EP1475474B1 - Machine à sécher le linge avec agencement perfectionné de ventilateur - Google Patents
Machine à sécher le linge avec agencement perfectionné de ventilateur Download PDFInfo
- Publication number
- EP1475474B1 EP1475474B1 EP04009650A EP04009650A EP1475474B1 EP 1475474 B1 EP1475474 B1 EP 1475474B1 EP 04009650 A EP04009650 A EP 04009650A EP 04009650 A EP04009650 A EP 04009650A EP 1475474 B1 EP1475474 B1 EP 1475474B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- air
- vanes
- flow
- drying
- 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
Links
- 238000001035 drying Methods 0.000 title claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000005406 washing Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 230000002441 reversible effect Effects 0.000 description 11
- 230000009467 reduction Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
Definitions
- the present invention refers to an improved kind of clothes drying machine, preferably of the type for use in households, which is particularly quiet, i.e. low-noise in operation.
- Clothes drying machines are largely known in the art to generally operate according to different principles and modes, including the condenser mode, i.e. the operation based on the condensation of the moisture contained in a stream of drying air that is first blown through the drum, where it removes moisture from the clothes contained therein, and flows eventually out of the same drum and into the condenser, and the exhaust mode, in which said flow of moisture-laden hot air is exhausted as such outside the machine.
- the condenser mode i.e. the operation based on the condensation of the moisture contained in a stream of drying air that is first blown through the drum, where it removes moisture from the clothes contained therein, and flows eventually out of the same drum and into the condenser
- the exhaust mode in which said flow of moisture-laden hot air is exhausted as such outside the machine.
- a heating element which, when appropriately energized, heats up the air that flows over it as blown by said blower, so that air is let into the drum which is sufficiently hot to cause the moisture contained in the clothes to evaporate.
- the hot air causes the moisture contained in the clothes to evaporate and becomes almost saturated, or even fully saturated, with this evaporated moisture.
- the resulting hot, moisture-laden air is then forced further by said blower to create a continuous flow that is conveyed into and through an appropriate condensation arrangement, which is usually formed by a heat-exchanger that is flown through - along the so-called "hot path” - by said stream of hot moisture-laden air and - along the so-called “cold path” - by a substantially continuous stream of air taken in from the surrounding ambient and exhausted again into the same surrounding ambient upon having so flown across said heat exchanger.
- the noise generated by the fan in the cooling air conduit during the main operating mode is rather high, amounting for instance to about 67 dB, while however sustaining a flow rate of approx. 200 m 3 /hr, whereas the same noise lowers, for instance down to approx. 63 dB, during the reverse operating mode, when a lower flow rate of approx. 80 m 3 /hr is anyway sustained (the above-noted values are merely indicative).
- the different noise generation pattern of the two kinds of vanes is best illustrated by the two graphs appearing in the attached Figures 1 and 2, in which the first graph shows the noise generation pattern of the vanes according to the prior art, whereas the second graph illustrates the corresponding noise generation pattern of the above-mentioned "inverted" vanes.
- Figure 3 shows a graph illustrating both the flow rate P of condensed moisture and the temperature T of the air leaving the drum versus the time elapsed from the beginning of the drying process.
- a domestic tumble dryer provided with a fan for cooling a condensing device.
- the air inlet of the fan is provided with a static deflector comprising radial blades, which cause the streams of air suctioned in to rotate which silences the operation.
- a drum 1 adapted to hold the clothes to be dried, to which there is associated a conduit 2 for the drying air to be circulated therethrough; this conduit extends to also pass through a condenser arrangement 3 that is adapted to condense the moisture contained in the air circulating therethrough, said condenser being flown through by a stream of "cold" air, i.e. air that is taken in from the surrounding ambient and sent to said condenser 3 via a corresponding conduit 4.
- a stream of "cold" air i.e. air that is taken in from the surrounding ambient and sent to said condenser 3 via a corresponding conduit 4.
