JP4321516B2 - Electric vacuum cleaner - Google Patents

Electric vacuum cleaner Download PDF

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JP4321516B2
JP4321516B2 JP2005325684A JP2005325684A JP4321516B2 JP 4321516 B2 JP4321516 B2 JP 4321516B2 JP 2005325684 A JP2005325684 A JP 2005325684A JP 2005325684 A JP2005325684 A JP 2005325684A JP 4321516 B2 JP4321516 B2 JP 4321516B2
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dust
rotational speed
rotation speed
rotating brush
dust detection
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JP2007130207A (en
JP2007130207A5 (en
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昭人 伊藤
裕夫 大島
裕之 妹尾
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、電気掃除機に関するものである。   The present invention relates to a vacuum cleaner.

従来の電気掃除機としては、ごみが通過する吸気経路に設けたごみ検知手段によって、ごみ量やごみの質を判断し、吸込具の回転ブラシの制御などを行う電気掃除機がある（例えば、特許文献１参照）。
特許第２７３７４１０号公報 As a conventional vacuum cleaner, there is a vacuum cleaner that judges the amount of dust and the quality of dust by means of dust detection means provided in the intake passage through which dust passes, and controls the rotary brush of the suction tool (for example, Patent Document 1).
Japanese Patent No. 2737410

現在、生活環境の変化により、ハウスダストに対する関心が高まり、数μｍの小さいごみを検出できる電気掃除機のごみ検知装置、およびそのごみ検知装置によって最適な掃除を行う電気掃除機が要求されている。   At present, interest in house dust is increasing due to changes in living environment, and there is a demand for a vacuum detector that can detect small dust of several μm, and a vacuum cleaner that performs optimum cleaning with the dust detector. .

しかしながら、前記従来の電気掃除機の構成では、ごみの数について検出信号であるパルスの数で、その大きさについてはパルスの幅で判断しているが、この場合にごみの大きさをパルス幅で見るための変換部の回路特性を考慮すると、検出できるごみの大きさには制限があり、数μｍの小さいごみを検出できることは困難であることが判ってきた。家庭内にあるごみの大きさは、掃除機で掃除するものだけでもその大きさに数千倍以上の差があり、検出回路の特性（主に、信号の増幅率やその周波数特性など）を小さなごみに合わせると大きめのごみに対し、パルス数としては反応できてもパルス幅での判断は困難であり、その逆にある程度の大きさに特性を合わせると小さいごみに対してパルスが発生しないという問題点があった。   However, in the configuration of the conventional vacuum cleaner, the number of dust is determined by the number of pulses as a detection signal, and the size is determined by the width of the pulse. In this case, the size of the dust is determined by the pulse width. In view of the circuit characteristics of the conversion unit for viewing in the above, it has been found that there is a limit to the size of dust that can be detected, and it is difficult to detect small dust of several μm. There is a difference of several thousand times or more in the size of garbage in the home, even if it is only cleaned with a vacuum cleaner, and the characteristics of the detection circuit (mainly the signal amplification factor and its frequency characteristics) Even if it is possible to respond to the larger garbage when it is combined with small garbage, it is difficult to judge by pulse width even if it can respond as the number of pulses, and conversely, if characteristics are matched to a certain size, pulses will not be generated for small garbage There was a problem.

更に、前記従来の電気掃除機の構成では、吸気の流速とほぼ同速で吸引される検出部より十分に小さいごみに対しては、その大きさがパルス信号の幅として判断できるものではなかった。例えば、通過するごみの大きさを直径Ｘの球体、受光部の大きさを直径Ｙの円、通過速度を吸気速度とほぼ等しいＺとすると、通過時間は（Ｘ＋Ｙ）／Ｚであるが、ここでＸ＜＜Ｙであるときには通過時間はＹ／Ｚとなり、ごみの大きさによる通過時間の変化はほぼ無くなってしまうことになる。したがって、これまではある程度の大きさのごみに特性を合わせており、その制御についても十分に小さなごみに対しての有効な回転ブラシの制御を行うことができなかった。   Further, in the configuration of the conventional vacuum cleaner, the size of the dust that is sufficiently smaller than the detection unit sucked at substantially the same speed as the flow rate of the intake air cannot be determined as the width of the pulse signal. . For example, if the size of dust passing through is a sphere with a diameter X, the size of the light receiving part is a circle with a diameter Y, and the passing speed is Z, which is approximately equal to the intake speed, the passing time is (X + Y) / Z. When X << Y, the passing time is Y / Z, and the change in the passing time due to the size of the dust is almost eliminated. Therefore, until now, characteristics have been adjusted to a certain size of dust, and it has been impossible to control the rotating brush effectively for sufficiently small dust.

