EP2196573B1

EP2196573B1 - Household appliance with surface for steam treating laundry

Info

Publication number: EP2196573B1
Application number: EP20080171494
Authority: EP
Inventors: Daniele Da Riol; Michele Bisaro; Fabio Pasut
Original assignee: Electrolux Home Products Corp NV
Current assignee: Electrolux Home Products Corp NV
Priority date: 2008-12-12
Filing date: 2008-12-12
Publication date: 2013-04-24
Anticipated expiration: 2028-12-12
Also published as: WO2010066426A1; EP2196573A1

Description

The present invention relates in general to the field of household appliances, and in particular to a household appliance for washing and/or drying clothes.
Garments made of delicate textile materials, such as cashmere, are not adapted to undergo regular drying treatments in a tumble dryer, owing to the mechanical stresses, mainly in the form of impacts, which the textile fibres would be subject to. For properly taking care of these delicate textiles, more gentle drying treatments are required, such as line drying or flat drying, which on the other hand are rather time-consuming processes, especially in wintertime.
Solutions effective in eliminating the above mentioned drawbacks are disclosed in the European patent applications No. EP 1845185 and No. EP 1854916 , both in the name of the present applicant, which provide for household appliances that comprise an outer casing with a worktop defining a drying surface, featuring a plurality of apertures, each one of which is fluidly connected with conveying means adapted to deliver a flow of air towards and through said apertures for the purpose of drying garments that are laid upon the drying surface.
US 20088/0531163 discloses a multiple laundry treating machine having an auxiliary laundry treating space that is capable of performing a drying operation and a refreshing operation using an auxiliary space serving as a base is disclosed. The multiple laundry treating machine includes a laundry treating machine including a main laundry treating unit for performing various laundry treating operations bv the rotation of a drum and an auxiliary laundry treating unit, separated from the main laundry treating unit, for performing a laundry treating operation using circulating air or steam, and a monitor device for remotely controlling and monitoring the operation of the main laundry treating unit and the auxiliary laundry treating unit through a data communication with the laundry treating machine.
According to embodiments thereof, the present invention proposes an improvement to the solutions set forth in the cited European patent applications.
According to an aspect of the present invention, there is provided a household appliance comprising a cabinet provided with a worktop defining a surface adapted to support thereon clothes to be treated. A steam generation unit is provided, operable to generate steam, and a steam delivery system is fluidly connected to the steam generation unit and adapted to deliver steam to said surface.
Said surface has a plurality of apertures. Said steam delivery system is fluidly connected to and adapted to deliver steam through at least some apertures of said plurality of apertures.
An air passage is provided underneath the surface, and said steam delivery system is arranged to deliver steam into said air passage.
The steam delivery system may comprises at least one steam delivery nozzle.
In embodiments of the present invention, the said steam delivery system may comprise a plurality of steam delivery nozzles, each one arranged to deliver steam directly to a respective one of said apertures.
In further embodiments of the present invention, the steam delivery system may comprises a handheld steam delivery tool fluidly connectable or connected to a steam delivery outlet provided on the appliance cabinet and adapted to deliver steam generated by the steam generation unit.
The steam generation unit may be a steam generation unit provided in said cabinet for generating steam to be supplied to a clothes loading drum of the household appliance.
The apertures in the worktop surface may be in fluid communication with an air conveying system adapted to deliver a flow of air through said apertures, so as to gently drying garments or clothes laid on the worktop surface.
The air conveying system may comprises at least one heater operable to heat the flow of air to be delivered through said apertures.
Thanks to the proposed solution, clothes and garments can be laid on the worktop of the household appliance and be subjected to a steam flux, so as for example to prepare them for subsequent ironing, or simply to refresh them.
These and other features and advantages of the present invention will be made apparent by the following detailed description of exemplary and non-limitative embodiments thereof, to be read in conjunction with the attached drawings, wherein:

Figure 1 is a perspective view of a household appliance wherein a solution according to an embodiment of the present invention can be advantageously implemented;
Figure 2 is a partial side cross-sectional view of the household appliance of Figure 1 , showing an embodiment of the present invention;
Figure 3 is a partial side cross-sectional view of the household appliance of Figure 1 , showing another embodiment of the present invention;
Figure 4 shows another embodiment of the present invention, and
Figure 5 shows still another embodiment of the present invention.

