EP2628843B1 - Appareil de traitement du linge avec nettoyage d'échangeur de chaleur - Google Patents

Appareil de traitement du linge avec nettoyage d'échangeur de chaleur Download PDF

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Publication number
EP2628843B1
EP2628843B1 EP12156202.9A EP12156202A EP2628843B1 EP 2628843 B1 EP2628843 B1 EP 2628843B1 EP 12156202 A EP12156202 A EP 12156202A EP 2628843 B1 EP2628843 B1 EP 2628843B1
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EP
European Patent Office
Prior art keywords
heat exchanger
hollow element
treatment apparatus
laundry treatment
hollow
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
EP12156202.9A
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German (de)
English (en)
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EP2628843A1 (fr
Inventor
Sergio Pillot
Marco Santarossa
Luciano Sartor
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 Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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Priority to EP12156202.9A priority Critical patent/EP2628843B1/fr
Publication of EP2628843A1 publication Critical patent/EP2628843A1/fr
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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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a laundry treatment apparatus, in particular to a dryer or a washing machine having a dryer function, comprising a heat exchanger.
  • US 2010/0192398 A1 discloses a dryer comprising a heat exchanger and an elongate injection nozzle element arranged above the heat exchanger.
  • the injection nozzle element comprises a plurality of injection holes along its longitudinal axis.
  • the nozzle is fed with fresh water from a feed pipe, which is connected to the nozzle element via a flexible pipe.
  • the nozzle element is pivotable about its longitudinal axis within a predetermined angle by means of a driving motor, such that a water spray of the nozzle element is directed towards the heat exchanger for washing off fluff, or such that it forms a water curtain in front of the heat exchanger to collect fluff from the process air before it accumulates on the heat exchanger surface.
  • the injection nozzle element is moved along its longitudinal axis by means of a driving motor to assist washing off of fluff from the heat exchanger.
  • WO 2011/154252 A1 discloses a condensation dryer having a drying chamber for articles which are to be dried, having a process-air channel, in which are located a heating means for heating the process air, a heat exchanger for cooling the process air, following passage through the drying chamber, and a fan for delivering the process air, having a cleaning device, which operates with an aqueous liquid and generates at least one liquid jet, and having a control device, wherein the cleaning device, during operation thereof, changes the direction and/or intensity of the at least one liquid jet.
  • the cleaning device has an arrangement which is in a fixed location relative to the heat exchanger and has at least one nozzle for generating the at least one liquid jet, and the cleaning device also has at least one movable body, which makes it possible to change the direction and/or intensity of the at least one liquid jet.
  • DE 10 2007 052835 A1 discloses a home appliance including an evaporator of a condenser in a process air circuit, a condensate water pan that collects water condensed by the evaporator from drying of process air, a collector tank above the evaporator having one of a rinsing tank and a rinsing chamber with a storage chamber as an overflow region, and an abruptly openable outlet, and a downpipe connected to the abruptly openable outlet to permit discharge of condensate water in the collector tank in a surge to the evaporator.
  • EP 2 365 121 A2 discloses an appliance having a pump that comprises a hose-shaped conveying element that is arranged between a fluid inlet and a fluid outlet in a conveying direction.
  • the element has a hollow space extending in the direction.
  • the hollow space is closed by valves, and a drive device causes oscillating relative movement of the valves, and periodically changes the form and volume of the hollow space.
  • One of the valves is temporarily closed when the volume of the hollow space is reduced, and another valve is temporarily closed when the volume of the hollow space is increased.
  • a laundry treatment apparatus in particular a dryer or a washing machine having a dryer function, comprises a control unit to control operation (e.g. a drying operation) of the apparatus, a laundry treatment chamber for treating laundry using process air, a process air loop for circulating the process air and a heat exchanger arranged in the process air loop for cooling the process air.
  • a hollow element is provided which is adapted to spray liquid to the heat exchanger for cleaning the heat exchanger.
  • the hollow element is in fluid communication with or is connected to a liquid supply source and comprises at least one outlet opening. The one or each outlet opening provides at least one liquid spray in operation, i.e. in a cleaning phase for the heat exchanger.
