JP6044879B2 - Hand dryer - Google Patents

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JP6044879B2
JP6044879B2 JP2009186867A JP2009186867A JP6044879B2 JP 6044879 B2 JP6044879 B2 JP 6044879B2 JP 2009186867 A JP2009186867 A JP 2009186867A JP 2009186867 A JP2009186867 A JP 2009186867A JP 6044879 B2 JP6044879 B2 JP 6044879B2
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nozzle
air
motor fan
hand dryer
palm
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JP2011024962A (en
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芳三 津崎
芳三 津崎
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芳三 津崎
芳三 津崎
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Description

本発明は手の平に付着した水を、高速の空気で吹き飛ばす方式の手乾燥機の改良に関する。The present invention relates to an improvement of a hand dryer that blows off water adhering to the palm with high-speed air.

一般に、手の平に付着した大粒の水滴は、100m/秒以下の風でも吹き飛ばせる。現行装置のカタログ記載の「脱水時間5−9秒」は、この時間、即ち、約85%の水分の脱水に必要な時間である。一方、手の平の皺の間に沁み込んだ約15%の水分を急速に脱水するには、100m/秒以上の風速が必要である。しかし現行装置の風速は、この値に達しないので、大量の温風で、温風乾燥が行われる。In general, large water droplets adhering to the palm can be blown away even with a wind of 100 m / sec or less. The “dehydration time 5-9 seconds” described in the catalog of the current apparatus is this time, that is, the time necessary for dehydration of about 85% of water. On the other hand, a wind speed of 100 m / sec or more is required to rapidly dehydrate about 15% of the water swallowed between palms. However, since the wind speed of the current apparatus does not reach this value, hot air drying is performed with a large amount of hot air.

これまで、装置の低電力化、低価格化、周囲へ撒き散らされる水分の低減などの要求はあるが、現行装置は依然、業務用であり、一般家庭には普及していない。Until now, there has been a demand for lower power consumption, lower cost, and reduction of moisture scattered around the device, but current devices are still for business use and are not popular in ordinary households.

特開2004−081878号公報 図1Japanese Patent Laid-Open No. 2004-081878 FIG. 特開平10−290767号公報 図1Japanese Patent Laid-Open No. 10-290767 FIG.

「松下エコ:ハンドドライヤ」「三菱電機:ジェットタオル」"Matsushita Eco: Hand Dryer" "Mitsubishi Electric: Jet Towel"

図4は現行の手乾燥機の内部構造を示す断面図である。外気はノズル21の水平面以下の位置から吸込まれて、水分濾過フィルタ25を通過し、ファン吸入口26へ入り、モータファン23で圧縮される。圧縮された空気はノズル内部に組み込まれた約300Wの加熱素子22で暖められ、外部へ噴出される。FIG. 4 is a cross-sectional view showing the internal structure of the current hand dryer. Outside air is sucked from a position below the horizontal plane of the nozzle 21, passes through the moisture filter 25, enters the fan inlet 26, and is compressed by the motor fan 23. The compressed air is warmed by the heating element 22 of about 300 W incorporated in the nozzle, and is ejected to the outside.

すなわち、現装置(図4)では、手の平の想定位置での風速は100m/秒以下なので、手の平の皺の間に残留する水分を急速には脱水できない。これを補完するために、ノズル内部に組み込まれた、約300Wの発熱素子22が発生する温風により脱水が促進される。また外気はノズル21の水平面以下の位置から取り込まれるので、脱水された水分の一部が装置内部に吸込まれる。この水分を除去するために、空気通路には水分濾過フィルタ25が組み込まれる。That is, in the current apparatus (FIG. 4), the wind speed at the assumed position of the palm is 100 m / second or less, so that moisture remaining between the palms of the palm cannot be rapidly dehydrated. In order to compensate for this, dehydration is promoted by the warm air generated by the heating element 22 of about 300 W incorporated in the nozzle. Moreover, since external air is taken in from the position below the horizontal surface of the nozzle 21, a part of the dehydrated water is sucked into the apparatus. In order to remove this moisture, a moisture filtration filter 25 is incorporated in the air passage.

