JP3153840B2 - Hand drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand drying apparatus for sanitarily drying wet hands after washing.

[0002]

2. Description of the Related Art In order to maintain hands in a sanitary condition, it is necessary to perform not only washing of hands but also drying treatment after washing in a sanitary manner. For this reason, wet hands are directly dried by washing or the like. For example, a hand drying device as disclosed in Japanese Patent Application Laid-Open No. 23939/1990 is employed.

[0003] The conventional hand drying apparatus disclosed in the above publication is configured by providing a heating means by an electric heater to a blowing means rotated by an induction motor. The blowing means forms an air flow to be blown out to the hand drying section by the rotation of the sirocco-type blades, and the electric heater heats the air flow formed by the blowing means to make the air flow blown out to the hand drying section hot air.

[0004] In the hand drying apparatus having the above-mentioned structure, hands can be dried hygienically by holding a wet hand over a hand drying section from which hot air is blowing. That is, the moisture of the hand hitting the hot air evaporates due to the heat, is blown off by the wind, and is removed from the hand without wiping with a woven cloth or the like.

[0005]

In the above-described conventional hand drying apparatus, the temperature of the hot air is set to be relatively low because hot air is directly applied to the hands. For this reason, the drying process takes a considerable amount of time, and is cumbersome to use.

[0006] Further, since the hand drying section is a hot-air blowing section and the surrounding area is open, when the hand is put out toward the hand drying section, the moisture of the hand evaporated together with the hot air is blown toward the user. May cause discomfort during use.

[0007] The above-mentioned inconvenience can be solved by providing a barrier in the hand drying section or enclosing a part of the hand drying part, but the usability is deteriorated due to the barrier, and moisture due to drying processing is accumulated in the enclosure. A new problem arises. In addition, putting a hand, which is a part of the body, in the obstructive part and performing the drying treatment in a state in which it is difficult to see, tends to have a physiological anxiety and is difficult to use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The first object of the present invention is to provide a hand-drying method that can quickly and sanitarily perform a hand-drying process by spraying air. Second, it is to improve the noise caused by the injection of the high-speed air flow.

[0009]

Means for Solving the Problems] To solve the above problems
The invention according to claim 1 is characterized in that the inlet and the side face are open, and the hand insertion portion having a size capable of accommodating the hand is provided on the opposite surface of the hand insertion portion by a high-pressure air flow generating device for generating a high-speed air flow.
High-speed air flow from the nozzles respectively arranged above the hand
And the hand drying device, which is ejected from below,
The air outlet portion of the nozzle for jetting a high-speed air stream, and the first nozzle hole rows arranged in the lateral direction of the hand insertion portion, arranged on the inlet side of the first nozzle row of holes by retainer insertion portion from 2
The means constituted by the nozzle hole row of the above is adopted .

[0010] In order to solve the above problems, the invention of claim 2 is provided.
Is the empty space of the upper nozzle in the means according to claim 1.
The ridge lines are divided into the first nozzle hole row side and the second nozzle hole inside the air blowout portion to diverge the air flows respectively pressure-fed to the first nozzle hole row side and the second nozzle hole row side. Row side and
With a triangular cross-section shunt structure located in the middle of
Is adopted .

[0011] To solve the above-mentioned problems, the invention according to claim 3 is provided.
Is to have a breadth of inlet and side can hold an open hand
That, in the hand insertion portion provided with a drain outlet on the side nearer the bottom of the hand insertion portion by the high-pressure air flow generation device for generating high-speed air stream
High-speed vacancy from nozzles located on the upper and lower surfaces facing each other
For hand drying apparatus in which jetting air flow, the air outlet portion of the nozzle, thereby constituting a nozzle hole rows arranged in the lateral direction of the hand insertion unit, respectively, a nozzle hole row of at least the upper nozzle, the blown-out air volume There is no deviation configuration with deviation or deviation of the blowing angle , and this deviation configuration
The water in the hand insertion section drains due to
A means to be guided to the side is adopted .