  • An actuator is adapted to actuate the hollow element along a cleaning axis such that the heat exchanger is cleaned by at least one liquid spray from the hollow element moving along the heat exchanger.
  • the hollow element and the actuator are movably coupled so as to define therebetween a variable volume, e.g. a chamber having a variable volume, fluidly connected to the liquid supply source.
  • the movable hollow element is a (hollow) cylinder and the actuator comprises a piston arranged in the cylinder.
  • the actuator comprises a (hollow) cylinder which houses or receives the hollow (cylinder) element. E.g. when liquid is supplied to the hollow element, i.e.
  • the size of the variable volume increases and the hollow element is actuated and moves along the cleaning axis together with the at least one outlet opening.
  • no driving motor is required to move a liquid spray along the heat exchanger.
  • the arrangement of the hollow element and the actuator is configured such that the hollow element moves along the cleaning axis in dependency of the liquid pressure in the hollow element or in the variable volume.
  • the hollow element moves along the axis, whereby the at least one outlet opening, i.e. the corresponding spray(s), moves along the heat exchanger and washes of fluff accumulated thereon.
  • the size of the variable volume depends on the liquid flow through the chamber or through the volume. I.e. the volume of the variable chamber and therefore the deflection or movement of the hollow element (and the at least one outlet opening) along the cleaning axis depends on the liquid flow through the chamber.
  • the size of the volume or chamber is varied in dependency of the liquid pressure. E.g. the higher the liquid pressure the larger the variable volume or chamber, i.e. the larger the deflection of the hollow element along the cleaning axis.
  • the size of the volume and therefore the deflection distance is controllable by controlling the liquid flow rate to and/or the liquid pressure in the chamber or volume.
  • the volume size is controlled by means of a pump controlled by the control unit, wherein the pump is fluidly connected to the hollow element.
  • the cleaning axis may be arranged parallel or substantially parallel to the heat exchanger.
  • a longitudinal axis of the hollow element is arranged parallel or substantially parallel to the heat exchanger. I.e. when the hollow element is actuated such that it moves along the cleaning axis, the distance between the heat exchanger and the hollow element, in particular the outlet opening(s), remains constant. Thus the liquid spray(s) are uniformly distributed along the axis to the heat exchanger during the cleaning movement.
  • the width of the liquid spray(s) provided by the outlet opening(s) in cleaning axis direction is smaller than the width of the heat exchanger (in cleaning axis direction).
  • the width is for example the spray width in movement direction and at the front surface of the heat exchanger.
  • a narrow but powerful liquid spray towards the heat exchanger is provided which even washes off fluff firmly attached to the heat exchanger surface.
  • the width of the liquid spray(s) generated by the outlet opening(s) covers at most 1/3, 1/4, 1/5 or 1/6 of the heat exchanger width.
  • the at least one outlet opening is configured to point towards the heat exchanger when moving along the axis.
  • the at least one outlet opening points towards an upper portion of the heat exchanger, such that liquid distributed to the heat exchanger via the at least one outlet opening first hits the upper portion of the heat exchanger and then flows down the heat exchanger, whereby fluff is washed off the heat exchanger surface.
  • at least two or more outlet openings are provided in the hollow element, wherein each outlet opening is adapted to generate a liquid spray directed towards a different portion of the heat exchanger.
  • a first outlet opening is directed to an upper portion or upper half of the heat exchanger and a second outlet opening is directed to a lower portion or lower half, whereby the heat exchanger is thoroughly cleaned.
  • each outlet opening is adapted to provide a plurality of liquid sprays to the heat exchanger.
  • a plurality of outlet openings is adapted to provide one liquid spray to the heat exchanger.
  • the hollow element may be arranged upstream the heat exchanger.
  • a horizontal heat exchanger i.e. process air passes the heat exchanger horizontally or substantially horizontally
  • the hollow element and in particular the at least one outlet opening is arranged in front of a vertical front surface or cross section of the heat exchanger which is passed by process air first.
  • the hollow element or its longitudinal axis is arranged upstream the heat exchanger parallel or substantially parallel to the front surface at or at about half the height of the heat exchanger, wherein the at least one outlet opening preferably is adapted to provide a liquid spray which covers the complete height of the heat exchanger.
