JP6742507B2 - Hand dryer - Google Patents

Description

The present invention relates to a hand dryer that blows an air stream on a wet hand after cleaning to dry the hand.

In order to maintain the hand in a hygienic state, it is necessary to hygienically perform the hand washing treatment and the drying treatment after washing. For this reason, instead of wiping your wet hand after cleaning with a towel or a hand towel such as a handkerchief, you should blow a high-speed air stream onto your wet hand to blow away the water that adheres to your hand and dry it. A dryer is used.

Patent Document 1 includes a drainage channel communicating with the manual insertion section, an exhaust channel communicating with the manual insertion section, a louver provided in the middle of the exhaust channel, and an exhaust port provided at the lower end of the exhaust channel. There is disclosed a hand dryer that suppresses water droplet scattering. In the hand dryer of Patent Document 1, since water droplets do not splash directly to the exhaust port, it is possible to reduce the splashing of water droplets from the exhaust port.

Patent No. 4579196

However, in the hand dryer of Patent Document 1, the opening area of the drainage channel provided on a part of the bottom surface of the hand insertion portion is smaller than the area of the bottom surface of the hand insertion portion, and on the left and right side surfaces. It is separated from the entrance of the provided exhaust passage. The air ejected from the nozzle flows downward along one inner wall in the front-rear direction of the hand insertion portion, changes its direction in the front-rear direction along the bottom surface of the hand insertion portion, and further the other inner wall in the front-rear direction of the hand insertion portion. Flow upwards along and generate a swirling flow. Then, there is a problem that some of the water droplets removed from the hand may be scattered from the inlet of the hand insertion portion to the outside by the swirling flow.

The present invention has been made in view of the above, and an object of the present invention is to obtain a hand dryer that can suppress the scattering of water droplets from the hand insertion portion.

In order to solve the above-mentioned problems and achieve the object, a hand dryer according to the present invention includes a blower unit that generates an air flow, a casing that houses the blower unit and forms an outer shell of a main body, and a casing. A hand dryer that has openings at the top and bottom of the body to allow the user's hand to be inserted and removed from above, a nozzle that is placed in the hand dryer and that blows out the airflow generated by the air blower to the hand dryer, and hand dryer And a discharge port provided at the lower end opening in communication with the section. Further, the hand dryer is provided with a water storage unit provided below the discharge port, an exhaust passage provided beside the discharge port for exhausting the airflow ejected from the nozzle to the hand drying unit, and a downstream end of the exhaust passage. And an exhaust port provided in the. Outlet, the width in the width direction of the housing Ri der least half of the horizontal width of the upper end of the hand drying unit is positioned from the center of the housing in the vertical direction of the casing downwards. Then, two inner wall surfaces of the housing that surround the hand drying section and that face each other across the hand drying section in the front-rear direction of the housing are separated in the front-rear direction of the housing.

The hand dryer according to the present invention has an effect of being able to obtain a hand dryer that can prevent water droplets from scattering from the hand insertion portion.

1 is a perspective view showing a hand dryer according to a first embodiment of the present invention. It is sectional drawing which shows the hand dryer concerning Embodiment 1 of this invention, and is a longitudinal cross-sectional view along the II-II line in FIG. It is sectional drawing which shows the hand dryer which concerns on Embodiment 1 of this invention, and is a longitudinal cross-sectional view along the III-III line in FIG. It is a principal part sectional view which shows the hand dryer concerning Embodiment 1 of this invention, and is a principal part sectional view which shows the state which removed the water storage tank in FIG. The perspective view which shows the water storage tank of the hand dryer concerning Embodiment 1 of this invention. The perspective view which shows the cover in the hand dryer concerning Embodiment 1 of this invention.

