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
  • A47L9/2868—Arrangements for power supply of vacuum cleaners or the accessories thereof
  • A47L9/2878—Dual-powered vacuum cleaners, i.e. devices which can be operated with mains power supply or by batteries
• • 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
  • A47L9/20—Means for cleaning filters

Definitions

• the invention relates to a vacuum cleaner, comprising a suction inlet, a dirt collecting container, a filter device, a suction line, a suction unit, wherein the dirt collecting container via the filter device and the suction is in flow communication with the suction unit and the filter device is acted upon by the suction unit with negative pressure, and an external air valve device , wherein the filter device on the clean side via the external air valve device can be acted upon with external air and the external air valve device for cleaning the filter device from a closed valve position in an open valve position and back from the open valve position in a closed valve position can be brought.
• the invention relates to a method for cleaning a filter of a vacuum cleaner, wherein the filter for cleaning on the clean side is acted upon by a foreign air valve means with external air, wherein for cleaning on the external air valve means a closed valve position is changed to an open valve position.
• the invention has for its object to provide a vacuum cleaner of the type mentioned, which allows optimized for a user use.
• This object is achieved according to the invention in the vacuum cleaner mentioned above in that a battery device is provided for supplying energy to the external air valve device.
• a battery device which is in particular rechargeable and includes, for example, one or more accumulators, a filter cleaning can be performed independently of a supply network. For example, a filter cleaning can also be performed during or after switching off the suction operation of the vacuum cleaner.
• a filter cleaning can then also be carried out with a vacuum cleaner operated via the battery device.
• a powered via the battery device vacuum cleaner can be used in a field in which no mains voltage is available.
• Such an application is, for example, a shell. Typical of such applications is that a high particulate matter is present.
• a filter cleaning takes place via the battery device, so that an optimized suction operation is maintained.
• the battery device is rechargeable. It preferably comprises one or more accumulators. This makes the vacuum cleaner convenient for a user to use.
• an energy supply of the vacuum cleaner and in particular of the suction unit takes place via the battery device.
• This allows the battery device to use for sucking and it can perform a filter cleaning.
• an "autonomous" suction system can be provided for the duration of the battery device, in which the suction power is optimized during the runtime; especially when needed and preferably automatically a filter cleaning is performed.
• a mains voltage supply device for the vacuum cleaner is present, wherein in particular is adjustable or selectable, whether via the battery device, the power is supplied or via the mains voltage supply device.
• a control device which controls the cleaning of the filter device by means of the external air valve device, wherein triggering of the cleaning takes place manually or automatically and in particular time-dependent and / or as a function of one or more sensor signals.
• the sensor signals are, for example, signals which measure the pressure drop across a filter of the filter device. Automatic filter cleaning minimizes operator intervention. An optimized suction result is ensured over the running time of the battery device.
• control device which controls the external air valve device also drives an electric motor device (with at least one electric motor) of the suction unit.
• an electric motor device with at least one electric motor
• the same control device and the battery device are coupled and in particular the control device controls the charging and / or discharge and / or operation of the battery device and / or regulates and / or monitored.
• the control device controls the charging and / or discharge and / or operation of the battery device and / or regulates and / or monitored.
• an optimized operation of the vacuum cleaner including filter cleaning can be achieved.
• the corresponding control electronics for example, a discharging process of a rechargeable battery device can be controlled such that it is optimally loaded with regard to battery capacity and / or service life.
• the battery device comprises a fan device for cooling batteries (in particular accumulators).
• the control device which also controls the electric motor device, can then in Ab- pendent of the electric motor operation, the fan device to be controlled.
• the vacuum cleaner is turned off to turn off the fan device with delay.
• the battery device provides the electrical energy, can be checked via the controller, whether the battery device still has sufficient charge capacity for such a filter cleaning process.
• control device comprises at least one controller for the control of the electric motor device.
• the controller comprises a first controller associated with a mains voltage supply and has a second controller associated with the battery device, wherein either the first controller or the second controller drives the electric motor device depending on which power supply is in effect.