  • the actuator is at least partially (e.g. unidirectionally) operated hydraulically.
  • the hollow element is a (movable) cylinder portion of the actuator and the actuator further comprises a stationary piston.
  • the stationary piston part of actuator
  • the stationary piston is arranged in the movable cylinder (hollow element), wherein the variable volume is arranged between the piston and the cylinder.
  • the stationary piston is e.g. attached or fixed to a housing of the apparatus.
  • the hollow element is a (movable and hollow) piston portion of the actuator and the actuator comprises a stationary cylinder portion.
  • the piston portion (hollow element) is movably guided or arranged inside the stationary cylinder portion (part of actuator), wherein the variable volume is located between the piston portion and the stationary cylinder portion.
  • the cleaning device for cleaning the heat exchanger comprises an actuator having a stationary element (piston or cylinder) and a movable hollow element (cylinder, piston portion) which are movably coupled to define therebetween the variable volume.
  • the actuator comprises a stationary hollow piston or a stationary hollow cylinder, e.g. a pipe, in fluid communication with the hollow element and connected to the liquid supply source such that the hollow element is supplied with liquid via the hollow piston.
  • a space saving arrangement is provided in that the actuator acts as a liquid supply line.
  • an aperture or outlet cross section of the hollow piston is larger than the cross section of the at least one outlet opening of the hollow element.
  • the cross section of an inlet to the hollow element or variable volume is larger than the cross section of the outlet of the hollow element (in case of more than one hollow element the 'outlet cross section area is the sum of the areas of the outlet cross sections).
  • the actuator comprises a stationary piston which is at least partially arranged in the hollow element, wherein the hollow element comprises an inlet opening or a lug configured to be connected to the liquid supply source.
  • the hollow element comprises an inlet as well as an outlet opening for liquid.
  • a flexible conduit is arranged between the inlet opening at the hollow element and a fluid connection to the liquid supply source, such that the flexible conduit is configured to move with the hollow element along the cleaning axis. I.e. when liquid is supplied to the hollow element (i.e. to the variable volume) the variable volume increases or decreases as described above such that the hollow element (and outlet opening(s)) move along the cleaning axis.
  • the cross section of the inlet opening is larger than the cross section of the at least one outlet opening.
  • the cross section of the at least one outlet opening or the sum of cross-sections of the outlet openings is smaller than the cross section of the inlet opening.
  • an elastic element or resetting element which is configured to provide a restoring force (for example a spring bias) such that an initial position of the hollow element is restored after a deflection of the hollow element along the cleaning axis.
  • a restoring force for example a spring bias
  • a spring element like a steel spring or gas spring.
  • the elastic element is part of the actuator and wherein the elastic element is arranged between a or the piston and the hollow element.
  • an extension spring is attached to a fixed end of the stationary piston and to an opposed end of the movable cylinder (hollow element), wherein the spring is arranged e.g. on the outside of the hollow element.
  • the elastic element may be arranged within the hollow element.
  • the elastic element e.g. a spring
  • the elastic element is protected from contamination or fluff, in particular when the hollow element is arranged in the process air channel upstream the heat exchanger.
  • the cleaning device comprises a stationary piston (part of actuator) with a cylinder and a piston pipe or rod attached thereto.
  • the piston is received in the hollow element, wherein the above described variable volume (chamber) is arranged between the end of the hollow element which comprises the at least one outlet opening and the side of the piston cylinder facing that end.
  • a corresponding second variable volume is provided in the hollow element on the opposite side of the cylinder. I.e. when liquid is fed to the (first) variable volume, the volume increases and the hollow element is moved along the cleaning axis as described above, wherein the second variable volume decreases.
  • the hollow element can be returned to its initial position after the supply of liquid to the (first) volume has been stopped by feeding liquid to the second volume such that the variable volume increases, whereby the hollow element is moved back to its initial position.
  • the supply source comprises a supply pump or a valve, which is e.g. connected to the hollow element (or hollow piston) via a feed pipe.
  • a supply pump or a valve which is e.g. connected to the hollow element (or hollow piston) via a feed pipe.
