EP2932181A1

EP2932181A1 - Plate unit, gas-to-gas matter exchanger, and building ventilation system

Info

Publication number: EP2932181A1
Application number: EP13815373.9A
Authority: EP
Inventors: Johann Kempfle; Daniel Kreutzer
Original assignee: Al Ko Therm GmbH
Current assignee: Al Ko Therm GmbH
Priority date: 2012-12-17
Filing date: 2013-12-05
Publication date: 2015-10-21
Anticipated expiration: 2033-12-05
Also published as: DE102012024549B4; EP2932181B1; WO2014094986A1; DE102012024549A1; CN104870928A

Abstract

The invention relates to a plate unit (10) for a gas-to-gas matter exchanger, at least comprising at least one plate (11) having at least one channel structure (12), which forms at least one channel (13) for a fluid, wherein the at least one plate (11) is made of a plastic, and at least one selectively matter-permeable membrane (16), which is stretched out on the at least one plate (11). The invention further relates to a gas-to-gas matter exchanger, at least comprising a matter exchanger package (20) comprising a plurality of matter exchanger plate units, which are arranged in parallel and through the channels (13) of which a first fluid and a second fluid flow in alternation, wherein the matter exchanger plate units are designed as plate units (10) according to the invention, and a building ventilation system designed as a gas-to-gas matter exchanger according to the invention.

Description

description

Panel unit, gas-gas material exchanger and building ventilation system

The invention relates to a plate unit of a gas-gas material exchanger and a gas-gas material exchanger for the mass transfer between air flows in buildings, at least aufwei send a pulp stack of a plurality of parallel fabric exchanger plate units, through which Kanä le alternately a first fluid and a second fluid flows.

Furthermore, the invention relates to a building ventilation system for the mass transfer between air flows in buildings, the building ventilation system is arranged in an air flow of the building.

Heat and material exchangers, in particular for streams of gaseous media, are known from the prior art. Hierbe two different tempered and / or humid streams are passed past each other, so that a temperature and / or mass transfer can take place between these streams. However, in the case of conventional substance exchangers, effective temperature and / or substance exchange takes place only with large gradients between the flows. For streams with low gradients, as they occur, for example, in the air exchange of the outside and inside air for air conditioning buildings, the conventional material exchangers work ineffective.

From document DE 10 2012 008 197 an exchange system is known for the exchange of substances between two fluids, with a first fluid flowing through a space which can be flowed through and a second fluid flowing through a channel labyrinth, the channel labyrinth emerging from a permeable membrane and a membrane counterpart is formed. The flowable channel labyrinth has a shape that allows the slowest possible and non-turbulent flow of the fluid.

CONFIRMATION COPY Further, DE 19 64 635 A describes a material exchanger for exchange between at least two liquid streams, in which the liquids flow through a plurality of separate spaces. According to this document, the separation of the liquid streams or the spaces takes place inter alia by means of a membrane.

It is therefore an object of the invention to provide a gas-gas material exchanger and a plate unit for a gas-gas material exchanger, by means of which an effective exchange or an effective matching of the parameters of the currents is ensured even at low temperature gradients between the streams. It is a further object of the invention to provide a building ventilation system therefor.

This object is solved by the features of the independent claims. Advantageous developments of the invention are the subject of the subordinate claims.

The inventors have recognized that a gas-gas-material exchanger with a novel shaped plate unit ensures a more effective temperature and / or moisture balance even at low temperature gradients. For this purpose, the plate units each comprise a made of a plastic, folded plate with a channel structure, which forms a plurality of parallel channels. On the folded plate a selectively permeable membrane is stretched. The membrane itself is flat, that is not folded, and is supported by the channel structure of the plate. For the purposes of the present invention, the term "selectively permeable to substance" means a membrane which is permeable to certain substances and impermeable to other substances.

The channels are shaped so that a fluid flowing through, for example a gas, at its boundary layers a experiences slight turbulence, so that almost no standing boundary layers are formed on the membrane. In the channels therefore turbulence prevail with cross flows. This ensures a better contact between the gas and the membrane and thus a more effective exchange. The turbulences in the flow are achieved, for example, by a corresponding channel course and / or a corresponding channel shape. For example, the channel course is zigzag.

