WO2007013142A1 - 手乾燥装置 - Google Patents

手乾燥装置 Download PDF

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Publication number
WO2007013142A1
WO2007013142A1 PCT/JP2005/013652 JP2005013652W WO2007013142A1 WO 2007013142 A1 WO2007013142 A1 WO 2007013142A1 JP 2005013652 W JP2005013652 W JP 2005013652W WO 2007013142 A1 WO2007013142 A1 WO 2007013142A1
Authority
WO
WIPO (PCT)
Prior art keywords
hand
drying
infrared
infrared light
emitting element
Prior art date
Application number
PCT/JP2005/013652
Other languages
English (en)
French (fr)
Inventor
Yoshihiro Fukaya
Syunichi Mori
Yasuyuki Itoigawa
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to US11/884,122 priority Critical patent/US7971368B2/en
Priority to EP05767424.4A priority patent/EP1908384B1/en
Priority to PCT/JP2005/013652 priority patent/WO2007013142A1/ja
Priority to KR1020077016912A priority patent/KR100909730B1/ko
Priority to JP2006527178A priority patent/JP4105209B2/ja
Priority to CNA2005800334853A priority patent/CN101035455A/zh
Priority to TW094125860A priority patent/TWI278300B/zh
Publication of WO2007013142A1 publication Critical patent/WO2007013142A1/ja

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/48—Drying by means of hot air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/11—Automated chemical analysis
    • Y10T436/111666—Utilizing a centrifuge or compartmented rotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
    • Y10T436/2575—Volumetric liquid transfer

Definitions

  • the present invention relates to a hand drying device for hygienically drying wet hands after cleaning, and more specifically, a hand capable of preventing malfunction when a person approaches, with high accuracy. It relates to drying equipment.
  • a hand drying device that blows and dries water droplets adhering to the hands by a high-speed air flow.
  • a box is provided with a hand insertion portion as a processing space in a concave shape, and an air nozzle is provided in the hand insertion portion.
  • the air nozzle is connected to an air duct connected to the high-pressure airflow generator, and jets high-speed airflow into the manual insertion section.
  • the water blown into the hand drying processing space by the hand drying process is dropped and received from a drain port provided at the bottom of the hand insertion part into a drain container provided below the hand insertion part.
  • a hand detection device comprising an infrared light emitting element and an infrared light receiving element is provided on the wall surface forming the hand drying processing space, and the hand is inserted into the hand drying processing space by this hand detection device.
  • a high-speed air flow is ejected based on the detected signal.
  • the infrared light emitting element and the infrared light receiving element are disposed so as to be opposed to, for example, the front side wall surface and the rear side wall surface that form the hand drying processing space.
  • the structure of the main body is arranged by placing infrared light emitting elements and light receiving elements at different positions.
  • the pressure loss of the air passage increases and the cost of the main body increases.
  • Patent Document 1 discloses a reflected light detection type hand detection device in which an infrared light emitting element for detecting a hand inserted in a hand drying processing space and an infrared ray light receiving element are arranged on the same wall surface.
  • an infrared light emitting element and an infrared light receiving element disposed on the same wall surface.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 11 318760
  • Patent Document 1 in order to eliminate a malfunction when a person approaches the vicinity of the main body, a reference value for comparing the received light intensity when a hand is inserted is used. However, the detection range of the hand is narrowed by increasing the reference value for comparing the received light intensity.
  • the present invention has been made in view of the above, and can prevent a malfunction when a person other than the user approaches the vicinity of the main body with high accuracy and can maintain a wide hand detection range.
  • the purpose is to obtain a hand dryer.
  • the present invention is directed to a high-pressure airflow generator that generates a high-pressure airflow, and a high-pressure airflow generated by the high-pressure airflow generator And a hand insertion part into which a hand can be inserted / removed, and a drying process space is formed in which a hand inserted through the hand insertion part is subjected to a drying process with the high-pressure airflow emitted from the nozzle force.
  • a space forming part, and an infrared light emitting element for detecting a hand inserted in the drying treatment space and an infrared light receiving element are disposed on the same wall surface of the dry space forming part,
  • a hand dryer that drives and controls the high-pressure airflow generator based on a detection signal of the hand detector, at least a portion of the wall surface of the dry space forming portion facing the infrared light emitting element of the hand detector.
  • Infrared JP that morphism rate to form an infrared absorbing portion that absorbs infrared smaller than the hand It is a sign.
  • the infrared light absorbing portion that absorbs infrared rays with the infrared reflectance smaller than the hand is formed on the wall surface facing the infrared light emitting element in the dry space forming portion.
  • Infrared rays emitted from the element are almost absorbed by the infrared ray absorption part provided at the opposite site, so it is highly accurate to detect malfunctions due to irregular reflection of infrared rays when a person other than the user approaches the body. Can be prevented.
  • FIG. 1 is a right side cross-sectional view showing a hand drying apparatus according to Embodiment 1.
