DE102020200588A1 - Liquid filter - Google Patents

Abstract

The invention relates to a liquid filter (1), the liquid filter (1) having: - a housing (2) which encloses an interior (5); - a connection element (30) arranged on the housing (2) and in which an inlet (6) for a liquid and a drain (7) for the liquid are arranged; - a valve element (40); - in particular at least one magnet (8) arranged at least partially in the interior (5); wherein the valve element (40) is coupled to the connection element (30), the valve element (40) being set up to simultaneously release the inlet (6) and the outlet (7) in a first valve position (S1) and the inlet (6) in a second valve position (S2) ) and to close the drain (7) fluid-tight at the same time.

Description

Field of invention

The invention relates to a liquid filter

State of the art

Liquid filters, e.g. for separating magnetic particles, are known from the prior art. Such liquid filters are used, for example, in heating systems, e.g. for apartments and houses, and hot water flows through them. In order to prevent wear or damage to circulation pumps, valves or heat exchangers for the hot water, it can be useful to remove particles, in particular metallic particles, from the water. A liquid filter that has a magnet can be used for this purpose. Many of the particles can have magnetic properties and thus be bound to the magnet.

Such a liquid filter is from AT 13751 U1 famous.

Disclosure of the invention

The invention is based on the knowledge that the liquid filter must be cleaned after a certain period of use. This can be the case, for example, if, for example, a layer of (magnetic) particles has accumulated in the vicinity of the magnet and / or on the bottom of the housing.

It has been shown that it can make sense to open the liquid filter for cleaning purposes and to clean the interior of the liquid filter or the housing, e.g. to rinse it out under running water. In order to carry out this cleaning, it is important for safety reasons to separate the liquid filter from the liquid system, e.g. the heating circuit, e.g. by means of valves in its inlet and outlet. Otherwise hot water could flow in when the liquid filter is opened, which could injure the operator. It can happen that shut-off valves, which fluidically separate the liquid filter from the liquid system, are not arranged near the liquid filter and / or that their state (open / closed) cannot be seen from the operator's location when the liquid filter is dismantled. In addition, it is necessary to close two shut-off valves (in the supply line and in the discharge line) - such valves are usually made of metal and are therefore expensive, heavy and take up a lot of space. Depending on the space available, this can make retrofitting a liquid filter in an existing liquid system difficult and expensive.

Finally, it has been shown that a liquid filter, in which an inlet into a housing of the liquid filter and an outlet from the housing of the liquid filter are each individually connected to the supply line or the discharge line of the liquid system, are no longer changed in terms of their alignment after installation can. Sometimes the space available on site for such a liquid filter may require a complicated line layout so that the liquid filter does not have to be installed upside down or it can happen that the liquid filter is not ideally aligned if the lines are not ideally laid (e.g. with a drain opening not on the geodetically lowest point or a ventilation opening not at the geodetically highest point). This can lead to the fact that, with simple maintenance without opening the housing of the liquid filter, e.g. not all of the collected particles can be removed from the housing or that residual air remains trapped in the interior of the housing even after the housing has been vented.

There may therefore be a need to provide a liquid filter, in particular for separating magnetic particles, which can be easily and safely connected to a liquid system or a line system without the need for a complicated line routing, which continues to be simple, safe and inexpensive can be completely separated fluidically from the fluid system, ideally without having to undertake complex modifications or additions to the fluid system and ideally an operator can optically or haptically recognize whether the separation from the fluid system has taken place and which ideally enables its position in space to be corrected, without having to change the connections (supply and discharge of the liquid system) to the liquid filter.

Advantages of the invention

This need can be met by the subject matter of the present invention according to the independent claim. Advantageous embodiments of the present invention are described in the dependent claims.

According to a first aspect of the invention, a liquid filter is proposed.

The liquid filter has a housing which encloses an interior space. The liquid filter also has a connection element arranged on the housing, in which an inlet for a liquid and an outlet for the liquid are arranged. It also has a valve element, the valve element being coupled to the connection element. The valve element is set up to simultaneously release the inlet and outlet in a first valve position (open position, valve open) and to simultaneously close the inlet and outlet in a fluid-tight manner in a second valve position (closed position, valve closed or closed).

This has the advantageous effect that the liquid filter can be completely separated from the liquid system (e.g. a pipe system of a heating system) by a single element, e.g. to service the liquid filter. Operation is thereby advantageously simplified and safer. Because as soon as the valve element is moved into the second valve position, the liquid filter is completely fluidically separated from the liquid system. This significantly reduces the risk of forgetting to close one of several shut-off valves.

