Air amplifier, having a function for amplifying an airflow

Abstract

Air amplifier, having a function for amplifying an airflow, characterized in that it comprises an inner sleeve (1) and an outer sleeve (2), wherein the inner sleeve (1) is formed in one piece by a first body (11) with a larger diameter and a second body (12) with a smaller diameter, wherein a first through-hole (112) through the first body (11) is formed as a straight hole, wherein a section thereof in the first body (11) functions as a suction opening (f), wherein the first through-hole (112) has a horn-shaped section in the first body (11), wherein one end of the horn-shaped section of the first through-hole (112) with a larger diameter is arranged at the end of the inner sleeve (1) on the side of the first body (11) and acts as a suction opening (f); wherein the outer sleeve (2) is formed in one piece by a third body (21) with a larger diameter and a fourth body (22) with a smaller diameter, wherein a second through-hole (23) is formed in the outer sleeve (2), wherein a section of the fourth body (22) has a horn shape, wherein an end of the horn-shaped section of the second through-hole (23) with a larger diameter is arranged at the end of the outer sleeve (2) on the side of the fourth body (22) and functions as an outlet opening (e); wherein an outer diameter of the second body (12) corresponds to an inner diameter of a section of the second through-hole (23) in the third body (21), and the second body (12) is inserted into the second through-hole (23); wherein a groove (13) is provided in an annular circumferential direction on the second body (12) of the inner sleeve (1), and the second through-hole (23) is provided with an annular cavity (b) extending circumferentially in the section of the fourth body (22), wherein the groove (13) and the annular cavity (b) are arranged to jointly form a chamber, and a compressed air inlet (a) is provided radially on the third body (21) of the outer sleeve (2), wherein the inlet does not penetrate radially through the third body (21) but is connected with the annular cavity (b); wherein a chamfer (121) is formed at the end of the inner sleeve (1) on the side of the second body (12), several slot-shaped gaps (c) are spaced apart from each other in the circumferential direction on the chamfer (121), and a conical surface is provided on the outer sleeve (2) in the second through-hole at the contact section with the chamfer (121), wherein the conical surface is in interference fit (g) with the chamfer (121); wherein the conical surface at the connecting section with the end of the horn-shaped section of the second through-hole (23) protrudes with the smaller diameter in the direction of the axis of the second through-hole (23).

Description

[0001] The present invention relates to an amplifier having a special structure through which an air stream flows, said device being able to be used in the field of glass processing to assist the production of glass coated in a further production step.

[0002] According to the basic principle of hydrodynamics, the Coandă effect, a small amount of compressed air used as an energy source to create a high-pressure, high-velocity airflow can produce a flow rate fifty times greater than the air consumption. This can be implemented in a simple, lightweight manner at low cost and can be used to transport air, exhaust gases, and smoke, as well as lightweight materials, among others. Compressed air enters an annular cavity through an air inlet and then flows at high speed through an annular nozzle, so that this main airflow is adsorbed on the inner surface of the enclosure, resulting in a vacuum zone formed in the center of the cavity.As a result, a large amount of ambient air is sucked in, so that the main air flow and the ambient air flow are combined to form a high-speed, high-power air flow that flows out of the air amplifier.

[0003] However, suitable air amplifiers for the field of glass processing are rare. In view of this, the inventor of this application has created the present invention based on developments in relevant technical fields and continuous testing and improvements to solve the problem of the lack of air amplifiers suitable for the field of glass processing in the prior art.

[0004] Document DE4423197A1 discloses a pump consisting of two concentric tubes positioned relative to each other by bushings, forming an annular chamber connected to a compressed air supply. A nozzle with an injection channel is mounted in the lower bushing. The nozzle opening is connected to the annular air supply chamber and is shaped so that the air flow creates a negative pressure in the injection channel, so that powder is sucked from a reservoir into which the pump is immersed and pumped to the pump outlet.

[0005] From the document CH415456A a pneumatic conveying device is known, characterized in that it consists of a pressure chamber and a downstream nozzle chamber, which is separated by a partition wall provided with openings.

[0006] From document GB1530738A, a fluid flow amplifier is known. The fluid flow amplifier comprises an annular nozzle for injecting a thin film of pressurized fluid toward a deflection ring having an outer surface for axially deflecting the film toward a frustoconical surface and an inner surface defining an opening substantially larger than a throat opening. Preferably, the ring is offset from the nozzle by a distance at least three times the axial dimension of the nozzle, and the axial dimension of the nozzle can be varied by changing the thickness of an incompressible gasket. The frustoconical surface has an included angle of 10-70 degrees. The inner and outer surfaces of the ring may be frustoconical or cylindrical.

