JP2004041827A - Fluid convection nozzle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid convection nozzle device which can be constituted compact and can favorably circulate water in a water reservoir such as a pond and a moat. <P>SOLUTION: A fluid convection nozzle device 10 has: a hollow cylinder 11 having a square cross section and having at one end an opening serving as a sucking port 12 and at the other end an opening serving as an injection port 13; and consists of a spray means 20 which has a fluid spray port 22 disposed on the inner wall 14 of the cylinder 11 and directing to the injection port 13 and which sprays a fluid at a high speed from the fluid spray port 22 to the injection port 13. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fluid convection nozzle device, which mainly includes agitation of a fluid, formation of a vortex, forced convection, formation of a flow field at an arbitrary speed, suction and collection and removal of a liquid or a floating solid or powder, acceleration and increase of a flow. It is intended for such uses.
[0002]
[Prior art]
In the formation of convection with fluid, pipes are provided with pipes or hoses to the pump, the fluid is sucked from the intake by the power of the pump, and the sucked fluid is returned to the pond, pool, water tank, etc. to form convection. Was.
In addition, a method of rotating an electric propeller type stirring screw inside the fluid, a method of bringing a water wheel type or a multi-blade fan type impeller found in a culture pond or the like into contact with the water surface, and stirring and rotating the air (in air) Of oxygen).
[0003]
For operations such as mixing and stirring involving the injection of substances, drugs, microorganisms, feeds, etc. aimed at the effects of chemical reactions, etc., a water storage tank is provided on the ejection side of the pump, and a propeller-type electric stirring fan is used inside the tank. In many cases, a vortex is formed, and the material to be mixed is added to the tank, and when the stirring and mixing are completed, the mixture is ejected and returned to a pond, a water tank, or the like.
[0004]
In ponds, lakes and marshes, chemicals, nutrients, bactericides, microorganisms, and feeds are sprayed by hand, or by using a water flow (by tap water or pump pressure) from the mouth of a hose, A method of spraying in a mist state (with a fluid gun) by the fluid pressure of a pump or a compressor is generally used.
[0005]
[Problems to be solved by the invention]
The above-mentioned conventional convection apparatus replaces water in the pond with the amount of jet from a pump or a stirring tank, instead of, for example, a method in which convection spreads over the entire pond. Therefore, the equipment is capable of forming only a narrow range or local convection, and processing equipment such as a pump with a large ejection amount and a large tank is required to increase the replacement speed.
Further, in order to secure the replacement efficiency, it is necessary to provide an intake port at a position farthest from the position of the water inlet facility, so that there is a problem that a long thick pipe must be installed.
[0006]
In the conventional equipment, since the convection velocity is a steady flow, the flow does not reach every corner of a pond or the like having a complicated shape, so that there has been a problem that uniform processing cannot be performed. For example, generation of harmful dirt or fungi in a place where there is no flow, collection of harmful substances, stagnation, etc.
Furthermore, installing an electric propeller type stirring screw or multi-blade fan near the surface of the water or underwater requires high insulation performance including electric wiring, but it is costly as equipment, and it is costly as a facility. The risk of accidents such as contact with the screw was also high. There is also a drawback that dirt and the like easily adhere.
In addition, in the injection of chemicals, etc., since the treated liquid is returned to the pond, it must be returned to a large amount of untreated water, and it takes a long time to complete the treatment. Since the efficiency was extremely low, and the convection was not formed in a good condition, treatment with a disinfectant, etc., could cause a high concentration area for a long time, adversely affecting organisms in the pond. was there.
[0007]
SUMMARY OF THE INVENTION The present invention provides a fluid convection nozzle device that can be made compact as a whole and that can suitably convect a fluid such as water existing at an installation location, and to solve all the problems described above. It is assumed that.
[0008]
In the present invention, a fluid is a concept including not only a liquid but also a gas.
Examples of use as a liquid include tanks, aquariums, artificial ponds, swimming / swimming pools, sewage treatment plants, baths, rivers, seas (bays, bays, fishing grounds, etc.), lakes and marshes.
Examples of the use as a gas include uniformity of the temperature inside the furnace and room by convection, mixing and equalization of gas concentration, spraying and humidification of liquid, and a gas amplification mechanism (ejector).
[0009]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is a hollow cylindrical body having a rectangular cross section having an opening at one end serving as a suction port and an opening at the other end serving as a spout. A fluid ejection port facing the ejection port is provided, and ejection means for ejecting the fluid at a high speed from the fluid ejection port toward the ejection port is provided, and the suction portion of the cylindrical body is gradually reduced from the suction port side toward the ejection port side. A fluid convection nozzle device formed on a tapered surface.