Due to the folding of the plate and an angled channel course, the plate is stiffened in different directions. As a result, the inherent rigidity of the plastic plates in comparison to the conventionally used rectilinear folds (usually aluminum plates) is increased. In addition, the folds form bearing surfaces or a support structure for adjacent, stacked disk units in one

Substance exchanger. The self-weight pressure on the disk units is distributed evenly. In addition, the channels of adjacent, adjacent plate units can be arranged partially offset from one another, so that in this way a larger support or support surface is formed. This can be achieved for example by a trapezoidal cross-section of the channels, which allows both large support surfaces and large open membrane surfaces.

Furthermore, superimposed disk units can each be arranged folded against each other, for example, rotated by 90 ° or 180 °. As a result, both cross and counter currents can be realized. Each of the plate units alternately changing the channel guide stacked to form a mass transfer stack is provided with a first fluid (in each first plate) and a second fluid (in each second plate) whose main flow directions are oriented in a cocurrent and / or countercurrent manner according to the arrangement of the plate units. The fluids are separated from each other only by a membrane. Accordingly, the inventors propose a plate unit of a gas-gas substance exchanger for the mass transfer between air streams in buildings, comprising at least one plate with at least one channel structure which forms at least one channel for a fluid, wherein the at least one plate is made of a plastic, and at least one selectively permeable membrane spanned on the at least one plate. The disk unit comprises exactly beneficial ^¬ way legally a plate. In one embodiment, the plate is angular, for example quadrangular, in particular rectangular or square, or polygonal, for example hexagonal. Other forms of the plate are possible in other embodiments. The plate is made in one piece or in several parts. Furthermore, the plate is inventively - made of a plastic. In addition to a weight saving, such a material offers the advantage that the plates can be produced and processed by simple known methods, such as thermoforming, in particular thermoforming, blow molding and / or injection molding. In addition, plastic is corrosion-resistant to most aggressive media, so that expensive coatings can be dispensed with.

In the plate, at least one channel structure is formed, which has a plurality of channels for a first fluid, for

Example a gas trains. Advantageously, exactly one channel structure is formed per plate. The channels of the channel ^¬ structure are preferably parallel to each other. Advantageously, the channels are formed as depressions in an upper side of the plate. Accordingly, the channels have a deeper trough and a higher ground Pla ^¬ teau. Advantageously, the plateaus of the plate and the bottoms of the plate each form a deeper or a higher level. Between the channels are sorted ^¬ arranged weils intermediate channels, which are a mirror image to the channels, but offset by a channel width is formed on a lower surface of the plate. The channels are thus open to the top of the plate and the intermediate channels to Bottom of the plate. In the following, what is said for the channels also applies analogously to the intermediate channels. Differences are explicitly noted.

In one embodiment, the channels have a trapezoidal cross-section. Advantageously, on the one hand, the largest possible surface, which is closed by the membrane but open to adjacent plate units, is provided for mass transfer, and, on the other hand, the largest possible support or support surface is ensured for further plate units. A detailed description of a substance exchanger or a substance exchanger package is provided. This is followed by a plurality of stacked plate units and superimposed channels and intermediate channels.

So that the support structure covers as little as possible membrane area and reduces the mass transfer, the inventors keep the bearing surfaces as small as possible, yet large enough to keep the surface pressure due to pressure and weight forces within limits.

For this purpose, the inventors propose a trapezoidal channel cross section, which combines both advantages, in particular with respect to the triangular cross sections known on the market. Triangular canals with pointed "plateaus" and equally pointed bottoms offer only small and relatively sharp-edged bearing surfaces which can injure or squeeze the sensitive membrane under a greater pressure load.Thus, the exchanger leaks and poses a hygiene problem Pads on individual dots the size of a needle tip.

Another advantage of the trapezoidal structure is the construction of a counterflow. Here, the channels of all plates run parallel to each other over long distances. So that the bottoms of an upper plate can rest on the plateaus of a lower plate, it is advantageous if they provide a flat bearing surface. In the known triangular gene channel structures with pointed edges these would slip off each other and the upper plate sink into the lower.

This risk of slipping can be additionally prevented by the slightly zigzag-shaped channel course. The upper and lower channels of two plates cross each other and make a sinking impossible. In the case of triangular channel cross-sections, punctiform bearing surfaces would arise here, however, and the sensitive membrane runs the risk of being squeezed off, as a result of which the exchanger loses its tightness. In the trapezoidal shape chosen according to the invention, the support surfaces are larger and eliminates the danger of crushing.

