EP2843100B1 - Waschtrockner mit Wasserfilter - Google Patents

Waschtrockner mit Wasserfilter Download PDF

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Publication number
EP2843100B1
EP2843100B1 EP13182333.8A EP13182333A EP2843100B1 EP 2843100 B1 EP2843100 B1 EP 2843100B1 EP 13182333 A EP13182333 A EP 13182333A EP 2843100 B1 EP2843100 B1 EP 2843100B1
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EP
European Patent Office
Prior art keywords
air
drying
washing
amount
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13182333.8A
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English (en)
French (fr)
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EP2843100A1 (de
Inventor
Massimo Viero
Andrea Contarini
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP13182333.8A priority Critical patent/EP2843100B1/de
Priority to AU2014314250A priority patent/AU2014314250A1/en
Priority to PCT/EP2014/068138 priority patent/WO2015028492A1/en
Priority to CN201480047657.1A priority patent/CN105492675B/zh
Publication of EP2843100A1 publication Critical patent/EP2843100A1/de
Application granted granted Critical
Publication of EP2843100B1 publication Critical patent/EP2843100B1/de
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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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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 
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • 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 
    • D06F39/02—Devices for adding soap or other washing agents
    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • 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 solution according to embodiments of the invention generally relates to household and/or professional laundry washing/drying appliances (hereinafter, washer/dryers for the sake of conciseness) operable to perform both washing and drying processes. More particularly, such solution relates to washer/dryers provided with heat pump devices.
  • Each washer/dryer generally comprises a laundry chamber configured for housing a laundry load (including articles such as clothes and other textiles), and a (closed) air circulation system adapted, during a drying process, to circulate drying air through the laundry chamber (so as to allow removal of moisture from the laundry load).
  • a laundry load including articles such as clothes and other textiles
  • a (closed) air circulation system adapted, during a drying process, to circulate drying air through the laundry chamber (so as to allow removal of moisture from the laundry load).
  • each heat pump device substantially makes use of a refrigerant circuit for effectively transferring thermal energy from a first side at a lower temperature (also referred to as cool side), to a second side at a higher temperature (also referred to as hot side).
  • a common type of heat pump device exploits physical properties of a refrigerant fluid (or refrigerant), which is made to flow in the refrigerant circuit, and comprises a compressor, a pressure-lowering device (e.g., an expansion valve), and a heat exchanger assembly - i.e. a first heat exchanger (where the refrigerant absorbs heat) and a second heat exchanger (where the refrigerant releases heat), both of them arranged within the air circulation system.
  • the drying air leaving the laundry chamber with decreased temperature and increased humidity (or dump air) with respect to the incoming hot drying air is passed through the first heat exchanger, where it is further cooled down and dehydrated, and then through the second heat exchanger where, upon reheating, it forms the hot drying air, thereafter the drying air is fed again inside the laundry chamber for evaporating moisture from the laundry load.
  • heat pump-based washer/dryers have being experiencing a certain attractiveness decrease, mainly due to heat pump drawbacks. Indeed, cooling capacity at cool side of the heat pump device could be, or become over time, not high enough to efficiently cool down the dump air, which could result in overheating of the drying air at hot side of the heat pump device. Thus, an undesired overheating of the washer/dryer, and especially of electric/electro-mechanic/electronic components housed therein, is typically experienced, which sets reliability issues.
  • washer/dryers based on other de-moisturizing and heating solutions e.g., those based on air-air heat exchanger/heating resistor assembly, are often preferred, wherein heating and cooling capacities balancing can be achieved by adjusting electric power provided to the heating resistor.
  • the Applicant has recently devised an expedient by which relatively fresh ambient air is allowed to enter the washer/dryer (and the air circulation system) and to mix with the drying air (which allows cooling down thereof), and a certain amount of compensation air is allowed to exit the air circulation system (and to vent outside the washer/dryer) for compensating the ambient air added thereto.
  • Said compensation air is not re-circulated through the laundry chamber but, in fact, exhausted outside the washer/dryer.
