Drying container, air dryer assembly and compressed air supply system

Abstract

Dry container (200) with a container outer wall (210) for an air dryer arrangement (100), in particular for a compressed air supply system (1000) for operating a pneumatic system (1001) with a compressed air flow (DL), in particular an air suspension system of a vehicle, preferably a passenger car, wherein - the dry container, by means of a web (220), along a longitudinal extension (LE) of the dry container (200), divides an interior space (215) bounded by the outer wall (210) of the container into a first and a second chamber (230, 240), and the first and second chambers (230, 240) are designed for filling with loose and / or granular filling material (300), wherein the first chamber (230) and the second chamber (240) are pneumatically connected via at least one opening in the web (225), in particular for the passage of compressed air through the at least one opening in the web (225), characterized by the fact that a containment device (250) is installed within at least one of the first or second chambers (230, 240), and extends along the longitudinal extent (LE), wherein the restraint device (250) extends at least sectionally to in front of the at least one opening in the web (225).

Description

[0001] The invention relates to a dry container according to the preamble of claim 1, in particular for a compressed air supply system for operating a pneumatic system with a compressed air flow, in particular an air suspension system of a vehicle, preferably a passenger car.

[0002] Atmospheric air drawn in by a compressor to operate a pneumatic system is more or less humid. This means that the compressor compresses a gas mixture consisting of air and water vapor. The saturation point (dew point) of the water vapor content depends on the air temperature and the relative humidity. While the absolute humidity remains constant as the compressed air warms, the maximum amount of water vapor it can hold increases. Conversely, when the temperature drops, the water vapor condenses and is released from the air as water.

[0003] To ensure the long-term operation of a compressed air supply system, it is equipped with an air dryer to dry the compressed air. This prevents the accumulation of moisture in the compressed air supply system, which could otherwise lead to valve-damaging crystal formation and other undesirable effects in the compressed air supply system and the pneumatic system, especially at relatively low temperatures.

[0004] An air dryer contains a desiccant, usually a loose and / or granular filling material, e.g., in the form of a bed of granules, through which compressed air flows. This allows the filling material to absorb moisture contained in the compressed air through adsorption at relatively high pressure. It has proven effective to house this loose and / or granular filling material, also referred to below as loose desiccant granules, in a separate, replaceable desiccant container, e.g., a dryer cartridge, which is inserted into a dryer housing. Various design approaches are employed; for example, there are single-chamber and dual-chamber air dryers.

[0005] The regeneration process in an air dryer can occur during emptying – an example is explained in EP 1 233 183 A1. In a dual-chamber air dryer, this can be controlled via a solenoid valve with an integrated timer. This method ensures that the granules retain their absorbency even with extended compressor operating times. Dual-chamber air dryers are therefore typically used in vehicles with high air consumption and correspondingly frequent regeneration cycles.

[0006] In a two-chamber drying container as described above, the drying container has an interior space bounded by a web along a longitudinal extension of the container and separated from the outer wall of the container. This interior space is divided into a first and a second chamber, the first and second chambers being designed for filling with loose and / or granular filling material. The first and second chambers are pneumatically connected via at least one opening in the web. Such a two-chamber drying container of the type described above is known from DE 10 2012 005 308 A1. In this sense, such a two-chamber drying container essentially has a drying bed for guiding a compressed air flow in a U-shaped or alternating counter-rotating pattern within an arrangement of annular spaces. The drying container or the granules within it can be easily replaced.Secondly, by guiding the compressed air flow through the annular spaces it flows through, the dryer bed is lengthened, thus improving the drying of the compressed air.

[0007] The problem with such a two-chamber dry container is maintaining the pressure amplitude required for the operation of a pneumatic system.

[0008] This problem arises particularly with regard to the two-chamber drying container of the type mentioned above according to DE 10 2012 005 308 A1, in which dry granules are loosely filled, and especially when the length of the two-chamber drying container is to be reduced with regard to installation requirements. This usually also results in smaller dimensions for passages or openings of the flow path in the web of the two-chamber drying container, but these can, on the other hand, become more easily clogged by the loosely filled dry granules.

