DE102022103297A1 - FILTER ELEMENT AND FILTER DEVICE - Google Patents

Abstract

The present invention provides a filter element comprising a filter media and a filter base; wherein the filter base is provided with sealing end caps on both face sides, the respective end caps being configured in a closed arrangement to enclose the cleaning cavity at least after assembly at the respective face sides of the filter base. The filter base is provided with an air outlet communicating with the cleaning cavity, and the air outlet faces a U-shaped open end of the filter media. At least one air inlet is formed between the side walls of the two end caps avoided on one side of the air outlet, and the air inlet is annularly arranged at a U-shaped lateral end of the filter medium exposed to the main body, the air inlet and the air outlet are separated from each other. The space combined by the filter medium and filter base is divided into an outer air chamber and an inner cleaning cavity. The filter method is more efficient. In addition, the filter medium can contact and react with the dispersed raw gas more evenly, and the raw gas entering the filter medium can be filtered and processed into clean gas, and the effect is particularly remarkable.

Description

TECHNICAL AREA

The present invention relates to the technical field of filter devices, in particular to a filter element and a filter device.

STATE OF THE ART

At present, the filter device used for the filtration treatment of a gas medium is widely used in the air purification system of the internal combustion engine.

In the Chinese patent application with the publication number CN101678264B describes an air cleaner core applied to a fresh air system of an internal combustion engine. The filter core features a “U” shaped filter body housed in a two-piece plastic filter base through which ambient air flows radially from the outside in, with the cleaned air exiting the cleaning cavity between the side legs of the filter body. And the pleated filter is held on the filter base, the filter base consists of upper and lower case end plates, and the “U” shaped pleated filter is sandwiched between the end plates. During production, the pleated filter is clamped between the two end plates and then a gluing or welding process is carried out so that the pleated filter is pressed against the end edge of the end plate and is firmly connected to it.

Applicant has found that the filter in the above mentioned patent has an inlet on the raw gas inlet side and an outlet on the clean gas outlet side. For the inlet located next to the outlet side, on the one hand, it is extremely easy to cause doping between the raw gas to be filtered and the filtered clean gas, and it is difficult to effectively partition different air chambers. On the other hand, such a gas supply method obviously greatly reduces the working efficiency of the whole filter, and it is easy for the medium such as filter paper near the inlet side to fail because of long time local filtration (because the raw gas tends to remain in the filter), and it is more difficult To put the remaining filter paper in contact with the raw gas and still keep the original filter effect, resulting in wastage when the filter paper is replaced directly. And it is difficult to achieve the purpose of filtration unless replacing is done. This greatly affects the air purification work.

It should be noted that the information disclosed in this prior art is only for enhancement of understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that this information is available to a person skilled in the relevant technical field already known state of the art.

CONTENT OF THE PRESENT INVENTION

In view of this, the purpose of the present invention is to provide a filter element and a filter device to solve the above problems.

• Die vorliegende Anmeldung stellt ein Filterelement bereit, das für eine Filtervorrichtung eines Luftreinigungssystems eines Verbrennungsmotors geeignet ist, umfassend: ein U-förmig ausgebildetes gefaltetes Filtermedium und eine an das Filtermedium angepasste Filterbasis; wobei die Filterbasis als integrale Komponente mit einem Montageabschnitt konfiguriert ist, das Filtermedium in einer U-Form um den Montageabschnitt herum entlang der Längsrichtung der Filterbasis zusammengebaut ist, und nach der Montage die Innenseite der Filterbasis einen Reinigungshohlraum bildet; wobei die Filterbasis an beiden Stirnflächenseiten mit abdichtenden Endkappen versehen ist, wobei die jeweiligen Endkappen in einer geschlossenen Anordnung konfiguriert sind, um zumindest nach dem Zusammenbau an den jeweiligen Stirnseiten der Filterbasis den Reinigungshohlraum zu verschließen; wobei die Filterbasis mit einem Luftauslass versehen ist, der mit dem Reinigungshohlraum in Verbindung steht, und der Luftauslass einem U-förmigen offenen Ende des Filtermediums gegenüberliegt; und mindestens ein Lufteinlass zwischen den Seitenwänden der beiden Endkappen gebildet ist, die auf einer Seite des Luftauslasses vermieden sind, und der Lufteinlass ringförmig an einem U-förmigen seitlichen Ende des Filtermediums angeordnet ist, das dem Hauptkörper ausgesetzt ist, und der Lufteinlass und der Luftauslass voneinander getrennt angeordnet sind; wobei das Filtermedium und die Filterbasis von dem durch die Endkappen kombinierten Raum in eine äußere Luftkammer und einen inneren Reinigungshohlraum unterteilt sind, und die jeweiligen Endkappen zum Verbinden mit der Filtervorrichtung verwendet werden, um dazu zu eignen, das Filterelement in das Luftreinigungssystem des Verbrennungsmotors zu definieren.

