JP2011080738A - Air blowing device and hand drying device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air blowing device capable of suppressing growth of the swirl generated in the vicinity of a blowout port even when high-temperature air is oscillated, and capable of reducing the noise, and a hand drying device using the same. <P>SOLUTION: A groove 17 or a glass fiber thread material 22 as a swirl control means is disposed in the blowout port 16 of the air blowing device 11. Accordingly, in the hand drying device using the air blowing device 11, even when the high-pressure air is oscillated, growth of the swirl generated in the vicinity of the blowout port can be suppressed, and the noise can be reduced. <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 has a circulation airflow path that divides the flow path in the middle of the blowout opening that expands from the inlet to the downstream so as to periodically change the flow of high-pressure air and connects both end faces Is known (for example, see Patent Document 1).

  Here, the oscillation frequency of the high-pressure air can be controlled by changing the length of the circulation air path. Specifically, when the length of the circulation air path is shortened, the oscillation frequency is increased, and when the length is increased, the oscillation frequency is decreased. By periodically changing the flow of high-pressure air, it is possible to supply high-pressure air over a wide range, and it is possible to reduce power consumption by reducing the air volume while maintaining the wind speed compared to simply arranging multiple nozzles. It can be done.

  Hereinafter, an example of the air flow blowing device will be described with reference to FIG.

  As shown in FIG. 9, a slit-like outlet 102 is formed by a diffuser 101 that expands in a fan shape, a float outlet 104 that blows out high-pressure air is disposed at a narrow inlet 103 of the diffuser 101, and the diffuser 101 Both ends of openings 106 and 107 of the circulation air passage 105 are arranged at the connection portion between the narrow portion inlet 103 and the float outlet 104, and the pipe resistance of the orifice 108 and the like in the circulation air passage 105 is variable. The structure is provided with variable means. Further, the air path length of the circulation air path 105 can be arbitrarily changed.

JP-A-8-145449

  In such a conventional airflow blowing device, when high-pressure air oscillates, a vortex is generated around the air outlet, and therefore, when high-pressure air is passed through the airflow blowing device, there is a problem that noise is generated from the generated vortex. there were.

  The present invention solves the above-mentioned conventional problems, and even when high-pressure air oscillates, the airflow blowing device that can suppress the growth of vortices generated around the blowout port and reduce noise, and the use thereof An object of the present invention is to provide a hand dryer.

  In order to achieve this object, the present invention provides an air flow blowing device characterized in that vortex control means is provided at the air outlet of the air flow blowing device, thereby achieving the intended purpose. Is.

  According to the present invention, a suction port for taking in high-pressure air, a blow-out port whose cross section in a direction perpendicular to the flow of high-pressure air is substantially rectangular and expands outward, and a substantially rectangular shape that communicates the blow-out port from the suction port. High-pressure air that is blown out from the outlet, comprising a main flow passage of the main flow passage and a circulation air passage that branches off from one side on the long side of the main flow passage and communicates with a surface on the long side of the opposite main flow passage. In the air flow blowing device that vibrates in the direction of the short side of the main flow path, the vortex generated due to the vibrating high-pressure air is obtained by adopting the structure of the air flow blowing device characterized in that a vortex control means is provided at the blow-out port. Therefore, the noise generated from the air flow blowing device can be reduced while maintaining stable self-excited oscillation of high-pressure air.

The perspective view of the airflow blowing apparatus of Embodiment 1 of this invention Sectional perspective view of the airflow blowing device of Embodiment 1 of this invention The perspective view of the airflow blowing apparatus of Embodiment 2 of this invention The perspective view of the airflow blowing apparatus of Embodiment 3 of this invention The perspective view of the thread | yarn material installation member of Embodiment 3 of this invention Schematic cross-sectional view of a hand dryer according to Embodiment 4 of the present invention The expanded perspective view of the blower outlet of the airflow blowing apparatus of Embodiment 5 of this invention The expansion perspective view of the blowing outlet of the air flow blowing device of Embodiment 6 of this invention Sectional drawing which shows an example of a prior art

  The air flow blowing device according to claim 1 of the present invention includes a suction port for taking in high-pressure air, a blow-off port having a substantially rectangular cross section in a direction perpendicular to the flow of high-pressure air, and expanding toward the outside. A substantially rectangular main channel that communicates with the outlet, and a circulation air channel that branches off from one side on the long side of the main channel and communicates with the surface on the long side of the opposite main channel, In the airflow blowing device that vibrates high-pressure air blown from the blowout port in the short side direction of the main flow path, vortex control means is provided at the blowout port.