  • the treatment apparatus comprises a condensate collector for collecting condensate generated by the heat exchanger, wherein the hollow element is (fluidly) connected to the condensate collector, for example via a feed pipe.
  • the heat exchanger is cleaned or washed with condensate, i.e. the fresh water consumption of the treatment apparatus is reduced.
  • a filter element may be arranged upstream the hollow element or downstream the condensate collector.
  • fluff is filtered from the collected condensate before it is fed to the hollow element, i.e. the heat exchanger is washed or rinsed with clean water.
  • a basement or base section of the apparatus comprises an upper shell and a lower shell to form a portion of the drying circuit where the heat exchanger is arranged. I.e. only two parts have to be assembled to provide a base section or a housing for the heat exchanger which facilitates the assembly of the apparatus and reduces the assembly time.
  • the upper shell comprises a housing for the hollow element and the actuator, such that the hollow element is arranged inside the drying circuit portion formed by the upper and lower shell.
  • the upper shell and the housing for the hollow element and the actuator are made in a single-piece construction.
  • the upper shell comprises an elongate connecting aperture for the at least one liquid spray or for the at least one outlet opening moving along the heat exchanger.
  • the movable hollow element and the actuator are separated or are essentially separated from the process air channel and therefore protected from e.g. fluff.
  • the cleaning device i.e. hollow element and actuator, does not or essentially not disturb the process air flow.
  • a housing for the hollow element is separately attached to the upper shell or at least a portion of the housing for the hollow element is formed integrally with the upper shell (e.g. side walls), wherein a separate cover provides an airtight seal for the nozzle element in its housing.
  • the upper shell and at least a portion of the housing are made in a single-piece construction. I.e. the upper shell and the housing form a substantially air-tight chamber to prevent or reduce leakage of drying air from the drying circuit.
  • the lower shell forms the condensate collector where a supply pump for supplying liquid or condensate to the hollow element is arranged.
  • a heat pump system for the treatment apparatus as described above.
  • the heat pump system includes a compressor, a first heat exchanger as described above, expansion means and a second heat exchanger, wherein the first heat exchanger is adapted to cool down the drying air and heat up the refrigerant flowing through the heat pump system, the second heat exchanger is adapted to heat up the drying air and cool down the refrigerant and the hollow element is adapted to spray liquid to at least one between the first and second heat exchanger.
  • Fig. 1 shows a schematically depicted laundry treatment apparatus 2 which in this embodiment is a heat pump tumble dryer.
  • the tumble dryer 2 comprises a heat pump system 4, including a closed refrigerant loop 6 which comprises in the following order of refrigerant flow B: a first heat exchanger 10 acting as evaporator for evaporating the refrigerant and cooling process air, a compressor 14, a second heat exchanger 12 acting as condenser for cooling the refrigerant and heating the process air, and an expansion device 16 from where the refrigerant is returned to the first heat exchanger 10.
  • the heat pump system forms the refrigerant loop 6 through which the refrigerant is circulated by the compressor 14 as indicated by arrow B.
  • the process air flow within the treatment apparatus 2 is guided through a compartment 18 of the home appliance 2, i.e. through a compartment for receiving articles to be treated, e.g. a drum 18.
  • the articles to be treated are textiles, laundry 19, clothes, shoes or the like.
  • the process air flow is indicated by arrows A in Fig. 1 and is driven by a process air blower 8.
  • the process air channel 20 guides the process air flow A outside the drum 18 and includes different sections, including the section forming the battery channel 20a in which the first and second heat exchangers 10, 12 are arranged.
  • the process air exiting the second heat exchanger 12 flows into a rear channel 20b in which the process air blower 8 is arranged.
  • the air conveyed by blower 8 is guided upward in a rising channel 20c to the backside of the drum 18.
  • the air exiting the drum 18 through the drum outlet (which is the loading opening of the drum) is filtered by a fluff filter 22 arranged close to the drum outlet in or at the channel 20.
  • the optional fluff filter 22 is arranged in a front channel 20d forming another section of channel 20 which is arranged behind and adjacent the front cover of the dryer 2.