Furthermore, the separation of the liquid filter can advantageously be effected by an element which is connected directly to the liquid filter or which is part of the liquid filter. In this way, advantageously, no additional shut-off valves have to be installed in the liquid system or line system, or such shut-off valves do not have to be installed in the immediate vicinity of the liquid filter. Because even if the liquid filter is to be opened for maintenance purposes, no liquid continues to flow out of the lines due to the valve element coupled to the connection element (when it is in its second valve position). This advantageously also shortens the duration of maintenance, since not all of the line sections of the liquid system or of the line system need to run empty up to the shut-off valves. This also makes it possible to work advantageously with smaller-sized collecting containers for the liquid. If shut-off valves are present in the lines, the invention advantageously creates a redundancy against leakage or liquid escaping during maintenance.

Finally, the inlet and outlet are brought together in the connection element or arranged there together, which advantageously simplifies connection of the liquid filter to the liquid system or line system and a subsequent correction of the position of the liquid filter in the room can advantageously be carried out easily without having to relocate the lines of the pipeline system.

The liquid filter can, for example, have at least one magnet arranged at least partially in the interior.

The inlet can, for example, be an inlet for the liquid to be cleaned into the interior of the housing. It can, for example, be designed as an opening, for example channel-like, in a wall of the housing. The drain can, for example, be a drain of purified liquid from the interior of the housing. It can, for example, be designed as a further opening, for example channel-like, in the wall of the housing.

The liquid filter can be suitable, for example, for separating magnetic particles. It can also be set up to separate magnetic particles or to bind them from the liquid. Magnetic particles are to be understood as meaning those particles that can be attracted by a magnet, e.g. a permanent magnet or an electromagnet.

In the context of this application, the term “comprising” is used synonymously with the term “comprising”, unless otherwise described.

The housing can be designed, for example, with a first housing part and with a second housing part, which can be releasably closed to one another in a fluid-tight manner, e.g. by means of a screw connection or a bayonet connection or a clip connection. The first housing part can, for example, be cup-shaped. It can be closed with the second housing part, which can be designed as a cover, for example. The housing can, for example, be designed as a hollow cylinder. It can extend along a longitudinal axis of the housing. The housing longitudinal axis can be an axis of symmetry of the housing. The housing longitudinal axis can extend from a base of the housing to the cover.

The direction of flow of the liquid through the inlet or through the outlet can define an axial direction. A radial direction is perpendicular to the axial direction. A direction of rotation revolves around the axial direction.

The liquid filter can, for example, have a housing shell which at least partially surrounds the housing from the outside. The housing shell can, for example, be cup-shaped. Like a second housing wall, it can surround the housing, at least in sections or in part. For example, it can be provided that the housing shell is detachably attached to the housing. The term “releasable” means that a connection can be released without being destroyed. For example, it can be provided that in a state with the housing shell mounted on the housing, a closure element of the housing is e.g. not freely accessible or is (mechanically, electrically or magnetically) blocked or covered.

It can be provided that the housing has a pocket protruding into the interior, wherein the magnet can be attached to the housing shell, for example. The magnet can, for example, be arranged in the pocket in a state in which the housing shell is mounted on the housing.

For example, provision can be made for a drain opening to be provided in the housing (e.g. in a drain section). It can be provided, for example, that the drain opening can be closed in a fluid-tight manner with a drain plug that can be operated from the outside. It can be provided, for example, that the outlet section protrudes through a through opening in the housing shell into an external environment of the liquid filter. As an alternative or in addition, it can likewise be provided, only by way of example, that the drain plug protrudes through the through opening of the housing shell from the outside inward to the drain section. By way of example only, it can be provided that the drain plug prevents the housing shell from being removed from the housing when it is coupled to the drain opening. For example, it can be provided that the drain opening has a significantly smaller diameter (at least a factor of 3 smaller) than the diameter of the housing (the opened housing does not represent the drain opening).

For example, it can be provided that opening the housing is made more difficult when the housing shell is mounted. The difficulty relates to a state in which the housing shell is not mounted on the housing or in which it does not surround the housing.

It can be provided that the drain lock is designed with a screw and / or a bayonet lock and / or a clip connection.

The fact that the valve element is movably mounted in or on the connection element advantageously has the effect that the functions of fluidic connection of supply line and discharge line to inlet and outlet as well as fluidic separation or releasing of the liquid filter from the liquid system are arranged in a single assembly . In this way, the liquid filter (including the connection and shut-off function) can be particularly compact. The connection element also advantageously serves as a bearing for the valve element, so that no additional valve housing is necessary.

The valve element can, for example, be rotatably or displaceably mounted in or on the connection element.

It is advantageously provided that the valve element can be displaced from the first valve position (valve open) into the second valve position (valve closed or closed) by rotation in a first direction of rotation. The valve element can, for example, be designed to be reversibly rotatable. That is, by rotating in a second direction of rotation, which is opposite to the first direction of rotation, the valve element can be shifted from the second valve position into the first valve position.

