EP2300656A1 - Method for cleaning the heat exchanger of a dryer - Google Patents
Method for cleaning the heat exchanger of a dryerInfo
- Publication number
- EP2300656A1 EP2300656A1 EP09757494A EP09757494A EP2300656A1 EP 2300656 A1 EP2300656 A1 EP 2300656A1 EP 09757494 A EP09757494 A EP 09757494A EP 09757494 A EP09757494 A EP 09757494A EP 2300656 A1 EP2300656 A1 EP 2300656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- cleaning
- care
- cleaning process
- rinsing liquid
- 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.)
- Withdrawn
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
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
Definitions
- the invention relates to a method for cleaning a component of a household appliance for the care of laundry items, wherein in a cleaning process at least once rinsing liquid is passed through the component and the component is thereby cleaned of foreign bodies.
- a heat pump cycle in particular in a tumble dryer, comprises two heat exchangers whose heat extracts a heat from the process air and thus acts as a heat sink, the other of which supplies heat to the process air and thus acts as a heat source, and a pumping means by which heat is pumped from the heat sink to the heat source.
- the pumping means is a circuit in which circulates a working fluid. The working fluid flows the heat sink in a liquid state and is evaporated there by absorbing heat from the process air. Therefore, the heat sink acts as an evaporator and is commonly referred to as such. The vaporized working fluid gets into circulation to a compressor and is compressed there.
- the heat source in this heat pump acts as a condenser and is commonly used as well designated.
- the liquid working fluid is then released in the circuit at a throttle, which may be designed as a valve, nozzle or capillary, lowering its internal pressure and finally passes back to the evaporator, where it evaporates again and where the circuit closes.
- the cleaning process is assigned to a special cleaning program of the household appliance.
- This cleaning process is started by explicitly selecting the cleaning program by a user of the domestic appliance.
- a procedure is performed here in which the cleaning process is started manually by a user.
- the selection of the cleaning program and thus the start of the special cleaning program is carried out exclusively by the explicit selection by the user.
- the household appliance is thus provided its own special cleaning program. The cleaning of the component can thus be done user-defined at desired times.
- the component is preferably designed as a heat sink, in particular an evaporator, of a heat pump circuit in the domestic appliance, and thus the heat sink is freed from these foreign bodies by this introduction of the rinsing liquid.
- This heat pump cycle also includes a heat source, in particular a condenser.
- the component lint as a foreign body, which are flushed out by the rinsing liquid.
- the household appliance is a tumble dryer or a washer-dryer, lintings are produced during the drying process, which are torn off from the items of laundry to be dried and carried in the process air stream.
- the user is made aware of the required initiation of the cleaning process by an acoustic and / or visual signal, which is generated by the domestic appliance.
- an acoustic and / or visual signal which is generated by the domestic appliance.
- a degree of volatilization of the component which can be detected, for example, via a suitable sensor system on the component or elsewhere in the domestic appliance, an early indication to the user can be given. Excessive leaching can thereby be prevented, and it can always be given the timely indication to the user to initiate the cleaning program.
- a process air blower of the domestic appliance is switched off for the duration of the cleaning process. This allows the front area of the heat sink to be cleaned evenly.
- the process air blower does not necessarily have to be switched off during the entire cleaning process.
- the air flow generated by the process air blower and the static and dynamic air pressure caused thereby may, if appropriate, transport the cleaning liquid to the heat source and remove any impurities present there.
- the rinsing liquid is filled explicitly by the user himself before starting the cleaning process in a container of the domestic appliance.
- at least one rinsing cycle is carried out, in which rinsing liquid is passed through the component at least twice, separated from one another in time.
- the start of the cleaning process by the user is performed only after the end of a care program performed;
- this manual start by the user can only be carried out after completion of this care program.
- This can prevent the user from starting the cleaning program in unwanted phases of an ongoing care program, thereby preventing unwanted process overlaps or even functional conflicts of components of the household appliance, which are then required both for the cleaning process and for the care process.
- a separate washing program By a separate washing program, the number of cleaning cycles can be increased so that stubborn dirt softened and rinsed by the component surfaces, in particular the heat exchanger surfaces.
- Such a separate washing program is independent of the normal drying program and is specially selected by the user. The user is reminded at regular intervals by the control of the domestic appliance to start this separate washing program or cleaning program.
- a further aspect of the invention relates to a method for cleaning a component of a domestic appliance for the care of laundry items, wherein in a cleaning process at least once rinsing liquid is passed through the component and the component is cleaned of foreign bodies.