  • FIG. 2 is a schematic diagram of the hand detection device according to the first embodiment.
  • FIG. 3 is a schematic diagram of a hand detection device according to the first embodiment.
  • FIG. 4 is a right side cross-sectional view showing a modified example of the hand dryer in the first embodiment.
  • FIG. 5 is a right side cross-sectional view showing the hand drying apparatus in the second embodiment.
  • FIG. 1 is a right side cross-sectional view of the hand dryer according to Embodiment 1
  • FIGS. 2 and 3 are plan views showing parts related to the hand detector.
  • the hand drying apparatus has a main body box 1 composed of a base 5 that forms a rear outer shell and a front panel 7 that forms a front outer shell.
  • a concave space that functions as the manual insertion portion 3 and the drying treatment space 6 is formed.
  • the concave space is open on both sides and has an open sink shape that can be inserted and removed by the hand.
  • a high-pressure airflow generator 2 is incorporated in the main body box 1, and the high-pressure airflow generated by the high-pressure airflow generator 2 is in the vicinity of the hand insertion portion 3 via the air passage 16. It is guided to the air nozzle 4 provided on the front side wall surface and the rear side wall surface. A high-speed air stream is jetted from these air nozzles 4 into the hand insertion part 3 to blow off water adhering to the hand placed in the hand insertion part 3 to the drying treatment space 6 and the blown water is inclined at the bottom of the concave space. The collected water is collected in the drain container 14 through the drain 12 at the lower end of the slope.
  • a drain pipe 13 that carries water is connected to the drain port 12.
  • the drain container 14 with an open container structure that stores the water carried in the drain pipe 13 is detachable by inserting and removing in the front-rear direction. It is
  • the drain container 14 is provided with a removable lid.
  • the drain container 14 and the lid are made of chemical-resistant PP or ABS grease, and can be cleaned and cleaned using a neutral detergent or alcohol.
  • the wall surface forming the drying treatment space 6 is impregnated with a water-repellent coating such as silicon or fluorine, or a hydrophilic coating such as titanium oxide, or an antibacterial agent, so that dirt adheres to the surface. Mitigation and bacterial growth are being reduced.
  • the high-pressure airflow generator 2 includes a DC brushless motor (which may be a normal commutator motor or an induction conductive motive), a drive circuit that drives the DC brushless motor, and a turbo fan that is rotated by the DC brushless motor. In this embodiment, it is attached directly below the hand insertion portion 3. 17 is an air inlet of the blower, 18 is an air intake provided below the box 1, and the air intake 18 can suck air through the removable air filter 15! / .
  • a hand detection device 8 is provided on the back side of the wall surface forming the drying processing space 6, and the drying processing space 6 is passed through the hand insertion unit 3 based on the detection signal of the hand detection device 8. Detects the presence or absence of a hand inserted into the.
  • the hand detection device 8 includes an infrared light emitting element 20 and an infrared light receiving element 19, a substrate (not shown) on which the infrared light emitting element 20 and the infrared light receiving element 19 are mounted, a holder (not shown) that holds the substrate, and It is equipped with a cover (not shown) that can prevent the intrusion of water droplets and transmit infrared signals. As shown in FIG. 2 or FIG.
  • this hand detection device 8 has one or more sets of infrared light emitting elements 20 and infrared light receiving elements 19 disposed on the same wall, and is output from the infrared light emitting elements 20.
  • the configuration of a reflection type detection device is employed in which the presence or absence of a hand is detected by the infrared light receiving element 19 detecting the light reflected by the hand 21.
  • the hand detection device may be composed of a set of infrared light emitting elements 20 and infrared light receiving elements 19, or a plurality of sets of infrared light emitting elements 20 and 20 as shown in FIG.
  • the number of arrangements is determined according to the required detection range which may be constituted by the infrared light receiving element 19.
  • the detection signal of the infrared light receiving element 19 is input to a control circuit (not shown) equipped with a microcomputer, and the control circuit compares the detection signal from the infrared light receiving element 19 with a predetermined reference value to detect it. If the value is larger than the reference value, it is determined that a hand has been inserted.
  • the control circuit When it is determined that a hand has been inserted, the high-pressure airflow generator 2 is energized to blow out a high-speed airflow from the air nozzle 4 and start operation. If is below the reference value, the operation is stopped.
  • At least a portion of the inner wall surface forming the drying treatment space 6 facing the infrared light emitting element 20 of the hand detection device 8 reflects infrared rays.
  • An infrared absorbing part 10 that absorbs infrared rays with a smaller rate than the hand is provided.
  • the hand detection device 8 is provided on the inner wall surface on the back side among the inner wall surfaces forming the drying treatment space 6, the infrared ray absorbing unit 10 is provided on the inner wall surface on the front side.
  • two infrared light emitting elements 20 are arranged so as to be opposed to these two positions.
