JP6500215B2 - Air blower - Google Patents

Description

  The present invention relates to, for example, a blower that provides a refreshing feeling or encourages air circulation in a space by blowing air.

  Conventionally, this type of blower includes an impeller and a motor enclosed in a base serving as a base, and air is circulated in a manner such that it blows out horizontally from the ring-shaped blower provided at the upper portion of the base. And the domestic | home-use air blower which produces the flow of air is known (for example, refer patent document 1).

  Hereinafter, the air blower will be described with reference to FIGS. 11 and 12.

  FIG. 11 shows a projection of the fan assembly 100 as viewed from the front thereof, and FIG. 12 shows a cross-sectional projection of the fan assembly 100. As shown in FIG. Blower assembly 100 has an annular nozzle 101 defining a central opening 102. A motor 122 for generating an air flow through the annular nozzle 101 is disposed within the base 116 with the motor housing 126. Further, an impeller (impeller) 130 is connected to a rotating shaft extending outward from the motor 122, and a diffuser 132 is positioned downstream of the impeller 130. The motor 122 is connected to the electrical connection and the power supply, and a plurality of selection buttons 120 allow the user to operate the fan assembly 100.

With the above configuration, the above-described fan assembly 100 operates as follows.
The user appropriately selects one of the plurality of selection buttons 120 to drive the motor 122. Thus, the motor 122 is activated and air is drawn into the fan assembly 100 via the air inlet 124. Air flows through the outer casing 118 to the inlet 134 of the impeller 130. The air flow leaving the outlet 136 of the diffuser 132 and the exhaust of the impeller 130 is split into two air flows which travel in opposite directions through the internal passage 110.

  The air flow is squeezed as it enters port 112 and is further throttled at the outlet 144 of port 112. This throttling creates pressure in the system.

  The air flow so created overcomes the pressure generated by the throttling, and the air flow exits through outlet 144 as a primary air flow. The primary air flow is directed towards the user in a focused or focused manner by the arrangement of the guide portion 148. The secondary air flow is caused by the entrainment of air from the external environment, in particular the area around the outlet 144 and the outer edge of the annular nozzle 101. This secondary air flow passes through the central opening 102 where it mixes with the primary air flow to create a total air flow that is expelled forward from the fan assembly 100.

JP, 2010-077969, A

  In such a conventional air blower, when the area of the central opening 102 is reduced, a sufficient amount of induced air flow can not be obtained, and the negative pressure in the upstream region of the secondary air flow around the outlet 144 becomes strong. As a result, the primary air flow discharged from the outlet 144 flows back toward the same area, and the flow rate of the primary air flow is reduced. Accordingly, the generation of secondary air flow caused by entrainment of the primary air flow is also suppressed. As a result, there is a problem that the user can not enjoy a sufficient amount of air.

  Then, this invention solves the said conventional subject, and it aims at providing the air blower which can obtain sufficient air volume even when it is miniaturized.

  According to the present invention, a suction port for taking in air, high pressure air generating means for generating high pressure air by compressing air taken from the suction port, a blowout port for blowing out the high pressure air, the suction port and the high pressure air A first air passage communicating between the generating means and the outlet, a plurality of induced air inlets which are attracted by the air blown out from the outlet and which sucks the air, and air taken in from the plurality of induced air inlets And an induction air outlet for blowing out the air mixed in the induction air mixing portion, the induction air suction opening, the induction air mixing portion, and the induction air outlet. It is a blower comprising a second air passage, an inner air outlet for blowing out the high pressure air inside the air outlet, and a third air passage for connecting the high pressure air generating means and the inner air outlet. To achieve the intended purpose It is.

  According to the present invention, it is possible to provide a blower that can obtain a sufficient amount of air even when the size is reduced.

