JP2007151858A - Hand drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive hand drying device achieving easy maintenance and cleaning, prevention of clogging, and a considerable reduction of noise caused by jetting. <P>SOLUTION: The hand drying device has a recessed drying chamber 1, a nozzle part 2 for jetting warm air toward the drying chamber 1, and a fan motor 4 for sending air for jetting from the nozzle part 2. A removable silencer 9 is provided in a nozzle jetting hole in order to provide the inexpensive hand drying device achieving easy maintenance and low noise. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hand drying device that dries a wet hand after washing a hand in a washroom or a toilet.

  In the conventional hand dryer, a rectifying grid is provided inside the nozzle, and the wind flowing in the air passage is rectified by the rectifying grid to reduce noise generated from the nozzle outlet.

  Hereinafter, the hand dryer will be described with reference to FIGS. 13 and 14.

A hand-drying device comprising a drying chamber 101 formed in a concave shape, a nozzle unit 102 that ejects warm air toward the drying chamber 101, and a fan motor 103 that sends out air ejected from the nozzle unit 102, The nozzle unit 102 is provided with a rectifying grid 104, and includes a dust collection filter 105 that removes dust having a particle diameter smaller than that of the rectifying grid 104, and a pre-filter 106 that collects dust larger than the dust collection filter 105 ( For example, Patent Document 1).
Japanese Patent Laid-Open No. 2004-254989

  However, in such a conventional hand dryer, the mesh of the rectifying grid is clogged with dust and dust that has entered the air passage after prolonged use, reducing the noise reduction effect and disassembling the main body. Otherwise, there was a problem that the rectifying mesh could not be taken out.

  In addition, in order to eliminate clogging, a filter is required in front of the rectifying grid, which increases the cost.

  The present invention solves such a conventional problem. By providing a detachable silencer at the nozzle outlet, the maintenance can be facilitated, and cleaning is always free of clogging. An object is to obtain a hand-drying apparatus which is large in reduction and inexpensive.

  In order to achieve the above object, the hand drying device of the present invention delivers a drying chamber formed in a concave shape, a nozzle portion for ejecting warm air toward the drying chamber, and air ejected from the nozzle portion. A hand-drying device provided with a fan motor and having a detachable silencer at a nozzle outlet.

  By this means, an easy-to-maintain and inexpensive hand dryer can be obtained.

  Another means is that the silencer has a rectifying structure.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is that a silencer is provided with a mesh-shaped rectifying plate.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is that the silencer is provided with a plurality of protrusions.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is to provide a silencer with a wire.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is that a sound absorbing material is provided on the inner wall surface of the silencer.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is that a silencer is provided with a thin plate.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  Another means is that a silencer is provided with an air passage expansion chamber.

  By this means, a hand dryer capable of reducing jet noise can be obtained.

  In addition, the other means includes a drying chamber formed in a concave shape in the hand dryer, a nozzle portion that ejects warm air toward the drying chamber, and a fan motor that sends out air ejected from the nozzle portion. It is a hand-drying device, provided with a current plate between the fan motor and the nozzle outlet, and can remove the current plate from the front surface of the nozzle part.

  By this means, a hand dryer capable of easy maintenance can be obtained.

  According to the present invention, by providing a detachable silencer at the nozzle outlet, maintenance and cleaning can be facilitated, and a dust collection filter for preventing clogging of the mesh is not required, so that the cost can be reduced. A drying device can be provided.

  Further, by providing a removable silencer having a rectifying structure at the nozzle outlet, the rectifying structure rectifies the jet flow, so that it is possible to provide a hand dryer that can suppress fluid noise generated from the nozzle.

  In addition, by providing a mesh-shaped rectifying plate on the silencer, it is possible to provide a hand-drying device that can improve the rectifying effect by subdividing the flow of the mesh grid and reducing jet noise due to the turbulence of the flow.

  Further, by providing a plurality of protrusions on the silencer, a vertical vortex is generated when the flow passes through the protrusion, and by generating this vertical vortex, a hand dryer capable of reducing jet noise can be provided.

  Moreover, by providing a wire in the silencer, it is possible to provide a hand dryer that can subdivide the flow to enhance the rectification effect and reduce jet noise.

  Further, by providing a sound absorbing material on the inner wall surface of the silencer, it is possible to provide a hand dryer that can absorb the jet noise and reduce the jet noise.

  In addition, by providing a thin plate on the silencer, the flow along the thin plate changes the turbulent flow into laminar flow, and the flow is subdivided, so the rectifying effect is enhanced and the jet noise due to the flow turbulence can be reduced. Can provide.

  Further, by providing the air channel expansion chamber in the silencer, when passing through the expansion chamber, it is possible to provide a hand drying device capable of reducing the jet noise by once expanding and recompressing the flow.

