EP2705308A1

EP2705308A1 - Air-intake pipe for a ventilation system of a building

Info

Publication number: EP2705308A1
Application number: EP12718082.6A
Authority: EP
Inventors: Robert Kaspar; Mario Psyk
Original assignee: Rehau AG and Co
Current assignee: Rehau Automotive SE and Co KG
Priority date: 2011-05-03
Filing date: 2012-04-27
Publication date: 2014-03-12
Also published as: WO2012150021A1; DE202011100145U1

Abstract

The invention relates to an air-intake pipe (10) for a ventilation system of a building, wherein the air-intake pipe (10) has an elongate internal volume (12) through which drawn-in air can flow, wherein at least one air filter (16) for filtering the drawn-in air by way of a filter area (24) across which the drawn-in air can flow is provided in the internal volume (12), wherein the cross-sectional areas of the internal volume (12) have a maximum value, and wherein the filter area (24) is larger than the maximum value. The invention also relates to a ventilation system (44) for a building (42) having an air-intake pipe (10) of this kind.

Description

Air intake pipe for a ventilation system of a building

Background of the invention

The present invention relates to an air intake pipe for a ventilation system of a building, wherein the air intake pipe has an elongated internal volume through which air can flow, wherein at least one air filter is provided in the interior volume for filtering the sucked-in air with a filter surface which can be flowed in by the sucked-in air, the cross-sectional areas of the internal volume have a maximum value.

Due to increasingly better insulation properties of the outer shell of buildings heating and cooling loads are significantly reduced, but at the same time the natural air exchange with the environment is almost prevented. For this reason, ventilation systems are used especially in well-insulated buildings, these ventilation systems an air intake pipe - which is often referred to as Ansaugturm - may have the type mentioned. The air intake pipe is usually located outside or in the vicinity of the respective building. By means of a suction device of the ventilation system, air can be drawn in from outside or from the surroundings of the building via the air intake pipe and conveyed or sucked into the interior of the building via at least one further pipe. The air filter provided in the interior volume of the intake pipe generally serves at least for pre-cleaning the intake air. However, by providing the air filter used in known Luftansaugrohren the available from the ventilation system flow rate is significantly limited. Underlying task

The present invention has for its object to provide an air intake pipe with an air filter for filtering the intake air, with which the of a ventilation

l Anläge deployable volume flow sucked and filtered through the air filter air can be increased compared to known solutions.

Inventive solution

This object is achieved with an air intake pipe for a ventilation system of a building with the features of claim 1.

In contrast to known air intake pipes, in which filters are used whose filter area does not exceed the maximum value of the cross-sectional areas of the internal volume, the filter area of the air filter of the air intake pipe according to the invention, which may in particular consist of a polymer material, is greater than the maximum value of the cross-sectional areas of the internal volume with a reduction in the flow resistance of the air filter. By this reduction of the flow resistance of the air filter can be provided by the ventilation system volumetric flow sucked and filtered through the air filter air, without having to align the ventilation system consuming to a higher intake, which would also be associated with a higher energy consumption of the ventilation system , The latter would in turn adversely affect the overall energy balance of the building. That the cross-sectional areas of the inner volume have a maximum value, means that each cross-sectional area of the inner volume is less than or equal to the maximum value, or in other words, that the maximum value is not exceeded.

To achieve a substantially increased volume flow compared to known solutions and filtered through the air filter air, the filter area is preferably greater than or equal to 1, 2 times the maximum value, the maximum value preferably within a range of 0.35 to 7.00 m ² can.

In a preferred embodiment, the filter surface is rotationally symmetrical or substantially rotationally symmetric about a rotation axis, wherein the filter surface is particularly preferably in the form of a surface of a cone rotationally symmetrical about a rotation axis or essentially in the form of a lateral surface of a cone rotationally symmetrical about a rotation axis is trained. A filter surface formed in accordance with this preferred embodiment can be formed substantially larger even with a comparatively small overall length of the air filter than in known solutions in which the filter surface does not exceed the maximum value of the cross-sectional areas of the inner volume. Preferably, the lateral surface is directed in opposite directions with its tip of the flow direction of the sucked air. Furthermore, the axis of rotation is preferably arranged in the direction of the longitudinal extent of the inner volume or in the direction of the longitudinal axis of the inner volume or preferably substantially in the direction of the longitudinal extent of the inner volume or substantially in the direction of the longitudinal axis of the inner volume. By this orientation of the tip of the lateral surface and / or by the arrangement of the axis of rotation in the direction of the longitudinal extent or longitudinal axis of the inner volume of the air intake pipe, a very lossless or uniform flow of the filter surface is possible, along with a substantial improvement in the overall efficiency of the ventilation system.