  This makes it possible to control by reducing or dispersing the vortex generated by the vibrating high-pressure air, reducing the noise generated from the airflow blowing device while maintaining stable high-pressure air self-oscillation can do. Here, the high-pressure air indicates an atmospheric pressure or higher.

  Further, the height from the inflow portion to the outflow portion of the blowout port changes smoothly, and an increase in loss when high-pressure air passes through the blowout port can be suppressed.

  Further, the vortex control means is characterized in that the average height of the outlet portion of the outlet is smaller than the average height of the inlet portion of the outlet, which suppresses the growth of vortices. Therefore, the noise generated from the airflow blowing device can be reduced.

  Further, the vortex control means is characterized in that the height of the central part of the cross section of the outflow part in the direction parallel to the vibration direction of the high-pressure air at the outlet is smaller than the height of both wall surface parts. Therefore, since it is possible to suppress the growth of vortices generated due to the vibrating high-pressure air, it is possible to reduce noise generated from the airflow blowing device.

  In addition, the height of the central part of the cross section of the outflow part in the direction parallel to the direction of vibration of the high-pressure air at the outlet is smaller than the height of the central part of the inflow part, suppressing vortex growth Therefore, noise generated from the airflow blowing device can be reduced.

  Further, the height of the central part of the cross section of the outflow part in the parallel direction with respect to the vibration direction of the high-pressure air at the outlet is 70% or more of the height of the central part of the inflow part, Since the growth of vortices can be suppressed, noise generated from the airflow blowing device can be reduced. Here, it is preferable that the oscillation of the high-pressure air becomes unstable if the height of the central portion of the cross section in the parallel direction is less than 70% of the height of the central portion of the inflow portion with respect to the vibration direction of the high-pressure air in the outflow portion. Absent.

  In addition, the cross section of the outflow portion parallel to the direction of vibration of the high-pressure air at the outlet is provided so as to be symmetric with respect to the vertical center line. Since the high-pressure air to be blown out can be blown out with a wind speed distribution that is substantially symmetrical with respect to the surface located at the center, it is possible to suppress the deviation of the wind speed distribution of the high-pressure air blown out from the air flow blowing device.

  Further, the vortex control means is characterized by being one or more recesses provided on at least one of the wall surfaces parallel to the vibration direction of the high-pressure air at the outlet, and is generated due to the vibrating high-pressure air Since the growth of the vortex can be suppressed by the recess, the noise generated from the airflow blowing device can be reduced.

  In addition, the concave portion is a groove, and the growth of vortices caused by vibrating high-pressure air can be suppressed by the groove, so that noise generated from the airflow blowing device can be reduced. it can.

  In addition, the depth of the groove is 0.01 times or more and 0.6 times or less of the length of the outlet, and the growth of vortices caused by the vibrating high-pressure air is more effectively caused by the groove. Since it can suppress, the noise which generate | occur | produces from an airflow blowing apparatus can be reduced. Here, if the depth of the groove is less than 0.01 times the length of the outlet, the effect of suppressing the growth of vortices is not noticeable, and if it is more than 0.6 times, oscillation of high-pressure air becomes unstable.

  In addition, a curvature is provided at the corner of the bottom of the groove. By providing a curvature at the corner of the bottom of the groove, pressure loss when high-pressure air passes through the groove can be reduced.

  Further, the groove is provided on the surface located in the center with respect to both wall surfaces of the outlet port in the vibration direction of the high-pressure air, and the high-pressure air blown from the airflow blowing device is located in the center. Since the air can be blown out with a substantially symmetric wind speed distribution with respect to the surface to be blown, the deviation of the wind speed distribution of the high-pressure air blown from the air flow blowing device can be suppressed.

  The cross section in the direction parallel to the vibration direction of the high-pressure air in the groove is provided so as to be symmetrical with respect to the plane located at the center. Can be blown out with a substantially symmetric wind speed distribution with respect to the plane located at the center, so that the bias of the wind speed distribution of the high-pressure air blown out from the air flow blowing device can be suppressed.

