DE102004059799A1 - A method for integrating the filter and dryer into the condenser of a motor vehicle air conditioning system has a dryer and filter system in the outlet duct - Google Patents

Abstract

An inlet duct (4) leads to a reservoir duct (6a) having dividing walls (3b,d,f) and an outlet duct (6b) having dividing walls (3c,e) which direct the refrigerant flow through single tubes (7a,b,c) and combined tubes (7d). A dryer (22) and filter (24) are in the outlet duct (5).

Description

The The present invention relates to an apparatus for replacement of heat, especially for Motor vehicles. Such devices are for the exchange of heat known from the prior art. A class of such devices that used for example for air conditioning purposes of vehicle interiors be, usually have a condenser and a collector. It serves the collector as a reservoir for a refrigerant, to the function of the refrigeration cycle via a desired Duration even with low refrigerant loss to ensure. Next to it the collector a buffer function for the refrigerant at density changes as a result of changes in the Plant operating state, such as a change the ambient temperature. Another task of the collector is to supply the expansion valve with bubble-free refrigerant and after all the collector is still used to hold the filter and / or dryer unit.

Out The prior art devices are known in which the Capacitor and the collector are arranged as separate components, the above a liquid line connected to each other.

there contains the collector a filter and a dryer. At the standstill The device known in the art forms the additional device Together with the collector a separate unit, which in case of service completely changed. In addition, this concept becomes one additional liquid line as well as additional Fittings for mounting the collector / filter / dryer unit necessary. In this way, results from the prior art, a certain construction costs in the manufacture or in the service of these devices for Exchange of heat. In addition, all have solutions from the prior art, at least one additional detachable screw for changing of the filter dryer.

From the DE 100 18 478 A1 For example, a condenser is known in which a collector is formed from a plurality of tubes connected in series. However, no filter / dryer unit is provided in this device.

Of the The invention is therefore based on the object, the construction cost of a Heat exchanger too reduce. The inventive concept should be synonymous for suitable for such devices, without separate collector volume get along with phase separation. This object is achieved by a device for exchanging heat, in particular for a motor vehicle, solved, the at least one feed tube for a flowable medium, at least one collection and / or distribution pipe, a plurality of Flow tubes and at least one drain pipe for the flowable medium having. At least one of these is in at least one section these tubes an additional device for influencing at least a physical property of the flowable medium.

Under the feed tube or the drainage pipe are understood in their entirety the pipes, which the device from the exchange of heat with other facilities a refrigeration cycle, such as the Ex expansion valve, the evaporator or the Connect compressor. Therefore, the attachment on each Location of the respective feed or drain pipes be arranged, so spatially closer to other components, as the device for exchanging heat itself be located.

The inventive device has the advantage that a tube in which the auxiliary device is arranged, can be used multiple times; on the one hand in his Function as a line, on the other hand to influence the physical Property. In this way, a space reduction can be achieved become.

Prefers the additional device has at least one drying device on. Furthermore, the additional device has at least one filter device on. In a preferred embodiment the additional device both a dryer and a filter device on, wherein particularly preferably the space occupied by the refrigerant so small as possible is held.

Prefers is an additional device either in the collection and / or distribution pipe or provided in one of the flow tubes or in the drainage tube, wherein particularly preferably exactly one additional device in exactly one of the tubes is arranged.

at the flowable medium it is a liquid or gaseous Medium, which the heat exchange serves. The following will be for the flowable medium also the term refrigerant uses.

In a preferred embodiment serves the section of the pipe in which the auxiliary device is housed is, even as a housing for the Additional device.

The Collection and / or distribution pipe serves to the refrigerant on a variety of flow tubes to distribute or out collecting flowable medium exiting the flow tubes.

The inventive device has the advantage that in the prior art additional high volume Collector, who usually is arranged parallel to the manifold, and therefore eliminates the construction cost is reduced. In addition, omitted also the effort for additional Connecting pipes and fittings.

In a preferred embodiment indicates the section of the tube in which the attachment is arranged is opposite the adjacent sections on an enlarged cross section. This means, that if the attachment arranged in one of the flow tubes is, this at the appropriate place or the appropriate section has an expanded cross-section compared to the other sections the same tube or the cross sections of the other flow tubes. This enlarged section On the one hand serves the additional device with a sufficient Absorb amount of desiccant in their cross-section and on the other hand also preferred to the pressure loss of the flowing medium in certain To keep borders. Especially for the latter reason, the inner diameter the pipe section to be executed by a defined amount greater as the outer diameter the additional device located therein. Preferably, the Tube section internal support means have, by which the auxiliary device is kept centric. Particularly preferred, alternatively, the additional device in certain intervals Proppant, z. B. nubs, to a substantially constant annular gap form between the pipe section and the auxiliary device.

