EP0285801B1 - Einrichtung zur Fernsteuerung des Gebläsemotors eines Staubsaugers vom Handgriff des Saugschlauches aus - Google Patents

Einrichtung zur Fernsteuerung des Gebläsemotors eines Staubsaugers vom Handgriff des Saugschlauches aus Download PDF

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Publication number
EP0285801B1
EP0285801B1 EP88103022A EP88103022A EP0285801B1 EP 0285801 B1 EP0285801 B1 EP 0285801B1 EP 88103022 A EP88103022 A EP 88103022A EP 88103022 A EP88103022 A EP 88103022A EP 0285801 B1 EP0285801 B1 EP 0285801B1
Authority
EP
European Patent Office
Prior art keywords
control
input
rectifier
voltage
comparator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88103022A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0285801A1 (de
Inventor
Ehrenhardt Dipl.-Ing. Kaupa (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT88103022T priority Critical patent/ATE61921T1/de
Publication of EP0285801A1 publication Critical patent/EP0285801A1/de
Application granted granted Critical
Publication of EP0285801B1 publication Critical patent/EP0285801B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A47L9/2894—Details related to signal transmission in suction cleaners
    • 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
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • 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
    • A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays

Definitions

  • the invention relates to a device for remote control of the blower motor of a vacuum cleaner from the handle of the suction hose.
  • a remote control for the blower motor of a vacuum cleaner in which the two-wire electrical line provided anyway on the suction pipe and suction hose for feeding a motor provided in the suction nozzle for driving a brush roller simultaneously for transmitting control commands for the Speed regulation of the blower motor is used.
  • one wire of the line leading to the motor of the brush roller is interrupted by means of a switching element arranged on the handle of the suction tube and switched over to a one-way rectifier.
  • An integrator arranged in the vacuum cleaner housing is charged by the direct current now flowing in the line. The output voltage of the integrator is used to control an electronic semiconductor switching element located in the circuit of the blower motor.
  • the one-way rectifier consists of diodes that can be connected separately and connected in parallel, so that the speed of the blower motor can be increased or decreased as required.
  • a memory element is connected downstream of the integrator, the output of which is connected to the one input of a comparator, the other input of which is connected to a component providing ramp-shaped signals.
  • the output of the comparator finally controls the semiconductor switching element located in the circuit of the blower motor, so that the desired speed regulation is achieved.
  • the invention is based on the object, while maintaining the two-wire control line, in addition to the power control of the blower motor on the handle, to enable a display for a necessary filter change.
  • a periodic control of the semiconductor switches is achieved in that they are connected together to the control output of an operational amplifier, one control input of which is connected directly to one pole of the control rectifier designed as a single-phase bridge rectifier and the other control input of which is connected to a via a voltage divider via a decoupling diode Control rectifier fed, connected with smoothing DC voltage circuit.
  • a pulsating DC voltage is thus present at one control input of the operational amplifier and a continuous DC voltage is present at the other control input.
  • a blocking signal for the semiconductor switch is present at the control output of the operational amplifier.
  • This periodic control signal can also be used for the speed control of the blower motor, in that the input of the other comparator is connected to the output of the operational amplifier and to this input of the comparator a zener diode, an ohmic resistor and a capacitor are connected in parallel, the resistor and the capacitor connected to the input of the comparator and decoupled from the Zener diode by a diode.
  • the capacitor is charged by the control signal of the operational amplifier, charging by the zener diode being always predetermined to the same voltage level.
  • the capacitor and the resistor are decoupled from the rest of the circuit by the diode, so that the capacitor can only discharge through the resistor. This creates a ramp-like voltage.
  • the comparator sends a control signal to the speed control device. Because the control pulses emitted by the operational amplifier are obtained from the course of the rectified mains voltage, the control signal supplied by the comparator is synchronized with the mains voltage when the comparator is controlled by these control pulses.
  • suction hose 2 with a handle connected to a suction hose 2 is designated.
  • the suction hose 2 is connected to the suction nozzle of a vacuum cleaner housing 3, which contains a blower 4 with a blower motor 5.
  • a vacuum cleaner housing 3 which contains a blower 4 with a blower motor 5.
  • a two-wire control line 7 embedded in the suction hose leads from the board 6 to the handle 1.
  • On this handle 1 there is a controllable resistance element 8 and a light-emitting diode 9 as a display element arranged and connected in series to the two-wire control line 7.
  • the remote control device is supplied with voltage via a transformer 10 fed by the mains voltage U.
  • the secondary winding of this transformer 10 feeds a single-phase bridge rectifier 11 serving as a control rectifier, to the positive pole of which a decoupling diode 12 is connected with its anode.
  • a smoothing capacitor 13 and a Zener diode 14 connected in parallel with it are connected to the cathode side of the decoupling diode 12.
  • a constant current source 15 is also connected with its input to the cathode side of the decoupling diode 12, that is to say to the smoothed DC voltage circuit.
  • One wire of the constant current source 15 is connected and the other wire of the control line 7 is connected to the negative pole of the bridge rectifier 11.
  • a peak value rectifier 17 with its input 18 is also connected to the output of the constant current source 15 via an input resistor 16.
  • a first semiconductor switch 19 with its load path is connected between the input 18 of the peak value rectifier 17 and the negative pole of the bridge rectifier 11. With its control input, this first semiconductor switch 19 is connected via a control resistor 20 at the output of an operational amplifier 21.
  • the operational amplifier 21 controls the first semiconductor switch 19 periodically on and off. In order to be able to generate periodic control pulses, the operational amplifier 21 is connected with its one control input to the positive pole of the bridge rectifier 11, this connection possibly also being able to take place via a voltage divider.
  • the other control input of the operational amplifier 21 is connected to the smoothed direct voltage circuit (cathode side of the decoupling diode 12) via a voltage divider 22.
  • the output of the operational amplifier 21 is also also led to the one input of a comparator 23.
  • a zener diode 24, an ohmic resistor 25 and a capacitor 26 are connected in parallel between this input and the negative pole of the bridge rectifier 11, the resistor 25 and the capacitor 26 being decoupled from the zener diode 24 by a diode 27.
  • the other input of the comparator 23 is connected to the output of the peak value rectifier 17.
