JP5305238B2 - Hand dryer - Google Patents

Description

  The present invention relates to a hand drying device that blows air on a user's hand inserted in a hand drying chamber to dry the hand.

  As a hand-drying device that blows air onto a user's hand inserted in a hand-drying chamber and dries it, a device that discharges water droplets blown from the hand to a water receiving tray below the hand-drying chamber is known (the following patent) Reference 1).

  In the hand drying device proposed in the following Patent Document 1 (see FIG. 8), the hand drying chamber 2 that can be inserted and removed from the front of the box and the hand inserted in the hand drying chamber 2 are high-speed. A slight gap for water introduction between a high-pressure airflow generator (not shown) that ejects an airflow and a back plate 1b that forms a back surface of the hand drying chamber 2 that receives water droplets of the hand blown off by the high-speed airflow A water receiving plate 5 disposed on the bottom surface of the hand drying chamber 2 provided with 14 and water for storing water drops on the wall surface of the hand drying chamber 2 and the water receiving plate 5 below the water receiving plate 5. The receiving tray 4 and a bent portion that forms an extending portion 8 extending from the back plate 1b of the hand drying chamber 2 toward the inside of the water receiving tray 4 and bends the tip of the extending portion 8 downward. 8d is formed, and the bent portion 8d is in a position for guiding the water droplets to the inside of the water receiving tray 4. It is arranged. With such a configuration, the conventional hand drying apparatus guides the water droplets of the hand blown off by the high-speed airflow to the water receiving tray 4 through the extension portion 8.

JP 2005-185646 A

  In the conventional technique described above, the extension portion 8 directly below the slight gap 14 is used to suppress wind noise generated when high-speed airflow passes through the gap 14 between the water receiving plate 5 and the back plate 1b. There was almost no high-speed airflow in the direction. Therefore, with respect to the water introduction to the water receiving tray 4 of the water droplets that have fallen to the extension portion 8 from the slight gap 14, only the weight of the water droplets or the extension portion 8 is inclined downward on the front side. It was draining. However, the water droplets sometimes stay on the surface of the extension portion 8 due to the surface tension only by the weight and inclination of the water droplets. As a result, there is a problem that the organic matter contained in the water droplets may accumulate and rot and generate an unpleasant odor. Further, since the gap 14 is opened in the horizontal direction, the sound generated when the high-speed air flow along the back plate 1b enters the gap 14 is transmitted to the user directly, which is annoying.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hand-drying device that can improve drainage and can be kept clean and has a low sound.

  In order to achieve the above object, a hand drying apparatus according to the present invention includes a hand drying chamber in which a hand opened in the front of a box body can be taken in and out, and a high pressure that ejects a high-speed air current to the hand inserted in the hand drying chamber. Arranged on the bottom surface of the hand drying chamber provided with a gap for water introduction between the air flow generator and the back plate constituting the back surface of the hand drying chamber that receives water droplets of the hand blown off by the high-speed air flow A water receiving plate, a water receiving tray provided below the water receiving plate for storing water droplets on the water receiving plate, and an extension extending from the back plate of the hand drying chamber in the front direction of the water receiving tray A rear drying upper end of the extending portion is disposed above a lower end of the rear surface of the water receiving plate, and an upper upper end of the extending portion is disposed on the rear side of the water receiving plate. Inclined to be positioned below the lower end

  According to this aspect, as in the case of the hand dryer as in the prior art document 1, instead of draining the water droplets retained in the extending portion to the water receiving tray over time due to only its own weight or inclination, By reliably blowing a high-speed airflow whose direction has been changed by the inserted hand to the extension part, water can be quickly drained without stagnation of water droplets on the extension part, and the extension part can be cleaned. Can be kept in.

