JP2007054146A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner having lower noises of a sucking utensil for reducing the problem that the rotation number is higher on a wooden floor having less load with an increase of noises of a motor, and that the splashing of refuse by jetting often occurs when the suction force is small. <P>SOLUTION: This vacuum cleaner is equipped with the suction utensil having a rotating brush, the motor which rotates the rotating brush, and a back electromotive detecting means which detects a back electromotive voltage of the motor. When a load on a wooden floor or the like is small a wooden floor, the motor is operated by reducing the application voltage, and when the motor turns locked by a load from a floor surface, the motor is rotated by releasing the locking by raising the application voltage. Thus, the application voltage of the motor can be made variable by the load from the floor surface, and noises can be reduced by suppressing power when the load is small. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電気掃除機に関するもので、特に吸込み具に内蔵されている電動機の静穏かに関するものである。   The present invention relates to a vacuum cleaner, and more particularly to the quietness of an electric motor built in a suction tool.

従来、この種の電気掃除機は、図８に示すように掃除機本体１０１に電動送風機１０２と信号処理部１０３がある制御回路１０４が内蔵され、手元操作部１０５と掃除機本体１０１を接続するホース１０６と、吸込み具１０７に内蔵されている電動機１０８と、電動機１０８によって回転する塵埃をかきあげる回転ブラシ１０９と吸込み具１０７と手元操作部１０５を接続する延長管１１０とから構成されており、手元操作部１０５によって電動送風機１０２の吸込み力コントロールや電動機１０８回転の有無を制御している。またホースの芯線数や、接点数を抑えるために商用電源の片側を電動機１０８まで接続し、その線を基準として電源および手元操作信号伝達を行うように構成されている。また電動機の電流を検出し、過電流時には電動機を停止するものもある（例えば、特許文献１参照）。
特開２００２−２４８０７０号公報 Conventionally, in this type of vacuum cleaner, as shown in FIG. 8, a control circuit 104 having an electric blower 102 and a signal processing unit 103 is built in the vacuum cleaner main body 101, and the hand operating unit 105 and the vacuum cleaner main body 101 are connected. The hose 106, the electric motor 108 built in the suction tool 107, the rotating brush 109 that scoops up the dust rotated by the electric motor 108, and the extension pipe 110 that connects the suction tool 107 and the hand operation unit 105, The operation unit 105 controls the suction force control of the electric blower 102 and the presence / absence of rotation of the electric motor 108. Further, in order to reduce the number of hose core wires and the number of contacts, one side of the commercial power supply is connected to the motor 108, and the power source and the hand operation signal are transmitted with reference to the wire. In addition, there is one that detects the current of the electric motor and stops the electric motor when overcurrent occurs (for example, see Patent Document 1).
JP 2002-248070 A

しかしながら、前記従来の構成においては、吸込み力に対して回転ブラシの印加電圧は一定であり、また床面においても一定の印加電圧であっため、じゅうたん等の負荷が重い条件でごみ取れ性を確保するために一定回転数以上を回転させる必要があり、その条件で電動機の設定をおこなっているため、負荷の軽い木床では回転数が高くなって、電動機の騒音が大きくなり、さらには、ごみの吹き飛ばしが生じる不具合があった。   However, in the conventional configuration, the applied voltage of the rotating brush is constant with respect to the suction force, and the applied voltage is also constant on the floor surface, so that dust removal is ensured under heavy load such as carpets. In order to achieve this, it is necessary to rotate the motor at a certain speed or higher, and the motor is set under these conditions. Therefore, the motor speed is increased on a lightly loaded wooden floor, and the motor noise is increased. There was a defect that caused blow-off.

本発明は、前記従来の課題を解決するもので、床面に合った印加電圧で吸込み具の回転ブラシ用電動機を動作させることで電動機の騒音を抑え、さらにはごみの吹き飛ばしも抑えた使い勝手の高い電気掃除機を提供するものである。   The present invention solves the above-mentioned conventional problems, and operates the rotating brush motor of the suction tool with an applied voltage that matches the floor surface, thereby suppressing the noise of the motor and further reducing the blowing of dust. Provide a high 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、吸込み具に塵埃をかきあげるための回転ブラシと、前記回転ブラシを回転させる電動機と、前記電動機の印加電圧を可変する電動機駆動手段と、前記電動機の逆起電圧を検出する逆起検出手段を備え、木床等の負荷が小さいときには印加電圧を下げて動作させ、じゅうたん等の負荷変化や、使用者が前記吸込み具を床面に押し付けたり等で負荷が重くなり電動機がロック状態になると、印加電圧を上げてロックを解除して電動機を回転させるものである。   In order to solve the above-mentioned conventional problems, the vacuum cleaner of the present invention comprises a rotating brush for scraping dust to a suction tool, an electric motor for rotating the rotating brush, and an electric motor driving means for changing an applied voltage of the electric motor. And a back electromotive force detecting means for detecting a back electromotive voltage of the electric motor, and when the load on the wooden floor is small, the applied voltage is lowered to operate, and a load change of the carpet or the like, or a user removes the suction tool on the floor surface. When the load becomes heavy due to being pressed against the motor and the motor is locked, the applied voltage is increased to release the lock and rotate the motor.

これによってじゅうたん上での負荷が重い床面では印加電圧を上げて電動機は動作を行い、木床等の負荷が軽い床面では印加電圧を下げて電動機を動作させることができる。   This makes it possible to operate the motor by increasing the applied voltage on a floor surface with a heavy load on the carpet, and to operate the motor by decreasing the applied voltage on a floor surface with a light load such as a wooden floor.

本発明の電気掃除機は、じゅうたん上での負荷が重い床面では印加電圧を上げて電動機の動作を行うため、ごみの取れ性は満足し、木床等の負荷が軽い床面では印加電圧を下げて電動機を動作させることで、回転数を抑え、騒音が低減され、更にはごみの吹き飛ばしも低減される。また床面に応じた印加電圧にて動作するため余分な電力が抑えられているだけでなく、電源電圧変動にも自動的に対応することができる。   The vacuum cleaner of the present invention operates the motor by increasing the applied voltage on a heavy floor surface on the carpet, so that the dust removal is satisfied and the applied voltage is on a light floor surface such as a wooden floor. When the electric motor is operated with lowering, the number of rotations is suppressed, noise is reduced, and dust blowing is also reduced. Further, since the operation is performed with the applied voltage according to the floor surface, not only the excessive power is suppressed, but also the fluctuation of the power supply voltage can be automatically dealt with.