Preferably, the at least one plate is stiffened in at least one direction. Preferably, the plate is stiffened in two, more preferably three directions. This stiffening can be achieved either by the channel structure or by a corresponding channel profile or channel shape. In a preferred embodiment, the at least one channel structure is formed as a fold. By folding, a plurality of channels can be easily introduced into the plate, wherein the fold at the same time causes a stiffening of the plate in a direction along a main flow direction of the channels. The convolution is formed, for example, angular, accordion, sawtooth, trapezoidal and / or wavy. Due to the simple workability of Kunstoffoffplatten the channel structure, in particular the folding, can be easily stamped into the plastic plates. Another embodiment provides a channel structure as a pleated structure.

In the plates, the gas flows along the main flow direction through the channels. In order to allow a most effective mass transfer between the gas streams in adjacent plates, turbulence generators are incorporated in the flow. As a result, boundary layers of the gas are whirled up on the membrane, in particular on the open membrane surfaces, so that improved contact of the gas with the membrane is achieved. ran arises. Standing interfaces are thus advantageously avoided. Accordingly, the at least one channel has a turbulence-generating (n), briefly turbulence-generating, channel shape and / or channel profile. In one embodiment, either a turbulence generating channel shape or a turbulence generating channel profile is provided. Another embodiment provides both a turbulence generating channel shape and a turbulence generating channel profile. For example, a turbulence generating channel shape is formed as an asymmetric and / or nonuniform cross section. By way of example, an uneven channel course, that is to say a channel course with at least one change in direction of the main flow direction, is regarded as a turbulence-producing channel course. The at least one channel thus preferably has at least one turbulence-generating means. For example, only one turbulence generating means, short turbulence generator, per channel is provided. Advantageously, several turbulence generators per channel are provided.

The turbulence generators are advantageously arranged uniformly distributed in the channels, in order to achieve the widest possible coverage of the material and heat transfer. As turbulence generators, for example, the following designs are used: nubs, edges, hills, dimples, spirals, waves, grooves, odd channel shape, in particular zigzag-shaped channel shape and / or sinusoidal channel profile, and the like. In particular, the boundary layer of the gas can also be whirled up by a rough or uneven surface of the channel. In an embodiment with a zigzag-shaped channel profile as a turbulence generator, a deviation of the orientation of the channel from the main flow direction is preferably not more than 20 °, more preferably not more than 10 ° and most preferably approximately 5 °. A zig-zag-shaped channel course also causes a stiffening of the plastic plates transverse to the main flow direction. As a particularly preferred embodiment, a rectangular plate is considered with a folded channel structure whose channels have a zigzag-shaped channel profile. The plate is stiffened here mainly by the folding of the channel structure and by the zigzag-shaped channel course.

Another preferred embodiment is a hexagonal plate with a folded channel structure, wherein the channels have a zig-zag-shaped channel profile at least in a central region.

On the plate according to the invention a membrane is clamped. Preferably, the membrane is clamped on the top of the plate. The membrane is flat and is supported by the channel structure, in particular the plateaus of the channels, that is to say the bearing surfaces. The membrane is thus at least at one point on the channel structure. Preferably, the fold is formed such that the membrane rests in many places, so as many support or support points are formed. As a result, an elastic, thin and sensitive membrane can be sufficiently supported to withstand the internal pressure of the gas flowing through the channels.

For attachment of the membrane to the plate this is connected in one embodiment at least in an outer region of the plate with the plate. In this case, the membrane is preferably connected to the plate with at least one outer, channel structure or channel-free region, wherein in each case inflow and outflow openings of the channels advantageously remain free. Preferably, channel-free regions are formed on at least two opposite sides of the plate along the channels. As illustrated, these regions can be designed as flat surfaces, for example for bonding, or else have a special profiling, in which the membrane can be clamped or mechanically fastened (not shown). In another embodiment, the membrane is at least one location with the at least one connected to a channel structure. Here, the membrane is orzug connected to the plateaus of the channels of the channel structure, so that the membrane is just clamped on the plate Here, the membrane is preferably connected by welding, pressing stamping, clamping and / or gluing with the plate. Furthermore, the membrane can be clamped, for example under pretension on the plate and connected to this.

