JP2010279586A - Air blowing device and hand drying device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air blowing device and a hand drying device using the same, restraining attenuation of intensity of high pressure air even in the case of feeding high pressure air in a wide range, so that high pressure air can be supplied in a wide range. <P>SOLUTION: In this air blowing device a11, high pressure air 12 whose jetting direction is oscillated is jetted from a plurality of static nozzles a14, b15 in the order of the fluid nozzle a14 and the fluid nozzle b15. The hand drying device uses the above device. The high pressure air 12 can be supplied in a wide range with low power consumption to achieve energy-saving hand drying or the like. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air flow blowing device and a hand drying device using the same.

  Conventionally, this type of airflow blowing device is intended to blow off dust and water droplets on the human body and clothes or products, and in order to apply high-pressure air over a wide area, it uses the Coanda effect to A method of changing the air flow direction (for example, see Patent Document 1) and a method of moving a nozzle (for example, see Patent Document 2) are known.

  Hereinafter, an example of the airflow blowing device will be described with reference to FIGS. 8 and 9.

  As shown in FIG. 7, the air flow blowing device includes a blower 101, a filter 102, and a fluid nozzle 103, and blows out air sent from the blower 101 from the fluid nozzle 103 through the filter 102. The air blown out from the fluid nozzle 103 is characterized in that the airflow direction of the blowout portion changes using the Coanda effect.

  As shown in FIG. 8, the airflow blowing device includes a gas blowing nozzle 201, a supply unit 202 that supplies high-pressure air to the gas blowing nozzle 201, and a blowing nozzle driving unit 203 that drives the gas blowing nozzle 201. It is characterized in that high pressure air is supplied over a wide range by moving the gas blowing nozzle 201 by the blowing nozzle driving means 203.

Japanese Patent No. 397971 JP 2003-235756 A

  In such a conventional air flow blowing device, although the blowing direction of high pressure air from a stationary nozzle is vibrated, when high pressure air is supplied from a single nozzle over a wide range, the vibration angle is increased or the nozzle opening is increased. When the vibration angle is widened, the distance from the target to which high pressure air is supplied increases inevitably as the distance from the nozzle center increases, and the wind speed attenuates. There was a problem that it was not possible. In addition, when the nozzle opening is increased, the air speed is reduced with the same air volume, so that the air volume must be increased, resulting in an increase in power consumption.

  Moreover, in order to move a nozzle, the mechanism and drive means for moving a nozzle are required, and there existed a subject that an apparatus will be enlarged. In addition, there has been a problem that normal movement cannot be prevented due to foreign matter coming into contact with the moving nozzle from the outside, and the function of stably supplying high-pressure air over a wide range cannot be exhibited.

  Therefore, the present invention solves the above-described conventional problems, and can stably supply high-pressure air over a wide range even when foreign matter comes into contact with the nozzle while keeping the device compact, and an energy-saving airflow It is an object of the present invention to provide a blowing device and a hand drying device using the same.

  In order to achieve this object, the present invention comprises a plurality of stationary nozzles, and from each of the stationary nozzles, high-pressure air whose oscillation direction is oscillated is blown out from each of the nozzles in order. As a result, the intended air blowout device is achieved.

  According to the present invention, an air flow outlet comprising a plurality of stationary nozzles, and high pressure air whose oscillation direction is oscillated from each of the plurality of stationary nozzles in order from each nozzle. By configuring the device, high-pressure air with a strength close to that of a single nozzle can be obtained from each nozzle even if multiple nozzles are arranged. The power consumption can be reduced by reducing the air volume while maintaining the wind speed as compared with the case where a plurality of air-conditioners are arranged. In addition, since a plurality of stationary nozzles are provided and the nozzles do not move, the function can be stably exhibited even if foreign matter comes into contact with the nozzles from the outside. Further, since the nozzle is not moved, no mechanism is required to move the nozzle, and the apparatus can be made compact. Moreover, since high-pressure air can be sent over a wide range by vibrating the blowing direction of high-pressure air, the number of nozzles can be reduced, and power consumption can be reduced by reducing the air volume while maintaining the wind speed. .

