Classifications

• • 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
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/20—Arrangements for water recovery

Definitions

• the invention relates to a water-conducting domestic appliance, in particular a laundry treatment appliance for washing and / or drying laundry. Specifically, the invention relates to the field of washing machines and washer-dryers.
• DE 197 09 085 A1 discloses a method for washing laundry, in which the washing water is collected in an intermediate container, filtered and collected in a memory. Since a cross-flow filter is used as the filter, several cycles are required. In addition, the filter device is arranged parallel to the pumping line, which requires two storage containers. Such a construction is technically complex and requires a lot of space, which generally lacks in a washing machine.
• An object of the invention is to provide an improved water-conducting domestic appliance, which has a reduced water consumption and in which the operability is improved.
• a water-conducting domestic appliance according to the invention in particular a laundry treatment appliance for washing and / or drying
• Laundry in which a treatment area, connected to the treatment area Abpumpstrang, arranged in the Abpumpstrang drain pump, a between the treatment area and the drain pump in the Abpumpstrang arranged filter means and a water storage are provided, wherein stored in the water storage water is feasible in the treatment area and wherein the filter means is connected to the water storage to water from the arranged in the Abpumpstrang filter device in the water reservoir divert.
• the measures listed in the dependent claims advantageous refinements of the water-conducting household appliance according to the invention are possible.
• the filter device is arranged between the treatment area and the drain pump in the pumping line. In this case, it is also advantageous that the filter device is arranged on a suction side of the drain pump. As a result, an advantageous mode of operation of the water-conducting domestic appliance for storing filtered water in the water storage is made possible.
• the water reservoir is used to store a certain amount of water, which is branched off from the arranged in the Abpumpstrang filter device into the water reservoir.
• the water is filtered in an advantageous manner by the filter device, so that filtered water can be obtained from the wastewater discharged via the pumping line.
• the filter device can filter the water more or less.
• the extent of filtering depends on the expected contamination of the wastewater used for filtering and the intended use for the stored water.
• the water-bearing domestic appliance can be configured such that the water branched off into the water reservoir is diverted during a wash cycle, preferably the last wash cycle. The pollution of the wastewater of the last wash cycle is usually relatively low.
• the stored water can be used for a prewash cycle, which is followed by a main wash cycle.
• the requirements for the filter device also depend on the expected service life of the water in the water reservoir.
• the filter device can also be used for filtering bacteria and the like.
• the filter device can be adapted to the particular application.
• the filter device has a filter chamber and a filter arranged in the filter chamber, that the filter branched off into the water reservoir Waste water filters, with residues accumulating in the filter, and that the waste water led to an exit through the pumping line is guided through the filter device in such a way that entrainment of residues collected in the filter by the wastewater is enabled.
• the water branched off into the water reservoir can thereby be guided in an advantageous manner through the filter of the filter device.
• the desired purity of the water stored in the water reservoir can be achieved.
• the filter becomes clogged with residues over time.
• these residues are taken along by the wastewater, which is passed through the pumping line to the outlet.
• the waste water passes through the filter chamber, whereby it flows past the filter, that a cleaning effect is achieved with respect to the filter.
• a maintenance-free design of the filter device or at least a longer service life of the filter can be achieved.
• a user-friendly design of the water-bearing household appliance is possible, whereby the water consumption can be reduced by the stored water.
• the filter is configured as a hollow-fiber membrane filter, that the filter device has a flange, that the water reservoir is at least indirectly connected to the flange and that the two ends of the hollow fibers of the hollow-fiber membrane filter are connected to the flange.
• a high surface in relation to the required volume can be used for filtering. In this case, for example, a bundle with 100 to 1000 fibers bent in a U-shape and the front side can be taken in the flange.
• the wastewater to be filtered is fed into the filter chamber and driven by a pressure difference between the filter chamber and the flange through the pores in the fiber cladding.
• the thereby deposited substances form residues that accumulate on the outside of the surface of the shell of the individual hollow fibers, while the purified water is passed through the cavity of the hollow fibers on the flange to the water reservoir. Due to the very large surface area of the hollow-fiber membrane filter, even at a relatively low pressure, for example at a pressure difference of 50 kPa (0.5 bar), filtration and thus filling of the water reservoir can take place.