[0010]
The above-described fluid convection nozzle device according to the present invention has a simple configuration in which a fluid injection port is provided on the inner wall surface of a hollow cylindrical body having a rectangular cross section, and this fluid injection port faces the injection port. , Can be made compact as a whole.
Therefore, the fluid convection nozzle device can be easily set at a desired place, can be easily pulled up after use, and does not require a large installation area at the time of installation.
[0011]
In addition, by ejecting the fluid at a high speed from the fluid ejection port toward the ejection port of the cylinder, a large amount of water in the cylinder can be ejected from the ejection port by the action of the induced flow from the rear of the device. As a result, water can be sucked into the cylinder from the suction port of the cylinder, and the sucked water can be forcibly ejected from the ejection port with a high-speed jet flow, so that the water can be suitably convected. .
[0012]
Further, since a tapered suction portion whose opening is gradually reduced from the suction port toward the jet port is provided on the suction port side of the cylinder, a relatively large amount of water can be efficiently sucked into the cylinder. Become.
[0013]
A second aspect of the present invention is characterized in that the tubular body is formed in a substantially rectangular cross section by the left and right walls and the upper and lower walls, and the fluid ejection port is provided at a position close to four corners of the tubular body.
[0014]
In this way, by providing the fluid injection ports at positions close to the four corners of the cylindrical body having a substantially rectangular cross section, the resistance of the water flowing through the center of the cylindrical body to the water can be reduced. Can be more suitably passed through.
[0015]
Claim 3 is characterized in that the cylindrical body is formed in a substantially rectangular cross section by the left and right walls and the upper and lower walls, and the fluid ejection port is provided at a position close to two corners at diagonal positions of the cylindrical body. .
[0016]
As described above, by providing the fluid ejection ports at positions close to the two corners of the diagonal position of the cylindrical body having a substantially rectangular cross section, it is possible to easily manufacture a cylinder having the same effect as that of the second aspect. .
[0017]
According to a fourth aspect of the present invention, the fluid ejection portion forming the fluid ejection port is formed in a tapered shape so as to sequentially project from the suction port side end toward the ejection port side end and toward the center of the cylindrical body. A fluid ejection port is provided at an ejection port side end of the fluid ejection section.
[0018]
By forming the fluid ejecting portion in a tapered shape from the end on the suction port side to the end on the ejection port side, the flow of water flowing in the cylinder can be prevented from being interrupted by the fluid ejecting portion, so that a large amount of water can be further reduced. It can be suitably passed.
[0019]
According to a fifth aspect of the present invention, a rod having a circular cross section is provided along the left and right walls near the left and right walls on the side of the ejection port of the cylindrical body, and a portion facing the downstream side of the rod is a flat portion. .
[0020]
In this manner, a rod having a circular cross section is provided on the jet port side of the cylindrical body, and a portion facing the downstream side of the rod is flat, so that the flow of water jetted from the jet port of the cylindrical body is controlled by the rod, By controlling the flow of water with this rod, Karman vortices can be generated in the water spouting from the spout.
[0021]
According to a sixth aspect of the present invention, a notch of a groove type is formed in the flat portion in parallel with the upper and lower walls.
[0022]
As described above, by forming a notch having a concave groove shape in a flat portion, for example, a substantially U-shaped, V-shaped cross section, a Karman vortex having a stronger force is generated in water jetted from the jet port. It is an object.
[0023]
In the fifth and sixth aspects, the notch portion attracts the generated vortex, and the rotational force of this portion is increased. This effect creates a longer (durable) vortex than a rod without a notch.
[0024]
Claim 7 is characterized in that one or more notches are formed in the flat portion.
[0025]
By setting the number of notches formed in the flat portion to one or more, Karman vortices can be more favorably generated in the water spouted from the spout.
[0026]
Claim 8 is characterized in that the upper and lower walls and / or the left and right walls of the cylindrical body are partially cut away.
[0027]
By notching a part of the upper and lower walls and / or the left and right walls of the cylinder, the surface of the notched cylinder is opened, so that convection on the notched side can be strongly configured.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a fluid convection nozzle device according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a first embodiment of a fluid convection nozzle device according to the present invention, FIG. 2 is a perspective view showing the essential parts, FIG. 3 is a plan view showing the same operation, and FIGS. FIG. 6 is an explanatory diagram showing an operation in a state where the device is disposed substantially at the center of the water storage basin, and FIG. 6 is an explanatory diagram showing an operation in a state where the device is disposed at a position shifted from substantially the center of the water storage basin.
