DE102018100640A1 - Filter element for installation in a filter device - Google Patents

Abstract

The present invention discloses a filter element (1) for installation in a filter device (100) for the filtration of oil, wherein the filter element (1) is characterized by the following features:
- The filter element (1) has at least two fold lines (11, 12, 13, 14), around which the filter element (1) is foldable;
- The at least two fold lines (11, 12, 13, 14) are at least partially not parallel to each other;
a starting point (15) of a first fold line (11) coincides with a starting point (15) of a second fold line (12), and an end point (16) of the first fold line (11) coincides with an end point (16) of the second fold line (16) 12) together;
- The filter element (1) has a first filter surface (41), a second filter surface (42) and a third filter surface (43);
- The first filter surface (41) is bounded by a first peripheral edge (21) of the filter element (1) and by the first fold line (11);
- The second filter surface (42) is bounded by a second peripheral edge (22) of the filter element (1) and by the second fold line (12); and
- The third filter surface (43) is bounded by the first fold line (11) and by the second fold line (12).
Furthermore, the present invention discloses a filter device (100) with a correspondingly formed filter element (1).

Description

The present invention relates to a filter element for installation in a filter device for filtering oil for a motor or a transmission, wherein the filter device may be part of a suction filter and / or part of a pressure filter.

For filtering oil in engines and gearboxes filter devices are used, which may be part of a suction filter or part of a pressure filter. In the case of suction filters, a pump is arranged on a filter outlet opening of the filter device, wherein the pump sucks the oil to be filtered by means of negative pressure through a filter element or through a filter medium. It is common to place a suction filter, which may also be referred to as a suction oil filter device, directly in an oil sump of an oil pan, with all the oil to be filtered flowing through this suction oil filter device. The associated filter housing of a filter device usually has an upper shell and a lower shell, wherein a filter element or a filter medium is clamped between the upper shell and the lower shell. An appropriately designed filter device is also referred to as a pocket filter or bag filter device.

Especially at low temperatures of the oil to be filtered, this has a high viscosity. However, even in the starting phase of an engine in which the oil to be filtered usually has a low temperature and thus high viscosity, a Mindestvolumenölstrom be ensured by the filter device to achieve adequate lubrication of a motor or a transmission.

In filter devices known from the prior art filter elements are installed, which are arranged between the lower shell and the upper shell of the filter housing and are folded so that the edge regions of the filter element are pressed towards each other by means of the lower shell and the upper shell. In this case, the superposed surfaces of a filter element in their contact areas at an acute angle to each other, so that thereby deteriorate the flow properties of the oil to be filtered in this area of the filter bag in terms of the differential pressure, whereby a correspondingly designed filter device achieves a relatively low filtration performance.

The present invention has for its object to provide a filter element for installation in a filter device for the filtration of oil, wherein by means of the filter element, the differential pressure of the filter device is reduced, so that the filter device has an improved filtration performance even at low temperatures of the oil to be filtered.

The object underlying the present invention is achieved by a filter element having the features of claim 1. Advantageous embodiments of the filter element are described in the dependent of claim 1 claims.

More specifically, the object of the present invention is achieved by a filter element for installation in a filter device for the filtration of oil, wherein the filter element has at least two fold lines around which the filter element is foldable. In this case, the at least two fold lines are at least partially not parallel to one another, wherein a starting point of a first fold line coincides with a starting point of a second fold line, and wherein an end point of the first fold line coincides with an end point of the second fold line. The filter element according to the invention thus has a first filter surface, a second filter surface and a third filter surface, wherein the first filter surface by a first peripheral edge of the filter element and by the first fold line, the second filter surface by a second peripheral edge of the filter element and by the second fold line, and the third filter surface are delimited by the first fold line and by the second fold line.

A filter device equipped with the filter element according to the invention has a reduced differential pressure, so that the filter device equipped with the filter element according to the invention has an improved filtration performance even at low temperatures of the oil to be filtered. Because the angle between the third filter surface and the first filter surface and between the third filter surface and the second filter surface are increased, thereby improving the flow properties of the oil to be filtered in these areas of the filter pocket with respect to the differential pressure, whereby a correspondingly designed filter device has an improved filtration performance.

