EP0265332B1 - Apparatus with a rotating drum for drying laundry by means of air circulation - Google Patents

Apparatus with a rotating drum for drying laundry by means of air circulation Download PDF

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Publication number
EP0265332B1
EP0265332B1 EP87402318A EP87402318A EP0265332B1 EP 0265332 B1 EP0265332 B1 EP 0265332B1 EP 87402318 A EP87402318 A EP 87402318A EP 87402318 A EP87402318 A EP 87402318A EP 0265332 B1 EP0265332 B1 EP 0265332B1
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EP
European Patent Office
Prior art keywords
drum
air
laundry
ribs
creating
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EP87402318A
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German (de)
French (fr)
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EP0265332A1 (en
Inventor
Christian Burgel
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Compagnie Industrielle dAppareils Menagers SA CIAPEM
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Compagnie Industrielle dAppareils Menagers SA CIAPEM
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Priority to AT87402318T priority Critical patent/ATE65558T1/en
Publication of EP0265332A1 publication Critical patent/EP0265332A1/en
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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis

Definitions

  • the present invention relates to a rotary drum device drying laundry by air circulation.
  • Known apparatuses with rotary horizontal drum drying clothes by circulation of hot air such as a tumble dryer or a washer-dryer with drum usually comprise a horizontal drum with a perforated rotating wall and lifting the wet clothes to dry for the 'expose to an axial current of hot air sent into this drum through an inlet sheath, by a fan.
  • the hot drying air which is charged with humidity extracted from the damp linen is collected in an outlet duct to be either rejected outside the appliance or dehumidified by passage through a condenser and heated by an electric heating element before to be returned again to the laundry drum by this fan to start a new cycle, and so on until the end of the drying operation.
  • Another known open circuit drying apparatus described in document AT-A-190,024 also comprises a single stream of drying air passing through its laundry drum, during drying.
  • This stream of drying air coming from outside, heated during its passage through heating elements at the top of the device is sucked either by a fan installed at the bottom of the device to pass diametrically through the laundry drum by entering and leaving it by perforations in the diametrically opposite upper and lower parts of its shell, or by a fan mounted in the rear of the appliance on the axis of rotation of the drum to pass through it drum by entering it through perforations in the ferrule and leaving it by perforations in its rear flange.
  • Parts of the laundry in the vicinity of the side portions of the drum in the first case and those in the vicinity of the front flange of the drum in the second case are not in contact with the stream of drying air and are of this fact poorly dried.
  • the drying air flow is then not exploited to the maximum of its drying power. Its performance is poor.
  • the aim of the present invention is to avoid these drawbacks and makes it possible to produce an economical device with a rotary drum which dries linen efficiently and quickly by air circulation.
  • an apparatus with a perforated rotary drum drying laundry by air circulation which enters through a flange in this drum and exits through the side wall of the latter, characterized in that it comprises at least means (12, 43, 72, 118) creating by an air outlet of this drum (3) through its side wall (8) a depression inside this drum (3) and a draft of air in this drum (3) through its front (9) and rear (10) flanges and its side wall (8), two movements or air currents (Fa, Ff) symmetrical with respect to its median transverse plane (14), one (Fa) leaving radially from the side wall and returning axially by the rear flange, and the other (Ff) leaving radially from the side wall and returning axially by the front flange of this drum and means creating a current d air (Fm) around this drum.
  • the invention is applicable to the dryer and to the washer-dryer.
  • FIGS. 1 and 2 A horizontal rotary drum device drying clothes by air circulation in the form of a dryer 1, produced according to the invention, is partially and schematically illustrated in FIGS. 1 and 2.
  • the dryer 1 comprises a preferably thermally insulating body 2, a horizontal laundry drum 3 driven in rotation about a horizontal axis 13 by means of an electric motor 4 and a belt 5.
  • the dryer 1 includes, like dryers -washing of the examples illustrated in Figures 1 to 5 a front opening 6 for access to the laundry drum 3.
  • a dryer includes an opening of top loading.
  • the laundry drum 3 is provided with holes or perforations 7 both in its cylindrical side wall 8 and in its front 9 and rear flanges 10.
  • the laundry drum 3 has, in its internal surface, laundry lifting ribs 11.
  • the line dryer 1 with a laundry drum 3 comprises, for rapid drying of the laundry, at least means creating, by an air outlet from this drum through the holes or perforations 7 in its side wall 8, a depression inside the washing drum 3 and an air draw in this drum through the perforations 7 of the front 9 and rear 10 flanges of the latter and the heating means.
  • the tumble dryer 1 with a tumble drum 3 comprises means creating a movement or current of air around this tumble drum 3.
  • the dryer 1 with horizontal washing machine drum 3 comprises, for gradually removing the hot humid air leaving the washing machine drum 3, means creating a current of air coming from outside, passing through the appliance through the space surrounding it. laundry drum.
  • the dryer 1 with a laundry drum 3 comprises as means creating a vacuum inside the laundry drum and a draft of air in this drum, in other words as means of creation of air movements or drafts, on the one hand parallel spaced fins 12 formed on the outer surface of the side wall 8 of this drum in the longitudinal direction of the latter and on the other hand perforations or holes 7 formed at both in the side wall 8 and in the front 9 and rear 10 flanges of this drum.
  • These spaced fins 12 are parallel either to the generators of this drum or to the propellers chosen on the side wall 8 of this drum.
  • the parallel fins 12 create in the manner of a turbine by a centrifugal radial outlet of the air from this drum through the holes 7 of the side wall 8, a depression at the inside this drum 3. This depression generates a call in the drum 3 through the holes 7 of the front 9 and rear flanges 10, air being in the space surrounding the drum 3.
  • heating means 15 and 16 constituted either by electric heating resistors or by sources of infrared radiation of a known type are some 15 mounted in the air currents Fa, preferably parallel to the rear flange 10 of the drum 3 and the others 16 mounted in the air streams Ff preferably parallel to the front flange 9 of the drum.
  • the heating means 15 and 16 are constituted by electric heating resistors, the air leaving the drum 3 is thus heated before being sucked back into this drum.
  • the heating means 15 and 16 are constituted by sources of infrared radiation, the wet linen is directly heated, through the perforations of the drum 3, by these sources of radiation.
  • thermally insulating plates 19, 20 and / or reflectors not shown which prevent significant losses. of thermal energy emitted by the heating means 15 and 16.
  • the means for creating a current of air passing through the device comprise on the one hand inside the body 2, a fan 22 and on the other hand openings 23, 24, 25 formed respectively in the lower part of the rear wall 17 and in the upper part of the front wall 18 of the body 2 of the washing machine 1.
  • the fan 22 by sucking outside air Fe through the opening or openings d entry 23 into the washing machine 1 and by driving the air mixture Fm, Fe through the outlet openings 24 25 towards the outside, creates an air movement Fm, Fe passing through the dryer 1.
  • the laundry drum 3 rotates; its ribs 11 lift the damp linen and expose it to the air circulating in the drum, which takes moisture from the linen, its fins 12 create symmetrical movements or currents of air Fa and Ff constituted by a radial outlet from the hot air charged with moisture taken from the linen by the holes 7 of the side wall of the drum in the space surrounding this drum and a reentry in this drum 3 through the holes 7 of the flanges 9 and 10, air in this space which is heated by heating means 15 and 16 when these heating means consist of electric heating resistors, and its fan 23 draws in outside air Fe through the inlet opening or openings 23, adds it to the mixture Fm or Fa, Ff of hot air charged with humidity to renew the latter and discharges outside the device through the openings 24, 25 an amount of this set of mixed air Fm, Fe equivalent to that of the outside air Fe sucked in, and ev This gradually reduces the moisture extracted from the laundry until the end of the drying operation.
  • a high-flow air circulation loop Fa, Fb, Ff and a discharge or dehumidification loop Fe at low flow are thus formed in the dryer 1.
  • the flow rate of each of these loops is adjustable, which prevents the discharge of hot, unsaturated humid air outside the device.
  • the heating means 15 and 16 are constituted by sources of infrared radiation, the wet linen is directly heated by these sources while the air in the space surrounding the drum 3 before it is returned to this drum, does not not appreciably influenced by these sources of radiation.
  • the air circulating in the drum 3 draws moisture from hot, damp laundry heated directly by these sources of infrared radiation.
  • the dryer also includes at its lower part a tank 28 for receiving condensation water.
  • a tumble dryer 30 comprises a preferably thermally insulating body 31, a front door 38, a laundry drum 32 similar to the laundry drum 3 of the above example. , held in a horizontal position by two sets of front and rear rollers 33 and 34, and rotated by an electric motor 35 through a transmission system 36 and a friction roller 37.
  • the laundry drum 32 includes holes or perforations 39 both in its side wall 40 and in its front 41 and rear 42 flanges, and parallel fins 43 longitudinal or helically on its side wall 40.
  • These fins 43 create, during the rotation of the drum 32, a vacuum and an air draft inside the latter, which generates two movements or air currents Fa and Ff symmetrical with respect to a median transverse plane 44 of the drum 32 , formed on the one hand by air currents Fa exiting radially by the side wall 40 of the drum 32 and returning axially by the rear flange 42 and on the other hand by air currents Ff exiting radially by the side wall 40 of the drum 32 and returning axially through the front flange 41.
  • These rotating fins 43 also constitute means creating a third movement or air flow Fm around the drum 32 in the direction of rotation of the latter, formed by a mixture of current of air Fa and Ff.
  • the air streams Fa and Ff are respectively heated by heating means 45 and 46 when they are constituted by electric heating resistors.
  • these heating means 45 and 46 are constituted by infrared sources of a known type, the wet linen is directly heated by these sources while the air currents Fa and Ff do not undergo an appreciable influence from these sources.
  • the dryer 30 comprises in its lower part, below the drum 32, a condenser 48 which provides condensation and a progressive evacuation of the moisture extracted from the linen transported by the current Fm of air or air mixture Fa and Ff charged with moisture leaving the laundry drum 32.
