EP2935684B1 - Wasch- und trocknungsmaschine - Google Patents

Wasch- und trocknungsmaschine Download PDF

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Publication number
EP2935684B1
EP2935684B1 EP13805373.1A EP13805373A EP2935684B1 EP 2935684 B1 EP2935684 B1 EP 2935684B1 EP 13805373 A EP13805373 A EP 13805373A EP 2935684 B1 EP2935684 B1 EP 2935684B1
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EP
European Patent Office
Prior art keywords
heat exchanger
air
refrigerant
circuit
chamber
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.)
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Application number
EP13805373.1A
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English (en)
French (fr)
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EP2935684A1 (de
Inventor
Francesco Cavarretta
Maurizio Del Pos
Daniele Favaro
Massimiliano Vignocchi
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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Publication date
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Priority to EP13805373.1A priority Critical patent/EP2935684B1/de
Publication of EP2935684A1 publication Critical patent/EP2935684A1/de
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/72—Control of the energy or water consumption
    • 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 
    • D06F58/206—Heat pump 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat pumps

Definitions

  • the present invention relates to a washer-dryer machine for washing and drying goods.
  • washing cycles are performed, wherein goods are washed and rinsed in a chamber, and drying cycles are performed wherein the goods in the chamber are dried.
  • US 2010/0107703 discloses a drum-type washer-dryer provided with a heat pump for drying laundry.
  • the washer-dryer comprises a water tub with a warm air inlet and a warm air outlet and an airflow duct communicating the warm air inlet and the warm air outlet.
  • the heat pump comprises an evaporator and a condenser and a compressor.
  • the air is re-circulated inside the water tub through the airflow duct by means of a blower.
  • the vapour contained in the air supplied to the airflow duct from the water tub is cooled and dehumidified by the evaporator.
  • the dehumidified air is heated by the condenser and subsequently supplied into the water tub as warm air.
  • EP 1 983 094 A1 discloses a washer-dryer machine comprising a chamber for receiving goods, a air circuit configured to circulate air through the chamber and a heat pump system comprising a condenser, an evaporator and a compressor that form a refrigerant circuit configured to circulate a refrigerant; the machine further comprises a third heat exchanger arranged outside the air circuit and selectively provided in series with the evaporator during an initial stage of the drying cycle, configured to quicken the rinse in temperature of the evaporator.
  • a washer-dryer machine comprising a chamber for receiving goods, an air circuit for circulating air inside the chamber and a heat pump system comprising: a compressor, a first heat exchanger for heating the air that flows into the chamber and a second heat exchanger for dehumidifying and cooling the air that comes from the chamber, during a drying cycle of the machine.
  • the heat pump system further comprises a third heat exchanger placed outside said air circuit and configured to be used in cooperation with said compressor and said first heat exchanger, bypassing the second heat exchanger, for heating the air that flows into the chamber during a washing cycle of the machine.
  • the Applicant found that executing the washing cycles of the machine by exploiting the air circulation circuit and part of the heat pump elements used for executing the drying cycles (that is the first heat exchanger and the compressor) enables the washer-dryer machine to perform the washing and drying cycles with reduced power consumption, limited size and simplified structure. This is advantageous in terms of costs, design and construction of the machine.
  • the use -during a washing cycle of the machine- of a third heat exchanger which is placed outside the air circuit and within a second refrigerant circuit that bypasses the second heat exchanger, prevents the air flowing towards the chamber from being cooled and dehumidified either by the second heat exchanger or by the third heat exchanger during washing cycles of the machine wherein goods have to be wetted and not dried.
  • the second heat exchanger is inactive during the washing cycle. Therefore, even if it is thermally coupled with the air circuit, it is inert on (that is, it does not exchange heat with) the air re-circulating in the air circuit.
  • the third heat exchanger even if active during the washing cycle, it is outside the air circuit so that it is inert too on the air re-circulating in the air circuit.
  • the present invention relates to a washer-dryer machine comprising:
  • washing cycle is used to indicate a cycle of a washing program of the washer-dryer machine, including a washing cycle, a pre-washing cycle and a rinsing cycle.
  • heated air circulating through the chamber increases the temperature inside the chamber.
  • the goods in the chamber preferably wetted by water optionally mixed with washing/rinsing products, are suitably heated up.
  • drying cycle is used to indicate a cycle of a drying program of the washer-dryer machine.
  • good in the chamber are suitably dried by means of dehumidified and heated air injection into the chamber.
  • the washer-dryer machine comprises a control unit configured to operate the switching element so that said refrigerant is circulated within the first refrigerant circuit, during the drying cycle of the washer-dryer machine, and within the second refrigerant circuit, during the washing cycle of the washer-dryer machine.
  • the switching element is arranged downstream of the first heat exchanger and upstream of the second heat exchanger and the third heat exchanger.