The present invention adopts the following technical solutions:

• The present application provides a filter element suitable for a filter device of an air cleaning system of an internal combustion engine, comprising: a pleated filter medium formed in a U-shape and a filter base fitted to the filter medium; wherein the filter base is configured as an integral component with a mounting portion, the filter media is assembled in a U-shape around the mounting portion along the longitudinal direction of the filter base, and after assembly, the inside of the filter base forms a cleaning cavity; the filter base being provided with sealing end caps on both face sides, the respective end caps being configured in a closed arrangement to enclose the cleaning cavity at least after assembly at the respective face sides of the filter base; wherein the filter base is provided with an air outlet communicating with the cleaning cavity, and the air outlet faces a U-shaped open end of the filter medium; and at least one air inlet is formed between the side walls of the two end caps avoided on one side of the air outlet, and the air inlet is annularly arranged at a U-shaped lateral end of the filter medium exposed to the main body, and the air inlet and the air outlet are arranged separately from each other; wherein the filter medium and the filter base are divided into an outer air chamber and an inner cleaning cavity by the space combined by the end caps, and the respective end caps are used for connection to the filter device to be suitable for defining the filter element in the air cleaning system of the internal combustion engine .

As a further improvement, the filter base includes a sealing plate and a U-shaped skeleton abutting the sealing plate, with the mounting portion being formed on the outer face of the skeleton to releasably conform to the U-pleated filter media.

As a further improvement, the sealing plate is arranged across a U-shaped opening of the skeleton, and the air outlet penetrates through the sealing plate to connect the cleaning cavity enclosed by the inner face of the skeleton, and the air outlet is arranged to extend outward laterally at the base.

As a further improvement, the sealing plate abuts the respective end caps along at least the upper and lower end sides, the sealing plate separates the air outlet and the air inlet along the left and right end sides.

As a further improvement, the skeleton is configured as a hollow frame body, the frame body is provided with multiple window units from the outside to the inside, so that the gas flows from the filter medium to the inner cleaning cavity along a raw dirt side where the external air chamber is located, and evenly concentrated along flows together axially with the air outlet on the cleaning side.

As a further improvement, the window units are arranged side by side horizontally and vertically on the skeleton, and the density of each window unit located on the U-shaped leg body is greater than the density of each window unit located on the U-shaped arch connecting bend.

As a further improvement, the skeleton is outwardly bent near its U-shaped open end to form a protrusion and the protrusion is arranged in an arcuate bend to stably define the composite filter media, with the filter media having a high and low folded filter paper of different thicknesses, and the thickness of the folded filter paper fitted to the projection is smaller than the thickness of the folded filter paper fitted to other skeleton parts; and wherein the filter paper has a fold density gradually decreasing along the direction of its U-shaped open end from the U-shaped lateral end to the curved lower end; and the both ends of the folded filter paper are covered in the sealing plate.

As a further improvement, it also includes a hollow pillar base configured at the filter base; the hollow pillar vertically penetrating the two end caps and being located centrally between the two legs of the skeleton, the hollow pillar being engaged by a connecting bridge with the skeleton for receiving and fixing the filter element in the filter device; and the inner cavity of the pillar base is tightly separated from the purification cavity, and the pillar base configured centrally on the purification cavity can perform flow division guidance of the gas in the purification cavity.

As a further improvement, the connection between the end caps and the hollow column base, filter media and filter base is an encapsulating close fit; and with a flange of the end caps extending outward along the transverse direction of the end caps, suitable for external connection, viewed from vertically from top to bottom, the flange can shield at least the filter medium into the end caps, so that the filter element optically a box shape.

The present application further provides a filter device used for air filtration treatment of an air purification system of an internal combustion engine, and the filter device includes the filter element mentioned above.