第１の発明は、吸込み具に塵埃をかきあげるための回転ブラシと、前記回転ブラシを回転させる電動機と、前記電動機の印加電圧を可変する電動機駆動手段と、前記電動機の逆起電圧を検出する逆起検出手段を備え、木床等の負荷が小さいときには印加電圧を下げて動作させ、じゅうたん等の負荷変化や、使用者が前記吸込み具を床面に押し付けたり等で負荷が重くなり電動機がロック状態になると、印加電圧を上げてロックを解除して電動機を回転させることにより、じゅうたん上での負荷が重い床面では印加電圧を上げて電動機は動作を行うためごみの取れ性は満足しつつ、木床等の負荷が軽い床面では印加電圧を下げて電動機を動作させることで、回転数を抑え、騒音が低減され、更にはごみの吹き飛ばしも低減される。また床面に応じた印加電圧にて動作するため余分な電力が抑えられているだけでなく、電源電圧変動にも自動的に対応することができる。   According to a first aspect of the present invention, there is provided a rotating brush for scraping dust to a suction tool, an electric motor for rotating the rotating brush, electric motor driving means for changing an applied voltage of the electric motor, and a reverse for detecting a counter electromotive voltage of the electric motor. When the load on the wooden floor is small, it is operated by lowering the applied voltage, and the load is heavy when the load of the carpet, etc. is changed or the user presses the suction tool against the floor, and the motor locks. In this state, the applied voltage is increased to release the lock, and the motor is rotated, so that the applied voltage is increased on the floor where the load on the carpet is heavy and the motor operates so that the garbage can be removed. On a floor surface with a light load such as a wooden floor, by operating the electric motor by lowering the applied voltage, the number of rotations is reduced, noise is reduced, and dust blowing is also reduced. Further, since the operation is performed with the applied voltage according to the floor surface, not only the excessive power is suppressed, but also the fluctuation of the power supply voltage can be automatically dealt with.

第２の発明は、吸込み具に塵埃をかきあげるための回転ブラシと、前記回転ブラシを回転させる電動機と、前記電動機の印加電圧を可変する電動機駆動手段と、前記回転ブラシの逆起電圧を検出する逆起検出手段と、吸込み力を発生させる電動送風機と、前記電動送風機の吸込み力を可変する電動送風機駆動手段を備え、初期段階は電動機に印加電圧を加えない状態にしておき、吸込み具を前後往復させたときの逆起電圧によって操作されたことを検出して電動機に電圧を印加させると共に電動送風機の吸込み力をあげることにより、じゅうたん上での負荷が重い床面では電動送風機の吸込み力もあげて取れ性は満足しつつ、木床等の負荷が軽い床面では電動送風機の吸込み力も下げることで、さらに騒音が低減され、ごみの吹き飛ばしも低減される。また床面に応じた吸込み力で動作するため余分な電力が抑えることができる。   2nd invention detects the counter electromotive voltage of the rotating brush for sweeping up dust to a suction tool, the electric motor which rotates the rotating brush, the electric motor drive means which varies the applied voltage of the electric motor, and the rotating brush Equipped with a back electromotive force detection means, an electric blower for generating suction force, and an electric blower drive means for changing the suction force of the electric blower. In the initial stage, an applied voltage is not applied to the motor, and the suction tool is moved back and forth. By detecting the operation by the counter electromotive voltage when reciprocating and applying a voltage to the motor and increasing the suction force of the electric blower, the suction force of the electric blower is also increased on the floor surface where the load on the carpet is heavy In addition, the floor surface is lightly loaded, such as wooden floors, but the suction force of the electric blower is also reduced to further reduce noise and blow off garbage. It is. Moreover, since it operate | moves by the suction force according to the floor surface, excess electric power can be suppressed.

第３の発明は、電動機の印加電圧を複数段階設け、床面および吸込み具の状態によって徐々に印加電圧を可変し、ロックしない最小印加電圧で電動機を回転させることにより、床面に応じた最適な印加電圧で動作可能であり、すべての床面での騒音低減、省エネを行うことができる。   According to the third aspect of the present invention, the applied voltage of the motor is provided in a plurality of stages, the applied voltage is gradually varied depending on the state of the floor surface and the suction tool, and the motor is rotated at the minimum applied voltage that does not lock, so that the optimum according to the floor surface is achieved. It is possible to operate with various applied voltages, and to reduce noise and save energy on all floor surfaces.

第４の発明は、電動機の回転方向を切り替える回転方向切り替え手段を備え、通常は印加電圧を下げて正回転方向で電動機を動作させ、電動機の印加電圧が大きくなって所定の印加電圧以上になったら電動機の回転方向を逆回転に反転させることにより、ごみが比較的にとりやすい負荷の軽い床面では正回転で動作させることで自走性を重視し、じゅうたん上での負荷の重い床面では、逆方向で回転させることでかきあげ力を重視することで、じゅうたん上に入り込んだごみの集塵項率が向上できる。   The fourth invention is provided with a rotation direction switching means for switching the rotation direction of the electric motor. Usually, the applied voltage is lowered and the electric motor is operated in the normal rotation direction, and the applied voltage of the electric motor becomes larger and exceeds the predetermined applied voltage. Then, by reversing the rotation direction of the motor in the reverse direction, it is important to operate on the floor with a light load, which is relatively easy to remove dust, so that the self-propelled performance is emphasized. On the floor with a heavy load on the carpet, By focusing on the lifting force by rotating in the opposite direction, the dust collection rate of the dust that has entered the carpet can be improved.

第５の発明は、電動機の回転方向を切り替える回転方向切り替え手段を備え、通常は印加電圧を下げて逆回転方向で電動機を動作させ、電動機の印加電圧が大きくなって所定の印加電圧以上になったら電動機の回転方向を正回転に反転させることにより、操作性が比較的に軽い負荷の軽い床面では逆回転で動作させることでかきあげ力を重視し、じゅうたん上での操作性が重い床面では、正方向で回転させることで自走性を重視することで、じゅうたん上での操作性が向上できる。   The fifth aspect of the invention comprises a rotation direction switching means for switching the rotation direction of the electric motor, and normally the applied voltage is lowered to operate the electric motor in the reverse rotation direction, so that the applied voltage of the electric motor increases and becomes equal to or higher than the predetermined applied voltage. Then, by reversing the rotation direction of the motor to normal rotation, the operability on the carpet is heavy by optimizing the lifting force by operating in reverse rotation on a light floor surface with relatively light operability. Then, it is possible to improve the operability on the carpet by focusing on self-propelled performance by rotating in the forward direction.

