WO2014156091A1

WO2014156091A1 - Hand drying device

Info

Publication number: WO2014156091A1
Application number: PCT/JP2014/001620
Authority: WO
Inventors: 井上　大輔; 幸司新崎
Original assignee: パナソニック株式会社
Priority date: 2013-03-27
Filing date: 2014-03-20
Publication date: 2014-10-02
Also published as: JP6387529B2; JPWO2014156091A1; CN105025766A; HK1216290A1; CN105025766B

Abstract

This hand drying device is provided with: a main body (30); an electrically-driven air blower (2) provided inside the main body (30), at a front surface (30a) side; and an air-outlet nozzle (3) provided to an undersurface (21). The undersurface (21) is an inclined surface slanting upward from a rear surface (30b) to the front surface (30a). Furthermore, a portion of an intake air duct (9) from a bottom-surface inlet (7) to a fan inlet (6) is provided along the undersurface (21). A filter case (11) intersecting the intake air duct (9) is disposed in the intake air duct (9) along the undersurface (21).

Description

Hand dryer

The present invention relates to a hand dryer.

In recent years, hand dryers have been installed in various places due to the upsizing and diversification of washrooms and the growing awareness of energy saving. Such a hand-drying device is desired to have a thin product for the purpose of harmonizing the design of the entire wash space and installing it in a narrow space.

In the case of drying a wet hand, the conventional hand drying apparatus blows off water droplets on the surface by causing a blown air current to collide with the hand inserted in the hand drying chamber to dry the hand. Since the water droplets blown off are scattered around, the air suction port of the hand dryer needs to be provided at a position where the scattered water droplets are difficult to enter. Therefore, in the conventional hand drying apparatus, an air suction port is provided on the bottom surface, and a suction airflow is passed through the back of the hand drying chamber so that scattered water droplets are difficult to be sucked from the air suction port (for example, Patent Document 1). reference).

Hereinafter, description will be made with reference to FIG. 7 which is a side sectional view of a conventional hand dryer. As shown in FIG. 7, the hand dryer is attached to the wall surface 101 and includes an electric blower 102 that sends out a high-pressure (0.5 kPa to 15 kPa) airflow. Further, a sensor 113 for detecting the inserted hand 112 is provided on the upper surface of the drying chamber 111 that opens outward. When the sensor 113 detects the hand 112, the electric blower 102 starts operation.

Further, a filter case 108 having a filter is disposed in a back space 109 between the fan suction port 105 and the wall surface 101 of the electric blower 102. When the electric blower 102 starts operation, the suction airflow 104 flows from the suction port 103 provided near the wall surface 101 on the bottom surface of the hand dryer. The suction air flow 104 is guided to the back side of the main body through the back side of the drying chamber 111.

Then, the suction airflow 104 flows into the filter case 108 from the back side toward the front side. When the suction air flow 104 passes through the filter case 108, the direction of the air flow is changed and flows out from the upper part of the filter case 108. The suction airflow 104 that has passed through the filter case 108 flows into the main body of the hand dryer from the fan suction port 105. The suction air flow 104 flowing into the main body is boosted by the electric blower 102 and then sent out as a blown air flow 107 from a nozzle 106 provided in the vicinity of the manual insertion port 110.

JP 2004-290529 A

In such a conventional hand drying apparatus, the lower space of the electric blower 102 is used as a space for the drying chamber 111 and the sensor 113 for detecting the hand 112. And the filter case 108 provided with the filter is arrange | positioned in the back space 109 between the fan inlet 105 of the electric blower 102, and the back surface of a main body. Therefore, when the main body is thinned, it is necessary to make the filter case 108 smaller as the back space 109 becomes smaller. As a result, there is a problem that the air flow velocity in the vicinity of the filter case 108 increases and the pressure loss of the filter case 108, that is, the suction air passage becomes large.

Therefore, the hand drying device of the present invention has a main body provided with a front surface, a back surface, and a lower surface, an electric blower provided on the front side inside the main body, and a blowing nozzle provided on the lower surface, and blown out from the blowing nozzle. Dry hands by blowing air. The lower surface is an inclined surface having an upward gradient from the back surface to the front surface. Also, a bottom suction port is provided on the back side of the bottom surface, and a part of the suction air path from the bottom suction port to the fan suction port of the electric blower is provided along the bottom surface. And the filter case which crosses a suction air path is arrange | positioned at the suction air path along the lower surface.

In such a hand dryer, a suction air passage and a filter case are arranged above the lower surface. Therefore, even if the main body is thinned, sufficient space for the suction air passage and the filter case is ensured. As a result, the air flow velocity in the vicinity of the filter case does not increase, and the pressure loss in the suction air passage does not increase.

