WO2010073665A1

WO2010073665A1 - Air amplifier, air circulation circuit

Info

Publication number: WO2010073665A1
Application number: PCT/JP2009/007187
Authority: WO
Inventors: 西本昌司
Original assignee: 東保
Priority date: 2008-12-24
Filing date: 2009-12-24
Publication date: 2010-07-01
Also published as: WO2010073662A1; WO2010073663A1; WO2010073664A1

Abstract

Disclosed is an air amplifier, wherein air intake ports are disposed at the outer circumference of a passage route, which is formed at the interior of the amplifier, and through which a main air flow passes, and further an air box is disposed to cover the circumference of the air intake ports. Secondary air is collected by forming a secondary air introduction port in the air box. The main airflow passing through the passage route produces negative pressure inside the passage route, and this negative pressure draws the secondary air inside the air box through the air intake port and into the passage route.

Description

Air amplifier, air circulation circuit

The present invention relates to an air amplifier that amplifies an air flow, and an air circulation circuit in which the air amplifier is arranged and outputs power by an air motor.

The current power used as a conventional technology is basically an internal combustion engine that generates power by burning fossil fuel. For this reason, the global environment is worsening and is regarded as a problem. In particular, there are many problems such as CO2 which has a great impact on global warming and NOX which has a great impact on human health. In addition, bioenergy research is being conducted as a solution to fossil fuel depletion, but it is far from solving the problem. Establishing an air circulation circuit makes it possible to put the power of the air motor into practical use and contribute to solving problems.

The problem to be solved is the problem of exhaustion of fossil fuel as an energy source. Various researches such as bioenergy have been conducted as alternative fuels, but they are far from solving the problem. A solution to this problem requires a change of mindset.

The above object is achieved by the following means based on the earnest research of the present inventors.

That is, the present invention that achieves the above object has a passage formed inside and through which a main air flow passes, an air suction port provided on the outer periphery of the passage, a secondary air inlet, and the air An air box that covers the periphery of the suction port and accumulates secondary air supplied to the air suction port, and the main air flow passes through the passage route so that a negative pressure is generated in the passage route. The air amplifier is configured to suck the secondary air in the air box generated by the negative pressure toward the passage route through the air suction port.

In the air amplifier according to the invention for achieving the object, a plurality of the air suction ports are provided on an outer periphery of the passage route, and the air box collectively covers the plurality of the air suction ports. .

The air amplifier of the present invention that achieves the above object is characterized in that a check valve that suppresses the outflow of air to the outside is provided in the vicinity of the secondary air inlet in the air box.

In the air amplifier of the present invention that achieves the above object, the air suction port is provided with a check valve that suppresses the outflow of air from the passage path side to the air box side.

In the air amplifier of the invention that achieves the above object, a plurality of compartments including a first chamber and a second chamber are arranged along the main air flow in the passage path, and the first chamber includes A passage hole through which the main airflow is discharged to the second chamber side is provided, and a plurality of the air suction ports are arranged on the outer periphery of the second chamber.

In the air amplifier according to the invention for achieving the above object, a plurality of auxiliary holes are provided around the passage hole of the first chamber, and the main air flow passes through the passage hole and the auxiliary hole. It is discharged to the chamber side.

In the air amplifier of the present invention that achieves the above object, the compartment is integrally formed.

In the air amplifier according to the present invention that achieves the above object, a third chamber is disposed on the downstream side of the second chamber in the passage path.

The air amplifier of the present invention that achieves the above object is characterized in that the compartments can be divided from each other.

In the air amplifier of the present invention that achieves the above object, a taper-shaped throttle portion having a path diameter that decreases in the discharge direction is provided on the discharge side of the compartment.

The air amplifier of the present invention that achieves the above object is characterized in that the air suction port of the next compartment is disposed along the outer wall of the throttle portion in the compartment.

In the air amplifier according to the invention that achieves the above object, the passage path has a tapered shape that gradually increases from the air entry side toward the air discharge side, and the air passage has an outer periphery around the taper-shaped passage path. A suction port is arranged.

