EP2126187B1 - Method and device for drying laundry by means of an air current, and household appliance containing such a device - Google Patents
Method and device for drying laundry by means of an air current, and household appliance containing such a device Download PDFInfo
- Publication number
- EP2126187B1 EP2126187B1 EP07822723.8A EP07822723A EP2126187B1 EP 2126187 B1 EP2126187 B1 EP 2126187B1 EP 07822723 A EP07822723 A EP 07822723A EP 2126187 B1 EP2126187 B1 EP 2126187B1
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- EP
- European Patent Office
- Prior art keywords
- lint
- scraper
- sensor
- air flow
- wiper
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/22—Lint collecting arrangements
Definitions
- the present invention relates to a method and apparatus for drying laundry by means of an air flow, comprising a drum for receiving the laundry and a duct system for guiding the air flow, the duct system having a downstream side of the drum portion, in which the air flow in a descending direction is guided and in which a sieve arranged to catch fluff from the air flow and the sieve a movement exporting scrapers for stripping trapped lint and a collecting space are associated with an opening for receiving stripped lint.
- the invention further relates to a device containing a device of the type mentioned above household appliance.
- the abovementioned scraper pushes lint removed from the lint filter into the aforementioned collecting space.
- a monitoring of the movement of the scraper is not provided in the relevant known household laundry dryer meanwhile.
- a faulty operation of the scraper can not be readily recognized.
- a method for operating a household laundry dryer with a lint filter for a drying air flow and a device controlled by a monitoring and control device of the household laundry dryer for cleaning the lint filter is also known (US Pat. DE 199 24 297 A1 ).
- the cleaning device of the lint filter is controlled so that during the majority of the operating time the lint filter is covered with a lint, which itself has filtering action.
- the relevant additional lint felt improves the filter effect and is in particular able to retain even small ultrafines, so that the dry air duct and in particular a condenser in the dry air flow lave much less and need to be cleaned less frequently.
- the cleaning device only remove a part of the accumulated lint, so that constantly a lint layer of a certain thickness remains on the filter.
- the above-mentioned cleaning device is formed by a filter associated with the lint collector with a drive which is controlled by a monitoring and control device of the household laundry dryer.
- the lint collector moves parallel to the filter surface, collecting lint that has settled on the filter as it moves, and delivering it to a lint collector, from which it can be removed by an operator as needed.
- the pressure drop on the lint filter is additionally monitored. In this way, although a proper work of the lint filter can be largely recognized, but it can not be determined easily whether the mentioned lint collector his movement parallel to the filter surface also performs properly or is disturbed in its movement. However, such a finding is highly desirable for smooth cleaning of the lint filter.
- a lint filter device for an airflow in a household tumble dryer having an endless circulating element EP 1 050 619 B1 .
- the trajectory of this endless circulation element is crossed at a first location by the air flow.
- the circulating element in question has a filter element which is arranged in a process phase in which there is a need for filtering, at the location of the first intersection of the air flow with the movement path and which in a cleaning phase by means of a circulating air movement of the circulation element to a device for removing of lint from the surface of the filter element is tantlite.
- the circulating element in question also has a second section, which is located in the process phase at the location of a second intersection of the air flow with the trajectory of the circulating element in the direction of the air flow behind the location of the first intersection and which is formedfacemaschig.
- a second section which is located in the process phase at the location of a second intersection of the air flow with the trajectory of the circulating element in the direction of the air flow behind the location of the first intersection and which is formedassimaschig.
- a faulty operation of a scraper can have different causes.
- the scraper may be blocked in his leadership before the sieve or lint filter, on the sieve or behind the sieve. In the case of blocking the scraper in front of the sieve this is thus not cleaned; in case of blockage of the scraper on the screen, a defective screen may be present and lint may not be filtered.
- the reason for blocking the scraper may be a failure of the scraper drive. If such errors or images are not recognized, it can lead to follow-on errors that can put at least a proper operation of a washer or dryer in question.
- the invention is therefore based on the object to show a way, as in a method and apparatus of the type mentioned, the cleaning process of serving for catching lint from an air stream sieve to relatively simple and effectively monitor its proper operation and report an incident.
- the above object is achieved in a method of the type mentioned in the present invention, characterized in that in the course of said movement of the scraper, the achievement of at least a certain, fixed movement position is monitored.
- the invention has the advantage that it can be monitored in a relatively simple, yet effective manner, whether said scraper ever performs a movement with respect to said lint collecting screen and thus its lint scraping function.
- the movement of the stripper in question is monitored at least one specific fixed movement position. If the scraper concerned reaches this movement position or overflows it, this is considered to be a proper work of the relevant scraper. If, on the other hand, the at least one specific fixed movement position is not reached or overrun by the scraper in question, this is regarded as an error case which can be reported or displayed by issuing an alarm signal, for example after a certain period of time has elapsed since the time at which the alarm was triggered Move. On the mentioned message or display signal out then required measures can be initiated, such as the stoppage of further operation and / or the summons of service personnel.
- a sensor signal is emitted by the scraper on reaching the at least one specific fixed movement position.
- a proper housing of a lint collection container is monitored in said collection space. Namely, by this combined monitoring of reaching at least a certain fixed movement position by the said scraper and the proper placement of the lint collector in the collecting space a safe lint collecting can be ensured. Due to the additional monitoring of the proper placement of the lint collector in said collection space can be for on the other hand, an undesirable distribution of lint removed by the wiper due to the monitoring involved can be avoided. If said lint collecting container is not properly accommodated in the collecting space, this is determined by the mentioned monitoring, and a corresponding reporting signal can be given which can be used to stop the operation and / or call service personnel.
- the above-mentioned proper housing of the lint collector in the collecting space is expediently monitored by evaluating at least one sensor signal triggered by the relevant storage. This results in the advantage of a particularly simple possibility of monitoring the proper placement of the lint collector in said collection space.
- a report signal is issued.
- measures required in a simple manner by the relevant message signal can be initiated, such as the already mentioned stopping of further operation and / or the calling of service personnel.
- the object underlying the invention in a device of the type mentioned in the present invention is achieved in that a movement of the scraper with respect to at least one specific fixed movement position by means of a sensor arrangement can be monitored.
- a proper housing of a provided for collecting collected from the scraper lint fluff collection container in the said collection space can be monitored.
- This has the advantage that proper collection of the lint removed from the wire by means of the wiper can be monitored. Namely, such collecting is ensured only when the lint collecting container is properly accommodated in the collecting space.
- the proper placement of the lint collector in the said collection space can be monitored by means of a sensor arrangement. This makes it possible to monitor in a particularly simple manner the proper placement of the lint collector in said collection space.
- the respective sensor arrangement is formed by a tactile or non-contact sensor.
- a tactile or non-contact sensor This has the advantage that in each case a structurally simple, yet safe sensor arrangement can be used.
- the use of contactless sensors over tactile sensors also has the advantage that the so-called process air duct - through which the above-mentioned air flow possibly passes with lint - need not be partially opened. In this way, otherwise possibly occurring leakage losses of the air flow and malfunction due to exiting moist air (corrosion phenomena, circuit uncertainties) can be avoided in a simple manner. In part, such partial openings could indeed be sealed, however, the areas for such openings are difficult to make reliable and mean a significant, undesirable overhead.
- At least one light barrier, a Hall sensor, a light coupler, in particular an IR coupler or an inductive sensor can be advantageously provided as non-contact sensor.
- This has the advantage that it provides non-contact sensors which can be used in a device environment which is less well suited for tactile sensors.
- a Hall sensor for monitoring the at least one specific fixed movement position, in particular an end position of the scraper attached to this a magnetic field emitting magnetic part, which acts with its magnetic field on the Hall sensor, and the Hall sensor is arranged stationary relative to the relevant magnetic part in the region of said specific fixed movement position of the scraper.
- a Hall sensor for monitoring a certain fixed movement position, in particular the end position of the scraper additionally a proper recording of the lint collection container in the said collection chamber monitored.
- the lint collector in question also has a magnetic field emitting magnetic part, whose magnetic field acts on the Hall sensor.
- a device as previously specified is contained in a domestic appliance, particularly in a washer or dryer.
- a dryer is thus particularly safe to operate in terms of fluff removal in an advantageous manner.
- laundry 1 is dried by means of an air flow in a drum 2, which is provided for receiving the laundry 1.
- the drum 2 is rotatable about an axis 3 to shake the laundry 1 in the air flow.
- the channel system 4, 5, 6 comprises a falling section 4, which passes partly through a bearing plate 7 for loading the drum 2, a horizontal portion 5 below the drum 2 and a rising portion 6, through which the air flow back to the drum 2 .
- the falling section 4 contains a sieve 8, which is arranged in the bearing plate 7 and from which the lint 9, which entraises the air flow of the laundry 1, traps.
