EP3486365A1 - Laundry washing machine with an automatic dosing device - Google Patents
Laundry washing machine with an automatic dosing device Download PDFInfo
- Publication number
- EP3486365A1 EP3486365A1 EP18208824.5A EP18208824A EP3486365A1 EP 3486365 A1 EP3486365 A1 EP 3486365A1 EP 18208824 A EP18208824 A EP 18208824A EP 3486365 A1 EP3486365 A1 EP 3486365A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine
- container
- washing
- washing tub
- dispensing line
- 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
- 238000010412 laundry washing Methods 0.000 title claims abstract description 88
- 238000005406 washing Methods 0.000 claims abstract description 145
- 239000007788 liquid Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 230000003213 activating effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000008400 supply water Substances 0.000 claims description 3
- 239000003599 detergent Substances 0.000 description 45
- 239000007844 bleaching agent Substances 0.000 description 16
- 238000001914 filtration Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 6
- 239000002979 fabric softener Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011012 sanitization Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
- D06F39/022—Devices for adding soap or other washing agents in a liquid state
-
- 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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
Definitions
- the present invention concerns the field of laundry washing techniques.
- the present invention refers to a laundry washing machine equipped with an automatic dosing device for wash products.
- laundry washing machines both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
- laundry washing machine will refer to both simple laundry washing machines and laundry washing-drying machines.
- Laundry washing machines generally comprise an external casing, or cabinet, provided with a washing tub which contains a rotatable perforated drum where the laundry is placed.
- a loading/unloading door ensures access to the drum.
- Laundry washing machines typically comprise a water supply unit and a products supply unit for the introduction of water and washing/rinsing products (i.e. detergent, softener, rinse conditioner, etc.) into the tub.
- washing/rinsing products i.e. detergent, softener, rinse conditioner, etc.
- the products supply unit may also be advantageously equipped with an automatic dosing device which is able to dose powder, liquid or other kinds of wash products from a container into the tub.
- the dosing device comprises one or more multidose containers, such as dispenser cartridges, which are filled with a large amount of a respective wash product that is then dispensed in a predetermined dose at any single washing cycle.
- Each multidose container is therefore advantageously filled with a quantity of wash product sufficient for several washing cycles.
- the multidose container is part of a removable drawer which is slidably received in a housing located within the cabinet.
- the housing is conformed so as to define at its bottom a lower dispensing housing (flushing chamber).
- the lower dispensing housing advantageously underlies the multidose container/s when the drawer sits in a closed position.
- a dose of wash product is conveyed from the multidose container into the lower dispensing housing, or flushing chamber.
- a proper flushing volume of water coming from an external water supply line is made flow through the flushing chamber and the water with the wash product then flow inside the tub.
- a drawback posed by known automatic dosing devices lies in that they require a flushing chamber so that water may be provided to flush the wash products to the washing tub.
- a further drawback posed by said automatic dosing devices lies in that they require complex water paths to convey water from the external water supply line to the flushing chamber and from there to the washing tub and also require complex wash products paths to convey wash products from the containers to the flushing chamber.
- the object of the present invention is therefore to overcome the drawbacks posed by the known techniques.
- a laundry washing machine comprising an automatic dosing device having at least one container suitable for receiving an amount of wash product sufficient for a plurality of washing cycles and having a recirculation circuit for transferring liquid from a first region of the washing tub and for re-admitting the liquid into a second region of the washing tub wherein the automatic dosing device comprises a dispensing line terminating at said recirculation circuit which allows to convey the wash product from the at least one container to the washing tub, it is possible to reduced the complexity and/or the size of the automatic dosing device and of the laundry washing machine compared to known system.
- the present invention relates, therefore, to a laundry washing machine comprising:
- dispensing line comprises an inlet side connected to said at least one container and an outlet side connected to the recirculation circuit.
- the dispensing line comprises a dispenser pump suitable for forcing said at least one wash product inside the dispensing line.
- the automatic dosing device comprises a dispenser pump and wherein the dispensing line is fluidly connected between an outlet of the dispenser pump and the recirculation circuit.
- said at least one container is a removable container.
- the inlet side of the dispensing line and said at least one container are coupable through a connecting device.
- the connecting device preferably comprises a male portion communicating with the inlet side of the dispensing line or with the container and a female portion communicating with the container or with the inlet of the dispensing line.
- the male portion and the female portion are removable connectable one to the other.
- said at least one container is received in a drawer slidably coupled to the cabinet.
- said at least one container is received in a drawer slidably coupled to the cabinet and wherein the connecting device preferably comprises a male portion communicating with the inlet side of the dispensing line or with the container and a female portion communicating with the container or with the inlet of the dispensing line, the male portion being connected to the female portion when the drawer is in its inserted position and the male portion being disconnected from the female portion when the drawer is in its extracted position.
- the drawer comprises the interface unit.
- said at least one container is slidably arranged in the upper side of the cabinet so as to be accessible from the upper side of the cabinet.
- the recirculation circuit comprises a recirculation pump suitable for forcing liquid inside the recirculation circuit.
- the recirculation circuit preferably comprises a first pipe fluidly connecting the washing tub to the recirculation pump.
- the recirculation circuit then preferably comprises a second pipe fluidly connecting the recirculation pump to the washing tub.
- the dispensing line terminates at the first pipe or at the second pipe of the recirculation circuit.
- the dispensing line terminates close to a terminal nozzle of the second pipe.
- the first region is a bottom region of the washing tub.
- the second region is a bottom region of the washing tub or an upper region of the washing tub.
- the method further comprises a single-use wash products dispenser comprising at least one compartment suitable for receiving a dose of said at least one wash product at the beginning of each single washing cycle and the dose is then completely used in the single washing cycle.
- said at least one compartment of the products dispenser and said at least one container of the automatic dosing device are part of a drawer slidably received in the cabinet.
- the drawer is slidablyreceived in a drawer housing located within the cabinet.
- the drawer housing is suitable to receive said at least one wash product from said at least one container of the automatic dosing device and the drawer housing is fluidly connected to the washing tub.
- the recirculation circuit comprises a first circuit adapted to drain liquid from a bottom region of the washing tub and to re-admit such a liquid into the bottom region of the washing tub and wherein the dispensing line terminates at any point of the first recirculation circuit.
- the recirculation circuit comprises a second circuit adapted to drain liquid from a bottom region of the washing tub and to re-admit such a liquid into an upper region of the washing tub and wherein the dispensing line terminates at any point of the second recirculation circuit.
- the present invention concerns a method for operating a laundry washing machine according to any of the preceding claims, wherein the method comprises a step of activating said dispensing line for conveying said at least one wash product from said at least one container to said washing tub and a step of activating said recirculation circuit for transferring liquid from said first region of said washing tub and for re-admitting said liquid into said second region of said washing tub.
- the step of activating the dispensing line comprises a step of activating a dispenser pump of said dispensing line.
- the step of activating the recirculation circuit comprises a step of activating a recirculation pump of said recirculation circuit.
- the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to laundry washing machines. On the contrary, the present invention can be conveniently applied to laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
- laundry washing machine will refer to both simple laundry washing machines and laundry washing-drying machines.
- the laundry washing machine 1 comprises an external casing or cabinet 2, in which a washing tub 3 is provided that contains a perforated washing drum 4 where the laundry to be treated can be loaded.
- the tub 3 and the drum 4 both preferably have a substantially cylindrical shape. Between the tub 3 and the drum 4 a gap 55 is defined.
- the cabinet 2 is provided with a loading/unloading door 8 which allows access to the drum 4.
- the tub 3 is preferably suspended in a floating manner inside the cabinet 2, advantageously by means of a number of coil springs and shock-absorbers 9.
- the drum 4 is advantageously rotated by an electric motor, not illustrated, which preferably transmits the rotating motion to the shaft of the drum 4, advantageously by means of a belt/pulley system.
- the motor can be directly associated with the shaft of the drum 4.
- the drum 4 is advantageously provided with holes which allow the liquid flowing therethrough. Said holes are typically and preferably homogeneously distributed on the cylindrical side wall of the drum 4.
- the tub 3 is preferably connected to the cabinet 2 by means of an elastic bellows 7, or gasket.
- the tub 3 preferably comprises two complementary hemi-shells 13 and 14 structured for being reciprocally coupled to form the tub 3.
- Laundry washing machine 1 advantageously comprises a control unit 11 connected to the various parts of the laundry washing machine 1 in order to ensure its operation.
- Laundry washing machine 1 preferably comprises an interface unit 16 (control panel), connected to the control unit 11, accessible to the user and by means of which the user may select and set the washing parameters, like for example a desired washing program.
- the washing parameters like for example a desired washing program.
- other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, etc.
- the bottom region 3a of the tub 3 preferably comprises a seat 15, or sump, suitable for receiving a heating device 10, as illustrated in Figure 6 .
- the heating device 10 when activated, heats the liquid inside the sump 15.
- the heating device 10 preferably comprises an electrical resistor of serpentine type.
- the heating device 10 is horizontally placed in the sump 15 and it extends substantially from a front part up to a rear part of the sump 15.
- the bottom region of the tub may be configured differently.
- the bottom region of the tub may not comprise a seat for the heating device.
- the heating device may be advantageously placed in the annular gap between the tub and the drum.
- the heating device may not be present.
- the required heated water may come from an external hot water source.
- the heating device may be different and suitable to heat the liquid in the tub, for example a hot air stream, a steam flow, microwaves source, infra-red rays, etc..
- Laundry washing machine 1 advantageously comprises a water outlet circuit 25 suitable for withdrawing liquid from the bottom region 3a of the tub 3.
- the water outlet circuit 25 preferably comprises a main pipe 17, a draining pump 26 and an outlet pipe 28 ending outside the cabinet 2.
- the water outlet circuit 25 preferably further comprise a filtering device 12 arranged between the main pipe 17 and the draining pump 26.
- the filtering device 12 is adapted to retain all the undesirable bodies (for example buttons that have come off the laundry, coins erroneously introduced into the laundry washing machine, etc.).
- This filtering device 12 can preferably be removed, and then cleaned, through a gate 14 placed advantageously on the front wall of the cabinet 2 of the laundry washing machine 1, as illustrated in Figures 1 and 2 .
- the main pipe 17 connects the bottom region 3a of the tub 3 to the filtering device 12.
- An inlet end 17a of the main pipe 17 is advantageously positioned at the lower point of the tub 3, more preferably at the lower point of the sump 15, as illustrated in Figure 7 .
- An outlet end 17b of the main pipe 17 is connected to a front part 12a of the filtering device 12.
- the filtering device 12 may be provided directly in the tub 3, preferably obtained in a single piece construction with the latter. In this case the filtering device 12 is fluidly connected to the outlet of the tub 3, in such a way that water or washing liquid drained from the tub 3 enters the filtering device 12.
- the draining pump 26 is preferably connected to a rear part 12b of the filtering device 12 and conveys the liquid to the outlet pipe 28 through an outlet 29, the latest better visible in Figure 6 where the outlet pipe 28 has been removed.