  • the condensate formed at the first heat exchanger is collected and guided to the condensate collector 30.
  • the condensate collector 30 is connected via a drain pipe 46, a filter element 24, a drain pump 36, a valve 38 and a drawer pipe 50 to an extractable condensate drawer 40. I.e. the collected condensate can be pumped from the collector 30 to the drawer 40 which is arranged at an upper portion of the apparatus 2 from where it can be comfortably withdrawn and emptied by a user.
  • a cleaning device 41 is provided close to the heat exchanger 10.
  • the condensate collector 30 is connected via the drain pipe 46, the drain pump 36, the valve 38 and a feed pipe 48 to the cleaning device 41, wherein the drain pump 36 and the valve 38 are controlled by a control unit of the apparatus 2.
  • a circulation pump 37 ( Fig. 2 ) is provided to pump condensate from the collector 30 to the cleaning device 41 - i.e. the circulation pump 37 is provided additionally to the drain pump 36.
  • Fig. 2 shows a top view of a base section 5 or basement of the dryer 2 according to a first embodiment with the cleaning device 41 in an initial or idle position.
  • the cleaning device 41 comprises a movable hollow cylinder 42 as hollow element which is guided by a stationary (hollow) piston 44 ( Fig. 3 ) as stationary element received in the cylinder 42.
  • a variable volume chamber 34a-c ( Figs. 7a-c ) as variable volume is provided between the hollow cylinder 42 and the stationary piston 44.
  • the hollow cylinder 42 comprises at its end portion a nozzle or outlet 54 as outlet opening which is directed towards the heat exchanger 10. Liquid is supplied to the hollow cylinder 42 or the variable volume 34a-c via the feed pipe 48 and the stationary hollow piston 44 which acts as a liquid supply line.
  • Fig. 3 shows a top view of the basement of Fig. 2 with the cylinder 42 in a maximum deflected position. I.e. the liquid pressure in the variable volume 34a-c has pushed the movable cylinder 42 along the axis D to an end position. Thus the complete width of the heat exchanger 10 (in direction of axis D) has been washed by the liquid spray of the outlet 54.
  • the basement 5 houses amongst others the heat exchangers 10, 12 and is formed by a lower shell 60 and an upper shell 58.
  • Fig. 4 shows a perspective top view of the lower shell 60 of the basement 5 of Fig. 2 .
  • condensate from the condensate collector 30 or tray is pumped by means of the circulation pump 37 and via the feed pipe 48 to the hollow cylinder 42.
  • the cleaning axis D is arranged parallel to a vertical front surface 54 of the heat exchanger 10, such that the distance between the front surface 54 and the outlet 54 or nozzle of the cylinder 42 is constant during the cleaning movement.
  • Fig. 5 shows a perspective top view of the basement 5 of Fig. 2 and Fig. 5a a detail of the cleaning device 41 of Fig. 5 .
  • the cylinder 42 is depicted in its initial position where the nozzle outlet 54 is directed to an outer edge or side (right side in the depicted embodiment) of the heat exchanger 10 such that a liquid spray from the outlet 54 washes or cleans the heat exchanger starting from the outer edge.
  • the end position of the cylinder 42 is such that the opening 54 or at least the liquid spray reaches the opposite outer edge or side of the heat exchanger 10, such that the complete width of the heat exchanger (in direction of axis D), i.e. the complete front surface 54, is cleaned by the liquid spray.
  • Fig. 6 shows a sectional side view of the basement 5 of Fig. 2 along the line A-A perpendicular to the movement axis D of the hollow cylinder 42.
  • the cleaning device 41 i.e. the movable cylinder 42 and the stationary piston 44, is arranged in the front channel 20d upstream and in front of the heat exchanger 10.
  • the nozzle or outlet 54 points to a front surface 56 or cross section of the heat exchanger 10 where the process air coming from the drum passes first the heat exchanger 10.
  • at least some fluff conveyed by the process air from the laundry in the drum accumulates on the front surface 56.
  • the nozzle 54 is adapted to generate a liquid spray which covers an upper portion of the heat exchanger 10 or front surface 56, wherein the liquid distributed to the heat exchanger 10 flows down the heat exchanger 10 and washes off fluff towards the condensate collector 30 or tray below the heat exchanger 10.