- Devices shown can collected lint 9 of the sieve 8 - which thus represents a lint filter - are stripped to ensure the lowest possible flow resistance of the screen 8.
- a heat exchanger 10 is provided, in which the air flow is cooled to condense entrained water vapor. Condensed water is known per se and in Fig. 1 Equipment not shown separated from the air stream and disposed of.
- a fan 11 which causes the air flow through the drum 2 and the channel system 4, 5, 6, and a heater 12, through which the air flow before entering the drum 2 again is heated.
- the heat exchanger 10 and the heating device 12 may optionally be wholly or partly associated with a recuperative heat transport system, in particular to a heat pump.
- the bearing plate 7 forms on the one hand a support structure for a front side of the device and a front support for the drum 2, and on the other hand it carries a door 13 for closing the drum second
- a device according to the first embodiment of the invention with a first sensor arrangement is in the washer / dryer according to Fig. 1 provided sieve 8 as shown in a tunnel-shaped hollow body 14 containing.
- the hollow body 14 extends in the direction of the width of the in Fig. 1 shown washer / dryer, and he has, for example, a round cross-section.
- the respective tunnel-shaped hollow body 14 carries the screen 8 preferably only in that area, which adjoins an entry area for the out of the drum 2 according to Fig. 1 exiting airflow connects. Relative to the illustration in Fig.
- the tunnel-shaped hollow body 14 has in its longitudinal direction on two opposite end portions 15, 16, between which a scraper 17 preferably only in the longitudinal direction of the respective hollow body 14 back and forth, as indicated by a in Fig. 2 indicated double arrow 18 is illustrated, and optionally additionally rotatable about its central axis during its longitudinal movement.
- the end region 15 is here preferably a closed end region, and the end region 16 is an open end region.
- the scraper 17 may, for example, be constructed such that it has scraper elements projecting from a support plate, for example plastic bristles, which in the illustration according to FIG Fig. 2 pointing to the left and with which the scraper 17 in its movement from the right side to the left side in Fig. 2 Fluff allowed to strip 9 of the sieve 8.
- This lint 9 moves the scraper 17 into a lint collector 19 attached to its open end region 16, which is received by a collecting space provided there (not shown) in such a way that it sealingly adjoins the open end region 16 of the tunnel-shaped hollow body 14 with its access opening ,
- the above-mentioned reciprocating movement of the scraper 17 in the tunnel-shaped hollow body 14 and thus along the screen 8 causes here, for example, an electric drive, the one in Fig. 2 only schematically indicated, by the monitoring and control device 22 in a separate operation out in operation settable electric motor 20 and a drive spindle 21 includes.
- This drive spindle 21 cooperates, for example, with a nut part, which is firmly connected to the wiper 17.
- the relevant electric motor 20 is controlled by a monitoring and control device 22, which is supplied to an input terminal 23, a corresponding control signal, for example by a at a certain potential U, such as + 5V or ground potential switch 24th
- the monitoring and control device 22 which may be, for example, a microcontroller with its own software, is according to Fig. 2 On the input side connected to the outputs of at least one with respect to the tunnel-shaped hollow body 14 stationarily arranged Hall sensor 25, with the reaching or overflow of a certain fixed movement position of the scraper 17 is monitored. This movement position of the scraper 17 is here its end position during its movement in the tunnel-shaped hollow body.
- the Hall sensor 25 in question may be a Hall IC, which in addition to a Hall element may also contain a processing circuit, such as a Schmitt trigger circuit, which is controlled by the respective Hall voltage of the Hall element and which at a given amplitude of this Hall voltage outputs a fixed output signal, for example a binary signal "1" corresponding output signal (eg + 5V).
- a processing circuit such as a Schmitt trigger circuit, which is controlled by the respective Hall voltage of the Hall element and which at a given amplitude of this Hall voltage outputs a fixed output signal, for example a binary signal "1" corresponding output signal (eg + 5V).
- a second Hall sensor 26 is shown in dashed lines in a likewise determined fixed movement position of the scraper 17. This movement position is the starting or starting position of the scraper 17 in the tunnel-shaped hollow body 14.
- the relevant second Hall sensor 26 is also connected to the monitoring and control device 22 on the output side.
- the Hall sensor 25 While the Hall sensor 25 is located at a certain first distance above the opening portion 16 of the tunnel-shaped hollow body 14, the aforementioned second Hall sensor 26 is arranged in a comparatively smaller second distance near the other, closed end portion 15 of the tunnel-shaped hollow body 14. This situation will be discussed in more detail below.
- a magnetic field is generated by a magnetic member 27 in the form of a permanent magnet, which is supported by the scraper 17.
- Another magnetic field is in the embodiment according to Fig. 2 caused by a magnetic member 28 in the form of a permanent magnet or a magnetic sheet, which is mounted in or on the lint collector 19. The conditions are according to Fig.
- the Hall sensor 25 then sends the mentioned specific evaluable Hall voltage to the monitoring and control device 22, when, on the one hand, the scraper 17 with its magnetic part 27 moves into a specific movement position - in the present case, this is its left Endposition - has been moved and when, on the other hand, the lint collector 19 has been properly inserted with its magnetic part 28 in the mentioned collection space, so that the relevant lint collector 19 sealingly abuts the end region 16 of the tunnel-shaped hollow body 14 with its receiving opening.
- the magnetic part 28 effectively causes a base magnetic signal in the Hall sensor, and the magnetic part 27 provides an additive magnetic signal.
- a combined monitoring namely on the one hand to reach a certain fixed movement position (this is the end position) of the scraper 17 and on the other the proper insertion of the lint collector 19 in the space provided for its collection space.
- the right end region 15 of the tunnel-shaped hollow body 14 is carried out by means of there also with respect to the tunnel-shaped hollow body 14 also fixedly arranged Hall sensor 26 only the determination of reaching this position by the scraper 17 with its magnetic part 27.
- the Hall sensor 26 is according to Fig. 2 closer to the tunnel-shaped hollow body 14 arranged as the Hall sensor 25, as there on the relevant Hall sensor 26 there only a single magnetic field - namely only that of the magnetic member 27 - acts to deliver a corresponding evaluable Hall voltage, as on the other hand is output from the Hall sensor 25, when according to this Fig. 2 the magnetic fields of the two magnetic parts 27, 28 act.
- this Hall sensor 26 may be located farther away from the tunnel-shaped hollow body 14 than in FIG Fig. 2 is shown, for example, at the same distance from the tunnel-shaped hollow body 14 as the Hall sensor 25th
- Hall sensor 25 To the location of in Fig. 2 illustrated Hall sensor 25 may be added the following.
- the Hall-effect sensor 25 or the Hall IC containing it, as explained above, with respect to the tunnel-shaped hollow body 14 and the lint collector 19 may be arranged so that it provides the mentioned specific evaluable Hall voltage only if the Scraper 17 in his in Fig. 2 left end position is placed in the tunnel-shaped hollow body 14 and if at the same time the lint collector 19 is properly inserted into the collection space.
- the Hall sensor 25 or the Hall IC containing the same with respect to the tunnel-shaped hollow body 14 and the lint collector 19, that the particular Hall voltage or a first edge of an evaluation voltage from the respective Hall sensor 25 is discharged when inserted into said collection space lint collector 19 and approaching the scraper 17 with its magnetic part 27 to the end portion 16 and that the particular Hall voltage again or a second edge of the relevant evaluation voltage continues to be delivered when the scraper 17 is moved with its magnetic part 27 further to the end portion 16, for example, in its actual end position.
- the distance between the determination of the two specific evaluable Hall or evaluation voltages can be between 3 and 6 mm, for example.
- the distance in question depends, it should be noted here, on the remanence of the magnetic parts or permanent magnets 27, 28 used, on the focusing of the magnetic field lines of these magnetic parts or permanent magnets 27, 28 and on the magnetic sensitivity of the Hall sensor or Hall IC 25 off.
- the at least one specific fixed movement position is not reached by the scraper 17 in the course of its movement, this is evaluated as an accident, for example after a certain period of time has elapsed since the relevant movement was initiated, and for example by a message issued by the monitoring and control device 22 - and / or display signal signals.
- FIG. 3 is in a schematic representation as in Fig. 2 and partially in section an apparatus according to the second embodiment of the invention with a second sensor arrangement illustrated.
- the relevant second sensor arrangement differs from that in FIG Fig. 2 provided first sensor arrangement in that instead of the Hall sensor 25 here only two schematically indicated reed contacts 29, 30 are provided which are connected to the monitoring and control device 22 and with the in connection with the description of in Fig. 2 shown device cooperate magnetic parts or permanent magnets 26 and 27, respectively.
- yet another reed contact 31 near the end portion 15 of in Fig. 3 arranged hollow body 14 is arranged.
