EP3730024A1 - Vacuum cleaner and method for controlling a cleaning process in a vacuum cleaner - Google Patents

Vacuum cleaner and method for controlling a cleaning process in a vacuum cleaner Download PDF

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Publication number
EP3730024A1
EP3730024A1 EP19170577.1A EP19170577A EP3730024A1 EP 3730024 A1 EP3730024 A1 EP 3730024A1 EP 19170577 A EP19170577 A EP 19170577A EP 3730024 A1 EP3730024 A1 EP 3730024A1
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EP
European Patent Office
Prior art keywords
filter
reference value
vacuum cleaner
cleaning
value
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.)
Granted
Application number
EP19170577.1A
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German (de)
French (fr)
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EP3730024B1 (en
Inventor
Xaver HANSLMEIER
Svenja Müller
Rainer Stahl
Dominik Wenning
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Hilti AG
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Hilti AG
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP19170577.1A priority Critical patent/EP3730024B1/en
Priority to DK19170577.1T priority patent/DK3730024T3/en
Priority to CN202080020621.XA priority patent/CN113556967B/en
Priority to PCT/EP2020/060122 priority patent/WO2020216628A1/en
Priority to US17/442,851 priority patent/US20220183523A1/en
Priority to JP2021561894A priority patent/JP7331133B2/en
Publication of EP3730024A1 publication Critical patent/EP3730024A1/en
Application granted granted Critical
Publication of EP3730024B1 publication Critical patent/EP3730024B1/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
    • 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
    • A47L9/19—Means for monitoring filtering operation
    • 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
    • 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
    • A47L9/2821—Pressure, vacuum level or airflow

Definitions

  • the present invention relates to a method for controlling a cleaning process in a vacuum cleaning device, the vacuum cleaning device comprising at least one filter that is cleaned regularly.
  • the proposed method enables in particular a needs-based, differential pressure-dependent filter cleaning in which the filter aging or the filter wear can also be taken into account.
  • the invention relates to a vacuum cleaner device with which the proposed control method can be carried out.
  • the vacuum cleaner device can in particular comprise a filter cleaning unit.
  • vacuum cleaning devices are known, which are used in particular on construction sites in order to suck off dust that occurs in connection with the use of machine tools, such as for example drilling or grinding devices.
  • construction site vacuums usually comprise a suction head in an upper area and a collecting container for the vacuumed up dust in a lower area of the vacuum cleaner.
  • vacuum cleaners are preferably also referred to as industrial vacuums, construction site vacuums or construction vacuums in the context of the invention.
  • the dust is sucked in with a turbine that is driven by a motor.
  • the turbine generates a suction flow by providing a negative pressure in the dust accumulation device.
  • the turbine can preferably also be designed as a fan.
  • the turbine or the fan are sensitive components of the vacuum cleaning device, which in particular have to be protected from dust. For this reason, filters or filter elements are usually connected upstream of the fan or the turbine in order to filter out any dust that has remained in the suction stream before the dust reaches the area of the turbine or the fan. These filters or filter elements can become clogged with dust over time, which can impair their functionality.
  • filter cleaning is in the sense of Invention preferably referred to as "filter cleaning".
  • filter cleaning When cleaning the filter, the negative pressure in the vacuum cleaner is usually reduced, whereby the suction of the dust is briefly interrupted and the filter is cleaned.
  • the filter cleaning process is usually controlled on a time basis. For example, regularly recurring time intervals can be stored or defined in the vacuum cleaner or a control unit of the vacuum cleaner, in which the filter cleaning is carried out automatically. With such time-based filter cleaning processes, cleaning cycles are carried out at regular intervals. The quality of the cleaning can be described or documented with a cleaning quality.
  • the disadvantage of the filter cleaning method known from the prior art is that the filter wear or filter aging is not taken into account when controlling or initiating the filter cleaning process, so that a significant factor for achieving a high cleaning quality is not taken into account when controlling the cleaning is included. As a result, it can happen that cleaning takes place at unsuitable times or that it is either carried out too early and therefore too often or too seldom and thus after a maximum quality has been exceeded. Too frequent cleaning is disadvantageous insofar as the negative pressure in the vacuum cleaning device has to be reduced during cleaning, which causes a short-term, undesired interruption of dust suction.
  • the object of the present invention is to solve the problems described above and to provide a method for controlling a cleaning process in a vacuum cleaning device, with which a needs-based filter cleaning with efficiency check is made possible and in which the control and initiation of a cleaning process taking into account the filter wear or the Filter aging occurs.
  • filter cleaning can be provided, which enables an efficiency check and, surprisingly, a consideration of filter wear or filter aging.
  • the consideration of the filter wear or the filter aging is made possible in particular by adapting the reference value, which can be maintained or changed as a function of a current pressure value that is determined in the vacuum cleaner.
  • a particular advantage of the invention is that the filter cleaning is controlled as a function of the differential pressure, i.e. caused, will. This advantageously enables filter wear and / or filter aging to be taken into account when controlling the filter cleaning.
  • a first reference value is first established.
  • This reference value preferably describes the state of the filter or of the filter elements forming the filter.
  • the first reference value describes a state of the filter or the filter elements with regard to aging or wear.
  • This state of the filters or the filter elements can advantageously correspond to the quality of the filter cleaning, so that statements about the quality of the filter cleaning can preferably be derived from the first reference value.
  • the first reference value is preferably determined before or when the vacuum cleaner is started up, so that it preferably represents the state of the filter or the filter elements at the start of the vacuum cleaner's suction operation.
  • the first reference value is determined after a predetermined operating time or after performing a certain number of cleaning cycles, so that the first reference value preferably describes the state of the filter or the filter elements after a short operating time of the vacuum cleaner device. It can also be preferred in the context of the invention that the first reference value is determined or checked by determining a differential pressure or flow resistance value and subtracting this differential pressure or flow resistance value from a maximum differential pressure or flow resistance value.
  • the reference value describes a state which is determined when the vacuum cleaner is switched on and which is provided as a target value for further cleaning.
  • this target value can be corrected upwards or downwards as required and depending on the condition of the filter by using the method steps mentioned, so that in the context of the present invention, in particular, the target value for filter cleaning or the filter cleaning quality is adjusted.
  • the first reference value can be established as a function of operating parameters that can be determined in relation to the vacuum cleaner and its operation. In other embodiments of the invention, the first reference value can also be specified as a theoretical value.
  • the first reference value is used as the starting point for the proposed method.
  • the first reference value can preferably correspond to a pressure difference in the air flow or suction volume flow, the pressure difference preferably being measured in the air flow in front of and behind the filter.
  • a pressure difference in the air flow is determined upstream and downstream of the filter.
  • the pressure difference can be larger or smaller, with low degrees of pollution being associated with a low pressure difference and heavy pollution being associated with a large pressure difference.
  • the determined pressure or pressure difference values are further processed using information technology.
  • characteristic values, parameters or comparison data can be calculated and / or derived from the determined pressure or pressure difference values.
  • the determined pressure or pressure difference values are used in order to calculate a flow resistance from them.
  • a c w value can be determined for this purpose, which preferably describes the flow resistance that the filter has in the air or suction flow. It has been shown that the flow resistance value of the filter can be determined particularly well on the basis of the determined pressure or pressure difference values.
  • the c w value of the filter has a particularly high technical informative value with regard to the degree of contamination of the filter or the quality of the filter cleaning.
  • the flow resistance value is determined using the motor characteristic of the vacuum cleaner device.
  • the pressure range which is placed around the first reference value in the context of the present invention, can be established, for example, such that the first reference value lies centrally or essentially centrally in the pressure range. It can also be preferred that the first reference value represents an upper or a lower limit of the pressure range and that the pressure range is in each case limited by a second threshold value.
  • the pressure range that is determined by the reference value can include a differential pressure or a flow resistance value that is considered sufficient for a qualitatively acceptable filter cleaning. This differential pressure value or a flow resistance value can represent a limit of the pressure range, for example
  • a differential pressure value can be determined which describes a current state of the filter.
  • this differential pressure value it is preferably the difference between the pressure conditions in the air or suction flow upstream and downstream of the filter, which is determined in particular by comparing pressure values that are determined in front of and behind the filter in the suction flow.
  • the difference between the pressure ratios in the context of the invention is also referred to as the pressure difference.
  • the determined pressure difference value is used for comparison for subsequent cleaning.
  • the invention advantageously enables the aging process or the clogging of the filter to be taken into account.
  • the determined differential pressure value is compared with the first reference value.
  • the proposed method comprises the following method step: comparison of the previously determined differential pressure value with the first reference value.
  • the differential pressure value is in the previously defined pressure range. Depending on whether the previously determined differential pressure value is in the initially defined pressure range, a second reference value is established, the following case distinction being made here. If the determined differential pressure value lies in the previously defined pressure range, the first reference value is retained. If the determined differential pressure value does not lie in the previously defined pressure range, the first reference value is replaced by the currently determined differential pressure value, whereby the second reference value is obtained.
  • This second reference value is preferably used as a starting point for the following cleaning processes, so that the second reference value is preferably used as the “first reference value” when the method is repeated.
  • the determination of the second reference value is made dependent on how the currently determined differential pressure relates to the first reference value.
  • the differential pressure value is determined by forming the difference between pressure values that can be detected in a suction flow of the vacuum cleaner in front of and behind the filter.
  • the definition of the second reference value preferably corresponds to an adaptation of the reference value, which is carried out in order to advantageously take account of filter aging. If, during this adaptation, the first reference value is replaced by the pressure value determined and the pressure value determined is replaced with a more heavily aged one If the filter corresponds, this greater aging can be taken into account when carrying out or controlling the subsequent filter cleaning processes. In this exemplary embodiment, the proposed vacuum cleaning device will therefore no longer attempt to achieve the original quality of filter cleaning. Up to now this could lead to problems if an automatic filter cleaning control system had always tried to achieve a filter cleaning quality that is to be expected from an unused filter, because filter cleaning processes may have been initiated too often as a result.
  • the filter cleaning processes are rather initiated depending on a current requirement and depending on the filter in terms of its aging and / or wear.
  • the number of filter cleaning processes per unit of time can thus advantageously be optimized so that on the one hand the dust suction process does not have to be interrupted too frequently and on the other hand an efficient suction power of the vacuum cleaner and an efficient filtering of the air flow in the vacuum cleaner is achieved.
  • the second reference value is greater than the first reference value. In other refinements of the method, it can also be preferred that the second reference value is smaller than the first reference value. This is especially the case if an above-average cleaning is found. In other words, in the case of an above-average cleaning, the new, second reference value can also be set below the original first reference value by recalibration. This can be the case, for example, if the cleaning carried out led to such good cleaning results that the filter has a lower level of contamination after the cleaning has been carried out than, for example, when the vacuum cleaner was started. In this respect, it can be preferred in the context of the invention that the method steps are not only run through once, but that they are carried out repeatedly.
  • the invention offers a needs-based, differential pressure-dependent filter cleaning with efficiency check, the efficiency check being achieved in particular by comparing the currently determined differential pressure value with the first reference value, as well as the subsequent definition of the second reference value depending on how the current differential pressure value is related to the first Reference value behaves.
  • the second reference value can preferably correspond to the first reference value or the first reference value can be replaced by the current differential pressure value, whereby a new or changed reference value is obtained, which is preferably referred to as the second reference value.
  • the reference value can be recalibrated if the original, ie the first reference value is not reached.
  • the invention in a second aspect, relates to a filter cleaning device for the vacuum cleaner which can be controlled, ie controlled, using the proposed method.
  • the vacuum cleaner device preferably comprises sensors for determining pressure values, the sensors being arranged in front of and behind the filter in particular in a suction stream of the vacuum cleaner device.
  • the at least two pressure values can be determined, from which the differential pressure value can be formed by forming the difference, that is to say in particular by performing a subtraction.
  • the vacuum cleaner device preferably also comprises a control device for initiating and carrying out the method steps of the control method.
  • Figure 1 shows a preferred embodiment of the method for controlling a cleaning process in a vacuum cleaner.
  • the in Figure 1 The method, which is shown schematically in a flowchart, is a needs-based, differential pressure-dependent filter cleaning process, in which filter aging or filter wear is also taken into account, in that a reference value, which preferably describes a condition of the filter of the vacuum cleaning device, corresponds to any filter aging over time or any filter wear can be adjusted.
  • the reference value which in the context of the invention is preferably also referred to as the first reference value, is preferably used as a control parameter for the proposed control method. It can provide information about a filter status of the vacuum cleaning device, so that the reference value preferably indicates which filter cleaning quality is to be aimed for with the filter cleaning.
  • the reference value can be adapted to a current filter state, the current filter state advantageously being described by a differential pressure value that is determined in the suction flow in front of and behind the filter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cleaning In General (AREA)