第６の発明は、吸込み具の往復動作を検出する往復検出手段を備え、吸込み具を前に押し出しているときと後ろに引いているときで電動機の印加電圧を可変することにより、往復動作時に最適な印加電圧で動作させることができるため、さらなる騒音低減、省エネを実現することができる。   6th invention is equipped with the reciprocating detection means which detects the reciprocating motion of a suction tool, and changes the applied voltage of an electric motor when the suction tool is pushed forward and pulled back, and at the time of reciprocating motion Since it can be operated with an optimum applied voltage, further noise reduction and energy saving can be realized.

第７の発明は、電動機の印加電圧は初期のみ低くなっており、負荷によって徐々に上昇していくが一旦上昇した印加電圧以下にはならず、再度スイッチ操作や吸込み具を浮かす離床など電動機の動作が設定時間以上停止したときに、リセット動作を行うことにより、吸込み具の往復動作の速度の違いや床面に対して押し付け力の違いなどによる負荷変動が生じても安定して電動機を動作させることができる。   In the seventh aspect of the invention, the applied voltage of the motor is low only in the initial stage, and gradually increases with the load, but does not become lower than the applied voltage that has once increased. When the operation stops for more than the set time, by performing the reset operation, the motor operates stably even if load fluctuations occur due to differences in the speed of the reciprocating operation of the suction tool or differences in the pressing force against the floor surface. Can be made.

第８の発明は、集塵経路内に塵埃の通過を検出するごみ検出手段を備え、電動機を動作させている印加電圧によって床面を判断し、前記ごみ検出手段の感度を変えることにより、床面に合ったごみ検出感度で検出することができる。   According to an eighth aspect of the present invention, there is provided a dust detection means for detecting the passage of dust in the dust collection path, the floor surface is determined based on an applied voltage for operating the electric motor, and the sensitivity of the dust detection means is changed to thereby detect the floor. It can be detected with dust detection sensitivity that matches the surface.

第９の発明は、電動機の回転方向を操作できる操作スイッチを備え、使用者が回転方向を選択できることにより、掃除状況にあった掃除を行うことができる。   9th invention is equipped with the operation switch which can operate the rotation direction of an electric motor, and can perform the cleaning suitable for the cleaning condition because a user can select a rotation direction.

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. The present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の第１の実施の形態における電気掃除機の回路ブロック図、図２に電気掃除機の外観図を示すものである。 (Embodiment 1)
FIG. 1 is a circuit block diagram of a vacuum cleaner according to the first embodiment of the present invention, and FIG. 2 is an external view of the vacuum cleaner.

図２において、１は電気掃除機本体であり、２は吸引力を発生させ、塵埃を集塵室（図示せず）に集塵するための電動送風機を内蔵している。３はホースであり、前記電動送風機２の吸引力の強弱などを変化させる電気掃除機の運転モードを切り替える手元操作部４と掃除機本体１を接続している。６は床面に接して被掃除面の塵埃等を吸引させるための吸込み具であり、被掃除面の塵埃をかきあげる回転ブラシ７と回転ブラシ７を駆動する電動機８を内蔵している。前記回転ブラシ７はベルト（図示せず）などを介して、前記電動機８により駆動されたり、あるいは前記回転ブラシ７内に電動機８を内蔵し、ギア（図示せず）などを介して前記回転ブラシ７を駆動させる方法などがある。５は延長管で、前記吸込み具６と前記ホース４とを連通させている。手元操作部４を操作し、前記電動送風機２および電動機８を駆動させることで、吸込み具６から被掃除面の塵埃はかきあげられ、前記塵埃は、延長管５、ホース３を通って電気掃除機本体１へと運搬され、塵埃は電気掃除機本体１内に内蔵された集塵室（図示せず）に集塵されるとともに、吸込み風は前記電気掃除機本体１より排出される。前記手元操作部４からの操作を受けて、電動送風機２および電動機８の動作を制御している制御回路９は掃除機本体１に内蔵されている。   In FIG. 2, 1 is a main body of a vacuum cleaner, and 2 includes an electric blower for generating suction force and collecting dust in a dust collection chamber (not shown). Reference numeral 3 denotes a hose, which connects the hand operating unit 4 and the cleaner main body 1 for switching the operation mode of the electric vacuum cleaner that changes the strength of the suction force of the electric blower 2. Reference numeral 6 denotes a suction tool for sucking dust on the surface to be cleaned in contact with the floor surface, and has a built-in rotary brush 7 for scraping dust on the surface to be cleaned and an electric motor 8 for driving the rotary brush 7. The rotating brush 7 is driven by the electric motor 8 via a belt (not shown) or the like, or the electric motor 8 is built in the rotating brush 7 and the rotating brush is connected via a gear (not shown) or the like. 7 or the like. Reference numeral 5 denotes an extension pipe that communicates the suction tool 6 and the hose 4. By operating the hand operating unit 4 and driving the electric blower 2 and the electric motor 8, dust on the surface to be cleaned is scraped up from the suction tool 6, and the dust passes through the extension pipe 5 and the hose 3 to be used in the vacuum cleaner. While being transported to the main body 1, dust is collected in a dust collection chamber (not shown) built in the main body 1 of the vacuum cleaner, and the suction air is discharged from the main body 1 of the vacuum cleaner. A control circuit 9 that controls the operation of the electric blower 2 and the electric motor 8 in response to an operation from the hand operation unit 4 is built in the cleaner body 1.