The membrane according to the invention is a selectively permeable membrane which is permeable to various substances, for example water vapor, and impermeable to other substances, for example air. As a material for the membrane, for example, a Sympatex material or other selectively permeable materials are. Depending on the respective field of application of the substance exchanger, for example for dehumidifying the exhaust air of a building or for exhaust air purification, the membrane or its selective permeability can be selected. In one embodiment, the at least one membrane is designed accordingly as a dense membrane. A dense membrane is preferably impermeable to air and permeable to water vapor or only water vapor permeable. In another embodiment, the at least one membrane is formed as a porous membrane. A porous membrane is, for example, water and / or water vapor permeable or permeable to certain particles or substances in the gas.

The scope of the invention also includes a gas-gas material exchanger for the mass transfer between air flows in buildings, at least comprising a material exchanger of a plurality of parallel arranged fabric exchanger plate units with alternating alternating inlet and outlet openings, through whose channels in each case a first fluid and a second fluid flow side by side, wherein the fabric exchanger plate units are formed as described above, according to the invention Plattenein ^¬ units. Such a material exchanger with the novel molded plate unit to ensure a more effective temperature and / or humidity compensation even when ge ^¬ rings temperature gradient so that a significant effi- ciency increase in contrast to conventional material exchangers is possible. Consequently, the material exchanger according to the invention is particularly suitable for mass transfer between streams with small differences in temperature, for example air dehumidification and air humidification in buildings.

The material exchanger advantageously has a substance exchanger package which is formed from a multiplicity of plate units according to the invention arranged in parallel and stacked one above the other. Through the channels of the plate units, separated by the membranes, alternately flows a first fluid and a second fluid, wherein between the fluids through the membranes in each case the mass transfer takes place. The fluids are preferably gases, in particular air with different parameters, such as temperature, humidity, pressure, constituents and their partial pressures and / or impurities.

A plate unit consists of a flat spread membrane and an underlying support structure for the membrane. The membrane fulfills the task of mass transfer. The support structure provides stability to the membrane, keeping it stretched and at a constant distance to an adjacent membrane or plate unit. For this purpose, it is also extensive pronounced with a variety of support elements, preferably in the form of channels, which at the same time provide better flow and material transfer.

The stacked disk units are each supported by the underlying disk units. The uniformly distributed support elements (channel back) ensure the most uniform possible pressure distribution of both the dead weight of the plate units and the flow pressure of the gases. Accordingly, a respective support structure, in particular a support surface, is advantageously formed by the channel structures of the plate units for adjacent plate units lying thereon. Preferably, the disk units are supported only by the channel structures of other disk units without additional support elements. In one embodiment, a clip system and / or a frame made of metal or plastic is provided, which secures the stacked plate units against slipping. As bonding and sealing agents, in addition to clipping and gluing, known methods are used, such as welding, gluing, squeezing, clinching or casting with synthetic resin.

The material exchanger can be used to realize both crossflows and countercurrents. Depending on the arrangement of the disk units, in one embodiment at least partially

Cross-flow formed. In another embodiment, at least partially a countercurrent is formed. For this purpose, adjacent plate units are advantageously arranged in an interlocking manner. In this case, entangled means that the main flow directions in adjacent, stacked plate units run differently, in particular not parallel to one another. Preferably, adjacent plate units are each rotated by 90 ° or 180 °. Rectangular plate units are preferably arranged rotated by 90 °, so that a cross-flow is realized. A detailed description of the respective main flow direction in the crosstalk or counterflow in different embodiments of the disk units follows in the description of the figures. It goes without saying that in the context of the invention the plate units are each rotated by a multiple of the specified angle numbers in order to achieve the stated effect.

In the mass exchanger package, the membrane of a first disk unit forms an active closure of the channels of this first disk unit. The membrane of a second disk unit disposed thereunder provides a passive closure of the downwardly open intermediate channels between the channels of this first disk unit. An active closing of the channels thus takes place in each case by the membrane spanned on the plate, while a passive closing takes place in each case by the resting of the plate unit on the membrane of another plate unit. Between two membranes flows through the channels and intermediate channels in each case a gas. When cross-flow exchanger as well as in the inlet and outlet zone of the countercurrent, the channels of adjacent plates intersect. The crossing points of the bottom of the valley with the channel backs (plateaus) form the support points or supporting surfaces.