Abstract

Die vorliegende Erfindung betrifft ein Verfahren zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung, wobei die Staubsaugvorrichtung mindestens einen Filter umfasst, der regelmäßig abgereinigt wird. Das vorgeschlagene Verfahren ermöglicht insbesondere eine bedarfsgerechte, differenzdruckabhängige Filterabreinigung, bei der auch die Filteralterung bzw. der Filterverschleiß berücksichtig werden kann. In einem zweiten Aspekt betrifft die Erfindung eine Staubsaugvorrichtung, mit der das vorgeschlagenen Steuerungsverfahren durchgeführt werden kann. Dazu kann die Staubsaugvorrichtung insbesondere eine Filterabreinigungseinheit umfassen.The present invention relates to a method for controlling a cleaning process in a vacuum cleaning device, the vacuum cleaning device comprising at least one filter that is cleaned regularly. The proposed method enables in particular a needs-based, differential pressure-dependent filter cleaning in which the filter aging or the filter wear can also be taken into account. In a second aspect, the invention relates to a vacuum cleaning device with which the proposed control method can be carried out. For this purpose, the vacuum cleaner device can in particular comprise a filter cleaning unit.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung, wobei die Staubsaugvorrichtung mindestens einen Filter umfasst, der regelmäßig abgereinigt wird. Das vorgeschlagene Verfahren ermöglicht insbesondere eine bedarfsgerechte, differenzdruckabhängige Filterabreinigung, bei der auch die Filteralterung bzw. der Filterverschleiß berücksichtig werden kann. In einem zweiten Aspekt betrifft die Erfindung eine Staubsaugvorrichtung, mit der das vorgeschlagenen Steuerungsverfahren durchgeführt werden kann. Dazu kann die Staubsaugvorrichtung insbesondere eine Filterabreinigungseinheit umfassen.The present invention relates to a method for controlling a cleaning process in a vacuum cleaning device, the vacuum cleaning device comprising at least one filter that is cleaned regularly. The proposed method enables in particular a needs-based, differential pressure-dependent filter cleaning in which the filter aging or the filter wear can also be taken into account. In a second aspect, the invention relates to a vacuum cleaner device with which the proposed control method can be carried out. For this purpose, the vacuum cleaner device can in particular comprise a filter cleaning unit.

