53 of the storage tank P, with the injection nozzle A1 positioned between the projector Z and the liquid level W of the storage tank P in the tank height direction C.

[0092] 14, the projector Z is disposed at a distance T from the injection nozzle A1 in the tank length direction D. The projector Z is disposed so that the injection direction K faces the opening 53 of the storage tank P and faces the liquid level W of the storage tank P. The projector Z is disposed so that the injection direction K is perpendicular to the liquid level W of the storage tank P. The projector Z emits image light B toward the air between the ejection nozzle A1 and the liquid surface W of the storage tank P, and toward the liquid surface W of the storage tank P.

[0093] In the image projection system X2, as shown in FIGS. 3, 4, 14 and 15, a liquid Q is supplied from a liquid supply source 81 through a supply pipe 82 to an ejection nozzle A1.

[0094] In the image projection system X2, the injection nozzle A1 has an injection angle 2θ, as explained in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) from the nozzle throttle hole 5 into the air between the injection nozzle A1 and the liquid level W of the storage tank P, forming a three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) are dispersed in the air between the injection nozzle A1 and the liquid level W of the storage tank P. 14, a large number of liquid particles injected from the injection nozzle A1 pass through the opening 53 of the storage tank P and are injected onto the liquid surface W of the storage tank P. A large number of liquid particles are injected from the injection nozzle A1 into the storage tank P. As shown in Figures 3, 4 and 14, the injection nozzle A1 injects a large number of liquid particles into the air between the injection nozzle A1 and the liquid level W of the storage tank P, and onto the liquid level W of the storage tank P, at an injection angle of 2θ, thereby forming a conical three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed in the air between the injection nozzle A1 and the liquid level W of the storage tank P.

[0095] As shown in FIG. 15, the three-dimensional screen S1 is formed in the air between the spray nozzle A1 and the liquid surface W of the liquid Q stored in the storage tank P, in a conical shape whose diameter gradually widens from the spray nozzle A1 toward the liquid surface W of the storage tank P, and into which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed therein) are dispersed three-dimensionally.

[0096] As shown in Figures 14 and 15, the image projection system X2 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from the spray nozzle A1 to form a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air between the spray nozzle A1 and the liquid surface W of the storage tank P, and then emits image light B from the projector Z.

[0097] As shown in Figures 14 and 15, the projector Z emits image light B onto the stereoscopic screen S1 and the liquid surface W of the storage tank P, projecting the image stereoscopically (three-dimensionally) onto the stereoscopic screen S1 and projecting the image onto the liquid surface W of the storage tank P.

[0098] The image projection system according to the third embodiment will be described with reference to FIGS. 16 and 17, the same reference numerals as those in FIGS. 1 to 15 denote the same members and structures, and detailed description thereof will be omitted.

[0099] 16 and 17, an image projection system of a third embodiment (hereinafter referred to as "image projection system X3") forms a first stereoscopic screen S1 in the air between a first injection nozzle A1 and the liquid level W of a storage tank P, forms a second stereoscopic screen S2 in the air between a second injection nozzle A2 and the liquid level W of a storage tank P, and emits image light B onto the first stereoscopic screen S1 and the second stereoscopic screen S2 formed in the air, thereby projecting the image light B in a stereoscopic manner (three-dimensionally) onto the first stereoscopic screen S1 and the second stereoscopic screen S2.

[0100] The image projection system X3 includes a three-dimensional screen device Y2, a projector Z, and a reservoir P for storing a liquid Q, as shown in FIG.

[0101] As shown in FIGS. 16 and 17, the three-dimensional screen device Y2 has a first jet nozzle A1 and a second jet nozzle A2.

[0102] As explained in FIGS. 5 to 13, the first injection nozzle A1 and the second injection nozzle A2 have a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, and have the same configuration as the injection nozzle A1 of the image projection system X1 (see FIGS. 5 to 13).

[0103] In the image projection system X3, the first ejection nozzle A1 and the second ejection nozzle A2 are connected to a liquid supply source 81, and liquid Q is supplied from the liquid supply source 81, as shown in FIGS.

[0104] The first jet nozzle A1 is disposed with the other shaft end 2B of the nozzle shaft 2 connected to a supply pipe 82. The supply pipe 82 is connected to the other shaft end 2B of the nozzle shaft 2 of the first jet nozzle A1 and a liquid supply source 81.

[0105] The second injection nozzle A2 is disposed with the other shaft end 2B of the nozzle shaft 2 connected to a supply pipe 85. The supply pipe 85 is connected to the other shaft end 2B of the nozzle shaft 2 of the second injection nozzle A2 and the liquid supply source 81.

[0106] As shown in Figure 16, the first spray nozzle A1 and the second spray nozzle A2 are arranged in the tank length direction D (first direction) (parallel to the liquid level W of the storage tank P) (hereinafter simply referred to as the "tank length direction D") with a nozzle arrangement spacing H3 between the first spray nozzle A1 and the second spray nozzle A2.

[0107] 16, the first jet nozzle A1 and the second jet nozzle A2 are arranged at a jet interval H1 above the liquid level W of the liquid Q stored in the storage tank P. The first jet nozzle A1 and the second jet nozzle A2 are arranged at a jet interval H1 above the liquid level W of the storage tank P in a tank height direction C (second direction) (hereinafter simply referred to as "tank height direction C") (perpendicular to the liquid level W of the storage tank P). The first jet nozzle A1 and the second jet nozzle A2 are arranged at an injection interval Hα from the opening 53 of the storage tank P in the tank height direction C. The first jet nozzle A1 and the second jet nozzle A2 are arranged at an injection interval H1 from the liquid level W of the storage tank P in the tank height direction C, with the opening 53 of the storage tank P located between them and the liquid level W of the storage tank P.

[0108] 16, in the image projection system X3, the first jet nozzle A1 and the second jet nozzle A2 are arranged so that the jet direction V faces the opening 53 of the storage tank P and faces the liquid level W of the liquid Q stored in the storage tank P. The first jet nozzle A1 and the second jet nozzle A2 are arranged to face the liquid level W of the storage tank P through the opening 53 of the storage tank P.

[0109] The first jet nozzle A1 is disposed so as to be inclined in one direction (clockwise direction) with respect to the liquid level W of the storage tank P at an inclination angle θx, as shown in FIG.

[0110] The second injection nozzle A2 is disposed at an inclination angle θx in the other direction (counterclockwise direction) with respect to the liquid level W of the storage tank P, as shown in FIG.

[0111] The first spray nozzle A1 and the second spray nozzle A2 are arranged at an angle, as shown in Figures 16 and 17, and are positioned between the first spray nozzle A1 and the second spray nozzle A2, facing the liquid level W of the storage tank P through the opening 53 of the storage tank P.

[0112] 16, the projector Z is disposed between the first jet nozzle A1 and the second jet nozzle A2 at a distance H4 from each of the first jet nozzle A1 and the second jet nozzle A2 in the tank length direction D. The projector Z is disposed in the center (center) between the first jet nozzle A1 and the second jet nozzle A2 in the tank length direction D.

