JP2005160872A - Hand drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand drier which has improved drying efficiency and reduced noise, provides a well sense of use, and sanitarily dries wet hands after being washed. <P>SOLUTION: The hand drier is provided with a processing space 3 in and out of which the hands are put, a high pressure air flow generator 8 for blowing off a working air flow 15, and a jetting nozzle 12 with a plurality of slit-shaped jetting holes 13 oriented in the width direction of the processing space 3 for blowing off the working air flow 15 from the high pressure air flow generator 8 to the processing space 3. In this case, the plurality of jetting holes 13 can be provided in the front and back directions of the processing space 3 as well. Also, the jetting holes 13 can be provided zigzag in the front, back and width directions of the processing space 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hand drying apparatus that can hygienically dry wet hands after washing.

There is a hand-drying device that blows off water droplets adhering to wet hands after washing by high-speed airflow to dry them. The box is provided with a concave manual insertion portion as a processing space, and an upper part thereof is provided with blow nozzles formed in a row of slit-like blow holes which are long in the width direction of the box. The connected air duct is connected, and a high-speed air flow is ejected from the upper part of the hand insertion part into the hand insertion part.
When a hand is inserted into the hand insertion part of the hand dryer, the water droplets adhering to the hand are blown away by the high-speed air flow blown from the blow-out nozzle, and prepared from the drain port provided at the bottom of the hand insertion part below the hand insertion part. Dropped into the drainage container and received. Thus, the hand drying process is performed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-178742 (pages 1 and 2, FIG. 1)

  According to the conventional hand drying apparatus configured as described above, the wet hand is quickly dried by the kinetic energy of the high-speed airflow, but the entire hand in which the airflow blown from the blowout hole of the blowout nozzle is inserted into the hand insertion portion The drying efficiency was not good. Here, if the width of the blowout hole is increased, the drying range of the hand can be increased, but the speed of the airflow is decreased. On the other hand, if the width of the blowout hole is narrowed to increase the flow velocity and the force to blow off water droplets on the hand surface is increased, the noise will increase.

  The present invention has been made in order to solve the above-mentioned problems. It is possible to improve the drying efficiency without reducing the wind speed of the high-speed airflow blown from the blowout hole, to reduce noise, and to have a good usability. An object is to provide a drying apparatus.

  The hand drying device according to the present invention comprises a processing space for putting in and out the hand, a high-pressure air flow generating device for blowing out a working air current, and a plurality of slit-like blowing holes oriented in the width direction of the processing space, and the high-pressure air And a blowout nozzle for blowing a working airflow from the flow generator into the processing space.

  Improve drying efficiency, reduce noise, improve usability, and dry wet hands after cleaning.

[Embodiment 1]
FIG. 1 is a longitudinal sectional view of a hand dryer according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of a blowout hole of FIG. As shown in the figure, a box 1 that forms an outer shell has a hand insertion port 2 on the front surface and a hand insertion part 3 as a processing space following the hand insertion port 2 so that a hand can be inserted and removed. is there. The manual insertion part 3 is formed in the lower front part of the box 1 as an open sink-like concave part whose front and both sides are open, and has a curved surface at the edge part of the water receiving part 4 and the back side forming the lower part. The barrier structure 5 by the rising of the structure is provided so that water does not scatter to the side or the front. The bottom of the water receiving portion 4 is inclined downward toward the front, and a drain port 6 is provided at the lower end of the inclination.

  A drain container 7 for storing water dripping from the drain port 6 is provided below the water receiving portion 4 so as to be freely inserted and removed. In addition, the inner surface of the hand insertion portion 3 is impregnated with a water-repellent coating such as silicon or fluorine, a hydrophilic coating such as titanium oxide, or an antibacterial agent to reduce the adhesion of dirt on the inner surface. It is designed to reduce the growth of bacteria.

  A high pressure air flow generator 8 is incorporated in the box 1 and is rotated by a DC brushless motor (which may be a normal commutator motor or an induction motor), a drive circuit for driving the DC brushless motor, and a DC brushless motor. The turbo fan is attached to the box 1 directly above the hand insertion portion 3. The intake side of the high-pressure airflow generator 8 faces the intake passage 10 that is open at the lower end provided in the vertical direction on the back side of the box 1 and in the vicinity of the back side of the hand insertion portion 3, Air can be sucked from the lower end of the intake passage 10 through a removable air filter 11.

  A plurality of air outlets of the high-pressure airflow generator 8 are opened in the radial direction at intervals in the circumferential direction on the outer periphery of the circular cup-shaped fan casing. The outside of the fan casing is covered with a circular cup-shaped casing 9 provided with a guide path in a direction along the rotation direction of the turbofan, and is sent from the high-pressure airflow generator 8 to the end of the guide path of the casing 9. A blow-off nozzle 12 that converts the coming high-pressure air into a high-speed air flow and blows it out to the manual insertion portion 3 is connected.

The blowout nozzle 12 is attached to the upper part of the hand insertion portion 3 in the vicinity of the hand insertion opening with the jet port facing downward, and is attached to the hand inserted into the hand insertion portion 3 from the blowout hole 13 formed in the blowout nozzle 12. A high-speed air stream that blows away the moisture is sprayed, and water droplets are peeled off from the surface of the hand and blown away without rubbing hands.
Note that a hand detection sensor 14 that faces the hand insertion portion 3 and detects insertion / removal of the hand is provided behind the blowout nozzle 12.

  The blowout holes 13 formed in the blowout nozzle 12 are oriented in the width direction of the box 1 (the front-rear direction of the paper surface of FIG. 1 or the left-right direction of the paper surface of FIG. 2) and formed in a slit shape, for example, having a rectangular shape, A plurality of rows are provided in the front-rear direction of the box 1 (the left-right direction of the paper surface of FIG. 1 or the vertical direction of the paper surface of FIG. 2), and two rows are provided in the first embodiment, and the first and second blowout holes 13a, 13b is configured.