Im Stand der Technik sind Staubsaugvorrichtungen bekannt, die insbesondere auf Baustellen genutzt werden, um in Verbindung mit der Benutzung von Werkzeugmaschinen, wie beispielsweise Bohr- oder Schleifgeräten, auftretenden Staub abzusaugen. Solche sogenannten Baustellensauger umfassen üblicherweise in einem oberen Bereich einen Saugerkopf und in einem unteren Bereich der Staubsaugvorrichtung einen Sammelbehälter für den aufgesaugten Staub. Solche Staubsauger werden im Sinne der Erfindung vorzugsweise auch als Industriesauger, Baustellensauger oder Bausauger bezeichnet.In the prior art, vacuum cleaning devices are known, which are used in particular on construction sites in order to suck off dust that occurs in connection with the use of machine tools, such as for example drilling or grinding devices. Such so-called construction site vacuums usually comprise a suction head in an upper area and a collecting container for the vacuumed up dust in a lower area of the vacuum cleaner. Such vacuum cleaners are preferably also referred to as industrial vacuums, construction site vacuums or construction vacuums in the context of the invention.

Das Einsaugen des Staubs erfolgt bei bekannten Bausaugern mit einer Turbine, die mit einem Motor angetrieben wird. Insbesondere erzeugt die Turbine einen Absaugstrom, indem in der Staubsauvorichtung ein Unterdruck bereitgestellt wird. Vorzugsweise kann die Turbine auch als Gebläse ausgebildet sein. Die Turbine bzw. das Gebläse sind empfindliche Bauteile der Staubsaugvorrichtung, die insbesondere vor Staub geschützt werden müssen. Daher sind dem Gebläse oder der Turbine üblicherweise Filter oder Filterelemente vorgeschaltet, um etwaigen Staub, der im Absaugstrom verblieben ist, aus dem Absaugstrom herauszufiltern, bevor der Staub in den Bereich der Turbine oder des Gebläses gelangt. Diese Filter oder Filterelemente können sich im Laufe der Zeit mit Staub zusetzen, wodurch ihre Funktionalität beeinträchtigt werden kann.In known construction vacuum cleaners, the dust is sucked in with a turbine that is driven by a motor. In particular, the turbine generates a suction flow by providing a negative pressure in the dust accumulation device. The turbine can preferably also be designed as a fan. The turbine or the fan are sensitive components of the vacuum cleaning device, which in particular have to be protected from dust. For this reason, filters or filter elements are usually connected upstream of the fan or the turbine in order to filter out any dust that has remained in the suction stream before the dust reaches the area of the turbine or the fan. These filters or filter elements can become clogged with dust over time, which can impair their functionality.

Konventionelle Baustellensauger, die aus dem Stand der Technik bekannt sind, verfügen üblicherweise über eine Filterabreinigungseinheit, mit der der Filter der Staubsaugvorrichtung in regelmäßigen Abständen gereinigt werden kann. Eine solche Filterreinigung wird im Sinne der Erfindung bevorzugt als "Filterabreinigung" bezeichnet. Zumeist wird bei der Filterabreinigung der Unterdruck in der Staubsaugvorrichtung reduziert, wodurch das Einsaugen des Staubs kurzfristig unterbrochen und der Filter gereinigt wird. In einigen Vorrichtungen ist vorgesehen, die Filterelemente mit einem Gegenstrom durchzuspülen und so einen gegebenenfalls vorhandenen Filterkuchen zu lösen. Üblicherweise wird der Filterreinigungsprozess zeitbasiert gesteuert. Beispielsweise können in der Staubsaugvorrichtung bzw. einer Steuereinheit der Staubsaugvorrichtung regelmäßig wiederkehrende Zeitabstände hinterlegt oder definiert sein, in denen die Filterabreinigung automatisch durchgeführt wird. Bei solchen zeitbasierten Filterabreinigungsvorgängen werden somit in regelmäßigen Zeitabständen Abreinigungszyklen durchgeführt. Die Qualität der Abreinigung kann mit einer Abreinigungsgüte beschrieben bzw. dokumentiert werden.Conventional construction site vacuums, which are known from the prior art, usually have a filter cleaning unit with which the filter of the vacuum cleaner can be cleaned at regular intervals. Such filter cleaning is in the sense of Invention preferably referred to as "filter cleaning". When cleaning the filter, the negative pressure in the vacuum cleaner is usually reduced, whereby the suction of the dust is briefly interrupted and the filter is cleaned. In some devices, provision is made for the filter elements to be flushed through with a countercurrent and thus to loosen any filter cake that may be present. The filter cleaning process is usually controlled on a time basis. For example, regularly recurring time intervals can be stored or defined in the vacuum cleaner or a control unit of the vacuum cleaner, in which the filter cleaning is carried out automatically. With such time-based filter cleaning processes, cleaning cycles are carried out at regular intervals. The quality of the cleaning can be described or documented with a cleaning quality.

Nachteilig an den aus dem Stand der Technik bekannten Filterabreinigungsverfahren ist jedoch, dass eine Berücksichtigung des Filterverschleißes bzw. der Filteralterung bei der Steuerung bzw. Veranlassung des Filterabreinigungsprozesses nicht stattfindet, so dass ein wesentlicher Faktor für die Erreichung einer hohen Abreinigungsqualität bei der Steuerung der Abreinigung nicht einbezogen wird. Dadurch kann es vorkommen, dass die Abreinigung zu nicht geeigneten Zeiten stattfindet oder dass sie entweder zu früh und damit zu häufig oder zu selten und damit nach Überschreiten eines Qualitätsmaximums durchgeführt wird. Eine zu häufige Abreinigung ist insofern nachteilig, dass bei der Abreinigung der Unterdruck in der Staubsaugvorrichtung reduziert werden muss, wodurch eine kurzfristige, unerwünschte Unterbrechung des Staubeinsaugens bewirkt wird. Eine zu späte bzw. zu selten durchgeführte Abreinigung des Filters ist nachteilig, weil dadurch Zeiträume entstehen können, in denen der Filter bereits stark zugesetzt ist, so dass gegebenenfalls die Saugleistung der Staubsaugvorrichtung beeinträchtigt ist. Dadurch kann die Filterwirkung herabgesetzt werden und Staub kann vermehrt in den Bereich der Turbine bzw. des Gebläses gelangen. Dies kann wiederum zu Beschädigungen oder Beeinträchtigungen von Turbine und/oder Gebläse führen.The disadvantage of the filter cleaning method known from the prior art, however, is that the filter wear or filter aging is not taken into account when controlling or initiating the filter cleaning process, so that a significant factor for achieving a high cleaning quality is not taken into account when controlling the cleaning is included. As a result, it can happen that cleaning takes place at unsuitable times or that it is either carried out too early and therefore too often or too seldom and thus after a maximum quality has been exceeded. Too frequent cleaning is disadvantageous insofar as the negative pressure in the vacuum cleaning device has to be reduced during cleaning, which causes a short-term, undesired interruption of dust suction. Cleaning the filter too late or too seldom is disadvantageous because it can result in periods of time in which the filter is already heavily clogged, so that the suction power of the vacuum cleaner may be impaired. As a result, the filter effect can be reduced and dust can increasingly get into the area of the turbine or the fan. This in turn can lead to damage or impairment of the turbine and / or fan.

Aufgabe der vorliegenden Erfindung ist es, die vorstehend beschriebene Probleme zu lösen und ein Verfahren zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung bereitzustellen, mit dem eine bedarfsgereichte Filterabreinigung mit Effizienzscheck ermöglicht wird und bei dem die Steuerung und Veranlassung eines Abreinigungsprozesses unter Berücksichtigung des Filterverschleißes bzw. der Filteralterung erfolgt.The object of the present invention is to solve the problems described above and to provide a method for controlling a cleaning process in a vacuum cleaning device, with which a needs-based filter cleaning with efficiency check is made possible and in which the control and initiation of a cleaning process taking into account the filter wear or the Filter aging occurs.