at a further preferred embodiment the auxiliary device is arranged in the drain pipe for the refrigerant. To this end preferably also has the drainpipe at the point at which the additional device is arranged, an enlarged cross-section on. This arrangement of the additional device has the advantage that the additional device is relatively easily accessible in case of service and therefore be replaced without or with little effort can. In addition, the drain pipe itself as a housing for the additional device be used.

at a further preferred embodiment is the auxiliary device in a flow tube, that is, in at least a section of at least one flow tube arranged. In this embodiment Therefore, the additional device is integrated directly into the heat exchanger assembly. Preference is given to the additional device in a flow tube arranged, which is substantially end to the manifold is arranged. In this embodiment a plurality of flow tubes is substantially parallel arranged on the manifold d. H. the individual flow tubes are arranged substantially parallel to each other. In one of the both end manifolds located in this embodiment, the Additional device. Preferably, for this purpose, the corresponding Flow tube on an extended cross-section. Especially preferred this is the flow direction of the refrigerant last flow tube, that is, following the flow tube follows in this embodiment the drainpipe for the flowable medium.

In a further preferred embodiment At least one tube has at least one detachable section, preferably with a screw thread, on. This means that in one embodiment the drainpipe a detachable Section, wherein after its dissolution preferred the collector and / or drying device are removed from the drain pipe can. In a further preferred embodiment, the flow tube, in which the auxiliary device is arranged, such releasable Section, so that in the case of servicing this section can be solved and the additional device removed from the respective flow tube can be.

at a particularly preferred embodiment is the solvable Section arranged in an area between two components of a refrigeration cycle.

there It should be noted that such refrigeration circuits, which several components, such as evaporators, compressors or expansion valves have, in the prior art releasable connections between have the individual components.

Becomes now using one of these connections as a service opening at the same time, so is no extra Service opening necessary, which increases the system tightness.

Prefers is therefore the solvable Section on the pipe, that is to say preferably on the flow or drain pipe, arranged that after the release of the section, the additional device preferably without additional Auxiliary tools or manually removed from the section of the tube can or can be used in the section of the tube.

In a further preferred embodiment, at least two of the flow tubes have sections with mutually different cross cut open. In this case, on the one hand the flow tube, in which the drying and the filter device is arranged, have a modified, in particular larger, cross section than the other flow tubes. On the other hand, however, the flow tubes, in which the additional device is not arranged, have mutually different cross-sections. In this way, the device can be adapted to the changing density of the different flow behavior of the refrigerant on its way through the device for exchanging heat.

In a further preferred embodiment has the flow tube in which the attachment arranged is preferably at least a portion of, which passes through the manifold passed becomes. In this way, also the flow tube, in which the additional device is arranged opposite the manifold and thus opposite the complete heat exchange device can be stabilized.

In a further preferred embodiment indicates the flow tube in which the auxiliary device for influencing at least one physical property of the flowable medium is arranged, preferably at least one curved portion. Also the curved Section is preferably used to connect a drain pipe. In this Case is preferably a holding device provided to the pipe end with the respective connection fitting for the drainpipe in position to hold. In a further embodiment can also be on the curved Omitted section and instead the flow tube, in which the attachment is provided, a lateral opening to Have connection of the drain pipe.

In a further preferred embodiment has the detachable Section of the flow tube in which the attachment arranged is, at least one connection on, which consists of a group of compounds selected which contains clamp connections, screw connections and the like. there are preferably releasable compounds, which is provided so that in case of service, the additional device can be removed from the respective flow tube.

In a further preferred embodiment ends the flow tube in which the attachment is arranged, in a screw connection. This gland is preferably used for connection a drain pipe to the device for the exchange of heat.

In a further preferred embodiment At least one tube has a cross-section which consists of a group selected from cross sections which is essentially circular, elliptical, rectangular, polygonal cross sections and mixed forms thereof.

at a further preferred embodiment the attachment has at least one flexible section on. This flexible section serves to supplement the accessory more easily insert into the appropriate drain or flow tube to be able to. In the flexible section, the drying device is preferred or a drying agent arranged.

In a further preferred embodiment the additional device has at least one rigid section. In this case, at least one filter element is preferred in this rigid section arranged. In a further preferred embodiment, the dryer section longer as the filter section. Preferably, the dryer section via a given part of the total length a flow or drain pipe particularly preferred in the case a flow tube over its substantially entire length extend. The advantage of this embodiment is that the Drying over a comparably large one length range the relevant flow or drain pipe can take place. In a further preferred embodiment, the additional device is spatially subdivided in a section containing the dryer device and a another section containing the filter device. The both sections can be connected or executed separately.

Prefers is in the dryer section, that is the section that is drying of the refrigerant serves, a drying medium arranged. This drying medium is selected from a group of drying media, which zeolite and the like contains.

In a preferred embodiment is the drying medium in a flexible refrigerant-permeable casing, such as for example, a sack from a refrigerant-resistant nonwoven fabric, arranged. An advantage of this embodiment is that in this way, the auxiliary device as a flexible, elongated Device to be executed can and so in longer Line sections, in particular, but not exclusively, the feed or drainage pipe can be used, the flexibility also a housing in a curved Section of the pipe in question allowed.