The perspective view of the airflow blowing apparatus of Embodiment 1 of this invention The enlarged view of the airflow blowing apparatus of Embodiment 1 of this invention The enlarged view of the airflow blowing apparatus of Embodiment 1 of this invention The perspective view of the airflow blowing apparatus of Embodiment 2 of this invention Schematic sectional view of the hand-drying apparatus of Embodiment 3 of the present invention The enlarged view of the airflow blowing apparatus of the hand-drying apparatus of Embodiment 3 of this invention Schematic cross-sectional view of a hand dryer according to Embodiment 4 of the present invention Sectional drawing which shows an example of a prior art Sectional drawing which shows another example of a prior art

  The air flow blowing device according to claim 1 of the present invention is provided with a plurality of stationary nozzles, and the plurality of stationary nozzles sequentially blow out high pressure air whose vibration direction is oscillated from each nozzle. It is characterized by. Thereby, since the nozzle is not moved, a mechanism is not necessary for moving the nozzle, and the apparatus can be made compact. Further, since the nozzle does not move, the function can be stably exhibited even if foreign matter comes into contact with the nozzle from the outside. In addition, even if multiple nozzles are arranged, high-pressure air with a strength close to that of a single nozzle can be obtained from each nozzle, so high-pressure air can be sent over a wide range, and when multiple nozzles are simply arranged In comparison, power consumption can be reduced by reducing the air volume while maintaining the wind speed. Moreover, since high-pressure air can be sent over a wide range by vibrating the blowing direction of high-pressure air, the number of nozzles can be reduced, and power consumption can be reduced by reducing the air volume while maintaining the wind speed. .

  The air passage includes a suction port for taking in high-pressure air and a blow-off air passage having at least one air passage branch for guiding the high-pressure air to a plurality of nozzles, and air distribution means is provided in the air passage branch, and the air passage The high-pressure air is made to flow in order by the air distributing means to the blow-off air passage branched by the branch portion, and has the same effect as in the first aspect.

  Also, the high-pressure air blown out from the nozzle is characterized by self-excited vibration, and driving means for vibrating the high-pressure air blow-out direction is unnecessary, so that it is necessary for driving. Energy is unnecessary and energy saving.

  A blowout air passage in which a nozzle is branched by an air passage branching portion; a blowout port that is substantially rectangular and expands outward; a substantially rectangular main flow path that communicates the blowout port from the blowout air passage; and the main flow A circulation air passage that branches off from one side on the long side of the path and communicates with a surface on the long side of the opposite main flow path, and circulates due to a pressure difference between both sides on the long side of the main flow path The gas in the air passage is driven, and as a result, the pressure difference is reversed, and the gas is driven again so that the high pressure air blown out from the outlet is a fluid nozzle that vibrates in the short side direction of the main flow path. It is characterized by the fact that no driving means for oscillating the blowing direction of high-pressure air is required, so that energy necessary for driving is unnecessary and energy saving. Moreover, since there is no movable part, it can exhibit a function stably for a long period of time.

  In addition, the air distribution means is a structure that switches the air path, and when the air path is closed, the high-pressure air can be reliably blocked, so that the high-pressure air can be reliably distributed.

  Further, the air distribution means is a valve or a damper. If the valve or damper is used, the high-pressure air can be reliably shut off when the air passage is closed. it can.

  In addition, the air distributing means is configured to self-excitedly vibrate the high-pressure air blowing direction, and driving means for vibrating the high-pressure air blowing direction is unnecessary, and is necessary for driving. Energy is unnecessary and energy saving.

  Further, the air distributing means is a fluid element, and the fluid element is a suction port, a blowout air passage that is substantially rectangular and expands toward the plurality of nozzles, and an air passage branching portion that branches high-pressure air to the plurality of nozzles. A substantially rectangular main flow path communicating with the blowout air passage from the suction port, and a circulating air branching from one side on the long side of the main flow path and communicating with the long side surface of the opposite main flow path A high-pressure air blown from the blow-out air passage is vibrated in the short side direction of the main flow path, and the high-pressure air is alternately sent to the two blow-off air passages branched by the air passage branching portion. According to the feature, the gas in the circulation air passage is driven by the pressure difference between the long sides of the main passage, and as a result, the pressure difference is reversed, and the gas is driven again so that the blowout air passage High-pressure air blown out from the source vibrates in the short side direction of the main flow path, Since the compressed air is alternately sent to the two blowout air passages branched by the air passage branching portion, the driving means for vibrating the blowing direction of the high-pressure air is unnecessary, so the energy required for driving is unnecessary. It is energy saving. Moreover, since there is no movable part, it can exhibit a function stably for a long period of time.