  • the condenser 48 which is an air-cooled condenser sent by a blower 49 of the tangential turbine type comprises on the one hand parallel transverse fins of condensation 50 projecting inwards of the dryer 30 and orthogonal to the horizontal axis 52 of rotation of the laundry drum 32, and on the other hand parallel longitudinal cooling fins 53, projecting outwards from the dryer 30 and oriented parallel to the direction of the cooling air sent by the blower 49.
  • the laundry drum 32 rotates, its ribs 55 lift the wet laundry and expose it to the air circulating in this drum, which takes moisture from the laundry, its fins 43 create on the one hand symmetrical movements or streams of air Fa and Ff constituted by a radial outlet of the hot air charged with moisture taken from the laundry by the holes 39 of the side wall 40 of the drum in the space surrounding this drum, and reentry into this drum through the holes 39 of the flanges 41, 42, of air in this space, heated by heating means 45, 46, when these heating means are constituted by electric heating resistors and on the other hand, a movement or current of hot air charged with humidity Fm (coming from a mixture of hot and humid air Fa and Ff) around the drum 32, and force this hot air charged with humidity Fm to come into contact with the condenser fins 50 of the condenser 48.
  • a movement or current of hot air charged with humidity Fm (coming from a mixture of hot and humid air Fa and Ff) around the drum 32, and force
  • the humi Dity extracted from the laundry is thus condensed and discharged to the outside of the dryer 30 by a pipe not shown or stored in a removable receptacle not shown.
  • insulating plates 56, 57 are mounted between the latter and walls of the adjacent bodywork 31.
  • a dryer 58 comprises a bodywork 59 similar to that 31 of the first variant, preferably thermally insulating, and comprising a front access opening 60 and a condenser 61 with air cooling sent by a turbine blower 62 in the lower part of the body, below the laundry drum 65.
  • the condenser 61 is provided with condensation fins 63 parallel, orthogonal to the axis of rotation 66 drum, projecting towards the inside of the body 59 and cooling fins 64, parallel, projecting towards the outside of the dryer 58.
  • the dryer 58 comprises a laundry drum 65 rotating about an axis horizontal 66.
  • Means for creating a vacuum and a draft of air inside the laundry drum 65 or means for creating air currents are formed on the one hand by a ring of spaced apart longitudinal fins, parallel 72 rotating concentrically around this laundry drum 65 and on the other hand by holes or perforations 67 both in the side wall 68 and in the rear 69 and front flanges 70 of this drum 65.
  • the laundry drum 65 rotates at a speed of the order of 50 revolutions / minute, lifts the damp laundry by its ribs 73 and exposes it to the air circulating in the drum, and the crown of fins parallel 72 rotates at a speed of the order of 500 revolutions / minute concentrically with this drum 65 and creates through the side walls 68 and flanges 69, 70 provided with holes or perforations 67, a depression inside this drum 65 generating two movements or air currents Fa and Ff symé triques with respect to a median transverse plane 74 of the laundry drum 65 formed by streams of hot air charged with moisture extracted from the laundry Fa, Ff emerging radially from this drum through the side wall 68 and by streams of air Fa, Ff heated by the heating means 76, 77 when these means are constituted by electric heating resistors, entering axially in this drum through the flanges 69, 70.
  • This ring of fins 72 in rotation also constitutes means creating in the space surrounding the laundry drum 65 and the ring of fins 72, a movement or stream of air Fm formed of a mixture of hot air charged with humidity extracted from the linen Fa, Ff so that this mixture of hot air charged with humidity is forced to come into contact with the condensation fins 63 of the condenser 61 and to get rid of its humidity there.
  • the moisture extracted from the laundry to be dried in the drum 65 is thus gradually trapped in this condenser 61, and discharged outside the dryer by known means not shown.
  • the heating means 76, 77 are constituted by sources of infrared radiation, the wet linen is directly heated by these sources, through the perforations of the drum, while the air in the space surrounding the drum 65 does not undergo a significant influence from these sources.
  • the air-cooled condenser 61, 62 is replaced by means creating a current Fe of air coming from outside, passing through the device through the space surrounding the laundry drum analogous to means 22, 23, 24 of the example illustrated in FIGS. 1 and 2.
  • the ring of fins 72 is formed of spaced longitudinal fins 79. These fins are parallel either to the generators of the laundry drum 65, or to the propellers chosen on the side wall 68 of this drum, and assembled in a ring to be fixed on a rotary support 80 coaxial with this drum and provided with radial arms 81.
  • the ring of fins 72 is rotated by an electric motor 83 through a belt 84 and the drum laundry 65 is in turn driven in rotation by this ring of fins 72 through a known speed reduction system 85.
  • the laundry drum 65 and the ring of fins 72 are preferably respectively supported in a horizontal position, at the level of their front edges, by sets of free rotating rollers 86, 87 carried by fixed supports 88 and one or more pivoting clamping supports 89. To avoid a significant loss of thermal energy emitted by the heating means 76, 77 of the thermally insulating plates 91, 92 are mounted between the latter and adjacent body walls 9.
  • a dryer 100 comprises a body 101 preferably thermally insulating and comprising a top loading opening 102 and a condenser 104 with air cooling sent by a turbine blower 105 in the lower part of the body below a laundry drum 106 rotating around a horizontal axis 108 and provided with an access opening 114, closed by a door 115.
  • Means for creating a vacuum and an air draw inside the laundry drum 106 or means for creating air currents comprise, on the one hand, holes or perforations 109 both in the wall lateral 110 and in the rear flanges 111 and front 112 of this laundry drum 106, on the other hand, longitudinal or helical parallel fins 118 formed on the outer lateral wall 110 of this drum 106.
  • These fins 118 create during the rotation of a drum 106 a depression and an air draw inside the latter, generating on the one hand two movements or air currents Fa and Ff symmetrical with respect to a median transverse plane 120 of this drum 106, one formed by air currents Fa radially exiting through the side wall 110 of the drum 106 and returning axially by the rear flange 111, and the other by air currents Ff exiting radially through the side wall 110 of the drum 106 and returning axially by l e front flange 112, and on the other hand a third movement or air flow Fm around this drum 106 in the direction of rotation of the latter, formed by a mixture of part of these air currents Fa and Ff.
  • the air currents Fa and Ff are respectively heated by heating means 121 and 122 when these are constituted by electric heating resistors.
  • these heating means 121 and 122 are constituted by infrared sources of a known type, the damp linen in the drum 106 is directly heated by these sources while the air currents Fa and Ff do not undergo an appreciable influence from these sources.
  • Thermally insulating plates 128, 129 are mounted between the heating means 121, 122 and the walls of the body 101.
  • the condenser 104 which, being located in the lower part of the dryer 100, below the drum 106, and having condensation fins 130 projecting inside the body 101 and arranged orthogally to the axis of rotation 108 of this drum 106 and of the cooling fins 131 projecting from the outside, ensures a condensation and a progressive evacuation of the moisture extracted from the laundry transported by the current Fm of air, charged with moisture leaving the laundry drum 106
  • the laundry drum 106 is held in a horizontal position by two sets of front 135 and rear 136 rollers and rotated by an electric motor 137 through a transmission system 138 with friction roller 139.
  • the symmetrical movements or air currents Fa, Ff generated by the means for creating a vacuum and a call for air inside the laundry drum described above make it possible to effectively bring the air into contact damp laundry subjected to drying, to avoid unused paths of air through the laundry drum, due to a lack of contact with damp laundry, especially when this wet laundry is in small quantity, to accelerate the extraction humidity of the wet laundry, and thus achieve an appreciable saving compared to a drying operation of the wet laundry in a known dryer where the stream of drying air passes through the laundry drum only in a transverse direction, in other words enters the drum through a part of its side wall and leaves this drum through a part of its side wall of this drum.
  • the parallel spaced fins are either curved fins or straight radial fins, that is to say a - say perpendicular to the tangents to the drum at their projection points on the latter, either inclined straight fins relative to the radial directions of this drum, in other words forming an angle alpha with the radial directions or these tangents to the drum at their projection points on this last.
  • the heating means are constituted by sources of infrared radiation
  • the heat of vaporization necessary for the evaporation of the water retained by the load of linen subjected to drying is brought directly to the wet surface of this linen to dry, and the heat transfer between the heating source and the load in wet linen does not depend on the filling coefficient of the drum.
  • the movements or air currents inside the device can be distinguished a loop of circulating air at high flow and a loop of exhaust air or dehumidification at low flow.
  • the high flow circulating air loop allows high air passage speeds to be obtained, thereby improving the heat exchange coefficients and contributing accordingly with the humidity exhaust air loop at low flow rate, to effectively obtain an absence of rejection outside the apparatus of enormous quantities of hot and humid air, and at the same time a good performance, by an absence of rejection outside of the unsaturated moist hot air apparatus, thanks to the ability of the apparatus to regulate, independently of one another, the flow rate of the circulating air loop and the flow rate of the air loop d evacuation of humidity or dehumidification.
  • the means for creating a vacuum and an air draw inside the laundry drum or means for creating air currents described above rotate much slower than a power unit. ventilator of known devices, hence a low level of operating noise of the device is recorded.
  • a relatively simple structure of the apparatus described above achieves a low industrial cost without compromising the reliability of the manufactured device.

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

Abstract

The apparatus includes means (7, 12) for creating at least two air-drying movements or currents (Fa, Ff) in the washing drum around its side wall and its front and back, these currents being symmetrical with respect to the median transverse plane of the drum. One of the currents (Fa) leaves the side wall radially and re-enters axially through the back, while the other (Ff) leaves the side wall radially and re-enters axially through the front of the drum. <IMAGE>

Description

La présente invention concerne un appareil à tambour rotatif séchant du linge par circulation d'air.The present invention relates to a rotary drum device drying laundry by air circulation.

