CN104379040A - hand dryer - Google Patents

Abstract

The hand drying device comprises: a drying chamber (2), a nozzle, and an electric blower. The drying chamber (2) is formed by four wall surfaces of a front side wall surface (2a), a depth side wall surface (2b) and two inner wall surfaces (2c, 2d). The nozzles consist of front nozzles (4a) and depth nozzles (4b). The depth nozzle (4b) is provided on a protruding part (5) protruding from the wall surface (2b) on the deep side, and the protruding part (5) is separated from the two inner wall surfaces (2c, 2d) by spaces (7).

Description

hand dryer

technical field

The present invention relates to hand dryers.

Background technique

In order to dry wetted hands such as washing with water, hand dryers are installed in washrooms, toilets, kitchens, and the like. The prior art hand drying device has a drying chamber provided with a hand insertion port on the upper part of the main body. In addition, the blowing nozzle on the wall side (the blowing nozzle on the back of the hand) and the blowing nozzle on the front side (the blowing nozzle on the palm side) are installed in the drying chamber. In addition, the sides of the drying chamber are open. Then, when the hand is put into the drying chamber, air is blown from the blowing nozzle to both sides of the hand, and the water droplets are blown away to dry. At this time, the air after touching the hand is released from the open side to the outside of the hand dryer (for example, refer to Patent Document 1).

In such a conventional hand drying device, the air outlet of the blowing nozzle is positioned on the same surface as the front side and the back side of the drying chamber on both the palm side and the back side of the hand. Therefore, the drying space is narrow, and when the hand is pulled out, the back side of the hand is likely to touch the surface on the deep side of the drying chamber.

In addition, water droplets are easily splashed with the air exhausted from the side of the drying chamber. Accordingly, hand dryers that close the sides of the drying chamber have also been developed. However, in such a hand dryer with its side closed, the air blown into the drying chamber comes upward along the surface on the deep side of the drying chamber, so there is a technical problem that splashed water adheres to the wall surface.

Problems with prior art

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 10-75915

Contents of the invention

The hand drying device of the present invention is characterized in that, comprising: a drying chamber with a hand-stretching inlet opening upward, from which the hand is stretched into and drawn out from the hand-stretching inlet; a nozzle for ejecting air to the drying chamber; Electric fan for air. The drying chamber is formed of four wall surfaces, namely, a wall surface on the near side, a wall surface on the rear side, and two inner wall surfaces connecting the wall surface on the near side and the wall surface on the rear side. The nozzle consists of a front nozzle and a depth nozzle. The front nozzle is provided on the wall surface on the front side. The depth nozzle is provided on a protrusion protruding from the wall surface on the depth side. The protruding part is spaced apart from the two inner wall surfaces.

In such a hand dryer, the air blown from the nozzle hits the hand, reverses on the bottom surface of the drying chamber, and rises along the wall surface on the rear side. Alternatively, the air blown from the nozzle reverses when it hits the hand, goes to the wall surface on the deeper side, and merges with the rising air. Therefore, the air rising along the wall surface on the depth side is blocked by the protruding portion provided with the depth nozzle, and the flow of air to the hand inlet side is blocked. The result is that water droplets do not adhere to the wall surface on which the hand dryer is arranged.

Description of drawings

Fig. 1 is a perspective view of a hand dryer according to an embodiment of the present invention.

Fig. 2 is a side structural view of the hand drying device.

Figure 3 is a top view of the hand dryer.

Fig. 4 is a front structural view of the hand dryer.

Fig. 5 is a partial perspective view of the upper part of the hand dryer.

Fig. 6 is a side sectional view and an enlarged view of a nozzle portion of the hand dryer.

Fig. 7 is a front view of a nozzle portion of the hand dryer.

