EP2004900A1 - Method and drier for drying pieces of wool - Google Patents
Method and drier for drying pieces of woolInfo
- Publication number
- EP2004900A1 EP2004900A1 EP07712452A EP07712452A EP2004900A1 EP 2004900 A1 EP2004900 A1 EP 2004900A1 EP 07712452 A EP07712452 A EP 07712452A EP 07712452 A EP07712452 A EP 07712452A EP 2004900 A1 EP2004900 A1 EP 2004900A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phase
- drum
- duration
- drying
- dryer
- 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.)
- Granted
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
- D06F58/44—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of conditioning or finishing, e.g. for smoothing or removing creases
-
- 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
-
- 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
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
-
- 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
Definitions
- the invention relates to a method for drying wool pieces in a dryer, which is equipped with a drum which is rotatably mounted in both directions, in which alternate at least one period of motion and at least one standstill period of the drum, and a dryer for performing this method.
- Wool pieces these are textiles made of wool fabrics, are characterized by the fact that they must be treated gently during a drying process, otherwise there is a risk of their damage by matting, shrinking or forming nubs. It is known that wool pieces in a conventional dryer can not be dried, as this usually leads to an unduly high shrinkage of the wool. A continuous movement of the drum is performed because the cost of the drum, the process air blower and the condensation dryer and the cooling air blower are driven by a single motor. For drying woolen pieces, on the one hand, as little mechanical energy as possible should be supplied to the woolen pieces, but on the other hand, all sides of the woolen pieces should be turned toward the warm airflow by sufficient movement to achieve an acceptable drying time.
- DE 19 24 961 A describes a method for drying sensitive types of fabric in a tumble dryer with a rotatably mounted drum and a device for flowing through the drum with heated air, in which the drum is rotated so fast in the majority of the drying process that the laundry items abut the drum due to the centrifugal forces acting without being further moved.
- it is advantageous to divide the drying process into periods of provision of the laundry items and periods of tumbling of the laundry items.
- the temporal portion of the periods of concern in the total dry season is significantly greater than the temporal portion of the periods of clutter. From DE 22 33 698 A a similar process is apparent ' , this method also includes the washing and spinning of the then to be dried laundry.
- DE 101 62 923 A describes a drying method and a drying device for drying textiles, in which textiles with a reduced moisture content are dried at a reduced temperature of the drying air and / or a reduced intensity of the movement of the textiles.
- WO 2005/064071 A2 discloses a method and a device for drying laundry, wherein following a drying program a crease-resistant phase is provided, in which the dried laundry is temporarily moved and temporarily not moved. This is to fix the wrinkles in the laundry by regular loosening to be avoided.
- the duration of the movement period is between 10 seconds and 6 minutes and the duration of the stoppage period is between 5 seconds and 2 minutes.
- the invention also relates to a dryer for carrying out this method.
- a "dryer” is understood to mean not only a device which is intended solely for drying laundry, but rather a device which can both wash and dry textiles.
- the drying method according to the invention can advantageously be combined with a method specially adapted to wool pieces for washing laundry.
- a drying process is used for drying the wool pieces, in which exactly certain movement periods in which the drum rotates alternate with precisely determined standstill periods in which the drum is stationary.
- the wool pieces are still relatively humid, only very short periods of movement, in which the wool pieces are only turned over and not intensively moved against each other.
- the corresponding standstill periods are on the other hand quite long, so that the drying of the wool pieces takes place predominantly in resting state. This avoids felting and shrinkage.
- the duration of the movement period is preferably between 0.1 and 0.6 seconds, particularly preferably between 0.15 and 0.25 seconds.
- the duration of the movement period is between 20 seconds and 5 minutes, more preferably between 30 seconds and 4 minutes. It is especially preferred if the duration of the movement period is between 2.5 and 3 minutes.
- the laundry drum is generally operated at a rotational speed ("drum speed") between 45 and 60 revolutions per minute, preferably between 50 and 54 revolutions per minute, in each movement period.
- the drum speed is below the application speed, wherein the application speed is the drum speed, from which the wool pieces abut due to the centrifugal force on the inner wall of the drum.
- the direction of rotation of the drum may vary.
- the heating phase and stationary drying phase are preferably carried out in the process according to the invention to a moisture content in the range between 10 and 20%.
- the ratio between the duration of the movement period and the duration of the standstill period is preferably 15 to 20.
- the inventive method can both during drying of wool pieces according to the circulating air principle, in which the dry air is guided in a closed circuit and heated before contact with the wool pieces and cooled after contact for condensation of moisture contained in the dry air, as well as applied to the exhaust air principle in which the dry air escapes from the dryer after contact with the wool pieces.
- the initial moisture content is generally about 50 to 60%.
- the temperature of the dryer is generally increased from room temperature to a maximum temperature which is then substantially maintained during the stationary drying phase.
- the maximum temperature in the process can be varied within wide limits. In general, the maximum temperature is about 70 0 C for a condensation dryer. For a vented dryer, the maximum temperature is generally lower.
- the duration of the standstill period is in particular between 1 and 20 minutes, preferably between 3 and 15 minutes, and preferably until the moisture of the wool pieces has dropped to a value of 30%.
- the heating of the dry air can be turned off or turned on during the standstill period. Preferably, the heating of the dry air is turned on.
- the duration of the standstill period is preferably between 1 and 10 minutes, more preferably between 2 and 8 minutes.
- the total duration of the standstill periods in the method according to the invention is generally greater than the total duration of the drum movement periods.