また、現行装置(図4)のカバ28はノズル21を大きく覆っているので、見通しが悪く、手の平の想定位置はノズル21から、相当離れた位置に設定されている。これを補償するために、より消費電力の大きなモータファン23で大量の空気が、手の平に当てられる。Further, since the cover 28 of the current device (FIG. 4) covers the nozzle 21 greatly, the prospect is poor, and the assumed position of the palm is set at a position considerably away from the nozzle 21. In order to compensate for this, a large amount of air is applied to the palm of the motor fan 23 with higher power consumption.

即ち、現行装置(図4)は、手の平のやや広い部分に大量の温風を送ることにより脱水する方法なので、モータファン23の消費電力は約800Wと大きい。風量が多いので、脱水された水分の一部は、周囲に撒き散らされる。このように、現行装置(図4)は業務用であり、一般家庭には普及していない。That is, since the current device (FIG. 4) is a method of dehydrating by sending a large amount of warm air to a slightly wide part of the palm, the power consumption of the motor fan 23 is as large as about 800W. Since the air volume is large, a part of the dehydrated water is scattered around. Thus, the current device (FIG. 4) is for business use and is not widespread in ordinary households.

なお、現行装置図4のノズル21の形状は、左右方向に、ほぼ水平であるため、空気流の水平断面の形状は幅を持った直線状である。この場合、手から脱水された水の一部が、左右に飛び散るのを防止出来ない。Since the shape of the nozzle 21 of the current device FIG. 4 is substantially horizontal in the left-right direction, the shape of the horizontal cross section of the air flow is a straight line having a width. In this case, a part of the water dehydrated from the hand cannot be prevented from splashing to the left and right.

本発明は、加熱素子、水分濾過フィルタを使わず、手の想定位置をノズルに接近させることにより、モータファンの消費電力を低下させて、構造を合理化、簡単化して、一般家庭でも使用可能な安価な装置を、提供することを目的とする。The present invention reduces the power consumption of the motor fan by making the assumed position of the hand close to the nozzle without using a heating element and a moisture filtration filter, thereby streamlining and simplifying the structure, and can also be used in ordinary homes. An object is to provide an inexpensive apparatus.

本発明装置(図1)では、外径が約160mmの二個の円柱に形成された凹凸一組の斜面で圧力室10が構成されており、この一部が切り欠かれてノズル1が形成されている。すなわち、モータファン3収納容器の外壁に、約8度の凸斜面8が形成され、この対向面に、外周の一部がノズル1用に切欠かれた、約15度の凹斜面9を持つ蓋(図2)が固定されている。In the device of the present invention (FIG. 1), the pressure chamber 10 is constituted by a set of concave and convex slopes formed on two cylinders having an outer diameter of about 160 mm, and a part of the pressure chamber 10 is cut away to form the nozzle 1. Has been. That is, a convex slope 8 of about 8 degrees is formed on the outer wall of the motor fan 3 storage container, and a lid having a concave slope 9 of about 15 degrees, a part of the outer periphery of which is cut out for the nozzle 1 on the opposite surface. (FIG. 2) is fixed.

蓋(図2)の形状は、両端13a、13b間の水平距離は約130mm、凹凸の間隔はノズルの出口で約2mm、斜面の長さは約30mmである。即ち、ノズル1からは良く絞られ、減衰の少ない100m/秒以上の空気流が噴出される。The shape of the lid (FIG. 2) is such that the horizontal distance between both ends 13a and 13b is about 130 mm, the unevenness is about 2 mm at the nozzle outlet, and the slope length is about 30 mm. In other words, an air flow of 100 m / second or more that is well squeezed from the nozzle 1 and less attenuated is ejected.