Les appareils connus à tambour horizontal rotatif séchant du linge par circulation d'air chaud tel qu'un sèche-linge à tambour ou un lavant-séchant à tambour comprennent habituellement un tambour horizontal à paroi perforée tournant et soulevant le linge humide à sécher pour l'exposer à un courant axial d'air chaud envoyé dans ce tambour à travers une gaine d'entrée, par un ventilateur. L'air chaud de séchage qui se charge d'humidité extraite du linge humide est recueillie dans une gaine de sortie pour être soit rejeté à l'extérieur de l'appareil soit déshumidifié par passage dans un condenseur et réchauffé par une résistance électrique chauffante avant d'être retourné de nouveau au tambour à linge par ce ventilateur pour recommencer un nouveau cycle, et ainsi de suite jusqu'à la fin de l'opération de séchage.Known apparatuses with rotary horizontal drum drying clothes by circulation of hot air such as a tumble dryer or a washer-dryer with drum usually comprise a horizontal drum with a perforated rotating wall and lifting the wet clothes to dry for the 'expose to an axial current of hot air sent into this drum through an inlet sheath, by a fan. The hot drying air which is charged with humidity extracted from the damp linen is collected in an outlet duct to be either rejected outside the appliance or dehumidified by passage through a condenser and heated by an electric heating element before to be returned again to the laundry drum by this fan to start a new cycle, and so on until the end of the drying operation.

Les appareils connus à tambour horizontal rotatif séchant du linge par circulation d'air chaud comprennent de grands inconvévénients dont les principaux sont rappelés ci-après. Dans ces appareils connus, le rendement décroît lorsque la charge de linge à sécher est plus réduite.Known devices with a horizontal rotary drum drying linen by circulation of hot air include major drawbacks, the main ones of which are recalled below. In these known devices, the yield decreases when the load of laundry to be dried is reduced.

En effet, lorsque la charge de linge est plus faible, la surface d'échange entre l'air chaud du séchage et le linge humide diminue (cette surface échange étant consitituée par celle du linge à sécher) la part relative de débit d'air chaud qui traverse le tambour sans rencontrer le linge augmente et est évacuée en pure perte. La diminution de rendement allonge relativement la durée de séchage.Indeed, when the load of linen is weaker, the surface of exchange between the hot air of drying and the wet linen decreases (this surface exchange being constituted by that of the linen to be dried) the relative share of air flow hot which crosses the drum without meeting the linen increases and is discharged in pure waste. The decrease in yield relatively lengthens the drying time.

Dans les appareils connus à circuit ouvert la totalité du débit d'air qui alimente le tambour à linge est rejetée à l'extérieur.In known open circuit devices, the entire air flow which feeds the laundry drum is discharged to the outside.

Le grand volume d'air rejeté de l'appareil constitue un important vecteur de transport des poussières. En cas d'un raccordement de l'appareil à une gaine d'évacuation vers l'extérieur de la pièce où est entreposé cet appareil, cette gaine doit-être de grosse section pour conduire ce débit d'air. Il est difficile de saturer d'humidité ce gros débit d'air, d'où une perte de rendement. La vitesse d'évaporation étant proportionnelle à l'écart de températures entre l'air de séchage et la surface du linge et au coefficient d'échange thermique, pour obtenir un séchage de durée la plus courte possible, on a intérêt à augmenter:

  • le coefficient d'échange thermique, c'est-à-dire, la vitesse de passage d'air sur le linge, autrement dit le débit d'air, et/ou
  • la différence de températures entre l'air de séchage et le linge, c'est-à-dire la puissance de chauffage jusqu'à la limite de la température de sécurité admise par le linge.
The large volume of air released from the device is an important vector for transporting dust. If the appliance is connected to a discharge duct outside the room where is stored this device, this sheath must be of large section to conduct this air flow. It is difficult to saturate this large air flow with humidity, resulting in a loss of efficiency. As the evaporation rate is proportional to the temperature difference between the drying air and the surface of the laundry and to the heat exchange coefficient, to obtain drying of the shortest possible duration, it is advantageous to increase:
  • the heat exchange coefficient, that is to say, the speed of air passage over the laundry, in other words the air flow rate, and / or
  • the temperature difference between the drying air and the laundry, i.e. the heating power up to the limit of the safety temperature allowed by the laundry.

Or les appareils connus sont définis de façon à ce que la température maximum vue par une petite charge donnée de linge sec reste inférieure à la température de sécurité qui est généralement inférieure ou égale à 105° C pour le coton et à 60° C pour le synthétique.Now known devices are defined so that the maximum temperature seen by a small given load of dry laundry remains below the safety temperature which is generally less than or equal to 105 ° C for cotton and 60 ° C for cotton. synthetic.

Dans ces conditions, on comprend que lorsque ces appareils connus sont utilisés à pleine charge en linge, la température de fonctionnement au niveau du linge est très en dessous de la température que pourrait supporter le linge, la durée de séchage s'en trouve ainsi relativement allongée par rapport à ce qu'elle pourrait être.Under these conditions, it is understood that when these known devices are used at full load in the laundry, the operating temperature at the laundry is very below the temperature that the laundry could withstand, the drying time is thus relatively elongated compared to what it could be.

Un des appareils de séchage connus à circuit ouvert d'air est décrit dans le document US-A-2 543 579. Cet appareil comprend lors d'un séchage du linge dans son tambour un seul courant d'air de séchage qui traverse ce tambour. Ce courant d'air de séchage appelé par le tambour en rotation vient de l'atmosphère extérieure, traverse des éléments chauffants pour être porté à une température de séchage, pénètre axialement dans le tambour à linge par une ouverture centrale d'un flasque arrière plein du tambour pour entrer en contact avec du linge à sécher, contourne l'obstacle constitué par un flasque frontal plein de ce tambour, sort latéralement par des perforations de la virole du tambour, suit des parois d'une enveloppe en volute qui entoure ce tambour et traverse un filtre à bourre avant de s'échapper à l'extérieur de l'appareil. Ce courant d'air de séchage n'entre pas en contact avec des parties de linge se trouvant dans la proximité du flasque frontal plein de ce tambour qui constitue un obstacle qu'il contourne. Ces parties de linge sont mal séchées. Ainsi, le courant d'air de séchage n'est pas exploité au maximum.One of the known drying apparatus with an open air circuit is described in document US-A-2,543,579. This apparatus comprises, during drying of the laundry in its drum, a single stream of drying air which passes through this drum . This current of drying air drawn by the rotating drum comes from the external atmosphere, passes through heating elements to be brought to a drying temperature, enters axially into the laundry drum through a central opening of a full rear flange. of the drum to come into contact with laundry to be dried, bypasses the obstacle constituted by a full front flange of this drum, leaves laterally by perforations in the shell of the drum, follows the walls of a volute casing which surrounds this drum and passes through a fluff filter before escaping outside the device. This stream of drying air does not come into contact with parts of the laundry located in the vicinity of the full front flange of this drum which constitutes an obstacle which it bypasses. These parts of the laundry are not properly dried. Thus, the drying air flow is not exploited to the maximum.

Un autre appareil de séchage connu à circuit ouvert décrit dans le document AT-A-190 024 comprend également un seul courant d'air de séchage traversant son tambour à linge, lors d'un séchage. Ce courant d'air de séchage venant de l'extérieur, réchauffé au cours de son passage à travers des éléments chauffants dans le haut de l'appareil, est aspirè soit par un ventilateur installé dans le bas de l'appareil pour traverser diamétralement le tambour à linge en y entrant et en en sortant par des perforations des parties supérieures et inférieures diamétralement opposées de sa virole, soit par un ventilateur monté dans l'arrière de l'appareil sur l'axe de rotation du tambour pour passer à travers ce tambour en en entrant par des perforations de la virole et en en sortant par des perforations de son flasque arrière. Des parties du linge se trouvant dans la proximité des parties latérales du tambour dans le premier cas et celles se trouvant dans la proximité du flasque frontal du tambour dans le deuxième cas ne sont pas en contact avec le courant d'air de séchage et sont de ce fait mal séchées. le courant d'air de séchage n'est pas alors exploité au maximum de son pouvoir de séchage. Son rendement s'avère mauvais.Another known open circuit drying apparatus described in document AT-A-190,024 also comprises a single stream of drying air passing through its laundry drum, during drying. This stream of drying air coming from outside, heated during its passage through heating elements at the top of the device, is sucked either by a fan installed at the bottom of the device to pass diametrically through the laundry drum by entering and leaving it by perforations in the diametrically opposite upper and lower parts of its shell, or by a fan mounted in the rear of the appliance on the axis of rotation of the drum to pass through it drum by entering it through perforations in the ferrule and leaving it by perforations in its rear flange. Parts of the laundry in the vicinity of the side portions of the drum in the first case and those in the vicinity of the front flange of the drum in the second case are not in contact with the stream of drying air and are of this fact poorly dried. the drying air flow is then not exploited to the maximum of its drying power. Its performance is poor.

La présente invention ayant pour but d'éviter ces inconvénients, permet de réaliser un appareil économique à tambour rotatif séchant efficacement et rapidement du linge par circulation d'air.The aim of the present invention is to avoid these drawbacks and makes it possible to produce an economical device with a rotary drum which dries linen efficiently and quickly by air circulation.

Selon l'invention, un appareil à tambour rotatif perforé séchant du linge par circulation d'air qui entre à travers un flasque dans ce tambour et sort à travers la paroi latérale de ce dernier, caractérisé en ce qu'il comprend au moins des moyens (12, 43, 72, 118) créant par une sortie d'air de ce tambour (3) à travers sa paroi latérale (8) une dépression à l'intérieur de ce tambour (3) et un appel d'air dans ce tambour (3) à travers ses flasques frontal (9) et arrière (10) et de sa paroi latérale (8), deux mouvements ou courants d'air (Fa, Ff) symétriques par rapport à son plan transversal médian (14), l'un (Fa) sortant radialement de la paroi latérale et rentrant axialement par le flasque arrière, et l'autre (Ff) sortant radialement de la paroi latérale et rentrant axialement par le flasque frontal de ce tambour et des moyens créant un courant d'air (Fm) autour de ce tambour.According to the invention, an apparatus with a perforated rotary drum drying laundry by air circulation which enters through a flange in this drum and exits through the side wall of the latter, characterized in that it comprises at least means (12, 43, 72, 118) creating by an air outlet of this drum (3) through its side wall (8) a depression inside this drum (3) and a draft of air in this drum (3) through its front (9) and rear (10) flanges and its side wall (8), two movements or air currents (Fa, Ff) symmetrical with respect to its median transverse plane (14), one (Fa) leaving radially from the side wall and returning axially by the rear flange, and the other (Ff) leaving radially from the side wall and returning axially by the front flange of this drum and means creating a current d air (Fm) around this drum.

