JPH1099234A - Hand drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent whistling sounds at drain holes in the drain pan of a hand drier. SOLUTION: This device is composed of a wind blower 4, a heater 5 to heat the wind blown from the wind blower, a jet nozzle 6 shrunk at the spout of the same and a basin 3 set with a spacing under the jet nozzle 6. On this basin 3 a drain hole 12 is made and a tube part 13 is set connected under the drain hole 12. Thus to prevent whistling or resonance sound occurred when the wind from the jet nozzle 6 passes through the drain hole 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand drying apparatus for washing hands in a washroom or a toilet and drying wet hands with warm air.

[0002]

2. Description of the Related Art Conventionally, a hand dryer of this type does not use a handkerchief or towel after using a toilet or washing dirty hands, and does not wet a pocket storing a handkerchief. An air-type hand drying device for drying hands has been put to practical use.

This hand drying device incorporates a blowing means and a heat generating means, and starts operation when a hand detecting means detects an outstretched hand, and dries the surface of a wet hand with warm air. I have. At this time, water droplets are scattered and wet the walls, floor and clothes, so as a preventive measure, a water receiving tray for receiving water droplets is placed below the blower nozzle, and a drain hole is formed in a part of this water receiving tray. In addition, water droplets that accumulate in the water tray when used continuously are drained from the drain holes. When there is no drain outlet nearby, a water receiving cup is provided below the water receiving tray to store water, and when the water is full, the water receiving cup is removed and drained.

[0004]

In such a conventional hand dryer, when the wind blown from the blow-off nozzle enters through the drain hole, the noise becomes abnormally high. Therefore, there is a demand for a hand dryer that does not generate noise from the drain hole.

[0005] In addition, the wind that has entered through the drain hole,
Because it is sprayed directly on the surface of the water collected in the water receiving cup, there is a problem that the water surface ripples and water spills,
There is a need for a configuration of a hand dryer that does not spill water.

SUMMARY OF THE INVENTION The present invention solves such a conventional problem, and reduces noise generated from a drain hole and prevents water from leaking from a water receiving cup even when warm air enters through the drain hole. The aim is to provide no hand drying equipment.

[0007]

In order to achieve the above object, a hand dryer according to the present invention comprises: a blowing means and a heating means housed in a main body; a blowing nozzle provided at a lower portion of the main body; A water receiving tray provided below the blow-off nozzle via a drying space, a drain hole formed in the water receiving tray, and a water receiving cup detachably provided below the drain hole; Since the cylindrical portion is formed integrally with the lower part of the drain hole, it is possible to obtain a hand dryer in which noise does not rise abnormally.

Another means has a lid for covering the upper surface of the water receiving cup and an inflow hole formed in the lid, and the inflow hole is provided at a position just below the drain hole of the water receiving tray. Therefore, it is possible to obtain a hand drying device that does not spill water accumulated in the water receiving cup.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is directed to a blower and a heat generator contained in a main body, a blower blowout nozzle provided at a lower portion of the main body, and a drying space below the blower blowout nozzle. A water receiving tray provided, a water draining hole formed in the water receiving tray, and a water receiving cup detachably provided below the water draining hole, and a tubular portion is integrally formed below the water draining hole. This cylinder prevents the hot air blown from the blow-off nozzle from rapidly diffusing when flowing from the drain hole of the water receiving tray to the water receiving cup, and generates a whistling sound. This has the effect of suppressing the noise resonated in the water receiving cup from spreading to the outside through the drain hole.

In addition, the upper surface of the water receiving cup is covered with a lid, and an inflow hole formed in the lid is provided at a position just below the drain hole of the water receiving tray, so that the water enters through the drain hole. It is possible to prevent the wind from being blown directly to the surface of the water accumulated in the water receiving cup and to prevent the wind from waving, thereby preventing water from spilling out of the water receiving cup.

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

[0012]

【Example】

(Embodiment 1) As shown in FIGS. 1 to 3, a main body 1 fixed to a wall is composed of a front case 2 and a water receiving tray 3 protruding from a lower portion. A drying space 2a is formed. A blower 4, a heat generator 5, and a controller 8 are provided in the front case 2,
At the lower end of the front case 2, a blowing nozzle 6 is installed facing the drying space 2 a and the water receiving tray 3. A detecting means 7 for detecting a hand inserted into the drying space 2a is provided in the vicinity of the blow-off nozzle 6 and the control means 8 drives and controls the blowing means 4 and the heating means 5 in response to a detection signal of the detecting means 7. doing.

The blower means 4 includes a blower 9b which is driven to rotate by a motor 9a. Between the blower means 4 and the blow-off nozzle 6, a PTC heater 5a as a heat-generating means 5 is provided.
5b is provided. A heating element housing frame 11 provided with a bypass air passage 10 is provided in parallel with the PTC heaters 5a and 5b,
On the downstream side, an air blowing nozzle 6 is provided in communication.

The water receiving tray 3 is formed in a dish shape so as to have a concave portion for receiving water droplets, and a water draining hole 12 is provided at the bottom of the concave portion for draining water. A tubular portion 13 is formed. The water receiving cup 14 is located below the drain hole 12 and is detachably attached to the water receiving tray 3. In addition, the main body 1 has a mounting bracket 15 fixed to a wall surface of a washroom or the like with a fixing tool 16 such as a screw, and an intake passage 18 having an intake port 17 is formed below the rear side of the main body 1. It becomes the air suction part.