The air amplifier of the present invention that achieves the above object is characterized in that a plurality of grooves are provided on the inner peripheral surface of the tapered passage path to promote swirl.

In the air amplifier of the present invention that achieves the above object, the air suction port is arranged in a plurality of stages along the path direction with respect to the tapered passage path, and the air box has the plurality of stages. It is characterized by covering the air suction ports together.

In the air amplifier of the present invention that achieves the above object, the air suction port joins at an acute angle with respect to the flow direction of the main air flow in the passage path.

The present invention that achieves the above object is an air circulation circuit for operating a power air motor, and is driven by an air tank filled with compressed air and an output of the air motor as a continuous air generating circuit. An air-driven filling compressor that fills the air tank with compressed air, and as a power air circulation circuit, a power air motor driven by air supplied from the air tank, and the power air motor A power circulation path for recirculating the discharged air to the power air motor, and the air amplifier of the present invention disposed on the power circulation path are provided.

According to the air amplifier of the present invention, the air box is arranged so as to surround the periphery of the passage route through which the main air flow passes. Therefore, for example, if a part of the exhaust air output from the air motor is increased in pressure by a blower or the like and then sent to the air box as secondary air, it efficiently joins the main air flow via the air intake port. Can be made.

Furthermore, since a reverse support valve (check valve) for preventing backflow is provided at the secondary air inlet of the air box, secondary air can be stored in the air box more efficiently. Amplification efficiency can be increased.

In addition, for example, when a plurality of air suction ports are arranged around the passage route, if the secondary air is directly connected to each air suction port, the piping becomes complicated, which increases the manufacturing cost and deteriorates the maintenance efficiency. It is easy to do. Therefore, in the present invention, a plurality of air suction ports are collectively covered with a sealed air box. As a result, if the secondary air is stored in the air box, the secondary air can be introduced into the passage route from the plurality of air suction ports without separately installing piping. As a result, complicated piping can be omitted, and the circuit can be simplified.
Further, according to the air circulation circuit of the present invention, it is possible to simplify the piping by using the air amplifier. In the air circulation circuit of the present invention, it is preferable to further provide a blower on the discharge side of the power air motor, and use the air amplified by this blower as the secondary air of the air amplification circuit. At this time, it is preferable to provide a filter filter for secondary air immediately before the blower, and it is preferable to provide an expansion silencer for reducing noise by expanding gas immediately before the blower.

According to the air amplifier of the present invention, simplification of piping can be realized by arranging an air box on the secondary air supply side.

1 is a perspective view of a two-stage air amplifier according to a first embodiment of the present invention. It is a side view and a front sectional view of the two-stage integrated air amplifier. It is a perspective view of an air amplifier with three steps according to the second embodiment. It is a side view and a front sectional view of a two-stage divided air amplifier according to a third embodiment. It is front sectional drawing of the taper-shaped air amplifier which concerns on 4th Embodiment. It is front sectional drawing of the taper-shaped air amplifier which concerns on the other structural example of 4th Embodiment. It is front sectional drawing of the air amplifier with a spiral shape and spiral groove which concerns on the other structural example of 4th Embodiment. It is explanatory drawing which showed the air circulation circuit which concerns on 5th Embodiment of this invention. It is a 1st flowchart which shows the operation state figure of the air circulation circuit. It is a 2nd flowchart which shows the operation state figure of the air circulation circuit. It is a figure of the air regulator and blower used for the air circulation circuit. It is a figure of the compressor with a clutch used for the air circulation circuit. It is a figure of the air drive type filling compressor used for the air circulation circuit.

First, the

air amplifiers

101, 201, 301, 401 according to the first to fourth embodiments of the present invention will be described. These air amplifiers have a structure in which air, compressed air, gas, or the like is efficiently sucked and merged with the main air flow by a plurality of air suction ports provided on the outer periphery of the air amplifier to amplify the air. ing.

1 and 2 show an air amplifier 101 according to the first embodiment. The amplifier 101 includes a passage path 110 that is formed inside and through which a main air flow passes, and an air box 130 that covers the outer periphery of the passage path 110 in a sealed state.