Pour mieux faire comprendre l'invention on en décrit ci-après un certain nombre d'exemples de réalisation illustrés par des dessins ci-annexés dont:

  • la figure 1 représente une vue partielle schématique en coupe verticale d'un appareil réalisé selon l'invention sous forme d'un sèche linge;
  • la figure 2 représente une vue partielle schématique de face de sèche linge de la figure 1;
  • la figure 3 représente à une autre échelle une vue partielle schématique en coupe verticale d'une première variante de réalisation du sèche linge de la figure 1;
  • la figure 4 représente une vue partielle schématique de face du sèche linge de la figure 3, et;
  • la figure 5 représente à une autre échelle, une vue schématique en coupe verticale partielle d'une deuxième variante de réalisation du sèche linge de la figure 1;
  • la figure 6 représente une vue schématique en coupe verticale partielle du sèche linge de la figure 5, et
  • la figure 7 représente une vue schématique en coupe verticale partielle d'un autre exemple de réalisation de l'appareil de l'invention.
To better understand the invention, a number of embodiments are described below, illustrated by the appended drawings, including:
  • Figure 1 shows a schematic partial view in vertical section of an apparatus produced according to the invention in the form of a dryer;
  • 2 shows a partial schematic front view of the dryer of Figure 1;
  • 3 shows on another scale a schematic partial view in vertical section of a first alternative embodiment of the dryer of Figure 1;
  • 4 shows a partial schematic front view of the dryer of Figure 3, and;
  • 5 shows on another scale, a schematic view in partial vertical section of a second alternative embodiment of the dryer of Figure 1;
  • FIG. 6 represents a schematic view in partial vertical section of the dryer of FIG. 5, and
  • Figure 7 shows a schematic view in partial vertical section of another embodiment of the apparatus of the invention.

L'invention est applicable au sèche linge et au lavant séchant.The invention is applicable to the dryer and to the washer-dryer.

Un appareil à tambour horizontal rotatif séchant du linge par circulation d'air sous forme d'un sèche linge 1, réalisé selon l'invention, est partiellement et schématiquement illustré dans les figures 1 et 2.A horizontal rotary drum device drying clothes by air circulation in the form of a dryer 1, produced according to the invention, is partially and schematically illustrated in FIGS. 1 and 2.

Le sèche linge 1 comprend une carrosserie de préférence thermiquement isolante 2, un tambour horizontal à linge 3 entraîné en rotation autour d'un axe horizontal 13 au moyen d'un moteur électrique 4 et une courroie 5. Le sèche linge 1 comprend comme les sèche-linge des exemples illustrés dans les figures 1 à 5 une ouverture frontale d'accès 6 au tambour à linge 3. Pour l'exemple illustré dans la figure 7, un sèche-linge comprend une ouverture de chargement par le dessus. Le tambour à linge 3 est pourvu de trous ou perforations 7 à la fois dans sa paroi latérale cylindrique 8 et dans ses flasques frontal 9 et arrière 10. Le tambour à linge 3 comprend dans sa surface intérieure des nervures de soulèvement de linge 11.The dryer 1 comprises a preferably thermally insulating body 2, a horizontal laundry drum 3 driven in rotation about a horizontal axis 13 by means of an electric motor 4 and a belt 5. The dryer 1 includes, like dryers -washing of the examples illustrated in Figures 1 to 5 a front opening 6 for access to the laundry drum 3. For the example illustrated in Figure 7, a dryer includes an opening of top loading. The laundry drum 3 is provided with holes or perforations 7 both in its cylindrical side wall 8 and in its front 9 and rear flanges 10. The laundry drum 3 has, in its internal surface, laundry lifting ribs 11.

Le sèche ligne 1 à tambour à linge 3 comprend pour un séchage rapide du linge, au moins des moyens créant par une sortie d'air de ce tambour à travers les trous ou perforations 7 de sa paroi latérale 8 une dépression à l'intérieur du tambour à linge 3 et un appel d'air dans ce tambour à travers les perforations 7 des flasques frontal 9 et arrière 10 de ce dernier et des moyens chauffants.The line dryer 1 with a laundry drum 3 comprises, for rapid drying of the laundry, at least means creating, by an air outlet from this drum through the holes or perforations 7 in its side wall 8, a depression inside the washing drum 3 and an air draw in this drum through the perforations 7 of the front 9 and rear 10 flanges of the latter and the heating means.

Le sèche linge 1 à tambour à linge 3 comprend des moyens créant un mouvement ou courant d'air autour de ce tambour à linge 3.The tumble dryer 1 with a tumble drum 3 comprises means creating a movement or current of air around this tumble drum 3.

Le sèche linge 1 à tambour horizontal à linge 3 comprend pour évacuer progressivement l'air chaud humide sortant du tambour à linge 3, des moyens créant un courant d'air venant de l'extérieur, traversant l'appareil par l'espace entourant ce tambour à linge.The dryer 1 with horizontal washing machine drum 3 comprises, for gradually removing the hot humid air leaving the washing machine drum 3, means creating a current of air coming from outside, passing through the appliance through the space surrounding it. laundry drum.

Dans l'exemple illustré dans les figure 1 et 2, le sèche linge 1 à tambour à linge 3 comprend comme moyens créant une dépression à l'intérieur du tambour à linge et un appel d'air dans ce tambour, autrement dit comme moyens de création de mouvements ou courants d'air, d'une part des ailettes espacées parallèles 12 formées sur la surface extérieure de la paroi latérale 8 de ce tambour dans le sens longitudinal de ce dernier et d'autre part des perforations ou trous 7 formés à la fois dans la paroi latérale 8 et dans les flasques frontal 9 et arrière 10 de ce tambour. Ces ailettes espacées 12 sont parallèles soit aux génératrices de ce tambour soit aux hélices choisies sur la paroi latérale 8 de ce tambour. Lors d'une rotation du tambour à linge 3, les ailettes parallèles 12 créent à la manière d'une turbine par une sortie radiale centrifuge de l'air de ce tambour à travers les trous 7 de la paroi latérale 8, une dépression à l'intérieur de ce tambour 3. Cette dépression engendre un appel dans le tambour 3 à travers les trous 7 des flasques frontal 9 et arrière 10, de l'air se trouvant dans l'espace entourant le tambour 3. Il se crée ainsi, dans le tambour 3 et autour de ses deux flasques frontal 9 et arrière 10 et de la paroi latérale 8 deux mouvements ou courants d'air Fa et Ff symétriques, par rapport à son plan transversal médian 14, formés d'une part par des courants d'air Fa sortant radialement par la paroi latérale 8 du tambour 3 et rentrant axialement par le flasque arrière 10, et d'autre part par des courants d'air Ff sortant radialement par la paroi latérale 8 du tambour 3 et rentrant axialement par le flasque frontal 9. Ces aillettes espacées 12 en rotation consituent également des moyens créant autour du tambour dans le sens de rotation de celui-ci, un troisième mouvement ou courant d'air Fm formé par un mélange d'air Fa et Ff.In the example illustrated in FIGS. 1 and 2, the dryer 1 with a laundry drum 3 comprises as means creating a vacuum inside the laundry drum and a draft of air in this drum, in other words as means of creation of air movements or drafts, on the one hand parallel spaced fins 12 formed on the outer surface of the side wall 8 of this drum in the longitudinal direction of the latter and on the other hand perforations or holes 7 formed at both in the side wall 8 and in the front 9 and rear 10 flanges of this drum. These spaced fins 12 are parallel either to the generators of this drum or to the propellers chosen on the side wall 8 of this drum. During a rotation of the laundry drum 3, the parallel fins 12 create in the manner of a turbine by a centrifugal radial outlet of the air from this drum through the holes 7 of the side wall 8, a depression at the inside this drum 3. This depression generates a call in the drum 3 through the holes 7 of the front 9 and rear flanges 10, air being in the space surrounding the drum 3. It is thus created, in the drum 3 and around its two front flanges 9 and rear 10 and the side wall 8 two movements or drafts Fa and Ff symmetrical, with respect to its median transverse plane 14, formed on the one hand by air currents Fa exiting radially by the side wall 8 of the drum 3 and returning axially by the rear flange 10, and on the other hand by air currents Ff leaving radially by the side wall 8 of the drum 3 and returning axially by the front flange 9. These spaced fins 12 in rotation also constitute means creating around the drum in the direction of rotation of the latter, a third movement or air flow Fm formed by a mixture of air Fa and Ff.

Dans le sèche linge 1 des moyens chauffants 15 et 16 constitués soit par des résistances électriques chauffantes soit par des sources de rayonnement infrarouge d'un type connu sont les uns 15 montés dans les courants d'air Fa, de préférence parallèles au flasque arrière 10 du tambour 3 et les autres 16 montés dans les courants d'air Ff de préférence parallèles au flasque frontal 9 du tambour. Quand les moyens chauffants 15 et 16 sont constitués par des résistances électriques chauffantes l'air sortant du tambour 3 est ainsi réchauffé avant d'être réaspiré dans ce tambour. Quand les moyens chauffants 15 et 16 sont constitués par des sources de rayonnement infrarouge, le linge humide est directement réchauffé, à travers les perforations du tambour 3, par ces sources de rayonnement.In the dryer 1 heating means 15 and 16 constituted either by electric heating resistors or by sources of infrared radiation of a known type are some 15 mounted in the air currents Fa, preferably parallel to the rear flange 10 of the drum 3 and the others 16 mounted in the air streams Ff preferably parallel to the front flange 9 of the drum. When the heating means 15 and 16 are constituted by electric heating resistors, the air leaving the drum 3 is thus heated before being sucked back into this drum. When the heating means 15 and 16 are constituted by sources of infrared radiation, the wet linen is directly heated, through the perforations of the drum 3, by these sources of radiation.

