EP2500459B2 - Procédé et dispositif de lavage, en particulier de pièces de linge - Google Patents

Procédé et dispositif de lavage, en particulier de pièces de linge Download PDF

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Publication number
EP2500459B2
EP2500459B2 EP12001271.1A EP12001271A EP2500459B2 EP 2500459 B2 EP2500459 B2 EP 2500459B2 EP 12001271 A EP12001271 A EP 12001271A EP 2500459 B2 EP2500459 B2 EP 2500459B2
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EP
European Patent Office
Prior art keywords
treatment liquid
filter
drum
outer drum
filtered
Prior art date
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Active
Application number
EP12001271.1A
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German (de)
English (en)
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EP2500459B1 (fr
EP2500459A1 (fr
Inventor
Wilhelm Bringewatt
Engelbert Heinz
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.)
Herbert Kannegiesser GmbH and Co
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Herbert Kannegiesser GmbH and Co
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Application filed by Herbert Kannegiesser GmbH and Co filed Critical Herbert Kannegiesser GmbH and Co
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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/10—Filtering arrangements
    • 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
    • D06F31/00—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies
    • D06F31/005—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies consisting of one or more rotating drums through which the laundry passes in a continuous flow
    • 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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements

Definitions

  • the invention relates to a method for washing, in particular, items of laundry according to the preamble of claim 1. Furthermore, the invention relates to a device for washing, in particular, items of laundry according to the preamble of claim 7 (see US-A-20050120758 ).
  • the washing namely the actual laundry and the rinsing, of objects of all kinds, in particular items of laundry, takes place in washing machines that have a drum that can be driven in rotation and to which at least one stationary and liquid-tight outer drum is assigned.
  • the at least one outer drum extends over at least part of the drum, in particular part of the length of the drum that can be driven in rotation.
  • the washing takes place in the drum with a treatment liquid which may contain treatment additives.
  • the treatment liquid occupies only a lower part of the drum.
  • the level that is to say the surface of the treatment liquid, is preferably somewhat below the axis of rotation of the drum.
  • the treatment liquid is also located in the liquid-tight outer drum. Through a perforation of the rotating drum in the area of the respective outer drum, the treatment liquid in the outer drum can reach the lower area of the rotating drum, where the treatment liquid comes into contact with the objects to be washed in the rotating drum, in particular items of laundry.
  • foam formation occurs, which is primarily caused by the treatment additives in the treatment liquid.
  • the foam is deposited with at least partially bound lint from the laundry to be washed on the surface of the treatment liquid.
  • the treatment liquid absorbs dirt washed out of the laundry and possibly foreign substances, which are for the most part heavier than the treatment liquid and therefore collect in the bottom area of the outer drum.
  • the foam and dirt affect the effectiveness of the washing process.
  • washing machine From the US-A-2005/0120758 a washing machine is known to which a filter for filtering out heavy contaminants from the treatment liquid that collects on the bottom of the outer drum is known. This washing machine does not provide any possibility of separating lighter contaminants, in particular foam with lint partially bound therein, from the treatment liquid.
  • the invention is based on the object of creating a method and a device for washing and / or rinsing items of laundry and other objects more effectively.
  • the treatment liquid preferably always only part of the treatment liquid, is filtered outside the drum and the at least one outer drum assigned to it during the treatment, that is to say in particular the washing and rinsing of the laundry items or other objects. Because the filtering takes place during the washing process, accompanying substances which impair the washing process are successively removed from the treatment liquid. The washing can then be carried out more effectively because of the lower pollution of the treatment liquid by the accompanying substances. Filtering outside the washing machine does not affect the washing process. Furthermore, lighter and heavier constituents are optionally, in particular alternately, filtered out of the treatment liquid.
  • Components such as foam, lint or the like that collect on the surface of the treatment liquid and heavy components such as dirt particles, foreign matter or the like that sink to the bottom of the outer drum can thus be gradually filtered out of the treatment liquid.