  • the collected condensate is circulated with the circulation pump 37 back to the cleaning device 41 to be used again for cleaning the heat exchanger 10, wherein the condensate is filtered by the filter element 24 before it is fed to the hollow element 42.
  • Figs. 7a-c show sectional side views of the basement 5 of Fig. 2 along the line B-B, i.e. along the movement axis D of the moveable cylinder 42.
  • Fig. 7a shows the hollow cylinder 42 in its initial position with the variable volume 34a having a minimum size.
  • a spring element 62 as elastic element is arranged between the stationary piston 44 and the hollow cylinder 42 and provides that the cylinder 42 is kept in or returns to its initial position when liquid pressure in the variable volume 34a generates a deflection force that is smaller than a restoring force of the spring element 62.
  • the stationary piston 44 is hollow and has an inlet 52 as inlet opening to the variable volume 34a between the hollow element 42 and the piston 44.
  • a piston gasket 64 is provided at the free end of the piston 44 to provide a movable or slidable and leak-proof connection between the piston 44 and the cylinder 42 or volume 34a.
  • the piston 44 is connected to the feed pipe 48 to supply liquid, i.e. condensate, to the variable volume 34a.
  • the cross section of the inlet 52 to the variable volume 34a is larger than the cross section of the outlet 54 out of the variable volume 34a.
  • liquid pressure builds-up in the variable volume 34a such that the moveable cylinder 42 is pushed along the axis D as shown in Figs. 7b-c . While the cylinder 42 is pushed along the axis D liquid is ejected via the outlet 54 in a liquid spray, i.e. the liquid spray moves along the heat exchanger 10.
  • variable volume 34c has a maximum size.
  • the liquid spray has at least covered or moved along the complete width of the heat exchanger 10 in direction of axis D.
  • the control unit is adapted to switch off the corresponding pump 36, 37 or is adapted to reduce the pumping speed or flow rate thereof, such that the liquid supply to the hollow cylinder 42 is stopped or reduced.
  • the residual liquid pressure in the hollow element 42 or variable volume 34c is gradually released via the nozzle outlet 54 while the restoring force of the spring element 62 moves the cylinder 42 back to its initial position as shown in Fig. 7a .
  • the above described movement from the initial position ( Fig. 7a ) to the end position ( Fig. 7c ) and back to the initial position is executed at least once during a cleaning phase for the heat exchanger, preferably several times.
  • Fig. 8 shows a sectional side view of a cleaning device 41' according to a second embodiment in the plane of the movement axis D of the cleaning device 41.
  • Fig. 9 shows a sectional side view of the cleaning device 41' of Fig. 8 in a plane perpendicular to the movement axis D.
  • elements as well as operation modes of the cleaning device 41' of the second embodiment correspond to the elements and operation modes of the cleaning device 41 of the above described embodiment.
  • Like reference numerals are used for like elements.
  • a variable volume 34' between a hollow cylinder 42' and a stationary piston 44' of the cleaning device 41' of Fig. 8 is supplied with liquid through an inlet 52' or lug provided at the hollow cylinder 42'.
  • the inlet 52' or lug is located at a free end portion of the hollow element 42' where also the nozzle outlet 54 is arranged.
  • the stationary piston 44' of the second embodiment is not used as a liquid supply line to the hollow cylinder 42'.
  • the spring element 62 is arranged between the piston 44' and the hollow cylinder 42' as described above. To provide a pressure build-up in the variable volume as described above the cross section of the inlet 52' is larger than the cross-section of the outlet 54.
  • condensate F is fed to the hollow element 42' via the inlet 52' at an upper portion of the hollow element 42', wherein condensate F is ejected in a liquid spray out of the outlet 54 at a lateral or side portion of the hollow element 42'.
  • a flexible hose (not depicted) is arranged between the inlet 52' or lug and the feed pipe 48 such that during operation of the cleaning device 41' the movement of the hollow cylinder 42' along the axis D is not restricted.
  • the operation of the cleaning device 41' during a cleaning phase for cleaning the heat exchanger 10 corresponds to the above described operation of the cleaning device 41 according to the first embodiment.