For example, the first direction of rotation and the second direction of rotation can take place in the direction of rotation around the axial direction. The first direction of rotation can e.g. be clockwise, the second direction counterclockwise (or vice versa).

However, it can alternatively or additionally also be provided, for example, that the valve element is transferred from the second valve position to the first valve position by rotating it further in the first direction of rotation. It can be provided that the valve element can be rotated through 360 ° and, when rotated through 360 °, the first valve position is reached at least once with the simultaneous release of the inlet and outlet and at least once the second valve position in which the inlet and outlet are closed at the same time . Depending on the configuration, a first state can also be brought about several times with a rotation through 360 °, in which the inlet and outlet are released simultaneously (corresponds to the first valve position) and / or a second state can be brought about several times in which the inlet and outlet are fluidically closed at the same time are (corresponds to the second valve position)

Due to a rotatable design, the connection element and valve element can advantageously be designed to be particularly compact, as a result of which the valve element can be opened and closed even in confined spaces.

Alternatively, it can be provided that the valve element can be displaced from the first valve position (valve open) into the second valve position (valve closed or closed) by a displacement along a first displacement direction. The valve element can, for example, be designed to be reversible (linearly) displaceable. That is, by a displacement in a second displacement direction, which is opposite to the first displacement direction, the valve element can be displaced from the second valve position into the first valve position.

As a result, it can advantageously be recognized in a particularly simple manner whether the valve is open (first valve position) or closed (second valve position).

In a further development, it is provided that the connection element has a connection geometry which enables the liquid filter to be mounted in at least three different orientations on a liquid system that can be connected to the connection element. This advantageously has the effect that, even if the installation position of the liquid filter liquid system is initially unfavorable, a subsequent correction of the position or location of the liquid filter is possible without the need to re-assemble the feed line and / or the discharge line of the liquid system or line system again . In this way, a position can also advantageously be found in confined spaces in which the liquid filter can be mounted or positioned in the space available. For this purpose, a corresponding or complementary mating connection geometry can be attached to the liquid system (connected to the supply line and discharge line), with which the connection geometry of the connection element can be coupled. After the desired position has been established, the interface between the connection geometry and the mating connection geometry can be closed in a fluid-tight manner, for example by means of a union nut or another connecting means.

The connection geometry can, for example, be inserted, attached, attached, plugged in, plugged in, etc. in or on or on the mating connection geometry.

For example, the connection geometry of the connection element can be designed to be rotationally symmetrical, for example circular. However, it can also be a polygonal connection geometry, e.g. a triangle, square, pentagon, hexagon, etc.

This also ensures that only liquid filters that are approved and suitable for the purpose can be connected to the liquid system (poka-yoke solution).

Because the valve element is made from a material which for the most part (more than 50%) comprises plastic, a particularly inexpensive and easy to manufacture valve element is advantageously provided. Such a valve element is also advantageously particularly resistant to corrosion. Plastic also advantageously insulates well against heat, so that the valve element can also be moved or displaced, e.g. with bare hands, when the liquid is at a high temperature, e.g. more than 60 ° C.

In a development it is provided that the connection element has a cup-like shape with a first base and a first wall protruding from the first base along an axial direction, the first wall running around the first base along a circumferential direction around the axial direction, the first Wall has at least one recess along the direction of rotation, the at least one recess extending over an angular range of at least 15 ° along the direction of rotation. The recess preferably extends over at least 30 °, particularly preferably over at least 45 ° and very particularly preferably over at least 60 °. For example, it extends over 90 ° or 100 °. The recess can be an area or section in which the first wall does not have the same height as in the non-recessed areas. For example, the height of the first wall in the area of the recess is reduced by at least 30%, preferably by at least 50%, compared to the normal height.

The first wall can, for example, rise at least 2mm above the first floor, preferably at least 4mm, particularly preferably at least 6mm and very particularly preferably at least 15mm above the first floor - this elevation corresponds to the height of the first wall.

The first wall can have a wall thickness of, for example, at least 2mm, preferably at least 3mm and particularly preferably at least 4mm.

The cup-shaped design with a first base and first wall advantageously has the effect that the connection element has a unique geometry, so that only corresponding counter-geometries can be connected to the connection element (provided that no fixing element, e.g. in the form of a cover, closes the connection element). This also has the effect that, for example, the valve element can be accommodated in the space enclosed by the first floor and first wall. It can be stored in the cup-like shape and thus held stationary along the radial direction. The recess has the advantageous effect that, on the one hand, it can be determined optically or haptically in which valve position the valve element is when the valve element is mounted in the connection element. The recess can, however, also enable the valve element to be operated or moved from the outside.