1. 1. Das Filterelement der vorliegenden Anmeldung ist zwischen dem Luftauslass, der dem U-förmigen offenen Ende des Filtermediums gegenüberliegt, und dem Lufteinlass, der ringförmig zwischen den Seitenwänden der beiden Endkappen angeordnet ist, vermieden angeordnet und unabhängig voneinander getrennt, um die Dotierung des Rohgases am Lufteinlass und des Reingases am Luftauslass zu reduzieren, und um damit die Reinheit des Gases für die Verbrennung des Verbrennungsmotors deutlich zu verbessern. Außerdem ist der Lufteinlass ringförmig an einem U-förmigen seitlichen Ende des Filtermediums angeordnet, das dem Hauptkörper ausgesetzt ist, und der Lufteinlass befindet deutlich auf einer anderen Seite als der Luftauslass. Und der ringförmig angeordnete Lufteinlass fördert den gleichmäßigen Eintritt des Rohgases aus der externen Luftkammer in den Reinigungshohlraum entlang der Umfangsrichtung. Die Filtermethode ist effizienter. Außerdem kann das Filtermedium das dispergierte Rohgas gleichmäßiger kontaktieren und damit reagieren, und das in das Filtermedium eintretende Rohgas kann gefiltert und zu Reingas verarbeitet werden, und die Wirkung ist besonders bemerkenswert.
2. 2. Bei der vorliegenden Erfindung wird der Reinigungshohlraum durch die beiden Endkappen verschlossen, so dass der Reinigungshohlraum nur durch den damit verbundenen Luftauslass das Reingas leitend abgeben kann. Verbinden Sie die jeweiligen Endkappen in die Filtervorrichtung, sodass das im Filterelement freigelegte Filtermedium direkt mit dem Rohgas in der Luftkammer in Kontakt kommt, und eine umfassendere und effizientere Filterverarbeitung im Medium ausgeführt wird, um das Versagen, das durch lokalen Filterbetrieb für eine lange Zeit verursacht wird, zu vermeiden, die Lebensdauer erheblich zu verbessern und damit die Verwendung des Reingases durch den Benutzer zu fördern.

By applying the technical solutions mentioned above, the present invention can achieve the following technical effects:

1. 1. The filter element of the present application is arranged between the air outlet, which faces the U-shaped open end of the filter medium, and the air inlet, which is annularly arranged between the side walls of the two end caps, avoided and separated independently to avoid the doping of the raw gas at the air inlet and the clean gas at the air outlet, and thus to significantly improve the purity of the gas for combustion of the internal combustion engine. In addition, the air inlet is annularly arranged at a U-shaped lateral end of the filter medium exposed to the main body, and the air inlet is located on a significantly different side from the air outlet. And the annularly arranged air inlet promotes the smooth entry of the raw gas from the external air chamber into the cleaning cavity along the circumferential direction. The filter method is more efficient. In addition, the filter medium can contact and react with the dispersed raw gas more evenly, and the raw gas entering the filter medium can be filtered and processed into clean gas, and the effect is particularly remarkable.
2. 2. In the present invention, the cleaning cavity is closed by the two end caps, so that the cleaning cavity can discharge the clean gas conductively only through the air outlet connected thereto. Connect the respective end caps into the filter device, so that the filter media exposed in the filter element comes into direct contact with the raw gas in the air chamber, and more comprehensive and efficient filter processing is carried out in the media, avoiding the failure caused by local filter operation for a long time is to be avoided, greatly improving the service life and thereby promoting the use of the clean gas by the user.

character list

• 1 ist ein schematisches Strukturdiagramm eines Filterelements gemäß dem Ausführungsbeispiel der vorliegenden Erfindung;
• 2 ist ein schematisches Strukturdiagramm einer in 1 oben angeordneten Endkappe nach Demontage;
• 3 ist ein schematisches Explosionsdiagramm in 1;
• 4 ist ein schematisches Querschnittsdiagramm eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 5 ist ein schematisches Strukturdiagramm eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung aus einer anderen Perspektive;
• 6 ist ein schematisches Strukturdiagramm eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung aus anderen Perspektiven;
• 7 ist ein schematisches Strukturdiagramm zwischen einem Filtermedium und einer Filterbasis eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 8 ist ein schematisches Strukturdiagramm einer Filterbasis eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 9 ist ein schematisches Strukturdiagramm eines Filtermediums eines Filterelements gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly presents the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and therefore are not considered to limit the scope should. And for those skilled in the relevant technical field, other related drawings can also be obtained according to these drawings without any creative effort.