[0007] A smoke or fog generator is known from document GB2431124A. The smoke or fog generator uses a Venturi amplifier to amplify the power and velocity of air, smoke, and propellant media. The Venturi amplifier consists of a body with an inner, cylindrical wall defining a central cavity. At one end is an inlet for drawing atmospheric air into the device. At the other end of the cavity is an outlet for the amplified flow of smoke. Near the inlet is a Venturi nozzle that directs the jet of controlled medium from the inlet opening to draw in atmospheric air to amplify the flow. The device is used to project smoke or fog over long distances for visual effects in theaters.

[0008] From document GB2455351A, an air amplifier jet pump is known. The air amplifier jet pump is formed by etching channels in a flat substrate and sealed with a lid. Secondary or induced gas is introduced into a converging section of a main channel, and primary gas is introduced through slots in the channel walls at a waist in the channel and adheres to the walls of a diverging section by the Coanda effect. The primary gas induces a secondary gas flow through a Venturi-effect pressure drop.

[0009] From document US3664768A, a jet pump or fluid transformer is known comprising a housing of generally straight, tubular shape having a suction end portion and a fluid outlet end portion, and a fluid jet input device communicating with the interior of the housing at a position intermediate its opposite ends for supplying and discharging drive fluid under pressure into the housing, the housing being characterized in that it carries on its inner wall downstream of the fluid jet input device a plurality of radially inwardly offset annular bands, rings, flanges or facets spaced linearly along the housing, the rings, viewed in cross-section, extending in planes generally perpendicular to a longitudinal axis of the housing and defining fluid flow stop elements or fluid flow entraining elements operativeto align flow patterns and the physical distribution of fluid molecules impinging upon it, thereby improving the fluid wall boundary flow rate and delivering improved overall pumping performance.

[0010] From document US3795367A a device is known which uses the Coanda effect, by which a primary fluid with high velocity and small volume induces the flow of a secondary fluid, the exhaust fluid being a combination of both fluids.

[0011] Document US5762034A discloses a shroud for the cooling fan of an automotive engine. This shroud provides axial airflow in the circumferential direction between the fan blade tips and the shroud to improve fan efficiency and engine cooling. The shroud may include a circumferentially extending Coanda surface and an adjacent circular constriction that directs the airflow toward the annular space between the shroud and the fan blade tips. Adjusting the air pressure and throat dimension allows precise control of the velocity profile of the airflow through the annular space.

[0012] A compressed air booster duct is known from document JP2006291941A. The goal is to prevent energy consumption due to a flow impacting an inner wall and becoming turbulent when the flow forming a compressed air inlet duct enters a compressed air booster duct from an inlet opening while bending to the right and left. The goal is to prevent the flow from flowing back to the inlet side of the compressed air booster duct because the inlet opening, which allows the compressed air to enter the compressed air booster duct, is located close to the inlet.The compressed air booster duct, into which compressed air can be introduced through a compressed air inlet duct, allows the compressed air to flow out from an outlet forming the compressed air booster duct via a bell-shaped recess with an annular space in a continuous state and the inlet opening from a joint forming the compressed air inlet duct, wherein the compressed air flows in an approximately curved form without meandering in a shortest passage from the joint to the outlet.

[0013] Document CN101592169A discloses a pneumatic suction fan comprising an air inlet cavity, a cyclone cavity, and an air outlet cavity arranged and interconnected in a shell; the shell is provided with a compressed air introduction channel communicating with a plurality of nozzle grooves; an enclosed jet angle is formed between each nozzle groove and the center of the cyclone cavity; compressed air is jetted through the nozzle grooves into the cyclone cavity, forming a high-speed cyclone; the high-speed cyclone forms a marginal active negative pressure region and a central passive negative pressure region in the cyclone cavity under the effect of the enclosed jet angle.The extracted air is drawn through the air inlet cavity under the action of the active and passive negative pressure zones, mixed with the high-speed compressed air through the cyclone cavity, and expelled through the air outlet cavity. The pneumatic suction fan extracts the air quickly and efficiently under the combined action of the active and passive negative pressure zones. The nozzle grooves can be configured into various nozzles, allowing the high-speed cyclone to rotate quickly while allowing easy control of compressed air consumption.