In the passage path 110, a first chamber 112, a second chamber 114, and a third chamber 116 serving as branch chambers are arranged along the main air flow. Each

compartment

112, 114, 116 is constituted by cylindrical

outer walls

112A, 114A, 116A. In the first chamber 112, a passage hole 112B for discharging air to the second chamber 114 side is formed. In the second chamber 114, a passage hole 114B for discharging air to the third chamber 116 side is formed. In the third chamber 116, a passage hole 116B for discharging air to the outside is formed. The first chamber 112, the second chamber 114, and the third chamber 116 are integrally molded as a whole.

Further, the inner diameter d2 of the second chamber 114 is larger than the inner diameter d1 of the first chamber 112. Furthermore, the inner diameter d3 of the third chamber 116 is larger than the inner diameter d2 of the second chamber 114. Thus, amplification efficiency is increased by increasing the inner diameter of the compartment toward the downstream side. In addition, air suction from the outside is realized in a rational shape by arranging an air suction port described later by using this step.

Further, the inner diameter of the passage hole 114B in the second chamber 114 is set larger than the inner diameter d4 of the passage hole 112B in the first chamber 112, and the third inner diameter is larger than the inner diameter of the passage hole 114B in the second chamber 114. The inner diameter of the passage hole 116B in the chamber 116 (this coincides with the inner diameter d3 of the third chamber 116) is set large.

A tapered throttle portion 112C having a path diameter that decreases in the discharge direction is provided on the discharge side in the first chamber 112. Therefore, the passage hole 112B is disposed at the protruding end of the throttle portion 112C. Similarly, on the discharge side in the second chamber 114, a tapered throttle portion 114C having a path diameter that decreases in the discharge direction is provided. Therefore, the passage hole 114B is disposed at the protruding end of the throttle portion 114C. By these throttle parts 112C and 114C, the flow velocity of air is increased and the generation efficiency of internal negative pressure is increased. The third chamber 116 is not formed with a throttle portion. This is because it is not necessary to generate a negative pressure on the downstream side.

A plurality of air suction ports are arranged on the outer periphery of the passage route 110. Specifically, in the vicinity of the boundary with the first chamber 112 on the outer periphery of the second chamber 114, four air suction ports 114D for the second chamber are arranged at intervals of 90 degrees in the circumferential direction. In addition, four third chamber air suction ports 116D are arranged at intervals of 90 degrees in the circumferential direction near the boundary with the second chamber 114 on the outer periphery of the third chamber 116. When the main air flow passes through the passage path 110, the pressure in the second chamber 114 becomes negative, air is sucked from the second chamber air suction port 114D, and merges with the passage path 110. Similarly, when the main airflow passes through the passage path 110, the pressure in the third chamber 116 becomes negative, air is sucked from the third chamber air suction port 116D, and merges with the passage path 110.

The air suction port 114D for the second chamber is arranged along the outer wall of the throttle portion 112C in the first chamber 112 using its tapered shape. At this time, the air suction port 114D for the second chamber joins at an acute angle α with respect to the flow direction of the main air flow in the passage path 110. Similarly, the third chamber air suction port 116 </ b> D is disposed along the outer wall of the throttle portion 114 </ b> C in the second chamber 114 using its tapered shape. At this time, the air suction port 116D for the third chamber merges with an acute angle α with respect to the flow direction of the main air flow in the passage path 110. Thus, by joining at an acute angle α, the resistance at the time of joining is reduced, and the amplification efficiency is increased.

The air box 130 is a box-shaped space that collectively covers a total of eight ports, the second chamber air suction port 114D and the third chamber air suction port 116D. The air box 130 is a sealed space by engaging with the outer peripheral wall of the passage path 110. Further, the air box 130 is formed with a secondary air inlet 132 for introducing secondary air. The secondary air introduction port 132 is provided with a check valve (check valve) 134 so that the secondary air once introduced into the air box 130 does not flow backward.

