JP7348339B2 - air shower device - Google Patents

Description

The present invention relates to a hand dryer, an air shower device, and a pass box equipped with an air blowing device that blows air onto an object to dry the object or blow away dust attached to the object to remove dust.

Manufacturing equipment for producing semiconductors, electronic components, etc. is installed in a clean room where a clean atmosphere is maintained. In order to maintain the cleanliness of the air within the clean room, an air shower device is sometimes provided at the entrance of the clean room. An air shower device is provided to remove dust attached to the clothes of workers entering a clean room and dust attached to the surfaces of objects such as workpieces and equipment by blowing air (air shower).
As an example of such an air shower device, one described in Patent Document 1 is known. This air shower device is a dust removal and sterilization device that is installed on the entrance side of a clean room and removes dust and sterilizes objects to be processed (articles) entering the clean room by passing them through the air shower device. This dust removal/sterilization device includes an air jetting means for jetting air and a spraying means for spraying a sterilizing solution, and after removing dust from the object to be treated with the jetted air, the sprayed sterilizing device The object to be treated is sterilized by the liquid. When removing dust, an air nozzle is provided on the side wall of the air shower room, and air is blown onto the object to be processed from this air nozzle.

Before entering the clean room, participants change clothes and wash their hands in a semi-clean room. A hand dryer is often used to dry hands after washing to prevent recontamination. A typical hand dryer uses a high-speed airflow from a blow-off nozzle to blow away water droplets on your hands, allowing you to dry your hands quickly and without contact.
As an example of such a hand dryer, the one described in Patent Document 2 is known. This hand dryer has a hand drying chamber that communicates with the outside through the hand insertion hole inside the main body case, which has a hand insertion hole at the top. Air blowing nozzles that blow air in directions that intersect with each other are arranged opposite to each other.

In addition, in order to prevent dust from entering the clean room when goods are being carried in and out of the clean room, a pass box is installed on the wall that shields the clean room from the outside. We carry out the loading and unloading of items.
As an example of such a pass box, the one described in Patent Document 3 is known. This pass box is equipped with a nozzle and blower, and by spraying clean air with high-speed jet air, it forcibly removes dust adhering to the items carried into the pass box. It is supposed to be removed.

Japanese Patent Application Publication No. 2010-203756 Japanese Patent Application Publication No. 2004-236714 Japanese Patent Application Publication No. 2009-236354

However, in the conventional air shower device and pass box mentioned above, even when air is blown onto the article from the air nozzle to remove dust, some of the dust attached to the article is not blown away and remains on the surface of the article. There is a possibility that
In addition, with the conventional hand dryer described above, even when air is blown onto the hand from the air nozzle for drying, there is a risk that some of the moisture on the hand may not be blown away and may remain on the surface of the hand. .

The present invention has been made in view of the above circumstances, and includes a hand dryer equipped with an air blowing device that can reliably blow off dust or moisture attached to an object to remove dust or dry it by blowing air onto the object. The purpose is to provide air shower equipment and pass boxes.

In order to achieve the above object, the hand dryer of the present invention is a hand dryer equipped with an air blowing device that blows air,
The air blowing device includes a pair of blowing nozzles that are spaced parallel to each other and into which a human hand is inserted;
The blowing nozzle extends along a direction intersecting the insertion direction of the hand, and blows air to the hand,
It is characterized in that the blowing angle θ of the air blown out from the blowing nozzle is set to 0° to 35°.
However, the blowing angle θ of the air is defined by an imaginary airflow line of the blowing air blown from the blowing nozzle toward the hand side and toward the hand insertion direction, and a vertical imaginary line perpendicular to the hand insertion direction. It is the angle made with the line.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown from the blowing nozzle will be on the opposite side of the hand insertion direction, that is, on the finger side. This is because the water on the fingers is less likely to be blown away, and the water blown off from both sides of the hand is more likely to scatter as water droplets on the outside of the hand dryer. This is because if the angle exceeds 35°, it becomes difficult to blow away the moisture on the hands.
When the air blowing angle θ is between 0° and 35°, the air blown from the pair of blowing nozzles hits both sides of the hand (palm surface and back surface), and the air pulsates along both sides of the hand due to the Coanda effect. As the water flows as you hit, this air blows away the moisture on both sides of your hands.
In addition, on the sides of the hand that are approximately perpendicular to both sides, the air blown out from the pair of blowout nozzles collides with each other, and on the sides of the hand, the air flows in pulsations along the sides of the hand due to the Coanda effect. This air blows away moisture adhering to the sides of the hand.
Furthermore, as the air blowing angle θ becomes smaller, a portion of the air blown from the blowing nozzle flows toward the wrist, making it difficult to blow away the moisture from the fingers, while at the same time making it easier to blow away the moisture adhering to the surface of the hand. Therefore, the air blowing angle θ is set in consideration of these points.
Further, the lengthwise dimension of the blowout nozzle is longer than the widthwise dimension of the surface of the hand (palm surface and back surface), and the length is such that both ends of the blowout nozzle protrude from the surface of the hand in the width direction. is preferred.