- Activation of the drain pump 26 drains the liquid, for example dirty water or water mixed with washing and/or rinsing products, from the tub 3 to the outside.
- Laundry washing machine 1 advantageously comprises a first recirculation circuit 30, or mixing circuit 30.
- the mixing circuit 30 is adapted to drain liquid from the bottom region 3a of the tub 3 and to re-admit such a liquid (recirculated mixing liquid) into a first region of the tub 3, which corresponds substantially to the same bottom region 3a of the tub 3.
- the mixing circuit 30 is adapted to drain liquid from the bottom of the sump 15 and to re-admit such a liquid again into the sump 15. More preferably, the liquid is re-admitted again into the sump 15 below the heating device 10.
- the mixing circuit 30 preferably comprises a first recirculation pump 31, a first recirculation pipe 32 connecting the filtering device 12 to the first recirculation pump 31 and a second recirculation pipe 33 connecting the first recirculation pump 31 to the bottom region 3a of the tub 3.
- the second recirculation pipe 33 is advantageously provided with a terminal portion 34, or nozzle, better visible in Figure 6 .
- the terminal portion 34 advantageously ends inside the sump 15, as mentioned above.
- the liquid from the bottom region 3a of the tub 3 is conveyed again towards the bottom region 3a of the tub 3 by activation of the first recirculation pump 31.
- the liquid from the bottom region 3a of the tub 3 is conveyed towards the bottom region 3a of the tub 3 in the gap 55 between the tub 3 and the drum 4.
- the mixing circuit may comprise a dedicated pipe connecting the bottom region of the tub to the recirculation pump; in this case the mixing circuit is advantageously completely separated from the water outlet circuit, i.e. completely separated from the filtering device 12 and the main pipe 17.
- the mixing circuit is preferably realized for transferring a portion of a liquid from a bottom region of the tub to the same bottom region for mixing and/or dissolving the products.
- the mixing circuit is preferably realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid into the washing tub such that at least a portion of the re-admitted liquid reaches the bottom region of the washing tub without entering the washing drum.
- the mixing circuit is realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid into the washing tub such that all, or substantially all, the re-admitted liquid reaches the bottom region of the washing tub without entering the washing drum.
- Laundry washing machine 1 preferably comprises a second recirculation circuit 20 adapted to drain liquid from the bottom region 3a of the tub 3 and to re-admit such a liquid into a second region 3b, or upper region, of the tub 3.
- the second recirculation circuit 20 preferably comprises a second recirculation pump 21, a first recirculation pipe 22 connecting the filtering device 12 to the second recirculation pump 21 and a second recirculation pipe 23 connecting the second recirculation pump 21 to the upper region 3b of the tub 3.
- the second recirculation pipe 23 is preferably provided with a terminal nozzle 23a arranged preferably at the upper region 3b of the tub 3.
- the terminal nozzle 23a is opportunely arranged so that the liquid is sprayed into the perforated drum 4.
- terminal nozzle 23a is integrally formed in the bellows 7, as visible in Figure 4 , and the liquid is therefore advantageously sprayed in a direction against the perforated drum 4.
- the liquid from the bottom region 3a of the tub 3 is conveyed towards the upper region 3b of the tub 3 by activation of the second recirculation pump 21.
- the second recirculation circuit 20 is advantageously activated in order to improve wetting of the laundry inside the drum 4 and for reducing the water required in the whole washing cycle.
- the second recirculation circuit is properly realized for transferring a portion of a liquid from a bottom region of the tub, preferably from the sump, to an upper region of the tub in order to enhance absorption of the liquid by the laundry.
- laundry washing machine 1 comprises a device 19 suited to sense (or detect) the liquid level inside the tub 3.
- the sensor device 19 preferably comprises a pressure sensor which senses the pressure in the tub 3. From the values sensed by the sensor device 19 it is possible to determine the liquid level of the liquid inside the tub 3.
- laundry washing machine may preferably comprise (in addition to or as a replacement of the pressure sensor) a level sensor (for example mechanical, electro-mechanical, optical, etc.) adapted to sense (or detect) the liquid level inside the tub 3.
- the laundry washing machine 1 advantageously comprises a wash products dispenser 59 to supply wash products into the tub 3 during a washing cycle.
- Wash products may comprise, for example, detergent, rinse additives, fabric softener or fabric conditioners, waterproofing agents, fabric enhancers, rinse sanitization additives, chlorine-based additives, etc..
- the wash products dispenser 59 preferably comprises a single-use wash products dispenser 60 and an automatic dosing device 70 for multiple doses of wash products.
- the single-use wash products dispenser 60 comprises three compartments 61, 62 and 63 suited to be filled, for example, with detergent D, fabric softener S and bleach B.
- the single-use wash products dispenser may comprise further compartments suited to be filled with other type of wash products which are suitable to be used in the washing cycle.
- Compartments 61, 62 and 63 of the single-use wash products dispenser 60 are filled with the respective wash product at the beginning of each washing cycle.
- the automatic dosing device 70 here described and illustrated comprises a main container 71 which may be filled with a large amount of wash product, in particular detergent D, which is then dispensed in a predetermined dose during each washing cycle.
- the main container 71 is therefore filled with a quantity of detergent D sufficient for several washing cycles.
- the main container 71 advantageously comprises an inlet 90 with cover 91 for introduction of detergent D by the user.
- the compartments 61, 62 and 63 of the single-use wash products dispenser 60 and the main container 71 of the automatic dosing device 70 are part of a drawer 6 slidably received in a drawer housing 40 located within the cabinet 2.
- the compartments 61, 62 and 63 are then preferably open at their upper side so that they can be easily filled by the user with the respective wash product.
- the main container 71 is preferably a removable container 71, or cartridge, as illustrated in particular in Figure 2 .
- the user may easily remove the cartridge 71 to refill it with detergent D or to replace it with another.
- the main container may be fixed to the drawer.
- the main container 71 preferably has a substantially rectangular box-like shape which is capable of being received within the drawer 6.
- the main container may have any shape and size that is receivable within the drawer.
- the container may be flexible, rigid, expandable, or collapsible and may be made of any type of material.
- the wash products dispenser 59 comprises both a single-use wash products dispenser 60 and an automatic dosing device 70 for multiple doses of wash products.
- the washing cycle may be carried out using only the automatic dosing device 70.
- the washing cycle will use a dose of detergent D supplied by the automatic dosing device 70. In this case, therefore, the use of the single-use wash products dispenser 60 will be neglected.
- the washing cycle may be carried out using only the single-use wash products dispenser 60.
- the washing cycle can use a dose of detergent D and/or a dose of softener S and/or a dose of bleach B supplied by the wash products dispenser 60. In this case, therefore, the use of the automatic dosing device 70 will be neglected.
- the washing cycle may be carried out using both the single-use wash products dispenser 60 and the automatic dosing device 70.
- the washing cycle can use a dose of detergent D supplied by the automatic dosing device 70 and a dose of softener S and/or a dose of bleach B supplied by the wash products dispenser 60.
- the choice of the desired washing cycle between the different mentioned washing cycles i.e. the use of both the single-use wash products dispenser and the automatic dosing device or the use of only one of them, may be preferably carried automatically by the laundry washing machine which may sense the presence of wash products in the respective compartments or containers.
- the laundry washing machine may sense the presence of wash products in the respective compartments or containers through suitable sensors preferably arranged at said compartments and/or containers.
- the sensor may be, for example, a conductivity sensor.
- the choice of the desired washing cycle may be preferably directly inputted by the user through the interface unit 16.
- the drawer housing 40 which receives the drawer 6 in its closed position, preferably has a sloped bottom wall 41 and an outlet 42 located at the rear of the sloped bottom wall 41.
- the outlet 42 communicates with a supply pipe 18 connected to the tub 3.
- the supply pipe 18, as schematically illustrated in Figure 3 and visible in Figures 5 and 9 , is preferably arranged laterally with respect to the tub 3 and preferably terminates at an upper region 3b of the tub 3. More preferably, the supply pipe 18 terminates at a rear side of the tub 3.
- a water supply unit 5 is arranged in the upper part of the laundry washing machine 1 and is suited to supply water from an external supply line E.
- the water supply unit 5 advantageously comprises two controlled supply valve 5a, 5b and conduits 43a, 43b which terminate at the products dispenser 60 towards the compartments 61, 62 and 63, as better visible in Figure 8A .
- the supply valve 5a, 5b are properly controlled, opened and closed, during the washing cycle.
- the water from the external supply line E is directed to one of the compartments 61, 62 and 63 by means of internal water paths (not illustrated) located in interior of the products dispenser 60.
- Water is thus provided to one of the compartments 61, 62 and 63 to flush detergent D or fabric softener S or bleach B from the respective compartment 61, 62 and 63 to the tub 3 through the drawer housing 40, the outlet 42 and the supply pipe 18.
- the water supply unit 5 also preferably comprises a water flow sensor (not shown), for example a flow meter, which makes it possible to calculate the quantity of water supplied from the external supply line E.
- a water flow sensor for example a flow meter
- the automatic dosing device 70 preferably comprises a dispensing line 72 suited to fluidly connecting the container 71 to the washing tub 3 for conveying the wash product (detergent D) from the container 71 to the washing tub 3.
- the dispensing line 72 advantageously comprises a conduit 76.
- the dispensing line 72 has an inlet side 73 coupable to the container 71 and an outlet side 74 coupled to one of the recirculation circuits.
- the outlet side 74 of the dispensing line 72 is coupled to the second recirculation circuit 20 in a junction area 92. More preferably, the outlet side 74 of the dispensing line 72 is coupled to the second recirculation pipe 23 close to terminal nozzle 23a.
- the outlet side of the dispensing line 72 may terminate at any other point of the second recirculation circuit 20, for example at any point of the second recirculation pipe 23 (see junction area 92a) or at any point of the first recirculation pipe 22 (see junction area 92b).
- the outlet side 74 of the dispensing line 72 may terminate at any other point of the first recirculation circuit 30, for example at any point of the second recirculation pipe 33 (see junction area 92c) or at any point of the first recirculation pipe 32 (see junction area 92d).
- the inlet side 73 of the dispensing line 72 preferably comprises a dispenser pump 75 which is properly controlled, activated and de-activated, during the washing cycle.
- the dispenser pump 75 is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from the container 71 to the washing tub 3.
- the dispenser pump may be located at any point of the dispensing line.
- the inlet side 73 of the dispensing line 72 is then advantageously fluidly connectable to the container 71.
- the container 71 and the drawer 6 may assume an inserted working position, as illustrated for example in Figures 8, 8A and 9 , or an extracted position, as illustrated for example in Figures 10, 10A and 11 .
- the inlet side 73 of the dispensing line 72 and the container 71 are coupled through a connecting device 77.
- the connecting device 77 preferably comprises a male portion 78 which communicates with the dispenser pump 75 and a female portion 79 which communicates with the container 71.
- the female portion 79 of the container 71 is inserted in the male portion 78 when the container 71 is in its closed working position (as illustrated in Figure 8A ).