  • the treatment liquid is removed from the outer drum in the area of its surface, namely on the surface or just below the surface, while the treatment liquid with heavier components below the surface of the treatment liquid, especially on the bottom or in the Area of the bottom of the outer drum, is withdrawn from the same. Due to the various options for removing the treatment liquid to be filtered from the outer drum, the filter has several functions in that it can filter both lighter and heavier components separately or together from the treatment liquid.
  • the treatment liquid is preferably filtered continuously during washing.
  • accompanying substances newly accumulating in the treatment liquid during the washing process in particular foam, lint, dirt residues and the like, are gradually filtered out, preferably continuously, in particular during the entire washing process.
  • the continuous filtering of the treatment liquid takes place in such a way that the treatment liquid is pumped successively in a circuit through or over the filter.
  • part of the treatment liquid is always subjected to filtering, while the remaining part, especially a large part, of the treatment liquid remains in the outer drum of the drum that can be rotated, whereby the washing process is carried out despite the successive and / or continuous filtering of part of the treatment liquid that takes place at the same time sustained without sacrificing performance.
  • a continuous flow of the treatment liquid is drained from the outer drum at at least one outlet and this treatment liquid is fed back to the outer drum after filtering.
  • a small part of the treatment liquid is always led past the filter in the circuit and the treatment liquid to be filtered is continuously applied to the filter.
  • the volume flow of the treatment liquid that is passed over the filter is selected so that it corresponds to the performance of the filter and the amount of treatment liquid remaining in the outer drum and the drum containing the laundry to be treated is not significantly reduced, so that the level of the Treatment liquid in the drum does not fall below the target level.
  • the at least one filter is also used to filter treatment liquid to be drained from the outer drum at the end of the washing process. This enables the same filter to be used again.
  • the treatment liquid to be drained from the outer drum can also be completely filtered.
  • the filtered treatment liquid is preferably passed into a storage tank. The filtered and used treatment liquid can be fed to a suitable reuse from the collection or storage tank.
  • the treatment liquid is filtered with a gravity filter.
  • the treatment liquid can thereby flow freely through the filter, the filtered treatment liquid being separated from the filtered out constituents due to gravity.
  • the liquid can flow freely to the filter by gravity.
  • the treatment liquid following gravity is applied evenly to the filter, and the filtering is carried out in the same way.
  • the flow rate or the amount of the treatment liquid fed to the filter per unit of time can be adjusted or changed by, for example, an adjustable throttle valve in a feed line to the filter.
  • the treatment liquid supplied to the filter per unit of time can be adapted to the performance of the filter and thus optimal filtering can be brought about.
  • a device for solving the object mentioned at the beginning which is preferably a washing machine, has the features of claim 7. Because a circulating line with a filter is assigned to at least one outer drum, the treatment liquid can be filtered during the washing process, namely the prewash, clarifying wash and / or rinsing, in particular continuously. As a result, the washing process always has at its disposal at least some of the treatment liquid that has been freed from components that impair the washing process, especially foam.
  • the circulation line is provided with several, in particular individually lockable, drains from the respective outer drum. In this case, an upper drain is arranged in the area of the level of the treatment liquid in the drum and the outer drum, while another drain is preferably provided in the area of the bottom or in the bottom of the outer drum.
  • both treatment liquid with accompanying substances floating on it from the area of the surface of the treatment liquid and treatment liquid with sinking accompanying substances can be drawn off from the outer drum.
  • at least one drain can be shut off, it is possible to selectively withdraw treatment liquid from the outer drum from above or below or, if desired, also to remove treatment liquid with floating and sunk accompanying substances from the outer drum at the same time.
  • Another advantageous embodiment of the device provides for at least one pump to be provided in the circulation line or circulation line, preferably seen in the flow direction of the treatment liquid, behind the at least one filter.
  • the pump can pump the filtered liquid back into the same, possibly also another, outer drum from which the treatment liquid has been removed, even if the point of introduction of the filtered liquid into the outer drum is higher than the filter.
  • the circulation line is connected, preferably downstream of the pump, to a preferably shut-off inflow to the outer drum.