In a practical embodiment, the air filter is formed from a flat filter material, wherein the filter material preferably rests on a support body, which is arranged in a predetermined position in the inner volume of the air intake pipe. According to this practical embodiment, a simple change of the filter material is possible, such that e.g. After a prolonged period of use, a filtering material which is severely restricted in its filtering action by adding dust or dirt particles can be removed in a simple and practical manner from the support body and replaced by a new, unused, flat filter material.

In a further practical embodiment, the filter material lies on at least one bearing surface of the support body at least partially flat, wherein the support surface is provided with a plurality of the support body passing through openings. The bearing surface on which the filter material at least partially or to

Completely or completely rests, advantageously the shape or the geometry of the filter surface in the inner volume of the air intake pipe, so that by simply placing the filter material on the contact surface a preferred shape or geometry of the filter surface can be provided. In particular, the preferred shape or geometry may be, for example, a shape or geometry optimized with regard to flow losses or filter performance, such as, in particular, the above lateral surface, so that the filter or the filter material can be pulled in a practical manner over the support body in the manner of a pocket filter , Over the majority of the support body passing through openings, which are facing the filter material or covered by the filter material, the sucked air after the flow and flow through the filter surface or the filter material can be discharged. Particularly preferably, the support body can be brought together with the applied filter material via a provided in a wall region of the air intake tube closable opening in the predetermined position. In this way, in particular, a simple change of the filter material is possible, such that, for example, after a long period of use in its filtering effect by adding dust or dirt particles severely limited filter material in a simple and practical way after removal from the inner volume of the air intake pipe from the support body , A new or unused flat filter material can be placed on the support body and brought together with the support body on the closable opening in the wall area in the predetermined position. Overall, therefore, on the closable opening in particular a filter change or filter replacement in a simple and practical way possible without this consuming z. B. must penetrate via an intake opening at one end of the air intake pipe into the inner volume of the air intake pipe. In particular, the filter change without a heavy equipment and without increased risk, such as the risk of injury to the task with the filter change technician, carried out.

In a preferred embodiment, the filter surface in a section parallel to the direction of flow of the sucked air at least partially a zigzag-shaped course or the filter surface may have in a section or longitudinal section parallel to the longitudinal extent of the air filter at least partially a zigzag course. By providing the zigzag course, the size of the inflatable filter surface can be significantly increased, accompanied by a significant reduction in the flow resistance of the air filter and a significant increase in the volume flow provided by the ventilation system and filtered air filtered through the air filter.

In a practical embodiment, a plurality of spaced-apart plate-shaped air filters is provided, wherein an inflatable filter surface of an air filter at least faces an inflowable filter surface of another air filter, and wherein the inflowable filter surfaces of the plate-shaped air filter arranged at an angle, preferably perpendicular to a transverse direction of the inner volume are. Also, by providing this practical embodiment, advantageously, a very large inflatable overall filter area can be provided by providing the plurality of spaced-apart plate-shaped air filters with their inflowable filter surfaces. Preferably, the plate-shaped air filters are releasably attached to a holding device, which is arranged in a predetermined position in the inner volume of the air intake pipe, wherein the holding device together with the plate-shaped air filters attached to the holding device via a provided in a wall region of the air intake tube closable opening in the predetermined Position can be brought.