  • the output of the comparator 23 is connected to the base of a control transistor 29 arranged in the circuit of an optocoupler 28.
  • a power stage 30, which is connected in series with the blower motor 5, is controlled by the optocoupler 28, which is used for electrical isolation between the mains voltage and the voltage circuit of the circuit board 6.
  • the visual display of a necessary filter change can be controlled in two ways, depending on whether a pressure switch with an opener or a closer is provided. If a pressure switch with a break contact 31 is used, the switching path of this break contact 31 becomes the input resistor 16 of the peak value rectifier 17 connected in parallel. If, on the other hand, a pressure switch with a make contact 32 is available, then, as indicated by the dashed line in FIG.
  • the light-emitting diode 9 is connected to the direct voltage diagonal of a full-wave rectifier 34.
  • the remote control device works as follows:
  • the level of the voltage drop across the series connection of this resistance element 8 and the light-emitting diode 9 is changed. Via the input resistor 16, this voltage is present at the input 18 of the peak value rectifier 17 when the first semiconductor switch 19 is blocked. As already mentioned, the first semiconductor switch 19 is periodically opened and closed by the operational amplifier 21.
  • the periodic sequence of the control pulses of the operational amplifier 21 arises from the fact that the DC voltage of the bridge rectifier 11 pulsating in the form of sine half-waves is applied to one input of the operational amplifier 21 and the continuous DC voltage prevailing on the cathode side of the decoupling diode 12 is applied to the other input of the operational amplifier 21 .
  • a corresponding response value for the operational amplifier 21 can be predetermined by the voltage divider 22.
  • At the output of the operational amplifier 21 there is a blocking signal for the first semiconductor switch 19 when the one control input sinusoidal voltage is lower than the continuous DC voltage applied to the other control input. If the sinusoidal voltage rises above the value of the continuous DC voltage present at the other input, a control signal for the first semiconductor switch 19 appears at the output of the operational amplifier 21.
  • the semiconductor switch 19 is thus switched on and off in synchronism with the mains voltage U.
  • the voltage pulse present at the input 18 of the peak value rectifier 17 during the blocking of the first semiconductor switch 19 causes a continuous DC voltage at the output of the peak value rectifier 17, the level of which depends on the level of the voltage pulse.
  • the DC voltage appearing at the output of the peak value rectifier 17 is thus proportional to the voltage drop set by the resistance element 8.
  • the first semiconductor switch 19 Since the sinusoidal voltage applied to one input of the operational amplifier 21 is only smaller than the continuous direct voltage applied to the other input of the operational amplifier 21 for a short period of time, the first semiconductor switch 19 is only blocked for a correspondingly short time. During the rest of the sine half-wave, the first semiconductor switch 19 is turned on and thus short-circuits the series connection of the resistance element 8 and the light-emitting diode 9 via the break contact 31 of the pressure switch. The light-emitting diode thus remains dark, since the short voltage pulse during the blocking time of the first semiconductor switch 19 is not sufficient to make the light-emitting diode 9 perceptibly light up.
  • the pressure switch responds at a certain filling level of the filter bag, then the short-circuit circuit for the series connection of the resistance element 8 is opened by the opener 31 and the LED 9 interrupted.
  • the light-emitting diode 9 now receives a current sufficient to light up and thereby signals a necessary filter change.
  • the power control of the blower motor is possible.
  • the voltage pulses generated by the opening and closing of the first semiconductor switch 19 at the input 18 of the peak value rectifier 17 are converted into a continuous DC voltage with a proportional amplitude.
  • This DC voltage which is proportional to the voltage drop set by the resistance element 8, is fed to one input of the comparator 23.
  • this comparator 23 there is a comparison of the continuous DC voltage, the level of which can be changed by resetting the resistance element 8, with the ramp-shaped voltage present at the other input.
  • This ramp-shaped voltage arises from the fact that the capacitor 26 is charged by a positive control pulse from the operational amplifier 21.
  • the upstream diode 24 limits the charging of the capacitor 26 to a constant voltage level.
  • the capacitor 26 begins to discharge via the ohmic resistor 25, the discharge circuit being decoupled from the rest of the circuit by the diode 27. Due to the discharge of the capacitor 26, the voltage present at the relevant control input of the comparator 23 drops. As soon as this voltage drops below the level of the voltage present at the other control input, the comparator 23 emits a control signal by which the control transistor 29 is turned on and thereby activates the optocoupler 28, which in turn controls the power stage 30 of the blower motor 5 accordingly.
  • a pressure switch with a closer 32 is used instead of a pressure switch with an opener 31, then a modification of the circuit is necessary.
  • a second semiconductor switch 33 is provided in this case, which is connected in parallel with the series circuit with its load path (collector-emitter path).
  • the control path (base-emitter path) of the second semiconductor switching element 33 is short-circuited by the make contact 32 of the pressure switch, and the second semiconductor switch 33 is thereby permanently blocked.
  • the light-emitting diode 9 thus has a current duration sufficient for lighting up.
  • the second semiconductor switch 33 is periodically opened and closed by the operational amplifier 21 via the base resistor 35 connected upstream of its base.
  • the correspondingly short blocking phase of the second semiconductor switch 33 is not sufficient to cause the light emitting diode 9 to light up.
  • the first semiconductor switch 19 is driven in parallel with the second semiconductor switch 33 by the operational amplifier 21, and the voltage pulses necessary for the peak value rectifier 17 are thus generated. Even after the pressure switch has responded and as a result caused blocking of the second semiconductor switch 33, the periodic control of the first semiconductor switch 19 is maintained, so that the performance of the blower motor 5 can still be controlled by adjusting the resistance element 8.
  • the remote control device described thus comes from the handle 1 for the power control of the blower motor 5 and the simultaneous display of a necessary filter change on the handle 1 with a two-wire control line 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Catching Or Destruction (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Control Of Ac Motors In General (AREA)
EP88103022A 1987-03-11 1988-02-29 Einrichtung zur Fernsteuerung des Gebläsemotors eines Staubsaugers vom Handgriff des Saugschlauches aus Expired - Lifetime EP0285801B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103022T ATE61921T1 (de) 1987-03-11 1988-02-29 Einrichtung zur fernsteuerung des geblaesemotors eines staubsaugers vom handgriff des saugschlauches aus.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707834 1987-03-11
DE3707834 1987-03-11

