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JP7061007B2 - Electrical equipment - Google Patents
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JP7061007B2 - Electrical equipment - Google Patents

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JP7061007B2
JP7061007B2 JP2018081398A JP2018081398A JP7061007B2 JP 7061007 B2 JP7061007 B2 JP 7061007B2 JP 2018081398 A JP2018081398 A JP 2018081398A JP 2018081398 A JP2018081398 A JP 2018081398A JP 7061007 B2 JP7061007 B2 JP 7061007B2
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voltage
secondary battery
unit
electric
electric blower
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JP2019193368A (en
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陽介 矢嶋
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Toshiba Lifestyle Products and Services Corp
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Toshiba Lifestyle Products and Services Corp
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Priority to JP2018081398A priority Critical patent/JP7061007B2/en
Priority to CN201910303631.3A priority patent/CN110391681B/en
Publication of JP2019193368A publication Critical patent/JP2019193368A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2868—Arrangements for power supply of vacuum cleaners or the accessories thereof
    • A47L9/2884—Details of arrangements of batteries or their installation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/63—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements against overdischarge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Description

本発明の実施形態は、二次電池からの給電により動作する電動部を備えた電気機器に関する。 An embodiment of the present invention relates to an electric device including an electric unit that operates by supplying power from a secondary battery.

従来から二次電池からの放電により電動部を動作させる電気機器では、二次電池が所定の電圧に下がるまで放電したら、電動部が動作可能な電圧が未だ残っていたとしても、電動部を停止させることが一般的である。こうすることで二次電池を放電させすぎた状態（以下、「深放電」と呼ぶ）を避けて、安全性を確保したり、二次電池の劣化を抑えたりすることができる。このような二次電池の安全制御に関する技術は、電気機器の利便性との両立を図りながら、開発が進められている。 Conventionally, in an electric device that operates an electric part by discharging from a secondary battery, when the secondary battery is discharged until the voltage drops to a predetermined voltage, the electric part is stopped even if the voltage at which the electric part can operate still remains. It is common to let them do it. By doing so, it is possible to avoid a state in which the secondary battery is over-discharged (hereinafter referred to as "deep discharge"), ensure safety, and suppress deterioration of the secondary battery. Such technologies related to safety control of secondary batteries are being developed while striking a balance with the convenience of electrical equipment.

特開２００２－５１９５７号公報Japanese Unexamined Patent Publication No. 2002-51957

本発明は、電気機器における二次電池の安全制御と利便性との両立について従来の技術を改善することを目的とする。 An object of the present invention is to improve the conventional technique for achieving both safety control and convenience of a secondary battery in an electric device.

実施形態の電気機器は、電動部と、電圧検出部と、入力部と、動作開始制御部と、電圧設定部と、を有する。電動部は、二次電池からの給電により動作する。電圧検出手段は、二次電池の電圧を検出する。入力部は、電動部の動作開始について外部からの指示を入力する。動作開始制御部は、二次電池の電圧が所定電圧より大きいときに外部からの指示が入力部により入力されると、電動部が動作開始するよう制御する。電圧設定部は、電動部の動作終了時における二次電池の電圧の変化量に基づいて所定電圧を設定する。電圧設定部は、電動部の動作停止のタイミングでの第１の電圧と、この停止から所定時間後の第２の電圧と、の差を変化量とする。または、電圧設定部は、電動部の動作開始時における二次電池の電圧の変化量に基づいて所定電圧を設定する。電圧設定部は、電動部の動作開始の直前のタイミングでの二次電池の第１の電圧と、この動作開始から所定時間後の二次電池の第２の電圧と、の差を変化量とする。 The electrical device of the embodiment includes an electric unit, a voltage detection unit, an input unit, an operation start control unit, and a voltage setting unit. The electric unit operates by supplying power from a secondary battery. The voltage detecting means detects the voltage of the secondary battery. The input unit inputs an external instruction regarding the start of operation of the electric unit. The operation start control unit controls the electric unit to start operation when an external instruction is input from the input unit when the voltage of the secondary battery is larger than the predetermined voltage. The voltage setting unit sets a predetermined voltage based on the amount of change in the voltage of the secondary battery at the end of the operation of the electric unit . The voltage setting unit uses the difference between the first voltage at the timing when the operation of the electric unit is stopped and the second voltage after a predetermined time from this stop as the amount of change. Alternatively, the voltage setting unit sets a predetermined voltage based on the amount of change in the voltage of the secondary battery at the start of operation of the electric unit. The voltage setting unit uses the difference between the first voltage of the secondary battery at the timing immediately before the start of operation of the electric unit and the second voltage of the secondary battery after a predetermined time from the start of operation as the amount of change. To do .

第１の実施形態の電気機器の斜視図である。It is a perspective view of the electric apparatus of 1st Embodiment . 同上電気機器を示す回路ブロック図である。 Same as above It is a circuit block diagram showing an electric device. 同上電気機器の二次電池の電圧と時間との関係の一例を示すグラフである。Same as above It is a graph which shows an example of the relationship between the voltage and time of the secondary battery of an electric device. 同上電気機器の制御を示すフローチャートである。Same as above It is a flowchart which shows the control of an electric device. 第２の実施形態の電気機器の制御を示すフローチャートである。It is a flowchart which shows the control of the electric apparatus of 2nd Embodiment.

以下、第１の実施形態の構成を、図面を参照して説明する。 Hereinafter, the configuration of the first embodiment will be described with reference to the drawings.

図１において、11は電気機器としての電気掃除機を示す。この電気掃除機11は、本実施形態において、電気機器本体としての掃除機本体15と、この掃除機本体15に接続された長尺状の風路体16とを備えた、いわゆるスティック型のコードレス電気掃除機である。 In FIG. 1, 11 shows a vacuum cleaner as an electric device. In the present embodiment, the vacuum cleaner 11 is a so-called stick-type cordless body including a vacuum cleaner main body 15 as an electric device main body and a long air passage body 16 connected to the vacuum cleaner main body 15. It is an electric vacuum cleaner.

また、この電気掃除機11は、集塵部22を備えている。さらに、この電気掃除機11は、電動部である電動送風機23を備えている。また、電気掃除機11は、制御手段としての制御部24を備えている。さらに、この電気掃除機11は、電源部としての二次電池25を備えている。また、この電気掃除機11は、電動送風機23などの動作開始について外部からの指示が入力される設定部としての設定ボタン26を備えている。さらに、この電気掃除機11は、二次電池25の充電用の図示しない端子を備えている。また、この電気掃除機11は、図２に示すように、電圧検出手段としての電圧検出部28を備えている。さらに、この電気掃除機11は、温度検出手段としての温度検出部29を備えている。 Further, the vacuum cleaner 11 includes a dust collecting unit 22. Further, the vacuum cleaner 11 includes an electric blower 23 which is an electric unit. Further, the vacuum cleaner 11 includes a control unit 24 as a control means. Further, the vacuum cleaner 11 includes a secondary battery 25 as a power supply unit. Further, the vacuum cleaner 11 includes a setting button 26 as a setting unit for inputting an external instruction regarding the start of operation of the electric blower 23 and the like. Further, the vacuum cleaner 11 includes a terminal (not shown) for charging the secondary battery 25. Further, as shown in FIG. 2, the vacuum cleaner 11 includes a voltage detecting unit 28 as a voltage detecting means. Further, the vacuum cleaner 11 includes a temperature detecting unit 29 as a temperature detecting means.

図１に示す集塵部22は、含塵空気から塵埃を分離して捕集するものである。この集塵部22は、例えば掃除機本体15に設けられている。例えば、この集塵部22は、集塵カップなどの集塵装置でもよいし、フィルタや紙パックなどでもよい。 The dust collecting unit 22 shown in FIG. 1 separates and collects dust from dust-containing air. The dust collecting unit 22 is provided in, for example, the vacuum cleaner main body 15. For example, the dust collecting unit 22 may be a dust collecting device such as a dust collecting cup, or may be a filter, a paper pack, or the like.

電動送風機23は、電動機によりファンを回転させることで負圧を生じさせ、含塵空気を集塵部22へと吸い込むものである。この電動送風機23は、掃除機本体15に収容されている。 The electric blower 23 generates a negative pressure by rotating a fan by an electric motor, and sucks dust-containing air into the dust collecting unit 22. The electric blower 23 is housed in the vacuum cleaner main body 15.

