JP3770255B2 - Hand dryer - Google Patents

Description

  The present invention relates to a hand drying apparatus for hygienically and quickly drying wet hands after washing.

  In order to maintain the hand in a sanitary state, it is necessary to perform a hand-washing treatment and a drying treatment after washing in a sanitary manner. For this purpose, a wet hand is directly dried by washing, for example, JP-A-2-23918. A hand-drying device as disclosed in the Japanese Patent Publication No. Gazette is used. The conventional hand-drying apparatus shown in the above publication is composed of air blowing means composed of an induction motor and blades rotating thereby, and heating means using an electric heater. The blowing means forms an air flow blown to the hand drying section by the rotation of sirocco type blades, and the electric heater heats the air flow formed by the blowing means, and the air flow blown to the hand drying section is used as hot air.

  In the hand drying device having the above-described configuration, the hand can be hygienically dried by holding the wet hand over the hand drying unit that is blowing hot air. That is, the moisture of the hand that has been exposed to the hot air is evaporated by the heat and removed from the hand. However, this type is a method of evaporating with heat rather than blowing off moisture with the wind with slow wind speed and hot air, and it takes a long time for the drying process and is troublesome to use.

  Such a problem is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-154138 and Japanese Patent Application Laid-Open No. 5-293055 in which water adhering to the hand is blown off by utilizing the kinetic energy of the air flow without being evaporated. This has been solved by the development of hand dryers. This type is configured such that a high-speed air stream having high kinetic energy is ejected by a nozzle in the vicinity of an insertion port of a processing chamber where a hand can be inserted and removed. When a wet hand is put into the processing chamber from the insertion port, a high-speed air flow is ejected from the nozzle, and when the hand is pulled out from the insertion port, moisture attached to the hand is blown away from the hand in a very short time without contact with anything other than the airflow. Sanitary drying is performed.

JP 02-23918 (page 2-4, Fig. 1) JP 63-154138 A (page 2-3, FIG. 1) JP 05-293055 A (page 5-10, FIG. 3)

  In the above-described conventional hand drying apparatus that blows away moisture adhering to the hand by a high-speed air flow, the water sometimes rebounds to the user during the drying process. Also, this type of equipment is often used in places such as lavatories where water is used for cleaning, and if the water used for cleaning adheres to the surface of the outer shell, the blower that creates high-speed airflow There was a problem that water was sucked together with air from the suction port, leading to blower failure. Such a problem becomes apparent when the blower suction port is provided at the lower part of the main body.

  On the other hand, this type of hand dryer is equipped with an air filter that collects dust at the suction port of the blower. However, since it is necessary to clean the collected dust regularly, most of them are externally used. The structure which can be attached or detached easily is taken. Therefore, if you forget to attach the air filter during cleaning, or if it is installed in a public toilet or public facilities that are used by an unspecified number of people, the air filter may be removed by mischief, causing failure without the air filter. May be used in an inappropriate state.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a hand-drying device capable of preventing the scattering of water to the outside.

In order to solve the above-described problems, the present invention provides a high-pressure air generator having a blower for generating high-pressure air therein, a water receiving portion provided below the high-pressure air generator, and a front lower portion of the high-pressure air generator. Is formed in a horizontal arc, opens obliquely downward with a blow angle of 5 to 30 degrees toward the back side, and the high-pressure air generated by the blower is blown out from the high-pressure air generator And an airflow jet nozzle.

  As described above, as is clear from the description of the embodiment, according to the present invention, a hand-drying device that can prevent the scattering of water to the outside can be obtained.

Next, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1, 2 and 3 show the hand dryer of the first embodiment. As shown in FIG. 1, the hand dryer includes an upper high-pressure air generator 1 and a lower water receiver 2, and a space between the high-pressure air generator 1 and the water receiver 2 is configured as a processing space 3. In addition, it can be attached to a wall such as a washroom at the back via an attachment plate. The high-pressure air generating unit 1 is configured by incorporating a blower 7 including a motor 5 and a turbo fan 6 rotated by the motor 5 in a casing 4 having a box-shaped container structure. The blower 7 is housed in the blower case 8 with the suction side on the back side and the exhaust side on the front side. The suction side of the blower 7 communicates with the upper end portion of the air passage 9 that is defined on the back side of the high-pressure air generator 1 and that extends in the vertical direction. The air passage 9 has a lower end that opens downward as a connection port 10. As shown in FIG. 1, a second air filter 11 is fixed to the connection port 10 by a welding dowel.

