HK1216291B - Hand drying device - Google Patents

Description

Hand drying device

Technical Field

The present invention relates to a hand drying device.

Background

In the conventional hand drying device, when drying wet hands, the air flow is made to impinge on the hands extending into the hand drying chamber to blow water droplets on the surfaces of the hands, thereby drying the hands. When the user wants to dry each part of the hand, the user puts the hand into the inside of the hand drying chamber or rubs the hand in the hand drying chamber, and thus a wide hand drying chamber is desired.

On the other hand, since the blown water droplets are scattered around, the air inlet of the hand dryer needs to be provided at a position where the scattered water droplets are not likely to enter. Therefore, air inlets are provided on both sides of the bottom surface of the hand drying device, and air passages through which the intake air flows are provided on both sides of the back surface of the hand drying chamber (see, for example, patent document 1).

A conventional hand dryer will be described below with reference to fig. 7 and 8. Fig. 7 is a side sectional view of a conventional hand drying device, and fig. 8 is a rear view of the hand drying device. As shown in fig. 7 and 8, the hand dryer is attached to a wall surface 101, and includes an electric fan 102 that sends out a high-pressure (0.5kPa to 15kPa) airflow inside the hand dryer.

When the electric blower 102 starts operating, the suction airflow 104 flows into the main body of the hand drying apparatus from the suction ports 103 provided on both sides of the wall surface of the bottom surface of the hand drying apparatus. Then, the suction airflow 104 is boosted by the electric fan 102 and sent out as a blow-out airflow 107 from a nozzle 106 provided above the hand insertion opening 105. A filter case 108 in which a filter is disposed is provided in the vicinity of each suction port 103. The intake airflow 104 passes through the filter case 108, passes through the side intake air passages 110 on both sides of the back surface of the hand drying chamber 109, and merges above the hand drying chamber 109.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-180

Disclosure of Invention

In such a conventional hand drying device, when the side wall is reduced in order to increase the width of the hand drying chamber 109, the opening area of the upstream side suction port 103 and the cross-sectional area of the downstream side suction air passage 110 in which the two filter housings 108 are arranged need to be reduced. Therefore, the gas flow velocity in the filter case 108 increases, and there is a problem that the pressure loss in the filter case 108 increases.

Accordingly, the hand drying apparatus of the present invention comprises: a body having a front surface, a back surface, side surfaces, and a lower surface; an electric fan arranged in the main body; and a blow-out nozzle provided on the lower surface, the hand being dried by a blow-out airflow blown out from the blow-out nozzle. Bottom surface suction ports for sucking a suction airflow are provided on both side surfaces of the lower surface. A filter casing is provided on a front surface side of a merging portion where a plurality of intake airflows merge in an intake air passage from a bottom surface intake port to a fan intake port of an electric fan.

In such a hand dryer, the air passage cross-sectional area on the front surface side of the merging portion where the intake air passages from the left and right side surfaces merge becomes large, so that the air speed in the filter case is reduced, and the pressure loss is reduced.

Drawings

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

Fig. 2 is a rear perspective view of the hand dryer.

Fig. 3 is a side sectional view of the hand drying device according to embodiment 2 of the present invention.

Fig. 4 is a rear perspective view of the hand dryer.

Fig. 5 is a side sectional view of the hand drying device according to embodiment 3 of the present invention.

Fig. 6 is a partially exploded rear perspective view of the hand dryer.

Fig. 7 is a side sectional view of a conventional hand dryer.

Fig. 8 is a rear view of the hand drying device.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

(embodiment mode 1)

Fig. 1 is a side sectional view of a hand dryer according to embodiment 1 of the present invention, and fig. 2 is a rear perspective view of the hand dryer. As shown in fig. 1 and 2, the hand drying device includes a box-shaped main body 30, an electric blower 2, and a blow-out nozzle 3.

Here, the main body 30 is attached to the wall surface 1 such that the back surface 40 faces the wall surface 1. Further, the body 30 includes a front surface 39, a back surface 40, side surfaces 42, and a lower surface 43. The electric blower 2 is provided inside the main body 30. The blow-out nozzle 3 is provided on the lower surface 43 of the main body 30. The hand drying device dries the hand 5 by the airflow 4 blown out from the blow-out nozzle 3. The electric fan 2 is a centrifugal fan of a turbo type, and the fan inlet 6 faces the rear surface 40 side.