When using a linearly displaceable valve element, for example, two recesses opposite one another can also be provided.

The first base can, for example, be attached to a wall of the housing or can be formed in one piece with the wall of the housing. The first wall can, for example, point away from the housing with a free (distal) end.

As a rule, the axial direction of the first tray will coincide with the axial direction of the liquid flowing through the inlet and / or outlet (this is also assumed in this application, unless explicitly stated otherwise). However, there may be cases when this is not the case. A distinction would then have to be made between an axial, radial and circumferential direction with respect to the base and an axial, radial and circumferential direction with regard to the direction of flow in the inlet and outlet.

It goes without saying that the connection element can have a fixing element on the side facing away from the first base. This can act or be designed, for example, in the manner of a cover. For example, it can seal off the connection element in a fluid-tight manner to an outer space or an outer environment of the liquid filter. The fixing element can, for example, be detachably attached to the first base and / or to the first wall. For example, it can have the connections to the supply line and the discharge line and thus represent the connection to the interface (s) to the fluid system. In this case, the fixing element can have the connection geometry or can be regarded as belonging to the connection element.

The fact that the inlet is designed as an inlet opening and the outlet as an outlet opening in the first base has the advantageous effect that the liquid filter is particularly compact. This can also advantageously have the effect that the liquid filter can be connected to the supply line and the discharge line in various positions in a particularly simple manner.

In a further development it is provided that the valve element has a closure element, the closure element being formed essentially (e.g. +/- 5 °) parallel to the first base, a first through opening and a second through opening being formed in the closure element. In this case, in the first valve position, the first through opening at least partially overlaps the inlet opening and the second through opening at least partially overlaps the outlet opening. In the second valve position, the first through-opening and the second through-opening overlap neither with the inlet opening nor with the outlet opening. In the second valve position, the first and second passage openings are thus neither connected to the inlet nor to the outlet in a fluid-conducting manner.

This advantageously provides a particularly simple, safe and inexpensive valve element with which the inlet and outlet are either released or shut off at the same time.

In a further development, it is provided that, viewed in the circumferential direction, the first base of the connection element can be divided into a first quadrant, a second quadrant, a third quadrant and a fourth quadrant, the drain opening being arranged in the first quadrant and the inlet opening being arranged in the third quadrant , with the first quadrant and the third quadrant facing each other. For example, the four quadrants are separated from one another by a Cartesian coordinate system (i.e. two mutually perpendicular axes).

This has the advantageous effect that an optimal use of space is created with the largest possible area for inlet and outlet and at the same time a safe and reliable function of simultaneous opening (first valve position) or simultaneous closing (second valve position) of inlet and outlet is achieved.

In a further development it is provided that the valve element has a cup-like shape with a second base and with a second wall protruding from the second base and encircling the second base, the valve element being received radially inside the first wall of the connection element, the second wall with its free end, viewed in the axial direction, faces away from the first base.

This advantageously has the effect that the connection element and valve element are particularly compact. The first wall can cause a guide for the valve element, in the sense that at least one spatial degree of freedom of the valve element is limited by the first wall (e.g. a displacement along the radial direction). This can lead to improved tightness.

The second wall can, for example, be designed to be closed all round.

The second wall can, for example, rise by at least 2mm above the second floor, preferably by at least 4mm, particularly preferably by at least 6mm and very particularly preferably by at least 15mm - this elevation corresponds to the height of the second wall.

The second wall can have a wall thickness of, for example, at least 2mm, preferably at least 3mm and particularly preferably at least 4mm.

The second wall has the advantageous effect that the liquid that passes through the inlet and outlet has sufficient axial space on the way to the inlet and outlet so that it is not abruptly deflected even at high flow speeds (e.g. by a flow (diversion) line in the fixing element ). In this way, noises in the connection element can advantageously be reduced.

It can be provided, for example, that the first wall forms a type of slide bearing for the second wall of the valve element.

It goes without saying that the second base can represent a closure element of the valve element.

It is advantageously provided that an operating element is arranged or formed on the second wall (e.g. in one piece with the second wall) or attached, the operating element protruding through the recess of the first wall viewed in a radial direction perpendicular to the axial direction.

This advantageously enables a particularly simple and inexpensive manual operation of the valve element. Actuation of the valve element, e.g. by means of a motor, is also possible in this case, but not necessary. In addition, the position of the control element can be used to identify in a simple manner, e.g. haptically or optically, in which valve position the valve element is located.

Figure list

Further features and advantages of the present invention will become apparent to those skilled in the art from the following description of exemplary embodiments, which, however, are not to be interpreted as limiting the invention, with reference to the accompanying drawings.