  Further, the pressure reducing means is provided between the circulation air passage of the fluid element and the nozzle, and the pressure in the circulation air passage is increased to prevent stable self-excited vibration of high-pressure air. However, by providing the pressure reducing means, it is possible to suppress an increase in pressure in the circulation air passage, so that the high-pressure air can be stably self-excited by the fluid element.

  Further, the pressure reducing means is provided with a relief air passage communicating with the outside of the air flow blowing device, and the pressure in the circulation air passage is increased, thereby preventing stable self-excited vibration of high-pressure air. However, since the relief air passage communicating with the outside is provided as the decompression means, an increase in pressure in the circulation air passage can be suppressed, so that the high-pressure air can be stably self-excited by the fluid element.

  Further, the escape air passage is provided in the vicinity of the nozzle so that the direction of the high pressure air blown from the escape air passage is the same direction as the direction of the high pressure air blown from the nozzle, High-pressure air blown out from the escape air passage can also be used with high-pressure air blown out from the nozzle together with the high-pressure air blown out from the nozzle, so energy can be used without waste.

  Moreover, it is characterized by providing a plurality of air passage branching portions. By providing the number of air passage branching portions in accordance with the number of nozzles, a high pressure with a strength close to that of a single nozzle from each nozzle. Since air can be obtained, high-pressure air can be sent over a wide range, and power consumption can be reduced by reducing the air volume while maintaining the wind speed.

  A hand drying chamber having a space in which a hand can be inserted, an air flow blowing device according to any one of claims 1 to 12 for blowing high pressure air toward the hand drying chamber, and high pressure air is supplied to the air flow blowing device. And a high-pressure air generator that provides the same effect as that of the first aspect.

  Further, the hand drying device is characterized in that a plurality of nozzles are arranged in a direction substantially perpendicular to the hand insertion direction, and blows water droplets in a row in a direction substantially perpendicular to the hand insertion direction at an arbitrary position of the hand. Therefore, when pulling out the hand, water droplets can be moved from the wrist side to the fingertip direction, so that hand drying can be performed efficiently without drying unevenness.

  Further, the hand drying device is characterized in that the vibration direction of the high-pressure air is substantially perpendicular to the hand insertion direction, and blows water droplets in a row substantially perpendicular to the hand insertion direction at any position of the hand. Therefore, when pulling out a hand, a water droplet can be moved from the wrist side to the fingertip direction, so that the hand can be efficiently dried without uneven drying.

  Moreover, it is a hand dryer characterized by alternately blowing high-pressure air from adjacent nozzles, and water droplets are generated by high-pressure air blown from one of the nozzles by alternately blowing high-pressure air from adjacent nozzles. Is deformed by force, and the surface area of the water droplet becomes larger than before the high-pressure air hits, and the high-pressure air hits the water droplet in that state from the adjacent nozzle, so the drying speed of the water droplet is large Since it is so fast, it can efficiently dry by hand.

  Further, the present invention is a hand-drying device characterized in that a plurality of nozzles are divided into two nozzle groups and the two nozzle groups are arranged to face each other, and the hands are sandwiched by arranging the nozzles to face each other. Since the high-pressure air hits the hand as described above, when the hand is pulled out, the high-pressure air hits the entire hand, and the hand can be efficiently dried.

