EP2634301B1 - Machine à laver et sécher le linge domestique avec un dispositif de condensation et prodédé de fonctionnement de cette machine - Google Patents
Machine à laver et sécher le linge domestique avec un dispositif de condensation et prodédé de fonctionnement de cette machine Download PDFInfo
- Publication number
- EP2634301B1 EP2634301B1 EP12157424.8A EP12157424A EP2634301B1 EP 2634301 B1 EP2634301 B1 EP 2634301B1 EP 12157424 A EP12157424 A EP 12157424A EP 2634301 B1 EP2634301 B1 EP 2634301B1
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- European Patent Office
- Prior art keywords
- air
- tub
- machine
- fan
- air stream
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- 238000001035 drying Methods 0.000 title claims description 76
- 238000010412 laundry washing Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 30
- 238000004140 cleaning Methods 0.000 claims description 57
- 238000005406 washing Methods 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 10
- 239000004744 fabric Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000008237 rinsing water Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid 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
- D06F2105/32—Air flow control means
-
- 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
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
-
- 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
Definitions
- the present invention concerns the technical field of laundry washing and drying machines.
- the present invention refers to laundry drying machines of the condenser type.
- the present invention relates to a household laundry washing and drying machine.
- today's front-loading laundry washing and drying machines generally comprise: a substantially parallelepiped-shaped outer boxlike casing, typically structured for resting on the floor; a substantially bell-shaped washing tub which is generally suspended in floating manner inside the casing via a number of coil springs and shock-absorbers, with the front opening/mouth directly facing a laundry loading/unloading pass-through opening provided in the front wall of the casing; a substantially cylindrical elastically-deformable bellows which connects in watertight manner the front mouth/opening of the bell-shaped washing tub to the laundry loading/unloading opening on front wall of the casing; and a porthole door which is hinged to the front wall of the casing to rotate to and from a closing position in which the door rests on the front face of the casing to close the laundry loading/unloading on the front wall and substantially watertight seal the washing tub.
- the front-loading laundry washing and drying machines of the above type furthermore comprise: a substantially bell-shaped, cylindrical revolving drum which is structured for housing the laundry to be washed and/or dried, and is housed in axially rotating manner inside the washing tub for rotating about its longitudinal reference axis; an electric motor assembly which is located outside of the washing tub, and is structured for driving into rotation the revolving drum about its longitudinal reference axis inside the washing tub; and a, preferably closed-circuit, air duct assembly which is structured to circulate inside the washing tub a stream of hot air having a low moisture content, and which flows through the revolving drum and over the laundry inside the drum to dry the laundry.
- the air duct assembly is structured for gradually drawing air from the washing tub; cooling down the air arriving from the washing tub so to extract and retain the surplus moisture in the air; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air arriving from the washing tub; and feeding the heated, dehumidified, air back into the washing tub, where it flows over the laundry stored inside the revolving drum to dry the laundry.
- the cooling down and dehumidification of the air drawn from the washing tub is performed inside a condensing duct, also called condenser, which is attached/integrated to/on the back of the washing tub, preferably inside the boxlike casing.
- the condensing duct is preferably provided with a water supply water device mounted thereon for supplying cooling water to condense, and remove moisture from air drawn from the washing tub.
- the heating up of the dehumidified air coming out of the condenser is performed inside an air heating device which is rigidly attached to the top of the washing tub so as to have a first end in direct communication with the condenser and a second end in direct communication with the washing tub close to the front mouth of the latter, and which internally houses a centrifugal fan that circulates the air across the washing tub and the resistor that heats up the dehumidified air directed back into the washing tub.
- the centrifugal fan typically comprises a fixed speed electric fan.
- US5226203A discloses a laundry washing and drying machine wherein a cleaning process is performed.
- the cleaning process takes place during one or more phases of the washing cycle by activating the same fan which is used to circulate the air across the washing tub in the drying phase.
- Activation of the fan causes drawing of water from the tub during said one or more phases of the washing cycle.
- Drawing of water is carried out by means of the suction effect of the fan.
- the sucked water reaches a predetermined level within the condenser which causes the cleaning of lint deposited on the inner walls of the condenser itself.
- the dirty water flows back inside the tub and from there discharged externally during a subsequent discharge phase of the washing cycle.
- the cleaning process of the condenser above described belonging to the known art poses some drawbacks.