  • upstream and downstream are used in relation to the direction of the refrigerant flow inside the first refrigerant circuit and the second refrigerant circuit.
  • the switching element comprises a three-ways valve.
  • the heat pump system comprises a pressure lowering device upstream of the second heat exchanger and the third heat exchanger.
  • the pressure lowering device is downstream of the first heat exchanger.
  • the pressure lowering device can comprise an expansion valve or another expansion element, such as a capillary tube.
  • the switching element itself is configured to provide said pressure lowering device.
  • the pressure lowering device When the pressure lowering device is arranged upstream of the switching element or at the switching element, the pressure lowering device can be shared between the first refrigerant circuit and the second refrigerant circuit.
  • the machine When the pressure lowering device is arranged downstream of the switching element, the machine preferably comprises two pressure lowering devices respectively arranged in the first refrigerant circuit upstream of the second heat exchanger and in the second refrigerant circuit upstream of the third heat exchanger.
  • the first heat exchanger is thermally coupled with the air circuit.
  • the first heat exchanger is placed within the air circuit.
  • the second heat exchanger is thermally coupled with the air circuit.
  • the second heat exchanger is placed within the air circuit.
  • the chamber is positioned downstream of the first heat exchanger and upstream of the second heat exchanger, in relation to the direction of the air flow inside the air circuit.
  • the third heat exchanger is arranged outside the air circuit so as to avoid heat exchange with the air circulating along the air circuit towards the chamber.
  • the chamber comprises an air inlet for air supply into the chamber and an air outlet for air exit from the chamber.
  • the air circuit comprises at least one duct fluidly connecting the air inlet and the air outlet of the chamber.
  • the first heat exchanger and the second heat exchanger are placed within said at least one duct.
  • the air circuit comprises a fan operable for propelling the air through said air circuit.
  • the fan is configured to propel air into the chamber, from the chamber towards the second heat exchanger, from the second heat exchanger towards the first heat exchanger and from the first heat exchanger back again into the chamber.
  • the washer-dryer machine comprises a cabinet having a top.
  • the first heat exchanger and the second heat exchanger are arranged in an upper part of the cabinet, between the chamber and a top wall of the top.
  • the top of the cabinet is configured to match and close from above the cabinet.
  • the top is preferably formed as a ready-to-mount part ready to be mounted onto the cabinet.
  • the top of the cabinet comprises, integrally formed therein, at least part of the air circuit, and seats configured to house the first heat exchanger and the second heat exchanger.
  • this embodiment advantageously enables to improve the machine assembly.
  • the air circuit comprises at least one duct integrally formed in the top.
  • the top of the cabinet also comprises, integrally formed therein, a seat configured to house the switching element.
  • the third heat exchanger is arranged within the bottom of the cabinet.
  • the compressor is arranged within the bottom of the cabinet.
  • the machine comprises a tank adapted to contain a fluid.
  • the third heat exchanger is preferably configured to cool the fluid contained in the tank.
  • the third heat exchanger is advantageously thermally coupled to the tank.
  • the third heat exchanger can be arranged within the tank.
  • said tank is arranged within the bottom of the cabinet.
  • the tank is a closed tank. According to another embodiment, the tank is fluidly connected to the chamber and/or to water mains.
  • the tank is fluidly connected to water mains by means of a conduit configured to supply tap water from the water mains to the tank bypassing the chamber.
  • the first heat exchanger is a tubes and fins heat exchanger.
  • the second heat exchanger is a tubes and fins heat exchanger.
  • the third heat exchanger is a tube-in-tube heat exchanger or a plate heat exchanger or similar.
  • the refrigerant is adapted to condense inside the first heat exchanger and to evaporate inside the second heat exchanger.
  • the first heat exchanger is a condenser and the second heat exchanger is an evaporator.
  • the refrigerant is adapted to evaporate inside the third heat exchanger.
  • the third heat exchanger is an evaporator.
  • the refrigerant can operate nonconventional cycles, as for instance in the case of carbon dioxide, that do not undergo a phase change (i.e., condensation and evaporation).
  • said first refrigerant circuit and said second refrigerant circuit are closed recirculation circuits.
  • the washer-dryer machine comprises a water inlet circuit adapted to supply water, that can be optionally mixed with washing/rinsing products (i.e. detergents, softeners, etc.), into the chamber.
  • the water inlet circuit can comprise a detergent drawer and water inlet pipes.
  • the top of the cabinet comprises, integrally formed therein, at least part of the water inlet pipes.
  • the top of the cabinet comprises, integrally formed therein, a seat configured to house the detergent drawer.
  • the washer-dryer machine comprises a water outlet circuit for discharging waste water (i.e. used water) from the chamber.
  • the water outlet circuit is advantageously fluidly connected to the bottom of the chamber.
  • the water outlet circuit can comprise a draining pump and draining pipes, adapted for discharging waste water from the chamber after process cycles (e.g. washing, rinsing cycles).