• 1: einen schematischen Querschnitt eines Flüssigkeitsfilters aus dem Stand der Technik;
• 2a: einen schematischen Querschnitt durch einen Flüssigkeitsfilter
• 2b: eine perspektivische Explosionszeichnung eines Anschlusselements des Flüssigkeitsfilters aus 2a;
• 2c: einen schematischen Längsschnitt durch das Anschlusselement aus 2b;
• 3a: eine perspektivische Seitenansicht des Anschlusselements des Flüssigkeitsfilters aus 2a mit dem Ventilelement in der ersten Ventilstellung;
• 3b: einen schematischen Querschnitt durch das Anschlusselement gemäß 3a;
• 4a: eine perspektivische Seitenansicht des Anschlusselements des Flüssigkeitsfilters aus 2a mit dem Ventilelement in der zweiten Ventilstellung;
• 4b: einen schematischen Querschnitt durch das Anschlusselement gemäß 4a.

Show it

• 1 : a schematic cross section of a liquid filter from the prior art;
• 2a : a schematic cross section through a liquid filter
• 2 B : An exploded perspective drawing of a connection element of the liquid filter from 2a ;
• 2c : a schematic longitudinal section through the connection element 2 B ;
• 3a : a perspective side view of the connection element of the liquid filter 2a with the valve element in the first valve position;
• 3b : a schematic cross section through the connection element according to FIG 3a ;
• 4a : a perspective side view of the connection element of the liquid filter 2a with the valve element in the second valve position;
• 4b : a schematic cross section through the connection element according to FIG 4a .

1 shows a schematic cross section of a liquid filter 1 from the state of the art. The liquid filter 1 has a housing 2 on that an interior 5 encloses. The case 2 has a first housing part 3 in the manner of a cover, as well as a second housing part 4th , which is designed in the manner of a cup or housing cup. The second part of the housing 4th is located with respect to the direction of gravity g in the normal installation position below the first housing part 3 . The liquid filter 1 continues to have an inlet 6th for one liquid and one drain 7th for the liquid, both at different points of the second housing part 4th are arranged, with the inlet 6th in the lower third of the second housing part 4th and the drain is in the upper third of the second housing part 4th . The inflow 6th is with a supply line 80 a fluid system 100 connected. The fluid system 100 can be a pipe system of a heating circuit, for example. The sequence 7th is with a derivative 82 of the fluid system 100 connected. The interior 5 of the housing 2 is therefore fluid-tight with respect to an external environment 90 of the liquid filter 1 completed. It goes without saying that inflow 6th and expiration 7th (and thus also the supply line 80 and derivation 82 ) can in principle also be interchanged.

In the supply line 80 is a supply valve 81 provided through which the inflow of liquid from the liquid system 100 into the liquid filter 1 can be separated. In the same way is in the derivation 82 a drain valve 83 provided with which the liquid flow from the liquid filter 1 into the fluid system 100 can be interrupted.

In the interior 5 is a magnet 8th arranged the magnetic particles 60 that occurs when the liquid passes through the interior 5 For example, due to a cyclone effect (centrifugal force separation) are deposited, can bind to itself.

At the upper end (geodetically highest point) of the first housing part 3 is a ventilation element 17th arranged. At the lower end (geodetically lowest point) of the second housing part 4th is a drain hole 10 arranged by a drain plug 11 is locked.

The direction of flow of the exit of the liquid from the drain 7th defines an axial direction here A. coming from one direction of rotation U is going around. A radial direction R. is perpendicular to the axial direction A. .

Should now the interior 5 of the liquid filter 1 cleaned, first of all are the supply valve 81 and the drain valve 83 close so that the liquid filter 1 from the fluid system 100 is separated. This is to prevent, for example, when opening the housing 2 an operator injures himself from hot liquid flowing in.

After this preparation you can open the drain plug 11 first the liquid from the liquid filter 1 be drained and then the housing 2 be opened by, for example, the second housing part 4th from the first housing part 3 is unscrewed. The two housing parts 3 , 4th can then be cleaned. Also the magnet 8th can be cleaned at the same time.

2a shows a schematic cross section through a liquid filter 1 and 2 B shows a perspective exploded drawing of a connection element 30th of the liquid filter 1 .

The liquid filter 1 has a housing 2 on that an interior 5 encloses. He also has a on the case 2 arranged connection element 30th on, in which an inlet 6th for one liquid and one drain 7th for the liquid are arranged. The case 2 furthermore has a ventilation element at its geodetically approximately highest point 17th on. The liquid filter 1 further comprises a valve element 40 on and - in this exemplary embodiment only by way of example - at least one at least partially in the interior 5 arranged magnets 8th . The valve element 40 is with the connector 30th coupled. It is set up to be in one of the here ( 2 B) illustrated first valve position S1 the inflow 6th and the process 7th to release at the same time and in a (not shown here) second valve position S2 the inflow 6th and the process 7th to close fluid-tight at the same time. It goes without saying that inflow 6th and expiration 7th can basically also be interchanged.