In a further preferred embodiment, the filter section has a substantially cylindrical housing, which is particularly preferred Breakthroughs to reduce the flow pressure loss has.

In a further preferred embodiment is the drying medium in the form of a granular or pouring ball, which is arranged with a predetermined density in the dryer section.

at a further preferred embodiment the filter section has a substantially cylindrical or conical filter element on. In this case, the filter element is arranged in the filter section, that substantially all of the refrigerant by the in the Filter section arranged filter must pass through and substantially can not pass the filter. That way, one becomes achieved particularly efficient filtering of the refrigerant.

The The invention is further directed to a dryer device which especially for Devices for exchanging heat can be used. In this case, the drying device according to the invention both in a device according to the invention to exchange heat be used in the manner described above, as well as in conventional Devices for exchanging heat.

Also the drying device according to the invention is the object of the construction cost in the production of a heat exchanger to reduce. With respect to the dryer device, this is achieved achieved that the dryer device in essentially freely selectable Areas of the device for exchanging heat can be arranged and thus the construction costs for a heat exchanger, the drying devices according to the invention equipped, can be reduced.

The has drying device according to the invention a drying medium, which at least partially as elongated body is trained. An elongated body is a body understood the in a direction of expansion a considerably higher extent than in the rest Expansion directions, in particular, an elongated body can also curved or have twisted areas or its cross-sectional profile change in the longitudinal direction.

The In contrast, drying media known in the prior art have a granular structure on.

Prefers become the elongated body produced by a process consisting of a group of processes selected which contains extrusion methods, spraying methods and the like.

This means that the drying medium at least partially in an elongated shape, so for example a rod-shaped or rod-shaped Has shape.

Under a drying medium is not only the drying active Understood medium, which may be, for example, zeolite, but also a carrier material, in which the drying medium is embedded. In a preferred embodiment is the drying medium in the form of a variety of elongated bodies arranged. The elongate bodies of the drying medium are preferred arranged substantially parallel to each other. This means that preferred Within a tube, the drying medium from a variety of elongated bodies exists, the bundle-like are arranged substantially parallel to each other. There are in a particularly preferred embodiment, these elongated body the drying medium at least partially against each other. In this way, a particularly high flexibility of the dryer device, especially in the heat exchange device and in this way the possibility an arrangement of the drying devices at substantially any Make the device for exchanging heat allows or facilitates.

In an embodiment become the drying active substances, such as molecular sieve crystals embedded in a polymer structure. These are preferred an injection-moldable or extrudable polymer structure. The resulting On the one hand, composition offers the advantages of the plastic used or polymers and on the other hand those of the drying active Substances.

The Drying medium is essentially arbitrary by extrusion or injection molding malleable. Furthermore, the drying medium according to the invention is almost Abrasion-free, as the molecular sieve crystals (zeolite) within the Polymer structure are connected. The produced in this way Drying medium is also substantially arbitrarily elastically deformable, this means bendable, and to some extent also stretchable or compressible.

The elongate bodies according to the invention may, in a preferred embodiment, have a mechanical connection between one another and be fixedly arranged relative to one another. However, it is also preferred that the individual elongate bodies be mechanically interlocked with one another without mechanical connection Insert pipe section of the refrigeration circuit or the device for exchanging heat, wherein preferably a position upstream of a filter device is selected. The particular configuration of the drying medium depends on the arrangement within the device for exchanging heat.

In a further preferred embodiment become the elongated body of the drying medium into a bundle connected with each other. Particularly preferred are the elongated body with the filter device mechanically - as in particular, but not exclusively - by Injection connected.

In a further preferred embodiment can the elongated invention body also one behind the other in the pipes housed or loose in Tubes or areas of the tubes are inserted.

It is preferred, the elongated body, for example, in one Bend or constrict the heat exchange device, around by this positioning without any additional mechanical support means undesirable prevent geometric displacements of the dryer media.

In a further preferred embodiment show the elongated body a relationship from their cross-sectional area to their length which is smaller than 0.1 mm, preferably smaller than 10.05 mm and, more preferably, less than 10.02 mm. Because of this Relationship, which indicates a very small cross-sectional area in relation to the length, it is possible to have a Variety of elongated bodies into a tube of the device for exchanging heat, that a big one Part of the cross-sectional area of the respective tube is filled by the elongated body. In a further preferred embodiment, the drying medium at least one component in crystalline form, which is in a Embedded polymer structure. This way - as above mentioned - one particular achieves advantageous structure of the drying medium.

The The invention is further directed to a device according to the invention described above to exchange heat directed, which has a drying device according to the invention.