  In addition, the flow straightening plate is provided between the fan motor and the nozzle outlet, and the flow straightening plate can be removed from the front of the nozzle part, so maintenance is easy and easy cleaning. It is possible to provide a hand dryer that can always keep the lattice free of clogging.

  The hand dryer according to claim 1 of the present invention includes a drying chamber formed in a concave shape, a nozzle portion that ejects warm air toward the drying chamber, and a fan motor that sends out air ejected from the nozzle portion. This is a hand dryer equipped with a silencer that can be attached to and detached from the nozzle outlet, is easy to maintain and clean, and does not require a dust collection filter to prevent clogging of the mesh. Has the effect of

  Moreover, the hand dryer according to claim 2 of the present invention has a rectifying structure in the silencer, and reduces the resistance in the flow path by reducing the resistance in the flow path by rectifying the jet flow flowing in the nozzle by the rectifying structure. It has the effect of suppressing jet noise due to flow.

  According to a third aspect of the present invention, there is provided the hand dryer according to the present invention, wherein the silencer is provided with a mesh-shaped rectifying plate, and the flow path is obtained by rectifying the jet flow flowing in the nozzle by the mesh and subdividing the flow. It reduces the internal resistance and suppresses jet noise caused by turbulent flow.

  Further, the hand dryer according to claim 4 of the present invention is provided with a plurality of protrusions on the silencer, and when the flow in the nozzle passes through the protrusions, a vertical vortex is generated and the jet structure is changed. It has the effect of suppressing jet noise caused by turbulent flow.

  In addition, the hand dryer according to claim 5 of the present invention is provided with a wire in the silencer, and when the flow in the nozzle passes through the protrusion, a vertical vortex is generated and the jet structure is changed. It has the effect | action which suppresses the jet noise by.

  According to a sixth aspect of the present invention, there is provided the hand dryer according to the present invention, wherein a sound absorbing material is provided on the inner wall surface of the silencer, and the jet noise is suppressed by absorbing the jet noise generated when passing through the nozzle. Has an effect.

  The hand dryer according to claim 7 of the present invention is a silencer provided with a thin plate, and has a function of subdividing the jet flowing in the nozzle, creating a smooth flow, and suppressing jet noise.

  In the hand dryer according to claim 8 of the present invention, the silencer is provided with an air passage expansion chamber, and a part of the air passage becomes a muffler muffler mechanism and has an action of suppressing jet noise.

  According to a ninth aspect of the present invention, there is provided a hand-drying device according to a ninth aspect of the present invention, comprising a drying chamber formed in a concave shape, a nozzle portion for ejecting warm air toward the drying chamber, and a fan for sending air ejected from the nozzle portion. A hand dryer equipped with a motor, comprising a current plate between the fan motor and the nozzle outlet, and capable of removing the current plate from the front surface of the nozzle part, so that the current plate can be easily maintained. Has an effect.

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

(Embodiment 1)
The external shape of the hand dryer according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 1, the hand dryer according to the first embodiment has a drying chamber 1 formed in the lower part of the apparatus body. The drying chamber 1 forms a concave space so that a wet hand can be inserted. A nozzle part 2 is provided above the drying chamber 1. The apparatus main body is covered with a main body case 3, and a fan motor 4 is installed inside. Air sucked from the suction port 5 is blown by the fan motor 4 and blown out from the nozzle portion 2 toward the drying chamber 1. The nozzle part 2 is provided with a silencer 9 that is attached and detached and has a rectifying structure. The high-speed jet blown out from the nozzle unit 2 blows off water droplets attached to the hand and is collected in the drain cup 8 from the drain port 7 at the bottom 6 of the drying chamber 1.

  Next, the nozzle part 2 is demonstrated using FIGS.

  The nozzle part 2 is comprised by the nozzle blower outlet 10 and the silencer 9, as shown in FIGS. 2-4, and the silencer 9 becomes a structure which can be attached or detached from a main body. As shown in FIG. 4, the silencer 9 is fixed to the nozzle outlet 10 by a fixing screw 11 that can be removed. By removing the fixing screw 11, only the silencer 9 can be easily detached and maintenance can be performed.

  As shown in FIG. 5, a heater 12 is provided inside the nozzle portion 2 so that warm air can be blown out. Further, the silencer 9 has a rectifying structure 13 that rectifies the blown air blown from the fan motor 4, and can reduce or suppress noise caused by a jet flow from the blowout nozzle.

  Next, the internal structure of the silencer 9 will be described with reference to FIGS.

  FIG. 6 shows a structure in which the rectifying grid of the mesh 14 is used for the rectifying structure of the silencer 9. By placing the removable mesh 14 inside the silencer 9, the jet flow from the nozzle outlet 10 can be subdivided and the turbulent flow structure can be changed, so that the noise of the jet flow can be reduced or suppressed. The finer the mesh diameter, the better the rectification effect and noise reduction effect.