The filter element is preferably formed flat prior to folding about the at least two fold lines.

The fold lines are preferably formed by a dilution of the filter element, ie by a dilution of the filter element material along the fold lines. Further preferably, the fold lines are formed by a force application by means of a material edge, which has the shape of the corresponding fold line. The fold lines can also be referred to as folding edges.

By bending or folding of the filter element to the first fold line and the second fold line arise three filter surfaces, namely the first filter surface, the second filter surface and the third filter surface. The three filter surfaces close together in each case an angle, which is different from 0 °, when the filter element is bent or folded in around the fold lines and is installed in a filter device.

In the installed state of the filter element in the filter device, the mutually adjacent filter surfaces preferably enclose an angle of more than 30 ° with one another. Further preferably, in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces together form an angle of more than 40 °. Further preferably, in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces together form an angle of more than 50 °. Further preferably, in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces together form an angle of more than 60 °. Further preferably, in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces together form an angle of more than 70 °. Further preferably, in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces together form an angle of more than 80 °. Further preferably close in the installed state of the filter element in the filter device, the mutually adjacent filter surfaces with each other at an angle of 90 ° with each other.

Preferably, the filter element has more than two fold lines. Thus, the filter element then also has more than three filter surfaces. If the filter element has n fold lines, then the filter element has filter surfaces corresponding to n + 1.

The filter element is preferably single-layered. Further preferably, the filter element is multi-layered, in particular double-layered or three-layered.

Preferably, the filter element is designed such that the starting points of the first fold line and the second fold line lie on a first material edge of the filter element and the end points of the first fold line and the second fold line lie on a second material edge of the filter element.

By a corresponding design of the filter element whose folding and subsequent clamping in a filter device is possible in a simplified manner.

Preferably, the second material edge of the first material edge is arranged opposite.

Further preferably, the filter element is designed such that the filter element has a passage opening arranged in the first filter surface.

Further preferably, the filter element is designed such that the first fold line and / or the second fold line is / are arcuate.

Further preferably, the filter element is formed such that the first fold line and / or the second fold line has / have at least two straight partial lines, which merge into each other and enclose an angle with each other.

By a corresponding design of the filter element, this can improve a geometry of a filter device, more precisely adapt an internal geometry of a filter device in which the filter element is installed or to be installed.

Further preferably, the filter element is designed such that the first filter surface and the second filter surface are mirror-symmetrical to each other.

Further preferably, the filter element is formed such that the first fold line and the second fold lines are mirror-symmetrical to each other.

Furthermore, the present invention has the object to provide a filter device whose differential pressure is reduced, so that the filter device according to the invention has an improved filtration performance even at low temperatures of the oil to be filtered.

This object of the present invention is achieved by a filter device having the features of claim 8. Advantageous embodiments of the filter device are described in the dependent of claim 8 claims.

More specifically, the object underlying the present invention is achieved by a filter device for filtering oil with a filter housing having a lower shell with a filter inlet opening and an upper shell with a Filterauslassöffnung, wherein the filter device comprises a filter element described above. In this case, the filter element is folded along its at least two fold lines, so that the first filter surface of the filter inlet opening and the second filter surface of the filter outlet opening are arranged opposite one another. Further, the filter element is sandwiched between the upper shell and the lower shell and folded such that the first peripheral edge and the second peripheral edge of the filter element are arranged one above the other and are pressed towards each other by means of the upper shell and the lower shell.

The filter device according to the invention has a reduced differential pressure, so that the filter device has an improved filtration performance even at low temperatures of the oil to be filtered. Because the angle between the third filter surface and the first filter surface and between the third filter surface and the second filter surface are increased, thereby improving the flow properties of the oil to be filtered in these areas of the filter pocket with respect to the differential pressure, whereby a correspondingly designed filter device has an improved filtration performance.