Further Advantages and embodiments the device according to the invention to exchange heat emerge from the attached Drawings. Show:

1 a device according to the invention for the exchange of heat in a schematic representation;

2a a detailed view of an embodiment of the device according to the invention for the exchange of heat;

2 B a plan view of the device 2a ;

2c another side view of the device 2a ;

3a a detailed view of another embodiment of the device according to the invention for the exchange of heat;

3b a plan view of the device 3a ;

3c another side view of the device 3a ;

4a a detailed view of another embodiment of the device according to the invention for the exchange of heat;

4b a plan view of the embodiment 4a ;

4c another side view of the embodiment 4a ;

5 a drying device according to the invention.

In 1 is a schematic representation of a device according to the invention for the exchange of heat shown. In this case, the reference numeral refers 4 to a supply pipe for the flowable medium, that is the refrigerant. At the feed pipe 4 is a connection device 11 arranged to connect the supply pipe with other pipes. These are preferably in the connection to a screw connection.

The reference number 6a indicates a first collection and / or distribution pipe. This has in its interior a plurality of partitions 3b . 3d . 3f on which the collection and / or distribution pipe 6a subdivide into several subspaces in its longitudinal direction. The reference numerals 7a . 7b and 7c indicate a plurality of flow devices in fluid communication with the manifold and / or manifold 6a stand. This variety of flow devices 7a . 7b and 7c are arranged substantially parallel to each other. In this embodiment, some of the flow-through devices ( 7a . 7b . 7c ) a larger cross section than other ( 7d ) on.

Of the Area large volume Tubes serve to provide sufficient buffer volume so that by change the density of the refrigerant z. B. by a phase change from the gaseous state to the liquid state the amount of refrigerant stored in the condenser can vary, without it to an unintentionally strong pressure variation of refrigerant and strong change associated with it the exit state comes.

reference numeral 6b indicates a further collecting and distributing pipe, which essentially corresponds to the collecting and / or distributing pipe 6a is executed. Also the collection and / or distribution pipe 6b has in its interior a plurality of partitions 3c . 3e on.

At the in 1 In the embodiment shown, the flow tubes and the collecting and / or distributing tubes are arranged substantially in the same plane. In the heat exchange devices known from the prior art, it is known to arrange a collector such that it protrudes from a plane in which the flow tubes and the collecting and / or distributing tubes are arranged. By the embodiment shown here can therefore be saved by the arrangement in a plane space.

The individual flow tubes are substantially perpendicular to the Collection and / or distribution pipes arranged. the distribution pipes essentially vertical and the flow tubes substantially are arranged horizontally. The flow direction of the refrigerant extends in this embodiment from top to bottom.

The refrigerant passes through the feed tube during operation 4 in the collection and / or distribution pipe 6a and can then move in the direction b to the first partition 3b spread. From there, the refrigerant passes through the flow tubes (not shown) 7 in the second collection and / or distribution device 6b and from there to the separator 3c flow. From there, the refrigerant flows back into the first collection and / or distribution pipe 6a and within the collection and / or distribution pipe 6a up to the separator 3d , From there, the refrigerant flows again through flow tubes, not shown 7 in the collection and / or distribution pipe 6b to the partition 3e and now serpentine in the area of large-volume pipes between the two collection and / or distribution pipes 6a and 6b back and forth until it is in the lowest chamber of the manifold 6a arrives. From here, the refrigerant finally reaches the three small-volume flow tubes 7d in the collection and / or distribution pipe 6b from which it finally flows 5 flows out of the device for the exchange of heat. It can be seen that the distance between the individual partitions 3b . 3c . 3d etc. decreases in both collecting and / or distribution pipes from top to bottom. In this way, the increasing density of the refrigerant within the condenser from top to bottom is taken into account.

The drainpipe has a section in this embodiment 5a , a section 5c , as well as a section 5b , with in each case widening or broadened cross section. In the section 5b is an additional device 20 accommodated. This attachment has a filter section 24 and a dryer section 22 on, wherein the outer diameter of the attachment is greater by a defined amount than the inner diameter of the pipe section 5b , Next to it is in the drainpipe 5 a detachable section 15 intended. This section preferably has a screw thread. The section serves to sections 5b and 5c of the drainpipe 5 to separate from each other, wherein after separating the collector and / or dryer device from the drain pipe 5 can be removed. In this embodiment, that portion of the drainpipe is 5 , in which the collecting and / or drying device is arranged, substantially parallel to the collecting and / or distribution pipes 6a and 6b arranged. Any other layers and shapes of the drainpipe 5 but as far as the next component of the entire devices are also possible. Instead of the embodiment shown here, which has a widening cross-section 5a also the entire drainage pipe could be made with a wider cross-section.

The reference number 8th indicates a frame device, which for stabilizing the collecting and / or distribution pipes and the flow tubes 7 is provided.