  In addition, the cross-sectional shape in the direction parallel to the vibration direction of the high-pressure air in the groove is perpendicular to the vibration direction of the high-pressure air, the side facing the outlet of the outlet wall surface, and the outlet in the vibration direction of the high-pressure air It is characterized by a substantially triangular prism consisting of two sides that are substantially parallel to both wall surfaces. When high-pressure air adheres to the outlet wall surface in the vibration direction of high-pressure air, it forms a blow direction and grooves for high-pressure air. Since one side to be parallel becomes parallel and does not disturb the flow of the high-pressure air, the wind speed attenuation of the high-pressure air can be reduced.

  Further, the vortex control means is a yarn material provided substantially perpendicular to the jet direction of the high-pressure air at the outlet outlet, and the vortex growth caused by the vibrating high-pressure air is Since it can suppress by material, the noise which generate | occur | produces from an airflow blowing apparatus can be reduced.

  Moreover, the installation direction of the yarn material is parallel to the vibration direction of the high-pressure air, and the growth of vortex generated due to the vibrating high-pressure air can be suppressed by the yarn material. Noise generated from the airflow blowing device can be reduced.

  Further, the installation direction of the yarn material is characterized by being perpendicular to the vibration direction of the high-pressure air, and the growth of vortices caused by the vibrating high-pressure air can be suppressed by the yarn material, Noise generated from the airflow blowing device can be reduced.

  In addition, it is characterized by the material of the thread material being inorganic, and if it is inorganic, it is excellent in moisture resistance and heat resistance, so that the durability of the thread material can be enhanced and stable performance is demonstrated for a long time. be able to.

  In addition, the material of the thread material is a resin, and it is excellent in moldability, and by selecting the material, durability can be achieved even in various atmospheres where acid and alkaline liquids come into contact. Can be ensured, and stable performance can be exhibited.

  In addition, the material of the thread material is a metal, and if it is a metal, it is excellent in durability and can exhibit stable performance for a long period of time. Further, by using an antibacterial metal such as silver, it is possible to prevent bacteria and the like from growing on the yarn material, and to keep the yarn material clean.

  In addition, the thread material can be removed. When the thread material is soiled, deteriorated or damaged, the thread material can be removed and replaced or cleaned, so that maintenance can be improved.

  Further, the thread material is fixed to the thread material installation member, and the thread material installation member is detachably provided. When the thread material is soiled, deteriorated or damaged, the thread material is removed. Since it can be exchanged or cleaned, the maintainability can be improved.

  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 22 that blows high pressure air toward the hand drying chamber, and high pressure air is supplied to the air flow blowing device. This is a hand-drying device equipped with a high-pressure air generator that reduces the size of the vortex generated by the oscillating high-pressure air or disperses it by providing a vortex control means at the air outlet of the air flow blowing device. Therefore, it is possible to reduce noise generated from the airflow blowing device while maintaining stable self-excited oscillation of high-pressure air. Here, the high-pressure air indicates an atmospheric pressure or higher.

  Further, the thickness of the thread material is such that the projected cross-sectional area of the thread material is 0.1% or more and 10% or less of the cross-sectional area of the outlet, and the thickness of the thread material is By setting the thickness so that the projected cross-sectional area of the yarn material is 0.1% or more and 10% or less of the cross-sectional area of the outlet, the vortex growth is suppressed while maintaining the high-speed air speed required for the hand dryer. Noise generated from the airflow blowing device can be reduced. Here, when the projected cross-sectional area of the thread material is less than 0.1% of the cross-sectional area of the outlet, the noise reduction effect due to the effect of suppressing the vortex growth is not noticeable. Therefore, it is not preferable because the wind speed of high-pressure air necessary for this cannot be obtained, or oscillation of high-pressure air becomes unstable.

  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 11 includes a nozzle portion 12 and a circulation air path 13. FIG. 2 shows a perspective view of a cross section of the nozzle portion 12 cut along the plane A. FIG.

  As shown in FIG. 2, the nozzle portion 12 has a suction port 15 for taking in the high-pressure air 14, a rectangular blowout port 16 that expands outward, and a concave shape as a vortex control means provided in the blowout port 16. A triangular prism groove 17 and a rectangular main flow path 18 communicating from the suction port 15 to the blowout port 16 are formed.