[0029]
A fluid convection nozzle device 10 according to the first embodiment shown in FIG. 1 has a hollow cylindrical body 11 having an opening at one end serving as a suction port 12 and an opening at the other end serving as a jet port 13. The inner wall surface 14 is provided with fluid ejection ports 22 (four as an example) facing the ejection ports 13, and an ejection unit 20 for ejecting a fluid from these fluid ejection ports 22 toward the ejection ports 13 at a high speed. Is done.
[0030]
The cylindrical body 11 is formed in a substantially rectangular cross section by the left and right walls 11a and 11b and the upper and lower walls 11c and 11d, and the opening is gradually reduced toward the suction port 12 from the suction port 12 to the jet port 13. A suction portion 15 having a tapered shape is provided.
[0031]
At positions near the four corners 16 of the cylindrical body 11, fluid ejecting portions 21 each having a fluid ejecting port 22 are provided.
As shown in FIG. 2, the fluid ejecting section 21 has a surface 21 c that sequentially projects from the end 21 a on the suction port 12 side to the end 21 b on the ejection port 13 side toward the inside of the cylindrical body 11. A fluid ejection port 22 is provided at an end 21b on the ejection port 13 side.
[0032]
As shown in FIG. 1, at positions near the four corners 16 of the cylindrical body 11, fluid supply ports 24 (one at the back side are not shown) are provided in a state protruding outward, and these fluid supply ports 24 are provided. The port 24 communicates with the fluid ejection port 22 via a flow path (not shown) in the fluid ejection unit 21.
One end of a fluid supply channel such as a tube or a hose (not shown) is connected to each fluid supply port 24, and the other end of the fluid supply channel is connected to a fluid supply source (not shown). In addition, the fluid supply port 24 and the fluid ejection port 22 can be provided at positions close to two corners existing at diagonal positions of the cylindrical body. According to this, the configuration is simplified and the effect of the induced flow is reduced. Can be secured.
[0033]
For this reason, by driving the fluid supply source, the fluid is guided to each fluid supply port 24 via the fluid supply flow path, and from each fluid supply port 24 via the flow path of the fluid ejection unit 21 as shown in FIG. The fluid can be ejected from the four fluid ejection ports 22 at a high speed in the direction of arrow A.
[0034]
Here, as shown in FIG. 3, the end 21b of the fluid ejection unit 21 on the ejection port 13 side is inclined at an angle α. Therefore, the fluid from the fluid ejection port 22 can be ejected at a high speed while being inclined by the angle α toward the central axis of the cylinder 11 as shown by the arrow A.
In this way, by inclining the jet direction of the fluid toward the central axis of the cylinder 11 by the angle α, the fluid can be separated from the inner wall surface 14 of the cylinder 11 (see FIG. 1). Fluid can be efficiently ejected toward the device, and a suction force acts behind the device, so that a guided flow can be obtained.
[0035]
Next, the operation of the fluid convection nozzle device 10 will be described with reference to FIGS.
First, a fluid supply channel (not shown) is connected to the fluid supply port 24 of the fluid convection nozzle device 10 shown in FIG. 3, and a fluid supply source (not shown) such as a high-pressure small pump is connected to the fluid supply port 24. I do. In this state, the fluid convection nozzle device 10 is set at a desired installation location.
[0036]
Here, the fluid convection nozzle device 10 of the present invention can have a compact configuration in which only the fluid ejection port 22 is provided on the inner wall surface 14 (see FIG. 1) of the hollow cylindrical body 11. The nozzle device 10 can be easily set at the installation location.
After the use of the fluid convection nozzle device 10, the fluid convection nozzle device 10 can be easily lifted from the installation location.
[0037]
After the fluid convection nozzle device 10 is set, the fluid supply source is driven to supply a fluid into the fluid ejection unit 21 via the fluid supply port 24, and the fluid is supplied to a flow path (not shown) in the fluid ejection unit 21. 3), the fluid is guided to the fluid ejection port 22, and the fluid is ejected from the fluid ejection port 22 toward the ejection port 13 of the cylinder 11 at a high speed in the direction of arrow A as shown in FIG.