- This instead of the Hall sensor 26 in the device according to Fig. 2 Reed contact 31 provided here is likewise connected to the monitoring and control device 22 and can be actuated by means of the magnetic part or permanent magnet 27 carried by the scraper 17 when the scraper 17 is in its position in FIG Fig. 3 is shown on the right.
- the movement positions of the scraper 17 moved by the motor 20 by means of the drive spindle 21 and the proper placement of the lint collector 19 in its collecting space are monitored independently of each other in the monitoring and control device 22.
- the reed contacts corresponding to the reed contacts 30, 31 could additionally be arranged along the movement path of the scraper 17 in a definable number and be connected to the monitoring and control device 22. As a result, the course of movement of the scraper 17 between the two end regions 15 and 16 of the tunnel-shaped hollow body 14 could then additionally be monitored.
- the in Fig. 3 illustrated device of in Fig. 2 shown device.
- Fig. 4 shows in a schematic representation as in Fig. 1 and 2 and partly in section a device according to a third embodiment of the present invention with a third sensor arrangement.
- the movement of the scraper 17 in at least one specific fixed movement position - which is also in In the present case may be the final position of the scraper 17 - monitored.
- the scraper 17 contains as Abstreifimplantation 32 such with a piezoelectric property.
- Abstreifimplantation 32 such with a piezoelectric property.
- the respective stripping elements 32 deliver a specific piezoelectric voltage at their deflection from the electrical connections provided on them.
- all stripping elements 32 are formed by a contiguous piezo film. Reaches the thus formed scraper 17 by the running of the motor 20 his in Fig.
- the monitoring and control device 22 may, although in Fig. 4 is not shown in detail, be connected to at least one other sensor, which determines the proper positioning of the collecting container 19 in its collecting space, as for example in Fig. 3 is shown. Furthermore, the relevant monitoring and control device 22 may be connected to at least one further sensor, which is arranged along the movement path of the scraper 17. For this purpose, for example, an actuatable by the wiper 17 mechanical switch, such as a micro switch in question. In addition, the relevant monitoring and control device 22 is also in the device according to Fig. 4 as in the devices according to Fig. 2 and 3 connected to the drive device 20 for driving the scraper 17. Thus, the in Fig. 4 shown device to work in principle the same way as in Fig. 2 shown device.
- FIG. 5 shows a schematic representation of a further, fourth embodiment of the device according to the present invention with a fourth sensor arrangement.
- the fourth sensor arrangement in question with which the movement of the scraper 17 in its movement end position in the end region 16 of the tunnel-shaped hollow body 14 is determined here, is according to FIG Fig. 5 formed by that at least one scraper element 33 of the scraper 17 has an electrically conductive surface or even entirely of an electrically conductive material, preferably of an electrically conductive metal leaf spring and that relative to the respective stripping element 33, a contact arrangement with two electrically conductive contacts 34, 35 in the end portion 16 is provided.
- the two contacts 34, 35 of this contact arrangement can be arranged, for example, at a distance of 0.5 to 1.5 mm apart.
- This contact arrangement 34, 35 is hereby touched by, for example, two electrically conductive and interconnected scraper elements 33 corresponding to the closing of a switch when the scraper 17 is in its in Fig. 5 Moving end position shown is located.
- the respective stripping elements 33 which consist for example of a material, as it is used for flexible interconnects, carry a thin strip-like metallization.
- the mentioned electrically conductive contacts 33, 34 are connected to the on hand of Fig. 2 explained monitoring and control device 22 connected by the monitoring of the reaching of said movement end position by the scraper 17 is enabled.
- a single microswitch 36 is provided, which is also connected with its terminals with the mentioned monitoring and control device 22.
- sensors can be arranged along the path of movement of the scraper 17 and be actuated by it in the course of its movement. All such sensors are also connected to the monitoring and control device 22.
- Fig. 6 shows a schematic representation of a further, fifth embodiment of the device according to the present invention with a fifth sensor arrangement.
- the monitoring of at least one specific fixed movement position of the scraper 17, here in its lying at the end portion 16 end position by means of a microswitch 37.
- the actuator of the microswitch 37 in question is actuated by a scraper 17 connected to the web part 38, with which the micro switch 37 can be closed.
- the relevant microswitch 37 is with its connections with the already in Fig. 2 monitoring and control device 22 is connected, which monitors the monitoring of at least one fixed movement position of the scraper 17.
- the microswitch 37 corresponding microswitches, moreover, along the movement path of the scraper 17 according to Fig. 6 be provided, but at least at one point in the end region 15 of the tunnel-shaped hollow body 14. As a result, the course of movement of the scraper 17 can also be monitored here.
- the device works accordingly Fig. 6 in the same way as the device according to Fig. 2 ,
- Fig. 7 illustrates in a simplified schematic representation of a sixth sensor arrangement, by means of which the movement of the scraper 17 with respect to at least one specific fixed movement position with a sixth sensor arrangement can be monitored.
- a light barrier with a light source 39 which may be in particular an infrared (IR) light source
- a light receiver 40 which is in particular an infrared (IR) transistor can act.
- a conveyor belt 41 which moves the stripper 17 mentioned above.
- This conveyor belt 41 for example made of a flexible material, such as plastic or steel, in particular spring steel, which by means of the embodiments according to FIGS Fig. 2 to 6 shown drive means by means of the motor 20 up and unwound and thus the in Fig. 7 indicated scraper 17 allows to move along its trajectory, preferably in the longitudinal direction of the conveyor belt 41 equidistantly arranged passage openings 42 through which the light emitted from the light source 39 can reach the light receiver 40 out.
- a counter 43 Be connected on the input side, which can be counted by the phototransistor 40 detected light signals or pulses for monitoring and evaluation.
- this counter 43 may be included in the monitoring and control device 22 as shown in FIGS Fig. 2 to 6 is shown and with the here ultimately monitored whether the conveyor belt 41 has moved the scraper 17 in at least one specific, fixed movement position or has moved.
- the respectively achieved counter position of the counter 43 can be monitored and evaluated.
- the relevant counter position of the counter 43 can be achieved in that the light barrier consisting of the mentioned light source 39 and the light receiver 40 is arranged at a position remote from the movement end position of the scraper 17 position, in particular at the movement starting position of the respective scraper 17 and then the number of detected by the passage openings 42 in the conveyor belt 41 by the light receiver 40 light signals corresponding to the distance between the respective light barrier and the movement end position of the scraper 17 are counted and compared with a predetermined reference count.
- This reference count indicates the number of count signals to be counted by the transport belt 41 by passing between the mentioned light barrier passage openings 42 in the conveyor belt 41 during proper transport of the scraper 17.
- the conveyor belt 41 can optionally also be provided with only a single passage opening 42, which is contained in the conveyor belt 41 at a very specific distance from the scraper 17.
- the aforementioned light barrier consisting of the light source 39 and the light receiver 40 along the movement path of the scraper 17 may be arranged at a position which is the same distance as the just mentioned distance from the movement end position of the scraper 17 away. The determination or the non-detection of the respective one passage opening 42 in the conveyor belt 41 by means of the mentioned light barrier can then be considered to the effect that the scraper 17 has been properly or not properly transported by the conveyor belt 41.
- corresponding display or message signals can be emitted.
- Fig. 8 shows in a simplified schematic representation of a seventh sensor arrangement according to a modification of in Fig. 7 illustrated device.
- this seventh sensor arrangement which is also in each of the devices according to Fig. 2 to 6 can be used, has the conveyor belt 41, which is connected to the scraper 17 and which can be wound or unwound from a corresponding drive device, as in conjunction with Fig. 7 has been mentioned, unlike the Fig. 7 arranged in its longitudinal direction light reflection areas 44, which are preferably arranged equidistantly. Each such reflection region 44 thus allows light emitted by the light-emitting element 39 to reach the light receiver 40 and trigger a corresponding output signal there.
- the present invention is not limited to devices with the sensor arrangements considered and explained above. Rather, instead of the specified sensor arrangements, other sensor arrangements not considered here can also be used, such as acoustic or capacitive sensor arrangements. Otherwise, in the above-described embodiments provided sensor arrangements other than in the previously described figures shown in various combinations.
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Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Trocknen von Wäsche mittels eines Luftstroms, umfassend eine Trommel zur Aufnahme der Wäsche und ein Kanalsystem zur Führung des Luftstroms, wobei das Kanalsystem einen abströmseitig der Trommel angeordneten Abschnitt aufweist, in welchem der Luftstrom in einer fallenden Richtung geführt ist und in welchem ein Sieb zum Auffangen von Flusen aus dem Luftstrom angeordnet und dem Sieb ein eine Bewegung ausführender Abstreifer zum Abstreifen aufgefangener Flusen sowie ein Sammelraum mit einer Öffnung zum Aufnehmen abgestreifter Flusen zugeordnet sind. Die Erfindung bezieht sich ferner auf ein eine Vorrichtung der vorstehend genannten Art enthaltendes Hausgerät.The present invention relates to a method and apparatus for drying laundry by means of an air flow, comprising a drum for receiving the laundry and a duct system for guiding the air flow, the duct system having a downstream side of the drum portion, in which the air flow in a descending direction is guided and in which a sieve arranged to catch fluff from the air flow and the sieve a movement exporting scrapers for stripping trapped lint and a collecting space are associated with an opening for receiving stripped lint. The invention further relates to a device containing a device of the type mentioned above household appliance.