• the required pressure difference also depends on the desired cleaning effect.
• the hollow-fiber membrane filter comprises a multiplicity of hollow fibers which are arranged in the filter chamber such that the stream of wastewater guided through the pumping-down strand to the outlet mechanically moves the hollow fibers towards one another.
• the hollow fibers of the hollow-fiber membrane filter are arranged in the filter chamber such that they rub against one another during the mechanical movement caused by the flow of the wastewater.
• the filter device is low-maintenance or even maintenance-free thanks to the automatic transverse flushing. Additional special filter cleaning programs with additional hardware, time and energy overhead are thus not necessarily required.
• the water reservoir is connected via a pump with the filter device.
• the pump can be configured advantageously as a working against the ambient pressure suction pump, since the pressure to be applied when using a hollow fiber membrane filter is relatively low.
• a controller is provided and that the controller for draining water from the arranged in the Abpumpstrang filter device in the water storage shuts off the drain pump and the pump, via which the water storage is connected to the filter device turns on.
• the pump through which the water reservoir with the Filter device is connected designed as a bidirectional pump that the controller in a filter cleaning mode turns off the drain pump and the pump, via which the water storage is connected to the filter device, in the opposite direction to control by backwashing of water from the water storage in the filter chamber of the filter device to assist a filter cleaning of the filter of the filter device.
• the bidirectional suction pump in the printing operation the cleaning effect by backwashing during pumping can be further supported.
• Such a cleaning program can thus be integrated into a normal washing process.
• the filter cleaning can be performed, for example, after a certain number of program runs.
• the system of water storage, filter device and pumps is designed to be compact and robust and can be accommodated, for example, additionally in the bottom area of a designed as a front load water-bearing household appliance together with other, optionally required auxiliary components.
• Fig. 1 shows a water-conducting domestic appliance in a schematic representation according to an embodiment of the invention.
• Fig. 1 shows functional components and assemblies of a water-bearing household appliance 1 in a schematic representation.
• the water-bearing domestic appliance 1 can in particular be configured as a laundry treatment appliance and serve for washing and / or drying laundry.
• the water-bearing domestic appliance 1 can be configured as a washing machine or washer-dryer.
• the features of the water-conducting household appliance 1 specifically explained here are also suitable for other applications, in particular, the domestic appliance can be designed as a dishwasher.
• the water-bearing domestic appliance 1 has a container 2, which is designed in this embodiment as a tub.
• the container 2 encloses a treatment area 3 of the water-conducting domestic appliance 1.
• the water-conducting domestic appliance 1 has a connection 4, to which the water-conducting household appliance 1 can be connected to a fresh water line.
• a line 5, in which a check valve 6 is arranged leads to an induction bowl 7.
• a treatment agent in particular a laundry treatment agent, can be provided.
• the fresh water passes through a free air gap in the dispenser 7 and rinses the laundry treatment agent, in particular a detergent or a softener, from the dispenser 7 via a connecting channel 8 in the container 2.
• the laundry treatment agent in particular a detergent or a softener
• the wastewater can be pumped out of the treatment area 3 via a pumping line 9 by means of a drain pump 10 arranged in the pumping line 9.
• a connection 1 1 is provided, with which the Abpumpstrang 9 of the water-bearing household appliance 1 is connectable to a sewer line.
• fresh water can be fed several times via the line.
• one or more rinses may be provided to rinse the laundry provided in the treatment area 3.
• At least part of the rinsing water can be temporarily stored in a water storage 12 of the water-bearing household appliance 1.
• the water reservoir 12 is connected via a line 13 to the connecting channel 8.
• a pump 14 is arranged.
• the water stored in the water storage 12 may replace a part of the supplied fresh water in another application. This can save water.
• a portion of the supplied via the line 5 fresh water can be replaced by the water stored in the water tank 12.
• the water storage 12 may for example have a storage volume of 12 liters.
• a filter device 20 is arranged in the Abpumpstrang 9 .
• the filter device 20 has a filter chamber 21 and a filter 22 arranged in the filter chamber 21. in this connection is the filter device 20 between the container 2, which surrounds the treatment area 3, and the drain pump 10 in the Abpumpstrang 9 is arranged.
• the filter device 20 may be arranged on a suction side 23 of the drain pump 10. The wastewater guided via the pumping line 9 through the drain pump 10 to the port 11 passes through the filter chamber 21 of the filter device 20. During a wash cycle, relatively clean wastewater is present in the filter chamber 21.
• the water-bearing domestic appliance 1 of this embodiment has a controller 24.