- a first drawback posed by this known process is constituted by the fact that the cleaning process may not be successful if a high quantity of lint is deposited on the inner walls of the condenser.
- a further drawback posed by this known technique is that the cleaning process may require a long time to be preformed, with a consequent increase of the energy dissipation.
- EP2280115 discloses a clothes washing device with a drying procedure and a method of controlling the same.
- the clothes washing device includes a water tub, a drum rotatably disposed in the water tub to receive clothes of a user, a heating member for heating air to perform drying operation on the clothes, and a blower for driving air circulation.
- the clothes washing device is provided with a washing procedure for performing washing operation on the clothes placed in the drum by the user, and further provided with a cleaning procedure for performing cleaning operation by intermittently driving the blower. Through the cleaning procedure, the lint generated during the washing procedure and drying procedure can be washed away, thus ensuring a washing effect and drying effect of the device.
- DE4303655 discloses a programme-controlled washer dryer with a drum, mounted rotatably in a tub, for receiving laundry, with a flow channel arranged between an air-inlet orifice and an air-outlet orifice of the tub and having a blower, with a heating channel and with a condensation channel, the condensation channel possessing, in its wall region, a cooling channel fed in a first programme step via a cooling-water connection and a rinsing-water channel fed in a second programme step via a rinsing-water connection. This takes places in that the rinsing-water channel is guided into the blower region of the condensation channel.
- DE102006061211 discloses a method for removing, during a drying process of a domestic appliance for the care of items of laundry, lint generated from a heat exchanger, in which, for cleaning, a rinsing liquid is passed through the heat exchanger, wherein the rinsing liquid during a cleaning phase, depending on the strength of an air flow is deflected by the deflection and passes through various depending portions of the heat exchanger.
- DE19952751 discloses a machine having a drying air fan, a filter for pieces of fabric in a drying air channel, a device for blowing out pieces of fabric from the filter and a device for removing pieces of fabric that have been blown out.
- the machine has devices for reducing or closing the cross-section of the drying air channel and for producing an air steam for blowing out pieces of fabric when the drying air fan is switched on.
- the aim of the present invention is therefore to solve the noted drawbacks and thus providing a washing and drying machine having an improved condenser cleaning system.
- the applicant has found that by providing a laundry washing and drying machine provided with an air circulating device which generates a first air stream for circulating hot air through a tub for drying the laundry, and which generates a second air stream, different (i.e. having a different volumetric flow rate) from the first air stream, for sucking liquid from the tub and cleaning with this liquid a condensing device adapted for dehumidifying moist air coming from the tub, it is possible to enhance the cleaning of the condensing device.
- the present invention relates, therefore, to a laundry washing and drying machine comprising:
- the intensity of the second air stream i.e. the volumetric flow rate of the second air stream
- the intensity of the first air stream is higher than the intensity of the first air stream
- the air circulating device comprises a fan and a speed regulator device for the fan in order to generate the first or the second stream.
- the air circulating device comprises a first fan to generate the first air stream and a second fan to generate the second air stream.
- the first fan is similar (i.e. similar in shape, so as to be able to generate substantially a same air flow) to the second fan and the working rotational speed of the second fan is higher than the working rotational speed of the first fan.
- the power of the second fan is higher than the power of the first fan.
- the air circulating device comprises a speed regulator device for the first fan and/or a speed regulator device for the second fan.
- the fan comprises an electric centrifugal fan.
- the speed regulator device comprises an inverter.
- the condensing device comprises a duct and a water supply device for cooling down and dehumidifying moist air flowing through the duct.
- the machine comprises a liquid detecting device suitable for detecting the presence of liquid inside the tub.
- the second air stream is generated when presence of liquid in the tub is detected by the liquid detecting device.
- the machine comprises a control unit suitable for the controlling the intensity of the first and/or the intensity of the second air stream.
- the machine comprises an interface unit accessible to a user.
- the invention relates to a method for operating a washing and drying machine, wherein the washing and drying machine comprises:
- the method comprises using a first air stream for circulating hot air through the tub when drying the laundry, and using a second air stream, different from the first air stream, for suction of liquid from the outlet hole when cleaning the condensing device.
- reference number 1 indicates as a whole a laundry washing and drying machine 1 according to the present invention.