Die Aufgabe wird dadurch gelöst durch den Gegenstand der unabhängigen Ansprüche. Vorteilhafte Ausführungsformen zu dem Gegenstand der unabhängigen Ansprüche finden sich in den abhängigen Unteransprüchen.The object is achieved by the subject matter of the independent claims. Advantageous embodiments relating to the subject matter of the independent claims can be found in the dependent subclaims.

Die Aufgabe wird hierbei gelöst durch ein Verfahren zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung, wobei die Staubsaugvorrichtung mindestens einen Filter umfasst, der regelmäßig abgereinigt wird. Das Verfahren wird durch folgende Verfahrensschritte gekennzeichnet:

  1. a) Festlegung eines ersten Referenzwertes, der einen Druckbereich definiert,
  2. b) Ermittlung eines Differenzdruckwertes, der einen aktuellen Zustand des Filters beschreibt,
  3. c) Bestimmung, ob der Differenzdruckwert in dem unter a) definierten Druckbereich liegt,
  4. d) Festlegung eines zweiten Referenzwertes, indem entweder der erste Referenzwert beibehalten wird oder der erste Referenzwert durch den unter b) ermittelten Differenzdruckwertes ersetzt wird, wobei die Festlegung des zweiten Referenzwerts in Abhängigkeit davon erfolgt, ob der unter b) ermittelte Differenzdruckwert in dem unter a) definierten Druckbereich liegt.
The object is achieved by a method for controlling a cleaning process in a vacuum cleaner, the vacuum cleaner comprising at least one filter that is cleaned regularly. The process is characterized by the following process steps:
  1. a) definition of a first reference value which defines a pressure range,
  2. b) Determination of a differential pressure value that describes the current state of the filter,
  3. c) Determination of whether the differential pressure value is in the pressure range defined under a),
  4. d) Establishing a second reference value, either by maintaining the first reference value or by replacing the first reference value with the differential pressure value determined under b), the second reference value being determined depending on whether the differential pressure value determined under b) is within the range under a ) defined pressure range.

Mit dem vorgeschlagenen Steuerungsverfahren kann eine wirksame, leistungsstarke und bedarfsgerechte Filterabreinigung bereitgestellt werden, die einen Effizienzcheck sowie überraschenderweise eine Berücksichtigung von Filterverschleiß bzw. Filteralterung ermöglicht. Die Berücksichtigung des Filterverschleißes bzw. der Filteralterung wird insbesondere durch die Anpassung des Referenzwertes ermöglicht, der in Abhängigkeit eines aktuellen Druckwertes, der in der Staubsaugvorrichtung ermittelt wird, beibehalten oder geändert werden kann. Ein besonderer Vorteil der Erfindung besteht darin, dass die Filterabreinigung differenzdruckabhängig gesteuert, d.h. veranlasst, wird. Dadurch wird vorteilhafterweise ermöglicht, dass der Filterverschleiß und/oder die Filteralterung bei der Steuerung der Filterabreinigung berücksichtigt werden kann.With the proposed control method, effective, high-performance and needs-based filter cleaning can be provided, which enables an efficiency check and, surprisingly, a consideration of filter wear or filter aging. The consideration of the filter wear or the filter aging is made possible in particular by adapting the reference value, which can be maintained or changed as a function of a current pressure value that is determined in the vacuum cleaner. A particular advantage of the invention is that the filter cleaning is controlled as a function of the differential pressure, i.e. caused, will. This advantageously enables filter wear and / or filter aging to be taken into account when controlling the filter cleaning.

Im Kontext der vorliegenden Erfindung wird zunächst ein erster Referenzwert festgelegt. Dieser Referenzwert beschreibt vorzugsweise den Zustand des Filters oder der den Filter bildendenden Filterelemente. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der erste Referenzwert einen Zustand des Filters bzw. der Filterelemente in Bezug auf die Alterung bzw. den Verschleiß beschreibt. Dieser Zustand der Filter bzw. der Filterelemente kann vorteilhafterweise mit der Güte der Filterabreinigung korrespondieren, so dass von dem ersten Referenzwert vorzugsweise Aussagen über die Güte der Filterabreinigung abgeleitet werden können. Der erste Referenzwert wird bevorzugt vor oder bei Inbetriebnahme der Staubsaugvorrichtung ermittelt, so dass er vorzugsweise den Zustand des Filters oder der Filterelemente zu Beginn des Saugbetriebs der Staubsaugvorrichtung darstellt. Es kann im Sinne der Erfindung auch bevorzugt sein, dass erste Referenzwert nach einer zuvor festgelegten Betriebszeit oder nach Durchführung einer bestimmten Anzahl von Abreinigungszyklen ermittelt wird, so dass der erste Referenzwert vorzugsweise den Zustand des Filters oder der Filterelemente nach einer kurzen Betriebszeit der Staubsaugvorrichtung beschreibt. Es kann im Sinne der Erfindung auch bevorzugt sein, dass der erste Referenzwert dadurch festgelegt oder überprüft wird, indem ein Differenzdruck- bzw. ein Strömungswiderstandswert ermittelt wird und dieser Differenzdruck- bzw. Strömungswiderstandswert von einem maximalen Differenzdruck- bzw. einen Strömungswiderstandswert abgezogen wird.In the context of the present invention, a first reference value is first established. This reference value preferably describes the state of the filter or of the filter elements forming the filter. In the context of the invention, it is particularly preferred that the first reference value describes a state of the filter or the filter elements with regard to aging or wear. This state of the filters or the filter elements can advantageously correspond to the quality of the filter cleaning, so that statements about the quality of the filter cleaning can preferably be derived from the first reference value. The first reference value is preferably determined before or when the vacuum cleaner is started up, so that it preferably represents the state of the filter or the filter elements at the start of the vacuum cleaner's suction operation. In the context of the invention, it can also be preferred that the first reference value is determined after a predetermined operating time or after performing a certain number of cleaning cycles, so that the first reference value preferably describes the state of the filter or the filter elements after a short operating time of the vacuum cleaner device. It can also be preferred in the context of the invention that the first reference value is determined or checked by determining a differential pressure or flow resistance value and subtracting this differential pressure or flow resistance value from a maximum differential pressure or flow resistance value.

In einer ganz besonders bevorzugten Ausführungsform der Erfindung beschreibt der Referenzwert einen Zustand, der beim Einschalten des Staubsaugers ermittelt wird und der als Zielwert für weitere Abreinigungen vorsehen ist. Vorteilhafterweise kann dieser Zielwert durch Anwendung der genannten Verfahrensschritte je nach Bedarf und in Abhängigkeit von dem Zustand des Filters nach oben oder nach unten korrigiert werden, so dass im Kontext der vorliegenden Erfindung insbesondere eine Anpassung des Zielwertes für die Filterabreinigung bzw. die Filterabreinigungsgüte erfolgt.In a particularly preferred embodiment of the invention, the reference value describes a state which is determined when the vacuum cleaner is switched on and which is provided as a target value for further cleaning. Advantageously, this target value can be corrected upwards or downwards as required and depending on the condition of the filter by using the method steps mentioned, so that in the context of the present invention, in particular, the target value for filter cleaning or the filter cleaning quality is adjusted.

