EP0816548A2 - Washing machine of domestic type with open drying circuit and associated accessory equipment for converting the drying circuit into a closed circuit with condensation of the water vapour by air - Google Patents
Washing machine of domestic type with open drying circuit and associated accessory equipment for converting the drying circuit into a closed circuit with condensation of the water vapour by air Download PDFInfo
- Publication number
- EP0816548A2 EP0816548A2 EP97200675A EP97200675A EP0816548A2 EP 0816548 A2 EP0816548 A2 EP 0816548A2 EP 97200675 A EP97200675 A EP 97200675A EP 97200675 A EP97200675 A EP 97200675A EP 0816548 A2 EP0816548 A2 EP 0816548A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- washer dryer
- mouth
- heat exchanger
- casing
- 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
Images
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
- 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
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
Definitions
- the present invention relates to a washing machine of domestic type incorporating an open drying circuit and accessory equipment for converting the drying circuit into a closed circuit, with condensation of the water vapour by air.
- washing machines of domestic type known as washer dryers which not only wash the laundry but also dry it with a flow of heated air drawn in in a closed drying circuit which includes, in order, a washing tub and drum assembly, an air/water heat exchanger, a suction unit, and a heating unit consisting of electrical resistors.
- the flow of air produced by the suction unit is heated by the electrical resistors and conveyed into the washing drum, where, as it passes through the wet laundry, evaporates the absorbed water.
- the moist air is cooled down by a stream of cold water taken from the water main and discharged into the sump. This cooling causes the water vapour to condense and it is then collected in the washing tub and discharged together with the cooling water.
- the dried air is then drawn in by the suction unit and recycled.
- dryers having the sole function of drying the laundry, which use the same concept of drying by means Of a flow of hot air in a closed cycle: such machines have an air/air heat exchanger which, in order to cool the moist air and condense the water vapour, use air from the environment, which a suction unit circulates through the heat exchanger, in place of mains water.
- the present invention solves the disadvantages of both categories of washer dryer and dryer mentioned above by providing a versatile washer dryer that is economical and simple to manufacture, and equipped in its basic version with only an open-type drying circuit that can be converted, if circumstances so require, to a closed circuit, by using accessory equipment, the cost of which does not necessarily impact on the basic washer dryer model but only if the accessory equipment is indispensable.
- the accessory equipment can easily be installed as an option on the basic model, either in the final stage of production as a special version of the product or as an option brought in later by the user.
- the accessory equipment which is also the subject of the present invention, may comprise in its simplest form a filter for trapping fluff and lint and an air/air heat exchanger water vapour condenser.
- the accessory equipment may also comprise an auxiliary fan unit for drawing a secondary flow of cooling and condensing air through the heat exchanger.
- the accessory equipment acts only as a filter at the outlet of the drying circuit.
- a washer dryer according to the present invention comprises a structure 1 of standardized dimensions, for example, width 60 cm, depth 50 cm, height 80 cm, in which is housed, on sprung mountings, a washing tub 2 containing a rotating drum 3, drive members (not shown), a discharge filter/pump unit 4 whose inlet is connected to the bottom of the tub 2 by a flexible tube 5, while its outlet is connected to a discharge pipe 6.
- the drum 3 is generally loaded with washing through a front door 7.
- the structure of the machine includes a fan unit 8 which, unlike ordinary washer dryers, sucks in air from the environment through a suction mouth 9 that opens on the rear wall of the machine and is connected to the fan unit 8 by a flexible hose 10.
- the fan unit 8 conveys the in-drawn air into a heating chamber 11, in itself conventional, where the in-drawn air is heated by means of electrical resistors 12.
- the hot air is conveyed through a pipe 13 and the loading mouth of the washing drum 3, into the drum itself.
- the hot air passes through the washing drum before leaving the washing tub through an outflow mouth 14 connected to the washing tub by a flexible tube 15 and open to the external environment through the rear wall of the machine.
- the outflow mouth 14 is of course open at a higher level than the maximum level to which the tub 2 can be filled with washing water, this level being indicated by the numeral 16.
- the delivery pipe 13 and the outflow mouth are conveniently arranged in diametrically opposite positions with respect to the washing tub, for a more efficient sweeping of the washing drum and of the laundry contained inside it and hence for a more efficient drying action.
- the fan unit 8 and the heating chamber 11 are mounted directly on the tub 2.
- they can also be attached to any suitable frame integral with the machine structure 1, in which case the flexible hose 10 can be replaced by a rigid pipe.