• a pump 25 is provided, via which the filter device 20 is connected to the water reservoir 12.
• the pump 25 is arranged in a line 26 which is connected on the one hand with a flange 27 of the filter device 20 and on the other hand with the water reservoir 12.
• the controller 24 is connected via a control line 28 to the drain pump 10, via a control line 29 to the pump 25 and via a control line 30 to the pump 14.
• the controller 24 operates the drain pump 10.
• the controller 24 switches off the drain pump 10 and actuates the pump 25. This is preferably done after a rinse.
• the filter 22 of the filter device 20 is configured as a hollow fiber membrane filter.
• the filter 22 has a multiplicity of hollow fibers 31, wherein in FIG. 1 only the hollow fiber 31 is marked for the sake of simplicity of illustration.
• each of the hollow fibers 31 is bent in a U-shape, wherein both an end 32 of the hollow fiber 31 and an end 33 of the hollow fiber 31 are gripped in the end face of the flange 27.
• the water passes from the filter chamber 21 into the interior of the hollow fiber 31.
• the filtered water is conveyed through the pump 25 into the water reservoir 12. Due to the large number of hollow fibers 31, a very large surface area of the filter 22 is created in relation to the required volume. As a result, a relatively low delivery pressure of the pump 25 is sufficient.
• the pump 25 may be designed as a suction pump, which applies a pressure of about 50 kPa (0.5 bar) against the ambient pressure.
• the design and arrangement of the filter device 20 enables a cleaning of the filter 22 and thus prevents a progressive clogging of the filter 22. Due to the inherent elasticity of the hollow fibers 31 and thus their mobility, a cleaning of the filter 22, which consists of the plurality of hollow fibers 31, be realized by relatively low mechanical energy input. Due to the arrangement of the filter device 20 in the Abpumpstrang 9, in particular at the given by the suction side 23 inlet of the drain pump 10, the pumped out of the container 2 via the drain pump 10 to the port 11 wastewater flows around the outside (surface) of the hollow fibers 31.
• the filling of the water reservoir 12 takes place relatively late within a washing program, for example during the last rinse cycle.
• the filter chamber 21 to the port 1 1 flowing through wastewater gradually becomes cleaner. This corresponds to the normal course of the wash program that off Prewash, main wash and one or more rinses can exist.
• this flushing of the filter chamber 21 and the filter 22 is flushed through and thus cleaned.
• the degree of purification of the filter 22 also gradually improves.
• the filter 22 is at least largely cleaned during the last rinse. By means of the cleaned filter 22, at least part of the wastewater from the last rinse cycle can thereby be filtered in order to fill the water reservoir 12.
• the standing in the filter chamber 21 wastewater is here deducted from the pump 25 on the flange 27 of the hollow fiber membrane filter 22.
• the configuration of the hollow fibers 31 of the filter 22 is predetermined with respect to the respective application. Specifically, a pore width of the hollow fiber membranes may be selected from a relatively wide range. Specifically, hollow fibers 31 having pores having a pore width of about 6 nm may be selected. By such a pore size and bacteria or the like can be filtered off.
• the filter chamber 21 may be configured as a filter chamber.
• the filter chamber 21 may in this case also be formed by a chamber on the suction side 23 of the drain pump 10, which is formed within the housing of the drain pump 10.
• the water-bearing domestic appliance 1 may also include a filter cleaning mode.
• the pump 25 is designed as a bidirectional pump 25 so that it can pump water from the water reservoir 12 in the filter chamber 21 of the filter device 20 in the opposite direction.
• the controller 24 controls the pump 25 in the opposite direction while the drain pump 10 for draining wastewater via the pumping line 9 to the port (outlet) 11 runs.
• the cleaning of the filter 22 from the residues is in this case supported by the backwashing of water from the water reservoir 12 into the filter chamber 21.
• improved cleaning of the hollow fibers 31 of the filter 22 can occur.
• the cleaning mode can be performed during a program run when pumping. A user intervention or special selection by the user is not required.
• the cleaning mode may be automatically executed by the controller 24 after a certain period of operation or after a certain number of program runs. IC N
• the controller 24 may operate the pump 25 to fill the water reservoir 12 even during the pump down, in which the drain pump 10 is running.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Separation Using Semi-Permeable Membranes (AREA)
• Detail Structures Of Washing Machines And Dryers (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42937292

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (9)

Citations (8)

• 2009
  • 2009-08-07 DE DE102009028357.9A patent/DE102009028357B4/de not_active Expired - Fee Related
• 2010
  • 2010-07-27 EP EP10736724.5A patent/EP2462272B1/de active Active
  • 2010-07-27 EA EA201270243A patent/EA019780B1/ru not_active IP Right Cessation
  • 2010-07-27 WO PCT/EP2010/060833 patent/WO2011015487A1/de active Application Filing
  • 2010-07-27 PL PL10736724T patent/PL2462272T3/pl unknown
  • 2010-07-27 CN CN201080034915.4A patent/CN102471981B/zh active Active

Patent Citations (8)

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