When the electric blower 2 is operated, the suction airflow 8 flowing into the electric blower 2 is boosted, and the jet air (blow-out airflow 4) having a high pressure of approximately 0.5 to 15kPa is sent out from the blow-out nozzle 3 to the lower side of the main body 30. The user stands on the front of the hand drying apparatus and the hands 5 moistened after washing are placed on the lower side of the main body 30. The air flow 4 sent out from the air blowing nozzle 3 blows off the moisture of the hand 5, evaporates the moisture, and dries the hand 5.

Bottom suction ports 7 communicating with a fan suction port 6 of the electric blower 2 are provided on both sides of the lower surface 43. That is, the bottom surface suction ports 7 through which the suction airflow 8 is sucked are provided on both side surfaces 42 of the lower surface 43.

Suction air passage 9 is an air passage extending from bottom surface suction port 7 to fan suction port 6 of electric fan 2. On the back surface 40 side of the main body 30, a merging portion 44 where a plurality of intake airflows 8 merge from the bottom surface intake ports 7 of both side portions is located in the intake air passage 9. The merged air flow 10 of the intake air flows 8 merged at the merging portion 44 flows into the electric blower 2 from the fan inlet 6 through the filter case 11. The filter can be attached to and detached from the filter housing 11.

The filter case 11 is disposed on the front surface 39 side of the joint portion 44. The suction air passage 9 is provided along the lower surface 43 of the main body 30.

The suction airflow 8 sucked from the bottom suction port 7 passes through the suction airflow passage 9 and is collected from left to right along the lower surface 43 of the main body 30 toward the center. The lower center of the main body 30 is a merging portion 44 of the intake air passage 9. An air passage is formed in the merging portion 44 so as to be drawn from the rear wall 41 of the main body 30 to the front surface 39 side in the intake air passage 9. The filter case 11 is provided on the front surface 39 side of the merging portion 44. The air passage cross-sectional area on the front surface 39 side of the merging portion 44 is larger than the sum of the air passage cross-sectional areas of the left and right intake air passages 9.

The suction air duct 9 through which the filter case 11 passes is provided along the electric fan 2 inside the main body 30. The suction airflow 8 is sucked into the electric blower 2 from the fan suction port 6 facing the rear surface 40 side of the main body 30.

With the above configuration, the intake air passage 9 merges to have a total of the two passage cross-sectional areas, so that the speed of the merged air flow 10 passing through the filter case 11 is reduced, and the pressure loss in the filter case 11 is reduced.

Further, since the suction air passage 9 is enlarged in the direction of the lower surface 43 of the main body 30, the cross-sectional area of the suction air passage 9 is increased, and the wind speed of the merged air flow 10 in the filter case 11 is reduced. The intake airflow 8 is collected from the left and right along the lower surface 43 of the main body 30 toward the center, and changes the wind direction so as to be the merged airflow 10 facing the filter case 11. Therefore, the merged gas flow 10 smoothly flows into the filter case 11, and the pressure loss in the filter case 11 is reduced.

(embodiment mode 2)

In embodiment 2 of the present invention, the same components as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted, and only different points will be described. Fig. 3 is a side sectional view of the hand dryer according to embodiment 2 of the present invention, and fig. 4 is a rear perspective view of the hand dryer.

As shown in fig. 3 and 4, the hand drying device of embodiment 2 is provided with a water receiving portion 12 at a lower portion of a main body 30 of the hand drying device of embodiment 1, and forms a drying chamber 13. That is, a water receiving portion 12 that receives the blowout air flow 4 blown out from the blowout nozzle 3 and receives blown-off water is provided at a lower portion of the main body 30. The water receiving unit 12 is connected to the main body 30 on the rear surface 40 side, and forms a drying chamber wall surface 14. The drying chamber 13 is formed to be surrounded by the water receiving portion 12, the lower surface 43 of the main body 30, and the drying chamber wall surface 14.

Water receiving portion suction ports 15 are provided at lower portions of both right and left sides toward the water receiving portion 12. Here, the "orientation" refers to a direction facing the main body 30 when the user inserts the hand 5. Side suction air ducts 16 for communicating the water collector suction port 15 and the bottom suction port 7 are provided on both side surfaces of the drying chamber wall surface 14.