[0014] Document CN201771874U discloses an air jet amplifier characterized by comprising an inner ring and an outer ring, the inner ring forming an air jet passage; an air jet inlet is arranged at one end of the air jet passage and an air outlet is arranged at the other end; the inner ring and the outer ring are connected by being embedded in an annular cavity; the inner ring and the outer ring are not closed at the air jet inlet, thereby forming an annular gap; the width of the annular gap is uniform, the range of the width being from 0.5 to 5.0 millimeters, the width being determined by the diameter of the air jet amplifier and the range of the diameter being from 100 to 2200 millimeters; the opening of the gap faces the jet air passage;The inner surface of the inner ring, extending from the annular gap to the inside of the ring, is the Coanda surface; and the outer ring is provided with a compressed air inlet that communicates with the annular cavity. The air jet amplifier has a simple structure; the main parts are only the inner ring and the outer ring; the final exhaust air flow is the sum of the intake air, the supplied compressed air, and the entrained air; and under normal conditions, the ratio of the final exhaust air flow to the intake air flow is 30 to 120 to 1.

[0015] Document US2004 / 0036185A1 discloses a differential injector for mixing fluids, comprising a primary fluid inlet, a throat section, and a diverging outlet. A secondary fluid is drawn through recessed annular grooves into the outlet by the suction effect created by the primary fluid of the venturi. A plurality of channels introduces the secondary fluid into the recessed annular grooves. The channels may be connected to an injection port for the secondary fluid via an injection ring.

[0016] From document EP0044494A1, a variable geometry nozzle is known, the nozzle having outer and inner boundaries of an annular nozzle channel, each defined by a widening surface formed internally in a female element and a tapered surface formed externally on a male element located within the female element. The element is axially adjustable relative to the element from a first position to a second position to progressively increase the cross-sectional area of ​​the throat of the nozzle channel, the boundaries being shaped to diverge from the throat toward the exit when the male element is in the first position and to be parallel when the male element is in the second position.

[0017] From document DE3630536A1, a device for generating a spiral fluid flow is known, wherein an auxiliary cylinder is connected via an annular slot to a large-diameter end of a main cylinder having a larger diameter than a pipeline, wherein a wall surface of the annular slot on the side of the main cylinder is smoothly curved to merge into an inner wall of the main cylinder, wherein a wall surface of the annular slot on the side of the auxiliary cylinder is curved to merge into an inner wall of the auxiliary cylinder, wherein the opposite end of the main cylinder has a conical shape for connection to the pipeline with a gradually decreasing diameter until it is identical to the diameter of the pipeline; and wherein means are provided for supplying a pressurized fluid to an outer side of the annular slot.

[0018] The object of this invention is to provide an air amplifier having a special structure for a passing air stream, which device can be used in the field of glass processing in which the device is used to assist the production of an offline coated glass.

[0019] To achieve this object, the present invention provides an air amplifier having a function of amplifying an air flow, comprising: an inner sleeve and an outer sleeve.

[0020] The inner sleeve is integrally formed by a first body with a larger diameter and a second body with a smaller diameter. A first through-hole is formed as a straight hole through the first body. A portion of the first through-hole in the first body functions as a suction port.

[0021] The outer sleeve is integrally formed by a third body having a larger diameter and a fourth body having a smaller diameter. A second through-hole is formed in the outer sleeve. A portion of the second through-hole in the fourth body has a horn shape, with the end of the horn-shaped portion of the second through-hole having the larger diameter being located at the end of the outer sleeve on the side of the fourth body, and the horn-shaped portion of the second through-hole functioning as an outlet port.

[0022] An outer diameter of the second body corresponds to the inner diameter of the second through hole in the portion of the third body, and the second body is inserted into the second through hole.

[0023] A groove is provided annularly in the circumferential direction on the second body of the inner sleeve, and the second through-hole is provided with an annular cavity extending circumferentially in the portion of the fourth body. The groove and the annular cavity are arranged to form a chamber. A compressed air inlet is provided radially on the third body of the outer sleeve, which does not penetrate through the third body but communicates with the annular cavity.

[0024] A chamfer is formed at the end of the inner sleeve on the side of the second body, with a plurality of slot-like gaps spaced apart from each other circumferentially distributed along the chamfer. In the second through-hole, a tapered surface is provided on the outer sleeve at the contact portion with the chamfer, the tapered surface being press-fitted with the chamfer. The tapered surface protrudes in the direction of the axis of the second through-hole at the connecting portion with the end of the horn-shaped portion with the smaller diameter in the second through-hole.

[0025] In such an air amplifier having the function of amplifying an air flow, the first through-hole has a horn-shaped portion in the first body, wherein the end of the horn-shaped portion of the first through-hole with a larger diameter is arranged at the end of the inner sleeve on the side of the first body and functions as a suction port.

[0026] In such an air amplifier having the function of amplifying an air flow, the inner sleeve is provided with a shoulder perpendicular to the second body at the connecting portion between the first and second bodies, the shoulder of which abuts against the end surface of the outer sleeve on the side of the third body.