• the controller includes a motor drive subunit that is in signal effective communication with an external air valve driver subunit of the controller.
• the external air valve drive subunit provides for a corresponding
• the motor drive subunit has information via the motor control and / or by means of which the electric motor can be controlled. Through a signal-effective connection, which can be unidirectional or bidirectional, a link between external air valve control and thus cleaning and motor control can take place. This makes it possible, for example, to move away from an operating point of the electric motor (at the operating point, a rotor of an electric motor is not accelerated) during the cleaning, or it is possible to set a specific operating point during a cleaning process.
• the motor drive subunit provides for such driving of the electric motor device that an operating point or an operating point range of the electric motor device is maintained during a cleaning process of the filter device. This allows the vacuum cleaner to be optimized and operated in an energy-efficient manner (with high efficiency).
• a receptacle for the battery device is arranged on a circuit board on which an electronic control device for the electric motor device is arranged.
• the conduction path for electrical lines in the vacuum cleaner can be minimized. It is possible to provide a compact electronic module in which the electronic control device is integrated and which has a direct energy connection for the battery device. If the battery device comprises a fan device, then it is particularly advantageous if the fan device is likewise arranged directly on the corresponding circuit board.
• the suction unit has an electric motor device with at least one electric motor.
• the at least one electric motor is a permanent magnet-excited synchronous motor.
• a permanent magnet-excited synchronous motor has a plurality of permanent magnets which are arranged on the rotor.
• a permanent magnet synchronous motor can be operated in particular brushless
• the at least one electric motor is electronically commutated (EC motor). It then no brushes, etc. must be provided.
• EC motor electronically commutated
• Controller controls corresponding coils, which are arranged on a stator of the electric motor, so that a rotor rotates.
• a balance between the at least one electric motor and a blower of the suction unit, which is driven by the at least one electric motor can be carried out by software.
• the operating point of the at least one electric motor is that point or region in which the torque provided by the rotary motor corresponds to the required torque of the blower.
• a rotor of the at least one electric motor is then not accelerated or decelerated.
• This working point can be adjusted by software in an electronically commutated electric motor and possibly also vary.
• the manufacture and assembly of the vacuum cleaner is simplified and there are more operating options or control options.
• one or more operating points can be set specifically for a filter cleaning process.
• the electronic circuit for controlling the at least one electric motor can also be used with appropriate training to control a Filterabcurisvorgang or to control the battery device or to monitor or monitor.
• the at least one electric motor is a three-phase motor.
• Such an electric motor can be realized with minimized noise and optimized efficiency.
• the suction unit comprises a volute with a rotating impeller in the volute casing.
• a tangential inlet for sucked air is provided on the volute casing. This gives an optimized efficiency with increased runtime.
• a power supply of the external air valve device takes place via a battery device.
• the method according to the invention has the advantages already explained in connection with the vacuum cleaner according to the invention.
• the battery device is rechargeable.
• the battery device supplies energy to a suction unit of the vacuum cleaner and in particular to the entire vacuum cleaner.
• an autonomous vacuum cleaner can be provided for the capacity time of the battery device, which provides an optimized suction result, since filter cleaning is also carried out.
• a suction unit of the vacuum cleaner has at least one electric motor, which is supplied with energy via the battery device.
• the cleaning is carried out automatically, for example within certain time intervals and / or as required, for example when a pressure drop across a filter of the filter device exceeds a certain threshold.
• a control of the at least one electric motor in response to a control of the external air valve device takes place. This makes it possible to carry out a coupling between the activation of the electric motor and the control of the external air valve device. As a result, optimized suction results can be achieved. If, for example, an electronically commutated permanent magnet-excited synchronous motor is used as the electric motor, then this can be over activate a pulse width modulated signal. Basically, a supply voltage which is supplied by the battery device, not be adjusted depending on the control even during a cleaning process. Due to the coupling between the electric motor control and the external air valve device control, for example, an operating point of an electric motor can also be selectively retained or even selectively varied during a filter cleaning process. For example, a coupled AnSteu réelle is used to still achieve a suction during a filter cleaning process and / or to avoid blowing out of dirt from a dirt collecting.