[0009] It is desirable – even with loose and / or granular filling material and high pressure fluctuation amplitudes, as well as possibly smaller passages or openings in the flow path – to avoid clogging of the passages or openings in a more compact design of the dry container, and in particular to avoid significant pressure drops due to unintentionally increased resistance in the flow paths.

[0010] This is where the invention comes in, the object of which is to provide a drying container, an air dryer arrangement and a compressed air supply system in which clogging of the passages or openings is avoided, in particular to avoid significant pressure drops due to unintentionally increased resistance in the flow paths; this is especially true when loose and / or granular filling material is filled in and high pressure fluctuation amplitudes are present, as well as possibly smaller passages or openings of the flow path in a more compact design of the drying container.

[0011] The problem is solved by a drying container of claim 1.

[0012] Such a drying container has an outer container wall for an air dryer arrangement, in particular for a compressed air supply system for operating a pneumatic system with a compressed air flow, in particular an air suspension system of a vehicle, preferably a passenger car, wherein - the dry container has an interior space bounded by a web along a longitudinal extension of the dry container, which is divided into a first and a second chamber, wherein the first and second chambers are designed for filling with loose and / or granular filling material.

[0013] The first chamber and the second chamber are pneumatically connected via at least one opening in the bridge. In particular, the first chamber and the second chamber are fluidly connected for the purpose of introducing compressed air through the at least one opening in the bridge.

[0014] According to the invention, a retention device is provided within at least one of the chambers. The retention device extends along the longitudinal dimension, extending at least section by section to in front of the at least one opening in the web.

[0015] The invention is based on the premise that a two-chamber drying container of the type mentioned above, particularly in a more compact design, has proven effective for high pressure amplitudes. However, an undesirably increased resistance in the flow paths cannot be countered by simply making the passages or openings arbitrarily large. The invention further considers that, even with a more compact design of the drying container, the ability to prevent clogging of potentially smaller passages or openings in the flow path should be ensured to maintain high pressure fluctuation amplitudes and thus enable the best possible regeneration capacity of the loose and / or granular filling material.

[0016] The invention has recognized that this can be achieved by means of a retention device for a loose and / or granular filling material without adversely affecting the pressure change amplitude, i.e., by means of a retention device within at least one of the chambers of the two-chamber dry container.

[0017] According to the invention, the retention device extends along the longitudinal dimension, extending at least section by section to the at least one opening in the web. This has the advantage that the compressed air flow in other parts of the drying vessel remains largely unaffected, while in the immediately vulnerable area the loose and / or granular filling material is retained by the at least one opening in the web; i.e., a good compromise is reached between maintaining the best possible regeneration capability of the dryer and protecting the narrower sections in the flow path, i.e., by extending the retention device at least section by section to the at least one opening in the web.

[0018] The invention also relates to an air dryer arrangement with a drying container according to the concept of the invention, wherein the first and a second chamber are filled with loose and / or granular filling material and the compressed air flows through in a U-shape from the first chamber to the second chamber for drying, or in a U-shape and in the opposite direction from the second chamber to the first chamber for regeneration of the granular filling material or desiccant.

[0019] The invention also relates to a compressed air supply system for operating a pneumatic system with a compressed air flow, in particular an air suspension system of a vehicle, preferably a passenger car with an air dryer arrangement according to the concept of the invention, in particular an air dryer arrangement in a pneumatic main line, which is pneumatically connected to the pneumatic system via a compressed air supply from an air compressor and a compressed air connection.

[0020] Advantageous further developments of the invention can be found in the dependent claims and specify in detail advantageous possibilities for realizing the concept explained above within the scope of the task and with regard to further advantages.