The perspective view which shows the air blower of Embodiment 1 of this invention. The top view which shows the air blower of Embodiment 1 of this invention Sectional drawing which shows the air blower of Embodiment 1 of this invention. (A) the side flow schematic diagram of the outlet air of the air outlet is blower If no, the flow schematic diagram of the outlet air of the blower device when there is (b) in the side outlet The perspective view which shows the air blower in the state which is not equipped with the cover of Embodiment 2 of this invention . The perspective view which shows the cover of Embodiment 2 of this invention Sectional drawing which shows the cover of Embodiment 2 of this invention The perspective view which shows the air blower which equipped the cover of Embodiment 2 of this invention Sectional drawing which shows the air blower which equipped the cover of Embodiment 2 of this invention Sectional drawing which shows the modification of the air blower of this invention Front view showing an example of the prior art Sectional view showing an example of the prior art

  The air blower according to the present invention comprises: a suction port for taking in air; high pressure air generating means for compressing high pressure air by compressing the air taken in from the suction port; a blowout port for blowing out the high pressure air; A first air passage communicating between the high-pressure air generating means and the air outlet, a plurality of induction air inlets which are attracted by air blown out from the air outlet, and a plurality of induction air inlets An induction air mixing unit for mixing the sucked air, an induction air outlet for blowing out the air mixed in the induction air mixing unit, the induction air suction port, the induction air mixing unit, and the induction air outlet A second air passage communicating with the inner air outlet, an inner air outlet blowing out the high pressure air inside the air outlet, and a third air passage connecting the high pressure air generating means and the inner air outlet. It is a blower.

Thus, when the area of the attraction air inlet becomes smaller due to the influence of such change in the shape of size and attract air inlet of the blower, it is possible to obtain a sufficient air volume.

  Moreover, the air blower which concerns on this invention may be equipped with the said induced air blower outlet inside the said blower outlet, and may be equipped with the said inner blower outlet inside the said induced air blower outlet. As a result, it is possible to obtain a larger amount of air because the induced air flow is generated efficiently and the vortex area is suppressed.

  Further, in the air blower according to the present invention, the inner air outlet may be a slit provided at the top of the pedestal raised toward the induction air mixing portion and provided around the top. As a result, in order to generate the induced air flow efficiently, it is possible to obtain more air flow.

  In the air blower according to the present invention, the blowing direction of the high pressure air from the inner blowout port may be inclined in the center direction of the top with respect to the blowout port plane constituting the blowout port. As a result, in order to suppress the vortex area to a narrower range, it is possible to obtain more air volume.

  In the air blower according to the present invention, the blowing direction of high-pressure air from the inner blowout port may be inclined in the outer circumferential direction of the top with respect to a blowout port plane constituting the blowout port. This makes it possible to lift the induction air and the high-pressure air in the blowing direction, so that it is possible to obtain a larger amount of air.

  Moreover, the air blower concerning this invention may be equipped with the said inner blower outlet on the blower outlet plane which comprises the said blower outlet. This makes it possible to lift the induction air and the high-pressure air further downstream in the blowing direction, so it is possible to obtain a larger air volume.

  Moreover, the air blower which concerns on this invention may be equipped with the adjustment means which adjusts the flow volume of the high pressure air which blows off from said inner side blower outlet. This allows the user to easily change the nature of the blowing air.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention. Moreover, the same reference numerals are given to the same parts throughout the drawings, and the description is omitted. Furthermore, in the drawings, the description of the details of each part not directly related to the present invention is omitted.

Embodiment 1
Hereinafter, the configuration of the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

  FIG. 1 is a perspective view of the blower 11, and FIG. 2 is a top view of the blower 11.

  As shown in FIG. 1 and FIG. 2, the blower 11 is composed of a cylindrical case 1, a sub case 2 and a pedestal 18.

  The housing 1 is provided with a blowout port 13, an induction air suction port 14, an induction air mixing unit 15, and an induction air blowout port 16.

  The blower outlet 13 is provided on the top surface side of the cylindrical case 1 along the periphery of the top surface in the form of an annular slit. Moreover, the blowing direction of the air by the blower outlet 13 is a direction parallel to the central axis which connects two discs which comprise cylindrical shape.

  The induction air suction ports 14 are six substantially rectangular openings provided adjacent to the side surface of the housing 1 of the blower 11.

  The induction air mixing unit 15 is a region for mixing the air flowing in from the plurality of induction air suction ports 14 in communication, and is provided in the internal space of the housing 1 as a cylindrical space.

  The induction air outlet 16 is provided inside the circular top surface of the outlet 13. Here, the inner side means the center side of the blowout port 13 on the basis of the outer peripheral edge in the plane constituting the blowout port 13. That is, the induction air outlet 16 is provided with the outlet 13 on the outer periphery thereof. The induction air outlet 16 is in communication with the induction air mixing section 15. As a result, the induction air suction port 14, the induction air mixing section 15, and the induction air opening 16 are communicated in this order.

