EP2497856A1 - Maschine zum Trocknen von Wäsche für die Anwendung im Haushalt - Google Patents

Maschine zum Trocknen von Wäsche für die Anwendung im Haushalt Download PDF

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Publication number
EP2497856A1
EP2497856A1 EP11194402A EP11194402A EP2497856A1 EP 2497856 A1 EP2497856 A1 EP 2497856A1 EP 11194402 A EP11194402 A EP 11194402A EP 11194402 A EP11194402 A EP 11194402A EP 2497856 A1 EP2497856 A1 EP 2497856A1
Authority
EP
European Patent Office
Prior art keywords
program
air
operating
forced flow
heat exchanger
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.)
Granted
Application number
EP11194402A
Other languages
English (en)
French (fr)
Other versions
EP2497856B1 (de
Inventor
Giovanni Bombardieri
Sandra Marinozzi
Luciano Luciani
Nicola Colucci
Giuseppina Pia Potena
Aldo Liberatore
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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Publication date
Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Publication of EP2497856A1 publication Critical patent/EP2497856A1/de
Application granted granted Critical
Publication of EP2497856B1 publication Critical patent/EP2497856B1/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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • 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
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2103/40—Opening or locking status of doors
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a laundry-drier machine.
  • Laundry-drier machines are typically provided with a cabinet, rotatably housed within which is a drum, designed to contain the laundry to be dried.
  • the drum has a perforated cylindrical wall and is rotatably mounted within a tank: this is typically the case of the so-called washer-drier machines, i.e., machines that enable washing and subsequent drying of a load of laundry.
  • Drier machines in a strict sense instead, are not normally provided with a tank.
  • the drum is constituted by a non-perforated cylindrical wall, associated to which are a front flange and a rear flange, provided with openings for passage of a flow of drying air.
  • the drum basically consists of just the cylindrical wall, the open ends of which are rotatably constrained to respective front and rear containment elements, with interposition of suitable sliding seal means.
  • the machine has a ventilation system, for generating and conveying a forced flow of air, and heating means, for heating the air of the forced flow.
  • the ventilation system typically comprises a ducting, associated to which are a fan and the means for heating the air.
  • the heating means comprise at least one electrical resistance, but in recent times - mainly for reasons of energy efficiency - there has been a widespread use of heat pumps.
  • Heat-pump machines envisage two substantially closed circuits: the first circuit is the circuit for the forced air, which is passed over the garments, whilst the second circuit is the circuit for the coolant, which passes into a compressor set between an evaporator and a condenser.
  • the temperature of the coolant increases following upon the compression undergone by means of the compressor.
  • the coolant is then made to pass into a condenser, where it transfers heat to the flow of forced air, which is thus heated.
  • the coolant passes first into an expansion valve, which expands and cools the fluid, and then into the evaporator, to return again to the compressor.
  • the condenser performs the same function of heating of the flow of air as the one performed by the electrical resistance in the other known solutions.
  • the fan forces the air into the drum, via a delivery branch of the ventilation circuit after the air itself has been heated via heating means.
  • the hot air traverses the inside of the drum and collects the moisture yielded by the laundry items contained therein, said items being thus progressively dried.
  • the moist air exits from the drum through its front wall, which is provided with a central opening, used - in the case of front-loading machines - also for loading and unloading the laundry.
  • the front opening of the drum is in fluid communication with the intake branch of the ventilation system, upstream of the fan, along which there is a condenser device designed to extract the moisture from the air taken in from the drum, said dehumidified air being then re-heated and re-introduced into the drum via the delivery branch of the system.
  • the corresponding evaporator is directly exploited to bring about condensation of the moisture of the air of the forced flow.
  • the water resulting from condensation is collected in a suitable container, from which, via a pump, it is brought into a container accessible by the user, for corresponding manual emptying.
  • the operating programs that can be executed on the machine according to the known art are used for drying the items of laundry and, possibly, for reducing bad smells or creasing of the laundry. These programs generally have a relatively long duration, of roughly between 30 and 210 minutes.
  • the temperature of the air is in general comprised between 55°C and 65°C.
