WO2009010249A1 - Control method for controlling a tumble laundry drier for drying wool laundry - Google Patents
Control method for controlling a tumble laundry drier for drying wool laundry Download PDFInfo
- Publication number
- WO2009010249A1 WO2009010249A1 PCT/EP2008/005705 EP2008005705W WO2009010249A1 WO 2009010249 A1 WO2009010249 A1 WO 2009010249A1 EP 2008005705 W EP2008005705 W EP 2008005705W WO 2009010249 A1 WO2009010249 A1 WO 2009010249A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drum
- control method
- laundry
- wool
- rotation speed
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2101/10—Spin speed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/06—Type or material
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
- D06F2103/10—Humidity expressed as capacitance or resistance
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/34—Humidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/62—Stopping or disabling machine operation
Definitions
- the present invention relates to a control method for controlling a tumble laundry drier for drying wool laundry.
- Drying woollens poses serious difficulties, on account of the tendency of woollens to felt, thus resulting in irreparable damage. Felting of woollens is caused by overheating the wool, and by the woollens rubbing against the inner surface of the drum or against other woollens.
- Felting of woollens caused by overheating can be prevented by simply reducing and accurately controlling heating of the woollens during the drying process.
- the rack represents an extra cost for the customer, and is also cumbersome and therefore difficult to store when not in use.
- the relative humidity of the woolens cannot be measured during the drying cycle, to stop the drying cycle when the humidity of the woollens reaches a given value. Consequently, using a rack, the drying cycle must be of constant predetermined duration, regardless of the actual weight and initial humidity of the woollens .
- Figure 1 shows a schematic side view of a tumble laundry- drier implementing a control method for drying wool laundry in accordance with the present invention
- Figure 2 shows a graph of the rotation speed of a revolving drum of the Figure 1 tumble laundry drier during a wool drying cycle .
- Number 1 in Figure 1 indicates as a whole a laundry drier comprising a casing 2 resting on a floor on a number of feet .
- Casing 2 supports a revolving laundry drum 3, which defines a drying chamber 4 for the laundry 5 to be dried, rotates about a horizontal rotation axis 6 (in alternative embodiments not shown, rotation axis 6 may be tilted or vertical) , and has a front access opening closed by a door 7 hinged to a front wall of casing 2.
- Drum 3 is rotated by an electric motor 8, and is fed through with a stream of drying air fed into drum 3 by a centrifugal fan 9 and heated by a heating device 10.
- fan 9 produces a stream of dry air that is fed to heating device 10 and then into drum 3 through a perforated back of the drum. After contacting laundry 5, the dry air flows out of drum 3 to a condenser 11, in which it is cooled to condense the laundry moisture contained in it .
- condenser 11 is fed through with cooling air drawn in from outside tumble laundry drier 1; and the dry air from condenser 11 is drawn in again by fan 9.
- condenser 11 is referred to here purely by way of example in connection with one embodiment of the present invention, and may be omitted in the case of an exhaust-type tumble laundry drier 1 (i.e. in which the hot drying air from drum 3 is exhausted directly to the outside) .
- the rotation speed of electric motor 8, which rotates drum 3 about rotation axis 6, is controlled by an electronic control unit 12, which receives the input commands from the user of tumble laundry drier 1. More specifically, electronic control unit 12 performs a wool drying cycle specially designed for felt-free drying wool laundry 5.
- electronic control unit 12 controls heating device 10 to reduce heating of the drying air and hence the temperature of wool laundry 5 to well below the felting temperature of the wool.
- electronic control unit 12 also controls electric motor 8 to rotate drum 3 about rotation axis 6 at a variable rotation speed n. More specifically, when designing tumble laundry drier 1, a rotation speed n 2 is determined at which centrifugal acceleration of the inner surface of drum 3 equals gravitational acceleration (i.e. 1 g) . Rotation speed n 2 is easily calculated using the following equations :
- n is the rotation speed of drum 3 measured in radiants/second
- ⁇ is the rotation speed of drum 3 measured in revolutions/minute
- a is the centrifugal acceleration of drum 3
- r is the radius of drum 3.