• the suction power of the suction unit is increased before a transition of the external air valve in the open valve position and later reduced again.
• the suction power of the suction unit can be changed in dependence on the valve position of the external air valve.
• the suction power of the suction unit is increased even before the external air valve transitions from its closed valve position to its open valve position.
• the negative pressure prevailing in the dirt collecting container is increased before external air flows through the at least one filter in the counterflow direction and penetrates into the dirt collecting container.
• the external air valve passes from its closed valve position to its open valve position, there is thus a particularly large negative pressure in the dirt collecting container.
• the inflowing external air mechanically strongly shakes the at least one filter and flows through to a large extent in the counterflow direction.
• the cleaning of the at least one filter can be increased thereby.
• the suction line of the suction unit is reduced again.
• An increase in the suction power is not necessarily required before each filter cleaning, it may be provided, for example, that the suction power, for example, only every second or every third or generally every nth transition of the external air valve is increased in the open valve position, where n is an integer greater than 1, whereas the suction power of the suction unit otherwise assumes a constant value.
• the suction power remains increased until the external air valve has repeatedly moved from the closed valve position on the open valve position back into the closed valve position.
• the suction power is increased before a first transition of the external air valve in the open position and then opens and closes the external air valve several times in a row, the opening time can be, for example, less than 0.5 seconds.
• the suction power of the suction unit can be increased.
• a particularly effective filter cleaning is achieved in an advantageous embodiment in that the suction power of the suction unit is increased before each transition of the external air valve in its open valve position and later reduced again.
• the suction power of the suction unit is increased before each transition of the external air valve in its open valve position and later reduced again.
• the transition of the external air valve from the closed valve position into the open valve position by changing the suction power of the suction unit as high as possible negative pressure in the dirt collector is present.
• This is advantageously achieved by the fact that the suction power of the suction at the transition of the external air valve in the open valve position. aggregates is increased.
• the suction power of the suction unit can already be reduced again. It is particularly advantageous, however, if the suction power of the suction unit remains elevated during the entire time interval in which the external air valve is open. This makes it possible to minimize the pressure increase associated with the inflow of the external air into the dirt collecting container. This in turn has the advantage that the suction operation of the Staubsauer- is not significantly interrupted during the filter cleaning for the user.
• the suction power of the suction unit is reduced again at the earliest with a transition of the external air valve into the closed valve position. It can also be provided that the suction power remains elevated even after the transition of the external air valve in the closed valve position for a short time, so that in the dirt collecting container incoming foreign air can be sucked with increased suction.
• the suction power of the suction unit is preferably increased by at least 10% before a transition of the external air valve in the open valve position, in particular by at least 30%.
• the cleaning of the at least one filter is expediently triggered manually, as a function of time or as a function of a sensor signal. It can be provided, for example, that at regular or irregular time intervals, a cleaning of the filter is performed automatically, the suction power of the suction unit is increased before a transition of the external air valve in the open position and later reduced again. It can be provided that the external air valve is opened and closed several times in quick succession, so that intermittently foreign air flow into the suction and the at least one filter can act on the clean side. Subsequently, the external air valve maintain its closed valve position, until a later time again a cleaning process is performed, in which the external air valve is again opened and closed several times for a short time in a row.
• the suction power of the suction unit can take an increased value. It is particularly advantageous, however, if before each transition of the external air valve in the open valve position, the suction power of the suction unit is increased and this then at most remains increased until the external air valve resumes its closed position. Thus, the suction power of the suction unit is varied according to the opening and closing movement of the external air valve, wherein it is increased in each case before the external air valve merges into the open valve position.
• the cleaning of the filter is triggered manually. This allows the user to perform a filter cleaning if he considers it necessary. If the filter cleaning is triggered manually, first the suction power of the suction unit is increased and only then the external air valve is briefly opened once or several times in succession and closed again, the suction power of the suction unit can be varied according to the movement of the external air valve.