In order to solve the above-mentioned problem, the invention of claim 4 is provided.
Is the hand insertion unit inlet and side have a breadth which can hold an open hand, nozzles <br/> respectively disposed opposing surfaces of the hand insertion portion by the high-pressure air flow generation device for generating high-speed air stream Hand drying device that blows high-speed airflow from the
In addition , the air blowing portion of each nozzle is configured as a nozzle hole row in which small holes are linearly arranged in the left and right direction in the hand insertion portion, and the pitch between small holes in one part of the nozzle hole row of the nozzle is larger than that in the other part. Use a means to provide a large breath part
You .

[0013]

According to the first aspect of the present invention, by adopting the above-mentioned means , a high-speed air flow generated by the high-pressure air flow generator is jetted from the nozzle into the hand insertion portion and wets the hand insertion portion. Moisture adhering to the hand is blown away from the hand by the high-speed airflow just by inserting the hand. At this time, when water is blown off from the hand in the hand insertion portion, some water may also scatter to the inlet side of the hand insertion portion, but this may be caused by the high-speed air flow ejected from the second row of nozzle holes on the upper side. It hampered the course by, not facing the hand insertion portion
Will not reach the user's face .

[0014] By adopting the above means, a second aspect of the present invention is provided.
In the invention of the above, together with the operation according to claim 1,
The air flow that is internally pressure-fed to the first nozzle hole row side and the second nozzle hole row side splits smoothly, and the flow is divided into the first nozzle hole row side and the second nozzle hole row side. The generation of turbulence in the air is avoided.

According to the third aspect of the present invention, the above means is adopted.
In the invention of the present invention , the high-speed airflow generated by the high-pressure airflow generator is ejected from the nozzle into the hand insertion portion, and the moisture adhering to the hand is removed at high speed simply by inserting the wet hand over the hand insertion portion. It will be blown away from the hand by the air flow. Then, the blown water is guided to the drain port provided near the side of the hand insertion portion due to the deviation of the blowing amount of the high-speed air flow or the deviation of the blowing angle.

According to the fourth aspect of the present invention, the above means is adopted.
In the invention of the present invention , the high-speed airflow generated by the high-pressure airflow generator is ejected from the nozzle into the hand insertion portion, and the moisture adhering to the hand is removed at high speed simply by inserting the wet hand over the hand insertion portion. It will be blown away from the hand by the air flow. The high-speed airflow that blows off water from the hand is opposite and collides at the middle part, which generates a continuous low-frequency sound.However, by setting a breath part with a large pitch between small holes on one side , A part corresponding to breathing is created in the collision part, the sound quality of low frequency sound due to the collision changes,
There will be no continuity.

[0017]

【Example】

 Embodiment 1 FIG.

FIG. 1 is a sectional view showing the entirety of a hand drying apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged front view showing one of its constituent members, and FIG. It is a longitudinal cross-sectional view. As shown in FIG.
A high-pressure airflow generator 3 is incorporated in a box 2 forming an outer shell having a hand insertion portion 1 in the upper front part, and high-pressure air generated by the high-pressure airflow generation device 3 is sent to the hand insertion portion 1. It forms a high-speed wind as a working airflow for drying sufficient to blow off moisture into the hand insertion section 1, and is installed on a floor or a wall surface of a hand washing room or the like.

The front of the box 2 forming the outer shell of the hand dryer is constituted by a front panel and an insertion panel forming the hand insertion section 1, and the back is constituted by a back plate. Further, both side surfaces of the box 2 are constituted by left and right side plates, the upper surface is constituted by an upper panel, and the bottom is constituted by a gate-shaped frame 4.

Hand insertion part 1 formed by insertion part panel
Is the upper front portion of the box body 2, to open the inlet and both side surfaces of the front side, is configured as an oblique U-shaped recess for the lower inclined toward the rear side, discomfort in the state in which held out aligned hands naturally It has a frontage, a height and a depth that allows the hands to be freely inserted and removed in a visible state without giving a sense of anxiety, and a drain port 5 is formed near the side of the bottom part on the back side. The inner part of the hand insertion part 1 is wider than the entrance part. In addition, the edge of the opening of the hand insertion portion 1 is formed into a smooth R shape in order to improve the feel, and the inner surface of the hand insertion portion 1 is subjected to a water-repellent treatment by applying a water-repellent paint to prevent the adhesion of water droplets. Dirt is prevented from adhering.