In the present invention, since the blowing angle θ of the air blown from the blowing nozzle is set to 0° to 35°, the moisture attached to the hands can be blown off and the hands can be reliably dried.

Further, the air shower device according to the present invention is an air shower device equipped with an air blowing device that blows air,
The air blowing device includes a pair of blowing nozzles that are spaced parallel to each other and into which a person enters,
The blowing nozzle extends along a direction intersecting the direction of entry of the person, and blows air to the person,
It is characterized in that the blowing angle θ of the air blown out from the blowing nozzle is set to 0° to 35°.
However, the blowing angle θ of the air is perpendicular to the imaginary airflow line of the blowing air blown from the blowing nozzle toward the person and toward the opposite side to the direction in which the person approaches. It is the angle made with the vertical imaginary line.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown out from the blowing nozzle will go in the direction of the person's approach. This is because there is a risk that the dust blown off the person's clothing may enter the clean room, etc. in front of the person in the direction of entry, and if θ exceeds 35°, the dust attached to the person's clothes will be difficult to blow away. Because it will be.
When the air blowing angle θ is 0° to 35°, the air blown from the pair of left and right blowing nozzles hits the opposite surfaces (front and back) of the person, and the Coanda effect causes the air to flow along both surfaces of the person. Since the air flows in a pulsating manner, this air blows away the dust attached to both surfaces of the human body and removes the dust.
In addition, on the upper surface of the shoulders and the upper surface of the head, which are approximately perpendicular to the human surface, the air blown out from the pair of blowing nozzles collides with each other, and the air is dispersed due to the Coanda effect on the upper surface of the human shoulder and the upper surface of the head. Since the air flows in a pulsating manner along the upper surface of a person's shoulders and head, the dust adhering to the upper surface of the person's shoulders and head is blown away.
Furthermore, the smaller the air blowing angle θ, the easier it is to blow off the dust adhering to the person's surface. The blowing angle θ is set in consideration of these points.

Further, it is preferable that the vertical dimension of the blowing nozzle is longer than the downward dimension of a human being, the upper end of the blowing nozzle is higher than the human head, and the lower end of the blowing nozzle is lower than the tip of the human foot.

In the present invention, the blowing angle θ of the air blown out from the blowing nozzle is set to 0° to 35°, so that the dust attached to the person (his/her clothes) can be blown off and removed reliably.

Further, the pass box according to the present invention is a pass box equipped with an air blowing device that blows air,
The air blowing device includes a pair of blowing nozzles that are arranged parallel to each other and into which the article enters,
The blowing nozzle extends along a direction intersecting the direction of entry of the article, and blows air onto the article,
It is characterized in that the blowing angle θ of the air blown out from the blowing nozzle is set to 0° to 35°.
However, the blowing angle θ of the air is perpendicular to the imaginary airflow line of the blowing air blown from the blowing nozzle toward the article and toward the opposite side of the article's approach direction, and the article's approach direction. It is the angle made with the vertical imaginary line.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown from the blowing nozzle will go in the direction of the article. This is because there is a possibility that the dust attached to the article may enter a clean room or the like located in front of the article in the entry direction, and if θ exceeds 35 degrees, it becomes difficult to blow off the dust attached to the article.
When the air blowing angle θ is 0° to 35°, the air blown from the left and right pair of blowing nozzles hits the opposing surfaces (both sides) of the article, and the Coanda effect causes the air to flow along both sides of the article. Since the air flows in a pulsating manner, dust adhering to both sides of the article is blown off and removed.
Furthermore, on the upper and lower surfaces of the article, the air blown from the pair of blowing nozzles collides with each other, and on the upper and lower surfaces of the article, the air pulsates along the upper and lower surfaces of the article B due to the Coanda effect. As the air flows, dust adhering to the top and bottom surfaces of the article is blown away.
Furthermore, the smaller the air blowing angle, the easier it is to blow off the dust adhering to the surface of the item. The blowing angle θ is set in consideration of these points.