[0038]
The flow A, which is injected at a high speed from the fluid injection port 22 at an inclined angle, and the induced flow B from the rear of the device, which is sucked by the force of the flow A, enter the inside of the cylinder 11 from the suction port 12 and accelerate the flow A To join. By providing the flow path with the tapered suction portion 15 on the suction port 12 side of the cylindrical body 11, a large amount of water can be sucked in with low frictional resistance.
[0039]
Although the jet port 13 also expands in a tapered shape, similarly, the low pressure loss and the discharge flow C are slightly diffused, so that the external induction flow D can be strongly drawn.
[0040]
Next, as shown in FIG. 1, the fluid ejecting portion 21 is provided at a position close to the four corners 16 of the cylindrical body 11, and the surface 21 c of the fluid ejecting portion 21 is formed in a tapered shape as shown in FIG. The structure of the injection unit 21 can be a structure that does not hinder the flow of water, and the water taken into the cylinder 11 can flow smoothly in the cylinder 11.
[0041]
As described above, a relatively large amount of water is sucked into the cylindrical body 11 and the water taken into the cylindrical body 11 flows smoothly in the cylindrical body 11, so that water is continuously discharged from the suction port 12 of the cylindrical body 11. Thus, the sucked water can be continuously and efficiently ejected from the ejection port 13 as shown by an arrow C (see FIG. 3).
At this time, since the water existing around the cylindrical body 11 can flow as shown by the arrow D, it is possible to exert a convection effect by the induced flow also in this portion.
[0042]
FIG. 4 shows a state in which the fluid convection nozzle device 10 is set at substantially the center of the water reservoir 30 with the upper and lower walls 11c and 11d (see FIG. 1 for 11d) of the cylindrical body 11 arranged vertically, and the fluid convection nozzle device 10 is operated. Then, water is sucked into the cylindrical body 11 from the suction port 12 of the cylindrical body 11 as shown by the arrow B, and the sucked water is efficiently ejected from the jet port 13 as shown by the arrow C. A state in which water in the area on the side of the walls 11a and 11b is suitably convected as indicated by an arrow D is shown.
[0043]
FIG. 5 shows that the fluid convection nozzle device 10 is set at the approximate center of the water storage 30 by arranging the left and right walls 11a and 11b (see FIG. 1 for 11b) of the cylinder 11 up and down. This shows a state in which water in the areas on the upper and lower walls 11c and 11d is suitably convected as indicated by an arrow D.
[0044]
As described above, according to the fluid convection nozzle device 10 of the present invention, the water in the area on the left and right walls 11a and 11b side of the cylindrical body 11 is suitably convected as shown by the arrow D, and the upper and lower walls 11c and The water in the area on the 11d side can also be suitably convected as indicated by arrow D.
[0045]
The convection of the arrow D described above is a function of the induced flow by the fluid, and it is possible to generate the effective induced flow B by the jet flow C despite the water existing outside the cylinder pair. This is due to the results obtained.
[0046]
4 and 5, an example in which the fluid convection nozzle device 10 is set substantially at the center of the water storage 30 has been described. However, the fluid convection nozzle device 10 is set off from the center of the water storage 30 as shown in FIG. It is also possible.
[0047]
Also in this case, as in the case of FIGS. 4 and 5, water in the area on the left and right walls 11 a and 11 b of the cylindrical body 11 and water in the area on the upper and lower walls 11 c and 11 d of the cylindrical body 11 are suitable as shown by the arrow D. Convection.
For this reason, even if the fluid convection nozzle device 10 of the present invention is set relatively loosely, a sufficiently effective convection generation effect can be obtained, so that handling is easy.
[0048]
Here, when it is desired to change the strength of convection between the left and right or up and down of the cylindrical body 11, it can be dealt with by cutting out the wall surface of the cylindrical body 11 on the side desired to be strengthened. It can be adjusted freely according to the request of the place.
[0049]
Next, a second embodiment will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0050]
A fluid convection nozzle device 40 according to the second embodiment shown in FIG. 7 includes a hollow cylindrical body 11 having an opening at one end serving as a suction port 12 and an opening at the other end serving as a jet port 13. The inner wall surface 14 is provided with a fluid ejection port 22 facing the ejection port 13, and ejection means 20 for ejecting a fluid from the fluid ejection port 22 toward the ejection port 13 at a high speed. It consists of a pair of rods 41 provided near the walls 11a, 11b along the left and right walls 11a, 11b.
[0051]
That is, in the fluid convection nozzle device 40 of the second embodiment, a pair of rods 41 are attached by screws 43 along the left and right walls 11a and 11b near the left and right walls 11a and 11b on the side of the ejection port 13 of the cylindrical body 11. Only the difference from the first embodiment is that the other configuration is the same as that of the first embodiment.