制御部24は、例えばマイコンなどを備えた制御基板である。この制御部24は、設定ボタン26により設定された動作状態、例えば強モード、弱モード、停止などに電動送風機23を設定するものである。すなわち、この制御部24は、二次電池25から電動送風機23への通電量を制御するものである。本実施形態では、例えばこの制御部24は、図２に示すように、二次電池25から電動送風機23への通電のオンオフを切り換えるスイッチ素子などの素子31のオンオフを切り換えることで、二次電池25から電動送風機23への通電量を制御する。そして、この制御部24は、電動送風機23に供給される電流の大きさを変えることで、各動作状態に対応するように電動送風機23の出力を調整する。また、この制御部24は、電動送風機23の動作モードのそれぞれにおいて、電動送風機23を所定の動作電流となるように定電流制御している。すなわち、この制御部24には、例えば各動作モードのそれぞれに対応した動作電流が設定されている。例えば、強モードの場合には、１４Ａが設定され、弱モードの場合には、３Ａが設定されている。これら動作電流は、二次電池24の充電状態に応じて変えることもできる。 The control unit 24 is a control board provided with, for example, a microcomputer. The control unit 24 sets the electric blower 23 to an operating state set by the setting button 26, for example, a strong mode, a weak mode, a stop, and the like. That is, the control unit 24 controls the amount of electricity supplied from the secondary battery 25 to the electric blower 23. In the present embodiment, for example, as shown in FIG. 2, the control unit 24 switches on / off of an element 31 such as a switch element for switching on / off of energization from the secondary battery 25 to the electric blower 23, thereby switching the secondary battery. Controls the amount of electricity supplied from 25 to the electric blower 23. Then, the control unit 24 adjusts the output of the electric blower 23 so as to correspond to each operating state by changing the magnitude of the current supplied to the electric blower 23. Further, the control unit 24 constantly controls the electric blower 23 so as to have a predetermined operating current in each of the operation modes of the electric blower 23. That is, for example, an operating current corresponding to each operating mode is set in the control unit 24. For example, in the strong mode, 14A is set, and in the weak mode, 3A is set. These operating currents can also be changed according to the state of charge of the secondary battery 24.

さらに、この制御部24は、二次電池25から生成された例えば５Ｖなどの所定の電源32から給電される。すなわち、この制御部24は、二次電池25を電源としている。そして、この制御部24は、掃除機本体15に収容されている。 Further, the control unit 24 is supplied with power from a predetermined power source 32 such as 5V generated from the secondary battery 25. That is, the control unit 24 uses the secondary battery 25 as a power source. The control unit 24 is housed in the vacuum cleaner main body 15.

二次電池25は、例えば複数の電池セルを有する電池パックである。この二次電池25としては、例えばリチウムイオン電池やニッケル水素電池などが用いられる。また、この二次電池25は、掃除機本体15に収容されている。さらに、この二次電池25は、電動送風機23の排気により冷却される位置に配置されている。 The secondary battery 25 is, for example, a battery pack having a plurality of battery cells. As the secondary battery 25, for example, a lithium ion battery, a nickel hydrogen battery, or the like is used. Further, the secondary battery 25 is housed in the vacuum cleaner main body 15. Further, the secondary battery 25 is arranged at a position where it is cooled by the exhaust gas of the electric blower 23.

設定ボタン26は、ユーザの操作により、電動送風機23の動作モードなどを設定するものである。本実施形態において、例えばこの設定ボタン26は、図１に示すように、把持部としてのハンドル33に配置されている。このハンドル33は、例えば掃除機本体15に設けられている。 The setting button 26 sets the operation mode of the electric blower 23 and the like by the user's operation. In the present embodiment, for example, the setting button 26 is arranged on the handle 33 as a grip portion as shown in FIG. The handle 33 is provided on, for example, the vacuum cleaner main body 15.

端子は、二次電池25の充電用の図示しない充電手段(充電体)と電気的に接続されるものである。充電手段としては、例えば収納台としての機能を有する充電装置(充電台)や収納台としての機能を有さないＡＣアダプタなどが用いられる。すなわち、充電手段側に充電回路を備えていてもよいし、電気掃除機11に予め充電回路が備えられていて充電手段からの給電により充電回路を介して二次電池25を充電してもよい。 The terminal is electrically connected to a charging means (charger) for charging the secondary battery 25 (not shown). As the charging means, for example, a charging device (charging stand) having a function as a storage stand, an AC adapter having no function as a storage stand, or the like is used. That is, the charging means may be provided with a charging circuit, or the vacuum cleaner 11 may be provided with a charging circuit in advance and the secondary battery 25 may be charged via the charging circuit by power supply from the charging means. ..

図２に示す電圧検出部28は、二次電池25の電圧を検出するものである。この電圧検出部28は、二次電池25の電圧値を直接的に検出してもよいし、電圧値に対応する他の指標を検出するなど、間接的に検出してもよい。この電圧検出部28は、例えば掃除機本体15に収容されている。 The voltage detection unit 28 shown in FIG. 2 detects the voltage of the secondary battery 25. The voltage detection unit 28 may directly detect the voltage value of the secondary battery 25, or may indirectly detect it, such as by detecting another index corresponding to the voltage value. The voltage detection unit 28 is housed in, for example, the vacuum cleaner main body 15.

温度検出部29は、二次電池25の温度を検出するものである。この温度検出部29は、二次電池25の温度を直接的、又は、間接的に検出している。この温度検出部29は、例えば掃除機本体15に収容されている。 The temperature detection unit 29 detects the temperature of the secondary battery 25. The temperature detection unit 29 directly or indirectly detects the temperature of the secondary battery 25. The temperature detection unit 29 is housed in, for example, the vacuum cleaner main body 15.

そして、電圧検出部28および温度検出部29は、二次電池25に組み込まれていてもよいし、二次電池25とは別個に備えられていてもよい。 The voltage detection unit 28 and the temperature detection unit 29 may be incorporated in the secondary battery 25 or may be provided separately from the secondary battery 25.

図１に示す風路体16は、内部に風路を区画し、掃除機本体15に接続された状態で電動送風機23の吸込側と連通する。この風路体16は、長尺状の延長管35を備えている。また、この風路体16は、吸込口体36を先端側である上流側に備えていてもよい。この吸込口体36としては、任意のものを用いることができるが、本実施形態では例えば床ブラシが用いられる。そして、風路体16は、全体として略直線状に形成されている。 The air passage body 16 shown in FIG. 1 has an internal air passage, and communicates with the suction side of the electric blower 23 in a state of being connected to the vacuum cleaner main body 15. The air passage body 16 is provided with an elongated extension pipe 35. Further, the air passage body 16 may be provided with the suction port body 36 on the upstream side, which is the tip side. Any one can be used as the suction port body 36, but in the present embodiment, for example, a floor brush is used. The air passage body 16 is formed in a substantially linear shape as a whole.

なお、電気掃除機11は、風路体16を取り外して掃除機本体15のみで使用することにより、ハンディ型又は携帯型の電気掃除機として用いることもできる。 The vacuum cleaner 11 can also be used as a handheld or portable vacuum cleaner by removing the air passage body 16 and using it only with the vacuum cleaner main body 15.

次に、上記第１の実施形態の動作を説明する。 Next, the operation of the first embodiment will be described.

電気掃除機11は、二次電池25が充分に充電されて正常使用可能な状態で、設定ボタン26の操作に応じて制御部24が素子31のオンオフを制御することで電動送風機23への二次電池25からの通電量を制御し、電動送風機23が動作する。電気掃除機11は、電動送風機23の動作により発生した負圧によって、床面上の塵埃を空気とともに吸い込む。ユーザは、ハンドル33を把持し、吸込口体36を床面上で前後などに移動させることで、吸込口体36を介して集塵部22へと塵埃を吸い込む。集塵部22では、吸い込まれた含塵空気から塵埃を分離して捕集する。塵埃が分離された空気は、電動送風機23に吸い込まれてこの電動送風機23を冷却した後、掃除機本体15から排気される。そして、掃除が終了すると、ユーザが設定ボタン26により停止を指示することで、制御部24が電動送風機23への二次電池25からの通電量を低下させて、電動送風機23を停止させる。 In the electric vacuum cleaner 11, the control unit 24 controls the on / off of the element 31 according to the operation of the setting button 26 in a state where the secondary battery 25 is sufficiently charged and can be used normally. The electric blower 23 operates by controlling the amount of electricity supplied from the next battery 25. The vacuum cleaner 11 sucks dust on the floor surface together with air by the negative pressure generated by the operation of the electric blower 23. The user grasps the handle 33 and moves the suction port body 36 back and forth on the floor surface to suck dust into the dust collecting portion 22 through the suction port body 36. The dust collecting unit 22 separates and collects dust from the sucked dust-containing air. The air from which the dust has been separated is sucked into the electric blower 23 to cool the electric blower 23, and then exhausted from the vacuum cleaner main body 15. Then, when the cleaning is completed, the user instructs the stop by the setting button 26, and the control unit 24 reduces the amount of electricity supplied to the electric blower 23 from the secondary battery 25 to stop the electric blower 23.