[0021] Preferably, the first and second chambers are bounded by the web and the outer wall of the container, with the web abutting the outer wall of the container along its longitudinal extent, and the first and second chambers being arranged side by side along their longitudinal extent. In particular, the opening in the web is positioned diametrically opposite a compressed air supply to the drying container.

[0022] Advantageously, the retaining device has a section along its longitudinal extent that projects over a portion of the opening, with the section completely or partially covering a cross-section of the opening. The section can lie on the cross-section or be spaced from it, transverse to the cross-section and / or longitudinal extent, particularly along a compressed air passage. Furthermore, the retaining device can advantageously extend completely over the at least one opening in the web along its longitudinal extent.

[0023] Advantageously, the retention device is positioned at a distance from the opening, leaving a gap. This creates a space in front of the openings, preventing not only pressure loss and clogging, but also ensuring that the efficiency of the air dryer is not significantly impaired. This gap can be designed particularly effectively by incorporating a flexible retention membrane and / or a rigid spacer. The rigid spacer is advantageously sufficiently stable to guarantee at least a reasonable amount of clearance. The flexible retention membrane is advantageously flexible enough to conform to loose granules.

[0024] Advantageously, the filling material is prevented by the retention device from being carried into and / or in front of the opening between the first and second chambers, particularly when subjected to a compressed air flow. This is especially true for a loose and / or granular filling material, such as a bulk material with a specific average particle size larger than the cross-section of the opening.

[0025] This can be achieved particularly advantageously by forming the retention device, in particular a flexible retention membrane as described above, with a net-like, sieve-like, or grid-like mesh. Preferably, the retention device, in particular a flexible retention membrane, is permeable to compressed air. For this purpose, it can preferably be made of uniformly perforated material or formed with a net-like, sieve-like, or grid-like mesh. In particular, a flexible retention membrane as described above preferably has a permeability that is smaller than the average particle size of the filling material. It is advantageously provided that the retention device, in particular a flexible retention membrane, is formed in the form of a tube, e.g., a sleeve, cuff, or the like, or in the form of a planar flexible element.

[0026] The opening diameter of the containment device is advantageously smaller than the cross-section of the opening in the web, and the loose and / or granular filling material is formed as a bulk material and has a specific average particle size. The particle size is approximately the same order of magnitude as the cross-section of the opening or larger than the cross-section of the opening. More generally, it is advantageous for each initial opening diameter of the containment device, e.g., in the spacer, to be smaller than the cross-section of the opening in the web, and / or for each subsequent opening diameter of the containment device, e.g., in the flexible containment membrane, to be smaller than the average particle size of the filling material. This reliably prevents filling material of the specified average particle size from becoming lodged in the opening in the web and obstructing or blocking the flow of compressed air.

[0027] Advantageously, the retaining device, in particular the aforementioned spacer, is formed by means of a shoulder on the web, specifically the shoulder being formed as a pin, support rib, or similar projection. This allows the spacer to be easily integrated into the manufacturing process, specifically with the drying container, particularly a two-chamber drying container.

[0028] Advantageously, the retention device extends at least completely over the at least one opening in the web in its longitudinal dimension, and in particular overlaps the opening while leaving a gap. This ensures that the advantages of the invention are achieved particularly reliably. It is also advantageous that the retention device, in particular a flexible retention membrane, also covers the bottom of the drying container. This ensures that the flexible retention membrane is securely positioned within the drying container.

[0029] Advantageously, a free space is provided, spaced apart from the opening on each side of the opening in the web. This ensures the advantages of the invention even in the event of a flow reversal.

[0030] It is advantageous that the free space extends along the outer wall of the container. This also ensures that the flexible retention membrane sits securely in the dry container and reliably prevents dry granules from entering an unwanted area between the flexible retention membrane and the outer wall of the container.

[0031] Advantageously, a retained free space is provided, essentially cylindrically spaced from the opening on each side of the opening in the web, and extends along the outer wall of the container. This ensures the advantages of the invention even in the event of flow reversal. In particular, the free space extends to the bottom of a chamber. It is especially advantageous that the retention device comprises a first retention device in the first chamber and a second retention device in the second chamber. A retention device in each chamber offers a high degree of reliability.

