US20070209228A1 - Method And Device For Drying Clothes - Google Patents
Method And Device For Drying Clothes Download PDFInfo
- Publication number
- US20070209228A1 US20070209228A1 US10/584,164 US58416404A US2007209228A1 US 20070209228 A1 US20070209228 A1 US 20070209228A1 US 58416404 A US58416404 A US 58416404A US 2007209228 A1 US2007209228 A1 US 2007209228A1
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- Prior art keywords
- laundry
- drum
- time interval
- temperature
- drying
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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
- D06F58/32—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
- D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2101/02—Characteristics of laundry or load
- D06F2101/04—Quantity, e.g. weight
-
- 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
- D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
-
- 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
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- 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
- D06F2103/02—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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/12—Temperature
-
- 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
- D06F2103/32—Temperature
-
- 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
- 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 present invention relates to a method and a device for drying clothes.
- an anti-crease cycle is provided at the end of a drying program or a drying phase.
- a drying program usually comprises a heating-up phase, a subsequent actual drying phase and a following cooling-down phase. During all these phases belonging to a drying program, the drum is usually rotated continuously. This also applies during the cooling-down phase when the heating is merely switched off. If the dried laundry is not removed immediately from the drum at the end of a drying program, creases can be fixed in the laundry. In order to prevent this, the drum is either rotated continuously or the drum is rotated intermittently during the subsequent anti-crease cycle.
- the laundry located in the drum is increasingly loosened so that no creases can form in the laundry.
- the intermittent rotation of the drum is usually effected according to a fixed pattern, such as for example stoppage of the drum for two minutes followed by rotation of the drum for fifteen seconds. This intermittent operation continues either until the end of the anti-crease cycle which can last up to three or five hours or until the time when the laundry is removed from the drum.
- a disadvantage with this anti-crease cycle is that the laundry is exposed to further stress through the movement of the drum.
- the drive motor and the switching elements for switching the drive motor on and off are also further stressed by the continuous switching-on and off.
- a drying program is followed by an anti-crease cycle, wherein the laundry is intermittently agitated.
- the agitation of the laundry decreases with time or since the agitation of the laundry during the anti-crease cycle decreases as the temperature of the laundry decreases and/or as the residual moisture of the laundry decreases, or since the agitation of the laundry during the anti-crease cycle is dependent on the pre-selected drying program and/or the pre-selected degree of drying and/or the pre-selected type of laundry, or since the agitation of the laundry during the anti-crease cycle is dependent on the amount of laundry preset by a user and/or the amount of laundry determined by the device, it is achieved that the laundry is only agitated sufficiently during the anti-crease cycle to avoid crease formation.
- the laundry is only minimally agitated or loosened during the anti-crease cycle and thus is treated very gently, whereby crease formation can be optimally avoided.
- the motor for turning the drum is switched on and off less frequently, and especially towards the end of the anti-crease cycle, the switch-on time of the drum movement is reduced substantially so that the components for the drum movement such as the motor, relays for switching the motor on and off and the drum bearing are less stressed and thus the lifetime and the reliability of the device is increased.
- energy is saved since the overall switch-on time of the drum movement during and in the course of the anti-crease cycle is substantially reduced.
- the proportion of agitation can be optimally matched to the pre-selected drying program or to the pre-selected degree of drying or the pre-selected type of laundry. For example, a “damp for ironing” drying program requires an overall higher proportion of agitation than a “cupboard-dry” or “very dry” drying program.
- the proportion of agitation can be optimally matched to the quantity of laundry located in the drum.
- the proportion of agitation of the laundry can be minimised for each operating state so that the laundry and the components of the device are treated gently and the energy consumption is reduced.
- the agitation of the laundry during the anti-crease cycle is therefore dependent on measured quantities and parameters which are detected in preceding phases of a drying program and/or during the anti-crease cycle.
- measured quantities and parameters which are detected during a heating-up phase at the beginning of a drying program and/or during a cooling-down phase at the end of the drying program can also be taken into account.