  • the circulation line can have an outlet to which at least one collecting tank is preferably assigned.
  • the drain can be located upstream of the pump, as seen in the direction of flow, if the filtered treatment liquid can be drained off by gravity.
  • the at least one filter is designed as a gravity filter.
  • This filter works automatically.
  • the treatment liquid to be filtered does not need to be pumped through the gravity filter by a pump. Rather, due to its potential energy, the treatment liquid can automatically flow from the outer drum to the filter and through or over the same.
  • Such a filter can be designed as a sieve, through the opening of which the treatment liquid to be filtered flows, but retains both heavier and lighter accompanying substances, so that these have a straight, inclined and / or curved course on the filter surface formed by the sieve can, are dissipatable.
  • a flowing fluid can be applied to it , for example by spray nozzles under the preferably sieve-like filter surface.
  • the invention is particularly suitable for devices that are designed in the manner of commercial washing machines, namely so-called conveyor-type washing machines.
  • a washing machine has an elongated drum that can be driven in rotation as a whole and has several successive chambers, with at least one chamber being assigned an outer drum.
  • An outer drum is usually located where treatment liquid, such as prewash liquid, main wash liquid and / or rinsing liquid, can be drained from the drum or liquids can be fed to the drum.
  • the invention makes it possible, in a conveyor-type washing machine, to filter only the treatment liquid present in the chamber in question, preferably continuously, during the washing process, in particular both lighter constituents and heavy constituents successively, but continuously, above all continuously, at least partially to be removed from the treatment liquid in the relevant chamber.
  • the invention is described below with reference to a device designed as a conveyor washing machine 10 for washing and rinsing items of laundry.
  • the invention is not restricted to this.
  • the conveyor-type washing machine 10 shown schematically has a cylindrical drum 12 which can be driven to rotate about a preferably horizontal axis of rotation 11.
  • the axis of rotation 11 lies on the longitudinal center axis of the drum 12.
  • the laundry to be washed is (based on the Fig. 1 ) transported from left to right in treatment direction 13 through the rotating drum 12.
  • a plurality of chambers 15 following one another in the treatment direction 13 are formed by transversely directed partition walls 14.
  • the chambers 15 can be of the same size, but also of different sizes.
  • the partition walls 14 have central or eccentric (on the edge) openings, which are not shown in the figure. Through the openings, the laundry can be reloaded in batches in the treatment direction 13 from one chamber 15 to the next chamber 15.
  • the one in the Fig. 1 The conveyor washing machine 10 shown has twelve chambers 15. However, the invention is not limited to this.
  • the conveyor washing machine 10 can have a larger or smaller number of chambers 15.
  • the first four chambers 15 seen in the treatment direction 13 form a pre-wash zone 16 in the conveyor-type washing machine 10 shown.
  • the following five chambers 15 form a main wash zone 17.
  • Seen in the treatment direction 13, the main wash zone 17 is followed by a rinsing zone 18 with three consecutive chambers 15.
  • the pre-wash zone 16 , Main wash zone 17 and rinsing zone 18 can be one of the in the Fig. 1
  • the illustrated embodiment of the conveyor washing machine 10 have a different number of chambers 15. It is also conceivable that at least one further in the rinsing zone 18 Fig. 1 Chamber (not shown) for forming a finishing zone follows.
  • the rinsing zone 18 can also be absent.
  • the last chamber 15 of the prewash zone 16, the main wash zone 17 and the rinsing zone 18 each have an outer drum 19.
  • an outer drum 19 is assigned to the first chamber 15 of the main wash zone 17 and the rinsing zone 18. All outer drums 19 are designed to be equally impermeable to liquids. So that treatment liquid for the laundry in the outer drum 19 can communicate with the section of the drum 12 extending over the relevant chamber 15 with an outer drum 19, the drum 12 is at least partially for treatment liquid in areas of those chambers 15 to which an outer drum 19 is assigned designed to be permeable, in particular perforated.