Detailed ways

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

(implementation mode)

Fig. 1 is a perspective view of a hand dryer according to an embodiment of the present invention, and Fig. 2 is a side configuration view of the hand dryer. As shown in FIGS. 1 and 2 , the hand drying device of this embodiment has a drying chamber 2 , an electric blower 3 , and a nozzle 4 . The drying chamber 2 here has a hand opening 1 which is open to the upper exterior 21 . The electric blower 3 sends air 22 to the nozzle 4 . Nozzle 4 sprays air 22 into drying chamber 2 . The hand in the drying chamber 2 reaches the inlet 1, and the hand is drawn in or out. In addition, the high-pressure air 22 of 0.5 kPa to 15 kPa blown out from inside the drying chamber 2 dries the hand that was inserted. In addition, the hand dryer is installed on the wall surface of the washroom, etc., and the user stands and puts his hand into the front (direction opposite to the direction of the wall surface).

As shown in FIG. 2 , the drying chamber 2 is provided with a nozzle 4 for blowing out the air 22 sent from the electric blower 3 into the drying chamber 2 . The nozzle 4 is comprised from the front nozzle 4a provided in the wall surface 2a of the front side of the drying chamber 2, and the depth nozzle 4b.

In addition, as shown in Figure 1, the drying chamber 2 is composed of the wall surface 2a (the front wall surface of the drying chamber 2) on the near side, the wall surface 2b (the rear wall surface of the drying chamber 2) on the deep side, and the wall surface 2a connecting the near side and the deep side. The four wall surfaces of the two inner wall surfaces 2c and 2d of the wall surface 2b are formed.

Fig. 3 is a top view of the hand dryer according to the embodiment of the present invention. As shown in FIG. 3, the front nozzle 4a is provided in the front side wall surface 2a of the drying chamber 2. As shown in FIG. The front nozzle 4a having a plurality of holes is integrally formed with the wall surface 2a on the front side. Moreover, the protrusion part 5 provided with the depth nozzle 4b which has a some hole is provided in the wall surface 2b of the depth side so that it may protrude in the drying chamber 2. As shown in FIG. The vertical cross section of the protruding portion 5 has a substantially triangular shape. The outlet of the deep nozzle 4b of the protruding part 5 is provided on the top of the protruding part 5, and is located closer to the user than the wall surface 2b on the deep side of the drying chamber 2. As shown in FIG.

The height of the protruding portion 5 , that is, the height from the wall surface 2 b on the deep side to the top of the protruding portion 5 may be 5 mm to 30 mm, preferably 20 mm. When the height of the protruding portion 5 is ensured to be about 5 mm, there is an effect that the air flow rising along the wall surface 2b on the rear side is blocked. On the other hand, as shown in FIGS. 2 and 3 , when the height of the protruding portion is set large, a space in the depth direction is ensured at a position closer to the bottom surface 6 of the drying chamber 2 than the protruding portion 5 . Therefore, even if the hand reaches into the drying chamber 2 , it is difficult for the hand to touch the drying chamber 2 in the drying chamber 2 . However, the larger the height of the protruding portion 5, the larger the hand inlet 1 needs to be, resulting in a larger hand dryer. Therefore, the height of the protrusion part 5 shall be 30 mm or less, Preferably it is about 20 mm, and the size of a hand dryer can be suppressed. That is, the hand dryer is thinned.

Fig. 4 is a front structural view of the hand dryer according to the embodiment of the present invention. The protruding portion 5 has a left side wall 5c and a right side wall 5d as side surfaces facing the ceiling surface 5b and the inner wall surfaces 2c and 2d of the drying chamber 2, respectively. Spaces 7 are respectively provided between the inner wall surface 2c and the left side wall 5c and between the inner wall surface 2d and the right side wall 5d. That is, the protrusions 5 are provided with a space 7 separated from the two inner wall surfaces 2c and 2d, respectively.

The width of the space 7 may be 5 mm to 60 mm, preferably 40 mm. The width of the space 7 is ensured to be about 5 mm, and the air 22 divided left and right by the protruding portion 5 is discharged upward. On the other hand, the width of the space 7 is set large, whereby the width of the drying chamber 2 is ensured. Therefore, when a hand reaches into the drying chamber 2, it is difficult to touch the inner wall surfaces 2c, 2d in the drying chamber 2. As shown in FIG. However, when the width of the space 7 becomes larger, the hand inlet 1 also becomes larger, resulting in a larger hand dryer. Therefore, the size of the hand dryer can be suppressed by making the width of the space 7 60 mm or less, preferably about 40 mm. That is, the miniaturization of the hand drying device.