The filter and / or dryer device preferably has an elongate shape with a preferably flexible filter and / or dryer insert. This insert serves to the collector and / or drier as simple as possible, ie even in confined conditions in the drainpipe 5 to be able to insert. The flexibility of the insert also allows the use of sections of the drain pipe, the z. B. has bends. In this way, any sections of the so-called liquid line between the condenser and the expansion valve of the refrigeration cycle can be used for receiving the filter and / or drying device. The detachable section or the connection fitting is also preferred in the drainage pipe 5 pushed in, that is the drainpipe 5 preferably has an internal thread into which an Au (not shown) ßengewinde the detachable section 15 engages, wherein both the downstream area and the area upstream of the detachable portion are components of the drainage pipe.

additional Feature of the filtering and / or drying device in a preferred embodiment is the use of a sealing ring, which serves that in the Mounting the drainpipe the rooms upstream and downstream regarding the Additional device to be separated from each other. This way will ensures that substantially all the refrigerant pass through the filter device got to. Next to it guaranteed the sealing ring also provides a secure seal against the environment.

2a shows a detailed view of a device according to the invention for the exchange of heat. In this case, the reference numeral refers 7 on a flow tube for the cooling medium. The reference number 12 refers preferably between the individual flow tubes 7 arranged corrugated fins, which serve the improved heat exchange with the surrounding air. reference numeral 6b denotes a collection and / or distribution pipe.

In this embodiment, the collector and / or filter device is not provided in the drain pipe, but in a specially designed for receiving this device flow tube. For this purpose, the flow tube 7d a section with a smaller cross-section 27a and a section of enlarged cross-section 27b on. In this flow tube is a collection and / or filter device 20 inserted, which has a smaller outer diameter than the inner diameter of the pipe section 27b , Preferably, the smaller section section does not progressively enter the larger section section 27b over, but the extension takes place via an intermediate section 27c ,

In this embodiment, the flow tube 7d , in which the dryer and / or filter device is arranged, through the collecting and / or distribution pipe 6b pushed. For this purpose, the collection and / or distribution pipe 3a angled areas 26 or collars on to a larger attachment area with the flow tube 7d to reach. In this embodiment, in this embodiment, the collars have a relationship with respect to the device for the exchange of heat to the outside, that is, away from the corrugated fins and in the direction of the drainage pipe 5 , The collars 26 However, they can each also with respect to the collection and / or distribution pipe 6b facing inwards or outwards, or all in the direction of the corrugated ribs 12 ,

At its left end points the flow tube 7d a screw thread 36 on which the screw connection with the spout 5 serves. This screw is used on the one hand to connect the drainage pipe and on the other hand as a service opening for insertion and removal of the additional device. The screw thread can also force, form and / or -stoffschlüssig with the collection and / or distribution pipe 6b be connected.

In a further preferred embodiment, the manifold 6b also be carried out shortened (not shown), so that on the passage of the flow tube 7d through the collection and / or distribution pipe 6b can be waived. In this case, however, as stated above, a holding device (not shown) would preferably be provided to hold the pipe end in position with the connection fitting. The reference number 31 refers to a sealing ring, which, as stated above, a tight connection between the drain pipe and the flow tube 7b causes. The reference number 15 refers to a union nut, in this case with a screw thread, around the drainpipe 5 against the flow device 7b to screw. The reference number 34 refers to an eyelet that pulls out the attachment 20 after opening the connection device 15 serves.

2 B shows a top view of the device for the exchange of heat 7a , In this case, the reference numeral refers 7 on a flow tube and the reference numeral 12 on a variety of corrugated ribs. reference numeral 15 refers, as above, to the connection means for connecting the flow device 7d with a connecting pipe. The reference number 39 refers to one on the drainpipe 5 arranged collar of the drain pipe against which the union nut 15 supports the drainpipe 5 and the flow tube 7d over the sealing ring 31 (see. 2a ) close together. The reference number 34 refers to the eyelet, which serves to remove the collector and / or filter device.

In 2c is another view of the device according to the invention for the exchange of heat 2a shown, in which case the view was rotated by 90 °. Here are mainly designed as a collar holding sections 41 and 42 recognizable, in which the flow tube 7b in the range of smaller diameter 27a intervenes. These holding sections have a contact area 41a and 42a as well as a strongly curved area 41b respectively. 42b on. These areas serve to connect to the area 27a to press the flow tube and thus to effect a stable hold and to form a common solderable surface. The dashed circles indicate the position of the collection and / or distribution pipe 6b at. Instead of Curvature in the direction of the flow tube 7d , which causes the ends of the holding portion facing towards the drainage pipe, the sections could 41b also be curved so that the ends of the holding sections 41 and 42 in one of the direction of the drainpipe 5 pointing opposite direction.

In 3a a further embodiment of the device according to the invention for the exchange of heat is shown in a detailed view. In contrast to 2a , became the drainpipe 5 however, it is omitted in the case of this embodiment as shown in FIG 2a In the embodiment shown, the drainpipe is correspondingly arranged on the device for exchanging heat.