  • FIG. 1 two infrared light emitting elements 20 are arranged so as to be opposed to these two positions.
  • the force that the infrared absorbing portion 10 is provided only on the portion of the inner wall surface that forms the drying treatment space 6 that faces the infrared light emitting element 20.
  • Part 10 may be provided.
  • one hand detection device 8 and two infrared absorbers 10 are configured.
  • a plurality of hand detection devices are arranged in the drying space, for example, in the vertical direction as necessary. Even if,
  • the infrared absorbing portion 10 is preferably applied with a darker color material such as black, which has a lower infrared reflectance and a higher infrared absorption rate, or a dark surface material or material. It forms using.
  • the infrared light of the infrared light emitting element 20 is in the drying processing space 6. May be reflected irregularly and output to the outside of the main body, and the infrared light may be reflected to a person and input to the infrared light receiving element 19, resulting in malfunction.
  • the reference value for starting operation is set high as in the conventional technology, a large amount of reflected light is required. The hand detection range will become narrow.
  • the infrared absorbing section 10 is provided on the wall surface in the drying processing space 6 facing the infrared light emitting element 20 as in the present embodiment, the light output to the outside is almost equal to the reference value for driving. It can be set to a low setting and the hand detection range can be widened.
  • the infrared light emitting element and the infrared light receiving element are arranged at different positions facing the wall surface of the drying processing space, and the presence or absence of the hand is blocked by blocking the light to the light receiving element.
  • the first problem is that the hand detection device needs to be arranged at a position where a part of the air passage is blocked in order to obtain a detection position with good start of operation. Increased pressure loss.
  • As a second problem in order to obtain a good detection position for shutdown, it is necessary to place the hand detection device at the uppermost part on the front side of the main body, so the hand insertion position becomes high and the usability becomes poor.
  • the hand detection device can be concentrated on either the front side or the back side, so the structure around the air passage can be simplified and the cost can be reduced. At the same time, the pressure loss of the air passage is improved. Further, as shown in FIG. 1 where the hand detecting device 8 is required to be disposed at the uppermost part 11 on the front side of the main body, the hand detecting device 8 can be disposed in the depth of the drying processing space 6 and the usability is improved. In addition, as shown in FIG. 3, by increasing the number of infrared light receiving elements 19 and infrared light emitting elements 20, the hand detection range can be within the drying process space 6 even when the main body width is long.
  • the distance between the front side wall surface and the rear side wall surface of the drying treatment space 6 is large (about 150 mm), the amount of infrared reflection by the wall surface when the hand is not inserted and when the hand is inserted Since a sufficient difference in the amount of reflection by the hand can be obtained, it is only necessary to provide a reflection type hand detection device.
  • the distance between the wall surfaces is narrow (about 40 to: LOOmm), Since the difference between the amount of infrared reflection by the wall and the amount of reflection by hand during hand insertion cannot be obtained sufficiently, good detection sensitivity cannot be obtained.
  • the problem is that the reflectance of the portion facing the infrared light emitting element is higher than that of the hand.
  • the reflectance of the portion facing the infrared light emitting element is higher than that of the hand.
  • the front-side hand detection device thickens the space between the inner wall surfaces of the front panel, and the feeling of insertion is impaired. Therefore, a hand that combines the reflection-type hand detection device 8 and the infrared absorber is used. By using the detection method, hand detection devices can be concentrated on the back side of the drying processing space, and good use and convenience can be obtained.
  • FIG. 4 shows a modification of the hand drying device of the first embodiment.
  • the hand detection device 8 is arranged on the inner wall surface on the front side of the drying processing space 6.
  • the infrared absorbing part 10 is placed on the inner wall surface on the back side of the inner wall surface forming the drying treatment space 6.
  • a hand detection device 8 comprising an infrared light emitting element 20 and an infrared light receiving element 19 is arranged on the back side in the drying processing space 6 and faces the infrared light receiving element 19 of the hand detection device 8.
  • An infrared light emitting element 9 is provided at a position on the front side, and the hand inserted in the vicinity of the hand insertion portion 3 in the drying processing space 6 is caused by the infrared light emitting element 20 and the infrared light receiving element 19 incorporated in the hand detection device 8.
  • the hand that is detected by the reflection type configuration and inserted in the back side of the drying processing space 6 is detected by the transmission type configuration by the infrared light emitting element 9 and the infrared light receiving element 19.
  • the infrared light emitting element 20 received by the infrared light receiving element 19 and the infrared rays A and B from the infrared light emitting element 9 are appropriately identified by performing timing control or wavelength identification.
  • the hand is detected by blocking infrared rays A and B of either the infrared light emitting element 20 or infrared light emitting element 9 of the hand detecting device 8, and the hand reaches the point of the infrared ray B.
  • a signal is transmitted to the microcomputer mounted on the control circuit, and the high-pressure airflow generator 2 starts operation.