本実施形態において、制御部24は、二次電池25の電圧および温度を、電圧検出部28および温度検出部29を介して監視している。すなわち、制御部24は、電圧検出部28および温度検出部29から出力される情報に基づいて二次電池25の電圧Ｖ、および、二次電池25の温度Ｔなどを監視している。 In the present embodiment, the control unit 24 monitors the voltage and temperature of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29. That is, the control unit 24 monitors the voltage V of the secondary battery 25, the temperature T of the secondary battery 25, and the like based on the information output from the voltage detection unit 28 and the temperature detection unit 29.

そして、この制御部24は、電動送風機23の動作により二次電池25の電圧Ｖが徐々に低下して第１の電圧V1以下となったとき(図３の実線に一例を示す)には、電動送風機23の動作を強制的に停止する。また、この制御部24は、動作開始時の二次電池25の電圧Ｖが所定電圧である第２の電圧V2より大きいときに設定ボタン26により動作開始について外部から指示が入力されると、電動送風機23が動作開始するように制御する、動作開始制御部である。つまり、本実施形態の制御部24は、二次電池25の電圧Ｖが第２の電圧V2以下であるときは、電動送風機23の動作開始を制限する。例えば、図３の二点鎖線に一例を示すように二次電池25が充電される場合、制御部24は、図３中の時間t1まで電動送風機23の動作を開始させない。このようにすることで、二次電池25の電圧Ｖが低い状態で電気掃除機11が繰り返し再起動されて二次電池25が放電させすぎた状態、つまり深放電状態となることを防止し、二次電池25の寿命低下を防止する。 Then, when the voltage V of the secondary battery 25 gradually decreases to the first voltage V1 or less due to the operation of the electric blower 23 (an example is shown by the solid line in FIG. 3), the control unit 24 is used. The operation of the electric blower 23 is forcibly stopped. Further, when the voltage V of the secondary battery 25 at the start of operation is larger than the second voltage V2 which is a predetermined voltage, the control unit 24 is electrically operated when an external instruction for starting operation is input by the setting button 26. It is an operation start control unit that controls the blower 23 to start the operation. That is, the control unit 24 of the present embodiment limits the start of operation of the electric blower 23 when the voltage V of the secondary battery 25 is equal to or less than the second voltage V2. For example, when the secondary battery 25 is charged as shown by the two-dot chain line in FIG. 3, the control unit 24 does not start the operation of the electric blower 23 until the time t1 in FIG. By doing so, it is possible to prevent the electric vacuum cleaner 11 from being repeatedly restarted in a state where the voltage V of the secondary battery 25 is low, so that the secondary battery 25 is discharged too much, that is, a deep discharge state. Prevents the life of the secondary battery 25 from being shortened.

第１の電圧V1は、二次電池25の放電終止電圧よりも高い電圧である。また、この第１の電圧V1は、例えば放電終止電圧に近い低電圧とすることができる。また、第２の電圧V2は、第１の電圧V1よりも高く、かつ、二次電池25の満充電状態での電圧よりも低い電圧である。 The first voltage V1 is a voltage higher than the discharge end voltage of the secondary battery 25. Further, the first voltage V1 can be, for example, a low voltage close to the discharge end voltage. Further, the second voltage V2 is higher than the first voltage V1 and lower than the voltage in the fully charged state of the secondary battery 25.

また、制御部24は、本実施形態において、電動送風機23の動作終了時における二次電池25の電圧の差すなわち変化量Δに応じて上記の第２の電圧V2を設定する、電圧設定部である。すなわち、二次電池25は、電動送風機23に対して電流が流れている状態と比較して、電動送風機23に対して電流が流れていない状態では内部抵抗に応じて電圧が高いことを利用し(図３に一例を示す)、制御部24では、これら電圧の差分から二次電池25の内部抵抗を想定し、この内部抵抗に基づいて第２の電圧V2を設定する。 Further, in the present embodiment, the control unit 24 is a voltage setting unit that sets the above-mentioned second voltage V2 according to the difference in voltage of the secondary battery 25 at the end of the operation of the electric blower 23, that is, the amount of change Δ. be. That is, the secondary battery 25 utilizes the fact that the voltage is higher according to the internal resistance in the state where the current is not flowing through the electric blower 23 as compared with the state where the current is flowing through the electric blower 23. (An example is shown in FIG. 3), the control unit 24 assumes the internal resistance of the secondary battery 25 from the difference between these voltages, and sets the second voltage V2 based on this internal resistance.

具体的に、制御部24は、電気掃除機11の運転停止、すなわち電動送風機23の停止が設定ボタン26により指示された場合、あるいは、二次電池25の電圧Ｖが第１の電圧V1以下となって電動送風機23を強制的に停止させた場合、すなわち、電動送風機23の動作停止のタイミングで、電圧検出部28により検出された二次電池25の電圧Ｖを保持する(電圧Va)。この電圧Vaは、電動送風機23に対し電流が流れている状態での電圧となる。さらに、この停止から所定時間、例えば数秒後、制御部24は、電圧検出部28により検出された二次電池25の電圧Ｖを読み取る(電圧Vp)。この電圧Vpは、電動送風機23に対し電流が流れていない状態での電圧となる。次いで、制御部24は、電圧Vaと電圧Vpとの差(Vp－Va)を算出し、その算出値を変化量Δとする。そして、制御部24は、変化量Δに応じて第２の電圧V2を設定する。 Specifically, the control unit 24 determines that the operation of the vacuum cleaner 11, that is, the stop of the electric blower 23 is instructed by the setting button 26, or the voltage V of the secondary battery 25 is the first voltage V1 or less. When the electric blower 23 is forcibly stopped, that is, at the timing when the operation of the electric blower 23 is stopped, the voltage V of the secondary battery 25 detected by the voltage detection unit 28 is held (voltage Va). This voltage Va is a voltage in a state where a current is flowing through the electric blower 23. Further, after a predetermined time, for example, a few seconds from this stop, the control unit 24 reads the voltage V of the secondary battery 25 detected by the voltage detection unit 28 (voltage Vp). This voltage Vp is a voltage in a state where no current is flowing through the electric blower 23. Next, the control unit 24 calculates the difference (Vp−Va) between the voltage Va and the voltage Vp, and sets the calculated value as the change amount Δ. Then, the control unit 24 sets the second voltage V2 according to the amount of change Δ.

さらに、第２の電圧V2の設定については、温度検出部29により検出した電動送風機23の動作終了時の二次電池25の温度Ｔを加味してもよい。また、制御部24は、変化量Δに応じて、電動送風機23の動作電流を低下させてもよい。これらの制御については後述する。 Further, regarding the setting of the second voltage V2, the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23 detected by the temperature detection unit 29 may be added. Further, the control unit 24 may reduce the operating current of the electric blower 23 according to the amount of change Δ. These controls will be described later.

次に、上記の動作を、図４に示すフローチャートも参照しながらより詳細に説明する。 Next, the above operation will be described in more detail with reference to the flowchart shown in FIG.

制御部24は、電圧検出部28および温度検出部29を介して二次電池25の電圧Ｖ、温度Ｔを取得するとともに、設定ボタン26からの出力を取得する(ステップS1)。 The control unit 24 acquires the voltage V and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and also acquires the output from the setting button 26 (step S1).

次いで、制御部24は、設定ボタン26から動作要求が出力されているか否かを判断する(ステップS2)。このステップS2において、動作要求が出力されていないと判断した場合には、ステップS1に戻る。一方、このステップS2において、動作要求が出力されていると判断した場合には、制御部24は、二次電池25の電圧Ｖが第２の電圧V2より大きい(Ｖ＞V2)か否かを判断する(ステップS3)。このステップS3において、電圧Ｖが第２の電圧V2より大きくない(Ｖ≦V2)と判断した場合には、ステップS1に戻る。一方、このステップS3において、電圧Ｖが第２の電圧V2より大きい(Ｖ＞V2)と判断した場合には、制御部24が電動送風機23の動作電流を設定する(ステップS4)。 Next, the control unit 24 determines whether or not an operation request is output from the setting button 26 (step S2). If it is determined in step S2 that no operation request has been output, the process returns to step S1. On the other hand, when it is determined in this step S2 that the operation request is output, the control unit 24 determines whether or not the voltage V of the secondary battery 25 is larger than the second voltage V2 (V> V2). Determine (step S3). If it is determined in step S3 that the voltage V is not larger than the second voltage V2 (V ≦ V2), the process returns to step S1. On the other hand, if it is determined in step S3 that the voltage V is larger than the second voltage V2 (V> V2), the control unit 24 sets the operating current of the electric blower 23 (step S4).