Further, it is preferable that the vertical dimension of the blowing nozzle is longer than the vertical dimension of the article, the upper end of the blowing nozzle is higher than the upper surface of the object, and the lower end of the blowing nozzle is lower than the lower surface of the object.

In the present invention, since the blowing angle θ of the air blown from the blowing nozzle is set to 0° to 35°, the dust attached to the article can be blown off to ensure dust removal.

According to the present invention, by blowing air onto an object (hand, person, article), moisture or dust attached to the object can be reliably blown away to remove dust or dry it.

1 shows a hand dryer according to a first embodiment of the present invention, in which (a) is a side view of the hand dryer, and (b) is a front view of the hand dryer. FIG. 6 is a diagram for explaining the direction of air blowing out. It shows an air shower device according to a second embodiment of the present invention, in which (a) is a side sectional view of the air shower device, and (b) is a front view of the air shower device. FIG. 2 is a plan view of the air shower device. FIG. 6 is a diagram for explaining the direction of air blowing out. It shows a pass box element according to a third embodiment of the present invention, in which (a) is a side sectional view of the pass box, and (b) is a front view of the pass box. It is a top view of the same pass box. FIG. 6 is a diagram for explaining the direction of air blowing out.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 and 2 show an embodiment of a hand dryer according to the present invention. FIG. 1(a) is a side view of the hand dryer, FIG. 1(b) is a front view thereof, and FIG. 2 shows the direction of air blowing. It is a figure for explaining.

As shown in FIGS. 1 and 2, the hand dryer 10 of this embodiment includes a case 11 and an air blowing device 20 provided inside the case 11.
The case 11 is formed into a rectangular box shape, and a sink 12 is housed inside the case 11. The case 11 includes a case body 11a that accommodates the sink 12, and an upper cover 11b that is removably attached to the upper opening of the case body 11a.
The upper cover 11b is provided with a hand insertion opening 11c that opens above the sink 12. The hand insertion port 11c is a horizontally long rectangular opening, as shown in FIG. 1(b).

The sink 12 is formed into a rectangular box shape, and has an opening at the top. A hand insertion port 11c is arranged above this opening, and the sink 12 communicates with the outside through the opening and the hand insertion port 11c. A drain port 16 is provided vertically on the bottom wall of the sink 12, and a drain pipe 17 is connected to the drain port 16, which extends toward a lower drain pan provided at the bottom of the case body 1a.
Further, an automatic water faucet 18 is provided on the upper surface side and the rear side of the sink 12, and a water supply pipe 18a is connected to this automatic water faucet 18. This filter 18b is connected to the water supply.
Furthermore, a germicidal lamp 19 is provided on the inside upper part of the case 11, and the germicidal lamp 19 can sterilize germs on the hands.

The air blowing device 20 is provided inside the case 11. This air blowing device includes a pair of upper and lower blowing nozzles 21, 21, and an air supply section 22 that supplies air to the blowing nozzles 21, 21.

The air supply section 22 includes a blower 23. The blower 23 is provided inside a casing 24 provided at the bottom of the case body 1a. The front surface (left side in FIG. 1(b)) of the casing 24 is open, and a pre-filter 25 made of nonwoven fabric or the like is provided in this opening. Further, the rear surface of the casing 24 (the right surface in FIG. 1(b)) is open, and the HEPA filter 26 is provided in this opening.
Further, an air flow passage 27 is provided on the right side of the case 1 and extends vertically, and the upper end of the air flow passage 27 and the ends of the spray nozzles 21, 21 are connected to allow air circulation. has been done. Further, the lower end of the airflow passage 27 and the opening on the rear side of the casing 24 are connected to allow air to flow.
In the air supply unit 22 having such a configuration, when the blower 23 is activated, the air inside the case 11 is sucked into the casing 24 through the pre-filter 25, and the air is then sucked into the casing 24 through the HEPA filter 26. is supplied to the air flow passage 27. The air supplied to the air flow passage 27 becomes clean air with foreign matter collected by the pre-filter 25 and the HEPA filter 26, and the air flows through the air flow passage 27 and is sent to the blow-off nozzles 21, 21 from the ends thereof. Supplied. The air blown out from the blowout nozzles 21, 21 returns to the lower part through the exhaust port 11d provided on the back side of the case 11, and circulates through the prefilter 25.