  • infrared A is arranged near the hand insertion part 3, operation is continued even if there is a hand around the hand insertion part 3. If you have no hands, stop driving.
  • the hand inserted in the drying processing space 6 is detected by the cooperation of the reflective infrared light emitting element and the infrared light receiving element and the transmission infrared light emitting element and the infrared light receiving element.
  • the infrared absorbing portion 10 described above is provided at a portion facing the reflective infrared light emitting element.
  • the infrared light receiving element 19 of the hand detection device 8 commonly receives the infrared light generated from the infrared light emitting elements 20 and 9, but the infrared light emitted from the infrared light emitting element 9 is used.
  • An infrared light receiving element that specifically receives light may be separately provided on the back side in the drying processing space 6.
  • a dedicated infrared light emitting element for performing transmission detection is provided on the wall surface (in the rear side in the case of FIG. 5) on which the hand detection device 8 is provided, and a drying treatment space 6 is provided for this dedicated infrared light emitting element.
  • the hand dryer according to the present invention is useful for a hand dryer provided with an infrared light emitting element and a hand detecting device for detecting a hand inserted by the infrared light receiving element.

Abstract

　高圧空気流を発生する高圧空気流発生装置２と、高圧空気流発生装置２により生成された高圧空気流を噴出するノズル４と、手を挿抜可能な手挿入部３を有し、この手挿入部３を介して挿入された手をノズル４から出射された高圧空気流で乾燥処理する乾燥処理空間６が形成された乾燥処理空間形成部と、乾燥処理空間に挿入された手を検出するための赤外線発光素子および赤外線受光素子が乾燥処理空間形成部の同一壁面に配設される１～複数の手検出装置８とを備え、手検出装置８の検出信号に基づいて高圧空気流発生装置２を駆動制御する手乾燥装置において、乾燥処理空間形成部の壁面における少なくとも手検出装置８の赤外線発光素子に対向する部位に、赤外線の反射率が手よりも小さくて赤外線を吸収する赤外線吸収部１０を形成し、使用者以外の人が本体近傍に近づいたときの誤動作を高精度に防ぐとともに、手検出範囲を広く維持する。

Description

明 細 書
手乾燥装置
技術分野
[0001] 本発明は、洗浄後の濡れた手を衛生的に乾燥させるための手乾燥装置に関し、さ らに詳しくは人が近づいた際の誤作動を高精度に防止することが可能な手乾燥装置 に関するものである。
背景技術
[0002] 洗浄後の濡れた手を乾燥させる装置として、高速空気流により手に付着した水滴を 吹き飛ばし乾燥させる手乾燥装置がある。この装置は、箱体に凹状形態に処理空間 としての手挿入部が設けられ、手挿入部にはエアーノズルが配設されている。エアー ノズルには高圧空気流発生装置に接続されたエアーダクトが繋がれ、手挿入部内に 高速空気流を噴出するようになっている。手の乾燥処理に伴い手乾燥処理空間内に 吹き飛ばされた水は、手挿入部の底部に設けられた排水口から手挿入部の下方に 備えられたドレン容器に滴下し受容される。
