EP2069566A1 - Apparatus and process for drying items of laundry, using a heat pump and a heat exchanger - Google Patents
Apparatus and process for drying items of laundry, using a heat pump and a heat exchangerInfo
- Publication number
- EP2069566A1 EP2069566A1 EP07788476A EP07788476A EP2069566A1 EP 2069566 A1 EP2069566 A1 EP 2069566A1 EP 07788476 A EP07788476 A EP 07788476A EP 07788476 A EP07788476 A EP 07788476A EP 2069566 A1 EP2069566 A1 EP 2069566A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat pump
- air flow
- channel
- process air
- heat exchanger
- 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
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000001035 drying Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000005086 pumping Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 description 85
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 206010016334 Feeling hot Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000005676 thermoelectric effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- D06F58/30—Drying processes
-
- 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
- D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
-
- 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
- D06F2105/26—Heat pumps
-
- 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
- D06F2105/28—Electric heating
-
- 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
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- 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
- D06F58/206—Heat pump arrangements
Definitions
- the invention relates to a device for drying laundry, comprising a substantially closed first channel system for guiding the process air acting on the laundry, in which first channel system, a treatment chamber for receiving the laundry, a first fan for driving the process air stream, a first cooling channel of a heat exchanger and a second heating channel of a heat pump are arranged, wherein the second heating channel along the process air flow is behind the first cooling channel, and an open second channel system for guiding a secondary air flow, in which second channel system a second fan for driving the secondary air flow, a first heating channel of the heat exchanger and a second cooling channel of the heat pump are arranged.
- the invention relates to a method for drying laundry, by means of a guided in a substantially closed first channel system and the laundry in a treatment chamber acting process air stream which cooled in a heat exchanger by a guided in an open second channel system secondary air flow and then by a heat pump Cooling of the secondary air flow is heated.
- Such a method and such a device are apparent from DE 43 30 456 C1.
- An open secondary air flow first flows through the heat pump, where it is cooled, and then through the heat exchanger to cool the process air flow. Finally, the secondary air flow returns to an environment of the device from which it was previously removed.
- the purpose is pursued to improve the condensation performance of the heat exchanger and therefore to additionally cool the secondary air flow by means of the heat pump. This is also a more compact and thus easier to handle especially for cleaning be achieved exchanger.
- the heat pump works with a circulating, cyclically alternately vaporized and liquefied refrigerant.
- EP 1 342 828 A2 describes a device which has two circuits for air flows, which are coupled to one another via a thermoelectric heat pump on the one hand and an air-air heat exchanger on the other hand for exchanging heat.
- a self-contained closed loop process air stream is heated in the heat pump and cooled in the heat exchanger, a self-contained or open cooling air flow is cooled in the heat pump and heated in the heat exchanger.
- no further functional components are provided.
- a tumble dryer is also evident from each of the documents EP 0 477 554 B1 and EP 1 108 812 B1, the disclosure of which is fully attributable to the disclosure.
- the duct system in which the air flow is guided is essentially closed - this means that the air flow circulates in the normal operation substantially without leaks, but does not assume a much higher pressure than air in the vicinity of the device.
- the treatment room for receiving the laundry is designed as a rotatable drum.
- EP 0 467 188 B1 discloses a device for drying laundry, in which a heat pump is provided instead of the conventional arrangement of cooler and heater.
- a heat pump is provided instead of the conventional arrangement of cooler and heater.
- an evaporator takes the place of the cooler, and in place of the heater, a condenser for a working fluid circulating in an associated circuit of the heat pump.
- the channel system in which the air flow circulates can be brought into contact with the environment by opening a flap, in particular to discharge part of the air stream heated during operation from the device and to replace it with relatively cool ambient air ,
- DE 14 10 206 A shows a washing machine, in which laundry not only washed, but also can be dried.
- an electric heating device for heating a laundry used for drying laundry may be used.
- a simple heat exchanger for cooling the heated air flow after the application of the laundry be provided, alternatively, a heat pump may be provided.
- This heat pump can be designed like the heat pump disclosed in EP 0 467 188 B1, it can also be a heat pump, which works with Peltier elements for the use of the thermoelectric effect.
- From DE 19 738 735 C2 discloses a device for drying laundry of the type described input, in which a heat pump is used, which operates on an absorber principle.
- An apparatus for drying laundry which in turn corresponds to the genus described in the abstract "Patent Abstracts of Japan" for JP 08 057 194 A, contains in its channel system, in addition to a thermoelectric heat pump with cold and warm branch the cold branch upstream additional heat exchanger for cooling the air flow discharged from the laundry and an additional heating device downstream of the warm branch for further heating of the air flow before the loading of the laundry.
- DE 35 09 549 A1 also discloses a device for drying laundry which, in addition to a heat pump, has a further heating device and additional heat transport devices, such as gravity heat pipes.