The blow-off nozzles 21, 21 are provided on the front of the case 11, extending between the left and right side walls of the case 11, and are configured to blow air from a blow-off port 21a provided on the outer peripheral surface thereof. The blowing nozzles 21, 21 are provided vertically and spaced apart in parallel, and as shown in FIG. 2, a human hand H is inserted between these blowing nozzles 21, 21, and air is blown toward the hand H from above and below. It looks like this. In other words, when the hand H is inserted between the blow-off nozzles 21 and 21 from the hand insertion port 11c (see FIG. 1) with the palm surface facing downward, the blow-off port of the lower blow-off nozzle 21 is inserted toward the palm surface (lower surface). Air is blown out from the air outlet 21a of the upper blowing nozzle 21 toward the back (upper surface) of the hand.

The blow-off nozzles 21, 21 are formed in a cylindrical shape extending in a direction perpendicular to the insertion direction of the hand H (left-right direction in FIG. 2) (direction perpendicular to the plane of paper in FIG. 2), and the outer peripheral surface of the upper blow-off nozzle 21 A slit-shaped outlet 21a extending in the same direction as the extending direction of the blowing nozzle 21 is provided at the lowest part of the blowing nozzle 21, and a slit-shaped blowing outlet 21a extending in the same direction as the extending direction of the blowing nozzle 21 is provided at the top of the outer peripheral surface of the lower blowing nozzle 21. A slit-shaped air outlet 21a extending in the direction is provided.
The blowing angle θ of the air blown out from the blowing outlet 21a of the blowing nozzle 21 is set to 0° to 35°, but may be set to −35° to 35°.
However, the air blowing angle θ is defined by the airflow imaginary line KL1 of the blown air blown from the blowing nozzle 21 towards the hand side and toward the insertion direction of the hand H, and the vertical imaginary line perpendicular to the insertion direction of the hand H. This is the angle formed with line KL2. In this embodiment, the air blowing angle θ is set to about 5°.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown from the blowing nozzle 21 will be on the opposite side to the insertion direction of the hand H. Since the water is directed toward the wrist side opposite to the finger side, the water attached to the fingers is less likely to be blown away, and the water blown off from both sides of the hand is more likely to scatter as water droplets on the outside of the case 11, that is, the hand dryer 10. This is because when θ exceeds 35°, it becomes difficult for the moisture adhering to the hand H to be blown off.
When the air blowing angle θ is 0° to 35°, the air blown from the upper and lower pair of blowing nozzles 21, 21 hits both sides of the hand H (palm surface and back surface), and the air is transferred to the hand H due to the Coanda effect. Since the air flows in a pulsating manner along both sides of the hand H, this air blows away moisture adhering to both sides of the hand H, drying both sides of the hand H.
In addition, on the side surface side that is substantially orthogonal to both surfaces of the hand H, the air blown out from the pair of blowing nozzles 21, 21 collides with each other, and on the side surface of the hand H, the air pulsates along the side surface of the hand H due to the Coanda effect. As it flows while hitting, this air blows away the moisture adhering to the side of the hand H.
Furthermore, as the absolute value of the air blowing angle θ is smaller, a portion of the air blown from the blowing nozzle 21 flows toward the wrist side, making it difficult to blow off moisture from the fingers, while at the same time making it difficult for the water to adhere to the surface of the hand H. Since moisture is easily blown away, the air blowing angle θ is set in consideration of these points.

In addition, the opening width of the outlet 21a of the outlet nozzle 21, that is, the nozzle width w (see FIG. 2) is
It is set between 1mm and 2mm. Here, the nozzle width of the blowout nozzle 21 is set to 1 mm to 2 mm because if the width is less than 1 mm, the amount of air blown out will be small and it will be difficult to obtain the effect of blowing off moisture. This is because the wind speed (blowing speed) becomes low, making it difficult to obtain the effect of blowing away moisture.
In this embodiment, two blow-off ports 21a are provided at predetermined intervals in the longitudinal direction of the blow-off nozzle 21, and the length of each blow-off port 21a is 100 mm.

Further, the blowing speed of the air blown out from the blowing nozzle 21 is set to 100 m/s to 150 m/s.
Here, the blowing speed of the air blown out from the blowing nozzle 21 is set to 100 m/s to 150 m/s because if it is less than 100 m/s, the air blowing speed becomes small and it is difficult to obtain the effect of blowing off moisture. This is because if the speed exceeds 150 m/s, the air blowing speed increases and there is a risk that the blown water will scatter and scatter from the case 11.

In this embodiment, the blow-off nozzle 21 is provided in the case 11 in a fixed state, but the present invention is not limited to this, and the blow-off nozzle 21 may be provided so as to be swingable from side to side. In this case, the air blowing angle θ can be easily set to any angle between 0° and 35°.

