DE102017121894A1 - Filter cartridge for a table water filter - Google Patents

Abstract

The invention relates to a filter cartridge for a table water filter, which comprises a housing with at least one inlet and at least one outlet and a circumferential sealing edge. The housing is filled with at least one ion exchange material. Behind the inlet and / or before the outlet of the filter cartridge is a sheet with activated carbon fibers, in particular an activated carbon fleece, arranged.

Description

Field of the invention

The invention relates to a filter cartridge for a table water filter. In particular, the invention relates to a filter cartridge having an ion exchange material usable for a gravity driven table water filter. The invention further relates to a table water filter with a filter cartridge.

Background of the invention

Filter cartridges for table water filters, in particular for gravity-driven table water filters, are known in practice. Such filter cartridges have a sealing edge, which rests in the inserted state on the wall of a funnel. Water is poured into the funnels of the table water filter and the water flows through the filter cartridge by gravity, in order to then collect in a water collection room.

Such filter cartridges are less for filtering in the technical sense, ie the removal of suspended matter, rather than the treatment of drinking water. In particular, filter cartridges usually comprise an ion exchange material, whereby the degree of hardness of the water to be treated can be lowered.

For the removal of harmful substances, in particular for the removal of chlorine, it is known from practice to mix the ion exchange material, which is present in particular as granules, with activated carbon, which is likewise present as granules, pellets or powder. The activated carbon is used in particular the chlorine removal.

This is expensive and for the recycling of a filter cartridge in so far disadvantage, as that it is only consuming possible to separate the activated carbon in turn from the ion exchange material.

Object of the invention

The invention is based on the object, at least to reduce the disadvantages of the prior art.

Summary of the invention

The object of the invention is already achieved by a filter cartridge according to claim 1.

Preferred embodiments and further developments of the invention can be found in the subject matter of the dependent claims, the description and the drawings.

The invention relates to a filter cartridge for a table water filter.

In particular, the invention relates to a filter cartridge which can be used in a gravity-driven water balance filter.

The filter cartridge comprises a housing with at least one inlet and at least one outlet and a circumferential sealing edge. Preferably, the housing consists of a lower part and a lid, wherein the sealing edge substantially forms an upper end of the lower part.

The lower part is in particular designed as a cup-shaped injection-molded part.

Furthermore, the housing, in particular the cup-shaped housing lower part, is filled with an ion exchange material. The ion exchanger material is present in particular as a bed. In particular, it is a weakly acidic ion exchange resin.

According to the invention, based on the direction of flow, with which the cartridge is flowed through by the water to be treated during normal use, a sheet with activated carbon fibers, in particular an activated carbon nonwoven, is arranged behind the inlet and / or before the outlet.

In the context of the invention, an activated carbon nonwoven is understood to mean a surface in the form of a knitted fabric of activated carbon fibers. The fleece can also be needled or pressed.

Instead of a nonwoven, according to another embodiment of the invention, e.g. Also, a woven or knitted fabric of activated carbon fibers are used. This can result in higher dimensional stability but at the same time result in a smaller specific surface area.

The sheet with activated carbon fibers, in particular the activated carbon nonwoven, preferably consists of pure activated carbon fibers or pyrolysed synthetic fibers, and is therefore not plastic fibers coated with a carbon layer. The special properties of carbon fiber fabrics are their enormous surface area and the fine network of external and internal pores and channels to which substances can attach. This also results in the significantly improved chlorine removal line.

The sheet with activated carbon fibers is arranged according to a preferred embodiment of the invention behind a bed of ion exchange material and before the outlet.

So it is particularly possible to form the ion exchange material as granules, which is retained by the sheet with activated carbon fibers.

Conventionally known filter cartridges often include a housing with a perforated bottom. Since this perforation is usually not sufficient to safely retain an ion exchange material, in the soil, a mesh or a fleece made of plastic is used, which retains the particles.

The sheet with activated carbon fibers can, according to a cartridge used, now simultaneously serve the retention of the particles, so that can be dispensed with a further filter material between ion exchange material and spout.

Through an outlet-side fabric with activated carbon fibers, particle-free treated water can be provided over the entire service life of the filter cartridge.

The sheet with activated carbon fibers can for example be inserted into the housing, clipped, glued or injected.

According to a preferred embodiment, the sheet with activated carbon fibers consists of fibers having an average diameter of 2 to 100 μm, preferably of 10 to 30 μm.

The sheet with activated carbon fibers preferably has a thickness of 0.1 to 10 mm, more preferably 0.5 to 4 mm.

It has been found that by using a sheet with activated carbon fibers, only about 1/30 of the activated carbon composition is needed with the same chlorine removal performance as when using activated carbon particles mixed with the ion exchange granules.

Further, the ion exchange material is preferably free of activated carbon, which allows a clean separation of the materials during regeneration or recycling of the ion exchanger.

In a preferred embodiment of the invention, the sheet with activated carbon fibers, in particular activated carbon nonwoven, has a specific surface area of 500 to 1500 m ² / g.