- the quantity of laundry and/or the heating-up time and/or the laundry moisture and/or the laundry moisture profile and/or the laundry specific conductance and/or the profile of the laundry specific conductance and/or the moisture content and/or the moisture profile and/or the temperature of the laundry and/or the temperature profile of the laundry and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer and/or the comparison of the moisture content and/or the moisture profile and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer between entry into the drum and exit from the drum and/or the time before reaching a drying target can thus be used as measured quantities or parameters.
- the rotatable drum has rotary movement time intervals and stoppage time intervals in the anti-crease cycle.
- the drum can be turned in one direction of rotation and/or reversingly in different directions of rotation.
- the duration of an anti-crease cycle is preferably one to five hours.
- the duration of the anti-crease cycle is preferably divided into four time intervals wherein in a first time interval the proportions of agitation lie between 20% and 90%, and that in a second time interval the proportions of agitation lie between 10% and 70%, and that in a third time interval the proportions of agitation lie between 1% and 60% and that in a fourth time interval the proportions of agitation lie between 1% and 30%.
- a device for drying laundry comprises a rotatable drum for agitating the laundry and a control device which is capable of carrying out the process steps and process sequences specified hereinbefore.
- the device has a control device with an input device and a timing element.
- the device has sensor devices for detecting measured quantities and parameters, which are supplied to the control device and processed in the control device according to the preceding process sequences.
- the device for drying laundry has a heater for heating the drying air, a motor for driving the drum and a fan for conveying the drying air are provided.
- FIG. 1 is a device for drying laundry.
- a device for drying laundry comprises a housing 1 in which a drum 2 is rotatably mounted, a loading door 3 , a front bearing plate 4 , an inlet duct 5 for drying air in which a heating device 6 is located, an outlet duct 7 for drying air in which a fan 8 is located and a motor 9 which drives the drum 2 by means of a belt 10 .
- a control device 11 comprising an input device 12 and a timing element 13 .
- a first temperature sensor 14 is arranged in the inlet duct 5 adjacent to the inlet to the drum 2 and a second temperature sensor 15 is arranged in the outlet duct 7 adjacent to the drum 2 .
- the first temperature sensor 14 , the second temperature sensor 15 and the electrodes are connected to the control device 11 which is capable of processing signals from the sensors and the input device 12 .
- the device for drying laundry described hereinbefore can also be constructed as an exhaust air dryer or a condensation dryer.
- the device for drying laundry as shown in FIG. 1 can be provided with further sensors such as laundry temperature sensors or the like in order to carry out the process sequences and process steps described hereinafter.
- the agitation of the laundry decreases with time or since the agitation of the laundry during the anti-crease cycle decreases as the temperature of the laundry decreases and/or as the residual moisture of the laundry decreases, or since the agitation of the laundry during the anti-crease cycle is dependent on the pre-selected drying program and/or the pre-selected degree of drying and/or the pre-selected type of laundry, or since the agitation of the laundry during the anti-crease cycle is dependent on the amount of laundry preset by a user and/or the amount of laundry determined by the device, it is achieved that the laundry is only agitated sufficiently during the anti-crease cycle to avoid crease formation.
- the laundry is only minimally agitated or loosened during the anti-crease cycle and thus is treated very gently, whereby crease formation can be optimally avoided.
- the motor for turning the drum is switched on and off less frequently, and especially towards the end of the anti-crease cycle, the switch-on time of the drum movement is reduced substantially so that the components for the drum movement such as the motor, relays for switching the motor on and off and the drum bearing are less stressed and thus the lifetime and the reliability of the device is increased.
- energy is saved since the overall switch-on time of the drum movement during and in the course of the anti-crease cycle is substantially reduced.
- the proportion of agitation can be optimally matched to the pre-selected drying program or to the pre-selected degree of drying or the pre-selected type of laundry. For example, a “damp for ironing” drying program requires an overall higher proportion of agitation than a “closet-dry” or “very dry” drying program.