FIG. 1 is a side cross-sectional view of a hand dryer according to Embodiment 1 of the present invention. FIG. 2 is a rear perspective view of the same hand dryer. FIG. 3 is a side cross-sectional view of the hand dryer 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 apparatus 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 drying apparatus.

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

(Embodiment 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 FIGS. 1 and 2, the hand dryer has a main body 30, an electric blower 2, and a blowout nozzle 3.

Here, the main body 30 has a box shape including a front surface 30a, a back surface 30b, and a lower surface 21. The back surface 30 b faces the wall surface 1, and the main body 30 is provided on the wall surface 1. The electric blower 2 is provided on the front surface 30 a side inside the main body 30. The blowing nozzle 3 is provided on the lower surface 21. Then, the hand drying device dries the hand 5 by the blown airflow 4 blown from the blowout nozzle 3.

Further, the lower surface 21 is provided with a sensor 41 for detecting the hand 5 on the back surface 30b side with respect to the blowing nozzle 3. When the sensor 41 detects the hand 5, the electric blower 2 starts operation. The electric blower 2 is a turbo centrifugal blower. In addition, the electric blower 2 is provided in the main body 30 with the fan suction port 6 facing the back surface 30b, and is disposed near the center in the main body width direction.

When the electric blower 2 is operated, the pressure of the air 8 flowing into the electric blower 2 is increased, and the high-pressure blown airflow 4 of about 0.5 kPa to 15 kPa is sent from the blowout nozzle 3 toward the lower side of the main body 30. . The user stands in front of the hand dryer and holds the wet hand 5 after hand washing over the blow nozzle 3. The blown airflow 4 delivered from the blowout nozzle 3 collides with the wet hand 5, blows off moisture, evaporates it, and dries the hand 5.

Here, the lower surface 21 is inclined in a direction away from the electric blower 2 toward the installed wall surface 1. In other words, the lower surface 21 is an inclined surface having an upward gradient from the back surface 30b toward the front surface 30a. The inclination angle 50 of the lower surface 21 at this time needs to take into account the draft angle of the mold and the arrangement space of the electric blower 2 and is in the range of 2 ° to 20 °.

Further, bottom suction ports 7 are provided on the left and right sides of the lower surface 21. Here, “toward” is a direction facing the main body 30 when the user inserts the hand 5. That is, the bottom suction port 7 is provided on the back surface 30 b side of the lower surface 21.

Further, a suction air passage 9 from the bottom surface suction port 7 to the fan suction port 6 of the electric blower 2 is provided. The bottom suction port 7 is provided in the vicinity of the wall surface 1. Further, a part of the suction air passage 9 is provided along the lower surface 21.

When the hand dryer is operated as shown in FIG. 2, the air 8 sucked from the bottom suction port 7 passes through the suction air passage 9 and gathers along the lower surface 21 from the left and right to the center. Thus, the lower center portion of the main body 30 serves as a merging portion 10 of the suction air passage 9. The junction 10 is formed by being drawn from the back surface 30b side of the main body 30 to the front surface 30a side. A filter case 11 is provided at the junction 10. Therefore, the airflow 19 having a high wind speed immediately after flowing in from the bottom suction port 7 does not immediately flow into the filter case 11. Thus, the filter case 11 is disposed in the suction air passage 9 along the lower surface 21 so as to cross the suction air passage 9. In other words, the filter case 11 protrudes from the portion along the lower surface 21 of the suction air passage 9. A filter is detachably disposed in the filter case 11.

Further, as shown in FIG. 1, the filter case 11 is provided with the suction surface facing the back surface 30 b of the main body 30. The airflow 19 in the suction air passage 9 before and after the filter case 11 flows along the lower surface 21 and faces each other. That is, the suction air passage 9 faces the rectifying wall surface 22. The filter case 11 is arranged such that the upper end portion 11a on the back surface 30b side is closer to the back surface 30b than the lower end portion 11b on the back surface 30b side, and is perpendicular to the inclined lower surface 21, that is, inclined with respect to the vertical direction. Therefore, the surface of the filter case 11 through which the airflow 19 passes has a large surface area. As a result, the velocity of the airflow 19 passing through the filter case 11 does not increase, and the pressure loss does not increase.

Further, the distance between the lower end portion 11 b of the filter case 11 and the wall surface 1 may be larger than the distance between the fan suction port 6 and the wall surface 1. That is, as shown in FIG. 1, the distance between the wall surface 1 and the fan suction port 6 is the distance A, the distance between the wall surface 1 and the lower end portion 11 b of the filter case 11 is the distance B, and the suction port wall surface between the wall surface 1 and the bottom surface suction port 7. If the distance to 9a is a distance C, the distance B may be longer than the distance A and the distance C. With such a configuration, the suction air passage 9 detours from the bottom surface suction port 7 toward the electric blower 2. As a result, the rotational sound of the electric blower 2 and the sound of the airflow 19 in the suction air passage 9 are less likely to leak out of the main body 30 and the sound insulation is improved. In addition, even if foreign matter enters from the bottom surface suction port 7, the entry of foreign matter into the electric blower 2 is suppressed, so that the product life is increased.