本発明は前記従来の課題を解決するもので、様々な大きさのごみに対してより最適な回転ブラシの制御を行うことで、被掃除床面に合わせてより最適な掃除を行うことができる電気掃除機を提供することを目的とする。   The present invention solves the above-mentioned conventional problems, and more optimal cleaning can be performed according to the floor surface to be cleaned by controlling the rotating brush more optimally for various sizes of garbage. An object is to provide a vacuum cleaner.

前記従来の課題を解決するために、本発明の電気掃除機は、本体に内蔵した吸引風を発生するファンモーターと、被掃除床面の塵埃を吸引する回転ブラシを有する吸込具と、前記回転ブラシの回転数を制御する制御手段と、前記制御手段が制御する前記回転ブラシの回転数を設定する回転数設定手段と、前記ファンモーターと吸込具の間の吸気経路に設けられ、ごみを検出する塵埃検出手段Ａと前記塵埃検出手段Ａが検出するごみより小さなごみを検出する塵埃検出手段Ｂとを備え、前記回転数設定手段は前記複数の塵埃検出手段が検出するごみの量に応じて前記回転ブラシの回転数を設定すると共に、所定時間あたりの前記塵埃検出手段Ａの塵埃検出数Ｃａおよび前記塵埃検出手段Ｂの塵埃検出数ＣｂがＣａ＝Ｃｂ＝０のときにおける前記回転ブラシの設定回転数から、前記ＣａまたはＣｂのそれぞれ所定値の上昇毎に、前記回転ブラシの設定回転数を上昇させる設定テーブルを有し、前記設定テーブルは、前記Ｃａのみが所定値以上の上昇をし、回転ブラシの回転数が１ランク上の設定回転数αに引き上げられた場合と、前記Ｃｂのみが所定値以上の上昇をし、
回転ブラシの回転数が１ランク上の設定回転数βに引き上げられた場合との、α、βの関係がα＜βとなる部分を有する構成としたものである。 In order to solve the above-described conventional problems, the vacuum cleaner of the present invention includes a fan motor that generates suction air built in a main body, a suction tool having a rotating brush that sucks dust on the floor to be cleaned, and the rotation Control means for controlling the rotation speed of the brush, rotation speed setting means for setting the rotation speed of the rotating brush controlled by the control means, and an intake path between the fan motor and the suction tool, and detecting dust Dust detection means A and dust detection means B for detecting dust smaller than the dust detected by the dust detection means A, and the rotational speed setting means according to the amount of dust detected by the plurality of dust detection means. wherein in said sets the rotational speed of the rotary brush, when the dust detection count of said dust detecting means a per predetermined time Ca and dust detection number Cb of the dust detection means B is Ca = Cb = 0 A setting table for increasing the setting rotation speed of the rotating brush for each increase of the predetermined value of Ca or Cb from the setting rotation speed of the rolling brush, wherein only the Ca is not less than a predetermined value. When the rotation speed of the rotating brush is increased to the set rotation speed α that is one rank higher, only the Cb increases above a predetermined value,
The configuration is such that the relationship between α and β when the rotational speed of the rotary brush is raised to a set rotational speed β that is one rank higher is such that α <β .

これによって、様々な大きさのごみに対して特性を合わせた複数の塵埃検出手段を備えた上で、その複数の検出信号に対する判断を行ってより精度よく回転ブラシの回転数を制御することが可能になるため、被掃除床面に合わせてより最適な掃除を行うことができる電気掃除機を使用者に提供することができる。   This makes it possible to control the rotational speed of the rotary brush more accurately by providing a plurality of dust detection means having characteristics matched to various sizes of dust and making a determination on the plurality of detection signals. Since it becomes possible, a user can be provided with the vacuum cleaner which can perform more optimal cleaning according to the floor surface to be cleaned.

本発明の電気掃除機は、様々な大きさのごみに対して特性を合わせた複数の塵埃検出手段を備えた上で、その複数の検出信号に対する判断を行ってより精度よく回転ブラシの回転数を制御することで、被掃除床面に合わせた最適な掃除を行うことができる。   The vacuum cleaner of the present invention includes a plurality of dust detection means having characteristics matched to various sizes of dust, and makes a determination with respect to the plurality of detection signals to more accurately rotate the rotational speed of the rotating brush. By controlling this, it is possible to perform optimum cleaning in accordance with the floor surface to be cleaned.