Es wird im Kontext der vorliegenden Erfindung davon ausgegangen, dass bei Differenzdruck- bzw. Strömungswiderstandswerten oberhalb eines minimalen Differenzdruck- bzw. eines Strömungswiderstandswertes, der für eine akzeptable Filterabreinigung steht, eine akzeptable Filterabreinigung durchgeführt wird. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der erste Referenzwert in Abhängigkeit von Betriebsparametern, die in Bezug auf die Staubsaugvorrichtung und ihren Betrieb ermittelt werden können, festgelegt werden kann. In anderen Ausgestaltungen der Erfindungen kann der erste Referenzwert auch als theoretischer Wert vorgegeben werden.It is assumed in the context of the present invention that an acceptable filter cleaning is carried out in the case of differential pressure or flow resistance values above a minimum differential pressure or flow resistance value which stands for an acceptable filter cleaning. In the context of the invention, it is particularly preferred that the first reference value can be established as a function of operating parameters that can be determined in relation to the vacuum cleaner and its operation. In other embodiments of the invention, the first reference value can also be specified as a theoretical value.

Es ist im Sinne der Erfindung bevorzugt, dass der erste Referenzwert als Ausgangspunkt für das vorgeschlagene Verfahren verwendet wird. Der erste Referenzwert kann vorzugsweise einer Druckdifferenz im Luftstrom oder Absaugvolumenstrom entsprechen, wobei die Druckdifferenz vorzugsweise im Luftstrom vor und hinter dem Filter gemessen wird. Mit anderen Worten ist es im Sinne der Erfindung bevorzugt, einen Druck im Luft- oder Absaugstrom an unterschiedlichen Punkten in der Staubsaugvorrichtung zu ermitteln, wobei ein erster Messpunkt beispielsweise im Luftstrom vor Durchgang des Luftstroms durch den Filter vorliegen kann und ein zweiter Messpunkt im Luftstrom hinter dem Filter bzw. nach Durchgang des Luftstroms durch den Filter vorliegen kann. Mit noch anderen Worten ist es im Sinne der Erfindung bevorzugt, dass eine Druckdifferenz im Luftstrom vor und hinter dem Filter ermittelt wird. Je nach Filterverunreinigung wird die Druckdifferenz größer oder kleiner ausfallen, wobei geringe Verschmutzungsgrade mit einer geringen Druckdifferenz assoziiert werden und starke Verschmutzungen mit einer großen Druckdifferenz.For the purposes of the invention, it is preferred that the first reference value is used as the starting point for the proposed method. The first reference value can preferably correspond to a pressure difference in the air flow or suction volume flow, the pressure difference preferably being measured in the air flow in front of and behind the filter. In other words, according to the invention, it is preferred to determine a pressure in the air or suction flow at different points in the vacuum cleaner, with a first measuring point, for example, in the air flow before the air flow passes through the filter and a second measuring point in the air flow behind the filter or after passage of the air flow through the filter. In other words, it is preferred in the context of the invention that a pressure difference in the air flow is determined upstream and downstream of the filter. Depending on the filter contamination the pressure difference can be larger or smaller, with low degrees of pollution being associated with a low pressure difference and heavy pollution being associated with a large pressure difference.

Wenn eine geringe Druckdifferenz festgestellt wird, kann dies auf einen geringen Verschmutzungs- oder Zusetzungsgrad des Filters hindeuten, was für eine gute Qualität des Abreinigungsvorgangs spricht. Bei Feststellung einer hohen Druckdifferenz kann auf einen hohen Verschmutzungs- oder Zusetzungsgrad des Filters geschlossen werden, was für eine eingeschränkte Abreinigungsleistung und eine reduzierte Qualität des Abreinigungsvorgangs spricht.If a small pressure difference is detected, this can indicate a low degree of contamination or clogging of the filter, which indicates a good quality of the cleaning process. If a high pressure difference is determined, a high degree of contamination or clogging of the filter can be concluded, which speaks for a restricted cleaning performance and a reduced quality of the cleaning process.

Es kann im Sinne der Erfindung auch vorgesehen sein, dass die ermittelten Druck- bzw. Druckdifferenzwerte informationstechnologisch weiterverarbeitet werden. Beispielsweise können Kennwerte, Kenngrößen oder Vergleichsdaten aus den ermittelten Druck- bzw. Druckdifferenzwerten berechnet und/oder abgeleitet werden. In einer ganz besonders bevorzugten Ausführungsform der Erfindung werden die ermittelten Druck- bzw. Druckdifferenzwerte verwendet, um aus ihnen einen Strömungswiderstand zu berechnen. Insbesondere kann dazu ein cw-Wert ermittelt werden, der vorzugsweise den Strömungswiderstand beschreibt, den der Filter im Luft- oder Absaugstrom aufweist. Es hat sich gezeigt, dass der Strömungswiderstandswert des Filters besonders gut auf Grundlage der ermittelten Druck- bzw. Druckdifferenzwerten ermittelt werden kann. Darüber hinaus hat der cw-Wert des Filters eine besonders hohe technische Aussagekraft in Bezug auf den Verschmutzungsgrad des Filters bzw. die Güte der Filterabreinigung. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der Strömungswiderstandwert unter Verwendung der Motorkennlinie der Staubsaugvorrichtung ermittelt wird.In the context of the invention, it can also be provided that the determined pressure or pressure difference values are further processed using information technology. For example, characteristic values, parameters or comparison data can be calculated and / or derived from the determined pressure or pressure difference values. In a particularly preferred embodiment of the invention, the determined pressure or pressure difference values are used in order to calculate a flow resistance from them. In particular, a c w value can be determined for this purpose, which preferably describes the flow resistance that the filter has in the air or suction flow. It has been shown that the flow resistance value of the filter can be determined particularly well on the basis of the determined pressure or pressure difference values. In addition, the c w value of the filter has a particularly high technical informative value with regard to the degree of contamination of the filter or the quality of the filter cleaning. For the purposes of the invention, it is particularly preferred that the flow resistance value is determined using the motor characteristic of the vacuum cleaner device.

Der Druckbereich, der im Kontext der vorliegenden Erfindung um den ersten Referenzwert gelegt wird, kann beispielsweise so festgelegt werden, dass der erste Referenzwert mittig oder im Wesentlichen mittig in dem Druckbereich liegt. Es kann auch bevorzugt sein, dass der erste Referenzwert eine obere oder eine untere Grenze des Druckbereichs darstellt und dass der Druckbereich jeweils von einem zweiten Schwellenwert begrenzt wird. Beispielsweise kann der Druckbereich, der durch den Referenzwert festgelegt wird, einen Differenzdruck- bzw. einen Strömungswiderstandswert umfassen, der als ausreichend für eine qualitativ akzeptable Filterabreinigung angesehen wird. Dieser Differenzdruck- bzw. einen Strömungswiderstandswert kann beispielsweise eine Grenze des Druckbereichs darstellenThe pressure range, which is placed around the first reference value in the context of the present invention, can be established, for example, such that the first reference value lies centrally or essentially centrally in the pressure range. It can also be preferred that the first reference value represents an upper or a lower limit of the pressure range and that the pressure range is in each case limited by a second threshold value. For example, the pressure range that is determined by the reference value can include a differential pressure or a flow resistance value that is considered sufficient for a qualitatively acceptable filter cleaning. This differential pressure value or a flow resistance value can represent a limit of the pressure range, for example

