EP0933465B1 - Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner - Google Patents

Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner Download PDF

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Publication number
EP0933465B1
EP0933465B1 EP98101607A EP98101607A EP0933465B1 EP 0933465 B1 EP0933465 B1 EP 0933465B1 EP 98101607 A EP98101607 A EP 98101607A EP 98101607 A EP98101607 A EP 98101607A EP 0933465 B1 EP0933465 B1 EP 0933465B1
Authority
EP
European Patent Office
Prior art keywords
chamber
laundry
air
laundry drier
drier according
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.)
Expired - Lifetime
Application number
EP98101607A
Other languages
English (en)
French (fr)
Other versions
EP0933465A1 (de
Inventor
Kevin Maki
Patrizia Serrini
Claudio Civanelli
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 Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to DE69814025T priority Critical patent/DE69814025T2/de
Priority to EP98101607A priority patent/EP0933465B1/de
Priority to ES98101607T priority patent/ES2198606T3/es
Publication of EP0933465A1 publication Critical patent/EP0933465A1/de
Application granted granted Critical
Publication of EP0933465B1 publication Critical patent/EP0933465B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D06F58/10—Drying cabinets or drying chambers having heating or ventilating means
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/26—Condition of the drying air, e.g. air humidity or temperature

Definitions

  • the present invention relates to a laundry drier, particularly of the domestic type, comprising a chamber where laundry is contained, an outer casing housing said chamber, a blower to feed drying air through said chamber and conduits suitable to convey said drying air into and outside said chamber.
  • JP-A-03 023 896 discloses a laundry dryer where hot air is circulated transversely through a cylindrical rotating basket.
  • US-A-3 668 784 discloses a laundry dryer having tangential slot-shaped air distributors placed on a rounded bottom surface of the chamber.
  • US-A-3 303 577 discloses a laundry dryer having an inclined perforated plate or grid placed at the bottom portion of a hopper.
  • a laundry drier which comprises air distribution means placed substantially at the bottom of the chamber, the laundry being maintained in a substantially fluidized condition in said chamber by the drying air flowing through said air distribution means.
  • Another aim of the present invention is to provide a new method of laundry drying according to which an air flow entering through an air distributor agitates the load, suspending and moving it like a fluid.
  • This new and innovative technology permits to improve considerably the actual performances of the clothes dryers.
  • the benefits are the following: energy savings, fabric care, time savings and cost savings.
  • energy saving advantages of the laundry drier according to the invention it is more easy for appliances producers to cope with European Community guidelines relating to energy savings in domestic appliances, for instance in producing laundry driers in class A, without the need to provide the drier with a heat pump.
  • the remarkable potential of the new drying method permits to reach class A, using a drying process different from the traditional method. High air flow and floating of the laundry expose, on average, more surface of clothes, increasing the rate of evaporation. There is thus the possibility to improve considerably the efficiency of the drying process and to reach an efficiency closer to the theoretical limit (0.7 kWh per kg of water).
  • the theoretical limit 0.7 kWh per kg of water
  • the drying time and energy consumption can be considerably reduced.
  • Another improvement concerns the fabric care: the temperatures involved in the drying process are lower than in the traditional method and also the mechanical action on the fibers is reduced (reduced or avoided tumbling of the load).
  • a heating element may be included in the air flow path, upstream the bower 12.