第１の発明は、本体に内蔵した吸引風を発生するファンモーターと、被掃除床面の塵埃を吸引する回転ブラシを有する吸込具と、前記回転ブラシの回転数を制御する制御手段と、前記制御手段が制御する前記回転ブラシの回転数を設定する回転数設定手段と、前記ファンモーターと吸込具の間の吸気経路に設けられ、ごみを検出する塵埃検出手段Ａと前記塵埃検出手段Ａが検出するごみより小さなごみを検出する塵埃検出手段Ｂとを備え、前記回転数設定手段は前記複数の塵埃検出手段が検出するごみの量に応じて前記回転ブラシの回転数を設定すると共に、所定時間あたりの前記塵埃検出手段Ａの塵埃検出数Ｃａおよび前記塵埃検出手段Ｂの塵埃検出数ＣｂがＣａ＝Ｃｂ＝０のときにおける前記回転ブラシの設定回転数から、前記ＣａまたはＣｂのそれぞれ所定値の上昇毎に、前記回転ブラシの設定回転数を上昇させる設定テーブルを有し、前記設定テーブルは、前記Ｃａのみが所定値以上の上昇をし、回転ブラシの回転数が１ランク上の設定回転数αに引き上げられた場合と、前記Ｃｂのみが所定値以上の上昇をし、回転ブラシの回転数が１ランク上の設定回転数βに引き上げられた場合との、α、βの関係がα＜βとなる部分を有する構成とすることにより、様々な大きさのごみに対して特性を合わせた複数の塵埃検出手段を備えた上で、その複数の検出信号に対する判断を行ってより精度よく回転ブラシの回転数を制御することが可能になるため、被掃除床面に合わせて最適な掃除を行うことができる。 The first invention includes a fan motor that generates suction air built in the main body, a suction tool having a rotating brush that sucks dust on the floor surface to be cleaned, control means for controlling the number of rotations of the rotating brush, A rotation speed setting means for setting the rotation speed of the rotary brush controlled by the control means, a dust detection means A for detecting dust , and a dust detection means A provided in an intake path between the fan motor and the suction tool. Dust detection means B for detecting dust smaller than dust to be detected , and the rotation speed setting means sets the rotation speed of the rotary brush according to the amount of dust detected by the plurality of dust detection means, and has a predetermined value. From the set rotation speed of the rotary brush when the dust detection number Ca of the dust detection means A and the dust detection number Cb of the dust detection means B per time is Ca = Cb = 0, the Ca or Each time Cb increases by a predetermined value, the setting table has a setting table for increasing the set rotational speed of the rotating brush. In the setting table, only Ca increases by a predetermined value or more, and the rotational speed of the rotating brush is 1. Α when the rotational speed is increased to a set rotational speed α on the rank, and when only Cb is increased by a predetermined value or more and the rotational speed of the rotating brush is increased to the rotational speed setting β that is one rank higher. By having a configuration in which the relation of β is such that α <β, a plurality of dust detection means having characteristics corresponding to various sizes of dust are provided, and determination on the plurality of detection signals Since it becomes possible to control the rotation speed of the rotating brush with higher accuracy, it is possible to perform optimum cleaning according to the floor surface to be cleaned.

また、特にじゅうたんなど小さなごみの検出数が多い場合には、毛の奥に入った塵埃掻き出すために回転数を上昇しやすくし、逆にフローリングのような小さなごみが残りにくく、小さなごみの検出数が少なくなる場合には、回転数をあまり上昇させなくても塵埃が取れるため、回転数を上昇しにくくして不必要に回転数が上がらないようにし、回転ブラシを駆動させるためのエネルギーを節約でき、回転ブラシのブラシが床面をたたく騒音を抑えることができる。   Also, especially when there are many small dust detections such as carpets, the number of rotations can be easily increased to scrape the dust that has entered the back of the hair. When the number decreases, dust can be removed without increasing the rotation speed so much that it is difficult to increase the rotation speed so that the rotation speed does not increase unnecessarily, and the energy for driving the rotating brush is reduced. It can save, and the noise of the brush of the rotating brush hits the floor surface can be suppressed.

第２の発明は、第１の発明の回転数設定手段は、所定時間あたりの塵埃検出手段Ｂの塵埃検出数Ｃｂがあらかじめ定めた判定値以下である場合には回転ブラシの設定回転数を低下させるか又は前記回転ブラシを停止させることにより、フローリングのような小さなごみが残りにくく、掃除のときも小さなごみがあまり取れないような被掃除床面では回転ブラシの回転を低下又は停止することで、フローリングのような回転ブラシを回転させなくてもごみが取れるような被掃除床面では、省エネを実現することができる。 According to a second aspect, the rotational speed setting means of the first aspect reduces the rotational speed setting of the rotary brush when the dust detection number Cb of the dust detection means B per predetermined time is equal to or less than a predetermined determination value. By stopping or rotating the rotating brush, it is possible to reduce or stop the rotation of the rotating brush on the floor to be cleaned where small dust such as flooring hardly remains and small dust cannot be removed even during cleaning. Energy saving can be realized on the floor to be cleaned where dust can be removed without rotating a rotating brush such as flooring.