The hand insertion portion 1 is located at the entrance side and the back side of the hand insertion portion 1.
The sensor which detects the hand in and out of is installed. This sensor has a plurality of photo LEs arranged side by side.
D, etc., and is constituted by an infrared light receiving element such as a plurality of phototransistors arranged side by side,
The light emitting side is attached to the lower side wall surface, and the light receiving side is attached to the upper side wall surface which is less affected by external light.

The high-pressure air flow generator 3 includes a DC brushless motor (which may be a normal commutator motor) and a DC brushless motor.
The unit is configured as a unit composed of a turbo fan rotated by a brushless motor. In this embodiment, the unit is attached to the upper surface of the frame 4 constituting the bottom of the box 2 with the suction port 6 facing downward. The suction port 6 of the high-pressure air flow generator 3 is open to the terminal structure of the suction path formed in the frame 4. The suction path is a series of air passages having a suction port 7 opened downward at the bottom of the box body 2 outside the machine as an inlet end, and a suction box 8 facing the suction port 6 of the high-pressure air flow generator 3 as a terminal structure. , Intake port 7 and intake box 8
Is formed by a duct 9 arranged in the vertical direction.

The suction box 8 in the suction path is attached to the lower surface of the upper surface of the frame 4 from below, and forms a chamber 10 as an air inlet to the high-pressure air flow generator 3 together with the upper surface of the frame 4. . A sound absorbing pad 11 made of a urethane platform or the like is adhered to the inner surface of the intake box 8, and a mechanical operation sound and an air current operation sound accompanying the operation of the high-pressure air flow generator 3 are absorbed and attenuated. In addition, a suction port 7 opened downward to the outside at the bottom of the box 2 in the suction path.
Is provided with a filter 14 in which a filter material 13 made of a mesh, a polymer nonwoven fabric, or the like is stretched in a frame of a resin frame 12 such that the filter 14 can be inserted and removed in a horizontal direction or a vertical direction, and can be detachably attached and detached.

Each D on the exhaust side of the high-pressure air flow generator 3
One end of each of the upper air duct 16 and the lower air duct 17 is connected to the C brushless motor side. The other ends of the upper air duct 16 and the lower air duct 17 open in a flat trumpet shape, and an upper outlet nozzle 18 and a lower outlet nozzle 19 are attached to a horizontally elongated slit-shaped opening end, respectively. An air blowing portion having a nozzle hole row 27 in which a plurality of small holes 26 which are a plurality of nozzle holes are arranged at equal pitches in the lateral direction is formed in the upper blowing nozzle 18 and the lower blowing nozzle 19,
The high pressure air sent from the high pressure air flow generator 3 is
m / s can be converted into a wind having a wind speed of 150 m / s and blown out.

The upper blowing nozzle 18 is inclined downward at the upper part of the inlet of the hand insertion part 1, and the lower blowing nozzle 19 is inclined downward at the lower part of the inlet of the hand inserting part 1 so as to form a pressure gradient from the inlet to the back. It is possible to simultaneously apply wind to both the back and palm sides of the hand so that water drops on the hand can be removed from the front and back of the hand without rubbing the hands inserted in the hand insertion section 1 with the hand. it can.

In the air blowing portion of the upper blowing nozzle 18, in addition to the above-described nozzle hole row 27 arranged in the left-right direction in the hand insertion section 1, a second nozzle hole row 28 which is a first nozzle hole row 27 is provided. Are provided as shown in FIG. The second nozzle hole row 28 is formed as a hole row in which the pitch between the small holes is slightly larger than the former at the center and directly above the first nozzle hole row 27 in parallel with the first nozzle hole row 27. Blowing direction of the second nozzle row of holes 28, no inclination as shown in different views 3 from the first nozzle row of holes 27, that looks like it is blown out laterally at a high speed air stream.

A circuit box 20 and a drain tank 21 as well as a high-pressure air flow generating device 3 and an intake box 8 are detachably mounted on a frame 4 constituting the bottom of the box body 2 in a shelf-like manner. ing. The other end of a drain hose 22 having one end connected to a drain port 5 formed at the deepest part of the hand insertion portion 1 on the back side is connected to the drain tank 21 so as to be able to conduct water.
Water flowing down from the hand insertion section 1 can be stored.