Moreover, as shown in FIG. 2, the wall surface 2a of the front side of the drying chamber 2, and the wall surface 2b of the back side are substantially parallel. In addition, the number of outlets of the front nozzle 4a is larger than the number of outlets of the depth nozzle 4b. That is, the air volume blown out from the depth nozzle 4b is smaller than the air volume blown out from the front nozzle 4a.

As shown in FIG. 2 , in the drying chamber 2 , a hand-drawing inlet 1 is provided on the upper part, and hands are inserted downward from the hand-drawing inlet 1 . Here, under the natural stretching posture that is not forced, when the hand is stretched in from the hand stretching inlet 1, the palm side is often stretched toward the front side (opposite direction to the wall direction). That is, the air 22 blown out from the depth nozzle 4b hits the back of the hand, and the air 22 blown out from the front nozzle 4a hits the palm side.

In addition, as shown in FIG. 2 , inside the body shell 20 , intake air is sucked into the electric fan 3 through the filter 10 and the intake air passage 11 , and is blown out from the discharge air passage 12 through the discharge air chamber 13 from the nozzle 4 .

As shown in FIG. 1 , the drying chamber 2 has a human body sensing sensor 14 for detecting hands. It is detected that the hand is stretched into the drying chamber 2 from the hand opening 1, and the operation of the electric blower 3 shown in FIG. 2 is started. In addition, when it is detected that the hand is pulled out from the drying chamber 2, the operation of the electric blower 3 is terminated.

With such a structure, as shown in FIG. 2 , a part of the air 22 blown out from the front nozzle 4 a hits the palm of the hand, and flows toward the bottom surface 6 of the drying chamber 2 . And, as shown in FIG. 4 , the air 22 reverses after colliding with the bottom surface 6, flows toward the hand opening 1 direction, hits the bottom wall 5e of the protruding portion 5, and flows to the left side wall 5c and the right side wall 5d side of the protruding portion 5. . Therefore, air 22 going to a position above the protruding portion 5 is blocked. At this time, the splashing of the water droplets splashed from the hand to the upper side of the protruding portion 5 is also blocked.

Moreover, as shown in FIG. 2, a part of the air 22 blown out from the deep nozzle 4b hits the back of the hand, turns over, and flows toward the direction of the wall surface 2b on the deep side of the drying chamber 2. And, as shown in FIG. 4, the air 22 rises from the bottom surface 6 side, merges with the air 22 that hits the bottom wall 5e of the protruding part 5, and goes along the left side wall 5c, the right side wall 5d and the space 7 of the protruding part 5. Out of drying room 2.

Thus, the protruding part 5 functions to block the air 22 going upward from the bottom surface 6 side of the drying chamber 2 and discharge the air 22 from the space 7 . Therefore, water droplets do not adhere to the wall surface on which the hand dryer is installed.

In addition, the number of front nozzles 4a shown in FIG. 3 is larger than the number of depth nozzles 4b. Therefore, the quantity of the air 22 blown out from the front nozzle 4a increases, and in the drying chamber 2, the air 22 flows toward the wall surface 2b side of the back side. Therefore, the air 22 flowing along the wall surface 2b on the rear side shown in FIG. 4 hits the bottom wall 5e of the protruding portion 5 and is easily discharged from the inner wall surfaces 2c and 2d.

In addition, in this embodiment, the number of the front nozzles 4a is larger than the number of the depth nozzles 4b, and the air volume from the nozzles 4 differs. However, even if the hole diameter of the front nozzle 4a is enlarged, and the shape such as a long hole is changed instead of a round hole, the difference in the air volume will not be changed.

