EP1616992B1 - Appareil de repassage comprenant un filtre - Google Patents

Appareil de repassage comprenant un filtre Download PDF

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Publication number
EP1616992B1
EP1616992B1 EP04425529A EP04425529A EP1616992B1 EP 1616992 B1 EP1616992 B1 EP 1616992B1 EP 04425529 A EP04425529 A EP 04425529A EP 04425529 A EP04425529 A EP 04425529A EP 1616992 B1 EP1616992 B1 EP 1616992B1
Authority
EP
European Patent Office
Prior art keywords
water
filter
amount
iron
reservoir
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.)
Not-in-force
Application number
EP04425529A
Other languages
German (de)
English (en)
Other versions
EP1616992A1 (fr
Inventor
Arturo Morgandi
Marco Gregis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tenacta Group SpA
Original Assignee
Tenacta Group SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tenacta Group SpA filed Critical Tenacta Group SpA
Priority to DE602004024050T priority Critical patent/DE602004024050D1/de
Priority to EP04425529A priority patent/EP1616992B1/fr
Priority to PT04425529T priority patent/PT1616992E/pt
Priority to AT04425529T priority patent/ATE448354T1/de
Priority to ES04425529T priority patent/ES2336560T3/es
Publication of EP1616992A1 publication Critical patent/EP1616992A1/fr
Application granted granted Critical
Publication of EP1616992B1 publication Critical patent/EP1616992B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/12—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source