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

Claims (17)

  1. Appareil de traitement de linge, en particulier sèche-linge ou machine à laver ayant une fonction de sèche-linge, comprenant
    une unité de commande,
    une chambre de traitement de linge (18) pour traiter du linge (19) en utilisant de l'air de traitement,
    une boucle d'air de traitement (20, 20a-d) pour faire circuler l'air de traitement,
    un échangeur de chaleur (10) agencé dans la boucle d'air de traitement pour refroidir l'air de traitement, et un dispositif de nettoyage pour nettoyer l'échangeur de chaleur (10), le dispositif de nettoyage comprenant un actionneur comprenant un élément stationnaire (44, 44') et un élément creux mobile (42, 42'),
    dans lequel l'élément creux (42, 42') comprend au moins une ouverture de sortie (54), et dans lequel l'élément creux (42, 42') est en communication fluidique avec une source d'alimentation en liquide et adapté pour pulvériser un liquide vers l'échangeur de chaleur (10) par l'intermédiaire d'au moins un pulvérisateur de liquide à partir de l'au moins une ouverture de sortie (54) pour nettoyer l'échangeur de chaleur, et
    dans lequel l'actionneur actionne l'élément creux (42, 42') le long d'un axe de nettoyage (D) de telle sorte que l'échangeur de chaleur (10) soit nettoyé par au moins un pulvérisateur de liquide se déplaçant le long de l'échangeur de chaleur (10),
    l'élément creux mobile (42, 42') et l'élément stationnaire (44, 44') sont couplés de façon mobile afin de définir entre ceux-ci un volume variable (34a-c) fluidiquement raccordé à la source d'alimentation en liquide
    caractérisé en ce que
    le volume (34a-c) est varié en dépendance de la pression ou du débit de liquide.
  2. Appareil de traitement de linge selon la revendication 1, dans lequel l'agencement de l'élément creux (42, 42') et de l'actionneur est configuré de telle sorte que l'élément creux (42, 42') se déplace le long de l'axe de nettoyage (D) en dépendance de la pression de liquide dans ou du débit à travers l'élément creux (42, 42') ou le volume variable (34a-c).
  3. Appareil de traitement de linge selon l'une quelconque des revendications 1 à 2,
    dans lequel l'actionneur est au moins partiellement actionné hydrauliquement ou est actionné hydrauliquement de façon unidirectionnel, et
    dans lequel l'élément creux (42, 42') est une portion cylindrique de l'actionneur et l'actionneur comprend en outre un piston stationnaire (44, 44') en tant qu'élément stationnaire, ou
    dans lequel l'élément creux (42, 42') est une portion à piston de l'actionneur et l'actionneur comprend une portion cylindrique stationnaire en tant qu'élément stationnaire.
  4. Appareil de traitement de linge selon l'une quelconque des revendications 1 à 3, dans lequel l'actionneur comprend un piston creux stationnaire (44) en communication fluidique avec l'élément creux (42) et fluidiquement raccordé à la source d'alimentation en liquide de telle sorte que l'élément creux (42) soit alimenté en liquide par l'intermédiaire du piston creux (44).
  5. Appareil de traitement de linge selon la revendication 4, dans lequel une section transversale de sortie du piston creux (44) est plus grande que la section transversale de l'au moins une ouverture de sortie (54).
  6. Appareil de traitement de linge selon l'une quelconque des revendications 1 à 3, dans lequel l'actionneur comprend un piston stationnaire (44, 44') en tant qu'élément stationnaire qui est au moins partiellement agencé dans l'élément creux (42, 42').
  7. Appareil de traitement de linge selon la revendication 6, dans lequel l'élément creux (42') comprend une ouverture d'entrée (52') ou un tenon configuré pour être raccordé à la source d'alimentation en liquide.
  8. Appareil de traitement de linge selon la revendication 7, dans lequel la section transversale de l'ouverture d'entrée (52') est plus grande que la section transversale de l'au moins une ouverture de sortie (54).