[0113] 16, the projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P in the tank height direction C. The projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P in the tank height direction C, with the first jet nozzle A1 and the second jet nozzle A2 positioned between the projector Z and the liquid level W of the storage tank P. 16, the projector Z is disposed at a projection distance Hγ from the opening 53 of the storage tank P in the tank height direction C. The projector Z is disposed at a projection distance Hγ from the opening 53 of the storage tank P in the tank height direction C, with the first jet nozzle A1 and the second jet nozzle A2 positioned between the projector Z and the opening 53 of the storage tank P. 16, the projector Z is disposed so that the injection direction K faces the opening 53 of the storage tank P and faces the liquid surface W of the storage tank P. The projector Z is disposed so that the injection direction K is perpendicular to the liquid surface W of the storage tank P. As shown in Figures 16 and 17, the projector Z emits image light B into the air between the first ejection nozzle A1 and the liquid level W of the storage tank P, into the air between the second ejection nozzle A2 and the liquid level W of the storage tank P, and toward the liquid level W of the storage tank P.

[0114] 16 and 17, the image projection system X3 supplies liquid Q to a first jet nozzle A1 and a second jet nozzle A2 from a liquid supply source 81. The liquid Q from the liquid supply source 81 passes through a supply pipe 82 and a supply pipe 85 and is supplied (flows) into the communication holes 15 of the first jet nozzle A1 and the second jet nozzle A2.

[0115] As explained in Figures 3 and 4, the first injection nozzle A1 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) from the nozzle throttle hole 5 into the air between the first injection nozzle A1 and the liquid level W of the storage tank P, forming a first three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) are dispersed in the air between the first injection nozzle A1 and the liquid level W of the storage tank P. 16 and 17, a large number of liquid particles from the first injection nozzle A1 are injected through the opening 53 of the storage tank P onto the liquid surface W of the liquid Q stored in the storage tank P. A large number of liquid particles from the first injection nozzle A1 are injected into the storage tank P. As shown in Figures 3, 4 and 16, the first injection nozzle A1 injects a large number of liquid particles into the air between the first injection nozzle A1 and the liquid level W of the storage tank P, and onto the liquid level W of the storage tank P, at an injection angle 2θ, thereby forming a conical first three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed therein) are dispersed in the air between the first injection nozzle A1 and the liquid level W of the storage tank P.

[0116] As shown in FIG. 17, the first three-dimensional screen S1 is formed in the air between the first spray nozzle A1 and the liquid surface W of the liquid Q stored in the storage tank P, in a conical shape whose diameter gradually widens from the first spray nozzle A1 toward the liquid surface W of the storage tank P, and into which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0117] As explained in Figures 3 and 4, the second injection nozzle A2 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) from the nozzle throttle hole 5 into the air between the second injection nozzle A2 and the liquid level W of the storage tank P, forming a second three-dimensional screen S2 in which a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) are dispersed, superimposed on a part of the first three-dimensional screen S1, in the air between the second injection nozzle A2 and the liquid level W of the storage tank P. 16 and 17, a large number of liquid particles from the second injection nozzle A2 are injected through the opening 53 of the storage tank P onto the liquid surface W of the liquid Q stored in the storage tank P. A large number of liquid particles from the second injection nozzle A2 are injected into the storage tank P.

[0118] As shown in Figures 3, 4 and 16, the second injection nozzle A2 injects a large number of liquid particles into the air between the second injection nozzle A2 and the liquid level W of the storage tank P, and onto the liquid level W of the storage tank P, at an injection angle 2θ, thereby forming a conical second three-dimensional screen S2 in the air between the second injection nozzle A2 and the liquid level W of the storage tank P, which is superimposed on a part of the first three-dimensional screen S1 and in which a large number of liquid particles (a large number of liquid particles mixed with and dissolved in a large number of fine bubbles and ultra-fine bubbles) are dispersed.

[0119] As shown in FIG. 17, the second three-dimensional screen S2 is formed in the air between the second injection nozzle A2 and the liquid surface W of the liquid Q stored in the storage tank P, in a conical shape whose diameter gradually widens from the second injection nozzle A2 toward the liquid surface W of the storage tank P, and into which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed therein) are dispersed three-dimensionally.

[0120] As shown in Figures 16 and 17, the first injection nozzle A1 and the second injection nozzle A2 overlap part of the first stereoscreen S1 and part of the second stereoscreen S2 in the tank length direction D, forming the first stereoscreen S1 and the second stereoscreen S2 in a continuous, uninterrupted manner. The first stereoscreen S1 and the second stereoscreen S2 are formed continuously and without interruption in the longitudinal direction D of the tank. As shown in Figure 16, the nozzle arrangement spacing H3 is a spacing that enables the first stereoscopic screen S1 and the second stereoscopic screen S2 to be formed continuously and without interruption in the tank length direction D by overlapping a portion of the first stereoscopic screen S1 formed by the first spray nozzle A1 and a portion of the second stereoscopic screen S2 formed by the second spray nozzle A2.

[0121] As shown in Figures 16 and 17, the image projection system X3 sprays a large number of liquid particles (a large number of liquid particles with a large amount of fine and ultra-fine bubbles mixed and dissolved in it) from a first spray nozzle A1 to form a first three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air between the first spray nozzle A1 and the liquid level W of the storage tank P, and sprays a large number of liquid particles (a large number of liquid particles with a large amount of fine and ultra-fine bubbles mixed and dissolved in it) from the second spray nozzle A2 to form a second three-dimensional screen S2 in which a large number of liquid particles are dispersed and superimposed on a part of the first three-dimensional screen S1 in the air between the second spray nozzle A2 and the liquid level W of the storage tank P, and then emits image light B from the projector Z.

[0122] As shown in Figures 16 and 17, the projector Z emits image light B onto the first stereoscopic screen S1, the second stereoscopic screen S2, and the liquid surface W of the storage tank P, projecting the image stereoscopically (three-dimensionally) onto the first stereoscopic screen S1 and the second stereoscopic screen S2, and projecting the image onto the liquid surface W of the storage tank P.

[0123] An image projection system X4 according to the fourth embodiment will be described with reference to FIGS. 18 to 20, the same reference numerals as those in FIGS. 1 to 17 denote the same members and configurations, and detailed description thereof will be omitted.

[0124] 18 and 19, a fourth embodiment of the image projection system (hereinafter referred to as "image projection system X4") forms a plurality of three-dimensional screens S1, S2, S3, ..., Sn in the air between each of a plurality of injection nozzles A1, A2, A3, ..., An and the liquid surface W of a storage tank P, and emits image light B to the plurality of three-dimensional screens S1, S2, S3, ..., Sn formed in the air, thereby projecting the image light B three-dimensionally (in three dimensions) on each of the three-dimensional screens S1, S2, S3, ..., Sn.

[0125] The image projection system X4 includes a three-dimensional screen device Y3, a projector Z, and a reservoir P for storing a liquid Q, as shown in FIG.

[0126] Each of the n (plural) injection nozzles A1, A2, A3, ..., An has a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, as described in Figures 5 to 13, and has the same configuration as the injection nozzle A1 of the image projection system X1 (see Figures 5 to 13).

[0127] As shown in FIGS. 18 and 19, each of the n (plural) jet nozzles A1, A2, A3, . . . , An is connected to a liquid supply source 81, and a liquid Q is supplied from the liquid supply source 81. Each of the jet nozzles A1, A2, A3, ..., An is arranged with the other shaft end 2B of the nozzle shaft 2 connected to a supply pipe 86. The supply pipe 86 is connected to the nozzle shaft 2 of each of the jet nozzles A1, A2, A3, ..., An and the liquid supply source 81.

[0128] As shown in Figure 19, each injection nozzle A1, A2, A3, ..., An is arranged in the tank length direction D (first direction) (parallel to the liquid level W of the storage tank P) (hereinafter simply referred to as the "tank length direction D") with a nozzle arrangement spacing H3 between each injection nozzle A1, A2, A3, ..., An. As shown in Figure 19, the n (plural) jet nozzles A1, A2, A3, ..., An are arranged in the tank length direction D in the order of first jet nozzle A1, second jet nozzle A2, third jet nozzle A3, ..., (n-1)th jet nozzle A(n-1), and nth jet nozzle An.