In the hand drying apparatus having the above-described structure, when the wet hand is put into the hand insertion portion 1, the moisture of the hand is removed by the high-speed wind generated in the hand insertion portion 1. It can be blown off to the side and can be quickly dried in a visible state that does not cause anxiety in the hands.

That is, when a wet hand is inserted into the hand insertion portion 1 and both the entrance and rear sensors are interrupted by the hand, a hand detection signal is formed, and the control circuit detects the D of the high-pressure airflow generator 3.
The C brushless motor starts, and the turbo fan rotates. By the rotation of the turbo fan, the box 2 passes through the suction path
Air from the outside of the apparatus is sucked into the high-pressure air flow generating device 3 from the bottom side of the apparatus to form high-pressure air. The high-pressure air is cleaned by removing dust from the filter 14 and added with a fragrance. The high-pressure air is sent from the exhaust side of the high-pressure air flow generator 3 into the upper air duct 16 and the lower air duct 17, and is inserted into the hand insertion portion. A high-speed wind is simultaneously blown from both the upper blowing nozzle 18 and the lower blowing nozzle 19 to both the back of the hand and the palm of the hand at a predetermined inclination. The water droplets of the hand are blown off at once by the clean and high-speed wind toward the back side of the hand insertion portion 1, and the processed wind is discharged outside from both sides of the hand insertion portion 1.

The water droplets blown off are pushed to the inner bottom end of the hand insertion portion 1 by both the weight of the water and the force of the wind, and flow down to the drain hose 22 from the drain port 5 formed in this portion. It is drained smoothly from the inside of the part 1 sequentially. The water flowing down the drain hose 22 is received by the drain tank 21.

Thus, the wet hands are dried in about 5 seconds. Thereafter, when the hand inserted into the hand insertion unit 1 is removed from the hand insertion unit 1, the absence of the hand is detected, and the high-pressure air flow generator 3 is stopped after the operation for a certain period of time. Is completed. That is, according to this hand drying device, sanitary and comfortable hand drying can be easily and quickly performed with clean air from the outside through the filter 14 without any trouble, trouble, discomfort or anxiety. Processing can be performed.

At the time of the drying treatment, water adhering to the hand is blown off one by one when it is hit by a high-speed air flow. The detailed movement of the water during this time is rather complicated, and the sprayed water in the form of mist is slightly complicated. Some of them are blown back to the entrance side of the hand insertion unit 1, and may be blown back to the user's face or the like. However, in this embodiment, the second
The airflow blown laterally from the nozzle hole row 28 is
Hampered the path of blowback caused by the first nozzle row of holes 27, so can not be blown back in to the outside of the balloon air flow of the second nozzle row of holes 28, the orientation in the hand insertion portion 1
Reappearing on the face where the matching user is particularly discomfort
No, a comfortable feeling is obtained .

As described above, the core of the function of the hand dryer is the upper blowing nozzle 18 and the lower blowing nozzle 1.
9 is a high-speed airflow blown out from the nozzle 9. Therefore, the displacement or change in the blowing direction largely affects the function, so that the upper blowing nozzle 18 or the lower blowing nozzle 19 to which the deformation stress of the upper air duct 16 or the lower air duct 17 is applied as shown in FIG. It is preferable to adopt a configuration in which a rib 29 is provided inside to prevent deformation.

Embodiment 2 FIG. FIG. 5 is a sectional view of a nozzle in a hand dryer according to another embodiment of the present invention. The basic configuration of the hand drying device of this embodiment is the same as that of the first embodiment. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals.

The feature of this hand drying device is the internal structure of the air blowing portion of the upper blowing nozzle 18 (which may be a lower blowing nozzle) having the first and second nozzle hole rows 27 and 28. That is, as shown in FIG. 5, a diversion structure 30 having a triangular cross section is formed so that the air flow fed under pressure is smoothly divided into the first nozzle hole row 27 side and the second nozzle hole row 28 side. It was done. The branch structure 30 is provided such that the ridge line is located on the upstream side in the middle between the first nozzle hole row 27 side and the second nozzle hole row 28 side. As a result, the branch flow to the first nozzle hole row 27 side and the second nozzle hole row 28 side becomes smooth, and the occurrence of turbulent flow in this portion is avoided. The other configurations and functions are the same as those of the first embodiment, and the description thereof will be omitted.