• 1 Fig. 12 is a schematic structural diagram of a filter element according to the embodiment of the present invention;
• 2 is a schematic structural diagram of an in 1 top mounted end cap after disassembly;
• 3 is a schematic exploded diagram in 1 ;
• 4 12 is a schematic cross-sectional diagram of a filter element according to an embodiment of the present invention;
• 5 12 is a schematic structural diagram of a filter element according to an embodiment of the present invention from a different perspective;
• 6 12 is a schematic structure diagram of a filter element according to an embodiment of the present invention from different perspectives;
• 7 12 is a schematic structure diagram between a filter medium and a filter base of a filter element according to an embodiment of the present invention;
• 8th 12 is a schematic structure diagram of a filter base of a filter element according to an embodiment of the present invention;
• 9 12 is a schematic structure diagram of a filter medium of a filter element according to an embodiment of the present invention.

Reference List

1

filter medium;

2

filter base;

21

sealing plate;

22

Skeleton;

221

window unit;

222

Head Start;

3

end cap;

3 1

Flange;

4

air outlet;

5

air intake;

6

hollow column base;

7

connecting bridge;

A

cleaning cavity;

B

air chamber.

DETAILED DESCRIPTION

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described below clearly and fully with reference to the accompanying drawings in the embodiments of the present invention.

example

In reference to the 1 until 9 the present embodiment provides a filter element suitable for a filter device of an air cleaning system of an internal combustion engine, comprising: a U-shaped pleated filter medium 1 and a filter base 2 fitted to the filter medium 1. The filter base 2 is configured as an integral component having a mounting portion . The filter medium 1 is assembled in a U-shape around the mounting portion along the longitudinal direction of the filter base 2, and after the assembly, the inside of the filter base 2 forms a cleaning cavity A. The filter base 2 is provided on both end face sides with sealing end caps 3, the respective End caps 3 are in a closed arrangement tion configured to close the cleaning cavity A at least after assembly at the respective end faces of the filter base 2 . The filter base 2 is provided with an air outlet 4 communicating with the cleaning cavity A, and the air outlet 4 faces a U-shaped open end of the filter medium 1 . And at least one air inlet 5 is formed between the side walls of the two end caps 3 avoided on one side of the air outlet 4 (cf. 1 and 4 ), and the air inlet 5 is arranged annularly at a U-shaped lateral end of the filter medium 1 exposed to the main body, and the air inlet 5 and the air outlet 4 are arranged separately from each other. The filter medium 1 and the filter base 2 are divided from the space combined by the end caps 3 into an outer air chamber B and an inner cleaning cavity A (cf. 2 and 5 ), and the respective end caps 3 are used for connection to the filter device in order to be suitable to define the filter element in the air cleaning system of the internal combustion engine.

In the above, the filter element is arranged between the air outlet 4, which is opposite to the U-shaped open end of the filter medium 1, and the air inlet 5, which is arranged annularly between the side walls of the two end caps 3, avoided and separated independently from each other to avoid the doping of the To reduce raw gas at the air inlet 5 and the clean gas at the air outlet 4, and thus significantly improve the purity of the gas for combustion of the internal combustion engine. In addition, the air inlet 5 is arranged annularly at a U-shaped lateral end of the filter medium 1 exposed to the main body, and the air inlet is located on a significantly different side from the air outlet 4. And the air inlet 5 arranged annularly promotes the smooth entry of the raw gas from the external air chamber B into the cleaning cavity A along the circumferential direction. The filter method is more efficient. And the filter medium 1 can contact and react with the dispersed raw gas more evenly, and the raw gas entering the filter medium 1 can be filtered and processed into clean gas, and the effect is particularly remarkable.

In this exemplary embodiment, the cleaning cavity A is closed by the two end caps 3, so that the cleaning cavity A can only discharge the clean gas conductively through the air outlet 4 connected thereto. Connect the respective end caps 3 into the filter device, so that the filter medium 1 exposed in the filter element comes into direct contact with the raw gas in the air chamber B, and more comprehensive and efficient filter processing is carried out in the medium to avoid the failure caused by local filter operation for a caused for a long time, greatly improve the service life, and thereby promote the user's use of the clean gas.