  Moreover, it is a hand-drying device characterized by alternately blowing high-pressure air from opposed nozzles, and the water droplets are deformed by the force of the high-pressure air blown from one of the nozzles. When the high-pressure air hits from the nozzle facing the water droplet in this state, the drying speed of the water droplet increases as the surface area of the water droplet increases, so that manual drying can be performed efficiently.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the air flow blowing device a11 guides the high-pressure air 12 to a suction port 13 for taking in the high-pressure air 12, and the fluid nozzles a14 and fluid nozzles b15 as a plurality of nozzles. It is composed of a blowout air passage 18 provided with an air passage branching portion 17 provided with a fluid element 16. Here, the high-pressure air 12 represents air having a pressure higher than atmospheric pressure. Further, as shown in the enlarged view of the fluid nozzle a14 in FIG. 2, the fluid nozzle a14 includes a blowout air passage 18, a blowout port 19 that is substantially rectangular and expands outward, a blowout air passage 18, and a blowout port 19. A circulation air passage a21 that branches from a long-side surface a52 on the long side of the main flow passage a20 and communicates with a long-side surface b53 of the opposite main flow passage a20. The gas in the circulating air passage a21 is driven by the pressure difference between the long sides of the main flow path a20. As a result, the pressure difference is reversed, and the gas is driven again, whereby the outlet 19 The high-pressure air 12 blown out from the self-excited vibration in the high-pressure air vibration direction 51. Further, as shown in the enlarged view of the fluid element 16 as the air distributing means in FIG. 3, the fluid element 16 is directed toward the suction port 13 and the fluid nozzles a14 and fluid nozzle b15 as a plurality of substantially rectangular nozzles. A blowout air passage 18 that expands, an air passage branching portion 17 that branches the high-pressure air 12 into a fluid nozzle a14 and a fluid nozzle b15, a substantially rectangular main passage b22 that communicates with the blowout air passage 18 from the suction port 13, and a main passage a circulation air passage b23 that branches off from the long-side surface c54 on the long side of b22 and communicates with the long-side surface d55 of the opposite main flow path b22, and pressures on both sides of the long side of the main flow path b22 The gas in the circulation air passage b23 is driven by the difference, and as a result, the pressure difference is reversed, and the high-pressure air 12 blown out from the blow-out air passage 18 by the gas being driven again is automatically generated in the short side direction of the main flow passage b22. Excited vibration and high pressure sky 12 to two blow air passage 18 which is branched by the air passage branching unit 17 is intended to send alternately. Further, the fluid element 16 has a relief air passage 24 as a decompression means communicating with the outside between the circulation air passage b23 and the fluid nozzle a14 and the fluid nozzle b15, and escapes in the vicinity of the fluid nozzle a14 and the fluid nozzle b15. The direction of the high-pressure air 12 blown out from the air passage 24 is provided so as to be the same direction as the direction of the high-pressure air 12 blown out from the fluid nozzle a14 and the fluid nozzle b15.

  According to such a configuration, since the nozzle is not moved, no mechanism is required to move the nozzle, and the apparatus can be made compact. Further, since the nozzle does not move, the function can be stably exhibited even if foreign matter comes into contact with the nozzle from the outside. In addition, even if multiple nozzles are arranged, high-pressure air with a strength close to that of a single nozzle can be obtained from each nozzle, so high-pressure air can be sent over a wide range, and when multiple nozzles are simply arranged In comparison, power consumption can be reduced by reducing the air volume while maintaining the wind speed. Moreover, since high-pressure air can be sent over a wide range by vibrating the blowing direction of high-pressure air, the number of nozzles can be reduced, and power consumption can be reduced by reducing the air volume while maintaining the wind speed. . In addition, if a fluid element is used as the air distributing means, driving means for vibrating the high-pressure air blowing direction is unnecessary, so that energy necessary for driving is unnecessary and energy saving is achieved. Moreover, since there is no movable part, it can exhibit a function stably for a long period of time. In addition, since the pressure reducing means is provided in the fluid element, an increase in pressure in the circulation air passage can be suppressed, so that the high-pressure air can be stably vibrated by the fluid element. In addition, the escape air passage is provided in the vicinity of the nozzle so that the direction of the high pressure air blown from the escape air passage is the same direction as the direction of the high pressure air blown from the nozzle, so that the air is blown from the escape air passage. The high-pressure air can also be used without waste because the high-pressure air can be supplied to the target together with the high-pressure air blown from the nozzle.

(Embodiment 2)
As shown in FIG. 4, the air flow blowing device b25 guides the high-pressure air 12 to the suction port 13 and the high-pressure air 12 to the fluid nozzle a14 and the fluid nozzle b15 as a plurality of nozzles. It is comprised by the blowing air path 18 which has arrange | positioned the air path branch part 17 provided with the damper a26 and the damper b27. By alternately opening and closing the damper a26 and the damper b27, the damper a26 and the damper b27 are alternately sent to the two blowing air passages 18 branched by the air passage branching portion 17. In addition, although the damper a26 and the damper b27 were mentioned as an example here, a valve may be sufficient.

  According to such a configuration, since the nozzle is not moved, no mechanism is required to move the nozzle, and the apparatus can be made compact. Further, since the nozzle does not move, the function can be stably exhibited even if foreign matter comes into contact with the nozzle from the outside. In addition, even if multiple nozzles are arranged, high-pressure air with a strength close to that of a single nozzle can be obtained from each nozzle, so high-pressure air can be sent over a wide range, and when multiple nozzles are simply arranged In comparison, power consumption can be reduced by reducing the air volume while maintaining the wind speed. Moreover, since high-pressure air can be sent over a wide range by vibrating the blowing direction of high-pressure air, the number of nozzles can be reduced, and power consumption can be reduced by reducing the air volume while maintaining the wind speed. . Further, when the air passage is closed by a valve or a damper, the high-pressure air can be reliably blocked, so that the high-pressure air can be reliably distributed.