  • compensation air is channeled through a washing products dispensing conduit (that, during a washing process in standard washer/dryers, typically allows dispensing washing products into the laundry chamber from a washing products loading tray), and is vented outside the washer/dryer through the loading tray.
  • a washing products dispensing conduit that, during a washing process in standard washer/dryers, typically allows dispensing washing products into the laundry chamber from a washing products loading tray
  • This allows avoiding excessive amount of space (and costs) than other possible compensation air venting approaches (e.g ., provision of a dedicated venting arrangement).
  • EP0870859 discloses a drying system for dryer washing machines, being of the kind of those dryer washing machines that first realize the normal washing cycle and once the centrifugal cycle has finished, it passes to the drying cycle with a load of the 50% of the maximum capacity that is prescribed for the appliance, being the hot air introduced through a tunnel that is endowed of some resistances for the heating of the air that is impelled to it by the ventilator, so that the drying system has a housing for the ventilator, that is connected with the support of the detergent dispenser, remaining the support of the dispenser connected with the lateral lower part of the tank, through a pipe in which the products stored in the dispenser are introduced, as well as the cold water for acting as a heat interchanger with the air, which is saturated of humidity, that is taken out of the tank through the cited pipe.
  • EP1645675 discloses a washing machine.
  • the washing machine includes a detergent box, a housing, and a filter.
  • the detergent box is installed on one side of a main machine and connected to a flowing path of an exhaust duct through which air is exhausted.
  • the housing is detachably installed in the detergent box.
  • the filter is installed in the housing to collect lint while the exhaust air passes through the filter.
  • the Applicant has noticed that the compensation air leaving the laundry chamber, after having dried laundry, and flowing up to the washing product dispensing conduit carries, with it, fluff (such as lint and other residual laundry load fabrics).
  • fluff may be dispersed partly within the washer/dryer and partly outside the washer/dryer, and/or it may accumulate within the loading tray, and mix to the washing products upon loading thereof into the loading tray. This could impair washing process.
  • the laundry washing/drying appliance comprises a laundry chamber for containing laundry to be washed/dried, an air circulation system adapted to cyclically circulate drying air through the laundry chamber during a drying process, and a washing products dispensing conduit adapted to dispense washing products into the laundry chamber during a washing process.
  • An amount of drying air within the laundry chamber is allowed to leave the air circulation system during the drying process.
  • Said washing products dispensing conduit comprises, along at least part thereof, a water well for holding fluff carried with said amount of drying air down.
  • the washing products dispensing conduit comprises a bulged conduit portion adapted to be at least partially filled with a predefined amount of water so as to form said water well.
  • the laundry washing/drying appliance further comprises a control unit configured to cause said predefined amount of water to at least partially fill said bulged conduit portion before starting the drying process.
  • said control unit is further configured to cause restoring of said predefined amount of water within the water well at predefined time intervals during the drying process.
  • said predefined time intervals depend on at least one between temperature of said amount of drying air and duration of the drying process.
  • said control unit is further configured to completely replace said predefined amount of water within the bulged conduit portion so as to allow removal of fluff accumulated therewithin.
  • the laundry washing/drying appliance further comprises a washing products loading tray fluidly connected to the washing products dispensing conduit, said amount of drying air flowing, free from fluff, at least partly into said loading tray and hence venting outside the appliance.
  • the laundry washing/drying appliance further comprises an overflow-preventing system fluidly connected to the laundry chamber for preventing washing products from overflowing out of the appliance, said amount of drying air flowing, free from fluff, at least partly into said overflow-preventing system and hence venting inside the appliance.
  • the laundry washing/drying appliance further comprises an air duct for allowing ambient air to enter the air circulation system and to mix with the drying air thereby avoiding overheating thereof, said amount of drying air leaving the air circulation system substantially compensating the ambient air added thereinto.
  • the laundry washing/drying appliance further comprises first and second heat exchangers of a heat pump device arranged within the air circulation system. Thanks to this arrangement, the drying air leaving the laundry chamber with decreased temperature and increased humidity with respect to the incoming drying air is first passed through the first heat exchanger, where it is cooled down and de-moisturized, and then through the second heat exchanger, where it is heated-up and fed again into the laundry chamber.