  A blower outlet is opened at the front lower part of the blower case 8 on the exhaust side of the blower 7, and an airflow jet nozzle 12 that converts high-pressure air generated by the blower 7 into a high-speed airflow as a working airflow is attached to the blower outlet. ing. The jet port 13 of the airflow jet nozzle 12 is formed by a row of slits or small holes that are formed in a slightly circular arc in the lateral direction at the front of the lower surface of the casing 4 and open downward, and 5 to 30 degrees on the back side of the processing space 3. It is directed diagonally downward with an angle of. Between the blower outlet of the blower case 8 and the airflow jet nozzle 12, a heater 14 is built in that raises the temperature of the high-pressure air passing therethrough. Further, a light emitting element and a light receiving element constituting the hand detection sensor 15 are mounted side by side near the jet outlet 13 on the lower surface of the high-pressure air generating unit 1, and the presence or absence of a hand by receiving reflected light of the light emitting element. Can be detected.

  A circuit board 16 is covered with a sheet metal cover 17 and incorporated above the blower case 8. The back side of the sheet metal cover 17 is open, and the radiating fins 18 attached to the circuit board 16 are arranged facing the open part. Near this open part of the sheet metal cover 17, there is a mating part 19 between the back side and the front side of the casing 4, straddling the mating part 19 on the inner side, and covering the open part with a gap from the outside. Is attached (see FIG. 2). This waterproof member 20 prevents water from entering the circuit board 16 even if water enters from the mating portion 19, so that it is not necessary to take waterproof measures such as applying silicon to the mating portion 19 of the casing 4 or interposing packing. become. The waterproof member 20 may be integrated with the back member 41 of the high-pressure air generator 1.

  As shown in FIG. 3, the power cord 21 of the high-pressure air generator 1 is drawn to the outside from an outlet 23 that is open on the back surface of the casing 4. On the inner side of the outlet 23, there is an open waterproof box structure 24 at the top where the end of the bottom is connected to the lower edge of the outlet 23 and the ends of both sides are connected to the edges of the outlet 23. It is integrally formed. The power cord 21 is drawn from the upper portion of the waterproof box structure 24 to the outside through the waterproof box structure 24 and the outlet 23. Therefore, even if water flows down from the upper part through the back surface of the casing 4 and enters through the outlet 23, the waterproof box structure 24 prevents further intrusion into the interior, and a separate part such as a rubber bush is used. This is an effective waterproofing measure for the outlet 23 without any problems.

  The water receiving portion 2 is composed of a substantially L-shaped base body having a tank receiver 26 protruding forward at the lower part of the back structure 25, and a drain tank 27 that is detachably received by the tank receiver 26 of the base body. The upper end of the back structure 25 is connected to the connection port 10 of the air passage 9 of the high-pressure air generating unit 1 with a screw. The interior of the back structure 25 of the water receiving portion 2 is configured as a vent passage 28 communicating vertically, and a series of vent passages 9 and 28 are formed by connection to the connection port 10 of the high-pressure air generating portion 1. The lower end of the air passage 28 of the water receiving portion 2 opens as a suction port 29, and a detachable first air filter 30 is mounted. The first air filter 30 has substantially the same performance as the second air filter 11 fixed to the connection port 10 of the high-pressure air generation unit 1, and removes dust contained in the air sucked from the suction port 29. Remove.

  The drain tank 27 is a container body having an open upper surface, and a locking piece 32 having a protrusion 31 on the upper surface protrudes from the back surface of the drain tank 27. A presser spring (not shown) provided on the upper back side is attached to the tank receiver 26 by being hooked on the protrusion 31 of the locking piece 32. The protrusion 31 and the presser spring of the locking piece 32 may be configured by a locking device called a latch and strike. On the periphery of the open portion of the upper surface of the drain tank 27, an overhang 33 having a gentle downward slope is integrally formed, and the open portion has a drain port 34 that communicates with the inside of the drain tank 27 on the inside thereof. The tank cover 35 is closed. The tank cover 35 is provided with a gradient for allowing water to flow through the drain port 34.

  The processing space 3 is a space defined by the lower surface of the high-pressure air generating unit 1, the back structure 25 of the water receiving unit 2, and the tank cover 35 mounted on the upper surface of the drain tank 27. It is configured as an open space in which a hand can be freely put out on the front surface which becomes the mouth 36 and the following both sides. The working airflow from the high-pressure air generating unit 1 is jetted into the processing space 3 obliquely from the front to the back side from the top to the bottom.

  This hand dryer is usually attached to a wall surface of a washroom or the like at a height at which the treatment space 3 is located at the position of the hand that is naturally extended when a person faces. When a wet hand is inserted into the processing space 3 from the insertion port 36 of the hand dryer attached in this way, the hand sensor 15 detects the presence of the hand, the blower 7 and the heater 14 operate, A working airflow is blown into the processing space 3. Moisture adhering to the hand put out into the processing space 3 is blown off to the back side of the processing space 3 by the working airflow formed in the vicinity of the insertion port 36, and is received by the tank cover 35 and soon from the drain port 34 to the drain tank. 27 is stored. The wet hand is thus quickly dried. When the hand that has been dried is pulled out of the processing space 3, the hand detection sensor 15 detects the absence of the hand, the blower 7 and the heater 14 are stopped, and the hand dryer is in a standby state.