• the vacuum cleaner may comprise a user-operable control element, such as a switch or a button. It may additionally or alternatively also be provided that the cleaning of the at least one filter is triggered as a function of a sensor signal. For example, the pressure prevailing in the suction line pressure can be measured.
• the flow resistance of the at least one filter increases as a result of increasing separation of solid particles, this results in a pressure reduction in the suction line. If the negative pressure prevailing in the suction line falls below a predetermined value, then a filter cleaning can be triggered. It can also be provided that the operating noise and / or the rotational speed of the suction unit are detected by means of sensors. With a pressure reduction in the suction due to a blockage of the filter, the speed of the suction unit and its operating noise increases, so that when exceeding a predetermined speed or in the presence of a predetermined operating noise, for example, in the presence of a certain volume, a filter cleaning can be activated.
• At least one flow sensor which detects the suction flow prevailing in the suction line, for example the flow velocity and / or the volume flow.
• a filter cleaning can be started.
• pressure sensors can be arranged upstream and downstream of the at least one filter so that the difference of the pressures prevailing upstream and downstream of the at least one filter can be detected. If the differential pressure exceeds a predetermined value, then a filter cleaning can also be triggered.
• the suction unit is provided at least temporarily supply energy from the rechargeable battery device.
• the at least one battery gradually discharges.
• To increase the Abcuris Fisch the suction unit provided supply energy is increased before a transition of the external air valve in the open valve position and later the supply energy is reduced again.
• the suction unit only has a relatively high energy consumption when the at least one filter is cleaned.
• the service life of the battery-powered vacuum cleaner can be extended.
• the increased supply energy can be provided to the suction unit of a battery.
• an additional charge storage which is used in addition to a battery to increase the supply energy of the suction unit for a filter cleaning.
• a capacitor can be used, preferably a double-layer capacitor.
• the capacitor can be gradually charged during the normal suction operation, wherein the amplitude of the charging current can be chosen relatively small, so that during battery operation, the battery is charged only slightly by the charging of the capacitor.
• the capacitor can be discharged within a short time, where he provides the suction unit energy to increase the suction power available.
• the suction power of the suction unit is variable only in a battery operation of the vacuum cleaner in dependence on the valve position of the external air valve.
• the suction power during a network operation is independent of the valve position of the external air valve, whereas in a battery operation, the suction power is varied in response to the valve position of the external air valve, thereby extending the service life of the vacuum cleaner in a battery operation.
• FIG 2 is an enlarged view of an external air valve device of the vacuum cleaner according to Figure 1;
• FIG 3 is a block diagram of a control device of the vacuum cleaner according to Figure 1;
• Figure 4 is a partial view of a variant of the control device according to Figure 3;
• Figure 5 is a schematic sectional view of another embodiment of a vacuum cleaner according to the invention.
• Figure 6 is a sectional view of an embodiment of a spiral housing.
• FIG. 1 An embodiment of a vacuum cleaner 10, which is shown schematically in Figure 1 in a sectional view, has a dirt collecting container 12, on which a suction head 14 is placed.
• the dirt collecting container 12 has a suction inlet 16 to which a suction hose 18 can be connected in the usual way.
• the suction head 14 seals the dirt collecting container 12 on the upper side and forms a suction outlet 20, on which a filter device 21 with (at least) a filter 22 is held.
• the filter 22 is followed by a suction line 24, via which the dirt collecting container 12 is in flow connection with a suction unit 26.
• the suction unit 26 comprises an electric motor device 25 with (at least) one electric motor 27 and a fan 28 that is rotationally driven by the electric motor 27.
• the dirt collecting container 12 is subjected to negative pressure during the operation of the vacuum cleaner 10 by the suction unit 26, so that a vacuum in FIG formed by the arrows 30 shown Saugströmung.
• suction air loaded with dirt can be sucked in via the suction inlet 16 into the dirt collecting container 12, which can then be sucked off by the suction unit 26.
• the suction air can be discharged from the suction unit 26 via the exhaust air openings of the suction head 14, which are not shown in the drawing, to the person skilled in the art, to the environment.