  • the laundry washing/drying appliance comprises a laundry chamber for containing laundry to be washed/dried, an air circulation system adapted to cyclically circulate drying air through the laundry chamber during a drying process, a washing products dispensing conduit adapted to dispense washing products into the laundry chamber during a washing process, an amount of drying air within the laundry chamber being allowed to leave the air circulation system during the drying process.
  • the method comprises forming, along at least part of said washing products dispensing conduit, a water well for holding fluff carried with said amount of drying air down.
  • the washing products dispensing conduit comprises a bulged conduit portion, and said forming a water well comprises at least partially filling the bulged conduit portion with a predefined amount of water.
  • said at least partially filling the bulged conduit portion takes place before starting the drying process.
  • the method further comprises restoring said predefined amount of water within the water well at predefined time intervals during the drying process.
  • said predefined time intervals depend on at least one between temperature of said amount of drying air and duration of the drying process.
  • the method further comprises, after the drying process, completely replacing said predefined amount of water within the bulged conduit portion so as to allow removal of fluff accumulated therewithin.
  • fluff dispersion inside and/or outside the washer/dryer and/or fluff accumulation within the loading tray is substantially avoided, or at least drastically reduced.
  • mixing between fluff and washing products is prevented, and optimal washing processes can take place.
  • Figure 1 conceptually shows a cross-sectional view of a washer/dryer 100 according to an embodiment of the invention.
  • the washer/dryer 100 comprises a laundry chamber 105 (i.e., a tub and a rotating drum housed therein, not illustrated) adapted to contain a laundry load to be washed/dried, and an air circulating system adapted to cyclically circulate drying air through the laundry chamber 105 (during a drying process).
  • a laundry chamber 105 i.e., a tub and a rotating drum housed therein, not illustrated
  • an air circulating system adapted to cyclically circulate drying air through the laundry chamber 105 (during a drying process).
  • the air circulating system comprises a delivery duct 110 fluidly connected to an input opening IN 105 of the laundry chamber 105 for feeding it with drying air, and a return duct 115 fluidly connected to a main output opening OUT 105 of the laundry chamber 105 for taking moisture-laden drying air deriving from drying process (dump air).
  • a main duct 120 which houses first HE 1 and second HE 2 heat exchangers (e.g ., evaporator and condenser members, respectively) of a heat pump device, as well as a motor-driven fan 125, e.g . arranged downstream the second heat exchanger HE 2 .
  • first HE 1 and second HE 2 heat exchangers e.g ., evaporator and condenser members, respectively
  • a motor-driven fan 125 e.g . arranged downstream the second heat exchanger HE 2 .
  • the dump air leaving the laundry chamber 105 with decreased temperature and increased humidity with respect to the incoming hot drying air is first passed (through the return duct 115 ) through the first heat exchanger HE 1 , where it is further cooled down and de-moisturized (heat pump cool side).
  • the de-moisturized air is then passed through the second heat exchanger HE 2 (heat pump hot side), where it is heated-up, thereafter the corresponding hot, de-moisturized air (i.e., the drying air), is fed again (through the delivery duct 110 ) into the laundry chamber 105.
  • the second heat exchanger HE 2 heat pump hot side
  • the corresponding hot, de-moisturized air i.e., the drying air
  • a secondary air duct 130 is provided that fluidly connects the air circulation system with the surrounding environment - preferably, as illustrated, with the outside of the washer/dryer 100.
  • the secondary air duct 130 fluidly connects the outside of the washer/dryer 100 with the main duct 120, at a proper input region thereof - preferably, at ( e.g., after, as illustrated) the second heat exchanger HE 2 , so that no ambient air A AIR treatment is required by the heat pump device, thus resulting in low power consumption thereof.
  • different main duct 120 input region arrangements are possible, for example between the first HE 1 and second HE 2 heat exchangers, or at (e.g., before) the first heat exchanger HE 1 .
  • the ambient air A AIR entering the air circulation system mixes with (thereby cooling down) the (drying) air circulating therewithin. This avoids overheating issues.