- drum 3 is rotated at a constant rotation speed ni greater than rotation speed n 2 at which centrifugal acceleration of the inner surface of drum 3 equals gravitational acceleration, so wool laundry 5 is pressed by centrifugal force against the inner surface of drum 3, as opposed to dropping inside drum 3.
- rotation of drum 3 is stopped cyclically by zeroing rotation speed n, and drum 3 is re-accelerated back to rotation speed n x to rearrange wool laundry 5 inside drum 3.
- centrifugal acceleration greater than gravitational acceleration i.e.
- wool laundry 5 is rearranged cyclically inside drum 3 by cyclically stopping drum 3 for about 2 seconds (generally about 1-3 seconds) .
- rotation of drum 3 should be stopped cyclically every 5-15 minutes and, preferably, about every 10 minutes.
- rotation speed ni is about 70 rpm (revolutions per minute) and, more generally, ranges between 65 and 75 rpm, for a drum 3 of 575 mm in diameter.
- rotation speed Ti 1 must not be too close to rotation speed n 2 .
- rotation speed U 1 must not be too far from rotation speed n 2 , to avoid excessive mechanical stress of wool laundry 5 caused by high centrifugal acceleration.
- rotation speed n of drum 3 is decreased/increased with a deceleration/acceleration of about 20-35 revolutions/second 2 (i.e. drum 3 needs about 2-3 seconds to decelerate/accelerate from 70/0 rpm to 0/70 rpm) .
- deceleration/acceleration values of drum 3 are important by greatly reducing rubbing (and so preventing felting) of wool laundry 5 during deceleration/acceleration of drum 3.
- electronic control unit 12 determines the position of wool laundry 5 inside drum 3, and stops drum 3 so that, when drum 3 is stopped, wool laundry 5 is at the bottom of drum 3.
- drum 3 has three lifters 15, each with a sensor 16 for sensing the presence of wool laundry 5; and electronic control unit 12 determines the lifter/s 15 contacting wool laundry 5, and stops drum 3 so that, when drum 3 is stopped, the lifter/s 15 contacting wool laundry 5 is/are in a low position (for example, by commencing stoppage of drum 3 when the lifter/s 15 contacting wool laundry 5 is/are about 120° upstream from its/their lowest position) .
- Figure 2 shows a graph of rotation speed n of revolving drum 3 during the wool drying cycle.
- Wool drying cycle as described above has numerous advantages, by being cheap and easy to implement in a standard tumble drier (no additional components, other than those normally featured in a modern tumble drier are required) , and by enabling careful (i.e. felt-free) but nevertheless effective drying of wool laundry. More specifically, determining the end of the drying cycle on the basis of the measured humidity (i.e. electric resistance/conductivity) of the laundry to be dried, the wool drying cycle as described above minimizes mechanical stress of the wool laundry (i.e. eliminates undue mechanical stress caused by a longer than necessary drying cycle) , is effective (i.e. at the end of the drying cycle, the wool laundry is as dry as necessary), and is efficient (i.e. the drying cycle wastes no electric energy) regardless of variations in the weight and initial humidity of the wool laundry to be dried.
- the measured humidity i.e. electric resistance/conductivity
Abstract
A control method for controlling a tumble laundry drier (1) for drying wool laundry (5); the control method includes the steps of : loading the wool laundry (5) into a drum (3) of the tumble laundry drier (1); feeding a stream of drying air into the drum (3); rotating the drum (3) at a first rotation speed (n1) greater than a second rotation speed (n2) at which centrifugal acceleration of the inner surface of the drum (3) equals gravitational acceleration, so the wool laundry (5) is pressed by centrifugal force against the inner surface of the drum (3), as opposed to dropping inside the drum (3); and cyclically stopping rotation of the drum (3) by zeroing the rotation speed (n) and then re-accelerating the drum (3) back to the first rotation speed (n1) to rearrange the wool laundry (5) inside the drum (3).
Description
CONTROL METHOD FOR CONTROLLING A TUMBLE LAUNDRY DRIER FOR DRYING WOOL LAUNDRY
TECHNICAL FIELD The present invention relates to a control method for controlling a tumble laundry drier for drying wool laundry.