Embodiment 3 FIG. FIG. 6 is a front view of a nozzle in a hand dryer according to another embodiment of the present invention. The basic configuration of the hand drying device of this embodiment is the same as that of the first embodiment. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals.

The feature of this hand dryer is in the configuration of the nozzle hole array 27 itself of the air blowing portion of the upper blowing nozzle 18 (in some cases, the lower blowing nozzle). That is, FIG.
As shown in (1), the amount of air blown out at the portion corresponding to the drain port 5 provided at a position close to the side surface of the hand insertion portion 1 of the first nozzle hole row 27 is made smaller than the other portions by the pitch between small holes. Is attached. Since the hand insertion portion 1 is open on both sides, the blown air flow escapes from the side to the outside. Accordingly, the drain port 5 is provided not on the center but on the side so as to be able to drain using the airflow. However, the drainage using the airflow is further improved by positively creating a bias in the amount of the blown air. Thus, the drainage of water in the hand insertion portion 1 becomes extremely smooth. In this sense, although not shown, the blowing angle may be biased, and a method of obtaining a bias in the air flow by the diameter of the small hole 26 is also effective. The other configurations and functions are the same as those of the first embodiment, and thus description thereof will be omitted.

Embodiment 4 FIG. FIG. 7 is a front view of a nozzle in a hand dryer according to another embodiment of the present invention. The basic configuration of the hand drying device of this embodiment is the same as that of the first embodiment. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals.

The feature of this hand dryer is in the configuration of the nozzle hole array 27 itself of the air blowing portion of the upper blowing nozzle 18 (or the lower blowing nozzle). That is, as shown in FIG. 7, in some parts of the first nozzle hole row 27, several (two in the figure) breath portions 32 in which the pitch between small holes is larger than the other parts.
Is set. The breath part 32 is a small hole 2 of the part.
6 can be formed by closing one of them, which is practical in practice. Since the position setting of the breath part 32 is related to the box body 2 and other components, an empirical method of estimating a certain position and actually closing the small hole 26 of the part is suitable. .

That is, the high-speed airflow that blows off water from the hand collides at the middle part because it is opposed, and generates a continuous and unpleasant low-frequency sound such as a boon. For the purpose of changing the sound quality of this low-frequency sound to a sound that is not harsh and breaking the continuity of the sound, it is best to set the breath part 32 empirically by repeating measurement and verification. Become. This embodiment is an example in which the unpleasant low-frequency sound and the continuity are eliminated by closing the tenth small hole 26 from both ends in the manner described above. The effect of the breath portion 32 on low-frequency sound is obtained because a portion corresponding to breathing is formed in a collision portion between high-speed airflows. The other configurations and functions are the same as those of the first embodiment, and the description thereof will be omitted.

[0041]

As is apparent from the above description of the embodiment, according to the first aspect of the present invention, the high-speed air flow generated by the high-pressure air flow generator is ejected from the nozzle into the hand insertion portion, and Moisture attached to the hand is blown away from the hand by a high-speed air flow just by inserting a wet hand over the hand, sanitary, easy and quick without any hassle, trouble, discomfort or anxiety A suitable and comfortable hand drying process can be performed. In particular, when water is blown off from the hand in the hand insertion portion, the hand insertion portion does not return to the entrance side, and does not return to the user's face or the like.
The feeling of use is further improved.

According to the second aspect of the present invention, together with the effect of the first aspect, the air flow internally pressure-fed to the first nozzle hole row side and the second nozzle hole row side is diverted smoothly. Since turbulence is prevented from being generated at the branching portion between the first nozzle hole row side and the second nozzle hole row side, pressure loss is reduced and air noise is also reduced.

According to the third aspect of the present invention, the high-speed airflow generated by the high-pressure airflow generator is ejected from the nozzle into the hand insertion portion, and the hand is simply inserted into the hand insertion portion so as to hold the wet hand. Moisture adhering to the hand is blown off from the hand by the high-speed air flow, and it is possible to perform a hygienic and comfortable hand drying process easily and quickly without any hassle, trouble, discomfort or anxiety. . In particular, the water blown from the hand is led to the drain port provided near the side of the hand insertion portion due to the bias of the high-speed air flow, and the drainage property is improved.