  • a secondary output opening OUT 105,S of the laundry chamber 105 is provided for allowing a predefined amount of the dump air within it to leave the air circulation system (and to vent outside and/or inside the washer/dryer 100 ), so as to substantially compensate/balance the ambient air A AIR added thereinto.
  • the amounts of drying air allowed to leave the air circulation system hereinafter, compensation air C AIR
  • the amount of ambient air A AIR allowed to enter thereinto should be made substantially equal (e.g., by properly shaping and sizing the secondary air duct 130 and the secondary output opening OUT 105,S one another).
  • venting of the compensation air C AIR takes place by channeling, wherein a venting duct 135 is provided that fluidly connects the secondary output opening OUT 105,S of the laundry chamber 105 to the surrounding environment.
  • the venting duct 135 may be a dedicated duct/path/channel, or it may advantageously comprise (as herein illustrated) a washing products dispensing conduit that, in conventional washer/dryers, allows dispensing washing products from a washing products loading tray 140.
  • a washing products dispensing conduit that, during a washing process, allows feeding the laundry chamber 105 with the washing products, is also used, in the example at issue, to allow the compensation air C AIR to leave the air circulation system (and preferably, to be vented outside the washer/dryer 100 ) during a drying process.
  • Venting of the compensation air C AIR outside the washer/dryer can take place through the loading tray 140, both when, in order to allow washing products loading, it is opened, and when it is closed (as better discussed in the following).
  • the fluff-laden compensation air C AIR leaving the laundry chamber 105 and flowing up to the washing products dispensing conduit 135 may cause fluff to accumulate within, thereby dirtying, the loading tray 140.
  • fluff may mix to washing products and negatively affect washing process.
  • fluff dispersed outside the washer/dryer can dirt the ambient where the washer/dryer is placed.
  • the washing products dispensing conduit 135 comprises, along at least part thereof, a water well 145 for holding fluff carried with the compensation air C AIR down (as will be better discussed in the following).
  • FIG. 1 A practical implementation of the washer/dryer 100 is shown, according to an embodiment of the invention, in the perspective and partly exploded front view of Figure 2A (which will be discussed with joint reference to Figure 1 ).
  • references denoting components of the washer/dryer 100 in their conceptual representation of Figure 1 will also denote the same components in their practical implementation represented from Figure 2A on.
  • the washer/dryer 100 comprises a substantially parallepiped-shaped cabinet 205, having a front panel 205 F , two side panels 205 S (only one visible in the figure), and a bottom panel.
  • the cabinet 205 encloses an inner compartment (not visible) housing the laundry chamber 105 and accessible through an access door 210 (shown in closed configuration).
  • a top panel 205 T closes the cabinet 205 from above, and defines a ready-to-mount worktop incorporating/housing the air circulation system.
  • Figures 2B-2C the latter showing, according to an embodiment of the invention, top and bottom perspective views with partly removed parts, respectively, of the worktop 205 T .
  • the worktop 205 T comprises, at a front thereof, the washing products loading tray 140 (shown in the closed configuration), and a removable filter unit F, preferably arranged on the washing products loading tray 140.
  • the filter unit F is configured to filter the dump air from fluff before being passed through the first HE 1 and second HE 2 heat exchangers.
  • the worktop 205 T comprises a, e.g. a plastic, base element 215 shaped and sized so as to define a number of housing sections adapted to house corresponding components of the air circulation system, and a cover assembly (globally denoted by number reference 220 ) for top covering the base element 215 and delimiting air paths therebetween (as discussed below).
  • a cover assembly (globally denoted by number reference 220 ) for top covering the base element 215 and delimiting air paths therebetween (as discussed below).
  • the base element 215 comprises housing sections 215 F , 215 HE1 , 215 HE2 , for housing the filter unit F, the first heat exchanger HE 1 , and the second heat exchanger HE 2 , respectively.
  • housing sections 215 F , 215 HE1 , 215 HE2 take most of a worktop top surface S TOP , exception made for (left and right) corner regions of the base element 215 (intended to other purposes, as discussed below).
