JP4607196B2 - Hand dryer - Google Patents

Hand dryer Download PDF

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JP4607196B2
JP4607196B2 JP2008015336A JP2008015336A JP4607196B2 JP 4607196 B2 JP4607196 B2 JP 4607196B2 JP 2008015336 A JP2008015336 A JP 2008015336A JP 2008015336 A JP2008015336 A JP 2008015336A JP 4607196 B2 JP4607196 B2 JP 4607196B2
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hand
infrared light
light emitting
drying
air nozzle
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JP2008110240A (en
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繕弘 深谷
俊一 森
康之 糸魚川
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Mitsubishi Electric Corp
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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。   The present invention relates to a hand drying device for hygienically drying wet hands after washing, and more particularly to a hand drying device capable of preventing a malfunction when a person approaches, with high accuracy. is there.

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。   As a device for drying wet hands after washing, there is a hand drying device that blows off water droplets adhering to the hands by a high-speed air flow to dry them. In this apparatus, a box is provided with a hand insertion part as a processing space in a concave shape, and an air nozzle is provided in the hand insertion part. The air nozzle is connected to an air duct connected to a high-pressure airflow generator so as to eject a high-speed airflow into the manual insertion portion. The water blown into the hand drying processing space in accordance with 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.

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。   In such a hand drying device, 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 this hand detection device detects insertion of a hand into the hand drying processing space. In many cases, a high-speed air flow is ejected based on the detection signal.

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。   As an arrangement method of the infrared light emitting element and the infrared light receiving element, the infrared light emitting element and the infrared light receiving element are arranged so as to face, for example, the front side wall surface and the rear side wall surface forming the hand drying processing space, There is a transmission type detection method that detects the presence or absence of hands by blocking light, but this transmission type detection method complicates the structure of the main body by arranging infrared light emitting elements and light receiving elements at different positions. Therefore, there is a problem that the pressure loss of the air passage increases and the cost of the main body increases.

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いても誤動作しないようにしている。   Patent Document 1 discloses an infrared light emitting element for detecting a hand inserted in a hand drying processing space, and a reflected light detection type hand detecting device in which an infrared light receiving element is disposed on the same wall surface. In Patent Document 1, an infrared light emitting element and an infrared light receiving element disposed on the same wall are tilted so as to be aimed at the lower inner side of the air outlet, thereby limiting the hand detection range. This prevents malfunctions even if other people approach the vicinity of the main body.

特開平１１−３１８７６０号公報Japanese Patent Laid-Open No. 11-318760

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から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。   However, in the conventional hand-drying apparatus disclosed in Patent Document 1, no particular consideration is given to infrared reflection on the wall surface forming the drying treatment space, so that the wall surface forming the drying treatment space is diffusely reflected to the outside from the main body. When the infrared rays that come out increase and a person other than the user approaches the vicinity of the main body, there is a high possibility that a malfunction occurs in which the light receiving unit detects and starts the operation.

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ってしまう。   Further, in Patent Document 1, in order to eliminate a malfunction when a person approaches the vicinity of the main body, the reference value for comparing the received light intensity when the hand is inserted is set higher than that when the person approaches the vicinity of the main body. However, increasing the reference value for comparing the received light intensity narrows the hand detection range.

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。   The present invention has been made in view of the above, and is a hand dryer that 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.

上述した課題を解決し、目的を達成するために、本発明は、正面側の壁と背面側の壁との間に乾燥処理空間を有する本体と、前記正面側の壁に設けられた正面側エアーノズルと、前記背面側の壁に設けられた背面側エアーノズルと、前記本体内部に設けられ、前記正面側エアーノズル及び前記背面側エアーノズルと送風路を介して連通する高圧空気流発生装置と、前記乾燥処理空間に面する壁に設けられた手検出装置と、前記手検出装置からの信号に基づいて前記高圧空気流発生装置に信号を送出する制御回路とを備える手乾燥装置において、前記手検出装置は、前記背面側の壁に設けられた複数の反射型用の赤外線発光素子と、前記背面側の壁に設けられ、前記複数の反射型用の赤外線発光素子のうちの一部の反射型用の赤外線発光素子から前記正面側エアーノズル近傍に向かって照射される赤外線の反射光と、前記複数の反射型用の赤外線発光素子のうちの他の反射型用の赤外線発光素子から前記正面側エアーノズルよりも前記乾燥処理空間の奥側に向かって照射される赤外線の反射光とを受光する赤外線受光素子とからなることを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention provides a main body having a drying treatment space between a front-side wall and a back-side wall, and a front side provided on the front-side wall. An air nozzle, a back-side air nozzle provided on the back-side wall, and a high-pressure airflow generator provided inside the main body and communicating with the front-side air nozzle and the back-side air nozzle via a ventilation path And a hand dryer provided on a wall facing the drying treatment space, and a control circuit for sending a signal to the high-pressure airflow generator based on a signal from the hand detector, The hand detection device includes a plurality of reflective infrared light emitting elements provided on the back wall and a part of the plurality of reflective infrared light emitting elements provided on the back wall. Infrared light emitting device for reflective type Infrared reflected light radiated toward the vicinity of the front side air nozzle and the other side of the plurality of reflective type infrared light emitting elements from the reflective side infrared light emitting element, the dry air more than the front side air nozzle. It is characterized by comprising an infrared light receiving element that receives infrared reflected light irradiated toward the inner side of the processing space.