  • the fluid in the tank, thermally coupled with the third heat exchanger is cooled down with respect to a starting temperature and, optionally, at least partially iced.
  • the cooled/iced fluid needs to be regenerated, that is warmed up again towards the starting temperature, in order to be used again for a next, optionally immediately subsequent, washing cycle.
  • the tank is thermally coupled to the water outlet circuit (e.g. to said draining pump and/or to said draining pipes). This enables to transfer heat from the waste water flowing through the water outlet circuit to the fluid contained in the tank thereby improving regeneration of the cooled/iced fluid in the tank.
  • the thermal coupling between the tank and the water outlet circuit can be achieved, for example, by means of a heat exchanger, as for example by placing the draining pipes in contact with the tank.
  • the tank is configured to drain away at least part of cooled fluid from the tank.
  • control unit is configured to manage fluid regeneration in the tank by managing entry of tap water from the water mains and/or from the chamber and exit of at least part of the fluid cooled by the third heat exchanger.
  • the tank is fluidly connected to the water outlet circuit in order to drain away at least part of cooled fluid from the tank via the water outlet circuit.
  • the tank is fluidly connected to a dedicated fluid outlet circuit (that is to a fluid outlet circuit free of fluid connection with the water outlet circuit).
  • control unit is configured to operate the heat pump system so that the fluid in the tank is at least partially freezed. In this way, the latent heat of the phase transition from liquid to solid is advantageously used and the heat pump system efficiency is improved.
  • the washer-dryer machine can be a dish washer with drying functionality or a laundry washer-dryer machine.
  • the present invention relates to a method of operating a washer-dryer machine comprising a chamber for receiving goods, an air circuit, a heat pump system comprising: a first heat exchanger, a second heat exchanger and a compressor, which form a first refrigerant circuit with a refrigerant, and a third heat exchanger, arranged outside the air circuit, forming with the first heat exchanger and the compressor a second refrigerant circuit for said refrigerant, the method comprising:
  • the third heat exchanger cools a fluid in a tank.
  • the tank is thermally coupled to the third heat exchanger.
  • the method further comprises supplying water into the chamber.
  • the air circulating through the chamber, heated by the first heat exchanger, increases the temperature inside the chamber.
  • the goods e.g. the laundry
  • the goods e.g. the laundry
  • the water supplied into the chamber are heated up.
  • the method further comprises regenerating the fluid contained in the tank, cooled by the third heat exchanger during the washing cycle.
  • Regeneration of the fluid contained in the tank can be performed by supplying to the tank tap water from water mains, preferably bypassing the chamber, and/or by supplying to the tank process water from the chamber.
  • regenerating the fluid contained in the tank comprises draining away at least part of the cooled fluid from the tank.
  • the air is re-circulated in said air circuit in sequence through the chamber, the second heat exchanger, the first heat exchanger and back through the chamber.
  • the refrigerant is caused to circulate along the first refrigerant circuit in sequence through the first heat exchanger, through the switching element, through the second heat exchanger and through the compressor.
  • the refrigerant is caused to circulate along the second refrigerant circuit in sequence through the first heat exchanger, through the switching element, through the third heat exchanger and through the compressor.
  • the air is circulated and the compressor is operated till the goods in the chamber are suitably dried or till the temperature in the chamber reaches a predetermined value or for a predetermined operation time. Thereafter, the air circulation is stopped (e.g., the fan is switched off) and the compressor is switched off.
  • the air is circulated and the compressor is operated till the temperature in the chamber reaches a predetermined value, or till the fluid in the tank reaches a predetermined condition (for example a predetermined degree of ice formation in the tank), or for a predetermined operation time. Thereafter, the air circulation is stopped (e.g., the fan is switched off) and the compressor is switched off.
  • the air is circulated again along said air circuit (e.g., the fan is switched on again) and the compressor is operated (that is, switched-on) again when another washing cycle or drying cycle has to be performed.
  • the method further comprises performing at least one laundry spinning cycle.
  • Figure 1 shows a washer-dryer machine 1 according to an embodiment of the invention.
  • the washer-dryer machine 1 is configured to wash goods in a washing phase and to dry goods in a drying phase.
  • the drying phase can be executed after a washing phase or alone.
  • washing/drying phases are suitably performed according to washing/drying programs, selectable by a user, wherein the goods are pre-washed/washed/rinsed with water and possible washing/rinsing products, according to one or more washing cycles, and at least in part dried, according to one or more drying cycles.
  • the washer-dryer machine 1 comprises a chamber 10 for treating goods.
  • the washer-dryer machine 1 can be a dish washer with drying functionality or a laundry washer-dryer.
  • the chamber 10 can be a drum, optionally perforated, which is rotatably contained in a tub 11 (shown only in figures 6 and 7 ).