Both side portions (right and left sides when facing the drying chamber 13) of the drying chamber wall surface 14 protrude forward, forming a drying chamber side wall 14 a. The inside of the drying chamber side wall 14a forms a side intake air passage 16. That is, the side suction air passage 16 is provided in the drying chamber side wall 14 a. Since the drying chamber wall surface 14 protrudes forward, water from the drying chamber 13 can be prevented from scattering when the hand drying device is used.

Thus, the main body 30 further includes a drying chamber wall 14 connected to the rear surface 40 from below the lower surface 43, a drying chamber side wall 14a connected to the side surface 42, and a water receiving portion 12 connected to the drying chamber wall 14 and the drying chamber side wall 14 a. The water receiving portion suction port 15 is provided in the water receiving portion 12 below the drying chamber sidewall 14 a.

The filter casing 11 is not provided in the side intake air passage 16, and is provided on the front surface 39 side of the merging portion 44 of the intake air passage 9 in the main body 30. That is, since the filter case 11 is not disposed in the side intake air passage 16, the cross-sectional area of the side intake air passage 16 can be reduced. Therefore, the drying chamber 13 is enlarged, and the side suction air passage 16 can be reduced in size. Thus, even if the drying chamber 13 is enlarged, the pressure loss of the filter case 11 is not increased.

The merging portion 44 of the intake air passage 9 is provided with a flow-straightening wall surface 17 on the top surface side of the main body 30 so as to form an air passage toward the inside of the main body 30. The rectifying wall surface 17 connects the upper side of the filter case 11 to the rear wall 41 of the main body 30. That is, the flow-straightening wall surface 17 is close to the wall surface 1, and the gap thereof is 0 to 10 mm.

With the above configuration, the intake airflow 8 merging from the left and right of the intake airflow passage 9 is restricted from flowing in the upward direction by the rectifying wall surface 17 at the merging portion 44 of the intake airflow passage 9. The direction of the intake airflow 8 is directed toward the filter case 11, and the intake airflow 8 is smoothly rectified and flows into the filter case 11. Therefore, the pressure loss of the filter case 11 is reduced. Further, the back surface wall 41 is closer to the main body 30 than the back surface 40.

Further, the lower surface 43 is provided with a mounting/dismounting port 18 for mounting/dismounting the filter case 11. The filter case 11 is provided obliquely with respect to the rear surface 40 so as to be attachable to and detachable from the attachment/detachment port 18 to the hand insertion port 13a of the drying chamber 13. That is, the filter case 11 is provided with a slope such that the rear side of the filter case 11 approaches the rear surface 40 from the near side with the attachment/detachment port 18 side as the near side.

According to the above configuration, when the filter housing 11 is attached and detached, the hand 5 is less likely to contact the drying chamber wall surface 14, and maintenance is facilitated. Further, the filter case 11 is inclined such that the upper portion thereof is closer to the suction side than the lower portion thereof, and the merged air flow 10 flows into the filter case 11 so as to face the filter case. Therefore, the merged gas flow 10 easily passes through the filter case 11, and the pressure loss in the filter case 11 is reduced. Thus, maintenance of the hand drying apparatus becomes easy, and the pressure loss of the filter housing 11 does not become large.

(embodiment mode 3)

In embodiment 3 of the present invention, the same components as those in embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted, and only the differences will be described. Fig. 5 is a side sectional view of a hand dryer according to embodiment 3 of the present invention, and fig. 6 is a partially exploded rear perspective view of the hand dryer.

As shown in fig. 5 and 6, the water receiving cup 53 is provided below the water receiving unit 12 so as to avoid a position right below the water receiving unit suction port 15. For example, the water receiving cup 53 has a concave shape along the shape of the water receiving portion suction port 15 so as not to block the water receiving portion suction port 15.

Although water receiving cup 53 has a concave shape in fig. 6, water receiving cup 53 may be provided with an opening directly below water receiving portion suction port 15.

A water receiving portion suction port 15 is provided at a lower portion of the back surface 40 side of the water receiving portion 12. A drain port 51 is provided at the bottom of the water receiving portion 12. The water receiving cup 53, which receives water discharged from the water discharge port 51, is disposed below the water receiving unit 12 and directly below the water receiving unit suction port 15.

In this way, the water receiving cup 53 is provided so as not to block the water receiving portion suction port 15, and thus the discharged water is accumulated to some extent without increasing the pressure loss in the suction air passage 9. As a result, the maintenance frequency is reduced, and the performance can be prevented from being lowered due to an increase in pressure loss.