Es ist bereits ein Haushaltwäschetrockner mit einer beweglichen Vorrichtung, die am Ende eines Trocknungsprozesses von einer Bedienperson zwangsläufig betätigt wird, und mit einem in einem Abluftkanal angeordneten Flusensieb bekannt (
Es ist ferner ein Verfahren zum Betreiben eines Haushaltwäschetrockners mit einem Flusenfilter für einen Trockenluftstrom und einer von einer Überwachungs- und Steuereinrichtung des Haushaltwäschetrockners gesteuerten Einrichtung zum Reinigen des Flusenfilters bekannt (
Die vorstehend erwähnte Reinigungseinrichtung ist durch einen der Filterfläche zugeordneten Flusensammler mit einem Antrieb gebildet, der von einer Überwachungs- und Steuereinrichtung des Haushaltwäschetrockners gesteuert wird. Der Flusensammler bewegt sich parallel zur Filterfläche, sammelt bei seiner Bewegung Flusen, die sich auf dem Filter abgesetzt haben, und fördert sie in einen Flusensammelbehälter, aus dem sie bei Bedarf von einer Bedienperson entfernt werden können. Um die Wirksamkeit des Flusenfilters zu ermitteln, wird zusätzlich der Druckabfall am Flusenfilter überwacht. Auf diese Weise kann zwar ein ordnungsgemäßes Arbeiten des Flusenfilters weitgehend erkannt werden, allerdings kann nicht ohne weiteres festgestellt werden, ob der erwähnte Flusensammler seine Bewegung parallel zur Filterfläche auch ordnungsgemäß ausführt oder in seiner Bewegung gestört ist. Eine solche Feststellung ist aber für eine reibungslose Reinigung des Flusenfilters höchst wünschenswert.The above-mentioned cleaning device is formed by a filter associated with the lint collector with a drive which is controlled by a monitoring and control device of the household laundry dryer. The lint collector moves parallel to the filter surface, collecting lint that has settled on the filter as it moves, and delivering it to a lint collector, from which it can be removed by an operator as needed. In order to determine the effectiveness of the lint filter, the pressure drop on the lint filter is additionally monitored. In this way, although a proper work of the lint filter can be largely recognized, but it can not be determined easily whether the mentioned lint collector his movement parallel to the filter surface also performs properly or is disturbed in its movement. However, such a finding is highly desirable for smooth cleaning of the lint filter.
Es ist außerdem eine Flusenfiltereinrichtung für einen Luftstrom in einem Haushaltwäschetrockner mit einem endlosen Umlaufelement bekannt (
Es ist schließlich auch schon eine Vorrichtung zum Trocknen von Wäsche mittels eines Luftstroms vorgeschlagen worden (
Ein gestörter Betrieb eines Abstreifers kann dabei verschiedene Ursachen haben. So kann der Abstreifer in seiner Führung vor dem Sieb bzw. Flusensieb, am Sieb oder hinter dem Sieb blockiert sein. Im Falle der Blockierung des Abstreifers vor dem Sieb wird dieses somit nicht gereinigt; im Falle einer Blockierung des Abstreifers am Sieb kann ein defektes Sieb vorhanden sein und Flusen können gegebenenfalls nicht gefiltert werden. Im Falle einer Blockierung des Abstreifers nach dem Sieb aber vor dem Sammelraum werden die Flusen nicht in den betreffenden Sammelraum abgeführt, und die Führung des Abstreifers kann verstopfen. Überdies kann der Grund für eine Blockierung des Abstreifers in einem Defekt des Abstreiferantriebs liegen. Werden solche Fehlerfälle bzw. -bilder nicht erkannt, so kann es zu Folgefehlern kommen, die zumindest einen ordnungsgemäßen Betrieb eines Wasch- bzw. Wäschetrockners in Frage stellen können.A faulty operation of a scraper can have different causes. Thus, the scraper may be blocked in his leadership before the sieve or lint filter, on the sieve or behind the sieve. In the case of blocking the scraper in front of the sieve this is thus not cleaned; in case of blockage of the scraper on the screen, a defective screen may be present and lint may not be filtered. In the case of a blockage of the scraper after the sieve but before the plenum lint are not discharged into the respective collection space, and the guide of the scraper can clog. Moreover, the reason for blocking the scraper may be a failure of the scraper drive. If such errors or images are not recognized, it can lead to follow-on errors that can put at least a proper operation of a washer or dryer in question.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Weg aufzuzeigen, wie bei einem Verfahren und einer Vorrichtung der eingangs genannten Art der Reinigungsprozess des zum Auffangen von Flusen aus einem Luftstrom dienenden Siebes auf relativ einfache und wirksame Weise auf seinen ordnungsgemäßen Ablauf überwacht und ein Störungsfall gemeldet werden kann.The invention is therefore based on the object to show a way, as in a method and apparatus of the type mentioned, the cleaning process of serving for catching lint from an air stream sieve to relatively simple and effectively monitor its proper operation and report an incident.
Gelöst wird die vorstehend aufgezeigte Aufgabe bei einem Verfahren der eingangs genannten Art erfindungsgemäß dadurch, dass im Zuge der genannten Bewegung des Abstreifers das Erreichen zumindest einer bestimmten, festgelegten Bewegungsposition überwacht wird.The above object is achieved in a method of the type mentioned in the present invention, characterized in that in the course of said movement of the scraper, the achievement of at least a certain, fixed movement position is monitored.
Die Erfindung bringt den Vorteil mit sich, dass auf relativ einfache, aber dennoch wirksame Weise überwacht werden kann, ob der genannte Abstreifer überhaupt eine Bewegung in Bezug auf das genannte Flusen sammelnde Sieb und damit seine Flusenabstreiffunktion ausführt. Dazu wird die Bewegung des betreffenden Abstreifers an zumindest einer bestimmten festgelegten Bewegungsposition überwacht. Erreicht der betreffende Abstreifer diese Bewegungsposition bzw. überläuft er diese, so wird dies als ordnungsgemäßes Arbeiten des betreffenden Abstreifers gewertet. Wird hingegen die zumindest eine bestimmte festgelegte Bewegungsposition durch den betreffenden Abstreifer nicht erreicht bzw. überlaufen, so wird dies als Fehlerfall angesehen, der durch Abgabe eines Meldesignals gemeldet bzw. angezeigt werden kann, beispielsweise nach Ablauf einer bestimmten Zeitspanne seit dem Zeitpunkt der Veranlassung der betreffenden Bewegung. Auf das erwähnte Melde- bzw. Anzeigesignal hin können sodann erforderliche Maßnahmen veranlasst werden, wie beispielsweise die Stillsetzung des weiteren Betriebs und/oder die Herbeirufung von Servicepersonal.The invention has the advantage that it can be monitored in a relatively simple, yet effective manner, whether said scraper ever performs a movement with respect to said lint collecting screen and thus its lint scraping function. For this purpose, the movement of the stripper in question is monitored at least one specific fixed movement position. If the scraper concerned reaches this movement position or overflows it, this is considered to be a proper work of the relevant scraper. If, on the other hand, the at least one specific fixed movement position is not reached or overrun by the scraper in question, this is regarded as an error case which can be reported or displayed by issuing an alarm signal, for example after a certain period of time has elapsed since the time at which the alarm was triggered Move. On the mentioned message or display signal out then required measures can be initiated, such as the stoppage of further operation and / or the summons of service personnel.
Vorzugsweise wird ein Sensorsignal beim Erreichen der zumindest einen bestimmten festgelegten Bewegungsposition durch den Abstreifer abgegeben. Dies bringt den Vorteil einer besonders einfachen Möglichkeit mit sich, das Erreichen der zumindest einen bestimmten festgelegten Bewegungsposition des Abstreifers leicht überwachen zu können.Preferably, a sensor signal is emitted by the scraper on reaching the at least one specific fixed movement position. This brings with it the advantage of a particularly simple possibility of being able to easily monitor the achievement of the at least one specific, fixed movement position of the scraper.