[0003] このような手乾燥装置においては、手乾燥処理空間を形成する壁面に赤外線発光 素子、赤外線受光素子から成る手検出装置を設け、この手検出装置によって手乾燥 処理空間への手の挿入を検出し、その検出信号に基づいて高速空気流を噴出させ るようにしていることが多い。
[0004] 赤外線発光素子、赤外線受光素子の配設方式としては、赤外線発光素子および 赤外線受光素子を手乾燥処理空間を形成する例えば正面側壁面と背面側壁面とに 対向するように配置し、受光素子への光を遮断することで手の有無を検出する透過 型の検出方式があるが、この透過型の検出方式では、赤外線発光素子、受光素子を 別々の位置に配置することで本体の構造が複雑化してしまい、送風路の圧力損失の 増加や、本体のコストアップになってしまうという問題がある。
[0005] 特許文献 1には、手乾燥処理空間に挿入された手を検出する赤外線発光素子、赤 外線受光素子を同一壁面に配設した反射光検出型の手検出装置が示されている。 この特許文献 1においては、同一壁面に配設された赤外線発光素子、赤外線受光 素子を吹き出し口の下方内側に照準が合うように傾けて配設することで、手検出範囲 を制限し、使用者以外の人が本体の近傍に近づ ヽても誤動作しな 、ようにして 、る。
[0006] 特許文献 1 :特開平 11 318760号公報
発明の開示
発明が解決しょうとする課題
[0007] しかしながら、特許文献 1に示された従来の手乾燥装置では、乾燥処理空間を形 成する壁面に赤外線反射に対する考慮が特になされていないので、乾燥処理空間 を形成する壁面で乱反射して本体力 外部に出ていく赤外線が多くなり、使用者以 外の人が本体近傍に近づくと、受光部が検出し、動作を開始してしまうという誤動作 が発生する可能性が高い。
[0008] また、特許文献 1では、人が本体近傍に近づいた時の誤動作をなくすため、手が挿 入された際の受光強度比較のための基準値を、人が本体近傍に近づいたときよりも 高くしているが、受光強度比較の基準値を高くすることによって、手の検出範囲が狭 くなつてしまう。
[0009] この発明は、上記に鑑みてなされたものであって、使用者以外の人が本体近傍に 近づいたときの誤動作を高精度に防ぐとともに、手検出範囲を広く維持することがで きる手乾燥装置を得ることを目的とする。
課題を解決するための手段
[0010] 上述した課題を解決し、目的を達成するために、本発明は、高圧空気流を発生す る高圧空気流発生装置と、該高圧空気流発生装置により生成された高圧空気流を 噴出するノズルと、手を挿抜可能な手挿入部を有し、この手挿入部を介して挿入され た手を前記ノズル力 出射された高圧空気流で乾燥処理する乾燥処理空間が形成 された乾燥処理空間形成部と、前記乾燥処理空間に挿入された手を検出するため の赤外線発光素子および赤外線受光素子が乾燥空間形成部の同一壁面に配設さ れる 1〜複数の手検出装置とを備え、前記手検出装置の検出信号に基づいて前記 高圧空気流発生装置を駆動制御する手乾燥装置にぉ 、て、前記乾燥空間形成部 の壁面における少なくとも前記手検出装置の赤外線発光素子に対向する部位に、赤 外線の反射率が手よりも小さくて赤外線を吸収する赤外線吸収部を形成したことを特 徴とする。
発明の効果
[0011] この発明によれば、乾燥空間形成部における赤外線発光素子に対向した壁面に、 赤外線の反射率が手よりも小さくて赤外線を吸収する赤外線吸収部を形成するよう にしたので、赤外線発光素子から発射された赤外線は、対向部位に設けられた赤外 線吸収部でほぼ吸収されることになるので、使用者以外の人が本体近傍に近づいた ときの赤外線の乱反射による誤動作を高精度に防ぐことができる。また、従来技術の ように、手検出範囲を狭める必要がないので、使用中の運転停止なく快適に装置を 使用することができる。
図面の簡単な説明
[0012] [図 1]図 1は、実施の形態 1における手乾燥装置を示す右側面断面図である。
[図 2]図 2は、実施の形態 1における手検出装置の概略図である。
[図 3]図 3は、実施の形態 1における手検出装置の概略図である。
[図 4]図 4は、実施の形態 1における手乾燥装置の変形例を示す右側面断面図であ る。
[図 5]図 5は、実施の形態 2における手乾燥装置を示す右側面断面図である。
符号の説明
[0013] 1 本体箱体
2 高圧空気流発生装置
3 手挿入部
4 エアーノズル
5 ベース
6 乾燥処理空間
7 正面パネノレ
8 手検出装置
9 赤外線発光素子
10 赤外線吸収部
12 排水口 13 排水管
14 ドレン容器
15 エアーフイノレタ
16 送風路
18 空気取入口
19 赤外線受光素子
20 赤外線発光素子
21 手
発明を実施するための最良の形態