  • an operating program is aimed at execution of a cycle of treatment of laundry items and is made up of a predetermined automatic sequence of operating steps, which, executed by a control logic, cause passage from a start-of-cycle state to an end-of-cycle state.
  • a control logic executes a control logic to determine the actions of control during execution of the cycle.
  • Start of a program generally occurs following upon a command imparted by a user, for example by means of a start button. Starting from the start-of-cycle state the aforesaid predetermined automatic sequence of operating steps is carried out.
  • the end of the program is determined by reaching of a certain predetermined condition associated to the program itself, detected by the control system of the machine.
  • Said predetermined condition is typically represented by reaching of a predetermined program time, or of a temperature of the drying air or of a certain rate of humidity of the air or moisture of the load of laundry. Passage of the predetermined program time can be measured by the control unit of the machine, typically provided with an internal clock of its own, whilst the temperature and/or humidity can be detected via suitable sensor means belonging to the control system.
  • Laundry-drier machines are also usually provided with a sensor for opening/closing the door of the machine.
  • a sensor for opening/closing the door of the machine.
  • the program is interrupted or paused.
  • the program restarts from the current state at the moment when it was paused, typically by pressing the start button.
  • drying process entails rotation of the drum of the machine at a relatively low speed (roughly comprised between 45 and 55 r.p.m.), and this causes during running of the program the drum not to have to be blocked in the closed condition, unlike what occurs in the course of a washing program, where the speed of rotation of the drum can reach high values, even higher than 1000 r.p.m.
  • the object of the present invention is basically to provide, in a simple and inexpensive way, a laundry-drier machine having functions additional to the traditional ones, for the benefit of the user.
  • references to "an embodiment” or “one embodiment” in the context of the present description is intended to indicate that a particular configuration, structure, or characteristic described in relation to the embodiment is comprised in at least one embodiment.
  • phrases such as “in an embodiment” or “in one embodiment” and the like, that may be present in various points of the present description do not necessarily all refer to one and the same embodiment.
  • the particular configurations, structures, or characteristics can be combined in any adequate way in one or more embodiments.
  • the references used in what follows are merely provided for convenience and do not define the sphere of protection or the scope of the embodiments.
  • the word " end " when referred to an operating program or cycle of the machine, indicates a condition in which all the operating steps envisaged by the program for the purposes of achieving the specific objective of the program itself have been executed, this corresponding to a predetermined condition being reached by a monitored quantity, such as time elapsed and/or moisture content of the garments or humidity of the air and/or temperature of the air.
  • a laundry-drier machine designated as a whole by 1 is a laundry-drier machine according to the present invention.
  • the machine 1 is a drier machine, namely, a machine designed to perform only drying functions, of the condensation type.
  • the machine 1 has a load-bearing structure or cabinet 2, rotatably mounted within which is a drum 3, designed for containing the laundry.
  • the drum 3 has a generally cylindrical shape and is mounted for rotating about a substantially horizontal axis of rotation.
  • means, of a type in itself known, for rotatably supporting the drum 3, which can, for example, be of a rolling type, such as wheels or rollers, or of a sliding type, such as runners.
  • the cabinet 2 has a front face, comprising a front wall 2a, having an opening - not indicated - on which a door 4 is mounted for enabling access to the inside of the drum 3.
  • a control panel or user interface of the machine is provided, designated as a whole by 5.
  • the panel 5 forms part of a control system of the machine, which includes a control unit 6, preferably of an electronic microcontroller type, prearranged for controlling execution of a plurality of operating programs of the machine.
  • the panel 5 comprises at least one ON/OFF button, designated by ON, means for selection and start of one from a plurality of operating programs and, preferably, display means.
  • the aforesaid selection and starting means comprise a rotary selector S with a number of positions and a program-start button R, but other means can obviously be used for the purpose, such as a series of pushbuttons or a selector with linear slider with a number of positions.
  • the display means comprise a display D, which in possible variant embodiments can be replaced by warning lights.
  • signaling means for example, represented by a buzzer, designated by B. It should be noted that a warning means of an acoustic type can be installed in another position, also inside the cabinet 2, and hence not necessarily on the control panel 5.
  • the machine 1 comprises ventilation means, designed for generating a forced flow of air, and heating means, designed for heating the air of the forced flow.
