EP2126187B1 - Verfahren und vorrichtung zum trocknen von wäsche mittels eines luftstromes sowie eine solche vorrichtung enthaltendes hausgerät - Google Patents

Verfahren und vorrichtung zum trocknen von wäsche mittels eines luftstromes sowie eine solche vorrichtung enthaltendes hausgerät Download PDF

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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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Active
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EP07822723.8A
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German (de)
English (en)
French (fr)
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EP2126187A1 (de
Inventor
Hasan Gökcer ALBAYRAK
Kai Nitschmann
Roman Goldberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP2126187A1 publication Critical patent/EP2126187A1/de
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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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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP07822723.8A 2006-12-19 2007-11-20 Verfahren und vorrichtung zum trocknen von wäsche mittels eines luftstromes sowie eine solche vorrichtung enthaltendes hausgerät Active EP2126187B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060031A DE102006060031A1 (de) 2006-12-19 2006-12-19 Verfahren und Vorrichtung zum Trocknen von Wäsche mittels eines Luftstromes sowie eine solche Vorrichtung enthaltendes Hausgerät
PCT/EP2007/062544 WO2008074581A1 (de) 2006-12-19 2007-11-20 Verfahren und vorrichtung zum trocknen von wäsche mittels eines luftstromes sowie eine solche vorrichtung enthaltendes hausgerät

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EP2126187A1 EP2126187A1 (de) 2009-12-02
EP2126187B1 true EP2126187B1 (de) 2016-08-10

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EP (1) EP2126187B1 (pl)
DE (1) DE102006060031A1 (pl)
PL (1) PL2126187T3 (pl)
WO (1) WO2008074581A1 (pl)

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KR101842199B1 (ko) * 2012-01-05 2018-03-26 엘지전자 주식회사 건조기
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PL2126187T3 (pl) 2017-02-28
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EP2126187A1 (de) 2009-12-02

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