Obviously, in the above embodiment, the air inlet 5 is open, which is arranged annularly between the side walls of the two end caps 3 in order to transfer the raw gas into the filter element. The conventional one-way insertion into the air chamber B only along one end of the existing inlet is eliminated. Therefore, each air chamber B facing the air inlet 5 can introduce the raw gas into the internal cleaning cavity A independently, and the filtering process is more efficient and uniform. Here, the air chamber B is an external cavity in the structure to which the filter element belongs, which is used to connect directly to the raw dirt side described below.

At this time, the filter medium 1 assembled in the longitudinal direction of the filter base 2 abuts the mounting portion in a U-shape to cover a part of the filter base 2 in the circumferential direction, thereby ensuring that the raw gas entering the inner cleaning cavity A along the air inlet 5 can penetrate the pleated filter medium 1 must penetrate in order to carry out the filtration process and thus obtain the final clean gas.

As in 2 and 7 1, in one embodiment, the filter base 2 includes a sealing plate 21 and a U-shaped skeleton 22 abutting the sealing plate 21. As shown in FIG. The mounting portion is formed on the outer face of the skeleton 22 so as to detachably abut the filter medium 1 folded in a U-shape. Thereby, the U-folded filter medium 1 abuts against the outer face of the skeleton 22 to laterally intercept between the inner cleaning cavity A and the external air chamber B, and to perform quick disassembly, assembly and replacement of the filter medium 1 on the skeleton 22 .

In one embodiment, the sealing plate 21 is arranged across a U-shaped opening of the skeleton 22, and the air outlet 4 penetrates through the sealing plate 21 to connect the cleaning cavity A enclosed by the inner face of the skeleton 22, and the air outlet is outward sideways extends arranged at the base. At this time, the outwardly extending air outlet 4 is integrally formed on the sealing plate 21 so as to abut on the outer clean side to rapidly supply clean gas to the engine. In addition, the sealing plate 21 extends laterally to the outside of the skeleton 22 to form a fixed structure suitable for assembling the skeleton 22, and the integral component formed by injection molding of the sealing plate 21 and the skeleton 22 is a single plastic part.

In one embodiment, the sealing plate 21 abuts the respective end caps 3 along at least the upper and lower end sides, the sealing plate partitions the air outlet 4 and the air inlet 5 along the left and right end sides. On the one hand, the frontal stretching of the sealing plate 21 facilitates the alignment and sealing of the sealing plate 21 and the skeleton 22 on the end caps 3 in order to form a closed inner space (cleaning cavity A). Second, the air outlet 4 and the side air inlet 5 can be effectively separated at the U-shaped open end to achieve clearer air inlet and air outlet operation.

As in 3 and 8th As shown, in one embodiment, the skeleton 22 is configured as a hollow frame body. The frame body is provided with a plurality of window units 221 from outside to inside, so that the gas flows from the filter medium to the inner cleaning cavity A along the raw dirt side where the external air chamber B is located, and uniformly concentrated along the air outlet 4 to the cleaning side flows together axially. Thereby, the frame body forms the hollow skeleton 22 by means of the provided window units 221, which can reduce the mass of the skeleton 22 without reducing the installation strength of the skeleton 22. In addition, the multiple hollow window units 221 greatly facilitate the direct entry of gas along the filter medium 1 through respective window units 221 into the inner cleaning cavity A, which increases the velocity and volume of the input gas to supply the filtered clean gas to the air outlet 4 continuously.

At this time, the window units 221 are arranged side by side horizontally and vertically on the skeleton 22, and the density of each window unit 221 located on the U-shaped leg body is greater than the density of each window unit 221 located on the U-shaped arc connecting bend . Such arrangement of the window units 221 facilitates the skeleton 22 located on both legs to perform more effective and complete gas filtering and transmission efficiency in a large-scale gas transmission area. And in a small gas transmission area at the bottom of the connected and bent skeleton 22, a little lower efficiency is carried out. The filter variety of the entire filter medium 1 is improved and it is adapted to the gas delivery volume of the air chamber B surrounding the raw dirt side, and the filter medium 1 below has a smaller volume for taking up the raw gas.