  • the ventilation means include a substantially closed path for the air (not indicated), defined in a known way within the cabinet 2, and possibly comprising a hollow part of the door 4.
  • the aforesaid path substantially extends between an opening of the front wall of the drum 3 and at least one opening of the rear wall of the drum 3.
  • the white arrows designated by F indicate the forced flow along the aforesaid path and through the drum 3.
  • the ventilation means further comprise a fan 7 that is operative along the aforesaid path and that is preferably - but not necessarily - driven by the same motor 8 that is to bring about rotation of the drum 3.
  • a filter 9, of a conception in itself known, is preferably provided, which can be inspected by the user of the machine 1.
  • the means for heating the air include a heat pump 10, which operates along the path for the air and comprises a first heat exchanger 11, a second heat exchanger 12, and a compressor 13, which is operatively set between the two heat exchangers 11 and 12.
  • the heat pump 10 can possibly include a respective filter for the air.
  • the heat exchangers can be of any type known in the sector, for example ones comprising a coil for a working fluid of the heat pump, in particular a coolant, where the compressor and the heat exchangers are connected in a closed circuit for said fluid.
  • the path of the air is such that the flow F will be forced to traverse, or in any case lap, the heat exchangers 11 and 12, for providing a heat exchange with the coolant of the heat pump 10.
  • a tray for collecting the water produced by condensation of the moisture present in the air of the forced flow F at output from the drum 3.
  • a pump 14a which, via a duct 15, takes the condensation water from the tray 14 to a removable container 16, positioned in the top part of the machine 1.
  • an overflow duct to the container 16 there can be associated an overflow duct, not represented, in communication with the tray 14 itself.
  • the machine 1 comprises change-over means, designated as a whole by 20 in Figures 1 and 3 , which can be controlled by the control unit 6 for assuming a first operating condition and a second operating condition, in which the heat pump 10 causes heating and cooling, respectively, of the air of the forced flow F.
  • the control unit 6 is provided for controlling the change-over means 20 in order to assume the aforesaid second operating condition following upon selection of at least one of the operating programs, which can be selected via the selection means S.
  • the heat pump 10 is a reversible heat pump, configured in such a way that:
  • the ventilation means of the machine are provided for obtaining a unidirectional forced flow in such a way that, in both of the operating conditions of the change-over means 20, the forced flow F of air to be heated or cooled, after leaving the drum 3, passes first through the heat exchanger 11, irrespective of whether the latter at the moment operates as condenser or as evaporator, and subsequently through the heat exchanger 12.
  • the change-over means 20 include valve means of the heat pump 10, which preferably comprise a four-way switchable valve 21.
  • valve 21 In its first switching condition (visible in Figure 4 ), the valve 21 is operative for directing the frigorific fluid of the heat pump 10 from the heat exchanger 11 to the compressor 13, and from the compressor 13 to the heat exchanger 12.
  • the heat exchanger 11 operates as evaporator, and is cold, whilst the heat exchanger 12 operates as condenser, and is hot.
  • the flow of air F leaving the drum 3 reaches the heat exchanger 11, where condensation of the corresponding moisture is produced, and then reaches the heat exchanger 12, for being heated.
  • the condensation water is collected in the tray 14.
  • valve 21 In its second switching condition (visible in Figure 5 ), the valve 21 is instead operative for directing the frigorific fluid of the heat pump 10 from the heat exchanger 12 to the compressor 13, and from the compressor 13 to the heat exchanger 11.
  • the heat pump 10 envisages a line of return of the frigorific fluid between the two exchangers 11 and 12, along which a reduction of pressure of the frigorific fluid must take place.
  • said line comprises a capillary duct, represented schematically by the block 22, within which the reduction of pressure occurs by lamination of the flow.
  • the valve 21 is in the condition of Figure 5 , and the control system of the machine controls the heat pump 10 for sending and maintaining the air of the forced flow F at a substantially predetermined temperature, preferably between 5°C and 12°C, for example approximately 10°C. In this way, it is possible to cool items of laundry contained in the drum 3 that are already dry.
  • the program in question can thus be used to refresh dry garments, for example in order to render them pleasant to wear, for example in the summer, once they have been taken out of the drum 3.