Hereinafter, a hand dryer according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
1 is a perspective view showing a hand dryer 100 according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the hand dryer 100 according to the first embodiment of the present invention, which is a vertical cross-sectional view taken along the line II-II in FIG. 1. FIG. 3 is a cross-sectional view showing the hand dryer 100 according to the first embodiment of the present invention, which is a vertical cross-sectional view taken along the line III-III in FIG. 1. FIG. 4 is a cross-sectional view of a main part of the hand dryer 100 according to the first embodiment of the present invention, and is a cross-sectional view of the main part with the water storage tank removed in FIG. FIG. 5: is a perspective view which shows the water storage tank of the hand dryer 100 concerning Embodiment 1 of this invention. FIG. 6 is a perspective view showing a cover in the hand dryer 100 according to the first exemplary embodiment of the present invention. 2 and 3, a white arrow indicates the direction of the air flow, and a hatched arrow indicates the flow of the surrounding air.

As shown in FIGS. 1 to 3, the hand dryer 100 according to the first embodiment includes a front panel 1a forming a front outer shell, a rear panel 1b forming a rear outer shell, and a pair of side panels 1c, 1c. It has a housing 1 which is formed of the outer shell. An upper surface opening, which is the hand insertion portion 2, is provided on the top of the housing 1. Further, a lower surface opening which is the discharge port 4 is provided in the lower portion of the housing 1. That is, the housing 1 is surrounded by the rear panel 1b, the front panel 1a, and the pair of side panels 1c, 1c, and is exposed to the outside via the hand insertion portion 2 and the outlet 4 which are openings provided at the upper and lower ends. It has a hollow portion which is the hand drying portion 3 which communicates. The hand drying unit 3 can freely insert and remove the user's hand from above.

Then, on the upper side of the housing 1 and below the hand insertion portion 2, it is surrounded by the inner wall 1bb of the rear panel, the inner wall 1ab of the front panel and the pair of side panels 1c, 1c, and inserted from the hand insertion portion 2. A hand dryer 3 is provided to cover the user's hand and dry the hand. The side panel 1c preferably closes the side surface of the hand dryer 100 in the vertical direction as shown in FIG. 1, but in consideration of insertability of the hand, regarding the upper region where there are few water droplets splashing directly from the hand. May have notches. The hand dryer 3 is provided with a hand detection sensor (not shown) that detects that the user's hand has been inserted.

The inner wall 1bb of the rear panel that surrounds the hand dryer 3 is inclined from the rear side to the front side as it goes downward from the middle position in the vertical direction. In other words, the shape of the back surface of the hand drying unit 3 is a shape that is narrowed from the back surface side to the front surface side from the midway position in the vertical direction toward the lower side in a side view.

Further, the inner walls of the side panels 1c, 1c that surround the hand drying section 3 incline from the side surface side toward the center side in the width direction of the housing 1 from the middle position in the vertical direction toward the lower side. That is, the hand drying unit 3 has a shape in which the hand drying unit 3 is squeezed from the side surface side toward the center side in the width direction of the housing 1 from the midway position in the vertical direction toward the lower side in the front view. Therefore, in the front view, the hand drying unit 3 has a width-reduced region 3b having a narrowed width and a downward slope from the left and right lateral end portions toward the central portion in the central portion in the height direction. An area on the upper side of the width reduction area 3b in the hand drying section 3 is a wide area 3a having a wider width than the width reduction area 3b, and an area on the lower side of the width reduction area 3b of the hand drying section 3 is a width reduction area. It is a narrow region 3c having a width smaller than that of 3b. The lower surface opening which is the discharge port 4 communicating with the hand dryer 3 is provided at the lower end of the narrow region 3c. The edges of the discharge port 4 in the front-rear direction are front and rear wall surfaces in the front-rear direction of the hand drying section 3, which is a hollow portion. In FIG. 3, the inner wall 1ab of the front panel and the inner wall 1bb of the rear panel are separated by the outlet 4. The lateral width of the discharge port 4 is at least ½ or more of the lateral width of the manual insertion section 2. The width direction of the hand insertion portion 2 is the same as the width direction of the housing 1, and is also referred to as the left-right direction.