- the laundry washing and drying machine 1 preferably comprises, though not necessarily, a substantially parallelepiped-shaped outer boxlike casing 2 which is preferably structured for resting on the floor and a preferably, though not necessarily, substantially cylindrical, bell-shaped, hollow tub 3 which is suspended in floating manner inside the casing 2.
- the tub 3 preferably has its front opening or mouth directly facing a laundry loading/unloading pass-through opening provided in the front wall 2a of the boxlike casing 2.
- a substantially cylindrical, bell-shaped revolving drum 9 which is structured for housing the laundry 10 to be washed and/or dried, is housed in axially rotating manner inside the tub 3 so as to be able to freely rotate about its longitudinal reference axis L.
- tub 3 is advantageously suspended in floating manner inside casing 2, preferably via a suspension system preferably comprising a number of coil springs (not shown) and vibration dampers (not shown).
- the front opening/mouth of tub 3 is preferably connected in watertight manner to the laundry loading/unloading opening on front wall 2a via a substantially cylindrical, elastically-deformable bellows 17.
- the revolving drum 9 is preferably arranged inside tub 3 so that the drum front opening is directly faced/aligned to the laundry loading/unloading opening on front wall 2a, and so that the rotation axis of the drum 9 is preferably locally substantially coincident with the substantially horizontally-oriented, longitudinal reference axis L of tub 3.
- a porthole door 4 is hinged to the front wall 2a of casing 2 to rotate about a preferably, though not necessarily, vertically-oriented reference axis to and from a closing position in which the peripheral border of the porthole door 4 rests completely on front wall 2a for closing the laundry loading/unloading opening and watertight sealing the tub 3.
- the front-loading laundry washing and drying machine 1 preferably furthermore comprises an electric motor assembly 11 which is structured for driving into rotation the revolving drum 9 about its longitudinal reference axis L inside the tub 3, advantageously by means of a belt/pulley system.
- the machine 1 preferably comprises a water and detergent supplying assembly (not shown) which is structured for selectively feeding into the tub 3, according to the selected washing cycle, a given amount of detergent, softener and/or other washing agent suitably mixed with the fresh water arriving from the water mains, or simply a given amount of fresh water arriving from the water mains.
- a water and detergent supplying assembly (not shown) which is structured for selectively feeding into the tub 3, according to the selected washing cycle, a given amount of detergent, softener and/or other washing agent suitably mixed with the fresh water arriving from the water mains, or simply a given amount of fresh water arriving from the water mains.
- the laundry washing machine 1 advantageously comprises a water outlet circuit 25.
- the water outlet circuit 25 preferably comprises a drain pump 26, a first pipe 27 connecting the tub 3 to the drain pump 26 and an outlet pipe 28 ending outside the casing 2.
- the water outlet circuit 25 is suited to drain the liquid, i.e. water or dirty water or water mixed with washing and/or rinsing products, from the tub 3 to the outside.
- the water outlet circuit 25 may be advantageously provided with a recirculation circuit, not illustrated, adapted to drain liquid from a bottom region of the tub 3 and to re-admit such a liquid into another region of the tub 3.
- the laundry washing machine 1 comprises a device, not shown, suited to sense (or detect) the liquid level inside the tub 3.
- the device preferably comprises a pressure sensor which senses the pressure in the tub 3.
- the water heating element 20 preferably comprises an electric resistor suited to come into contact with the liquid present on the bottom of the tub 3 to heat said liquid.
- the laundry washing machine 1 is provided with an air treating system 5 which is structured to circulate inside the tub 3 a stream of hot air H1 having a low moisture content, and which flows through the revolving drum 9 and over the laundry 10 located inside the drum 9 to dry the laundry 10.
- an air treating system 5 which is structured to circulate inside the tub 3 a stream of hot air H1 having a low moisture content, and which flows through the revolving drum 9 and over the laundry 10 located inside the drum 9 to dry the laundry 10.
- the air treating system 5 is preferably structured for gradually drawing air from tub 3, cooling down the stream of moisture-laden air H2 arriving from the tub 3. so as to extract and retain the surplus moisture in the moist air, and heating the dehumidified air to a predetermined temperature, preferably higher than that of the moist air arriving from tub 3. Finally the heated, dehumidified air H1 is conveyed again into the tub 3, where it flows over the laundry 10 stored inside the revolving drum 9 to dry the laundry 10, as said above.
- the air treating system 5 is advantageously housed inside the boxlike casing 2 and preferably comprises an air cooling device 6, an air heating device 7 arranged downstream of the air cooling device 6 and an air circulating device 14.