Nach einer zuvor festgelegten Betriebszeit oder nach Durchführung einer bestimmten Anzahl von Abreinigungszyklen kann im Kontext der vorliegenden Erfindung ein Differenzdruckwert ermittelt werden, der einen aktuellen Zustand des Filters beschreibt. Bei diesem Differenzdruckwert handelt es sich bevorzugt um den Unterschied zwischen den Druckverhältnissen im Luft- oder Absaugstrom vor und hinter dem Filter, der insbesondere durch den Vergleich von Druckwerten, die vor und hinter dem Filter im Absaugstrom ermittelt werden, bestimmt wird. Vorzugsweise wird der Unterschied zwischen den Druckverhältnissen im Sinne der Erfindung auch als Druckdifferenz bezeichnet. Es ist im Sinne der Erfindung ganz besonders bevorzugt, dass nach einer bestimmten Betriebszeit oder nach Durchführung einer bestimmten Anzahl von Abreinigungsvorgängen ein Vergleich zwischen dem ursprünglichen festgelegten ersten Referenzwert und dem ermittelten Druckdifferenzwert durchgeführt wird. Weichen die beiden Werte von einem vordefinierten Schwellenwert ab, so wird der ermittelten Druckdifferenzwert zum Vergleich für Folgeabreinigungen herangezogen. Durch diesen Vergleich ermöglicht die Erfindung vorteilhafterweise die Berücksichtigung des Alterungsprozesses bzw. des Zusetzens des Filters. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der ermittelte Differenzdruckwert mit dem ersten Referenzwert verglichen wird. Somit umfasst das vorgeschlagene Verfahren in einer bevorzugten Ausgestaltung den folgenden Verfahrensschritt: Vergleich des zuvor ermittelten Differenzdruckwertes mit dem ersten Referenzwert.In the context of the present invention, after a predetermined operating time or after carrying out a specific number of cleaning cycles, a differential pressure value can be determined which describes a current state of the filter. At this differential pressure value it is preferably the difference between the pressure conditions in the air or suction flow upstream and downstream of the filter, which is determined in particular by comparing pressure values that are determined in front of and behind the filter in the suction flow. Preferably, the difference between the pressure ratios in the context of the invention is also referred to as the pressure difference. In the context of the invention, it is particularly preferred that after a certain operating time or after carrying out a certain number of cleaning processes, a comparison is made between the originally established first reference value and the determined pressure difference value. If the two values deviate from a predefined threshold value, the determined pressure difference value is used for comparison for subsequent cleaning. With this comparison, the invention advantageously enables the aging process or the clogging of the filter to be taken into account. In the context of the invention, it is particularly preferred that the determined differential pressure value is compared with the first reference value. Thus, in a preferred embodiment, the proposed method comprises the following method step: comparison of the previously determined differential pressure value with the first reference value.

Anschließend wird bestimmt, ob der Differenzdruckwert in dem zuvor definierten Druckbereich liegt. In Abhängigkeit davon, ob der zuvor ermittelte Differenzdruckwert in dem anfangs definierten Druckbereich liegt, wird ein zweiter Referenzwert festgelegt, wobei hier folgende Fallunterscheidung vorgenommen wird. Wenn der ermittelte Differenzdruckwert in dem zuvor definierten Druckbereich liegt, wird der erste Referenzwert beibehalten. Wenn der ermittelte Differenzdruckwert nicht in dem zuvor definierten Druckbereich liegt, wird der erste Referenzwert durch den aktuell ermittelten Differenzdruckwert ersetzt, wodurch der zweite Referenzwert erhalten wird. Dieser zweite Referenzwert wird vorzugsweise als Ausgangspunkt für die folgenden Abreinigungsprozesse verwendet, so dass der zweite Referenzwert bei Wiederholung des Verfahrens bevorzugt als "erster Referenzwert" verwendet wird. Es kann im Sinne der Erfindung auch bevorzugt sein, dass die Festlegung des zweiten Referenzwertes davon abhängig gemacht wird, wie sich der aktuell ermittelte Differenzdruck zum ersten Referenzwert verhält. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der Differenzdruckwert durch Differenzbildung von Druckwerten ermittelt wird, die in einem Absaugstrom der Staubsaugvorrichtung vor und hinter dem Filter erfassbar sind.It is then determined whether the differential pressure value is in the previously defined pressure range. Depending on whether the previously determined differential pressure value is in the initially defined pressure range, a second reference value is established, the following case distinction being made here. If the determined differential pressure value lies in the previously defined pressure range, the first reference value is retained. If the determined differential pressure value does not lie in the previously defined pressure range, the first reference value is replaced by the currently determined differential pressure value, whereby the second reference value is obtained. This second reference value is preferably used as a starting point for the following cleaning processes, so that the second reference value is preferably used as the “first reference value” when the method is repeated. In the context of the invention, it can also be preferred that the determination of the second reference value is made dependent on how the currently determined differential pressure relates to the first reference value. In the context of the invention, it is particularly preferred that the differential pressure value is determined by forming the difference between pressure values that can be detected in a suction flow of the vacuum cleaner in front of and behind the filter.

Die Festlegung des zweiten Referenzwertes entspricht im Sinne der Erfindung bevorzugt einer Anpassung des Referenzwerts, die durchgeführt wird, um vorteilhafterweise eine Berücksichtigung der Filteralterung zu erreichen. Wenn bei dieser Anpassung der erste Referenzwert durch den ermittelten Druckwert ersetzt wird und der ermittelte Druckwert mit einem stärker gealterten Filter korrespondiert, kann diese stärkere Alterung bei der Durchführung bzw. der Steuerung der nachfolgenden Filterabreinigungsprozesse berücksichtigt werden. Die vorgeschlagene Staubsaugvorrichtung wird in diesem Ausführungsbeispiel daher nicht mehr versuchen, die ursprüngliche Güte der Filterabreinigung zu erreichen. Dies konnte bisher zu Problemen führen, wenn eine automatische Filterabreinigungssteuerung stets versucht hatte, eine Filterabreinigungsgüte, wie sie von einem unbenutzten Filter zu erwarten ist, zu erreichen, weil dadurch ggf. zu häufig Filterabreinigungsprozesse initiiert wurden. Bei einer Staubsaugvorrichtung, die gemäß dem vorgeschlagenen Steuerungsverfahren mit einer Anpassung der zu erreichenden Filterabreinigungsgüte an den aktuellen Filterzustand arbeitet, werden die Filterabreinigungsprozesse vielmehr in Abhängigkeit von einem aktuellen Bedarf und in Abhängigkeit des Filters in Bezug auf seine Alterung und/oder seinen Verschleiß veranlasst. Damit kann vorteilhafterweise die Anzahl von Filterabreinigungsprozessen pro Zeiteinheit optimiert werden, so dass einerseits der Staubsabsaugprozess nicht zu häufig unterbrochen werden muss und andererseits eine effiziente Saugleistung der Staubsaugvorrichtung und eine effiziente Filterung des Luftstroms in der Staubsaugvorrichtung erreicht wird.In the context of the invention, the definition of the second reference value preferably corresponds to an adaptation of the reference value, which is carried out in order to advantageously take account of filter aging. If, during this adaptation, the first reference value is replaced by the pressure value determined and the pressure value determined is replaced with a more heavily aged one If the filter corresponds, this greater aging can be taken into account when carrying out or controlling the subsequent filter cleaning processes. In this exemplary embodiment, the proposed vacuum cleaning device will therefore no longer attempt to achieve the original quality of filter cleaning. Up to now this could lead to problems if an automatic filter cleaning control system had always tried to achieve a filter cleaning quality that is to be expected from an unused filter, because filter cleaning processes may have been initiated too often as a result. In the case of a vacuum cleaner that works according to the proposed control method with an adaptation of the filter cleaning quality to be achieved to the current filter condition, the filter cleaning processes are rather initiated depending on a current requirement and depending on the filter in terms of its aging and / or wear. The number of filter cleaning processes per unit of time can thus advantageously be optimized so that on the one hand the dust suction process does not have to be interrupted too frequently and on the other hand an efficient suction power of the vacuum cleaner and an efficient filtering of the air flow in the vacuum cleaner is achieved.