[0129] 18, the injection nozzles A1, A2, A3, ..., An are disposed at injection intervals H1 above the liquid level W of the liquid Q stored in the storage tank P. The injection nozzles A1, A2, A3, ..., An are disposed at injection intervals H1 above the liquid level W of the storage tank P in a tank height direction C (second direction) (hereinafter simply referred to as "tank height direction C") (perpendicular to the liquid level W of the storage tank P). 18, each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval Hα from the opening 53 of the storage tank P in the tank height direction C. Each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval Hα from the liquid level W of the storage tank P in the tank height direction C, with the opening 53 of the storage tank P located between the nozzles and the liquid level W of the storage tank P.

[0130] 18 and 19, each of the injection nozzles A1, A2, A3, . . . , An is arranged such that the injection direction V is directed toward the opening 53 of the reservoir P and toward the liquid surface W of the liquid Q stored in the reservoir P. Each of the injection nozzles A1, A2, A3, . . . , An is disposed facing the liquid level W of the storage tank P through an opening 53 of the storage tank P.

[0131] As shown in FIG. 18, the jet nozzles A1, A2, A3, . . . , An are disposed in the same direction with respect to the liquid surface W of the storage tank P at an inclination angle θx.

[0132] 19, the projector Z is disposed between the first jet nozzle A1 and the nth jet nozzle An at an arrangement interval H3 between the first jet nozzle A1, the second jet nozzle A2, the third jet nozzle A3, ..., the (n-1)th jet nozzle A(n-1), and the nth jet nozzle An in the tank length direction D. The projector Z is disposed in the center (center) between the first jet nozzle A1 and the nth jet nozzle An in the tank length direction D.

[0133] 18, the projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P in the tank height direction C. The projector Z is disposed at a projection distance H2 from the liquid level W of the storage tank P in the tank height direction C, with each jet nozzle A1, A2, A3, ..., An positioned between the projector Z and the liquid level W of the storage tank P. 18, the projector Z is disposed at a projection interval Hτ from the opening 53 of the storage tank P in the tank height direction C. The projector Z is disposed at a projection interval Hτ from the opening 53 of the storage tank P in the tank height direction C, with each jet nozzle A1, A2, A3, ..., An positioned between the projector Z and the opening 53 of the storage tank P. 18 and 19, the projector Z is disposed so that the injection direction K faces the opening 53 of the storage tank P and faces the liquid level W of the storage tank P. The projector Z is disposed so that the injection direction K is perpendicular to the liquid level W of the storage tank P. As shown in Figures 18 and 19, the projector Z emits image light B toward the air between each ejection nozzle A1, A2, A3, . . . , An and the liquid surface W of the storage tank P, and toward the liquid surface W of the storage tank P.

[0134] 18 and 19, the image projection system X4 supplies liquid Q from a liquid supply source 81 to each of the jet nozzles A1, A2, A3, ..., An. The liquid Q from the liquid supply source 81 passes through a supply pipe 86 and is supplied to the communication holes 15 of each of the jet nozzles A1, A2, A3, ..., An.

[0135] Of the first to n-th injection nozzles A1, A2, A3, ..., An arranged in a row in the longitudinal direction D of the tank, one of the adjacent injection nozzles (two adjacent injection nozzles) has an injection angle 2θ, as described in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the one injection nozzle and the liquid level W of the storage tank P, forming a three-dimensional screen in which a large number of liquid particles are dispersed in the air between the one injection nozzle and the liquid level W of the storage tank P. 18 and 19, a large number of liquid particles from one of the injection nozzles are injected through an opening 53 of the storage tank P onto a liquid surface W of the liquid Q stored in the storage tank P. A large number of liquid particles from one of the injection nozzles are injected into the storage tank P. As shown in Figs. 3, 4 and 18, one of the injection nozzles injects a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed or dissolved therein) at an injection angle of 2θ, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed or dissolved therein) are dispersed in the air between the one injection nozzle and the liquid surface W of the storage tank P.

[0136] The three-dimensional screen formed by one of the injection nozzles is a cone shape that gradually widens in diameter from the one injection nozzle toward the liquid level W of the liquid Q stored in the storage tank P in the air between the one injection nozzle and the liquid level W of the liquid Q stored in the storage tank P, and is formed into a cone shape in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0137] Of adjacent injection nozzles (two adjacent injection nozzles), the other injection nozzle has an injection angle of 2θ, as explained in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the other injection nozzle and the liquid level W of the storage tank P, forming a three-dimensional screen in which a large number of liquid particles are dispersed, superimposed on a part of the three-dimensional screen formed by one of the injection nozzles in the air between the other injection nozzle and the liquid level W of the storage tank P. 18 and 19, a large number of liquid particles from the other injection nozzle are injected through the opening 53 of the storage tank P onto the liquid surface W of the liquid Q stored in the storage tank P. A large number of liquid particles from the other injection nozzle are injected into the storage tank P. As shown in Figs. 3, 4 and 18, the other spray nozzle sprays a large number of liquid particles (a large number of liquid particles with a large number of fine and ultra-fine bubbles mixed in or dissolved therein) at a spray angle of 2θ, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles with a large number of fine and ultra-fine bubbles mixed in or dissolved therein) are dispersed in the air between the other spray nozzle and the liquid surface W of the storage tank P.

[0138] The three-dimensional screen formed by the other injection nozzle is a cone shape that gradually widens in diameter from the other injection nozzle toward the liquid surface W of the liquid Q stored in the storage tank P in the air between the other injection nozzle and the liquid surface W of the liquid Q stored in the storage tank P, and is formed into a cone shape in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0139] 18 and 19, for example, of the adjacent first and second injection nozzles A1 and A2, the first injection nozzle A1 has an injection angle 2θ as shown in FIGS. 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the first injection nozzle A1 and the liquid level W of the storage tank P, forming a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air between the first injection nozzle A1 and the liquid level W of the storage tank P. Of the adjacent first and second jet nozzles A1 and A2, the second jet nozzle A2, as shown in Figures 3 and 4, has a jet angle 2θ and jets a large number of liquid particles (a large number of liquid particles with a large amount of fine bubbles and ultra-fine bubbles mixed in and dissolved in them) from the nozzle throttle hole 5 into the air between the second jet nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed, which is superimposed on a part of the three-dimensional screen S1 formed by the first jet nozzle A1, in the air between the second jet nozzle A2 and the liquid level W of the storage tank P.