A major difference between the in 3a shown device and in 2a shown device is that the flow tube 7d in the portion in which the attachment is arranged, does not have a widening or tapering cross-section. Therefore, there is no transition area 27c provided with changing cross-section.

The collector and / or dryer device has an annular sealing surface 51 on, which during assembly with the help of the sealing ring 31 against the area 33 of the flow tube 7d is pressed. The latter has an area for this purpose 33a with reduced inside diameter. Furthermore, the collector and / or dryer device 20 a first section 29 in which a filter device 24 is arranged. Here is the section 29 preferably designed rigid and the filter device 24 essentially in the section 29 arranged. By this arrangement, the refrigerant is caused to flow substantially completely through the filter device 24 flows and does not pass this. Furthermore, the collector and / or dryer device has a further section 22 in which a drying agent 25 is arranged or housed. The section indicates 22 also prefers a substantially cylindrical cross section and a curvature 22a in the direction of the filter device 24 , At least part of the section is preferred 22 made of a flexible and refrigerant-permeable material. In a preferred embodiment, the dryer section 22 in the form of a flexible long and thin tubular Trockiernäckchens formed on the filter section 29 is injected. In this case, preferably, the filter section 29 opposite the dryer section 22 a shorter length.

The dryer section is preferred 22 composed of a refrigerant-resistant nonwoven material, which is mixed with a conventional granular adsorbent 25 is filled. In this case, the nonwoven material may have a certain elasticity to a certain flexibility of the section 22 to ensure, since in this case the granules are relatively easy to move against each other. Nevertheless, in order to accommodate a sufficient amount of drying agent in the filter and / or drying device, preferably the dryer bag or the section 22 over substantially the entire tube length of the flow tube 7d extend, whereby preferably a sufficient water absorption capacity is achieved.

Preferably, the filter section 29 to a molded filter device, which preferably comprises a cylindrical housing made of a sprayable plastic, a conically injected filter screen, and the sealing collar 51 and the above-mentioned eyelet or the loop-shaped bracket 34 Making a slight withdrawal of the entire insert from the flow tube 7d allows. As stated above, the preferred cylindrical filter device 29 at one end with the filter device or the filter bag 22 connected, preferably molded. In order to increase the inlet cross-section to the filter screen, the cylindrical housing of the filter screen on the cylinder jacket can have openings so that the refrigerant can also flow radially to the conical filter screen. This feature is particularly useful when there is a sufficient annular gap between the attachment and the pipe section containing it, as in the already described 2a is shown in more detail.

The sealing collar 51 and the sealing device 31 , which is preferably a ring or the like, are designed such that the seal 31 simultaneously seals three spaces against each other, on the one hand the space of the refrigerant downstream with respect to the filter screen relative to the refrigerant upstream with respect to the filter screen and on the other hand, the interior of the flow device 7d or the drainage pipe 5 opposite the environment.

3b shows a top view of the view 3a , In this case, the reference numeral refers 33 on the outer area of the flow-through device 7d , the reference number 31 indicates the sealing device and the reference numeral 38 a portion of the sealing collar of the attachment and the reference numeral 34 the eyelet or the bracket, for removing the filter and / or dry device from the flow tube 7d serves.

3c shows another view of the in 3a shown device for the exchange of Warmth. This results from 3c combined with 3a that section 29 in which the filter device 24 is housed, having a substantially cylindrical cross-section. Instead of this cross section, however, elliptical, polygenic, rectangular and the like formed cross sections could be selected and mixed forms of these cross sections. Similar to the case of 2c is also a holding device here 41 provided, which for engagement or attachment of the flow tube 7b serves. Furthermore, it is off 3c It can be seen that the dryer area is not completely tightly filled with the dryer granules, but relatively loose, so that, as stated above, the granules are relatively easily against each other.

4a shows a further embodiment of the device according to the invention for the exchange of heat. It is also provided in the case of this embodiment, that the flow device 7d through the collection and / or distribution pipe 6b is pushed through. The filter and / or dryer device 20 is performed substantially similar to the above embodiments. Again, there is a filter section 29 provided, the one substantially conically tapered from left to right filter insert 24 having.

As it turned out 4b results, is also in the case of this embodiment, a sealing ring 31 as well as an eyelet 34 provided for removing the filter cartridge.

The essential difference from the previous embodiment is the design of the collection and / or distribution pipe 6b While in the above embodiments, the collecting and / or distributing tube is formed integrally, it is in the case of in 4c embodiment shown in two parts, so preferably has a bottom and a lid. There are fasteners 61 and 62 provided with appropriate sections 64 and 65 mesh. Here are the sections 61 and 62 , curved sections 61a and 62a on, as well as sections 61b and 62b which is substantially parallel to the flow device 7b run. Furthermore, there are curved sections 64a and 65a provided and sections 64b and 65b substantially parallel to the direction of the flow device 7d run. The holding sections 61 and 64 on the one hand, and 62 and 65 on the other hand, cause the two parts of the collecting and distributing device to intermesh.