In Figure 1 , there is shown a household appliance 100, in particular a household appliance for washing (e.g., a domestic washing machine) and/or drying clothes (e.g. a domestic dryer or washer/dryer), wherein a solution according to an embodiment of the present invention is advantageously implemented.
The household appliance 100 comprises an outer casing or cabinet 105 with a worktop 110 and a front panel 115 carrying operational input and setting controls, a drum (not visible in Figure 1 ) rotatably supported inside the cabinet 105 and adapted to be loaded with the items to be washed and/or dried, an opening in a front wall 120 of the cabinet 105 for loading and unloading the items into and from the drum, and a door 125 for closing said opening.
The worktop 110 of the household appliance 100 comprises a drying surface 130 having a plurality of apertures 135, each one of which is fluidly connected to conveying means adapted to direct a flow of air through said apertures 135, for gently drying garments that are placed on the drying surface 130. Garments to be dried can be placed on the drying surface 130, and air is caused to flow through the apertures or perforations 135 so as to hit the garments placed thereon, thereby gently drying it.
In the exemplary embodiment shown, the drying surface 130 comprises two surfaces, one being the surface of the worktop 110 itself, and the other being the surface of a drawer-like element 140 which is slidable in an accommodation or housing 205, visible in Figure 2 , provided in the worktop 110 and having appropriate slide guiding means; the drawer-like element 140 can slide between a first position, in which the drawer-like element 140, and thus its drying surface, is contained, i.e. inserted within the accommodation 205 in the worktop 110 (just a handgrip portion 207 provided on the front of the drawer-like element 140 protruding from the worktop 110 for enabling the extraction of the drawer-like element 140), and a second position (the one depicted in Figure 1 ) in which the drawer-like element 140, and thus its drying surface, is extracted and extended horizontally out of the accommodation 205 in the worktop 110. This arrangement provides a quite large drying surface for lying even relative large garments in stretched condition; in alternative embodiments of the invention, the drying surface may consist of the surface of the drawer-like element 140 only, the surface of the worktop 110 not being provided with apertures, or the drawer-like element 140 may be absent, the drying surface being in such a case formed only by the top surface of the worktop 110. On the other hand, the drying surface of the drawer-like element 140 enables garments to be dried even when the surface of the worktop 110 is not directly accessible, due to obstacles immediately above the worktop.
As visible in Figure 2 , both the worktop 110 and the drawer-like element 140 are internally hollow so as to integrally form an air passage 210 for conveying the flow of drying air under and along the drying surface 130. The accommodation 205 further defines a drying-medium conveying channel adapted to fluidly connect the air passage 210 with air circulating means 215.
The air circulating means 215 may for instance comprise at least one blower arranged inside the appliance cabinet 105 and adapted to take in air from either the interior or the exterior of the cabinet 105 to convey it into the air passage 210. The blower may be housed within a proper accommodation provided to this purpose inside the cabinet of the appliance, in order to take in the ambient air from the interior of the cabinet (which is normally not air-tight and thus is in fluid communication with the external ambient, from which air can enter into the cabinet). A communication duct 220 is provided in the worktop 110 and/or the cabinet 105 to connect the air circulating means 215 to the air passage 210. Other arrangements are however possible, as described in EP 1845185 ; in particular, and merely by way of example, the conveying means may be located outside the casing 105, for example, the air circulating means 210 and the communication duct 220 may be associated to the upper backward portion of the casing 105 in proximity to and below the worktop 110 projecting from the casing, or the air circulating means 210 and the communication duct 220 may arranged above the worktop 110 in fluidly connection with the accommodation 205. In embodiments of the present invention, the air conveyed to the drying surface may be process air used to dry the items inside the dryer drum, or air used to cool a condenser present in the appliance to remove moisture from the process air used to dry the items in the drum.
Heating means 225 may also be provided, for instance comprising one or more electric heating elements arranged downstream the air circulating means 215 and upstream the air passage 210. The heating means 225 may be housed inside the communication duct 220.
According to the present invention, the household appliance 100 is equipped with a steam generation unit 230, for example housed within the cabinet 105. The steam generation unit 230 is fluidly connected to a water tank 235, for example through a valve and/or pump 240, and receives from the tank 235 the water to be converted into steam. The steam generation unit 230 may be of conventional construction, comprising for example an electric boiler. A steam delivery conduit 245 delivers the generated steam from the steam generation unit 230 to a steam delivery nozzle 250 arranged to deliver steam into the drying-medium conveying channel defined by the accommodation 205, and thus to the drying surface 130.
The activation of the air circulating means 215, of the heating means 225 and of the steam generation unit 230 is for example controllable, preferably in an independent manner, by means of specific controls provided on the appliance control panel 115, or directly integrated on the worktop 110, or integrated in the handgrip portion 207 of the drawer-like element 140.
In operation, the garments to be dried are laid upon the drying surface 130, if necessary after extracting the drawer-like element 140 from the worktop 110 (depending on the garments size and/or number). Upon switching on the air circulating means 215 and the heating means 225, hot air starts flowing through the apertures 135 in the drying surface 130 so as to hit the garments laid thereupon and dry them. Upon switching on also the steam generation unit 230, steam is also injected into the drying-medium conveying channel 205, and flows through the apertures 135. In case the garments are not to be dried, but simply refreshed, the steam generation unit 230 may be activated while the air circulating means 215 and the heating means 225 may be left off or be activated.
The steam generation unit 230 may be a special unit specifically provided in the household appliance 100; this may be for example the case of a washing machine, which normally are not equipped with a steam generation unit for other purposes. In alternative embodiments of the present invention, where the household appliance is already equipped with a steam generation unit, like for example in the case of some types of dryers or washer/dryers, the steam generation unit already provided in the household appliance 100 for different purposes may be exploited for delivering steam to the drying surface 130. For example, as depicted in Figure 3 , a steam generation unit 330 already provided in the dryer or washer/dryer 100 for supplying steam into a drum 360 where items to be drier are loaded may be used. In this case, valves 365 and 370 may preferably be provided for in the steam delivery duct 245 and in a duct 375 delivering steam to the drum, such valves being controllable through the controls of the appliance, so as to enable selective delivery of steam either to the drum, or to the drying surface 130, or to both; in this way, it may for example be possible to deliver steam to the drying surface even when the drier is not operating to dry clothes in the drum.
When the steam generation unit 230 operates in conjunction with the air circulating means 215, the flow of air generated by the latter transports the steam and forces it through the apertures 135.
To achieve a more effective delivery of steam through the apertures 135 in the drying surface 130, especially in the case where the air circulating means 215 are not operating, an arrangement similar to that depicted in Figure 4 may be adopted, wherein a plurality of steam nozzles 450 is provided, each one associated with and arranged below a respective one of the apertures 135 in the drying surface 130. This arrangement may be simpler to implement in a household appliance of the type described in the previously cited European patent application No. EP 1845185 , not having the drawer-like element 140 in the worktop 110 (otherwise the steam delivery conduits supplying the nozzles 450 may interfere with the movement of the drawer-like element).
In another embodiment of the invention, the steam generation unit in the household appliance, for example the steam generator 330 already provided in a dryer or washer/dryer for delivering steam to the items in the drum, may be exploited to deliver steam to garments and clothes laid upon the drying surface 130 of the worktop 110 by using a hand-held tool, like the tool 500 shown in Figure 5 , that through a hose 570 is connectable or connected to a steam delivery outlet 575 provided for example on the front panel of the cabinet 105, and at which a steam delivery conduit 580 (preferably with a controllable valve 585 inserted therein) coming from the steam generation unit 330 ends. The valves allow steam to be delivered in a selective way to either the tool 500 or to the drying surface, or to both of them.
The present invention has been here described in some exemplary embodiments thereof. Several modifications to the described embodiments, as well as other embodiments of the invention are possible, without departing from the protection scope defined in the appended claims.
For example, the present invention may be implemented in any one of the different embodiments of household appliance described in the cited European patent applications No. EP 1845185 and No. EP 1854916 .
Also, it should be clear that the solution shown in Figure 5 may be implemented in an appliance which is not provided with the drying surface on the worktop.