Publications (2)

Publication Number Publication Date
EP0285801A1 EP0285801A1 (de) 1988-10-12
EP0285801B1 true EP0285801B1 (de) 1991-03-27

Family

ID=6322792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103022A Expired - Lifetime EP0285801B1 (de) 1987-03-11 1988-02-29 Einrichtung zur Fernsteuerung des Gebläsemotors eines Staubsaugers vom Handgriff des Saugschlauches aus

Country Status (6)

Country Link
EP (1) EP0285801B1 (sv)
AT (1) ATE61921T1 (sv)
DE (1) DE3862137D1 (sv)
DK (1) DK125288A (sv)
FI (1) FI84877C (sv)
NO (1) NO881097L (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2547630B2 (ja) * 1988-12-19 1996-10-23 三洋電機株式会社 電気掃除機
SE463071B (sv) * 1989-02-14 1990-10-08 Electrolux Ab Anordning vid en dammsugare
FR2686721B1 (fr) * 1992-01-28 1994-04-29 Hoover Dispositif de telecommande a ultrasons pour aspirateur.
US5507067A (en) * 1994-05-12 1996-04-16 Newtronics Pty Ltd. Electronic vacuum cleaner control system
WO1996025788A1 (en) * 1995-02-16 1996-08-22 Philips Electronics N.V. Device for converting a resistance value into a control signal which depends on the resistance value, and electrical apparatus comprising such a device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117507C2 (de) * 1981-03-12 1984-08-30 Gerhard 7262 Althengstett Kurz Vorrichtung zur automatischen Saugleistungssteuerung eines Staubsaugers
DE3473729D1 (en) * 1983-02-12 1988-10-06 Matsushita Electric Ind Co Ltd Electric vacuum cleaner
DE3313700C2 (de) * 1983-04-15 1985-04-25 Gerhard 7262 Althengstett Kurz Vorrichtung zur manuellen, pneumatischen Betätigung eines einen elektrischen Motor aufweisenden Staubsaugers
DE3431164A1 (de) * 1984-02-08 1985-08-14 Gerhard 7262 Althengstett Kurz Staubsauger

Also Published As

Publication number Publication date
DE3862137D1 (de) 1991-05-02
NO881097L (no) 1988-09-12
DK125288A (da) 1988-09-12
FI84877B (fi) 1991-10-31
ATE61921T1 (de) 1991-04-15
DK125288D0 (da) 1988-03-09
FI874941A (fi) 1988-09-12
NO881097D0 (no) 1988-03-11
FI84877C (sv) 1992-02-10
EP0285801A1 (de) 1988-10-12
FI874941A0 (fi) 1987-11-09

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