By contrast, in the middle zone of the countercurrent, the channels run parallel to each other or, in the zig-zag design, almost parallel to one another.

In order to allow the largest possible and effective mass transfer between the gases through the membranes in this area, adjacent plate units or their channels and intermediate channels are preferably arranged offset. In this way, the best possible support adjacent disk units can be ensured by sufficiently large support surfaces. A region of the membrane which adjoins both a channel and an intermediate channel, that is to say between a channel of a plate unit and an intermediate channel of another plate unit, is referred to below as an open membrane surface. In one embodiment, an offset of the channels of superposed plate units is provided such that the bottom of a channel is at least partially disposed on the plateau of an underlying channel. Another embodiment of the offset provides that stacked plate units are arranged offset by a channel width to each other. Advantageously, a width of the support surface transverse to the main flow direction is greater than or equal to 1 mm. Further advantageously, the open membrane area is greater than or equal to the support surfaces.

Furthermore, the invention relates to a building ventilation system for the mass transfer between air flows in buildings, the building ventilation system is arranged in an air flow of the building and is designed as described above, inventive gas-gas material exchanger. In a preferred embodiment, the building ventilation system is designed as air conditioning. In the following the invention with reference to the preferred embodiments with reference to the figures will be described in more detail, with only the features necessary for understanding the invention features are shown.

They show in detail:

1 shows a schematic plan view of a plate in a first embodiment,

2 shows a schematic, fragmentary perspective view of the plate according to FIG. 1,

3 shows a schematic perspective view of a plate unit,

4 shows a schematic, fragmentary cross-sectional view of the plate unit according to FIG. 3, FIG. 5 shows a schematic perspective view of a substance-shear packet with a multiplicity of plate units according to FIG.

6 shows a schematic, fragmentary cross-sectional view of the substance exchanger according to FIG. 5, FIG.

7 shows a schematic representation of the main flow directions in the material exchanger packet according to FIG. 5 with crossflow,

8 shows a schematic plan view of a plate in a further embodiment,

9 shows a schematic perspective view of the plate according to FIG. 8, FIG.

10 shows a schematic perspective view of a disk unit, FIG. 11 shows a schematic perspective view of a mass transfer packet with a plurality of disk units according to FIG. 8, FIG.

12 shows a schematic, fragmentary cross-sectional view of the mass exchanger according to FIG 11,

13 shows a schematic cross-sectional view of two adjacent plate units according to FIG. 8, FIG.

1 shows a schematic representation of the main flow directions in the substance exchanger packet according to FIG. 11 with cross / counterflow.

FIG. 1 shows a schematic plan view of a plate 11 in a first embodiment. In this embodiment, the plate 11 is rectangular and made of a plastic, for example by deep drawing. The plate 11 according to the invention comprises a channel structure 12, which is designed as a fold. This folded channel structure 12 forms a plurality of mutually parallel channels 13, through which, in an assembled state, a fluid, for example a gas, flows (see FIG. 5). For example, the channel structure 12 is embossed in the plastic plate 11. The channels 13 each have a recessed bottom and a plateau (see Figure 4). The valley bottoms and the plateaus each form one level. In the embodiment shown here, the channels 13 extend in a main flow direction Vi from one side of the plate 11 to an opposite side of the rectangular plate 11. The course of the channels 12 has zigzag deviations or several direction changes from the main direction of flow VI. The zigzag-shaped passageway serves as a turbulence generator, so that when flowing through the channels 13, the formation of standing boundary layers of the gas is prevented and cross flows increase the contact frequency of the gas with the membrane and the mass transfer accelerate. The deviation from the main flow direction is approx. ± 5 ° in the respective duct sections.

Through the folded channel structure 12 and through the zigzagged channel course, the plastic plate 11 is stiffened in two three directions. The folding causes a stiffening along the main flow direction VI and the zigzag shape of the channels 13 causes a stiffening transversely to the main flow direction VI as well as vertical to the plate plane.

As a result, a 3-dimensional rigidity is achieved in comparison to the conventionally used rectilinear folds.