この発明によれば、手検出装置を、背面側の壁に設けられた複数の反射型用の赤外線発光素子と、背面側の壁に設けられ、複数の反射型用の赤外線発光素子のうちの一部の反射型用の赤外線発光素子から正面側エアーノズル近傍に向かって照射される赤外線の反射光と、複数の反射型用の赤外線発光素子のうちの他の反射型用の赤外線発光素子から正面側エアーノズルよりも前記乾燥処理空間の奥側に向かって照射される赤外線の反射光とを受光する赤外線受光素子とから構成することで、高さの異なる２つの位置で手を検出するとともに、背面側のみに手検出装置を集約するようにしている。このため、確実に手の検出を行い、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、手検出装置は、乾燥処理空間の奥寄りに配設することができ、使い勝手が向上する。   According to the present invention, the hand detection device includes a plurality of reflective infrared light emitting elements provided on the back side wall and a plurality of reflective infrared light emitting elements provided on the back side wall. From the reflected infrared light emitted from some reflective infrared light emitting elements toward the vicinity of the front side air nozzle, and from the other reflective infrared light emitting elements among the multiple reflective infrared light emitting elements While comprising an infrared light receiving element that receives infrared reflected light emitted toward the back side of the drying processing space from the front side air nozzle, the hand is detected at two different positions. The hand detection devices are concentrated only on the back side. For this reason, hand detection can be performed reliably, the structure around the air passage can be simplified, the cost can be reduced, and the pressure loss of the air passage can be improved. In addition, the hand detection device can be disposed at the back of the drying processing space, improving usability.

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。   Hereinafter, an embodiment of a hand dryer according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

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。 Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a right side cross-sectional view of the hand drying apparatus according to the first embodiment, and FIGS. 2 and 3 are plan views showing portions related to the hand detection apparatus.

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。   As shown in FIG. 1, this hand-drying apparatus has a main body box 1 composed of a base 5 forming a back outer shell and a front panel 7 forming a front outer shell. A concave space that functions as the hand insertion portion 3 and the drying processing space 6 is formed on the upper side of the main body box 1. The concave space has an open sink shape in which both side surfaces are open and a hand can be inserted and removed.

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１４に溜めるようになっている。   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 passes through the air passage 16 and the front side wall surface in the vicinity of the manual insertion portion 3. And it is led to the air nozzle 4 provided on the back side wall surface. A high-speed air flow is jetted from these air nozzles 4 into the hand insertion portion 3 to blow off water adhering to the hand placed in the hand insertion portion 3 into the drying treatment space 6, and the blown water is inclined to the bottom of the concave space. It collects in the water receiving part with, and the collected water is stored in the drain container 14 through the drain port 12 at the lower end of the slope.

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樹脂などで作られ、中性洗剤及びアルコール等を使って洗浄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。   A drain pipe 13 for carrying water is connected to the drain port 12. The drain container 14 having an open container structure for storing water carried by the drain pipe 13 is provided so as to be removable by inserting and removing in the front-rear direction. 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 resin, and can be cleaned and cleaned using a neutral detergent, alcohol, or the like. Further, 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, thereby reducing the adhesion of dirt to the surface. And bacterial growth is reduced.

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いる。   The high-pressure airflow generator 2 includes a DC brushless motor (which may be a normal commutator motor or an induction motor), a drive circuit that drives the DC brushless motor, and a turbo fan that is rotated by the DC brushless motor. In this form, it is attached directly below the hand insertion portion 3. Reference numeral 17 denotes an air inlet of the blower, and 18 denotes an air inlet provided below the box 1. The air inlet 18 can suck air through a detachable air filter 15.