According to the fourth aspect of the present invention, the high-speed airflow generated by the high-pressure airflow generator is ejected from the nozzle into the hand insertion portion, and the hand is simply inserted into the hand insertion portion with a wet hand. Moisture adhering to the hand is blown off from the hand by the high-speed air flow, and it is possible to perform a hygienic and comfortable hand drying process easily and quickly without any hassle, trouble, discomfort or anxiety. . In particular, continuous and unpleasant low-frequency sound generation due to the collision of a high-speed air stream that blows water from the hand can be prevented by changing the sound quality and eliminating the continuity.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a hand dryer according to one embodiment of the present invention.

FIG. 2 is a front view showing an upper blowing nozzle of the hand drying device of FIG. 1;

FIG. 3 is a longitudinal sectional view showing an upper blowing nozzle of the hand drying device of FIG. 1;

FIG. 4 is a rear view showing another embodiment of the upper blowing nozzle.

FIG. 5 is a longitudinal sectional view showing an upper blowing nozzle in a hand dryer according to another embodiment of the present invention.

FIG. 6 is a front view showing an upper blowing nozzle in a hand dryer according to another embodiment of the present invention.

FIG. 7 is a front view showing an upper blowing nozzle in a hand dryer according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hand insertion part 2 Box 3 High-pressure air flow generator 18 Upper blowing nozzle 19 Lower blowing nozzle 26 Small hole 27 Nozzle hole row 28 Second nozzle hole row 30 Split flow structure 31 Unevenness 32 Breath part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomohiko Horii 1-3-3 Komabacho, Nakatsugawa City, Gifu Prefecture Mitsubishi Electric Corporation Nakatsugawa Works (72) Inventor Kazuhiko Hotta 1-3-3 Komabacho, Nakatsugawa City, Gifu Mitsubishi (56) References JP-A-3-82419 (JP, A) JP-A-5-293055 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47K 10/48

Claims (4)

(57) [Claims] 1. A inlet and side open, the hand insertion portion having a breadth that can hold a hand, respectively arranged in pairs towards the surface of the hand insertion portion by the high-pressure air flow generation device for generating a high-speed air stream an upper relative hand high velocity air stream from the nozzles
A hand drying apparatus configured to be ejected from the lower side, fast sky
The air blowing part of the nozzle that blows out the airflow from above ,
A first nozzle hole array arranged in the left-right direction in the hand insertion portion, and a second nozzle hole array disposed on the inlet side of the hand insertion portion with respect to the first nozzle hole array. And hand drying equipment. 2. The first ridge line, which divides the air flows pressure-fed to the first nozzle hole row side and the second nozzle hole row side, respectively, inside the air blowing portion of the upper nozzle . No
A break located midway between the nozzle hole row side and the second nozzle hole row side
The hand drying device according to claim 1, wherein the hand drying device has a triangular surface flow dividing structure. Wherein the inlet and side to have a size capable of accommodating an open hand, the manual insertion portion provided with a drain outlet on the side nearer the bottom, the high pressure air flow generation device for generating a high-speed air stream a hand dryer configurations for jetting a high-speed air flow from nozzles disposed respectively on upper and lower surfaces of the pair towards the hand insertion portion, an air outlet portion of each nozzle, in the horizontal direction in each of the above hand insertion portion The nozzle hole array of at least the upper nozzle is configured as a row of nozzle holes arranged side by side, and the nozzle hole row of the upper side nozzle has a deviation configuration having a bias of the blowout air volume or a bias of the blowout angle. Wherein the water is guided to the drain port side. Wherein the inlet and side open, the hand insertion portion having a breadth that can hold a hand, respectively arranged in pairs towards the surface of the hand insertion portion by the high-pressure air flow generation device for generating high-speed air stream A hand drying device configured to eject a high-speed airflow from the nozzles, wherein the air blowing portion of each of the nozzles is configured as a nozzle hole row in which small holes are linearly arranged in the left and right direction in the hand insertion portion, A hand-drying device, characterized in that a breath portion having a larger pitch between small holes is provided in a part of the nozzle hole row of one of the nozzles.