また図１において、本実施の形態の電気掃除機は、電気掃除機本体１、手元操作部４を備えたホース３、延長管５、吸込み具６の４つのブロックに分けられ、１０は回転ブラシ７を回転駆動させる電動機８を位相制御するための電動機駆動手段である。１１は逆起検出手段であり、本実施例では制御回路９の第２の直流電源１２から抵抗を介して電動機駆動手段１０に接続され電動機８に接続されている。また吸込み具６に内蔵されている安全スイッチ１３のＯＮ／ＯＦＦを検出するために安全スイッチ１３の両端にそれぞれ抵抗を介して電動機駆動手段１０に接続されており、ロックされると位相制御しているＯＦＦ時の電圧が逆起電圧によって、電圧が変化することでロックを検出している。１４は吸込み力を発生させる電動送風機２を位相制御するための電動送風機駆動手段であり電動送風機２と直列に接続されている。１５は電動送風機２および電動機８に供給する電力を制御する制御手段であるマイクロコンピュータであり、手元操作部４のスイッチ操作情報およびロック検出手段１１からのロック情報を取り込み、その情報をもとに、電動機駆動手段１０および電動送風機駆動手段１４へ位相制御ための点弧パルスを出力し、制御を行っている。１６は手元操作部４の信号を制御回路１１に伝達するための第１の直流電源装置でコモンラインを基準に負電源で構成されている。またこの第１の直流電源装置１６は本体１とホース３の接点の信頼性を向上させるために１２Ｖ以上の負電源としている。１２はマイクロコンピュータ１５の電源となる第２の直流電源装置であり、第１の直流電源装置１６から降圧して作成しており、コモンラインを基準に負電源となっている。１７は電気掃除機に電力を供給する商用電源である。   In FIG. 1, the vacuum cleaner of the present embodiment is divided into four blocks: a vacuum cleaner body 1, a hose 3 provided with a hand operation unit 4, an extension pipe 5, and a suction tool 6. 7 is an electric motor driving means for controlling the phase of the electric motor 8 that rotationally drives the electric motor 7. Reference numeral 11 denotes back electromotive force detection means. In this embodiment, the second DC power supply 12 of the control circuit 9 is connected to the motor driving means 10 via a resistor and connected to the motor 8. Moreover, in order to detect ON / OFF of the safety switch 13 built in the suction tool 6, both ends of the safety switch 13 are connected to the electric motor driving means 10 through resistors, and when locked, the phase is controlled. The lock is detected by changing the voltage due to the counter electromotive voltage of the OFF voltage. Reference numeral 14 denotes an electric blower driving means for phase-controlling the electric blower 2 that generates a suction force, and is connected in series with the electric blower 2. Reference numeral 15 denotes a microcomputer which is a control means for controlling the electric power supplied to the electric blower 2 and the electric motor 8, and takes in the switch operation information of the hand operation section 4 and the lock information from the lock detection means 11, and based on the information. The ignition pulse for phase control is output to the electric motor driving means 10 and the electric blower driving means 14 for control. Reference numeral 16 denotes a first DC power supply device for transmitting a signal from the hand operating unit 4 to the control circuit 11 and is constituted by a negative power supply with reference to the common line. The first DC power supply 16 is a negative power supply of 12 V or more in order to improve the reliability of the contact between the main body 1 and the hose 3. Reference numeral 12 denotes a second DC power supply device serving as a power source for the microcomputer 15, which is created by stepping down from the first DC power supply device 16, and is a negative power supply based on the common line. Reference numeral 17 denotes a commercial power source that supplies power to the vacuum cleaner.

以上のように構成された電気掃除機について、以下その動作、作用を説明する。   About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

手元操作部４には、図１に示すように複数のスイッチＳＷ１〜ＳＷ３と抵抗ｒ１〜ｒ４が内蔵されており、本体１側の回路に内蔵された抵抗Ｒとの分割電圧の変化によって手元操作がどのように行われているかを認識し、電動機駆動手段１０および電動送風機駆動手段１４にマイクロコンピュータ１５から信号が出力され、電動送風機２および電動機８を手元操作に応じた吸込み力で動作を行う。電動機８の動作ラインには電動機８と直列に接続された安全スイッチ１３があり、安全スイッチ１３の前後に図１に示すように抵抗ｒ５とｒ６が内蔵されており、本体１側の回路に内蔵された抵抗Ｒ２、Ｒ３との分割電圧の変化によって安全スイッチ１３がＯＮされているか、電動機８が回転されているかをマイクロコンピュータ１５は認識し、電動送風機２の吸込み力を制御している。ここで上記安全スイッチ１３のＯＮ／ＯＦＦや電動機８の回転を認識するためおよび、手元操作信号を確実に伝達するために電動機８は一定時間のＯＦＦ期間を有している。これはホース３には抵抗成分が存在するため電動機８に電流を流すと、抵抗成分で電圧降下が生じ直流成分に交流成分が重畳されてしまうために、手元操作が正常に伝達されなくなってしまうからである。またこの一定期間のＯＦＦの中で分割電圧で吸込み具６の状況を認識することも同時に行っている。手元操作を行うとマイクロコンピュータ１５は電動機８に小さい位相制御信号で動作するように電動機駆動手段１０に信号を伝達し、位相制御された電圧で電動機８は動作を行う。ここで正常に回転を行っている状態であるとＯＦＦ期間の電圧は逆起電圧があるためＶ＝５（Ｖ）＊Ｒ２／（Ｒ２＋Ｒ３＋ｒ５とｒ６の合成抵抗）（例えば２Ｖ）となるが、電動機８が床面からの負荷によってロックされると、Ｖ＝５（Ｖ）＊Ｒ２／（Ｒ２＋Ｒ３）（例えば２．８Ｖ）となり電圧が変化する。図３に電圧波形の変化を示す。この電圧変化をマイクロコンピュータ１５が認識してロックを検出すると位相値を電圧が高くなるように変化させる。更に負荷が大きくなってまたロック検出を行うと更に電圧が高くなるように徐々に位相値を変えていくように動作する。また、負荷が重くなるということはじゅうたん上などのごみが集塵しにくい床面であることが認識できるため、電動送風機２の吸込み力も上昇するように電動送風機駆動手段１４に信号を伝達して動作を行う。なおこの電圧変化は完全にロック状態でなくてもある程度回転数が小さくなった時点で商用電源７電圧の低いタイミングから変化してくるためこれを検出して制御してもよいことは言うまでもない。また電動機８の初期印加電圧を０Ｖとすれば、回転していないときにはＶ＝（５（Ｖ）−電動機内蔵整流手段ＶＦ）＊Ｒ２／（Ｒ２＋Ｒ３）（例えば２．３Ｖ）が使用者が吸込み具６を往復動作することで床面からの負荷で強制的に回転する。逆起電圧が発生するため正回転時にはＶ＝５（Ｖ）＊Ｒ２／（Ｒ２＋Ｒ３＋ｒ５とｒ６の合成抵抗）（例えば２Ｖ）となり逆回転時にはＶ＝５（Ｖ）＊Ｒ２／（Ｒ２＋Ｒ３）（例えば２．８Ｖ）と変化するため、それを検出することで始めて電動機８を回転させるようにすることで、初期段階の無駄な電力も抑えられる。   As shown in FIG. 1, the hand operation unit 4 includes a plurality of switches SW1 to SW3 and resistors r1 to r4. The hand operation unit 4 is operated by changing the divided voltage with the resistor R built in the circuit on the main body 1 side. Is recognized, a signal is output from the microcomputer 15 to the electric motor driving means 10 and the electric blower driving means 14, and the electric blower 2 and the electric motor 8 are operated with a suction force corresponding to the hand operation. . The operation line of the electric motor 8 includes a safety switch 13 connected in series with the electric motor 8, and resistors r5 and r6 are built in before and after the safety switch 13 as shown in FIG. The microcomputer 15 recognizes whether the safety switch 13 is turned on or the electric motor 8 is rotated by the change in the divided voltage with the resistors R2 and R3, and controls the suction force of the electric blower 2. Here, in order to recognize the ON / OFF of the safety switch 13 and the rotation of the electric motor 8 and to reliably transmit the hand operation signal, the electric motor 8 has an OFF period of a certain time. This is because the hose 3 has a resistance component, and when a current is passed through the motor 8, a voltage drop occurs in the resistance component and the AC component is superimposed on the DC component, so that the hand operation is not normally transmitted. Because. At the same time, the situation of the suction tool 6 is recognized by the divided voltage during the OFF period. When the hand operation is performed, the microcomputer 15 transmits a signal to the motor driving means 10 so that the motor 8 operates with a small phase control signal, and the motor 8 operates with the phase-controlled voltage. Here, in the state of normal rotation, the voltage during the OFF period is V = 5 (V) * R2 / (combined resistance of R2 + R3 + r5 and r6) (for example, 2V) because there is a counter electromotive voltage. When 8 is locked by a load from the floor surface, V = 5 (V) * R2 / (R2 + R3) (for example, 2.8 V), and the voltage changes. FIG. 3 shows changes in the voltage waveform. When the microcomputer 15 recognizes this voltage change and detects lock, the phase value is changed so that the voltage becomes higher. When the load further increases and lock detection is performed, the phase value is gradually changed so that the voltage is further increased. In addition, since a heavy load can be recognized as a floor surface where dust such as carpets is difficult to collect dust, a signal is transmitted to the electric blower driving means 14 so that the suction force of the electric blower 2 is also increased. Perform the action. It is needless to say that this voltage change may be detected and controlled since it changes from the low timing of the commercial power supply 7 voltage when the rotational speed is reduced to some extent even if it is not completely locked. If the initial applied voltage of the electric motor 8 is 0 V, when not rotating, V = (5 (V) −electric motor built-in rectifying means VF) * R2 / (R2 + R3) (for example, 2.3 V) 6 is reciprocated to forcibly rotate with a load from the floor. Since a counter electromotive voltage is generated, V = 5 (V) * R2 / (R2 + R3 + r5 and r6 and combined resistance) (for example, 2 V) at the time of forward rotation, and V = 5 (V) * R2 / (R2 + R3) (for example, 2) at the time of reverse rotation. .8V), and by starting the rotation of the electric motor 8 only after detecting this, it is possible to suppress the wasteful power at the initial stage.