- the male portion 78 preferably comprises a valve, not illustrated, which is opened when the container 71 is in its closed working position and is automatically closed when the container 71 and the drawer 6 are moved towards the open position, so as to avoid detergent leakage.
- the male portion may communicate with the container dispenser and the female portion may communicate with the dispenser pump
- the connecting device may be differently realized.
- the dispenser pump 75 is opportunely activated during the washing cycle for transferring a dose of detergent D to the washing tub 3.
- the second recirculation circuit 20 is activated during the washing cycle together with the activation of the dispenser pump 75.
- the second recirculation circuit 20 is activated when liquid, in particular water, is present at the bottom region 3a of the tub 3.
- detergent D coming from the dispensing line 72 (from the conduit 76) and liquid (for example water) flowing through the second recirculation pipe 23 are mixed together in the junction area 92 and hence homogenously sprayed over the laundry through the terminal nozzle 23a.
- the automatic dosing device 70 with a dedicated dispensing line 72 for conveying the wash product (detergent D) from the container 71 to the washing tub 3 it is not necessary to provide a flushing chamber where the wash product (detergent D) is conveyed and where water is provided to flush the wash product to the washing tub.
- the reduced complexity and size of the automatic dosing device gives freedom to place the dosing device in a favourable position of the cabinet, as will become apparent from the description of other embodiments throughout the description.
- the provision of the automatic dosing device 70 with a dedicated dispensing line 72 terminating at a recirculation circuit allows mixing of the detergent with liquid flowing in the recirculation circuit and thus allows dilution of the detergent before it reaches the laundry.
- detergent D causes stains or halos on the laundry, as it may happen if detergent D is directly put on laundry.
- the provision of the automatic dosing device 70 with a dedicated dispensing line 72 terminating at a recirculation circuit enhances a good dissolution of the detergent D in the water before it reaches the laundry.
- the wash products dispenser 59 comprises both the single-use wash products dispenser 60 and the automatic dosing device 70 for multiple doses of wash products.
- the wash products dispenser may comprise only the automatic dosing device for multiple doses of wash products, while the single-use wash products dispenser may be absent.
- the wash products dispenser 159 preferably comprises a single-use wash products dispenser 160 and a separated automatic dosing device 170 for multiple doses of wash products.
- the single-use wash products dispenser 160 may comprise one or compartments (not visible) suited to be filled with wash products which are suitable to be used in the washing cycle, for example detergent, fabric softener, bleach, etc..
- compartments of the single-use wash products dispenser 160 are part of a first drawer 106a slidably received in a housing located within the cabinet 2. Compartments of the single-use wash products dispenser 160 are filled with the respective wash product at the beginning of each washing cycle, as already explained above with reference to the first preferred embodiment.
- the automatic dosing device 170 here described and illustrated preferably comprises two containers 171a, 171b which may be filled with a large amount of wash product, for example detergent D and softener S, which are then dispensed in a predetermined dose during each washing cycle.
- the containers 171a, 171b are therefore filled with a quantity of detergent D and softener S sufficient for several washing cycles.
- Each container 171a, 171b advantageously comprises an inlet 190a, 190b with cover 191a, 191b for introduction of wash product by the user.
- the containers 171a, 171b of the automatic dosing device 170 are preferably part of a second drawer 106b slidably received in a housing located within the cabinet 2.
- the containers 171a, 171b are preferably removable containers 171a, 171b, or cartridge. The user may easily remove the cartridges 171a, 171b to refill them with detergent D and softener S or to replace them with others.
- the containers may be fixed to the second drawer 106b.
- the containers 171a, 171b preferably have a substantially rectangular box-like shape. In different embodiments, the containers may have any shape and size that is receivable within the second drawer 106b.
- the interface unit 16 (control panel) is arranged in a front side of the second drawer 106b.
- the interface unit 16 preferably comprises a display which displays machine working conditions and/or then preferably comprises one or more selector devices which allow to select the appropriate wash program and/or to set other parameters.
- the selector devices may comprise a rotary knob, push buttons, capacitive switches, touch screen, etc.
- the washing cycle may be carried out using only the automatic dosing device 170.
- the washing cycle will use a dose of detergent D and of softener S supplied by the automatic dosing device 170. In this case, therefore, the use of the single-use wash products dispenser 160 will be neglected.
- the washing cycle may be carried out using only the single-use wash products dispenser 160.
- the washing cycle can use a dose of detergent D and/or a dose of softener S and/or a dose of bleach B supplied by the wash products dispenser 160. In this case, therefore, the use of the automatic dosing device 170 will be neglected.
- the washing cycle may be carried out using both the single-use wash products dispenser 160 and the automatic dosing device 170.
- the washing cycle can use a dose of detergent D and of softener S supplied by the automatic dosing device 170 and a dose of bleach B supplied by the wash products dispenser 160.
- the choice of the desired washing cycle between the different mentioned washing cycles may be preferably carried automatically by the laundry washing machine which may sense the presence of wash products in the respective compartments or containers.
- the choice of the desired washing cycle may be preferably directly inputted by the user through the interface unit 16.
- the automatic dosing device 170 preferably comprises two dispensing lines 172a, 172b suited to fluidly connecting the containers 171a, 171b to the washing tub 3 for conveying the wash products (detergent D and softener S) from the containers 171a, 171b to the washing tub 3.
- the dispensing lines 172a, 172b advantageously comprise conduits 176a, 176b.
- each dispensing line 172a, 172b has an inlet side 173a, 173b coupable to the container 171a, 171b and an outlet side 174a, 174b coupled to one of the recirculation circuits.
- the outlet side 174a, 174b of each dispensing line 172a, 172b is coupled to the second recirculation circuit 20 in respective junction area 192a, 192b. More preferably, the outlet side 174a, 174b of each dispensing line 172a, 172b is coupled to the second recirculation pipe 23 close to terminal nozzle 23a.
- outlet sides 174a, 174b of the dispensing lines 172a, 172b may terminate at any other point of the second recirculation circuit 20 or at any point of other recirculation circuits.
- each dispensing line 172a, 172b preferably comprises a respective dispenser pump 175a, 175b which is properly controlled, activated and de-activated, during the washing cycle.
- the first dispenser pump 175a is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from the container 171a to the washing tub 3.
- the second dispenser pump 175b is activated during the washing cycle for transferring a quantity of softener S, or a dose of softener S, from the container 171b to the washing tub 3.
- the dispenser pumps may be located at any point of the respective dispensing line.
- the inlet side 173a, 173b of each dispensing line 172a, 172b is then advantageously fluidly connectable to the respective container 171a, 171b.
- the containers 171a, 171b and the second drawer 106b may assume an inserted working position (not shown) or an extracted position, as illustrated in all Figures 12 to 14 .
- the inlet side 173a, 173b of each dispensing line 172a, 172b and the respective container 171a, 171b are coupled through a connecting device.
- Each connecting device preferably comprises a male portion 178a, 178b which communicates with the dispenser pump 175a, 175b and a female portion 179a, 179b which communicates with the container 171a, 171b.
- the female portions 179a, 179b of the containers 171a, 171b are inserted in the male portions 178a, 178b when the containers 171a, 171b are in their closed working position.
- the male portions 178a, 178b preferably comprises valves, not illustrated, which are opened when the containers 171a, 171b are in closed working position and are automatically closed when the containers 171a, 171b and the second drawer 106b are moved towards the open position, so as to avoid detergent leakage.
- the second recirculation circuit 20 is activated.
- detergent D or softener S coming from the respective dispensing line 172a, 172b (from conduit 176a or conduit 176b) and liquid (for example water) flowing through the second recirculation pipe 23 are mixed together in the junction area 192a, 192b and hence homogenously sprayed over the laundry through the terminal nozzle 23a.
- the automatic dosing device 170 is separated from the single-use wash products dispenser 160.
- the automatic dosing device 170 may be conveniently arranged in suitable position in the cabinet 2 independently from the position of the single-use wash products dispenser 160.
- the automatic dosing device 170 does not need to be connected to the external supply line E.
- the automatic dosing device 170 may be conveniently arranged in suitable position in the cabinet 2 independently from the position of the external supply line E.
- Positioning of the automatic dosing device 170 in the design of the laundry washing machine 101 can be advantageously carried out to optimize and/or reduce the size of the laundry washing machine 101.
- the wash products dispenser 259 preferably comprises an automatic dosing device 270 for multiple doses of wash products.
- the automatic dosing device 270 here described and illustrated preferably comprises three containers 271a, 271b, 271c which may be filled with a large amount of wash product, for example detergent D, softener S and bleach B which are then dispensed in a predetermined dose during each washing cycle.
- the containers 271a, 271b, 271c are therefore filled with a quantity of detergent D, softener S and bleach B sufficient for several washing cycles.
- the containers 271a, 271b, 271c advantageously comprise each an inlet 290a, 290b, 290c with cover 291a, 291b, 291c for introduction of wash product by the user.
- containers 271a, 271b, 271c of the automatic dosing device 270 are slidably received in a housing located within the cabinet 2 and accessible from the top wall 2a of the cabinet 2.
- the containers 271a, 271b, 271c are preferably vertically inserted in the housing, or vertically removed from the housing.
- a lid 214 is preferably pivotally connected to the top wall 2a of the cabinet 2 to cover the containers 271a, 271b, 271c.
- the containers 271a, 271b, 271c are preferably removable containers, or cartridge. The user may easily remove the cartridges 271a, 271b, 271c to refill them with detergent D, softener S and bleach B or to replace them with others.
- the containers may be fixed to the casing 2.
- the containers 271a, 271b, 271c preferably have a substantially rectangular box-like shape. In different embodiments, the containers may have any shape and size that is receivable within the cabinet 2.
- the washing cycle may be carried out using the automatic dosing device 270.
- the washing cycle will use a dose of detergent D, softener S or bleach B supplied by the automatic dosing device 270. In this case, therefore, a single-use wash products dispenser is not necessary.
- the wash products dispenser 259 may also comprise a single-use wash products dispenser, for example arranged close to the automatic dosing device.
- the single-use wash products dispenser may comprise one or compartments suited to be filled with wash products which are suitable to be used in a single washing cycle.
- the automatic dosing device and the single-use wash products dispenser may both be used during a washing cycle.
- the automatic dosing device 270 preferably comprises three dispensing lines 272a, 272b, 272c suited to fluidly connecting the containers 271a, 271b, 271c to the washing tub 3 for conveying the wash products (detergent D, softener S and bleach B) from the containers 271a, 271b, 271c to the washing tub 3.
- the dispensing lines 272a, 272b, 272c advantageously comprise conduits 276a, 276b, 276c.
- each dispensing line 272a, 272b, 272c has an inlet side coupable to the container 271a, 2171b, 271c and an outlet side coupled to one of the recirculation circuits.
- each dispensing line 272a, 272b, 272c is coupled to the second recirculation circuit 20 in respective junction area 292a, 292b, 292c. More preferably, the outlet side of each dispensing line 272a, 272b, 272c is coupled to the second recirculation pipe 23 close to terminal nozzle 23a.