Definitions

  • the present invention refers to an ironing apparatus.
  • the present invention refers to an ironing apparatus of the type comprising an iron, a water reservoir at room temperature and at atmospheric pressure and a pump for feeding water from the reservoir to the iron, as disclosed, for example, by GB 2 308 135 .
  • the iron comprises a main body adapted to contain the water coming from the reservoir, a perforated heat conducting metal plate on the base of the main body and heat generation means associated with said plate for heating it during use.
  • steam is generated when the water at room temperature comes into contact with the boiling plate and then goes out from the holes in the plate.
  • the salts contained in the water can form incrustations on the plate during the evaporation step.
  • incrustations mainly consist of carbon deposits, hydrates and calcium and magnesium sulphates.
  • ironing apparatuses are known in which the water reservoir is provided with a ion exchange resin filter to reduce the hardness of the water see e.g. EP 0 554 549 .
  • a ion exchange resin filter to reduce the hardness of the water see e.g. EP 0 554 549 .
  • a technique of the prior art for avoiding the problem of calefaction is that of coating the surface of the plate of the iron with a suitable porous varnish adapted to absorb the water droplets that form due to calefaction.
  • varnishes must be sufficiently porous, withstand high temperatures (for example, up to 300 °C) and must be such as not to detach from the plate during use. To avoid the detachment of the varnish, the plate must be subjected to an accurate pickling process, before the application of the varnish. This involves long application times and relatively high costs.
  • EP 0 554 549 discloses an iron comprising a heating plate, a steam generation chamber, an internal water tank, and an internal filtering element comprising a filter.
  • the filter has a bypass channel so that when tap water is introduced by the user into the filtering element both filtered water and unfiltered water are provided to water tank and, then, to the steam generation chamber.
  • the percentage of filtered tap water ranges from 30% to 70%.
  • EP 0 554 549 states that this mixture of filtered and unfiltered water is useful to keep the PH of the water in the water tank within a range of neutrality values.
  • the present invention therefore relates to an ironing apparatus according to claim 1.
  • the water on the whole supplied to the iron has a greater hardness than that of the filtered water. This allows, right from the first time the iron is used, a layer of deposits to be formed on the metal plate which is adapted to absorb the water droplets possibly formed due to the phenomenon of calefaction.
  • the first and second amounts of water are such as to obtain the desired hardness for the water on the whole supplied to the iron.
  • the first and second amount of water are advantageously selected so as to effectively reduce the problem of calefaction right from the first time the iron is used and - at the same time - so as not to compromise the useful life of the iron.
  • the first and second amount of water supplied by the pump to the iron have an overall hardness that is greater than 2 °F.
  • the first and second amount of water have an overall hardness greater than 3 °F.
  • the first and second amounts of water have an overall hardness less than 12 °F.
  • such a hardness is comprised between 4 and 10 °F. Even more preferably, it is comprised between 6 and 7 °F.
  • the Applicant observes that the first and second amount of water must, in general, be selected according to the hardness of the water contained in the reservoir and to the filtering capacity of the filter (or rather according to the hardness of the filtered and unfiltered water).
  • a filter that provides a hardness of the water that is not greater than 2°F, starting from a tap water having a nominal hardness of about 30°F, is considered.
  • the pump is adapted to provide the iron with the first amount of filtered water, mixed with the second amount of unfiltered water.
  • the filter comprises filtering material.
  • the filtering material comprises ion exchange resins.
  • the filtering capacity of ion exchange resins is such as to obtain filtered water with a hardness not greater than 2 °F when the water contained in the reservoir has a nominal hardness equal to about 30°F.
  • the filter comprises a first inlet for the water to be filtered.
  • the filter advantageously comprises an outlet connected to the pump.
  • the first inlet is advantageously in communication with the outlet.
  • the filter advantageously comprises a filtering zone.
  • the first inlet is advantageously in communication with the outlet through the filtering zone.
  • the filtering zone typically comprising filtering material for the passage of the water to be filtered from the first inlet towards the outlet, through the filtering material.
  • the filter comprises water-permeable retaining elements adapted to hold the filtering material inside the filtering zone and at the same time to allow the passage of the water through them.
  • retaining elements are polypropylene filters or felts.
  • the filter also comprises a second inlet for the water.
  • the second inlet is advantageously in communication with the outlet.
  • the filter also comprises the mixing zone, distinct from the filtering zone, which connects the second inlet to the outlet.
  • the mixing zone also connects the filtering zone to the outlet.
  • the outlet of the filter is advantageously situated at the mixing zone.
  • the second inlet of the filter is advantageously situated at the mixing zone.
  • the first inlet is advantageously situated near the filtering zone.
  • the mixing zone is advantageously separated from the filtering zone through at least one of the retaining elements.
  • the first and second inlet have physical characteristics such that the overall amount of water at the outlet of the filter, sucked by the pump through the first and second inlet, has the desired proportions of filtered water and unfiltered water.
  • the first and second inlet are of a size such that the overall amount of water at the outlet of the filter, sucked by the pump through the first and second inlet, has the desired proportions of filtered water and unfiltered water.
  • the filter has an elongated shape. Preferably, it has a cylindrical shape.
  • the filter extends for most of the length of the water reservoir.
  • the present invention relates to a method according to claim 14.
  • the ironing apparatus 100 of the invention shown comprises an iron 20, a pump 30, a water reservoir 10 at room temperature and at atmospheric pressure and two ducts 31, 32 for respectively connecting the reservoir 10 to the pump 30 and the pump 30 to the iron 20.
  • the iron 20 is of the conventional type and typically comprises a main body 23, a grip 22, a heat conducting metal plate 21 fixed to the base of the main body 23 and heat generation means (not shown) associated with said plate 21 to heat it during use.
  • the pump 30 is adapted to draw water from the reservoir 10 and to supply it to the main body 23 of the iron 20.
  • the pump 30 is of the conventional type, typically an electric micro-pump.
  • the plate 21 is typically equipped with holes (not shown) for the emission of the generated steam. Moreover, it is typically made from aluminium.