ノズル1の凹凸斜面9,8は全周にわたって作られているので、この空間が圧力室(アキュームレータ)10の役割をして、モータファン3からの空気圧を安定化させる。従って、ノズル1から噴出される空気流は安定で、乱流の発生は防止されている。Since the uneven slopes 9 and 8 of the nozzle 1 are formed over the entire circumference, this space serves as a pressure chamber (accumulator) 10 to stabilize the air pressure from the motor fan 3. Therefore, the air flow ejected from the nozzle 1 is stable and the generation of turbulent flow is prevented.

本発明装置(図1)では、ノズル1からより高速の空気を噴出させるために、風量は少ないが、より高い風圧を発生出来る二枚羽根を持つターボファンなどのモータファン3が採用される。また、この整流子モータの巻線の線径はやや細く、鉄心には熱間圧延珪素鋼板が使用される。これらは電気的損失が多少多いが、製造原価が安いうえ、次に述べる温風の発生や、突入電流抑制の効果がある。In the device of the present invention (FIG. 1), a motor fan 3 such as a turbofan having two blades that can generate a higher wind pressure is employed in order to eject air at a higher speed from the nozzle 1. Further, the wire diameter of the commutator motor winding is slightly narrow, and a hot rolled silicon steel sheet is used for the iron core. These have a little electrical loss, but are low in manufacturing cost and have the effect of generating hot air and suppressing inrush current as described below.

一般に、この種装置では装置内を流通する空気で、モータファン3の巻線や鉄心が空冷される。本発明装置(図1)では、流通する空気の流量は少ないので、ノズル1から出る空気流の温度は、これらの損失熱を吸収して、室温より約15℃上昇している。即ち、加熱素子22が無くても、必要な温風が得られる。In general, in this type of device, the winding and the iron core of the motor fan 3 are air-cooled by the air flowing through the device. In the device of the present invention (FIG. 1), since the flow rate of the circulating air is small, the temperature of the air flow coming out of the nozzle 1 absorbs these lost heat and rises by about 15 ° C. from the room temperature. In other words, the necessary warm air can be obtained without the heating element 22.

本発明装置(図1)では、カバ12はノズル前方に位置する部分が大きく切り欠かれており、外気取入口2は、このカバ12と蓋図2との間の空間に形成されている。この外気取入口2は、ノズル1の前方に位置するので、手の平から脱水された水分は装置内部には取り込まれない。従って、現行装置図(4)に組み込まれている空気抵抗の大きな水分濾過フィルタ25は不要である。In the device of the present invention (FIG. 1), the cover 12 is largely cut away at the portion located in front of the nozzle, and the outside air inlet 2 is formed in the space between the cover 12 and the lid view 2. Since the outside air inlet 2 is located in front of the nozzle 1, moisture dehydrated from the palm is not taken into the apparatus. Therefore, the moisture filtration filter 25 having a large air resistance incorporated in the current device diagram (4) is not necessary.

本発明装置(図1)では、カバ12はノズル1の上部で、外気取込口2として、大きく切り欠かれているので、見通しが良く、手の平を自然な形で、円柱の一部に作られたノズル1を囲む形で接近させる事が出来る。すなわち、手の平全体はノズル1と同心円状に配置されるので、手の平全体の想定位置はノズル1により近く、空気流の減速が、より少ない位置で脱水が行われる。なお、手の甲側は油脂質なので、ここに付着した水分は、ノズル1から多少離れていても、容易に脱水される。In the device of the present invention (FIG. 1), the cover 12 is largely cut out as the outside air inlet 2 at the upper part of the nozzle 1, so that the line of sight is good and the palm is formed in a part of a cylinder in a natural shape. It can be made to approach in the form surrounding the nozzle 1 formed. That is, since the entire palm is arranged concentrically with the nozzle 1, the assumed position of the entire palm is closer to the nozzle 1, and the air flow is decelerated and dehydration is performed at a smaller position. In addition, since the back side of the hand is an oil lipid, the water adhering to it is easily dehydrated even if it is slightly away from the nozzle 1.