  Air is supplied to the blower 7 from a suction port 29 at the bottom of the water receiving portion 2, and the air sucked from the suction port 29 is dedusted by a first air filter 30, cleaned, and received by a water receiver. The air passes through the second air filter 11 through the air passage 28 of the part 2, reaches the air passage 9 of the high-pressure air generating part 1, is sucked into the blower 7, is pressurized, and is exhausted to the blower case 8. The high-pressure air exhausted to the blower case 8 is heated by the heater 14 when it exits from the blower outlet of the blower case 8, converted into a high-speed air flow as a working airflow by the airflow jet nozzle 12, and blown out to the processing space 3. . The working air current blown into the processing space 3 has an angle of 5 degrees to 30 degrees on the back side of the processing space 3, so that moisture of the hand is blown away toward the back side of the processing space 3, and thus inserted. Water scattering from the mouth 36 to the outside is avoided.

  In this hand dryer, even if the first air filter 30 is forgotten to be attached at the time of cleaning or has been removed by mischief, the second air filter 11 functions in the same way as the first air filter 30 and breaks down. Appropriate operating conditions that do not cause any problems can be maintained. Even if the second air filter 11 is not necessarily fixed, it is not removed because it is housed inside. However, since the first air filter 30 normally functions, the second air filter 11 is not removed. Since the number of times of maintenance of the filter 11 is small, it may be fixed as in this embodiment. Further, the mounting position of the second air filter 11 may be anywhere from the first air filter 30 to the suction port of the blower 7 on the downstream side.

Embodiment 2. FIG.
4 to 8 show a hand dryer according to the second embodiment. This hand dryer is the same as that shown in Embodiment 1 except for the configuration of the suction port portion of the water receiver 2. Therefore, the same reference numerals as those of the first embodiment are used for the same parts as those of the first embodiment, and description thereof will be omitted.

  In many cases, hand dryers are used in places such as washrooms where water is used for cleaning. The suction port of blower 7 creates a high-speed air flow when the water used for cleaning adheres to the surface of the outer shell. Water is sucked together with the air, and the blower 7 is likely to break down. In particular, when the suction port 29 for the blower 7 is provided at the lower end, the water from the upper side travels along the surface and collects at the lower end, so that it becomes obvious. In order to prevent this, the hand-drying apparatus of the second embodiment has a water separation that prevents the suction of water around a suction port 29 that opens to the outside at the lower end of the water receiving portion 2 as shown in FIGS. A structure is provided. As the water separation structure, it is only necessary to form a course of water that keeps the flowing water away from the rim of the suction port 29, and as a concave groove 37 that surrounds the entire circumference at a distance from the suction port 29 It may be 38.

  By providing such a water separation structure, the water flowing down from above is guided to the outside of the groove 37 as shown in FIGS. The course is cut off, and the suction from the suction port 29 can be avoided. If the water separation structure is constituted by a plurality of barriers 39 that are arranged in a staggered manner in which the tips are three-dimensionally overlapped with each other in the flow direction inside the suction port 29 as shown in FIG. 7, the downward suction port 29 and the suction port 29 facing sideways can be accommodated. That is, the water droplets sucked together with the air cannot behave together with the air because of its large mass, and are caught by the barrier 39 one after another and eventually gathered and dropped into the blower 7. Can be avoided. If the tip 40 of the barrier 39 is formed in a bowl shape as shown in FIG. 8 with the upstream side facing the upstream side, the function of preventing the barrier 39 from entering water is further improved. Other functions are the same as those of the first embodiment.

1 is an exploded perspective view of a hand drying device according to Embodiment 1. FIG. It is a vertical side view of the hand-drying apparatus of Embodiment 1. FIG. 3 is a partial configuration diagram of a lead-out portion of the power cord according to the first embodiment. It is a general-body perspective view of the hand-drying apparatus of Embodiment 2. It is sectional drawing which shows the water separation structure of the hand dryer of Embodiment 2. It is sectional drawing which shows the other water separation structure of the hand dryer of Embodiment 2. It is sectional drawing which shows the other water separation structure of the hand dryer of Embodiment 2. It is sectional drawing which shows the other water separation structure of the hand dryer of Embodiment 2.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 High pressure air generating part, 2 Water receiving part, 3 Processing space, 7 Blower, 11 2nd air filter, 12 Airflow ejection nozzle, 29 Suction port, 30 1st air filter, 36 Insertion port, 37 Concave groove, 38 Ridges, 39 barriers.

Claims (1)

A high-pressure air generator having a blower for generating high-pressure air inside;
A water receiver provided below the high-pressure air generator,
The high-pressure air generator is provided at the front lower portion of the high-pressure air generating section, forms a circular arc in the lateral direction, opens obliquely downward with a blow angle of 5 degrees to 30 degrees toward the back side, and the high-pressure air generated by the blower is A hand-drying device comprising an air-flow ejection nozzle that ejects from a high-pressure air generation unit to the outside.

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