The sub-housing 2 has a cylindrical shape with a diameter smaller than that of the housing 1, and the top surface thereof is connected to the bottom of the housing 1 and has a hollow shape in which the suction port 12 is provided on the side surface portion . The suction port 12 is configured by a plurality of slit-shaped openings of the same shape adjacent to each other in the circumferential direction and the central axis direction of the sub housing 2.

Pedestal portion 18 is formed in a cylindrical shape and raised toward the attraction air mixing portion 15 from the bottom surface of the housing 1 (the top surface of the sub-housing 2). At the top of the pedestal portion 18 on the outlet 13 side, an inner outlet 17 formed as four slits around the periphery of the top is provided. The diameter of the top of the pedestal 18 is smaller than the diameter of the top surface of the housing 1, that is, the inner outlet 17 provided at the top is located inside the outlet 13. Continued There is a description of the internal structure of the blower 11. FIG. 3 is a cross-sectional view of the blower 11.

  As shown in FIG. 3, high pressure air generating means 19 is provided on the bottom side of the housing 1. The high pressure air generating means 19 comprises an impeller 20 and a motor 21 connected to the impeller 20. The motor 21 is provided in the internal cavity of the pedestal 18, and the impeller 20 is provided on the side of the sub housing 2 with respect to the motor 21, that is, on the opposite side to the air blowing direction described later.

  An opening 50 communicating with the suction port 12 is provided on the further sub-housing 2 side of the impeller 20, and the high-pressure air generating means 19 operates the motor 21 to rotate the impeller 20, whereby suction is performed. The air taken in from the port 12 through the opening 50 is compressed to generate high pressure air 22.

Further, as shown in FIG. 3, the blower 11 is provided with three air passages of a first air passage, a second air passage, and a third air passage. The first air passage is an air passage communicating from the suction port 12 to the blowout port 13 via the impeller 20. That is, in FIG. 3, it is an air path which shows the flow of the high pressure air 22, Comprising: The part in the air blower 11 becomes a 1st air path.

  The second air passage is an air passage communicating from the induction air suction port 14 to the induction air outlet 16 via the induction air mixing unit 15. The induction air 23 is induced by the high pressure air 22 discharged from the outlet 13 and is taken into the blower 11 from the induction air inlet 14. Then, the induction air 23 flows through the second air path and is discharged from the induction air outlet 16. That is, in FIG. 3, it is an air path which shows the flow of the induction air 23, Comprising: The part in a ventilation apparatus becomes a 2nd air path.

  The third air passage is an air passage communicating from the rear surface (the surface on the air outlet 13 side) of the impeller 20 to the inner air outlet 17 via the side surface of the motor 21.

  The high pressure branch air 24 is an air branched from the high pressure air 22 at the outlet of the impeller 20, flows through the third air passage and is discharged from the inner air outlet 17. That is, in FIG. 3, it is an air path which shows the flow of the high pressure branch air 24, and the part in the air blower 11 becomes a 3rd air path.

  The above is the structure of the main part of the air blower 11.

  Subsequently, operations of the respective units at the time of operation of the blower 11 will be described with reference to FIG.

  By supplying power to the motor 21, the rotation shaft of the motor 21 is rotated. Power supply is performed, for example, from an outlet connected to the end of a power cord (not shown) or by a built-in battery.

  When the rotation shaft of the motor 21 rotates, the impeller 20 connected to the rotation shaft rotates. When the impeller 20 rotates, air inside or around the impeller 20 becomes high-pressure air and is discharged from the rotation center of the impeller 20 toward the outer periphery. The discharged high pressure air is blown out of the outlet 13 from the outer periphery of the impeller 20 through the internal space of the housing 1. When air is blown out from the blowout port 13, the internal space of the sub housing 2 is decompressed, and as a result, air outside the blower 11 is sucked into the blower 11 from the suction port 12. Thus, a flow of high pressure air 22 through the first air passage is continuously generated.

  The high pressure air 22 is mainly discharged from the blowout port 13 to the outside of the blower 11, but a part thereof passes through the third air path branched from the vicinity of the outer periphery of the impeller 20 and It also blows off from the outlet 17. The blow-off direction of the high-pressure branch air 24 blown out from the inner blow-out port 17 is the same as the high-pressure air 22.

  When the high pressure air 22 and the high pressure branch air 24 are blown out, they are attracted by the two airs to generate the attraction air 23. The generated induction air 23 is sucked from the induction air suction port 14, and the induction air 23 sucked from the induction air suction port 14 mainly adjacent to the induction air mixing unit 15 is mixed.