- outlet sides of the dispensing lines 272a, 272b, 272c may terminate at any other point of the second recirculation circuit 20 or at any point of others recirculation circuits.
- each dispensing line 272a, 272b, 272c preferably comprises a respective dispenser pump 275a, 275b, 275c which is properly controlled, activated and de-activated, during the washing cycle.
- the first dispenser pump 275a is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from the container 271a to the washing tub 3.
- the second dispenser pump 275b is activated during the washing cycle for transferring a quantity of softener S, or a dose of softener S, from the container 271b to the washing tub 3.
- the third dispenser pump 275c is activated during the washing cycle for transferring a quantity of bleach B, or a dose of bleach B, from the container 271c to the washing tub 3.
- the dispenser pumps may be located at any point of the respective dispensing line.
- each dispensing line 272a, 272b, 272c is then advantageously fluidly connectable to the respective container 271a, 271b, 271c.
- the inlet side of each dispensing line 272a, 272b, 272c and the respective container 271a, 271b, 271c are coupled through a connecting device.
- Each connecting device preferably comprises a male portion 278a, 278b, 278c which communicates with the dispenser pump 275a, 275b, 275c and a female portion 279a, 279b, 279c which communicates with the container 271a, 271b, 271c.
- the female portions 279a, 279b, 279c of the containers 271a, 271b, 271c are inserted in the male portions 278a, 278b, 278c when the containers 271a, 271b, 271c are in their inserted working position.
- the second recirculation circuit 20 is activated.
- detergent D, softener S or bleach B coming from the respective dispensing line 272a, 272b, 272c (conduits 276a, 276b, 276c) and liquid (for example water) flowing through the second recirculation pipe 23 are mixed together in the junction area 292a, 292b, 292c and hence homogenously sprayed over the laundry through the terminal nozzle 23a.
- Figure 18 shows a laundry washing machine 301 according to a further preferred embodiment of the invention.
- Laundry washing machine 301 differs from the laundry washing machine 201 previously described with reference to Figures 15 to 17 in that the wash products dispenser 359 comprises an automatic dosing device 370 which has two containers 371a, 371b, instead of three containers.
- the two containers 371a, 371b may be filled with a large amount of wash product, for example detergent D and/or softener S (or bleach B) which are then dispensed in a predetermined dose during each washing cycle.
- a large amount of wash product for example detergent D and/or softener S (or bleach B) which are then dispensed in a predetermined dose during each washing cycle.
- containers 371a, 371b are slidably received in a housing located within the cabinet 2 an accessible from the top wall 2a of the cabinet 2.
- the containers 371a, 371b are preferably vertically inserted in the housing, or vertically removed from the housing.
- Figure 19 shows a laundry washing machine 401 according to a further preferred embodiment of the invention.
- Laundry washing machine 401 differs from the laundry washing machine 301 previously described with reference to Figure 18 in that the two containers 471a, 471b of the automatic dosing device 470 of the wash products dispenser 459 are obtained in a single piece construction.
- the two containers 471a, 471b define a completed, integral, unitary member.
- Figure 20 shows a laundry washing machine 501 according to a further preferred embodiment of the invention.
- Laundry washing machine 501 differs from laundry washing machine 101 previously described with reference to Figure 12 in that the second drawer 106b does not contain any container for any wash products.
- the second drawer 106b may be suitable to receive any other type of items.
- the present invention allows all the set objects to be achieved.
- it makes it possible to provide an alternative system for supplying a dose of a wash product into the washing tub in a laundry washing machine equipped with an automatic dosing device.
- laundry washing machines illustrated in the enclosed figures are of the front-loading type; however it is clear that the system according to the invention can be applied as well to a top-loading washing machine, substantially without any modification.
- laundry washing machines illustrated in the enclosed figures preferably comprise two recirculation circuits; however the invention can be applied as well to laundry washing machine having only one recirculation circuit or also to laundry washing machine having more than two recirculation circuits.
- Reference to a recirculation circuit is meant to indicate a circuit realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid again into the washing tub.
- liquid may preferably be re-admitted in the same bottom region of the tub.
- liquid may preferably be re-admitted to an upper region of the tub.
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Abstract
Description
- The present invention concerns the field of laundry washing techniques.
- In particular, the present invention refers to a laundry washing machine equipped with an automatic dosing device for wash products.
- Nowadays the use of laundry washing machines, both "simple" laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
- In the present description the term "laundry washing machine" will refer to both simple laundry washing machines and laundry washing-drying machines.
- Laundry washing machines generally comprise an external casing, or cabinet, provided with a washing tub which contains a rotatable perforated drum where the laundry is placed. A loading/unloading door ensures access to the drum.
- Laundry washing machines typically comprise a water supply unit and a products supply unit for the introduction of water and washing/rinsing products (i.e. detergent, softener, rinse conditioner, etc.) into the tub.
- In laundry washing machines of known type the products supply unit may also be advantageously equipped with an automatic dosing device which is able to dose powder, liquid or other kinds of wash products from a container into the tub. In particular, the dosing device comprises one or more multidose containers, such as dispenser cartridges, which are filled with a large amount of a respective wash product that is then dispensed in a predetermined dose at any single washing cycle. Each multidose container is therefore advantageously filled with a quantity of wash product sufficient for several washing cycles.
- According to the dosing device of the known type the multidose container is part of a removable drawer which is slidably received in a housing located within the cabinet. The housing is conformed so as to define at its bottom a lower dispensing housing (flushing chamber). The lower dispensing housing advantageously underlies the multidose container/s when the drawer sits in a closed position.
- During a washing cycle when the wash product is required, a dose of wash product is conveyed from the multidose container into the lower dispensing housing, or flushing chamber. A proper flushing volume of water coming from an external water supply line is made flow through the flushing chamber and the water with the wash product then flow inside the tub.
- The laundry washing machines equipped with an automatic dosing device of the known art pose some drawbacks.
- A drawback posed by known automatic dosing devices lies in that they require a flushing chamber so that water may be provided to flush the wash products to the washing tub.
- This negatively affects size and/or manufacturing costs of the dosing device and hence size and/or manufacturing costs of the laundry washing machine.
- A further drawback posed by said automatic dosing devices lies in that they require complex water paths to convey water from the external water supply line to the flushing chamber and from there to the washing tub and also require complex wash products paths to convey wash products from the containers to the flushing chamber.
- The object of the present invention is therefore to overcome the drawbacks posed by the known techniques.
- It is an object of the invention to provide an alternative system for supplying a dose of a wash product into the washing tub in a laundry washing machine equipped with an automatic dosing device.
- It is another object of the invention to provide a laundry washing machine equipped with an automatic dosing device having reduced complexity and/or size compared to laundry washing machines of known type.
- The applicant has found that by providing a laundry washing machine comprising an automatic dosing device having at least one container suitable for receiving an amount of wash product sufficient for a plurality of washing cycles and having a recirculation circuit for transferring liquid from a first region of the washing tub and for re-admitting the liquid into a second region of the washing tub wherein the automatic dosing device comprises a dispensing line terminating at said recirculation circuit which allows to convey the wash product from the at least one container to the washing tub, it is possible to reduced the complexity and/or the size of the automatic dosing device and of the laundry washing machine compared to known system.
- The present invention relates, therefore, to a laundry washing machine comprising:
- a cabinet supporting a washing drum adapted to receive laundry and a washing tub external to said washing drum;
- a water supply unit suited to supply water into said washing tub;
- an automatic dosing device suited to supply at least one wash product into said washing tub, said automatic dosing device comprising at least one container suitable for receiving an amount of said at least one wash product sufficient for a plurality of washing cycles;
- a recirculation circuit for transferring liquid from a first region of said washing tub and for re-admitting said liquid into a second region of said washing tub;
- a control unit for controlling functioning of said laundry washing machine;
- an interface unit by means of which the user may select and/or set parameters;
- In a preferred embodiment of the invention, dispensing line comprises an inlet side connected to said at least one container and an outlet side connected to the recirculation circuit.
- Preferably, the dispensing line comprises a dispenser pump suitable for forcing said at least one wash product inside the dispensing line.
- More preferably, the automatic dosing device comprises a dispenser pump and wherein the dispensing line is fluidly connected between an outlet of the dispenser pump and the recirculation circuit.
- According to a preferred embodiment of the invention, said at least one container is a removable container.
- In a preferred embodiment of the invention, the inlet side of the dispensing line and said at least one container are coupable through a connecting device.
- Preferably, the connecting device preferably comprises a male portion communicating with the inlet side of the dispensing line or with the container and a female portion communicating with the container or with the inlet of the dispensing line.
- More preferably, the male portion and the female portion are removable connectable one to the other.
- According to a preferred embodiment of the invention, said at least one container is received in a drawer slidably coupled to the cabinet.
- Preferably, said at least one container is received in a drawer slidably coupled to the cabinet and wherein the connecting device preferably comprises a male portion communicating with the inlet side of the dispensing line or with the container and a female portion communicating with the container or with the inlet of the dispensing line, the male portion being connected to the female portion when the drawer is in its inserted position and the male portion being disconnected from the female portion when the drawer is in its extracted position. In a preferred embodiment of the invention, the drawer comprises the interface unit.
- According to a preferred embodiment of the invention, said at least one container is slidably arranged in the upper side of the cabinet so as to be accessible from the upper side of the cabinet.
- Preferably, said at least one container is accessible from a top wall of the cabinet. Preferably, the recirculation circuit comprises a recirculation pump suitable for forcing liquid inside the recirculation circuit. The recirculation circuit preferably comprises a first pipe fluidly connecting the washing tub to the recirculation pump. The recirculation circuit then preferably comprises a second pipe fluidly connecting the recirculation pump to the washing tub.
- In a preferred embodiment of the invention, the dispensing line terminates at the first pipe or at the second pipe of the recirculation circuit.
- In a further preferred embodiment of the invention, the dispensing line terminates close to a terminal nozzle of the second pipe.
- Preferably, the first region is a bottom region of the washing tub.
- Preferably, the second region is a bottom region of the washing tub or an upper region of the washing tub.
- According to a preferred embodiment of the invention, the method further comprises a single-use wash products dispenser comprising at least one compartment suitable for receiving a dose of said at least one wash product at the beginning of each single washing cycle and the dose is then completely used in the single washing cycle.
- In a preferred embodiment of the invention, said at least one compartment of the products dispenser and said at least one container of the automatic dosing device are part of a drawer slidably received in the cabinet.
- Preferably, the drawer is slidablyreceived in a drawer housing located within the cabinet.
- According to a preferred embodiment of the invention, the drawer housing is suitable to receive said at least one wash product from said at least one container of the automatic dosing device and the drawer housing is fluidly connected to the washing tub.
- In a first preferred embodiment of the invention, the recirculation circuit comprises a first circuit adapted to drain liquid from a bottom region of the washing tub and to re-admit such a liquid into the bottom region of the washing tub and wherein the dispensing line terminates at any point of the first recirculation circuit.