- the cleaning process is started automatically and at least one rinsing cycle is carried out with at least one introduction of the rinsing liquid into the component depending on the degree of care of the items of laundry achieved during a care process.
- suitable rinsing cycles are incorporated in the automatic and time programs of the domestic appliance and the cleaning or starting and completion of the cleaning process is performed by automatic control user-independent.
- a first rinsing cycle is carried out with at least one, in particular two, introduction of the rinsing liquids into the component at a degree of care in which the items of laundry have a first degree of dryness of between 10% and 30%, in particular 15%.
- This degree of dryness is usually described as a degree of dryness that is poor in dampness. Rinsing just to this
- Degree of dryness has the significant advantage that at this point in time, usually at normal household loads and initial moisture enough condensate has collected, which can then be used as a rinsing liquid to good
- Heat exchanger have already accumulated, not yet dried too strong, as they are still kept slightly moist by flowing condensate and can be rinsed off better.
- a second rinsing cycle is carried out with at least a single, in particular a two-time, introduction of the rinsing liquid into the component at a second drying degree which is greater than the first degree of drying.
- the duration of the second rinse cycle is subtracted.
- the time of starting the second rinse cycle is set less than or equal to five minutes before the end time of the care process.
- the second rinse cycle is performed for a period between two minutes and five minutes. This second rinsing cycle is thus carried out shortly before reaching the final set drying degree, which is then referred to as cupboard dry, extra dry etc.
- the rinsing is carried out automatically at suitable times, whereby a significant influence on the cleaning effect on the component can be achieved.
- the focus is basically on the end of the care process, in particular the selected drying program, since there most fluff arise.
- At least one further rinsing cycle is carried out with at least one single introduction of rinsing liquid into the component after the end of the care process, in particular the drying process, during a process of the domestic appliance for preventing creasing of the treated items of laundry, which, however, is still in the Household appliance are located.
- This further rinsing cycle is in particular carried out automatically controlled. It is thus preferably carried out a further rinsing after completion of drying.
- the program section "crease protection" as standard used in almost all dryers program section has the task at regular intervals to lighten the laundry items by briefly rotating the drum with simultaneous air flow, so that do not form wrinkles, if the user is not timely to the drying end for unloading present
- this procedure may be used to prevent creasing of the laundry items for a period of, for example, one to two hours after the actual end of the original care process, especially the drying process.
- a further aspect of the invention relates to a method for cleaning a component of a domestic appliance for the care of laundry items, wherein in a cleaning process at least once rinsing liquid is passed through the component and the component is cleaned of foreign bodies.
- the cleaning process is automatically controlled after the end of a selected care process, in particular a drying process, during a time-subordinate process of the domestic appliance for preventing creasing of the laundry items, in particular the well-kept and dried laundry items carried out.
- a clear improvement of the cleaning effect and thus the liberation of the component from foreign bodies can thus be ensured.
- this improvement can be achieved through a specific process design and through additional process steps.
- a preferred embodiment of the invention in particular with regard to the further aspect just explained, provides that during the cleaning process, a process air blower of the domestic appliance is switched off for the duration of the cleaning process. This ensures a good and uniform cleaning of the component, in particular in that area which has flowed during the operation of process air.
- the process air blower of the domestic appliance does not necessarily have to be switched off permanently during a cleaning process.
- a further preferred embodiment of the invention provides that during the cleaning process, the process air blower of the domestic appliance is switched on for a part of the duration of the cleaning process, wherein a further component of the domestic appliance is cleaned by the rinsing liquid.
- a cleaning process at least once rinsing liquid through the component, which is designed as a heat exchanger, in particular evaporator, is passed, and the evaporator is cleaned by formed as lint foreign bodies.
- the cleaning process is associated with a specific cleaning program, and the cleaning process is started exclusively by selecting the cleaning program by a user of the domestic appliance.
- Trained as a laundry dryer domestic appliance includes a heat pump, which is associated with the evaporator.
- the user then first of all introduces into a suitable container, in particular the condensate container of the tumble dryer, rinsing liquid, in particular water. Subsequently, this special cleaning program or this separate washing program is then selected and started by the user.
- the condensate tank is already filled automatically with the condensate accumulated during operation of the clothes dryer and this condensate is used as flushing liquid. An explicit filling of this condensate tank by the customer with water is then not required.