  • a first covering panel 220 1 of cover the assembly 220 covers the base element 215 with the exception of the left corner region thereof - the space between the base element 215 ( i.e., the housing sections 215 HE1 , 215 HE2 ) and the first covering panel 220 1 delimiting an air path that substantially identifies, together with the air path through the filter unit F, the main duct 120.
  • a second covering panel 220 2 is instead provided on the first covering panel 220 1 for aesthetical issues.
  • the base element 215 comprises, e.g . at a substantially central part of the housing section 215 HE2 , a base opening 225, which is fluidly connected to the fan 125 ( e.g ., rigidly fixed to the base element 215, underneath it) and to the delivery duct 110 for allowing the drying air to be fed into the laundry chamber 105.
  • the base opening 225 opens down to a fan 125 input
  • the delivery duct 110 arranged underneath the base element 215 as well, has a first end connector for connection with a fan 125 output, and a second end connector (for example, an elongated-shaped connector, as illustrated) for connection with an opening of a bellow (not shown) that, as usual in washer/dryers, seals gap between the drum and the access door 210.
  • the base element 215 also comprises, e.g . at the left corner region thereof, a further base opening 230, which allows connection of the return duct 115 (carrying the dump air within it) from the output opening OUT 105 of the laundry chamber 105 to the filter unit F.
  • the base opening 230 also allows passage of un-channeled air circulating within the washer/dryer 100 (outside the air circulating system).
  • the dump air leaving the laundry chamber 105 is first fed (through the return duct 115 ) through the filter unit F, and the filtered dump air output therefrom is then passed through the first heat exchanger HE 1 , where it is de-moisturized (with the condensed moisture that is properly collected and drained by a slot grid 235 of the base element 215 on which the first heat exchanger HE 1 rests).
  • the de-moisturized air is then passed through the second heat exchanger HE 2 , where it is heated-up, thereafter such drying air is fed again (through the base opening 225, the fan 125 and the delivery duct 110 ) into the laundry chamber 105 ( i.e., from a front thereof through the bellow opening).
  • the base element 215 comprises ( e.g ., at the right corner thereof) an air passage 240 (preferably, an air grid vertically extending between opposite top S TOP and bottom S BOTTOM surfaces of the base element 215 ) for allowing input of the ambient air A AIR , and (e.g., at the left corner thereof) a further air passage 245, similar to the air passage 240, for allowing un-channeled air within the cabinet 205 (such as further ambient air intended to cool down the compressor heat pump) to be vented outside the washer/dryer 100.
  • an air passage 240 preferably, an air grid vertically extending between opposite top S TOP and bottom S BOTTOM surfaces of the base element 215
  • a further air passage 245 similar to the air passage 240, for allowing un-channeled air within the cabinet 205 (such as further ambient air intended to cool down the compressor heat pump) to be vented outside the washer/dryer 100.
  • the base element 215 further comprises a (preferably, bottleneck) portion 250 fluidly connecting the housing section 215 HE2 (or any other main duct 120 input region, as discussed above) to the air passage 240, so as to allow the ambient air A AIR to be channeled into the air circulation system and to mix with the drying air.
  • a (preferably, bottleneck) portion 250 fluidly connecting the housing section 215 HE2 (or any other main duct 120 input region, as discussed above) to the air passage 240, so as to allow the ambient air A AIR to be channeled into the air circulation system and to mix with the drying air.
  • the air passage, 240, the bottleneck portion 250 and the space between the base element 215 (i.e., the right corner region thereof) and the first covering panel 220 1 identify, as a whole, the secondary air duct 130.
  • the drying air/ambient air A AIR mixture is fed to the laundry chamber 105, thereafter a predefined amount thereof (compensation air C AIR ) is allowed to flow into the loading tray 140 (free from fluff, thanks to the water well 145 provided along the washing products dispensing conduit 135 ) and hence vented outside the washer/dryer 100 (as discussed herebelow).
  • the compensation air C AIR leaving the laundry chamber 105 and flowing, through the washing products dispensing conduit 135, up to the loading tray 140 is vented through interstices of the loading tray 140 (not distinguishable) allowing opening/closing movements thereof.