[0140] 18 and 19, for example, of the adjacent second and third injection nozzles A2 and A3, the second injection nozzle A2 has an injection angle 2θ as shown in Figs. 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the second injection nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed in the air between the second injection nozzle A2 and the liquid level W of the storage tank P. Of the adjacent second and third jet nozzles A2 and A3, the third jet nozzle A3, as shown in Figures 3 and 4, has a jet angle 2θ and jets a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the third jet nozzle A3 and the liquid level W of the storage tank P, forming a three-dimensional screen S3 in which a large number of liquid particles are dispersed, which is superimposed on part of the three-dimensional screen S2 formed by the second jet nozzle A2, in the air between the third jet nozzle A3 and the liquid level W of the storage tank P. 18 and 19, for example, of the adjacent (n-1)th injection nozzle A(n-1) and the nth injection nozzle An, the (n-1)th injection nozzle A(n-1) has an injection angle of 2θ as shown in Figs. 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the (n-1)th injection nozzle A(n-1) and the liquid level W of the storage tank P, forming a three-dimensional screen S(n-1) in which a large number of liquid particles are dispersed in the air between the (n-1)th injection nozzle A(n-1) and the liquid level W of the storage tank P. Of the adjacent (n-1)-th injection nozzle A(n-1) and the n-th injection nozzle An, the n-th injection nozzle An, as shown in Figures 3 and 4, has an injection angle of 2θ and injects a large number of liquid particles (a large number of liquid particles with a large amount of fine bubbles and ultra-fine bubbles mixed in and dissolved in them) from the nozzle throttling hole 5 into the air between the n-th injection nozzle An and the liquid level W of the storage tank P, so that a three-dimensional screen Sn in which a large number of liquid particles are dispersed is formed in the air between the n-th injection nozzle An and the liquid level W of the storage tank P, which is superimposed on a part of the three-dimensional screen S(n-1) formed by the (n-1)-th injection nozzle A(n-1).

[0141] As shown in Figure 19, each of the n (plural) injection nozzles A1, A2, A3, ..., A(n-1), An overlaps a portion of each adjacent three-dimensional screen in the tank length direction D to form each of the n (plural) three-dimensional screens S1, S2, S3, ..., S(n-1), Sn in a continuous, uninterrupted manner. As shown in FIG. 19, each of the n (plural) three-dimensional screens S1, S2, S3, . . . , S(n-1), Sn is formed continuously and without interruption in the longitudinal direction D of the tank. As shown in Figure 19, the nozzle arrangement spacing H3 is a spacing that enables n (multiple) three-dimensional screens S1, S2, S3, ..., S(n-1), Sn to be formed continuously and without interruption in the tank length direction D by overlapping parts of adjacent three-dimensional screens among the three-dimensional screens S1, S2, S3, ..., S(n-1), Sn formed by each injection nozzle A1, A2, A3, ..., A(n-1), An.

[0142] In the image projection system X4, the three-dimensional screen device Y3 has, for example, five (n=5) jet nozzles A1, A2, A3, A4, and A5 as shown in FIG.

[0143] In Figure 20, of the adjacent first and second injection nozzles A1 and A2, the first injection nozzle A1, as shown in Figures 3 and 4, has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the first injection nozzle A1 and the liquid level W of the storage tank P, forming a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air between the first injection nozzle A1 and the liquid level W of the storage tank P. Of the adjacent first and second jet nozzles A1 and A2, the second jet nozzle A2, as shown in Figures 3 and 4, has a jet angle 2θ and jets a large number of liquid particles (a large number of liquid particles with a large amount of fine bubbles and ultra-fine bubbles mixed in and dissolved in them) from the nozzle throttle hole 5 into the air between the second jet nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed, which is superimposed on a part of the three-dimensional screen S1 formed by the first jet nozzle A1, in the air between the second jet nozzle A2 and the liquid level W of the storage tank P.

[0144] In Figure 20, of the adjacent second and third injection nozzles A2 and A3, the second injection nozzle A2, as shown in Figures 3 and 4, has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the second injection nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed in the air between the second injection nozzle A2 and the liquid level W of the storage tank P. Of the adjacent second and third jet nozzles A2 and A3, the third jet nozzle A3, as shown in Figures 3 and 4, has a jet angle 2θ and jets a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the third jet nozzle A3 and the liquid level W of the storage tank P, forming a three-dimensional screen S3 in which a large number of liquid particles are dispersed, which is superimposed on part of the three-dimensional screen S2 formed by the second jet nozzle A2, in the air between the third jet nozzle A3 and the liquid level W of the storage tank P.

[0145] In Figure 20, of the adjacent third and fourth injection nozzles A3 and A4, the third injection nozzle A3, as shown in Figures 3 and 4, has an injection angle of 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the third injection nozzle A3 and the liquid level W of the storage tank P, forming a three-dimensional screen S3 in which a large number of liquid particles are dispersed in the air between the third injection nozzle A3 and the liquid level W of the storage tank P. Of the adjacent third and fourth jet nozzles A3 and A4, the fourth jet nozzle A4, as shown in Figures 3 and 4, has a jet angle of 2θ and jets a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the fourth jet nozzle A4 and the liquid level W of the storage tank P, forming a three-dimensional screen S4 in which a large number of liquid particles are dispersed, which is superimposed on a part of the three-dimensional screen S3 formed by the third jet nozzle A3 in the air between the fourth jet nozzle A4 and the liquid level W of the storage tank P.

[0146] In Figure 20, of the adjacent fourth and fifth injection nozzles A4 and A5, the fourth injection nozzle A4, as shown in Figures 3 and 4, has an injection angle of 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the fourth injection nozzle A4 and the liquid level W of the storage tank P, forming a three-dimensional screen S4 in which a large number of liquid particles are dispersed in the air between the fourth injection nozzle A4 and the liquid level W of the storage tank P. Of the adjacent fourth and fifth injection nozzles A4 and A5, the fifth injection nozzle A5, as shown in Figures 3 and 4, has an injection angle of 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle restriction hole 5 into the air between the fifth injection nozzle A5 and the liquid level W of the storage tank P, so that a three-dimensional screen S5 in which a large number of liquid particles are dispersed is formed in the air between the fifth injection nozzle A5 and the liquid level W of the storage tank P, which is superimposed on a part of the three-dimensional screen S4 formed by the fourth injection nozzle A4.

[0147] As shown in Figure 20, the five (plural) injection nozzles A1, A2, A3, A4, and A5 overlap portions of adjacent three-dimensional screens in the tank length direction D to form five (plural) three-dimensional screens S1, S2, S3, S4, and S5 in a continuous, uninterrupted manner. As shown in FIG. 20, the five (plural) stereoscopic screens S1, S2, S3, S4, and S5 are formed continuously and uninterruptedly in the longitudinal direction D of the tank.

[0148] As shown in Figures 18 to 20, the image projection system X4 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from each of n (multiple) injection nozzles A1, A2, A3, ..., An to form n (multiple) three-dimensional screens S1, S2, S3, ..., Sn in which a large number of liquid particles are dispersed in the air between each injection nozzle A1, A2, A3, ..., An and the liquid surface W of the storage tank P, and then emits image light B from the projector Z.

[0149] As shown in Figures 18 and 19, the projector Z emits image light B onto each of the n (multiple) stereoscopic screens S1, S2, S3, ..., Sn and the liquid surface W of the storage tank P, projecting the image three-dimensionally onto each of the n (multiple) stereoscopic screens S1, S2, S3, ..., Sn, and projecting the image onto the liquid surface W of the storage tank P.

[0150] The three-dimensional screen device according to the first to third embodiments will be described with reference to FIGS.

[0151] The three-dimensional screen device of the first embodiment will be described with reference to FIGS. 21 to 23, the same reference numerals as those in FIGS. 1 to 20 denote the same members and structures, and detailed description thereof will be omitted.

[0152] In FIG. 21, a three-dimensional screen device Y4 of the first embodiment (hereinafter referred to as "three-dimensional screen device Y4") forms a first three-dimensional screen S1 and a second three-dimensional screen S2 in the air.

[0153] As shown in FIGS. 21 and 22, the three-dimensional screen device Y4 includes a liquid supply pipe 91, a first jet nozzle A1, and a second jet nozzle A2.

[0154] The liquid supply pipe 91 has a liquid supply passage 92 and a plurality (two) of connecting screw holes 93. The liquid supply passage 92 is formed in the liquid supply pipe 91. The liquid supply passage 92 penetrates the liquid supply pipe 91 in the direction U of the cylinder center line u of the liquid supply pipe 91 and opens to one cylinder end 91A and the other cylinder end 91B of the liquid supply pipe 91.