BACKGROUND ART
Drying woollens poses serious difficulties, on account of the tendency of woollens to felt, thus resulting in irreparable damage. Felting of woollens is caused by overheating the wool, and by the woollens rubbing against the inner surface of the drum or against other woollens.
Felting of woollens caused by overheating can be prevented by simply reducing and accurately controlling heating of the woollens during the drying process.
To prevent rubbing-induced felting of woollens, most commercial driers feature an extra mechanical component (so- called "rack") which supports the woollens in a fixed position inside the drum during the drying cycle. In other words, in the rack, the woollens are supported in a fixed position inside the drum, so the warm air flows over the surface of the wool with no mechanical movement of the woollens. Examples of a drying rack for drying stationary woollens are described in US2006096120A1 and US2004118012A1.
Drying woollens in a rack, however, results in uneven drying, in that, at the end of the drying process, the woollens are perfectly dry on the outside, but still relatively damp on the inside. Furthermore, the rack represents an extra cost for the customer, and is also cumbersome and therefore difficult to store when not in use. Finally, using a rack, the relative humidity of the woolens cannot be measured during the drying cycle, to stop the drying cycle when the humidity of the woollens reaches a given value. Consequently, using a rack, the drying cycle must be of constant predetermined duration, regardless of the actual weight and initial humidity of the woollens .
DISCLOSURE OF INVENTION It is an object of the present invention to provide a control method for controlling a tumble laundry drier for drying wool laundry, and which is designed to eliminate the aforementioned drawbacks, is cheap and easy to implement, and, in particular, provides for drying wool laundry quickly with no felting of the wool.
According to the present invention, there is provided a control method for controlling a tumble laundry drier for drying wool laundry, as claimed in the accompanying Claims.
BRIEF DESCRIPTION OF THE DRAWINGS
A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying
drawings, in which:
Figure 1 shows a schematic side view of a tumble laundry- drier implementing a control method for drying wool laundry in accordance with the present invention; Figure 2 shows a graph of the rotation speed of a revolving drum of the Figure 1 tumble laundry drier during a wool drying cycle .
PREFERRED EMBODIMENTS OF THE INVENTION Number 1 in Figure 1 indicates as a whole a laundry drier comprising a casing 2 resting on a floor on a number of feet . Casing 2 supports a revolving laundry drum 3, which defines a drying chamber 4 for the laundry 5 to be dried, rotates about a horizontal rotation axis 6 (in alternative embodiments not shown, rotation axis 6 may be tilted or vertical) , and has a front access opening closed by a door 7 hinged to a front wall of casing 2. Drum 3 is rotated by an electric motor 8, and is fed through with a stream of drying air fed into drum 3 by a centrifugal fan 9 and heated by a heating device 10. During operation, fan 9 produces a stream of dry air that is fed to heating device 10 and then into drum 3 through a perforated back of the drum. After contacting laundry 5, the dry air flows out of drum 3 to a condenser 11, in which it is cooled to condense the laundry moisture contained in it . For which purpose, condenser 11 is fed through with cooling air drawn in from outside tumble laundry drier 1; and the dry air from condenser 11 is drawn in again by fan 9.
It should be pointed out that condenser 11 is referred to here purely by way of example in connection with one embodiment of the present invention, and may be omitted in the case of an exhaust-type tumble laundry drier 1 (i.e. in which the hot drying air from drum 3 is exhausted directly to the outside) .
The rotation speed of electric motor 8, which rotates drum 3 about rotation axis 6, is controlled by an electronic control unit 12, which receives the input commands from the user of tumble laundry drier 1. More specifically, electronic control unit 12 performs a wool drying cycle specially designed for felt-free drying wool laundry 5.
First of all, during the wool drying cycle, electronic control unit 12 controls heating device 10 to reduce heating of the drying air and hence the temperature of wool laundry 5 to well below the felting temperature of the wool.