Also, in a front view, a U-shape that is recessed above the discharge port 4 in the front view on the left and right sides of the lower region of the hand drying unit 3 beside the discharge port 4 in the pair of side panels 1c, 1c. A case recess 12b having a concave shape is provided. The housing recess 12b is provided on the front side of the pair of side panels 1c, 1c. When viewed from the front, the upper corner portion of the housing recess 12b has a rounded corner radius shape. With such a configuration, the exhaust passage 12 can be arranged on the lower side of the hand drying unit 3, and the hand dryer 100 that can reduce splashes from the hand drying unit 3 while suppressing the lateral width of the outer shell. Is obtained. However, the configuration of the exhaust passage 12 is not limited to the above-described configuration, and if the lateral width of the outer shell of the hand drying device 100 is not limited, the narrow region 3c is not provided in the hand drying unit 3 and the exhaust passage 12 is not provided. May be provided outside the side panel 1c.

As shown in FIG. 3, the hand dryer 100 has a housing 1 in which a high-pressure airflow generator 8 that is a blower unit that generates a high-pressure airflow that is a high-pressure airflow is incorporated. The high-pressure airflow generator 8 is installed inside the housing 1 on the back side of the narrow region 3c of the hand dryer 3. The high-pressure airflow generator 8 is arranged with the intake side as the lower surface and the exhaust side as the upper surface. The operation of the high-pressure airflow generator 8 is controlled by a controller (not shown).

As shown in FIG. 3, the intake side of the high-pressure airflow generator 8 communicates with an upper part of an intake duct 10 which is an internal air passage provided on the back side inside the housing 1. The lower end of the intake duct 10 opens downward as an intake port 9 for sucking the air supplied to the high-pressure airflow generator 8 from around the hand dryer 100. That is, inside the housing 1, an intake duct 10 that communicates from the intake port 9 to the high-pressure airflow generator 8 is provided. Further, an intake filter 14 is arranged at the intake port 9. As a result, the hand dryer 100 can take in outside air outside the hand dryer 100 from the intake port 9 to the intake duct 10 through the intake filter 14.

The hand dryer 100, which includes the intake filter 14, can collect impurities such as dust, dust, and floating bacteria contained in the ambient air sucked from the intake port 9. As a result, the hand dryer 100 can prevent impurities contained in the ambient air from being sucked into the hand dryer 100, and can dry the user's hand with a hygienic air flow. As the intake filter 14, it is preferable to use a high-performance filter having a high air purifying ability, such as a HEPA (High Efficiency Particulate Air) filter and an ULPA (Ultra Low Penetration Air) filter.

On the other hand, the exhaust side of the high-pressure airflow generator 8 includes a front exhaust duct 11a and a rear exhaust duct 11b, which are exhaust ducts 11 that are vertically connected inside the housing 1 and are branched into a front side and a rear side. It communicates downward. The front exhaust duct 11a and the rear exhaust duct 11b are communicated with each other by a connection flow path (not shown). The high-pressure air flow that has been increased in pressure by the high-pressure air flow generator 8 is discharged to the front exhaust duct 11a and the rear exhaust duct 11b that are provided in connection with the high-pressure air flow generator 8. That is, an exhaust duct 11 for exhausting the high pressure air flow from the high pressure air flow generation device 8 is provided inside the housing 1.

Above the front exhaust duct 11a and the rear exhaust duct 11b, there are provided a front hand drying nozzle 5a and a rear hand drying nozzle 5b, which are nozzles 5 for injecting an air flow obliquely downward toward the hand drying unit 3. There is. That is, in the hand-drying section 3, the front exhaust duct 11a and the hand-drying section 3 are communicated with each other at the upper end of the front panel 1a and below the hand insertion section 2 on the inner wall of the front panel 1a. A front hand drying nozzle 5a for ejecting air toward the hand drying unit 3 is provided. Further, the rear exhaust duct 11b and the hand drying section 3 are communicated with each other at the upper end of the rear panel 1b and below the hand insertion section 2 on the inner wall of the rear panel 1b, and the rear exhaust duct 11b is directed to the hand drying section 3 from the rear exhaust duct 11b. A rear hand drying nozzle 5b for ejecting air is provided. That is, the nozzle 5 is provided at the upper end of the hand dryer 3. The front hand drying nozzle 5a and the back hand drying nozzle 5b are a plurality of small holes made of rectangular slits. The small holes are arranged in a row in the horizontal direction, that is, in the width direction of the hand dryer 100 when viewed from the front.