  The mixed induction air 23 is discharged in substantially the same direction as the high pressure air 22 and the high pressure branch air 24.

  The above is the operation of the blower 11.

Subsequently, the role of the inner air outlet 17 will be mainly described with reference to FIG. 4. 4 (a) is a schematic view of the flow of the blown air of the blower when there is no inner blowout, and FIG. 4 (b) is a schematic view of the flow of the blow of the blower 11 with the inner blowout.

  Here, as the area of the induction air suction port 14 is smaller, the resistance to induction of induction wind into the second air path increases, so a strong negative pressure region in the second air path and the downstream region of the second air path Is formed. Then, as shown in FIG. 4A, when there is no inner blowout port, the high pressure air 22a is rapidly deviated toward the negative pressure region, that is, toward the top surface center of the housing 1. A part of the high pressure air 22 b which has drifted is retained in the negative pressure region, that is, forms the vortex region 25. In the vortex area 25, since a flow of lubricated air is not generated, the amount of inflow of the induced air 23 into the induced air suction port 14 is also suppressed. As a result, the air volume of both the high pressure air 22 and the induction air 23 decreases, and the user can not enjoy a sufficient air volume. Furthermore, the air flow range is narrowed because the air flow is deviated toward the center of the top surface of the housing 1.

  On the other hand, the air blower 11 shown above is provided with the inner blower outlet 17. For this reason, as shown in FIG. 4 (b), the high pressure branched air 24 discharged from the inner air outlet 17 through the third air passage is generated in the second air passage and the downstream region of the second air passage. The vortex area 25 is suppressed. Specifically, the high-pressure branch air 24 lifts the high-pressure air 22b, which is retained in the negative pressure region described in FIG. 4A, in the blowing direction. As a result, the high pressure air 22a shown in FIG. 4A becomes substantially parallel to the blowout direction at the blowout port 13 like the high pressure air 22d shown in FIG. 4B. As a result, as shown in FIG. 4 (b), the vortex area 25 becomes much smaller than in FIG. 4 (a). And, by reducing the negative pressure in the vortex region 25, it is possible to suppress the partial flow of the high pressure air 22 (synthesized wind of the high pressure air 22c and the high pressure air 22d). At the same time, the amount of inflow of the induction air 23 to the induction air suction port 14 is increased, and the induction air 23 can be generated efficiently. As a result, it is possible to realize a blowing air having a sufficient air volume over a wide range.

  Further, in the present embodiment, although the high pressure branch air 24 passes through the side surface of the motor 21, the high pressure branch air 24 strikes the side surface of the motor 21, and the heat of the motor 21 is discharged from the inner outlet 17. Thus, the temperature rise of the motor 21 can be suppressed. As a result, it is possible to suppress the performance deterioration of the motor 21 due to the temperature rise under long-term use of the blower 11, that is, the reduction of the blower performance as a whole of the blower 11. That is, it is desirable that the third air passage pass through a part of the motor 21, that is, to contact the motor 21.

  Further, in the present embodiment, the leak flow of the impeller 20 flowing on the back surface of the impeller 20 is utilized as the high pressure branch air 24, but the method of generating the high pressure branch air 24 is not particularly limited. However, it is possible to adjust the leak flow of the impeller 20, that is, the air volume of the high-pressure branch air 24, by adjusting the gap between the back surface of the impeller 20 and the blower 11 by this. It can be easy.

  Further, in the present embodiment, the pedestal portion 18 raised toward the induction air mixing portion 15 is provided, and the motor 21 is provided in the pedestal portion 18, whereby the distance from the outlet of the impeller 20 to the air outlet 13 Is shortened. As a result, it is possible to reduce the thickness in the blowing direction of the blower 11, that is, to miniaturize it. At the same time, since the impeller 20 can be used under a low pressure by suppressing the pressure loss in the first air passage, the power consumption of the blower 11 can be reduced, that is, the energy saving property can be enhanced. Can. However, the presence or absence of the pedestal portion 18 and the positions of the motor 21 and the impeller 20 are not limited.

  Further, in the present embodiment, four slit-like inner blowout openings 17 are provided on the top of the pedestal 18 and on the outer peripheral side of the top. The shape of the inner air outlet 17 is not particularly specified, but the higher the location provided is on the outer peripheral side of the pedestal 18, the larger the effect of lifting the high pressure air 22 in the blowing direction, and the air volume of the induction air 23 is increased with a small air volume. be able to.