  • the washer-dryer machine 1 comprises a control unit 60 configured to control operation of the same.
  • the washer-dryer machine 1 comprises a water outlet circuit 50 for discharging waste water (i.e. used water optionally mixed with washing/rinsing products) from the chamber 10 after washing (e.g., pre-washing, washing, rinsing) cycles.
  • waste water i.e. used water optionally mixed with washing/rinsing products
  • the water outlet circuit 50 can comprise a draining pump 51 and draining pipes 52.
  • the water outlet circuit 50 is advantageously fluidly connected to the bottom of the chamber 10.
  • the washer-dryer machine 1 also comprises a water inlet circuit 70 adapted to supply water, that can be optionally mixed with washing/rinsing products, into the chamber 10.
  • the water inlet circuit 70 advantageously comprises a detergent drawer 72 and water inlet pipes 74.
  • the water inlet pipes 74 fluidly connect water mains 40 to the chamber 10 via the detergent drawer 72.
  • the detergent drawer 72 is adapted to be filled with washing/rinsing products, for example detersives, softener, bleaching, sparkling/rinse aid substances, etc.
  • the detergent drawer 72 can comprise one or more compartments (not shown) for one or more products from which a certain amount of these products, depending on the washing program, is delivered into the chamber 10.
  • the washer-dryer machine 1 also comprises a heat pump system 20, a tank 30 adapted to contain a fluid and an air circuit 90.
  • the air circuit 90 comprises a fan 92, a fan motor 96 (shown only in figure 7 ), air ducts 94 connecting an air inlet 91 and an air outlet 93 of the chamber 10 and an air filter 95.
  • the heat pump system 20 comprises a first heat exchanger 22, a switching element 23, a second heat exchanger 24, a third heat exchanger 25 and a compressor 26.
  • the first heat exchanger 22 and the second heat exchanger 24 are arranged within the air circuit 90.
  • the third heat exchanger 25 is arranged outside the air circuit 90. In this way, it does not exchange heat with the air circulating in the air circuit 90.
  • the air filter 95 is positioned downstream of the chamber 10 and upstream of the second heat exchanger 24, in relation to the direction of the air flow inside the air circuit 90.
  • the third heat exchanger 25 is suitably thermally coupled to the tank 30.
  • the third heat exchanger 25 comprises a pipe (or a series of pipes) properly shaped and immersed in the fluid contained in the tank 30.
  • the fluid contained in the tank 30 preferably comprises water.
  • the fan 92 is configured to re-circulate air along the air circuit 90, in sequence through the chamber 10, the second heat exchanger 24, the first heat exchanger 22, the fan 92 itself and back into the chamber 10.
  • the first heat exchanger 22 and the second heat exchanger 24 are air-refrigerant heat exchangers for example of the type tubes and fins.
  • the third heat exchanger 25 is a fluid-refrigerant heat exchanger and can be a tube-in-tube heat exchanger, a plate heat exchanger or similar.
  • the first heat exchanger 22, the switching element 23, the second heat exchanger 24 and the compressor 26 form a first closed refrigerant circuit 27 configured to circulate a refrigerant therein.
  • the first heat exchanger 22, the switching element 23, the third heat exchanger 25 and the compressor 26 form a second closed refrigerant circuit 28 configured to circulate said refrigerant therein and to bypass the second heat exchanger 24.
  • the switching element 23 is configured to selectively switch the flow of the refrigerant into the first refrigerant circuit 27 or into the second refrigerant circuit 28.
  • the first heat exchanger 22 is configured to cool the refrigerant by releasing heat to the air circulating in the air circuit 90, which is flowing towards the chamber 10.
  • the second heat exchanger is configured to heat the refrigerant by absorbing heat from (that is, cooling and dehumidifying) the air circulating in the air circuit 90, which is coming from the chamber 10 and flowing towards the first heat exchanger 22.
  • the third heat exchanger 25 is configured to heat the refrigerant by absorbing heat from (that is, cooling) the fluid contained in the tank 30.
  • the refrigerant is adapted to condense inside the first heat exchanger 22 and to evaporate inside the second heat exchanger 24 and the third heat exchanger 25.
  • the first heat exchanger 22 is a condenser and the second heat exchanger 24 and the third heat exchanger 25 are evaporators.
  • the heat pump system 20 that is, when the compressor 26 is switched-on
  • liquefaction of the refrigerant takes place at the condenser (first heat exchanger 22) accompanied by release of heat that is used to heat the air flowing towards the chamber 10.
  • evaporation of the refrigerant takes place at the evaporator (second heat exchanger 24 or third heat exchanger 25) accompanied by absorption of heat that is used to dehumidify and cool the air coming from the chamber 10 (in case of the second heat exchanger 24) or to cool the fluid in the tank 30 (in case of the third heat exchanger 25).