In vorteilhafter Weise wird zusätzlich eine ordnungsgemäße Unterbringung eines Flusensammelbehälters in dem genannten Sammelraum überwacht. Durch diese kombinierte Überwachung des Erreichens zumindest einer bestimmten festgelegten Bewegungsposition durch den genannten Abstreifer und der ordnungsgemäßen Unterbringung des Flusensammelbehälters in dem Sammelraum kann nämlich ein sicheres Flusensammeln gewährleistet werden. Durch die zusätzliche Überwachung der ordnungsgemäßen Unterbringung des Flusensammelbehälters in dem genannten Sammelraum lässt sich zum einen eine ordnungsgemäße Flusensammlung gewährleisten, und zum anderen lässt sich eine unerwünschte Verteilung von durch den Abstreifer abgeführten Flusen aufgrund der betreffenden Überwachung vermeiden. Ist der genannte Flusensammelbehälter in dem Sammelraum nicht ordnungsgemäß untergebracht, so wird dies durch die erwähnte Überwachung festgestellt, und es kann ein entsprechendes Meldesignal abgegeben werden, welches zur Betriebsstillsetzung und/oder zum Herbeirufen von Servicepersonal genutzt werden kann.Advantageously, in addition, a proper housing of a lint collection container is monitored in said collection space. Namely, by this combined monitoring of reaching at least a certain fixed movement position by the said scraper and the proper placement of the lint collector in the collecting space a safe lint collecting can be ensured. Due to the additional monitoring of the proper placement of the lint collector in said collection space can be for on the other hand, an undesirable distribution of lint removed by the wiper due to the monitoring involved can be avoided. If said lint collecting container is not properly accommodated in the collecting space, this is determined by the mentioned monitoring, and a corresponding reporting signal can be given which can be used to stop the operation and / or call service personnel.
Zweckmäßigerweise wird die vorstehend erwähnte ordnungsgemäße Unterbringung des Flusensammelbehälters in dem Sammelraum durch Auswerten zumindest eines durch die betreffende Unterbringung ausgelösten Sensorsignals überwacht. Hierdurch ergibt sich der Vorteil einer besonders einfachen Möglichkeit des Überwachens der ordnungsgemäßen Unterbringung des Flusensammelbehälters in dem genannten Sammelraum.The above-mentioned proper housing of the lint collector in the collecting space is expediently monitored by evaluating at least one sensor signal triggered by the relevant storage. This results in the advantage of a particularly simple possibility of monitoring the proper placement of the lint collector in said collection space.
Vorzugsweise wird bei Feststellen eines nicht ordnungsgemäßen Betriebes des Abstreifers im Zuge der genannten Überwachung ein Meldesignal abgegeben. Hierdurch ergibt sich der Vorteil, dass auf einfache Weise durch das betreffende Meldesignal erforderliche Maßnahmen veranlasst werden können, wie die bereits erwähnte Stillsetzung des weiteren Betriebs und/oder die Herbeirufung von Servicepersonal.Preferably, upon detection of improper operation of the wiper in the course of said monitoring, a report signal is issued. This has the advantage that measures required in a simple manner by the relevant message signal can be initiated, such as the already mentioned stopping of further operation and / or the calling of service personnel.
Zum anderen wird die der Erfindung zugrundeliegende Aufgabe bei einer Vorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass eine Bewegung des Abstreifers hinsichtlich zumindest einer bestimmten festgelegten Bewegungsposition mittels einer Sensoranordnung überwachbar ist.On the other hand, the object underlying the invention in a device of the type mentioned in the present invention is achieved in that a movement of the scraper with respect to at least one specific fixed movement position by means of a sensor arrangement can be monitored.
Hierdurch ergibt sich der Vorteil eines besonders geringen konstruktiven Aufwands, um eine Bewegung des Abstreifers hinsichtlich zumindest einer bestimmten festgelegten Bewegungsposition ermitteln und damit überwachen zu können.This results in the advantage of a particularly low design effort to determine a movement of the scraper with respect to at least one particular fixed movement position and thus to monitor.
Vorzugsweise ist eine ordnungsgemäße Unterbringung eines für das Sammeln von von dem Abstreifer abgestreiften Flusen vorgesehenen Flusensammelbehälters in dem genannten Sammelraum überwachbar. Dies bringt den Vorteil mit sich, dass ein ordnungsgemäßes Sammeln der mittels des Abstreifers von dem Sieb abgestreiften Flusen überwacht werden kann. Ein solches Sammeln ist nämlich nur dann gewährleistet, wenn der Flusensammelbehälter in dem Sammelraum richtig untergebracht ist.Preferably, a proper housing of a provided for collecting collected from the scraper lint fluff collection container in the said collection space can be monitored. This has the advantage that proper collection of the lint removed from the wire by means of the wiper can be monitored. Namely, such collecting is ensured only when the lint collecting container is properly accommodated in the collecting space.
In vorteilhafter Weise ist die ordnungsgemäße Unterbringung des Flusensammelbehälters in dem genannten Sammelraum mittels einer Sensoranordnung überwachbar. Dadurch lässt sich auf besonders einfache Weise die ordnungsgemäße Unterbringung des Flusensammelbehälters in dem genannten Sammelraum überwachen.Advantageously, the proper placement of the lint collector in the said collection space can be monitored by means of a sensor arrangement. This makes it possible to monitor in a particularly simple manner the proper placement of the lint collector in said collection space.
In besonders vorteilhafter Weise sind diese gerade genannte Sensoranordnung und die oben erwähnte Sensoranordnung, mit der eine Bewegung des Abstreifers hinsichtlich zumindest einer bestimmten festgelegten Bewegungsposition überwachbar ist, miteinander kombiniert oder durch ein und dieselbe Sensoranordnung gebildet. Dies bringt den Vorteil mit sich, dass für die beiden Überwachungen mit einem besonders geringen konstruktiven Aufwand ausgekommen werden kann.In a particularly advantageous manner, these just mentioned sensor arrangement and the above-mentioned sensor arrangement, with which a movement of the scraper with respect to at least one specific fixed movement position can be monitored, combined or formed by one and the same sensor arrangement. This has the advantage that can be done with a particularly low design effort for the two monitors.
Zweckmäßigerweise ist die jeweilige Sensoranordnung durch einen taktilen oder berührungslosen Sensor gebildet. Dies bringt den Vorteil mit sich, dass jeweils eine konstruktiv einfache, aber dennoch sichere Sensoranordnung eingesetzt werden kann. Der Einsatz von berührungslosen Sensoren gegenüber taktilen Sensoren bringt überdies den Vorteil mit sich, dass der so genannte Prozessluftkanal - durch den der oben erwähnte Luftstrom gegebenenfalls mit Flusen durchtritt - nicht partiell geöffnet zu werden braucht. Auf diese Weise lassen sich auf einfache Weise sonst möglicherweise auftretende Leckverluste des Luftstromes sowie Funktionsstörungen infolge austretender feuchter Luft (Korrosionserscheinungen, Schaltungsunsicherheiten) vermeiden. Zum Teil ließen sich derartige partielle Öffnungen zwar abdichten, allerdings sind die Bereiche für solche Öffnungen nur schwer prozesssicher zu gestalten und bedeuten einen nicht unerheblichen, unerwünschten Zusatzaufwand.Conveniently, the respective sensor arrangement is formed by a tactile or non-contact sensor. This has the advantage that in each case a structurally simple, yet safe sensor arrangement can be used. The use of contactless sensors over tactile sensors also has the advantage that the so-called process air duct - through which the above-mentioned air flow possibly passes with lint - need not be partially opened. In this way, otherwise possibly occurring leakage losses of the air flow and malfunction due to exiting moist air (corrosion phenomena, circuit uncertainties) can be avoided in a simple manner. In part, such partial openings could indeed be sealed, however, the areas for such openings are difficult to make reliable and mean a significant, undesirable overhead.
Von Vorteil ist es ferner, als taktilen Sensor einen Schalter bzw. Endlagenschalter oder ein Piezoelement vorzusehen. Auf diese Weise können besonders einfache und relativ kleine Sensoren eingesetzt werden.It is also advantageous to provide a switch or limit switch or a piezo element as a tactile sensor. In this way, particularly simple and relatively small sensors can be used.
Andererseits kann in vorteilhafter Weise als berührungsloser Sensor wenigstens eine Lichtschranke, ein Hall-Sensor, ein Lichtkoppler, insbesondere ein IR-Koppler oder ein Induktivgeber vorgesehen sein. Hierdurch ergibt sich der Vorteil, dass damit berührungslose Sensoren zur Verfügung stehen, die in einer Vorrichtungsumgebung einsetzbar sind, welche für taktile Sensoren weniger gut geeignet ist.On the other hand, at least one light barrier, a Hall sensor, a light coupler, in particular an IR coupler or an inductive sensor can be advantageously provided as non-contact sensor. This has the advantage that it provides non-contact sensors which can be used in a device environment which is less well suited for tactile sensors.