[0032] An air dryer arrangement according to the concept further advantageously includes a compressor and a drive for the compressor for generating dried compressed air, in particular for an operating pressure of up to 20 bar.

[0033] Embodiments of the invention are now described below with reference to the drawing. The drawing is not necessarily intended to represent the embodiments to scale; rather, where explanatory, it is presented in a schematic and / or slightly distorted form. With regard to additions to the teachings directly apparent from the drawing, reference is made to the relevant prior art. It should be noted that numerous modifications and changes concerning the form and detail of an embodiment can be made without deviating from the general idea of ​​the invention. The features of the invention disclosed in the description, the drawing, and the claims can be essential for the further development of the invention, both individually and in any combination.Furthermore, the invention encompasses all combinations of at least two of the features disclosed in the description, the drawing, and / or the claims. The general idea of ​​the invention is not limited to the exact shape or detail of the preferred embodiment shown and described below, nor is it limited to an object that would be restricted compared to the object claimed in the claims. For specified dimensioning ranges, values ​​lying within the stated limits are also disclosed as limit values ​​and may be used and claimed as desired. For the sake of simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar functions. Further advantages, features, and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing; this is shown in: Fig. 1A, Fig. 1B a perspective view of a compressed air supply system, according to a preferred embodiment, comprising an air dryer arrangement which has a drying container with two chambers, as well as a pneumatic main line, an air compressor, a valve arrangement and a motor for operating the air compressor (A) and a vehicle with a compressed air supply system; Fig. 2 a cross-section through a preferred embodiment of an air dryer arrangement, comprising, among other things, a drying container which is divided into a first chamber and a second chamber, the filling material of the drying container and a retention device for the filling material with the associated free space in front of the opening of the web; Fig. 3 a schematic view of the air dryer arrangement, showing the course of the airflow through both chambers of the drying container and the retention device, comprising a flexible retention membrane and a spacer, as well as the free space formed thereby in front of an opening in the web;

[0034] Fig. Figure 1A shows a perspective view of an embodiment of the compressed air supply system 1000, which is designed here to supply a pneumatic system, e.g. in the form of an air suspension system of a passenger car, comprising a motor 700 for driving an air compressor 400. Air to be compressed is supplied to the air compressor 400 from the atmosphere as a compressed air flow DL and forwarded to an air dryer arrangement 100.

[0035] Fig. Figure 1B shows the compressed air supply system 1000 for a vehicle 20 for operating a pneumatic system 10 with a compressed air flow DL—here for an air suspension system with an exemplary first and a second air spring 12 on a gallery 11 thereof—in particular, the pneumatic system 10 in the form of an air suspension system of a vehicle 20. However, brake systems or other pressure consumers on the vehicle 20 can also be connected to the compressed air supply system 1000, preferably in the case of a passenger car with an air dryer arrangement 100. In this case, a drying tank 200 of the air dryer arrangement 100 is arranged in a main pneumatic line 5, which is pneumatically connected to the pneumatic system 10 via a compressed air supply 1 from an air compressor 400 and a compressed air connection 2 to a gallery 11. A vent line 4 also leads from the compressed air supply 1 to a vent 3.

[0036] The air dryer arrangement 100 includes the drying container 200, wherein a first and a second chamber 230, 240, as described below, are filled with loose and granular filling material 300. Furthermore, the air compressor 400 and a motor 700 for the air compressor 400 are provided for generating the compressed air flow DL of dried compressed air, particularly for an operating pressure in the range of 10 to 30 bar.