  9. Appareil de traitement de linge selon la revendication 7 ou 8, dans lequel un conduit flexible est agencé entre l'ouverture d'entrée (52') et la source d'alimentation en liquide de telle sorte que le conduit flexible soit configuré pour se déplacer avec l'élément creux (42') le long de l'axe (D).
  10. Appareil de traitement de linge selon l'une quelconque des revendications précédentes, comprenant un élément élastique (62) configuré pour fournir une force de rappel de telle sorte qu'une position initiale ou de repos de l'élément creux (42, 42') soit restaurée après une déflexion de l'élément creux (42, 42') le long de l'axe de nettoyage (D).
  11. Appareil de traitement de linge selon la revendication 10, dans lequel l'élément élastique (62) fait partie de l'actionneur et dans lequel l'élément élastique (62) est agencé entre un ou le piston (44, 44') et l'élément creux (42, 42').
  12. Appareil de traitement de linge selon l'une quelconque des revendications précédentes, dans lequel la source d'alimentation comprend une pompe d'alimentation (36, 37) ou une vanne,
    dans lequel la pompe (36, 37) est allumée ou une vanne est ouverte pour commencer un mouvement de nettoyage le long de l'axe (D), et
    dans lequel la pompe (36, 37) est éteinte ou la vanne est fermée pour remettre l'élément creux (42, 42') dans une position initiale.
  13. Appareil de traitement de linge selon l'une quelconque des revendications précédentes, comprenant un collecteur de condensat (30) pour collecter un condensat généré par l'échangeur de chaleur (10), dans lequel l'élément creux (42, 42') est raccordé au collecteur de condensat (30).
  14. Appareil de traitement de linge selon l'une quelconque des revendications précédentes, dans lequel une base (5) comprend une enveloppe supérieure (58) et une enveloppe inférieure (60) pour former une portion du circuit de séchage où l'échangeur de chaleur (10) est agencé.
  15. Appareil de traitement de linge selon la revendication 14, dans lequel l'enveloppe supérieure (58) comprend un logement pour l'élément creux (42, 42') et l'actionneur.
  16. Appareil de traitement de linge selon la revendication 14 ou 15, dans lequel l'enveloppe inférieure (60) forme le collecteur de condensat (30) où une pompe d'alimentation (36, 37) pour l'élément creux (42, 42') est agencée.
  17. Appareil de traitement de linge selon l'une quelconque des revendications précédentes, dans lequel un système de pompe à chaleur est prévu, qui inclut un compresseur (14), un premier échangeur de chaleur (10), des moyens de dilatation (16) et un second échangeur de chaleur (12), le premier échangeur de chaleur (10) est adapté pour refroidir l'air de séchage et chauffer le réfrigérant s'écoulant à travers le système de pompe à chaleur, le second échangeur de chaleur (12) est adapté pour chauffer l'air de séchage et refroidir le réfrigérant, dans lequel l'élément creux (42, 42') est adapté pour pulvériser un liquide sur au moins l'un entre les premier et second échangeur de chaleur (10, 12).
EP12156202.9A 2012-02-20 2012-02-20 Appareil de traitement du linge avec nettoyage d'échangeur de chaleur Active EP2628843B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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EP12156202.9A EP2628843B1 (fr) 2012-02-20 2012-02-20 Appareil de traitement du linge avec nettoyage d'échangeur de chaleur

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EP2628843B1 true EP2628843B1 (fr) 2020-04-08

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Publication number Priority date Publication date Assignee Title
DE102013217467A1 (de) * 2013-09-02 2015-03-05 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit Wegeventil

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EP2203585B1 (fr) 2007-09-04 2017-08-16 LG Electronics Inc. Déshumidificateur pour sèche-linge
DE102007052835A1 (de) * 2007-11-06 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zum Reinigen eines Bauteiles, insbesondere eines Verdampfers einer Kondensatoreinrichtung sowie Wasch- oder Wäschetrockner mit einer solchen Vorrichtung
DE102010002663A1 (de) * 2010-03-08 2011-09-08 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät zur Behandlung von Wäsche
DE102010029892A1 (de) * 2010-06-09 2011-12-15 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit integrierter Wärmetauscherreinigung sowie Verfahren zu seinem Betrieb

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