EP3791016A1 - Laundry dryer - Google Patents
Laundry dryerInfo
- Publication number
- EP3791016A1 EP3791016A1 EP18723480.2A EP18723480A EP3791016A1 EP 3791016 A1 EP3791016 A1 EP 3791016A1 EP 18723480 A EP18723480 A EP 18723480A EP 3791016 A1 EP3791016 A1 EP 3791016A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- condenser
- laundry dryer
- drum
- laundry
- 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.)
- Pending
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
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
-
- 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
-
- 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
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
-
- 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
-
- 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
- D06F58/22—Lint collecting arrangements
-
- 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
-
- 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
Definitions
- the present invention relates to a domestic laundry-dryer, i.e. to a household device for drying laundry. In one aspect, it relates to a washer-dryer, i.e. laundry dryer that can also wash laundry.
- a domestic laundry-dryer i.e. to a household device for drying laundry.
- a washer-dryer i.e. laundry dryer that can also wash laundry.
- the problem to be solved by the present in- vention is therefore to provide a compact domestic laun dry dryer.
- the invention relates to a laun- dry dryer with a cabinet and a drum, wherein the drum is rotatably placed within the cabinet.
- the drum has an essentially cylindrical shape with the axis of the cylinder extending horizontally within the cabi net .
- the drum has an opening at its front side for loading the laundry, and it is closed at its back side, i.e. at the end of the drum facing away from the front side .
- the laundry dryer further comprises a heat pump with a condenser and an evaporator.
- the condenser and the evaporator are arranged on the back side of the drum.
- the laundry dryer further comprises an air circulating system connecting the drum to the condenser and the evaporator.
- the air circulating system comprises a ventilator configured to circulate the air in the sys tem from the drum to the evaporator, the condenser, and back to the drum.
- the ventilator is lo cated between the condenser and the drum, i.e. the air from the condenser passes the ventilator and then enters the drum.
- the laundry drier further comprises a control unit adapted and structured to control the operation of the individual components of the device.
- At least part of the condenser and of the evaporator are arranged at the back side of the drum.
- at least part of the condenser and the evaporator are arranged be hind the drum. This allows to exploit space behind the drum.
- the laundry dryer is configured to be a washer- dryer with a tub.
- the drum is rotatably arranged in the tub.
- the tub retains the process water while washing the laundry .
- the laundry dryer can be configured to be a dryer only and to perform only a drying of the laundry. In this embodiment, no tub is required .
- the condenser and the evaporator are arranged above each other .
- the condenser is positioned vertically above at least a part of the evaporator. In other words, when seen from above, the condenser and evaporator overlap.
- At least part of a lower end of the condenser is adjacent to at least part of an upper end of the evaporator.
- the lower end of the condenser fully aligns with the upper end of the evaporator .
- Arranging the evaporator below the condenser provides a compact design. Further, it prevents water from the evaporator from entering the condenser as well as from entering the parts of the air ducts that lead air from the condenser back to the drum.
- the condenser and/or the evaporator horizontally extends along at least 60%, in particular at least 75%, of the full width of the cabinet, therefore, exploiting the space within the cabinet.
- the width of the condenser and/or the evaporator is defined to be the widest exten sion of the condenser or evaporator in the horizontal di rection perpendicular to the rotation axis of the drum.
- At least a section of the condenser and/or the evaporator is arranged horizontally behind the drum.
- at least part of the condenser and/or the evaporator is hidden behind it.
- the condenser as well as the evaporator comprise plates for exchanging heat between the fluid ducts of the heat pump and the process air. Said plates can be aligned vertically .
- the shortest distance between individual plates of the condenser is larger than the shortest distance between individual plates of the evapo rator.
- the distance between the plates of the condenser can be at least twice the distance between the plates of the evaporator.
- the laundry dryer comprises a water trough arranged below the evaporator. It can be configured and positioned to col lect water, in particular condensed water and/or rinsing water, from the evaporator and or condenser. Further, a water duct connecting the trough to the tub can be pro vided .
- the laundry dryer comprises at least one first rinsing duct.
- Said first rinsing duct is arranged adjacent to the evaporator and has or is connected to a plurality of nozzles di rected towards the evaporator.
- a further advantageous embodiment comprises at least one further rinsing duct having or being connected to a plurality of nozzles directed towards the evaporator and/or condenser.
- the further rinsing duct is advantageously arranged above the first rinsing duct.
- the laundry dryer comprises three or four rinsing ducts.
- the first rinsing duct and the further rinsing duct are mounted directly onto a housing forming an air duct around the evaporator and/or the condenser.