• an external air valve device 33 with (at least) an external air valve 34 is arranged above the filter 22 in the suction head 14 (shown enlarged in FIG. 2). It comprises a stationary in the suction head 14 valve holder 36 which forms a valve seat for a movable valve body in the form of a valve plate 38. The valve plate 38 is acted upon by a closing spring 40 with a closing force in the direction of the valve holder 36.
• the closing spring 40 is clamped between a plate-like, a plurality of flow passages, fixedly arranged in the suction head 14 filter holder 42 and the valve plate 38.
• the filter holder 42 carries a resilient stop element in the form of a stop spring 44.
• This particular (preferably as well as the closing spring 40) has a linear characteristic. It is for example designed as a helical spring.
• the stop spring 44 is not under tension in the closed position of the valve disk 38. Only when the valve plate 38 lifts off the valve seat of the valve holder 36, the stopper spring 44 comes to rest on the underside of the valve disk 38 and is slightly compressed in a further movement of the valve disk 38.
• valve disk 38 It thus exerts an increasing restoring force on the valve disk 38 and accelerates the Movement of the valve disk 38, starting from its (in Figure 2 shown) closed valve position via an open valve position back to the closed valve position.
• the valve plate 38 takes a distance to the valve holder 36, which forms the valve seat.
• the valve holder 36 has a plurality of passage openings, not shown in the drawing, whose mouth areas are closed by the valve disk 38 when it assumes its closed valve position.
• the suction head 14 has a lateral opening 46. Via the lateral opening 46, foreign air can flow into the passage openings of the valve holder 36. If the valve disk 36 has its open valve position spaced from the valve holder 36, the lateral opening 46 is in fluid communication with the suction line 24 via the passage openings of the valve holder 36 and the clean side 48 of the filter 22 facing away from the dirt collecting container 12 can act on it. If the valve disk 38 assumes its closed valve position, the flow connection between the lateral opening 46 and the suction line 24 is interrupted.
• the valve holder 36 carries an electromagnet 50.
• the electromagnet 50 In the circumferential direction of the electromagnet 50 is surrounded by an annular space 52, in which a molded upper side of the valve plate 38 guide sleeve 54 dips.
• the guide sleeve 54 receives a magnetizable element, for example in the form of an iron plate 56, which abuts in the closed valve position of the valve disk 38 at a free end edge 58 of the electromagnet 50 and 50 forms a closed magnetic circuit in combination with the electromagnet.
• the electromagnet 50 is in electrical connection via a power supply line 60 (FIG. 3) to an (electronic) control device 62 arranged in the suction head 14.
• the solenoid 50 during the normal suction operation of the vacuum cleaner 10 supplied with a supply current Due to the forming magnetic field of the valve plate 38 is reliably held in its closed position.
• the holding force of the electromagnet 50 is supported by the spring force of the closing spring 40.
• the filter 22 is flowed through in the counter-current direction, that is, contrary to the prevailing during the normal suction operation flow direction 30, from external air. This results in an effective cleaning of the filter 22.
• the power supply of the vacuum cleaner 10 is effected with the aid of a rechargeable battery device 63.
• a rechargeable battery device 63 This includes, for example, two rechargeable batteries 64, 66.
• the battery device 63 includes, for example, one or more lithium-ion batteries. These are arranged laterally next to the suction unit 26 in a battery compartment 68 of the suction head 14. The battery compartment 68 is accessible to the user for replacement of the batteries 64, 66 via an outwardly pivotable flap 70.
• the electronic control device 62 is arranged above the suction unit 26 in the suction head 14 and is connected via supply lines 72, 73, 74, 75 with the batteries 64 and 66 in electrical connection.
• a user-actuated pushbutton 82 which is arranged on the upper side of the suction head 14, is connected to the control device 62. By pressing the button 82, the user can (manually) trigger a filter cleaning.
• the battery device may also include vent means for cooling the batteries 64, 66 (not shown in the drawing). If batteries are used as batteries, which require cooling, then a battery-saving operation can be realized.