As explained above, according to the hand dryer 10 of the present embodiment, the blowing angle θ of the air blowing out from the blowing nozzles 21, 21 is set to 0° to 35°, so that the air does not stick to the hands H. You can reliably blow away any moisture and dry it.
In addition, the blowing nozzle 21 blows out clean air in which foreign matter has been collected by the pre-filter 25 and the HEPA filter 26 of the air supply section 22, so that the blowing air can prevent dust from adhering to the hands H. You can blow out the water from H and dry it.

Furthermore, the nozzle width of the blowout nozzle 21 from which air is blown out is 1 mm to 2 mm, and the blowing speed of the air blown out from the blowout nozzle 21 is 100 m/s to 150 m/s, so that the effect of blowing off moisture by air can be properly achieved. Obtainable.

(Second embodiment)
3 to 5 show an embodiment of the air shower device according to the present invention, FIG. 3(a) is a side sectional view of the air shower device, FIG. 3(b) is a front view thereof, and FIG. 4 is a same plane view. FIGS. 5A and 5B are diagrams for explaining the air blowing direction.

As shown in FIGS. 3 and 4, the air shower device 30 of this embodiment includes a box-shaped main body case 32 and an air blowing device 40 provided inside the main body case 32.
The main body case 32 is provided with partition walls 33, 33 facing each other, and the space between the partition walls 33, 33 forms a shower chamber 34 that penetrates the inside of the main body case 32 from the front side to the back side. Further, an air cleaning chamber 35 is defined between the partition wall 33 and the main body case 32. Doors 36, 36 are provided at both ends of the shower room 34, one of which leads to the outside and the other to the clean room. Then, the person N (see FIG. 5) enters the shower room 34 from the outside by opening one door 36, and the person N enters the clean room from the shower room 34 by opening the other door 36.

The air cleaning chambers 35 are arranged on both sides of the shower chamber 34. That is, the air shower device 30 of this embodiment includes a pair of left and right air cleaning chambers 35, 35.
A pair of left and right blowing nozzles 41, 41 constituting an air blowing device 40 are provided in the air cleaning chambers 35, 35. That is, one of the air purifying chambers 35 is provided with one blowing nozzle 41, and the other air purifying chamber 35 is provided with the other blowing nozzle 41.
The blowout nozzle 41 extends along a direction (vertical direction in FIG. 3, direction perpendicular to the plane of the paper in FIG. 4) that intersects the direction in which the person N passes (left-right direction in FIG. 3(a)), and It is designed to blow air to the person N who is in the room. Further, the spray nozzle 41 is fixed to the partition wall 33 at a central portion thereof in the width direction.

Further, the air purification chamber 35 is provided with an air flow passage 35a extending vertically, and a blower 37 is provided on a wall forming the air flow passage 35a. Furthermore, the air purification chamber 35 and the shower chamber 34 communicate with each other through an opening at their bottoms, and this opening is provided with a suction plate 38 having a large number of suction ports. A pre-filter 39 made of woven fabric or the like is provided.
Further, a main filter 35b is provided at the upper part of the airflow passage 35a, facing the blowing nozzle 41.
Furthermore, the air purification chamber 35 is provided with a partition wall 35c at a position below the main filter 35b, and the air purification chamber 35 is divided into upper and lower sections by the partition wall 35c.

In such an air purification chamber 35, when the blower 37 is started, the air in the shower chamber 34 is sucked in through the suction plate 38, foreign matter such as dust is collected by the pre-filter 39, and then the air flows through the air flow path 35a. The air flows upward through the air flow path 35a, and the main filter 35b collects fine foreign matter to become clean air. enter. The air that has entered this portion flows into the blowout nozzle 41 and is blown out toward the shower room 34 from the blowout port 41a.