  • treatment liquid can pass from the respective outer drum 19 into the liquid-permeable section of the drum 12 assigned to the chamber 15, and vice versa.
  • the treatment liquid in the respective chamber 15 has a desired level.
  • the water level is preferably a little below the axis of rotation 11 ( Fig. 2 and 3 ). Consequently, the surface of the treatment liquid in the relevant chamber 15 is also somewhat below the axis of rotation 13.
  • each of the identically designed outer drums 19 has an expansion, preferably designed in the manner of a connection box, in the lower region. This expansion takes up a supply of the treatment liquid under the drum 12.
  • Components that are lighter than the treatment liquid for example foam, lint and the like, collect on the surface of the treatment liquid.
  • the lint is preferably at least largely bound in the foam.
  • Solid constituents of the treatment liquid, which are heavier than the treatment liquid can collect on a base 20 of the outer drum 19, which is expanded at the bottom to form the connection box.
  • the heavier components are dirt washed out of the laundry and other solids, for example small foreign bodies, which can pass through the perforation of the drum 12 in the area of the respective chamber 15 with the outer drum 19.
  • the outer drum of the last chamber of the main wash zone 17 and the outer drum 19 of the last chamber 15 of the rinsing zone 18 are each assigned a circulation line 21 with a filter 22. These are formed identically at the end of the main wash zone 17 and at the end of the rinsing zone 18. Both the circulation line 21 and the respective filter 22 are located outside the drum 12 and the outer drum 19.
  • the respective filter 22 and the circulation line 21 assigned to it are preferably assigned to a frame 23 of the conveyor-type washing machine 10, in particular attached to it.
  • the filters 22 can, however, also be located at a different point in the laundry away from the conveyor-type washing machine 10. Seen in the direction of flow of the treatment liquid through the circulation line 21, a pump 24 is provided behind the or each filter 22 for pumping the filtered treatment liquid back into the respective outer drum 19.
  • FIGS. 2 to 5 show in more detail the circulation line 21 and the filter 22 assigned to it in the area of the last chamber 15 of the main wash zone 17.
  • the circulation line 21 and the filter 22 in the area of the outer drum 19 of the last chamber 15 of the rinsing zone 18 are formed.
  • the circulation line 21 is divided, namely composed of an initial part seen in the direction of flow to the filter 22 and a return part starting from the filter 22.
  • the circulation line 21 is interrupted in the area of the filter 22, the initial part and the return part of the circulation line 21 being connected in terms of flow through the filter 22.
  • the starting part of the circulation line 21 is double-stranded, namely has a first starting part 25 and a second starting part 26.
  • the first starting part 25 of the circulation line 21 is connected to an outlet 27 of the outer drum 19, which is located in the area of the level or the surface the treatment liquid is located in the chamber 15 to which the outer drum 19 is assigned.
  • the second starting part 26 of the circulation line 21 is connected to a second drain 28 in the floor area, in particular near the floor 20, of the outer drum 19 of the last chamber 15 of the main wash zone 17.
  • the drain 28 can also be provided in the bottom 20 of the outer drum 19.
  • Both starting parts 25 and 26 end in front of the filter 22.
  • the return part of the circulation line 21 is assigned to that side of the filter 22 on which the filtered treatment liquid is obtained.
  • the filtered liquid is pumped back into the outer drum 19 by the pump 24 in the return part of the circulation line 21.
  • an inlet 29 is provided for connecting a rear end of the return part of the circulation line 21 below the surface of the treatment liquid on the outer drum 19.
  • an outlet line 30 branches off behind the pump 24, which leads to a collecting tank 31 or opens into the collecting tank 31.
  • a valve 32 is assigned to the second starting part 26 of the circulation line 21.
  • This is preferably an adjustable throttle valve, with which the flow rate of the treatment liquid through the second initial part 26 can be changed, but the second initial part 26 can also be closed.
  • the inflow of treatment liquid from the bottom area of the outer drum 19 to the filter 22 can be completely prevented or changed with regard to the volume flow of the treatment liquid per unit of time to the filter 22, for example to adapt the capacity of the filter 22 the circulation line 21 a simple shut-off valve or an adjustable throttle valve can be arranged.