Gemäß einer weiteren zweckmäßigen Ausgestaltung der Erfindung ist bei Einsatz eines Hall-Sensors zur Überwachung der zumindest einen bestimmten festgelegten Bewegungsposition, insbesondere einer Endposition des Abstreifers an diesem ein ein Magnetfeld abgebendes magnetisches Teil angebracht, welches mit seinem Magnetfeld auf den Hall-Sensor einwirkt, und der Hall-Sensor ist gegenüber dem betreffenden magnetischen Teil im Bereich der genannten bestimmten festgelegten Bewegungsposition des Abstreifers ortsfest angeordnet. Durch diese Maßnahmen ergibt sich der Vorteil einer besonders einfachen und wirksamen Überwachung des Erreichens oder Überlaufens der zumindest einer bestimmten festgelegten Bewegungsposition des Abstreifers durch den Abstreifer mittels eines einzigen Hall-Sensors.According to a further expedient embodiment of the invention, when using a Hall sensor for monitoring the at least one specific fixed movement position, in particular an end position of the scraper attached to this a magnetic field emitting magnetic part, which acts with its magnetic field on the Hall sensor, and the Hall sensor is arranged stationary relative to the relevant magnetic part in the region of said specific fixed movement position of the scraper. By these measures, there is the advantage of a particularly simple and effective monitoring of the reaching or overflow of at least one specific fixed movement position of the scraper by the scraper by means of a single Hall sensor.
Vorzugsweise ist mit dem zuvor genannten einen Hall-Sensor zur Überwachung einer bestimmten festgelegten Bewegungsposition, insbesondere der Endposition des Abstreifers zusätzlich eine ordnungsgemäße Aufnahme des Flusensammelbehälters in dem genannten Sammelraum überwachbar. Der betreffende Flusensammelbehälter weist dazu ebenfalls ein ein Magnetfeld abgebendes magnetisches Teil auf, dessen Magnetfeld auf den Hall-Sensor einwirkt. Durch diese Maßnahme ergibt sich der Vorteil, dass der betreffende eine Hall-Sensor für eine gleichzeitige Überwachung ausgenutzt werden kann, nämlich zum einen für die Überwachung des Erreichens der erwähnten bestimmten festgelegten Bewegungsposition, insbesondere der Endposition durch den Abstreifer und zum anderen für eine ordnungsgemäße Aufnahme des Flusensammelbehälters in dem Sammelraum. Dabei werden nämlich die Magnetfelder der beiden erwähnten magnetischen Teile einander in Kombination unterstützend auf den Hall-Sensor einwirken und von diesem die Abgabe einer den ordnungsgemäßen Betrieb der Vorrichtung anzeigenden Hall-Spannung bewirken.Preferably, with the aforementioned a Hall sensor for monitoring a certain fixed movement position, in particular the end position of the scraper additionally a proper recording of the lint collection container in the said collection chamber monitored. The lint collector in question also has a magnetic field emitting magnetic part, whose magnetic field acts on the Hall sensor. By this measure, there is the advantage that the relevant one Hall sensor can be exploited for simultaneous monitoring, namely, on the one hand for the monitoring of the achievement of said certain fixed movement position, in particular the final position by the scraper and on the other for a proper recording of the lint collector in the collection room. Namely, the magnetic fields of the two mentioned magnetic parts will act in combination to assist the Hall sensor and cause the latter to emit a Hall voltage indicative of the proper operation of the device.
Zweckmäßigerweise ist gemäß der vorliegenden Erfindung eine Vorrichtung, wie sie zuvor spezifiziert worden ist, in einem Hausgerät enthalten, und zwar insbesondere in einem Wasch- oder Wäschetrockner. Ein solcher Trockner ist somit in vorteilhafter Weise hinsichtlich der Flusenabfuhr besonders sicher betreibbar.Conveniently, according to the present invention, a device as previously specified is contained in a domestic appliance, particularly in a washer or dryer. Such a dryer is thus particularly safe to operate in terms of fluff removal in an advantageous manner.
Anhand von Zeichnungen wird die Erfindung nachstehend an einigen Ausführungsbeispielen nähert erläutert. In den Zeichnungen zeigen
- Fig. 1
- schematisch einen Querschnitt durch einen Wasch- bzw. Wäschetrockner, bei dem die vorliegende Erfindung angewandt sein kann,
- Fig. 2
- in einer schematischen Darstellung und zum Teil im Schnitt eine Vorrichtung gemäß einer ersten Ausführungsform der Erfindung mit einer ersten Sensoranordnung,
- Fig. 3
- in einer schematischen Darstellung und zum Teil im Schnitt eine Vorrichtung gemäß einer zweiten Ausführungsform der Erfindung mit einer zweiten Sensoranordnung,
- Fig. 4
- in einer ausschnittweisen schematischen Darstellung und zum Teil im Schnitt eine Vorrichtung gemäß einer dritten Ausführungsform der Erfindung mit einer dritten Sensoranordnung,
- Fig. 5
- in einer ausschnittweisen schematischen Darstellung und zum Teil im Schnitt eine Vorrichtung gemäß einer vierten Ausführungsform der Erfindung mit einer vierten Sensoranordnung,
- Fig. 6
- schematisch in einer ausschnittweisen schematischen Darstellung und zum Teil im Schnitt eine Vorrichtung gemäß einer fünften Ausführungsform der Erfindung mit einer fünften Sensoranordnung,
- Fig. 7
- in einer vereinfachten schematischen Darstellung eine sechste Sensoranordnung, die anstelle der in den Vorrichtungen gemäß
Fig. 2 vorgesehenen Sensoranordnungen dort einsetzbar ist, undbis 6 - Fig. 8
- in einer vereinfachten schematischen Darstellung eine siebte Sensoranordnung, die anstelle der in den Vorrichtungen gemäß
Fig. 2 vorgesehenen Sensoranordnungen dort einsetzbar ist.bis 6
- Fig. 1
- FIG. 2 schematically shows a cross-section through a laundry dryer to which the present invention can be applied; FIG.
- Fig. 2
- 2 is a schematic representation, partly in section, of a device according to a first embodiment of the invention with a first sensor arrangement;
- Fig. 3
- 2 is a schematic representation, partly in section, of a device according to a second embodiment of the invention with a second sensor arrangement;
- Fig. 4
- in a sectional schematic representation and partly in section, a device according to a third embodiment of the invention with a third sensor arrangement,
- Fig. 5
- 1 in a sectional schematic representation and partly in section, a device according to a fourth embodiment of the invention with a fourth sensor arrangement,
- Fig. 6
- schematically in a fragmentary schematic representation and partly in section, a device according to a fifth embodiment of the invention with a fifth sensor arrangement,
- Fig. 7
- in a simplified schematic representation of a sixth sensor arrangement, instead of in the devices according to
Fig. 2 to 6 provided sensor arrangements can be used there, and - Fig. 8
- in a simplified schematic representation of a seventh sensor arrangement, instead of in the devices according to
Fig. 2 to 6 provided sensor arrangements can be used there.
Bevor auf die einzelnen Zeichnungen näher eingegangen wird, sei angemerkt, dass in den verschiedenen Zeichnungen gleiche Elemente bzw. Teile durch gleiche Bezugszeichen bezeichnet sind. In Verbindung mit den einzelnen Zeichnungen werden im übrigen nur diejenigen Elemente bzw. Teile näher beschrieben, mit denen sich die in den betreffenden Zeichnungen dargestellten Vorrichtungen von in jeweils zuvor an Hand der Zeichnungen beschriebenen Vorrichtungen unterscheiden.Before going into detail about the individual drawings, it should be noted that in the various drawings, the same elements or parts are denoted by the same reference numerals. Incidentally, in connection with the individual drawings, only those elements or parts with which the devices shown in the respective drawings differ from those described above with reference to the drawings will be described in more detail.