The blow-off nozzles 41, 41 are formed in a cylindrical shape extending in a direction perpendicular to the direction in which the person N passes (vertical direction in FIG. 3, direction perpendicular to the plane of paper in FIGS. 4 and 5). Slit-shaped air outlets 41a, 41a extending in the vertical direction are provided on opposing outer circumferences.
Further, as shown in FIG. 5, the blowout angle θ of the air blown out from the blowout port 41a of the blowout nozzle 41 is set to 0° to 35°, but may be set to -35° to 35°. .
However, the blowing angle θ of the air is perpendicular to the imaginary airflow line KL1 of the blowing air blown from the blowing nozzle 41 towards the person side and opposite to the direction of approach of the person N. This is the angle formed with the vertical imaginary line KL2. Further, in this embodiment, the air blowing angle θ is set to about 5°.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown from the blowing nozzle 41 will go in the direction in which the person N approaches. This is because there is a risk that the dust blown from N's (clothes) may enter the clean room, etc. in front of the person N's approach direction, and if θ exceeds 35 degrees, the dust may adhere to N's (clothes). This is because it becomes difficult for the dust to be blown away.
When the air blowing angle θ is 0° to 35°, the air blown from the pair of left and right blowing nozzles 41, 41 hits the opposing surfaces (front and back) of the person N, and the Coanda effect causes the air to flow into the person N. Since the air flows in a pulsating manner along both surfaces of the person N, the dust adhering to both surfaces of the person N is blown away and removed.
Moreover, on the upper surface side of the shoulders and the upper surface side of the head which are substantially orthogonal to the surface of the person N, the air blown out from the pair of blowing nozzles 41, 41 collides with each other, and the upper surface of the shoulders and the upper surface of the head of the person N collides with each other. Due to the Coanda effect, the air flows in a pulsating manner along the upper surface of the shoulders and the upper surface of the head of the person N, so that the dust adhering to the upper surface of the upper surface of the shoulders and the upper surface of the head of the person N is blown away.
Furthermore, the smaller the air blowing angle θ, the easier it is to blow off the dust adhering to the surface of the person N, but there is a risk that the blown dust may enter the clean room, etc. in front of the person N in the direction of entry. , the air blowing angle θ is set in consideration of these points.

Further, the opening width of the air outlet 41a of the air blowing nozzle 41, that is, the nozzle width w (see FIG. 3(a)), is set to 30 mm to 50 mm. Here, the nozzle width of the blowout nozzle 41 is set to 30 mm to 50 mm because if it is less than 30 mm, the amount of air blown out will be small and it will be difficult to obtain a dust removal effect.If it exceeds 50 mm, the air wind speed ( This is because the blowing speed) becomes low, making it difficult to obtain a dust removal effect.

Further, the blowing speed of the air blown out from the blowing nozzle 41 is set to 18 m/s to 30 m/s.
Here, the blowing speed of the air blown out from the blowing nozzle 41 is set to 18 m/s to 30 m/s because if it is less than 18 m/s, the air blowing speed becomes small and it is difficult to obtain a dust removal effect. This is because if the speed exceeds 30 m/s, the air blowing speed increases, and the blown dust is scattered, reflected by the partition walls 33, 33, and there is a possibility that it may re-adhere to the person N.

In this embodiment, the blow-off nozzle 41 is fixedly provided on the partition wall 33, but the present invention is not limited to this, and the blow-off nozzle 31 may be provided so as to be swingable from side to side when viewed from above. In this case, the air blowing angle θ can be easily set to any angle between 0° and 35°.

As explained above, according to the air shower device 30 of this embodiment, the blowing angle θ of the air blowing out from the blowing nozzles 41, 41 is set to 0° to 35°, so that the air does not adhere to the person N. It is possible to reliably blow away the dust that is present.
Further, the blow-off nozzle 41 blows out clean air in which foreign matter has been collected by the pre-filter 39 and the main filter 35b of the air purification chamber 35, so that it is possible to prevent dust from adhering to the person N by the blown air.

(Third embodiment)
6 to 8 show embodiments of the pass box according to the present invention, FIG. 6(a) is a side sectional view of the pass box, FIG. 6(b) is a front view of the same, FIG. 7 is a plan view of the same, FIG. 8 is a diagram for explaining the air blowing direction.

As shown in FIGS. 6 and 7, the pass box 50 of this embodiment includes a box-shaped main case 52, a case pedestal 52a on which the main case 52 is installed, and an air blower provided inside the main case 52. A mounting device 70 is provided.
The main body case 52 is provided with partition walls 53a, 53a facing each other, a ceiling wall 53b is provided at the upper end of the partition walls 53a, 53a to connect the partition walls 53a, 53a, and a ceiling wall 53b is provided at the lower end of the partition walls 53a, 53a. A bottom wall 53c is provided to connect the partition walls 53a, 53a. A space surrounded by the partition walls 53a, 53a, ceiling wall 53b, and bottom wall 53c is a shower room 54 that penetrates the inside of the main body case 52 from the front side to the back side.
Further, an inner case 55 is provided outside the partition walls 53a, 53a and the ceiling wall 53b and inside the main case 52, and an air flow passage 56 is provided between the inner case 55 and the main case 52. This airflow passage 56 is formed into a substantially gate shape when viewed from the front.