  The groove 17 of the triangular prism is provided with a curvature at the corner of the bottom, and the installation location of the groove 17 is on the surface located in the center with respect to the wall surfaces of the outlet 16 in the high-pressure air vibration direction 19. The cross section in the parallel direction with respect to the high-pressure air vibration direction 19 of 17 has a symmetrical shape with respect to the surface located at the center, and the triangular prism is composed of two sides parallel to the both wall surfaces of the outlet.

  At this time, the depth of the groove was 0.4 times the length of the outlet 16. Here, the high-pressure air 14 passing through the main flow path 18 drives the gas in the circulation air passage 13 by the pressure difference between the long side surface a20 and the surface b21 of the main flow path 18, and as a result, the pressure difference is reversed. When the gas is driven again, the high-pressure air 14 blown from the blow-out port 16 is self-excited in the high-pressure air vibration direction 19. Here, the high-pressure air 14 flows alternately adhering to the surfaces a20 and b21 when vibrating, but when the high-pressure air 14 adheres to one surface, for example, the surface a20, the opposite surface. The high-pressure air 14 does not flow through b21, and air enters the space near the surface b21 from the outside of the outlet 16 in a form of being caught in the high-pressure air 14 attached to the surface a20. At this time, a vortex is generated by the interaction between the high-pressure air 14 and the air entrained by the high-pressure air 14, which causes noise.

  According to such a configuration, by providing a groove as a vortex control means at the outlet, it is possible to control by reducing or dispersing the vortex generated due to the vibrating high pressure air. While maintaining the self-excited oscillation of high-pressure air, noise generated from the airflow blowing device can be reduced. Here, the high-pressure air means atmospheric pressure or higher, for example, about 3 to 12 kPa. Further, by providing a curvature at the corner of the bottom of the groove, it is possible to reduce pressure loss when high-pressure air passes through the groove by providing a curvature at the corner of the bottom of the groove. In addition, the groove is provided on the surface located in the center with respect to both wall surfaces of the outlet in the vibration direction of the high-pressure air, and the cross section parallel to the vibration direction of the high-pressure air in the groove is at the center. Since it is provided so as to be symmetric with respect to the surface located, high-pressure air blown from the air flow blowing device can be blown out with a substantially symmetric wind speed distribution with respect to the surface located in the center. The bias of the wind speed distribution of the high-pressure air blown from the apparatus can be suppressed. In addition, the cross-sectional shape in a direction parallel to the vibration direction of the high-pressure air in the groove is perpendicular to the vibration direction of the high-pressure air, the side facing the outlet of the outlet wall surface, and the outlet in the vibration direction of the high-pressure air By being a substantially triangular prism consisting of two sides that are substantially parallel to both wall surfaces, when high-pressure air adheres to the outlet wall surface in the direction of vibration of high-pressure air, the direction in which the high-pressure air is blown is parallel to one side that constitutes the groove. Since the flow of high-pressure air is not disturbed, the wind speed attenuation of high-pressure air can be reduced. Moreover, since the depth of the groove is not less than 0.01 times and not more than 0.6 times the length of the outlet, it is possible to effectively suppress the growth of vortices caused by the oscillating high-pressure air by the groove. The noise generated from the airflow blowing device can be reduced. Here, if the depth of the groove is less than 0.01 times the length of the outlet, the effect of suppressing the growth of vortices is not noticeable, and if it is more than 0.6 times, oscillation of high-pressure air becomes unstable.

(Embodiment 2)
As shown in FIG. 3, the airflow blowing device 11 includes a nozzle portion 12 and a circulation air passage 13, and a groove 17 as a vortex control means and a glass fiber yarn material 22 that is an inorganic substance are provided at a blowout port 16. It is the composition which was made. The glass fiber yarn material 22 is detachably attached to the airflow blowing device 11. The structure is such that a groove for inserting the glass fiber thread material 22 into the airflow blowing device 11 is cut, and the glass fiber thread material 22 is inserted into the groove. Further, in order to prevent the fiberglass yarn material 22 from coming off, the yarn material pressing member 23 presses the glass fiber yarn material 22 against the airflow blowing device 11 to the airflow blowing device 11 through the screw fixing holes 24. It has a fixed configuration. The glass fiber yarn material 22 is configured to be installed substantially perpendicular to the jet direction of the high-pressure air and parallel to the vibration direction of the high-pressure air.