  Further, in the present embodiment, the housing 1, the sub housing 2, and the pedestal 18 are formed in a cylindrical shape, but the shapes of the housing 1, sub housing 2, and pedestal 18 are not particularly limited.

  Further, in the present embodiment, a plurality of suction ports 12 are provided in the same shape in a slit shape, but if a sufficient suction air amount is secured, the area, shape and number of suction ports 12 are particularly limited. There is not.

  Moreover, although the blower outlet 13 is provided in circular slit shape in this Embodiment, there is no restriction | limiting in particular in the shape of the blower outlet 13. FIG. However, by providing them in a ring shape, generation of efficient induction air 23 can be expected.

  Further, in the present embodiment, although the impeller 20 and the motor 21 are provided as the high pressure air generating means 19, the high pressure air generating means 19 is not particularly limited.

Second Embodiment
The details of the configuration of the second embodiment of the present invention will be described below with reference to FIGS. 5 to 9. In the second embodiment, a mechanism for adjusting the amount of air blown out from the inner air outlet 17 will be described. 5 is a perspective view of the air blower in a state where the cover is not attached, FIG. 6 and FIG. 7 are a perspective view and a sectional view of the cover respectively, and FIGS. It is a perspective view and sectional drawing of the open air blower.

  As shown in FIG. 5, a ring-shaped cover stopper 26 protruding from the bottom surface (wall surface) of the blower 11 toward the induction air mixing unit 15 is provided around the pedestal 18. The cover stopper 26 has a part on the inner peripheral side cut out to be formed in the same circumferential shape as the pedestal portion 18, that is, has axial symmetry. By rotatably mounting a cover, which will be described later, on the inner periphery of the cover stopper 26, the amount of air blown from the inner air outlet 17 is adjusted.

  As shown in FIGS. 6 and 7, the cover 27 is formed of three types of wall surfaces and has a hat-like shape with axial symmetry, and a flat wall surface 28, a raised wall surface 29, a top wall surface from the outer periphery toward the center It is formed by 30. The raised wall 29 is vertically raised from the flat wall 28 and the top wall 30 is vertically connected to the raised wall 29 toward the central axis of the cover 27. Further, the top wall surface 30 is provided with a cover-side inner blower outlet 31 having the same area, shape, number and spacing on the same inner diameter as the inner blower outlet 17.

  As shown in FIG. 8 and FIG. 9, the cover 27 has an air blower such that the flat wall surface 28 is sandwiched by the cover stopper 26 and the wall surface of the air blower 11 on the same circle as the pedestal 18 and covers the pedestal 18. It is attached to 11. Since the cover 27 and the base portion 18 and the cover stopper 26 have a fixed gap, the cover 27 can be rotated, that is, can be rotated and slid on the base portion 18. It is possible to adjust the rate of communication with the cover side inner outlet 31. Here, the communication ratio indicates the ratio of the area in which the inner air outlet 17 and the cover-side inner air outlet 31 overlap when the opening area of the inner air outlet 17 is 100. That is, in the case of the communication rate 100, the inner air outlet 17 is not blocked, and in the case of the communication rate 0, the inner air outlet 17 is completely blocked and not functioning as the inner air outlet. Become.

  In the configuration described above, when the inner outlet 17 and the cover-side inner outlet 31 completely communicate (communication rate 100), the vortex area is suppressed. That is, as in the first embodiment, as shown in FIG. 4 (b), the high pressure branched air 24 discharged from the inner air outlet 17 and the cover side inner air outlet 31 through the third air passage is the second air. As described above, the vortex area 25 generated in the downstream region of the passage and the second air passage is suppressed. As a result, it is possible to realize a blowing air having a sufficient air volume over a wide range.

  On the other hand, the pressure loss of the third air passage increases as the communication ratio between the inner air outlet 17 and the cover-side inner air outlet 31 decreases, and the inner air outlet 17 and the cover pass through the third air passage. The flow rate of the high pressure branch air 24 discharged from the side inner blowout port 31 decreases. As a result, the vortex region 25 is formed in the second air passage and the downstream region of the second air passage, and the high pressure air 22 is also pulled by the vortex region 25 and gathered in the central axis direction of the blower 11 to flow downstream. As a result, it becomes the blowing wind which raised the flow velocity.