上記のように、本発明装置(図1)では、現行装置(図4)の加熱素子22および水分濾過フィルタ25は不要、手の平の想定位置はノズル1により近いので、モータファンの消費電力は約400W以下と半減されている。この場合、例えばモータの突入電流抑制回路は省略できる。即ち、本発明装置(図1)の消費電力は半減されているので、突入電流も少ない上、モータ巻線は細く設定されているので、電気抵抗が大きく、鉄心はB−H曲線が緩やかな熱間圧延珪素鋼板が使用されている。これらは突入電流抑制に効果がある。このように、本発明装置では制御回路の一部は省略され、あるいは小型化されるので、外気取込口2から、モータファン吸入口6に至る空間に、空気通路のスペースが確保された。As described above, in the device of the present invention (FIG. 1), the heating element 22 and the moisture filtration filter 25 of the current device (FIG. 4) are unnecessary, and the assumed position of the palm is closer to the nozzle 1, so the power consumption of the motor fan is about It is halved to 400W or less. In this case, for example, a motor inrush current suppression circuit can be omitted. That is, since the power consumption of the device of the present invention (FIG. 1) is halved, the inrush current is small, the motor winding is set thin, the electric resistance is large, and the iron core has a gradual BH curve. Hot rolled silicon steel sheets are used. These are effective in suppressing inrush current. Thus, in the device of the present invention, a part of the control circuit is omitted or miniaturized, so that a space for the air passage is secured in the space from the outside air intake port 2 to the motor fan intake port 6.

次に、外気取入口2から取り込まれた空気を、装置吸入口4に導くために、図3に示すように、ファンモータ3を収納する容器の両側面にリブ16a、16bが取り付けられている。これにより外気取入口2以外からの空気は遮断される。従って、水分を含まない空気だけが、装置内部に吸込まれる。Next, in order to guide the air taken in from the outside air inlet 2 to the device inlet 4, ribs 16a and 16b are attached to both side surfaces of the container that houses the fan motor 3, as shown in FIG. . As a result, air from other than the outside air intake 2 is blocked. Therefore, only air that does not contain moisture is sucked into the apparatus.

本発明装置(図1)ではノズル1の外周は円筒状で、蓋(図2)の凹斜面9の傾斜は約15度である。この場合、ノズル1を出た空気流の水平断面の形状は、例えば、拡げた傘の張り紙の一部のような形で噴出されるので、空気流は、手の平から脱水された水滴を囲むようにして下方へ流れる。従って、装置の両側方向に散らされる水滴は少ない。これはまた、装置の横幅を小さくすることが出来ることを意味する。In the device of the present invention (FIG. 1), the outer periphery of the nozzle 1 is cylindrical, and the inclination of the concave slope 9 of the lid (FIG. 2) is about 15 degrees. In this case, the shape of the horizontal cross section of the air flow exiting the nozzle 1 is ejected, for example, in the form of a part of an expanded umbrella paper, so that the air flow surrounds the water droplets dehydrated from the palm. Flows downward. Therefore, few water droplets are scattered on both sides of the apparatus. This also means that the lateral width of the device can be reduced.

なお極寒地などでの使用のためには、本発明による装置図1のモータファン吸込口6の周辺に、平板状発熱素子15を貼り付けることが出来る。この平板状発熱素子15の表面積は広いため、現行装置(図4)のノズル21内部に組込まれたPTCなどの発熱素子22のように、高温にする必要は無く、安全性が高いうえ、ノズル1からの空気流に乱流などの悪影響を与えることはない。For use in extremely cold regions, a flat plate-like heating element 15 can be attached around the motor fan inlet 6 of the apparatus of FIG. 1 according to the present invention. Since the flat heating element 15 has a large surface area, the heating element 22 such as PTC incorporated in the nozzle 21 of the current apparatus (FIG. 4) does not need to be heated to a high temperature and has high safety. There is no adverse effect such as turbulence on the air flow from 1.