- the proportion of agitation can be optimally matched to the quantity of laundry located in the drum.
- the proportion of agitation of the laundry can be minimized for each operating state so that the laundry and the components of the device are treated gently and the energy consumption is reduced.
- the agitation of the laundry during the anti-crease cycle is therefore dependent on measured quantities and parameters which are detected in preceding phases of a drying program and/or during the anti-crease cycle.
- measured quantities and parameters which are detected during a heating-up phase at the beginning of a drying program and/or during a cooling-down phase at the end of the drying program can also be taken into account.
- the quantity of laundry and/or the heating-up time and/or the laundry moisture and/or the laundry moisture profile and/or the laundry specific conductance and/or the profile of the laundry specific conductance and/or the moisture content and/or the moisture profile and/or the temperature of the laundry and/or the temperature profile of the laundry and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer and/or the comparison of the moisture content and/or the moisture profile and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer between entry into the drum and exit from the drum and/or the time before reaching a drying target can thus be used as measured quantities or parameters.
- the rotatable drum has rotary movement time intervals and stoppage time intervals in the anti-crease cycle.
- the drum can be turned in one direction of rotation and/or reversingly in different directions of rotation.
- the duration of an anti-crease cycle is preferably one to five hours.
- the duration of the anti-crease cycle is preferably divided into four time intervals wherein in a first time interval the proportions of agitation lie between 20% and 90%, and that in a second time interval the proportions of agitation lie between 10% and 70%, and in a third time interval the proportions of agitation lie between 1% and 60% and that in a fourth time interval the proportions of agitation lie between 1% and 30%.
- the drum agitation in a first time interval the drum agitation is switched off for 104 s and switched on for 16 s and in a second time interval the drum agitation is switched off for 284 s and switched on for 16 s and in a third time interval the drum agitation is switched off for 584 s and switched on for 16 s, and in a fourth time interval the drum agitation is switched off for 584 s and switched on for 16 s.
- an anti-crease cycle is provided wherein the laundry is intermittently agitated.
- This anti-crease cycle is used to avoid fixing of creases in the laundry by regular loosening of the laundry.
- the laundry is agitated minimally in the course of the anti-crease cycle so that crease formation is avoided.
Abstract
A method for drying clothes in a device comprising a rotatable drum for agitating the clothes. Following a drying program, an anti-crease cycle is provided during which the clothes are intermittently agitated. Said anti-crease cycle protects the clothes from permanent creases by regularly agitating them. In order to save energy and to save the clothes and the device, the clothes are only agitated to such a degree during the anti-crease cycle that crease-formation is avoided.
Description
- The present invention relates to a method and a device for drying clothes.
- When drying laundry using a laundry dryer which comprises a rotating drum for receiving laundry, an anti-crease cycle is provided at the end of a drying program or a drying phase. A drying program usually comprises a heating-up phase, a subsequent actual drying phase and a following cooling-down phase. During all these phases belonging to a drying program, the drum is usually rotated continuously. This also applies during the cooling-down phase when the heating is merely switched off. If the dried laundry is not removed immediately from the drum at the end of a drying program, creases can be fixed in the laundry. In order to prevent this, the drum is either rotated continuously or the drum is rotated intermittently during the subsequent anti-crease cycle.
- As a result of the continuous rotation of the drum or as a result of the intermittent rotation of the drum during the anti-crease cycle, the laundry located in the drum is increasingly loosened so that no creases can form in the laundry. The intermittent rotation of the drum is usually effected according to a fixed pattern, such as for example stoppage of the drum for two minutes followed by rotation of the drum for fifteen seconds. This intermittent operation continues either until the end of the anti-crease cycle which can last up to three or five hours or until the time when the laundry is removed from the drum. A disadvantage with this anti-crease cycle is that the laundry is exposed to further stress through the movement of the drum. The drive motor and the switching elements for switching the drive motor on and off are also further stressed by the continuous switching-on and off.