Along the channels 13, that is on two opposite outer sides of the channel structure 12, the plate 11 in each case has a channel-free region 15. This area 15 serves to fasten a membrane spanned onto the plate 11 (see FIG. 3). According to this embodiment, the channel-free regions 15 and the plateaus of the channels 13 lie on one plane.

In the plan view of Figure 1, the substantially flat top of the plate 11 is shown, wherein the bottoms of the channels 13 in the direction of the underside of the plate 11, that is, in the plane, are formed or recessed. FIG. 2 also shows a schematic, fragmentary perspective view of the underside of the plate 11 according to FIG. 1. Here, in particular, the embossed and recessed channels 13 can be seen. Between the channels 13 each intermediate channels 14 are arranged, wherein the intermediate channels 14 are formed analogous to the channels 13. The channels 13 and intermediate channels 14 are trapezoidal (see Figure 4), with a larger base area is aligned in each case to the membrane.

3 shows a schematic perspective view of a plate unit 10 with the plate 11 according to the embodiment of Figure 1 and a membrane 16. The membrane 16 is disposed on the flat top of the plate 11 and here auf- stressed. According to the invention, the membrane 16 is a selectively permeable membrane. The shape of the membrane 16 substantially corresponds to the rectangular shape of the plate 11. For fastening, the membrane 16 is connected to the plate-free areas 15 with the plate 11, for example, welded. In order to stabilize the membrane 16, this lies flat on the plateaus of the channels of the flat top of the plate 11. Thus, the membrane 16 is supported by the channel structure 12, wherein the plateaus form a support surface for the membrane 16 (see Figure 4).

FIG. 4 shows a detail of the plate unit 10 of FIG. 3 in a cross-sectional view. Here, on the one hand, the trapezoidal shape of the channels 13 and intermediate channels 14 is shown and on the other hand it is shown how the membrane 16 just rests on the supporting surfaces formed by the channel structure 12. The membrane 16 actively closes the channels 13 of the plate unit 10. The intermediate channels 14 are passively closed by the membrane 16 of a plate unit arranged underneath, when resting on them (see FIG. 6).

FIG. 5 shows a schematic perspective view of a fabric exchanger package 20 with a plurality of disk units 10. The disk units 10 correspond to the embodiment of FIG. 3. A detailed description is therefore omitted. The same components are identified by the same reference numerals. In the material exchanger package 20, the disk units 10 are stacked on each other. Adjacent or superimposed disk units 10 are each rotated by 90 ° to each other, so that the

Main flow directions in adjacent disk units 10 cross each other (see Figure 7). Accordingly, a cross-flow is realized in the material exchanger packet 20 according to FIG. Through the channels and intermediate channels of the plate units 10 alternately flow two different gases.

As a result, a temperature and / or moisture exchange between the gases through the membranes 16 is made possible. FIG. 6 again shows a fragmentary cross-sectional view of the plate units 10 of the substance exchanger 20 according to FIG. 5. The plate units 10 are each arranged rotated by 90 °, so that the main flow directions of superimposed plate units 10 intersect. Due to the plate units 10, which are rotated by 90 °, the cross sections of the channel structures are shown differently. The channels are alternately cut longitudinally or transversely.

FIG. 7 shows a schematic illustration of the main flow directions Vi and V2 in the material exchanger packet 20 according to FIG. 5. The main flow direction VI is shown as dotted lines and the main flow direction V2 as dashed lines. VI denotes the main flow direction of a first gas in a plate unit 10, and V2 denotes the main flow direction of a second gas in an adjacent plate unit 10 rotated by 90 °. The gas streams enter, cross and enter at two adjacent sides of the disk units 10 the other two, adjacent sides of the disk units 10 from these. In the material exchanger thus a cross-flow is realized with 90 ° crossing main flow directions VI and V2. In the case of the crossflow shown here, the gas streams already enter the plate units 10 obliquely, so that turbulences are already generated when the gas streams enter the channels.