- the air cooling device 6 is preferably attached to the back of tub 3 and is fluidly connected to the tub 3, preferably at an outlet hole 3b provided on the bottom of the tub 3 itself.
- the air cooling device 6 is structured to cool down the air H2 arriving from tub 3 so as to extract the surplus moisture in the air drawn from tub 3.
- the air heating device 7 is fluidly connected to both the tub 3 and the air cooling device 6, so as to allow the dehumidified air to flow from the air cooling device 6 to the tub 3, and it is structured to heat up the dehumidified air arriving from the air cooling device 6 before this air returns back into tub 3 through an inlet hole 3a.
- the air cooling device 6 preferably comprises a cold-water condenser 16 which is preferably, but not necessarily, arranged on the back of tub 3, and which preferably uses a rain/shower of cold water arriving advantageously from a water mains 30 to cool down and dehumidify the moist air H2 that arrives from tub 3 and flows upwards in the air cooling device 6 up to the top of the later.
- the moist air H2 advantageously flows upwards through a condensing duct 38.
- the air heating device 7 is preferably rigidly attached to the top of tub 3.
- the air heating device 7 comprises a tubular body 12 and a heating element 13.
- the tubular body 12 is preferably structured for being firmly fixed to the tub 3, preferably on the top of the latter, and preferably comprises a first opening or mouth 12a fluidly connected to, i.e. in direct communication with, the air cooling device 6, and a second opening or mouth 12b fluidly connected to, i.e. in direct communication with, the inside of the 17 bellows, or fluidly connected directly to the inside of tub 3, preferably close to the front opening of tub 3 in correspondence of its inlet hole 3a.
- the heating element 13 preferably comprises a resistor (only schematically illustrated in Figure 2 ) or other equivalent heating element, which is housed inside the tubular body 12, and is structured to heat up, when electrically powered, the air that flows through the tubular body 12.
- the air circulating device 14 preferably comprises an electric centrifugal fan 40, or other equivalent air circulating device, which is preferably housed inside the tubular body 12, preferably upstream of resistor 13, and is structured to circulate through the tubular body 12 an airflow that subsequently flows across the tub 3 and the air cooling device 6 for finally returning back to tubular body 12.
- an electric centrifugal fan 40 or other equivalent air circulating device, which is preferably housed inside the tubular body 12, preferably upstream of resistor 13, and is structured to circulate through the tubular body 12 an airflow that subsequently flows across the tub 3 and the air cooling device 6 for finally returning back to tubular body 12.
- the centrifugal fan 40 is preferably recessed on a portion of the tubular body 12 suitably shaped to form the outer volute or impeller housing of centrifugal fan 40.
- the air heating device 7 furthermore comprises one or more temperature sensors 37 which are located inside, or faced to the inside of, tubular body 12 and are structured for measuring the temperature of the air H1 flowing inside tubular body 12, preferably close to the second opening or mouth 12b of the tubular body 12.
- the air treating system 5 therefore, allows the laundry 10 to be dried when the laundry washing and drying machine is performing a drying cycle, usually after a washing cycle.
- a condenser cleaning cycle is also preferably performed.
- the cleaning process consists in performing a periodic "washing" of the inner walls 16a of the condenser 16 by activating the air circulating device 14, and in particular the centrifugal fan 40, when a prefixed quantity of liquid is present in the tub 3. Presence of such prefixed quantity of liquid is advantageously carried out by means of the pressure sensor at the bottom of the tub 3, or by means of equivalent liquid level detecting means.
- the cleaning process may preferably take place during the washing cycle when liquid, i.e. water and/or water mixed with detergent, occupied the bottom of the tub 3.
- the process may be started at any time, for example when the machine 1 is empty, by providing a prefixed quantity of water inside the tub 3.
- the activation of the fan 40 causes, due to its non negligible prevalence, a suction of liquid through the outlet hole 3b of the tub 3, being said outlet hole 3b opportunely located at a lower level relative to the liquid's level inside the tub 3 corresponding to the prefixed quantity of water.
- a control unit 22 is preferably connected to the various parts of the machine 1 in order to ensure its operation.
- the control unit 22 is advantageously connected also to an interface unit 22a which is accessible to the user and by means of which the user selects and sets the desired parameters from time to time, in particular the desired washing and drying program.