• the fan device in turn, preferably receives its electrical energy for operation from the batteries 64, 66 when battery operation is in progress.
• the electronic control device 62 is disposed on a circuit board. On the board, a receptacle for the battery device 63 is further arranged. The receptacle receives in particular the batteries 64, 66. Also, a fan device of the battery device 63 may be arranged on the receptacle.
• the control device 62 also includes electronics for the control and / or regulation and / or monitoring of the battery device 63.
• the control device 62 by way of which the electric motor device 25 is controlled, allows, for example, the fan device to be controlled in accordance with the control the electric motor device 25 is operated. For example, when the electric motor 27 is switched off, which is controlled by the control device 62, the fan device is also switched off (possibly with a time delay). For example, it is also possible to switch off the fan device when a filter cleaning operation is performed.
• a control can then be carried out via the control device 62, which allows a gentle operation of the battery device 63 with optimization to maximize the battery capacity.
• a charging process of the battery device 63 can then be correspondingly controlled or monitored via the control device 62. Further can be monitored via the controller 62, the "aging" of the battery device 63.
• a first pressure sensor 84 is arranged upstream of the filter 22 and a second pressure sensor 86 downstream of the filter 22, which are signal-effectively connected to the control device 62 and respectively provide a pressure-dependent control signal.
• the two pressure sensors 84 and 86 the on the filter 22 adjusting pressure difference can be determined. The more solid particles deposit on the filter 22, the greater the flow resistance of the filter 22 and the greater the pressure difference that arises. If the pressure difference reaches a predefinable value, then the control device 62 can automatically (automatically) trigger a filter cleaning.
• control device 62 automatically (automatically) triggers a filter cleaning independently of the prevailing pressure conditions and independently of the possible actuation of the button 82 at constant or different time intervals.
• a complete cleaning process thus comprises in such an embodiment, three opening and closing movements of the external air valve in quick succession.
• the length of the time interval between the times t 2 and t 3 may be, for example, 90 milliseconds.
• the vacuum cleaner 10 comprises a mains voltage supply device 88 (FIG. 3), by way of which the vacuum cleaner 10 can be supplied with mains power for supplying energy selectively or as desired.
• a mains voltage supply device 88 (FIG. 3), by way of which the vacuum cleaner 10 can be supplied with mains power for supplying energy selectively or as desired.
• an associated power cord is indicated by the reference numeral 90.
• An operator can then choose whether the power supply is via the mains voltage supply device 88 or the battery device 63.
• the mains voltage supply device 88 comprises a rectifier 92, which provides a direct current or a DC voltage at an output.
• the control device 62 has a supply subunit 94, via which the components of the vacuum cleaner 10 are supplied with electrical energy.
• the supply subunit 94 provides the necessary electrical energy to the solenoid 50 via the power supply line 60. It provides the electrical energy for supplying the control device 62. It provides the electrical energy for driving and actuating the electric motor 27.
• An output
• the supply subunit 94 can be formed by the battery device 63 or by the mains voltage supply device 88. It can also include a switch or the like, via which manual or automatic adjustment is made as to whether the power supply of the vacuum cleaner 10 is effected via the rechargeable battery device 63 or via the mains voltage supply device 88.
• the control device 62 comprises a Fremdluftventilan Kunststoffungs- subunit 98. This is in signal-effective connection with the button 82, the first pressure sensor 84 and the second pressure sensor 86. These provide corresponding signals of the Fremd Kunststoffventilan Kunststoffungs subunit 98, which then via a signal line 100 to the electromagnet 50 accordingly controls.
• the external air valve drive sub-unit 98 controls the solenoid 50 so that the magnetic holding force acting on the valve disk 38 is released, and a cleaning operation is performed when a manual triggering operation is detected by the key 82.
• a cleaning process is initiated when a pressure difference measured between the first pressure sensor 84 and the second pressure sensor 86, for example, exceeds a threshold value and / or a certain time interval has been passed.
• the external air valve drive subunit 98 provides for automatic filter cleaning.
• the electric motor 27 is in particular a permanent magnet-excited synchronous motor.