- a device for determining the moisture content of the wool pieces in the dryer is generally used.
- the determination of the moisture of the wool pieces can be done in various ways. For example, as sensors, two electrodes may be introduced into the laundry drum so as to contact the wet wool pieces. An electrical voltage is then applied to the electrodes and the current intensity or the electrical conductance between the electrodes is measured. If the measured current intensity or the measured electrical conductance falls below a respective predetermined threshold, this can be concluded that the end of the heating phase and the stationary drying phase have been reached. In this case, the method according to the invention advantageously provides for a change to the decapping phase.
- the invention also includes a method in which a measurement of the moisture in the wool pieces to be dried is not provided and only an orientation of the time-oriented control of the drying process is provided.
- a controller may be designed based on experience from a moisture-oriented drying process in a suitably equipped model dryer and / or a corresponding simulation.
- the heating phase and the stationary drying phase are summarized and the drum is operated during the corresponding period as described above for the stationary drying phase.
- Such a method preferably operates a de-crescent phase for the last 10 to 15 minutes of the total time scheduled for the method with the above-described motion and standstill rhythms.
- the invention also relates to a dryer with a rotatably mounted around both directions drum for performing the method according to the invention.
- the dryer according to the invention is equipped with sensors for the moisture, in particular with electrodes for determining electrical currents or the conductivity as a measure of this.
- the dryer can be an exhaust air dryer or a condensation dryer, in particular also a dryer with a heat pump cycle.
- the drying method and dryer of the present invention have numerous advantages. For example, the mutually exclusive requirement profiles for the prevention of felting and shrinking and the formation of wrinkles and wrinkles are optimally taken into account.
- FIG. 1 shows a vertically cut drum dryer
- the dryer 1 shown in Figure 1 has a drum 3 rotatable about a horizontal axis, are mounted within which driver 4 for moving laundry during a drum rotation.
- a heater 12, a capacitor 13 as well a fan 14 are provided to produce an air circuit closed by an air duct 2 through the drum 3 therethrough.
- heated air from the heater 12 is passed from behind through its perforated bottom into the drum 3, where it comes into contact with the laundry to be dried and flows through the filling opening of the drum 3 to a lint filter 6 within a door closing the filling opening 5. Subsequently the air flow in the door 5 is deflected downwards and directed from the air duct 2 to the condenser 13.
- the moisture absorbed by the air from the wool pieces (not shown) located in the drum 3 condenses and is removed.
- air from the blower 14 is again directed to the heater 12.
- the drum 3 is mounted on the rear floor by means of a pivot bearing, not shown, and front by means of a bearing plate 7, the drum 3 rests with a brim on a sliding strip 8 on the bearing plate 7 and is held at the front end.
- the control device 11 controls the execution of the drying process, in particular the interruption of the rotation of the drum 3.
- the control device 11 is equipped in a preferred embodiment such that a measurement of the moisture content of the wool pieces can be performed and taken into account in the drying process.
- electrodes 9 and 10 are mounted in the lower region of the drum 3, to which the control device 11 applies an electrical voltage, in order then to measure the intensity of an electric current flowing between the electrodes 9 and 10 or of the electrical conductance between these electrodes for the humidity of the wool pieces in the drum 3 to determine.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006015143A DE102006015143A1 (en) | 2006-03-31 | 2006-03-31 | Drying woolen articles in tumbler dryer, in which reversible rotation alternates with stationary intervals, specifies agitation for initial drying and subsequent crease removal, to prevent fabric damage |
PCT/EP2007/052071 WO2007113064A1 (en) | 2006-03-31 | 2007-03-06 | Method and drier for drying pieces of wool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2004900A1 true EP2004900A1 (en) | 2008-12-24 |
EP2004900B1 EP2004900B1 (en) | 2009-08-05 |
Family
ID=38269089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07712452A Active EP2004900B1 (en) | 2006-03-31 | 2007-03-06 | Method and drier for drying pieces of wool |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2004900B1 (en) |
AT (1) | ATE438757T1 (en) |
DE (2) | DE102006015143A1 (en) |
WO (1) | WO2007113064A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104862937B (en) | 2010-07-09 | 2017-07-14 | Lg电子株式会社 | Method for running clothes treatment device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3286359A (en) * | 1964-06-08 | 1966-11-22 | Whirlpool Co | Anti-wrinkle cycle for dryers |
DE2237412A1 (en) * | 1972-07-27 | 1974-02-07 | Siemens Elektrogeraete Gmbh | METHOD OF DRYING SENSITIVE FABRICS |
DE10162923A1 (en) * | 2001-12-20 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Method and device for drying textiles |
DE10360867A1 (en) * | 2003-12-23 | 2005-07-21 | BSH Bosch und Siemens Hausgeräte GmbH | Method and apparatus for drying laundry |
-
2006
- 2006-03-31 DE DE102006015143A patent/DE102006015143A1/en not_active Withdrawn
-
2007
- 2007-03-06 DE DE502007001252T patent/DE502007001252D1/en active Active
- 2007-03-06 EP EP07712452A patent/EP2004900B1/en active Active
- 2007-03-06 AT AT07712452T patent/ATE438757T1/en active
- 2007-03-06 WO PCT/EP2007/052071 patent/WO2007113064A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007113064A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007113064A1 (en) | 2007-10-11 |
EP2004900B1 (en) | 2009-08-05 |
DE102006015143A1 (en) | 2007-10-04 |
ATE438757T1 (en) | 2009-08-15 |
DE502007001252D1 (en) | 2009-09-17 |
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