The mutually adjacent filter surfaces preferably enclose an angle of more than 30 ° with one another. Further preferably, the filter surfaces adjacent to each other enclose an angle of more than 40 ° with each other. Further preferably, the mutually adjacent filter surfaces enclose an angle of more than 50 ° with each other. Further preferably, the mutually adjacent filter surfaces enclose an angle of more than 60 ° with each other. Further preferably, the mutually adjacent filter surfaces enclose an angle of more than 70 ° with each other. Further preferably, the mutually adjacent filter surfaces enclose an angle of more than 80 ° with each other. Further preferably, the mutually adjacent filter surfaces form an angle of 90 ° with each other.

Preferably, the filter device is designed such that in a folded state of the filter element, in which the filter element is folded around the first fold line and the second fold line, the first filter surface with third filter surface include an angle of more than 45 °.

Further preferably, the filter device is designed such that the filter housing has at least one support element, wherein the third filter surface is in direct contact with the at least one support element.

By a corresponding design of the filter device, the geometry of the folded filter element within the filter device is stable, in particular in a flow-through state, ie during operation of the filter device.

The filter device is preferably part of a suction filter. Further preferably, the filter device is part of a pressure filter.

• 1: eine Draufsicht auf ein schematisch dargestelltes Filterelement gemäß einer ersten Ausführungsform der vorliegenden Erfindung in einem nicht gebogenen Zustand;
• 2: eine perspektivische Darstellung des in 1 dargestellten Filterelements in einem gefalteten Zustand, in dem das Filterelement um eine erste Faltlinie und um eine zweite Faltlinie gebogen ist;
• 3: eine Querschnittsdarstellung einer schematisch dargestellten Filtervorrichtung gemäß einer ersten Ausführungsform der vorliegenden Erfindung;
• 4: eine Vergrößerung der in 3 dargestellten Filtervorrichtung im Bereich der dritten Filterfläche des Filterelements;
• 5: eine schematische Darstellung des Filterelements in einem Kontaktbereich des Filterelements mit Stützelementen der Filtervorrichtung;
• 6: eine Draufsicht auf ein schematisch dargestelltes Filterelement gemäß einer zweiten Ausführungsform der vorliegenden Erfindung in einem nicht gebogenen Zustand; und
• 7: eine Querschnittsdarstellung einer schematisch dargestellten Filtervorrichtung mit einem in dieser verbauten Filterelement gemäß der zweiten Ausführungsform in einem Kontaktbereich der dritten Filterflächen mit Stützelementen der Filtervorrichtung.

Further advantages, details and features of the invention will become apparent from the illustrated embodiments. In detail:

• 1 FIG. 2 is a plan view of a schematically illustrated filter element according to a first embodiment of the present invention in a non-bent state; FIG.
• 2 : a perspective view of the in 1 illustrated filter element in a folded state, in which the filter element is bent about a first fold line and a second fold line;
• 3 a cross-sectional view of a schematically illustrated filter device according to a first embodiment of the present invention;
• 4 : an enlargement of the in 3 shown filter device in the region of the third filter surface of the filter element;
• 5 a schematic representation of the filter element in a contact region of the filter element with support elements of the filter device;
• 6 FIG. 4 is a plan view of a schematically illustrated filter element according to a second embodiment of the present invention in a non-bent state; FIG. and
• 7 : A cross-sectional view of a filter device shown schematically with a built-in this filter element according to the second embodiment in a contact region of the third filter surfaces with support elements of the filter device.

In the following description, like reference numerals designate like components and like features, so that a description made with respect to a figure with respect to a component also applies to the other figures, so that a repetitive description is avoided. Furthermore, individual features described in connection with one embodiment may also be used separately in other embodiments.

1 shows a plan view of a schematically illustrated filter element 1 according to a first embodiment of the present invention, wherein the filter element 1 is shown in a non-bent state, so that the filter element 1 is plane, therefore it runs in one plane.