A cup filter case 54 is provided to the cup 53 directly below the water receiving portion suction port 15. As a result, the side suction air passage 16 is prevented from being narrowed by intrusion of foreign matter from the water collector suction port 15, and the pressure loss is prevented from increasing. Further, since the filter disposed in the filter case 54 of the water receiving cup can be cleaned even when the water collected in the water receiving cup 53 is drained, clogging of the filter can be suppressed. Thus, the performance degradation due to the intrusion of foreign matter can be prevented, and the maintenance is also facilitated.

Further, water receiving cup cover 52 is provided between water receiving unit 12 and water receiving cup 53. Water receiving cup cover 52 is in the shape of a cover covering upper surface of water receiving cup 53, and water receiving cup 53 is detachable. Further, the water receiving cup cover 52 is provided with a drain opening 55. The water discharged from the drain port 51 flows into the water receiving cup 53 through the drain opening 55.

By arranging the water receiving cup cover 52 on the water receiving cup 53, water accumulated in the water receiving cup 53 during maintenance is not easy to overflow when the water is drained.

Industrial applicability of the invention

The hand drying device of the present invention can be used for industrial drying purposes for drying objects in a short time by being used as a facility drying machine using a nozzle structure in addition to the purpose of drying hands used in a toilet, a kitchen, and the like.

Description of the symbols

1 wall surface

2 electric fan

3 blow-out nozzle

4 blowing out an air flow

5 hand

6 suction inlet of fan

7 bottom suction inlet

8 suction airflow

9 suction air path

10 combined air flow

11 Filter housing

12 water receiving part

13 drying chamber

13a hand insertion opening

14 wall of drying chamber

14a drying chamber side wall

15 water receiving part suction inlet

16 side suction air path

17 rectification wall surface

18 dismounting hole

30 main body

39 front surface

40 back side

41 back wall

Side 42

43 lower surface

44 confluence part

51 drainage outlet

52 water receiving cup cover

53 water cup

54 water cup filter shell

55 drainage opening

Claims (8)

1. A hand drying apparatus comprising:

a body having a front surface, a back surface, side surfaces, and a lower surface;

an electric fan disposed inside the main body; and

a blow-out nozzle provided at the lower surface,

drying hands using a blow-off air flow blown out from the blow-off nozzle, wherein

A bottom surface suction port for sucking a suction airflow is provided on both the side surfaces of the lower surface, and a filter casing is provided in a suction airflow path from the bottom surface suction port to a fan suction port of the electric fan on the front surface side of a merging portion, the merging portion being a merging portion where the plurality of suction airflows merge, the filter casing being provided on the downstream side of the merging portion in the suction airflow path.

2. The hand drying apparatus of claim 1, wherein:

the suction air passage is provided along the lower surface.

3. The hand drying apparatus of claim 1, wherein:

the main body further comprises a drying chamber wall surface connected with the back surface from the lower surface below, a drying chamber side wall connected with the side surface, and a water receiving part connected with the drying chamber wall surface and the drying chamber side wall,

a drying chamber is formed and surrounded by the water receiving part, the lower surface and the wall surface of the drying chamber,

a water receiving part suction inlet is arranged on the water receiving part below the side wall of the drying chamber,

and a side suction air path for communicating the water receiving part suction port with the bottom suction port is formed in the side wall of the drying chamber.

4. A hand drying apparatus as claimed in claim 3, wherein:

a rectifying wall surface for rectifying the suction airflow is provided to connect the filter case and a rear wall of the main body.

5. A hand drying apparatus as claimed in claim 3, wherein:

the lower surface is provided with a dismounting port for dismounting the filter shell,

the filter housing is inclined with respect to the back surface and can be attached to and detached from the attachment/detachment port toward the hand insertion port of the drying chamber.

6. A hand drying apparatus as claimed in claim 3, wherein:

a water outlet is arranged at the bottom of the water receiving part,

a water receiving cup for receiving water discharged from the water outlet is arranged below the water receiving part and under the water receiving part suction port.

7. Hand drying apparatus according to claim 6, in which:

the water receiving cup is provided with a water receiving cup filter shell.

8. Hand drying apparatus according to claim 6, in which:

a water receiving cup cover is arranged between the water receiving part and the water receiving cup, the water receiving cup cover is in a cover shape covering the upper surface of the water receiving cup, the water receiving cup is detachable,

a water discharge opening is arranged on the water receiving cup cover,

water drained from the drain opening flows through the drain opening to the drip cup.