Dans l'exemple illustré, entre les moyens chauffants 15 et 16 et les parois arrière 17 et frontale 18 de la carrosserie du sèche linge 1 sont montés respectivement des plaquettes thermiquement isolantes 19,20 et/ou des réflecteurs non représentés qui empêchent des pertes sensibles d'energie thermique émise par les moyens chauffants 15 et 16.In the example illustrated, between the heating means 15 and 16 and the rear 17 and front 18 walls of the body of the dryer 1 are mounted respectively thermally insulating plates 19, 20 and / or reflectors not shown which prevent significant losses. of thermal energy emitted by the heating means 15 and 16.

Dans le sèche linge 1, les moyens de création d'un courant d'air traversant l'appareil comprennent d'une part à l'intérieur de la carrosserie 2, un ventilateur 22 et d'autre part des ouvertures 23, 24, 25 formées respectivement à la partie inférieure de la paroi arrière 17 et à la partie supérieure de la paroi frontale 18 de la carrosserie 2 du lave linge 1. Le ventilateur 22 en aspirant de l'air extérieur Fe par la ou les ouvertures d'entrée 23 dans le lave linge 1 et en refoulant le mélange d'air Fm, Fe par les ouvertures de sortie 24 25 vers l'extérieur, crée un mouvement d'air Fm, Fe traversant le sèche linge 1.In the dryer 1, the means for creating a current of air passing through the device comprise on the one hand inside the body 2, a fan 22 and on the other hand openings 23, 24, 25 formed respectively in the lower part of the rear wall 17 and in the upper part of the front wall 18 of the body 2 of the washing machine 1. The fan 22 by sucking outside air Fe through the opening or openings d entry 23 into the washing machine 1 and by driving the air mixture Fm, Fe through the outlet openings 24 25 towards the outside, creates an air movement Fm, Fe passing through the dryer 1.

Au cours d'un fonctionnement du sèche linge 1, le tambour à linge 3 tourne; ses nervures 11 soulèvent le linge humide et l'exposent à l'air circulant dans le tambour, qui prélève de l'humidité du linge, ses ailettes 12 créent des mouvements ou courants symétriques d'air Fa et Ff consititués par une sortie radiale de l'air chaud chargé d'humidité prélevée du linge par les trous 7 de la paroi latérale du tambour dans l'espace entourant ce tambour et une rentrée dans ce tambour 3 à travers les trous 7 des flasques 9 et 10, de l'air dans cet espace qui est réchauffé par des moyens chauffants 15 et 16 quand ces moyens chauffants sont constitués par des résistances électriques chauffants, et son ventilateur 23 aspire de l'air extérieur Fe par la ou les ouvertures d'entrée 23, l'ajoute au mélange Fm ou Fa, Ff d'air chaud chargé d'humidité pour renouveler ce dernier et refoule à l'extérieur de l'appareil par les ouvertures 24, 25 une quantité de cet ensemble d'air mélangé Fm, Fe équivalente à celle de l'air extérieur Fe aspiré, et évacue ainsi progressivement l'humidité extraite du linge jusqu'à la fin de l'opération de séchage. Il se forme ainsi dans le sèche linge 1 une boucle de circulation d'air à gros débit Fa, Fb, Ff et une boucle d'évacuation ou de deshumidification Fe à faible débit. Le débit de chacune de ces boucles est réglable, ce qui permet d'éviter de rejeter de l'air chaud humide non saturé à l'extérieur de l'appareil. Quand les moyens chauffants 15 et 16 sont constitués par des sources de rayonnement infrarouge, le linge humide est directement réchauffé par ces sources tandis que l'air dans l'espace entourant le tambour 3 avant qu'il ne soit rappelé dans ce tambour, ne subit pas une influence appréciable de ces sources de rayonnement. L'air circulant dans le tambour 3 prélève l'humidité du linge chaud humide réchauffé directement par ces sources de rayonnement infrarouge. Le sèche linge comprend également à sa partie inférieure un bac 28 de réception d'eau de condensation.During an operation of the dryer 1, the laundry drum 3 rotates; its ribs 11 lift the damp linen and expose it to the air circulating in the drum, which takes moisture from the linen, its fins 12 create symmetrical movements or currents of air Fa and Ff constituted by a radial outlet from the hot air charged with moisture taken from the linen by the holes 7 of the side wall of the drum in the space surrounding this drum and a reentry in this drum 3 through the holes 7 of the flanges 9 and 10, air in this space which is heated by heating means 15 and 16 when these heating means consist of electric heating resistors, and its fan 23 draws in outside air Fe through the inlet opening or openings 23, adds it to the mixture Fm or Fa, Ff of hot air charged with humidity to renew the latter and discharges outside the device through the openings 24, 25 an amount of this set of mixed air Fm, Fe equivalent to that of the outside air Fe sucked in, and ev This gradually reduces the moisture extracted from the laundry until the end of the drying operation. A high-flow air circulation loop Fa, Fb, Ff and a discharge or dehumidification loop Fe at low flow are thus formed in the dryer 1. The flow rate of each of these loops is adjustable, which prevents the discharge of hot, unsaturated humid air outside the device. When the heating means 15 and 16 are constituted by sources of infrared radiation, the wet linen is directly heated by these sources while the air in the space surrounding the drum 3 before it is returned to this drum, does not not appreciably influenced by these sources of radiation. The air circulating in the drum 3 draws moisture from hot, damp laundry heated directly by these sources of infrared radiation. The dryer also includes at its lower part a tank 28 for receiving condensation water.

Selon une première variante de réalisation schématiquement illustrée dans les figures 3 et 4 un sèche linge 30 comprend une carrosserie de préférence thermiquement isolante 31, une porte frontale 38, un tambour à linge 32 analogue au tambour à linge 3 de l'exemple ci-dessus, maintenu en position horizontale par deux jeux de galets frontaux 33 et arrière 34, et entraîné en rotation par un moteur électrique 35 à travers un système de transmission 36 et un galet de friction 37. Le tambour à linge 32 comprend des trous ou perforations 39 à la fois dans sa paroi latérale 40 et dans ses flasques frontal 41 et arrière 42, et des ailettes parallèles 43 longitudinales ou en hélice sur sa paroi latérale 40.According to a first variant embodiment diagrammatically illustrated in FIGS. 3 and 4, a tumble dryer 30 comprises a preferably thermally insulating body 31, a front door 38, a laundry drum 32 similar to the laundry drum 3 of the above example. , held in a horizontal position by two sets of front and rear rollers 33 and 34, and rotated by an electric motor 35 through a transmission system 36 and a friction roller 37. The laundry drum 32 includes holes or perforations 39 both in its side wall 40 and in its front 41 and rear 42 flanges, and parallel fins 43 longitudinal or helically on its side wall 40.

Ces ailettes 43 créent durant la rotation du tambour 32 une dépression et un appel d'air à l'intérieur de ce dernier, qui engendre deux mouvements ou courants d'air Fa et Ff symétriques par rapport à un plan transversal médian 44 du tambour 32, formés d'une part par des courants d'air Fa sortant radialement par la paroi latérale 40 du tambour 32 et rentrant axialement par le flasque arrière 42 et d'autre part par des courants d'air Ff sortant radialement par la paroi latérale 40 du tambour 32 et rentrant axialement par le flasque frontal 41. Ces ailettes 43 en rotation consituent également des moyens créant un troisième mouvement ou courant d'air Fm autour du tambour 32 dans le sens de rotation de ce dernier, formé par un mélange de courant d'air Fa et Ff. Avant leur rentrée dans le tambour 32, les courants d'air Fa et Ff sont respectivement réchauffés par des moyens chauffants 45 et 46 quand ils sont constitués par des résistances électriques chauffantes. Quand ces moyens chauffants 45 et 46 sont constitués par des sources d'infrarouge d'un type connu, le linge humide est directement réchauffé par ces sources tandis que les courants d'air Fa et Ff ne subissent pas une influence appréciable de ces sources.These fins 43 create, during the rotation of the drum 32, a vacuum and an air draft inside the latter, which generates two movements or air currents Fa and Ff symmetrical with respect to a median transverse plane 44 of the drum 32 , formed on the one hand by air currents Fa exiting radially by the side wall 40 of the drum 32 and returning axially by the rear flange 42 and on the other hand by air currents Ff exiting radially by the side wall 40 of the drum 32 and returning axially through the front flange 41. These rotating fins 43 also constitute means creating a third movement or air flow Fm around the drum 32 in the direction of rotation of the latter, formed by a mixture of current of air Fa and Ff. Before entering the drum 32, the air streams Fa and Ff are respectively heated by heating means 45 and 46 when they are constituted by electric heating resistors. When these heating means 45 and 46 are constituted by infrared sources of a known type, the wet linen is directly heated by these sources while the air currents Fa and Ff do not undergo an appreciable influence from these sources.

Le sèche linge 30 comprend dans sa partie inférieure, au-dessous du tambour 32, un condenseur 48 qui assure une condensation et une évacuation progressive de l'humidité extraite du linge transportée par le courant Fm d'air ou mélange d'air Fa et Ff chargé d'humidité sortant du tambour à linge 32.The dryer 30 comprises in its lower part, below the drum 32, a condenser 48 which provides condensation and a progressive evacuation of the moisture extracted from the linen transported by the current Fm of air or air mixture Fa and Ff charged with moisture leaving the laundry drum 32.