  • the same program, or a similar refreshing program can be provided for abating the concentration of acari in certain garments or smells of a load of laundry.
  • the operating programs which can be selected via the selection means S, comprise treatment programs that terminate when at least one condition arises, which can be detected by the control system of the machine.
  • the condition or conditions that determine the end of one of said programs may comprise program time and/or temperature of the air of the forced flow and/or rate of humidity of the air of the forced flow or of moisture of the items of laundry.
  • Expiry of the program time can be conveniently measured by the control unit 6, the microcontroller of which is equipped with an internal clock of its own, whilst the temperature of the air and the moisture of the garments can be detected by the unit 6 via purposely provided sensor means of a type in itself known, represented by the blocks 25a and 25b of Figure 1 , which form part of the control system.
  • the moisture of the items of laundry is measured by means of a sensor 25b, for example a conductivity sensor, which operates directly inside the drum so as to come into contact with the garments themselves.
  • the operating programs of the machine comprise at least one program, the end of which is determined by a condition of the door 4. Consequently, for said purpose, the control unit 6 is programmed to bring about the end of said further program following upon the detection of the condition of the door 4 made via sensor means, designated in Figure 1 with 26.
  • the sensor means 26 can, for example comprise, a microswitch, which can switch between a state of closing and a state of opening, which are obtained when the door is closed or open, respectively.
  • the operating program can, for example, be the refreshing program referred to above.
  • the user can set the dry garment or garments to be refreshed in the drum 3, close the door 4 and, after turning the machine 1 on and selecting the program via the selector S, start the program itself by pressing the pushbutton R.
  • the control unit 6 thus governs the motor 8 in order to bring about rotation of the drum 3 and start of the fan 7, as well as of the heat pump 10, with switching of the valve 21 into the position of Figure 5 .
  • the load of the drum 3 is then progressively cooled, until a predetermined temperature is reached, for example approximately 10°C, which can be detected via the sensor means 25a.
  • the unit 6 controls the heat pump 10 so as to cause, once again with the aid of the sensor 25a, a substantial maintenance of the predetermined temperature. According to a further feature of the invention, the predetermined temperature is then maintained up to end of the program.
  • the control system (possibly with pre-set delay time) supplies a warning to the user, for example an indication of an acoustic or visual type.
  • a warning for example an indication of an acoustic or visual type.
  • the machine 1 can be provided with suitable signaling means, represented in the example of Figure 2 by a buzzer B.
  • a signalling of a visual type is possible, exploiting the display D or other suitable warning means, for example, of a luminous type.
  • the user thus informed that the program temperature has reached, and consequently that the load has been refreshed, can open the door 4 of the machine when desired, thus determining the end of the program itself, and take out the load.
  • the warning may, for example, be of a continuous or intermittent type.
  • verification of the state of the door 4 that causes the end of the program is activated by the control unit 6 only after the predetermined temperature has been reached.
  • the user has the possibility of suspending the program temporarily by opening the door 4 (for example, for adding one or more garments to be refreshed).
  • the program resumes execution, proceeding from the current state at the moment of opening of the door.
  • only opening of the door 4 after a predetermined temperature has been reached causes ending of the program.
  • the program proceeds, after start of warning for the user, if the door 4 is not opened, with the control unit 6 that governs the heat pump 10 so as to maintain the predetermined temperature of the flow F.
  • the control logic can be configured for terminating the program when a predetermined maximum period of time elapses (for example, measured to starting from start of the program, or from reaching of the predetermined temperature, or from start of the warning for the user). Until expiry of the aforesaid period, in any case, the heat pump 10 and the fan 7 remain operative for maintaining the predetermined temperature of the flow F.
  • the operating program the end of which depends upon the condition of the door 4 may also be a program different from the aforesaid refreshing program, such as for example a program for warming dry laundry, which can also be selected via the means S and can be started by pressing the pushbutton R of the user interface 5.
  • a program for warming dry laundry which can also be selected via the means S and can be started by pressing the pushbutton R of the user interface 5.
  • the valve 21 is in the condition of Figure 4 , and the control system of the machine governs the heat pump 10 in order to bring and maintain the air of the forced flow F to a temperature substantially of between 34°C and 38°C, for example approximately 36°C. The this way, it is possible to warm the items of laundry that are already dry introduced into the drum 3 or render them tepid.