If secondary air is introduced from the outside to the secondary air introduction port 132 of the air box 130, the secondary air is accumulated in the air box 130. The secondary air is sucked in each of the second chamber air suction port 114D and the third chamber air suction port 116D and joins the main air flow. As a result, it is not necessary to separately provide the secondary inlet piping for introducing the secondary air in the second chamber air suction port 114D and the third chamber air suction port 116D, so that the circuit is greatly simplified. Things are possible.

Next, an air amplifier 201 according to the second embodiment will be described with reference to FIG. In the second embodiment, parts different from the air amplifier 101 of the first embodiment will be mainly described, and the same or similar parts will be described by matching the last two digits of the reference numerals with the first example. Illustration is omitted.

The air amplifier 201 includes a fourth chamber 218 in addition to the first chamber 212, the second chamber 214, and the third chamber 216. Although not particularly illustrated, the third chamber 216 is also formed with a narrowed portion having a tapered diameter, and air is discharged into the fourth chamber 218 from the through hole at the protruding end. A fourth chamber air suction port 218D is formed on the outer periphery of the fourth chamber 218, and sucks air to further amplify it. Thus, the amount of amplification can be increased by increasing the number of compartments on the passage route 210.

In addition, an air box 230 is disposed on the outer periphery of the first to fourth chambers 212 to 218. The air box 230 is a box-like space that covers a total of 12 ports, the second chamber air suction port 214D, the third chamber air suction port 216D, and the fourth chamber air suction port 218D. The air box 230 is a sealed space by engaging with the outer peripheral wall of the passage path 210. Although not shown, the air box 230 includes a secondary air introduction port for introducing secondary air and a check valve (check valve) disposed in the vicinity of the secondary air introduction port.

Next, an air amplifier 301 according to the third embodiment will be described with reference to FIG. In the third embodiment, portions different from the air amplifier 101 of the first embodiment will be mainly described, and the same or similar portions will be described by matching the last two digits of the reference numerals with the first example. And illustration is abbreviate | omitted.

In the air amplifier 301, the first chamber 312, the second chamber 314, and the third chamber 316 are separable. Specifically, a cylindrical engagement portion 314E is formed on the upstream side of the second chamber 314, and the first chamber 312 is inserted into the engagement portion 314E so that they can be detachably fitted to each other. It is like that. A cylindrical engaging portion 316E is also formed on the upstream side of the third chamber 316, and the second chamber 314 is inserted into the engaging portion 316E so that they can be detachably fitted to each other. As described above, the steps formed between the first chamber 312 and the third chamber 316 are effectively utilized, and are fitted in a nested manner to facilitate disassembly and assembly. As a result, maintenance is also simplified.

In addition, an air box 330 is disposed on the outer periphery of the first to third chambers 312 to 316. The air box 330 is a box-like space that covers a total of eight ports, the second chamber air suction port 314D and the third chamber air suction port 316D. The air box 330 is a sealed space by engaging with the outer peripheral wall of the passage path 310. The air box 330 includes a secondary air introduction port 332 for introducing secondary air, and a check valve (check valve) 334 disposed in the vicinity of the secondary air introduction port 332. The air box 330 can be divided. Therefore, the disassembly of the third chambers 312 to 316 from the first chamber is performed after disassembling and removing the air box 330 first.

In the air amplifier 301, a plurality of auxiliary holes 312F are further provided around the passage hole 312B of the first chamber 312. The auxiliary hole 312F can also pass air, and the main air flow is discharged to the second chamber 314 side through both the passage hole 312B and the auxiliary hole 312F. As a result, the air amplification efficiency can be increased.

Next, an air amplifier 401 according to the fourth embodiment will be described with reference to FIG. In the fourth embodiment, portions different from the air amplifier 101 of the first embodiment will be mainly described, and the same or similar portions will be described by matching the last two digits of the reference numerals with the first example. The illustration is omitted.