[0155] Each connecting screw hole 93 is formed in the liquid supply pipe 91. Each connecting screw hole 93 is arranged at the same position in the circumferential direction of the liquid supply pipe 91. Each connecting screw hole 93 is arranged with a nozzle arrangement interval H3 between each connecting screw hole 93 in the direction U of the pipe center line u of the liquid supply pipe 91. Each connecting screw hole 93 extends in a direction perpendicular to the pipe center line u of the liquid supply pipe 91, and opens into the liquid supply path 92 and the outer circumferential surface of the liquid supply pipe 91.

[0156] In the three-dimensional screen device Y4, the first jet nozzle A1 and the second jet nozzle A2 have a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, as explained in Figs. 5 to 13, and have the same configuration as the jet nozzle A1 of the image projection system X1 (see Figs. 5 to 13).

[0157] As shown in FIG. 21, the first injection nozzle A1 and the second injection nozzle A2 are arranged in a direction U (first direction) (hereinafter simply referred to as "direction U") of the cylinder center line u of the liquid supply pipe 91, with a nozzle arrangement spacing H3 between the first injection nozzle A1 and the second injection nozzle A2. The first injection nozzle A1 and the second injection nozzle A2 are connected to the liquid supply pipe 91 with the injection direction V facing in the same direction. The first injection nozzle A1 and the second injection nozzle A2 are arranged with the injection direction V perpendicular to the cylinder center line u of the liquid supply pipe 91. The first injection nozzle A1 and the second injection nozzle A2 are airtightly (liquid-tightly) connected to the liquid supply pipe 91 by screwing the male screw portion 17 formed on the other shaft end 2B side of the nozzle shaft 2 into each connecting screw hole 93. The first injection nozzle A1 and the second injection nozzle A2 are fixed to the liquid supply pipe 91 by screwing the male screw portion 17 into each connecting screw hole 93, with the flow hole 15 communicating with the liquid supply passage 92.

[0158] 21 and 22, the three-dimensional screen device Y4 has a liquid supply pipe 91, a first jet nozzle A1, and a second jet nozzle A2 disposed in the air.

[0159] A liquid supply path 92 of the liquid supply pipe 91 is connected to a liquid supply source 81, and liquid Q is supplied from the liquid supply source 81. The liquid supply pipe 91 is arranged with one cylindrical end 91A connected to a supply pipe 94. The supply pipe 94 is connected to one cylindrical end 91A of the liquid supply pipe 91 and the liquid supply source 81. The liquid supply pipe 91 is arranged with the other cylindrical end 91B connected to a supply pipe 95. The supply pipe 95 is connected to the other cylindrical end 91B of the liquid supply pipe 91 and the liquid supply source 81. The liquid Q supplied to the liquid supply passage 92 of the liquid supply pipe 91 passes through the liquid supply passage 92 and is supplied to the communication holes 15 of the first injection nozzle A1 and the second injection nozzle A2.

[0160] As explained in Figures 3 and 4, the first injection nozzle A1 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) into the air from the nozzle throttling hole 5, forming a first three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air.

[0161] The first injection nozzle A1 injects a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) at an injection angle 2θ, thereby forming a conical first three-dimensional screen S1 in which a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) are dispersed in the air.

[0162] The first three-dimensional screen S1 is formed in the air in a conical shape that gradually expands in diameter from the first spray nozzle A1, and into which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0163] As explained in Figures 3 and 4, the second injection nozzle A2 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air, forming a second three-dimensional screen S2 in which a large number of liquid particles are dispersed and superimposed on a part of the first three-dimensional screen S1 in the air.

[0164] The second injection nozzle A2 injects a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) at an injection angle 2θ, thereby forming a conical second three-dimensional screen S2 in which a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed and superimposed on a part of the first three-dimensional screen S1 in the air.

[0165] The second three-dimensional screen S2 has a conical shape that gradually expands in diameter from the second spray nozzle A2 toward the liquid surface W of the storage tank P in the air, and is superimposed on a part of the first three-dimensional screen S1 to form a conical shape in which a large number of liquid particles (a large number of liquid particles containing and dissolved therein a large number of fine bubbles and ultra-fine bubbles) are dispersed three-dimensionally.

[0166] The first injection nozzle A1 and the second injection nozzle A2 overlap a part of the first stereoscreen S1 and a part of the second stereoscreen S2 in the direction U of the center line u of the liquid supply pipe 91, thereby forming the first stereoscreen S1 and the second stereoscreen S2 in a continuous, uninterrupted manner. The first stereoscreen S1 and the second stereoscreen S2 are formed continuously and without interruption in the direction U of the center line u of the liquid supply pipe 91.

[0167] The three-dimensional screen device Y5 according to the second embodiment will be described with reference to FIG. In FIG. 24, the same reference numerals as those in FIGS. 1 to 23 denote the same members and configurations, and detailed description thereof will be omitted.

[0168] In FIG. 24, a three-dimensional screen device Y5 of the second embodiment (hereinafter referred to as "three-dimensional screen device Y5") forms a plurality of three-dimensional screens S1, S2, S3, . . . , Sn in the air.

[0169] As shown in FIG. 24, the three-dimensional screen device Y5 has a liquid supply pipe 96 and a plurality of jet nozzles, that is, n jet nozzles A1, A2, A3, . . . , An (n is an integer of 2 or more).

[0170] The liquid supply pipe 96 has a liquid supply passage 97 and n (plurality of) connecting screw holes 98. The liquid supply passage 97 is formed in the liquid supply pipe 96. The liquid supply passage 97 penetrates the liquid supply pipe 96 in the direction J of the cylinder center line j of the liquid supply pipe 96 and opens to one cylinder end 96A and the other cylinder end 96B of the liquid supply pipe 96.

[0171] The liquid supply pipe 96 has n (plural) connecting screw holes 98, the same number of which is the same as the number of the injection nozzles A1, A2, A3, . . . , An. Each connecting screw hole 98 is disposed at the same position in the circumferential direction of the liquid supply pipe 96. Each connecting screw hole 98 is disposed at a nozzle arrangement interval H3 between each connecting screw hole 98 in the direction J of the pipe center line j of the liquid supply pipe 96. Each connecting screw hole 98 extends in a direction perpendicular to the pipe center line j of the liquid supply pipe 96 and opens into the liquid supply path 97 and the outer circumferential surface of the liquid supply pipe 96.

[0172] In the three-dimensional screen device Y5, each of the n (plural) jet nozzles A1, A2, A3, ..., An has a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, as described in Figures 5 to 13, and has the same configuration as the jet nozzle A1 of the image projection system X1 (see Figures 5 to 13).

[0173] 24, the n (plural) jet nozzles A1, A2, A3, ..., An are arranged at a nozzle arrangement interval H3 between each of the jet nozzles A1, A2, A3, ..., An in the direction J (first direction) (hereinafter simply referred to as "direction J") of the tube center line j of the liquid supply pipe 96. The n (plural) jet nozzles A1, A2, A3, ..., An are arranged in the direction J of the tube center line j of the liquid supply pipe 96 in the order of the first jet nozzle A1, the second jet nozzle A2, the third jet nozzle A3, ..., the (n-1)th jet nozzle A(n-1), and the nth jet nozzle An. Each of the injection nozzles A1, A2, A3, ..., An is connected to the liquid supply pipe 96 with the injection direction V facing in the same direction. Each of the injection nozzles A1, A2, A3, ..., An is arranged so that the injection direction V is perpendicular to the pipe center line j of the liquid supply pipe 96. Each of the injection nozzles A1, A2, A3, ..., An is airtightly (liquid-tightly) connected to the liquid supply pipe 96 by screwing a male screw portion 17 formed on the other shaft end 2B side of the nozzle shaft 2 into each connecting screw hole 98. Each of the n (plural) injection nozzles A1, A2, A3, ..., An is fixed to the liquid supply pipe 96 by connecting the flow hole 15 to the liquid supply passage 97 by screwing a male screw portion 17 formed on the other shaft end 2B side of the nozzle shaft 2 into each connecting screw hole 98.