During the wool drying cycle, electronic control unit 12 also controls electric motor 8 to rotate drum 3 about rotation axis 6 at a variable rotation speed n. More specifically, when designing tumble laundry drier 1, a rotation speed n2 is determined at which centrifugal acceleration of the inner surface of drum 3 equals gravitational acceleration (i.e. 1 g) . Rotation speed n2 is easily calculated using the following equations :
n = 60 * ω / 2it a = co2 * r
where : n is the rotation speed of drum 3 measured in radiants/second; ω is the rotation speed of drum 3 measured in revolutions/minute; a is the centrifugal acceleration of drum 3 ; r is the radius of drum 3.
During the wool drying cycle, drum 3 is rotated at a constant rotation speed ni greater than rotation speed n2 at which centrifugal acceleration of the inner surface of drum 3 equals gravitational acceleration, so wool laundry 5 is pressed by centrifugal force against the inner surface of drum 3, as opposed to dropping inside drum 3. In addition, during the wool drying cycle, rotation of drum 3 is stopped cyclically by zeroing rotation speed n, and drum 3 is re-accelerated back to rotation speed nx to rearrange wool laundry 5 inside drum 3. In other words, keeping wool laundry 5 pressed against the inner surface of drum 3 by centrifugal acceleration greater than gravitational acceleration (i.e. by a centrifugal force greater than the gravitational force) eliminates (or at least greatly reduces) mechanical stress on wool laundry 5 caused by wool laundry 5 dropping and tumbling inside the rotating drying drum 3. At the same time, to avoid uneven drying of wool laundry 5, wool laundry 5 is rearranged cyclically inside drum 3 by
cyclically stopping drum 3 for about 2 seconds (generally about 1-3 seconds) .
To effectively rearrange wool laundry 5 during the wool drying cycle, and so achieve uniform drying of the wool, while at the same time preventing excessive mechanical stress of the wool, rotation of drum 3 should be stopped cyclically every 5-15 minutes and, preferably, about every 10 minutes.
In a preferred embodiment, rotation speed ni is about 70 rpm (revolutions per minute) and, more generally, ranges between 65 and 75 rpm, for a drum 3 of 575 mm in diameter. In connection with the above, it is important to point out that, to allow for tolerances and, particularly, to avoid excessive movement of wool laundry 5 as drum 3 rotates, rotation speed Ti1 must not be too close to rotation speed n2. On the other hand, rotation speed U1 must not be too far from rotation speed n2, to avoid excessive mechanical stress of wool laundry 5 caused by high centrifugal acceleration.
In a preferred embodiment, at each cyclic stop in rotation of drum 3, rotation speed n of drum 3 is decreased/increased with a deceleration/acceleration of about 20-35 revolutions/second2 (i.e. drum 3 needs about 2-3 seconds to decelerate/accelerate from 70/0 rpm to 0/70 rpm) . These deceleration/acceleration values of drum 3 are important by greatly reducing rubbing (and so preventing felting) of wool laundry 5 during deceleration/acceleration of drum 3.
In a preferred embodiment, electronic control unit 12 determines the position of wool laundry 5 inside drum 3, and stops drum 3 so that, when drum 3 is stopped, wool laundry 5 is at the bottom of drum 3. This prevents wool laundry 5 from dropping inside drum 3 when the drum is stopped, and so further reduces mechanical stress of wool laundry 5. More specifically, drum 3 has three lifters 15, each with a sensor 16 for sensing the presence of wool laundry 5; and electronic control unit 12 determines the lifter/s 15 contacting wool laundry 5, and stops drum 3 so that, when drum 3 is stopped, the lifter/s 15 contacting wool laundry 5 is/are in a low position (for example, by commencing stoppage of drum 3 when the lifter/s 15 contacting wool laundry 5 is/are about 120° upstream from its/their lowest position) . Figure 2 shows a graph of rotation speed n of revolving drum 3 during the wool drying cycle. As shown in Figure 2, during the wool drying cycle, rotation speed n is kept substantially constant at rotation speed nx greater than rotation speed n2, and drum 3 is stopped cyclically. Electronic control unit 12 is connected to a humidity sensor 13 to measure the relative humidity of wool laundry 5 during the wool drying cycle. Humidity sensor 13 comprises a pair of electrodes 14 contacting wool laundry 5 inside drum 3 to measure the resistance/conductivity of wool laundry 5, and uses the resistance/conductivity of wool laundry 5 to determine the humidity of wool laundry 5. Electronic control unit 12 stops the
wool drying cycle when the electric resistance/conductivity between the two electrodes 14 is above/below a resistance/conductivity threshold (i.e. the humidity of wool laundry 5 is below a humidity threshold) . Preferably, to decide stoppage of the wool drying cycle, the resistance/conductivity measured between the two electrodes 14 immediately after a cyclic stop in rotation of drum 3 is compared with the resistance/conductivity threshold.