- interface unit 22a which is accessible to the user and by means of which the user selects and sets the desired parameters from time to time, in particular the desired washing and drying program.
- other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, the load in terms of weight of the laundry to be washed, the type of fabric of the load, etc.
- control unit 22 Based on the parameters acquired by said interface unit 22a, the control unit 22 advantageously sets and controls the various parts of the laundry washing machine 1 in order to carry out the desired washing and drying program.
- the user may therefore select a single washing program or a washing program followed by a drying program or a single drying program.
- the user can preferably select when the condenser cleaning cycle as to be performed.
- the interface unit 22a could be provided with a dedicated "condenser cleaning cycle" button for manually starting the condenser cleaning cycle.
- starting of the condenser cleaning cycle could be advantageously programmed through the interface unit 22a, for example by setting an automatic condenser cleaning cycle after or before each drying cycle or before each washing cycle.
- the air circulating device 14 is designed to generate a first air stream when a drying cycle is performed and to generate a second air stream, different from the first air stream, when a condenser cleaning cycle is performed.
- the first air stream generated by the air circulating device 14 during the drying process has a different volumetric flow rate with respect to the second air stream generated by the air circulating device 14 during a condenser cleaning cycle.
- the air circulating device 14 preferably comprises a speed regulator 41 for the electric centrifugal fan 40.
- the speed regulator 41 preferably comprises an inverter motor control which allows the rotational speed of the electric centrifugal fan 40 to be varied.
- the electric centrifugal fan 40 can work at different speeds, preferably at different fixed desired speeds.
- the inverter motor control 41 is advantageously connected to the control unit 22 and opportunely driven by it.
- the electric centrifugal fan 40 is rotated at a first rotational speed, preferably between 2900 rpm and rpm 3800, more preferably at 3000 rpm.
- the first rotational speed generates a respective first air stream along the air cooling device 6 and along the air heating device 7.
- the intensity of the first air stream which depends on the value of the first rotational speed, is advantageously chosen so that the laundry 10 can be optimally dried.
- the first rotational speed may not be set at a constant value but can be advantageously varied during the drying cycle, preferably inside the above mentioned range.
- first rotational speed may also be constant during the drying cycle.
- the electric centrifugal fan 40 is again rotated, but at a second rotational speed, preferably between 3900 rpm and rpm 4500, more preferably at 4200 rpm.
- the second rotational speed generates a respective second air stream along the air cooling device 6 which causes suction of liquid through the outlet hole 3b of the tub 3, as explained above.
- the intensity of the second air stream which depends on the value of the second rotational speed, is advantageously chosen so that the sucked liquid inside the condenser 16 may reach also the upper portion of the inner walls 16a of the condenser 16.
- the intensity of this second air stream is preferably higher than the intensity of the first air stream. Therefore, the second rotational speed for the electric centrifugal fan 40 is opportunely chosen as having a higher value with respect to the first rotational speed.
- the second rotational speed may not be set at a constant value but can be advantageously varied during the condensed cleaning cycle, preferably inside the above mentioned range.
- the level of the sucked liquid inside the condenser 16 may vary according to the second rotational speed variation so that the cleaning effect for the inner walls 16a may be enhanced.
- the second rotational speed may also be constant during the condenser cleaning cycle.
- the provision of a speed regulator 41 for the fan 40 makes it possible to increase the rotational speed of the fan 40 during the condenser cleaning cycle and, therefore, to increase the condenser cleaning effect with respect to the cleaning process of the know machine where a single fan working at fixed speed is used in both drying and cleaning cycles.
- a speed regulator 41 for the fan 40 which increases the intensity of the second air stream, i.e. the intensity of the cleaning air stream, allows the reduction of the duration of the condenser cleaning cycle with respect to the know cleaning process.
- the laundry washing and drying machine 61 shown in Figure 4 differs from the laundry washing and drying machine 1 described with reference to Figures from 1 to 3 for the fact that the air circulating device 114 comprises a first electric centrifugal fan 140a working at a fixed first rotational speed and a second electric centrifugal fan 140b working at a fixed second rotational speed different from the first rotational speed.
- the two electrical fans 140a, 140b may be advantageously chosen so as to be substantially similar (i.e. have substantially the same shape, and therefore the same blowing power) one to the other.
- the second rotational speed is higher than the first rotational speed.