- the machine shown in Figs 1 and 2 is advantageously fitted with a pipe 117 for collecting the condensed water: it opens through the rear wall of the machine at a higher level than the maximum filling level and is connected to the discharge filter/pump unit 4.
- the machine's programme selector is of course also designed to execute a drying cycle in the course of which the drum 3 is rotated at a predetermined speed, and the fan 8 and heating elements 12 are on.
- the machine is made able to operate also as a dryer.
- the hot moist air emitted through the mouth 14 disperses freely into the atmosphere.
- the outflow mouth 14 may conveniently be provided with an elbow joint 50 that can be orientated in different directions and is connected to a rigid or flexible tube 51 in order to convey the hot air up to the top level of the machine or to one side, in order to make it easier to connect the outflow mouth 14 to ventilation apertures without the need to move the machine out when installed against a wall, as is normally the case.
- an elbow joint 50 that can be orientated in different directions and is connected to a rigid or flexible tube 51 in order to convey the hot air up to the top level of the machine or to one side, in order to make it easier to connect the outflow mouth 14 to ventilation apertures without the need to move the machine out when installed against a wall, as is normally the case.
- the moist air can be removed by using the extraction hood without having to make a direct connection to the ventilation stack.
- This valve which during washing operations is not subject to any pressure difference, may consist of a butterfly valve whose normal position is closed and which is opened by the pressure difference produced when the fan 8 is turned on.
- valve may be controlled by a thermomechanical actuator of known type which is often used in this field or by any other functionally equivalent means.
- a machine of the type described can, either towards the end of the manufacturing process or in the user's home, be fitted with different levels of optional equipment to increase its performance and range of possible uses.
- FIGS 3 and 4 show, in a partially sectioned rear view and in a front-to-rear transverse section, respectively, a portion of the washer dryer.
- a housing is formed for a diffusion chamber 19 connected at the bottom to and communicating with the outflow mouth 14 via a tube 20, or alternatively directly.
- the diffusion chamber 20 is closed at the top by a removable grille 21 that functions as a frame for a gauze filter 22.
- the grille 21 has relief ribs 23 in the upper plane of the machine to ensure that there are always communication slits between the inside and outside of the chamber, even if objects are placed on the grille which could obstruct the apertures of the grille.
- the machine can easily be converted into a washer dryer with a closed drying circuit by attaching to the back of the machine an accessory unit comprising a fan, an air/air heat exchanger and a fluff filter.
- the accessory consists of a flat casing 24 having depth D of the order of 7 - 15 cm, width W approximately equal to the width of the washer dryer (60 cm is a standardized dimension) and extending in height above the maximum level to which the machine can be filled with liquid, up to approximately the top surface of the machine.
- a cassette filter 26 Removably housed in the casing, which is closed at the top by a removable cover 25, and with suitable internal ribs and membranes to hold them in position, are a cassette filter 26, a heat exchanger 27 and a fan unit 28.
- the bottom of the casing 24 forms a condensation collecting chamber 29.
- the wall of the casing 24 placed against the rear wall of the washer dryer 30 includes an aperture 31 connected (by a pipe fitting, elastic flange and the like) to the outflow mouth carrying the hot moist air from the machine.
- the hot air enters a chamber formed between the filter 26 and the wall of the casing unit placed against the rear wall of the machine, passes through the filter 26 and is conveyed, its path defined by a membrane 32, to the condensation collecting chamber 29.
- the manifold 33 contains an outflow aperture 34 opposite the suction mouth of the machine's drying circuit.
- the wall of the casing 24 placed against the rear wall of the machine has of course a corresponding aperture.
- the broken line with arrows 35 represents the path of the air through the casing, from the inlet mouth 31 to the outlet mouth 34.
- the hot moist air is cooled down to produce condensation which drips into the collecting chamber 29, from where it is extracted by a discharge mouth 36 connected to the condensation collecting pipe 117 (Fig. 1) of the washer dryer and conveyed into the washing tub (where it can advantageously be kept for a later washing operation, hereby helping to reduce the amount of water consumed for the washing operation and reducing its hardness) or be directly expelled by the action of the discharge pump 4 (Fig. 1).
- the fan unit 28 has an inlet mouth connected to a suction pipe 37, the top of which is open and communicates with the environment through a grille 38 in the removable cover 25.
- the solid line with arrows 40 represents the path of the cooling air through the casing 24.
- the filter 26, having an upper cap 41 with handle 42, can be lifted up out of its housing to allow periodic easy cleaning.