In dem in
In dem auf den fallenden Abschnitt 4 folgenden horizontalen Abschnitt 5 ist ein Wärmetauscher 10 vorgesehen, in welchem der Luftstrom zur Auskondensation mitgeführten Wasserdampfes abgekühlt wird. Kondensiertes Wasser wird durch an sich bekannte und in
In der Darstellung gemäß
Der tunnelförmige Hohlkörper 14 weist in seiner Längsrichtung zwei gegenüberliegende Endbereiche 15, 16 auf, zwischen denen ein Abstreifer 17 vorzugsweise lediglich in Längsrichtung des betreffenden Hohlkörpers 14 hin- und herbewegbar, wie dies durch einen in
Die zuvor erwähnte Hin- und Herbewegung des Abstreifers 17 in dem tunnelförmigen Hohlkörper 14 und damit längs des Siebes 8 bewirkt hier beispielsweise ein elektrischer Antrieb, der einen in
Die Überwachungs- und Steuereinrichtung 22, bei der es sich beispielsweise um einen Mikrocontroller mit eigener Software handeln kann, ist gemäß
In
Während sich der Hall-Sensor 25 in einem bestimmten ersten Abstand oberhalb des Öffnungsbereichs 16 des tunnelförmigen Hohlkörpers 14 befindet, ist der erwähnte zweite Hall-Sensor 26 in einem demgegenüber geringeren zweiten Abstand nahe des anderen, geschlossenen Endbereiches 15 des tunnelförmigen Hohlkörpers 14 angeordnet. Auf diese Anordnungssituation wird weiter unten noch näher eingegangen.While the
Um die beiden bei der Ausführungsform gemäß
An dem in
Zur Lage des in
Durch den vorstehend erläuterten Aufbau der in
Wird die zumindest eine bestimmte festgelegte Bewegungsposition von dem Abstreifer 17 im Zuge seiner Bewegung nicht erreicht, so wird dies - beispielsweise nach Ablauf einer bestimmten Zeitspanne seit Veranlassung der betreffenden Bewegung - als Störfall gewertet und beispielsweise durch ein von der Überwachungs- und Steuereinrichtung 22 abgegebenes Melde- und/oder Anzeigesignal signalisiert.If the at least one specific fixed movement position is not reached by the
In
Im Unterschied zu den bei der Vorrichtung gemäß
Hinsichtlich der grundsätzlichen Überwachungsfunktionen entspricht die in
Im Hinblick auf die Weiterleitung der an den Anschlüssen A1 und A2 des Abstreifers 17 auftretenden Spannung zu der Überwachungs- und Steuereinrichtung 22 sei hier noch angemerkt, diese Weiterleitung in
Die Überwachungs- und Steuereinrichtung 22 kann, obwohl dies in
Für die Überwachung des ordnungsgemäßen Einsetzens des Sammelbehälters 19 in dessen Sammelraum ist bei der Ausführungsform gemäß
Zusätzlich können weitere Sensoren längs der Bewegungsbahn des Abstreifers 17 angeordnet und durch diesen im Zuge seiner Bewegung betätigbar sein. Alle derartigen Sensoren sind ebenfalls mit der Überwachungs- und Steuereinrichtung 22 verbunden.In addition, further sensors can be arranged along the path of movement of the
Somit vermag auch die Vorrichtung gemäß
In der Überwachungs- und Steuereinrichtung 22 kann die jeweils erreichte Zählerstellung des Zählers 43 überwacht und ausgewertet werden. Die betreffende Zählerstellung des Zählers 43 kann dabei dadurch erreicht werden, dass die aus der erwähnten Lichtquelle 39 und dem Lichtempfänger 40 bestehende Lichtschranke an einer von der Bewegungsendposition des Abstreifers 17 entfernt liegenden Position, insbesondere an der Bewegungsausgangsposition des betreffenden Abstreifers 17 angeordnet ist und dass dann die Anzahl der durch die Durchtrittsöffnungen 42 in dem Transportband 41 mittels des Lichtempfängers 40 ermittelten Lichtsignale entsprechend dem Abstand zwischen der betreffenden Lichtschranke und der Bewegungsendposition des Abstreifers 17 gezählt und mit einem vorgegebenen Referenz-Zählwert verglichen werden. Dieser Referenz-Zählwert gibt die Anzahl der Zählsignale an, die bei ordnungsgemäßem Transport des Abstreifers 17 mittels des Transportbandes 41 durch zwischen die erwähnte Lichtschranke gelangende Durchtrittsöffnungen 42 in dem Transportband 41 zu zählen sind. Entspricht die durch den erwähnten Zähler 43 im Zuge der Bewegung des erwähnten Transportbandes 41 in die erwähnte Bewegungsendposition des Abstreifers 17 erreichte Zählerstellung dem Referenz-Zählwert, so wird dies dafür gewertet, dass der Abstreifer 17 durch das Transportband 41 in die festgelegte, bestimmte Bewegungsposition - im vorliegenden Fall in eine Bewegungsendposition - bewegt worden ist. Wird ein Unterschied zwischen der Zählerstellung des Zählers 43 und dem betreffenden Referenz-Zählwert festgestellt - beispielsweise nach Ablauf einer bestimmten Zeitspanne seit Beginn der Bewegung des Transportbandes 41, so wird dies bezüglich des Transports des Abstreifers 17 als Fehlerfall angesehen, der gegebenenfalls zur Stillsetzung des Betriebs und/oder zur Anforderung von Servicepersonal genutzt werden kann.In the monitoring and
In Abweichung von den zuvor betrachteten Verhältnissen kann das Transportband 41 gegebenenfalls auch mit lediglich einer einzigen Durchtrittsöffnung 42 versehen sein, die in einem ganz bestimmten Abstand von dem Abstreifer 17 in dem Transportband 41 enthalten ist. In diesem Fall kann die zuvor erwähnte Lichtschranke bestehend aus der Lichtquelle 39 und dem Lichtempfänger 40 längs der Bewegungsbahn des Abstreifers 17 an einer Stelle angeordnet sein, die im gleichen Abstand wie dem gerade erwähnten Abstand von der Bewegungsendposition des Abstreifers 17 entfernt ist. Die Ermittlung bzw. die Nichtermittlung der betreffenden einen Durchtrittsöffnung 42 in dem Transportband 41 mittels der erwähnten Lichtschranke kann dann dahingehend gewertet werden, dass der Abstreifer 17 durch das Transportband 41 ordnungsgemäß bzw. nicht ordnungsgemäß transportiert worden ist. Auch in diesem Fall können wie im zuvor betrachteten Fall entsprechende Anzeige- bzw. Meldesignale abgegeben werden.In a departure from the conditions considered above, the
Abschließend sei noch angemerkt, dass die vorliegende Erfindung auf Vorrichtungen mit den vorstehend betrachteten und erläuterten Sensoranordnungen nicht beschränkt ist. Vielmehr können anstelle der angegebenen Sensoranordnungen auch andere, hier nicht betrachtete Sensoranordnungen eingesetzt werden, wie z.B. akustische oder kapazitive Sensoranordnungen. Im übrigen können die bei den vorstehend erläuterten Ausführungsbeispielen vorgesehenen Sensoranordnungen anders als in den zuvor beschriebenen Figuren gezeigt in unterschiedlichsten Kombinationen eingesetzt sein.Finally, it should be noted that the present invention is not limited to devices with the sensor arrangements considered and explained above. Rather, instead of the specified sensor arrangements, other sensor arrangements not considered here can also be used, such as acoustic or capacitive sensor arrangements. Otherwise, in the above-described embodiments provided sensor arrangements other than in the previously described figures shown in various combinations.
- 11
- WäscheLaundry
- 22
- Trommeldrum
- 33
- Achseaxis
- 44
- Kanalsystem, fallender AbschnittChannel system, falling section
- 55
- Kanalsystem, horizontaler AbschnittCanal system, horizontal section
- 66
- Kanalsystem, steigender AbschnittCanal system, rising section
- 77
- Lagerschildend shield
- 88th
- Siebscree
- 99
- Flusenfluff
- 1010
- Wärmetauscherheat exchangers
- 1111
- Gebläsefan
- 1212
- Heizeinrichtungheater
- 1313
- Türdoor
- 1414
- tunnelförmiger Hohlkörpertunnel-shaped hollow body
- 1515
- Endbereichend
- 1616
- Endbereichend
- 1717
- Abstreiferscraper
- 1818
- Doppelpfeildouble arrow
- 1919
- SammelbehälterClippings
- 2020
- Elektromotorelectric motor
- 2121
- Antriebsspindeldrive spindle
- 2222
- Überwachungs- und SteuereinrichtungMonitoring and control device
- 2323
- Eingangsanschlussinput port
- 2424
- Schalterswitch
- 2525
- Hall-SensorHall sensor
- 2626
- Hall-SensorHall sensor
- 2727
-
magnetisches Teil 27, Permanentmagnet
magnetic part 27, permanent magnet - 2828
-
magnetisches Teil 27, Permanentmagnet
magnetic part 27, permanent magnet - 2929
- Reed-KontaktReed contact
- 3030
- Reed-KontaktReed contact
- 3131
- Reed-KontaktReed contact
- 3232
- Abstreifelementestripping
- 3333
- Abstreifelementstripping element
- 34, 3534, 35
- elektrisch leitende Kontakteelectrically conductive contacts
- 3636
- Mikroschaltermicroswitch
- 3737
- Mikroschaltermicroswitch
- 3838
- Stegteilweb member
- 3939
- Lichtquelle, LichtabgabeelementLight source, light-emitting element
- 4040
- Lichtempfänger, FototransistorLight receiver, phototransistor
- 4141
- Transportbandconveyor belt
- 4242
- DurchtrittsöffnungenThrough openings
- 4343
- Zählercounter
- 4444
- Lichtreflexionsbereich, ReflexionsbereichLight reflection area, reflection area
Claims (14)
- Method for drying laundry by means of an air flow, comprising a drum for receiving laundry and a channel system for guiding the air flow,
wherein the channel system has a section arranged downstream of the drum in which the air flow is guided in a downward direction and in which a filter for capturing lint from the air flow is arranged and the filter is assigned a wiper performing movement for wiping off captured lint as well as a collection chamber with an opening for receiving wiped lint, characterised in that as part of said movement of the wiper (17) it is monitored, by means of a sensor array (25, 26; 30, 31; 32; 33, 34, 35; 37, 38; 39, 40), whether a specific defined movement position has been reached. - Method according to claim 1, characterised in that, when the at least one specific defined movement position is reached, a sensor signal is emitted by the wiper (17).