ここで床面の負荷が軽くなった場合に印加電圧が下げるように予め設定した時間経過後、位相を一旦落しロックするかどうかの確認を一定間隔毎に確認し、ロックがしないようであればその後も位相を落とした状態で動作を行うように動作することで、負荷が軽くなった場合には印加電圧を下げて動作を行うことができる。しかしながら電動機８の電力制御が頻繁に変わらないように印加電圧が上昇する場合にはロックを検出して上昇していくが、下げる方には制御は行わないで、電動機８の動作が床面を変えるために吸込み具６を一旦上げて動作が停止したときや、手元操作を行ったときに一旦位相電圧をリセットして初期設定から行うようにすることも容易に行える。   Here, after a preset time has passed so that the applied voltage decreases when the load on the floor becomes lighter, check whether the phase is temporarily lowered and locked at regular intervals, and if it does not lock Thereafter, the operation is performed so that the phase is lowered, so that the operation can be performed with the applied voltage lowered when the load becomes light. However, when the applied voltage rises so that the power control of the motor 8 does not change frequently, the lock is detected and rises. However, the control is not performed on the lower side, and the operation of the motor 8 is performed on the floor surface. In order to change, it is also possible to easily reset the phase voltage once from the initial setting when the operation is stopped by raising the suction tool 6 or when a hand operation is performed.

以上のように、本実施の形態においては初期状態では０Ｖまたは小さい印加電圧で電動機８を回転させておき、ロック状態での逆起電圧を検出し、徐々に印加電圧を上昇させていくことができるため、木床等の負荷が軽い床面では回転数を抑えることができ、騒音が低減され、ごみの吹き飛ばしも低減される。また床面に応じた印加電圧にて動作するため余分な電力が抑えられているだけでなく、電源電圧変動にも自動的に対応することができる。   As described above, in the present embodiment, in the initial state, the motor 8 is rotated at 0 V or a small applied voltage, the counter electromotive voltage in the locked state is detected, and the applied voltage is gradually increased. Therefore, on a floor surface with a light load such as a wooden floor, the number of rotations can be suppressed, noise is reduced, and dust blowing is also reduced. Further, since the operation is performed with the applied voltage according to the floor surface, not only the excessive power is suppressed, but also the fluctuation of the power supply voltage can be automatically dealt with.

（実施の形態２）
図４は、本発明の第２の実施の形態における回路ブロック図である。 (Embodiment 2)
FIG. 4 is a circuit block diagram according to the second embodiment of the present invention.

図４において、２０は電動機８の回転方向を切り替える回転方向切り替え手段で吸込み具６内に商用電源を整流する整流手段２１と電動機８の電流経路を切り替えるリレー２２と前記リレー２２を駆動するリレー駆動手段２３で構成されている。この整流手段２１とリレーと２２は安全スイッチ１３と電動機８の間に接続されている。ここでリレー２２の切り替えは本体１のマイクロコンピュータ１５で制御されており、本体１から吸込み具６まで信号伝達用に接続されている。その他の構成については実施の形態１と同構成あり、説明は省略する。   In FIG. 4, reference numeral 20 denotes a rotation direction switching means for switching the rotation direction of the electric motor 8, a rectifying means 21 for rectifying commercial power in the suction tool 6, a relay 22 for switching the current path of the electric motor 8, and a relay drive for driving the relay 22. The means 23 is constituted. The rectifying means 21, the relay, and 22 are connected between the safety switch 13 and the electric motor 8. Here, switching of the relay 22 is controlled by the microcomputer 15 of the main body 1, and the main body 1 to the suction tool 6 are connected for signal transmission. Other configurations are the same as those of the first embodiment, and the description thereof is omitted.