The invention further relates to a table water filter comprising the filter cartridge described above. It is in particular a gravity-driven table water filter in which the water passes through the filter cartridge due to its own gravity.

list of figures

• 1 ist eine schematische Schnittansicht einer erfindungsgemäßen Filterkartusche.
• 2 ist eine perspektivische Ansicht eines Tischwasserfilters, in welchen die Filterkartusche eingesetzt ist.

The invention will be described below with reference to a schematic embodiment with reference to the drawings 1 and 2 be explained in more detail.

• 1 is a schematic sectional view of a filter cartridge according to the invention.
• 2 is a perspective view of a table water filter, in which the filter cartridge is inserted.

Detailed description of the drawings

1 is a schematic sectional view of an embodiment of a filter cartridge according to the invention 1 ,

The filter cartridge 1 includes a housing 2 with at least one enema 3 and a spout 5 , In this embodiment, the spout is 5 formed as a tube.

This includes the housing 2 the filter cartridge 1 an inner housing 2a as well as an outer housing 2 B which before the spout 5 form a siphon.

The flow direction of the water is marked with arrows.

In this embodiment, the water leaves over the perforated bottom 6 of the inner casing 2a the Inngen housing, rises and enters the outlet 5 out.

It is understood, however, that it is also within the meaning of the invention, a filter cartridge 1 with a single-walled housing 2 provide. In such an embodiment, the water would come directly from the ground 6 escape (not shown).

The housing 2 is cup-shaped and formed with an ion exchange granules 7 filled.

Next is the case 2 with a circumferential sealing edge 4 provided to be inserted into the funnel of a table water filter.

According to the invention, with respect to the flow properly, between the ion exchange granules 7 and the spout 5 an activated carbon fleece 8th used.

The activated carbon fleece 8th preferably covers the entire floor 6 of the housing 2 or the inner housing 2a ,

The activated carbon fleece 8th can be inserted or glued.

It is also conceivable during the production of the activated carbon fleece 8th in the ground 6 or in the sidewall 9 of the housing with inject.

The activated carbon fleece can be from a perforated floor 6 be supported or even the ground 6 of the housing 2 form.

It has been found that by the activated carbon fleece used 8th compared to a mixture of ion exchange material and activated carbon, a higher chlorine removal performance can be achieved. It is therefore necessary only a small amount of activated carbon.

In particular, a filter cartridge with 50 to 200 g of ion exchange material and only 0.1 to 10 g of activated carbon in the form of activated carbon nonwoven can be provided.

2 shows in a perspective view in a table water filter 10 used filter cartridge 1 ,

The filter cartridge 1 is in the funnel 11 used.

Due to the sealing edge ( 4 in 1 ), which is in the funnel 11 sits, passes through the water to be treated, which passes through the filling opening 12 in the funnel 11 is poured, the filter cartridge 1 and collects in the water collection room 15 ,

The table water filter 10 is as a pot with a handle 13 and a spout 14 educated.

By the invention, a filter cartridge with high chlorine removal performance could be provided with a small amount of activated carbon simultaneously. Through a separation of Ionenaustauschermaterialschüttung and activated carbon could be provided immediately easier recycling and easier regeneration of the spent cartridges.

LIST OF REFERENCE NUMBERS

1

filter cartridge

2

casing

2a

Inngengehäuse

2 B

outer casing

3

enema

4

sealing edge

5

outlet

6

ground

7

Ionenaustauschergranulat

8th

Activated carbon nonwoven

9

Side wall

10

Water filter

11

funnel

12

fill opening

13

Handle

14

spout

15

Water collection chamber

Claims (10)

Filter cartridge for a table water filter, comprising a housing having at least one inlet and at least one outlet and a peripheral sealing edge, wherein the housing is filled with at least one ion exchange material, characterized in that, based on the flow direction, behind the inlet and / or before the outlet a sheet with activated carbon fibers, in particular an activated carbon fleece, is arranged. Filter cartridge according to the preceding claim, characterized in that the fabric is arranged with activated carbon fibers behind a bed of ion exchange material and before the outlet. Filter cartridge according to one of the preceding claims, characterized in that the ion exchange material is formed as granules, which is held back by the sheet with activated carbon fibers. Filter cartridge according to one of the preceding claims, characterized in that the fabric is inserted, clipped or injected with activated carbon fibers in the housing. Filter cartridge according to one of the preceding claims, characterized in that the sheet with activated carbon fibers, in particular activated carbon fleece, consists of fibers having an average diameter of 2 to 100 pm, preferably from 10 to 30 pm. Filter cartridge according to one of the preceding claims, characterized in that the sheet with activated carbon fibers, a thickness of 0.1 to 10 mm, preferably from 0.5 to 4 mm. Filter cartridge according to one of the preceding claims, characterized in that the ion exchange material is substantially free of activated carbon. Filter cartridge according to one of the preceding claims, characterized in that the sheet with activated carbon fibers consists of pure activated carbon fibers or pyrolysed plastic fibers. Filter cartridge according to one of the preceding claims, characterized in that the sheet with activated carbon fibers has a specific surface area of 500-1500 m ² / g. Table water filter, comprising a filter cartridge according to one of the preceding claims.

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