The filter element 1 is for installation in a filter device 100 formed, wherein the filter device 100 in 3 is shown. The filter element 1 according to the first embodiment of the present invention has at least two fold lines 11 . 12 on to the the filter element 1 is foldable. In the illustrated embodiment, a first fold line 11 and a second fold line 12 arcuate and mirror-symmetrical to each other. Due to the arcuate configuration of the first fold line 11 and the second fold line 12 run the first fold line 11 and the second fold line 12 partly not parallel to each other. More specifically, the first fold line run 11 and the second fold line 12 only in their respective vertices parallel to each other.

How out 1 can be seen dropping starting points 15 the first fold line 11 and the second fold line 12 together. The same applies to endpoints 16 the first fold line 11 and the second fold line 12 , because also the endpoints 16 the first fold line 11 and the second fold line 12 fall together. Furthermore, it is off 1 you can see that the starting points 15 the first fold line 11 and the second fold line 12 on a material edge 31 of the filter element 1 lie. The endpoints 16 the first fold line 11 and the second fold line 12 lie on a second edge of material 32 , wherein the second material edge 32 the first material edge 31 is arranged opposite.

The filter element 1 is from a first perimeter 21 and from a second perimeter 22 limited. In this case, the first peripheral edge runs 21 from the starting point 15 in the illustrated embodiment U-shaped to the end point 16 , The second perimeter 22 also runs from the starting point 15 to the endpoint 16 U-shaped, however, is mirror-symmetrical to the first peripheral edge 21 educated.

With regard to the geometry of the filter element 1 However, according to the invention, there are no restrictions. Thus, the in 1 illustrated geometry of the filter element 1 only as an example. The circulation edges 21 . 22 of the filter element 1 can also have other geometry.

This in 1 illustrated filter element 1 has a first filter surface 41 on, passing through the first perimeter 21 and through the first fold line 11 is limited. Furthermore, the filter element 1 a second filter surface 42 on, passing through the second perimeter 22 and through the second fold line 12 is limited. Furthermore, the filter element 1 a third filter surface 43 on through the first fold line 11 and through the second fold line 12 is limited.

Furthermore, the filter element 1 one in the first filter surface 41 arranged passage opening 50 on. The passage opening 50 is usually via a filter inlet opening 121 one in 3 shown filter device 1 arranged so that oil to be filtered through the passage opening 50 and the filter inlet opening 121 in an interior of the filter device 100 can be transported. The further operation and the further structure of the filter device 100 will be below with reference to the 3 to 5 and 7 described.

By bending or folding of the filter element 1 around the first fold line 11 and the second fold line 12 the angles of the filter surfaces change 41 . 42 . 43 to each other. The three filter surfaces 41 . 42 . 43 each enclose an angle other than 0 ° when the filter element is folded around the fold lines and in a filter device 100 is installed.

2 shows a perspective view of the in 1 shown filter element 1 in a folded state, in which the filter element 1 around the first fold line 11 and a second fold line 12 is bent. It can be seen that the first filter surface 41 and the second filter surface 42 essentially parallel to each other. The third filter surface 43 however, it is substantially perpendicular to both the first filter surface 41 as well as to the second filter surface 42 ,

Furthermore, it is off 2 it can be seen that in the bent state of the filter element 1 the first peripheral edge 21 parallel to the second peripheral edge 22 runs.

3 shows a cross-sectional view of a filter device shown schematically 100 according to a first embodiment of the present invention. The filter device 100 for filtration of oil has a filter housing 110 on, that's a lower shell 111 and a top shell 112 having. The filter housing 110 also has a filter inlet opening 121 on that in the lower shell 111 is provided, and a Filterauslassöffnung 122 on top of that in the top shell 112 is provided on.