  Furthermore, the high-speed air flow in the vertical direction along the back plate collides with the extension by the hand inserted into the hand drying chamber and the flow velocity is weakened. Therefore, the front upper end of the extension and the rear lower end of the water receiving plate Since the flow rate of air entering the water receiving tray through the gap between the two and the gap is slow, and the gap is opened backward, it is possible to reduce the propagation of sound generated when air passes through the gap to the user. .

  In the hand drying apparatus according to claim 2 of the present application, the inclined arrangement of the extending portion is provided over the entire width direction of the hand drying chamber.

  According to this aspect, since water droplets on the surface of the extending portion can be quickly drained to the water receiving tray over the entire width direction on the back side of the hand drying chamber, the drainage is further improved and the extension The exit can be kept clean.

  In the hand dryer according to claim 3 of the present application, the upper end on the back side of the extending portion is disposed above the upper end on the back side of the water receiving plate.

  When a hand is pulled out from the hand drying chamber after using the hand drying device, in the hand drying device as described in the prior art document 1, a high-speed air current is blown on the water receiving plate for several seconds and along the water receiving plate. However, in the hand dryer according to the present invention, the rear side upper end of the extension portion is the rear side upper end of the water receiving plate. Since the high-speed air stream is inclined upwards, the high-speed airflow smoothly changes to the back plate along the water receiving plate toward the back plate by the extending portion so that the collision sound Can be reduced.

  Moreover, in the hand dryer according to claim 4 of the present application, the back side of the water receiving plate is bent downward, and the lower end of the bent portion is subjected to hemming processing that is folded back to the front side. It is characterized by.

  Therefore, the bent portion can reduce the flow of air from the extending portion to the upper surface of the water receiving plate, can prevent the water drainage of water droplets on the upper surface of the water receiving plate from deteriorating, and the folded hemming When the upper surface of the extending portion is cleaned by processing, it is possible to eliminate damage even if a sponge or the like comes into contact with the lower end of the bent portion.

  According to the present invention, it is possible to blow away the water droplets retained by the surface tension on the extension part toward the water receiving tray with a high-speed air flow, and to keep the extension part clean. Further, it is possible to suppress the passing sound that is generated when the high-speed airflow flows into the water receiving tray through the gap.

It is an external view which shows the hand-drying apparatus of this invention. It is sectional drawing which shows the structure of the hand dryer of this invention. It is detail drawing which shows the water receiving part of the hand dryer of this invention. It is detail drawing which shows the flow of the air of the hand dryer of this invention. It is detail drawing which shows the flow of the air after hand-drying apparatus use in another embodiment of this invention. It is detail drawing which shows the extension part and water receptacle of the hand dryer of this invention. It is detail drawing which shows the water receiving part in another embodiment of this invention. It is detail drawing which shows the water receiving part of the hand dryer of a prior art.

  As shown in FIG. 1, the hand drying device A of the present invention is installed on a wall surface W such as a toilet washroom space of a building, and the hand drying device A is installed separately from the floor surface F. In FIG. 1, a broken line portion of the hand dryer A indicates a portion buried in the wall surface W. The main body box 1 constitutes the outline of the hand dryer A, and is a box made of stainless steel subjected to hairline processing, opened to the front of the hand dryer A, and having the remaining five walls. The upper half of the hand dryer A has a front cover 6 on the front side and a water receiving tray 4 on the lower end side of the hand dryer A. Between the front cover 6 and the water receiving tray 4, a hand drying chamber which is a space surrounded on three sides by a facing side plate 1 a that forms a part of the main body box 1 and a back plate 1 b that forms a back surface behind the side plate 1 a. 2 A water receiving plate 5 is provided at the bottom of the hand drying chamber 2. The water receiving tray 4 has a water level confirmation window 3 so that the water accumulated in the water receiving tray 4 and its water surface can be visually recognized.