In this way, in particular, a simple change of the plate-shaped air filter is possible, such that e.g. After prolonged use one or more in the filter effect by adding dust or dirt particles severely limited air filter solved in a simple and practical way after removal from the inner volume of the air intake pipe from the fixture, new or unused air filter attached to the fixture and together with the Holding device can be brought over the closable opening in the wall area in the predetermined position. Overall, therefore, a filter change or filter replacement is possible in a simple and practical manner via the closable opening in a manner that is not costly, for example. B. to have to penetrate via an intake opening at one end of the air intake into the inner volume of the air intake pipe. In particular, the filter change can be carried out without a heavy device and without increased risk, e.g. the risk of injury to the technician commissioned with the filter change.

The invention further relates to a ventilation system for a building with an air intake pipe according to the invention.

According to a practical embodiment, the ventilation system has at least one pipeline, which is provided for flowing in air drawn in via the air intake pipe from the environment of the building into an interior of the building, and wherein at least a portion of the pipeline for an arrangement in the ground in the vicinity of the building is provided. In this practical embodiment, the intended for an arrangement in the ground in the vicinity of the building section for the transmission of stored in the ground heat energy to the intake air or for the transmission of heat energy of the sucked air to the ground is provided. This section of the pipeline - which is intended to allow air sucked in via the air intake pipe from the environment of the building into an interior space of the building or via which the intake air can be transferred into the interior - is therefore used Partly as an air-geothermal heat exchanger, which in winter, for example, a preheating and summer, for example, a pre-cooling of the intake air.

Brief description of the drawings

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. It shows: a schematic representation of a first embodiment of an air intake pipe according to the invention, a schematic plan view of a support body of the first embodiment, a schematic representation of a longitudinal section through a portion of the support body of the first embodiment and by a resting on the portion of an air filter in

Form of a flat filter material, a schematic representation of a second embodiment of an air intake pipe according to the invention, a schematic plan view of a support body of the second

Embodiment, a schematic representation of a longitudinal section through a portion of the support body of the second embodiment and by resting on the portion of an air filter in the form of a flat filter material, a schematic representation of a third embodiment of a Luftansaugrohrs invention, a schematic plan view of a support body of the third embodiment , a schematic representation of a portion of an alternative Support body along with a longitudinal section of the part on the area

A schematic three-dimensional representation to illustrate the design of the support body of FIG. 3A and B, a schematic three-dimensional representation to illustrate the formation of the alternative support body of FIG. 3C, a schematic representation of a fourth embodiment of a Luftansaugrohr invention, a schematic representation of a section through the at

provided in the fourth embodiment, a plurality of spaced-apart plate-shaped air filters parallel to

Flow direction of the intake air, a schematic plan view of the plurality of air filters of Fig. 4B, and a schematic representation of a building, a Luftansaugrohrs invention in the vicinity of the building and a subsequent to the air intake pipe, which has a portion arranged in the ground.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The first exemplary embodiment of an air intake pipe 10 according to the invention for a ventilation system of a building, shown schematically in FIG. 1A, has an elongated interior volume 12 through which air can flow. The direction of flow is indicated schematically by the two parallel arrows. The upper end of the air intake pipe 10 in FIG. 1A is provided with a cover device 14, through which the air can flow laterally into the air intake pipe 10 through circumferential openings (not shown in detail here) (symbolized schematically by the curved arrows). The cover device 14 effectively avoids the penetration of precipitation, in particular rain and coarse dirt particles into the interior volume 12 of the air intake pipe 10. The air intake pipe 10 may consist of or contain a polymer material, such as polypropylene, polyethylene or polyvinyl chloride. Particularly preferred is an air intake pipe 10 made of metal, in particular stainless steel. This is durable and durable, does not corrode and retains a good appearance over many years. In the inner volume 12, a formed from a flat filter material air filter is provided (in Fig.1 A and 1 B not shown), wherein the filter material rests flat on a support surface 18 of a support body 20, in a predetermined position in the inner volume 12 of the air intake pipe 10 is arranged. The support body 20 may be made of metal or contain metal, such as stainless steel or passivated aluminum, more preferably it may consist of or contain a polymer material, such as polypropylene, polyethylene or polyvinyl chloride.

The support surface 18 is provided with a plurality of the support body 20 passing through circular openings 22. Through the openings 22, which are covered by the filter material (not shown in FIGS. 1A and 1B), the sucked air after the flow-on and through the filter surface 24 and the sheet-like filter material 17 can be discharged, as shown in Fig. 1C. FIG. 1C illustrates the shape of the openings 22 in cross-section on the basis of a schematic illustration of a longitudinal section through a partial region of the support body 20 and through the region of the air filter 16 resting on the partial region. The flat filter material 17 is preferably a flow material, which may in particular consist at least partially or wholly of polypropylene.