- said first and further rinsing ducts are adapted to rinse lint from the conden ser and/or evaporator.
- the rinsing ducts are advantageously fed by either water already processed during the washing cycle or by fresh water.
- the device comprises a lint filter arranged in the air circulation system between the drum and the evaporator, i.e. the air from the drum has first to pass the lint filter before it reaches the evaporator, thus reducing the amount of lint accumulating in the evaporator.
- the water duct further comprises a siphon.
- a siphon is an essentially "U"-shaped duct sec tion that forms a trap for water, such that after flush- ing, an amount of residual water is retained in the si phon.
- the siphon prevents air from passing through the water duct (and thereby circumventing the filter) while drying the laundry.
- the lowest part of the lint filter is arranged higher than a lower end of the evaporator, in particular higher than all the evaporator. This makes it unlikely that water from the evaporator flows into the lint filter.
- a further advantageous embodiment of the in vention is free of any lint filter apart from the evaporator and condenser.
- the air circulation system does not comprise any dedicated lint filter.
- the water duct can be used to guide the moisture-loaded air from the drum to the evapo rator and also as a drain for guiding condensed water and rinsing water from the evaporator to the tub or a drain pipe .
- Fig. 1 shows a first perspective view of a laundry dryer from with its housing represented in dashed lines only
- Fig. 2 shows a second perspective view of the laundry dryer of Fig. 1,
- Fig. 3 shows the assembly of the heat ex changing device, the water duct, and the laundry recipi ent
- Fig. 4 shows a rear view of Fig. 3 with the heat exchanging device and the laundry recipient
- Fig. 5 shows the heat exchanging device only, with the rinsing ducts in partially cut-off view
- Fig. 6 shows a sectional view along line A-A of Fig. 5;
- Fig. 7 shows a schematic of a laundry dryer without a lint filter
- Fig. 8 shows a schematic of a laundry dryer with a lint filter.
- Figs . 1 and 2 show an embodiment of a washer dryer comprising a laundry recipient 1 with a drum 10 ar ranged in a tub 11.
- Drum 10 is rotatable about an axis of rotation 12 by means of a rotation drive (not shown) .
- Axis of rotation 12 is substantially horizontal.
- Laundry recipient 1 is suspended from a yoke 13, which rests on a base frame 14.
- the device comprises a cabinet 15, which is also mounted to frame 14.
- Cabinet 15 is substantially a cuboid having a width w, a height h, and a depth d (Fig. 2) .
- drum 10 On its front side, drum 10 comprises a front opening 16, which mates with a door (not shown) in the front side of cabinet 15.
- a heat exchanging device 2 is arranged at the back side of laundry recipient 1. It is advantageously mounted to laundry recipient 1, i.e. laundry recipient 1 bears the weight of heat exchanging device 2.
- Figs . 3 and 4 show views of heat exchanging device 2 and laundry container 1.
- a water duct 41 connects heat exchanging device 2 to drum 10.
- Heat exchanging device 2 comprises a conden ser 21 and an evaporator 22 of a heat pump 8.
- Heat pump 8 is schematically shown in Fig. 4. It comprises a compressor 80 that feeds a heat pump me dium to condenser 21, from where it passes an expansion valve 81 and enters evaporator 22. From evaporator 22, the fluid returns to compressor 80.
- a motor 82 is provided for operating pump 80.
- motor 82 and compressor 80 can be arranged in a foot section of the device.
- motor 82 and compressor 80 are vertically arranged.
- motor 82 can further be arranged horizontally beside the compressor 80. Such arrangement allows to exploit unused volume below heat exchanging de vice 2 and/or laundry recipient 1.
- Condenser 21 is arranged on top of evaporator
- Heat exchanging device 2 comprises at least a first rinsing duct 31. In addition, there may be further rinsing ducts 32.
- Each rinsing duct 31, 32 extends in a sub stantially horizontal direction.
- the rinsing ducts 31, 32 are arranged, as shown, under a small angle to the horizontal direction, with said angle being e.g. larger than 1° and/or smaller than 10° .
- the remaining further rinsing ducts 32 are arranged adjacent to condenser 21.
- a trough 4 is arranged adjacent to the lower end of the evaporator 22. It is configured to collect water from the heat exchanging device 2 and in particular from evaporator 22. The water might result from condensation in the evaporator 22 or from water that entered heat exchanging device 2 through the rinsing ducts 31, 32.
- a water duct 41 is connected to trough 4 and is configured to guide the collected water from trough 4 to laundry recipient 1, in particular to a bottom section of tub 11.
- water duct 41 can be connected to a drain pipe of the device.
- water duct 41 also serves to guide moisture-loaded air from the drum to evaporator 22.