The lower surface 21 is provided with an attachment / detachment opening 18 for the filter case 11, and the filter case 11 can be attached / detached from the lower surface 21 obliquely to the front side in the vertical direction. Therefore, the suction air passage 9 does not have a complicated configuration.

The suction air passage 9 after passing through the filter case 11 is provided along the electric blower 2 inside the main body 30. The air 8 flowing through the suction air passage 9 is sucked into the electric blower 2 from the fan suction port 6 directed to the back surface 30b side of the main body 30.

In this way, the suction air passage 9 and the filter case 11 are arranged in the space inclined in the direction away from the electric blower 2 in the main body 30. Therefore, the space for the suction air passage 9 and the filter case 11 can be secured, and the main body 30 can be made thin. Further, since the surface area of the filter case 11 can be increased, the speed of the airflow 19 passing through the filter case 11 is suppressed, and the pressure loss in the filter case 11 is reduced.

As described above, even if the hand dryer according to Embodiment 1 of the present invention is thinned, the pressure loss due to the filter and the filter case 11 does not increase, and the pressure loss of the suction air passage 9 does not increase.

In the first embodiment, the suction air passage 9 after passing through the filter case 11 is formed by the rectifying wall surface 22 not in contact with the lower surface 21, but the rectifying wall surface 22 may be provided on the lower surface 21. In this case, the filter case 11 may be provided to face the side surface of the main body 30 without facing the back surface 30 b of the main body 30.

(Embodiment 2)
In the second embodiment of the present invention, the same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. FIG. 3 is a side cross-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 FIGS. 3 and 4, the hand drying apparatus of the second embodiment is provided with a water receiver 12 at the lower part of the main body 30 of the first embodiment, and a drying chamber 13 is formed. That is, a water receiver 12 that receives the blown air flow 4 blown from the blower nozzle 3 and receives the blown water is provided at the lower portion of the main body 30. The water receiver 12 and the main body 30 are connected on the back surface 30b side, and the drying chamber wall surface 14 is formed. The drying chamber 13 is surrounded by the water receiver 12, the lower surface 21, and the drying chamber wall surface 14.

As described above, the main body 30 further includes the drying chamber wall surface 14 extending downward from the lower surface 21 to the back surface 30b and the water receiver 12 continuing to the drying chamber wall surface 14.

Water receiving suction ports 15 are provided at the lower portions on both the left and right sides of the water receiving 12. Here, “toward” is a direction facing the main body 30 when the user inserts the hand 5 as in the first embodiment. On both sides of the drying chamber wall surface 14, there are provided side suction air passages 16 that allow the water receiving suction port 15 and the bottom suction port 7 provided in the main body 30 to communicate with each other.

Also, an attachment / detachment opening 18 for attaching / detaching the filter case 11 is provided on the lower surface 21. The filter case 11 is provided so as to be inclined with respect to the back surface 30b so that the filter case 11 can be attached / detached from the attachment / detachment opening 18 toward the manual insertion opening 13a of the drying chamber 13.

With the above configuration, the filter case 11 is removed by pulling it toward the manual insertion port 13a (front opening portion) of the drying chamber 13. Therefore, it becomes difficult for the hand 5 to contact the water receiver 12, and the filter case 11 is removed.

Furthermore, since the filter case 11 is provided to be inclined with respect to the back surface 30b, the area of the filter case 11 can be increased, and the airflow 19 can easily pass through the filter or the filter case 11. That is, the maintenance of the filter case 11 is facilitated, and the pressure loss of the suction air passage 9 is not increased.

Thus, according to the hand drying apparatus of Embodiment 2 of the present invention, even if the main body 30 is thinned, the pressure loss of the suction air passage 9 does not increase, and maintenance is facilitated.

(Embodiment 3)
In the third embodiment of the present invention, the same components as those in the first and second embodiments are denoted by the same reference numerals, detailed description thereof will be omitted, and only different points 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 FIGS. 5 and 6, the water receiving cup 53 is provided under the water receiving portion 12, avoiding directly under the water receiving inlet 15. For example, the water receiving cup 53 has a concave shape along the shape of the water receiving suction port 15 so as not to block the water receiving suction port 15.

Although the water receiving cup 53 has a concave shape in FIG. 6, an opening may be provided in the water receiving cup 53 immediately below the water receiving inlet 15.