  The operation of the first embodiment configured as described above will be described. When the hand is inserted from the hand insertion port 2 into the hand insertion part 3 to the vicinity of the wrist, the hand detection sensor 14 detects the insertion of the hand, and the high pressure air flow generator 8 is activated by the processing of the control circuit. A high-speed air flow having high kinetic energy is blown into the hand insertion portion 3. At this time, as shown in FIG. 3, the high-speed air currents blown from the individual blowout holes, that is, the first and second blowout holes 13a and 13b, that is, the first and second airflows 15a and 15b are the ambient air. The airflow width is widened while the airflow is involved, and the airflows eventually merge to form a wide integrated high-speed airflow 15c.

  In this way, a wide range of high-speed airflow 15c hits the inserted hand, and the water adhering to the hand is blown off to the water receiving part 4 of the hand inserting part 3. Furthermore, by inserting and removing the hand in the hand insertion portion 3, all water droplets adhering to the entire hand are eliminated, and the hand is dried. When the hand is removed from the hand insertion portion 3 after the hand drying process is completed, the hand detection sensor 14 detects this, and the high-pressure airflow generator 8 stops. The water droplets blown from the hand flow down toward the drain port 6 in the water receiving portion 4 having a forward tilt structure, and are stored in the drain container 7 from the drain port 6.

Thus, the hand drying range is widened by the wide integrated high-speed air flow 15c, and the high-speed air flow can be applied to the entire hand, so that the drying efficiency is improved. Moreover, since it is not necessary to increase the flow rate more than necessary, generated noise can be suppressed.
On the other hand, when there are only one row of blow holes in the front-rear direction as in the past, widening the width of the blow holes can widen the hand drying range, but the air flow rate becomes slow and the drying performance decreases. To do. Also, if the width of the blowout hole is narrowed to increase the flow velocity and the water droplet blowing force on the hand surface is increased, the drying efficiency can be improved, but the airflow collision that occurs when the blown airflow noise and airflow collide with the hand. Noise increases. Since these airflow noise and airflow collision noise are proportional to the sixth power of the flow velocity, the noise increases significantly by a slight increase in the flow velocity.

[Embodiment 2]
FIG. 4 is a plan view of the blowout hole of the hand dryer according to Embodiment 2 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In the second embodiment, the blow holes 13 of the hand dryer are arranged in a staggered manner. That is, three slit-shaped blow holes 13 that are oriented in the width direction of the box 1 and have, for example, a rectangular shape are provided. The first blow holes 13 a are arranged in the front first row in the front-rear direction of the box 1. And two second and third outlet holes 13b and 13c are provided at the same position in the front-rear direction of the rear second row. In this case, the first blowout located between the end of the third blowout hole 13c located in the second row and the end of the first blowout hole 13a located in the first row and in the first row. The ends of the holes 13a and the ends of the second blowing holes 13b located in the second row are separated from each other by substantially the same distance in the width direction.
Other operations and effects in the second embodiment are substantially the same as those shown in the first embodiment, and thus the description thereof is omitted.

[Embodiment 3]
FIG. 5 is a plan view of the blowout hole of the hand dryer according to Embodiment 3 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In Embodiment 3, the blow holes 13 of the hand dryer are arranged in a staggered manner. That is, three slit-shaped blow holes 13 that are oriented in the width direction of the box 1 and have a rectangular shape are provided. The first blow holes 13a are formed in the front first row of the box 1 in the front-rear direction. One is provided, and two second and third blow-out holes 13b and 13c are provided at the same position in the front-rear direction of the rear second row. In this case, the third blow hole 13c located in the second row, the vicinity of the end of the first blow hole 13a located in the first row, and the first blow hole 13a located in the first row The second blow holes 13b located in the second row are arranged so that the vicinity of the end portions of the second blow holes 13b overlap in the width direction by substantially the same length.

According to the third embodiment configured as described above, the airflow distribution corresponding to the portion where the blowout holes 13 overlap forms a locally thick airflow width 15c as shown in FIG. The locally thick portion has a stronger force to blow off the water droplets than the other portions. For example, when it is selectively applied to a fingertip where water droplets are likely to remain, the feeling of use is improved and the drying efficiency is improved.
The other operations and effects in the third embodiment are substantially the same as those shown in the first embodiment, and thus description thereof is omitted.

It is a longitudinal cross-sectional view of the hand dryer which concerns on Embodiment 1 of this invention. It is a top view of the blowing hole of FIG. FIG. 2 is an operation explanatory diagram of FIG. 1. It is a top view of the blowing hole of the hand dryer which concerns on Embodiment 2 of this invention. It is a top view of the blowing hole of the hand dryer which concerns on Embodiment 3 of this invention. FIG. 6 is an operation explanatory diagram of FIG. 5.

Explanation of symbols

3 manual insertion part (processing space), 8 high-pressure airflow generator, 12 blowing nozzle, 13, 13a-13c blowing hole, 15a-15c airflow.

Claims (4)

  A processing space for taking in and out the hand, a high-pressure airflow generator for blowing out the working airflow, and a plurality of slit-shaped blowing holes oriented in the width direction of the processing space, and the working airflow from the high-pressure airflow generating device A hand-drying device comprising a blow-off nozzle that blows into the processing space.   The hand dryer according to claim 1, wherein a plurality of the blowout holes are provided in the front-rear direction of the processing space.   The hand-drying apparatus according to claim 1, wherein the blow-out holes are provided in a staggered manner in the front-rear and width directions of the processing space. The hand dryer according to claim 2 or 3, wherein the blowout holes overlap in the width direction of the processing space.

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