In connection with the above, it is important to point out that, immediately after a cyclic stop in rotation of drum 3, wool laundry 5 has just been rearranged, so the measured resistance/conductivity between the two electrodes 14 better reflects the actual humidity of wool laundry 5 as a whole. In other words, the actual humidity of wool laundry 5 as a whole is better (i.e. more accurately) determined by measuring the resistance/conductivity between the two electrodes 14 immediately after a cyclic stop in rotation of drum 3.
Wool drying cycle as described above has numerous advantages, by being cheap and easy to implement in a standard tumble drier (no additional components, other than those normally featured in a modern tumble drier are required) , and by enabling careful (i.e. felt-free) but nevertheless effective drying of wool laundry. More specifically, determining the end of the drying cycle on the basis of the measured humidity (i.e. electric resistance/conductivity) of the laundry to be dried, the wool drying cycle as described above minimizes mechanical
stress of the wool laundry (i.e. eliminates undue mechanical stress caused by a longer than necessary drying cycle) , is effective (i.e. at the end of the drying cycle, the wool laundry is as dry as necessary), and is efficient (i.e. the drying cycle wastes no electric energy) regardless of variations in the weight and initial humidity of the wool laundry to be dried.
Claims
1) A control method for controlling a tumble laundry drier (1) for drying wool laundry (5) ; the control method comprising the steps of : loading the wool laundry (5) into a drum (3) of the tumble laundry drier (1) ; feeding a stream of drying air into the drum (3) ; and rotating the drum (3) about a rotation axis (6) at a variable rotation speed (n) ; the control method being characterized by comprising the steps of : rotating the drum (3) at a first rotation speed (ni) greater than a second rotation speed (n2) at which centrifugal acceleration of the inner surface of the drum (3) equals gravitational acceleration, so the wool laundry (5) is pressed by centrifugal force against the inner surface of the drum (3) , as opposed to dropping inside the drum (3) ; and cyclically stopping rotation of the drum (3) by zeroing the rotation speed (n) and then re-accelerating the drum (3) back to the first rotation speed (nx) to rearrange the wool laundry (5) inside the drum (3) .
2) A control method as claimed in Claim 1, wherein the first rotation speed (ni) ranges between 65 and 75 rpm for a drum (3) of 575 mm in diameter.
3) A control method as claimed in Claim 2, wherein the first rotation speed (ni) is about 70 rpm for a drum (3) of 575 mm in diameter.
4) A control method as claimed in Claim 1, 2 or 3 , wherein, at each cyclic stop in rotation of the drum (3) , the rotation speed (n) of the drum (3) is decreased/increased with a deceleration/acceleration of about 20-35 revolutions/second2.
5) A control method as claimed in any of Claims 1 to 4 , wherein rotation of the drum (3) is stopped cyclically every 5- 15 minutes.
6) A control method as claimed in Claim 5, wherein rotation of the drum (3) is stopped cyclically every 10 minutes.
7) A control method as claimed in any of Claims 1 to 6, wherein, at the stop stage, the drum (3) is stopped for about 1- 3 seconds.
8) A control method as claimed in Claim 7, wherein, at the stop stage, the drum (3) is stopped for about 2 seconds.
9) A control method as claimed in any of Claims 1 to 8 and comprising the further steps of: measuring the electric resistance/conductivity between two electrodes (14) contacting the wool laundry (5) inside the drum (3) ; and stopping the drying cycle when the electric resistance/conductivity between the two electrodes (14) is above/below a resistance/conductivity threshold.