The valve element 40 is movable in the connection element 30th stored. In the illustrated embodiment, it is rotatably mounted.

The valve element 30th can in this embodiment of the 2 B reversible by turning in a first direction of rotation D1 from the first valve position S1 in the second valve position S2 be relocated. By turning in one direction to the first D1 opposite direction of rotation D2 can the valve element 40 from the second valve position S2 in the first valve position S1 be relocated back.

In an embodiment not shown here it can be provided that the valve element 40 , in particular reversible, by a displacement along a first displacement direction from the first valve position S1 in the second valve position S2 can be relocated.

The connection element 30th has a connection geometry that allows assembly of the liquid filter 1 on one with the connection element 30th connectable fluid system 100 made possible in at least three different orientations. In the embodiment shown, this is the connection geometry of the connection element 30th circular, so that the liquid filter can assume any position around the axis of symmetry of the connection geometry.

The valve element 40 and / or the connection element 30th and / or the housing 2 is designed here, for example, from a material which for the most part (more than 50%) comprises plastic. It can be made of polyamide (PA), for example.

Polyamides include, for example, glass fiber filled polyamide (e.g. PA66). Polypropylene (PP) is also possible. A design made of plastic is particularly inexpensive. In principle, another plastic is also possible. The use of metal or a construction made exclusively of metal is also conceivable.

The connection element 30th has a cup-like shape with a first bottom 31 and one from the first floor 31 along an axial direction A. protruding first wall 32 on, with the first wall 32 the first floor 31 along a direction of rotation U about the axial direction A. running around. The first wall 32 points along the direction of rotation U at least one recess 34 at one level of the first wall 32 from the first floor to its free end 33 is reduced, here by approx. 70%. The at least one recess 34 extends over an angular range 35 of at least 15 ° along the direction of rotation U , here along about 85 ° to 105 °.

The inflow 6th is used as an inlet opening 36 and the process 7th is as a drain opening 37 in the first floor 31 educated.

The valve element 40 has a closure element 48 on, the closure element 48 substantially parallel to the first floor 31 is formed, wherein in the closure element 48 a first through opening 46 and a second Through opening 47 are trained. In the first valve position S1 overlaps the first through opening 46 with the inlet opening 36 at least partially and overlaps the second through opening 47 with the drain opening 37 at least partially, in the second valve position S2 the first through hole 46 and the second through hole 47 neither with the inlet opening 36 still with the drain opening 37 overlap, so they are then not connected in a fluid-conducting manner.

In the direction of rotation U considered is the first floor 31 in a first quadrant Q1 , a second quadrant Q2 , a third quadrant Q3 and a fourth quadrant Q4 divisible, the quadrants Q1 , Q2 , Q3 , Q4 are arranged rotated by 90 ° to each other. The drain opening 37 is in the first quadrant Q1 and the inlet opening 36 is in the third quadrant Q3 arranged. The first quadrant Q3 and the third quadrant Q3 lie opposite each other. It goes without saying that the inlet opening 36 also in the first quadrant Q1 and the drain opening 37 in the third quadrant Q3 can be arranged.

The valve element 40 has a cup-like shape with a second bottom 41 (which here is the locking element 48 represents) and with one from the second floor 41 protruding, the second floor 41 circumferential second wall 42 . The valve element 40 is radially inside the first wall 32 of the connection element 30th added, the first wall 32 a kind of slide bearing for the second wall 42 can represent. The second wall 42 points with its free end 43 in the axial direction A. considered away from the first floor 31 . The second wall 42 is designed here to be closed all the way round and thus prevents liquid from escaping through the recess 34 .

On the second wall 42 is a control element 44 arranged, the control element 44 in one to the axial direction A. perpendicular radial direction R. viewed through the recess 34 the first wall 32 protrudes through. The control element 44 can for example be made in one piece with the second wall 42 be designed. The valve element 40 can for example be manufactured as a one-piece injection-molded element.

The valve element 40 can in the connection element 30th be kept stationary (except for the rotatability) by after a placement of the valve element 40 in the cup-like, on the housing 2 arranged part a fixing element 50 as a kind of cover on the housing 2 remote side of the connection element 30th is attached. With the fixing element 50 can, for example, the valve element 40 in the connection element 30th be fixed (along the axial direction A. ). This can be done on the connection element 30th Fasteners 38 and on the fixing element 50 further fasteners 58 be provided which can be connected to one another or can be connected to one another with the aid of fastening means (eg screws).