  • a velocity of the air comprised preferably between 0.5 and 20 m/s, and more preferably between 1 and 10 m/s, that is sufficient to counterbalance the gravitational force, it is possible to suspend and move the load like a fluid.
  • the resulting construction is simply a box as the one shown in Figure 2, with the same external size of a conventional domestic appliance (in Europe typically cm. 60 x 60 x 85h), with the perforated plate 14 at the bottom, a blower 12 which blows the air through the perforated bottom 14 and the load and a connection funnel-shaped conduit between the blower 12 and the perforated plate 14.
  • the air distributor i.e. the perforated bottom plate 14, may have different configurations; it may be formed by concentric rings in the same plane, by concentric rings in the form of a cone, by parallel slots in a flat plate or by dished and perforated plates concave both upward or downward.
  • FIG. 3 shows another embodiment which can be compared to the so called "condenser dryer".
  • an heating element 16 and an heat exchanger 18 are added to the components disclosed with reference to the above first embodiment, and the air flow is closed in an air channel 19.
  • Another blower 20 should be added to improve the cooling of the process air.
  • the functioning is similar to the one of a conventional condenser dryer, but due to the increased air flow, the energy consumption is significantly reduced.
  • the heater 16 and the condenser 18 could be conveniently substituted by a condenser and an evaporator of a heat pump, to get a further reduction of the energy consumption.
  • Figure 4 shows another embodiment which relates to a different type of air distributor which is derived from the mechanism of the dishwasher.
  • the air is driven in the laundry chamber 10 through a rotating arm 22, similar to the ones used in the dishwashers, a part from its size, in order to enhance the even distribution of the air through the load.
  • the rotating arm 22 is provided with a plurality of air nozzles 23. The concentration of the air flow in "stronger" streams does improve the movement of the laundry.
  • All the above embodiments shown in Figures 2-4 relate to a laundry drier in which the horizontal cross section of the cabinet 10 corresponds (if the insulation thickness of the appliance is disregarded) to the cross section of the chamber in which the laundry is placed.
  • the embodiment shown schematically in Figure 5 may be adopted, in which the chamber 24 for the laundry has a circular cross section.
  • auxiliary air conduits 26 link the plenum chamber P downstream the blower 12 and upstream the air distributor 14 with lateral cylindrical wall 24a of the chamber 24.
  • the auxiliary conduits 26 are placed in the interspace between the side wall 24a of the chamber 24 and the side walls of the cabinet or casing 10.
  • the nozzles 26a of the conduits 26 adjacent the wall 24a are substantially tangential to such wall, in order to cause a swirling action on the fluidized laundry.
  • FIG 5 for sake of simplicity, only two conduits 26 are shown; of course the number of such conduits has to be chosen depending on the desired degree of swirling action.
  • a pulsing air flow may be chosen; the pulsing flow may avoid problems of clogging of the fluidized bed.
  • the frequency of air pulse and the duration of each pulse may vary in a wide range, for instance drying air flow pulses of 5-20 seconds spaced by intervals of 5 to 10 seconds.
  • the laundry drier according to the present invention may comprise a humidity sensor downstream the fluidized bed in order to end the drying cycle when the degree of humidity of air leaving laundry has reached a predetermined level.
  • the degree of humidity and/or the pressure drop across the fluidized bed may be also used for adjusting, through a control process unit of the drier, the rotational speed of the motor of blower 12 and hence the air flow rate through the fluidized bed.

Landscapes

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

Claims (6)