As shown in FIG. 2, a functional part B is provided between the front cover 6 and the main body box 1. The function part B has a suction port 11, a filter 12, a fan motor 16, a heater 18, and a nozzle 9 in communication. When the fan motor 16 is activated, the air sucked from the suction port 11 passes through the filter 12 and is sucked into the fan motor 16 from the fan motor suction port 16a, and the pressurized air inside the fan motor 16 is The fan motor exhaust port 16 b is heated through the heater 18 to reach the nozzle 9, and high-speed air is blown from the nozzle 9 to the hand drying chamber 2.
In order to prevent the water droplets scattered on the back plate 1b from being sucked into the suction port 11, a rectifying plate 11a is provided substantially perpendicular to the back plate 1b so as to suck only air from the horizontal direction. . Further, the filter 12 can be removed by pulling a filter handle 12a provided at the upper rear of the hand drying chamber 2, and the filter 12 can be easily cleaned. Moreover, the nozzle 9 is arrange | positioned at the upper front side of the hand-drying chamber 2, and the jet angle of high pressure air inclines slightly backward from substantially vertical. Thereby, there exists an effect which suppresses water droplet scattering to a user side.

  Further, the functional unit B includes the sensor 10 and the control unit 17. When the sensor 10 detects the user's hand inserted into the hand drying chamber 2, the control unit 17 that has received the detection result of the sensor 10 drives the fan motor 16, and the sensor 10 no longer detects the user's hand. The control unit 17 that has received the non-detection result of the sensor 10 stops the fan motor 16. The controller 17 drives and stops the heater 18 in synchronization with the fan motor 16.

  In FIG. 2, the water receiving portion C is welded to the water receiving plate 5 TIG welded to the side plate 1a, the extended portion 8 welded to the back plate 1b, the extended portion 8 and the side plate 1a. The water receiving trough 23, the removable water receiving tray 4 and the stopper 20 are provided. The water droplets adhering to the water receiving plate 5 are stored in the water receiving tray 4 through the extending portion 8 or the water receiving rod 23 welded to the extending portion 8. The water receiving tray 4 is locked to the stopper 20 and can be lifted and pulled out to the front side, and the water in the water receiving tray 4 can be discarded.

  As shown in FIG. 3, the water receiving plate 5 is disposed so that the upper surface of the water receiving plate 5 is inclined downward from the front side to the back side, and the end portion on the back side is between the back plate 1 b and the back plate 1 b. The upper portion 5b has a bent portion 5d that is bent vertically downward from the upper end 5b toward the lower end 5a. The extending portion 8 is located across the horizontal gap 14a between the end portion of the water receiving plate 5 on the back plate 1b side and the back plate 1b, and the upper surface of the extending portion 8 is inclined downward from the back side to the front side. The front end is a bent portion 8d that is bent in a substantially vertical direction from the upper end 8c toward the lower end 8a. The upper end 8b welded to the back plate 1b is above the lower end 5a on the back side of the water receiving plate 5, and the upper end 8c on the front side of the extending portion 8 is the water receiving plate. 5 has a vertical gap 14b between the upper end 8c and the lower end 5a of the rear plate 1b side end of the water receiving plate 5 by being inclined so as to be lower than the lower end 5a on the rear side of Yes.

  In such a configuration, the flow of wind and water when the hand dryer A is operated will be described. As shown in FIGS. 3 and 4, the water receiving plate 5 descends with a gentle inclination of 3 ° from the front side to the back side of the hand drying chamber 2. The distance between the water receiving plate 5 and the back plate 1b on the back side of the hand drying chamber 2 is about 20 mm. If the distance is too far away, water splashing on the extension 8 may occur and water drops may be applied to the user, and the wind noise tends to increase due to the position of the gap 14b approaching the front side. The distance is preferably in the range of about 1/4 or less of the depth of the hand drying chamber 2. The rear end of the water receiving plate 5 is bent downward to form a bent portion 5d that is about 6 mm long, and a radius of about 2 mm is applied from the upper end 5b to the bent portion 5d. Thus, hemming is performed by folding back to the front side of the lower end 5a of the bent portion 5d. On the back side of the lower end 5a, the extending portion 8 from the back plate 1b has an inclination of about 30 ° from the substantially horizontal direction, and the upper end 8b of the extending portion 8 is disposed above the lower end 5a of the water receiving plate 5, In addition, the upper end 8 c on the front side of the extending portion 8 is disposed below the lower end 5 a of the water receiving plate 5.

