DE202013011869U1 - Filter system with sensor nozzle - Google Patents

Abstract

Filter system (100) comprising - a housing (108) with a housing wall (112) and at least one cover (110), - an inlet connection (102) arranged on the housing (108) for supplying a fluid to be filtered, in particular air, - one on the housing (108) arranged outlet connection (104) for draining the filtered fluid, - a sensor connection (120) arranged on the housing (108), the sensor connection (120) obliquely to a longitudinal axis (L) of the housing (108) in an end region (116 ) of the housing (108) is arranged.

Description

Technical area

The invention relates to a filter system with a sensor nozzle, in particular for use as an air filter of an internal combustion engine.

State of the art

From the DE 10 2009 033 261 A and from the EP1835166A Air filter systems are known in which service inspection nozzles, such as a maintenance interval display, are attached to a clean air outlet from which they exit at right angles. In the DE 10 2009 033 261 A the outlet is firmly attached to a filter housing while in the EP1835166A the outlet is rotatably mounted in the filter housing. As a result, the connecting piece for maintenance indicators can be turned into a suitable position in order to attach a hose or a sensor to be connected there in a position which is favorable for the installation situation, for example on an internal combustion engine. In both cases, a sensor or hose attached to the connecting piece protrudes far beyond the contour of the housing of the air filter system due to the right-angled arrangement of the connecting piece at the outlet. This requires on the one hand additional space and on the other hand brings with it the risk of damaging the sensor.

An object of the invention is therefore to provide a compact filter system with a sensor nozzle, in which the sensor nozzle is housed largely damage.

The above objects are achieved according to one aspect of the invention with a filter system which provides a housing arranged on the sensor nozzle, wherein the sensor nozzle is arranged obliquely to a longitudinal axis of the housing in an end region of the housing.

Favorable embodiments and advantages of the invention will become apparent from the other claims, the description and the drawings.

Disclosure of the invention

A filter system is proposed, wherein the filter system comprises a housing with a housing wall and at least one cover, an inlet connection arranged on the housing for supplying a fluid to be filtered, in particular air, an outlet connection arranged on the housing for discharging the filtered fluid, and a sensor connection piece arranged on the housing includes. In this case, the sensor nozzle is arranged obliquely to a longitudinal axis of the housing in an end region of the housing.

The inventive arrangement of a sensor nozzle for connection of, for example, maintenance indicators represents a particularly space-saving solution and is therefore particularly important in the installation of filter systems to internal combustion engines in the automotive sector, where the space is typically very limited. Especially with small circular air filter housings, the connection thread of a sensor nozzle can not be lowered into a kind of groove in a purely radial arrangement of the connection piece on the housing. As a result, a screwed-on service indicator would protrude completely outside of the housing diameter. On the one hand, the claimed installation space would have a very large diameter. On the other hand, there is also the risk that the sensor nozzle with the maintenance indicator could easily be damaged by its projecting position during installation. In the oblique arrangement according to the invention, a maintenance indicator can be largely accommodated within the contour of the filter system, so that the space is well utilized and the sensor nozzle does not protrude excessively. Nevertheless, the sensor or connection elements can be easily attached, in particular screwed.

An oblique arrangement also makes it possible better to protect a already screwed on the sensor nozzle maintenance indicator during handling and / or transport of the filter system in terms of logistics and / or installation at the customer against possible damage. Also, the necessary space requirement in the radial direction is lower. Compared to a solution in which a sensor nozzle would sit radially on the outlet, the oblique arrangement has a space advantage in the axial direction, because the length of the outlet can be kept until the beginning of a mounting surface, for example on an internal combustion engine, lower.

Compared to an axial connection solution on an end face of the housing, the oblique arrangement has the advantage that more space is available between a mounted on the sensor nozzle maintenance indicator and the outlet, which is needed for example for mounting a rubber hose with clamp for air flow.

Advantageously, the sensor stub can be arranged adjacent to the outlet stub, which is typically part of the housing wall. In this way it is possible to accurately measure, for example, a pressure drop due to the loading of the filter system by dirt particles, since the pressure can be determined directly in the outlet channel.

Most advantageously, the sensor nozzle can be arranged at the base of the outlet. The attachment of a service indicator can determine the relevant pressure for maintenance interval display directly here and on the other hand, can be used to advantage in mounting the sensor nozzle at this location, the space of the housing of the filter system.

In an expedient embodiment, the sensor neck can be arranged on a housing end face. When attaching the sensor nozzle in this area, the pressure to be determined in the immediate vicinity of the outlet can be measured. In addition, it is possible that a mounted sensor or a maintenance indicator does not protrude radially beyond the circumference of the housing.

Advantageously, the sensor nozzle can be arranged at an angle between 10 ° and 80 °, preferably between 20 ° and 70 °, particularly preferably between 30 ° and 60 °, to the housing end face. Such an angle allows a convenient mounting position for the screwing or plugging a sensor, a sensor plug or a maintenance indicator. For typical service interval display components, a distance of at least 10 millimeters between the mounted sensor and the outlet port can be maintained, which is usually considered sufficient on automotive-loaded systems.