  • valve 33 is located in the return part of the circulation line 21, namely behind the branch of the outlet line 30 from the circulation line 21, seen in the direction of flow of the treatment liquid.
  • a valve 34 is also assigned to the outlet line 30. The outflow of the filtered treatment liquid can be controlled in a targeted manner by the valves 33 and 34, specifically either back to the outer drum 19 or into the collecting tank 31.
  • the filter 22 is detailed in FIG Fig. 5 shown.
  • This is a so-called gravity filter, in which the treatment liquid to be filtered flows through a filter sieve 31 due to gravity, namely from the top of the filter sieve 48 to the underside of the same. This can also take place when the treatment liquid to be filtered flows along the filter sieve 48.
  • the filter screen 48 is arranged in a preferably completely closed housing 35. If necessary, the top of the housing 35 can be open.
  • the housing 35 has (seen from the side) an inclined course with an inclined bottom 36. The ends of the two initial parts 25 and 26 of the circulating line 21 are guided at the highest point into the inclined housing 35 from above.
  • the filter screen 48 is also fastened in an oblique direction in the housing 35.
  • the filter screen 48 divides the housing 35 into an upper part 37 located above the surface of the filter screen 34 and a lower part 38 located below the filter screen 48.
  • the filter screen 48 can be made of a perforated sheet metal with a uniform grid of through holes of appropriate size or a wire mesh be formed with a corresponding mesh size.
  • the filter screen 48 is preferably designed in two layers.
  • This filter sieve 48 is composed of a lower stable and coarse-meshed support grid and a fine-meshed sieve arranged above it, which is designed like a grid or braided.
  • the optionally flexible screen is then carried by the support grid.
  • the filter screen 48 ends at a distance in front of a transverse wall 39 at the lower end of the housing 35.
  • a height-adjustable transverse weir 40 In front of the end of the filter screen 37 there is a height-adjustable transverse weir 40. By adjusting the height of the plate-like weir 40, a gap is created above the end of the lint filter 34 corresponding width for the derivation of the components filtered out of the treatment liquid.
  • a pivotable flap can also be provided in place of the height-adjustable weir 40.
  • a collecting container 43 for filtered out components can be provided.
  • the collecting container 43 can preferably be removed from the chamber 42 or pulled out of the chamber 42 in the manner of a drawer.
  • the housing 35 has a depression in the base 36 which forms a sump 44.
  • the sump 44 forms a pump reservoir which ensures that when the filter 22 is in operation, the pump 24 is always supplied with sufficient filtered treatment liquid.
  • a float switch 45 is provided in the sump 44, which is used to prevent the pump 24 from running dry.
  • cleaning nozzles 47 directed towards the underside of the filter screen 48 are provided.
  • the cleaning nozzles 47 are distributed in the lower part 38 in such a way that they can apply cleaning fluid to all or at least a large part of the underside of the filter screen 48.
  • the cleaning liquid is preferably fresh water.
  • filtered treatment liquid from the collection tank 31 can also be used. The used cleaning liquid is then pumped back through the return part of the circulation line 21 and the discharge line 30 into the collecting tank 31 or into a drain.
  • the flow rate of the treatment liquid through the circulation line 21 is selected or set on the throttable valve 32 so that the treatment liquid in this chamber 15 is completely circulated at least once and filtered by the filter 22 during a treatment process of the item of laundry in the relevant chamber 15.
  • the method according to the invention is designed in such a way that it enables a multiple function of the filter 22.
  • the filter 22 is therefore used to fulfill different filtering tasks, which are shown schematically in the Figs. 2 to 4 are shown.
  • the Fig. 2 shows the use of the filter 22 for removing those constituents from the treatment liquid which are lighter than the treatment liquid, for example foam, in particular foam including any lint that has been carried along.
  • the foam with possibly the lint collects on the surface 49 of the treatment liquid in the drum 12.