- the first electric centrifugal fan 140a is activated at the first rotational speed to generate the first air stream when a drying cycle is performed while the second centrifugal fan 140b is activated at the second rotational speed to generate the second air stream when a condenser cleaning cycle is performed.
- the second electrical fan 140b may comprise a motor having a higher power than the motor of the first electrical fan 140a.
- the intensity of the second air stream is therefore higher than the intensity of the first air stream, thus achieving the advantages above mentioned in the description of the first preferred embodiment.
- the two electrical fans 140a, 140b may be different and suitable for generating two streams having different intensity even if they are rotated at the same rotational speed.
- the laundry washing and drying machine 71 shown in Figure 5 differs from the laundry washing machine 1 described with reference to Figure 4 for the fact that the air circulating device 214 preferably comprises a first speed regulator 241a for the first electric centrifugal fan 240a and a second speed regulator 241b for the second electric centrifugal fan 240b.
- Each speed regulator 241a, 241b preferably comprises an inverter motor control which allows the rotational speed of the respective electric centrifugal fan 240a, 240b to be varied.
- the second rotational speed is higher than the first rotational speed.
- the first electric centrifugal fan 240a is activated at the first rotational speed to generate the first air stream when a drying cycle is performed while the second centrifugal fan 240b is activated at the second rotational speed to generate the second air stream when a cleaning cycle is performed.
- the intensity of the second air stream is therefore higher than the intensity of the first air stream, thus achieving the advantages above mentioned in the description of the first preferred embodiment.
- the rotational speed of the first and the second fan 240a, 240b may not be set at a constant value but can be advantageously varied, preferably inside a predetermined range.
- the level of the sucked liquid inside the condenser 16 may vary according to the second rotational speed variation so that the cleaning effect for the inner walls 16a may be enhanced.
- the intensity of the hot air stream H1 may vary according to the first rotational speed variation of the first fan 240a so that the heating effect may be enhanced.
- the laundry washing and drying machine comprises a single fan which can be rotated at a single rotational speed, and an air flux regulating device, for example a electromechanical actuated shutter or bulkhead, adapted to regulate the air flow rate channelled by the fan to the tubular body 12; in this way, by actuating the air flux regulating device, it is possible to circulate in the tubular body 12, and therefore in the condensing device 6 and in the heating device 7, a first air stream during the drying cycle, and a second air stream, different from the first air stream during the condensing cleaning cycle.
- an air flux regulating device for example a electromechanical actuated shutter or bulkhead
- a laundry washing and drying machine according to the invention has an efficient condenser cleaning system.
- the present invention allows all the set objects to be achieved.
- it makes it possible to obtain a laundry washing and drying machine with an increased condenser cleaning effect with respect to the known process.
- the present invention allows using an optimized air stream (i.e. an optimized volumetric flow rate of the air flux) both in the drying cycle and in the condenser cleaning cycle, so as to obtain the better performances in both these cycles.
- an optimized air stream i.e. an optimized volumetric flow rate of the air flux
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- Detail Structures Of Washing Machines And Dryers (AREA)
Claims (15)
- Machine à laver et sécher le linge (1 ; 61 ; 71), comprenant :- un boîtier extérieur (2) ;- un bac (3) extérieur à un tambour (9) approprié pour recevoir du linge (10) devant être lavé et/ou séché ;- un système de traitement d'air (5) reliant un trou de sortie d'air (3b) dudit bac (3) à un trou d'entrée d'air (3a) dudit bac (3) pour faire circuler de l'air chaud à travers ledit bac (3), ledit système de traitement d'air (5) comprenant :- un dispositif de condensation (6) pour déshumidifier l'air humide (H2) provenant dudit trou de sortie d'air (3b) ;- un dispositif de chauffage d'air (7) pour chauffer l'air déshumidifié provenant dudit dispositif de condensation (6) et pour produire de l'air chaud (H1) devant être transporté jusqu'audit trou d'entrée (3a) ;- un dispositif de circulation d'air (14 ; 114 ; 214) pour forcer l'air à travers ledit dispositif de condensation (6) et ledit dispositif de chauffage (7) ;ledit dispositif de circulation d'air (14 ; 114 ; 214) générant :- un premier flux d'air pour faire circuler ledit air chaud (H1) à travers ledit bac (3) pour sécher ledit linge (10) au cours d'un cycle de séchage de la machine ;- un deuxième flux d'air, différent dudit premier flux d'air, pour aspirer du liquide provenant dudit trou de sortie (3b) pour nettoyer ledit dispositif de condensation (14 ; 114 ; 214) au cours d'un cycle de nettoyage du condenseur de la machine,caractérisée en ce que
ledit deuxième flux d'air présente un débit volumétrique différent de celui dudit premier flux d'air. - Machine (1 ; 61 ; 71) selon la revendication 1, caractérisée en ce que l'intensité dudit deuxième flux d'air est supérieure à l'intensité dudit premier flux d'air.