[0037] The in Fig. 1A and Fig. The air dryer arrangement 100 shown in 1B is in Fig. 2 is described in more detail and has a drying container 200, with a first chamber 230 and a second chamber 240, which are filled with a filling material 300 not shown here. According to the Fig. In the housing assembly, motor 700 and compressor 400 form a housing assembly, with the compressor 400 serving as a central monoblock and delivering the compressed, dried air via a connection 600 to gallery 11 and then to the air springs 12 of the pneumatic system 10. The air dryer assembly 100 and the valve assembly 500 can be attached to this housing assembly along a longitudinal extension LE. In particular, the air dryer assembly 100 is interchangeably mounted on the housing assembly.

[0038] Due to the modular design of the air dryer assembly 100 and the valve assembly 500, the functionalities of the dryer function on the one hand and the compressed air control function on the other hand are spatially separated.

[0039] Fig. Figure 2 shows the drying container 200 of the air dryer assembly 100 as a separate component. In this embodiment, a first chamber 230 and a second chamber 240 are bounded by a web 220 and the outer wall 210 of the container, the web 220 adjoining the outer wall 210 along its longitudinal extent LE, and the first chamber 230 and the second chamber 240 being arranged side by side along their longitudinal extent LE. In the preferred embodiment shown, the first and second chambers 230 and 240 have substantially the same internal volumes, with the web 220 extending along a predominantly central longitudinal axis LA of the drying container 200 following its longitudinal extent LE. The bridge 220 connects primarily in one piece, along a longitudinal extension LE, to the outer wall of the container 210 and divides the interior 215 of the dry container 200 into a first chamber 230 and a second chamber 240.The first and second chambers 230 and 240 shown are arranged side by side and each is designed as a cylindrical tube, bounded by the web 220 and the outer wall 210 of the container. Specifically, the first chamber 230 has a first boundary section extending substantially along its longitudinal extent LE, which is formed primarily by a first outer longitudinal side 213 of the outer wall 210 of the container. Laterally, the first chamber 230 is bounded by an inner surface of the web 220 on the chamber side and a first outer longitudinal side 213. The second chamber 240 has a second boundary section extending substantially along its longitudinal extent LE, which in this case is formed by a second outer longitudinal side 214 of the outer wall 210 of the container. Laterally, the second chamber 240 is bounded by an inner surface of the web 220 on the chamber side and the second outer longitudinal side 214.The first and second chambers 230, 240 are bounded on their upper sides by a third boundary element, namely a top surface 211 of the outer wall 210 of the container, which is formed essentially transversely to the longitudinal extent LE. Both chambers 230, 240 are bounded on their lower sides by a corresponding bottom surface 212 of the outer wall 210 of the container. The bottom surface 212 of the first chamber 230 has a compressed air inlet 1 and the second chamber has a compressed air outlet 2. The web 220 connects the top surface 211 and the bottom surface 212 of the outer wall 210 of the container essentially along the longitudinal extent LE.

[0040] In this case, the web 220 is integrally, i.e., integrally, connected to the top and bottom surfaces 211, 212. The web can also be slidably mounted to allow, if necessary, pneumatic actuation of the distance between the web end 221 and the inside of the head 216 of the outer wall of the container 210, and thus the nominal diameter of the opening 225 in the web 220. This can be used to create a variable-diameter throttle by means of the opening 225 in the web.

[0041] In both chambers, 230, 240, a surface is present on the inside of the head side 216 of the outer wall of the container 210, in Fig. 3. The retaining device 250.1, 250.2, described in more detail below, is attached and is addressed together here for simplicity. According to the concept of the invention, the retaining device 250 extends along the aforementioned longitudinal extent LE, extending at least partially to the at least one opening in the web 225. Specifically, this means that, as shown in the illustration, Fig. 3 The restraint device 250 has a section A along the longitudinal extent LE which projects over an area of ​​the opening 225, wherein the section A completely covers a cross-section 225Q of the opening 225 here --but in another embodiment may only partially cover it.