このステップS4において、制御部24は、電動送風機23の動作電流を設定する。この動作電流は、動作モードに応じた電流となるように設定するが、二次電池25の電圧Ｖすなわち放電容量又は残量によっては、前回の使用時に測定した変化量Δに応じて低下させてもよい。すなわち、変化量Δが大きい場合、電動送風機23の動作電流が大きいと、大きい電圧降下が生じる。そのため、変化量Δに応じて、電動送風機23の動作電流を低下させることで、電圧降下を抑制し、例えば二次電池25の電圧Ｖが第２の電圧V2に近い状態で電動送風機23を動作させた場合などの深放電を抑制又は防止してもよい。二次電池25の放電容量は、例えば二次電池25の電圧Ｖと放電容量との対応を示す予め記憶されたデータ又はテーブルに基づき予測してもよい。この場合、例えば電動送風機23の動作開始直前の二次電池25の電圧Ｖと変化量Δとに応じて、動作電流を可変設定してもよいし、予め設定された動作電流に切り換えるようにしてもよい。このとき、例えば電動送風機23の動作電流が異なる複数の動作モードがある場合には、少なくとも相対的に動作電流が大きい動作モードでの動作電流を低下させてもよいし、相対的に電流が小さい動作モードでの動作のみを許可し、相対的に電流が大きい動作モードでの動作を制限するようにしてもよい。また、動作モードに拘らず、動作電流を低下させてもよい。なお、このように電動送風機23の動作電流を低下させた場合には、例えば二次電池25が満充電となったときなど、二次電池25が第２の電圧V2よりも大きい所定の第３の電圧になった場合に、電動送風機23の動作電流の低下を解除する制御をしてもよい。 In step S4, the control unit 24 sets the operating current of the electric blower 23. This operating current is set to be a current according to the operating mode, but depending on the voltage V of the secondary battery 25, that is, the discharge capacity or the remaining amount, it is reduced according to the amount of change Δ measured at the time of the previous use. May be good. That is, when the amount of change Δ is large and the operating current of the electric blower 23 is large, a large voltage drop occurs. Therefore, by reducing the operating current of the electric blower 23 according to the amount of change Δ, the voltage drop is suppressed, and for example, the electric blower 23 is operated in a state where the voltage V of the secondary battery 25 is close to the second voltage V2. You may suppress or prevent the deep discharge when it is made to do so. The discharge capacity of the secondary battery 25 may be predicted, for example, based on pre-stored data or a table showing the correspondence between the voltage V of the secondary battery 25 and the discharge capacity. In this case, for example, the operating current may be variably set according to the voltage V of the secondary battery 25 immediately before the start of operation of the electric blower 23 and the amount of change Δ, or the operating current may be switched to a preset operating current. May be good. At this time, for example, when there are a plurality of operating modes in which the operating currents of the electric blower 23 are different, at least the operating current in the operating mode in which the operating current is relatively large may be reduced, or the current may be relatively small. Only the operation in the operation mode may be permitted, and the operation in the operation mode in which the current is relatively large may be restricted. Further, the operating current may be reduced regardless of the operating mode. When the operating current of the electric blower 23 is reduced in this way, the secondary battery 25 is larger than the second voltage V2, for example, when the secondary battery 25 is fully charged. When the voltage reaches the above voltage, control may be performed to cancel the decrease in the operating current of the electric blower 23.

そして、制御部24は、ステップS4で設定した動作電流となるように素子31のオンオフを切り換えて電動送風機23を動作させる(ステップS5)。 Then, the control unit 24 switches the element 31 on and off so as to have the operating current set in step S4, and operates the electric blower 23 (step S5).

次いで、制御部24は、電圧検出部28および温度検出部29を介して二次電池25の電圧Ｖ、温度Ｔを取得するとともに、設定ボタン26から動作要求を取得する(ステップS6)。 Next, the control unit 24 acquires the voltage V and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and also acquires an operation request from the setting button 26 (step S6).

さらに、制御部24は、設定ボタン26から動作モードの切り換え要求が出力されているか否かを判断する(ステップS7)。このステップS7において、動作モードの切り換え要求が出力されていると判断した場合には、ステップS4に戻る。一方、このステップS7において、動作モードの切り換え要求が出力されていないと判断した場合には、制御部24は、設定ボタン26から停止要求が出力されているか否かを判断する(ステップS8)。 Further, the control unit 24 determines whether or not the operation mode switching request is output from the setting button 26 (step S7). If it is determined in step S7 that the operation mode switching request has been output, the process returns to step S4. On the other hand, if it is determined in step S7 that the operation mode switching request has not been output, the control unit 24 determines whether or not the stop request has been output from the setting button 26 (step S8).

このステップS8において、停止要求が出力されていると判断した場合には、制御部24は、二次電池25の電圧Ｖを保持し(電圧Va)、電動送風機23を停止させ(ステップS9)、後述するステップS11に進む。一方、このステップS8において、停止要求が出力されていないと判断した場合には、制御部24は、二次電池25の電圧Ｖが第１の電圧V1未満(Ｖ＜V1)であるか否かを判断する(ステップS10)。このステップS10において、電圧Ｖが第１の電圧V1未満でない(Ｖ≧V1)と判断した場合には、ステップS6に戻る。一方、このステップS10において、電圧Ｖが第１の電圧V1未満である(Ｖ＜V1)と判断した場合には、ステップS9に進む。 If it is determined in step S8 that a stop request has been output, the control unit 24 holds the voltage V of the secondary battery 25 (voltage Va), stops the electric blower 23 (step S9), and stops the electric blower 23. The process proceeds to step S11 described later. On the other hand, if it is determined in step S8 that the stop request has not been output, the control unit 24 determines whether or not the voltage V of the secondary battery 25 is less than the first voltage V1 (V <V1). Is determined (step S10). If it is determined in step S10 that the voltage V is not less than the first voltage V1 (V ≧ V1), the process returns to step S6. On the other hand, if it is determined in step S10 that the voltage V is less than the first voltage V1 (V <V1), the process proceeds to step S9.

次いで、制御部24は、電動送風機23の停止から所定時間が経過したか否かを判断する(ステップS11)。このステップS11において、所定時間が経過していないと判断した場合には、ステップS11を繰り返す。一方、このステップS11において、所定時間が経過したと判断した場合には、制御部24は、電圧検出部28および温度検出部29を介して二次電池25の電圧Ｖ(電圧Vp)、および、温度Ｔを取得する(ステップS12)。 Next, the control unit 24 determines whether or not a predetermined time has elapsed from the stop of the electric blower 23 (step S11). If it is determined in step S11 that the predetermined time has not elapsed, step S11 is repeated. On the other hand, when it is determined in step S11 that the predetermined time has elapsed, the control unit 24 determines that the voltage V (voltage Vp) of the secondary battery 25 and the voltage V (voltage Vp) of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29. Acquire the temperature T (step S12).

そして、制御部24は、電圧Vaと電圧Vpとの差(Vp－Va)、すなわち変化量Δに応じて第２の電圧V2を設定する(ステップS13)。したがって、本実施形態において、制御部24は、電気掃除機11の運転、すなわち電動送風機23の動作が停止する度に変化量Δを算出する。このステップS13の後、ステップS1に戻る。 Then, the control unit 24 sets the second voltage V2 according to the difference (Vp−Va) between the voltage Va and the voltage Vp, that is, the amount of change Δ (step S13). Therefore, in the present embodiment, the control unit 24 calculates the amount of change Δ each time the operation of the vacuum cleaner 11, that is, the operation of the electric blower 23 is stopped. After this step S13, the process returns to step S1.