The air amplifier 401 has an integral structure in which the passage route 410 is not divided into compartments. A throttle portion 410A is disposed in the vicinity of the entrance of the passage route 410, and the flowed air is once throttled to increase the flow velocity. In addition, the downstream side of the narrowed portion 410A in the passage route 410 has a tapered shape that gradually increases from the air entry side toward the air discharge side. Therefore, the diameter d7 on the outlet side is larger than the diameter d6 on the inlet side. In addition, a first air suction port 410B and a second air suction port 410C are arranged on the outer periphery of the tapered passage route 410 with a certain interval in the axial direction. Note that the structure and function of the

air suction ports

410B and 410C are the same as those of the air suction port of the first example, and thus description thereof is omitted. Thus, by smoothly increasing the inner diameter of the passage route 410, the air flow resistance is reduced, and the amplification efficiency can be increased.

In addition, an air box 430 is arranged on the outer periphery so as to cover a total of eight ports of the first air suction port 410B and the second air suction port 410C. The air box 430 forms a sealed space by engaging with the outer peripheral wall of the passage path 410. The air box 430 includes a secondary air introduction port 432 for introducing secondary air, and a check valve (check valve) 434 disposed in the vicinity of the secondary air introduction port 432.

FIG. 6 shows an air amplifier 401 as another configuration example of the fourth embodiment. In the air amplifier 401, a check valve is not provided at the secondary air introduction port 432 of the air box 430. Instead, a check valve 436 is provided in each of a total of eight ports including the first air suction port 410B and the second air suction port 410C. Although the structure is somewhat complicated, the same effect can be obtained even in this way.

It should be noted that it is desirable to form a plurality of grooves 410D on the inner peripheral wall of the tapered passage passage 410 as in the other configuration example shown in FIG. The spiral groove 410D generates a swirl in the main air flow and improves amplification efficiency.

Next, an air circulation circuit according to a fifth embodiment of the present invention will be described. FIG. 8 shows an air circulation circuit according to the fifth embodiment. The air circulation circuit includes a power air circulation circuit P and a continuous air generation circuit R. Here, the operation of the air circulation circuit will be described at the same time as the description of each component configuration. 9 and 10 are flowcharts showing the operating state of the air circulation circuit.

First, the continuous air generation circuit R will be described. As preparation before starting, the preparatory compressor 1 is first started to obtain compressed air to be used for starting, and the air tank 3 is initially filled with 0.9 Mpa of compressed air using the air charge valve 2. The air tank 3 is connected to a power air circulation circuit P through an air stop valve 6. Therefore, the air stop valve 6 is opened, and the compressed air is allowed to reach each three-way valve 8 of the power air circulation circuit P. The air tank 3 is provided with an opening / closing valve 4 and a pressure gauge 5. The pressure gauge 5 functions as a pressure sensor, and can detect pressure fluctuations in the air supplied to the power air circulation circuit P.

Next, the power air circulation circuit P will be described. The entire path described below corresponds to a power circulation path for recirculating the air discharged from the power air motor 12 to the power air motor 12. First, in the power air circulation circuit P, the solenoid valve of the accelerator 11 is turned ON so that compressed air flows from the three-way valve 8. The compressed air is automatically controlled to 0.63 MPa by the air control unit 9 and passes through the first air amplifier 10-1. As the first air amplifier 10-1, those shown in the first to fourth embodiments with reference to FIGS. 1 to 7 can be used as appropriate. M1 is an air box, and is connected to a second surging tank 17 described later by a secondary flow introduction pipe N1. Accordingly, the secondary air is supplied from the second surging tank 17 to the air box M1. As a result, in the first air amplifier 10-1, the air flow rate increases about 10 times. The increase is shown in Table 1 in the state of the air amount at the air amplifier inlet and the air increase amount at the outlet. The circulating air that has accumulated energy by increasing the air drives the power air motor 12 via the accelerator 11. As a result, the power air motor 12 rotates to generate power. The power air motor 12 has a suction port S1 and a delivery port D1, and compressed air is introduced from the suction port S1 and exhausted from the delivery port D1.