The filter device 100 also has a filter element 1 in the bent state, in which the filter element 1 around the first fold line 11 and the second fold line 12 is bent so that the first filter surface 41 the filter inlet opening 121 and the second filter surface 42 the filter outlet 122 are arranged opposite one another. Here is the filter element 1 sandwiched between the lower shell 111 and the upper shell 112 positioned and folded that the first perimeter 21 and the second perimeter 22 of the filter element 1 are arranged one above the other and by means of the lower shell 111 and the upper shell 112 pressed against each other, so that within the filter housing 110 one through the filter element 1 formed filter bag is formed.

It can be seen that the passage opening 50 of the filter element 1 with the filter inlet opening 121 of the filter housing 110 coincides so that over the passage opening 50 and the filter inlet opening 121 Oil in through the filter element 1 formed filter bag can be transported. Oil can, for example, via the passage opening 50 and the filter inlet opening 121 by generating negative pressure at the filter outlet opening 122 in the filter bag and thus in an interior of the filter housing 110 be sucked in. By a corresponding suction of oil in the filter bag, the folded filter element expands 1 out.

Out 3 It can also be seen that the filter housing 110 several first support elements 131 having, wherein the third filter surface 43 of the filter element 1 with the plurality of first support elements 131 is in direct contact. The filter housing 110 also has a plurality of second support elements 132 on, on inner surfaces of the lower shell 111 and the upper shell 112 are arranged. Here is the first filter surface 41 partially with the second support elements 132 attached to the lower shell 111 are formed, in direct contact, and the second filter surface 42 stands with second support elements 132 on the upper shell 112 are trained, in direct contact.

It can be seen that the oil flow S inside the filter housing 110 and within the filter bag, in particular in the region of the third filter surface 43 of the filter element 1 is improved. Thus, the filtration performance is by means of the filter element 1 especially in the area of the filter outlet opening 122 improved, because the third filter surface 43 of the filter element 1 is in the area of the filter outlet opening 122 arranged. Consequently, the filter device 100 a reduced differential pressure and therefore has an improved filtration performance of oil in a starting phase of a motor vehicle, in which the oil has an increased viscosity.

4 shows an enlargement of the in 3 shown filter device 100 in the area of the third filter surface 43 of the filter element 1 , 5 again shows a schematic representation of the filter element 1 in a contact region of the filter element 1 with the first support elements 131 of the filter housing 110 , It can be seen that the first support elements 131 are formed and positioned so that they are the shape of the third filter surface 43 Trace so that even with an oil flow through the through the filter element 1 formed filter bag the shape of the third filter surface 43 remains essentially unchanged.

6 shows a plan view of a schematically illustrated filter element 1 according to a second embodiment of the present invention in a non-bent state. The filter element 1 according to the second embodiment differs from the filter element 1 according to the first embodiment in that the filter element 1 according to the second embodiment, four fold lines 11 . 12 . 13 . 14 having. This shows each of the fold lines 11 . 12 . 13 . 14 three sub-lines 11_1 . 12_1 . 13_1 . 14_1 on, each merge into each other and each include an angle. By an appropriate design of the filter element 1 is the third filter surface 43 segmented trained.

7 shows a cross-sectional view of a filter device shown schematically 100 with a built-in filter element 1 according to the second embodiment in a contact region of the third filter surface 43 with first support elements 131 of the filter housing. It can be seen that the third filter surface 43 due to the four fold lines 11 . 12 . 13 . 14 is divided into three sub-surfaces, which enclose with each other an angle different from 0 °. The first supporting elements 131 are shaped accordingly.

The remaining structure and the remaining operation of both the filter element 1 according to the second embodiment and the filter device 100 according to the second embodiment, same as those of the filter element 1 according to the first embodiment and the filter device 100 according to the first embodiment.