- Method according to claim 1 or 2, characterised in that a correct placement of a lint collection container (19) in the collection chamber is also monitored.
- Method according to claim 3, characterised in that the correct placement of the lint collection container (19) in the collection chamber is monitored by evaluating at least one sensor signal triggered by the placement concerned.
- Method according to one of claims 1 to 4, characterised in that, if it is ascertained that an incorrect operation of the wiper (17) takes place as part of the aforementioned monitoring, a notification signal is emitted.
- Apparatus for performing the method according to one of claims 1 to 5, for drying laundry by means of an air flow, comprising a drum for receiving laundry and a channel system for guiding the air flow, wherein the channel system has a section arranged downstream of the drum in which the air flow is guided in a downward direction and in which a filter for capturing lint from the air flow is arranged and the filter is assigned a wiper performing movement for wiping off captured lint as well as a collection chamber with an opening for receiving wiped lint,
characterised in that a movement of the wiper (17) can be monitored by means of a sensor array (25, 26; 30, 31; 32; 33, 34, 35; 37, 38; 39, 40), with respect to whether at least one specific defined movement position has been reached. - Apparatus according to claim 6, characterised in that a correct placement of a lint collection container (19) provided for the collection of lint to be discharged from the wiper (17) in the collection chamber can be monitored.
- Apparatus according to claim 7, characterised in that the correct placement of the lint collection container (19) in the collection chamber can be monitored by means of a separate sensor array (28, 25; 27, 29; 36).
- Apparatus according to one of claims 6 to 8, characterised in that the respective sensor array is formed by a tactile or contactless sensor (32; 33, 34, 35; 37, 38; 25, 26, 27, 28; 39, 40, 42; 39, 40, 44).
- Apparatus according to claim 9, characterised in that a switch or limit switch (33, 34, 35) or a piezo-element (32) is provided as tactile sensor.
- Apparatus according to claim 9, characterised in that at least one Hall sensor (25, 26), a photoelectric barrier (39, 30, 42) or an inductive sensor are provided as contactless sensors.
- Apparatus according to claim 11, characterised in that, if a Hall sensor (25) is used for monitoring the at least one specific defined movement position of the wiper (17), a magnetic part (27) emitting a magnetic field is attached thereto and the Hall sensor (25) is arranged with a fixed position with regard to the magnetic part (27) concerned.
- Apparatus according to claims 12 and 7, characterised in that with said Hall sensor (25) for monitoring a specific defined movement position, in particular an end position of the wiper (17), a correct accommodation of the lint collection container (19) in the collection chamber can be monitored such that the lint collection container (19) has a magnetic part (28) emitting a magnetic field, the magnetic field of which also acts on the Hall sensor (25).
- Domestic appliance, in particular washing machine or tumble dryer with an apparatus according to one of claims 6 to 13.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006060031A DE102006060031A1 (en) | 2006-12-19 | 2006-12-19 | Method and apparatus for drying laundry by means of an air flow and household appliance containing such a device |
PCT/EP2007/062544 WO2008074581A1 (en) | 2006-12-19 | 2007-11-20 | Method and device for drying laundry by means of an air current, and household appliance containing such a device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2126187A1 EP2126187A1 (en) | 2009-12-02 |
EP2126187B1 true EP2126187B1 (en) | 2016-08-10 |
Family
ID=39358073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07822723.8A Active EP2126187B1 (en) | 2006-12-19 | 2007-11-20 | Method and device for drying laundry by means of an air current, and household appliance containing such a device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2126187B1 (en) |
DE (1) | DE102006060031A1 (en) |
PL (1) | PL2126187T3 (en) |
WO (1) | WO2008074581A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9062410B2 (en) | 2008-12-17 | 2015-06-23 | Lg Electronics Inc. | Dryer and foreign material removing apparatus thereof |
RU2540760C2 (en) * | 2010-05-04 | 2015-02-10 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Device for clothes treatment with units for removal, collection and pressing of filter substance |
KR101768102B1 (en) * | 2011-03-29 | 2017-08-14 | 엘지전자 주식회사 | Auto-filter of clothes dryer and driving method for auto-filter of clothes dryer |
BR112013005385A2 (en) | 2011-12-08 | 2016-06-07 | Lg Electronics Inc | method for controlling a dryer and determining a source of obstruction in a dryer. |
KR101861674B1 (en) * | 2011-12-19 | 2018-07-02 | 엘지전자 주식회사 | A controlling methoed for a filter assembly of dryer |
KR101842199B1 (en) * | 2012-01-05 | 2018-03-26 | 엘지전자 주식회사 | A dryer |
KR102029241B1 (en) * | 2012-12-07 | 2019-10-07 | 엘지전자 주식회사 | Control Method for Laundry Treating Apparatus |
KR101993226B1 (en) * | 2012-12-31 | 2019-06-26 | 엘지전자 주식회사 | Laundry Treating Apparatus |
KR102052970B1 (en) * | 2012-12-31 | 2019-12-06 | 엘지전자 주식회사 | Laundry Treating Apparatus |
EP3816337B1 (en) | 2019-10-31 | 2024-01-03 | Arçelik Anonim Sirketi | A dryer comprising a self-cleaning filter |
DE102022110397A1 (en) | 2022-04-28 | 2023-11-02 | Miele & Cie. Kg | Machine for drying laundry |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3224948A1 (en) * | 1982-06-03 | 1983-12-08 | Herbert Kannegiesser Gmbh + Co, 4973 Vlotho | Appliance for the smoothing of articles of clothing |
DE4403183C2 (en) * | 1994-02-02 | 2000-11-02 | Bsh Bosch Siemens Hausgeraete | Household clothes dryer |
DE29903042U1 (en) * | 1999-02-19 | 1999-05-06 | Elektromanufaktur Zangenstein Hanauer Gmbh & Co., 92507 Nabburg | Device for monitoring a fluff filter |
DE19919407A1 (en) * | 1999-04-28 | 2000-11-02 | Bsh Bosch Siemens Hausgeraete | Automatically for cleaning lint filter device for household clothes dryers |
DE19924297A1 (en) * | 1999-05-27 | 2000-11-30 | Bsh Bosch Siemens Hausgeraete | Process for operating a household clothes dryer with a self-cleaning lint filter |
DE19952751B4 (en) * | 1999-11-02 | 2009-01-02 | BSH Bosch und Siemens Hausgeräte GmbH | Clothes dryer with a self-cleaning lint filter |
US6779279B2 (en) * | 2002-07-09 | 2004-08-24 | Lg Electronics Inc. | Dryer having a filter sensing system |
DE10349712B4 (en) * | 2003-10-23 | 2007-03-01 | Miele & Cie. Kg | Method for drying laundry and tumble dryer for performing the method |
FR2865881B1 (en) * | 2004-01-29 | 2006-04-14 | Mathieu Garin | HEADPHONES |
US6971186B1 (en) * | 2004-02-11 | 2005-12-06 | Chin Tj | Lint filter assembly for use in a dryer |
JP4400404B2 (en) * | 2004-10-08 | 2010-01-20 | パナソニック株式会社 | Washing and drying machine |
US7040039B1 (en) * | 2004-12-23 | 2006-05-09 | Richard Stein | Clothes dryer with lint detector |
US8038517B2 (en) * | 2005-09-13 | 2011-10-18 | Fujitsu General Limited | Air conditioner and method for assembling the same |
DE102005054684A1 (en) * | 2005-11-16 | 2007-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Apparatus for drying laundry by means of an air flow |
-
2006
- 2006-12-19 DE DE102006060031A patent/DE102006060031A1/en not_active Withdrawn
-
2007
- 2007-11-20 WO PCT/EP2007/062544 patent/WO2008074581A1/en active Application Filing
- 2007-11-20 EP EP07822723.8A patent/EP2126187B1/en active Active
- 2007-11-20 PL PL07822723T patent/PL2126187T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102006060031A1 (en) | 2008-06-26 |
PL2126187T3 (en) | 2017-02-28 |
EP2126187A1 (en) | 2009-12-02 |
WO2008074581A1 (en) | 2008-06-26 |
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