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１９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。   A hand detection device 8 is provided on the back side of the wall surface forming the drying processing space 6. The hand detection device 8 is inserted into the drying processing space 6 via the hand insertion unit 3 based on the detection signal of the hand detection device 8. Detect the presence of hands. 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 water droplets. And a cover (not shown) that can prevent the intrusion and the like and transmit infrared signals. As shown in FIG. 2 or FIG. 3, the hand detection device 8 includes one or more sets of infrared light emitting elements 20 and infrared light receiving elements 19 disposed on the same wall surface, and is output from the infrared light emitting elements 20. A configuration of a reflection type detection device is employed in which the infrared light receiving element 19 detects the light reflected by the hand 21 to detect the presence or absence of the hand.

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で構成してもよく、必要な検知範囲に応じて配設個数を決定する。   As shown in FIG. 2, 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 infrared light receiving elements 19 as shown in FIG. The arrangement number may be determined according to a necessary detection range.

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。   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, and the detection value is the reference. If it is greater than the value, it is determined that a hand has been inserted. When the control circuit determines that a hand has been inserted, the high-pressure airflow generator 2 is energized to blow a high-speed airflow from the air nozzle 4 and start operation. If the detection signal becomes lower than the reference value, the operation is stopped.

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が設けられているが、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が、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よい。   Here, as shown in FIGS. 1 to 3, at least a portion of the inner wall surface forming the drying treatment space 6 that faces the infrared light emitting element 20 of the hand detection device 8 has an infrared reflectance higher than that of the hand. An infrared absorbing portion 10 that is small and absorbs infrared rays is provided. In this case, since the hand detection device 8 is provided on the inner wall surface on the back side among the inner wall surfaces that form the drying treatment space 6, the infrared absorbing section 10 is provided on the inner wall surface on the front side. In the case of FIG. 1, the infrared absorbing portions 10 are provided at two positions having different heights, but two infrared light emitting elements 20 are disposed so as to face these two positions. In the case of FIG. 1, the infrared absorbing part 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. The part 10 may be provided. In the case of FIG. 1, the hand detection device 8 and the infrared absorption unit 10 are each composed of one, but if necessary, a plurality of hand detection devices are arranged in the drying space, for example, in the vertical direction. May be.

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く、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。   The infrared absorbing portion 10 is preferably as having a low reflectance with respect to infrared rays and a high infrared absorption rate. For example, the infrared absorbing portion 10 is formed by applying a dark color material such as black or using a dark surface material or material. .

上記構成において、手未挿入時には赤外線吸収部１０からの反射が少なく、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。   In the above-described configuration, when the hand is not inserted, there is little reflection from the infrared absorbing unit 10 and almost no infrared light is input to the infrared light receiving element 19. When the hand 21 is inserted into the drying processing space 6, the reflected light of the infrared light emitting element 20 is reflected by the hand 21 and is input to the infrared light receiving element 19, and the microcomputer mounted on the control circuit detects the presence of the hand. And start driving.

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１９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ってしまう。しかし、本実施の形態のように、赤外線発光素子２０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く、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。   Here, when a person other than the user approaches the periphery of the main body, the infrared light of the infrared light emitting element 20 is irregularly reflected in the drying processing space 6 when the wall surface in the drying processing space 6 is not provided with the infrared absorbing portion 10. In some cases, the infrared light is output to the outside of the main body, the infrared light is reflected on a person, and is input to the infrared light receiving element 19, resulting in malfunction. In order to prevent the malfunction, when the reference value for starting operation is set high as in the prior art, a large amount of reflected light is required, and the hand detection range becomes narrow. However, when the infrared absorbing portion 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, there is almost no light output to the outside, and the reference value for driving is set. The setting can be made low, and the hand detection range can be widened.

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、使い勝手が悪くなってしまう。   In addition, in the conventional hand detection method, an infrared light emitting element and an infrared light receiving element are arranged at different positions facing the wall surface of the drying processing space, and the presence or absence of a hand is detected by blocking light to the light receiving element, There is also a method of starting operation. In this system, it is necessary to provide a hand detection device on the front side and the back side of the main body of the wall surface in the drying treatment space. Furthermore, in order to obtain good hand detection, it is necessary to arrange a hand detection device around the nozzle. When the above arrangement is performed, as a first problem, in order to obtain a good detection position at the start of operation, it is necessary to arrange a hand detection device at a position where a part of the air passage is closed, Pressure loss increases. As a second problem, in order to obtain a good detection position of operation stop, it is necessary to arrange the hand detection device at the uppermost part on the front side of the main body, so that the hand insertion position becomes high and the usability deteriorates.