[0027] In an air amplifier, which has the function of amplifying an air flow, the inner sleeve has a T-shaped cross-section.

[0028] The following advantageous effects are achieved with the present invention: It is made of a special material and can thus be used at temperatures of 800°C - 1000°C. A small amount of compressed air is introduced to blow out a large amount of air, thereby increasing the airflow. Due to the interference fit in the second through-hole at the connecting portion of the outer sleeve with the chamfer, the compressed air is blown out only along the slit-shaped gaps. It operates reliably without any moving parts and noise. In addition, only an effective filter device needs to be added without any maintenance, and the air output is adjusted by the air supply, resulting in no electrical interference and low cost. Fig. 1 shows a sectional view of an air amplifier according to an embodiment of the invention. Fig. 2 shows a sectional view of an inner sleeve. Fig. 3 shows a sectional view of an outer sleeve. Fig. 4 shows an enlarged partial view of Fig. 2. Fig. 5 shows a side view of a second body.

[0029] With regard to the technical means used in the present invention to achieve the above-mentioned object and advantageous effects, preferred and possible embodiments are now listed and described in detail in conjunction with the figures as follows: As in Fig. 1 to 5 are respectively a cross-sectional view of the air amplifier according to this invention, a cross-sectional view of an inner sleeve, a cross-sectional view of an outer sleeve, a detailed enlarged view of Fig.2 and a side view of the second body. The air amplifier according to this invention, which has a function of amplifying an air flow, comprises an inner sleeve 1 and an outer sleeve 2.

[0030] The inner sleeve 1 is substantially T-shaped in cross-sectional view and is integrally formed by a first body 11 having a larger diameter and a second body 12 having a smaller diameter. At the connecting portion between the first body 11 and the second body 12, the inner sleeve 1 has a shoulder 111 arranged perpendicular to the second body 12a. In addition, a first through-hole 112 is formed through the inner sleeve 1. The first through-hole may be a straight hole or may have a horn shape in a partial portion. When the first through-hole 112 is in the form of a straight hole, the portion of the first through-hole 112 arranged in the first body 11 functions as a suction port (not shown).In a preferred embodiment of the present invention, the portion of the first through-hole 112 disposed in the first body 11 is horn-shaped, and the end of the horn-shaped portion in the first through-hole 112 with a larger diameter is disposed at the end of the inner sleeve 1 on the side of the first body 11. The horn-shaped portion of the first through-hole 112 functions as a suction port f.

[0031] The outer sleeve 2 is integrally formed by a third body 21 having a larger diameter and a fourth body 22 having a smaller diameter. A second through-hole 23 is formed through the outer sleeve 2. The portion of the second through-hole located in the fourth body 22 is horn-shaped. The end of the horn-shaped portion in the second through-hole 23 having a larger diameter is located at the end of the outer sleeve 2 on the side of the fourth body 22. The horn-shaped portion of the second through-hole 23 serves as an outlet port e.

[0032] The outer diameter of the second body 12 corresponds to the inner diameter of the second through hole 23 within a portion of the third body 21. During assembly, the second body 12 is inserted into the second through hole 23, and the shoulder 111 of the inner sleeve 1 abuts against the end surface of the outer sleeve 2 on the side of the third body 21.

[0033] A groove 13 is provided annularly in a peripheral direction on the second body 12 of the inner sleeve 1. Corresponding to the groove, an annular cavity b is provided circumferentially in the portion of the second through-hole 23 arranged on the fourth body 22. When the inner sleeve 1 and the outer sleeve 2 are joined together, the groove 13 and the annular cavity b are arranged accordingly to jointly form a chamber, thereby avoiding adverse effects caused by expansion at higher temperatures and contraction at lower temperatures or by assembly errors. Furthermore, a compressed air inlet a is provided in the radial direction on the third body 21 in the outer sleeve 2, which does not pass through the third body 21 but communicates with the annular cavity b.

[0034] A chamfer 121 is provided at the end of the inner sleeve 1 on the side of the second body 12, with a plurality of slit-shaped gaps c spaced from each other circumferentially distributed on the chamfer 121. A conical surface 231 is provided on the outer sleeve 2 at the contact portion with the chamfer 121 in the second through-hole 23. The chamfer 121 is press-fitted g with the conical surface 231. Further, the conical surface 231 protrudes toward the axis of the second through-hole 23 at the connecting portion with the end of the horn-shaped portion in the second through-hole 23 having the smaller diameter to generate the Coandă effect.