- the starting and selection of the cleaning program and thus also the starting of the cleaning process can only take place in the exemplary embodiment if the previously performed and selected drying process has already ended.
- a rinsing cycle is then carried out in which rinsing liquid is passed through the evaporator.
- rinsing liquid is passed through the evaporator.
- the pump which pumps the condensate into the condensate tank, is switched off. Then, it is waited for a specific period of time, which is five seconds in the embodiment. After elapse of this period, the above-mentioned valve is deactivated again and the pump is switched on permanently. This waits for another period of time, which is 49 seconds in the embodiment.
- a pumping cycle is performed in which is pumped for a specific period of time, in particular ten seconds, and then for a further specific period of time, in the embodiment, five seconds, no pumping is performed. Following such an on-off cycle is waited for another period of time, in the embodiment 69 seconds.
- This cycle of a single power-up and a single power off and a single wait is then repeated several times, in particular repeated ten times. Following this, it is again waited for a specific period of time, 48 seconds in the embodiment.
- a pumping cycle is again carried out in which a pumping takes place for a specific period of time, in particular 30 seconds, and then no pumping is subsequently carried out for a further specific period of time, in particular 90 seconds. Thereafter, a signal may indicate that the end of this specific wash program has been reached. In particular, the condensate container can then be emptied by the user.
- a method for cleaning an evaporator of a tumble dryer is performed, wherein in a cleaning process at least once rinsing liquid is passed through the evaporator, and the evaporator is cleaned of lint.
- the cleaning process is started automatically and at least one rinsing cycle with at least one introduction of the rinsing liquid into the vaporizer is carried out as a function of the achieved degree of care of the items of laundry during a care process. Rinsing is carried out in particular only when the process air blower is switched off.
- a first rinse cycle with two rinses when reaching the degree of dryness is performed poorly ironed to iron, which at a Degree of drying between 10% and 30%, in particular 15%, is the case.
- a second rinse cycle is carried out at the end of the drying process, whereby here also two rinses, one for dissolving and the other for rinsing the lint, carried out, this being done shortly before reaching the final set degree of dryness.
- the degree of drying here is preferably cup-dry, extra-dry etc. This is determined by subtracting a specific period of time from the imaginary time end of this drying process during the drying process and then carrying out the second rinsing cycle within this withdrawn period before the end of the drying process.
- the second rinse cycle is performed for a period between two minutes and five minutes.
- a rinsing cycle comprises a rinsing twice in the form of the rinsing operations, each with a specific time duration as a break in between, which may be, for example, 120 seconds.
- a display "FLU" is then displayed flashing at a rinsing cycle.
- a motor which is preferably designed to drive the drum of the tumble dryer and to drive the process air blower, is switched off as well as the compressor of the heat pump of the tumble dryer
- said valve is activated and the pump for pumping the condensate is switched off, followed by waiting for a specific period of time, in the exemplary embodiment, five seconds, subsequently the valve is deactivated and the pump is permanently switched off
- the system waits again for a specific period of time, in the exemplary embodiment one second, and then the above-mentioned motor is switched on again and waited for a specific period of time, in particular 49 seconds leads, in which for a certain period of time, in particular 10 seconds, a pump
- the display "FLU" is turned off and waited for a specific period of time, in particular 48 seconds, followed by a pumping cycle in which a pumping takes place for a specific period of time, in particular 30 seconds, and then stops for another one specific time, in particular 90 seconds, a pump.
- At least one further rinsing cycle is carried out with at least one single introduction of rinsing liquid into the vaporizer during a process for preventing the already dried items from being wrinkled.
- a tumble dryer during a cleaning process at least once rinsing liquid is passed through the heat exchanger and the heat exchanger is cleaned of lint.
- the cleaning process is automatically started after the end of a drying process and another rinsing cycle is carried out during the cleaning process with at least a single introduction of rinsing liquid into the heat exchanger during a process of the clothes dryer to prevent creasing of the laundry items.