  • the heat generation means typically comprise a conventional electrical resistance embedded in the plate 21.
  • the water reservoir 10 comprises a filter 40.
  • the filter 40 comprises ion exchange resins as filtering material.
  • ion exchange resins are known that are capable of reducing the hardness of water to values of no more than 2°F, starting from a hardness of the water of 30 °F.
  • such resins are commercially available from the company Purolite.
  • the filter 40 comprises a housing having a first inlet 41 and a second inlet 42 for the water contained in the reservoir 10 and an outlet 43 connected to the pump 30.
  • the housing is preferably made from polypropylene that is a low-cost material readily available on the market and easy to seal by welding.
  • the inlets 41, 42 can, for example, consist of a hole of any shape, for example circular, or a channel having, for example, a circular section.
  • the filter 40 is situated on the base of the reservoir 10. Suitable supports (not shown) hold the filter 40 raised from the base of the reservoir 10, for example by a few mm, to allow the water to enter through the two inlets 41, 42.
  • the two inlets 41, 42 are positioned at the two opposite ends of the base of the filter 40.
  • the filter 40 also comprises a filtering zone 46 with the filtering material for the passage of the water to be filtered from the first inlet 41 towards the outlet 43, through the filtering material.
  • the filtering zone 46 is bounded at the top and at the bottom by the walls of the housing of the filter 40 and at the two ends by a first and a second retaining element 44, 45 that are permeable to water and adapted to hold the filtering material inside the filtering zone 46, preventing it from escaping from the inlets 41, 42, and at the same time to allow the passage of the water through them.
  • retaining elements 44, 45 are filters made from polypropylene or felts.
  • the filter 40 also comprises a mixing zone 47, distinct from the filtering zone 46, which connects the second inlet 42 to the outlet 43.
  • the filtering zone 46 is in communication with the outlet 43 through the mixing zone 47.
  • the filtering zone 46 and the mixing zone 47 are separated by the second retaining element 45.
  • the mixing zone 47 is defined in part by the walls of the filter 40 and in part by the second retaining element 45.
  • part of the water of the reservoir 10 enters into the filter 40 through the first inlet 41, passes through the first retaining element 44, through the filtering zone 46 in which it is filtered by the filtering material, through the second retaining element 45, through the mixing zone 47 and exits from the outlet 43 to be supplied to the main body 23 of the iron 20 through the ducts 31, 32.
  • part of the water of the reservoir 10 enters into the filter 40 through the second inlet 42, passes through the mixing zone 47 in which it is mixed with the filtered water coming from the filtering zone 46 and exits from the outlet 43 to be supplied thus mixed to the main body 23 of the iron 20 through the ducts 31, 32.
  • the proportions of filtered and unfiltered water, pumped by the pump 30 through the inlets 41 and 42, generally depend upon the physical characteristics thereof like, for example, the size and the type of surface with which the water comes into contact.
  • the physical characteristics of the inlets and, in particular, their size are advantageously selected so as to obtain a hardness of the mixed water supplied to the iron 20 comprised between 3 and 12 °F, preferably comprised between 4 and 10 °F and, more preferably, comprised between 6 and 7 °F.
  • the Applicant has found that such hardness values for the mixed water ensure that, right from the first use of the iron, a light layer of deposits forms on the plate of the iron that allows the water droplets possibly formed due to the phenomenon of calefaction to be effectively absorbed and, at the same time, allows the useful life of the iron not to be compromised.
  • the apparatus of the invention shall be designed taking into account average reference values of hardness of the starting water and of filtering capacity, according to the market under consideration.
  • the hardness of the tap water is typically comprised between 15 and 50°F.
  • a value conventionally considered for the hardness of the tap water is 30 °F.
  • an ion exchange resin filter typically used in conventional ironing apparatuses provides a hardness of the water typically of no more than 2°F, starting from a hardness of about 30°F.
  • a filtering material that provides a nominal hardness of the filtered water of no more than 2°F and the case in which the two inlets 41, 42 consist of two channels with circular section - the ratio between the diameter of the first inlet 41 and the diameter of the second inlet 42 is advantageously comprised between 0.04 and 1, the length of the channel of the first inlet 41 is advantageously comprised between 0.1 mm and 0.5 mm whereas the length of the channel of the second inlet 42 is advantageously comprised between 1 mm and 5 mm.
  • the Applicant observes that commercially available conventional filters, used in conventional ironing apparatuses, provide the iron with filtered water having a hardness typically of no more than 2°F, starting from a hardness of the water equal to about 30 °F. With such a hardness value of the water, the layer of deposits that forms with time on the plate of the iron allows the water droplets formed by means of the phenomenon of calefaction to be effectively absorbed only after many uses of the iron (typically, only after having consumed about 15 litres of water) and not, like in the iron of the present invention, right from the first use.
  • the filter 40 has a narrow elongated shape, for example cylindrical. This advantageously allows the entire flow of water that passes through the filtering zone 46 to be effectively filtered. That is, the narrow shape allows the flow of water to fully come into contact with all of the filtering material contained in the filtering zone 46 whereas the elongated shape allows the flow of water to remain in contact with the filtering material for a relatively long time (equal to about 2-4 minutes).
  • the filter 40 extends for most of the length of the water reservoir 10. This advantageously allows the amount of filtering material contained in the filtering zone 46, and thus the useful life of the filter, to be increased.
  • the filter 40 has a volume of 130 cc and is able to contain 100-120 gr of ion exchange resins. This allows a useful life of the filter equal to at least 110 litres to be obtained.
  • conventional ironing apparatuses typically have a water reservoir with a replaceable filter and an opening to allow the passage of the filter at the time of its replacement.
  • the filter is typically small in size.
  • conventional filters are adapted to contain 60 gr of ion exchange resins, which allows a useful life of the filter of no more than 80 litres to be obtained.
  • the latter typically has a labyrinth-shaped filtering zone to allow the flow of water to remain in contact with the filtering material for a suitable time.
  • the labyrinth-shaped filtering zone involves higher production time and costs with respect to the linear shape (for example cylindrical) of the filtering zone of the filter of the apparatus of the invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Irons (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Centrifugal Separators (AREA)
  • Filtering Materials (AREA)