第３の発明は、第１または第２の発明の制御手段が、運転開始から所定時間は、回転ブラシの回転数を所定値に固定することにより、運転開始時はある程度回転ブラシの回転数を確保することで、運転開始直後から正確に掃除する被掃除床面とそのごみ量が検出でき、回転ブラシの回転数をより早く狙いの値に設定することができ、掃除にかかる時間を短くすることができる。   In the third invention, the control means of the first or second invention fixes the rotation speed of the rotating brush to a predetermined value for a predetermined time from the start of operation, so that the rotation speed of the rotating brush is controlled to some extent at the start of operation. By ensuring, the floor surface to be cleaned and the amount of dust can be detected accurately immediately after the start of operation, the rotation speed of the rotating brush can be set to the target value earlier, and the time required for cleaning can be shortened be able to.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

（実施の形態１）
以下、本発明の実施の形態１について図面を用いて説明する。 (Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

第１図は本発明の実施の形態１における電気掃除機のごみ検知装置のブロック図である。第１図において、２３１はファンモーター（図示せず）による吸引風によってごみが流れる空気通路内に光を放つ発光部と、その光を受光し受光量に応じた信号を出力する受光部から成るセンサー部で、センサー部２３１からの出力Ｖｓは塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６にそれぞれ入力される。塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６はそれぞれオペアンプなどの増幅手段やフィルター手段、比較手段等によって構成され、Ｖｓの変化量があらかじめ定めた判定値以上であった場合にそれぞれパルスを出力する。すなわち、センサー部２３１をごみが通過したときには、受光部に当たる光がごみによって遮られて受光部の受光量が減少し、出力Ｖｓも減少するため、この現象を利用して、塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６はＶｓの変化量△Ｖｓに応じてそれぞれ判定値ＶａとＶｂを持ち、△Ｖｓ＞Ｖａ、△Ｖｓ＞Ｖｂ、になったときに塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６はそれぞれパルスＳａとＳｂを出力することで、ごみを検出することができる。また、ＶａとＶｂはそれぞれ検出するごみの大きさが異なるような値に設定しており、塵埃検出手段Ａ２３５は１００μｍ以上の砂粒より大きなごみを検出できるように、塵埃検出手段Ｂ２３６は１０μｍ以上の小さなごみを検出できるようにそれぞれ設定しており、塵埃検出手段Ａ２３５が塵埃を検出するときには必ず塵埃検出手段Ｂ２３６も塵埃を検出するような設定になっている。回転数設定手段１１は、このＳａとＳｂの２つの信号入力によって掃除している被掃除床面とごみ量を判別し、吸込具（図示せず）にある回転ブラシ９の回転数を設定し、制御手段１０はその回転数設定になるように回転ブラシ９の電動機（図示せず）への供給電力を変化させて回転数を制御する。   FIG. 1 is a block diagram of a dust detection device for a vacuum cleaner according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 231 includes a light emitting unit that emits light into an air passage through which dust flows by suction air from a fan motor (not shown), and a light receiving unit that receives the light and outputs a signal corresponding to the amount of light received. In the sensor unit, the output Vs from the sensor unit 231 is input to the dust detection unit A235 and the dust detection unit B236, respectively. The dust detection means A235 and the dust detection means B236 are each constituted by an amplification means such as an operational amplifier, a filter means, a comparison means, etc., and each outputs a pulse when the amount of change in Vs is equal to or greater than a predetermined determination value. That is, when the dust passes through the sensor unit 231, the light hitting the light receiving unit is blocked by the dust, the amount of light received by the light receiving unit is reduced, and the output Vs is also reduced. The dust detection means B236 has the determination values Va and Vb according to the change amount ΔVs of Vs, respectively. When ΔVs> Va and ΔVs> Vb, the dust detection means A235 and the dust detection means B236 are pulsed respectively. By outputting Sa and Sb, dust can be detected. In addition, Va and Vb are set to values such that the size of the dust to be detected is different, and the dust detection means B236 is 10 μm or more so that the dust detection means A235 can detect dust larger than a sand particle of 100 μm or more. Each is set so that small dust can be detected, and when the dust detection means A235 detects dust, the dust detection means B236 is always set to detect dust. The rotational speed setting means 11 discriminates the floor surface to be cleaned and the amount of dust by inputting two signals Sa and Sb, and sets the rotational speed of the rotary brush 9 in the suction tool (not shown). The control means 10 controls the rotational speed by changing the power supplied to the electric motor (not shown) of the rotary brush 9 so that the rotational speed is set.

以上のように構成された電気掃除機についてその動作を説明する。   The operation of the vacuum cleaner configured as described above will be described.