以上のように構成された電気掃除機について、以下その動作、作用を説明する。   About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

手元操作部４からの信号によって電動送風機２および電動機８を手元操作に応じた吸込み力で動作を行う。電動機８の回転方向は通常では正回転方向に回転しており自走効果によって軽い操作性を実現している。電動機８が床面からの負荷によってロックされると、マイクロコンピュータ１５がロックを検出し、位相値を電圧が高くなるように変化させる。更に負荷が大きくなってまたロック検出を行うと更に電圧が高くなるように徐々に位相値を変えていくように動作する訳であるが、ここである一定以上の位相値まで上昇すると、マイクロコンピュータ１５はリレー２２に切り替え信号を伝達し、電動機８の回転方向が逆回転に反転される。逆回転になることによって自走効果がなくなり、かきあげ力が大きくなるようになる。つまり位相が大きくなるということは負荷が重いじゅうたん上などのゴミが集塵しにくい床面であることから回転方向を反転させてかきあげ力をあげてごみを集塵しやすいように動作することでゴミの集塵効率があがる。   The electric blower 2 and the electric motor 8 are operated with a suction force corresponding to the hand operation by a signal from the hand operation unit 4. The rotation direction of the electric motor 8 normally rotates in the positive rotation direction, and light operability is realized by a self-propelled effect. When the electric motor 8 is locked by a load from the floor, the microcomputer 15 detects the lock and changes the phase value so that the voltage becomes higher. When the load is further increased and lock detection is performed, the phase value is gradually changed so as to further increase the voltage. However, when the phase value rises above a certain value, the microcomputer 15 transmits a switching signal to the relay 22, and the rotation direction of the electric motor 8 is reversed to reverse rotation. The reverse rotation eliminates the self-propelled effect and increases the scraping power. In other words, the phase increases because the floor surface is difficult for dust to collect, such as on heavy carpets, so that it reverses the direction of rotation and raises the lifting force to make it easier to collect dust. Increases dust collection efficiency.

また上記と逆に通常は逆回転方向に回転しており、負荷が重くなって操作がしにくくなったら正回転になって操作がし易くなるようにすれば、軽い操作性で掃除が行うことができる。さらに電動機８の回転方向を手元操作部４で使用者が選択できるようにすれば、速く掃除をすませたいときや、しっかり掃除を行いたいときなどの使用者の状況に応じて選択することができ、使用者の場合に応じた掃除が行えるようになる。   Also, it is normally rotating in the reverse rotation direction, and if it becomes difficult to operate due to heavy load, it should be cleaned with light operability if it becomes forward rotation and easy to operate. Can do. Further, if the user can select the rotation direction of the electric motor 8 with the hand operation unit 4, it can be selected according to the user's situation such as when the user wants to clean quickly or when the user wants to clean thoroughly. It becomes possible to perform cleaning according to the case of the user.

以上のように、本実施の形態においてはロック状態での逆起電圧を検出し、徐々に印加電圧を上昇させていき、設定された印加電圧以上になると電動機８の回転方向が変わるため、逆回転に反転させればゴミの集塵効率が上がり、正回転に反転させれば軽い操作性が実現できる。また使用者が回転方向を選択できれば使用者の状況に応じて選択することができ、使用者に合った掃除が行えるようになる。   As described above, in the present embodiment, the counter electromotive voltage in the locked state is detected, and the applied voltage is gradually increased. When the voltage exceeds the set applied voltage, the rotation direction of the motor 8 changes, Reversing the rotation increases the dust collection efficiency, and reversing it to the normal rotation realizes light operability. Further, if the user can select the rotation direction, it can be selected according to the situation of the user, and cleaning suitable for the user can be performed.

（実施の形態３）
図５は、本発明の第３の実施の形態における往復検出手段２９の構成を示す簡略図であり、図６は、本発明の第３の実施の形態における回路ブロック図である。 (Embodiment 3)
FIG. 5 is a simplified diagram showing the configuration of the reciprocating detection means 29 in the third embodiment of the present invention, and FIG. 6 is a circuit block diagram in the third embodiment of the present invention.

図５に示すように往復検出手段２９は吸込み具６内に備えており、円筒状電極３０とその両端の底面の部分には絶縁物３４、３５をはさんで円盤状電極３１、３２を配置して、その内部には導電球３３を有する構成になっている。   As shown in FIG. 5, the reciprocating detection means 29 is provided in the suction tool 6, and disk electrodes 31 and 32 are disposed between the cylindrical electrodes 30 and the bottom portions at both ends thereof with insulators 34 and 35 interposed therebetween. And it has composition which has conductive ball 33 in the inside.

回路構成は図６に示すように往復検出手段２９からの信号がマイクロコンピュータに１５に入力されるように、本体１から吸込み具６まで信号伝達用に接続されている。また往復検出手段の動作検出のために商用電源から直流電源を構成していることは言うまでもない。また往復検出手段でどちらの円盤状電極３１、３２に接しているかは抵抗ｒ７、ｒ８本体抵抗Ｒ４の分割電圧によって検知している。   As shown in FIG. 6, the circuit configuration is connected from the main body 1 to the suction tool 6 for signal transmission so that a signal from the reciprocation detecting means 29 is input to the microcomputer 15. Needless to say, a DC power source is constructed from a commercial power source for detecting the operation of the reciprocating detection means. Further, which of the disk-shaped electrodes 31 and 32 is in contact with the reciprocating detection means is detected by the divided voltage of the resistors r7 and r8 body resistor R4.

以上のように構成された電気掃除機について、以下その動作、作用を説明する。   About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

手元操作部４からの信号によって電動送風機２および電動機８を手元操作に応じた吸込み力で動作を行う。ここで吸込み具６を前方に押し出しているとき（以後前方移動）には往復検出手段２９の導電球３３は加速度によって延長管５側に移動し、延長管５側の円盤状電極３２に接触し、ｒ８とＲ４の分割電圧がマイクロコンピュータ１５に入力され、また後ろに引いているとき（以後後方移動）には導電球３３が円盤状電極３１に接触し、ｒ７とＲ４の分割電圧がマイクロコンピュータ１５に入力されることによって、前方移動しているのか後方移動しているのかが検出できる。電動機８はロック検出ととともに位相値を変え電動機８のトルクを大きくしていくように動作を行うことは実施の形態１で説明した通りであるが、そのロック検出を吸込み具６が前方移動時と後方移動時とで場合分けを行い、前方移動時にロックを検出した場合には前方移動時の位相値のみを可変し、後方移動時にロックを検出した場合には後方移動時の位相値のみを可変するように動作する。   The electric blower 2 and the electric motor 8 are operated with a suction force corresponding to the hand operation by a signal from the hand operation unit 4. Here, when the suction tool 6 is pushed forward (hereinafter referred to as forward movement), the conductive ball 33 of the reciprocating detection means 29 moves to the extension tube 5 side by acceleration and contacts the disk-like electrode 32 on the extension tube 5 side. When the divided voltage of r8 and R4 is input to the microcomputer 15 and is pulled backward (hereinafter referred to as backward movement), the conductive ball 33 contacts the disk electrode 31, and the divided voltage of r7 and R4 is the microcomputer. By being input to 15, it can be detected whether the vehicle is moving forward or backward. As described in the first embodiment, the electric motor 8 operates to change the phase value and increase the torque of the electric motor 8 together with the lock detection as described in the first embodiment, but the lock detection is performed when the suction tool 6 moves forward. When the lock is detected during the forward movement, only the phase value during the forward movement is changed.When the lock is detected during the backward movement, only the phase value during the backward movement is changed. Operates to be variable.