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に配置する必要なく、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、本体横幅が長くなった場合でも、手検出範囲を乾燥処理空間６内とすることができる。   By adopting a reflection type hand detection device, it is possible to consolidate the hand detection device on either the front side or the back side, so that the structure around the air passage can be simplified and the cost can be reduced. The pressure loss in the air passage is improved. Further, the hand detection device 8 does not need to be disposed at the uppermost part 11 on the front side of the main body, and can be disposed at the back of the drying processing space 6 as shown in FIG. 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 processing space 6 even when the main body width is increased.

前記反射式において、乾燥処理空間６の正面側壁面と背面側壁面の距離が広い場合（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（４０〜１００ｍｍ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い。   In the reflection type, when 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), there is a difference between the amount of infrared reflection by the wall surface when the hand is not inserted and the amount of reflection by the hand when the hand is inserted. In order to obtain sufficient, it is only necessary to provide a reflection type hand detection device, but when the distance between the wall surfaces is narrow (about 40 to 100 mm), the amount of infrared reflection by the wall surface when the hand is not inserted and Since the difference in reflection amount by hand cannot be obtained sufficiently, good detection sensitivity cannot be obtained.

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。   As described above, the problem is that, by providing the infrared absorbing portion 10 having a reflectance lower than that of the hand at a portion facing the infrared light emitting element, a good detection sensitivity can be obtained even with a hand drying apparatus having a short distance of the drying processing space 6. Obtainable.

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く、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−内壁面間が厚くなってしまい挿入感・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、良好な使い勝手を得ることができる。   In addition, in order to improve the insertion feeling and usability during manual insertion, it is better that the space between the front panel 7 and the inner wall surface of the drying processing space 6 is thin, and the hand detection device is arranged on each of the front side and the back side. In this case, the front-side hand detection device thickens the space between the front panel and the inner wall surface and impairs the feeling of insertion and usability. Therefore, a hand detection method in which the reflection-type hand detection device 8 and the infrared absorption unit are combined is used. Thus, the hand detection devices can be integrated on the back side of the drying processing space, and good usability can be obtained.

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。   FIG. 4 shows a modification of the hand drying device of the first embodiment. In FIG. 4, the hand detection device 8 is disposed on the inner wall surface on the front side of the drying processing space 6. In this case, since the hand detection device 8 is disposed on the inner wall surface on the front side of the drying processing space 6, the infrared absorbing unit 10 is provided on the inner wall surface on the back side among the inner wall surfaces forming the drying processing space 6. ing.

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って検出している。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。 Embodiment 2. FIG.
Next, the hand dryer according to the second embodiment will be described with reference to FIG. In the second embodiment, the hand detection device 8 including the infrared light emitting element 20 and the infrared light receiving element 19 is disposed on the back side in the drying processing space 6, and the front side of the hand detection device 8 facing the infrared light receiving element 19. The hand inserted in the vicinity of the hand insertion part 3 in the drying processing space 6 is reflected by the infrared light emitting element 20 and the infrared light receiving element 19 incorporated in the hand detecting device 8. The hand inserted in the back side of the drying processing space 6 is detected by the transmission type structure by the infrared light emitting element 9 and the infrared light receiving element 19. The infrared rays A and B from the infrared ray emitting element 20 and the infrared ray emitting element 9 received by the infrared ray receiving element 19 are appropriately identified by performing timing control or wavelength identification.

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、手が無い場合は確実に運転を停止する。   In this case, the hand is detected by blocking the infrared rays A and B of either the infrared light emitting element 20 or the infrared light emitting element 9 of the hand detecting device 8, and the hand is inserted up to the point of the infrared ray B. Then, a signal is transmitted to the microcomputer mounted on the control circuit, and the high-pressure airflow generator 2 starts operation. Moreover, since the infrared rays A are arranged in the vicinity of the hand insertion portion 3, the operation is continued even when there is a hand around the hand insertion portion 3, and the operation is surely stopped when there is no hand.

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。   As described above, in the second embodiment, 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.

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もよい。   In the case of FIG. 5, the infrared light received from the infrared light emitting elements 20 and 9 is commonly received by the infrared light receiving element 19 of the hand detection device 8, but the infrared light emitted from the infrared light emitting element 9 is exclusively used. An infrared light receiving element for receiving light may be separately provided on the back side in the drying processing space 6. Further, a dedicated infrared light emitting element for performing transmission detection is provided on the wall surface side (in the case of FIG. 5) where the hand detection device 8 is provided, and the drying processing space 6 is provided for this dedicated infrared light emitting element. An infrared light receiving element that receives infrared light from the dedicated infrared light emitting element may be provided at a portion that is sandwiched and opposed (front side in the case of FIG. 5).