10) A control method as claimed in Claim 9, wherein, to decide stoppage of the drying cycle, the resistance/conductivity measured between the two electrodes (14) immediately after a cyclic stop in rotation of the drum (3) is compared with the resistance/conductivity threshold.
11) A control method as claimed in any of Claims 1 to 10, and comprising the further steps of: determining the position of the wool laundry (5) inside the drum (3) ; and stopping the drum (3) so that, when the drum (3) is stopped, the wool laundry (5) is at the bottom of the drum (3) .
12) A control method as claimed in Claim 11, wherein the drum (3) has a number of lifters (15) , each with a sensor (16) for sensing the presence of the wool laundry (5) ; and the control method comprises the further steps of: determining the lifter/s (15) contacting the wool laundry (5) ; and stopping the drum (3) so that, when the drum (3) is stopped, the lifter/s (15) contacting the wool laundry (5) is/are in a low position.
13) A control method as claimed in Claim 12, and comprising the further step of commencing stoppage of the drum (3) when the lifter/s (15) contacting the wool laundry (5) is/are about 120° upstream from its/their lowest position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07112493A EP2014822B1 (en) | 2007-07-13 | 2007-07-13 | Control method for controlling a tumble laundry drier for drying wool laundry |
EP07112493.7 | 2007-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009010249A1 true WO2009010249A1 (en) | 2009-01-22 |
Family
ID=38663069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/005705 WO2009010249A1 (en) | 2007-07-13 | 2008-07-11 | Control method for controlling a tumble laundry drier for drying wool laundry |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2014822B1 (en) |
AT (1) | ATE499480T1 (en) |
DE (1) | DE602007012679D1 (en) |
ES (1) | ES2361775T3 (en) |
PL (1) | PL2014822T3 (en) |
RU (1) | RU2467111C2 (en) |
WO (1) | WO2009010249A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114672970A (en) * | 2022-02-18 | 2022-06-28 | 无锡小天鹅电器有限公司 | Control method of clothes treatment equipment and clothes treatment equipment |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2591162B1 (en) * | 2010-07-09 | 2016-04-20 | LG Electronics Inc. | Method for operating clothes treating apparatus |
EP2458076B1 (en) | 2010-11-29 | 2014-01-08 | Electrolux Home Products Corporation N.V. | Rotatable-drum laundry drier and method of controlling a rotatable-drum laundry drier to dry delicate laundry |
ITTO20101070A1 (en) * | 2010-12-27 | 2012-06-28 | Indesit Co Spa | PROCEDURE AND MACHINE FOR THE LINEN DRYING |
EP2487291B1 (en) | 2011-02-11 | 2015-07-01 | Electrolux Home Products Corporation N.V. | Rotatable-drum laundry drier and method of controlling a rotatable-drum laundry drier to dry delicate laundry |
CN102899871B (en) * | 2012-10-11 | 2017-07-18 | 青岛海尔滚筒洗衣机有限公司 | It is a kind of to change the method and dryer for improving clothes drying effect by drum speed |
KR101594368B1 (en) * | 2013-09-03 | 2016-02-16 | 엘지전자 주식회사 | Laundry Treating Apparatus and Control Method for the same |
DE102016113723A1 (en) | 2016-07-26 | 2018-02-01 | Miele & Cie. Kg | A method for treating laundry, method and apparatus for operating a laundry treating machine and laundry treating machine for treating laundry |
KR20200073061A (en) * | 2018-12-13 | 2020-06-23 | 엘지전자 주식회사 | laundry machine having an induction heater and the control method of the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2306111A1 (en) * | 1973-02-08 | 1974-08-22 | Licentia Gmbh | METHOD OF DRYING SENSITIVE FABRICS |
EP1103648A2 (en) * | 1999-11-29 | 2001-05-30 | Electrolux Zanussi S.p.A. | Method and condenser dryer for drying clothes |