As for the wind flow, when the operation is started, a high-speed air flow is ejected from the nozzle 9, and the wind flow D is directed toward the back plate 1 b on the back side of the hand drying chamber 2 by the hand inserted into the hand drying chamber 2. And descend along the back plate 1b.
In the conventional hand dryer, the gap between the water receiving plate 5 and the back plate 1b is made small in order to reduce wind noise, making it difficult for high-speed air current to enter. By changing the direction of the gap from the substantially horizontal direction of the conventional structure to the substantially vertical direction and opening the gap 14b of about 5 mm, the high-speed air current first collides with the extension 8 and the flow velocity becomes weaker, and then the extension Since the flow rate of the air entering the water receiving tray 4 from the gap 14b between the front side upper end 8c of the portion 8 and the rear side lower end 5a of the water receiving plate 5 is slow, and the gap 14b opens rearward, the gap By suppressing the propagation of the sound generated when air passes through 14b to the user, the wind noise generated from the gap 14b is reduced. Furthermore, since hemming is performed on the lower end 5a of the rear side end portion of the water receiving plate 5, the rigidity of the water receiving plate 5 is improved, and vibration sound of the water receiving plate 5 due to wind can be suppressed. Moreover, since the extended part 8 is exposed, it is easy to clean the upper surface. However, when the upper surface of the extended part 8 is cleaned by hemming the lower end 5a of the rear side end of the water receiving plate 5. Even if the sponge or the like contacts the lower end of the bent portion of the water receiving plate 5, it can be prevented from being damaged.

  Next, based on FIG. 5, the flow of air after using the hand dryer in another embodiment of the present invention will be described. As shown in FIG. 5, in the second embodiment, the point that the rear-side upper end 8 b of the extending portion 8 is disposed above the rear-side upper end 5 b of the water receiving plate 5 is the same as the first embodiment described above. Is different. Therefore, the hand drying device A has a structure in which a high-speed air current is blown for several seconds after the hand is pulled out from the hand drying chamber 2 after use. A collision sound was generated along the plate 5 toward the back plate 1b on the back side in a substantially horizontal direction and with the back plate 1b on the back side. However, in the hand drying device A according to the present invention, the upper end 8b of the base of the back side of the extending portion 8 is inclined above the upper end 5b of the back side of the water receiving plate 5 so that the wind flow D of the high-speed airflow Can be smoothly changed to the upper side of the back plate 1b along the water receiving plate 5 toward the back plate 1b, and the impact sound on the wall surface 1a can be reduced.

  Here, the flow of water scattered from the hand in the two embodiments described above will be described. The water droplets E scattered from the hand adhere to the side plate 1a, the back plate 1b, the water receiving plate 5 or the extending portion 8. The water droplets adhering to the extending portion 8 are quickly drained to the water receiving tray 4 by the wind flow D without causing the water droplets to stay on the extending portion 8 (see FIG. 4). After the operation is stopped, the water droplets adhering to the side plate 1a and the back plate 1b flow to the water receiving plate 5 or the extending portion 8 by their own weight. Moreover, the water droplets adhering to the water receiving plate 5 are blown off to the extending portion 8 by a high-speed air current blown for several seconds after the use of the hand dryer A (see FIG. 5). Moreover, since the extension part 8 is provided over the whole area of the width direction of the said manual-drying chamber, drainage can be improved further.