- heat exchanger 27 integral with the manifold 33 and having a handle 43, can be lifted up out of its housing for periodical inspection and cleaning, if necessary.
- the casing can easily be fitted securely to the rear wall of the washer dryer as an optional accessory using screws, hanging hooks or equivalent means.
- the fan unit 28 can be connected up electrically by a plug connector into a power socket on the rear wall of the machine, or even by a terminal board accessible from the back of the machine.
- the fan 28 can be turned on at the same time as the fan 8.
- the pump may be used at the end or for short intervals in the course of the drying cycle even if the accessory unit is not present.
- the fan unit 8 of the washer dryer shown in Figs 1 and 2 in this case preferably mounted on the structure/frame of the machine and not on the washing tub, can be provided with a second rotor having a suction mouth and delivery mouth that open through the rear wall of the machine.
- the accessory unit formed by the casing 24 shown in Fig. 5 will not require its own fan and can be fitted with a suction pipe (such as 37) which is connected to the suction mouth of the second rotor as well as with a delivery pipe which connects with the delivery mouth of the second rotor to convey the cooling air through the heat exchanger.
- a suction pipe such as 37
- the accessory unit comprises only static components (filter and heat exchanger) and does not need to be connected electrically to the washer dryer.
- a removable cap may be fitted over the suction mouth of the second rotor, or even, conveniently, a connecting tube running between the outlet mouth of the second rotor and the suction mouth of the first rotor so as to use the two rotors in series and thus achieve a higher throughput of air.
- accessory equipment is preferably installed on the rear wall of the washer dryer (primarily so that it can be slotted into a space in a modular kitchen and so that the top panel of the machine can be used as a work surface), it is also possible to manufacture accessory equipment, for converting the machine drying circuit from open to closed, that fits over the top of the volume of the machine and is firmly attached to the top panel.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
- Figure 1 shows schematically, in a composite section from front to rear on several planes, a preferred embodiment of a domestic washer dryer in accordance with the present invention,
- Figure 2 is a top view of the machine of Figure 1, with the top closing panel removed,
- Figure 3 is a rear view of the machine of Figures 1 and 2 equipped with an accessory device for filtering the expelled air, in a sectional view,
- Figure 4 is a front to rear section through the filtration device of Figure 3, and
- Figure 5 is a "transparent" perspective view of a preferred embodiment of the accessory equipment, combined with the machine of Figures 1 and 2 in order to convert the open drying circuit into a closed circuit.
Claims (13)
- Laundry washer dryer of domestic type of the type in which air heated by heating elements is drawn through a washing/drying drum (3) housed in a washing tub (2) by a suction unit (8) with a first rotor, to evaporate the liquid absorbed by laundry present in said washing drum (3), the washer dryer being characterized in that it comprises:a suction mouth (9) open to the external environment of said washer dryer and connected to the inlet of said suction unit (8) andan outflow mouth (14) connected to said washing tub (2) and open to the external environment at a higher level than a predetermined maximum level to which said tub (2) can be filled with washing liquid.
- Washer dryer according to Claim 1 in which said suction (9) and outflow (14) mouths open through a rear wall of said washer dryer.
- Washer dryer according to Claim 1 or 2 comprising means (17, 18) for blocking the flow of air through at least one of said suction and outflow mouths, these being normally closed but opened for a drying condition of said washer dryer.
- Washer dryer according to Claim 3 in which said blocking means consist of at least one normally closed butterfly valve which is opened by a pressure difference upstream and downstream of said valve produced by said suction unit.
- Washer dryer according to Claim 1, 2, 3, 4 or 5 in which said outflow mouth (14) comprises an elbow joint (50) that can be orientated in different directions.
- Washer dryer according to previous claims, comprising a flexible outflow hose (51) connected to said outflow mouth (14), on the outside of said washer dryer.
- Washer dryer according to previous claims, comprising a casing (24) connected to the outlet of said outflow mouth (14) and housing a filter (22, 26).
- Washer dryer according to one of Claims 1 to 6, comprising a casing (24) removably attached to said washer dryer and housing a removable filter (26), an air/air heat exchanger (27) and a fan unit (28), said casing (24) forming a first recycling channel from said outflow mouth (14) to said suction mouth (9), through said filter (26) and said heat exchanger (27), a condensation collecting chamber (29) in said first channel and a second channel for cooling air sucked in from the environment by means of said fan unit (28) and conveyed through said heat exchanger (27).
- Washer dryer according to one of Claims 1 to 6 in which said suction unit (8) comprises a second rotor with suction mouth and delivery mouth that are both open to the exterior of said washer dryer.