このステップS13において、第２の電圧V2は、例えば変化量Δが相対的に大きいと判断した場合、相対的に大きく設定し、変化量Δが相対的に小さいと判断した場合、相対的に小さく設定する。なお、ステップS13においては、変化量Δに代えて、この変化量Δに対応して例えばオームの法則に基づき算出される、又は、予め記憶された変化量Δに対応するテーブルなどを用いて算出される二次電池25の内部抵抗に基づいて判断してもよい。この場合には、電動送風機23に流れる電流が必要になる。この電流は、電動送風機23の停止直前の動作状態での電流とする。すなわち、電動送風機23に複数の動作モードがある場合には、これら動作モードに応じて電動送風機23に流れる電流が異なり、また、電動送風機23が、床面の塵埃量などに応じて電流を可変させる自動モードの場合には、検出タイミングによって電動送風機23に流れる電流が異なるから、制御部24は、二次電池25の電圧Vaと電圧Vpとの差すなわち変化量Δと、この変化量Δを検出したときの電動送風機23の電流とに基づき第２の電圧V2を設定する。したがって、本実施形態において、第２の電圧V2の設定には、動作停止直前の電動送風機23の電流を考慮に入れてもよい。 In this step S13, for example, the second voltage V2 is set relatively large when it is determined that the amount of change Δ is relatively large, and relatively small when it is determined that the amount of change Δ is relatively small. Set. In step S13, instead of the change amount Δ, it is calculated according to this change amount Δ, for example, based on Ohm's law, or it is calculated using a table corresponding to the change amount Δ stored in advance. The judgment may be made based on the internal resistance of the secondary battery 25. In this case, the current flowing through the electric blower 23 is required. This current is the current in the operating state immediately before the electric blower 23 is stopped. That is, when the electric blower 23 has a plurality of operation modes, the current flowing through the electric blower 23 differs according to these operation modes, and the electric blower 23 changes the current according to the amount of dust on the floor surface and the like. In the case of the automatic mode, the current flowing through the electric blower 23 differs depending on the detection timing, so the control unit 24 determines the difference between the voltage Va and the voltage Vp of the secondary battery 25, that is, the amount of change Δ, and the amount of change Δ. The second voltage V2 is set based on the current of the electric blower 23 at the time of detection. Therefore, in the present embodiment, the current of the electric blower 23 immediately before the operation is stopped may be taken into consideration in the setting of the second voltage V2.

そして、この第２の電圧V2は、例えば変化量Δと比例するように設定してもよい。また、第２の電圧V2は、例えば所定の基準電圧に対して、変化量Δと比例する電圧を加算又は減算して設定してもよい。さらに、第２の電圧V2は、基準電圧に対して変化量Δに応じた重み付けをしてもよい。また、変化量Δの大きさに応じて予め設定された数種類の電圧から第２の電圧V2を選択してもよい。このとき、例えば変化量Δが所定以下、又は所定以上の場合には第２の電圧V2を固定し、所定より大きい、又は所定未満の場合にのみ第２の電圧V2を可変させてもよい。 Then, the second voltage V2 may be set so as to be proportional to, for example, the amount of change Δ. Further, the second voltage V2 may be set by adding or subtracting a voltage proportional to the amount of change Δ with respect to a predetermined reference voltage, for example. Further, the second voltage V2 may be weighted according to the amount of change Δ with respect to the reference voltage. Further, the second voltage V2 may be selected from several types of voltages set in advance according to the magnitude of the amount of change Δ. At this time, for example, when the amount of change Δ is less than or equal to a predetermined value or more than a predetermined value, the second voltage V2 may be fixed, and the second voltage V2 may be changed only when the amount of change is larger than or less than the predetermined value.

また、二次電池25の電圧Ｖと放電容量との対応を示す予め記憶されたデータに基づき二次電池放25の放電容量又は残量を予測し、この予測に応じて第２の電圧V2を補正してもよい。 Further, the discharge capacity or the remaining amount of the secondary battery release 25 is predicted based on the data stored in advance indicating the correspondence between the voltage V of the secondary battery 25 and the discharge capacity, and the second voltage V2 is calculated according to this prediction. It may be corrected.

さらに、第２の電圧V2の設定については、温度検出部29により検出した電動送風機23の動作終了時の二次電池25の温度Ｔを加味してもよい。すなわち、環境温度が高い場合や電動送風機23の動作停止直後など、二次電池25の温度Ｔが高い場合、相対的に内部抵抗は小さくなり、環境温度が低い場合や電動送風機23の動作停止から時間が経過しているときなど、二次電池25の温度Ｔが低い場合、相対的に内部抵抗は大きくなるから、例えばこの温度に応じて、電圧Ｖの差つまり変化量Δや内部抵抗、あるいは第２の電圧V2を補正してもよい。具体的に、温度Ｔが大きいほど二次電池25の内部抵抗が小さくなることから、温度Ｔが相対的に大きいときに電圧Ｖの差や内部抵抗を相対的に大きく、すなわち第２の電圧V2が高くなるように補正する。この補正は、例えば温度と比例するように設定してもよいし、温度に応じて重み付けをしてもよいし、温度の高さに応じて予め設定された数種類から選択してもよいし、温度Ｔが所定以下、又は所定以上の場合には第２の電圧V2を補正せず、所定より大きい、又は所定未満の場合にのみ第２の電圧V2を補正してもよい。 Further, regarding the setting of the second voltage V2, the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23 detected by the temperature detection unit 29 may be added. That is, when the temperature T of the secondary battery 25 is high, such as when the environmental temperature is high or immediately after the operation of the electric blower 23 is stopped, the internal resistance becomes relatively small, and when the environmental temperature is low or when the operation of the electric blower 23 is stopped. When the temperature T of the secondary battery 25 is low, such as when time has passed, the internal resistance becomes relatively large. Therefore, for example, depending on this temperature, the difference in voltage V, that is, the amount of change Δ or the internal resistance, or The second voltage V2 may be corrected. Specifically, since the internal resistance of the secondary battery 25 decreases as the temperature T increases, the difference in voltage V and the internal resistance become relatively large when the temperature T is relatively large, that is, the second voltage V2. Is corrected so that it becomes higher. This correction may be set to be proportional to the temperature, for example, may be weighted according to the temperature, may be selected from several preset types according to the height of the temperature, or may be selected. The second voltage V2 may not be corrected when the temperature T is equal to or higher than the predetermined temperature T, and the second voltage V2 may be corrected only when the temperature T is larger than or lower than the predetermined temperature.

上述したように、上記第１の実施形態では、電動送風機23の動作終了時における二次電池25の電圧Ｖの変化量Δに基づいて第２の電圧V2を設定する。この電動送風機23の動作終了時は、その直前まで電動送風機23に給電するために放電していた二次電池25も温度Ｔが上昇していることから、二次電池25の内部抵抗が相対的に小さくなっており、電圧Ｖの差である変化量Δも相対的に小さくなる。したがって、この変化量Δに応じて第２の電圧V2を設定する場合には、第２の電圧V2も相対的に低く設定されることとなるから、電動送風機23の動作制限を相対的に低い電圧で解除可能となる。このため、二次電池25の放電時の深放電を避けつつ、従来よりも短時間での使用の再開が可能となり、例えば掃除の途中で二次電池25の電圧Ｖが低下し電動送風機23が停止した場合などの、掃除のやり残しがあるために可能な限り早期に掃除を再開したいなどのユーザのニーズに対応できる。 As described above, in the first embodiment, the second voltage V2 is set based on the change amount Δ of the voltage V of the secondary battery 25 at the end of the operation of the electric blower 23. At the end of the operation of the electric blower 23, the temperature T of the secondary battery 25, which had been discharged to supply power to the electric blower 23 until just before that, also rises, so that the internal resistance of the secondary battery 25 is relative. The amount of change Δ, which is the difference in voltage V, is also relatively small. Therefore, when the second voltage V2 is set according to the amount of change Δ, the second voltage V2 is also set relatively low, so that the operation limit of the electric blower 23 is relatively low. It can be released by voltage. Therefore, it is possible to resume use in a shorter time than before while avoiding deep discharge when the secondary battery 25 is discharged. For example, the voltage V of the secondary battery 25 drops during cleaning, and the electric blower 23 is used. It is possible to meet the needs of users who want to resume cleaning as soon as possible due to unfinished cleaning such as when it is stopped.

次に、第２の実施形態を図５を参照して説明する。なお、上記第１の実施形態と同様の構成および作用については、同一符号を付してその説明を省略する。 Next, the second embodiment will be described with reference to FIG. The same configurations and operations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

この第２の実施形態は、上記第１の実施形態の電圧Vaと電圧Vpとを測定するタイミングが、電動送風機23の動作開始時となっているものである。 In this second embodiment, the timing for measuring the voltage Va and the voltage Vp in the first embodiment is the time when the operation of the electric blower 23 starts.

すなわち、制御部24は、電動送風機23の動作開始時における二次電池25の電圧の変化量に基づき上記の第２の電圧V2を設定する。 That is, the control unit 24 sets the above-mentioned second voltage V2 based on the amount of change in the voltage of the secondary battery 25 at the start of operation of the electric blower 23.