- heat exchanging device 2 is arranged horizontally behind laun dry recipient 1 and drum 10.
- Condenser 21 and evaporator 22 both have ver tically arranged plates 201, 202 in order to increase the heat exchanging surface.
- condenser 21 comprises a smaller number of plates 201 than evaporator 22.
- Heat exchanging device 2 forms part of an air circulating system best explained in reference to Figs. 1 and 2.
- the air circulating system comprises, apart from heat exchanging device 2, at least the following components :
- Ventilator 20 is advantageously arranged at the bottom of the device, i.e. in the lowest 25% of the device. This allows to exploit room that is available there. Also, this design allows to mount ventilator 20 on the bottom parts of the device, in particular on frame 14, which allows to reduce the amount of vibration and noise transmitted to cabinet 15.
- ventilator 20 is a radial ventilator with a substantially vertical axis of rotation, which allows to better exploit the room availa ble at the bottom of the device.
- First air duct 24 has an input end 24a located at a top end of condenser 21. Further, it has an output end 24b located below evaporator 22 and connected to ventilator 20.
- Second air duct 25 is connected, at its input end 25a, to ventilator 20 at the bottom of the device.
- Its output end 25b is located at a level higher than the axis of rotation 12, in particular at a level higher than a maximum water level during washing the laundry. This prevents water from entering second air duct 25 from that end .
- rinsing ducts 31, 32 are ar ranged on heat exchanging device 2. They are best seen in Figs. 5 and 6, with Fig. 5 showing the ducts 31, 32 in partially cut-off view. As can be seen, each rinsing duct 31, 32 carries a plurality of nozzles 300 directed to wards evaporator 22 or condenser 21.
- the ducts 31, 32 are mounted directly to a housing 2a forming an air duct around evaporator 22 and condenser 21.
- the nozzles 300 are e.g. located at open ings in housing 2a.
- the nozzles 300 are elongate slits or other openings arranged in the wall of each rinsing duct 31, 32.
- the nozzles may also be formed by separate elements from the rinsing ducts 31, 32 and be connected thereto.
- Fig. 7 shows a schematic of a laundry dryer, in particular washer-drier. This may e.g. be the device of Figs. 1 - 6 or any other similar device.
- the device comprises heat exchang ing device 2 with condenser 21 and evaporator 22.
- Conden ser 21 and evaporator 22 each can comprise the plates 201, 202.
- Trough 4 is arranged underneath heat exchang ing device 2 to collect water therefrom.
- Heat exchanging device 2 is connected to ventilator 20.
- Ventilator 20 is configured to circulate air in the device.
- a control unit 9 is provided to control the components of the device. It is e.g. a microprocessor equipped with suitable software to carry out all operations of the methods described herein.
- control unit 9 controls ventilator 20 and therefore the transport of air through the air circulating system. It can also control the rotation of drum 10, the operation of heat pump 8, the feeding of water through the water ducts 31, 32, etc.
- control unit 9 activates heat pump 8 and ventilator 20. Further, drum 10 is rotated. Due to the operation of ventilator 20, mois ture-loaded air is drawn from laundry recipient 1 and fed from below into evaporator 22. In Fig. 7, this wet air is designated as a2.
- evaporator 22 In evaporator 22, the air is cooled and loses moisture. Condensed water accumulates on the plates 202 and/or other parts of evaporator 22 and drops down into trough 4.
- drum 10 the heated and dry air al coming from the condenser 21 absorbs the water of the wet laun dry, whereupon it is returned to evaporator 22.
- Control unit 9 can operate a drain pump to convey the water from the device.
- the lowest part of trough 4 is located at a higher level ml than the lowest part of tub 11, which is at a level m2. This design allows to convey water from trough 4 to tub 11 by means of gravity.
- the device does not contain a fluff filter separate from heat ex changing device 2. Hence, fluff will accumulate in heat exchanging device 2 and in particular in evaporator 22.
- control unit 9 can feed water to one or more of the rinsing ducts 31, 32. When doing so, the water will leave the rinsing ducts 31, 32 through the nozzles 300 and enter the evaporator 22 and/or condenser 21 for washing the same.
- This rinsing water will enter trough 4 and water duct 41, where it is guided to tub 11 and/or to the drain pipe .
- Such a rinsing process can e.g. take place when required, e.g. before, during, or after drying laun dry .
- the present device can be de signed to not only dry laundry but also to wash it. In that case, process water for washing the laundry has to be fed to laundry recipient 1.
- At least part of said process water is fed to laundry recipient 1 and therefore drum 11 through the rinsing pipes 31, 32.