[0174] In FIG. 24, the three-dimensional screen device Y5 has a liquid supply pipe 96 and n (plurality of) jet nozzles A1, A2, A3, . . . , An arranged in the air.

[0175] A liquid supply path 97 of the liquid supply pipe 96 is connected to the liquid supply source 81, and liquid Q is supplied from the liquid supply source 81. The liquid supply pipe 96 is arranged with one cylindrical end 96A connected to a supply pipe 94. The supply pipe 94 is connected to one cylindrical end 96A of the liquid supply pipe 96 and the liquid supply source 81. The liquid supply pipe 96 is arranged with the other cylindrical end 96B connected to a supply pipe 95. The supply pipe 95 is connected to the other cylindrical end 96B of the liquid supply pipe 96 and the liquid supply source 81. The liquid Q supplied to the liquid supply passage 97 of the liquid supply pipe 96 passes through the liquid supply passage 97 and is supplied to the communication holes 15 of each of the n (plurality of) jet nozzles A1, A2, A3, . . . , An.

[0176] The three-dimensional screen device Y5 supplies liquid Q from a liquid supply source 81 to a liquid supply pipe 96. The liquid Q from the liquid supply source 81 passes through each supply pipe 94, 05 and is supplied to a liquid supply path 97 from one cylindrical end 96A and the other cylindrical end 96B of the liquid supply pipe 96. The liquid Q supplied to the liquid supply passage 97 passes through the liquid supply passage 97 and is supplied to the communication holes 15 of each of the n (plurality of) jet nozzles A1, A2, A3, . . . , An.

[0177] Of the first to n-th injection nozzles A1, A2, A3, ..., An arranged in a row in the direction J of the cylinder center line j of the liquid supply pipe 96, one of each adjacent injection nozzle (two adjacent injection nozzles) has an injection angle 2θ as described in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) into the air from the nozzle throttling hole 5, forming a three-dimensional screen in which a large number of liquid particles are dispersed in the air. One of the spray nozzles sprays a large number of liquid particles (a large number of liquid particles containing a large number of fine and ultra-fine bubbles mixed or dissolved therein) at a spray angle of 2θ, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles containing a large number of fine and ultra-fine bubbles mixed or dissolved therein) are dispersed in the air.

[0178] The three-dimensional screen formed by one of the spray nozzles has a conical shape that gradually expands in diameter from one of the spray nozzles in the air, and is formed into a conical shape in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0179] Of the first to n-th injection nozzles A1, A2, A3, ..., An arranged in a row in the direction J of the cylinder center line j of the liquid supply pipe 96, the other of each adjacent injection nozzle (two adjacent injection nozzles) has an injection angle 2θ as described in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) into the air from the nozzle throttling hole 5, which is superimposed on a part of the three-dimensional screen formed by one of the injection nozzles in the air, forming a three-dimensional screen in which a large number of liquid particles are dispersed. The other spray nozzle sprays a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved in them) at a spray angle of 2θ, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved in them) are dispersed in the air.

[0180] The three-dimensional screen formed by the other spray nozzle has a conical shape that gradually widens in diameter from the other spray nozzle in the air, and is formed into a conical shape in which a large number of liquid particles (a large number of liquid particles containing or mixed with a large number of fine bubbles and ultra-fine bubbles) are dispersed three-dimensionally.

[0181] In FIG. 24, for example, of adjacent first and second injection nozzles A1 and A2, the first injection nozzle A1 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed therein) into the air from the nozzle throttle hole 5, forming a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air. Of the adjacent first and second jet nozzles A1 and A2, the second jet nozzle A2 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from the nozzle throttle hole 5 into the air, which is superimposed on a part of the three-dimensional screen S1 formed by the first jet nozzle A1 in the air, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed.

[0182] In FIG. 24, for example, of the adjacent second and third injection nozzles A2 and A3, the second injection nozzle A2 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed therein) into the air from the nozzle throttle hole 5, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed in the air. Of the adjacent second and third jet nozzles A2 and A3, the third jet nozzle A3 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from the nozzle throttling hole 5 into the air, which is superimposed on a part of the three-dimensional screen S2 formed by the second jet nozzle A2 in the air, forming a three-dimensional screen S3 in which a large number of liquid particles are dispersed.

[0183] In FIG. 24, for example, of the adjacent (n-1)-th injection nozzle A(n-1) and the n-th injection nozzle An, the (n-1)-th injection nozzle A(n-1) has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed therein) into the air from the nozzle throttling hole 5, forming a three-dimensional screen S(n-1) in which a large number of liquid particles are dispersed in the air. Of the adjacent (n-1)-th injection nozzle A(n-1) and the n-th injection nozzle An, the n-th injection nozzle An injects a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed and dissolved therein) from the nozzle throttling hole 5 into the air, which are superimposed on a part of the three-dimensional screen S(n-1) formed by the (n-1)-th injection nozzle A(n-1) in the air, forming a three-dimensional screen Sn in which a large number of liquid particles are dispersed.

[0184] Each of the n (plural) injection nozzles A1, A2, A3, ..., A(n-1), An overlaps a portion of each adjacent three-dimensional screen in the direction J of the center line j of the liquid supply pipe 96, thereby forming each of the n (plural) three-dimensional screens S1, S2, S3, ..., S(n-1), Sn in a continuous, uninterrupted manner. Each of the n (plural) stereoscopic screens S1, S2, S3, . . . , S(n-1), Sn is formed continuously and uninterrupted in the direction J of the center line j of the liquid supply pipe 96.

[0185] A three-dimensional screen device Y6 according to a third embodiment will be described with reference to FIGS. 25 and 26, the same reference numerals as those in FIGS. 1 to 24 denote the same members and configurations, and detailed description thereof will be omitted.

[0186] 25 and 26, the third embodiment of the three-dimensional screen device Y6 (hereinafter referred to as "three-dimensional screen device Y6") forms multiple three-dimensional screens S1, S2, S3, ..., Sn in the air between each of the multiple injection nozzles A1, A2, A3, ..., An and the liquid surface W of the storage tank P.

[0187] The three-dimensional screen device Y6 includes a liquid supply pipe 96, a plurality of n (n is an integer of 2 or more) jet nozzles A1, A2, A3, . . . , An, and a reservoir P for storing a liquid Q.

[0188] Each of the n (plural) injection nozzles A1, A2, A3, ..., An has a nozzle axis 2, a nozzle body 3, a nozzle convex portion 4, a nozzle restriction hole 5, a mist restriction hole 6, and a guide body 7, as described in Figures 5 to 13, and has the same configuration as the injection nozzle A1 of the image projection system X1 (see Figures 5 to 13).