Claims

A household appliance (100) comprising a cabinet (105) provided with a worktop (110) defining a surface (130) adapted to support thereon clothes to be treated,
characterized by comprising
a steam generation unit (230,330) operable to generate steam, and a steam delivery system (245,250;245,450;500,570,575,580) fluidly connected to the steam generation unit and adapted to deliver steam to said surface,
wherein said surface has a plurality of apertures (135),
and wherein said steam delivery system is fluidly connected to and adapted to deliver steam through at least some apertures of said plurality of apertures,
the household appliance comprising an air passage (205,210) underneath the surface, said steam delivery system being arranged to deliver steam into said air passage.
The household appliance of claim 1, wherein said steam delivery system comprises at least one steam delivery nozzle (250).
The household appliance of claim 1 or 2, wherein said steam delivery system comprises a plurality of steam delivery nozzles (450), each one arranged to deliver steam directly to a respective one of said apertures.
The household appliance of any one of the preceding claims, wherein said steam delivery system comprises a handheld steam delivery tool (500) fluidly connectable or connected to a steam delivery outlet (575) provided on said cabinet and adapted to deliver steam generated by the steam generation unit.
The household appliance of any one of the preceding claims, wherein said steam generation unit is a steam generation unit provided in said cabinet for generating steam to be supplied to a clothes loading drum of the household appliance.
The household appliance of any of the preceding claims, wherein said apertures are in fluid communication with an air conveying system (205,210,215) adapted to deliver a flow of air through said apertures.
The household appliance of claim 6, wherein said air conveying system comprises at least one heater (225) operable to heat the flow of air to be delivered through said apertures.