The fixing element 50 has three grooves on its outside by way of example only 51 (alternatively: eg a connection thread), in which eg sealing means (eg O-rings) and / or a retaining element can be arranged, so as to. a mating connection geometry fluid-tight with the liquid filter 1 connect to. For example, in the axially outermost two grooves 51 (in the 2 B furthest to the right) O-rings are placed and in the innermost groove 51 one radially outward over the groove 51 protruding retaining element (in the manner of a snap ring, eg C-shaped). In this way the liquid filter 1 with his through the connection element 30th (incl. fixing element 50 ) specified connection geometry are initially placed in or on or around a mating connection geometry. Then the fixing element 50 then connected to the mating connection geometry in a fluid-tight manner by means of a fastening means (for example a hose clamp, a union nut, or the like). For example, a union nut can then engage over the holding element and, during fixing, such an axial displacement of the mating connection geometry relative to the fixing element 50 To block. It goes without saying that other connection options can also be provided.

The feed line and the discharge line of the liquid system are in or on the mating connection geometry or a mating connection, which is not shown here 100 assembled. The fixing element 50 furthermore has a first connection for this purpose 56 for a fluid connection with the supply line and a second connection 57 for a fluidic connection with drainage. The first connection 56 is also fluidic with the inlet 6th connectable or connected and the second connection 67 is also fluidic with the process 7th connectable or connected (if the first valve position S1 is set).

About the internal tightness and the external tightness in the connection element 30th Several sealing elements have to be guaranteed 70 , 71 , 76 , 77 intended. They can, for example, be designed in the form of O-rings or as sealing cords (see also 2 B) .

An outer sealing element 70 is in the axial direction A. considered between a free end 43 the second wall 42 and the fixing element 50 intended. An inner sealing element 71 is viewed in the axial direction between the first floor 31 and the second floor 41 provided, the inner sealing element 71 preferably in a radial direction direction R. viewed on the first wall 32 is present. External sealing element 70 and inner sealing element 71 effect the external sealing of the connection element 30th . In other words, they cause no liquid to get into the outside environment 90 of the liquid filter 1 got.

An inlet sealing element 76 is on the first floor 31 , for example in a groove around the inlet opening 36 arranged around. A drain sealing element 77 is on the first floor 31 , e.g. in another groove around the drainage opening 37 arranged around. They will be along the axial direction A. also considered between first floor 31 and second floor 41 firmly pressed. Inlet sealing element 76 and drain sealing element 77 effect the internal seal. In other words, they cause no liquid from the inlet 6th in the process 7th crosses without first going through the interior 5 of the liquid filter to have been passed.

The liquid filter 1 points in the interior 5 a pocket 12th on. It also has a housing shell 20th on where the magnet 8th (releasably) attached. The housing shell 20th can on the second housing part 4th be releasably attached, for example, with a clip connection or snap-in connection. The housing shell 20th furthermore has a through opening through which a discharge section in which the discharge opening 10 is arranged, protrudes. The drain plug 11 has an oversize here compared to the through opening, so that the housing shell 20th only then from the housing 20th can be removed when the drain plug is decoupled from the drain port. The housing shell 20th can in the case 2 mounted state releasing the first housing part 3 from the second housing part 4th block or complicate.

2c shows a schematic longitudinal section through the connection element 30th of the liquid filter 1 . The connection element forms here 30th with first floor 31 , first wall 32 as well as the fixing element 50 a closed box in which the valve element 40 is arranged. The second wall 42 prevents liquid from getting out of the recess 34 into the outside environment 90 can emerge.

3a shows a perspective side view of the connection element 30th of the liquid filter 2a with the valve element 40 in the first valve position S1 . It is easy to see how the control element 44 through the recess 34 protrudes outwards. The recess 34 forms at the connection element 30th attached fixing element 50 a kind of link guide for the control element 44 so that tilting when rotating the valve element 40 is prevented.

It is conceivable that the valve element 40 on an outside of the second wall 42 and adjacent to the control element 44 on the two sides of the control element 44 has two different colors (e.g. red / green or black / white), ideally signal colors or colors with a high contrast ratio. As a result, an operator can easily and visually recognize in a safety-relevant manner whether the valve element 40 in the open first valve position S1 or in the closed second valve position S2 .

3b shows a schematic cross section through the connection element 30th according to 3a . The first, open valve position S1 is presented, layed out. Thus are inflow 6th and expiration 7th at the same time as the inlet and outlet of the fluid system 100 connected. The first through hole 46 des as a closure element 48 acting second floor 41 is with the inlet opening 36 fluidically connected (they overlap) and at the same time is the second through opening 47 with the drain opening 37 fluidically connected (they overlap). The division of the first floor is particularly good here 31 in the four quadrants Q1 , Q2 , Q3 , Q4 to recognize as well as the good use of the area of the first floor 31 for the largest possible flow openings. The circular design of the openings here also increases the risk of damage to the sealing elements 76 , 77 In addition, the change in the flow rate through the openings is increased or decreased relatively uniformly when the valve element 40 from the second valve position S2 in the first valve position S1 is relocated or vice versa.