As in 7 and 8th As shown, in one embodiment, the skeleton 22 is bent outwardly near its U-shaped open end to form a protrusion 222, and the protrusion 222 is arranged in an arcuate bend to stably define the composite filter media 1, wherein , as in 7 and 9 1, the filter medium 1 is a high and low pleated filter paper with different thicknesses, and the thickness of the pleated filter paper fitted to the projection 222 is smaller than the thickness of the pleated filter paper fitted to other skeleton 22 parts ; and wherein the filter paper has a fold density gradually decreasing along the direction of its U-shaped open end from the U-shaped lateral end to the curved lower end; and the both ends of the folded filter paper are covered in the sealing plate 21.

In the above, the thickness of the filter paper is adjusted so that it is folded up and down to fit the skeleton 22 with the projection 222. As a result, the filter paper is not affected by the protrusion 222 when the filter paper is received outside of the skeleton 22, resulting in greater expansion of the filter paper to ensure that the assembled filter paper maintains a specific pleated filter thickness.

In addition, the arcuate bending design of the projection 222 can ensure further protection of the filter paper in a folded state and avoid phenomena such as sharp tearing. In addition, the protrusion 222 can serve to limit the clamping of the folded filter paper, which is conducive to mounting and positioning the filter paper on the skeleton 22 and prevents the filter paper from being easily separated from the skeleton 22 along the longitudinal direction.

It should be noted that the fold density is the degree of aggregation of the filter paper after folding, it is positively correlated. The higher the folding density, the better the filter effect. As a result, the density of the filter paper located on both legs is greater to improve the filtering efficiency of the large-area gas transmission area.

As in 6 and 8th shown, it also includes, in one embodiment, a hollow column base 6 configured on the filter base 2 . Here is the hollow column base 6 is engaged by a connecting bridge 7 to the skeleton 22 for receiving and fixing the filter element in the filter device. And the inner cavity of the pillar base 6 is tightly separated from the purification cavity A, and the pillar base 6 configured centrally on the purification cavity A can perform flow division guidance of the gas in the purification cavity A.

Specifically, a plurality of connecting bridges 7 are overlapped between the pillar base 6 and the skeleton 22 , and the respective connecting bridges 7 are arranged horizontally on the upper and lower faces of the pillar base 6 and the skeleton 22 . Preferably, the hollow column base 6 can be an integral component together with the skeleton 22 . Thereby, the hollow pillar base 6 is firmly provided between the skeletons 22 and sealingly separates two flow guide directions of the cleaning cavity A to the air outlet 4 to increase the arrangement of flow distribution inside the cavity. After the filter element is assembled to the filter device, the hollow pillar base 6 can serve the purpose of quick positioning and assembly.

The connection between the end caps 3 and the hollow pillar base 6, the filter medium 1 and the filter base 2 is an encapsulating close fit. As in 5 and 6 shown, with a flange 31 of the end caps 3 extending outwards along the transverse direction of the end caps and suitable for an external connection, viewed from vertically from top to bottom, the flange 31 can shield at least the filter medium 1 into the end caps 3, so that the filter element optically has a box shape. Obviously the flange 31 is partly the side wall of the end caps 3 forming the air inlet 5. The outwardly extending flange 31 increases the transverse path of the corresponding air inlet 5, which facilitates guiding and introducing the raw gas and facilitating the collection of the gas on the raw dirt side toward the air chamber B to improve the working efficiency of the filter element. In addition, the box shape facilitates quick disassembly and assembly of the filter element in the filter device.

In other embodiments, the end caps 3 may be injection molded on the upper and lower faces, providing more efficient sealing and tight connection, as well as better reliability.

The present embodiment further provides a filter device used for air filtration treatment of an air purification system of an internal combustion engine, and the filter device includes the filter element mentioned above. The housing (not shown) of the filter device abuts the two end caps 3 of the filter element, the raw gas received in the housing is directed to and enters the air inlet 5 of the filter element to achieve smoother and more effective gas filtration operation.