Claims (14)

  1. Appareil de repassage (100) comprenant
    - un fer (20) comprenant une plaque conductrice de chaleur (21) avec des trous,
    - un réservoir d'eau (10) comprenant un filtre (40) pour réduire la dureté de l'eau, et
    - une pompe (30) connectée entre le réservoir (10) et le fer (20) adaptée à tirer une première quantité d'eau du réservoir (10) en la faisant passer au travers du filtre (40) et à approvisionner la première quantité d'eau ainsi filtrée au fer (20),
    caractérisé en ce que le filtre comprend également une zone de mélange (47) ayant une entrée (42) d'eau non filtrée, une entrée d'eau filtrée et une sortie (43) connectée à la pompe (30), la pompe (30) étant également adaptée à tirer une seconde quantité d'eau non filtrée depuis le réservoir (10), plus faible que la première quantité, la faisant passer au travers de la zone de mélange (47) en même temps que la première quantité d'eau filtrée afin d'alimenter le fer (20) avec la seconde quantité d'eau non filtrée mélangée avec la première quantité d'eau filtrée par lequel les première et seconde quantités d'eau mélangées ont une dureté globale de plus de 2 °F.
  2. Appareil de repassage (100) selon la revendication 1, dans lequel le filtre (40) comprend une première entrée (41) pour la première quantité d'eau devant être filtrée.
  3. Appareil de repassage (100) selon la revendication 1, dans lequel le filtre (40) comprend une sortie (43) connectée à la pompe (30).
  4. Appareil de repassage (100) selon la revendication 3, dans lequel le filtre (40) comprend une première entrée (41) en communication avec la sortie (43).
  5. Appareil de repassage (100) selon la revendication 1, dans lequel le filtre (40) comprend une seconde entrée (42).
  6. Appareil de repassage (100) selon la revendication 3, dans lequel le filtre (40) comprend une seconde entrée (42) en communication avec la sortie (43).
  7. Appareil de repassage (100) selon la revendication 4, dans lequel le filtre (40) comprend une zone de filtration (46) comprenant une matière filtrante pour le passage de l'eau devant être filtrée depuis la première entrée (41) vers la sortie (43), à travers la matière filtrante.
  8. Appareil de repassage (100) selon les revendications 6 et 7, dans lequel la zone de mélange (47) est à l'intérieur du filtre (40), distincte de la zone de filtration (46), et connecte la seconde entrée (42) à la sortie (43).
  9. Appareil de repassage (100) selon la revendication 8, dans lequel la zone de mélange (42) connecte également la zone de filtration (46) et la sortie (43).
  10. Appareil de repassage (100) selon la revendication 1, dans lequel les première et seconde quantités d'eau mélangées ont une dureté globale de plus de 3 °F.
  11. Appareil de repassage (100) selon la revendication 1, dans lequel les première et seconde quantités d'eau mélangées ont une dureté globale de moins de 12 °F.
  12. Appareil de repassage (100) selon la revendication 1, dans lequel les première et seconde quantités d'eau mélangées ont une dureté globale comprise entre 4 et 10 °F.
  13. Appareil de repassage (100) selon la revendication 12, dans lequel les première et seconde quantités d'eau mélangées ont une dureté globale comprise entre 6 et 7 °F.
  14. Procédé pour réduire le phénomène de caléfaction dans un appareil de repassage comprenant un réservoir d'eau (10) et un fer (20) ayant une plaque conductrice de chaleur (21) avec des trous, ladite méthode comprenant les étapes de:
    a) filtrer une première quantité d'eau du réservoir (10);
    b) tirer la première quantité d'eau filtrée depuis le réservoir (10) et l'approvisionner au fer (20);
    caractérisé en ce qu'elle comprend également l'étape c) de tirer une seconde quantité d'eau non filtrée depuis le réservoir (10), plus faible que la première quantité, la faisant passer au travers d'une zone de mélange (47) ainsi que la première quantité d'eau filtrée afin d'alimenter le fer (20) avec la seconde quantité d'eau non filtrée mélangée avec la première quantité d'eau filtrée par lequel les première et seconde quantités d'eau mélangées ont une dureté globale de plus de 2 °F.
EP04425529A 2004-07-15 2004-07-15 Appareil de repassage comprenant un filtre Not-in-force EP1616992B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE602004024050T DE602004024050D1 (de) 2004-07-15 2004-07-15 Bügelvorrichtung mit einem Filter
EP04425529A EP1616992B1 (fr) 2004-07-15 2004-07-15 Appareil de repassage comprenant un filtre
PT04425529T PT1616992E (pt) 2004-07-15 2004-07-15 Aparelho de engomar com um filtro
AT04425529T ATE448354T1 (de) 2004-07-15 2004-07-15 Bügelvorrichtung mit einem filter
ES04425529T ES2336560T3 (es) 2004-07-15 2004-07-15 Aparato de planchado que comprende un filtro.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425529A EP1616992B1 (fr) 2004-07-15 2004-07-15 Appareil de repassage comprenant un filtre