  According to such a configuration, since the yarn material can suppress the growth of vortices caused by the high-pressure air that vibrates by installing the yarn material at the outlet, the noise generated from the airflow blowing device is reduced. Can be reduced. In addition, since the material of the thread material is an inorganic material, the inorganic material is excellent in moisture resistance and heat resistance, so that the durability of the thread material can be improved and stable performance can be exhibited for a long period of time. As the inorganic thread material, existing ones such as a thread material using fibers composed of minerals can be used. In addition, the synergistic effect of the groove provided in the outlet and the thread material can effectively suppress the growth of vortices caused by the oscillating high-pressure air. Can be reduced. Further, since the thread material can be removed, when the thread material is soiled, deteriorated or damaged, it can be removed and replaced or cleaned, so that maintainability can be improved.

(Embodiment 3)
As shown in FIG. 4, the airflow blowing device 11 includes a nozzle portion 12 and a circulation air passage 13, and a structure in which a silver thread material 25 that is a metal as a vortex control means is provided in a blowout port 16. It has become. As shown in a perspective view of the thread material installation member in FIG. 5, the silver thread material 25 is fitted in a groove provided in the thread material installation member 26, and the thread material installation member 26 is placed in the air blowing device 11 with silver. The thread member 25 is pressed against the airflow blowing device 11 by a screw fixing hole 24 so as to be detachable. The silver thread material 25 is configured to be installed substantially perpendicular to the high-pressure air ejection direction and perpendicular to the high-pressure air vibration direction.

  According to such a configuration, since the yarn material can suppress the growth of vortices caused by the high-pressure air that vibrates by installing the yarn material at the outlet, the noise generated from the airflow blowing device is reduced. Can be reduced. Moreover, since the material of the thread material is a metal, if it is a metal, since it is excellent in durability, a stable performance for a long time can be exhibited. Further, by using an antibacterial metal such as silver, it is possible to prevent bacteria and the like from growing on the yarn material, and to keep the yarn material clean. Also, by fixing the thread material to the thread material installation member and detachably installing the thread material installation member, if the thread material becomes dirty, deteriorates or breaks, it can be removed and replaced or cleaned. Therefore, maintainability can be improved.

(Embodiment 4)
As shown in FIG. 6, the hand drying device 27 includes a hand drying chamber 28 having a space in which a hand can be inserted, an air flow blowing device 11 that blows high-pressure air 14 toward the hand drying chamber 28, and an air flow blowing device 11. A high-pressure air generator 29 that supplies high-pressure air 14 and an air passage 30 that connects the air flow blowing device 11 and the high-pressure air generator 29 are provided. A polyester yarn material 31 which is a resin as a vortex control means is installed in the airflow blowing device 11. The thickness of the polyester thread material 31 was such that the projected cross-sectional area of the thread material was 3.5% of the cross-sectional area of the outlet. Here, the air flow blowing device 11 is designed so that the oscillation frequency of the high-pressure air 14 is 100 Hz or more.

  According to such a configuration, since the vortex control means is provided at the outlet of the airflow blowing device, it can be controlled by reducing or dispersing the vortex generated due to the vibrating high-pressure air. The noise generated from the airflow blowing device can be reduced while maintaining the self-excited oscillation of the high-pressure air. Here, high-pressure air indicates that the pressure is higher than atmospheric pressure, and is, for example, about 3 to 12 kPa. In addition, since the material of the thread material is resin, it is excellent in formability, and by selecting the material, durability can be ensured even in various atmospheres where liquids such as acidity and alkalinity come into contact. , Can exhibit stable performance. Further, the thickness of the thread material is set such that the projected cross-sectional area of the thread material is not less than 0.1% and not more than 10% of the cross-sectional area of the outlet. By making the thickness to be 0.1% or more and 10% or less of the cross-sectional area of the blowout port, it is generated from the airflow blowout device by suppressing the growth of vortices while maintaining the high-speed air speed necessary for the hand dryer. Noise can be reduced. Here, when the projected cross-sectional area of the thread material is less than 0.1% of the cross-sectional area of the outlet, the noise reduction effect due to the effect of suppressing the vortex growth is not noticeable. Therefore, it is not preferable because the wind speed of high-pressure air necessary for this cannot be obtained, or oscillation of high-pressure air becomes unstable.