FIG. 8 shows a schematic plan view of a plate 11 in a further embodiment. In principle, the embodiment of the plate 11 shown in FIG. 1 corresponds to this further embodiment of FIG. 8. In the following, therefore, the differences of the embodiments will be discussed in particular. According to FIG. 8, the plate 11 is hexagonal, oblong and has a folded channel structure 12, which forms the channels 13 on the upper side and the intermediate channels on the lower side (see FIG. 9). The hexagonal shape of the plate 11 defines three different flow areas, with a first and a third flow area are the same. In the two flow areas I at the beginning and end of the channels 13, the channels 13 are straight. In the intermediate flow region II, the channels 13 extend in a zig-zag shape as in the embodiment of the rectangular plate 11 according to FIG. 1. The main flow direction VI runs along the length of the plate 11, with the inflow and outflow regions of the channels being arranged obliquely opposite one another , Laterally of the channels 13, a channel-free region 15 is in each case formed, on which a membrane with the plate 11 can be connected.

FIG. 9 shows a schematic perspective view of the upper side of the plate 11 according to FIG. 8. On the underside of the plate 11, the intermediate channels 14 are shown, which are arranged between the channels 13 and, unlike the channels 13, are open from the underside.

FIG. 10 shows a schematic perspective view of a plate unit 10, wherein the plate 11 of the plate unit 10 corresponds to the hexagonal embodiment of FIG. On top of the membrane 16 is arranged and connected to the channel-free areas with the plate 11, for example, jammed. According to the invention, the membrane 16 is a selectively permeable membrane. The membrane 16 rests on the plateaus of the channels 13 and thus actively closes the channels 13. On the other hand, the intermediate channels 14 are open on the underside and become passive when stacking a plurality of disk units 10 to a fabric exchanger package (see Figure 11) of the membrane 16th an underlying plate unit 10 is closed.

FIG. 11 shows a schematic perspective view of a material exchanger package 20 with a multiplicity of plate units 10 according to FIG. 8. In this embodiment, superimposed plate units 10 are each rotated by 180 ° relative to one another. The resulting cross / countercurrent flow is shown in FIG. 14 with partially intersecting and oppositely directed main flow directions. FIG. 12 also shows a schematic, fragmentary, cross-sectional view of the mass exchanger 20 according to FIG. 11. Here, a plurality of stacked plate units 10 are shown, wherein the different flow areas I and II can be seen longitudinally or transversely on the basis of the differently cut channel structure.

FIG. 13 shows a schematic cross-sectional view of two adjacent plate units 10 according to FIG. 8 in the middle flow region II with counterflow. In this illustration, the offset of the stacked disk units 10 can be seen particularly clearly. A first gas (further hatching) flows through the channels 13 and intermediate channels 14 of a first, upper plate unit 10a, while a second gas (narrower hatching) flows through the channels 13 and intermediate channels 14 of a second plate unit 10b. The gases are separated only by the membrane 16 located between the plate units 10a and 10b, through which a material exchange takes place. In the arrangement shown here, the channels 13 are offset such that the bottoms of the channels 13 of the first disk unit 10a are located above the plateaus of the channels 13 of the second disk unit 10b. Thus, in each case exactly one intermediate channel 14 is arranged above a channel 13 and vice versa. The open membrane area between the channels 13 and the intermediate channels 14 is thus maximum and corresponds to a channel width b. Furthermore, the bottoms of the upper disk unit 10 are located directly on the plateaus of the lower disk unit 10 and are fully supported by them. The support surface a between the disk units 10 is thus maximum.

FIG. 14 also shows a schematic representation of the main flow directions VI and V2 in the substance exchanger packet 20 according to FIG. 11 with cross / countercurrent flow. In each of the two flow regions I, a cross flow is formed and in the intermediate flow region II a countercurrent with staggered channels. The gas streams also flow obliquely into the disk units 10, to create a slightly turbulent flow already when flowing.

Although the invention has been further illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

reference numeral

10 disk unit

10a first disk unit 10b second disk unit

11 plate

12 channel structure

13 channel

14 intermediate channel

15 ^' channel-free area

16 membrane

17 bottom

18 Plateau 20 Substance exchanger package a Support surface

b channel width

VI, V2 main flow directions I, II flow ranges

Claims

claims

1. plate unit (10) of a gas-gas material exchanger for the mass transfer between air flows in buildings at least comprising:

1.1. at least one plate (11) with at least one channel structure (12), which forms at least one channel (13) for a fluid, wherein the at least one plate (11) is made of a plastic, and

1.2. at least one selectively permeable membrane (16) which is clamped on the at least one plate (11).