LIST OF REFERENCE NUMBERS

1

filter element

11

first folding line / first folding edge (of the filter element)

11_1

Partial line (the first fold line)

12

second fold line / second fold edge (of the filter element)

12_1

Partial line (the second fold line)

13

third folding line / third folding edge (of the filter element)

13_1

Partial line (the third fold line)

14

fourth fold line / fourth fold edge (of the filter element)

14_1

Partial line (the fourth fold line)

15

Starting point (the folding lines)

16

Endpoint (the fold lines)

21

first peripheral edge (of the filter element)

22

second peripheral edge (of the filter element)

31

first material edge of the filter element

32

second material edge of the filter element

41

first filter surface (of the filter element)

42

second filter surface (of the filter element)

43

third filter surface (s) of the filter element

50

Passage opening (of the filter element)

100

filter means

110

filter housing

111

Lower shell (of the filter housing)

112

Upper shell (of the filter housing)

121

Filter inlet opening (of the filter housing)

122

Filter outlet opening (of the filter housing)

131

(first) support member / support rib (of the filter housing)

132

(second) support element / support rib (of the filter housing)

S

Oil flow / flow direction of the oil during operation

Claims (12)

Filter element (1) for installation in a filter device (100) for the filtration of oil, wherein the filter element (1) is characterized by the following features: - The filter element (1) has at least two fold lines (11, 12, 13, 14), around which the filter element (1) is foldable; - The at least two fold lines (11, 12, 13, 14) are at least partially not parallel to each other; a start point (15) of a first fold line (11) coincides with a starting point (15) of a second fold line (12), and an end point (16) of the first fold line (11) coincides with an end point (16) of the second fold line (16) 12) together; - The filter element (1) has a first filter surface (41), a second filter surface (42) and a third filter surface (43); - The first filter surface (41) is bounded by a first peripheral edge (21) of the filter element (1) and by the first fold line (11); - The second filter surface (42) is bounded by a second peripheral edge (22) of the filter element (1) and by the second fold line (12); and - The third filter surface (43) is bounded by the first fold line (11) and by the second fold line (12). Filter element (1) after Claim 1 characterized in that the starting points (15) of the first fold line (11) and the second fold line (12) on a first material edge (31) of the filter element (1) and the end points (16) of the first fold line (11) and the second Fold line (12) lie on a second material edge (32) of the filter element (1). Filter element (1) according to one of the preceding claims, characterized in that the filter element (1) has a passage opening (50) arranged in the first filter surface (41). Filter element (1) according to one of the preceding claims, characterized in that the first fold line (11) and / or the second fold line (12) is / are arcuate. Filter element (1) according to one of the preceding claims, characterized in that the first fold line (11) and / or the second fold line (12) has / have at least two straight partial lines (11_1, 12 1) which merge into one another and at an angle lock in. Filter element (1) according to one of the preceding claims, characterized in that the first filter surface (41) and the second filter surface (42) are mirror-symmetrical to each other. Filter element (1) according to one of the preceding claims, characterized in that the first fold line (11) and the second fold lines (12) are mirror-symmetrical to one another. Filter apparatus (100) for filtering oil with a filter housing (110) having a lower shell (111) with a filter inlet (121) and an upper shell (112) with a Filterauslassöffnung (122), wherein the filter device (100) by the following features is characterized: - the filter device (100) has a filter element (1) according to one of Claims 1 to 7 on; - The filter element (1) along its at least two fold lines (11, 12, 13, 14) folded, so that the first filter surface (41) of the filter inlet opening (121) and the second filter surface (42) of the Filterauslassöffnung (122) arranged opposite are; and - the filter element (1) is sandwiched between the lower shell (111) and the upper shell (112) and folded, that the first peripheral edge (21) and the second peripheral edge (22) of the filter element (1) are arranged one above the other and by means of the lower shell (111) and the upper shell (112) are pressed towards each other. Filter device (100) after Claim 8 , characterized in that in a folded state of the filter element (1), in which the filter element (1) is folded around the first fold line (11) and around the second fold line (12), the first filter surface (41) with third filter surface (Fig. 43) enclose an angle of more than 45 °. Filter device (100) according to one of Claims 8 or 9 , characterized by the following features: the filter housing (110) has at least one support element (131); - The third filter surface (43) is in direct contact with the at least one support element (131). Suction filter with a filter device (100) according to one of Claims 8 to 10 , Pressure filter with a filter device (100) according to one of Claims 8 to 10 ,

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