Publications (2)

Publication Number Publication Date
EP1616992A1 EP1616992A1 (fr) 2006-01-18
EP1616992B1 true EP1616992B1 (fr) 2009-11-11

Family

ID=34932639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425529A Not-in-force EP1616992B1 (fr) 2004-07-15 2004-07-15 Appareil de repassage comprenant un filtre

Country Status (5)

Country Link
EP (1) EP1616992B1 (fr)
AT (1) ATE448354T1 (fr)
DE (1) DE602004024050D1 (fr)
ES (1) ES2336560T3 (fr)
PT (1) PT1616992E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014155310A2 (fr) 2013-03-28 2014-10-02 Indesit Company S.P.A. Appareil de repassage, en particulier destiné à un usage domestique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3051019A1 (fr) * 2015-01-27 2016-08-03 Tenacta Group S.p.A. Appareil de repassage
EP3638839B1 (fr) 2017-06-16 2023-08-02 Spectrum Brands, Inc. Générateur de vapeur doté d'une chambre de préchauffage et d'un filtre
IT202000003841A1 (it) * 2020-02-25 2021-08-25 Tenacta Group Spa Metodo per migliorare le prestazioni di un ferro da stiro ed apparecchiatura che utilizza detto metodo
CN113403825A (zh) * 2021-06-24 2021-09-17 杭州点点滴滴节能科技开发有限公司 一种工业熨烫专用供水装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743917A1 (de) * 1987-12-23 1989-07-06 Bosch Siemens Hausgeraete Dampfbuegeleisen
FR2648163B1 (fr) * 1989-06-08 1991-10-18 Seb Sa Fer a repasser a cartouche demineralisante
DE4203414A1 (de) * 1992-02-06 1993-08-12 Braun Ag Dampfbuegeleisen mit austauschbarem filtereinsatz
FR2688013B1 (fr) * 1992-02-28 1995-11-10 Moulinex Sa Centrales de repassage a vapeur comprenant un fer a repasser.
GB2308135A (en) * 1995-12-15 1997-06-18 Singer Co Nv Steam treating garments:water supply
FR2785975B1 (fr) * 1998-11-17 2001-02-02 Seb Sa Generateur de vapeur a purge rapide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014155310A2 (fr) 2013-03-28 2014-10-02 Indesit Company S.P.A. Appareil de repassage, en particulier destiné à un usage domestique
EP3059343A1 (fr) 2013-03-28 2016-08-24 Indesit Company S.p.A. Appareil de repassage, en particulier pour usage domestique, comprenant un élément filtrant

Also Published As

Publication number Publication date
EP1616992A1 (fr) 2006-01-18
DE602004024050D1 (de) 2009-12-24
ES2336560T3 (es) 2010-04-14
PT1616992E (pt) 2010-02-18
ATE448354T1 (de) 2009-11-15

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