[0014] 以下に、本発明にかかる手乾燥装置の実施の形態を図面に基づいて詳細に説明 する。なお、この実施の形態によりこの発明が限定されるものではない。
[0015] 実施の形態 1.
図 1〜図 3を用いて本発明の実施の形態 1について説明する。図 1は、実施の形態 1の手乾燥装置の右側面断面図を示すもので、図 2,図 3は手検出装置に係わる部 分を示す平面図である。
[0016] 図 1に示すように、この手乾燥装置は、背面外殻をなすベース 5と、正面外殻をなす 正面パネル 7とから構成される本体箱体 1を有する。本体箱体 1の上部側には、手挿 入部 3および乾燥処理空間 6として機能する凹状空間が形成されている。凹状空間 は、両側面が開放され、手の挿抜可能な開放シンク状を呈している。
[0017] 本体箱体 1内には、高圧空気流発生装置 2が組み込まれており、高圧空気流発生 装置 2により生成された高圧空気流は送風路 16を介して手挿入部 3の近傍の正面側 壁面および背面側壁面に設けられたエアーノズル 4に導かれる。これらエアーノズル 4から高速空気流を手挿入部 3内に噴射して、手挿入部 3に入れた手に付着された 水分を乾燥処理空間 6に吹き飛ばし、吹き飛ばした水を凹状空間の底の傾斜が付い た水受け部で回収し、その回収した水を傾斜下端の排水口 12を介してドレン容器 1 4に溜めるようになつている。
[0018] 排水口 12には水を運ぶ排水管 13が接続されている。排水管 13で運ばれた水を貯 溜する開放容器構造のドレン容器 14は、前後方向への抜き差しにより脱着可能に設 けられている。ドレン容器 14には取外し可能な蓋が設けられている。なお、ドレン容 器 14と蓋は、耐薬品性のある PPまたは ABS榭脂などで作られ、中性洗剤及びアル コール等を使って洗净し清掃することができる。また、乾燥処理空間 6を形成する壁 面には、シリコン系もしくはフッ素系等の撥水性コーティング、又は酸化チタン等の親 水性を有するコーティング、又は抗菌剤が含浸され、表面への汚れの付着の軽減や 細菌の繁殖の低減が図られている。
[0019] 高圧空気流発生装置 2は、 DCブラシレスモーター（通常の整流子モーター又は誘 導電動機であっても良い）と、これを駆動させる駆動回路と、 DCブラシレスモーター によって回転するターボファンにより構成され、この実施の形態では手挿入部 3の直 下に取付けられている。 17は送風機の吸込み口、 18は箱体 1の下方に設けられた 空気取入口であり、空気取入口 18は着脱可能なエアーフィルタ 15を通じて空気を 吸込むことができるようになって!/、る。
[0020] 乾燥処理空間 6を形成する壁面の背面側には、手検出装置 8が設けられており、こ の手検出装置 8の検出信号に基づいて手挿入部 3を介して乾燥処理空間 6に差し込 まれた手の有無を検出する。手検出装置 8は、赤外線発光素子 20および赤外線受 光素子 19と、赤外線発光素子 20および赤外線受光素子 19が搭載される基板（図示 せず)と、基板を保持するホルダ（図示せず)および水滴などの浸入を防止し赤外線 信号を透過できるカバー（図示せず)を備えている。この手検出装置 8は、図 2または 図 3に示すように、一組または複数組の赤外線発光素子 20および赤外線受光素子 1 9が同一壁面に配設されており、赤外線発光素子 20から出力される光が手 21で反 射した光を赤外線受光素子 19が検出することで手の有無を検出するという反射型の 検出装置の構成が採用されている。
[0021] 手検出装置は、図 2に示すように、一組の赤外線発光素子 20および赤外線受光素 子 19で構成してもよいし、図 3に示すように複数組の赤外線発光素子 20および赤外 線受光素子 19で構成してもよぐ必要な検知範囲に応じて配設個数を決定する。
[0022] 赤外線受光素子 19の検出信号は、マイクロコンピュータを搭載した制御回路（図示 せず）に入力され、制御回路が赤外線受光素子 19での検出信号と所定の基準値と を比較し、検出値が基準値より大きければ、手が挿入されたと判断する。制御回路は 、手が挿入されたと判断した場合、高圧空気流発生装置 2に通電してエアーノズル 4 より高速空気流を吹出させ運転を開始し、手での反射が無くなって赤外線受光素子 19での検出信号が基準値以下となれば、運転を停止する。
[0023] ここで、図 1〜図 3に示すように、乾燥処理空間 6を形成する内壁面のうち、少なくと も手検出装置 8の赤外線発光素子 20に対向する部位には、赤外線の反射率が手よ りも小さくて赤外線を吸収する赤外線吸収部 10を設けている。この場合は、手検出 装置 8が乾燥処理空間 6を形成する内壁面のうち背面側の内壁面に設けられている ので、赤外線吸収部 10は正面側の内壁面に設けている。図 1の場合は、高さの異な る 2つの位置に赤外線吸収部 10が設けられている力 これら 2つの位置に対向する よう 2つの赤外線発光素子 20が配設されている。図 1の場合は、乾燥処理空間 6を形 成する内壁面のうち赤外線発光素子 20に対向する部位にのみ赤外線吸収部 10を 設けるようにしている力 乾燥処理空間 6の内壁面全てに赤外線吸収部 10を設ける ようにしてもよい。また、図 1の場合は、手検出装置 8が 1個と赤外線吸収部 10が 2個 で構成されているが、必要に応じて手検出装置を乾燥空間内に例えば上下方向に 複数個配置してあってもょ 、。