  • the program in question can hence be used, for example, for bringing certain garments up to body temperature, in order to render them pleasant to wear, such as, for example, in the case of a bathrobe to wear after a bath or a shower.
  • the same program, or a similar warming program can be envisaged for warming particular garments are worn during fitness session for slimming purposes because they increase perspiration (for example, neoprene garments that, if heated before being worn, accentuate their function).
  • the control unit 6 governs the heat pump 10, with switching of the valve 21 into the position of Figure 4 , so as to warm the load of the drum 3 progressively, in a substantially monotonic/linear way, until a predetermined temperature is reached, for example approximately 36°C, which can be detected via the sensor means 25a.
  • a predetermined temperature for example approximately 36°C, which can be detected via the sensor means 25a.
  • the unit 6 controls the heat pump 10 and the fan 7 so as to cause a substantial maintenance of the temperature thus reached.
  • the control system issues the warning that the predetermined temperature has been reached, for example via the buzzer B.
  • the user thus warned that the load has been warmed, can open the door 4, so bringing about end of the program, and take out the load.
  • the control logic is configured in such a way that the end of the program occurs upon opening of the door 4, after the predetermined temperature is reached or else - if the door is not opened - upon expiry of a predetermined maximum period of time, measured starting from start of the program, or from reaching of the predetermined temperature, or from start of the warning for the user.
  • the control system of the machine monitors, via the sensor means 25a, just the temperature of the air of the forced flow F, without monitoring humidity: what is important, in fact, for the purposes of warming or refreshing of the garments to be warn, is the fact that the pre-defined temperature is reached, which must preferably be maintained util the user brings about end of cycle by opening the door 4.
  • the typical operating programs envisaged for drying laundry envisage one or more steps in which the air is heated and forced through the drum 3 in order to dry the laundry, and at least one final step, substantially a cooling step, in the course of which the means for heating the air are inactive and the ventilation means are, instead, active.
  • This final cooling step of a drying cycle is carried out mainly because, below a threshold of absolute humidity, it becomes more advantageous to work by reducing the temperature, in order to have a higher relative humidity and favour condensation.
  • the temperature of the air is brought up to a value of stability or else to a predetermined value, which is then maintained via thermostatting for a certain time, considering that when the garments are almost dry the temperature starts to rise.
  • the program before terminating, carries out the aforesaid final cooling step.
  • the aforesaid final cooling step is absent: this precisely owing to the fact that the ultimate purpose is to take out the garments warmed to a substantially predetermined temperature.
  • the end of one or more programs can be determined by mere opening of the door of the machine, enables reaching and maintenance of predetermined treatment conditions up to any desired instant, not pre-determined by the machine, but rather determined by an action of the user.
  • a substantial advantage is that the desired final condition for the garments (heating or cooling to a certain temperature) is maintained until the user intervenes directly on the machine by opening its door: instead, in the case where the program were to terminate at a predetermined time, or when a certain temperature is reached, the effectiveness of the treatment would be markedly reduced if the user were to take out the garments from the machine after some delay).
  • a correlated advantage is the optimization of the duration of the program, and consequently of its energy consumption, which is adapted to the effective needs of the user: this is obtained with the minimum of interactions required from the user, limiting said interactions to opening of the door (which is an action in any case necessary to take out the load of laundry).
  • the frigorific cycle of the heat pump can be reversed enables enhancement of the functions of the machine, to the evident benefit of the users, who can take advantage of new useful programs, such as the refreshing program described previously.
  • a heat pump of a reversible type is particularly advantageous in view of the fact that it enables implementation in a simple and economic way of both the aforesaid refreshing program and the aforesaid warming program (as well as the traditional drying programs).
  • obtainment of an operating program with heating of the forced air, whose end is caused by the door opening can be implemented also by using air heating means differing from a reversible heat pump, such as for example a non-reversible heat pump or one or more traditional electric resistances.
  • the treatment temperatures for the refreshing program and for the warming program are temperatures pre-defined by the program.