In this embodiment, the device for exchanging heat is preferably flowed through from bottom to top, ie the remaining flow tubes are in 4a below the pipe 7d arranged.

Preferably, the cross section or diameter of the flow tube is smaller than that of the collecting and / or distribution pipe 6b what's up 4a by comparison results.

It would be however other solutions possible. So could the collection and / or Distributor a curved Have area and the flow tube in this curvature or Bend led become. A stable stop could in this by a positive, positive and / or cohesive connec tion between the manifold and / or manifold on the one hand and the flow tube On the other hand be achieved.

As shown above, the respective sections of the tubes, in where the attachment is arranged, a substantially circular cross-section on. Besides that would be but also other cross sections, such as rectangular Cross sections, conceivable. In addition, you can next to the shown connections between manifold and flow tube, in which the additional device is arranged, further embodiments be made, such as with regard to the screw the opening, to enable exchange of the accessory device of access.

Furthermore, in addition to the in 2 and 3 illustrated embodiment in which the manifolds are integrally formed, these also be constructed in two parts with tube sheet or lid (see. 4 ). In this case, preferably both parts, that is, both the tube sheet and the lid, have openings for receiving the filter dryer tube. Preferably, the collector tube can be a larger. Cross-section than the flow tube, which receives the auxiliary device.

Vice versa would it be also possible, to pass the collector tube through the flow tube, wherein in this case the flow tube has a larger cross-section would as the collector or distributor pipe. Also, in this case would have the filter section preferably be adjusted accordingly or at another position be provided.

In other preferred embodiments, the attachment may be located anywhere on the fluid line, such as directly in front of an expansion valve. Furthermore, a section in which the filter and / or dryer device is arranged, could also have a considerably larger diameter or cross section and be designed for shorter, for example. In this way, as a result, the same amount of dryer granules could be accommodated and with a longer and less thick additional device. Preferably, however, in the case of larger diameter of the flow tube, which accommodates the filter and / or dry device, a larger diameter of the fittings must be used, resulting in larger required sealing surfaces.

In a further preferred embodiment the flow tube receiving the attachment can Being straight, being in extension of this flow tube preferably enough space to change the attachment is provided so that waives the flexibility of the additional device can be and in this way a substantially rigid accessory can be used.

5 shows a drying device according to the invention. This has a variety of bars 25 which contain the drying active material. In the process, molecular sieve crystals were incorporated into the in 5 embedded polymer structure embedded. In this embodiment are within a refrigerant pipe or a pipe 5 the variety of rods arranged. In this embodiment, the cross sections of the bars have a substantially circular shape. In addition, however, other forms may be provided, such as elliptical, polygonal and the like.

The use of these elongate bodies can eliminate the need for a prior art bag for receiving desiccant in granular form. Furthermore, at the 5 shown embodiment of a holding device, which prevents a relative movement of the drying device - for example, compared to the filter device - ver dispensed. Furthermore, the embodiment shown here effects a large contact surface between the desiccant and the fluid to be dried, that is to say the refrigerant. In this way, a particularly advantageous kinetics of the drying process is achieved.

Prefers the manufacturing process is designed so that the drying-active Material preferably in the outer areas of the individual bars is arranged.

As mentioned above, the individual bars 25 be fixed against each other or arranged to be movable against each other. In the latter case, the mobility of the entire bundle of rods 25 elevated. The single bars 25 can also be inserted into tubes which have other than a circular cross-section.

Furthermore, also several rods 25 the drying medium can be arranged one behind the other. As noted above, the individual bars are 25 particularly preferably extrudable. Due to the high elasticity of the individual rods, it is possible to accommodate them at substantially arbitrary locations of the device for exchanging heat.

By the embedding of molecular sieve crystals in the polymer structure it is achieved that the drying medium is virtually free of abrasion.

Preferably, the individual rods 25 also be in mechanically fixed connection with the filter device. In this case, the drying rods 25 or the drying medium is preferably arranged upstream of a separate filter (not shown) in each case.

Further the drying device can be firmly connected to the filter device stand or loose this be arranged.

Also can the filtering devices and the drying devices are located locally from each other be spaced.