- Washer dryer according to Claim 9, comprising a casing (24) removably attached to said washer dryer and housing a removable filter (26) and an air/air heat exchanger (27), said casing forming a first recycling channel from said outflow mouth (14) to said suction mouth (9), through said filter (26) and said heat exchanger (27), a condensation collecting chamber (29) in said first recycling channel and a second channel for cooling air sucked in from the environment by means of said second rotor and conveyed through said heat exchanger.
- Washer dryer according to Claim 8 or 10 in which said casing (24) is attached to the rear wall of said washer dryer.
- Accessory equipment for washer dryer according to previous claims, comprising a casing (24) housing a removable filter (26) and also housing an air/air heat exchanger (27), said casing (24) forming a first channel for a first flow of air from an inlet mouth (31) and an outlet mouth (34), through said filter (26) and said heat exchanger (27), a condensation collecting chamber (29) and a second channel for a second flow of air through said heat exchanger (27).
- Accessory equipment for washer dryer as claimed in Claim 11, comprising a fan (28) housed in said casing (24), in series with said heat exchanger (27), in order to activate said second flow of air.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI961294 | 1996-06-26 | ||
IT96MI001294A IT1284442B1 (en) | 1996-06-26 | 1996-06-26 | DOMESTIC WASHING MACHINE WITH OPEN DRYING CIRCUIT AND RELATED ACCESSORY EQUIPMENT FOR CONVERSION OF THE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0816548A2 true EP0816548A2 (en) | 1998-01-07 |
EP0816548A3 EP0816548A3 (en) | 2003-01-02 |
EP0816548B1 EP0816548B1 (en) | 2004-08-18 |
Family
ID=11374482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97200675A Expired - Lifetime EP0816548B1 (en) | 1996-06-26 | 1997-03-06 | Accessory equipment for converting the drying circuit of a washing machine of domestic type with open drying circuit into a closed circuit with condensation of the water vapour by air |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0816548B1 (en) |
DE (1) | DE69730274T2 (en) |
IT (1) | IT1284442B1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1411163A3 (en) * | 2002-10-16 | 2005-11-30 | Matsushita Electric Industrial Co., Ltd. | Washing and drying machine |
EP1650338A2 (en) * | 2004-10-22 | 2006-04-26 | LG Electronics, Inc. | Washing machine combined with dryer |
EP1655405A2 (en) * | 2004-11-08 | 2006-05-10 | LG Electronics Inc. | Drum type washing machine |
US20110277336A1 (en) * | 2010-05-13 | 2011-11-17 | Samsung Electronics Co., Ltd | Clothes dryer |
EP2573253A1 (en) * | 2011-09-26 | 2013-03-27 | Electrolux Home Products Corporation N.V. | Heat pump dryer |
KR101305287B1 (en) * | 2006-10-02 | 2013-09-06 | 엘지전자 주식회사 | Washing machine with odor removal function |
US20150337475A1 (en) * | 2009-08-21 | 2015-11-26 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
WO2017114631A1 (en) * | 2015-12-29 | 2017-07-06 | Arcelik Anonim Sirketi | A washer dryer comprising a heating means and the control method thereof |
DE102017123318A1 (en) | 2017-10-09 | 2019-04-11 | Miele & Cie. Kg | Heat pump unit, preferably heat pump laundry dryer or heat pump washer dryer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109487509B (en) * | 2017-09-13 | 2021-07-16 | 青岛海尔洗涤电器有限公司 | Clothes treatment equipment |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3937043A (en) * | 1974-02-25 | 1976-02-10 | White-Westinghouse Corporation | Vapor saving ambient air intake system for a dry cleaner |
GB1461073A (en) * | 1973-06-01 | 1977-01-13 | Colston Appliances Ltd | Washing machine having a hot air dryer |
GB1517708A (en) * | 1974-12-18 | 1978-07-12 | Smeg Elettrodomestici | Combined washing and drying machine |
GB2075559A (en) * | 1980-05-03 | 1981-11-18 | Miele & Cie | Washing machine |
US4516331A (en) * | 1981-09-16 | 1985-05-14 | Tokyo Shibaura Denki Kabushiki Kaisha | Drying apparatus having recycle air path |