- the input described device and method according to EP 1 342 828 A2 have a disadvantage in that only the heat pump is available for heating the circulating process air flow. Also, the heat pump must pump the heat from its cooling channel to its heating channel via a significant temperature difference - at the outlet of the cooling channel prevails a temperature that is less than the temperature of the environment of the device is. With the corresponding cooling of the secondary air flow, it may optionally come to condensation of moisture in the secondary air flow, which may lead to a burden of the device with unwanted moisture and hygienic problems under certain circumstances.
- An object of the invention to be disclosed below is to further develop the device and the method according to EP 1 342 828 A2 in that improved heating of the process air flow and a better operating point of the heat pump are achieved.
- an apparatus for drying laundry comprising a substantially closed first channel system for guiding a process air flow acting on the laundry, in which first channel system a treatment chamber for receiving the laundry, a first fan for driving the process air flow, a first Cooling channel of a heat exchanger and a second heating channel of a heat pump are arranged, wherein the second heating channel along the process air flow is behind the first cooling channel, and an open second channel system for guiding a secondary air flow, in which second channel system, a second fan for driving the secondary air flow, a first heat channel of the heat exchanger and a second cooling channel of the heat pump are arranged, and in which device in the first channel system, a heater for heating the process air flow is arranged, and the second cooling channel along the Se the secondary air flow is behind the first heating channel.
- a process for drying laundry by means of a process air stream guided in a substantially closed first channel system and acting on the laundry located in a treatment chamber, which is cooled in a heat exchanger by a secondary air flow guided in an open second channel system and thereafter is heated by a heat pump with cooling of the secondary air flow, in which method the process air flow is heated by a heater arranged in the first channel system and the cooling of the secondary air flow takes place behind the heat exchanger.
- the process air flow is heated not only by the heat pump, but also by a special heater, which according to conventional practice can be designed as an electrical resistance heater.
- the heat pump is inserted into the second channel system for the secondary air flow so that it does not cool the secondary air flow until it has absorbed heat from the process air flow in the heat exchanger and thus lost relative humidity. Therefore, the heat exchanging components of the heat pump are exposed to moisture exposure only to a small extent, resulting in a particularly low tendency to corrosion and, accordingly, an advantage of extended life.
- the process air flow and the secondary air flow with a particularly low temperature difference into the corresponding heat pump channels are assumed, so that they operate at a relatively low temperature difference averaged over their entire active volume and thus particularly favorable conditions can. This ensures a good efficiency of the heat pump.
- the heat introduced by the heater into the process air flow is no longer or less completely lost in the secondary air flow in the device according to the invention or in the method according to the invention, but is recovered with the heat pump and returned to the process air flow. Even if this recovery is not complete, but can be achieved by suitable design of the heater, the heat exchanger and the heat pump that the device meets the requirements of the known energy consumption class A.
- a preferred embodiment of the device is characterized in that the heater along the process air flow is arranged immediately in front of the treatment chamber. Such an undesirable loss of heat is kept low.
- the first fan along the process air flow is located immediately in front of the heater; so that the thermal load of the fan remains very small.
- the second fan is arranged along the secondary air flow in front of the first heating channel. This arrangement is particularly favorable for the construction of the device.
- first and second blowers should be noted that they have proven themselves in prior art devices, but are not necessarily mandatory for the functional success of the device according to the invention.
- Other arrangements for example, the first fan behind instead of in front of the drum or the second blower behind instead of before the first heating channel, are conceivable and, in particular depending on the arrangement of the components of the device in a conventional housing for a corresponding domestic appliance, also advantageous.
- the first channel system downstream of the first cooling channel to a separator for the separation of moisture from the process air flow on;
- a separator for the separation of moisture from the process air flow on;
- the separator can be constructively connected to the heat exchanger according to current practice.
- separation of the condensate from the process air flow is an important criterion for achieving high efficiency, since in the process air flow remaining condensate must be evaporated again in the subsequent heating of the process air flow, which requires additional energy and thus the efficiency impaired the device during operation.
- the device to the effect that the heater and the heat exchanger are set up for drying the laundry without using the heat pump.
- This development is favorable because it allows operation even without the heat pump as at least unusual component, albeit with some loss in terms of the energy to be used.
- the device thus achieves the reliability that is required for a conventional laundry. is common, without it depends on the characteristics of the heat pump used.
- the heater is designed for a maximum heating power of at most 2700 W, in particular about 2000 W.
- the heat exchanger has a cooling capacity of at least 1000 W, in particular about 1500 W.
- a particularly preferred development of the device has a heat pump with a thermoelectric pump unit.
- a pumping unit is very compact and simple, and therefore particularly suitable for use in a device designed as a tumble dryer.