  FIG. 7 shows a projection 15 provided at the outlet of the silencer 9. By providing a plurality of protrusions 15 on the inner side surface of the blower outlet of the silencer 9, and generating a vertical vortex in the jet flow from the nozzle outlet, the jet structure can be changed. Thereby, the noise of the jet can be reduced / suppressed. As for the shape of the protrusion 15, the triangular pyramid has the greatest noise reduction effect, but other shapes may be used.

  Moreover, the installation interval of the protrusions 15 can be freely changed.

  FIG. 8 shows a wire 16 provided at the outlet of the silencer 9. A wire 16 is stretched in the longitudinal direction at the outlet of the silencer 9. By generating a vertical vortex in the jet, the jet structure can be changed. Thereby, the noise of the jet can be reduced / suppressed. A plurality of wires 16 may be provided not only in the longitudinal direction but also in the lateral direction.

  Further, it may be stretched like a lattice so as to go straight at the center of the outlet.

  FIG. 9 is a view in which a thin plate 17 is provided at the outlet of the silencer 9. A thin plate 17 is stretched in the longitudinal direction at the outlet of the silencer 9. Since the jet is subdivided and the turbulent structure is changed, the noise of the jet can be reduced and suppressed. A plurality of thin plates 17 may be provided not only in the longitudinal direction but also in the lateral direction.

  Moreover, you may install in a grid | lattice form so that it may go straight at the blower outlet center.

  FIG. 10 is a view in which a sound absorbing material 18 is provided inside the air outlet of the silencer 9. By providing the sound absorbing material 18 having an air layer such as urethane inside the silencer 9, it is possible to absorb the jet noise from the nozzle outlet 10 and reduce or suppress the noise.

  FIG. 11 is a view in which an air passage expansion chamber 19 is provided inside the silencer 9. By providing the air passage expansion chamber 19 in the nozzle air passage, the air in the nozzle air passage expands once. Then, it contracts to become a muffler structure, and the noise in the air passage can be silenced.

(Embodiment 2)
The second embodiment of the present invention will be described below with reference to the drawings.

  FIG. 12 is a rectifying plate removal mechanism diagram of the nozzle portion. The nozzle front surface 20 of the nozzle outlet is a panel of the hinge mechanism 21, and the nozzle front surface 20 portion can be opened and closed, and the rectifying plate 22 can be taken in and out. Since maintenance can be easily performed, clogging of the rectifying plate 22 can be prevented, and as a result, the noise reduction effect can always be maintained.

  The hand dryer of the present invention is installed in a washroom or a toilet such as a restaurant or a hotel, and is also useful in a hospital operating room or kitchen.

Configuration diagram of the hand-drying apparatus of Embodiment 1 of the present invention Front view of the same dryer Front view of the same dryer Perspective view from below of the nozzle part Cross section of the nozzle Silencer configuration diagram Configuration diagram of the silencer Configuration diagram of the silencer Configuration diagram of the silencer Configuration diagram of the silencer Configuration diagram of the same silencer Sectional drawing of the nozzle part of the second embodiment Perspective view of a conventional hand dryer Main configuration of the hand dryer

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying chamber 2 Nozzle part 4 Fan motor 9 Silencer 13 Rectification structure 14 Mesh 15 Protrusion 16 Wire 17 Thin plate 18 Sound absorbing material 19 Air channel expansion chamber 22 Rectification plate

Claims (9)

A nozzle drying nozzle comprising: a drying chamber formed in a concave shape; a nozzle portion that ejects warm air toward the drying chamber; and a fan motor that sends out air ejected from the nozzle portion. A hand dryer equipped with a removable silencer. The hand dryer according to claim 1, wherein the silencer has a rectifying structure. The hand dryer according to claim 1 or 2, wherein the silencer is provided with a mesh-shaped current plate. The hand dryer according to claim 1, wherein the silencer is provided with a plurality of protrusions. The hand dryer according to claim 1 or 2, wherein the silencer is provided with a wire. The hand dryer according to claim 1 or 2, wherein a sound absorbing material is provided on the inner wall surface of the silencer. The hand dryer according to claim 1, wherein the silencer is provided with a thin plate. The hand dryer according to claim 1 or 2, wherein the silencer is provided with an air passage expansion chamber. A hand-drying apparatus comprising a drying chamber formed in a concave shape, a nozzle portion that ejects warm air toward the drying chamber, and a fan motor that sends out air ejected from the nozzle portion, the fan motor and the nozzle A hand dryer, comprising a current plate between the nozzles, wherein the current plate can be removed from the front surface of the nozzle portion.

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