Es ist im Sinne der Erfindung bevorzugt, dass der zweite Referenzwert größer ist als der erste Referenzwert. Es kann in anderen Ausgestaltungen des Verfahrens auch bevorzugt sein, dass der zweite Referenzwert kleiner ist als der erste Referenzwert. Das ist insbesondere dann der Fall, wenn eine überdurchschnittlich gute Abreinigung festgestellt wird. Mit anderen Worten kann im Falle einer überdurchschnittlichen guten Abreinigung der neue, zweite Referenzwert durch eine Rekalibrierung auch unter den ursprünglichen ersten Referenzwert gesetzt werden. Das kann beispielsweise dann der Fall sein, wenn die vorgenommenen Abreinigungen zu so guten Abreinigungsergebnisse geführt haben, dass der Filter nach Durchführung der Abreinigung einen geringeren Verschmutzungsgrad aufweist als zum Beispiel bei Start der Staubsaugvorrichtung. Insofern kann es im Sinne der Erfindung bevorzugt sein, dass die Verfahrensschritte nicht nur einmal durchlaufen werden, sondern dass sie wiederholt durchgeführt werden.It is preferred within the meaning of the invention that the second reference value is greater than the first reference value. In other refinements of the method, it can also be preferred that the second reference value is smaller than the first reference value. This is especially the case if an above-average cleaning is found. In other words, in the case of an above-average cleaning, the new, second reference value can also be set below the original first reference value by recalibration. This can be the case, for example, if the cleaning carried out led to such good cleaning results that the filter has a lower level of contamination after the cleaning has been carried out than, for example, when the vacuum cleaner was started. In this respect, it can be preferred in the context of the invention that the method steps are not only run through once, but that they are carried out repeatedly.

Die Erfindung bietet eine bedarfsgerechte, differenzdruckabhängige Filterabreinigung mit Effizienzcheck, wobei der Effizienzcheck insbesondere durch den Vergleich des aktuell ermittelten Differenzdruckwertes mit dem ersten Referenzwert erreicht wird, sowie der anschließenden Festlegung des zweiten Referenzwerts in Abhängigkeit davon, wie sich der aktuelle Differenzdruckwert in Bezug auf den ersten Referenzwert verhält. Vorzugsweise kann der zweite Referenzwert dem ersten Referenzwert entsprechen oder der erste Referenzwert kann durch den aktuellen Differenzdruckwert ersetzt werden, wodurch ein neuer oder veränderter Referenzwert erhalten wird, der vorzugsweise als zweiter Referenzwert bezeichnet wird. Vorzugsweise umfasst das vorgeschlagene Verfahren eine Referenzwertanpassung, um den Alterungsprozess bzw. den Verschleiß des Filters zu berücksichtigen. In einer bevorzugten Ausführungsform der Erfindung kann der Referenzwert rekalibiert werden, wenn es zu einem Unterschreiten des ursprünglichen, d.h. des ersten Referenzwerts kommt.The invention offers a needs-based, differential pressure-dependent filter cleaning with efficiency check, the efficiency check being achieved in particular by comparing the currently determined differential pressure value with the first reference value, as well as the subsequent definition of the second reference value depending on how the current differential pressure value is related to the first Reference value behaves. The second reference value can preferably correspond to the first reference value or the first reference value can be replaced by the current differential pressure value, whereby a new or changed reference value is obtained, which is preferably referred to as the second reference value. Preferably includes the proposed method a reference value adjustment to take into account the aging process or the wear of the filter. In a preferred embodiment of the invention, the reference value can be recalibrated if the original, ie the first reference value is not reached.

In einem zweiten Aspekt betrifft die Erfindung eine Filterabreinigung der Staubsaugvorrichtung, die mit dem vorgeschlagenen Verfahren steuerbar ist, d.h. gesteuert werden kann. Die Staubsaugvorrichtung umfasst vorzugsweise Sensoren zur Ermittlung von Druckwerten, wobei die Sensoren insbesondere in einem Absaugstrom der Staubsaugvorrichtung vor und hinter dem Filter angeordnet sind. Dadurch können die mindestens zwei Druckwerte bestimmt werden, aus denen durch Differenzbildung, also insbesondere durch Durchführung einer Subtraktion, der Differenzdruckwert gebildet werden kann. Vorzugsweise umfasst die Staubsaugvorrichtung darüber hinaus eine Steuereinrichtung zur Veranlassung und Durchführung der Verfahrensschritte des Steuerverfahrens.In a second aspect, the invention relates to a filter cleaning device for the vacuum cleaner which can be controlled, ie controlled, using the proposed method. The vacuum cleaner device preferably comprises sensors for determining pressure values, the sensors being arranged in front of and behind the filter in particular in a suction stream of the vacuum cleaner device. As a result, the at least two pressure values can be determined, from which the differential pressure value can be formed by forming the difference, that is to say in particular by performing a subtraction. The vacuum cleaner device preferably also comprises a control device for initiating and carrying out the method steps of the control method.

Weitere Vorteile der Erfindung ergeben sich aus der folgenden Figurenbeschreibung. In der Figur sind verschiedene Ausführungsbeispiele der vorliegenden Erfindung dargestellt. Die Figur, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages of the invention emerge from the following description of the figures. Various exemplary embodiments of the present invention are shown in the figure. The figure, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.

In den Figuren sind gleiche und gleichartige Komponenten mit gleichen Bezugszeichen beziffert. Es zeigen:

Fig. 1
Ansicht einer bevorzugten Ausführungsform des Verfahrens
In the figures, the same and similar components are numbered with the same reference symbols. Show it:
Fig. 1
View of a preferred embodiment of the method

Ausführungsbeispiele:Embodiments:

Figur 1 zeigt eine bevorzugte Ausgestaltung des Verfahrens zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung. Bei dem in Figur 1 mit einem Ablaufdiagramm schematisch dargestellten Verfahren wird eine bedarfsgerechte, differenzdruckabhängige Filterabreinigung, bei der auch die Filteralterung bzw. der Filterverschleiß berücksichtig wird, dadurch erreicht, dass ein Referenzwert, der vorzugsweise einen Zustand des Filters der Staubsaugvorrichtung beschreibt, im Laufe der Zeit an eine etwaige Filteralterung oder einen etwaigen Filterverschleiß angepasst werden kann. Der Referenzwert, der im Sinne der Erfindung bevorzugt auch als erster Referenzwert bezeichnet wird, wird vorzugsweise als Steuerparameter für das vorgeschlagene Steuerungsverfahren verwendet. Er kann Aufschluss geben über einen Filterzustand der Staubsaugvorrichtung, so dass der Referenzwert vorzugsweise angibt, welche Filterabreinigungsgüte mit der Filterabreinigung angestrebt werden soll. Dadurch kann im Laufe der Betriebszeit einer Staubsaugvorrichtung der Tatsache Rechnung getragen werden, dass sich die Filter der Staubsaugvorrichtung durch den Betrieb zusetzen können, so dass die Staubsaugvorrichtung bei nachfolgenden Abreinigungsprozessen nicht mehr die ursprüngliche Filterabreinigungsgüte zu erreichen versucht, sondern eine an den aktuellen Filterzustand angepasste Filterabreinigungsgüte. Figure 1 shows a preferred embodiment of the method for controlling a cleaning process in a vacuum cleaner. The in Figure 1 The method, which is shown schematically in a flowchart, is a needs-based, differential pressure-dependent filter cleaning process, in which filter aging or filter wear is also taken into account, in that a reference value, which preferably describes a condition of the filter of the vacuum cleaning device, corresponds to any filter aging over time or any filter wear can be adjusted. The reference value, which in the context of the invention is preferably also referred to as the first reference value, is preferably used as a control parameter for the proposed control method. It can provide information about a filter status of the vacuum cleaning device, so that the reference value preferably indicates which filter cleaning quality is to be aimed for with the filter cleaning. As a result, in the course of the operating time of a vacuum cleaner device, account can be taken of the fact that the filters of the vacuum cleaner device can become clogged during operation, so that the vacuum cleaner device no longer tries to achieve the original filter cleaning quality during subsequent cleaning processes, but rather a filter cleaning quality adapted to the current filter condition .