In addition, as shown in FIG. 4 , the left side wall 5c and the right side wall 5d of the protruding portion 5 are inclined outward as they go upward. That is, the length from the left side wall 5c to the right side wall 5d becomes longer as it goes from the lower part to the upper part of the protruding part 5 . Therefore, the air 22 flowing on the wall surface 2 b on the deep side of the drying chamber 2 flows according to the inclination of the left side wall 5 c and the right side wall 5 d of the protrusion 5 , and easily goes to the space 7 . The result is that the drying time is maintained and the blowing of air 22 and water droplets back to the user and the wall where it is placed is reduced.

In addition, as shown in FIG. 4 , the top surface 5 b of the protruding portion 5 is inclined upward as it goes deeper from the front. That is, the top surface 5b has an inclination which descends from the wall surface 2b on the rear side. Moreover, as shown in FIG. 2, the junction part 5a of the top surface 5b and the wall surface 2b of the back side is bent. That is, in the joint portion 5a, the top surface 5b and the wall surface 2b on the rear side are connected so as to be bent at a predetermined angle of 90° to 120° so as to attenuate the momentum of the air 22 .

With such a structure, a part of the air 22 blown out from the depth nozzle 4b is reversed when it hits the hand, and flows in the direction of the wall surface 2b on the depth side of the drying chamber 2 . A part of the air 22 flows along the top surface 5b of the protruding part 5, and when it hits the curved part of the joining part 5a, the direction of the air 22 is changed to the upper side of the inlet 1, and the momentum of the air 22 is rapidly attenuated. The result is that the drying time is maintained and the blowing of air 22 and water droplets back to the user and the wall where it is placed is further reduced.

Moreover, as shown in FIG. 2, the depth nozzle 4b blows out to the position below the front nozzle 4a. Therefore, the air 22 from the depth nozzle 4b flows to a position below the front nozzle 4a. Then, the air 22 flows down the front side wall surface 2 a of the drying chamber 2 , reverses on the bottom surface 6 of the drying chamber 2 , and rises along the deep side wall surface 2 b of the drying chamber 2 . Then the air 22 is blocked by the bottom wall 5e of the protrusion 5, and goes out of the drying chamber 2 from the space 7 shown in FIG. 4 . That is, when the air 22 blown from the deep nozzle 4b shown in FIG. 2 collides with the wall surface 2a on the front side, it is blocked by the air blown from the front nozzle 4a, and its direction is changed downward. Therefore, the amount of air 22 blown upward from the wall surface 2 a on the near side can be suppressed. Therefore, the phenomenon that air 22 and water droplets are blown back to the user can be further reduced.

Next, the structure of the protrusion part 5 is demonstrated using FIGS. 5-7.

5 is a partial perspective view of the upper part of the hand dryer according to the embodiment of the present invention, FIG. 6 is a side sectional view and an enlarged view of the nozzle portion of the hand dryer, and FIG. 7 is a front view of the nozzle portion of the hand dryer. As shown in FIGS. 5 and 7 , the protruding portion 5 is composed of a main body having a substantially triangular cross-section and a flange 15 protruding around it. In addition, an opening 17 for inserting the protruding portion 5 is provided on the wall surface 2b on the rear side. In addition, on the back side of the drying chamber 2, a space for contacting the flange 15 is provided. On the surface of the flange 15 that is in contact with the drying chamber 2 , protrusions 16 for welding are provided on the entire circumference of the flange 15 .

As shown in FIG. 6 , which is a cross section of the opening 17 , the protruding portion 5 protrudes into the drying chamber 2 from the opening 17 . The protrusion 16 and the back side of the drying chamber 2 are melted and bonded by ultrasonic welding or heat welding, and are closely bonded, and the protruding portion 5 is integrally formed with the drying chamber 2 . In addition, the drying chamber 2 and the protruding part 5 are formed of resin so that they can be welded.

At this time, in order to prevent the molten resin from splashing from the opening 17 to the drying chamber 2 side, the distance A from the gap 25 formed between the wall surface 2b on the rear side and the protruding portion 5 to the protrusion 16 is 0.5 mm or more. In this embodiment, the distance A is 1.5 mm.