- In a second preferred embodiment of the invention, the recirculation circuit comprises a second circuit adapted to drain liquid from a bottom region of the washing tub and to re-admit such a liquid into an upper region of the washing tub and wherein the dispensing line terminates at any point of the second recirculation circuit.
- In a further aspect thereof, the present invention concerns a method for operating a laundry washing machine according to any of the preceding claims, wherein the method comprises a step of activating said dispensing line for conveying said at least one wash product from said at least one container to said washing tub and a step of activating said recirculation circuit for transferring liquid from said first region of said washing tub and for re-admitting said liquid into said second region of said washing tub.
- Preferably, the step of activating the dispensing line comprises a step of activating a dispenser pump of said dispensing line.
- Preferably, the step of activating the recirculation circuit comprises a step of activating a recirculation pump of said recirculation circuit.
- Further characteristics and advantages of the present invention will be highlighted in greater detail in the following detailed description of preferred embodiments of the invention, provided with reference to the enclosed drawings. In the drawings, corresponding characteristics and/or components are identified by the same reference numbers. In such drawings:
-
Figure 1 shows a perspective view of a laundry washing machine according to a first embodiment of the invention; -
Figure 2 shows a partially exploded view of the laundry washing machine ofFigure 1 from another point of view; -
Figure 3 shows a schematic view of the laundry washing machine ofFigure 1 ; -
Figure 4 shows the laundry washing machine ofFigure 1 with the external casing removed; -
Figure 5 shows the laundry washing machine ofFigure 4 from another point of view; -
Figure 6 shows a partial view of the laundry washing machine ofFigure 1 with the external casing partially removed; -
Figure 7 is a plan view of some components of the laundry washing machine ofFigure 4 isolated from the rest; -
Figure 8 shows the laundry washing machine ofFigure 1 with the external casing removed with the drawer in its closed position; -
Figure 8A shows an enlarged view of a detail ofFigure 8 ; -
Figure 9 represents a top plan view ofFigure 8 ; -
Figure 10 shows the laundry washing machine ofFigure 1 with the external casing removed and with the drawer in its open position; -
Figure 10A shows an enlarged view of a detail ofFigure 10 ; -
Figure 11 represents a top plan view ofFigure 10 ; -
Figure 12 shows a perspective view of a laundry washing machine according to a second embodiment of the invention and with the second drawer in its open position; -
Figure 13 shows the laundry washing machine ofFigure 12 with the top side removed and from another point of view; -
Figure 14 shows the laundry washing machine ofFigure 13 with the first drawer removed; -
Figure 15 shows a perspective view of a laundry washing machine according to a third embodiment of the invention; -
Figure 13 shows the laundry washing machine ofFigure 12 with the top side removed and from another point of view; -
Figure 14 shows the laundry washing machine ofFigure 13 with the first drawer removed; -
Figure 15 shows a perspective view of a laundry washing machine according to a third embodiment of the invention; -
Figure 16 shows a partially exploded view of the laundry washing machine ofFigure 15 ; -
Figure 17 shows the laundry washing machine ofFigure 16 with the top side removed and from another point of view; -
Figures 18 to 20 show perspective views of laundry washing machines according to further embodiments of the invention; -
Figure 21 schematically shows further preferred embodiments of the invention. - The present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to laundry washing machines. On the contrary, the present invention can be conveniently applied to laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
- In the present description, therefore, the term "laundry washing machine" will refer to both simple laundry washing machines and laundry washing-drying machines.
- With reference to Figures from 1 to 11 a
laundry washing machine 1 according to a preferred embodiment of the invention is described. - The
laundry washing machine 1 comprises an external casing orcabinet 2, in which awashing tub 3 is provided that contains aperforated washing drum 4 where the laundry to be treated can be loaded. - The
tub 3 and thedrum 4 both preferably have a substantially cylindrical shape. Between thetub 3 and the drum 4 agap 55 is defined. - The
cabinet 2 is provided with a loading/unloading door 8 which allows access to thedrum 4. - The
tub 3 is preferably suspended in a floating manner inside thecabinet 2, advantageously by means of a number of coil springs and shock-absorbers 9. - The
drum 4 is advantageously rotated by an electric motor, not illustrated, which preferably transmits the rotating motion to the shaft of thedrum 4, advantageously by means of a belt/pulley system. In a different embodiment of the invention, the motor can be directly associated with the shaft of thedrum 4. - The
drum 4 is advantageously provided with holes which allow the liquid flowing therethrough. Said holes are typically and preferably homogeneously distributed on the cylindrical side wall of thedrum 4. - The
tub 3 is preferably connected to thecabinet 2 by means of anelastic bellows 7, or gasket. - The
tub 3 preferably comprises two complementary hemi-shells tub 3. -
Laundry washing machine 1 advantageously comprises acontrol unit 11 connected to the various parts of thelaundry washing machine 1 in order to ensure its operation.Laundry washing machine 1 preferably comprises an interface unit 16 (control panel), connected to thecontrol unit 11, accessible to the user and by means of which the user may select and set the washing parameters, like for example a desired washing program. Usually, other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, etc.. - The
bottom region 3a of thetub 3 preferably comprises aseat 15, or sump, suitable for receiving aheating device 10, as illustrated inFigure 6 . Theheating device 10, when activated, heats the liquid inside thesump 15. - The
heating device 10 preferably comprises an electrical resistor of serpentine type. Theheating device 10 is horizontally placed in thesump 15 and it extends substantially from a front part up to a rear part of thesump 15. - In different embodiments, nevertheless, the bottom region of the tub may be configured differently. For example, the bottom region of the tub may not comprise a seat for the heating device. The heating device may be advantageously placed in the annular gap between the tub and the drum.
- In further embodiments, then, the heating device may not be present. The required heated water may come from an external hot water source.
- In further embodiments the heating device may be different and suitable to heat the liquid in the tub, for example a hot air stream, a steam flow, microwaves source, infra-red rays, etc..
-
Laundry washing machine 1 advantageously comprises awater outlet circuit 25 suitable for withdrawing liquid from thebottom region 3a of thetub 3. - The
water outlet circuit 25 preferably comprises amain pipe 17, a drainingpump 26 and anoutlet pipe 28 ending outside thecabinet 2. - The
water outlet circuit 25 preferably further comprise afiltering device 12 arranged between themain pipe 17 and the drainingpump 26. Thefiltering device 12 is adapted to retain all the undesirable bodies (for example buttons that have come off the laundry, coins erroneously introduced into the laundry washing machine, etc.). - This
filtering device 12 can preferably be removed, and then cleaned, through agate 14 placed advantageously on the front wall of thecabinet 2 of thelaundry washing machine 1, as illustrated inFigures 1 and 2 . - The
main pipe 17 connects thebottom region 3a of thetub 3 to thefiltering device 12. Aninlet end 17a of themain pipe 17 is advantageously positioned at the lower point of thetub 3, more preferably at the lower point of thesump 15, as illustrated inFigure 7 . - An
outlet end 17b of themain pipe 17 is connected to afront part 12a of thefiltering device 12. - In a further embodiment, not illustrated, the
filtering device 12 may be provided directly in thetub 3, preferably obtained in a single piece construction with the latter. In this case thefiltering device 12 is fluidly connected to the outlet of thetub 3, in such a way that water or washing liquid drained from thetub 3 enters thefiltering device 12. - The draining
pump 26 is preferably connected to arear part 12b of thefiltering device 12 and conveys the liquid to theoutlet pipe 28 through anoutlet 29, the latest better visible inFigure 6 where theoutlet pipe 28 has been removed. - Activation of the
drain pump 26 drains the liquid, for example dirty water or water mixed with washing and/or rinsing products, from thetub 3 to the outside. -
Laundry washing machine 1 advantageously comprises afirst recirculation circuit 30, or mixingcircuit 30. The mixingcircuit 30 is adapted to drain liquid from thebottom region 3a of thetub 3 and to re-admit such a liquid (recirculated mixing liquid) into a first region of thetub 3, which corresponds substantially to the samebottom region 3a of thetub 3. - Preferably, the mixing
circuit 30 is adapted to drain liquid from the bottom of thesump 15 and to re-admit such a liquid again into thesump 15. More preferably, the liquid is re-admitted again into thesump 15 below theheating device 10. - The mixing
circuit 30 preferably comprises afirst recirculation pump 31, afirst recirculation pipe 32 connecting thefiltering device 12 to thefirst recirculation pump 31 and asecond recirculation pipe 33 connecting thefirst recirculation pump 31 to thebottom region 3a of thetub 3. Thesecond recirculation pipe 33 is advantageously provided with aterminal portion 34, or nozzle, better visible inFigure 6 . Theterminal portion 34 advantageously ends inside thesump 15, as mentioned above. - The liquid from the
bottom region 3a of thetub 3 is conveyed again towards thebottom region 3a of thetub 3 by activation of thefirst recirculation pump 31. - Advantageously, the liquid from the
bottom region 3a of thetub 3 is conveyed towards thebottom region 3a of thetub 3 in thegap 55 between thetub 3 and thedrum 4. - In a further embodiment, not illustrated, the mixing circuit may comprise a dedicated pipe connecting the bottom region of the tub to the recirculation pump; in this case the mixing circuit is advantageously completely separated from the water outlet circuit, i.e. completely separated from the
filtering device 12 and themain pipe 17. - The mixing circuit is preferably realized for transferring a portion of a liquid from a bottom region of the tub to the same bottom region for mixing and/or dissolving the products.
- In general, the mixing circuit is preferably realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid into the washing tub such that at least a portion of the re-admitted liquid reaches the bottom region of the washing tub without entering the washing drum.
- More preferably, the mixing circuit is realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid into the washing tub such that all, or substantially all, the re-admitted liquid reaches the bottom region of the washing tub without entering the washing drum.
-
Laundry washing machine 1 preferably comprises asecond recirculation circuit 20 adapted to drain liquid from thebottom region 3a of thetub 3 and to re-admit such a liquid into asecond region 3b, or upper region, of thetub 3. - The
second recirculation circuit 20 preferably comprises asecond recirculation pump 21, afirst recirculation pipe 22 connecting thefiltering device 12 to thesecond recirculation pump 21 and asecond recirculation pipe 23 connecting thesecond recirculation pump 21 to theupper region 3b of thetub 3. Thesecond recirculation pipe 23 is preferably provided with aterminal nozzle 23a arranged preferably at theupper region 3b of thetub 3. Theterminal nozzle 23a is opportunely arranged so that the liquid is sprayed into theperforated drum 4. - More preferably the
terminal nozzle 23a is integrally formed in thebellows 7, as visible inFigure 4 , and the liquid is therefore advantageously sprayed in a direction against theperforated drum 4. - The liquid from the
bottom region 3a of thetub 3 is conveyed towards theupper region 3b of thetub 3 by activation of thesecond recirculation pump 21. - The
second recirculation circuit 20 is advantageously activated in order to improve wetting of the laundry inside thedrum 4 and for reducing the water required in the whole washing cycle. - In general, the second recirculation circuit is properly realized for transferring a portion of a liquid from a bottom region of the tub, preferably from the sump, to an upper region of the tub in order to enhance absorption of the liquid by the laundry.