(Embodiment 5)
As shown in the enlarged perspective view of the air outlet of the airflow outlet device in FIG. 7, the air outlet 16 serves as a vortex control means and the average height 41 of the outlet of the outlet is smaller than the average height 42 of the inlet of the air outlet. It has a configuration. Further, the height from the inflow portion to the outflow portion of the outlet is smoothly changed. Moreover, the cross section of the outflow part in the parallel direction with respect to the vibration direction of the high-pressure air at the outlet is provided to be symmetric with respect to the vertical center line.

  In such a configuration, the average height 41 of the outlet portion of the outlet is smaller than the average height 42 of the inlet portion of the outlet, so that when the high-pressure air vibrates, it is opposite to the outlet direction of the high-pressure air. Since vortices generated in the vicinity of the wall surface can be reduced, noise generated from the airflow blowing device can be reduced while maintaining stable self-excited oscillation of high-pressure air.

  Here, high-pressure air indicates that the pressure is higher than atmospheric pressure, and is, for example, about 3 to 12 kPa. In addition, since the height from the inflow portion to the outflow portion of the blowout port changes smoothly, an increase in loss when high-pressure air passes through the blowout port can be suppressed.

  In addition, the cross section of the outflow portion in the parallel direction is symmetric with respect to the vertical center line with respect to the vibration direction of the high-pressure air at the outlet, so that the high-pressure air blown out from the airflow blowing device can be reduced. Since the air can be blown out with a wind speed distribution that is substantially symmetrical with respect to the vertical center line, it is possible to suppress the deviation of the wind speed distribution of the high-pressure air blown from the air flow blowing device.

(Embodiment 6)
As shown in the enlarged perspective view of the air outlet of the airflow blowing device in FIG. 8, the air outlet 16 has a configuration in which the central part height 51 of the outflow part is smaller than the central part height 52 of the inflow part as vortex control means, And the center part height 51 of an outflow part is the structure smaller than the side wall part height 53 of an outflow part. Here, the central part height 51 of the outflow part was 85% of the central part height 52 of the inflow part.

  Moreover, in this Embodiment, although the center part height 51 of the outflow part of the blower outlet was 85% of the center part height 52 of the inflow part, if it is 70% or more of the center part height 52 of the inflow part, Since the growth of vortices can be suppressed, noise generated from the airflow blowing device can be reduced.

  In such a configuration, since the central part height 51 of the outflow part is smaller than the central part height 52 of the inflow part, it is generated near the wall surface opposite to the high-pressure air blowing direction when high-pressure air vibrates. Therefore, the noise generated from the airflow blowing device can be reduced while maintaining stable high-pressure air self-oscillation. Further, since the central part height 51 of the outflow part is smaller than the side wall part height 53 of the outflow part, the vortex generated in the vicinity of the wall surface opposite to the high-pressure air blowing direction is generated when the high-pressure air vibrates. Since the height of the central portion of the outflow portion can be suppressed from growing toward the central portion of the slag, it is more effective than changing the height in parallel as described in the fifth embodiment. Since the growth of vortices can be suppressed, noise generated from the airflow blowing device can be reduced. Noise generated from the airflow blowing device can be reduced. Here, high-pressure air indicates that the pressure is higher than atmospheric pressure, and is, for example, about 3 to 12 kPa.

  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.

DESCRIPTION OF SYMBOLS 11 Airflow blowing apparatus 12 Nozzle part 13 Circulating air path 14 High pressure air 15 Inlet 16 Outlet 17 Groove 18 Main flow path 19 High pressure air vibration direction 20 Surface a
21 side b
22 Thread material of glass fiber 23 Thread material pressing member 24 Hole 25 Silver thread material 26 Thread material installation member 27 Hand dryer 28 Hand dryer 29 High pressure air generator 30 Air passage 31 Polyester yarn material 41 Average height of outflow part 42 Average height of the inflow part 51 Height of the central part of the outflow part 52 Height of the central part of the inflow part 53 Height of the side wall part of the outflow part 101 Diffuser 102 Outlet 103 Narrow part inlet 104 Float outlet 105 Circulating air passage 106 Both ends opening 107 Both ends opening 108 Orifice