具体的に、制御部24は、電気掃除機11の運転開始、すなわち電動送風機23の動作開始が設定ボタン26により指示された場合、すなわち、電動送風機23の動作開始の直前のタイミングで、電圧検出部28により検出された二次電池25の電圧Ｖを保持する(電圧Vp)。この電圧Vpは、電動送風機23に対し電流が流れていない状態での電圧となる。さらに、この動作開始から所定時間後、制御部24は、電圧検出部28により検出された二次電池25の電圧Ｖを読み取る(電圧Va)。この電圧Vaは、電動送風機23に対し電流が流れている状態での電圧となる。そこで、制御部24は、第２の電圧V2を設定する際に、これら電圧Vaと電圧Vpとの差(Vp－Va)を算出し、その算出値を変化量Δとし、この変化量Δに応じて二次電池25の内部抵抗を想定し、この変化量Δに基づき第２の電圧V2を設定する。 Specifically, the control unit 24 detects the voltage when the operation of the electric vacuum cleaner 11, that is, the start of operation of the electric blower 23 is instructed by the setting button 26, that is, at the timing immediately before the start of operation of the electric blower 23. Holds the voltage V of the secondary battery 25 detected by the unit 28 (voltage Vp). This voltage Vp is a voltage in a state where no current is flowing through the electric blower 23. Further, after a predetermined time from the start of this operation, the control unit 24 reads the voltage V of the secondary battery 25 detected by the voltage detection unit 28 (voltage Va). This voltage Va is a voltage in a state where a current is flowing through the electric blower 23. Therefore, when setting the second voltage V2, the control unit 24 calculates the difference (Vp−Va) between these voltage Va and the voltage Vp, sets the calculated value as the change amount Δ, and sets the change amount Δ. The internal resistance of the secondary battery 25 is assumed accordingly, and the second voltage V2 is set based on this change amount Δ.

このとき、上記第１の実施形態と同様に、内部抵抗は、例えばオームの法則に基づき算出してもよいし、記憶された変化量Δに対応する内部抵抗又は放電容量のテーブルを参照して予想してもよい。オームの法則に基づき内部抵抗を算出する場合には、電動送風機23に流れる電流が必要になる。この電流は、電動送風機23の動作開始直後の動作状態での電流とする。したがって、本実施形態において、第２の電圧V2の設定には、動作開始直後の電動送風機23の電流を考慮に入れてもよい。 At this time, as in the first embodiment, the internal resistance may be calculated based on, for example, Ohm's law, or the table of the internal resistance or the discharge capacity corresponding to the stored change amount Δ may be referred to. You may expect it. When calculating the internal resistance based on Ohm's law, the current flowing through the electric blower 23 is required. This current is the current in the operating state immediately after the start of operation of the electric blower 23. Therefore, in the present embodiment, the current of the electric blower 23 immediately after the start of operation may be taken into consideration in the setting of the second voltage V2.

そして、これらの動作を、図５に示すフローチャートも参照しながら説明する。 Then, these operations will be described with reference to the flowchart shown in FIG.

本実施形態において、制御部24は、ステップS9，S11，S12の制御に代えて、以下のステップS20～S22の制御を備える。 In the present embodiment, the control unit 24 includes the following controls in steps S20 to S22 instead of the controls in steps S9, S11, and S12.

ステップS3の後、制御部24は、電圧検出部28により検出した電圧Ｖを保持し(電圧Vp)、ステップS4に進む(ステップS20)。 After step S3, the control unit 24 holds the voltage V detected by the voltage detection unit 28 (voltage Vp), and proceeds to step S4 (step S20).

また、ステップS5の後、制御部24は、電圧検出部28および温度検出部29を介して二次電池25の電圧Ｖ(電圧Va)、および、温度Ｔを取得し、これら電圧Ｖおよび温度Ｔを保持する(ステップS21)。 Further, after step S5, the control unit 24 acquires the voltage V (voltage Va) and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and these voltage V and temperature T are obtained. (Step S21).

さらに、ステップS9に代えて、電動送風機23を停止し(ステップS22)、ステップS13に進む。 Further, instead of step S9, the electric blower 23 is stopped (step S22), and the process proceeds to step S13.

そして、ステップS13において、制御部24は、ステップS20で取得した電圧VpとステップS21で取得した電圧Vaを用いて、上記第１の実施形態と同様に第２の電圧V2を設定する。 Then, in step S13, the control unit 24 sets the second voltage V2 in the same manner as in the first embodiment, using the voltage Vp acquired in step S20 and the voltage Va acquired in step S21.

このように、上記第２の実施形態では、電動送風機23の動作開始時における二次電池25の電圧Ｖの変化量Δに基づいて第２の電圧V2を設定する。この電動送風機23の動作開始時は、通常二次電池25が環境温度と略等しい、いわば充分に「冷えた」状態となっていることから、二次電池25の内部抵抗が相対的に大きくなっており、電圧Ｖの差すなわち変化量Δも相対的に大きくなる。したがって、この電圧Ｖの差に応じて第２の電圧V2を設定する場合には、第２の電圧V2も相対的に高く設定されることとなるから、電動送風機23の動作制限が相対的に高い電圧で解除可能となる。このため、例えば充電により二次電池25の電圧Ｖが第２の電圧V2を超えて電動送風機23の動作制限が解除されて間もなく電動送風機23を動作させた場合などに、二次電池25の内部抵抗が高いことにより大きな電圧降下が生じても二次電池25が容易に深放電状態となりにくく、かつ、従来よりも短時間での使用の再開が可能になる。 As described above, in the second embodiment, the second voltage V2 is set based on the change amount Δ of the voltage V of the secondary battery 25 at the start of operation of the electric blower 23. When the operation of the electric blower 23 is started, the internal resistance of the secondary battery 25 is relatively large because the secondary battery 25 is usually in a sufficiently "cold" state, which is almost equal to the environmental temperature. Therefore, the difference in voltage V, that is, the amount of change Δ also becomes relatively large. Therefore, when the second voltage V2 is set according to the difference in the voltage V, the second voltage V2 is also set relatively high, so that the operation limit of the electric blower 23 is relatively high. It can be released with a high voltage. Therefore, for example, when the voltage V of the secondary battery 25 exceeds the second voltage V2 due to charging and the operation restriction of the electric blower 23 is lifted and the electric blower 23 is operated shortly thereafter, the inside of the secondary battery 25 is operated. Due to the high resistance, the secondary battery 25 is unlikely to be in a deep discharge state easily even if a large voltage drop occurs, and it is possible to resume use in a shorter time than before.

なお、上記第１の実施形態と第２の実施形態とを組み合わせてもよい。すなわち、電動送風機23の動作開始時と動作終了時との双方のタイミングにおける二次電池25の電圧Ｖの変化量Δを検出してもよい。この場合には、それぞれの電圧Ｖの差のうち、例えば大きい方、あるいは小さい方又は大きくない方などのいずれか一方を選択して第２の電圧V2を設定することもできるし、これら変化量Δの平均値や適宜重み付けをした値などに基づいて第２の電圧V2を設定することもできる。 The first embodiment and the second embodiment may be combined. That is, the change amount Δ of the voltage V of the secondary battery 25 may be detected at both the timings of the start of operation and the end of operation of the electric blower 23. In this case, the second voltage V2 can be set by selecting either one of the differences between the respective voltages V, for example, the larger one, the smaller one, or the smaller one, and the amount of change thereof. It is also possible to set the second voltage V2 based on the average value of Δ, an appropriately weighted value, or the like.

また、上記各実施形態において、電気掃除機11は、集塵部22を備えず、電動送風機23の排気によって塵埃を吹き飛ばすブロワなどとして構成することもできる。 Further, in each of the above embodiments, the vacuum cleaner 11 is not provided with the dust collecting unit 22, and can be configured as a blower or the like that blows off the dust by the exhaust of the electric blower 23.

さらに、電気機器は、電気掃除機11に限らず、例えば電動ドリルなどの電動工具などにも対応して適用できる。この場合、電動送風機23以外にも、例えばモータなどを電動部として用いることができる。 Further, the electric device is not limited to the vacuum cleaner 11, and can be applied to, for example, an electric tool such as an electric drill. In this case, in addition to the electric blower 23, for example, a motor or the like can be used as the electric unit.