- Advantageously,
laundry washing machine 1 comprises adevice 19 suited to sense (or detect) the liquid level inside thetub 3. - The
sensor device 19 preferably comprises a pressure sensor which senses the pressure in thetub 3. From the values sensed by thesensor device 19 it is possible to determine the liquid level of the liquid inside thetub 3. In another embodiment, not illustrated, laundry washing machine may preferably comprise (in addition to or as a replacement of the pressure sensor) a level sensor (for example mechanical, electro-mechanical, optical, etc.) adapted to sense (or detect) the liquid level inside thetub 3. - The
laundry washing machine 1 advantageously comprises a wash products dispenser 59 to supply wash products into thetub 3 during a washing cycle. Wash products may comprise, for example, detergent, rinse additives, fabric softener or fabric conditioners, waterproofing agents, fabric enhancers, rinse sanitization additives, chlorine-based additives, etc.. - In the preferred embodiment here illustrated and described, the wash products dispenser 59 preferably comprises a single-use
wash products dispenser 60 and anautomatic dosing device 70 for multiple doses of wash products. - In the preferred embodiment here described and illustrated, the single-use
wash products dispenser 60 comprises threecompartments - In different embodiments, nevertheless, the single-use wash products dispenser may comprise further compartments suited to be filled with other type of wash products which are suitable to be used in the washing cycle.
-
Compartments wash products dispenser 60 are filled with the respective wash product at the beginning of each washing cycle. - The
automatic dosing device 70 here described and illustrated comprises amain container 71 which may be filled with a large amount of wash product, in particular detergent D, which is then dispensed in a predetermined dose during each washing cycle. Themain container 71 is therefore filled with a quantity of detergent D sufficient for several washing cycles. Themain container 71 advantageously comprises aninlet 90 withcover 91 for introduction of detergent D by the user. - In the preferred embodiment here described and illustrated, the
compartments wash products dispenser 60 and themain container 71 of theautomatic dosing device 70 are part of adrawer 6 slidably received in adrawer housing 40 located within thecabinet 2. - The
compartments - The
main container 71 is preferably aremovable container 71, or cartridge, as illustrated in particular inFigure 2 . The user may easily remove thecartridge 71 to refill it with detergent D or to replace it with another. - In different embodiments, nevertheless, the main container may be fixed to the drawer.
- The
main container 71 preferably has a substantially rectangular box-like shape which is capable of being received within thedrawer 6. - In different embodiments, the main container may have any shape and size that is receivable within the drawer. The container may be flexible, rigid, expandable, or collapsible and may be made of any type of material.
- Further features of the
automatic dosing device 70 will be described later throughout the description. - In the preferred embodiment here illustrated and described, as said above, the
wash products dispenser 59 comprises both a single-usewash products dispenser 60 and anautomatic dosing device 70 for multiple doses of wash products. - In a preferred embodiment of the invention, the washing cycle may be carried out using only the
automatic dosing device 70. In this case, for example, the washing cycle will use a dose of detergent D supplied by theautomatic dosing device 70. In this case, therefore, the use of the single-usewash products dispenser 60 will be neglected. - In another preferred embodiment of the invention, the washing cycle may be carried out using only the single-use
wash products dispenser 60. In this case, for example, the washing cycle can use a dose of detergent D and/or a dose of softener S and/or a dose of bleach B supplied by thewash products dispenser 60. In this case, therefore, the use of theautomatic dosing device 70 will be neglected. - In a further preferred embodiment of the invention, the washing cycle may be carried out using both the single-use
wash products dispenser 60 and theautomatic dosing device 70. In this case, for example, the washing cycle can use a dose of detergent D supplied by theautomatic dosing device 70 and a dose of softener S and/or a dose of bleach B supplied by thewash products dispenser 60. The choice of the desired washing cycle between the different mentioned washing cycles, i.e. the use of both the single-use wash products dispenser and the automatic dosing device or the use of only one of them, may be preferably carried automatically by the laundry washing machine which may sense the presence of wash products in the respective compartments or containers. - The laundry washing machine may sense the presence of wash products in the respective compartments or containers through suitable sensors preferably arranged at said compartments and/or containers. The sensor may be, for example, a conductivity sensor.
- Alternatively, the choice of the desired washing cycle may be preferably directly inputted by the user through the
interface unit 16. - The
drawer housing 40, which receives thedrawer 6 in its closed position, preferably has a slopedbottom wall 41 and anoutlet 42 located at the rear of the slopedbottom wall 41. Theoutlet 42 communicates with asupply pipe 18 connected to thetub 3. - The
supply pipe 18, as schematically illustrated inFigure 3 and visible inFigures 5 and9 , is preferably arranged laterally with respect to thetub 3 and preferably terminates at anupper region 3b of thetub 3. More preferably, thesupply pipe 18 terminates at a rear side of thetub 3. - A
water supply unit 5 is arranged in the upper part of thelaundry washing machine 1 and is suited to supply water from an external supply line E. Thewater supply unit 5 advantageously comprises two controlledsupply valve conduits products dispenser 60 towards thecompartments Figure 8A . Thesupply valve compartments products dispenser 60. - Water is thus provided to one of the
compartments respective compartment tub 3 through thedrawer housing 40, theoutlet 42 and thesupply pipe 18. - The
water supply unit 5 also preferably comprises a water flow sensor (not shown), for example a flow meter, which makes it possible to calculate the quantity of water supplied from the external supply line E. - According to an aspect of the invention, the
automatic dosing device 70 preferably comprises a dispensingline 72 suited to fluidly connecting thecontainer 71 to thewashing tub 3 for conveying the wash product (detergent D) from thecontainer 71 to thewashing tub 3. The dispensingline 72 advantageously comprises aconduit 76. - According to a preferred aspect of the invention, the dispensing
line 72 has aninlet side 73 coupable to thecontainer 71 and anoutlet side 74 coupled to one of the recirculation circuits. - In the preferred embodiment here illustrated and described, the
outlet side 74 of the dispensingline 72 is coupled to thesecond recirculation circuit 20 in ajunction area 92. More preferably, theoutlet side 74 of the dispensingline 72 is coupled to thesecond recirculation pipe 23 close toterminal nozzle 23a. - In different embodiments, as schematically illustrated in
Figure 21 , the outlet side of the dispensingline 72 may terminate at any other point of thesecond recirculation circuit 20, for example at any point of the second recirculation pipe 23 (seejunction area 92a) or at any point of the first recirculation pipe 22 (seejunction area 92b). In different embodiments, theoutlet side 74 of the dispensingline 72 may terminate at any other point of thefirst recirculation circuit 30, for example at any point of the second recirculation pipe 33 (seejunction area 92c) or at any point of the first recirculation pipe 32 (seejunction area 92d). - The
inlet side 73 of the dispensingline 72 preferably comprises adispenser pump 75 which is properly controlled, activated and de-activated, during the washing cycle. - In particular, the
dispenser pump 75 is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from thecontainer 71 to thewashing tub 3. - In different embodiments, the dispenser pump may be located at any point of the dispensing line.
- The
inlet side 73 of the dispensingline 72 is then advantageously fluidly connectable to thecontainer 71. In the preferred embodiment here illustrated and described, thecontainer 71 and thedrawer 6 may assume an inserted working position, as illustrated for example inFigures 8, 8A and 9 , or an extracted position, as illustrated for example inFigures 10, 10A and 11 . At this purpose, theinlet side 73 of the dispensingline 72 and thecontainer 71 are coupled through a connectingdevice 77. The connectingdevice 77 preferably comprises amale portion 78 which communicates with thedispenser pump 75 and afemale portion 79 which communicates with thecontainer 71. Thefemale portion 79 of thecontainer 71 is inserted in themale portion 78 when thecontainer 71 is in its closed working position (as illustrated inFigure 8A ). - The
male portion 78 preferably comprises a valve, not illustrated, which is opened when thecontainer 71 is in its closed working position and is automatically closed when thecontainer 71 and thedrawer 6 are moved towards the open position, so as to avoid detergent leakage. - Alternatively, the male portion may communicate with the container dispenser and the female portion may communicate with the dispenser pump
- It is clear that in different embodiments, the connecting device may be differently realized.
- From the above it follows that if the
drawer 6 is in its inserted working position thecontainer 71 if fluidly connected to the dispensingline 72 and if thedrawer 6 is in its extracted position thecontainer 71 if fluidly disconnected from the dispensingline 72. - As said above, the
dispenser pump 75 is opportunely activated during the washing cycle for transferring a dose of detergent D to thewashing tub 3. - In a preferred embodiment of the invention, then, during the washing cycle together with the activation of the
dispenser pump 75 also thesecond recirculation circuit 20 is activated. Thesecond recirculation circuit 20 is activated when liquid, in particular water, is present at thebottom region 3a of thetub 3. Advantageously, detergent D coming from the dispensing line 72 (from the conduit 76) and liquid (for example water) flowing through thesecond recirculation pipe 23 are mixed together in thejunction area 92 and hence homogenously sprayed over the laundry through theterminal nozzle 23a. - According to the preferred aspect of the present invention, by providing the
automatic dosing device 70 with adedicated dispensing line 72 for conveying the wash product (detergent D) from thecontainer 71 to thewashing tub 3 it is not necessary to provide a flushing chamber where the wash product (detergent D) is conveyed and where water is provided to flush the wash product to the washing tub. - The complexity and size of the automatic dosing device are therefore reduced with respect to the system of the know technique.
- Also, the reduced complexity and size of the automatic dosing device gives freedom to place the dosing device in a favourable position of the cabinet, as will become apparent from the description of other embodiments throughout the description.
- Furthermore, according to another preferred aspect of the present invention, the provision of the
automatic dosing device 70 with adedicated dispensing line 72 terminating at a recirculation circuit allows mixing of the detergent with liquid flowing in the recirculation circuit and thus allows dilution of the detergent before it reaches the laundry. Advantageously, it is avoided that detergent D causes stains or halos on the laundry, as it may happen if detergent D is directly put on laundry. - Advantageously, therefore, the provision of the
automatic dosing device 70 with adedicated dispensing line 72 terminating at a recirculation circuit enhances a good dissolution of the detergent D in the water before it reaches the laundry. - In the preferred embodiment here illustrated and described, the
wash products dispenser 59 comprises both the single-usewash products dispenser 60 and theautomatic dosing device 70 for multiple doses of wash products. - In a further preferred embodiment, nevertheless, the wash products dispenser may comprise only the automatic dosing device for multiple doses of wash products, while the single-use wash products dispenser may be absent.
- With reference to Figures from 12 to 14 a
laundry washing machine 101 according to a further preferred embodiment of the invention is described. - Characteristics and components of the
laundry washing machine 101 not visible in the Figures may be assumed to be the same as that previously described with reference toFigures 1 to 11 . - In the preferred embodiment here illustrated and described, the wash products dispenser 159 preferably comprises a single-use
wash products dispenser 160 and a separatedautomatic dosing device 170 for multiple doses of wash products. - The single-use wash products dispenser 160 may comprise one or compartments (not visible) suited to be filled with wash products which are suitable to be used in the washing cycle, for example detergent, fabric softener, bleach, etc..