Dans l'exemple illustré aux figures 3 et 4, le condenseur 48 qui est un condenseur à refroidissement à air envoyé par une soufflante 49 du type à turbine tangentielle comprend d'une part des ailettes transversales parallèles de condensation 50 en saillie vers l'intérieur du sèche linge 30 et orthogonales à l'axe horizontal 52 de rotation du tambour à linge 32, et d'autre part des ailettes longitudinales parallèles de refroidissement 53, en saillie vers l'extérieur du sèche linge 30 et orientées parallèlement à la direction de l'air de refroidissement envoyé par la soufflante 49.In the example illustrated in FIGS. 3 and 4, the condenser 48 which is an air-cooled condenser sent by a blower 49 of the tangential turbine type comprises on the one hand parallel transverse fins of condensation 50 projecting inwards of the dryer 30 and orthogonal to the horizontal axis 52 of rotation of the laundry drum 32, and on the other hand parallel longitudinal cooling fins 53, projecting outwards from the dryer 30 and oriented parallel to the direction of the cooling air sent by the blower 49.

Au cours d'un fonctionnement du sèche linge 30, le tambour à linge 32 tourne, ses nervures 55 soulèvent le linge humide et l'exposent à l'air circulant dans ce tambour, qui prélève de l'humidité du linge, ses ailettes 43 créent d'une part des mouvements ou courants symétriques d'air Fa et Ff constitués par une sortie radiale de l'air chaud chargé d'humidité prélevée du linge par les trous 39 de la paroi latérale 40 du tambour dans l'espace entourant ce tambour, et une rentrée dans ce tambour à travers les trous 39 des flasques 41, 42, de l'air dans cet espace, réchauffé par des moyens chauffants 45, 46, quand ces moyens chauffants sont constitués par des résistances électriques chauffantes et d'autre part un mouvement ou courant d'air chaud chargé d'humidité Fm (issu d'un mélange d'air chaud et humide Fa et Ff) autour du tambour 32, et forcent cet air chaud chargé d'humidité Fm à entrer en contact avec les ailettes de condensation 50 du condenseur 48. L'humidité extraite du linge est ainsi condensée et évacuée vers l'extérieur du sèche linge 30 par une conduite non représentée ou stockée dans un bac de réception amovible non représenté. Pour éviter une perte sensible d'énergie thermique émise par les moyens chauffants 45, 46, des plaquettes isolantes 56, 57 sont montées entre ces derniers et des parois de la carrosserie 31 adjacentes.During an operation of the dryer 30, the laundry drum 32 rotates, its ribs 55 lift the wet laundry and expose it to the air circulating in this drum, which takes moisture from the laundry, its fins 43 create on the one hand symmetrical movements or streams of air Fa and Ff constituted by a radial outlet of the hot air charged with moisture taken from the laundry by the holes 39 of the side wall 40 of the drum in the space surrounding this drum, and reentry into this drum through the holes 39 of the flanges 41, 42, of air in this space, heated by heating means 45, 46, when these heating means are constituted by electric heating resistors and on the other hand, a movement or current of hot air charged with humidity Fm (coming from a mixture of hot and humid air Fa and Ff) around the drum 32, and force this hot air charged with humidity Fm to come into contact with the condenser fins 50 of the condenser 48. The humi Dity extracted from the laundry is thus condensed and discharged to the outside of the dryer 30 by a pipe not shown or stored in a removable receptacle not shown. To avoid a significant loss of thermal energy emitted by the heating means 45, 46, insulating plates 56, 57 are mounted between the latter and walls of the adjacent bodywork 31.

Selon une deuxième variante de réalisation, schématiquement illustrée dans les figures 5 et 6, un sèche linge 58 comprend une carrosserie 59 analogue à celle 31 de la première variante, de préférence thermiquement isolante, et comportant une ouverture frontale d'accès 60 et un condenseur 61 à refroidissement par air envoyé par une soufflante à turbine 62 dans la partie inférieure de la carrosserie, au-dessous du tambour à linge 65. Le condenseur 61 est pourvu d'ailettes de condensation 63 parallèles, orthogonales à l'axe de rotation 66 du tambour, en saillie vers l'intérieur de la carrosserie 59 et d'ailettes de refroidissement 64, parallèles, en saillie vers l'extérieur du sèche linge 58. Le sèche linge 58 comprend un tambour à linge 65 tournant autour d'un axe horizontal 66.According to a second alternative embodiment, diagrammatically illustrated in FIGS. 5 and 6, a dryer 58 comprises a bodywork 59 similar to that 31 of the first variant, preferably thermally insulating, and comprising a front access opening 60 and a condenser 61 with air cooling sent by a turbine blower 62 in the lower part of the body, below the laundry drum 65. The condenser 61 is provided with condensation fins 63 parallel, orthogonal to the axis of rotation 66 drum, projecting towards the inside of the body 59 and cooling fins 64, parallel, projecting towards the outside of the dryer 58. The dryer 58 comprises a laundry drum 65 rotating about an axis horizontal 66.

Des moyens de création d'une dépression et d'un appel d'air à l'intérieur du tambour à linge 65 ou moyens de création des courants d'air sont constitués d'une part par une couronne d'ailettes longitudinales, espacées, parallèles 72 tournant concentriquement autour de ce tambour à linge 65 et d'autre part par des trous ou perforations 67 à la fois dans la paroi latérale 68 et dans les flasques arrière 69 et frontal 70 de ce tambour 65. Lors d'un fonctionnement du sèche linge 58, le tambour à linge 65 tourne à une vitesse de l'ordre de 50 tours/minute, soulève le linge humide par ses nervures 73 et l'expose à l'air circulant dans le tambour, et la couronne d'ailettes parallèles 72 tourne à une vitesse de l'ordre de 500 tours/minute concentriquement à ce tambour 65 et crée à travers les parois latérale 68 et flasques 69, 70 munis de trous ou perforations 67, une dépression à l'intérieur de ce tambour 65 engendrant deux mouvements ou courants d'air Fa et Ff symétriques par rapport à un plan transversal médian 74 du tambour à linge 65 formés de courants d'air chaud chargé d'humidité extraite du linge Fa, Ff sortant radialement de ce tambour à travers la paroi latérale 68 et de courants d'air Fa, Ff réchauffé par les moyens chauffants 76, 77 quand ces moyens sont constitués par des résistances électriques chauffantes, rentrant axialement dans ce tambour à travers les flasques 69, 70. Cette couronne d'ailettes 72 en rotation constitue également des moyens créant dans l'espace entourant le tambour à linge 65 et la couronne d'ailettes 72, un mouvement ou courant d'air Fm formé d'un mélange d'air chaud chargé d'humidité extraite du linge Fa, Ff de manière que ce mélange d'air chaud chargée d'humidité soit forcé à entrer en contact avec les ailettes de condensation 63 du condenseur 61 et y débarrasser son humidité. Durant l'opération de séchage, l'humidité extraite du linge à sécher dans le tambour 65 est ainsi progressivement piégée dans ce condenseur 61, et évacuée à l'extérieur du sèche linge par des moyens connus non représentés. Quand les moyens chauffants 76, 77 sont constitués par des sources de rayonnement infrarouge, le linge humide est directement réchauffée par ces sources, à travers les perforations du tambour, tandis que l'air dans l'espace entourant le tambour 65 ne subit pas une influence appréciable de ces sources.Means for creating a vacuum and a draft of air inside the laundry drum 65 or means for creating air currents are formed on the one hand by a ring of spaced apart longitudinal fins, parallel 72 rotating concentrically around this laundry drum 65 and on the other hand by holes or perforations 67 both in the side wall 68 and in the rear 69 and front flanges 70 of this drum 65. During operation of the tumble dryer 58, the laundry drum 65 rotates at a speed of the order of 50 revolutions / minute, lifts the damp laundry by its ribs 73 and exposes it to the air circulating in the drum, and the crown of fins parallel 72 rotates at a speed of the order of 500 revolutions / minute concentrically with this drum 65 and creates through the side walls 68 and flanges 69, 70 provided with holes or perforations 67, a depression inside this drum 65 generating two movements or air currents Fa and Ff symé triques with respect to a median transverse plane 74 of the laundry drum 65 formed by streams of hot air charged with moisture extracted from the laundry Fa, Ff emerging radially from this drum through the side wall 68 and by streams of air Fa, Ff heated by the heating means 76, 77 when these means are constituted by electric heating resistors, entering axially in this drum through the flanges 69, 70. This ring of fins 72 in rotation also constitutes means creating in the space surrounding the laundry drum 65 and the ring of fins 72, a movement or stream of air Fm formed of a mixture of hot air charged with humidity extracted from the linen Fa, Ff so that this mixture of hot air charged with humidity is forced to come into contact with the condensation fins 63 of the condenser 61 and to get rid of its humidity there. During the drying operation, the moisture extracted from the laundry to be dried in the drum 65 is thus gradually trapped in this condenser 61, and discharged outside the dryer by known means not shown. When the heating means 76, 77 are constituted by sources of infrared radiation, the wet linen is directly heated by these sources, through the perforations of the drum, while the air in the space surrounding the drum 65 does not undergo a significant influence from these sources.

Selon une variante de réalisation non représentée, le condenseur à refroidissement à l'air 61, 62 est remplacé par des moyens créant un courant Fe d'air venant de l'extérieur, traversant l'appareil par l'espace entourant le tambour à linge analogues aux moyens 22, 23, 24 de l'exemple illustré dans les figures 1 et 2.According to a variant embodiment not shown, the air-cooled condenser 61, 62 is replaced by means creating a current Fe of air coming from outside, passing through the device through the space surrounding the laundry drum analogous to means 22, 23, 24 of the example illustrated in FIGS. 1 and 2.