以上説明した少なくとも一つの実施形態によれば、制御部24が、電動送風機23の動作開始時と動作終了時との少なくともいずれかのタイミングにおける二次電池25の電圧Ｖの変化量に基づき第２の電圧V2を設定する、具体的には変化量Δが相対的に大きい場合に第２の電圧V2を相対的に高く設定する。このため、例えば劣化の度合いや二次電池25の温度、あるいは環境温度などによって異なる二次電池25の内部抵抗に対して、電動送風機23が動作開始可能な第２の電圧V2を、二次電池25の深放電を抑制しつつ可能な限り早期に動作を再開できるように適切に設定できる。 According to at least one embodiment described above, the control unit 24 is based on the amount of change in the voltage V of the secondary battery 25 at at least one of the timings when the operation of the electric blower 23 starts and when the operation ends. The second voltage V2 is set relatively high when the change amount Δ is relatively large. Therefore, for example, the secondary battery has a second voltage V2 at which the electric blower 23 can start operation against the internal resistance of the secondary battery 25, which differs depending on the degree of deterioration, the temperature of the secondary battery 25, the environmental temperature, and the like. It can be set appropriately so that the operation can be resumed as soon as possible while suppressing the deep discharge of 25.

すなわち、例えば二次電池25の内部抵抗が相対的に小さい場合には、二次電池25の深放電を避けながら、第２の電圧V2を低く設定できて電動送風機23の動作制限をより早期に解除でき、電気掃除機11の早期の運転再開を可能としつつ、二次電池25の内部抵抗が相対的に大きい場合には、第２の電圧V2を相対的に高く設定できて、電動送風機23の動作時に二次電池25の内部抵抗に起因して大きな電圧降下が生じた場合でも二次電池25の深放電を抑制して電気掃除機11の早期の運転再開を可能とすることができる。 That is, for example, when the internal resistance of the secondary battery 25 is relatively small, the second voltage V2 can be set low while avoiding the deep discharge of the secondary battery 25, and the operation limit of the electric blower 23 can be set earlier. When the internal resistance of the secondary battery 25 is relatively large, the second voltage V2 can be set relatively high while enabling the early restart of the operation of the electric vacuum cleaner 11, and the electric blower 23 can be released. Even if a large voltage drop occurs due to the internal resistance of the secondary battery 25 during the operation of the secondary battery 25, it is possible to suppress the deep discharge of the secondary battery 25 and enable the early restart of the operation of the electric vacuum cleaner 11.

また、制御部24が、電動送風機23に供給される電流を変えて電動送風機23の出力を調整する機能を有し、二次電池25の電圧Ｖの変化量Δとこの変化量Δを検出したときの電動送風機23の電流とに基づき第２の電圧V2を設定するので、例えば複数の動作モードがある場合など、電動送風機23の出力に応じて電流が異なる場合でも、それぞれの電流に対応して生じる電圧降下に対して、二次電池25の深放電を抑制しつつ可能な限り早期に動作を再開できるように第２の電圧V2を設定できる。 Further, the control unit 24 has a function of adjusting the output of the electric blower 23 by changing the current supplied to the electric blower 23, and detects the change amount Δ and the change amount Δ of the voltage V of the secondary battery 25. Since the second voltage V2 is set based on the current of the electric blower 23 at the time, even if the current differs depending on the output of the electric blower 23, for example, when there are multiple operation modes, it corresponds to each current. The second voltage V2 can be set so that the operation can be resumed as soon as possible while suppressing the deep discharge of the secondary battery 25 with respect to the voltage drop that occurs.

また、制御部24が、二次電池25の電圧Ｖと放電容量との対応を示す予め記憶されたデータに基づき、二次電池25の電圧Ｖから予測されたこの二次電池25の放電容量に基づいて第２の電圧V2を設定することで、二次電池25の残っている放電容量を加味して第２の電圧V2をより精度よく設定できる。 Further, the control unit 24 determines the discharge capacity of the secondary battery 25 predicted from the voltage V of the secondary battery 25 based on the data stored in advance indicating the correspondence between the voltage V of the secondary battery 25 and the discharge capacity. By setting the second voltage V2 based on this, the second voltage V2 can be set more accurately in consideration of the remaining discharge capacity of the secondary battery 25.

また、制御部24が、電動送風機23の動作終了時の二次電池25の温度Ｔを加味して第２の電圧V2を設定することで、二次電池25の温度Ｔに応じて異なる内部抵抗をより精度よく予測することができ、第２の電圧V2の設定精度をより向上できる。例えば、二次電池25の本来の内部抵抗は相対的に大きいものの、電動送風機23の動作終了直後などの場合には二次電池25が発熱によって温度Ｔが高くなっていることで内部抵抗が相対的に小さくなっていることも想定されるため、温度Ｔを加味して第２の電圧V2を相対的に高く設定することで、第２の電圧V2を本来の内部抵抗に基づく値に接近させて設定でき、二次電池25の深放電を抑制できる。 Further, the control unit 24 sets the second voltage V2 in consideration of the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23, so that the internal resistance differs according to the temperature T of the secondary battery 25. Can be predicted more accurately, and the setting accuracy of the second voltage V2 can be further improved. For example, although the original internal resistance of the secondary battery 25 is relatively large, in the case immediately after the operation of the electric blower 23 is completed, the internal resistance is relative because the temperature T of the secondary battery 25 is high due to heat generation. Therefore, by setting the second voltage V2 relatively high in consideration of the temperature T, the second voltage V2 is brought closer to the value based on the original internal resistance. And can suppress the deep discharge of the secondary battery 25.

さらに、制御部24は、電動送風機23の動作開始時と動作終了時との少なくともいずれかのタイミングにおける二次電池25の電圧Ｖの変化量Δに応じて、電動送風機23の動作電流を低下させるので、二次電池25の深放電を抑制しつつ可能な限り早期に動作を再開できるように第２の電圧V2を設定できる。 Further, the control unit 24 reduces the operating current of the electric blower 23 according to the change amount Δ of the voltage V of the secondary battery 25 at at least one of the timings when the operation of the electric blower 23 starts and ends. Therefore, the second voltage V2 can be set so that the operation can be resumed as soon as possible while suppressing the deep discharge of the secondary battery 25.

すなわち、例えば電圧Ｖの変化量Δから予測される二次電池25の内部抵抗が小さい場合などには、二次電池25の放電容量又は残量が少ない状態、すなわち二次電池25の電圧Ｖが相対的に低い状態から電動送風機23を動作させるときに、出力が小さい動作モードでの運転、あるいは各動作モードでの出力を抑制した状態での運転を可能とし、二次電池25の深放電を抑制できる。また、例えば電動送風機23の動作制限解除直後など、二次電池25の電圧Ｖが第２の電圧V2を超えてこの第２の電圧V2に近い場合でも、制御部24が電動送風機23の動作電流を低下させることで、電圧降下を抑制できるので、第２の電圧V2をより低く設定しても二次電池25の深放電を抑制可能になり、電気掃除機11がより早期に再動作可能になる。 That is, for example, when the internal resistance of the secondary battery 25 predicted from the change amount Δ of the voltage V is small, the discharge capacity or the remaining amount of the secondary battery 25 is low, that is, the voltage V of the secondary battery 25 is low. When operating the electric blower 23 from a relatively low state, it is possible to operate in an operation mode with a small output or in a state where the output is suppressed in each operation mode, and deep discharge of the secondary battery 25 is possible. Can be suppressed. Further, even when the voltage V of the secondary battery 25 exceeds the second voltage V2 and is close to the second voltage V2, for example, immediately after the operation restriction of the electric blower 23 is released, the control unit 24 controls the operating current of the electric blower 23. Since the voltage drop can be suppressed by lowering the voltage, it is possible to suppress the deep discharge of the secondary battery 25 even if the second voltage V2 is set lower, and the electric vacuum cleaner 11 can be restarted earlier. Become.

また、第２の電圧V2は、電動送風機23の動作の度、すなわち電気掃除機11の運転の度に設定するので、二次電池25の内部抵抗の変動に対しても、適切に第２の電圧V2を設定できる。このため、例えば一旦第２の電圧V2を高く又は低く設定した場合でも、その後二次電池25の内部抵抗が変化すれば、その都度第２の電圧V2を変化させることができるので、二次電池25の状態に応じた第２の電圧V2を設定できる。 Further, since the second voltage V2 is set every time the electric blower 23 is operated, that is, every time the vacuum cleaner 11 is operated, the second voltage V2 is appropriately set against fluctuations in the internal resistance of the secondary battery 25. The voltage V2 can be set. Therefore, for example, even if the second voltage V2 is set high or low once, if the internal resistance of the secondary battery 25 changes thereafter, the second voltage V2 can be changed each time, so that the secondary battery can be changed. A second voltage V2 can be set according to the 25 states.