In an alternative embodiment, the sensor nozzle can also be arranged directly on the outlet nozzle. The outlet port as part of the housing wall is a convenient mounting location for the sensor nozzle, as it can be measured directly in the outlet channel determining the pressure for a maintenance indicator.

Advantageously, the outlet nozzle can be arranged concentrically with respect to the longitudinal axis and the sensor nozzle can be arranged laterally offset relative to the longitudinal axis. In round filter housings, it is common practice to mount the outlet nozzle in a symmetrical arrangement concentric with the longitudinal axis. The sensor nozzle can thus be aligned in an oblique arrangement radially in the direction of the longitudinal axis, but it can also be laterally offset thereto, if the space can be exploited so cheaper.

Such an arrangement may also mean that the sensor stub is arranged laterally offset from an axis of the outlet stub in a wall of the outlet stub. Such attachment allows the sensor nozzle to be located directly in the wall of the outlet nozzle, but not symmetrically with respect to an axis of the outlet nozzle, but laterally offset therefrom. Also, such an arrangement may be favorable for space reasons and still allows to determine the determining pressure for a maintenance indicator directly in the exhaust duct.

Advantageously, a connection channel of the sensor nozzle can open into a clean side of the filter system. If the sensor nozzle is arranged closely adjacent to the outlet nozzle, ie, for example, directly at the outlet nozzle or at the base of the outlet nozzle, then the connecting channel of the sensor nozzle can open directly into the outlet channel and thus into the clean side, ie the region where the filtered fluid flows thus provide favorable measured values for a maintenance indicator.

Conveniently, the sensor nozzle can be made in one piece with the housing. In this way, the sensor nozzle can be provided and manufactured in a manufacturing process, so that no additional assembly or sealing of the sensor nozzle to the housing of the filter system is required.

Brief description of the drawings

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

They show by way of example:

1 a perspective view of a two-stage filter system with a cyclone separator according to an embodiment of the invention, shown from the side of the outlet nozzle;

2 a perspective view of the filter system of 1 represented by the lid side;

3 a detailed view of the filter system of 1 with view of the sensor nozzle;

4 a view of the front of the filter system of 1 ;

5 a side view of the filter system of 1 ;

6 a side view of the filter system of 1 with view of the sensor nozzle with mounted maintenance indicator; and

7 a longitudinal section through the filter system of 1 with cut through the sensor neck.

Embodiments of the invention

In the figures, the same or similar components are numbered with the same reference numerals. The figures are merely examples and are not intended to be limiting.

1 shows a perspective view of a two-stage filter system 100 with a cyclone separator 36 according to an embodiment of the invention, shown from the side of the outlet, with tangential inlet 102 , centric outlet 104 on a housing front side and bottom-side dirt outlet 106 , Shown is a round filter design, consisting of a housing 108 which is a housing wall 112 has and with a lid 110 , for example, with screw or bayonet lock, is closed. When used as an air filter system, dust-laden air flows into the inlet 102 , which is arranged tangentially to the internally mounted air filter element, so that the air inside the housing 108 is displaced by a flow protection on the filter element in a rotational movement. Filter element and Anströmschutz are not shown in the drawing. Due to the cyclone effect caused by the rotational movement of the air, centrifugal forces act on the dust particles of the flowing air, so that they partly deposit on the housing wall and via the dirt outlet 106 from the filter system 100 can flow out. As a result, the filter element is less loaded, the service life of the filter element is increased. The purified air can through the centric outlet 104 out of the case 108 be dissipated.

Such filter systems, as in 1 are usually used as air and / or particulate filter, in particular for internal combustion engines in construction machinery and agricultural machinery. They are characterized by great robustness and have short life due to the high filter load. A filter system 100 with loaded filter element must tolerate a weight gain of 10 kg or more.

Next shows 1 one on the housing 108 on a front side 124 arranged sensor nozzle 120 , wherein the sensor neck 120 obliquely to a longitudinal axis L of the housing 108 in one end area 116 of the housing 108 , In the illustrated embodiment, on an end face 124 , is arranged. Such a sensor nozzle 120 Can be used to connect a sensor as a maintenance indicator or maintenance interval display.

2 shows a perspective view of the filter system 100 from 1 , represented from the cover side. In the end area 116 of the filter system 100 is the outlet nozzle 104 to recognize, as well as the tangential inlet nozzle 102 , The housing 108 with its housing wall 112 will be at the other end of the filter system 100 through the openable lid 110 completed, the dirt outlet 106 for discharging the deposited over the cyclone effect larger dust particles.