- a further cleaning process is also carried out during the ongoing drying process is left open in this further embodiment and can be optionally provided. This additional optional cleaning process during the current drying process can then be carried out in particular according to the above-described sequence.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008026788A DE102008026788A1 (en) | 2008-06-04 | 2008-06-04 | Method for cleaning the heat exchanger of a dryer |
PCT/EP2009/056665 WO2009147113A1 (en) | 2008-06-04 | 2009-05-29 | Method for cleaning the heat exchanger of a dryer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2300656A1 true EP2300656A1 (en) | 2011-03-30 |
Family
ID=40911955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09757494A Withdrawn EP2300656A1 (en) | 2008-06-04 | 2009-05-29 | Method for cleaning the heat exchanger of a dryer |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110056523A1 (en) |
EP (1) | EP2300656A1 (en) |
CN (1) | CN102057099B (en) |
DE (1) | DE102008026788A1 (en) |
WO (1) | WO2009147113A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007052839A1 (en) * | 2007-11-06 | 2009-05-07 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with heat pump circuit |
EP2471998B1 (en) * | 2011-01-04 | 2019-04-10 | Electrolux Home Products Corporation N.V. | Appliance for drying laundry |
CN104785466B (en) * | 2015-05-05 | 2017-10-27 | 武汉鑫丞科技有限公司 | A kind of intelligent circulating cooling water- to-water heat exchanger automatic on-line purging system and method |
CN106884292A (en) * | 2015-12-15 | 2017-06-23 | 青岛海尔滚筒洗衣机有限公司 | A kind of efficient clothes washer/dryer and control method |
DE102018202385B4 (en) * | 2018-02-16 | 2023-03-02 | BSH Hausgeräte GmbH | Apparatus for drying laundry and method of operating such an apparatus |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4397101A (en) * | 1981-09-10 | 1983-08-09 | General Electric Company | Automatic dryer control |
DE3738033A1 (en) * | 1987-11-09 | 1989-05-18 | Bosch Siemens Hausgeraete | DEVICE FOR MONITORING A HOUSEHOLD LAUNDRY DRYER |
DE3738031C2 (en) | 1987-11-09 | 1995-10-12 | Bosch Siemens Hausgeraete | Method and device for removing lint from a condensate separator designed as a heat exchanger |
IT1243685B (en) | 1990-07-24 | 1994-06-21 | Eurodomestici Ind Riunite | DEVICE FOR THE CLEANING OF AN EVAPORATOR, PROVIDED FOR IN A MACHINE-DRYER OR SIMILAR, FROM ELEMENTS RELEASED BY CLOTHING OR SIMILAR PRESENT IN THE BASKET OF SUCH MACHINE |
DE4333901C2 (en) * | 1993-10-05 | 1999-04-08 | Bauknecht Hausgeraete | Tumble dryer |
IT1284443B1 (en) * | 1996-06-26 | 1998-05-21 | Candy Spa | DOMESTIC WASHING MACHINE WITH CLOSED DRYING CIRCUIT, AIR CONDENSATION OF THE STEAM AND SELF-CLEANING FILTER |
DE19704420A1 (en) * | 1997-02-06 | 1998-08-13 | Aeg Hausgeraete Gmbh | Condensation laundry dryer |
DE19943125A1 (en) | 1999-04-30 | 2000-11-02 | Bsh Bosch Siemens Hausgeraete | Cleaning section of process air current guide in domestic dryer involves flooding part of guide with liquid |
DE10002743B4 (en) * | 2000-01-22 | 2006-01-12 | Whirlpool Corp., Benton Harbor | Heat pump tumble dryer with cleaning device for the heat exchanger |
US8024948B2 (en) * | 2005-07-28 | 2011-09-27 | Sharp Kabushiki Kaisha | Drum type drying and washing machine |
DE102006007420A1 (en) * | 2006-02-17 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning device for a component within a process air cycle of a household laundry drier |
DE602006015430D1 (en) * | 2006-05-02 | 2010-08-26 | Electrolux Home Prod Corp | Drying program with anti-crease function and dryer |
CN101387059B (en) * | 2007-09-11 | 2010-11-03 | 博西华电器(江苏)有限公司 | Control method of clothing washing facility with drying program |
-
2008
- 2008-06-04 DE DE102008026788A patent/DE102008026788A1/en not_active Withdrawn
-
2009
- 2009-05-29 CN CN2009801207887A patent/CN102057099B/en not_active Expired - Fee Related
- 2009-05-29 WO PCT/EP2009/056665 patent/WO2009147113A1/en active Application Filing
- 2009-05-29 EP EP09757494A patent/EP2300656A1/en not_active Withdrawn
- 2009-05-29 US US12/991,456 patent/US20110056523A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009147113A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102057099B (en) | 2013-03-20 |
CN102057099A (en) | 2011-05-11 |
DE102008026788A1 (en) | 2009-12-10 |
US20110056523A1 (en) | 2011-03-10 |
WO2009147113A1 (en) | 2009-12-10 |
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