以上のように、本実施の形態においては前方移動時と後方移動時とで場合分けを行い、前方移動時にロックを検出した場合には前方移動時の位相値のみを可変し、後方移動時にロックを検出した場合には後方移動時の位相値のみを可変するようにすることにより、往復動作時に最適な印加電圧で動作させることができるため、騒音低減、省エネを実現することができる。   As described above, in this embodiment, the case is divided between forward movement and backward movement, and when lock is detected during forward movement, only the phase value during forward movement is changed, and the lock is applied during backward movement. By detecting only the phase value at the time of backward movement, it is possible to operate with the optimum applied voltage during the reciprocating operation, so that noise reduction and energy saving can be realized.

（実施の形態４）
図７は、本発明の第４の実施の形態における回路ブロック図である。４０はゴミ検出手段でゴミの集塵経路内に発光素子と受光素子を備え、ごみが通過して光が遮られることにより受光素子の電圧が変化し、ゴミの通過を検出するものであり、ゴミ検出手段４０からの信号はマイクロコンピュータ１５に入力されるように接続されている。 (Embodiment 4)
FIG. 7 is a circuit block diagram according to the fourth embodiment of the present invention. 40 is a dust detection means comprising a light emitting element and a light receiving element in the dust collecting path of dust, and the voltage of the light receiving element changes when dust passes and the light is blocked, and the passage of dust is detected. A signal from the dust detection means 40 is connected to be input to the microcomputer 15.

以上のように構成された電気掃除機について、以下その動作、作用を説明する。   About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

ゴミ検出手段４０からの信号はゴミの通過によってＨＩ、ＬＯＷのパルス信号がマイクロコンピュータ１５に入力される。ここで電動機８の印可電圧が小さい、負荷の小さい床面では、木床等のゴミが比較的に集塵しやすいため、ゴミ検出は掃除の初期段階は多いが、すぐにゴミが集塵され、ゴミ検出はしなくなり、ゴミがなくなったことを報知手段によってお知らせする。しかしながら電動機８の印加電圧が大きい、じゅうたんのような毛がある床面ではゴミがなくてもじゅうたんの毛がとれ、このじゅうたん毛によってゴミ検出を行ってしまい、掃除がいつまでたっても終了できないため、ゴミがあることをお知らせするゴミのカウント数を変えることでゴミ検出手段４０の感度を変えるように動作する。このゴミパルスカウント数は印加電圧によって設定されており、負荷が大きいほど大きいカウント数になっている。   As the signal from the dust detection means 40, HI and LOW pulse signals are input to the microcomputer 15 as the dust passes. Here, on the floor surface where the applied voltage of the electric motor 8 is small and the load is small, dust such as a wooden floor is relatively easy to collect. Therefore, although dust detection is often performed at the initial stage of cleaning, the dust is collected immediately. The dust detection is stopped, and the notification means notifies the user that the dust is gone. However, since the applied voltage of the motor 8 is large and the floor surface has hair like a carpet, the hair of the carpet can be removed even if there is no dust. It operates to change the sensitivity of the dust detection means 40 by changing the count number of dust to notify that there is dust. This dust pulse count number is set by the applied voltage, and the larger the load, the larger the count number.

以上のように、本実施の形態において、ゴミ検出手段４０の感度は電動機８の印加電圧によって変化するため、床面に合ったごみ検出感度で検出することができる。   As described above, in the present embodiment, since the sensitivity of the dust detection means 40 varies depending on the applied voltage of the electric motor 8, it can be detected with the dust detection sensitivity suitable for the floor surface.

以上のように、本発明にかかる電気掃除機は、ごみの取れ性は満足しつつ、木床等の負荷が軽い床面では印加電圧を下げて電動機を動作させることで、回転数を抑え、騒音が低減され、更にはごみの吹き飛ばしも低減される。また床面に応じた印加電圧にて動作するため余分な電力も抑えられる環境に優しい電気掃除機を提供できる。   As described above, the vacuum cleaner according to the present invention, while satisfying the dust removal performance, reduces the number of rotations by operating the electric motor by lowering the applied voltage on a light floor such as a wooden floor, Noise is reduced, and dust blowing is also reduced. In addition, since it operates at an applied voltage according to the floor surface, it is possible to provide an environmentally friendly vacuum cleaner that can suppress excessive power.

本発明の第１の実施の形態を示す電気掃除機の回路ブロック図The circuit block diagram of the vacuum cleaner which shows the 1st Embodiment of this invention 同、電気掃除機の外観図External view of the vacuum cleaner （ａ）同、電気掃除機の商用電源波形図（ｂ）同、電気掃除機の電動機駆動手段の位相タイミング図（ｃ）同、電気掃除機の電動機ロック検出波形図(A) Commercial power supply waveform diagram of vacuum cleaner (b) Phase timing diagram of electric motor drive means of vacuum cleaner (c) Motor lock detection waveform diagram of vacuum cleaner 本発明の第２の実施の形態を示す電気掃除機の回路ブロック図The circuit block diagram of the vacuum cleaner which shows the 2nd Embodiment of this invention （ａ）本発明の第３の実施の形態を示す往復検出手段の簡略図（ｂ）同、往復検出手段の詳細概念図（ｃ）同、往復検出手段の円筒状電極と円盤状電極の関係を示す図(A) Simplified view of reciprocating detection means showing the third embodiment of the present invention (b) Detailed conceptual view of reciprocating detection means (c) Same as above, Relationship between cylindrical electrode and disc-shaped electrode of reciprocating detection means Figure showing 同、電気掃除機の回路ブロック図The circuit block diagram of the vacuum cleaner 本発明の第４の実施の形態を示す電気掃除機の回路ブロック図The circuit block diagram of the vacuum cleaner which shows the 4th Embodiment of this invention 従来の電気掃除機の外観図External view of conventional vacuum cleaner