In addition, in this embodiment, two protrusions 16 are provided, but one may be provided depending on the size of the nozzle 4 and the welding range.

In addition, the distance C between protrusions is 0.5 mm or more. In this embodiment, the distance C between protrusions is 1 mm. In addition, the width B of the cross section of the protrusion 16 is 0.2 mm or more, and the height D is 0.2 mm or more. In this embodiment, the protrusion 16 is a triangle having a width B of 0.5 mm and a height D of 1 mm.

Therefore, the turbulent flow (turbulent flow) of the air 22 which occurs when the air 22 collides with the gap 25 and the step between the protruding part 5 and the drying chamber 2 disappears. As a result, the drying time is maintained, the phenomenon that the air 22 and water droplets are blown back to the user can be further eliminated, and the leakage of the air 22 from the gap 25 can be prevented.

In addition, considering the leakage of air 22 due to variation in welding and the absence of welding equipment, it can be set as follows. That is, the rib 18 of the protruding portion 5 extends to a position closer to the discharge air chamber 13 than the flange 15 , and the rib 19 is provided on the outer periphery of the opening 17 on the discharge air chamber 13 side. Then, the protrusion 5 protrudes from the opening 17 into the drying chamber 2 . Then, the recess formed on the entire circumference between the rib 18 and the rib 19 is filled with an adhesive to prevent leakage of the air 22 .

In addition, when the hand protrudes from the drying chamber 2 to a position below the protruding part 5 , the back side of the hand protrudes into the space below the protruding part 5 . In the position below the protruding portion 5, a larger space is formed in the depth direction, so the drying time is maintained, and the phenomenon of water droplets adhering to the wall surface where the hand drying device is installed is also reduced, and the hand does not touch the drying chamber 2.

Industrial availability

The hand drying device of the present invention can be used not only for drying hands but also for industrial drying applications that use nozzles for equipment drying machines, that is, for drying objects in a short period of time.

Explanation of reference signs

1 hand reach entrance

2 drying room

2a The wall on the front side

2b The wall surface on the depth side

2c, 2d inner wall surface

3 electric fan

4 nozzles

4a front nozzle

4b Deep nozzle

5 protrusions

5a joint

5b top surface

5c left side wall

5d right wall

5e bottom wall

6 Bottom

7 space

10 filters

11 Suction air path

12 Exhaust air path

13 exhaust air chamber

14 human body sensing sensor

15 flange

16 protrusions

17 openings

18, 19 ribs

20 body outline

21 external

22 air

25 clearance

Claims (6)

1. A hand drying device, characterized in that, comprising: a drying chamber having a hand access opening outwardly upwards, through which the hand is inserted and withdrawn; nozzles for ejecting air into said drying chamber; and an electric fan delivering said air to said nozzle, The drying chamber is formed of four wall surfaces, a wall surface on the near side, a wall surface on the deep side, and two inner wall surfaces connecting the wall surface on the near side and the wall surface on the deep side, The nozzle is composed of a front nozzle and a depth nozzle, The front nozzle is arranged on the wall surface on the front side, The depth nozzle is provided on a protrusion protruding from the wall surface on the depth side, The protruding portion is spaced apart from the two inner wall surfaces respectively. 2. The hand drying device according to claim 1, characterized in that: The protruding portion has a left side wall and a right side wall respectively opposite to the two inner wall surfaces, The length from the left side wall to the right side wall increases from the lower portion to the upper portion of the protruding portion. 3. The hand drying device according to claim 1, characterized in that: The protruding portion has a top surface inclined downward from the wall surface on the depth side. 4. The hand drying device according to claim 3, characterized in that: The top surface and the wall surface on the depth side are connected at a predetermined angle. 5. The hand drying device according to claim 1, characterized in that: The depth nozzle blows the air below the front nozzle. 6. The hand drying device according to claim 1, characterized in that: The protrusion is joined to the drying chamber by welding.