The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the gist of the present invention belong to the scope of the present invention.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited 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

• CN 101678264B [0003]

Claims (10)

A filter element suitable for a filter device of an air cleaning system of an internal combustion engine, comprising: a pleated filter medium (1) formed in a U-shape; a filter base (2) fitted to the filter medium (1); wherein the filter base is configured as an integral component with a mounting portion; the filter medium (1) is assembled in a U-shape around the mounting portion along the longitudinal direction of the filter base (2), and after the assembly, the inside of the filter base (2) forms a cleaning cavity (A); the filter base (2) being provided with sealing end caps (3) on both face sides, the respective end caps (3) being configured in a closed arrangement to at least after assembly at the respective face sides of the filter base (2) seal the cleaning cavity (A ) to close; characterized in that the filter base (2) is provided with an air outlet (4) communicating with the cleaning cavity (A), and the air outlet faces a U-shaped open end of the filter medium (1); and at least one air inlet (4) is formed between the side walls of the two end caps (3) avoided on one side of the air outlet (5), and the air inlet (5) is annular at a U-shaped lateral end of the filter medium (1) is arranged exposed to the main body, the air inlet and the air outlet (4) are arranged separately from each other; wherein the filter medium (1) and the filter base (2) are divided into an outer air chamber (B) and an inner cleaning cavity (A) by the space combined by the end caps (3), and the respective end caps (3) for connection to the Filter device used to be suitable to define the filter element in the air cleaning system of the internal combustion engine. filter element after claim 1 , characterized in that the filter base (2) comprises a sealing plate (21) and a U-shaped skeleton (22) abutting against the sealing plate, wherein the mounting portion is formed on the outer end face of the skeleton (22) to be detachably attached the U-shaped folded filter medium (1) is adapted to fit. filter element after claim 2 , characterized in that the sealing plate (21) is arranged across a U-shaped opening of the skeleton (22), and the air outlet (4) penetrates the sealing plate (21) around the inner face of the skeleton (22) enclosed To connect cleaning cavity (A), and the air outlet extending outwards laterally is located on the base. filter element after claim 3 , characterized in that the sealing plate (21) abuts the respective end caps (3) along at least the upper and lower end sides, the sealing plate partitions the air outlet (4) and the air inlet (5) along the left and right end sides. filter element after claim 2 , characterized in that the skeleton (22) is configured as a hollow frame body, the frame body is provided with a plurality of window units (221) from outside to inside, so that the gas along a raw dirt side where the external air chamber (B) is located, flows through from the filter medium (1) to the inner cleaning cavity (A), and flows together axially in an evenly concentrated manner along the air outlet (4) to the cleaning side. filter element after claim 5 , characterized in that the window units (221) are arranged side by side horizontally and vertically on the skeleton (22), and the density of respective window units (221) located on the U-shaped leg body is larger than the density of respective window units (221 ) that are located on the U-shaped arch connecting bend. filter element after claim 5 characterized in that the skeleton (22) is outwardly bent near its U-shaped open end to form a boss (222), and the boss (222) is disposed in an arcuate bend around the composite filter media (1) to define stably, wherein the filter medium (1) is a high and low pleated filter paper with different thicknesses, and the thickness of the pleated filter paper fitted to the projection (222) is smaller than the thickness of the pleated filter paper which adapted to other skeletal parts is; and wherein the filter paper has a fold density gradually decreasing along the direction of its U-shaped open end from the U-shaped lateral end to the curved lower end; and both ends of the folded filter paper are covered in the sealing plate (21). filter element after claim 2 characterized in that it also comprises a hollow pillar (6) configured on the filter base (2); wherein the hollow column base (6) penetrates the two end caps (3) vertically and is arranged centrally between the two legs of the skeleton (22), the hollow column base (6) being connected by a connection manure bridge (7) is engaged with the skeleton (22) for receiving and fixing the filter element in the filter device; and the inner cavity of the pillar base (6) is tightly separated from the purification cavity (A), and the pillar base (6) configured centrally on the purification cavity (A) can perform flow division guidance of the gas in the purification cavity (A). filter element after claim 8 characterized in that the connection between the end caps (3) and the hollow column base (6), the filter media (1) and the filter base (2) is an encapsulating close fit; and with a flange (31) of the end caps (3) extending outwardly along the transverse direction of the end caps (3) and suitable for external connection, as viewed vertically from top to bottom, the flange (31) contains at least the filter medium ( 1) into the end caps (3) so that the filter element has a box shape optically. Filter device used for air filtration treatment of an air cleaning system of an internal combustion engine, characterized in that the filter device comprises the filter element according to any one of Claims 1 - 9 includes.

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