• the rotor rotor
• the rotor has a plurality of permanent magnets.
• a stator is provided with coils, which are controlled by the control device 62.
• the control takes place in such a way that an electronic commutation takes place.
• the control device 62 (at least) on a controller 102, which controls the electric motor 27 and thereby in particular the coils in the stator of the electric motor 27 accordingly.
• the control of the electric motor 27 by the controller 102 is carried out in particular via pulse width modulated signals. As a result, the corresponding energy is provided to the electric motor 27 with control signals.
• the electric motor 27 is particularly a brushless permanent magnet motor (EC motor).
• EC motor brushless permanent magnet motor
• the electric motor is a three-phase motor and in particular a permanent magnet three-phase synchronous motor. It can also be provided that the permanent magnet synchronous motor is only one-phase or two-phase as electric motor 27.
• the control device 62 comprises a motor drive subunit 104, which in particular is part of the controller 102, and which is in signal-effective connection with the external air valve drive subunit 98.
• a unidirectional connection can be provided, in which either the external air valve control subunit 98 signals corresponding to whether a cleaning is carried out or not, the motor drive subunit 104 provides or the motor drive subunit 104 of the forced air valve drive subunit 98 provides signals related to the motor drive of the electric motor 27.
• an increased negative pressure can be formed in the dirt collecting container 12 when a filter cleaning is carried out.
• Such an increase in the suction power is performed, for example, before each interruption of the supply current of the solenoid 50 or during a whole cleaning process (in the time interval between the time ti and t E ).
• the filter cleaning and the electric motor 27 can be controlled so as to prevent a departure from an operating point due to the filter cleaning.
• a single controller 102 may be provided.
• a first controller 106 is provided which is assigned to the mains voltage supply device 88 and a second controller 108 is provided, which of the battery device 63 is assigned.
• the respective controllers basically function as described above with reference to the controller 102. If the power supply of the electric motor via the mains voltage supply means 88 takes place, then controls the first controller 106, the electric motor 27 at. When power is supplied through the battery device 63, the second controller 108 drives the electric motor 27.
• the power supply can be traded separately via mains voltage and via the battery device 63 and the controllers can be separately optimized in this regard. It can thereby use commercially available components.
• the fan 28 comprises a spiral housing 110.
• an impeller 112 is arranged in the spiral housing 110.
• the impeller 112 is driven by the electric motor 27 and, for example, rotationally fixed to the rotor of the electric motor 27 is connected.
• An inlet region 114 of the volute casing 110 is arranged tangentially. This inlet region 114 is in fluid communication with the suction conduit 24.
• the vacuum cleaner 10 according to the invention works as follows:
• the vacuum cleaner 10 can be operated independently of the mains current via the battery device.
• the battery device 63 supplies the suction unit 26 and in particular the electric motor 27 independent of the mains with electrical energy in order to be able to carry out suction operations.
• a typical field of use for mains-independent vacuum cleaners 10 is on construction sites such as, for example, shell construction, where there is no outlet in a working area. In such applications, suction material often also contains a high proportion of fine dust.
• the external air valve device 33 is provided for filter cleaning. This is also determined by the battery Device 63 operated independently of the mains. As a result, an optimized operation of the vacuum cleaner 10 is possible independent of the mains; a suction operation is possible and, if necessary, a filter cleaning is carried out manually and in particular automatically.
• a high efficiency can be achieved, that is, the energy consumption of the electric motor 27 can be kept low. Also by the use of the spiral housing 110, a high efficiency with respect to the suction power can be achieved and thereby the running time can be increased.
• the control takes place via the controller 102 or 106, 108. This makes it possible to realize a simple link between the control of the filter cleaning and the activation of the electric motor 27. For example, the control device 62 then prevents it from leaving the operating point. As a result, the vacuum cleaner 10 can be operated in an energy-saving manner when the suction operation is optimized.

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• Electric Vacuum Cleaner (AREA)

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• 2012
  • 2012-02-13 EP EP12703139.1A patent/EP2672871B1/de active Active

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