  • the heat pump system 20 can comprise a pressure lowering device (e.g. an expansion valve or other expansion element) downstream of the first heat exchanger 22 and upstream of the second heat exchanger 24 and the third heat exchanger 25.
  • a pressure lowering device e.g. an expansion valve or other expansion element downstream of the first heat exchanger 22 and upstream of the second heat exchanger 24 and the third heat exchanger 25.
  • a single pressure lowering device can be used for both the first refrigerant circuit 27 and the second refrigerant circuit 28.
  • two pressure lowering devices are preferably used, one arranged in the first refrigerant circuit 27 upstream of the second heat exchanger 24 and the other one arranged in the second refrigerant circuit 28 upstream of the third heat exchanger 25.
  • a conventional electrical heater (not shown) may be comprised in the washer-dryer machine 1 as well.
  • the conventional electrical heater can be suitably positioned on the bottom of the chamber 10.
  • a conventional electrical heater (not shown), different from the one optionally present for the washing cycles, may be comprised in the washer-dryer machine 1.
  • the conventional electrical heater for the drying cycles can be suitably positioned on the air circuit 90 downstream of the first heat exchanger 22 and upstream of the chamber 10, in relation to the direction of the air flow inside the air circuit.
  • the tank 30 is fluidly connected by means of a tap water conduit 31 to public water mains 40 in order to be able to directly receive tap water from it.
  • said tap water conduit 31 is configured to supply tap water from the water mains 40 to the tank 30 bypassing the chamber 10 (that is without making the tap water to pass through the chamber 10). In this way, cooled/iced fluid regeneration in the tank 30 can be performed with clean tap water, avoiding the risk of contamination with deposits and/or bacteria from waste water from the chamber 10.
  • the tank 30 can be thermally coupled to the water outlet circuit 50 in order to transfer heat from waste water flowing through the pipes 52 into the fluid contained in the tank 30.
  • thermal coupling can be achieved by placing the draining pipes 52 in contact with the tank 30.
  • the tank 30 can be thermally coupled to electronic components and heated elements inside the machine (not shown, as for example compressor, motor, inside air).
  • the thermal energy released by these components can be transferred to the fluid in the tank 30 for example by natural convection, forced convection or conduction.
  • the tank 30 has an output fluidly connected to the water outlet circuit 50 in order to drain away cooled fluid from the tank 30 via the water outlet circuit 50.
  • the tank output and the water outlet circuit 50 are suitably connected through pipe(s) 34.
  • the fluid in the tank 30 can be moved by a pump or impeller (not shown) in order to increase the heat transfer coefficient.
  • the control unit 60 is advantageously configured to operate the heat pump system 20 and the fan 92 of the air circuit 90 any time the washer-dryer machine 1 is turned on in order to perform a predetermined washing and/or drying program.
  • FIG. 2 schematically shows the washer-dryer machine 1 during a washing cycle (e.g., pre-washing, washing, rinsing, and similar cycle) of a predetermined washing program.
  • a washing cycle e.g., pre-washing, washing, rinsing, and similar cycle
  • water optionally mixed with washing/rinsing products, is suitably supplied into the chamber 10 by means of the water inlet circuit 70.
  • the control unit 60 pilots the switching element 23 so that the flow of the refrigerant is switched into the second refrigerant circuit 28, bypassing the second heat exchanger 24.
  • This situation is schematically represented in figure 2 by using a cross on the second heat exchanger 24 and by using dotted lines for representing the part of the first refrigerant circuit 27 which is bypassed.
  • control unit 60 switches the fan 92 and the heat pump system 20 (that is the compressor 26) on.
  • the fan 92 re-circulates air along the air circuit 90, in sequence through the chamber 10, the air filter 95, the second heat exchanger 24, the first heat exchanger 22, the fan 92 itself and back into the chamber 10.
  • the refrigerant is re-circulated along the second refrigerant circuit 28, in sequence through the first heat exchanger 22, the switching element 23, the third heat exchanger 25 and the compressor 26, bypassing the second heat exchanger 24.
  • the air circulating along the air circuit 90 is heated by the first heat exchanger 22 so that warm air is injected into the wet goods contained in the chamber 10, preferably wetted by the water supplied by the water inlet circuit 70. In this way the temperature inside the chamber increases and the wet goods are heated up.
  • the fan 92 and the heat pump system 20 are switched off by the control unit 60 when the temperature in the chamber 10 reaches a desired value, when the fluid in the tank 30 reaches a predetermined condition (for example, when it is in large part iced) or after a predetermined operation time.
  • control unit 60 can be advantageously configured to operate the heat pump system 20 so that the fluid in the tank 30 is at least partially freezed.
  • the fluid contained in the tank 30, cooled by the third heat exchanger 25, is regenerated.
  • regeneration of the fluid contained in the tank 30 is performed by supplying to the tank 30 tap water from water mains 40, bypassing the chamber 10.