- Both conduits 2 and 4 contain respective fans 5 and 6 thereinside to bring about the respective streams of drying and cooling air; furthermore, the shafts of said two fans 5 and 6 are connected in a generally known manner, even via appropriate kinematical links, to a single drive motor 7, so that the rotation of this motor will cause said to fans to correspondingly rotate in a synchronous manner, wherein said motor 7 is controlled by suitable control means (not shown) that are adapted to cause it to selectively rotate in the two possible directions of rotation, and this obviously enables said two fans to be in turn caused to rotate in a selective, but anyway mutually consistent manner (wherein by "mutually consistent” is meant that, when a first fan rotates in a definite direction, the second fan unchangingly rotates in a single and same direction of its own; and when the direction of rotation of said first fan is reversed, the second fan will change its own direction of rotation, too).
- Said cooling air fan is usually enclosed in a casing generally known as "scroll", whose shape is such as to enable the air being blown by said fan to be effectively used and directed into the conduit leading to the condenser under as small as possible an efficiency loss.
- the motor driving the fan can also be used, via suitable motion transmission means, to rotatably drive also the clothes-holding drum and it is actually a common practice, in this connection, to let this motor be operated for short periods of time in the normal, or main, direction of rotation, said periods being alternated with other short periods of time, in which it rotates in the reverse, or secondary, direction.
- the condenser cooling fan is usually of the so-called "tangential" type, i.e. it is made in the shape of a hollow geometrical cylinder , in which the side cylindrical surface is traversed by a multiplicity of vanes 9, which are variously curved, i.e. concave or convex, with respect to the tangent being projected in the direction of rotation; as already stated hereinbefore, the simple curvature of the vanes brings about an excessive noise generation, which is however modified when switching over from the main mode of operation to the reverse or secondary one, thereby creating the possibility of reducing the average amplitude of the noise through a shorter duration of the period of reverse operation.
- the period of reverse operation is shortened, at a level of noise of 70 dB, and all other conditions remaining unaltered the average amplitude of the same noise is certainly reduced.
- the fan 6, has been provided, further to said first vanes 9 arranged radially with respect to the axis of the cylinder that is substantially defined by them, with an additional plurality of second vanes 10, wherein these are arranged between said axis X of said hollow geometrical cylinder and the related outside cylindrical surface or, more precisely, between the intersection point 0 of said axis X with one of the two bases of said cylinder, and that portion 11 of the outside surface of said geometrical cylinder which lies adjacent to said base, indicated symbolically at 12, as this is most clearly illustrated in Figures 5 to 10.
- Said second vanes 10 are themselves arranged radially, in the sense that they project in a fan-like wise from said central point 0, from which they diverge.
- said second vanes 10 are represented in the form of curved surfaces (they are fluted surfaces, i.e. a particular case of curved surfaces), whose front or rear projection, however, looks as a corresponding plurality of similar triangles having a vertex at said point 0, as exemplified in Figures 7 and 8.
- said vanes are represented in the form of curved triangular surfaces that are substantially inclined with respect to the plane containing said base 12.
- said second vanes 10 may take other forms, e.g. they may be petal-shaped or be given the shape of screw blades, wherein they must in all cases feature an overall geometrical configuration such that, when the fan 9 rotates in a given direction, said second vanes will taken in air axially from the outside ambient, through the section of the cylinder that is indicated symbolically at 13 and lies on the opposite side with respect to said base 12; in other words, in this direction of rotation said second vanes take in the outside air axially and cause it to flow into the geometrical cylinder, so that this air will eventually be more easily taken in and pushed by said first vanes 9 tangentially thereto.
- said second fan is used as the cooling air fan 6 and is mounted so that, during the secondary operating mode, it generates not only the least air flow, but also the least noise, and if the duration of said secondary operation periods is at the same time shortened, then the targeted aim is fully reached, since no need actually arises for the condenser to be cooled down during the initial phases of the drying process, when condensation is in fact still limited owing to the drying air temperature not having reached any adequately high value yet, whereas the slight loss in condensation efficiency incurred as the drying process progresses can be readily compensated for by said shortened duration of the secondary operation periods, so that the overall ultimate result is not affected at all.
- the cooling air fan is allowed to alternately rotate in the two opposite directions of rotation, according to programme sequences that are already known as such in the art and designed so as to enable an effective condensation process to take place during the main operating mode of the cooling air fan, whereas the secondary operating mode thereof is selected so as to be as short as possible and is anyway allowed to be carried out to the sole purpose of disentangling clothes that may in the meantime have rolled up into a ball.