[0052]
The rod 41 has a substantially circular cross section as shown in FIG. 8, and is formed with a screw hole 44 penetrating from the upper end to the lower end, and a portion facing the downstream side of the outer peripheral surface 41 a of the rod 41 is formed in the flat portion 42. Is formed.
By screwing a screw 43 shown in FIG. 7 into the screw hole 44, the rod 41 can be attached to the cylindrical body 11.
[0053]
In addition, by providing the rod 41 with the flat portion 42, the flow of water spouted from the spout 13 of the cylinder 11 can be controlled by the rod 41.
By controlling the flow of water with the rod 41, the Karman vortex 45 can be efficiently generated in the water jetted from the jet port 13 as shown in FIG.
[0054]
Thereby, as shown in FIG. 10, the fluid can be ejected from the fluid ejection port 22 in the direction of the arrow A, and the Karman vortex 45 can be generated in the ejection flow B ejected from the ejection port 13.
[0055]
Next, third and fourth embodiments will be described with reference to FIGS.
In the third and fourth embodiments, the same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.
In the fluid convection nozzle device according to the third embodiment shown in FIG. 11, a portion facing the downstream side of the outer peripheral surface 41a of the rod 51 is formed in the flat portion 42, and a notch having a substantially V-shaped cross section is formed substantially in the center of the flat portion 42. 52 are formed parallel to the upper and lower walls.
[0056]
As described above, by providing the notch 52 in the flat portion 42, the Karman vortex 45 (see FIG. 10) is efficiently generated in the water (jet flow B) jetted from the jet port 13 (see FIG. 7) of the cylindrical body 11. be able to.
By forming the notch 52 formed in the flat portion 42 as a single piece, the notch 52 can be easily processed.
[0057]
The fluid convection nozzle device according to the fourth embodiment shown in FIG. 12 differs from the third embodiment only in that a plurality of (for example, three) notches 52 are formed in the flat portion 42 of the rod 61, and the other points are the same. The configuration is similar to that of the third embodiment.
By providing three notches 52 in the flat portion 42, the Karman vortex 45 (see FIG. 10) can be generated in a complicated shape in the water jetted from the jet port 13 (see FIG. 7) of the cylindrical body 11, and the stirring is performed. Performance can be improved.
[0058]
In the above-described embodiment, an example in which the fluid ejection ports 22 are provided at positions close to the four corners 16 of the cylindrical body 11 has been described. However, the arrangement position of the fluid ejection ports 22 is not limited to this, and is arbitrary. You can decide.
Further, in the above-described embodiment, the example in which the water in the reservoir is convected using the fluid convection nozzle device of the present invention is described. However, the present invention is not limited to this, and it is of course possible to convect a fluid other than water. It is.
[0059]
【The invention's effect】
As described above, according to the fluid convection nozzle device according to the first aspect, a fluid injection port is provided on the inner wall surface of a hollow cylindrical body having a rectangular cross section, and this fluid injection port is simply made to face the injection port. Since the configuration is simple, the size can be reduced.
Therefore, the fluid convection nozzle device can be easily set in the water reservoir, and can be easily pulled out of the water reservoir after use, so that the handleability can be improved.
[0060]
In addition, a guided flow is formed by injecting a fluid at a high speed from the fluid ejection port toward the ejection port of the cylinder, and a large amount of water in the cylinder can be ejected from the ejection port by the action of the induced flow. Therefore, a large amount of water can be sucked from the suction port of the cylindrical body, and the sucked water can be effectively jetted from the jet port to generate convection.
[0061]
Further, by providing the tapered suction portion on the suction port side of the cylinder, a relatively large amount of water can be efficiently sucked into the cylinder, so that the water in the water storage can be more appropriately convected.
[0062]
According to the second aspect of the present invention, since the fluid injection ports are provided at positions near the four corners of the cylindrical body having a substantially rectangular cross section, the resistance of the flow of water flowing through the cylindrical body can be reduced. Water can be smoothly passed through the cylinder.
[0063]
According to a third aspect of the present invention, a fluid injection port is provided at a position close to two diagonal positions of a cylindrical body having a substantially rectangular cross section, so that a product having the same effect as the second aspect can be easily manufactured. There is.
[0064]
According to a fourth aspect of the present invention, the resistance of the flow of water flowing through the cylinder can be reduced by forming the fluid ejecting portion in a tapered shape from the suction port end to the ejection port end. Water taken into the body can be smoothly passed through the cylinder.