  • the drain 27 which is located in the area of the surface 49 of the treatment liquid, the foam with lint and other lighter constituents together with itself on the surface 49 is drawn off the treatment liquid from the drum 12 and the outer drum 19 via the drain 27 and applied to the filter 22 via the first starting part 25 of the circulation line 21.
  • the treatment liquid with the lighter components reaches the upper part 37 of the housing 35 of the filter 22.
  • the treatment liquid to be filtered with the lighter components to be filtered out flows off on the filter sieve 48. Due to the force of gravity, only the treatment liquid passes through the filter sieve 48, so that it reaches the lower part 38 of the housing 35 of the filter 22 in a filtered manner.
  • the filtered treatment liquid is then pumped by the pump 24 through the circulation line 21 with the valve 33 open to the inlet 29 in the outer drum 19 and the filtered treatment liquid is thus fed back to the washing process, namely the outer drum 19 and the drum 12.
  • the lighter components of the treatment liquid that have been filtered out flow off on the inclined filter sieve 48. Through the gap under the transverse edge 41 of the weir 40, these filtered lighter components, in particular foam and lint, get into the collecting container 43 of the filter 22.
  • lint in particular collects that can be disposed of from time to time by pulling out or taking out the Collection container 43 from the chamber 42 of the housing 35 of the filter 22.
  • Other constituents can collect at another point in the chamber 42 and be discharged from there, for example into a drain.
  • the valves 32 and 34 are closed. Only light constituents are then separated from the treatment liquid and the filtered treatment liquid is continuously pumped back into the conveyor washing machine 10 through the circulation line 21 always remains the same and is only reduced by the treatment liquid located in the circulation line 21 and in the area of the filter 22.
  • the foam carpet on the treatment liquid is reduced and the washing effect is thereby increased, so that stains in particular can be removed more effectively from the laundry.
  • the Fig. 3 schematically illustrates a second purpose of the filter 22.
  • the valve 32 in the second initial part 26 of the circulation line 21 is so wide open or set so that the treatment liquid can be continuously fed to the filter 22 while the laundry is being washed.
  • the valve 32 which is preferably designed as a throttle valve, is set in such a way that only a desired volume flow of the treatment liquid flows through the circulation line 21.
  • the treatment liquid enters the second starting part 26 through the drain 28 arranged close to the bottom 20 of the outer drum 19.
  • the filter 22 With the treatment liquid, heavier components of the same, for example dirt particles removed from the laundry, but also other small solid particles and possibly foreign bodies, reach the filter 22 via the drain 28 and the second initial part 26 of the circulating line 21 filtered out in that the solid constituents are retained by the filter screen 48 and only the treatment liquid flows through the filter screen 48 and is filtered in the process.
  • the filtered treatment liquid is in turn pumped back via the circulation line 21 through the inlet 29 into the outer drum 19.
  • Solid constituents that have been filtered out are discharged laterally above the filter screen 48 due to the inclined arrangement of the same and collected in the chamber 42 of the housing 35 of the filter 22.
  • the solid components can also be collected in the collecting container 43 like lint.
  • the first starting part 25 of the circulation line 21 cannot be shut off by any valve in the exemplary embodiment shown. Therefore, constituents floating on the surface 49 of the treatment liquid are constantly conducted through the first initial part 25 of the circulation line 21 to the filter 22.
  • only treatment liquid with heavier constituents contained therein flows through the second initial part 26 of the circulation line 21 as a result of the shut-off and throttle valve 32 associated therewith, if this is desired.
  • the valve 32 can only be opened periodically during washing.
  • the valve 32 can, however, also be constantly open, with only as much treatment liquid being passed through the second starting part 26 to the filter 22 as the filter capacity allows.
  • the Fig. 4 shows the method according to a third mode of operation of the filter 22.
  • the treatment liquid is filtered when the treatment liquid is completely drained from the chamber 15.