- It is the object of the present invention to provide a method and a device for drying laundry which has an anti-crease cycle during which the laundry and the components of the device are treated gently, and during which crease formation is optimally avoided and energy consumption is reduced.
- The object is achieved with regard to the method by the features of the claims. This object is achieved with regard to the device by the features of the claims. Advantageous embodiments and further developments of the invention are obtained from the dependent claims.
- In a method for drying laundry in a device comprising a rotatable drum for agitating the laundry, a drying program is followed by an anti-crease cycle, wherein the laundry is intermittently agitated.
- Since, in the course of the anti-crease cycle the agitation of the laundry decreases with time or since the agitation of the laundry during the anti-crease cycle decreases as the temperature of the laundry decreases and/or as the residual moisture of the laundry decreases, or since the agitation of the laundry during the anti-crease cycle is dependent on the pre-selected drying program and/or the pre-selected degree of drying and/or the pre-selected type of laundry, or since the agitation of the laundry during the anti-crease cycle is dependent on the amount of laundry preset by a user and/or the amount of laundry determined by the device, it is achieved that the laundry is only agitated sufficiently during the anti-crease cycle to avoid crease formation. As a result, the laundry is only minimally agitated or loosened during the anti-crease cycle and thus is treated very gently, whereby crease formation can be optimally avoided. Furthermore, the motor for turning the drum is switched on and off less frequently, and especially towards the end of the anti-crease cycle, the switch-on time of the drum movement is reduced substantially so that the components for the drum movement such as the motor, relays for switching the motor on and off and the drum bearing are less stressed and thus the lifetime and the reliability of the device is increased. Furthermore, energy is saved since the overall switch-on time of the drum movement during and in the course of the anti-crease cycle is substantially reduced.
- Since the laundry temperature and also the residual moisture is still elevated at the beginning of the anti-crease cycle, the risk of creases being fixed in the laundry is higher at the beginning of the anti-crease cycle than towards the end of the anti-crease cycle so that for optimal avoidance of crease formation, a higher proportion of agitation of the laundry is required at the beginning of the anti-crease cycle than towards the end of the anti-crease cycle. Furthermore, the proportion of agitation can be optimally matched to the pre-selected drying program or to the pre-selected degree of drying or the pre-selected type of laundry. For example, a “damp for ironing” drying program requires an overall higher proportion of agitation than a “cupboard-dry” or “very dry” drying program. In addition, the proportion of agitation can be optimally matched to the quantity of laundry located in the drum. Thus, the proportion of agitation of the laundry can be minimised for each operating state so that the laundry and the components of the device are treated gently and the energy consumption is reduced.
- In an advantageous embodiment, in order to achieve these aims the agitation of the laundry during the anti-crease cycle is therefore dependent on measured quantities and parameters which are detected in preceding phases of a drying program and/or during the anti-crease cycle.
- In this case, measured quantities and parameters which are detected during a heating-up phase at the beginning of a drying program and/or during a cooling-down phase at the end of the drying program can also be taken into account.
- In an advantageous embodiment in order to achieve the preceding aims in particular, the quantity of laundry and/or the heating-up time and/or the laundry moisture and/or the laundry moisture profile and/or the laundry specific conductance and/or the profile of the laundry specific conductance and/or the moisture content and/or the moisture profile and/or the temperature of the laundry and/or the temperature profile of the laundry and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer and/or the comparison of the moisture content and/or the moisture profile and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer between entry into the drum and exit from the drum and/or the time before reaching a drying target can thus be used as measured quantities or parameters.
- For this purpose, the rotatable drum has rotary movement time intervals and stoppage time intervals in the anti-crease cycle. During the rotary movement time intervals the drum can be turned in one direction of rotation and/or reversingly in different directions of rotation. The duration of an anti-crease cycle is preferably one to five hours.
- In a preferred embodiment, the duration of the anti-crease cycle is preferably divided into four time intervals wherein in a first time interval the proportions of agitation lie between 20% and 90%, and that in a second time interval the proportions of agitation lie between 10% and 70%, and that in a third time interval the proportions of agitation lie between 1% and 60% and that in a fourth time interval the proportions of agitation lie between 1% and 30%.