[0042] Section A is located in this area. Fig. In the embodiment shown in Figure 3, the retaining device 250 is not located on the cross-section 225Q, but is spaced transversely to the cross-section 225Q and along its longitudinal extent by a distance d, i.e., along a compressed air flow direction DL from the cross-section 225Q. The retaining device 250 extends completely along its longitudinal extent LE over the at least one opening in the web 225.

[0043] The shape of the restraint device 250, in this case the first and second restraint devices 250.1, 250.2, is designed such that it creates a free space 260 in front of both sides of the opening in the web 225 – in this case, a first free space 260.1 and a second free space 260.2. This applies equally to an embodiment in which the web is slidably mounted and the nominal width of the opening in the web 225 is variable.

[0044] The term free space 260 is, therefore, due to the given geometry, to be understood generally as the entirety of all free spaces 260.1, 260.2 etc. that form within the drying container 200; a division of these is to be understood from Fig. 3 visible. Fig. Figure 3 shows a schematic view of the air dryer arrangement 100, with a depicted course of the compressed air flow DL through both chambers 230, 240 of the drying container 200 filled with filling material 300.

[0045] The compressed air flow DL follows a U-shaped path with opposing directions R1 and R2 along the longitudinal extent LE of the drying container 200 and is directed into the first chamber 230 from a compressed air inlet 1 (not shown in this figure). Through an opening in the web 225, the compressed air flow DL enters the second chamber 240 and, in the opposite direction to flow R1, is now directed in a flow direction R2 to a compressed air outlet 2 (not shown in this figure), through which it exits the drying container 200.

[0046] The filling material 300 located in both chambers 230, 240 is retained by a first and second retention device 250.1, 250.2, respectively. Each of the first and second retention devices 250.1, 250.2 has a first and second flexible retention membrane 251.1, 251.2 and a first and second rigid spacer 252.1 and 252.2 in front of the opening 225 in the web 220, forming a free space 260. For this purpose, the retention device 250 can be functionally subdivided into two parts, namely a flexible retention membrane 251 and a spacer 252 – it can therefore consist of two parts or, in another embodiment, be formed in one piece.

[0047] The first and second flexible retention membranes 251.1, 251.2 are permeable to compressed air. They can, for example, be made of a uniformly perforated material M or be formed with a net-, sieve- or grid-like mesh G, as is the case in Fig. Figure 3 is shown schematically. In this embodiment, each of the first and second flexible retention membranes 251.1, 251.2 is formed with a net-, sieve-, or grid-like mesh G and each has a permeability w1 that is smaller than the average particle size 300Q of the filling material 300, which is shown here only symbolically as a single particle. The loose and / or granular filling material 300 is a bulk material that has a specific average particle size 300Q. The average particle size 300Q can be on the order of the cross-section of the opening 225 or larger than the cross-section 225Q of the opening 225.

[0048] The fundamental risk of the opening becoming clogged no longer exists, since the filling material 300 located in both chambers 230, 240 is retained by a first and second retention device 250.1, 250.2.

[0049] The passage width w2 of the restraint device 250 is, in particular, smaller than the cross-section 225Q of the opening 225 in the web 220. As in Fig. As can be seen in Figure 3, a first passage width w1 of the retention device 250 is therefore less than a mean grain size 300Q of the filling material 300 and a second passage width w2 of the retention device 250 is less than a cross-section 225Q of the opening 225 in the web 220.

[0050] In the present embodiment, the retention device 250 is in the shape of a cylinder closed towards the top 211. The flexible first and second retention membranes 251.1, 252.2 each extend substantially along the longitudinal extent LE in a first chamber 230 parallel to an inner surface of the web 220 on the first chamber side and a first outer longitudinal side 213, and in a second chamber 240 parallel to an inner surface of the web 220 on the second chamber side and a second outer longitudinal side 214. The retention device 250, with its first and second flexible retention membranes 251.1, 251.2 – each in the form of a tube, e.g., a sleeve, cup, cuff, or the like – is thus formed as a single, planar, flexible element.