(Embodiment 3)
As shown in FIG. 5, the hand drying device a28 includes a hand drying chamber a29 having a space in which a hand can be inserted, an airflow blowing device c30 that blows high-pressure air 12 toward the hand drying chamber a29, and an airflow blowing device c30. A high-pressure air generator a31 that supplies high-pressure air 12 is provided. Here, in the hand drying device a28, the hand is inserted from the front toward the back. The high pressure air 12 is preferably about 5 to 12 kPa for removing water droplets. Moreover, as shown in the enlarged view of the airflow blowing device c30 that blows out in FIG. 6, the airflow blowing device c30 is disposed substantially perpendicular to the insertion direction of the hand and the air distribution means a32 provided in the plurality of air passage branching portions. The high pressure air 12 is composed of a plurality of nozzles a to h33 to 40, and the vibration direction is substantially perpendicular to the hand insertion direction. At this time, the high pressure air 12 is alternately blown out from the adjacent nozzle a33-nozzle b34, nozzle c35-nozzle d36, nozzle e37-nozzle f38, and nozzle g39-nozzle h40.

  According to such a configuration, even if a plurality of nozzles are arranged, high-pressure air having a strength close to that of a single nozzle can be obtained from each nozzle. The power consumption can be reduced by reducing the air volume while maintaining the wind speed as compared with the case where a plurality of air-conditioners are arranged. In addition, by arranging a plurality of nozzles in a direction substantially perpendicular to the insertion direction of the hand, it is possible to blow out a single row of water droplets in a direction substantially perpendicular to the insertion direction of the hand at any position of the hand. Since water droplets can be moved in the fingertip direction from the wrist side, it is possible to perform hand drying efficiently without drying unevenness. Moreover, since the vibration direction of the high-pressure air is substantially perpendicular to the insertion direction of the hand, it is possible to blow out water droplets in a row substantially perpendicular to the insertion direction of the hand at any position of the hand. At this time, since the water droplets can be moved from the wrist side to the fingertip direction, the hand drying can be performed efficiently without drying unevenness. In addition, by alternately blowing high pressure air from adjacent nozzles, high pressure air is alternately blown from adjacent nozzles, so that water droplets are deformed by the force of high pressure air blown from any nozzle, The surface area of the water droplets is larger than before high-pressure air hits, and the high-pressure air hits the water droplets in that state from the adjacent nozzle. It can be performed.

(Embodiment 4)
As shown in FIG. 7, the hand drying device b41 includes a hand drying chamber b42 having a space in which a hand can be inserted, one or a plurality of nozzle groups a43, nozzles that blow high-pressure air 12 toward the hand drying chamber b42. A group b44, a nozzle group a43, and a high-pressure air generator b45 that supplies the high-pressure air 12 to the nozzle group b44 are provided. Here, in the hand drying device b41, the hand is inserted between the nozzle group a43 and the nozzle group b44 from above in the drawing. Further, the nozzle group a43 and the nozzle group b44 are arranged to face each other, and the high pressure air 12 is alternately blown from the nozzle group a43 and the nozzle group b44 facing each other by the air distribution means b46 provided in the air passage branching portion. Is.

  According to such a configuration, by arranging the nozzles so as to face each other, the high-pressure air hits the hand so as to pinch the hand. Therefore, when the hand is pulled out, the high-pressure air hits the entire hand, and the hand can be efficiently dried. it can.

  In addition, by alternately blowing high-pressure air from the opposed nozzles, the water droplets are deformed by the force of the high-pressure air blown from one of the nozzles, and the surface area of the water droplets is larger than before the high-pressure air hits them. Thus, when the high-pressure air hits the nozzle facing the water droplet in that state, the drying speed of the water droplet is faster as the surface area of the water droplet is larger, so that manual drying can be performed efficiently.

  The airflow blowing device according to the present invention can be applied to a hand-drying device that blows off water droplets attached to the hand, and can also be applied to uses for removing water droplets and dust attached to an object with high-pressure air.