The small hole is not limited to the slit-shaped nozzle hole, and may be a circular hole whose opening shape is circular. Further, the arrangement of the small holes is not limited to one row, and may be arranged in a plurality of rows. Further, here, the case where the front panel 1a is provided with the front hand drying nozzle 5a and the rear panel 1b is provided with the back hand drying nozzle 5b is shown, but either the front panel 1a or the back panel 1b is provided. The nozzle 5 may be provided on one side.

Further, in the hand drying device 100, a water storage tank 6 which is a water container is disposed below the discharge port 4 as a water storage unit for storing water droplets blown off by the high-pressure air flow from the hand placed in the hand drying unit 3. .. The water storage tank 6 is attachable to and detachable from the housing 1. The water storage tank 6 is fixed to the housing 1 by hooking an unillustrated claw portion provided on the water storage tank 6 on an unillustrated claw receiving portion provided on the housing 1.

The upper side of the water storage tank 6 is covered with a cover 7 having a function of a water receiver for receiving water droplets blown off by an air flow from a hand arranged in the hand dryer 3. The cover 7 is removable from the water storage tank 6. The cover 7 is fixed to the water storage tank 6 by hooking a not-shown claw portion provided on the cover 7 to a not-shown claw receiving portion provided on the water storage tank 6.

As shown in FIGS. 2 and 6, the cover 7 is provided with a convex portion 7a protruding upward in a mountain shape at the center of the hand drying device 100 in the width direction in a front view. That is, the cover 7 has a concavo-convex shape in which the center portion in the width direction of the cover 7 protrudes upward in a mountain shape. As will be described later, the cover 7 can guide the air flow and water droplets discharged downward from the discharge port 4 to the exhaust passage 12 by dividing the air flow and the water droplets in the left-right direction by the slope of the convex portion 7a on the upper surface of the cover 7. .. Further, as shown in FIG. 6, the cover 7 is provided with drain holes 7b for discharging the water droplets received on the upper surface of the cover 7 to the water storage tank 6 at both left and right edge portions.

As shown in FIG. 5, the water storage tank 6 is a water container having a box shape in which a front plate 15a, a rear plate 15b, a pair of side plates 15c and 15c, and a bottom plate 15d are surrounded and a top surface is opened. 15 are provided. In addition, on the upper portions of the two left and right wall surfaces of the water containing portion 15, that is, on the upper portions of the pair of side surface plates 15c, 15c located in the width direction of the water containing portion 15, the first plate extending upward from the side surface plates 15c, 15c is provided. A water blocking rib 12a, which is one rib, is provided. The water blocking rib 12a projects above the upper end of the back plate 15b of the water containing portion 15.

Further, the left and right ends of the water storage tank 6, that is, the outside of the pair of side surface plates 15c, 15c in the width direction of the water storage tank 6, are second ribs with a predetermined distance from the pair of side surface plates 15c, 15c. A pair of design ribs 16 is provided. The design rib 16 is provided in a flat plate shape that is bent in a right angle direction from the front plate 15a to the back side. An upper side, a lower side and a rear side are opened between the side surface plate 15c and the design ribs 16 to form a space for forming an exhaust passage 12 described later. The upper surfaces of the front plate 15a, the water blocking ribs 12a, and the design ribs 16 have the same height.

By mounting the water storage tank 6 on the housing 1, the water stop rib 12 a and the design rib 16 provided on the water storage tank 6 and the housing recess 12 b of the housing 1 form the exhaust passage 12. .. The exhaust passage 12 is an exhaust passage for exhausting the high-pressure air flow blown out to the hand dryer 3 to the outside of the hand dryer 100. The downstream end of the exhaust passage 12 serves as an exhaust port 17 that allows exhaust air to escape to the outside of the hand dryer 100, and is open downward. An exhaust filter 13 is arranged at the exhaust port 17.