[0051] The first and second spacers 252.1, 252.2 are each formed by means of a rigid element, which is inserted as a core in the first and second chambers 230, 240 and held on the bridge 220. In principle, a first and second spacer can also be formed more simply, e.g., as a shoulder, pin, support rib, or similar projection on the bridge 220 or on the inside of the housing.

[0052] The retention device 250 is limited in length by an inner side of the head end 216, towards the top 211 of the drying container 200, and essentially by the end of the web 221 in the opposite direction. The spacer 252 runs transversely to the longitudinal extent LE and, in a shape similar to a fold, is attached orthogonally to the flexible retention membrane 251. The length of the spacer 252, starting from the inner sides of the web 220 in the first and second chambers 230, 240, determines the size of the free space 261 in front of the opening in the first chamber 230 and the size of the free space 263 in front of the opening 225 in the second chamber 240. In the embodiment shown, the free spaces formed in front of the outer longitudinal sides 262 and 264 are equivalent to the free spaces 261, 263 in front of the openings in the first and second chambers 230, 240 due to the symmetrical design of the retention device 250 around the respective chamber axes K1 and K2.

[0053] In another embodiment, in which the web 220 is slidably mounted and the nominal width of the opening 225 in the web 220 is accordingly variable, the free space 260 is larger by means of a longer flexible retention membrane 251 corresponding to the play of the nominal width of the opening 225 in the web. Reference numeral list (part of the description) 1 Compressed air supply 2 Compressed air discharge 3. Ventilation 4. Vent line 5 Compressed air main line 10 Pneumatic system 11 Gallery 12 air spring 100 air dryer arrangement 200 drying containers 210 Container outer wall 211 Top 212 Underside 213 first outer longitudinal side 214 second outer longitudinal side 215 Interior of the drying container 216 Inside of the head side 220 Steg 221 end of the bridge 225, 225Q Opening in the web, cross-section of the opening 230 first chamber 240 second chamber 250 Retention device for retaining the filling material 250.1, 250.2 first, second restraint facility 251.1, 251.2 flexible retention membrane 252.1, 252.2 first, second spacer 260, 260.1, 260.2 Free space, first, second free space 261 Free space before opening in first chamber 262 Free space in front of first outer long side 263 Free space before opening in second chamber 264 Free space in front of the second outer long side 300, 300Q Filling material, cross-section of the filling material 400 air compressors 500 valve arrangement 600 Connection for compressed air to a pneumatic system 700 engine 1000 compressed air supply system A section of the restraint system d distance DL compressed air flow K1 first chamber axis K2 second chamber axis LA Longitudinal axis LE Longitudinal extent R1 first direction of compressed air flow R2 second direction of compressed air flow