Further, a chamber 57 is provided at the inner upper part of the main body case 52, and the inside of this chamber 57 and the air flow path 56 are in communication. Further, a fan 58 is provided on the upper surface of the chamber 57, and a main filter 59 is provided on the lower surface.
Further, the upper wall of the inner case 55 is in close contact with the main filter 59, and an opening through which air passes is provided in the upper wall, facing the main filter 59.
Further, an air cleaning chamber 60 is defined between both side walls of the inner case 55 and the partition walls 53a, 53a, and between the upper wall of the inner case 55 and the ceiling wall 53b. Further, an exhaust chamber 61 is formed between the bottom wall 53c and the case frame 52a, and the exhaust chamber 61 and the air flow passages 56, 56 communicate with each other. Further, the bottom wall 53c includes a suction plate 62 having a large number of suction ports, and the shower room 54 and the exhaust chamber 61 communicate with each other via the suction plate 62. Further, the suction plate 62 is provided with a pre-filter 63 made of nonwoven fabric or the like.
Further, doors 64, 64 are provided at both ends of the shower room 54, one of which leads to the outside and the other to the clean room. Then, one door 64 is opened to carry article B (see FIG. 8) into the shower room 54 from outside, and the other door 64 is opened to carry article B from the shower room 54 into the clean room. .

A pair of left and right blowing nozzles 71, 71 forming an air blowing device 70 are provided in the air cleaning chamber 60. One blowout nozzle 71 is provided on one partition wall 53a forming the air purification chamber 60, and the other blowoff nozzle 71 is provided on the other partition wall 53a forming the air purification chamber 60.
The blowing nozzle 71 extends along a direction (vertical direction in FIG. 6, direction perpendicular to the plane of the paper in FIG. 7) that intersects the passing direction of the article B (left-right direction in FIG. 6(a)), and extends from the shower room 54. Air is blown onto the article B being carried into the warehouse. Further, the spray nozzle 71 is fixed to the partition wall 53a at the center in the width direction.

In such an air purification chamber 60, when the fan 58 is started, the air in the shower chamber 54 is sucked in through the suction plate 62, foreign matter such as dust is collected by the pre-filter 63, and then the air is discharged from the exhaust chamber 61. The air enters the air flow passage 56, flows upward through the air flow passage 56, and flows into the chamber 57.Furthermore, fine foreign matter is collected by the main filter 59 to become clean air, and this clean air is used as an air purifier. Enter chemical room 60. The air that has entered the air cleaning chamber 60 flows into the blow-off nozzles 71, 71, and is blown out toward the shower room 54 from the blow-off ports 71a, 71a.

The blowing nozzles 71, 71 are formed in a cylindrical shape extending in a direction perpendicular to the passing direction of the article B (vertical direction in FIG. 6, direction perpendicular to the plane of paper in FIGS. 7 and 8). Slit-shaped air outlets 71a, 71a extending in the vertical direction are provided on opposing outer circumferences.
Further, as shown in FIG. 8, the blowing angle θ of the air blown out from the blowing outlet 71a of the blowing nozzle 71 is set to 0° to 35°, but it may be set to -35° to 35°. .
However, the blowing angle θ of the air is perpendicular to the imaginary airflow line KL1 of the blowing air blown from the blowing nozzle 71 toward the article side and opposite to the direction of article B's approach, and the direction of article B's approach. This is the angle formed with the vertical imaginary line KL2. Further, in this embodiment, the air blowing angle θ is set to about 5°.

Here, the air blowing angle θ is set to 0° to 35° because if θ is less than 0°, most of the air blown from the blowing nozzle 71 will go in the direction in which the article B enters. This is because there is a risk that the dust blown off from item B may enter the clean room, etc. in front of the entry direction of item B, and if θ exceeds 35°, it becomes difficult for the dust attached to item B to be blown away. be.
When the air blowing angle θ is 0° to 35°, the air blown from the left and right pair of blowing nozzles 71, 71 hits the opposing surfaces (both side surfaces) of the article B, and the air blows onto the article B due to the Coanda effect. Since the air flows in a pulsating manner along both side surfaces, the dust attached to both sides of the article B is blown off and removed.
Furthermore, on the upper surface side and the lower surface side of the article B (the lower surface side when there is a predetermined interval between the lower surface of the article B and the bottom wall 53c), the air blown from the pair of blowing nozzles 71 and 71 collides with each other. At the same time, the air flows in pulsations along the top and bottom surfaces of the article B due to the Coanda effect, and the dust adhering to the top and bottom surfaces of the article B is blown away by this air.
Furthermore, the smaller the air blowing angle, the easier it is to blow away the dust attached to the surface of the article B, but there is a risk that the blown dust may enter the clean room etc. in front of the article B in the direction of entry. The air blowing angle θ is set in consideration of these points.