- Figure 11 shows two distinct graphs indicating the temperature pattern of the drying air with a cooling fan of a prior-art kind alternately rotating in both directions, i.e. operating alternately in both its main and secondary modes since the beginning (curve A), and with a cooling fan according to the present invention rotating only in its secondary direction of rotation, i.e. operating in its sole secondary operating mode during the initial phase of the drying process (curve B), respectively.
- the function itself of the cooling air fan shall therefore be capable of being controlled selectively both through appropriate commands that may be imparted via external control means and on the basis of other parameters, such as for instance time, temperature or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Drying Of Solid Materials (AREA)
Claims (4)
- Machine à sécher le linge, ou machine combinée à laver et sécher le linge, comprenant un tambour (1) pour contenir le linge à sécher, un premier ventilateur (5) adapté pour insuffler un premier courant d'air de séchage à travers ledit tambour, un condenseur (3) à travers lequel ledit courant d'air de séchage est forcé de passer, un conduit d'air de refroidissement (4) transportant un deuxième courant d'air frais à travers ledit condenseur (3), ledit deuxième courant d'air étant créé par un deuxième ventilateur (6) associé audit conduit d'air de refroidissement (4), ledit deuxième ventilateur comprenant une pluralité de premières pales planes (9) qui paraissent comme disposées sur une surface d'un cylindre radialement par rapport à l'axe (X) dudit cylindre, ledit axe constituant également l'axe de rotation dudit deuxième ventilateur (6), un moteur (7) qui est adapté pour tourner sélectivement dans une direction principale pendant un mode de fonctionnement principal et dans une direction secondaire opposée pendant un mode de fonctionnement secondaire, et pour entraîner conjointement lesdits premier et deuxième ventilateurs (5, 6), caractérisée en ce que ledit deuxième ventilateur (6) comprend également une pluralité de deuxièmes pales (10) qui sont prévues sur une base (12) dudit cylindre, lesdites deuxièmes pales étant agencées radialement, au sens qu'elles dépassent à la manière d'un ventilateur, depuis le centre (O) de ladite base, depuis laquelle elles divergent, lesdites deuxièmes pales (6) étant inclinées par rapport à ladite base (12) afin de créer un écoulement d'air dirigé depuis ladite base (12) vers l'extérieur via l'intérieur dudit cylindre, quand ledit deuxième ventilateur (6) tourne selon ledit mode secondaire.
- Machine à sécher le linge, ou machine combinée à laver et sécher le linge selon la revendication 1, caractérisée en ce que lesdites deuxièmes pales (10) ont une forme choisie pour présenter une saillie triangulaire sur un plan s'étendant parallèlement à ladite base (12).
- Machine à sécher le linge selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est munie de moyens de commande adaptés pour permettre audit moteur (7) de tourner suivant ledit mode de fonctionnement principal et ledit mode de fonctionnement secondaire d'une manière prédéfinissable sélectivement.