  • a bath change that is to say an exchange of the treatment liquid
  • Such a bath change preferably takes place after washing the laundry items in the relevant chamber 15, when the item of laundry is reloaded from the chamber 15 into the next chamber 15 in the treatment direction 13, for example the first chamber 15 of the rinsing zone 18, or to unload the completely washed and rinsed batch of laundry from the conveyor washing machine 10.
  • valve 32 in the second initial part 26 of the circulation line 21 and any valve in the first initial part 25 are preferably completely open.
  • the treatment liquid can then be completely drained from the drum 12 and the outer drum 19 assigned to it.
  • the treatment liquid to be drained is filtered by the filter 22 and then the filtered treatment liquid is passed by the pump 24 through the circulation line 21 with the valve 34 in the outlet line 30 open into the collecting tank 31.
  • the valve 33 in the circulation line 21 following the outlet line 30 in the flow direction of the treatment liquid through the circulation line 21 is then preferably closed.
  • the lower sump 44 in the housing 35 of the filter 22 enables the treatment liquid to be discharged completely from the filter 22 through the drain 46 Collection tank 31 can be pumped. As a result of the complete emptying not only of the outer drum 19, but also of the filter 22, mixing of the treatment liquid from the last washing process with possibly other treatment liquid for the next washing process is avoided.
  • the filter screen 48 is preferably cleaned while the filter 22 is currently not performing any filtering. This takes place from the underside of the filter screen 48 through the cleaning nozzles 47 directed at it for this purpose, fresh water or purified treatment liquid from the collecting tank 31 can be supplied as cleaning liquid.
  • the soiled cleaning liquid that occurs when cleaning the filter screen 48 is discharged below the filter screen 48, that is to say in the lower part 38.
  • the cleaning liquid collects in the sump 44 at the lowest point of the housing 35 of the filter 22 and is completely drained from here through the drain 46 and then disposed of.
  • the cleaning of the filter 22 can also be carried out in order to avoid the operation of the filter 22 according to FIG Fig. 2 destroy or reduce the amount of foam.
  • the method works both in the area of the last chamber 15 of the main wash zone 17 and the last chamber 15 of the rinsing zone 18. If necessary, the same procedure can be followed in the last chamber 15 of the prewash zone 16.
  • the method described above is also suitable for conveyor-type washing machines which have only a prewash zone 16 and a main wash zone 17, but no rinsing zone 18.
  • the invention is not only suitable for conveyor-type washing machines of all types, but also for other washing machines and washing machines for washing or cleaning any other objects, that is, not just items of laundry.

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  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (12)

  1. Procédé de lavage, en particulier de pièces de linge, dans lequel les pièces de linge sont au moins lavées avec un liquide de traitement dans un tambour (12) pouvant être entraîné en rotation, on évacue au besoin le liquide de traitement hors du tambour (12) au moyen d'au moins un tambour extérieur (19) associé à au moins une partie du tambour (12) et on filtre pendant au moins le lavage le liquide de traitement à l'extérieur du tambour (12) et dudit au moins un tambour extérieur (19), caractérisé en ce que l'on filtre au choix ou en alternance hors du liquide de traitement des composants qui sont plus légers ou plus lourds que le liquide de traitement, dans lequel, pour le filtrage de composants plus légers du liquide de traitement, on prélève le liquide de traitement avec les composants plus légers à sa surface hors du tambour extérieur (19) et, pour le filtrage de composants plus lourds du liquide de traitement, on prélève le liquide de traitement avec les composants plus lourds en dessous de la surface du liquide de traitement hors de celui-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on effectue le filtrage en continu pendant au moins une partie de la durée du processus de lavage, de préférence du fait que l'on ne pompe toujours qu'une partie du liquide de traitement successivement dans le circuit à travers ou via un filtre (22).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on ne filtre toujours qu'une partie, de préférence une partie relativement petite, du liquide de traitement.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on soutire en continu à au moins une évacuation (27, 28) un peu de liquide de traitement hors du tambour extérieur respectif (19) et on renvoie ce liquide de traitement immédiatement après le filtrage dans le même tambour extérieur (19).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on conduit du liquide de traitement à évacuer hors d'au moins un tambour extérieur (19), de préférence à la fin du traitement respectif des pièces de linge, à travers ou via le même filtre (22), dans lequel on évacue de préférence le liquide de traitement filtré dans au moins un réservoir de collecte (31).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on filtre le liquide de traitement avec un filtre (22) réalisé en forme de filtre gravitaire et/ou on verse le liquide de traitement en écoulement libre sur le filtre (22) sous l'effet de la gravité.