Here, in the hand dryer 100, when the water storage tank 6 is attached to the housing 1, the housing recess 12b and the water blocking rib 12a form the exhaust passage 12. That is, when viewed from the front, the U-shaped housing recess 12b that is recessed above the discharge port 4 in a state where it is not in contact with the inner wall of the housing recess 12b and the upper end position is above the discharge port 4. The exhaust passage 12 is formed as a so-called labyrinth-shaped exhaust passage by fitting the I-shaped water blocking rib 12a inside. That is, the exhaust passage 12 is a labyrinth-shaped exhaust passage in which the passage is bent 180 degrees on the bottom side of the housing recess 12b.

When the water storage tank 6 is mounted on the housing 1, the upper surface 16a of the design rib comes into contact with the lower surface 1ca of the side panel of the housing 1 without a gap, as shown in FIG. As a result, the high-pressure air flow that has flowed from the hand dryer 3 through the outlet 4 into the exhaust passage 12 does not leak from between the design rib 16 and the lower surface 1ca of the side panel of the housing 1.

Further, the upper surface 15aa of the front plate of the water storage tank 6 comes into contact with the lower surface 1aa of the front panel of the housing 1 without a gap when the water storage tank 6 is mounted on the housing 1, as shown in FIG. As a result, the high-pressure air flow that has flowed into the exhaust passage 12 from the hand dryer 3 through the outlet 4 does not leak from between the upper surface 15aa of the front plate of the water storage tank 6 and the lower surface 1aa of the front panel of the housing 1. Absent.

Further, the back plate 15b of the water storage tank 6 is a rear panel which is a region below the inner wall of the back panel 1b of the housing 1 when the water storage tank 6 is mounted on the housing 1, as shown in FIG. It contacts the inner wall lower region 1ba without any gap. As a result, the airflow discharged downward from the discharge port 4 does not leak from between the back plate 15b of the water storage tank 6 and the back panel 1b of the housing 1.

Next, the operation of the hand dryer 100 will be described. When a hand is inserted into the hand dryer 3, the hand detection sensor detects that the hand has been inserted. When the hand detection sensor detects a hand, the high-pressure airflow generator 8 is operated by the control of the control unit, and ambient air is sucked through the intake port 9.

The ambient air sucked from the intake port 9 passes through the intake duct 10 and is sucked into the high-pressure airflow generator 8. The air sucked by the high-pressure airflow generator 8 is compressed by the high-pressure airflow generator 8 into a high-pressure airflow, and flows through the exhaust duct 11 to the front hand drying nozzle 5a and the back hand drying nozzle 5b. , And is blown into the hand dryer 3 as a nozzle jet.

When the nozzle jet flow blown into the hand drying unit 3 hits the user's hand, water droplets attached to the user's hand are blown off together with the nozzle jet flow, and the user can dry his hand. Generally, the amount of water droplets attached to the user's hand is larger in the palm than in the back of the hand. Therefore, it is preferable that the flow velocity of the nozzle jets blown from the front hand drying nozzle 5a be higher than the flow velocity of the nozzle jets blown from the rear hand drying nozzle 5b.

Further, when the nozzle jets are blown from the front hand drying nozzle 5a and the back hand drying nozzle 5b, the atmospheric pressure around the front hand drying nozzle 5a and the back hand drying nozzle 5b decreases, and the hand insertion portion 2 The ambient air above is drawn into the hand dryer 3. In the hand drying apparatus 100 according to the first embodiment, the front hand drying nozzle 5a and the back hand drying nozzle 5b are arranged at the upper end of the hand drying unit 3. Therefore, air is drawn in from a wider area above the hand insertion section 2, and the amount of air drawn into the hand drying section 3 increases. When the user puts his/her hand into the hand dryer 3, the nozzle jet collides with the palm and the back of the user. After hitting the user's hand, most of the nozzle jet flows downward, but part of it flows upward. Then, the nozzle jet flow that collides with the hand and bounces back and flows upward, and the surrounding air drawn into the hand drying unit 3 collides with each other, so that the nozzle jet flow after the collision with the hand moves upward from the hand insertion unit 2. It is possible to suppress the discharge of the water to the outside of the hand dryer 100. Therefore, it is possible to prevent the water droplets from scattering from above the hand dryer 100 to the outside.