- Preferably, compartments of the single-use wash products dispenser 160 are part of a
first drawer 106a slidably received in a housing located within thecabinet 2. Compartments of the single-use wash products dispenser 160 are filled with the respective wash product at the beginning of each washing cycle, as already explained above with reference to the first preferred embodiment. - The
automatic dosing device 170 here described and illustrated preferably comprises twocontainers containers container inlet cover - In the preferred embodiment here illustrated, the
containers automatic dosing device 170 are preferably part of asecond drawer 106b slidably received in a housing located within thecabinet 2. - The
containers removable containers cartridges - In different embodiments, nevertheless, the containers may be fixed to the
second drawer 106b. - The
containers second drawer 106b. - Furthermore, in the preferred embodiment here illustrated and described, the interface unit 16 (control panel) is arranged in a front side of the
second drawer 106b. - The
interface unit 16 preferably comprises a display which displays machine working conditions and/or then preferably comprises one or more selector devices which allow to select the appropriate wash program and/or to set other parameters. - For example, the selector devices may comprise a rotary knob, push buttons, capacitive switches, touch screen, etc.
- In a preferred embodiment of the invention, the washing cycle may be carried out using only the
automatic dosing device 170. In this case, for example, the washing cycle will use a dose of detergent D and of softener S supplied by theautomatic dosing device 170. In this case, therefore, the use of the single-use wash products dispenser 160 will be neglected. - In another preferred embodiment of the invention, the washing cycle may be carried out using only the single-use
wash products dispenser 160. In this case, for example, the washing cycle can use a dose of detergent D and/or a dose of softener S and/or a dose of bleach B supplied by thewash products dispenser 160. In this case, therefore, the use of theautomatic dosing device 170 will be neglected. - In a further preferred embodiment of the invention, the washing cycle may be carried out using both the single-use
wash products dispenser 160 and theautomatic dosing device 170. In this case, for example, the washing cycle can use a dose of detergent D and of softener S supplied by theautomatic dosing device 170 and a dose of bleach B supplied by thewash products dispenser 160. - The choice of the desired washing cycle between the different mentioned washing cycles, i.e. the use of both the single-use wash products dispenser and the automatic dosing device or the use of only one of them, may be preferably carried automatically by the laundry washing machine which may sense the presence of wash products in the respective compartments or containers.
- Alternatively, the choice of the desired washing cycle may be preferably directly inputted by the user through the
interface unit 16. - According to an aspect of the invention, the
automatic dosing device 170 preferably comprises two dispensinglines containers washing tub 3 for conveying the wash products (detergent D and softener S) from thecontainers washing tub 3. Thedispensing lines conduits - According to a preferred aspect of the invention, each dispensing
line inlet side container outlet side - In the preferred embodiment here illustrated and described, the
outlet side line second recirculation circuit 20 inrespective junction area outlet side line second recirculation pipe 23 close toterminal nozzle 23a. - In different embodiments, nevertheless, the
outlet sides dispensing lines second recirculation circuit 20 or at any point of other recirculation circuits. - The
inlet side line respective dispenser pump - In particular, the
first dispenser pump 175a is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from thecontainer 171a to thewashing tub 3. - Analogously, the
second dispenser pump 175b is activated during the washing cycle for transferring a quantity of softener S, or a dose of softener S, from thecontainer 171b to thewashing tub 3. - In different embodiments, the dispenser pumps may be located at any point of the respective dispensing line.
- The
inlet side line respective container containers second drawer 106b may assume an inserted working position (not shown) or an extracted position, as illustrated in allFigures 12 to 14 . At this purpose, theinlet side line respective container male portion dispenser pump female portion container female portions containers male portions containers - The
male portions containers containers second drawer 106b are moved towards the open position, so as to avoid detergent leakage. - From the above it follows that if the
drawer 106b is in its inserted working position thecontainers respective dispensing lines drawer 106b is in its extracted position thecontainers respective dispensing lines - In a preferred embodiment of the invention, then, during the washing cycle together with the activation of one of the
dispenser pumps second recirculation circuit 20 is activated. Advantageously, detergent D or softener S coming from therespective dispensing line conduit 176a orconduit 176b) and liquid (for example water) flowing through thesecond recirculation pipe 23 are mixed together in thejunction area terminal nozzle 23a. - The above-mentioned advantages are therefore achieved.
- Furthermore, as described above, the
automatic dosing device 170 is separated from the single-usewash products dispenser 160. Advantageously, theautomatic dosing device 170 may be conveniently arranged in suitable position in thecabinet 2 independently from the position of the single-usewash products dispenser 160. - Moreover, the
automatic dosing device 170 does not need to be connected to the external supply line E. Advantageously, theautomatic dosing device 170 may be conveniently arranged in suitable position in thecabinet 2 independently from the position of the external supply line E. - Positioning of the
automatic dosing device 170 in the design of thelaundry washing machine 101 can be advantageously carried out to optimize and/or reduce the size of thelaundry washing machine 101. - With reference to Figures from 15 to 17 a
laundry washing machine 201 according to a further preferred embodiment of the invention is described. - Characteristics and components of the
laundry washing machine 201 not visible in the Figures may be assumed to be the same as that previously described with reference toFigures 1 to 11 . - In the preferred embodiment here illustrated and described, the wash products dispenser 259 preferably comprises an
automatic dosing device 270 for multiple doses of wash products. - The
automatic dosing device 270 here described and illustrated preferably comprises threecontainers containers containers inlet cover - Preferably,
containers automatic dosing device 270 are slidably received in a housing located within thecabinet 2 and accessible from thetop wall 2a of thecabinet 2. - The
containers - A
lid 214 is preferably pivotally connected to thetop wall 2a of thecabinet 2 to cover thecontainers - The
containers cartridges - In different embodiments, nevertheless, the containers may be fixed to the
casing 2. - The
containers cabinet 2. - In the preferred embodiment of the invention, the washing cycle may be carried out using the
automatic dosing device 270. In this case, the washing cycle will use a dose of detergent D, softener S or bleach B supplied by theautomatic dosing device 270. In this case, therefore, a single-use wash products dispenser is not necessary. - In a further preferred embodiment of the laundry washing machine, the wash products dispenser 259 may also comprise a single-use wash products dispenser, for example arranged close to the automatic dosing device. The single-use wash products dispenser may comprise one or compartments suited to be filled with wash products which are suitable to be used in a single washing cycle. In this case, as already described in previous embodiments, the automatic dosing device and the single-use wash products dispenser may both be used during a washing cycle.
- According to an aspect of the invention, the
automatic dosing device 270 preferably comprises three dispensinglines containers washing tub 3 for conveying the wash products (detergent D, softener S and bleach B) from thecontainers washing tub 3. Thedispensing lines conduits - According to a preferred aspect of the invention, each dispensing
line container - In the preferred embodiment here illustrated and described, the outlet side of each dispensing
line second recirculation circuit 20 inrespective junction area line second recirculation pipe 23 close toterminal nozzle 23a. - In different embodiments, nevertheless, the outlet sides of the
dispensing lines second recirculation circuit 20 or at any point of others recirculation circuits. - The inlet side of each dispensing
line respective dispenser pump - In particular, the
first dispenser pump 275a is activated during the washing cycle for transferring a quantity of detergent D, or a dose of detergent D, from thecontainer 271a to thewashing tub 3. - Analogously, the
second dispenser pump 275b is activated during the washing cycle for transferring a quantity of softener S, or a dose of softener S, from thecontainer 271b to thewashing tub 3. - Analogously, the
third dispenser pump 275c is activated during the washing cycle for transferring a quantity of bleach B, or a dose of bleach B, from thecontainer 271c to thewashing tub 3. - In different embodiments, the dispenser pumps may be located at any point of the respective dispensing line.
- The inlet side of each dispensing
line respective container line respective container male portion dispenser pump female portion container female portions containers male portions containers - In a preferred embodiment of the invention, then, during the washing cycle together with the activation of one of the
dispenser pumps second recirculation circuit 20 is activated. Advantageously, detergent D, softener S or bleach B coming from therespective dispensing line conduits second recirculation pipe 23 are mixed together in thejunction area terminal nozzle 23a. The above-mentioned advantages are therefore achieved. - The above-mentioned advantages are therefore achieved.
-
Figure 18 shows alaundry washing machine 301 according to a further preferred embodiment of the invention. -
Laundry washing machine 301 differs from thelaundry washing machine 201 previously described with reference toFigures 15 to 17 in that the wash products dispenser 359 comprises anautomatic dosing device 370 which has twocontainers - The two
containers - Preferably,
containers cabinet 2 an accessible from thetop wall 2a of thecabinet 2. - The
containers -
Figure 19 shows alaundry washing machine 401 according to a further preferred embodiment of the invention. -
Laundry washing machine 401 differs from thelaundry washing machine 301 previously described with reference toFigure 18 in that the twocontainers automatic dosing device 470 of the wash products dispenser 459 are obtained in a single piece construction. The twocontainers -
Figure 20 shows alaundry washing machine 501 according to a further preferred embodiment of the invention. -
Laundry washing machine 501 differs fromlaundry washing machine 101 previously described with reference toFigure 12 in that thesecond drawer 106b does not contain any container for any wash products. Thesecond drawer 106b may be suitable to receive any other type of items. - It has thus been shown that the present invention allows all the set objects to be achieved. In particular, it makes it possible to provide an alternative system for supplying a dose of a wash product into the washing tub in a laundry washing machine equipped with an automatic dosing device.
- It is underlined that the laundry washing machines illustrated in the enclosed figures are of the front-loading type; however it is clear that the system according to the invention can be applied as well to a top-loading washing machine, substantially without any modification.
- Furthermore, the laundry washing machines illustrated in the enclosed figures preferably comprise two recirculation circuits; however the invention can be applied as well to laundry washing machine having only one recirculation circuit or also to laundry washing machine having more than two recirculation circuits.
- Reference to a recirculation circuit is meant to indicate a circuit realized for transferring liquid from a bottom region of the tub and for re-admitting such a liquid again into the washing tub.
- In a preferred embodiment, liquid may preferably be re-admitted in the same bottom region of the tub.
- In a further preferred embodiment, liquid may preferably be re-admitted to an upper region of the tub.
- While the present invention has been described with reference to the particular embodiments shown in the figures, it should be noted that the present invention is not limited to the specific embodiments illustrated and described herein; on the contrary, further variants of the embodiments described herein fall within the scope of the present invention, which is defined in the claims.