Dies wird vorzugsweise dadurch erreicht, dass der Referenzwert an einen aktuellen Filterzustand angepasst werden kann, wobei der aktuelle Filterzustand vorteilhafterweise durch einen Differenzdruckwert beschrieben wird, der im Absaugstrom vor und hinter dem Filter ermittelt wird.This is preferably achieved in that the reference value can be adapted to a current filter state, the current filter state advantageously being described by a differential pressure value that is determined in the suction flow in front of and behind the filter.

Claims (8)

Verfahren zur Steuerung eines Abreinigungsprozesses in einer Staubsaugvorrichtung, wobei die Staubsaugvorrichtung mindestens einen Filter umfasst, der regelmäßig abgereinigt wird,
gekennzeichnet durch die folgenden Verfahrensschritte: a) Festlegung eines ersten Referenzwertes, der einen Druckbereich definiert, b) Ermittlung eines Differenzdruckwertes, der einen aktuellen Zustand des Filters beschreibt, c) Bestimmung, ob der Differenzdruckwert in dem unter a) definierten Druckbereich liegt, d) Festlegung eines zweiten Referenzwertes, indem entweder der erste Referenzwert beibehalten wird oder der erste Referenzwert durch den unter b) ermittelten Differenzdruckwertes ersetzt wird, wobei die Festlegung des zweiten Referenzwerts in Abhängigkeit davon erfolgt, ob der unter b) ermittelte Differenzdruckwert in dem unter a) definierten Druckbereich liegt. Method for controlling a cleaning process in a vacuum cleaner, wherein the vacuum cleaner comprises at least one filter that is cleaned regularly,
characterized by the following process steps: a) definition of a first reference value which defines a pressure range, b) Determination of a differential pressure value that describes the current state of the filter, c) Determination of whether the differential pressure value is in the pressure range defined under a), d) Establishing a second reference value, either by maintaining the first reference value or by replacing the first reference value with the differential pressure value determined under b), the second reference value being determined depending on whether the differential pressure value determined under b) is within the range under a ) defined pressure range. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
der zweite Referenzwert größer ist als der erste Referenzwert.Method according to claim 1,
characterized in that
the second reference value is greater than the first reference value. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
der zweite Referenzwert kleiner ist als der erste Referenzwert.Method according to claim 1,
characterized in that
the second reference value is smaller than the first reference value. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche
dadurch gekennzeichnet, dass
der erste Referenzwert einen Zustand des Filters der Staubsaugvorrichtung oder eine Abreinigungsqualität beschreibt.Method according to one or more of the preceding claims
characterized in that
the first reference value describes a condition of the filter of the vacuum cleaner or a cleaning quality. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche
dadurch gekennzeichnet, dass
der Differenzdruckwert durch Differenzbildung von Druckwerten ermittelt wird, die in einem Absaugstrom der Staubsaugvorrichtung vor und hinter dem Filter erfassbar sind.Method according to one or more of the preceding claims
characterized in that
the differential pressure value is determined by forming the difference between pressure values which can be detected in a suction flow of the vacuum cleaner in front of and behind the filter. Staubsaugvorrichtung
dadurch gekennzeichnet, dass
eine Filterabreinigung der Staubsaugvorrichtung mit dem Verfahren nach einem oder mehreren der vorhergehenden Ansprüche steuerbar ist.Vacuum cleaner
characterized in that
a filter cleaning of the vacuum cleaning device can be controlled with the method according to one or more of the preceding claims. Staubsaugvorrichtung nach Anspruch 6
dadurch gekennzeichnet, dass
die Staubsaugvorrichtung Sensoren zur Ermittlung von Druckwerten umfasst, wobei die Sensoren in einem Absaugstrom der Staubsaugvorrichtung vor und hinter dem Filter angeordnet sind.Vacuum cleaning device according to claim 6
characterized in that
the vacuum cleaner comprises sensors for determining pressure values, the sensors being arranged in a suction stream of the vacuum cleaner in front of and behind the filter. Staubsaugvorrichtung nach Anspruch 6 oder 7
dadurch gekennzeichnet, dass
die Staubsaugvorrichtung eine Steuereinrichtung zur Veranlassung und Durchführung der Verfahrensschritte des Steuerverfahrens umfasst.Vacuum cleaning device according to claim 6 or 7
characterized in that
the vacuum cleaner comprises a control device for initiating and performing the method steps of the control method.
EP19170577.1A 2019-04-23 2019-04-23 Vacuum cleaner and method for controlling a cleaning process in a vacuum cleaner Active EP3730024B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19170577.1A EP3730024B1 (en) 2019-04-23 2019-04-23 Vacuum cleaner and method for controlling a cleaning process in a vacuum cleaner
DK19170577.1T DK3730024T3 (en) 2019-04-23 2019-04-23 Method for controlling a cleaning process in a vacuum cleaner and vacuum cleaner
CN202080020621.XA CN113556967B (en) 2019-04-23 2020-04-09 Method for controlling a cleaning process in a vacuum cleaning device, and vacuum cleaning device
PCT/EP2020/060122 WO2020216628A1 (en) 2019-04-23 2020-04-09 Method for controlling a cleaning process in a vacuum cleaner, and vacuum cleaner
US17/442,851 US20220183523A1 (en) 2019-04-23 2020-04-09 Method for controlling a clearing process in a vacuum cleaning device, and vacuum cleaning device
JP2021561894A JP7331133B2 (en) 2019-04-23 2020-04-09 Method for controlling the cleaning process in vacuum cleaning equipment and vacuum cleaning equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19170577.1A EP3730024B1 (en) 2019-04-23 2019-04-23 Vacuum cleaner and method for controlling a cleaning process in a vacuum cleaner

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EP3730024A1 true EP3730024A1 (en) 2020-10-28
EP3730024B1 EP3730024B1 (en) 2021-12-29

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EP (1) EP3730024B1 (en)
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WO (1) WO2020216628A1 (en)

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GB2622366A (en) * 2022-09-13 2024-03-20 Dyson Technology Ltd A method of determining a value of a filter loading of a filter of an air-moving device
CN115541443B (en) * 2022-11-30 2023-03-03 苏州浪潮智能科技有限公司 Detection method and detection device for printed circuit board and printing equipment for printed circuit board
GB2625103A (en) * 2022-12-06 2024-06-12 Dyson Technology Ltd A method for determining an initial filter-loading value of an air-moving device

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EP2644076A1 (en) * 2012-03-27 2013-10-02 ELECTROSTAR GmbH Sucker

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CN113556967B (en) 2022-11-29
DK3730024T3 (en) 2022-02-07
US20220183523A1 (en) 2022-06-16
JP2022529172A (en) 2022-06-17
WO2020216628A1 (en) 2020-10-29
JP7331133B2 (en) 2023-08-22
CN113556967A (en) 2021-10-26

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