Dans l'exemple illustré aux figures 5 et 6, la couronne d'ailettes 72 est formée d'ailettes longitudinales espacées 79. Ces ailettes sont parallèles soit aux génératrices du tambour à linge 65, soit aux hélices choisies sur la paroi latérale 68 de ce tambour, et assemblées en une couronne pour être fixées sur un support rotatif 80 coaxial à ce tambour et muni de bras radiaux 81. La couronne d'ailettes 72 est entraînée en rotation par un moteur électrique 83 à travers une courroie 84 et le tambour à linge 65 est à son tour entraîné en rotation par cette couronne d'ailettes 72 à travers un système connu réducteur de vitesse 85. Le tambour à linge 65 et la couronne d'ailettes 72 sont de préférence respectivement soutenus en position horizontale, au niveau de leurs bords frontaux, par des jeux de galets libres en rotation 86, 87 portés par des supports fixes 88 et un ou plusieurs supports pivotants de serrage 89. Pour éviter une perte sensible d'énergie thermique émise par les moyens chauffants 76, 77 des plaquettes thermiquement isolantes 91, 92 sont montées entre ces derniers et des parois de la carrosserie 9 adjacentes.In the example illustrated in FIGS. 5 and 6, the ring of fins 72 is formed of spaced longitudinal fins 79. These fins are parallel either to the generators of the laundry drum 65, or to the propellers chosen on the side wall 68 of this drum, and assembled in a ring to be fixed on a rotary support 80 coaxial with this drum and provided with radial arms 81. The ring of fins 72 is rotated by an electric motor 83 through a belt 84 and the drum laundry 65 is in turn driven in rotation by this ring of fins 72 through a known speed reduction system 85. The laundry drum 65 and the ring of fins 72 are preferably respectively supported in a horizontal position, at the level of their front edges, by sets of free rotating rollers 86, 87 carried by fixed supports 88 and one or more pivoting clamping supports 89. To avoid a significant loss of thermal energy emitted by the heating means 76, 77 of the thermally insulating plates 91, 92 are mounted between the latter and adjacent body walls 9.

Dans un autre exemple de réalisation illustré dans la figure 7, un sèche-linge 100 comprend une carrosserie 101 de préférence thermiquement isolante et comportant une ouverture de chargement par le dessus 102 et un condenseur 104 à refroidissement par air envoyé par une soufflante à turbine 105 dans la partie inférieure de la carrosserie au-dessous d'un tambour à linge 106 tournant autour d'un axe horizontal 108 et pourvu d'une ouverture d'accès 114, fermée par une porte 115.In another exemplary embodiment illustrated in FIG. 7, a dryer 100 comprises a body 101 preferably thermally insulating and comprising a top loading opening 102 and a condenser 104 with air cooling sent by a turbine blower 105 in the lower part of the body below a laundry drum 106 rotating around a horizontal axis 108 and provided with an access opening 114, closed by a door 115.

Des moyens de création d'une dépression et d'un appel d'air à l'intérieur du tambour à linge 106 ou moyens de créations des courants d'air comprennent d'une part des trous ou perforations 109 à la fois dans la paroi latérale 110 et dans les flasques arrière 111 et frontal 112 de ce tambour à linge 106, d'autre part des ailettes parallèles longitudinales ou en hélice 118 formées sur la paroi latérale extérieure 110 de ce tambour 106. Ces ailettes 118 créent durant la rotation dun tambour 106 une dépression et un appel d'air à l'intérieur de ce dernier, engendrant d'une part deux mouvements ou courants d'air Fa et Ff symétriques par rapport à un plan transversal médian 120 de ce tambour 106, l'un formé par des courants d'air Fa sortant radialement par la paroi latérale 110 du tambour 106 et rentrant axialement par le flasque arrière 111, et l'autre par des courants d'air Ff sortant radialement par la paroi latérale 110 du tambour 106 et rentrant axialement par le flasque frontal 112, et d'autre part un troisième mouvement ou courant d'air Fm autour de ce tambour 106 dans le sens de rotation de ce dernier, formé, par un mélange d'une partie de ces courants d'air Fa et Ff. Avant leur rentrée dans le tambour 106, à travers les flasques arrière 111 et frontal 112, les courants d'air Fa et Ff sont respectivement réchauffés par des moyens chauffants 121 et 122 lorsque ceux-ci sont constitués par des résistances électriques chauffantes. Quand ces moyens chauffants 121 et 122 sont constitués par des sources d'infra-rouge d'un type connu, le linge humide dans le tambour 106 est directement réchauffé par ces sources tandis que les courants d'air Fa et Ff ne subissent pas une influence appréciable de ces sources. Des plaquettes thermiquement isolantes 128, 129 sont montées entre les moyens de chauffants 121, 122 et les parois de la carrosserie 101.Means for creating a vacuum and an air draw inside the laundry drum 106 or means for creating air currents comprise, on the one hand, holes or perforations 109 both in the wall lateral 110 and in the rear flanges 111 and front 112 of this laundry drum 106, on the other hand, longitudinal or helical parallel fins 118 formed on the outer lateral wall 110 of this drum 106. These fins 118 create during the rotation of a drum 106 a depression and an air draw inside the latter, generating on the one hand two movements or air currents Fa and Ff symmetrical with respect to a median transverse plane 120 of this drum 106, one formed by air currents Fa radially exiting through the side wall 110 of the drum 106 and returning axially by the rear flange 111, and the other by air currents Ff exiting radially through the side wall 110 of the drum 106 and returning axially by l e front flange 112, and on the other hand a third movement or air flow Fm around this drum 106 in the direction of rotation of the latter, formed by a mixture of part of these air currents Fa and Ff. Before entering the drum 106, through the rear flanges 111 and front 112, the air currents Fa and Ff are respectively heated by heating means 121 and 122 when these are constituted by electric heating resistors. When these heating means 121 and 122 are constituted by infrared sources of a known type, the damp linen in the drum 106 is directly heated by these sources while the air currents Fa and Ff do not undergo an appreciable influence from these sources. Thermally insulating plates 128, 129 are mounted between the heating means 121, 122 and the walls of the body 101.

Le condenseur 104 qui, se trouvant dans la partie inférieure du sèche- linge 100, en dessous du tambour 106, et ayant des ailettes des condensation 130 en saillie à l'intérieur de la carrosserie 101 et disposées orthogalement à l'axe de rotation 108 de ce tambour 106 et des ailettes de refroidissement 131 en saillie à l'extérieur, assure une condensation et une évacuation progressive de l'humidité extraite du linge transportée par le courant Fm d'air, chargé d'humidité sortant du tambour à linge 106. Le tambour à linge 106 est maintenu en position horizontale par deux jeux de galets frontaux 135 et arrière 136 et entraîné en rotation par un moteur électrique 137 à travers un système de transmission 138 à galet de friction 139.The condenser 104 which, being located in the lower part of the dryer 100, below the drum 106, and having condensation fins 130 projecting inside the body 101 and arranged orthogally to the axis of rotation 108 of this drum 106 and of the cooling fins 131 projecting from the outside, ensures a condensation and a progressive evacuation of the moisture extracted from the laundry transported by the current Fm of air, charged with moisture leaving the laundry drum 106 The laundry drum 106 is held in a horizontal position by two sets of front 135 and rear 136 rollers and rotated by an electric motor 137 through a transmission system 138 with friction roller 139.

Les mouvements ou courants d'air symétriques Fa, Ff engendrés par les moyens de création d'une dépression et d'un appel d'air à l'intérieur du tambour à linge décrits ci-dessus permettent de mettre efficacement l'air au contact du linge humide soumis au séchage, d'éviter des trajets non utilisés d'air à travers le tambour à linge, dus à un manque de contact avec le linge humide notamment quand ce linge humide est en faible quantité, d'accélérer l'extraction de l'humidité du linge humide, et de réaliser ainsi une appréciable économie par rapport à une opération de séchage du linge humide dans un sèche linge connu où le courant d'air de séchage traverse le tambour à linge seulement dans un sens transversal autrement dit entre dans le tambour à travers une partie de sa paroi latérale et sort de ce tambour à travers une partie de sa paroi latérale de ce tambour.The symmetrical movements or air currents Fa, Ff generated by the means for creating a vacuum and a call for air inside the laundry drum described above make it possible to effectively bring the air into contact damp laundry subjected to drying, to avoid unused paths of air through the laundry drum, due to a lack of contact with damp laundry, especially when this wet laundry is in small quantity, to accelerate the extraction humidity of the wet laundry, and thus achieve an appreciable saving compared to a drying operation of the wet laundry in a known dryer where the stream of drying air passes through the laundry drum only in a transverse direction, in other words enters the drum through a part of its side wall and leaves this drum through a part of its side wall of this drum.

Dans les moyens de création d'une dépression et d'un appel d'air à l'intérieur du tambour à linge ou moyens de création de courants d'air, dans les exemples des figures 1 à 7, les ailettes espacées parallèles sont soit des ailettes courbes, soit des ailettes droites radiales c'est-a-dire perpendiculaires aux tangentes au tambour à leurs points de projection sur ce dernier, soit des ailettes droites inclinées rapport aux directions radiales de ce tambour, autrement dit formant un angle alpha avec les directions radiales ou ces tangentes au tambour à leurs points de projection sur ce dernier.In the means of creating a depression and a call of air inside the laundry drum or means of creating air currents, in the examples of FIGS. 1 to 7, the parallel spaced fins are either curved fins or straight radial fins, that is to say a - say perpendicular to the tangents to the drum at their projection points on the latter, either inclined straight fins relative to the radial directions of this drum, in other words forming an angle alpha with the radial directions or these tangents to the drum at their projection points on this last.