  • regenerating the fluid contained in the tank 30 also comprises draining away from the tank 30 at least part of the cooled fluid through pipes 34 and 52.
  • the second heat exchanger 24 is inactive during the washing cycle. Therefore, even if it is placed within the air circuit 90, it is inert on (that is, it does not exchange heat with) the air re-circulating in the air circuit 90.
  • the third heat exchanger 25 even if active during the washing cycle, it is outside the air circuit 90 so that it is inert too on (that is, it does not exchange heat with) the air re-circulating in the air circuit 90.
  • Figure 3 schematically shows the washer-dryer machine 1 during a drying cycle of a predetermined drying program.
  • the control unit 60 pilots the switching element 23 so that the flow of the refrigerant is switched into the first refrigerant circuit 27, bypassing the third heat exchanger 25.
  • This situation is schematically represented in figure 3 by using a cross on the third heat exchanger 25 and by using dotted lines for representing the part of the second refrigerant circuit 28 which is bypassed.
  • control unit 60 switches the fan 92 and the heat pump system 20 (that is the compressor 26) on.
  • the fan 92 causes the air to re-circulate along the air circuit 90, in sequence through the chamber 10, the air filter 95, the second heat exchanger 24, the first heat exchanger 22, the fan 92 itself and back into the chamber 10.
  • the refrigerant is re-circulated along the first refrigerant circuit 27, in sequence through the first heat exchanger 22, the switching element 23, the second heat exchanger 24 and the compressor 26.
  • the air circulating along the air circuit 90 is heated by the first heat exchanger 22 so that warm air is injected into wet goods contained in the chamber 10.
  • the second heat exchanger 24 is active on the air circulating in the air circuit 90 so that moisture-laden air coming from the chamber 10 is cooled and dehumidified by the second heat exchanger 24.
  • the wet goods in the chamber 10 are thus efficiently dried by means of warm dried air injected into the chamber 10.
  • the fan 92 and the heat pump system 20 are operated till the goods in the chamber 10 are sufficiently dried or when the temperature in the chamber 10 reaches a desired value or according to a predetermined operation time. Then, the fan 92 and the heat pump system 20 are suitably switched off by the control unit 60.
  • the washing cycles and the drying cycles are performed by sharing the air circuit 90 and part of the components (that is, the compressor 26 and the first heat exchanger 22) of the heat pump system 20.
  • This advantageously enables to bound, in the machine, the space taken by the components necessary for performing the washing and drying functions and to limit the machine encumbrance.
  • the sharing of the air circuit 90, the compressor 26 and the first heat exchanger 22 between the washing cycles and the drying cycles enables to limit the changes required to adapt the already existing design of the dryer machine in order to house the additional components (that is, the tank 30, the switching element 23 and the third heat exchanger 25), which are necessary for performing also the washing function.
  • FIGs 4 and 5 schematically show an arrangement of the components of the heat pump system 20, air circuit 90 and water inlet circuit 70 inside a cabinet 2 of the washer-drier machine 1, according to an embodiment of the invention.
  • FIGs 4 and 5 schematically show an arrangement of the components of the heat pump system 20, air circuit 90 and water inlet circuit 70 inside a cabinet 2 of the washer-drier machine 1, according to an embodiment of the invention.
  • other components of the washer-dryer machine 1 are not depicted in figures 4 and 5 .
  • Figures 6 and 7 show two different perspective views of an exemplary washer-dryer laundry machine according to the embodiment of figures 4 and 5 .
  • the cabinet 2 comprises a top 3 and a bottom 4.
  • the top 3 is configured to match and close from the above the cabinet 2.
  • the top 3 is formed as a ready-to-mount part ready to be mounted to the cabinet 2.
  • the top 3 comprises at least part of the components of the machine that perform the drying and washing functions.
  • Such components comprise at least part of the air circuit 90 (that is, the fan 92, the fan motor 96, the air filter 95 and part of the air ducts 94), the first heat exchanger 22 and the second heat exchanger 24.
  • part of the air ducts 94 are integrally formed in the top 3.
  • the air filter 95, the first heat exchanger 22 and the second heat exchanger 24 are preferably housed in seats integrally formed in the top 3.
  • top 3 can also comprise, integrally formed therein, at least part of the water inlet pipes 74 and a seat configured to house the detergent drawer 72.
  • the switching element 23 is shown outside the top 3. However, according to a variant, it can be housed in a seat integrally formed in the top 3.
  • the embodiment of figures 4-7 enables to house at least part of the components of the heat pump system 20, air circuit 90 and air inlet circuit 70 by optimazing the machine design and improving the machine assembly.
  • this embodiment enables to adapt the already existing design of the dryer machine by housing the additional components (that is, the tank 30and the third heat exchanger 25, which are necessary for performing also the washing function) in the bottom 4 of the cabinet 2.