11 Airflow blowing device a
12 High-pressure air 13 Suction port 14 Fluid nozzle a
15 Fluid nozzle b
16 Fluid element 17 Air channel branching portion 18 Air outlet 19 Air outlet 20 Main channel a
21 Circulating air passage a
22 Main flow path b
23 Circulating air passage b
24 Relief air passage 25 Air flow outlet b
26 Damper a
27 Damper b
28 Hand dryer a
29 Hand drying room a
30 Air blowout device c
31 High pressure air generator a
32 Air distribution means a
33 Nozzle a
34 Nozzle b
35 nozzle c
36 nozzle d
37 nozzle e
38 nozzle f
39 Nozzle g
40 nozzles h
41 Hand dryer b
42 Hand drying room b
43 Nozzle group a
44 Nozzle group b
45 High pressure air generator b
46 Air distribution means b
51 High-pressure air vibration direction 52 Surface a
53 side b
54 side c
55 side d
DESCRIPTION OF SYMBOLS 101 Air blower 102 Filter 103 Fluid nozzle 201 Gas blowing nozzle 202 Supply part 203 Blowing nozzle drive means

Claims (18)

An air flow blowing device comprising a plurality of stationary nozzles, wherein high-pressure air whose oscillation direction is oscillated from each of the plurality of stationary nozzles is sequentially blown out from each of the nozzles. A suction port for taking in high-pressure air; and a blow-off air passage having at least one air passage branch for guiding the high-pressure air to a plurality of nozzles, and air distribution means is provided in the air passage branch, and the air passage branch The airflow blowing device according to claim 1, wherein the high-pressure air is sequentially flowed by the air distribution means to the blowing air passage branched by the airflow. The air flow blowing device according to claim 1 or 2, wherein the blowing direction of the high-pressure air blown from the nozzle is self-excited. A blowout air passage in which a nozzle is branched by an air passage branching portion, a blowout port that is substantially rectangular and expands toward the outside, a substantially rectangular main passage that communicates the blowout opening from the blowout air passage, and the main flow passage A high-pressure air that branches off from one side on the long side and communicates with the surface on the long side of the opposite main flow path is vibrated in the short side direction of the main flow path. The airflow blowing device according to any one of claims 1 to 3, wherein the airflow blowing device is a fluid nozzle. The airflow blowing device according to any one of claims 1 to 4, wherein the air distribution means is a structure that switches an air path. 6. The air flow blowing device according to claim 5, wherein the air distributing means is a valve or a damper. 5. The air flow blowing device according to claim 1, wherein the air distribution means is configured to self-excitedly vibrate a high-pressure air blowing direction. The air distribution means is a fluid element, and the fluid element is a suction port, a blowout air passage that is substantially rectangular and expands toward the plurality of nozzles, and an air passage branching portion that branches high-pressure air to the plurality of nozzles. A substantially rectangular main flow path communicating with the blowing air passage from the suction port, and a circulation air passage branched from one side on the long side of the main flow passage and communicating with the surface on the long side of the opposite main flow passage; The high-pressure air blown from the blow-out air passage is vibrated in the short side direction of the main flow passage, and the high-pressure air is alternately sent to the two blow-off air passages branched by the air passage branching portion. The airflow blowing device according to claim 7. 9. The air flow blowing device according to claim 8, wherein a pressure reducing means is provided between the circulation air passage of the fluid element and the nozzle. The airflow blowing device according to claim 9, wherein the pressure reducing means is provided with a relief air passage communicating with the outside of the airflow blowing device. The escape air passage is provided in the vicinity of the nozzle so that the direction of the high pressure air blown from the escape air passage is the same as the direction of the high pressure air blown from the nozzle. Air blowout device. The airflow blowing device according to any one of claims 1 to 11, wherein a plurality of air passage branching portions are provided. A hand drying chamber having a space in which a hand can be inserted, an air flow blowing device according to any one of claims 1 to 12 for blowing high pressure air toward the hand drying chamber, and a high pressure for supplying high pressure air to the air flow blowing device A hand dryer provided with an air generator. The hand dryer according to claim 13, wherein the plurality of nozzles are arranged in a direction substantially perpendicular to the insertion direction of the hand. 15. The hand dryer according to claim 13, wherein the vibration direction of the high-pressure air is substantially perpendicular to the hand insertion direction. The hand dryer according to claim 13, wherein high-pressure air is alternately blown from adjacent nozzles. The hand drying apparatus according to any one of claims 13 to 16, wherein a plurality of nozzles are divided into two nozzle groups, and the two nozzle groups are arranged to face each other. The hand dryer according to claim 17, wherein high-pressure air is alternately blown from the opposed nozzles.

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