[0035] In operation, compressed air is fed into the annular cavity b through the compressed air inlet a and then flows out at high speed through the slit-like gaps c, so that a vacuum region d is formed at the end of the horn-shaped portion in the second through-hole 23 with the smaller diameter. A large amount of ambient air is sucked in through the suction port f, which mixes with the compressed air to form a gas mixture, and is sprayed out in a ring shape around the outlet port e. Thus, the purpose is achieved by discharging a large amount of air with a small amount of compressed air consumed.

[0036] The air amplifier according to this invention is made of a special material and can be used at a temperature of 800 °C - 1000 °C, wherein a large amount of air is sprayed when a small amount of compressed air is supplied, so that the air flow is increased, and the compressed air can be sprayed only along the slit-shaped gaps c due to the press fit g at the connecting portion of the chamfer 121 with the outer sleeve 2 in the second through hole 23.

[0037] In summary, the invention relates to passing an air stream through the amplifier. Using a small amount of industrial compressed air supplied as the power source, a vacuum zone is formed at the outlet end of the air amplifier. This allows the air to be drawn in at the amplifier's inlet, mix with the compressed air at the outlet, and flow through the special structure, forming a uniform conical air stream ring during spraying. Thus, using a small amount of compressed air, a large amount of ambient air is expelled, effectively reducing compressed air consumption.

[0038] The present invention brings about the following advantages: 1. No moving parts are provided, and it works safely and reliably; 2. It works silently; 3. Only an effective filter device needs to be added without any maintenance; 4. The output airflow is adjusted by the incoming airflow without electrical interference; 5. Costs are reduced. List of reference symbols 1 inner sleeve 11 first body 111 Shoulder 112 first through hole 12 second body 121 chamfer 13 grooves 2 outer sleeve 21 third body 22 fourth body 23 second through hole 231 conical surface a compressed air inlet b annular cavity c slit-shaped gap d vacuum area e outlet opening f suction opening g Press fit

Claims

[1] Air amplifier having a function of amplifying an air flow, characterized in that it comprises an inner sleeve (1) and an outer sleeve (2), wherein the inner sleeve (1) is formed integrally by a first body (11) having a larger diameter and a second body (12) having a smaller diameter, wherein a first through hole (112) is formed through the first body (11) as a straight hole, a portion of which in the first body (11) functions as a suction opening (f), wherein the first through-hole (112) has a horn-shaped portion in the first body (11), wherein an end of the horn-shaped portion of the first through-hole (112) having a larger diameter is arranged at the end of the inner sleeve (1) on the side of the first body (11) and functions as a suction port (f); wherein the outer sleeve (2) is formed integrally by a third body (21) having a larger diameter and a fourth body (22) having a smaller diameter, wherein a second through-hole (23) is formed in the outer sleeve (2), a portion of which in the fourth body (22) has a horn shape, wherein one end of the horn-shaped portion of the second through-hole (23) having a larger diameter is arranged at the end of the outer sleeve (2) on the side of the fourth body (22) and functions as an outlet opening (e); wherein an outer diameter of the second body (12) corresponds to an inner diameter of a portion of the second through-hole (23) in the third body (21), and the second body (12) is inserted into the second through-hole (23); wherein a groove (13) is provided annularly in the circumferential direction on the second body (12) of the inner sleeve (1), and the second through-hole (23) is provided with an annular cavity (b) extending circumferentially in the portion of the fourth body (22), wherein the groove (13) and the annular cavity (b) are arranged accordingly to jointly form a chamber, and a compressed air inlet (a) is provided in the radial direction on the third body (21) of the outer sleeve (2), wherein the inlet does not penetrate through the third body (21) in the radial direction but communicates with the annular cavity (b); wherein a chamfer (121) is formed at the end of the inner sleeve (1) on the side of the second body (12), on the chamfer (121) a plurality of slit-shaped gaps (c) are distributed at a distance from each other in the circumferential direction, and a conical surface is provided on the outer sleeve (2) in the second through-hole at the contact portion with the chamfer (121), the conical surface being in press fit (g) with the chamfer (121); wherein the conical surface at the connecting portion with the end of the horn-shaped portion of the second through-hole (23) having the smaller diameter projects toward the axis of the second through-hole (23). [2] An air amplifier having the function of amplifying an air flow according to claim 1, characterized in that the inner sleeve (1) is provided with a shoulder perpendicular to the second body (12) at the connecting portion between the first and second bodies, the shoulder abutting against the end surface of the outer sleeve (2) on the side of the third body (21). [3] An air amplifier having the function of amplifying an air flow according to claim 1, characterized in that the inner sleeve (1) has a T-shaped cross section.

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