- the particularly low load on the heat exchanging components has a particularly advantageous effect in such a heat pump, since in this case the problem of avoiding an impairment of the electrical components, the concept of the heat exchange components are immediately adjacent, to a much lesser extent than in such a heat pump in a device of the prior art.
- thermoelectric pumping unit to be used in accordance with the invention has a power consumption of about 500 W, the heater in the corresponding apparatus being arranged for selective operation at a high level with a power consumption of about 2000 W and at a low level with a power consumption of about 500 W, and wherein the heater and the pump unit are arranged to control such that the pump unit is operated in common with the heater.
- FIG. 1 shows a device for drying laundry with a heat pump and a heat exchanger.
- FIG. 2 shows a detail of such a device, comprising a compressor heat pump
- FIG. 3 shows a detail of a device according to FIG. 1, comprising a thermoelectric heat pump.
- FIG. 1 is a substantially closed first channel system 3, in which a process air stream 4 (symbolized by a straight arrow outside the channel system 3) circulates.
- a treatment chamber 5 in the form of a rotatable drum 5 is provided.
- the laundry 2 is introduced into the drum 5 and there acted upon by the process air stream 4.
- the process air stream 4 is driven by a first blower 6, which is part of the first duct system 3.
- the process air stream 4 passes into a first cooling channel 7 of a heat exchanger 7, 8. There it is cooled so that the entrained moisture condenses and by means which not shown in Figure 1 represents are separated from the process air stream 4 and discharged.
- a first heating channel 8 in the heat exchanger 7, 8 is acted upon by a secondary air flow 13 (likewise symbolized by a straight arrow) guided into an open second channel system 12, which is driven by a second fan 14.
- the secondary air stream 13 absorbs heat from the process air stream 4 in the heat exchanger 7, 8.
- the process air stream 4 and the secondary air stream 13 reach a heat pump 9, 10, 11, comprising a second heating channel 9, into which the process air stream 4 passes, a second cooling channel 11, in which the second där Kunststoffstrom 13 passes, and a pump unit 10, which internal heat exchanger of the heat pump 9, 10, 1 1, which are arranged in the channels 9 and 1 1 and the flowing air streams heat or cool applied.
- a heat pump 9, 10, 11 comprising a second heating channel 9, into which the process air stream 4 passes, a second cooling channel 11, in which the second där Kunststoffstrom 13 passes, and a pump unit 10, which internal heat exchanger of the heat pump 9, 10, 1 1, which are arranged in the channels 9 and 1 1 and the flowing air streams heat or cool applied.
- the second heating channel 9 of the heat pump 9, 10, 1 1 of the cooled in the heat exchanger 7, 8 process air stream 4 is reheated, by heat, which is taken according to the bent arrow the secondary air stream 13 in the second cooling channel 1 1, and in addition the waste heat , which is generated during operation of the heat
- the secondary air stream 13 is taken from an environment of the device 1 and passes back into this environment, after he has passed through the second channel system 12.
- it is first heated by heat, which is taken from the process air stream 4.
- the Sekundär Kunststoff- ström 13 is cooled again, so that the heat that was taken from the process air stream 4 in the heat exchanger 7, 8, this at least partially re-flows.
- FIG 2 shows a section of the recognizable in Figure 1 device. Shown are the heat exchanger 7, 8, the heat pump 9, 10, 1 1 and a separator 16 for the separation of condensate, which has formed in the process air stream 4 after flowing through the first cooling channel 7.
- the heat pump 9, 10, 1 1 comprises two internal heat exchangers, which form the second heating channel 9 and the second cooling channel 11, and a pump unit 10, which includes a compressor and a throttle. Accordingly, the heat pump 9, 10, 1 1 is a compressor heat pump, as it is known from a conventional refrigerator or freezer.
- the configuration according to FIG. 3 differs from the configuration according to FIG. 2, to which reference is made, instead of a renewed description, by a thermoelectric heat pump 9, 10, 11.
- the pump unit 10 contains a circuit with Peltier elements, which are to be understood as meaning special electronic components.
- a Peltier element has two poles between which a temperature difference arises when an electric current flows from one pole to the other pole.
- the integration of such Peltier elements in a pump unit 10 is basically known and requires this point no explanation.