US20040118012A1 (en) * | 2001-01-30 | 2004-06-24 | Barbara Gruble | Drying rack for a laundry dryer |
US20060096120A1 (en) * | 2001-01-30 | 2006-05-11 | Bsh Bosch Und Siemens Hausgerate Gmbh | Drying rack for a laundry dryer |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1213095A1 (en) * | 1984-01-26 | 1986-02-23 | Всесоюзный Научно-Исследовательский Экспериментально-Конструкторский Институт Электробытовых Машин И Приборов | Device for drying textile articles |
JP2002233697A (en) * | 2001-02-09 | 2002-08-20 | Rinnai Corp | Clothes dryer |
-
2007
- 2007-07-13 PL PL07112493T patent/PL2014822T3/en unknown
- 2007-07-13 AT AT07112493T patent/ATE499480T1/en not_active IP Right Cessation
- 2007-07-13 EP EP07112493A patent/EP2014822B1/en active Active
- 2007-07-13 DE DE602007012679T patent/DE602007012679D1/en active Active
- 2007-07-13 ES ES07112493T patent/ES2361775T3/en active Active
-
2008
- 2008-07-11 WO PCT/EP2008/005705 patent/WO2009010249A1/en active Application Filing
- 2008-07-11 RU RU2010105034/12A patent/RU2467111C2/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2306111A1 (en) * | 1973-02-08 | 1974-08-22 | Licentia Gmbh | METHOD OF DRYING SENSITIVE FABRICS |
EP1103648A2 (en) * | 1999-11-29 | 2001-05-30 | Electrolux Zanussi S.p.A. | Method and condenser dryer for drying clothes |
US20040118012A1 (en) * | 2001-01-30 | 2004-06-24 | Barbara Gruble | Drying rack for a laundry dryer |
US20060096120A1 (en) * | 2001-01-30 | 2006-05-11 | Bsh Bosch Und Siemens Hausgerate Gmbh | Drying rack for a laundry dryer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114672970A (en) * | 2022-02-18 | 2022-06-28 | 无锡小天鹅电器有限公司 | Control method of clothes treatment equipment and clothes treatment equipment |
CN114672970B (en) * | 2022-02-18 | 2023-12-26 | 无锡小天鹅电器有限公司 | Control method of laundry treatment apparatus and laundry treatment apparatus |
Also Published As
Publication number | Publication date |
---|---|
ATE499480T1 (en) | 2011-03-15 |
DE602007012679D1 (en) | 2011-04-07 |
EP2014822A1 (en) | 2009-01-14 |
PL2014822T3 (en) | 2011-09-30 |
EP2014822B1 (en) | 2011-02-23 |
RU2467111C2 (en) | 2012-11-20 |
RU2010105034A (en) | 2011-08-20 |
ES2361775T3 (en) | 2011-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2009010249A1 (en) | Control method for controlling a tumble laundry drier for drying wool laundry | |
EP2630289B1 (en) | Washing machine and control method thereof | |
EP2152952B1 (en) | Method of controlling a tumble laundry drier | |
US9009987B2 (en) | Clothing dryer and control method thereof | |
AU2011335117B2 (en) | Rotatable-drum laundry drier and method of controlling a rotatable-drum laundry drier to dry delicate laundry | |
EP2487291B1 (en) | Rotatable-drum laundry drier and method of controlling a rotatable-drum laundry drier to dry delicate laundry | |
KR100640789B1 (en) | Clothes drier | |
EP2336419B1 (en) | Clothes dryer | |
US9580860B2 (en) | Method for operating a clothes dryer using load temperature determined by an infrared sensor | |
AU2011335141B2 (en) | Rotatable-drum laundry drier and method of controlling a rotatable-drum laundry drier | |
EP2843114A1 (en) | Rotary-drum laundry dryer | |
KR20090126138A (en) | Dryer and controlling method thereof | |
KR20100096387A (en) | Controlling method of cloth treating apparatus | |
JP2013128637A (en) | Drum type dryer | |
US11346043B2 (en) | Dryer appliance and a method of operating the same in response to restricted air flow | |
JP5974291B2 (en) | Clothes dryer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08773972 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010105034 Country of ref document: RU |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 08773972 Country of ref document: EP Kind code of ref document: A1 |