When the user gradually raises his/her hand and the jet flow collides with the user's finger, the nozzle jet flow that does not directly collide with the user's hand increases in the area between the fingers. The nozzle jets that do not directly collide with the user's hand collide between the front and rear nozzle jets in the hand drying unit 3, that is, the nozzle jets blown from the front hand drying nozzle 5a and the rear hand drying nozzles 5b. After colliding with the nozzle jet flow to be generated, it collides with the inner wall 1bb of the rear panel. The front-rear direction in the hand drying unit 3 is the same as the front-rear direction of the housing 1. The nozzle jets that collide with the inner wall 1bb of the rear panel are attenuated to some extent by the collisions of the nozzle jets, but have sufficient velocity components to flow out of the hand dryer 3.

In the hand dryer 100 according to the first embodiment, since the flow velocity of the nozzle jets blown from the front hand drying nozzle 5a is faster than the flow velocity of the nozzle jets blown from the rear hand drying nozzle 5b, After the nozzle jets have collided with each other, the nozzle jets collide with the inner wall 1bb of the rear panel and become a swirling air flow that swirls along the inner wall of the hand drying unit 3.

Here, in the case where the discharge port 4 is not provided, the nozzle jet flow after colliding with the front and rear nozzle jets travels through the inner wall 1bb of the rear panel, the bottom of the hand drying unit 3, and the inner wall 1ab of the front panel, and is And it is discharged from the outside of the nozzle to the outside of the hand dryer 100 above the hand insertion portion 2. The water droplets blown from the user's hand are scattered to the outside by this swirling airflow.

In the hand dryer 100 according to the first embodiment, the nozzle jets after collision with the front and rear nozzle jets are suppressed from flowing upward of the hand insertion portion 2 and discharged downward from the hand drying portion 3. In addition, an outlet 4 which is effective and has a sufficient opening width is provided at the bottom of the hand dryer 3, and the outlet 4 separates the inner wall 1ab of the front panel from the inner wall 1bb of the rear panel. That is, the inner wall surface of the housing 1 that surrounds the hand-drying section 3 and the two inner wall surfaces that face each other across the hand-drying section 3 in the front-back direction of the housing 1 are the inner wall 1ab of the front panel and the inner wall of the rear panel. 1 bb is divided in the front-back direction of the housing 1. The entire lower end of the hand-drying section 3, which is a hollow section, serves as the discharge port 4. Therefore, the jet flow colliding with the inner wall 1bb of the rear panel cannot swirl to the inner wall 1ab of the front panel, and is discharged downward from the discharge port 4.

On the other hand, in the case where there is a region where the discharge port 4 is not provided at the bottom of the hand drying unit 3, that is, a region where the inner wall 1ab of the front panel and the inner wall 1bb of the back panel are connected at the bottom of the hand drying unit 3, the above-described case is performed. The swirling air flow swirls in the hand dryer 3 and is discharged upward. In order to suppress the splash from the hand drying section 3, it is necessary to direct the main direction of the swirling airflow in the hand drying section 3 downward. In order to direct the main direction of the swirling airflow in the hand dryer 3 downward and to effectively control the splash, it is necessary that the width of the discharge port 4 be 1/2 or more of the width of the hand insertion part 2. is there. That is, the horizontal width of the discharge port 4 needs to be 1/2 or more of the horizontal width of the upper end of the hand drying section 3. Further, when the width of the discharge port 4 is equal to or larger than the width of the manual insertion part 2, almost all of the swirling air flow in the hand drying part 3 is discharged downward from the discharge port 4.

Then, the water droplets blown off from the user's hand are also discharged downward together with the swirling airflow from the discharge port 4 by this swirling airflow.

As a further method for reducing the scattering of water drops, it is preferable to lower the position of the discharge port 4 in the height direction. By lowering the height of the discharge port 4, the swirling distance in the hand drying unit 3 becomes longer, and the time for the swirling airflow to reach the hand inserting unit 2 can be lengthened. The water droplets scattered by the swirling airflow are mainly water droplets floating in the air, and water droplets attached to the wall surface in the hand dryer 3 are less likely to be scattered. Therefore, by lowering the height of the discharge port 4, it is possible to obtain a longer time for the water droplets blown from the user's hand to adhere to the wall surface in the hand drying unit 3, and to the outside of the hand drying device 100. It is possible to reduce the scattering of water droplets in the hand dryer 3. Therefore, the position of the discharge port 4 in the height direction is preferably located below the center of the housing 1 in the vertical direction.