  • the additional components that is, the tank 30and the third heat exchanger 25, which are necessary for performing also the washing function
  • the components of the machine are integrally formed into the top 3, such components can be simply assembled by matching and closing the top 3 onto the cabinet 2.

Landscapes

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

Claims (15)

  1. Wasch- und Trocknungsmaschine (1), umfassend:
    - eine Kammer (10) zur Aufnahme von Wäsche,
    - einen Luftkreislauf (90), der konfiguriert ist, um Luft durch die Kammer (10) umzuwälzen,
    - ein Wärmepumpensystem (20), das einen ersten Wärmetauscher (22), einen zweiten Wärmetauscher (24) und einen Verdichter (26) umfasst, die einen ersten Kühlmittelkreislauf (27) bilden, der konfiguriert ist, um ein Kühlmittel umzuwälzen, wobei der erste Wärmetauscher (22) konfiguriert ist, um das Kühlmittel zu kühlen und die Luft im Luftkreislauf (90) zu erwärmen, wobei der zweite Wärmetauscher (24) konfiguriert ist, um das Kühlmittel zu erwärmen und die Luft im Kreislauf zu entfeuchten,
    wobei das Wärmepumpensystem (20) auch umfasst:
    - einen dritten Wärmetauscher (25), der außerhalb des Luftkreislaufs (90) angeordnet ist,
    dadurch gekennzeichnet, dass der dritte Wärmetauscher (25) mit dem ersten Wärmetauscher (22) und dem Verdichter (26) einen zweiten Kühlmittelkreislauf (28) bildet, der konfiguriert ist, um das Kühlmittel umzuwälzen, wobei der zweite Wärmetauscher (24) im Bypass umgangen wird, wobei der dritte Wärmetauscher (25) konfiguriert ist, um das Kühlmittel zu erwärmen, und
    - ein Schaltelement (23), das konfiguriert ist, um das Kühlmittel wahlweise während eines Trocknungszyklus der Wasch- und Trocknungsmaschine (1) hinein in den ersten Kühlmittelkreislauf (27) und während eines Waschzyklus der Wasch- und Trocknungsmaschine (1) hinein in den zweiten Kühlmittelkreislauf (28) umzuwälzen, wobei die Luft im Luftkreislauf (90) vom ersten Wärmetauscher (22) erwärmt wird.
  2. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, die weiterhin einen Behälter (30) umfasst, der ausgebildet ist, um ein Fluid zu enthalten, wobei der dritte Wärmetauscher (25) konfiguriert ist, um das im Behälter (30) enthaltene Fluid zu kühlen.
  3. Wasch- und Trocknungsmaschine (1) nach Anspruch 2, bei der der Behälter (30) mit dem Wassernetz (40) mittels einer Leitung (31) fluidisch verbunden ist, die konfiguriert ist, um Leitungswasser aus dem Wassernetz (40) unter Umgehung der Kammer (10) zum Behälter (30) zu fördern.
  4. Wasch- und Trocknungsmaschine (1) nach Anspruch 3, die eine Kontrolleinheit (60) umfasst, die konfiguriert ist, um eine Fluidregenerierung im Behälter (30) durch Kontrollieren des Eintritts von Leitungswasser aus dem Wassernetz (40) sowie des Austritts von mindestens einem Teil des durch den dritten Wärmetauscher (25) gekühlten Fluids zu überwachen.
  5. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, bei der das Wärmepumpensystem (20) eine Druckminderungsvorrichtung stromaufwärts vor dem zweiten Wärmetauscher (24) und dem dritten Wärmetauscher (25) umfasst.
  6. Wasch- und Trocknungsmaschine (1) nach Anspruch 5, bei der sich die Druckminderungsvorrichtung stromabwärts hinter dem ersten Wärmetauscher (22) befindet.
  7. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, die weiterhin einen Schrank (2) mit einem Oberteil (3) mit einer Oberwand umfasst, wobei der erste Wärmetauscher (22) und der zweite Wärmetauscher (24) innerhalb des Schranks (2) zwischen der Kammer (10) und der Oberwand angeordnet sind.
  8. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, die weiterhin einen Schrank (2) und ein Oberteil (3) umfasst, wobei das Oberteil (3) konfiguriert ist, um den Schrank (2) in dazu passender Ausführung von oben zu verschließen, und wobei das Oberteil als ein montagefertiges Teil ausgebildet ist, das sich leicht am Schrank (2) montieren lässt, wobei das Oberteil (3), in einer integral ausgebildeten Ausführung, mindestens einen Teil des Luftkreislaufs (90) umfasst und konfiguriert ist, um darin den ersten Wärmetauscher (22) und den zweiten Wärmetauscher (24) unterzubringen.
  9. Wasch- und Trocknungsmaschine (1) nach Anspruch 8, bei der der Luftkreislauf (90) mindestens einen integral im Oberteil (3) ausgebildeten Kanal (94) umfasst.
