EP2536478A1 - Dispositif de filtration par percolation - Google Patents
Dispositif de filtration par percolationInfo
- Publication number
- EP2536478A1 EP2536478A1 EP11702453A EP11702453A EP2536478A1 EP 2536478 A1 EP2536478 A1 EP 2536478A1 EP 11702453 A EP11702453 A EP 11702453A EP 11702453 A EP11702453 A EP 11702453A EP 2536478 A1 EP2536478 A1 EP 2536478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge
- indicator
- electrode
- filter device
- indicator device
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
- C02F2209/445—Filter life
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug
Definitions
- the present invention relates to a percolating filter device of the type with a replaceable cartridge, according to the preamble of the principal claim.
- Filter devices having the aforementioned characteristics are widely used for the filtration of drinking water for domestic use. They are generally made in the form of jugs, kettles, teapots and the like. A typical example of this technology is described in PD2008U000033.
- the filter cartridge contains a filter bed of active carbon, ion exchange resins or other material, whose capacities are liable to become exhausted with use and/or over a period of time, until the cartridge has to be replaced .
- Devices are therefore provided for counting one or more operating parameters of the cartridge in order to indicate its exhaustion when the filtering capacity is considered to be insufficient to ensure the subsequent effective filtration of the liquid to be treated .
- the parameters monitored by these devices include the period elapsed since the initial activation of the cartridge and/or the quantity of liquid filtered. These parameters can be detected directly or through functions correlated with them such as the number of filling cycles of the filter jug, the pressure of a push button, or the like.
- At least one switch is generally connected to the indicator device for the purpose of selecting and/or activating a function of the device, typically at least the initial activation of the indicator device.
- the switches used are of the push button type, generally having rubber protection to make them fluid-tight. These switches have a number of serious drawbacks. In the first place, they require a degree of pressure for their actuation. This creates a state of uncertainty in the user concerning the effectiveness of the actuation, especially since the pressure exerted may be insufficient, the contacts may be oxidized, and/or the repetition of the pressure over a period of time may cause damage to the rubber protection.
- the principal object of the invention is to provide a filter device of the aforesaid type which is structurally and functionally designed to overcome all the drawbacks described with respect to the aforementioned prior art.
- a principal aim of the invention is to provide a filter device in which the cartridge monitoring functions are highly reliable. This object and other aims are achieved by the invention by means of a percolating filter device made in accordance with the appended claims.
- Fig. 1 is a schematic sectional view of a filter device in the form of a jug
- Fig. 2 is a plan view from above of a detail of the device of Fig . 1.
- the number 1 indicates the whole of a percolating filter device of the type to which the present invention relates.
- the device is a filter jug with a replaceable cartridge, but similar considerations are applicable to kettles, teapots, cafetieres and the like.
- the jug 1 comprises a housing 2 having a mouth which is closed removably by a cover 3.
- a funnel-like divider (or “hopper”) 6 is inserted into the housing to form within the jug 1 an upper bowl 4 for collecting the water to be filtered and a lower bowl 5 for collecting the filtered water.
- a seat 7 is formed in the divider 6 to receive a replaceable cartridge 9 which is positioned in such a way that the water to be filtered flows through this cartridge 9 as it passes from the upper to the lower bowl.
- a device 10 for indicating the life cycle of the cartridge 9 is provided on the cover 3 (or on another part of the housing of the jug, for example the handle 11) to indicate the exhaustion of the cartridge when the latter is due to be replaced .
- the indicator device 10 includes a housing 12 fitted in a seat 13 in the cover 3, a display 14 for showing a signal indicating the useful life of the cartridge, such as a bar diagram representing the remaining useful life, and an electrical switch device for selecting and/or activating a function of the indicator device, for example in order to activate a counter of the time that has elapsed since the first use of the cartridge.
- the switch device includes a circuit component with a capacitive proximity switch built into an integrated circuit 15 and an operating electrode 16.
- the electrode 16 is formed by a strip of conductive material mounted on the container of the filter device and connected to the circuit 15 by means of conductors which are not shown.
- the electrode 16 is mounted in the proximity of the indicator device 10 on the cover 3 or on the handle 11 of the jug.
- the electrode 16 is also preferable for the electrode 16 to be incorporated in the housing 12 of the indicator device in such a way that the latter forms a unit which can be handled separately and is self-contained, completely independent and sealed .