The air flow and the water droplets discharged downward from the discharge port 4, that is, the swirling air flow discharged downward from the discharge port 4 and including the water droplets is moved in the left-right direction by the gradient of the convex portion 7a on the upper surface of the cover 7. It is divided and guided to the exhaust passage 12. Here, the height from the position of the discharge port 4 to the upper surface of the water blocking rib 12a is set so that the air flow cannot push up the water droplets. For this reason, the water droplet cannot pass over the water blocking rib 12a in the exhaust passage 12. That is, the height from the position of the discharge port 4 to the upper surface of the water blocking rib 12a is given upward kinetic energy for climbing the exhaust passage 12 by the air flow flowing into the exhaust passage 12, but the upward direction given by the air flow is given. The kinetic energy of is smaller than the gravitational force applied to the water droplets. The height from the position of the discharge port 4 to the upper surface of the water blocking rib 12a is set to a height at which the air flow cannot push up the water drop based on the flow velocity of the nozzle jet flow after hitting the hand of the user. .. Therefore, the water droplets flow downward due to gravity, drop on the upper surface of the cover 7, and then are collected from the drain hole 7b of the cover 7 to the water storage portion 15. As a result, most of the water droplets discharged downward from the discharge port 4 are collected in the water storage unit 15.

The airflow flowing into the exhaust passage 12 passes through the labyrinth structure of the exhaust passage 12 and is discharged to the outside through the exhaust port 17. Therefore, since the labyrinth structure of the exhaust passage 12 allows the hand dryer 100 to separate the air in the exhaust stream from the water droplets contained in the exhaust stream, it is possible to prevent the water droplets from splashing from the exhaust port 17, It is possible to reduce the risk of infection of people around by the scattering of water droplets.

Further, the exhaust port 17 is provided with an exhaust filter 13. The exhaust filter 13 can collect water droplets that cannot be completely separated into air on the upstream side of the exhaust passage 12 having a labyrinth structure and impurities such as indigenous bacteria that have blown away with water from the hand. Therefore, by the labyrinth structure of the exhaust passage 12 and the exhaust filter 13, it is possible to suppress the scattering of impurities such as water droplets and indigenous bacteria from the exhaust port 17, and further reduce the concern that the surrounding people will be infected with bacteria by the water droplets. can do.

Although the case where the water blocking rib 12a is provided in the water storage tank 6 has been described above, the water blocking rib 12a may be provided in the housing 1 or the cover 7. That is, the water blocking rib 12a may be provided on at least one of the water storage tank 6, the housing 1, and the cover 7. Moreover, although the case where the design rib 16 is provided in the water storage tank 6 has been described above, the design rib 16 may be provided in the housing 1.

As described above, in the hand dryer 100, since the entire bottom of the narrow region 3c on the lower side of the hand dryer 3 is open, it is easy for air to flow downward from the outlet 4, and The upward exhaust can be reduced to reduce the rebounding airflow from the top of the hand dryer 100 to the user. By arranging the nozzle 5 at the upper end of the hand drying unit 3, the surrounding air is drawn by the nozzle jet flow, and the splash of water droplets from the hand inserting unit 2 can be further suppressed by the surrounding air. As a result, in the hand drying apparatus 100 according to the first embodiment, most of the exhaust flow of the nozzle jet flow after hitting the user's hand in the hand drying unit 3 is discharged from the exhaust port 17, so the hand insertion unit 2 It is possible to suppress the exhaust from upward from above and to suppress the scattering of water drops upward from the hand insertion portion 2.