The exhaust circulation air discharged from the delivery port D1 of the power air motor 12 is separated into two directions of A flow and B flow by the first flow divider 13. The exhaust circulating air in the A-flow direction is stored in the first surging tank 14 and passes through the second air amplifier 10-2 and the third air amplifier 10-3 to reach the third surging tank 18. On the other hand, the exhaust circulation air in the B flow direction reaches the air regulator 15. As shown in FIG. 11, the air regulator 15 includes an intake port 15A connected to the first flow divider 13 side, a connection port 15B connected to the intake port side of the blower 16, and an exhaust for discharging excess air. The filter 15D provided immediately before the port 15C and the exhaust port 15C is provided. In detail, the exhaust port 15C has a structure in which the outer cover 15F covers the discharge destination of the fine discharge hole 15E from which the exhaust air is discharged, so that a silencing effect can be obtained including the filtration filter 15D. It has become.

In this way, excess exhaust air is thrown away by the air regulator 15, thereby improving the efficiency of the circulation exhaust air and stabilizing the circulation circuit. The blower 16 is belt driven by a power air motor 12.

The air sent by the blower 16 is stored in the second surging tank 17, and the air box M2 provided on the outer periphery of the second air amplifier 10-2 and the third air amplifier 10-3 by the secondary flow introduction pipe N2. , M3. As the structures of the second air amplifier 10-2 and the third air amplifier 10-3, the air amplifiers shown in the first to fourth embodiments can be used as appropriate. As already described, the air in the second surging tank 17 is also supplied to the air box M1 of the first air amplifier 10-1 through the secondary flow introduction pipe N1.

On the other hand, the exhaust circulating air in the A-flow direction passes through the inside of the second air amplifier 10-2 and the third air amplifier 10-3, so that the second air amplifier 10-2 and the third air amplifier 10-3 The inside becomes negative pressure. Accordingly, the secondary air stored in the air boxes M2 and M3 is sucked and joined to the main air flow of the second air amplifier 10-2 and the third air amplifier 10-3 through an air suction port (not shown). As a result, the amount of exhaust circulating air in the second air amplifier 10-2 and the third air amplifier 10-3 increases. The increased exhaust circulation air is stored in the third surging tank 18.

The exhaust air circulating through the third surging tank 18 is supplied to one of the second flow dividers 19 divided in two directions. The other of the second flow divider 19 divided in two directions is supplied with compressed air from a second compressor (stabilized compressor) 21 provided for the purpose of stabilization provided in the continuous air generation circuit R. Therefore, in the second flow divider 19, the two airs merge and are stored in the fourth surging tank 20. The air stored in the fourth surging tank 20 returns to the other connection portion of the three-way valve 8, flows into the first air amplifier 10-1, flows into the power air motor 12, and is driven to generate power. Until the solenoid valve of the accelerator 11 is turned off, the air circulation process is repeated and the generation of power continues. The second compressor 21 is driven using the power of the power air motor 12.

Returning to the continuous air generating circuit R, a third compressor (air-driven filling compressor) 22 is connected to the air tank 3 in order to keep the internal pressure at 0.9 MPa. Thereby, the pressure is always maintained in the air tank 3. As shown in FIG. 12, the drive shaft of the third compressor 22 is connected to the power air motor 12 by a belt, and is driven by this power. Further, the third compressor 22 includes a clutch (switching means), and can connect and disconnect power according to the load state of the power air motor 12.

Specifically, in the present embodiment, a determination device (not shown) that determines the load state of the power air motor 12 is provided. According to the determination result of the determination device, when the load of the power air motor 12 is high, Control the clutch to be released so that no extra load is applied. On the other hand, when the load of the power air motor 12 is low and the output is surplus, the clutch is connected and the air tank 3 is replenished with air by the power air motor 12. Thus, the driving power of the third compressor 22 effectively uses the power of the power air motor 12.

In the above-described determination apparatus for determining the load state of the power air motor 12, if it is determined that the load is large, the clutch with the blower 16 may be released.

FIG. 13 shows the configuration of the air-driven filling compressor 22. The air-driven filling compressor 22 includes an air pump 22A, a pulley 22B attached to the input shaft 22C, an electromagnetic clutch 22D for switching connection / release of the pulley 22B and the input shaft 22C, a suction port S, and a delivery port D. . A belt is laid on the pulley 22 </ b> B and connected to the power air motor 12. By switching the electromagnetic clutch 22D, driving and stopping by the power air motor 12 are appropriately switched. Note that the same structure as the air-driven filling compressor 22 may be adopted for the second compressor 21 for stabilization. If the usage is reversed, the air-driven filling compressor 22 can be applied to the power air motor 12.