[0065]
According to a fifth aspect of the present invention, a rod having a circular cross section is provided on the outlet side of the cylindrical body, and a portion facing the downstream side of the rod is a flat portion, so that the flow of water jetted from the outlet of the cylindrical body is controlled by the rod. And Karman vortices can be generated in the water spouting from the spout.
[0066]
According to the sixth aspect of the present invention, a strong Karman vortex can be generated in the water jetted from the jet port by forming a concave notch in the flat portion.
[0067]
According to a seventh aspect of the present invention, a strong Karman vortex can be generated more satisfactorily in the water spouted from the spout by forming one or more notches in the flat portion.
[0068]
According to the eighth aspect, by cutting out a part of the upper and lower walls and / or the left and right walls of the cylindrical body, the cutout surface of the cylindrical body is opened, and the convection on the cutout side can be strongly configured.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a fluid convection nozzle device according to the present invention.
FIG. 2 is a perspective view showing a main part of the first embodiment.
FIG. 3 is a plan view showing the operation of the first embodiment.
FIG. 4 is an explanatory diagram showing an operation in a state where the first embodiment is disposed substantially at the center of a water storage basin.
FIG. 5 is an explanatory diagram showing an operation in a state where the first embodiment is arranged substantially at the center of a water storage basin.
FIG. 6 is an explanatory diagram showing an operation in a state where the first embodiment is arranged at a position shifted from substantially the center of the water storage basin.
FIG. 7 is a perspective view showing a second embodiment of the fluid convection nozzle device according to the present invention.
FIG. 8 is a perspective view showing a rod according to the second embodiment.
FIG. 9 is a plan view showing the operation of the rod according to the second embodiment.
FIG. 10 is a plan view showing the operation of the second embodiment.
FIG. 11 is a perspective view showing a rod according to a third embodiment of the present invention.
FIG. 12 is a perspective view showing a rod according to a fourth embodiment of the present invention.
[Explanation of symbols]
10, 40 ... fluid convection nozzle device 11 ... cylindrical body 11a ... left wall 11b ... right wall 11c ... upper wall 11d ... lower wall 12 ... suction port 13 ... jet port 14 ... inner wall surface 15 ... tapered suction section 16 ... four corners Reference Signs List 20 injection means 21 fluid injection part 21a suction end 21b injection end 21c surface 22 fluid injection 24 fluid supply 30 water reservoirs 41, 51 such as ponds and moats Reference numerals 61, rod 41a, outer peripheral surface 42, flat portion 43, screw 44, screw hole 45, Karman vortex 52, notch

Claims (8)

A hollow cylindrical body having a rectangular cross section having an opening at one end as a suction port and an opening at the other end as an ejection port, and a fluid ejection port facing the ejection port provided on an inner wall surface of the cylinder. Fluid convection characterized by providing an injection means for injecting a fluid at a high speed from an injection port toward an injection port, and forming a suction portion of the cylindrical body on a tapered surface that gradually decreases from the suction port side toward the injection port side. Nozzle device. 2. The fluid convection nozzle device according to claim 1, wherein the tubular body is formed in a substantially rectangular cross section by left and right walls and upper and lower walls, and the fluid ejection port is provided at a position close to four corners of the tubular body. 2. The fluid injection port according to claim 1, wherein the tubular body is formed in a substantially rectangular shape in cross section by the left and right walls and the upper and lower walls, and the fluid ejection port is provided at a position close to two diagonal positions of the tubular body. Fluid convection nozzle device. The fluid ejecting portion forming the fluid ejecting port is formed in a tapered shape so as to sequentially project from the suction port side end portion toward the ejection port side end portion and toward the center of the cylindrical body. The fluid convection nozzle device according to any one of claims 1 to 3, wherein a fluid ejection port is provided at an end of the ejection port side. 5. A rod having a circular cross section is provided along the left and right walls near the left and right walls on the side of the ejection port of the cylindrical body, and a portion facing the downstream side of the rod is a flat portion. The fluid convection nozzle device according to any one of the above. The fluid convection nozzle device according to claim 5, wherein a concave notch is formed in the flat portion in parallel with the upper and lower walls. The fluid convection nozzle device according to claim 6, wherein one or more notches are formed in the flat portion. The fluid convection nozzle device according to any one of claims 1 to 7, wherein a part of upper and lower walls and / or left and right walls of the cylindrical body is cut out.

Images