Further, most of the nozzle jet flow after hitting the user's hand is separated into water and air on the upstream side in the exhaust passage 12 having the labyrinth structure, and only the air flow passes through the exhaust passage 12 and from the exhaust port 17. Exhausted. That is, in the hand dryer 100 according to the first embodiment, of the air flow and the water droplets discharged downward from the discharge port 4, the water droplet is first discharged in the middle of the exhaust path from the discharge port 4 to the exhaust port 17. After the removal, the air flow is exhausted from the exhaust port 17. As a result, in the hand dryer 100, it is possible to suppress the scattering of water droplets from the exhaust port 17 to the outside.

Therefore, according to the hand drying apparatus 100 according to the first embodiment, it is possible to suppress the splashing of water droplets upward from the hand insertion portion 2 into which the hand is inserted and the splashing of water droplets from the exhaust port 17. An effect is obtained that the device can be obtained. This allows

The configurations described in the above embodiments are examples of the content of the present invention, and can be combined with another known technique, and the configurations of the configurations are not deviated from the scope not departing from the gist of the present invention. It is also possible to omit or change parts.

1 housing 1a front panel, 1aa lower surface of front panel, 1ab inner wall of front panel, 1b rear panel, 1ba lower area of rear panel inner wall, 1bb inner wall of rear panel, 1c side panel, 1ca lower surface of side panel, 2 manual insertion Section, 3 hand drying section, 3a wide area, 3b narrowing area, 3c narrow area, 4 outlets, 5 nozzles, 5a front hand drying nozzle, 5b back hand drying nozzle, 6 water storage tank, 7 cover, 7a Convex portion, 7b drain hole, 8 high pressure air flow generator, 10 intake duct, 11 exhaust duct, 11a front exhaust duct, 11b rear exhaust duct, 12 exhaust passage, 12a water stop rib, 12b housing recess, 13 exhaust filter, 14 intake filter, 15 water storage part, 15a front plate, 15aa front plate upper surface, 15b back plate, 15c side plate, 15d bottom plate, 16 design rib, 16a design rib top surface, 17 exhaust port, 100 hand dryer ..

Claims (3)

An air blower that generates an air flow,
A housing that houses the blower and forms an outer shell of the main body;
A hand drying unit that has openings at the upper and lower ends of the housing and allows the user's hand to be inserted and removed from above,
A nozzle disposed in the hand drying unit for ejecting an air flow generated by the blower unit to the hand drying unit;
An outlet provided in the opening at the lower end in communication with the hand dryer,
A water storage portion provided below the discharge port,
An exhaust path provided beside the discharge port for exhausting the air flow ejected from the nozzle to the hand drying section,
An exhaust port provided at the downstream end of the exhaust passage,
Equipped with
The discharge port has a lateral width in the width direction of the housing that is ½ or more of the lateral width of the upper end of the hand drying unit, and is located below the center of the housing in the vertical direction of the housing.
Two inner wall surfaces of the housing that surround the hand drying section and that face each other across the hand drying section in the front-rear direction of the housing are separated in the front-rear direction of the housing. ,
Hand dryer characterized by. The entire lower end of the hand dryer is the discharge port,
The hand dryer according to claim 1, characterized in that. An air blower that generates an air flow,
A housing that houses the blower and forms an outer shell of the main body;
A hand drying unit that has openings at the upper and lower ends of the housing and allows the user's hand to be inserted and removed from above,
A nozzle disposed in the hand drying unit for ejecting an air flow generated by the blower unit to the hand drying unit;
An outlet provided in the opening at the lower end in communication with the hand dryer,
A water storage portion provided below the discharge port,
An exhaust path provided beside the discharge port for exhausting the air flow ejected from the nozzle to the hand drying section,
An exhaust port provided at the downstream end of the exhaust passage,
Equipped with
An inner wall surface of the housing surrounding the hand drying section, two inner wall surfaces facing each other across the hand drying section in the front-rear direction of the housing are divided in the front-rear direction of the housing,
The exhaust passage has a labyrinth structure,
The labyrinth structure of the exhaust passage is provided in at least one of the water storage portion and the housing inside a concave portion that is recessed above the discharge opening on the left and right of the discharge opening in the width direction of the housing. The water blocking rib is fitted into the recess in a non-contact state,
Hand dryer characterized by.

Images