  • compensation air C AIR venting is further achieved by means of an overflow-preventing system typically provided in washer/dryers for preventing liquids (e.g ., washing products and/or water) from overflowing out of the washer/dryer 100, for example through the loading tray 140, upon a fault occurrence (e.g., water pump closure fail).
  • the overflow-preventing system per se well known in the art, comprises a draining channel 155 (part of which visible in Figure 2C ), preferably arranged at a side of the loading tray 140 and at predefined height.
  • the liquids When, as a result of a fault, the liquids, rising up within the laundry chamber 105, reach the loading tray 140, they reach a limit level (given by said predefined height), and the exceeding liquids are drained (through the draining channel 155 ) to a proper liquid vessel (not shown) arranged within the washer/dryer 100, where a liquid detection system (also not shown) is provided.
  • a liquid detection system also not shown
  • the liquid detection system completely stops washer/dryer 100 operation, thereby preventing liquids from overflowing out of the washer/dryer 100 via the loading tray 140 and from causing flooding of the user premises where the washer/dryer 100 is placed.
  • the compensation air C AIR (or a part thereof) can flow (free from fluff, thanks to the water well 145 ) through the overflow-preventing system 155, and vent inside the washer/dryer 100 .
  • the washing products dispensing conduit 135 preferably comprises a bulged conduit portion 260 adapted to be at least partially filled with a predefined amount of water so as to form said water well 145 (in this respect, see also Figure 2D , the latter showing a perspective, enlarged view of a part of the washing products dispensing conduit 135 ).
  • the washing products dispensing conduit 135 comprises a first end opening 135 1 with associated a first manifold adapted to be connected to the secondary output opening OUT 105,S of the laundry chamber 105, and a second end opening 135 2 with associated a second manifold adapted to be coupled to the washing products loading tray 140 (e.g., by means of a straight conduit portion, visible in Figure 2C ).
  • the washing products dispensing conduit 135 is shaped such as the first 135 1 second 135 2 end openings are sufficiently above a water well maximum level ML (substantially given by bulged conduit portion 260 specific geometry) to avoid water overflowing from the water well 145 during the drying process.
  • ML substantially given by bulged conduit portion 260 specific geometry
  • control unit CU of the washer/dryer 100 is configured to manage water well 145 as well.
  • control unit CU is configured to cause a predefined amount of water to fill (until the water well maximum level), or at least partially fill, said bulged conduit portion 260 before starting the drying process.
  • control unit CU may be also configured to cause periodic restoring of (the predefined amount of water of) the water well 145 during the drying process, preferably at predefined time intervals.
  • Such predefined time intervals may be pre-set (e.g., by the washer/dryer 100 manufacturer) or dynamically set (for example, by a suitable logic of the control unit CU ) according to expected and/or detected compensation air C AIR temperature and/or drying process duration - indeed, compensation air C AIR temperature and/or drying process duration determine evaporation speed of the water well 145.
  • control unit CU may also be configured to completely replace said predefined amount of water within the bulged conduit portion 260, so that removal of fluff accumulated therewithin is allowed.
  • replacing of the predefined amount of water can be achieved by means of controlled water injections into the washing products dispensing conduit 135 - just as for common washing processes.
  • any component thereof may be separated into several elements, or two or more components may be combined into a single element; in addition, each component may be replicated for supporting the execution of the corresponding operations in parallel. It should also be noted that any interaction between different components generally does not need to be continuous (unless otherwise indicated), and it may be both direct and indirect through one or more intermediaries.