Claims (24)

A suction port for taking in high-pressure air, a blow-off port whose cross section in a direction perpendicular to the flow of high-pressure air is substantially rectangular and expands toward the outside, a substantially rectangular main flow path communicating with the blow-out port from the suction port, A high-pressure air that branches off from one side on the long side of the main flow path and communicates with a surface on the long side of the main flow path on the opposite side. An airflow blowing device that vibrates in a side direction, wherein vortex control means is provided at a blowout port. The air flow blowing device according to claim 1, wherein the height from the inflow portion to the outflow portion of the blowout port changes smoothly. 3. The air flow blowing device according to claim 2, wherein the vortex control means is configured such that the average height of the outlet portion of the outlet is smaller than the average height of the inlet portion of the outlet. The vortex control means is configured such that the height of the central portion of the cross section of the outflow portion in the direction parallel to the vibration direction of the high-pressure air at the outlet is smaller than the height of both wall surface portions. Item 4. The airflow blowing device according to any one of Items 2 to 3. The height of the central part of the cross section of the outflow part in the parallel direction with respect to the vibration direction of the high-pressure air at the outlet is smaller than the height of the central part of the inflow part. Air blowout device. 6. The height of the central part of the cross section of the outflow part in the direction parallel to the vibration direction of the high-pressure air at the outlet is 70% or more of the height of the central part of the inflow part. Air blowout device. The cross section of the outflow portion in the parallel direction with respect to the vibration direction of the high-pressure air at the outlet is provided so as to be symmetric with respect to the vertical center line. Air blowout device. 2. The airflow blowing device according to claim 1, wherein the vortex control means is one or more concave portions provided on at least one of the wall surfaces parallel to the vibration direction of the high-pressure air at the blowout port. The airflow blowing device according to claim 8, wherein the recess is a groove. The depth of a groove is 0.01 times or more and 0.6 times or less of the blower outlet length, The air current blowing device according to claim 9 characterized by things. The airflow blowing device according to claim 8 or 10, wherein a curvature is provided at a corner of the bottom of the groove. The air flow blowing device according to any one of claims 8 to 11, wherein the groove is provided on a surface located in the center with respect to both wall surfaces of the blowing port in the vibration direction of the high-pressure air. The airflow blowing device according to any one of claims 8 to 12, wherein a cross section in a parallel direction with respect to a vibration direction of the high-pressure air in the groove is symmetric with respect to a plane located at the center. . One side facing the outlet of the outlet wall, the cross-sectional shape parallel to the direction of vibration of the high-pressure air in the groove is perpendicular to the direction of vibration of the high-pressure air, and both walls of the outlet in the direction of vibration of the high-pressure air The airflow blowing device according to claim 8, wherein the airflow blowing device is a substantially triangular prism having two sides substantially parallel to each other. 2. The airflow blowing device according to claim 1, wherein the vortex control means is a yarn material provided substantially perpendicularly to the jet direction of the high-pressure air at the outlet port. The airflow blowing device according to claim 15, wherein the installation direction of the yarn material is parallel to the vibration direction of the high-pressure air. The airflow blowing device according to claim 15, wherein the installation direction of the yarn material is perpendicular to the vibration direction of the high-pressure air. The airflow blowing device according to any one of claims 15 to 17, wherein the yarn material is an inorganic material. The airflow blowing device according to any one of claims 15 to 17, wherein the material of the yarn material is resin. The airflow blowing device according to any one of claims 15 to 17, wherein a material of the thread material is a metal. 21. The airflow blowing device according to any one of claims 15 to 20, wherein the thread material can be removed. The airflow blowing device according to any one of claims 15 to 21, wherein a thread material is fixed to a thread material installation member, and the thread material installation member is detachably provided. 23. 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 22 that blows high pressure air toward the hand drying chamber, and a high pressure that supplies high pressure air to the air flow blowing device. A hand dryer provided with an air generator. The hand dryer according to claim 23, wherein the thread material has a thickness such that a projected sectional area of the thread material is 0.1% to 10% of a sectional area of the outlet.

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