図２はじゅうたん・たたみ・フローリングを掃除したときの、塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６が検出する塵埃検出数の分布（５秒間あたりの検出数）である。じゅうたんは毛の奥や毛自体に細かい塵や埃が付着しやすく、また、ダニが繁殖しやすいため、そのダニの死骸やフンが溜まる傾向にある。これらの塵埃は大きさが数十〜１０μｍレベルの小さなごみがほとんどであるため、塵埃検出手段Ａ２３５では検出できず、塵埃検出手段Ｂ２３６のみが検出できる。これが畳やフローリングになると、ダニが繁殖しづらく、また細かい塵や埃は被掃除床面に留まらずに舞い上がってしまい、じゅうたんよりも少なくなるため、図２のような分布になる。   FIG. 2 shows a distribution (number of detections per 5 seconds) of the number of detected dusts detected by the dust detection means A235 and the dust detection means B236 when the carpet, the fold and the flooring are cleaned. Carpets tend to have fine dust and dirt attached to the back of the hair and the hair itself, and because mites tend to breed, the carcasses and dung of these mites tend to accumulate. Since these dusts are mostly small trash with a size of several tens to 10 μm, they cannot be detected by the dust detection means A235 and can be detected only by the dust detection means B236. When this becomes a tatami mat or flooring, ticks are hard to propagate, and fine dust and dust will rise up without staying on the floor to be cleaned, and will be less than a carpet, resulting in a distribution as shown in FIG.

この性質を利用して、回転数設定手段１１は、塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６から出力される信号Ｓａと信号Ｓｂから、それぞれの５秒間の塵埃検出数を求め（以下、Ｃａ、Ｃｂとする）、回転ブラシ９の狙いの回転数を設定するための、図３のような設定テーブルを用いて、１０００〜３０００回転／分の間で回転ブラシ９を駆動させる。この設定テーブルは、上記にあるような被掃除床面の性質を利用し、小さなごみの検出数が多いほど回転数を上昇しやすくし、逆に大きなごみの検出数だけが多くても回転数はあまり上昇しないような設定にしてある。これは、じゅうたんなど小さなごみの検出数（Ｃａ）が多い場合には、毛の奥に入った塵埃を掻き出すために回転数を上昇しやすくし、逆にフローリングなど小さなごみの検出数が少なくなる場合には、回転数をあまり上昇させなくても塵埃が取れるため、回転数を上昇しにくくして不必要に回転数が上がらないようにしてある。   Utilizing this property, the rotation speed setting means 11 obtains the number of detected dusts for 5 seconds from the signals Sa and Sb output from the dust detecting means A235 and the dust detecting means B236 (hereinafter referred to as Ca, Cb). ), The rotary brush 9 is driven at a speed of 1000 to 3000 rpm using a setting table as shown in FIG. 3 for setting the target rotational speed of the rotary brush 9. This setting table uses the property of the floor to be cleaned as described above, and the more the number of small dust detected, the easier it is to increase the number of revolutions. Is set so as not to rise very much. This is because when the number of small dusts such as carpets (Ca) is large, the number of small dusts such as flooring is reduced because the number of rotations is easily increased in order to scrape dust that has entered the back of the hair. In this case, dust can be removed even if the rotational speed is not increased so much, so that the rotational speed is hardly increased and the rotational speed is not increased unnecessarily.

この図３の設定テーブルを用いてフローリングとじゅうたんを掃除したときの、運転開始からの回転数設定手段１１が設定する回転数の推移を図４に示す。運転開始から５秒間は、その前５秒間は運転していない、すなわちごみを吸引していないため、Ｃａ＝Ｃｂ＝０であり、設定テーブルにより、回転数設定は１０００回転／分に設定される。そして、５秒経過後は０〜５秒のＣａとＣｂから回転数設定が決定される。図４の場合、フローリングでは０〜５秒のＣａ＝３４、Ｃｂ＝７０であるため、図３の設定テーブルによって５〜１０秒の回転数設定は１３００回転／分になり、じゅうたんでは０〜５秒のＣａ＝８０、Ｃｂ＝５００であるため、図３の設定テーブルによって５〜１０秒の回転数設定は３０００回転／分まで上昇させ、毛の奥や毛自体に付着した塵や埃を強く掻き出すようにする。   FIG. 4 shows the transition of the rotational speed set by the rotational speed setting means 11 from the start of operation when the flooring and the carpet are cleaned using the setting table of FIG. For 5 seconds from the start of operation, since no operation is performed for the previous 5 seconds, that is, dust is not sucked, Ca = Cb = 0, and the rotation speed setting is set to 1000 rotations / minute by the setting table. . Then, after the elapse of 5 seconds, the rotational speed setting is determined from Ca and Cb of 0 to 5 seconds. In the case of FIG. 4, since Ca = 34 and Cb = 70 for 0 to 5 seconds in the flooring, the rotation speed setting for 5 to 10 seconds is 1300 rotations / minute according to the setting table of FIG. 3, and 0 to 5 for the carpet. Since Ca = 80 for second and Cb = 500, the rotational speed setting for 5 to 10 seconds is increased to 3000 revolutions / minute according to the setting table in FIG. 3, and dust and dirt adhering to the back of the hair and the hair itself are strongly strengthened. Scrap out.