そして、電動部として電動送風機23を用いる電気掃除機11に適用することで、大電流を用いる電気掃除機11において、二次電池25を深放電から確実に保護しつつ、可能な限り短時間での使用の再開が可能となる。 By applying it to the vacuum cleaner 11 that uses the electric blower 23 as the electric unit, the secondary battery 25 is reliably protected from deep discharge in the vacuum cleaner 11 that uses a large current, and in the shortest possible time. It is possible to resume the use of.

また、上述した実施形態では、二次電池25が劣化すると二次電池25の電気抵抗が大きくなり、放電時における降下電圧量も大きくなることに着目して、二次電池25の劣化を推測していた。これに限られず、二次電池25が劣化すると放電容量が減っていくことに着目して、充電時間が短くなったことに応じて二次電池25の劣化を推測するようにしてもよい。すなわち、電気機器は、二次電池25の充電時間の長さを測定する充電時間測定部を備え、電圧設定部が、二次電池25の充電時間の変化に基づいて所定電圧を設定するようにしてもよい。この所定電圧は、電動部の動作開始を許容するか否かの閾値であり、上述の実施形態でいう「第２の電圧V2」である。所定電圧の設定の仕方は、二次電池25の電圧を一定量上げるのに掛かる充電時間が以前よりも短くなったことに応じて、所定電圧を以前よりも大きくなるようにする。 Further, in the above-described embodiment, the deterioration of the secondary battery 25 is estimated by paying attention to the fact that when the secondary battery 25 deteriorates, the electric resistance of the secondary battery 25 increases and the amount of voltage drop during discharge also increases. Was there. Not limited to this, focusing on the fact that the discharge capacity decreases as the secondary battery 25 deteriorates, the deterioration of the secondary battery 25 may be estimated according to the shortened charging time. That is, the electric device includes a charging time measuring unit that measures the length of the charging time of the secondary battery 25, and the voltage setting unit sets a predetermined voltage based on the change in the charging time of the secondary battery 25. You may. This predetermined voltage is a threshold value for whether or not to allow the start of operation of the electric unit, and is the "second voltage V2" in the above-described embodiment. The method of setting the predetermined voltage is to make the predetermined voltage larger than before according to the charging time required to raise the voltage of the secondary battery 25 by a certain amount.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

11 電気機器としての電気掃除機
23 電動部である電動送風機
24 動作開始制御部および電圧設定部である制御部
25 二次電池
26 入力部としての設定ボタン
28 電圧検出手段としての電圧検出部
29 温度検出手段としての温度検出部 11 Vacuum cleaner as an electric device
23 Electric blower, which is an electric part
24 Operation start control unit and control unit that is a voltage setting unit
25 Rechargeable battery
26 Setting button as input
28 Voltage detector as voltage detection means
29 Temperature detector as a temperature detection means

Claims (8)

二次電池からの給電により動作する電動部と、
前記二次電池の電圧を検出する電圧検出手段と、
前記電動部の動作開始について外部からの指示を入力する入力部と、
前記二次電池の電圧が所定電圧より大きいときに前記外部からの指示が前記入力部により入力されると、前記電動部が動作開始するよう制御する動作開始制御部と、
前記電動部の動作終了時における前記二次電池の電圧の変化量に基づいて前記所定電圧を設定する電圧設定部と、
を具備し、
前記電圧設定部は、前記電動部の動作停止のタイミングでの第１の電圧と、この停止から所定時間後の第２の電圧と、の差を前記変化量とする
ことを特徴とした電気機器。 The electric part that operates by supplying power from the secondary battery,
A voltage detecting means for detecting the voltage of the secondary battery and
An input unit for inputting an external instruction regarding the start of operation of the electric unit, and an input unit.
When the voltage of the secondary battery is larger than the predetermined voltage and an instruction from the outside is input by the input unit, the operation start control unit that controls the operation of the electric unit to start the operation, and the operation start control unit.
A voltage setting unit that sets the predetermined voltage based on the amount of change in the voltage of the secondary battery at the end of operation of the electric unit, and a voltage setting unit.
Equipped with
The voltage setting unit uses the difference between the first voltage at the timing when the operation of the electric unit is stopped and the second voltage after a predetermined time from the stop as the amount of change.
Electrical equipment characterized by that. 二次電池からの給電により動作する電動部と、The electric part that operates by supplying power from the secondary battery,
前記二次電池の電圧を検出する電圧検出手段と、A voltage detecting means for detecting the voltage of the secondary battery and
前記電動部の動作開始について外部からの指示を入力する入力部と、An input unit for inputting an external instruction regarding the start of operation of the electric unit, and an input unit.
前記二次電池の電圧が所定電圧より大きいときに前記外部からの指示が前記入力部により入力されると、前記電動部が動作開始するよう制御する動作開始制御部と、When the voltage of the secondary battery is larger than the predetermined voltage and an instruction from the outside is input by the input unit, the operation start control unit that controls the operation of the electric unit to start the operation, and the operation start control unit.
前記電動部の動作開始時における前記二次電池の電圧の変化量に基づいて前記所定電圧を設定する電圧設定部と、A voltage setting unit that sets the predetermined voltage based on the amount of change in the voltage of the secondary battery at the start of operation of the electric unit, and a voltage setting unit.
を具備し、Equipped with
前記電圧設定部は、前記電動部の動作開始の直前のタイミングでの前記二次電池の第１の電圧と、この動作開始から所定時間後の前記二次電池の第２の電圧と、の差を前記変化量とするThe voltage setting unit is the difference between the first voltage of the secondary battery at the timing immediately before the start of operation of the electric unit and the second voltage of the secondary battery after a predetermined time from the start of operation. Is the amount of change.
ことを特徴とした電気機器。Electrical equipment characterized by that. 前記電圧設定部は、前記電動部に供給される電流を変えて前記電動部の出力を調整する機能を有し、前記二次電池の前記第１の電圧と前記第２の電圧との差とこの差を検出したときの前記電動部の電流とに基づき前記所定電圧を設定する
ことを特徴とした請求項１又は２記載の電気機器。 The voltage setting unit has a function of adjusting the output of the electric unit by changing the current supplied to the electric unit, and is the difference between the first voltage and the second voltage of the secondary battery. The electric device according to claim 1 or 2 , wherein the predetermined voltage is set based on the current of the electric unit when the difference between the two is detected. 前記電圧設定部は、前記二次電池の電圧と放電容量との対応を示す予め記憶されたデータに基づき、前記二次電池の前記第１の電圧と前記第２の電圧とから予測されたこの二次電池の放電容量に基づいて前記所定電圧を設定する
ことを特徴とした請求項１ないし３いずれか一記載の電気機器。 The voltage setting unit is predicted from the first voltage and the second voltage of the secondary battery based on the data stored in advance indicating the correspondence between the voltage of the secondary battery and the discharge capacity. The electric device according to any one of claims 1 to 3 , wherein the predetermined voltage is set based on the discharge capacity of the secondary battery. 前記二次電池の温度を検出する温度検出手段を具備し、
前記電圧設定部は、前記電動部の動作終了時の前記二次電池の温度を加味して前記所定電圧を設定する
ことを特徴とした請求項１ないし４いずれか一記載の電気機器。 A temperature detecting means for detecting the temperature of the secondary battery is provided.
The electric device according to any one of claims 1 to 4 , wherein the voltage setting unit sets the predetermined voltage in consideration of the temperature of the secondary battery at the end of operation of the electric unit. 前記動作開始制御部は、前記変化量に応じて、前記電動部の動作電流を低下させる
ことを特徴とした請求項１ないし５いずれか一記載の電気機器。 The electric device according to any one of claims 1 to 5 , wherein the operation start control unit reduces the operating current of the electric unit according to the amount of change . 前記電動部には、動作電流が異なる複数の動作モードが設定され、A plurality of operation modes having different operating currents are set in the electric unit.
前記動作開始制御部は、相対的に動作電流が大きい前記動作モードと、相対的に動作電流が小さい前記動作モードと、のいずれかの前記動作モードでの前記電動部の動作電流を低下させるThe operation start control unit reduces the operating current of the electric unit in any one of the operating mode in which the operating current is relatively large and the operating mode in which the operating current is relatively small.
ことを特徴とする請求項６記載の電気機器。6. The electrical device according to claim 6. 前記電動部は、電動送風機である
ことを特徴とした請求項１ないし７いずれか一記載の電気機器。 The electric device according to any one of claims 1 to 7 , wherein the electric unit is an electric blower.
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