符号の説明Explanation of symbols

７ 回転ブラシ
８ 電動機
１０ 電動機駆動手段
１１ 逆起検出手段
２０ 回転方向切り替え手段
２９ 往復検出手段
４０ ゴミ検出手段 DESCRIPTION OF SYMBOLS 7 Rotating brush 8 Electric motor 10 Motor drive means 11 Back electromotive detection means 20 Rotation direction switching means 29 Reciprocation detection means 40 Dust detection means

Claims (9)

吸込み具に塵埃をかきあげるための回転ブラシと、前記回転ブラシを回転させる電動機と、前記電動機の印加電圧を可変する電動機駆動手段と、前記電動機の逆起電圧を検出する逆起検出手段を備え、木床等の負荷が小さいときには印加電圧を下げて動作させ、じゅうたん等の負荷変化や、使用者が前記吸込み具を床面に押し付けたり等で負荷が重くなり電動機がロック状態になると、印加電圧を上げてロックを解除して電動機を回転させることを特徴とする電気掃除機。 A rotating brush for scraping dust to the suction tool, an electric motor for rotating the rotating brush, an electric motor driving means for changing an applied voltage of the electric motor, and a counter electromotive force detecting means for detecting a counter electromotive voltage of the electric motor, When the load on the wood floor is small, the applied voltage is lowered to operate.When the load becomes heavy due to a load change on the carpet or the user pressing the suction tool against the floor, the applied voltage A vacuum cleaner characterized in that the electric motor is rotated by releasing the lock. 吸込み具に塵埃をかきあげるための回転ブラシと、前記回転ブラシを回転させる電動機と、前記電動機の印加電圧を可変する電動機駆動手段と、前記回転ブラシの逆起電圧を検出する逆起検出手段と、吸込み力を発生させる電動送風機と、前記電動送風機の吸込み力を可変する電動送風機駆動手段を備え、運転の初期段階は、電動機に印加電圧を加えない状態にし、吸込み具を前後に往復させたときの逆起電圧によって操作されたことを検出して電動機に電圧を印加させると共に電動送風機の吸込み力を上げることを特徴とする電気掃除機。 A rotating brush for scraping dust to the suction tool, an electric motor for rotating the rotating brush, an electric motor driving means for changing an applied voltage of the electric motor, a counter electromotive detecting means for detecting a counter electromotive voltage of the rotating brush, An electric blower that generates a suction force and an electric blower drive means that varies the suction force of the electric blower. When the initial stage of operation is in a state where no applied voltage is applied to the motor and the suction tool is reciprocated back and forth A vacuum cleaner characterized by detecting that it has been operated by a back electromotive force voltage, applying a voltage to the electric motor and increasing the suction force of the electric blower. 電動機の印加電圧を複数段階設け、床面および吸込み具の状態によって徐々に印加電圧を可変し、ロックしない最小印加電圧で電動機を回転させることを特徴とする請求項１または２記載の電気掃除機。 3. The electric vacuum cleaner according to claim 1 or 2, wherein the applied voltage of the electric motor is provided in a plurality of stages, the applied voltage is gradually changed according to the state of the floor surface and the suction tool, and the electric motor is rotated at the minimum applied voltage that is not locked. . 電動機の回転方向を切り替える回転方向切り替え手段を備え、通常は印加電圧を下げて正回転方向で電動機を動作させ、電動機の印加電圧が大きくなって所定の印加電圧以上になったら電動機の回転方向を逆回転に反転させることを特徴とする請求項１から３のいずれか１項記載の電気掃除機。 Rotation direction switching means for switching the rotation direction of the motor is provided.Normally, the applied voltage is lowered to operate the motor in the forward rotation direction, and when the applied voltage of the motor increases to a predetermined applied voltage or higher, the rotation direction of the motor is changed. The electric vacuum cleaner according to any one of claims 1 to 3, wherein the electric vacuum cleaner is reversely rotated. 電動機の回転方向を切り替える回転方向切り替え手段を備え、通常は印加電圧を下げて逆回転方向で電動機を動作させ、電動機の印加電圧が大きくなって所定の印加電圧以上になったら電動機の回転方向を正回転に反転させることを特徴とする請求項１から３のいずれか１項記載の電気掃除機。 Rotation direction switching means for switching the rotation direction of the motor is provided.Normally, the applied voltage is lowered to operate the motor in the reverse rotation direction, and the rotation direction of the motor is changed when the applied voltage of the motor becomes larger than a predetermined applied voltage. The electric vacuum cleaner according to any one of claims 1 to 3, wherein the electric vacuum cleaner is reversed to forward rotation. 吸込み具の往復動作を検出する往復検出手段を備え、吸込み具を前に押し出しているときと後ろに引いているときで電動機の印加電圧を可変することを特徴とする請求項１から５のいずれか１項記載の電気掃除機。 6. A reciprocating detection means for detecting a reciprocating motion of the suction tool, wherein the applied voltage of the electric motor is varied depending on whether the suction tool is pushed forward or pulled backward. A vacuum cleaner according to claim 1. 電動機の印加電圧は運転の初期段階のみ低くなっており、負荷によって徐々に上昇していくが、一旦上昇した印加電圧以下にはならず、再度スイッチ操作や吸込み具を浮かす離床など電動機の動作が設定時間以上停止したときに、リセット動作を行うことを特徴とする請求項１から６のいずれか１項記載の電気掃除機。 The applied voltage of the motor is low only in the initial stage of operation, and gradually increases with the load, but it does not fall below the applied voltage that has once increased, and the operation of the motor such as switch operation or leaving the suction tool is again performed. The electric vacuum cleaner according to any one of claims 1 to 6, wherein a reset operation is performed when the operation is stopped for a set time or longer. 集塵経路内に塵埃の通過を検出するごみ検出手段を備え、電動機を動作させている印加電圧によって床面を判断し、前記ごみ検出手段の感度を変えることを特徴とする請求項１から７のいずれか１項記載の電気掃除機。 8. A dust detection means for detecting the passage of dust in the dust collection path is provided, the floor surface is judged based on an applied voltage for operating the electric motor, and the sensitivity of the dust detection means is changed. An electric vacuum cleaner according to any one of the above. 電動機の回転方向を操作できる操作スイッチを備え、使用者が回転方向を選択できることを特徴とする請求項１から８のいずれか１項記載の電気掃除機。 The vacuum cleaner according to any one of claims 1 to 8, further comprising an operation switch capable of operating a rotation direction of the electric motor, wherein a user can select the rotation direction.

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