4a shows a perspective side view of the connection element 30th of the liquid filter 2a with the valve element 40 in the second valve position S2 .

4b shows a schematic cross section through the connection element according to FIG 4a . It can be seen that the inlet is now at the same time 6th and the process 7th are fluidically separated from the supply line or the discharge line. There is no overlap of the first through opening 46 with the inlet opening 36 instead of and also no overlap between the second through opening 47 and the drain opening 37 .

The liquid filter 1 is suitable, for example, for use in heating circuits, for example for apartments and houses, the heating circuits being operated, for example, with hot water, with particles, in particular magnetic particles, from the liquid 60 should be deposited. The liquid filter 1 however, it is not limited to such applications.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely 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

• AT 13751 U1 [0003]

Claims (11)

Liquid filter, in particular for separating magnetic particles, the liquid filter having: - A housing (2) which encloses an interior space (5); - A connection element (30) arranged on the housing (2), in which an inlet (6) for a liquid and an outlet (7) for the liquid are arranged; - a valve element (40); - In particular at least one magnet (8) arranged at least partially in the interior (5); the valve element (40) being coupled to the connection element (30), the valve element (40) being set up to simultaneously release the inlet (6) and the outlet (7) in a first valve position (S1) and in a second valve position ( S2) to close the inlet (6) and the outlet (7) fluid-tight at the same time. Liquid filter according to the preceding claim, wherein the valve element (40) is movably mounted in the connection element (30), in particular is mounted rotatably or is mounted displaceably. Liquid filter according to one of the preceding claims, wherein the valve element (40), in particular reversibly, can be displaced from the first valve position (S1) into the second valve position (S2) by a rotation in a first direction of rotation (D1), or wherein the valve element (40) can be displaced, in particular reversibly, from the first valve position (S1) into the second valve position (S2) by a displacement along a first displacement direction. Liquid filter according to one of the preceding claims, wherein the connection element (30) has a connection geometry which enables the liquid filter (1) to be mounted on a liquid system (100) that can be connected to the connection element (30) in at least three different orientations, wherein the connection geometry of the connection element (30) is designed in particular to be rotationally symmetrical. Liquid filter according to one of the preceding claims, wherein the valve element (40) is designed from a material which predominantly comprises plastic. Liquid filter according to one of the preceding claims, wherein the connection element (30) has a cup-like shape with a first base (31) and a first wall (32) protruding from the first base (31) along an axial direction (A), wherein the first wall (32) runs around the first base (31) along a direction of rotation (U) around the axial direction (A), wherein the first wall (32) has at least one recess (34) along the direction of rotation (U), wherein the at least one recess (34) extends over an angular range (35) of at least 15 ° along the direction of rotation (U). Liquid filter according to the preceding claim, wherein the inlet (6) is designed as an inlet opening (36) and the outlet (7) is designed as an outlet opening (37) in the first base (31). Liquid filter according to the preceding claim, wherein the valve element (40) has a closure element (48), wherein the closure element (48) is formed essentially parallel to the first base (31), wherein a first through opening (46) and a second through opening (47) are formed in the closure element (48), wherein in the first valve position (S1) the first through opening (46) at least partially overlaps with the inlet opening (36) and the second through opening (47) at least partially overlaps with the outlet opening (37), wherein in the second valve position (S2) the first through opening (46) and the second through opening (47) each overlap neither with the inlet opening (36) nor with the drain opening (37), in particular are not connected in a fluid-conducting manner. Liquid filter according to one of the two preceding claims, wherein, viewed in the direction of rotation (U), the first base (31) can be divided into a first quadrant (Q1), a second quadrant (Q2), a third quadrant (Q3) and a fourth quadrant (Q4), wherein the drain opening (37) is arranged in the first quadrant (Q1) and the inlet opening (36) is arranged in the third quadrant (Q3), wherein the first quadrant (Q1) and the third quadrant (Q3) are opposite to each other. Liquid filter according to one of the four preceding claims, wherein the valve element (40) has a cup-like shape with a second base (41) and with a second wall (42) protruding from the second base (41) and encircling the second base (41), wherein the second wall (42) is particularly closed all round, the valve element (40) is received radially inside the first wall (31) of the connection element (30), the second wall (42) with its free end (43) pointing away from the first base (31) when viewed in the axial direction (A). Liquid filter according to the preceding claim, wherein an operating element (44) is arranged on the second wall (42), the operating element (44) viewed through the recess (34) in a radial direction (R) perpendicular to the axial direction (A) first wall (32) protrudes through it.

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