  That is, by the user rotating the cover 27 to adjust the communication ratio between the inner air outlet 17 and the cover-side inner air outlet 31, it becomes possible to easily change the nature of the blowing air.

  In the present embodiment, the shapes of the pedestal portion 18 and the cover 27 are limited, but any shape may be used as long as the flow rate of the air blown out from the inner air outlet 17 can be adjusted.

  Further, in the present embodiment, the cover 27 is provided to be manually rotated, but the movable range and movable method of the cover 27 are not particularly specified.

(Modification)
The modification of the said Embodiment 1 and 2 is demonstrated with FIG.

  In the above embodiment, the blowout direction of the high-pressure branch air 24 from the inner blowout port 17 is set parallel to the central axis of the blower 11, but as shown in FIG. 10A, the inner blowout port 17x is May be inclined in the direction of the center of the top of the pedestal 18 with respect to the plane of the air outlet forming the air outlet 13.

  As a result, by suppressing the vortex area 25 to a narrower range, it is possible to obtain more air volume.

  Further, as shown in FIG. 10 (b), the blowout direction of the high-pressure branch air 24 from the inner blowout port 17y may be inclined in the outer peripheral direction of the top with respect to the blowout port plane constituting the blowout port 13. . As a result, the high pressure branch air 24 further lifts the induction air 23 in the air blowing direction, and along with that, the induction air 23 also lifts the high pressure air 22 in the air blowing direction, so it is possible to obtain more air volume. It becomes.

  Further, in the above embodiment, the inner air outlet 17 is provided on the upstream side of the air outlet plane that constitutes the air outlet 13, but as shown in FIG. It may be provided on the outlet plane that constitutes the As a result, the high pressure branch air 24 can lift the induced air 23 further downstream in the blowing direction, and the induced air 23 can also lift the high pressure air 22 further downstream in the blowing direction. In addition to that, it is possible to obtain more air volume by shortening the distance of the high pressure branch air 24 to the user.

  The blower according to the present invention makes it possible to provide a blower capable of obtaining a sufficient air flow even when the size of the blower is reduced.

Reference Signs List 1 housing 2 auxiliary housing 11 air blower 12 suction port 13 outlet 14 induction air inlet 15 induction air mixing unit 16 induction air outlet 17 inner air outlet 18 pedestal portion 19 high pressure air generating means 20 impeller 21 motor 22 high pressure Air 23 Induction air 24 High pressure branch air 25 Vortex region 26 Cover stopper 27 Cover 28 Flat wall 29 Raised wall 30 Top wall 31 Cover side inner outlet

Claims (6)

A suction inlet for taking in air,
High pressure air generating means for compressing the air taken in from the suction port to generate high pressure air;
An outlet for blowing out the high pressure air;
A first air passage communicating the suction port, the high pressure air generating means, and the blowout port;
A plurality of induction air inlets which are attracted by the air blown out from the outlet and suck in the air;
An induction air mixing unit for mixing the air drawn from the plurality of induction air suction ports;
An induction air outlet for blowing out the air mixed in the induction air mixing unit inside the air outlet;
A second air passage which penetrates the first air passage and communicates the induction air suction port, the induction air mixing unit, and the induction air outlet;
An inner outlet for blowing out the high pressure air inside the induced air outlet ;
A third air passage communicating the high pressure air generating means with the inner air outlet ;
And a pedestal portion having a side surface at a position opposite to the induction air suction port and protruding toward the induction air mixing portion,
The air blower according to claim 1, wherein the inner blowout port is a slit provided at the top of the pedestal and circling at the top . 2. The air blower according to claim 1, wherein the pedestal changes the flow direction of the induction air sucked from the induction air suction port in a direction flowing along the side surface of the pedestal. 3. The air blower according to claim 1 , wherein a blowing direction of high-pressure air from the inner blowout port is inclined in a central direction of the top with respect to a blowout port plane constituting the blowout port. The air blower according to claim 1 or 2 , wherein the blowout direction of high pressure air from the inner blowout port is inclined in the outer peripheral direction of the top with respect to the blowout port plane constituting the blowout port. The air blower according to any one of claims 1 to 4 , wherein the inner air outlet is provided on an air outlet plane constituting the air outlet. The air blower according to any one of claims 1 to 5 , further comprising an adjusting means for adjusting a flow rate of high pressure air blown out from the inner outlet.

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