  10. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, bei der der Luftkreislauf (90) mindestens einen Kanal (94) umfasst, der einen Lufteinlass (91) und einen Luftauslass (93) der Kammer (10) fluidisch verbindet.
  11. Wasch- und Trocknungsmaschine (1) nach Anspruch 1, bei der der Luftkreislauf (90) einen Lüfter (92) umfasst, der dazu dient, die Luft durch den Luftkreislauf (90) zu treiben.
  12. Wasch- und Trocknungsmaschine (1) nach Anspruch 11, bei der der Lüfter (92) konfiguriert ist, um Luft in die Kammer (10), von der Kammer (10) hin zum zweiten Wärmetauscher (24), vom zweiten Wärmetauscher (24) hin zum ersten Wärmetauscher (22) und vom ersten Wärmetauscher (22) zurück in die Kammer (10) zu treiben.
  13. Verfahren zum Betreiben einer Wasch- und Trocknungsmaschine (1), die umfasst: eine Kammer (10) zur Aufnahme von Wäsche; einen Luftkreislauf (90); ein Wärmepumpensystem (20), umfassend: einen ersten Wärmetauscher (22), einen zweiten Wärmetauscher (24) und einen Verdichter (26), die einen ersten Kühlmittelkreislauf (27) mit einem Kühlmittel bilden, sowie einen dritten Wärmetauscher (25), der außerhalb des Luftkreislaufs (90) angeordnet ist und mit dem ersten Wärmetauscher (22) und dem Verdichter (26) einen zweiten Kühlmittelkreislauf (28) für das Kühlmittel bildet; wobei das Verfahren umfasst:
    während eines Trocknungszyklus:
    - Umwälzen von Luft durch die Kammer (10) entlang dem Luftkreislauf (90);
    - Einleiten des Kühlmittels in den ersten Kühlmittelkreislauf (27) und Betreiben des Verdichters (26), so dass das Kühlmittel durch den ersten Kühlmittelkreislauf (27) umgewälzt wird, der erste Wärmetauscher (22) das Kühlmittel kühlt und die Luft im Luftkreislauf (90), die in die Kammer (10) einströmt, erwärmt, und so dass der zweite Wärmetauscher (24) das Kühlmittel erwärmt und die Luft im Luftkreislauf (90), die aus der Kammer (10) kommt, entfeuchtet;
    während eines Waschzyklus:
    - Umwälzen von Luft durch die Kammer (10) entlang dem Luftkreislauf (90);
    - Einleiten des Kühlmittels in den zweiten Kühlmittelkreislauf (28) unter Umgehung des zweiten Wärmetauschers (24) und Betreiben des Verdichters (26), so dass das Kühlmittel durch den zweiten Kühlmittelkreislauf (28) umgewälzt wird und der erste Wärmetauscher (22) das Kühlmittel kühlt und die Luft im Luftkreislauf (90), die in die Kammer (10) einströmt, erwärmt und der dritte Wärmetauscher (25) das Kühlmittel erwärmt.
  14. Verfahren nach Anspruch 13, bei dem, während des Waschzyklus und während des Betreibens des Verdichters (26), der dritte Wärmetauscher (25) ein in einem Behälter (30) enthaltenes Fluid kühlt.
  15. Verfahren nach Anspruch 14, das das Regenerieren des im Behälter (30) enthaltenen Fluids, gekühlt durch den dritten Wärmetauscher (25), umfasst, indem dem Behälter (30) Leitungswasser aus dem Wassernetz (40) unter Umgehung der Kammer (10) zugeleitet wird.
EP13805373.1A 2012-12-18 2013-12-13 Wasch- und trocknungsmaschine Active EP2935684B1 (de)

Priority Applications (1)

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EP12197887.8A EP2746454A1 (de) 2012-12-18 2012-12-18 Wasch- und Trocknungsmaschine
EP13805373.1A EP2935684B1 (de) 2012-12-18 2013-12-13 Wasch- und trocknungsmaschine
PCT/EP2013/076595 WO2014095658A1 (en) 2012-12-18 2013-12-13 Washer-dryer machine

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KR101613965B1 (ko) 2014-12-08 2016-04-20 엘지전자 주식회사 배기식 의류 건조기의 제어방법
DE102015208766A1 (de) * 2015-05-12 2016-11-17 BSH Hausgeräte GmbH Waschtrockner und Verfahren zum Betreiben eines Waschtrockners
US10178937B2 (en) 2015-07-31 2019-01-15 Illinois Tool Works Inc. Warewasher with heat recovery system
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WO2014095658A1 (en) 2014-06-26
PL2935684T3 (pl) 2017-09-29
EP2746454A1 (de) 2014-06-25
EP2935684A1 (de) 2015-10-28
AU2013363832A1 (en) 2015-07-02

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