Dans le cas où les moyens chauffants sont constitués par des sources de rayonnement infrarouge, la chaleur de vaporisation nécessaire à l'évaporation de l'eau retenue par la charge en linge soumise au séchage est apportée directement à la surface humide de ce linge sécher, et le transfert de chaleur entre la source chauffante et la charge en linge humide ne dépend pas du coefficient de remplissage du tambour. Par ailleurs, dans les mouvements ou courants d'air à l'intérieur de l'appareil peuvent se distinguer une boucle d'air de circulation à gros débit et une boucle d'air d'évacuation ou de déshumidification à faible débit. La boucle d'air de circulation à gros débit permet d'obtenir des vitesses élevées de passage d'air, d'améliorer ainsi les coefficients d'échange thermique et de contribuer en conséquence avec la boucle d'air d'évacuation d'humidité à faible débit, pour obtenir efficacement une absence de rejet à l'extérieur de l'appareil d'énormes quantités d'air chaut et humide, et en même temps un bon rendement, par une absence de rejet à l'extérieur de l'appareil de l'air chaud humide non saturé, grâce à une aptitude de l'appareil à régler, indépendamment l'un de l'autre, le débit de la boucle d'air de circulation et le débit de la boucle d'air d'évacuation d'humidité ou de déshumidification.In the case where the heating means are constituted by sources of infrared radiation, the heat of vaporization necessary for the evaporation of the water retained by the load of linen subjected to drying is brought directly to the wet surface of this linen to dry, and the heat transfer between the heating source and the load in wet linen does not depend on the filling coefficient of the drum. In addition, in the movements or air currents inside the device can be distinguished a loop of circulating air at high flow and a loop of exhaust air or dehumidification at low flow. The high flow circulating air loop allows high air passage speeds to be obtained, thereby improving the heat exchange coefficients and contributing accordingly with the humidity exhaust air loop at low flow rate, to effectively obtain an absence of rejection outside the apparatus of enormous quantities of hot and humid air, and at the same time a good performance, by an absence of rejection outside of the unsaturated moist hot air apparatus, thanks to the ability of the apparatus to regulate, independently of one another, the flow rate of the circulating air loop and the flow rate of the air loop d evacuation of humidity or dehumidification.

En outre, les moyens de création d'une dépression et d'un appel d'air à l'intérieur du tambour à linge ou moyens de création de courants d'air décrits ci-dessus tournent beaucoup plus lentement qu'un groupe moto-ventilateur des appareils connus, d'où un faible niveau de bruit de fonctionnement de l'appareil est enregistré.In addition, the means for creating a vacuum and an air draw inside the laundry drum or means for creating air currents described above rotate much slower than a power unit. ventilator of known devices, hence a low level of operating noise of the device is recorded.

Une structure relativement simple de l'appareil décrit ci-dessus permet d'atteindre un coût industriel bas sans compromettre la fiabilité de l'appareil fabriqué.A relatively simple structure of the apparatus described above achieves a low industrial cost without compromising the reliability of the manufactured device.

Claims (16)

  1. An apparatus with a perforated rotating drum for drying laundry by means of circulating air which enters through a flask in the drum and which leaves the apparatus through the lateral wall of the latter, characterized in that it comprises at least means (12, 43, 72, 118) which create, by an air outlet flow from this drum (3) through its lateral wall (8) , a depression inside the drum (3) and an air suction flow into this drum (3) through its frontal and rear flasks (9, 10) and through its lateral wall (8) , thereby creating two symmetrical air flows (Fa, Ff) with respect to its central cross plane (14), one flow (Fa) being output radially through the lateral wall and being admitted axially by the rear flask, while the other (Ff) is output radially through the lateral wall and is admitted axially by the frontal flask of the drum, and that the apparatus further comprises means creating an air flow (Fm) around the drum.
  2. An apparatus according to claim 1, characterized in that the means creating air flows (Fa, Ff, Fm) in the drum and around the latter comprise on the one hand perforations or holes (7, 109) provided as well in the frontal and rear flasks (9, 10) as in the lateral wall (8) of the drum, and on the other hand ribs (12, 43, 72, 118) which are spaced from each other and are parallelly disposed along the longitudinal direction about said drum (3).
  3. An apparatus according to claim 2, characterized in that in the means creating the air flows (Fa, Ff, Fm), the spaced ribs (12, 43, 72, 118) are straight ribs and are disposed parallelly to the generatrix lines of the laundry drum.
  4. An apparatus according to claim 3, characterized in that in the means creating the air flows (Fa, Ff, Fm) , the spaced ribs (12, 43, 72, 118) are straight ribs and are disposed parallelly to the helical lines selected on the laundry drum.
  5. An apparatus according to one of claims 3 and 4, characterized in that in the means creating the air flows (Fa, Ff, Fm), the spaced ribs (12, 43, 72, 118) are radially disposed ribs with respect to the laundry drum.
  6. An apparatus according to one of claims 3 and 4, characterized in that in the means creating the air flows (Fa, Ff, Fm), the spaced ribs (12, 43, 72, 118) are inclined with respect to the radial directions of the drum.
  7. An apparatus according to one of claims 2 to 6, characterized in that in the means creating the air flows (Fa, Ff, Fm), the spaced parallel ribs (12, 43, 118) are realized on the outer surface of the lateral wall (8, 40, 110) of this drum in the longitudinal direction of the latter.
  8. An apparatus according to one of claims 2 to 6, characterized in that in the means creating the air flows (Fa, Ff, Fm), the ribs constitute an annular rib arrangement (72) which rotates concentrically about the laundry drum (65).
  9. An apparatus according to claim 8, characterized in that in the means creating the air flows (Fa, Ff, Fm), the annular rib arrangement (72) is fixed to a rotating support (80) which is coaxial to the drum (65) and is supplied with radial arms (81).
  10. An apparatus according to one of claims 1 to 9, characterized in that it comprises means (22, 23, 24) creating an air flow (Fe) from the outside which flow passes through the apparatus in the space surrounding the laundry drum (3, 32, 65).
  11. An apparatus according to claim 10, characterized in that, in order to establish an air flow (Fe) which passes through the apparatus, the latter comprises inlet openings (23) realized in the lower part of the rear wall of the chassis (2), outlet openings (24, 25) realized in the upper part of the front wall of the chassis (2) and a fan (22) sucking air from the outside (Fe) into the apparatus through the inlet openings (23) and rejecting a mixture of inside air (Fa, Ff) and outside air (Fe) to the outside of the apparatus through the outlet openings (24, 25).
  12. An apparatus according to one of claims 8 and 9, characterized in that it comprises a laundry drum (65) and an annular arrangement of longitudinal spaced ribs (72) provided at the level of their frontal edges with sets of idle rollers (86, 87) which maintain the arrangement in a horizontal position.
  13. An apparatus according to one of claims 9 and 12, characterized in that the annular rib arrangement (72) which is fixed to a rotating support (80) coaxially to the laundry drum (65) is rotatively driven by an electric motor (83) via a drive belt (84) while the laundry drum (65) is driven by said rib arrangement (72) through a speed reduction system (85).
  14. An apparatus according to one of claims 1 to 9, characterized in that it comprises in the lower part of the chassis (31, 59, 101) and below the laundry drum (32, 65, 106), an air-cooled condenser (48, 61, 104), which comprises condensation ribs (50, 63, 110) projecting to the inside of the chassis (31, 59, 101) and disposed perpendicularly to the axis of rotation (52, 66, 108) of the laundry drum (32, 65, 106) , and cooling ribs (53, 64, 131) which project to the outside.
  15. An apparatus according to claim 1, characterized in that it comprises heating means (15, 16, 45, 46, 76, 77, 121, 122) selected among the electric resistance heaters and the infrared radiating sources.
  16. An apparatus according to claim 15, characterized in that it comprises thermally isolating panels (19, 20, 56, 57, 91, 92, 128, 129) which are mounted between the heating means (15, 16, 45, 46, 76, 77, 121, 122) and the adjacent walls of the chassis (2, 31, 59, 101).
EP87402318A 1986-10-20 1987-10-16 Apparatus with a rotating drum for drying laundry by means of air circulation Expired - Lifetime EP0265332B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402318T ATE65558T1 (en) 1986-10-20 1987-10-16 DEVICE WITH ROTARY DRUM FOR DRYING LAUNDRY BY AIR CIRCULATION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8614526A FR2605337B1 (en) 1986-10-20 1986-10-20 DRYING ROTARY DRUM APPARATUS BY AIR CIRCULATION.
FR8614526 1986-10-20

Publications (2)

Publication Number Publication Date
EP0265332A1 EP0265332A1 (en) 1988-04-27
EP0265332B1 true EP0265332B1 (en) 1991-07-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402318A Expired - Lifetime EP0265332B1 (en) 1986-10-20 1987-10-16 Apparatus with a rotating drum for drying laundry by means of air circulation

Country Status (6)

Country Link
EP (1) EP0265332B1 (en)
AT (1) ATE65558T1 (en)
DE (1) DE3771644D1 (en)
ES (1) ES2023925B3 (en)
FR (1) FR2605337B1 (en)
GR (1) GR3002364T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664626B1 (en) * 1990-07-10 1994-07-29 Ciapem DRYER.
FR2668585A1 (en) * 1990-10-30 1992-04-30 Ciapem HEAT EXCHANGER SYSTEM WITH ADJUSTABLE POWER AND APPARATUS PROVIDED WITH SUCH A SYSTEM.
FR2671112A1 (en) * 1990-12-28 1992-07-03 Ciapem Drum-type laundry dryer, the cylindrical wall of which is perforated
CN101684606B (en) * 2008-09-26 2011-11-09 博西华电器（江苏）有限公司 Household clothes drying device
DE102015107111A1 (en) * 2015-05-07 2016-11-10 Miele & Cie. Kg A laundry treating machine, air duct assembly for a laundry treating machine and cover member for an air duct assembly for a laundry treating machine
GB2564669A (en) * 2017-07-18 2019-01-23 Xeros Ltd Improved drying methods

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT190024B (en) * 1955-03-05 1957-05-25 Willy Buescher Drying machine
CH240775A (en) * 1944-05-01 1946-01-31 Rotz Albert Von Laundry drying machine.
US2543579A (en) * 1946-03-22 1951-02-27 Lovell Mfg Co Drier
DE7336849U (en) * 1973-10-12 1974-03-28 Licentia Gmbh Laundry treatment machine that works according to the drum principle and is set up for drying
DD137472A1 (en) * 1978-06-27 1979-09-05 Johannes Berger DRUM DRYER

Also Published As

Publication number Publication date
EP0265332A1 (en) 1988-04-27
ES2023925B3 (en) 1992-02-16
FR2605337A1 (en) 1988-04-22
DE3771644D1 (en) 1991-08-29
ATE65558T1 (en) 1991-08-15
GR3002364T3 (en) 1992-12-30
FR2605337B1 (en) 1989-05-26

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