In 3 is a detailed view of the filter system 100 from 1 with view of the sensor nozzle 120 shown. The outlet nozzle 104 is concentric with the longitudinal axis L of the housing 108 in the end area 116 of the housing 108 at the front 124 arranged. The sensor socket 120 , adjacent to the outlet 104 arranged, projects obliquely in the area between the front side 124 and the outlet nozzle 104 in the case 108 into it and opens into the wall 126 the outlet nozzle 104 at the foot of it 114 , At the end of the sensor nozzle 120 is a connecting thread 134 integrated to connect a sensor or maintenance indicator. Particularly favorable, the sensor nozzle 120 with the housing 108 be made in one piece, so that it with the housing 108 can be produced in one operation. For example, the sensor nozzle 120 to the housing 108 be sprayed.

4 provides a view of the front 124 of the filter system 100 from 1 In this illustration, the radial arrangement of the sensor nozzle 120 to recognize in the direction of the longitudinal axis L. The sensor socket 120 flows at the base 114 the outlet nozzle 104 into the wall of the outlet nozzle 104 and thus into the clean side 130 of the filter system 100 ,

5 shows a side view of the filter system 100 from 1 with view of the sensor nozzle 120 , The sensor socket 120 is diagonally at an angle 122 between 10 ° and 80 °, preferably between 20 ° and 70 °, particularly preferably between 30 ° and 60 °, to the housing end face 124 arranged, with the angle 122 between an axis L1 of the sensor nozzle 120 and the housing front 124 is defined. In this way, there is enough space for mounting a sensor, maintenance indicator, hose to a vacuum switch or a plug between the housing front 124 and the outlet nozzle 104 given.

6 shows a side view of the filter system 100 from 1 with view of the sensor nozzle 120 with mounted maintenance indicator 132 , The maintenance indicator 132 Although in the embodiment shown extends over the circumference of the housing 108 of the filter system 100 In addition, however, it closes with a plane passing through the top of the outlet nozzle 104 given is largely off. This means that the maintenance indicator the space of a mounting surface for the filter system 100 almost not affected and so space-saving on the filter system 100 can be arranged.

In 7 is a longitudinal section through the filter system 100 from 1 with cut through the sensor neck 120 shown. One recognizes in 7 that the connection channel 128 in this way in the foot 114 the outlet nozzle 104 so that the pressure for determining a maintenance interval time thereby directly on the clean side 130 of the filter system 100 can be measured.

In alternative embodiments (not shown), the sensor neck 120 directly on the outlet 104 be arranged. It is also conceivable that the outlet 104 is arranged concentrically to the longitudinal axis L and the sensor nozzle 120 is arranged laterally offset to the longitudinal axis L or that the sensor neck 120 laterally offset to an axis L1 of the outlet nozzle 104 in a wall 126 the outlet nozzle 104 is arranged. These embodiments may be advantageous under certain space constraints. Especially when installing such filter systems 100 On internal combustion engines in the narrow spaces of motor vehicles, it may be favorable, not symmetrical arrangement positions for the sensor nozzle 120 to choose.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 102009033261 A [0002, 0002]
• EP 1835166 A [0002, 0002]

Claims (10)

Filter system ( 100 ) - a housing ( 108 ) with housing wall ( 112 ) and at least one lid ( 110 ), - one on the housing ( 108 ) arranged inlet port ( 102 ) for supplying a fluid to be filtered, in particular air, - one at the housing ( 108 ) arranged outlet ( 104 ) for discharging the filtered fluid, - one at the housing ( 108 ) arranged sensor neck ( 120 ), wherein the sensor neck ( 120 ) obliquely to a longitudinal axis (L) of the housing ( 108 ) in an end region ( 116 ) of the housing ( 108 ) is arranged. Filter system according to claim 1, wherein the sensor neck ( 120 ) adjacent to the outlet ( 104 ) is arranged. Filter system according to claim 2, wherein the sensor neck ( 120 ) at the base ( 114 ) of the outlet ( 104 ) is arranged. Filter system according to one of the preceding claims, wherein the sensor neck ( 120 ) on a housing front side ( 124 ) is arranged. Filter system according to one of the preceding claims, wherein the sensor neck ( 120 ) at an angle ( 122 ) between 10 ° and 80 °, preferably between 20 ° and 70 °, particularly preferably between 30 ° and 60 °, to the housing end face ( 124 ) is arranged. Filter system according to one of the preceding claims 1 to 5, wherein the sensor neck ( 120 ) on the outlet ( 104 ) is arranged. Filter system according to one of the preceding claims, wherein the outlet nozzle ( 104 ) is arranged concentrically to the longitudinal axis (L) and the sensor neck ( 120 ) is arranged laterally offset to the longitudinal axis (L). Filter system according to one of the preceding claims, wherein the sensor neck ( 120 ) laterally displaced an axis (L1) of the outlet nozzle ( 104 ) in a wall ( 126 ) of the outlet ( 104 ) is arranged. Filter system according to one of the preceding claims, wherein a connecting channel ( 128 ) of the sensor nozzle ( 120 ) into a clean page ( 130 ) of the filter system opens. Filter system according to one of the preceding claims, wherein the sensor neck ( 120 ) with the housing ( 108 ) is made in one piece.

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