- A device for drying laundry comprises a rotatable drum for agitating the laundry and a control device which is capable of carrying out the process steps and process sequences specified hereinbefore. For this purpose, the device has a control device with an input device and a timing element. In addition, the device has sensor devices for detecting measured quantities and parameters, which are supplied to the control device and processed in the control device according to the preceding process sequences.
- Furthermore, the device for drying laundry has a heater for heating the drying air, a motor for driving the drum and a fan for conveying the drying air are provided.
- Further details, features and advantages of the invention are obtained from the following description of an exemplary embodiment of a device according to the invention for drying laundry which is capable of carrying out the preceding process steps and process sequences with reference to the drawings.
-
FIG. 1 is a device for drying laundry. - According to
FIG. 1 , a device for drying laundry comprises ahousing 1 in which adrum 2 is rotatably mounted, aloading door 3, a front bearingplate 4, aninlet duct 5 for drying air in which aheating device 6 is located, anoutlet duct 7 for drying air in which a fan 8 is located and amotor 9 which drives thedrum 2 by means of abelt 10. Also provided is acontrol device 11 comprising aninput device 12 and atiming element 13. Afirst temperature sensor 14 is arranged in theinlet duct 5 adjacent to the inlet to thedrum 2 and asecond temperature sensor 15 is arranged in theoutlet duct 7 adjacent to thedrum 2. Located on the front bearingplate 4 are twoelectrodes 16 to detect the specific conductance of the laundry and/or the drying air. Thefirst temperature sensor 14, thesecond temperature sensor 15 and the electrodes are connected to thecontrol device 11 which is capable of processing signals from the sensors and theinput device 12. The device for drying laundry described hereinbefore can also be constructed as an exhaust air dryer or a condensation dryer. - The device for drying laundry as shown in
FIG. 1 can be provided with further sensors such as laundry temperature sensors or the like in order to carry out the process sequences and process steps described hereinafter. - The process sequences and process steps described hereinafter can be carried out using the device for drying laundry described hereinbefore.
- Since, in the course of the anti-crease cycle the agitation of the laundry decreases with time or since the agitation of the laundry during the anti-crease cycle decreases as the temperature of the laundry decreases and/or as the residual moisture of the laundry decreases, or since the agitation of the laundry during the anti-crease cycle is dependent on the pre-selected drying program and/or the pre-selected degree of drying and/or the pre-selected type of laundry, or since the agitation of the laundry during the anti-crease cycle is dependent on the amount of laundry preset by a user and/or the amount of laundry determined by the device, it is achieved that the laundry is only agitated sufficiently during the anti-crease cycle to avoid crease formation. As a result, the laundry is only minimally agitated or loosened during the anti-crease cycle and thus is treated very gently, whereby crease formation can be optimally avoided. Furthermore, the motor for turning the drum is switched on and off less frequently, and especially towards the end of the anti-crease cycle, the switch-on time of the drum movement is reduced substantially so that the components for the drum movement such as the motor, relays for switching the motor on and off and the drum bearing are less stressed and thus the lifetime and the reliability of the device is increased. Furthermore, energy is saved since the overall switch-on time of the drum movement during and in the course of the anti-crease cycle is substantially reduced.
- Since the laundry temperature and also the residual moisture is still elevated at the beginning of the anti-crease cycle, the risk of creases being fixed in the laundry is higher at the beginning of the anti-crease cycle than towards the end of the anti-crease cycle so that for optimal avoidance of crease formation, a higher proportion of agitation of the laundry is required at the beginning of the anti-crease cycle than towards the end of the anti-crease cycle. Furthermore, the proportion of agitation can be optimally matched to the pre-selected drying program or to the pre-selected degree of drying or the pre-selected type of laundry. For example, a “damp for ironing” drying program requires an overall higher proportion of agitation than a “closet-dry” or “very dry” drying program. In addition, the proportion of agitation can be optimally matched to the quantity of laundry located in the drum. Thus, the proportion of agitation of the laundry can be minimized for each operating state so that the laundry and the components of the device are treated gently and the energy consumption is reduced.