Further, the opening width of the air outlet 71a of the air blowing nozzle 71, that is, the nozzle width w (see FIG. 6(a)), is set to 30 mm to 50 mm. Here, the nozzle width of the blowout nozzle 71 is set to 30 mm to 50 mm because if it is less than 30 mm, the amount of air blown out will be small and it will be difficult to obtain a dust removal effect. This is because the blowing speed) becomes low, making it difficult to obtain a dust removal effect.

Further, the blowing speed of the air blown out from the blowing nozzle 71 is set to 18 m/s to 30 m/s.
Here, the blowing speed of the air blown out from the blowing nozzle 71 is set to 18 m/s to 30 m/s because if it is less than 18 m/s, the air blowing speed becomes small and it is difficult to obtain a dust removal effect. This is because if the speed exceeds 30 m/s, the air blowing speed increases, and the blown dust may be scattered, reflected by the partition walls 53a, 53a, and re-attached to the article B.

In the present embodiment, the blow-off nozzle 71 is fixedly provided on the partition wall 53a, but the present invention is not limited to this, and the blow-off nozzle 71 may be provided so as to be swingable from side to side in a plan view. In this case, the air blowing angle θ can be easily set to any angle between 0° and 35°.

As explained above, according to the pass box 50 of the present embodiment, the blowing angle θ of the air blown from the blowing nozzles 71, 71 is set to 0° to 35°, so that the air does not adhere to the article B. It can reliably blow away any dust that may be present.
Moreover, since the blowing nozzle 71 blows out clean air in which foreign matter has been collected by the pre-filter 63 and the main filter 59, it is possible to prevent dust from adhering to the article B due to the blown air.

H Hand (object)
N Human (object)
B Goods (objects)
θ Air blowing angle KL1 Air flow virtual line KL2 Vertical virtual line 10 Hand dryer 30 Air shower device 50 Pass box 20, 40, 70 Air cleaning device 21, 41, 71 Blowing nozzle

Claims (2)

An air shower device equipped with an air blowing device that blows air,
comprising a box-shaped main body case and the air blowing device provided within the main body case,
A main body case is provided with partition walls facing each other, and the space between the partition walls forms a shower room that penetrates the inside of the main case from the front side to the back side,
An air cleaning chamber is formed between the partition wall and the main body case,
The air purification room is arranged on both sides of the shower room,
The air blowing device includes a pair of blowing nozzles that are spaced parallel to each other and into which a person enters,
One of the air purifying chambers is provided with one of the blowing nozzles, and the other of the air purifying chambers is provided with the other blowing nozzle,
The blowing nozzle extends along a direction intersecting the direction of entry of the person, and blows air to the person,
The blowing angle θ of the air blowing out from the blowing nozzle is set to 0° to 35°,
The air purification room and the shower room communicate with each other through an opening at their bottoms,
The air purification chamber is provided with a blower that sends air from the shower chamber into the air purification chamber through the opening,
A pre-filter is provided in the opening,
In the lower part of the air purifying chamber, one edge of the pre-filter on the side farther from the shower room is in contact with the bottom surface of the main body case, and the other edge on the side closer to the shower room is in contact with the bottom surface of the main body case. It is slanted so that it is located at a high position,
A main filter is provided in the air cleaning chamber facing the blowing nozzle,
The air shower device is characterized in that the blowing nozzle blows out clean air in which foreign matter has been collected by the pre-filter and the main filter.
However, the direction in which the person enters is the direction in which the person goes from the outside located on one side of the air shower device through the internal shower room to the clean room located on the other side of the air shower device,
The blowing angle θ of the air is perpendicular to the imaginary airflow line of the blowing air blown from the blowing nozzle toward the person and opposite to the direction in which the person enters, and , is the angle formed with a vertical imaginary line perpendicular to the extending direction of the blowing nozzle. The air cleaning room is divided into upper and lower parts by a partition wall,
An air flow passage is provided in the air purification chamber and extends vertically through the partition wall,
The main filter is provided above the partition wall of the airflow passage and faces the blowout nozzle,
The air that has passed through the pre-filter flows into the air flow passage below the partition wall and flows upward through the air flow passage, and the clean air that has passed through the main filter flows through the air purification channel. The air shower device according to claim 1, wherein the air enters a portion of the room above the partition wall, flows into the blowout nozzle, and is blown out from the blowout nozzle toward the shower room.

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