GB2258720A (en) * | 1991-08-15 | 1993-02-17 | Creda Ltd | Tumble dryer |
US5279047A (en) * | 1989-02-03 | 1994-01-18 | Zanker Gmbh | Laundry dryer |
-
1996
- 1996-06-26 IT IT96MI001294A patent/IT1284442B1/en active IP Right Grant
-
1997
- 1997-03-06 EP EP97200675A patent/EP0816548B1/en not_active Expired - Lifetime
- 1997-03-06 DE DE69730274T patent/DE69730274T2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1461073A (en) * | 1973-06-01 | 1977-01-13 | Colston Appliances Ltd | Washing machine having a hot air dryer |
US3937043A (en) * | 1974-02-25 | 1976-02-10 | White-Westinghouse Corporation | Vapor saving ambient air intake system for a dry cleaner |
GB1517708A (en) * | 1974-12-18 | 1978-07-12 | Smeg Elettrodomestici | Combined washing and drying machine |
GB2075559A (en) * | 1980-05-03 | 1981-11-18 | Miele & Cie | Washing machine |
US4516331A (en) * | 1981-09-16 | 1985-05-14 | Tokyo Shibaura Denki Kabushiki Kaisha | Drying apparatus having recycle air path |
US5279047A (en) * | 1989-02-03 | 1994-01-18 | Zanker Gmbh | Laundry dryer |
GB2258720A (en) * | 1991-08-15 | 1993-02-17 | Creda Ltd | Tumble dryer |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7263861B2 (en) | 2002-10-16 | 2007-09-04 | Matsushita Electric Industrial Co., Ltd. | Washing and drying machine |
KR100772773B1 (en) * | 2002-10-16 | 2007-11-01 | 마츠시타 덴끼 산교 가부시키가이샤 | Washing and drying machine |
EP1411163A3 (en) * | 2002-10-16 | 2005-11-30 | Matsushita Electric Industrial Co., Ltd. | Washing and drying machine |
EP1650338A2 (en) * | 2004-10-22 | 2006-04-26 | LG Electronics, Inc. | Washing machine combined with dryer |
EP1650338A3 (en) * | 2004-10-22 | 2006-07-05 | LG Electronics, Inc. | Washing machine combined with dryer |
AU2005203445B2 (en) * | 2004-10-22 | 2008-01-31 | Lg Electronics Inc. | Washing machine combined with dryer |
EP1655405A2 (en) * | 2004-11-08 | 2006-05-10 | LG Electronics Inc. | Drum type washing machine |
EP1655405A3 (en) * | 2004-11-08 | 2006-12-06 | LG Electronics Inc. | Drum type washing machine |
AU2005203220B2 (en) * | 2004-11-08 | 2008-03-13 | Lg Electronics Inc. | Drum type washing machine |
KR101305287B1 (en) * | 2006-10-02 | 2013-09-06 | 엘지전자 주식회사 | Washing machine with odor removal function |
US9689100B2 (en) * | 2009-08-21 | 2017-06-27 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US20150337475A1 (en) * | 2009-08-21 | 2015-11-26 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US9945062B2 (en) | 2009-08-21 | 2018-04-17 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US10633776B2 (en) | 2009-08-21 | 2020-04-28 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US11208755B2 (en) | 2009-08-21 | 2021-12-28 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US11913160B2 (en) | 2009-08-21 | 2024-02-27 | Whirlpool Corporation | Controlled moisture removal in a laundry treating appliance |
US8615895B2 (en) * | 2010-05-13 | 2013-12-31 | Samsung Electronics Co., Ltd. | Clothes dryer |
US20110277336A1 (en) * | 2010-05-13 | 2011-11-17 | Samsung Electronics Co., Ltd | Clothes dryer |
WO2013045316A1 (en) * | 2011-09-26 | 2013-04-04 | Electrolux Home Products Corporation N.V. | Heat pump dryer |
EP2573253A1 (en) * | 2011-09-26 | 2013-03-27 | Electrolux Home Products Corporation N.V. | Heat pump dryer |
WO2017114631A1 (en) * | 2015-12-29 | 2017-07-06 | Arcelik Anonim Sirketi | A washer dryer comprising a heating means and the control method thereof |
DE102017123318A1 (en) | 2017-10-09 | 2019-04-11 | Miele & Cie. Kg | Heat pump unit, preferably heat pump laundry dryer or heat pump washer dryer |
Also Published As
Publication number | Publication date |
---|---|
DE69730274D1 (en) | 2004-09-23 |
EP0816548B1 (en) | 2004-08-18 |
ITMI961294A1 (en) | 1997-12-26 |
ITMI961294A0 (en) | 1996-06-26 |
EP0816548A3 (en) | 2003-01-02 |
IT1284442B1 (en) | 1998-05-21 |
DE69730274T2 (en) | 2005-09-08 |
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