- Consequently, in order to achieve these aims the agitation of the laundry during the anti-crease cycle is therefore dependent on measured quantities and parameters which are detected in preceding phases of a drying program and/or during the anti-crease cycle.
- In this case, measured quantities and parameters which are detected during a heating-up phase at the beginning of a drying program and/or during a cooling-down phase at the end of the drying program can also be taken into account.
- In order to achieve the preceding aims in particular, the quantity of laundry and/or the heating-up time and/or the laundry moisture and/or the laundry moisture profile and/or the laundry specific conductance and/or the profile of the laundry specific conductance and/or the moisture content and/or the moisture profile and/or the temperature of the laundry and/or the temperature profile of the laundry and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer and/or the comparison of the moisture content and/or the moisture profile and/or the temperature of the drying air and/or the temperature profile of the drying air in the drum of the dryer between entry into the drum and exit from the drum and/or the time before reaching a drying target can thus be used as measured quantities or parameters.
- For this purpose, the rotatable drum has rotary movement time intervals and stoppage time intervals in the anti-crease cycle. During the rotary movement time intervals the drum can be turned in one direction of rotation and/or reversingly in different directions of rotation. The duration of an anti-crease cycle is preferably one to five hours.
- In a preferred embodiment, the duration of the anti-crease cycle is preferably divided into four time intervals wherein in a first time interval the proportions of agitation lie between 20% and 90%, and that in a second time interval the proportions of agitation lie between 10% and 70%, and in a third time interval the proportions of agitation lie between 1% and 60% and that in a fourth time interval the proportions of agitation lie between 1% and 30%. In particular, in a first time interval the drum agitation is switched off for 104 s and switched on for 16 s and in a second time interval the drum agitation is switched off for 284 s and switched on for 16 s and in a third time interval the drum agitation is switched off for 584 s and switched on for 16 s, and in a fourth time interval the drum agitation is switched off for 584 s and switched on for 16 s.
- In a method for drying laundry in a device comprising a rotatable drum (2) for agitating the laundry, following a drying program an anti-crease cycle is provided wherein the laundry is intermittently agitated. This anti-crease cycle is used to avoid fixing of creases in the laundry by regular loosening of the laundry. In order to save energy and treat the laundry and the device gently, the laundry is agitated minimally in the course of the anti-crease cycle so that crease formation is avoided.
Claims (17)
1-15. (canceled)
16. A method for drying laundry in a dryer comprising a housing and a drum receiving the laundry and mounted for rotation with respect to the housing, the method comprising the acts of:
performing a drying program including a heating-up phase, a drying phase, and a cooling-down phase;
performing an anti-crease cycle having alternating intervals including rotary movement time intervals, in which the drum is rotated to agitate the laundry, and stoppage time intervals, in which the drum stops rotating and the laundry is at rest, the duration of the rotary movement intervals decreasing in relation to the stoppage time intervals in response to an operating parameter.
17. The method according to claim 16 , wherein the operating parameter includes the length of time of the anti-crease cycle.
18. The method according to claim 16 , further comprising the act of detecting the temperature of the laundry with a sensor and the operating parameter includes a decrease in the temperature of the laundry.
19. The method according to claim 16 , further comprising the act of detecting the residual moisture of the laundry with a sensor and the operating parameter includes a decrease in the residual moisture of the laundry.
20. The method according to claim 16 , wherein the operating parameter includes the pre-selected drying program selected by the user.
21. The method according to claim 16 , further comprising the act of receiving an amount of laundry in the dryer being preset by a user and the operating parameter includes the amount of the laundry.
22. The method according to claim 16 , further comprising the act of detecting an amount of laundry in the dryer with a sensor and the operating parameter includes the amount of the laundry.