  • the solution according to an embodiment of the invention lends itself to be implemented through an equivalent method (by using similar steps, removing some non-essential steps, or adding additional optional steps); moreover, the steps may be performed in a different order, in parallel or overlapped (at least in part).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Claims (15)

  1. Waschtrockner (100), umfassend:
    eine Wäschekammer (105) zur Aufnahme der zu waschenden/trocknenden Wäsche,
    ein Luftzirkulierungssystem (110 - 120), das geeignet ist, Trocknungsluft während eines Trockenvorgangs zyklisch durch die Wäschekammer (105) zu zirkulieren,
    eine Waschprodukteabgabeleitung (135), die geeignet ist, während eines Waschvorgangs Waschprodukte in die Wäschekammer (105) abzugeben, wobei eine Trocknungsluftmenge (CLUFT) in der Wäschekammer (105) während des Trockenvorgangs das Luftzirkulierungssystem verlassen darf, und
    einen Luftkanal (130), um zu gestatten, dass Umgebungsluft (ALUFT) in das Luftzirkulierungssystem (110 - 120) eintritt und sich mit der Trocknungsluft vermischt, wodurch deren Überhitzung vermieden wird, wobei die das Luftzirkulierungssystem (110 - 120) verlassende Menge an Trocknungsluft (CLUFT) die dort hinzugefügte Umgebungsluft (ALUFT) im Wesentlichen ausgleicht,
    dadurch gekennzeichnet, dass
    die Waschprodukteabgabeleitung (135) entlang mindestens eines Teils davon eine Wasserquelle (145) umfasst, wobei die Wasserquelle (145) durch eine vordefinierte Wassermenge gebildet ist, so dass von der Menge an Trocknungsluft (CLUFT) getragene Flusen durch das Wasser der Wasserquelle (145) niedergehalten werden, wenn die Menge an Trocknungsluft (CLUFT) über der Wasserquelle (145) strömt und über eine Oberfläche davon streicht.
  2. Waschtrockner (100) nach Anspruch 1, wobei die Waschprodukteabgabeleitung (135) einen ausgebauchten Leitungsabschnitt (260) umfasst, der geeignet ist, mindestens teilweise mit der vordefinierten Wassermenge gefüllt zu sein, um die Wasserquelle (145) zu bilden.
  3. Waschtrockner (100) nach Anspruch 2, ferner umfassend eine Steuereinheit (CU), die dazu konfiguriert ist zu veranlassen, dass die vorbestimmte Wassermenge den ausgebauchten Leitungsabschnitt (260) vor Beginn des Trockenvorgangs mindestens teilweise füllt.
  4. Waschtrockner (100) nach Anspruch 3, wobei die Steuereinheit (CU) ferner dazu konfiguriert ist, zu vordefinierten Zeitintervallen während des Trockenvorgangs die Wiederherstellung der vordefinierten Wassermenge in der Wasserquelle (145) zu veranlassen.
  5. Waschtrockner (100) nach Anspruch 4, wobei die vordefinierten Zeitintervalle von Temperatur der Menge an Trocknungsluft (CLUFT) und/oder Dauer des Trockenvorgangs abhängig sind.
  6. Waschtrockner (100) nach einem der Ansprüche 3 bis 5, wobei die Steuereinheit (CU) ferner dazu konfiguriert ist, die vordefinierte Wassermenge in dem ausgebauchten Leitungsabschnitt (260) nach dem Trockenvorgang vollständig zu ersetzen, um die Entfernung von Flusen, die sich darin angesammelt haben, zu gestatten.
  7. Waschtrockner (100) nach einem der vorhergehenden Ansprüche, ferner umfassend eine Schale (140) zum Laden von Waschprodukten, die fluidisch mit der Waschprodukteabgabeleitung (135) verbunden ist, wobei die Menge an Trocknungsluft (CLUFT) von Flusen befreit mindestens teilweise in die Ladeschale (140) strömt und somit außerhalb des Waschtrockners (100) entlüftet.
  8. Waschtrockner (100) nach einem der vorhergehenden Ansprüche, ferner umfassend ein Überlaufverhinderungssystem (155), das fluidisch mit der Wäschekammer (105) verbunden ist, um zu verhindern, dass Waschprodukte aus dem Waschtrockner (100) überlaufen, wobei die Menge an Trocknungsluft (CLUFT) von Flusen befreit mindestens teilweise in das Überlaufverhinderungssystem (155) strömt und somit innerhalb des Waschtrockners (100) entlüftet.
  9. Waschtrockner (100) nach einem der vorhergehenden Ansprüche, ferner umfassend einen ersten (HE1) und einen zweiten (HE2) Wärmetauscher einer in dem Luftzirkulierungssystem (110 - 120) angeordneten Wärmepumpenvorrichtung.