[0024] 赤外線吸収部 10は、赤外線に対する反射率が小さくて赤外線の吸収率が大きい ほど好ましぐ例えば黒色などの濃度の濃い色材を塗布するとか、あるいは表面が濃 い色の材料、材質を用いて形成する。
[0025] 上記構成において、手未挿入時には赤外線吸収部 10からの反射が少なぐ赤外 線受光素子 19にはほとんど赤外光が入力されない。手 21を乾燥処理空間 6内に挿 入した時には赤外線発光素子 20の反射光が手 21で反射して、赤外線受光素子 19 に入力され、制御回路に搭載されたマイクロコンピュータが手有りの状態を検出し、 運転を開始する。
[0026] ここで、使用者以外の人が本体周辺に近づいた場合、乾燥処理空間 6内の壁面に 赤外線吸収部 10がない場合では、赤外線発光素子 20の赤外光が乾燥処理空間 6 内で乱反射し、本体外部に出力され、その赤外光が人に反射し、赤外線受光素子 1 9に入力され、誤動作にいたる場合がある。また、前記誤動作を防ぐために、従来技 術のように、運転開始の基準値を高く設定した場合は反射光量を多く必要とするため 、手検出範囲が狭くなつてしまう。しかし、本実施の形態のように、赤外線発光素子 2 0と対向する乾燥処理空間 6内の壁面に赤外線吸収部 10を設けた場合は、外部へ 出力される光はほとんどなぐ運転する基準値を低い設定にすることができ、手検出 範囲を広くすることができる。
[0027] また従来の手検出方式には、赤外線発光素子、赤外線受光素子を乾燥処理空間 の壁面に対向して別々の位置に配置し、受光素子への光を遮断することで手の有無 を検出し、運転を開始する方式もある。この方式では、乾燥処理空間にのぞむ壁面 の本体正面側と背面側にそれぞれ手検出装置を備える必要がある。さらに、良好な 手検知を得るためには、ノズル周辺に手検出装置を配置する必要がある。前記の配 置を行った場合、第 1の問題として、運転開始の良好な検知位置を得るために、送風 路の一部を閉塞した位置に手検出装置を配置する必要があるため、送風路の圧力 損失が増加する。第 2の問題として、運転停止の良好な検知位置を得るためには、手 検出装置を本体正面側最上部に配置する必要があるため、手挿入位置が高くなり、 使い勝手が悪くなつてしまう。
[0028] このような課題も反射方式による手検出装置を採用することで、正面側又は背面側 のどちらか片方に手検出装置を集約できるので送風路周辺の構造が簡素化でき、コ スト低減になるとともに、送風路の圧力損失が改善される。また、手検出装置 8は、本 体正面側最上部 11に配置する必要なぐ図 1に示すように、乾燥処理空間 6の奥寄 りに配設することができ、使い勝手が向上する。また、図 3に示すように、赤外線受光 素子 19及び赤外線発光素子 20の個数を増やすことで、本体横幅が長くなつた場合 でも、手検出範囲を乾燥処理空間 6内とすることができる。
[0029] 前記反射式にお!、て、乾燥処理空間 6の正面側壁面と背面側壁面の距離が広 、 場合（150mm程度）は、手未挿入時の壁面による赤外線反射量と手挿入時の手に よる反射量の差が充分に得られるため、反射式の手検出装置を備えるだけでよいが 、上記壁面間の距離が狭い場合 (40〜： LOOmm程度）は、手未挿入時の壁面による 赤外線反射量と手挿入時の手による反射量の差が充分に得られないため、良好な 検知感度を得ることができな 、。
[0030] この問題は、前述したように、赤外線発光素子に対向する部位に手よりも反射率の 少ない赤外線吸収部 10を設けることにより、乾燥処理空間 6の距離が狭い手乾燥装 置でも良好な検知感度を得ることができる。
[0031] また、手挿入時の挿入感'使い勝手を良くするためには、正面側パネル 7と乾燥処 理空間 6の内壁面との間が薄い方が良ぐ手検出装置が正面側、背面側それぞれ配 置してある場合、正面側手検出装置により上記正面パネル 内壁面間が厚くなつて しまい挿入感'使い勝手を損ねるため、前記反射式の手検出装置 8と赤外線吸収部 を組合せた手検出方式を用いることにより、乾燥処理空間背面側に手検出装置を集 約することができ、良好な使 、勝手を得ることができる。
[0032] 図 4は実施の形態 1の手乾燥装置の変形例を示すもので、図 4では、手検出装置 8 を、乾燥処理空間 6の正面側の内壁面に配設している。この場合は、手検出装置 8を 乾燥処理空間 6の正面側の内壁面に配設しているので、赤外線吸収部 10は乾燥処 理空間 6を形成する内壁面のうち背面側の内壁面に設けている。
[0033] 実施の形態 2.