In order to reduce noise generated from the main body 1, a sound absorbing material 19 is provided around the blowing means 4.

In the above structure, first, the blow-off nozzle 6
When the hand is inserted below the sensor, the detecting means 7 detects the hand and the detection output is turned on, and the blowing means 4 and the heat generating means 5 are operated via the control means 8 so that the temperature of the air from the blowing nozzle 6 is increased. Blow the wind. Part of the hot air passes through the drain hole 12 and enters the water receiving cup 14.
If there is no cylindrical portion 13, the intruding wind has a strong momentum, so that it suddenly discharges and diffuses from the drain hole 12 to easily generate a whistle sound, and this sound is generated when the water is trapped in the water receiving tray 3. The resonating sound is synthesized in the vicinity of the drain hole 12 to generate a loud noise. However, since the cylindrical portion 13 is formed below the drain hole 12, the operation of the cylindrical portion 13 can suppress generation of a whistle sound and dissipation of a resonance sound. This noise has a characteristic that it increases in proportion to the hole diameter of the drain hole 12 and decreases in proportion to the length of the cylindrical portion 13.

That is, assuming that the hole diameter of the drain hole 12 is d and the length of the cylindrical portion 13 is h, the relationship between the hole diameter d of the drain hole 12 and the noise (dB) of the hand dryer is represented by a parameter Length ratio h
/ D is shown in the characteristic diagram of FIG. 4, and the noise increases as the hole diameter d of the drain hole 12 increases. The characteristic curve (a)
Indicates a case where the cylinder portion 13 is not provided, and the cylinder length ratio h / d =
The characteristic curve (b) of 0.5 is about 3 times the characteristic curve (b).
The characteristic curve (c) for the cylinder length ratio h / d = 1 is about 4
It can be seen that the dB is reduced.

FIG. 5 is a characteristic diagram showing the relationship between the cylinder length ratio h / d and the noise (dB). As the cylinder length ratio h / d increases, the noise decreases, but the cylinder length ratio h / d increases. With one or more, the difference is almost eliminated.

Therefore, by forming a cylindrical portion 13 having the same diameter as the hole at the lower portion of the drainage hole 12, noise such as whistle sound and resonance sound is reduced, and the cylinder length ratio is set to h / d = 0.5. By doing so, the noise reduction effect can be further increased.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS.

The second embodiment is different from the first embodiment in that a lid 20 for covering the upper surface of the water receiving cup 14 is provided, and an inflow hole 21 opened in the lid 20 is provided immediately below the drain hole 12 of the water receiving tray 3. Is provided at the position where is removed. Further, an inclined groove 22 for guiding water droplets flowing down from the drain hole 12 to the inflow hole 21 is formed on the lid 20.
Is formed.

In the above configuration, when drying hands,
The water droplets attached to the water receiving tray 3 flow down the drain hole 12, flow along the inclined groove 22 formed in the lid 20 of the water receiving cup 14, and can be stored in the water receiving cup 14 from the inflow hole 21.

A part of the hot air blown from the blow-off nozzle 6 passes through the drain hole 12 and is
However, there is a cover 20 that covers the water receiving cup 14 immediately below the drainage hole 12 and the inflow hole 21 is provided at a position outside the position just below the drainage hole 12. It only diffuses and does not spray directly on the water surface in the water receiving cup 14. Therefore, it is possible to prevent the water accumulated in the water receiving cup 14 from swelling and to prevent the water from spilling around.

[0024]

As is clear from the above embodiments, the hand drying apparatus of the present invention has a blow-out air blower by integrally forming a cylindrical portion having the same inner diameter below a drain hole provided in a water receiving tray. It is possible to provide a hand drying device which has an effect of suppressing noise which is likely to be generated when wind blown from the nozzle passes through the drain hole and enters.

Further, a lid is provided to cover the upper surface of the water receiving cup, and an inflow hole opened in the lid is provided immediately below the drain hole of the water receiving tray, so that the wind that has penetrated through the drain hole is provided. However, since it is possible to prevent the water accumulated in the water receiving cup from being directly sprayed on the surface of the water, it is possible to provide a hand drying device which is effective in preventing water from spilling out of the water receiving cup.

[Brief description of the drawings]

FIG. 1A is a side sectional view showing a hand drying apparatus according to Embodiments 1 and 2 of the present invention. FIG. 1B is an external perspective view of the water receiving cup and lid.

FIG. 2 is an external perspective view of the same.

FIG. 3 is a detailed view of part A of FIG.

FIG. 4 is a characteristic diagram showing a relationship between a drain hole diameter and noise in the first embodiment.

FIG. 5 is a characteristic diagram showing a relationship between the cylinder length ratio and noise.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2a Drying space 3 Water receiving tray 4 Blowing means 5 Heat generating means 6 Blowing blowout nozzle 12 Drain hole 13 Cylindrical part 14 Water receiving cup 20 Lid 21 Inflow hole

Claims (2)

[Claims] An air blowing means and a heat generating means housed in the main body, an air blowing nozzle provided at a lower portion of the main body, a water receiving tray provided below the air blowing nozzle via a drying space, A hand dryer having a drain hole formed in the drain tray, a water receiving cup detachably provided below the drain hole, and a tubular portion integrally formed below the drain hole. 2. A lid for covering an upper surface of a water receiving cup, and an inflow hole formed in the lid, wherein the inflow hole is provided at a position just below a drain hole of the water receiving tray. Hand drying equipment.