  7. Dispositif de lavage en particulier de pièces de linge, avec un tambour (12) pouvant être entraîné en rotation et au moins un tambour extérieur fixe (19), qui s'étend au moins sur une partie de la longueur du tambour et auquel une conduite de dérivation (21) avec au moins un filtre (22) est associée, caractérisé en ce que plusieurs évacuations (27, 28) pour le liquide de traitement, dont au moins une partie peuvent être fermées, sont associées à la conduite de dérivation (21), et une évacuation supérieure est disposée dans la région du niveau ou de la surface (49) du liquide de traitement dans le tambour (12) et dans le tambour extérieur (19), tandis qu'une autre évacuation (28) est prévue dans le fond (20) ou dans la région du fond (20) du tambour extérieur respectif (19).
  8. Dispositif selon la revendication 7, caractérisé en ce qu'il est prévu au moins une pompe (24) dans la conduite de dérivation (21), de préférence après ledit au moins un filtre (22), en considérant la direction d'écoulement du liquide de traitement à travers la conduite de dérivation (21).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que la conduite de dérivation (21) est raccordée, de préférence après la pompe (24), à un accès (29), pouvant en particulier être fermé, vers le tambour extérieur respectif (19) pour le renvoi du liquide de traitement filtré dans le même tambour extérieur (19), duquel le liquide de refroidissement a été prélevé pour le filtrage.
  10. Dispositif selon l'une quelconque des revendications 7 à 9, caractérisé en ce que la conduite de dérivation (21) présente une conduite de décharge (30), à laquelle est de préférence associé au moins un réservoir de collecte (31).
  11. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que ledit au moins un filtre (22) est réalisé en forme de filtre gravitaire.
  12. Dispositif selon l'une quelconque des revendications 7 à 11, caractérisé en ce que le tambour (12) est réalisé en forme de tambour cylindrique allongé, avec plusieurs chambres successives (15), dans lequel un tambour extérieur (19) est associé à au moins une des chambres (15).
EP12001271.1A 2011-03-14 2012-02-27 Procédé et dispositif de lavage, en particulier de pièces de linge Active EP2500459B2 (fr)

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US20160053425A1 (en) * 2013-03-20 2016-02-25 Hydrasyst Ip Pty Ltd Water treatment system
CN105793482A (zh) * 2013-12-17 2016-07-20 佩莱若林·米尔诺公司 地毯和载有微粒的材料的洗涤装置及方法
CN107475987A (zh) * 2017-10-10 2017-12-15 无锡市南长实验中学 一种家用洗衣机
CN109505102B (zh) * 2018-11-01 2022-08-09 佛山海尔滚筒洗衣机有限公司 一种带有除泡沫装置的洗衣机

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US3734854A (en) 1971-12-29 1973-05-22 J Altadonna Liquid processing system
NZ223338A (en) * 1987-04-24 1991-01-29 Ecolab Inc Automatic neutralisation of oxidising agent in a laundry bath
CN1145726C (zh) 1998-06-30 2004-04-14 大宇电子有限公司 具有一体设有过滤器的泵的滚筒式洗衣机
US7406843B2 (en) 2002-05-08 2008-08-05 Whirlpool Corporation Remote sump with film heater and auto purge
JP2005043690A (ja) * 2003-07-23 2005-02-17 Fujinon Corp プラスチックレンズの保持方法およびプラスチックレンズの保持構造
US20050183208A1 (en) * 2004-02-20 2005-08-25 The Procter & Gamble Company Dual mode laundry apparatus and method using the same

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