  1. Wäschetrockner, insbesondere als Haushaltgerät, mit einer Wäsche aufnehmenden Kammer (10, 24), einem die genannte Kammer aufnehmenden Gehäuse (10), einem Ventilator (12) zur Zuführung von Trocknungsluft zur genannten Kammer und mit Leitungen, die zur Förderung der genannten Trocknungsluft innerhalb und außerhalb der genannten Kammer geeignet sind,
    dadurch gekennzeichnet, dass er ferner eine im Wesentlichen auf dem Boden der Kammer (10, 24) angeordnete, horizontale, perforierte Platte (14) aufweist, die die Wäsche in einem im Wesentlichen fluidisierten Zustand in der Kammer durch die Trocknungsluft hält, die durch die perforierte Platte strömt, wobei der horizontale Querschnitt der Kammer (10) im Wesentlichen dem horizontalen Querschnitt des Außengehäuses (10) entspricht.
  2. Wäschetrockner nach Anspruch 1,
    dadurch gekennzeichnet, dass die genannten Leitungen Kühlmittel (18, 20) zum Kondensieren der Feuchtigkeit stromabwärts von der Kammer (10, 24) und Mittel (19) zur Zurückführung der Trocknungsluft aufweisen.
  3. Wäschetrockner nach Anspruch 1,
    dadurch gekennzeichnet, dass die genannte Kammer (24) einen im Wesentlichen runden, horizontalen Querschnitt aufweist und mit Hilfsluftverteilungsmitteln (26, 26a) versehen ist, die in eine Seitenwand (24a) der Kammer (24) führen.
  4. Wäschetrockner nach Anspruch 3,
    dadurch gekennzeichnet, dass die genannten Hilfsluftverteilungsmitteln (26) Düsen (26a) aufweisen, die im Wesentlichen in einer tangentialen Anordnung in die runde Wand (24a) der Kammer (24) einmünden.
  5. Wäschetrockner nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass er ferner einen Horizontalarm (22) aufweist, der sich um eine im Wesentlichen vertikale Achse dreht und eine Vielzahl von Düsen (23) zur Verbesserung der Fluidisierung der Wäsche hat.
  6. Wäschetrockner nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass die Luftgeschwindigkeit in der Kammer (10, 24) zwischen 0,5 und 20m/s, vorzugsweise zwischen 1 und 10m/s, liegt.
EP98101607A 1998-01-30 1998-01-30 Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner Expired - Lifetime EP0933465B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69814025T DE69814025T2 (de) 1998-01-30 1998-01-30 Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner
EP98101607A EP0933465B1 (de) 1998-01-30 1998-01-30 Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner
ES98101607T ES2198606T3 (es) 1998-01-30 1998-01-30 Secadora de ropa y procedimiento para secar ropa que emplea tal secadora.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98101607A EP0933465B1 (de) 1998-01-30 1998-01-30 Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner

Publications (2)

Publication Number Publication Date
EP0933465A1 EP0933465A1 (de) 1999-08-04
EP0933465B1 true EP0933465B1 (de) 2003-05-02

Family

ID=8231328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101607A Expired - Lifetime EP0933465B1 (de) 1998-01-30 1998-01-30 Wäschetrockner und Verfahren zum Trocknen von Wäsche mit einem solchen Wäschetrockner

Country Status (3)

Country Link
EP (1) EP0933465B1 (de)
DE (1) DE69814025T2 (de)
ES (1) ES2198606T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014100299A1 (de) 2014-01-13 2015-07-16 Miele & Cie. Kg Wäschebehandlungsmaschine zum Waschen und/oder Trocknen von Wäsche in einem feststehenden Wäschebehälter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973740B2 (en) * 2003-01-14 2005-12-13 Whirlpool Corporation Stationary clothes drying apparatus
US6860032B2 (en) 2003-01-14 2005-03-01 Whirlpool Corporation Stationary clothes drying apparatus with jet nozzles
DE102013007028A1 (de) * 2013-04-24 2014-10-30 Herbert Kannegiesser Gmbh Verfahren zum Trocknen von Wäschestücken und Trockner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303577A (en) * 1959-04-28 1967-02-14 Laing Vortex Inc Air agitated laundry drier
US3668784A (en) * 1970-05-19 1972-06-13 Columbia Gas Syst Method and apparatus for drying laundry
FR2279878A1 (fr) * 1974-07-23 1976-02-20 Vendome Cie Perfectionnements aux machines a laver et a secher le linge
JP2556902B2 (ja) * 1989-06-21 1996-11-27 益樹 高須 洗濯物等の乾燥方法
FR2687415B1 (fr) * 1992-02-17 1994-04-15 Georges Durand Armoire seche-linge.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014100299A1 (de) 2014-01-13 2015-07-16 Miele & Cie. Kg Wäschebehandlungsmaschine zum Waschen und/oder Trocknen von Wäsche in einem feststehenden Wäschebehälter

Also Published As

Publication number Publication date
DE69814025T2 (de) 2004-01-15
ES2198606T3 (es) 2004-02-01
DE69814025D1 (de) 2003-06-05
EP0933465A1 (de) 1999-08-04

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