- Machine (1 ; 71) selon la revendication 1 ou 2, caractérisée en ce que ledit dispositif de circulation d'air (14 ; 214) comprend un ventilateur (40 ; 240a, 240b) et un dispositif régulateur de vitesse (41 ; 241a, 241b) pour ledit ventilateur (40 ; 240a, 240b) afin de générer ledit premier ou ledit deuxième flux d'air.
- Machine (61 ; 71) selon la revendication 1 ou 2, caractérisée en ce que ledit dispositif de circulation d'air (114 ; 214) comprend un premier ventilateur (140a ; 240a) pour générer ledit premier flux d'air et un deuxième ventilateur (140b ; 240b) pour générer ledit deuxième flux d'air.
- Machine (61) selon la revendication 4, caractérisée en ce que ledit premier ventilateur (140a) est similaire audit deuxième ventilateur (140b) et la vitesse de rotation de travail dudit deuxième ventilateur (140b) est supérieure à la vitesse de rotation de travail dudit premier ventilateur (140b).
- Machine (61) selon la revendication 4, caractérisée en ce que la puissance dudit deuxième ventilateur (140b) est supérieure à la puissance dudit premier ventilateur (140a).
- Machine (71) selon l'une quelconque des revendications 4 à 6, caractérisée en ce que ledit dispositif de circulation d'air (214) comprend un dispositif régulateur de vitesse (241a) pour ledit premier ventilateur (240a) et/ou un dispositif régulateur de vitesse (241b) pour ledit deuxième ventilateur (240b).
- Machine (1 ; 61 ; 71) selon l'une quelconque des revendications 3 à 7, caractérisée en ce que ledit ventilateur (40 ; 140a, 140b ; 240a, 240b) comprend un ventilateur centrifuge électrique (40 ; 140a, 140b ; 240a, 240b).
- Machine (1 ; 71) selon la revendication 3 ou 7, caractérisée en ce que ledit dispositif régulateur de vitesse (41 ; 241a, 241b) comprend un inverseur.
- Machine (1 ; 61 ; 71) selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit dispositif de condensation (6) comprend un conduit (38) et un dispositif d'alimentation en eau (30) pour refroidir et déshumidifier l'air humide (H2) s'écoulant à travers ledit conduit (38) .
- Machine (1 ; 61 ; 71) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend un dispositif de détection de liquide approprié pour détecter la présence de liquide à l'intérieur dudit bac.
- Machine (1 ; 61 ; 71) selon la revendication 11, caractérisée en ce que ledit deuxième flux d'air est généré lorsque la présence de liquide dans ledit bac est détectée par ledit dispositif de détection de liquide.
- Machine (1 ; 61 ; 71) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend une unité de commande (22) appropriée pour commander l'intensité dudit premier flux d'air et/ou l'intensité dudit deuxième flux d'air.
- Machine (1 ; 61 ; 71) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend en outre une unité d'interface (22a) accessible à un utilisateur.