  • the invention may, of course, be applied also to machines for washing and drying laundry, by introducing arrangements that are evident for the person skilled in the art, taking into account that in this case the laundry drum turns inside a tank.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
EP11194402.1A 2010-12-20 2011-12-19 Maschine zum Trocknen von Wäsche für die Anwendung im Haushalt Active EP2497856B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001022A ITTO20101022A1 (it) 2010-12-20 2010-12-20 Macchina per l'asciugatura di biancheria ad uso domestico

Publications (2)

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EP2497856A1 true EP2497856A1 (de) 2012-09-12
EP2497856B1 EP2497856B1 (de) 2019-01-23

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IT (1) ITTO20101022A1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
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WO2014154278A1 (en) * 2013-03-28 2014-10-02 Electrolux Appliances Aktiebolag Heat pump washing apparatus
ITTO20130586A1 (it) * 2013-07-12 2015-01-13 Indesit Co Spa Metodo di controllo di un¿apparecchiatura domestica atta ad eseguire almeno un ciclo di asciugatura di biancheria, ed apparecchiatura domestica operante secondo detto metodo di controllo
EP3173009A1 (de) 2015-11-24 2017-05-31 BSH Hausgeräte GmbH Haushaltsgerät mit einer wärmepumpe und verfahren zum betrieb eines haushaltsgeräts
WO2017089906A1 (en) 2015-11-24 2017-06-01 BSH Hausgeräte GmbH Household appliance with a heat pump and method for operating a household appliance
US10087569B2 (en) 2016-08-10 2018-10-02 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an appliance
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10519591B2 (en) 2016-10-14 2019-12-31 Whirlpool Corporation Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers
US10718082B2 (en) 2017-08-11 2020-07-21 Whirlpool Corporation Acoustic heat exchanger treatment for a laundry appliance having a heat pump system
US10738411B2 (en) 2016-10-14 2020-08-11 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
EP4067557A1 (de) * 2021-04-01 2022-10-05 Jiangsu Yoau Electric Co., Ltd. Wäschetrockner

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US4649654A (en) * 1985-03-29 1987-03-17 Hitachi, Ltd. Apparatus for controlling electric clothes dryer and method therefor
EP0436374A2 (de) * 1990-01-02 1991-07-10 Whirlpool Corporation Diagnose der Heizung und elektronische Steuerung für einen Trockner
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Cited By (16)

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WO2014154278A1 (en) * 2013-03-28 2014-10-02 Electrolux Appliances Aktiebolag Heat pump washing apparatus
ITTO20130586A1 (it) * 2013-07-12 2015-01-13 Indesit Co Spa Metodo di controllo di un¿apparecchiatura domestica atta ad eseguire almeno un ciclo di asciugatura di biancheria, ed apparecchiatura domestica operante secondo detto metodo di controllo
WO2015004611A1 (en) * 2013-07-12 2015-01-15 Indesit Company S.P.A. Method for controlling a household appliance adapted to carry out at least one laundry drying cycle, and household appliance operating according to said controlling method
EP3173009A1 (de) 2015-11-24 2017-05-31 BSH Hausgeräte GmbH Haushaltsgerät mit einer wärmepumpe und verfahren zum betrieb eines haushaltsgeräts
WO2017089906A1 (en) 2015-11-24 2017-06-01 BSH Hausgeräte GmbH Household appliance with a heat pump and method for operating a household appliance
US10087569B2 (en) 2016-08-10 2018-10-02 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10633785B2 (en) 2016-08-10 2020-04-28 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10519591B2 (en) 2016-10-14 2019-12-31 Whirlpool Corporation Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers
US10738411B2 (en) 2016-10-14 2020-08-11 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
US11299834B2 (en) 2016-10-14 2022-04-12 Whirlpool Corporation Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers
US11542653B2 (en) 2016-10-14 2023-01-03 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an appliance
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10823479B2 (en) 2017-06-01 2020-11-03 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10718082B2 (en) 2017-08-11 2020-07-21 Whirlpool Corporation Acoustic heat exchanger treatment for a laundry appliance having a heat pump system
EP4067557A1 (de) * 2021-04-01 2022-10-05 Jiangsu Yoau Electric Co., Ltd. Wäschetrockner

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