- the electrode 16 acts as the push button member of a conventional switch, with the evident difference that, since it is a capacitive electrode, it actuates the electrical switch of the circuit 15 when the dielectric field around the electrode is disturbed. Thus it is not even necessary to touch the electrode 16 physically in order to activate the switch of the circuit 15; it is sufficient to bring a finger close to it. Because of this arrangement, the electrode 16 can be incorporated into the housing 12 of the indicator device, where it is fully protected from accidental contact with liquids and moisture. This also makes it possible to make the housing 12 completely fluid-tight since it is no longer necessary to have wires passing through it and/or to provide sealing with membranes which are rather unreliable.
- the invention resolves the aforementioned problem while providing numerous benefits including complete immunity to wear combined with considerable sensitivity to simple contact, enabling the device 12 to be constructed in such a way as to be fully fluid-tight and reliable over a period of time.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
La présente invention concerne un dispositif de filtration par percolation (1) du type ayant une cartouche remplaçable (9) qui comprend un dispositif (10) destiné à indiquer le cycle de vie en service de la cartouche (9) afin d'indiquer l'état d'épuisement de la cartouche (9) lorsque la cartouche (9) doit être remplacée et un dispositif de commutateur électrique pour choisir et/ou activer une fonction du dispositif indicateur (10), le dispositif indicateur (10) comprenant un commutateur de proximité capacitif avec une électrode de travail fixée sur le dispositif de filtration (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD2010A000044A IT1399048B1 (it) | 2010-02-17 | 2010-02-17 | Dispositivo filtrante a percolazione |
PCT/EP2011/051683 WO2011101265A1 (fr) | 2010-02-17 | 2011-02-04 | Dispositif de filtration par percolation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2536478A1 true EP2536478A1 (fr) | 2012-12-26 |
Family
ID=42813509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11702453A Withdrawn EP2536478A1 (fr) | 2010-02-17 | 2011-02-04 | Dispositif de filtration par percolation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2536478A1 (fr) |
IT (1) | IT1399048B1 (fr) |
TW (1) | TW201143877A (fr) |
WO (1) | WO2011101265A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPD20110349A1 (it) * | 2011-11-03 | 2013-05-04 | Toso Liliana Dal | Dispositivo di conteggio semplificato della durata utile o residua di una cartuccia filtrante per sistemi filtranti a percolazione. |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPD20010234A1 (it) * | 2001-10-02 | 2003-04-02 | Struttura Srl | Caraffa filtrante per la depurazione di acqua, ad uso domestico. |
ITPD20040095A1 (it) * | 2004-04-08 | 2004-07-08 | Laica Srl | Caraffa filtrante a cartuccia sostituibile |
US7487677B2 (en) * | 2004-04-19 | 2009-02-10 | Fook Tin Technologies Ltd. | Apparatus and methods for monitoring water consumption and filter usage |
ITPD20060425A1 (it) * | 2006-11-15 | 2008-05-16 | Laica Spa | Caraffa per filtraggio liquidi |
ITPD20080013A1 (it) * | 2008-01-15 | 2009-07-16 | Laica Spa | Metodo per la determinazione dell'esaurimento di una cartuccia filtrante in un sistema filtrante a cartuccia sostituibile e dispositivo operante secondo tale metodo |
DE102008023488C5 (de) * | 2008-05-14 | 2021-12-09 | Bwt Water+More Gmbh | Wasserfiltervorrichtung |
US8823393B2 (en) * | 2008-10-01 | 2014-09-02 | Ident Technology Ag | Device and process for touch and proximity detection |
-
2010
- 2010-02-17 IT ITPD2010A000044A patent/IT1399048B1/it active
-
2011
- 2011-02-04 EP EP11702453A patent/EP2536478A1/fr not_active Withdrawn
- 2011-02-04 WO PCT/EP2011/051683 patent/WO2011101265A1/fr active Application Filing
- 2011-02-09 TW TW100104233A patent/TW201143877A/zh unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2011101265A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011101265A1 (fr) | 2011-08-25 |
TW201143877A (en) | 2011-12-16 |
ITPD20100044A1 (it) | 2011-08-18 |
IT1399048B1 (it) | 2013-04-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20120731 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20131205 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20140617 |