DE102018119771A1 - Filter device for the treatment of drinking water - Google Patents

Abstract

Filter device 100 for the treatment of drinking water for particle filtration, water softening or germ reduction, wherein the filter device 100 comprises an activated carbon filter 4 and a reverse osmosis filter system 5, and wherein the activated carbon filter 4 and the reverse osmosis filter system 5 are connected to each other via a common inflow line 1 and outflow line 14 such that Activated carbon filter 4 and reverse osmosis filter system 5 from which the water supplied flows in parallel.

Description

The invention relates to a filter device for the treatment of drinking water, in particular for particle filtration, water softening or germ reduction, according to the independent claim.

It is well known that drinking water that has been treated by the public waterworks is subject to gradual contamination with undesirable particles or contamination with germs on the way to the consumer. This loss of quality of the drinking water inevitably occurs on the way of the drinking water through the drinking water pipes to the consumer. Drinking water is often insufficiently treated in the waterworks. This applies above all to the lack of water softening by reducing the ions dissolved in drinking water.

To improve the quality of drinking water for the consumer, filter devices for treating drinking water are known. These can be interposed, for example, directly between the drinking water line and the consumer, for example at a tap. In the simplest case, such a filter device consists of a filter element. Different filter elements can provide different types of drinking water treatment. Filter devices are known from the prior art, for example, which use an activated carbon filter to reduce particles and organic compounds (herbicides, pesticides) in drinking water. Also known are filter devices with a germ filter for reducing germs in drinking water or filter devices with a reverse osmosis filter for water softening.

Furthermore, filter devices are known from the prior art, which use several different filter types for better water treatment. So is from the DE 20 2015 103 695 U1 a filter device with two parallel-connected germ filters, and a filter connected in series with these filters for water softening are known. A cleverly chosen connection of different filter types allows a better drinking water treatment and a more economical operation of the filter device. By connecting the germ filter and filter for water softening in series, it is not possible for the filter device from the prior art to set a degree of water softening by blending softened drinking water with non-softened drinking water for the needs of the consumer.

It is the object of the invention to provide a filter device for the treatment of drinking water, which overcomes the disadvantages in the prior art and in particular enables the blending of softened drinking water with non-softened drinking water.

The object is achieved by a filter device for treating drinking water according to the independent claim. Advantageous refinements form the subject of the respective subclaims.

The invention comprises a filter device for the treatment of drinking water for particle filtration, water softening or germ reduction. The filter device comprises an activated carbon filter and a reverse osmosis filter system. The active carbon filter and the reverse osmosis filter system are each connected to one another via a common inflow line and outflow line such that the activated carbon filter and the reverse osmosis filter system are flowed through in parallel by the water supplied. The parallel connection of the activated carbon filter with the reverse osmosis filter system allows an adjustable treatment of the drinking water given by the different filter effect of the activated carbon filter and the reverse osmosis system. Complete demineralization due to the reverse osmosis system is thus avoided.

It is particularly preferred if the drain line comprises a first drain line section connected to the activated carbon filter and a second drain line section connected to the reverse osmosis filter system, as well as a third drain line section. The first drain line section and the second drain line section are connected to the third drain line section via at least one drain valve. The ratio of the drinking water flow coming from the first drain line section to the drinking water flow coming from the second drain line section into the third drain line section can be regulated by the at least one drain valve.

It is also advantageous if the drain valve is a blending valve. A blending valve is an automatically operating mixing valve for drinking water systems.

According to an advantageous aspect, the activated carbon filter has an average pore diameter between 0.1 nm and 100 nm. The activated carbon used is a porous, fine-grained carbon with a large inner surface, which is suitable as an adsorbent.

The reverse osmosis filter system advantageously comprises a reverse osmosis filter, an upstream pre-pump and an upstream pre-filter. The backing pump is a pump for Pressure increase, especially a diaphragm pump or a piston pump. The pre-filter is a particle filter, in particular an activated carbon filter, gravel filter, stone filter, plastic filter, metal filter or sand filter, as well as a combination of the filter types mentioned.

The backing pump also advantageously generates a pressure between 3 bar and 40 bar. The pressure is set higher than the osmotic pressure of the drinking water.

It is particularly preferred if the drain line is connected to a consumer. The reverse osmosis filter system is connected to a concentrate drain line, which is connected to a consumer drain line of the consumer. The concentrate obtained in the reverse osmosis filter system is advantageously discharged via the consumer drain line of the consumer. For example, the consumer can be a faucet.

It is particularly advantageous if the concentrate drain line is connected to a concentrate drain line valve.

A first filter drain valve is preferably arranged downstream of the activated carbon filter. The reverse osmosis filter system also includes a second filter drain valve. In this way, the drinking water flow through the activated carbon filter and the drinking water flow through the reverse osmosis filter system can be regulated.

According to an advantageous aspect, the filter device comprises a germ filter, in particular an ultraviolet light filter or an adsorption filter, on which germs contained in the drinking water are deposited by electrostatic adsorption. The germ filter is connected in series to the activated carbon filter and the reverse osmosis filter system. The germ filter can be both upstream and downstream of the activated carbon filter and the reverse osmosis filter system.

The invention is explained in more detail below with reference to the example shown in the accompanying drawing.