このような制御を行うことで、被掃除床面に合わせて最適な回転ブラシ９の回転数を設定でき、必要ないときには回転ブラシ９の回転数をあまり上げないことで、回転ブラシ９を駆動させるためのエネルギーを節約でき、回転ブラシ９のブラシが床面をたたく騒音を抑えることができる。   By performing such control, it is possible to set the optimum rotation speed of the rotating brush 9 according to the floor surface to be cleaned, and to drive the rotating brush 9 by not increasing the rotation speed of the rotating brush 9 when not necessary. Energy can be saved, and the noise of the rotary brush 9 hitting the floor can be suppressed.

また、フローリングのような被掃除床面では小さな塵埃が少ないので、図５のように小さな塵埃が少ないとき（検出数２０／秒未満であるとき）に回転ブラシ９の回転を停止することで、回転ブラシを回転させなくてもごみが取れるような被掃除床面では、より省エネと低騒音を実現することができる。この図４の設定テーブルを用いてフローリングとじゅうたんを掃除したときの、運転開始からの回転数設定手段１１が設定する回転数の推移は図６のようになる。   In addition, since there is little dust on the floor surface to be cleaned such as flooring, by stopping the rotation of the rotating brush 9 when there is little dust (when the number of detection is less than 20 / second) as shown in FIG. Energy savings and low noise can be achieved on the floor to be cleaned where dust can be removed without rotating the rotating brush. Changes in the rotational speed set by the rotational speed setting means 11 from the start of operation when the flooring and carpet are cleaned using the setting table of FIG. 4 are as shown in FIG.

以上のような制御を行う場合、掃除機の運転を開始した直後は回転ブラシ９の回転数の設定が、図３の設定テーブルの場合は１０００回転／分、図５の設定テーブルの場合は０回転／分（停止）になるなど低い回転数になっており、じゅうたんを掃除するときは回転ブラシ９が塵埃を掻き出す力が弱いために塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６の検出数は低くなり、回転ブラシ９の回転数が上がりにくくなってしまう。したがって、運転開始から所定時間、本実施例では運転開始から次の回転数が決定されるまでの５秒間は、制御手段１０は回転ブラシ９の回転数を１０００回転〜３０００回転の中間である、２０００回転／分に設定することで、運転開始直後から正確に掃除する被掃除床面とそのごみ量が検出でき、回転ブラシ９の回転数をより早く狙いの値に設定することができる。この方式を図５の設定テーブルに適用したときの運転開始からの回転数設定手段１１が設定する回転数の推移は図７のようになり、図４や図６のよりもより早い時間で回転数が上がり、それによってすぐに塵埃を吸引できるため、塵埃の検出数も下がりやすくなり、その結果掃除にかかる時間を短くすることができる。また、本実施の形態では運転開始時の回転数設定を１０００回転〜３０００回転の中間である２０００回転／分に設定したが、実際の家庭に合わせてじゅうたんが多い家庭に合わせる場合は３０００回転／分にしたり、フローリングが多い家庭に合わせる場合は１０００回転／分にしたりするなど、家庭の掃除される床面によって変更することができる。   When the above control is performed, the rotation speed of the rotary brush 9 is set immediately after the operation of the vacuum cleaner is started, 1000 rotations / minute in the case of the setting table of FIG. 3, and 0 in the case of the setting table of FIG. The number of rotations per minute (stop) is low, and when the carpet is cleaned, the detection force of the dust detection means A235 and the dust detection means B236 is low because the rotating brush 9 has a weak force to scrape dust. The rotational speed of the rotating brush 9 is difficult to increase. Therefore, the control means 10 has the rotational speed of the rotary brush 9 in the middle of 1000 to 3000 rotations for a predetermined time from the start of operation, in this embodiment, for 5 seconds until the next rotation speed is determined from the start of operation. By setting it to 2000 revolutions / minute, it is possible to detect the floor surface to be cleaned and the amount of dust accurately cleaned immediately after the start of operation, and to set the rotational speed of the rotating brush 9 to a target value earlier. When this method is applied to the setting table of FIG. 5, the transition of the rotation speed set by the rotation speed setting means 11 from the start of operation is as shown in FIG. 7, and the rotation is performed at an earlier time than that of FIG. 4 and FIG. As the number increases, the dust can be sucked immediately, so the number of detected dust tends to decrease, and as a result, the time required for cleaning can be shortened. Further, in this embodiment, the rotation speed setting at the start of operation is set to 2000 rotations / minute, which is an intermediate between 1000 rotations and 3000 rotations, but 3000 rotations / minute when adjusting to a home with many carpets in accordance with the actual home. It can be changed according to the floor surface to be cleaned, such as dividing into a minute, or adjusting to a household with many floorings, such as 1000 rpm.