Second plate unit (10) according to the preceding patent claim 1, characterized ge indicates that the at least one channel (13) has a trapezoidal cross-section.

3. plate unit (10) according to any one of the preceding claims 1 to 2, characterized ge characterized in that the at least one plate (11) is stiffened either by the channel structure or by a (n) according to a) channel course or channel shape in at least one direction ,

4. plate unit (10) according to one of the preceding claims 1 to 3, characterized ge ize itch that the at least one channel structure (12) as a convolution in the at least one plate (11) is embossed.

5. plate unit (10) according to one of the preceding claims 1 to 4, characterized ge kenn ze i chnet that the at least one channel (11) has a (n) in the flow turbulence generating (n) channel shape and / or channel profile. Plate unit (10) according to the preceding patent claim 5, characterized ge kenn ze ichnet that the at least one channel (13) has at least one turbulence generating means in the Strö ^¬ tion.

The plate unit (10) according to the preceding claim 6, characterized in that the at least one turbulence generating means is formed as one of the following list: naps, edges, hills, dimples, spirals, undulations, grooves, odd channel shape , in particular zigzag-shaped channel profile and / or sinusoidal channel profile.

Plate unit (10) according to one of the preceding claims 1 to 7, characterized ge characterized in that the at least one membrane (16) as a dense, in particular airtight, membrane (16) is formed.

Plate unit (10) according to one of the preceding claims 1 to 7, characterized ge kenn ze ichnet that the at least one membrane (16) is formed as a porous membrane (16).

Plate unit (10) according to one of the preceding claims 1 to 9, characterized ge kenn ze i chnet that the at least one membrane (16) rests on at least one location on the at least one channel structure (12).

Plate unit (10) according to one of the preceding claims 1 to 10, characterized in that the at least one membrane (16) is connected at least in an outer region of the at least one plate (11) with the at least one plate (11). Panel unit (10) according to one of the preceding claims 1 to 11, characterized in that the at least one membrane (16) is connected at at least one location with the at least one channel structure (12).

Plate unit (10) according to one of the preceding claims 11 to 12, characterized in that the at least one membrane (16) is connected by welding, pressing, embossing, clamping and / or adhesive ben.

14. Gas-gas substance exchanger for the mass transfer between air flows in buildings, at least comprising:

14.1. a material exchanger packet (20) comprising a multiplicity of parallelly arranged substance exchanger plate units, through whose channels (13) alternately a first fluid and a second fluid respectively flows,

characterized in that

14.2. the fabric exchanger plate units as plate units (10) according to one of the preceding .. Claims 1 to 13 are formed.

Fabric exchanger according to the preceding claim 14, characterized in that the channel structures (12) each form a support structure for adjacent plate units (10).

Substance exchanger according to one of the preceding claims 14 to 15, characterized ge kenn ze ichnet that at least partially a cross-flow of the first fluid is formed to the second fluid.

Substance exchanger according to one of the preceding claims 14 to 15, characterized GEnet ichnet that at least partially a countercurrent of the first fluid 'is formed to the second fluid. Substance exchanger according to one of the preceding claims 14 to 17, characterized marked zei chnet that adjacent plate units (10) are arranged in each case entangled to each other.

Fabric exchanger according to the preceding claim 18, characterized in that adjacent plate units (10) are arranged in each case rotated by 90 °.

Substance exchanger according to the preceding claim 18, characterized ge kennzei chnet that adjacent plate units (10) are arranged in each case rotated by 180 °

Substance exchanger according to one of the preceding claims 14 to 19, characterized ge kenn ze i chnet that an offset of the channels (13) one above the other plate units (10) is provided such that the bottom (17) of a channel (13) at least partially on the plateau (18) of an underlying channel (13) ^{■ is} arranged.

Substance exchanger according to one of the preceding claims 14 to 19, characterized ge kenn ze ichnet that superimposed disk units (10) are arranged offset by a channel width (b) to each other.

Building ventilation system for the mass transfer between air flows in buildings, the building ventilation system is arranged in an air flow of the building, characterized ge kennzei chnet that the building ventilation system is designed as a gas-gas-material exchanger according to one of the preceding claims 14 to 22. Building ventilation system according to the preceding claim 23, characterized ge ize it chnet that the building ventilation system designed as air conditioning