つぎに、図 5に従って実施の形態 2の手乾燥装置について説明する。この実施の形 態 2では、赤外線発光素子 20及び赤外線受光素子 19からなる手検出装置 8を乾燥 処理空間 6内の背面側に配置し、前記手検出装置 8の赤外線受光素子 19に対向し た正面側の位置に赤外線発光素子 9を設けており、乾燥処理空間 6における手挿入 部 3の近傍に挿入された手は、手検出装置 8に内蔵される赤外線発光素子 20及び 赤外線受光素子 19による反射型の構成によって検出し、乾燥処理空間 6の奥側に 挿入された手は赤外線発光素子 9と赤外線受光素子 19による透過型の構成によつ て検出している。赤外線受光素子 19で受光される赤外線発光素子 20および赤外線 発光素子 9からの赤外線 A, Bは、タイミング的な制御あるいは波長識別などを行うこ とにより適宜識別される。
[0034] この場合、手検出装置 8の赤外線発光素子 20および赤外線発光素子 9のうちのど ちらかの赤外線 A, Bを遮断することにより手を検出する方式であり、赤外線 Bの地点 まで手が挿入されると、制御回路に搭載されたマイクロコンピュータに信号が送信さ れ、高圧空気流発生装置 2が運転を開始する。また、赤外線 Aを手挿入部 3の近傍 に配しているので、手挿入部 3周辺に手がある場合でも運転が継続されるとともに、 手が無 ヽ場合は確実に運転を停止する。
[0035] このように実施の形態 2では、反射型の赤外線発光素子及び赤外線受光素子と、 透過型の赤外線発光素子及び赤外線受光素子との協働によって乾燥処理空間 6に 挿入された手を検出しており、反射型の赤外線発光素子に対向する部位には、前述 の赤外線吸収部 10が設けられている。
[0036] なお、図 5の場合は手検出装置 8の赤外線受光素子 19によって、赤外線発光素子 20, 9から発生される赤外線を共通に受光するようにしたが、赤外線発光素子 9から 発せられる赤外線を専用に受光する赤外線受光素子を乾燥処理空間 6内の背面側 に別に設けるようにしてもよい。さらに、手検出装置 8が設けられる壁面側（図 5の場 合は背面側）に、透過型検出を行うための専用の赤外線発光素子を設け、この専用 の赤外線発光素子に対し乾燥処理空間 6を挟んで対向する部位に（図 5の場合は正 面側）、該専用の赤外線発光素子からの赤外線を受光する赤外線受光素子を設け るようにしてちょい。
産業上の利用可能性
[0037] 以上のように、本発明に力かる手乾燥装置は、赤外線発光素子および赤外線受光 素子により挿入された手を検出する手検出装置を備えた手乾燥装置に有用である。

Claims

請求の範囲
[1] 高圧空気流を発生する高圧空気流発生装置と、
該高圧空気流発生装置により生成された高圧空気流を噴出するノズルと、 手を挿抜可能な手挿入部を有し、この手挿入部を介して挿入された手を前記ノズ ルから出射された高圧空気流で乾燥処理する乾燥処理空間が形成された乾燥処理 空間形成部と、
前記乾燥処理空間に挿入された手を検出するための赤外線発光素子および赤外 線受光素子が乾燥処理空間形成部の同一壁面に配設される 1〜複数の手検出装置 とを備え、
前記手検出装置の検出信号に基づいて前記高圧空気流発生装置を駆動制御す る手乾燥装置において、
前記乾燥空間形成部の壁面における少なくとも前記手検出装置の赤外線発光素 子に対向する部位に、赤外線の反射率が手よりも小さくて赤外線を吸収する赤外線 吸収部を形成したことを特徴とする手乾燥装置。
[2] 前記手検出装置を乾燥処理空間の背面側に集約したことを特徴とする請求項 1に 記載の手乾燥装置。
[3] 赤外線吸収部には、赤外線の反射率が手よりも大きい色または材料が用いられる ことを特徴とする請求項 1に記載の手乾燥装置。
[4] 赤外線吸収部には、赤外線の反射率が手よりも大きい色または材料が用いられる ことを特徴とする請求項 2に記載の手乾燥装置。
[5] 前記乾燥処理空間の正面側と背面側の距離は、 40〜： L OOmm程度であることを特 徴とする請求項 1に記載の手乾燥装置。
[6] 前記乾燥処理空間の正面側と背面側の距離は、 40〜： L 00mm程度であることを特 徴とする請求項 2に記載の手乾燥装置。
[7] 前記乾燥処理空間の正面側と背面側の距離は、 40〜： L 00mm程度であることを特 徴とする請求項 3に記載の手乾燥装置。
[8] 前記乾燥処理空間の正面側と背面側の距離は、 40〜： L 00mm程度であることを特 徴とする請求項 4に記載の手乾燥装置。 前記乾燥処理空間を挟んで対向する赤外線発光素子および Zまたは赤外線受光 素子を更に備え、該対向配置された赤外線発光素子および Zまたは赤外線受光素 子と前記手検出装置との協働によって乾燥処理空間に挿入された手を検出すること を特徴とする請求項 1に記載の手乾燥装置。
PCT/JP2005/013652 2005-07-26 2005-07-26 手乾燥装置 WO2007013142A1 (ja)

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TWI671050B (zh) * 2017-08-17 2019-09-11 日商三菱電機股份有限公司 烘手裝置
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US7971368B2 (en) 2011-07-05
TWI278300B (en) 2007-04-11
US20080263889A1 (en) 2008-10-30
JPWO2007013142A1 (ja) 2009-02-05
KR100909730B1 (ko) 2009-07-29
JP4105209B2 (ja) 2008-06-25
EP1908384A4 (en) 2010-03-17
TW200704387A (en) 2007-02-01
KR20070092992A (ko) 2007-09-14
EP1908384A1 (en) 2008-04-09

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