- This allows to re-use the rinsing water for rinsing the evaporator 22 and/or condenser 21 as process water in the washing process, thereby reducing the total water consumption.
- control unit 9 is adapted to first feed a first batch of water from the rinsing pipe(s) 31, 32 through the condenser 21 and/or evaporator 22 and to discard this first batch from the machine without it coming into contact with the laun dry.
- control unit 9 can feed a second batch of water from the rinsing pipe(s) 31, 32 through the con denser 21 and/or evaporator 22 and to use this second batch for washing the laundry.
- This process is based on the understanding that the first batch of water will be heavily contaminated with lint. Hence, discarding it and not using it for washing reduces the amount of lint that comes into contact with the laundry.
- the user may select, de pending on the type of laundry and the desired quality of the washing, if the first batch of rinsing water is to be discarded or not.
- washing proceeds basically as in a conventional machine.
- the bottom end of evaporator 22 is at a level m3 that is higher than a maximum level 4 of the process water in drum 10 while washing the laundry.
- Control unit 9 is adapted to keep the water level in drum 10 during washing below said max imum level m4. This design prevents washing water from flooding evaporator 22 and/or condenser 21.
- Fig. 8 shows a schematic of another advanta ⁇ geous laundry dryer.
- this embodiment comprises a lint filter 5 arranged in the path of the air a2 between laundry recipient 1 and evaporator 22.
- water collected by trough 4 still flows through water duct 41 into tub 11.
- a siphon 6 is located in water duct 41.
- Control unit 9 is adapted to make sure that water is pre sent in siphon 6 while drying. This water blocks water duct 41 for air.
- control unit 9 activates ven tilator 20
- the wet air a2 from drum 10 passes through air duct 51 and filter 5 but not through water duct 41. Thus, it is filtered before entering heat exchanging device 2.
- the lowest part of lint filter 5 is advanta ⁇ geously arranged at a level m5 that is above maximum level m4 of the water in drum 10 and/or above the level m3 of the lower end of evaporator 22.
- the machine may comprise several rinsing ducts 31, 32, and control unit 9 can be adapted to individually and selectively feed water to said ducts.
- Control unit 9 is advantageously adapted to control the rinsing cycle in a sequence of first rinsing evaporator 22 and second rinsing condenser 21. This gives the condenser more time to cool before it is flushed with water, which avoids an excessive calcification of condenser 21.
- control unit 9 is adapted to only rinse the condenser 21 if it has a temperature below a threshold temperature Tp, in particular with TP ⁇ 50 0 C .
- the rinsing water can, as mentioned, be col lected by means of trough 4. It can be drained from trough 4 to drum 10 and be reused for the next washing cycle. Alternatively, part or all of it may be discarded and drained from the machine without using it for wash ing .
- control unit 9 can be adapted to rinse evaporator 22 and/or condenser 21 with water from the rinsing duct(s) 31 and/or 32 while turning on and off ventilator 20 in cycles. While ventilator 20 is running, air is pushed against the top-down-flow of the water into heat exchanging device 2 from below. This allows to keep at least part of the water in heat exchanging device 2, to be released once ventilator 20 is switched off. At that time, the trapped water will leave heat exchanging device 2 in a gush, which increases the cleaning efficiency of the process.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2018/061831 WO2019214805A1 (en) | 2018-05-08 | 2018-05-08 | Laundry dryer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3791016A1 true EP3791016A1 (en) | 2021-03-17 |
Family
ID=62143159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18723480.2A Pending EP3791016A1 (en) | 2018-05-08 | 2018-05-08 | Laundry dryer |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3791016A1 (en) |
WO (1) | WO2019214805A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009031812A2 (en) * | 2007-09-04 | 2009-03-12 | Lg Electronics Inc. | Dehumidifying apparatus for dryer |
EP2471998B1 (en) * | 2011-01-04 | 2019-04-10 | Electrolux Home Products Corporation N.V. | Appliance for drying laundry |
CN104593992A (en) * | 2013-10-30 | 2015-05-06 | 海尔集团公司 | Wave-wheel type heat pump washing and drying integrated machine and drying method |
KR20160049848A (en) * | 2014-10-28 | 2016-05-10 | 엘지전자 주식회사 | Laundry Treating Apparatus |
WO2017174766A1 (en) * | 2016-04-08 | 2017-10-12 | Arcelik Anonim Sirketi | A heat pump laundry washing and/or drying machine |
-
2018
- 2018-05-08 WO PCT/EP2018/061831 patent/WO2019214805A1/en unknown
- 2018-05-08 EP EP18723480.2A patent/EP3791016A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2019214805A1 (en) | 2019-11-14 |
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