  10. Verfahren zum Betreiben eines Waschtrockners (100), wobei das Verfahren Folgendes umfasst:
    zyklisches Zirkulieren von Trocknungsluft durch ein Luftzirkulierungssystem (110 - 120) des Waschtrockners (100) während eines Trockenvorgangs davon,
    Abgeben von Waschprodukten durch eine Waschprodukteabgabeleitung (135) des Waschtrockners (100) während eines Waschvorgangs davon, wobei es einer Menge an Trocknungsluft (CLUFT) während des Trockenvorgangs gestattet wird, das Luftzirkulierungssystem durch die Waschprodukteabgabeleitung (135) zu verlassen,
    Gestatten, dass Umgebungsluft (ALUFT) in das Luftzirkulierungssystem (110 - 120) eintritt und sich mit der Trocknungsluft vermischt, wodurch deren Überhitzung vermieden wird, wobei die das Luftzirkulierungssystem (110 - 120) verlassende Menge an Trocknungsluft (CLUFT) die dort hinzugefügte Umgebungsluft (ALUFT) im Wesentlichen ausgleicht,
    dadurch gekennzeichnet, dass es ferner folgenden Schritt umfasst:
    Bilden einer Wasserquelle (145) entlang mindestens eines Teils der Waschprodukteabgabeleitung (135), wobei die Wasserquelle (145) durch eine vordefinierte Wassermenge gebildet wird, so dass von der Menge an Trocknungsluft (CLUFT) getragene Flusen durch das Wasser der Wasserquelle (145) niedergehalten werden, wenn die Menge an Trocknungsluft (CLUFT) über der Wasserquelle (145) strömt und über eine Oberfläche davon streicht.
  11. Verfahren nach Anspruch 10, wobei das Bilden einer Wasserquelle (145) das mindestens teilweise Füllen eines ausgebauchten Leitungsabschnitts (260) der Waschprodukteabgabeleitung (135) mit der vordefinierten Wassermenge umfasst.
  12. Verfahren nach Anspruch 11, wobei das mindestens teilweise Füllen des ausgebauchten Leitungsabschnitts (260) vor dem Beginn des Trockenvorgangs erfolgt.
  13. Verfahren nach Anspruch 12, ferner umfassend Wiederherstellen der vordefinierten Wassermenge in der Wasserquelle (145) zu vordefinierten Zeitintervallen während des Trockenvorgangs.
  14. Verfahren nach Anspruch 13, wobei die vordefinierten Zeitintervalle von Temperatur der Menge an Trocknungsluft (CLUFT) und/oder Dauer des Trockenvorgangs abhängig sind.
  15. Verfahren nach einem der Ansprüche 12 bis 14, ferner umfassend vollständiges Ersetzen der vordefinierten Wassermenge in dem ausgebauchten Leitungsabschnitt (260) nach dem Trockenvorgang, um die Entfernung der Flusen, die sich darin angesammelt haben, zu gestatten.
EP13182333.8A 2013-08-30 2013-08-30 Waschtrockner mit Wasserfilter Active EP2843100B1 (de)

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EP13182333.8A EP2843100B1 (de) 2013-08-30 2013-08-30 Waschtrockner mit Wasserfilter
AU2014314250A AU2014314250A1 (en) 2013-08-30 2014-08-27 Laundry appliance having a water filter
PCT/EP2014/068138 WO2015028492A1 (en) 2013-08-30 2014-08-27 Laundry appliance having a water filter
CN201480047657.1A CN105492675B (zh) 2013-08-30 2014-08-27 具有水过滤器的洗衣设备

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EP3943656A4 (de) * 2019-03-27 2022-05-11 Wuxi Little Swan Electric Co., Ltd. Wäschebehandlungsvorrichtung
EP4174228A4 (de) * 2020-06-30 2023-11-29 Qingdao Haier Drum Washing Machine Co., Ltd. Integrierte wasch- und trocknungsvorrichtung

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WO2015028492A1 (en) 2015-03-05
CN105492675B (zh) 2017-12-26
AU2014314250A1 (en) 2016-03-10
CN105492675A (zh) 2016-04-13

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