- In the second heating channel 9 and in the second cooling channel 1 1 are heat conducting 17, which are thermally conductive connected to the pump unit 10 and provide for the exchange of heat between the channels 9 and 1 1 via the pump unit 10.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006042991A DE102006042991A1 (en) | 2006-09-13 | 2006-09-13 | Apparatus and method for drying laundry with a heat pump and a heat exchanger |
PCT/EP2007/058562 WO2008031688A1 (en) | 2006-09-13 | 2007-08-17 | Apparatus and process for drying items of laundry, using a heat pump and a heat exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2069566A1 true EP2069566A1 (en) | 2009-06-17 |
EP2069566B1 EP2069566B1 (en) | 2010-04-07 |
Family
ID=38722784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07788476A Active EP2069566B1 (en) | 2006-09-13 | 2007-08-17 | Apparatus and process for drying items of laundry, using a heat pump and a heat exchanger |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100083524A1 (en) |
EP (1) | EP2069566B1 (en) |
AT (1) | ATE463608T1 (en) |
DE (2) | DE102006042991A1 (en) |
WO (1) | WO2008031688A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2631351A1 (en) | 2012-02-23 | 2013-08-28 | Electrolux Home Products Corporation N.V. | Laundry dryer |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006026251A1 (en) * | 2006-06-06 | 2007-12-13 | BSH Bosch und Siemens Hausgeräte GmbH | Apparatus and method for drying laundry |
DE102008044277A1 (en) * | 2008-12-02 | 2010-06-10 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with a heat pump and an electric heater and method of operation |
US9157179B2 (en) | 2009-06-29 | 2015-10-13 | Arcelik Anonim Sirketi | Laundry dryer the drying effectiveness of which is increased by using different heat sources |
EP2372012B1 (en) * | 2010-03-30 | 2016-08-31 | DBK David + Baader GmbH | Condenser unit, household appliance, and method for controlling such a household appliance |
DE102010043455A1 (en) * | 2010-11-05 | 2012-05-10 | BSH Bosch und Siemens Hausgeräte GmbH | Drying device and household appliance with such a drying device |
ITRN20110055A1 (en) * | 2011-08-05 | 2013-02-06 | Indesit Co Spa | APPLIANCE |
EP2796613B1 (en) * | 2013-04-23 | 2020-11-11 | Whirlpool Corporation | Dryer or washer dryer and method for its operation |
KR102364673B1 (en) | 2014-10-28 | 2022-02-18 | 엘지전자 주식회사 | Laundry Machine and Control Method of the Laundry Machine |
WO2016127373A1 (en) * | 2015-02-12 | 2016-08-18 | 佛山市顺德区美的洗涤电器制造有限公司 | Dish-washing machine |
DE102016214753A1 (en) * | 2016-08-09 | 2018-02-15 | BSH Hausgeräte GmbH | Laundry treatment device |
TR201721922A2 (en) | 2017-12-26 | 2019-07-22 | Arcelik As | HEAT PUMP SYSTEM IN DRYING WASHING MACHINES |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2914859C2 (en) * | 1979-04-12 | 1986-11-06 | Bauknecht Hausgeräte GmbH, 7000 Stuttgart | Clothes dryer |
DE3113471A1 (en) * | 1981-04-03 | 1982-10-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Drying appliance with a heat pump |
DE4330456C1 (en) * | 1993-09-08 | 1995-03-16 | Blomberg Werke Gmbh | Tumble dryer |
DE4434205A1 (en) * | 1994-08-31 | 1996-03-07 | Joerg Sdrojewski | Laundry dryer with laundry drum |
DE19731826A1 (en) * | 1997-07-24 | 1998-02-12 | Joachim Rieder | Laundry dryer for sensitive fabrics |
DE20101641U1 (en) * | 2001-01-29 | 2002-06-06 | AKG-Thermotechnik GmbH & Co. KG, 34369 Hofgeismar | Condensation dryer and suitable condensation heat exchanger |
DE20202782U1 (en) * | 2002-02-21 | 2002-04-25 | Blum, Theodor, 79241 Ihringen | clothes dryer |
KR100504503B1 (en) * | 2003-01-14 | 2005-08-01 | 엘지전자 주식회사 | air conditioning system |
-
2006
- 2006-09-13 DE DE102006042991A patent/DE102006042991A1/en not_active Withdrawn
-
2007
- 2007-08-17 WO PCT/EP2007/058562 patent/WO2008031688A1/en active Application Filing
- 2007-08-17 DE DE502007003423T patent/DE502007003423D1/en active Active
- 2007-08-17 AT AT07788476T patent/ATE463608T1/en active
- 2007-08-17 EP EP07788476A patent/EP2069566B1/en active Active
- 2007-08-17 US US12/310,953 patent/US20100083524A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2008031688A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2631351A1 (en) | 2012-02-23 | 2013-08-28 | Electrolux Home Products Corporation N.V. | Laundry dryer |
WO2013124226A1 (en) | 2012-02-23 | 2013-08-29 | Electrolux Home Products Corporation N.V. | Laundry dryer |
Also Published As
Publication number | Publication date |
---|---|
WO2008031688A1 (en) | 2008-03-20 |
US20100083524A1 (en) | 2010-04-08 |
EP2069566B1 (en) | 2010-04-07 |
DE502007003423D1 (en) | 2010-05-20 |
ATE463608T1 (en) | 2010-04-15 |
DE102006042991A1 (en) | 2008-03-27 |
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