The support surface 18 is advantageously the shape or the geometry of the filter surface 24 in the inner volume 12 of the air intake pipe 10, so that in this embodiment, the filter surface 24 is formed in the form of a rotation axis 27 about a rotationally symmetrical lateral surface of a cone, in the present case the axis of rotation 27th is arranged in alignment with the longitudinal axis 26 of the inner volume 12. The lateral surface is in this case directed with its tip of the flow direction of the sucked air opposite. The formed in the form of the lateral surface filter surface 24 is formed substantially larger than the cross-sectional area of the inner volume 12, which has a longitudinally constant cross-sectional area in this embodiment.

The embodiment illustrated in FIGS. 2A to 2C differs from the embodiment illustrated in FIGS. 1A to 1C in that the openings 22 passing through the support body 18 are slit-shaped or oblong. In the embodiment illustrated in FIGS. 3A and 3B, the support body 20 has a plurality of spaced and about a common axis 30 concentric annular support elements 28 whose outer diameters are all different from each other, wherein the common axis 30 present with the Longitudinal axis 26 of the inner volume 12 is aligned. The support elements 28 are arranged successively in a direction parallel to the common axis 30 with decreasing outer diameters, specifically to form a conical or essentially conical support body 20. In FIG. 3D, this type of embodiment is illustrated by way of example with reference to six annular support elements 28 , Adjacent support elements 28 are each connected to each other by a web 32.

3E illustrates an alternative embodiment by way of example with reference to six annular support elements. Again, there are neighbors and each other

spaced support members whose diameters are all different from each other, each connected by a web 32 and arranged concentrically to each other about a common axis 30, wherein a first number of first support members 33 and a second number of second support members 34 are provided.

The first support members 33 are sequentially arranged in a direction parallel to the common axis 30 with decreasing outer diameters. The second support elements 34 are arranged successively in this direction with decreasing outer diameters, wherein between two adjacent first support elements 33 each have a single second support element 34 is arranged whose outer diameter is smaller than the outer diameter of each of the adjacent first support elements 33. This alternative embodiment allows in a practical manner, the support of an air filter 16 formed from a flat filter material 17, the filter surface 24 in a longitudinal section of the air filter 16 has a zigzag course, as illustrated in Fig. 3C.

In the embodiment illustrated in FIGS. 4A to 4C, a plurality of spaced-apart plate-shaped air filters 36 is provided, wherein an inflatable filter surface 24 of a plate-shaped air filter 36 faces at least one inflowable filter surface 24 of another plate-shaped air filter 36, and wherein the inflowable filter surfaces 24 of the plate-shaped air filter 36 perpendicular to a transverse direction (in Fig. 4B illustrated by an arrow) of the inner volume 12th are arranged. Based on the schematic representation of the section - through the intended plurality of spaced apart plate-shaped air filters 36 parallel to the flow direction of the sucked air or parallel to the longitudinal axis 26 of the inner volume 12 - the flow and flow through the filter surfaces 24 of the plate-shaped air filter 36 is illustrated by arrows ,

4B also shows that the plate-shaped air filters 36 are releasably attached to a holding device 38, which can be arranged in a predetermined position in the inner volume 12 of the air intake pipe 10. The holding device 38, together with the attached to the holding device 38 plate-shaped air filters 36 via a provided in a wall portion 39 of the air intake pipe 10 closable opening 40 in the predetermined position can be brought or transferred.

FIG. 4C shows a schematic plan view of the plate-shaped air filters 36.

5 shows a schematic representation of a building 42 with a ventilation system 44 which has an inventive air intake pipe 10 in the vicinity of the building 42 and at least one pipe 43 adjoining the air intake pipe 10 (in FIG. 5, only one pipe is shown in simplified form ), which has a section 47 arranged in the ground 46 (further sections may be located in particular in an interior of the building 42). Other components of the ventilation system 44, such as in particular a suction device for sucking in the outside air or ambient air via the air intake pipe 10 are not shown in FIG. 5. The disposed or received in the soil 46 section 47 is advantageously used as an air geothermal heat exchanger, which in the winter, for example, a preheating and summer, for example, a pre-cooling of the intake air.