As described above, in the present embodiment, in the power air circulation circuit P, the case where the check valve 7 is arranged in the air supply path before the three-way valve 8 is shown. For example, the three-way valve 8 itself is This check valve 7 can be obtained by using the one having a function of giving priority to the one with high pressure in comparison with the compressed air sent from the air tank 3 and the air sent from the fourth surge tank 20 to the air control unit 9. It is unnecessary. On the other hand, it is also preferable to arrange a T-shaped pipe instead of the three-way valve 8 and provide the check valve 7 in each of the air supply paths. If the higher pressure is given priority in this way and the air is sent in the next direction, air circulation can be performed effectively.

According to the air amplifier of the present invention, the circuit can be simplified. For this reason, it can be used in the automobile industry / ship business-related or general industries. It is especially pollution free and can be used in a wide range of industries.

Claims

A passage route formed inside and through which the main airflow passes,
An air suction port provided on the outer periphery of the passage route;
An air box that has a secondary air inlet and covers the periphery of the air suction port to store secondary air supplied to the air suction port.
When the main airflow passes through the passage route, a negative pressure is generated in the passage route, and secondary air in the air box is directed to the passage route through the air suction port by the negative pressure. An air amplifier characterized by inhalation.
A plurality of the air suction ports are provided on the outer periphery of the passage route,
The air amplifier according to claim 1, wherein the air box covers the plurality of air suction ports together.
3. The air amplifier according to claim 1, wherein a check valve that suppresses the outflow of air to the outside is provided near the secondary air inlet in the air box.
The air amplifier according to any one of claims 1 to 3, wherein the air suction port is provided with a check valve that suppresses the outflow of air from the passage path side to the air box side.
A plurality of compartments including a first chamber and a second chamber are arranged along the main airflow in the passage route,
The first chamber is provided with a passage hole through which the main airflow is discharged to the second chamber side,
The air amplifier according to any one of claims 1 to 4, wherein a plurality of the air suction ports are arranged on an outer periphery of the second chamber.
A plurality of auxiliary holes are provided around the passage hole of the first chamber, and the main air flow is discharged to the second chamber side through the passage hole and the auxiliary hole. The air amplifier according to 5 above.
The air amplifier according to claim 5 or 6, wherein the compartment is integrally formed.
The air amplifier according to claim 5, 6 or 7, wherein a third chamber is arranged on the downstream side of the second chamber in the passage route.
The air amplifier according to any one of claims 5 to 8, wherein the compartments can be divided from each other.
10. The air amplifier according to any one of claims 5 to 9, wherein a tapered throttle portion having a path diameter that decreases in a discharge direction is provided on a discharge side in the compartment.
11. The air amplifier according to claim 10, wherein the air suction port of the next compartment is disposed along the outer wall of the throttle portion in the compartment.
The passage route has a tapered shape that gradually increases from the air entry side toward the air release side,
The air amplifier according to any one of claims 1 to 11, wherein the air suction port is disposed on an outer periphery of the tapered passage.
13. The air amplifier according to claim 12, wherein a swirl is promoted by providing a plurality of grooves on an inner peripheral surface of the tapered path.
The air suction port is arranged in a plurality of stages along the path direction with respect to the tapered path.
The air amplifier according to claim 12 or 13, wherein the air box collectively covers the air suction ports in a plurality of stages.
The air amplifier according to any one of claims 1 to 14, wherein the air suction port joins at an acute angle with respect to a flow direction of the main air flow in the passage route.
An air circulation circuit for operating a power air motor,
As a continuous air generation circuit,
An air tank filled with compressed air;
An air-driven filling compressor that is driven by the output of an air motor to fill the air tank with compressed air;
As an air circulation circuit for power,
A power air motor driven by air supplied from the air tank;
A power circulation path for recirculating the air discharged from the power air motor to the power air motor;
An air circulation circuit comprising: the air amplifier according to any one of claims 1 to 15 disposed on the power circulation path.