• 1 eine schematische Darstellung der Filtervorrichtung.

It shows:

• 1 a schematic representation of the filter device.

1 shows a filter device 100 for the treatment of drinking water, especially for particle filtration, water softening or germ reduction. The filter device comprises 100 an activated carbon filter 4 and one to the activated carbon filter 4 reverse osmosis filter system connected in parallel 5 , The active carbon filter 4 and the reverse osmosis filter system 5 with a common inflow line 1 , as well as with a common drain line 14 connected. The parallel connection of the activated carbon filter 4 with the reverse osmosis filter system 5 allows a through the different filter effect of the activated carbon filter 4 and the reverse osmosis system 5 given, adjustable treatment of the drinking water. The dashed arrow indicates the direction of flow of the drinking water through the filter device 100 on.

The activated carbon filter 4 has an average pore diameter between 0.1 nm and 100 nm.

The reverse osmosis filter system 5 a reverse osmosis filter 51 , an upstream backing pump 52 and an upstream pre-filter 53 , The backing pump shown 52 is a diaphragm pump for increasing the pressure. The pre-filter 53 is an activated carbon filter. The diaphragm pump 52 generates a pressure between 3 bar and 40 bar and is set higher than the osmotic pressure of the drinking water.

In the example shown are the first drain pipe section 12 and the second drain pipe section 13 with the third drain pipe section 10 via exactly one drain valve 8th connected. This is exactly a drain valve 8th a blending valve. Through the blending valve 8th can the activated carbon filter 4 treated drinking water with that from the reverse osmosis system 5 softened drinking water can be blended. The waste is created by the regulated ratio of the drinking water flow from the first drain pipe section 12 coming to the drinking water flow from the second drain pipe section 13 coming into the third drain pipe section 10 ,

The drain pipe 10 is with a consumer 11 connected. In the example shown, the consumer is a tap. Here is the reverse osmosis filter system 5 with a concentrate drain line 16 connected, which with a consumer drain line 15 of the consumer 11 connected is. That with the reverse osmosis filter system 5 accumulating concentrate is advantageously via the consumer drain line 15 of the consumer 11 dissipated.

The concentrate drain line 15 is with a concentrate drain line valve 17 connected.

The activated carbon filter 4 is a first filter drain valve 7 downstream. The reverse osmosis filter system also includes 5 a second filter drain valve 54 , This enables the drinking water flow through the activated carbon filter 4 , as well as the drinking water flow through the reverse osmosis filter system 5 be managed. In the example shown is the first filter drain valve 7 and the second filter drain valve 54 Solenoid valves.

The filter device includes an optional germ filter 9 , The germ filter is shown in the illustration 9 an ultraviolet light filter. The germ filter 9 is the activated carbon filter 4 and the reverse osmosis filter system 5 connected in series. The germ filter 9 is the activated carbon filter in the example shown 4 and the reverse osmosis filter system 5 upstream. In an alternative arrangement, the germ filter can be the activated carbon filter 4 and the reverse osmosis filter system 5 downstream.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202015103695 U1 [0004]

Claims (10)

Filter device (100) for the treatment of drinking water for particle filtration, water softening or germ reduction, the filter device (100) comprising an activated carbon filter (4) and a reverse osmosis filter system (5), and wherein the active carbon filter (4) and the reverse osmosis filter system (5) each have one common inflow line (1) and outflow line (14) are connected to one another in such a way that activated carbon filter (4) and reverse osmosis filter system (5) are flowed through in parallel by the water supplied. Filter device (100) after Claim 1 , wherein the drain line (14) comprises a first drain line section (12) connected to the activated carbon filter (4) and a second drain line section (13) connected to the reverse osmosis filter system (5), and a third drain line section (10), the first drain line section (12 ) and the second drain line section (13) are connected to the third drain line section (10) via at least one drain valve (8). Filter device (100) after Claim 2 , wherein the drain valve (8) is a blending valve. Filter device (100) according to any one of the preceding claims, wherein the activated carbon filter (4) has an average pore diameter between 0.1 nm and 100 nm. Filter device (100) according to one of the preceding claims, wherein the reverse osmosis filter system (5) comprises a reverse osmosis filter (51), an upstream backing pump (52) and an upstream upstream filter (53). Filter device (100) after Claim 5 , The backing pump (52) being designed to generate a pressure between 3 bar and 40 bar. Filter device (100) according to one of the preceding claims, wherein the drain line (14) is connected to a consumer (11), and wherein the reverse osmosis filter system (5) is connected to a concentrate drain line (16) which is connected to a consumer drain line (15) of the consumer (11) is connected. Filter device (100) after Claim 7 , A concentrate drain line valve (17) being arranged on the concentrate drain line (16). Filter device (100) according to one of the preceding claims, wherein a first filter drain valve (7) is arranged on the first drain line section (12), and wherein the reverse osmosis filter system (5) comprises a second filter drain valve (54). Filter device (100) according to one of the preceding claims, comprising a germ filter (9), in particular an ultraviolet light filter or an adsorption filter, which is designed such that germs contained in the drinking water are deposited by electrostatic adsorption, and wherein the germ filter (9) the activated carbon filter (4) and the reverse osmosis filter system (5) is arranged in a row.

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