Claims

Drying container (200) with a container outer wall (210) for an air dryer arrangement (100), in particular for a compressed air supply system (1000) for operating a pneumatic system (1001) with a compressed air flow (DL), in particular an air suspension system of a vehicle, preferably a passenger car, wherein the drying container, by means of a web (220), along a longitudinal extension (LE) of the drying container (200), divides an interior space (215) bounded by the container outer wall (210) into a first and a second chamber (230, 240), and the first and second chambers (230, 240) are designed for filling with loose and / or granular filling material (300), wherein the first chamber (230) and the second chamber (240) are pneumatically connected via at least one opening in the web (225), in particular for supplying compressed air through the at least one opening in the web (225). fluid-connected, characterized bythat a retaining device (250) is installed within at least one of the first or second chambers (230, 240) and extends along the longitudinal extent (LE), wherein the retaining device (250) extends at least sectionally to in front of the at least one opening in the web (225). Dry container (200) according to claim 1, characterized in that the retention device (250) has a section (A) along the longitudinal extent (LE) which projects over a region of the opening, wherein the section (A) completely or partially covers a cross-section (225Q) of the opening (225). Dry container (200) according to claim 1 or 2, characterized in that the section (A) lies on the cross-section (225Q) or is spaced apart from the cross-section (225Q) transversely to the cross-section (225Q) and / or the longitudinal extent, in particular along a direction of passage of compressed air from the cross-section (225Q). Dry container (200) according to one of claims 1 to 3, characterized in that the retention device (250) extends completely along the longitudinal extent (LE) over the at least one opening in the web (225). Drying container (200) according to one of claims 1 to 4, characterized in that the opening in the web (225) is arranged diametrically to a compressed air supply (1) of the drying container (200). Dry container (200) according to one of claims 1 to 3, characterized in that the retention device (250) overlaps the opening (225) at a distance, leaving a free space (261, 263), in particular the retention device (250) is held at a distance from the opening (225) while leaving the free space (261, 263). Dry container (200) according to one of claims 1 to 6, characterized in that the retention device (250) comprises a flexible retention membrane (251.1, 251.2) and / or a rigid spacer (252.1, 252.2). Dry container (200) according to one of claims 1 to 7, characterized in that the filling material (300) is prevented by the retention device (250) from being carried into and / or in front of the opening (225) of the bridge (220) between the first and second chamber (230, 240), in particular under the influence of a compressed air flow (DL). Dry container (200) according to one of claims 1 to 8, characterized in that a passage width of the retention device (250) is smaller than a cross-section (225Q) of the opening (225) in the web (220) and / or the loose and / or granular filling material (300) is a bulk material and has a certain mean particle size (300Q) which is on the order of a cross-section of the opening (225) or larger than a cross-section (225Q) of the opening (225). Dry container (200) according to one of claims 1 to 9, characterized in that the retention device (250), in particular a flexible retention membrane (251.1, 251.2), is permeable to compressed air, in particular is formed with a preferably uniformly perforated material (M). Dry container (200) according to one of claims 1 to 10, characterized in that the retention device (250), in particular a flexible retention membrane (251.1, 251.2), is formed with a net-, sieve- or grid-like mesh (G). Dry container (200) according to one of claims 1 to 11, characterized in that a passage width (w1, w2) of the retention device (250) is smaller than a cross-section (225Q) of the opening (225) in the web (220) and / or a passage width (w1, w2) of the retention device (250) is smaller than a mean particle size (300Q) of the filling material (300). Dry container (200) according to one of claims 1 to 12, characterized in that the retention device (250), in particular a flexible retention membrane (251.1, 251.2), covers the bottom of the dry container (200). Dry container (200) according to one of claims 1 to 13, characterized in that a free space (260) left by the retention device (250) is created, which is spaced apart from the opening (225) of the web (220) on each side of the opening (225) in the web (220). Dry container (200) according to one of claims 1 to 14, characterized in that the free space (260) extends along the outer wall (210) of the container. Dry container (200) according to one of claims 1 to 15, characterized in that a free space (260) is substantially cylindrically spaced from the opening (225) on each side of the opening in the web (220) and extends along the outer wall (210) of the container. Dry container (200) according to one of claims 1 to 16, characterized in that a free space (260) extends to a bottom space of one of the first and / or second chambers (230, 240). Dry container (200) according to one of claims 1 to 17, characterized in that the retention device (250) comprises a first retention device (250.1) in the first chamber and / or a second retention device (250.2) in the second chamber (230, 240). Air dryer arrangement (100) with a drying container (200) according to one of the preceding claims, wherein the first and a second chamber (230, 240) are filled with loose and / or granular filling material (300), and has an air compressor (400) and a motor (700) for the air compressor (400) for generating a compressed air flow (DL) of dried compressed air, in particular for an operating pressure in the range of 10 to 30 bar. Compressed air supply system (1000) for operating a pneumatic system (10) with a compressed air flow (DL), in particular an air suspension system of a vehicle (20), preferably a passenger car, with an air dryer arrangement (100) according to claim 19, in particular with an air dryer arrangement (100) in a pneumatic main line, which is pneumatically connected to the pneumatic system via a compressed air supply (1) from an air compressor (400) and a compressed air connection (2).

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