  Next, details of the extending portion 8 and the water receiving basin 23 will be described with reference to FIG. 6A is a perspective view of the extending portion 8 and the water receiving basin 23 as viewed obliquely from above, FIG. 6B is a side view thereof, and FIG. 6C is a perspective view of the bottom surface. . As shown in FIG. 6, water receptacles 23 are welded to the left and right of the extension 8. In order to incline the front side of the water catcher 23 upward by 3 ° with respect to the substantially horizontal direction, the welded part 23a is welded in a state where the extension part 8 and the water catcher 23 are abutted vertically, and the assembly By tilting itself and welding to the side plate 1a and the back plate 1b, the plate is inclined upward by 3 ° with respect to the substantially horizontal direction. In this way, the dimension control of the assembly can be easily performed by the welding method in which the welded portion 23a is vertically abutted. In addition, by raising the side 23b where the water receiving bowl 23 and the side plate 1a are in contact with each other and inclining it toward the water receiving tray 4, when water drops flow from the extending portion 8 to the water receiving bowl 23, The retention of water droplets on the receiving bowl 23 can be reduced. Furthermore, by forming the diagonally shaped portion 23c with the left and right corners cut away on the back side of the extended portion 8, the outer periphery becomes one continuous side and the entire circumference welding with the side plate 1a and the back plate 1b is facilitated.

  Next, based on FIG. 7, the water receiving part in further another embodiment of this invention is demonstrated. As shown in FIG. 7, the third embodiment is different from the first embodiment described above in that a bent portion is not formed on the back side of the water receiving plate 5. That is, in the third embodiment, the upper end and the lower end on the back side of the water receiving plate 5 are different only by the thickness of the water receiving plate 5 and are substantially at the same height. Even in this case, the rear-side upper end 8b of the extending portion 8 is positioned slightly above the rear-side lower end 5a of the water receiving plate 5 and the front-side upper end 8c of the extending portion 8 is the water receiving plate 5. Since the horizontal gap 14a and the vertical gap 14b are formed, the same effect as the first and second embodiments described above is achieved. is there.

A ... Hand dryer B ... Functional part C ... Water receiving part D ... Wind flow E ... Water droplet 1 ... Main body box 1a ... Side plate 1b ... Back plate 2 ... Hand drying chamber 3 ... Water level confirmation window 4 ... Water receiving tray DESCRIPTION OF SYMBOLS 5 ... Water receiving plate 5a ... Lower end 5b ... Upper end 5d ... Bending part 6 ... Surface cover 8 ... Extension part 8a ... Lower end 8b ... Upper end 8c ... Upper end 8d ... Bending part 9 ... Nozzle 10 ... Sensor 11 ... Suction port 11a ... Rectifying plate 12 ... Filter 12a ... Filter handles 14a, 14b ... Gap 15 ... Intake passage 16 ... Fan motor 17 ... Control section 18 ... Exhaust passage 20 ... Stopper

Claims (4)

  A hand drying chamber that can be put in and out of the front of the box body, a high-pressure air flow generator that ejects a high-speed air current to the hand inserted in the hand drying chamber, and water droplets of the hand blown off by the high-speed air current are received A water receiving plate disposed on the bottom surface of the hand drying chamber provided with a gap for water introduction between the back plate constituting the back surface of the hand drying chamber, and provided below the water receiving plate. In the hand dryer comprising: a water receiving tray for storing water droplets on the water receiving plate; and an extending portion extending from the back plate of the hand drying chamber in the front direction of the water receiving tray, the back surface of the extending portion A side upper end is arranged above the lower end on the back side of the water receiving plate, and an upper end on the front side of the extending portion is inclined so as to be positioned below the lower end on the back side of the water receiving plate. Hand drying equipment.   The hand drying apparatus according to claim 1, wherein the extending portion is provided over the entire width direction of the hand drying chamber.   The hand drying apparatus according to claim 1 or 2, wherein a rear side upper end of the extension part is disposed above a rear side upper end of the water receiving plate.   The back surface side of the water receiving plate is bent downward, and the lower end of the bent portion is subjected to hemming processing that is folded back to the front surface side. The hand dryer according to one item.

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