Claims (41)

Contraption ( 1 ) for the exchange of heat, in particular for a motor vehicle, with at least one feed tube ( 4 ) for a flowable medium, at least one collecting and / or distribution pipe ( 6a . 6b ), a plurality of flow tubes ( 7 ) and at least one drainage pipe ( 5 ) for the flowable medium, characterized in that in at least one section of at least one of these tubes at least one additional device ( 20 ) is arranged to influence at least one physical property of the flowable medium. Apparatus according to claim 1, characterized in that the additional device ( 20 ) has at least one drying device. Device according to at least one of the preceding claims, characterized in that the additional device ( 20 ) has at least one filter device. Device according to at least one of the preceding Claims, characterized in that the flowable medium is a refrigerant is. Device according to at least one of the preceding claims, characterized in that the section of the tube in which the auxiliary device ( 20 ) is arranged, compared to the adjacent sections an enlarged cross section ( 27b ) having. Device according to at least one of the preceding claims, characterized in that the additional device in the drainage pipe ( 5 ) is arranged. Device according to at least one of the preceding claims, characterized in that the additional device in a flow tube ( 7 ) is arranged. Device according to at least one of the preceding claims, characterized in that the additional device in a flow tube ( 7 ), which is substantially at the end of the collecting tube ( 6b ) is arranged. Device according to at least one of the preceding Claims, characterized in that at least one tube, preferably the Tube in which the attachment is arranged, a detachable section, preferably with a screw thread. Device according to at least one of the preceding claims, characterized in that the detachable portion is arranged on the pipe in such a way. that after solving the section ( 15 ) the additional device ( 20 ) can be removed from the section of the pipe or inserted into the section of the pipe. Device according to at least one of the preceding claims, characterized in that at least two of the flow tubes ( 7a . 7d ) Have sections with mutually different cross sections. Device according to at least one of the preceding claims, characterized in that the flow tube in which the auxiliary device ( 20 ) is arranged, at least one portion which through the collecting tube ( 6b ) is passed. Device according to at least one of the preceding claims, characterized in that the flow tube in which the auxiliary device ( 20 ), has at least one curved portion. Device according to at least one of the preceding Claims, characterized in that the flow tube, in which the auxiliary device is arranged, having at least one releasable portion. Device according to at least one of the preceding Claims, characterized in that the detachable portion of the flow tube in the additional device is arranged, at least one connection which is selected from a group of compounds, which contains clamp connections, screw connections and the like. Device according to at least one of the preceding Claims, characterized in that the flow tube in which the auxiliary device is arranged, opens into a screw connection. Device according to at least one of the preceding Claims, characterized in that at least one tube has a cross section which is selected from a group of cross sections, which is essentially circular, elliptical, contains rectangular, polygonal cross-sections and hybrids thereof. Device according to at least one of the preceding Claims, characterized in that the additional device at least one has flexible section. Device according to at least one of the preceding Claims, characterized in that the dryer and / or filter device a dryer and a rigid filter section has. Device according to at least one of the preceding Claims, characterized in that the outer diameter of the attachment smaller than the inner diameter of the corresponding pipe section. Device according to at least one of the preceding Claims, characterized in that the filter and / or the dryer section of Additional equipment proppant to have this substantially centrally in the pipe section to store Device according to at least one of the preceding Claims, characterized in that the pipe section containing the additional device proppant for substantially centric storage of the attachment. Device according to at least one of the preceding Claims, characterized in that the dryer section is longer as the filter section. Device according to at least one of the preceding Claims, characterized in that the filter section at least one having rigid section. Device according to at least one of the preceding claims, characterized gekennzeich net, that in the dryer section a drying medium ( 25 ) is arranged. Device according to at least one of the preceding Claims, characterized in that the drying medium is selected from a group of Drying media selected which contains zeolite and the like. Device according to at least one of the preceding Claims, characterized in that the drying medium arranged in a bag is. Device according to at least one of the preceding Claims, characterized in that the filter section is substantially one cylindrical housing having. Device according to at least one of the preceding Claims, characterized in that the cylindrical filter housing has openings. Device according to at least one of the preceding Claims, characterized in that the drying medium in the form of a Granules are provided, which with a predetermined density is arranged in the dryer section. Device according to at least one of the preceding Claims, characterized in that the filter section is substantially one cylindrical or conical Has filter element. Device according to at least one of the preceding Claims, characterized in that the additional device with sealing means is equipped, the same time several, preferably three rooms against each other seals. Air conditioning, in particular for a motor vehicle, characterized in that the air conditioning system comprises at least one device according to at least one of the preceding claims. Drying device, in particular for a device to exchange heat, which has a drying medium, which at least in sections as an elongated body is trained. Drying device according to claim 34, characterized that the drying medium in the form of a variety of elongated Arranged bodies is. Drying medium according to at least one of the preceding Claims, characterized in that the elongate body substantially are arranged parallel to each other. Drying device according to at least one of the preceding Claims, characterized in that the elongate bodies at least partially against each other are displaced. Drying device according to at least one of the preceding Claims, characterized in that the drying device at least is flexible in sections. Drying device according to at least one of the preceding Claims, characterized in that the elongated body a relationship from their cross-sectional area to their length, which is less than 0.1 mm, preferably less than 0.05 mm and especially preferably less than 0.02 mm. Drying device according to at least one of the preceding Claims, characterized in that the drying medium at least one Component in crystalline form, which is in a polymer structure is embedded. Device according to at least one of claims 1-32, with A drying device according to at least one of claims 34-40.