上記のように小さなごみが多いほど回転ブラシ９の回転数を上げるような制御を行う場合、関東ローム層などのごく小さな砂が空気中に舞うような地域では、フローリングでも塵埃検出手段Ｂ２３６の検出数が多くなるため、特にフローリングがメインでじゅうたん等があまり無い家庭では、この傾向が特に出てしまい、回転ブラシ９の回転数を不必要に上げてしまい、無駄なエネルギーを消費し、騒音も大きくなってしまうことがある。このような場合には図８のような設定テーブルにして小さなごみが入ってきた場合には回転数をあまり上げないことで対応することが可能である。この場合、小さなごみが入ってきた時に回転数をあまり上げないだけの設定の場合、じゅうたんを掃除した場合でもあまり回
転数が上がらくなってしまい、汚れたじゅうたんでは塵埃が取れにくくなってしまうので、図８の設定では小さな塵埃が多量に入ってきたとき、本実施の形態では塵埃検出手段Ｂ２３６が３００回／５秒以上検出したときには、回転ブラシ９の回転数設定を急激に上げる設定にすることで対応し、汚れたじゅうたんでも回転ブラシ９によって毛の奥に入った塵埃を掻き出すことができる。 When the control is performed to increase the rotation speed of the rotary brush 9 as the amount of small dust increases as described above, the dust detection means B236 detects the floor even in the area where very small sand such as the Kanto Loam layer is flying in the air. This is especially true in homes where the flooring is main and there are not many carpets due to the increase in the number, which unnecessarily increases the number of rotations of the rotating brush 9, consumes unnecessary energy, and generates noise. Sometimes it gets bigger. In such a case, when small dust enters the setting table as shown in FIG. 8, it can be dealt with by not increasing the rotational speed so much. In this case, if the setting is such that the number of revolutions does not increase too much when small garbage enters, even if the carpet is cleaned, the number of revolutions becomes too high, and dirt carpet makes it difficult to remove dust. In the setting of FIG. 8, when a large amount of small dust enters, in this embodiment, when the dust detection means B236 detects 300 times / 5 seconds or more, the rotational speed setting of the rotary brush 9 is set to be rapidly increased. Therefore, even if the carpet is dirty, the rotating brush 9 can scrape out dust that has entered the back of the hair.

本実施の形態では、５秒区切りで回転数を設定していたが、過去５秒間の検出数を元に１秒単位で回転数を変更することで、よりリアルタイムに回転数を変化させることも可能である。さらに、制御手段１０が回転数を変化させるときに、急激に変化させるのではなく、なだらかに変化させることで、使用時に回転数が変化する違和感を緩和し、回転ブラシ９の電動機の寿命も延ばすことができる。また、塵や埃が溜まった箇所を掃除したときには、塵埃検出手段Ａ２３５と塵埃検出手段Ｂ２３６の検出数が一時的に多くなるので、このときには一時的に回転ブラシ９の回転数を上げることで、より被掃除床面に合わせた掃除を行うことができる。   In this embodiment, the number of revolutions is set every 5 seconds. However, the number of revolutions can be changed in real time by changing the number of revolutions in units of 1 second based on the number of detections in the past 5 seconds. Is possible. Further, when the control means 10 changes the rotation speed, it is not changed suddenly but gently, so that the uncomfortable feeling that the rotation speed changes during use is alleviated and the life of the motor of the rotary brush 9 is extended. be able to. In addition, when the dust and the dust accumulation place are cleaned, the detection number of the dust detection means A235 and the dust detection means B236 is temporarily increased. At this time, by temporarily increasing the rotation speed of the rotary brush 9, It is possible to perform cleaning in accordance with the floor surface to be cleaned.

以上のように、本発明にかかる電気掃除機は、様々な大きさのごみに対して特性を合わせた複数の塵埃検出手段を備えた上で、その複数の検出信号に対する判断を行ってより精度よく回転ブラシの回転数を制御することで、被掃除床面に合わせた最適な回転数で掃除を行うときに有用である。   As described above, the vacuum cleaner according to the present invention includes a plurality of dust detection means having characteristics matched to various sizes of dust, and makes a determination with respect to the plurality of detection signals for more accuracy. By controlling the rotation speed of the rotating brush well, it is useful when performing cleaning at an optimal rotation speed that matches the floor to be cleaned.