The water receiving inlet 15 is provided in the lower part on the back surface 30b side of the water receiving 12. A drain 51 is provided at the bottom of the water receiver 12. And the water receiving cup 53 which receives the water drained from the drain outlet 51 is arrange | positioned avoiding the direct under of the water receiving inlet 15 under the water receiver 12. The water receiving cup 53 is detachable from the main body 30.

Thus, by providing the water receiving cup 53 without blocking the water receiving / suction port 15, the pressure loss of the suction air passage 9 does not increase, and the drained water is stored to some extent. As a result, the frequency of maintenance is reduced, and performance degradation due to increased pressure loss is prevented.

Further, a water receiving cup filter case 54 is provided in the water receiving cup 53 directly below the water receiving inlet 15. As a result, an increase in pressure loss due to the suction air passage 9 being narrowed due to the entry of foreign matter from the water receiving inlet 15 is prevented.

Also, when the water collected in the water receiving cup 53 is drained, the filter disposed in the water receiving cup filter case 54 can be cleaned, so that clogging of the filter is suppressed. In this way, performance degradation due to intrusion of foreign matter is prevented and maintenance is facilitated.

A water receiving cup cover 52 is provided between the water receiving 12 and the water receiving cup 53. The water receiving cup cover 52 has a lid shape that covers the upper surface of the water receiving cup 53, and the water receiving cup 53 is attached and detached. The water receiving cup cover 52 is provided with a drain opening 55. The water drained from the drain port 51 flows to the water receiving cup 53 through the drain opening 55.

Since the water receiving cup cover 52 is provided in the water receiving cup 53, when the water collected in the water receiving cup 53 is drained at the time of maintenance, it becomes difficult for water to spill.

The hand dryer of the present invention is an industrial dryer that dries an object in a short time by diverting it to equipment drying equipment using a nozzle structure, in addition to the purpose of hand drying used in toilets, toilets, kitchens, etc. It can also be applied to applications.

DESCRIPTION OF SYMBOLS 1 Wall surface 2 Electric blower 3 Blowing nozzle 4 Blowing airflow 5 Hand 6 Fan suction port 7 Bottom suction port 8 Air 9 Suction air path 9a Suction port wall surface 10 Merge part 11 Filter case 11a Upper end part 11b Lower end part 12 Water receiver 13 Drying chamber 13a Hand insertion port 14 Drying chamber wall surface 15 Water inlet port 16 Side inlet air passage 18 Removable port 19 Air flow 21 Lower surface 30 Main body 30a Front surface 30b Rear surface 50 Inclination angle 51 Drain port 52 Water receiving cup cover 53 Water receiving cup 54 Water receiving cup filter Case 55 Drain opening

Claims

A body with front, back and bottom surfaces;
An electric blower provided on the front side inside the main body;
A blowout nozzle provided on the lower surface,
A hand drying device that dries the hand by the air flow blown from the blow nozzle,
The lower surface is an inclined surface with an upward slope from the back surface toward the front surface, and a bottom surface suction port is provided on the back surface side of the lower surface,
A part of the suction air path from the bottom surface suction port to the fan suction port of the electric blower is provided along the lower surface,
A hand-drying device, wherein a filter case that crosses the suction air passage is disposed in the suction air passage along the lower surface.
The hand dryer according to claim 1, wherein an upper end portion of the filter case is closer to the back surface than a lower end portion.
The hand dryer according to claim 1, wherein airflows in the suction air passages before and after the filter case face each other.
The hand dryer according to claim 1, wherein an attachment / detachment port for attaching / detaching the filter case is provided on the lower surface.
The main body further includes a drying chamber wall surface connected to the back surface downward from the lower surface, and a water receiver connected to the drying chamber wall surface, and a drying chamber surrounded by the water receiver, the lower surface, and the drying chamber wall surface is provided. An attachment / detachment port for attaching / detaching the filter case is provided on the lower surface, and the filter case is inclined with respect to the back surface and attached / detached from the attachment / detachment port toward the manual insertion port of the drying chamber. The hand dryer according to claim 1.
A water inlet is provided in the water receiver below the drying chamber wall surface,
A drain outlet is provided at the bottom of the water receiver,
The hand dryer according to claim 5, further comprising a water receiving cup that receives water drained from the drain outlet below the water receiver and directly below the water inlet.
The hand dryer according to claim 6, wherein a water receiving cup filter case is provided in the water receiving cup immediately below the water receiving inlet.
A water receiving cup cover is provided between the water receiving cup and the water receiving cup so as to cover the upper surface of the water receiving cup, and the water receiving cup is attached and detached.
A drain opening is provided in the water receiving cup cover,
7. The hand dryer according to claim 6, wherein the water drained from the drain port flows into the water receiving cup through the drain opening.