- Procédé pour faire fonctionner une machine à laver et sécher du linge (1 ; 61 ; 71), dans lequel ladite machine à laver et sécher comprend :- un bac (3) extérieur à un tambour (9) approprié pour recevoir du linge (10) devant être lavé et/ou séché ;- un système de traitement d'air (5) reliant un trou de sortie d'air (3b) dudit bac (3) à un trou d'entrée d'air (3a) dudit bac (3) pour faire circuler de l'air chaud à travers ledit bac (3), ledit système de traitement d'air (5) comprenant :- un dispositif de condensation (6) pour déshumidifier l'air humide (H2) provenant dudit trou de sortie d'air (3b) ;- un dispositif de chauffage d'air (7) pour chauffer l'air déshumidifié provenant dudit dispositif de condensation (6) et pour produire de l'air chaud (H1) devant être transporté jusqu'audit trou d'entrée (3a) ;- un dispositif de circulation d'air (14 ; 114 ; 214) pour forcer l'air à travers ledit dispositif de condensation (6) et ledit dispositif de chauffage (7) ;ledit procédé comprenant :l'utilisation d'un premier flux d'air pour faire circuler ledit air chaud (H1) à travers ledit bac (3) lors du séchage dudit linge (10) et l'utilisation d'un deuxième flux d'air, différent dudit premier flux d'air, pour aspirer du liquide provenant dudit trou de sortie (3b) lors du nettoyage dudit dispositif de condensation (14 ; 114 ; 214),caractérisé en ce que ledit deuxième flux d'air a un débit volumétrique différent de celui dudit premier flux d'air.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12157424.8A EP2634301B1 (fr) | 2012-02-29 | 2012-02-29 | Machine à laver et sécher le linge domestique avec un dispositif de condensation et prodédé de fonctionnement de cette machine |
PCT/EP2013/053882 WO2013127823A1 (fr) | 2012-02-29 | 2013-02-27 | Machine à laver et à sécher le linge domestique avec un dispositif de condensation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12157424.8A EP2634301B1 (fr) | 2012-02-29 | 2012-02-29 | Machine à laver et sécher le linge domestique avec un dispositif de condensation et prodédé de fonctionnement de cette machine |
Publications (2)
Publication Number | Publication Date |
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EP2634301A1 EP2634301A1 (fr) | 2013-09-04 |
EP2634301B1 true EP2634301B1 (fr) | 2019-10-23 |
Family
ID=47754520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12157424.8A Active EP2634301B1 (fr) | 2012-02-29 | 2012-02-29 | Machine à laver et sécher le linge domestique avec un dispositif de condensation et prodédé de fonctionnement de cette machine |
Country Status (2)
Country | Link |
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EP (1) | EP2634301B1 (fr) |
WO (1) | WO2013127823A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107447458B8 (zh) * | 2016-07-21 | 2022-08-16 | 博西华电器(江苏)有限公司 | 冷凝式干衣机 |
US10633785B2 (en) | 2016-08-10 | 2020-04-28 | Whirlpool Corporation | Maintenance free dryer having multiple self-cleaning lint filters |
US10738411B2 (en) | 2016-10-14 | 2020-08-11 | Whirlpool Corporation | Filterless air-handling system for a heat pump laundry appliance |
US10519591B2 (en) | 2016-10-14 | 2019-12-31 | Whirlpool Corporation | Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers |
US10502478B2 (en) | 2016-12-20 | 2019-12-10 | Whirlpool Corporation | Heat rejection system for a condenser of a refrigerant loop within an appliance |
US10514194B2 (en) | 2017-06-01 | 2019-12-24 | Whirlpool Corporation | Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators |
US10718082B2 (en) | 2017-08-11 | 2020-07-21 | Whirlpool Corporation | Acoustic heat exchanger treatment for a laundry appliance having a heat pump system |
CN111850932B (zh) * | 2019-04-19 | 2022-11-18 | 青岛海尔洗衣机有限公司 | 一种洗干一体式洗衣机及其烘干方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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IT1250376B (it) | 1991-02-06 | 1995-04-07 | Zanussi Elettrodomestici | Procedimento per la pulizia del condensatore di asciugatura in una asciugabiancheria |
DE4303655A1 (de) * | 1993-02-09 | 1994-08-11 | Miele & Cie | Programmgesteuerter Waschtrockner |
DE19952751B4 (de) * | 1999-11-02 | 2009-01-02 | BSH Bosch und Siemens Hausgeräte GmbH | Wäschetrockner mit einem selbstreinigenden Flusenfilter |
DE102006061211A1 (de) * | 2006-12-22 | 2008-06-26 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Entfernen von Flusen aus einem Wärmetauscher eines Hausgeräts, sowie entsprechendes Hausgerät |
CN101988260B (zh) * | 2009-07-30 | 2013-06-12 | 博西华电器(江苏)有限公司 | 设有烘干程序的衣物洗涤设备及其控制方法 |
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2012
- 2012-02-29 EP EP12157424.8A patent/EP2634301B1/fr active Active
-
2013
- 2013-02-27 WO PCT/EP2013/053882 patent/WO2013127823A1/fr active Application Filing
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EP2634301A1 (fr) | 2013-09-04 |
WO2013127823A1 (fr) | 2013-09-06 |
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