本発明の第１の実施の形態における電気掃除機のブロック図The block diagram of the vacuum cleaner in the 1st Embodiment of this invention 同、電気掃除機の複数の塵埃検出手段が検出する塵埃検出数の分布を示す図The figure which shows distribution of the number of dust detections which a plurality of dust detection means of a vacuum cleaner detects 同、電気掃除機の複数の塵埃検出手段が検出する塵埃検出数と、吸込具の回転ブラシの設定回転数との関係を示す図The figure which shows the relationship between the dust detection number which the several dust detection means of a vacuum cleaner detects, and the setting rotation speed of the rotary brush of a suction tool similarly 同、電気掃除機の回転数設定手段が、運転開始から設定する回転ブラシの回転数の推移を表す図The figure which shows transition of the rotation speed of the rotation brush which the rotation speed setting means of a vacuum cleaner sets from the start of operation similarly 同、電気掃除機の複数の塵埃検出手段が検出する塵埃検出数と、吸込具の回転ブラシの設定回転数との関係を示す他の図The other figure which shows the relationship between the dust detection number which the several dust detection means of a vacuum cleaner detects, and the setting rotation speed of the rotary brush of a suction tool similarly 同、電気掃除機の回転数設定手段が、運転開始から設定する回転ブラシの回転数の推移を表す他の図The other figure which shows transition of the rotation speed of the rotation brush which the rotation speed setting means of a vacuum cleaner sets from the start of operation similarly 同、電気掃除機の回転数設定手段が、運転開始から設定する回転ブラシの回転数の推移を表す他の図The other figure which shows transition of the rotation speed of the rotation brush which the rotation speed setting means of a vacuum cleaner sets from the start of operation similarly 同、電気掃除機の複数の塵埃検出手段が検出する塵埃検出数と、吸込具の回転ブラシの設定回転数との関係を示す他の図The other figure which shows the relationship between the dust detection number which the several dust detection means of a vacuum cleaner detects, and the setting rotation speed of the rotary brush of a suction tool similarly

９ 回転ブラシ
１０ 制御手段
１１ 回転数設定手段
２３１ センサー部
２３５ 塵埃検出手段Ａ
２３６ 塵埃検出手段Ｂ DESCRIPTION OF SYMBOLS 9 Rotating brush 10 Control means 11 Rotation speed setting means 231 Sensor part 235 Dust detection means A
236 Dust detection means B

Claims (3)

本体に内蔵した吸引風を発生するファンモーターと、被掃除床面の塵埃を吸引する回転ブラシを有する吸込具と、前記回転ブラシの回転数を制御する制御手段と、前記制御手段が制御する前記回転ブラシの回転数を設定する回転数設定手段と、前記ファンモーターと吸込具の間の吸気経路に設けられ、ごみを検出する塵埃検出手段Ａと前記塵埃検出手段Ａが検出するごみより小さなごみを検出する塵埃検出手段Ｂとを備え、前記回転数設定手段は前記複数の塵埃検出手段が検出するごみの量に応じて前記回転ブラシの回転数を設定すると共に、所定時間あたりの前記塵埃検出手段Ａの塵埃検出数Ｃａおよび前記塵埃検出手段Ｂの塵埃検出数ＣｂがＣａ＝Ｃｂ＝０のときにおける前記回転ブラシの設定回転数から、前記ＣａまたはＣｂのそれぞれ所定値の上昇毎に、前記回転ブラシの設定回転数を上昇させる設定テーブルを有し、前記設定テーブルは、前記Ｃａのみが所定値以上の上昇をし、回転ブラシの回転数が１ランク上の設定回転数αに引き上げられた場合と、前記Ｃｂのみが所定値以上の上昇をし、回転ブラシの回転数が１ランク上の設定回転数βに引き上げられた場合との、α、βの関係がα＜βとなる部分を有する構成とした電気掃除機。 A fan motor that generates suction air built in the main body, a suction tool having a rotating brush that sucks dust on the floor surface to be cleaned, a control unit that controls the number of rotations of the rotating brush, and the control unit that controls the control unit Rotation speed setting means for setting the rotation speed of the rotating brush, dust detection means A for detecting dust, and dust smaller than dust detected by the dust detection means A , provided in the intake path between the fan motor and the suction tool. And a rotational speed setting means for setting the rotational speed of the rotating brush in accordance with the amount of dust detected by the plurality of dust detecting means, and detecting the dust per predetermined time. From the set rotation speed of the rotary brush when the dust detection number Ca of the means A and the dust detection number Cb of the dust detection means B are Ca = Cb = 0, each of the Ca and Cb A setting table for increasing the set rotational speed of the rotating brush every time the predetermined value increases, and only the Ca increases by a predetermined value or more, and the rotational speed of the rotating brush is one rank higher. Relationship between α and β when the rotational speed is increased to the set rotational speed α and when only the Cb is increased by a predetermined value or more and the rotational speed of the rotating brush is increased to the set rotational speed β that is one rank higher Is a vacuum cleaner having a portion where α <β . 回転数設定手段は、所定時間あたりの塵埃検出手段Ｂの塵埃検出数Ｃｂがあらかじめ定めた判定値以下である場合には回転ブラシの設定回転数を低下させるか又は前記回転ブラシを停止させる請求項１記載の電気掃除機。 The rotation speed setting means reduces the set rotation speed of the rotary brush or stops the rotary brush when the dust detection number Cb of the dust detection means B per predetermined time is equal to or less than a predetermined determination value. The electric vacuum cleaner according to 1. 制御手段が、運転開始から所定時間は、回転ブラシの回転数を所定値に固定する請求項１または２に記載の電気掃除機。 The electric vacuum cleaner according to claim 1 or 2, wherein the control means fixes the rotational speed of the rotary brush to a predetermined value for a predetermined time from the start of operation.
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