23. The method according to claim 16 , further comprising the act of detecting at least one of a quantity of laundry, a heating-up time, a laundry moisture, a laundry moisture profile, a laundry specific conductance, a profile of the laundry specific conductance, a moisture content and/or the moisture profile, a temperature of the laundry, a temperature profile of the laundry, a temperature of the drying air, a temperature profile of the drying air in the drum of the laundry dryer, a comparison of the moisture content, a moisture profile, a temperature of the drying air, a temperature profile of the drying air in the drum of the laundry dryer between entry into the drum and exit from the drum, and a time before reaching a drying target.
24. The method according to claim 16 , wherein the act of performing the anti-crease cycle includes rotating the drum in opposite directions during subsequent rotary movement time intervals.
25. The method according to claim 16 , wherein the duration of the anti-crease cycle is between about one and five hours.
26. The method according to claim 16 , wherein the act of performing the anti-crease cycle includes four subsequent time intervals starting with a first time interval and ending with a fourth time interval, each time interval including the rotary movement time intervals and stoppage time intervals, the rotary time interval comprising between about 20% and 90% of the first time interval, the rotary time interval comprising between about 10% and 70% of the second time interval, the rotary time interval comprising between about 1% and 60% of the third time interval, and the rotary time interval comprising between about 1% and 30% of the fourth time interval.
27. The method according to claim 26 , wherein the duration of the rotary movement time interval remains substantially the same during each of the four subsequent time intervals and the duration of the stoppage time interval during the fourth time interval is greater than the duration of the stoppage time interval during the first time interval.
28. A laundry dryer comprising;
a housing;
a drum receiving the laundry and mounted for rotation with respect to the housing;
a motor coupled to the drum for driving rotation of the drum;
an inlet duct providing an air flow to the drum and a heating device selectively heating air in the inlet duct;
an outlet duct receiving the air flow from the drum;
a control device coupled to the motor and controlling rotation of the drum, the control device performing an anti-crease cycle including alternatingly rotating the drum during rotary movement time intervals and stopping rotation of the drum during stoppage time intervals, the control device decreasing the duration of the rotary movement intervals decreasing in relation to the stoppage time intervals in response to an operating parameter.
29. The laundry dryer of claim 28 , further comprising a timing element providing a length of time of the anti-crease cycle to the control device and the operating parameter including an increase in the length of time of the anti-crease cycle.
30. The laundry dryer of claim 28 , further comprising a temperature sensor detecting the temperature of the laundry and providing a temperature signal to the control device indicating the temperature of the laundry, the operating parameter including the temperature signal.
31. The laundry dryer of claim 28 , further comprising a electrodes detecting a moisture level of the laundry and providing a moisture signal to the control device indicating the moisture level of the laundry, the operating parameter including the moisture signal.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10360867A DE10360867A1 (en) | 2003-12-23 | 2003-12-23 | Method and apparatus for drying laundry |
DE10360867.2 | 2003-12-23 | ||
PCT/EP2004/053699 WO2005064071A2 (en) | 2003-12-23 | 2004-12-23 | Method and device for drying clothes |
Publications (1)
Publication Number | Publication Date |
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US20070209228A1 true US20070209228A1 (en) | 2007-09-13 |
Family
ID=34683822
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/584,164 Abandoned US20070209228A1 (en) | 2003-12-23 | 2004-12-23 | Method And Device For Drying Clothes |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070209228A1 (en) |
EP (1) | EP1699971B1 (en) |
AT (1) | ATE459743T1 (en) |
DE (2) | DE10360867A1 (en) |
WO (1) | WO2005064071A2 (en) |
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Also Published As
Publication number | Publication date |
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ATE459743T1 (en) | 2010-03-15 |
DE10360867A1 (en) | 2005-07-21 |
WO2005064071A3 (en) | 2006-02-23 |
EP1699971A2 (en) | 2006-09-13 |
WO2005064071A2 (en) | 2005-07-14 |
DE502004010863D1 (en) | 2010-04-15 |
EP1699971B1 (en) | 2010-03-03 |
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