以上のように、本発明にかかる手乾燥装置は、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。   As described above, the hand drying device according to the present invention is useful for a hand drying device including an infrared light emitting element and a hand detection device that detects a hand inserted by the infrared light receiving element.

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。FIG. 3 is a right side cross-sectional view showing the hand drying device in the first embodiment. 実施の形態１における手検出装置の概略図である。1 is a schematic diagram of a hand detection device according to Embodiment 1. FIG. 実施の形態１における手検出装置の概略図である。1 is a schematic diagram of a hand detection device according to Embodiment 1. FIG. 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。It is right side sectional drawing which shows the modification of the hand-drying apparatus in Embodiment 1. 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。It is right side sectional drawing which shows the hand-drying apparatus in Embodiment 2.

符号の説明Explanation of symbols

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 正面パネル
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 エアーフィルタ
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 DESCRIPTION OF SYMBOLS 1 Main body box 2 High pressure airflow generator 3 Hand insertion part 4 Air nozzle 5 Base 6 Drying processing space 7 Front panel 8 Hand detection apparatus 9 Infrared light emitting element 10 Infrared absorption part 12 Drain outlet 13 Drain pipe 14 Drain container 15 Air filter 16 Air passage 18 Air intake 19 Infrared light receiving element 20 Infrared light emitting element 21 Hand

Claims (5)

正面側の壁と背面側の壁との間に上方に開口した乾燥処理空間を有する本体と、前記正面側の壁に設けられた正面側エアーノズルと、前記背面側の壁に設けられた背面側エアーノズルと、前記本体内部に設けられ、前記正面側エアーノズル及び前記背面側エアーノズルと送風路を介して連通する高圧空気流発生装置と、前記乾燥処理空間に面する壁に設けられた手検出装置と、前記手検出装置からの信号に基づいて前記高圧空気流発生装置に信号を送出する制御回路とを備える手乾燥装置において、
前記手検出装置は、前記背面側の壁に設けられた複数の反射型用の赤外線発光素子と、前記背面側の壁に設けられ、前記複数の反射型用の赤外線発光素子のうちの一部の反射型用の赤外線発光素子から前記正面側エアーノズル近傍に向かって照射される赤外線の反射光と、前記複数の反射型用の赤外線発光素子のうちの他の反射型用の赤外線発光素子から前記正面側エアーノズルよりも前記乾燥処理空間の奥側に向かって照射される赤外線の反射光とを受光する赤外線受光素子とからなることを特徴とする手乾燥装置。 A main body having a drying treatment space opened upward between a front side wall and a back side wall, a front side air nozzle provided on the front side wall, and a back side provided on the back side wall A side air nozzle, a high-pressure air flow generator provided inside the main body and communicating with the front side air nozzle and the back side air nozzle via an air passage, and a wall facing the drying treatment space. In a hand dryer comprising a hand detection device and a control circuit for sending a signal to the high-pressure airflow generator based on a signal from the hand detection device,
The hand detection device includes a plurality of reflective infrared light emitting elements provided on the back wall and a part of the plurality of reflective infrared light emitting elements provided on the back wall. The reflected infrared light emitted from the reflective infrared light emitting element toward the vicinity of the front-side air nozzle and the other reflective infrared light emitting elements among the plurality of reflective infrared light emitting elements A hand-drying device comprising: an infrared light receiving element that receives reflected infrared light that is irradiated toward the back side of the drying processing space from the front-side air nozzle. 前記乾燥空間は、凹状であることを特徴とする請求項１に記載の手乾燥装置。The hand drying apparatus according to claim 1, wherein the drying space is concave. 正面側エアーノズル近傍に赤外線吸収部を設けることを特徴とする請求項１乃至２の何れか一つに記載の手乾燥装置。 Hand drying apparatus according to any one of claims 1 to 2, characterized in that provision of the infrared absorption portion in the vicinity of the front side air nozzle. 赤外線吸収部は少なくとも手の赤外線反射率よりも低い反射率を有する物質からなることを特徴とする請求項３記載の手乾燥装置。 4. The hand dryer according to claim 3, wherein the infrared absorbing portion is made of a material having a reflectance lower than at least the infrared reflectance of the hand. 正面側の壁と背面側の壁との間隔が４０ｍｍ以上１００ｍｍ以下であることを特徴とする請求項４記載の手乾燥装置。 The hand dryer according to claim 4 , wherein a distance between the front wall and the rear wall is 40 mm or more and 100 mm or less.
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