以上のように、本発明装置(図1)では、加熱素子および水分濾過フィルタが不要であり、手の想定位置はノズルに近いので、装置の消費電力は半減される。この結果、制御回路5の一部は省略あるいは小型化される。ノズル1からは良く絞られ、減衰の少ない高速の温風が噴出され、装置外部への水分の飛散が少なく、装置は小型化できる。すなわち、本発明装置(図1)は現行装置(図4)と同等以上の脱水性能を有しながら、消費電力が少なく、安価に装置を構成できるので、業務用だけでなく、一般家庭への普及が期待できる。As described above, in the device of the present invention (FIG. 1), the heating element and the moisture filtration filter are unnecessary, and the assumed position of the hand is close to the nozzle, so the power consumption of the device is halved. As a result, a part of the control circuit 5 is omitted or downsized. The nozzle 1 is well squeezed and high-speed hot air with little attenuation is ejected, so that moisture is not scattered outside the apparatus, and the apparatus can be miniaturized. That is, the device of the present invention (FIG. 1) has a dehydrating performance equivalent to or higher than that of the current device (FIG. 4), and can be configured at low cost with low power consumption. It can be expected to spread.

手がノズル1下部位置に置かれると、センサ7がこれを感知して、モータファン3が始動し、ノズル1から高速の温風が噴出され、手の水分は脱水される。手がノズル1下部から離れるとモータファン3は停止する。なお、本発明装置(図1)では、ノズル1から噴出される空気流を、手の平の付け根から手先の方向へ順次当てれば、手の平の水分は手先の方向へ追いやられ、脱水は完了する。When the hand is placed at the lower position of the nozzle 1, the sensor 7 detects this, the motor fan 3 is started, high-speed hot air is ejected from the nozzle 1, and the moisture in the hand is dehydrated. When the hand leaves the lower part of the nozzle 1, the motor fan 3 stops. In the device of the present invention (FIG. 1), if the air flow ejected from the nozzle 1 is sequentially applied from the base of the palm to the hand, the moisture in the palm is driven toward the hand and the dehydration is completed.

本発明装置(断面図)Invention device (cross-sectional view) 本発明装置の蓋The lid of the device of the present invention 本発明装置のリブRibs of the device of the present invention 現行装置(断面図)Current equipment (cross section)

1ノズル、2外気取入口、3モータファン(収納部)、4装置吸入口、5制御回路(収納部)、6ファン吸入口、7センサ、8容器凸斜面、9蓋凹斜面、10圧力室、11モータファン吹出口、12カバ、13a、13bノズル両端、14a、14b空気整流板、15平板状発熱素子、21ノズル、22発熱素子、23モータファン、24制御回路、25水分濾過フィルタ、26ファン吸入口、27外気取入口、28カバ、1 nozzle, 2 outside air intake, 3 motor fan (housing part), 4 device inlet, 5 control circuit (housing part), 6 fan inlet, 7 sensor, 8 container convex slope, 9 lid concave slope, 10 pressure chamber , 11 motor fan outlet, 12 cover, 13a, 13b nozzle both ends, 14a, 14b air rectifying plate, 15 flat plate heating element, 21 nozzle, 22 heating element, 23 motor fan, 24 control circuit, 25 moisture filtration filter, 26 Fan inlet, 27 outside air intake, 28 covers,

Claims (2)

モータファンで圧縮された空気をノズルから噴出させる方式の手乾燥機において、モータファン収納容器底部の外壁に設けられた凸斜面と、一部が円弧状のノズルを形成するよう切欠かれた凹斜面を持つ円筒状の蓋で、圧力室が形成された手乾燥機。In a hand dryer that blows air compressed by a motor fan from a nozzle, a convex slope provided on the outer wall of the bottom of the motor fan storage container and a concave slope that is partially cut away to form an arc-shaped nozzle A hand dryer with a cylindrical lid and a pressure chamber. ノズル上方に設けられた空気取入口から取入れられた外気が、ファン吸入口6に至る空気通路を持つ請求項1記載の手乾燥機。The hand dryer according to claim 1, wherein outside air taken in from an air inlet provided above the nozzle has an air passage leading to the fan inlet 6.
JP2009186867A 2009-07-21 2009-07-21 Hand dryer Expired - Fee Related JP6044879B2 (en)

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