Claims (25)
- A laundry washing machine (1; 101; 201; 301; 401; 501) comprising:- a cabinet (2) supporting a washing drum (4) adapted to receive laundry and a washing tub (3) external to said washing drum (4);- a water supply unit (5) suited to supply water into said washing tub (3);- an automatic dosing device (70; 170; 270; 370; 470; 570) suited to supply at least one wash product (D, S, B) into said washing tub (3), said automatic dosing device (70; 170; 270; 370; 470; 570) comprising at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) suitable for receiving an amount of said at least one wash product (D, S, B) sufficient for a plurality of washing cycles;- a recirculation circuit (20; 30) for transferring liquid from a first region (3a) of said washing tub (3) and for re-admitting said liquid into a second region (3b) of said washing tub (3);- a control unit (11) for controlling functioning of said laundry washing machine (1; 101; 201; 301; 401; 501);- an interface unit (16) by means of which the user may select and/or set parameters;wherein said automatic dosing device (70; 170; 270; 370; 470; 570) comprises a dispensing line (72; 172a, 172b; 272a, 272b, 272c) fluidly connecting said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) to said washing tub (3) for conveying said at least one wash product (D, S, B) from said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) to said washing tub (3) and wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) terminates at said recirculation circuit (20; 30).
- A machine (1; 101; 201; 301; 401; 501) according to claim 1, wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) comprises an inlet side (73a; 173a, 173b) connected to said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) and an outlet side (74a; 174a, 174b) connected to said recirculation circuit.
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) comprises a dispenser pump (75; 175a, 175b; 275a, 275b, 275c) suitable for forcing said at least one wash product (D, S, B) inside said dispensing line (72; 172a, 172b; 272a, 272b, 272c).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) is a removable container.
- A machine (1; 101; 201; 301; 401; 501) according to any claims from 2 to 4, wherein said inlet side (73a; 173a, 173b) of said dispensing line (72; 172a, 172b; 272a, 272b, 272c) and said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) are coupable through a connecting device (77).
- A machine (1; 101; 201; 301; 401; 501) according to claim 5, wherein said connecting device (77) preferably comprises a male portion (78; 178a, 178b; 278a, 278b, 278c) communicating with said inlet side (73a; 173a, 173b) of said dispensing line (72; 172a, 172b; 272a, 272b, 272c) or with said container and a female portion (79; 179a, 179b; 279a, 279b, 279c) communicating with said container or with said inlet of said dispensing line (72; 172a, 172b; 272a, 272b, 272c).
- A machine (1; 101) according to any of the preceding claims, wherein said at least one container (71; 171a, 171b) is received in a drawer (6; 106b) slidably coupled to said cabinet (2).
- A machine (1; 101) according to claims 7 and 6, wherein said male portion (78; 178a, 178b; 278a, 278b, 278c) is connected to said female portion (79; 179a, 179b; 279a, 279b, 279c) when said drawer (6; 106b) is in its inserted position and the male portion (78; 178a, 178b; 278a, 278b, 278c) is disconnected from the female portion (79; 179a, 179b; 279a, 279b, 279c) when the drawer (6; 106b) is in its extracted position.
- A machine (101) according to any of the preceding claims, wherein said drawer (106b) comprises said interface unit (16).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) is slidably arranged in the upper side of said cabinet (2) so as to be accessible from the upper side of said cabinet (2).
- A machine (201, 301, 401; 501) according to any of the preceding claims, wherein said at least one container (271a, 271b, 271c; 371a, 371b; 471a, 471b) is accessible from a top wall (2a) of said cabinet (2).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said recirculation circuit (20, 30) comprises a recirculation pump (21, 31) suitable for forcing liquid inside said recirculation circuit (20, 30).
- A machine (1; 101; 201; 301; 401; 501) according to claim 12, wherein said recirculation circuit (20, 30) comprises a first pipe (22, 32) fluidly connecting said washing tub (3) to said recirculation pump (20, 30).
- A machine (1; 101; 201; 301; 401; 501) according to claim 12 or 13, wherein said recirculation circuit (20, 30) comprises a second pipe (23, 33) fluidly connecting said recirculation pump (21, 31) to said washing tub (3).
- A machine (1; 101; 201; 301; 401; 501) according to claim 13 or 14, wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) terminates at said first pipe (22, 32) or at said second pipe (23, 33) of said recirculation circuit (20, 30).
- A machine (1; 101; 201; 301; 401; 501) according to claim 14 or 15, wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) terminates close to a terminal nozzle (23a) of said second pipe (22).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said first region is a bottom region (3a) of said washing tub (3).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said second region is a bottom region (3a) of said washing tub (3) or an upper region (3b) of said washing tub (3).
- A machine (1; 101) according to any of the preceding claims, wherein it further comprises a single-use wash products dispenser (60; 160) comprising at least one compartment (61, 62, 63) suitable for receiving a dose of said at least one wash product (D, S, B) at the beginning of each single washing cycle and said dose is then completely used in said single washing cycle.
- A machine (1) according to claim 19, wherein said at least one compartment (61, 62, 63) of said products dispenser (60) and said at least one container (71) of said automatic dosing device (70) are part of a drawer (6) slidably received in said cabinet (2).
- A machine (1; 101; 201; 301; 401; 501) according to claim 19, wherein said drawer (6) is slidably received in a drawer housing (40) located within the cabinet (2).
- A machine (1; 101; 201; 301; 401; 501) according to claim 21, wherein said drawer housing (40) is suitable to receive said at least one wash product (D, S, B) from said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) of said automatic dosing device (70; 170; 270; 370; 470; 570) and said drawer housing (40) is fluidly connected to said washing tub (3).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said recirculation circuit (30) comprises a first circuit adapted to drain liquid from a bottom region (3a) of said washing tub (3) and to re-admit such a liquid into said bottom region (3a) of said washing tub (3) and wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) terminates at any point of said first recirculation circuit (30).
- A machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein said recirculation circuit (20) comprises a second circuit adapted to drain liquid from a bottom region (3a) of said washing tub (3) and to re-admit such a liquid into an upper region (3b) of said washing tub (3) and wherein said dispensing line (72; 172a, 172b; 272a, 272b, 272c) terminates at any point of said second recirculation circuit (30).
- A method for operating a laundry washing machine (1; 101; 201; 301; 401; 501) according to any of the preceding claims, wherein it comprises a step of activating said dispensing line (72; 172a, 172b; 272a, 272b, 272c) for conveying said at least one wash product (D) from said at least one container (71; 171a, 171b; 271a, 271b, 271c; 371a, 371b; 471a, 471b) to said washing tub (3) and a step of activating said recirculation circuit (20; 30) for transferring liquid from said first region (3a) of said washing tub (3) and for re-admitting said liquid into said second region (3a, 3b) of said washing tub (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18208824.5A EP3486365B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2014/079217 WO2016102013A1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
EP14825352.9A EP3237673B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
EP18208824.5A EP3486365B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
Related Parent Applications (3)
Application Number | Title | Priority Date | Filing Date |
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EP14825352.9A Division EP3237673B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
EP14825352.9A Division-Into EP3237673B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
PCT/EP2014/079217 Previously-Filed-Application WO2016102013A1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
Publications (2)
Publication Number | Publication Date |
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EP3486365A1 true EP3486365A1 (en) | 2019-05-22 |
EP3486365B1 EP3486365B1 (en) | 2020-09-09 |
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Family Applications (2)
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EP14825352.9A Active EP3237673B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
EP18208824.5A Active EP3486365B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP14825352.9A Active EP3237673B1 (en) | 2014-12-23 | 2014-12-23 | Laundry washing machine with an automatic dosing device |
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EP (2) | EP3237673B1 (en) |
WO (1) | WO2016102013A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3786340A1 (en) * | 2019-08-29 | 2021-03-03 | LG Electronics Inc. | Drawer and clothes treating machine including the same |
EP3936655A1 (en) * | 2020-07-10 | 2022-01-12 | Electrolux Appliances Aktiebolag | A laundry washing machine comprising a sump of a tub with a recirculation circuit and a level sensor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD787763S1 (en) * | 2015-07-02 | 2017-05-23 | Samsung Electronics Co., Ltd. | Washing machine |
TR201714957A2 (en) * | 2017-10-04 | 2019-04-22 | Arcelik As | A DETERGENT DOSING SYSTEM AND A DETERGENT SAVING METHOD FOR WASHING MACHINES |
US10815605B2 (en) * | 2017-10-06 | 2020-10-27 | Whirlpool Corporation | Laundry treating appliance having a bulk dispensing assembly |
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EP0597509A1 (en) * | 1992-11-09 | 1994-05-18 | CANDY S.p.A. | A dynamic flow washing machine |
CH704603A2 (en) * | 2012-06-22 | 2012-07-31 | V Zug Ag | Washing machine comprises a controller, a tub, a detergent supply with chambers for receiving a detergent, a fresh water supply, a first nozzle connected with the supply line for flushing the first chamber with water, and a second nozzle |
EP2503044A1 (en) * | 2011-03-24 | 2012-09-26 | Electrolux Home Products Corporation N.V. | A method for performing a washing cycle of sensitive laundry in a washing machine or in a washer-dryer |
-
2014
- 2014-12-23 WO PCT/EP2014/079217 patent/WO2016102013A1/en active Application Filing
- 2014-12-23 EP EP14825352.9A patent/EP3237673B1/en active Active
- 2014-12-23 EP EP18208824.5A patent/EP3486365B1/en active Active
Patent Citations (3)
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EP0597509A1 (en) * | 1992-11-09 | 1994-05-18 | CANDY S.p.A. | A dynamic flow washing machine |
EP2503044A1 (en) * | 2011-03-24 | 2012-09-26 | Electrolux Home Products Corporation N.V. | A method for performing a washing cycle of sensitive laundry in a washing machine or in a washer-dryer |
CH704603A2 (en) * | 2012-06-22 | 2012-07-31 | V Zug Ag | Washing machine comprises a controller, a tub, a detergent supply with chambers for receiving a detergent, a fresh water supply, a first nozzle connected with the supply line for flushing the first chamber with water, and a second nozzle |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3786340A1 (en) * | 2019-08-29 | 2021-03-03 | LG Electronics Inc. | Drawer and clothes treating machine including the same |
CN112442861A (en) * | 2019-08-29 | 2021-03-05 | Lg电子株式会社 | Drawer and laundry treating machine including the same |
US11739468B2 (en) | 2019-08-29 | 2023-08-29 | Lg Electronics Inc. | Drawer and clothes treating machine including the same |
CN112442861B (en) * | 2019-08-29 | 2023-10-17 | Lg电子株式会社 | Drawer and laundry machine including the same |
EP3936655A1 (en) * | 2020-07-10 | 2022-01-12 | Electrolux Appliances Aktiebolag | A laundry washing machine comprising a sump of a tub with a recirculation circuit and a level sensor |
US11530507B2 (en) | 2020-07-10 | 2022-12-20 | Electrolux Appliances Aktiebolag | Laundry washing machine |
Also Published As
Publication number | Publication date |
---|---|
EP3486365B1 (en) | 2020-09-09 |
WO2016102013A1 (en) | 2016-06-30 |
EP3237673B1 (en) | 2019-02-20 |
EP3237673A1 (en) | 2017-11-01 |
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