[0189] As shown in Figure 25, each of the n (plural) injection nozzles A1, A2, A3, ..., An is arranged in the direction J of the pipe center line j of the liquid supply pipe 96, with a nozzle arrangement interval H3 between each of the injection nozzles A1, A2, A3, ..., An. Each of the injection nozzles A1, A2, A3, ..., An is connected to the liquid supply pipe 96 with the injection direction V facing in the same direction. Each of the injection nozzles A1, A2, A3, ..., An is arranged so that the injection direction V is perpendicular to the pipe center line j of the liquid supply pipe 96. Each of the injection nozzles A1, A2, A3, ..., An is airtightly (liquid-tightly) connected to the liquid supply pipe 96 by screwing a male screw portion 17 formed on the other shaft end 2B side of the nozzle shaft 2 into each connecting screw hole 98. Each of the n (plural) injection nozzles A1, A2, A3, ..., An is fixed to the liquid supply pipe 96 by connecting the flow hole 15 to the liquid supply passage 97 by screwing a male screw portion 17 formed on the other shaft end 2B side of the nozzle shaft 2 into each connecting screw hole 98.

[0190] The injection nozzles A1, A2, A3, . . . , An are arranged in the direction J of the pipe center line j of the liquid supply pipe 96 at nozzle arrangement intervals H3 between the injection nozzles A1, A2, A3, . The n (plural) injection nozzles A1, A2, A3, ..., An are arranged in the direction J of the center line j of the liquid supply pipe 96 in the order of the first injection nozzle A1, the second injection nozzle A2, the third injection nozzle A3, ..., the (n-1)th injection nozzle A(n-1), and the nth injection nozzle An.

[0191] Each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval H1 above the liquid level W of the liquid Q stored in the storage tank P. Each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval H1 above the liquid level W of the storage tank P in a tank height direction C perpendicular to the liquid level W of the storage tank P.

[0192] Each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval Hα from the opening 53 of the storage tank P in the tank height direction C. Each of the injection nozzles A1, A2, A3, ..., An is disposed at an injection interval Hα from the liquid level W of the storage tank P in the tank height direction C, with the opening 53 of the storage tank P located between the nozzles and the liquid level W of the storage tank P.

[0193] Each of the injection nozzles A1, A2, A3, . . . , An is disposed such that the injection direction V is directed toward the opening 53 of the reservoir P and toward the liquid surface W of the liquid Q stored in the reservoir P. Each of the injection nozzles A1, A2, A3, . . . , An is disposed facing the liquid level W of the storage tank P through an opening 53 of the storage tank P.

[0194] As shown in FIG. 26, the jet nozzles A1, A2, A3, . . . , An are disposed in the same direction with respect to the liquid surface W of the storage tank P at an inclination angle θx.

[0195] The three-dimensional screen device Y6 supplies liquid Q from a liquid supply source 81 to a liquid supply pipe 96. The liquid Q from the liquid supply source 81 passes through each of the supply pipes 84, 85 and is supplied to a liquid supply path 97 from one cylindrical end 96A and the other cylindrical end 96B of the liquid supply pipe 96. The liquid Q supplied to the liquid supply passage 97 passes through the liquid supply passage 97 and is supplied to the communication holes 15 of each of the n (plurality of) jet nozzles A1, A2, A3, . . . , An.

[0196] Of the first to n-th injection nozzles A1, A2, A3, ..., An arranged in a row in the direction J of the cylinder center line j of the liquid supply pipe 96, one of each adjacent injection nozzle (two adjacent injection nozzles) has an injection angle 2θ, as described in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the one injection nozzle and the liquid level W of the storage tank P, forming a three-dimensional screen in which a large number of liquid particles are dispersed in the air between the one injection nozzle and the liquid level W of the storage tank P. A large number of liquid particles from one of the injection nozzles are injected through an opening 53 of the storage tank P onto a liquid surface W of the liquid Q stored in the storage tank P. A large number of liquid particles from one of the injection nozzles are injected into the storage tank P. One of the injection nozzles injects a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) at an injection angle of 2θ, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles with a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed in the air between the one injection nozzle and the liquid surface W of the storage tank P.

[0197] The three-dimensional screen formed by one of the injection nozzles is a cone shape that gradually widens in diameter from the one injection nozzle toward the liquid level W of the liquid Q stored in the storage tank P in the air between the one injection nozzle and the liquid level W of the liquid Q stored in the storage tank P, and is formed into a cone shape in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0198] Of the first to n-th injection nozzles A1, A2, A3, ..., An arranged in a row in the direction J of the cylinder center line j of the liquid supply pipe 96, the other of each adjacent injection nozzle (two adjacent injection nozzles) has an injection angle 2θ, as described in Figures 3 and 4, and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the other injection nozzle and the liquid level W of the storage tank P, so that a three-dimensional screen in which a large number of liquid particles are dispersed is formed in the air between the other injection nozzle and the liquid level W of the storage tank P, which is superimposed on a part of the three-dimensional screen formed by one of the injection nozzles. A large number of liquid particles from the other injection nozzle are injected through the opening 53 of the reservoir tank P onto the liquid surface W of the liquid Q stored in the reservoir tank P. A large number of liquid particles from the other injection nozzle are injected into the reservoir tank P. The other spray nozzle, by spraying at an angle 2θ, disperses a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) into the air between the other spray nozzle and the liquid surface W of the storage tank P, forming a conical three-dimensional screen in which a large number of liquid particles (a large number of liquid particles having a large number of fine bubbles and ultra-fine bubbles mixed therein and dissolved therein) are dispersed.

[0199] The three-dimensional screen formed by the other injection nozzle is a cone shape that gradually widens in diameter from the other injection nozzle toward the liquid surface W of the liquid Q stored in the storage tank P in the air between the other injection nozzle and the liquid surface W of the liquid Q stored in the storage tank P, and is formed into a cone shape in which a large number of liquid particles (a large number of liquid particles containing a large number of fine bubbles and ultra-fine bubbles mixed and dissolved therein) are dispersed three-dimensionally.

[0200] 25 and 26, for example, of the adjacent first and second injection nozzles A1 and A2, the first injection nozzle A1 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the first injection nozzle A1 and the liquid level W of the storage tank P, forming a three-dimensional screen S1 in which a large number of liquid particles are dispersed in the air between the first injection nozzle A1 and the liquid level W of the storage tank P. Of the adjacent first and second jet nozzles A1 and A2, the second jet nozzle A2 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine bubbles and ultra-fine bubbles mixed in and dissolved in them) from the nozzle throttle hole 5 into the air between the second jet nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed, which is superimposed on a part of the three-dimensional screen S1 formed by the first jet nozzle A1, in the air between the second jet nozzle A2 and the liquid level W of the storage tank P.

[0201] 25 and 26, for example, of the adjacent second and third injection nozzles A2 and A3, the second injection nozzle A2 has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttle hole 5 into the air between the second injection nozzle A2 and the liquid level W of the storage tank P, forming a three-dimensional screen S2 in which a large number of liquid particles are dispersed in the air between the second injection nozzle A2 and the liquid level W of the storage tank P. Of the adjacent second and third jet nozzles A2 and A3, the third jet nozzle A3 sprays a large number of liquid particles (a large number of liquid particles containing a large amount of fine and ultra-fine bubbles mixed in and dissolved in it) from the nozzle restriction hole 5 into the air between the third jet nozzle A3 and the liquid level W of the storage tank P, forming a three-dimensional screen S3 in which a large number of liquid particles are dispersed, which is superimposed on part of the three-dimensional screen S2 formed by the second jet nozzle A2, in the air between the third jet nozzle A3 and the liquid level W of the storage tank P.