LIST OF REFERENCE NUMBERS

10 air intake pipe

12 internal volume

14 covering device

16 air filters

17 flat filter material

18 contact surface

20 support body

22 opening

24 filter surface

26 longitudinal axis

27 rotation axis

28 supporting element

30 common axis

32 footbridge

33 first support element

34 second support element

36 plate-shaped air filter

38 holding device

39 wall area

40 opening wall area

42 buildings

43 pipeline

44 ventilation system

46 soil

47 section piping

Claims

claims

1. Luftansaugrohr (10) for a ventilation system of a building, wherein the air intake pipe (10) has a sucked through air through elongated inner volume (12), wherein in the inner volume (12) at least one air filter (16) for filtering the sucked air with a is provided by the sucked air vorströmbaren filter surface (24), wherein the cross-sectional areas of the inner volume (12) a

Have maximum value, characterized in that the filter surface (24) is greater than the maximum value.

2. Air intake pipe (10) according to claim 1, characterized in that the Filterflä- che (24) is greater than or equal to 1, 2 times the maximum value.

3. Air intake pipe (10) according to claim 1 or 2, characterized in that the maximum value is within a range of 0.35 to 7.00 m2.

4. air intake pipe (10) according to any one of the preceding claims, characterized in that the filter surface (24) about a rotation axis (27) is rotationally symmetrical.

5. Air intake pipe (10) according to any one of the preceding claims, characterized in that the filter surface (24) in the form of a about an axis of rotation (27) rotationally symmetrical lateral surface of a cone is formed.

6. air intake pipe (10) according to claim 5, characterized in that the lateral surface is directed opposite with its tip of the flow direction of the sucked air.

7. air intake pipe (10) according to any one of the preceding claims, characterized in that the air filter (16) is formed from a flat filter material (17).

8. air intake pipe (10) according to claim 7, characterized in that the filter material (17) rests on a support body (20) which is arranged in a predetermined position in the inner volume (12) of the air intake pipe (10).

9. air intake pipe (10) according to claim 8, characterized in that the filter material (17) on at least one bearing surface (18) of the support body (20) at least partially rests flat, wherein the support surface (18) with a plurality of the support body (20 ) passing through openings (22) is provided.

10. Air intake pipe (10) according to claim 8 or 9, characterized in that the support body (20) together with the applied filter material (17) via a in a wall region (39) of the air intake pipe (10) provided closable opening (40) in the predetermined position can be brought.

1 1 air intake pipe (10) according to one of the preceding claims, characterized in that the filter surface (24) in a section parallel to the flow direction of the sucked air at least partially has a zigzag course.

12. air intake pipe (10) according to one of claims 1 to 3, characterized in that a plurality of spaced-apart plate-shaped air filters (36) is provided, wherein an inflatable filter surface (24) of an air filter (36) at least one anströmbare filter surface (24). another air filter (36) faces, and wherein the inflowable filter surfaces (24) of the plate-shaped air filter (36) are arranged at an angle to a transverse direction of the inner volume (12).

13. air intake pipe (10) according to claim 12, characterized in that the plate-shaped air filter (36) are releasably attached to a holding device (38) which is arranged in a predetermined position in the inner volume (12) of the air intake pipe (10), wherein the Holding device (38) together with the on the holding device (38) mounted plate-shaped air filters (36) via a in a wall region (39) of the Luftansaugrohrs (10) provided closable opening (40) can be brought into the predetermined position.

14. A ventilation system (44) for a building (42), with an air intake pipe (10) according to one of the preceding claims.

15. Ventilation system (44) according to claim 14, characterized in that the ventilation system (44) has at least one pipeline (43) which is suitable for the inflow of air sucked in via the air intake pipe (10) from the surroundings of the building (42). is provided in an interior of the building (42), wherein at least a portion (47) of the conduit (43) is provided for placement in the ground (46) in the vicinity of the building (42).