- Machine à sécher le linge selon la revendication 3, caractérisée en ce que lesdits moyens de commande sont adaptés pour permettre au moteur de tourner seulement suivant ledit mode secondaire durant le stade initial d'un processus de séchage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200430320T SI1475474T1 (sl) | 2003-05-09 | 2004-04-23 | Gospodinjski stroj za sušenje perila z izboljšano razmestitvijo ventilatorjev |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000015U ITPN20030015U1 (it) | 2003-05-09 | 2003-05-09 | Asciugabiancheria domestica con ventola perfezionata. |
ITPN20030015 | 2003-05-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1475474A1 EP1475474A1 (fr) | 2004-11-10 |
EP1475474B1 true EP1475474B1 (fr) | 2007-03-07 |
Family
ID=33017989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04009650A Expired - Lifetime EP1475474B1 (fr) | 2003-05-09 | 2004-04-23 | Machine à sécher le linge avec agencement perfectionné de ventilateur |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1475474B1 (fr) |
AT (1) | ATE356244T1 (fr) |
DE (1) | DE602004005098T2 (fr) |
ES (1) | ES2283895T3 (fr) |
IT (1) | ITPN20030015U1 (fr) |
SI (1) | SI1475474T1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110965297A (zh) * | 2018-09-27 | 2020-04-07 | 无锡小天鹅电器有限公司 | 衣物处理设备的控制方法 |
CN110965298A (zh) * | 2018-09-27 | 2020-04-07 | 无锡小天鹅电器有限公司 | 衣物处理设备的控制方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666657B1 (fr) | 2004-12-01 | 2012-02-01 | Electrolux Home Products Corporation N.V. | Sèche-linge domestique silencieux |
EP1700944B1 (fr) | 2005-03-08 | 2013-10-23 | Electrolux Home Products Corporation N.V. | Procédé pour la désinfection du linge et sèche-linge domestique avec cycle de désinfection du linge |
ITPN20060004U1 (it) * | 2006-02-15 | 2007-08-16 | Electrolux Home Prod Corp | Asciugabiancheria domestica con doppia ventola. |
DE602007000857D1 (de) * | 2007-02-15 | 2009-05-20 | Electrolux Home Prod Corp | Wäschetrockner mit verbesserter Dampfinjektionsanordnung |
EP2980304B1 (fr) * | 2013-03-28 | 2018-06-27 | Wuxi Little Swan Co. Ltd. | Ventilateur centrifuge et sèche-linge comprenant celui-ci |
CN103225625A (zh) * | 2013-03-28 | 2013-07-31 | 无锡小天鹅股份有限公司 | 离心风扇和具有其的干衣机 |
KR101625828B1 (ko) * | 2014-12-08 | 2016-05-31 | 주식회사 토네이도시스템즈 | 스월러팬을 구비한 배기장치 모듈 |
CN109209993B (zh) * | 2018-11-09 | 2020-08-11 | 嵊州市法帝电器有限公司 | 一种用于集成灶具的风轮及其制造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3135289A1 (de) * | 1981-09-05 | 1983-03-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "waeschetrockner" |
IT218171Z2 (it) * | 1988-06-17 | 1992-04-08 | Zanussi A Spa Industrie | Asciugabiancheria domestica. |
DE3942083A1 (de) * | 1989-12-20 | 1991-06-27 | Licentia Gmbh | Handgefuehrte elektrowerkzeugmaschine |
IT1237157B (it) * | 1989-12-22 | 1993-05-24 | Ocean Spa | Metodo realizzativo e macchina asciugatrice a tamburo rotante perfezionata per biancheria |
DE19904993C2 (de) * | 1999-02-08 | 2003-04-17 | Miele & Cie | Kondensationswäschetrockner |
DE19959977A1 (de) * | 1999-12-13 | 2001-06-21 | Bsh Bosch Siemens Hausgeraete | Haushaltkondenswäschetrockner und Verfahren zu seinem Betrieb |
-
2003
- 2003-05-09 IT IT000015U patent/ITPN20030015U1/it unknown
-
2004
- 2004-04-23 DE DE602004005098T patent/DE602004005098T2/de not_active Expired - Lifetime
- 2004-04-23 EP EP04009650A patent/EP1475474B1/fr not_active Expired - Lifetime
- 2004-04-23 SI SI200430320T patent/SI1475474T1/sl unknown
- 2004-04-23 AT AT04009650T patent/ATE356244T1/de not_active IP Right Cessation
- 2004-04-23 ES ES04009650T patent/ES2283895T3/es not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110965297A (zh) * | 2018-09-27 | 2020-04-07 | 无锡小天鹅电器有限公司 | 衣物处理设备的控制方法 |
CN110965298A (zh) * | 2018-09-27 | 2020-04-07 | 无锡小天鹅电器有限公司 | 衣物处理设备的控制方法 |
Also Published As
Publication number | Publication date |
---|---|
ITPN20030015U1 (it) | 2004-11-10 |
SI1475474T1 (sl) | 2007-08-31 |
ATE356244T1 (de) | 2007-03-15 |
DE602004005098T2 (de) | 2007-11-22 |
ES2283895T3 (es) | 2007-11-01 |
DE602004005098D1 (de) | 2007-04-19 |
EP1475474A1 (fr) | 2004-11-10 |
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