[0202] 25 and 26, for example, of the adjacent (n-1)th injection nozzle A(n-1) and the nth injection nozzle An, the (n-1)th injection nozzle A(n-1) has an injection angle 2θ and injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the (n-1)th injection nozzle A(n-1) and the liquid level W of the storage tank P, forming a three-dimensional screen S(n-1) in which a large number of liquid particles are dispersed in the air between the (n-1)th injection nozzle A(n-1) and the liquid level W of the storage tank P. Of the adjacent (n-1)-th injection nozzle A(n-1) and the n-th injection nozzle An, the n-th injection nozzle An injects a large number of liquid particles (a large number of liquid particles having a large amount of fine bubbles and ultra-fine bubbles mixed therein) from the nozzle throttling hole 5 into the air between the n-th injection nozzle An and the liquid level W of the storage tank P, which is superimposed on a part of the three-dimensional screen S(n-1) formed by the (n-1)-th injection nozzle A(n-1) in the air between the n-th injection nozzle An and the liquid level W of the storage tank P, forming a three-dimensional screen Sn in which a large number of liquid particles are dispersed.

[0203] Each of the n (plural) injection nozzles A1, A2, A3, ..., A(n-1), An overlaps a portion of each adjacent three-dimensional screen in the direction J of the center line j of the liquid supply pipe 96, thereby forming each of the n (plural) three-dimensional screens S1, S2, S3, ..., S(n-1), Sn in a continuous, uninterrupted manner. Each of the n (plural) stereoscopic screens S1, S2, S3, . . . , S(n-1), Sn is formed continuously and uninterrupted in the direction J of the center line j of the liquid supply pipe 96.

[0204] Each jet nozzle in the image projection systems of the first to fourth embodiments and the three-dimensional screen devices of the first to third embodiments may be, for example, a two-fluid nozzle, as long as it can jet a large number of liquid particles.

[0205] As each two-fluid nozzle, an internal mixing type nozzle can be used in which compressed gas and pressurized liquid are supplied to the nozzle and mixed inside the nozzle to atomize the liquid. [Industrial Applicability]

[0206] It is ideal for projecting the image light (image) emitted (projected) from the projector in a three-dimensional manner. [Explanation of symbols]

[0207] X1 Video Projection System Y1 3D screen device Z projector A1 Injection nozzle 2θ injection angle B Image light S1 3D Screen

Claims

1. A video projection system including a stereoscopic screen device and a projector, The stereoscopic screen device includes: A jet nozzle having a jet angle and jetting a large number of liquid particles is provided. The injection nozzle is Injecting the large number of liquid particles into the air to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air; The projector includes: Image light is projected onto the stereoscopic screen.

1. A video projection system comprising:

2. A video projection system including a stereoscopic screen device, a projector, and a liquid storage tank, The stereoscopic screen device includes: A jet nozzle having a jet angle and jetting a large number of liquid particles is provided. The injection nozzle is The liquid level of the storage tank is spaced apart from the liquid level in a direction perpendicular to the liquid level of the storage tank, The large number of liquid particles are injected into the air between the injection nozzle and the liquid surface, and a three-dimensional screen is formed in which the large number of liquid particles are dispersed in the air; The projector includes: Image light is projected onto the stereoscopic screen.

1. A video projection system comprising:

3. A video projection system including a stereoscopic screen device, a projector, and a liquid storage tank, The stereoscopic screen device includes: a first injection nozzle having an injection angle and configured to inject a large number of liquid particles; a second injection nozzle having an injection angle and injecting a large number of liquid particles; Each of the injection nozzles is The injection nozzles are arranged at intervals in a first direction parallel to the liquid level of the storage tank, In a second direction perpendicular to the first direction, the nozzles are disposed at an interval from the liquid surface, The first injection nozzle is the large number of liquid particles are injected into the air between the first injection nozzle and the liquid surface, and a first three-dimensional screen is formed in which the large number of liquid particles are dispersed in the air; The second injection nozzle is The large number of liquid particles are injected into the air between the second injection nozzle and the liquid surface, and a second three-dimensional screen is formed in the air, overlapping a part of the first three-dimensional screen and in which the large number of liquid particles are dispersed; The projector includes: Image light is emitted to the first stereoscopic screen and the second stereoscopic screen.

1. A video projection system comprising:

4. A video projection system including a stereoscopic screen device, a projector, and a liquid storage tank, The stereoscopic screen device includes: A plurality of injection nozzles having an injection angle and injecting a large number of liquid particles are provided, Each of the injection nozzles is The injection nozzles are arranged at intervals in a first direction parallel to the liquid level of the storage tank, In a second direction perpendicular to the first direction, the nozzles are disposed at an interval from the liquid surface, Among the adjacent jet nozzles in the jet nozzles, one of the jet nozzles is The large number of liquid particles are injected into the air between the one of the injection nozzles and the liquid surface, and a three-dimensional screen is formed in which the large number of liquid particles are dispersed in the air; Among the adjacent jet nozzles in each of the jet nozzles, the other jet nozzle is The large number of liquid particles are injected into the air between the other injection nozzle and the liquid surface, and a three-dimensional screen in which the large number of liquid particles are dispersed is formed in the air, the three-dimensional screen being superimposed on a part of the three-dimensional screen formed by the one injection nozzle; The projector includes: Each of the jet nozzles emits image light onto a stereoscopic screen.

1. A video projection system comprising:

5. A three-dimensional screen device including a first jet nozzle having a jet angle and jetting a large number of liquid particles, and a second jet nozzle having a jet angle and jetting a large number of liquid particles, Each of the injection nozzles is The injection nozzles are arranged at intervals in the first direction, The first injection nozzle is Injecting the large number of liquid particles into the air to form a first three-dimensional screen in which the large number of liquid particles are dispersed in the air; The second injection nozzle is The large number of liquid particles are sprayed into the air, and a second three-dimensional screen is formed in the air, overlapping a portion of the first three-dimensional screen and in which the large number of liquid particles are dispersed.

1. A three-dimensional screen device comprising:

6. A three-dimensional screen device having a plurality of jet nozzles each having a jet angle and jetting a large number of liquid particles, Each of the injection nozzles is The injection nozzles are arranged at intervals in the first direction, Among the adjacent jet nozzles in the jet nozzles, one of the jet nozzles is Injecting the large number of liquid particles into the air to form a three-dimensional screen in which the large number of liquid particles are dispersed in the air; Among the adjacent jet nozzles in each of the jet nozzles, the other jet nozzle is The large number of liquid particles are sprayed into the air, and a three-dimensional screen in which the large number of liquid particles are dispersed is formed in the air, overlapping a part of the three-dimensional screen formed by one of the spray nozzles.

1. A three-dimensional screen device comprising:

7. A three-dimensional screen device comprising a plurality of jet nozzles each having a jet angle and jetting a large number of liquid particles, and a storage tank for storing liquid, Each of the injection nozzles is The injection nozzles are arranged at intervals in a first direction parallel to the liquid level of the storage tank, In a second direction perpendicular to the first direction, the nozzles are disposed at an interval from the liquid surface, Among the adjacent jet nozzles in the jet nozzles, one of the jet nozzles is The large number of liquid particles are injected into the air between the one of the injection nozzles and the liquid surface, and a three-dimensional screen is formed in which the large number of liquid particles are dispersed in the air; Among the adjacent jet nozzles in each of the jet nozzles, the other jet nozzle is The large number of liquid particles are injected into the air between the other injection nozzle and the liquid surface, and a three-dimensional screen in which the large number of liquid particles are dispersed is formed in the air, overlapping a part of the three-dimensional screen formed by the one injection nozzle.

1. A three-dimensional screen device comprising:

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